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 MAX(a, b) ((a) > (b) ? (a) : (b))
 235
 236 /*
 237  * imt thunking size values
 238  */
 239 #define CMP_SIZE        24
 240 #define LOADCON_SIZE    20
 241 #define LOAD_SIZE       6
 242 #define BR_SIZE         2
 243 #define JUMP_SIZE       6
 244 #define ENABLE_WRONG_METHOD_CHECK 0
 245
 246 /*========================= End of Defines =========================*/
 247
 248 /*------------------------------------------------------------------*/
 249 /*                 I n c l u d e s                                  */
 250 /*------------------------------------------------------------------*/
 251
 252 #include "mini.h"
 253 #include <string.h>
 254
 255 #include <mono/metadata/appdomain.h>
 256 #include <mono/metadata/debug-helpers.h>
 257 #include <mono/metadata/profiler-private.h>
 258 #include <mono/utils/mono-math.h>
 259
 260 #include "mini-s390x.h"
 261 #include "cpu-s390x.h"
 262 #include "jit-icalls.h"
 263 #include "ir-emit.h"
 264
 265 /*========================= End of Includes ========================*/
 266
 267 /*------------------------------------------------------------------*/
 268 /*                 T y p e d e f s                                  */
 269 /*------------------------------------------------------------------*/
 270
 271 typedef struct {
 272         guint stack_size,
 273               local_size,
 274               code_size,
 275               parm_size,
 276               offset,
 277               offStruct,
 278               retStruct;
 279 } size_data;
 280
 281 /*------------------------------------------------------------------*/
 282 /* Used by the instrument_emit_epilog                               */
 283 /*------------------------------------------------------------------*/
 284
 285 enum {
 286         SAVE_NONE,
 287         SAVE_STRUCT,
 288         SAVE_ONE,
 289         SAVE_TWO,
 290         SAVE_R4,
 291         SAVE_R8
 292 };
 293
 294 typedef struct InstList InstList;
 295
 296 struct InstList {
 297         InstList *prev;
 298         InstList *next;
 299         MonoInst *data;
 300 };
 301
 302 typedef enum {
 303         RegTypeGeneral,
 304         RegTypeBase,
 305         RegTypeFP,
 306         RegTypeFPR4,
 307         RegTypeStructByVal,
 308         RegTypeStructByValInFP,
 309         RegTypeStructByAddr,
 310         RegTypeStructByAddrOnStack
 311 } ArgStorage;
 312
 313 typedef struct {
 314         gint32  offset;         /* offset from caller's stack */
 315         gint32  offparm;        /* offset from callee's stack */
 316         guint16 vtsize;         /* in param area */
 317         guint8  reg;
 318         ArgStorage regtype;
 319         guint32 size;           /* Size of structure used by RegTypeStructByVal */
 320         gint32  type;           /* Data type of argument */
 321 } ArgInfo;
 322
 323 typedef struct {
 324         int nargs;
 325         int lastgr;
 326         guint32 stack_usage;
 327         guint32 struct_ret;
 328         ArgInfo ret;
 329         ArgInfo sigCookie;
 330         size_data sz;
 331         ArgInfo args [1];
 332 } CallInfo;
 333
 334 typedef struct {
 335         gint64  gr[5];          /* R2-R6                            */
 336         gdouble fp[3];          /* F0-F2                            */
 337 } __attribute__ ((packed)) RegParm;
 338
 339 /*========================= End of Typedefs ========================*/
 340
 341 /*------------------------------------------------------------------*/
 342 /*                   P r o t o t y p e s                            */
 343 /*------------------------------------------------------------------*/
 344
 345 static void indent (int);
 346 static guint8 * backUpStackPtr(MonoCompile *, guint8 *);
 347 static void decodeParm (MonoType *, void *, int);
 348 static void enter_method (MonoMethod *, RegParm *, char *);
 349 static void leave_method (MonoMethod *, ...);
 350 static gboolean is_regsize_var (MonoType *);
 351 static inline void add_general (guint *, size_data *, ArgInfo *);
 352 static inline void add_stackParm (guint *, size_data *, ArgInfo *, gint);
 353 static inline void add_float (guint *, size_data *, ArgInfo *);
 354 static CallInfo * get_call_info (MonoCompile *, MonoMemPool *, MonoMethodSignature *, gboolean);
 355 static guchar * emit_float_to_int (MonoCompile *, guchar *, int, int, int, gboolean);
 356 gpointer mono_arch_get_lmf_addr (void);
 357 static guint8 * emit_load_volatile_arguments (guint8 *, MonoCompile *);
 358 static void catch_SIGILL(int, siginfo_t *, void *);
 359
 360 /*========================= End of Prototypes ======================*/
 361
 362 /*------------------------------------------------------------------*/
 363 /*                 G l o b a l   V a r i a b l e s                  */
 364 /*------------------------------------------------------------------*/
 365
 366 int mono_exc_esp_offset = 0;
 367
 368 static int indent_level = 0;
 369
 370 int has_ld = 0;
 371
 372 static gboolean tls_offset_inited = FALSE;
 373
 374 static int appdomain_tls_offset = -1,
 375            thread_tls_offset = -1;
 376
 377 pthread_key_t lmf_addr_key;
 378
 379 gboolean lmf_addr_key_inited = FALSE;
 380
 381 facilityList_t facs;
 382
 383 #if 0
 384
 385 extern __thread MonoDomain *tls_appdomain;
 386 extern __thread MonoThread *tls_current_object;
 387 extern __thread gpointer   mono_lmf_addr;
 388
 389 #endif
 390
 391 /*====================== End of Global Variables ===================*/
 392
 393 /*------------------------------------------------------------------*/
 394 /*                                                                  */
 395 /* Name         - mono_arch_regname                                 */
 396 /*                                                                  */
 397 /* Function     - Returns the name of the register specified by     */
 398 /*                the input parameter.                              */
 399 /*                                                                  */
 400 /*------------------------------------------------------------------*/
 401
 402 const char*
 403 mono_arch_regname (int reg) {
 404         static const char * rnames[] = {
 405                 "s390_r0", "s390_sp", "s390_r2", "s390_r3", "s390_r4",
 406                 "s390_r5", "s390_r6", "s390_r7", "s390_r8", "s390_r9",
 407                 "s390_r10", "s390_r11", "s390_r12", "s390_r13", "s390_r14",
 408                 "s390_r15"
 409         };
 410
 411         if (reg >= 0 && reg < 16)
 412                 return rnames [reg];
 413         else
 414                 return "unknown";
 415 }
 416
 417 /*========================= End of Function ========================*/
 418
 419 /*------------------------------------------------------------------*/
 420 /*                                                                  */
 421 /* Name         - mono_arch_fregname                                */
 422 /*                                                                  */
 423 /* Function     - Returns the name of the register specified by     */
 424 /*                the input parameter.                              */
 425 /*                                                                  */
 426 /*------------------------------------------------------------------*/
 427
 428 const char*
 429 mono_arch_fregname (int reg) {
 430         static const char * rnames[] = {
 431                 "s390_f0", "s390_f1", "s390_f2", "s390_f3", "s390_f4",
 432                 "s390_f5", "s390_f6", "s390_f7", "s390_f8", "s390_f9",
 433                 "s390_f10", "s390_f11", "s390_f12", "s390_f13", "s390_f14",
 434                 "s390_f15"
 435         };
 436
 437         if (reg >= 0 && reg < 16)
 438                 return rnames [reg];
 439         else
 440                 return "unknown";
 441 }
 442
 443 /*========================= End of Function ========================*/
 444
 445 /*------------------------------------------------------------------*/
 446 /*                                                                  */
 447 /* Name         - arch_get_argument_info                            */
 448 /*                                                                  */
 449 /* Function     - Gathers information on parameters such as size,   */
 450 /*                alignment, and padding. arg_info should be large  */
 451 /*                enough to hold param_count + 1 entries.           */
 452 /*                                                                  */
 453 /* Parameters   - @csig - Method signature                          */
 454 /*                @param_count - No. of parameters to consider      */
 455 /*                @arg_info - An array to store the result info     */
 456 /*                                                                  */
 457 /* Returns      - Size of the activation frame                      */
 458 /*                                                                  */
 459 /*------------------------------------------------------------------*/
 460
 461 int
 462 mono_arch_get_argument_info (MonoMethodSignature *csig,
 463                              int param_count,
 464                              MonoJitArgumentInfo *arg_info)
 465 {
 466         int k, frame_size = 0;
 467         int size, align, pad;
 468         int offset = 8;
 469
 470         if (MONO_TYPE_ISSTRUCT (csig->ret)) {
 471                 frame_size += sizeof (gpointer);
 472                 offset += 8;
 473         }
 474
 475         arg_info [0].offset = offset;
 476
 477         if (csig->hasthis) {
 478                 frame_size += sizeof (gpointer);
 479                 offset += 8;
 480         }
 481
 482         arg_info [0].size = frame_size;
 483
 484         for (k = 0; k < param_count; k++) {
 485
 486                 if (csig->pinvoke)
 487                         size = mono_type_native_stack_size (csig->params [k], (guint32 *) &align);
 488                 else
 489                         size = mini_type_stack_size (NULL, csig->params [k], &align);
 490
 491                 frame_size += pad = (align - (frame_size & (align - 1))) & (align - 1);
 492                 arg_info [k].pad = pad;
 493                 frame_size += size;
 494                 arg_info [k + 1].pad = 0;
 495                 arg_info [k + 1].size = size;
 496                 offset += pad;
 497                 arg_info [k + 1].offset = offset;
 498                 offset += size;
 499         }
 500
 501         align = MONO_ARCH_FRAME_ALIGNMENT;
 502         frame_size += pad = (align - (frame_size & (align - 1))) & (align - 1);
 503         arg_info [k].pad = pad;
 504
 505         return frame_size;
 506 }
 507
 508 /*========================= End of Function ========================*/
 509
 510 /*------------------------------------------------------------------*/
 511 /*                                                                  */
 512 /* Name         - retFitsInReg.                                     */
 513 /*                                                                  */
 514 /* Function     - Determines if a value can be returned in one or   */
 515 /*                two registers.                                    */
 516 /*                                                                  */
 517 /*------------------------------------------------------------------*/
 518
 519 static inline gboolean
 520 retFitsInReg(guint32 size)
 521 {
 522         switch (size) {
 523                 case 0:
 524                 case 1:
 525                 case 2:
 526                 case 4:
 527                 case 8:
 528                         return (TRUE);
 529                 break;
 530                 default:
 531                         return (FALSE);
 532         }
 533 }
 534
 535 /*========================= End of Function ========================*/
 536
 537 /*------------------------------------------------------------------*/
 538 /*                                                                  */
 539 /* Name         - backStackPtr.                                     */
 540 /*                                                                  */
 541 /* Function     - Restore Stack Pointer to previous frame.          */
 542 /*                                                                  */
 543 /*------------------------------------------------------------------*/
 544
 545 static inline guint8 *
 546 backUpStackPtr(MonoCompile *cfg, guint8 *code)
 547 {
 548         int stackSize = cfg->stack_usage;
 549
 550         if (s390_is_imm16 (stackSize)) {
 551                 s390_aghi  (code, STK_BASE, stackSize);
 552         } else {
 553                 while (stackSize > 32767) {
 554                         s390_aghi  (code, STK_BASE, 32767);
 555                         stackSize -= 32767;
 556                 }
 557                 s390_aghi  (code, STK_BASE, stackSize);
 558         }
 559         return (code);
 560 }
 561
 562 /*========================= End of Function ========================*/
 563
 564 /*------------------------------------------------------------------*/
 565 /*                                                                  */
 566 /* Name         - indent                                            */
 567 /*                                                                  */
 568 /* Function     - Perform nice indenting to current level           */
 569 /*                                                                  */
 570 /*------------------------------------------------------------------*/
 571
 572 static void
 573 indent (int diff) {
 574         int v;
 575         if (diff < 0)
 576                 indent_level += diff;
 577         v = indent_level;
 578         printf("[%3d] ",v);
 579         while (v-- > 0) {
 580                 printf (". ");
 581         }
 582         if (diff > 0)
 583                 indent_level += diff;
 584 }
 585
 586 /*========================= End of Function ========================*/
 587
 588 /*------------------------------------------------------------------*/
 589 /*                                                                  */
 590 /* Name         - decodeParm                                        */
 591 /*                                                                  */
 592 /* Function     - Decode a parameter for the trace.                 */
 593 /*                                                                  */
 594 /*------------------------------------------------------------------*/
 595
 596 static void
 597 decodeParm(MonoType *type, void *curParm, int size)
 598 {
 599         guint32 simpleType;
 600
 601         if (type->byref) {
 602                 printf("[BYREF:%p], ", *((char **) curParm));
 603         } else {
 604                 simpleType = mono_type_get_underlying_type(type)->type;
 605 enum_parmtype:
 606                 switch (simpleType) {
 607                         case MONO_TYPE_I :
 608                                 printf ("[INTPTR:%p], ", *((int **) curParm));
 609                                 break;
 610                         case MONO_TYPE_U :
 611                                 printf ("[UINTPTR:%p], ", *((int **) curParm));
 612                                 break;
 613                         case MONO_TYPE_BOOLEAN :
 614                                 printf ("[BOOL:%ld], ", *((gint64 *) curParm));
 615                                 break;
 616                         case MONO_TYPE_CHAR :
 617                                 printf ("[CHAR:%c], ", *((int  *) curParm));
 618                                 break;
 619                         case MONO_TYPE_I1 :
 620                                 printf ("[INT1:%ld], ", *((gint64 *) curParm));
 621                                 break;
 622                         case MONO_TYPE_I2 :
 623                                 printf ("[INT2:%ld], ", *((gint64 *) curParm));
 624                                 break;
 625                         case MONO_TYPE_I4 :
 626                                 printf ("[INT4:%ld], ", *((gint64 *) curParm));
 627                                 break;
 628                         case MONO_TYPE_U1 :
 629                                 printf ("[UINT1:%lu], ", *((guint64 *) curParm));
 630                                 break;
 631                         case MONO_TYPE_U2 :
 632                                 printf ("[UINT2:%lu], ", *((guint64 *) curParm));
 633                                 break;
 634                         case MONO_TYPE_U4 :
 635                                 printf ("[UINT4:%lu], ", *((guint64 *) curParm));
 636                                 break;
 637                         case MONO_TYPE_U8 :
 638                                 printf ("[UINT8:%lu], ", *((guint64 *) curParm));
 639                                 break;
 640                         case MONO_TYPE_STRING : {
 641                                 MonoString *s = *((MonoString **) curParm);
 642                                 if (s) {
 643                                         g_assert (((MonoObject *) s)->vtable->klass == mono_defaults.string_class);
 644                                         printf("[STRING:%p:%s], ", s, mono_string_to_utf8(s));
 645                                 } else {
 646                                         printf("[STRING:null], ");
 647                                 }
 648                                 break;
 649                         }
 650                         case MONO_TYPE_CLASS :
 651                         case MONO_TYPE_OBJECT : {
 652                                 MonoObject *obj = *((MonoObject **) curParm);
 653                                 MonoClass *class;
 654                                 if ((obj) && (obj->vtable)) {
 655                                         printf("[CLASS/OBJ:");
 656                                         class = obj->vtable->klass;
 657                                         printf("%p [%p] ",obj,curParm);
 658                                         if (class == mono_defaults.string_class) {
 659                                                 printf("[STRING:%p:%s]",
 660                                                        obj, mono_string_to_utf8 ((MonoString *) obj));
 661                                         } else if (class == mono_defaults.int32_class) {
 662                                                 printf("[INT32:%p:%d]",
 663                                                         obj, *(gint32 *)((char *)obj + sizeof (MonoObject)));
 664                                         } else
 665                                                 printf("[%s.%s:%p]",
 666                                                        class->name_space, class->name, obj);
 667                                         printf("], ");
 668                                 } else {
 669                                         printf("[OBJECT:null], ");
 670                                 }
 671                                 break;
 672                         }
 673                         case MONO_TYPE_PTR :
 674                                 printf("[PTR:%p], ", *((gpointer **) (curParm)));
 675                                 break;
 676                         case MONO_TYPE_FNPTR :
 677                                 printf("[FNPTR:%p], ", *((gpointer **) (curParm)));
 678                                 break;
 679                         case MONO_TYPE_ARRAY :
 680                                 printf("[ARRAY:%p], ", *((gpointer **) (curParm)));
 681                                 break;
 682                         case MONO_TYPE_SZARRAY :
 683                                 printf("[SZARRAY:%p], ", *((gpointer **) (curParm)));
 684                                 break;
 685                         case MONO_TYPE_I8 :
 686                                 printf("[INT8:%ld], ", *((gint64 *) (curParm)));
 687                                 break;
 688                         case MONO_TYPE_R4 :
 689                                 printf("[FLOAT4:%g], ", *((float *) (curParm)));
 690                                 break;
 691                         case MONO_TYPE_R8 :
 692                                 printf("[FLOAT8:%g], ", *((double *) (curParm)));
 693                                 break;
 694                         case MONO_TYPE_VALUETYPE : {
 695                                 int i;
 696                                 MonoMarshalType *info;
 697
 698                                 if (type->data.klass->enumtype) {
 699                                         simpleType = mono_class_enum_basetype (type->data.klass)->type;
 700                                         printf("{VALUETYPE} - ");
 701                                         goto enum_parmtype;
 702                                 }
 703
 704                                 info = mono_marshal_load_type_info (type->data.klass);
 705
 706                                 if ((info->native_size == sizeof(float)) &&
 707                                     (info->num_fields  == 1) &&
 708                                     (info->fields[0].field->type->type == MONO_TYPE_R4)) {
 709                                                 printf("[FLOAT4:%f], ", *((float *) (curParm)));
 710                                         break;
 711                                 }
 712
 713                                 if ((info->native_size == sizeof(double)) &&
 714                                     (info->num_fields  == 1) &&
 715                                     (info->fields[0].field->type->type == MONO_TYPE_R8)) {
 716                                         printf("[FLOAT8:%g], ", *((double *) (curParm)));
 717                                         break;
 718                                 }
 719
 720                                 printf("[VALUETYPE:");
 721                                 for (i = 0; i < size; i++)
 722                                         printf("%02x,", *((guint8 *)curParm+i));
 723                                 printf("]");
 724                                 break;
 725                         }
 726                         case MONO_TYPE_TYPEDBYREF: {
 727                                 int i;
 728                                 printf("[TYPEDBYREF:");
 729                                 for (i = 0; i < size; i++)
 730                                         printf("%02x,", *((guint8 *)curParm+i));
 731                                 printf("]");
 732                                 break;
 733                         }
 734                         default :
 735                                 printf("[?? - %d], ",simpleType);
 736                 }
 737         }
 738 }
 739
 740 /*========================= End of Function ========================*/
 741
 742 /*------------------------------------------------------------------*/
 743 /*                                                                  */
 744 /* Name         - enter_method                                      */
 745 /*                                                                  */
 746 /* Function     - Perform tracing of the entry to the current       */
 747 /*                method.                                           */
 748 /*                                                                  */
 749 /*------------------------------------------------------------------*/
 750
 751 static void
 752 enter_method (MonoMethod *method, RegParm *rParm, char *sp)
 753 {
 754         int i, oParm = 0, iParm = 0;
 755         MonoClass *class;
 756         MonoObject *obj;
 757         MonoMethodSignature *sig;
 758         char *fname;
 759         guint64 ip;
 760         CallInfo *cinfo;
 761         ArgInfo *ainfo;
 762         void *curParm;
 763
 764         fname = mono_method_full_name (method, TRUE);
 765         indent (1);
 766         printf ("ENTER: %s ", fname);
 767         g_free (fname);
 768
 769         ip  = (*(guint64 *) (sp+S390_RET_ADDR_OFFSET));
 770         printf ("ip: %p sp: %p - ", (gpointer) ip, sp);
 771
 772         if (rParm == NULL)
 773                 return;
 774
 775         sig = mono_method_signature (method);
 776
 777         cinfo = get_call_info (NULL, NULL, sig, sig->pinvoke);
 778
 779         if (cinfo->struct_ret) {
 780                 printf ("[STRUCTRET:%p], ", (gpointer) rParm->gr[0]);
 781                 iParm = 1;
 782         }
 783
 784         if (sig->hasthis) {
 785                 gpointer *this = (gpointer *) rParm->gr[iParm];
 786                 obj = (MonoObject *) this;
 787                 if (method->klass->valuetype) {
 788                         if (obj) {
 789                                 printf("this:[value:%p:%016lx], ",
 790                                        this, *((guint64 *)(this+sizeof(MonoObject))));
 791                         } else
 792                                 printf ("this:[NULL], ");
 793                 } else {
 794                         if (obj) {
 795                                 class = obj->vtable->klass;
 796                                 if (class == mono_defaults.string_class) {
 797                                         printf ("this:[STRING:%p:%s], ",
 798                                                 obj, mono_string_to_utf8 ((MonoString *)obj));
 799                                 } else {
 800                                         printf ("this:%p[%s.%s], ",
 801                                                 obj, class->name_space, class->name);
 802                                 }
 803                         } else
 804                                 printf ("this:NULL, ");
 805                 }
 806                 oParm++;
 807         }
 808
 809         for (i = 0; i < sig->param_count; ++i) {
 810                 ainfo = &cinfo->args[i + oParm];
 811                 switch (ainfo->regtype) {
 812                         case RegTypeGeneral :
 813                                 decodeParm(sig->params[i], &(rParm->gr[ainfo->reg-2]), ainfo->size);
 814                                 break;
 815                         case RegTypeFP :
 816                                 decodeParm(sig->params[i], &(rParm->fp[ainfo->reg]), ainfo->size);
 817                                 break;
 818                         case RegTypeBase :
 819                                 decodeParm(sig->params[i], sp+ainfo->offset, ainfo->size);
 820                                 break;
 821                         case RegTypeStructByVal :
 822                                 if (ainfo->reg != STK_BASE) {
 823                                         int offset = sizeof(glong) - ainfo->size;
 824                                         curParm = &(rParm->gr[ainfo->reg-2])+offset;
 825                                 }
 826                                 else
 827                                         curParm = sp+ainfo->offset;
 828
 829                                 if (retFitsInReg (ainfo->vtsize))
 830                                         decodeParm(sig->params[i],
 831                                                    curParm,
 832                                                    ainfo->size);
 833                                 else
 834                                         decodeParm(sig->params[i],
 835                                                    *((char **) curParm),
 836                                                    ainfo->vtsize);
 837                                 break;
 838                         case RegTypeStructByAddr :
 839                                 if (ainfo->reg != STK_BASE)
 840                                         curParm = &(rParm->gr[ainfo->reg-2]);
 841                                 else
 842                                         curParm = sp+ainfo->offset;
 843
 844                                 decodeParm(sig->params[i],
 845                                            *((char **) curParm),
 846                                            ainfo->vtsize);
 847                                 break;
 848
 849                         default :
 850                                 printf("???, ");
 851                 }
 852         }
 853         printf("\n");
 854         g_free(cinfo);
 855 }
 856
 857 /*========================= End of Function ========================*/
 858
 859 /*------------------------------------------------------------------*/
 860 /*                                                                  */
 861 /* Name         - leave_method                                      */
 862 /*                                                                  */
 863 /* Function     -                                                   */
 864 /*                                                                  */
 865 /*------------------------------------------------------------------*/
 866
 867 static void
 868 leave_method (MonoMethod *method, ...)
