mono/mini/mini-s390x.c

   1 /*------------------------------------------------------------------*/
   2 /*                                                                  */
   3 /* Name        - mini-s390.c                                        */
   4 /*                                                                  */
   5 /* Function    - S/390 backend for the Mono code generator.         */
   6 /*                                                                  */
   7 /* Name        - Neale Ferguson (Neale.Ferguson@SoftwareAG-usa.com) */
   8 /*                                                                  */
   9 /* Date        - January, 2004                                      */
  10 /*                                                                  */
  11 /* Derivation  - From mini-x86 & mini-ppc by -                      */
  12 /*               Paolo Molaro (lupus@ximian.com)                    */
  13 /*               Dietmar Maurer (dietmar@ximian.com)                */
  14 /*                                                                  */
  15 /*------------------------------------------------------------------*/
  16
  17 /*------------------------------------------------------------------*/
  18 /*                 D e f i n e s                                    */
  19 /*------------------------------------------------------------------*/
  20
  21 #define MAX_ARCH_DELEGATE_PARAMS 7
  22
  23 #define EMIT_COND_BRANCH(ins,cond)                                              \
  24 {                                                                               \
  25 if (ins->inst_true_bb->native_offset) {                                         \
  26         int displace;                                                           \
  27         displace = ((cfg->native_code +                                         \
  28                     ins->inst_true_bb->native_offset) - code) / 2;              \
  29         if (s390_is_imm16(displace)) {                                          \
  30                 s390_brc (code, cond, displace);                                \
  31         } else {                                                                \
  32                 s390_jcl (code, cond, displace);                                \
  33         }                                                                       \
  34 } else {                                                                        \
  35         mono_add_patch_info (cfg, code - cfg->native_code,                      \
  36                              MONO_PATCH_INFO_BB, ins->inst_true_bb);            \
  37         s390_jcl (code, cond, 0);                                               \
  38 }                                                                               \
  39 }
  40
  41 #define EMIT_UNCOND_BRANCH(ins)                                                 \
  42 {                                                                               \
  43 if (ins->inst_target_bb->native_offset) {                                       \
  44         int displace;                                                           \
  45         displace = ((cfg->native_code +                                         \
  46                     ins->inst_target_bb->native_offset) - code) / 2;            \
  47         if (s390_is_imm16(displace)) {                                          \
  48                 s390_brc (code, S390_CC_UN, displace);                          \
  49         } else {                                                                \
  50                 s390_jcl (code, S390_CC_UN, displace);                          \
  51         }                                                                       \
  52 } else {                                                                        \
  53         mono_add_patch_info (cfg, code - cfg->native_code,                      \
  54                              MONO_PATCH_INFO_BB, ins->inst_target_bb);          \
  55         s390_jcl (code, S390_CC_UN, 0);                                         \
  56 }                                                                               \
  57 }
  58
  59 #define EMIT_COND_SYSTEM_EXCEPTION(cond,exc_name)                       \
  60         do {                                                            \
  61                 mono_add_patch_info (cfg, code - cfg->native_code,      \
  62                                     MONO_PATCH_INFO_EXC, exc_name);     \
  63                 s390_jcl (code, cond, 0);                               \
  64         } while (0);
  65
  66 #define CHECK_SRCDST_COM                                                \
  67         if (ins->dreg == ins->sreg2) {                                  \
  68                 src2 = ins->sreg1;                                      \
  69         } else {                                                        \
  70                 src2 = ins->sreg2;                                      \
  71                 if (ins->dreg != ins->sreg1) {                          \
  72                         s390_lgr (code, ins->dreg, ins->sreg1);         \
  73                 }                                                       \
  74         }
  75
  76 #define CHECK_SRCDST_NCOM                                               \
  77         if (ins->dreg == ins->sreg2) {                                  \
  78                 src2 = s390_r13;                                        \
  79                 s390_lgr (code, s390_r13, ins->sreg2);                  \
  80         } else {                                                        \
  81                 src2 = ins->sreg2;                                      \
  82         }                                                               \
  83         if (ins->dreg != ins->sreg1) {                                  \
  84                 s390_lgr (code, ins->dreg, ins->sreg1);                 \
  85         }
  86
  87 #define CHECK_SRCDST_COM_I                                              \
  88         if (ins->dreg == ins->sreg2) {                                  \
  89                 src2 = ins->sreg1;                                      \
  90         } else {                                                        \
  91                 src2 = ins->sreg2;                                      \
  92                 if (ins->dreg != ins->sreg1) {                          \
  93                         s390_lgfr (code, ins->dreg, ins->sreg1);        \
  94                 }                                                       \
  95         }
  96
  97 #define CHECK_SRCDST_NCOM_I                                             \
  98         if (ins->dreg == ins->sreg2) {                                  \
  99                 src2 = s390_r13;                                        \
 100                 s390_lgfr (code, s390_r13, ins->sreg2);                 \
 101         } else {                                                        \
 102                 src2 = ins->sreg2;                                      \
 103         }                                                               \
 104         if (ins->dreg != ins->sreg1) {                                  \
 105                 s390_lgfr (code, ins->dreg, ins->sreg1);                \
 106         }
 107
 108 #define CHECK_SRCDST_COM_F                                              \
 109         if (ins->dreg == ins->sreg2) {                                  \
 110                 src2 = ins->sreg1;                                      \
 111         } else {                                                        \
 112                 src2 = ins->sreg2;                                      \
 113                 if (ins->dreg != ins->sreg1) {                          \
 114                         s390_ldr (code, ins->dreg, ins->sreg1);         \
 115                 }                                                       \
 116         }
 117
 118 #define CHECK_SRCDST_NCOM_F                                             \
 119         if (ins->dreg == ins->sreg2) {                                  \
 120                 src2 = s390_f15;                                        \
 121                 s390_ldr (code, s390_r13, ins->sreg2);                  \
 122         } else {                                                        \
 123                 src2 = ins->sreg2;                                      \
 124         }                                                               \
 125         if (ins->dreg != ins->sreg1) {                                  \
 126                 s390_ldr (code, ins->dreg, ins->sreg1);                 \
 127         }
 128
 129 #define MONO_EMIT_NEW_MOVE(cfg,dest,offset,src,imm,size) do {                   \
 130                 MonoInst *inst;                                                 \
 131                 int sReg, dReg;                                                 \
 132                 MONO_INST_NEW (cfg, inst, OP_NOP);                              \
 133                 if (size > 256) {                                               \
 134                         inst->dreg        = dest;                               \
 135                         inst->inst_offset = offset;                             \
 136                         inst->sreg1       = src;                                \
 137                         inst->inst_imm    = imm;                                \
 138                 } else {                                                        \
 139                         if (s390_is_uimm12(offset)) {                           \
 140                                 inst->dreg        = dest;                       \
 141                                 inst->inst_offset = offset;                     \
 142                         } else {                                                \
 143                                 dReg = mono_alloc_preg (cfg);                   \
 144                                 MONO_EMIT_NEW_BIALU_IMM(cfg, OP_ADD_IMM,        \
 145                                         dReg, dest, offset);                    \
 146                                 inst->dreg        = dReg;                       \
 147                                 inst->inst_offset = 0;                          \
 148                         }                                                       \
 149                         if (s390_is_uimm12(imm)) {                              \
 150                                 inst->sreg1       = src;                        \
 151                                 inst->inst_imm    = imm;                        \
 152                         } else {                                                \
 153                                 sReg = mono_alloc_preg (cfg);                   \
 154                                 MONO_EMIT_NEW_BIALU_IMM(cfg, OP_ADD_IMM,        \
 155                                         sReg, src, imm);                        \
 156                                 inst->sreg1       = sReg;                       \
 157                                 inst->inst_imm    = 0;                          \
 158                         }                                                       \
 159                 }                                                               \
 160                 inst->opcode            = OP_S390_MOVE;                         \
 161                 inst->backend.size      = size;                                 \
 162         MONO_ADD_INS (cfg->cbb, inst);                                          \
 163         } while (0)
 164
 165 #define MONO_OUTPUT_VTR(cfg, size, dr, sr, so) do {                             \
 166         int reg = mono_alloc_preg (cfg); \
 167         switch (size) {                                                         \
 168                 case 0:                                                         \
 169                         MONO_EMIT_NEW_ICONST(cfg, reg, 0);                      \
 170                 break;                                                          \
 171                 case 1:                                                         \
 172                         MONO_EMIT_NEW_LOAD_MEMBASE_OP(cfg, OP_LOADU1_MEMBASE,   \
 173                                 reg, sr, so);                                   \
 174                 break;                                                          \
 175                 case 2:                                                         \
 176                         MONO_EMIT_NEW_LOAD_MEMBASE_OP(cfg, OP_LOADU2_MEMBASE,   \
 177                                 reg, sr, so);                                   \
 178                 break;                                                          \
 179                 case 4:                                                         \
 180                         MONO_EMIT_NEW_LOAD_MEMBASE_OP(cfg, OP_LOADI4_MEMBASE,   \
 181                                 reg, sr, so);                                   \
 182                 break;                                                          \
 183                 case 8:                                                         \
 184                         MONO_EMIT_NEW_LOAD_MEMBASE_OP(cfg, OP_LOADI8_MEMBASE,   \
 185                                 reg, sr, so);                                   \
 186                 break;                                                          \
 187         }                                                                       \
 188         mono_call_inst_add_outarg_reg(cfg, call, reg, dr, FALSE);               \
 189 } while (0)
 190
 191 #define MONO_OUTPUT_VTS(cfg, size, dr, dx, sr, so) do {                         \
 192         int tmpr;                                                               \
 193         switch (size) {                                                         \
 194                 case 0:                                                         \
 195                         tmpr = mono_alloc_preg (cfg); \
 196                         MONO_EMIT_NEW_ICONST(cfg, tmpr, 0);                     \
 197                         MONO_EMIT_NEW_STORE_MEMBASE(cfg, OP_STORE_MEMBASE_REG,  \
 198                                 dr, dx, tmpr);                                  \
 199                 break;                                                          \
 200                 case 1:                                                         \
 201                         tmpr = mono_alloc_preg (cfg); \
 202                         MONO_EMIT_NEW_LOAD_MEMBASE_OP(cfg, OP_LOADU1_MEMBASE,   \
 203                                 tmpr, sr, so);                                  \
 204                         MONO_EMIT_NEW_STORE_MEMBASE(cfg, OP_STORE_MEMBASE_REG,  \
 205                                 dr, dx, tmpr);                                  \
 206                 break;                                                          \
 207                 case 2:                                                         \
 208                         tmpr = mono_alloc_preg (cfg);                           \
 209                         MONO_EMIT_NEW_LOAD_MEMBASE_OP(cfg, OP_LOADU2_MEMBASE,   \
 210                                 tmpr, sr, so);                                  \
 211                         MONO_EMIT_NEW_STORE_MEMBASE(cfg, OP_STORE_MEMBASE_REG,  \
 212                                 dr, dx, tmpr);                                  \
 213                 break;                                                          \
 214                 case 4:                                                         \
 215                         tmpr = mono_alloc_preg (cfg);                           \
 216                         MONO_EMIT_NEW_LOAD_MEMBASE_OP(cfg, OP_LOADI4_MEMBASE,   \
 217                                 tmpr, sr, so);                                  \
 218                         MONO_EMIT_NEW_STORE_MEMBASE(cfg, OP_STORE_MEMBASE_REG,  \
 219                                 dr, dx, tmpr);                                  \
 220                 break;                                                          \
 221                 case 8:                                                         \
 222                         MONO_EMIT_NEW_MOVE (cfg, dr, dx, sr, so, size);         \
 223                 break;                                                          \
 224         }                                                                       \
 225 } while (0)
 226
 227 #undef DEBUG
 228 #define DEBUG(a) if (cfg->verbose_level > 1) a
 229
 230 #define MAX_EXC 16
 231
 232 #define S390_TRACE_STACK_SIZE (5*sizeof(gpointer)+4*sizeof(gdouble))
 233
 234 #define BREAKPOINT_SIZE         sizeof(breakpoint_t)
 235 #define S390X_NOP_SIZE          sizeof(I_Format)
 236
 237 #define MAX(a, b) ((a) > (b) ? (a) : (b))
 238
 239 /*
 240  * imt thunking size values
 241  */
 242 #define CMP_SIZE        24
 243 #define LOADCON_SIZE    20
 244 #define LOAD_SIZE       6
 245 #define BR_SIZE         2
 246 #define JUMP_SIZE       6
 247 #define ENABLE_WRONG_METHOD_CHECK 0
 248
 249 #define mono_mini_arch_lock() EnterCriticalSection (&mini_arch_mutex)
 250 #define mono_mini_arch_unlock() LeaveCriticalSection (&mini_arch_mutex)
 251
 252 /*========================= End of Defines =========================*/
 253
 254 /*------------------------------------------------------------------*/
 255 /*                 I n c l u d e s                                  */
 256 /*------------------------------------------------------------------*/
 257
 258 #include "mini.h"
 259 #include <string.h>
 260
 261 #include <mono/metadata/appdomain.h>
 262 #include <mono/metadata/debug-helpers.h>
 263 #include <mono/metadata/profiler-private.h>
 264 #include <mono/utils/mono-math.h>
 265 #include <mono/utils/mono-mmap.h>
 266
 267 #include "mini-s390x.h"
 268 #include "cpu-s390x.h"
 269 #include "jit-icalls.h"
 270 #include "ir-emit.h"
 271 #include "trace.h"
 272
 273 /*========================= End of Includes ========================*/
 274
 275 /*------------------------------------------------------------------*/
 276 /*                 T y p e d e f s                                  */
 277 /*------------------------------------------------------------------*/
 278
 279 typedef struct {
 280         guint stack_size,
 281               local_size,
 282               code_size,
 283               parm_size,
 284               offset,
 285               offStruct,
 286               retStruct;
 287 } size_data;
 288
 289 /*------------------------------------------------------------------*/
 290 /* Used by the instrument_emit_epilog                               */
 291 /*------------------------------------------------------------------*/
 292
 293 enum {
 294         SAVE_NONE,
 295         SAVE_STRUCT,
 296         SAVE_ONE,
 297         SAVE_TWO,
 298         SAVE_R4,
 299         SAVE_R8
 300 };
 301
 302 typedef struct InstList InstList;
 303
 304 struct InstList {
 305         InstList *prev;
 306         InstList *next;
 307         MonoInst *data;
 308 };
 309
 310 typedef enum {
 311         RegTypeGeneral,
 312         RegTypeBase,
 313         RegTypeFP,
 314         RegTypeFPR4,
 315         RegTypeStructByVal,
 316         RegTypeStructByValInFP,
 317         RegTypeStructByAddr,
 318         RegTypeStructByAddrOnStack
 319 } ArgStorage;
 320
 321 typedef struct {
 322         gint32  offset;         /* offset from caller's stack */
 323         gint32  offparm;        /* offset from callee's stack */
 324         guint16 vtsize;         /* in param area */
 325         guint8  reg;
 326         ArgStorage regtype;
 327         guint32 size;           /* Size of structure used by RegTypeStructByVal */
 328         gint32  type;           /* Data type of argument */
 329 } ArgInfo;
 330
 331 typedef struct {
 332         int nargs;
 333         int lastgr;
 334         guint32 stack_usage;
 335         guint32 struct_ret;
 336         ArgInfo ret;
 337         ArgInfo sigCookie;
 338         size_data sz;
 339         int vret_arg_index;
 340         ArgInfo args [1];
 341 } CallInfo;
 342
 343 typedef struct {
 344         gint64  gr[5];          /* R2-R6                            */
 345         gdouble fp[3];          /* F0-F2                            */
 346 } __attribute__ ((packed)) RegParm;
 347
 348 typedef struct {
 349         RR_Format  basr;
 350         RI_Format  j;
 351         void       *pTrigger;
 352         RXY_Format lg;
 353         RXY_Format trigger;
 354 } __attribute__ ((packed)) breakpoint_t;
 355
 356 /*========================= End of Typedefs ========================*/
 357
 358 /*------------------------------------------------------------------*/
 359 /*                   P r o t o t y p e s                            */
 360 /*------------------------------------------------------------------*/
 361
 362 static void indent (int);
 363 static guint8 * backUpStackPtr(MonoCompile *, guint8 *);
 364 static void decodeParm (MonoType *, void *, int);
 365 static void enter_method (MonoMethod *, RegParm *, char *);
 366 static void leave_method (MonoMethod *, ...);
 367 static gboolean is_regsize_var (MonoType *);
 368 static inline void add_general (guint *, size_data *, ArgInfo *);
 369 static inline void add_stackParm (guint *, size_data *, ArgInfo *, gint);
 370 static inline void add_float (guint *, size_data *, ArgInfo *);
 371 static CallInfo * get_call_info (MonoCompile *, MonoMemPool *, MonoMethodSignature *);
 372 static guchar * emit_float_to_int (MonoCompile *, guchar *, int, int, int, gboolean);
 373 static guint8 * emit_load_volatile_arguments (guint8 *, MonoCompile *);
 374 static void catch_SIGILL(int, siginfo_t *, void *);
 375 static __inline__ void emit_unwind_regs(MonoCompile *, guint8 *, int, int, long);
 376
 377 /*========================= End of Prototypes ======================*/
 378
 379 /*------------------------------------------------------------------*/
 380 /*                 G l o b a l   V a r i a b l e s                  */
 381 /*------------------------------------------------------------------*/
 382
 383 int mono_exc_esp_offset = 0;
 384
 385 static int indent_level = 0;
 386
 387 int has_ld = 0;
 388
 389 static gint appdomain_tls_offset = -1,
 390             lmf_tls_offset = -1,
 391             lmf_addr_tls_offset = -1;
 392
 393 pthread_key_t lmf_addr_key;
 394
 395 gboolean lmf_addr_key_inited = FALSE;
 396
 397 facilityList_t facs;
 398
 399 #if 0
 400
 401 extern __thread MonoDomain *tls_appdomain;
 402 extern __thread MonoThread *tls_current_object;
 403 extern __thread gpointer   mono_lmf_addr;
 404
 405 #endif
 406
 407 /*
 408  * The code generated for sequence points reads from this location,
 409  * which is made read-only when single stepping is enabled.
 410  */
 411 static gpointer ss_trigger_page;
 412
 413 /*
 414  * Enabled breakpoints read from this trigger page
 415  */
 416 static gpointer bp_trigger_page;
 417
 418 breakpoint_t breakpointCode;
 419
 420 /*
 421  * This mutex protects architecture specific caches
 422  */
 423 static CRITICAL_SECTION mini_arch_mutex;
 424
 425 /*====================== End of Global Variables ===================*/
 426
 427 /*------------------------------------------------------------------*/
 428 /*                                                                  */
 429 /* Name         - mono_arch_regname                                 */
 430 /*                                                                  */
 431 /* Function     - Returns the name of the register specified by     */
 432 /*                the input parameter.                              */
 433 /*                                                                  */
 434 /*------------------------------------------------------------------*/
 435
 436 const char*
 437 mono_arch_regname (int reg) {
 438         static const char * rnames[] = {
 439                 "s390_r0", "s390_sp", "s390_r2", "s390_r3", "s390_r4",
 440                 "s390_r5", "s390_r6", "s390_r7", "s390_r8", "s390_r9",
 441                 "s390_r10", "s390_r11", "s390_r12", "s390_r13", "s390_r14",
 442                 "s390_r15"
 443         };
 444
 445         if (reg >= 0 && reg < 16)
 446                 return rnames [reg];
 447         else
 448                 return "unknown";
 449 }
 450
 451 /*========================= End of Function ========================*/
 452
 453 /*------------------------------------------------------------------*/
 454 /*                                                                  */
 455 /* Name         - mono_arch_fregname                                */
 456 /*                                                                  */
 457 /* Function     - Returns the name of the register specified by     */
 458 /*                the input parameter.                              */
 459 /*                                                                  */
 460 /*------------------------------------------------------------------*/
 461
 462 const char*
 463 mono_arch_fregname (int reg) {
 464         static const char * rnames[] = {
 465                 "s390_f0", "s390_f1", "s390_f2", "s390_f3", "s390_f4",
 466                 "s390_f5", "s390_f6", "s390_f7", "s390_f8", "s390_f9",
 467                 "s390_f10", "s390_f11", "s390_f12", "s390_f13", "s390_f14",
 468                 "s390_f15"
 469         };
 470
 471         if (reg >= 0 && reg < 16)
 472                 return rnames [reg];
 473         else
 474                 return "unknown";
 475 }
 476
 477 /*========================= End of Function ========================*/
 478
 479 /*------------------------------------------------------------------*/
 480 /*                                                                  */
 481 /* Name         - arch_get_argument_info                            */
 482 /*                                                                  */
 483 /* Function     - Gathers information on parameters such as size,   */
 484 /*                alignment, and padding. arg_info should be large  */
 485 /*                enough to hold param_count + 1 entries.           */
 486 /*                                                                  */
 487 /* Parameters   - @csig - Method signature                          */
 488 /*                @param_count - No. of parameters to consider      */
 489 /*                @arg_info - An array to store the result info     */
 490 /*                                                                  */
 491 /* Returns      - Size of the activation frame                      */
 492 /*                                                                  */
 493 /*------------------------------------------------------------------*/
 494
 495 int
 496 mono_arch_get_argument_info (MonoGenericSharingContext *gsctx, MonoMethodSignature *csig,
 497                              int param_count,
 498                              MonoJitArgumentInfo *arg_info)
 499 {
 500         int k, frame_size = 0;
 501         int size, align, pad;
 502         int offset = 8;
 503
 504         if (MONO_TYPE_ISSTRUCT (csig->ret)) {
 505                 frame_size += sizeof (gpointer);
 506                 offset += 8;
 507         }
 508
 509         arg_info [0].offset = offset;
 510
 511         if (csig->hasthis) {
 512                 frame_size += sizeof (gpointer);
 513                 offset += 8;
 514         }
 515
 516         arg_info [0].size = frame_size;
 517
 518         for (k = 0; k < param_count; k++) {
 519
 520                 if (csig->pinvoke)
 521                         size = mono_type_native_stack_size (csig->params [k], (guint32 *) &align);
 522                 else
 523                         size = mini_type_stack_size (NULL, csig->params [k], &align);
 524
 525                 frame_size += pad = (align - (frame_size & (align - 1))) & (align - 1);
 526                 arg_info [k].pad = pad;
 527                 frame_size += size;
 528                 arg_info [k + 1].pad = 0;
 529                 arg_info [k + 1].size = size;
 530                 offset += pad;
 531                 arg_info [k + 1].offset = offset;
 532                 offset += size;
 533         }
 534
 535         align = MONO_ARCH_FRAME_ALIGNMENT;
 536         frame_size += pad = (align - (frame_size & (align - 1))) & (align - 1);
 537         arg_info [k].pad = pad;
 538
 539         return frame_size;
 540 }
 541
 542 /*========================= End of Function ========================*/
 543
 544 /*------------------------------------------------------------------*/
 545 /*                                                                  */
 546 /* Name         - emit_unwind_regs.                                 */
 547 /*                                                                  */
 548 /* Function     - Determines if a value can be returned in one or   */
 549 /*                two registers.                                    */
 550 /*                                                                  */
 551 /*------------------------------------------------------------------*/
 552
 553 static void __inline__
 554 emit_unwind_regs(MonoCompile *cfg, guint8 *code, int start, int end, long offset)
 555 {
 556         int i;
 557
 558         for (i = start; i < end; i++) {
 559                 mono_emit_unwind_op_offset (cfg, code, i, offset);
 560                 offset += sizeof(gulong);
 561         }
 562 }
 563
 564 /*========================= End of Function ========================*/
 565
 566 /*------------------------------------------------------------------*/
 567 /*                                                                  */
 568 /* Name         - retFitsInReg.                                     */
 569 /*                                                                  */
 570 /* Function     - Determines if a value can be returned in one or   */
 571 /*                two registers.                                    */
 572 /*                                                                  */
 573 /*------------------------------------------------------------------*/
 574
 575 static inline gboolean
 576 retFitsInReg(guint32 size)
 577 {
 578         switch (size) {
 579                 case 0:
 580                 case 1:
 581                 case 2:
 582                 case 4:
 583                 case 8:
 584                         return (TRUE);
 585                 break;
 586                 default:
 587                         return (FALSE);
 588         }
 589 }
 590
 591 /*========================= End of Function ========================*/
 592
 593 /*------------------------------------------------------------------*/
 594 /*                                                                  */
 595 /* Name         - backStackPtr.                                     */
 596 /*                                                                  */
 597 /* Function     - Restore Stack Pointer to previous frame.          */
 598 /*                                                                  */
 599 /*------------------------------------------------------------------*/
 600
 601 static inline guint8 *
 602 backUpStackPtr(MonoCompile *cfg, guint8 *code)
 603 {
 604         int stackSize = cfg->stack_usage;
 605
 606         if (cfg->frame_reg != STK_BASE)
 607                 s390_lgr (code, STK_BASE, cfg->frame_reg);
 608
 609         if (s390_is_imm16 (stackSize)) {
 610                 s390_aghi  (code, STK_BASE, stackSize);
 611         } else {
 612                 while (stackSize > 32767) {
 613                         s390_aghi  (code, STK_BASE, 32767);
 614                         stackSize -= 32767;
 615                 }
 616                 s390_aghi  (code, STK_BASE, stackSize);
 617         }
 618         return (code);
 619 }
 620
 621 /*========================= End of Function ========================*/
 622
 623 /*------------------------------------------------------------------*/
 624 /*                                                                  */
 625 /* Name         - indent                                            */
 626 /*                                                                  */
 627 /* Function     - Perform nice indenting to current level           */
 628 /*                                                                  */
 629 /*------------------------------------------------------------------*/
 630
 631 static void
 632 indent (int diff) {
 633         int v;
 634         if (diff < 0)
 635                 indent_level += diff;
 636         v = indent_level;
 637         printf("[%3d] ",v);
 638         while (v-- > 0) {
 639                 printf (". ");
 640         }
 641         if (diff > 0)
 642                 indent_level += diff;
 643 }
 644
 645 /*========================= End of Function ========================*/
 646
 647 /*------------------------------------------------------------------*/
 648 /*                                                                  */
 649 /* Name         - cvtMonoType                                       */
 650 /*                                                                  */
 651 /* Function     - Convert a mono-type to a string.                  */
 652 /*                                                                  */
 653 /*------------------------------------------------------------------*/
 654
 655 static const char *
 656 cvtMonoType(MonoTypeEnum t)
 657 {
 658   switch(t)
 659     {
 660     case MONO_TYPE_END:
 661       return "MONO_TYPE_END";
 662     case MONO_TYPE_VOID:
 663       return "MONO_TYPE_VOID";
 664     case MONO_TYPE_BOOLEAN:
 665       return "MONO_TYPE_BOOLEAN";
 666     case MONO_TYPE_CHAR:
 667       return "MONO_TYPE_CHAR";
 668     case MONO_TYPE_I1:
 669       return "MONO_TYPE_I1";
 670     case MONO_TYPE_U1:
 671       return "MONO_TYPE_U1";
 672     case MONO_TYPE_I2:
 673       return "MONO_TYPE_I2";
 674     case MONO_TYPE_U2:
 675       return "MONO_TYPE_U2";
 676     case MONO_TYPE_I4:
 677       return "MONO_TYPE_I4";
 678     case MONO_TYPE_U4:
 679       return "MONO_TYPE_U4";
 680     case MONO_TYPE_I8:
 681       return "MONO_TYPE_I8";
 682     case MONO_TYPE_U8:
 683       return "MONO_TYPE_U8";
 684     case MONO_TYPE_R4:
 685       return "MONO_TYPE_R4";
 686     case MONO_TYPE_R8:
 687       return "MONO_TYPE_R8";
 688     case MONO_TYPE_STRING:
 689       return "MONO_TYPE_STRING";
 690     case MONO_TYPE_PTR:
 691       return "MONO_TYPE_PTR";
 692     case MONO_TYPE_BYREF:
 693       return "MONO_TYPE_BYREF";
 694     case MONO_TYPE_VALUETYPE:
 695       return "MONO_TYPE_VALUETYPE";
 696     case MONO_TYPE_CLASS:
 697       return "MONO_TYPE_CLASS";
 698     case MONO_TYPE_VAR:
 699       return "MONO_TYPE_VAR";
 700     case MONO_TYPE_ARRAY:
 701       return "MONO_TYPE_ARRAY";
 702     case MONO_TYPE_GENERICINST:
 703       return "MONO_TYPE_GENERICINST";
 704     case MONO_TYPE_TYPEDBYREF:
 705       return "MONO_TYPE_TYPEDBYREF";
 706     case MONO_TYPE_I:
 707       return "MONO_TYPE_I";
 708     case MONO_TYPE_U:
 709       return "MONO_TYPE_U";
 710     case MONO_TYPE_FNPTR:
 711       return "MONO_TYPE_FNPTR";
 712     case MONO_TYPE_OBJECT:
 713       return "MONO_TYPE_OBJECT";
 714     case MONO_TYPE_SZARRAY:
 715       return "MONO_TYPE_SZARRAY";
 716     case MONO_TYPE_MVAR:
 717       return "MONO_TYPE_MVAR";
 718     case MONO_TYPE_CMOD_REQD:
 719       return "MONO_TYPE_CMOD_REQD";
 720     case MONO_TYPE_CMOD_OPT:
 721       return "MONO_TYPE_CMOD_OPT";
 722     case MONO_TYPE_INTERNAL:
 723       return "MONO_TYPE_INTERNAL";
 724     case MONO_TYPE_MODIFIER:
 725       return "MONO_TYPE_MODIFIER";
 726     case MONO_TYPE_SENTINEL:
 727       return "MONO_TYPE_SENTINEL";
 728     case MONO_TYPE_PINNED:
 729       return "MONO_TYPE_PINNED";
 730     default:
 731       ;
 732     }
 733   return "unknown";
 734 }
 735
 736 /*========================= End of Function ========================*/
 737
 738 /*------------------------------------------------------------------*/
 739 /*                                                                  */
 740 /* Name         - decodeParm                                        */
 741 /*                                                                  */
 742 /* Function     - Decode a parameter for the trace.                 */
 743 /*                                                                  */
 744 /*------------------------------------------------------------------*/
 745
 746 static void
 747 decodeParm(MonoType *type, void *curParm, int size)
 748 {
 749         guint32 simpleType;
 750
 751         if (type->byref) {
 752                 printf("[BYREF:%p], ", *((char **) curParm));
 753         } else {
 754                 simpleType = mono_type_get_underlying_type(type)->type;
 755 enum_parmtype:
 756                 switch (simpleType) {
 757                         case MONO_TYPE_I :
 758                                 printf ("[INTPTR:%p], ", *((int **) curParm));
 759                                 break;
 760                         case MONO_TYPE_U :
 761                                 printf ("[UINTPTR:%p], ", *((int **) curParm));
 762                                 break;
 763                         case MONO_TYPE_BOOLEAN :
 764                                 printf ("[BOOL:%ld], ", *((gint64 *) curParm));
 765                                 break;
 766                         case MONO_TYPE_CHAR :
 767                                 printf ("[CHAR:%c], ", *((int  *) curParm));
 768                                 break;
 769                         case MONO_TYPE_I1 :
 770                                 printf ("[INT1:%ld], ", *((gint64 *) curParm));
 771                                 break;
 772                         case MONO_TYPE_I2 :
 773                                 printf ("[INT2:%ld], ", *((gint64 *) curParm));
 774                                 break;
 775                         case MONO_TYPE_I4 :
 776                                 printf ("[INT4:%ld], ", *((gint64 *) curParm));
 777                                 break;
 778                         case MONO_TYPE_U1 :
 779                                 printf ("[UINT1:%lu], ", *((guint64 *) curParm));
 780                                 break;
 781                         case MONO_TYPE_U2 :
 782                                 printf ("[UINT2:%lu], ", *((guint64 *) curParm));
 783                                 break;
 784                         case MONO_TYPE_U4 :
 785                                 printf ("[UINT4:%lu], ", *((guint64 *) curParm));
 786                                 break;
 787                         case MONO_TYPE_U8 :
 788                                 printf ("[UINT8:%lu], ", *((guint64 *) curParm));
 789                                 break;
 790                         case MONO_TYPE_STRING : {
 791                                 MonoString *s = *((MonoString **) curParm);
 792                                 if (s) {
 793                                         g_assert (((MonoObject *) s)->vtable->klass == mono_defaults.string_class);
 794                                         printf("[STRING:%p:%s], ", s, mono_string_to_utf8(s));
 795                                 } else {
 796                                         printf("[STRING:null], ");
 797                                 }
 798                                 break;
 799                         }
 800                         case MONO_TYPE_CLASS :
 801                         case MONO_TYPE_OBJECT : {
 802                                 MonoObject *obj = *((MonoObject **) curParm);
 803                                 MonoClass *class;
 804                                 if ((obj) && (obj->vtable)) {
 805                                         printf("[CLASS/OBJ:");
 806                                         class = obj->vtable->klass;
 807                                         printf("%p [%p] ",obj,curParm);
 808                                         if (class == mono_defaults.string_class) {
 809                                                 printf("[STRING:%p:%s]",
 810                                                        obj, mono_string_to_utf8 ((MonoString *) obj));
 811                                         } else if (class == mono_defaults.int32_class) {
 812                                                 printf("[INT32:%p:%d]",
 813                                                         obj, *(gint32 *)((char *)obj + sizeof (MonoObject)));
 814                                         } else
 815                                                 printf("[%s.%s:%p]",
 816                                                        class->name_space, class->name, obj);
 817                                         printf("], ");
 818                                 } else {
 819                                         printf("[OBJECT:null], ");
 820                                 }
 821                                 break;
 822                         }
 823                         case MONO_TYPE_PTR :
 824                                 printf("[PTR:%p], ", *((gpointer **) (curParm)));
 825                                 break;
 826                         case MONO_TYPE_FNPTR :
 827                                 printf("[FNPTR:%p], ", *((gpointer **) (curParm)));
 828                                 break;
 829                         case MONO_TYPE_ARRAY :
 830                                 printf("[ARRAY:%p], ", *((gpointer **) (curParm)));
 831                                 break;
 832                         case MONO_TYPE_SZARRAY :
 833                                 printf("[SZARRAY:%p], ", *((gpointer **) (curParm)));
 834                                 break;
 835                         case MONO_TYPE_I8 :
 836                                 printf("[INT8:%ld], ", *((gint64 *) (curParm)));
 837                                 break;
 838                         case MONO_TYPE_R4 :
 839                                 printf("[FLOAT4:%g], ", *((float *) (curParm)));
 840                                 break;
 841                         case MONO_TYPE_R8 :
 842                                 printf("[FLOAT8:%g], ", *((double *) (curParm)));
 843                                 break;
 844                         case MONO_TYPE_VALUETYPE : {
 845                                 int i;
 846                                 MonoMarshalType *info;
 847
 848                                 if (type->data.klass->enumtype) {
 849                                         simpleType = mono_class_enum_basetype (type->data.klass)->type;
 850                                         printf("{VALUETYPE} - ");
 851                                         goto enum_parmtype;
 852                                 }
 853
 854                                 info = mono_marshal_load_type_info (type->data.klass);
 855
 856                                 if ((info->native_size == sizeof(float)) &&
 857                                     (info->num_fields  == 1) &&
 858                                     (info->fields[0].field->type->type == MONO_TYPE_R4)) {
 859                                                 printf("[FLOAT4:%f], ", *((float *) (curParm)));
 860                                         break;
 861                                 }
 862
 863                                 if ((info->native_size == sizeof(double)) &&
 864                                     (info->num_fields  == 1) &&
 865                                     (info->fields[0].field->type->type == MONO_TYPE_R8)) {
 866                                         printf("[FLOAT8:%g], ", *((double *) (curParm)));
 867                                         break;
 868                                 }
 869
 870                                 printf("[VALUETYPE:");
 871                                 for (i = 0; i < size; i++)
 872                                         printf("%02x,", *((guint8 *)curParm+i));
 873                                 printf("], ");
 874                                 break;
 875                         }
 876                         case MONO_TYPE_TYPEDBYREF: {
 877                                 int i;
 878                                 printf("[TYPEDBYREF:");
 879                                 for (i = 0; i < size; i++)
 880                                         printf("%02x,", *((guint8 *)curParm+i));
 881                                 printf("]");
 882                                 break;
 883                         }
 884                         default :
 885                                 printf("[%s], ",cvtMonoType(simpleType));
 886                 }
 887         }
 888 }
 889
 890 /*========================= End of Function ========================*/
 891
 892 /*------------------------------------------------------------------*/
 893 /*                                                                  */
 894 /* Name         - enter_method                                      */
 895 /*                                                                  */
 896 /* Function     - Perform tracing of the entry to the current       */
 897 /*                method.                                           */
 898 /*                                                                  */
 899 /*------------------------------------------------------------------*/
 900
 901 static void
 902 enter_method (MonoMethod *method, RegParm *rParm, char *sp)
 903 {
 904         int i, oParm = 0, iParm = 0;
 905         MonoClass *class;
 906         MonoObject *obj;
 907         MonoMethodSignature *sig;
 908         char *fname;
 909         guint64 ip;
 910         CallInfo *cinfo;
 911         ArgInfo *ainfo;
 912         void *curParm;
 913
 914         fname = mono_method_full_name (method, TRUE);
 915         indent (1);
 916         printf ("ENTER: %s ", fname);
 917         g_free (fname);
 918
 919         ip  = (*(guint64 *) (sp+S390_RET_ADDR_OFFSET));
 920         printf ("ip: %p sp: %p - ", (gpointer) ip, sp);
 921
 922         if (rParm == NULL)
 923                 return;
 924
 925         sig = mono_method_signature (method);
 926
 927         cinfo = get_call_info (NULL, NULL, sig);
 928
 929         if (cinfo->struct_ret) {
 930                 printf ("[STRUCTRET:%p], ", (gpointer) rParm->gr[0]);
 931                 iParm = 1;
 932         }
 933
 934         if (sig->hasthis) {
 935                 gpointer *this = (gpointer *) rParm->gr[iParm];
 936                 obj = (MonoObject *) this;
 937                 switch(method->klass->this_arg.type) {
 938                 case MONO_TYPE_VALUETYPE:
 939                         if (obj) {
 940                                 guint64 *value = (guint64 *) ((uintptr_t)this + sizeof(MonoObject));
 941                                 printf("this:[value:%p:%016lx], ", this, *value);
 942                         } else
 943                                 printf ("this:[NULL], ");
 944                         break;
 945                 case MONO_TYPE_STRING:
 946                         if (obj) {
 947                                 if (obj->vtable) {
 948                                         class = obj->vtable->klass;
 949                                         if (class == mono_defaults.string_class) {
 950                                                 printf ("this:[STRING:%p:%s], ",
 951                                                         obj, mono_string_to_utf8 ((MonoString *)obj));
 952                                         } else {
 953                                                 printf ("this:%p[%s.%s], ",
 954                                                         obj, class->name_space, class->name);
 955                                         }
 956                                 } else
 957                                         printf("vtable:[NULL], ");
 958                         } else
 959                                 printf ("this:[NULL], ");
 960                         break;
 961                 default :
 962                         printf("this[%s]: %p, ",cvtMonoType(method->klass->this_arg.type),this);
 963                 }
 964                 oParm++;
 965         }
 966
 967         for (i = 0; i < sig->param_count; ++i) {
 968                 ainfo = &cinfo->args[i + oParm];
 969                 switch (ainfo->regtype) {
 970                         case RegTypeGeneral :
 971                                 decodeParm(sig->params[i], &(rParm->gr[ainfo->reg-2]), ainfo->size);
 972                                 break;
 973                         case RegTypeFP :
 974                                 decodeParm(sig->params[i], &(rParm->fp[ainfo->reg]), ainfo->size);
 975                                 break;
 976                         case RegTypeBase :
 977                                 decodeParm(sig->params[i], sp+ainfo->offset, ainfo->size);
 978                                 break;
 979                         case RegTypeStructByVal :
 980                                 if (ainfo->reg != STK_BASE) {
 981                                         int offset = sizeof(glong) - ainfo->size;
 982                                         curParm = &(rParm->gr[ainfo->reg-2])+offset;
 983                                 }
 984                                 else
 985                                         curParm = sp+ainfo->offset;
 986
 987                                 if (retFitsInReg (ainfo->vtsize))
 988                                         decodeParm(sig->params[i],
 989                                                    curParm,
 990                                                    ainfo->size);
 991                                 else
 992                                         decodeParm(sig->params[i],
 993                                                    *((char **) curParm),
 994                                                    ainfo->vtsize);
 995                                 break;
 996                         case RegTypeStructByAddr :
 997                                 if (ainfo->reg != STK_BASE)
 998                                         curParm = &(rParm->gr[ainfo->reg-2]);
 999                                 else
1000                                         curParm = sp+ainfo->offset;
1001
1002                                 decodeParm(sig->params[i],
1003                                            *((char **) curParm),
1004                                            ainfo->vtsize);
1005                                 break;
1006
1007                         default :
1008                                 printf("???, ");
1009                 }
1010         }
1011         printf("\n");
1012         g_free(cinfo);
1013 }
1014
1015 /*========================= End of Function ========================*/
1016
1017 /*------------------------------------------------------------------*/
1018 /*                                                                  */
1019 /* Name         - leave_method                                      */
1020 /*                                                                  */
1021 /* Function     -                                                   */
1022 /*                                                                  */
1023 /*------------------------------------------------------------------*/
1024
1025 static void
1026 leave_method (MonoMethod *method, ...)
