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(RR_Format)
 236
 237 #define MAX(a, b) ((a) > (b) ? (a) : (b))
 238
 239 /*
 240  * imt thunking size values
 241  */
 242 #define CMP_SIZE        24
 243 #define LOADCON_SIZE    20
 244 #define LOAD_SIZE       6
 245 #define BR_SIZE         2
 246 #define JUMP_SIZE       6
 247 #define ENABLE_WRONG_METHOD_CHECK 0
 248
 249 #define mono_mini_arch_lock() mono_mutex_lock (&mini_arch_mutex)
 250 #define mono_mini_arch_unlock() mono_mutex_unlock (&mini_arch_mutex)
 251
 252 /*========================= End of Defines =========================*/
 253
 254 /*------------------------------------------------------------------*/
 255 /*                 I n c l u d e s                                  */
 256 /*------------------------------------------------------------------*/
 257
 258 #include "mini.h"
 259 #include <string.h>
 260 #include <sys/types.h>
 261 #include <unistd.h>
 262
 263 #include <mono/metadata/abi-details.h>
 264 #include <mono/metadata/appdomain.h>
 265 #include <mono/metadata/debug-helpers.h>
 266 #include <mono/metadata/profiler-private.h>
 267 #include <mono/utils/mono-math.h>
 268 #include <mono/utils/mono-mmap.h>
 269 #include <mono/utils/mono-hwcap-s390x.h>
 270 #include <mono/utils/mono-threads.h>
 271
 272 #include "mini-s390x.h"
 273 #include "cpu-s390x.h"
 274 #include "support-s390x.h"
 275 #include "jit-icalls.h"
 276 #include "ir-emit.h"
 277 #include "trace.h"
 278
 279 /*========================= End of Includes ========================*/
 280
 281 /*------------------------------------------------------------------*/
 282 /*                 T y p e d e f s                                  */
 283 /*------------------------------------------------------------------*/
 284
 285 typedef struct {
 286         guint stack_size,
 287               local_size,
 288               code_size,
 289               parm_size,
 290               offset,
 291               offStruct,
 292               retStruct;
 293 } size_data;
 294
 295 /*------------------------------------------------------------------*/
 296 /* Used by the instrument_emit_epilog                               */
 297 /*------------------------------------------------------------------*/
 298
 299 enum {
 300         SAVE_NONE,
 301         SAVE_STRUCT,
 302         SAVE_ONE,
 303         SAVE_TWO,
 304         SAVE_R4,
 305         SAVE_R8
 306 };
 307
 308 typedef struct InstList InstList;
 309
 310 struct InstList {
 311         InstList *prev;
 312         InstList *next;
 313         MonoInst *data;
 314 };
 315
 316 typedef enum {
 317         RegTypeGeneral,
 318         RegTypeBase,
 319         RegTypeFP,
 320         RegTypeFPR4,
 321         RegTypeStructByVal,
 322         RegTypeStructByValInFP,
 323         RegTypeStructByAddr,
 324         RegTypeStructByAddrOnStack
 325 } ArgStorage;
 326
 327 typedef struct {
 328         gint32  offset;         /* offset from caller's stack */
 329         gint32  offparm;        /* offset from callee's stack */
 330         guint16 vtsize;         /* in param area */
 331         guint8  reg;
 332         ArgStorage regtype;
 333         guint32 size;           /* Size of structure used by RegTypeStructByVal */
 334         gint32  type;           /* Data type of argument */
 335 } ArgInfo;
 336
 337 typedef struct {
 338         int nargs;
 339         int lastgr;
 340         guint32 stack_usage;
 341         guint32 struct_ret;
 342         ArgInfo ret;
 343         ArgInfo sigCookie;
 344         size_data sz;
 345         int vret_arg_index;
 346         ArgInfo args [1];
 347 } CallInfo;
 348
 349 typedef struct {
 350         gint64  gr[5];          /* R2-R6                            */
 351         gdouble fp[3];          /* F0-F2                            */
 352 } __attribute__ ((packed)) RegParm;
 353
 354 typedef struct {
 355         RR_Format  basr;
 356         RI_Format  j;
 357         void       *pTrigger;
 358         RXY_Format lg;
 359         RXY_Format trigger;
 360 } __attribute__ ((packed)) breakpoint_t;
 361
 362 /*========================= End of Typedefs ========================*/
 363
 364 /*------------------------------------------------------------------*/
 365 /*                   P r o t o t y p e s                            */
 366 /*------------------------------------------------------------------*/
 367
 368 static void indent (int);
 369 static guint8 * backUpStackPtr(MonoCompile *, guint8 *);
 370 static void decodeParm (MonoType *, void *, int);
 371 static void enter_method (MonoMethod *, RegParm *, char *);
 372 static void leave_method (MonoMethod *, ...);
 373 static inline void add_general (guint *, size_data *, ArgInfo *);
 374 static inline void add_stackParm (guint *, size_data *, ArgInfo *, gint);
 375 static inline void add_float (guint *, size_data *, ArgInfo *);
 376 static CallInfo * get_call_info (MonoCompile *, MonoMemPool *, MonoMethodSignature *);
 377 static guchar * emit_float_to_int (MonoCompile *, guchar *, int, int, int, gboolean);
 378 static guint8 * emit_load_volatile_arguments (guint8 *, MonoCompile *);
 379 static __inline__ void emit_unwind_regs(MonoCompile *, guint8 *, int, int, long);
 380
 381 /*========================= End of Prototypes ======================*/
 382
 383 /*------------------------------------------------------------------*/
 384 /*                 G l o b a l   V a r i a b l e s                  */
 385 /*------------------------------------------------------------------*/
 386
 387 int mono_exc_esp_offset = 0;
 388
 389 __thread int indent_level = 0;
 390
 391 static gint appdomain_tls_offset = -1,
 392             lmf_tls_offset = -1,
 393             lmf_addr_tls_offset = -1;
 394
 395 pthread_key_t lmf_addr_key;
 396
 397 gboolean lmf_addr_key_inited = FALSE;
 398
 399 facilityList_t facs;
 400
 401 /*
 402  * The code generated for sequence points reads from this location,
 403  * which is made read-only when single stepping is enabled.
 404  */
 405 static gpointer ss_trigger_page;
 406
 407 /*
 408  * Enabled breakpoints read from this trigger page
 409  */
 410 static gpointer bp_trigger_page;
 411
 412 breakpoint_t breakpointCode;
 413
 414 static mono_mutex_t mini_arch_mutex;
 415
 416 /*====================== End of Global Variables ===================*/
 417
 418 /*------------------------------------------------------------------*/
 419 /*                                                                  */
 420 /* Name         - mono_arch_regname                                 */
 421 /*                                                                  */
 422 /* Function     - Returns the name of the register specified by     */
 423 /*                the input parameter.                              */
 424 /*                                                                  */
 425 /*------------------------------------------------------------------*/
 426
 427 const char*
 428 mono_arch_regname (int reg) {
 429         static const char * rnames[] = {
 430                 "s390_r0", "s390_sp", "s390_r2", "s390_r3", "s390_r4",
 431                 "s390_r5", "s390_r6", "s390_r7", "s390_r8", "s390_r9",
 432                 "s390_r10", "s390_r11", "s390_r12", "s390_r13", "s390_r14",
 433                 "s390_r15"
 434         };
 435
 436         if (reg >= 0 && reg < 16)
 437                 return rnames [reg];
 438         else
 439                 return "unknown";
 440 }
 441
 442 /*========================= End of Function ========================*/
 443
 444 /*------------------------------------------------------------------*/
 445 /*                                                                  */
 446 /* Name         - mono_arch_fregname                                */
 447 /*                                                                  */
 448 /* Function     - Returns the name of the register specified by     */
 449 /*                the input parameter.                              */
 450 /*                                                                  */
 451 /*------------------------------------------------------------------*/
 452
 453 const char*
 454 mono_arch_fregname (int reg) {
 455         static const char * rnames[] = {
 456                 "s390_f0", "s390_f1", "s390_f2", "s390_f3", "s390_f4",
 457                 "s390_f5", "s390_f6", "s390_f7", "s390_f8", "s390_f9",
 458                 "s390_f10", "s390_f11", "s390_f12", "s390_f13", "s390_f14",
 459                 "s390_f15"
 460         };
 461
 462         if (reg >= 0 && reg < 16)
 463                 return rnames [reg];
 464         else
 465                 return "unknown";
 466 }
 467
 468 /*========================= End of Function ========================*/
 469
 470 /*------------------------------------------------------------------*/
 471 /*                                                                  */
 472 /* Name         - arch_get_argument_info                            */
 473 /*                                                                  */
 474 /* Function     - Gathers information on parameters such as size,   */
 475 /*                alignment, and padding. arg_info should be large  */
 476 /*                enough to hold param_count + 1 entries.           */
 477 /*                                                                  */
 478 /* Parameters   - @csig - Method signature                          */
 479 /*                @param_count - No. of parameters to consider      */
 480 /*                @arg_info - An array to store the result info     */
 481 /*                                                                  */
 482 /* Returns      - Size of the activation frame                      */
 483 /*                                                                  */
 484 /*------------------------------------------------------------------*/
 485
 486 int
 487 mono_arch_get_argument_info (MonoGenericSharingContext *gsctx, MonoMethodSignature *csig,
 488                              int param_count,
 489                              MonoJitArgumentInfo *arg_info)
 490 {
 491         int k, frame_size = 0;
 492         int size, align, pad;
 493         int offset = 8;
 494
 495         if (MONO_TYPE_ISSTRUCT (csig->ret)) {
 496                 frame_size += sizeof (gpointer);
 497                 offset += 8;
 498         }
 499
 500         arg_info [0].offset = offset;
 501
 502         if (csig->hasthis) {
 503                 frame_size += sizeof (gpointer);
 504                 offset += 8;
 505         }
 506
 507         arg_info [0].size = frame_size;
 508
 509         for (k = 0; k < param_count; k++) {
 510
 511                 if (csig->pinvoke)
 512                         size = mono_type_native_stack_size (csig->params [k], (guint32 *) &align);
 513                 else
 514                         size = mini_type_stack_size (NULL, csig->params [k], &align);
 515
 516                 frame_size += pad = (align - (frame_size & (align - 1))) & (align - 1);
 517                 arg_info [k].pad = pad;
 518                 frame_size += size;
 519                 arg_info [k + 1].pad = 0;
 520                 arg_info [k + 1].size = size;
 521                 offset += pad;
 522                 arg_info [k + 1].offset = offset;
 523                 offset += size;
 524         }
 525
 526         align = MONO_ARCH_FRAME_ALIGNMENT;
 527         frame_size += pad = (align - (frame_size & (align - 1))) & (align - 1);
 528         arg_info [k].pad = pad;
 529
 530         return frame_size;
 531 }
 532
 533 /*========================= End of Function ========================*/
 534
 535 /*------------------------------------------------------------------*/
 536 /*                                                                  */
 537 /* Name         - emit_unwind_regs.                                 */
 538 /*                                                                  */
 539 /* Function     - Determines if a value can be returned in one or   */
 540 /*                two registers.                                    */
 541 /*                                                                  */
 542 /*------------------------------------------------------------------*/
 543
 544 static void __inline__
 545 emit_unwind_regs(MonoCompile *cfg, guint8 *code, int start, int end, long offset)
 546 {
 547         int i;
 548
 549         for (i = start; i < end; i++) {
 550                 mono_emit_unwind_op_offset (cfg, code, i, offset);
 551                 offset += sizeof(gulong);
 552         }
 553 }
 554
 555 /*========================= End of Function ========================*/
 556
 557 /*------------------------------------------------------------------*/
 558 /*                                                                  */
 559 /* Name         - retFitsInReg.                                     */
 560 /*                                                                  */
 561 /* Function     - Determines if a value can be returned in one or   */
 562 /*                two registers.                                    */
 563 /*                                                                  */
 564 /*------------------------------------------------------------------*/
 565
 566 static inline gboolean
 567 retFitsInReg(guint32 size)
 568 {
 569         switch (size) {
 570                 case 0:
 571                 case 1:
 572                 case 2:
 573                 case 4:
 574                 case 8:
 575                         return (TRUE);
 576                 break;
 577                 default:
 578                         return (FALSE);
 579         }
 580 }
 581
 582 /*========================= End of Function ========================*/
 583
 584 /*------------------------------------------------------------------*/
 585 /*                                                                  */
 586 /* Name         - backStackPtr.                                     */
 587 /*                                                                  */
 588 /* Function     - Restore Stack Pointer to previous frame.          */
 589 /*                                                                  */
 590 /*------------------------------------------------------------------*/
 591
 592 static inline guint8 *
 593 backUpStackPtr(MonoCompile *cfg, guint8 *code)
 594 {
 595         int stackSize = cfg->stack_usage;
 596
 597         if (cfg->frame_reg != STK_BASE)
 598                 s390_lgr (code, STK_BASE, cfg->frame_reg);
 599
 600         if (s390_is_imm16 (stackSize)) {
 601                 s390_aghi  (code, STK_BASE, stackSize);
 602         } else {
 603                 while (stackSize > 32767) {
 604                         s390_aghi  (code, STK_BASE, 32767);
 605                         stackSize -= 32767;
 606                 }
 607                 s390_aghi  (code, STK_BASE, stackSize);
 608         }
 609         return (code);
 610 }
 611
 612 /*========================= End of Function ========================*/
 613
 614 /*------------------------------------------------------------------*/
 615 /*                                                                  */
 616 /* Name         - indent                                            */
 617 /*                                                                  */
 618 /* Function     - Perform nice indenting to current level           */
 619 /*                                                                  */
 620 /*------------------------------------------------------------------*/
 621
 622 static void
 623 indent (int diff) {
 624         int v;
 625         if (diff < 0)
 626                 indent_level += diff;
 627         v = indent_level;
 628         printf("%p [%3d] ",(void *)pthread_self(),v);
 629         while (v-- > 0) {
 630                 printf (". ");
 631         }
 632         if (diff > 0)
 633                 indent_level += diff;
 634 }
 635
 636 /*========================= End of Function ========================*/
 637
 638 /*------------------------------------------------------------------*/
 639 /*                                                                  */
 640 /* Name         - cvtMonoType                                       */
 641 /*                                                                  */
 642 /* Function     - Convert a mono-type to a string.                  */
 643 /*                                                                  */
 644 /*------------------------------------------------------------------*/
 645
 646 static const char *
 647 cvtMonoType(MonoTypeEnum t)
 648 {
 649   switch(t)
 650     {
 651     case MONO_TYPE_END:
 652       return "MONO_TYPE_END";
 653     case MONO_TYPE_VOID:
 654       return "MONO_TYPE_VOID";
 655     case MONO_TYPE_BOOLEAN:
 656       return "MONO_TYPE_BOOLEAN";
 657     case MONO_TYPE_CHAR:
 658       return "MONO_TYPE_CHAR";
 659     case MONO_TYPE_I1:
 660       return "MONO_TYPE_I1";
 661     case MONO_TYPE_U1:
 662       return "MONO_TYPE_U1";
 663     case MONO_TYPE_I2:
 664       return "MONO_TYPE_I2";
 665     case MONO_TYPE_U2:
 666       return "MONO_TYPE_U2";
 667     case MONO_TYPE_I4:
 668       return "MONO_TYPE_I4";
 669     case MONO_TYPE_U4:
 670       return "MONO_TYPE_U4";
 671     case MONO_TYPE_I8:
 672       return "MONO_TYPE_I8";
 673     case MONO_TYPE_U8:
 674       return "MONO_TYPE_U8";
 675     case MONO_TYPE_R4:
 676       return "MONO_TYPE_R4";
 677     case MONO_TYPE_R8:
 678       return "MONO_TYPE_R8";
 679     case MONO_TYPE_STRING:
 680       return "MONO_TYPE_STRING";
 681     case MONO_TYPE_PTR:
 682       return "MONO_TYPE_PTR";
 683     case MONO_TYPE_BYREF:
 684       return "MONO_TYPE_BYREF";
 685     case MONO_TYPE_VALUETYPE:
 686       return "MONO_TYPE_VALUETYPE";
 687     case MONO_TYPE_CLASS:
 688       return "MONO_TYPE_CLASS";
 689     case MONO_TYPE_VAR:
 690       return "MONO_TYPE_VAR";
 691     case MONO_TYPE_ARRAY:
 692       return "MONO_TYPE_ARRAY";
 693     case MONO_TYPE_GENERICINST:
 694       return "MONO_TYPE_GENERICINST";
 695     case MONO_TYPE_TYPEDBYREF:
 696       return "MONO_TYPE_TYPEDBYREF";
 697     case MONO_TYPE_I:
 698       return "MONO_TYPE_I";
 699     case MONO_TYPE_U:
 700       return "MONO_TYPE_U";
 701     case MONO_TYPE_FNPTR:
 702       return "MONO_TYPE_FNPTR";
 703     case MONO_TYPE_OBJECT:
 704       return "MONO_TYPE_OBJECT";
 705     case MONO_TYPE_SZARRAY:
 706       return "MONO_TYPE_SZARRAY";
 707     case MONO_TYPE_MVAR:
 708       return "MONO_TYPE_MVAR";
 709     case MONO_TYPE_CMOD_REQD:
 710       return "MONO_TYPE_CMOD_REQD";
 711     case MONO_TYPE_CMOD_OPT:
 712       return "MONO_TYPE_CMOD_OPT";
 713     case MONO_TYPE_INTERNAL:
 714       return "MONO_TYPE_INTERNAL";
 715     case MONO_TYPE_MODIFIER:
 716       return "MONO_TYPE_MODIFIER";
 717     case MONO_TYPE_SENTINEL:
 718       return "MONO_TYPE_SENTINEL";
 719     case MONO_TYPE_PINNED:
 720       return "MONO_TYPE_PINNED";
 721     default:
 722       ;
 723     }
 724   return "unknown";
 725 }
 726
 727 /*========================= End of Function ========================*/
 728
 729 /*------------------------------------------------------------------*/
 730 /*                                                                  */
 731 /* Name         - decodeParm                                        */
 732 /*                                                                  */
 733 /* Function     - Decode a parameter for the trace.                 */
 734 /*                                                                  */
 735 /*------------------------------------------------------------------*/
 736
 737 static void
 738 decodeParm(MonoType *type, void *curParm, int size)
 739 {
 740         guint32 simpleType;
 741
 742         if (type->byref) {
 743                 printf("[BYREF:%p], ", *((char **) curParm));
 744         } else {
 745                 simpleType = mono_type_get_underlying_type(type)->type;
 746 enum_parmtype:
 747                 switch (simpleType) {
 748                         case MONO_TYPE_I :
 749                                 printf ("[INTPTR:%p], ", *((int **) curParm));
 750                                 break;
 751                         case MONO_TYPE_U :
 752                                 printf ("[UINTPTR:%p], ", *((int **) curParm));
 753                                 break;
 754                         case MONO_TYPE_BOOLEAN :
 755                                 printf ("[BOOL:%ld], ", *((gint64 *) curParm));
 756                                 break;
 757                         case MONO_TYPE_CHAR :
 758                                 printf ("[CHAR:%c], ", *((int  *) curParm));
 759                                 break;
 760                         case MONO_TYPE_I1 :
 761                                 printf ("[INT1:%ld], ", *((gint64 *) curParm));
 762                                 break;
 763                         case MONO_TYPE_I2 :
 764                                 printf ("[INT2:%ld], ", *((gint64 *) curParm));
 765                                 break;
 766                         case MONO_TYPE_I4 :
 767                                 printf ("[INT4:%ld], ", *((gint64 *) curParm));
 768                                 break;
 769                         case MONO_TYPE_U1 :
 770                                 printf ("[UINT1:%lu], ", *((guint64 *) curParm));
 771                                 break;
 772                         case MONO_TYPE_U2 :
 773                                 printf ("[UINT2:%lu], ", *((guint64 *) curParm));
 774                                 break;
 775                         case MONO_TYPE_U4 :
 776                                 printf ("[UINT4:%lu], ", *((guint64 *) curParm));
 777                                 break;
 778                         case MONO_TYPE_U8 :
 779                                 printf ("[UINT8:%lu], ", *((guint64 *) curParm));
 780                                 break;
 781                         case MONO_TYPE_STRING : {
 782                                 MonoString *s = *((MonoString **) curParm);
 783                                 if (s) {
 784                                         g_assert (((MonoObject *) s)->vtable->klass == mono_defaults.string_class);
 785                                         printf("[STRING:%p:%s], ", s, mono_string_to_utf8(s));
 786                                 } else {
 787                                         printf("[STRING:null], ");
 788                                 }
 789                                 break;
 790                         }
 791                         case MONO_TYPE_CLASS :
 792                         case MONO_TYPE_OBJECT : {
 793                                 MonoObject *obj = *((MonoObject **) curParm);
 794                                 MonoClass *class;
 795                                 if ((obj) && (obj->vtable)) {
 796                                         printf("[CLASS/OBJ:");
 797                                         class = obj->vtable->klass;
 798                                         printf("%p [%p] ",obj,curParm);
 799                                         if (class == mono_defaults.string_class) {
 800                                                 printf("[STRING:%p:%s]",
 801                                                        obj, mono_string_to_utf8 ((MonoString *) obj));
 802                                         } else if (class == mono_defaults.int32_class) {
 803                                                 printf("[INT32:%p:%d]",
 804                                                         obj, *(gint32 *)((char *)obj + sizeof (MonoObject)));
 805                                         } else
 806                                                 printf("[%s.%s:%p]",
 807                                                        class->name_space, class->name, obj);
 808                                         printf("], ");
 809                                 } else {
 810                                         printf("[OBJECT:null], ");
 811                                 }
 812                                 break;
 813                         }
 814                         case MONO_TYPE_PTR :
 815                                 printf("[PTR:%p], ", *((gpointer **) (curParm)));
 816                                 break;
 817                         case MONO_TYPE_FNPTR :
 818                                 printf("[FNPTR:%p], ", *((gpointer **) (curParm)));
 819                                 break;
 820                         case MONO_TYPE_ARRAY :
 821                                 printf("[ARRAY:%p], ", *((gpointer **) (curParm)));
 822                                 break;
 823                         case MONO_TYPE_SZARRAY :
 824                                 printf("[SZARRAY:%p], ", *((gpointer **) (curParm)));
 825                                 break;
 826                         case MONO_TYPE_I8 :
 827                                 printf("[INT8:%ld], ", *((gint64 *) (curParm)));
 828                                 break;
 829                         case MONO_TYPE_R4 :
 830                                 printf("[FLOAT4:%g], ", *((float *) (curParm)));
 831                                 break;
 832                         case MONO_TYPE_R8 :
 833                                 printf("[FLOAT8:%g], ", *((double *) (curParm)));
 834                                 break;
 835                         case MONO_TYPE_VALUETYPE : {
 836                                 int i;
 837                                 MonoMarshalType *info;
 838
 839                                 if (type->data.klass->enumtype) {
 840                                         simpleType = mono_class_enum_basetype (type->data.klass)->type;
 841                                         printf("{VALUETYPE} - ");
 842                                         goto enum_parmtype;
 843                                 }
 844
 845                                 info = mono_marshal_load_type_info (type->data.klass);
 846
 847                                 if ((info->native_size == sizeof(float)) &&
 848                                     (info->num_fields  == 1) &&
 849                                     (info->fields[0].field->type->type == MONO_TYPE_R4)) {
 850                                                 printf("[FLOAT4:%f], ", *((float *) (curParm)));
 851                                         break;
 852                                 }
 853
 854                                 if ((info->native_size == sizeof(double)) &&
 855                                     (info->num_fields  == 1) &&
 856                                     (info->fields[0].field->type->type == MONO_TYPE_R8)) {
 857                                         printf("[FLOAT8:%g], ", *((double *) (curParm)));
 858                                         break;
 859                                 }
 860
 861                                 printf("[VALUETYPE:");
 862                                 for (i = 0; i < size; i++)
 863                                         printf("%02x,", *((guint8 *)curParm+i));
 864                                 printf("], ");
 865                                 break;
 866                         }
 867                         case MONO_TYPE_TYPEDBYREF: {
 868                                 int i;
 869                                 printf("[TYPEDBYREF:");
 870                                 for (i = 0; i < size; i++)
 871                                         printf("%02x,", *((guint8 *)curParm+i));
 872                                 printf("]");
 873                                 break;
 874                         }
 875                         default :
 876                                 printf("[%s], ",cvtMonoType(simpleType));
 877                 }
 878         }
 879 }
 880
 881 /*========================= End of Function ========================*/
 882
 883 /*------------------------------------------------------------------*/
 884 /*                                                                  */
 885 /* Name         - enter_method                                      */
 886 /*                                                                  */
 887 /* Function     - Perform tracing of the entry to the current       */
 888 /*                method.                                           */
 889 /*                                                                  */
 890 /*------------------------------------------------------------------*/
 891
 892 static void
 893 enter_method (MonoMethod *method, RegParm *rParm, char *sp)
 894 {
 895         int i, oParm = 0, iParm = 0;
 896         MonoClass *class;
 897         MonoObject *obj;
 898         MonoMethodSignature *sig;
 899         char *fname;
 900         guint64 ip;
 901         CallInfo *cinfo;
 902         ArgInfo *ainfo;
 903         void *curParm;
 904
 905         fname = mono_method_full_name (method, TRUE);
 906         indent (1);
 907         printf ("ENTER: %s ", fname);
 908         g_free (fname);
 909
 910         ip  = (*(guint64 *) (sp+S390_RET_ADDR_OFFSET));
 911         printf ("ip: %p sp: %p - ", (gpointer) ip, sp);
 912
 913         if (rParm == NULL)
 914                 return;
 915
 916         sig = mono_method_signature (method);
 917
 918         cinfo = get_call_info (NULL, NULL, sig);
 919
 920         if (cinfo->struct_ret) {
 921                 printf ("[STRUCTRET:%p], ", (gpointer) rParm->gr[0]);
 922                 iParm = 1;
 923         }
 924
 925         if (sig->hasthis) {
 926                 gpointer *this = (gpointer *) rParm->gr[iParm];
 927                 obj = (MonoObject *) this;
 928                 switch(method->klass->this_arg.type) {
 929                 case MONO_TYPE_VALUETYPE:
 930                         if (obj) {
 931                                 guint64 *value = (guint64 *) ((uintptr_t)this + sizeof(MonoObject));
 932                                 printf("this:[value:%p:%016lx], ", this, *value);
 933                         } else
 934                                 printf ("this:[NULL], ");
 935                         break;
 936                 case MONO_TYPE_STRING:
 937                         if (obj) {
 938                                 if (obj->vtable) {
 939                                         class = obj->vtable->klass;
 940                                         if (class == mono_defaults.string_class) {
 941                                                 printf ("this:[STRING:%p:%s], ",
 942                                                         obj, mono_string_to_utf8 ((MonoString *)obj));
 943                                         } else {
 944                                                 printf ("this:%p[%s.%s], ",
 945                                                         obj, class->name_space, class->name);
 946                                         }
 947                                 } else
 948                                         printf("vtable:[NULL], ");
 949                         } else
 950                                 printf ("this:[NULL], ");
 951                         break;
 952                 default :
 953                         printf("this[%s]: %p, ",cvtMonoType(method->klass->this_arg.type),this);
 954                 }
 955                 oParm++;
 956         }
 957
 958         for (i = 0; i < sig->param_count; ++i) {
 959                 ainfo = &cinfo->args[i + oParm];
 960                 switch (ainfo->regtype) {
 961                         case RegTypeGeneral :
 962                                 decodeParm(sig->params[i], &(rParm->gr[ainfo->reg-2]), ainfo->size);
 963                                 break;
 964                         case RegTypeFP :
 965                                 decodeParm(sig->params[i], &(rParm->fp[ainfo->reg]), ainfo->size);
 966                                 break;
 967                         case RegTypeBase :
 968                                 decodeParm(sig->params[i], sp+ainfo->offset, ainfo->size);
 969                                 break;
 970                         case RegTypeStructByVal :
 971                                 if (ainfo->reg != STK_BASE) {
 972                                         int offset = sizeof(glong) - ainfo->size;
 973                                         curParm = &(rParm->gr[ainfo->reg-2])+offset;
 974                                 }
 975                                 else
 976                                         curParm = sp+ainfo->offset;
 977
 978                                 if (retFitsInReg (ainfo->vtsize))
 979                                         decodeParm(sig->params[i],
 980                                                    curParm,
 981                                                    ainfo->size);
 982                                 else
 983                                         decodeParm(sig->params[i],
 984                                                    *((char **) curParm),
 985                                                    ainfo->vtsize);
 986                                 break;
 987                         case RegTypeStructByAddr :
 988                                 if (ainfo->reg != STK_BASE)
 989                                         curParm = &(rParm->gr[ainfo->reg-2]);
 990                                 else
 991                                         curParm = sp+ainfo->offset;
 992
 993                                 decodeParm(sig->params[i],
 994                                            *((char **) curParm),
 995                                            ainfo->vtsize);
 996                                 break;
 997
 998                         default :
 999                                 printf("???, ");
1000                 }
1001         }
1002         printf("\n");
1003         g_free(cinfo);
1004 }
1005
1006 /*========================= End of Function ========================*/
1007
1008 /*------------------------------------------------------------------*/
1009 /*                                                                  */
1010 /* Name         - leave_method                                      */
1011 /*                                                                  */
1012 /* Function     -                                                   */
1013 /*                                                                  */
1014 /*------------------------------------------------------------------*/
1015
1016 static void
1017 leave_method (MonoMethod *method, ...)
