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 #include "ir-emit.h"
 269
 270 /*========================= End of Includes ========================*/
 271
 272 /*------------------------------------------------------------------*/
 273 /*                 T y p e d e f s                                  */
 274 /*------------------------------------------------------------------*/
 275
 276 typedef struct {
 277         guint stack_size,
 278               local_size,
 279               code_size,
 280               parm_size,
 281               offset,
 282               offStruct,
 283               retStruct;
 284 } size_data;
 285
 286 /*------------------------------------------------------------------*/
 287 /* Used by the instrument_emit_epilog                               */
 288 /*------------------------------------------------------------------*/
 289
 290 enum {
 291         SAVE_NONE,
 292         SAVE_STRUCT,
 293         SAVE_ONE,
 294         SAVE_TWO,
 295         SAVE_R4,
 296         SAVE_R8
 297 };
 298
 299 typedef struct InstList InstList;
 300
 301 struct InstList {
 302         InstList *prev;
 303         InstList *next;
 304         MonoInst *data;
 305 };
 306
 307 typedef enum {
 308         RegTypeGeneral,
 309         RegTypeBase,
 310         RegTypeFP,
 311         RegTypeFPR4,
 312         RegTypeStructByVal,
 313         RegTypeStructByValInFP,
 314         RegTypeStructByAddr
 315 } ArgStorage;
 316
 317 typedef struct {
 318         gint32  offset;         /* offset from caller's stack */
 319         gint32  offparm;        /* offset from callee's stack */
 320         guint16 vtsize;         /* in param area */
 321         guint8  reg;
 322         ArgStorage regtype;             /* See RegType* */
 323         guint32 size;           /* Size of structure used by RegTypeStructByVal */
 324 } ArgInfo;
 325
 326 typedef struct {
 327         int nargs;
 328         int lastgr;
 329         guint32 stack_usage;
 330         guint32 struct_ret;
 331         ArgInfo ret;
 332         ArgInfo sigCookie;
 333         size_data sz;
 334         ArgInfo args [1];
 335 } CallInfo;
 336
 337 typedef struct {
 338         gint32  gr[5];          /* R2-R6                            */
 339         gdouble fp[3];          /* F0-F2                            */
 340 } __attribute__ ((packed)) RegParm;
 341
 342 /*========================= End of Typedefs ========================*/
 343
 344 /*------------------------------------------------------------------*/
 345 /*                   P r o t o t y p e s                            */
 346 /*------------------------------------------------------------------*/
 347
 348 static void indent (int);
 349 static guint8 * backUpStackPtr(MonoCompile *, guint8 *, gint);
 350 static void decodeParm (MonoType *, void *, int);
 351 static void enter_method (MonoMethod *, RegParm *, char *);
 352 static void leave_method (MonoMethod *, ...);
 353 static gboolean is_regsize_var (MonoType *);
 354 static inline void add_general (guint *, size_data *, ArgInfo *, gboolean);
 355 static inline void add_stackParm (guint *, size_data *, ArgInfo *, gint);
 356 static inline void add_float (guint *, size_data *, ArgInfo *);
 357 static CallInfo * get_call_info (MonoCompile *, MonoMemPool *, MonoMethodSignature *, gboolean);
 358 static guchar * emit_float_to_int (MonoCompile *, guchar *, int, int, int, gboolean);
 359 gpointer mono_arch_get_lmf_addr (void);
 360 static guint8 * emit_load_volatile_registers(guint8 *, MonoCompile *);
 361 static void emit_sig_cookie (MonoCompile *, MonoCallInst *, CallInfo *, int);
 362
 363 /*========================= End of Prototypes ======================*/
 364
 365 /*------------------------------------------------------------------*/
 366 /*                 G l o b a l   V a r i a b l e s                  */
 367 /*------------------------------------------------------------------*/
 368
 369 int mono_exc_esp_offset = 0;
 370
 371 static int indent_level = 0;
 372
 373 static gboolean tls_offset_inited = FALSE;
 374
 375 static int appdomain_tls_offset = -1,
 376            thread_tls_offset = -1;
 377
 378 pthread_key_t lmf_addr_key;
 379
 380 gboolean lmf_addr_key_inited = FALSE;
 381
 382 #if 0
 383
 384 extern __thread MonoDomain *tls_appdomain;
 385 extern __thread MonoThread *tls_current_object;
 386 extern __thread gpointer   mono_lmf_addr;
 387
 388 #endif
 389
 390 /*====================== End of Global Variables ===================*/
 391
 392 /*------------------------------------------------------------------*/
 393 /*                                                                  */
 394 /* Name         - mono_arch_regname                                 */
 395 /*                                                                  */
 396 /* Function     - Returns the name of the register specified by     */
 397 /*                the input parameter.                              */
 398 /*                                                                  */
 399 /*------------------------------------------------------------------*/
 400
 401 const char*
 402 mono_arch_regname (int reg) {
 403         static const char * rnames[] = {
 404                 "s390_r0", "s390_sp", "s390_r2", "s390_r3", "s390_r4",
 405                 "s390_r5", "s390_r6", "s390_r7", "s390_r8", "s390_r9",
 406                 "s390_r10", "s390_r11", "s390_r12", "s390_r13", "s390_r14",
 407                 "s390_r15"
 408         };
 409
 410         if (reg >= 0 && reg < 16)
 411                 return rnames [reg];
 412         else
 413                 return "unknown";
 414 }
 415
 416 /*========================= End of Function ========================*/
 417
 418 /*------------------------------------------------------------------*/
 419 /*                                                                  */
 420 /* Name         - mono_arch_fregname                                */
 421 /*                                                                  */
 422 /* Function     - Returns the name of the register specified by     */
 423 /*                the input parameter.                              */