1027 {
1028         MonoType *type;
1029         char *fname;
1030         guint64 ip;
1031         va_list ap;
1032
1033         va_start(ap, method);
1034
1035         fname = mono_method_full_name (method, TRUE);
1036         indent (-1);
1037         printf ("LEAVE: %s", fname);
1038         g_free (fname);
1039
1040         type = mono_method_signature (method)->ret;
1041
1042 handle_enum:
1043         switch (type->type) {
1044         case MONO_TYPE_VOID:
1045                 break;
1046         case MONO_TYPE_BOOLEAN: {
1047                 int val = va_arg (ap, int);
1048                 if (val)
1049                         printf ("[TRUE:%d]", val);
1050                 else
1051                         printf ("[FALSE]");
1052
1053                 break;
1054         }
1055         case MONO_TYPE_CHAR: {
1056                 int val = va_arg (ap, int);
1057                 printf ("[CHAR:%d]", val);
1058                 break;
1059         }
1060         case MONO_TYPE_I1: {
1061                 int val = va_arg (ap, int);
1062                 printf ("[INT1:%d]", val);
1063                 break;
1064         }
1065         case MONO_TYPE_U1: {
1066                 int val = va_arg (ap, int);
1067                 printf ("[UINT1:%d]", val);
1068                 break;
1069         }
1070         case MONO_TYPE_I2: {
1071                 int val = va_arg (ap, int);
1072                 printf ("[INT2:%d]", val);
1073                 break;
1074         }
1075         case MONO_TYPE_U2: {
1076                 int val = va_arg (ap, int);
1077                 printf ("[UINT2:%d]", val);
1078                 break;
1079         }
1080         case MONO_TYPE_I4: {
1081                 int val = va_arg (ap, int);
1082                 printf ("[INT4:%d]", val);
1083                 break;
1084         }
1085         case MONO_TYPE_U4: {
1086                 int val = va_arg (ap, int);
1087                 printf ("[UINT4:%d]", val);
1088                 break;
1089         }
1090         case MONO_TYPE_I: {
1091                 gint64 val = va_arg (ap, gint64);
1092                 printf ("[INT:%ld]", val);
1093                 printf("]");
1094                 break;
1095         }
1096         case MONO_TYPE_U: {
1097                 gint64 val = va_arg (ap, gint64);
1098                 printf ("[UINT:%lu]", val);
1099                 printf("]");
1100                 break;
1101         }
1102         case MONO_TYPE_STRING: {
1103                 MonoString *s = va_arg (ap, MonoString *);
1104 ;
1105                 if (s) {
1106                         g_assert (((MonoObject *)s)->vtable->klass == mono_defaults.string_class);
1107                         printf ("[STRING:%p:%s]", s, mono_string_to_utf8 (s));
1108                 } else
1109                         printf ("[STRING:null], ");
1110                 break;
1111         }
1112         case MONO_TYPE_CLASS:
1113         case MONO_TYPE_OBJECT: {
1114                 MonoObject *o = va_arg (ap, MonoObject *);
1115
1116                 if ((o) && (o->vtable)) {
1117                         if (o->vtable->klass == mono_defaults.boolean_class) {
1118                                 printf ("[BOOLEAN:%p:%d]", o, *((guint8 *)o + sizeof (MonoObject)));
1119                         } else if  (o->vtable->klass == mono_defaults.int32_class) {
1120                                 printf ("[INT32:%p:%d]", o, *((gint32 *)((char *)o + sizeof (MonoObject))));
1121                         } else if  (o->vtable->klass == mono_defaults.int64_class) {
1122                                 printf ("[INT64:%p:%ld]", o, *((gint64 *)((char *)o + sizeof (MonoObject))));
1123                         } else
1124                                 printf ("[%s.%s:%p]", o->vtable->klass->name_space, o->vtable->klass->name, o);
1125                 } else
1126                         printf ("[OBJECT:%p]", o);
1127
1128                 break;
1129         }
1130         case MONO_TYPE_PTR:
1131         case MONO_TYPE_FNPTR:
1132         case MONO_TYPE_ARRAY:
1133         case MONO_TYPE_SZARRAY: {
1134                 gpointer p = va_arg (ap, gpointer);
1135                 printf ("[result=%p]", p);
1136                 break;
1137         }
1138         case MONO_TYPE_I8: {
1139                 gint64 l =  va_arg (ap, gint64);
1140                 printf ("[LONG:%ld]", l);
1141                 break;
1142         }
1143         case MONO_TYPE_U8: {
1144                 guint64 l =  va_arg (ap, guint64);
1145                 printf ("[ULONG:%lu]", l);
1146                 break;
1147         }
1148         case MONO_TYPE_R4: {
1149                 double f = va_arg (ap, double);
1150                 printf ("[FLOAT4:%g]\n", f);
1151                 break;
1152         }
1153         case MONO_TYPE_R8: {
1154                 double f = va_arg (ap, double);
1155                 printf ("[FLOAT8:%g]\n", f);
1156                 break;
1157         }
1158         case MONO_TYPE_VALUETYPE: {
1159                 MonoMarshalType *info;
1160                 if (type->data.klass->enumtype) {
1161                         type = mono_class_enum_basetype (type->data.klass);
1162                         goto handle_enum;
1163                 } else {
1164                         int size, align;
1165
1166                         info = mono_marshal_load_type_info (type->data.klass);
1167
1168                         if ((info->native_size == sizeof(float)) &&
1169                             (info->num_fields  == 1) &&
1170                             (info->fields[0].field->type->type == MONO_TYPE_R4)) {
1171                                 double f = va_arg (ap, double);
1172                                 printf("[FLOAT4:%g]\n", (double) f);
1173                                 break;
1174                         }
1175
1176                         if ((info->native_size == sizeof(double)) &&
1177                             (info->num_fields  == 1) &&
1178                             (info->fields[0].field->type->type == MONO_TYPE_R8)) {
1179                                 double f = va_arg (ap, double);
1180                                 printf("[FLOAT8:%g]\n", f);
1181                                 break;
1182                         }
1183
1184                         size = mono_type_size (type, &align);
1185                         switch (size) {
1186                                 case 1: {
1187                                         guint32 p = va_arg (ap, guint32);
1188                                         printf ("[%02x]\n",p);
1189                                         break;
1190                                 }
1191                                 case 2: {
1192                                         guint32 p = va_arg (ap, guint32);
1193                                         printf ("[%04x]\n",p);
1194                                         break;
1195                                 }
1196                                 case 4: {
1197                                         guint32 p = va_arg (ap, guint32);
1198                                         printf ("[%08x]\n",p);
1199                                         break;
1200                                 }
1201                                 case 8: {
1202                                         guint64 p = va_arg (ap, guint64);
1203                                         printf ("[%016lx]\n",p);
1204                                         break;
1205                                 }
1206                                 default: {
1207                                         gpointer p = va_arg (ap, gpointer);
1208                                         printf ("[VALUETYPE] %p\n",p);
1209                                 }
1210                         }
1211                 }
1212                 break;
1213         }
1214         case MONO_TYPE_TYPEDBYREF: {
1215                 guint8 *p = va_arg (ap, gpointer);
1216                 int j, size, align;
1217                 size = mono_type_size (type, &align);
1218                 switch (size) {
1219                 case 1:
1220                 case 2:
1221                 case 4:
1222                 case 8:
1223                         printf ("[");
1224                         for (j = 0; p && j < size; j++)
1225                                 printf ("%02x,", p [j]);
1226                         printf ("]\n");
1227                         break;
1228                 default:
1229                         printf ("[TYPEDBYREF]\n");
1230                 }
1231         }
1232                 break;
1233         default:
1234                 printf ("(unknown return type %x)",
1235                         mono_method_signature (method)->ret->type);
1236         }
1237
1238         ip = ((gint64) __builtin_return_address (0));
1239         printf (" ip: %p\n", (gpointer) ip);
1240 }
1241
1242 /*========================= End of Function ========================*/
1243
1244 /*------------------------------------------------------------------*/
1245 /*                                                                  */
1246 /* Name         - catch_SIGILL                                      */
1247 /*                                                                  */
1248 /* Function     - Catch SIGILL as a result of testing for long      */
1249 /*                displacement facility.                            */
1250 /*                                                                  */
1251 /*------------------------------------------------------------------*/
1252
1253 void
1254 catch_SIGILL(int sigNo, siginfo_t *info, void *act) {
1255
1256         has_ld = 0;
1257
1258 }
1259
1260 /*========================= End of Function ========================*/
1261
1262 /*------------------------------------------------------------------*/
1263 /*                                                                  */
1264 /* Name         - mono_arch_cpu_init                                */
1265 /*                                                                  */
1266 /* Function     - Perform CPU specific initialization to execute    */
1267 /*                managed code.                                     */
1268 /*                                                                  */
1269 /*------------------------------------------------------------------*/
1270
1271 void
1272 mono_arch_cpu_init (void)
1273 {
1274         struct sigaction sa,
1275                          *oldSa = NULL;
1276         guint mode = 1;
1277
1278         /*--------------------------------------*/
1279         /* Set default rounding mode for FP     */
1280         /*--------------------------------------*/
1281         __asm__ ("SRNM\t%0\n\t"
1282                 : : "m" (mode));
1283
1284         /*--------------------------------------*/
1285         /* Determine if we have long displace-  */
1286         /* ment facility on this processor      */
1287         /*--------------------------------------*/
1288         sa.sa_sigaction = catch_SIGILL;
1289         sigemptyset (&sa.sa_mask);
1290         sa.sa_flags = SA_SIGINFO;
1291
1292         sigaction (SIGILL, &sa, oldSa);
1293
1294         /*--------------------------------------*/
1295         /* We test by executing the STY inst    */
1296         /*--------------------------------------*/
1297         __asm__ ("LGHI\t0,1\n\t"
1298                  "LA\t1,%0\n\t"
1299                  ".byte\t0xe3,0x00,0x10,0x00,0x00,0x50\n\t"
1300                 : "=m" (has_ld) : : "0", "1");
1301
1302         sigaction (SIGILL, oldSa, NULL);
1303 }
1304
1305 /*========================= End of Function ========================*/
1306
1307 /*------------------------------------------------------------------*/
1308 /*                                                                  */
1309 /* Name         - mono_arch_init.                                   */
1310 /*                                                                  */
1311 /* Function     - Initialize architecture specific code.            */
1312 /*                                                                  */
1313 /*------------------------------------------------------------------*/
1314
1315 void
1316 mono_arch_init (void)
1317 {
1318         guint8 *code;
1319
1320 #if 0
1321         /*
1322          * When we do an architectural level set at z9 or better
1323          * we can use the STFLE instruction to show us
1324          * what hardware facilities are available
1325          */
1326         int lFacility = sizeof(facs) % 8;
1327
1328         memset((char *) &facs, 0, sizeof(facs));
1329
1330         __asm__ ("      lgfr    0,%1\n"
1331                  "      stfle   %0\n"
1332                  : "=m" (facs) : "r" (lFacility) : "0", "cc");
1333 #endif
1334
1335         ss_trigger_page = mono_valloc (NULL, mono_pagesize (), MONO_MMAP_READ);
1336         bp_trigger_page = mono_valloc (NULL, mono_pagesize (), MONO_MMAP_READ);
1337         mono_mprotect (bp_trigger_page, mono_pagesize (), 0);
1338
1339         code = (guint8 *) &breakpointCode;
1340         s390_basr(code, s390_r13, 0);
1341         s390_j(code, 6);
1342         s390_llong(code, 0);
1343         s390_lg(code, s390_r13, 0, s390_r13, 4);
1344         s390_lg(code, s390_r0, 0, s390_r13, 0);
1345 }
1346
1347 /*========================= End of Function ========================*/
1348
1349 /*------------------------------------------------------------------*/
1350 /*                                                                  */
1351 /* Name         - mono_arch_cleanup.                                */
1352 /*                                                                  */
1353 /* Function     - Cleanup architecture specific code    .           */
1354 /*                                                                  */
1355 /*------------------------------------------------------------------*/
1356
1357 void
1358 mono_arch_cleanup (void)
1359 {
1360 }
1361
1362 /*========================= End of Function ========================*/
1363
1364 /*------------------------------------------------------------------*/
1365 /*                                                                  */
1366 /* Name         - mono_arch_cpu_optimizations                       */
1367 /*                                                                  */
1368 /* Function     - Returns the optimizations supported on this CPU   */
1369 /*                                                                  */
1370 /*------------------------------------------------------------------*/
1371
1372 guint32
1373 mono_arch_cpu_optimizations (guint32 *exclude_mask)
1374 {
1375         guint32 opts = 0;
1376
1377         /*----------------------------------------------------------*/
1378         /* No s390-specific optimizations yet                       */
1379         /*----------------------------------------------------------*/
1380         *exclude_mask = MONO_OPT_INLINE|MONO_OPT_LINEARS;
1381 //      *exclude_mask = MONO_OPT_INLINE;
1382         return opts;
1383 }
1384
1385 /*========================= End of Function ========================*/
1386
1387 /*------------------------------------------------------------------*/
1388 /*                                                                  */
1389 /* Name         - mono_arch_cpu_enumerate_simd_versions             */
1390 /*                                                                  */
1391 /* Function     - Returns the SIMD instruction sets on this CPU     */
1392 /*                                                                  */
1393 /*------------------------------------------------------------------*/
1394 guint32
1395 mono_arch_cpu_enumerate_simd_versions (void)
1396 {
1397         /* SIMD is currently unimplemented */
1398         return 0;
1399 }
1400 /*========================= End of Function ========================*/
1401
1402 /*------------------------------------------------------------------*/
1403 /*                                                                  */
1404 /* Name         -                                                   */
1405 /*                                                                  */
1406 /* Function     -                                                   */
1407 /*                                                                  */
1408 /*------------------------------------------------------------------*/
1409
1410 static gboolean
1411 is_regsize_var (MonoType *t) {
1412         if (t->byref)
1413                 return TRUE;
1414         switch (mono_type_get_underlying_type (t)->type) {
1415         case MONO_TYPE_I4:
1416         case MONO_TYPE_U4:
1417         case MONO_TYPE_I:
1418         case MONO_TYPE_I8:
1419         case MONO_TYPE_U8:
1420         case MONO_TYPE_U:
1421         case MONO_TYPE_PTR:
1422         case MONO_TYPE_FNPTR:
1423                 return TRUE;
1424         case MONO_TYPE_OBJECT:
1425         case MONO_TYPE_STRING:
1426         case MONO_TYPE_CLASS:
1427         case MONO_TYPE_SZARRAY:
1428         case MONO_TYPE_ARRAY:
1429                 return FALSE;
1430         case MONO_TYPE_VALUETYPE:
1431                 if (t->data.klass->enumtype)
1432                         return is_regsize_var (mono_class_enum_basetype (t->data.klass));
1433                 return FALSE;
1434         }
1435         return FALSE;
1436 }
1437
1438 /*========================= End of Function ========================*/
1439
1440 /*------------------------------------------------------------------*/
1441 /*                                                                  */
1442 /* Name         - mono_arch_get_allocatable_int_vars                */
1443 /*                                                                  */
1444 /* Function     -                                                   */
1445 /*                                                                  */
1446 /*------------------------------------------------------------------*/
1447
1448 GList *
1449 mono_arch_get_allocatable_int_vars (MonoCompile *cfg)
1450 {
1451         GList *vars = NULL;
1452         int i;
1453
1454         for (i = 0; i < cfg->num_varinfo; i++) {
1455                 MonoInst *ins = cfg->varinfo [i];
1456                 MonoMethodVar *vmv = MONO_VARINFO (cfg, i);
1457
1458                 /* unused vars */
1459                 if (vmv->range.first_use.abs_pos >= vmv->range.last_use.abs_pos)
1460                         continue;
1461
1462                 if (ins->flags & (MONO_INST_VOLATILE|MONO_INST_INDIRECT) ||
1463                     (ins->opcode != OP_LOCAL && ins->opcode != OP_ARG))
1464                         continue;
1465
1466                 /* we can only allocate 32 bit values */
1467                 if (is_regsize_var (ins->inst_vtype)) {
1468                         g_assert (MONO_VARINFO (cfg, i)->reg == -1);
1469                         g_assert (i == vmv->idx);
1470                         vars = mono_varlist_insert_sorted (cfg, vars, vmv, FALSE);
1471                 }
1472         }
1473
1474         return vars;
1475 }
1476
1477 /*========================= End of Function ========================*/
1478
1479 /*------------------------------------------------------------------*/
1480 /*                                                                  */
1481 /* Name         - mono_arch_global_int_regs                         */
1482 /*                                                                  */
1483 /* Function     - Return a list of usable integer registers.        */
1484 /*                                                                  */
1485 /*------------------------------------------------------------------*/
1486
1487 GList *
1488 mono_arch_get_global_int_regs (MonoCompile *cfg)
1489 {
1490         GList *regs = NULL;
1491         MonoMethodHeader *header;
1492         int i, top = 13;
1493
1494         header = cfg->header;
1495         if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
1496                 cfg->frame_reg = s390_r11;
1497
1498
1499         /* FIXME: s390_r12 is reserved for bkchain_reg. Only reserve it if needed */
1500         top = 12;
1501         for (i = 8; i < top; ++i) {
1502                 if (cfg->frame_reg != i)
1503                         regs = g_list_prepend (regs, GUINT_TO_POINTER (i));
1504         }
1505
1506         return regs;
1507 }
1508
1509 /*========================= End of Function ========================*/
1510
1511 /*------------------------------------------------------------------*/
1512 /*                                                                  */
1513 /* Name         -  mono_arch_flush_icache                           */
1514 /*                                                                  */
1515 /* Function     -  Flush the CPU icache.                            */
1516 /*                                                                  */
1517 /*------------------------------------------------------------------*/
1518
1519 void
1520 mono_arch_flush_icache (guint8 *code, gint size)
1521 {
1522 }
1523
1524 /*========================= End of Function ========================*/
1525
1526 /*------------------------------------------------------------------*/
1527 /*                                                                  */
1528 /* Name         - add_general                                       */
1529 /*                                                                  */
1530 /* Function     - Determine code and stack size incremements for a  */
1531 /*                parameter.                                        */
1532 /*                                                                  */
1533 /*------------------------------------------------------------------*/
1534
1535 static void inline
1536 add_general (guint *gr, size_data *sz, ArgInfo *ainfo)
1537 {
1538         if (*gr > S390_LAST_ARG_REG) {
1539                 sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1540                 ainfo->offset   = sz->stack_size;
1541                 ainfo->reg      = STK_BASE;
1542                 ainfo->regtype  = RegTypeBase;
1543                 sz->stack_size += sizeof(long);
1544                 sz->local_size += sizeof(long);
1545                 sz->offStruct  += sizeof(long);
1546                 sz->code_size  += 12;
1547         } else {
1548                 ainfo->reg      = *gr;
1549                 sz->code_size  += 8;
1550         }
1551         (*gr) ++;
1552 }
1553
1554 /*========================= End of Function ========================*/
1555
1556 /*------------------------------------------------------------------*/
1557 /*                                                                  */
1558 /* Name         - add_stackParm                                     */
1559 /*                                                                  */
1560 /* Function     - Determine code and stack size incremements for a  */
1561 /*                parameter.                                        */
1562 /*                                                                  */
1563 /*------------------------------------------------------------------*/
1564
1565 static void inline
1566 add_stackParm (guint *gr, size_data *sz, ArgInfo *ainfo, gint size)
1567 {
1568         if (*gr > S390_LAST_ARG_REG) {
1569                 sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1570                 ainfo->reg          = STK_BASE;
1571                 ainfo->offset   = sz->stack_size;
1572                 ainfo->regtype  = RegTypeStructByAddrOnStack;
1573                 sz->stack_size += sizeof (gpointer);
1574                 sz->parm_size  += sizeof(gpointer);
1575                 sz->offStruct  += sizeof(gpointer);
1576         } else {
1577                 ainfo->reg      = *gr;
1578                 ainfo->offset   = sz->stack_size;
1579                 ainfo->regtype  = RegTypeStructByAddr;
1580         }
1581         (*gr) ++;
1582         ainfo->offparm  = sz->offset;
1583         sz->offset      = S390_ALIGN(sz->offset+size, sizeof(long));
1584         ainfo->size     = size;
1585         ainfo->vtsize   = size;
1586         sz->parm_size  += size;
1587 }
1588
1589 /*========================= End of Function ========================*/
1590
1591 /*------------------------------------------------------------------*/
1592 /*                                                                  */
1593 /* Name         - add_float                                         */
1594 /*                                                                  */
1595 /* Function     - Determine code and stack size incremements for a  */
1596 /*                float parameter.                                  */
1597 /*                                                                  */
1598 /*------------------------------------------------------------------*/
1599
1600 static void inline
1601 add_float (guint *fr,  size_data *sz, ArgInfo *ainfo)
1602 {
1603         if ((*fr) <= S390_LAST_FPARG_REG) {
1604                 ainfo->regtype = RegTypeFP;
1605                 ainfo->reg     = *fr;
1606                 sz->code_size += 4;
1607                 (*fr) += 2;
1608         }
1609         else {
1610                 ainfo->offset   = sz->stack_size;
1611                 ainfo->reg      = STK_BASE;
1612                 ainfo->regtype  = RegTypeBase;
1613                 sz->code_size  += 4;
1614                 sz->stack_size += sizeof(double);
1615                 sz->local_size += sizeof(double);
1616                 sz->offStruct  += sizeof(double);
1617         }
1618 }
1619
1620 /*========================= End of Function ========================*/
1621
1622 /*------------------------------------------------------------------*/
1623 /*                                                                  */
1624 /* Name         - get_call_info                                     */
1625 /*                                                                  */
1626 /* Function     - Determine the amount of space required for code   */
1627 /*                and stack. In addition determine starting points  */
1628 /*                for stack-based parameters, and area for struct-  */
1629 /*                ures being returned on the stack.                 */
1630 /*                                                                  */
1631 /*------------------------------------------------------------------*/
1632
1633 static CallInfo *
1634 get_call_info (MonoCompile *cfg, MonoMemPool *mp, MonoMethodSignature *sig)
1635 {
1636         guint i, fr, gr, size, pstart;
1637         int nParm = sig->hasthis + sig->param_count;
1638         MonoType *ret_type;
1639         guint32 simpleType, align;
1640         gboolean is_pinvoke = sig->pinvoke;
1641         CallInfo *cinfo;
1642         size_data *sz;
1643         MonoGenericSharingContext *gsctx = cfg ? cfg->generic_sharing_context : NULL;
1644
1645         if (mp)
1646                 cinfo = mono_mempool_alloc0 (mp, sizeof (CallInfo) + sizeof (ArgInfo) * nParm);
1647         else
1648                 cinfo = g_malloc0 (sizeof (CallInfo) + sizeof (ArgInfo) * nParm);
1649
1650         fr                = 0;
1651         gr                = s390_r2;
1652         nParm             = 0;
1653         cinfo->struct_ret = 0;
1654         sz                = &cinfo->sz;
1655         sz->retStruct     = 0;
1656         sz->offset        = 0;
1657         sz->offStruct     = S390_MINIMAL_STACK_SIZE;
1658         sz->stack_size    = S390_MINIMAL_STACK_SIZE;
1659         sz->code_size     = 0;
1660         sz->parm_size     = 0;
1661         sz->local_size    = 0;
1662         align             = 0;
1663         size              = 0;
1664
1665         /*----------------------------------------------------------*/
1666         /* We determine the size of the return code/stack in case we*/
1667         /* need to reserve a register to be used to address a stack */
1668         /* area that the callee will use.                           */
1669         /*----------------------------------------------------------*/
1670
1671         ret_type = mini_type_get_underlying_type (gsctx, sig->ret);
1672         ret_type = mini_get_basic_type_from_generic (gsctx, ret_type);
1673         simpleType = ret_type->type;
1674 enum_retvalue:
1675         switch (simpleType) {
1676                 case MONO_TYPE_BOOLEAN:
1677                 case MONO_TYPE_I1:
1678                 case MONO_TYPE_U1:
1679                 case MONO_TYPE_I2:
1680                 case MONO_TYPE_U2:
1681                 case MONO_TYPE_CHAR:
1682                 case MONO_TYPE_I4:
1683                 case MONO_TYPE_U4:
1684                 case MONO_TYPE_I:
1685                 case MONO_TYPE_U:
1686                 case MONO_TYPE_CLASS:
1687                 case MONO_TYPE_OBJECT:
1688                 case MONO_TYPE_SZARRAY:
1689                 case MONO_TYPE_ARRAY:
1690                 case MONO_TYPE_PTR:
1691                 case MONO_TYPE_FNPTR:
1692                 case MONO_TYPE_STRING:
1693                         cinfo->ret.reg = s390_r2;
1694                         sz->code_size += 4;
1695                         break;
1696                 case MONO_TYPE_R4:
1697                 case MONO_TYPE_R8:
1698                         cinfo->ret.reg = s390_f0;
1699                         sz->code_size += 4;
1700                         break;
1701                 case MONO_TYPE_I8:
1702                 case MONO_TYPE_U8:
1703                         cinfo->ret.reg = s390_r2;
1704                         sz->code_size += 4;
1705                         break;
1706                 case MONO_TYPE_GENERICINST:
1707                         if (!mono_type_generic_inst_is_valuetype (sig->ret)) {
1708                                 cinfo->ret.reg = s390_r2;
1709                                 sz->code_size += 4;
1710                                 break;
1711                         }
1712                         /* Fall through */
1713                 case MONO_TYPE_VALUETYPE: {
1714                         MonoClass *klass = mono_class_from_mono_type (sig->ret);
1715                         if (klass->enumtype) {
1716                                 simpleType = mono_class_enum_basetype (klass)->type;
1717                                 goto enum_retvalue;
1718                         }
1719                         size = mini_type_stack_size_full (gsctx, &klass->byval_arg, NULL, sig->pinvoke);
1720
1721                         cinfo->struct_ret = 1;
1722                         cinfo->ret.size   = size;
1723                         cinfo->ret.vtsize = size;
1724                         break;
1725                 }
1726                 case MONO_TYPE_TYPEDBYREF:
1727                         size = sizeof (MonoTypedRef);
1728                         cinfo->struct_ret = 1;
1729                         cinfo->ret.size   = size;
1730                         cinfo->ret.vtsize = size;
1731                         break;
1732                 case MONO_TYPE_VOID:
1733                         break;
1734                 default:
1735                         g_error ("Can't handle as return value 0x%x", sig->ret->type);
1736         }
1737
1738
1739         pstart = 0;
1740         /*
1741          * To simplify get_this_arg_reg () and LLVM integration, emit the vret arg after
1742          * the first argument, allowing 'this' to be always passed in the first arg reg.