 869 {
 870         MonoType *type;
 871         char *fname;
 872         guint64 ip;
 873         va_list ap;
 874
 875         va_start(ap, method);
 876
 877         fname = mono_method_full_name (method, TRUE);
 878         indent (-1);
 879         printf ("LEAVE: %s", fname);
 880         g_free (fname);
 881
 882         type = mono_method_signature (method)->ret;
 883
 884 handle_enum:
 885         switch (type->type) {
 886         case MONO_TYPE_VOID:
 887                 break;
 888         case MONO_TYPE_BOOLEAN: {
 889                 int val = va_arg (ap, int);
 890                 if (val)
 891                         printf ("[TRUE:%d]", val);
 892                 else
 893                         printf ("[FALSE]");
 894
 895                 break;
 896         }
 897         case MONO_TYPE_CHAR: {
 898                 int val = va_arg (ap, int);
 899                 printf ("[CHAR:%d]", val);
 900                 break;
 901         }
 902         case MONO_TYPE_I1: {
 903                 int val = va_arg (ap, int);
 904                 printf ("[INT1:%d]", val);
 905                 break;
 906         }
 907         case MONO_TYPE_U1: {
 908                 int val = va_arg (ap, int);
 909                 printf ("[UINT1:%d]", val);
 910                 break;
 911         }
 912         case MONO_TYPE_I2: {
 913                 int val = va_arg (ap, int);
 914                 printf ("[INT2:%d]", val);
 915                 break;
 916         }
 917         case MONO_TYPE_U2: {
 918                 int val = va_arg (ap, int);
 919                 printf ("[UINT2:%d]", val);
 920                 break;
 921         }
 922         case MONO_TYPE_I4: {
 923                 int val = va_arg (ap, int);
 924                 printf ("[INT4:%d]", val);
 925                 break;
 926         }
 927         case MONO_TYPE_U4: {
 928                 int val = va_arg (ap, int);
 929                 printf ("[UINT4:%d]", val);
 930                 break;
 931         }
 932         case MONO_TYPE_I: {
 933                 gint64 val = va_arg (ap, gint64);
 934                 printf ("[INT:%ld]", val);
 935                 printf("]");
 936                 break;
 937         }
 938         case MONO_TYPE_U: {
 939                 gint64 val = va_arg (ap, gint64);
 940                 printf ("[UINT:%lu]", val);
 941                 printf("]");
 942                 break;
 943         }
 944         case MONO_TYPE_STRING: {
 945                 MonoString *s = va_arg (ap, MonoString *);
 946 ;
 947                 if (s) {
 948                         g_assert (((MonoObject *)s)->vtable->klass == mono_defaults.string_class);
 949                         printf ("[STRING:%p:%s]", s, mono_string_to_utf8 (s));
 950                 } else
 951                         printf ("[STRING:null], ");
 952                 break;
 953         }
 954         case MONO_TYPE_CLASS:
 955         case MONO_TYPE_OBJECT: {
 956                 MonoObject *o = va_arg (ap, MonoObject *);
 957
 958                 if ((o) && (o->vtable)) {
 959                         if (o->vtable->klass == mono_defaults.boolean_class) {
 960                                 printf ("[BOOLEAN:%p:%d]", o, *((guint8 *)o + sizeof (MonoObject)));
 961                         } else if  (o->vtable->klass == mono_defaults.int32_class) {
 962                                 printf ("[INT32:%p:%d]", o, *((gint32 *)((char *)o + sizeof (MonoObject))));
 963                         } else if  (o->vtable->klass == mono_defaults.int64_class) {
 964                                 printf ("[INT64:%p:%ld]", o, *((gint64 *)((char *)o + sizeof (MonoObject))));
 965                         } else
 966                                 printf ("[%s.%s:%p]", o->vtable->klass->name_space, o->vtable->klass->name, o);
 967                 } else
 968                         printf ("[OBJECT:%p]", o);
 969
 970                 break;
 971         }
 972         case MONO_TYPE_PTR:
 973         case MONO_TYPE_FNPTR:
 974         case MONO_TYPE_ARRAY:
 975         case MONO_TYPE_SZARRAY: {
 976                 gpointer p = va_arg (ap, gpointer);
 977                 printf ("[result=%p]", p);
 978                 break;
 979         }
 980         case MONO_TYPE_I8: {
 981                 gint64 l =  va_arg (ap, gint64);
 982                 printf ("[LONG:%ld]", l);
 983                 break;
 984         }
 985         case MONO_TYPE_U8: {
 986                 guint64 l =  va_arg (ap, guint64);
 987                 printf ("[ULONG:%lu]", l);
 988                 break;
 989         }
 990         case MONO_TYPE_R4: {
 991                 double f = va_arg (ap, double);
 992                 printf ("[FLOAT4:%g]\n", f);
 993                 break;
 994         }
 995         case MONO_TYPE_R8: {
 996                 double f = va_arg (ap, double);
 997                 printf ("[FLOAT8:%g]\n", f);
 998                 break;
 999         }
1000         case MONO_TYPE_VALUETYPE: {
1001                 MonoMarshalType *info;
1002                 if (type->data.klass->enumtype) {
1003                         type = mono_class_enum_basetype (type->data.klass);
1004                         goto handle_enum;
1005                 } else {
1006                         int size, align;
1007
1008                         info = mono_marshal_load_type_info (type->data.klass);
1009
1010                         if ((info->native_size == sizeof(float)) &&
1011                             (info->num_fields  == 1) &&
1012                             (info->fields[0].field->type->type == MONO_TYPE_R4)) {
1013                                 double f = va_arg (ap, double);
1014                                 printf("[FLOAT4:%g]\n", (double) f);
1015                                 break;
1016                         }
1017
1018                         if ((info->native_size == sizeof(double)) &&
1019                             (info->num_fields  == 1) &&
1020                             (info->fields[0].field->type->type == MONO_TYPE_R8)) {
1021                                 double f = va_arg (ap, double);
1022                                 printf("[FLOAT8:%g]\n", f);
1023                                 break;
1024                         }
1025
1026                         size = mono_type_size (type, &align);
1027                         switch (size) {
1028                                 case 1: {
1029                                         guint32 p = va_arg (ap, guint32);
1030                                         printf ("[%02x]\n",p);
1031                                         break;
1032                                 }
1033                                 case 2: {
1034                                         guint32 p = va_arg (ap, guint32);
1035                                         printf ("[%04x]\n",p);
1036                                         break;
1037                                 }
1038                                 case 4: {
1039                                         guint32 p = va_arg (ap, guint32);
1040                                         printf ("[%08x]\n",p);
1041                                         break;
1042                                 }
1043                                 case 8: {
1044                                         guint64 p = va_arg (ap, guint64);
1045                                         printf ("[%016lx]\n",p);
1046                                         break;
1047                                 }
1048                                 default: {
1049                                         gpointer p = va_arg (ap, gpointer);
1050                                         printf ("[VALUETYPE] %p\n",p);
1051                                 }
1052                         }
1053                 }
1054                 break;
1055         }
1056         case MONO_TYPE_TYPEDBYREF: {
1057                 guint8 *p = va_arg (ap, gpointer);
1058                 int j, size, align;
1059                 size = mono_type_size (type, &align);
1060                 switch (size) {
1061                 case 1:
1062                 case 2:
1063                 case 4:
1064                 case 8:
1065                         printf ("[");
1066                         for (j = 0; p && j < size; j++)
1067                                 printf ("%02x,", p [j]);
1068                         printf ("]\n");
1069                         break;
1070                 default:
1071                         printf ("[TYPEDBYREF]\n");
1072                 }
1073         }
1074                 break;
1075         default:
1076                 printf ("(unknown return type %x)",
1077                         mono_method_signature (method)->ret->type);
1078         }
1079
1080         ip = ((gint64) __builtin_return_address (0));
1081         printf (" ip: %p\n", (gpointer) ip);
1082 }
1083
1084 /*========================= End of Function ========================*/
1085
1086 /*------------------------------------------------------------------*/
1087 /*                                                                  */
1088 /* Name         - catch_SIGILL                                      */
1089 /*                                                                  */
1090 /* Function     - Catch SIGILL as a result of testing for long      */
1091 /*                displacement facility.                            */
1092 /*                                                                  */
1093 /*------------------------------------------------------------------*/
1094
1095 void
1096 catch_SIGILL(int sigNo, siginfo_t *info, void *act) {
1097
1098         has_ld = 0;
1099
1100 }
1101
1102 /*========================= End of Function ========================*/
1103
1104 /*------------------------------------------------------------------*/
1105 /*                                                                  */
1106 /* Name         - mono_arch_cpu_init                                */
1107 /*                                                                  */
1108 /* Function     - Perform CPU specific initialization to execute    */
1109 /*                managed code.                                     */
1110 /*                                                                  */
1111 /*------------------------------------------------------------------*/
1112
1113 void
1114 mono_arch_cpu_init (void)
1115 {
1116         struct sigaction sa,
1117                          *oldSa = NULL;
1118         guint mode = 1;
1119
1120         /*--------------------------------------*/
1121         /* Set default rounding mode for FP     */
1122         /*--------------------------------------*/
1123         __asm__ ("SRNM\t%0\n\t"
1124                 : : "m" (mode));
1125
1126         /*--------------------------------------*/
1127         /* Determine if we have long displace-  */
1128         /* ment facility on this processor      */
1129         /*--------------------------------------*/
1130         sa.sa_sigaction = catch_SIGILL;
1131         sigemptyset (&sa.sa_mask);
1132         sa.sa_flags = SA_SIGINFO;
1133
1134         sigaction (SIGILL, &sa, oldSa);
1135
1136         /*--------------------------------------*/
1137         /* We test by executing the STY inst    */
1138         /*--------------------------------------*/
1139         __asm__ ("LGHI\t0,1\n\t"
1140                  "LA\t1,%0\n\t"
1141                  ".byte\t0xe3,0x00,0x10,0x00,0x00,0x50\n\t"
1142                 : "=m" (has_ld) : : "0", "1");
1143
1144         sigaction (SIGILL, oldSa, NULL);
1145 }
1146
1147 /*========================= End of Function ========================*/
1148
1149 /*------------------------------------------------------------------*/
1150 /*                                                                  */
1151 /* Name         - mono_arch_init.                                   */
1152 /*                                                                  */
1153 /* Function     - Initialize architecture specific code.            */
1154 /*                                                                  */
1155 /*------------------------------------------------------------------*/
1156
1157 void
1158 mono_arch_init (void)
1159 {
1160 #if 0
1161         /*
1162          * When we do an architectural level set at z9 or better
1163          * we can use the STFLE instruction to show us
1164          * what hardware facilities are available
1165          */
1166         int lFacility = sizeof(facs) % 8;
1167
1168         memset((char *) &facs, 0, sizeof(facs));
1169
1170         __asm__ ("      lgfr    0,%1\n"
1171                  "      stfle   %0\n"
1172                  : "=m" (facs) : "r" (lFacility) : "0", "cc");
1173 #endif
1174
1175 }
1176
1177 /*========================= End of Function ========================*/
1178
1179 /*------------------------------------------------------------------*/
1180 /*                                                                  */
1181 /* Name         - mono_arch_cleanup.                                */
1182 /*                                                                  */
1183 /* Function     - Cleanup architecture specific code    .           */
1184 /*                                                                  */
1185 /*------------------------------------------------------------------*/
1186
1187 void
1188 mono_arch_cleanup (void)
1189 {
1190 }
1191
1192 /*========================= End of Function ========================*/
1193
1194 /*------------------------------------------------------------------*/
1195 /*                                                                  */
1196 /* Name         - mono_arch_cpu_optimizazions                       */
1197 /*                                                                  */
1198 /* Function     - Returns the optimizations supported on this CPU   */
1199 /*                                                                  */
1200 /*------------------------------------------------------------------*/
1201
1202 guint32
1203 mono_arch_cpu_optimizazions (guint32 *exclude_mask)
1204 {
1205         guint32 opts = 0;
1206
1207         /*----------------------------------------------------------*/
1208         /* No s390-specific optimizations yet                       */
1209         /*----------------------------------------------------------*/
1210         *exclude_mask = MONO_OPT_INLINE|MONO_OPT_LINEARS;
1211 //      *exclude_mask = MONO_OPT_INLINE;
1212         return opts;
1213 }
1214
1215 /*========================= End of Function ========================*/
1216
1217 /*------------------------------------------------------------------*/
1218 /*                                                                  */
1219 /* Name         -                                                   */
1220 /*                                                                  */
1221 /* Function     -                                                   */
1222 /*                                                                  */
1223 /*------------------------------------------------------------------*/
1224
1225 static gboolean
1226 is_regsize_var (MonoType *t) {
1227         if (t->byref)
1228                 return TRUE;
1229         switch (mono_type_get_underlying_type (t)->type) {
1230         case MONO_TYPE_I4:
1231         case MONO_TYPE_U4:
1232         case MONO_TYPE_I:
1233         case MONO_TYPE_I8:
1234         case MONO_TYPE_U8:
1235         case MONO_TYPE_U:
1236         case MONO_TYPE_PTR:
1237         case MONO_TYPE_FNPTR:
1238                 return TRUE;
1239         case MONO_TYPE_OBJECT:
1240         case MONO_TYPE_STRING:
1241         case MONO_TYPE_CLASS:
1242         case MONO_TYPE_SZARRAY:
1243         case MONO_TYPE_ARRAY:
1244                 return FALSE;
1245         case MONO_TYPE_VALUETYPE:
1246                 if (t->data.klass->enumtype)
1247                         return is_regsize_var (mono_class_enum_basetype (t->data.klass));
1248                 return FALSE;
1249         }
1250         return FALSE;
1251 }
1252
1253 /*========================= End of Function ========================*/
1254
1255 /*------------------------------------------------------------------*/
1256 /*                                                                  */
1257 /* Name         - mono_arch_get_allocatable_int_vars                */
1258 /*                                                                  */
1259 /* Function     -                                                   */
1260 /*                                                                  */
1261 /*------------------------------------------------------------------*/
1262
1263 GList *
1264 mono_arch_get_allocatable_int_vars (MonoCompile *cfg)
1265 {
1266         GList *vars = NULL;
1267         int i;
1268
1269         for (i = 0; i < cfg->num_varinfo; i++) {
1270                 MonoInst *ins = cfg->varinfo [i];
1271                 MonoMethodVar *vmv = MONO_VARINFO (cfg, i);
1272
1273                 /* unused vars */
1274                 if (vmv->range.first_use.abs_pos >= vmv->range.last_use.abs_pos)
1275                         continue;
1276
1277                 if (ins->flags & (MONO_INST_VOLATILE|MONO_INST_INDIRECT) ||
1278                     (ins->opcode != OP_LOCAL && ins->opcode != OP_ARG))
1279                         continue;
1280
1281                 /* we can only allocate 32 bit values */
1282                 if (is_regsize_var (ins->inst_vtype)) {
1283                         g_assert (MONO_VARINFO (cfg, i)->reg == -1);
1284                         g_assert (i == vmv->idx);
1285                         vars = mono_varlist_insert_sorted (cfg, vars, vmv, FALSE);
1286                 }
1287         }
1288
1289         return vars;
1290 }
1291
1292 /*========================= End of Function ========================*/
1293
1294 /*------------------------------------------------------------------*/
1295 /*                                                                  */
1296 /* Name         - mono_arch_global_int_regs                         */
1297 /*                                                                  */
1298 /* Function     - Return a list of usable integer registers.        */
1299 /*                                                                  */
1300 /*------------------------------------------------------------------*/
1301
1302 GList *
1303 mono_arch_get_global_int_regs (MonoCompile *cfg)
1304 {
1305         GList *regs = NULL;
1306         MonoMethodHeader *header;
1307         int i, top = 13;
1308
1309         header = cfg->header;
1310         if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
1311                 cfg->frame_reg = s390_r11;
1312
1313
1314         /* FIXME: s390_r12 is reserved for bkchain_reg. Only reserve it if needed */
1315         top = 12;
1316         for (i = 8; i < top; ++i) {
1317                 if (cfg->frame_reg != i)
1318                         regs = g_list_prepend (regs, GUINT_TO_POINTER (i));
1319         }
1320
1321         return regs;
1322 }
1323
1324 /*========================= End of Function ========================*/
1325
1326 /*------------------------------------------------------------------*/
1327 /*                                                                  */
1328 /* Name         -  mono_arch_flush_icache                           */
1329 /*                                                                  */
1330 /* Function     -  Flush the CPU icache.                            */
1331 /*                                                                  */
1332 /*------------------------------------------------------------------*/
1333
1334 void
1335 mono_arch_flush_icache (guint8 *code, gint size)
1336 {
1337 }
1338
1339 /*========================= End of Function ========================*/
1340
1341 /*------------------------------------------------------------------*/
1342 /*                                                                  */
1343 /* Name         - add_general                                       */
1344 /*                                                                  */
1345 /* Function     - Determine code and stack size incremements for a  */
1346 /*                parameter.                                        */
1347 /*                                                                  */
1348 /*------------------------------------------------------------------*/
1349
1350 static void inline
1351 add_general (guint *gr, size_data *sz, ArgInfo *ainfo)
1352 {
1353         if (*gr > S390_LAST_ARG_REG) {
1354                 sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1355                 ainfo->offset   = sz->stack_size;
1356                 ainfo->reg      = STK_BASE;
1357                 ainfo->regtype  = RegTypeBase;
1358                 sz->stack_size += sizeof(long);
1359                 sz->local_size += sizeof(long);
1360                 sz->offStruct  += sizeof(long);
1361                 sz->code_size  += 12;
1362         } else {
1363                 ainfo->reg      = *gr;
1364                 sz->code_size  += 8;
1365         }
1366         (*gr) ++;
1367 }
1368
1369 /*========================= End of Function ========================*/
1370
1371 /*------------------------------------------------------------------*/
1372 /*                                                                  */
1373 /* Name         - add_stackParm                                     */
1374 /*                                                                  */
1375 /* Function     - Determine code and stack size incremements for a  */
1376 /*                parameter.                                        */
1377 /*                                                                  */
1378 /*------------------------------------------------------------------*/
1379
1380 static void inline
1381 add_stackParm (guint *gr, size_data *sz, ArgInfo *ainfo, gint size)
1382 {
1383         if (*gr > S390_LAST_ARG_REG) {
1384                 sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1385                 ainfo->reg          = STK_BASE;
1386                 ainfo->offset   = sz->stack_size;
1387                 ainfo->regtype  = RegTypeStructByAddrOnStack;
1388                 sz->stack_size += sizeof (gpointer);
1389                 sz->parm_size  += sizeof(gpointer);
1390                 sz->offStruct  += sizeof(gpointer);
1391         } else {
1392                 ainfo->reg      = *gr;
1393                 ainfo->offset   = sz->stack_size;
1394                 ainfo->regtype  = RegTypeStructByAddr;
1395         }
1396         (*gr) ++;
1397         ainfo->offparm  = sz->offset;
1398         sz->offset      = S390_ALIGN(sz->offset+size, sizeof(long));
1399         ainfo->size     = size;
1400         ainfo->vtsize   = size;
1401         sz->parm_size  += size;
1402 }
1403
1404 /*========================= End of Function ========================*/
1405
1406 /*------------------------------------------------------------------*/
1407 /*                                                                  */
1408 /* Name         - add_float                                         */
1409 /*                                                                  */
1410 /* Function     - Determine code and stack size incremements for a  */
1411 /*                float parameter.                                  */
1412 /*                                                                  */
1413 /*------------------------------------------------------------------*/
1414
1415 static void inline
1416 add_float (guint *fr,  size_data *sz, ArgInfo *ainfo)
1417 {
1418         if ((*fr) <= S390_LAST_FPARG_REG) {
1419                 ainfo->regtype = RegTypeFP;
1420                 ainfo->reg     = *fr;
1421                 sz->code_size += 4;
1422                 (*fr) += 2;
1423         }
1424         else {
1425                 ainfo->offset   = sz->stack_size;
1426                 ainfo->reg      = STK_BASE;
1427                 ainfo->regtype  = RegTypeBase;
1428                 sz->code_size  += 4;
1429                 sz->stack_size += sizeof(double);
1430                 sz->local_size += sizeof(double);
1431                 sz->offStruct  += sizeof(double);
1432         }
1433 }
1434
1435 /*========================= End of Function ========================*/
1436
1437 /*------------------------------------------------------------------*/
1438 /*                                                                  */
1439 /* Name         - get_call_info                                     */
1440 /*                                                                  */
1441 /* Function     - Determine the amount of space required for code   */
1442 /*                and stack. In addition determine starting points  */
1443 /*                for stack-based parameters, and area for struct-  */
1444 /*                ures being returned on the stack.                 */
1445 /*                                                                  */
1446 /*------------------------------------------------------------------*/
1447
1448 static CallInfo *
1449 get_call_info (MonoCompile *cfg, MonoMemPool *mp, MonoMethodSignature *sig, gboolean is_pinvoke)
1450 {
1451         guint i, fr, gr, size;
1452         int nParm = sig->hasthis + sig->param_count;
1453         MonoType *ret_type;
1454         guint32 simpletype, align;
1455         CallInfo *cinfo;
1456         size_data *sz;
1457         MonoGenericSharingContext *gsctx = cfg ? cfg->generic_sharing_context : NULL;
1458
1459         if (mp)
1460                 cinfo = mono_mempool_alloc0 (mp, sizeof (CallInfo) + sizeof (ArgInfo) * nParm);
1461         else
1462                 cinfo = g_malloc0 (sizeof (CallInfo) + sizeof (ArgInfo) * nParm);
1463
1464         fr                = 0;
1465         gr                = s390_r2;
1466         nParm             = 0;
1467         cinfo->struct_ret = 0;
1468         sz                = &cinfo->sz;
1469         sz->retStruct     = 0;
1470         sz->offset        = 0;
1471         sz->offStruct     = S390_MINIMAL_STACK_SIZE;
1472         sz->stack_size    = S390_MINIMAL_STACK_SIZE;
1473         sz->code_size     = 0;
1474         sz->parm_size     = 0;
1475         sz->local_size    = 0;
1476
1477         /*----------------------------------------------------------*/
1478         /* We determine the size of the return code/stack in case we*/
1479         /* need to reserve a register to be used to address a stack */
1480         /* area that the callee will use.                           */
1481         /*----------------------------------------------------------*/
1482
1483         ret_type = mono_type_get_underlying_type (sig->ret);
1484         ret_type = mini_get_basic_type_from_generic (gsctx, ret_type);
1485         simpletype = ret_type->type;
1486 enum_retvalue:
1487         switch (simpletype) {
1488                 case MONO_TYPE_BOOLEAN:
1489                 case MONO_TYPE_I1:
1490                 case MONO_TYPE_U1:
1491                 case MONO_TYPE_I2:
1492                 case MONO_TYPE_U2:
1493                 case MONO_TYPE_CHAR:
1494                 case MONO_TYPE_I4:
1495                 case MONO_TYPE_U4:
1496                 case MONO_TYPE_I:
1497                 case MONO_TYPE_U:
1498                 case MONO_TYPE_CLASS:
1499                 case MONO_TYPE_OBJECT:
1500                 case MONO_TYPE_SZARRAY:
1501                 case MONO_TYPE_ARRAY:
1502                 case MONO_TYPE_PTR:
1503                 case MONO_TYPE_FNPTR:
1504                 case MONO_TYPE_STRING:
1505                         cinfo->ret.reg = s390_r2;
1506                         sz->code_size += 4;
1507                         break;
1508                 case MONO_TYPE_R4:
1509                 case MONO_TYPE_R8:
1510                         cinfo->ret.reg = s390_f0;
1511                         sz->code_size += 4;
1512                         break;
1513                 case MONO_TYPE_I8:
1514                 case MONO_TYPE_U8:
1515                         cinfo->ret.reg = s390_r2;
1516                         sz->code_size += 4;
1517                         break;
1518                 case MONO_TYPE_GENERICINST:
1519                         if (!mono_type_generic_inst_is_valuetype (sig->ret)) {
1520                                 cinfo->ret.reg = s390_r2;
1521                                 sz->code_size += 4;
1522                                 break;
1523                         }
1524                         /* Fall through */
1525                 case MONO_TYPE_VALUETYPE: {
1526                         MonoClass *klass = mono_class_from_mono_type (sig->ret);
1527                         if (klass->enumtype) {
1528                                 simpletype = mono_class_enum_basetype (klass)->type;
1529                                 goto enum_retvalue;
1530                         }
1531                         if (sig->pinvoke)
1532                                 size = mono_class_native_size (klass, &align);
1533                         else
1534                                 size = mono_class_value_size (klass, &align);
1535
1536                         cinfo->ret.reg    = s390_r2;
1537                         cinfo->struct_ret = 1;
1538                         cinfo->ret.size   = size;
1539                         cinfo->ret.vtsize = size;
1540                         gr++;
1541                         break;
1542                 }
1543                 case MONO_TYPE_TYPEDBYREF:
1544                         size = sizeof (MonoTypedRef);
1545                         cinfo->ret.reg    = s390_r2;
1546                         cinfo->struct_ret = 1;
1547                         cinfo->ret.size   = size;
1548                         cinfo->ret.vtsize = size;
1549                         gr++;
1550                         break;
1551                 case MONO_TYPE_VOID:
1552                         break;
1553                 default:
1554                         g_error ("Can't handle as return value 0x%x", sig->ret->type);
1555         }
1556
1557         if (sig->hasthis) {
1558                 cinfo->args[nParm].size = sizeof(gpointer);
1559                 add_general (&gr, sz, cinfo->args+nParm);
1560                 nParm++;
1561         }
1562
1563         if ((sig->call_convention == MONO_CALL_VARARG) && (sig->param_count == 0)) {
1564                 gr = S390_LAST_ARG_REG + 1;
1565
1566                 /* Emit the signature cookie just before the implicit arguments */
1567                 add_general (&gr, sz, &cinfo->sigCookie);
1568         }
1569
1570         /*----------------------------------------------------------*/
1571         /* We determine the size of the parameter code and stack    */
1572         /* requirements by checking the types and sizes of the      */
1573         /* parameters.                                              */
1574         /*----------------------------------------------------------*/
1575
1576         for (i = 0; i < sig->param_count; ++i) {
1577                 MonoType *ptype;
1578
1579                 /*--------------------------------------------------*/
1580                 /* Handle vararg type calls. All args are put on    */
1581                 /* the stack.                                       */
1582                 /*--------------------------------------------------*/
1583                 if ((sig->call_convention == MONO_CALL_VARARG) &&
1584                     (i == sig->sentinelpos)) {
1585                         gr = S390_LAST_ARG_REG + 1;
1586                         add_general (&gr, sz, &cinfo->sigCookie);
1587                 }
1588
1589                 if (sig->params [i]->byref) {
1590                         add_general (&gr, sz, cinfo->args+nParm);
1591                         cinfo->args[nParm].size = sizeof(gpointer);
1592                         nParm++;
1593                         continue;
1594                 }
1595
1596                 ptype = mono_type_get_underlying_type (sig->params [i]);
1597                 ptype = mini_get_basic_type_from_generic (gsctx, ptype);
1598                 simpletype = ptype->type;
1599                 cinfo->args[nParm].type = simpletype;
1600                 switch (simpletype) {
1601                 case MONO_TYPE_BOOLEAN:
1602                 case MONO_TYPE_I1:
1603                 case MONO_TYPE_U1:
1604                         cinfo->args[nParm].size = sizeof(char);
1605                         add_general (&gr, sz, cinfo->args+nParm);
1606                         nParm++;
1607                         break;
1608                 case MONO_TYPE_I2:
1609                 case MONO_TYPE_U2:
1610                 case MONO_TYPE_CHAR:
1611                         cinfo->args[nParm].size = sizeof(short);
1612                         add_general (&gr, sz, cinfo->args+nParm);
1613                         nParm++;
1614                         break;
1615                 case MONO_TYPE_I4:
1616                 case MONO_TYPE_U4:
1617                         cinfo->args[nParm].size = sizeof(int);
1618                         add_general (&gr, sz, cinfo->args+nParm);
1619                         nParm++;
1620                         break;
1621                 case MONO_TYPE_I:
1622                 case MONO_TYPE_U:
1623                 case MONO_TYPE_PTR:
1624                 case MONO_TYPE_FNPTR:
1625                 case MONO_TYPE_CLASS:
1626                 case MONO_TYPE_OBJECT:
1627                 case MONO_TYPE_STRING:
1628                 case MONO_TYPE_SZARRAY:
1629                 case MONO_TYPE_ARRAY:
1630                         cinfo->args[nParm].size = sizeof(gpointer);
1631                         add_general (&gr, sz, cinfo->args+nParm);
1632                         nParm++;
1633                         break;
1634                 case MONO_TYPE_I8:
1635                 case MONO_TYPE_U8:
1636                         cinfo->args[nParm].size = sizeof(long long);
1637                         add_general (&gr, sz, cinfo->args+nParm);
1638                         nParm++;
1639                         break;
1640                 case MONO_TYPE_R4:
1641                         cinfo->args[nParm].size = sizeof(float);
1642                         add_float (&fr, sz, cinfo->args+nParm);
1643                         nParm++;
1644                         break;
1645                 case MONO_TYPE_R8:
1646                         cinfo->args[nParm].size = sizeof(double);
1647                         add_float (&fr, sz, cinfo->args+nParm);
1648                         nParm++;
1649                         break;
1650                 case MONO_TYPE_GENERICINST:
1651                         if (!mono_type_generic_inst_is_valuetype (sig->params [i])) {
1652                                 cinfo->args[nParm].size = sizeof(gpointer);
1653                                 add_general (&gr, sz, cinfo->args+nParm);
1654                                 nParm++;
1655                                 break;
1656                         }
1657                         /* Fall through */
1658                 case MONO_TYPE_VALUETYPE: {
1659                         MonoMarshalType *info;
1660                         MonoClass *klass = mono_class_from_mono_type (sig->params [i]);
1661                         if (sig->pinvoke)
1662                                 size = mono_class_native_size (klass, &align);
1663                         else
1664                                 size = mono_class_value_size (klass, &align);
1665
1666                         info = mono_marshal_load_type_info (klass);
1667
1668                         if ((info->native_size == sizeof(float)) &&
1669                             (info->num_fields  == 1) &&
1670                             (info->fields[0].field->type->type == MONO_TYPE_R4)) {
1671                                 cinfo->args[nParm].size = sizeof(float);
1672                                 add_float(&fr, sz, cinfo->args+nParm);
1673                                 nParm ++;
1674                                 break;
1675                         }
1676
1677                         if ((info->native_size == sizeof(double)) &&
1678                             (info->num_fields  == 1) &&
1679                             (info->fields[0].field->type->type == MONO_TYPE_R8)) {
1680                                 cinfo->args[nParm].size = sizeof(double);
1681                                 add_float(&fr, sz, cinfo->args+nParm);
1682                                 nParm ++;
1683                                 break;
1684                         }
1685
1686                         cinfo->args[nParm].vtsize  = 0;
1687                         cinfo->args[nParm].size    = 0;
1688
1689                         switch (size) {
1690                                 /*----------------------------------*/
1691                                 /* On S/390, structures of size 1,  */
1692                                 /* 2, 4, and 8 bytes are passed in  */
1693                                 /* (a) register(s).                 */
1694                                 /*----------------------------------*/
1695                                 case 0:
1696                                 case 1:
1697                                 case 2:
1698                                 case 4:
1699                                 case 8:
1700                                         add_general(&gr, sz, cinfo->args+nParm);
1701                                         cinfo->args[nParm].size    = size;
1702                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1703                                         nParm++;
1704                                         sz->local_size            += sizeof(long);
1705                                         break;
1706                                 default:
1707                                         add_stackParm(&gr, sz, cinfo->args+nParm, size);
1708                                         nParm++;
1709                         }
1710                 }
1711                         break;
1712                 case MONO_TYPE_TYPEDBYREF: {
1713                         int size = sizeof (MonoTypedRef);
1714
1715                         cinfo->args[nParm].vtsize  = 0;
1716                         cinfo->args[nParm].size    = 0;
1717
1718                         switch (size) {
1719                                 /*----------------------------------*/
1720                                 /* On S/390, structures of size 1,  */
1721                                 /* 2, 4, and 8 bytes are passed in  */
1722                                 /* (a) register(s).                 */
1723                                 /*----------------------------------*/
1724                                 case 0:
1725                                 case 1:
1726                                 case 2:
1727                                 case 4:
1728                                 case 8:
1729                                         add_general(&gr, sz, cinfo->args+nParm);
1730                                         cinfo->args[nParm].size    = size;
1731                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1732                                         nParm++;
1733                                         sz->local_size            += sizeof(long);
1734                                         break;
1735                                 default:
1736                                         add_stackParm(&gr, sz, cinfo->args+nParm, size);
1737                                         nParm++;
1738                         }
1739                 }
1740                         break;
1741                 default:
1742                         g_error ("Can't trampoline 0x%x", sig->params [i]->type);
1743                 }
1744         }
1745
1746         /*----------------------------------------------------------*/
1747         /* Handle the case where there are no implicit arguments    */
1748         /*----------------------------------------------------------*/
1749         if ((sig->call_convention == MONO_CALL_VARARG) &&
1750             (nParm > 0) &&
1751             (!sig->pinvoke) &&
1752             (sig->param_count == sig->sentinelpos)) {
1753                 gr = S390_LAST_ARG_REG + 1;
1754                 add_general (&gr, sz, &cinfo->sigCookie);
1755         }
1756
1757         /*----------------------------------------------------------*/
1758         /* If we are passing a structure back then if it won't be   */
1759         /* in a register(s) then we make room at the end of the     */
1760         /* parameters that may have been placed on the stack        */
1761         /*----------------------------------------------------------*/
1762         if (cinfo->struct_ret) {
1763                 cinfo->ret.offset = sz->stack_size;
1764                 switch (cinfo->ret.size) {
1765                 case 0:
1766                 case 1:
1767                 case 2:
1768                 case 4:
1769                 case 8:
1770                         break;
1771                 default:
1772                         sz->stack_size   += S390_ALIGN(cinfo->ret.size, align);
1773                 }
1774         }
1775
1776         cinfo->lastgr   = gr;
1777         sz->stack_size  = sz->stack_size + sz->local_size + sz->parm_size +
1778                           sz->offset;
1779         sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1780
1781         return (cinfo);
1782 }
1783
1784 /*========================= End of Function ========================*/
1785
1786 /*------------------------------------------------------------------*/
1787 /*                                                                  */
1788 /* Name         - mono_arch_allocate_vars                           */
1789 /*                                                                  */
1790 /* Function     - Set var information according to the calling      */
1791 /*                convention for S/390. The local var stuff should  */
1792 /*                most likely be split in another method.           */
1793 /*                                                                  */
1794 /* Parameter    - @m - Compile unit.                                */
1795 /*                                                                  */
1796 /*------------------------------------------------------------------*/
1797
1798 void
1799 mono_arch_allocate_vars (MonoCompile *cfg)
1800 {
1801         MonoMethodSignature *sig;
1802         MonoMethodHeader *header;
1803         MonoInst *inst;
1804         CallInfo *cinfo;
1805         int iParm, iVar, offset, align, size, curinst;
1806         int frame_reg = STK_BASE;
1807         int sArg, eArg;
1808
1809         header  = cfg->header;
1810
1811         cfg->flags |= MONO_CFG_HAS_SPILLUP;
1812
1813         /*---------------------------------------------------------*/
1814         /* We use the frame register also for any method that has  */
1815         /* filter clauses. This way, when the handlers are called, */
1816         /* the code will reference local variables using the frame */
1817         /* reg instead of the stack pointer: if we had to restore  */
1818         /* the stack pointer, we'd corrupt the method frames that  */
1819         /* are already on the stack (since filters get called      */
1820         /* before stack unwinding happens) when the filter code    */
1821         /* would call any method.                                  */
1822         /*---------------------------------------------------------*/
1823         if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
1824                 frame_reg = s390_r11;
1825
1826         cfg->frame_reg = frame_reg;
1827
1828         cfg->arch.bkchain_reg = -1;
1829
1830         if (frame_reg != STK_BASE)
1831                 cfg->used_int_regs |= 1 << frame_reg;
1832
1833         sig     = mono_method_signature (cfg->method);
1834
1835         cinfo   = get_call_info (cfg, cfg->mempool, sig, sig->pinvoke);
1836
1837         if (!cinfo->struct_ret) {
1838                 switch (mono_type_get_underlying_type (sig->ret)->type) {
1839                 case MONO_TYPE_VOID:
1840                         break;
1841                 default:
1842                         cfg->ret->opcode = OP_REGVAR;
1843                         cfg->ret->dreg   = s390_r2;
1844                         break;
1845                 }
1846         }
1847
1848         /*--------------------------------------------------------------*/
1849         /* local vars are at a positive offset from the stack pointer   */
1850         /* also note that if the function uses alloca, we use s390_r11  */
1851         /* to point at the local variables.                             */
1852         /* add parameter area size for called functions                 */
1853         /*--------------------------------------------------------------*/
1854         if (cfg->param_area == 0)
1855                 offset = S390_MINIMAL_STACK_SIZE;
1856         else
1857                 offset = cfg->param_area;
1858
1859         cfg->sig_cookie = 0;
1860
1861         if (cinfo->struct_ret) {
1862                 inst               = cfg->vret_addr;
1863                 offset             = S390_ALIGN(offset, sizeof(gpointer));
1864                 inst->inst_offset  = offset;
1865                 inst->opcode       = OP_REGOFFSET;
1866                 inst->inst_basereg = frame_reg;
1867                 offset            += sizeof(gpointer);
1868                 if (G_UNLIKELY (cfg->verbose_level > 1)) {
1869                         printf ("vret_addr =");
1870                         mono_print_ins (cfg->vret_addr);
1871                 }
1872         }
1873
1874         if (sig->hasthis) {
1875                 inst = cfg->args [0];
1876                 if (inst->opcode != OP_REGVAR) {
1877                         inst->opcode       = OP_REGOFFSET;
1878                         inst->inst_basereg = frame_reg;
1879                         offset             = S390_ALIGN(offset, sizeof(gpointer));
1880                         inst->inst_offset  = offset;
1881                         offset            += sizeof (gpointer);
1882                 }
1883                 curinst = sArg = 1;
1884         } else {
1885                 curinst = sArg = 0;
1886         }
1887
1888         eArg = sig->param_count + sArg;
1889
1890         if (sig->call_convention == MONO_CALL_VARARG)
1891                 cfg->sig_cookie += S390_MINIMAL_STACK_SIZE;
1892
1893         for (iParm = sArg; iParm < eArg; ++iParm) {
1894                 inst = cfg->args [curinst];
1895                 if (inst->opcode != OP_REGVAR) {
1896                         switch (cinfo->args[iParm].regtype) {
1897                         case RegTypeStructByAddr : {
1898                                 MonoInst *indir;
1899
1900                                 size = sizeof (gpointer);
1901
1902                                 inst->opcode = OP_REGOFFSET;
1903                                 inst->inst_basereg = frame_reg;
1904                                 offset = S390_ALIGN (offset, sizeof (gpointer));
1905                                 inst->inst_offset = offset;
1906
1907                                 /* Add a level of indirection */
1908                                 MONO_INST_NEW (cfg, indir, 0);
1909                                 *indir = *inst;
1910                                 inst->opcode = OP_VTARG_ADDR;
1911                                 inst->inst_left = indir;
1912                         }
1913                                 break;
1914                         case RegTypeStructByAddrOnStack : {
1915                                 MonoInst *indir;
1916
1917                                 size = sizeof (gpointer);
1918
1919                                 /* Similar to the == STK_BASE case below */
1920                                 cfg->arch.bkchain_reg = s390_r12;
1921                                 cfg->used_int_regs |= 1 << cfg->arch.bkchain_reg;
1922
1923                                 inst->opcode = OP_REGOFFSET;
1924                                 inst->dreg = mono_alloc_preg (cfg);
1925                                 inst->inst_basereg = cfg->arch.bkchain_reg;
1926                                 inst->inst_offset = cinfo->args [iParm].offset;
1927
1928                                 /* Add a level of indirection */
1929                                 MONO_INST_NEW (cfg, indir, 0);
1930                                 *indir = *inst;
1931                                 inst->opcode = OP_VTARG_ADDR;
1932                                 inst->inst_left = indir;
1933                                 break;
1934                         }
1935                         case RegTypeStructByVal :
1936                                 size               = cinfo->args[iParm].size;
1937                                 offset             = S390_ALIGN(offset, size);
1938                                 inst->opcode = OP_REGOFFSET;
1939                                 inst->inst_basereg = frame_reg;
1940                                 inst->inst_offset = offset;
1941                                 break;
1942                         default :
1943                                 if (cinfo->args [iParm].reg == STK_BASE) {
1944                                         /*
1945                                          * These arguments are in the previous frame, so we can't
1946                                          * compute their offset from the current frame pointer right
1947                                          * now, since cfg->stack_offset is not yet known, so dedicate a
1948                                          * register holding the previous frame pointer.