 424 /*                                                                  */
 425 /*------------------------------------------------------------------*/
 426
 427 const char*
 428 mono_arch_fregname (int reg) {
 429         static const char * rnames[] = {
 430                 "s390_f0", "s390_f1", "s390_f2", "s390_f3", "s390_f4",
 431                 "s390_f5", "s390_f6", "s390_f7", "s390_f8", "s390_f9",
 432                 "s390_f10", "s390_f11", "s390_f12", "s390_f13", "s390_f14",
 433                 "s390_f15"
 434         };
 435
 436         if (reg >= 0 && reg < 16)
 437                 return rnames [reg];
 438         else
 439                 return "unknown";
 440 }
 441
 442 /*========================= End of Function ========================*/
 443
 444 /*------------------------------------------------------------------*/
 445 /*                                                                  */
 446 /* Name         - arch_get_argument_info                            */
 447 /*                                                                  */
 448 /* Function     - Gathers information on parameters such as size,   */
 449 /*                alignment, and padding. arg_info should be large  */
 450 /*                enough to hold param_count + 1 entries.           */
 451 /*                                                                  */
 452 /* Parameters   - @csig - Method signature                          */
 453 /*                @param_count - No. of parameters to consider      */
 454 /*                @arg_info - An array to store the result info     */
 455 /*                                                                  */
 456 /* Returns      - Size of the activation frame                      */
 457 /*                                                                  */
 458 /*------------------------------------------------------------------*/
 459
 460 int
 461 mono_arch_get_argument_info (MonoMethodSignature *csig,
 462                              int param_count,
 463                              MonoJitArgumentInfo *arg_info)
 464 {
 465         int k, frame_size = 0;
 466         int size, align, pad;
 467         int offset = 8;
 468
 469         if (MONO_TYPE_ISSTRUCT (csig->ret)) {
 470                 frame_size += sizeof (gpointer);
 471                 offset += 4;
 472         }
 473
 474         arg_info [0].offset = offset;
 475
 476         if (csig->hasthis) {
 477                 frame_size += sizeof (gpointer);
 478                 offset += 4;
 479         }
 480
 481         arg_info [0].size = frame_size;
 482
 483         for (k = 0; k < param_count; k++) {
 484
 485                 if (csig->pinvoke)
 486                         size = mono_type_native_stack_size (csig->params [k], &align);
 487                 else
 488                         size = mini_type_stack_size (NULL, csig->params [k], &align);
 489
 490                 frame_size += pad = (align - (frame_size & (align - 1))) & (align - 1);
 491                 arg_info [k].pad = pad;
 492                 frame_size += size;
 493                 arg_info [k + 1].pad = 0;
 494                 arg_info [k + 1].size = size;
 495                 offset += pad;
 496                 arg_info [k + 1].offset = offset;
 497                 offset += size;
 498         }
 499
 500         align = MONO_ARCH_FRAME_ALIGNMENT;
 501         frame_size += pad = (align - (frame_size & (align - 1))) & (align - 1);
 502         arg_info [k].pad = pad;
 503
 504         return frame_size;
 505 }
 506
 507 /*========================= End of Function ========================*/
 508
 509 /*------------------------------------------------------------------*/
 510 /*                                                                  */
 511 /* Name         - retFitsInReg.                                     */
 512 /*                                                                  */
 513 /* Function     - Determines if a value can be returned in one or   */
 514 /*                two registers.                                    */
 515 /*                                                                  */
 516 /*------------------------------------------------------------------*/
 517
 518 static inline gboolean
 519 retFitsInReg(guint32 size)
 520 {
 521         switch (size) {
 522                 case 0:
 523                 case 1:
 524                 case 2:
 525                 case 4:
 526                 case 8:
 527                         return (TRUE);
 528                 break;
 529                 default:
 530                         return (FALSE);
 531         }
 532 }
 533
 534 /*========================= End of Function ========================*/
 535
 536 /*------------------------------------------------------------------*/
 537 /*                                                                  */
 538 /* Name         - backStackPtr.                                     */
 539 /*                                                                  */
 540 /* Function     - Restore Stack Pointer to previous frame.          */
 541 /*                                                                  */
 542 /*------------------------------------------------------------------*/
 543
 544 static inline guint8 *
 545 backUpStackPtr(MonoCompile *cfg, guint8 *code, gint framePtr)
 546 {
 547         int stackSize = cfg->stack_usage;
 548
 549         if (s390_is_uimm16 (cfg->stack_usage)) {
 550                 s390_ahi  (code, framePtr, cfg->stack_usage);
 551         } else {
 552                 while (stackSize > 32767) {
 553                         s390_ahi  (code, framePtr, 32767);
 554                         stackSize -= 32767;
 555                 }
 556                 s390_ahi  (code, framePtr, stackSize);
 557         }
 558         return (code);
 559 }
 560
 561 /*========================= End of Function ========================*/
 562
 563 /*------------------------------------------------------------------*/
 564 /*                                                                  */
 565 /* Name         - indent                                            */
 566 /*                                                                  */
