mono/mini/mini-s390.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 EMIT_COND_BRANCH(ins,cond)                                                      \
  22 {                                                                                       \
  23 if (ins->flags & MONO_INST_BRLABEL) {                                                   \
  24         if (ins->inst_i0->inst_c0) {                                                    \
  25                 int displace;                                                           \
  26                 displace = ((cfg->native_code + ins->inst_i0->inst_c0) - code) / 2;     \
  27                 if (s390_is_imm16(displace)) {                                          \
  28                         s390_brc (code, cond, displace);                                \
  29                 } else {                                                                \
  30                         s390_jcl (code, cond, displace);                                \
  31                 }                                                                       \
  32         } else {                                                                        \
  33                 mono_add_patch_info (cfg, code - cfg->native_code,                      \
  34                                      MONO_PATCH_INFO_LABEL, ins->inst_i0);              \
  35                 s390_jcl (code, cond, 0);                                               \
  36         }                                                                               \
  37 } else {                                                                                \
  38         if (ins->inst_true_bb->native_offset) {                                         \
  39                 int displace;                                                           \
  40                 displace = ((cfg->native_code +                                         \
  41                             ins->inst_true_bb->native_offset) - code) / 2;              \
  42                 if (s390_is_imm16(displace)) {                                          \
  43                         s390_brc (code, cond, displace);                                \
  44                 } else {                                                                \
  45                         s390_jcl (code, cond, displace);                                \
  46                 }                                                                       \
  47         } else {                                                                        \
  48                 mono_add_patch_info (cfg, code - cfg->native_code,                      \
  49                                      MONO_PATCH_INFO_BB, ins->inst_true_bb);            \
  50                 s390_jcl (code, cond, 0);                                               \
  51         }                                                                               \
  52 }                                                                                       \
  53 }
  54
  55 #define EMIT_UNCOND_BRANCH(ins)                                                         \
  56 {                                                                                       \
  57 if (ins->flags & MONO_INST_BRLABEL) {                                                   \
  58         if (ins->inst_i0->inst_c0) {                                                    \
  59                 int displace;                                                           \
  60                 displace = ((cfg->native_code + ins->inst_i0->inst_c0) - code) / 2;     \
  61                 if (s390_is_imm16(displace)) {                                          \
  62                         s390_brc (code, S390_CC_UN, displace);                          \
  63                 } else {                                                                \
  64                         s390_jcl (code, S390_CC_UN, displace);                          \
  65                 }                                                                       \
  66         } else {                                                                        \
  67                 mono_add_patch_info (cfg, code - cfg->native_code,                      \
  68                                      MONO_PATCH_INFO_LABEL, ins->inst_i0);              \
  69                 s390_jcl (code, S390_CC_UN, 0);                                         \
  70         }                                                                               \
  71 } else {                                                                                \
  72         if (ins->inst_target_bb->native_offset) {                                       \
  73                 int displace;                                                           \
  74                 displace = ((cfg->native_code +                                         \
  75                             ins->inst_target_bb->native_offset) - code) / 2;            \
  76                 if (s390_is_imm16(displace)) {                                          \
  77                         s390_brc (code, S390_CC_UN, displace);                          \
  78                 } else {                                                                \
  79                         s390_jcl (code, S390_CC_UN, displace);                          \
  80                 }                                                                       \
  81         } else {                                                                        \
  82                 mono_add_patch_info (cfg, code - cfg->native_code,                      \
  83                                      MONO_PATCH_INFO_BB, ins->inst_target_bb);          \
  84                 s390_jcl (code, S390_CC_UN, 0);                                         \
  85         }                                                                               \
  86 }                                                                                       \
  87 }
  88
  89 #define EMIT_COND_SYSTEM_EXCEPTION(cond,exc_name)                       \
  90         do {                                                            \
  91                 mono_add_patch_info (cfg, code - cfg->native_code,      \
  92                                     MONO_PATCH_INFO_EXC, exc_name);     \
  93                 s390_jcl (code, cond, 0);                               \
  94         } while (0);
  95
  96 #define CHECK_SRCDST_COM                                                \
  97         if (ins->dreg == ins->sreg2) {                                  \
  98                 src2 = ins->sreg1;                                      \
  99         } else {                                                        \
 100                 src2 = ins->sreg2;                                      \
 101                 if (ins->dreg != ins->sreg1) {                          \
 102                         s390_lr  (code, ins->dreg, ins->sreg1);         \
 103                 }                                                       \
 104         }
 105
 106 #define CHECK_SRCDST_NCOM                                               \
 107         if (ins->dreg == ins->sreg2) {                                  \
 108                 src2 = s390_r13;                                        \
 109                 s390_lr  (code, s390_r13, ins->sreg2);                  \
 110         } else {                                                        \
 111                 src2 = ins->sreg2;                                      \
 112         }                                                               \
 113         if (ins->dreg != ins->sreg1) {                                  \
 114                 s390_lr  (code, ins->dreg, ins->sreg1);                 \
 115         }
 116
 117 #define CHECK_SRCDST_COM_F                                              \
 118         if (ins->dreg == ins->sreg2) {                                  \
 119                 src2 = ins->sreg1;                                      \
 120         } else {                                                        \
 121                 src2 = ins->sreg2;                                      \
 122                 if (ins->dreg != ins->sreg1) {                          \
 123                         s390_ldr (code, ins->dreg, ins->sreg1);         \
 124                 }                                                       \
 125         }
 126
 127 #define CHECK_SRCDST_NCOM_F                                             \
 128         if (ins->dreg == ins->sreg2) {                                  \
 129                 src2 = s390_f15;                                        \
 130                 s390_ldr (code, s390_r13, ins->sreg2);                  \
 131         } else {                                                        \
 132                 src2 = ins->sreg2;                                      \
 133         }                                                               \
 134         if (ins->dreg != ins->sreg1) {                                  \
 135                 s390_ldr (code, ins->dreg, ins->sreg1);                 \
 136         }
 137
 138 #define MONO_EMIT_NEW_MOVE2(cfg,dest,offset,src,imm,size) do {                  \
 139                 MonoInst *inst;                                                 \
 140                 int tmpr = 0;                                                   \
 141                 int sReg, dReg;                                                 \
 142                 MONO_INST_NEW (cfg, inst, OP_NOP);                                                              \
 143                 if (size > 256) {                                               \
 144                         tmpr = mono_alloc_preg (cfg); \
 145                         MONO_EMIT_NEW_ICONST(cfg,tmpr,size);                    \
 146                         inst->dreg        = dest;                               \
 147                         inst->inst_offset = offset;                             \
 148                         inst->sreg1       = src;                                \
 149                         inst->inst_imm    = imm;                                \
 150                         inst->sreg2       = tmpr;                               \
 151                 } else {                                                        \
 152                         if (s390_is_uimm12(offset)) {                           \
 153                                 inst->dreg        = dest;                       \
 154                                 inst->inst_offset = offset;                     \
 155                         } else {                                                \
 156                                 dReg = mono_alloc_preg (cfg); \
 157                                 MONO_EMIT_NEW_BIALU_IMM(cfg, OP_ADD_IMM,        \
 158                                         dReg, dest, offset);                    \
 159                                 inst->dreg        = dReg;                       \
 160                                 inst->inst_offset = 0;                          \
 161                         }                                                       \
 162                         if (s390_is_uimm12(imm)) {                              \
 163                                 inst->sreg1       = src;                        \
 164                                 inst->inst_imm    = imm;                        \
 165                         } else {                                                \
 166                                 sReg = mono_alloc_preg (cfg); \
 167                                 MONO_EMIT_NEW_BIALU_IMM(cfg, OP_ADD_IMM,        \
 168                                         sReg, src, imm);                        \
 169                                 inst->sreg1       = sReg;                       \
 170                                 inst->inst_imm    = 0;                          \
 171                         }                                                       \
 172                 }                                                               \
 173                 inst->opcode      = OP_S390_MOVE;                               \
 174                 inst->backend.size        = size;                                       \
 175         MONO_ADD_INS (cfg->cbb, inst); \
 176         } while (0)
 177
 178 #define MONO_OUTPUT_VTR2(cfg, size, dr, sr, so) do {                            \
 179         int reg = mono_alloc_preg (cfg); \
 180         switch (size) {                                                         \
 181                 case 0:                                                         \
 182                         MONO_EMIT_NEW_ICONST(cfg, reg, 0);                      \
 183                         mono_call_inst_add_outarg_reg(cfg, call, reg, dr, FALSE);       \
 184                 break;                                                          \
 185                 case 1:                                                         \
 186                         MONO_EMIT_NEW_LOAD_MEMBASE_OP(cfg, OP_LOADU1_MEMBASE,   \
 187                                 reg, sr, so);                                   \
 188                         mono_call_inst_add_outarg_reg(cfg, call, reg, dr, FALSE);       \
 189                 break;                                                          \
 190                 case 2:                                                         \
 191                         MONO_EMIT_NEW_LOAD_MEMBASE_OP(cfg, OP_LOADU2_MEMBASE,   \
 192                                 reg, sr, so);                                   \
 193                         mono_call_inst_add_outarg_reg(cfg, call, reg, dr, FALSE);       \
 194                 break;                                                          \
 195                 case 4:                                                         \
 196                         MONO_EMIT_NEW_LOAD_MEMBASE_OP(cfg, OP_LOAD_MEMBASE,     \
 197                                 reg, sr, so);                                   \
 198                         mono_call_inst_add_outarg_reg(cfg, call, reg, dr, FALSE);       \
 199                 break;                                                          \
 200                 case 8:                                                         \
 201                         MONO_EMIT_NEW_LOAD_MEMBASE_OP(cfg, OP_LOAD_MEMBASE,     \
 202                                 reg, sr, so);                                   \
 203                         mono_call_inst_add_outarg_reg(cfg, call, reg, dr, FALSE);       \
 204                         reg = mono_alloc_preg (cfg); \
 205                         MONO_EMIT_NEW_LOAD_MEMBASE_OP(cfg, OP_LOAD_MEMBASE,     \
 206                                 reg, sr, so + sizeof (guint32));                                        \
 207                         mono_call_inst_add_outarg_reg(cfg, call, reg, dr + 1, FALSE);   \
 208                 break;                                                          \
 209         }                                                                       \
 210 } while (0)
 211
 212 #define MONO_OUTPUT_VTS2(cfg, size, dr, dx, sr, so) do {                                \
 213         int tmpr;                                                               \
 214         switch (size) {                                                         \
 215                 case 0:                                                         \
 216                         tmpr = mono_alloc_preg (cfg); \
 217                         MONO_EMIT_NEW_ICONST(cfg, tmpr, 0);                     \
 218                         MONO_EMIT_NEW_STORE_MEMBASE(cfg, OP_STORE_MEMBASE_REG,  \
 219                                 dr, dx, tmpr);                                  \
 220                 break;                                                          \
 221                 case 1:                                                         \
 222                         tmpr = mono_alloc_preg (cfg); \
 223                         MONO_EMIT_NEW_LOAD_MEMBASE_OP(cfg, OP_LOADU1_MEMBASE,   \
 224                                 tmpr, sr, so);                                  \
 225                         MONO_EMIT_NEW_STORE_MEMBASE(cfg, OP_STORE_MEMBASE_REG,  \
 226                                 dr, dx, tmpr);                                  \
 227                 break;                                                          \
 228                 case 2:                                                         \
 229                         tmpr = mono_alloc_preg (cfg); \
 230                         MONO_EMIT_NEW_LOAD_MEMBASE_OP(cfg, OP_LOADU2_MEMBASE,   \
 231                                 tmpr, sr, so);                                  \
 232                         MONO_EMIT_NEW_STORE_MEMBASE(cfg, OP_STORE_MEMBASE_REG,  \
 233                                 dr, dx, tmpr);                                  \
 234                 break;                                                          \
 235                 case 4:                                                         \
 236                 case 8:                                                         \
 237                         MONO_EMIT_NEW_MOVE2 (cfg, dr, dx, sr, so, size);                \
 238                 break;                                                          \
 239         }                                                                       \
 240 } while (0)
 241
 242 #undef DEBUG
 243 #define DEBUG(a) if (cfg->verbose_level > 1) a
 244
 245 #define MAX_EXC 16
 246
 247 #define S390_TRACE_STACK_SIZE (5*sizeof(gint32)+3*sizeof(gdouble))
 248
 249 #define MAX (a, b) ((a) > (b) ? (a) : (b))
 250
 251 /*========================= End of Defines =========================*/
 252
 253 /*------------------------------------------------------------------*/
 254 /*                 I n c l u d e s                                  */
 255 /*------------------------------------------------------------------*/
 256
 257 #include "mini.h"
 258 #include <string.h>
 259
 260 #include <mono/metadata/appdomain.h>
 261 #include <mono/metadata/debug-helpers.h>
 262 #include <mono/metadata/profiler-private.h>
 263 #include <mono/utils/mono-math.h>
 264
 265 #include "mini-s390.h"
 266 #include "cpu-s390.h"
 267 #include "jit-icalls.h"
 268
 269 /*========================= End of Includes ========================*/
 270
 271 /*------------------------------------------------------------------*/
 272 /*                 T y p e d e f s                                  */
 273 /*------------------------------------------------------------------*/
 274
 275 typedef struct {
 276         guint stack_size,
 277               local_size,
 278               code_size,
 279               parm_size,
 280               offset,
 281               offStruct,
 282               retStruct;
 283 } size_data;
 284
 285 /*------------------------------------------------------------------*/
 286 /* Used by the instrument_emit_epilog                               */
 287 /*------------------------------------------------------------------*/
 288
 289 enum {
 290         SAVE_NONE,
 291         SAVE_STRUCT,
 292         SAVE_ONE,
 293         SAVE_TWO,
 294         SAVE_R4,
 295         SAVE_R8
 296 };
 297
 298 typedef struct InstList InstList;
 299
 300 struct InstList {
 301         InstList *prev;
 302         InstList *next;
 303         MonoInst *data;
 304 };
 305
 306 typedef enum {
 307         RegTypeGeneral,
 308         RegTypeBase,
 309         RegTypeFP,
 310         RegTypeFPR4,
 311         RegTypeStructByVal,
 312         RegTypeStructByValInFP,
 313         RegTypeStructByAddr
 314 } ArgStorage;
 315
 316 typedef struct {
 317         gint32  offset;         /* offset from caller's stack */
 318         gint32  offparm;        /* offset from callee's stack */
 319         guint16 vtsize;         /* in param area */
 320         guint8  reg;
 321         ArgStorage regtype;             /* See RegType* */
 322         guint32 size;           /* Size of structure used by RegTypeStructByVal */
 323 } ArgInfo;
 324
 325 typedef struct {
 326         int nargs;
 327         int lastgr;
 328         guint32 stack_usage;
 329         guint32 struct_ret;
 330         ArgInfo ret;
 331         ArgInfo sigCookie;
 332         size_data sz;
 333         ArgInfo args [1];
 334 } CallInfo;
 335
 336 typedef struct {
 337         gint32  gr[5];          /* R2-R6                            */
 338         gdouble fp[3];          /* F0-F2                            */
 339 } __attribute__ ((packed)) RegParm;
 340
 341 /*========================= End of Typedefs ========================*/
 342
 343 /*------------------------------------------------------------------*/
 344 /*                   P r o t o t y p e s                            */
 345 /*------------------------------------------------------------------*/
 346
 347 static void indent (int);
 348 static guint8 * backUpStackPtr(MonoCompile *, guint8 *, gint);
 349 static void decodeParm (MonoType *, void *, int);
 350 static void enter_method (MonoMethod *, RegParm *, char *);
 351 static void leave_method (MonoMethod *, ...);
 352 static gboolean is_regsize_var (MonoType *);
 353 static inline void add_general (guint *, size_data *, ArgInfo *, gboolean);
 354 static inline void add_stackParm (guint *, size_data *, ArgInfo *, gint);
 355 static inline void add_float (guint *, size_data *, ArgInfo *);
 356 static CallInfo * get_call_info (MonoCompile *, MonoMemPool *, MonoMethodSignature *, gboolean);
 357 static guchar * emit_float_to_int (MonoCompile *, guchar *, int, int, int, gboolean);
 358 gpointer mono_arch_get_lmf_addr (void);
 359 static guint8 * emit_load_volatile_registers(guint8 *, MonoCompile *);
 360 static void emit_sig_cookie (MonoCompile *, MonoCallInst *, CallInfo *, int);
 361
 362 /*========================= End of Prototypes ======================*/
 363
 364 /*------------------------------------------------------------------*/
 365 /*                 G l o b a l   V a r i a b l e s                  */
 366 /*------------------------------------------------------------------*/
 367
 368 int mono_exc_esp_offset = 0;
 369
 370 static int indent_level = 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 #if 0
 382
 383 extern __thread MonoDomain *tls_appdomain;
 384 extern __thread MonoThread *tls_current_object;
 385 extern __thread gpointer   mono_lmf_addr;
 386
 387 #endif
 388
 389 /*====================== End of Global Variables ===================*/
 390
 391 /*------------------------------------------------------------------*/
 392 /*                                                                  */
 393 /* Name         - mono_arch_regname                                 */
 394 /*                                                                  */
 395 /* Function     - Returns the name of the register specified by     */
 396 /*                the input parameter.                              */
 397 /*                                                                  */
 398 /*------------------------------------------------------------------*/
 399
 400 const char*
 401 mono_arch_regname (int reg) {
 402         static const char * rnames[] = {
 403                 "s390_r0", "s390_sp", "s390_r2", "s390_r3", "s390_r4",
 404                 "s390_r5", "s390_r6", "s390_r7", "s390_r8", "s390_r9",
 405                 "s390_r10", "s390_r11", "s390_r12", "s390_r13", "s390_r14",
 406                 "s390_r15"
 407         };
 408
 409         if (reg >= 0 && reg < 16)
 410                 return rnames [reg];
 411         else
 412                 return "unknown";
 413 }
 414
 415 /*========================= End of Function ========================*/
 416
 417 /*------------------------------------------------------------------*/
 418 /*                                                                  */
 419 /* Name         - mono_arch_fregname                                */
 420 /*                                                                  */
 421 /* Function     - Returns the name of the register specified by     */
 422 /*                the input parameter.                              */
 423 /*                                                                  */
 424 /*------------------------------------------------------------------*/
 425
 426 const char*
 427 mono_arch_fregname (int reg) {
 428         static const char * rnames[] = {
 429                 "s390_f0", "s390_f1", "s390_f2", "s390_f3", "s390_f4",
 430                 "s390_f5", "s390_f6", "s390_f7", "s390_f8", "s390_f9",
 431                 "s390_f10", "s390_f11", "s390_f12", "s390_f13", "s390_f14",
 432                 "s390_f15"
 433         };
 434
 435         if (reg >= 0 && reg < 16)
 436                 return rnames [reg];
 437         else
 438                 return "unknown";
 439 }
 440
 441 /*========================= End of Function ========================*/
 442
 443 /*------------------------------------------------------------------*/
 444 /*                                                                  */
 445 /* Name         - arch_get_argument_info                            */
 446 /*                                                                  */
 447 /* Function     - Gathers information on parameters such as size,   */
 448 /*                alignment, and padding. arg_info should be large  */
 449 /*                enough to hold param_count + 1 entries.           */
 450 /*                                                                  */
 451 /* Parameters   - @csig - Method signature                          */
 452 /*                @param_count - No. of parameters to consider      */
 453 /*                @arg_info - An array to store the result info     */
 454 /*                                                                  */
 455 /* Returns      - Size of the activation frame                      */
 456 /*                                                                  */
 457 /*------------------------------------------------------------------*/
 458
 459 int
 460 mono_arch_get_argument_info (MonoMethodSignature *csig,
 461                              int param_count,
 462                              MonoJitArgumentInfo *arg_info)
 463 {
 464         int k, frame_size = 0;
 465         int size, align, pad;
 466         int offset = 8;
 467
 468         if (MONO_TYPE_ISSTRUCT (csig->ret)) {
 469                 frame_size += sizeof (gpointer);
 470                 offset += 4;
 471         }
 472
 473         arg_info [0].offset = offset;
 474
 475         if (csig->hasthis) {
 476                 frame_size += sizeof (gpointer);
 477                 offset += 4;
 478         }
 479
 480         arg_info [0].size = frame_size;
 481
 482         for (k = 0; k < param_count; k++) {
 483
 484                 if (csig->pinvoke)
 485                         size = mono_type_native_stack_size (csig->params [k], &align);
 486                 else
 487                         size = mini_type_stack_size (NULL, csig->params [k], &align);
 488
 489                 frame_size += pad = (align - (frame_size & (align - 1))) & (align - 1);
 490                 arg_info [k].pad = pad;
 491                 frame_size += size;
 492                 arg_info [k + 1].pad = 0;
 493                 arg_info [k + 1].size = size;
 494                 offset += pad;
 495                 arg_info [k + 1].offset = offset;
 496                 offset += size;
 497         }
 498
 499         align = MONO_ARCH_FRAME_ALIGNMENT;
 500         frame_size += pad = (align - (frame_size & (align - 1))) & (align - 1);
 501         arg_info [k].pad = pad;
 502
 503         return frame_size;
 504 }
 505
 506 /*========================= End of Function ========================*/
 507
 508 /*------------------------------------------------------------------*/
 509 /*                                                                  */
 510 /* Name         - retFitsInReg.                                     */
 511 /*                                                                  */
 512 /* Function     - Determines if a value can be returned in one or   */
 513 /*                two registers.                                    */
 514 /*                                                                  */
 515 /*------------------------------------------------------------------*/
 516
 517 static inline gboolean
 518 retFitsInReg(guint32 size)
 519 {
 520         switch (size) {
 521                 case 0:
 522                 case 1:
 523                 case 2:
 524                 case 4:
 525                 case 8:
 526                         return (TRUE);
 527                 break;
 528                 default:
 529                         return (FALSE);
 530         }
 531 }
 532
 533 /*========================= End of Function ========================*/
 534
 535 /*------------------------------------------------------------------*/
 536 /*                                                                  */
 537 /* Name         - backStackPtr.                                     */
 538 /*                                                                  */
 539 /* Function     - Restore Stack Pointer to previous frame.          */
 540 /*                                                                  */
 541 /*------------------------------------------------------------------*/
 542
 543 static inline guint8 *
 544 backUpStackPtr(MonoCompile *cfg, guint8 *code, gint framePtr)
 545 {
 546         int stackSize = cfg->stack_usage;
 547
 548         if (s390_is_uimm16 (cfg->stack_usage)) {
 549                 s390_ahi  (code, framePtr, cfg->stack_usage);
 550         } else {
 551                 while (stackSize > 32767) {
 552                         s390_ahi  (code, framePtr, 32767);
 553                         stackSize -= 32767;
 554                 }
 555                 s390_ahi  (code, framePtr, stackSize);
 556         }
 557         return (code);
 558 }
 559
 560 /*========================= End of Function ========================*/
 561
 562 /*------------------------------------------------------------------*/
 563 /*                                                                  */
 564 /* Name         - indent                                            */
 565 /*                                                                  */
 566 /* Function     - Perform nice indenting to current level           */
 567 /*                                                                  */
 568 /*------------------------------------------------------------------*/
 569
 570 static void
 571 indent (int diff) {
 572         int v;
 573         if (diff < 0)
 574                 indent_level += diff;
 575         v = indent_level;
 576         printf("[%3d] ",v);
 577         while (v-- > 0) {
 578                 printf (". ");
 579         }
 580         if (diff > 0)
 581                 indent_level += diff;
 582 }
 583
 584 /*========================= End of Function ========================*/
 585
 586 /*------------------------------------------------------------------*/
 587 /*                                                                  */
 588 /* Name         - decodeParm                                        */
 589 /*                                                                  */
 590 /* Function     - Decode a parameter for the trace.                 */
 591 /*                                                                  */
 592 /*------------------------------------------------------------------*/
 593
 594 static void
 595 decodeParm(MonoType *type, void *curParm, int size)
 596 {
 597         guint32 simpleType;
 598
 599         if (type->byref) {
 600                 printf("[BYREF:%p], ", *((char **) curParm));
 601         } else {
 602                 simpleType = mono_type_get_underlying_type(type)->type;
 603 enum_parmtype:
 604                 switch (simpleType) {
 605                         case MONO_TYPE_I :
 606                                 printf ("[INTPTR:%p], ", *((int **) curParm));
 607                                 break;
 608                         case MONO_TYPE_U :
 609                                 printf ("[UINTPTR:%p], ", *((int **) curParm));
 610                                 break;
 611                         case MONO_TYPE_BOOLEAN :
 612                                 printf ("[BOOL:%d], ", *((int *) curParm));
 613                                 break;
 614                         case MONO_TYPE_CHAR :
 615                                 printf ("[CHAR:%c], ", *((int *) curParm));
 616                                 break;
 617                         case MONO_TYPE_I1 :
 618                                 printf ("[INT1:%d], ", *((int *) curParm));
 619                                 break;
 620                         case MONO_TYPE_I2 :
 621                                 printf ("[INT2:%d], ", *((int *) curParm));
 622                                 break;
 623                         case MONO_TYPE_I4 :
 624                                 printf ("[INT4:%d], ", *((int *) curParm));
 625                                 break;
 626                         case MONO_TYPE_U1 :
 627                                 printf ("[UINT1:%u], ", *((unsigned int *) curParm));
 628                                 break;
 629                         case MONO_TYPE_U2 :
 630                                 printf ("[UINT2:%u], ", *((guint16 *) curParm));
 631                                 break;
 632                         case MONO_TYPE_U4 :
 633                                 printf ("[UINT4:%u], ", *((guint32 *) curParm));
 634                                 break;
 635                         case MONO_TYPE_U8 :
 636                                 printf ("[UINT8:%llu], ", *((guint64 *) curParm));
 637                                 break;
 638                         case MONO_TYPE_STRING : {
 639                                 MonoString *s = *((MonoString **) curParm);
 640                                 if (s) {
 641                                         g_assert (((MonoObject *) s)->vtable->klass == mono_defaults.string_class);
 642                                         printf("[STRING:%p:%s], ", s, mono_string_to_utf8(s));
 643                                 } else {
 644                                         printf("[STRING:null], ");
 645                                 }
 646                                 break;
 647                         }
 648                         case MONO_TYPE_CLASS :
 649                         case MONO_TYPE_OBJECT : {
 650                                 MonoObject *obj = *((MonoObject **) curParm);
 651                                 MonoClass *class;
 652                                 if ((obj) && (obj->vtable)) {
 653                                         printf("[CLASS/OBJ:");
 654                                         class = obj->vtable->klass;
 655                                         printf("%p [%p] ",obj,curParm);
 656 //                                      if (class == mono_defaults.string_class) {
 657 //                                              printf("[STRING:%p:%s]",
 658 //                                                     *obj, mono_string_to_utf8 (obj));
 659 //                                      } else if (class == mono_defaults.int32_class) {
 660 //                                              printf("[INT32:%p:%d]",
 661 //                                                      obj, *(gint32 *)((char *)obj + sizeof (MonoObject)));
 662 //                                      } else
 663 //                                              printf("[%s.%s:%p]",
 664 //                                                     class->name_space, class->name, obj);
 665                                         printf("], ");
 666                                 } else {
 667                                         printf("[OBJECT:null], ");
 668                                 }
 669                                 break;
 670                         }
 671                         case MONO_TYPE_PTR :
 672                                 printf("[PTR:%p], ", *((gpointer **) (curParm)));
 673                                 break;
 674                         case MONO_TYPE_FNPTR :
 675                                 printf("[FNPTR:%p], ", *((gpointer **) (curParm)));
 676                                 break;
 677                         case MONO_TYPE_ARRAY :
 678                                 printf("[ARRAY:%p], ", *((gpointer **) (curParm)));
 679                                 break;
 680                         case MONO_TYPE_SZARRAY :
 681                                 printf("[SZARRAY:%p], ", *((gpointer **) (curParm)));
 682                                 break;
 683                         case MONO_TYPE_I8 :
 684                                 printf("[INT8:%lld], ", *((gint64 *) (curParm)));
 685                                 break;
 686                         case MONO_TYPE_R4 :
 687                                 printf("[FLOAT4:%g], ", *((double *) (curParm)));
 688                                 break;
 689                         case MONO_TYPE_R8 :
 690                                 printf("[FLOAT8:%g], ", *((double *) (curParm)));
 691                                 break;
 692                         case MONO_TYPE_VALUETYPE : {
 693                                 int i;
 694                                 MonoMarshalType *info;
 695
 696                                 if (type->data.klass->enumtype) {
 697                                         simpleType = type->data.klass->enum_basetype->type;
 698                                         printf("{VALUETYPE} - ");
 699                                         goto enum_parmtype;
 700                                 }
 701
 702                                 info = mono_marshal_load_type_info (type->data.klass);
 703
 704                                 if ((info->native_size == sizeof(float)) &&
 705                                     (info->num_fields  == 1) &&
 706                                     (info->fields[0].field->type->type == MONO_TYPE_R4)) {
 707                                                 printf("[FLOAT4:%f], ", *((float *) (curParm)));
 708                                         break;
 709                                 }
 710
 711                                 if ((info->native_size == sizeof(double)) &&
 712                                     (info->num_fields  == 1) &&
 713                                     (info->fields[0].field->type->type == MONO_TYPE_R8)) {
 714                                         printf("[FLOAT8:%g], ", *((double *) (curParm)));
 715                                         break;
 716                                 }
 717
 718                                 printf("[VALUETYPE:");
 719                                 for (i = 0; i < size; i++)
 720                                         printf("%02x,", *((guint8 *)curParm+i));
 721                                 printf("]");
 722                                 break;
 723                         }
 724                         case MONO_TYPE_TYPEDBYREF: {
 725                                 int i;
 726                                 printf("[TYPEDBYREF:");
 727                                 for (i = 0; i < size; i++)
 728                                         printf("%02x,", *((guint8 *)curParm+i));
 729                                 printf("]");
 730                                 break;
 731                         }
 732                         default :
 733                                 printf("[?? - %d], ",simpleType);
 734                 }
 735         }
 736 }
 737
 738 /*========================= End of Function ========================*/
 739
 740 //static int lc = 0;
 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         MonoObject *obj;
 756         MonoMethodSignature *sig;
 757         char *fname;
 758         guint32 ip;
 759         CallInfo *cinfo;
 760         ArgInfo *ainfo;
 761         void *curParm;
 762
 763         fname = mono_method_full_name (method, TRUE);
 764         indent (1);
 765         printf ("ENTER: %s(", fname);
 766         g_free (fname);
 767
 768         ip  = (*(guint32 *) (sp+S390_RET_ADDR_OFFSET)) & 0x7fffffff;
 769         printf (") ip: %p sp: %p - ", (gpointer) ip, sp);
 770
 771         if (rParm == NULL)
 772                 return;
 773
 774         sig = mono_method_signature (method);
 775
 776         cinfo = get_call_info (NULL, NULL, sig, sig->pinvoke);
 777
 778         if (cinfo->struct_ret) {
 779                 printf ("[STRUCTRET:%p], ", (gpointer) rParm->gr[0]);
 780                 iParm = 1;
 781         }
 782
 783         if (sig->hasthis) {
 784                 gpointer *this = (gpointer *) rParm->gr[iParm];
 785                 obj = (MonoObject *) this;
 786                 if (method->klass->valuetype) {
 787                         if (obj) {
 788                                 printf("this:[value:%p:%08x], ",
 789                                        this, *((guint32 *)(this+sizeof(MonoObject))));
 790                         } else
 791                                 printf ("this:[NULL], ");
 792                 } else {
 793                         if (obj) {
 794 //                              class = obj->vtable->klass;
 795 //                              if (class == mono_defaults.string_class) {
 796 //                                      printf ("this:[STRING:%p:%s], ",
 797 //                                              obj, mono_string_to_utf8 ((MonoString *)obj));
 798 //                              } else {
 799 //                                      printf ("this:%p[%s.%s], ",
 800 //                                              obj, class->name_space, class->name);
 801 //                              }
 802 printf("this:%p, ",obj);
 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                                         curParm = &(rParm->gr[ainfo->reg-2]);
 824                                 else
 825                                         curParm = sp+ainfo->offset;
 826
 827                                 if (retFitsInReg (ainfo->vtsize))
 828                                         decodeParm(sig->params[i],
 829                                                    curParm,
 830                                                    ainfo->size);
 831                                 else
 832                                         decodeParm(sig->params[i],
 833                                                    *((char **) curParm),
 834                                                    ainfo->vtsize);
 835                                 break;
 836                         case RegTypeStructByAddr :
 837                                 if (ainfo->reg != STK_BASE)
 838                                         curParm = &(rParm->gr[ainfo->reg-2]);
 839                                 else
 840                                         curParm = sp+ainfo->offset;
 841
 842                                 decodeParm(sig->params[i],
 843                                            *((char **) curParm),
 844                                            ainfo->vtsize);
 845                                 break;
 846
 847                         default :
 848                                 printf("???, ");
 849                 }
 850         }
 851         printf("\n");
 852         g_free(cinfo);
 853 }
 854
 855 /*========================= End of Function ========================*/
 856
 857 /*------------------------------------------------------------------*/
 858 /*                                                                  */
 859 /* Name         - leave_method                                      */
 860 /*                                                                  */
 861 /* Function     -                                                   */
 862 /*                                                                  */
 863 /*------------------------------------------------------------------*/
 864
 865 static void
 866 leave_method (MonoMethod *method, ...)