1949                                          */
1950                                         cfg->arch.bkchain_reg = s390_r12;
1951                                         cfg->used_int_regs |= 1 << cfg->arch.bkchain_reg;
1952
1953                                         inst->opcode       = OP_REGOFFSET;
1954                                         inst->inst_basereg = cfg->arch.bkchain_reg;
1955                                         size               = (cinfo->args[iParm].size < 8
1956                                                                           ? 8 - cinfo->args[iParm].size
1957                                                                           : 0);
1958                                         inst->inst_offset  = cinfo->args [iParm].offset + size;
1959                                         size = sizeof (long);
1960                                 } else {
1961                                         inst->opcode       = OP_REGOFFSET;
1962                                         inst->inst_basereg = frame_reg;
1963                                         size               = (cinfo->args[iParm].size < 8
1964                                                                           ? sizeof(int)
1965                                                                           : sizeof(long));
1966                                         offset             = S390_ALIGN(offset, size);
1967                                         inst->inst_offset  = offset;
1968                                 }
1969                                 break;
1970                         }
1971                         if ((sig->call_convention == MONO_CALL_VARARG) &&
1972                             (cinfo->args[iParm].regtype != RegTypeGeneral) &&
1973                             (iParm < sig->sentinelpos))
1974                                 cfg->sig_cookie += size;
1975
1976                         offset += size;
1977                 }
1978                 curinst++;
1979         }
1980
1981         curinst = cfg->locals_start;
1982         for (iVar = curinst; iVar < cfg->num_varinfo; ++iVar) {
1983                 inst = cfg->varinfo [iVar];
1984                 if ((inst->flags & MONO_INST_IS_DEAD) ||
1985                     (inst->opcode == OP_REGVAR))
1986                         continue;
1987
1988                 /*--------------------------------------------------*/
1989                 /* inst->backend.is_pinvoke indicates native sized  */
1990                 /* value typs this is used by the pinvoke wrappers  */
1991                 /* when they call functions returning structure     */
1992                 /*--------------------------------------------------*/
1993                 if (inst->backend.is_pinvoke && MONO_TYPE_ISSTRUCT (inst->inst_vtype))
1994                         size = mono_class_native_size (mono_class_from_mono_type(inst->inst_vtype),
1995                                                        (guint32 *) &align);
1996                 else
1997                         size = mono_type_size (inst->inst_vtype, &align);
1998
1999                 offset             = S390_ALIGN(offset, align);
2000                 inst->inst_offset  = offset;
2001                 inst->opcode       = OP_REGOFFSET;
2002                 inst->inst_basereg = frame_reg;
2003                 offset            += size;
2004                 DEBUG (g_print("allocating local %d to %ld, size: %d\n",
2005                                 iVar, inst->inst_offset, size));
2006         }
2007
2008         /*------------------------------------------------------*/
2009         /* Allow space for the trace method stack area if needed*/
2010         /*------------------------------------------------------*/
2011         if (mono_jit_trace_calls != NULL && mono_trace_eval (cfg->method))
2012                 offset += S390_TRACE_STACK_SIZE;
2013
2014         /*------------------------------------------------------*/
2015         /* Reserve space to save LMF and caller saved registers */
2016         /*------------------------------------------------------*/
2017         if (cfg->method->save_lmf)
2018                 offset += sizeof (MonoLMF);
2019
2020         /*------------------------------------------------------*/
2021         /* align the offset                                     */
2022         /*------------------------------------------------------*/
2023         cfg->stack_offset = S390_ALIGN(offset, S390_STACK_ALIGNMENT);
2024
2025         /*------------------------------------------------------*/
2026         /* Fix offsets for args whose value is in parent frame  */
2027         /*------------------------------------------------------*/
2028         for (iParm = sArg; iParm < eArg; ++iParm) {
2029                 inst = cfg->args [iParm];
2030
2031                 if (inst->opcode == OP_S390_STKARG) {
2032                         inst->opcode = OP_REGOFFSET;
2033                         inst->inst_offset += cfg->stack_offset;
2034                 }
2035         }
2036 }
2037
2038 /*========================= End of Function ========================*/
2039
2040 /*------------------------------------------------------------------*/
2041 /*                                                                  */
2042 /* Name         - mono_arch_create_vars                             */
2043 /*                                                                  */
2044 /*------------------------------------------------------------------*/
2045
2046 void
2047 mono_arch_create_vars (MonoCompile *cfg)
2048 {
2049         MonoMethodSignature *sig;
2050         CallInfo *cinfo;
2051
2052         sig = mono_method_signature (cfg->method);
2053
2054         cinfo = get_call_info (cfg, cfg->mempool, sig, sig->pinvoke);
2055
2056         if (cinfo->struct_ret) {
2057                 cfg->vret_addr = mono_compile_create_var (cfg, &mono_defaults.int_class->byval_arg, OP_ARG);
2058                 if (G_UNLIKELY (cfg->verbose_level > 1)) {
2059                         printf ("vret_addr = ");
2060                         mono_print_ins (cfg->vret_addr);
2061                 }
2062         }
2063 }
2064
2065 /*========================= End of Function ========================*/
2066
2067 /*------------------------------------------------------------------*/
2068 /*                                                                  */
2069 /* Name         - add_outarg_reg2.                                  */
2070 /*                                                                  */
2071 /*------------------------------------------------------------------*/
2072
2073 static void
2074 add_outarg_reg2 (MonoCompile *cfg, MonoCallInst *call, ArgStorage storage, int reg, MonoInst *tree)
2075 {
2076         MonoInst *ins;
2077
2078         switch (storage) {
2079         case RegTypeGeneral:
2080                 MONO_INST_NEW (cfg, ins, OP_MOVE);
2081                 ins->dreg = mono_alloc_ireg (cfg);
2082                 ins->sreg1 = tree->dreg;
2083                 MONO_ADD_INS (cfg->cbb, ins);
2084                 mono_call_inst_add_outarg_reg (cfg, call, ins->dreg, reg, FALSE);
2085                 break;
2086         case RegTypeFP:
2087                 MONO_INST_NEW (cfg, ins, OP_FMOVE);
2088                 ins->dreg = mono_alloc_freg (cfg);
2089                 ins->sreg1 = tree->dreg;
2090                 MONO_ADD_INS (cfg->cbb, ins);
2091                 mono_call_inst_add_outarg_reg (cfg, call, ins->dreg, reg, TRUE);
2092                 break;
2093         case RegTypeFPR4:
2094                 MONO_INST_NEW (cfg, ins, OP_S390_SETF4RET);
2095                 ins->dreg = mono_alloc_freg (cfg);
2096                 ins->sreg1 = tree->dreg;
2097                 MONO_ADD_INS (cfg->cbb, ins);
2098                 mono_call_inst_add_outarg_reg (cfg, call, ins->dreg, reg, TRUE);
2099                 break;
2100         default:
2101                 g_assert_not_reached ();
2102         }
2103 }
2104
2105 /*========================= End of Function ========================*/
2106
2107 /*------------------------------------------------------------------*/
2108 /*                                                                  */
2109 /* Name         - emit_sig_cookie.                                  */
2110 /*                                                                  */
2111 /*------------------------------------------------------------------*/
2112
2113 static void
2114 emit_sig_cookie (MonoCompile *cfg, MonoCallInst *call, CallInfo *cinfo)
2115 {
2116         MonoMethodSignature *tmpSig;
2117         MonoInst *sig_arg;
2118
2119         cfg->disable_aot = TRUE;
2120
2121         /*----------------------------------------------------------*/
2122         /* mono_ArgIterator_Setup assumes the signature cookie is   */
2123         /* passed first and all the arguments which were before it  */
2124         /* passed on the stack after the signature. So compensate   */
2125         /* by passing a different signature.                        */
2126         /*----------------------------------------------------------*/
2127         tmpSig = mono_metadata_signature_dup (call->signature);
2128         tmpSig->param_count -= call->signature->sentinelpos;
2129         tmpSig->sentinelpos  = 0;
2130         if (tmpSig->param_count > 0)
2131                 memcpy (tmpSig->params,
2132                         call->signature->params + call->signature->sentinelpos,
2133                         tmpSig->param_count * sizeof(MonoType *));
2134
2135         MONO_INST_NEW (cfg, sig_arg, OP_ICONST);
2136         sig_arg->dreg = mono_alloc_ireg (cfg);
2137         sig_arg->inst_p0 = tmpSig;
2138         MONO_ADD_INS (cfg->cbb, sig_arg);
2139
2140         MONO_EMIT_NEW_STORE_MEMBASE (cfg, OP_STORE_MEMBASE_REG, STK_BASE,
2141                                      cinfo->sigCookie.offset, sig_arg->dreg);
2142 }
2143
2144 /*========================= End of Function ========================*/
2145
2146 /*------------------------------------------------------------------*/
2147 /*                                                                  */
2148 /* Name         - mono_arch_emit_call                               */
2149 /*                                                                  */
2150 /*------------------------------------------------------------------*/
2151
2152 void
2153 mono_arch_emit_call (MonoCompile *cfg, MonoCallInst *call)
2154 {
2155         MonoInst *in;
2156         MonoMethodSignature *sig;
2157         MonoInst *ins;
2158         int i, n, lParamArea;
2159         CallInfo *cinfo;
2160         ArgInfo *ainfo = NULL;
2161         int stackSize;
2162         MonoMethodHeader *header;
2163         int frmReg;
2164
2165         sig = call->signature;
2166         n = sig->param_count + sig->hasthis;
2167         DEBUG (g_print ("Call requires: %d parameters\n",n));
2168
2169         cinfo = get_call_info (cfg, cfg->mempool, sig, sig->pinvoke);
2170
2171         stackSize         = cinfo->sz.stack_size + cinfo->sz.local_size +
2172                             cinfo->sz.parm_size + cinfo->sz.offset;
2173         call->stack_usage = MAX(stackSize, call->stack_usage);
2174         lParamArea        = MAX((call->stack_usage-S390_MINIMAL_STACK_SIZE-cinfo->sz.parm_size), 0);
2175         cfg->param_area   = MAX(((signed) cfg->param_area), lParamArea);
2176         cfg->flags       |= MONO_CFG_HAS_CALLS;
2177
2178         if (cinfo->struct_ret) {
2179                 MONO_INST_NEW (cfg, ins, OP_MOVE);
2180                 ins->sreg1 = call->vret_var->dreg;
2181                 ins->dreg = mono_alloc_preg (cfg);
2182                 MONO_ADD_INS (cfg->cbb, ins);
2183                 mono_call_inst_add_outarg_reg (cfg, call, ins->dreg, cinfo->ret.reg, FALSE);
2184         }
2185
2186         header = cfg->header;
2187         if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
2188                 frmReg = s390_r11;
2189         else
2190                 frmReg = STK_BASE;
2191
2192         for (i = 0; i < n; ++i) {
2193                 MonoType *t;
2194
2195                 ainfo = cinfo->args + i;
2196                 if (i >= sig->hasthis)
2197                         t = sig->params [i - sig->hasthis];
2198                 else
2199                         t = &mono_defaults.int_class->byval_arg;
2200                 t = mono_type_get_underlying_type (t);
2201
2202                 in = call->args [i];
2203
2204                 if ((sig->call_convention == MONO_CALL_VARARG) &&
2205                     (!sig->pinvoke) &&
2206                     (i == sig->sentinelpos)) {
2207                         emit_sig_cookie (cfg, call, cinfo);
2208                 }
2209
2210                 switch (ainfo->regtype) {
2211                 case RegTypeGeneral:
2212                         add_outarg_reg2 (cfg, call, ainfo->regtype, ainfo->reg, in);
2213                         break;
2214                 case RegTypeFP:
2215                         if (MONO_TYPE_ISSTRUCT (t)) {
2216                                 /* Valuetype passed in one fp register */
2217                                 ainfo->regtype = RegTypeStructByValInFP;
2218                                 /* Fall through */
2219                         } else {
2220                                 if (ainfo->size == 4)
2221                                         ainfo->regtype = RegTypeFPR4;
2222                                 add_outarg_reg2 (cfg, call, ainfo->regtype, ainfo->reg, in);
2223                                 break;
2224                         }
2225                 case RegTypeStructByVal:
2226                 case RegTypeStructByAddr:
2227                 case RegTypeStructByAddrOnStack: {
2228                         guint32 align;
2229                         guint32 size;
2230
2231                         if (sig->params [i - sig->hasthis]->type == MONO_TYPE_TYPEDBYREF) {
2232                                 size = sizeof (MonoTypedRef);
2233                                 align = sizeof (gpointer);
2234                         }
2235                         else
2236                                 if (sig->pinvoke)
2237                                         size = mono_type_native_stack_size (&in->klass->byval_arg, &align);
2238                                 else {
2239                                         /*
2240                                          * Other backends use mono_type_stack_size (), but that
2241                                          * aligns the size to 8, which is larger than the size of
2242                                          * the source, leading to reads of invalid memory if the
2243                                          * source is at the end of address space.
2244                                          */
2245                                         size = mono_class_value_size (in->klass, &align);
2246                                 }
2247
2248                         g_assert (in->klass);
2249
2250                         ainfo->offparm += cinfo->sz.offStruct;
2251
2252                         MONO_INST_NEW (cfg, ins, OP_OUTARG_VT);
2253                         ins->sreg1 = in->dreg;
2254                         ins->klass = in->klass;
2255                         ins->backend.size = ainfo->size;
2256                         ins->inst_p0 = call;
2257                         ins->inst_p1 = mono_mempool_alloc (cfg->mempool, sizeof (ArgInfo));
2258                         memcpy (ins->inst_p1, ainfo, sizeof (ArgInfo));
2259
2260                         MONO_ADD_INS (cfg->cbb, ins);
2261
2262                         if (ainfo->regtype == RegTypeStructByAddr) {
2263                                 /*
2264                                  * We use OP_OUTARG_VT to copy the valuetype to a stack location, then
2265                                  * use the normal OUTARG opcodes to pass the address of the location to
2266                                  * the callee.
2267                                  */
2268                                 int treg = mono_alloc_preg (cfg);
2269                                 MONO_EMIT_NEW_BIALU_IMM (cfg, OP_ADD_IMM, treg,
2270                                                          frmReg, ainfo->offparm);
2271                                 mono_call_inst_add_outarg_reg (cfg, call, treg, ainfo->reg, FALSE);
2272                         } else if (ainfo->regtype == RegTypeStructByAddrOnStack) {
2273                                 /* The address of the valuetype is passed on the stack */
2274                                 int treg = mono_alloc_preg (cfg);
2275                                 MONO_EMIT_NEW_BIALU_IMM (cfg, OP_ADD_IMM, treg,
2276                                                          frmReg, ainfo->offparm);
2277                                 MONO_EMIT_NEW_STORE_MEMBASE (cfg, OP_STORE_MEMBASE_REG,
2278                                                              ainfo->reg, ainfo->offset, treg);
2279                         }
2280                         break;
2281                 }
2282                 case RegTypeBase:
2283                         if (!t->byref && t->type == MONO_TYPE_R4) {
2284                                 MONO_EMIT_NEW_STORE_MEMBASE (cfg, OP_STORER4_MEMBASE_REG,
2285                                                              STK_BASE, ainfo->offset + 4,
2286                                                              in->dreg);
2287                         } else if (!t->byref && (t->type == MONO_TYPE_R8)) {
2288                                 MONO_EMIT_NEW_STORE_MEMBASE (cfg, OP_STORER8_MEMBASE_REG,
2289                                                              STK_BASE, ainfo->offset,
2290                                                              in->dreg);
2291                         } else {
2292                                 MONO_INST_NEW (cfg, ins, OP_STORE_MEMBASE_REG);
2293                                 ins->inst_destbasereg = STK_BASE;
2294                                 ins->inst_offset = ainfo->offset;
2295                                 ins->sreg1 = in->dreg;
2296
2297 #if 0
2298                                 /* This is needed by MonoTypedRef->value to point to the correct data */
2299                                 if ((sig->call_convention == MONO_CALL_VARARG) &&
2300                                         (i >= sig->sentinelpos)) {
2301                                         switch (ainfo->size) {
2302                                         case 1:
2303                                                 ins->opcode = OP_STOREI1_MEMBASE_REG;
2304                                                 break;
2305                                         case 2:
2306                                                 ins->opcode = OP_STOREI2_MEMBASE_REG;
2307                                                 break;
2308                                         case 4:
2309                                                 ins->opcode = OP_STOREI4_MEMBASE_REG;
2310                                                 break;
2311                                         default:
2312                                                 break;
2313                                         }
2314                                 }
2315 #endif
2316
2317                                 MONO_ADD_INS (cfg->cbb, ins);
2318                         }
2319                         break;
2320                 default:
2321                         g_assert_not_reached ();
2322                         break;
2323                 }
2324         }
2325
2326         /*
2327          * Handle the case where there are no implicit arguments
2328          */
2329         if ((sig->call_convention == MONO_CALL_VARARG) &&
2330             (!sig->pinvoke) &&
2331             (i == sig->sentinelpos)) {
2332                 emit_sig_cookie (cfg, call, cinfo);
2333         }
2334 }
2335
2336 /*========================= End of Function ========================*/
2337
2338 /*------------------------------------------------------------------*/
2339 /*                                                                  */
2340 /* Name         - mono_arch_emit_outarg_vt                          */
2341 /*                                                                  */
2342 /*------------------------------------------------------------------*/
2343
2344 void
2345 mono_arch_emit_outarg_vt (MonoCompile *cfg, MonoInst *ins, MonoInst *src)
2346 {
2347         MonoCallInst *call = (MonoCallInst*)ins->inst_p0;
2348         ArgInfo *ainfo = (ArgInfo*)ins->inst_p1;
2349         int size = ins->backend.size;
2350
2351         if (ainfo->regtype == RegTypeStructByVal) {
2352                 /*
2353                                 arg->ins.sreg1  = ainfo->reg;
2354                                 arg->ins.opcode = OP_OUTARG_VT;
2355                                 arg->size       = ainfo->size;
2356                                 arg->offset     = ainfo->offset;
2357                                 arg->offPrm     = ainfo->offparm + cinfo->sz.offStruct;
2358                 */
2359                 if (ainfo->reg != STK_BASE) {
2360                         MONO_OUTPUT_VTR (cfg, size, ainfo->reg, src->dreg, 0);
2361                 } else {
2362                         MONO_OUTPUT_VTS (cfg, size, ainfo->reg, ainfo->offset,
2363                                                           src->dreg, 0);
2364                 }
2365         } else if (ainfo->regtype == RegTypeStructByValInFP) {
2366                 int dreg = mono_alloc_freg (cfg);
2367
2368                 if (ainfo->size == 4) {
2369                         MONO_EMIT_NEW_LOAD_MEMBASE_OP (cfg, OP_LOADR4_MEMBASE, dreg, src->dreg, 0);
2370                         MONO_EMIT_NEW_UNALU (cfg, OP_S390_SETF4RET, dreg, dreg);
2371                 } else {
2372                         g_assert (ainfo->size == 8);
2373
2374                         MONO_EMIT_NEW_LOAD_MEMBASE_OP (cfg, OP_LOADR8_MEMBASE, dreg, src->dreg, 0);
2375                 }
2376
2377                 mono_call_inst_add_outarg_reg (cfg, call, dreg, ainfo->reg, TRUE);
2378         } else {
2379                 MonoMethodHeader *header;
2380                 int srcReg;
2381
2382                 header = mono_method_get_header (cfg->method);
2383                 if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
2384                         srcReg = s390_r11;
2385                 else
2386                         srcReg = STK_BASE;
2387
2388                 MONO_EMIT_NEW_MOVE (cfg, srcReg, ainfo->offparm,
2389                                                          src->dreg, 0, size);
2390         }
2391 }
2392
2393 /*========================= End of Function ========================*/
2394
2395 /*------------------------------------------------------------------*/
2396 /*                                                                  */
2397 /* Name         - mono_arch_emit_setret                             */
2398 /*                                                                  */
2399 /*------------------------------------------------------------------*/
2400
2401 void
2402 mono_arch_emit_setret (MonoCompile *cfg, MonoMethod *method, MonoInst *val)
2403 {
2404         MonoType *ret = mono_type_get_underlying_type (mono_method_signature (method)->ret);
2405
2406         if (!ret->byref) {
2407                 if (ret->type == MONO_TYPE_R4) {
2408                         MONO_EMIT_NEW_UNALU (cfg, OP_S390_SETF4RET, s390_f0, val->dreg);
2409                         return;
2410                 } else if (ret->type == MONO_TYPE_R8) {
2411                         MONO_EMIT_NEW_UNALU (cfg, OP_FMOVE, s390_f0, val->dreg);
2412                         return;
2413                 }
2414         }
2415
2416         MONO_EMIT_NEW_UNALU (cfg, OP_MOVE, cfg->ret->dreg, val->dreg);
2417 }
2418
2419 /*========================= End of Function ========================*/
2420
2421 /*------------------------------------------------------------------*/
2422 /*                                                                  */
2423 /* Name         - mono_arch_instrument_mem_needs                    */
2424 /*                                                                  */
2425 /* Function     - Allow tracing to work with this interface (with   */
2426 /*                an optional argument).                            */
2427 /*                                                                  */
2428 /*------------------------------------------------------------------*/
2429
2430 void
2431 mono_arch_instrument_mem_needs (MonoMethod *method, int *stack, int *code)
2432 {
2433         /* no stack room needed now (may be needed for FASTCALL-trace support) */
2434         *stack = 0;
2435         /* split prolog-epilog requirements? */
2436         *code = 50; /* max bytes needed: check this number */
2437 }
2438
2439 /*========================= End of Function ========================*/
2440
2441 /*------------------------------------------------------------------*/
2442 /*                                                                  */
2443 /* Name         - mono_arch_instrument_prolog                       */
2444 /*                                                                  */
2445 /* Function     - Create an "instrumented" prolog.                  */
2446 /*                                                                  */
2447 /*------------------------------------------------------------------*/
2448
2449 void*
2450 mono_arch_instrument_prolog (MonoCompile *cfg, void *func, void *p,
2451                              gboolean enable_arguments)
2452 {
2453         guchar  *code = p;
2454         int     parmOffset,
2455                 fpOffset,
2456                 baseReg;
2457
2458         parmOffset = cfg->stack_usage - S390_TRACE_STACK_SIZE;
2459         if (cfg->method->save_lmf)
2460                 parmOffset -= sizeof(MonoLMF);
2461         fpOffset   = parmOffset + (5*sizeof(gpointer));
2462         if ((!has_ld) && (fpOffset > 4096)) {
2463                 s390_lgr (code, s390_r12, STK_BASE);
2464                 baseReg = s390_r12;
2465                 while (fpOffset > 4096) {
2466                         s390_aghi (code, baseReg, 4096);
2467                         fpOffset   -= 4096;
2468                         parmOffset -= 4096;
2469                 }
2470         } else {
2471                 baseReg = STK_BASE;
2472         }
2473
2474         s390_stmg (code, s390_r2, s390_r6, STK_BASE, parmOffset);
2475         if (has_ld) {
2476                 s390_stdy (code, s390_f0, 0, STK_BASE, fpOffset);
2477                 s390_stdy (code, s390_f2, 0, STK_BASE, fpOffset+sizeof(gdouble));
2478                 s390_stdy (code, s390_f4, 0, STK_BASE, fpOffset+2*sizeof(gdouble));
2479                 s390_stdy (code, s390_f6, 0, STK_BASE, fpOffset+3*sizeof(gdouble));
2480         } else {
2481                 s390_std  (code, s390_f0, 0, baseReg, fpOffset);
2482                 s390_std  (code, s390_f2, 0, baseReg, fpOffset+sizeof(gdouble));
2483                 s390_std  (code, s390_f4, 0, baseReg, fpOffset+2*sizeof(gdouble));
2484                 s390_std  (code, s390_f6, 0, baseReg, fpOffset+3*sizeof(gdouble));
2485         }
2486         s390_basr (code, s390_r13, 0);
2487         s390_j    (code, 10);
2488         s390_llong(code, cfg->method);
2489         s390_llong(code, func);
2490         s390_lg   (code, s390_r2, 0, s390_r13, 4);
2491         if (has_ld)
2492                 s390_lay  (code, s390_r3, 0, STK_BASE, parmOffset);
2493         else
2494                 s390_la   (code, s390_r3, 0, baseReg, parmOffset);
2495         s390_lgr  (code, s390_r4, STK_BASE);
2496         s390_aghi (code, s390_r4, cfg->stack_usage);
2497         s390_lg   (code, s390_r1, 0, s390_r13, 12);
2498         s390_basr (code, s390_r14, s390_r1);
2499         if (has_ld) {
2500                 s390_ldy  (code, s390_f6, 0, STK_BASE, fpOffset+3*sizeof(gdouble));
2501                 s390_ldy  (code, s390_f4, 0, STK_BASE, fpOffset+2*sizeof(gdouble));
2502                 s390_ldy  (code, s390_f2, 0, STK_BASE, fpOffset+sizeof(gdouble));
2503                 s390_ldy  (code, s390_f0, 0, STK_BASE, fpOffset);
2504         } else {
2505                 s390_ld   (code, s390_f6, 0, baseReg, fpOffset+3*sizeof(gdouble));
2506                 s390_ld   (code, s390_f4, 0, baseReg, fpOffset+2*sizeof(gdouble));
2507                 s390_ld   (code, s390_f2, 0, baseReg, fpOffset+sizeof(gdouble));
2508                 s390_ld   (code, s390_f0, 0, baseReg, fpOffset);
2509         }
2510         s390_lmg  (code, s390_r2, s390_r6, STK_BASE, parmOffset);
2511
2512         return code;
2513 }
2514
2515 /*========================= End of Function ========================*/
2516
2517 /*------------------------------------------------------------------*/
2518 /*                                                                  */
2519 /* Name         - mono_arch_instrument_epilog                       */
2520 /*                                                                  */
2521 /* Function     - Create an epilog that will handle the returned    */
2522 /*                values used in instrumentation.                   */
2523 /*                                                                  */
2524 /*------------------------------------------------------------------*/
2525
2526 void*
2527 mono_arch_instrument_epilog_full (MonoCompile *cfg, void *func, void *p, gboolean enable_arguments, gboolean preserve_argument_registers)
2528 {
2529         guchar     *code = p;
2530         int        save_mode = SAVE_NONE,
2531                    saveOffset;
2532         MonoMethod *method = cfg->method;
2533         int        rtype = mono_type_get_underlying_type (mono_method_signature (method)->ret)->type;
2534
2535         saveOffset = cfg->stack_usage - S390_TRACE_STACK_SIZE;
2536         if (method->save_lmf)
2537                 saveOffset -= sizeof(MonoLMF);
2538
2539 handle_enum:
2540         switch (rtype) {
2541         case MONO_TYPE_VOID:
2542                 /* special case string .ctor icall */
2543                 if (strcmp (".ctor", method->name) && method->klass == mono_defaults.string_class)
2544                         save_mode = SAVE_ONE;
2545                 else
2546                         save_mode = SAVE_NONE;
2547                 break;
2548         case MONO_TYPE_I8:
2549         case MONO_TYPE_U8:
2550                 save_mode = SAVE_ONE;
2551                 break;
2552         case MONO_TYPE_R4:
2553                 save_mode = SAVE_R4;
2554                 break;
2555         case MONO_TYPE_R8:
2556                 save_mode = SAVE_R8;
2557                 break;
2558         case MONO_TYPE_VALUETYPE:
2559                 if (mono_method_signature (method)->ret->data.klass->enumtype) {
2560                         rtype = mono_class_enum_basetype (mono_method_signature (method)->ret->data.klass)->type;
2561                         goto handle_enum;
2562                 }
2563                 save_mode = SAVE_STRUCT;
2564                 break;
2565         default:
2566                 save_mode = SAVE_ONE;
2567                 break;
2568         }
2569
2570         switch (save_mode) {
2571         case SAVE_ONE:
2572                 s390_stg (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2573                 if (enable_arguments) {
2574                         s390_lgr (code, s390_r3, s390_r2);
2575                 }
2576                 break;
2577         case SAVE_R4:
2578                 s390_std (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2579                 if (enable_arguments) {
2580                         s390_ldebr (code, s390_f0, s390_f0);
2581                 }
2582                 break;
2583         case SAVE_R8:
2584                 s390_std (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2585                 break;
2586         case SAVE_STRUCT:
2587                 s390_stg (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2588                 if (enable_arguments) {
2589                         s390_lg (code, s390_r3, 0, cfg->frame_reg,
2590                                  S390_MINIMAL_STACK_SIZE+cfg->param_area);
2591                 }
2592                 break;
2593         case SAVE_NONE:
2594         default:
2595                 break;
2596         }
2597
2598         s390_basr (code, s390_r13, 0);
2599         s390_j    (code, 10);
2600         s390_llong(code, cfg->method);
2601         s390_llong(code, func);
2602         s390_lg   (code, s390_r2, 0, s390_r13, 4);
2603         s390_lg   (code, s390_r1, 0, s390_r13, 12);
2604         s390_basr (code, s390_r14, s390_r1);
2605
2606         switch (save_mode) {
2607         case SAVE_ONE:
2608                 s390_lg  (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2609                 break;
2610         case SAVE_R4:
2611         case SAVE_R8:
2612                 s390_ld  (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2613                 break;
2614         case SAVE_STRUCT:
2615                 s390_lg  (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2616                 break;
2617         case SAVE_NONE:
2618         default:
2619                 break;
2620         }
2621
2622         return code;
2623 }
2624
2625 /*========================= End of Function ========================*/
2626
2627 /*------------------------------------------------------------------*/
2628 /*                                                                  */
2629 /* Name         - mono_arch_peephole_pass_1                         */
2630 /*                                                                  */
2631 /* Function     - Form a peephole pass at the code looking for      */
2632 /*                simple optimizations.                             */
2633 /*                                                                  */
2634 /*------------------------------------------------------------------*/
2635
2636 void
2637 mono_arch_peephole_pass_1 (MonoCompile *cfg, MonoBasicBlock *bb)
2638 {
2639 }
2640
2641 /*========================= End of Function ========================*/
2642
2643 /*------------------------------------------------------------------*/
2644 /*                                                                  */
2645 /* Name         - mono_arch_peephole_pass_2                         */
2646 /*                                                                  */
2647 /* Function     - Form a peephole pass at the code looking for      */
2648 /*                simple optimizations.                             */
2649 /*                                                                  */
2650 /*------------------------------------------------------------------*/
2651
2652 void
2653 mono_arch_peephole_pass_2 (MonoCompile *cfg, MonoBasicBlock *bb)
2654 {
2655         MonoInst *ins, *n;
2656
2657         MONO_BB_FOR_EACH_INS_SAFE (bb, n, ins) {
2658                 mono_peephole_ins (bb, ins);
2659         }
2660 }
2661