 567 /* Function     - Perform nice indenting to current level           */
 568 /*                                                                  */
 569 /*------------------------------------------------------------------*/
 570
 571 static void
 572 indent (int diff) {
 573         int v;
 574         if (diff < 0)
 575                 indent_level += diff;
 576         v = indent_level;
 577         printf("[%3d] ",v);
 578         while (v-- > 0) {
 579                 printf (". ");
 580         }
 581         if (diff > 0)
 582                 indent_level += diff;
 583 }
 584
 585 /*========================= End of Function ========================*/
 586
 587 /*------------------------------------------------------------------*/
 588 /*                                                                  */
 589 /* Name         - decodeParm                                        */
 590 /*                                                                  */
 591 /* Function     - Decode a parameter for the trace.                 */
 592 /*                                                                  */
 593 /*------------------------------------------------------------------*/
 594
 595 static void
 596 decodeParm(MonoType *type, void *curParm, int size)
 597 {
 598         guint32 simpleType;
 599
 600         if (type->byref) {
 601                 printf("[BYREF:%p], ", *((char **) curParm));
 602         } else {
 603                 simpleType = mono_type_get_underlying_type(type)->type;
 604 enum_parmtype:
 605                 switch (simpleType) {
 606                         case MONO_TYPE_I :
 607                                 printf ("[INTPTR:%p], ", *((int **) curParm));
 608                                 break;
 609                         case MONO_TYPE_U :
 610                                 printf ("[UINTPTR:%p], ", *((int **) curParm));
 611                                 break;
 612                         case MONO_TYPE_BOOLEAN :
 613                                 printf ("[BOOL:%d], ", *((int *) curParm));
 614                                 break;
 615                         case MONO_TYPE_CHAR :
 616                                 printf ("[CHAR:%c], ", *((int *) curParm));
 617                                 break;
 618                         case MONO_TYPE_I1 :
 619                                 printf ("[INT1:%d], ", *((int *) curParm));
 620                                 break;
 621                         case MONO_TYPE_I2 :
 622                                 printf ("[INT2:%d], ", *((int *) curParm));
 623                                 break;
 624                         case MONO_TYPE_I4 :
 625                                 printf ("[INT4:%d], ", *((int *) curParm));
 626                                 break;
 627                         case MONO_TYPE_U1 :
 628                                 printf ("[UINT1:%u], ", *((unsigned int *) curParm));
 629                                 break;
 630                         case MONO_TYPE_U2 :
 631                                 printf ("[UINT2:%u], ", *((guint16 *) curParm));
 632                                 break;
 633                         case MONO_TYPE_U4 :
 634                                 printf ("[UINT4:%u], ", *((guint32 *) curParm));
 635                                 break;
 636                         case MONO_TYPE_U8 :
 637                                 printf ("[UINT8:%llu], ", *((guint64 *) curParm));
 638                                 break;
 639                         case MONO_TYPE_STRING : {
 640                                 MonoString *s = *((MonoString **) curParm);
 641                                 if (s) {
 642                                         g_assert (((MonoObject *) s)->vtable->klass == mono_defaults.string_class);
 643                                         printf("[STRING:%p:%s], ", s, mono_string_to_utf8(s));
 644                                 } else {
 645                                         printf("[STRING:null], ");
 646                                 }
 647                                 break;
 648                         }
 649                         case MONO_TYPE_CLASS :
 650                         case MONO_TYPE_OBJECT : {
 651                                 MonoObject *obj = *((MonoObject **) curParm);
 652                                 MonoClass *class;
 653                                 if ((obj) && (obj->vtable)) {
 654                                         printf("[CLASS/OBJ:");
 655                                         class = obj->vtable->klass;
 656                                         printf("%p [%p] ",obj,curParm);
 657 //                                      if (class == mono_defaults.string_class) {
 658 //                                              printf("[STRING:%p:%s]",
 659 //                                                     *obj, mono_string_to_utf8 (obj));
 660 //                                      } else if (class == mono_defaults.int32_class) {
 661 //                                              printf("[INT32:%p:%d]",
 662 //                                                      obj, *(gint32 *)((char *)obj + sizeof (MonoObject)));
 663 //                                      } else
 664 //                                              printf("[%s.%s:%p]",
 665 //                                                     class->name_space, class->name, obj);
 666                                         printf("], ");
 667                                 } else {
 668                                         printf("[OBJECT:null], ");
 669                                 }
 670                                 break;
 671                         }
 672                         case MONO_TYPE_PTR :
 673                                 printf("[PTR:%p], ", *((gpointer **) (curParm)));
 674                                 break;
 675                         case MONO_TYPE_FNPTR :
 676                                 printf("[FNPTR:%p], ", *((gpointer **) (curParm)));
 677                                 break;
 678                         case MONO_TYPE_ARRAY :
 679                                 printf("[ARRAY:%p], ", *((gpointer **) (curParm)));