1743          * Also do this if the first argument is a reference type, since virtual calls
1744          * are sometimes made using calli without sig->hasthis set, like in the delegate
1745          * invoke wrappers.
1746          */
1747         if (cinfo->struct_ret && !is_pinvoke &&
1748             (sig->hasthis ||
1749              (sig->param_count > 0 &&
1750               MONO_TYPE_IS_REFERENCE (mini_type_get_underlying_type (gsctx, sig->params [0]))))) {
1751                 if (sig->hasthis) {
1752                         cinfo->args[nParm].size = sizeof (gpointer);
1753                         add_general (&gr, sz, cinfo->args + nParm);
1754                 } else {
1755                         cinfo->args[nParm].size = sizeof (gpointer);
1756                         add_general (&gr, sz, &cinfo->args [sig->hasthis + nParm]);
1757                         pstart = 1;
1758                 }
1759                 nParm ++;
1760                 cinfo->vret_arg_index = 1;
1761                 cinfo->ret.reg = gr;
1762                 gr ++;
1763         } else {
1764                 /* this */
1765                 if (sig->hasthis) {
1766                         cinfo->args[nParm].size = sizeof (gpointer);
1767                         add_general (&gr, sz, cinfo->args + nParm);
1768                         nParm ++;
1769                 }
1770
1771                 if (cinfo->struct_ret) {
1772                         cinfo->ret.reg = gr;
1773                         gr ++;
1774                 }
1775         }
1776
1777         if ((sig->call_convention == MONO_CALL_VARARG) && (sig->param_count == 0)) {
1778                 gr = S390_LAST_ARG_REG + 1;
1779                 fr = S390_LAST_FPARG_REG + 1;
1780
1781                 /* Emit the signature cookie just before the implicit arguments */
1782                 add_general (&gr, sz, &cinfo->sigCookie);
1783         }
1784
1785         /*----------------------------------------------------------*/
1786         /* We determine the size of the parameter code and stack    */
1787         /* requirements by checking the types and sizes of the      */
1788         /* parameters.                                              */
1789         /*----------------------------------------------------------*/
1790
1791         for (i = pstart; i < sig->param_count; ++i) {
1792                 MonoType *ptype;
1793
1794                 /*--------------------------------------------------*/
1795                 /* Handle vararg type calls. All args are put on    */
1796                 /* the stack.                                       */
1797                 /*--------------------------------------------------*/
1798                 if ((sig->call_convention == MONO_CALL_VARARG) &&
1799                     (i == sig->sentinelpos)) {
1800                         gr = S390_LAST_ARG_REG + 1;
1801                         fr = S390_LAST_FPARG_REG + 1;
1802                         add_general (&gr, sz, &cinfo->sigCookie);
1803                 }
1804
1805                 if (sig->params [i]->byref) {
1806                         add_general (&gr, sz, cinfo->args+nParm);
1807                         cinfo->args[nParm].size = sizeof(gpointer);
1808                         nParm++;
1809                         continue;
1810                 }
1811
1812                 ptype = mini_type_get_underlying_type (gsctx, sig->params [i]);
1813                 simpleType = ptype->type;
1814                 cinfo->args[nParm].type = simpleType;
1815                 switch (simpleType) {
1816                 case MONO_TYPE_BOOLEAN:
1817                 case MONO_TYPE_I1:
1818                 case MONO_TYPE_U1:
1819                         cinfo->args[nParm].size = sizeof(char);
1820                         add_general (&gr, sz, cinfo->args+nParm);
1821                         nParm++;
1822                         break;
1823                 case MONO_TYPE_I2:
1824                 case MONO_TYPE_U2:
1825                 case MONO_TYPE_CHAR:
1826                         cinfo->args[nParm].size = sizeof(short);
1827                         add_general (&gr, sz, cinfo->args+nParm);
1828                         nParm++;
1829                         break;
1830                 case MONO_TYPE_I4:
1831                 case MONO_TYPE_U4:
1832                         cinfo->args[nParm].size = sizeof(int);
1833                         add_general (&gr, sz, cinfo->args+nParm);
1834                         nParm++;
1835                         break;
1836                 case MONO_TYPE_I:
1837                 case MONO_TYPE_U:
1838                 case MONO_TYPE_PTR:
1839                 case MONO_TYPE_FNPTR:
1840                 case MONO_TYPE_CLASS:
1841                 case MONO_TYPE_OBJECT:
1842                 case MONO_TYPE_STRING:
1843                 case MONO_TYPE_SZARRAY:
1844                 case MONO_TYPE_ARRAY:
1845                         cinfo->args[nParm].size = sizeof(gpointer);
1846                         add_general (&gr, sz, cinfo->args+nParm);
1847                         nParm++;
1848                         break;
1849                 case MONO_TYPE_I8:
1850                 case MONO_TYPE_U8:
1851                         cinfo->args[nParm].size = sizeof(long long);
1852                         add_general (&gr, sz, cinfo->args+nParm);
1853                         nParm++;
1854                         break;
1855                 case MONO_TYPE_R4:
1856                         cinfo->args[nParm].size = sizeof(float);
1857                         add_float (&fr, sz, cinfo->args+nParm);
1858                         nParm++;
1859                         break;
1860                 case MONO_TYPE_R8:
1861                         cinfo->args[nParm].size = sizeof(double);
1862                         add_float (&fr, sz, cinfo->args+nParm);
1863                         nParm++;
1864                         break;
1865                 case MONO_TYPE_GENERICINST:
1866                         if (!mono_type_generic_inst_is_valuetype (ptype)) {
1867                                 cinfo->args[nParm].size = sizeof(gpointer);
1868                                 add_general (&gr, sz, cinfo->args+nParm);
1869                                 nParm++;
1870                                 break;
1871                         }
1872                         /* Fall through */
1873                 case MONO_TYPE_VALUETYPE: {
1874                         MonoMarshalType *info;
1875                         MonoClass *klass = mono_class_from_mono_type (ptype);
1876
1877                         size = mini_type_stack_size_full(gsctx, &klass->byval_arg, NULL, sig->pinvoke);
1878                         if (simpleType != MONO_TYPE_GENERICINST) {
1879                                 info = mono_marshal_load_type_info(klass);
1880
1881                                 if ((info->native_size == sizeof(float)) &&
1882                                     (info->num_fields  == 1) &&
1883                                     (info->fields[0].field->type->type == MONO_TYPE_R4)) {
1884                                         cinfo->args[nParm].size = sizeof(float);
1885                                         add_float(&fr, sz, cinfo->args+nParm);
1886                                         nParm ++;
1887                                         break;
1888                                 }
1889
1890                                 if ((info->native_size == sizeof(double)) &&
1891                                     (info->num_fields  == 1) &&
1892                                     (info->fields[0].field->type->type == MONO_TYPE_R8)) {
1893                                         cinfo->args[nParm].size = sizeof(double);
1894                                         add_float(&fr, sz, cinfo->args+nParm);
1895                                         nParm ++;
1896                                         break;
1897                                 }
1898                         }
1899
1900                         cinfo->args[nParm].vtsize  = 0;
1901                         cinfo->args[nParm].size    = 0;
1902
1903                         switch (size) {
1904                                 /*----------------------------------*/
1905                                 /* On S/390, structures of size 1,  */
1906                                 /* 2, 4, and 8 bytes are passed in  */
1907                                 /* (a) register(s).                 */
1908                                 /*----------------------------------*/
1909                                 case 0:
1910                                 case 1:
1911                                 case 2:
1912                                 case 4:
1913                                 case 8:
1914                                         add_general(&gr, sz, cinfo->args+nParm);
1915                                         cinfo->args[nParm].size    = size;
1916                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1917                                         nParm++;
1918                                         sz->local_size            += sizeof(long);
1919                                         break;
1920                                 default:
1921                                         add_stackParm(&gr, sz, cinfo->args+nParm, size);
1922                                         nParm++;
1923                         }
1924                 }
1925                         break;
1926                 case MONO_TYPE_TYPEDBYREF: {
1927                         int size = sizeof (MonoTypedRef);
1928
1929                         cinfo->args[nParm].vtsize  = 0;
1930                         cinfo->args[nParm].size    = 0;
1931
1932                         switch (size) {
1933                                 /*----------------------------------*/
1934                                 /* On S/390, structures of size 1,  */
1935                                 /* 2, 4, and 8 bytes are passed in  */
1936                                 /* (a) register(s).                 */
1937                                 /*----------------------------------*/
1938                                 case 0:
1939                                 case 1:
1940                                 case 2:
1941                                 case 4:
1942                                 case 8:
1943                                         add_general(&gr, sz, cinfo->args+nParm);
1944                                         cinfo->args[nParm].size    = size;
1945                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1946                                         nParm++;
1947                                         sz->local_size            += sizeof(long);
1948                                         break;
1949                                 default:
1950                                         add_stackParm(&gr, sz, cinfo->args+nParm, size);
1951                                         nParm++;
1952                         }
1953                 }
1954                         break;
1955                 default:
1956                         g_error ("Can't trampoline 0x%x", ptype);
1957                 }
1958         }
1959
1960         /*----------------------------------------------------------*/
1961         /* Handle the case where there are no implicit arguments    */
1962         /*----------------------------------------------------------*/
1963         if ((sig->call_convention == MONO_CALL_VARARG) &&
1964             (nParm > 0) &&
1965             (!sig->pinvoke) &&
1966             (sig->param_count == sig->sentinelpos)) {
1967                 gr = S390_LAST_ARG_REG + 1;
1968                 fr = S390_LAST_FPARG_REG + 1;
1969                 add_general (&gr, sz, &cinfo->sigCookie);
1970         }
1971
1972         /*----------------------------------------------------------*/
1973         /* If we are passing a structure back then if it won't be   */
1974         /* in a register(s) then we make room at the end of the     */
1975         /* parameters that may have been placed on the stack        */
1976         /*----------------------------------------------------------*/
1977         if (cinfo->struct_ret) {
1978                 cinfo->ret.offset = sz->stack_size;
1979                 switch (cinfo->ret.size) {
1980                 case 0:
1981                 case 1:
1982                 case 2:
1983                 case 4:
1984                 case 8:
1985                         break;
1986                 default:
1987                         sz->stack_size   += S390_ALIGN(cinfo->ret.size, align);
1988                 }
1989         }
1990
1991         cinfo->lastgr   = gr;
1992         sz->stack_size  = sz->stack_size + sz->local_size + sz->parm_size +
1993                           sz->offset;
1994         sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1995
1996         return (cinfo);
1997 }
1998
1999 /*========================= End of Function ========================*/
2000
2001 /*------------------------------------------------------------------*/
2002 /*                                                                  */
2003 /* Name         - mono_arch_allocate_vars                           */
2004 /*                                                                  */
2005 /* Function     - Set var information according to the calling      */
2006 /*                convention for S/390. The local var stuff should  */
2007 /*                most likely be split in another method.           */
2008 /*                                                                  */
2009 /* Parameter    - @m - Compile unit.                                */
2010 /*                                                                  */
2011 /*------------------------------------------------------------------*/
2012
2013 void
2014 mono_arch_allocate_vars (MonoCompile *cfg)
2015 {
2016         MonoMethodSignature *sig;
2017         MonoMethodHeader *header;
2018         MonoInst *inst;
2019         CallInfo *cinfo;
2020         int iParm, iVar, offset, align, size, curinst;
2021         int frame_reg = STK_BASE;
2022         int sArg, eArg;
2023
2024         header  = cfg->header;
2025
2026         cfg->flags |= MONO_CFG_HAS_SPILLUP;
2027
2028         /*---------------------------------------------------------*/
2029         /* We use the frame register also for any method that has  */
2030         /* filter clauses. This way, when the handlers are called, */
2031         /* the code will reference local variables using the frame */
2032         /* reg instead of the stack pointer: if we had to restore  */
2033         /* the stack pointer, we'd corrupt the method frames that  */
2034         /* are already on the stack (since filters get called      */
2035         /* before stack unwinding happens) when the filter code    */
2036         /* would call any method.                                  */
2037         /*---------------------------------------------------------*/
2038         if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
2039                 frame_reg = s390_r11;
2040
2041         cfg->frame_reg = frame_reg;
2042
2043         cfg->arch.bkchain_reg = -1;
2044
2045         if (frame_reg != STK_BASE)
2046                 cfg->used_int_regs |= 1 << frame_reg;
2047
2048         sig     = mono_method_signature (cfg->method);
2049
2050         cinfo   = get_call_info (cfg, cfg->mempool, sig);
2051
2052         if (!cinfo->struct_ret) {
2053                 switch (mono_type_get_underlying_type (sig->ret)->type) {
2054                 case MONO_TYPE_VOID:
2055                         break;
2056                 default:
2057                         cfg->ret->opcode = OP_REGVAR;
2058                         cfg->ret->dreg   = s390_r2;
2059                         break;
2060                 }
2061         }
2062
2063         /*--------------------------------------------------------------*/
2064         /* local vars are at a positive offset from the stack pointer   */
2065         /* also note that if the function uses alloca, we use s390_r11  */
2066         /* to point at the local variables.                             */
2067         /* add parameter area size for called functions                 */
2068         /*--------------------------------------------------------------*/
2069         if (cfg->param_area == 0)
2070                 offset = S390_MINIMAL_STACK_SIZE;
2071         else
2072                 offset = cfg->param_area;
2073
2074         cfg->sig_cookie = 0;
2075
2076         if (cinfo->struct_ret) {
2077                 inst               = cfg->vret_addr;
2078                 offset             = S390_ALIGN(offset, sizeof(gpointer));
2079                 inst->inst_offset  = offset;
2080                 inst->opcode       = OP_REGOFFSET;
2081                 inst->inst_basereg = frame_reg;
2082                 offset            += sizeof(gpointer);
2083                 if (G_UNLIKELY (cfg->verbose_level > 1)) {
2084                         printf ("vret_addr =");
2085                         mono_print_ins (cfg->vret_addr);
2086                 }
2087         }
2088
2089         if (sig->hasthis) {
2090                 inst = cfg->args [0];
2091                 if (inst->opcode != OP_REGVAR) {
2092                         inst->opcode       = OP_REGOFFSET;
2093                         inst->inst_basereg = frame_reg;
2094                         offset             = S390_ALIGN(offset, sizeof(gpointer));
2095                         inst->inst_offset  = offset;
2096                         offset            += sizeof (gpointer);
2097                 }
2098                 curinst = sArg = 1;
2099         } else {
2100                 curinst = sArg = 0;
2101         }
2102
2103         eArg = sig->param_count + sArg;
2104
2105         if (sig->call_convention == MONO_CALL_VARARG)
2106                 cfg->sig_cookie += S390_MINIMAL_STACK_SIZE;
2107
2108         for (iParm = sArg; iParm < eArg; ++iParm) {
2109                 inst = cfg->args [curinst];
2110                 if (inst->opcode != OP_REGVAR) {
2111                         switch (cinfo->args[iParm].regtype) {
2112                         case RegTypeStructByAddr : {
2113                                 MonoInst *indir;
2114
2115                                 size = sizeof (gpointer);
2116
2117                                 inst->opcode       = OP_REGOFFSET;
2118                                 inst->inst_basereg = frame_reg;
2119                                 offset             = S390_ALIGN (offset, sizeof (gpointer));
2120                                 inst->inst_offset  = offset;
2121
2122                                 /* Add a level of indirection */
2123                                 MONO_INST_NEW (cfg, indir, 0);
2124                                 *indir          = *inst;
2125                                 inst->opcode    = OP_VTARG_ADDR;
2126                                 inst->inst_left = indir;
2127                         }
2128                                 break;
2129                         case RegTypeStructByAddrOnStack : {
2130                                 MonoInst *indir;
2131
2132                                 size = sizeof (gpointer);
2133
2134                                 /* Similar to the == STK_BASE case below */
2135                                 cfg->arch.bkchain_reg = s390_r12;
2136                                 cfg->used_int_regs |= 1 << cfg->arch.bkchain_reg;
2137
2138                                 inst->opcode = OP_REGOFFSET;
2139                                 inst->dreg = mono_alloc_preg (cfg);
2140                                 inst->inst_basereg = cfg->arch.bkchain_reg;
2141                                 inst->inst_offset = cinfo->args [iParm].offset;
2142
2143                                 /* Add a level of indirection */
2144                                 MONO_INST_NEW (cfg, indir, 0);
2145                                 *indir = *inst;
2146                                 inst->opcode = OP_VTARG_ADDR;
2147                                 inst->inst_left = indir;
2148                                 break;
2149                         }
2150                         case RegTypeStructByVal :
2151                                 size               = cinfo->args[iParm].size;
2152                                 offset             = S390_ALIGN(offset, size);
2153                                 inst->opcode       = OP_REGOFFSET;
2154                                 inst->inst_basereg = frame_reg;
2155                                 inst->inst_offset  = offset;
2156                                 break;
2157                         default :
2158                                 if (cinfo->args [iParm].reg == STK_BASE) {
2159                                         /*
2160                                          * These arguments are in the previous frame, so we can't
2161                                          * compute their offset from the current frame pointer right
2162                                          * now, since cfg->stack_offset is not yet known, so dedicate a
2163                                          * register holding the previous frame pointer.
2164                                          */
2165                                         cfg->arch.bkchain_reg = s390_r12;
2166                                         cfg->used_int_regs |= 1 << cfg->arch.bkchain_reg;
2167
2168                                         inst->opcode       = OP_REGOFFSET;
2169                                         inst->inst_basereg = cfg->arch.bkchain_reg;
2170                                         size               = (cinfo->args[iParm].size < 8
2171                                                                           ? 8 - cinfo->args[iParm].size
2172                                                                           : 0);
2173                                         inst->inst_offset  = cinfo->args [iParm].offset + size;
2174                                         size = sizeof (long);
2175                                 } else {
2176                                         inst->opcode       = OP_REGOFFSET;
2177                                         inst->inst_basereg = frame_reg;
2178                                         size               = (cinfo->args[iParm].size < 8
2179                                                                           ? sizeof(int)
2180                                                                           : sizeof(long));
2181                                         offset             = S390_ALIGN(offset, size);
2182                                         if (cfg->method->wrapper_type == MONO_WRAPPER_MANAGED_TO_NATIVE)
2183                                                 inst->inst_offset  = offset;
2184                                         else
2185                                                 inst->inst_offset  = offset + (8 - size);
2186                                 }
2187                                 break;
2188                         }
2189 #if 0
2190                         if ((sig->call_convention == MONO_CALL_VARARG) &&
2191                             (cinfo->args[iParm].regtype != RegTypeGeneral) &&
2192                             (iParm < sig->sentinelpos))
2193                                 cfg->sig_cookie += size;
2194 printf("%s %4d cookine %x\n",__FUNCTION__,__LINE__,cfg->sig_cookie);
2195 #endif
2196
2197                         offset += MAX(size, 8);
2198                 }
2199                 curinst++;
2200         }
2201
2202         cfg->locals_min_stack_offset = offset;
2203
2204         curinst = cfg->locals_start;
2205         for (iVar = curinst; iVar < cfg->num_varinfo; ++iVar) {
2206                 inst = cfg->varinfo [iVar];
2207                 if ((inst->flags & MONO_INST_IS_DEAD) ||
2208                     (inst->opcode == OP_REGVAR))
2209                         continue;
2210
2211                 /*--------------------------------------------------*/
2212                 /* inst->backend.is_pinvoke indicates native sized  */
2213                 /* value typs this is used by the pinvoke wrappers  */
2214                 /* when they call functions returning structure     */
2215                 /*--------------------------------------------------*/
2216                 if (inst->backend.is_pinvoke && MONO_TYPE_ISSTRUCT (inst->inst_vtype))
2217                         size = mono_class_native_size (mono_class_from_mono_type(inst->inst_vtype),
2218                                                        (guint32 *) &align);
2219                 else
2220                         size = mono_type_size (inst->inst_vtype, &align);
2221
2222                 offset             = S390_ALIGN(offset, align);
2223                 inst->inst_offset  = offset;
2224                 inst->opcode       = OP_REGOFFSET;
2225                 inst->inst_basereg = frame_reg;
2226                 offset            += size;
2227                 DEBUG (g_print("allocating local %d to %ld, size: %d\n",
2228                                 iVar, inst->inst_offset, size));
2229         }
2230
2231         cfg->locals_max_stack_offset = offset;
2232
2233         /*------------------------------------------------------*/
2234         /* Allow space for the trace method stack area if needed*/
2235         /*------------------------------------------------------*/
2236         if ((mono_jit_trace_calls != NULL && mono_trace_eval (cfg->method))
2237             || (cfg->prof_options & MONO_PROFILE_ENTER_LEAVE))
2238                 offset += S390_TRACE_STACK_SIZE;
2239
2240         /*------------------------------------------------------*/
2241         /* Reserve space to save LMF and caller saved registers */
2242         /*------------------------------------------------------*/
2243         if (cfg->method->save_lmf)
2244                 offset += sizeof (MonoLMF);
2245
2246         /*------------------------------------------------------*/
2247         /* align the offset                                     */
2248         /*------------------------------------------------------*/
2249         cfg->stack_offset = S390_ALIGN(offset, S390_STACK_ALIGNMENT);
2250
2251         /*------------------------------------------------------*/
2252         /* Fix offsets for args whose value is in parent frame  */
2253         /*------------------------------------------------------*/
2254         for (iParm = sArg; iParm < eArg; ++iParm) {
2255                 inst = cfg->args [iParm];
2256
2257                 if (inst->opcode == OP_S390_STKARG) {
2258                         inst->opcode = OP_REGOFFSET;
2259                         inst->inst_offset += cfg->stack_offset;
2260                 }
2261         }
2262 }
2263
2264 /*========================= End of Function ========================*/
2265
2266 /*------------------------------------------------------------------*/
2267 /*                                                                  */
2268 /* Name         - mono_arch_create_vars                             */
2269 /*                                                                  */
2270 /*------------------------------------------------------------------*/
2271
2272 void
2273 mono_arch_create_vars (MonoCompile *cfg)
2274 {
2275         MonoMethodSignature *sig;
2276         CallInfo *cinfo;
2277
2278         sig = mono_method_signature (cfg->method);
2279
2280         cinfo = get_call_info (cfg, cfg->mempool, sig);
2281
2282         if (cinfo->struct_ret) {
2283                 cfg->vret_addr = mono_compile_create_var (cfg, &mono_defaults.int_class->byval_arg, OP_ARG);
2284                 if (G_UNLIKELY (cfg->verbose_level > 1)) {
2285                         printf ("vret_addr = ");
2286                         mono_print_ins (cfg->vret_addr);
2287                 }
2288         }
2289 }
2290
2291 /*========================= End of Function ========================*/
2292
2293 /*------------------------------------------------------------------*/
2294 /*                                                                  */
2295 /* Name         - add_outarg_reg2.                                  */
2296 /*                                                                  */
2297 /*------------------------------------------------------------------*/
2298
2299 static void
2300 add_outarg_reg2 (MonoCompile *cfg, MonoCallInst *call, ArgStorage storage, int reg, MonoInst *tree)
2301 {
2302         MonoInst *ins;
2303
2304         switch (storage) {
2305         case RegTypeGeneral:
2306                 MONO_INST_NEW (cfg, ins, OP_MOVE);
2307                 ins->dreg = mono_alloc_ireg (cfg);
2308                 ins->sreg1 = tree->dreg;
2309                 MONO_ADD_INS (cfg->cbb, ins);
2310                 mono_call_inst_add_outarg_reg (cfg, call, ins->dreg, reg, FALSE);
2311                 break;
2312         case RegTypeFP:
2313                 MONO_INST_NEW (cfg, ins, OP_FMOVE);
2314                 ins->dreg = mono_alloc_freg (cfg);
2315                 ins->sreg1 = tree->dreg;
2316                 MONO_ADD_INS (cfg->cbb, ins);
2317                 mono_call_inst_add_outarg_reg (cfg, call, ins->dreg, reg, TRUE);
2318                 break;
2319         case RegTypeFPR4:
2320                 MONO_INST_NEW (cfg, ins, OP_S390_SETF4RET);
2321                 ins->dreg = mono_alloc_freg (cfg);
2322                 ins->sreg1 = tree->dreg;
2323                 MONO_ADD_INS (cfg->cbb, ins);
2324                 mono_call_inst_add_outarg_reg (cfg, call, ins->dreg, reg, TRUE);
2325                 break;
2326         default:
2327                 g_assert_not_reached ();
2328         }
2329 }
2330
2331 /*========================= End of Function ========================*/
2332
2333 /*------------------------------------------------------------------*/
2334 /*                                                                  */
2335 /* Name         - emit_sig_cookie.                                  */
2336 /*                                                                  */
2337 /*------------------------------------------------------------------*/
2338
2339 static void
2340 emit_sig_cookie (MonoCompile *cfg, MonoCallInst *call, CallInfo *cinfo)
2341 {
2342         MonoMethodSignature *tmpSig;
2343         MonoInst *sig_arg;
2344
2345         cfg->disable_aot = TRUE;
2346
2347         /*----------------------------------------------------------*/
2348         /* mono_ArgIterator_Setup assumes the signature cookie is   */
2349         /* passed first and all the arguments which were before it  */
2350         /* passed on the stack after the signature. So compensate   */
2351         /* by passing a different signature.                        */
2352         /*----------------------------------------------------------*/
2353         tmpSig = mono_metadata_signature_dup (call->signature);
2354         tmpSig->param_count -= call->signature->sentinelpos;
2355         tmpSig->sentinelpos  = 0;
2356         if (tmpSig->param_count > 0)
2357                 memcpy (tmpSig->params,
2358                         call->signature->params + call->signature->sentinelpos,
2359                         tmpSig->param_count * sizeof(MonoType *));
2360
2361         MONO_INST_NEW (cfg, sig_arg, OP_ICONST);
2362         sig_arg->dreg = mono_alloc_ireg (cfg);
2363         sig_arg->inst_p0 = tmpSig;
2364         MONO_ADD_INS (cfg->cbb, sig_arg);
2365
2366         MONO_EMIT_NEW_STORE_MEMBASE (cfg, OP_STORE_MEMBASE_REG, STK_BASE,
2367                                      cinfo->sigCookie.offset, sig_arg->dreg);
2368 }
2369
2370 /*========================= End of Function ========================*/
2371
2372 /*------------------------------------------------------------------*/
2373 /*                                                                  */
2374 /* Name         - mono_arch_emit_call                               */
2375 /*                                                                  */
2376 /*------------------------------------------------------------------*/
2377
2378 void
2379 mono_arch_emit_call (MonoCompile *cfg, MonoCallInst *call)
2380 {
2381         MonoInst *in;
2382         MonoMethodSignature *sig;
2383         MonoInst *ins;
2384         int i, n, lParamArea;
2385         CallInfo *cinfo;
2386         ArgInfo *ainfo = NULL;
2387         int stackSize;
2388         MonoMethodHeader *header;
2389         int frmReg;
2390
2391         sig = call->signature;
2392         n = sig->param_count + sig->hasthis;
2393         DEBUG (g_print ("Call requires: %d parameters\n",n));
2394
2395         cinfo = get_call_info (cfg, cfg->mempool, sig);
2396
2397         stackSize         = cinfo->sz.stack_size + cinfo->sz.local_size +
2398                             cinfo->sz.parm_size + cinfo->sz.offset;
2399         call->stack_usage = MAX(stackSize, call->stack_usage);
2400         lParamArea        = MAX((call->stack_usage-S390_MINIMAL_STACK_SIZE-cinfo->sz.parm_size), 0);
2401         cfg->param_area   = MAX(((signed) cfg->param_area), lParamArea);
2402         cfg->flags       |= MONO_CFG_HAS_CALLS;
2403
2404         if (cinfo->struct_ret) {
2405                 MONO_INST_NEW (cfg, ins, OP_MOVE);
2406                 ins->sreg1 = call->vret_var->dreg;
2407                 ins->dreg = mono_alloc_preg (cfg);
2408                 MONO_ADD_INS (cfg->cbb, ins);
2409                 mono_call_inst_add_outarg_reg (cfg, call, ins->dreg, cinfo->ret.reg, FALSE);
2410         }
2411
2412         header = cfg->header;
2413         if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
2414                 frmReg = s390_r11;
2415         else
2416                 frmReg = STK_BASE;
2417
2418         for (i = 0; i < n; ++i) {
2419                 MonoType *t;
2420
2421                 ainfo = cinfo->args + i;
2422                 if (i >= sig->hasthis)
2423                         t = sig->params [i - sig->hasthis];
2424                 else
2425                         t = &mono_defaults.int_class->byval_arg;
2426                 t = mono_type_get_underlying_type (t);
2427
2428                 in = call->args [i];
2429
2430                 if ((sig->call_convention == MONO_CALL_VARARG) &&
2431                     (!sig->pinvoke) &&
2432                     (i == sig->sentinelpos)) {
2433                         emit_sig_cookie (cfg, call, cinfo);
2434                 }
2435
2436                 switch (ainfo->regtype) {
2437                 case RegTypeGeneral:
2438                         add_outarg_reg2 (cfg, call, ainfo->regtype, ainfo->reg, in);
2439                         break;
2440                 case RegTypeFP:
2441                         if (MONO_TYPE_ISSTRUCT (t)) {
2442                                 /* Valuetype passed in one fp register */
2443                                 ainfo->regtype = RegTypeStructByValInFP;
2444                                 /* Fall through */
2445                         } else {
2446                                 if (ainfo->size == 4)
2447                                         ainfo->regtype = RegTypeFPR4;
2448                                 add_outarg_reg2 (cfg, call, ainfo->regtype, ainfo->reg, in);
2449                                 break;
2450                         }
2451                 case RegTypeStructByVal:
2452                 case RegTypeStructByAddr:
2453                 case RegTypeStructByAddrOnStack: {
2454                         guint32 align;
2455                         guint32 size;
2456
2457                         if (sig->params [i - sig->hasthis]->type == MONO_TYPE_TYPEDBYREF) {
2458                                 size = sizeof (MonoTypedRef);
2459                                 align = sizeof (gpointer);
2460                         }
2461                         else
2462                                 if (sig->pinvoke)
2463                                         size = mono_type_native_stack_size (&in->klass->byval_arg, &align);
2464                                 else {
2465                                         /*
2466                                          * Other backends use mono_type_stack_size (), but that
2467                                          * aligns the size to 8, which is larger than the size of
2468                                          * the source, leading to reads of invalid memory if the
2469                                          * source is at the end of address space.
2470                                          */
2471                                         size = mono_class_value_size (in->klass, &align);
2472                                 }
2473
2474                         g_assert (in->klass);
2475
2476                         ainfo->offparm += cinfo->sz.offStruct;
2477
2478                         MONO_INST_NEW (cfg, ins, OP_OUTARG_VT);
2479                         ins->sreg1 = in->dreg;
2480                         ins->klass = in->klass;
2481                         ins->backend.size = ainfo->size;
2482                         ins->inst_p0 = call;
2483                         ins->inst_p1 = mono_mempool_alloc (cfg->mempool, sizeof (ArgInfo));
2484                         memcpy (ins->inst_p1, ainfo, sizeof (ArgInfo));
2485
2486                         MONO_ADD_INS (cfg->cbb, ins);
2487
2488                         if (ainfo->regtype == RegTypeStructByAddr) {
2489                                 /*
2490                                  * We use OP_OUTARG_VT to copy the valuetype to a stack location, then
2491                                  * use the normal OUTARG opcodes to pass the address of the location to
2492                                  * the callee.