 867 {
 868         MonoType *type;
 869         char *fname;
 870         guint32 ip;
 871         va_list ap;
 872
 873         va_start(ap, method);
 874
 875         fname = mono_method_full_name (method, TRUE);
 876         indent (-1);
 877         printf ("LEAVE: %s", fname);
 878         g_free (fname);
 879
 880         type = mono_method_signature (method)->ret;
 881
 882 handle_enum:
 883         switch (type->type) {
 884         case MONO_TYPE_VOID:
 885                 break;
 886         case MONO_TYPE_BOOLEAN: {
 887                 int val = va_arg (ap, int);
 888                 if (val)
 889                         printf ("[TRUE:%d]", val);
 890                 else
 891                         printf ("[FALSE]");
 892
 893                 break;
 894         }
 895         case MONO_TYPE_CHAR: {
 896                 int val = va_arg (ap, int);
 897                 printf ("[CHAR:%d]", val);
 898                 break;
 899         }
 900         case MONO_TYPE_I1: {
 901                 int val = va_arg (ap, int);
 902                 printf ("[INT1:%d]", val);
 903                 break;
 904         }
 905         case MONO_TYPE_U1: {
 906                 int val = va_arg (ap, int);
 907                 printf ("[UINT1:%d]", val);
 908                 break;
 909         }
 910         case MONO_TYPE_I2: {
 911                 int val = va_arg (ap, int);
 912                 printf ("[INT2:%d]", val);
 913                 break;
 914         }
 915         case MONO_TYPE_U2: {
 916                 int val = va_arg (ap, int);
 917                 printf ("[UINT2:%d]", val);
 918                 break;
 919         }
 920         case MONO_TYPE_I4: {
 921                 int val = va_arg (ap, int);
 922                 printf ("[INT4:%d]", val);
 923                 break;
 924         }
 925         case MONO_TYPE_U4: {
 926                 int val = va_arg (ap, int);
 927                 printf ("[UINT4:%d]", val);
 928                 break;
 929         }
 930         case MONO_TYPE_I: {
 931                 int val = va_arg (ap, int);
 932                 printf ("[INT:%d]", val);
 933                 printf("]");
 934                 break;
 935         }
 936         case MONO_TYPE_U: {
 937                 int val = va_arg (ap, int);
 938                 printf ("[UINT:%d]", val);
 939                 printf("]");
 940                 break;
 941         }
 942         case MONO_TYPE_STRING: {
 943                 MonoString *s = va_arg (ap, MonoString *);
 944 ;
 945                 if (s) {
 946                         g_assert (((MonoObject *)s)->vtable->klass == mono_defaults.string_class);
 947                         printf ("[STRING:%p:%s]", s, mono_string_to_utf8 (s));
 948                 } else
 949                         printf ("[STRING:null], ");
 950                 break;
 951         }
 952         case MONO_TYPE_CLASS:
 953         case MONO_TYPE_OBJECT: {
 954                 MonoObject *o = va_arg (ap, MonoObject *);
 955
 956 //              if ((o) && (o->vtable)) {
 957 //                      if (o->vtable->klass == mono_defaults.boolean_class) {
 958 //                              printf ("[BOOLEAN:%p:%d]", o, *((guint8 *)o + sizeof (MonoObject)));
 959 //                      } else if  (o->vtable->klass == mono_defaults.int32_class) {
 960 //                              printf ("[INT32:%p:%d]", o, *((gint32 *)((char *)o + sizeof (MonoObject))));
 961 //                      } else if  (o->vtable->klass == mono_defaults.int64_class) {
 962 //                              printf ("[INT64:%p:%lld]", o, *((gint64 *)((char *)o + sizeof (MonoObject))));
 963 //                      } else
 964 //                              printf ("[%s.%s:%p]", o->vtable->klass->name_space, o->vtable->klass->name, o);
 965 //              } else
 966                         printf ("[OBJECT:%p]", o);
 967
 968                 break;
 969         }
 970         case MONO_TYPE_PTR:
 971         case MONO_TYPE_FNPTR:
 972         case MONO_TYPE_ARRAY:
 973         case MONO_TYPE_SZARRAY: {
 974                 gpointer p = va_arg (ap, gpointer);
 975                 printf ("[result=%p]", p);
 976                 break;
 977         }
 978         case MONO_TYPE_I8: {
 979                 gint64 l =  va_arg (ap, gint64);
 980                 printf ("[LONG:%lld]", l);
 981                 break;
 982         }
 983         case MONO_TYPE_U8: {
 984                 guint64 l =  va_arg (ap, guint64);
 985                 printf ("[ULONG:%llu]", l);
 986                 break;
 987         }
 988         case MONO_TYPE_R4: {
 989                 double f;
 990                 f = va_arg (ap, double);
 991                 printf ("[FLOAT4:%g]\n", f);
 992                 break;
 993         }
 994         case MONO_TYPE_R8: {
 995                 double f = va_arg (ap, double);
 996                 printf ("[FLOAT8:%g]\n", f);
 997                 break;
 998         }
 999         case MONO_TYPE_VALUETYPE: {
1000                 MonoMarshalType *info;
1001                 if (type->data.klass->enumtype) {
1002                         type = type->data.klass->enum_basetype;
1003                         goto handle_enum;
1004                 } else {
1005                         guint8 *p = va_arg (ap, gpointer);
1006                         int j, 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                         case 2:
1030                         case 4:
1031                         case 8:
1032                                 printf ("[");
1033                                 for (j = 0; p && j < size; j++)
1034                                         printf ("%02x,", p [j]);
1035                                 printf ("]\n");
1036                                 break;
1037                         default:
1038                                 printf ("[VALUERET]\n");
1039                         }
1040                 }
1041                 break;
1042         }
1043         case MONO_TYPE_TYPEDBYREF: {
1044                 guint8 *p = va_arg (ap, gpointer);
1045                 int j, size, align;
1046                 size = mono_type_size (type, &align);
1047                 switch (size) {
1048                 case 1:
1049                 case 2:
1050                 case 4:
1051                 case 8:
1052                         printf ("[");
1053                         for (j = 0; p && j < size; j++)
1054                                 printf ("%02x,", p [j]);
1055                         printf ("]\n");
1056                         break;
1057                 default:
1058                         printf ("[TYPEDBYREF]\n");
1059                 }
1060         }
1061                 break;
1062         default:
1063                 printf ("(unknown return type %x)",
1064                         mono_method_signature (method)->ret->type);
1065         }
1066
1067         ip = ((gint32) __builtin_return_address (0)) & 0x7fffffff;
1068         printf (" ip: %p\n", (gpointer) ip);
1069 }
1070
1071 /*========================= End of Function ========================*/
1072
1073 /*------------------------------------------------------------------*/
1074 /*                                                                  */
1075 /* Name         - mono_arch_cpu_init                                */
1076 /*                                                                  */
1077 /* Function     - Perform CPU specific initialization to execute    */
1078 /*                managed code.                                     */
1079 /*                                                                  */
1080 /*------------------------------------------------------------------*/
1081
1082 void
1083 mono_arch_cpu_init (void)
1084 {
1085         guint mode = 1;
1086
1087         /*--------------------------------------*/
1088         /* Set default rounding mode for FP     */
1089         /*--------------------------------------*/
1090         __asm__ ("SRNM\t%0\n\t"
1091                 : : "m" (mode));
1092 }
1093
1094 /*========================= End of Function ========================*/
1095
1096
1097 /*
1098  * Initialize architecture specific code.
1099  */
1100 void
1101 mono_arch_init (void)
1102 {
1103 }
1104
1105 /*
1106  * Cleanup architecture specific code.
1107  */
1108 void
1109 mono_arch_cleanup (void)
1110 {
1111 }
1112
1113 /*------------------------------------------------------------------*/
1114 /*                                                                  */
1115 /* Name         - mono_arch_cpu_optimizazions                       */
1116 /*                                                                  */
1117 /* Function     - Returns the optimizations supported on this CPU   */
1118 /*                                                                  */
1119 /*------------------------------------------------------------------*/
1120
1121 guint32
1122 mono_arch_cpu_optimizazions (guint32 *exclude_mask)
1123 {
1124         guint32 opts = 0;
1125
1126         /*----------------------------------------------------------*/
1127         /* no s390-specific optimizations yet                       */
1128         /*----------------------------------------------------------*/
1129         *exclude_mask = MONO_OPT_INLINE|MONO_OPT_LINEARS;
1130 //      *exclude_mask = MONO_OPT_INLINE;
1131         return opts;
1132 }
1133
1134 /*========================= End of Function ========================*/
1135
1136 /*------------------------------------------------------------------*/
1137 /*                                                                  */
1138 /* Name         -                                                   */
1139 /*                                                                  */
1140 /* Function     -                                                   */
1141 /*                                                                  */
1142 /*------------------------------------------------------------------*/
1143
1144 static gboolean
1145 is_regsize_var (MonoType *t) {
1146         if (t->byref)
1147                 return TRUE;
1148         switch (mono_type_get_underlying_type (t)->type) {
1149         case MONO_TYPE_I4:
1150         case MONO_TYPE_U4:
1151         case MONO_TYPE_I:
1152         case MONO_TYPE_U:
1153         case MONO_TYPE_PTR:
1154         case MONO_TYPE_FNPTR:
1155                 return TRUE;
1156         case MONO_TYPE_OBJECT:
1157         case MONO_TYPE_STRING:
1158         case MONO_TYPE_CLASS:
1159         case MONO_TYPE_SZARRAY:
1160         case MONO_TYPE_ARRAY:
1161                 return FALSE;
1162         case MONO_TYPE_VALUETYPE:
1163                 if (t->data.klass->enumtype)
1164                         return is_regsize_var (t->data.klass->enum_basetype);
1165                 return FALSE;
1166         }
1167         return FALSE;
1168 }
1169
1170 /*========================= End of Function ========================*/
1171
1172 /*------------------------------------------------------------------*/
1173 /*                                                                  */
1174 /* Name         - mono_arch_get_allocatable_int_vars                */
1175 /*                                                                  */
1176 /* Function     -                                                   */
1177 /*                                                                  */
1178 /*------------------------------------------------------------------*/
1179
1180 GList *
1181 mono_arch_get_allocatable_int_vars (MonoCompile *cfg)
1182 {
1183         GList *vars = NULL;
1184         int i;
1185
1186         for (i = 0; i < cfg->num_varinfo; i++) {
1187                 MonoInst *ins = cfg->varinfo [i];
1188                 MonoMethodVar *vmv = MONO_VARINFO (cfg, i);
1189
1190                 /* unused vars */
1191                 if (vmv->range.first_use.abs_pos >= vmv->range.last_use.abs_pos)
1192                         continue;
1193
1194                 if (ins->flags & (MONO_INST_VOLATILE|MONO_INST_INDIRECT) ||
1195                     (ins->opcode != OP_LOCAL && ins->opcode != OP_ARG))
1196                         continue;
1197
1198                 /* we can only allocate 32 bit values */
1199                 if (is_regsize_var (ins->inst_vtype)) {
1200                         g_assert (MONO_VARINFO (cfg, i)->reg == -1);
1201                         g_assert (i == vmv->idx);
1202                         vars = mono_varlist_insert_sorted (cfg, vars, vmv, FALSE);
1203                 }
1204         }
1205
1206         return vars;
1207 }
1208
1209 /*========================= End of Function ========================*/
1210
1211 /*------------------------------------------------------------------*/
1212 /*                                                                  */
1213 /* Name         - mono_arch_global_int_regs                         */
1214 /*                                                                  */
1215 /* Function     - Return a list of usable integer registers.        */
1216 /*                                                                  */
1217 /*------------------------------------------------------------------*/
1218
1219 GList *
1220 mono_arch_get_global_int_regs (MonoCompile *cfg)
1221 {
1222         GList *regs = NULL;
1223         MonoMethodHeader *header;
1224         int i, top = 13;
1225
1226         header = mono_method_get_header (cfg->method);
1227         if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
1228                 cfg->frame_reg = s390_r11;
1229
1230         /* FIXME: s390_r12 is reserved for bkchain_reg. Only reserve it if needed */
1231         top = 12;
1232         for (i = 8; i < top; ++i) {
1233                 if (cfg->frame_reg != i)
1234                         regs = g_list_prepend (regs, GUINT_TO_POINTER (i));
1235         }
1236
1237         return regs;
1238 }
1239
1240 /*========================= End of Function ========================*/
1241
1242 /*------------------------------------------------------------------*/
1243 /*                                                                  */
1244 /* Name         -  mono_arch_flush_icache                           */
1245 /*                                                                  */
1246 /* Function     -  Flush the CPU icache.                            */
1247 /*                                                                  */
1248 /*------------------------------------------------------------------*/
1249
1250 void
1251 mono_arch_flush_icache (guint8 *code, gint size)
1252 {
1253 }
1254
1255 /*========================= End of Function ========================*/
1256
1257 /*------------------------------------------------------------------*/
1258 /*                                                                  */
1259 /* Name         -  mono_arch_is_inst_imm                                */
1260 /*                                                                  */
1261 /*------------------------------------------------------------------*/
1262
1263 gboolean
1264 mono_arch_is_inst_imm (gint64 imm)
1265 {
1266         /* The lowering pass will take care of it */
1267         return TRUE;
1268 }
1269
1270 /*========================= End of Function ========================*/
1271
1272 /*------------------------------------------------------------------*/
1273 /*                                                                  */
1274 /* Name         - add_general                                       */
1275 /*                                                                  */
1276 /* Function     - Determine code and stack size incremements for a  */
1277 /*                parameter.                                        */
1278 /*                                                                  */
1279 /*------------------------------------------------------------------*/
1280
1281 static void inline
1282 add_general (guint *gr, size_data *sz, ArgInfo *ainfo, gboolean simple)
1283 {
1284         int disp;
1285
1286         if (simple) {
1287                 if (*gr > S390_LAST_ARG_REG) {
1288                         sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1289                         ainfo->offset   = sz->stack_size;
1290                         ainfo->reg      = STK_BASE;
1291                         ainfo->regtype  = RegTypeBase;
1292                         sz->stack_size += sizeof(int);
1293                         sz->local_size += sizeof(int);
1294                         sz->offStruct  += sizeof(int);
1295                         sz->code_size  += 12;
1296                 } else {
1297                         ainfo->reg      = *gr;
1298                         sz->code_size  += 8;
1299                 }
1300         } else {
1301                 if (*gr > S390_LAST_ARG_REG - 1) {
1302                         disp            = sz->stack_size;
1303                         sz->stack_size  = S390_ALIGN(sz->stack_size, S390_STACK_ALIGNMENT);
1304                         disp            = sz->stack_size - disp;
1305                         ainfo->offset   = sz->stack_size;
1306                         ainfo->reg      = STK_BASE;
1307                         ainfo->regtype  = RegTypeBase;
1308                         sz->stack_size += sizeof(long long);
1309                         sz->local_size += (sizeof(long long) + disp);
1310                         sz->offStruct  += (sizeof(long long) + disp);
1311                         sz->code_size  += 10;
1312                 } else {
1313                         ainfo->reg      = *gr;
1314                         sz->code_size  += 8;
1315                 }
1316                 (*gr) ++;
1317         }
1318         (*gr) ++;
1319 }
1320
1321 /*========================= End of Function ========================*/
1322
1323 /*------------------------------------------------------------------*/
1324 /*                                                                  */
1325 /* Name         - add_stackParm                                     */
1326 /*                                                                  */
1327 /* Function     - Determine code and stack size incremements for a  */
1328 /*                parameter.                                        */
1329 /*                                                                  */
1330 /*------------------------------------------------------------------*/
1331
1332 static void inline
1333 add_stackParm (guint *gr, size_data *sz, ArgInfo *ainfo, gint size)
1334 {
1335         if (*gr > S390_LAST_ARG_REG) {
1336                 sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1337                 ainfo->reg          = STK_BASE;
1338                 ainfo->offset   = sz->stack_size;
1339                 sz->stack_size += sizeof (gpointer);
1340                 sz->parm_size  += sizeof(gpointer);
1341                 sz->offStruct  += sizeof(gpointer);
1342         } else {
1343                 ainfo->reg      = *gr;
1344                 ainfo->offset   = sz->stack_size;
1345         }
1346         (*gr) ++;
1347         ainfo->offparm  = sz->offset;
1348         sz->offset      = S390_ALIGN(sz->offset+size, sizeof(long));
1349         ainfo->size     = size;
1350         ainfo->regtype  = RegTypeStructByAddr;
1351         ainfo->vtsize   = size;
1352         sz->parm_size  += size;
1353 }
1354
1355 /*========================= End of Function ========================*/
1356
1357 /*------------------------------------------------------------------*/
1358 /*                                                                  */
1359 /* Name         - add_float                                         */
1360 /*                                                                  */
1361 /* Function     - Determine code and stack size incremements for a  */
1362 /*                float parameter.                                  */
1363 /*                                                                  */
1364 /*------------------------------------------------------------------*/
1365
1366 static void inline
1367 add_float (guint *fr,  size_data *sz, ArgInfo *ainfo)
1368 {
1369         if ((*fr) <= S390_LAST_FPARG_REG) {
1370                 ainfo->regtype = RegTypeFP;
1371                 ainfo->reg     = *fr;
1372                 sz->code_size += 4;
1373                 (*fr) += 2;
1374         }
1375         else {
1376                 ainfo->offset   = sz->stack_size;
1377                 ainfo->reg      = STK_BASE;
1378                 ainfo->regtype  = RegTypeBase;
1379                 sz->code_size  += 4;
1380                 sz->stack_size += ainfo->size;
1381                 sz->local_size += ainfo->size;
1382                 sz->offStruct  += ainfo->size;
1383         }
1384 }
1385
1386 /*========================= End of Function ========================*/
1387
1388 /*------------------------------------------------------------------*/
1389 /*                                                                  */
1390 /* Name         - get_call_info                                         */
1391 /*                                                                  */
1392 /* Function     - Determine the amount of space required for code   */
1393 /*                and stack. In addition determine starting points  */
1394 /*                for stack-based parameters, and area for struct-  */
1395 /*                ures being returned on the stack.                 */
1396 /*                                                                  */
1397 /*------------------------------------------------------------------*/
1398
1399 static CallInfo *
1400 get_call_info (MonoCompile *cfg, MonoMemPool *mp, MonoMethodSignature *sig, gboolean is_pinvoke)
1401 {
1402         guint i, fr, gr, size;
1403         int nParm = sig->hasthis + sig->param_count;
1404         MonoType *ret_type;
1405         guint32 simpletype, align;
1406         CallInfo *cinfo;
1407         size_data *sz;
1408         MonoGenericSharingContext *gsctx = cfg ? cfg->generic_sharing_context : NULL;
1409
1410         if (mp)
1411                 cinfo = mono_mempool_alloc0 (mp, sizeof (CallInfo) + sizeof (ArgInfo) * nParm);
1412         else
1413                 cinfo = g_malloc0 (sizeof (CallInfo) + sizeof (ArgInfo) * nParm);
1414
1415         fr                = 0;
1416         gr                = s390_r2;
1417         nParm                 = 0;
1418         cinfo->struct_ret = 0;
1419         sz                = &cinfo->sz;
1420         sz->offset            = 0;
1421         sz->offStruct     = S390_MINIMAL_STACK_SIZE;
1422         sz->retStruct     = 0;
1423         sz->stack_size    = S390_MINIMAL_STACK_SIZE;
1424         sz->code_size     = 0;
1425         sz->parm_size     = 0;
1426         sz->local_size    = 0;
1427
1428         /*----------------------------------------------------------*/
1429         /* We determine the size of the return code/stack in case we*/
1430         /* need to reserve a register to be used to address a stack */
1431         /* area that the callee will use.                           */
1432         /*----------------------------------------------------------*/
1433
1434         ret_type = mono_type_get_underlying_type (sig->ret);
1435         ret_type = mini_get_basic_type_from_generic (gsctx, ret_type);
1436         simpletype = ret_type->type;
1437 enum_retvalue:
1438         switch (simpletype) {
1439                 case MONO_TYPE_BOOLEAN:
1440                 case MONO_TYPE_I1:
1441                 case MONO_TYPE_U1:
1442                 case MONO_TYPE_I2:
1443                 case MONO_TYPE_U2:
1444                 case MONO_TYPE_CHAR:
1445                 case MONO_TYPE_I4:
1446                 case MONO_TYPE_U4:
1447                 case MONO_TYPE_I:
1448                 case MONO_TYPE_U:
1449                 case MONO_TYPE_CLASS:
1450                 case MONO_TYPE_OBJECT:
1451                 case MONO_TYPE_SZARRAY:
1452                 case MONO_TYPE_ARRAY:
1453                 case MONO_TYPE_PTR:
1454                 case MONO_TYPE_FNPTR:
1455                 case MONO_TYPE_STRING:
1456                         cinfo->ret.reg = s390_r2;
1457                         sz->code_size += 4;
1458                         break;
1459                 case MONO_TYPE_R4:
1460                 case MONO_TYPE_R8:
1461                         cinfo->ret.reg = s390_f0;
1462                         sz->code_size += 4;
1463                         break;
1464                 case MONO_TYPE_I8:
1465                 case MONO_TYPE_U8:
1466                         cinfo->ret.reg = s390_r2;
1467                         sz->code_size += 4;
1468                         break;
1469                 case MONO_TYPE_GENERICINST:
1470                         if (!mono_type_generic_inst_is_valuetype (sig->ret)) {
1471                                 cinfo->ret.reg = s390_r2;
1472                                 sz->code_size += 4;
1473                                 break;
1474                         }
1475                         /* Fall through */
1476                 case MONO_TYPE_VALUETYPE: {
1477                         MonoClass *klass = mono_class_from_mono_type (sig->ret);
1478                         if (klass->enumtype) {
1479                                 simpletype = klass->enum_basetype->type;
1480                                 goto enum_retvalue;
1481                         }
1482                         if (sig->pinvoke)
1483                                 size = mono_class_native_size (klass, &align);
1484                         else
1485                                 size = mono_class_value_size (klass, &align);
1486
1487                         cinfo->ret.reg    = s390_r2;
1488                         cinfo->struct_ret = 1;
1489                         cinfo->ret.size   = size;
1490                         cinfo->ret.vtsize = size;
1491                         gr++;
1492                         break;
1493                 }
1494                 case MONO_TYPE_TYPEDBYREF:
1495                         size = sizeof (MonoTypedRef);
1496                         cinfo->ret.reg    = s390_r2;
1497                         cinfo->struct_ret = 1;
1498                         cinfo->ret.size   = size;
1499                         cinfo->ret.vtsize = size;
1500                         gr++;
1501                         break;
1502                 case MONO_TYPE_VOID:
1503                         break;
1504                 default:
1505                         g_error ("mini-s390: cannot handle as return value 0x%x (0x%x)", sig->ret->type,simpletype);
1506         }
1507
1508         if (sig->hasthis) {
1509                 add_general (&gr, sz, cinfo->args+nParm, TRUE);
1510                 cinfo->args[nParm].size = sizeof(gpointer);
1511                 nParm++;
1512         }
1513
1514         /*----------------------------------------------------------*/
1515         /* We determine the size of the parameter code and stack    */
1516         /* requirements by checking the types and sizes of the      */
1517         /* parameters.                                              */
1518         /*----------------------------------------------------------*/
1519
1520         for (i = 0; i < sig->param_count; ++i) {
1521                 MonoType *ptype;
1522
1523                 /*--------------------------------------------------*/
1524                 /* Handle vararg type calls. All args are put on    */
1525                 /* the stack.                                       */
1526                 /*--------------------------------------------------*/
1527                 if ((sig->call_convention == MONO_CALL_VARARG) &&
1528                     (i == sig->sentinelpos)) {
1529                         gr = S390_LAST_ARG_REG + 1;
1530                         add_general (&gr, sz, &cinfo->sigCookie, TRUE);
1531                 }
1532
1533                 if (sig->params [i]->byref) {
1534                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1535                         cinfo->args[nParm].size = sizeof(gpointer);
1536                         nParm++;
1537                         continue;
1538                 }
1539
1540                 ptype = mono_type_get_underlying_type (sig->params [i]);
1541                 ptype = mini_get_basic_type_from_generic (gsctx, ptype);
1542                 simpletype = ptype->type;
1543                 switch (simpletype) {
1544                 case MONO_TYPE_BOOLEAN:
1545                 case MONO_TYPE_I1:
1546                 case MONO_TYPE_U1:
1547                         cinfo->args[nParm].size = sizeof(char);
1548                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1549                         nParm++;
1550                         break;
1551                 case MONO_TYPE_I2:
1552                 case MONO_TYPE_U2:
1553                 case MONO_TYPE_CHAR:
1554                         cinfo->args[nParm].size = sizeof(short);
1555                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1556                         nParm++;
1557                         break;
1558                 case MONO_TYPE_I4:
1559                 case MONO_TYPE_U4:
1560                         cinfo->args[nParm].size = sizeof(int);
1561                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1562                         nParm++;
1563                         break;
1564                 case MONO_TYPE_I:
1565                 case MONO_TYPE_U:
1566                 case MONO_TYPE_PTR:
1567                 case MONO_TYPE_FNPTR:
1568                 case MONO_TYPE_CLASS:
1569                 case MONO_TYPE_OBJECT:
1570                 case MONO_TYPE_STRING:
1571                 case MONO_TYPE_SZARRAY:
1572                 case MONO_TYPE_ARRAY:
1573                         cinfo->args[nParm].size = sizeof(gpointer);
1574                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1575                         nParm++;
1576                         break;
1577                 case MONO_TYPE_I8:
1578                 case MONO_TYPE_U8:
1579                         cinfo->args[nParm].size = sizeof(long long);
1580                         add_general (&gr, sz, cinfo->args+nParm, FALSE);
1581                         nParm++;
1582                         break;
1583                 case MONO_TYPE_R4:
1584                         cinfo->args[nParm].size = sizeof(float);
1585                         add_float (&fr, sz, cinfo->args+nParm);
