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 /*========================= End of Defines =========================*/
 250
 251 /*------------------------------------------------------------------*/
 252 /*                 I n c l u d e s                                  */
 253 /*------------------------------------------------------------------*/
 254
 255 #include "mini.h"
 256 #include <string.h>
 257
 258 #include <mono/metadata/appdomain.h>
 259 #include <mono/metadata/debug-helpers.h>
 260 #include <mono/metadata/profiler-private.h>
 261 #include <mono/utils/mono-math.h>
 262 #include <mono/utils/mono-mmap.h>
 263
 264 #include "mini-s390x.h"
 265 #include "cpu-s390x.h"
 266 #include "jit-icalls.h"
 267 #include "ir-emit.h"
 268
 269 /*========================= End of Includes ========================*/
 270
 271 /*------------------------------------------------------------------*/
 272 /*                 T y p e d e f s                                  */
 273 /*------------------------------------------------------------------*/
 274
 275 typedef struct {
 276         guint stack_size,
 277               local_size,
 278               code_size,
 279               parm_size,
 280               offset,
 281               offStruct,
 282               retStruct;
 283 } size_data;
 284
 285 /*------------------------------------------------------------------*/
 286 /* Used by the instrument_emit_epilog                               */
 287 /*------------------------------------------------------------------*/
 288
 289 enum {
 290         SAVE_NONE,
 291         SAVE_STRUCT,
 292         SAVE_ONE,
 293         SAVE_TWO,
 294         SAVE_R4,
 295         SAVE_R8
 296 };
 297
 298 typedef struct InstList InstList;
 299
 300 struct InstList {
 301         InstList *prev;
 302         InstList *next;
 303         MonoInst *data;
 304 };
 305
 306 typedef enum {
 307         RegTypeGeneral,
 308         RegTypeBase,
 309         RegTypeFP,
 310         RegTypeFPR4,
 311         RegTypeStructByVal,
 312         RegTypeStructByValInFP,
 313         RegTypeStructByAddr,
 314         RegTypeStructByAddrOnStack
 315 } ArgStorage;
 316
 317 typedef struct {
 318         gint32  offset;         /* offset from caller's stack */
 319         gint32  offparm;        /* offset from callee's stack */
 320         guint16 vtsize;         /* in param area */
 321         guint8  reg;
 322         ArgStorage regtype;
 323         guint32 size;           /* Size of structure used by RegTypeStructByVal */
 324         gint32  type;           /* Data type of argument */
 325 } ArgInfo;
 326
 327 typedef struct {
 328         int nargs;
 329         int lastgr;
 330         guint32 stack_usage;
 331         guint32 struct_ret;
 332         ArgInfo ret;
 333         ArgInfo sigCookie;
 334         size_data sz;
 335         int vret_arg_index;
 336         ArgInfo args [1];
 337 } CallInfo;
 338
 339 typedef struct {
 340         gint64  gr[5];          /* R2-R6                            */
 341         gdouble fp[3];          /* F0-F2                            */
 342 } __attribute__ ((packed)) RegParm;
 343
 344 typedef struct {
 345         RR_Format  basr;
 346         RI_Format  j;
 347         void       *pTrigger;
 348         RXY_Format lg;
 349         RXY_Format trigger;
 350 } __attribute__ ((packed)) breakpoint_t;
 351
 352 /*========================= End of Typedefs ========================*/
 353
 354 /*------------------------------------------------------------------*/
 355 /*                   P r o t o t y p e s                            */
 356 /*------------------------------------------------------------------*/
 357
 358 static void indent (int);
 359 static guint8 * backUpStackPtr(MonoCompile *, guint8 *);
 360 static void decodeParm (MonoType *, void *, int);
 361 static void enter_method (MonoMethod *, RegParm *, char *);
 362 static void leave_method (MonoMethod *, ...);
 363 static gboolean is_regsize_var (MonoType *);
 364 static inline void add_general (guint *, size_data *, ArgInfo *);
 365 static inline void add_stackParm (guint *, size_data *, ArgInfo *, gint);
 366 static inline void add_float (guint *, size_data *, ArgInfo *);
 367 static CallInfo * get_call_info (MonoCompile *, MonoMemPool *, MonoMethodSignature *, gboolean);
 368 static guchar * emit_float_to_int (MonoCompile *, guchar *, int, int, int, gboolean);
 369 gpointer mono_arch_get_lmf_addr (void);
 370 static guint8 * emit_load_volatile_arguments (guint8 *, MonoCompile *);
 371 static void catch_SIGILL(int, siginfo_t *, void *);
 372 static __inline__ void emit_unwind_regs(MonoCompile *, guint8 *, int, int, long);
 373
 374 /*========================= End of Prototypes ======================*/
 375
 376 /*------------------------------------------------------------------*/
 377 /*                 G l o b a l   V a r i a b l e s                  */
 378 /*------------------------------------------------------------------*/
 379
 380 int mono_exc_esp_offset = 0;
 381
 382 static int indent_level = 0;
 383
 384 int has_ld = 0;
 385
 386 static gboolean tls_offset_inited = FALSE;
 387
 388 static int appdomain_tls_offset = -1,
 389            thread_tls_offset = -1;
 390
 391 pthread_key_t lmf_addr_key;
 392
 393 gboolean lmf_addr_key_inited = FALSE;
 394
 395 facilityList_t facs;
 396
 397 #if 0
 398
 399 extern __thread MonoDomain *tls_appdomain;
 400 extern __thread MonoThread *tls_current_object;
 401 extern __thread gpointer   mono_lmf_addr;
 402
 403 #endif
 404
 405 /*
 406  * The code generated for sequence points reads from this location,
 407  * which is made read-only when single stepping is enabled.
 408  */
 409 static gpointer ss_trigger_page;
 410
 411 /*
 412  * Enabled breakpoints read from this trigger page
 413  */
 414 static gpointer bp_trigger_page;
 415
 416 breakpoint_t breakpointCode;
 417
 418 /*====================== End of Global Variables ===================*/
 419
 420 /*------------------------------------------------------------------*/
 421 /*                                                                  */
 422 /* Name         - mono_arch_regname                                 */
 423 /*                                                                  */
 424 /* Function     - Returns the name of the register specified by     */
 425 /*                the input parameter.                              */
 426 /*                                                                  */
 427 /*------------------------------------------------------------------*/
 428
 429 const char*
 430 mono_arch_regname (int reg) {
 431         static const char * rnames[] = {
 432                 "s390_r0", "s390_sp", "s390_r2", "s390_r3", "s390_r4",
 433                 "s390_r5", "s390_r6", "s390_r7", "s390_r8", "s390_r9",
 434                 "s390_r10", "s390_r11", "s390_r12", "s390_r13", "s390_r14",
 435                 "s390_r15"
 436         };
 437
 438         if (reg >= 0 && reg < 16)
 439                 return rnames [reg];
 440         else
 441                 return "unknown";
 442 }
 443
 444 /*========================= End of Function ========================*/
 445
 446 /*------------------------------------------------------------------*/
 447 /*                                                                  */
 448 /* Name         - mono_arch_fregname                                */
 449 /*                                                                  */
 450 /* Function     - Returns the name of the register specified by     */
 451 /*                the input parameter.                              */
 452 /*                                                                  */
 453 /*------------------------------------------------------------------*/
 454
 455 const char*
 456 mono_arch_fregname (int reg) {
 457         static const char * rnames[] = {
 458                 "s390_f0", "s390_f1", "s390_f2", "s390_f3", "s390_f4",
 459                 "s390_f5", "s390_f6", "s390_f7", "s390_f8", "s390_f9",
 460                 "s390_f10", "s390_f11", "s390_f12", "s390_f13", "s390_f14",
 461                 "s390_f15"
 462         };
 463
 464         if (reg >= 0 && reg < 16)
 465                 return rnames [reg];
 466         else
 467                 return "unknown";
 468 }
 469
 470 /*========================= End of Function ========================*/
 471
 472 /*------------------------------------------------------------------*/
 473 /*                                                                  */
 474 /* Name         - arch_get_argument_info                            */
 475 /*                                                                  */
 476 /* Function     - Gathers information on parameters such as size,   */
 477 /*                alignment, and padding. arg_info should be large  */
 478 /*                enough to hold param_count + 1 entries.           */
 479 /*                                                                  */
 480 /* Parameters   - @csig - Method signature                          */
 481 /*                @param_count - No. of parameters to consider      */
 482 /*                @arg_info - An array to store the result info     */
 483 /*                                                                  */
 484 /* Returns      - Size of the activation frame                      */
 485 /*                                                                  */
 486 /*------------------------------------------------------------------*/
 487
 488 int
 489 mono_arch_get_argument_info (MonoMethodSignature *csig,
 490                              int param_count,
 491                              MonoJitArgumentInfo *arg_info)
 492 {
 493         int k, frame_size = 0;
 494         int size, align, pad;
 495         int offset = 8;
 496
 497         if (MONO_TYPE_ISSTRUCT (csig->ret)) {
 498                 frame_size += sizeof (gpointer);
 499                 offset += 8;
 500         }
 501
 502         arg_info [0].offset = offset;
 503
 504         if (csig->hasthis) {
 505                 frame_size += sizeof (gpointer);
 506                 offset += 8;
 507         }
 508
 509         arg_info [0].size = frame_size;
 510
 511         for (k = 0; k < param_count; k++) {
 512
 513                 if (csig->pinvoke)
 514                         size = mono_type_native_stack_size (csig->params [k], (guint32 *) &align);
 515                 else
 516                         size = mini_type_stack_size (NULL, csig->params [k], &align);
 517
 518                 frame_size += pad = (align - (frame_size & (align - 1))) & (align - 1);
 519                 arg_info [k].pad = pad;
 520                 frame_size += size;
 521                 arg_info [k + 1].pad = 0;
 522                 arg_info [k + 1].size = size;
 523                 offset += pad;
 524                 arg_info [k + 1].offset = offset;
 525                 offset += size;
 526         }
 527
 528         align = MONO_ARCH_FRAME_ALIGNMENT;
 529         frame_size += pad = (align - (frame_size & (align - 1))) & (align - 1);
 530         arg_info [k].pad = pad;
 531
 532         return frame_size;
 533 }
 534
 535 /*========================= End of Function ========================*/
 536
 537 /*------------------------------------------------------------------*/
 538 /*                                                                  */
 539 /* Name         - emit_unwind_regs.                                 */
 540 /*                                                                  */
 541 /* Function     - Determines if a value can be returned in one or   */
 542 /*                two registers.                                    */
 543 /*                                                                  */
 544 /*------------------------------------------------------------------*/
 545
 546 static void __inline__
 547 emit_unwind_regs(MonoCompile *cfg, guint8 *code, int start, int end, long offset)
 548 {
 549         int i;
 550
 551         for (i = start; i < end; i++) {
 552                 mono_emit_unwind_op_offset (cfg, code, i, offset);
 553                 offset += sizeof(gulong);
 554         }
 555 }
 556
 557 /*========================= End of Function ========================*/
 558
 559 /*------------------------------------------------------------------*/
 560 /*                                                                  */
 561 /* Name         - retFitsInReg.                                     */
 562 /*                                                                  */
 563 /* Function     - Determines if a value can be returned in one or   */
 564 /*                two registers.                                    */
 565 /*                                                                  */
 566 /*------------------------------------------------------------------*/
 567
 568 static inline gboolean
 569 retFitsInReg(guint32 size)
 570 {
 571         switch (size) {
 572                 case 0:
 573                 case 1:
 574                 case 2:
 575                 case 4:
 576                 case 8:
 577                         return (TRUE);
 578                 break;
 579                 default:
 580                         return (FALSE);
 581         }
 582 }
 583
 584 /*========================= End of Function ========================*/
 585
 586 /*------------------------------------------------------------------*/
 587 /*                                                                  */
 588 /* Name         - backStackPtr.                                     */
 589 /*                                                                  */
 590 /* Function     - Restore Stack Pointer to previous frame.          */
 591 /*                                                                  */
 592 /*------------------------------------------------------------------*/
 593
 594 static inline guint8 *
 595 backUpStackPtr(MonoCompile *cfg, guint8 *code)
 596 {
 597         int stackSize = cfg->stack_usage;
 598
 599         if (cfg->frame_reg != STK_BASE)
 600                 s390_lgr (code, STK_BASE, cfg->frame_reg);
 601
 602         if (s390_is_imm16 (stackSize)) {
 603                 s390_aghi  (code, STK_BASE, stackSize);
 604         } else {
 605                 while (stackSize > 32767) {
 606                         s390_aghi  (code, STK_BASE, 32767);
 607                         stackSize -= 32767;
 608                 }
 609                 s390_aghi  (code, STK_BASE, stackSize);
 610         }
 611         return (code);
 612 }
 613
 614 /*========================= End of Function ========================*/
 615
 616 /*------------------------------------------------------------------*/
 617 /*                                                                  */
 618 /* Name         - indent                                            */
 619 /*                                                                  */
 620 /* Function     - Perform nice indenting to current level           */
 621 /*                                                                  */
 622 /*------------------------------------------------------------------*/
 623
 624 static void
 625 indent (int diff) {
 626         int v;
 627         if (diff < 0)
 628                 indent_level += diff;
 629         v = indent_level;
 630         printf("[%3d] ",v);
 631         while (v-- > 0) {
 632                 printf (". ");
 633         }
 634         if (diff > 0)
 635                 indent_level += diff;
 636 }
 637
 638 /*========================= End of Function ========================*/
 639
 640 /*------------------------------------------------------------------*/
 641 /*                                                                  */
 642 /* Name         - decodeParm                                        */
 643 /*                                                                  */
 644 /* Function     - Decode a parameter for the trace.                 */
 645 /*                                                                  */
 646 /*------------------------------------------------------------------*/
 647
 648 static void
 649 decodeParm(MonoType *type, void *curParm, int size)
 650 {
 651         guint32 simpleType;
 652
 653         if (type->byref) {
 654                 printf("[BYREF:%p], ", *((char **) curParm));
 655         } else {
 656                 simpleType = mono_type_get_underlying_type(type)->type;
 657 enum_parmtype:
 658                 switch (simpleType) {
 659                         case MONO_TYPE_I :
 660                                 printf ("[INTPTR:%p], ", *((int **) curParm));
 661                                 break;
 662                         case MONO_TYPE_U :
 663                                 printf ("[UINTPTR:%p], ", *((int **) curParm));
 664                                 break;
 665                         case MONO_TYPE_BOOLEAN :
 666                                 printf ("[BOOL:%ld], ", *((gint64 *) curParm));
 667                                 break;
 668                         case MONO_TYPE_CHAR :
 669                                 printf ("[CHAR:%c], ", *((int  *) curParm));
 670                                 break;
 671                         case MONO_TYPE_I1 :
 672                                 printf ("[INT1:%ld], ", *((gint64 *) curParm));
 673                                 break;
 674                         case MONO_TYPE_I2 :
 675                                 printf ("[INT2:%ld], ", *((gint64 *) curParm));
 676                                 break;
 677                         case MONO_TYPE_I4 :
 678                                 printf ("[INT4:%ld], ", *((gint64 *) curParm));
 679                                 break;
 680                         case MONO_TYPE_U1 :
 681                                 printf ("[UINT1:%lu], ", *((guint64 *) curParm));
 682                                 break;
 683                         case MONO_TYPE_U2 :
 684                                 printf ("[UINT2:%lu], ", *((guint64 *) curParm));
 685                                 break;
 686                         case MONO_TYPE_U4 :
 687                                 printf ("[UINT4:%lu], ", *((guint64 *) curParm));
 688                                 break;
 689                         case MONO_TYPE_U8 :
 690                                 printf ("[UINT8:%lu], ", *((guint64 *) curParm));
 691                                 break;
 692                         case MONO_TYPE_STRING : {
 693                                 MonoString *s = *((MonoString **) curParm);
 694                                 if (s) {
 695                                         g_assert (((MonoObject *) s)->vtable->klass == mono_defaults.string_class);
 696                                         printf("[STRING:%p:%s], ", s, mono_string_to_utf8(s));
 697                                 } else {
 698                                         printf("[STRING:null], ");
 699                                 }
 700                                 break;
 701                         }
 702                         case MONO_TYPE_CLASS :
 703                         case MONO_TYPE_OBJECT : {
 704                                 MonoObject *obj = *((MonoObject **) curParm);
 705                                 MonoClass *class;
 706                                 if ((obj) && (obj->vtable)) {
 707                                         printf("[CLASS/OBJ:");
 708                                         class = obj->vtable->klass;
 709                                         printf("%p [%p] ",obj,curParm);
 710                                         if (class == mono_defaults.string_class) {
 711                                                 printf("[STRING:%p:%s]",
 712                                                        obj, mono_string_to_utf8 ((MonoString *) obj));
 713                                         } else if (class == mono_defaults.int32_class) {
 714                                                 printf("[INT32:%p:%d]",
 715                                                         obj, *(gint32 *)((char *)obj + sizeof (MonoObject)));
 716                                         } else
 717                                                 printf("[%s.%s:%p]",
 718                                                        class->name_space, class->name, obj);
 719                                         printf("], ");
 720                                 } else {
 721                                         printf("[OBJECT:null], ");
 722                                 }
 723                                 break;
 724                         }
 725                         case MONO_TYPE_PTR :
 726                                 printf("[PTR:%p], ", *((gpointer **) (curParm)));
 727                                 break;
 728                         case MONO_TYPE_FNPTR :
 729                                 printf("[FNPTR:%p], ", *((gpointer **) (curParm)));
 730                                 break;
 731                         case MONO_TYPE_ARRAY :
 732                                 printf("[ARRAY:%p], ", *((gpointer **) (curParm)));
 733                                 break;
 734                         case MONO_TYPE_SZARRAY :
 735                                 printf("[SZARRAY:%p], ", *((gpointer **) (curParm)));
 736                                 break;
 737                         case MONO_TYPE_I8 :
 738                                 printf("[INT8:%ld], ", *((gint64 *) (curParm)));
 739                                 break;
 740                         case MONO_TYPE_R4 :
 741                                 printf("[FLOAT4:%g], ", *((float *) (curParm)));
 742                                 break;
 743                         case MONO_TYPE_R8 :
 744                                 printf("[FLOAT8:%g], ", *((double *) (curParm)));
 745                                 break;
 746                         case MONO_TYPE_VALUETYPE : {
 747                                 int i;
 748                                 MonoMarshalType *info;
 749
 750                                 if (type->data.klass->enumtype) {
 751                                         simpleType = mono_class_enum_basetype (type->data.klass)->type;
 752                                         printf("{VALUETYPE} - ");
 753                                         goto enum_parmtype;
 754                                 }
 755
 756                                 info = mono_marshal_load_type_info (type->data.klass);
 757
 758                                 if ((info->native_size == sizeof(float)) &&
 759                                     (info->num_fields  == 1) &&
 760                                     (info->fields[0].field->type->type == MONO_TYPE_R4)) {
 761                                                 printf("[FLOAT4:%f], ", *((float *) (curParm)));
 762                                         break;
 763                                 }
 764
 765                                 if ((info->native_size == sizeof(double)) &&
 766                                     (info->num_fields  == 1) &&
 767                                     (info->fields[0].field->type->type == MONO_TYPE_R8)) {
 768                                         printf("[FLOAT8:%g], ", *((double *) (curParm)));
 769                                         break;
 770                                 }
 771
 772                                 printf("[VALUETYPE:");
 773                                 for (i = 0; i < size; i++)
 774                                         printf("%02x,", *((guint8 *)curParm+i));
 775                                 printf("]");
 776                                 break;
 777                         }
 778                         case MONO_TYPE_TYPEDBYREF: {
 779                                 int i;
 780                                 printf("[TYPEDBYREF:");
 781                                 for (i = 0; i < size; i++)
 782                                         printf("%02x,", *((guint8 *)curParm+i));
 783                                 printf("]");
 784                                 break;
 785                         }
 786                         default :
 787                                 printf("[?? - %d], ",simpleType);
 788                 }
 789         }
 790 }
 791
 792 /*========================= End of Function ========================*/
 793
 794 /*------------------------------------------------------------------*/
 795 /*                                                                  */
 796 /* Name         - enter_method                                      */
 797 /*                                                                  */
 798 /* Function     - Perform tracing of the entry to the current       */
 799 /*                method.                                           */
 800 /*                                                                  */
 801 /*------------------------------------------------------------------*/
 802
 803 static void
 804 enter_method (MonoMethod *method, RegParm *rParm, char *sp)
 805 {
 806         int i, oParm = 0, iParm = 0;
 807         MonoClass *class;
 808         MonoObject *obj;
 809         MonoMethodSignature *sig;
 810         char *fname;
 811         guint64 ip;
 812         CallInfo *cinfo;
 813         ArgInfo *ainfo;
 814         void *curParm;
 815
 816         fname = mono_method_full_name (method, TRUE);
 817         indent (1);
 818         printf ("ENTER: %s ", fname);
 819         g_free (fname);
 820
 821         ip  = (*(guint64 *) (sp+S390_RET_ADDR_OFFSET));
 822         printf ("ip: %p sp: %p - ", (gpointer) ip, sp);
 823
 824         if (rParm == NULL)
 825                 return;
 826
 827         sig = mono_method_signature (method);
 828
 829         cinfo = get_call_info (NULL, NULL, sig, sig->pinvoke);
 830
 831         if (cinfo->struct_ret) {
 832                 printf ("[STRUCTRET:%p], ", (gpointer) rParm->gr[0]);
 833                 iParm = 1;
 834         }
 835
 836         if (sig->hasthis) {
 837                 gpointer *this = (gpointer *) rParm->gr[iParm];
 838                 obj = (MonoObject *) this;
 839                 if (method->klass->valuetype) {
 840                         if (obj) {
 841                                 printf("this:[value:%p:%016lx], ",
 842                                        this, *((guint64 *)(this+sizeof(MonoObject))));
 843                         } else
 844                                 printf ("this:[NULL], ");
 845                 } else {
 846                         if (obj) {
 847                                 class = obj->vtable->klass;
 848                                 if (class == mono_defaults.string_class) {
 849                                         printf ("this:[STRING:%p:%s], ",
 850                                                 obj, mono_string_to_utf8 ((MonoString *)obj));
 851                                 } else {
 852                                         printf ("this:%p[%s.%s], ",
 853                                                 obj, class->name_space, class->name);
 854                                 }
 855                         } else
 856                                 printf ("this:NULL, ");
 857                 }
 858                 oParm++;
 859         }
 860
 861         for (i = 0; i < sig->param_count; ++i) {
 862                 ainfo = &cinfo->args[i + oParm];
 863                 switch (ainfo->regtype) {
 864                         case RegTypeGeneral :
 865                                 decodeParm(sig->params[i], &(rParm->gr[ainfo->reg-2]), ainfo->size);
 866                                 break;
 867                         case RegTypeFP :
 868                                 decodeParm(sig->params[i], &(rParm->fp[ainfo->reg]), ainfo->size);
 869                                 break;
 870                         case RegTypeBase :
 871                                 decodeParm(sig->params[i], sp+ainfo->offset, ainfo->size);
 872                                 break;
 873                         case RegTypeStructByVal :
 874                                 if (ainfo->reg != STK_BASE) {
 875                                         int offset = sizeof(glong) - ainfo->size;
 876                                         curParm = &(rParm->gr[ainfo->reg-2])+offset;
 877                                 }
 878                                 else
 879                                         curParm = sp+ainfo->offset;
 880
 881                                 if (retFitsInReg (ainfo->vtsize))
 882                                         decodeParm(sig->params[i],
 883                                                    curParm,
 884                                                    ainfo->size);
 885                                 else
 886                                         decodeParm(sig->params[i],
 887                                                    *((char **) curParm),
 888                                                    ainfo->vtsize);
 889                                 break;
 890                         case RegTypeStructByAddr :
 891                                 if (ainfo->reg != STK_BASE)
 892                                         curParm = &(rParm->gr[ainfo->reg-2]);
 893                                 else
 894                                         curParm = sp+ainfo->offset;
 895
 896                                 decodeParm(sig->params[i],
 897                                            *((char **) curParm),
 898                                            ainfo->vtsize);
 899                                 break;
 900
 901                         default :
 902                                 printf("???, ");
 903                 }
 904         }
 905         printf("\n");
 906         g_free(cinfo);
 907 }
 908
 909 /*========================= End of Function ========================*/
 910
 911 /*------------------------------------------------------------------*/
 912 /*                                                                  */
 913 /* Name         - leave_method                                      */
 914 /*                                                                  */
 915 /* Function     -                                                   */
 916 /*                                                                  */
 917 /*------------------------------------------------------------------*/
 918
 919 static void
 920 leave_method (MonoMethod *method, ...)