2493                                  */
2494                                 int treg = mono_alloc_preg (cfg);
2495                                 MONO_EMIT_NEW_BIALU_IMM (cfg, OP_ADD_IMM, treg,
2496                                                          frmReg, ainfo->offparm);
2497                                 mono_call_inst_add_outarg_reg (cfg, call, treg, ainfo->reg, FALSE);
2498                         } else if (ainfo->regtype == RegTypeStructByAddrOnStack) {
2499                                 /* The address of the valuetype is passed on the stack */
2500                                 int treg = mono_alloc_preg (cfg);
2501                                 MONO_EMIT_NEW_BIALU_IMM (cfg, OP_ADD_IMM, treg,
2502                                                          frmReg, ainfo->offparm);
2503                                 MONO_EMIT_NEW_STORE_MEMBASE (cfg, OP_STORE_MEMBASE_REG,
2504                                                              ainfo->reg, ainfo->offset, treg);
2505
2506                                 if (cfg->compute_gc_maps) {
2507                                         MonoInst *def;
2508
2509                                         EMIT_NEW_GC_PARAM_SLOT_LIVENESS_DEF (cfg, def, ainfo->offset, t);
2510                                 }
2511                         }
2512                         break;
2513                 }
2514                 case RegTypeBase:
2515                         if (!t->byref && t->type == MONO_TYPE_R4) {
2516                                 MONO_EMIT_NEW_STORE_MEMBASE (cfg, OP_STORER4_MEMBASE_REG,
2517                                                              STK_BASE, ainfo->offset + 4,
2518                                                              in->dreg);
2519                         } else if (!t->byref && (t->type == MONO_TYPE_R8)) {
2520                                 MONO_EMIT_NEW_STORE_MEMBASE (cfg, OP_STORER8_MEMBASE_REG,
2521                                                              STK_BASE, ainfo->offset,
2522                                                              in->dreg);
2523                         } else {
2524                                 MONO_INST_NEW (cfg, ins, OP_STORE_MEMBASE_REG);
2525                                 ins->inst_destbasereg = STK_BASE;
2526                                 ins->inst_offset = ainfo->offset;
2527                                 ins->sreg1 = in->dreg;
2528
2529 #if 0
2530                                 /* This is needed by MonoTypedRef->value to point to the correct data */
2531                                 if ((sig->call_convention == MONO_CALL_VARARG) &&
2532                                         (i >= sig->sentinelpos)) {
2533                                         switch (ainfo->size) {
2534                                         case 1:
2535                                                 ins->opcode = OP_STOREI1_MEMBASE_REG;
2536                                                 break;
2537                                         case 2:
2538                                                 ins->opcode = OP_STOREI2_MEMBASE_REG;
2539                                                 break;
2540                                         case 4:
2541                                                 ins->opcode = OP_STOREI4_MEMBASE_REG;
2542                                                 break;
2543                                         default:
2544                                                 break;
2545                                         }
2546                                 }
2547 #endif
2548
2549                                 MONO_ADD_INS (cfg->cbb, ins);
2550                         }
2551                         break;
2552                 default:
2553                         g_assert_not_reached ();
2554                         break;
2555                 }
2556         }
2557
2558         /*
2559          * Handle the case where there are no implicit arguments
2560          */
2561         if ((sig->call_convention == MONO_CALL_VARARG) &&
2562             (!sig->pinvoke) &&
2563             (i == sig->sentinelpos)) {
2564                 emit_sig_cookie (cfg, call, cinfo);
2565         }
2566 }
2567
2568 /*========================= End of Function ========================*/
2569
2570 /*------------------------------------------------------------------*/
2571 /*                                                                  */
2572 /* Name         - mono_arch_emit_outarg_vt                          */
2573 /*                                                                  */
2574 /*------------------------------------------------------------------*/
2575
2576 void
2577 mono_arch_emit_outarg_vt (MonoCompile *cfg, MonoInst *ins, MonoInst *src)
2578 {
2579         MonoCallInst *call = (MonoCallInst*)ins->inst_p0;
2580         ArgInfo *ainfo = (ArgInfo*)ins->inst_p1;
2581         int size = ins->backend.size;
2582
2583         if (ainfo->regtype == RegTypeStructByVal) {
2584                 /*
2585                                 arg->ins.sreg1  = ainfo->reg;
2586                                 arg->ins.opcode = OP_OUTARG_VT;
2587                                 arg->size       = ainfo->size;
2588                                 arg->offset     = ainfo->offset;
2589                                 arg->offPrm     = ainfo->offparm + cinfo->sz.offStruct;
2590                 */
2591                 if (ainfo->reg != STK_BASE) {
2592                         MONO_OUTPUT_VTR (cfg, size, ainfo->reg, src->dreg, 0);
2593                 } else {
2594                         MONO_OUTPUT_VTS (cfg, size, ainfo->reg, ainfo->offset,
2595                                                           src->dreg, 0);
2596                 }
2597         } else if (ainfo->regtype == RegTypeStructByValInFP) {
2598                 int dreg = mono_alloc_freg (cfg);
2599
2600                 if (ainfo->size == 4) {
2601                         MONO_EMIT_NEW_LOAD_MEMBASE_OP (cfg, OP_LOADR4_MEMBASE, dreg, src->dreg, 0);
2602                         MONO_EMIT_NEW_UNALU (cfg, OP_S390_SETF4RET, dreg, dreg);
2603                 } else {
2604                         g_assert (ainfo->size == 8);
2605
2606                         MONO_EMIT_NEW_LOAD_MEMBASE_OP (cfg, OP_LOADR8_MEMBASE, dreg, src->dreg, 0);
2607                 }
2608
2609                 mono_call_inst_add_outarg_reg (cfg, call, dreg, ainfo->reg, TRUE);
2610         } else {
2611                 MonoMethodHeader *header;
2612                 int srcReg;
2613
2614                 header = mono_method_get_header (cfg->method);
2615                 if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
2616                         srcReg = s390_r11;
2617                 else
2618                         srcReg = STK_BASE;
2619
2620                 MONO_EMIT_NEW_MOVE (cfg, srcReg, ainfo->offparm,
2621                                                          src->dreg, 0, size);
2622
2623                 if (cfg->compute_gc_maps) {
2624                         MonoInst *def;
2625
2626                         EMIT_NEW_GC_PARAM_SLOT_LIVENESS_DEF (cfg, def, ainfo->offset, &ins->klass->byval_arg);
2627                 }
2628         }
2629 }
2630
2631 /*========================= End of Function ========================*/
2632
2633 /*------------------------------------------------------------------*/
2634 /*                                                                  */
2635 /* Name         - mono_arch_emit_setret                             */
2636 /*                                                                  */
2637 /*------------------------------------------------------------------*/
2638
2639 void
2640 mono_arch_emit_setret (MonoCompile *cfg, MonoMethod *method, MonoInst *val)
2641 {
2642         MonoType *ret = mono_type_get_underlying_type (mono_method_signature (method)->ret);
2643
2644         if (!ret->byref) {
2645                 if (ret->type == MONO_TYPE_R4) {
2646                         MONO_EMIT_NEW_UNALU (cfg, OP_S390_SETF4RET, s390_f0, val->dreg);
2647                         return;
2648                 } else if (ret->type == MONO_TYPE_R8) {
2649                         MONO_EMIT_NEW_UNALU (cfg, OP_FMOVE, s390_f0, val->dreg);
2650                         return;
2651                 }
2652         }
2653
2654         MONO_EMIT_NEW_UNALU (cfg, OP_MOVE, cfg->ret->dreg, val->dreg);
2655 }
2656
2657 /*========================= End of Function ========================*/
2658
2659 /*------------------------------------------------------------------*/
2660 /*                                                                  */
2661 /* Name         - mono_arch_instrument_mem_needs                    */
2662 /*                                                                  */
2663 /* Function     - Allow tracing to work with this interface (with   */
2664 /*                an optional argument).                            */
2665 /*                                                                  */
2666 /*------------------------------------------------------------------*/
2667
2668 void
2669 mono_arch_instrument_mem_needs (MonoMethod *method, int *stack, int *code)
2670 {
2671         /* no stack room needed now (may be needed for FASTCALL-trace support) */
2672         *stack = 0;
2673         /* split prolog-epilog requirements? */
2674         *code = 50; /* max bytes needed: check this number */
2675 }
2676
2677 /*========================= End of Function ========================*/
2678
2679 /*------------------------------------------------------------------*/
2680 /*                                                                  */
2681 /* Name         - mono_arch_instrument_prolog                       */
2682 /*                                                                  */
2683 /* Function     - Create an "instrumented" prolog.                  */
2684 /*                                                                  */
2685 /*------------------------------------------------------------------*/
2686
2687 void*
2688 mono_arch_instrument_prolog (MonoCompile *cfg, void *func, void *p,
2689                              gboolean enable_arguments)
2690 {
2691         guchar  *code = p;
2692         int     parmOffset,
2693                 fpOffset,
2694                 baseReg;
2695
2696         parmOffset = cfg->stack_usage - S390_TRACE_STACK_SIZE;
2697         if (cfg->method->save_lmf)
2698                 parmOffset -= sizeof(MonoLMF);
2699         fpOffset   = parmOffset + (5*sizeof(gpointer));
2700         if ((!has_ld) && (fpOffset > 4096)) {
2701                 s390_lgr (code, s390_r12, STK_BASE);
2702                 baseReg = s390_r12;
2703                 while (fpOffset > 4096) {
2704                         s390_aghi (code, baseReg, 4096);
2705                         fpOffset   -= 4096;
2706                         parmOffset -= 4096;
2707                 }
2708         } else {
2709                 baseReg = STK_BASE;
2710         }
2711
2712         s390_stmg (code, s390_r2, s390_r6, STK_BASE, parmOffset);
2713         if (has_ld) {
2714                 s390_stdy (code, s390_f0, 0, STK_BASE, fpOffset);
2715                 s390_stdy (code, s390_f2, 0, STK_BASE, fpOffset+sizeof(gdouble));
2716                 s390_stdy (code, s390_f4, 0, STK_BASE, fpOffset+2*sizeof(gdouble));
2717                 s390_stdy (code, s390_f6, 0, STK_BASE, fpOffset+3*sizeof(gdouble));
2718         } else {
2719                 s390_std  (code, s390_f0, 0, baseReg, fpOffset);
2720                 s390_std  (code, s390_f2, 0, baseReg, fpOffset+sizeof(gdouble));
2721                 s390_std  (code, s390_f4, 0, baseReg, fpOffset+2*sizeof(gdouble));
2722                 s390_std  (code, s390_f6, 0, baseReg, fpOffset+3*sizeof(gdouble));
2723         }
2724         s390_basr (code, s390_r13, 0);
2725         s390_j    (code, 10);
2726         s390_llong(code, cfg->method);
2727         s390_llong(code, func);
2728         s390_lg   (code, s390_r2, 0, s390_r13, 4);
2729         if (has_ld)
2730                 s390_lay  (code, s390_r3, 0, STK_BASE, parmOffset);
2731         else
2732                 s390_la   (code, s390_r3, 0, baseReg, parmOffset);
2733         s390_lgr  (code, s390_r4, STK_BASE);
2734         s390_aghi (code, s390_r4, cfg->stack_usage);
2735         s390_lg   (code, s390_r1, 0, s390_r13, 12);
2736         s390_basr (code, s390_r14, s390_r1);
2737         if (has_ld) {
2738                 s390_ldy  (code, s390_f6, 0, STK_BASE, fpOffset+3*sizeof(gdouble));
2739                 s390_ldy  (code, s390_f4, 0, STK_BASE, fpOffset+2*sizeof(gdouble));
2740                 s390_ldy  (code, s390_f2, 0, STK_BASE, fpOffset+sizeof(gdouble));
2741                 s390_ldy  (code, s390_f0, 0, STK_BASE, fpOffset);
2742         } else {
2743                 s390_ld   (code, s390_f6, 0, baseReg, fpOffset+3*sizeof(gdouble));
2744                 s390_ld   (code, s390_f4, 0, baseReg, fpOffset+2*sizeof(gdouble));
2745                 s390_ld   (code, s390_f2, 0, baseReg, fpOffset+sizeof(gdouble));
2746                 s390_ld   (code, s390_f0, 0, baseReg, fpOffset);
2747         }
2748         s390_lmg  (code, s390_r2, s390_r6, STK_BASE, parmOffset);
2749
2750         return code;
2751 }
2752
2753 /*========================= End of Function ========================*/
2754
2755 /*------------------------------------------------------------------*/
2756 /*                                                                  */
2757 /* Name         - mono_arch_instrument_epilog                       */
2758 /*                                                                  */
2759 /* Function     - Create an epilog that will handle the returned    */
2760 /*                values used in instrumentation.                   */
2761 /*                                                                  */
2762 /*------------------------------------------------------------------*/
2763
2764 void*
2765 mono_arch_instrument_epilog_full (MonoCompile *cfg, void *func, void *p, gboolean enable_arguments, gboolean preserve_argument_registers)
2766 {
2767         guchar     *code = p;
2768         int        save_mode = SAVE_NONE,
2769                    saveOffset,
2770                    offset;
2771         MonoMethod *method = cfg->method;
2772         int        rtype = mono_type_get_underlying_type (mono_method_signature (method)->ret)->type;
2773
2774         offset = code - cfg->native_code;
2775         /*-----------------------------------------*/
2776         /* We need about 128 bytes of instructions */
2777         /*-----------------------------------------*/
2778         if (offset > (cfg->code_size - 128)) {
2779                 cfg->code_size *= 2;
2780                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
2781                 code = cfg->native_code + offset;
2782         }
2783
2784         saveOffset = cfg->stack_usage - S390_TRACE_STACK_SIZE;
2785         if (method->save_lmf)
2786                 saveOffset -= sizeof(MonoLMF);
2787
2788 handle_enum:
2789         switch (rtype) {
2790         case MONO_TYPE_VOID:
2791                 /* special case string .ctor icall */
2792                 if (strcmp (".ctor", method->name) && method->klass == mono_defaults.string_class)
2793                         save_mode = SAVE_ONE;
2794                 else
2795                         save_mode = SAVE_NONE;
2796                 break;
2797         case MONO_TYPE_I8:
2798         case MONO_TYPE_U8:
2799                 save_mode = SAVE_ONE;
2800                 break;
2801         case MONO_TYPE_R4:
2802                 save_mode = SAVE_R4;
2803                 break;
2804         case MONO_TYPE_R8:
2805                 save_mode = SAVE_R8;
2806                 break;
2807         case MONO_TYPE_VALUETYPE:
2808                 if (mono_method_signature (method)->ret->data.klass->enumtype) {
2809                         rtype = mono_class_enum_basetype (mono_method_signature (method)->ret->data.klass)->type;
2810                         goto handle_enum;
2811                 }
2812                 save_mode = SAVE_STRUCT;
2813                 break;
2814         default:
2815                 save_mode = SAVE_ONE;
2816                 break;
2817         }
2818
2819         switch (save_mode) {
2820         case SAVE_ONE:
2821                 s390_stg (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2822                 if (enable_arguments) {
2823                         s390_lgr (code, s390_r3, s390_r2);
2824                 }
2825                 break;
2826         case SAVE_R4:
2827                 s390_std (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2828                 if (enable_arguments) {
2829                         s390_ldebr (code, s390_f0, s390_f0);
2830                 }
2831                 break;
2832         case SAVE_R8:
2833                 s390_std (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2834                 break;
2835         case SAVE_STRUCT:
2836                 s390_stg (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2837                 if (enable_arguments) {
2838                         s390_lg (code, s390_r3, 0, cfg->frame_reg,
2839                                  S390_MINIMAL_STACK_SIZE+cfg->param_area);
2840                 }
2841                 break;
2842         case SAVE_NONE:
2843         default:
2844                 break;
2845         }
2846
2847         s390_basr (code, s390_r13, 0);
2848         s390_j    (code, 10);
2849         s390_llong(code, cfg->method);
2850         s390_llong(code, func);
2851         s390_lg   (code, s390_r2, 0, s390_r13, 4);
2852         s390_lg   (code, s390_r1, 0, s390_r13, 12);
2853         s390_basr (code, s390_r14, s390_r1);
2854
2855         switch (save_mode) {
2856         case SAVE_ONE:
2857                 s390_lg  (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2858                 break;
2859         case SAVE_R4:
2860         case SAVE_R8:
2861                 s390_ld  (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2862                 break;
2863         case SAVE_STRUCT:
2864                 s390_lg  (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2865                 break;
2866         case SAVE_NONE:
2867         default:
2868                 break;
2869         }
2870
2871         return code;
2872 }
2873
2874 /*========================= End of Function ========================*/
2875
2876 /*------------------------------------------------------------------*/
2877 /*                                                                  */
2878 /* Name         - mono_arch_peephole_pass_1                         */
2879 /*                                                                  */
2880 /* Function     - Form a peephole pass at the code looking for      */
2881 /*                simple optimizations.                             */
2882 /*                                                                  */
2883 /*------------------------------------------------------------------*/
2884
2885 void
2886 mono_arch_peephole_pass_1 (MonoCompile *cfg, MonoBasicBlock *bb)
2887 {
2888 }
2889
2890 /*========================= End of Function ========================*/
2891
2892 /*------------------------------------------------------------------*/
2893 /*                                                                  */
2894 /* Name         - mono_arch_peephole_pass_2                         */
2895 /*                                                                  */
2896 /* Function     - Form a peephole pass at the code looking for      */
2897 /*                simple optimizations.                             */
2898 /*                                                                  */
2899 /*------------------------------------------------------------------*/
2900
2901 void
2902 mono_arch_peephole_pass_2 (MonoCompile *cfg, MonoBasicBlock *bb)
2903 {
2904         MonoInst *ins, *n;
2905
2906         MONO_BB_FOR_EACH_INS_SAFE (bb, n, ins) {
2907                 mono_peephole_ins (bb, ins);
2908         }
2909 }
2910
2911 /*========================= End of Function ========================*/
2912
2913 /*------------------------------------------------------------------*/
2914 /*                                                                  */
2915 /* Name         - mono_arch_lowering_pass.                          */
2916 /*                                                                  */
2917 /*------------------------------------------------------------------*/
2918
2919 void
2920 mono_arch_lowering_pass (MonoCompile *cfg, MonoBasicBlock *bb)
2921 {
2922         MonoInst *ins, *next;
2923
2924         MONO_BB_FOR_EACH_INS_SAFE (bb, next, ins) {
2925                 switch (ins->opcode) {
2926                 case OP_DIV_IMM:
2927                 case OP_REM_IMM:
2928                 case OP_IDIV_IMM:
2929                 case OP_IREM_IMM:
2930                 case OP_IDIV_UN_IMM:
2931                 case OP_IREM_UN_IMM:
2932                 case OP_LAND_IMM:
2933                 case OP_LOR_IMM:
2934                 case OP_LXOR_IMM:
2935                 case OP_LOCALLOC_IMM:
2936                         mono_decompose_op_imm (cfg, bb, ins);
2937                         break;
2938                 case OP_LADD_IMM:
2939                         if (!s390_is_imm16 (ins->inst_imm))
2940                                 /* This is created by the memcpy code which ignores is_inst_imm */
2941                                 mono_decompose_op_imm (cfg, bb, ins);
2942                         break;
2943                 default:
2944                         break;
2945                 }
2946         }
2947
2948         bb->max_vreg = cfg->next_vreg;
2949 }
2950
2951 /*========================= End of Function ========================*/
2952
2953 /*------------------------------------------------------------------*/
2954 /*                                                                  */
2955 /* Name         - emit_float_to_int                                 */
2956 /*                                                                  */
2957 /* Function     - Create instructions which will convert a floating */
2958 /*                point value to integer.                           */
2959 /*                                                                  */
2960 /*------------------------------------------------------------------*/
2961
2962 static guchar*
2963 emit_float_to_int (MonoCompile *cfg, guchar *code, int dreg, int sreg, int size, gboolean is_signed)
2964 {
2965         /* sreg is a float, dreg is an integer reg. */
2966         if (is_signed) {
2967                 s390_cgdbr (code, dreg, 5, sreg);
2968                 switch (size) {
2969                         case 1:
2970                                 s390_lghi (code, s390_r0, 0);
2971                                 s390_lghi (code, s390_r13, 0xff);
2972                                 s390_ltgr (code, dreg, dreg);
2973                                 s390_jnl  (code, 4);
2974                                 s390_lghi (code, s390_r0, 0x80);
2975                                 s390_ngr  (code, dreg, s390_r13);
2976                                 s390_ogr  (code, dreg, s390_r0);
2977                                 break;
2978                 }
2979         } else {
2980                 short *o[1];
2981                 s390_basr   (code, s390_r13, 0);
2982                 s390_j      (code, 10);
2983                 s390_llong  (code, 0x41e0000000000000llu);
2984                 s390_llong  (code, 0x41f0000000000000llu);
2985                 s390_ldr    (code, s390_f15, sreg);
2986                 s390_cdb    (code, s390_f15, 0, s390_r13, 4);
2987                 s390_jl     (code, 0); CODEPTR (code, o[0]);
2988                 s390_sdb    (code, s390_f15, 0, s390_r13, 12);
2989                 s390_cfdbr  (code, dreg, 7, s390_f15);
2990                 s390_j      (code, 4);
2991                 PTRSLOT (code, o[0]);
2992                 s390_cfdbr  (code, dreg, 5, sreg);
2993                 switch (size) {
2994                         case 1:
2995                                 s390_lghi (code, s390_r0, 0xff);
2996                                 s390_ngr  (code, dreg, s390_r0);
2997                                 break;
2998                         case 2:
2999                                 s390_lghi (code, s390_r0, -1);
3000                                 s390_srlg (code, s390_r0, s390_r0, 0, 16);
3001                                 s390_ngr  (code, dreg, s390_r0);
3002                                 break;
3003                 }
3004         }
3005         return code;
3006 }
3007
3008 /*========================= End of Function ========================*/
3009
3010 /*------------------------------------------------------------------*/
3011 /*                                                                  */
3012 /* Name         - gboolean_is_unsigned.                             */
3013 /*                                                                  */
3014 /* Function     - Return TRUE if next opcode is checking for un-    */
3015 /*                signed value.                                     */
3016 /*                                                                  */
3017 /*------------------------------------------------------------------*/
3018
3019 static
3020 gboolean is_unsigned (MonoInst *next)
3021 {
3022         if ((next) &&
3023                 (((next->opcode >= OP_IBNE_UN) &&
3024                   (next->opcode <= OP_IBLT_UN)) ||
3025                  ((next->opcode >= OP_LBNE_UN) &&
3026                   (next->opcode <= OP_LBLT_UN)) ||
3027                  ((next->opcode >= OP_COND_EXC_NE_UN) &&
3028                   (next->opcode <= OP_COND_EXC_LT_UN)) ||
3029                  ((next->opcode >= OP_COND_EXC_INE_UN) &&
3030                   (next->opcode <= OP_COND_EXC_ILT_UN)) ||
3031                  ((next->opcode == OP_CLT_UN) ||
3032                   (next->opcode == OP_CGT_UN)) ||
3033                  ((next->opcode == OP_ICLT_UN) ||
3034                   (next->opcode == OP_ICGT_UN) ||
3035                   (next->opcode == OP_LCLT_UN) ||
3036                   (next->opcode == OP_LCGT_UN))))
3037                 return TRUE;
3038         else
3039                 return FALSE;
3040 }
3041
3042 /*========================= End of Function ========================*/
3043
3044 /*------------------------------------------------------------------*/
3045 /*                                                                  */
3046 /* Name         - mono_arch_output_basic_block                      */
3047 /*                                                                  */
3048 /* Function     - Perform the "real" work of emitting instructions  */
3049 /*                that will do the work of in the basic block.      */
3050 /*                                                                  */
3051 /*------------------------------------------------------------------*/
3052
3053 void
3054 mono_arch_output_basic_block (MonoCompile *cfg, MonoBasicBlock *bb)
3055 {
3056         MonoInst *ins;
3057         MonoCallInst *call;
3058         guint offset;
3059         guint8 *code = cfg->native_code + cfg->code_len;
3060         guint last_offset = 0;
3061         int max_len, cpos, src2;
3062
3063         /* we don't align basic blocks of loops on s390 */
3064
3065         if (cfg->verbose_level > 2)
3066                 g_print ("Basic block %d starting at offset 0x%x\n", bb->block_num, bb->native_offset);
3067
3068         cpos = bb->max_offset;
3069
3070         if (cfg->prof_options & MONO_PROFILE_COVERAGE) {
3071                 //MonoCoverageInfo *cov = mono_get_coverage_info (cfg->method);
3072                 //g_assert (!mono_compile_aot);
3073                 //cpos += 6;
3074                 //if (bb->cil_code)
3075                 //      cov->data [bb->dfn].iloffset = bb->cil_code - cfg->cil_code;
3076                 /* this is not thread save, but good enough */
3077                 /* fixme: howto handle overflows? */
3078                 //x86_inc_mem (code, &cov->data [bb->dfn].count);
3079         }
3080
3081         MONO_BB_FOR_EACH_INS (bb, ins) {
3082                 offset = code - cfg->native_code;
3083
3084                 max_len = ((guint8 *)ins_get_spec (ins->opcode))[MONO_INST_LEN];
3085
3086                 if (offset > (cfg->code_size - max_len - 16)) {
3087                         cfg->code_size *= 2;
3088                         cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
3089                         code = cfg->native_code + offset;
3090                 }
3091
3092                 mono_debug_record_line_number (cfg, ins, offset);
3093
3094                 switch (ins->opcode) {
3095                 case OP_STOREI1_MEMBASE_IMM: {
3096                         s390_lghi (code, s390_r0, ins->inst_imm);
3097                         S390_LONG (code, stcy, stc, s390_r0, 0,
3098                                    ins->inst_destbasereg, ins->inst_offset);
3099                 }
3100                         break;
3101                 case OP_STOREI2_MEMBASE_IMM: {
3102                         s390_lghi (code, s390_r0, ins->inst_imm);
3103                         S390_LONG (code, sthy, sth, s390_r0, 0,
3104                                    ins->inst_destbasereg, ins->inst_offset);
3105                 }
3106                         break;
3107                 case OP_STOREI4_MEMBASE_IMM: {
3108                         if (s390_is_imm16(ins->inst_imm)) {
3109                                 s390_lghi (code, s390_r0, ins->inst_imm);
3110                         } else {
3111                                 s390_basr (code, s390_r13, 0);
3112                                 s390_j    (code, 6);
3113                                 s390_llong(code, ins->inst_imm);
3114                                 s390_lg   (code, s390_r0, 0, s390_r13, 4);
3115                         }
3116                         S390_LONG (code, sty, st, s390_r0, 0,
3117                                    ins->inst_destbasereg, ins->inst_offset);
3118                 }
3119                         break;
3120                 case OP_STORE_MEMBASE_IMM:
3121                 case OP_STOREI8_MEMBASE_IMM: {
3122                         if (s390_is_imm16(ins->inst_imm)) {
3123                                 s390_lghi (code, s390_r0, ins->inst_imm);
3124                         } else {
3125                                 s390_basr (code, s390_r13, 0);
3126                                 s390_j    (code, 6);
3127                                 s390_llong(code, ins->inst_imm);
3128                                 s390_lg   (code, s390_r0, 0, s390_r13, 4);
3129                         }
3130                         S390_LONG (code, stg, stg, s390_r0, 0,
3131                                    ins->inst_destbasereg, ins->inst_offset);
3132                 }
3133                         break;
3134                 case OP_STOREI1_MEMBASE_REG: {
3135                         S390_LONG (code, stcy, stc, ins->sreg1, 0,
3136                                    ins->inst_destbasereg, ins->inst_offset);
3137                 }
3138                         break;
3139                 case OP_STOREI2_MEMBASE_REG: {
3140                         S390_LONG (code, sthy, sth, ins->sreg1, 0,
3141                                    ins->inst_destbasereg, ins->inst_offset);
3142                 }
3143                         break;
3144                 case OP_STOREI4_MEMBASE_REG: {
3145                         S390_LONG (code, sty, st, ins->sreg1, 0,
3146                                    ins->inst_destbasereg, ins->inst_offset);
3147                 }
3148                         break;
3149                 case OP_STORE_MEMBASE_REG:
3150                 case OP_STOREI8_MEMBASE_REG: {
3151                         S390_LONG (code, stg, stg, ins->sreg1, 0,
3152                                    ins->inst_destbasereg, ins->inst_offset);
3153                 }
3154                         break;
3155                 case OP_LOADU4_MEM:
3156                         g_assert_not_reached ();
3157                         break;
3158                 case OP_LOAD_MEMBASE:
3159                 case OP_LOADI8_MEMBASE: {
3160                         S390_LONG (code, lg, lg, ins->dreg, 0,
3161                                    ins->inst_basereg, ins->inst_offset);
3162                 }
3163                         break;
3164                 case OP_LOADI4_MEMBASE: {
3165                         S390_LONG (code, lgf, lgf, ins->dreg, 0,
3166                                    ins->inst_basereg, ins->inst_offset);
3167                 }
3168                         break;
3169                 case OP_LOADU4_MEMBASE: {
3170                         S390_LONG (code, llgf, llgf, ins->dreg, 0,
3171                                    ins->inst_basereg, ins->inst_offset);
3172                 }
3173                         break;
3174                 case OP_LOADU1_MEMBASE: {
3175                         S390_LONG (code, llgc, llgc, ins->dreg, 0,
3176                                    ins->inst_basereg, ins->inst_offset);
3177                 }
3178                         break;
3179                 case OP_LOADI1_MEMBASE: {
3180                         S390_LONG (code, lgb, lgb, ins->dreg, 0,
3181                                    ins->inst_basereg, ins->inst_offset);
3182                 }
3183                         break;
3184                 case OP_LOADU2_MEMBASE: {
3185                         S390_LONG (code, llgh, llgh, ins->dreg, 0,
3186                                    ins->inst_basereg, ins->inst_offset);
3187                 }
3188                         break;
3189                 case OP_LOADI2_MEMBASE: {
3190                         S390_LONG (code, lgh, lgh, ins->dreg, 0,
3191                                    ins->inst_basereg, ins->inst_offset);
3192                 }
3193                         break;
3194                 case OP_LCONV_TO_I1: {
3195 #if 0
3196                         s390_lgbr (code, ins->dreg, ins->sreg1);
3197 #else
3198                         s390_sllg (code, ins->dreg, ins->sreg1, 0, 56);
3199                         s390_srag (code, ins->dreg, ins->dreg, 0, 56);
3200 #endif
3201                 }
3202                         break;
3203                 case OP_LCONV_TO_I2: {
3204 #if 0
3205                         s390_lghr (code, ins->dreg, ins->sreg1);
3206 #else
3207                         s390_sllg (code, ins->dreg, ins->sreg1, 0, 48);
3208                         s390_srag (code, ins->dreg, ins->dreg, 0, 48);
3209 #endif
3210                 }
3211                         break;
3212                 case OP_LCONV_TO_U1: {
3213 #if 0
3214                         s390_llghr (code, ins->dreg, ins->sreg1);
3215 #else
3216                         if (ins->dreg != ins->sreg1)
3217                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3218                         s390_lghi  (code, s390_r0, 0xff);
3219                         s390_ngr   (code, ins->dreg, s390_r0);
3220 #endif
3221                 }
3222                         break;
3223                 case OP_LCONV_TO_U2: {
3224 #if 0
3225                         s390_llghr (code, ins->dreg, ins->sreg1);
3226 #else
3227                         if (ins->dreg != ins->sreg1)
3228                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3229                         s390_lghi  (code, s390_r0, -1);
3230                         s390_srlg  (code, s390_r0, s390_r0, 0, 48);
3231                         s390_ngr   (code, ins->dreg, s390_r0);
3232 #endif
3233                 }
3234                         break;
3235                 case OP_ICONV_TO_I1: {
3236 #if 0
3237                         s390_lbr  (code, ins->dreg, ins->sreg1);
3238 #else
3239                         if (ins->dreg != ins->sreg1)
3240                                 s390_lr  (code, ins->dreg, ins->sreg1);
3241                         s390_sll (code, ins->dreg, 0, 24);
3242                         s390_sra (code, ins->dreg, 0, 24);
3243
3244 #endif
3245                 }
3246                         break;
3247                 case OP_ICONV_TO_I2: {
3248 #if 0
3249                         s390_lhr  (code, ins->dreg, ins->sreg1);
3250 #else
3251                         if (ins->dreg != ins->sreg1)
3252                                 s390_lr  (code, ins->dreg, ins->sreg1);
3253                         s390_sll (code, ins->dreg, 0, 16);
3254                         s390_sra (code, ins->dreg, 0, 16);
3255 #endif
3256                 }
3257                         break;
3258                 case OP_ICONV_TO_U1: {
3259 #if 0
3260                         s390_llcr (code, ins->dreg, ins->sreg1);
3261 #else
3262                         if (ins->dreg != ins->sreg1)
3263                                 s390_lr  (code, ins->dreg, ins->sreg1);
3264                         s390_lhi  (code, s390_r0, 0xff);
3265                         s390_nr   (code, ins->dreg, s390_r0);
3266 #endif
3267                 }
3268                         break;
3269                 case OP_ICONV_TO_U2: {
3270 #if 0
3271                         s390_llhr (code, ins->dreg, ins->sreg1);
3272 #else
3273                         if (ins->dreg != ins->sreg1)
3274                                 s390_lr  (code, ins->dreg, ins->sreg1);
3275                         s390_lhi  (code, s390_r0, -1);
3276                         s390_srl  (code, s390_r0, 0, 16);
3277                         s390_nr   (code, ins->dreg, s390_r0);
3278 #endif
3279                 }
3280                         break;
3281                 case OP_COMPARE:
3282                 case OP_LCOMPARE: {
3283                         if (is_unsigned (ins->next))
3284                                 s390_clgr (code, ins->sreg1, ins->sreg2);
3285                         else
3286                                 s390_cgr  (code, ins->sreg1, ins->sreg2);
3287                 }
3288                         break;
3289                 case OP_ICOMPARE: {
3290                         if (is_unsigned (ins->next))
3291                                 s390_clr  (code, ins->sreg1, ins->sreg2);
3292                         else
3293                                 s390_cr   (code, ins->sreg1, ins->sreg2);
3294                 }
3295                         break;
3296                 case OP_COMPARE_IMM:
3297                 case OP_LCOMPARE_IMM: {
3298                         if (s390_is_imm16 (ins->inst_imm)) {
3299                                 s390_lghi (code, s390_r0, ins->inst_imm);
3300                                 if (is_unsigned (ins->next))
3301                                         s390_clgr (code, ins->sreg1, s390_r0);
3302                                 else
3303                                         s390_cgr  (code, ins->sreg1, s390_r0);
3304                         } else {
3305                                 s390_basr (code, s390_r13, 0);
3306                                 s390_j    (code, 6);
3307                                 s390_llong(code, ins->inst_imm);
3308                                 if (is_unsigned (ins->next))
3309                                         s390_clg  (code, ins->sreg1, 0, s390_r13, 4);
3310                                 else
3311                                         s390_cg   (code, ins->sreg1, 0, s390_r13, 4);
3312                         }
3313                 }
3314                         break;
3315                 case OP_ICOMPARE_IMM: {
3316                         if (s390_is_imm16 (ins->inst_imm)) {
3317                                 s390_lghi (code, s390_r0, ins->inst_imm);
3318                                 if (is_unsigned (ins->next))
3319                                         s390_clr  (code, ins->sreg1, s390_r0);
3320                                 else
3321                                         s390_cr   (code, ins->sreg1, s390_r0);
3322                         }
3323                         else {
3324                                 s390_basr (code, s390_r13, 0);
3325                                 s390_j    (code, 4);
3326                                 s390_word (code, ins->inst_imm);
3327                                 if (is_unsigned (ins->next))
3328                                         s390_cl  (code, ins->sreg1, 0, s390_r13, 4);
3329                                 else
3330                                         s390_c   (code, ins->sreg1, 0, s390_r13, 4);
3331                         }
3332                 }
3333                         break;
3334                 case OP_BREAK: {
3335                         s390_basr  (code, s390_r13, 0);
3336                         s390_j     (code, 6);
3337                         mono_add_patch_info (cfg, code - cfg->native_code, MONO_PATCH_INFO_ABS,
3338                                              mono_break);
3339                         s390_llong (code, mono_break);
3340                         s390_lg    (code, s390_r14, 0, s390_r13, 4);
3341                         s390_basr  (code, s390_r14, s390_r14);