 680                                 break;
 681                         case MONO_TYPE_SZARRAY :
 682                                 printf("[SZARRAY:%p], ", *((gpointer **) (curParm)));
 683                                 break;
 684                         case MONO_TYPE_I8 :
 685                                 printf("[INT8:%lld], ", *((gint64 *) (curParm)));
 686                                 break;
 687                         case MONO_TYPE_R4 :
 688                                 printf("[FLOAT4:%g], ", *((double *) (curParm)));
 689                                 break;
 690                         case MONO_TYPE_R8 :
 691                                 printf("[FLOAT8:%g], ", *((double *) (curParm)));
 692                                 break;
 693                         case MONO_TYPE_VALUETYPE : {
 694                                 int i;
 695                                 MonoMarshalType *info;
 696
 697                                 if (type->data.klass->enumtype) {
 698                                         simpleType = type->data.klass->enum_basetype->type;
 699                                         printf("{VALUETYPE} - ");
 700                                         goto enum_parmtype;
 701                                 }
 702
 703                                 info = mono_marshal_load_type_info (type->data.klass);
 704
 705                                 if ((info->native_size == sizeof(float)) &&
 706                                     (info->num_fields  == 1) &&
 707                                     (info->fields[0].field->type->type == MONO_TYPE_R4)) {
 708                                                 printf("[FLOAT4:%f], ", *((float *) (curParm)));
 709                                         break;
 710                                 }
 711
 712                                 if ((info->native_size == sizeof(double)) &&
 713                                     (info->num_fields  == 1) &&
 714                                     (info->fields[0].field->type->type == MONO_TYPE_R8)) {
 715                                         printf("[FLOAT8:%g], ", *((double *) (curParm)));
 716                                         break;
 717                                 }
 718
 719                                 printf("[VALUETYPE:");
 720                                 for (i = 0; i < size; i++)
 721                                         printf("%02x,", *((guint8 *)curParm+i));
 722                                 printf("]");
 723                                 break;
 724                         }
 725                         case MONO_TYPE_TYPEDBYREF: {
 726                                 int i;
 727                                 printf("[TYPEDBYREF:");
 728                                 for (i = 0; i < size; i++)
 729                                         printf("%02x,", *((guint8 *)curParm+i));
 730                                 printf("]");
 731                                 break;
 732                         }
 733                         default :
 734                                 printf("[?? - %d], ",simpleType);
 735                 }
 736         }
 737 }
 738
 739 /*========================= End of Function ========================*/
 740
 741 //static int lc = 0;
 742
 743 /*------------------------------------------------------------------*/
 744 /*                                                                  */
 745 /* Name         - enter_method                                      */
 746 /*                                                                  */
 747 /* Function     - Perform tracing of the entry to the current       */
 748 /*                method.                                           */
 749 /*                                                                  */
 750 /*------------------------------------------------------------------*/
 751
 752 static void
 753 enter_method (MonoMethod *method, RegParm *rParm, char *sp)
 754 {
 755         int i, oParm = 0, iParm = 0;
 756         MonoObject *obj;
 757         MonoMethodSignature *sig;
 758         char *fname;
 759         guint32 ip;
 760         CallInfo *cinfo;
 761         ArgInfo *ainfo;
 762         void *curParm;
 763
 764         fname = mono_method_full_name (method, TRUE);
 765         indent (1);
 766         printf ("ENTER: %s(", fname);
 767         g_free (fname);
 768
 769         ip  = (*(guint32 *) (sp+S390_RET_ADDR_OFFSET)) & 0x7fffffff;
 770         printf (") ip: %p sp: %p - ", (gpointer) ip, sp);
 771
 772         if (rParm == NULL)
 773                 return;
 774
 775         sig = mono_method_signature (method);
 776
 777         cinfo = get_call_info (NULL, NULL, sig, sig->pinvoke);
 778
 779         if (cinfo->struct_ret) {
 780                 printf ("[STRUCTRET:%p], ", (gpointer) rParm->gr[0]);
 781                 iParm = 1;
 782         }
 783
 784         if (sig->hasthis) {
 785                 gpointer *this = (gpointer *) rParm->gr[iParm];
 786                 obj = (MonoObject *) this;
 787                 if (method->klass->valuetype) {
 788                         if (obj) {
 789                                 printf("this:[value:%p:%08x], ",
 790                                        this, *((guint32 *)(this+sizeof(MonoObject))));
 791                         } else
 792                                 printf ("this:[NULL], ");
 793                 } else {
 794                         if (obj) {
 795 //                              class = obj->vtable->klass;
 796 //                              if (class == mono_defaults.string_class) {
 797 //                                      printf ("this:[STRING:%p:%s], ",
 798 //                                              obj, mono_string_to_utf8 ((MonoString *)obj));
 799 //                              } else {
 800 //                                      printf ("this:%p[%s.%s], ",
 801 //                                              obj, class->name_space, class->name);
 802 //                              }
 803 printf("this:%p, ",obj);
 804                         } else
 805                                 printf ("this:NULL, ");
 806                 }