 921 {
 922         MonoType *type;
 923         char *fname;
 924         guint64 ip;
 925         va_list ap;
 926
 927         va_start(ap, method);
 928
 929         fname = mono_method_full_name (method, TRUE);
 930         indent (-1);
 931         printf ("LEAVE: %s", fname);
 932         g_free (fname);
 933
 934         type = mono_method_signature (method)->ret;
 935
 936 handle_enum:
 937         switch (type->type) {
 938         case MONO_TYPE_VOID:
 939                 break;
 940         case MONO_TYPE_BOOLEAN: {
 941                 int val = va_arg (ap, int);
 942                 if (val)
 943                         printf ("[TRUE:%d]", val);
 944                 else
 945                         printf ("[FALSE]");
 946
 947                 break;
 948         }
 949         case MONO_TYPE_CHAR: {
 950                 int val = va_arg (ap, int);
 951                 printf ("[CHAR:%d]", val);
 952                 break;
 953         }
 954         case MONO_TYPE_I1: {
 955                 int val = va_arg (ap, int);
 956                 printf ("[INT1:%d]", val);
 957                 break;
 958         }
 959         case MONO_TYPE_U1: {
 960                 int val = va_arg (ap, int);
 961                 printf ("[UINT1:%d]", val);
 962                 break;
 963         }
 964         case MONO_TYPE_I2: {
 965                 int val = va_arg (ap, int);
 966                 printf ("[INT2:%d]", val);
 967                 break;
 968         }
 969         case MONO_TYPE_U2: {
 970                 int val = va_arg (ap, int);
 971                 printf ("[UINT2:%d]", val);
 972                 break;
 973         }
 974         case MONO_TYPE_I4: {
 975                 int val = va_arg (ap, int);
 976                 printf ("[INT4:%d]", val);
 977                 break;
 978         }
 979         case MONO_TYPE_U4: {
 980                 int val = va_arg (ap, int);
 981                 printf ("[UINT4:%d]", val);
 982                 break;
 983         }
 984         case MONO_TYPE_I: {
 985                 gint64 val = va_arg (ap, gint64);
 986                 printf ("[INT:%ld]", val);
 987                 printf("]");
 988                 break;
 989         }
 990         case MONO_TYPE_U: {
 991                 gint64 val = va_arg (ap, gint64);
 992                 printf ("[UINT:%lu]", val);
 993                 printf("]");
 994                 break;
 995         }
 996         case MONO_TYPE_STRING: {
 997                 MonoString *s = va_arg (ap, MonoString *);
 998 ;
 999                 if (s) {
1000                         g_assert (((MonoObject *)s)->vtable->klass == mono_defaults.string_class);
1001                         printf ("[STRING:%p:%s]", s, mono_string_to_utf8 (s));
1002                 } else
1003                         printf ("[STRING:null], ");
1004                 break;
1005         }
1006         case MONO_TYPE_CLASS:
1007         case MONO_TYPE_OBJECT: {
1008                 MonoObject *o = va_arg (ap, MonoObject *);
1009
1010                 if ((o) && (o->vtable)) {
1011                         if (o->vtable->klass == mono_defaults.boolean_class) {
1012                                 printf ("[BOOLEAN:%p:%d]", o, *((guint8 *)o + sizeof (MonoObject)));
1013                         } else if  (o->vtable->klass == mono_defaults.int32_class) {
1014                                 printf ("[INT32:%p:%d]", o, *((gint32 *)((char *)o + sizeof (MonoObject))));
1015                         } else if  (o->vtable->klass == mono_defaults.int64_class) {
1016                                 printf ("[INT64:%p:%ld]", o, *((gint64 *)((char *)o + sizeof (MonoObject))));
1017                         } else
1018                                 printf ("[%s.%s:%p]", o->vtable->klass->name_space, o->vtable->klass->name, o);
1019                 } else
1020                         printf ("[OBJECT:%p]", o);
1021
1022                 break;
1023         }
1024         case MONO_TYPE_PTR:
1025         case MONO_TYPE_FNPTR:
1026         case MONO_TYPE_ARRAY:
1027         case MONO_TYPE_SZARRAY: {
1028                 gpointer p = va_arg (ap, gpointer);
1029                 printf ("[result=%p]", p);
1030                 break;
1031         }
1032         case MONO_TYPE_I8: {
1033                 gint64 l =  va_arg (ap, gint64);
1034                 printf ("[LONG:%ld]", l);
1035                 break;
1036         }
1037         case MONO_TYPE_U8: {
1038                 guint64 l =  va_arg (ap, guint64);
1039                 printf ("[ULONG:%lu]", l);
1040                 break;
1041         }
1042         case MONO_TYPE_R4: {
1043                 double f = va_arg (ap, double);
1044                 printf ("[FLOAT4:%g]\n", f);
1045                 break;
1046         }
1047         case MONO_TYPE_R8: {
1048                 double f = va_arg (ap, double);
1049                 printf ("[FLOAT8:%g]\n", f);
1050                 break;
1051         }
1052         case MONO_TYPE_VALUETYPE: {
1053                 MonoMarshalType *info;
1054                 if (type->data.klass->enumtype) {
1055                         type = mono_class_enum_basetype (type->data.klass);
1056                         goto handle_enum;
1057                 } else {
1058                         int size, align;
1059
1060                         info = mono_marshal_load_type_info (type->data.klass);
1061
1062                         if ((info->native_size == sizeof(float)) &&
1063                             (info->num_fields  == 1) &&
1064                             (info->fields[0].field->type->type == MONO_TYPE_R4)) {
1065                                 double f = va_arg (ap, double);
1066                                 printf("[FLOAT4:%g]\n", (double) f);
1067                                 break;
1068                         }
1069
1070                         if ((info->native_size == sizeof(double)) &&
1071                             (info->num_fields  == 1) &&
1072                             (info->fields[0].field->type->type == MONO_TYPE_R8)) {
1073                                 double f = va_arg (ap, double);
1074                                 printf("[FLOAT8:%g]\n", f);
1075                                 break;
1076                         }
1077
1078                         size = mono_type_size (type, &align);
1079                         switch (size) {
1080                                 case 1: {
1081                                         guint32 p = va_arg (ap, guint32);
1082                                         printf ("[%02x]\n",p);
1083                                         break;
1084                                 }
1085                                 case 2: {
1086                                         guint32 p = va_arg (ap, guint32);
1087                                         printf ("[%04x]\n",p);
1088                                         break;
1089                                 }
1090                                 case 4: {
1091                                         guint32 p = va_arg (ap, guint32);
1092                                         printf ("[%08x]\n",p);
1093                                         break;
1094                                 }
1095                                 case 8: {
1096                                         guint64 p = va_arg (ap, guint64);
1097                                         printf ("[%016lx]\n",p);
1098                                         break;
1099                                 }
1100                                 default: {
1101                                         gpointer p = va_arg (ap, gpointer);
1102                                         printf ("[VALUETYPE] %p\n",p);
1103                                 }
1104                         }
1105                 }
1106                 break;
1107         }
1108         case MONO_TYPE_TYPEDBYREF: {
1109                 guint8 *p = va_arg (ap, gpointer);
1110                 int j, size, align;
1111                 size = mono_type_size (type, &align);
1112                 switch (size) {
1113                 case 1:
1114                 case 2:
1115                 case 4:
1116                 case 8:
1117                         printf ("[");
1118                         for (j = 0; p && j < size; j++)
1119                                 printf ("%02x,", p [j]);
1120                         printf ("]\n");
1121                         break;
1122                 default:
1123                         printf ("[TYPEDBYREF]\n");
1124                 }
1125         }
1126                 break;
1127         default:
1128                 printf ("(unknown return type %x)",
1129                         mono_method_signature (method)->ret->type);
1130         }
1131
1132         ip = ((gint64) __builtin_return_address (0));
1133         printf (" ip: %p\n", (gpointer) ip);
1134 }
1135
1136 /*========================= End of Function ========================*/
1137
1138 /*------------------------------------------------------------------*/
1139 /*                                                                  */
1140 /* Name         - catch_SIGILL                                      */
1141 /*                                                                  */
1142 /* Function     - Catch SIGILL as a result of testing for long      */
1143 /*                displacement facility.                            */
1144 /*                                                                  */
1145 /*------------------------------------------------------------------*/
1146
1147 void
1148 catch_SIGILL(int sigNo, siginfo_t *info, void *act) {
1149
1150         has_ld = 0;
1151
1152 }
1153
1154 /*========================= End of Function ========================*/
1155
1156 /*------------------------------------------------------------------*/
1157 /*                                                                  */
1158 /* Name         - mono_arch_cpu_init                                */
1159 /*                                                                  */
1160 /* Function     - Perform CPU specific initialization to execute    */
1161 /*                managed code.                                     */
1162 /*                                                                  */
1163 /*------------------------------------------------------------------*/
1164
1165 void
1166 mono_arch_cpu_init (void)
1167 {
1168         struct sigaction sa,
1169                          *oldSa = NULL;
1170         guint mode = 1;
1171
1172         /*--------------------------------------*/
1173         /* Set default rounding mode for FP     */
1174         /*--------------------------------------*/
1175         __asm__ ("SRNM\t%0\n\t"
1176                 : : "m" (mode));
1177
1178         /*--------------------------------------*/
1179         /* Determine if we have long displace-  */
1180         /* ment facility on this processor      */
1181         /*--------------------------------------*/
1182         sa.sa_sigaction = catch_SIGILL;
1183         sigemptyset (&sa.sa_mask);
1184         sa.sa_flags = SA_SIGINFO;
1185
1186         sigaction (SIGILL, &sa, oldSa);
1187
1188         /*--------------------------------------*/
1189         /* We test by executing the STY inst    */
1190         /*--------------------------------------*/
1191         __asm__ ("LGHI\t0,1\n\t"
1192                  "LA\t1,%0\n\t"
1193                  ".byte\t0xe3,0x00,0x10,0x00,0x00,0x50\n\t"
1194                 : "=m" (has_ld) : : "0", "1");
1195
1196         sigaction (SIGILL, oldSa, NULL);
1197 }
1198
1199 /*========================= End of Function ========================*/
1200
1201 /*------------------------------------------------------------------*/
1202 /*                                                                  */
1203 /* Name         - mono_arch_init.                                   */
1204 /*                                                                  */
1205 /* Function     - Initialize architecture specific code.            */
1206 /*                                                                  */
1207 /*------------------------------------------------------------------*/
1208
1209 void
1210 mono_arch_init (void)
1211 {
1212         guint8 *code;
1213
1214 #if 0
1215         /*
1216          * When we do an architectural level set at z9 or better
1217          * we can use the STFLE instruction to show us
1218          * what hardware facilities are available
1219          */
1220         int lFacility = sizeof(facs) % 8;
1221
1222         memset((char *) &facs, 0, sizeof(facs));
1223
1224         __asm__ ("      lgfr    0,%1\n"
1225                  "      stfle   %0\n"
1226                  : "=m" (facs) : "r" (lFacility) : "0", "cc");
1227 #endif
1228
1229         ss_trigger_page = mono_valloc (NULL, mono_pagesize (), MONO_MMAP_READ);
1230         bp_trigger_page = mono_valloc (NULL, mono_pagesize (), MONO_MMAP_READ);
1231         mono_mprotect (bp_trigger_page, mono_pagesize (), 0);
1232
1233         code = (guint8 *) &breakpointCode;
1234         s390_basr(code, s390_r13, 0);
1235         s390_j(code, 6);
1236         s390_llong(code, 0);
1237         s390_lg(code, s390_r13, 0, s390_r13, 4);
1238         s390_lg(code, s390_r0, 0, s390_r13, 0);
1239 }
1240
1241 /*========================= End of Function ========================*/
1242
1243 /*------------------------------------------------------------------*/
1244 /*                                                                  */
1245 /* Name         - mono_arch_cleanup.                                */
1246 /*                                                                  */
1247 /* Function     - Cleanup architecture specific code    .           */
1248 /*                                                                  */
1249 /*------------------------------------------------------------------*/
1250
1251 void
1252 mono_arch_cleanup (void)
1253 {
1254 }
1255
1256 /*========================= End of Function ========================*/
1257
1258 /*------------------------------------------------------------------*/
1259 /*                                                                  */
1260 /* Name         - mono_arch_cpu_optimizazions                       */
1261 /*                                                                  */
1262 /* Function     - Returns the optimizations supported on this CPU   */
1263 /*                                                                  */
1264 /*------------------------------------------------------------------*/
1265
1266 guint32
1267 mono_arch_cpu_optimizazions (guint32 *exclude_mask)
1268 {
1269         guint32 opts = 0;
1270
1271         /*----------------------------------------------------------*/
1272         /* No s390-specific optimizations yet                       */
1273         /*----------------------------------------------------------*/
1274         *exclude_mask = MONO_OPT_INLINE|MONO_OPT_LINEARS;
1275 //      *exclude_mask = MONO_OPT_INLINE;
1276         return opts;
1277 }
1278
1279 /*========================= End of Function ========================*/
1280
1281 /*------------------------------------------------------------------*/
1282 /*                                                                  */
1283 /* Name         -                                                   */
1284 /*                                                                  */
1285 /* Function     -                                                   */
1286 /*                                                                  */
1287 /*------------------------------------------------------------------*/
1288
1289 static gboolean
1290 is_regsize_var (MonoType *t) {
1291         if (t->byref)
1292                 return TRUE;
1293         switch (mono_type_get_underlying_type (t)->type) {
1294         case MONO_TYPE_I4:
1295         case MONO_TYPE_U4:
1296         case MONO_TYPE_I:
1297         case MONO_TYPE_I8:
1298         case MONO_TYPE_U8:
1299         case MONO_TYPE_U:
1300         case MONO_TYPE_PTR:
1301         case MONO_TYPE_FNPTR:
1302                 return TRUE;
1303         case MONO_TYPE_OBJECT:
1304         case MONO_TYPE_STRING:
1305         case MONO_TYPE_CLASS:
1306         case MONO_TYPE_SZARRAY:
1307         case MONO_TYPE_ARRAY:
1308                 return FALSE;
1309         case MONO_TYPE_VALUETYPE:
1310                 if (t->data.klass->enumtype)
1311                         return is_regsize_var (mono_class_enum_basetype (t->data.klass));
1312                 return FALSE;
1313         }
1314         return FALSE;
1315 }
1316
1317 /*========================= End of Function ========================*/
1318
1319 /*------------------------------------------------------------------*/
1320 /*                                                                  */
1321 /* Name         - mono_arch_get_allocatable_int_vars                */
1322 /*                                                                  */
1323 /* Function     -                                                   */
1324 /*                                                                  */
1325 /*------------------------------------------------------------------*/
1326
1327 GList *
1328 mono_arch_get_allocatable_int_vars (MonoCompile *cfg)
1329 {
1330         GList *vars = NULL;
1331         int i;
1332
1333         for (i = 0; i < cfg->num_varinfo; i++) {
1334                 MonoInst *ins = cfg->varinfo [i];
1335                 MonoMethodVar *vmv = MONO_VARINFO (cfg, i);
1336
1337                 /* unused vars */
1338                 if (vmv->range.first_use.abs_pos >= vmv->range.last_use.abs_pos)
1339                         continue;
1340
1341                 if (ins->flags & (MONO_INST_VOLATILE|MONO_INST_INDIRECT) ||
1342                     (ins->opcode != OP_LOCAL && ins->opcode != OP_ARG))
1343                         continue;
1344
1345                 /* we can only allocate 32 bit values */
1346                 if (is_regsize_var (ins->inst_vtype)) {
1347                         g_assert (MONO_VARINFO (cfg, i)->reg == -1);
1348                         g_assert (i == vmv->idx);
1349                         vars = mono_varlist_insert_sorted (cfg, vars, vmv, FALSE);
1350                 }
1351         }
1352
1353         return vars;
1354 }
1355
1356 /*========================= End of Function ========================*/
1357
1358 /*------------------------------------------------------------------*/
1359 /*                                                                  */
1360 /* Name         - mono_arch_global_int_regs                         */
1361 /*                                                                  */
1362 /* Function     - Return a list of usable integer registers.        */
1363 /*                                                                  */
1364 /*------------------------------------------------------------------*/
1365
1366 GList *
1367 mono_arch_get_global_int_regs (MonoCompile *cfg)
1368 {
1369         GList *regs = NULL;
1370         MonoMethodHeader *header;
1371         int i, top = 13;
1372
1373         header = cfg->header;
1374         if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
1375                 cfg->frame_reg = s390_r11;
1376
1377
1378         /* FIXME: s390_r12 is reserved for bkchain_reg. Only reserve it if needed */
1379         top = 12;
1380         for (i = 8; i < top; ++i) {
1381                 if (cfg->frame_reg != i)
1382                         regs = g_list_prepend (regs, GUINT_TO_POINTER (i));
1383         }
1384
1385         return regs;
1386 }
1387
1388 /*========================= End of Function ========================*/
1389
1390 /*------------------------------------------------------------------*/
1391 /*                                                                  */
1392 /* Name         -  mono_arch_flush_icache                           */
1393 /*                                                                  */
1394 /* Function     -  Flush the CPU icache.                            */
1395 /*                                                                  */
1396 /*------------------------------------------------------------------*/
1397
1398 void
1399 mono_arch_flush_icache (guint8 *code, gint size)
1400 {
1401 }
1402
1403 /*========================= End of Function ========================*/
1404
1405 /*------------------------------------------------------------------*/
1406 /*                                                                  */
1407 /* Name         - add_general                                       */
1408 /*                                                                  */
1409 /* Function     - Determine code and stack size incremements for a  */
1410 /*                parameter.                                        */
1411 /*                                                                  */
1412 /*------------------------------------------------------------------*/
1413
1414 static void inline
1415 add_general (guint *gr, size_data *sz, ArgInfo *ainfo)
1416 {
1417         if (*gr > S390_LAST_ARG_REG) {
1418                 sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1419                 ainfo->offset   = sz->stack_size;
1420                 ainfo->reg      = STK_BASE;
1421                 ainfo->regtype  = RegTypeBase;
1422                 sz->stack_size += sizeof(long);
1423                 sz->local_size += sizeof(long);
1424                 sz->offStruct  += sizeof(long);
1425                 sz->code_size  += 12;
1426         } else {
1427                 ainfo->reg      = *gr;
1428                 sz->code_size  += 8;
1429         }
1430         (*gr) ++;
1431 }
1432
1433 /*========================= End of Function ========================*/
1434
1435 /*------------------------------------------------------------------*/
1436 /*                                                                  */
1437 /* Name         - add_stackParm                                     */
1438 /*                                                                  */
1439 /* Function     - Determine code and stack size incremements for a  */
1440 /*                parameter.                                        */
1441 /*                                                                  */
1442 /*------------------------------------------------------------------*/
1443
1444 static void inline
1445 add_stackParm (guint *gr, size_data *sz, ArgInfo *ainfo, gint size)
1446 {
1447         if (*gr > S390_LAST_ARG_REG) {
1448                 sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1449                 ainfo->reg          = STK_BASE;
1450                 ainfo->offset   = sz->stack_size;
1451                 ainfo->regtype  = RegTypeStructByAddrOnStack;
1452                 sz->stack_size += sizeof (gpointer);
1453                 sz->parm_size  += sizeof(gpointer);
1454                 sz->offStruct  += sizeof(gpointer);
1455         } else {
1456                 ainfo->reg      = *gr;
1457                 ainfo->offset   = sz->stack_size;
1458                 ainfo->regtype  = RegTypeStructByAddr;
1459         }
1460         (*gr) ++;
1461         ainfo->offparm  = sz->offset;
1462         sz->offset      = S390_ALIGN(sz->offset+size, sizeof(long));
1463         ainfo->size     = size;
1464         ainfo->vtsize   = size;
1465         sz->parm_size  += size;
1466 }
1467
1468 /*========================= End of Function ========================*/
1469
1470 /*------------------------------------------------------------------*/
1471 /*                                                                  */
1472 /* Name         - add_float                                         */
1473 /*                                                                  */
1474 /* Function     - Determine code and stack size incremements for a  */
1475 /*                float parameter.                                  */
1476 /*                                                                  */
1477 /*------------------------------------------------------------------*/
1478
1479 static void inline
1480 add_float (guint *fr,  size_data *sz, ArgInfo *ainfo)
1481 {
1482         if ((*fr) <= S390_LAST_FPARG_REG) {
1483                 ainfo->regtype = RegTypeFP;
1484                 ainfo->reg     = *fr;
1485                 sz->code_size += 4;
1486                 (*fr) += 2;
1487         }
1488         else {
1489                 ainfo->offset   = sz->stack_size;
1490                 ainfo->reg      = STK_BASE;
1491                 ainfo->regtype  = RegTypeBase;
1492                 sz->code_size  += 4;
1493                 sz->stack_size += sizeof(double);
1494                 sz->local_size += sizeof(double);
1495                 sz->offStruct  += sizeof(double);
1496         }
1497 }
1498
1499 /*========================= End of Function ========================*/
1500
1501 /*------------------------------------------------------------------*/
1502 /*                                                                  */
1503 /* Name         - get_call_info                                     */
1504 /*                                                                  */
1505 /* Function     - Determine the amount of space required for code   */
1506 /*                and stack. In addition determine starting points  */
1507 /*                for stack-based parameters, and area for struct-  */
1508 /*                ures being returned on the stack.                 */
1509 /*                                                                  */
1510 /*------------------------------------------------------------------*/
1511
1512 static CallInfo *
1513 get_call_info (MonoCompile *cfg, MonoMemPool *mp, MonoMethodSignature *sig, gboolean is_pinvoke)
1514 {
1515         guint i, fr, gr, size, pstart;
1516         int nParm = sig->hasthis + sig->param_count;
1517         MonoType *ret_type;
1518         guint32 simpletype, align;
1519         CallInfo *cinfo;
1520         size_data *sz;
1521         MonoGenericSharingContext *gsctx = cfg ? cfg->generic_sharing_context : NULL;
1522
1523         if (mp)
1524                 cinfo = mono_mempool_alloc0 (mp, sizeof (CallInfo) + sizeof (ArgInfo) * nParm);
1525         else
1526                 cinfo = g_malloc0 (sizeof (CallInfo) + sizeof (ArgInfo) * nParm);
1527
1528         fr                = 0;
1529         gr                = s390_r2;
1530         nParm             = 0;
1531         cinfo->struct_ret = 0;
1532         sz                = &cinfo->sz;
1533         sz->retStruct     = 0;
1534         sz->offset        = 0;
1535         sz->offStruct     = S390_MINIMAL_STACK_SIZE;
1536         sz->stack_size    = S390_MINIMAL_STACK_SIZE;
1537         sz->code_size     = 0;
1538         sz->parm_size     = 0;
1539         sz->local_size    = 0;
1540         align             = 0;
1541         size              = 0;
1542
1543         /*----------------------------------------------------------*/
1544         /* We determine the size of the return code/stack in case we*/
1545         /* need to reserve a register to be used to address a stack */
1546         /* area that the callee will use.                           */
1547         /*----------------------------------------------------------*/
1548
1549         ret_type = mono_type_get_underlying_type (sig->ret);
1550         ret_type = mini_get_basic_type_from_generic (gsctx, ret_type);
1551         simpletype = ret_type->type;
1552 enum_retvalue:
1553         switch (simpletype) {
1554                 case MONO_TYPE_BOOLEAN:
1555                 case MONO_TYPE_I1:
1556                 case MONO_TYPE_U1:
1557                 case MONO_TYPE_I2:
1558                 case MONO_TYPE_U2:
1559                 case MONO_TYPE_CHAR:
1560                 case MONO_TYPE_I4:
1561                 case MONO_TYPE_U4:
1562                 case MONO_TYPE_I:
1563                 case MONO_TYPE_U:
1564                 case MONO_TYPE_CLASS:
1565                 case MONO_TYPE_OBJECT:
1566                 case MONO_TYPE_SZARRAY:
1567                 case MONO_TYPE_ARRAY:
1568                 case MONO_TYPE_PTR:
1569                 case MONO_TYPE_FNPTR:
1570                 case MONO_TYPE_STRING:
1571                         cinfo->ret.reg = s390_r2;
1572                         sz->code_size += 4;
1573                         break;
1574                 case MONO_TYPE_R4:
1575                 case MONO_TYPE_R8:
1576                         cinfo->ret.reg = s390_f0;
1577                         sz->code_size += 4;
1578                         break;
1579                 case MONO_TYPE_I8:
1580                 case MONO_TYPE_U8:
1581                         cinfo->ret.reg = s390_r2;
1582                         sz->code_size += 4;
1583                         break;
1584                 case MONO_TYPE_GENERICINST:
1585                         if (!mono_type_generic_inst_is_valuetype (sig->ret)) {
1586                                 cinfo->ret.reg = s390_r2;
1587                                 sz->code_size += 4;
1588                                 break;
1589                         }
1590                         /* Fall through */
1591                 case MONO_TYPE_VALUETYPE: {
1592                         MonoClass *klass = mono_class_from_mono_type (sig->ret);
1593                         if (klass->enumtype) {
1594                                 simpletype = mono_class_enum_basetype (klass)->type;
1595                                 goto enum_retvalue;
1596                         }
1597                         if (sig->pinvoke)
1598                                 size = mono_class_native_size (klass, &align);
1599                         else
1600                                 size = mono_class_value_size (klass, &align);
1601
1602                         cinfo->struct_ret = 1;
1603                         cinfo->ret.size   = size;
1604                         cinfo->ret.vtsize = size;
1605                         break;
1606                 }
1607                 case MONO_TYPE_TYPEDBYREF:
1608                         size = sizeof (MonoTypedRef);
1609                         cinfo->struct_ret = 1;
1610                         cinfo->ret.size   = size;
1611                         cinfo->ret.vtsize = size;
1612                         break;
1613                 case MONO_TYPE_VOID:
1614                         break;
1615                 default:
1616                         g_error ("Can't handle as return value 0x%x", sig->ret->type);
1617         }
1618
1619
1620         pstart = 0;
1621         /*
1622          * To simplify get_this_arg_reg () and LLVM integration, emit the vret arg after
1623          * the first argument, allowing 'this' to be always passed in the first arg reg.
1624          * Also do this if the first argument is a reference type, since virtual calls
1625          * are sometimes made using calli without sig->hasthis set, like in the delegate
1626          * invoke wrappers.
1627          */
1628         if (cinfo->struct_ret && !is_pinvoke &&
1629             (sig->hasthis ||
1630              (sig->param_count > 0 &&
1631               MONO_TYPE_IS_REFERENCE (mini_type_get_underlying_type (gsctx, sig->params [0]))))) {
1632                 if (sig->hasthis) {
1633                         cinfo->args[nParm].size = sizeof (gpointer);
1634                         add_general (&gr, sz, cinfo->args + nParm);
1635                 } else {
1636                         cinfo->args[nParm].size = sizeof (gpointer);
1637                         add_general (&gr, sz, &cinfo->args [sig->hasthis + nParm]);
1638                         pstart = 1;
1639                 }
1640                 nParm ++;
1641                 cinfo->vret_arg_index = 1;
1642                 cinfo->ret.reg = gr;
1643                 gr ++;
1644         } else {
1645                 /* this */
1646                 if (sig->hasthis) {
1647                         cinfo->args[nParm].size = sizeof (gpointer);
1648                         add_general (&gr, sz, cinfo->args + nParm);
1649                         nParm ++;
1650                 }
1651
1652                 if (cinfo->struct_ret) {
1653                         cinfo->ret.reg = gr;
1654                         gr ++;
1655                 }
1656         }
1657
1658         if ((sig->call_convention == MONO_CALL_VARARG) && (sig->param_count == 0)) {
1659                 gr = S390_LAST_ARG_REG + 1;
1660                 fr = S390_LAST_FPARG_REG + 1;
1661
1662                 /* Emit the signature cookie just before the implicit arguments */
1663                 add_general (&gr, sz, &cinfo->sigCookie);
1664         }
1665
1666         /*----------------------------------------------------------*/
1667         /* We determine the size of the parameter code and stack    */
1668         /* requirements by checking the types and sizes of the      */
1669         /* parameters.                                              */
1670         /*----------------------------------------------------------*/
1671
1672         for (i = pstart; i < sig->param_count; ++i) {
1673                 MonoType *ptype;
1674
1675                 /*--------------------------------------------------*/
1676                 /* Handle vararg type calls. All args are put on    */
1677                 /* the stack.                                       */
1678                 /*--------------------------------------------------*/
1679                 if ((sig->call_convention == MONO_CALL_VARARG) &&
1680                     (i == sig->sentinelpos)) {
1681                         gr = S390_LAST_ARG_REG + 1;
1682                         fr = S390_LAST_FPARG_REG + 1;
1683                         add_general (&gr, sz, &cinfo->sigCookie);
1684                 }
1685
1686                 if (sig->params [i]->byref) {
1687                         add_general (&gr, sz, cinfo->args+nParm);
1688                         cinfo->args[nParm].size = sizeof(gpointer);
1689                         nParm++;
1690                         continue;
1691                 }
1692
1693                 ptype = mono_type_get_underlying_type (sig->params [i]);
1694                 ptype = mini_get_basic_type_from_generic (gsctx, ptype);
1695                 simpletype = ptype->type;
1696                 cinfo->args[nParm].type = simpletype;
1697                 switch (simpletype) {
1698                 case MONO_TYPE_BOOLEAN:
1699                 case MONO_TYPE_I1:
1700                 case MONO_TYPE_U1:
1701                         cinfo->args[nParm].size = sizeof(char);
1702                         add_general (&gr, sz, cinfo->args+nParm);
1703                         nParm++;
1704                         break;
1705                 case MONO_TYPE_I2:
1706                 case MONO_TYPE_U2:
1707                 case MONO_TYPE_CHAR:
1708                         cinfo->args[nParm].size = sizeof(short);
1709                         add_general (&gr, sz, cinfo->args+nParm);
1710                         nParm++;
1711                         break;
1712                 case MONO_TYPE_I4:
1713                 case MONO_TYPE_U4:
1714                         cinfo->args[nParm].size = sizeof(int);
1715                         add_general (&gr, sz, cinfo->args+nParm);
1716                         nParm++;
1717                         break;
1718                 case MONO_TYPE_I:
1719                 case MONO_TYPE_U:
1720                 case MONO_TYPE_PTR:
1721                 case MONO_TYPE_FNPTR:
1722                 case MONO_TYPE_CLASS:
1723                 case MONO_TYPE_OBJECT:
1724                 case MONO_TYPE_STRING:
1725                 case MONO_TYPE_SZARRAY:
1726                 case MONO_TYPE_ARRAY:
1727                         cinfo->args[nParm].size = sizeof(gpointer);
1728                         add_general (&gr, sz, cinfo->args+nParm);
1729                         nParm++;
1730                         break;
1731                 case MONO_TYPE_I8:
1732                 case MONO_TYPE_U8:
1733                         cinfo->args[nParm].size = sizeof(long long);
1734                         add_general (&gr, sz, cinfo->args+nParm);
1735                         nParm++;
1736                         break;
1737                 case MONO_TYPE_R4:
1738                         cinfo->args[nParm].size = sizeof(float);
1739                         add_float (&fr, sz, cinfo->args+nParm);
1740                         nParm++;
1741                         break;
1742                 case MONO_TYPE_R8:
1743                         cinfo->args[nParm].size = sizeof(double);
1744                         add_float (&fr, sz, cinfo->args+nParm);
1745                         nParm++;
1746                         break;
1747                 case MONO_TYPE_GENERICINST:
1748                         if (!mono_type_generic_inst_is_valuetype (sig->params [i])) {
1749                                 cinfo->args[nParm].size = sizeof(gpointer);
1750                                 add_general (&gr, sz, cinfo->args+nParm);
1751                                 nParm++;
1752                                 break;
1753                         }
1754                         /* Fall through */
1755                 case MONO_TYPE_VALUETYPE: {
1756                         MonoMarshalType *info;
1757                         MonoClass *klass = mono_class_from_mono_type (sig->params [i]);
1758                         if (sig->pinvoke)
1759                                 size = mono_class_native_size (klass, &align);
1760                         else
1761                                 size = mono_class_value_size (klass, &align);
1762
1763                         info = mono_marshal_load_type_info (klass);
1764
1765                         if ((info->native_size == sizeof(float)) &&
1766                             (info->num_fields  == 1) &&
1767                             (info->fields[0].field->type->type == MONO_TYPE_R4)) {
1768                                 cinfo->args[nParm].size = sizeof(float);
1769                                 add_float(&fr, sz, cinfo->args+nParm);
1770                                 nParm ++;
1771                                 break;
1772                         }
1773
1774                         if ((info->native_size == sizeof(double)) &&
1775                             (info->num_fields  == 1) &&
1776                             (info->fields[0].field->type->type == MONO_TYPE_R8)) {
1777                                 cinfo->args[nParm].size = sizeof(double);
1778                                 add_float(&fr, sz, cinfo->args+nParm);
1779                                 nParm ++;
1780                                 break;
1781                         }
1782
1783                         cinfo->args[nParm].vtsize  = 0;
1784                         cinfo->args[nParm].size    = 0;
1785
1786                         switch (size) {
1787                                 /*----------------------------------*/
1788                                 /* On S/390, structures of size 1,  */
1789                                 /* 2, 4, and 8 bytes are passed in  */
1790                                 /* (a) register(s).                 */
1791                                 /*----------------------------------*/
1792                                 case 0:
1793                                 case 1:
1794                                 case 2:
1795                                 case 4:
1796                                 case 8:
1797                                         add_general(&gr, sz, cinfo->args+nParm);
1798                                         cinfo->args[nParm].size    = size;
1799                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1800                                         nParm++;
1801                                         sz->local_size            += sizeof(long);
1802                                         break;
1803                                 default:
1804                                         add_stackParm(&gr, sz, cinfo->args+nParm, size);
1805                                         nParm++;
1806                         }
1807                 }
1808                         break;
1809                 case MONO_TYPE_TYPEDBYREF: {
1810                         int size = sizeof (MonoTypedRef);
1811
1812                         cinfo->args[nParm].vtsize  = 0;
1813                         cinfo->args[nParm].size    = 0;
1814
1815                         switch (size) {
1816                                 /*----------------------------------*/
1817                                 /* On S/390, structures of size 1,  */
1818                                 /* 2, 4, and 8 bytes are passed in  */
1819                                 /* (a) register(s).                 */
1820                                 /*----------------------------------*/
1821                                 case 0:
1822                                 case 1:
1823                                 case 2:
1824                                 case 4:
1825                                 case 8:
1826                                         add_general(&gr, sz, cinfo->args+nParm);
1827                                         cinfo->args[nParm].size    = size;
1828                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1829                                         nParm++;
1830                                         sz->local_size            += sizeof(long);
1831                                         break;
1832                                 default:
1833                                         add_stackParm(&gr, sz, cinfo->args+nParm, size);
1834                                         nParm++;
1835                         }
1836                 }
1837                         break;
1838                 default:
1839                         g_error ("Can't trampoline 0x%x", sig->params [i]->type);
1840                 }
1841         }
1842
1843         /*----------------------------------------------------------*/
1844         /* Handle the case where there are no implicit arguments    */
1845         /*----------------------------------------------------------*/
1846         if ((sig->call_convention == MONO_CALL_VARARG) &&
1847             (nParm > 0) &&
1848             (!sig->pinvoke) &&
1849             (sig->param_count == sig->sentinelpos)) {
1850                 gr = S390_LAST_ARG_REG + 1;
1851                 fr = S390_LAST_FPARG_REG + 1;
1852                 add_general (&gr, sz, &cinfo->sigCookie);
1853         }
1854
1855         /*----------------------------------------------------------*/
1856         /* If we are passing a structure back then if it won't be   */
1857         /* in a register(s) then we make room at the end of the     */
1858         /* parameters that may have been placed on the stack        */
1859         /*----------------------------------------------------------*/
1860         if (cinfo->struct_ret) {
1861                 cinfo->ret.offset = sz->stack_size;
1862                 switch (cinfo->ret.size) {
1863                 case 0:
1864                 case 1:
1865                 case 2:
1866                 case 4:
1867                 case 8:
1868                         break;
1869                 default:
1870                         sz->stack_size   += S390_ALIGN(cinfo->ret.size, align);
1871                 }
1872         }
1873
1874         cinfo->lastgr   = gr;
1875         sz->stack_size  = sz->stack_size + sz->local_size + sz->parm_size +
1876                           sz->offset;
1877         sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1878
1879         return (cinfo);
1880 }
1881
1882 /*========================= End of Function ========================*/
1883
1884 /*------------------------------------------------------------------*/
1885 /*                                                                  */
1886 /* Name         - mono_arch_allocate_vars                           */
1887 /*                                                                  */
1888 /* Function     - Set var information according to the calling      */
1889 /*                convention for S/390. The local var stuff should  */
1890 /*                most likely be split in another method.           */
1891 /*                                                                  */
1892 /* Parameter    - @m - Compile unit.                                */
1893 /*                                                                  */
1894 /*------------------------------------------------------------------*/
1895
1896 void
1897 mono_arch_allocate_vars (MonoCompile *cfg)
1898 {
1899         MonoMethodSignature *sig;
1900         MonoMethodHeader *header;
1901         MonoInst *inst;
1902         CallInfo *cinfo;
1903         int iParm, iVar, offset, align, size, curinst;
1904         int frame_reg = STK_BASE;
1905         int sArg, eArg;
1906
1907         header  = cfg->header;
1908
1909         cfg->flags |= MONO_CFG_HAS_SPILLUP;
1910
1911         /*---------------------------------------------------------*/
1912         /* We use the frame register also for any method that has  */
1913         /* filter clauses. This way, when the handlers are called, */
1914         /* the code will reference local variables using the frame */
1915         /* reg instead of the stack pointer: if we had to restore  */
1916         /* the stack pointer, we'd corrupt the method frames that  */
1917         /* are already on the stack (since filters get called      */
1918         /* before stack unwinding happens) when the filter code    */
1919         /* would call any method.                                  */
1920         /*---------------------------------------------------------*/
1921         if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
1922                 frame_reg = s390_r11;
1923
1924         cfg->frame_reg = frame_reg;
1925
1926         cfg->arch.bkchain_reg = -1;
1927
1928         if (frame_reg != STK_BASE)
1929                 cfg->used_int_regs |= 1 << frame_reg;
1930
1931         sig     = mono_method_signature (cfg->method);
1932
1933         cinfo   = get_call_info (cfg, cfg->mempool, sig, sig->pinvoke);
1934
1935         if (!cinfo->struct_ret) {
1936                 switch (mono_type_get_underlying_type (sig->ret)->type) {
1937                 case MONO_TYPE_VOID:
1938                         break;
1939                 default:
1940                         cfg->ret->opcode = OP_REGVAR;
1941                         cfg->ret->dreg   = s390_r2;
1942                         break;
1943                 }
1944         }
1945
1946         /*--------------------------------------------------------------*/
1947         /* local vars are at a positive offset from the stack pointer   */
1948         /* also note that if the function uses alloca, we use s390_r11  */
1949         /* to point at the local variables.                             */
1950         /* add parameter area size for called functions                 */
1951         /*--------------------------------------------------------------*/
1952         if (cfg->param_area == 0)
1953                 offset = S390_MINIMAL_STACK_SIZE;
1954         else
1955                 offset = cfg->param_area;
1956
1957         cfg->sig_cookie = 0;
1958
1959         if (cinfo->struct_ret) {
1960                 inst               = cfg->vret_addr;
1961                 offset             = S390_ALIGN(offset, sizeof(gpointer));
1962                 inst->inst_offset  = offset;
1963                 inst->opcode       = OP_REGOFFSET;
1964                 inst->inst_basereg = frame_reg;
1965                 offset            += sizeof(gpointer);
1966                 if (G_UNLIKELY (cfg->verbose_level > 1)) {
1967                         printf ("vret_addr =");
1968                         mono_print_ins (cfg->vret_addr);
1969                 }
1970         }
1971
1972         if (sig->hasthis) {
1973                 inst = cfg->args [0];
1974                 if (inst->opcode != OP_REGVAR) {
1975                         inst->opcode       = OP_REGOFFSET;
1976                         inst->inst_basereg = frame_reg;
1977                         offset             = S390_ALIGN(offset, sizeof(gpointer));
1978                         inst->inst_offset  = offset;
1979                         offset            += sizeof (gpointer);
1980                 }
1981                 curinst = sArg = 1;
1982         } else {
1983                 curinst = sArg = 0;
1984         }
1985
1986         eArg = sig->param_count + sArg;
1987
1988         if (sig->call_convention == MONO_CALL_VARARG)
1989                 cfg->sig_cookie += S390_MINIMAL_STACK_SIZE;
1990
1991         for (iParm = sArg; iParm < eArg; ++iParm) {
1992                 inst = cfg->args [curinst];
1993                 if (inst->opcode != OP_REGVAR) {
1994                         switch (cinfo->args[iParm].regtype) {
1995                         case RegTypeStructByAddr : {
1996                                 MonoInst *indir;
1997
1998                                 size = sizeof (gpointer);
1999
2000                                 inst->opcode       = OP_REGOFFSET;
2001                                 inst->inst_basereg = frame_reg;
2002                                 offset             = S390_ALIGN (offset, sizeof (gpointer));
2003                                 inst->inst_offset  = offset;
2004
2005                                 /* Add a level of indirection */
2006                                 MONO_INST_NEW (cfg, indir, 0);
2007                                 *indir          = *inst;
2008                                 inst->opcode    = OP_VTARG_ADDR;
2009                                 inst->inst_left = indir;
2010                         }
2011                                 break;
2012                         case RegTypeStructByAddrOnStack : {
2013                                 MonoInst *indir;
2014
2015                                 size = sizeof (gpointer);
2016
2017                                 /* Similar to the == STK_BASE case below */
2018                                 cfg->arch.bkchain_reg = s390_r12;
2019                                 cfg->used_int_regs |= 1 << cfg->arch.bkchain_reg;
2020
2021                                 inst->opcode = OP_REGOFFSET;
2022                                 inst->dreg = mono_alloc_preg (cfg);
2023                                 inst->inst_basereg = cfg->arch.bkchain_reg;
2024                                 inst->inst_offset = cinfo->args [iParm].offset;
2025
2026                                 /* Add a level of indirection */
2027                                 MONO_INST_NEW (cfg, indir, 0);
2028                                 *indir = *inst;
2029                                 inst->opcode = OP_VTARG_ADDR;
2030                                 inst->inst_left = indir;
2031                                 break;
2032                         }
2033                         case RegTypeStructByVal :
2034                                 size               = cinfo->args[iParm].size;
2035                                 offset             = S390_ALIGN(offset, size);
2036                                 inst->opcode       = OP_REGOFFSET;
2037                                 inst->inst_basereg = frame_reg;
2038                                 inst->inst_offset  = offset;
2039                                 break;
2040                         default :
2041                                 if (cinfo->args [iParm].reg == STK_BASE) {
2042                                         /*
2043                                          * These arguments are in the previous frame, so we can't
2044                                          * compute their offset from the current frame pointer right
2045                                          * now, since cfg->stack_offset is not yet known, so dedicate a
2046                                          * register holding the previous frame pointer.