1018 {
1019         MonoType *type;
1020         char *fname;
1021         guint64 ip;
1022         va_list ap;
1023
1024         va_start(ap, method);
1025
1026         fname = mono_method_full_name (method, TRUE);
1027         indent (-1);
1028         printf ("LEAVE: %s", fname);
1029         g_free (fname);
1030
1031         type = mono_method_signature (method)->ret;
1032
1033 handle_enum:
1034         switch (type->type) {
1035         case MONO_TYPE_VOID:
1036                 break;
1037         case MONO_TYPE_BOOLEAN: {
1038                 int val = va_arg (ap, int);
1039                 if (val)
1040                         printf ("[TRUE:%d]", val);
1041                 else
1042                         printf ("[FALSE]");
1043
1044                 break;
1045         }
1046         case MONO_TYPE_CHAR: {
1047                 int val = va_arg (ap, int);
1048                 printf ("[CHAR:%d]", val);
1049                 break;
1050         }
1051         case MONO_TYPE_I1: {
1052                 int val = va_arg (ap, int);
1053                 printf ("[INT1:%d]", val);
1054                 break;
1055         }
1056         case MONO_TYPE_U1: {
1057                 int val = va_arg (ap, int);
1058                 printf ("[UINT1:%d]", val);
1059                 break;
1060         }
1061         case MONO_TYPE_I2: {
1062                 int val = va_arg (ap, int);
1063                 printf ("[INT2:%d]", val);
1064                 break;
1065         }
1066         case MONO_TYPE_U2: {
1067                 int val = va_arg (ap, int);
1068                 printf ("[UINT2:%d]", val);
1069                 break;
1070         }
1071         case MONO_TYPE_I4: {
1072                 int val = va_arg (ap, int);
1073                 printf ("[INT4:%d]", val);
1074                 break;
1075         }
1076         case MONO_TYPE_U4: {
1077                 int val = va_arg (ap, int);
1078                 printf ("[UINT4:%d]", val);
1079                 break;
1080         }
1081         case MONO_TYPE_I: {
1082                 gint64 val = va_arg (ap, gint64);
1083                 printf ("[INT:%ld]", val);
1084                 printf("]");
1085                 break;
1086         }
1087         case MONO_TYPE_U: {
1088                 gint64 val = va_arg (ap, gint64);
1089                 printf ("[UINT:%lu]", val);
1090                 printf("]");
1091                 break;
1092         }
1093         case MONO_TYPE_STRING: {
1094                 MonoString *s = va_arg (ap, MonoString *);
1095 ;
1096                 if (s) {
1097                         g_assert (((MonoObject *)s)->vtable->klass == mono_defaults.string_class);
1098                         printf ("[STRING:%p:%s]", s, mono_string_to_utf8 (s));
1099                 } else
1100                         printf ("[STRING:null], ");
1101                 break;
1102         }
1103         case MONO_TYPE_CLASS:
1104         case MONO_TYPE_OBJECT: {
1105                 MonoObject *o = va_arg (ap, MonoObject *);
1106
1107                 if ((o) && (o->vtable)) {
1108                         if (o->vtable->klass == mono_defaults.boolean_class) {
1109                                 printf ("[BOOLEAN:%p:%d]", o, *((guint8 *)o + sizeof (MonoObject)));
1110                         } else if  (o->vtable->klass == mono_defaults.int32_class) {
1111                                 printf ("[INT32:%p:%d]", o, *((gint32 *)((char *)o + sizeof (MonoObject))));
1112                         } else if  (o->vtable->klass == mono_defaults.int64_class) {
1113                                 printf ("[INT64:%p:%ld]", o, *((gint64 *)((char *)o + sizeof (MonoObject))));
1114                         } else
1115                                 printf ("[%s.%s:%p]", o->vtable->klass->name_space, o->vtable->klass->name, o);
1116                 } else
1117                         printf ("[OBJECT:%p]", o);
1118
1119                 break;
1120         }
1121         case MONO_TYPE_PTR:
1122         case MONO_TYPE_FNPTR:
1123         case MONO_TYPE_ARRAY:
1124         case MONO_TYPE_SZARRAY: {
1125                 gpointer p = va_arg (ap, gpointer);
1126                 printf ("[result=%p]", p);
1127                 break;
1128         }
1129         case MONO_TYPE_I8: {
1130                 gint64 l =  va_arg (ap, gint64);
1131                 printf ("[LONG:%ld]", l);
1132                 break;
1133         }
1134         case MONO_TYPE_U8: {
1135                 guint64 l =  va_arg (ap, guint64);
1136                 printf ("[ULONG:%lu]", l);
1137                 break;
1138         }
1139         case MONO_TYPE_R4: {
1140                 double f = va_arg (ap, double);
1141                 printf ("[FLOAT4:%g]\n", f);
1142                 break;
1143         }
1144         case MONO_TYPE_R8: {
1145                 double f = va_arg (ap, double);
1146                 printf ("[FLOAT8:%g]\n", f);
1147                 break;
1148         }
1149         case MONO_TYPE_VALUETYPE: {
1150                 MonoMarshalType *info;
1151                 if (type->data.klass->enumtype) {
1152                         type = mono_class_enum_basetype (type->data.klass);
1153                         goto handle_enum;
1154                 } else {
1155                         int size, align;
1156
1157                         info = mono_marshal_load_type_info (type->data.klass);
1158
1159                         if ((info->native_size == sizeof(float)) &&
1160                             (info->num_fields  == 1) &&
1161                             (info->fields[0].field->type->type == MONO_TYPE_R4)) {
1162                                 double f = va_arg (ap, double);
1163                                 printf("[FLOAT4:%g]\n", (double) f);
1164                                 break;
1165                         }
1166
1167                         if ((info->native_size == sizeof(double)) &&
1168                             (info->num_fields  == 1) &&
1169                             (info->fields[0].field->type->type == MONO_TYPE_R8)) {
1170                                 double f = va_arg (ap, double);
1171                                 printf("[FLOAT8:%g]\n", f);
1172                                 break;
1173                         }
1174
1175                         size = mono_type_size (type, &align);
1176                         switch (size) {
1177                                 case 1: {
1178                                         guint32 p = va_arg (ap, guint32);
1179                                         printf ("[%02x]\n",p);
1180                                         break;
1181                                 }
1182                                 case 2: {
1183                                         guint32 p = va_arg (ap, guint32);
1184                                         printf ("[%04x]\n",p);
1185                                         break;
1186                                 }
1187                                 case 4: {
1188                                         guint32 p = va_arg (ap, guint32);
1189                                         printf ("[%08x]\n",p);
1190                                         break;
1191                                 }
1192                                 case 8: {
1193                                         guint64 p = va_arg (ap, guint64);
1194                                         printf ("[%016lx]\n",p);
1195                                         break;
1196                                 }
1197                                 default: {
1198                                         gpointer p = va_arg (ap, gpointer);
1199                                         printf ("[VALUETYPE] %p\n",p);
1200                                 }
1201                         }
1202                 }
1203                 break;
1204         }
1205         case MONO_TYPE_TYPEDBYREF: {
1206                 guint8 *p = va_arg (ap, gpointer);
1207                 int j, size, align;
1208                 size = mono_type_size (type, &align);
1209                 switch (size) {
1210                 case 1:
1211                 case 2:
1212                 case 4:
1213                 case 8:
1214                         printf ("[");
1215                         for (j = 0; p && j < size; j++)
1216                                 printf ("%02x,", p [j]);
1217                         printf ("]\n");
1218                         break;
1219                 default:
1220                         printf ("[TYPEDBYREF]\n");
1221                 }
1222         }
1223                 break;
1224         case MONO_TYPE_GENERICINST: {
1225                 printf("[GENERICINST]\n");
1226         }
1227                 break;
1228         case MONO_TYPE_MVAR: {
1229                 printf("[MVAR]\n");
1230         }
1231                 break;
1232         case MONO_TYPE_CMOD_REQD: {
1233                 printf("[CMOD_REQD]\n");
1234         }
1235                 break;
1236         case MONO_TYPE_CMOD_OPT: {
1237                 printf("[CMOD_OPT]\n");
1238         }
1239                 break;
1240         case MONO_TYPE_INTERNAL: {
1241                 printf("[INTERNAL]\n");
1242         }
1243                 break;
1244         default:
1245                 printf ("(unknown return type %x)",
1246                         mono_method_signature (method)->ret->type);
1247         }
1248
1249         ip = ((gint64) __builtin_extract_return_addr (__builtin_return_address (0)));
1250         printf (" ip: %p\n", (gpointer) ip);
1251 }
1252
1253 /*========================= End of Function ========================*/
1254
1255 /*------------------------------------------------------------------*/
1256 /*                                                                  */
1257 /* Name         - mono_arch_cpu_init                                */
1258 /*                                                                  */
1259 /* Function     - Perform CPU specific initialization to execute    */
1260 /*                managed code.                                     */
1261 /*                                                                  */
1262 /*------------------------------------------------------------------*/
1263
1264 void
1265 mono_arch_cpu_init (void)
1266 {
1267 }
1268
1269 /*========================= End of Function ========================*/
1270
1271 /*------------------------------------------------------------------*/
1272 /*                                                                  */
1273 /* Name         - mono_arch_init.                                   */
1274 /*                                                                  */
1275 /* Function     - Initialize architecture specific code.            */
1276 /*                                                                  */
1277 /*------------------------------------------------------------------*/
1278
1279 void
1280 mono_arch_init (void)
1281 {
1282         guint8 *code;
1283
1284         mono_mutex_init_recursive (&mini_arch_mutex);
1285
1286         ss_trigger_page = mono_valloc (NULL, mono_pagesize (), MONO_MMAP_READ);
1287         bp_trigger_page = mono_valloc (NULL, mono_pagesize (), MONO_MMAP_READ);
1288         mono_mprotect (bp_trigger_page, mono_pagesize (), 0);
1289
1290         code = (guint8 *) &breakpointCode;
1291         s390_basr(code, s390_r13, 0);
1292         s390_j(code, 6);
1293         s390_llong(code, 0);
1294         s390_lg(code, s390_r13, 0, s390_r13, 4);
1295         s390_lg(code, s390_r0, 0, s390_r13, 0);
1296 }
1297
1298 /*========================= End of Function ========================*/
1299
1300 /*------------------------------------------------------------------*/
1301 /*                                                                  */
1302 /* Name         - mono_arch_cleanup.                                */
1303 /*                                                                  */
1304 /* Function     - Cleanup architecture specific code    .           */
1305 /*                                                                  */
1306 /*------------------------------------------------------------------*/
1307
1308 void
1309 mono_arch_cleanup (void)
1310 {
1311         if (ss_trigger_page)
1312                 mono_vfree (ss_trigger_page, mono_pagesize ());
1313         if (bp_trigger_page)
1314                 mono_vfree (bp_trigger_page, mono_pagesize ());
1315         mono_mutex_destroy (&mini_arch_mutex);
1316 }
1317
1318 /*========================= End of Function ========================*/
1319
1320 /*------------------------------------------------------------------*/
1321 /*                                                                  */
1322 /* Name         - mono_arch_cpu_optimizations                       */
1323 /*                                                                  */
1324 /* Function     - Returns the optimizations supported on this CPU   */
1325 /*                                                                  */
1326 /*------------------------------------------------------------------*/
1327
1328 guint32
1329 mono_arch_cpu_optimizations (guint32 *exclude_mask)
1330 {
1331         guint32 opts = 0;
1332
1333         /*----------------------------------------------------------*/
1334         /* No s390-specific optimizations yet                       */
1335         /*----------------------------------------------------------*/
1336         *exclude_mask = MONO_OPT_LINEARS;
1337         return opts;
1338 }
1339
1340 /*========================= End of Function ========================*/
1341
1342 /*------------------------------------------------------------------*/
1343 /*                                                                  */
1344 /* Name         - mono_arch_cpu_enumerate_simd_versions             */
1345 /*                                                                  */
1346 /* Function     - Returns the SIMD instruction sets on this CPU     */
1347 /*                                                                  */
1348 /*------------------------------------------------------------------*/
1349 guint32
1350 mono_arch_cpu_enumerate_simd_versions (void)
1351 {
1352         /* SIMD is currently unimplemented */
1353         return 0;
1354 }
1355 /*========================= End of Function ========================*/
1356
1357 /*------------------------------------------------------------------*/
1358 /*                                                                  */
1359 /* Name         - mono_arch_get_allocatable_int_vars                */
1360 /*                                                                  */
1361 /* Function     -                                                   */
1362 /*                                                                  */
1363 /*------------------------------------------------------------------*/
1364
1365 GList *
1366 mono_arch_get_allocatable_int_vars (MonoCompile *cfg)
1367 {
1368         GList *vars = NULL;
1369         int i;
1370
1371         for (i = 0; i < cfg->num_varinfo; i++) {
1372                 MonoInst *ins = cfg->varinfo [i];
1373                 MonoMethodVar *vmv = MONO_VARINFO (cfg, i);
1374
1375                 /* unused vars */
1376                 if (vmv->range.first_use.abs_pos >= vmv->range.last_use.abs_pos)
1377                         continue;
1378
1379                 if (ins->flags & (MONO_INST_VOLATILE|MONO_INST_INDIRECT) ||
1380                     (ins->opcode != OP_LOCAL && ins->opcode != OP_ARG))
1381                         continue;
1382
1383                 /* we can only allocate 32 bit values */
1384                 if (mono_is_regsize_var(ins->inst_vtype)) {
1385                         g_assert (MONO_VARINFO (cfg, i)->reg == -1);
1386                         g_assert (i == vmv->idx);
1387                         vars = mono_varlist_insert_sorted (cfg, vars, vmv, FALSE);
1388                 }
1389         }
1390
1391         return vars;
1392 }
1393
1394 /*========================= End of Function ========================*/
1395
1396 /*------------------------------------------------------------------*/
1397 /*                                                                  */
1398 /* Name         - mono_arch_global_int_regs                         */
1399 /*                                                                  */
1400 /* Function     - Return a list of usable integer registers.        */
1401 /*                                                                  */
1402 /*------------------------------------------------------------------*/
1403
1404 GList *
1405 mono_arch_get_global_int_regs (MonoCompile *cfg)
1406 {
1407         GList *regs = NULL;
1408         MonoMethodHeader *header;
1409         int i, top = 13;
1410
1411         header = cfg->header;
1412         if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
1413                 cfg->frame_reg = s390_r11;
1414
1415
1416         /* FIXME: s390_r12 is reserved for bkchain_reg. Only reserve it if needed */
1417         top = 12;
1418         for (i = 8; i < top; ++i) {
1419                 if (cfg->frame_reg != i)
1420                         regs = g_list_prepend (regs, GUINT_TO_POINTER (i));
1421         }
1422
1423         return regs;
1424 }
1425
1426 /*========================= End of Function ========================*/
1427
1428 /*------------------------------------------------------------------*/
1429 /*                                                                  */
1430 /* Name         -  mono_arch_flush_icache                           */
1431 /*                                                                  */
1432 /* Function     -  Flush the CPU icache.                            */
1433 /*                                                                  */
1434 /*------------------------------------------------------------------*/
1435
1436 void
1437 mono_arch_flush_icache (guint8 *code, gint size)
1438 {
1439 }
1440
1441 /*========================= End of Function ========================*/
1442
1443 /*------------------------------------------------------------------*/
1444 /*                                                                  */
1445 /* Name         - add_general                                       */
1446 /*                                                                  */
1447 /* Function     - Determine code and stack size incremements for a  */
1448 /*                parameter.                                        */
1449 /*                                                                  */
1450 /*------------------------------------------------------------------*/
1451
1452 static void inline
1453 add_general (guint *gr, size_data *sz, ArgInfo *ainfo)
1454 {
1455         if (*gr > S390_LAST_ARG_REG) {
1456                 sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1457                 ainfo->offset   = sz->stack_size;
1458                 ainfo->reg      = STK_BASE;
1459                 ainfo->regtype  = RegTypeBase;
1460                 sz->stack_size += sizeof(long);
1461                 sz->local_size += sizeof(long);
1462                 sz->offStruct  += sizeof(long);
1463                 sz->code_size  += 12;
1464         } else {
1465                 ainfo->reg      = *gr;
1466                 sz->code_size  += 8;
1467         }
1468         (*gr) ++;
1469 }
1470
1471 /*========================= End of Function ========================*/
1472
1473 /*------------------------------------------------------------------*/
1474 /*                                                                  */
1475 /* Name         - add_stackParm                                     */
1476 /*                                                                  */
1477 /* Function     - Determine code and stack size incremements for a  */
1478 /*                parameter.                                        */
1479 /*                                                                  */
1480 /*------------------------------------------------------------------*/
1481
1482 static void inline
1483 add_stackParm (guint *gr, size_data *sz, ArgInfo *ainfo, gint size)
1484 {
1485         if (*gr > S390_LAST_ARG_REG) {
1486                 sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1487                 ainfo->reg          = STK_BASE;
1488                 ainfo->offset   = sz->stack_size;
1489                 ainfo->regtype  = RegTypeStructByAddrOnStack;
1490                 sz->stack_size += sizeof (gpointer);
1491                 sz->parm_size  += sizeof(gpointer);
1492                 sz->offStruct  += sizeof(gpointer);
1493         } else {
1494                 ainfo->reg      = *gr;
1495                 ainfo->offset   = sz->stack_size;
1496                 ainfo->regtype  = RegTypeStructByAddr;
1497         }
1498         (*gr) ++;
1499         ainfo->offparm  = sz->offset;
1500         sz->offset      = S390_ALIGN(sz->offset+size, sizeof(long));
1501         ainfo->size     = size;
1502         ainfo->vtsize   = size;
1503         sz->parm_size  += size;
1504 }
1505
1506 /*========================= End of Function ========================*/
1507
1508 /*------------------------------------------------------------------*/
1509 /*                                                                  */
1510 /* Name         - add_float                                         */
1511 /*                                                                  */
1512 /* Function     - Determine code and stack size incremements for a  */
1513 /*                float parameter.                                  */
1514 /*                                                                  */
1515 /*------------------------------------------------------------------*/
1516
1517 static void inline
1518 add_float (guint *fr,  size_data *sz, ArgInfo *ainfo)
1519 {
1520         if ((*fr) <= S390_LAST_FPARG_REG) {
1521                 ainfo->regtype = RegTypeFP;
1522                 ainfo->reg     = *fr;
1523                 sz->code_size += 4;
1524                 (*fr) += 2;
1525         }
1526         else {
1527                 ainfo->offset   = sz->stack_size;
1528                 ainfo->reg      = STK_BASE;
1529                 ainfo->regtype  = RegTypeBase;
1530                 sz->code_size  += 4;
1531                 sz->stack_size += sizeof(double);
1532                 sz->local_size += sizeof(double);
1533                 sz->offStruct  += sizeof(double);
1534         }
1535 }
1536
1537 /*========================= End of Function ========================*/
1538
1539 /*------------------------------------------------------------------*/
1540 /*                                                                  */
1541 /* Name         - get_call_info                                     */
1542 /*                                                                  */
1543 /* Function     - Determine the amount of space required for code   */
1544 /*                and stack. In addition determine starting points  */
1545 /*                for stack-based parameters, and area for struct-  */
1546 /*                ures being returned on the stack.                 */
1547 /*                                                                  */
1548 /*------------------------------------------------------------------*/
1549
1550 static CallInfo *
1551 get_call_info (MonoCompile *cfg, MonoMemPool *mp, MonoMethodSignature *sig)
1552 {
1553         guint i, fr, gr, size, pstart;
1554         int nParm = sig->hasthis + sig->param_count;
1555         MonoType *ret_type;
1556         guint32 simpleType, align;
1557         gboolean is_pinvoke = sig->pinvoke;
1558         CallInfo *cinfo;
1559         size_data *sz;
1560         MonoGenericSharingContext *gsctx = cfg ? cfg->generic_sharing_context : NULL;
1561
1562         if (mp)
1563                 cinfo = mono_mempool_alloc0 (mp, sizeof (CallInfo) + sizeof (ArgInfo) * nParm);
1564         else
1565                 cinfo = g_malloc0 (sizeof (CallInfo) + sizeof (ArgInfo) * nParm);
1566
1567         fr                = 0;
1568         gr                = s390_r2;
1569         nParm             = 0;
1570         cinfo->struct_ret = 0;
1571         sz                = &cinfo->sz;
1572         sz->retStruct     = 0;
1573         sz->offset        = 0;
1574         sz->offStruct     = S390_MINIMAL_STACK_SIZE;
1575         sz->stack_size    = S390_MINIMAL_STACK_SIZE;
1576         sz->code_size     = 0;
1577         sz->parm_size     = 0;
1578         sz->local_size    = 0;
1579         align             = 0;
1580         size              = 0;
1581
1582         /*----------------------------------------------------------*/
1583         /* We determine the size of the return code/stack in case we*/
1584         /* need to reserve a register to be used to address a stack */
1585         /* area that the callee will use.                           */
1586         /*----------------------------------------------------------*/
1587
1588         ret_type = mini_type_get_underlying_type (gsctx, sig->ret);
1589         ret_type = mini_get_basic_type_from_generic (gsctx, ret_type);
1590         simpleType = ret_type->type;
1591 enum_retvalue:
1592         switch (simpleType) {
1593                 case MONO_TYPE_BOOLEAN:
1594                 case MONO_TYPE_I1:
1595                 case MONO_TYPE_U1:
1596                 case MONO_TYPE_I2:
1597                 case MONO_TYPE_U2:
1598                 case MONO_TYPE_CHAR:
1599                 case MONO_TYPE_I4:
1600                 case MONO_TYPE_U4:
1601                 case MONO_TYPE_I:
1602                 case MONO_TYPE_U:
1603                 case MONO_TYPE_CLASS:
1604                 case MONO_TYPE_OBJECT:
1605                 case MONO_TYPE_SZARRAY:
1606                 case MONO_TYPE_ARRAY:
1607                 case MONO_TYPE_PTR:
1608                 case MONO_TYPE_FNPTR:
1609                 case MONO_TYPE_STRING:
1610                         cinfo->ret.reg = s390_r2;
1611                         sz->code_size += 4;
1612                         break;
1613                 case MONO_TYPE_R4:
1614                 case MONO_TYPE_R8:
1615                         cinfo->ret.reg = s390_f0;
1616                         sz->code_size += 4;
1617                         break;
1618                 case MONO_TYPE_I8:
1619                 case MONO_TYPE_U8:
1620                         cinfo->ret.reg = s390_r2;
1621                         sz->code_size += 4;
1622                         break;
1623                 case MONO_TYPE_GENERICINST:
1624                         if (!mono_type_generic_inst_is_valuetype (sig->ret)) {
1625                                 cinfo->ret.reg = s390_r2;
1626                                 sz->code_size += 4;
1627                                 break;
1628                         }
1629                         /* Fall through */
1630                 case MONO_TYPE_VALUETYPE: {
1631                         MonoClass *klass = mono_class_from_mono_type (sig->ret);
1632                         if (klass->enumtype) {
1633                                 simpleType = mono_class_enum_basetype (klass)->type;
1634                                 goto enum_retvalue;
1635                         }
1636                         size = mini_type_stack_size_full (gsctx, &klass->byval_arg, NULL, sig->pinvoke);
1637
1638                         cinfo->struct_ret = 1;
1639                         cinfo->ret.size   = size;
1640                         cinfo->ret.vtsize = size;
1641                         break;
1642                 }
1643                 case MONO_TYPE_TYPEDBYREF:
1644                         size = sizeof (MonoTypedRef);
1645                         cinfo->struct_ret = 1;
1646                         cinfo->ret.size   = size;
1647                         cinfo->ret.vtsize = size;
1648                         break;
1649                 case MONO_TYPE_VOID:
1650                         break;
1651                 default:
1652                         g_error ("Can't handle as return value 0x%x", sig->ret->type);
1653         }
1654
1655
1656         pstart = 0;
1657         /*
1658          * To simplify get_this_arg_reg () and LLVM integration, emit the vret arg after
1659          * the first argument, allowing 'this' to be always passed in the first arg reg.
1660          * Also do this if the first argument is a reference type, since virtual calls
1661          * are sometimes made using calli without sig->hasthis set, like in the delegate
1662          * invoke wrappers.