 807                 oParm++;
 808         }
 809
 810         for (i = 0; i < sig->param_count; ++i) {
 811                 ainfo = &cinfo->args[i + oParm];
 812                 switch (ainfo->regtype) {
 813                         case RegTypeGeneral :
 814                                 decodeParm(sig->params[i], &(rParm->gr[ainfo->reg-2]), ainfo->size);
 815                                 break;
 816                         case RegTypeFP :
 817                                 decodeParm(sig->params[i], &(rParm->fp[ainfo->reg]), ainfo->size);
 818                                 break;
 819                         case RegTypeBase :
 820                                 decodeParm(sig->params[i], sp+ainfo->offset, ainfo->size);
 821                                 break;
 822                         case RegTypeStructByVal :
 823                                 if (ainfo->reg != STK_BASE)
 824                                         curParm = &(rParm->gr[ainfo->reg-2]);
 825                                 else
 826                                         curParm = sp+ainfo->offset;
 827
 828                                 if (retFitsInReg (ainfo->vtsize))
 829                                         decodeParm(sig->params[i],
 830                                                    curParm,
 831                                                    ainfo->size);
 832                                 else
 833                                         decodeParm(sig->params[i],
 834                                                    *((char **) curParm),
 835                                                    ainfo->vtsize);
 836                                 break;
 837                         case RegTypeStructByAddr :
 838                                 if (ainfo->reg != STK_BASE)
 839                                         curParm = &(rParm->gr[ainfo->reg-2]);
 840                                 else
 841                                         curParm = sp+ainfo->offset;
 842
 843                                 decodeParm(sig->params[i],
 844                                            *((char **) curParm),
 845                                            ainfo->vtsize);
 846                                 break;
 847
 848                         default :
 849                                 printf("???, ");
 850                 }
 851         }
 852         printf("\n");
 853         g_free(cinfo);
 854 }
 855
 856 /*========================= End of Function ========================*/
 857
 858 /*------------------------------------------------------------------*/
 859 /*                                                                  */
 860 /* Name         - leave_method                                      */
 861 /*                                                                  */
 862 /* Function     -                                                   */
 863 /*                                                                  */
 864 /*------------------------------------------------------------------*/
 865
 866 static void
 867 leave_method (MonoMethod *method, ...)
 868 {
 869         MonoType *type;
 870         char *fname;
 871         guint32 ip;
 872         va_list ap;
 873
 874         va_start(ap, method);
 875
 876         fname = mono_method_full_name (method, TRUE);
 877         indent (-1);
 878         printf ("LEAVE: %s", fname);
 879         g_free (fname);
 880
 881         type = mono_method_signature (method)->ret;
 882
 883 handle_enum:
 884         switch (type->type) {
 885         case MONO_TYPE_VOID:
 886                 break;
 887         case MONO_TYPE_BOOLEAN: {
 888                 int val = va_arg (ap, int);
 889                 if (val)
 890                         printf ("[TRUE:%d]", val);
 891                 else
 892                         printf ("[FALSE]");
 893
 894                 break;
 895         }
 896         case MONO_TYPE_CHAR: {
 897                 int val = va_arg (ap, int);
 898                 printf ("[CHAR:%d]", val);
 899                 break;
 900         }
 901         case MONO_TYPE_I1: {
 902                 int val = va_arg (ap, int);
 903                 printf ("[INT1:%d]", val);
 904                 break;
 905         }
 906         case MONO_TYPE_U1: {
 907                 int val = va_arg (ap, int);
 908                 printf ("[UINT1:%d]", val);
 909                 break;
 910         }
 911         case MONO_TYPE_I2: {
 912                 int val = va_arg (ap, int);
 913                 printf ("[INT2:%d]", val);
 914                 break;
 915         }
 916         case MONO_TYPE_U2: {
 917                 int val = va_arg (ap, int);
 918                 printf ("[UINT2:%d]", val);
 919                 break;
 920         }
 921         case MONO_TYPE_I4: {
 922                 int val = va_arg (ap, int);
 923                 printf ("[INT4:%d]", val);
 924                 break;
 925         }
 926         case MONO_TYPE_U4: {
 927                 int val = va_arg (ap, int);
 928                 printf ("[UINT4:%d]", val);
 929                 break;
 930         }
 931         case MONO_TYPE_I: {
 932                 int val = va_arg (ap, int);
 933                 printf ("[INT:%d]", val);
 934                 printf("]");
 935                 break;
 936         }
 937         case MONO_TYPE_U: {
 938                 int val = va_arg (ap, int);
 939                 printf ("[UINT:%d]", val);
 940                 printf("]");
 941                 break;
 942         }
 943         case MONO_TYPE_STRING: {
 944                 MonoString *s = va_arg (ap, MonoString *);
 945 ;
 946                 if (s) {
 947                         g_assert (((MonoObject *)s)->vtable->klass == mono_defaults.string_class);
 948                         printf ("[STRING:%p:%s]", s, mono_string_to_utf8 (s));
 949                 } else
 950                         printf ("[STRING:null], ");
 951                 break;
 952         }
 953         case MONO_TYPE_CLASS:
 954         case MONO_TYPE_OBJECT: {
 955                 MonoObject *o = va_arg (ap, MonoObject *);
 956
 957 //              if ((o) && (o->vtable)) {