2047                                          */
2048                                         cfg->arch.bkchain_reg = s390_r12;
2049                                         cfg->used_int_regs |= 1 << cfg->arch.bkchain_reg;
2050
2051                                         inst->opcode       = OP_REGOFFSET;
2052                                         inst->inst_basereg = cfg->arch.bkchain_reg;
2053                                         size               = (cinfo->args[iParm].size < 8
2054                                                                           ? 8 - cinfo->args[iParm].size
2055                                                                           : 0);
2056                                         inst->inst_offset  = cinfo->args [iParm].offset + size;
2057                                         size = sizeof (long);
2058                                 } else {
2059                                         inst->opcode       = OP_REGOFFSET;
2060                                         inst->inst_basereg = frame_reg;
2061                                         size               = (cinfo->args[iParm].size < 8
2062                                                                           ? sizeof(int)
2063                                                                           : sizeof(long));
2064                                         offset             = S390_ALIGN(offset, size);
2065                                         if (cfg->method->wrapper_type == MONO_WRAPPER_MANAGED_TO_NATIVE)
2066                                                 inst->inst_offset  = offset;
2067                                         else
2068                                                 inst->inst_offset  = offset + (8 - size);
2069                                 }
2070                                 break;
2071                         }
2072 #if 0
2073                         if ((sig->call_convention == MONO_CALL_VARARG) &&
2074                             (cinfo->args[iParm].regtype != RegTypeGeneral) &&
2075                             (iParm < sig->sentinelpos))
2076                                 cfg->sig_cookie += size;
2077 printf("%s %4d cookine %x\n",__FUNCTION__,__LINE__,cfg->sig_cookie);
2078 #endif
2079
2080                         offset += MAX(size, 8);
2081                 }
2082                 curinst++;
2083         }
2084
2085         curinst = cfg->locals_start;
2086         for (iVar = curinst; iVar < cfg->num_varinfo; ++iVar) {
2087                 inst = cfg->varinfo [iVar];
2088                 if ((inst->flags & MONO_INST_IS_DEAD) ||
2089                     (inst->opcode == OP_REGVAR))
2090                         continue;
2091
2092                 /*--------------------------------------------------*/
2093                 /* inst->backend.is_pinvoke indicates native sized  */
2094                 /* value typs this is used by the pinvoke wrappers  */
2095                 /* when they call functions returning structure     */
2096                 /*--------------------------------------------------*/
2097                 if (inst->backend.is_pinvoke && MONO_TYPE_ISSTRUCT (inst->inst_vtype))
2098                         size = mono_class_native_size (mono_class_from_mono_type(inst->inst_vtype),
2099                                                        (guint32 *) &align);
2100                 else
2101                         size = mono_type_size (inst->inst_vtype, &align);
2102
2103                 offset             = S390_ALIGN(offset, align);
2104                 inst->inst_offset  = offset;
2105                 inst->opcode       = OP_REGOFFSET;
2106                 inst->inst_basereg = frame_reg;
2107                 offset            += size;
2108                 DEBUG (g_print("allocating local %d to %ld, size: %d\n",
2109                                 iVar, inst->inst_offset, size));
2110         }
2111
2112         /*------------------------------------------------------*/
2113         /* Allow space for the trace method stack area if needed*/
2114         /*------------------------------------------------------*/
2115         if (mono_jit_trace_calls != NULL && mono_trace_eval (cfg->method))
2116                 offset += S390_TRACE_STACK_SIZE;
2117
2118         /*------------------------------------------------------*/
2119         /* Reserve space to save LMF and caller saved registers */
2120         /*------------------------------------------------------*/
2121         if (cfg->method->save_lmf)
2122                 offset += sizeof (MonoLMF);
2123
2124         /*------------------------------------------------------*/
2125         /* align the offset                                     */
2126         /*------------------------------------------------------*/
2127         cfg->stack_offset = S390_ALIGN(offset, S390_STACK_ALIGNMENT);
2128
2129         /*------------------------------------------------------*/
2130         /* Fix offsets for args whose value is in parent frame  */
2131         /*------------------------------------------------------*/
2132         for (iParm = sArg; iParm < eArg; ++iParm) {
2133                 inst = cfg->args [iParm];
2134
2135                 if (inst->opcode == OP_S390_STKARG) {
2136                         inst->opcode = OP_REGOFFSET;
2137                         inst->inst_offset += cfg->stack_offset;
2138                 }
2139         }
2140 }
2141
2142 /*========================= End of Function ========================*/
2143
2144 /*------------------------------------------------------------------*/
2145 /*                                                                  */
2146 /* Name         - mono_arch_create_vars                             */
2147 /*                                                                  */
2148 /*------------------------------------------------------------------*/
2149
2150 void
2151 mono_arch_create_vars (MonoCompile *cfg)
2152 {
2153         MonoMethodSignature *sig;
2154         CallInfo *cinfo;
2155
2156         sig = mono_method_signature (cfg->method);
2157
2158         cinfo = get_call_info (cfg, cfg->mempool, sig, sig->pinvoke);
2159
2160         if (cinfo->struct_ret) {
2161                 cfg->vret_addr = mono_compile_create_var (cfg, &mono_defaults.int_class->byval_arg, OP_ARG);
2162                 if (G_UNLIKELY (cfg->verbose_level > 1)) {
2163                         printf ("vret_addr = ");
2164                         mono_print_ins (cfg->vret_addr);
2165                 }
2166         }
2167 }
2168
2169 /*========================= End of Function ========================*/
2170
2171 /*------------------------------------------------------------------*/
2172 /*                                                                  */
2173 /* Name         - add_outarg_reg2.                                  */
2174 /*                                                                  */
2175 /*------------------------------------------------------------------*/
2176
2177 static void
2178 add_outarg_reg2 (MonoCompile *cfg, MonoCallInst *call, ArgStorage storage, int reg, MonoInst *tree)
2179 {
2180         MonoInst *ins;
2181
2182         switch (storage) {
2183         case RegTypeGeneral:
2184                 MONO_INST_NEW (cfg, ins, OP_MOVE);
2185                 ins->dreg = mono_alloc_ireg (cfg);
2186                 ins->sreg1 = tree->dreg;
2187                 MONO_ADD_INS (cfg->cbb, ins);
2188                 mono_call_inst_add_outarg_reg (cfg, call, ins->dreg, reg, FALSE);
2189                 break;
2190         case RegTypeFP:
2191                 MONO_INST_NEW (cfg, ins, OP_FMOVE);
2192                 ins->dreg = mono_alloc_freg (cfg);
2193                 ins->sreg1 = tree->dreg;
2194                 MONO_ADD_INS (cfg->cbb, ins);
2195                 mono_call_inst_add_outarg_reg (cfg, call, ins->dreg, reg, TRUE);
2196                 break;
2197         case RegTypeFPR4:
2198                 MONO_INST_NEW (cfg, ins, OP_S390_SETF4RET);
2199                 ins->dreg = mono_alloc_freg (cfg);
2200                 ins->sreg1 = tree->dreg;
2201                 MONO_ADD_INS (cfg->cbb, ins);
2202                 mono_call_inst_add_outarg_reg (cfg, call, ins->dreg, reg, TRUE);
2203                 break;
2204         default:
2205                 g_assert_not_reached ();
2206         }
2207 }
2208
2209 /*========================= End of Function ========================*/
2210
2211 /*------------------------------------------------------------------*/
2212 /*                                                                  */
2213 /* Name         - emit_sig_cookie.                                  */
2214 /*                                                                  */
2215 /*------------------------------------------------------------------*/
2216
2217 static void
2218 emit_sig_cookie (MonoCompile *cfg, MonoCallInst *call, CallInfo *cinfo)
2219 {
2220         MonoMethodSignature *tmpSig;
2221         MonoInst *sig_arg;
2222
2223         cfg->disable_aot = TRUE;
2224
2225         /*----------------------------------------------------------*/
2226         /* mono_ArgIterator_Setup assumes the signature cookie is   */
2227         /* passed first and all the arguments which were before it  */
2228         /* passed on the stack after the signature. So compensate   */
2229         /* by passing a different signature.                        */
2230         /*----------------------------------------------------------*/
2231         tmpSig = mono_metadata_signature_dup (call->signature);
2232         tmpSig->param_count -= call->signature->sentinelpos;
2233         tmpSig->sentinelpos  = 0;
2234         if (tmpSig->param_count > 0)
2235                 memcpy (tmpSig->params,
2236                         call->signature->params + call->signature->sentinelpos,
2237                         tmpSig->param_count * sizeof(MonoType *));
2238
2239         MONO_INST_NEW (cfg, sig_arg, OP_ICONST);
2240         sig_arg->dreg = mono_alloc_ireg (cfg);
2241         sig_arg->inst_p0 = tmpSig;
2242         MONO_ADD_INS (cfg->cbb, sig_arg);
2243
2244         MONO_EMIT_NEW_STORE_MEMBASE (cfg, OP_STORE_MEMBASE_REG, STK_BASE,
2245                                      cinfo->sigCookie.offset, sig_arg->dreg);
2246 }
2247
2248 /*========================= End of Function ========================*/
2249
2250 /*------------------------------------------------------------------*/
2251 /*                                                                  */
2252 /* Name         - mono_arch_emit_call                               */
2253 /*                                                                  */
2254 /*------------------------------------------------------------------*/
2255
2256 void
2257 mono_arch_emit_call (MonoCompile *cfg, MonoCallInst *call)
2258 {
2259         MonoInst *in;
2260         MonoMethodSignature *sig;
2261         MonoInst *ins;
2262         int i, n, lParamArea;
2263         CallInfo *cinfo;
2264         ArgInfo *ainfo = NULL;
2265         int stackSize;
2266         MonoMethodHeader *header;
2267         int frmReg;
2268
2269         sig = call->signature;
2270         n = sig->param_count + sig->hasthis;
2271         DEBUG (g_print ("Call requires: %d parameters\n",n));
2272
2273         cinfo = get_call_info (cfg, cfg->mempool, sig, sig->pinvoke);
2274
2275         stackSize         = cinfo->sz.stack_size + cinfo->sz.local_size +
2276                             cinfo->sz.parm_size + cinfo->sz.offset;
2277         call->stack_usage = MAX(stackSize, call->stack_usage);
2278         lParamArea        = MAX((call->stack_usage-S390_MINIMAL_STACK_SIZE-cinfo->sz.parm_size), 0);
2279         cfg->param_area   = MAX(((signed) cfg->param_area), lParamArea);
2280         cfg->flags       |= MONO_CFG_HAS_CALLS;
2281
2282         if (cinfo->struct_ret) {
2283                 MONO_INST_NEW (cfg, ins, OP_MOVE);
2284                 ins->sreg1 = call->vret_var->dreg;
2285                 ins->dreg = mono_alloc_preg (cfg);
2286                 MONO_ADD_INS (cfg->cbb, ins);
2287                 mono_call_inst_add_outarg_reg (cfg, call, ins->dreg, cinfo->ret.reg, FALSE);
2288         }
2289
2290         header = cfg->header;
2291         if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
2292                 frmReg = s390_r11;
2293         else
2294                 frmReg = STK_BASE;
2295
2296         for (i = 0; i < n; ++i) {
2297                 MonoType *t;
2298
2299                 ainfo = cinfo->args + i;
2300                 if (i >= sig->hasthis)
2301                         t = sig->params [i - sig->hasthis];
2302                 else
2303                         t = &mono_defaults.int_class->byval_arg;
2304                 t = mono_type_get_underlying_type (t);
2305
2306                 in = call->args [i];
2307
2308                 if ((sig->call_convention == MONO_CALL_VARARG) &&
2309                     (!sig->pinvoke) &&
2310                     (i == sig->sentinelpos)) {
2311                         emit_sig_cookie (cfg, call, cinfo);
2312                 }
2313
2314                 switch (ainfo->regtype) {
2315                 case RegTypeGeneral:
2316                         add_outarg_reg2 (cfg, call, ainfo->regtype, ainfo->reg, in);
2317                         break;
2318                 case RegTypeFP:
2319                         if (MONO_TYPE_ISSTRUCT (t)) {
2320                                 /* Valuetype passed in one fp register */
2321                                 ainfo->regtype = RegTypeStructByValInFP;
2322                                 /* Fall through */
2323                         } else {
2324                                 if (ainfo->size == 4)
2325                                         ainfo->regtype = RegTypeFPR4;
2326                                 add_outarg_reg2 (cfg, call, ainfo->regtype, ainfo->reg, in);
2327                                 break;
2328                         }
2329                 case RegTypeStructByVal:
2330                 case RegTypeStructByAddr:
2331                 case RegTypeStructByAddrOnStack: {
2332                         guint32 align;
2333                         guint32 size;
2334
2335                         if (sig->params [i - sig->hasthis]->type == MONO_TYPE_TYPEDBYREF) {
2336                                 size = sizeof (MonoTypedRef);
2337                                 align = sizeof (gpointer);
2338                         }
2339                         else
2340                                 if (sig->pinvoke)
2341                                         size = mono_type_native_stack_size (&in->klass->byval_arg, &align);
2342                                 else {
2343                                         /*
2344                                          * Other backends use mono_type_stack_size (), but that
2345                                          * aligns the size to 8, which is larger than the size of
2346                                          * the source, leading to reads of invalid memory if the
2347                                          * source is at the end of address space.
2348                                          */
2349                                         size = mono_class_value_size (in->klass, &align);
2350                                 }
2351
2352                         g_assert (in->klass);
2353
2354                         ainfo->offparm += cinfo->sz.offStruct;
2355
2356                         MONO_INST_NEW (cfg, ins, OP_OUTARG_VT);
2357                         ins->sreg1 = in->dreg;
2358                         ins->klass = in->klass;
2359                         ins->backend.size = ainfo->size;
2360                         ins->inst_p0 = call;
2361                         ins->inst_p1 = mono_mempool_alloc (cfg->mempool, sizeof (ArgInfo));
2362                         memcpy (ins->inst_p1, ainfo, sizeof (ArgInfo));
2363
2364                         MONO_ADD_INS (cfg->cbb, ins);
2365
2366                         if (ainfo->regtype == RegTypeStructByAddr) {
2367                                 /*
2368                                  * We use OP_OUTARG_VT to copy the valuetype to a stack location, then
2369                                  * use the normal OUTARG opcodes to pass the address of the location to
2370                                  * the callee.
2371                                  */
2372                                 int treg = mono_alloc_preg (cfg);
2373                                 MONO_EMIT_NEW_BIALU_IMM (cfg, OP_ADD_IMM, treg,
2374                                                          frmReg, ainfo->offparm);
2375                                 mono_call_inst_add_outarg_reg (cfg, call, treg, ainfo->reg, FALSE);
2376                         } else if (ainfo->regtype == RegTypeStructByAddrOnStack) {
2377                                 /* The address of the valuetype is passed on the stack */
2378                                 int treg = mono_alloc_preg (cfg);
2379                                 MONO_EMIT_NEW_BIALU_IMM (cfg, OP_ADD_IMM, treg,
2380                                                          frmReg, ainfo->offparm);
2381                                 MONO_EMIT_NEW_STORE_MEMBASE (cfg, OP_STORE_MEMBASE_REG,
2382                                                              ainfo->reg, ainfo->offset, treg);
2383                         }
2384                         break;
2385                 }
2386                 case RegTypeBase:
2387                         if (!t->byref && t->type == MONO_TYPE_R4) {
2388                                 MONO_EMIT_NEW_STORE_MEMBASE (cfg, OP_STORER4_MEMBASE_REG,
2389                                                              STK_BASE, ainfo->offset + 4,
2390                                                              in->dreg);
2391                         } else if (!t->byref && (t->type == MONO_TYPE_R8)) {
2392                                 MONO_EMIT_NEW_STORE_MEMBASE (cfg, OP_STORER8_MEMBASE_REG,
2393                                                              STK_BASE, ainfo->offset,
2394                                                              in->dreg);
2395                         } else {
2396                                 MONO_INST_NEW (cfg, ins, OP_STORE_MEMBASE_REG);
2397                                 ins->inst_destbasereg = STK_BASE;
2398                                 ins->inst_offset = ainfo->offset;
2399                                 ins->sreg1 = in->dreg;
2400
2401 #if 0
2402                                 /* This is needed by MonoTypedRef->value to point to the correct data */
2403                                 if ((sig->call_convention == MONO_CALL_VARARG) &&
2404                                         (i >= sig->sentinelpos)) {
2405                                         switch (ainfo->size) {
2406                                         case 1:
2407                                                 ins->opcode = OP_STOREI1_MEMBASE_REG;
2408                                                 break;
2409                                         case 2:
2410                                                 ins->opcode = OP_STOREI2_MEMBASE_REG;
2411                                                 break;
2412                                         case 4:
2413                                                 ins->opcode = OP_STOREI4_MEMBASE_REG;
2414                                                 break;
2415                                         default:
2416                                                 break;
2417                                         }
2418                                 }
2419 #endif
2420
2421                                 MONO_ADD_INS (cfg->cbb, ins);
2422                         }
2423                         break;
2424                 default:
2425                         g_assert_not_reached ();
2426                         break;
2427                 }
2428         }
2429
2430         /*
2431          * Handle the case where there are no implicit arguments
2432          */
2433         if ((sig->call_convention == MONO_CALL_VARARG) &&
2434             (!sig->pinvoke) &&
2435             (i == sig->sentinelpos)) {
2436                 emit_sig_cookie (cfg, call, cinfo);
2437         }
2438 }
2439
2440 /*========================= End of Function ========================*/
2441
2442 /*------------------------------------------------------------------*/
2443 /*                                                                  */
2444 /* Name         - mono_arch_emit_outarg_vt                          */
2445 /*                                                                  */
2446 /*------------------------------------------------------------------*/
2447
2448 void
2449 mono_arch_emit_outarg_vt (MonoCompile *cfg, MonoInst *ins, MonoInst *src)
2450 {
2451         MonoCallInst *call = (MonoCallInst*)ins->inst_p0;
2452         ArgInfo *ainfo = (ArgInfo*)ins->inst_p1;
2453         int size = ins->backend.size;
2454
2455         if (ainfo->regtype == RegTypeStructByVal) {
2456                 /*
2457                                 arg->ins.sreg1  = ainfo->reg;
2458                                 arg->ins.opcode = OP_OUTARG_VT;
2459                                 arg->size       = ainfo->size;
2460                                 arg->offset     = ainfo->offset;
2461                                 arg->offPrm     = ainfo->offparm + cinfo->sz.offStruct;
2462                 */
2463                 if (ainfo->reg != STK_BASE) {
2464                         MONO_OUTPUT_VTR (cfg, size, ainfo->reg, src->dreg, 0);
2465                 } else {
2466                         MONO_OUTPUT_VTS (cfg, size, ainfo->reg, ainfo->offset,
2467                                                           src->dreg, 0);
2468                 }
2469         } else if (ainfo->regtype == RegTypeStructByValInFP) {
2470                 int dreg = mono_alloc_freg (cfg);
2471
2472                 if (ainfo->size == 4) {
2473                         MONO_EMIT_NEW_LOAD_MEMBASE_OP (cfg, OP_LOADR4_MEMBASE, dreg, src->dreg, 0);
2474                         MONO_EMIT_NEW_UNALU (cfg, OP_S390_SETF4RET, dreg, dreg);
2475                 } else {
2476                         g_assert (ainfo->size == 8);
2477
2478                         MONO_EMIT_NEW_LOAD_MEMBASE_OP (cfg, OP_LOADR8_MEMBASE, dreg, src->dreg, 0);
2479                 }
2480
2481                 mono_call_inst_add_outarg_reg (cfg, call, dreg, ainfo->reg, TRUE);
2482         } else {
2483                 MonoMethodHeader *header;
2484                 int srcReg;
2485
2486                 header = mono_method_get_header (cfg->method);
2487                 if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
2488                         srcReg = s390_r11;
2489                 else
2490                         srcReg = STK_BASE;
2491
2492                 MONO_EMIT_NEW_MOVE (cfg, srcReg, ainfo->offparm,
2493                                                          src->dreg, 0, size);
2494         }
2495 }
2496
2497 /*========================= End of Function ========================*/
2498
2499 /*------------------------------------------------------------------*/
2500 /*                                                                  */
2501 /* Name         - mono_arch_emit_setret                             */
2502 /*                                                                  */
2503 /*------------------------------------------------------------------*/
2504
2505 void
2506 mono_arch_emit_setret (MonoCompile *cfg, MonoMethod *method, MonoInst *val)
2507 {
2508         MonoType *ret = mono_type_get_underlying_type (mono_method_signature (method)->ret);
2509
2510         if (!ret->byref) {
2511                 if (ret->type == MONO_TYPE_R4) {
2512                         MONO_EMIT_NEW_UNALU (cfg, OP_S390_SETF4RET, s390_f0, val->dreg);
2513                         return;
2514                 } else if (ret->type == MONO_TYPE_R8) {
2515                         MONO_EMIT_NEW_UNALU (cfg, OP_FMOVE, s390_f0, val->dreg);
2516                         return;
2517                 }
2518         }
2519
2520         MONO_EMIT_NEW_UNALU (cfg, OP_MOVE, cfg->ret->dreg, val->dreg);
2521 }
2522
2523 /*========================= End of Function ========================*/
2524
2525 /*------------------------------------------------------------------*/
2526 /*                                                                  */
2527 /* Name         - mono_arch_instrument_mem_needs                    */
2528 /*                                                                  */
2529 /* Function     - Allow tracing to work with this interface (with   */
2530 /*                an optional argument).                            */
2531 /*                                                                  */
2532 /*------------------------------------------------------------------*/
2533
2534 void
2535 mono_arch_instrument_mem_needs (MonoMethod *method, int *stack, int *code)
2536 {
2537         /* no stack room needed now (may be needed for FASTCALL-trace support) */
2538         *stack = 0;
2539         /* split prolog-epilog requirements? */
2540         *code = 50; /* max bytes needed: check this number */
2541 }
2542
2543 /*========================= End of Function ========================*/
2544
2545 /*------------------------------------------------------------------*/
2546 /*                                                                  */
2547 /* Name         - mono_arch_instrument_prolog                       */
2548 /*                                                                  */
2549 /* Function     - Create an "instrumented" prolog.                  */
2550 /*                                                                  */
2551 /*------------------------------------------------------------------*/
2552
2553 void*
2554 mono_arch_instrument_prolog (MonoCompile *cfg, void *func, void *p,
2555                              gboolean enable_arguments)
2556 {
2557         guchar  *code = p;
2558         int     parmOffset,
2559                 fpOffset,
2560                 baseReg;
2561
2562         parmOffset = cfg->stack_usage - S390_TRACE_STACK_SIZE;
2563         if (cfg->method->save_lmf)
2564                 parmOffset -= sizeof(MonoLMF);
2565         fpOffset   = parmOffset + (5*sizeof(gpointer));
2566         if ((!has_ld) && (fpOffset > 4096)) {
2567                 s390_lgr (code, s390_r12, STK_BASE);
2568                 baseReg = s390_r12;
2569                 while (fpOffset > 4096) {
2570                         s390_aghi (code, baseReg, 4096);
2571                         fpOffset   -= 4096;
2572                         parmOffset -= 4096;
2573                 }
2574         } else {
2575                 baseReg = STK_BASE;
2576         }
2577
2578         s390_stmg (code, s390_r2, s390_r6, STK_BASE, parmOffset);
2579         if (has_ld) {
2580                 s390_stdy (code, s390_f0, 0, STK_BASE, fpOffset);
2581                 s390_stdy (code, s390_f2, 0, STK_BASE, fpOffset+sizeof(gdouble));
2582                 s390_stdy (code, s390_f4, 0, STK_BASE, fpOffset+2*sizeof(gdouble));
2583                 s390_stdy (code, s390_f6, 0, STK_BASE, fpOffset+3*sizeof(gdouble));
2584         } else {
2585                 s390_std  (code, s390_f0, 0, baseReg, fpOffset);
2586                 s390_std  (code, s390_f2, 0, baseReg, fpOffset+sizeof(gdouble));
2587                 s390_std  (code, s390_f4, 0, baseReg, fpOffset+2*sizeof(gdouble));
2588                 s390_std  (code, s390_f6, 0, baseReg, fpOffset+3*sizeof(gdouble));
2589         }
2590         s390_basr (code, s390_r13, 0);
2591         s390_j    (code, 10);
2592         s390_llong(code, cfg->method);
2593         s390_llong(code, func);
2594         s390_lg   (code, s390_r2, 0, s390_r13, 4);
2595         if (has_ld)
2596                 s390_lay  (code, s390_r3, 0, STK_BASE, parmOffset);
2597         else
2598                 s390_la   (code, s390_r3, 0, baseReg, parmOffset);
2599         s390_lgr  (code, s390_r4, STK_BASE);
2600         s390_aghi (code, s390_r4, cfg->stack_usage);
2601         s390_lg   (code, s390_r1, 0, s390_r13, 12);
2602         s390_basr (code, s390_r14, s390_r1);
2603         if (has_ld) {
2604                 s390_ldy  (code, s390_f6, 0, STK_BASE, fpOffset+3*sizeof(gdouble));
2605                 s390_ldy  (code, s390_f4, 0, STK_BASE, fpOffset+2*sizeof(gdouble));
2606                 s390_ldy  (code, s390_f2, 0, STK_BASE, fpOffset+sizeof(gdouble));
2607                 s390_ldy  (code, s390_f0, 0, STK_BASE, fpOffset);
2608         } else {
2609                 s390_ld   (code, s390_f6, 0, baseReg, fpOffset+3*sizeof(gdouble));
2610                 s390_ld   (code, s390_f4, 0, baseReg, fpOffset+2*sizeof(gdouble));
2611                 s390_ld   (code, s390_f2, 0, baseReg, fpOffset+sizeof(gdouble));
2612                 s390_ld   (code, s390_f0, 0, baseReg, fpOffset);
2613         }
2614         s390_lmg  (code, s390_r2, s390_r6, STK_BASE, parmOffset);
2615
2616         return code;
2617 }
2618
2619 /*========================= End of Function ========================*/
2620
2621 /*------------------------------------------------------------------*/
2622 /*                                                                  */
2623 /* Name         - mono_arch_instrument_epilog                       */
2624 /*                                                                  */
2625 /* Function     - Create an epilog that will handle the returned    */
2626 /*                values used in instrumentation.                   */
2627 /*                                                                  */
2628 /*------------------------------------------------------------------*/
2629
2630 void*
2631 mono_arch_instrument_epilog_full (MonoCompile *cfg, void *func, void *p, gboolean enable_arguments, gboolean preserve_argument_registers)
2632 {
2633         guchar     *code = p;
2634         int        save_mode = SAVE_NONE,
2635                    saveOffset;
2636         MonoMethod *method = cfg->method;
2637         int        rtype = mono_type_get_underlying_type (mono_method_signature (method)->ret)->type;
2638
2639         saveOffset = cfg->stack_usage - S390_TRACE_STACK_SIZE;
2640         if (method->save_lmf)
2641                 saveOffset -= sizeof(MonoLMF);
2642
2643 handle_enum:
2644         switch (rtype) {
2645         case MONO_TYPE_VOID:
2646                 /* special case string .ctor icall */
2647                 if (strcmp (".ctor", method->name) && method->klass == mono_defaults.string_class)
2648                         save_mode = SAVE_ONE;
2649                 else
2650                         save_mode = SAVE_NONE;
2651                 break;
2652         case MONO_TYPE_I8:
2653         case MONO_TYPE_U8:
2654                 save_mode = SAVE_ONE;
2655                 break;
2656         case MONO_TYPE_R4:
2657                 save_mode = SAVE_R4;
2658                 break;
2659         case MONO_TYPE_R8:
2660                 save_mode = SAVE_R8;
2661                 break;
2662         case MONO_TYPE_VALUETYPE:
2663                 if (mono_method_signature (method)->ret->data.klass->enumtype) {
2664                         rtype = mono_class_enum_basetype (mono_method_signature (method)->ret->data.klass)->type;
2665                         goto handle_enum;
2666                 }
2667                 save_mode = SAVE_STRUCT;
2668                 break;
2669         default:
2670                 save_mode = SAVE_ONE;
2671                 break;
2672         }
2673
2674         switch (save_mode) {
2675         case SAVE_ONE:
2676                 s390_stg (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2677                 if (enable_arguments) {
2678                         s390_lgr (code, s390_r3, s390_r2);
2679                 }
2680                 break;
2681         case SAVE_R4:
2682                 s390_std (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2683                 if (enable_arguments) {
2684                         s390_ldebr (code, s390_f0, s390_f0);
2685                 }
2686                 break;
2687         case SAVE_R8:
2688                 s390_std (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2689                 break;
2690         case SAVE_STRUCT:
2691                 s390_stg (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2692                 if (enable_arguments) {
2693                         s390_lg (code, s390_r3, 0, cfg->frame_reg,
2694                                  S390_MINIMAL_STACK_SIZE+cfg->param_area);
2695                 }
2696                 break;
2697         case SAVE_NONE:
2698         default:
2699                 break;
2700         }
2701
2702         s390_basr (code, s390_r13, 0);
2703         s390_j    (code, 10);
2704         s390_llong(code, cfg->method);
2705         s390_llong(code, func);
2706         s390_lg   (code, s390_r2, 0, s390_r13, 4);
2707         s390_lg   (code, s390_r1, 0, s390_r13, 12);
2708         s390_basr (code, s390_r14, s390_r1);
2709
2710         switch (save_mode) {
2711         case SAVE_ONE:
2712                 s390_lg  (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2713                 break;
2714         case SAVE_R4:
2715         case SAVE_R8:
2716                 s390_ld  (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2717                 break;
2718         case SAVE_STRUCT:
2719                 s390_lg  (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2720                 break;
2721         case SAVE_NONE:
2722         default:
2723                 break;
2724         }
2725
2726         return code;
2727 }
2728
2729 /*========================= End of Function ========================*/
2730
2731 /*------------------------------------------------------------------*/
2732 /*                                                                  */
2733 /* Name         - mono_arch_peephole_pass_1                         */
2734 /*                                                                  */
2735 /* Function     - Form a peephole pass at the code looking for      */
2736 /*                simple optimizations.                             */
2737 /*                                                                  */
2738 /*------------------------------------------------------------------*/
2739
2740 void
2741 mono_arch_peephole_pass_1 (MonoCompile *cfg, MonoBasicBlock *bb)
2742 {
2743 }
2744
2745 /*========================= End of Function ========================*/
2746
2747 /*------------------------------------------------------------------*/
2748 /*                                                                  */
2749 /* Name         - mono_arch_peephole_pass_2                         */
2750 /*                                                                  */
2751 /* Function     - Form a peephole pass at the code looking for      */
2752 /*                simple optimizations.                             */
2753 /*                                                                  */
2754 /*------------------------------------------------------------------*/
2755
2756 void
2757 mono_arch_peephole_pass_2 (MonoCompile *cfg, MonoBasicBlock *bb)
2758 {
2759         MonoInst *ins, *n;
2760
2761         MONO_BB_FOR_EACH_INS_SAFE (bb, n, ins) {
2762                 mono_peephole_ins (bb, ins);
2763         }
2764 }
2765
2766 /*========================= End of Function ========================*/
2767
2768 /*------------------------------------------------------------------*/
2769 /*                                                                  */
2770 /* Name         - mono_arch_lowering_pass.                          */
2771 /*                                                                  */
2772 /*------------------------------------------------------------------*/
2773
2774 void
2775 mono_arch_lowering_pass (MonoCompile *cfg, MonoBasicBlock *bb)
2776 {
2777         MonoInst *ins, *next;
2778
2779         MONO_BB_FOR_EACH_INS_SAFE (bb, next, ins) {
2780                 switch (ins->opcode) {
2781                 case OP_DIV_IMM:
2782                 case OP_REM_IMM:
2783                 case OP_IDIV_IMM:
2784                 case OP_IREM_IMM:
2785                 case OP_IDIV_UN_IMM:
2786                 case OP_IREM_UN_IMM:
2787                 case OP_LAND_IMM:
2788                 case OP_LOR_IMM:
2789                 case OP_LXOR_IMM:
2790                 case OP_LOCALLOC_IMM:
2791                         mono_decompose_op_imm (cfg, bb, ins);
2792                         break;
2793                 case OP_LADD_IMM:
2794                         if (!s390_is_imm16 (ins->inst_imm))
2795                                 /* This is created by the memcpy code which ignores is_inst_imm */
2796                                 mono_decompose_op_imm (cfg, bb, ins);
2797                         break;
2798                 default:
2799                         break;
2800                 }
2801         }
2802
2803         bb->max_vreg = cfg->next_vreg;