2662 /*========================= End of Function ========================*/
2663
2664 /*------------------------------------------------------------------*/
2665 /*                                                                  */
2666 /* Name         - mono_arch_lowering_pass.                          */
2667 /*                                                                  */
2668 /*------------------------------------------------------------------*/
2669
2670 void
2671 mono_arch_lowering_pass (MonoCompile *cfg, MonoBasicBlock *bb)
2672 {
2673         MonoInst *ins, *next;
2674
2675         MONO_BB_FOR_EACH_INS_SAFE (bb, next, ins) {
2676                 switch (ins->opcode) {
2677                 case OP_DIV_IMM:
2678                 case OP_REM_IMM:
2679                 case OP_IDIV_IMM:
2680                 case OP_IREM_IMM:
2681                 case OP_IDIV_UN_IMM:
2682                 case OP_IREM_UN_IMM:
2683                 case OP_LAND_IMM:
2684                 case OP_LOR_IMM:
2685                 case OP_LXOR_IMM:
2686                 case OP_LOCALLOC_IMM:
2687                         mono_decompose_op_imm (cfg, bb, ins);
2688                         break;
2689                 case OP_LADD_IMM:
2690                         if (!s390_is_imm16 (ins->inst_imm))
2691                                 /* This is created by the memcpy code which ignores is_inst_imm */
2692                                 mono_decompose_op_imm (cfg, bb, ins);
2693                         break;
2694                 default:
2695                         break;
2696                 }
2697         }
2698
2699         bb->max_vreg = cfg->next_vreg;
2700 }
2701
2702 /*========================= End of Function ========================*/
2703
2704 /*------------------------------------------------------------------*/
2705 /*                                                                  */
2706 /* Name         - emit_float_to_int                                 */
2707 /*                                                                  */
2708 /* Function     - Create instructions which will convert a floating */
2709 /*                point value to integer.                           */
2710 /*                                                                  */
2711 /*------------------------------------------------------------------*/
2712
2713 static guchar*
2714 emit_float_to_int (MonoCompile *cfg, guchar *code, int dreg, int sreg, int size, gboolean is_signed)
2715 {
2716         /* sreg is a float, dreg is an integer reg. */
2717         if (is_signed) {
2718                 s390_cgdbr (code, dreg, 5, sreg);
2719                 switch (size) {
2720                         case 1:
2721                                 s390_lghi (code, s390_r0, 0);
2722                                 s390_lghi (code, s390_r13, 0xff);
2723                                 s390_ltgr (code, dreg, dreg);
2724                                 s390_jnl  (code, 4);
2725                                 s390_lghi (code, s390_r0, 0x80);
2726                                 s390_ngr  (code, dreg, s390_r13);
2727                                 s390_ogr  (code, dreg, s390_r0);
2728                                 break;
2729                 }
2730         } else {
2731                 short *o[1];
2732                 s390_basr   (code, s390_r13, 0);
2733                 s390_j      (code, 10);
2734                 s390_llong  (code, 0x41e0000000000000llu);
2735                 s390_llong  (code, 0x41f0000000000000llu);
2736                 s390_ldr    (code, s390_f15, sreg);
2737                 s390_cdb    (code, s390_f15, 0, s390_r13, 4);
2738                 s390_jl     (code, 0); CODEPTR (code, o[0]);
2739                 s390_sdb    (code, s390_f15, 0, s390_r13, 12);
2740                 s390_cfdbr  (code, dreg, 7, s390_f15);
2741                 s390_j      (code, 4);
2742                 PTRSLOT (code, o[0]);
2743                 s390_cfdbr  (code, dreg, 5, sreg);
2744                 switch (size) {
2745                         case 1:
2746                                 s390_lghi (code, s390_r0, 0xff);
2747                                 s390_ngr  (code, dreg, s390_r0);
2748                                 break;
2749                         case 2:
2750                                 s390_lghi (code, s390_r0, -1);
2751                                 s390_srlg (code, s390_r0, s390_r0, 0, 16);
2752                                 s390_ngr  (code, dreg, s390_r0);
2753                                 break;
2754                 }
2755         }
2756         return code;
2757 }
2758
2759 /*========================= End of Function ========================*/
2760
2761 /*------------------------------------------------------------------*/
2762 /*                                                                  */
2763 /* Name         - gboolean_is_unsigned.                             */
2764 /*                                                                  */
2765 /* Function     - Return TRUE if next opcode is checking for un-    */
2766 /*                signed value.                                     */
2767 /*                                                                  */
2768 /*------------------------------------------------------------------*/
2769
2770 static
2771 gboolean is_unsigned (MonoInst *next)
2772 {
2773         if ((next) &&
2774                 (((next->opcode >= OP_IBNE_UN) &&
2775                   (next->opcode <= OP_IBLT_UN)) ||
2776                  ((next->opcode >= OP_LBNE_UN) &&
2777                   (next->opcode <= OP_LBLT_UN)) ||
2778                  ((next->opcode >= OP_COND_EXC_NE_UN) &&
2779                   (next->opcode <= OP_COND_EXC_LT_UN)) ||
2780                  ((next->opcode >= OP_COND_EXC_INE_UN) &&
2781                   (next->opcode <= OP_COND_EXC_ILT_UN)) ||
2782                  ((next->opcode == OP_CLT_UN) ||
2783                   (next->opcode == OP_CGT_UN)) ||
2784                  ((next->opcode == OP_ICLT_UN) ||
2785                   (next->opcode == OP_ICGT_UN) ||
2786                   (next->opcode == OP_LCLT_UN) ||
2787                   (next->opcode == OP_LCGT_UN))))
2788                 return TRUE;
2789         else
2790                 return FALSE;
2791 }
2792
2793 /*========================= End of Function ========================*/
2794
2795 /*------------------------------------------------------------------*/
2796 /*                                                                  */
2797 /* Name         - mono_arch_output_basic_block                      */
2798 /*                                                                  */
2799 /* Function     - Perform the "real" work of emitting instructions  */
2800 /*                that will do the work of in the basic block.      */
2801 /*                                                                  */
2802 /*------------------------------------------------------------------*/
2803
2804 void
2805 mono_arch_output_basic_block (MonoCompile *cfg, MonoBasicBlock *bb)
2806 {
2807         MonoInst *ins;
2808         MonoCallInst *call;
2809         guint offset;
2810         guint8 *code = cfg->native_code + cfg->code_len;
2811         guint last_offset = 0;
2812         int max_len, cpos, src2;
2813
2814         /* we don't align basic blocks of loops on s390 */
2815
2816         if (cfg->verbose_level > 2)
2817                 g_print ("Basic block %d starting at offset 0x%x\n", bb->block_num, bb->native_offset);
2818
2819         cpos = bb->max_offset;
2820
2821         if (cfg->prof_options & MONO_PROFILE_COVERAGE) {
2822                 //MonoCoverageInfo *cov = mono_get_coverage_info (cfg->method);
2823                 //g_assert (!mono_compile_aot);
2824                 //cpos += 6;
2825                 //if (bb->cil_code)
2826                 //      cov->data [bb->dfn].iloffset = bb->cil_code - cfg->cil_code;
2827                 /* this is not thread save, but good enough */
2828                 /* fixme: howto handle overflows? */
2829                 //x86_inc_mem (code, &cov->data [bb->dfn].count);
2830         }
2831
2832         MONO_BB_FOR_EACH_INS (bb, ins) {
2833                 offset = code - cfg->native_code;
2834
2835                 max_len = ((guint8 *)ins_get_spec (ins->opcode))[MONO_INST_LEN];
2836
2837                 if (offset > (cfg->code_size - max_len - 16)) {
2838                         cfg->code_size *= 2;
2839                         cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
2840                         code = cfg->native_code + offset;
2841                 }
2842
2843                 mono_debug_record_line_number (cfg, ins, offset);
2844
2845                 switch (ins->opcode) {
2846                 case OP_STOREI1_MEMBASE_IMM: {
2847                         s390_lghi (code, s390_r0, ins->inst_imm);
2848                         S390_LONG (code, stcy, stc, s390_r0, 0,
2849                                    ins->inst_destbasereg, ins->inst_offset);
2850                 }
2851                         break;
2852                 case OP_STOREI2_MEMBASE_IMM: {
2853                         s390_lghi (code, s390_r0, ins->inst_imm);
2854                         S390_LONG (code, sthy, sth, s390_r0, 0,
2855                                    ins->inst_destbasereg, ins->inst_offset);
2856                 }
2857                         break;
2858                 case OP_STOREI4_MEMBASE_IMM: {
2859                         if (s390_is_imm16(ins->inst_imm)) {
2860                                 s390_lghi (code, s390_r0, ins->inst_imm);
2861                         } else {
2862                                 s390_basr (code, s390_r13, 0);
2863                                 s390_j    (code, 6);
2864                                 s390_llong(code, ins->inst_imm);
2865                                 s390_lg   (code, s390_r0, 0, s390_r13, 4);
2866                         }
2867                         S390_LONG (code, sty, st, s390_r0, 0,
2868                                    ins->inst_destbasereg, ins->inst_offset);
2869                 }
2870                         break;
2871                 case OP_STORE_MEMBASE_IMM:
2872                 case OP_STOREI8_MEMBASE_IMM: {
2873                         if (s390_is_imm16(ins->inst_imm)) {
2874                                 s390_lghi (code, s390_r0, ins->inst_imm);
2875                         } else {
2876                                 s390_basr (code, s390_r13, 0);
2877                                 s390_j    (code, 6);
2878                                 s390_llong(code, ins->inst_imm);
2879                                 s390_lg   (code, s390_r0, 0, s390_r13, 4);
2880                         }
2881                         S390_LONG (code, stg, stg, s390_r0, 0,
2882                                    ins->inst_destbasereg, ins->inst_offset);
2883                 }
2884                         break;
2885                 case OP_STOREI1_MEMBASE_REG: {
2886                         S390_LONG (code, stcy, stc, ins->sreg1, 0,
2887                                    ins->inst_destbasereg, ins->inst_offset);
2888                 }
2889                         break;
2890                 case OP_STOREI2_MEMBASE_REG: {
2891                         S390_LONG (code, sthy, sth, ins->sreg1, 0,
2892                                    ins->inst_destbasereg, ins->inst_offset);
2893                 }
2894                         break;
2895                 case OP_STOREI4_MEMBASE_REG: {
2896                         S390_LONG (code, sty, st, ins->sreg1, 0,
2897                                    ins->inst_destbasereg, ins->inst_offset);
2898                 }
2899                         break;
2900                 case OP_STORE_MEMBASE_REG:
2901                 case OP_STOREI8_MEMBASE_REG: {
2902                         S390_LONG (code, stg, stg, ins->sreg1, 0,
2903                                    ins->inst_destbasereg, ins->inst_offset);
2904                 }
2905                         break;
2906                 case OP_LOADU4_MEM:
2907                         g_assert_not_reached ();
2908                         break;
2909                 case OP_LOAD_MEMBASE:
2910                 case OP_LOADI8_MEMBASE: {
2911                         S390_LONG (code, lg, lg, ins->dreg, 0,
2912                                    ins->inst_basereg, ins->inst_offset);
2913                 }
2914                         break;
2915                 case OP_LOADI4_MEMBASE: {
2916                         S390_LONG (code, lgf, lgf, ins->dreg, 0,
2917                                    ins->inst_basereg, ins->inst_offset);
2918                 }
2919                         break;
2920                 case OP_LOADU4_MEMBASE: {
2921                         S390_LONG (code, llgf, llgf, ins->dreg, 0,
2922                                    ins->inst_basereg, ins->inst_offset);
2923                 }
2924                         break;
2925                 case OP_LOADU1_MEMBASE: {
2926                         S390_LONG (code, llgc, llgc, ins->dreg, 0,
2927                                    ins->inst_basereg, ins->inst_offset);
2928                 }
2929                         break;
2930                 case OP_LOADI1_MEMBASE: {
2931                         S390_LONG (code, lgb, lgb, ins->dreg, 0,
2932                                    ins->inst_basereg, ins->inst_offset);
2933                 }
2934                         break;
2935                 case OP_LOADU2_MEMBASE: {
2936                         S390_LONG (code, llgh, llgh, ins->dreg, 0,
2937                                    ins->inst_basereg, ins->inst_offset);
2938                 }
2939                         break;
2940                 case OP_LOADI2_MEMBASE: {
2941                         S390_LONG (code, lgh, lgh, ins->dreg, 0,
2942                                    ins->inst_basereg, ins->inst_offset);
2943                 }
2944                         break;
2945                 case OP_LCONV_TO_I1: {
2946 #if 0
2947                         s390_lgbr (code, ins->dreg, ins->sreg1);
2948 #else
2949                         s390_sllg (code, ins->dreg, ins->sreg1, 0, 56);
2950                         s390_srag (code, ins->dreg, ins->dreg, 0, 56);
2951 #endif
2952                 }
2953                         break;
2954                 case OP_LCONV_TO_I2: {
2955 #if 0
2956                         s390_lghr (code, ins->dreg, ins->sreg1);
2957 #else
2958                         s390_sllg (code, ins->dreg, ins->sreg1, 0, 48);
2959                         s390_srag (code, ins->dreg, ins->dreg, 0, 48);
2960 #endif
2961                 }
2962                         break;
2963                 case OP_LCONV_TO_U1: {
2964 #if 0
2965                         s390_llghr (code, ins->dreg, ins->sreg1);
2966 #else
2967                         if (ins->dreg != ins->sreg1)
2968                                 s390_lgr  (code, ins->dreg, ins->sreg1);
2969                         s390_lghi  (code, s390_r0, 0xff);
2970                         s390_ngr   (code, ins->dreg, s390_r0);
2971 #endif
2972                 }
2973                         break;
2974                 case OP_LCONV_TO_U2: {
2975 #if 0
2976                         s390_llghr (code, ins->dreg, ins->sreg1);
2977 #else
2978                         if (ins->dreg != ins->sreg1)
2979                                 s390_lgr  (code, ins->dreg, ins->sreg1);
2980                         s390_lghi  (code, s390_r0, -1);
2981                         s390_srlg  (code, s390_r0, s390_r0, 0, 48);
2982                         s390_ngr   (code, ins->dreg, s390_r0);
2983 #endif
2984                 }
2985                         break;
2986                 case OP_ICONV_TO_I1: {
2987 #if 0
2988                         s390_lbr  (code, ins->dreg, ins->sreg1);
2989 #else
2990                         if (ins->dreg != ins->sreg1)
2991                                 s390_lr  (code, ins->dreg, ins->sreg1);
2992                         s390_sll (code, ins->dreg, 0, 24);
2993                         s390_sra (code, ins->dreg, 0, 24);
2994
2995 #endif
2996                 }
2997                         break;
2998                 case OP_ICONV_TO_I2: {
2999 #if 0
3000                         s390_lhr  (code, ins->dreg, ins->sreg1);
3001 #else
3002                         if (ins->dreg != ins->sreg1)
3003                                 s390_lr  (code, ins->dreg, ins->sreg1);
3004                         s390_sll (code, ins->dreg, 0, 16);
3005                         s390_sra (code, ins->dreg, 0, 16);
3006 #endif
3007                 }
3008                         break;
3009                 case OP_ICONV_TO_U1: {
3010 #if 0
3011                         s390_llcr (code, ins->dreg, ins->sreg1);
3012 #else
3013                         if (ins->dreg != ins->sreg1)
3014                                 s390_lr  (code, ins->dreg, ins->sreg1);
3015                         s390_lhi  (code, s390_r0, 0xff);
3016                         s390_nr   (code, ins->dreg, s390_r0);
3017 #endif
3018                 }
3019                         break;
3020                 case OP_ICONV_TO_U2: {
3021 #if 0
3022                         s390_llhr (code, ins->dreg, ins->sreg1);
3023 #else
3024                         if (ins->dreg != ins->sreg1)
3025                                 s390_lr  (code, ins->dreg, ins->sreg1);
3026                         s390_lhi  (code, s390_r0, -1);
3027                         s390_srl  (code, s390_r0, 0, 16);
3028                         s390_nr   (code, ins->dreg, s390_r0);
3029 #endif
3030                 }
3031                         break;
3032                 case OP_COMPARE:
3033                 case OP_LCOMPARE: {
3034                         if (is_unsigned (ins->next))
3035                                 s390_clgr (code, ins->sreg1, ins->sreg2);
3036                         else
3037                                 s390_cgr  (code, ins->sreg1, ins->sreg2);
3038                 }
3039                         break;
3040                 case OP_ICOMPARE: {
3041                         if (is_unsigned (ins->next))
3042                                 s390_clr  (code, ins->sreg1, ins->sreg2);
3043                         else
3044                                 s390_cr   (code, ins->sreg1, ins->sreg2);
3045                 }
3046                         break;
3047                 case OP_COMPARE_IMM:
3048                 case OP_LCOMPARE_IMM: {
3049                         if (s390_is_imm16 (ins->inst_imm)) {
3050                                 s390_lghi (code, s390_r0, ins->inst_imm);
3051                                 if (is_unsigned (ins->next))
3052                                         s390_clgr (code, ins->sreg1, s390_r0);
3053                                 else
3054                                         s390_cgr  (code, ins->sreg1, s390_r0);
3055                         } else {
3056                                 s390_basr (code, s390_r13, 0);
3057                                 s390_j    (code, 6);
3058                                 s390_llong(code, ins->inst_imm);
3059                                 if (is_unsigned (ins->next))
3060                                         s390_clg  (code, ins->sreg1, 0, s390_r13, 4);
3061                                 else
3062                                         s390_cg   (code, ins->sreg1, 0, s390_r13, 4);
3063                         }
3064                 }
3065                         break;
3066                 case OP_ICOMPARE_IMM: {
3067                         if (s390_is_imm16 (ins->inst_imm)) {
3068                                 s390_lghi (code, s390_r0, ins->inst_imm);
3069                                 if (is_unsigned (ins->next))
3070                                         s390_clr  (code, ins->sreg1, s390_r0);
3071                                 else
3072                                         s390_cr   (code, ins->sreg1, s390_r0);
3073                         }
3074                         else {
3075                                 s390_basr (code, s390_r13, 0);
3076                                 s390_j    (code, 4);
3077                                 s390_word (code, ins->inst_imm);
3078                                 if (is_unsigned (ins->next))
3079                                         s390_cl  (code, ins->sreg1, 0, s390_r13, 4);
3080                                 else
3081                                         s390_c   (code, ins->sreg1, 0, s390_r13, 4);
3082                         }
3083                 }
3084                         break;
3085                 case OP_BREAK: {
3086                         s390_basr  (code, s390_r13, 0);
3087                         s390_j     (code, 6);
3088                         mono_add_patch_info (cfg, code - cfg->native_code, MONO_PATCH_INFO_ABS,
3089                                              mono_break);
3090                         s390_llong (code, mono_break);
3091                         s390_lg    (code, s390_r14, 0, s390_r13, 4);
3092                         s390_basr  (code, s390_r14, s390_r14);
3093                 }
3094                         break;
3095                 case OP_ADDCC: {
3096                         CHECK_SRCDST_COM;
3097                         s390_agr  (code, ins->dreg, src2);
3098                 }
3099                         break;
3100                 case OP_LADD: {
3101                         CHECK_SRCDST_COM;
3102                         s390_agr   (code, ins->dreg, src2);
3103                 }
3104                         break;
3105                 case OP_ADC: {
3106                         CHECK_SRCDST_COM;
3107                         s390_alcgr (code, ins->dreg, src2);
3108                 }
3109                         break;
3110                 case OP_ADD_IMM: {
3111                         if (ins->dreg != ins->sreg1) {
3112                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3113                         }
3114                         if (s390_is_imm16 (ins->inst_imm)) {
3115                                 s390_aghi (code, ins->dreg, ins->inst_imm);
3116                         } else {
3117                                 s390_basr (code, s390_r13, 0);
3118                                 s390_j    (code, 6);
3119                                 s390_llong(code, ins->inst_imm);
3120                                 s390_ag   (code, ins->dreg, 0, s390_r13, 4);
3121                         }
3122                 }
3123                         break;
3124                 case OP_LADD_IMM: {
3125                         if (ins->dreg != ins->sreg1) {
3126                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3127                         }
3128                         g_assert (s390_is_imm16 (ins->inst_imm));
3129                         s390_aghi (code, ins->dreg, ins->inst_imm);
3130                 }
3131                         break;
3132                 case OP_ADC_IMM: {
3133                         if (ins->dreg != ins->sreg1) {
3134                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3135                         }
3136                         if (s390_is_imm16 (ins->inst_imm)) {
3137                                 s390_lghi  (code, s390_r0, ins->inst_imm);
3138                                 s390_alcgr (code, ins->dreg, s390_r0);
3139                         } else {
3140                                 s390_basr  (code, s390_r13, 0);
3141                                 s390_j     (code, 6);
3142                                 s390_llong (code, ins->inst_imm);
3143                                 s390_lg    (code, s390_r13, 0, s390_r13, 4);
3144                                 s390_alcgr (code, ins->dreg, s390_r13);
3145                         }
3146                 }
3147                         break;
3148                 case OP_IADD_OVF:
3149                 case OP_S390_IADD_OVF: {
3150                         CHECK_SRCDST_COM;
3151                         s390_ar    (code, ins->dreg, src2);
3152                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3153                         s390_lgfr  (code, ins->dreg, ins->dreg);
3154                 }
3155                         break;
3156                 case OP_IADD_OVF_UN:
3157                 case OP_S390_IADD_OVF_UN: {
3158                         CHECK_SRCDST_COM;
3159                         s390_algr  (code, ins->dreg, src2);
3160                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
3161                         s390_llgfr (code, ins->dreg, ins->dreg);
3162                 }
3163                         break;
3164                 case OP_ADD_OVF_CARRY: {
3165                         CHECK_SRCDST_COM;
3166                         s390_lghi  (code, s390_r0, 0);
3167                         s390_lgr   (code, s390_r1, s390_r0);
3168                         s390_alcgr (code, s390_r0, s390_r1);
3169                         s390_agr   (code, ins->dreg, src2);
3170                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3171                         s390_agr   (code, ins->dreg, s390_r0);
3172                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3173                 }
3174                         break;
3175                 case OP_ADD_OVF_UN_CARRY: {
3176                         CHECK_SRCDST_COM;
3177                         s390_alcgr (code, ins->dreg, src2);
3178                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
3179                 }
3180                         break;
3181                 case OP_SUBCC: {
3182                         CHECK_SRCDST_NCOM;
3183                         s390_sgr (code, ins->dreg, src2);
3184                 }
3185                         break;
3186                 case OP_LSUB: {
3187                         CHECK_SRCDST_NCOM;
3188                         s390_sgr  (code, ins->dreg, src2);
3189                 }
3190                         break;
3191                 case OP_SBB: {
3192                         CHECK_SRCDST_NCOM;
3193                         s390_slbgr(code, ins->dreg, src2);
3194                 }
3195                         break;
3196                 case OP_SUB_IMM: {
3197                         if (ins->dreg != ins->sreg1) {
3198                                 s390_lgr   (code, ins->dreg, ins->sreg1);
3199                         }
3200                         if (s390_is_imm16 (-ins->inst_imm)) {
3201                                 s390_lghi  (code, s390_r0, ins->inst_imm);
3202                                 s390_slgr  (code, ins->dreg, s390_r0);
3203                         } else {
3204                                 s390_basr (code, s390_r13, 0);
3205                                 s390_j    (code, 6);
3206                                 s390_llong(code, ins->inst_imm);
3207                                 s390_slg  (code, ins->dreg, 0, s390_r13, 4);
3208                         }
3209                 }
3210                         break;
3211                 case OP_LSUB_IMM: {
3212                         if (ins->dreg != ins->sreg1) {
3213                                 s390_lgr   (code, ins->dreg, ins->sreg1);
3214                         }
3215                         if (s390_is_imm16 (-ins->inst_imm)) {
3216                                 s390_lghi  (code, s390_r0, ins->inst_imm);
3217                                 s390_slgr  (code, ins->dreg, s390_r0);
3218                         } else {
3219                                 s390_basr (code, s390_r13, 0);
3220                                 s390_j    (code, 6);
3221                                 s390_llong(code, ins->inst_imm);
3222                                 s390_slg  (code, ins->dreg, 0, s390_r13, 4);
3223                         }
3224                 }
3225                         break;
3226                 case OP_SBB_IMM: {
3227                         if (ins->dreg != ins->sreg1) {
3228                                 s390_lgr   (code, ins->dreg, ins->sreg1);
3229                         }
3230                         if (s390_is_imm16 (-ins->inst_imm)) {
3231                                 s390_lghi  (code, s390_r0, ins->inst_imm);
3232                                 s390_slbgr (code, ins->dreg, s390_r0);
3233                         } else {
3234                                 s390_basr (code, s390_r13, 0);
3235                                 s390_j    (code, 6);
3236                                 s390_llong(code, ins->inst_imm);
3237                                 s390_slbg (code, ins->dreg, 0, s390_r13, 4);
3238                         }
3239                 }
3240                         break;
3241                 case OP_SUB_OVF_CARRY: {
3242                         CHECK_SRCDST_NCOM;
3243                         s390_lghi  (code, s390_r0, 0);
3244                         s390_lgr   (code, s390_r1, s390_r0);
3245                         s390_slbgr (code, s390_r0, s390_r1);
3246                         s390_sgr   (code, ins->dreg, src2);
3247                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3248                         s390_agr   (code, ins->dreg, s390_r0);
3249                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3250                 }
3251                         break;
3252                 case OP_SUB_OVF_UN_CARRY: {
3253                         CHECK_SRCDST_NCOM;
3254                         s390_slbgr (code, ins->dreg, src2);
3255                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
3256                 }
3257                         break;
3258                 case OP_LAND: {
3259                         if (ins->sreg1 == ins->dreg) {
3260                                 s390_ngr  (code, ins->dreg, ins->sreg2);
3261                         }
3262                         else {
3263                                 if (ins->sreg2 == ins->dreg) {
3264                                         s390_ngr (code, ins->dreg, ins->sreg1);
3265                                 }
3266                                 else {
3267                                         s390_lgr (code, ins->dreg, ins->sreg1);
3268                                         s390_ngr (code, ins->dreg, ins->sreg2);
3269                                 }
3270                         }
3271                 }
3272                         break;
3273                 case OP_AND_IMM: {
3274                         if (ins->dreg != ins->sreg1) {
3275                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3276                         }
3277                         if (s390_is_imm16 (ins->inst_imm)) {
3278                                 s390_lghi  (code, s390_r0, ins->inst_imm);
3279                                 s390_ngr  (code, ins->dreg, s390_r0);
3280                         } else {
3281                                 s390_basr (code, s390_r13, 0);
3282                                 s390_j    (code, 6);
3283                                 s390_llong(code, ins->inst_imm);
3284                                 s390_ng   (code, ins->dreg, 0, s390_r13, 4);
3285                         }
3286                 }
3287                         break;
3288                 case OP_LDIV: {
3289                         s390_lgr  (code, s390_r1, ins->sreg1);
3290                         s390_dsgr (code, s390_r0, ins->sreg2);
3291                         s390_lgr  (code, ins->dreg, s390_r1);
3292                 }
3293                         break;
3294                 case OP_LDIV_UN: {
3295                         s390_lgr   (code, s390_r1, ins->sreg1);
3296                         s390_lghi  (code, s390_r0, 0);
3297                         s390_dlgr  (code, s390_r0, ins->sreg2);
3298                         s390_lgr   (code, ins->dreg, s390_r1);
3299                 }
3300                         break;
3301                 case OP_LREM: {
3302                         s390_lgr  (code, s390_r1, ins->sreg1);
3303                         s390_dsgr (code, s390_r0, ins->sreg2);
3304                         s390_lgr  (code, ins->dreg, s390_r0);
3305                         break;
3306                 }
3307                 case OP_LREM_UN: {
3308                         s390_lgr   (code, s390_r1, ins->sreg1);
3309                         s390_lghi  (code, s390_r0, 0);
3310                         s390_dlgr  (code, s390_r0, ins->sreg2);
3311                         s390_lgr   (code, ins->dreg, s390_r0);
3312                 }
3313                         break;
3314                 case OP_LOR: {
3315                         if (ins->sreg1 == ins->dreg) {
3316                                 s390_ogr  (code, ins->dreg, ins->sreg2);
3317                         }
3318                         else {
3319                                 if (ins->sreg2 == ins->dreg) {
3320                                         s390_ogr (code, ins->dreg, ins->sreg1);
3321                                 }
3322                                 else {
3323                                         s390_lgr (code, ins->dreg, ins->sreg1);
3324                                         s390_ogr (code, ins->dreg, ins->sreg2);
3325                                 }
3326                         }
3327                 }
3328                         break;
3329                 case OP_OR_IMM: {
3330                         if (ins->dreg != ins->sreg1) {
3331                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3332                         }
3333                         if (s390_is_imm16 (ins->inst_imm)) {
3334                                 s390_lghi (code, s390_r0, ins->inst_imm);
3335                                 s390_ogr  (code, ins->dreg, s390_r0);
3336                         } else {
3337                                 s390_basr (code, s390_r13, 0);
3338                                 s390_j    (code, 6);
3339                                 s390_llong(code, ins->inst_imm);
3340                                 s390_og   (code, ins->dreg, 0, s390_r13, 4);
3341                         }
3342                 }
3343                         break;
3344                 case OP_LXOR: {
3345                         if (ins->sreg1 == ins->dreg) {
3346                                 s390_xgr  (code, ins->dreg, ins->sreg2);
3347                         }
3348                         else {
3349                                 if (ins->sreg2 == ins->dreg) {
3350                                         s390_xgr (code, ins->dreg, ins->sreg1);
3351                                 }
3352                                 else {
3353                                         s390_lgr (code, ins->dreg, ins->sreg1);
3354                                         s390_xgr (code, ins->dreg, ins->sreg2);
3355                                 }
3356                         }
3357                 }
3358                         break;
3359                 case OP_XOR_IMM: {
3360                         if (ins->dreg != ins->sreg1) {
3361                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3362                         }
3363                         if (s390_is_imm16 (ins->inst_imm)) {