1663          */
1664         if (cinfo->struct_ret && !is_pinvoke &&
1665             (sig->hasthis ||
1666              (sig->param_count > 0 &&
1667               MONO_TYPE_IS_REFERENCE (mini_type_get_underlying_type (gsctx, sig->params [0]))))) {
1668                 if (sig->hasthis) {
1669                         cinfo->args[nParm].size = sizeof (gpointer);
1670                         add_general (&gr, sz, cinfo->args + nParm);
1671                 } else {
1672                         cinfo->args[nParm].size = sizeof (gpointer);
1673                         add_general (&gr, sz, &cinfo->args [sig->hasthis + nParm]);
1674                         pstart = 1;
1675                 }
1676                 nParm ++;
1677                 cinfo->vret_arg_index = 1;
1678                 cinfo->ret.reg = gr;
1679                 gr ++;
1680         } else {
1681                 /* this */
1682                 if (sig->hasthis) {
1683                         cinfo->args[nParm].size = sizeof (gpointer);
1684                         add_general (&gr, sz, cinfo->args + nParm);
1685                         nParm ++;
1686                 }
1687
1688                 if (cinfo->struct_ret) {
1689                         cinfo->ret.reg = gr;
1690                         gr ++;
1691                 }
1692         }
1693
1694         if ((sig->call_convention == MONO_CALL_VARARG) && (sig->param_count == 0)) {
1695                 gr = S390_LAST_ARG_REG + 1;
1696                 fr = S390_LAST_FPARG_REG + 1;
1697
1698                 /* Emit the signature cookie just before the implicit arguments */
1699                 add_general (&gr, sz, &cinfo->sigCookie);
1700         }
1701
1702         /*----------------------------------------------------------*/
1703         /* We determine the size of the parameter code and stack    */
1704         /* requirements by checking the types and sizes of the      */
1705         /* parameters.                                              */
1706         /*----------------------------------------------------------*/
1707
1708         for (i = pstart; i < sig->param_count; ++i) {
1709                 MonoType *ptype;
1710
1711                 /*--------------------------------------------------*/
1712                 /* Handle vararg type calls. All args are put on    */
1713                 /* the stack.                                       */
1714                 /*--------------------------------------------------*/
1715                 if ((sig->call_convention == MONO_CALL_VARARG) &&
1716                     (i == sig->sentinelpos)) {
1717                         gr = S390_LAST_ARG_REG + 1;
1718                         fr = S390_LAST_FPARG_REG + 1;
1719                         add_general (&gr, sz, &cinfo->sigCookie);
1720                 }
1721
1722                 if (sig->params [i]->byref) {
1723                         add_general (&gr, sz, cinfo->args+nParm);
1724                         cinfo->args[nParm].size = sizeof(gpointer);
1725                         nParm++;
1726                         continue;
1727                 }
1728
1729                 ptype = mini_type_get_underlying_type (gsctx, sig->params [i]);
1730                 simpleType = ptype->type;
1731                 cinfo->args[nParm].type = simpleType;
1732                 switch (simpleType) {
1733                 case MONO_TYPE_BOOLEAN:
1734                 case MONO_TYPE_I1:
1735                 case MONO_TYPE_U1:
1736                         cinfo->args[nParm].size = sizeof(char);
1737                         add_general (&gr, sz, cinfo->args+nParm);
1738                         nParm++;
1739                         break;
1740                 case MONO_TYPE_I2:
1741                 case MONO_TYPE_U2:
1742                 case MONO_TYPE_CHAR:
1743                         cinfo->args[nParm].size = sizeof(short);
1744                         add_general (&gr, sz, cinfo->args+nParm);
1745                         nParm++;
1746                         break;
1747                 case MONO_TYPE_I4:
1748                 case MONO_TYPE_U4:
1749                         cinfo->args[nParm].size = sizeof(int);
1750                         add_general (&gr, sz, cinfo->args+nParm);
1751                         nParm++;
1752                         break;
1753                 case MONO_TYPE_I:
1754                 case MONO_TYPE_U:
1755                 case MONO_TYPE_PTR:
1756                 case MONO_TYPE_FNPTR:
1757                 case MONO_TYPE_CLASS:
1758                 case MONO_TYPE_OBJECT:
1759                 case MONO_TYPE_STRING:
1760                 case MONO_TYPE_SZARRAY:
1761                 case MONO_TYPE_ARRAY:
1762                         cinfo->args[nParm].size = sizeof(gpointer);
1763                         add_general (&gr, sz, cinfo->args+nParm);
1764                         nParm++;
1765                         break;
1766                 case MONO_TYPE_I8:
1767                 case MONO_TYPE_U8:
1768                         cinfo->args[nParm].size = sizeof(long long);
1769                         add_general (&gr, sz, cinfo->args+nParm);
1770                         nParm++;
1771                         break;
1772                 case MONO_TYPE_R4:
1773                         cinfo->args[nParm].size = sizeof(float);
1774                         add_float (&fr, sz, cinfo->args+nParm);
1775                         nParm++;
1776                         break;
1777                 case MONO_TYPE_R8:
1778                         cinfo->args[nParm].size = sizeof(double);
1779                         add_float (&fr, sz, cinfo->args+nParm);
1780                         nParm++;
1781                         break;
1782                 case MONO_TYPE_GENERICINST:
1783                         if (!mono_type_generic_inst_is_valuetype (ptype)) {
1784                                 cinfo->args[nParm].size = sizeof(gpointer);
1785                                 add_general (&gr, sz, cinfo->args+nParm);
1786                                 nParm++;
1787                                 break;
1788                         }
1789                         /* Fall through */
1790                 case MONO_TYPE_VALUETYPE: {
1791                         MonoMarshalType *info;
1792                         MonoClass *klass = mono_class_from_mono_type (ptype);
1793
1794                         if (sig->pinvoke)
1795                                 size = mono_class_native_size(klass, NULL);
1796                         else
1797                                 size = mono_class_value_size(klass, NULL);
1798
1799                         if (simpleType != MONO_TYPE_GENERICINST) {
1800                                 info = mono_marshal_load_type_info(klass);
1801
1802                                 if ((info->native_size == sizeof(float)) &&
1803                                     (info->num_fields  == 1) &&
1804                                     (info->fields[0].field->type->type == MONO_TYPE_R4)) {
1805                                         cinfo->args[nParm].size = sizeof(float);
1806                                         add_float(&fr, sz, cinfo->args+nParm);
1807                                         nParm ++;
1808                                         break;
1809                                 }
1810
1811                                 if ((info->native_size == sizeof(double)) &&
1812                                     (info->num_fields  == 1) &&
1813                                     (info->fields[0].field->type->type == MONO_TYPE_R8)) {
1814                                         cinfo->args[nParm].size = sizeof(double);
1815                                         add_float(&fr, sz, cinfo->args+nParm);
1816                                         nParm ++;
1817                                         break;
1818                                 }
1819                         }
1820
1821                         cinfo->args[nParm].vtsize  = 0;
1822                         cinfo->args[nParm].size    = 0;
1823
1824                         switch (size) {
1825                                 /*----------------------------------*/
1826                                 /* On S/390, structures of size 1,  */
1827                                 /* 2, 4, and 8 bytes are passed in  */
1828                                 /* (a) register(s).                 */
1829                                 /*----------------------------------*/
1830                                 case 0:
1831                                 case 1:
1832                                 case 2:
1833                                 case 4:
1834                                 case 8:
1835                                         add_general(&gr, sz, cinfo->args+nParm);
1836                                         cinfo->args[nParm].size    = size;
1837                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1838                                         nParm++;
1839                                         sz->local_size            += sizeof(long);
1840                                         break;
1841                                 default:
1842                                         add_stackParm(&gr, sz, cinfo->args+nParm, size);
1843                                         nParm++;
1844                         }
1845                 }
1846                         break;
1847                 case MONO_TYPE_TYPEDBYREF: {
1848                         int size = sizeof (MonoTypedRef);
1849
1850                         cinfo->args[nParm].vtsize  = 0;
1851                         cinfo->args[nParm].size    = 0;
1852
1853                         switch (size) {
1854                                 /*----------------------------------*/
1855                                 /* On S/390, structures of size 1,  */
1856                                 /* 2, 4, and 8 bytes are passed in  */
1857                                 /* (a) register(s).                 */
1858                                 /*----------------------------------*/
1859                                 case 0:
1860                                 case 1:
1861                                 case 2:
1862                                 case 4:
1863                                 case 8:
1864                                         add_general(&gr, sz, cinfo->args+nParm);
1865                                         cinfo->args[nParm].size    = size;
1866                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1867                                         nParm++;
1868                                         sz->local_size            += sizeof(long);
1869                                         break;
1870                                 default:
1871                                         add_stackParm(&gr, sz, cinfo->args+nParm, size);
1872                                         nParm++;
1873                         }
1874                 }
1875                         break;
1876                 default:
1877                         g_error ("Can't trampoline 0x%x", ptype);
1878                 }
1879         }
1880
1881         /*----------------------------------------------------------*/
1882         /* Handle the case where there are no implicit arguments    */
1883         /*----------------------------------------------------------*/
1884         if ((sig->call_convention == MONO_CALL_VARARG) &&
1885             (nParm > 0) &&
1886             (!sig->pinvoke) &&
1887             (sig->param_count == sig->sentinelpos)) {
1888                 gr = S390_LAST_ARG_REG + 1;
1889                 fr = S390_LAST_FPARG_REG + 1;
1890                 add_general (&gr, sz, &cinfo->sigCookie);
1891         }
1892
1893         /*----------------------------------------------------------*/
1894         /* If we are passing a structure back then if it won't be   */
1895         /* in a register(s) then we make room at the end of the     */
1896         /* parameters that may have been placed on the stack        */
1897         /*----------------------------------------------------------*/
1898         if (cinfo->struct_ret) {
1899                 cinfo->ret.offset = sz->stack_size;
1900                 switch (cinfo->ret.size) {
1901                 case 0:
1902                 case 1:
1903                 case 2:
1904                 case 4:
1905                 case 8:
1906                         break;
1907                 default:
1908                         sz->stack_size   += S390_ALIGN(cinfo->ret.size, align);
1909                 }
1910         }
1911
1912         cinfo->lastgr   = gr;
1913         sz->stack_size  = sz->stack_size + sz->local_size + sz->parm_size +
1914                           sz->offset;
1915         sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1916
1917         return (cinfo);
1918 }
1919
1920 /*========================= End of Function ========================*/
1921
1922 /*------------------------------------------------------------------*/
1923 /*                                                                  */
1924 /* Name         - mono_arch_allocate_vars                           */
1925 /*                                                                  */
1926 /* Function     - Set var information according to the calling      */
1927 /*                convention for S/390. The local var stuff should  */
1928 /*                most likely be split in another method.           */
1929 /*                                                                  */
1930 /* Parameter    - @m - Compile unit.                                */
1931 /*                                                                  */
1932 /*------------------------------------------------------------------*/
1933
1934 void
1935 mono_arch_allocate_vars (MonoCompile *cfg)
1936 {
1937         MonoMethodSignature *sig;
1938         MonoMethodHeader *header;
1939         MonoInst *inst;
1940         CallInfo *cinfo;
1941         int iParm, iVar, offset, align, size, curinst;
1942         int frame_reg = STK_BASE;
1943         int sArg, eArg;
1944
1945         header  = cfg->header;
1946
1947         cfg->flags |= MONO_CFG_HAS_SPILLUP;
1948
1949         /*---------------------------------------------------------*/
1950         /* We use the frame register also for any method that has  */
1951         /* filter clauses. This way, when the handlers are called, */
1952         /* the code will reference local variables using the frame */
1953         /* reg instead of the stack pointer: if we had to restore  */
1954         /* the stack pointer, we'd corrupt the method frames that  */
1955         /* are already on the stack (since filters get called      */
1956         /* before stack unwinding happens) when the filter code    */
1957         /* would call any method.                                  */
1958         /*---------------------------------------------------------*/
1959         if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
1960                 frame_reg = s390_r11;
1961
1962         cfg->frame_reg = frame_reg;
1963
1964         cfg->arch.bkchain_reg = -1;
1965
1966         if (frame_reg != STK_BASE)
1967                 cfg->used_int_regs |= (1 << frame_reg);
1968
1969         if (cfg->uses_rgctx_reg)
1970                 cfg->used_int_regs |= (1 << MONO_ARCH_IMT_REG);
1971
1972         sig     = mono_method_signature (cfg->method);
1973
1974         cinfo   = get_call_info (cfg, cfg->mempool, sig);
1975
1976         if (!cinfo->struct_ret) {
1977                 switch (mini_type_get_underlying_type (cfg->generic_sharing_context, sig->ret)->type) {
1978                 case MONO_TYPE_VOID:
1979                         break;
1980                 default:
1981                         cfg->ret->opcode = OP_REGVAR;
1982                         cfg->ret->dreg   = s390_r2;
1983                         break;
1984                 }
1985         }
1986
1987         /*--------------------------------------------------------------*/
1988         /* local vars are at a positive offset from the stack pointer   */
1989         /* also note that if the function uses alloca, we use s390_r11  */
1990         /* to point at the local variables.                             */
1991         /* add parameter area size for called functions                 */
1992         /*--------------------------------------------------------------*/
1993         if (cfg->param_area == 0)
1994                 offset = S390_MINIMAL_STACK_SIZE;
1995         else
1996                 offset = cfg->param_area;
1997
1998         cfg->sig_cookie = 0;
1999
2000         if (cinfo->struct_ret) {
2001                 inst               = cfg->vret_addr;
2002                 offset             = S390_ALIGN(offset, sizeof(gpointer));
2003                 inst->inst_offset  = offset;
2004                 inst->opcode       = OP_REGOFFSET;
2005                 inst->inst_basereg = frame_reg;
2006                 offset            += sizeof(gpointer);
2007                 if (G_UNLIKELY (cfg->verbose_level > 1)) {
2008                         printf ("vret_addr =");
2009                         mono_print_ins (cfg->vret_addr);
2010                 }
2011         }
2012
2013         if (sig->hasthis) {
2014                 inst = cfg->args [0];
2015                 if (inst->opcode != OP_REGVAR) {
2016                         inst->opcode       = OP_REGOFFSET;
2017                         inst->inst_basereg = frame_reg;
2018                         offset             = S390_ALIGN(offset, sizeof(gpointer));
2019                         inst->inst_offset  = offset;
2020                         offset            += sizeof (gpointer);
2021                 }
2022                 curinst = sArg = 1;
2023         } else {
2024                 curinst = sArg = 0;
2025         }
2026
2027         eArg = sig->param_count + sArg;
2028
2029         if (sig->call_convention == MONO_CALL_VARARG)
2030                 cfg->sig_cookie += S390_MINIMAL_STACK_SIZE;
2031
2032         for (iParm = sArg; iParm < eArg; ++iParm) {
2033                 inst = cfg->args [curinst];
2034                 if (inst->opcode != OP_REGVAR) {
2035                         switch (cinfo->args[iParm].regtype) {
2036                         case RegTypeStructByAddr : {
2037                                 MonoInst *indir;
2038
2039                                 size = sizeof (gpointer);
2040
2041                                 inst->opcode       = OP_REGOFFSET;
2042                                 inst->inst_basereg = frame_reg;
2043                                 offset             = S390_ALIGN (offset, sizeof (gpointer));
2044                                 inst->inst_offset  = offset;
2045
2046                                 /* Add a level of indirection */
2047                                 MONO_INST_NEW (cfg, indir, 0);
2048                                 *indir          = *inst;
2049                                 inst->opcode    = OP_VTARG_ADDR;
2050                                 inst->inst_left = indir;
2051                         }
2052                                 break;
2053                         case RegTypeStructByAddrOnStack : {
2054                                 MonoInst *indir;
2055
2056                                 size = sizeof (gpointer);
2057
2058                                 /* Similar to the == STK_BASE case below */
2059                                 cfg->arch.bkchain_reg = s390_r12;
2060                                 cfg->used_int_regs |= 1 << cfg->arch.bkchain_reg;
2061
2062                                 inst->opcode = OP_REGOFFSET;
2063                                 inst->dreg = mono_alloc_preg (cfg);
2064                                 inst->inst_basereg = cfg->arch.bkchain_reg;
2065                                 inst->inst_offset = cinfo->args [iParm].offset;
2066
2067                                 /* Add a level of indirection */
2068                                 MONO_INST_NEW (cfg, indir, 0);
2069                                 *indir = *inst;
2070                                 inst->opcode = OP_VTARG_ADDR;
2071                                 inst->inst_left = indir;
2072                                 break;
2073                         }
2074                         case RegTypeStructByVal :
2075                                 size               = cinfo->args[iParm].size;
2076                                 offset             = S390_ALIGN(offset, size);
2077                                 inst->opcode       = OP_REGOFFSET;
2078                                 inst->inst_basereg = frame_reg;
2079                                 inst->inst_offset  = offset;
2080                                 break;
2081                         default :
2082                                 if (cinfo->args [iParm].reg == STK_BASE) {
2083                                         /*
2084                                          * These arguments are in the previous frame, so we can't
2085                                          * compute their offset from the current frame pointer right
2086                                          * now, since cfg->stack_offset is not yet known, so dedicate a
2087                                          * register holding the previous frame pointer.
2088                                          */
2089                                         cfg->arch.bkchain_reg = s390_r12;
2090                                         cfg->used_int_regs |= 1 << cfg->arch.bkchain_reg;
2091
2092                                         inst->opcode       = OP_REGOFFSET;
2093                                         inst->inst_basereg = cfg->arch.bkchain_reg;
2094                                         size               = (cinfo->args[iParm].size < 8
2095                                                                           ? 8 - cinfo->args[iParm].size
2096                                                                           : 0);
2097                                         inst->inst_offset  = cinfo->args [iParm].offset + size;
2098                                         size = sizeof (long);
2099                                 } else {
2100                                         inst->opcode       = OP_REGOFFSET;
2101                                         inst->inst_basereg = frame_reg;
2102                                         size               = (cinfo->args[iParm].size < 8
2103                                                                           ? sizeof(int)
2104                                                                           : sizeof(long));
2105                                         offset             = S390_ALIGN(offset, size);
2106                                         if (cfg->method->wrapper_type == MONO_WRAPPER_MANAGED_TO_NATIVE)
2107                                                 inst->inst_offset  = offset;
2108                                         else
2109                                                 inst->inst_offset  = offset + (8 - size);
2110                                 }
2111                                 break;
2112                         }
2113 #if 0
2114                         if ((sig->call_convention == MONO_CALL_VARARG) &&
2115                             (cinfo->args[iParm].regtype != RegTypeGeneral) &&
2116                             (iParm < sig->sentinelpos))
2117                                 cfg->sig_cookie += size;
2118 printf("%s %4d cookine %x\n",__FUNCTION__,__LINE__,cfg->sig_cookie);
2119 #endif
2120
2121                         offset += MAX(size, 8);
2122                 }
2123                 curinst++;
2124         }
2125
2126         cfg->locals_min_stack_offset = offset;
2127
2128         curinst = cfg->locals_start;
2129         for (iVar = curinst; iVar < cfg->num_varinfo; ++iVar) {
2130                 inst = cfg->varinfo [iVar];
2131                 if ((inst->flags & MONO_INST_IS_DEAD) ||
2132                     (inst->opcode == OP_REGVAR))
2133                         continue;
2134
2135                 /*--------------------------------------------------*/
2136                 /* inst->backend.is_pinvoke indicates native sized  */
2137                 /* value typs this is used by the pinvoke wrappers  */
2138                 /* when they call functions returning structure     */
2139                 /*--------------------------------------------------*/
2140                 if (inst->backend.is_pinvoke && MONO_TYPE_ISSTRUCT (inst->inst_vtype))
2141                         size = mono_class_native_size (mono_class_from_mono_type(inst->inst_vtype),
2142                                                        (guint32 *) &align);
2143                 else
2144                         size = mono_type_size (inst->inst_vtype, &align);
2145
2146                 offset             = S390_ALIGN(offset, align);
2147                 inst->inst_offset  = offset;
2148                 inst->opcode       = OP_REGOFFSET;
2149                 inst->inst_basereg = frame_reg;
2150                 offset            += size;
2151                 DEBUG (g_print("allocating local %d to %ld, size: %d\n",
2152                                 iVar, inst->inst_offset, size));
2153         }
2154
2155         cfg->locals_max_stack_offset = offset;
2156
2157         /*------------------------------------------------------*/
2158         /* Allow space for the trace method stack area if needed*/
2159         /*------------------------------------------------------*/
2160         if ((mono_jit_trace_calls != NULL && mono_trace_eval (cfg->method))
2161             || (cfg->prof_options & MONO_PROFILE_ENTER_LEAVE))
2162                 offset += S390_TRACE_STACK_SIZE;
2163
2164         /*------------------------------------------------------*/
2165         /* Reserve space to save LMF and caller saved registers */
2166         /*------------------------------------------------------*/
2167         if (cfg->method->save_lmf)
2168                 offset += sizeof (MonoLMF);
2169
2170         /*------------------------------------------------------*/
2171         /* align the offset                                     */
2172         /*------------------------------------------------------*/
2173         cfg->stack_offset = S390_ALIGN(offset, S390_STACK_ALIGNMENT);
2174
2175         /*------------------------------------------------------*/
2176         /* Fix offsets for args whose value is in parent frame  */
2177         /*------------------------------------------------------*/
2178         for (iParm = sArg; iParm < eArg; ++iParm) {
2179                 inst = cfg->args [iParm];
2180
2181                 if (inst->opcode == OP_S390_STKARG) {
2182                         inst->opcode = OP_REGOFFSET;
2183                         inst->inst_offset += cfg->stack_offset;
2184                 }
2185         }
2186 }
2187
2188 /*========================= End of Function ========================*/
2189
2190 /*------------------------------------------------------------------*/
2191 /*                                                                  */
2192 /* Name         - mono_arch_create_vars                             */
2193 /*                                                                  */
2194 /*------------------------------------------------------------------*/
2195
2196 void
2197 mono_arch_create_vars (MonoCompile *cfg)
2198 {
2199         MonoMethodSignature *sig;
2200         CallInfo *cinfo;
2201
2202         sig = mono_method_signature (cfg->method);
2203
2204         cinfo = get_call_info (cfg, cfg->mempool, sig);
2205
2206         if (cinfo->struct_ret) {
2207                 cfg->vret_addr = mono_compile_create_var (cfg, &mono_defaults.int_class->byval_arg, OP_ARG);
2208                 if (G_UNLIKELY (cfg->verbose_level > 1)) {
2209                         printf ("vret_addr = ");
2210                         mono_print_ins (cfg->vret_addr);
2211                 }
2212         }
2213 }
2214
2215 /*========================= End of Function ========================*/
2216
2217 /*------------------------------------------------------------------*/
2218 /*                                                                  */
2219 /* Name         - add_outarg_reg2.                                  */
2220 /*                                                                  */
2221 /*------------------------------------------------------------------*/
2222
2223 static void
2224 add_outarg_reg2 (MonoCompile *cfg, MonoCallInst *call, ArgStorage storage, int reg, MonoInst *tree)
2225 {
2226         MonoInst *ins;
2227
2228         switch (storage) {
2229         case RegTypeGeneral:
2230                 MONO_INST_NEW (cfg, ins, OP_MOVE);
2231                 ins->dreg = mono_alloc_ireg (cfg);
2232                 ins->sreg1 = tree->dreg;
2233                 MONO_ADD_INS (cfg->cbb, ins);
2234                 mono_call_inst_add_outarg_reg (cfg, call, ins->dreg, reg, FALSE);
2235                 break;
2236         case RegTypeFP:
2237                 MONO_INST_NEW (cfg, ins, OP_FMOVE);
2238                 ins->dreg = mono_alloc_freg (cfg);
2239                 ins->sreg1 = tree->dreg;
2240                 MONO_ADD_INS (cfg->cbb, ins);
2241                 mono_call_inst_add_outarg_reg (cfg, call, ins->dreg, reg, TRUE);
2242                 break;
2243         case RegTypeFPR4:
2244                 MONO_INST_NEW (cfg, ins, OP_S390_SETF4RET);
2245                 ins->dreg = mono_alloc_freg (cfg);
2246                 ins->sreg1 = tree->dreg;
2247                 MONO_ADD_INS (cfg->cbb, ins);
2248                 mono_call_inst_add_outarg_reg (cfg, call, ins->dreg, reg, TRUE);
2249                 break;
2250         default:
2251                 g_assert_not_reached ();
2252         }
2253 }
2254
2255 /*========================= End of Function ========================*/
2256
2257 /*------------------------------------------------------------------*/
2258 /*                                                                  */
2259 /* Name         - emit_sig_cookie.                                  */
2260 /*                                                                  */
2261 /*------------------------------------------------------------------*/
2262
2263 static void
2264 emit_sig_cookie (MonoCompile *cfg, MonoCallInst *call, CallInfo *cinfo)
2265 {
2266         MonoMethodSignature *tmpSig;
2267         MonoInst *sig_arg;
2268
2269         cfg->disable_aot = TRUE;
2270
2271         /*----------------------------------------------------------*/
2272         /* mono_ArgIterator_Setup assumes the signature cookie is   */
2273         /* passed first and all the arguments which were before it  */
2274         /* passed on the stack after the signature. So compensate   */
2275         /* by passing a different signature.                        */
2276         /*----------------------------------------------------------*/
2277         tmpSig = mono_metadata_signature_dup (call->signature);
2278         tmpSig->param_count -= call->signature->sentinelpos;
2279         tmpSig->sentinelpos  = 0;
2280         if (tmpSig->param_count > 0)
2281                 memcpy (tmpSig->params,
2282                         call->signature->params + call->signature->sentinelpos,
2283                         tmpSig->param_count * sizeof(MonoType *));
2284
2285         MONO_INST_NEW (cfg, sig_arg, OP_ICONST);
2286         sig_arg->dreg = mono_alloc_ireg (cfg);
2287         sig_arg->inst_p0 = tmpSig;
2288         MONO_ADD_INS (cfg->cbb, sig_arg);
2289
2290         MONO_EMIT_NEW_STORE_MEMBASE (cfg, OP_STORE_MEMBASE_REG, STK_BASE,
2291                                      cinfo->sigCookie.offset, sig_arg->dreg);
2292 }
2293
2294 /*========================= End of Function ========================*/
2295
2296 /*------------------------------------------------------------------*/
2297 /*                                                                  */
2298 /* Name         - mono_arch_emit_call                               */
2299 /*                                                                  */
2300 /*------------------------------------------------------------------*/
2301
2302 void
2303 mono_arch_emit_call (MonoCompile *cfg, MonoCallInst *call)
2304 {
2305         MonoInst *in;
2306         MonoMethodSignature *sig;
2307         MonoInst *ins;
2308         int i, n, lParamArea;
2309         CallInfo *cinfo;
2310         ArgInfo *ainfo = NULL;
2311         int stackSize;
2312         MonoMethodHeader *header;
2313         int frmReg;
2314
2315         sig = call->signature;
2316         n = sig->param_count + sig->hasthis;
2317         DEBUG (g_print ("Call requires: %d parameters\n",n));
2318
2319         cinfo = get_call_info (cfg, cfg->mempool, sig);
2320
2321         stackSize         = cinfo->sz.stack_size + cinfo->sz.local_size +
2322                             cinfo->sz.parm_size + cinfo->sz.offset;
2323         call->stack_usage = MAX(stackSize, call->stack_usage);
2324         lParamArea        = MAX((call->stack_usage-S390_MINIMAL_STACK_SIZE-cinfo->sz.parm_size), 0);
2325         cfg->param_area   = MAX(((signed) cfg->param_area), lParamArea);
2326         cfg->flags       |= MONO_CFG_HAS_CALLS;
2327
2328         if (cinfo->struct_ret) {
2329                 MONO_INST_NEW (cfg, ins, OP_MOVE);
2330                 ins->sreg1 = call->vret_var->dreg;
2331                 ins->dreg = mono_alloc_preg (cfg);
2332                 MONO_ADD_INS (cfg->cbb, ins);
2333                 mono_call_inst_add_outarg_reg (cfg, call, ins->dreg, cinfo->ret.reg, FALSE);
2334         }
2335
2336         header = cfg->header;
2337         if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
2338                 frmReg = s390_r11;
2339         else
2340                 frmReg = STK_BASE;
2341
2342         for (i = 0; i < n; ++i) {
2343                 MonoType *t;
2344
2345                 ainfo = cinfo->args + i;
2346                 if (i >= sig->hasthis)
2347                         t = sig->params [i - sig->hasthis];
2348                 else
2349                         t = &mono_defaults.int_class->byval_arg;
2350                 t = mini_type_get_underlying_type (cfg->generic_sharing_context, t);
2351
2352                 in = call->args [i];
2353
2354                 if ((sig->call_convention == MONO_CALL_VARARG) &&
2355                     (!sig->pinvoke) &&
2356                     (i == sig->sentinelpos)) {
2357                         emit_sig_cookie (cfg, call, cinfo);
2358                 }
2359
2360                 switch (ainfo->regtype) {
2361                 case RegTypeGeneral:
2362                         add_outarg_reg2 (cfg, call, ainfo->regtype, ainfo->reg, in);
2363                         break;
2364                 case RegTypeFP:
2365                         if (MONO_TYPE_ISSTRUCT (t)) {
2366                                 /* Valuetype passed in one fp register */
2367                                 ainfo->regtype = RegTypeStructByValInFP;
2368                                 /* Fall through */
2369                         } else {
2370                                 if (ainfo->size == 4)
2371                                         ainfo->regtype = RegTypeFPR4;
2372                                 add_outarg_reg2 (cfg, call, ainfo->regtype, ainfo->reg, in);
2373                                 break;
2374                         }
2375                 case RegTypeStructByVal:
2376                 case RegTypeStructByAddr:
2377                 case RegTypeStructByAddrOnStack: {
2378                         guint32 align;
2379                         guint32 size;
2380
2381                         if (sig->params [i - sig->hasthis]->type == MONO_TYPE_TYPEDBYREF) {
2382                                 size = sizeof (MonoTypedRef);
2383                                 align = sizeof (gpointer);
2384                         }
2385                         else
2386                                 if (sig->pinvoke)
2387                                         size = mono_type_native_stack_size (&in->klass->byval_arg, &align);
2388                                 else {
2389                                         /*
2390                                          * Other backends use mono_type_stack_size (), but that
2391                                          * aligns the size to 8, which is larger than the size of
2392                                          * the source, leading to reads of invalid memory if the
2393                                          * source is at the end of address space.
2394                                          */
2395                                         size = mono_class_value_size (in->klass, &align);
2396                                 }
2397
2398                         g_assert (in->klass);
2399
2400                         ainfo->offparm += cinfo->sz.offStruct;
2401
2402                         MONO_INST_NEW (cfg, ins, OP_OUTARG_VT);
2403                         ins->sreg1 = in->dreg;
2404                         ins->klass = in->klass;
2405                         ins->backend.size = ainfo->size;
2406                         ins->inst_p0 = call;
2407                         ins->inst_p1 = mono_mempool_alloc (cfg->mempool, sizeof (ArgInfo));
2408                         memcpy (ins->inst_p1, ainfo, sizeof (ArgInfo));
2409
2410                         MONO_ADD_INS (cfg->cbb, ins);
2411
2412                         if (ainfo->regtype == RegTypeStructByAddr) {
2413                                 /*
2414                                  * We use OP_OUTARG_VT to copy the valuetype to a stack location, then
2415                                  * use the normal OUTARG opcodes to pass the address of the location to
2416                                  * the callee.