2804 }
2805
2806 /*========================= End of Function ========================*/
2807
2808 /*------------------------------------------------------------------*/
2809 /*                                                                  */
2810 /* Name         - emit_float_to_int                                 */
2811 /*                                                                  */
2812 /* Function     - Create instructions which will convert a floating */
2813 /*                point value to integer.                           */
2814 /*                                                                  */
2815 /*------------------------------------------------------------------*/
2816
2817 static guchar*
2818 emit_float_to_int (MonoCompile *cfg, guchar *code, int dreg, int sreg, int size, gboolean is_signed)
2819 {
2820         /* sreg is a float, dreg is an integer reg. */
2821         if (is_signed) {
2822                 s390_cgdbr (code, dreg, 5, sreg);
2823                 switch (size) {
2824                         case 1:
2825                                 s390_lghi (code, s390_r0, 0);
2826                                 s390_lghi (code, s390_r13, 0xff);
2827                                 s390_ltgr (code, dreg, dreg);
2828                                 s390_jnl  (code, 4);
2829                                 s390_lghi (code, s390_r0, 0x80);
2830                                 s390_ngr  (code, dreg, s390_r13);
2831                                 s390_ogr  (code, dreg, s390_r0);
2832                                 break;
2833                 }
2834         } else {
2835                 short *o[1];
2836                 s390_basr   (code, s390_r13, 0);
2837                 s390_j      (code, 10);
2838                 s390_llong  (code, 0x41e0000000000000llu);
2839                 s390_llong  (code, 0x41f0000000000000llu);
2840                 s390_ldr    (code, s390_f15, sreg);
2841                 s390_cdb    (code, s390_f15, 0, s390_r13, 4);
2842                 s390_jl     (code, 0); CODEPTR (code, o[0]);
2843                 s390_sdb    (code, s390_f15, 0, s390_r13, 12);
2844                 s390_cfdbr  (code, dreg, 7, s390_f15);
2845                 s390_j      (code, 4);
2846                 PTRSLOT (code, o[0]);
2847                 s390_cfdbr  (code, dreg, 5, sreg);
2848                 switch (size) {
2849                         case 1:
2850                                 s390_lghi (code, s390_r0, 0xff);
2851                                 s390_ngr  (code, dreg, s390_r0);
2852                                 break;
2853                         case 2:
2854                                 s390_lghi (code, s390_r0, -1);
2855                                 s390_srlg (code, s390_r0, s390_r0, 0, 16);
2856                                 s390_ngr  (code, dreg, s390_r0);
2857                                 break;
2858                 }
2859         }
2860         return code;
2861 }
2862
2863 /*========================= End of Function ========================*/
2864
2865 /*------------------------------------------------------------------*/
2866 /*                                                                  */
2867 /* Name         - gboolean_is_unsigned.                             */
2868 /*                                                                  */
2869 /* Function     - Return TRUE if next opcode is checking for un-    */
2870 /*                signed value.                                     */
2871 /*                                                                  */
2872 /*------------------------------------------------------------------*/
2873
2874 static
2875 gboolean is_unsigned (MonoInst *next)
2876 {
2877         if ((next) &&
2878                 (((next->opcode >= OP_IBNE_UN) &&
2879                   (next->opcode <= OP_IBLT_UN)) ||
2880                  ((next->opcode >= OP_LBNE_UN) &&
2881                   (next->opcode <= OP_LBLT_UN)) ||
2882                  ((next->opcode >= OP_COND_EXC_NE_UN) &&
2883                   (next->opcode <= OP_COND_EXC_LT_UN)) ||
2884                  ((next->opcode >= OP_COND_EXC_INE_UN) &&
2885                   (next->opcode <= OP_COND_EXC_ILT_UN)) ||
2886                  ((next->opcode == OP_CLT_UN) ||
2887                   (next->opcode == OP_CGT_UN)) ||
2888                  ((next->opcode == OP_ICLT_UN) ||
2889                   (next->opcode == OP_ICGT_UN) ||
2890                   (next->opcode == OP_LCLT_UN) ||
2891                   (next->opcode == OP_LCGT_UN))))
2892                 return TRUE;
2893         else
2894                 return FALSE;
2895 }
2896
2897 /*========================= End of Function ========================*/
2898
2899 /*------------------------------------------------------------------*/
2900 /*                                                                  */
2901 /* Name         - mono_arch_output_basic_block                      */
2902 /*                                                                  */
2903 /* Function     - Perform the "real" work of emitting instructions  */
2904 /*                that will do the work of in the basic block.      */
2905 /*                                                                  */
2906 /*------------------------------------------------------------------*/
2907
2908 void
2909 mono_arch_output_basic_block (MonoCompile *cfg, MonoBasicBlock *bb)
2910 {
2911         MonoInst *ins;
2912         MonoCallInst *call;
2913         guint offset;
2914         guint8 *code = cfg->native_code + cfg->code_len;
2915         guint last_offset = 0;
2916         int max_len, cpos, src2;
2917
2918         /* we don't align basic blocks of loops on s390 */
2919
2920         if (cfg->verbose_level > 2)
2921                 g_print ("Basic block %d starting at offset 0x%x\n", bb->block_num, bb->native_offset);
2922
2923         cpos = bb->max_offset;
2924
2925         if (cfg->prof_options & MONO_PROFILE_COVERAGE) {
2926                 //MonoCoverageInfo *cov = mono_get_coverage_info (cfg->method);
2927                 //g_assert (!mono_compile_aot);
2928                 //cpos += 6;
2929                 //if (bb->cil_code)
2930                 //      cov->data [bb->dfn].iloffset = bb->cil_code - cfg->cil_code;
2931                 /* this is not thread save, but good enough */
2932                 /* fixme: howto handle overflows? */
2933                 //x86_inc_mem (code, &cov->data [bb->dfn].count);
2934         }
2935
2936         MONO_BB_FOR_EACH_INS (bb, ins) {
2937                 offset = code - cfg->native_code;
2938
2939                 max_len = ((guint8 *)ins_get_spec (ins->opcode))[MONO_INST_LEN];
2940
2941                 if (offset > (cfg->code_size - max_len - 16)) {
2942                         cfg->code_size *= 2;
2943                         cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
2944                         code = cfg->native_code + offset;
2945                 }
2946
2947                 mono_debug_record_line_number (cfg, ins, offset);
2948
2949                 switch (ins->opcode) {
2950                 case OP_STOREI1_MEMBASE_IMM: {
2951                         s390_lghi (code, s390_r0, ins->inst_imm);
2952                         S390_LONG (code, stcy, stc, s390_r0, 0,
2953                                    ins->inst_destbasereg, ins->inst_offset);
2954                 }
2955                         break;
2956                 case OP_STOREI2_MEMBASE_IMM: {
2957                         s390_lghi (code, s390_r0, ins->inst_imm);
2958                         S390_LONG (code, sthy, sth, s390_r0, 0,
2959                                    ins->inst_destbasereg, ins->inst_offset);
2960                 }
2961                         break;
2962                 case OP_STOREI4_MEMBASE_IMM: {
2963                         if (s390_is_imm16(ins->inst_imm)) {
2964                                 s390_lghi (code, s390_r0, ins->inst_imm);
2965                         } else {
2966                                 s390_basr (code, s390_r13, 0);
2967                                 s390_j    (code, 6);
2968                                 s390_llong(code, ins->inst_imm);
2969                                 s390_lg   (code, s390_r0, 0, s390_r13, 4);
2970                         }
2971                         S390_LONG (code, sty, st, s390_r0, 0,
2972                                    ins->inst_destbasereg, ins->inst_offset);
2973                 }
2974                         break;
2975                 case OP_STORE_MEMBASE_IMM:
2976                 case OP_STOREI8_MEMBASE_IMM: {
2977                         if (s390_is_imm16(ins->inst_imm)) {
2978                                 s390_lghi (code, s390_r0, ins->inst_imm);
2979                         } else {
2980                                 s390_basr (code, s390_r13, 0);
2981                                 s390_j    (code, 6);
2982                                 s390_llong(code, ins->inst_imm);
2983                                 s390_lg   (code, s390_r0, 0, s390_r13, 4);
2984                         }
2985                         S390_LONG (code, stg, stg, s390_r0, 0,
2986                                    ins->inst_destbasereg, ins->inst_offset);
2987                 }
2988                         break;
2989                 case OP_STOREI1_MEMBASE_REG: {
2990                         S390_LONG (code, stcy, stc, ins->sreg1, 0,
2991                                    ins->inst_destbasereg, ins->inst_offset);
2992                 }
2993                         break;
2994                 case OP_STOREI2_MEMBASE_REG: {
2995                         S390_LONG (code, sthy, sth, ins->sreg1, 0,
2996                                    ins->inst_destbasereg, ins->inst_offset);
2997                 }
2998                         break;
2999                 case OP_STOREI4_MEMBASE_REG: {
3000                         S390_LONG (code, sty, st, ins->sreg1, 0,
3001                                    ins->inst_destbasereg, ins->inst_offset);
3002                 }
3003                         break;
3004                 case OP_STORE_MEMBASE_REG:
3005                 case OP_STOREI8_MEMBASE_REG: {
3006                         S390_LONG (code, stg, stg, ins->sreg1, 0,
3007                                    ins->inst_destbasereg, ins->inst_offset);
3008                 }
3009                         break;
3010                 case OP_LOADU4_MEM:
3011                         g_assert_not_reached ();
3012                         break;
3013                 case OP_LOAD_MEMBASE:
3014                 case OP_LOADI8_MEMBASE: {
3015                         S390_LONG (code, lg, lg, ins->dreg, 0,
3016                                    ins->inst_basereg, ins->inst_offset);
3017                 }
3018                         break;
3019                 case OP_LOADI4_MEMBASE: {
3020                         S390_LONG (code, lgf, lgf, ins->dreg, 0,
3021                                    ins->inst_basereg, ins->inst_offset);
3022                 }
3023                         break;
3024                 case OP_LOADU4_MEMBASE: {
3025                         S390_LONG (code, llgf, llgf, ins->dreg, 0,
3026                                    ins->inst_basereg, ins->inst_offset);
3027                 }
3028                         break;
3029                 case OP_LOADU1_MEMBASE: {
3030                         S390_LONG (code, llgc, llgc, ins->dreg, 0,
3031                                    ins->inst_basereg, ins->inst_offset);
3032                 }
3033                         break;
3034                 case OP_LOADI1_MEMBASE: {
3035                         S390_LONG (code, lgb, lgb, ins->dreg, 0,
3036                                    ins->inst_basereg, ins->inst_offset);
3037                 }
3038                         break;
3039                 case OP_LOADU2_MEMBASE: {
3040                         S390_LONG (code, llgh, llgh, ins->dreg, 0,
3041                                    ins->inst_basereg, ins->inst_offset);
3042                 }
3043                         break;
3044                 case OP_LOADI2_MEMBASE: {
3045                         S390_LONG (code, lgh, lgh, ins->dreg, 0,
3046                                    ins->inst_basereg, ins->inst_offset);
3047                 }
3048                         break;
3049                 case OP_LCONV_TO_I1: {
3050 #if 0
3051                         s390_lgbr (code, ins->dreg, ins->sreg1);
3052 #else
3053                         s390_sllg (code, ins->dreg, ins->sreg1, 0, 56);
3054                         s390_srag (code, ins->dreg, ins->dreg, 0, 56);
3055 #endif
3056                 }
3057                         break;
3058                 case OP_LCONV_TO_I2: {
3059 #if 0
3060                         s390_lghr (code, ins->dreg, ins->sreg1);
3061 #else
3062                         s390_sllg (code, ins->dreg, ins->sreg1, 0, 48);
3063                         s390_srag (code, ins->dreg, ins->dreg, 0, 48);
3064 #endif
3065                 }
3066                         break;
3067                 case OP_LCONV_TO_U1: {
3068 #if 0
3069                         s390_llghr (code, ins->dreg, ins->sreg1);
3070 #else
3071                         if (ins->dreg != ins->sreg1)
3072                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3073                         s390_lghi  (code, s390_r0, 0xff);
3074                         s390_ngr   (code, ins->dreg, s390_r0);
3075 #endif
3076                 }
3077                         break;
3078                 case OP_LCONV_TO_U2: {
3079 #if 0
3080                         s390_llghr (code, ins->dreg, ins->sreg1);
3081 #else
3082                         if (ins->dreg != ins->sreg1)
3083                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3084                         s390_lghi  (code, s390_r0, -1);
3085                         s390_srlg  (code, s390_r0, s390_r0, 0, 48);
3086                         s390_ngr   (code, ins->dreg, s390_r0);
3087 #endif
3088                 }
3089                         break;
3090                 case OP_ICONV_TO_I1: {
3091 #if 0
3092                         s390_lbr  (code, ins->dreg, ins->sreg1);
3093 #else
3094                         if (ins->dreg != ins->sreg1)
3095                                 s390_lr  (code, ins->dreg, ins->sreg1);
3096                         s390_sll (code, ins->dreg, 0, 24);
3097                         s390_sra (code, ins->dreg, 0, 24);
3098
3099 #endif
3100                 }
3101                         break;
3102                 case OP_ICONV_TO_I2: {
3103 #if 0
3104                         s390_lhr  (code, ins->dreg, ins->sreg1);
3105 #else
3106                         if (ins->dreg != ins->sreg1)
3107                                 s390_lr  (code, ins->dreg, ins->sreg1);
3108                         s390_sll (code, ins->dreg, 0, 16);
3109                         s390_sra (code, ins->dreg, 0, 16);
3110 #endif
3111                 }
3112                         break;
3113                 case OP_ICONV_TO_U1: {
3114 #if 0
3115                         s390_llcr (code, ins->dreg, ins->sreg1);
3116 #else
3117                         if (ins->dreg != ins->sreg1)
3118                                 s390_lr  (code, ins->dreg, ins->sreg1);
3119                         s390_lhi  (code, s390_r0, 0xff);
3120                         s390_nr   (code, ins->dreg, s390_r0);
3121 #endif
3122                 }
3123                         break;
3124                 case OP_ICONV_TO_U2: {
3125 #if 0
3126                         s390_llhr (code, ins->dreg, ins->sreg1);
3127 #else
3128                         if (ins->dreg != ins->sreg1)
3129                                 s390_lr  (code, ins->dreg, ins->sreg1);
3130                         s390_lhi  (code, s390_r0, -1);
3131                         s390_srl  (code, s390_r0, 0, 16);
3132                         s390_nr   (code, ins->dreg, s390_r0);
3133 #endif
3134                 }
3135                         break;
3136                 case OP_COMPARE:
3137                 case OP_LCOMPARE: {
3138                         if (is_unsigned (ins->next))
3139                                 s390_clgr (code, ins->sreg1, ins->sreg2);
3140                         else
3141                                 s390_cgr  (code, ins->sreg1, ins->sreg2);
3142                 }
3143                         break;
3144                 case OP_ICOMPARE: {
3145                         if (is_unsigned (ins->next))
3146                                 s390_clr  (code, ins->sreg1, ins->sreg2);
3147                         else
3148                                 s390_cr   (code, ins->sreg1, ins->sreg2);
3149                 }
3150                         break;
3151                 case OP_COMPARE_IMM:
3152                 case OP_LCOMPARE_IMM: {
3153                         if (s390_is_imm16 (ins->inst_imm)) {
3154                                 s390_lghi (code, s390_r0, ins->inst_imm);
3155                                 if (is_unsigned (ins->next))
3156                                         s390_clgr (code, ins->sreg1, s390_r0);
3157                                 else
3158                                         s390_cgr  (code, ins->sreg1, s390_r0);
3159                         } else {
3160                                 s390_basr (code, s390_r13, 0);
3161                                 s390_j    (code, 6);
3162                                 s390_llong(code, ins->inst_imm);
3163                                 if (is_unsigned (ins->next))
3164                                         s390_clg  (code, ins->sreg1, 0, s390_r13, 4);
3165                                 else
3166                                         s390_cg   (code, ins->sreg1, 0, s390_r13, 4);
3167                         }
3168                 }
3169                         break;
3170                 case OP_ICOMPARE_IMM: {
3171                         if (s390_is_imm16 (ins->inst_imm)) {
3172                                 s390_lghi (code, s390_r0, ins->inst_imm);
3173                                 if (is_unsigned (ins->next))
3174                                         s390_clr  (code, ins->sreg1, s390_r0);
3175                                 else
3176                                         s390_cr   (code, ins->sreg1, s390_r0);
3177                         }
3178                         else {
3179                                 s390_basr (code, s390_r13, 0);
3180                                 s390_j    (code, 4);
3181                                 s390_word (code, ins->inst_imm);
3182                                 if (is_unsigned (ins->next))
3183                                         s390_cl  (code, ins->sreg1, 0, s390_r13, 4);
3184                                 else
3185                                         s390_c   (code, ins->sreg1, 0, s390_r13, 4);
3186                         }
3187                 }
3188                         break;
3189                 case OP_BREAK: {
3190                         s390_basr  (code, s390_r13, 0);
3191                         s390_j     (code, 6);
3192                         mono_add_patch_info (cfg, code - cfg->native_code, MONO_PATCH_INFO_ABS,
3193                                              mono_break);
3194                         s390_llong (code, mono_break);
3195                         s390_lg    (code, s390_r14, 0, s390_r13, 4);
3196                         s390_basr  (code, s390_r14, s390_r14);
3197                 }
3198                         break;
3199                 case OP_ADDCC: {
3200                         CHECK_SRCDST_COM;
3201                         s390_agr  (code, ins->dreg, src2);
3202                 }
3203                         break;
3204                 case OP_LADD: {
3205                         CHECK_SRCDST_COM;
3206                         s390_agr   (code, ins->dreg, src2);
3207                 }
3208                         break;
3209                 case OP_ADC: {
3210                         CHECK_SRCDST_COM;
3211                         s390_alcgr (code, ins->dreg, src2);
3212                 }
3213                         break;
3214                 case OP_ADD_IMM: {
3215                         if (ins->dreg != ins->sreg1) {
3216                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3217                         }
3218                         if (s390_is_imm16 (ins->inst_imm)) {
3219                                 s390_aghi (code, ins->dreg, ins->inst_imm);
3220                         } else {
3221                                 s390_basr (code, s390_r13, 0);
3222                                 s390_j    (code, 6);
3223                                 s390_llong(code, ins->inst_imm);
3224                                 s390_ag   (code, ins->dreg, 0, s390_r13, 4);
3225                         }
3226                 }
3227                         break;
3228                 case OP_LADD_IMM: {
3229                         if (ins->dreg != ins->sreg1) {
3230                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3231                         }
3232                         g_assert (s390_is_imm16 (ins->inst_imm));
3233                         s390_aghi (code, ins->dreg, ins->inst_imm);
3234                 }
3235                         break;
3236                 case OP_ADC_IMM: {
3237                         if (ins->dreg != ins->sreg1) {
3238                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3239                         }
3240                         if (s390_is_imm16 (ins->inst_imm)) {
3241                                 s390_lghi  (code, s390_r0, ins->inst_imm);
3242                                 s390_alcgr (code, ins->dreg, s390_r0);
3243                         } else {
3244                                 s390_basr  (code, s390_r13, 0);
3245                                 s390_j     (code, 6);
3246                                 s390_llong (code, ins->inst_imm);
3247                                 s390_lg    (code, s390_r13, 0, s390_r13, 4);
3248                                 s390_alcgr (code, ins->dreg, s390_r13);
3249                         }
3250                 }
3251                         break;
3252                 case OP_IADD_OVF:
3253                 case OP_S390_IADD_OVF: {
3254                         CHECK_SRCDST_COM;
3255                         s390_ar    (code, ins->dreg, src2);
3256                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3257                         s390_lgfr  (code, ins->dreg, ins->dreg);
3258                 }
3259                         break;
3260                 case OP_IADD_OVF_UN:
3261                 case OP_S390_IADD_OVF_UN: {
3262                         CHECK_SRCDST_COM;
3263                         s390_algr  (code, ins->dreg, src2);
3264                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
3265                         s390_llgfr (code, ins->dreg, ins->dreg);
3266                 }
3267                         break;
3268                 case OP_ADD_OVF_CARRY: {
3269                         CHECK_SRCDST_COM;
3270                         s390_lghi  (code, s390_r0, 0);
3271                         s390_lgr   (code, s390_r1, s390_r0);
3272                         s390_alcgr (code, s390_r0, s390_r1);
3273                         s390_agr   (code, ins->dreg, src2);
3274                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3275                         s390_agr   (code, ins->dreg, s390_r0);
3276                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3277                 }
3278                         break;
3279                 case OP_ADD_OVF_UN_CARRY: {
3280                         CHECK_SRCDST_COM;
3281                         s390_alcgr (code, ins->dreg, src2);
3282                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
3283                 }
3284                         break;
3285                 case OP_SUBCC: {
3286                         CHECK_SRCDST_NCOM;
3287                         s390_sgr (code, ins->dreg, src2);
3288                 }
3289                         break;
3290                 case OP_LSUB: {
3291                         CHECK_SRCDST_NCOM;
3292                         s390_sgr  (code, ins->dreg, src2);
3293                 }
3294                         break;
3295                 case OP_SBB: {
3296                         CHECK_SRCDST_NCOM;
3297                         s390_slbgr(code, ins->dreg, src2);
3298                 }
3299                         break;
3300                 case OP_SUB_IMM: {
3301                         if (ins->dreg != ins->sreg1) {
3302                                 s390_lgr   (code, ins->dreg, ins->sreg1);
3303                         }
3304                         if (s390_is_imm16 (-ins->inst_imm)) {
3305                                 s390_lghi  (code, s390_r0, ins->inst_imm);
3306                                 s390_slgr  (code, ins->dreg, s390_r0);
3307                         } else {
3308                                 s390_basr (code, s390_r13, 0);
3309                                 s390_j    (code, 6);
3310                                 s390_llong(code, ins->inst_imm);
3311                                 s390_slg  (code, ins->dreg, 0, s390_r13, 4);
3312                         }
3313                 }
3314                         break;
3315                 case OP_LSUB_IMM: {
3316                         if (ins->dreg != ins->sreg1) {
3317                                 s390_lgr   (code, ins->dreg, ins->sreg1);
3318                         }
3319                         if (s390_is_imm16 (-ins->inst_imm)) {
3320                                 s390_lghi  (code, s390_r0, ins->inst_imm);
3321                                 s390_slgr  (code, ins->dreg, s390_r0);
3322                         } else {
3323                                 s390_basr (code, s390_r13, 0);
3324                                 s390_j    (code, 6);
3325                                 s390_llong(code, ins->inst_imm);
3326                                 s390_slg  (code, ins->dreg, 0, s390_r13, 4);
3327                         }
3328                 }
3329                         break;
3330                 case OP_SBB_IMM: {
3331                         if (ins->dreg != ins->sreg1) {
3332                                 s390_lgr   (code, ins->dreg, ins->sreg1);
3333                         }
3334                         if (s390_is_imm16 (-ins->inst_imm)) {
3335                                 s390_lghi  (code, s390_r0, ins->inst_imm);
3336                                 s390_slbgr (code, ins->dreg, s390_r0);
3337                         } else {
3338                                 s390_basr (code, s390_r13, 0);
3339                                 s390_j    (code, 6);
3340                                 s390_llong(code, ins->inst_imm);
3341                                 s390_slbg (code, ins->dreg, 0, s390_r13, 4);
3342                         }
3343                 }
3344                         break;
3345                 case OP_SUB_OVF_CARRY: {
3346                         CHECK_SRCDST_NCOM;
3347                         s390_lghi  (code, s390_r0, 0);
3348                         s390_lgr   (code, s390_r1, s390_r0);
3349                         s390_slbgr (code, s390_r0, s390_r1);
3350                         s390_sgr   (code, ins->dreg, src2);
3351                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3352                         s390_agr   (code, ins->dreg, s390_r0);
3353                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3354                 }
3355                         break;
3356                 case OP_SUB_OVF_UN_CARRY: {
3357                         CHECK_SRCDST_NCOM;
3358                         s390_slbgr (code, ins->dreg, src2);
3359                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
3360                 }
3361                         break;
3362                 case OP_LAND: {
3363                         if (ins->sreg1 == ins->dreg) {
3364                                 s390_ngr  (code, ins->dreg, ins->sreg2);
3365                         }
3366                         else {
3367                                 if (ins->sreg2 == ins->dreg) {
3368                                         s390_ngr (code, ins->dreg, ins->sreg1);
3369                                 }
3370                                 else {
3371                                         s390_lgr (code, ins->dreg, ins->sreg1);
3372                                         s390_ngr (code, ins->dreg, ins->sreg2);
3373                                 }
3374                         }
3375                 }
3376                         break;
3377                 case OP_AND_IMM: {
3378                         if (ins->dreg != ins->sreg1) {
3379                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3380                         }
3381                         if (s390_is_imm16 (ins->inst_imm)) {
3382                                 s390_lghi  (code, s390_r0, ins->inst_imm);
3383                                 s390_ngr  (code, ins->dreg, s390_r0);
3384                         } else {
3385                                 s390_basr (code, s390_r13, 0);
3386                                 s390_j    (code, 6);
3387                                 s390_llong(code, ins->inst_imm);
3388                                 s390_ng   (code, ins->dreg, 0, s390_r13, 4);
3389                         }
3390                 }
3391                         break;
3392                 case OP_LDIV: {
3393                         s390_lgr  (code, s390_r1, ins->sreg1);
3394                         s390_dsgr (code, s390_r0, ins->sreg2);
3395                         s390_lgr  (code, ins->dreg, s390_r1);
3396                 }
3397                         break;
3398                 case OP_LDIV_UN: {
3399                         s390_lgr   (code, s390_r1, ins->sreg1);
3400                         s390_lghi  (code, s390_r0, 0);
3401                         s390_dlgr  (code, s390_r0, ins->sreg2);
3402                         s390_lgr   (code, ins->dreg, s390_r1);
3403                 }
3404                         break;
3405                 case OP_LREM: {
3406                         s390_lgr  (code, s390_r1, ins->sreg1);
3407                         s390_dsgr (code, s390_r0, ins->sreg2);
3408                         s390_lgr  (code, ins->dreg, s390_r0);
3409                         break;
3410                 }
3411                 case OP_LREM_UN: {
3412                         s390_lgr   (code, s390_r1, ins->sreg1);
3413                         s390_lghi  (code, s390_r0, 0);
3414                         s390_dlgr  (code, s390_r0, ins->sreg2);
3415                         s390_lgr   (code, ins->dreg, s390_r0);
3416                 }
3417                         break;
3418                 case OP_LOR: {
3419                         if (ins->sreg1 == ins->dreg) {
3420                                 s390_ogr  (code, ins->dreg, ins->sreg2);
3421                         }
3422                         else {
3423                                 if (ins->sreg2 == ins->dreg) {
3424                                         s390_ogr (code, ins->dreg, ins->sreg1);
3425                                 }
3426                                 else {
3427                                         s390_lgr (code, ins->dreg, ins->sreg1);
3428                                         s390_ogr (code, ins->dreg, ins->sreg2);
3429                                 }
3430                         }
3431                 }
3432                         break;
3433                 case OP_OR_IMM: {
3434                         if (ins->dreg != ins->sreg1) {
3435                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3436                         }
3437                         if (s390_is_imm16 (ins->inst_imm)) {
3438                                 s390_lghi (code, s390_r0, ins->inst_imm);
3439                                 s390_ogr  (code, ins->dreg, s390_r0);
3440                         } else {
3441                                 s390_basr (code, s390_r13, 0);
3442                                 s390_j    (code, 6);
3443                                 s390_llong(code, ins->inst_imm);
3444                                 s390_og   (code, ins->dreg, 0, s390_r13, 4);
3445                         }
3446                 }
3447                         break;
3448                 case OP_LXOR: {
3449                         if (ins->sreg1 == ins->dreg) {
3450                                 s390_xgr  (code, ins->dreg, ins->sreg2);
3451                         }
3452                         else {
3453                                 if (ins->sreg2 == ins->dreg) {
3454                                         s390_xgr (code, ins->dreg, ins->sreg1);
3455                                 }
3456                                 else {
3457                                         s390_lgr (code, ins->dreg, ins->sreg1);
3458                                         s390_xgr (code, ins->dreg, ins->sreg2);
3459                                 }
3460                         }
3461                 }
3462                         break;
3463                 case OP_XOR_IMM: {
3464                         if (ins->dreg != ins->sreg1) {
3465                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3466                         }
3467                         if (s390_is_imm16 (ins->inst_imm)) {
3468                                 s390_lghi  (code, s390_r0, ins->inst_imm);
3469                                 s390_xgr  (code, ins->dreg, s390_r0);
3470                         } else {
3471                                 s390_basr (code, s390_r13, 0);
3472                                 s390_j    (code, 6);
3473                                 s390_llong(code, ins->inst_imm);
3474                                 s390_xg   (code, ins->dreg, 0, s390_r13, 4);
3475                         }
3476                 }
3477                         break;
3478                 case OP_LSHL: {
3479                         CHECK_SRCDST_NCOM;
3480                         s390_sllg (code, ins->dreg, ins->dreg, src2, 0);
3481                 }
3482                         break;
3483                 case OP_SHL_IMM:
3484                 case OP_LSHL_IMM: {
3485                         if (ins->sreg1 != ins->dreg) {
3486                                 s390_lgr   (code, ins->dreg, ins->sreg1);
3487                         }
3488                         s390_sllg (code, ins->dreg, ins->dreg, 0, (ins->inst_imm & 0x3f));
3489                 }
3490                         break;
3491                 case OP_LSHR: {
3492                         CHECK_SRCDST_NCOM;
3493                         s390_srag  (code, ins->dreg, ins->dreg, src2, 0);
3494                 }
3495                         break;
3496                 case OP_SHR_IMM:
3497                 case OP_LSHR_IMM: {
3498                         if (ins->sreg1 != ins->dreg) {
3499                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3500                         }
3501                         s390_srag  (code, ins->dreg, ins->dreg, 0, (ins->inst_imm & 0x3f));
3502                 }
3503                         break;
3504                 case OP_SHR_UN_IMM:
3505                 case OP_LSHR_UN_IMM: {
3506                         if (ins->sreg1 != ins->dreg) {
3507                                 s390_lgr   (code, ins->dreg, ins->sreg1);
3508                         }
3509                         s390_srlg (code, ins->dreg, ins->dreg, 0, (ins->inst_imm & 0x3f));
3510                 }
3511                         break;
3512                 case OP_LSHR_UN: {
3513                         CHECK_SRCDST_NCOM;
3514                         s390_srlg (code, ins->dreg, ins->dreg, src2, 0);
3515                 }
3516                         break;
3517                 case OP_LNOT: {
3518                         if (ins->sreg1 != ins->dreg) {
3519                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3520                         }
3521                         s390_lghi (code, s390_r0, -1);
3522                         s390_xgr  (code, ins->dreg, s390_r0);
3523                 }
3524                         break;
3525                 case OP_LNEG: {
3526                         s390_lcgr (code, ins->dreg, ins->sreg1);
3527                 }
3528                         break;
3529                 case OP_LMUL: {
3530                         CHECK_SRCDST_COM;
3531                         s390_msgr (code, ins->dreg, src2);
3532                 }
3533                         break;
3534                 case OP_MUL_IMM:
3535                 case OP_LMUL_IMM: {
3536                         if (ins->dreg != ins->sreg1) {
3537                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3538                         }
3539                         if (s390_is_imm16 (ins->inst_imm)) {
3540                                 s390_lghi (code, s390_r13, ins->inst_imm);
3541                         } else {