3342                 }
3343                         break;
3344                 case OP_ADDCC: {
3345                         CHECK_SRCDST_COM;
3346                         s390_agr  (code, ins->dreg, src2);
3347                 }
3348                         break;
3349                 case OP_LADD: {
3350                         CHECK_SRCDST_COM;
3351                         s390_agr   (code, ins->dreg, src2);
3352                 }
3353                         break;
3354                 case OP_ADC: {
3355                         CHECK_SRCDST_COM;
3356                         s390_alcgr (code, ins->dreg, src2);
3357                 }
3358                         break;
3359                 case OP_ADD_IMM: {
3360                         if (ins->dreg != ins->sreg1) {
3361                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3362                         }
3363                         if (s390_is_imm16 (ins->inst_imm)) {
3364                                 s390_aghi (code, ins->dreg, ins->inst_imm);
3365                         } else {
3366                                 s390_basr (code, s390_r13, 0);
3367                                 s390_j    (code, 6);
3368                                 s390_llong(code, ins->inst_imm);
3369                                 s390_ag   (code, ins->dreg, 0, s390_r13, 4);
3370                         }
3371                 }
3372                         break;
3373                 case OP_LADD_IMM: {
3374                         if (ins->dreg != ins->sreg1) {
3375                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3376                         }
3377                         g_assert (s390_is_imm16 (ins->inst_imm));
3378                         s390_aghi (code, ins->dreg, ins->inst_imm);
3379                 }
3380                         break;
3381                 case OP_ADC_IMM: {
3382                         if (ins->dreg != ins->sreg1) {
3383                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3384                         }
3385                         if (s390_is_imm16 (ins->inst_imm)) {
3386                                 s390_lghi  (code, s390_r0, ins->inst_imm);
3387                                 s390_alcgr (code, ins->dreg, s390_r0);
3388                         } else {
3389                                 s390_basr  (code, s390_r13, 0);
3390                                 s390_j     (code, 6);
3391                                 s390_llong (code, ins->inst_imm);
3392                                 s390_lg    (code, s390_r13, 0, s390_r13, 4);
3393                                 s390_alcgr (code, ins->dreg, s390_r13);
3394                         }
3395                 }
3396                         break;
3397                 case OP_IADD_OVF:
3398                 case OP_S390_IADD_OVF: {
3399                         CHECK_SRCDST_COM;
3400                         s390_ar    (code, ins->dreg, src2);
3401                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3402                         s390_lgfr  (code, ins->dreg, ins->dreg);
3403                 }
3404                         break;
3405                 case OP_IADD_OVF_UN:
3406                 case OP_S390_IADD_OVF_UN: {
3407                         CHECK_SRCDST_COM;
3408                         s390_algr  (code, ins->dreg, src2);
3409                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
3410                         s390_llgfr (code, ins->dreg, ins->dreg);
3411                 }
3412                         break;
3413                 case OP_ADD_OVF_CARRY: {
3414                         CHECK_SRCDST_COM;
3415                         s390_lghi  (code, s390_r0, 0);
3416                         s390_lgr   (code, s390_r1, s390_r0);
3417                         s390_alcgr (code, s390_r0, s390_r1);
3418                         s390_agr   (code, ins->dreg, src2);
3419                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3420                         s390_agr   (code, ins->dreg, s390_r0);
3421                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3422                 }
3423                         break;
3424                 case OP_ADD_OVF_UN_CARRY: {
3425                         CHECK_SRCDST_COM;
3426                         s390_alcgr (code, ins->dreg, src2);
3427                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
3428                 }
3429                         break;
3430                 case OP_SUBCC: {
3431                         CHECK_SRCDST_NCOM;
3432                         s390_sgr (code, ins->dreg, src2);
3433                 }
3434                         break;
3435                 case OP_LSUB: {
3436                         CHECK_SRCDST_NCOM;
3437                         s390_sgr  (code, ins->dreg, src2);
3438                 }
3439                         break;
3440                 case OP_SBB: {
3441                         CHECK_SRCDST_NCOM;
3442                         s390_slbgr(code, ins->dreg, src2);
3443                 }
3444                         break;
3445                 case OP_SUB_IMM: {
3446                         if (ins->dreg != ins->sreg1) {
3447                                 s390_lgr   (code, ins->dreg, ins->sreg1);
3448                         }
3449                         if (s390_is_imm16 (-ins->inst_imm)) {
3450                                 s390_lghi  (code, s390_r0, ins->inst_imm);
3451                                 s390_slgr  (code, ins->dreg, s390_r0);
3452                         } else {
3453                                 s390_basr (code, s390_r13, 0);
3454                                 s390_j    (code, 6);
3455                                 s390_llong(code, ins->inst_imm);
3456                                 s390_slg  (code, ins->dreg, 0, s390_r13, 4);
3457                         }
3458                 }
3459                         break;
3460                 case OP_LSUB_IMM: {
3461                         if (ins->dreg != ins->sreg1) {
3462                                 s390_lgr   (code, ins->dreg, ins->sreg1);
3463                         }
3464                         if (s390_is_imm16 (-ins->inst_imm)) {
3465                                 s390_lghi  (code, s390_r0, ins->inst_imm);
3466                                 s390_slgr  (code, ins->dreg, s390_r0);
3467                         } else {
3468                                 s390_basr (code, s390_r13, 0);
3469                                 s390_j    (code, 6);
3470                                 s390_llong(code, ins->inst_imm);
3471                                 s390_slg  (code, ins->dreg, 0, s390_r13, 4);
3472                         }
3473                 }
3474                         break;
3475                 case OP_SBB_IMM: {
3476                         if (ins->dreg != ins->sreg1) {
3477                                 s390_lgr   (code, ins->dreg, ins->sreg1);
3478                         }
3479                         if (s390_is_imm16 (-ins->inst_imm)) {
3480                                 s390_lghi  (code, s390_r0, ins->inst_imm);
3481                                 s390_slbgr (code, ins->dreg, s390_r0);
3482                         } else {
3483                                 s390_basr (code, s390_r13, 0);
3484                                 s390_j    (code, 6);
3485                                 s390_llong(code, ins->inst_imm);
3486                                 s390_slbg (code, ins->dreg, 0, s390_r13, 4);
3487                         }
3488                 }
3489                         break;
3490                 case OP_SUB_OVF_CARRY: {
3491                         CHECK_SRCDST_NCOM;
3492                         s390_lghi  (code, s390_r0, 0);
3493                         s390_lgr   (code, s390_r1, s390_r0);
3494                         s390_slbgr (code, s390_r0, s390_r1);
3495                         s390_sgr   (code, ins->dreg, src2);
3496                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3497                         s390_agr   (code, ins->dreg, s390_r0);
3498                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3499                 }
3500                         break;
3501                 case OP_SUB_OVF_UN_CARRY: {
3502                         CHECK_SRCDST_NCOM;
3503                         s390_slbgr (code, ins->dreg, src2);
3504                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
3505                 }
3506                         break;
3507                 case OP_LAND: {
3508                         if (ins->sreg1 == ins->dreg) {
3509                                 s390_ngr  (code, ins->dreg, ins->sreg2);
3510                         }
3511                         else {
3512                                 if (ins->sreg2 == ins->dreg) {
3513                                         s390_ngr (code, ins->dreg, ins->sreg1);
3514                                 }
3515                                 else {
3516                                         s390_lgr (code, ins->dreg, ins->sreg1);
3517                                         s390_ngr (code, ins->dreg, ins->sreg2);
3518                                 }
3519                         }
3520                 }
3521                         break;
3522                 case OP_AND_IMM: {
3523                         if (ins->dreg != ins->sreg1) {
3524                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3525                         }
3526                         if (s390_is_imm16 (ins->inst_imm)) {
3527                                 s390_lghi  (code, s390_r0, ins->inst_imm);
3528                                 s390_ngr  (code, ins->dreg, s390_r0);
3529                         } else {
3530                                 s390_basr (code, s390_r13, 0);
3531                                 s390_j    (code, 6);
3532                                 s390_llong(code, ins->inst_imm);
3533                                 s390_ng   (code, ins->dreg, 0, s390_r13, 4);
3534                         }
3535                 }
3536                         break;
3537                 case OP_LDIV: {
3538                         s390_lgr  (code, s390_r1, ins->sreg1);
3539                         s390_dsgr (code, s390_r0, ins->sreg2);
3540                         s390_lgr  (code, ins->dreg, s390_r1);
3541                 }
3542                         break;
3543                 case OP_LDIV_UN: {
3544                         s390_lgr   (code, s390_r1, ins->sreg1);
3545                         s390_lghi  (code, s390_r0, 0);
3546                         s390_dlgr  (code, s390_r0, ins->sreg2);
3547                         s390_lgr   (code, ins->dreg, s390_r1);
3548                 }
3549                         break;
3550                 case OP_LREM: {
3551                         s390_lgr  (code, s390_r1, ins->sreg1);
3552                         s390_dsgr (code, s390_r0, ins->sreg2);
3553                         s390_lgr  (code, ins->dreg, s390_r0);
3554                         break;
3555                 }
3556                 case OP_LREM_UN: {
3557                         s390_lgr   (code, s390_r1, ins->sreg1);
3558                         s390_lghi  (code, s390_r0, 0);
3559                         s390_dlgr  (code, s390_r0, ins->sreg2);
3560                         s390_lgr   (code, ins->dreg, s390_r0);
3561                 }
3562                         break;
3563                 case OP_LOR: {
3564                         if (ins->sreg1 == ins->dreg) {
3565                                 s390_ogr  (code, ins->dreg, ins->sreg2);
3566                         }
3567                         else {
3568                                 if (ins->sreg2 == ins->dreg) {
3569                                         s390_ogr (code, ins->dreg, ins->sreg1);
3570                                 }
3571                                 else {
3572                                         s390_lgr (code, ins->dreg, ins->sreg1);
3573                                         s390_ogr (code, ins->dreg, ins->sreg2);
3574                                 }
3575                         }
3576                 }
3577                         break;
3578                 case OP_OR_IMM: {
3579                         if (ins->dreg != ins->sreg1) {
3580                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3581                         }
3582                         if (s390_is_imm16 (ins->inst_imm)) {
3583                                 s390_lghi (code, s390_r0, ins->inst_imm);
3584                                 s390_ogr  (code, ins->dreg, s390_r0);
3585                         } else {
3586                                 s390_basr (code, s390_r13, 0);
3587                                 s390_j    (code, 6);
3588                                 s390_llong(code, ins->inst_imm);
3589                                 s390_og   (code, ins->dreg, 0, s390_r13, 4);
3590                         }
3591                 }
3592                         break;
3593                 case OP_LXOR: {
3594                         if (ins->sreg1 == ins->dreg) {
3595                                 s390_xgr  (code, ins->dreg, ins->sreg2);
3596                         }
3597                         else {
3598                                 if (ins->sreg2 == ins->dreg) {
3599                                         s390_xgr (code, ins->dreg, ins->sreg1);
3600                                 }
3601                                 else {
3602                                         s390_lgr (code, ins->dreg, ins->sreg1);
3603                                         s390_xgr (code, ins->dreg, ins->sreg2);
3604                                 }
3605                         }
3606                 }
3607                         break;
3608                 case OP_XOR_IMM: {
3609                         if (ins->dreg != ins->sreg1) {
3610                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3611                         }
3612                         if (s390_is_imm16 (ins->inst_imm)) {
3613                                 s390_lghi  (code, s390_r0, ins->inst_imm);
3614                                 s390_xgr  (code, ins->dreg, s390_r0);
3615                         } else {
3616                                 s390_basr (code, s390_r13, 0);
3617                                 s390_j    (code, 6);
3618                                 s390_llong(code, ins->inst_imm);
3619                                 s390_xg   (code, ins->dreg, 0, s390_r13, 4);
3620                         }
3621                 }
3622                         break;
3623                 case OP_LSHL: {
3624                         CHECK_SRCDST_NCOM;
3625                         s390_sllg (code, ins->dreg, ins->dreg, src2, 0);
3626                 }
3627                         break;
3628                 case OP_SHL_IMM:
3629                 case OP_LSHL_IMM: {
3630                         if (ins->sreg1 != ins->dreg) {
3631                                 s390_lgr   (code, ins->dreg, ins->sreg1);
3632                         }
3633                         s390_sllg (code, ins->dreg, ins->dreg, 0, (ins->inst_imm & 0x3f));
3634                 }
3635                         break;
3636                 case OP_LSHR: {
3637                         CHECK_SRCDST_NCOM;
3638                         s390_srag  (code, ins->dreg, ins->dreg, src2, 0);
3639                 }
3640                         break;
3641                 case OP_SHR_IMM:
3642                 case OP_LSHR_IMM: {
3643                         if (ins->sreg1 != ins->dreg) {
3644                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3645                         }
3646                         s390_srag  (code, ins->dreg, ins->dreg, 0, (ins->inst_imm & 0x3f));
3647                 }
3648                         break;
3649                 case OP_SHR_UN_IMM:
3650                 case OP_LSHR_UN_IMM: {
3651                         if (ins->sreg1 != ins->dreg) {
3652                                 s390_lgr   (code, ins->dreg, ins->sreg1);
3653                         }
3654                         s390_srlg (code, ins->dreg, ins->dreg, 0, (ins->inst_imm & 0x3f));
3655                 }
3656                         break;
3657                 case OP_LSHR_UN: {
3658                         CHECK_SRCDST_NCOM;
3659                         s390_srlg (code, ins->dreg, ins->dreg, src2, 0);
3660                 }
3661                         break;
3662                 case OP_LNOT: {
3663                         if (ins->sreg1 != ins->dreg) {
3664                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3665                         }
3666                         s390_lghi (code, s390_r0, -1);
3667                         s390_xgr  (code, ins->dreg, s390_r0);
3668                 }
3669                         break;
3670                 case OP_LNEG: {
3671                         s390_lcgr (code, ins->dreg, ins->sreg1);
3672                 }
3673                         break;
3674                 case OP_LMUL: {
3675                         CHECK_SRCDST_COM;
3676                         s390_msgr (code, ins->dreg, src2);
3677                 }
3678                         break;
3679                 case OP_MUL_IMM:
3680                 case OP_LMUL_IMM: {
3681                         if (ins->dreg != ins->sreg1) {
3682                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3683                         }
3684                         if (s390_is_imm16 (ins->inst_imm)) {
3685                                 s390_lghi (code, s390_r13, ins->inst_imm);
3686                         } else {
3687                                 s390_basr (code, s390_r13, 0);
3688                                 s390_j    (code, 6);
3689                                 s390_llong(code, ins->inst_imm);
3690                                 s390_lg   (code, s390_r13, 0, s390_r13, 4);
3691                         }
3692                         s390_msgr (code, ins->dreg, s390_r13);
3693                 }
3694                         break;
3695                 case OP_LMUL_OVF: {
3696                         short int *o[2];
3697                         s390_ltgr (code, s390_r1, ins->sreg1);
3698                         s390_jz   (code, 0); CODEPTR(code, o[0]);
3699                         s390_ltgr (code, s390_r0, ins->sreg2);
3700                         s390_jnz  (code, 6);
3701                         s390_lghi (code, s390_r1, 0);
3702                         s390_j    (code, 0); CODEPTR(code, o[1]);
3703                         s390_xgr  (code, s390_r0, s390_r1);
3704                         s390_msgr (code, s390_r1, ins->sreg2);
3705                         s390_xgr  (code, s390_r0, s390_r1);
3706                         s390_srlg (code, s390_r0, s390_r0, 0, 63);
3707                         s390_ltgr (code, s390_r0, s390_r0);
3708                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3709                         PTRSLOT   (code, o[0]);
3710                         PTRSLOT   (code, o[1]);
3711                         s390_lgr  (code, ins->dreg, s390_r1);
3712                 }
3713                         break;
3714                 case OP_LMUL_OVF_UN: {
3715                         s390_lghi  (code, s390_r0, 0);
3716                         s390_lgr   (code, s390_r1, ins->sreg1);
3717                         s390_mlgr  (code, s390_r0, ins->sreg2);
3718                         s390_ltgr  (code, s390_r0, s390_r0);
3719                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3720                         s390_lgr   (code, ins->dreg, s390_r1);
3721                 }
3722                         break;
3723                 case OP_IADDCC: {
3724                         g_assert_not_reached ();
3725                         CHECK_SRCDST_COM_I;
3726                         s390_algr (code, ins->dreg, src2);
3727                 }
3728                         break;
3729                 case OP_IADD: {
3730                         CHECK_SRCDST_COM_I;
3731                         s390_agr  (code, ins->dreg, src2);
3732                 }
3733                         break;
3734                 case OP_IADC: {
3735                         g_assert_not_reached ();
3736                         CHECK_SRCDST_COM_I;
3737                         s390_alcgr (code, ins->dreg, src2);
3738                 }
3739                         break;
3740                 case OP_IADD_IMM: {
3741                         if (ins->dreg != ins->sreg1) {
3742                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3743                         }
3744                         if (s390_is_imm16 (ins->inst_imm)) {
3745                                 s390_aghi(code, ins->dreg, ins->inst_imm);
3746                         } else {
3747                                 s390_basr (code, s390_r13, 0);
3748                                 s390_j    (code, 4);
3749                                 s390_word (code, ins->inst_imm);
3750                                 s390_agf  (code, ins->dreg, 0, s390_r13, 4);
3751                         }
3752                 }
3753                         break;
3754                 case OP_IADC_IMM: {
3755                         if (ins->dreg != ins->sreg1) {
3756                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3757                         }
3758                         if (s390_is_imm16 (ins->inst_imm)) {
3759                                 s390_lghi  (code, s390_r0, ins->inst_imm);
3760                                 s390_alcgr (code, ins->dreg, s390_r0);
3761                         } else {
3762                                 s390_basr  (code, s390_r13, 0);
3763                                 s390_j     (code, 4);
3764                                 s390_word  (code, ins->inst_imm);
3765                                 s390_lgf   (code, s390_r13, 0, s390_r13, 4);
3766                                 s390_alcgr (code, ins->dreg, s390_r13);
3767                         }
3768                 }
3769                         break;
3770                 case OP_LADD_OVF:
3771                 case OP_S390_LADD_OVF: {
3772                         CHECK_SRCDST_COM;
3773                         s390_agr    (code, ins->dreg, src2);
3774                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3775                 }
3776                         break;
3777                 case OP_LADD_OVF_UN:
3778                 case OP_S390_LADD_OVF_UN: {
3779                         CHECK_SRCDST_COM;
3780                         s390_algr  (code, ins->dreg, src2);
3781                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
3782                 }
3783                         break;
3784                 case OP_ISUBCC: {
3785                         CHECK_SRCDST_NCOM_I;
3786                         s390_slgr (code, ins->dreg, src2);
3787                 }
3788                         break;
3789                 case OP_ISUB: {
3790                         CHECK_SRCDST_NCOM_I;
3791                         s390_sgr  (code, ins->dreg, src2);
3792                 }
3793                         break;
3794                 case OP_ISBB: {
3795                         CHECK_SRCDST_NCOM_I;
3796                         s390_slbgr (code, ins->dreg, src2);
3797                 }
3798                         break;
3799                 case OP_ISUB_IMM: {
3800                         if (ins->dreg != ins->sreg1) {
3801                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3802                         }
3803                         if (s390_is_imm16 (-ins->inst_imm)) {
3804                                 s390_aghi (code, ins->dreg, -ins->inst_imm);
3805                         } else {
3806                                 s390_basr (code, s390_r13, 0);
3807                                 s390_j    (code, 4);
3808                                 s390_word (code, ins->inst_imm);
3809                                 s390_sgf  (code, ins->dreg, 0, s390_r13, 4);
3810                         }
3811                 }
3812                         break;
3813                 case OP_ISBB_IMM: {
3814                         s390_basr (code, s390_r13, 0);
3815                         s390_j    (code, 4);
3816                         s390_word (code, ins->inst_imm);
3817                         s390_slgf (code, ins->dreg, 0, s390_r13, 4);
3818                 }
3819                         break;
3820                 case OP_ISUB_OVF:
3821                 case OP_S390_ISUB_OVF: {
3822                         CHECK_SRCDST_NCOM;
3823                         s390_sr   (code, ins->dreg, src2);
3824                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3825                         s390_lgfr (code, ins->dreg, ins->dreg);
3826                 }
3827                         break;
3828                 case OP_ISUB_OVF_UN:
3829                 case OP_S390_ISUB_OVF_UN: {
3830                         CHECK_SRCDST_NCOM;
3831                         s390_slr  (code, ins->dreg, src2);
3832                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
3833                         s390_llgfr(code, ins->dreg, ins->dreg);
3834                 }
3835                         break;
3836                 case OP_LSUB_OVF:
3837                 case OP_S390_LSUB_OVF: {
3838                         CHECK_SRCDST_NCOM;
3839                         s390_sgr   (code, ins->dreg, src2);
3840                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3841                 }
3842                         break;
3843                 case OP_LSUB_OVF_UN:
3844                 case OP_S390_LSUB_OVF_UN: {
3845                         CHECK_SRCDST_NCOM;
3846                         s390_slgr  (code, ins->dreg, src2);
3847                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
3848                 }
3849                         break;
3850                 case OP_IAND: {
3851                         CHECK_SRCDST_NCOM_I;
3852                         s390_ngr (code, ins->dreg, src2);
3853                 }
3854                         break;
3855                 case OP_IAND_IMM: {
3856                         if (ins->dreg != ins->sreg1) {
3857                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3858                         }
3859                         if (s390_is_imm16 (ins->inst_imm)) {
3860                                 s390_lghi (code, s390_r0, ins->inst_imm);
3861                                 s390_ngr  (code, ins->dreg, s390_r0);
3862                         } else {
3863                                 s390_basr (code, s390_r13, 0);
3864                                 s390_j    (code, 6);
3865                                 s390_llong(code, ins->inst_imm);
3866                                 s390_ng   (code, ins->dreg, 0, s390_r13, 4);
3867                         }
3868                 }
3869                         break;
3870                 case OP_IDIV: {
3871                         s390_lgfr (code, s390_r0, ins->sreg1);
3872                         s390_srda (code, s390_r0, 0, 32);
3873                         s390_dr   (code, s390_r0, ins->sreg2);
3874                         s390_lgfr (code, ins->dreg, s390_r1);
3875                 }
3876                         break;
3877                 case OP_IDIV_UN: {
3878                         s390_lgfr (code, s390_r0, ins->sreg1);
3879                         s390_srdl (code, s390_r0, 0, 32);
3880                         s390_dlr  (code, s390_r0, ins->sreg2);
3881                         s390_lgfr (code, ins->dreg, s390_r1);
3882                 }
3883                         break;
3884                 case OP_IDIV_IMM: {
3885                         if (s390_is_imm16 (ins->inst_imm)) {
3886                                 s390_lghi (code, s390_r13, ins->inst_imm);
3887                                 s390_lgfr (code, s390_r0, ins->sreg1);
3888                         } else {
3889                                 s390_basr (code, s390_r13, 0);
3890                                 s390_j    (code, 4);
3891                                 s390_word (code, ins->inst_imm);
3892                                 s390_lgfr (code, s390_r0, ins->sreg1);
3893                                 s390_lgf  (code, s390_r13, 0, s390_r13, 4);
3894                         }
3895                         s390_srda (code, s390_r0, 0, 32);
3896                         s390_dr   (code, s390_r0, ins->sreg2);
3897                         s390_lgfr (code, ins->dreg, s390_r1);
3898                 }
3899                         break;
3900                 case OP_IREM: {
3901                         s390_lgfr (code, s390_r0, ins->sreg1);
3902                         s390_srda (code, s390_r0, 0, 32);
3903                         s390_dr   (code, s390_r0, ins->sreg2);
3904                         s390_lgfr (code, ins->dreg, s390_r0);
3905                         break;
3906                 case OP_IREM_UN:
3907                         s390_lgfr (code, s390_r0, ins->sreg1);
3908                         s390_srdl (code, s390_r0, 0, 32);
3909                         s390_dlr  (code, s390_r0, ins->sreg2);
3910                         s390_lgfr (code, ins->dreg, s390_r0);
3911                 }
3912                         break;
3913                 case OP_IREM_IMM: {
3914                         if (s390_is_imm16 (ins->inst_imm)) {
3915                                 s390_lghi (code, s390_r13, ins->inst_imm);
3916                                 s390_lgfr (code, s390_r0, ins->sreg1);
3917                         } else {
3918                                 s390_basr (code, s390_r13, 0);
3919                                 s390_j    (code, 4);
3920                                 s390_word (code, ins->inst_imm);
3921                                 s390_lgfr (code, s390_r0, ins->sreg1);
3922                                 s390_lgf  (code, s390_r13, 0, s390_r13, 4);
3923                         }
3924                         s390_srda (code, s390_r0, 0, 32);
3925                         s390_dr   (code, s390_r0, ins->sreg2);
3926                         s390_lgfr (code, ins->dreg, s390_r0);
3927                 }
3928                         break;
3929                 case OP_IOR: {
3930                         CHECK_SRCDST_COM_I;
3931                         s390_ogr (code, ins->dreg, src2);
3932                 }
3933                         break;
3934                 case OP_IOR_IMM: {
3935                         if (ins->dreg != ins->sreg1) {
3936                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3937                         }
3938                         if (s390_is_imm16 (ins->inst_imm)) {
3939                                 s390_lghi (code, s390_r0, ins->inst_imm);
3940                                 s390_ogr  (code, ins->dreg, s390_r0);
3941                         } else {
3942                                 s390_basr (code, s390_r13, 0);
3943                                 s390_j    (code, 6);
3944                                 s390_llong(code, ins->inst_imm);
3945                                 s390_og   (code, ins->dreg, 0, s390_r13, 4);
3946                         }
3947                 }
3948                         break;
3949                 case OP_IXOR: {
3950                         CHECK_SRCDST_COM_I;
3951                         s390_xgr (code, ins->dreg, src2);
3952                 }
3953                         break;
3954                 case OP_IXOR_IMM: {
3955                         if (ins->dreg != ins->sreg1) {
3956                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3957                         }
3958                         if (s390_is_imm16 (ins->inst_imm)) {
3959                                 s390_lghi (code, s390_r0, ins->inst_imm);
3960                                 s390_xgr  (code, ins->dreg, s390_r0);
3961                         } else {
3962                                 s390_basr (code, s390_r13, 0);
3963                                 s390_j    (code, 6);
3964                                 s390_llong(code, ins->inst_imm);
3965                                 s390_xg   (code, ins->dreg, 0, s390_r13, 4);
3966                         }
3967                 }
3968                         break;
3969                 case OP_ISHL: {
3970                         CHECK_SRCDST_NCOM;
3971                         s390_sll  (code, ins->dreg, src2, 0);
3972                 }
3973                         break;
3974                 case OP_ISHL_IMM: {
3975                         if (ins->sreg1 != ins->dreg) {
3976                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3977                         }
3978                         s390_sll (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3979                 }
3980                         break;
3981                 case OP_ISHR: {
3982                         CHECK_SRCDST_NCOM;
3983                         s390_sra (code, ins->dreg, src2, 0);
3984                 }
3985                         break;
3986                 case OP_ISHR_IMM: {
3987                         if (ins->sreg1 != ins->dreg) {
3988                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3989                         }
3990                         s390_sra (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3991                 }
3992                         break;
3993                 case OP_ISHR_UN_IMM: {
3994                         if (ins->sreg1 != ins->dreg) {
3995                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3996                         }
3997                         s390_srl (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3998                 }
3999                         break;
4000                 case OP_ISHR_UN: {
4001                         CHECK_SRCDST_NCOM;
4002                         s390_srl  (code, ins->dreg, src2, 0);
4003                 }
4004                         break;
4005                 case OP_INOT: {
4006                         if (ins->sreg1 != ins->dreg) {
4007                                 s390_lgfr (code, ins->dreg, ins->sreg1);
4008                         }
4009                         s390_lghi (code, s390_r0, -1);
4010                         s390_xgr  (code, ins->dreg, s390_r0);
4011                 }
4012                         break;
4013                 case OP_INEG: {
4014                         s390_lcgr (code, ins->dreg, ins->sreg1);
4015                 }
4016                         break;
4017                 case OP_IMUL: {
4018                         CHECK_SRCDST_COM_I;
4019                         s390_msr (code, ins->dreg, src2);
4020                 }
4021                         break;
4022                 case OP_IMUL_IMM: {
4023                         if (ins->dreg != ins->sreg1) {
4024                                 s390_lgfr (code, ins->dreg, ins->sreg1);
4025                         }
4026                         if (s390_is_imm16 (ins->inst_imm)) {
4027                                 s390_lghi (code, s390_r13, ins->inst_imm);
4028                         } else {
4029                                 s390_basr (code, s390_r13, 0);
4030                                 s390_j    (code, 4);
4031                                 s390_word (code, ins->inst_imm);
4032                                 s390_lgf  (code, s390_r13, 0, s390_r13, 4);
4033                         }
4034                         s390_msr  (code, ins->dreg, s390_r13);
4035                 }
4036                         break;
4037                 case OP_IMUL_OVF: {
4038                         short int *o[2];
4039                         s390_ltr  (code, s390_r1, ins->sreg1);
4040                         s390_jz   (code, 0); CODEPTR(code, o[0]);
4041                         s390_ltr  (code, s390_r0, ins->sreg2);
4042                         s390_jnz  (code, 6);
4043                         s390_lhi  (code, s390_r1, 0);
4044                         s390_j    (code, 0); CODEPTR(code, o[1]);
4045                         s390_xr   (code, s390_r0, s390_r1);
4046                         s390_msr  (code, s390_r1, ins->sreg2);
4047                         s390_xr   (code, s390_r0, s390_r1);
4048                         s390_srl  (code, s390_r0, 0, 31);
4049                         s390_ltr  (code, s390_r0, s390_r0);
4050                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
4051                         PTRSLOT   (code, o[0]);
4052                         PTRSLOT   (code, o[1]);
4053                         s390_lgfr (code, ins->dreg, s390_r1);
4054                 }
4055                         break;
4056                 case OP_IMUL_OVF_UN: {
4057                         s390_lhi  (code, s390_r0, 0);
4058                         s390_lr   (code, s390_r1, ins->sreg1);
4059                         s390_mlr  (code, s390_r0, ins->sreg2);
4060                         s390_ltr  (code, s390_r0, s390_r0);
4061                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
4062                         s390_lgfr (code, ins->dreg, s390_r1);
4063                 }
4064                         break;
4065                 case OP_ICONST:
4066                 case OP_I8CONST: {
4067                         if (s390_is_imm16(ins->inst_c0)) {
4068                                 s390_lghi (code, ins->dreg, ins->inst_c0);
4069                         } else {
4070                                 s390_basr (code, s390_r13, 0);
4071                                 s390_j    (code, 6);
4072                                 s390_llong(code, ins->inst_c0);
4073                                 s390_lg   (code, ins->dreg, 0, s390_r13, 4);
4074                         }
4075                 }
4076                         break;
4077                 case OP_AOTCONST: {
4078                         s390_basr (code, s390_r13, 0);
4079                         s390_j    (code, 6);
4080                         mono_add_patch_info (cfg, code - cfg->native_code,
4081                                 (MonoJumpInfoType)ins->inst_i1, ins->inst_p0);
4082                         s390_llong(code, 0);
4083                         s390_lg   (code,ins->dreg, 0, s390_r13, 4);
4084                 }
4085                         break;
4086                 case OP_JUMP_TABLE: {
4087                         mono_add_patch_info (cfg, code - cfg->native_code,
4088                                 (MonoJumpInfoType)ins->inst_i1, ins->inst_p0);
4089                         s390_basr  (code, s390_r13, 0);
4090                         s390_j     (code, 6);
4091                         s390_llong (code, 0);
4092                         s390_lg    (code, ins->dreg, 0, s390_r13, 4);
4093                 }
4094                         break;
4095                 case OP_MOVE:
4096                         if (ins->dreg != ins->sreg1) {
4097                                 s390_lgr (code, ins->dreg, ins->sreg1);
4098                         }
4099                         break;
4100                 case OP_LCONV_TO_I:
4101                 case OP_LCONV_TO_I8:
4102                 case OP_SEXT_I4:
4103                         s390_lgfr (code, ins->dreg, ins->sreg1);
4104                         break;
4105                 case OP_LCONV_TO_I4:
4106                         s390_lgfr (code, ins->dreg, ins->sreg1);
4107                         break;
4108                 case OP_LCONV_TO_U:
4109                 case OP_LCONV_TO_U8:
4110                 case OP_LCONV_TO_U4:
4111                 case OP_ZEXT_I4:
4112                         s390_llgfr (code, ins->dreg, ins->sreg1);
4113                         break;
4114                 case OP_LCONV_TO_OVF_U4:
4115                         s390_basr (code, s390_r13, 0);
4116                         s390_j    (code, 6);
4117                         s390_llong(code, 4294967295);
4118                         s390_clg  (code, ins->sreg1, 0, s390_r13, 4);
4119                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GT, "OverflowException");
4120                         s390_ltgr (code, ins->sreg1, ins->sreg1);
4121                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, "OverflowException");
4122                         s390_llgfr(code, ins->dreg, ins->sreg1);
4123                         break;
4124                 case OP_LCONV_TO_OVF_I4_UN:
4125                         s390_basr (code, s390_r13, 0);
4126                         s390_j    (code, 6);
4127                         s390_llong(code, 2147483647);
4128                         s390_cg   (code, ins->sreg1, 0, s390_r13, 4);
4129                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GT, "OverflowException");
4130                         s390_ltgr (code, ins->sreg1, ins->sreg1);
4131                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, "OverflowException");
4132                         s390_lgfr (code, ins->dreg, ins->sreg1);
4133                         break;
4134                 case OP_FMOVE:
4135                 case OP_FCONV_TO_R4: {
4136                         if (ins->dreg != ins->sreg1) {
4137                                 s390_ldr   (code, ins->dreg, ins->sreg1);