1586                         nParm++;
1587                         break;
1588                 case MONO_TYPE_R8:
1589                         cinfo->args[nParm].size = sizeof(double);
1590                         add_float (&fr, sz, cinfo->args+nParm);
1591                         nParm++;
1592                         break;
1593                 case MONO_TYPE_GENERICINST:
1594                         if (!mono_type_generic_inst_is_valuetype (sig->params [i])) {
1595                                 cinfo->args[nParm].size = sizeof(gpointer);
1596                                 add_general (&gr, sz, cinfo->args+nParm, TRUE);
1597                                 nParm++;
1598                                 break;
1599                         }
1600                         /* Fall through */
1601                 case MONO_TYPE_VALUETYPE: {
1602                         MonoMarshalType *info;
1603                         MonoClass *klass = mono_class_from_mono_type (sig->params [i]);
1604                         if (sig->pinvoke)
1605                                 size = mono_class_native_size (klass, &align);
1606                         else
1607                                 size = mono_class_value_size (klass, &align);
1608
1609                         info = mono_marshal_load_type_info (klass);
1610
1611                         if ((info->native_size == sizeof(float)) &&
1612                             (info->num_fields  == 1) &&
1613                             (info->fields[0].field->type->type == MONO_TYPE_R4)) {
1614                                 cinfo->args[nParm].size = sizeof(float);
1615                                 add_float(&fr, sz, cinfo->args+nParm);
1616                                 nParm ++;
1617                                 break;
1618                         }
1619
1620                         if ((info->native_size == sizeof(double)) &&
1621                             (info->num_fields  == 1) &&
1622                             (info->fields[0].field->type->type == MONO_TYPE_R8)) {
1623                                 cinfo->args[nParm].size = sizeof(double);
1624                                 add_float(&fr, sz, cinfo->args+nParm);
1625                                 nParm ++;
1626                                 break;
1627                         }
1628
1629                         cinfo->args[nParm].vtsize  = 0;
1630                         cinfo->args[nParm].size    = 0;
1631
1632                         switch (size) {
1633                                 /*----------------------------------*/
1634                                 /* On S/390, structures of size 1,  */
1635                                 /* 2, 4, and 8 bytes are passed in  */
1636                                 /* (a) register(s).                 */
1637                                 /*----------------------------------*/
1638                                 case 0:
1639                                 case 1:
1640                                 case 2:
1641                                 case 4:
1642                                         add_general(&gr, sz, cinfo->args+nParm, TRUE);
1643                                         cinfo->args[nParm].size    = size;
1644                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1645                                         nParm++;
1646                                         sz->local_size            += sizeof(long);
1647                                         break;
1648                                 case 8:
1649                                         add_general(&gr, sz, cinfo->args+nParm, FALSE);
1650                                         cinfo->args[nParm].size    = sizeof(long long);
1651                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1652                                         nParm++;
1653                                         sz->local_size            += sizeof(long long);
1654                                         break;
1655                                 default:
1656                                         add_stackParm(&gr, sz, cinfo->args+nParm, size);
1657                                         nParm++;
1658                         }
1659                 }
1660                         break;
1661                 case MONO_TYPE_TYPEDBYREF: {
1662                         int size = sizeof (MonoTypedRef);
1663
1664                         cinfo->args[nParm].vtsize  = 0;
1665                         cinfo->args[nParm].size    = 0;
1666
1667                         switch (size) {
1668                                 /*----------------------------------*/
1669                                 /* On S/390, structures of size 1,  */
1670                                 /* 2, 4, and 8 bytes are passed in  */
1671                                 /* (a) register(s).                 */
1672                                 /*----------------------------------*/
1673                                 case 0:
1674                                 case 1:
1675                                 case 2:
1676                                 case 4:
1677                                         add_general(&gr, sz, cinfo->args+nParm, TRUE);
1678                                         cinfo->args[nParm].size    = size;
1679                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1680                                         nParm++;
1681                                         sz->local_size            += sizeof(long);
1682                                         break;
1683                                 case 8:
1684                                         add_general(&gr, sz, cinfo->args+nParm, FALSE);
1685                                         cinfo->args[nParm].size    = sizeof(long long);
1686                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1687                                         nParm++;
1688                                         sz->local_size            += sizeof(long long);
1689                                         break;
1690                                 default:
1691                                         add_stackParm(&gr, sz, cinfo->args+nParm, size);
1692                                         nParm++;
1693                         }
1694                 }
1695                         break;
1696                 default:
1697                         g_error ("Can't trampoline 0x%x", sig->params [i]->type);
1698                 }
1699         }
1700
1701         /*----------------------------------------------------------*/
1702         /* If we are passing a structure back then if it won't be   */
1703         /* in a register(s) then we make room at the end of the     */
1704         /* parameters that may have been placed on the stack        */
1705         /*----------------------------------------------------------*/
1706         if (cinfo->struct_ret) {
1707                 cinfo->ret.offset = sz->stack_size;
1708                 switch (cinfo->ret.size) {
1709                 case 0:
1710                 case 1:
1711                 case 2:
1712                 case 4:
1713                 case 8:
1714                         break;
1715                 default:
1716                         sz->stack_size   += S390_ALIGN(cinfo->ret.size, align);
1717                 }
1718         }
1719
1720         /*----------------------------------------------------------*/
1721         /* Handle the case where there are no implicit arguments    */
1722         /*----------------------------------------------------------*/
1723         if ((sig->call_convention == MONO_CALL_VARARG) &&
1724             (sig->param_count == sig->sentinelpos)) {
1725                 gr = S390_LAST_ARG_REG + 1;
1726                 add_general (&gr, sz, &cinfo->sigCookie, TRUE);
1727         }
1728
1729         cinfo->lastgr   = gr;
1730         sz->stack_size  = sz->stack_size + sz->local_size + sz->parm_size +
1731                           sz->offset;
1732         sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1733
1734         return (cinfo);
1735 }
1736
1737 /*========================= End of Function ========================*/
1738
1739 /*------------------------------------------------------------------*/
1740 /*                                                                  */
1741 /* Name         - mono_arch_allocate_vars                           */
1742 /*                                                                  */
1743 /* Function     - Set var information according to the calling      */
1744 /*                convention for S/390. The local var stuff should  */
1745 /*                most likely be split in another method.           */
1746 /*                                                                  */
1747 /* Parameter    - @m - Compile unit.                                */
1748 /*                                                                  */
1749 /*------------------------------------------------------------------*/
1750
1751 void
1752 mono_arch_allocate_vars (MonoCompile *cfg)
1753 {
1754         MonoMethodSignature *sig;
1755         MonoMethodHeader *header;
1756         MonoInst *inst;
1757         CallInfo *cinfo;
1758         int iParm, iVar, offset, size, align, curinst;
1759         int frame_reg = STK_BASE;
1760         int sArg, eArg;
1761
1762         header  = mono_method_get_header (cfg->method);
1763
1764         cfg->flags |= MONO_CFG_HAS_SPILLUP;
1765
1766         sig     = mono_method_signature (cfg->method);
1767
1768         cinfo   = get_call_info (cfg, cfg->mempool, sig, sig->pinvoke);
1769
1770         /*---------------------------------------------------------*/
1771         /* We use the frame register also for any method that has  */
1772         /* filter clauses. This way, when the handlers are called, */
1773         /* the code will reference local variables using the frame */
1774         /* reg instead of the stack pointer: if we had to restore  */
1775         /* the stack pointer, we'd corrupt the method frames that  */
1776         /* are already on the stack (since filters get called      */
1777         /* before stack unwinding happens) when the filter code    */
1778         /* would call any method.                                  */
1779         /*---------------------------------------------------------*/
1780         if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
1781                 frame_reg = s390_r11;
1782
1783         cfg->frame_reg = frame_reg;
1784
1785         cfg->arch.bkchain_reg = -1;
1786
1787         if (frame_reg != STK_BASE)
1788                 cfg->used_int_regs |= 1 << frame_reg;
1789
1790         sig     = mono_method_signature (cfg->method);
1791
1792         cinfo   = get_call_info (cfg, cfg->mempool, sig, sig->pinvoke);
1793
1794         if (!cinfo->struct_ret) {
1795                 switch (mono_type_get_underlying_type (sig->ret)->type) {
1796                 case MONO_TYPE_VOID:
1797                         break;
1798                 default:
1799                         cfg->ret->opcode = OP_REGVAR;
1800                         cfg->ret->dreg   = s390_r2;
1801                         break;
1802                 }
1803         }
1804
1805         /*--------------------------------------------------------------*/
1806         /* local vars are at a positive offset from the stack pointer   */
1807         /* also note that if the function uses alloca, we use s390_r11  */
1808         /* to point at the local variables.                             */
1809         /* add parameter area size for called functions                 */
1810         /*--------------------------------------------------------------*/
1811         offset          = (cfg->param_area + S390_MINIMAL_STACK_SIZE);
1812         cfg->sig_cookie = 0;
1813
1814         if (cinfo->struct_ret) {
1815                 inst               = cfg->vret_addr;
1816                 offset             = S390_ALIGN(offset, sizeof(gpointer));
1817                 inst->inst_offset  = offset;
1818                 inst->opcode       = OP_REGOFFSET;
1819                 inst->inst_basereg = frame_reg;
1820                 offset            += sizeof(gpointer);
1821                 if (G_UNLIKELY (cfg->verbose_level > 1)) {
1822                         printf ("vret_addr =");
1823                         mono_print_ins (cfg->vret_addr);
1824                 }
1825         }
1826
1827         if (sig->hasthis) {
1828                 inst = cfg->args [0];
1829                 if (inst->opcode != OP_REGVAR) {
1830                         inst->opcode       = OP_REGOFFSET;
1831                         inst->inst_basereg = frame_reg;
1832                         offset             = S390_ALIGN(offset, sizeof(gpointer));
1833                         inst->inst_offset  = offset;
1834                         offset            += sizeof (gpointer);
1835                 }
1836                 curinst = sArg = 1;
1837         } else {
1838                 curinst = sArg = 0;
1839         }
1840
1841         eArg = sig->param_count + sArg;
1842
1843         if (sig->call_convention == MONO_CALL_VARARG)
1844                 cfg->sig_cookie += S390_MINIMAL_STACK_SIZE;
1845
1846         for (iParm = sArg; iParm < eArg; ++iParm) {
1847                 inst = cfg->args [curinst];
1848                 if (inst->opcode != OP_REGVAR) {
1849                         switch (cinfo->args[iParm].regtype) {
1850                             case RegTypeStructByAddr : {
1851                                         MonoInst *indir;
1852
1853                                         size = sizeof (gpointer);
1854
1855                                         if (cinfo->args [iParm].reg == STK_BASE) {
1856                                                 cfg->arch.bkchain_reg = s390_r12;
1857                                                 cfg->used_int_regs |= 1 << cfg->arch.bkchain_reg;
1858
1859                                                 inst->opcode       = OP_REGOFFSET;
1860                                                 inst->inst_basereg = cfg->arch.bkchain_reg;
1861                                                 inst->inst_offset  = cinfo->args [iParm].offset;
1862                                         } else {
1863                                                 inst->opcode = OP_REGOFFSET;
1864                                                 inst->inst_basereg = frame_reg;
1865                                                 inst->inst_offset = S390_ALIGN(offset, sizeof (gpointer));
1866                                         }
1867
1868                                         /* Add a level of indirection */
1869                                         MONO_INST_NEW (cfg, indir, 0);
1870                                         *indir = *inst;
1871                                         inst->opcode = OP_VTARG_ADDR;
1872                                         inst->inst_left = indir;
1873                                 }
1874                                         break;
1875                                 case RegTypeStructByVal :
1876                                         size               = cinfo->args[iParm].size;
1877                                         offset             = S390_ALIGN(offset, size);
1878                                         inst->opcode = OP_REGOFFSET;
1879                                         inst->inst_basereg = frame_reg;
1880                                         inst->inst_offset = S390_ALIGN (offset, size);
1881                                         break;
1882                                 default :
1883                                         if (cinfo->args [iParm].reg == STK_BASE) {
1884                                                 /*
1885                                                  * These arguments are in the previous frame, so we can't
1886                                                  * compute their offset from the current frame pointer right
1887                                                  * now, since cfg->stack_offset is not yet known, so dedicate a
1888                                                  * register holding the previous frame pointer.
1889                                                  */
1890                                                 cfg->arch.bkchain_reg = s390_r12;
1891                                                 cfg->used_int_regs |= 1 << cfg->arch.bkchain_reg;
1892
1893                                                 inst->opcode       = OP_REGOFFSET;
1894                                                 inst->inst_basereg = cfg->arch.bkchain_reg;
1895                                                 size               = (cinfo->args[iParm].size < 4
1896                                                                                   ? 4 - cinfo->args[iParm].size
1897                                                                                   : 0);
1898                                                 inst->inst_offset  = cinfo->args [iParm].offset + size;
1899                                                 size = sizeof (long);
1900                                         } else {
1901                                                 inst->opcode       = OP_REGOFFSET;
1902                                                 inst->inst_basereg = frame_reg;
1903                                                 size               = (cinfo->args[iParm].size < 8
1904                                                                                   ? sizeof(long)
1905                                                                                   : sizeof(long long));
1906                                                 offset             = S390_ALIGN(offset, size);
1907                                                 inst->inst_offset  = offset;
1908                                         }
1909                         }
1910                         if ((sig->call_convention == MONO_CALL_VARARG) &&
1911                             (cinfo->args[iParm].regtype != RegTypeGeneral) &&
1912                             (iParm < sig->sentinelpos))
1913                                 cfg->sig_cookie += size;
1914
1915                         offset += size;
1916                 }
1917                 curinst++;
1918         }
1919
1920         curinst = cfg->locals_start;
1921         for (iVar = curinst; iVar < cfg->num_varinfo; ++iVar) {
1922                 inst = cfg->varinfo [iVar];
1923                 if ((inst->flags & MONO_INST_IS_DEAD) ||
1924                     (inst->opcode == OP_REGVAR))
1925                         continue;
1926
1927                 /*--------------------------------------------------*/
1928                 /* inst->backend.is_pinvoke indicates native sized value types, */
1929                 /* this is used by the pinvoke wrappers when they   */
1930                 /* call functions returning structure               */
1931                 /*--------------------------------------------------*/
1932                 if (inst->backend.is_pinvoke && MONO_TYPE_ISSTRUCT (inst->inst_vtype))
1933                         size = mono_class_native_size (mono_class_from_mono_type(inst->inst_vtype), &align);
1934                 else
1935                         size = mono_type_size (inst->inst_vtype, &align);
1936
1937                 offset             = S390_ALIGN(offset, align);
1938                 inst->inst_offset  = offset;
1939                 inst->opcode       = OP_REGOFFSET;
1940                 inst->inst_basereg = frame_reg;
1941                 offset            += size;
1942                 DEBUG (g_print("allocating local %d to %ld\n", iVar, inst->inst_offset));
1943         }
1944
1945         /*------------------------------------------------------*/
1946         /* Allow space for the trace method stack area if needed*/
1947         /*------------------------------------------------------*/
1948         if (mono_jit_trace_calls != NULL && mono_trace_eval (cfg->method)) {
1949                 offset += S390_TRACE_STACK_SIZE;
1950         }
1951
1952         /*------------------------------------------------------*/
1953         /* Reserve space to save LMF and caller saved registers */
1954         /*------------------------------------------------------*/
1955         if (cfg->method->save_lmf)
1956                 offset += sizeof (MonoLMF);
1957
1958         /*------------------------------------------------------*/
1959         /* align the offset                                     */
1960         /*------------------------------------------------------*/
1961         cfg->stack_offset = S390_ALIGN(offset, S390_STACK_ALIGNMENT);
1962
1963         /* Fix up offsets for arguments whose value is in the parent frame */
1964         for (iParm = sArg; iParm < eArg; ++iParm) {
1965                 inst = cfg->args [iParm];
1966
1967                 if (inst->opcode == OP_S390_STKARG) {
1968                         inst->opcode = OP_REGOFFSET;
1969                         inst->inst_offset += cfg->stack_offset;
1970                 }
1971         }
1972 }
1973
1974 /*========================= End of Function ========================*/
1975
1976 /*------------------------------------------------------------------*/
1977 /*                                                                  */
1978 /* Name         - mono_arch_create_vars                                 */
1979 /*                                                                  */
1980 /*------------------------------------------------------------------*/
1981
1982 void
1983 mono_arch_create_vars (MonoCompile *cfg)
1984 {
1985         MonoMethodSignature *sig;
1986         CallInfo *cinfo;
1987
1988         sig = mono_method_signature (cfg->method);
1989
1990         cinfo = get_call_info (cfg, cfg->mempool, sig, sig->pinvoke);
1991
1992         if (cinfo->struct_ret) {
1993                 cfg->vret_addr = mono_compile_create_var (cfg, &mono_defaults.int_class->byval_arg, OP_ARG);
1994                 if (G_UNLIKELY (cfg->verbose_level > 1)) {
1995                         printf ("vret_addr = ");
1996                         mono_print_ins (cfg->vret_addr);
1997                 }
1998         }
1999 }
2000
2001 /*========================= End of Function ========================*/
2002
2003 static void
2004 add_outarg_reg2 (MonoCompile *cfg, MonoCallInst *call, ArgStorage storage, int reg, MonoInst *tree)
2005 {
2006         MonoInst *ins;
2007
2008         switch (storage) {
2009         case RegTypeGeneral:
2010                 MONO_INST_NEW (cfg, ins, OP_MOVE);
2011                 ins->dreg = mono_alloc_ireg (cfg);
2012                 ins->sreg1 = tree->dreg;
2013                 MONO_ADD_INS (cfg->cbb, ins);
2014                 mono_call_inst_add_outarg_reg (cfg, call, ins->dreg, reg, FALSE);
2015                 break;
2016         case RegTypeFP:
2017                 MONO_INST_NEW (cfg, ins, OP_FMOVE);
2018                 ins->dreg = mono_alloc_freg (cfg);
2019                 ins->sreg1 = tree->dreg;
2020                 MONO_ADD_INS (cfg->cbb, ins);
2021                 mono_call_inst_add_outarg_reg (cfg, call, ins->dreg, reg, TRUE);
2022                 break;
2023         case RegTypeFPR4:
2024                 MONO_INST_NEW (cfg, ins, OP_S390_SETF4RET);
2025                 ins->dreg = mono_alloc_freg (cfg);
2026                 ins->sreg1 = tree->dreg;
2027                 MONO_ADD_INS (cfg->cbb, ins);
2028                 mono_call_inst_add_outarg_reg (cfg, call, ins->dreg, reg, TRUE);
2029                 break;
2030         default:
2031                 g_assert_not_reached ();
2032         }
2033 }
2034
2035 static void
2036 emit_sig_cookie (MonoCompile *cfg, MonoCallInst *call, CallInfo *cinfo)
2037 {
2038         MonoMethodSignature *tmpSig;
2039         MonoInst *sig_arg;
2040
2041         cfg->disable_aot = TRUE;
2042
2043         /*----------------------------------------------------------*/
2044         /* mono_ArgIterator_Setup assumes the signature cookie is   */
2045         /* passed first and all the arguments which were before it  */
2046         /* passed on the stack after the signature. So compensate   */
2047         /* by passing a different signature.                        */
2048         /*----------------------------------------------------------*/
2049         tmpSig = mono_metadata_signature_dup (call->signature);
2050         tmpSig->param_count -= call->signature->sentinelpos;
2051         tmpSig->sentinelpos  = 0;
2052         if (tmpSig->param_count > 0)
2053                 memcpy (tmpSig->params,
2054                         call->signature->params + call->signature->sentinelpos,
2055                         tmpSig->param_count * sizeof(MonoType *));
2056
2057         MONO_INST_NEW (cfg, sig_arg, OP_ICONST);
2058         sig_arg->dreg = mono_alloc_ireg (cfg);
2059         sig_arg->inst_p0 = tmpSig;
2060         MONO_ADD_INS (cfg->cbb, sig_arg);
2061
2062         MONO_EMIT_NEW_STORE_MEMBASE (cfg, OP_STORE_MEMBASE_REG, STK_BASE,
2063                                                                  cinfo->sigCookie.offset, sig_arg->dreg);
2064 }
2065
2066 /*------------------------------------------------------------------*/
2067 /*                                                                  */
2068 /* Name         - mono_arch_emit_call                                   */
2069 /*                                                                  */
2070 /*------------------------------------------------------------------*/
2071
2072 void
2073 mono_arch_emit_call (MonoCompile *cfg, MonoCallInst *call)
2074 {
2075         MonoInst *in;
2076         MonoMethodSignature *sig;
2077         MonoInst *ins;
2078         int i, n, lParamArea;
2079         CallInfo *cinfo;
2080         ArgInfo *ainfo = NULL;
2081         int stackSize;
2082
2083         sig = call->signature;
2084         n = sig->param_count + sig->hasthis;
2085         DEBUG (g_print ("Call requires: %d parameters\n",n));
2086
2087         cinfo = get_call_info (cfg, cfg->mempool, sig, sig->pinvoke);
2088
2089         stackSize         = cinfo->sz.stack_size + cinfo->sz.local_size + cinfo->sz.parm_size + cinfo->sz.offset;
2090         call->stack_usage = MAX(stackSize, call->stack_usage);
2091         lParamArea        = MAX((call->stack_usage-S390_MINIMAL_STACK_SIZE-cinfo->sz.parm_size), 0);
2092         cfg->param_area   = MAX(((signed) cfg->param_area), lParamArea);
2093         cfg->flags       |= MONO_CFG_HAS_CALLS;
2094
2095         if (cinfo->struct_ret) {
2096                 MONO_INST_NEW (cfg, ins, OP_MOVE);
2097                 ins->sreg1 = call->vret_var->dreg;
2098                 ins->dreg = mono_alloc_preg (cfg);
2099                 MONO_ADD_INS (cfg->cbb, ins);
2100                 mono_call_inst_add_outarg_reg (cfg, call, ins->dreg, cinfo->ret.reg, FALSE);
2101         }
2102
2103         for (i = 0; i < n; ++i) {
2104                 ainfo = cinfo->args + i;
2105                 MonoType *t;
2106
2107                 if (i >= sig->hasthis)
2108                         t = sig->params [i - sig->hasthis];
2109                 else
2110                         t = &mono_defaults.int_class->byval_arg;
2111                 t = mono_type_get_underlying_type (t);
2112
2113                 in = call->args [i];
2114
2115                 if ((sig->call_convention == MONO_CALL_VARARG) &&
2116                     (i == sig->sentinelpos)) {
2117                         emit_sig_cookie (cfg, call, cinfo);
2118                 }
2119
2120                 switch (ainfo->regtype) {
2121                 case RegTypeGeneral:
2122                         if (!t->byref && (t->type == MONO_TYPE_I8 || t->type == MONO_TYPE_U8)) {
2123                                 MONO_INST_NEW (cfg, ins, OP_MOVE);
2124                                 ins->dreg = mono_alloc_ireg (cfg);
2125                                 ins->sreg1 = in->dreg + 2;
2126                                 MONO_ADD_INS (cfg->cbb, ins);
2127                                 mono_call_inst_add_outarg_reg (cfg, call, ins->dreg, ainfo->reg, FALSE);
2128                                 MONO_INST_NEW (cfg, ins, OP_MOVE);
2129                                 ins->dreg = mono_alloc_ireg (cfg);
2130                                 ins->sreg1 = in->dreg + 1;
2131                                 MONO_ADD_INS (cfg->cbb, ins);
2132                                 mono_call_inst_add_outarg_reg (cfg, call, ins->dreg, ainfo->reg + 1, FALSE);
2133                         } else {
2134                                 add_outarg_reg2 (cfg, call, ainfo->regtype, ainfo->reg, in);
2135                         }
2136                         break;
2137                 case RegTypeFP:
2138                         if (MONO_TYPE_ISSTRUCT (t)) {
2139                                 /* Valuetype passed in one fp register */
2140                                 ainfo->regtype = RegTypeStructByValInFP;
2141                                 /* Fall through */
2142                         } else {
2143                                 if (ainfo->size == 4)
2144                                         ainfo->regtype = RegTypeFPR4;
2145                                 add_outarg_reg2 (cfg, call, ainfo->regtype, ainfo->reg, in);
2146                                 break;
2147                         }
2148                 case RegTypeStructByVal:
2149                 case RegTypeStructByAddr: {
2150                         guint32 align;
2151                         guint32 size;
2152
2153                         if (sig->params [i - sig->hasthis]->type == MONO_TYPE_TYPEDBYREF) {
2154                                 size = sizeof (MonoTypedRef);
2155                                 align = sizeof (gpointer);
2156                         }
2157                         else
2158                                 if (sig->pinvoke)
2159                                         size = mono_type_native_stack_size (&in->klass->byval_arg, &align);
2160                                 else {
2161                                         /*
2162                                          * Other backends use mono_type_stack_size (), but that
2163                                          * aligns the size to 8, which is larger than the size of
2164                                          * the source, leading to reads of invalid memory if the
2165                                          * source is at the end of address space.