3542                                 s390_basr (code, s390_r13, 0);
3543                                 s390_j    (code, 6);
3544                                 s390_llong(code, ins->inst_imm);
3545                                 s390_lg   (code, s390_r13, 0, s390_r13, 4);
3546                         }
3547                         s390_msgr (code, ins->dreg, s390_r13);
3548                 }
3549                         break;
3550                 case OP_LMUL_OVF: {
3551                         short int *o[2];
3552                         s390_ltgr (code, s390_r1, ins->sreg1);
3553                         s390_jz   (code, 0); CODEPTR(code, o[0]);
3554                         s390_ltgr (code, s390_r0, ins->sreg2);
3555                         s390_jnz  (code, 6);
3556                         s390_lghi (code, s390_r1, 0);
3557                         s390_j    (code, 0); CODEPTR(code, o[1]);
3558                         s390_xgr  (code, s390_r0, s390_r1);
3559                         s390_msgr (code, s390_r1, ins->sreg2);
3560                         s390_xgr  (code, s390_r0, s390_r1);
3561                         s390_srlg (code, s390_r0, s390_r0, 0, 63);
3562                         s390_ltgr (code, s390_r0, s390_r0);
3563                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3564                         PTRSLOT   (code, o[0]);
3565                         PTRSLOT   (code, o[1]);
3566                         s390_lgr  (code, ins->dreg, s390_r1);
3567                 }
3568                         break;
3569                 case OP_LMUL_OVF_UN: {
3570                         s390_lghi  (code, s390_r0, 0);
3571                         s390_lgr   (code, s390_r1, ins->sreg1);
3572                         s390_mlgr  (code, s390_r0, ins->sreg2);
3573                         s390_ltgr  (code, s390_r0, s390_r0);
3574                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3575                         s390_lgr   (code, ins->dreg, s390_r1);
3576                 }
3577                         break;
3578                 case OP_IADDCC: {
3579                         g_assert_not_reached ();
3580                         CHECK_SRCDST_COM_I;
3581                         s390_algr (code, ins->dreg, src2);
3582                 }
3583                         break;
3584                 case OP_IADD: {
3585                         CHECK_SRCDST_COM_I;
3586                         s390_agr  (code, ins->dreg, src2);
3587                 }
3588                         break;
3589                 case OP_IADC: {
3590                         g_assert_not_reached ();
3591                         CHECK_SRCDST_COM_I;
3592                         s390_alcgr (code, ins->dreg, src2);
3593                 }
3594                         break;
3595                 case OP_IADD_IMM: {
3596                         if (ins->dreg != ins->sreg1) {
3597                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3598                         }
3599                         if (s390_is_imm16 (ins->inst_imm)) {
3600                                 s390_aghi(code, ins->dreg, ins->inst_imm);
3601                         } else {
3602                                 s390_basr (code, s390_r13, 0);
3603                                 s390_j    (code, 4);
3604                                 s390_word (code, ins->inst_imm);
3605                                 s390_agf  (code, ins->dreg, 0, s390_r13, 4);
3606                         }
3607                 }
3608                         break;
3609                 case OP_IADC_IMM: {
3610                         if (ins->dreg != ins->sreg1) {
3611                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3612                         }
3613                         if (s390_is_imm16 (ins->inst_imm)) {
3614                                 s390_lghi  (code, s390_r0, ins->inst_imm);
3615                                 s390_alcgr (code, ins->dreg, s390_r0);
3616                         } else {
3617                                 s390_basr  (code, s390_r13, 0);
3618                                 s390_j     (code, 4);
3619                                 s390_word  (code, ins->inst_imm);
3620                                 s390_lgf   (code, s390_r13, 0, s390_r13, 4);
3621                                 s390_alcgr (code, ins->dreg, s390_r13);
3622                         }
3623                 }
3624                         break;
3625                 case OP_LADD_OVF:
3626                 case OP_S390_LADD_OVF: {
3627                         CHECK_SRCDST_COM;
3628                         s390_agr    (code, ins->dreg, src2);
3629                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3630                 }
3631                         break;
3632                 case OP_LADD_OVF_UN:
3633                 case OP_S390_LADD_OVF_UN: {
3634                         CHECK_SRCDST_COM;
3635                         s390_algr  (code, ins->dreg, src2);
3636                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
3637                 }
3638                         break;
3639                 case OP_ISUBCC: {
3640                         CHECK_SRCDST_NCOM_I;
3641                         s390_slgr (code, ins->dreg, src2);
3642                 }
3643                         break;
3644                 case OP_ISUB: {
3645                         CHECK_SRCDST_NCOM_I;
3646                         s390_sgr  (code, ins->dreg, src2);
3647                 }
3648                         break;
3649                 case OP_ISBB: {
3650                         CHECK_SRCDST_NCOM_I;
3651                         s390_slbgr (code, ins->dreg, src2);
3652                 }
3653                         break;
3654                 case OP_ISUB_IMM: {
3655                         if (ins->dreg != ins->sreg1) {
3656                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3657                         }
3658                         if (s390_is_imm16 (-ins->inst_imm)) {
3659                                 s390_aghi (code, ins->dreg, -ins->inst_imm);
3660                         } else {
3661                                 s390_basr (code, s390_r13, 0);
3662                                 s390_j    (code, 4);
3663                                 s390_word (code, ins->inst_imm);
3664                                 s390_sgf  (code, ins->dreg, 0, s390_r13, 4);
3665                         }
3666                 }
3667                         break;
3668                 case OP_ISBB_IMM: {
3669                         s390_basr (code, s390_r13, 0);
3670                         s390_j    (code, 4);
3671                         s390_word (code, ins->inst_imm);
3672                         s390_slgf (code, ins->dreg, 0, s390_r13, 4);
3673                 }
3674                         break;
3675                 case OP_ISUB_OVF:
3676                 case OP_S390_ISUB_OVF: {
3677                         CHECK_SRCDST_NCOM;
3678                         s390_sr   (code, ins->dreg, src2);
3679                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3680                         s390_lgfr (code, ins->dreg, ins->dreg);
3681                 }
3682                         break;
3683                 case OP_ISUB_OVF_UN:
3684                 case OP_S390_ISUB_OVF_UN: {
3685                         CHECK_SRCDST_NCOM;
3686                         s390_slr  (code, ins->dreg, src2);
3687                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
3688                         s390_llgfr(code, ins->dreg, ins->dreg);
3689                 }
3690                         break;
3691                 case OP_LSUB_OVF:
3692                 case OP_S390_LSUB_OVF: {
3693                         CHECK_SRCDST_NCOM;
3694                         s390_sgr   (code, ins->dreg, src2);
3695                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3696                 }
3697                         break;
3698                 case OP_LSUB_OVF_UN:
3699                 case OP_S390_LSUB_OVF_UN: {
3700                         CHECK_SRCDST_NCOM;
3701                         s390_slgr  (code, ins->dreg, src2);
3702                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
3703                 }
3704                         break;
3705                 case OP_IAND: {
3706                         CHECK_SRCDST_NCOM_I;
3707                         s390_ngr (code, ins->dreg, src2);
3708                 }
3709                         break;
3710                 case OP_IAND_IMM: {
3711                         if (ins->dreg != ins->sreg1) {
3712                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3713                         }
3714                         if (s390_is_imm16 (ins->inst_imm)) {
3715                                 s390_lghi (code, s390_r0, ins->inst_imm);
3716                                 s390_ngr  (code, ins->dreg, s390_r0);
3717                         } else {
3718                                 s390_basr (code, s390_r13, 0);
3719                                 s390_j    (code, 6);
3720                                 s390_llong(code, ins->inst_imm);
3721                                 s390_ng   (code, ins->dreg, 0, s390_r13, 4);
3722                         }
3723                 }
3724                         break;
3725                 case OP_IDIV: {
3726                         s390_lgfr (code, s390_r0, ins->sreg1);
3727                         s390_srda (code, s390_r0, 0, 32);
3728                         s390_dr   (code, s390_r0, ins->sreg2);
3729                         s390_lgfr (code, ins->dreg, s390_r1);
3730                 }
3731                         break;
3732                 case OP_IDIV_UN: {
3733                         s390_lgfr (code, s390_r0, ins->sreg1);
3734                         s390_srdl (code, s390_r0, 0, 32);
3735                         s390_dlr  (code, s390_r0, ins->sreg2);
3736                         s390_lgfr (code, ins->dreg, s390_r1);
3737                 }
3738                         break;
3739                 case OP_IDIV_IMM: {
3740                         if (s390_is_imm16 (ins->inst_imm)) {
3741                                 s390_lghi (code, s390_r13, ins->inst_imm);
3742                                 s390_lgfr (code, s390_r0, ins->sreg1);
3743                         } else {
3744                                 s390_basr (code, s390_r13, 0);
3745                                 s390_j    (code, 4);
3746                                 s390_word (code, ins->inst_imm);
3747                                 s390_lgfr (code, s390_r0, ins->sreg1);
3748                                 s390_lgf  (code, s390_r13, 0, s390_r13, 4);
3749                         }
3750                         s390_srda (code, s390_r0, 0, 32);
3751                         s390_dr   (code, s390_r0, ins->sreg2);
3752                         s390_lgfr (code, ins->dreg, s390_r1);
3753                 }
3754                         break;
3755                 case OP_IREM: {
3756                         s390_lgfr (code, s390_r0, ins->sreg1);
3757                         s390_srda (code, s390_r0, 0, 32);
3758                         s390_dr   (code, s390_r0, ins->sreg2);
3759                         s390_lgfr (code, ins->dreg, s390_r0);
3760                         break;
3761                 case OP_IREM_UN:
3762                         s390_lgfr (code, s390_r0, ins->sreg1);
3763                         s390_srdl (code, s390_r0, 0, 32);
3764                         s390_dlr  (code, s390_r0, ins->sreg2);
3765                         s390_lgfr (code, ins->dreg, s390_r0);
3766                 }
3767                         break;
3768                 case OP_IREM_IMM: {
3769                         if (s390_is_imm16 (ins->inst_imm)) {
3770                                 s390_lghi (code, s390_r13, ins->inst_imm);
3771                                 s390_lgfr (code, s390_r0, ins->sreg1);
3772                         } else {
3773                                 s390_basr (code, s390_r13, 0);
3774                                 s390_j    (code, 4);
3775                                 s390_word (code, ins->inst_imm);
3776                                 s390_lgfr (code, s390_r0, ins->sreg1);
3777                                 s390_lgf  (code, s390_r13, 0, s390_r13, 4);
3778                         }
3779                         s390_srda (code, s390_r0, 0, 32);
3780                         s390_dr   (code, s390_r0, ins->sreg2);
3781                         s390_lgfr (code, ins->dreg, s390_r0);
3782                 }
3783                         break;
3784                 case OP_IOR: {
3785                         CHECK_SRCDST_COM_I;
3786                         s390_ogr (code, ins->dreg, src2);
3787                 }
3788                         break;
3789                 case OP_IOR_IMM: {
3790                         if (ins->dreg != ins->sreg1) {
3791                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3792                         }
3793                         if (s390_is_imm16 (ins->inst_imm)) {
3794                                 s390_lghi (code, s390_r0, ins->inst_imm);
3795                                 s390_ogr  (code, ins->dreg, s390_r0);
3796                         } else {
3797                                 s390_basr (code, s390_r13, 0);
3798                                 s390_j    (code, 6);
3799                                 s390_llong(code, ins->inst_imm);
3800                                 s390_og   (code, ins->dreg, 0, s390_r13, 4);
3801                         }
3802                 }
3803                         break;
3804                 case OP_IXOR: {
3805                         CHECK_SRCDST_COM_I;
3806                         s390_xgr (code, ins->dreg, src2);
3807                 }
3808                         break;
3809                 case OP_IXOR_IMM: {
3810                         if (ins->dreg != ins->sreg1) {
3811                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3812                         }
3813                         if (s390_is_imm16 (ins->inst_imm)) {
3814                                 s390_lghi (code, s390_r0, ins->inst_imm);
3815                                 s390_xgr  (code, ins->dreg, s390_r0);
3816                         } else {
3817                                 s390_basr (code, s390_r13, 0);
3818                                 s390_j    (code, 6);
3819                                 s390_llong(code, ins->inst_imm);
3820                                 s390_xg   (code, ins->dreg, 0, s390_r13, 4);
3821                         }
3822                 }
3823                         break;
3824                 case OP_ISHL: {
3825                         CHECK_SRCDST_NCOM;
3826                         s390_sll  (code, ins->dreg, src2, 0);
3827                 }
3828                         break;
3829                 case OP_ISHL_IMM: {
3830                         if (ins->sreg1 != ins->dreg) {
3831                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3832                         }
3833                         s390_sll (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3834                 }
3835                         break;
3836                 case OP_ISHR: {
3837                         CHECK_SRCDST_NCOM;
3838                         s390_sra (code, ins->dreg, src2, 0);
3839                 }
3840                         break;
3841                 case OP_ISHR_IMM: {
3842                         if (ins->sreg1 != ins->dreg) {
3843                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3844                         }
3845                         s390_sra (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3846                 }
3847                         break;
3848                 case OP_ISHR_UN_IMM: {
3849                         if (ins->sreg1 != ins->dreg) {
3850                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3851                         }
3852                         s390_srl (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3853                 }
3854                         break;
3855                 case OP_ISHR_UN: {
3856                         CHECK_SRCDST_NCOM;
3857                         s390_srl  (code, ins->dreg, src2, 0);
3858                 }
3859                         break;
3860                 case OP_INOT: {
3861                         if (ins->sreg1 != ins->dreg) {
3862                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3863                         }
3864                         s390_lghi (code, s390_r0, -1);
3865                         s390_xgr  (code, ins->dreg, s390_r0);
3866                 }
3867                         break;
3868                 case OP_INEG: {
3869                         s390_lcgr (code, ins->dreg, ins->sreg1);
3870                 }
3871                         break;
3872                 case OP_IMUL: {
3873                         CHECK_SRCDST_COM_I;
3874                         s390_msr (code, ins->dreg, src2);
3875                 }
3876                         break;
3877                 case OP_IMUL_IMM: {
3878                         if (ins->dreg != ins->sreg1) {
3879                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3880                         }
3881                         if (s390_is_imm16 (ins->inst_imm)) {
3882                                 s390_lghi (code, s390_r13, ins->inst_imm);
3883                         } else {
3884                                 s390_basr (code, s390_r13, 0);
3885                                 s390_j    (code, 4);
3886                                 s390_word (code, ins->inst_imm);
3887                                 s390_lgf  (code, s390_r13, 0, s390_r13, 4);
3888                         }
3889                         s390_msr  (code, ins->dreg, s390_r13);
3890                 }
3891                         break;
3892                 case OP_IMUL_OVF: {
3893                         short int *o[2];
3894                         s390_ltr  (code, s390_r1, ins->sreg1);
3895                         s390_jz   (code, 0); CODEPTR(code, o[0]);
3896                         s390_ltr  (code, s390_r0, ins->sreg2);
3897                         s390_jnz  (code, 6);
3898                         s390_lhi  (code, s390_r1, 0);
3899                         s390_j    (code, 0); CODEPTR(code, o[1]);
3900                         s390_xr   (code, s390_r0, s390_r1);
3901                         s390_msr  (code, s390_r1, ins->sreg2);
3902                         s390_xr   (code, s390_r0, s390_r1);
3903                         s390_srl  (code, s390_r0, 0, 31);
3904                         s390_ltr  (code, s390_r0, s390_r0);
3905                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3906                         PTRSLOT   (code, o[0]);
3907                         PTRSLOT   (code, o[1]);
3908                         s390_lgfr (code, ins->dreg, s390_r1);
3909                 }
3910                         break;
3911                 case OP_IMUL_OVF_UN: {
3912                         s390_lhi  (code, s390_r0, 0);
3913                         s390_lr   (code, s390_r1, ins->sreg1);
3914                         s390_mlr  (code, s390_r0, ins->sreg2);
3915                         s390_ltr  (code, s390_r0, s390_r0);
3916                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3917                         s390_lgfr (code, ins->dreg, s390_r1);
3918                 }
3919                         break;
3920                 case OP_ICONST:
3921                 case OP_I8CONST: {
3922                         if (s390_is_imm16(ins->inst_c0)) {
3923                                 s390_lghi (code, ins->dreg, ins->inst_c0);
3924                         } else {
3925                                 s390_basr (code, s390_r13, 0);
3926                                 s390_j    (code, 6);
3927                                 s390_llong(code, ins->inst_c0);
3928                                 s390_lg   (code, ins->dreg, 0, s390_r13, 4);
3929                         }
3930                 }
3931                         break;
3932                 case OP_AOTCONST: {
3933                         s390_basr (code, s390_r13, 0);
3934                         s390_j    (code, 6);
3935                         mono_add_patch_info (cfg, code - cfg->native_code,
3936                                 (MonoJumpInfoType)ins->inst_i1, ins->inst_p0);
3937                         s390_llong(code, 0);
3938                         s390_lg   (code,ins->dreg, 0, s390_r13, 4);
3939                 }
3940                         break;
3941                 case OP_JUMP_TABLE: {
3942                         mono_add_patch_info (cfg, code - cfg->native_code,
3943                                 (MonoJumpInfoType)ins->inst_i1, ins->inst_p0);
3944                         s390_basr  (code, s390_r13, 0);
3945                         s390_j     (code, 6);
3946                         s390_llong (code, 0);
3947                         s390_lg    (code, ins->dreg, 0, s390_r13, 4);
3948                 }
3949                         break;
3950                 case OP_MOVE:
3951                         if (ins->dreg != ins->sreg1) {
3952                                 s390_lgr (code, ins->dreg, ins->sreg1);
3953                         }
3954                         break;
3955                 case OP_LCONV_TO_I:
3956                 case OP_LCONV_TO_I8:
3957                 case OP_SEXT_I4:
3958                         s390_lgfr (code, ins->dreg, ins->sreg1);
3959                         break;
3960                 case OP_LCONV_TO_I4:
3961                         s390_lgfr (code, ins->dreg, ins->sreg1);
3962                         break;
3963                 case OP_LCONV_TO_U:
3964                 case OP_LCONV_TO_U8:
3965                 case OP_LCONV_TO_U4:
3966                 case OP_ZEXT_I4:
3967                         s390_llgfr (code, ins->dreg, ins->sreg1);
3968                         break;
3969                 case OP_LCONV_TO_OVF_U4:
3970                         s390_basr (code, s390_r13, 0);
3971                         s390_j    (code, 6);
3972                         s390_llong(code, 4294967295);
3973                         s390_clg  (code, ins->sreg1, 0, s390_r13, 4);
3974                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GT, "OverflowException");
3975                         s390_ltgr (code, ins->sreg1, ins->sreg1);
3976                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, "OverflowException");
3977                         s390_llgfr(code, ins->dreg, ins->sreg1);
3978                         break;
3979                 case OP_LCONV_TO_OVF_I4_UN:
3980                         s390_basr (code, s390_r13, 0);
3981                         s390_j    (code, 6);
3982                         s390_llong(code, 2147483647);
3983                         s390_cg   (code, ins->sreg1, 0, s390_r13, 4);
3984                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GT, "OverflowException");
3985                         s390_ltgr (code, ins->sreg1, ins->sreg1);
3986                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, "OverflowException");
3987                         s390_lgfr (code, ins->dreg, ins->sreg1);
3988                         break;
3989                 case OP_FMOVE:
3990                 case OP_FCONV_TO_R4: {
3991                         if (ins->dreg != ins->sreg1) {
3992                                 s390_ldr   (code, ins->dreg, ins->sreg1);
3993                         }
3994                 }
3995                         break;
3996                 case OP_S390_SETF4RET: {
3997                         s390_ledbr (code, ins->dreg, ins->sreg1);
3998                 }
3999                         break;
4000                 case OP_JMP: {
4001                         if (cfg->method->save_lmf)
4002                                 restoreLMF(code, cfg->frame_reg, cfg->stack_usage);
4003
4004                         if (cfg->flags & MONO_CFG_HAS_TAIL) {
4005                                 code =  emit_load_volatile_arguments (code, cfg);
4006                         }
4007
4008                         code = backUpStackPtr(cfg, code);
4009                         s390_lg  (code, s390_r14, 0, cfg->frame_reg, S390_RET_ADDR_OFFSET);
4010                         mono_add_patch_info (cfg, code - cfg->native_code,
4011                                              MONO_PATCH_INFO_METHOD_JUMP,
4012                                              ins->inst_p0);
4013                         s390_jcl (code, S390_CC_UN, 0);
4014                 }
4015                         break;
4016                 case OP_CHECK_THIS: {
4017                         /* ensure ins->sreg1 is not NULL */
4018                         s390_lg   (code, s390_r0, 0, ins->sreg1, 0);
4019                         s390_ltgr (code, s390_r0, s390_r0);
4020                 }
4021                         break;
4022                 case OP_ARGLIST: {
4023                         int offset = cfg->sig_cookie + cfg->stack_usage;
4024
4025                         if (s390_is_imm16 (offset))
4026                                 s390_lghi (code, s390_r0, offset);
4027                         else {
4028                                 s390_basr (code, s390_r13, 0);
4029                                 s390_j    (code, 6);
4030                                 s390_llong(code, offset);
4031                                 s390_lg   (code, s390_r0, 0, s390_r13, 0);
4032                         }
4033                         s390_agr  (code, s390_r0, cfg->frame_reg);
4034                         s390_stg  (code, s390_r0, 0, ins->sreg1, 0);
4035                 }
4036                         break;
4037                 case OP_FCALL: {
4038                         s390_basr (code, s390_r13, 0);
4039                         s390_j    (code, 6);
4040                         call = (MonoCallInst*)ins;
4041                         if (ins->flags & MONO_INST_HAS_METHOD)
4042                                 mono_add_patch_info (cfg, code-cfg->native_code,
4043                                                      MONO_PATCH_INFO_METHOD,
4044                                                      call->method);
4045                         else
4046                                 mono_add_patch_info (cfg, code-cfg->native_code,
4047                                                      MONO_PATCH_INFO_ABS,
4048                                                      call->fptr);
4049                         s390_llong(code, 0);
4050                         s390_lg   (code, s390_r14, 0, s390_r13, 4);
4051                         s390_basr (code, s390_r14, s390_r14);
4052                         if (call->signature->ret->type == MONO_TYPE_R4)
4053                                 s390_ldebr (code, s390_f0, s390_f0);
4054                 }
4055                         break;
4056                 case OP_LCALL:
4057                 case OP_VCALL:
4058                 case OP_VCALL2:
4059                 case OP_VOIDCALL:
4060                 case OP_CALL: {
4061                         s390_basr (code, s390_r13, 0);
4062                         s390_j    (code, 6);
4063                         call = (MonoCallInst*)ins;
4064                         if (ins->flags & MONO_INST_HAS_METHOD)
4065                                 mono_add_patch_info (cfg, code-cfg->native_code,
4066                                                      MONO_PATCH_INFO_METHOD,
4067                                                      call->method);
4068                         else
4069                                 mono_add_patch_info (cfg, code-cfg->native_code,
4070                                                      MONO_PATCH_INFO_ABS,
4071                                                      call->fptr);
4072                         s390_llong(code, 0);
4073                         s390_lg   (code, s390_r14, 0, s390_r13, 4);
4074                         s390_basr (code, s390_r14, s390_r14);
4075                 }
4076                         break;
4077                 case OP_FCALL_REG: {
4078                         call = (MonoCallInst*)ins;
4079                         s390_lgr  (code, s390_r1, ins->sreg1);
4080                         s390_basr (code, s390_r14, s390_r1);
4081                         if (call->signature->ret->type == MONO_TYPE_R4)
4082                                 s390_ldebr (code, s390_f0, s390_f0);
4083                 }
4084                         break;
4085                 case OP_LCALL_REG:
4086                 case OP_VCALL_REG:
4087                 case OP_VCALL2_REG:
4088                 case OP_VOIDCALL_REG:
4089                 case OP_CALL_REG: {
4090                         s390_lgr  (code, s390_r1, ins->sreg1);
4091                         s390_basr (code, s390_r14, s390_r1);
4092                 }
4093                         break;
4094                 case OP_FCALL_MEMBASE: {
4095                         call = (MonoCallInst*)ins;
4096                         s390_lg   (code, s390_r1, 0, ins->sreg1, ins->inst_offset);
4097                         s390_basr (code, s390_r14, s390_r1);
4098                         if (call->signature->ret->type == MONO_TYPE_R4)
4099                                 s390_ldebr (code, s390_f0, s390_f0);
4100                 }
4101                         break;
4102                 case OP_LCALL_MEMBASE:
4103                 case OP_VCALL_MEMBASE:
4104                 case OP_VCALL2_MEMBASE:
4105                 case OP_VOIDCALL_MEMBASE:
4106                 case OP_CALL_MEMBASE: {
4107                         s390_lg   (code, s390_r1, 0, ins->sreg1, ins->inst_offset);
4108                         s390_basr (code, s390_r14, s390_r1);
4109                 }
4110                         break;
4111                 case OP_LOCALLOC: {
4112                         int alloca_skip;
4113                         int area_offset;
4114
4115                         if (cfg->param_area == 0)
4116                                 alloca_skip = S390_MINIMAL_STACK_SIZE;
4117                         else
4118                                 alloca_skip = cfg->param_area;
4119
4120                         area_offset = S390_ALIGN(alloca_skip, S390_STACK_ALIGNMENT);
4121                         s390_lgr  (code, s390_r1, ins->sreg1);
4122                         if (ins->flags & MONO_INST_INIT)
4123                                 s390_lgr  (code, s390_r0, ins->sreg1);
4124                         s390_aghi (code, s390_r1, 14);
4125                         s390_srlg (code, s390_r1, s390_r1, 0, 3);
4126                         s390_sllg (code, s390_r1, s390_r1, 0, 3);
4127                         if (cfg->method->save_lmf) {
4128                                 /*----------------------------------*/
4129                                 /* we have to adjust lmf ebp value  */
4130                                 /*----------------------------------*/
4131                                 int lmfOffset = cfg->stack_usage - sizeof(MonoLMF);
4132
4133                                 s390_lgr (code, s390_r13, cfg->frame_reg);
4134                                 if (s390_is_imm16(lmfOffset))
4135                                         s390_aghi (code, s390_r13, lmfOffset);
4136                                 else {
4137                                         s390_basr (code, s390_r14, 0);
4138                                         s390_j    (code, 4);
4139                                         s390_word (code, lmfOffset);
4140                                         s390_agf  (code, s390_r13, 0, s390_r14, 4);
4141                                 }
4142                                 s390_lgr (code, s390_r14, STK_BASE);
4143                                 s390_sgr (code, s390_r14, s390_r1);
4144                                 s390_stg (code, s390_r14, 0, s390_r13,
4145                                           G_STRUCT_OFFSET(MonoLMF, ebp));
4146                         }
4147                         s390_lg   (code, s390_r13, 0, STK_BASE, 0);
4148                         s390_sgr  (code, STK_BASE, s390_r1);
4149                         s390_stg  (code, s390_r13, 0, STK_BASE, 0);
4150                         s390_la   (code, ins->dreg, 0, STK_BASE, area_offset);
4151                         s390_srlg (code, ins->dreg, ins->dreg, 0, 3);
4152                         s390_sllg (code, ins->dreg, ins->dreg, 0, 3);
4153                         if (ins->flags & MONO_INST_INIT) {
4154                                 s390_lgr  (code, s390_r1, s390_r0);
4155                                 s390_lgr  (code, s390_r0, ins->dreg);
4156                                 s390_lgr  (code, s390_r14, s390_r12);
4157                                 s390_lghi (code, s390_r13, 0);
4158                                 s390_mvcle(code, s390_r0, s390_r12, 0, 0);
4159                                 s390_jo   (code, -2);
4160                                 s390_lgr  (code, s390_r12, s390_r14);
4161                         }
4162                 }
4163                         break;
4164                 case OP_THROW: {
4165                         s390_lgr  (code, s390_r2, ins->sreg1);
4166                         s390_basr (code, s390_r13, 0);
4167                         s390_j    (code, 6);
4168                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD,
4169                                              (gpointer) "mono_arch_throw_exception");
4170                         s390_llong(code, 0);
4171                         s390_lg   (code, s390_r14, 0, s390_r13, 4);
4172                         s390_basr (code, s390_r14, s390_r14);
4173                 }
4174                         break;
4175                 case OP_RETHROW: {
4176                         s390_lgr  (code, s390_r2, ins->sreg1);
4177                         s390_basr (code, s390_r13, 0);
4178                         s390_j    (code, 6);
4179                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD,
4180                                              (gpointer) "mono_arch_rethrow_exception");
4181                         s390_llong(code, 0);
4182                         s390_lg   (code, s390_r14, 0, s390_r13, 4);
4183                         s390_basr (code, s390_r14, s390_r14);
4184                 }
4185                         break;
4186                 case OP_START_HANDLER: {
4187                         MonoInst *spvar = mono_find_spvar_for_region (cfg, bb->region);
4188
4189                         S390_LONG (code, stg, stg, s390_r14, 0,
4190                                    spvar->inst_basereg,
4191                                    spvar->inst_offset);
4192                 }
4193                         break;
4194                 case OP_ENDFILTER: {
4195                         MonoInst *spvar = mono_find_spvar_for_region (cfg, bb->region);
4196
4197                         if (ins->sreg1 != s390_r2)
4198                                 s390_lgr(code, s390_r2, ins->sreg1);
4199                         S390_LONG (code, lg, lg, s390_r14, 0,
4200                                    spvar->inst_basereg,
4201                                    spvar->inst_offset);
4202                         s390_br  (code, s390_r14);
4203                 }
4204                         break;
4205                 case OP_ENDFINALLY: {
4206                         MonoInst *spvar = mono_find_spvar_for_region (cfg, bb->region);
4207
4208                         S390_LONG (code, lg, lg, s390_r14, 0,
4209                                    spvar->inst_basereg,
4210                                    spvar->inst_offset);
4211                         s390_br  (code, s390_r14);
4212                 }
4213                         break;
4214                 case OP_CALL_HANDLER: {
4215                         mono_add_patch_info (cfg, code-cfg->native_code,
4216                                              MONO_PATCH_INFO_BB, ins->inst_target_bb);
4217                         s390_brasl (code, s390_r14, 0);
4218                         mono_cfg_add_try_hole (cfg, ins->inst_eh_block, code, bb);
4219                 }
4220                         break;
4221                 case OP_LABEL: {
4222                         ins->inst_c0 = code - cfg->native_code;
4223                 }
4224                         break;
4225                 case OP_RELAXED_NOP:
4226                 case OP_NOP:
4227                 case OP_DUMMY_USE:
4228                 case OP_DUMMY_STORE:
4229                 case OP_NOT_REACHED:
4230                 case OP_NOT_NULL: {
4231                 }
4232                         break;
4233                 case OP_SEQ_POINT: {
4234                         int i;
4235
4236                         if (cfg->compile_aot)
4237                                 NOT_IMPLEMENTED;
4238
4239                         /*
4240                          * Read from the single stepping trigger page. This will cause a
4241                          * SIGSEGV when single stepping is enabled.