3364                                 s390_lghi  (code, s390_r0, ins->inst_imm);
3365                                 s390_xgr  (code, ins->dreg, s390_r0);
3366                         } else {
3367                                 s390_basr (code, s390_r13, 0);
3368                                 s390_j    (code, 6);
3369                                 s390_llong(code, ins->inst_imm);
3370                                 s390_xg   (code, ins->dreg, 0, s390_r13, 4);
3371                         }
3372                 }
3373                         break;
3374                 case OP_LSHL: {
3375                         CHECK_SRCDST_NCOM;
3376                         s390_sllg (code, ins->dreg, ins->dreg, src2, 0);
3377                 }
3378                         break;
3379                 case OP_SHL_IMM:
3380                 case OP_LSHL_IMM: {
3381                         if (ins->sreg1 != ins->dreg) {
3382                                 s390_lgr   (code, ins->dreg, ins->sreg1);
3383                         }
3384                         s390_sllg (code, ins->dreg, ins->dreg, 0, (ins->inst_imm & 0x3f));
3385                 }
3386                         break;
3387                 case OP_LSHR: {
3388                         CHECK_SRCDST_NCOM;
3389                         s390_srag  (code, ins->dreg, ins->dreg, src2, 0);
3390                 }
3391                         break;
3392                 case OP_SHR_IMM:
3393                 case OP_LSHR_IMM: {
3394                         if (ins->sreg1 != ins->dreg) {
3395                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3396                         }
3397                         s390_srag  (code, ins->dreg, ins->dreg, 0, (ins->inst_imm & 0x3f));
3398                 }
3399                         break;
3400                 case OP_SHR_UN_IMM:
3401                 case OP_LSHR_UN_IMM: {
3402                         if (ins->sreg1 != ins->dreg) {
3403                                 s390_lgr   (code, ins->dreg, ins->sreg1);
3404                         }
3405                         s390_srlg (code, ins->dreg, ins->dreg, 0, (ins->inst_imm & 0x3f));
3406                 }
3407                         break;
3408                 case OP_LSHR_UN: {
3409                         CHECK_SRCDST_NCOM;
3410                         s390_srlg (code, ins->dreg, ins->dreg, src2, 0);
3411                 }
3412                         break;
3413                 case OP_LNOT: {
3414                         if (ins->sreg1 != ins->dreg) {
3415                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3416                         }
3417                         s390_lghi (code, s390_r0, -1);
3418                         s390_xgr  (code, ins->dreg, s390_r0);
3419                 }
3420                         break;
3421                 case OP_LNEG: {
3422                         s390_lcgr (code, ins->dreg, ins->sreg1);
3423                 }
3424                         break;
3425                 case OP_LMUL: {
3426                         CHECK_SRCDST_COM;
3427                         s390_msgr (code, ins->dreg, src2);
3428                 }
3429                         break;
3430                 case OP_MUL_IMM:
3431                 case OP_LMUL_IMM: {
3432                         if (ins->dreg != ins->sreg1) {
3433                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3434                         }
3435                         if (s390_is_imm16 (ins->inst_imm)) {
3436                                 s390_lghi (code, s390_r13, ins->inst_imm);
3437                         } else {
3438                                 s390_basr (code, s390_r13, 0);
3439                                 s390_j    (code, 6);
3440                                 s390_llong(code, ins->inst_imm);
3441                                 s390_lg   (code, s390_r13, 0, s390_r13, 4);
3442                         }
3443                         s390_msgr (code, ins->dreg, s390_r13);
3444                 }
3445                         break;
3446                 case OP_LMUL_OVF: {
3447                         short int *o[2];
3448                         s390_ltgr (code, s390_r1, ins->sreg1);
3449                         s390_jz   (code, 0); CODEPTR(code, o[0]);
3450                         s390_ltgr (code, s390_r0, ins->sreg2);
3451                         s390_jnz  (code, 6);
3452                         s390_lghi (code, s390_r1, 0);
3453                         s390_j    (code, 0); CODEPTR(code, o[1]);
3454                         s390_xgr  (code, s390_r0, s390_r1);
3455                         s390_msgr (code, s390_r1, ins->sreg2);
3456                         s390_xgr  (code, s390_r0, s390_r1);
3457                         s390_srlg (code, s390_r0, s390_r0, 0, 63);
3458                         s390_ltgr (code, s390_r0, s390_r0);
3459                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3460                         PTRSLOT   (code, o[0]);
3461                         PTRSLOT   (code, o[1]);
3462                         s390_lgr  (code, ins->dreg, s390_r1);
3463                 }
3464                         break;
3465                 case OP_LMUL_OVF_UN: {
3466                         s390_lghi  (code, s390_r0, 0);
3467                         s390_lgr   (code, s390_r1, ins->sreg1);
3468                         s390_mlgr  (code, s390_r0, ins->sreg2);
3469                         s390_ltgr  (code, s390_r0, s390_r0);
3470                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3471                         s390_lgr   (code, ins->dreg, s390_r1);
3472                 }
3473                         break;
3474                 case OP_IADDCC: {
3475                         g_assert_not_reached ();
3476                         CHECK_SRCDST_COM_I;
3477                         s390_algr (code, ins->dreg, src2);
3478                 }
3479                         break;
3480                 case OP_IADD: {
3481                         CHECK_SRCDST_COM_I;
3482                         s390_agr  (code, ins->dreg, src2);
3483                 }
3484                         break;
3485                 case OP_IADC: {
3486                         g_assert_not_reached ();
3487                         CHECK_SRCDST_COM_I;
3488                         s390_alcgr (code, ins->dreg, src2);
3489                 }
3490                         break;
3491                 case OP_IADD_IMM: {
3492                         if (ins->dreg != ins->sreg1) {
3493                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3494                         }
3495                         if (s390_is_imm16 (ins->inst_imm)) {
3496                                 s390_aghi(code, ins->dreg, ins->inst_imm);
3497                         } else {
3498                                 s390_basr (code, s390_r13, 0);
3499                                 s390_j    (code, 4);
3500                                 s390_word (code, ins->inst_imm);
3501                                 s390_agf  (code, ins->dreg, 0, s390_r13, 4);
3502                         }
3503                 }
3504                         break;
3505                 case OP_IADC_IMM: {
3506                         if (ins->dreg != ins->sreg1) {
3507                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3508                         }
3509                         if (s390_is_imm16 (ins->inst_imm)) {
3510                                 s390_lghi  (code, s390_r0, ins->inst_imm);
3511                                 s390_alcgr (code, ins->dreg, s390_r0);
3512                         } else {
3513                                 s390_basr  (code, s390_r13, 0);
3514                                 s390_j     (code, 4);
3515                                 s390_word  (code, ins->inst_imm);
3516                                 s390_lgf   (code, s390_r13, 0, s390_r13, 4);
3517                                 s390_alcgr (code, ins->dreg, s390_r13);
3518                         }
3519                 }
3520                         break;
3521                 case OP_LADD_OVF:
3522                 case OP_S390_LADD_OVF: {
3523                         CHECK_SRCDST_COM;
3524                         s390_agr    (code, ins->dreg, src2);
3525                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3526                 }
3527                         break;
3528                 case OP_LADD_OVF_UN:
3529                 case OP_S390_LADD_OVF_UN: {
3530                         CHECK_SRCDST_COM;
3531                         s390_algr  (code, ins->dreg, src2);
3532                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
3533                 }
3534                         break;
3535                 case OP_ISUBCC: {
3536                         CHECK_SRCDST_NCOM_I;
3537                         s390_slgr (code, ins->dreg, src2);
3538                 }
3539                         break;
3540                 case OP_ISUB: {
3541                         CHECK_SRCDST_NCOM_I;
3542                         s390_sgr  (code, ins->dreg, src2);
3543                 }
3544                         break;
3545                 case OP_ISBB: {
3546                         CHECK_SRCDST_NCOM_I;
3547                         s390_slbgr (code, ins->dreg, src2);
3548                 }
3549                         break;
3550                 case OP_ISUB_IMM: {
3551                         if (ins->dreg != ins->sreg1) {
3552                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3553                         }
3554                         if (s390_is_imm16 (-ins->inst_imm)) {
3555                                 s390_aghi (code, ins->dreg, -ins->inst_imm);
3556                         } else {
3557                                 s390_basr (code, s390_r13, 0);
3558                                 s390_j    (code, 4);
3559                                 s390_word (code, ins->inst_imm);
3560                                 s390_sgf  (code, ins->dreg, 0, s390_r13, 4);
3561                         }
3562                 }
3563                         break;
3564                 case OP_ISBB_IMM: {
3565                         s390_basr (code, s390_r13, 0);
3566                         s390_j    (code, 4);
3567                         s390_word (code, ins->inst_imm);
3568                         s390_slgf (code, ins->dreg, 0, s390_r13, 4);
3569                 }
3570                         break;
3571                 case OP_ISUB_OVF:
3572                 case OP_S390_ISUB_OVF: {
3573                         CHECK_SRCDST_NCOM;
3574                         s390_sr   (code, ins->dreg, src2);
3575                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3576                         s390_lgfr (code, ins->dreg, ins->dreg);
3577                 }
3578                         break;
3579                 case OP_ISUB_OVF_UN:
3580                 case OP_S390_ISUB_OVF_UN: {
3581                         CHECK_SRCDST_NCOM;
3582                         s390_slr  (code, ins->dreg, src2);
3583                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
3584                         s390_llgfr(code, ins->dreg, ins->dreg);
3585                 }
3586                         break;
3587                 case OP_LSUB_OVF:
3588                 case OP_S390_LSUB_OVF: {
3589                         CHECK_SRCDST_NCOM;
3590                         s390_sgr   (code, ins->dreg, src2);
3591                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3592                 }
3593                         break;
3594                 case OP_LSUB_OVF_UN:
3595                 case OP_S390_LSUB_OVF_UN: {
3596                         CHECK_SRCDST_NCOM;
3597                         s390_slgr  (code, ins->dreg, src2);
3598                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
3599                 }
3600                         break;
3601                 case OP_IAND: {
3602                         CHECK_SRCDST_NCOM_I;
3603                         s390_ngr (code, ins->dreg, src2);
3604                 }
3605                         break;
3606                 case OP_IAND_IMM: {
3607                         if (ins->dreg != ins->sreg1) {
3608                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3609                         }
3610                         if (s390_is_imm16 (ins->inst_imm)) {
3611                                 s390_lghi (code, s390_r0, ins->inst_imm);
3612                                 s390_ngr  (code, ins->dreg, s390_r0);
3613                         } else {
3614                                 s390_basr (code, s390_r13, 0);
3615                                 s390_j    (code, 6);
3616                                 s390_llong(code, ins->inst_imm);
3617                                 s390_ng   (code, ins->dreg, 0, s390_r13, 4);
3618                         }
3619                 }
3620                         break;
3621                 case OP_IDIV: {
3622                         s390_lgfr (code, s390_r0, ins->sreg1);
3623                         s390_srda (code, s390_r0, 0, 32);
3624                         s390_dr   (code, s390_r0, ins->sreg2);
3625                         s390_lgfr (code, ins->dreg, s390_r1);
3626                 }
3627                         break;
3628                 case OP_IDIV_UN: {
3629                         s390_lgfr (code, s390_r0, ins->sreg1);
3630                         s390_srdl (code, s390_r0, 0, 32);
3631                         s390_dlr  (code, s390_r0, ins->sreg2);
3632                         s390_lgfr (code, ins->dreg, s390_r1);
3633                 }
3634                         break;
3635                 case OP_IDIV_IMM: {
3636                         if (s390_is_imm16 (ins->inst_imm)) {
3637                                 s390_lghi (code, s390_r13, ins->inst_imm);
3638                                 s390_lgfr (code, s390_r0, ins->sreg1);
3639                         } else {
3640                                 s390_basr (code, s390_r13, 0);
3641                                 s390_j    (code, 4);
3642                                 s390_word (code, ins->inst_imm);
3643                                 s390_lgfr (code, s390_r0, ins->sreg1);
3644                                 s390_lgf  (code, s390_r13, 0, s390_r13, 4);
3645                         }
3646                         s390_srda (code, s390_r0, 0, 32);
3647                         s390_dr   (code, s390_r0, ins->sreg2);
3648                         s390_lgfr (code, ins->dreg, s390_r1);
3649                 }
3650                         break;
3651                 case OP_IREM: {
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_r0);
3656                         break;
3657                 case OP_IREM_UN:
3658                         s390_lgfr (code, s390_r0, ins->sreg1);
3659                         s390_srdl (code, s390_r0, 0, 32);
3660                         s390_dlr  (code, s390_r0, ins->sreg2);
3661                         s390_lgfr (code, ins->dreg, s390_r0);
3662                 }
3663                         break;
3664                 case OP_IREM_IMM: {
3665                         if (s390_is_imm16 (ins->inst_imm)) {
3666                                 s390_lghi (code, s390_r13, ins->inst_imm);
3667                                 s390_lgfr (code, s390_r0, ins->sreg1);
3668                         } else {
3669                                 s390_basr (code, s390_r13, 0);
3670                                 s390_j    (code, 4);
3671                                 s390_word (code, ins->inst_imm);
3672                                 s390_lgfr (code, s390_r0, ins->sreg1);
3673                                 s390_lgf  (code, s390_r13, 0, s390_r13, 4);
3674                         }
3675                         s390_srda (code, s390_r0, 0, 32);
3676                         s390_dr   (code, s390_r0, ins->sreg2);
3677                         s390_lgfr (code, ins->dreg, s390_r0);
3678                 }
3679                         break;
3680                 case OP_IOR: {
3681                         CHECK_SRCDST_COM_I;
3682                         s390_ogr (code, ins->dreg, src2);
3683                 }
3684                         break;
3685                 case OP_IOR_IMM: {
3686                         if (ins->dreg != ins->sreg1) {
3687                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3688                         }
3689                         if (s390_is_imm16 (ins->inst_imm)) {
3690                                 s390_lghi (code, s390_r0, ins->inst_imm);
3691                                 s390_ogr  (code, ins->dreg, s390_r0);
3692                         } else {
3693                                 s390_basr (code, s390_r13, 0);
3694                                 s390_j    (code, 6);
3695                                 s390_llong(code, ins->inst_imm);
3696                                 s390_og   (code, ins->dreg, 0, s390_r13, 4);
3697                         }
3698                 }
3699                         break;
3700                 case OP_IXOR: {
3701                         CHECK_SRCDST_COM_I;
3702                         s390_xgr (code, ins->dreg, src2);
3703                 }
3704                         break;
3705                 case OP_IXOR_IMM: {
3706                         if (ins->dreg != ins->sreg1) {
3707                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3708                         }
3709                         if (s390_is_imm16 (ins->inst_imm)) {
3710                                 s390_lghi (code, s390_r0, ins->inst_imm);
3711                                 s390_xgr  (code, ins->dreg, s390_r0);
3712                         } else {
3713                                 s390_basr (code, s390_r13, 0);
3714                                 s390_j    (code, 6);
3715                                 s390_llong(code, ins->inst_imm);
3716                                 s390_xg   (code, ins->dreg, 0, s390_r13, 4);
3717                         }
3718                 }
3719                         break;
3720                 case OP_ISHL: {
3721                         CHECK_SRCDST_NCOM;
3722                         s390_sll  (code, ins->dreg, src2, 0);
3723                 }
3724                         break;
3725                 case OP_ISHL_IMM: {
3726                         if (ins->sreg1 != ins->dreg) {
3727                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3728                         }
3729                         s390_sll (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3730                 }
3731                         break;
3732                 case OP_ISHR: {
3733                         CHECK_SRCDST_NCOM;
3734                         s390_sra (code, ins->dreg, src2, 0);
3735                 }
3736                         break;
3737                 case OP_ISHR_IMM: {
3738                         if (ins->sreg1 != ins->dreg) {
3739                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3740                         }
3741                         s390_sra (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3742                 }
3743                         break;
3744                 case OP_ISHR_UN_IMM: {
3745                         if (ins->sreg1 != ins->dreg) {
3746                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3747                         }
3748                         s390_srl (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3749                 }
3750                         break;
3751                 case OP_ISHR_UN: {
3752                         CHECK_SRCDST_NCOM;
3753                         s390_srl  (code, ins->dreg, src2, 0);
3754                 }
3755                         break;
3756                 case OP_INOT: {
3757                         if (ins->sreg1 != ins->dreg) {
3758                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3759                         }
3760                         s390_lghi (code, s390_r0, -1);
3761                         s390_xgr  (code, ins->dreg, s390_r0);
3762                 }
3763                         break;
3764                 case OP_INEG: {
3765                         s390_lcgr (code, ins->dreg, ins->sreg1);
3766                 }
3767                         break;
3768                 case OP_IMUL: {
3769                         CHECK_SRCDST_COM_I;
3770                         s390_msr (code, ins->dreg, src2);
3771                 }
3772                         break;
3773                 case OP_IMUL_IMM: {
3774                         if (ins->dreg != ins->sreg1) {
3775                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3776                         }
3777                         if (s390_is_imm16 (ins->inst_imm)) {
3778                                 s390_lghi (code, s390_r13, ins->inst_imm);
3779                         } else {
3780                                 s390_basr (code, s390_r13, 0);
3781                                 s390_j    (code, 4);
3782                                 s390_word (code, ins->inst_imm);
3783                                 s390_lgf  (code, s390_r13, 0, s390_r13, 4);
3784                         }
3785                         s390_msr  (code, ins->dreg, s390_r13);
3786                 }
3787                         break;
3788                 case OP_IMUL_OVF: {
3789                         short int *o[2];
3790                         s390_ltr  (code, s390_r1, ins->sreg1);
3791                         s390_jz   (code, 0); CODEPTR(code, o[0]);
3792                         s390_ltr  (code, s390_r0, ins->sreg2);
3793                         s390_jnz  (code, 6);
3794                         s390_lhi  (code, s390_r1, 0);
3795                         s390_j    (code, 0); CODEPTR(code, o[1]);
3796                         s390_xr   (code, s390_r0, s390_r1);
3797                         s390_msr  (code, s390_r1, ins->sreg2);
3798                         s390_xr   (code, s390_r0, s390_r1);
3799                         s390_srl  (code, s390_r0, 0, 31);
3800                         s390_ltr  (code, s390_r0, s390_r0);
3801                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3802                         PTRSLOT   (code, o[0]);
3803                         PTRSLOT   (code, o[1]);
3804                         s390_lgfr (code, ins->dreg, s390_r1);
3805                 }
3806                         break;
3807                 case OP_IMUL_OVF_UN: {
3808                         s390_lhi  (code, s390_r0, 0);
3809                         s390_lr   (code, s390_r1, ins->sreg1);
3810                         s390_mlr  (code, s390_r0, ins->sreg2);
3811                         s390_ltr  (code, s390_r0, s390_r0);
3812                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3813                         s390_lgfr (code, ins->dreg, s390_r1);
3814                 }
3815                         break;
3816                 case OP_ICONST:
3817                 case OP_I8CONST: {
3818                         if (s390_is_imm16(ins->inst_c0)) {
3819                                 s390_lghi (code, ins->dreg, ins->inst_c0);
3820                         } else {
3821                                 s390_basr (code, s390_r13, 0);
3822                                 s390_j    (code, 6);
3823                                 s390_llong(code, ins->inst_c0);
3824                                 s390_lg   (code, ins->dreg, 0, s390_r13, 4);
3825                         }
3826                 }
3827                         break;
3828                 case OP_AOTCONST: {
3829                         s390_basr (code, s390_r13, 0);
3830                         s390_j    (code, 6);
3831                         mono_add_patch_info (cfg, code - cfg->native_code,
3832                                 (MonoJumpInfoType)ins->inst_i1, ins->inst_p0);
3833                         s390_llong(code, 0);
3834                         s390_lg   (code,ins->dreg, 0, s390_r13, 4);
3835                 }
3836                         break;
3837                 case OP_JUMP_TABLE: {
3838                         mono_add_patch_info (cfg, code - cfg->native_code,
3839                                 (MonoJumpInfoType)ins->inst_i1, ins->inst_p0);
3840                         s390_basr  (code, s390_r13, 0);
3841                         s390_j     (code, 6);
3842                         s390_llong (code, 0);
3843                         s390_lg    (code, ins->dreg, 0, s390_r13, 4);
3844                 }
3845                         break;
3846                 case OP_MOVE:
3847                         if (ins->dreg != ins->sreg1) {
3848                                 s390_lgr (code, ins->dreg, ins->sreg1);
3849                         }
3850                         break;
3851                 case OP_LCONV_TO_I:
3852                 case OP_LCONV_TO_I8:
3853                 case OP_SEXT_I4:
3854                         s390_lgfr (code, ins->dreg, ins->sreg1);
3855                         break;
3856                 case OP_LCONV_TO_I4:
3857                         s390_lgfr (code, ins->dreg, ins->sreg1);
3858                         break;
3859                 case OP_LCONV_TO_U:
3860                 case OP_LCONV_TO_U8:
3861                 case OP_LCONV_TO_U4:
3862                 case OP_ZEXT_I4:
3863                         s390_llgfr (code, ins->dreg, ins->sreg1);
3864                         break;
3865                 case OP_LCONV_TO_OVF_U4:
3866                         s390_basr (code, s390_r13, 0);
3867                         s390_j    (code, 6);
3868                         s390_llong(code, 4294967295);
3869                         s390_clg  (code, ins->sreg1, 0, s390_r13, 4);
3870                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GT, "OverflowException");
3871                         s390_ltgr (code, ins->sreg1, ins->sreg1);
3872                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, "OverflowException");
3873                         s390_llgfr(code, ins->dreg, ins->sreg1);
3874                         break;
3875                 case OP_LCONV_TO_OVF_I4_UN:
3876                         s390_basr (code, s390_r13, 0);
3877                         s390_j    (code, 6);
3878                         s390_llong(code, 2147483647);
3879                         s390_cg   (code, ins->sreg1, 0, s390_r13, 4);
3880                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GT, "OverflowException");
3881                         s390_ltgr (code, ins->sreg1, ins->sreg1);
3882                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, "OverflowException");
3883                         s390_lgfr (code, ins->dreg, ins->sreg1);
3884                         break;
3885                 case OP_FMOVE:
3886                 case OP_FCONV_TO_R4: {
3887                         if (ins->dreg != ins->sreg1) {
3888                                 s390_ldr   (code, ins->dreg, ins->sreg1);
3889                         }
3890                 }
3891                         break;
3892                 case OP_S390_SETF4RET: {
3893                         s390_ledbr (code, ins->dreg, ins->sreg1);
3894                 }
3895                         break;
3896                 case OP_JMP: {
3897                         if (cfg->method->save_lmf)
3898                                 restoreLMF(code, cfg->frame_reg, cfg->stack_usage);
3899
3900                         if (cfg->flags & MONO_CFG_HAS_TAIL) {
3901                                 code =  emit_load_volatile_arguments (code, cfg);
3902                         }
3903
3904                         code = backUpStackPtr(cfg, code);
3905                         s390_lg  (code, s390_r14, 0, STK_BASE, S390_RET_ADDR_OFFSET);
3906                         mono_add_patch_info (cfg, code - cfg->native_code,
3907                                              MONO_PATCH_INFO_METHOD_JUMP,
3908                                              ins->inst_p0);
3909                         s390_jcl (code, S390_CC_UN, 0);
3910                 }
3911                         break;
3912                 case OP_CHECK_THIS: {
3913                         /* ensure ins->sreg1 is not NULL */
3914                         s390_lg   (code, s390_r0, 0, ins->sreg1, 0);
3915                         s390_ltgr (code, s390_r0, s390_r0);
3916                 }
3917                         break;
3918                 case OP_ARGLIST: {
3919                         int offset = cfg->sig_cookie + cfg->stack_usage;
3920
3921                         if (s390_is_imm16 (offset))
3922                                 s390_lghi (code, s390_r0, offset);
3923                         else {
3924                                 s390_basr (code, s390_r13, 0);
3925                                 s390_j    (code, 6);
3926                                 s390_llong(code, offset);
3927                                 s390_lg   (code, s390_r0, 0, s390_r13, 0);
3928                         }
3929                         s390_agr  (code, s390_r0, cfg->frame_reg);
3930                         s390_stg  (code, s390_r0, 0, ins->sreg1, 0);
3931                 }
3932                         break;
3933                 case OP_FCALL: {
3934                         s390_basr (code, s390_r13, 0);
3935                         s390_j    (code, 6);
3936                         call = (MonoCallInst*)ins;
3937                         if (ins->flags & MONO_INST_HAS_METHOD)
3938                                 mono_add_patch_info (cfg, code-cfg->native_code,
3939                                                      MONO_PATCH_INFO_METHOD,
3940                                                      call->method);
3941                         else
3942                                 mono_add_patch_info (cfg, code-cfg->native_code,
3943                                                      MONO_PATCH_INFO_ABS,
3944                                                      call->fptr);
3945                         s390_llong(code, 0);
3946                         s390_lg   (code, s390_r14, 0, s390_r13, 4);
3947                         s390_basr (code, s390_r14, s390_r14);
3948                         if (call->signature->ret->type == MONO_TYPE_R4)
3949                                 s390_ldebr (code, s390_f0, s390_f0);
3950                 }
3951                         break;
3952                 case OP_LCALL:
3953                 case OP_VCALL:
3954                 case OP_VCALL2:
3955                 case OP_VOIDCALL:
3956                 case OP_CALL: {
3957                         s390_basr (code, s390_r13, 0);
3958                         s390_j    (code, 6);
3959                         call = (MonoCallInst*)ins;
3960                         if (ins->flags & MONO_INST_HAS_METHOD)
3961                                 mono_add_patch_info (cfg, code-cfg->native_code,
3962                                                      MONO_PATCH_INFO_METHOD,
3963                                                      call->method);
3964                         else
3965                                 mono_add_patch_info (cfg, code-cfg->native_code,
3966                                                      MONO_PATCH_INFO_ABS,
3967                                                      call->fptr);
3968                         s390_llong(code, 0);
3969                         s390_lg   (code, s390_r14, 0, s390_r13, 4);
3970                         s390_basr (code, s390_r14, s390_r14);
3971                 }
3972                         break;
3973                 case OP_FCALL_REG: {
3974                         call = (MonoCallInst*)ins;
3975                         s390_lgr  (code, s390_r1, ins->sreg1);
3976                         s390_basr (code, s390_r14, s390_r1);
3977                         if (call->signature->ret->type == MONO_TYPE_R4)
3978                                 s390_ldebr (code, s390_f0, s390_f0);
3979                 }
3980                         break;
3981                 case OP_LCALL_REG:
3982                 case OP_VCALL_REG:
3983                 case OP_VCALL2_REG:
3984                 case OP_VOIDCALL_REG:
3985                 case OP_CALL_REG: {
3986                         s390_lgr  (code, s390_r1, ins->sreg1);
3987                         s390_basr (code, s390_r14, s390_r1);
3988                 }
3989                         break;
3990                 case OP_FCALL_MEMBASE: {
3991                         call = (MonoCallInst*)ins;
3992                         s390_lg   (code, s390_r1, 0, ins->sreg1, ins->inst_offset);
3993                         s390_basr (code, s390_r14, s390_r1);
3994                         if (call->signature->ret->type == MONO_TYPE_R4)
3995                                 s390_ldebr (code, s390_f0, s390_f0);
3996                 }
3997                         break;
3998                 case OP_LCALL_MEMBASE:
3999                 case OP_VCALL_MEMBASE:
4000                 case OP_VCALL2_MEMBASE:
4001                 case OP_VOIDCALL_MEMBASE:
4002                 case OP_CALL_MEMBASE: {
4003                         s390_lg   (code, s390_r1, 0, ins->sreg1, ins->inst_offset);
4004                         s390_basr (code, s390_r14, s390_r1);
4005                 }
4006                         break;
4007                 case OP_LOCALLOC: {
4008                         int alloca_skip;
4009                         int area_offset;
4010
4011                         if (cfg->param_area == 0)
4012                                 alloca_skip = S390_MINIMAL_STACK_SIZE;
4013                         else
4014                                 alloca_skip = cfg->param_area;
4015
4016                         area_offset = S390_ALIGN(alloca_skip, S390_STACK_ALIGNMENT);
4017                         s390_lgr  (code, s390_r1, ins->sreg1);
4018                         if (ins->flags & MONO_INST_INIT)
4019                                 s390_lgr  (code, s390_r0, ins->sreg1);
4020                         s390_aghi (code, s390_r1, 14);
4021                         s390_srlg (code, s390_r1, s390_r1, 0, 3);
4022                         s390_sllg (code, s390_r1, s390_r1, 0, 3);
4023                         if (cfg->method->save_lmf) {
4024                                 /*----------------------------------*/
4025                                 /* we have to adjust lmf ebp value  */
4026                                 /*----------------------------------*/
4027                                 int lmfOffset = cfg->stack_usage - sizeof(MonoLMF);
4028
4029                                 s390_lgr (code, s390_r13, cfg->frame_reg);
4030                                 if (s390_is_imm16(lmfOffset))
4031                                         s390_aghi (code, s390_r13, lmfOffset);
4032                                 else {
4033                                         s390_basr (code, s390_r14, 0);
4034                                         s390_j    (code, 4);
4035                                         s390_word (code, lmfOffset);
4036                                         s390_agf  (code, s390_r13, 0, s390_r14, 4);