2166                                          */
2167                                         size = mono_class_value_size (in->klass, &align);
2168                                 }
2169
2170                         g_assert (in->klass);
2171
2172                         ainfo->offparm += cinfo->sz.offStruct;
2173
2174                         MONO_INST_NEW (cfg, ins, OP_OUTARG_VT);
2175                         ins->sreg1 = in->dreg;
2176                         ins->klass = in->klass;
2177                         ins->backend.size = ainfo->size;
2178                         ins->inst_p0 = call;
2179                         ins->inst_p1 = mono_mempool_alloc (cfg->mempool, sizeof (ArgInfo));
2180                         memcpy (ins->inst_p1, ainfo, sizeof (ArgInfo));
2181
2182                         MONO_ADD_INS (cfg->cbb, ins);
2183
2184                         if (ainfo->regtype == RegTypeStructByAddr) {
2185                                 /*
2186                                  * We use OP_OUTARG_VT to copy the valuetype to a stack location, then
2187                                  * use the normal OUTARG opcodes to pass the address of the location to
2188                                  * the callee.
2189                                  */
2190                                 int treg = mono_alloc_preg (cfg);
2191                                 MONO_EMIT_NEW_BIALU_IMM (cfg, OP_ADD_IMM, treg,
2192                                                                                  STK_BASE, ainfo->offparm);
2193                                 if (ainfo->reg == STK_BASE) {
2194                                         /* The address is passed on the stack */
2195                                         MONO_INST_NEW (cfg, ins, OP_STORE_MEMBASE_REG);
2196                                         ins->inst_destbasereg = STK_BASE;
2197                                         ins->inst_offset = ainfo->offset;
2198                                         ins->sreg1 = treg;
2199                                         MONO_ADD_INS (cfg->cbb, ins);
2200                                 } else {
2201                                         mono_call_inst_add_outarg_reg (cfg, call, treg, ainfo->reg, FALSE);
2202                                 }
2203                         }
2204                         break;
2205                 }
2206                 case RegTypeBase:
2207                         if (!t->byref && t->type == MONO_TYPE_R4) {
2208                                 MONO_EMIT_NEW_STORE_MEMBASE (cfg, OP_STORER4_MEMBASE_REG,
2209                                                                                          STK_BASE, ainfo->offset,
2210                                                                                          in->dreg);
2211                         } else if (!t->byref && (t->type == MONO_TYPE_R8)) {
2212                                 MONO_EMIT_NEW_STORE_MEMBASE (cfg, OP_STORER8_MEMBASE_REG,
2213                                                                                          STK_BASE, ainfo->offset,
2214                                                                                          in->dreg);
2215                         } else if (!t->byref && (t->type == MONO_TYPE_I8 || t->type == MONO_TYPE_U8)) {
2216                                 MONO_INST_NEW (cfg, ins, OP_STORE_MEMBASE_REG);
2217                                 ins->inst_destbasereg = STK_BASE;
2218                                 ins->inst_offset = ainfo->offset + MINI_LS_WORD_OFFSET;
2219                                 ins->sreg1 = in->dreg + 1;
2220                                 MONO_ADD_INS (cfg->cbb, ins);
2221
2222                                 MONO_INST_NEW (cfg, ins, OP_STORE_MEMBASE_REG);
2223                                 ins->inst_destbasereg = STK_BASE;
2224                                 ins->inst_offset = ainfo->offset + MINI_MS_WORD_OFFSET;
2225                                 ins->sreg1 = in->dreg + 2;
2226                                 MONO_ADD_INS (cfg->cbb, ins);
2227                         } else {
2228                                 MONO_INST_NEW (cfg, ins, OP_STORE_MEMBASE_REG);
2229                                 ins->inst_destbasereg = STK_BASE;
2230                                 ins->inst_offset = ainfo->offset;
2231                                 ins->sreg1 = in->dreg;
2232                                 MONO_ADD_INS (cfg->cbb, ins);
2233                         }
2234                         break;
2235                 default:
2236                         g_assert_not_reached ();
2237                         break;
2238                 }
2239         }
2240
2241         /*
2242          * Handle the case where there are no implicit arguments
2243          */
2244         if ((sig->call_convention == MONO_CALL_VARARG) &&
2245             (i == sig->sentinelpos)) {
2246                 emit_sig_cookie (cfg, call, cinfo);
2247         }
2248 }
2249
2250 /*========================= End of Function ========================*/
2251
2252 /*------------------------------------------------------------------*/
2253 /*                                                                  */
2254 /* Name         - mono_arch_emit_outarg_vt                              */
2255 /*                                                                  */
2256 /*------------------------------------------------------------------*/
2257
2258 void
2259 mono_arch_emit_outarg_vt (MonoCompile *cfg, MonoInst *ins, MonoInst *src)
2260 {
2261         MonoCallInst *call = (MonoCallInst*)ins->inst_p0;
2262         ArgInfo *ainfo = (ArgInfo*)ins->inst_p1;
2263         int size = ins->backend.size;
2264
2265         if (ainfo->regtype == RegTypeStructByVal) {
2266                 /*
2267                                 arg->ins.sreg1  = ainfo->reg;
2268                                 arg->ins.opcode = OP_OUTARG_VT;
2269                                 arg->size       = ainfo->size;
2270                                 arg->offset     = ainfo->offset;
2271                                 arg->offPrm     = ainfo->offparm + cinfo->sz.offStruct;
2272                 */
2273                 if (ainfo->reg != STK_BASE) {
2274                         MONO_OUTPUT_VTR2 (cfg, size, ainfo->reg, src->dreg, 0);
2275                 } else {
2276                         MONO_OUTPUT_VTS2 (cfg, size, ainfo->reg, ainfo->offset,
2277                                                           src->dreg, 0);
2278                 }
2279         } else if (ainfo->regtype == RegTypeStructByValInFP) {
2280                 int dreg = mono_alloc_freg (cfg);
2281
2282                 if (ainfo->size == 4) {
2283                         MONO_EMIT_NEW_LOAD_MEMBASE_OP (cfg, OP_LOADR4_MEMBASE, dreg, src->dreg, 0);
2284                         MONO_EMIT_NEW_UNALU (cfg, OP_S390_SETF4RET, dreg, dreg);
2285                 } else {
2286                         g_assert (ainfo->size == 8);
2287
2288                         MONO_EMIT_NEW_LOAD_MEMBASE_OP (cfg, OP_LOADR8_MEMBASE, dreg, src->dreg, 0);
2289                 }
2290
2291                 mono_call_inst_add_outarg_reg (cfg, call, dreg, ainfo->reg, TRUE);
2292         } else {
2293                 MONO_EMIT_NEW_MOVE2 (cfg, STK_BASE, ainfo->offparm,
2294                                                          src->dreg, 0, size);
2295         }
2296 }
2297
2298 /*------------------------------------------------------------------*/
2299 /*                                                                  */
2300 /* Name         - mono_arch_emit_setret                                 */
2301 /*                                                                  */
2302 /*------------------------------------------------------------------*/
2303
2304 void
2305 mono_arch_emit_setret (MonoCompile *cfg, MonoMethod *method, MonoInst *val)
2306 {
2307         MonoType *ret = mono_type_get_underlying_type (mono_method_signature (method)->ret);
2308
2309         if (!ret->byref) {
2310                 if (ret->type == MONO_TYPE_R4) {
2311                         MONO_EMIT_NEW_UNALU (cfg, OP_S390_SETF4RET, s390_f0, val->dreg);
2312                         return;
2313                 } else if (ret->type == MONO_TYPE_R8) {
2314                         MONO_EMIT_NEW_UNALU (cfg, OP_FMOVE, s390_f0, val->dreg);
2315                         return;
2316                 } else if (ret->type == MONO_TYPE_I8 || ret->type == MONO_TYPE_U8) {
2317                         MONO_EMIT_NEW_UNALU (cfg, OP_MOVE, s390_r3, val->dreg + 1);
2318                         MONO_EMIT_NEW_UNALU (cfg, OP_MOVE, s390_r2, val->dreg + 2);
2319                         return;
2320                 }
2321         }
2322
2323         MONO_EMIT_NEW_UNALU (cfg, OP_MOVE, cfg->ret->dreg, val->dreg);
2324 }
2325
2326 /*========================= End of Function ========================*/
2327
2328 /*------------------------------------------------------------------*/
2329 /*                                                                  */
2330 /* Name         - mono_arch_instrument_mem_needs                    */
2331 /*                                                                  */
2332 /* Function     - Allow tracing to work with this interface (with   */
2333 /*                an optional argument).                            */
2334 /*                                                                  */
2335 /*------------------------------------------------------------------*/
2336
2337 void
2338 mono_arch_instrument_mem_needs (MonoMethod *method, int *stack, int *code)
2339 {
2340         /* no stack room needed now (may be needed for FASTCALL-trace support) */
2341         *stack = 0;
2342         /* split prolog-epilog requirements? */
2343         *code = 50; /* max bytes needed: check this number */
2344 }
2345
2346 /*========================= End of Function ========================*/
2347
2348 /*------------------------------------------------------------------*/
2349 /*                                                                  */
2350 /* Name         - mono_arch_instrument_prolog                       */
2351 /*                                                                  */
2352 /* Function     - Create an "instrumented" prolog.                  */
2353 /*                                                                  */
2354 /*------------------------------------------------------------------*/
2355
2356 void*
2357 mono_arch_instrument_prolog (MonoCompile *cfg, void *func, void *p,
2358                              gboolean enable_arguments)
2359 {
2360         guchar  *code = p;
2361         int     parmOffset,
2362                 fpOffset,
2363                 baseReg;
2364
2365         parmOffset = cfg->stack_usage - S390_TRACE_STACK_SIZE;
2366         if (cfg->method->save_lmf)
2367                 parmOffset -= sizeof(MonoLMF);
2368         fpOffset   = parmOffset + (5*sizeof(gint32));
2369         if (fpOffset > 4096) {
2370                 s390_lr (code, s390_r12, STK_BASE);
2371                 baseReg = s390_r12;
2372                 while (fpOffset > 4096) {
2373                         s390_ahi (code, baseReg, 4096);
2374                         fpOffset   -= 4096;
2375                         parmOffset -= 4096;
2376                 }
2377         } else {
2378                 baseReg = STK_BASE;
2379         }
2380
2381         s390_stm  (code, s390_r2, s390_r6, baseReg, parmOffset);
2382         s390_std  (code, s390_f0, 0, baseReg, fpOffset);
2383         s390_std  (code, s390_f1, 0, baseReg, fpOffset+sizeof(gdouble));
2384         s390_std  (code, s390_f2, 0, baseReg, fpOffset+2*sizeof(gdouble));
2385         s390_basr (code, s390_r13, 0);
2386         s390_j    (code, 6);
2387         s390_word (code, cfg->method);
2388         s390_word (code, func);
2389         s390_l    (code, s390_r2, 0, s390_r13, 4);
2390         s390_la   (code, s390_r3, 0, baseReg, parmOffset);
2391         s390_lr   (code, s390_r4, STK_BASE);
2392         s390_ahi  (code, s390_r4, cfg->stack_usage);
2393         s390_l    (code, s390_r1, 0, s390_r13, 8);
2394         s390_basr (code, s390_r14, s390_r1);
2395         s390_ld   (code, s390_f2, 0, baseReg, fpOffset+2*sizeof(gdouble));
2396         s390_ld   (code, s390_f1, 0, baseReg, fpOffset+sizeof(gdouble));
2397         s390_ld   (code, s390_f0, 0, baseReg, fpOffset);
2398         s390_lm   (code, s390_r2, s390_r6, baseReg, parmOffset);
2399
2400         return code;
2401 }
2402
2403 /*========================= End of Function ========================*/
2404
2405 /*------------------------------------------------------------------*/
2406 /*                                                                  */
2407 /* Name         - mono_arch_instrument_epilog                       */
2408 /*                                                                  */
2409 /* Function     - Create an epilog that will handle the returned    */
2410 /*                values used in instrumentation.                   */
2411 /*                                                                  */
2412 /*------------------------------------------------------------------*/
2413
2414 void*
2415 mono_arch_instrument_epilog (MonoCompile *cfg, void *func, void *p, gboolean enable_arguments)
2416 {
2417         guchar     *code = p;
2418         int        save_mode = SAVE_NONE,
2419                    saveOffset;
2420         MonoMethod *method = cfg->method;
2421         int        rtype = mono_type_get_underlying_type (mono_method_signature (method)->ret)->type;
2422
2423         saveOffset = cfg->stack_usage - S390_TRACE_STACK_SIZE;
2424         if (method->save_lmf)
2425                 saveOffset -= sizeof(MonoLMF);
2426
2427 handle_enum:
2428         switch (rtype) {
2429         case MONO_TYPE_VOID:
2430                 /* special case string .ctor icall */
2431                 if (strcmp (".ctor", method->name) && method->klass == mono_defaults.string_class)
2432                         save_mode = SAVE_ONE;
2433                 else
2434                         save_mode = SAVE_NONE;
2435                 break;
2436         case MONO_TYPE_I8:
2437         case MONO_TYPE_U8:
2438                 save_mode = SAVE_TWO;
2439                 break;
2440         case MONO_TYPE_R4:
2441                 save_mode = SAVE_R4;
2442                 break;
2443         case MONO_TYPE_R8:
2444                 save_mode = SAVE_R8;
2445                 break;
2446         case MONO_TYPE_VALUETYPE:
2447                 if (mono_method_signature (method)->ret->data.klass->enumtype) {
2448                         rtype = mono_method_signature (method)->ret->data.klass->enum_basetype->type;
2449                         goto handle_enum;
2450                 }
2451                 save_mode = SAVE_STRUCT;
2452                 break;
2453         default:
2454                 save_mode = SAVE_ONE;
2455                 break;
2456         }
2457
2458         switch (save_mode) {
2459         case SAVE_TWO:
2460                 s390_stm (code, s390_r2, s390_r3, cfg->frame_reg, saveOffset);
2461                 if (enable_arguments) {
2462                         s390_lr (code, s390_r4, s390_r3);
2463                         s390_lr (code, s390_r3, s390_r2);
2464                 }
2465                 break;
2466         case SAVE_ONE:
2467                 s390_st (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2468                 if (enable_arguments) {
2469                         s390_lr (code, s390_r3, s390_r2);
2470                 }
2471                 break;
2472         case SAVE_R4:
2473                 s390_std (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2474                 if (enable_arguments) {
2475                         s390_ldebr (code, s390_f0, s390_f0);
2476                 }
2477                 break;
2478         case SAVE_R8:
2479                 s390_std (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2480                 break;
2481         case SAVE_STRUCT:
2482                 s390_st (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2483                 if (enable_arguments) {
2484                         s390_l (code, s390_r3, 0, cfg->frame_reg,
2485                                 S390_MINIMAL_STACK_SIZE+cfg->param_area);
2486                 }
2487                 break;
2488         case SAVE_NONE:
2489         default:
2490                 break;
2491         }
2492
2493         s390_basr (code, s390_r13, 0);
2494         s390_j    (code, 6);
2495         s390_word (code, cfg->method);
2496         s390_word (code, func);
2497         s390_l    (code, s390_r2, 0, s390_r13, 4);
2498         s390_l    (code, s390_r1, 0, s390_r13, 8);
2499         s390_basr (code, s390_r14, s390_r1);
2500
2501         switch (save_mode) {
2502         case SAVE_TWO:
2503                 s390_lm  (code, s390_r2, s390_r3, cfg->frame_reg, saveOffset);
2504                 break;
2505         case SAVE_ONE:
2506                 s390_l   (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2507                 break;
2508         case SAVE_R4:
2509         case SAVE_R8:
2510                 s390_ld  (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2511                 break;
2512         case SAVE_STRUCT:
2513                 s390_l   (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2514                 break;
2515         case SAVE_NONE:
2516         default:
2517                 break;
2518         }
2519
2520         return code;
2521 }
2522
2523 /*========================= End of Function ========================*/
2524
2525 void
2526 mono_arch_peephole_pass_1 (MonoCompile *cfg, MonoBasicBlock *bb)
2527 {
2528 }
2529
2530 /*------------------------------------------------------------------*/
2531 /*                                                                  */
2532 /* Name         - mono_arch_peephole_pass                                     */
2533 /*                                                                  */
2534 /* Function     - Form a peephole pass at the code looking for      */
2535 /*                simple optimizations.                             */
2536 /*                                                                  */
2537 /*------------------------------------------------------------------*/
2538
2539 void
2540 mono_arch_peephole_pass_2 (MonoCompile *cfg, MonoBasicBlock *bb)
2541 {
2542         MonoInst *ins, *n;
2543
2544         MONO_BB_FOR_EACH_INS_SAFE (bb, n, ins) {
2545                 mono_peephole_ins (bb, ins);
2546         }
2547 }
2548
2549 /*========================= End of Function ========================*/
2550
2551 void
2552 mono_arch_lowering_pass (MonoCompile *cfg, MonoBasicBlock *bb)
2553 {
2554         MonoInst *ins, *next;
2555
2556         if (bb->max_vreg > cfg->rs->next_vreg)
2557                 cfg->rs->next_vreg = bb->max_vreg;
2558
2559         MONO_BB_FOR_EACH_INS_SAFE (bb, next, ins) {
2560                 switch (ins->opcode) {
2561                 case OP_DIV_IMM:
2562                 case OP_REM_IMM:
2563                 case OP_IDIV_IMM:
2564                 case OP_IREM_IMM:
2565                 case OP_IDIV_UN_IMM:
2566                 case OP_IREM_UN_IMM:
2567                 case OP_LOCALLOC_IMM:
2568                         mono_decompose_op_imm (cfg, bb, ins);
2569                         break;
2570                 default:
2571                         break;
2572                 }
2573         }
2574 }
2575
2576 /*========================= End of Function ========================*/
2577
2578 /*------------------------------------------------------------------*/
2579 /*                                                                  */
2580 /* Name         - emit_float_to_int                                 */
2581 /*                                                                  */
2582 /* Function     - Create instructions which will convert a floating */
2583 /*                point value to integer.                           */
2584 /*                                                                  */
2585 /*------------------------------------------------------------------*/
2586
2587 static guchar*
2588 emit_float_to_int (MonoCompile *cfg, guchar *code, int dreg, int sreg, int size, gboolean is_signed)
2589 {
2590         /* sreg is a float, dreg is an integer reg. */
2591         if (is_signed) {
2592                 s390_cfdbr (code, dreg, 5, sreg);
2593                 switch (size) {
2594                         case 1:
2595                                 s390_lhi  (code, s390_r0, 0);
2596                                 s390_lhi  (code, s390_r13, 0xff);
2597                                 s390_ltr  (code, dreg, dreg);
2598                                 s390_jnl  (code, 4);
2599                                 s390_lhi  (code, s390_r0, 0x80);
2600                                 s390_nr   (code, dreg, s390_r13);
2601                                 s390_or   (code, dreg, s390_r0);
2602                                 break;
2603                 }
2604         } else {
2605                 short *o[1];
2606                 s390_basr   (code, s390_r13, 0);
2607                 s390_j      (code, 10);
2608                 s390_llong  (code, 0x41e0000000000000LL);
2609                 s390_llong  (code, 0x41f0000000000000LL);
2610                 s390_ldr    (code, s390_f15, sreg);
2611                 s390_cdb    (code, s390_f15, 0, s390_r13, 4);
2612                 s390_jl     (code, 0); CODEPTR(code, o[0]);
2613                 s390_sdb    (code, s390_f15, 0, s390_r13, 12);
2614                 s390_cfdbr  (code, dreg, 7, s390_f15);
2615                 s390_j      (code, 4);
2616                 PTRSLOT(code, o[0]);
2617                 s390_cfdbr  (code, dreg, 5, sreg);
2618                 switch (size) {
2619                         case 1:
2620                                 s390_lhi  (code, s390_r0, 0xff);
2621                                 s390_nr   (code, dreg, s390_r0);
2622                                 break;
2623                         case 2:
2624                                 s390_lhi  (code, s390_r0, -1);
2625                                 s390_srl  (code, s390_r0, 0, 16);
2626                                 s390_nr   (code, dreg, s390_r0);
2627                                 break;
2628                 }
2629         }
2630         return code;
2631 }
2632
2633 /*========================= End of Function ========================*/
2634
2635 /*------------------------------------------------------------------*/
2636 /*                                                                  */
2637 /* Name         - mono_arch_output_basic_block                      */
2638 /*                                                                  */
2639 /* Function     - Perform the "real" work of emitting instructions  */
2640 /*                that will do the work of in the basic block.      */
2641 /*                                                                  */
2642 /*------------------------------------------------------------------*/
2643
2644 void
2645 mono_arch_output_basic_block (MonoCompile *cfg, MonoBasicBlock *bb)
2646 {
2647         MonoInst *ins;
2648         MonoCallInst *call;
2649         guint offset;
2650         guint8 *code = cfg->native_code + cfg->code_len;
2651         MonoInst *last_ins = NULL;
2652         guint last_offset = 0;
2653         int max_len, cpos, src2;
2654
2655         /* we don't align basic blocks of loops on s390 */
2656
2657         if (cfg->verbose_level > 2)
2658                 g_print ("Basic block %d starting at offset 0x%x\n", bb->block_num, bb->native_offset);
2659
2660         cpos = bb->max_offset;
2661
2662         if (cfg->prof_options & MONO_PROFILE_COVERAGE) {
2663                 //MonoCoverageInfo *cov = mono_get_coverage_info (cfg->method);
2664                 //g_assert (!mono_compile_aot);
2665                 //cpos += 6;
2666                 //if (bb->cil_code)
2667                 //      cov->data [bb->dfn].iloffset = bb->cil_code - cfg->cil_code;
2668                 /* this is not thread save, but good enough */
2669                 /* fixme: howto handle overflows? */
2670                 //x86_inc_mem (code, &cov->data [bb->dfn].count);
2671         }
2672
2673         MONO_BB_FOR_EACH_INS (bb, ins) {
2674                 offset = code - cfg->native_code;
2675
2676                 max_len = ((guint8 *)ins_get_spec (ins->opcode))[MONO_INST_LEN];
2677
2678                 if (offset > (cfg->code_size - max_len - 16)) {
2679                         cfg->code_size *= 2;
2680                         cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
2681                         code = cfg->native_code + offset;
2682                 }
2683
2684                 mono_debug_record_line_number (cfg, ins, offset);
2685
2686                 switch (ins->opcode) {
2687                 case OP_STOREI1_MEMBASE_IMM: {
2688                         s390_lhi (code, s390_r0, ins->inst_imm);
2689                         if (s390_is_uimm12(ins->inst_offset))
2690                                 s390_stc (code, s390_r0, 0, ins->inst_destbasereg, ins->inst_offset);
2691                         else {
2692                                 s390_basr (code, s390_r13, 0);
2693                                 s390_j    (code, 4);
2694                                 s390_word (code, ins->inst_offset);
2695                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2696                                 s390_stc  (code, s390_r0, s390_r13, ins->inst_destbasereg, 0);
2697                         }
2698                 }
2699                         break;
2700                 case OP_STOREI2_MEMBASE_IMM: {
2701                         s390_lhi (code, s390_r0, ins->inst_imm);
2702                         if (s390_is_uimm12(ins->inst_offset)) {
2703                                 s390_sth (code, s390_r0, 0, ins->inst_destbasereg, ins->inst_offset);
2704                         } else {
2705                                 s390_basr (code, s390_r13, 0);
2706                                 s390_j    (code, 4);
2707                                 s390_word (code, ins->inst_offset);
2708                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2709                                 s390_sth  (code, s390_r0, s390_r13, ins->inst_destbasereg, 0);
2710                         }
2711                 }
2712                         break;
2713                 case OP_STORE_MEMBASE_IMM:
2714                 case OP_STOREI4_MEMBASE_IMM: {
2715                         if (s390_is_imm16(ins->inst_imm)) {
2716                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2717                         } else {
2718                                 s390_basr (code, s390_r13, 0);
2719                                 s390_j    (code, 4);
2720                                 s390_word (code, ins->inst_imm);
2721                                 s390_l    (code, s390_r0, 0, s390_r13, 4);
2722                         }
2723                         if (s390_is_uimm12(ins->inst_offset)) {
2724                                 s390_st  (code, s390_r0, 0, ins->inst_destbasereg, ins->inst_offset);
2725                         } else {
2726                                 s390_basr (code, s390_r13, 0);
2727                                 s390_j    (code, 4);
2728                                 s390_word (code, ins->inst_offset);
2729                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2730                                 s390_st   (code, s390_r0, s390_r13, ins->inst_destbasereg, 0);
2731                         }
2732                 }
2733                         break;
2734                 case OP_STOREI1_MEMBASE_REG: {
2735                         if (s390_is_uimm12(ins->inst_offset)) {
2736                                 s390_stc  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
2737                         } else {
2738                                 s390_basr (code, s390_r13, 0);
2739                                 s390_j    (code, 4);
2740                                 s390_word (code, ins->inst_offset);
2741                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2742                                 s390_stc  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
2743                         }
2744                 }
2745                         break;
2746                 case OP_STOREI2_MEMBASE_REG: {
2747                         if (s390_is_uimm12(ins->inst_offset)) {
2748                                 s390_sth  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
2749                         } else {
2750                                 s390_basr (code, s390_r13, 0);
2751                                 s390_j    (code, 4);
2752                                 s390_word (code, ins->inst_offset);
2753                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2754                                 s390_sth  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
2755                         }
2756                 }
2757                         break;
2758                 case OP_STORE_MEMBASE_REG:
2759                 case OP_STOREI4_MEMBASE_REG: {
2760                         if (s390_is_uimm12(ins->inst_offset)) {
2761                                 s390_st   (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
2762                         } else {
2763                                 s390_basr (code, s390_r13, 0);
2764                                 s390_j    (code, 4);
2765                                 s390_word (code, ins->inst_offset);
2766                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2767                                 s390_st   (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
2768                         }
2769                 }
2770                         break;
2771                 case OP_LOADU4_MEM:
2772                         g_assert_not_reached ();
2773                         break;
2774                 case OP_LOAD_MEMBASE:
2775                 case OP_LOADI4_MEMBASE:
2776                 case OP_LOADU4_MEMBASE: {
2777                         if (s390_is_uimm12(ins->inst_offset))
2778                                 s390_l    (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
2779                         else {
2780                                 if (s390_is_imm16(ins->inst_offset)) {
2781                                         s390_lhi (code, s390_r13, ins->inst_offset);
2782                                         s390_l   (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
2783                                 } else {
2784                                         s390_basr (code, s390_r13, 0);
2785                                         s390_j    (code, 4);
2786                                         s390_word (code, ins->inst_offset);
2787                                         s390_l    (code, s390_r13, 0, s390_r13, 4);
2788                                         s390_l    (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
2789                                 }
2790                         }
2791                 }
2792                         break;
2793                 case OP_LOADU1_MEMBASE: {
2794                         s390_lhi (code, s390_r0, 0);
2795                         if (s390_is_uimm12(ins->inst_offset))
2796                                 s390_ic   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
2797                         else {
2798                                 s390_basr (code, s390_r13, 0);
2799                                 s390_j    (code, 4);
2800                                 s390_word (code, ins->inst_offset);
2801                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2802                                 s390_ic   (code, s390_r0, s390_r13, ins->inst_basereg, 0);
2803                         }
2804                         s390_lr   (code, ins->dreg, s390_r0);
2805                 }
2806                         break;
2807                 case OP_LOADI1_MEMBASE: {
2808                         s390_lhi (code, s390_r0, 0);
2809                         if (s390_is_uimm12(ins->inst_offset))
2810                                 s390_ic   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
2811                         else {
2812                                 s390_basr (code, s390_r13, 0);
2813                                 s390_j    (code, 4);
2814                                 s390_word (code, ins->inst_offset);
2815                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2816                                 s390_ic   (code, s390_r0, s390_r13, ins->inst_basereg, 0);