2417                                  */
2418                                 int treg = mono_alloc_preg (cfg);
2419                                 MONO_EMIT_NEW_BIALU_IMM (cfg, OP_ADD_IMM, treg,
2420                                                          frmReg, ainfo->offparm);
2421                                 mono_call_inst_add_outarg_reg (cfg, call, treg, ainfo->reg, FALSE);
2422                         } else if (ainfo->regtype == RegTypeStructByAddrOnStack) {
2423                                 /* The address of the valuetype is passed on the stack */
2424                                 int treg = mono_alloc_preg (cfg);
2425                                 MONO_EMIT_NEW_BIALU_IMM (cfg, OP_ADD_IMM, treg,
2426                                                          frmReg, ainfo->offparm);
2427                                 MONO_EMIT_NEW_STORE_MEMBASE (cfg, OP_STORE_MEMBASE_REG,
2428                                                              ainfo->reg, ainfo->offset, treg);
2429
2430                                 if (cfg->compute_gc_maps) {
2431                                         MonoInst *def;
2432
2433                                         EMIT_NEW_GC_PARAM_SLOT_LIVENESS_DEF (cfg, def, ainfo->offset, t);
2434                                 }
2435                         }
2436                         break;
2437                 }
2438                 case RegTypeBase:
2439                         if (!t->byref && t->type == MONO_TYPE_R4) {
2440                                 MONO_EMIT_NEW_STORE_MEMBASE (cfg, OP_STORER4_MEMBASE_REG,
2441                                                              STK_BASE, ainfo->offset + 4,
2442                                                              in->dreg);
2443                         } else if (!t->byref && (t->type == MONO_TYPE_R8)) {
2444                                 MONO_EMIT_NEW_STORE_MEMBASE (cfg, OP_STORER8_MEMBASE_REG,
2445                                                              STK_BASE, ainfo->offset,
2446                                                              in->dreg);
2447                         } else {
2448                                 MONO_INST_NEW (cfg, ins, OP_STORE_MEMBASE_REG);
2449                                 ins->inst_destbasereg = STK_BASE;
2450                                 ins->inst_offset = ainfo->offset;
2451                                 ins->sreg1 = in->dreg;
2452
2453 #if 0
2454                                 /* This is needed by MonoTypedRef->value to point to the correct data */
2455                                 if ((sig->call_convention == MONO_CALL_VARARG) &&
2456                                         (i >= sig->sentinelpos)) {
2457                                         switch (ainfo->size) {
2458                                         case 1:
2459                                                 ins->opcode = OP_STOREI1_MEMBASE_REG;
2460                                                 break;
2461                                         case 2:
2462                                                 ins->opcode = OP_STOREI2_MEMBASE_REG;
2463                                                 break;
2464                                         case 4:
2465                                                 ins->opcode = OP_STOREI4_MEMBASE_REG;
2466                                                 break;
2467                                         default:
2468                                                 break;
2469                                         }
2470                                 }
2471 #endif
2472
2473                                 MONO_ADD_INS (cfg->cbb, ins);
2474                         }
2475                         break;
2476                 default:
2477                         g_assert_not_reached ();
2478                         break;
2479                 }
2480         }
2481
2482         /*
2483          * Handle the case where there are no implicit arguments
2484          */
2485         if ((sig->call_convention == MONO_CALL_VARARG) &&
2486             (!sig->pinvoke) &&
2487             (i == sig->sentinelpos)) {
2488                 emit_sig_cookie (cfg, call, cinfo);
2489         }
2490 }
2491
2492 /*========================= End of Function ========================*/
2493
2494 /*------------------------------------------------------------------*/
2495 /*                                                                  */
2496 /* Name         - mono_arch_emit_outarg_vt                          */
2497 /*                                                                  */
2498 /*------------------------------------------------------------------*/
2499
2500 void
2501 mono_arch_emit_outarg_vt (MonoCompile *cfg, MonoInst *ins, MonoInst *src)
2502 {
2503         MonoCallInst *call = (MonoCallInst*)ins->inst_p0;
2504         ArgInfo *ainfo = (ArgInfo*)ins->inst_p1;
2505         int size = ins->backend.size;
2506
2507         if (ainfo->regtype == RegTypeStructByVal) {
2508                 /*
2509                                 arg->ins.sreg1  = ainfo->reg;
2510                                 arg->ins.opcode = OP_OUTARG_VT;
2511                                 arg->size       = ainfo->size;
2512                                 arg->offset     = ainfo->offset;
2513                                 arg->offPrm     = ainfo->offparm + cinfo->sz.offStruct;
2514                 */
2515                 if (ainfo->reg != STK_BASE) {
2516                         MONO_OUTPUT_VTR (cfg, size, ainfo->reg, src->dreg, 0);
2517                 } else {
2518                         MONO_OUTPUT_VTS (cfg, size, ainfo->reg, ainfo->offset,
2519                                                           src->dreg, 0);
2520                 }
2521         } else if (ainfo->regtype == RegTypeStructByValInFP) {
2522                 int dreg = mono_alloc_freg (cfg);
2523
2524                 if (ainfo->size == 4) {
2525                         MONO_EMIT_NEW_LOAD_MEMBASE_OP (cfg, OP_LOADR4_MEMBASE, dreg, src->dreg, 0);
2526                         MONO_EMIT_NEW_UNALU (cfg, OP_S390_SETF4RET, dreg, dreg);
2527                 } else {
2528                         g_assert (ainfo->size == 8);
2529
2530                         MONO_EMIT_NEW_LOAD_MEMBASE_OP (cfg, OP_LOADR8_MEMBASE, dreg, src->dreg, 0);
2531                 }
2532
2533                 mono_call_inst_add_outarg_reg (cfg, call, dreg, ainfo->reg, TRUE);
2534         } else {
2535                 MonoMethodHeader *header;
2536                 int srcReg;
2537
2538                 header = mono_method_get_header (cfg->method);
2539                 if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
2540                         srcReg = s390_r11;
2541                 else
2542                         srcReg = STK_BASE;
2543
2544                 MONO_EMIT_NEW_MOVE (cfg, srcReg, ainfo->offparm,
2545                                                          src->dreg, 0, size);
2546
2547                 if (cfg->compute_gc_maps) {
2548                         MonoInst *def;
2549
2550                         EMIT_NEW_GC_PARAM_SLOT_LIVENESS_DEF (cfg, def, ainfo->offset, &ins->klass->byval_arg);
2551                 }
2552         }
2553 }
2554
2555 /*========================= End of Function ========================*/
2556
2557 /*------------------------------------------------------------------*/
2558 /*                                                                  */
2559 /* Name         - mono_arch_emit_setret                             */
2560 /*                                                                  */
2561 /*------------------------------------------------------------------*/
2562
2563 void
2564 mono_arch_emit_setret (MonoCompile *cfg, MonoMethod *method, MonoInst *val)
2565 {
2566         MonoType *ret = mini_type_get_underlying_type (cfg->generic_sharing_context,
2567                                 mono_method_signature (method)->ret);
2568
2569         if (!ret->byref) {
2570                 if (ret->type == MONO_TYPE_R4) {
2571                         MONO_EMIT_NEW_UNALU (cfg, OP_S390_SETF4RET, s390_f0, val->dreg);
2572                         return;
2573                 } else if (ret->type == MONO_TYPE_R8) {
2574                         MONO_EMIT_NEW_UNALU (cfg, OP_FMOVE, s390_f0, val->dreg);
2575                         return;
2576                 }
2577         }
2578
2579         MONO_EMIT_NEW_UNALU (cfg, OP_MOVE, cfg->ret->dreg, val->dreg);
2580 }
2581
2582 /*========================= End of Function ========================*/
2583
2584 /*------------------------------------------------------------------*/
2585 /*                                                                  */
2586 /* Name         - mono_arch_instrument_mem_needs                    */
2587 /*                                                                  */
2588 /* Function     - Allow tracing to work with this interface (with   */
2589 /*                an optional argument).                            */
2590 /*                                                                  */
2591 /*------------------------------------------------------------------*/
2592
2593 void
2594 mono_arch_instrument_mem_needs (MonoMethod *method, int *stack, int *code)
2595 {
2596         /* no stack room needed now (may be needed for FASTCALL-trace support) */
2597         *stack = 0;
2598         /* split prolog-epilog requirements? */
2599         *code = 50; /* max bytes needed: check this number */
2600 }
2601
2602 /*========================= End of Function ========================*/
2603
2604 /*------------------------------------------------------------------*/
2605 /*                                                                  */
2606 /* Name         - mono_arch_instrument_prolog                       */
2607 /*                                                                  */
2608 /* Function     - Create an "instrumented" prolog.                  */
2609 /*                                                                  */
2610 /*------------------------------------------------------------------*/
2611
2612 void*
2613 mono_arch_instrument_prolog (MonoCompile *cfg, void *func, void *p,
2614                              gboolean enable_arguments)
2615 {
2616         guchar  *code = p;
2617         int     parmOffset,
2618                 fpOffset,
2619                 baseReg;
2620
2621         parmOffset = cfg->stack_usage - S390_TRACE_STACK_SIZE;
2622         if (cfg->method->save_lmf)
2623                 parmOffset -= sizeof(MonoLMF);
2624         fpOffset   = parmOffset + (5*sizeof(gpointer));
2625         baseReg = STK_BASE;
2626
2627         s390_stmg (code, s390_r2, s390_r6, STK_BASE, parmOffset);
2628         s390_stdy (code, s390_f0, 0, STK_BASE, fpOffset);
2629         s390_stdy (code, s390_f2, 0, STK_BASE, fpOffset+sizeof(gdouble));
2630         s390_stdy (code, s390_f4, 0, STK_BASE, fpOffset+2*sizeof(gdouble));
2631         s390_stdy (code, s390_f6, 0, STK_BASE, fpOffset+3*sizeof(gdouble));
2632         S390_SET  (code, s390_r1, func);
2633         S390_SET  (code, s390_r2, cfg->method);
2634         s390_lay  (code, s390_r3, 0, STK_BASE, parmOffset);
2635         s390_lgr  (code, s390_r4, STK_BASE);
2636         s390_aghi (code, s390_r4, cfg->stack_usage);
2637         s390_basr (code, s390_r14, s390_r1);
2638         s390_ldy  (code, s390_f6, 0, STK_BASE, fpOffset+3*sizeof(gdouble));
2639         s390_ldy  (code, s390_f4, 0, STK_BASE, fpOffset+2*sizeof(gdouble));
2640         s390_ldy  (code, s390_f2, 0, STK_BASE, fpOffset+sizeof(gdouble));
2641         s390_ldy  (code, s390_f0, 0, STK_BASE, fpOffset);
2642         s390_lmg  (code, s390_r2, s390_r6, STK_BASE, parmOffset);
2643
2644         return code;
2645 }
2646
2647 /*========================= End of Function ========================*/
2648
2649 /*------------------------------------------------------------------*/
2650 /*                                                                  */
2651 /* Name         - mono_arch_instrument_epilog                       */
2652 /*                                                                  */
2653 /* Function     - Create an epilog that will handle the returned    */
2654 /*                values used in instrumentation.                   */
2655 /*                                                                  */
2656 /*------------------------------------------------------------------*/
2657
2658 void*
2659 mono_arch_instrument_epilog_full (MonoCompile *cfg, void *func, void *p, gboolean enable_arguments, gboolean preserve_argument_registers)
2660 {
2661         guchar     *code = p;
2662         int        save_mode = SAVE_NONE,
2663                    saveOffset,
2664                    offset;
2665         MonoMethod *method = cfg->method;
2666         int rtype = mini_type_get_underlying_type (cfg->generic_sharing_context,
2667                         mono_method_signature (method)->ret)->type;
2668
2669         offset = code - cfg->native_code;
2670         /*-----------------------------------------*/
2671         /* We need about 128 bytes of instructions */
2672         /*-----------------------------------------*/
2673         if (offset > (cfg->code_size - 128)) {
2674                 cfg->code_size *= 2;
2675                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
2676                 code = cfg->native_code + offset;
2677         }
2678
2679         saveOffset = cfg->stack_usage - S390_TRACE_STACK_SIZE;
2680         if (method->save_lmf)
2681                 saveOffset -= sizeof(MonoLMF);
2682
2683 handle_enum:
2684         switch (rtype) {
2685         case MONO_TYPE_VOID:
2686                 /* special case string .ctor icall */
2687                 if (strcmp (".ctor", method->name) && method->klass == mono_defaults.string_class)
2688                         save_mode = SAVE_ONE;
2689                 else
2690                         save_mode = SAVE_NONE;
2691                 break;
2692         case MONO_TYPE_I8:
2693         case MONO_TYPE_U8:
2694                 save_mode = SAVE_ONE;
2695                 break;
2696         case MONO_TYPE_R4:
2697                 save_mode = SAVE_R4;
2698                 break;
2699         case MONO_TYPE_R8:
2700                 save_mode = SAVE_R8;
2701                 break;
2702         case MONO_TYPE_VALUETYPE:
2703                 if (mono_method_signature (method)->ret->data.klass->enumtype) {
2704                         rtype = mono_class_enum_basetype (mono_method_signature (method)->ret->data.klass)->type;
2705                         goto handle_enum;
2706                 }
2707                 save_mode = SAVE_STRUCT;
2708                 break;
2709         default:
2710                 save_mode = SAVE_ONE;
2711                 break;
2712         }
2713
2714         switch (save_mode) {
2715         case SAVE_ONE:
2716                 s390_stg (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2717                 if (enable_arguments) {
2718                         s390_lgr (code, s390_r3, s390_r2);
2719                 }
2720                 break;
2721         case SAVE_R4:
2722                 s390_std (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2723                 if (enable_arguments) {
2724                         s390_ldebr (code, s390_f0, s390_f0);
2725                 }
2726                 break;
2727         case SAVE_R8:
2728                 s390_std (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2729                 break;
2730         case SAVE_STRUCT:
2731                 s390_stg (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2732                 if (enable_arguments) {
2733                         s390_lg (code, s390_r3, 0, cfg->frame_reg,
2734                                  S390_MINIMAL_STACK_SIZE+cfg->param_area);
2735                 }
2736                 break;
2737         case SAVE_NONE:
2738         default:
2739                 break;
2740         }
2741
2742         S390_SET  (code, s390_r1, func);
2743         S390_SET  (code, s390_r2, cfg->method);
2744         s390_basr (code, s390_r14, s390_r1);
2745
2746         switch (save_mode) {
2747         case SAVE_ONE:
2748                 s390_lg  (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2749                 break;
2750         case SAVE_R4:
2751         case SAVE_R8:
2752                 s390_ld  (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2753                 break;
2754         case SAVE_STRUCT:
2755                 s390_lg  (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2756                 break;
2757         case SAVE_NONE:
2758         default:
2759                 break;
2760         }
2761
2762         return code;
2763 }
2764
2765 /*========================= End of Function ========================*/
2766
2767 /*------------------------------------------------------------------*/
2768 /*                                                                  */
2769 /* Name         - mono_arch_peephole_pass_1                         */
2770 /*                                                                  */
2771 /* Function     - Form a peephole pass at the code looking for      */
2772 /*                simple optimizations.                             */
2773 /*                                                                  */
2774 /*------------------------------------------------------------------*/
2775
2776 void
2777 mono_arch_peephole_pass_1 (MonoCompile *cfg, MonoBasicBlock *bb)
2778 {
2779 }
2780
2781 /*========================= End of Function ========================*/
2782
2783 /*------------------------------------------------------------------*/
2784 /*                                                                  */
2785 /* Name         - mono_arch_peephole_pass_2                         */
2786 /*                                                                  */
2787 /* Function     - Form a peephole pass at the code looking for      */
2788 /*                simple optimizations.                             */
2789 /*                                                                  */
2790 /*------------------------------------------------------------------*/
2791
2792 void
2793 mono_arch_peephole_pass_2 (MonoCompile *cfg, MonoBasicBlock *bb)
2794 {
2795         MonoInst *ins, *n;
2796
2797         MONO_BB_FOR_EACH_INS_SAFE (bb, n, ins) {
2798                 mono_peephole_ins (bb, ins);
2799         }
2800 }
2801
2802 /*========================= End of Function ========================*/
2803
2804 /*------------------------------------------------------------------*/
2805 /*                                                                  */
2806 /* Name         - mono_arch_lowering_pass.                          */
2807 /*                                                                  */
2808 /*------------------------------------------------------------------*/
2809
2810 void
2811 mono_arch_lowering_pass (MonoCompile *cfg, MonoBasicBlock *bb)
2812 {
2813         MonoInst *ins, *next;
2814
2815         MONO_BB_FOR_EACH_INS_SAFE (bb, next, ins) {
2816                 switch (ins->opcode) {
2817                 case OP_DIV_IMM:
2818                 case OP_REM_IMM:
2819                 case OP_IDIV_IMM:
2820                 case OP_IREM_IMM:
2821                 case OP_IDIV_UN_IMM:
2822                 case OP_IREM_UN_IMM:
2823                 case OP_LAND_IMM:
2824                 case OP_LOR_IMM:
2825                 case OP_LREM_IMM:
2826                 case OP_LXOR_IMM:
2827                 case OP_LOCALLOC_IMM:
2828                         mono_decompose_op_imm (cfg, bb, ins);
2829                         break;
2830                 case OP_LADD_IMM:
2831                         if (!s390_is_imm16 (ins->inst_imm))
2832                                 /* This is created by the memcpy code which ignores is_inst_imm */
2833                                 mono_decompose_op_imm (cfg, bb, ins);
2834                         break;
2835                 default:
2836                         break;
2837                 }
2838         }
2839
2840         bb->max_vreg = cfg->next_vreg;
2841 }
2842
2843 /*========================= End of Function ========================*/
2844
2845 /*------------------------------------------------------------------*/
2846 /*                                                                  */
2847 /* Name         - emit_float_to_int                                 */
2848 /*                                                                  */
2849 /* Function     - Create instructions which will convert a floating */
2850 /*                point value to integer.                           */
2851 /*                                                                  */
2852 /*------------------------------------------------------------------*/
2853
2854 static guchar*
2855 emit_float_to_int (MonoCompile *cfg, guchar *code, int dreg, int sreg, int size, gboolean is_signed)
2856 {
2857         /* sreg is a float, dreg is an integer reg. */
2858         if (is_signed) {
2859                 s390_cgdbr (code, dreg, 5, sreg);
2860                 switch (size) {
2861                 case 1:
2862                         s390_ltgr (code, dreg, dreg);
2863                         s390_jnl  (code, 4);
2864                         s390_oill (code, dreg, 0x80);
2865                         s390_lghi (code, s390_r0, 0xff);
2866                         s390_ngr  (code, dreg, s390_r0);
2867                         break;
2868                 case 2:
2869                         s390_ltgr (code, dreg, dreg);
2870                         s390_jnl  (code, 4);
2871                         s390_oill (code, dreg, 0x8000);
2872                         s390_llill(code, s390_r0, 0xffff);
2873                         s390_ngr  (code, dreg, s390_r0);
2874                         break;
2875                 }
2876         } else {
2877                 short *o[1];
2878                 S390_SET    (code, s390_r13, 0x41e0000000000000llu);
2879                 s390_ldgr   (code, s390_f14, s390_r13);
2880                 s390_ldr    (code, s390_f15, sreg);
2881                 s390_cdbr   (code, s390_f15, s390_f14);
2882                 s390_jl     (code, 0); CODEPTR (code, o[0]);
2883                 S390_SET    (code, s390_r13, 0x41f0000000000000llu);
2884                 s390_ldgr   (code, s390_f14, s390_r13);
2885                 s390_sdbr   (code, s390_f15, s390_f14);
2886                 s390_cfdbr  (code, dreg, 7, s390_f15);
2887                 s390_j      (code, 4);
2888                 PTRSLOT (code, o[0]);
2889                 s390_cfdbr  (code, dreg, 5, sreg);
2890                 switch (size) {
2891                 case 1:
2892                         s390_lghi (code, s390_r0, 0xff);
2893                         s390_ngr  (code, dreg, s390_r0);
2894                         break;
2895                 case 2:
2896                         s390_llill(code, s390_r0, 0xffff);
2897                         s390_ngr  (code, dreg, s390_r0);
2898                         break;
2899                 }
2900         }
2901         return code;
2902 }
2903
2904 /*========================= End of Function ========================*/
2905
2906 /*------------------------------------------------------------------*/
2907 /*                                                                  */
2908 /* Name         - gboolean_is_unsigned.                             */
2909 /*                                                                  */
2910 /* Function     - Return TRUE if next opcode is checking for un-    */
2911 /*                signed value.                                     */
2912 /*                                                                  */
2913 /*------------------------------------------------------------------*/
2914
2915 static
2916 gboolean is_unsigned (MonoInst *next)
2917 {
2918         if ((next) &&
2919                 (((next->opcode >= OP_IBNE_UN) &&
2920                   (next->opcode <= OP_IBLT_UN)) ||
2921                  ((next->opcode >= OP_LBNE_UN) &&
2922                   (next->opcode <= OP_LBLT_UN)) ||
2923                  ((next->opcode >= OP_COND_EXC_NE_UN) &&
2924                   (next->opcode <= OP_COND_EXC_LT_UN)) ||
2925                  ((next->opcode >= OP_COND_EXC_INE_UN) &&
2926                   (next->opcode <= OP_COND_EXC_ILT_UN)) ||
2927                  ((next->opcode == OP_CLT_UN) ||
2928                   (next->opcode == OP_CGT_UN)) ||
2929                  ((next->opcode == OP_ICLT_UN) ||
2930                   (next->opcode == OP_ICGT_UN) ||
2931                   (next->opcode == OP_LCLT_UN) ||
2932                   (next->opcode == OP_LCGT_UN))))
2933                 return TRUE;
2934         else
2935                 return FALSE;
2936 }
2937
2938 /*========================= End of Function ========================*/
2939
2940 /*------------------------------------------------------------------*/
2941 /*                                                                  */
2942 /* Name         - mono_arch_output_basic_block                      */
2943 /*                                                                  */
2944 /* Function     - Perform the "real" work of emitting instructions  */
2945 /*                that will do the work of in the basic block.      */
2946 /*                                                                  */
2947 /*------------------------------------------------------------------*/
2948
2949 void
2950 mono_arch_output_basic_block (MonoCompile *cfg, MonoBasicBlock *bb)
2951 {
2952         MonoInst *ins;
2953         MonoCallInst *call;
2954         guint offset;
2955         guint8 *code = cfg->native_code + cfg->code_len;
2956         guint last_offset = 0;
2957         int max_len, src2;
2958
2959         /* we don't align basic blocks of loops on s390 */
2960
2961         if (cfg->verbose_level > 2)
2962                 g_print ("Basic block %d starting at offset 0x%x\n", bb->block_num, bb->native_offset);
2963
2964         if ((cfg->prof_options & MONO_PROFILE_COVERAGE) && cfg->coverage_info) {
2965                 MonoProfileCoverageInfo *cov = cfg->coverage_info;
2966                 g_assert (!mono_compile_aot);
2967                 cov->data [bb->dfn].cil_code = bb->cil_code;
2968                 /* This is not thread save, but good enough */
2969                 S390_SET (code, s390_r1, &cov->data [bb->dfn].count);
2970                 s390_alsi (code, 0, s390_r1, 1);
2971         }
2972
2973         MONO_BB_FOR_EACH_INS (bb, ins) {
2974                 offset = code - cfg->native_code;
2975
2976                 max_len = ((guint8 *)ins_get_spec (ins->opcode))[MONO_INST_LEN];
2977
2978                 if (offset > (cfg->code_size - max_len - 16)) {
2979                         cfg->code_size *= 2;
2980                         cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
2981                         code = cfg->native_code + offset;
2982                 }
2983
2984                 mono_debug_record_line_number (cfg, ins, offset);
2985
2986                 switch (ins->opcode) {
2987                 case OP_STOREI1_MEMBASE_IMM: {
2988                         s390_lghi (code, s390_r0, ins->inst_imm);
2989                         S390_LONG (code, stcy, stc, s390_r0, 0,
2990                                    ins->inst_destbasereg, ins->inst_offset);
2991                 }
2992                         break;
2993                 case OP_STOREI2_MEMBASE_IMM: {
2994                         s390_lghi (code, s390_r0, ins->inst_imm);
2995                         S390_LONG (code, sthy, sth, s390_r0, 0,
2996                                    ins->inst_destbasereg, ins->inst_offset);
2997                 }
2998                         break;
2999                 case OP_STOREI4_MEMBASE_IMM: {
3000                         s390_lgfi (code, s390_r0, ins->inst_imm);
3001                         S390_LONG (code, sty, st, s390_r0, 0,
3002                                    ins->inst_destbasereg, ins->inst_offset);
3003                 }
3004                         break;
3005                 case OP_STORE_MEMBASE_IMM:
3006                 case OP_STOREI8_MEMBASE_IMM: {
3007                         S390_SET (code, s390_r0, ins->inst_imm);
3008                         S390_LONG (code, stg, stg, s390_r0, 0,
3009                                    ins->inst_destbasereg, ins->inst_offset);
3010                 }
3011                         break;
3012                 case OP_STOREI1_MEMBASE_REG: {
3013                         S390_LONG (code, stcy, stc, ins->sreg1, 0,
3014                                    ins->inst_destbasereg, ins->inst_offset);
3015                 }
3016                         break;
3017                 case OP_STOREI2_MEMBASE_REG: {
3018                         S390_LONG (code, sthy, sth, ins->sreg1, 0,
3019                                    ins->inst_destbasereg, ins->inst_offset);
3020                 }
3021                         break;
3022                 case OP_STOREI4_MEMBASE_REG: {
3023                         S390_LONG (code, sty, st, ins->sreg1, 0,
3024                                    ins->inst_destbasereg, ins->inst_offset);
3025                 }
3026                         break;
3027                 case OP_STORE_MEMBASE_REG:
3028                 case OP_STOREI8_MEMBASE_REG: {
3029                         S390_LONG (code, stg, stg, ins->sreg1, 0,
3030                                    ins->inst_destbasereg, ins->inst_offset);
3031                 }
3032                         break;
3033                 case OP_LOADU4_MEM:
3034                         g_assert_not_reached ();
3035                         break;
3036                 case OP_LOAD_MEMBASE:
3037                 case OP_LOADI8_MEMBASE: {
3038                         S390_LONG (code, lg, lg, ins->dreg, 0,
3039                                    ins->inst_basereg, ins->inst_offset);
3040                 }
3041                         break;
3042                 case OP_LOADI4_MEMBASE: {
3043                         S390_LONG (code, lgf, lgf, ins->dreg, 0,
3044                                    ins->inst_basereg, ins->inst_offset);
3045                 }
3046                         break;
3047                 case OP_LOADU4_MEMBASE: {
3048                         S390_LONG (code, llgf, llgf, ins->dreg, 0,
3049                                    ins->inst_basereg, ins->inst_offset);
3050                 }
3051                         break;
3052                 case OP_LOADU1_MEMBASE: {
3053                         S390_LONG (code, llgc, llgc, ins->dreg, 0,
3054                                    ins->inst_basereg, ins->inst_offset);
3055                 }
3056                         break;
3057                 case OP_LOADI1_MEMBASE: {
3058                         S390_LONG (code, lgb, lgb, ins->dreg, 0,
3059                                    ins->inst_basereg, ins->inst_offset);
3060                 }
3061                         break;
3062                 case OP_LOADU2_MEMBASE: {
3063                         S390_LONG (code, llgh, llgh, ins->dreg, 0,
3064                                    ins->inst_basereg, ins->inst_offset);
3065                 }
3066                         break;
3067                 case OP_LOADI2_MEMBASE: {
3068                         S390_LONG (code, lgh, lgh, ins->dreg, 0,
3069                                    ins->inst_basereg, ins->inst_offset);
3070                 }
3071                         break;
3072                 case OP_LCONV_TO_I1: {
3073                         s390_lgbr (code, ins->dreg, ins->sreg1);
3074                 }
3075                         break;
3076                 case OP_LCONV_TO_I2: {
3077                         s390_lghr (code, ins->dreg, ins->sreg1);
3078                 }
3079                         break;
3080                 case OP_LCONV_TO_U1: {
3081                         s390_llgcr (code, ins->dreg, ins->sreg1);
3082                 }
3083                         break;
3084                 case OP_LCONV_TO_U2: {
3085                         s390_llghr (code, ins->dreg, ins->sreg1);
3086                 }
3087                         break;
3088                 case OP_ICONV_TO_I1: {
3089                         s390_lgbr  (code, ins->dreg, ins->sreg1);
3090                 }
3091                         break;
3092                 case OP_ICONV_TO_I2: {
3093                         s390_lghr  (code, ins->dreg, ins->sreg1);
3094                 }
3095                         break;
3096                 case OP_ICONV_TO_U1: {
3097                         s390_llgcr (code, ins->dreg, ins->sreg1);
3098                 }
3099                         break;
3100                 case OP_ICONV_TO_U2: {
3101                         s390_llghr (code, ins->dreg, ins->sreg1);
3102                 }
3103                         break;
3104                 case OP_COMPARE:
3105                 case OP_LCOMPARE: {
3106                         if (is_unsigned (ins->next))
3107                                 s390_clgr (code, ins->sreg1, ins->sreg2);
3108                         else
3109                                 s390_cgr  (code, ins->sreg1, ins->sreg2);
3110                 }
3111                         break;
3112                 case OP_ICOMPARE: {
3113                         if (is_unsigned (ins->next))
3114                                 s390_clr  (code, ins->sreg1, ins->sreg2);
3115                         else
3116                                 s390_cr   (code, ins->sreg1, ins->sreg2);
3117                 }
3118                         break;
3119                 case OP_COMPARE_IMM:
3120                 case OP_LCOMPARE_IMM: {
3121                         S390_SET (code, s390_r0, ins->inst_imm);
3122                         if (is_unsigned (ins->next))
3123                                 s390_clgr (code, ins->sreg1, s390_r0);
3124                         else
3125                                 s390_cgr  (code, ins->sreg1, s390_r0);
3126                 }
3127                         break;
3128                 case OP_ICOMPARE_IMM: {
3129                         S390_SET (code, s390_r0, ins->inst_imm);
3130                         if (is_unsigned (ins->next))
3131                                 s390_clr  (code, ins->sreg1, s390_r0);
3132                         else
3133                                 s390_cr   (code, ins->sreg1, s390_r0);
3134                 }
3135                         break;
3136                 case OP_BREAK: {
3137                         mono_add_patch_info (cfg, code - cfg->native_code, MONO_PATCH_INFO_ABS,
3138                                              mono_break);
3139                         S390_CALL_TEMPLATE (code, s390_r14);
3140                 }
3141                         break;
3142                 case OP_ADDCC: {
3143                         CHECK_SRCDST_COM;
3144                         s390_agr  (code, ins->dreg, src2);
3145                 }
3146                         break;
3147                 case OP_LADD: {
3148                         CHECK_SRCDST_COM;
3149                         s390_agr   (code, ins->dreg, src2);
3150                 }
3151                         break;
3152                 case OP_ADC: {
3153                         CHECK_SRCDST_COM;
3154                         s390_alcgr (code, ins->dreg, src2);
3155                 }
3156                         break;
3157                 case OP_ADD_IMM: {
3158                         if (ins->dreg != ins->sreg1) {
3159                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3160                         }
3161                         if (s390_is_imm16 (ins->inst_imm)) {
3162                                 s390_aghi (code, ins->dreg, ins->inst_imm);
3163                         } else if (s390_is_imm32 (ins->inst_imm)) {
3164                                 s390_agfi (code, ins->dreg, ins->inst_imm);
3165                         } else {
3166                                 S390_SET  (code, s390_r0, ins->inst_imm);
3167                                 s390_agr  (code, ins->dreg, s390_r0);
3168                         }
3169                 }
3170                         break;
3171                 case OP_LADD_IMM: {
3172                         if (ins->dreg != ins->sreg1) {
3173                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3174                         }
3175                         g_assert (s390_is_imm16 (ins->inst_imm));
3176                         s390_aghi (code, ins->dreg, ins->inst_imm);
3177                 }
3178                         break;
3179                 case OP_ADC_IMM: {
3180                         if (ins->dreg != ins->sreg1) {
3181                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3182                         }
3183                         if (s390_is_imm16 (ins->inst_imm)) {
3184                                 s390_lghi  (code, s390_r0, ins->inst_imm);
3185                                 s390_alcgr (code, ins->dreg, s390_r0);
3186                         } else {
3187                                 S390_SET   (code, s390_r0, ins->inst_imm);
3188                                 s390_alcgr (code, ins->dreg, s390_r0);
3189                         }
3190                 }
3191                         break;
3192                 case OP_IADD_OVF:
3193                 case OP_S390_IADD_OVF: {
3194                         CHECK_SRCDST_COM;
3195                         s390_ar    (code, ins->dreg, src2);
3196                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3197                         s390_lgfr  (code, ins->dreg, ins->dreg);
3198                 }
3199                         break;
3200                 case OP_IADD_OVF_UN:
3201                 case OP_S390_IADD_OVF_UN: {
3202                         CHECK_SRCDST_COM;
3203                         s390_algr  (code, ins->dreg, src2);
3204                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
3205                         s390_llgfr (code, ins->dreg, ins->dreg);
3206                 }
3207                         break;
3208                 case OP_ADD_OVF_CARRY: {
3209                         CHECK_SRCDST_COM;
3210                         s390_lghi  (code, s390_r0, 0);
3211                         s390_lgr   (code, s390_r1, s390_r0);
3212                         s390_alcgr (code, s390_r0, s390_r1);
3213                         s390_agr   (code, ins->dreg, src2);
3214                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3215                         s390_agr   (code, ins->dreg, s390_r0);
3216                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3217                 }
3218                         break;
3219                 case OP_ADD_OVF_UN_CARRY: {
3220                         CHECK_SRCDST_COM;
3221                         s390_alcgr (code, ins->dreg, src2);
3222                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
3223                 }
3224                         break;
3225                 case OP_SUBCC: {
3226                         CHECK_SRCDST_NCOM;
3227                         s390_sgr (code, ins->dreg, src2);
3228                 }
3229                         break;
3230                 case OP_LSUB: {
3231                         CHECK_SRCDST_NCOM;
3232                         s390_sgr  (code, ins->dreg, src2);
3233                 }
3234                         break;
3235                 case OP_SBB: {
3236                         CHECK_SRCDST_NCOM;
3237                         s390_slbgr(code, ins->dreg, src2);
3238                 }
3239                         break;
3240                 case OP_SUB_IMM: {
3241                         if (ins->dreg != ins->sreg1) {
3242                                 s390_lgr   (code, ins->dreg, ins->sreg1);
3243                         }
3244                         if (s390_is_imm16 (-ins->inst_imm)) {
3245                                 s390_aghi  (code, ins->dreg, -ins->inst_imm);
3246                         } else if (s390_is_imm32 (-ins->inst_imm)) {
3247                                 s390_slgfi  (code, ins->dreg, ins->inst_imm);
3248                         } else {
3249                                 S390_SET  (code, s390_r0, ins->inst_imm);
3250                                 s390_slgr (code, ins->dreg, s390_r0);
3251                         }
3252                 }
3253                         break;
3254                 case OP_LSUB_IMM: {
3255                         if (ins->dreg != ins->sreg1) {
3256                                 s390_lgr   (code, ins->dreg, ins->sreg1);
3257                         }
3258                         if (s390_is_imm16 (-ins->inst_imm)) {
3259                                 s390_aghi  (code, ins->dreg, -ins->inst_imm);
3260                         } else if (s390_is_imm32 (-ins->inst_imm)) {
3261                                 s390_slgfi (code, ins->dreg, ins->inst_imm);
3262                         } else {
3263                                 S390_SET  (code, s390_r0, ins->inst_imm);
3264                                 s390_slgr (code, ins->dreg, s390_r0);
3265                         }
3266                 }
3267                         break;
3268                 case OP_SBB_IMM: {
3269                         if (ins->dreg != ins->sreg1) {
3270                                 s390_lgr   (code, ins->dreg, ins->sreg1);
3271                         }
3272                         if (s390_is_imm16 (-ins->inst_imm)) {
3273                                 s390_lghi  (code, s390_r0, ins->inst_imm);
3274                                 s390_slbgr (code, ins->dreg, s390_r0);
3275                         } else {
3276                                 S390_SET  (code, s390_r0, ins->inst_imm);
3277                                 s390_slbgr(code, ins->dreg, s390_r0);
3278                         }
3279                 }
3280                         break;
3281                 case OP_SUB_OVF_CARRY: {
3282                         CHECK_SRCDST_NCOM;
3283                         s390_lghi  (code, s390_r0, 0);
3284                         s390_lgr   (code, s390_r1, s390_r0);
3285                         s390_slbgr (code, s390_r0, s390_r1);
3286                         s390_sgr   (code, ins->dreg, src2);
3287                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3288                         s390_agr   (code, ins->dreg, s390_r0);
3289                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3290                 }
3291                         break;
3292                 case OP_SUB_OVF_UN_CARRY: {
3293                         CHECK_SRCDST_NCOM;
3294                         s390_slbgr (code, ins->dreg, src2);