4138                         }
4139                 }
4140                         break;
4141                 case OP_S390_SETF4RET: {
4142                         s390_ledbr (code, ins->dreg, ins->sreg1);
4143                 }
4144                         break;
4145                 case OP_TLS_GET: {
4146                         if (s390_is_imm16 (ins->inst_offset)) {
4147                                 s390_lghi (code, s390_r13, ins->inst_offset);
4148                         } else {
4149                                 s390_bras (code, s390_r13, 0);
4150                                 s390_j    (code, 4);
4151                                 s390_llong(code, ins->inst_offset);
4152                                 s390_lg   (code, s390_r13, 0, s390_r13, 4);
4153                         }
4154                         s390_ear (code, s390_r1, 0);
4155                         s390_sllg(code, s390_r1, s390_r1, 0, 32);
4156                         s390_ear (code, s390_r1, 1);
4157                         s390_lg  (code, ins->dreg, s390_r13, s390_r1, 0);
4158                 }
4159                         break;
4160                 case OP_JMP: {
4161                         if (cfg->method->save_lmf)
4162                                 restoreLMF(code, cfg->frame_reg, cfg->stack_usage);
4163
4164                         if (cfg->flags & MONO_CFG_HAS_TAIL) {
4165                                 code =  emit_load_volatile_arguments (code, cfg);
4166                         }
4167
4168                         code = backUpStackPtr(cfg, code);
4169                         s390_lg  (code, s390_r14, 0, cfg->frame_reg, S390_RET_ADDR_OFFSET);
4170                         mono_add_patch_info (cfg, code - cfg->native_code,
4171                                              MONO_PATCH_INFO_METHOD_JUMP,
4172                                              ins->inst_p0);
4173                         s390_jcl (code, S390_CC_UN, 0);
4174                 }
4175                         break;
4176                 case OP_CHECK_THIS: {
4177                         /* ensure ins->sreg1 is not NULL */
4178                         s390_lg   (code, s390_r0, 0, ins->sreg1, 0);
4179                         s390_ltgr (code, s390_r0, s390_r0);
4180                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_ZR, "NullReferenceException");
4181                 }
4182                         break;
4183                 case OP_ARGLIST: {
4184                         int offset = cfg->sig_cookie + cfg->stack_usage;
4185
4186                         if (s390_is_imm16 (offset))
4187                                 s390_lghi (code, s390_r0, offset);
4188                         else {
4189                                 s390_basr (code, s390_r13, 0);
4190                                 s390_j    (code, 6);
4191                                 s390_llong(code, offset);
4192                                 s390_lg   (code, s390_r0, 0, s390_r13, 0);
4193                         }
4194                         s390_agr  (code, s390_r0, cfg->frame_reg);
4195                         s390_stg  (code, s390_r0, 0, ins->sreg1, 0);
4196                 }
4197                         break;
4198                 case OP_FCALL: {
4199                         s390_basr (code, s390_r13, 0);
4200                         s390_j    (code, 6);
4201                         call = (MonoCallInst*)ins;
4202                         if (ins->flags & MONO_INST_HAS_METHOD)
4203                                 mono_add_patch_info (cfg, code-cfg->native_code,
4204                                                      MONO_PATCH_INFO_METHOD,
4205                                                      call->method);
4206                         else
4207                                 mono_add_patch_info (cfg, code-cfg->native_code,
4208                                                      MONO_PATCH_INFO_ABS,
4209                                                      call->fptr);
4210                         s390_llong(code, 0);
4211                         s390_lg   (code, s390_r14, 0, s390_r13, 4);
4212                         s390_basr (code, s390_r14, s390_r14);
4213                         if (call->signature->ret->type == MONO_TYPE_R4)
4214                                 s390_ldebr (code, s390_f0, s390_f0);
4215                 }
4216                         break;
4217                 case OP_LCALL:
4218                 case OP_VCALL:
4219                 case OP_VCALL2:
4220                 case OP_VOIDCALL:
4221                 case OP_CALL: {
4222                         s390_basr (code, s390_r13, 0);
4223                         s390_j    (code, 6);
4224                         call = (MonoCallInst*)ins;
4225                         if (ins->flags & MONO_INST_HAS_METHOD)
4226                                 mono_add_patch_info (cfg, code-cfg->native_code,
4227                                                      MONO_PATCH_INFO_METHOD,
4228                                                      call->method);
4229                         else
4230                                 mono_add_patch_info (cfg, code-cfg->native_code,
4231                                                      MONO_PATCH_INFO_ABS,
4232                                                      call->fptr);
4233                         s390_llong(code, 0);
4234                         s390_lg   (code, s390_r14, 0, s390_r13, 4);
4235                         s390_basr (code, s390_r14, s390_r14);
4236                 }
4237                         break;
4238                 case OP_FCALL_REG: {
4239                         call = (MonoCallInst*)ins;
4240                         s390_lgr  (code, s390_r1, ins->sreg1);
4241                         s390_basr (code, s390_r14, s390_r1);
4242                         if (call->signature->ret->type == MONO_TYPE_R4)
4243                                 s390_ldebr (code, s390_f0, s390_f0);
4244                 }
4245                         break;
4246                 case OP_LCALL_REG:
4247                 case OP_VCALL_REG:
4248                 case OP_VCALL2_REG:
4249                 case OP_VOIDCALL_REG:
4250                 case OP_CALL_REG: {
4251                         s390_lgr  (code, s390_r1, ins->sreg1);
4252                         s390_basr (code, s390_r14, s390_r1);
4253                 }
4254                         break;
4255                 case OP_FCALL_MEMBASE: {
4256                         call = (MonoCallInst*)ins;
4257                         s390_lg   (code, s390_r1, 0, ins->sreg1, ins->inst_offset);
4258                         s390_basr (code, s390_r14, s390_r1);
4259                         if (call->signature->ret->type == MONO_TYPE_R4)
4260                                 s390_ldebr (code, s390_f0, s390_f0);
4261                 }
4262                         break;
4263                 case OP_LCALL_MEMBASE:
4264                 case OP_VCALL_MEMBASE:
4265                 case OP_VCALL2_MEMBASE:
4266                 case OP_VOIDCALL_MEMBASE:
4267                 case OP_CALL_MEMBASE: {
4268                         s390_lg   (code, s390_r1, 0, ins->sreg1, ins->inst_offset);
4269                         s390_basr (code, s390_r14, s390_r1);
4270                 }
4271                         break;
4272                 case OP_LOCALLOC: {
4273                         int alloca_skip;
4274                         int area_offset;
4275
4276                         if (cfg->param_area == 0)
4277                                 alloca_skip = S390_MINIMAL_STACK_SIZE;
4278                         else
4279                                 alloca_skip = cfg->param_area;
4280
4281                         area_offset = S390_ALIGN(alloca_skip, S390_STACK_ALIGNMENT);
4282                         s390_lgr  (code, s390_r1, ins->sreg1);
4283                         if (ins->flags & MONO_INST_INIT)
4284                                 s390_lgr  (code, s390_r0, ins->sreg1);
4285                         s390_aghi (code, s390_r1, 14);
4286                         s390_srlg (code, s390_r1, s390_r1, 0, 3);
4287                         s390_sllg (code, s390_r1, s390_r1, 0, 3);
4288                         if (cfg->method->save_lmf) {
4289                                 /*----------------------------------*/
4290                                 /* we have to adjust lmf ebp value  */
4291                                 /*----------------------------------*/
4292                                 int lmfOffset = cfg->stack_usage - sizeof(MonoLMF);
4293
4294                                 s390_lgr (code, s390_r13, cfg->frame_reg);
4295                                 if (s390_is_imm16(lmfOffset))
4296                                         s390_aghi (code, s390_r13, lmfOffset);
4297                                 else {
4298                                         s390_basr (code, s390_r14, 0);
4299                                         s390_j    (code, 4);
4300                                         s390_word (code, lmfOffset);
4301                                         s390_agf  (code, s390_r13, 0, s390_r14, 4);
4302                                 }
4303                                 s390_lgr (code, s390_r14, STK_BASE);
4304                                 s390_sgr (code, s390_r14, s390_r1);
4305                                 s390_stg (code, s390_r14, 0, s390_r13,
4306                                           G_STRUCT_OFFSET(MonoLMF, ebp));
4307                         }
4308                         s390_lg   (code, s390_r13, 0, STK_BASE, 0);
4309                         s390_sgr  (code, STK_BASE, s390_r1);
4310                         s390_stg  (code, s390_r13, 0, STK_BASE, 0);
4311                         s390_la   (code, ins->dreg, 0, STK_BASE, area_offset);
4312                         s390_srlg (code, ins->dreg, ins->dreg, 0, 3);
4313                         s390_sllg (code, ins->dreg, ins->dreg, 0, 3);
4314                         if (ins->flags & MONO_INST_INIT) {
4315                                 s390_lgr  (code, s390_r1, s390_r0);
4316                                 s390_lgr  (code, s390_r0, ins->dreg);
4317                                 s390_lgr  (code, s390_r14, s390_r12);
4318                                 s390_lghi (code, s390_r13, 0);
4319                                 s390_mvcle(code, s390_r0, s390_r12, 0, 0);
4320                                 s390_jo   (code, -2);
4321                                 s390_lgr  (code, s390_r12, s390_r14);
4322                         }
4323                 }
4324                         break;
4325                 case OP_THROW: {
4326                         s390_lgr  (code, s390_r2, ins->sreg1);
4327                         s390_basr (code, s390_r13, 0);
4328                         s390_j    (code, 6);
4329                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD,
4330                                              (gpointer) "mono_arch_throw_exception");
4331                         s390_llong(code, 0);
4332                         s390_lg   (code, s390_r14, 0, s390_r13, 4);
4333                         s390_basr (code, s390_r14, s390_r14);
4334                 }
4335                         break;
4336                 case OP_RETHROW: {
4337                         s390_lgr  (code, s390_r2, ins->sreg1);
4338                         s390_basr (code, s390_r13, 0);
4339                         s390_j    (code, 6);
4340                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD,
4341                                              (gpointer) "mono_arch_rethrow_exception");
4342                         s390_llong(code, 0);
4343                         s390_lg   (code, s390_r14, 0, s390_r13, 4);
4344                         s390_basr (code, s390_r14, s390_r14);
4345                 }
4346                         break;
4347                 case OP_START_HANDLER: {
4348                         MonoInst *spvar = mono_find_spvar_for_region (cfg, bb->region);
4349
4350                         S390_LONG (code, stg, stg, s390_r14, 0,
4351                                    spvar->inst_basereg,
4352                                    spvar->inst_offset);
4353                 }
4354                         break;
4355                 case OP_ENDFILTER: {
4356                         MonoInst *spvar = mono_find_spvar_for_region (cfg, bb->region);
4357
4358                         if (ins->sreg1 != s390_r2)
4359                                 s390_lgr(code, s390_r2, ins->sreg1);
4360                         S390_LONG (code, lg, lg, s390_r14, 0,
4361                                    spvar->inst_basereg,
4362                                    spvar->inst_offset);
4363                         s390_br  (code, s390_r14);
4364                 }
4365                         break;
4366                 case OP_ENDFINALLY: {
4367                         MonoInst *spvar = mono_find_spvar_for_region (cfg, bb->region);
4368
4369                         S390_LONG (code, lg, lg, s390_r14, 0,
4370                                    spvar->inst_basereg,
4371                                    spvar->inst_offset);
4372                         s390_br  (code, s390_r14);
4373                 }
4374                         break;
4375                 case OP_CALL_HANDLER: {
4376                         mono_add_patch_info (cfg, code-cfg->native_code,
4377                                              MONO_PATCH_INFO_BB, ins->inst_target_bb);
4378                         s390_brasl (code, s390_r14, 0);
4379                         mono_cfg_add_try_hole (cfg, ins->inst_eh_block, code, bb);
4380                 }
4381                         break;
4382                 case OP_LABEL: {
4383                         ins->inst_c0 = code - cfg->native_code;
4384                 }
4385                         break;
4386                 case OP_RELAXED_NOP:
4387                 case OP_NOP:
4388                 case OP_DUMMY_USE:
4389                 case OP_DUMMY_STORE:
4390                 case OP_NOT_REACHED:
4391                 case OP_NOT_NULL: {
4392                 }
4393                         break;
4394                 case OP_SEQ_POINT: {
4395                         int i;
4396
4397                         if (cfg->compile_aot)
4398                                 NOT_IMPLEMENTED;
4399
4400                         /*
4401                          * Read from the single stepping trigger page. This will cause a
4402                          * SIGSEGV when single stepping is enabled.
4403                          * We do this _before_ the breakpoint, so single stepping after
4404                          * a breakpoint is hit will step to the next IL offset.
4405                          */
4406                         if (ins->flags & MONO_INST_SINGLE_STEP_LOC) {
4407                                 breakpointCode.pTrigger = ss_trigger_page;
4408                                 memcpy(code, (void *) &breakpointCode, BREAKPOINT_SIZE);
4409                                 code += BREAKPOINT_SIZE;
4410                         }
4411
4412                         mono_add_seq_point (cfg, bb, ins, code - cfg->native_code);
4413
4414                         /*
4415                          * A placeholder for a possible breakpoint inserted by
4416                          * mono_arch_set_breakpoint ().
4417                          */
4418                         for (i = 0; i < (BREAKPOINT_SIZE / S390X_NOP_SIZE); ++i)
4419                                 s390_nop (code);
4420                         break;
4421                 }
4422
4423                 case OP_BR:
4424                         EMIT_UNCOND_BRANCH(ins);
4425                         break;
4426                 case OP_BR_REG: {
4427                         s390_br  (code, ins->sreg1);
4428                 }
4429                         break;
4430                 case OP_CEQ:
4431                 case OP_ICEQ:
4432                 case OP_LCEQ: {
4433                         s390_lghi(code, ins->dreg, 1);
4434                         s390_jz  (code, 4);
4435                         s390_lghi(code, ins->dreg, 0);
4436                 }
4437                         break;
4438                 case OP_CLT:
4439                 case OP_ICLT:
4440                 case OP_LCLT: {
4441                         s390_lghi(code, ins->dreg, 1);
4442                         s390_jl  (code, 4);
4443                         s390_lghi(code, ins->dreg, 0);
4444                 }
4445                         break;
4446                 case OP_CLT_UN:
4447                 case OP_ICLT_UN:
4448                 case OP_LCLT_UN: {
4449                         s390_lghi(code, ins->dreg, 1);
4450                         s390_jlo (code, 4);
4451                         s390_lghi(code, ins->dreg, 0);
4452                 }
4453                         break;
4454                 case OP_CGT:
4455                 case OP_ICGT:
4456                 case OP_LCGT: {
4457                         s390_lghi(code, ins->dreg, 1);
4458                         s390_jh  (code, 4);
4459                         s390_lghi(code, ins->dreg, 0);
4460                 }
4461                         break;
4462                 case OP_CGT_UN:
4463                 case OP_ICGT_UN:
4464                 case OP_LCGT_UN: {
4465                         s390_lghi(code, ins->dreg, 1);
4466                         s390_jho (code, 4);
4467                         s390_lghi(code, ins->dreg, 0);
4468                 }
4469                         break;
4470                 case OP_COND_EXC_EQ:
4471                 case OP_COND_EXC_IEQ:
4472                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_EQ, ins->inst_p1);
4473                         break;
4474                 case OP_COND_EXC_NE_UN:
4475                 case OP_COND_EXC_INE_UN:
4476                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NE, ins->inst_p1);
4477                         break;
4478                 case OP_COND_EXC_LT:
4479                 case OP_COND_EXC_ILT:
4480                 case OP_COND_EXC_LT_UN:
4481                 case OP_COND_EXC_ILT_UN:
4482                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, ins->inst_p1);
4483                         break;
4484                 case OP_COND_EXC_GT:
4485                 case OP_COND_EXC_IGT:
4486                 case OP_COND_EXC_GT_UN:
4487                 case OP_COND_EXC_IGT_UN:
4488                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GT, ins->inst_p1);
4489                         break;
4490                 case OP_COND_EXC_GE:
4491                 case OP_COND_EXC_IGE:
4492                 case OP_COND_EXC_GE_UN:
4493                 case OP_COND_EXC_IGE_UN:
4494                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GE, ins->inst_p1);
4495                         break;
4496                 case OP_COND_EXC_LE:
4497                 case OP_COND_EXC_ILE:
4498                 case OP_COND_EXC_LE_UN:
4499                 case OP_COND_EXC_ILE_UN:
4500                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LE, ins->inst_p1);
4501                         break;
4502                 case OP_COND_EXC_OV:
4503                 case OP_COND_EXC_IOV:
4504                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, ins->inst_p1);
4505                         break;
4506                 case OP_COND_EXC_NO:
4507                 case OP_COND_EXC_INO:
4508                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NO, ins->inst_p1);
4509                         break;
4510                 case OP_COND_EXC_C:
4511                 case OP_COND_EXC_IC:
4512                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, ins->inst_p1);
4513                         break;
4514                 case OP_COND_EXC_NC:
4515                 case OP_COND_EXC_INC:
4516                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, ins->inst_p1);
4517                         break;
4518                 case OP_LBEQ:
4519                 case OP_IBEQ:
4520                         EMIT_COND_BRANCH (ins, S390_CC_EQ);
4521                         break;
4522                 case OP_LBNE_UN:
4523                 case OP_IBNE_UN:
4524                         EMIT_COND_BRANCH (ins, S390_CC_NE);
4525                         break;
4526                 case OP_LBLT:
4527                 case OP_LBLT_UN:
4528                 case OP_IBLT:
4529                 case OP_IBLT_UN:
4530                         EMIT_COND_BRANCH (ins, S390_CC_LT);
4531                         break;
4532                 case OP_LBGT:
4533                 case OP_LBGT_UN:
4534                 case OP_IBGT:
4535                 case OP_IBGT_UN:
4536                         EMIT_COND_BRANCH (ins, S390_CC_GT);
4537                         break;
4538                 case OP_LBGE:
4539                 case OP_LBGE_UN:
4540                 case OP_IBGE:
4541                 case OP_IBGE_UN:
4542                         EMIT_COND_BRANCH (ins, S390_CC_GE);
4543                         break;
4544                 case OP_LBLE:
4545                 case OP_LBLE_UN:
4546                 case OP_IBLE:
4547                 case OP_IBLE_UN:
4548                         EMIT_COND_BRANCH (ins, S390_CC_LE);
4549                         break;
4550
4551                 /* floating point opcodes */
4552                 case OP_R8CONST: {
4553                         if (*((double *) ins->inst_p0) == 0) {
4554                                 s390_lzdr (code, ins->dreg);
4555                         } else {
4556                                 s390_basr  (code, s390_r13, 0);
4557                                 s390_j     (code, 6);
4558                                 s390_llong (code, ins->inst_p0);
4559                                 s390_lg    (code, s390_r13, 0, s390_r13, 4);
4560                                 s390_ld    (code, ins->dreg, 0, s390_r13, 0);
4561                         }
4562                 }
4563                         break;
4564                 case OP_R4CONST: {
4565                         if (*((float *) ins->inst_p0) == 0) {
4566                                 s390_lzdr (code, ins->dreg);
4567                         } else {
4568                                 s390_basr (code, s390_r13, 0);
4569                                 s390_j    (code, 6);
4570                                 s390_llong(code, ins->inst_p0);
4571                                 s390_lg   (code, s390_r13, 0, s390_r13, 4);
4572                                 s390_ldeb (code, ins->dreg, 0, s390_r13, 0);
4573                         }
4574                 }
4575                         break;
4576                 case OP_STORER8_MEMBASE_REG: {
4577                         S390_LONG (code, stdy, std, ins->sreg1, 0,
4578                                    ins->inst_destbasereg, ins->inst_offset);
4579                 }
4580                         break;
4581                 case OP_LOADR8_MEMBASE: {
4582                         S390_LONG (code, ldy, ld, ins->dreg, 0,
4583                                    ins->inst_basereg, ins->inst_offset);
4584                 }
4585                         break;
4586                 case OP_STORER4_MEMBASE_REG: {
4587                         s390_ledbr (code, s390_f15, ins->sreg1);
4588                         S390_LONG (code, stey, ste, s390_f15, 0,
4589                                    ins->inst_destbasereg, ins->inst_offset);
4590                 }
4591                         break;
4592                 case OP_LOADR4_MEMBASE: {
4593                         S390_LONG (code, ldy, ld, s390_f15, 0,
4594                                    ins->inst_basereg, ins->inst_offset);
4595                         s390_ldebr (code, ins->dreg, s390_f15);
4596                 }
4597                         break;
4598                 case OP_ICONV_TO_R_UN: {
4599                         s390_cdfbr (code, ins->dreg, ins->sreg1);
4600                         s390_ltr   (code, ins->sreg1, ins->sreg1);
4601                         s390_jnl   (code, 12);
4602                         s390_basr  (code, s390_r13, 0);
4603                         s390_j     (code, 6);
4604                         s390_word  (code, 0x41f00000);
4605                         s390_word  (code, 0);
4606                         s390_adb   (code, ins->dreg, 0, s390_r13, 4);
4607                 }
4608                         break;
4609                 case OP_LCONV_TO_R_UN: {
4610                         s390_cdgbr (code, ins->dreg, ins->sreg1);
4611                         s390_ltgr  (code, ins->sreg1, ins->sreg1);
4612                         s390_jnl   (code, 12);
4613                         s390_basr  (code, s390_r13, 0);
4614                         s390_j     (code, 6);
4615                         s390_word  (code, 0x41f00000);
4616                         s390_word  (code, 0);
4617                         s390_adb   (code, ins->dreg, 0, s390_r13, 4);
4618                 }
4619                         break;
4620                 case OP_LCONV_TO_R4:
4621                 case OP_ICONV_TO_R4: {
4622                         s390_cdgbr (code, ins->dreg, ins->sreg1);
4623                 }
4624                         break;
4625                 case OP_LCONV_TO_R8:
4626                 case OP_ICONV_TO_R8: {
4627                         s390_cdgbr (code, ins->dreg, ins->sreg1);
4628                 }
4629                         break;
4630                 case OP_FCONV_TO_I1:
4631                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 1, TRUE);
4632                         break;
4633                 case OP_FCONV_TO_U1:
4634                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 1, FALSE);
4635                         break;
4636                 case OP_FCONV_TO_I2:
4637                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 2, TRUE);
4638                         break;
4639                 case OP_FCONV_TO_U2:
4640                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 2, FALSE);
4641                         break;
4642                 case OP_FCONV_TO_I4:
4643                 case OP_FCONV_TO_I:
4644                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 4, TRUE);
4645                         break;
4646                 case OP_FCONV_TO_U4:
4647                 case OP_FCONV_TO_U:
4648                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 4, FALSE);
4649                         break;
4650                 case OP_FCONV_TO_I8:
4651                         s390_cgdbr (code, ins->dreg, 5, ins->sreg1);
4652                         break;
4653                 case OP_LCONV_TO_OVF_I: {
4654                         /* Valid ints: 0xffffffff:8000000 to 00000000:0x7f000000 */
4655                         short int *o[5];
4656                         s390_ltgr (code, ins->sreg2, ins->sreg2);
4657                         s390_jnl  (code, 0); CODEPTR(code, o[0]);
4658                         s390_ltgr (code, ins->sreg1, ins->sreg1);
4659                         s390_jnl  (code, 0); CODEPTR(code, o[1]);
4660                         s390_lhi  (code, s390_r13, -1);
4661                         s390_cgr  (code, ins->sreg1, s390_r13);
4662                         s390_jnz  (code, 0); CODEPTR(code, o[2]);
4663                         if (ins->dreg != ins->sreg2)
4664                                 s390_lgr  (code, ins->dreg, ins->sreg2);
4665                         s390_j    (code, 0); CODEPTR(code, o[3]);
4666                         PTRSLOT(code, o[0]);
4667                         s390_jz   (code, 0); CODEPTR(code, o[4]);
4668                         PTRSLOT(code, o[1]);
4669                         PTRSLOT(code, o[2]);
4670                         mono_add_patch_info (cfg, code - cfg->native_code,
4671                                              MONO_PATCH_INFO_EXC, "OverflowException");
4672                         s390_brasl (code, s390_r14, 0);
4673                         PTRSLOT(code, o[3]);
4674                         PTRSLOT(code, o[4]);
4675                 }
4676                         break;
4677                 case OP_ABS: {
4678                         s390_lpdbr (code, ins->dreg, ins->sreg1);
4679                 }
4680                         break;
4681                 case OP_SQRT: {
4682                         s390_sqdbr (code, ins->dreg, ins->sreg1);
4683                 }
4684                         break;
4685                 case OP_FADD: {
4686                         CHECK_SRCDST_COM_F;
4687                         s390_adbr (code, ins->dreg, src2);
4688                 }
4689                         break;
4690                 case OP_FSUB: {
4691                         CHECK_SRCDST_NCOM_F;
4692                         s390_sdbr (code, ins->dreg, src2);
4693                 }
4694                         break;
4695                 case OP_FMUL: {
4696                         CHECK_SRCDST_COM_F;
4697                         s390_mdbr (code, ins->dreg, src2);
4698                 }
4699                         break;
4700                 case OP_FDIV: {
4701                         CHECK_SRCDST_NCOM_F;
4702                         s390_ddbr (code, ins->dreg, src2);
4703                 }
4704                         break;
4705                 case OP_FNEG: {
4706                         s390_lcdbr (code, ins->dreg, ins->sreg1);
4707                 }
4708                         break;
4709                 case OP_FREM: {
4710                         CHECK_SRCDST_NCOM_F;
4711                         s390_didbr (code, ins->dreg, src2, 5, s390_f15);
4712                 }
4713                         break;
4714                 case OP_FCOMPARE: {
4715                         s390_cdbr (code, ins->sreg1, ins->sreg2);
4716                 }
4717                         break;
4718                 case OP_FCEQ: {
4719                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4720                         s390_lghi  (code, ins->dreg, 1);
4721                         s390_je    (code, 4);
4722                         s390_lghi  (code, ins->dreg, 0);
4723                 }
4724                         break;
4725                 case OP_FCLT: {
4726                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4727                         s390_lghi  (code, ins->dreg, 1);
4728                         s390_jl    (code, 4);
4729                         s390_lghi  (code, ins->dreg, 0);
4730                 }
4731                         break;
4732                 case OP_FCLT_UN: {
4733                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4734                         s390_lghi  (code, ins->dreg, 1);
4735                         s390_jlo   (code, 4);
4736                         s390_lghi  (code, ins->dreg, 0);
4737                 }
4738                         break;
4739                 case OP_FCGT: {
4740                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4741                         s390_lghi  (code, ins->dreg, 1);
4742                         s390_jh    (code, 4);
4743                         s390_lghi  (code, ins->dreg, 0);
4744                 }
4745                         break;
4746                 case OP_FCGT_UN: {
4747                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4748                         s390_lghi  (code, ins->dreg, 1);
4749                         s390_jho   (code, 4);
4750                         s390_lghi  (code, ins->dreg, 0);
4751                 }
4752                         break;
4753                 case OP_FBEQ: {
4754                         short *o;
4755                         s390_jo (code, 0); CODEPTR(code, o);
4756                         EMIT_COND_BRANCH (ins, S390_CC_EQ);
4757                         PTRSLOT (code, o);
4758                 }
4759                         break;
4760                 case OP_FBNE_UN:
4761                         EMIT_COND_BRANCH (ins, S390_CC_NE|S390_CC_OV);
4762                         break;
4763                 case OP_FBLT: {
4764                         short *o;
4765                         s390_jo (code, 0); CODEPTR(code, o);
4766                         EMIT_COND_BRANCH (ins, S390_CC_LT);
4767                         PTRSLOT (code, o);
4768                 }
4769                         break;
4770                 case OP_FBLT_UN:
4771                         EMIT_COND_BRANCH (ins, S390_CC_LT|S390_CC_OV);
4772                         break;
4773                 case OP_FBGT: {
4774                         short *o;
4775                         s390_jo (code, 0); CODEPTR(code, o);
4776                         EMIT_COND_BRANCH (ins, S390_CC_GT);
4777                         PTRSLOT (code, o);
4778                 }
4779                         break;
4780                 case OP_FBGT_UN:
4781                         EMIT_COND_BRANCH (ins, S390_CC_GT|S390_CC_OV);
4782                         break;
4783                 case OP_FBGE: {
4784                         short *o;
4785                         s390_jo (code, 0); CODEPTR(code, o);
4786                         EMIT_COND_BRANCH (ins, S390_CC_GE);
4787                         PTRSLOT (code, o);
4788                 }
4789                         break;
4790                 case OP_FBGE_UN:
4791                         EMIT_COND_BRANCH (ins, S390_CC_GE|S390_CC_OV);
4792                         break;
4793                 case OP_FBLE: {
4794                         short *o;
4795                         s390_jo (code, 0); CODEPTR(code, o);
4796                         EMIT_COND_BRANCH (ins, S390_CC_LE);
4797                         PTRSLOT (code, o);
4798                 }
4799                         break;
4800                 case OP_FBLE_UN:
4801                         EMIT_COND_BRANCH (ins, S390_CC_LE|S390_CC_OV);
4802                         break;
4803                 case OP_CKFINITE: {
4804                         short *o;
4805                         s390_lhi  (code, s390_r13, 0x7f);
4806                         s390_tcdb (code, ins->sreg1, 0, s390_r13, 0);
4807                         s390_jz   (code, 0); CODEPTR(code, o);
4808                         mono_add_patch_info (cfg, code - cfg->native_code,
4809                                              MONO_PATCH_INFO_EXC, "ArithmeticException");
4810                         s390_brasl (code, s390_r14,0);
4811                         PTRSLOT(code, o);
4812                 }
4813                         break;
4814                 case OP_S390_MOVE: {
4815                         if (ins->backend.size > 0) {
4816                                 if (ins->backend.size <= 256) {
4817                                         s390_mvc  (code, ins->backend.size, ins->dreg,
4818                                                    ins->inst_offset, ins->sreg1, ins->inst_imm);
4819                                 } else {
4820                                         s390_lgr  (code, s390_r0, ins->dreg);
4821                                         if (ins->inst_offset > 0) {
4822                                                 if (s390_is_imm16 (ins->inst_offset)) {
4823                                                         s390_aghi (code, s390_r0, ins->inst_offset);
4824                                                 } else {
4825                                                         s390_basr (code, s390_r13, 0);
4826                                                         s390_j    (code, 6);
4827                                                         s390_llong(code, ins->inst_offset);
4828                                                         s390_ag   (code, s390_r0, 0, s390_r13, 4);
4829                                                 }
4830                                         }
4831                                         s390_lgr  (code, s390_r12, ins->sreg1);
4832                                         if (ins->inst_imm > 0) {
4833                                                 if (s390_is_imm16 (ins->inst_imm)) {
4834                                                         s390_aghi (code, s390_r12, ins->inst_imm);
4835                                                 } else {
4836                                                         s390_basr (code, s390_r13, 0);
4837                                                         s390_j    (code, 6);
4838                                                         s390_llong(code, ins->inst_imm);
4839                                                         s390_ag   (code, s390_r12, 0, s390_r13, 4);
4840                                                 }
4841                                         }
4842                                         if (s390_is_imm16 (ins->backend.size)) {
4843                                                 s390_lghi (code, s390_r1, ins->backend.size);
4844                                         } else {
4845                                                 s390_basr (code, s390_r13, 0);
4846                                                 s390_j    (code, 6);
4847                                                 s390_llong(code, ins->backend.size);
4848                                                 s390_lg   (code, s390_r1, 0, s390_r13, 4);
4849                                         }
4850                                         s390_lgr  (code, s390_r13, s390_r1);
4851                                         s390_mvcle(code, s390_r0, s390_r12, 0, 0);
4852                                         s390_jo   (code, -2);
4853                                 }
4854                         }
4855                 }
4856                         break;
4857                 case OP_ATOMIC_ADD_I8: {
4858                         s390_lgr (code, s390_r1, ins->sreg2);
4859                         s390_lg  (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4860                         s390_agr (code, s390_r1, s390_r0);
4861                         s390_csg (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
4862                         s390_jnz (code, -10);
4863                         s390_lgr (code, ins->dreg, s390_r1);
4864                 }
4865                         break;
4866                 case OP_ATOMIC_ADD_NEW_I8: {
4867                         s390_lgr (code, s390_r1, ins->sreg2);
4868                         s390_lg  (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4869                         s390_agr (code, s390_r1, s390_r0);
4870                         s390_csg (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
4871                         s390_jnz (code, -10);
4872                         s390_lgr (code, ins->dreg, s390_r1);
4873                 }
4874                         break;
4875                 case OP_ATOMIC_EXCHANGE_I8: {
4876                         s390_lg  (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4877                         s390_csg (code, s390_r0, ins->sreg2, ins->inst_basereg, ins->inst_offset);
4878                         s390_jnz (code, -6);
4879                         s390_lgr (code, ins->dreg, s390_r0);
4880                 }
4881                         break;
4882                 case OP_ATOMIC_ADD_I4: {
4883                         s390_lgfr(code, s390_r1, ins->sreg2);
4884                         s390_lgf (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4885                         s390_agr (code, s390_r1, s390_r0);
4886                         s390_cs  (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
4887                         s390_jnz (code, -9);
4888                         s390_lgfr(code, ins->dreg, s390_r1);
4889                 }
4890                         break;
4891                 case OP_ATOMIC_ADD_NEW_I4: {
4892                         s390_lgfr(code, s390_r1, ins->sreg2);
4893                         s390_lgf (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4894                         s390_agr (code, s390_r1, s390_r0);
4895                         s390_cs  (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
4896                         s390_jnz (code, -9);
4897                         s390_lgfr(code, ins->dreg, s390_r1);
4898                 }
4899                         break;
4900                 case OP_ATOMIC_EXCHANGE_I4: {
4901                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4902                         s390_cs  (code, s390_r0, ins->sreg2, ins->inst_basereg, ins->inst_offset);
4903                         s390_jnz (code, -4);
4904                         s390_lgfr(code, ins->dreg, s390_r0);
4905                 }
4906                         break;
4907                 case OP_S390_BKCHAIN: {
4908                         s390_lgr  (code, ins->dreg, ins->sreg1);
4909                         if (s390_is_imm16 (cfg->stack_offset)) {
4910                                 s390_aghi (code, ins->dreg, cfg->stack_offset);
4911                         } else {
4912                                 s390_basr (code, s390_r13, 0);
4913                                 s390_j    (code, 6);
4914                                 s390_llong(code, cfg->stack_offset);
4915                                 s390_ag   (code, ins->dreg, 0, s390_r13, 4);