2817                         }
2818                         s390_lhi  (code, s390_r13, 0x80);
2819                         s390_nr   (code, s390_r13, s390_r0);
2820                         s390_jz   (code, 5);
2821                         s390_lhi  (code, s390_r13, 0xff00);
2822                         s390_or   (code, s390_r0, s390_r13);
2823                         s390_lr   (code, ins->dreg, s390_r0);
2824                 }
2825                         break;
2826                 case OP_LOADU2_MEMBASE: {
2827                         s390_lhi (code, s390_r0, 0);
2828                         if (s390_is_uimm12(ins->inst_offset))
2829                                 s390_icm  (code, s390_r0, 3, ins->inst_basereg, ins->inst_offset);
2830                         else {
2831                                 s390_basr (code, s390_r13, 0);
2832                                 s390_j    (code, 4);
2833                                 s390_word (code, ins->inst_offset);
2834                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2835                                 s390_ar   (code, s390_r13, ins->inst_basereg);
2836                                 s390_icm  (code, s390_r0, 3, s390_r13, 0);
2837                         }
2838                         s390_lr  (code, ins->dreg, s390_r0);
2839                 }
2840                         break;
2841                 case OP_LOADI2_MEMBASE: {
2842                         s390_lhi (code, s390_r0, 0);
2843                         if (s390_is_uimm12(ins->inst_offset))
2844                                 s390_lh   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
2845                         else {
2846                                 s390_basr (code, s390_r13, 0);
2847                                 s390_j    (code, 4);
2848                                 s390_word (code, ins->inst_offset);
2849                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2850                                 s390_lh   (code, s390_r0, s390_r13, ins->inst_basereg, 0);
2851                         }
2852                         s390_lr  (code, ins->dreg, s390_r0);
2853                 }
2854                         break;
2855
2856                 case OP_ICONV_TO_I1: {
2857                         if (ins->dreg != ins->sreg1)
2858                                 s390_lr   (code, ins->dreg, ins->sreg1);
2859                         s390_sll (code, ins->dreg, 0, 24);
2860                         s390_sra (code, ins->dreg, 0, 24);
2861                 }
2862                         break;
2863                 case OP_ICONV_TO_I2: {
2864                         if (ins->dreg != ins->sreg1)
2865                                 s390_lr   (code, ins->dreg, ins->sreg1);
2866                         s390_sll (code, ins->dreg, 0, 16);
2867                         s390_sra (code, ins->dreg, 0, 16);
2868                 }
2869                         break;
2870                 case OP_ICONV_TO_U1: {
2871                         s390_lhi  (code, s390_r0, 0xff);
2872                         if (ins->dreg != ins->sreg1) {
2873                                 s390_lr   (code, ins->dreg, ins->sreg1);
2874                         }
2875                         s390_nr   (code, ins->dreg, s390_r0);
2876                 }
2877                         break;
2878                 case OP_ICONV_TO_U2: {
2879                         s390_lhi  (code, s390_r0, -1);
2880                         s390_sll  (code, s390_r0, 0, 16);
2881                         s390_srl  (code, s390_r0, 0, 16);
2882                         if (ins->dreg != ins->sreg1) {
2883                                 s390_lr   (code, ins->dreg, ins->sreg1);
2884                         }
2885                         s390_nr   (code, ins->dreg, s390_r0);
2886                 }
2887                         break;
2888                 case OP_COMPARE:
2889                 case OP_ICOMPARE: {
2890                         gboolean un = FALSE;
2891                         MonoInst *next = ins->next;
2892
2893                         if ((next) &&
2894                             (((next->opcode >= OP_IBNE_UN) &&
2895                               (next->opcode <= OP_IBLT_UN)) ||
2896                              ((next->opcode >= OP_COND_EXC_NE_UN) &&
2897                               (next->opcode <= OP_COND_EXC_LT_UN)) ||
2898                              ((next->opcode >= OP_COND_EXC_INE_UN) &&
2899                               (next->opcode <= OP_COND_EXC_ILT_UN)) ||
2900                              ((next->opcode == OP_CLT_UN) ||
2901                               (next->opcode == OP_CGT_UN)) ||
2902                              ((next->opcode == OP_ICLT_UN) ||
2903                               (next->opcode == OP_ICGT_UN))))
2904                                 un = TRUE;
2905
2906                         if (un)
2907                                 s390_clr  (code, ins->sreg1, ins->sreg2);
2908                         else
2909                                 s390_cr   (code, ins->sreg1, ins->sreg2);
2910                 }
2911                         break;
2912                 case OP_COMPARE_IMM:
2913                 case OP_ICOMPARE_IMM: {
2914                         gboolean un = FALSE;
2915                         MonoInst *next = ins->next;
2916
2917                         if ((next) &&
2918                             (((next->opcode >= OP_IBNE_UN) &&
2919                               (next->opcode <= OP_IBLT_UN)) ||
2920                              ((next->opcode >= OP_COND_EXC_NE_UN) &&
2921                               (next->opcode <= OP_COND_EXC_LT_UN)) ||
2922                              ((next->opcode >= OP_COND_EXC_INE_UN) &&
2923                               (next->opcode <= OP_COND_EXC_ILT_UN)) ||
2924                              ((next->opcode == OP_CLT_UN) ||
2925                               (next->opcode == OP_CGT_UN)) ||
2926                              ((next->opcode == OP_ICLT_UN) ||
2927                               (next->opcode == OP_ICGT_UN))))
2928                                 un = TRUE;
2929
2930                         if (s390_is_imm16 (ins->inst_imm)) {
2931                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2932                                 if (un)
2933                                         s390_clr  (code, ins->sreg1, s390_r0);
2934                                 else
2935                                         s390_cr   (code, ins->sreg1, s390_r0);
2936                         }
2937                         else {
2938                                 s390_basr (code, s390_r13, 0);
2939                                 s390_j    (code, 4);
2940                                 s390_word (code, ins->inst_imm);
2941                                 if (un)
2942                                         s390_cl   (code, ins->sreg1, 0, s390_r13, 4);
2943                                 else
2944                                         s390_c    (code, ins->sreg1, 0, s390_r13, 4);
2945                         }
2946                 }
2947                         break;
2948                 case OP_BREAK: {
2949                         mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS, mono_break);
2950                         s390_brasl (code, s390_r14, 0);
2951                 }
2952                         break;
2953                 case OP_ADDCC:
2954                 case OP_IADDCC: {
2955                         CHECK_SRCDST_COM;
2956                         s390_alr  (code, ins->dreg, src2);
2957                 }
2958                         break;
2959                 case OP_IADD: {
2960                         CHECK_SRCDST_COM;
2961                         s390_ar   (code, ins->dreg, src2);
2962                 }
2963                         break;
2964                 case OP_ADC:
2965                 case OP_IADC: {
2966                         CHECK_SRCDST_COM;
2967                         s390_alcr (code, ins->dreg, src2);
2968                 }
2969                         break;
2970                 case OP_ADD_IMM:
2971                 case OP_IADD_IMM: {
2972                         if (ins->dreg != ins->sreg1) {
2973                                 s390_lr   (code, ins->dreg, ins->sreg1);
2974                         }
2975                         if ((ins->next) &&
2976                             (ins->next->opcode == OP_ADC_IMM)) {
2977                                 s390_basr (code, s390_r13, 0);
2978                                 s390_j    (code, 4);
2979                                 s390_word (code, ins->inst_imm);
2980                                 s390_a (code, ins->dreg, 0, s390_r13, 4);
2981                         } else {
2982                                 if (s390_is_imm16 (ins->inst_imm)) {
2983                                         s390_ahi  (code, ins->dreg, ins->inst_imm);
2984                                 } else {
2985                                         s390_basr (code, s390_r13, 0);
2986                                         s390_j    (code, 4);
2987                                         s390_word (code, ins->inst_imm);
2988                                         s390_a (code, ins->dreg, 0, s390_r13, 4);
2989                                 }
2990                         }
2991                 }
2992                         break;
2993                 case OP_ADDCC_IMM: {
2994                         if ((ins->next) &&
2995                             (ins->next->opcode == OP_ADC_IMM)) {
2996                                 s390_basr (code, s390_r13, 0);
2997                                 s390_j    (code, 4);
2998                                 s390_word (code, ins->inst_imm);
2999                                 if (ins->dreg != ins->sreg1) {
3000                                         s390_lr   (code, ins->dreg, ins->sreg1);
3001                                 }
3002                                 s390_al   (code, ins->dreg, 0, s390_r13, 4);
3003                         } else {
3004                                 if (s390_is_imm16 (ins->inst_imm)) {
3005                                         if (ins->dreg != ins->sreg1) {
3006                                                 s390_lr   (code, ins->dreg, ins->sreg1);
3007                                         }
3008                                         s390_lhi  (code, s390_r0, ins->inst_imm);
3009                                         s390_alcr (code, ins->dreg, s390_r0);
3010                                 } else {
3011                                         s390_basr (code, s390_r13, 0);
3012                                         s390_j    (code, 4);
3013                                         s390_word (code, ins->inst_imm);
3014                                         if (ins->dreg != ins->sreg1) {
3015                                                 s390_lr   (code, ins->dreg, ins->sreg1);
3016                                         }
3017                                         s390_al   (code, ins->dreg, 0, s390_r13, 4);
3018                                 }
3019                         }
3020                 }
3021                         break;
3022                 case OP_ADC_IMM: {
3023                         if (s390_is_imm16 (ins->inst_imm)) {
3024                                 if (ins->dreg != ins->sreg1) {
3025                                         s390_lr   (code, ins->dreg, ins->sreg1);
3026                                 }
3027                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3028                                 s390_alcr (code, ins->dreg, s390_r0);
3029                         } else {
3030                                 s390_basr (code, s390_r13, 0);
3031                                 s390_j    (code, 4);
3032                                 s390_word (code, ins->inst_imm);
3033                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3034                                 s390_alcr (code, ins->dreg, s390_r13);
3035                         }
3036                 }
3037                         break;
3038                 case OP_IADD_OVF:
3039                 case OP_S390_IADD_OVF: {
3040                         CHECK_SRCDST_COM;
3041                         s390_ar   (code, ins->dreg, src2);
3042                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3043                 }
3044                         break;
3045                 case OP_IADD_OVF_UN:
3046                 case OP_S390_IADD_OVF_UN: {
3047                         CHECK_SRCDST_COM;
3048                         s390_alr  (code, ins->dreg, src2);
3049                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
3050                 }
3051                         break;
3052                 case OP_LADD:
3053                 case OP_S390_LADD: {
3054                         s390_alr  (code, s390_r0, ins->sreg1);
3055                         s390_jnc  (code, 4);
3056                         s390_ahi  (code, s390_r1, 1);
3057                         s390_ar   (code, s390_r1, ins->sreg2);
3058                         s390_lr   (code, ins->dreg, s390_r0);
3059                         s390_lr   (code, ins->dreg+1, s390_r1);
3060                 }
3061                         break;
3062                 case OP_LADD_OVF:
3063                 case OP_S390_LADD_OVF: {
3064                         short int *o[1];
3065                         s390_alr  (code, s390_r0, ins->sreg1);
3066                         s390_jnc  (code, 0); CODEPTR(code, o[0]);
3067                         s390_ahi  (code, s390_r1, 1);
3068                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3069                         PTRSLOT   (code, o[0]);
3070                         s390_ar   (code, s390_r1, ins->sreg2);
3071                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3072                         s390_lr   (code, ins->dreg, s390_r0);
3073                         s390_lr   (code, ins->dreg+1, s390_r1);
3074                 }
3075                         break;
3076                 case OP_LADD_OVF_UN:
3077                 case OP_S390_LADD_OVF_UN: {
3078                         s390_alr  (code, s390_r0, ins->sreg1);
3079                         s390_alcr (code, s390_r1, ins->sreg2);
3080                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
3081                         s390_lr   (code, ins->dreg, s390_r0);
3082                         s390_lr   (code, ins->dreg+1, s390_r1);
3083                 }
3084                         break;
3085                 case OP_ADD_OVF_CARRY: {
3086                         CHECK_SRCDST_COM;
3087                         s390_lhi  (code, s390_r0, 0);
3088                         s390_lr   (code, s390_r1, s390_r0);
3089                         s390_alcr (code, s390_r0, s390_r1);
3090                         s390_ar   (code, ins->dreg, src2);
3091                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3092                         s390_ar   (code, ins->dreg, s390_r0);
3093                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3094                 }
3095                         break;
3096                 case OP_ADD_OVF_UN_CARRY: {
3097                         CHECK_SRCDST_COM;
3098                         s390_alcr (code, ins->dreg, src2);
3099                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
3100                 }
3101                         break;
3102                 case OP_SUBCC:
3103                 case OP_ISUBCC: {
3104                         CHECK_SRCDST_NCOM;
3105                         s390_slr (code, ins->dreg, src2);
3106                 }
3107                         break;
3108                 case OP_ISUB: {
3109                         CHECK_SRCDST_NCOM;
3110                         s390_sr   (code, ins->dreg, src2);
3111                 }
3112                         break;
3113                 case OP_SBB:
3114                 case OP_ISBB: {
3115                         CHECK_SRCDST_NCOM;
3116                         s390_slbr (code, ins->dreg, src2);
3117                 }
3118                         break;
3119                 case OP_SUBCC_IMM: {
3120                         if (s390_is_imm16 (-ins->inst_imm)) {
3121                                 if (ins->dreg != ins->sreg1) {
3122                                         s390_lr   (code, ins->dreg, ins->sreg1);
3123                                 }
3124                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3125                                 s390_slr  (code, ins->dreg, s390_r0);
3126                         } else {
3127                                 s390_basr (code, s390_r13, 0);
3128                                 s390_j    (code, 4);
3129                                 s390_word (code, ins->inst_imm);
3130                                 if (ins->dreg != ins->sreg1) {
3131                                         s390_lr   (code, ins->dreg, ins->sreg1);
3132                                 }
3133                                 s390_sl   (code, ins->dreg, 0, s390_r13, 4);
3134                         }
3135                 }
3136                         break;
3137                 case OP_SUB_IMM:
3138                 case OP_ISUB_IMM: {
3139                         if (s390_is_imm16 (-ins->inst_imm)) {
3140                                 if (ins->dreg != ins->sreg1) {
3141                                         s390_lr   (code, ins->dreg, ins->sreg1);
3142                                 }
3143                                 s390_ahi  (code, ins->dreg, -ins->inst_imm);
3144                         } else {
3145                                 s390_basr (code, s390_r13, 0);
3146                                 s390_j    (code, 4);
3147                                 s390_word (code, ins->inst_imm);
3148                                 if (ins->dreg != ins->sreg1) {
3149                                         s390_lr   (code, ins->dreg, ins->sreg1);
3150                                 }
3151                                 s390_s    (code, ins->dreg, 0, s390_r13, 4);
3152                         }
3153                 }
3154                         break;
3155                 case OP_SBB_IMM: {
3156                         if (ins->dreg != ins->sreg1) {
3157                                 s390_lr    (code, ins->dreg, ins->sreg1);
3158                         }
3159                         if (s390_is_imm16 (-ins->inst_imm)) {
3160                                 s390_lhi   (code, s390_r0, ins->inst_imm);
3161                                 s390_slbr  (code, ins->dreg, s390_r0);
3162                         } else {
3163                                 s390_basr (code, s390_r13, 0);
3164                                 s390_j    (code, 4);
3165                                 s390_word (code, ins->inst_imm);
3166                                 s390_slb  (code, ins->dreg, 0, s390_r13, 4);
3167                         }
3168                 }
3169                         break;
3170                 case OP_ISUB_OVF:
3171                 case OP_S390_ISUB_OVF: {
3172                         CHECK_SRCDST_NCOM;
3173                         s390_sr   (code, ins->dreg, src2);
3174                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3175                 }
3176                         break;
3177                 case OP_ISUB_OVF_UN:
3178                 case OP_S390_ISUB_OVF_UN: {
3179                         CHECK_SRCDST_NCOM;
3180                         s390_slr  (code, ins->dreg, src2);
3181                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
3182                 }
3183                         break;
3184                 case OP_LSUB:
3185                 case OP_S390_LSUB: {
3186                         s390_lr   (code, s390_r14, ins->sreg2);
3187                         s390_slr  (code, s390_r0, ins->sreg1);
3188                         s390_jnl  (code, 4);
3189                         s390_ahi  (code, s390_r14, 1);
3190                         s390_sr   (code, s390_r1, s390_r14);
3191                         s390_lr   (code, ins->dreg, s390_r0);
3192                         s390_lr   (code, ins->dreg+1, s390_r1);
3193                 }
3194                         break;
3195                 case OP_LSUB_OVF:
3196                 case OP_S390_LSUB_OVF: {
3197                         short int *o[1];
3198                         s390_lr   (code, s390_r14, ins->sreg2);
3199                         s390_slr  (code, s390_r0, ins->sreg1);
3200                         s390_jnl  (code, 0); CODEPTR(code, o[0]);
3201                         s390_ahi  (code, s390_r14, 1);
3202                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3203                         PTRSLOT   (code, o[0]);
3204                         s390_sr   (code, s390_r1, s390_r14);
3205                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3206                         s390_lr   (code, ins->dreg, s390_r0);
3207                         s390_lr   (code, ins->dreg+1, s390_r1);
3208                 }
3209                         break;
3210                 case OP_LSUB_OVF_UN:
3211                 case OP_S390_LSUB_OVF_UN: {
3212                         s390_slr  (code, s390_r0, ins->sreg1);
3213                         s390_slbr (code, s390_r1, ins->sreg2);
3214                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, "OverflowException");
3215                         s390_lr   (code, ins->dreg, s390_r0);
3216                         s390_lr   (code, ins->dreg+1, s390_r1);
3217                 }
3218                         break;
3219                 case OP_SUB_OVF_CARRY: {
3220                         CHECK_SRCDST_NCOM;
3221                         s390_lhi  (code, s390_r0, 0);
3222                         s390_lr   (code, s390_r1, s390_r0);
3223                         s390_slbr (code, s390_r0, s390_r1);
3224                         s390_sr   (code, ins->dreg, src2);
3225                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3226                         s390_ar   (code, ins->dreg, s390_r0);
3227                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3228                 }
3229                         break;
3230                 case OP_SUB_OVF_UN_CARRY: {
3231                         CHECK_SRCDST_NCOM;
3232                         s390_slbr (code, ins->dreg, src2);
3233                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
3234                 }
3235                         break;
3236                 case OP_IAND: {
3237                         if (ins->sreg1 == ins->dreg) {
3238                                 s390_nr   (code, ins->dreg, ins->sreg2);
3239                         }
3240                         else {
3241                                 if (ins->sreg2 == ins->dreg) {
3242                                         s390_nr  (code, ins->dreg, ins->sreg1);
3243                                 }
3244                                 else {
3245                                         s390_lr  (code, ins->dreg, ins->sreg1);
3246                                         s390_nr  (code, ins->dreg, ins->sreg2);
3247                                 }
3248                         }
3249                 }
3250                         break;
3251                 case OP_AND_IMM:
3252                 case OP_IAND_IMM: {
3253                         if (s390_is_imm16 (ins->inst_imm)) {
3254                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3255                                 if (ins->dreg != ins->sreg1) {
3256                                         s390_lr   (code, ins->dreg, ins->sreg1);
3257                                 }
3258                                 s390_nr   (code, ins->dreg, s390_r0);
3259                         } else {
3260                                 s390_basr (code, s390_r13, 0);
3261                                 s390_j    (code, 4);
3262                                 s390_word (code, ins->inst_imm);
3263                                 if (ins->dreg != ins->sreg1) {
3264                                         s390_lr   (code, ins->dreg, ins->sreg1);
3265                                 }
3266                                 s390_n    (code, ins->dreg, 0, s390_r13, 4);
3267                         }
3268                 }
3269                         break;
3270                 case OP_IDIV: {
3271                         s390_lr   (code, s390_r0, ins->sreg1);
3272                         s390_srda (code, s390_r0, 0, 32);
3273                         s390_dr   (code, s390_r0, ins->sreg2);
3274                         s390_lr   (code, ins->dreg, s390_r1);
3275                 }
3276                         break;
3277                 case OP_IDIV_UN: {
3278                         s390_lr   (code, s390_r0, ins->sreg1);
3279                         s390_srdl (code, s390_r0, 0, 32);
3280                         s390_dlr  (code, s390_r0, ins->sreg2);
3281                         s390_lr   (code, ins->dreg, s390_r1);
3282                 }
3283                         break;
3284                 case OP_IREM: {
3285                         s390_lr   (code, s390_r0, ins->sreg1);
3286                         s390_srda (code, s390_r0, 0, 32);
3287                         s390_dr   (code, s390_r0, ins->sreg2);
3288                         s390_lr   (code, ins->dreg, s390_r0);
3289                         break;
3290                 case OP_IREM_UN:
3291                         s390_lr   (code, s390_r0, ins->sreg1);
3292                         s390_srdl (code, s390_r0, 0, 32);
3293                         s390_dlr  (code, s390_r0, ins->sreg2);
3294                         s390_lr   (code, ins->dreg, s390_r0);
3295                 }
3296                         break;
3297                 case OP_IOR: {
3298                         if (ins->sreg1 == ins->dreg) {
3299                                 s390_or   (code, ins->dreg, ins->sreg2);
3300                         }
3301                         else {
3302                                 if (ins->sreg2 == ins->dreg) {
3303                                         s390_or  (code, ins->dreg, ins->sreg1);
3304                                 }
3305                                 else {
3306                                         s390_lr  (code, ins->dreg, ins->sreg1);
3307                                         s390_or  (code, ins->dreg, ins->sreg2);
3308                                 }
3309                         }
3310                 }
3311                         break;
3312                 case OP_OR_IMM:
3313                 case OP_IOR_IMM: {
3314                         if (s390_is_imm16 (ins->inst_imm)) {
3315                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3316                                 if (ins->dreg != ins->sreg1) {
3317                                         s390_lr   (code, ins->dreg, ins->sreg1);
3318                                 }
3319                                 s390_or   (code, ins->dreg, s390_r0);
3320                         } else {
3321                                 s390_basr (code, s390_r13, 0);
3322                                 s390_j    (code, 4);
3323                                 s390_word (code, ins->inst_imm);
3324                                 if (ins->dreg != ins->sreg1) {
3325                                         s390_lr   (code, ins->dreg, ins->sreg1);
3326                                 }
3327                                 s390_o    (code, ins->dreg, 0, s390_r13, 4);
3328                         }
3329                 }
3330                         break;
3331                 case OP_IXOR: {
3332                         if (ins->sreg1 == ins->dreg) {
3333                                 s390_xr   (code, ins->dreg, ins->sreg2);
3334                         }
3335                         else {
3336                                 if (ins->sreg2 == ins->dreg) {
3337                                         s390_xr  (code, ins->dreg, ins->sreg1);
3338                                 }
3339                                 else {
3340                                         s390_lr  (code, ins->dreg, ins->sreg1);
3341                                         s390_xr  (code, ins->dreg, ins->sreg2);
3342                                 }
3343                         }
3344                 }
3345                         break;
3346                 case OP_XOR_IMM:
3347                 case OP_IXOR_IMM: {
3348                         if (s390_is_imm16 (ins->inst_imm)) {
3349                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3350                                 if (ins->dreg != ins->sreg1) {
3351                                         s390_lr   (code, ins->dreg, ins->sreg1);
3352                                 }
3353                                 s390_xr   (code, ins->dreg, s390_r0);
3354                         } else {
3355                                 s390_basr (code, s390_r13, 0);
3356                                 s390_j    (code, 4);
3357                                 s390_word (code, ins->inst_imm);
3358                                 if (ins->dreg != ins->sreg1) {
3359                                         s390_lr   (code, ins->dreg, ins->sreg1);
3360                                 }
3361                                 s390_x    (code, ins->dreg, 0, s390_r13, 4);
3362                         }
3363                 }
3364                         break;
3365                 case OP_ISHL: {
3366                         CHECK_SRCDST_NCOM;
3367                         s390_sll  (code, ins->dreg, src2, 0);
3368                 }
3369                         break;
3370                 case OP_SHL_IMM:
3371                 case OP_ISHL_IMM: {
3372                         if (ins->sreg1 != ins->dreg) {
3373                                 s390_lr   (code, ins->dreg, ins->sreg1);
3374                         }
3375                         s390_sll  (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3376                 }
3377                         break;
3378                 case OP_ISHR: {
3379                         CHECK_SRCDST_NCOM;
3380                         s390_sra  (code, ins->dreg, src2, 0);
3381                 }
3382                         break;
3383                 case OP_SHR_IMM:
3384                 case OP_ISHR_IMM: {
3385                         if (ins->sreg1 != ins->dreg) {
3386                                 s390_lr   (code, ins->dreg, ins->sreg1);
3387                         }
3388                         s390_sra  (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3389                 }
3390                         break;
3391                 case OP_SHR_UN_IMM:
3392                 case OP_ISHR_UN_IMM: {
3393                         if (ins->sreg1 != ins->dreg) {
3394                                 s390_lr   (code, ins->dreg, ins->sreg1);
3395                         }
3396                         s390_srl  (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3397                 }
3398                         break;
3399                 case OP_ISHR_UN: {
3400                         CHECK_SRCDST_NCOM;
3401                         s390_srl  (code, ins->dreg, src2, 0);
3402                 }
3403                         break;
3404                 case OP_INOT: {
3405                         if (ins->sreg1 != ins->dreg) {
3406                                 s390_lr   (code, ins->dreg, ins->sreg1);
3407                         }
3408                         s390_lhi (code, s390_r0, -1);
3409                         s390_xr  (code, ins->dreg, s390_r0);
3410                 }
3411                         break;
3412                 case OP_INEG: {
3413                         s390_lcr (code, ins->dreg, ins->sreg1);
3414                 }
3415                         break;
3416                 case OP_S390_LNEG: {
3417                         /* From gcc code */
3418                         g_assert (ins->dreg + 1 != ins->sreg1);
3419                         s390_lcr (code, ins->dreg + 1, ins->sreg2);
3420                         s390_lcr (code, ins->dreg, ins->sreg1);
3421                         s390_je (code, 3);
3422                         s390_bctr (code, ins->dreg + 1, 0);
3423                 }
3424                         break;
3425                 case OP_IMUL: {
3426                         if (ins->sreg1 == ins->dreg) {
3427                                 s390_msr  (code, ins->dreg, ins->sreg2);
3428                         }
3429                         else {
3430                                 if (ins->sreg2 == ins->dreg) {