3295                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
3296                 }
3297                         break;
3298                 case OP_LAND: {
3299                         if (ins->sreg1 == ins->dreg) {
3300                                 s390_ngr  (code, ins->dreg, ins->sreg2);
3301                         }
3302                         else {
3303                                 if (ins->sreg2 == ins->dreg) {
3304                                         s390_ngr (code, ins->dreg, ins->sreg1);
3305                                 }
3306                                 else {
3307                                         s390_lgr (code, ins->dreg, ins->sreg1);
3308                                         s390_ngr (code, ins->dreg, ins->sreg2);
3309                                 }
3310                         }
3311                 }
3312                         break;
3313                 case OP_AND_IMM: {
3314                         if (ins->dreg != ins->sreg1) {
3315                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3316                         }
3317                         S390_SET_MASK (code, s390_r0, ins->inst_imm);
3318                         s390_ngr (code, ins->dreg, s390_r0);
3319                 }
3320                         break;
3321                 case OP_LDIV: {
3322                         s390_lgr  (code, s390_r1, ins->sreg1);
3323                         s390_dsgr (code, s390_r0, ins->sreg2);
3324                         s390_lgr  (code, ins->dreg, s390_r1);
3325                 }
3326                         break;
3327                 case OP_LDIV_UN: {
3328                         s390_lgr   (code, s390_r1, ins->sreg1);
3329                         s390_lghi  (code, s390_r0, 0);
3330                         s390_dlgr  (code, s390_r0, ins->sreg2);
3331                         s390_lgr   (code, ins->dreg, s390_r1);
3332                 }
3333                         break;
3334                 case OP_LREM: {
3335                         s390_lgr  (code, s390_r1, ins->sreg1);
3336                         s390_dsgr (code, s390_r0, ins->sreg2);
3337                         s390_lgr  (code, ins->dreg, s390_r0);
3338                         break;
3339                 }
3340                 case OP_LREM_IMM: {
3341                         if (s390_is_imm16 (ins->inst_imm)) {
3342                                 s390_lghi (code, s390_r13, ins->inst_imm);
3343                         } else {
3344                                 s390_lgfi (code, s390_r13, ins->inst_imm);
3345                         }
3346                         s390_lgr  (code, s390_r0, ins->sreg1);
3347                         s390_dsgr (code, s390_r0, s390_r13);
3348                         s390_lgfr (code, ins->dreg, s390_r0);
3349                 }
3350                         break;
3351                 case OP_LREM_UN: {
3352                         s390_lgr   (code, s390_r1, ins->sreg1);
3353                         s390_lghi  (code, s390_r0, 0);
3354                         s390_dlgr  (code, s390_r0, ins->sreg2);
3355                         s390_lgr   (code, ins->dreg, s390_r0);
3356                 }
3357                         break;
3358                 case OP_LOR: {
3359                         if (ins->sreg1 == ins->dreg) {
3360                                 s390_ogr  (code, ins->dreg, ins->sreg2);
3361                         }
3362                         else {
3363                                 if (ins->sreg2 == ins->dreg) {
3364                                         s390_ogr (code, ins->dreg, ins->sreg1);
3365                                 }
3366                                 else {
3367                                         s390_lgr (code, ins->dreg, ins->sreg1);
3368                                         s390_ogr (code, ins->dreg, ins->sreg2);
3369                                 }
3370                         }
3371                 }
3372                         break;
3373                 case OP_OR_IMM: {
3374                         if (ins->dreg != ins->sreg1) {
3375                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3376                         }
3377                         S390_SET_MASK(code, s390_r0, ins->inst_imm);
3378                         s390_ogr (code, ins->dreg, s390_r0);
3379                 }
3380                         break;
3381                 case OP_LXOR: {
3382                         if (ins->sreg1 == ins->dreg) {
3383                                 s390_xgr  (code, ins->dreg, ins->sreg2);
3384                         }
3385                         else {
3386                                 if (ins->sreg2 == ins->dreg) {
3387                                         s390_xgr (code, ins->dreg, ins->sreg1);
3388                                 }
3389                                 else {
3390                                         s390_lgr (code, ins->dreg, ins->sreg1);
3391                                         s390_xgr (code, ins->dreg, ins->sreg2);
3392                                 }
3393                         }
3394                 }
3395                         break;
3396                 case OP_XOR_IMM: {
3397                         if (ins->dreg != ins->sreg1) {
3398                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3399                         }
3400                         S390_SET_MASK (code, s390_r0, ins->inst_imm);
3401                         s390_xgr (code, ins->dreg, s390_r0);
3402                 }
3403                         break;
3404                 case OP_LSHL: {
3405                         CHECK_SRCDST_NCOM;
3406                         s390_sllg (code, ins->dreg, ins->dreg, src2, 0);
3407                 }
3408                         break;
3409                 case OP_SHL_IMM:
3410                 case OP_LSHL_IMM: {
3411                         if (ins->sreg1 != ins->dreg) {
3412                                 s390_lgr   (code, ins->dreg, ins->sreg1);
3413                         }
3414                         s390_sllg (code, ins->dreg, ins->dreg, 0, (ins->inst_imm & 0x3f));
3415                 }
3416                         break;
3417                 case OP_LSHR: {
3418                         CHECK_SRCDST_NCOM;
3419                         s390_srag  (code, ins->dreg, ins->dreg, src2, 0);
3420                 }
3421                         break;
3422                 case OP_SHR_IMM:
3423                 case OP_LSHR_IMM: {
3424                         if (ins->sreg1 != ins->dreg) {
3425                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3426                         }
3427                         s390_srag  (code, ins->dreg, ins->dreg, 0, (ins->inst_imm & 0x3f));
3428                 }
3429                         break;
3430                 case OP_SHR_UN_IMM:
3431                 case OP_LSHR_UN_IMM: {
3432                         if (ins->sreg1 != ins->dreg) {
3433                                 s390_lgr   (code, ins->dreg, ins->sreg1);
3434                         }
3435                         s390_srlg (code, ins->dreg, ins->dreg, 0, (ins->inst_imm & 0x3f));
3436                 }
3437                         break;
3438                 case OP_LSHR_UN: {
3439                         CHECK_SRCDST_NCOM;
3440                         s390_srlg (code, ins->dreg, ins->dreg, src2, 0);
3441                 }
3442                         break;
3443                 case OP_LNOT: {
3444                         if (ins->sreg1 != ins->dreg) {
3445                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3446                         }
3447                         s390_lghi (code, s390_r0, -1);
3448                         s390_xgr  (code, ins->dreg, s390_r0);
3449                 }
3450                         break;
3451                 case OP_LNEG: {
3452                         s390_lcgr (code, ins->dreg, ins->sreg1);
3453                 }
3454                         break;
3455                 case OP_LMUL: {
3456                         CHECK_SRCDST_COM;
3457                         s390_msgr (code, ins->dreg, src2);
3458                 }
3459                         break;
3460                 case OP_MUL_IMM:
3461                 case OP_LMUL_IMM: {
3462                         if (ins->dreg != ins->sreg1) {
3463                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3464                         }
3465                         if (s390_is_imm16 (ins->inst_imm)) {
3466                                 s390_lghi (code, s390_r13, ins->inst_imm);
3467                         } else if (s390_is_imm32 (ins->inst_imm)) {
3468                                 s390_lgfi (code, s390_r13, ins->inst_imm);
3469                         } else {
3470                                 S390_SET (code, s390_r13, ins->inst_imm);
3471                         }
3472                         s390_msgr (code, ins->dreg, s390_r13);
3473                 }
3474                         break;
3475                 case OP_LMUL_OVF: {
3476                         short int *o[2];
3477                         s390_ltgr (code, s390_r1, ins->sreg1);
3478                         s390_jz   (code, 0); CODEPTR(code, o[0]);
3479                         s390_ltgr (code, s390_r0, ins->sreg2);
3480                         s390_jnz  (code, 6);
3481                         s390_lghi (code, s390_r1, 0);
3482                         s390_j    (code, 0); CODEPTR(code, o[1]);
3483                         s390_xgr  (code, s390_r0, s390_r1);
3484                         s390_msgr (code, s390_r1, ins->sreg2);
3485                         s390_xgr  (code, s390_r0, s390_r1);
3486                         s390_srlg (code, s390_r0, s390_r0, 0, 63);
3487                         s390_ltgr (code, s390_r0, s390_r0);
3488                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3489                         PTRSLOT   (code, o[0]);
3490                         PTRSLOT   (code, o[1]);
3491                         s390_lgr  (code, ins->dreg, s390_r1);
3492                 }
3493                         break;
3494                 case OP_LMUL_OVF_UN: {
3495                         s390_lghi  (code, s390_r0, 0);
3496                         s390_lgr   (code, s390_r1, ins->sreg1);
3497                         s390_mlgr  (code, s390_r0, ins->sreg2);
3498                         s390_ltgr  (code, s390_r0, s390_r0);
3499                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3500                         s390_lgr   (code, ins->dreg, s390_r1);
3501                 }
3502                         break;
3503                 case OP_IADDCC: {
3504                         g_assert_not_reached ();
3505                         CHECK_SRCDST_COM_I;
3506                         s390_algr (code, ins->dreg, src2);
3507                 }
3508                         break;
3509                 case OP_IADD: {
3510                         CHECK_SRCDST_COM_I;
3511                         s390_agr  (code, ins->dreg, src2);
3512                 }
3513                         break;
3514                 case OP_IADC: {
3515                         g_assert_not_reached ();
3516                         CHECK_SRCDST_COM_I;
3517                         s390_alcgr (code, ins->dreg, src2);
3518                 }
3519                         break;
3520                 case OP_IADD_IMM: {
3521                         if (ins->dreg != ins->sreg1) {
3522                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3523                         }
3524                         if (s390_is_imm16 (ins->inst_imm)) {
3525                                 s390_aghi (code, ins->dreg, ins->inst_imm);
3526                         } else {
3527                                 s390_afi  (code, ins->dreg, ins->inst_imm);
3528                         }
3529                 }
3530                         break;
3531                 case OP_IADC_IMM: {
3532                         if (ins->dreg != ins->sreg1) {
3533                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3534                         }
3535                         if (s390_is_imm16 (ins->inst_imm)) {
3536                                 s390_lghi  (code, s390_r0, ins->inst_imm);
3537                                 s390_alcgr (code, ins->dreg, s390_r0);
3538                         } else {
3539                                 S390_SET   (code, s390_r0, ins->inst_imm);
3540                                 s390_alcgr (code, ins->dreg, s390_r0);
3541                         }
3542                 }
3543                         break;
3544                 case OP_LADD_OVF:
3545                 case OP_S390_LADD_OVF: {
3546                         CHECK_SRCDST_COM;
3547                         s390_agr    (code, ins->dreg, src2);
3548                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3549                 }
3550                         break;
3551                 case OP_LADD_OVF_UN:
3552                 case OP_S390_LADD_OVF_UN: {
3553                         CHECK_SRCDST_COM;
3554                         s390_algr  (code, ins->dreg, src2);
3555                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
3556                 }
3557                         break;
3558                 case OP_ISUBCC: {
3559                         CHECK_SRCDST_NCOM_I;
3560                         s390_slgr (code, ins->dreg, src2);
3561                 }
3562                         break;
3563                 case OP_ISUB: {
3564                         CHECK_SRCDST_NCOM_I;
3565                         s390_sgr  (code, ins->dreg, src2);
3566                 }
3567                         break;
3568                 case OP_ISBB: {
3569                         CHECK_SRCDST_NCOM_I;
3570                         s390_slbgr (code, ins->dreg, src2);
3571                 }
3572                         break;
3573                 case OP_ISUB_IMM: {
3574                         if (ins->dreg != ins->sreg1) {
3575                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3576                         }
3577                         if (s390_is_imm16 (-ins->inst_imm)) {
3578                                 s390_aghi (code, ins->dreg, -ins->inst_imm);
3579                         } else {
3580                                 s390_agfi (code, ins->dreg, -ins->inst_imm);
3581                         }
3582                 }
3583                         break;
3584                 case OP_ISBB_IMM: {
3585                         S390_SET (code, s390_r0, ins->inst_imm);
3586                         s390_slgfr (code, ins->dreg, s390_r0);
3587                 }
3588                         break;
3589                 case OP_ISUB_OVF:
3590                 case OP_S390_ISUB_OVF: {
3591                         CHECK_SRCDST_NCOM;
3592                         s390_sr   (code, ins->dreg, src2);
3593                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3594                         s390_lgfr (code, ins->dreg, ins->dreg);
3595                 }
3596                         break;
3597                 case OP_ISUB_OVF_UN:
3598                 case OP_S390_ISUB_OVF_UN: {
3599                         CHECK_SRCDST_NCOM;
3600                         s390_slr  (code, ins->dreg, src2);
3601                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
3602                         s390_llgfr(code, ins->dreg, ins->dreg);
3603                 }
3604                         break;
3605                 case OP_LSUB_OVF:
3606                 case OP_S390_LSUB_OVF: {
3607                         CHECK_SRCDST_NCOM;
3608                         s390_sgr   (code, ins->dreg, src2);
3609                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3610                 }
3611                         break;
3612                 case OP_LSUB_OVF_UN:
3613                 case OP_S390_LSUB_OVF_UN: {
3614                         CHECK_SRCDST_NCOM;
3615                         s390_slgr  (code, ins->dreg, src2);
3616                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
3617                 }
3618                         break;
3619                 case OP_IAND: {
3620                         CHECK_SRCDST_NCOM_I;
3621                         s390_ngr (code, ins->dreg, src2);
3622                 }
3623                         break;
3624                 case OP_IAND_IMM: {
3625                         if (ins->dreg != ins->sreg1) {
3626                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3627                         }
3628                         S390_SET_MASK (code, s390_r0, ins->inst_imm);
3629                         s390_ngr  (code, ins->dreg, s390_r0);
3630                 }
3631                         break;
3632                 case OP_IDIV: {
3633                         s390_lgfr (code, s390_r0, ins->sreg1);
3634                         s390_srda (code, s390_r0, 0, 32);
3635                         s390_dr   (code, s390_r0, ins->sreg2);
3636                         s390_lgfr (code, ins->dreg, s390_r1);
3637                 }
3638                         break;
3639                 case OP_IDIV_UN: {
3640                         s390_lgfr (code, s390_r0, ins->sreg1);
3641                         s390_srdl (code, s390_r0, 0, 32);
3642                         s390_dlr  (code, s390_r0, ins->sreg2);
3643                         s390_lgfr (code, ins->dreg, s390_r1);
3644                 }
3645                         break;
3646                 case OP_IDIV_IMM: {
3647                         if (s390_is_imm16 (ins->inst_imm)) {
3648                                 s390_lghi (code, s390_r13, ins->inst_imm);
3649                         } else {
3650                                 s390_lgfi (code, s390_r13, ins->inst_imm);
3651                         }
3652                         s390_lgfr (code, s390_r0, ins->sreg1);
3653                         s390_srda (code, s390_r0, 0, 32);
3654                         s390_dr   (code, s390_r0, ins->sreg2);
3655                         s390_lgfr (code, ins->dreg, s390_r1);
3656                 }
3657                         break;
3658                 case OP_IREM: {
3659                         s390_lgfr (code, s390_r0, ins->sreg1);
3660                         s390_srda (code, s390_r0, 0, 32);
3661                         s390_dr   (code, s390_r0, ins->sreg2);
3662                         s390_lgfr (code, ins->dreg, s390_r0);
3663                         break;
3664                 case OP_IREM_UN:
3665                         s390_lgfr (code, s390_r0, ins->sreg1);
3666                         s390_srdl (code, s390_r0, 0, 32);
3667                         s390_dlr  (code, s390_r0, ins->sreg2);
3668                         s390_lgfr (code, ins->dreg, s390_r0);
3669                 }
3670                         break;
3671                 case OP_IREM_IMM: {
3672                         if (s390_is_imm16 (ins->inst_imm)) {
3673                                 s390_lghi (code, s390_r13, ins->inst_imm);
3674                         } else {
3675                                 s390_lgfi (code, s390_r13, ins->inst_imm);
3676                         }
3677                         s390_lgfr (code, s390_r0, ins->sreg1);
3678                         s390_srda (code, s390_r0, 0, 32);
3679                         s390_dr   (code, s390_r0, ins->sreg2);
3680                         s390_lgfr (code, ins->dreg, s390_r0);
3681                 }
3682                         break;
3683                 case OP_IOR: {
3684                         CHECK_SRCDST_COM_I;
3685                         s390_ogr (code, ins->dreg, src2);
3686                 }
3687                         break;
3688                 case OP_IOR_IMM: {
3689                         if (ins->dreg != ins->sreg1) {
3690                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3691                         }
3692                         S390_SET_MASK (code, s390_r0, ins->inst_imm);
3693                         s390_ogr  (code, ins->dreg, s390_r0);
3694                 }
3695                         break;
3696                 case OP_IXOR: {
3697                         CHECK_SRCDST_COM_I;
3698                         s390_xgr (code, ins->dreg, src2);
3699                 }
3700                         break;
3701                 case OP_IXOR_IMM: {
3702                         if (ins->dreg != ins->sreg1) {
3703                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3704                         }
3705                         S390_SET_MASK (code, s390_r0, ins->inst_imm);
3706                         s390_xgr  (code, ins->dreg, s390_r0);
3707                 }
3708                         break;
3709                 case OP_ISHL: {
3710                         CHECK_SRCDST_NCOM;
3711                         s390_sll  (code, ins->dreg, src2, 0);
3712                 }
3713                         break;
3714                 case OP_ISHL_IMM: {
3715                         if (ins->sreg1 != ins->dreg) {
3716                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3717                         }
3718                         s390_sll (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3719                 }
3720                         break;
3721                 case OP_ISHR: {
3722                         CHECK_SRCDST_NCOM;
3723                         s390_sra (code, ins->dreg, src2, 0);
3724                 }
3725                         break;
3726                 case OP_ISHR_IMM: {
3727                         if (ins->sreg1 != ins->dreg) {
3728                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3729                         }
3730                         s390_sra (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3731                 }
3732                         break;
3733                 case OP_ISHR_UN_IMM: {
3734                         if (ins->sreg1 != ins->dreg) {
3735                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3736                         }
3737                         s390_srl (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3738                 }
3739                         break;
3740                 case OP_ISHR_UN: {
3741                         CHECK_SRCDST_NCOM;
3742                         s390_srl  (code, ins->dreg, src2, 0);
3743                 }
3744                         break;
3745                 case OP_INOT: {
3746                         if (ins->sreg1 != ins->dreg) {
3747                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3748                         }
3749                         s390_lghi (code, s390_r0, -1);
3750                         s390_xgr  (code, ins->dreg, s390_r0);
3751                 }
3752                         break;
3753                 case OP_INEG: {
3754                         s390_lcgr (code, ins->dreg, ins->sreg1);
3755                 }
3756                         break;
3757                 case OP_IMUL: {
3758                         CHECK_SRCDST_COM_I;
3759                         s390_msr (code, ins->dreg, src2);
3760                 }
3761                         break;
3762                 case OP_IMUL_IMM: {
3763                         if (ins->dreg != ins->sreg1) {
3764                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3765                         }
3766                         if (s390_is_imm16 (ins->inst_imm)) {
3767                                 s390_lghi (code, s390_r0, ins->inst_imm);
3768                         } else {
3769                                 s390_lgfi (code, s390_r0, ins->inst_imm);
3770                         }
3771                         s390_msr  (code, ins->dreg, s390_r0);
3772                 }
3773                         break;
3774                 case OP_IMUL_OVF: {
3775                         short int *o[2];
3776                         s390_ltr  (code, s390_r1, ins->sreg1);
3777                         s390_jz   (code, 0); CODEPTR(code, o[0]);
3778                         s390_ltr  (code, s390_r0, ins->sreg2);
3779                         s390_jnz  (code, 6);
3780                         s390_lhi  (code, s390_r1, 0);
3781                         s390_j    (code, 0); CODEPTR(code, o[1]);
3782                         s390_xr   (code, s390_r0, s390_r1);
3783                         s390_msr  (code, s390_r1, ins->sreg2);
3784                         s390_xr   (code, s390_r0, s390_r1);
3785                         s390_srl  (code, s390_r0, 0, 31);
3786                         s390_ltr  (code, s390_r0, s390_r0);
3787                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3788                         PTRSLOT   (code, o[0]);
3789                         PTRSLOT   (code, o[1]);
3790                         s390_lgfr (code, ins->dreg, s390_r1);
3791                 }
3792                         break;
3793                 case OP_IMUL_OVF_UN: {
3794                         s390_lhi  (code, s390_r0, 0);
3795                         s390_lr   (code, s390_r1, ins->sreg1);
3796                         s390_mlr  (code, s390_r0, ins->sreg2);
3797                         s390_ltr  (code, s390_r0, s390_r0);
3798                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3799                         s390_lgfr (code, ins->dreg, s390_r1);
3800                 }
3801                         break;
3802                 case OP_ICONST:
3803                 case OP_I8CONST: {
3804                         S390_SET (code, ins->dreg, ins->inst_c0);
3805                 }
3806                         break;
3807                 case OP_AOTCONST: {
3808                         mono_add_patch_info (cfg, code - cfg->native_code,
3809                                 (MonoJumpInfoType)ins->inst_i1, ins->inst_p0);
3810                         S390_LOAD_TEMPLATE (code, ins->dreg);
3811                 }
3812                         break;
3813                 case OP_JUMP_TABLE: {
3814                         mono_add_patch_info (cfg, code - cfg->native_code,
3815                                 (MonoJumpInfoType)ins->inst_i1, ins->inst_p0);
3816                         S390_LOAD_TEMPLATE (code, ins->dreg);
3817                 }
3818                         break;
3819                 case OP_MOVE:
3820                         if (ins->dreg != ins->sreg1) {
3821                                 s390_lgr (code, ins->dreg, ins->sreg1);
3822                         }
3823                         break;
3824                 case OP_LCONV_TO_I:
3825                 case OP_LCONV_TO_I8:
3826                 case OP_SEXT_I4:
3827                         s390_lgfr (code, ins->dreg, ins->sreg1);
3828                         break;
3829                 case OP_LCONV_TO_I4:
3830                         s390_lgfr (code, ins->dreg, ins->sreg1);
3831                         break;
3832                 case OP_LCONV_TO_U:
3833                 case OP_LCONV_TO_U8:
3834                 case OP_LCONV_TO_U4:
3835                 case OP_ZEXT_I4:
3836                         s390_llgfr (code, ins->dreg, ins->sreg1);
3837                         break;
3838                 case OP_LCONV_TO_OVF_U4:
3839                         S390_SET  (code, s390_r0, 4294967295);
3840                         s390_clgr (code, ins->sreg1, s390_r0);
3841                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GT, "OverflowException");
3842                         s390_ltgr (code, ins->sreg1, ins->sreg1);
3843                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, "OverflowException");
3844                         s390_llgfr(code, ins->dreg, ins->sreg1);
3845                         break;
3846                 case OP_LCONV_TO_OVF_I4_UN:
3847                         S390_SET  (code, s390_r0, 2147483647);
3848                         s390_cgr  (code, ins->sreg1, s390_r0);
3849                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GT, "OverflowException");
3850                         s390_ltgr (code, ins->sreg1, ins->sreg1);
3851                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, "OverflowException");
3852                         s390_lgfr (code, ins->dreg, ins->sreg1);
3853                         break;
3854                 case OP_FMOVE:
3855                         if (ins->dreg != ins->sreg1) {
3856                                 s390_ldr   (code, ins->dreg, ins->sreg1);
3857                         }
3858                         break;
3859                 case OP_MOVE_F_TO_I8:
3860                         s390_lgdr (code, ins->dreg, ins->sreg1);
3861                         break;
3862                 case OP_MOVE_I8_TO_F:
3863                         s390_ldgr (code, ins->dreg, ins->sreg1);
3864                         break;
3865                 case OP_MOVE_F_TO_I4:
3866                         s390_lgdr (code, ins->dreg, ins->sreg1);
3867                         break;
3868                 case OP_MOVE_I4_TO_F:
3869                         s390_lgfr (code, s390_r0, ins->sreg1);
3870                         s390_ldgr (code, ins->dreg, s390_r0);
3871                         break;
3872                 case OP_FCONV_TO_R4:
3873                         s390_ledbr (code, ins->dreg, ins->sreg1);
3874                         s390_ldebr (code, ins->dreg, ins->dreg);
3875                         break;
3876                 case OP_S390_SETF4RET:
3877                         s390_ledbr (code, ins->dreg, ins->sreg1);
3878                         break;
3879                 case OP_TLS_GET: {
3880                         if (s390_is_imm16 (ins->inst_offset)) {
3881                                 s390_lghi (code, s390_r13, ins->inst_offset);
3882                         } else if (s390_is_imm32 (ins->inst_offset)) {
3883                                 s390_lgfi (code, s390_r13, ins->inst_offset);
3884                         } else {
3885                                 S390_SET  (code, s390_r13, ins->inst_offset);
3886                         }
3887                         s390_ear (code, s390_r1, 0);
3888                         s390_sllg(code, s390_r1, s390_r1, 0, 32);
3889                         s390_ear (code, s390_r1, 1);
3890                         s390_lg  (code, ins->dreg, s390_r13, s390_r1, 0);
3891                 }
3892                         break;
3893                 case OP_JMP: {
3894                         if (cfg->method->save_lmf)
3895                                 restoreLMF(code, cfg->frame_reg, cfg->stack_usage);
3896
3897                         if (cfg->flags & MONO_CFG_HAS_TAIL) {
3898                                 code =  emit_load_volatile_arguments (code, cfg);
3899                         }
3900
3901                         code = backUpStackPtr(cfg, code);
3902                         s390_lg  (code, s390_r14, 0, cfg->frame_reg, S390_RET_ADDR_OFFSET);
3903                         mono_add_patch_info (cfg, code - cfg->native_code,
3904                                              MONO_PATCH_INFO_METHOD_JUMP,
3905                                              ins->inst_p0);
3906                         s390_jcl (code, S390_CC_UN, 0);
3907                 }
3908                         break;
3909                 case OP_CHECK_THIS: {
3910                         /* ensure ins->sreg1 is not NULL */
3911                         s390_lg   (code, s390_r0, 0, ins->sreg1, 0);
3912                         s390_ltgr (code, s390_r0, s390_r0);
3913 //                      EMIT_COND_SYSTEM_EXCEPTION (S390_CC_ZR, "NullReferenceException");
3914                 }
3915                         break;
3916                 case OP_ARGLIST: {
3917                         int offset = cfg->sig_cookie + cfg->stack_usage;
3918
3919                         if (s390_is_imm16 (offset)) {
3920                                 s390_lghi (code, s390_r0, offset);
3921                         } else if (s390_is_imm32 (offset)) {
3922                                 s390_lgfi (code, s390_r0, offset);
3923                         } else {
3924                                 S390_SET  (code, s390_r0, offset);
3925                         }
3926                         s390_agr  (code, s390_r0, cfg->frame_reg);
3927                         s390_stg  (code, s390_r0, 0, ins->sreg1, 0);
3928                 }
3929                         break;
3930                 case OP_FCALL: {
3931                         call = (MonoCallInst*)ins;
3932                         if (ins->flags & MONO_INST_HAS_METHOD)
3933                                 mono_add_patch_info (cfg, code-cfg->native_code,
3934                                                      MONO_PATCH_INFO_METHOD,
3935                                                      call->method);
3936                         else
3937                                 mono_add_patch_info (cfg, code-cfg->native_code,
3938                                                      MONO_PATCH_INFO_ABS,
3939                                                      call->fptr);
3940                         S390_CALL_TEMPLATE (code, s390_r14);
3941                         if (call->signature->ret->type == MONO_TYPE_R4)
3942                                 s390_ldebr (code, s390_f0, s390_f0);
3943                 }
3944                         break;
3945                 case OP_LCALL:
3946                 case OP_VCALL:
3947                 case OP_VCALL2:
3948                 case OP_VOIDCALL:
3949                 case OP_CALL: {
3950                         call = (MonoCallInst*)ins;
3951                         if (ins->flags & MONO_INST_HAS_METHOD)
3952                                 mono_add_patch_info (cfg, code-cfg->native_code,
3953                                                      MONO_PATCH_INFO_METHOD,
3954                                                      call->method);
3955                         else
3956                                 mono_add_patch_info (cfg, code-cfg->native_code,
3957                                                      MONO_PATCH_INFO_ABS,
3958                                                      call->fptr);
3959                         S390_CALL_TEMPLATE (code, s390_r14);
3960                 }
3961                         break;
3962                 case OP_FCALL_REG: {
3963                         call = (MonoCallInst*)ins;
3964                         s390_lgr  (code, s390_r1, ins->sreg1);
3965                         s390_basr (code, s390_r14, s390_r1);
3966                         if (call->signature->ret->type == MONO_TYPE_R4)
3967                                 s390_ldebr (code, s390_f0, s390_f0);
3968                 }
3969                         break;
3970                 case OP_LCALL_REG:
3971                 case OP_VCALL_REG:
3972                 case OP_VCALL2_REG:
3973                 case OP_VOIDCALL_REG:
3974                 case OP_CALL_REG: {
3975                         s390_lgr  (code, s390_r1, ins->sreg1);
3976                         s390_basr (code, s390_r14, s390_r1);
3977                 }
3978                         break;
3979                 case OP_FCALL_MEMBASE: {
3980                         call = (MonoCallInst*)ins;
3981                         s390_lg   (code, s390_r1, 0, ins->sreg1, ins->inst_offset);
3982                         s390_basr (code, s390_r14, s390_r1);
3983                         if (call->signature->ret->type == MONO_TYPE_R4)
3984                                 s390_ldebr (code, s390_f0, s390_f0);
3985                 }
3986                         break;
3987                 case OP_LCALL_MEMBASE:
3988                 case OP_VCALL_MEMBASE:
3989                 case OP_VCALL2_MEMBASE:
3990                 case OP_VOIDCALL_MEMBASE:
3991                 case OP_CALL_MEMBASE: {
3992                         s390_lg   (code, s390_r1, 0, ins->sreg1, ins->inst_offset);
3993                         s390_basr (code, s390_r14, s390_r1);
3994                 }
3995                         break;
3996                 case OP_LOCALLOC: {
3997                         int alloca_skip;
3998                         int area_offset;
3999
4000                         if (cfg->param_area == 0)
4001                                 alloca_skip = S390_MINIMAL_STACK_SIZE;
4002                         else
4003                                 alloca_skip = cfg->param_area;
4004
4005                         area_offset = S390_ALIGN(alloca_skip, S390_STACK_ALIGNMENT);
4006                         s390_lgr  (code, s390_r1, ins->sreg1);
4007                         if (ins->flags & MONO_INST_INIT)
4008                                 s390_lgr  (code, s390_r0, ins->sreg1);
4009                         s390_aghi (code, s390_r1, 14);
4010                         s390_srlg (code, s390_r1, s390_r1, 0, 3);
4011                         s390_sllg (code, s390_r1, s390_r1, 0, 3);
4012                         if (cfg->method->save_lmf) {
4013                                 /*----------------------------------*/
4014                                 /* we have to adjust lmf ebp value  */
4015                                 /*----------------------------------*/
4016                                 int lmfOffset = cfg->stack_usage - sizeof(MonoLMF);
4017
4018                                 s390_lgr (code, s390_r13, cfg->frame_reg);
4019                                 if (s390_is_imm16(lmfOffset)) {
4020                                         s390_aghi (code, s390_r13, lmfOffset);
4021                                 } else if (s390_is_imm32(lmfOffset)) {
4022                                         s390_agfi (code, s390_r13, lmfOffset);
4023                                 } else {
4024                                         S390_SET  (code, s390_r13, lmfOffset);
4025                                 }
4026                                 s390_lgr (code, s390_r14, STK_BASE);
4027                                 s390_sgr (code, s390_r14, s390_r1);
4028                                 s390_stg (code, s390_r14, 0, s390_r13,
4029                                           G_STRUCT_OFFSET(MonoLMF, ebp));
4030                         }
4031                         s390_lg   (code, s390_r13, 0, STK_BASE, 0);
4032                         s390_sgr  (code, STK_BASE, s390_r1);
4033                         s390_stg  (code, s390_r13, 0, STK_BASE, 0);
4034                         s390_la   (code, ins->dreg, 0, STK_BASE, area_offset);
4035                         s390_srlg (code, ins->dreg, ins->dreg, 0, 3);
4036                         s390_sllg (code, ins->dreg, ins->dreg, 0, 3);
4037                         if (ins->flags & MONO_INST_INIT) {
4038                                 s390_lgr  (code, s390_r1, s390_r0);
4039                                 s390_lgr  (code, s390_r0, ins->dreg);
4040                                 s390_lgr  (code, s390_r14, s390_r12);
4041                                 s390_lghi (code, s390_r13, 0);
4042                                 s390_mvcle(code, s390_r0, s390_r12, 0, 0);
4043                                 s390_jo   (code, -2);
4044                                 s390_lgr  (code, s390_r12, s390_r14);
4045                         }
4046                 }
4047                         break;
4048                 case OP_THROW: {
4049                         s390_lgr  (code, s390_r2, ins->sreg1);
4050                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD,
4051                                              (gpointer) "mono_arch_throw_exception");
4052                         S390_CALL_TEMPLATE(code, s390_r14);
4053                 }
4054                         break;
4055                 case OP_RETHROW: {
4056                         s390_lgr  (code, s390_r2, ins->sreg1);
4057                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD,
4058                                              (gpointer) "mono_arch_rethrow_exception");
4059                         S390_CALL_TEMPLATE(code, s390_r14);
4060                 }
4061                         break;
4062                 case OP_START_HANDLER: {
4063                         MonoInst *spvar = mono_find_spvar_for_region (cfg, bb->region);
4064
4065                         S390_LONG (code, stg, stg, s390_r14, 0,
4066                                    spvar->inst_basereg,
4067                                    spvar->inst_offset);
4068                 }
4069                         break;
4070                 case OP_ENDFILTER: {
4071                         MonoInst *spvar = mono_find_spvar_for_region (cfg, bb->region);
4072
4073                         if (ins->sreg1 != s390_r2)
4074                                 s390_lgr(code, s390_r2, ins->sreg1);
4075                         S390_LONG (code, lg, lg, s390_r14, 0,
4076                                    spvar->inst_basereg,
4077                                    spvar->inst_offset);
4078                         s390_br  (code, s390_r14);
4079                 }
4080                         break;
4081                 case OP_ENDFINALLY: {
4082                         MonoInst *spvar = mono_find_spvar_for_region (cfg, bb->region);
4083
4084                         S390_LONG (code, lg, lg, s390_r14, 0,
4085                                    spvar->inst_basereg,
4086                                    spvar->inst_offset);
4087                         s390_br  (code, s390_r14);
4088                 }
4089                         break;
4090                 case OP_CALL_HANDLER: {
4091                         mono_add_patch_info (cfg, code-cfg->native_code,
4092                                              MONO_PATCH_INFO_BB, ins->inst_target_bb);
4093                         s390_brasl (code, s390_r14, 0);
4094                         mono_cfg_add_try_hole (cfg, ins->inst_eh_block, code, bb);
4095                 }
4096                         break;
4097                 case OP_LABEL: {
4098                         ins->inst_c0 = code - cfg->native_code;
4099                 }
4100                         break;
4101                 case OP_RELAXED_NOP:
4102                 case OP_NOP:
4103                 case OP_DUMMY_USE:
4104                 case OP_DUMMY_STORE:
4105                 case OP_NOT_REACHED:
4106                 case OP_NOT_NULL: {
4107                 }
4108                         break;
4109                 case OP_IL_SEQ_POINT:
4110                         mono_add_seq_point (cfg, bb, ins, code - cfg->native_code);
4111                         break;
4112                 case OP_SEQ_POINT: {
4113                         int i;
4114
4115                         if (cfg->compile_aot)
4116                                 NOT_IMPLEMENTED;
4117
4118                         /*
4119                          * Read from the single stepping trigger page. This will cause a
4120                          * SIGSEGV when single stepping is enabled.