4037                                 }
4038                                 s390_lgr (code, s390_r14, STK_BASE);
4039                                 s390_sgr (code, s390_r14, s390_r1);
4040                                 s390_stg (code, s390_r14, 0, s390_r13,
4041                                           G_STRUCT_OFFSET(MonoLMF, ebp));
4042                         }
4043                         s390_lg   (code, s390_r13, 0, STK_BASE, 0);
4044                         s390_sgr  (code, STK_BASE, s390_r1);
4045                         s390_stg  (code, s390_r13, 0, STK_BASE, 0);
4046                         s390_la   (code, ins->dreg, 0, STK_BASE, area_offset);
4047                         s390_srlg (code, ins->dreg, ins->dreg, 0, 3);
4048                         s390_sllg (code, ins->dreg, ins->dreg, 0, 3);
4049                         if (ins->flags & MONO_INST_INIT) {
4050                                 s390_lgr  (code, s390_r1, s390_r0);
4051                                 s390_lgr  (code, s390_r0, ins->dreg);
4052                                 s390_lgr  (code, s390_r14, s390_r12);
4053                                 s390_lghi (code, s390_r13, 0);
4054                                 s390_mvcle(code, s390_r0, s390_r12, 0, 0);
4055                                 s390_jo   (code, -2);
4056                                 s390_lgr  (code, s390_r12, s390_r14);
4057                         }
4058                 }
4059                         break;
4060                 case OP_THROW: {
4061                         s390_lgr  (code, s390_r2, ins->sreg1);
4062                         s390_basr (code, s390_r13, 0);
4063                         s390_j    (code, 6);
4064                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD,
4065                                              (gpointer) "mono_arch_throw_exception");
4066                         s390_llong(code, 0);
4067                         s390_lg   (code, s390_r14, 0, s390_r13, 4);
4068                         s390_basr (code, s390_r14, s390_r14);
4069                 }
4070                         break;
4071                 case OP_RETHROW: {
4072                         s390_lgr  (code, s390_r2, ins->sreg1);
4073                         s390_basr (code, s390_r13, 0);
4074                         s390_j    (code, 6);
4075                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD,
4076                                              (gpointer) "mono_arch_rethrow_exception");
4077                         s390_llong(code, 0);
4078                         s390_lg   (code, s390_r14, 0, s390_r13, 4);
4079                         s390_basr (code, s390_r14, s390_r14);
4080                 }
4081                         break;
4082                 case OP_START_HANDLER: {
4083                         MonoInst *spvar = mono_find_spvar_for_region (cfg, bb->region);
4084
4085                         S390_LONG (code, stg, stg, s390_r14, 0,
4086                                    spvar->inst_basereg,
4087                                    spvar->inst_offset);
4088                 }
4089                         break;
4090                 case OP_ENDFILTER: {
4091                         MonoInst *spvar = mono_find_spvar_for_region (cfg, bb->region);
4092
4093                         if (ins->sreg1 != s390_r2)
4094                                 s390_lgr(code, s390_r2, ins->sreg1);
4095                         S390_LONG (code, lg, lg, s390_r14, 0,
4096                                    spvar->inst_basereg,
4097                                    spvar->inst_offset);
4098                         s390_br  (code, s390_r14);
4099                 }
4100                         break;
4101                 case OP_ENDFINALLY: {
4102                         MonoInst *spvar = mono_find_spvar_for_region (cfg, bb->region);
4103
4104                         S390_LONG (code, lg, lg, s390_r14, 0,
4105                                    spvar->inst_basereg,
4106                                    spvar->inst_offset);
4107                         s390_br  (code, s390_r14);
4108                 }
4109                         break;
4110                 case OP_CALL_HANDLER: {
4111                         mono_add_patch_info (cfg, code-cfg->native_code,
4112                                              MONO_PATCH_INFO_BB, ins->inst_target_bb);
4113                         s390_brasl (code, s390_r14, 0);
4114                         mono_cfg_add_try_hole (cfg, ins->inst_eh_block, code, bb);
4115                 }
4116                         break;
4117                 case OP_LABEL: {
4118                         ins->inst_c0 = code - cfg->native_code;
4119                 }
4120                         break;
4121                 case OP_RELAXED_NOP:
4122                 case OP_NOP:
4123                 case OP_DUMMY_USE:
4124                 case OP_DUMMY_STORE:
4125                 case OP_NOT_REACHED:
4126                 case OP_NOT_NULL: {
4127                 }
4128                         break;
4129                 case OP_BR:
4130                         EMIT_UNCOND_BRANCH(ins);
4131                         break;
4132                 case OP_BR_REG: {
4133                         s390_br  (code, ins->sreg1);
4134                 }
4135                         break;
4136                 case OP_CEQ:
4137                 case OP_ICEQ:
4138                 case OP_LCEQ: {
4139                         s390_lghi(code, ins->dreg, 1);
4140                         s390_jz  (code, 4);
4141                         s390_lghi(code, ins->dreg, 0);
4142                 }
4143                         break;
4144                 case OP_CLT:
4145                 case OP_ICLT:
4146                 case OP_LCLT: {
4147                         s390_lghi(code, ins->dreg, 1);
4148                         s390_jl  (code, 4);
4149                         s390_lghi(code, ins->dreg, 0);
4150                 }
4151                         break;
4152                 case OP_CLT_UN:
4153                 case OP_ICLT_UN:
4154                 case OP_LCLT_UN: {
4155                         s390_lghi(code, ins->dreg, 1);
4156                         s390_jlo (code, 4);
4157                         s390_lghi(code, ins->dreg, 0);
4158                 }
4159                         break;
4160                 case OP_CGT:
4161                 case OP_ICGT:
4162                 case OP_LCGT: {
4163                         s390_lghi(code, ins->dreg, 1);
4164                         s390_jh  (code, 4);
4165                         s390_lghi(code, ins->dreg, 0);
4166                 }
4167                         break;
4168                 case OP_CGT_UN:
4169                 case OP_ICGT_UN:
4170                 case OP_LCGT_UN: {
4171                         s390_lghi(code, ins->dreg, 1);
4172                         s390_jho (code, 4);
4173                         s390_lghi(code, ins->dreg, 0);
4174                 }
4175                         break;
4176                 case OP_COND_EXC_EQ:
4177                 case OP_COND_EXC_IEQ:
4178                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_EQ, ins->inst_p1);
4179                         break;
4180                 case OP_COND_EXC_NE_UN:
4181                 case OP_COND_EXC_INE_UN:
4182                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NE, ins->inst_p1);
4183                         break;
4184                 case OP_COND_EXC_LT:
4185                 case OP_COND_EXC_ILT:
4186                 case OP_COND_EXC_LT_UN:
4187                 case OP_COND_EXC_ILT_UN:
4188                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, ins->inst_p1);
4189                         break;
4190                 case OP_COND_EXC_GT:
4191                 case OP_COND_EXC_IGT:
4192                 case OP_COND_EXC_GT_UN:
4193                 case OP_COND_EXC_IGT_UN:
4194                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GT, ins->inst_p1);
4195                         break;
4196                 case OP_COND_EXC_GE:
4197                 case OP_COND_EXC_IGE:
4198                 case OP_COND_EXC_GE_UN:
4199                 case OP_COND_EXC_IGE_UN:
4200                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GE, ins->inst_p1);
4201                         break;
4202                 case OP_COND_EXC_LE:
4203                 case OP_COND_EXC_ILE:
4204                 case OP_COND_EXC_LE_UN:
4205                 case OP_COND_EXC_ILE_UN:
4206                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LE, ins->inst_p1);
4207                         break;
4208                 case OP_COND_EXC_OV:
4209                 case OP_COND_EXC_IOV:
4210                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, ins->inst_p1);
4211                         break;
4212                 case OP_COND_EXC_NO:
4213                 case OP_COND_EXC_INO:
4214                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NO, ins->inst_p1);
4215                         break;
4216                 case OP_COND_EXC_C:
4217                 case OP_COND_EXC_IC:
4218                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, ins->inst_p1);
4219                         break;
4220                 case OP_COND_EXC_NC:
4221                 case OP_COND_EXC_INC:
4222                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, ins->inst_p1);
4223                         break;
4224                 case OP_LBEQ:
4225                 case OP_IBEQ:
4226                         EMIT_COND_BRANCH (ins, S390_CC_EQ);
4227                         break;
4228                 case OP_LBNE_UN:
4229                 case OP_IBNE_UN:
4230                         EMIT_COND_BRANCH (ins, S390_CC_NE);
4231                         break;
4232                 case OP_LBLT:
4233                 case OP_LBLT_UN:
4234                 case OP_IBLT:
4235                 case OP_IBLT_UN:
4236                         EMIT_COND_BRANCH (ins, S390_CC_LT);
4237                         break;
4238                 case OP_LBGT:
4239                 case OP_LBGT_UN:
4240                 case OP_IBGT:
4241                 case OP_IBGT_UN:
4242                         EMIT_COND_BRANCH (ins, S390_CC_GT);
4243                         break;
4244                 case OP_LBGE:
4245                 case OP_LBGE_UN:
4246                 case OP_IBGE:
4247                 case OP_IBGE_UN:
4248                         EMIT_COND_BRANCH (ins, S390_CC_GE);
4249                         break;
4250                 case OP_LBLE:
4251                 case OP_LBLE_UN:
4252                 case OP_IBLE:
4253                 case OP_IBLE_UN:
4254                         EMIT_COND_BRANCH (ins, S390_CC_LE);
4255                         break;
4256
4257                 /* floating point opcodes */
4258                 case OP_R8CONST: {
4259                         if (*((float *) ins->inst_p0) == 0) {
4260                                 s390_lzdr (code, ins->dreg);
4261                         } else {
4262                                 s390_basr  (code, s390_r13, 0);
4263                                 s390_j     (code, 6);
4264                                 s390_llong (code, ins->inst_p0);
4265                                 s390_lg    (code, s390_r13, 0, s390_r13, 4);
4266                                 s390_ld    (code, ins->dreg, 0, s390_r13, 0);
4267                         }
4268                 }
4269                         break;
4270                 case OP_R4CONST: {
4271                         if (*((float *) ins->inst_p0) == 0) {
4272                                 s390_lzdr (code, ins->dreg);
4273                         } else {
4274                                 s390_basr (code, s390_r13, 0);
4275                                 s390_j    (code, 6);
4276                                 s390_llong(code, ins->inst_p0);
4277                                 s390_lg   (code, s390_r13, 0, s390_r13, 4);
4278                                 s390_ldeb (code, ins->dreg, 0, s390_r13, 0);
4279                         }
4280                 }
4281                         break;
4282                 case OP_STORER8_MEMBASE_REG: {
4283                         S390_LONG (code, stdy, std, ins->sreg1, 0,
4284                                    ins->inst_destbasereg, ins->inst_offset);
4285                 }
4286                         break;
4287                 case OP_LOADR8_MEMBASE: {
4288                         S390_LONG (code, ldy, ld, ins->dreg, 0,
4289                                    ins->inst_basereg, ins->inst_offset);
4290                 }
4291                         break;
4292                 case OP_STORER4_MEMBASE_REG: {
4293                         s390_ledbr (code, s390_f15, ins->sreg1);
4294                         S390_LONG (code, stey, ste, s390_f15, 0,
4295                                    ins->inst_destbasereg, ins->inst_offset);
4296                 }
4297                         break;
4298                 case OP_LOADR4_MEMBASE: {
4299                         S390_LONG (code, ldy, ld, s390_f15, 0,
4300                                    ins->inst_basereg, ins->inst_offset);
4301                         s390_ldebr (code, ins->dreg, s390_f15);
4302                 }
4303                         break;
4304                 case OP_ICONV_TO_R_UN: {
4305                         s390_cdfbr (code, ins->dreg, ins->sreg1);
4306                         s390_ltr   (code, ins->sreg1, ins->sreg1);
4307                         s390_jnl   (code, 12);
4308                         s390_basr  (code, s390_r13, 0);
4309                         s390_j     (code, 6);
4310                         s390_word  (code, 0x41f00000);
4311                         s390_word  (code, 0);
4312                         s390_adb   (code, ins->dreg, 0, s390_r13, 4);
4313                 }
4314                         break;
4315                 case OP_LCONV_TO_R_UN: {
4316                         s390_cdgbr (code, ins->dreg, ins->sreg1);
4317                         s390_ltgr  (code, ins->sreg1, ins->sreg1);
4318                         s390_jnl   (code, 12);
4319                         s390_basr  (code, s390_r13, 0);
4320                         s390_j     (code, 6);
4321                         s390_word  (code, 0x41f00000);
4322                         s390_word  (code, 0);
4323                         s390_adb   (code, ins->dreg, 0, s390_r13, 4);
4324                 }
4325                         break;
4326                 case OP_LCONV_TO_R4:
4327                 case OP_ICONV_TO_R4: {
4328                         s390_cdgbr (code, ins->dreg, ins->sreg1);
4329                 }
4330                         break;
4331                 case OP_LCONV_TO_R8:
4332                 case OP_ICONV_TO_R8: {
4333                         s390_cdgbr (code, ins->dreg, ins->sreg1);
4334                 }
4335                         break;
4336                 case OP_FCONV_TO_I1:
4337                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 1, TRUE);
4338                         break;
4339                 case OP_FCONV_TO_U1:
4340                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 1, FALSE);
4341                         break;
4342                 case OP_FCONV_TO_I2:
4343                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 2, TRUE);
4344                         break;
4345                 case OP_FCONV_TO_U2:
4346                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 2, FALSE);
4347                         break;
4348                 case OP_FCONV_TO_I4:
4349                 case OP_FCONV_TO_I:
4350                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 4, TRUE);
4351                         break;
4352                 case OP_FCONV_TO_U4:
4353                 case OP_FCONV_TO_U:
4354                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 4, FALSE);
4355                         break;
4356                 case OP_FCONV_TO_I8:
4357                         s390_cgdbr (code, ins->dreg, 5, ins->sreg1);
4358                         break;
4359                 case OP_LCONV_TO_OVF_I: {
4360                         /* Valid ints: 0xffffffff:8000000 to 00000000:0x7f000000 */
4361                         short int *o[5];
4362                         s390_ltgr (code, ins->sreg2, ins->sreg2);
4363                         s390_jnl  (code, 0); CODEPTR(code, o[0]);
4364                         s390_ltgr (code, ins->sreg1, ins->sreg1);
4365                         s390_jnl  (code, 0); CODEPTR(code, o[1]);
4366                         s390_lhi  (code, s390_r13, -1);
4367                         s390_cgr  (code, ins->sreg1, s390_r13);
4368                         s390_jnz  (code, 0); CODEPTR(code, o[2]);
4369                         if (ins->dreg != ins->sreg2)
4370                                 s390_lgr  (code, ins->dreg, ins->sreg2);
4371                         s390_j    (code, 0); CODEPTR(code, o[3]);
4372                         PTRSLOT(code, o[0]);
4373                         s390_jz   (code, 0); CODEPTR(code, o[4]);
4374                         PTRSLOT(code, o[1]);
4375                         PTRSLOT(code, o[2]);
4376                         mono_add_patch_info (cfg, code - cfg->native_code,
4377                                              MONO_PATCH_INFO_EXC, "OverflowException");
4378                         s390_brasl (code, s390_r14, 0);
4379                         PTRSLOT(code, o[3]);
4380                         PTRSLOT(code, o[4]);
4381                 }
4382                         break;
4383                 case OP_ABS: {
4384                         s390_lpdbr (code, ins->dreg, ins->sreg1);
4385                 }
4386                         break;
4387                 case OP_SQRT: {
4388                         s390_sqdbr (code, ins->dreg, ins->sreg1);
4389                 }
4390                         break;
4391                 case OP_FADD: {
4392                         CHECK_SRCDST_COM_F;
4393                         s390_adbr (code, ins->dreg, src2);
4394                 }
4395                         break;
4396                 case OP_FSUB: {
4397                         CHECK_SRCDST_NCOM_F;
4398                         s390_sdbr (code, ins->dreg, src2);
4399                 }
4400                         break;
4401                 case OP_FMUL: {
4402                         CHECK_SRCDST_COM_F;
4403                         s390_mdbr (code, ins->dreg, src2);
4404                 }
4405                         break;
4406                 case OP_FDIV: {
4407                         CHECK_SRCDST_NCOM_F;
4408                         s390_ddbr (code, ins->dreg, src2);
4409                 }
4410                         break;
4411                 case OP_FNEG: {
4412                         s390_lcdbr (code, ins->dreg, ins->sreg1);
4413                 }
4414                         break;
4415                 case OP_FREM: {
4416                         CHECK_SRCDST_NCOM_F;
4417                         s390_didbr (code, ins->dreg, src2, 5, s390_f15);
4418                 }
4419                         break;
4420                 case OP_FCOMPARE: {
4421                         s390_cdbr (code, ins->sreg1, ins->sreg2);
4422                 }
4423                         break;
4424                 case OP_FCEQ: {
4425                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4426                         s390_lghi  (code, ins->dreg, 1);
4427                         s390_je    (code, 4);
4428                         s390_lghi  (code, ins->dreg, 0);
4429                 }
4430                         break;
4431                 case OP_FCLT: {
4432                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4433                         s390_lghi  (code, ins->dreg, 1);
4434                         s390_jl    (code, 4);
4435                         s390_lghi  (code, ins->dreg, 0);
4436                 }
4437                         break;
4438                 case OP_FCLT_UN: {
4439                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4440                         s390_lghi  (code, ins->dreg, 1);
4441                         s390_jlo   (code, 4);
4442                         s390_lghi  (code, ins->dreg, 0);
4443                 }
4444                         break;
4445                 case OP_FCGT: {
4446                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4447                         s390_lghi  (code, ins->dreg, 1);
4448                         s390_jh    (code, 4);
4449                         s390_lghi  (code, ins->dreg, 0);
4450                 }
4451                         break;
4452                 case OP_FCGT_UN: {
4453                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4454                         s390_lghi  (code, ins->dreg, 1);
4455                         s390_jho   (code, 4);
4456                         s390_lghi  (code, ins->dreg, 0);
4457                 }
4458                         break;
4459                 case OP_FBEQ: {
4460                         short *o;
4461                         s390_jo (code, 0); CODEPTR(code, o);
4462                         EMIT_COND_BRANCH (ins, S390_CC_EQ);
4463                         PTRSLOT (code, o);
4464                 }
4465                         break;
4466                 case OP_FBNE_UN:
4467                         EMIT_COND_BRANCH (ins, S390_CC_NE|S390_CC_OV);
4468                         break;
4469                 case OP_FBLT: {
4470                         short *o;
4471                         s390_jo (code, 0); CODEPTR(code, o);
4472                         EMIT_COND_BRANCH (ins, S390_CC_LT);
4473                         PTRSLOT (code, o);
4474                 }
4475                         break;
4476                 case OP_FBLT_UN:
4477                         EMIT_COND_BRANCH (ins, S390_CC_LT|S390_CC_OV);
4478                         break;
4479                 case OP_FBGT: {
4480                         short *o;
4481                         s390_jo (code, 0); CODEPTR(code, o);
4482                         EMIT_COND_BRANCH (ins, S390_CC_GT);
4483                         PTRSLOT (code, o);
4484                 }
4485                         break;
4486                 case OP_FBGT_UN:
4487                         EMIT_COND_BRANCH (ins, S390_CC_GT|S390_CC_OV);
4488                         break;
4489                 case OP_FBGE: {
4490                         short *o;
4491                         s390_jo (code, 0); CODEPTR(code, o);
4492                         EMIT_COND_BRANCH (ins, S390_CC_GE);
4493                         PTRSLOT (code, o);
4494                 }
4495                         break;
4496                 case OP_FBGE_UN:
4497                         EMIT_COND_BRANCH (ins, S390_CC_GE|S390_CC_OV);
4498                         break;
4499                 case OP_FBLE: {
4500                         short *o;
4501                         s390_jo (code, 0); CODEPTR(code, o);
4502                         EMIT_COND_BRANCH (ins, S390_CC_LE);
4503                         PTRSLOT (code, o);
4504                 }
4505                         break;
4506                 case OP_FBLE_UN:
4507                         EMIT_COND_BRANCH (ins, S390_CC_LE|S390_CC_OV);
4508                         break;
4509                 case OP_CKFINITE: {
4510                         short *o;
4511                         s390_lhi  (code, s390_r13, 0x7f);
4512                         s390_tcdb (code, ins->sreg1, 0, s390_r13, 0);
4513                         s390_jz   (code, 0); CODEPTR(code, o);
4514                         mono_add_patch_info (cfg, code - cfg->native_code,
4515                                              MONO_PATCH_INFO_EXC, "ArithmeticException");
4516                         s390_brasl (code, s390_r14,0);
4517                         PTRSLOT(code, o);
4518                 }
4519                         break;
4520                 case OP_S390_MOVE: {
4521                         if (ins->backend.size > 0) {
4522                                 if (ins->backend.size <= 256) {
4523                                         s390_mvc  (code, ins->backend.size, ins->dreg,
4524                                                    ins->inst_offset, ins->sreg1, ins->inst_imm);
4525                                 } else {
4526                                         s390_lgr  (code, s390_r0, ins->dreg);
4527                                         if (ins->inst_offset > 0) {
4528                                                 if (s390_is_imm16 (ins->inst_offset)) {
4529                                                         s390_aghi (code, s390_r0, ins->inst_offset);
4530                                                 } else {
4531                                                         s390_basr (code, s390_r13, 0);
4532                                                         s390_j    (code, 6);
4533                                                         s390_llong(code, ins->inst_offset);
4534                                                         s390_ag   (code, s390_r0, 0, s390_r13, 4);
4535                                                 }
4536                                         }
4537                                         s390_lgr  (code, s390_r12, ins->sreg1);
4538                                         if (ins->inst_imm > 0) {
4539                                                 if (s390_is_imm16 (ins->inst_imm)) {
4540                                                         s390_aghi (code, s390_r12, ins->inst_imm);
4541                                                 } else {
4542                                                         s390_basr (code, s390_r13, 0);
4543                                                         s390_j    (code, 6);
4544                                                         s390_llong(code, ins->inst_imm);
4545                                                         s390_ag   (code, s390_r12, 0, s390_r13, 4);
4546                                                 }
4547                                         }
4548                                         if (s390_is_imm16 (ins->backend.size)) {
4549                                                 s390_lghi (code, s390_r1, ins->backend.size);
4550                                         } else {
4551                                                 s390_basr (code, s390_r13, 0);
4552                                                 s390_j    (code, 6);
4553                                                 s390_llong(code, ins->backend.size);
4554                                                 s390_lg   (code, s390_r1, 0, s390_r13, 4);
4555                                         }
4556                                         s390_lgr  (code, s390_r13, s390_r1);
4557                                         s390_mvcle(code, s390_r0, s390_r12, 0, 0);
4558                                         s390_jo   (code, -2);
4559                                 }
4560                         }
4561                 }
4562                         break;
4563                 case OP_ATOMIC_ADD_I8: {
4564                         s390_lgr (code, s390_r1, ins->sreg2);
4565                         s390_lg  (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4566                         s390_agr (code, s390_r1, s390_r0);
4567                         s390_csg (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
4568                         s390_jnz (code, -10);
4569                         s390_lgr (code, ins->dreg, s390_r1);
4570                 }
4571                         break;
4572                 case OP_ATOMIC_ADD_NEW_I8: {
4573                         s390_lgr (code, s390_r1, ins->sreg2);
4574                         s390_lg  (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4575                         s390_agr (code, s390_r1, s390_r0);
4576                         s390_csg (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
4577                         s390_jnz (code, -10);
4578                         s390_lgr (code, ins->dreg, s390_r1);
4579                 }
4580                         break;
4581                 case OP_ATOMIC_EXCHANGE_I8: {
4582                         s390_lg  (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4583                         s390_csg (code, s390_r0, ins->sreg2, ins->inst_basereg, ins->inst_offset);
4584                         s390_jnz (code, -6);
4585                         s390_lgr (code, ins->dreg, s390_r0);
4586                 }
4587                         break;
4588                 case OP_ATOMIC_ADD_I4: {
4589                         s390_lgfr(code, s390_r1, ins->sreg2);
4590                         s390_lgf (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4591                         s390_agr (code, s390_r1, s390_r0);
4592                         s390_cs  (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
4593                         s390_jnz (code, -9);
4594                         s390_lgfr(code, ins->dreg, s390_r1);
4595                 }
4596                         break;
4597                 case OP_ATOMIC_ADD_NEW_I4: {
4598                         s390_lgfr(code, s390_r1, ins->sreg2);
4599                         s390_lgf (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4600                         s390_agr (code, s390_r1, s390_r0);
4601                         s390_cs  (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
4602                         s390_jnz (code, -9);
4603                         s390_lgfr(code, ins->dreg, s390_r1);
4604                 }
4605                         break;
4606                 case OP_ATOMIC_EXCHANGE_I4: {
4607                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4608                         s390_cs  (code, s390_r0, ins->sreg2, ins->inst_basereg, ins->inst_offset);
4609                         s390_jnz (code, -4);
4610                         s390_lgfr(code, ins->dreg, s390_r0);
4611                 }
4612                         break;
4613                 case OP_S390_BKCHAIN: {
4614                         s390_lgr  (code, ins->dreg, ins->sreg1);
4615                         if (s390_is_imm16 (cfg->stack_offset)) {
4616                                 s390_aghi (code, ins->dreg, cfg->stack_offset);
4617                         } else {
4618                                 s390_basr (code, s390_r13, 0);
4619                                 s390_j    (code, 6);
4620                                 s390_llong(code, cfg->stack_offset);
4621                                 s390_ag   (code, ins->dreg, 0, s390_r13, 4);
4622                         }
4623                 }
4624                         break;
4625                 case OP_MEMORY_BARRIER: {
4626                 }
4627                         break;
4628                 default:
4629                         g_warning ("unknown opcode %s in %s()\n", mono_inst_name (ins->opcode), __FUNCTION__);
4630                         g_assert_not_reached ();
4631                 }
4632
4633                 if ((cfg->opt & MONO_OPT_BRANCH) && ((code - cfg->native_code - offset) > max_len)) {
4634                         g_warning ("wrong maximal instruction length of instruction %s (expected %d, got %ld)",
4635                                    mono_inst_name (ins->opcode), max_len, code - cfg->native_code - offset);
4636                         g_assert_not_reached ();
4637                 }
4638
4639                 cpos += max_len;
4640
4641                 last_offset = offset;
4642         }
4643
4644         cfg->code_len = code - cfg->native_code;
4645 }
4646
4647 /*========================= End of Function ========================*/
4648
4649 /*------------------------------------------------------------------*/
4650 /*                                                                  */
4651 /* Name         - mono_arch_register_lowlevel_calls                 */
4652 /*                                                                  */
4653 /* Function     - Register routines to help with --trace operation. */
4654 /*                                                                  */
4655 /*------------------------------------------------------------------*/
4656
4657 void
4658 mono_arch_register_lowlevel_calls (void)
4659 {
4660         mono_register_jit_icall (mono_arch_get_lmf_addr, "mono_arch_get_lmf_addr", NULL, TRUE);
4661 }
4662
4663 /*========================= End of Function ========================*/
4664
4665 /*------------------------------------------------------------------*/
4666 /*                                                                  */
4667 /* Name         - mono_arch_patch_code                              */
4668 /*                                                                  */
4669 /* Function     - Process the patch data created during the         */
4670 /*                instruction build process. This resolves jumps,   */
4671 /*                calls, variables etc.                             */
4672 /*                                                                  */
4673 /*------------------------------------------------------------------*/
4674
4675 void
4676 mono_arch_patch_code (MonoMethod *method, MonoDomain *domain,
4677                       guint8 *code, MonoJumpInfo *ji, gboolean run_cctors)
4678 {
4679         MonoJumpInfo *patch_info;
4680
4681         for (patch_info = ji; patch_info; patch_info = patch_info->next) {
4682                 unsigned char *ip = patch_info->ip.i + code;
4683                 gconstpointer target = NULL;
4684
4685                 target = mono_resolve_patch_target (method, domain, code,
4686                                                     patch_info, run_cctors);
4687
4688                 switch (patch_info->type) {
4689                         case MONO_PATCH_INFO_IP:
4690                         case MONO_PATCH_INFO_EXC_NAME:
4691                         case MONO_PATCH_INFO_LDSTR:
4692                         case MONO_PATCH_INFO_TYPE_FROM_HANDLE:
4693                         case MONO_PATCH_INFO_LDTOKEN:
4694                         case MONO_PATCH_INFO_EXC:
4695                         case MONO_PATCH_INFO_ABS:
4696                         case MONO_PATCH_INFO_METHOD:
4697                         case MONO_PATCH_INFO_INTERNAL_METHOD:
4698                         case MONO_PATCH_INFO_CLASS_INIT:
4699                                 s390_patch_addr (ip, (guint64) target);
4700                                 continue;
4701                         case MONO_PATCH_INFO_SWITCH:
4702                                 /*----------------------------------*/
4703                                 /* ip points at the basr r13,0/j +4 */
4704                                 /* instruction the vtable value     */
4705                                 /* follows this (i.e. ip+6)         */
4706                                 /*----------------------------------*/
4707                                 *((gconstpointer *)(ip+6)) = target;