3431                                         s390_msr (code, ins->dreg, ins->sreg1);
3432                                 }
3433                                 else {
3434                                         s390_lr  (code, ins->dreg, ins->sreg1);
3435                                         s390_msr (code, ins->dreg, ins->sreg2);
3436                                 }
3437                         }
3438                 }
3439                         break;
3440                 case OP_MUL_IMM:
3441                 case OP_IMUL_IMM: {
3442                         if (s390_is_imm16 (ins->inst_imm)) {
3443                                 s390_lhi  (code, s390_r13, ins->inst_imm);
3444                         } else {
3445                                 s390_basr (code, s390_r13, 0);
3446                                 s390_j    (code, 4);
3447                                 s390_word (code, ins->inst_imm);
3448 //                              if (ins->dreg != ins->sreg1) {
3449 //                                      s390_lr   (code, ins->dreg, ins->sreg1);
3450 //                              }
3451                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3452                         }
3453                         if (ins->dreg != ins->sreg1) {
3454                                 s390_lr   (code, ins->dreg, ins->sreg1);
3455                         }
3456                         s390_msr  (code, ins->dreg, s390_r13);
3457                 }
3458                         break;
3459                 case OP_IMUL_OVF: {
3460                         short int *o[2];
3461                         s390_ltr  (code, s390_r1, ins->sreg1);
3462                         s390_jz   (code, 0); CODEPTR(code, o[0]);
3463                         s390_ltr  (code, s390_r0, ins->sreg2);
3464                         s390_jnz  (code, 6);
3465                         s390_lhi  (code, s390_r1, 0);
3466                         s390_j    (code, 0); CODEPTR(code, o[1]);
3467                         s390_xr   (code, s390_r0, s390_r1);
3468                         s390_msr  (code, s390_r1, ins->sreg2);
3469                         s390_xr   (code, s390_r0, s390_r1);
3470                         s390_srl  (code, s390_r0, 0, 31);
3471                         s390_ltr  (code, s390_r0, s390_r0);
3472                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3473                         PTRSLOT   (code, o[0]);
3474                         PTRSLOT   (code, o[1]);
3475                         s390_lr   (code, ins->dreg, s390_r1);
3476                 }
3477                         break;
3478                 case OP_IMUL_OVF_UN: {
3479                         s390_lhi  (code, s390_r0, 0);
3480                         s390_lr   (code, s390_r1, ins->sreg1);
3481                         s390_mlr  (code, s390_r0, ins->sreg2);
3482                         s390_ltr  (code, s390_r0, s390_r0);
3483                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3484                         s390_lr   (code, ins->dreg, s390_r1);
3485                 }
3486                         break;
3487                 case OP_LMUL: {
3488                         s390_l    (code, s390_r0, 0, ins->sreg1, 4);
3489                         s390_srda (code, s390_r0, 0, 32);
3490                         s390_m    (code, s390_r0, 0, ins->sreg2, 4);
3491                         s390_l    (code, s390_r0, 0, ins->sreg1, 4);
3492                         s390_srl  (code, s390_r0, 0, 31);
3493                         s390_a    (code, s390_r0, 0, ins->sreg1, 0);
3494                         s390_l    (code, s390_r13, 0, ins->sreg2, 0);
3495                         s390_srl  (code, s390_r13, 0, 31);
3496                         s390_ms   (code, s390_r13, 0, ins->sreg1, 4);
3497                         s390_ar   (code, s390_r0, s390_r13);
3498                         s390_st   (code, s390_r0, 0, ins->dreg, 0);
3499                         s390_st   (code, s390_r1, 0, ins->dreg, 4);
3500                 }
3501                         break;
3502                 case OP_ICONST: {
3503                         if (s390_is_imm16(ins->inst_c0)) {
3504                                 s390_lhi  (code, ins->dreg, ins->inst_c0);
3505                         } else {
3506                                 s390_basr (code, s390_r13, 0);
3507                                 s390_j    (code, 4);
3508                                 s390_word (code, ins->inst_c0);
3509                                 s390_l    (code, ins->dreg, 0, s390_r13, 4);
3510                         }
3511                 }
3512                         break;
3513                 case OP_AOTCONST: {
3514                         s390_basr (code, s390_r13, 0);
3515                         s390_j    (code, 4);
3516                         mono_add_patch_info (cfg, code - cfg->native_code,
3517                                 (MonoJumpInfoType)ins->inst_i1, ins->inst_p0);
3518                         s390_word (code, 0);
3519                         s390_l    (code,ins->dreg, 0, s390_r13, 4);
3520                 }
3521                         break;
3522                 case OP_JUMP_TABLE: {
3523                         mono_add_patch_info (cfg, code - cfg->native_code,
3524                                 (MonoJumpInfoType)ins->inst_i1, ins->inst_p0);
3525                         s390_basr (code, s390_r13, 0);
3526                         s390_j    (code, 4);
3527                         s390_word (code, 0);
3528                         s390_l    (code, ins->dreg, 0, s390_r13, 4);
3529                 }
3530                         break;
3531                 case OP_ICONV_TO_I4:
3532                 case OP_ICONV_TO_U4:
3533                 case OP_MOVE: {
3534                         if (ins->dreg != ins->sreg1) {
3535                                 s390_lr (code, ins->dreg, ins->sreg1);
3536                         }
3537                 }
3538                         break;
3539                 case OP_SETLRET: {
3540                         int saved = ins->sreg1;
3541                         if (ins->sreg1 == s390_r2) {
3542                                 s390_lr (code, s390_r0, ins->sreg1);
3543                                 saved = s390_r0;
3544                         }
3545                         if (ins->sreg2 != s390_r2)
3546                                 s390_lr (code, s390_r2, ins->sreg2);
3547                         if (saved != s390_r3)
3548                                 s390_lr (code, s390_r3, saved);
3549                         break;
3550                 }
3551                 case OP_FMOVE: {
3552                         if (ins->dreg != ins->sreg1) {
3553                                 s390_ldr   (code, ins->dreg, ins->sreg1);
3554                         }
3555                 }
3556                         break;
3557                 case OP_S390_SETF4RET: {
3558                         s390_ledbr (code, ins->dreg, ins->sreg1);
3559                 }
3560                         break;
3561                 case OP_TLS_GET: {
3562                         if (s390_is_imm16 (ins->inst_offset)) {
3563                                 s390_lhi (code, s390_r13, ins->inst_offset);
3564                         } else {
3565                                 s390_bras (code, s390_r13, 0);
3566                                 s390_j    (code, 4);
3567                                 s390_word (code, ins->inst_offset);
3568                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3569                         }
3570                         s390_ear (code, s390_r1, 0);
3571                         s390_l   (code, ins->dreg, s390_r13, s390_r1, 0);
3572                 }
3573                         break;
3574                 case OP_FCONV_TO_R4: {
3575                         // FIXME:
3576                         if (ins->dreg != ins->sreg1) {
3577                                 s390_ldr   (code, ins->dreg, ins->sreg1);
3578                         }
3579                         /*
3580                         NOT_IMPLEMENTED;
3581                         if ((ins->next) &&
3582                              (ins->next->opcode != OP_FMOVE) &&
3583                              (ins->next->opcode != OP_STORER4_MEMBASE_REG))
3584                                 s390_ledbr (code, ins->dreg, ins->sreg1);
3585                         */
3586                 }
3587                         break;
3588                 case OP_JMP: {
3589                         if (cfg->method->save_lmf)
3590                                 restoreLMF(code, cfg->frame_reg, cfg->stack_usage);
3591
3592                         if (cfg->flags & MONO_CFG_HAS_TAIL) {
3593                                 code = emit_load_volatile_registers(code, cfg);
3594                         }
3595
3596                         code = backUpStackPtr(cfg, code, STK_BASE);
3597                         s390_l   (code, s390_r14, 0, STK_BASE, S390_RET_ADDR_OFFSET);
3598                         mono_add_patch_info (cfg, code - cfg->native_code,
3599                                              MONO_PATCH_INFO_METHOD_JUMP,
3600                                              ins->inst_p0);
3601                         s390_jcl (code, S390_CC_UN, 0);
3602                 }
3603                         break;
3604                 case OP_CHECK_THIS: {
3605                         /* ensure ins->sreg1 is not NULL */
3606                         s390_icm (code, s390_r0, 15, ins->sreg1, 0);
3607                 }
3608                         break;
3609                 case OP_ARGLIST: {
3610                         int offset = cfg->sig_cookie + cfg->stack_usage;
3611
3612                         if (s390_is_imm16 (offset))
3613                                 s390_lhi  (code, s390_r0, offset);
3614                         else {
3615                                 s390_basr (code, s390_r13, 0);
3616                                 s390_j    (code, 4);
3617                                 s390_word (code, offset);
3618                                 s390_l    (code, s390_r0, 0, s390_r13, 0);
3619                         }
3620                         s390_ar   (code, s390_r0, cfg->frame_reg);
3621                         s390_st   (code, s390_r0, 0, ins->sreg1, 0);
3622                 }
3623                         break;
3624                 case OP_FCALL: {
3625                         call = (MonoCallInst*)ins;
3626                         if (ins->flags & MONO_INST_HAS_METHOD)
3627                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_METHOD,
3628                                                      call->method);
3629                         else
3630                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS,
3631                                                      call->fptr);
3632                         s390_brasl (code, s390_r14, 0);
3633                         if (call->signature->ret->type == MONO_TYPE_R4)
3634                                 s390_ldebr (code, s390_f0, s390_f0);
3635                 }
3636                         break;
3637                 case OP_LCALL:
3638                 case OP_VCALL:
3639                 case OP_VCALL2:
3640                 case OP_VOIDCALL:
3641                 case OP_CALL: {
3642                         call = (MonoCallInst*)ins;
3643                         if (ins->flags & MONO_INST_HAS_METHOD)
3644                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_METHOD, call->method);
3645                         else
3646                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS, call->fptr);
3647                         s390_brasl (code, s390_r14, 0);
3648                 }
3649                         break;
3650                 case OP_FCALL_REG: {
3651                         call = (MonoCallInst*)ins;
3652                         s390_lr   (code, s390_r1, ins->sreg1);
3653                         s390_basr (code, s390_r14, s390_r1);
3654                         if (call->signature->ret->type == MONO_TYPE_R4)
3655                                 s390_ldebr (code, s390_f0, s390_f0);
3656                 }
3657                         break;
3658                 case OP_LCALL_REG:
3659                 case OP_VCALL_REG:
3660                 case OP_VCALL2_REG:
3661                 case OP_VOIDCALL_REG:
3662                 case OP_CALL_REG: {
3663                         s390_lr   (code, s390_r1, ins->sreg1);
3664                         s390_basr (code, s390_r14, s390_r1);
3665                 }
3666                         break;
3667                 case OP_LCALL_MEMBASE:
3668                 case OP_VCALL_MEMBASE:
3669                 case OP_VCALL2_MEMBASE:
3670                 case OP_VOIDCALL_MEMBASE:
3671                 case OP_FCALL_MEMBASE:
3672                 case OP_CALL_MEMBASE: {
3673                         call = (MonoCallInst*)ins;
3674                         if (s390_is_uimm12(ins->inst_offset))
3675                                 s390_l    (code, s390_r1, 0, ins->inst_basereg, ins->inst_offset);
3676                         else {
3677                                 if (s390_is_imm16(ins->inst_offset)) {
3678                                         s390_lhi (code, s390_r13, ins->inst_offset);
3679                                         s390_l   (code, s390_r1, s390_r13, ins->inst_basereg, 0);
3680                                 } else {
3681                                         s390_basr (code, s390_r13, 0);
3682                                         s390_j    (code, 4);
3683                                         s390_word (code, ins->inst_offset);
3684                                         s390_l    (code, s390_r13, 0, s390_r13, 4);
3685                                         s390_l    (code, s390_r1, s390_r13, ins->inst_basereg, 0);
3686                                 }
3687                         }
3688                         s390_basr (code, s390_r14, s390_r1);
3689                         if (ins->opcode == OP_FCALL_MEMBASE && call->signature->ret->type == MONO_TYPE_R4)
3690                                 s390_ldebr (code, s390_f0, s390_f0);
3691                 }
3692                         break;
3693                 case OP_LOCALLOC: {
3694                         /*------------------------------------------*/
3695                         /* To allocate space on the stack we have   */
3696                         /* to allow room for parameters passed in   */
3697                         /* calls, the backchain pointer and round   */
3698                         /* it to our stack alignment requirements   */
3699                         /*------------------------------------------*/
3700                         int alloca_skip = S390_MINIMAL_STACK_SIZE + cfg->param_area;
3701                         int area_offset = S390_ALIGN(alloca_skip, S390_STACK_ALIGNMENT);
3702                         s390_lr   (code, s390_r1, ins->sreg1);
3703                         if (ins->flags & MONO_INST_INIT)
3704                                 s390_lr   (code, s390_r0, ins->sreg1);
3705                         s390_ahi  (code, s390_r1, 14);
3706                         s390_srl  (code, s390_r1, 0, 3);
3707                         s390_sll  (code, s390_r1, 0, 3);
3708                         if (cfg->method->save_lmf) {
3709                                 /*----------------------------------*/
3710                                 /* we have to adjust lmf ebp value  */
3711                                 /*----------------------------------*/
3712                                 int lmfOffset = cfg->stack_usage - sizeof(MonoLMF);
3713
3714                                 s390_lr (code, s390_r13, cfg->frame_reg);
3715                                 if (s390_is_uimm16(lmfOffset))
3716                                         s390_ahi   (code, s390_r13, lmfOffset);
3717                                 else {
3718                                         s390_basr (code, s390_r14, 0);
3719                                         s390_j    (code, 4);
3720                                         s390_word (code, lmfOffset);
3721                                         s390_a    (code, s390_r13, 0, s390_r14, 4);
3722                                 }
3723                                 s390_lr (code, s390_r14, STK_BASE);
3724                                 s390_sr (code, s390_r14, s390_r1);
3725                                 s390_st (code, s390_r14, 0, s390_r13,
3726                                          G_STRUCT_OFFSET(MonoLMF, ebp));
3727                         }
3728                         s390_l    (code, s390_r13, 0, STK_BASE, 0);
3729                         s390_sr   (code, STK_BASE, s390_r1);
3730                         s390_st   (code, s390_r13, 0, STK_BASE, 0);
3731                         s390_la   (code, ins->dreg, 0, STK_BASE, area_offset);
3732                         s390_srl  (code, ins->dreg, 0, 3);
3733                         s390_sll  (code, ins->dreg, 0, 3);
3734                         if (ins->flags & MONO_INST_INIT) {
3735                                 s390_lr   (code, s390_r1, s390_r0);
3736                                 s390_lr   (code, s390_r0, ins->dreg);
3737                                 s390_lr   (code, s390_r14, s390_r12);
3738                                 s390_lhi  (code, s390_r13, 0);
3739                                 s390_mvcle(code, s390_r0, s390_r12, 0, 0);
3740                                 s390_jo   (code, -2);
3741                                 s390_lr   (code, s390_r12, s390_r14);
3742                         }
3743                 }
3744                         break;
3745                 case OP_THROW: {
3746                         s390_lr (code, s390_r2, ins->sreg1);
3747                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD,
3748                                              (gpointer)"mono_arch_throw_exception");
3749                         s390_brasl (code, s390_r14, 0);
3750                 }
3751                         break;
3752                 case OP_RETHROW: {
3753                         s390_lr (code, s390_r2, ins->sreg1);
3754                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD,
3755                                              (gpointer)"mono_arch_rethrow_exception");
3756                         s390_brasl (code, s390_r14, 0);
3757                 }
3758                         break;
3759                 case OP_START_HANDLER: {
3760                         MonoInst *spvar = mono_find_spvar_for_region (cfg, bb->region);
3761                         if (s390_is_uimm12 (spvar->inst_offset)) {
3762                                 s390_st   (code, s390_r14, 0,
3763                                            spvar->inst_basereg,
3764                                            spvar->inst_offset);
3765                         } else {
3766                                 s390_basr (code, s390_r13, 0);
3767                                 s390_j    (code, 4);
3768                                 s390_word (code, spvar->inst_offset);
3769                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3770                                 s390_st   (code, s390_r14, s390_r13,
3771                                                    spvar->inst_basereg, 0);
3772                         }
3773                 }
3774                         break;
3775                 case OP_ENDFILTER: {
3776                         MonoInst *spvar = mono_find_spvar_for_region (cfg, bb->region);
3777                         if (ins->sreg1 != s390_r2)
3778                                 s390_lr (code, s390_r2, ins->sreg1);
3779                         if (s390_is_uimm12 (spvar->inst_offset)) {
3780                                 s390_l  (code, s390_r14, 0, spvar->inst_basereg,
3781                                          spvar->inst_offset);
3782                         } else {
3783                                 s390_basr (code, s390_r13, 0);
3784                                 s390_j    (code, 4);
3785                                 s390_word (code, spvar->inst_offset);
3786                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3787                                 s390_l    (code, s390_r14, s390_r13,
3788                                                    spvar->inst_basereg, 0);
3789                         }
3790                         s390_br  (code, s390_r14);
3791                 }
3792                         break;
3793                 case OP_ENDFINALLY: {
3794                         MonoInst *spvar = mono_find_spvar_for_region (cfg, bb->region);
3795                         if (s390_is_uimm12 (spvar->inst_offset)) {
3796                                 s390_l  (code, s390_r14, 0, spvar->inst_basereg,
3797                                          spvar->inst_offset);
3798                         } else {
3799                                 s390_basr (code, s390_r13, 0);
3800                                 s390_j    (code, 4);
3801                                 s390_word (code, spvar->inst_offset);
3802                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3803                                 s390_l    (code, s390_r14, s390_r13,
3804                                                    spvar->inst_basereg, 0);
3805                         }
3806                         s390_br  (code, s390_r14);
3807                 }
3808                         break;
3809                 case OP_CALL_HANDLER: {
3810                         mono_add_patch_info (cfg, code-cfg->native_code,
3811                                              MONO_PATCH_INFO_BB, ins->inst_target_bb);
3812                         s390_brasl (code, s390_r14, 0);
3813                 }
3814                         break;
3815                 case OP_LABEL: {
3816                         ins->inst_c0 = code - cfg->native_code;
3817                 }
3818                         break;
3819                 case OP_RELAXED_NOP:
3820                 case OP_NOP:
3821                 case OP_DUMMY_USE:
3822                 case OP_DUMMY_STORE:
3823                 case OP_NOT_REACHED:
3824                 case OP_NOT_NULL: {
3825                 }
3826                         break;
3827                 case OP_BR:
3828                         EMIT_UNCOND_BRANCH(ins);
3829                         break;
3830                 case OP_BR_REG: {
3831                         s390_br  (code, ins->sreg1);
3832                 }
3833                         break;
3834                 case OP_CEQ:
3835                 case OP_ICEQ: {
3836                         s390_lhi (code, ins->dreg, 1);
3837                         s390_jz  (code, 4);
3838                         s390_lhi (code, ins->dreg, 0);
3839                 }
3840                         break;
3841                 case OP_CLT:
3842                 case OP_ICLT: {
3843                         s390_lhi (code, ins->dreg, 1);
3844                         s390_jl  (code, 4);
3845                         s390_lhi (code, ins->dreg, 0);
3846                 }
3847                         break;
3848                 case OP_CLT_UN:
3849                 case OP_ICLT_UN: {
3850                         s390_lhi (code, ins->dreg, 1);
3851                         s390_jlo (code, 4);
3852                         s390_lhi (code, ins->dreg, 0);
3853                 }
3854                         break;
3855                 case OP_CGT:
3856                 case OP_ICGT: {
3857                         s390_lhi (code, ins->dreg, 1);
3858                         s390_jh  (code, 4);
3859                         s390_lhi (code, ins->dreg, 0);
3860                 }
3861                         break;
3862                 case OP_CGT_UN:
3863                 case OP_ICGT_UN: {
3864                         s390_lhi (code, ins->dreg, 1);
3865                         s390_jho (code, 4);
3866                         s390_lhi (code, ins->dreg, 0);
3867                 }
3868                         break;
3869                 case OP_COND_EXC_EQ:
3870                 case OP_COND_EXC_IEQ:
3871                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_EQ, ins->inst_p1);
3872                         break;
3873                 case OP_COND_EXC_NE_UN:
3874                 case OP_COND_EXC_INE_UN:
3875                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NE, ins->inst_p1);
3876                         break;
3877                 case OP_COND_EXC_LT:
3878                 case OP_COND_EXC_ILT:
3879                 case OP_COND_EXC_LT_UN:
3880                 case OP_COND_EXC_ILT_UN:
3881                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, ins->inst_p1);
3882                         break;
3883                 case OP_COND_EXC_GT:
3884                 case OP_COND_EXC_IGT:
3885                 case OP_COND_EXC_GT_UN:
3886                 case OP_COND_EXC_IGT_UN:
3887                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GT, ins->inst_p1);
3888                         break;
3889                 case OP_COND_EXC_GE:
3890                 case OP_COND_EXC_IGE:
3891                 case OP_COND_EXC_GE_UN:
3892                 case OP_COND_EXC_IGE_UN:
3893                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GE, ins->inst_p1);
3894                         break;
3895                 case OP_COND_EXC_LE:
3896                 case OP_COND_EXC_ILE:
3897                 case OP_COND_EXC_LE_UN:
3898                 case OP_COND_EXC_ILE_UN:
3899                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LE, ins->inst_p1);
3900                         break;
3901                 case OP_COND_EXC_OV:
3902                 case OP_COND_EXC_IOV:
3903                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, ins->inst_p1);
3904                         break;
3905                 case OP_COND_EXC_NO:
3906                 case OP_COND_EXC_INO:
3907                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NO, ins->inst_p1);
3908                         break;
3909                 case OP_COND_EXC_C:
3910                 case OP_COND_EXC_IC:
3911                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, ins->inst_p1);
3912                         break;
3913                 case OP_COND_EXC_NC:
3914                 case OP_COND_EXC_INC:
3915                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, ins->inst_p1);
3916                         break;
3917                 case OP_IBEQ:
3918                         EMIT_COND_BRANCH (ins, S390_CC_EQ);
3919                         break;
3920                 case OP_IBNE_UN:
3921                         EMIT_COND_BRANCH (ins, S390_CC_NE);
3922                         break;
3923                 case OP_IBLT:
3924                 case OP_IBLT_UN:
3925                         EMIT_COND_BRANCH (ins, S390_CC_LT);
3926                         break;
3927                 case OP_IBGT:
3928                 case OP_IBGT_UN:
3929                         EMIT_COND_BRANCH (ins, S390_CC_GT);
3930                         break;
3931                 case OP_IBGE:
3932                 case OP_IBGE_UN:
3933                         EMIT_COND_BRANCH (ins, S390_CC_GE);
3934                         break;
3935                 case OP_IBLE:
3936                 case OP_IBLE_UN:
3937                         EMIT_COND_BRANCH (ins, S390_CC_LE);
3938                         break;
3939
3940                 /* floating point opcodes */
3941                 case OP_R8CONST: {
3942                         if (*((float *) ins->inst_p0) == 0) {
3943                                 s390_lzdr (code, ins->dreg);
3944                         } else {
3945                                 s390_basr  (code, s390_r13, 0);
3946                                 s390_j     (code, 4);
3947                                 s390_word  (code, ins->inst_p0);
3948                                 s390_l     (code, s390_r13, 0, s390_r13, 4);
3949                                 s390_ld    (code, ins->dreg, 0, s390_r13, 0);
3950                         }
3951                 }
3952                         break;
3953                 case OP_R4CONST: {
3954                         if (*((float *) ins->inst_p0) == 0) {
3955                                 s390_lzdr (code, ins->dreg);
3956                         } else {
3957                                 s390_basr (code, s390_r13, 0);
3958                                 s390_j    (code, 4);
3959                                 s390_word (code, ins->inst_p0);
3960                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3961                                 s390_ldeb (code, ins->dreg, 0, s390_r13, 0);
3962                         }
3963                 }
3964                         break;
3965                 case OP_STORER8_MEMBASE_REG: {
3966                         if (s390_is_uimm12(ins->inst_offset)) {
3967                                 s390_std  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
3968                         } else {
3969                                 s390_basr (code, s390_r13, 0);
3970                                 s390_j    (code, 4);
3971                                 s390_word (code, ins->inst_offset);
3972                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3973                                 s390_std  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
3974                         }
3975                 }
3976                         break;
3977                 case OP_LOADR8_MEMBASE: {
3978                         if (s390_is_uimm12(ins->inst_offset)) {
3979                                 s390_ld   (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
3980                         } else {
3981                                 s390_basr (code, s390_r13, 0);
3982                                 s390_j    (code, 4);
3983                                 s390_word (code, ins->inst_offset);
3984                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3985                                 s390_ld   (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
3986                         }
3987                 }
3988                         break;
3989                 case OP_STORER4_MEMBASE_REG: {
3990                         if (s390_is_uimm12(ins->inst_offset)) {
3991                                 s390_ledbr(code, s390_f15, ins->sreg1);
3992                                 s390_ste  (code, s390_f15, 0, ins->inst_destbasereg, ins->inst_offset);
3993                         } else {
3994                                 s390_basr (code, s390_r13, 0);
3995                                 s390_j    (code, 4);
3996                                 s390_word (code, ins->inst_offset);
3997                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3998                                 s390_ledbr(code, s390_f15, ins->sreg1);
3999                                 s390_ste  (code, s390_f15, s390_r13, ins->inst_destbasereg, 0);
4000                         }
4001                 }
4002                         break;
4003                 case OP_LOADR4_MEMBASE: {
4004                         if (s390_is_uimm12(ins->inst_offset)) {
4005                                 s390_ldeb (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
4006                         } else {
4007                                 s390_basr (code, s390_r13, 0);
4008                                 s390_j    (code, 4);
4009                                 s390_word (code, ins->inst_offset);
4010                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
4011                                 s390_ldeb (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
4012                         }
4013                 }
4014                         break;
4015                 case OP_ICONV_TO_R_UN: {
4016                         s390_cdfbr (code, ins->dreg, ins->sreg1);
4017                         s390_ltr   (code, ins->sreg1, ins->sreg1);
4018                         s390_jnl   (code, 12);
4019                         s390_basr  (code, s390_r13, 0);
4020                         s390_j     (code, 6);
4021                         s390_word  (code, 0x41f00000);
4022                         s390_word  (code, 0);
4023                         s390_adb   (code, ins->dreg, 0, s390_r13, 4);
4024                 }
4025                         break;
4026                 case OP_ICONV_TO_R4: {
4027                         s390_cdfbr (code, ins->dreg, ins->sreg1);
4028                 }
4029                         break;
4030                 case OP_ICONV_TO_R8: {
4031                         s390_cdfbr (code, ins->dreg, ins->sreg1);