4121                          * We do this _before_ the breakpoint, so single stepping after
4122                          * a breakpoint is hit will step to the next IL offset.
4123                          */
4124                         if (ins->flags & MONO_INST_SINGLE_STEP_LOC) {
4125                                 breakpointCode.pTrigger = ss_trigger_page;
4126                                 memcpy(code, (void *) &breakpointCode, BREAKPOINT_SIZE);
4127                                 code += BREAKPOINT_SIZE;
4128                         }
4129
4130                         mono_add_seq_point (cfg, bb, ins, code - cfg->native_code);
4131
4132                         /*
4133                          * A placeholder for a possible breakpoint inserted by
4134                          * mono_arch_set_breakpoint ().
4135                          */
4136                         for (i = 0; i < (BREAKPOINT_SIZE / S390X_NOP_SIZE); ++i)
4137                                 s390_nop (code);
4138
4139                         /*
4140                          * Add an additional nop so skipping the bp doesn't cause the ip to point
4141                          * to another IL offset.
4142                          */
4143                         s390_nop (code);
4144
4145                         break;
4146                 }
4147                 case OP_GENERIC_CLASS_INIT: {
4148                         static int byte_offset = -1;
4149                         static guint8 bitmask;
4150                         short int *jump;
4151
4152                         g_assert (ins->sreg1 == S390_FIRST_ARG_REG);
4153
4154                         if (byte_offset < 0)
4155                                 mono_marshal_find_bitfield_offset (MonoVTable, initialized, &byte_offset, &bitmask);
4156
4157                         s390_tm (code, ins->sreg1, byte_offset, bitmask);
4158                         s390_jo (code, 0); CODEPTR(code, jump);
4159
4160                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_JIT_ICALL_ADDR,
4161                                                 "specific_trampoline_generic_class_init");
4162                         S390_CALL_TEMPLATE(code, s390_r14);
4163
4164                         PTRSLOT (code, jump);
4165
4166                         ins->flags |= MONO_INST_GC_CALLSITE;
4167                         ins->backend.pc_offset = code - cfg->native_code;
4168                         break;
4169                 }
4170                 case OP_BR:
4171                         EMIT_UNCOND_BRANCH(ins);
4172                         break;
4173                 case OP_BR_REG: {
4174                         s390_br  (code, ins->sreg1);
4175                 }
4176                         break;
4177                 case OP_CEQ:
4178                 case OP_ICEQ:
4179                 case OP_LCEQ: {
4180                         s390_lghi(code, ins->dreg, 1);
4181                         s390_jz  (code, 4);
4182                         s390_lghi(code, ins->dreg, 0);
4183                 }
4184                         break;
4185                 case OP_CLT:
4186                 case OP_ICLT:
4187                 case OP_LCLT: {
4188                         s390_lghi(code, ins->dreg, 1);
4189                         s390_jl  (code, 4);
4190                         s390_lghi(code, ins->dreg, 0);
4191                 }
4192                         break;
4193                 case OP_CLT_UN:
4194                 case OP_ICLT_UN:
4195                 case OP_LCLT_UN: {
4196                         s390_lghi(code, ins->dreg, 1);
4197                         s390_jlo (code, 4);
4198                         s390_lghi(code, ins->dreg, 0);
4199                 }
4200                         break;
4201                 case OP_CGT:
4202                 case OP_ICGT:
4203                 case OP_LCGT: {
4204                         s390_lghi(code, ins->dreg, 1);
4205                         s390_jh  (code, 4);
4206                         s390_lghi(code, ins->dreg, 0);
4207                 }
4208                         break;
4209                 case OP_CGT_UN:
4210                 case OP_ICGT_UN:
4211                 case OP_LCGT_UN: {
4212                         s390_lghi(code, ins->dreg, 1);
4213                         s390_jho (code, 4);
4214                         s390_lghi(code, ins->dreg, 0);
4215                 }
4216                         break;
4217                 case OP_COND_EXC_EQ:
4218                 case OP_COND_EXC_IEQ:
4219                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_EQ, ins->inst_p1);
4220                         break;
4221                 case OP_COND_EXC_NE_UN:
4222                 case OP_COND_EXC_INE_UN:
4223                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NE, ins->inst_p1);
4224                         break;
4225                 case OP_COND_EXC_LT:
4226                 case OP_COND_EXC_ILT:
4227                 case OP_COND_EXC_LT_UN:
4228                 case OP_COND_EXC_ILT_UN:
4229                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, ins->inst_p1);
4230                         break;
4231                 case OP_COND_EXC_GT:
4232                 case OP_COND_EXC_IGT:
4233                 case OP_COND_EXC_GT_UN:
4234                 case OP_COND_EXC_IGT_UN:
4235                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GT, ins->inst_p1);
4236                         break;
4237                 case OP_COND_EXC_GE:
4238                 case OP_COND_EXC_IGE:
4239                 case OP_COND_EXC_GE_UN:
4240                 case OP_COND_EXC_IGE_UN:
4241                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GE, ins->inst_p1);
4242                         break;
4243                 case OP_COND_EXC_LE:
4244                 case OP_COND_EXC_ILE:
4245                 case OP_COND_EXC_LE_UN:
4246                 case OP_COND_EXC_ILE_UN:
4247                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LE, ins->inst_p1);
4248                         break;
4249                 case OP_COND_EXC_OV:
4250                 case OP_COND_EXC_IOV:
4251                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, ins->inst_p1);
4252                         break;
4253                 case OP_COND_EXC_NO:
4254                 case OP_COND_EXC_INO:
4255                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NO, ins->inst_p1);
4256                         break;
4257                 case OP_COND_EXC_C:
4258                 case OP_COND_EXC_IC:
4259                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, ins->inst_p1);
4260                         break;
4261                 case OP_COND_EXC_NC:
4262                 case OP_COND_EXC_INC:
4263                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, ins->inst_p1);
4264                         break;
4265                 case OP_LBEQ:
4266                 case OP_IBEQ:
4267                         EMIT_COND_BRANCH (ins, S390_CC_EQ);
4268                         break;
4269                 case OP_LBNE_UN:
4270                 case OP_IBNE_UN:
4271                         EMIT_COND_BRANCH (ins, S390_CC_NE);
4272                         break;
4273                 case OP_LBLT:
4274                 case OP_LBLT_UN:
4275                 case OP_IBLT:
4276                 case OP_IBLT_UN:
4277                         EMIT_COND_BRANCH (ins, S390_CC_LT);
4278                         break;
4279                 case OP_LBGT:
4280                 case OP_LBGT_UN:
4281                 case OP_IBGT:
4282                 case OP_IBGT_UN:
4283                         EMIT_COND_BRANCH (ins, S390_CC_GT);
4284                         break;
4285                 case OP_LBGE:
4286                 case OP_LBGE_UN:
4287                 case OP_IBGE:
4288                 case OP_IBGE_UN:
4289                         EMIT_COND_BRANCH (ins, S390_CC_GE);
4290                         break;
4291                 case OP_LBLE:
4292                 case OP_LBLE_UN:
4293                 case OP_IBLE:
4294                 case OP_IBLE_UN:
4295                         EMIT_COND_BRANCH (ins, S390_CC_LE);
4296                         break;
4297
4298                 /* floating point opcodes */
4299                 case OP_R8CONST: {
4300                         if (*((double *) ins->inst_p0) == 0) {
4301                                 s390_lzdr (code, ins->dreg);
4302                         } else {
4303                                 S390_SET  (code, s390_r13, ins->inst_p0);
4304                                 s390_ld   (code, ins->dreg, 0, s390_r13, 0);
4305                         }
4306                 }
4307                         break;
4308                 case OP_R4CONST: {
4309                         if (*((float *) ins->inst_p0) == 0) {
4310                                 s390_lzdr (code, ins->dreg);
4311                         } else {
4312                                 S390_SET  (code, s390_r13, ins->inst_p0);
4313                                 s390_ldeb (code, ins->dreg, 0, s390_r13, 0);
4314                         }
4315                 }
4316                         break;
4317                 case OP_STORER8_MEMBASE_REG: {
4318                         S390_LONG (code, stdy, std, ins->sreg1, 0,
4319                                    ins->inst_destbasereg, ins->inst_offset);
4320                 }
4321                         break;
4322                 case OP_LOADR8_MEMBASE: {
4323                         S390_LONG (code, ldy, ld, ins->dreg, 0,
4324                                    ins->inst_basereg, ins->inst_offset);
4325                 }
4326                         break;
4327                 case OP_STORER4_MEMBASE_REG: {
4328                         s390_ledbr (code, s390_f15, ins->sreg1);
4329                         S390_LONG (code, stey, ste, s390_f15, 0,
4330                                    ins->inst_destbasereg, ins->inst_offset);
4331                 }
4332                         break;
4333                 case OP_LOADR4_MEMBASE: {
4334                         S390_LONG (code, ldy, ld, s390_f15, 0,
4335                                    ins->inst_basereg, ins->inst_offset);
4336                         s390_ldebr (code, ins->dreg, s390_f15);
4337                 }
4338                         break;
4339                 case OP_ICONV_TO_R_UN: {
4340                         if (facs.fpe) {
4341                                 s390_cdlfbr (code, ins->dreg, 5, ins->sreg1, 0);
4342                         } else {
4343                                 s390_llgfr (code, s390_r0, ins->sreg1);
4344                                 s390_cdgbr (code, ins->dreg, s390_r0);
4345                         }
4346                 }
4347                         break;
4348                 case OP_LCONV_TO_R_UN: {
4349                         if (facs.fpe) {
4350                                 s390_cdlgbr (code, ins->dreg, 5, ins->sreg1, 0);
4351                         } else {
4352                                 short int *jump;
4353                                 s390_cxgbr (code, s390_f12, ins->sreg1);
4354                                 s390_ltgr  (code, ins->sreg1, ins->sreg1);
4355                                 s390_jnl   (code, 0); CODEPTR(code, jump);
4356                                 S390_SET   (code, s390_r13, 0x403f000000000000llu);
4357                                 s390_lgdr  (code, s390_f13, s390_r13);
4358                                 s390_lzdr  (code, s390_f15);
4359                                 s390_axbr  (code, s390_f12, s390_f13);
4360                                 PTRSLOT(code, jump);
4361                                 s390_ldxbr (code, s390_f13, s390_f12);
4362                                 s390_ldr   (code, ins->dreg, s390_f13);
4363                         }
4364                 }
4365                         break;
4366                 case OP_LCONV_TO_R4:
4367                 case OP_ICONV_TO_R4: {
4368                         s390_cegbr (code, ins->dreg, ins->sreg1);
4369                         s390_ldebr (code, ins->dreg, ins->dreg);
4370                 }
4371                         break;
4372                 case OP_LCONV_TO_R8:
4373                 case OP_ICONV_TO_R8: {
4374                         s390_cdgbr (code, ins->dreg, ins->sreg1);
4375                 }
4376                         break;
4377                 case OP_FCONV_TO_I1:
4378                         s390_cgdbr (code, ins->dreg, 5, ins->sreg1);
4379                         s390_ltgr  (code, ins->dreg, ins->dreg);
4380                         s390_jnl   (code, 4);
4381                         s390_oill  (code, ins->dreg, 0x80);
4382                         s390_lghi  (code, s390_r0, 0xff);
4383                         s390_ngr   (code, ins->dreg, s390_r0);
4384                         break;
4385                 case OP_FCONV_TO_U1:
4386                         if (facs.fpe) {
4387                                 s390_clgdbr (code, ins->dreg, 5, ins->sreg1, 0);
4388                                 s390_lghi  (code, s390_r0, 0xff);
4389                                 s390_ngr   (code, ins->dreg, s390_r0);
4390                         } else {
4391                                 code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 1, FALSE);
4392                         }
4393                         break;
4394                 case OP_FCONV_TO_I2:
4395                         s390_cgdbr (code, ins->dreg, 5, ins->sreg1);
4396                         s390_ltgr  (code, ins->dreg, ins->dreg);
4397                         s390_jnl   (code, 4);
4398                         s390_oill  (code, ins->dreg, 0x8000);
4399                         s390_llill (code, s390_r0, 0xffff);
4400                         s390_ngr   (code, ins->dreg, s390_r0);
4401                         break;
4402                 case OP_FCONV_TO_U2:
4403                         if (facs.fpe) {
4404                                 s390_clgdbr (code, ins->dreg, 5, ins->sreg1, 0);
4405                                 s390_llill  (code, s390_r0, 0xffff);
4406                                 s390_ngr    (code, ins->dreg, s390_r0);
4407                         } else {
4408                                 code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 2, FALSE);
4409                         }
4410                         break;
4411                 case OP_FCONV_TO_I4:
4412                 case OP_FCONV_TO_I:
4413                         s390_cfdbr (code, ins->dreg, 5, ins->sreg1);
4414                         break;
4415                 case OP_FCONV_TO_U4:
4416                 case OP_FCONV_TO_U:
4417                         if (facs.fpe) {
4418                                 s390_clfdbr (code, ins->dreg, 5, ins->sreg1, 0);
4419                         } else {
4420                                 code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 4, FALSE);
4421                         }
4422                         break;
4423                 case OP_FCONV_TO_I8:
4424                         s390_cgdbr (code, ins->dreg, 5, ins->sreg1);
4425                         break;
4426                 case OP_FCONV_TO_U8:
4427                         if (facs.fpe) {
4428                                 s390_clgdbr (code, ins->dreg, 5, ins->sreg1, 0);
4429                         } else {
4430                                 code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 8, FALSE);
4431                         }
4432                         break;
4433                 case OP_LCONV_TO_OVF_I: {
4434                         /* Valid ints: 0xffffffff:8000000 to 00000000:0x7f000000 */
4435                         short int *o[5];
4436                         s390_ltgr (code, ins->sreg2, ins->sreg2);
4437                         s390_jnl  (code, 0); CODEPTR(code, o[0]);
4438                         s390_ltgr (code, ins->sreg1, ins->sreg1);
4439                         s390_jnl  (code, 0); CODEPTR(code, o[1]);
4440                         s390_lhi  (code, s390_r13, -1);
4441                         s390_cgr  (code, ins->sreg1, s390_r13);
4442                         s390_jnz  (code, 0); CODEPTR(code, o[2]);
4443                         if (ins->dreg != ins->sreg2)
4444                                 s390_lgr  (code, ins->dreg, ins->sreg2);
4445                         s390_j    (code, 0); CODEPTR(code, o[3]);
4446                         PTRSLOT(code, o[0]);
4447                         s390_jz   (code, 0); CODEPTR(code, o[4]);
4448                         PTRSLOT(code, o[1]);
4449                         PTRSLOT(code, o[2]);
4450                         mono_add_patch_info (cfg, code - cfg->native_code,
4451                                              MONO_PATCH_INFO_EXC, "OverflowException");
4452                         s390_brasl (code, s390_r14, 0);
4453                         PTRSLOT(code, o[3]);
4454                         PTRSLOT(code, o[4]);
4455                 }
4456                         break;
4457                 case OP_ABS: {
4458                         s390_lpdbr (code, ins->dreg, ins->sreg1);
4459                 }
4460                         break;
4461                 case OP_SQRT: {
4462                         s390_sqdbr (code, ins->dreg, ins->sreg1);
4463                 }
4464                         break;
4465                 case OP_FADD: {
4466                         CHECK_SRCDST_COM_F;
4467                         s390_adbr (code, ins->dreg, src2);
4468                 }
4469                         break;
4470                 case OP_FSUB: {
4471                         CHECK_SRCDST_NCOM_F;
4472                         s390_sdbr (code, ins->dreg, src2);
4473                 }
4474                         break;
4475                 case OP_FMUL: {
4476                         CHECK_SRCDST_COM_F;
4477                         s390_mdbr (code, ins->dreg, src2);
4478                 }
4479                         break;
4480                 case OP_FDIV: {
4481                         CHECK_SRCDST_NCOM_F;
4482                         s390_ddbr (code, ins->dreg, src2);
4483                 }
4484                         break;
4485                 case OP_FNEG: {
4486                         s390_lcdbr (code, ins->dreg, ins->sreg1);
4487                 }
4488                         break;
4489                 case OP_FREM: {
4490                         CHECK_SRCDST_NCOM_F;
4491                         s390_didbr (code, ins->dreg, src2, 5, s390_f15);
4492                 }
4493                         break;
4494                 case OP_FCOMPARE: {
4495                         s390_cdbr (code, ins->sreg1, ins->sreg2);
4496                 }
4497                         break;
4498                 case OP_FCEQ: {
4499                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4500                         s390_lghi  (code, ins->dreg, 1);
4501                         s390_je    (code, 4);
4502                         s390_lghi  (code, ins->dreg, 0);
4503                 }
4504                         break;
4505                 case OP_FCLT: {
4506                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4507                         s390_lghi  (code, ins->dreg, 1);
4508                         s390_jl    (code, 4);
4509                         s390_lghi  (code, ins->dreg, 0);
4510                 }
4511                         break;
4512                 case OP_FCLT_UN: {
4513                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4514                         s390_lghi  (code, ins->dreg, 1);
4515                         s390_jlo   (code, 4);
4516                         s390_lghi  (code, ins->dreg, 0);
4517                 }
4518                         break;
4519                 case OP_FCGT: {
4520                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4521                         s390_lghi  (code, ins->dreg, 1);
4522                         s390_jh    (code, 4);
4523                         s390_lghi  (code, ins->dreg, 0);
4524                 }
4525                         break;
4526                 case OP_FCGT_UN: {
4527                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4528                         s390_lghi  (code, ins->dreg, 1);
4529                         s390_jho   (code, 4);
4530                         s390_lghi  (code, ins->dreg, 0);
4531                 }
4532                         break;
4533                 case OP_FBEQ: {
4534                         short *o;
4535                         s390_jo (code, 0); CODEPTR(code, o);
4536                         EMIT_COND_BRANCH (ins, S390_CC_EQ);
4537                         PTRSLOT (code, o);
4538                 }
4539                         break;
4540                 case OP_FBNE_UN:
4541                         EMIT_COND_BRANCH (ins, S390_CC_NE|S390_CC_OV);
4542                         break;
4543                 case OP_FBLT: {
4544                         short *o;
4545                         s390_jo (code, 0); CODEPTR(code, o);
4546                         EMIT_COND_BRANCH (ins, S390_CC_LT);
4547                         PTRSLOT (code, o);
4548                 }
4549                         break;
4550                 case OP_FBLT_UN:
4551                         EMIT_COND_BRANCH (ins, S390_CC_LT|S390_CC_OV);
4552                         break;
4553                 case OP_FBGT: {
4554                         short *o;
4555                         s390_jo (code, 0); CODEPTR(code, o);
4556                         EMIT_COND_BRANCH (ins, S390_CC_GT);
4557                         PTRSLOT (code, o);
4558                 }
4559                         break;
4560                 case OP_FBGT_UN:
4561                         EMIT_COND_BRANCH (ins, S390_CC_GT|S390_CC_OV);
4562                         break;
4563                 case OP_FBGE: {
4564                         short *o;
4565                         s390_jo (code, 0); CODEPTR(code, o);
4566                         EMIT_COND_BRANCH (ins, S390_CC_GE);
4567                         PTRSLOT (code, o);
4568                 }
4569                         break;
4570                 case OP_FBGE_UN:
4571                         EMIT_COND_BRANCH (ins, S390_CC_GE|S390_CC_OV);
4572                         break;
4573                 case OP_FBLE: {
4574                         short *o;
4575                         s390_jo (code, 0); CODEPTR(code, o);
4576                         EMIT_COND_BRANCH (ins, S390_CC_LE);
4577                         PTRSLOT (code, o);
4578                 }
4579                         break;
4580                 case OP_FBLE_UN:
4581                         EMIT_COND_BRANCH (ins, S390_CC_LE|S390_CC_OV);
4582                         break;
4583                 case OP_CKFINITE: {
4584                         short *o;
4585                         s390_lhi  (code, s390_r13, 0x7f);
4586                         s390_tcdb (code, ins->sreg1, 0, s390_r13, 0);
4587                         s390_jz   (code, 0); CODEPTR(code, o);
4588                         mono_add_patch_info (cfg, code - cfg->native_code,
4589                                              MONO_PATCH_INFO_EXC, "ArithmeticException");
4590                         s390_brasl (code, s390_r14,0);
4591                         PTRSLOT(code, o);
4592                 }
4593                         break;
4594                 case OP_S390_MOVE: {
4595                         if (ins->backend.size > 0) {
4596                                 if (ins->backend.size <= 256) {
4597                                         s390_mvc  (code, ins->backend.size, ins->dreg,
4598                                                    ins->inst_offset, ins->sreg1, ins->inst_imm);
4599                                 } else {
4600                                         s390_lgr  (code, s390_r0, ins->dreg);
4601                                         if (ins->inst_offset > 0) {
4602                                                 if (s390_is_imm16 (ins->inst_offset)) {
4603                                                         s390_aghi (code, s390_r0, ins->inst_offset);
4604                                                 } else if (s390_is_imm32 (ins->inst_offset)) {
4605                                                         s390_agfi (code, s390_r0, ins->inst_offset);
4606                                                 } else {
4607                                                         S390_SET  (code, s390_r13, ins->inst_offset);
4608                                                         s390_agr  (code, s390_r0, s390_r13);
4609                                                 }
4610                                         }
4611                                         s390_lgr  (code, s390_r12, ins->sreg1);
4612                                         if (ins->inst_imm > 0) {
4613                                                 if (s390_is_imm16 (ins->inst_imm)) {
4614                                                         s390_aghi (code, s390_r12, ins->inst_imm);
4615                                                 } else if (s390_is_imm32 (ins->inst_imm)) {
4616                                                         s390_agfi (code, s390_r12, ins->inst_imm);
4617                                                 } else {
4618                                                         S390_SET  (code, s390_r13, ins->inst_imm);
4619                                                         s390_agr  (code, s390_r12, s390_r13);
4620                                                 }
4621                                         }
4622                                         if (s390_is_imm16 (ins->backend.size)) {
4623                                                 s390_lghi (code, s390_r1, ins->backend.size);
4624                                         } else if (s390_is_imm32 (ins->inst_offset)) {
4625                                                 s390_agfi (code, s390_r1, ins->backend.size);
4626                                         } else {
4627                                                 S390_SET  (code, s390_r13, ins->backend.size);
4628                                                 s390_agr  (code, s390_r1, s390_r13);
4629                                         }
4630                                         s390_lgr  (code, s390_r13, s390_r1);
4631                                         s390_mvcle(code, s390_r0, s390_r12, 0, 0);
4632                                         s390_jo   (code, -2);
4633                                 }
4634                         }
4635                 }
4636                         break;
4637                 case OP_ATOMIC_ADD_I8: {
4638                         s390_lgr (code, s390_r1, ins->sreg2);
4639                         s390_lg  (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4640                         s390_agr (code, s390_r1, s390_r0);
4641                         s390_csg (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
4642                         s390_jnz (code, -10);
4643                         s390_lgr (code, ins->dreg, s390_r1);
4644                 }
4645                         break;
4646                 case OP_ATOMIC_EXCHANGE_I8: {
4647                         s390_lg  (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4648                         s390_csg (code, s390_r0, ins->sreg2, ins->inst_basereg, ins->inst_offset);
4649                         s390_jnz (code, -6);
4650                         s390_lgr (code, ins->dreg, s390_r0);
4651                 }
4652                         break;
4653                 case OP_ATOMIC_ADD_I4: {
4654                         s390_lgfr(code, s390_r1, ins->sreg2);
4655                         s390_lgf (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4656                         s390_agr (code, s390_r1, s390_r0);
4657                         s390_cs  (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
4658                         s390_jnz (code, -9);
4659                         s390_lgfr(code, ins->dreg, s390_r1);
4660                 }
4661                         break;
4662                 case OP_ATOMIC_EXCHANGE_I4: {
4663                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4664                         s390_cs  (code, s390_r0, ins->sreg2, ins->inst_basereg, ins->inst_offset);
4665                         s390_jnz (code, -4);
4666                         s390_lgfr(code, ins->dreg, s390_r0);
4667                 }
4668                         break;
4669                 case OP_S390_BKCHAIN: {
4670                         s390_lgr  (code, ins->dreg, ins->sreg1);
4671                         if (s390_is_imm16 (cfg->stack_offset)) {
4672                                 s390_aghi (code, ins->dreg, cfg->stack_offset);
4673                         } else if (s390_is_imm32 (cfg->stack_offset)) {
4674                                 s390_agfi (code, ins->dreg, cfg->stack_offset);
4675                         } else {
4676                                 S390_SET  (code, s390_r13, cfg->stack_offset);
4677                                 s390_agr  (code, ins->dreg, s390_r13);
4678                         }
4679                 }
4680                         break;
4681                 case OP_MEMORY_BARRIER:
4682                         s390_mem (code);
4683                         break;
4684 #if USE_COOP_GC
4685                 case OP_GC_SAFE_POINT: {
4686                         guint8 *br;
4687
4688                         s390_chi (code, ins->sreg1, 1);
4689                         s390_je  (code, 0); CODEPTR(code, br);
4690                         mono_add_patch_info (cfg, code- cfg->native_code, MONO_PATCH_INFO_ABS,
4691                                              mono_threads_state_poll);
4692                         S390_CALL_TEMPLATE (code, s390_r14);
4693                         PTRSLOT (code, br);
4694                         break;
4695                 }
4696 #endif
4697                 case OP_GC_LIVENESS_DEF:
4698                 case OP_GC_LIVENESS_USE:
4699                 case OP_GC_PARAM_SLOT_LIVENESS_DEF:
4700                         ins->backend.pc_offset = code - cfg->native_code;
4701                         break;
4702                 case OP_GC_SPILL_SLOT_LIVENESS_DEF:
4703                         ins->backend.pc_offset = code - cfg->native_code;
4704                         bb->spill_slot_defs = g_slist_prepend_mempool (cfg->mempool, bb->spill_slot_defs, ins);
4705                         break;
4706                 default:
4707                         g_warning ("unknown opcode %s in %s()\n", mono_inst_name (ins->opcode), __FUNCTION__);
4708                         g_assert_not_reached ();
4709                 }
4710
4711                 if ((cfg->opt & MONO_OPT_BRANCH) && ((code - cfg->native_code - offset) > max_len)) {
4712                         g_warning ("wrong maximal instruction length of instruction %s (expected %d, got %ld)",
4713                                    mono_inst_name (ins->opcode), max_len, code - cfg->native_code - offset);
4714                         g_assert_not_reached ();
4715                 }
4716
4717                 last_offset = offset;
4718         }
4719
4720         cfg->code_len = code - cfg->native_code;
4721 }
4722
4723 /*========================= End of Function ========================*/
4724
4725 /*------------------------------------------------------------------*/
4726 /*                                                                  */
4727 /* Name         - mono_arch_register_lowlevel_calls                 */
4728 /*                                                                  */
4729 /* Function     - Register routines to help with --trace operation. */
4730 /*                                                                  */
4731 /*------------------------------------------------------------------*/
4732
4733 void
4734 mono_arch_register_lowlevel_calls (void)
4735 {
4736 }
4737
4738 /*========================= End of Function ========================*/
4739
4740 /*------------------------------------------------------------------*/
4741 /*                                                                  */
4742 /* Name         - mono_arch_patch_code                              */
4743 /*                                                                  */
4744 /* Function     - Process the patch data created during the         */
4745 /*                instruction build process. This resolves jumps,   */
4746 /*                calls, variables etc.                             */
4747 /*                                                                  */
4748 /*------------------------------------------------------------------*/
4749
4750 void
4751 mono_arch_patch_code (MonoCompile *cfg, MonoMethod *method, MonoDomain *domain,
4752                       guint8 *code, MonoJumpInfo *ji, gboolean run_cctors)
4753 {
4754         MonoJumpInfo *patch_info;
4755
4756         for (patch_info = ji; patch_info; patch_info = patch_info->next) {
4757                 unsigned char *ip = patch_info->ip.i + code;
4758                 gconstpointer target = NULL;
4759
4760                 target = mono_resolve_patch_target (method, domain, code,
4761                                                     patch_info, run_cctors);
4762
4763                 switch (patch_info->type) {
4764                         case MONO_PATCH_INFO_IP:
4765                         case MONO_PATCH_INFO_LDSTR:
4766                         case MONO_PATCH_INFO_TYPE_FROM_HANDLE:
4767                         case MONO_PATCH_INFO_LDTOKEN:
4768                         case MONO_PATCH_INFO_EXC:
4769                                 s390_patch_addr (ip, (guint64) target);
4770                                 continue;
4771                         case MONO_PATCH_INFO_METHOD:
4772                         case MONO_PATCH_INFO_INTERNAL_METHOD:
4773                         case MONO_PATCH_INFO_JIT_ICALL_ADDR:
4774                         case MONO_PATCH_INFO_CLASS_INIT:
4775                         case MONO_PATCH_INFO_RGCTX_FETCH:
4776                         case MONO_PATCH_INFO_MONITOR_ENTER:
4777                         case MONO_PATCH_INFO_MONITOR_ENTER_V4:
4778                         case MONO_PATCH_INFO_MONITOR_EXIT:
4779                         case MONO_PATCH_INFO_ABS: {
4780                                 S390_EMIT_CALL (ip, target);
4781                                 continue;
4782                         }
4783                         case MONO_PATCH_INFO_SWITCH:
4784                                 /*----------------------------------*/
4785                                 /* ip points at the basr r13,0/j +4 */
4786                                 /* instruction the vtable value     */
4787                                 /* follows this (i.e. ip+6)         */
4788                                 /*----------------------------------*/
4789                                 S390_EMIT_LOAD (ip, target);
4790                                 continue;
4791                         case MONO_PATCH_INFO_METHODCONST:
4792                         case MONO_PATCH_INFO_CLASS:
4793                         case MONO_PATCH_INFO_IMAGE:
4794                         case MONO_PATCH_INFO_FIELD:
4795                         case MONO_PATCH_INFO_IID:
4796                         case MONO_PATCH_INFO_EXC_NAME:
4797                                 target = S390_RELATIVE(target, ip);
4798                                 s390_patch_rel (ip, (guint64) target);
4799                                 continue;
4800                         case MONO_PATCH_INFO_R4:
4801                         case MONO_PATCH_INFO_R8:
4802                         case MONO_PATCH_INFO_METHOD_REL:
4803                                 g_assert_not_reached ();
4804                                 continue;
4805                         default:
4806                                 target = S390_RELATIVE(target, ip);
4807                                 ip += 2;
4808                                 s390_patch_rel (ip, (guint64) target);
4809                 }
4810         }
4811 }
4812
4813 /*========================= End of Function ========================*/
4814
4815 /*------------------------------------------------------------------*/
4816 /*                                                                  */
4817 /* Name         - emit_load_volatile_arguments                      */
4818 /*                                                                  */
4819 /* Function     - Emit the instructions to reload parameter regist- */
4820 /*                registers for use with "tail" operations.         */
4821 /*                                                                  */
4822 /*                The register loading operations performed here    */
4823 /*                are the mirror of the store operations performed  */
4824 /*                in mono_arch_emit_prolog and need to be kept in   */
4825 /*                synchronization with it.                          */
4826 /*                                                                  */
4827 /*------------------------------------------------------------------*/
4828
4829 guint8 *
4830 emit_load_volatile_arguments (guint8 *code, MonoCompile *cfg)
4831 {
4832         MonoInst *inst;
4833         MonoMethod *method = cfg->method;
4834         MonoMethodSignature *sig = mono_method_signature(method);
4835         int pos = 0, i;
4836         CallInfo *cinfo;
4837
4838         cinfo = get_call_info (NULL, NULL, sig);
4839
4840         if (cinfo->struct_ret) {
4841                 ArgInfo *ainfo = &cinfo->ret;
4842                 inst         = cfg->vret_addr;
4843                 s390_lg (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4844         }
4845
4846         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
4847                 ArgInfo *ainfo = cinfo->args + i;
4848                 inst = cfg->args [pos];
4849
4850                 if (inst->opcode == OP_REGVAR) {
4851                         if (ainfo->regtype == RegTypeGeneral)
4852                                 s390_lgr (code, ainfo->reg, inst->dreg);
4853                         else if (ainfo->regtype == RegTypeFP) {
4854                                 if (inst->dreg != ainfo->reg) {
4855                                         if (ainfo->size == 4) {
4856                                                 s390_ldebr (code, ainfo->reg, inst->dreg);
4857                                         } else {
4858                                                 s390_ldr   (code, ainfo->reg, inst->dreg);
4859                                         }
4860                                 }
4861                         }
4862                         else if (ainfo->regtype == RegTypeBase) {
4863                         } else
4864                                 g_assert_not_reached ();
4865                 } else {
4866                         if (ainfo->regtype == RegTypeGeneral) {
4867                                 if (!((ainfo->reg >= 2) && (ainfo->reg <= 6)))
4868                                         g_assert_not_reached();
4869                                 switch (ainfo->size) {
4870                                 case 1:
4871                                         s390_llgc (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4872                                         break;
4873                                 case 2:
4874                                         s390_lgh  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4875                                         break;
4876                                 case 4:
4877                                         s390_lgf (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4878                                         break;
4879                                 case 8:
4880                                         s390_lg  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4881                                         break;
4882                                 }
4883                         } else if (ainfo->regtype == RegTypeBase) {
4884                         } else if (ainfo->regtype == RegTypeFP) {
4885                                 if (ainfo->size == 8)
4886                                         s390_ld  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4887                                 else if (ainfo->size == 4)
4888                                         s390_le  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4889                                 else
4890                                         g_assert_not_reached ();
4891                         } else if (ainfo->regtype == RegTypeStructByVal) {
4892                                 if (ainfo->reg != STK_BASE) {
4893                                         switch (ainfo->size) {
4894                                         case 1:
4895                                                 s390_llgc (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4896                                                 break;
4897                                         case 2:
4898                                                 s390_lgh (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4899                                                 break;
4900                                         case 4:
4901                                                 s390_lgf (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4902                                                 break;
4903                                         case 8:
4904                                                 s390_lg  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4905                                                 break;
4906                                         }
4907                                 }
4908                         } else if (ainfo->regtype == RegTypeStructByAddr) {
4909                                 if (ainfo->reg != STK_BASE) {
4910                                         s390_lg (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4911                                 }
4912                         } else
4913                                 g_assert_not_reached ();
4914                 }
4915                 pos++;
4916         }
4917
4918         return code;
4919 }
4920
4921 /*========================= End of Function ========================*/
4922
4923 /*------------------------------------------------------------------*/
4924 /*                                                                  */
4925 /* Name         - mono_arch_emit_prolog                             */
4926 /*                                                                  */
4927 /* Function     - Create the instruction sequence for a function    */
4928 /*                prolog.                                           */
4929 /*                                                                  */
4930 /*------------------------------------------------------------------*/
4931
4932 guint8 *
4933 mono_arch_emit_prolog (MonoCompile *cfg)
4934 {
4935         MonoMethod *method = cfg->method;
4936         MonoBasicBlock *bb;
4937         MonoMethodSignature *sig;
4938         MonoInst *inst;
4939         long alloc_size, pos, max_offset, i, cfa_offset = 0;
4940         guint8 *code;
4941         guint32 size;
4942         CallInfo *cinfo;
4943         int tracing = 0;
4944         int lmfOffset;
4945
4946         cfg->code_size   = 512;
4947
4948         if (mono_jit_trace_calls != NULL && mono_trace_eval (method)) {
4949                 tracing         = 1;
4950                 cfg->code_size += 256;
4951         } else if (cfg->prof_options & MONO_PROFILE_ENTER_LEAVE)
4952                 cfg->code_size += 256;
4953
4954         if (method->save_lmf)
4955                 cfg->code_size += 200;
4956
4957         cfg->native_code = code = g_malloc (cfg->code_size);
4958
4959         mono_emit_unwind_op_def_cfa (cfg, code, STK_BASE, 0);
4960         emit_unwind_regs(cfg, code, s390_r6, s390_r14, S390_REG_SAVE_OFFSET);
4961         s390_stmg (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
4962         mono_emit_unwind_op_offset (cfg, code, s390_r14, S390_RET_ADDR_OFFSET);
4963
4964         if (cfg->arch.bkchain_reg != -1)
4965                 s390_lgr (code, cfg->arch.bkchain_reg, STK_BASE);
4966
4967         if (cfg->flags & MONO_CFG_HAS_ALLOCA) {
4968                 cfg->used_int_regs |= 1 << 11;
4969         }
4970
4971         alloc_size = cfg->stack_offset;
4972
4973         cfg->stack_usage = cfa_offset = alloc_size;
4974         mono_emit_unwind_op_def_cfa_offset (cfg, code, alloc_size);
4975         s390_lgr  (code, s390_r11, STK_BASE);
4976         if (s390_is_imm16 (alloc_size)) {
4977                 s390_aghi (code, STK_BASE, -alloc_size);
4978         } else if (s390_is_imm32 (alloc_size)) {
4979                 s390_agfi (code, STK_BASE, -alloc_size);
4980         } else {
4981                 int stackSize = alloc_size;
4982                 while (stackSize > INT_MAX) {
4983                         s390_agfi (code, STK_BASE, -INT_MAX);
4984                         stackSize -= INT_MAX;
4985                 }
4986                 s390_agfi (code, STK_BASE, -stackSize);
4987         }
4988         s390_stg  (code, s390_r11, 0, STK_BASE, 0);
4989
4990         if (cfg->frame_reg != STK_BASE)
4991                 s390_lgr (code, s390_r11, STK_BASE);
4992
4993         mono_emit_unwind_op_def_cfa_reg (cfg, code, cfg->frame_reg);
4994
4995         /* store runtime generic context */
4996         if (cfg->rgctx_var) {
4997                 g_assert (cfg->rgctx_var->opcode == OP_REGOFFSET);
4998
4999                 s390_stg  (code, MONO_ARCH_RGCTX_REG, 0,
5000                            cfg->rgctx_var->inst_basereg,
5001                            cfg->rgctx_var->inst_offset);
5002         }
5003
5004         /* compute max_offset in order to use short forward jumps
5005          * we always do it on s390 because the immediate displacement
5006          * for jumps is too small
5007          */
5008         max_offset = 0;
5009         for (bb = cfg->bb_entry; bb; bb = bb->next_bb) {
5010                 MonoInst *ins;
5011                 bb->max_offset = max_offset;
5012
5013                 if (cfg->prof_options & MONO_PROFILE_COVERAGE)
5014                         max_offset += 6;
5015
5016                 MONO_BB_FOR_EACH_INS (bb, ins)
5017                         max_offset += ((guint8 *)ins_get_spec (ins->opcode))[MONO_INST_LEN];
5018         }
5019
5020         /* load arguments allocated to register from the stack */
5021         sig = mono_method_signature (method);
5022         pos = 0;
5023
5024         cinfo = get_call_info (cfg, cfg->mempool, sig);
5025
5026         if (cinfo->struct_ret) {
5027                 ArgInfo *ainfo     = &cinfo->ret;
5028                 inst               = cfg->vret_addr;
5029                 inst->backend.size = ainfo->vtsize;
5030                 s390_stg (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
5031         }
5032
5033         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
5034                 ArgInfo *ainfo = cinfo->args + i;
5035                 inst = cfg->args [pos];
5036
5037                 if (inst->opcode == OP_VTARG_ADDR)
5038                         inst = inst->inst_left;
5039
5040                 if (inst->opcode == OP_REGVAR) {
5041                         if (ainfo->regtype == RegTypeGeneral)
5042                                 s390_lgr (code, inst->dreg, ainfo->reg);
5043                         else if (ainfo->regtype == RegTypeFP) {
5044                                 if (inst->dreg != ainfo->reg) {
5045                                         if (ainfo->size == 4) {
5046                                                 s390_ledbr (code, inst->dreg, ainfo->reg);
5047                                         } else {
5048                                                 s390_ldr   (code, inst->dreg, ainfo->reg);
5049                                         }
5050                                 }
5051                         }
5052                         else if (ainfo->regtype == RegTypeBase) {
5053                                 s390_lgr  (code, s390_r13, STK_BASE);
5054                                 s390_aghi (code, s390_r13, alloc_size);
5055                                 s390_lg   (code, inst->dreg, 0, s390_r13, ainfo->offset);
5056                         } else
5057                                 g_assert_not_reached ();
5058
5059                         if (cfg->verbose_level > 2)
5060                                 g_print ("Argument %d assigned to register %s\n",
5061                                          pos, mono_arch_regname (inst->dreg));
5062                 } else {
5063                         if (ainfo->regtype == RegTypeGeneral) {
5064                                 if (!((ainfo->reg >= 2) && (ainfo->reg <= 6)))
5065                                         g_assert_not_reached();
5066                                 switch (ainfo->size) {
5067                                 case 1:
5068                                         s390_stc (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
5069                                         break;
5070                                 case 2:
5071                                         s390_sth (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
5072                                         break;
5073                                 case 4:
5074                                         s390_st (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
5075                                         break;
5076                                 case 8:
5077                                         s390_stg (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
5078                                         break;
5079                                 }
5080                         } else if (ainfo->regtype == RegTypeBase) {
5081                         } else if (ainfo->regtype == RegTypeFP) {
5082                                 if (ainfo->size == 8)
5083                                         s390_std (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
5084                                 else if (ainfo->size == 4)
5085                                         s390_ste (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
5086                                 else
5087                                         g_assert_not_reached ();
5088                         } else if (ainfo->regtype == RegTypeStructByVal) {
5089                                 int doffset = inst->inst_offset;
5090                                 int reg;
5091                                 if (ainfo->reg != STK_BASE)
5092                                         reg = ainfo->reg;
5093                                 else {
5094                                         reg = s390_r0;
5095                                         s390_lgr  (code, s390_r13, STK_BASE);
5096                                         s390_aghi (code, s390_r13, alloc_size);
5097                                 }
5098
5099                                 size = (method->wrapper_type == MONO_WRAPPER_MANAGED_TO_NATIVE
5100                                         ? mono_class_native_size(mono_class_from_mono_type(inst->inst_vtype), NULL)
5101                                         : ainfo->size);
5102
5103                                 switch (size) {
5104                                         case 1:
5105                                                 if (ainfo->reg == STK_BASE)
5106                                                         s390_ic (code, reg, 0, s390_r13, ainfo->offset+7);
5107                                                 s390_stc (code, reg, 0, inst->inst_basereg, doffset);
5108                                                 break;
5109                                         case 2:
5110                                                 if (ainfo->reg == STK_BASE)
5111                                                         s390_lh (code, reg, 0, s390_r13, ainfo->offset+6);
5112                                                 s390_sth (code, reg, 0, inst->inst_basereg, doffset);
5113                                                 break;
5114                                         case 4:
5115                                                 if (ainfo->reg == STK_BASE)
5116                                                         s390_l  (code, reg, 0, s390_r13, ainfo->offset+4);
5117                                                 s390_st (code, reg, 0, inst->inst_basereg, doffset);
5118                                                 break;
5119                                         case 8:
5120                                                 if (ainfo->reg == STK_BASE)
5121                                                         s390_lg  (code, reg, 0, s390_r13, ainfo->offset);
5122                                                 s390_stg (code, reg, 0, inst->inst_basereg, doffset);
5123                                                 break;
5124                                 }
5125                         } else if (ainfo->regtype == RegTypeStructByAddr) {
5126                                 s390_stg (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
5127                         } else if (ainfo->regtype == RegTypeStructByAddrOnStack) {
5128                         } else
5129                                 g_assert_not_reached ();
5130                 }
5131                 pos++;
5132         }
5133
5134         if (method->save_lmf) {
5135                 /*---------------------------------------------------------------*/
5136                 /* build the MonoLMF structure on the stack - see mini-s390x.h   */
5137                 /*---------------------------------------------------------------*/
5138                 lmfOffset = alloc_size - sizeof(MonoLMF);
5139
5140                 s390_lgr   (code, s390_r13, cfg->frame_reg);
5141                 s390_aghi  (code, s390_r13, lmfOffset);
5142
5143                 /*---------------------------------------------------------------*/
5144                 /* Preserve the parameter registers while we fix up the lmf      */
5145                 /*---------------------------------------------------------------*/
5146                 s390_stmg  (code, s390_r2, s390_r6, s390_r13,
5147                             G_STRUCT_OFFSET(MonoLMF, pregs[0]));
5148
5149                 /*---------------------------------------------------------------*/
5150                 /* On return from this call r2 have the address of the &lmf      */
5151                 /*---------------------------------------------------------------*/
5152                 if (lmf_addr_tls_offset == -1) {
5153                         mono_add_patch_info (cfg, code - cfg->native_code,
5154                                              MONO_PATCH_INFO_INTERNAL_METHOD,
5155                                              (gpointer)"mono_get_lmf_addr");
5156                         S390_CALL_TEMPLATE(code, s390_r1);
5157                 } else {
5158                         /*-------------------------------------------------------*/
5159                         /* Get LMF by getting value from thread level storage    */
5160                         /*-------------------------------------------------------*/
5161                         s390_ear (code, s390_r1, 0);
5162                         s390_sllg(code, s390_r1, s390_r1, 0, 32);
5163                         s390_ear (code, s390_r1, 1);
5164                         s390_lg  (code, s390_r2, 0, s390_r1, lmf_addr_tls_offset);
5165                 }
5166
5167                 /*---------------------------------------------------------------*/
5168                 /* Set lmf.lmf_addr = jit_tls->lmf                               */
5169                 /*---------------------------------------------------------------*/
5170                 s390_stg   (code, s390_r2, 0, s390_r13,
5171                             G_STRUCT_OFFSET(MonoLMF, lmf_addr));
5172
5173                 /*---------------------------------------------------------------*/
5174                 /* Get current lmf                                               */
5175                 /*---------------------------------------------------------------*/
5176                 s390_lg    (code, s390_r0, 0, s390_r2, 0);
5177
5178                 /*---------------------------------------------------------------*/
5179                 /* Set our lmf as the current lmf                                */
5180                 /*---------------------------------------------------------------*/
5181                 s390_stg   (code, s390_r13, 0, s390_r2, 0);
5182
5183                 /*---------------------------------------------------------------*/
5184                 /* Have our lmf.previous_lmf point to the last lmf               */
5185                 /*---------------------------------------------------------------*/
5186                 s390_stg   (code, s390_r0, 0, s390_r13,
5187                             G_STRUCT_OFFSET(MonoLMF, previous_lmf));
5188
5189                 /*---------------------------------------------------------------*/
5190                 /* save method info                                              */
5191                 /*---------------------------------------------------------------*/
5192                 S390_SET   (code, s390_r1, method);
5193                 s390_stg   (code, s390_r1, 0, s390_r13,
5194                             G_STRUCT_OFFSET(MonoLMF, method));
5195
5196                 /*---------------------------------------------------------------*/
5197                 /* save the current IP                                           */
5198                 /*---------------------------------------------------------------*/
5199                 s390_stg   (code, STK_BASE, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, ebp));
5200                 s390_basr  (code, s390_r1, 0);
5201                 s390_stg   (code, s390_r1, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, eip));
5202
5203                 /*---------------------------------------------------------------*/
5204                 /* Save general and floating point registers                     */
5205                 /*---------------------------------------------------------------*/
5206                 s390_stmg  (code, s390_r2, s390_r12, s390_r13,
5207                             G_STRUCT_OFFSET(MonoLMF, gregs[2]));
5208                 for (i = 0; i < 16; i++) {
5209                         s390_std  (code, i, 0, s390_r13,
5210                                    G_STRUCT_OFFSET(MonoLMF, fregs[i]));
5211                 }
5212
5213                 /*---------------------------------------------------------------*/
5214                 /* Restore the parameter registers now that we've set up the lmf */
5215                 /*---------------------------------------------------------------*/
5216                 s390_lmg   (code, s390_r2, s390_r6, s390_r13,
5217                             G_STRUCT_OFFSET(MonoLMF, pregs[0]));
5218         }
5219
5220         if (tracing)
5221                 code = mono_arch_instrument_prolog(cfg, enter_method, code, TRUE);
5222
5223         cfg->code_len = code - cfg->native_code;
5224         g_assert (cfg->code_len < cfg->code_size);
5225
5226         return code;
5227 }
5228
5229 /*========================= End of Function ========================*/
5230
5231 /*------------------------------------------------------------------*/
5232 /*                                                                  */
5233 /* Name         - mono_arch_emit_epilog                             */
5234 /*                                                                  */
5235 /* Function     - Emit the instructions for a function epilog.      */
5236 /*                                                                  */
5237 /*------------------------------------------------------------------*/
5238
5239 void
5240 mono_arch_emit_epilog (MonoCompile *cfg)
5241 {
5242         MonoMethod *method = cfg->method;
5243         int tracing = 0;
5244         guint8 *code;
5245         int max_epilog_size = 96;
5246
5247         if (cfg->method->save_lmf)
5248                 max_epilog_size += 128;
5249
5250         if (mono_jit_trace_calls != NULL)
5251                 max_epilog_size += 128;
5252         else if (cfg->prof_options & MONO_PROFILE_ENTER_LEAVE)
5253                 max_epilog_size += 128;
5254
5255         while ((cfg->code_len + max_epilog_size) > (cfg->code_size - 16)) {
5256                 cfg->code_size  *= 2;
5257                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
5258                 cfg->stat_code_reallocs++;
5259         }
5260
5261         code = cfg->native_code + cfg->code_len;
5262
5263         if (mono_jit_trace_calls != NULL && mono_trace_eval (method)) {
5264                 code = mono_arch_instrument_epilog (cfg, leave_method, code, TRUE);
5265                 tracing = 1;
5266         }
5267
5268         if (method->save_lmf)
5269                 restoreLMF(code, cfg->frame_reg, cfg->stack_usage);
5270
5271         if (cfg->flags & MONO_CFG_HAS_ALLOCA) {
5272                 s390_lg  (code, STK_BASE, 0, STK_BASE, 0);
5273         } else
5274                 code = backUpStackPtr(cfg, code);
5275
5276         s390_lmg (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
5277         s390_br  (code, s390_r14);
5278
5279         cfg->code_len = code - cfg->native_code;
5280
5281         g_assert (cfg->code_len < cfg->code_size);
5282
5283 }
5284
5285 /*========================= End of Function ========================*/
5286
5287 /*------------------------------------------------------------------*/
5288 /*                                                                  */
5289 /* Name         - mono_arch_emit_exceptions                         */
5290 /*                                                                  */
5291 /* Function     - Emit the blocks to handle exception conditions.   */
5292 /*                                                                  */
5293 /*------------------------------------------------------------------*/
5294
5295 void
5296 mono_arch_emit_exceptions (MonoCompile *cfg)
5297 {
5298         MonoJumpInfo    *patch_info;
5299         guint8          *code;
5300         int             nThrows = 0,
5301                         exc_count = 0,
5302                         iExc;
5303         guint32         code_size;
5304         MonoClass       *exc_classes [MAX_EXC];
5305         guint8          *exc_throw_start [MAX_EXC];
5306
5307         for (patch_info = cfg->patch_info;
5308              patch_info;
5309              patch_info = patch_info->next) {
5310                 if (patch_info->type == MONO_PATCH_INFO_EXC)
5311                         exc_count++;
5312         }
5313
5314         code_size = exc_count * 48;
5315
5316         while ((cfg->code_len + code_size) > (cfg->code_size - 16)) {
5317                 cfg->code_size  *= 2;
5318                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
5319                 cfg->stat_code_reallocs++;
5320         }
5321
5322         code = cfg->native_code + cfg->code_len;
5323
5324         /*---------------------------------------------------------------------*/
5325         /* Add code to raise exceptions                                        */
5326         /*---------------------------------------------------------------------*/
5327         for (patch_info = cfg->patch_info; patch_info; patch_info = patch_info->next) {
5328                 switch (patch_info->type) {
5329                 case MONO_PATCH_INFO_EXC: {
5330                         guint8 *ip = patch_info->ip.i + cfg->native_code;
5331                         MonoClass *exc_class;
5332                         guint64 throw_ip;
5333
5334                         /*-----------------------------------------------------*/
5335                         /* Patch the branch in epilog to come here             */
5336                         /*-----------------------------------------------------*/
5337                         s390_patch_rel (ip + 2, (guint64) S390_RELATIVE(code,ip));
5338
5339                         exc_class = mono_class_from_name (mono_defaults.corlib,
5340                                                           "System",
5341                                                           patch_info->data.name);
5342                         g_assert (exc_class);
5343                         throw_ip = patch_info->ip.i;
5344
5345                         for (iExc = 0; iExc < nThrows; ++iExc)
5346                                 if (exc_classes [iExc] == exc_class)
5347                                         break;
5348
5349                         if (iExc < nThrows) {
5350                                 s390_jcl (code, S390_CC_UN,
5351                                           (guint64) exc_throw_start [iExc]);
5352                                 patch_info->type = MONO_PATCH_INFO_NONE;
5353                         } else {
5354
5355                                 if (nThrows < MAX_EXC) {
5356                                         exc_classes [nThrows]     = exc_class;
5357                                         exc_throw_start [nThrows] = code;
5358                                 }
5359
5360                                 /*---------------------------------------------*/
5361                                 /* Patch the parameter passed to the handler   */
5362                                 /*---------------------------------------------*/
5363                                 S390_SET  (code, s390_r2, exc_class->type_token);
5364                                 /*---------------------------------------------*/
5365                                 /* Load return address & parameter register    */
5366                                 /*---------------------------------------------*/
5367                                 s390_larl (code, s390_r14, (guint64)S390_RELATIVE((patch_info->ip.i +
5368                                                            cfg->native_code + 8), code));
5369                                 /*---------------------------------------------*/
5370                                 /* Reuse the current patch to set the jump     */
5371                                 /*---------------------------------------------*/
5372                                 patch_info->type      = MONO_PATCH_INFO_INTERNAL_METHOD;
5373                                 patch_info->data.name = "mono_arch_throw_corlib_exception";
5374                                 patch_info->ip.i      = code - cfg->native_code;
5375                                 S390_BR_TEMPLATE (code, s390_r1);
5376                         }
5377                         break;
5378                 }
5379                 default:
5380                         /* do nothing */
5381                         break;
5382                 }
5383         }
5384
5385         cfg->code_len = code - cfg->native_code;
5386
5387         g_assert (cfg->code_len < cfg->code_size);
5388
5389 }
5390
5391 /*========================= End of Function ========================*/
5392
5393 /*------------------------------------------------------------------*/
5394 /*                                                                  */
5395 /* Name         - mono_arch_finish_init                                 */
5396 /*                                                                  */
5397 /* Function     - Setup the JIT's Thread Level Specific Data.       */
5398 /*                                                                  */
5399 /*------------------------------------------------------------------*/
5400
5401 void
5402 mono_arch_finish_init (void)
5403 {
5404         appdomain_tls_offset = mono_domain_get_tls_offset();
5405         lmf_tls_offset = mono_get_lmf_tls_offset();
5406         lmf_addr_tls_offset = mono_get_lmf_addr_tls_offset();
5407 }
5408
5409 /*========================= End of Function ========================*/
5410
5411 /*------------------------------------------------------------------*/
5412 /*                                                                  */
5413 /* Name         - mono_arch_free_jit_tls_data                       */
5414 /*                                                                  */
5415 /* Function     - Free tls data.                                    */
5416 /*                                                                  */
5417 /*------------------------------------------------------------------*/
5418
5419 void
5420 mono_arch_free_jit_tls_data (MonoJitTlsData *tls)
5421 {
5422 }
5423
5424 /*========================= End of Function ========================*/
5425
5426 /*------------------------------------------------------------------*/
5427 /*                                                                  */
5428 /* Name         - mono_arch_emit_inst_for_method                    */
5429 /*                                                                  */
5430 /*------------------------------------------------------------------*/
5431
5432 MonoInst*
5433 mono_arch_emit_inst_for_method (MonoCompile *cfg, MonoMethod *cmethod, MonoMethodSignature *fsig, MonoInst **args)
5434 {
5435         return NULL;
5436 }
5437
5438 /*========================= End of Function ========================*/
5439
5440 /*------------------------------------------------------------------*/
5441 /*                                                                  */
5442 /* Name         - mono_arch_decompose_opts                          */
5443 /*                                                                  */
5444 /* Function     - Decompose opcode into a System z opcode.          */
5445 /*                                                                  */
5446 /*------------------------------------------------------------------*/
5447
5448 void
5449 mono_arch_decompose_opts (MonoCompile *cfg, MonoInst *ins)
5450 {
5451         /*
5452          * Have to rename these to avoid being decomposed normally, since the normal
5453          * decomposition does not work on S390.