4242                          * We do this _before_ the breakpoint, so single stepping after
4243                          * a breakpoint is hit will step to the next IL offset.
4244                          */
4245                         if (ins->flags & MONO_INST_SINGLE_STEP_LOC) {
4246                                 breakpointCode.pTrigger = ss_trigger_page;
4247                                 memcpy(code, (void *) &breakpointCode, BREAKPOINT_SIZE);
4248                                 code += BREAKPOINT_SIZE;
4249                         }
4250
4251                         mono_add_seq_point (cfg, bb, ins, code - cfg->native_code);
4252
4253                         /*
4254                          * A placeholder for a possible breakpoint inserted by
4255                          * mono_arch_set_breakpoint ().
4256                          */
4257                         for (i = 0; i < (BREAKPOINT_SIZE / S390X_NOP_SIZE); ++i)
4258                                 s390_nop (code);
4259                         break;
4260                 }
4261
4262                 case OP_BR:
4263                         EMIT_UNCOND_BRANCH(ins);
4264                         break;
4265                 case OP_BR_REG: {
4266                         s390_br  (code, ins->sreg1);
4267                 }
4268                         break;
4269                 case OP_CEQ:
4270                 case OP_ICEQ:
4271                 case OP_LCEQ: {
4272                         s390_lghi(code, ins->dreg, 1);
4273                         s390_jz  (code, 4);
4274                         s390_lghi(code, ins->dreg, 0);
4275                 }
4276                         break;
4277                 case OP_CLT:
4278                 case OP_ICLT:
4279                 case OP_LCLT: {
4280                         s390_lghi(code, ins->dreg, 1);
4281                         s390_jl  (code, 4);
4282                         s390_lghi(code, ins->dreg, 0);
4283                 }
4284                         break;
4285                 case OP_CLT_UN:
4286                 case OP_ICLT_UN:
4287                 case OP_LCLT_UN: {
4288                         s390_lghi(code, ins->dreg, 1);
4289                         s390_jlo (code, 4);
4290                         s390_lghi(code, ins->dreg, 0);
4291                 }
4292                         break;
4293                 case OP_CGT:
4294                 case OP_ICGT:
4295                 case OP_LCGT: {
4296                         s390_lghi(code, ins->dreg, 1);
4297                         s390_jh  (code, 4);
4298                         s390_lghi(code, ins->dreg, 0);
4299                 }
4300                         break;
4301                 case OP_CGT_UN:
4302                 case OP_ICGT_UN:
4303                 case OP_LCGT_UN: {
4304                         s390_lghi(code, ins->dreg, 1);
4305                         s390_jho (code, 4);
4306                         s390_lghi(code, ins->dreg, 0);
4307                 }
4308                         break;
4309                 case OP_COND_EXC_EQ:
4310                 case OP_COND_EXC_IEQ:
4311                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_EQ, ins->inst_p1);
4312                         break;
4313                 case OP_COND_EXC_NE_UN:
4314                 case OP_COND_EXC_INE_UN:
4315                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NE, ins->inst_p1);
4316                         break;
4317                 case OP_COND_EXC_LT:
4318                 case OP_COND_EXC_ILT:
4319                 case OP_COND_EXC_LT_UN:
4320                 case OP_COND_EXC_ILT_UN:
4321                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, ins->inst_p1);
4322                         break;
4323                 case OP_COND_EXC_GT:
4324                 case OP_COND_EXC_IGT:
4325                 case OP_COND_EXC_GT_UN:
4326                 case OP_COND_EXC_IGT_UN:
4327                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GT, ins->inst_p1);
4328                         break;
4329                 case OP_COND_EXC_GE:
4330                 case OP_COND_EXC_IGE:
4331                 case OP_COND_EXC_GE_UN:
4332                 case OP_COND_EXC_IGE_UN:
4333                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GE, ins->inst_p1);
4334                         break;
4335                 case OP_COND_EXC_LE:
4336                 case OP_COND_EXC_ILE:
4337                 case OP_COND_EXC_LE_UN:
4338                 case OP_COND_EXC_ILE_UN:
4339                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LE, ins->inst_p1);
4340                         break;
4341                 case OP_COND_EXC_OV:
4342                 case OP_COND_EXC_IOV:
4343                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, ins->inst_p1);
4344                         break;
4345                 case OP_COND_EXC_NO:
4346                 case OP_COND_EXC_INO:
4347                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NO, ins->inst_p1);
4348                         break;
4349                 case OP_COND_EXC_C:
4350                 case OP_COND_EXC_IC:
4351                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, ins->inst_p1);
4352                         break;
4353                 case OP_COND_EXC_NC:
4354                 case OP_COND_EXC_INC:
4355                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, ins->inst_p1);
4356                         break;
4357                 case OP_LBEQ:
4358                 case OP_IBEQ:
4359                         EMIT_COND_BRANCH (ins, S390_CC_EQ);
4360                         break;
4361                 case OP_LBNE_UN:
4362                 case OP_IBNE_UN:
4363                         EMIT_COND_BRANCH (ins, S390_CC_NE);
4364                         break;
4365                 case OP_LBLT:
4366                 case OP_LBLT_UN:
4367                 case OP_IBLT:
4368                 case OP_IBLT_UN:
4369                         EMIT_COND_BRANCH (ins, S390_CC_LT);
4370                         break;
4371                 case OP_LBGT:
4372                 case OP_LBGT_UN:
4373                 case OP_IBGT:
4374                 case OP_IBGT_UN:
4375                         EMIT_COND_BRANCH (ins, S390_CC_GT);
4376                         break;
4377                 case OP_LBGE:
4378                 case OP_LBGE_UN:
4379                 case OP_IBGE:
4380                 case OP_IBGE_UN:
4381                         EMIT_COND_BRANCH (ins, S390_CC_GE);
4382                         break;
4383                 case OP_LBLE:
4384                 case OP_LBLE_UN:
4385                 case OP_IBLE:
4386                 case OP_IBLE_UN:
4387                         EMIT_COND_BRANCH (ins, S390_CC_LE);
4388                         break;
4389
4390                 /* floating point opcodes */
4391                 case OP_R8CONST: {
4392                         if (*((float *) ins->inst_p0) == 0) {
4393                                 s390_lzdr (code, ins->dreg);
4394                         } else {
4395                                 s390_basr  (code, s390_r13, 0);
4396                                 s390_j     (code, 6);
4397                                 s390_llong (code, ins->inst_p0);
4398                                 s390_lg    (code, s390_r13, 0, s390_r13, 4);
4399                                 s390_ld    (code, ins->dreg, 0, s390_r13, 0);
4400                         }
4401                 }
4402                         break;
4403                 case OP_R4CONST: {
4404                         if (*((float *) ins->inst_p0) == 0) {
4405                                 s390_lzdr (code, ins->dreg);
4406                         } else {
4407                                 s390_basr (code, s390_r13, 0);
4408                                 s390_j    (code, 6);
4409                                 s390_llong(code, ins->inst_p0);
4410                                 s390_lg   (code, s390_r13, 0, s390_r13, 4);
4411                                 s390_ldeb (code, ins->dreg, 0, s390_r13, 0);
4412                         }
4413                 }
4414                         break;
4415                 case OP_STORER8_MEMBASE_REG: {
4416                         S390_LONG (code, stdy, std, ins->sreg1, 0,
4417                                    ins->inst_destbasereg, ins->inst_offset);
4418                 }
4419                         break;
4420                 case OP_LOADR8_MEMBASE: {
4421                         S390_LONG (code, ldy, ld, ins->dreg, 0,
4422                                    ins->inst_basereg, ins->inst_offset);
4423                 }
4424                         break;
4425                 case OP_STORER4_MEMBASE_REG: {
4426                         s390_ledbr (code, s390_f15, ins->sreg1);
4427                         S390_LONG (code, stey, ste, s390_f15, 0,
4428                                    ins->inst_destbasereg, ins->inst_offset);
4429                 }
4430                         break;
4431                 case OP_LOADR4_MEMBASE: {
4432                         S390_LONG (code, ldy, ld, s390_f15, 0,
4433                                    ins->inst_basereg, ins->inst_offset);
4434                         s390_ldebr (code, ins->dreg, s390_f15);
4435                 }
4436                         break;
4437                 case OP_ICONV_TO_R_UN: {
4438                         s390_cdfbr (code, ins->dreg, ins->sreg1);
4439                         s390_ltr   (code, ins->sreg1, ins->sreg1);
4440                         s390_jnl   (code, 12);
4441                         s390_basr  (code, s390_r13, 0);
4442                         s390_j     (code, 6);
4443                         s390_word  (code, 0x41f00000);
4444                         s390_word  (code, 0);
4445                         s390_adb   (code, ins->dreg, 0, s390_r13, 4);
4446                 }
4447                         break;
4448                 case OP_LCONV_TO_R_UN: {
4449                         s390_cdgbr (code, ins->dreg, ins->sreg1);
4450                         s390_ltgr  (code, ins->sreg1, ins->sreg1);
4451                         s390_jnl   (code, 12);
4452                         s390_basr  (code, s390_r13, 0);
4453                         s390_j     (code, 6);
4454                         s390_word  (code, 0x41f00000);
4455                         s390_word  (code, 0);
4456                         s390_adb   (code, ins->dreg, 0, s390_r13, 4);
4457                 }
4458                         break;
4459                 case OP_LCONV_TO_R4:
4460                 case OP_ICONV_TO_R4: {
4461                         s390_cdgbr (code, ins->dreg, ins->sreg1);
4462                 }
4463                         break;
4464                 case OP_LCONV_TO_R8:
4465                 case OP_ICONV_TO_R8: {
4466                         s390_cdgbr (code, ins->dreg, ins->sreg1);
4467                 }
4468                         break;
4469                 case OP_FCONV_TO_I1:
4470                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 1, TRUE);
4471                         break;
4472                 case OP_FCONV_TO_U1:
4473                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 1, FALSE);
4474                         break;
4475                 case OP_FCONV_TO_I2:
4476                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 2, TRUE);
4477                         break;
4478                 case OP_FCONV_TO_U2:
4479                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 2, FALSE);
4480                         break;
4481                 case OP_FCONV_TO_I4:
4482                 case OP_FCONV_TO_I:
4483                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 4, TRUE);
4484                         break;
4485                 case OP_FCONV_TO_U4:
4486                 case OP_FCONV_TO_U:
4487                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 4, FALSE);
4488                         break;
4489                 case OP_FCONV_TO_I8:
4490                         s390_cgdbr (code, ins->dreg, 5, ins->sreg1);
4491                         break;
4492                 case OP_LCONV_TO_OVF_I: {
4493                         /* Valid ints: 0xffffffff:8000000 to 00000000:0x7f000000 */
4494                         short int *o[5];
4495                         s390_ltgr (code, ins->sreg2, ins->sreg2);
4496                         s390_jnl  (code, 0); CODEPTR(code, o[0]);
4497                         s390_ltgr (code, ins->sreg1, ins->sreg1);
4498                         s390_jnl  (code, 0); CODEPTR(code, o[1]);
4499                         s390_lhi  (code, s390_r13, -1);
4500                         s390_cgr  (code, ins->sreg1, s390_r13);
4501                         s390_jnz  (code, 0); CODEPTR(code, o[2]);
4502                         if (ins->dreg != ins->sreg2)
4503                                 s390_lgr  (code, ins->dreg, ins->sreg2);
4504                         s390_j    (code, 0); CODEPTR(code, o[3]);
4505                         PTRSLOT(code, o[0]);
4506                         s390_jz   (code, 0); CODEPTR(code, o[4]);
4507                         PTRSLOT(code, o[1]);
4508                         PTRSLOT(code, o[2]);
4509                         mono_add_patch_info (cfg, code - cfg->native_code,
4510                                              MONO_PATCH_INFO_EXC, "OverflowException");
4511                         s390_brasl (code, s390_r14, 0);
4512                         PTRSLOT(code, o[3]);
4513                         PTRSLOT(code, o[4]);
4514                 }
4515                         break;
4516                 case OP_ABS: {
4517                         s390_lpdbr (code, ins->dreg, ins->sreg1);
4518                 }
4519                         break;
4520                 case OP_SQRT: {
4521                         s390_sqdbr (code, ins->dreg, ins->sreg1);
4522                 }
4523                         break;
4524                 case OP_FADD: {
4525                         CHECK_SRCDST_COM_F;
4526                         s390_adbr (code, ins->dreg, src2);
4527                 }
4528                         break;
4529                 case OP_FSUB: {
4530                         CHECK_SRCDST_NCOM_F;
4531                         s390_sdbr (code, ins->dreg, src2);
4532                 }
4533                         break;
4534                 case OP_FMUL: {
4535                         CHECK_SRCDST_COM_F;
4536                         s390_mdbr (code, ins->dreg, src2);
4537                 }
4538                         break;
4539                 case OP_FDIV: {
4540                         CHECK_SRCDST_NCOM_F;
4541                         s390_ddbr (code, ins->dreg, src2);
4542                 }
4543                         break;
4544                 case OP_FNEG: {
4545                         s390_lcdbr (code, ins->dreg, ins->sreg1);
4546                 }
4547                         break;
4548                 case OP_FREM: {
4549                         CHECK_SRCDST_NCOM_F;
4550                         s390_didbr (code, ins->dreg, src2, 5, s390_f15);
4551                 }
4552                         break;
4553                 case OP_FCOMPARE: {
4554                         s390_cdbr (code, ins->sreg1, ins->sreg2);
4555                 }
4556                         break;
4557                 case OP_FCEQ: {
4558                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4559                         s390_lghi  (code, ins->dreg, 1);
4560                         s390_je    (code, 4);
4561                         s390_lghi  (code, ins->dreg, 0);
4562                 }
4563                         break;
4564                 case OP_FCLT: {
4565                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4566                         s390_lghi  (code, ins->dreg, 1);
4567                         s390_jl    (code, 4);
4568                         s390_lghi  (code, ins->dreg, 0);
4569                 }
4570                         break;
4571                 case OP_FCLT_UN: {
4572                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4573                         s390_lghi  (code, ins->dreg, 1);
4574                         s390_jlo   (code, 4);
4575                         s390_lghi  (code, ins->dreg, 0);
4576                 }
4577                         break;
4578                 case OP_FCGT: {
4579                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4580                         s390_lghi  (code, ins->dreg, 1);
4581                         s390_jh    (code, 4);
4582                         s390_lghi  (code, ins->dreg, 0);
4583                 }
4584                         break;
4585                 case OP_FCGT_UN: {
4586                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4587                         s390_lghi  (code, ins->dreg, 1);
4588                         s390_jho   (code, 4);
4589                         s390_lghi  (code, ins->dreg, 0);
4590                 }
4591                         break;
4592                 case OP_FBEQ: {
4593                         short *o;
4594                         s390_jo (code, 0); CODEPTR(code, o);
4595                         EMIT_COND_BRANCH (ins, S390_CC_EQ);
4596                         PTRSLOT (code, o);
4597                 }
4598                         break;
4599                 case OP_FBNE_UN:
4600                         EMIT_COND_BRANCH (ins, S390_CC_NE|S390_CC_OV);
4601                         break;
4602                 case OP_FBLT: {
4603                         short *o;
4604                         s390_jo (code, 0); CODEPTR(code, o);
4605                         EMIT_COND_BRANCH (ins, S390_CC_LT);
4606                         PTRSLOT (code, o);
4607                 }
4608                         break;
4609                 case OP_FBLT_UN:
4610                         EMIT_COND_BRANCH (ins, S390_CC_LT|S390_CC_OV);
4611                         break;
4612                 case OP_FBGT: {
4613                         short *o;
4614                         s390_jo (code, 0); CODEPTR(code, o);
4615                         EMIT_COND_BRANCH (ins, S390_CC_GT);
4616                         PTRSLOT (code, o);
4617                 }
4618                         break;
4619                 case OP_FBGT_UN:
4620                         EMIT_COND_BRANCH (ins, S390_CC_GT|S390_CC_OV);
4621                         break;
4622                 case OP_FBGE: {
4623                         short *o;
4624                         s390_jo (code, 0); CODEPTR(code, o);
4625                         EMIT_COND_BRANCH (ins, S390_CC_GE);
4626                         PTRSLOT (code, o);
4627                 }
4628                         break;
4629                 case OP_FBGE_UN:
4630                         EMIT_COND_BRANCH (ins, S390_CC_GE|S390_CC_OV);
4631                         break;
4632                 case OP_FBLE: {
4633                         short *o;
4634                         s390_jo (code, 0); CODEPTR(code, o);
4635                         EMIT_COND_BRANCH (ins, S390_CC_LE);
4636                         PTRSLOT (code, o);
4637                 }
4638                         break;
4639                 case OP_FBLE_UN:
4640                         EMIT_COND_BRANCH (ins, S390_CC_LE|S390_CC_OV);
4641                         break;
4642                 case OP_CKFINITE: {
4643                         short *o;
4644                         s390_lhi  (code, s390_r13, 0x7f);
4645                         s390_tcdb (code, ins->sreg1, 0, s390_r13, 0);
4646                         s390_jz   (code, 0); CODEPTR(code, o);
4647                         mono_add_patch_info (cfg, code - cfg->native_code,
4648                                              MONO_PATCH_INFO_EXC, "ArithmeticException");
4649                         s390_brasl (code, s390_r14,0);
4650                         PTRSLOT(code, o);
4651                 }
4652                         break;
4653                 case OP_S390_MOVE: {
4654                         if (ins->backend.size > 0) {
4655                                 if (ins->backend.size <= 256) {
4656                                         s390_mvc  (code, ins->backend.size, ins->dreg,
4657                                                    ins->inst_offset, ins->sreg1, ins->inst_imm);
4658                                 } else {
4659                                         s390_lgr  (code, s390_r0, ins->dreg);
4660                                         if (ins->inst_offset > 0) {
4661                                                 if (s390_is_imm16 (ins->inst_offset)) {
4662                                                         s390_aghi (code, s390_r0, ins->inst_offset);
4663                                                 } else {
4664                                                         s390_basr (code, s390_r13, 0);
4665                                                         s390_j    (code, 6);
4666                                                         s390_llong(code, ins->inst_offset);
4667                                                         s390_ag   (code, s390_r0, 0, s390_r13, 4);
4668                                                 }
4669                                         }
4670                                         s390_lgr  (code, s390_r12, ins->sreg1);
4671                                         if (ins->inst_imm > 0) {
4672                                                 if (s390_is_imm16 (ins->inst_imm)) {
4673                                                         s390_aghi (code, s390_r12, ins->inst_imm);
4674                                                 } else {
4675                                                         s390_basr (code, s390_r13, 0);
4676                                                         s390_j    (code, 6);
4677                                                         s390_llong(code, ins->inst_imm);
4678                                                         s390_ag   (code, s390_r12, 0, s390_r13, 4);
4679                                                 }
4680                                         }
4681                                         if (s390_is_imm16 (ins->backend.size)) {
4682                                                 s390_lghi (code, s390_r1, ins->backend.size);
4683                                         } else {
4684                                                 s390_basr (code, s390_r13, 0);
4685                                                 s390_j    (code, 6);
4686                                                 s390_llong(code, ins->backend.size);
4687                                                 s390_lg   (code, s390_r1, 0, s390_r13, 4);
4688                                         }
4689                                         s390_lgr  (code, s390_r13, s390_r1);
4690                                         s390_mvcle(code, s390_r0, s390_r12, 0, 0);
4691                                         s390_jo   (code, -2);
4692                                 }
4693                         }
4694                 }
4695                         break;
4696                 case OP_ATOMIC_ADD_I8: {
4697                         s390_lgr (code, s390_r1, ins->sreg2);
4698                         s390_lg  (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4699                         s390_agr (code, s390_r1, s390_r0);
4700                         s390_csg (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
4701                         s390_jnz (code, -10);
4702                         s390_lgr (code, ins->dreg, s390_r1);
4703                 }
4704                         break;
4705                 case OP_ATOMIC_ADD_NEW_I8: {
4706                         s390_lgr (code, s390_r1, ins->sreg2);
4707                         s390_lg  (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4708                         s390_agr (code, s390_r1, s390_r0);
4709                         s390_csg (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
4710                         s390_jnz (code, -10);
4711                         s390_lgr (code, ins->dreg, s390_r1);
4712                 }
4713                         break;
4714                 case OP_ATOMIC_EXCHANGE_I8: {
4715                         s390_lg  (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4716                         s390_csg (code, s390_r0, ins->sreg2, ins->inst_basereg, ins->inst_offset);
4717                         s390_jnz (code, -6);
4718                         s390_lgr (code, ins->dreg, s390_r0);
4719                 }
4720                         break;
4721                 case OP_ATOMIC_ADD_I4: {
4722                         s390_lgfr(code, s390_r1, ins->sreg2);
4723                         s390_lgf (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4724                         s390_agr (code, s390_r1, s390_r0);
4725                         s390_cs  (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
4726                         s390_jnz (code, -9);
4727                         s390_lgfr(code, ins->dreg, s390_r1);
4728                 }
4729                         break;
4730                 case OP_ATOMIC_ADD_NEW_I4: {
4731                         s390_lgfr(code, s390_r1, ins->sreg2);
4732                         s390_lgf (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4733                         s390_agr (code, s390_r1, s390_r0);
4734                         s390_cs  (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
4735                         s390_jnz (code, -9);
4736                         s390_lgfr(code, ins->dreg, s390_r1);
4737                 }
4738                         break;
4739                 case OP_ATOMIC_EXCHANGE_I4: {
4740                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4741                         s390_cs  (code, s390_r0, ins->sreg2, ins->inst_basereg, ins->inst_offset);
4742                         s390_jnz (code, -4);
4743                         s390_lgfr(code, ins->dreg, s390_r0);
4744                 }
4745                         break;
4746                 case OP_S390_BKCHAIN: {
4747                         s390_lgr  (code, ins->dreg, ins->sreg1);
4748                         if (s390_is_imm16 (cfg->stack_offset)) {
4749                                 s390_aghi (code, ins->dreg, cfg->stack_offset);
4750                         } else {
4751                                 s390_basr (code, s390_r13, 0);
4752                                 s390_j    (code, 6);
4753                                 s390_llong(code, cfg->stack_offset);
4754                                 s390_ag   (code, ins->dreg, 0, s390_r13, 4);
4755                         }
4756                 }
4757                         break;
4758                 case OP_MEMORY_BARRIER: {
4759                 }
4760                         break;
4761                 default:
4762                         g_warning ("unknown opcode %s in %s()\n", mono_inst_name (ins->opcode), __FUNCTION__);
4763                         g_assert_not_reached ();
4764                 }
4765
4766                 if ((cfg->opt & MONO_OPT_BRANCH) && ((code - cfg->native_code - offset) > max_len)) {
4767                         g_warning ("wrong maximal instruction length of instruction %s (expected %d, got %ld)",
4768                                    mono_inst_name (ins->opcode), max_len, code - cfg->native_code - offset);
4769                         g_assert_not_reached ();
4770                 }
4771
4772                 cpos += max_len;
4773
4774                 last_offset = offset;
4775         }
4776
4777         cfg->code_len = code - cfg->native_code;
4778 }
4779
4780 /*========================= End of Function ========================*/
4781
4782 /*------------------------------------------------------------------*/
4783 /*                                                                  */
4784 /* Name         - mono_arch_register_lowlevel_calls                 */
4785 /*                                                                  */
4786 /* Function     - Register routines to help with --trace operation. */
4787 /*                                                                  */
4788 /*------------------------------------------------------------------*/
4789
4790 void
4791 mono_arch_register_lowlevel_calls (void)
4792 {
4793         mono_register_jit_icall (mono_arch_get_lmf_addr, "mono_arch_get_lmf_addr", NULL, TRUE);
4794 }
4795
4796 /*========================= End of Function ========================*/
4797
4798 /*------------------------------------------------------------------*/
4799 /*                                                                  */
4800 /* Name         - mono_arch_patch_code                              */
4801 /*                                                                  */
4802 /* Function     - Process the patch data created during the         */
4803 /*                instruction build process. This resolves jumps,   */
4804 /*                calls, variables etc.                             */
4805 /*                                                                  */
4806 /*------------------------------------------------------------------*/
4807
4808 void
4809 mono_arch_patch_code (MonoMethod *method, MonoDomain *domain,
4810                       guint8 *code, MonoJumpInfo *ji, MonoCodeManager *dyn_code_mp, gboolean run_cctors)
4811 {
4812         MonoJumpInfo *patch_info;
4813
4814         for (patch_info = ji; patch_info; patch_info = patch_info->next) {
4815                 unsigned char *ip = patch_info->ip.i + code;
4816                 gconstpointer target = NULL;
4817
4818                 target = mono_resolve_patch_target (method, domain, code,
4819                                                     patch_info, run_cctors);
4820
4821                 switch (patch_info->type) {
4822                         case MONO_PATCH_INFO_IP:
4823                         case MONO_PATCH_INFO_EXC_NAME:
4824                         case MONO_PATCH_INFO_LDSTR:
4825                         case MONO_PATCH_INFO_TYPE_FROM_HANDLE:
4826                         case MONO_PATCH_INFO_LDTOKEN:
4827                         case MONO_PATCH_INFO_EXC:
4828                         case MONO_PATCH_INFO_ABS:
4829                         case MONO_PATCH_INFO_METHOD:
4830                         case MONO_PATCH_INFO_INTERNAL_METHOD:
4831                         case MONO_PATCH_INFO_CLASS_INIT:
4832                                 s390_patch_addr (ip, (guint64) target);
4833                                 continue;
4834                         case MONO_PATCH_INFO_SWITCH:
4835                                 /*----------------------------------*/
4836                                 /* ip points at the basr r13,0/j +4 */
4837                                 /* instruction the vtable value     */
4838                                 /* follows this (i.e. ip+6)         */
4839                                 /*----------------------------------*/
4840                                 *((gconstpointer *)(ip+6)) = target;
4841                                 continue;
4842                         case MONO_PATCH_INFO_METHODCONST:
4843                         case MONO_PATCH_INFO_CLASS:
4844                         case MONO_PATCH_INFO_IMAGE:
4845                         case MONO_PATCH_INFO_FIELD:
4846                         case MONO_PATCH_INFO_IID:
4847                                 target = S390_RELATIVE(target, ip);
4848                                 s390_patch_rel (ip, (guint64) target);
4849                                 continue;
4850                         case MONO_PATCH_INFO_R4:
4851                         case MONO_PATCH_INFO_R8:
4852                         case MONO_PATCH_INFO_METHOD_REL:
4853                                 g_assert_not_reached ();
4854                                 continue;
4855                         default:
4856                                 target = S390_RELATIVE(target, ip);
4857                                 ip += 2;
4858                                 s390_patch_rel (ip, (guint64) target);
4859                 }
4860         }
4861 }
4862
4863 /*========================= End of Function ========================*/
4864
4865 /*------------------------------------------------------------------*/
4866 /*                                                                  */
4867 /* Name         - emit_load_volatile_arguments                      */
4868 /*                                                                  */
4869 /* Function     - Emit the instructions to reload parameter regist- */
4870 /*                registers for use with "tail" operations.         */
4871 /*                                                                  */
4872 /*                The register loading operations performed here    */
4873 /*                are the mirror of the store operations performed  */
4874 /*                in mono_arch_emit_prolog and need to be kept in   */
4875 /*                synchronization with it.                          */
4876 /*                                                                  */
4877 /*------------------------------------------------------------------*/
4878
4879 guint8 *
4880 emit_load_volatile_arguments (guint8 *code, MonoCompile *cfg)
4881 {
4882         MonoInst *inst;
4883         MonoMethod *method = cfg->method;
4884         MonoMethodSignature *sig = mono_method_signature(method);
4885         int pos = 0, i;
4886         CallInfo *cinfo;
4887
4888         cinfo = get_call_info (NULL, NULL, sig, sig->pinvoke);
4889
4890         if (cinfo->struct_ret) {
4891                 ArgInfo *ainfo = &cinfo->ret;
4892                 inst         = cfg->vret_addr;
4893                 s390_lg (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4894         }
4895
4896         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
4897                 ArgInfo *ainfo = cinfo->args + i;
4898                 inst = cfg->args [pos];