 958 //                      if (o->vtable->klass == mono_defaults.boolean_class) {
 959 //                              printf ("[BOOLEAN:%p:%d]", o, *((guint8 *)o + sizeof (MonoObject)));
 960 //                      } else if  (o->vtable->klass == mono_defaults.int32_class) {
 961 //                              printf ("[INT32:%p:%d]", o, *((gint32 *)((char *)o + sizeof (MonoObject))));
 962 //                      } else if  (o->vtable->klass == mono_defaults.int64_class) {
 963 //                              printf ("[INT64:%p:%lld]", o, *((gint64 *)((char *)o + sizeof (MonoObject))));
 964 //                      } else
 965 //                              printf ("[%s.%s:%p]", o->vtable->klass->name_space, o->vtable->klass->name, o);
 966 //              } else
 967                         printf ("[OBJECT:%p]", o);
 968
 969                 break;
 970         }
 971         case MONO_TYPE_PTR:
 972         case MONO_TYPE_FNPTR:
 973         case MONO_TYPE_ARRAY:
 974         case MONO_TYPE_SZARRAY: {
 975                 gpointer p = va_arg (ap, gpointer);
 976                 printf ("[result=%p]", p);
 977                 break;
 978         }
 979         case MONO_TYPE_I8: {
 980                 gint64 l =  va_arg (ap, gint64);
 981                 printf ("[LONG:%lld]", l);
 982                 break;
 983         }
 984         case MONO_TYPE_U8: {
 985                 guint64 l =  va_arg (ap, guint64);
 986                 printf ("[ULONG:%llu]", l);
 987                 break;
 988         }
 989         case MONO_TYPE_R4: {
 990                 double f;
 991                 f = va_arg (ap, double);
 992                 printf ("[FLOAT4:%g]\n", f);
 993                 break;
 994         }
 995         case MONO_TYPE_R8: {
 996                 double f = va_arg (ap, double);
 997                 printf ("[FLOAT8:%g]\n", f);
 998                 break;
 999         }
1000         case MONO_TYPE_VALUETYPE: {
1001                 MonoMarshalType *info;
1002                 if (type->data.klass->enumtype) {
1003                         type = type->data.klass->enum_basetype;
1004                         goto handle_enum;
1005                 } else {
1006                         guint8 *p = va_arg (ap, gpointer);
1007                         int j, size, align;
1008
1009                         info = mono_marshal_load_type_info (type->data.klass);
1010
1011                         if ((info->native_size == sizeof(float)) &&
1012                             (info->num_fields  == 1) &&
1013                             (info->fields[0].field->type->type == MONO_TYPE_R4)) {
1014                                 double f = va_arg (ap, double);
1015                                 printf("[FLOAT4:%g]\n", (double) f);
1016                                 break;
1017                         }
1018
1019                         if ((info->native_size == sizeof(double)) &&
1020                             (info->num_fields  == 1) &&
1021                             (info->fields[0].field->type->type == MONO_TYPE_R8)) {
1022                                 double f = va_arg (ap, double);
1023                                 printf("[FLOAT8:%g]\n", f);
1024                                 break;
1025                         }
1026
1027                         size = mono_type_size (type, &align);
1028                         switch (size) {
1029                         case 1:
1030                         case 2:
1031                         case 4:
1032                         case 8:
1033                                 printf ("[");
1034                                 for (j = 0; p && j < size; j++)
1035                                         printf ("%02x,", p [j]);
1036                                 printf ("]\n");
1037                                 break;
1038                         default:
1039                                 printf ("[VALUERET]\n");
1040                         }
1041                 }
1042                 break;
1043         }
1044         case MONO_TYPE_TYPEDBYREF: {
1045                 guint8 *p = va_arg (ap, gpointer);
1046                 int j, size, align;
1047                 size = mono_type_size (type, &align);
1048                 switch (size) {
1049                 case 1:
1050                 case 2:
1051                 case 4:
1052                 case 8:
1053                         printf ("[");
1054                         for (j = 0; p && j < size; j++)
1055                                 printf ("%02x,", p [j]);
1056                         printf ("]\n");
1057                         break;
1058                 default:
1059                         printf ("[TYPEDBYREF]\n");
1060                 }
1061         }
1062                 break;
1063         default:
1064                 printf ("(unknown return type %x)",
1065                         mono_method_signature (method)->ret->type);
1066         }
1067
1068         ip = ((gint32) __builtin_return_address (0)) & 0x7fffffff;
1069         printf (" ip: %p\n", (gpointer) ip);
1070 }
1071
1072 /*========================= End of Function ========================*/
1073
1074 /*------------------------------------------------------------------*/
1075 /*                                                                  */
1076 /* Name         - mono_arch_cpu_init                                */
1077 /*                                                                  */
1078 /* Function     - Perform CPU specific initialization to execute    */
1079 /*                managed code.                                     */
1080 /*                                                                  */
1081 /*------------------------------------------------------------------*/
1082
1083 void
1084 mono_arch_cpu_init (void)
1085 {
1086         guint mode = 1;
1087
1088         /*--------------------------------------*/
1089         /* Set default rounding mode for FP     */
1090         /*--------------------------------------*/
1091         __asm__ ("SRNM\t%0\n\t"
1092                 : : "m" (mode));
1093 }
1094
1095 /*========================= End of Function ========================*/
1096
1097
1098 /*
1099  * Initialize architecture specific code.