5454          */
5455         switch (ins->opcode) {
5456         case OP_ISUB_OVF:
5457                 ins->opcode = OP_S390_ISUB_OVF;
5458                 break;
5459         case OP_ISUB_OVF_UN:
5460                 ins->opcode = OP_S390_ISUB_OVF_UN;
5461                 break;
5462         case OP_IADD_OVF:
5463                 ins->opcode = OP_S390_IADD_OVF;
5464                 break;
5465         case OP_IADD_OVF_UN:
5466                 ins->opcode = OP_S390_IADD_OVF_UN;
5467                 break;
5468         case OP_LADD_OVF:
5469                 ins->opcode = OP_S390_LADD_OVF;
5470                 break;
5471         case OP_LADD_OVF_UN:
5472                 ins->opcode = OP_S390_LADD_OVF_UN;
5473                 break;
5474         case OP_LSUB_OVF:
5475                 ins->opcode = OP_S390_LSUB_OVF;
5476                 break;
5477         case OP_LSUB_OVF_UN:
5478                 ins->opcode = OP_S390_LSUB_OVF_UN;
5479                 break;
5480         default:
5481                 break;
5482         }
5483 }
5484
5485 /*========================= End of Function ========================*/
5486
5487 /*------------------------------------------------------------------*/
5488 /*                                                                  */
5489 /* Name         - mono_arch_print_tree                              */
5490 /*                                                                  */
5491 /* Function     - Print platform-specific opcode details.           */
5492 /*                                                                  */
5493 /* Returns      - 1 - opcode details have been printed              */
5494 /*                0 - opcode details have not been printed          */
5495 /*                                                                  */
5496 /*------------------------------------------------------------------*/
5497
5498 gboolean
5499 mono_arch_print_tree (MonoInst *tree, int arity)
5500 {
5501         gboolean done;
5502
5503         switch (tree->opcode) {
5504                 case OP_S390_LOADARG:
5505                 case OP_S390_ARGREG:
5506                 case OP_S390_ARGPTR:
5507                         printf ("[0x%lx(%s)]", tree->inst_offset,
5508                                 mono_arch_regname (tree->inst_basereg));
5509                         done = 1;
5510                         break;
5511                 case OP_S390_STKARG:
5512                         printf ("[0x%lx(previous_frame)]",
5513                                 tree->inst_offset);
5514                         done = 1;
5515                         break;
5516                 case OP_S390_MOVE:
5517                         printf ("[0x%lx(%d,%s),0x%lx(%s)]",
5518                                 tree->inst_offset, tree->backend.size,
5519                                 mono_arch_regname(tree->dreg),
5520                                 tree->inst_imm,
5521                                 mono_arch_regname(tree->sreg1));
5522                         done = 1;
5523                         break;
5524                 case OP_S390_SETF4RET:
5525                         printf ("[f%s,f%s]",
5526                                 mono_arch_regname (tree->dreg),
5527                                 mono_arch_regname (tree->sreg1));
5528                         done = 1;
5529                         break;
5530                 case OP_TLS_GET:
5531                         printf ("[0x%lx(0x%lx,%s)]", tree->inst_offset,
5532                                 tree->inst_imm,
5533                                 mono_arch_regname (tree->sreg1));
5534                         done = 1;
5535                         break;
5536                 case OP_S390_BKCHAIN:
5537                         printf ("[previous_frame(%s)]",
5538                                 mono_arch_regname (tree->sreg1));
5539                         done = 1;
5540                 default:
5541                         done = 0;
5542         }
5543         return (done);
5544 }
5545
5546 /*========================= End of Function ========================*/
5547
5548 /*------------------------------------------------------------------*/
5549 /*                                                                  */
5550 /* Name         - mono_arch_regalloc_cost                           */
5551 /*                                                                  */
5552 /* Function     - Determine the cost, in the number of memory       */
5553 /*                references, of the action of allocating the var-  */
5554 /*                iable VMV into a register during global register  */
5555 /*                allocation.                                       */
5556 /*                                                                  */
5557 /* Returns      - Cost                                              */
5558 /*                                                                  */
5559 /*------------------------------------------------------------------*/
5560
5561 guint32
5562 mono_arch_regalloc_cost (MonoCompile *cfg, MonoMethodVar *vmv)
5563 {
5564         /* FIXME: */
5565         return 2;
5566 }
5567
5568 /*========================= End of Function ========================*/
5569
5570 /*------------------------------------------------------------------*/
5571 /*                                                                  */
5572 /* Name         - mono_arch_flush_register_windows                  */
5573 /*                                                                  */
5574 /* Function     -                                                   */
5575 /*                                                                  */
5576 /* Returns      -                                                   */
5577 /*                                                                  */
5578 /*------------------------------------------------------------------*/
5579
5580 void
5581 mono_arch_flush_register_windows (void)
5582 {
5583 }
5584
5585 /*========================= End of Function ========================*/
5586
5587 /*------------------------------------------------------------------*/
5588 /*                                                                  */
5589 /* Name         - mono_arch_is_inst_imm                             */
5590 /*                                                                  */
5591 /* Function     - Determine if operand qualifies as an immediate    */
5592 /*                value. For s390 this is a value -32768-32768      */
5593 /*                                                                  */
5594 /* Returns      - True|False - is [not] immediate value.            */
5595 /*                                                                  */
5596 /*------------------------------------------------------------------*/
5597
5598 gboolean
5599 mono_arch_is_inst_imm (gint64 imm)
5600 {
5601         return s390_is_imm32 (imm);
5602 }
5603
5604 /*========================= End of Function ========================*/
5605
5606 /*------------------------------------------------------------------*/
5607 /*                                                                  */
5608 /* Name         - mono_arch_get_patch_offset                        */
5609 /*                                                                  */
5610 /* Function     - Dummy entry point until s390x supports aot.       */
5611 /*                                                                  */
5612 /* Returns      - Offset for patch.                                 */
5613 /*                                                                  */
5614 /*------------------------------------------------------------------*/
5615
5616 guint32
5617 mono_arch_get_patch_offset (guint8 *code)
5618 {
5619         return 0;
5620 }
5621
5622 /*========================= End of Function ========================*/
5623
5624 /*------------------------------------------------------------------*/
5625 /*                                                                  */
5626 /* Name         - mono_arch_context_get_int_reg.                    */
5627 /*                                                                  */
5628 /* Function     -                                                   */
5629 /*                                                                  */
5630 /* Returns      - Return a register from the context.               */
5631 /*                                                                  */
5632 /*------------------------------------------------------------------*/
5633
5634 mgreg_t
5635 mono_arch_context_get_int_reg (MonoContext *ctx, int reg)
5636 {
5637         return ((mgreg_t) ctx->uc_mcontext.gregs[reg]);
5638 }
5639
5640 /*========================= End of Function ========================*/
5641
5642 /*------------------------------------------------------------------*/
5643 /*                                                                  */
5644 /* Name         - mono_arch_context_set_int_reg.                    */
5645 /*                                                                  */
5646 /* Function     - Set a value in a specified register.              */
5647 /*                                                                  */
5648 /*------------------------------------------------------------------*/
5649
5650 void
5651 mono_arch_context_set_int_reg (MonoContext *ctx, int reg, mgreg_t val)
5652 {
5653         ctx->uc_mcontext.gregs[reg] = val;
5654 }
5655
5656 /*========================= End of Function ========================*/
5657
5658 /*------------------------------------------------------------------*/
5659 /*                                                                  */
5660 /* Name         - mono_arch_get_this_arg_from_call.                 */
5661 /*                                                                  */
5662 /* Function     -                                                   */
5663 /*                                                                  */
5664 /*------------------------------------------------------------------*/
5665
5666 gpointer
5667 mono_arch_get_this_arg_from_call (mgreg_t *regs, guint8 *code)
5668 {
5669         return (gpointer) regs [s390_r2];
5670 }
5671
5672 /*========================= End of Function ========================*/
5673
5674 /*------------------------------------------------------------------*/
5675 /*                                                                  */
5676 /* Name         - mono_arch_install_handler_block_guard             */
5677 /*                                                                  */
5678 /* Function     -                                                   */
5679 /*                                                                  */
5680 /*------------------------------------------------------------------*/
5681
5682 gpointer
5683 mono_arch_install_handler_block_guard (MonoJitInfo *ji, MonoJitExceptionInfo *clause,
5684                                        MonoContext *ctx, gpointer new_value)
5685 {
5686         int offset;
5687         gpointer *sp, old_value;
5688         char *bp;
5689
5690         offset = clause->exvar_offset;
5691
5692         /*Load the spvar*/
5693         bp = MONO_CONTEXT_GET_BP (ctx);
5694         sp = *(gpointer*)(bp + offset);
5695
5696         old_value = *sp;
5697         if (old_value < ji->code_start || (char*)old_value > ((char*)ji->code_start + ji->code_size))
5698                 return old_value;
5699
5700         *sp = new_value;
5701
5702         return old_value;
5703 }
5704
5705 /*========================= End of Function ========================*/
5706
5707 /*------------------------------------------------------------------*/
5708 /*                                                                  */
5709 /* Name         - get_delegate_invoke_impl.                         */
5710 /*                                                                  */
5711 /* Function     -                                                   */
5712 /*                                                                  */
5713 /*------------------------------------------------------------------*/
5714
5715 static gpointer
5716 get_delegate_invoke_impl (gboolean has_target, guint32 param_count, guint32 *code_len, gboolean aot)
5717 {
5718         guint8 *code, *start;
5719
5720         if (has_target) {
5721                 int size = 32;
5722
5723                 start = code = mono_global_codeman_reserve (size);
5724
5725                 /* Replace the this argument with the target */
5726                 s390_lg   (code, s390_r1, 0, s390_r2, MONO_STRUCT_OFFSET (MonoDelegate, method_ptr));
5727                 s390_lg   (code, s390_r2, 0, s390_r2, MONO_STRUCT_OFFSET (MonoDelegate, target));
5728                 s390_br   (code, s390_r1);
5729                 g_assert ((code - start) <= size);
5730
5731                 mono_arch_flush_icache (start, size);
5732         } else {
5733                 int size, i;
5734
5735                 size = 32 + param_count * 8;
5736                 start = code = mono_global_codeman_reserve (size);
5737
5738                 s390_lg   (code, s390_r1, 0, s390_r2, MONO_STRUCT_OFFSET (MonoDelegate, method_ptr));
5739                 /* slide down the arguments */
5740                 for (i = 0; i < param_count; ++i) {
5741                         s390_lgr (code, (s390_r2 + i), (s390_r2 + i + 1));
5742                 }
5743                 s390_br   (code, s390_r1);
5744
5745                 g_assert ((code - start) <= size);
5746
5747                 mono_arch_flush_icache (start, size);
5748         }
5749
5750         mono_profiler_code_buffer_new (start, code - start, MONO_PROFILER_CODE_BUFFER_DELEGATE_INVOKE, NULL);
5751
5752         if (code_len)
5753                 *code_len = code - start;
5754
5755         return start;
5756 }
5757
5758 /*========================= End of Function ========================*/
5759
5760 /*------------------------------------------------------------------*/
5761 /*                                                                  */
5762 /* Name         - mono_arch_get_delegate_invoke_impls.              */
5763 /*                                                                  */
5764 /* Function     -                                                   */
5765 /*                                                                  */
5766 /*------------------------------------------------------------------*/
5767
5768 GSList*
5769 mono_arch_get_delegate_invoke_impls (void)
5770 {
5771         GSList *res = NULL;
5772         guint8 *code;
5773         guint32 code_len;
5774         int i;
5775         char *tramp_name;
5776
5777         code = get_delegate_invoke_impl (TRUE, 0, &code_len, TRUE);
5778         res = g_slist_prepend (res, mono_tramp_info_create ("delegate_invoke_impl_has_target", code, code_len, NULL, NULL));
5779
5780         for (i = 0; i < MAX_ARCH_DELEGATE_PARAMS; ++i) {
5781                 code = get_delegate_invoke_impl (FALSE, i, &code_len, TRUE);
5782                 tramp_name = g_strdup_printf ("delegate_invoke_impl_target_%d", i);
5783                 res = g_slist_prepend (res, mono_tramp_info_create (tramp_name, code, code_len, NULL, NULL));
5784                 g_free (tramp_name);
5785         }
5786
5787         return res;
5788 }
5789
5790 /*========================= End of Function ========================*/
5791
5792 /*------------------------------------------------------------------*/
5793 /*                                                                  */
5794 /* Name         - mono_arch_get_delegate_invoke_impl.               */
5795 /*                                                                  */
5796 /* Function     -                                                   */
5797 /*                                                                  */
5798 /*------------------------------------------------------------------*/
5799
5800 gpointer
5801 mono_arch_get_delegate_invoke_impl (MonoMethodSignature *sig, gboolean has_target)
5802 {
5803         guint8 *code, *start;
5804
5805         /* FIXME: Support more cases */
5806         if (MONO_TYPE_ISSTRUCT (sig->ret))
5807                 return NULL;
5808
5809         if (has_target) {
5810                 static guint8* cached = NULL;
5811
5812                 if (cached)
5813                         return cached;
5814
5815                 if (mono_aot_only)
5816                         start = mono_aot_get_trampoline ("delegate_invoke_impl_has_target");
5817                 else
5818                         start = get_delegate_invoke_impl (TRUE, 0, NULL, FALSE);
5819
5820                 mono_memory_barrier ();
5821
5822                 cached = start;
5823         } else {
5824                 static guint8* cache [MAX_ARCH_DELEGATE_PARAMS + 1] = {NULL};
5825                 int i;
5826
5827                 if (sig->param_count > MAX_ARCH_DELEGATE_PARAMS)
5828                         return NULL;
5829                 for (i = 0; i < sig->param_count; ++i)
5830                         if (!mono_is_regsize_var (sig->params [i]))
5831                                 return NULL;
5832
5833
5834                 code = cache [sig->param_count];
5835                 if (code)
5836                         return code;
5837
5838                 if (mono_aot_only) {
5839                         char *name = g_strdup_printf ("delegate_invoke_impl_target_%d", sig->param_count);
5840                         start = mono_aot_get_trampoline (name);
5841                         g_free (name);
5842                 } else {
5843                         start = get_delegate_invoke_impl (FALSE, sig->param_count, NULL, FALSE);
5844                 }
5845
5846                 mono_memory_barrier ();
5847
5848                 cache [sig->param_count] = start;
5849         }
5850         return start;
5851 }
5852
5853 /*========================= End of Function ========================*/
5854
5855 /*------------------------------------------------------------------*/
5856 /*                                                                  */
5857 /* Name         - mono_arch_get_delegate_virtual_invoke_impl.       */
5858 /*                                                                  */
5859 /* Function     -                                                   */
5860 /*                                                                  */
5861 /*------------------------------------------------------------------*/
5862
5863 gpointer
5864 mono_arch_get_delegate_virtual_invoke_impl (MonoMethodSignature *sig, MonoMethod *method,
5865                                             int offset, gboolean load_imt_reg)
5866 {
5867         guint8 *code, *start;
5868         int size = 40;
5869
5870         start = code = mono_global_codeman_reserve (size);
5871
5872         /*
5873         * Replace the "this" argument with the target
5874         */
5875         s390_lgr  (code, s390_r1, s390_r2);
5876         s390_lg   (code, s390_r2, 0, s390_r1, MONO_STRUCT_OFFSET(MonoDelegate, target));
5877
5878         /*
5879         * Load the IMT register, if needed
5880         */
5881         if (load_imt_reg) {
5882                 s390_lg  (code, MONO_ARCH_IMT_REG, 0, s390_r1, MONO_STRUCT_OFFSET(MonoDelegate, method));
5883         }
5884
5885         /*
5886         * Load the vTable
5887         */
5888         s390_lg  (code, s390_r1, 0, s390_r2, MONO_STRUCT_OFFSET(MonoObject, vtable));
5889         if (offset != 0) {
5890                 s390_agfi(code, s390_r1, offset);
5891         }
5892         s390_lg  (code, s390_r1, 0, s390_r1, 0);
5893         s390_br  (code, s390_r1);
5894
5895         return(start);
5896 }
5897
5898 /*========================= End of Function ========================*/
5899
5900 /*------------------------------------------------------------------*/
5901 /*                                                                  */
5902 /* Name         - mono_arch_build_imt_thunk.                        */
5903 /*                                                                  */
5904 /* Function     -                                                   */
5905 /*                                                                  */
5906 /*------------------------------------------------------------------*/
5907
5908 gpointer
5909 mono_arch_build_imt_thunk (MonoVTable *vtable, MonoDomain *domain,
5910                            MonoIMTCheckItem **imt_entries, int count,
5911                            gpointer fail_tramp)
5912 {
5913         int i;
5914         int size = 0;
5915         guchar *code, *start;
5916
5917         for (i = 0; i < count; ++i) {
5918                 MonoIMTCheckItem *item = imt_entries [i];
5919                 if (item->is_equals) {
5920                         if (item->check_target_idx) {
5921                                 if (!item->compare_done)
5922                                         item->chunk_size += CMP_SIZE + JUMP_SIZE;
5923                                 if (item->has_target_code)
5924                                         item->chunk_size += BR_SIZE + JUMP_SIZE + LOADCON_SIZE;
5925                                 else
5926                                         item->chunk_size += BR_SIZE + JUMP_SIZE + LOADCON_SIZE +
5927                                                             LOAD_SIZE;
5928                         } else {
5929                                 if (fail_tramp) {
5930                                         item->chunk_size += CMP_SIZE + 2 * BR_SIZE + JUMP_SIZE +
5931                                                             2 * LOADCON_SIZE;
5932                                         if (!item->has_target_code)
5933                                                 item->chunk_size += LOAD_SIZE;
5934                                 } else {
5935                                         item->chunk_size += LOADCON_SIZE + LOAD_SIZE + BR_SIZE;
5936 #if ENABLE_WRONG_METHOD_CHECK
5937                                         item->chunk_size += CMP_SIZE + JUMP_SIZE;
5938 #endif
5939                                 }
5940                         }
5941                 } else {
5942                         item->chunk_size += CMP_SIZE + JUMP_SIZE;
5943                         imt_entries [item->check_target_idx]->compare_done = TRUE;
5944                 }
5945                 size += item->chunk_size;
5946         }
5947
5948         if (fail_tramp)
5949                 code = mono_method_alloc_generic_virtual_thunk (domain, size);
5950         else
5951                 code = mono_domain_code_reserve (domain, size);
5952
5953         start = code;
5954
5955         for (i = 0; i < count; ++i) {
5956                 MonoIMTCheckItem *item = imt_entries [i];
5957                 item->code_target = (guint8 *) code;
5958                 if (item->is_equals) {
5959                         if (item->check_target_idx) {
5960                                 if (!item->compare_done) {
5961                                         S390_SET  (code, s390_r0, item->key);
5962                                         s390_cgr  (code, s390_r0, MONO_ARCH_IMT_REG);
5963                                 }
5964                                 item->jmp_code = (guint8*) code;
5965                                 s390_jcl (code, S390_CC_NE, 0);
5966
5967                                 if (item->has_target_code) {
5968                                         S390_SET (code, s390_r1, item->value.target_code);
5969                                 } else {
5970                                         S390_SET (code, s390_r1, (&(vtable->vtable [item->value.vtable_slot])));
5971                                         s390_lg  (code, s390_r1, 0, s390_r1, 0);
5972                                 }
5973                                 s390_br   (code, s390_r1);
5974                         } else {
5975                                 if (fail_tramp) {
5976                                         gint64  target;
5977
5978                                         S390_SET  (code, s390_r0, item->key);
5979                                         s390_cgr  (code, s390_r0, MONO_ARCH_IMT_REG);
5980                                         item->jmp_code = (guint8*) code;
5981                                         s390_jcl  (code, S390_CC_NE, 0);
5982                                         if (item->has_target_code) {
5983                                                 S390_SET (code, s390_r1, item->value.target_code);
5984                                         } else {
5985                                                 g_assert (vtable);
5986                                                 S390_SET  (code, s390_r1,
5987                                                            (&(vtable->vtable [item->value.vtable_slot])));
5988                                                 s390_lg   (code, s390_r1, 0, s390_r1, 0);
5989                                         }
5990                                         s390_br   (code, s390_r1);
5991                                         target = (gint64) S390_RELATIVE(code, item->jmp_code);
5992                                         s390_patch_rel(item->jmp_code+2, target);
5993                                         S390_SET  (code, s390_r1, fail_tramp);
5994                                         s390_br   (code, s390_r1);
5995                                         item->jmp_code = NULL;
5996                                 } else {
5997                                 /* enable the commented code to assert on wrong method */
5998 #if ENABLE_WRONG_METHOD_CHECK
5999                                         g_assert_not_reached ();
6000 #endif
6001                                         S390_SET (code, s390_r1, (&(vtable->vtable [item->value.vtable_slot])));
6002                                         s390_lg   (code, s390_r1, 0, s390_r1, 0);
6003                                         s390_br   (code, s390_r1);
6004                                 }
6005                         }
6006                 } else {
6007                         S390_SET  (code, s390_r0, item->key);
6008                         s390_cgr  (code, MONO_ARCH_IMT_REG, s390_r0);
6009                         item->jmp_code = (guint8 *) code;
6010                         s390_jcl  (code, S390_CC_GE, 0);
6011                 }
6012         }
6013         /*
6014          * patch the branches to get to the target items
6015          */
6016         for (i = 0; i < count; ++i) {
6017                 MonoIMTCheckItem *item = imt_entries [i];
6018                 if (item->jmp_code) {
6019                         if (item->check_target_idx) {
6020                                 gint64 offset;
6021                                 offset = (gint64) S390_RELATIVE(imt_entries [item->check_target_idx]->code_target,
6022                                                        item->jmp_code);
6023                                 s390_patch_rel ((guchar *) item->jmp_code + 2, (guint64) offset);
6024                         }
6025                 }
6026         }
6027
6028         mono_arch_flush_icache ((guint8*)start, (code - start));
6029         mono_profiler_code_buffer_new (start, code - start, MONO_PROFILER_CODE_BUFFER_IMT_TRAMPOLINE, NULL);
6030
6031         if (!fail_tramp)
6032                 mono_stats.imt_thunks_size += (code - start);
6033
6034         g_assert (code - start <= size);
6035
6036         return (start);
6037 }
6038
6039 /*========================= End of Function ========================*/
6040
6041 /*------------------------------------------------------------------*/
6042 /*                                                                  */
6043 /* Name         - mono_arch_find_imt_method.                        */
6044 /*                                                                  */
6045 /* Function     - Get the method address from MONO_ARCH_IMT_REG     */
6046 /*                found in the save area.                           */
6047 /*                                                                  */
6048 /*------------------------------------------------------------------*/
6049
6050 MonoMethod*
6051 mono_arch_find_imt_method (mgreg_t *regs, guint8 *code)
6052 {
6053         return ((MonoMethod *) regs [MONO_ARCH_IMT_REG]);
6054 }
6055
6056 /*========================= End of Function ========================*/
6057
6058 /*------------------------------------------------------------------*/
6059 /*                                                                  */
6060 /* Name         - mono_arch_find_static_call_vtable                 */
6061 /*                                                                  */
6062 /* Function     - Find the static call vtable.                      */
6063 /*                                                                  */
6064 /*------------------------------------------------------------------*/
6065
6066 MonoVTable*
6067 mono_arch_find_static_call_vtable (mgreg_t *regs, guint8 *code)
6068 {
6069         mgreg_t *r = (mgreg_t*)regs;
6070
6071         return (MonoVTable*)(gsize) r [MONO_ARCH_RGCTX_REG];
6072 }
6073
6074 /*========================= End of Function ========================*/
6075
6076 /*------------------------------------------------------------------*/
6077 /*                                                                  */
6078 /* Name         - mono_arch_get_cie_program                         */
6079 /*                                                                  */
6080 /* Function     - Find the static call vtable.                      */
6081 /*                                                                  */
6082 /*------------------------------------------------------------------*/
6083
6084 GSList*
6085 mono_arch_get_cie_program (void)
6086 {
6087         GSList *l = NULL;
6088
6089         mono_add_unwind_op_def_cfa (l, 0, 0, STK_BASE, 0);
6090
6091         return(l);
6092 }
6093
6094 /*========================= End of Function ========================*/
6095
6096 #ifdef MONO_ARCH_SOFT_DEBUG_SUPPORTED
6097
6098 /*------------------------------------------------------------------*/
6099 /*                                                                  */
6100 /* Name         - mono_arch_set_breakpoint.                         */
6101 /*                                                                  */
6102 /* Function     - Set a breakpoint at the native code corresponding */
6103 /*                to JI at NATIVE_OFFSET.  The location should      */
6104 /*                contain code emitted by OP_SEQ_POINT.             */
6105 /*                                                                  */
6106 /*------------------------------------------------------------------*/
6107
6108 void
6109 mono_arch_set_breakpoint (MonoJitInfo *ji, guint8 *ip)
6110 {
6111         guint8 *code = ip;
6112
6113         breakpointCode.pTrigger = bp_trigger_page;
6114         memcpy(code, (void *) &breakpointCode, BREAKPOINT_SIZE);
6115         code += BREAKPOINT_SIZE;
6116 }
6117
6118 /*========================= End of Function ========================*/
6119
6120 /*------------------------------------------------------------------*/
6121 /*                                                                  */
6122 /* Name         - mono_arch_clear_breakpoint.                       */
6123 /*                                                                  */
6124 /* Function     - Clear the breakpoint at IP.                       */
6125 /*                                                                  */
6126 /*------------------------------------------------------------------*/
6127
6128 void
6129 mono_arch_clear_breakpoint (MonoJitInfo *ji, guint8 *ip)
6130 {
6131         guint8 *code = ip;
6132         int i;
6133
6134         for (i = 0; i < (BREAKPOINT_SIZE / S390X_NOP_SIZE); i++)
6135                 s390_nop(code);
6136 }
6137
6138 /*========================= End of Function ========================*/
6139
6140 /*------------------------------------------------------------------*/
6141 /*                                                                  */
6142 /* Name         - mono_arch_is_breakpoint_event.                    */
6143 /*                                                                  */
6144 /* Function     -                                                   */
6145 /*                                                                  */
6146 /*------------------------------------------------------------------*/
6147
6148 gboolean
6149 mono_arch_is_breakpoint_event (void *info, void *sigctx)
6150 {
6151         siginfo_t* sinfo = (siginfo_t*) info;
6152
6153         /*
6154          * Sometimes the address is off by 4
6155          */
6156         if (sinfo->si_addr >= bp_trigger_page && (guint8*)sinfo->si_addr <= (guint8*)bp_trigger_page + 128)
6157                 return TRUE;
6158         else
6159                 return FALSE;
6160 }
6161
6162 /*========================= End of Function ========================*/
6163
6164 /*------------------------------------------------------------------*/
6165 /*                                                                  */
6166 /* Name         - mono_arch_skip_breakpoint.                        */
6167 /*                                                                  */
6168 /* Function     - Modify the CTX so the IP is placed after the      */
6169 /*                breakpoint instruction, so when we resume, the    */
6170 /*                instruction is not executed again.                */
6171 /*                                                                  */
6172 /*------------------------------------------------------------------*/
6173
6174 void
6175 mono_arch_skip_breakpoint (MonoContext *ctx, MonoJitInfo *ji)
6176 {
6177         MONO_CONTEXT_SET_IP (ctx, ((guint8*)MONO_CONTEXT_GET_IP (ctx) + sizeof(RXY_Format)));
6178 }
6179
6180 /*========================= End of Function ========================*/
6181
6182 /*------------------------------------------------------------------*/
6183 /*                                                                  */
6184 /* Name         - mono_arch_start_single_stepping.                  */
6185 /*                                                                  */
6186 /* Function     - Start single stepping.                            */
6187 /*                                                                  */
6188 /*------------------------------------------------------------------*/
6189
6190 void
6191 mono_arch_start_single_stepping (void)
6192 {
6193         mono_mprotect (ss_trigger_page, mono_pagesize (), 0);
6194 }
6195
6196 /*========================= End of Function ========================*/
6197
6198 /*------------------------------------------------------------------*/
6199 /*                                                                  */
6200 /* Name         - mono_arch_stop_single_stepping.                   */
6201 /*                                                                  */
6202 /* Function     - Stop single stepping.                             */
6203 /*                                                                  */
6204 /*------------------------------------------------------------------*/
6205
6206 void
6207 mono_arch_stop_single_stepping (void)
6208 {
6209         mono_mprotect (ss_trigger_page, mono_pagesize (), MONO_MMAP_READ);
6210 }
6211
6212 /*========================= End of Function ========================*/
6213
6214 /*------------------------------------------------------------------*/
6215 /*                                                                  */
6216 /* Name         - mono_arch_is_single_step_event.                   */
6217 /*                                                                  */
6218 /* Function     - Return whether the machine state in sigctx cor-   */
6219 /*                responds to a single step event.                  */
6220 /*                                                                  */
6221 /*------------------------------------------------------------------*/
6222
6223 gboolean
6224 mono_arch_is_single_step_event (void *info, void *sigctx)
6225 {
6226         siginfo_t* sinfo = (siginfo_t*) info;
6227
6228         /*
6229          * Sometimes the address is off by 4
6230          */
6231         if (sinfo->si_addr >= ss_trigger_page && (guint8*)sinfo->si_addr <= (guint8*)ss_trigger_page + 128)
6232                 return TRUE;
6233         else
6234                 return FALSE;
6235 }
6236
6237 /*========================= End of Function ========================*/
6238
6239 /*------------------------------------------------------------------*/
6240 /*                                                                  */
6241 /* Name         - mono_arch_skip_single_step.                       */
6242 /*                                                                  */
6243 /* Function     - Modify the ctx so the IP is placed after the      */
6244 /*                single step trigger instruction, so that the      */
6245 /*                instruction is not executed again.                */
6246 /*                                                                  */
6247 /*------------------------------------------------------------------*/
6248
6249 void
6250 mono_arch_skip_single_step (MonoContext *ctx)
6251 {
6252         MONO_CONTEXT_SET_IP (ctx, (guint8*)MONO_CONTEXT_GET_IP (ctx) + BREAKPOINT_SIZE);
6253 }
6254
6255 /*========================= End of Function ========================*/
6256
6257 /*------------------------------------------------------------------*/
6258 /*                                                                  */
6259 /* Name         - mono_arch_create_seq_point_info.                  */
6260 /*                                                                  */
6261 /* Function     - Return a pointer to a data struction which is     */
6262 /*                used by the sequence point implementation in      */
6263 /*                AOTed code.                                       */
6264 /*                                                                  */
6265 /*------------------------------------------------------------------*/
6266
6267 gpointer
6268 mono_arch_get_seq_point_info (MonoDomain *domain, guint8 *code)
6269 {
6270         NOT_IMPLEMENTED;
6271         return NULL;
6272 }
6273
6274 /*------------------------------------------------------------------*/
6275 /*                                                                  */
6276 /* Name         - mono_arch_init_lmf_ext.                               */
6277 /*                                                                  */
6278 /* Function -                                                       */
6279 /*                                                                  */
6280 /*------------------------------------------------------------------*/
6281
6282 void
6283 mono_arch_init_lmf_ext (MonoLMFExt *ext, gpointer prev_lmf)
6284 {
6285         ext->lmf.previous_lmf = prev_lmf;
6286         /* Mark that this is a MonoLMFExt */
6287         ext->lmf.previous_lmf = (gpointer)(((gssize)ext->lmf.previous_lmf) | 2);
6288         ext->lmf.ebp = (gssize)ext;
6289 }
6290
6291 /*========================= End of Function ========================*/
6292
6293 #endif
6294
6295 gboolean
6296 mono_arch_opcode_supported (int opcode)
6297 {
6298         switch (opcode) {
6299         case OP_ATOMIC_ADD_I4:
6300         case OP_ATOMIC_ADD_I8:
6301         case OP_ATOMIC_EXCHANGE_I4:
6302         case OP_ATOMIC_EXCHANGE_I8:
6303                 return TRUE;
6304         default:
6305                 return FALSE;
6306         }
6307 }