4032                 }
4033                         break;
4034                 case OP_FCONV_TO_I1:
4035                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 1, TRUE);
4036                         break;
4037                 case OP_FCONV_TO_U1:
4038                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 1, FALSE);
4039                         break;
4040                 case OP_FCONV_TO_I2:
4041                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 2, TRUE);
4042                         break;
4043                 case OP_FCONV_TO_U2:
4044                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 2, FALSE);
4045                         break;
4046                 case OP_FCONV_TO_I4:
4047                 case OP_FCONV_TO_I:
4048                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 4, TRUE);
4049                         break;
4050                 case OP_FCONV_TO_U4:
4051                 case OP_FCONV_TO_U:
4052                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 4, FALSE);
4053                         break;
4054                 case OP_FCONV_TO_I8:
4055                 case OP_FCONV_TO_U8:
4056                         g_assert_not_reached ();
4057                         /* Implemented as helper calls */
4058                         break;
4059                 case OP_LCONV_TO_R_UN:
4060                         g_assert_not_reached ();
4061                         /* Implemented as helper calls */
4062                         break;
4063                 case OP_LCONV_TO_OVF_I:
4064                 case OP_LCONV_TO_OVF_I4_2: {
4065                         /* Valid ints: 0xffffffff:8000000 to 00000000:0x7f000000 */
4066                         short int *o[5];
4067                         s390_ltr  (code, ins->sreg1, ins->sreg1);
4068                         s390_jnl  (code, 0); CODEPTR(code, o[0]);
4069                         s390_ltr  (code, ins->sreg2, ins->sreg2);
4070                         s390_jnl  (code, 0); CODEPTR(code, o[1]);
4071                         s390_lhi  (code, s390_r13, -1);
4072                         s390_cr   (code, ins->sreg2, s390_r13);
4073                         s390_jnz  (code, 0); CODEPTR(code, o[2]);
4074                         s390_j    (code, 0); CODEPTR(code, o[3]);
4075                         PTRSLOT(code, o[0]);
4076                         s390_ltr  (code, ins->sreg2, ins->sreg2);
4077                         s390_jz   (code, 0); CODEPTR(code, o[4]);
4078                         PTRSLOT(code, o[1]);
4079                         PTRSLOT(code, o[2]);
4080                         mono_add_patch_info (cfg, code - cfg->native_code,
4081                                              MONO_PATCH_INFO_EXC, "OverflowException");
4082                         s390_brasl (code, s390_r14, 0);
4083                         PTRSLOT(code, o[3]);
4084                         PTRSLOT(code, o[4]);
4085                         if (ins->dreg != ins->sreg1)
4086                                 s390_lr   (code, ins->dreg, ins->sreg1);
4087                 }
4088                         break;
4089                 case OP_SQRT: {
4090                         s390_sqdbr (code, ins->dreg, ins->sreg1);
4091                 }
4092                         break;
4093                 case OP_FADD: {
4094                         CHECK_SRCDST_COM_F;
4095                         s390_adbr (code, ins->dreg, src2);
4096                 }
4097                         break;
4098                 case OP_FSUB: {
4099                         CHECK_SRCDST_NCOM_F;
4100                         s390_sdbr (code, ins->dreg, src2);
4101                 }
4102                         break;
4103                 case OP_FMUL: {
4104                         CHECK_SRCDST_COM_F;
4105                         s390_mdbr (code, ins->dreg, src2);
4106                 }
4107                         break;
4108                 case OP_FDIV: {
4109                         CHECK_SRCDST_NCOM_F;
4110                         s390_ddbr (code, ins->dreg, src2);
4111                 }
4112                         break;
4113                 case OP_FNEG: {
4114                         s390_lcdbr (code, ins->dreg, ins->sreg1);
4115                 }
4116                         break;
4117                 case OP_FREM: {
4118                         CHECK_SRCDST_NCOM_F;
4119                         s390_didbr (code, ins->dreg, src2, 5, s390_f15);
4120                 }
4121                         break;
4122                 case OP_FCOMPARE: {
4123                         s390_cdbr (code, ins->sreg1, ins->sreg2);
4124                 }
4125                         break;
4126                 case OP_FCEQ: {
4127                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4128                         s390_lhi   (code, ins->dreg, 1);
4129                         s390_je    (code, 4);
4130                         s390_lhi   (code, ins->dreg, 0);
4131                 }
4132                         break;
4133                 case OP_FCLT: {
4134                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4135                         s390_lhi   (code, ins->dreg, 1);
4136                         s390_jl    (code, 4);
4137                         s390_lhi   (code, ins->dreg, 0);
4138                 }
4139                         break;
4140                 case OP_FCLT_UN: {
4141                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4142                         s390_lhi   (code, ins->dreg, 1);
4143                         s390_jlo   (code, 4);
4144                         s390_lhi   (code, ins->dreg, 0);
4145                 }
4146                         break;
4147                 case OP_FCGT: {
4148                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4149                         s390_lhi   (code, ins->dreg, 1);
4150                         s390_jh    (code, 4);
4151                         s390_lhi   (code, ins->dreg, 0);
4152                 }
4153                         break;
4154                 case OP_FCGT_UN: {
4155                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4156                         s390_lhi   (code, ins->dreg, 1);
4157                         s390_jho   (code, 4);
4158                         s390_lhi   (code, ins->dreg, 0);
4159                 }
4160                         break;
4161                 case OP_FBEQ: {
4162                         short *o;
4163                         s390_jo (code, 0); CODEPTR(code, o);
4164                         EMIT_COND_BRANCH (ins, S390_CC_EQ);
4165                         PTRSLOT(code, o);
4166                 }
4167                         break;
4168                 case OP_FBNE_UN:
4169                         EMIT_COND_BRANCH (ins, S390_CC_NE|S390_CC_OV);
4170                         break;
4171                 case OP_FBLT: {
4172                         short *o;
4173                         s390_jo (code, 0); CODEPTR(code, o);
4174                         EMIT_COND_BRANCH (ins, S390_CC_LT);
4175                         PTRSLOT(code, o);
4176                 }
4177                         break;
4178                 case OP_FBLT_UN:
4179                         EMIT_COND_BRANCH (ins, S390_CC_LT|S390_CC_OV);
4180                         break;
4181                 case OP_FBGT: {
4182                         short *o;
4183                         s390_jo (code, 0); CODEPTR(code, o);
4184                         EMIT_COND_BRANCH (ins, S390_CC_GT);
4185                         PTRSLOT(code, o);
4186                 }
4187                         break;
4188                 case OP_FBGT_UN:
4189                         EMIT_COND_BRANCH (ins, S390_CC_GT|S390_CC_OV);
4190                         break;
4191                 case OP_FBGE: {
4192                         short *o;
4193                         s390_jo (code, 0); CODEPTR(code, o);
4194                         EMIT_COND_BRANCH (ins, S390_CC_GE);
4195                         PTRSLOT(code, o);
4196                 }
4197                         break;
4198                 case OP_FBGE_UN:
4199                         EMIT_COND_BRANCH (ins, S390_CC_GE|S390_CC_OV);
4200                         break;
4201                 case OP_FBLE: {
4202                         short *o;
4203                         s390_jo (code, 0); CODEPTR(code, o);
4204                         EMIT_COND_BRANCH (ins, S390_CC_LE);
4205                         PTRSLOT(code, o);
4206                 }
4207                         break;
4208                 case OP_FBLE_UN:
4209                         EMIT_COND_BRANCH (ins, S390_CC_LE|S390_CC_OV);
4210                         break;
4211                 case OP_CKFINITE: {
4212                         short *o;
4213                         s390_lhi  (code, s390_r13, 0x7f);
4214                         s390_tcdb (code, ins->sreg1, 0, s390_r13, 0);
4215                         s390_jz   (code, 0); CODEPTR(code, o);
4216                         mono_add_patch_info (cfg, code - cfg->native_code,
4217                                              MONO_PATCH_INFO_EXC, "ArithmeticException");
4218                         s390_brasl (code, s390_r14,0);
4219                         PTRSLOT(code, o);
4220                 }
4221                         break;
4222                 case OP_S390_MOVE: {
4223                         if (ins->backend.size > 0) {
4224                                 if (ins->backend.size <= 256) {
4225                                         s390_mvc  (code, ins->backend.size, ins->dreg,
4226                                                    ins->inst_offset, ins->sreg1, ins->inst_imm);
4227                                 } else {
4228                                         s390_lr   (code, s390_r0, ins->dreg);
4229                                         if (s390_is_imm16 (ins->inst_offset)) {
4230                                                 s390_ahi  (code, s390_r0, ins->inst_offset);
4231                                         } else {
4232                                                 s390_basr (code, s390_r13, 0);
4233                                                 s390_j    (code, 4);
4234                                                 s390_word (code, ins->inst_offset);
4235                                                 s390_a    (code, s390_r0, 0, s390_r13, 4);
4236                                         }
4237                                         s390_lr   (code, s390_r14, s390_r12);
4238                                         s390_lr   (code, s390_r12, ins->sreg1);
4239                                         if (s390_is_imm16 (ins->inst_imm)) {
4240                                                 s390_ahi  (code, s390_r12, ins->inst_imm);
4241                                         } else {
4242                                                 s390_basr (code, s390_r13, 0);
4243                                                 s390_j    (code, 4);
4244                                                 s390_word (code, ins->inst_imm);
4245                                                 s390_a    (code, s390_r12, 0, s390_r13, 4);
4246                                         }
4247                                         s390_lr   (code, s390_r1, ins->sreg1);
4248                                         s390_lr   (code, s390_r13, s390_r1);
4249                                         s390_mvcle(code, s390_r0, s390_r12, 0, 0);
4250                                         s390_jo   (code, -2);
4251                                         s390_lr   (code, s390_r12, s390_r14);
4252                                 }
4253                         }
4254                 }
4255                         break;
4256                 case OP_ATOMIC_ADD_I4: {
4257                         s390_lr  (code, s390_r1, ins->sreg2);
4258                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4259                         s390_a   (code, s390_r1, 0, ins->inst_basereg, ins->inst_offset);
4260                         s390_cs  (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
4261                         s390_jnz (code, -7);
4262                         s390_lr  (code, ins->dreg, s390_r1);
4263                 }
4264                         break;
4265                 case OP_ATOMIC_ADD_NEW_I4: {
4266                         s390_lr  (code, s390_r1, ins->sreg2);
4267                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4268                         s390_a   (code, s390_r1, 0, ins->inst_basereg, ins->inst_offset);
4269                         s390_cs  (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
4270                         s390_jnz (code, -7);
4271                         s390_lr  (code, ins->dreg, s390_r1);
4272                 }
4273                         break;
4274                 case OP_ATOMIC_EXCHANGE_I4: {
4275                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4276                         s390_cs  (code, s390_r0, ins->sreg2, ins->inst_basereg, ins->inst_offset);
4277                         s390_jnz (code, -4);
4278                         s390_lr  (code, ins->dreg, s390_r0);
4279                 }
4280                         break;
4281                 case OP_S390_BKCHAIN: {
4282                         s390_lr  (code, ins->dreg, ins->sreg1);
4283                         if (s390_is_imm16 (cfg->stack_offset)) {
4284                                 s390_ahi (code, ins->dreg, cfg->stack_offset);
4285                         } else {
4286                                 s390_basr (code, s390_r13, 0);
4287                                 s390_j    (code, 6);
4288                                 s390_word (code, cfg->stack_offset);
4289                                 s390_a    (code, ins->dreg, 0, s390_r13, 4);
4290                         }
4291                 }
4292                 case OP_MEMORY_BARRIER: {
4293                 }
4294                         break;
4295                 default:
4296                         g_warning ("unknown opcode %s in %s()\n", mono_inst_name (ins->opcode), __FUNCTION__);
4297                         g_assert_not_reached ();
4298                 }
4299
4300                 if ((cfg->opt & MONO_OPT_BRANCH) && ((code - cfg->native_code - offset) > max_len)) {
4301                         g_warning ("wrong maximal instruction length of instruction %s (expected %d, got %d)",
4302                                    mono_inst_name (ins->opcode), max_len, code - cfg->native_code - offset);
4303                         g_assert_not_reached ();
4304                 }
4305
4306                 cpos += max_len;
4307
4308                 last_ins = ins;
4309                 last_offset = offset;
4310         }
4311
4312         cfg->code_len = code - cfg->native_code;
4313 }
4314
4315 /*========================= End of Function ========================*/
4316
4317 /*------------------------------------------------------------------*/
4318 /*                                                                  */
4319 /* Name         - mono_arch_register_lowlevel_calls                 */
4320 /*                                                                  */
4321 /* Function     - Register routines to help with --trace operation. */
4322 /*                                                                  */
4323 /*------------------------------------------------------------------*/
4324
4325 void
4326 mono_arch_register_lowlevel_calls (void)
4327 {
4328         mono_register_jit_icall (mono_arch_get_lmf_addr, "mono_arch_get_lmf_addr", NULL, TRUE);
4329 }
4330
4331 /*========================= End of Function ========================*/
4332
4333 /*------------------------------------------------------------------*/
4334 /*                                                                  */
4335 /* Name         - mono_arch_patch_code                              */
4336 /*                                                                  */
4337 /* Function     - Process the patch data created during the         */
4338 /*                instruction build process. This resolves jumps,   */
4339 /*                calls, variables etc.                             */
4340 /*                                                                  */
4341 /*------------------------------------------------------------------*/
4342
4343 void
4344 mono_arch_patch_code (MonoMethod *method, MonoDomain *domain,
4345                       guint8 *code, MonoJumpInfo *ji, gboolean run_cctors)
4346 {
4347         MonoJumpInfo *patch_info;
4348
4349         for (patch_info = ji; patch_info; patch_info = patch_info->next) {
4350                 unsigned char *ip = patch_info->ip.i + code;
4351                 gconstpointer target = NULL;
4352
4353                 target = mono_resolve_patch_target (method, domain, code,
4354                                                     patch_info, run_cctors);
4355
4356                 switch (patch_info->type) {
4357                         case MONO_PATCH_INFO_IP:
4358                         case MONO_PATCH_INFO_EXC_NAME:
4359                         case MONO_PATCH_INFO_LDSTR:
4360                         case MONO_PATCH_INFO_TYPE_FROM_HANDLE:
4361                         case MONO_PATCH_INFO_LDTOKEN:
4362                         case MONO_PATCH_INFO_EXC:
4363                                 continue;
4364                         case MONO_PATCH_INFO_SWITCH:
4365                                 /*----------------------------------*/
4366                                 /* ip points at the basr r13,0/j +4 */
4367                                 /* instruction the vtable value     */
4368                                 /* follows this (i.e. ip+6)         */
4369                                 /*----------------------------------*/
4370                                 *((gconstpointer *)(ip+6)) = target;
4371                                 target = NULL;
4372                                 continue;
4373                         case MONO_PATCH_INFO_METHODCONST:
4374                         case MONO_PATCH_INFO_CLASS:
4375                         case MONO_PATCH_INFO_IMAGE:
4376                         case MONO_PATCH_INFO_FIELD:
4377                         case MONO_PATCH_INFO_IID:
4378                                 target = S390_RELATIVE(target, ip);
4379                                 continue;
4380                         case MONO_PATCH_INFO_R4:
4381                         case MONO_PATCH_INFO_R8:
4382                         case MONO_PATCH_INFO_METHOD_REL:
4383                                 g_assert_not_reached ();
4384                                 continue;
4385                         default:
4386                                 target = S390_RELATIVE(target, ip);
4387                                 ip += 2;
4388                 }
4389                 s390_patch (ip, (guint32) target);
4390         }
4391 }
4392
4393 /*========================= End of Function ========================*/
4394
4395 /*------------------------------------------------------------------*/
4396 /*                                                                  */
4397 /* Name         - emit_load_volatile_registers                      */
4398 /*                                                                  */
4399 /* Function     - Create the instruction sequence for loading the   */
4400 /*                parameter registers for use with the 'tail' op.   */
4401 /*                                                                  */
4402 /*                The register loading operations performed here    */
4403 /*                are the mirror of the store operations performed  */
4404 /*                in mono_arch_emit_prolog and need to be kept in   */
4405 /*                synchronization with it.                          */
4406 /*                                                                  */
4407 /*------------------------------------------------------------------*/
4408
4409 guint8 *
4410 emit_load_volatile_registers (guint8 * code, MonoCompile *cfg)
4411 {
4412         MonoMethod *method = cfg->method;
4413         MonoMethodSignature *sig;
4414         MonoInst *inst;
4415         int pos, i;
4416         CallInfo *cinfo;
4417
4418         sig = mono_method_signature (method);
4419         pos = 0;
4420
4421         cinfo = get_call_info (cfg, cfg->mempool, sig, sig->pinvoke);
4422
4423         if (cinfo->struct_ret) {
4424                 ArgInfo *ainfo = &cinfo->ret;
4425                 inst         = cfg->vret_addr;
4426                 s390_l (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4427         }
4428
4429         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
4430                 ArgInfo *ainfo = cinfo->args + i;
4431                 inst = cfg->args [pos];
4432
4433                 if (inst->opcode == OP_REGVAR) {
4434                         if (ainfo->regtype == RegTypeGeneral)
4435                                 s390_lr (code, ainfo->reg, inst->dreg);
4436                         else if (ainfo->regtype == RegTypeFP) {
4437                                 if (inst->dreg != ainfo->reg) {
4438                                         if (ainfo->size == 4) {
4439                                                 s390_ldebr (code, ainfo->reg, inst->dreg);
4440                                         } else {
4441                                                 s390_ldr   (code, ainfo->reg, inst->dreg);
4442                                         }
4443                                 }
4444                         }
4445                         else if (ainfo->regtype == RegTypeBase) {
4446                         } else
4447                                 g_assert_not_reached ();
4448                 } else {
4449                         if (ainfo->regtype == RegTypeGeneral) {
4450                                 if (!((ainfo->reg >= 2) && (ainfo->reg <= 6)))
4451                                         g_assert_not_reached();
4452                                 switch (ainfo->size) {
4453                                 case 1:
4454                                         s390_ic (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4455                                         break;
4456                                 case 2:
4457                                         s390_lh (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4458                                         break;
4459                                 case 8:
4460                                         s390_lm (code, ainfo->reg, ainfo->reg + 1,
4461                                                   inst->inst_basereg, inst->inst_offset);
4462                                         break;
4463                                 default:
4464                                         s390_l  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4465                                 }
4466                         } else if (ainfo->regtype == RegTypeBase) {
4467                         } else if (ainfo->regtype == RegTypeFP) {
4468                                 if (ainfo->size == 8)
4469                                         s390_ld (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4470                                 else if (ainfo->size == 4)
4471                                         s390_le (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4472                                 else
4473                                         g_assert_not_reached ();
4474                         } else if (ainfo->regtype == RegTypeStructByVal) {
4475                                 if (ainfo->reg != STK_BASE) {
4476                                         switch (ainfo->size) {
4477                                         case 1:
4478                                                 s390_ic (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4479                                                 break;
4480                                         case 2:
4481                                                 s390_lh (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4482                                                 break;
4483                                         case 4:
4484                                                 s390_l  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4485                                                 break;
4486                                         case 8:
4487                                                 s390_lm (code, ainfo->reg, ainfo->reg+1, inst->inst_basereg, inst->inst_offset);
4488                                                 break;
4489                                         }
4490                                 }
4491                         } else if (ainfo->regtype == RegTypeStructByAddr) {
4492                                 if (ainfo->reg != STK_BASE) {
4493                                         s390_l  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4494                                 }
4495                         } else
4496                                 g_assert_not_reached ();
4497                 }
4498                 pos++;
4499         }
4500
4501         return code;
4502 }
4503
4504 /*========================= End of Function ========================*/
4505
4506 /*------------------------------------------------------------------*/
4507 /*                                                                  */
4508 /* Name         - mono_arch_emit_prolog                             */
4509 /*                                                                  */
4510 /* Function     - Create the instruction sequence for a function    */
4511 /*                prolog.                                           */
4512 /*                                                                  */
4513 /*------------------------------------------------------------------*/
4514
4515 guint8 *
4516 mono_arch_emit_prolog (MonoCompile *cfg)
4517 {
4518         MonoMethod *method = cfg->method;
4519         MonoBasicBlock *bb;
4520         MonoMethodSignature *sig;
4521         MonoInst *inst;
4522         int alloc_size, pos, max_offset, i;
4523         guint8 *code;
4524         CallInfo *cinfo;
4525         int tracing = 0;
4526         int lmfOffset;                                                          \
4527
4528         if (mono_jit_trace_calls != NULL && mono_trace_eval (method))
4529                 tracing = 1;
4530
4531         cfg->code_size   = 1024;
4532         cfg->native_code = code = g_malloc (cfg->code_size);
4533
4534         s390_stm  (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
4535
4536         if (cfg->arch.bkchain_reg != -1)
4537                 s390_lr (code, cfg->arch.bkchain_reg, STK_BASE);
4538
4539         if (cfg->flags & MONO_CFG_HAS_ALLOCA) {
4540                 cfg->used_int_regs |= 1 << 11;
4541         }
4542
4543         alloc_size = cfg->stack_offset;
4544
4545         cfg->stack_usage = alloc_size;
4546         s390_lr   (code, s390_r11, STK_BASE);
4547         if (s390_is_uimm16 (alloc_size)) {
4548                 s390_ahi  (code, STK_BASE, -alloc_size);
4549         } else {
4550                 int stackSize = alloc_size;
4551                 while (stackSize > 32767) {
4552                         s390_ahi  (code, STK_BASE, -32767);
4553                         stackSize -= 32767;
4554                 }
4555                 s390_ahi  (code, STK_BASE, -stackSize);
4556         }
4557         s390_st   (code, s390_r11, 0, STK_BASE, 0);
4558
4559         if (cfg->frame_reg != STK_BASE)
4560                 s390_lr (code, s390_r11, STK_BASE);
4561
4562         /* compute max_offset in order to use short forward jumps
4563          * we always do it on s390 because the immediate displacement
4564          * for jumps is too small
4565          */
4566         max_offset = 0;
4567         for (bb = cfg->bb_entry; bb; bb = bb->next_bb) {
4568                 MonoInst *ins = bb->code;
4569                 bb->max_offset = max_offset;
4570
4571                 if (cfg->prof_options & MONO_PROFILE_COVERAGE)
4572                         max_offset += 6;
4573
4574                 MONO_BB_FOR_EACH_INS (bb, ins)
4575                         max_offset += ((guint8 *)ins_get_spec (ins->opcode))[MONO_INST_LEN];
4576         }
4577
4578         /* load arguments allocated to register from the stack */
4579         sig = mono_method_signature (method);
4580         pos = 0;
4581
4582         cinfo = get_call_info (cfg, cfg->mempool, sig, sig->pinvoke);
4583
4584         if (cinfo->struct_ret) {
4585                 ArgInfo *ainfo = &cinfo->ret;
4586                 inst         = cfg->vret_addr;
4587                 inst->backend.size = ainfo->vtsize;
4588                 s390_st (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4589         }
4590
4591         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
4592                 ArgInfo *ainfo = cinfo->args + i;
4593                 inst = cfg->args [pos];
4594
4595                 if (inst->opcode == OP_VTARG_ADDR)
4596                         inst = inst->inst_left;
4597
4598                 if (inst->opcode == OP_REGVAR) {
4599                         if (ainfo->regtype == RegTypeGeneral)
4600                                 s390_lr (code, inst->dreg, ainfo->reg);
4601                         else if (ainfo->regtype == RegTypeFP) {
4602                                 if (inst->dreg != ainfo->reg) {
4603                                         if (ainfo->size == 4) {
4604                                                 s390_ledbr (code, inst->dreg, ainfo->reg);
4605                                         } else {
4606                                                 s390_ldr   (code, inst->dreg, ainfo->reg);
4607                                         }
4608                                 }
4609                         }
4610                         else if (ainfo->regtype == RegTypeBase) {
4611                                 s390_lr  (code, s390_r13, STK_BASE);
4612                                 s390_ahi (code, s390_r13, alloc_size);
4613                                 s390_l   (code, inst->dreg, 0, s390_r13, ainfo->offset);
4614                         } else
4615                                 g_assert_not_reached ();
4616
4617                         if (cfg->verbose_level > 2)
4618                                 g_print ("Argument %d assigned to register %s\n",
4619                                          pos, mono_arch_regname (inst->dreg));
4620                 } else {
4621                         if (ainfo->regtype == RegTypeGeneral) {
4622                                 if (!((ainfo->reg >= 2) && (ainfo->reg <= 6)))
4623                                         g_assert_not_reached();
4624                                 switch (ainfo->size) {
4625                                 case 1:
4626                                         s390_stc (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4627                                         break;
4628                                 case 2:
4629                                         s390_sth (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4630                                         break;
4631                                 case 8:
4632                                         s390_stm (code, ainfo->reg, ainfo->reg + 1,
4633                                                   inst->inst_basereg, inst->inst_offset);
4634                                         break;
4635                                 default:
4636                                         s390_st  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4637                                 }
4638                         } else if (ainfo->regtype == RegTypeBase) {
4639                         } else if (ainfo->regtype == RegTypeFP) {
4640                                 if (ainfo->size == 8)
4641                                         s390_std (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4642                                 else if (ainfo->size == 4)
4643                                         s390_ste (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4644                                 else
4645                                         g_assert_not_reached ();
4646                         } else if (ainfo->regtype == RegTypeStructByVal) {
4647                                 int doffset = inst->inst_offset;
4648                                 int reg;
4649                                 if (ainfo->reg != STK_BASE)
4650                                         reg = ainfo->reg;