4899
4900                 if (inst->opcode == OP_REGVAR) {
4901                         if (ainfo->regtype == RegTypeGeneral)
4902                                 s390_lgr (code, ainfo->reg, inst->dreg);
4903                         else if (ainfo->regtype == RegTypeFP) {
4904                                 if (inst->dreg != ainfo->reg) {
4905                                         if (ainfo->size == 4) {
4906                                                 s390_ldebr (code, ainfo->reg, inst->dreg);
4907                                         } else {
4908                                                 s390_ldr   (code, ainfo->reg, inst->dreg);
4909                                         }
4910                                 }
4911                         }
4912                         else if (ainfo->regtype == RegTypeBase) {
4913                         } else
4914                                 g_assert_not_reached ();
4915                 } else {
4916                         if (ainfo->regtype == RegTypeGeneral) {
4917                                 if (!((ainfo->reg >= 2) && (ainfo->reg <= 6)))
4918                                         g_assert_not_reached();
4919                                 switch (ainfo->size) {
4920                                 case 1:
4921                                         s390_llgc (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4922                                         break;
4923                                 case 2:
4924                                         s390_lgh  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4925                                         break;
4926                                 case 4:
4927                                         s390_lgf (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4928                                         break;
4929                                 case 8:
4930                                         s390_lg  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4931                                         break;
4932                                 }
4933                         } else if (ainfo->regtype == RegTypeBase) {
4934                         } else if (ainfo->regtype == RegTypeFP) {
4935                                 if (ainfo->size == 8)
4936                                         s390_ld  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4937                                 else if (ainfo->size == 4)
4938                                         s390_le  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4939                                 else
4940                                         g_assert_not_reached ();
4941                         } else if (ainfo->regtype == RegTypeStructByVal) {
4942                                 if (ainfo->reg != STK_BASE) {
4943                                         switch (ainfo->size) {
4944                                         case 1:
4945                                                 s390_llgc (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4946                                                 break;
4947                                         case 2:
4948                                                 s390_lgh (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4949                                                 break;
4950                                         case 4:
4951                                                 s390_lgf (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4952                                                 break;
4953                                         case 8:
4954                                                 s390_lg  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4955                                                 break;
4956                                         }
4957                                 }
4958                         } else if (ainfo->regtype == RegTypeStructByAddr) {
4959                                 if (ainfo->reg != STK_BASE) {
4960                                         s390_lg (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4961                                 }
4962                         } else
4963                                 g_assert_not_reached ();
4964                 }
4965                 pos++;
4966         }
4967
4968         return code;
4969 }
4970
4971 /*========================= End of Function ========================*/
4972
4973 /*------------------------------------------------------------------*/
4974 /*                                                                  */
4975 /* Name         - mono_arch_emit_prolog                             */
4976 /*                                                                  */
4977 /* Function     - Create the instruction sequence for a function    */
4978 /*                prolog.                                           */
4979 /*                                                                  */
4980 /*------------------------------------------------------------------*/
4981
4982 guint8 *
4983 mono_arch_emit_prolog (MonoCompile *cfg)
4984 {
4985         MonoMethod *method = cfg->method;
4986         MonoBasicBlock *bb;
4987         MonoMethodSignature *sig;
4988         MonoInst *inst;
4989         long alloc_size, pos, max_offset, i, cfa_offset = 0;
4990         guint8 *code;
4991         guint32 size;
4992         CallInfo *cinfo;
4993         int tracing = 0;
4994         int lmfOffset;
4995
4996         cfg->code_size   = 512;
4997
4998         if (mono_jit_trace_calls != NULL && mono_trace_eval (method)) {
4999                 tracing         = 1;
5000                 cfg->code_size += 256;
5001         }
5002
5003         if (method->save_lmf)
5004                 cfg->code_size += 200;
5005
5006         cfg->native_code = code = g_malloc (cfg->code_size);
5007
5008         mono_emit_unwind_op_def_cfa (cfg, code, STK_BASE, 0);
5009         emit_unwind_regs(cfg, code, s390_r6, s390_r14, S390_REG_SAVE_OFFSET);
5010         s390_stmg (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
5011         mono_emit_unwind_op_offset (cfg, code, s390_r14, S390_RET_ADDR_OFFSET);
5012
5013         if (cfg->arch.bkchain_reg != -1)
5014                 s390_lgr (code, cfg->arch.bkchain_reg, STK_BASE);
5015
5016         if (cfg->flags & MONO_CFG_HAS_ALLOCA) {
5017                 cfg->used_int_regs |= 1 << 11;
5018         }
5019
5020         alloc_size = cfg->stack_offset;
5021
5022         cfg->stack_usage = cfa_offset = alloc_size;
5023         mono_emit_unwind_op_def_cfa_offset (cfg, code, alloc_size);
5024         s390_lgr  (code, s390_r11, STK_BASE);
5025         if (s390_is_imm16 (alloc_size)) {
5026                 s390_aghi (code, STK_BASE, -alloc_size);
5027         } else {
5028                 int stackSize = alloc_size;
5029                 while (stackSize > 32767) {
5030                         s390_aghi (code, STK_BASE, -32767);
5031                         stackSize -= 32767;
5032                 }
5033                 s390_aghi (code, STK_BASE, -stackSize);
5034         }
5035         s390_stg  (code, s390_r11, 0, STK_BASE, 0);
5036
5037         if (cfg->frame_reg != STK_BASE)
5038                 s390_lgr (code, s390_r11, STK_BASE);
5039
5040         mono_emit_unwind_op_def_cfa_reg (cfg, code, cfg->frame_reg);
5041
5042         /* compute max_offset in order to use short forward jumps
5043          * we always do it on s390 because the immediate displacement
5044          * for jumps is too small
5045          */
5046         max_offset = 0;
5047         for (bb = cfg->bb_entry; bb; bb = bb->next_bb) {
5048                 MonoInst *ins;
5049                 bb->max_offset = max_offset;
5050
5051                 if (cfg->prof_options & MONO_PROFILE_COVERAGE)
5052                         max_offset += 6;
5053
5054                 MONO_BB_FOR_EACH_INS (bb, ins)
5055                         max_offset += ((guint8 *)ins_get_spec (ins->opcode))[MONO_INST_LEN];
5056         }
5057
5058         /* load arguments allocated to register from the stack */
5059         sig = mono_method_signature (method);
5060         pos = 0;
5061
5062         cinfo = get_call_info (cfg, cfg->mempool, sig, sig->pinvoke);
5063
5064         if (cinfo->struct_ret) {
5065                 ArgInfo *ainfo     = &cinfo->ret;
5066                 inst               = cfg->vret_addr;
5067                 inst->backend.size = ainfo->vtsize;
5068                 s390_stg (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
5069         }
5070
5071         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
5072                 ArgInfo *ainfo = cinfo->args + i;
5073                 inst = cfg->args [pos];
5074
5075                 if (inst->opcode == OP_VTARG_ADDR)
5076                         inst = inst->inst_left;
5077
5078                 if (inst->opcode == OP_REGVAR) {
5079                         if (ainfo->regtype == RegTypeGeneral)
5080                                 s390_lgr (code, inst->dreg, ainfo->reg);
5081                         else if (ainfo->regtype == RegTypeFP) {
5082                                 if (inst->dreg != ainfo->reg) {
5083                                         if (ainfo->size == 4) {
5084                                                 s390_ledbr (code, inst->dreg, ainfo->reg);
5085                                         } else {
5086                                                 s390_ldr   (code, inst->dreg, ainfo->reg);
5087                                         }
5088                                 }
5089                         }
5090                         else if (ainfo->regtype == RegTypeBase) {
5091                                 s390_lgr  (code, s390_r13, STK_BASE);
5092                                 s390_aghi (code, s390_r13, alloc_size);
5093                                 s390_lg   (code, inst->dreg, 0, s390_r13, ainfo->offset);
5094                         } else
5095                                 g_assert_not_reached ();
5096
5097                         if (cfg->verbose_level > 2)
5098                                 g_print ("Argument %d assigned to register %s\n",
5099                                          pos, mono_arch_regname (inst->dreg));
5100                 } else {
5101                         if (ainfo->regtype == RegTypeGeneral) {
5102                                 if (!((ainfo->reg >= 2) && (ainfo->reg <= 6)))
5103                                         g_assert_not_reached();
5104                                 switch (ainfo->size) {
5105                                 case 1:
5106                                         s390_stc (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
5107                                         break;
5108                                 case 2:
5109                                         s390_sth (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
5110                                         break;
5111                                 case 4:
5112                                         s390_st (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
5113                                         break;
5114                                 case 8:
5115                                         s390_stg (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
5116                                         break;
5117                                 }
5118                         } else if (ainfo->regtype == RegTypeBase) {
5119                         } else if (ainfo->regtype == RegTypeFP) {
5120                                 if (ainfo->size == 8)
5121                                         s390_std (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
5122                                 else if (ainfo->size == 4)
5123                                         s390_ste (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
5124                                 else
5125                                         g_assert_not_reached ();
5126                         } else if (ainfo->regtype == RegTypeStructByVal) {
5127                                 int doffset = inst->inst_offset;
5128                                 int reg;
5129                                 if (ainfo->reg != STK_BASE)
5130                                         reg = ainfo->reg;
5131                                 else {
5132                                         reg = s390_r0;
5133                                         s390_lgr  (code, s390_r13, STK_BASE);
5134                                         s390_aghi (code, s390_r13, alloc_size);
5135                                 }
5136
5137                                 size = (method->wrapper_type == MONO_WRAPPER_MANAGED_TO_NATIVE
5138                                         ? mono_class_native_size(mono_class_from_mono_type(inst->inst_vtype), NULL)
5139                                         : ainfo->size);
5140
5141                                 switch (size) {
5142                                         case 1:
5143                                                 if (ainfo->reg == STK_BASE)
5144                                                         s390_ic (code, reg, 0, s390_r13, ainfo->offset+7);
5145                                                 s390_stc (code, reg, 0, inst->inst_basereg, doffset);
5146                                                 break;
5147                                         case 2:
5148                                                 if (ainfo->reg == STK_BASE)
5149                                                         s390_lh (code, reg, 0, s390_r13, ainfo->offset+6);
5150                                                 s390_sth (code, reg, 0, inst->inst_basereg, doffset);
5151                                                 break;
5152                                         case 4:
5153                                                 if (ainfo->reg == STK_BASE)
5154                                                         s390_l  (code, reg, 0, s390_r13, ainfo->offset+4);
5155                                                 s390_st (code, reg, 0, inst->inst_basereg, doffset);
5156                                                 break;
5157                                         case 8:
5158                                                 if (ainfo->reg == STK_BASE)
5159                                                         s390_lg  (code, reg, 0, s390_r13, ainfo->offset);
5160                                                 s390_stg (code, reg, 0, inst->inst_basereg, doffset);
5161                                                 break;
5162                                 }
5163                         } else if (ainfo->regtype == RegTypeStructByAddr) {
5164                                 s390_stg (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
5165                         } else if (ainfo->regtype == RegTypeStructByAddrOnStack) {
5166                         } else
5167                                 g_assert_not_reached ();
5168                 }
5169                 pos++;
5170         }
5171
5172         if (method->wrapper_type == MONO_WRAPPER_NATIVE_TO_MANAGED) {
5173                 if (cfg->compile_aot)
5174                         /* AOT code is only used in the root domain */
5175                         s390_lghi (code, s390_r2, 0);
5176                 else {
5177                         s390_basr(code, s390_r14, 0);
5178                         s390_j   (code, 6);
5179                         s390_llong(code, cfg->domain);
5180                         s390_lg  (code, s390_r2, 0, s390_r14, 4);
5181                 }
5182
5183                 s390_basr(code, s390_r14, 0);
5184                 s390_j   (code, 6);
5185                 mono_add_patch_info (cfg, code - cfg->native_code,
5186                                      MONO_PATCH_INFO_INTERNAL_METHOD,
5187                                      (gpointer)"mono_jit_thread_attach");
5188                 s390_llong(code, 0);
5189                 s390_lg   (code, s390_r1, 0, s390_r14, 4);
5190                 s390_basr (code, s390_r14, s390_r1);
5191         }
5192
5193         if (method->save_lmf) {
5194                 /*---------------------------------------------------------------*/
5195                 /* build the MonoLMF structure on the stack - see mini-s390x.h   */
5196                 /*---------------------------------------------------------------*/
5197                 lmfOffset = alloc_size - sizeof(MonoLMF);
5198
5199                 s390_lgr   (code, s390_r13, cfg->frame_reg);
5200                 s390_aghi  (code, s390_r13, lmfOffset);
5201
5202                 /*---------------------------------------------------------------*/
5203                 /* Preserve the parameter registers while we fix up the lmf      */
5204                 /*---------------------------------------------------------------*/
5205                 s390_stmg  (code, s390_r2, s390_r6, s390_r13,
5206                             G_STRUCT_OFFSET(MonoLMF, pregs[0]));
5207
5208                 /*---------------------------------------------------------------*/
5209                 /* On return from this call r2 have the address of the &lmf      */
5210                 /*---------------------------------------------------------------*/
5211                 s390_basr(code, s390_r14, 0);
5212                 s390_j   (code, 6);
5213                 mono_add_patch_info (cfg, code - cfg->native_code,
5214                                      MONO_PATCH_INFO_INTERNAL_METHOD,
5215                                      (gpointer)"mono_get_lmf_addr");
5216                 s390_llong(code, 0);
5217                 s390_lg   (code, s390_r1, 0, s390_r14, 4);
5218                 s390_basr (code, s390_r14, s390_r1);
5219
5220                 /*---------------------------------------------------------------*/
5221                 /* Set lmf.lmf_addr = jit_tls->lmf                               */
5222                 /*---------------------------------------------------------------*/
5223                 s390_stg   (code, s390_r2, 0, s390_r13,
5224                             G_STRUCT_OFFSET(MonoLMF, lmf_addr));
5225
5226                 /*---------------------------------------------------------------*/
5227                 /* Get current lmf                                               */
5228                 /*---------------------------------------------------------------*/
5229                 s390_lg    (code, s390_r0, 0, s390_r2, 0);
5230
5231                 /*---------------------------------------------------------------*/
5232                 /* Set our lmf as the current lmf                                */
5233                 /*---------------------------------------------------------------*/
5234                 s390_stg   (code, s390_r13, 0, s390_r2, 0);
5235
5236                 /*---------------------------------------------------------------*/
5237                 /* Have our lmf.previous_lmf point to the last lmf               */
5238                 /*---------------------------------------------------------------*/
5239                 s390_stg   (code, s390_r0, 0, s390_r13,
5240                             G_STRUCT_OFFSET(MonoLMF, previous_lmf));
5241
5242                 /*---------------------------------------------------------------*/
5243                 /* save method info                                              */
5244                 /*---------------------------------------------------------------*/
5245                 s390_basr  (code, s390_r1, 0);
5246                 s390_j     (code, 6);
5247                 s390_llong (code, method);
5248                 s390_lg    (code, s390_r1, 0, s390_r1, 4);
5249                 s390_stg   (code, s390_r1, 0, s390_r13,
5250                             G_STRUCT_OFFSET(MonoLMF, method));
5251
5252                 /*---------------------------------------------------------------*/
5253                 /* save the current IP                                           */
5254                 /*---------------------------------------------------------------*/
5255                 s390_stg   (code, STK_BASE, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, ebp));
5256                 s390_basr  (code, s390_r1, 0);
5257                 s390_stg   (code, s390_r1, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, eip));
5258
5259                 /*---------------------------------------------------------------*/
5260                 /* Save general and floating point registers                     */
5261                 /*---------------------------------------------------------------*/
5262                 s390_stmg  (code, s390_r2, s390_r12, s390_r13,
5263                             G_STRUCT_OFFSET(MonoLMF, gregs[2]));
5264                 for (i = 0; i < 16; i++) {
5265                         s390_std  (code, i, 0, s390_r13,
5266                                    G_STRUCT_OFFSET(MonoLMF, fregs[i]));
5267                 }
5268
5269                 /*---------------------------------------------------------------*/
5270                 /* Restore the parameter registers now that we've set up the lmf */
5271                 /*---------------------------------------------------------------*/
5272                 s390_lmg   (code, s390_r2, s390_r6, s390_r13,
5273                             G_STRUCT_OFFSET(MonoLMF, pregs[0]));
5274         }
5275
5276         if (tracing)
5277                 code = mono_arch_instrument_prolog(cfg, enter_method, code, TRUE);
5278
5279         cfg->code_len = code - cfg->native_code;
5280         g_assert (cfg->code_len < cfg->code_size);
5281
5282         return code;
5283 }
5284
5285 /*========================= End of Function ========================*/
5286
5287 /*------------------------------------------------------------------*/
5288 /*                                                                  */
5289 /* Name         - mono_arch_emit_epilog                             */
5290 /*                                                                  */
5291 /* Function     - Emit the instructions for a function epilog.      */
5292 /*                                                                  */
5293 /*------------------------------------------------------------------*/
5294
5295 void
5296 mono_arch_emit_epilog (MonoCompile *cfg)
5297 {
5298         MonoMethod *method = cfg->method;
5299         int tracing = 0;
5300         guint8 *code;
5301         int max_epilog_size = 96;
5302
5303         if (cfg->method->save_lmf)
5304                 max_epilog_size += 128;
5305
5306         if (mono_jit_trace_calls != NULL)
5307                 max_epilog_size += 128;
5308
5309         if (cfg->prof_options & MONO_PROFILE_ENTER_LEAVE)
5310                 max_epilog_size += 128;
5311
5312         while ((cfg->code_len + max_epilog_size) > (cfg->code_size - 16)) {
5313                 cfg->code_size  *= 2;
5314                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
5315                 cfg->stat_code_reallocs++;
5316         }
5317
5318         code = cfg->native_code + cfg->code_len;
5319
5320         if (mono_jit_trace_calls != NULL && mono_trace_eval (method)) {
5321                 code = mono_arch_instrument_epilog (cfg, leave_method, code, TRUE);
5322                 tracing = 1;
5323         }
5324
5325         if (method->save_lmf)
5326                 restoreLMF(code, cfg->frame_reg, cfg->stack_usage);
5327
5328         if (cfg->flags & MONO_CFG_HAS_ALLOCA) {
5329 //              if (cfg->frame_reg != STK_BASE)
5330 //                      s390_lgr (code, STK_BASE, cfg->frame_reg);
5331                 s390_lg  (code, STK_BASE, 0, STK_BASE, 0);
5332         } else
5333                 code = backUpStackPtr(cfg, code);
5334
5335         s390_lmg (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
5336         s390_br  (code, s390_r14);
5337
5338         cfg->code_len = code - cfg->native_code;
5339
5340         g_assert (cfg->code_len < cfg->code_size);
5341
5342 }
5343
5344 /*========================= End of Function ========================*/
5345
5346 /*------------------------------------------------------------------*/
5347 /*                                                                  */
5348 /* Name         - mono_arch_emit_exceptions                         */
5349 /*                                                                  */
5350 /* Function     - Emit the blocks to handle exception conditions.   */
5351 /*                                                                  */
5352 /*------------------------------------------------------------------*/
5353
5354 void
5355 mono_arch_emit_exceptions (MonoCompile *cfg)
5356 {
5357         MonoJumpInfo    *patch_info;
5358         guint8          *code;
5359         int             nThrows = 0,
5360                         exc_count = 0,
5361                         iExc;
5362         guint32         code_size;
5363         MonoClass       *exc_classes [MAX_EXC];
5364         guint8          *exc_throw_start [MAX_EXC];
5365
5366         for (patch_info = cfg->patch_info;
5367              patch_info;
5368              patch_info = patch_info->next) {
5369                 if (patch_info->type == MONO_PATCH_INFO_EXC)
5370                         exc_count++;
5371         }
5372
5373         code_size = exc_count * 48;
5374
5375         while ((cfg->code_len + code_size) > (cfg->code_size - 16)) {
5376                 cfg->code_size  *= 2;
5377                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
5378                 cfg->stat_code_reallocs++;
5379         }
5380
5381         code = cfg->native_code + cfg->code_len;
5382
5383         /*---------------------------------------------------------------------*/
5384         /* Add code to raise exceptions                                        */
5385         /*---------------------------------------------------------------------*/
5386         for (patch_info = cfg->patch_info; patch_info; patch_info = patch_info->next) {
5387                 switch (patch_info->type) {
5388                 case MONO_PATCH_INFO_EXC: {
5389                         guint8 *ip = patch_info->ip.i + cfg->native_code;
5390                         MonoClass *exc_class;
5391                         guint64 throw_ip;
5392
5393                         /*-----------------------------------------------------*/
5394                         /* Patch the branch in epilog to come here             */
5395                         /*-----------------------------------------------------*/
5396                         s390_patch_rel (ip + 2, (guint64) S390_RELATIVE(code,ip));
5397
5398                         exc_class = mono_class_from_name (mono_defaults.corlib,
5399                                                           "System",
5400                                                           patch_info->data.name);
5401                         g_assert (exc_class);
5402                         throw_ip = patch_info->ip.i;
5403
5404                         for (iExc = 0; iExc < nThrows; ++iExc)
5405                                 if (exc_classes [iExc] == exc_class)
5406                                         break;
5407
5408                         if (iExc < nThrows) {
5409                                 s390_jcl (code, S390_CC_UN,
5410                                           (guint64) exc_throw_start [iExc]);
5411                                 patch_info->type = MONO_PATCH_INFO_NONE;
5412                         } else {
5413
5414                                 if (nThrows < MAX_EXC) {
5415                                         exc_classes [nThrows]     = exc_class;
5416                                         exc_throw_start [nThrows] = code;
5417                                 }
5418
5419                                 /*---------------------------------------------*/
5420                                 /* Patch the parameter passed to the handler   */
5421                                 /*---------------------------------------------*/
5422                                 s390_basr (code, s390_r13, 0);
5423                                 s390_j    (code, 6);
5424 //                              s390_llong(code, patch_info->data.target);
5425                                 s390_llong(code, exc_class->type_token);
5426                                 /*---------------------------------------------*/
5427                                 /* Load return address & parameter register    */
5428                                 /*---------------------------------------------*/
5429                                 s390_larl (code, s390_r14, (guint64)S390_RELATIVE((patch_info->ip.i +
5430                                                            cfg->native_code + 8), code));
5431                                 s390_lg   (code, s390_r2, 0, s390_r13, 4);
5432                                 /*---------------------------------------------*/
5433                                 /* Reuse the current patch to set the jump     */
5434                                 /*---------------------------------------------*/
5435                                 s390_basr (code, s390_r13, 0);
5436                                 s390_j    (code, 6);
5437                                 patch_info->type      = MONO_PATCH_INFO_INTERNAL_METHOD;
5438                                 patch_info->data.name = "mono_arch_throw_corlib_exception";
5439                                 patch_info->ip.i      = code - cfg->native_code;
5440                                 s390_llong(code, 0);
5441                                 s390_lg   (code, s390_r1, 0, s390_r13, 4);
5442                                 s390_br   (code, s390_r1);
5443                         }
5444                         break;
5445                 }
5446                 default:
5447                         /* do nothing */
5448                         break;
5449                 }
5450         }
5451
5452         cfg->code_len = code - cfg->native_code;
5453
5454         g_assert (cfg->code_len < cfg->code_size);
5455
5456 }
5457
5458 /*========================= End of Function ========================*/
5459
5460 /*------------------------------------------------------------------*/
5461 /*                                                                  */
5462 /* Name         - mono_arch_setup_jit_tls_data                      */
5463 /*                                                                  */
5464 /* Function     - Setup the JIT's Thread Level Specific Data.       */
5465 /*                                                                  */
5466 /*------------------------------------------------------------------*/
5467
5468 void
5469 mono_arch_setup_jit_tls_data (MonoJitTlsData *tls)
5470 {
5471         if (!tls_offset_inited) {
5472                 tls_offset_inited = TRUE;
5473
5474 #if HAVE_KW_THREAD
5475 # if 0
5476         __asm__ ("\tear\t%r1,0\n"
5477                  "\tlr\t%0,%3\n"
5478                  "\tsr\t%0,%r1\n"
5479                  "\tlr\t%1,%4\n"
5480                  "\tsr\t%1,%r1\n"
5481                  "\tlr\t%2,%5\n"
5482                  "\tsr\t%2,%r1\n"
5483                  : "=r" (appdomain_tls_offset),
5484                    "=r" (thread_tls_offset),
5485                    "=r" (lmf_tls_offset)
5486                  : "r" (&tls_appdomain),
5487                    "r" (&tls_current_object),
5488                    "r" (&mono_lmf_addr)
5489                  : "1", "cc");
5490 # endif
5491 #endif
5492         }
5493
5494         if (!lmf_addr_key_inited) {
5495                 lmf_addr_key_inited = TRUE;
5496                 pthread_key_create (&lmf_addr_key, NULL);
5497         }
5498         pthread_setspecific (lmf_addr_key, &tls->lmf);
5499
5500 }
5501
5502 /*========================= End of Function ========================*/
5503
5504 /*------------------------------------------------------------------*/
5505 /*                                                                  */
5506 /* Name         - mono_arch_free_jit_tls_data                       */
5507 /*                                                                  */
5508 /* Function     - Free tls data.                                    */
5509 /*                                                                  */
5510 /*------------------------------------------------------------------*/
5511
5512 void
5513 mono_arch_free_jit_tls_data (MonoJitTlsData *tls)
5514 {
5515 }
5516
5517 /*========================= End of Function ========================*/
5518
5519 /*------------------------------------------------------------------*/
5520 /*                                                                  */
5521 /* Name         - mono_arch_emit_inst_for_method                        */
5522 /*                                                                  */
5523 /*------------------------------------------------------------------*/
5524
5525 MonoInst*
5526 mono_arch_emit_inst_for_method (MonoCompile *cfg, MonoMethod *cmethod, MonoMethodSignature *fsig, MonoInst **args)
5527 {
5528         return NULL;
5529 }
5530
5531 /*========================= End of Function ========================*/
5532
5533 /*------------------------------------------------------------------*/
5534 /*                                                                  */
5535 /* Name         - mono_arch_decompose_opts                          */
5536 /*                                                                  */
5537 /* Function     - Decompose opcode into a System z opcode.          */
5538 /*                                                                  */
5539 /*------------------------------------------------------------------*/
5540
5541 void
5542 mono_arch_decompose_opts (MonoCompile *cfg, MonoInst *ins)
5543 {
5544         /*
5545          * Have to rename these to avoid being decomposed normally, since the normal
5546          * decomposition does not work on S390.