4916                         }
4917                 }
4918                         break;
4919                 case OP_MEMORY_BARRIER: {
4920                 }
4921                         break;
4922                 case OP_GC_LIVENESS_DEF:
4923                 case OP_GC_LIVENESS_USE:
4924                 case OP_GC_PARAM_SLOT_LIVENESS_DEF:
4925                         ins->backend.pc_offset = code - cfg->native_code;
4926                         break;
4927                 case OP_GC_SPILL_SLOT_LIVENESS_DEF:
4928                         ins->backend.pc_offset = code - cfg->native_code;
4929                         bb->spill_slot_defs = g_slist_prepend_mempool (cfg->mempool, bb->spill_slot_defs, ins);
4930                         break;
4931                 default:
4932                         g_warning ("unknown opcode %s in %s()\n", mono_inst_name (ins->opcode), __FUNCTION__);
4933                         g_assert_not_reached ();
4934                 }
4935
4936                 if ((cfg->opt & MONO_OPT_BRANCH) && ((code - cfg->native_code - offset) > max_len)) {
4937                         g_warning ("wrong maximal instruction length of instruction %s (expected %d, got %ld)",
4938                                    mono_inst_name (ins->opcode), max_len, code - cfg->native_code - offset);
4939                         g_assert_not_reached ();
4940                 }
4941
4942                 cpos += max_len;
4943
4944                 last_offset = offset;
4945         }
4946
4947         cfg->code_len = code - cfg->native_code;
4948 }
4949
4950 /*========================= End of Function ========================*/
4951
4952 /*------------------------------------------------------------------*/
4953 /*                                                                  */
4954 /* Name         - mono_arch_register_lowlevel_calls                 */
4955 /*                                                                  */
4956 /* Function     - Register routines to help with --trace operation. */
4957 /*                                                                  */
4958 /*------------------------------------------------------------------*/
4959
4960 void
4961 mono_arch_register_lowlevel_calls (void)
4962 {
4963 }
4964
4965 /*========================= End of Function ========================*/
4966
4967 /*------------------------------------------------------------------*/
4968 /*                                                                  */
4969 /* Name         - mono_arch_patch_code                              */
4970 /*                                                                  */
4971 /* Function     - Process the patch data created during the         */
4972 /*                instruction build process. This resolves jumps,   */
4973 /*                calls, variables etc.                             */
4974 /*                                                                  */
4975 /*------------------------------------------------------------------*/
4976
4977 void
4978 mono_arch_patch_code (MonoMethod *method, MonoDomain *domain,
4979                       guint8 *code, MonoJumpInfo *ji, MonoCodeManager *dyn_code_mp, gboolean run_cctors)
4980 {
4981         MonoJumpInfo *patch_info;
4982
4983         for (patch_info = ji; patch_info; patch_info = patch_info->next) {
4984                 unsigned char *ip = patch_info->ip.i + code;
4985                 gconstpointer target = NULL;
4986
4987                 target = mono_resolve_patch_target (method, domain, code,
4988                                                     patch_info, run_cctors);
4989
4990                 switch (patch_info->type) {
4991                         case MONO_PATCH_INFO_IP:
4992                         case MONO_PATCH_INFO_EXC_NAME:
4993                         case MONO_PATCH_INFO_LDSTR:
4994                         case MONO_PATCH_INFO_TYPE_FROM_HANDLE:
4995                         case MONO_PATCH_INFO_LDTOKEN:
4996                         case MONO_PATCH_INFO_EXC:
4997                         case MONO_PATCH_INFO_ABS:
4998                         case MONO_PATCH_INFO_METHOD:
4999                         case MONO_PATCH_INFO_RGCTX_FETCH:
5000                         case MONO_PATCH_INFO_INTERNAL_METHOD:
5001                         case MONO_PATCH_INFO_CLASS_INIT:
5002                         case MONO_PATCH_INFO_JIT_ICALL_ADDR:
5003                         case MONO_PATCH_INFO_GENERIC_CLASS_INIT:
5004                                 s390_patch_addr (ip, (guint64) target);
5005                                 continue;
5006                         case MONO_PATCH_INFO_SWITCH:
5007                                 /*----------------------------------*/
5008                                 /* ip points at the basr r13,0/j +4 */
5009                                 /* instruction the vtable value     */
5010                                 /* follows this (i.e. ip+6)         */
5011                                 /*----------------------------------*/
5012                                 *((gconstpointer *)(ip+6)) = target;
5013                                 continue;
5014                         case MONO_PATCH_INFO_METHODCONST:
5015                         case MONO_PATCH_INFO_CLASS:
5016                         case MONO_PATCH_INFO_IMAGE:
5017                         case MONO_PATCH_INFO_FIELD:
5018                         case MONO_PATCH_INFO_IID:
5019                                 target = S390_RELATIVE(target, ip);
5020                                 s390_patch_rel (ip, (guint64) target);
5021                                 continue;
5022                         case MONO_PATCH_INFO_R4:
5023                         case MONO_PATCH_INFO_R8:
5024                         case MONO_PATCH_INFO_METHOD_REL:
5025                                 g_assert_not_reached ();
5026                                 continue;
5027                         default:
5028                                 target = S390_RELATIVE(target, ip);
5029                                 ip += 2;
5030                                 s390_patch_rel (ip, (guint64) target);
5031                 }
5032         }
5033 }
5034
5035 /*========================= End of Function ========================*/
5036
5037 /*------------------------------------------------------------------*/
5038 /*                                                                  */
5039 /* Name         - emit_load_volatile_arguments                      */
5040 /*                                                                  */
5041 /* Function     - Emit the instructions to reload parameter regist- */
5042 /*                registers for use with "tail" operations.         */
5043 /*                                                                  */
5044 /*                The register loading operations performed here    */
5045 /*                are the mirror of the store operations performed  */
5046 /*                in mono_arch_emit_prolog and need to be kept in   */
5047 /*                synchronization with it.                          */
5048 /*                                                                  */
5049 /*------------------------------------------------------------------*/
5050
5051 guint8 *
5052 emit_load_volatile_arguments (guint8 *code, MonoCompile *cfg)
5053 {
5054         MonoInst *inst;
5055         MonoMethod *method = cfg->method;
5056         MonoMethodSignature *sig = mono_method_signature(method);
5057         int pos = 0, i;
5058         CallInfo *cinfo;
5059
5060         cinfo = get_call_info (NULL, NULL, sig);
5061
5062         if (cinfo->struct_ret) {
5063                 ArgInfo *ainfo = &cinfo->ret;
5064                 inst         = cfg->vret_addr;
5065                 s390_lg (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
5066         }
5067
5068         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
5069                 ArgInfo *ainfo = cinfo->args + i;
5070                 inst = cfg->args [pos];
5071
5072                 if (inst->opcode == OP_REGVAR) {
5073                         if (ainfo->regtype == RegTypeGeneral)
5074                                 s390_lgr (code, ainfo->reg, inst->dreg);
5075                         else if (ainfo->regtype == RegTypeFP) {
5076                                 if (inst->dreg != ainfo->reg) {
5077                                         if (ainfo->size == 4) {
5078                                                 s390_ldebr (code, ainfo->reg, inst->dreg);
5079                                         } else {
5080                                                 s390_ldr   (code, ainfo->reg, inst->dreg);
5081                                         }
5082                                 }
5083                         }
5084                         else if (ainfo->regtype == RegTypeBase) {
5085                         } else
5086                                 g_assert_not_reached ();
5087                 } else {
5088                         if (ainfo->regtype == RegTypeGeneral) {
5089                                 if (!((ainfo->reg >= 2) && (ainfo->reg <= 6)))
5090                                         g_assert_not_reached();
5091                                 switch (ainfo->size) {
5092                                 case 1:
5093                                         s390_llgc (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
5094                                         break;
5095                                 case 2:
5096                                         s390_lgh  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
5097                                         break;
5098                                 case 4:
5099                                         s390_lgf (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
5100                                         break;
5101                                 case 8:
5102                                         s390_lg  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
5103                                         break;
5104                                 }
5105                         } else if (ainfo->regtype == RegTypeBase) {
5106                         } else if (ainfo->regtype == RegTypeFP) {
5107                                 if (ainfo->size == 8)
5108                                         s390_ld  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
5109                                 else if (ainfo->size == 4)
5110                                         s390_le  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
5111                                 else
5112                                         g_assert_not_reached ();
5113                         } else if (ainfo->regtype == RegTypeStructByVal) {
5114                                 if (ainfo->reg != STK_BASE) {
5115                                         switch (ainfo->size) {
5116                                         case 1:
5117                                                 s390_llgc (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
5118                                                 break;
5119                                         case 2:
5120                                                 s390_lgh (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
5121                                                 break;
5122                                         case 4:
5123                                                 s390_lgf (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
5124                                                 break;
5125                                         case 8:
5126                                                 s390_lg  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
5127                                                 break;
5128                                         }
5129                                 }
5130                         } else if (ainfo->regtype == RegTypeStructByAddr) {
5131                                 if (ainfo->reg != STK_BASE) {
5132                                         s390_lg (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
5133                                 }
5134                         } else
5135                                 g_assert_not_reached ();
5136                 }
5137                 pos++;
5138         }
5139
5140         return code;
5141 }
5142
5143 /*========================= End of Function ========================*/
5144
5145 /*------------------------------------------------------------------*/
5146 /*                                                                  */
5147 /* Name         - mono_arch_emit_prolog                             */
5148 /*                                                                  */
5149 /* Function     - Create the instruction sequence for a function    */
5150 /*                prolog.                                           */
5151 /*                                                                  */
5152 /*------------------------------------------------------------------*/
5153
5154 guint8 *
5155 mono_arch_emit_prolog (MonoCompile *cfg)
5156 {
5157         MonoMethod *method = cfg->method;
5158         MonoBasicBlock *bb;
5159         MonoMethodSignature *sig;
5160         MonoInst *inst;
5161         long alloc_size, pos, max_offset, i, cfa_offset = 0;
5162         guint8 *code;
5163         guint32 size;
5164         CallInfo *cinfo;
5165         int tracing = 0;
5166         int lmfOffset;
5167
5168         cfg->code_size   = 512;
5169
5170         if (mono_jit_trace_calls != NULL && mono_trace_eval (method)) {
5171                 tracing         = 1;
5172                 cfg->code_size += 256;
5173         } else if (cfg->prof_options & MONO_PROFILE_ENTER_LEAVE)
5174                 cfg->code_size += 256;
5175
5176         if (method->save_lmf)
5177                 cfg->code_size += 200;
5178
5179         cfg->native_code = code = g_malloc (cfg->code_size);
5180
5181         mono_emit_unwind_op_def_cfa (cfg, code, STK_BASE, 0);
5182         emit_unwind_regs(cfg, code, s390_r6, s390_r14, S390_REG_SAVE_OFFSET);
5183         s390_stmg (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
5184         mono_emit_unwind_op_offset (cfg, code, s390_r14, S390_RET_ADDR_OFFSET);
5185
5186         if (cfg->arch.bkchain_reg != -1)
5187                 s390_lgr (code, cfg->arch.bkchain_reg, STK_BASE);
5188
5189         if (cfg->flags & MONO_CFG_HAS_ALLOCA) {
5190                 cfg->used_int_regs |= 1 << 11;
5191         }
5192
5193         alloc_size = cfg->stack_offset;
5194
5195         cfg->stack_usage = cfa_offset = alloc_size;
5196         mono_emit_unwind_op_def_cfa_offset (cfg, code, alloc_size);
5197         s390_lgr  (code, s390_r11, STK_BASE);
5198         if (s390_is_imm16 (alloc_size)) {
5199                 s390_aghi (code, STK_BASE, -alloc_size);
5200         } else {
5201                 int stackSize = alloc_size;
5202                 while (stackSize > 32767) {
5203                         s390_aghi (code, STK_BASE, -32767);
5204                         stackSize -= 32767;
5205                 }
5206                 s390_aghi (code, STK_BASE, -stackSize);
5207         }
5208         s390_stg  (code, s390_r11, 0, STK_BASE, 0);
5209
5210         if (cfg->frame_reg != STK_BASE)
5211                 s390_lgr (code, s390_r11, STK_BASE);
5212
5213         mono_emit_unwind_op_def_cfa_reg (cfg, code, cfg->frame_reg);
5214
5215         /* store runtime generic context */
5216         if (cfg->rgctx_var) {
5217                 g_assert (cfg->rgctx_var->opcode == OP_REGOFFSET);
5218
5219                 s390_stg  (code, MONO_ARCH_RGCTX_REG, 0,
5220                            cfg->rgctx_var->inst_basereg,
5221                            cfg->rgctx_var->inst_offset);
5222         }
5223
5224         /* compute max_offset in order to use short forward jumps
5225          * we always do it on s390 because the immediate displacement
5226          * for jumps is too small
5227          */
5228         max_offset = 0;
5229         for (bb = cfg->bb_entry; bb; bb = bb->next_bb) {
5230                 MonoInst *ins;
5231                 bb->max_offset = max_offset;
5232
5233                 if (cfg->prof_options & MONO_PROFILE_COVERAGE)
5234                         max_offset += 6;
5235
5236                 MONO_BB_FOR_EACH_INS (bb, ins)
5237                         max_offset += ((guint8 *)ins_get_spec (ins->opcode))[MONO_INST_LEN];
5238         }
5239
5240         /* load arguments allocated to register from the stack */
5241         sig = mono_method_signature (method);
5242         pos = 0;
5243
5244         cinfo = get_call_info (cfg, cfg->mempool, sig);
5245
5246         if (cinfo->struct_ret) {
5247                 ArgInfo *ainfo     = &cinfo->ret;
5248                 inst               = cfg->vret_addr;
5249                 inst->backend.size = ainfo->vtsize;
5250                 s390_stg (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
5251         }
5252
5253         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
5254                 ArgInfo *ainfo = cinfo->args + i;
5255                 inst = cfg->args [pos];
5256
5257                 if (inst->opcode == OP_VTARG_ADDR)
5258                         inst = inst->inst_left;
5259
5260                 if (inst->opcode == OP_REGVAR) {
5261                         if (ainfo->regtype == RegTypeGeneral)
5262                                 s390_lgr (code, inst->dreg, ainfo->reg);
5263                         else if (ainfo->regtype == RegTypeFP) {
5264                                 if (inst->dreg != ainfo->reg) {
5265                                         if (ainfo->size == 4) {
5266                                                 s390_ledbr (code, inst->dreg, ainfo->reg);
5267                                         } else {
5268                                                 s390_ldr   (code, inst->dreg, ainfo->reg);
5269                                         }
5270                                 }
5271                         }
5272                         else if (ainfo->regtype == RegTypeBase) {
5273                                 s390_lgr  (code, s390_r13, STK_BASE);
5274                                 s390_aghi (code, s390_r13, alloc_size);
5275                                 s390_lg   (code, inst->dreg, 0, s390_r13, ainfo->offset);
5276                         } else
5277                                 g_assert_not_reached ();
5278
5279                         if (cfg->verbose_level > 2)
5280                                 g_print ("Argument %d assigned to register %s\n",
5281                                          pos, mono_arch_regname (inst->dreg));
5282                 } else {
5283                         if (ainfo->regtype == RegTypeGeneral) {
5284                                 if (!((ainfo->reg >= 2) && (ainfo->reg <= 6)))
5285                                         g_assert_not_reached();
5286                                 switch (ainfo->size) {
5287                                 case 1:
5288                                         s390_stc (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
5289                                         break;
5290                                 case 2:
5291                                         s390_sth (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
5292                                         break;
5293                                 case 4:
5294                                         s390_st (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
5295                                         break;
5296                                 case 8:
5297                                         s390_stg (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
5298                                         break;
5299                                 }
5300                         } else if (ainfo->regtype == RegTypeBase) {
5301                         } else if (ainfo->regtype == RegTypeFP) {
5302                                 if (ainfo->size == 8)
5303                                         s390_std (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
5304                                 else if (ainfo->size == 4)
5305                                         s390_ste (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
5306                                 else
5307                                         g_assert_not_reached ();
5308                         } else if (ainfo->regtype == RegTypeStructByVal) {
5309                                 int doffset = inst->inst_offset;
5310                                 int reg;
5311                                 if (ainfo->reg != STK_BASE)
5312                                         reg = ainfo->reg;
5313                                 else {
5314                                         reg = s390_r0;
5315                                         s390_lgr  (code, s390_r13, STK_BASE);
5316                                         s390_aghi (code, s390_r13, alloc_size);
5317                                 }
5318
5319                                 size = (method->wrapper_type == MONO_WRAPPER_MANAGED_TO_NATIVE
5320                                         ? mono_class_native_size(mono_class_from_mono_type(inst->inst_vtype), NULL)
5321                                         : ainfo->size);
5322
5323                                 switch (size) {
5324                                         case 1:
5325                                                 if (ainfo->reg == STK_BASE)
5326                                                         s390_ic (code, reg, 0, s390_r13, ainfo->offset+7);
5327                                                 s390_stc (code, reg, 0, inst->inst_basereg, doffset);
5328                                                 break;
5329                                         case 2:
5330                                                 if (ainfo->reg == STK_BASE)
5331                                                         s390_lh (code, reg, 0, s390_r13, ainfo->offset+6);
5332                                                 s390_sth (code, reg, 0, inst->inst_basereg, doffset);
5333                                                 break;
5334                                         case 4:
5335                                                 if (ainfo->reg == STK_BASE)
5336                                                         s390_l  (code, reg, 0, s390_r13, ainfo->offset+4);
5337                                                 s390_st (code, reg, 0, inst->inst_basereg, doffset);
5338                                                 break;
5339                                         case 8:
5340                                                 if (ainfo->reg == STK_BASE)
5341                                                         s390_lg  (code, reg, 0, s390_r13, ainfo->offset);
5342                                                 s390_stg (code, reg, 0, inst->inst_basereg, doffset);
5343                                                 break;
5344                                 }
5345                         } else if (ainfo->regtype == RegTypeStructByAddr) {
5346                                 s390_stg (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
5347                         } else if (ainfo->regtype == RegTypeStructByAddrOnStack) {
5348                         } else
5349                                 g_assert_not_reached ();
5350                 }
5351                 pos++;
5352         }
5353
5354         if (method->save_lmf) {
5355                 /*---------------------------------------------------------------*/
5356                 /* build the MonoLMF structure on the stack - see mini-s390x.h   */
5357                 /*---------------------------------------------------------------*/
5358                 lmfOffset = alloc_size - sizeof(MonoLMF);
5359
5360                 s390_lgr   (code, s390_r13, cfg->frame_reg);
5361                 s390_aghi  (code, s390_r13, lmfOffset);
5362
5363                 /*---------------------------------------------------------------*/
5364                 /* Preserve the parameter registers while we fix up the lmf      */
5365                 /*---------------------------------------------------------------*/
5366                 s390_stmg  (code, s390_r2, s390_r6, s390_r13,
5367                             G_STRUCT_OFFSET(MonoLMF, pregs[0]));
5368
5369                 /*---------------------------------------------------------------*/
5370                 /* On return from this call r2 have the address of the &lmf      */
5371                 /*---------------------------------------------------------------*/
5372                 if (lmf_addr_tls_offset == -1) {
5373                         s390_basr(code, s390_r14, 0);
5374                         s390_j   (code, 6);
5375                         mono_add_patch_info (cfg, code - cfg->native_code,
5376                                              MONO_PATCH_INFO_INTERNAL_METHOD,
5377                                              (gpointer)"mono_get_lmf_addr");
5378                         s390_llong(code, 0);
5379                         s390_lg   (code, s390_r1, 0, s390_r14, 4);
5380                         s390_basr (code, s390_r14, s390_r1);
5381                 } else {
5382                         /*-------------------------------------------------------*/
5383                         /* Get LMF by getting value from thread level storage    */
5384                         /*-------------------------------------------------------*/
5385                         s390_ear (code, s390_r1, 0);
5386                         s390_sllg(code, s390_r1, s390_r1, 0, 32);
5387                         s390_ear (code, s390_r1, 1);
5388                         s390_lg  (code, s390_r2, 0, s390_r1, lmf_addr_tls_offset);
5389                 }
5390
5391                 /*---------------------------------------------------------------*/
5392                 /* Set lmf.lmf_addr = jit_tls->lmf                               */
5393                 /*---------------------------------------------------------------*/
5394                 s390_stg   (code, s390_r2, 0, s390_r13,
5395                             G_STRUCT_OFFSET(MonoLMF, lmf_addr));
5396
5397                 /*---------------------------------------------------------------*/
5398                 /* Get current lmf                                               */
5399                 /*---------------------------------------------------------------*/
5400                 s390_lg    (code, s390_r0, 0, s390_r2, 0);
5401
5402                 /*---------------------------------------------------------------*/
5403                 /* Set our lmf as the current lmf                                */
5404                 /*---------------------------------------------------------------*/
5405                 s390_stg   (code, s390_r13, 0, s390_r2, 0);
5406
5407                 /*---------------------------------------------------------------*/
5408                 /* Have our lmf.previous_lmf point to the last lmf               */
5409                 /*---------------------------------------------------------------*/
5410                 s390_stg   (code, s390_r0, 0, s390_r13,
5411                             G_STRUCT_OFFSET(MonoLMF, previous_lmf));
5412
5413                 /*---------------------------------------------------------------*/
5414                 /* save method info                                              */
5415                 /*---------------------------------------------------------------*/
5416                 s390_basr  (code, s390_r1, 0);
5417                 s390_j     (code, 6);
5418                 s390_llong (code, method);
5419                 s390_lg    (code, s390_r1, 0, s390_r1, 4);
5420                 s390_stg   (code, s390_r1, 0, s390_r13,
5421                             G_STRUCT_OFFSET(MonoLMF, method));
5422
5423                 /*---------------------------------------------------------------*/
5424                 /* save the current IP                                           */
5425                 /*---------------------------------------------------------------*/
5426                 s390_stg   (code, STK_BASE, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, ebp));
5427                 s390_basr  (code, s390_r1, 0);
5428                 s390_stg   (code, s390_r1, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, eip));
5429
5430                 /*---------------------------------------------------------------*/
5431                 /* Save general and floating point registers                     */
5432                 /*---------------------------------------------------------------*/
5433                 s390_stmg  (code, s390_r2, s390_r12, s390_r13,
5434                             G_STRUCT_OFFSET(MonoLMF, gregs[2]));
5435                 for (i = 0; i < 16; i++) {
5436                         s390_std  (code, i, 0, s390_r13,
5437                                    G_STRUCT_OFFSET(MonoLMF, fregs[i]));
5438                 }
5439
5440                 /*---------------------------------------------------------------*/
5441                 /* Restore the parameter registers now that we've set up the lmf */
5442                 /*---------------------------------------------------------------*/
5443                 s390_lmg   (code, s390_r2, s390_r6, s390_r13,
5444                             G_STRUCT_OFFSET(MonoLMF, pregs[0]));
5445         }
5446
5447         if (tracing)
5448                 code = mono_arch_instrument_prolog(cfg, enter_method, code, TRUE);
5449
5450         cfg->code_len = code - cfg->native_code;
5451         g_assert (cfg->code_len < cfg->code_size);
5452
5453         return code;
5454 }
5455
5456 /*========================= End of Function ========================*/
5457
5458 /*------------------------------------------------------------------*/
5459 /*                                                                  */
5460 /* Name         - mono_arch_emit_epilog                             */
5461 /*                                                                  */
5462 /* Function     - Emit the instructions for a function epilog.      */
5463 /*                                                                  */
5464 /*------------------------------------------------------------------*/
5465
5466 void
5467 mono_arch_emit_epilog (MonoCompile *cfg)
5468 {
5469         MonoMethod *method = cfg->method;
5470         int tracing = 0;
5471         guint8 *code;
5472         int max_epilog_size = 96;
5473
5474         if (cfg->method->save_lmf)
5475                 max_epilog_size += 128;
5476
5477         if (mono_jit_trace_calls != NULL)
5478                 max_epilog_size += 128;
5479         else if (cfg->prof_options & MONO_PROFILE_ENTER_LEAVE)
5480                 max_epilog_size += 128;
5481
5482         while ((cfg->code_len + max_epilog_size) > (cfg->code_size - 16)) {
5483                 cfg->code_size  *= 2;
5484                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
5485                 cfg->stat_code_reallocs++;
5486         }
5487
5488         code = cfg->native_code + cfg->code_len;
5489
5490         if (mono_jit_trace_calls != NULL && mono_trace_eval (method)) {
5491                 code = mono_arch_instrument_epilog (cfg, leave_method, code, TRUE);
5492                 tracing = 1;
5493         }
5494
5495         if (method->save_lmf)
5496                 restoreLMF(code, cfg->frame_reg, cfg->stack_usage);
5497
5498         if (cfg->flags & MONO_CFG_HAS_ALLOCA) {
5499                 s390_lg  (code, STK_BASE, 0, STK_BASE, 0);
5500         } else
5501                 code = backUpStackPtr(cfg, code);
5502
5503         s390_lmg (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
5504         s390_br  (code, s390_r14);
5505
5506         cfg->code_len = code - cfg->native_code;
5507
5508         g_assert (cfg->code_len < cfg->code_size);
5509
5510 }
5511
5512 /*========================= End of Function ========================*/
5513
5514 /*------------------------------------------------------------------*/
5515 /*                                                                  */
5516 /* Name         - mono_arch_emit_exceptions                         */
5517 /*                                                                  */
5518 /* Function     - Emit the blocks to handle exception conditions.   */
5519 /*                                                                  */
5520 /*------------------------------------------------------------------*/
5521
5522 void
5523 mono_arch_emit_exceptions (MonoCompile *cfg)
5524 {
5525         MonoJumpInfo    *patch_info;
5526         guint8          *code;
5527         int             nThrows = 0,
5528                         exc_count = 0,
5529                         iExc;
5530         guint32         code_size;
5531         MonoClass       *exc_classes [MAX_EXC];
5532         guint8          *exc_throw_start [MAX_EXC];
5533
5534         for (patch_info = cfg->patch_info;
5535              patch_info;
5536              patch_info = patch_info->next) {
5537                 if (patch_info->type == MONO_PATCH_INFO_EXC)
5538                         exc_count++;
5539         }
5540
5541         code_size = exc_count * 48;
5542
5543         while ((cfg->code_len + code_size) > (cfg->code_size - 16)) {
5544                 cfg->code_size  *= 2;
5545                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
5546                 cfg->stat_code_reallocs++;
5547         }
5548
5549         code = cfg->native_code + cfg->code_len;
5550
5551         /*---------------------------------------------------------------------*/
5552         /* Add code to raise exceptions                                        */
5553         /*---------------------------------------------------------------------*/
5554         for (patch_info = cfg->patch_info; patch_info; patch_info = patch_info->next) {
5555                 switch (patch_info->type) {
5556                 case MONO_PATCH_INFO_EXC: {
5557                         guint8 *ip = patch_info->ip.i + cfg->native_code;
5558                         MonoClass *exc_class;
5559                         guint64 throw_ip;
5560
5561                         /*-----------------------------------------------------*/
5562                         /* Patch the branch in epilog to come here             */
5563                         /*-----------------------------------------------------*/
5564                         s390_patch_rel (ip + 2, (guint64) S390_RELATIVE(code,ip));
5565
5566                         exc_class = mono_class_from_name (mono_defaults.corlib,
5567                                                           "System",
5568                                                           patch_info->data.name);
5569                         g_assert (exc_class);
5570                         throw_ip = patch_info->ip.i;
5571
5572                         for (iExc = 0; iExc < nThrows; ++iExc)
5573                                 if (exc_classes [iExc] == exc_class)
5574                                         break;
5575
5576                         if (iExc < nThrows) {
5577                                 s390_jcl (code, S390_CC_UN,
5578                                           (guint64) exc_throw_start [iExc]);
5579                                 patch_info->type = MONO_PATCH_INFO_NONE;
5580                         } else {
5581
5582                                 if (nThrows < MAX_EXC) {
5583                                         exc_classes [nThrows]     = exc_class;
5584                                         exc_throw_start [nThrows] = code;
5585                                 }
5586
5587                                 /*---------------------------------------------*/
5588                                 /* Patch the parameter passed to the handler   */
5589                                 /*---------------------------------------------*/
5590                                 s390_basr (code, s390_r13, 0);
5591                                 s390_j    (code, 6);
5592 //                              s390_llong(code, patch_info->data.target);
5593                                 s390_llong(code, exc_class->type_token);
5594                                 /*---------------------------------------------*/
5595                                 /* Load return address & parameter register    */
5596                                 /*---------------------------------------------*/
5597                                 s390_larl (code, s390_r14, (guint64)S390_RELATIVE((patch_info->ip.i +
5598                                                            cfg->native_code + 8), code));
5599                                 s390_lg   (code, s390_r2, 0, s390_r13, 4);
5600                                 /*---------------------------------------------*/
5601                                 /* Reuse the current patch to set the jump     */
5602                                 /*---------------------------------------------*/
5603                                 s390_basr (code, s390_r13, 0);
5604                                 s390_j    (code, 6);
5605                                 patch_info->type      = MONO_PATCH_INFO_INTERNAL_METHOD;
5606                                 patch_info->data.name = "mono_arch_throw_corlib_exception";
5607                                 patch_info->ip.i      = code - cfg->native_code;
5608                                 s390_llong(code, 0);
5609                                 s390_lg   (code, s390_r1, 0, s390_r13, 4);
5610                                 s390_br   (code, s390_r1);
5611                         }
5612                         break;
5613                 }
5614                 default:
5615                         /* do nothing */
5616                         break;
5617                 }
5618         }
5619
5620         cfg->code_len = code - cfg->native_code;
5621
5622         g_assert (cfg->code_len < cfg->code_size);
5623
5624 }
5625
5626 /*========================= End of Function ========================*/
5627
5628 /*------------------------------------------------------------------*/
5629 /*                                                                  */
5630 /* Name         - mono_arch_finish_init                                 */
5631 /*                                                                  */
5632 /* Function     - Setup the JIT's Thread Level Specific Data.       */
5633 /*                                                                  */
5634 /*------------------------------------------------------------------*/
5635
5636 void
5637 mono_arch_finish_init (void)
5638 {
5639         appdomain_tls_offset = mono_domain_get_tls_offset();
5640         lmf_tls_offset = mono_get_lmf_tls_offset();
5641         lmf_addr_tls_offset = mono_get_lmf_addr_tls_offset();
5642 }
5643
5644 /*========================= End of Function ========================*/
5645
5646 /*------------------------------------------------------------------*/
5647 /*                                                                  */
5648 /* Name         - mono_arch_free_jit_tls_data                       */
5649 /*                                                                  */
5650 /* Function     - Free tls data.                                    */
5651 /*                                                                  */
5652 /*------------------------------------------------------------------*/
5653
5654 void
5655 mono_arch_free_jit_tls_data (MonoJitTlsData *tls)
5656 {
5657 }
5658
5659 /*========================= End of Function ========================*/
5660
5661 /*------------------------------------------------------------------*/
5662 /*                                                                  */
5663 /* Name         - mono_arch_emit_inst_for_method                        */
5664 /*                                                                  */
5665 /*------------------------------------------------------------------*/
5666
5667 MonoInst*
5668 mono_arch_emit_inst_for_method (MonoCompile *cfg, MonoMethod *cmethod, MonoMethodSignature *fsig, MonoInst **args)
5669 {
5670         return NULL;
5671 }
5672
5673 /*========================= End of Function ========================*/
5674
5675 /*------------------------------------------------------------------*/
5676 /*                                                                  */
5677 /* Name         - mono_arch_decompose_opts                          */
5678 /*                                                                  */
5679 /* Function     - Decompose opcode into a System z opcode.          */
5680 /*                                                                  */
5681 /*------------------------------------------------------------------*/
5682
5683 void
5684 mono_arch_decompose_opts (MonoCompile *cfg, MonoInst *ins)
5685 {
5686         /*
5687          * Have to rename these to avoid being decomposed normally, since the normal
5688          * decomposition does not work on S390.