4651                                 else {
4652                                         reg = s390_r0;
4653                                         s390_lr  (code, s390_r13, STK_BASE);
4654                                         s390_ahi (code, s390_r13, alloc_size);
4655                                 }
4656                                 switch (ainfo->size) {
4657                                         case 1:
4658                                                 if (ainfo->reg == STK_BASE)
4659                                                         s390_ic  (code, reg, 0, s390_r13, ainfo->offset+3);
4660                                                 s390_stc (code, reg, 0, inst->inst_basereg, doffset);
4661                                                 break;
4662                                         case 2:
4663                                                 if (ainfo->reg == STK_BASE)
4664                                                         s390_lh  (code, reg, 0, s390_r13, ainfo->offset+2);
4665                                                 s390_sth (code, reg, 0, inst->inst_basereg, doffset);
4666                                                 break;
4667                                         case 4:
4668                                                 if (ainfo->reg == STK_BASE)
4669                                                         s390_l   (code, reg, 0, s390_r13, ainfo->offset);
4670                                                 s390_st  (code, reg, 0, inst->inst_basereg, doffset);
4671                                                 break;
4672                                         case 8:
4673                                                 if (ainfo->reg == STK_BASE)
4674                                                         s390_lm  (code, s390_r0, s390_r1, s390_r13, ainfo->offset);
4675                                                 s390_stm (code, reg, reg+1, inst->inst_basereg, doffset);
4676                                                 break;
4677                                 }
4678                         } else if (ainfo->regtype == RegTypeStructByAddr) {
4679                                 if (ainfo->reg != STK_BASE)
4680                                         s390_st  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4681                         } else
4682                                 g_assert_not_reached ();
4683                 }
4684                 pos++;
4685         }
4686
4687         if (method->save_lmf) {
4688                 /*---------------------------------------------------------------*/
4689                 /* we build the MonoLMF structure on the stack - see mini-s390.h */
4690                 /*---------------------------------------------------------------*/
4691                 lmfOffset = alloc_size - sizeof(MonoLMF);
4692
4693                 s390_lr    (code, s390_r13, cfg->frame_reg);
4694                 if (s390_is_uimm16(lmfOffset))
4695                         s390_ahi   (code, s390_r13, lmfOffset);
4696                 else {
4697                         s390_basr (code, s390_r14, 0);
4698                         s390_j    (code, 4);
4699                         s390_word (code, lmfOffset);
4700                         s390_a    (code, s390_r13, 0, s390_r14, 4);
4701                 }
4702
4703                 /*---------------------------------------------------------------*/
4704                 /* Preserve the parameter registers while we fix up the lmf      */
4705                 /*---------------------------------------------------------------*/
4706                 s390_stm   (code, s390_r2, s390_r6, s390_r13,
4707                             G_STRUCT_OFFSET(MonoLMF, pregs[0]));
4708
4709                 /*---------------------------------------------------------------*/
4710                 /* On return from this call r2 have the address of the &lmf      */
4711                 /*---------------------------------------------------------------*/
4712                 mono_add_patch_info (cfg, code - cfg->native_code,
4713                                      MONO_PATCH_INFO_INTERNAL_METHOD,
4714                                      (gpointer)"mono_get_lmf_addr");
4715                 s390_brasl (code, s390_r14, 0);
4716
4717                 /*---------------------------------------------------------------*/
4718                 /* Set lmf.lmf_addr = jit_tls->lmf                               */
4719                 /*---------------------------------------------------------------*/
4720                 s390_st    (code, s390_r2, 0, s390_r13,
4721                             G_STRUCT_OFFSET(MonoLMF, lmf_addr));
4722
4723                 /*---------------------------------------------------------------*/
4724                 /* Get current lmf                                               */
4725                 /*---------------------------------------------------------------*/
4726                 s390_l     (code, s390_r0, 0, s390_r2, 0);
4727
4728                 /*---------------------------------------------------------------*/
4729                 /* Set our lmf as the current lmf                                */
4730                 /*---------------------------------------------------------------*/
4731                 s390_st    (code, s390_r13, 0, s390_r2, 0);
4732
4733                 /*---------------------------------------------------------------*/
4734                 /* Have our lmf.previous_lmf point to the last lmf               */
4735                 /*---------------------------------------------------------------*/
4736                 s390_st    (code, s390_r0, 0, s390_r13,
4737                             G_STRUCT_OFFSET(MonoLMF, previous_lmf));
4738
4739                 /*---------------------------------------------------------------*/
4740                 /* save method info                                              */
4741                 /*---------------------------------------------------------------*/
4742                 s390_basr  (code, s390_r1, 0);
4743                 s390_j     (code, 4);
4744                 s390_word  (code, method);
4745                 s390_l     (code, s390_r1, 0, s390_r1, 4);
4746                 s390_st    (code, s390_r1, 0, s390_r13,
4747                             G_STRUCT_OFFSET(MonoLMF, method));
4748
4749                 /*---------------------------------------------------------------*/
4750                 /* save the current IP                                           */
4751                 /*---------------------------------------------------------------*/
4752                 s390_st    (code, STK_BASE, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, ebp));
4753                 s390_basr  (code, s390_r1, 0);
4754                 s390_la    (code, s390_r1, 0, s390_r1, 0);
4755                 s390_st    (code, s390_r1, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, eip));
4756
4757                 /*---------------------------------------------------------------*/
4758                 /* Save general and floating point registers                     */
4759                 /*---------------------------------------------------------------*/
4760                 s390_stm   (code, s390_r2, s390_r12, s390_r13,
4761                             G_STRUCT_OFFSET(MonoLMF, gregs[2]));
4762                 for (i = 0; i < 16; i++) {
4763                         s390_std  (code, i, 0, s390_r13,
4764                                    G_STRUCT_OFFSET(MonoLMF, fregs[i]));
4765                 }
4766
4767                 /*---------------------------------------------------------------*/
4768                 /* Restore the parameter registers now that we've set up the lmf */
4769                 /*---------------------------------------------------------------*/
4770                 s390_lm    (code, s390_r2, s390_r6, s390_r13,
4771                             G_STRUCT_OFFSET(MonoLMF, pregs[0]));
4772         }
4773
4774         if (tracing)
4775                 code = mono_arch_instrument_prolog(cfg, enter_method, code, TRUE);
4776
4777         cfg->code_len = code - cfg->native_code;
4778
4779         g_assert (cfg->code_len < cfg->code_size);
4780
4781         return code;
4782 }
4783
4784 /*========================= End of Function ========================*/
4785
4786 /*------------------------------------------------------------------*/
4787 /*                                                                  */
4788 /* Name         - mono_arch_emit_epilog                             */
4789 /*                                                                  */
4790 /* Function     - Emit the instructions for a function epilog.      */
4791 /*                                                                  */
4792 /*------------------------------------------------------------------*/
4793
4794 void
4795 mono_arch_emit_epilog (MonoCompile *cfg)
4796 {
4797         MonoMethod *method = cfg->method;
4798         int tracing = 0;
4799         guint8 *code;
4800         int max_epilog_size = 96;
4801
4802         if (cfg->method->save_lmf)
4803                 max_epilog_size += 128;
4804
4805         if (mono_jit_trace_calls != NULL)
4806                 max_epilog_size += 128;
4807
4808         if (cfg->prof_options & MONO_PROFILE_ENTER_LEAVE)
4809                 max_epilog_size += 128;
4810
4811         while ((cfg->code_len + max_epilog_size) > (cfg->code_size - 16)) {
4812                 cfg->code_size  *= 2;
4813                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
4814                 mono_jit_stats.code_reallocs++;
4815         }
4816
4817         code = cfg->native_code + cfg->code_len;
4818
4819         if (mono_jit_trace_calls != NULL && mono_trace_eval (method)) {
4820                 code = mono_arch_instrument_epilog (cfg, leave_method, code, TRUE);
4821                 tracing = 1;
4822         }
4823
4824         if (method->save_lmf)
4825                 restoreLMF(code, cfg->frame_reg, cfg->stack_usage);
4826
4827         if (cfg->flags & MONO_CFG_HAS_ALLOCA)
4828                 s390_l (code, STK_BASE, 0, STK_BASE, 0);
4829         else
4830                 code = backUpStackPtr(cfg, code, STK_BASE);
4831
4832         s390_lm  (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
4833         s390_br  (code, s390_r14);
4834
4835         cfg->code_len = code - cfg->native_code;
4836
4837         g_assert (cfg->code_len < cfg->code_size);
4838
4839 }
4840
4841 /*========================= End of Function ========================*/
4842
4843 /*------------------------------------------------------------------*/
4844 /*                                                                  */
4845 /* Name         - mono_arch_emit_exceptions                         */
4846 /*                                                                  */
4847 /* Function     - Emit the blocks to handle exception conditions.   */
4848 /*                                                                  */
4849 /*------------------------------------------------------------------*/
4850
4851 void
4852 mono_arch_emit_exceptions (MonoCompile *cfg)
4853 {
4854         MonoJumpInfo    *patch_info;
4855         guint8          *code;
4856         int             nThrows = 0,
4857                         exc_count = 0,
4858                         iExc;
4859         guint32         code_size;
4860         MonoClass       *exc_classes [MAX_EXC];
4861         guint8          *exc_throw_start [MAX_EXC];
4862
4863         for (patch_info = cfg->patch_info;
4864              patch_info;
4865              patch_info = patch_info->next) {
4866                 if (patch_info->type == MONO_PATCH_INFO_EXC)
4867                         exc_count++;
4868         }
4869
4870         code_size = exc_count * 26;
4871
4872         while ((cfg->code_len + code_size) > (cfg->code_size - 16)) {
4873                 cfg->code_size  *= 2;
4874                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
4875                 mono_jit_stats.code_reallocs++;
4876         }
4877
4878         code = cfg->native_code + cfg->code_len;
4879
4880         /*---------------------------------------------------------------------*/
4881         /* Add code to raise exceptions                                        */
4882         /*---------------------------------------------------------------------*/
4883         for (patch_info = cfg->patch_info; patch_info; patch_info = patch_info->next) {
4884                 switch (patch_info->type) {
4885                 case MONO_PATCH_INFO_EXC: {
4886                         guint8 *ip = patch_info->ip.i + cfg->native_code;
4887                         MonoClass *exc_class;
4888                         guint32 throw_ip;
4889
4890                         /*-----------------------------------------------------*/
4891                         /* Patch the branch in epilog to come here             */
4892                         /*-----------------------------------------------------*/
4893                         s390_patch (ip + 2, (guint32) (S390_RELATIVE(code,ip)));
4894
4895                         exc_class = mono_class_from_name (mono_defaults.corlib,
4896                                                           "System",
4897                                                           patch_info->data.name);
4898                         g_assert (exc_class);
4899                         throw_ip = patch_info->ip.i;
4900
4901                         for (iExc = 0; iExc < nThrows; ++iExc)
4902                                 if (exc_classes [iExc] == exc_class)
4903                                         break;
4904
4905                         if (iExc < nThrows) {
4906                                 s390_jcl (code, S390_CC_UN, (guint32) exc_throw_start [iExc]);
4907                                 patch_info->type = MONO_PATCH_INFO_NONE;
4908                         } else {
4909
4910                                 if (nThrows < MAX_EXC) {
4911                                         exc_classes [nThrows]     = exc_class;
4912                                         exc_throw_start [nThrows] = code;
4913                                 }
4914
4915                                 /*---------------------------------------------*/
4916                                 /* Patch the parameter passed to the handler   */
4917                                 /*---------------------------------------------*/
4918                                 s390_basr (code, s390_r13, 0);
4919                                 s390_j    (code, 4);
4920                                 s390_word (code, patch_info->data.target);
4921                                 /*---------------------------------------------*/
4922                                 /* Load return address & parameter register    */
4923                                 /*---------------------------------------------*/
4924                                 s390_larl (code, s390_r14, (gsize)S390_RELATIVE((patch_info->ip.i +
4925                                                            cfg->native_code + 8), code));
4926                                 s390_l    (code, s390_r2, 0, s390_r13, 4);
4927                                 /*---------------------------------------------*/
4928                                 /* Reuse the current patch to set the jump     */
4929                                 /*---------------------------------------------*/
4930                                 patch_info->type      = MONO_PATCH_INFO_INTERNAL_METHOD;
4931                                 patch_info->data.name = "mono_arch_throw_exception_by_name";
4932                                 patch_info->ip.i      = code - cfg->native_code;
4933                                 s390_jcl  (code, S390_CC_UN, 0);
4934                         }
4935                         break;
4936                 }
4937                 default:
4938                         /* do nothing */
4939                         break;
4940                 }
4941         }
4942
4943         cfg->code_len = code - cfg->native_code;
4944
4945         g_assert (cfg->code_len < cfg->code_size);
4946
4947 }
4948
4949 /*========================= End of Function ========================*/
4950
4951 /*------------------------------------------------------------------*/
4952 /*                                                                  */
4953 /* Name         - mono_arch_setup_jit_tls_data                      */
4954 /*                                                                  */
4955 /* Function     - Setup the JIT's Thread Level Specific Data.       */
4956 /*                                                                  */
4957 /*------------------------------------------------------------------*/
4958
4959 void
4960 mono_arch_setup_jit_tls_data (MonoJitTlsData *tls)
4961 {
4962
4963         if (!tls_offset_inited) {
4964                 tls_offset_inited = TRUE;
4965
4966 #if HAVE_KW_THREAD
4967 # if 0
4968         __asm__ ("\tear\t%r1,0\n"
4969                  "\tlr\t%0,%3\n"
4970                  "\tsr\t%0,%r1\n"
4971                  "\tlr\t%1,%4\n"
4972                  "\tsr\t%1,%r1\n"
4973                  "\tlr\t%2,%5\n"
4974                  "\tsr\t%2,%r1\n"
4975                  : "=r" (appdomain_tls_offset),
4976                    "=r" (thread_tls_offset),
4977                    "=r" (lmf_tls_offset)
4978                  : "r" (&tls_appdomain),
4979                    "r" (&tls_current_object),
4980                    "r" (&mono_lmf_addr)
4981                  : "1", "cc");
4982 # endif
4983 #endif
4984         }
4985
4986         if (!lmf_addr_key_inited) {
4987                 lmf_addr_key_inited = TRUE;
4988                 pthread_key_create (&lmf_addr_key, NULL);
4989         }
4990         pthread_setspecific (lmf_addr_key, &tls->lmf);
4991
4992 }
4993
4994 /*========================= End of Function ========================*/
4995
4996 /*------------------------------------------------------------------*/
4997 /*                                                                  */
4998 /* Name         - mono_arch_free_jit_tls_data                       */
4999 /*                                                                  */
5000 /* Function     - Free tls data.                                    */
5001 /*                                                                  */
5002 /*------------------------------------------------------------------*/
5003
5004 void
5005 mono_arch_free_jit_tls_data (MonoJitTlsData *tls)
5006 {
5007 }
5008
5009 /*========================= End of Function ========================*/
5010
5011 /*------------------------------------------------------------------*/
5012 /*                                                                  */
5013 /* Name         - mono_arch_emit_inst_for_method                        */
5014 /*                                                                  */
5015 /*------------------------------------------------------------------*/
5016
5017 MonoInst*
5018 mono_arch_emit_inst_for_method (MonoCompile *cfg, MonoMethod *cmethod, MonoMethodSignature *fsig, MonoInst **args)
5019 {
5020         return NULL;
5021 }
5022
5023 /*========================= End of Function ========================*/
5024
5025 void
5026 mono_arch_decompose_opts (MonoCompile *cfg, MonoInst *ins)
5027 {
5028         switch (ins->opcode) {
5029         case OP_ISUB_OVF:
5030                 ins->opcode = OP_S390_ISUB_OVF;
5031                 break;
5032         case OP_ISUB_OVF_UN:
5033                 ins->opcode = OP_S390_ISUB_OVF_UN;
5034                 break;
5035         case OP_IADD_OVF:
5036                 ins->opcode = OP_S390_IADD_OVF;
5037                 break;
5038         case OP_IADD_OVF_UN:
5039                 ins->opcode = OP_S390_IADD_OVF_UN;
5040                 break;
5041         default:
5042                 break;
5043         }
5044 }
5045
5046 /*========================= End of Function ========================*/
5047
5048 /*------------------------------------------------------------------*/
5049 /*                                                                  */
5050 /* Name         - mono_arch_decompose_long_opts                         */
5051 /*                                                                  */
5052 /*------------------------------------------------------------------*/
5053
5054 void
5055 mono_arch_decompose_long_opts (MonoCompile *cfg, MonoInst *ins)
5056 {
5057         // The generic code seems to work for OP_LSUB fine on s390, why is a different
5058         // implementation needed ? gcc also seems to use the different implementation.
5059         // FIXME: What about the other OP_L opcodes below ?
5060
5061         switch (ins->opcode) {
5062         case OP_LADD_OVF:
5063         case OP_LADD_OVF_UN:
5064         case OP_LSUB_OVF:
5065         case OP_LSUB_OVF_UN: {
5066                 int opcode = 0;
5067
5068                 switch (ins->opcode) {
5069                 case OP_LADD:
5070                         opcode = OP_S390_LADD;
5071                         break;
5072                 case OP_LADD_OVF:
5073                         opcode = OP_S390_LADD_OVF;
5074                         break;
5075                 case OP_LADD_OVF_UN:
5076                         opcode = OP_S390_LADD_OVF_UN;
5077                         break;
5078                 case OP_LSUB:
5079                         opcode = OP_S390_LSUB;
5080                         break;
5081                 case OP_LSUB_OVF:
5082                         opcode = OP_S390_LSUB_OVF;
5083                         break;
5084                 case OP_LSUB_OVF_UN:
5085                         opcode = OP_S390_LSUB_OVF_UN;
5086                         break;
5087                 default:
5088                         g_assert_not_reached ();
5089                 }
5090
5091                 /* These hard regs make ssa crazy */
5092                 cfg->disable_ssa = TRUE;
5093                 MONO_EMIT_NEW_UNALU (cfg, OP_MOVE, s390_r0, ins->sreg1 + 1);
5094                 MONO_EMIT_NEW_UNALU (cfg, OP_MOVE, s390_r1, ins->sreg1 + 2);
5095                 MONO_EMIT_NEW_BIALU (cfg, opcode, ins->dreg, ins->sreg2 + 1, ins->sreg2 + 2);
5096                 NULLIFY_INS (ins);
5097                 break;
5098         }
5099         case OP_LADD_IMM: {
5100                 int dreg = mono_alloc_dreg (cfg, STACK_I8);
5101                 MONO_EMIT_NEW_I8CONST (cfg, dreg, ins->inst_l);
5102                 MONO_EMIT_NEW_BIALU (cfg, OP_LADD, ins->dreg, ins->sreg1, dreg);
5103                 NULLIFY_INS (ins);
5104                 break;
5105         }
5106         case OP_LSUB_IMM: {
5107                 int dreg = mono_alloc_dreg (cfg, STACK_I8);
5108                 MONO_EMIT_NEW_I8CONST (cfg, dreg, ins->inst_l);
5109                 MONO_EMIT_NEW_BIALU (cfg, OP_LSUB, ins->dreg, ins->sreg1, dreg);
5110                 NULLIFY_INS (ins);
5111                 break;
5112         }
5113         case OP_LNEG: {
5114                 MONO_EMIT_NEW_BIALU (cfg, OP_S390_LNEG, ins->dreg, ins->sreg1 + 1, ins->sreg1 + 2);
5115                 NULLIFY_INS (ins);
5116                 break;
5117         }
5118         case OP_ISUB_OVF:
5119                 ins->opcode = OP_S390_ISUB_OVF;
5120                 break;
5121         case OP_ISUB_OVF_UN:
5122                 ins->opcode = OP_S390_ISUB_OVF_UN;
5123                 break;
5124         default:
5125                 break;
5126         }
5127 }
5128
5129 /*========================= End of Function ========================*/
5130
5131 /*------------------------------------------------------------------*/
5132 /*                                                                  */
5133 /* Name         - mono_arch_print_tree                              */
5134 /*                                                                  */
5135 /* Function     - Print platform-specific opcode details.           */
5136 /*                                                                  */
5137 /* Returns      - 1 - opcode details have been printed              */
5138 /*                0 - opcode details have not been printed          */
5139 /*                                                                  */
5140 /*------------------------------------------------------------------*/
5141
5142 gboolean
5143 mono_arch_print_tree (MonoInst *tree, int arity)
5144 {
5145         gboolean done;
5146
5147         switch (tree->opcode) {
5148                 case OP_S390_LOADARG:
5149                 case OP_S390_ARGREG:
5150                 case OP_S390_ARGPTR:
5151                         printf ("[0x%lx(%s)]", tree->inst_offset,
5152                                 mono_arch_regname (tree->inst_basereg));
5153                         done = 1;
5154                         break;
5155                 case OP_S390_STKARG:
5156                         printf ("[0x%lx(previous_frame)]",
5157                                 tree->inst_offset);
5158                         done = 1;
5159                         break;
5160                 case OP_S390_MOVE:
5161                         printf ("[0x%lx(%d,%s),0x%lx(%s)]",
5162                                 tree->inst_offset, tree->backend.size,
5163                                 mono_arch_regname(tree->dreg), tree->inst_imm,
5164                                 mono_arch_regname(tree->sreg1));
5165                         done = 1;
5166                         break;
5167                 case OP_S390_SETF4RET:
5168                         printf ("[%s,%s]",
5169                                 mono_arch_fregname (tree->dreg),
5170                                 mono_arch_fregname (tree->sreg1));
5171                         done = 1;
5172                         break;
5173                 case OP_TLS_GET:
5174                         printf ("[0x%lx(0x%lx,%s)]", tree->inst_offset,
5175                                 tree->inst_imm,
5176                                 mono_arch_regname (tree->sreg1));
5177                         done = 1;
5178                         break;
5179                 case OP_S390_BKCHAIN:
5180                         printf ("[previous_frame(%s)]",
5181                                 mono_arch_regname (tree->sreg1));
5182                         done = 1;
5183                         break;
5184                 default:
5185                         done = 0;
5186         }
5187         return (done);
5188 }
5189
5190 /*========================= End of Function ========================*/
5191
5192 /*------------------------------------------------------------------*/
5193 /*                                                                  */
5194 /* Name         - mono_arch_regalloc_cost                           */
5195 /*                                                                  */
5196 /* Function     - Determine the cost, in the number of memory       */
5197 /*                references, of the action of allocating the var-  */
5198 /*                iable VMV into a register during global register  */
5199 /*                allocation.                                       */
5200 /*                                                                  */
5201 /* Returns      - Cost                                              */
5202 /*                                                                  */
5203 /*------------------------------------------------------------------*/
5204
5205 guint32
5206 mono_arch_regalloc_cost (MonoCompile *cfg, MonoMethodVar *vmv)
5207 {
5208         /* FIXME: */
5209         return 2;
5210 }
5211
5212 /*========================= End of Function ========================*/
5213
5214 /*------------------------------------------------------------------*/
5215 /*                                                                  */
5216 /* Name         - mono_arch_get_domain_intrinsic                    */
5217 /*                                                                  */
5218 /* Function     -                                                   */
5219 /*                                                                  */
5220 /* Returns      -                                                   */
5221 /*                                                                  */
5222 /*------------------------------------------------------------------*/
5223
5224 MonoInst *
5225 mono_arch_get_domain_intrinsic (MonoCompile* cfg)
5226 {
5227         MonoInst *ins;
5228
5229         if (appdomain_tls_offset == -1)
5230                 return NULL;
5231
5232         MONO_INST_NEW (cfg, ins, OP_TLS_GET);
5233         ins->inst_offset = appdomain_tls_offset;
5234         return (ins);
5235 }
5236
5237 /*========================= End of Function ========================*/
5238
5239 /*------------------------------------------------------------------*/
5240 /*                                                                  */
5241 /* Name         - mono_arch_get_thread_intrinsic                    */
5242 /*                                                                  */
5243 /* Function     -                                                   */
5244 /*                                                                  */
5245 /* Returns      -                                                   */
5246 /*                                                                  */
5247 /*------------------------------------------------------------------*/
5248
5249 MonoInst *
5250 mono_arch_get_thread_intrinsic (MonoCompile* cfg)
5251 {
5252         MonoInst *ins;
5253
5254         if (thread_tls_offset == -1)
5255                 return NULL;
5256
5257         MONO_INST_NEW (cfg, ins, OP_TLS_GET);
5258         ins->inst_offset = thread_tls_offset;
5259         return (ins);
5260 }
5261
5262 /*========================= End of Function ========================*/
5263
5264 /*------------------------------------------------------------------*/
5265 /*                                                                  */
5266 /* Name         - mono_arch_flush_register_windows                  */
5267 /*                                                                  */
5268 /* Function     -                                                   */
5269 /*                                                                  */
5270 /* Returns      -                                                   */
5271 /*                                                                  */
5272 /*------------------------------------------------------------------*/
5273
5274 void
5275 mono_arch_flush_register_windows (void)
5276 {
5277 }
5278
5279 /*========================= End of Function ========================*/
5280
5281 /*------------------------------------------------------------------*/
5282 /*                                                                  */
5283 /* Name         - mono_arch_get_lmf_addr                            */
5284 /*                                                                  */
5285 /* Function     -                                                   */
5286 /*                                                                  */
5287 /* Returns      -                                                   */
5288 /*                                                                  */
5289 /*------------------------------------------------------------------*/
5290
5291 gpointer
5292 mono_arch_get_lmf_addr (void)
5293 {
5294         return pthread_getspecific (lmf_addr_key);
5295 }
5296
5297
5298 /*========================= End of Function ========================*/
5299
5300 /*------------------------------------------------------------------*/
5301 /*                                                                  */
5302 /* Name         - mono_arch_get_patch_offset                        */
5303 /*                                                                  */
5304 /* Function     - Dummy entry point until s390x supports aot.       */
5305 /*                                                                  */
5306 /* Returns      - Offset for patch.                                 */
5307 /*                                                                  */
5308 /*------------------------------------------------------------------*/
5309
5310 guint32
5311 mono_arch_get_patch_offset (guint8 *code)
5312 {
5313         return 0;
5314 }
5315
5316 /*========================= End of Function ========================*/
5317
5318 gpointer
5319 mono_arch_context_get_int_reg (MonoContext *ctx, int reg)
5320 {
5321         /* FIXME: implement */
5322         g_assert_not_reached ();
5323         return NULL;
5324 }