4708                                 continue;
4709                         case MONO_PATCH_INFO_METHODCONST:
4710                         case MONO_PATCH_INFO_CLASS:
4711                         case MONO_PATCH_INFO_IMAGE:
4712                         case MONO_PATCH_INFO_FIELD:
4713                         case MONO_PATCH_INFO_IID:
4714                                 target = S390_RELATIVE(target, ip);
4715                                 s390_patch_rel (ip, (guint64) target);
4716                                 continue;
4717                         case MONO_PATCH_INFO_R4:
4718                         case MONO_PATCH_INFO_R8:
4719                         case MONO_PATCH_INFO_METHOD_REL:
4720                                 g_assert_not_reached ();
4721                                 continue;
4722                         default:
4723                                 target = S390_RELATIVE(target, ip);
4724                                 ip += 2;
4725                                 s390_patch_rel (ip, (guint64) target);
4726                 }
4727         }
4728 }
4729
4730 /*========================= End of Function ========================*/
4731
4732 /*------------------------------------------------------------------*/
4733 /*                                                                  */
4734 /* Name         - emit_load_volatile_arguments                      */
4735 /*                                                                  */
4736 /* Function     - Emit the instructions to reload parameter regist- */
4737 /*                registers for use with "tail" operations.         */
4738 /*                                                                  */
4739 /*                The register loading operations performed here    */
4740 /*                are the mirror of the store operations performed  */
4741 /*                in mono_arch_emit_prolog and need to be kept in   */
4742 /*                synchronization with it.                          */
4743 /*                                                                  */
4744 /*------------------------------------------------------------------*/
4745
4746 guint8 *
4747 emit_load_volatile_arguments (guint8 *code, MonoCompile *cfg)
4748 {
4749         MonoInst *inst;
4750         MonoMethod *method = cfg->method;
4751         MonoMethodSignature *sig = mono_method_signature(method);
4752         int pos = 0, i;
4753         CallInfo *cinfo;
4754
4755         cinfo = get_call_info (NULL, NULL, sig, sig->pinvoke);
4756
4757         if (cinfo->struct_ret) {
4758                 ArgInfo *ainfo = &cinfo->ret;
4759                 inst         = cfg->vret_addr;
4760                 s390_lg (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4761         }
4762
4763         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
4764                 ArgInfo *ainfo = cinfo->args + i;
4765                 inst = cfg->args [pos];
4766
4767                 if (inst->opcode == OP_REGVAR) {
4768                         if (ainfo->regtype == RegTypeGeneral)
4769                                 s390_lgr (code, ainfo->reg, inst->dreg);
4770                         else if (ainfo->regtype == RegTypeFP) {
4771                                 if (inst->dreg != ainfo->reg) {
4772                                         if (ainfo->size == 4) {
4773                                                 s390_ldebr (code, ainfo->reg, inst->dreg);
4774                                         } else {
4775                                                 s390_ldr   (code, ainfo->reg, inst->dreg);
4776                                         }
4777                                 }
4778                         }
4779                         else if (ainfo->regtype == RegTypeBase) {
4780                         } else
4781                                 g_assert_not_reached ();
4782                 } else {
4783                         if (ainfo->regtype == RegTypeGeneral) {
4784                                 if (!((ainfo->reg >= 2) && (ainfo->reg <= 6)))
4785                                         g_assert_not_reached();
4786                                 switch (ainfo->size) {
4787                                 case 1:
4788                                         s390_llgc (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4789                                         break;
4790                                 case 2:
4791                                         s390_lgh  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4792                                         break;
4793                                 case 4:
4794                                         s390_lgf (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4795                                         break;
4796                                 case 8:
4797                                         s390_lg  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4798                                         break;
4799                                 }
4800                         } else if (ainfo->regtype == RegTypeBase) {
4801                         } else if (ainfo->regtype == RegTypeFP) {
4802                                 if (ainfo->size == 8)
4803                                         s390_ld  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4804                                 else if (ainfo->size == 4)
4805                                         s390_le  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4806                                 else
4807                                         g_assert_not_reached ();
4808                         } else if (ainfo->regtype == RegTypeStructByVal) {
4809                                 if (ainfo->reg != STK_BASE) {
4810                                         switch (ainfo->size) {
4811                                         case 1:
4812                                                 s390_llgc (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4813                                                 break;
4814                                         case 2:
4815                                                 s390_lgh (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4816                                                 break;
4817                                         case 4:
4818                                                 s390_lgf (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4819                                                 break;
4820                                         case 8:
4821                                                 s390_lg  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4822                                                 break;
4823                                         }
4824                                 }
4825                         } else if (ainfo->regtype == RegTypeStructByAddr) {
4826                                 if (ainfo->reg != STK_BASE) {
4827                                         s390_lg (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4828                                 }
4829                         } else
4830                                 g_assert_not_reached ();
4831                 }
4832                 pos++;
4833         }
4834
4835         return code;
4836 }
4837
4838 /*========================= End of Function ========================*/
4839
4840 /*------------------------------------------------------------------*/
4841 /*                                                                  */
4842 /* Name         - mono_arch_emit_prolog                             */
4843 /*                                                                  */
4844 /* Function     - Create the instruction sequence for a function    */
4845 /*                prolog.                                           */
4846 /*                                                                  */
4847 /*------------------------------------------------------------------*/
4848
4849 guint8 *
4850 mono_arch_emit_prolog (MonoCompile *cfg)
4851 {
4852         MonoMethod *method = cfg->method;
4853         MonoBasicBlock *bb;
4854         MonoMethodSignature *sig;
4855         MonoInst *inst;
4856         int alloc_size, pos, max_offset, i;
4857         guint8 *code;
4858         CallInfo *cinfo;
4859         int tracing = 0;
4860         int lmfOffset;
4861
4862         cfg->code_size   = 512;
4863
4864         if (mono_jit_trace_calls != NULL && mono_trace_eval (method)) {
4865                 tracing         = 1;
4866                 cfg->code_size += 256;
4867         }
4868
4869         if (method->save_lmf)
4870                 cfg->code_size += 200;
4871
4872         cfg->native_code = code = g_malloc (cfg->code_size);
4873
4874         s390_stmg (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
4875
4876         if (cfg->arch.bkchain_reg != -1)
4877                 s390_lgr (code, cfg->arch.bkchain_reg, STK_BASE);
4878
4879         if (cfg->flags & MONO_CFG_HAS_ALLOCA) {
4880                 cfg->used_int_regs |= 1 << 11;
4881         }
4882
4883         alloc_size = cfg->stack_offset;
4884
4885         cfg->stack_usage = alloc_size;
4886         s390_lgr  (code, s390_r11, STK_BASE);
4887         if (s390_is_imm16 (alloc_size)) {
4888                 s390_aghi (code, STK_BASE, -alloc_size);
4889         } else {
4890                 int stackSize = alloc_size;
4891                 while (stackSize > 32767) {
4892                         s390_aghi (code, STK_BASE, -32767);
4893                         stackSize -= 32767;
4894                 }
4895                 s390_aghi (code, STK_BASE, -stackSize);
4896         }
4897         s390_stg  (code, s390_r11, 0, STK_BASE, 0);
4898
4899         if (cfg->frame_reg != STK_BASE)
4900                 s390_lgr (code, s390_r11, STK_BASE);
4901
4902         /* compute max_offset in order to use short forward jumps
4903          * we always do it on s390 because the immediate displacement
4904          * for jumps is too small
4905          */
4906         max_offset = 0;
4907         for (bb = cfg->bb_entry; bb; bb = bb->next_bb) {
4908                 MonoInst *ins;
4909                 bb->max_offset = max_offset;
4910
4911                 if (cfg->prof_options & MONO_PROFILE_COVERAGE)
4912                         max_offset += 6;
4913
4914                 MONO_BB_FOR_EACH_INS (bb, ins)
4915                         max_offset += ((guint8 *)ins_get_spec (ins->opcode))[MONO_INST_LEN];
4916         }
4917
4918         /* load arguments allocated to register from the stack */
4919         sig = mono_method_signature (method);
4920         pos = 0;
4921
4922         cinfo = get_call_info (cfg, cfg->mempool, sig, sig->pinvoke);
4923
4924         if (cinfo->struct_ret) {
4925                 ArgInfo *ainfo = &cinfo->ret;
4926                 inst         = cfg->vret_addr;
4927                 inst->backend.size = ainfo->vtsize;
4928                 s390_stg (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4929         }
4930
4931         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
4932                 ArgInfo *ainfo = cinfo->args + i;
4933                 inst = cfg->args [pos];
4934
4935                 if (inst->opcode == OP_VTARG_ADDR)
4936                         inst = inst->inst_left;
4937
4938                 if (inst->opcode == OP_REGVAR) {
4939                         if (ainfo->regtype == RegTypeGeneral)
4940                                 s390_lgr (code, inst->dreg, ainfo->reg);
4941                         else if (ainfo->regtype == RegTypeFP) {
4942                                 if (inst->dreg != ainfo->reg) {
4943                                         if (ainfo->size == 4) {
4944                                                 s390_ledbr (code, inst->dreg, ainfo->reg);
4945                                         } else {
4946                                                 s390_ldr   (code, inst->dreg, ainfo->reg);
4947                                         }
4948                                 }
4949                         }
4950                         else if (ainfo->regtype == RegTypeBase) {
4951                                 s390_lgr  (code, s390_r13, STK_BASE);
4952                                 s390_aghi (code, s390_r13, alloc_size);
4953                                 s390_lg   (code, inst->dreg, 0, s390_r13, ainfo->offset);
4954                         } else
4955                                 g_assert_not_reached ();
4956
4957                         if (cfg->verbose_level > 2)
4958                                 g_print ("Argument %d assigned to register %s\n",
4959                                          pos, mono_arch_regname (inst->dreg));
4960                 } else {
4961                         if (ainfo->regtype == RegTypeGeneral) {
4962                                 if (!((ainfo->reg >= 2) && (ainfo->reg <= 6)))
4963                                         g_assert_not_reached();
4964                                 switch (ainfo->size) {
4965                                 case 1:
4966                                         s390_stc (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4967                                         break;
4968                                 case 2:
4969                                         s390_sth (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4970                                         break;
4971                                 case 4:
4972                                         s390_st (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4973                                         break;
4974                                 case 8:
4975                                         s390_stg (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4976                                         break;
4977                                 }
4978                         } else if (ainfo->regtype == RegTypeBase) {
4979                         } else if (ainfo->regtype == RegTypeFP) {
4980                                 if (ainfo->size == 8)
4981                                         s390_std (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4982                                 else if (ainfo->size == 4)
4983                                         s390_ste (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4984                                 else
4985                                         g_assert_not_reached ();
4986                         } else if (ainfo->regtype == RegTypeStructByVal) {
4987                                 int doffset = inst->inst_offset;
4988                                 int reg;
4989                                 if (ainfo->reg != STK_BASE)
4990                                         reg = ainfo->reg;
4991                                 else {
4992                                         reg = s390_r0;
4993                                         s390_lgr  (code, s390_r13, STK_BASE);
4994                                         s390_aghi (code, s390_r13, alloc_size);
4995                                 }
4996                                 switch (ainfo->size) {
4997                                         case 1:
4998                                                 if (ainfo->reg == STK_BASE)
4999                                                         s390_ic (code, reg, 0, s390_r13, ainfo->offset+7);
5000                                                 s390_stc (code, reg, 0, inst->inst_basereg, doffset);
5001                                                 break;
5002                                         case 2:
5003                                                 if (ainfo->reg == STK_BASE)
5004                                                         s390_lh (code, reg, 0, s390_r13, ainfo->offset+6);
5005                                                 s390_sth (code, reg, 0, inst->inst_basereg, doffset);
5006                                                 break;
5007                                         case 4:
5008                                                 if (ainfo->reg == STK_BASE)
5009                                                         s390_l  (code, reg, 0, s390_r13, ainfo->offset+4);
5010                                                 s390_st (code, reg, 0, inst->inst_basereg, doffset);
5011                                                 break;
5012                                         case 8:
5013                                                 if (ainfo->reg == STK_BASE)
5014                                                         s390_lg  (code, reg, 0, s390_r13, ainfo->offset);
5015                                                 s390_stg (code, reg, 0, inst->inst_basereg, doffset);
5016                                                 break;
5017                                 }
5018                         } else if (ainfo->regtype == RegTypeStructByAddr) {
5019                                 s390_stg (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
5020                         } else if (ainfo->regtype == RegTypeStructByAddrOnStack) {
5021                         } else
5022                                 g_assert_not_reached ();
5023                 }
5024                 pos++;
5025         }
5026
5027         if (method->save_lmf) {
5028                 /*---------------------------------------------------------------*/
5029                 /* we build the MonoLMF structure on the stack - see mini-s390.h */
5030                 /*---------------------------------------------------------------*/
5031                 lmfOffset = alloc_size - sizeof(MonoLMF);
5032
5033                 s390_lgr   (code, s390_r13, cfg->frame_reg);
5034                 s390_aghi  (code, s390_r13, lmfOffset);
5035
5036                 /*---------------------------------------------------------------*/
5037                 /* Preserve the parameter registers while we fix up the lmf      */
5038                 /*---------------------------------------------------------------*/
5039                 s390_stmg  (code, s390_r2, s390_r6, s390_r13,
5040                             G_STRUCT_OFFSET(MonoLMF, pregs[0]));
5041
5042                 /*---------------------------------------------------------------*/
5043                 /* On return from this call r2 have the address of the &lmf      */
5044                 /*---------------------------------------------------------------*/
5045                 s390_basr(code, s390_r14, 0);
5046                 s390_j   (code, 6);
5047                 mono_add_patch_info (cfg, code - cfg->native_code,
5048                                      MONO_PATCH_INFO_INTERNAL_METHOD,
5049                                      (gpointer)"mono_get_lmf_addr");
5050                 s390_llong(code, 0);
5051                 s390_lg   (code, s390_r1, 0, s390_r14, 4);
5052                 s390_basr (code, s390_r14, s390_r1);
5053
5054                 /*---------------------------------------------------------------*/
5055                 /* Set lmf.lmf_addr = jit_tls->lmf                               */
5056                 /*---------------------------------------------------------------*/
5057                 s390_stg   (code, s390_r2, 0, s390_r13,
5058                             G_STRUCT_OFFSET(MonoLMF, lmf_addr));
5059
5060                 /*---------------------------------------------------------------*/
5061                 /* Get current lmf                                               */
5062                 /*---------------------------------------------------------------*/
5063                 s390_lg    (code, s390_r0, 0, s390_r2, 0);
5064
5065                 /*---------------------------------------------------------------*/
5066                 /* Set our lmf as the current lmf                                */
5067                 /*---------------------------------------------------------------*/
5068                 s390_stg   (code, s390_r13, 0, s390_r2, 0);
5069
5070                 /*---------------------------------------------------------------*/
5071                 /* Have our lmf.previous_lmf point to the last lmf               */
5072                 /*---------------------------------------------------------------*/
5073                 s390_stg   (code, s390_r0, 0, s390_r13,
5074                             G_STRUCT_OFFSET(MonoLMF, previous_lmf));
5075
5076                 /*---------------------------------------------------------------*/
5077                 /* save method info                                              */
5078                 /*---------------------------------------------------------------*/
5079                 s390_basr  (code, s390_r1, 0);
5080                 s390_j     (code, 6);
5081                 s390_llong (code, method);
5082                 s390_lg    (code, s390_r1, 0, s390_r1, 4);
5083                 s390_stg   (code, s390_r1, 0, s390_r13,
5084                             G_STRUCT_OFFSET(MonoLMF, method));
5085
5086                 /*---------------------------------------------------------------*/
5087                 /* save the current IP                                           */
5088                 /*---------------------------------------------------------------*/
5089                 s390_stg   (code, STK_BASE, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, ebp));
5090                 s390_basr  (code, s390_r1, 0);
5091                 s390_stg   (code, s390_r1, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, eip));
5092
5093                 /*---------------------------------------------------------------*/
5094                 /* Save general and floating point registers                     */
5095                 /*---------------------------------------------------------------*/
5096                 s390_stmg  (code, s390_r2, s390_r12, s390_r13,
5097                             G_STRUCT_OFFSET(MonoLMF, gregs[2]));
5098                 for (i = 0; i < 16; i++) {
5099                         s390_std  (code, i, 0, s390_r13,
5100                                    G_STRUCT_OFFSET(MonoLMF, fregs[i]));
5101                 }
5102
5103                 /*---------------------------------------------------------------*/
5104                 /* Restore the parameter registers now that we've set up the lmf */
5105                 /*---------------------------------------------------------------*/
5106                 s390_lmg   (code, s390_r2, s390_r6, s390_r13,
5107                             G_STRUCT_OFFSET(MonoLMF, pregs[0]));
5108         }
5109
5110         if (tracing)
5111                 code = mono_arch_instrument_prolog(cfg, enter_method, code, TRUE);
5112
5113         cfg->code_len = code - cfg->native_code;
5114         g_assert (cfg->code_len < cfg->code_size);
5115
5116         return code;
5117 }
5118
5119 /*========================= End of Function ========================*/
5120
5121 /*------------------------------------------------------------------*/
5122 /*                                                                  */
5123 /* Name         - mono_arch_emit_epilog                             */
5124 /*                                                                  */
5125 /* Function     - Emit the instructions for a function epilog.      */
5126 /*                                                                  */
5127 /*------------------------------------------------------------------*/
5128
5129 void
5130 mono_arch_emit_epilog (MonoCompile *cfg)
5131 {
5132         MonoMethod *method = cfg->method;
5133         int tracing = 0;
5134         guint8 *code;
5135         int max_epilog_size = 96;
5136
5137         if (cfg->method->save_lmf)
5138                 max_epilog_size += 128;
5139
5140         if (mono_jit_trace_calls != NULL)
5141                 max_epilog_size += 128;
5142
5143         if (cfg->prof_options & MONO_PROFILE_ENTER_LEAVE)
5144                 max_epilog_size += 128;
5145
5146         while ((cfg->code_len + max_epilog_size) > (cfg->code_size - 16)) {
5147                 cfg->code_size  *= 2;
5148                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
5149                 mono_jit_stats.code_reallocs++;
5150         }
5151
5152         code = cfg->native_code + cfg->code_len;
5153
5154         if (mono_jit_trace_calls != NULL && mono_trace_eval (method)) {
5155                 code = mono_arch_instrument_epilog (cfg, leave_method, code, TRUE);
5156                 tracing = 1;
5157         }
5158
5159         if (method->save_lmf)
5160                 restoreLMF(code, cfg->frame_reg, cfg->stack_usage);
5161
5162         if (cfg->flags & MONO_CFG_HAS_ALLOCA)
5163                 s390_lg  (code, STK_BASE, 0, STK_BASE, 0);
5164         else
5165                 code = backUpStackPtr(cfg, code);
5166
5167         s390_lmg (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
5168         s390_br  (code, s390_r14);
5169
5170         cfg->code_len = code - cfg->native_code;
5171
5172         g_assert (cfg->code_len < cfg->code_size);
5173
5174 }
5175
5176 /*========================= End of Function ========================*/
5177
5178 /*------------------------------------------------------------------*/
5179 /*                                                                  */
5180 /* Name         - mono_arch_emit_exceptions                         */
5181 /*                                                                  */
5182 /* Function     - Emit the blocks to handle exception conditions.   */
5183 /*                                                                  */
5184 /*------------------------------------------------------------------*/
5185
5186 void
5187 mono_arch_emit_exceptions (MonoCompile *cfg)
5188 {
5189         MonoJumpInfo    *patch_info;
5190         guint8          *code;
5191         int             nThrows = 0,
5192                         exc_count = 0,
5193                         iExc;
5194         guint32         code_size;
5195         MonoClass       *exc_classes [MAX_EXC];
5196         guint8          *exc_throw_start [MAX_EXC];
5197
5198         for (patch_info = cfg->patch_info;
5199              patch_info;
5200              patch_info = patch_info->next) {
5201                 if (patch_info->type == MONO_PATCH_INFO_EXC)
5202                         exc_count++;
5203         }
5204
5205         code_size = exc_count * 48;
5206
5207         while ((cfg->code_len + code_size) > (cfg->code_size - 16)) {
5208                 cfg->code_size  *= 2;
5209                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
5210                 mono_jit_stats.code_reallocs++;
5211         }
5212
5213         code = cfg->native_code + cfg->code_len;
5214
5215         /*---------------------------------------------------------------------*/
5216         /* Add code to raise exceptions                                        */
5217         /*---------------------------------------------------------------------*/
5218         for (patch_info = cfg->patch_info; patch_info; patch_info = patch_info->next) {
5219                 switch (patch_info->type) {
5220                 case MONO_PATCH_INFO_EXC: {
5221                         guint8 *ip = patch_info->ip.i + cfg->native_code;
5222                         MonoClass *exc_class;
5223                         guint64 throw_ip;
5224
5225                         /*-----------------------------------------------------*/
5226                         /* Patch the branch in epilog to come here             */
5227                         /*-----------------------------------------------------*/
5228                         s390_patch_rel (ip + 2, (guint64) S390_RELATIVE(code,ip));
5229
5230                         exc_class = mono_class_from_name (mono_defaults.corlib,
5231                                                           "System",
5232                                                           patch_info->data.name);
5233                         g_assert (exc_class);
5234                         throw_ip = patch_info->ip.i;
5235
5236                         for (iExc = 0; iExc < nThrows; ++iExc)
5237                                 if (exc_classes [iExc] == exc_class)
5238                                         break;
5239
5240                         if (iExc < nThrows) {
5241                                 s390_jcl (code, S390_CC_UN,
5242                                           (guint64) exc_throw_start [iExc]);
5243                                 patch_info->type = MONO_PATCH_INFO_NONE;
5244                         } else {
5245
5246                                 if (nThrows < MAX_EXC) {
5247                                         exc_classes [nThrows]     = exc_class;
5248                                         exc_throw_start [nThrows] = code;
5249                                 }
5250
5251                                 /*---------------------------------------------*/
5252                                 /* Patch the parameter passed to the handler   */
5253                                 /*---------------------------------------------*/
5254                                 s390_basr (code, s390_r13, 0);
5255                                 s390_j    (code, 6);
5256 //                              s390_llong(code, patch_info->data.target);
5257                                 s390_llong(code, exc_class->type_token);
5258                                 /*---------------------------------------------*/
5259                                 /* Load return address & parameter register    */
5260                                 /*---------------------------------------------*/
5261                                 s390_larl (code, s390_r14, (guint64)S390_RELATIVE((patch_info->ip.i +
5262                                                            cfg->native_code + 8), code));
5263                                 s390_lg   (code, s390_r2, 0, s390_r13, 4);
5264                                 /*---------------------------------------------*/
5265                                 /* Reuse the current patch to set the jump     */
5266                                 /*---------------------------------------------*/
5267                                 s390_basr (code, s390_r13, 0);
5268                                 s390_j    (code, 6);
5269                                 patch_info->type      = MONO_PATCH_INFO_INTERNAL_METHOD;
5270                                 patch_info->data.name = "mono_arch_throw_corlib_exception";
5271                                 patch_info->ip.i      = code - cfg->native_code;
5272                                 s390_llong(code, 0);
5273                                 s390_lg   (code, s390_r1, 0, s390_r13, 4);
5274                                 s390_br   (code, s390_r1);
5275                         }
5276                         break;
5277                 }
5278                 default:
5279                         /* do nothing */
5280                         break;
5281                 }
5282         }
5283
5284         cfg->code_len = code - cfg->native_code;
5285
5286         g_assert (cfg->code_len < cfg->code_size);
5287
5288 }
5289
5290 /*========================= End of Function ========================*/
5291
5292 /*------------------------------------------------------------------*/
5293 /*                                                                  */
5294 /* Name         - mono_arch_setup_jit_tls_data                      */
5295 /*                                                                  */
5296 /* Function     - Setup the JIT's Thread Level Specific Data.       */
5297 /*                                                                  */
5298 /*------------------------------------------------------------------*/
5299
5300 void
5301 mono_arch_setup_jit_tls_data (MonoJitTlsData *tls)
5302 {
5303         if (!tls_offset_inited) {
5304                 tls_offset_inited = TRUE;
5305
5306 #if HAVE_KW_THREAD
5307 # if 0
5308         __asm__ ("\tear\t%r1,0\n"
5309                  "\tlr\t%0,%3\n"
5310                  "\tsr\t%0,%r1\n"
5311                  "\tlr\t%1,%4\n"
5312                  "\tsr\t%1,%r1\n"
5313                  "\tlr\t%2,%5\n"
5314                  "\tsr\t%2,%r1\n"
5315                  : "=r" (appdomain_tls_offset),
5316                    "=r" (thread_tls_offset),
5317                    "=r" (lmf_tls_offset)
5318                  : "r" (&tls_appdomain),
5319                    "r" (&tls_current_object),
5320                    "r" (&mono_lmf_addr)
5321                  : "1", "cc");
5322 # endif
5323 #endif
5324         }
5325
5326         if (!lmf_addr_key_inited) {
5327                 lmf_addr_key_inited = TRUE;
5328                 pthread_key_create (&lmf_addr_key, NULL);
5329         }
5330         pthread_setspecific (lmf_addr_key, &tls->lmf);
5331
5332 }
5333
5334 /*========================= End of Function ========================*/
5335
5336 /*------------------------------------------------------------------*/
5337 /*                                                                  */
5338 /* Name         - mono_arch_free_jit_tls_data                       */
5339 /*                                                                  */
5340 /* Function     - Free tls data.                                    */
5341 /*                                                                  */
5342 /*------------------------------------------------------------------*/
5343
5344 void
5345 mono_arch_free_jit_tls_data (MonoJitTlsData *tls)
5346 {
5347 }
5348
5349 /*========================= End of Function ========================*/
5350
5351 /*------------------------------------------------------------------*/
5352 /*                                                                  */
5353 /* Name         - mono_arch_emit_inst_for_method                        */
5354 /*                                                                  */
5355 /*------------------------------------------------------------------*/
5356
5357 MonoInst*
5358 mono_arch_emit_inst_for_method (MonoCompile *cfg, MonoMethod *cmethod, MonoMethodSignature *fsig, MonoInst **args)
5359 {
5360         return NULL;
5361 }
5362
5363 /*========================= End of Function ========================*/
5364
5365 /*------------------------------------------------------------------*/
5366 /*                                                                  */
5367 /* Name         - mono_arch_decompose_opts                          */
5368 /*                                                                  */
5369 /* Function     - Decompose opcode into a System z opcode.          */
5370 /*                                                                  */
5371 /*------------------------------------------------------------------*/
5372
5373 void
5374 mono_arch_decompose_opts (MonoCompile *cfg, MonoInst *ins)
5375 {
5376         /*
5377          * Have to rename these to avoid being decomposed normally, since the normal
5378          * decomposition does not work on S390.