5689          */
5690         switch (ins->opcode) {
5691         case OP_ISUB_OVF:
5692                 ins->opcode = OP_S390_ISUB_OVF;
5693                 break;
5694         case OP_ISUB_OVF_UN:
5695                 ins->opcode = OP_S390_ISUB_OVF_UN;
5696                 break;
5697         case OP_IADD_OVF:
5698                 ins->opcode = OP_S390_IADD_OVF;
5699                 break;
5700         case OP_IADD_OVF_UN:
5701                 ins->opcode = OP_S390_IADD_OVF_UN;
5702                 break;
5703         case OP_LADD_OVF:
5704                 ins->opcode = OP_S390_LADD_OVF;
5705                 break;
5706         case OP_LADD_OVF_UN:
5707                 ins->opcode = OP_S390_LADD_OVF_UN;
5708                 break;
5709         case OP_LSUB_OVF:
5710                 ins->opcode = OP_S390_LSUB_OVF;
5711                 break;
5712         case OP_LSUB_OVF_UN:
5713                 ins->opcode = OP_S390_LSUB_OVF_UN;
5714                 break;
5715         default:
5716                 break;
5717         }
5718 }
5719
5720 /*========================= End of Function ========================*/
5721
5722 /*------------------------------------------------------------------*/
5723 /*                                                                  */
5724 /* Name         - mono_arch_print_tree                              */
5725 /*                                                                  */
5726 /* Function     - Print platform-specific opcode details.           */
5727 /*                                                                  */
5728 /* Returns      - 1 - opcode details have been printed              */
5729 /*                0 - opcode details have not been printed          */
5730 /*                                                                  */
5731 /*------------------------------------------------------------------*/
5732
5733 gboolean
5734 mono_arch_print_tree (MonoInst *tree, int arity)
5735 {
5736         gboolean done;
5737
5738         switch (tree->opcode) {
5739                 case OP_S390_LOADARG:
5740                 case OP_S390_ARGREG:
5741                 case OP_S390_ARGPTR:
5742                         printf ("[0x%lx(%s)]", tree->inst_offset,
5743                                 mono_arch_regname (tree->inst_basereg));
5744                         done = 1;
5745                         break;
5746                 case OP_S390_STKARG:
5747                         printf ("[0x%lx(previous_frame)]",
5748                                 tree->inst_offset);
5749                         done = 1;
5750                         break;
5751                 case OP_S390_MOVE:
5752                         printf ("[0x%lx(%d,%s),0x%lx(%s)]",
5753                                 tree->inst_offset, tree->backend.size,
5754                                 mono_arch_regname(tree->dreg),
5755                                 tree->inst_imm,
5756                                 mono_arch_regname(tree->sreg1));
5757                         done = 1;
5758                         break;
5759                 case OP_S390_SETF4RET:
5760                         printf ("[f%s,f%s]",
5761                                 mono_arch_regname (tree->dreg),
5762                                 mono_arch_regname (tree->sreg1));
5763                         done = 1;
5764                         break;
5765                 case OP_TLS_GET:
5766                         printf ("[0x%lx(0x%lx,%s)]", tree->inst_offset,
5767                                 tree->inst_imm,
5768                                 mono_arch_regname (tree->sreg1));
5769                         done = 1;
5770                         break;
5771                 case OP_S390_BKCHAIN:
5772                         printf ("[previous_frame(%s)]",
5773                                 mono_arch_regname (tree->sreg1));
5774                         done = 1;
5775                 default:
5776                         done = 0;
5777         }
5778         return (done);
5779 }
5780
5781 /*========================= End of Function ========================*/
5782
5783 /*------------------------------------------------------------------*/
5784 /*                                                                  */
5785 /* Name         - mono_arch_regalloc_cost                           */
5786 /*                                                                  */
5787 /* Function     - Determine the cost, in the number of memory       */
5788 /*                references, of the action of allocating the var-  */
5789 /*                iable VMV into a register during global register  */
5790 /*                allocation.                                       */
5791 /*                                                                  */
5792 /* Returns      - Cost                                              */
5793 /*                                                                  */
5794 /*------------------------------------------------------------------*/
5795
5796 guint32
5797 mono_arch_regalloc_cost (MonoCompile *cfg, MonoMethodVar *vmv)
5798 {
5799         /* FIXME: */
5800         return 2;
5801 }
5802
5803 /*========================= End of Function ========================*/
5804
5805 /*------------------------------------------------------------------*/
5806 /*                                                                  */
5807 /* Name         - mono_arch_get_domain_intrinsic                    */
5808 /*                                                                  */
5809 /* Function     -                                                   */
5810 /*                                                                  */
5811 /* Returns      -                                                   */
5812 /*                                                                  */
5813 /*------------------------------------------------------------------*/
5814
5815 MonoInst *
5816 mono_arch_get_domain_intrinsic (MonoCompile* cfg)
5817 {
5818         MonoInst *ins;
5819
5820         if (appdomain_tls_offset == -1)
5821                 return NULL;
5822
5823         MONO_INST_NEW (cfg, ins, OP_TLS_GET);
5824         ins->inst_offset = appdomain_tls_offset;
5825         return (ins);
5826 }
5827
5828 /*========================= End of Function ========================*/
5829
5830 /*------------------------------------------------------------------*/
5831 /*                                                                  */
5832 /* Name         - mono_arch_flush_register_windows                  */
5833 /*                                                                  */
5834 /* Function     -                                                   */
5835 /*                                                                  */
5836 /* Returns      -                                                   */
5837 /*                                                                  */
5838 /*------------------------------------------------------------------*/
5839
5840 void
5841 mono_arch_flush_register_windows (void)
5842 {
5843 }
5844
5845 /*========================= End of Function ========================*/
5846
5847 /*------------------------------------------------------------------*/
5848 /*                                                                  */
5849 /* Name         - mono_arch_is_inst_imm                             */
5850 /*                                                                  */
5851 /* Function     - Determine if operand qualifies as an immediate    */
5852 /*                value. For s390 this is a value -32768-32768      */
5853 /*                                                                  */
5854 /* Returns      - True|False - is [not] immediate value.            */
5855 /*                                                                  */
5856 /*------------------------------------------------------------------*/
5857
5858 gboolean
5859 mono_arch_is_inst_imm (gint64 imm)
5860 {
5861         return s390_is_imm16 (imm);
5862 }
5863
5864 /*========================= End of Function ========================*/
5865
5866 /*------------------------------------------------------------------*/
5867 /*                                                                  */
5868 /* Name         - mono_arch_get_patch_offset                        */
5869 /*                                                                  */
5870 /* Function     - Dummy entry point until s390x supports aot.       */
5871 /*                                                                  */
5872 /* Returns      - Offset for patch.                                 */
5873 /*                                                                  */
5874 /*------------------------------------------------------------------*/
5875
5876 guint32
5877 mono_arch_get_patch_offset (guint8 *code)
5878 {
5879         return 0;
5880 }
5881
5882 /*========================= End of Function ========================*/
5883
5884 /*------------------------------------------------------------------*/
5885 /*                                                                  */
5886 /* Name         - mono_arch_context_get_int_reg.                    */
5887 /*                                                                  */
5888 /* Function     -                                                   */
5889 /*                                                                  */
5890 /* Returns      - Return a register from the context.               */
5891 /*                                                                  */
5892 /*------------------------------------------------------------------*/
5893
5894 mgreg_t
5895 mono_arch_context_get_int_reg (MonoContext *ctx, int reg)
5896 {
5897         return ((mgreg_t) ctx->uc_mcontext.gregs[reg]);
5898 }
5899
5900 /*========================= End of Function ========================*/
5901
5902 /*------------------------------------------------------------------*/
5903 /*                                                                  */
5904 /* Name         - mono_arch_context_set_int_reg.                    */
5905 /*                                                                  */
5906 /* Function     - Set a value in a specified register.              */
5907 /*                                                                  */
5908 /*------------------------------------------------------------------*/
5909
5910 void
5911 mono_arch_context_set_int_reg (MonoContext *ctx, int reg, mgreg_t val)
5912 {
5913         ctx->uc_mcontext.gregs[reg] = val;
5914 }
5915
5916 /*========================= End of Function ========================*/
5917
5918 /*------------------------------------------------------------------*/
5919 /*                                                                  */
5920 /* Name         - mono_arch_get_this_arg_from_call.                 */
5921 /*                                                                  */
5922 /* Function     -                                                   */
5923 /*                                                                  */
5924 /*------------------------------------------------------------------*/
5925
5926 gpointer
5927 mono_arch_get_this_arg_from_call (mgreg_t *regs, guint8 *code)
5928 {
5929         MonoLMF *lmf = (MonoLMF *) ((gchar *) regs - sizeof(MonoLMF));
5930
5931         return (gpointer) lmf->gregs [s390_r2];
5932 }
5933
5934 /*========================= End of Function ========================*/
5935
5936 /*------------------------------------------------------------------*/
5937 /*                                                                  */
5938 /* Name         - get_delegate_invoke_impl.                         */
5939 /*                                                                  */
5940 /* Function     -                                                   */
5941 /*                                                                  */
5942 /*------------------------------------------------------------------*/
5943
5944 static gpointer
5945 get_delegate_invoke_impl (gboolean has_target, guint32 param_count, guint32 *code_len, gboolean aot)
5946 {
5947         guint8 *code, *start;
5948
5949         if (has_target) {
5950                 int size = 32;
5951
5952                 start = code = mono_global_codeman_reserve (size);
5953
5954                 /* Replace the this argument with the target */
5955                 s390_lg   (code, s390_r1, 0, s390_r2, G_STRUCT_OFFSET(MonoDelegate, method_ptr));
5956                 s390_lg   (code, s390_r2, 0, s390_r2, G_STRUCT_OFFSET(MonoDelegate, target));
5957                 s390_br   (code, s390_r1);
5958                 g_assert ((code - start) <= size);
5959
5960                 mono_arch_flush_icache (start, size);
5961         } else {
5962                 int size, i;
5963
5964                 size = 32 + param_count * 8;
5965                 start = code = mono_global_codeman_reserve (size);
5966
5967                 s390_lg   (code, s390_r1, 0, s390_r2, G_STRUCT_OFFSET(MonoDelegate, method_ptr));
5968                 /* slide down the arguments */
5969                 for (i = 0; i < param_count; ++i) {
5970                         s390_lgr (code, (s390_r2 + i), (s390_r2 + i + 1));
5971                 }
5972                 s390_br   (code, s390_r1);
5973
5974                 g_assert ((code - start) <= size);
5975
5976                 mono_arch_flush_icache (start, size);
5977         }
5978
5979         if (code_len)
5980                 *code_len = code - start;
5981
5982         return start;
5983 }
5984
5985 /*========================= End of Function ========================*/
5986
5987 /*------------------------------------------------------------------*/
5988 /*                                                                  */
5989 /* Name         - mono_arch_get_delegate_invoke_impls.              */
5990 /*                                                                  */
5991 /* Function     -                                                   */
5992 /*                                                                  */
5993 /*------------------------------------------------------------------*/
5994
5995 GSList*
5996 mono_arch_get_delegate_invoke_impls (void)
5997 {
5998         GSList *res = NULL;
5999         guint8 *code;
6000         guint32 code_len;
6001         int i;
6002
6003         code = get_delegate_invoke_impl (TRUE, 0, &code_len, TRUE);
6004         res = g_slist_prepend (res, mono_tramp_info_create (g_strdup ("delegate_invoke_impl_has_target"), code, code_len, NULL, NULL));
6005
6006         for (i = 0; i < MAX_ARCH_DELEGATE_PARAMS; ++i) {
6007                 code = get_delegate_invoke_impl (FALSE, i, &code_len, TRUE);
6008                 res = g_slist_prepend (res, mono_tramp_info_create (g_strdup_printf ("delegate_invoke_impl_target_%d", i), code, code_len, NULL, NULL));
6009         }
6010
6011         return res;
6012 }
6013
6014 /*========================= End of Function ========================*/
6015
6016 /*------------------------------------------------------------------*/
6017 /*                                                                  */
6018 /* Name         - mono_arch_get_delegate_invoke_impl.               */
6019 /*                                                                  */
6020 /* Function     -                                                   */
6021 /*                                                                  */
6022 /*------------------------------------------------------------------*/
6023
6024 gpointer
6025 mono_arch_get_delegate_invoke_impl (MonoMethodSignature *sig, gboolean has_target)
6026 {
6027         guint8 *code, *start;
6028
6029         /* FIXME: Support more cases */
6030         if (MONO_TYPE_ISSTRUCT (sig->ret))
6031                 return NULL;
6032
6033         if (has_target) {
6034                 static guint8* cached = NULL;
6035
6036                 if (cached)
6037                         return cached;
6038
6039                 if (mono_aot_only)
6040                         start = mono_aot_get_trampoline ("delegate_invoke_impl_has_target");
6041                 else
6042                         start = get_delegate_invoke_impl (TRUE, 0, NULL, FALSE);
6043
6044                 mono_memory_barrier ();
6045
6046                 cached = start;
6047         } else {
6048                 static guint8* cache [MAX_ARCH_DELEGATE_PARAMS + 1] = {NULL};
6049                 int i;
6050
6051                 if (sig->param_count > MAX_ARCH_DELEGATE_PARAMS)
6052                         return NULL;
6053                 for (i = 0; i < sig->param_count; ++i)
6054                         if (!mono_is_regsize_var (sig->params [i]))
6055                                 return NULL;
6056
6057
6058                 code = cache [sig->param_count];
6059                 if (code)
6060                         return code;
6061
6062                 if (mono_aot_only) {
6063                         char *name = g_strdup_printf ("delegate_invoke_impl_target_%d", sig->param_count);
6064                         start = mono_aot_get_trampoline (name);
6065                         g_free (name);
6066                 } else {
6067                         start = get_delegate_invoke_impl (FALSE, sig->param_count, NULL, FALSE);
6068                 }
6069
6070                 mono_memory_barrier ();
6071
6072                 cache [sig->param_count] = start;
6073         }
6074         return start;
6075 }
6076
6077 /*========================= End of Function ========================*/
6078
6079 /*------------------------------------------------------------------*/
6080 /*                                                                  */
6081 /* Name         - mono_arch_build_imt_thunk.                        */
6082 /*                                                                  */
6083 /* Function     -                                                   */
6084 /*                                                                  */
6085 /*------------------------------------------------------------------*/
6086
6087 gpointer
6088 mono_arch_build_imt_thunk (MonoVTable *vtable, MonoDomain *domain,
6089                            MonoIMTCheckItem **imt_entries, int count,
6090                            gpointer fail_tramp)
6091 {
6092         int i;
6093         int size = 0;
6094         guchar *code, *start;
6095
6096         for (i = 0; i < count; ++i) {
6097                 MonoIMTCheckItem *item = imt_entries [i];
6098                 if (item->is_equals) {
6099                         if (item->check_target_idx) {
6100                                 if (!item->compare_done)
6101                                         item->chunk_size += CMP_SIZE + JUMP_SIZE;
6102                                 if (item->has_target_code)
6103                                         item->chunk_size += BR_SIZE + JUMP_SIZE + LOADCON_SIZE;
6104                                 else
6105                                         item->chunk_size += BR_SIZE + JUMP_SIZE + LOADCON_SIZE +
6106                                                             LOAD_SIZE;
6107                         } else {
6108                                 if (fail_tramp) {
6109                                         item->chunk_size += CMP_SIZE + 2 * BR_SIZE + JUMP_SIZE +
6110                                                             2 * LOADCON_SIZE;
6111                                         if (!item->has_target_code)
6112                                                 item->chunk_size += LOAD_SIZE;
6113                                 } else {
6114                                         item->chunk_size += LOADCON_SIZE + LOAD_SIZE + BR_SIZE;
6115 #if ENABLE_WRONG_METHOD_CHECK
6116                                         item->chunk_size += CMP_SIZE + JUMP_SIZE;
6117 #endif
6118                                 }
6119                         }
6120                 } else {
6121                         item->chunk_size += CMP_SIZE + JUMP_SIZE;
6122                         imt_entries [item->check_target_idx]->compare_done = TRUE;
6123                 }
6124                 size += item->chunk_size;
6125         }
6126
6127         if (fail_tramp)
6128                 code = mono_method_alloc_generic_virtual_thunk (domain, size);
6129         else
6130                 code = mono_domain_code_reserve (domain, size);
6131
6132         start = code;
6133
6134         for (i = 0; i < count; ++i) {
6135                 MonoIMTCheckItem *item = imt_entries [i];
6136                 item->code_target = (guint8 *) code;
6137                 if (item->is_equals) {
6138                         if (item->check_target_idx) {
6139                                 if (!item->compare_done) {
6140                                         s390_basr (code, s390_r13, s390_r0);
6141                                         s390_j    (code, 6);
6142                                         s390_llong(code, item->key);
6143                                         s390_lg   (code, s390_r0, 0, s390_r13, 4);
6144                                         s390_cgr  (code, s390_r0, MONO_ARCH_IMT_REG);
6145                                 }
6146                                 item->jmp_code = (guint8*) code;
6147                                 s390_jcl (code, S390_CC_NE, 0);
6148
6149                                 s390_basr (code, s390_r13, s390_r0);
6150                                 s390_j    (code, 6);
6151                                 if (item->has_target_code)  {
6152                                         s390_llong(code, item->value.target_code);
6153                                         s390_lg   (code, s390_r1, 0, s390_r13, 4);
6154                                 } else {
6155                                         s390_llong(code, (&(vtable->vtable [item->value.vtable_slot])));
6156                                         s390_lg   (code, s390_r1, 0, s390_r13, 4);
6157                                         s390_lg   (code, s390_r1, 0, s390_r1, 0);
6158                                 }
6159                                 s390_br   (code, s390_r1);
6160                         } else {
6161                                 if (fail_tramp) {
6162                                         gint64  target;
6163
6164                                         s390_basr (code, s390_r13, s390_r0);
6165                                         s390_j    (code, 6);
6166                                         s390_llong(code, item->key);
6167                                         s390_lg   (code, s390_r0, 0, s390_r13, 4);
6168                                         s390_cgr  (code, s390_r0, MONO_ARCH_IMT_REG);
6169                                         item->jmp_code = (guint8*) code;
6170                                         s390_jcl  (code, S390_CC_NE, 0);
6171                                         s390_basr (code, s390_r13, s390_r0);
6172                                         s390_j    (code, 6);
6173                                         if (item->has_target_code) {
6174                                                 s390_llong(code, item->value.target_code);
6175                                                 s390_lg   (code, s390_r1, 0, s390_r13, 4);
6176                                         } else {
6177                                                 g_assert (vtable);
6178                                                 s390_llong(code, (&(vtable->vtable [item->value.vtable_slot])));
6179                                                 s390_lg   (code, s390_r1, 0, s390_r13, 4);
6180                                                 s390_lg   (code, s390_r1, 0, s390_r1, 0);
6181                                         }
6182                                         s390_br   (code, s390_r1);
6183                                         target = S390_RELATIVE(code, item->jmp_code);
6184                                         s390_patch_rel(item->jmp_code+2, target);
6185                                         s390_basr (code, s390_r13, s390_r0);
6186                                         s390_j    (code, 6);
6187                                         s390_llong(code, fail_tramp);
6188                                         s390_lg   (code, s390_r1, 0, s390_r13, 4);
6189                                         s390_br   (code, s390_r1);
6190                                         item->jmp_code = NULL;
6191                                 } else {
6192                                 /* enable the commented code to assert on wrong method */
6193 #if ENABLE_WRONG_METHOD_CHECK
6194                                         g_assert_not_reached ();
6195 #endif
6196                                         s390_basr (code, s390_r13, s390_r0);
6197                                         s390_j    (code, 6);
6198                                         s390_llong(code, (&(vtable->vtable [item->value.vtable_slot])));
6199                                         s390_lg   (code, s390_r1, 0, s390_r13, 4);
6200                                         s390_lg   (code, s390_r1, 0, s390_r1, 0);
6201                                         s390_br   (code, s390_r1);
6202 #if ENABLE_WRONG_METHOD_CHECK
6203                                         g_assert_not_reached ();
6204 #endif
6205                                 }
6206                         }
6207                 } else {
6208                         s390_basr (code, s390_r13, s390_r0);
6209                         s390_j    (code, 6);
6210                         s390_llong(code, item->key);
6211                         s390_lg   (code, s390_r0, 0, s390_r13, 4);
6212                         s390_cgr  (code, MONO_ARCH_IMT_REG, s390_r0);
6213                         item->jmp_code = (guint8 *) code;
6214                         s390_jcl  (code, S390_CC_GE, 0);
6215                 }
6216         }
6217         /* patch the branches to get to the target items */
6218         for (i = 0; i < count; ++i) {
6219                 MonoIMTCheckItem *item = imt_entries [i];
6220                 if (item->jmp_code) {
6221                         if (item->check_target_idx) {
6222                                 gint64 offset;
6223                                 offset = S390_RELATIVE(imt_entries [item->check_target_idx]->code_target,
6224                                                        item->jmp_code);
6225                                 s390_patch_rel ((guchar *) item->jmp_code + 2, (guint64) offset);
6226                         }
6227                 }
6228         }
6229
6230         mono_arch_flush_icache ((guint8*)start, (code - start));
6231
6232         if (!fail_tramp)
6233                 mono_stats.imt_thunks_size += (code - start);
6234
6235         g_assert (code - start <= size);
6236
6237         return (start);
6238 }
6239
6240 /*========================= End of Function ========================*/
6241
6242 /*------------------------------------------------------------------*/
6243 /*                                                                  */
6244 /* Name         - mono_arch_find_imt_method.                        */
6245 /*                                                                  */
6246 /* Function     - Get the method address from MONO_ARCH_IMT_REG     */
6247 /*                found in the save area.                           */
6248 /*                                                                  */
6249 /*------------------------------------------------------------------*/
6250
6251 MonoMethod*
6252 mono_arch_find_imt_method (mgreg_t *regs, guint8 *code)
6253 {
6254         MonoLMF *lmf = (MonoLMF *) ((gchar *) regs - sizeof(MonoLMF));
6255
6256         return ((MonoMethod *) lmf->gregs [MONO_ARCH_IMT_REG]);
6257 }
6258
6259 /*========================= End of Function ========================*/
6260
6261 /*------------------------------------------------------------------*/
6262 /*                                                                  */
6263 /* Name         - mono_arch_find_static_call_vtable                 */
6264 /*                                                                  */
6265 /* Function     - Find the static call vtable.                      */
6266 /*                                                                  */
6267 /*------------------------------------------------------------------*/
6268
6269 MonoVTable*
6270 mono_arch_find_static_call_vtable (mgreg_t *regs, guint8 *code)
6271 {
6272         mgreg_t *r = (mgreg_t*)regs;
6273
6274         return (MonoVTable*)(gsize) r [MONO_ARCH_RGCTX_REG];
6275 }
6276
6277 /*========================= End of Function ========================*/
6278
6279 /*------------------------------------------------------------------*/
6280 /*                                                                  */
6281 /* Name         - mono_arch_get_cie_program                         */
6282 /*                                                                  */
6283 /* Function     - Find the static call vtable.                      */
6284 /*                                                                  */
6285 /*------------------------------------------------------------------*/
6286
6287 GSList*
6288 mono_arch_get_cie_program (void)
6289 {
6290         GSList *l = NULL;
6291
6292         mono_add_unwind_op_def_cfa (l, NULL, NULL, STK_BASE, 0);
6293
6294         return(l);
6295 }
6296
6297 /*========================= End of Function ========================*/
6298
6299 #ifdef MONO_ARCH_SOFT_DEBUG_SUPPORTED
6300
6301 /*------------------------------------------------------------------*/
6302 /*                                                                  */
6303 /* Name         - mono_arch_set_breakpoint.                         */
6304 /*                                                                  */
6305 /* Function     - Set a breakpoint at the native code corresponding */
6306 /*                to JI at NATIVE_OFFSET.  The location should      */
6307 /*                contain code emitted by OP_SEQ_POINT.             */
6308 /*                                                                  */
6309 /*------------------------------------------------------------------*/
6310
6311 void
6312 mono_arch_set_breakpoint (MonoJitInfo *ji, guint8 *ip)
6313 {
6314         guint8 *code = ip;
6315
6316         breakpointCode.pTrigger = bp_trigger_page;
6317         memcpy(code, (void *) &breakpointCode, BREAKPOINT_SIZE);
6318         code += BREAKPOINT_SIZE;
6319 }
6320
6321 /*========================= End of Function ========================*/
6322
6323 /*------------------------------------------------------------------*/
6324 /*                                                                  */
6325 /* Name         - mono_arch_clear_breakpoint.                       */
6326 /*                                                                  */
6327 /* Function     - Clear the breakpoint at IP.                       */
6328 /*                                                                  */
6329 /*------------------------------------------------------------------*/
6330
6331 void
6332 mono_arch_clear_breakpoint (MonoJitInfo *ji, guint8 *ip)
6333 {
6334         guint8 *code = ip;
6335         int i;
6336
6337         for (i = 0; i < (BREAKPOINT_SIZE / S390X_NOP_SIZE); i++)
6338                 s390_nop(code);
6339 }
6340
6341 /*========================= End of Function ========================*/
6342
6343 /*------------------------------------------------------------------*/
6344 /*                                                                  */
6345 /* Name         - mono_arch_is_breakpoint_event.                    */
6346 /*                                                                  */
6347 /* Function     -                                                   */
6348 /*                                                                  */
6349 /*------------------------------------------------------------------*/
6350
6351 gboolean
6352 mono_arch_is_breakpoint_event (void *info, void *sigctx)
6353 {
6354         siginfo_t* sinfo = (siginfo_t*) info;
6355         /* Sometimes the address is off by 4 */
6356         if (sinfo->si_addr >= bp_trigger_page && (guint8*)sinfo->si_addr <= (guint8*)bp_trigger_page + 128)
6357                 return TRUE;
6358         else
6359                 return FALSE;
6360 }
6361
6362 /*========================= End of Function ========================*/
6363
6364 /*------------------------------------------------------------------*/
6365 /*                                                                  */
6366 /* Name         - mono_arch_skip_breakpoint.                        */
6367 /*                                                                  */
6368 /* Function     - Modify the CTX so the IP is placed after the      */
6369 /*                breakpoint instruction, so when we resume, the    */
6370 /*                instruction is not executed again.                */
6371 /*                                                                  */
6372 /*------------------------------------------------------------------*/
6373
6374 void
6375 mono_arch_skip_breakpoint (MonoContext *ctx, MonoJitInfo *ji)
6376 {
6377         MONO_CONTEXT_SET_IP (ctx, (guint8*)MONO_CONTEXT_GET_IP (ctx) + BREAKPOINT_SIZE);
6378 }
6379
6380 /*========================= End of Function ========================*/
6381
6382 /*------------------------------------------------------------------*/
6383 /*                                                                  */
6384 /* Name         - mono_arch_start_single_stepping.                  */
6385 /*                                                                  */
6386 /* Function     - Start single stepping.                            */
6387 /*                                                                  */
6388 /*------------------------------------------------------------------*/
6389
6390 void
6391 mono_arch_start_single_stepping (void)
6392 {
6393         mono_mprotect (ss_trigger_page, mono_pagesize (), 0);
6394 }
6395
6396 /*========================= End of Function ========================*/
6397
6398 /*------------------------------------------------------------------*/
6399 /*                                                                  */
6400 /* Name         - mono_arch_stop_single_stepping.                   */
6401 /*                                                                  */
6402 /* Function     - Stop single stepping.                             */
6403 /*                                                                  */
6404 /*------------------------------------------------------------------*/
6405
6406 void
6407 mono_arch_stop_single_stepping (void)
6408 {
6409         mono_mprotect (ss_trigger_page, mono_pagesize (), MONO_MMAP_READ);
6410 }
6411
6412 /*========================= End of Function ========================*/
6413
6414 /*------------------------------------------------------------------*/
6415 /*                                                                  */
6416 /* Name         - mono_arch_is_single_step_event.                   */
6417 /*                                                                  */
6418 /* Function     - Return whether the machine state in sigctx cor-   */
6419 /*                responds to a single step event.                  */
6420 /*                                                                  */
6421 /*------------------------------------------------------------------*/
6422
6423 gboolean
6424 mono_arch_is_single_step_event (void *info, void *sigctx)
6425 {
6426         siginfo_t* sinfo = (siginfo_t*) info;
6427
6428         /* Sometimes the address is off by 4 */
6429         if (sinfo->si_addr >= ss_trigger_page && (guint8*)sinfo->si_addr <= (guint8*)ss_trigger_page + 128)
6430                 return TRUE;
6431         else
6432                 return FALSE;
6433 }
6434
6435 /*========================= End of Function ========================*/
6436
6437 /*------------------------------------------------------------------*/
6438 /*                                                                  */
6439 /* Name         - mono_arch_skip_single_step.                       */
6440 /*                                                                  */
6441 /* Function     - Modify the ctx so the IP is placed after the      */
6442 /*                single step trigger instruction, so that the      */
6443 /*                instruction is not executed again.                */
6444 /*                                                                  */
6445 /*------------------------------------------------------------------*/
6446
6447 void
6448 mono_arch_skip_single_step (MonoContext *ctx)
6449 {
6450         MONO_CONTEXT_SET_IP (ctx, (guint8*)MONO_CONTEXT_GET_IP (ctx) + BREAKPOINT_SIZE);
6451 }
6452
6453 /*========================= End of Function ========================*/
6454
6455 /*------------------------------------------------------------------*/
6456 /*                                                                  */
6457 /* Name         - mono_arch_create_seq_point_info.                  */
6458 /*                                                                  */
6459 /* Function     - Return a pointer to a data struction which is     */
6460 /*                used by the sequence point implementation in      */
6461 /*                AOTed code.                                       */
6462 /*                                                                  */
6463 /*------------------------------------------------------------------*/
6464
6465 gpointer
6466 mono_arch_get_seq_point_info (MonoDomain *domain, guint8 *code)
6467 {
6468         NOT_IMPLEMENTED;
6469         return NULL;
6470 }
6471
6472 /*========================= End of Function ========================*/
6473
6474 #endif