5547          */
5548         switch (ins->opcode) {
5549         case OP_ISUB_OVF:
5550                 ins->opcode = OP_S390_ISUB_OVF;
5551                 break;
5552         case OP_ISUB_OVF_UN:
5553                 ins->opcode = OP_S390_ISUB_OVF_UN;
5554                 break;
5555         case OP_IADD_OVF:
5556                 ins->opcode = OP_S390_IADD_OVF;
5557                 break;
5558         case OP_IADD_OVF_UN:
5559                 ins->opcode = OP_S390_IADD_OVF_UN;
5560                 break;
5561         case OP_LADD_OVF:
5562                 ins->opcode = OP_S390_LADD_OVF;
5563                 break;
5564         case OP_LADD_OVF_UN:
5565                 ins->opcode = OP_S390_LADD_OVF_UN;
5566                 break;
5567         case OP_LSUB_OVF:
5568                 ins->opcode = OP_S390_LSUB_OVF;
5569                 break;
5570         case OP_LSUB_OVF_UN:
5571                 ins->opcode = OP_S390_LSUB_OVF_UN;
5572                 break;
5573         default:
5574                 break;
5575         }
5576 }
5577
5578 /*========================= End of Function ========================*/
5579
5580 /*------------------------------------------------------------------*/
5581 /*                                                                  */
5582 /* Name         - mono_arch_print_tree                              */
5583 /*                                                                  */
5584 /* Function     - Print platform-specific opcode details.           */
5585 /*                                                                  */
5586 /* Returns      - 1 - opcode details have been printed              */
5587 /*                0 - opcode details have not been printed          */
5588 /*                                                                  */
5589 /*------------------------------------------------------------------*/
5590
5591 gboolean
5592 mono_arch_print_tree (MonoInst *tree, int arity)
5593 {
5594         gboolean done;
5595
5596         switch (tree->opcode) {
5597                 case OP_S390_LOADARG:
5598                 case OP_S390_ARGREG:
5599                 case OP_S390_ARGPTR:
5600                         printf ("[0x%lx(%s)]", tree->inst_offset,
5601                                 mono_arch_regname (tree->inst_basereg));
5602                         done = 1;
5603                         break;
5604                 case OP_S390_STKARG:
5605                         printf ("[0x%lx(previous_frame)]",
5606                                 tree->inst_offset);
5607                         done = 1;
5608                         break;
5609                 case OP_S390_MOVE:
5610                         printf ("[0x%lx(%d,%s),0x%lx(%s)]",
5611                                 tree->inst_offset, tree->backend.size,
5612                                 mono_arch_regname(tree->dreg),
5613                                 tree->inst_imm,
5614                                 mono_arch_regname(tree->sreg1));
5615                         done = 1;
5616                         break;
5617                 case OP_S390_SETF4RET:
5618                         printf ("[f%s,f%s]",
5619                                 mono_arch_regname (tree->dreg),
5620                                 mono_arch_regname (tree->sreg1));
5621                         done = 1;
5622                         break;
5623                 case OP_TLS_GET:
5624                         printf ("[0x%lx(0x%lx,%s)]", tree->inst_offset,
5625                                 tree->inst_imm,
5626                                 mono_arch_regname (tree->sreg1));
5627                         done = 1;
5628                         break;
5629                 case OP_S390_BKCHAIN:
5630                         printf ("[previous_frame(%s)]",
5631                                 mono_arch_regname (tree->sreg1));
5632                         done = 1;
5633                 default:
5634                         done = 0;
5635         }
5636         return (done);
5637 }
5638
5639 /*========================= End of Function ========================*/
5640
5641 /*------------------------------------------------------------------*/
5642 /*                                                                  */
5643 /* Name         - mono_arch_regalloc_cost                           */
5644 /*                                                                  */
5645 /* Function     - Determine the cost, in the number of memory       */
5646 /*                references, of the action of allocating the var-  */
5647 /*                iable VMV into a register during global register  */
5648 /*                allocation.                                       */
5649 /*                                                                  */
5650 /* Returns      - Cost                                              */
5651 /*                                                                  */
5652 /*------------------------------------------------------------------*/
5653
5654 guint32
5655 mono_arch_regalloc_cost (MonoCompile *cfg, MonoMethodVar *vmv)
5656 {
5657         /* FIXME: */
5658         return 2;
5659 }
5660
5661 /*========================= End of Function ========================*/
5662
5663 /*------------------------------------------------------------------*/
5664 /*                                                                  */
5665 /* Name         - mono_arch_get_domain_intrinsic                    */
5666 /*                                                                  */
5667 /* Function     -                                                   */
5668 /*                                                                  */
5669 /* Returns      -                                                   */
5670 /*                                                                  */
5671 /*------------------------------------------------------------------*/
5672
5673 MonoInst *
5674 mono_arch_get_domain_intrinsic (MonoCompile* cfg)
5675 {
5676         MonoInst *ins;
5677
5678         if (appdomain_tls_offset == -1)
5679                 return NULL;
5680
5681         MONO_INST_NEW (cfg, ins, OP_TLS_GET);
5682         ins->inst_offset = appdomain_tls_offset;
5683         return (ins);
5684 }
5685
5686 /*========================= End of Function ========================*/
5687
5688 /*------------------------------------------------------------------*/
5689 /*                                                                  */
5690 /* Name         - mono_arch_flush_register_windows                  */
5691 /*                                                                  */
5692 /* Function     -                                                   */
5693 /*                                                                  */
5694 /* Returns      -                                                   */
5695 /*                                                                  */
5696 /*------------------------------------------------------------------*/
5697
5698 void
5699 mono_arch_flush_register_windows (void)
5700 {
5701 }
5702
5703 /*========================= End of Function ========================*/
5704
5705 /*------------------------------------------------------------------*/
5706 /*                                                                  */
5707 /* Name         - mono_arch_get_lmf_addr                            */
5708 /*                                                                  */
5709 /* Function     -                                                   */
5710 /*                                                                  */
5711 /* Returns      -                                                   */
5712 /*                                                                  */
5713 /*------------------------------------------------------------------*/
5714
5715 gpointer
5716 mono_arch_get_lmf_addr (void)
5717 {
5718         return pthread_getspecific (lmf_addr_key);
5719 }
5720
5721 /*========================= End of Function ========================*/
5722
5723 /*------------------------------------------------------------------*/
5724 /*                                                                  */
5725 /* Name         - mono_arch_is_inst_imm                             */
5726 /*                                                                  */
5727 /* Function     - Determine if operand qualifies as an immediate    */
5728 /*                value. For s390 this is a value -32768-32768      */
5729 /*                                                                  */
5730 /* Returns      - True|False - is [not] immediate value.            */
5731 /*                                                                  */
5732 /*------------------------------------------------------------------*/
5733
5734 gboolean
5735 mono_arch_is_inst_imm (gint64 imm)
5736 {
5737         return s390_is_imm16 (imm);
5738 }
5739
5740 /*========================= End of Function ========================*/
5741
5742 /*------------------------------------------------------------------*/
5743 /*                                                                  */
5744 /* Name         - mono_arch_get_patch_offset                        */
5745 /*                                                                  */
5746 /* Function     - Dummy entry point until s390x supports aot.       */
5747 /*                                                                  */
5748 /* Returns      - Offset for patch.                                 */
5749 /*                                                                  */
5750 /*------------------------------------------------------------------*/
5751
5752 guint32
5753 mono_arch_get_patch_offset (guint8 *code)
5754 {
5755         return 0;
5756 }
5757
5758 /*========================= End of Function ========================*/
5759
5760 /*------------------------------------------------------------------*/
5761 /*                                                                  */
5762 /* Name         - mono_arch_context_get_int_reg.                    */
5763 /*                                                                  */
5764 /* Function     -                                                   */
5765 /*                                                                  */
5766 /* Returns      - Return a register from the context.               */
5767 /*                                                                  */
5768 /*------------------------------------------------------------------*/
5769
5770 mgreg_t
5771 mono_arch_context_get_int_reg (MonoContext *ctx, int reg)
5772 {
5773         return ((mgreg_t) ctx->uc_mcontext.gregs[reg]);
5774 }
5775
5776 /*========================= End of Function ========================*/
5777
5778 /*------------------------------------------------------------------*/
5779 /*                                                                  */
5780 /* Name         - mono_arch_context_set_int_reg.                    */
5781 /*                                                                  */
5782 /* Function     - Set a value in a specified register.              */
5783 /*                                                                  */
5784 /*------------------------------------------------------------------*/
5785
5786 void
5787 mono_arch_context_set_int_reg (MonoContext *ctx, int reg, mgreg_t val)
5788 {
5789         ctx->uc_mcontext.gregs[reg] = val;
5790 }
5791
5792 /*========================= End of Function ========================*/
5793
5794 /*------------------------------------------------------------------*/
5795 /*                                                                  */
5796 /* Name         - mono_arch_get_this_arg_from_call.                 */
5797 /*                                                                  */
5798 /* Function     -                                                   */
5799 /*                                                                  */
5800 /*------------------------------------------------------------------*/
5801
5802 gpointer
5803 mono_arch_get_this_arg_from_call (mgreg_t *regs, guint8 *code)
5804 {
5805         MonoLMF *lmf = (MonoLMF *) ((gchar *) regs - sizeof(MonoLMF));
5806
5807         return (gpointer) lmf->gregs [s390_r2];
5808 }
5809
5810 /*========================= End of Function ========================*/
5811
5812 /*------------------------------------------------------------------*/
5813 /*                                                                  */
5814 /* Name         - get_delegate_invoke_impl.                         */
5815 /*                                                                  */
5816 /* Function     -                                                   */
5817 /*                                                                  */
5818 /*------------------------------------------------------------------*/
5819
5820 static gpointer
5821 get_delegate_invoke_impl (gboolean has_target, guint32 param_count, guint32 *code_len, gboolean aot)
5822 {
5823         guint8 *code, *start;
5824
5825         if (has_target) {
5826                 int size = 32;
5827
5828                 start = code = mono_global_codeman_reserve (size);
5829
5830                 /* Replace the this argument with the target */
5831                 s390_lg   (code, s390_r1, 0, s390_r2, G_STRUCT_OFFSET(MonoDelegate, method_ptr));
5832                 s390_lg   (code, s390_r2, 0, s390_r2, G_STRUCT_OFFSET(MonoDelegate, target));
5833                 s390_br   (code, s390_r1);
5834                 g_assert ((code - start) <= size);
5835
5836                 mono_arch_flush_icache (start, size);
5837         } else {
5838                 int size, i;
5839
5840                 size = 32 + param_count * 8;
5841                 start = code = mono_global_codeman_reserve (size);
5842
5843                 s390_lg   (code, s390_r1, 0, s390_r2, G_STRUCT_OFFSET(MonoDelegate, method_ptr));
5844                 /* slide down the arguments */
5845                 for (i = 0; i < param_count; ++i) {
5846                         s390_lgr (code, (s390_r2 + i), (s390_r2 + i + 1));
5847                 }
5848                 s390_br   (code, s390_r1);
5849
5850                 g_assert ((code - start) <= size);
5851
5852                 mono_arch_flush_icache (start, size);
5853         }
5854
5855         if (code_len)
5856                 *code_len = code - start;
5857
5858         return start;
5859 }
5860
5861 /*========================= End of Function ========================*/
5862
5863 /*------------------------------------------------------------------*/
5864 /*                                                                  */
5865 /* Name         - mono_arch_get_delegate_invoke_impls.              */
5866 /*                                                                  */
5867 /* Function     -                                                   */
5868 /*                                                                  */
5869 /*------------------------------------------------------------------*/
5870
5871 GSList*
5872 mono_arch_get_delegate_invoke_impls (void)
5873 {
5874         GSList *res = NULL;
5875         guint8 *code;
5876         guint32 code_len;
5877         int i;
5878
5879         code = get_delegate_invoke_impl (TRUE, 0, &code_len, TRUE);
5880         res = g_slist_prepend (res, mono_tramp_info_create (g_strdup ("delegate_invoke_impl_has_target"), code, code_len, NULL, NULL));
5881
5882         for (i = 0; i < MAX_ARCH_DELEGATE_PARAMS; ++i) {
5883                 code = get_delegate_invoke_impl (FALSE, i, &code_len, TRUE);
5884                 res = g_slist_prepend (res, mono_tramp_info_create (g_strdup_printf ("delegate_invoke_impl_target_%d", i), code, code_len, NULL, NULL));
5885         }
5886
5887         return res;
5888 }
5889
5890 /*========================= End of Function ========================*/
5891
5892 /*------------------------------------------------------------------*/
5893 /*                                                                  */
5894 /* Name         - mono_arch_get_delegate_invoke_impl.               */
5895 /*                                                                  */
5896 /* Function     -                                                   */
5897 /*                                                                  */
5898 /*------------------------------------------------------------------*/
5899
5900 gpointer
5901 mono_arch_get_delegate_invoke_impl (MonoMethodSignature *sig, gboolean has_target)
5902 {
5903         guint8 *code, *start;
5904
5905         /* FIXME: Support more cases */
5906         if (MONO_TYPE_ISSTRUCT (sig->ret))
5907                 return NULL;
5908
5909         if (has_target) {
5910                 static guint8* cached = NULL;
5911
5912                 if (cached)
5913                         return cached;
5914
5915                 if (mono_aot_only)
5916                         start = mono_aot_get_trampoline ("delegate_invoke_impl_has_target");
5917                 else
5918                         start = get_delegate_invoke_impl (TRUE, 0, NULL, FALSE);
5919
5920                 mono_memory_barrier ();
5921
5922                 cached = start;
5923         } else {
5924                 static guint8* cache [MAX_ARCH_DELEGATE_PARAMS + 1] = {NULL};
5925                 int i;
5926
5927                 if (sig->param_count > MAX_ARCH_DELEGATE_PARAMS)
5928                         return NULL;
5929                 for (i = 0; i < sig->param_count; ++i)
5930                         if (!mono_is_regsize_var (sig->params [i]))
5931                                 return NULL;
5932
5933
5934                 code = cache [sig->param_count];
5935                 if (code)
5936                         return code;
5937
5938                 if (mono_aot_only) {
5939                         char *name = g_strdup_printf ("delegate_invoke_impl_target_%d", sig->param_count);
5940                         start = mono_aot_get_trampoline (name);
5941                         g_free (name);
5942                 } else {
5943                         start = get_delegate_invoke_impl (FALSE, sig->param_count, NULL, FALSE);
5944                 }
5945
5946                 mono_memory_barrier ();
5947
5948                 cache [sig->param_count] = start;
5949         }
5950         return start;
5951 }
5952
5953 /*========================= End of Function ========================*/
5954
5955 /*------------------------------------------------------------------*/
5956 /*                                                                  */
5957 /* Name         - mono_arch_build_imt_thunk.                        */
5958 /*                                                                  */
5959 /* Function     -                                                   */
5960 /*                                                                  */
5961 /*------------------------------------------------------------------*/
5962
5963 gpointer
5964 mono_arch_build_imt_thunk (MonoVTable *vtable, MonoDomain *domain,
5965                            MonoIMTCheckItem **imt_entries, int count,
5966                            gpointer fail_tramp)
5967 {
5968         int i;
5969         int size = 0;
5970         guchar *code, *start;
5971
5972         for (i = 0; i < count; ++i) {
5973                 MonoIMTCheckItem *item = imt_entries [i];
5974                 if (item->is_equals) {
5975                         if (item->check_target_idx) {
5976                                 if (!item->compare_done)
5977                                         item->chunk_size += CMP_SIZE + JUMP_SIZE;
5978                                 if (item->has_target_code)
5979                                         item->chunk_size += BR_SIZE + JUMP_SIZE + LOADCON_SIZE;
5980                                 else
5981                                         item->chunk_size += BR_SIZE + JUMP_SIZE + LOADCON_SIZE +
5982                                                             LOAD_SIZE;
5983                         } else {
5984                                 if (fail_tramp) {
5985                                         item->chunk_size += CMP_SIZE + 2 * BR_SIZE + JUMP_SIZE +
5986                                                             2 * LOADCON_SIZE;
5987                                         if (!item->has_target_code)
5988                                                 item->chunk_size += LOAD_SIZE;
5989                                 } else {
5990                                         item->chunk_size += LOADCON_SIZE + LOAD_SIZE + BR_SIZE;
5991 #if ENABLE_WRONG_METHOD_CHECK
5992                                         item->chunk_size += CMP_SIZE + JUMP_SIZE;
5993 #endif
5994                                 }
5995                         }
5996                 } else {
5997                         item->chunk_size += CMP_SIZE + JUMP_SIZE;
5998                         imt_entries [item->check_target_idx]->compare_done = TRUE;
5999                 }
6000                 size += item->chunk_size;
6001         }
6002
6003         if (fail_tramp)
6004                 code = mono_method_alloc_generic_virtual_thunk (domain, size);
6005         else
6006                 code = mono_domain_code_reserve (domain, size);
6007
6008         start = code;
6009
6010         for (i = 0; i < count; ++i) {
6011                 MonoIMTCheckItem *item = imt_entries [i];
6012                 item->code_target = (guint8 *) code;
6013                 if (item->is_equals) {
6014                         if (item->check_target_idx) {
6015                                 if (!item->compare_done) {
6016                                         s390_basr (code, s390_r13, s390_r0);
6017                                         s390_j    (code, 6);
6018                                         s390_llong(code, item->key);
6019                                         s390_lg   (code, s390_r0, 0, s390_r13, 4);
6020                                         s390_cgr  (code, s390_r0, MONO_ARCH_IMT_REG);
6021                                 }
6022                                 item->jmp_code = (guint8*) code;
6023                                 s390_jcl (code, S390_CC_NE, 0);
6024
6025                                 s390_basr (code, s390_r13, s390_r0);
6026                                 s390_j    (code, 6);
6027                                 if (item->has_target_code)  {
6028                                         s390_llong(code, item->value.target_code);
6029                                         s390_lg   (code, s390_r1, 0, s390_r13, 4);
6030                                 } else {
6031                                         s390_llong(code, (&(vtable->vtable [item->value.vtable_slot])));
6032                                         s390_lg   (code, s390_r1, 0, s390_r13, 4);
6033                                         s390_lg   (code, s390_r1, 0, s390_r1, 0);
6034                                 }
6035                                 s390_br   (code, s390_r1);
6036                         } else {
6037                                 if (fail_tramp) {
6038                                         gint64  target;
6039
6040                                         s390_basr (code, s390_r13, s390_r0);
6041                                         s390_j    (code, 6);
6042                                         s390_llong(code, item->key);
6043                                         s390_lg   (code, s390_r0, 0, s390_r13, 4);
6044                                         s390_cgr  (code, s390_r0, MONO_ARCH_IMT_REG);
6045                                         item->jmp_code = (guint8*) code;
6046                                         s390_jcl  (code, S390_CC_NE, 0);
6047                                         s390_basr (code, s390_r13, s390_r0);
6048                                         s390_j    (code, 6);
6049                                         if (item->has_target_code) {
6050                                                 s390_llong(code, item->value.target_code);
6051                                                 s390_lg   (code, s390_r1, 0, s390_r13, 4);
6052                                         } else {
6053                                                 g_assert (vtable);
6054                                                 s390_llong(code, (&(vtable->vtable [item->value.vtable_slot])));
6055                                                 s390_lg   (code, s390_r1, 0, s390_r13, 4);
6056                                                 s390_lg   (code, s390_r1, 0, s390_r1, 0);
6057                                         }
6058                                         s390_br   (code, s390_r1);
6059                                         target = S390_RELATIVE(code, item->jmp_code);
6060                                         s390_patch_rel(item->jmp_code+2, target);
6061                                         s390_basr (code, s390_r13, s390_r0);
6062                                         s390_j    (code, 6);
6063                                         s390_llong(code, fail_tramp);
6064                                         s390_lg   (code, s390_r1, 0, s390_r13, 4);
6065                                         s390_br   (code, s390_r1);
6066                                         item->jmp_code = NULL;
6067                                 } else {
6068                                 /* enable the commented code to assert on wrong method */
6069 #if ENABLE_WRONG_METHOD_CHECK
6070                                         g_assert_not_reached ();
6071 #endif
6072                                         s390_basr (code, s390_r13, s390_r0);
6073                                         s390_j    (code, 6);
6074                                         s390_llong(code, (&(vtable->vtable [item->value.vtable_slot])));
6075                                         s390_lg   (code, s390_r1, 0, s390_r13, 4);
6076                                         s390_lg   (code, s390_r1, 0, s390_r1, 0);
6077                                         s390_br   (code, s390_r1);
6078 #if ENABLE_WRONG_METHOD_CHECK
6079                                         g_assert_not_reached ();
6080 #endif
6081                                 }
6082                         }
6083                 } else {
6084                         s390_basr (code, s390_r13, s390_r0);
6085                         s390_j    (code, 6);
6086                         s390_llong(code, item->key);
6087                         s390_lg   (code, s390_r0, 0, s390_r13, 4);
6088                         s390_cgr  (code, MONO_ARCH_IMT_REG, s390_r0);
6089                         item->jmp_code = (guint8 *) code;
6090                         s390_jcl  (code, S390_CC_GE, 0);
6091                 }
6092         }
6093         /* patch the branches to get to the target items */
6094         for (i = 0; i < count; ++i) {
6095                 MonoIMTCheckItem *item = imt_entries [i];
6096                 if (item->jmp_code) {
6097                         if (item->check_target_idx) {
6098                                 gint64 offset;
6099                                 offset = S390_RELATIVE(imt_entries [item->check_target_idx]->code_target,
6100                                                        item->jmp_code);
6101                                 s390_patch_rel ((guchar *) item->jmp_code + 2, (guint64) offset);
6102                         }
6103                 }
6104         }
6105
6106         mono_arch_flush_icache ((guint8*)start, (code - start));
6107
6108         if (!fail_tramp)
6109                 mono_stats.imt_thunks_size += (code - start);
6110
6111         g_assert (code - start <= size);
6112
6113         return (start);
6114 }
6115
6116 /*========================= End of Function ========================*/
6117
6118 /*------------------------------------------------------------------*/
6119 /*                                                                  */
6120 /* Name         - mono_arch_find_imt_method.                        */
6121 /*                                                                  */
6122 /* Function     - Get the method address from MONO_ARCH_IMT_REG     */
6123 /*                found in the save area.                           */
6124 /*                                                                  */
6125 /*------------------------------------------------------------------*/
6126
6127 MonoMethod*
6128 mono_arch_find_imt_method (mgreg_t *regs, guint8 *code)
6129 {
6130         MonoLMF *lmf = (MonoLMF *) ((gchar *) regs - sizeof(MonoLMF));
6131
6132         return ((MonoMethod *) lmf->gregs [MONO_ARCH_IMT_REG]);
6133 }
6134
6135 /*========================= End of Function ========================*/
6136
6137 #ifdef MONO_ARCH_SOFT_DEBUG_SUPPORTED
6138
6139 /*------------------------------------------------------------------*/
6140 /*                                                                  */
6141 /* Name         - mono_arch_set_breakpoint.                         */
6142 /*                                                                  */
6143 /* Function     - Set a breakpoint at the native code corresponding */
6144 /*                to JI at NATIVE_OFFSET.  The location should      */
6145 /*                contain code emitted by OP_SEQ_POINT.             */
6146 /*                                                                  */
6147 /*------------------------------------------------------------------*/
6148
6149 void
6150 mono_arch_set_breakpoint (MonoJitInfo *ji, guint8 *ip)
6151 {
6152         guint8 *code = ip;
6153
6154         breakpointCode.pTrigger = bp_trigger_page;
6155         memcpy(code, (void *) &breakpointCode, BREAKPOINT_SIZE);
6156         code += BREAKPOINT_SIZE;
6157 }
6158
6159 /*========================= End of Function ========================*/
6160
6161 /*------------------------------------------------------------------*/
6162 /*                                                                  */
6163 /* Name         - mono_arch_clear_breakpoint.                       */
6164 /*                                                                  */
6165 /* Function     - Clear the breakpoint at IP.                       */
6166 /*                                                                  */
6167 /*------------------------------------------------------------------*/
6168
6169 void
6170 mono_arch_clear_breakpoint (MonoJitInfo *ji, guint8 *ip)
6171 {
6172         guint8 *code = ip;
6173         int i;
6174
6175         for (i = 0; i < (BREAKPOINT_SIZE / S390X_NOP_SIZE); i++)
6176                 s390_nop(code);
6177 }
6178
6179 /*========================= End of Function ========================*/
6180
6181 /*------------------------------------------------------------------*/
6182 /*                                                                  */
6183 /* Name         - mono_arch_is_breakpoint_event.                    */
6184 /*                                                                  */
6185 /* Function     -                                                   */
6186 /*                                                                  */
6187 /*------------------------------------------------------------------*/
6188
6189 gboolean
6190 mono_arch_is_breakpoint_event (void *info, void *sigctx)
6191 {
6192         siginfo_t* sinfo = (siginfo_t*) info;
6193         /* Sometimes the address is off by 4 */
6194         if (sinfo->si_addr >= bp_trigger_page && (guint8*)sinfo->si_addr <= (guint8*)bp_trigger_page + 128)
6195                 return TRUE;
6196         else
6197                 return FALSE;
6198 }
6199
6200 /*========================= End of Function ========================*/
6201
6202 /*------------------------------------------------------------------*/
6203 /*                                                                  */
6204 /* Name         - mono_arch_get_ip_for_breakpoint.                  */
6205 /*                                                                  */
6206 /* Function     - Convert the IP in the CTX to the address where a  */
6207 /*                breakpoint was placed.                            */
6208 /*                                                                  */
6209 /*------------------------------------------------------------------*/
6210
6211 guint8*
6212 mono_arch_get_ip_for_breakpoint (MonoJitInfo *ji, MonoContext *ctx)
6213 {
6214         guint8 *ip = MONO_CONTEXT_GET_IP (ctx);
6215
6216         /* ip points to the instruction causing the fault */
6217         ip -= BREAKPOINT_SIZE;
6218
6219         return ip;
6220 }
6221
6222 /*========================= End of Function ========================*/
6223
6224 /*------------------------------------------------------------------*/
6225 /*                                                                  */
6226 /* Name         - mono_arch_skip_breakpoint.                        */
6227 /*                                                                  */
6228 /* Function     - Modify the CTX so the IP is placed after the      */
6229 /*                breakpoint instruction, so when we resume, the    */
6230 /*                instruction is not executed again.                */
6231 /*                                                                  */
6232 /*------------------------------------------------------------------*/
6233
6234 void
6235 mono_arch_skip_breakpoint (MonoContext *ctx)
6236 {
6237         MONO_CONTEXT_SET_IP (ctx, (guint8*)MONO_CONTEXT_GET_IP (ctx) + BREAKPOINT_SIZE);
6238 }
6239
6240 /*========================= End of Function ========================*/
6241
6242 /*------------------------------------------------------------------*/
6243 /*                                                                  */
6244 /* Name         - mono_arch_start_single_stepping.                  */
6245 /*                                                                  */
6246 /* Function     - Start single stepping.                            */
6247 /*                                                                  */
6248 /*------------------------------------------------------------------*/
6249
6250 void
6251 mono_arch_start_single_stepping (void)
6252 {
6253         mono_mprotect (ss_trigger_page, mono_pagesize (), 0);
6254 }
6255
6256 /*========================= End of Function ========================*/
6257
6258 /*------------------------------------------------------------------*/
6259 /*                                                                  */
6260 /* Name         - mono_arch_stop_single_stepping.                   */
6261 /*                                                                  */
6262 /* Function     - Stop single stepping.                             */
6263 /*                                                                  */
6264 /*------------------------------------------------------------------*/
6265
6266 void
6267 mono_arch_stop_single_stepping (void)
6268 {
6269         mono_mprotect (ss_trigger_page, mono_pagesize (), MONO_MMAP_READ);
6270 }
6271
6272 /*========================= End of Function ========================*/
6273
6274 /*------------------------------------------------------------------*/
6275 /*                                                                  */
6276 /* Name         - mono_arch_is_single_step_event.                   */
6277 /*                                                                  */
6278 /* Function     - Return whether the machine state in sigctx cor-   */
6279 /*                responds to a single step event.                  */
6280 /*                                                                  */
6281 /*------------------------------------------------------------------*/
6282
6283 gboolean
6284 mono_arch_is_single_step_event (void *info, void *sigctx)
6285 {
6286         siginfo_t* sinfo = (siginfo_t*) info;
6287
6288         /* Sometimes the address is off by 4 */
6289         if (sinfo->si_addr >= ss_trigger_page && (guint8*)sinfo->si_addr <= (guint8*)ss_trigger_page + 128)
6290                 return TRUE;
6291         else
6292                 return FALSE;
6293 }
6294
6295 /*========================= End of Function ========================*/
6296
6297 /*------------------------------------------------------------------*/
6298 /*                                                                  */
6299 /* Name         - mono_arch_get_ip_for_single_step.                 */
6300 /*                                                                  */
6301 /* Function     - Convert the IP in ctx to the address stored in    */
6302 /*                seq_points.                                       */
6303 /*                                                                  */
6304 /*------------------------------------------------------------------*/
6305
6306 guint8*
6307 mono_arch_get_ip_for_single_step (MonoJitInfo *ji, MonoContext *ctx)
6308 {
6309         guint8 *ip = MONO_CONTEXT_GET_IP (ctx);
6310
6311         return ip;
6312 }
6313
6314 /*========================= End of Function ========================*/
6315
6316 /*------------------------------------------------------------------*/
6317 /*                                                                  */
6318 /* Name         - mono_arch_skip_single_step.                       */
6319 /*                                                                  */
6320 /* Function     - Modify the ctx so the IP is placed after the      */
6321 /*                single step trigger instruction, so that the      */
6322 /*                instruction is not executed again.                */
6323 /*                                                                  */
6324 /*------------------------------------------------------------------*/
6325
6326 void
6327 mono_arch_skip_single_step (MonoContext *ctx)
6328 {
6329         MONO_CONTEXT_SET_IP (ctx, (guint8*)MONO_CONTEXT_GET_IP (ctx) + BREAKPOINT_SIZE);
6330 }
6331
6332 /*========================= End of Function ========================*/
6333
6334 /*------------------------------------------------------------------*/
6335 /*                                                                  */
6336 /* Name         - mono_arch_create_seq_point_info.                  */
6337 /*                                                                  */
6338 /* Function     - Return a pointer to a data struction which is     */
6339 /*                used by the sequence point implementation in      */
6340 /*                AOTed code.                                       */
6341 /*                                                                  */
6342 /*------------------------------------------------------------------*/
6343
6344 gpointer
6345 mono_arch_get_seq_point_info (MonoDomain *domain, guint8 *code)
6346 {
6347         NOT_IMPLEMENTED;
6348         return NULL;
6349 }
6350
6351 /*========================= End of Function ========================*/
6352
6353 #endif