1100  */
1101 void
1102 mono_arch_init (void)
1103 {
1104 }
1105
1106 /*
1107  * Cleanup architecture specific code.
1108  */
1109 void
1110 mono_arch_cleanup (void)
1111 {
1112 }
1113
1114 /*------------------------------------------------------------------*/
1115 /*                                                                  */
1116 /* Name         - mono_arch_cpu_optimizazions                       */
1117 /*                                                                  */
1118 /* Function     - Returns the optimizations supported on this CPU   */
1119 /*                                                                  */
1120 /*------------------------------------------------------------------*/
1121
1122 guint32
1123 mono_arch_cpu_optimizazions (guint32 *exclude_mask)
1124 {
1125         guint32 opts = 0;
1126
1127         /*----------------------------------------------------------*/
1128         /* no s390-specific optimizations yet                       */
1129         /*----------------------------------------------------------*/
1130         *exclude_mask = MONO_OPT_INLINE|MONO_OPT_LINEARS;
1131 //      *exclude_mask = MONO_OPT_INLINE;
1132         return opts;
1133 }
1134
1135 /*========================= End of Function ========================*/
1136
1137 /*------------------------------------------------------------------*/
1138 /*                                                                  */
1139 /* Name         -                                                   */
1140 /*                                                                  */
1141 /* Function     -                                                   */
1142 /*                                                                  */
1143 /*------------------------------------------------------------------*/
1144
1145 static gboolean
1146 is_regsize_var (MonoType *t) {
1147         if (t->byref)
1148                 return TRUE;
1149         switch (mono_type_get_underlying_type (t)->type) {
1150         case MONO_TYPE_I4:
1151         case MONO_TYPE_U4:
1152         case MONO_TYPE_I:
1153         case MONO_TYPE_U:
1154         case MONO_TYPE_PTR:
1155         case MONO_TYPE_FNPTR:
1156                 return TRUE;
1157         case MONO_TYPE_OBJECT:
1158         case MONO_TYPE_STRING:
1159         case MONO_TYPE_CLASS:
1160         case MONO_TYPE_SZARRAY:
1161         case MONO_TYPE_ARRAY:
1162                 return FALSE;
1163         case MONO_TYPE_VALUETYPE:
1164                 if (t->data.klass->enumtype)
1165                         return is_regsize_var (t->data.klass->enum_basetype);
1166                 return FALSE;
1167         }
1168         return FALSE;
1169 }
1170
1171 /*========================= End of Function ========================*/
1172
1173 /*------------------------------------------------------------------*/
1174 /*                                                                  */
1175 /* Name         - mono_arch_get_allocatable_int_vars                */
1176 /*                                                                  */
1177 /* Function     -                                                   */
1178 /*                                                                  */
1179 /*------------------------------------------------------------------*/
1180
1181 GList *
1182 mono_arch_get_allocatable_int_vars (MonoCompile *cfg)
1183 {
1184         GList *vars = NULL;
1185         int i;
1186
1187         for (i = 0; i < cfg->num_varinfo; i++) {
1188                 MonoInst *ins = cfg->varinfo [i];
1189                 MonoMethodVar *vmv = MONO_VARINFO (cfg, i);
1190
1191                 /* unused vars */
1192                 if (vmv->range.first_use.abs_pos >= vmv->range.last_use.abs_pos)
1193                         continue;
1194
1195                 if (ins->flags & (MONO_INST_VOLATILE|MONO_INST_INDIRECT) ||
1196                     (ins->opcode != OP_LOCAL && ins->opcode != OP_ARG))
1197                         continue;
1198
1199                 /* we can only allocate 32 bit values */
1200                 if (is_regsize_var (ins->inst_vtype)) {
1201                         g_assert (MONO_VARINFO (cfg, i)->reg == -1);
1202                         g_assert (i == vmv->idx);
1203                         vars = mono_varlist_insert_sorted (cfg, vars, vmv, FALSE);
1204                 }
1205         }
1206
1207         return vars;
1208 }
1209
1210 /*========================= End of Function ========================*/
1211
1212 /*------------------------------------------------------------------*/
1213 /*                                                                  */
1214 /* Name         - mono_arch_global_int_regs                         */
1215 /*                                                                  */
1216 /* Function     - Return a list of usable integer registers.        */
1217 /*                                                                  */
1218 /*------------------------------------------------------------------*/
1219
1220 GList *
1221 mono_arch_get_global_int_regs (MonoCompile *cfg)
1222 {
1223         GList *regs = NULL;
1224         MonoMethodHeader *header;
1225         int i, top = 13;
1226
1227         header = mono_method_get_header (cfg->method);
1228         if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
1229                 cfg->frame_reg = s390_r11;
1230
1231         /* FIXME: s390_r12 is reserved for bkchain_reg. Only reserve it if needed */
1232         top = 12;
1233         for (i = 8; i < top; ++i) {
1234                 if (cfg->frame_reg != i)
1235                         regs = g_list_prepend (regs, GUINT_TO_POINTER (i));
1236         }
1237
1238         return regs;
1239 }
1240
1241 /*========================= End of Function ========================*/
1242
1243 /*------------------------------------------------------------------*/
1244 /*                                                                  */
1245 /* Name         -  mono_arch_flush_icache                           */