5379          */
5380         switch (ins->opcode) {
5381         case OP_ISUB_OVF:
5382                 ins->opcode = OP_S390_ISUB_OVF;
5383                 break;
5384         case OP_ISUB_OVF_UN:
5385                 ins->opcode = OP_S390_ISUB_OVF_UN;
5386                 break;
5387         case OP_IADD_OVF:
5388                 ins->opcode = OP_S390_IADD_OVF;
5389                 break;
5390         case OP_IADD_OVF_UN:
5391                 ins->opcode = OP_S390_IADD_OVF_UN;
5392                 break;
5393         case OP_LADD_OVF:
5394                 ins->opcode = OP_S390_LADD_OVF;
5395                 break;
5396         case OP_LADD_OVF_UN:
5397                 ins->opcode = OP_S390_LADD_OVF_UN;
5398                 break;
5399         case OP_LSUB_OVF:
5400                 ins->opcode = OP_S390_LSUB_OVF;
5401                 break;
5402         case OP_LSUB_OVF_UN:
5403                 ins->opcode = OP_S390_LSUB_OVF_UN;
5404                 break;
5405         default:
5406                 break;
5407         }
5408 }
5409
5410 /*========================= End of Function ========================*/
5411
5412 /*------------------------------------------------------------------*/
5413 /*                                                                  */
5414 /* Name         - mono_arch_print_tree                              */
5415 /*                                                                  */
5416 /* Function     - Print platform-specific opcode details.           */
5417 /*                                                                  */
5418 /* Returns      - 1 - opcode details have been printed              */
5419 /*                0 - opcode details have not been printed          */
5420 /*                                                                  */
5421 /*------------------------------------------------------------------*/
5422
5423 gboolean
5424 mono_arch_print_tree (MonoInst *tree, int arity)
5425 {
5426         gboolean done;
5427
5428         switch (tree->opcode) {
5429                 case OP_S390_LOADARG:
5430                 case OP_S390_ARGREG:
5431                 case OP_S390_ARGPTR:
5432                         printf ("[0x%lx(%s)]", tree->inst_offset,
5433                                 mono_arch_regname (tree->inst_basereg));
5434                         done = 1;
5435                         break;
5436                 case OP_S390_STKARG:
5437                         printf ("[0x%lx(previous_frame)]",
5438                                 tree->inst_offset);
5439                         done = 1;
5440                         break;
5441                 case OP_S390_MOVE:
5442                         printf ("[0x%lx(%d,%s),0x%lx(%s)]",
5443                                 tree->inst_offset, tree->backend.size,
5444                                 mono_arch_regname(tree->dreg),
5445                                 tree->inst_imm,
5446                                 mono_arch_regname(tree->sreg1));
5447                         done = 1;
5448                         break;
5449                 case OP_S390_SETF4RET:
5450                         printf ("[f%s,f%s]",
5451                                 mono_arch_regname (tree->dreg),
5452                                 mono_arch_regname (tree->sreg1));
5453                         done = 1;
5454                         break;
5455                 case OP_TLS_GET:
5456                         printf ("[0x%lx(0x%lx,%s)]", tree->inst_offset,
5457                                 tree->inst_imm,
5458                                 mono_arch_regname (tree->sreg1));
5459                         done = 1;
5460                         break;
5461                 case OP_S390_BKCHAIN:
5462                         printf ("[previous_frame(%s)]",
5463                                 mono_arch_regname (tree->sreg1));
5464                         done = 1;
5465                 default:
5466                         done = 0;
5467         }
5468         return (done);
5469 }
5470
5471 /*========================= End of Function ========================*/
5472
5473 /*------------------------------------------------------------------*/
5474 /*                                                                  */
5475 /* Name         - mono_arch_regalloc_cost                           */
5476 /*                                                                  */
5477 /* Function     - Determine the cost, in the number of memory       */
5478 /*                references, of the action of allocating the var-  */
5479 /*                iable VMV into a register during global register  */
5480 /*                allocation.                                       */
5481 /*                                                                  */
5482 /* Returns      - Cost                                              */
5483 /*                                                                  */
5484 /*------------------------------------------------------------------*/
5485
5486 guint32
5487 mono_arch_regalloc_cost (MonoCompile *cfg, MonoMethodVar *vmv)
5488 {
5489         /* FIXME: */
5490         return 2;
5491 }
5492
5493 /*========================= End of Function ========================*/
5494
5495 /*------------------------------------------------------------------*/
5496 /*                                                                  */
5497 /* Name         - mono_arch_get_domain_intrinsic                    */
5498 /*                                                                  */
5499 /* Function     -                                                   */
5500 /*                                                                  */
5501 /* Returns      -                                                   */
5502 /*                                                                  */
5503 /*------------------------------------------------------------------*/
5504
5505 MonoInst *
5506 mono_arch_get_domain_intrinsic (MonoCompile* cfg)
5507 {
5508         MonoInst *ins;
5509
5510         if (appdomain_tls_offset == -1)
5511                 return NULL;
5512
5513         MONO_INST_NEW (cfg, ins, OP_TLS_GET);
5514         ins->inst_offset = appdomain_tls_offset;
5515         return (ins);
5516 }
5517
5518 /*========================= End of Function ========================*/
5519
5520 /*------------------------------------------------------------------*/
5521 /*                                                                  */
5522 /* Name         - mono_arch_flush_register_windows                  */
5523 /*                                                                  */
5524 /* Function     -                                                   */
5525 /*                                                                  */
5526 /* Returns      -                                                   */
5527 /*                                                                  */
5528 /*------------------------------------------------------------------*/
5529
5530 void
5531 mono_arch_flush_register_windows (void)
5532 {
5533 }
5534
5535 /*========================= End of Function ========================*/
5536
5537 /*------------------------------------------------------------------*/
5538 /*                                                                  */
5539 /* Name         - mono_arch_get_lmf_addr                            */
5540 /*                                                                  */
5541 /* Function     -                                                   */
5542 /*                                                                  */
5543 /* Returns      -                                                   */
5544 /*                                                                  */
5545 /*------------------------------------------------------------------*/
5546
5547 gpointer
5548 mono_arch_get_lmf_addr (void)
5549 {
5550         return pthread_getspecific (lmf_addr_key);
5551 }
5552
5553 /*========================= End of Function ========================*/
5554
5555 /*------------------------------------------------------------------*/
5556 /*                                                                  */
5557 /* Name         - mono_arch_is_inst_imm                             */
5558 /*                                                                  */
5559 /* Function     - Determine if operand qualifies as an immediate    */
5560 /*                value. For s390 this is a value -32768-32768      */
5561 /*                                                                  */
5562 /* Returns      - True|False - is [not] immediate value.            */
5563 /*                                                                  */
5564 /*------------------------------------------------------------------*/
5565
5566 gboolean
5567 mono_arch_is_inst_imm (gint64 imm)
5568 {
5569         return s390_is_imm16 (imm);
5570 }
5571
5572 /*========================= End of Function ========================*/
5573
5574 /*------------------------------------------------------------------*/
5575 /*                                                                  */
5576 /* Name         - mono_arch_get_patch_offset                        */
5577 /*                                                                  */
5578 /* Function     - Dummy entry point until s390x supports aot.       */
5579 /*                                                                  */
5580 /* Returns      - Offset for patch.                                 */
5581 /*                                                                  */
5582 /*------------------------------------------------------------------*/
5583
5584 guint32
5585 mono_arch_get_patch_offset (guint8 *code)
5586 {
5587         return 0;
5588 }
5589
5590 /*========================= End of Function ========================*/
5591
5592 /*------------------------------------------------------------------*/
5593 /*                                                                  */
5594 /* Name         - mono_arch_context_get_int_reg.                    */
5595 /*                                                                  */
5596 /* Function     -                                                   */
5597 /*                                                                  */
5598 /* Returns      - Offset for patch.                                 */
5599 /*                                                                  */
5600 /*------------------------------------------------------------------*/
5601
5602 gpointer
5603 mono_arch_context_get_int_reg (MonoContext *ctx, int reg)
5604 {
5605         /* FIXME: implement */
5606         g_assert_not_reached ();
5607         return NULL;
5608 }
5609
5610 /*========================= End of Function ========================*/
5611
5612 /*------------------------------------------------------------------*/
5613 /*                                                                  */
5614 /* Name         - mono_arch_get_this_arg_from_call.                 */
5615 /*                                                                  */
5616 /* Function     -                                                   */
5617 /*                                                                  */
5618 /*------------------------------------------------------------------*/
5619
5620 gpointer
5621 mono_arch_get_this_arg_from_call (MonoGenericSharingContext *gsctx, MonoMethodSignature *sig, mgreg_t *regs, guint8 *code)
5622 {
5623         MonoLMF *lmf = (MonoLMF *) ((gchar *) regs - sizeof(MonoLMF));
5624
5625         /* FIXME: handle returning a struct */
5626         if (MONO_TYPE_ISSTRUCT (sig->ret))
5627                 return (gpointer) lmf->gregs [s390_r3];
5628         return (gpointer) lmf->gregs [s390_r2];
5629 }
5630
5631 /*========================= End of Function ========================*/
5632
5633 /*------------------------------------------------------------------*/
5634 /*                                                                  */
5635 /* Name         - get_delegate_invoke_impl.                         */
5636 /*                                                                  */
5637 /* Function     -                                                   */
5638 /*                                                                  */
5639 /*------------------------------------------------------------------*/
5640
5641 static gpointer
5642 get_delegate_invoke_impl (gboolean has_target, guint32 param_count, guint32 *code_len, gboolean aot)
5643 {
5644         guint8 *code, *start;
5645
5646         if (has_target) {
5647                 int size = 32;
5648
5649                 start = code = mono_global_codeman_reserve (size);
5650
5651                 /* Replace the this argument with the target */
5652                 s390_lg   (code, s390_r1, 0, s390_r2, G_STRUCT_OFFSET(MonoDelegate, method_ptr));
5653                 s390_lg   (code, s390_r2, 0, s390_r2, G_STRUCT_OFFSET(MonoDelegate, target));
5654                 s390_br   (code, s390_r1);
5655                 g_assert ((code - start) <= size);
5656
5657                 mono_arch_flush_icache (start, size);
5658         } else {
5659                 int size, i;
5660
5661                 size = 32 + param_count * 8;
5662                 start = code = mono_global_codeman_reserve (size);
5663
5664                 s390_lg   (code, s390_r1, 0, s390_r2, G_STRUCT_OFFSET(MonoDelegate, method_ptr));
5665                 /* slide down the arguments */
5666                 for (i = 0; i < param_count; ++i) {
5667                         s390_lgr (code, (s390_r2 + i), (s390_r2 + i + 1));
5668                 }
5669                 s390_br   (code, s390_r1);
5670
5671                 g_assert ((code - start) <= size);
5672
5673                 mono_arch_flush_icache (start, size);
5674         }
5675
5676         if (code_len)
5677                 *code_len = code - start;
5678
5679         return start;
5680 }
5681
5682 /*========================= End of Function ========================*/
5683
5684 /*------------------------------------------------------------------*/
5685 /*                                                                  */
5686 /* Name         - mono_arch_get_delegate_invoke_impls.              */
5687 /*                                                                  */
5688 /* Function     -                                                   */
5689 /*                                                                  */
5690 /*------------------------------------------------------------------*/
5691
5692 GSList*
5693 mono_arch_get_delegate_invoke_impls (void)
5694 {
5695         GSList *res = NULL;
5696         guint8 *code;
5697         guint32 code_len;
5698         int i;
5699
5700         code = get_delegate_invoke_impl (TRUE, 0, &code_len, TRUE);
5701         res = g_slist_prepend (res, mono_tramp_info_create (g_strdup ("delegate_invoke_impl_has_target"), code, code_len, NULL, NULL));
5702
5703         for (i = 0; i < MAX_ARCH_DELEGATE_PARAMS; ++i) {
5704                 code = get_delegate_invoke_impl (FALSE, i, &code_len, TRUE);
5705                 res = g_slist_prepend (res, mono_tramp_info_create (g_strdup_printf ("delegate_invoke_impl_target_%d", i), code, code_len, NULL, NULL));
5706         }
5707
5708         return res;
5709 }
5710
5711 /*========================= End of Function ========================*/
5712
5713 /*------------------------------------------------------------------*/
5714 /*                                                                  */
5715 /* Name         - mono_arch_get_delegate_invoke_impl.               */
5716 /*                                                                  */
5717 /* Function     -                                                   */
5718 /*                                                                  */
5719 /*------------------------------------------------------------------*/
5720
5721 gpointer
5722 mono_arch_get_delegate_invoke_impl (MonoMethodSignature *sig, gboolean has_target)
5723 {
5724         guint8 *code, *start;
5725
5726         /* FIXME: Support more cases */
5727         if (MONO_TYPE_ISSTRUCT (sig->ret))
5728                 return NULL;
5729
5730         if (has_target) {
5731                 static guint8* cached = NULL;
5732
5733                 if (cached)
5734                         return cached;
5735
5736                 if (mono_aot_only)
5737                         start = mono_aot_get_trampoline ("delegate_invoke_impl_has_target");
5738                 else
5739                         start = get_delegate_invoke_impl (TRUE, 0, NULL, FALSE);
5740
5741                 mono_memory_barrier ();
5742
5743                 cached = start;
5744         } else {
5745                 static guint8* cache [MAX_ARCH_DELEGATE_PARAMS + 1] = {NULL};
5746                 int i;
5747
5748                 if (sig->param_count > MAX_ARCH_DELEGATE_PARAMS)
5749                         return NULL;
5750                 for (i = 0; i < sig->param_count; ++i)
5751                         if (!mono_is_regsize_var (sig->params [i]))
5752                                 return NULL;
5753
5754
5755                 code = cache [sig->param_count];
5756                 if (code)
5757                         return code;
5758
5759                 if (mono_aot_only) {
5760                         char *name = g_strdup_printf ("delegate_invoke_impl_target_%d", sig->param_count);
5761                         start = mono_aot_get_trampoline (name);
5762                         g_free (name);
5763                 } else {
5764                         start = get_delegate_invoke_impl (FALSE, sig->param_count, NULL, FALSE);
5765                 }
5766
5767                 mono_memory_barrier ();
5768
5769                 cache [sig->param_count] = start;
5770         }
5771         return start;
5772 }
5773
5774 /*========================= End of Function ========================*/
5775
5776 /*------------------------------------------------------------------*/
5777 /*                                                                  */
5778 /* Name         - mono_arch_build_imt_thunk.                        */
5779 /*                                                                  */
5780 /* Function     -                                                   */
5781 /*                                                                  */
5782 /*------------------------------------------------------------------*/
5783
5784 gpointer
5785 mono_arch_build_imt_thunk (MonoVTable *vtable, MonoDomain *domain,
5786                            MonoIMTCheckItem **imt_entries, int count,
5787                            gpointer fail_tramp)
5788 {
5789         int i;
5790         int size = 0;
5791         guchar *code, *start;
5792
5793         for (i = 0; i < count; ++i) {
5794                 MonoIMTCheckItem *item = imt_entries [i];
5795                 if (item->is_equals) {
5796                         if (item->check_target_idx) {
5797                                 if (!item->compare_done)
5798                                         item->chunk_size += CMP_SIZE + JUMP_SIZE;
5799                                 if (item->has_target_code)
5800                                         item->chunk_size += BR_SIZE + JUMP_SIZE + LOADCON_SIZE;
5801                                 else
5802                                         item->chunk_size += BR_SIZE + JUMP_SIZE + LOADCON_SIZE +
5803                                                             LOAD_SIZE;
5804                         } else {
5805                                 if (fail_tramp) {
5806                                         item->chunk_size += CMP_SIZE + 2 * BR_SIZE + JUMP_SIZE +
5807                                                             2 * LOADCON_SIZE;
5808                                         if (!item->has_target_code)
5809                                                 item->chunk_size += LOAD_SIZE;
5810                                 } else {
5811                                         item->chunk_size += LOADCON_SIZE + LOAD_SIZE + BR_SIZE;
5812 #if ENABLE_WRONG_METHOD_CHECK
5813                                         item->chunk_size += CMP_SIZE + JUMP_SIZE;
5814 #endif
5815                                 }
5816                         }
5817                 } else {
5818                         item->chunk_size += CMP_SIZE + JUMP_SIZE;
5819                         imt_entries [item->check_target_idx]->compare_done = TRUE;
5820                 }
5821                 size += item->chunk_size;
5822         }
5823
5824         if (fail_tramp)
5825                 code = mono_method_alloc_generic_virtual_thunk (domain, size);
5826         else
5827                 code = mono_domain_code_reserve (domain, size);
5828
5829         start = code;
5830
5831         for (i = 0; i < count; ++i) {
5832                 MonoIMTCheckItem *item = imt_entries [i];
5833                 item->code_target = (guint8 *) code;
5834                 if (item->is_equals) {
5835                         if (item->check_target_idx) {
5836                                 if (!item->compare_done) {
5837                                         s390_basr (code, s390_r13, s390_r0);
5838                                         s390_j    (code, 6);
5839                                         s390_llong(code, item->key);
5840                                         s390_lg   (code, s390_r0, 0, s390_r13, 4);
5841                                         s390_cgr  (code, s390_r0, MONO_ARCH_IMT_REG);
5842                                 }
5843                                 item->jmp_code = (guint8*) code;
5844                                 s390_jcl (code, S390_CC_NE, 0);
5845
5846                                 s390_basr (code, s390_r13, s390_r0);
5847                                 s390_j    (code, 6);
5848                                 if (item->has_target_code)  {
5849                                         s390_llong(code, item->value.target_code);
5850                                         s390_lg   (code, s390_r1, 0, s390_r13, 4);
5851                                 } else {
5852                                         s390_llong(code, (&(vtable->vtable [item->value.vtable_slot])));
5853                                         s390_lg   (code, s390_r1, 0, s390_r13, 4);
5854                                         s390_lg   (code, s390_r1, 0, s390_r1, 0);
5855                                 }
5856                                 s390_br   (code, s390_r1);
5857                         } else {
5858                                 if (fail_tramp) {
5859                                         gint64  target;
5860
5861                                         s390_basr (code, s390_r13, s390_r0);
5862                                         s390_j    (code, 6);
5863                                         s390_llong(code, item->key);
5864                                         s390_lg   (code, s390_r0, 0, s390_r13, 4);
5865                                         s390_cgr  (code, s390_r0, MONO_ARCH_IMT_REG);
5866                                         item->jmp_code = (guint8*) code;
5867                                         s390_jcl  (code, S390_CC_NE, 0);
5868                                         s390_basr (code, s390_r13, s390_r0);
5869                                         s390_j    (code, 6);
5870                                         if (item->has_target_code) {
5871                                                 s390_llong(code, item->value.target_code);
5872                                                 s390_lg   (code, s390_r1, 0, s390_r13, 4);
5873                                         } else {
5874                                                 g_assert (vtable);
5875                                                 s390_llong(code, (&(vtable->vtable [item->value.vtable_slot])));
5876                                                 s390_lg   (code, s390_r1, 0, s390_r13, 4);
5877                                                 s390_lg   (code, s390_r1, 0, s390_r1, 0);
5878                                         }
5879                                         s390_br   (code, s390_r1);
5880                                         target = S390_RELATIVE(code, item->jmp_code);
5881                                         s390_patch_rel(item->jmp_code+2, target);
5882                                         s390_basr (code, s390_r13, s390_r0);
5883                                         s390_j    (code, 6);
5884                                         s390_llong(code, fail_tramp);
5885                                         s390_lg   (code, s390_r1, 0, s390_r13, 4);
5886                                         s390_br   (code, s390_r1);
5887                                         item->jmp_code = NULL;
5888                                 } else {
5889                                 /* enable the commented code to assert on wrong method */
5890 #if ENABLE_WRONG_METHOD_CHECK
5891                                         g_assert_not_reached ();
5892 #endif
5893                                         s390_basr (code, s390_r13, s390_r0);
5894                                         s390_j    (code, 6);
5895                                         s390_llong(code, (&(vtable->vtable [item->value.vtable_slot])));
5896                                         s390_lg   (code, s390_r1, 0, s390_r13, 4);
5897                                         s390_lg   (code, s390_r1, 0, s390_r1, 0);
5898                                         s390_br   (code, s390_r1);
5899 #if ENABLE_WRONG_METHOD_CHECK
5900                                         g_assert_not_reached ();
5901 #endif
5902                                 }
5903                         }
5904                 } else {
5905                         s390_basr (code, s390_r13, s390_r0);
5906                         s390_j    (code, 6);
5907                         s390_llong(code, item->key);
5908                         s390_lg   (code, s390_r0, 0, s390_r13, 4);
5909                         s390_cgr  (code, MONO_ARCH_IMT_REG, s390_r0);
5910                         item->jmp_code = (guint8 *) code;
5911                         s390_jcl  (code, S390_CC_GE, 0);
5912                 }
5913         }
5914         /* patch the branches to get to the target items */
5915         for (i = 0; i < count; ++i) {
5916                 MonoIMTCheckItem *item = imt_entries [i];
5917                 if (item->jmp_code) {
5918                         if (item->check_target_idx) {
5919                                 gint64 offset;
5920                                 offset = S390_RELATIVE(imt_entries [item->check_target_idx]->code_target,
5921                                                        item->jmp_code);
5922                                 s390_patch_rel ((guchar *) item->jmp_code + 2, (guint64) offset);
5923                         }
5924                 }
5925         }
5926
5927         mono_arch_flush_icache ((guint8*)start, (code - start));
5928
5929         if (!fail_tramp)
5930                 mono_stats.imt_thunks_size += (code - start);
5931
5932         g_assert (code - start <= size);
5933
5934         return (start);
5935 }
5936
5937 /*========================= End of Function ========================*/
5938
5939 /*------------------------------------------------------------------*/
5940 /*                                                                  */
5941 /* Name         - mono_arch_find_imt_method.                        */
5942 /*                                                                  */
5943 /* Function     - Get the method address from MONO_ARCH_IMT_REG     */
5944 /*                found in the save area.                           */
5945 /*                                                                  */
5946 /*------------------------------------------------------------------*/
5947
5948 MonoMethod*
5949 mono_arch_find_imt_method (mgreg_t *regs, guint8 *code)
5950 {
5951         MonoLMF *lmf = (MonoLMF *) ((gchar *) regs - sizeof(MonoLMF));
5952
5953         return ((MonoMethod *) lmf->gregs [MONO_ARCH_IMT_REG]);
5954 }
5955
5956 /*========================= End of Function ========================*/
5957
5958 /*------------------------------------------------------------------*/
5959 /*                                                                  */
5960 /* Name         - mono_arch_find_this_argument.                     */
5961 /*                                                                  */
5962 /* Function     -                                                   */
5963 /*                                                                  */
5964 /*------------------------------------------------------------------*/
5965
5966 MonoObject *
5967 mono_arch_find_this_argument (mgreg_t *regs, MonoMethod *method,
5968                               MonoGenericSharingContext *gsctx)
5969 {
5970         return mono_arch_get_this_arg_from_call (gsctx, mono_method_signature (method), regs, NULL);
5971 }
5972
5973 /*========================= End of Function ========================*/