1246 /*                                                                  */
1247 /* Function     -  Flush the CPU icache.                            */
1248 /*                                                                  */
1249 /*------------------------------------------------------------------*/
1250
1251 void
1252 mono_arch_flush_icache (guint8 *code, gint size)
1253 {
1254 }
1255
1256 /*========================= End of Function ========================*/
1257
1258 /*------------------------------------------------------------------*/
1259 /*                                                                  */
1260 /* Name         -  mono_arch_is_inst_imm                                */
1261 /*                                                                  */
1262 /*------------------------------------------------------------------*/
1263
1264 gboolean
1265 mono_arch_is_inst_imm (gint64 imm)
1266 {
1267         /* The lowering pass will take care of it */
1268         return TRUE;
1269 }
1270
1271 /*========================= End of Function ========================*/
1272
1273 /*------------------------------------------------------------------*/
1274 /*                                                                  */
1275 /* Name         - add_general                                       */
1276 /*                                                                  */
1277 /* Function     - Determine code and stack size incremements for a  */
1278 /*                parameter.                                        */
1279 /*                                                                  */
1280 /*------------------------------------------------------------------*/
1281
1282 static void inline
1283 add_general (guint *gr, size_data *sz, ArgInfo *ainfo, gboolean simple)
1284 {
1285         int disp;
1286
1287         if (simple) {
1288                 if (*gr > S390_LAST_ARG_REG) {
1289                         sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1290                         ainfo->offset   = sz->stack_size;
1291                         ainfo->reg      = STK_BASE;
1292                         ainfo->regtype  = RegTypeBase;
1293                         sz->stack_size += sizeof(int);
1294                         sz->local_size += sizeof(int);
1295                         sz->offStruct  += sizeof(int);
1296                         sz->code_size  += 12;
1297                 } else {
1298                         ainfo->reg      = *gr;
1299                         sz->code_size  += 8;
1300                 }
1301         } else {
1302                 if (*gr > S390_LAST_ARG_REG - 1) {
1303                         disp            = sz->stack_size;
1304                         sz->stack_size  = S390_ALIGN(sz->stack_size, S390_STACK_ALIGNMENT);
1305                         disp            = sz->stack_size - disp;
1306                         ainfo->offset   = sz->stack_size;
1307                         ainfo->reg      = STK_BASE;
1308                         ainfo->regtype  = RegTypeBase;
1309                         sz->stack_size += sizeof(long long);
1310                         sz->local_size += (sizeof(long long) + disp);
1311                         sz->offStruct  += (sizeof(long long) + disp);
1312                         sz->code_size  += 10;
1313                 } else {
1314                         ainfo->reg      = *gr;
1315                         sz->code_size  += 8;
1316                 }
1317                 (*gr) ++;
1318         }
1319         (*gr) ++;
1320 }
1321
1322 /*========================= End of Function ========================*/
1323
1324 /*------------------------------------------------------------------*/
1325 /*                                                                  */
1326 /* Name         - add_stackParm                                     */
1327 /*                                                                  */
1328 /* Function     - Determine code and stack size incremements for a  */
1329 /*                parameter.                                        */
1330 /*                                                                  */
1331 /*------------------------------------------------------------------*/
1332
1333 static void inline
1334 add_stackParm (guint *gr, size_data *sz, ArgInfo *ainfo, gint size)
1335 {
1336         if (*gr > S390_LAST_ARG_REG) {
1337                 sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1338                 ainfo->reg          = STK_BASE;
1339                 ainfo->offset   = sz->stack_size;
1340                 sz->stack_size += sizeof (gpointer);
1341                 sz->parm_size  += sizeof(gpointer);
1342                 sz->offStruct  += sizeof(gpointer);
1343         } else {
1344                 ainfo->reg      = *gr;
1345                 ainfo->offset   = sz->stack_size;
1346         }
1347         (*gr) ++;
1348         ainfo->offparm  = sz->offset;
1349         sz->offset      = S390_ALIGN(sz->offset+size, sizeof(long));
1350         ainfo->size     = size;
1351         ainfo->regtype  = RegTypeStructByAddr;
1352         ainfo->vtsize   = size;
1353         sz->parm_size  += size;
1354 }
1355
1356 /*========================= End of Function ========================*/
1357
1358 /*------------------------------------------------------------------*/
1359 /*                                                                  */
1360 /* Name         - add_float                                         */
1361 /*                                                                  */
1362 /* Function     - Determine code and stack size incremements for a  */
1363 /*                float parameter.                                  */
1364 /*                                                                  */
1365 /*------------------------------------------------------------------*/
1366
1367 static void inline
1368 add_float (guint *fr,  size_data *sz, ArgInfo *ainfo)
1369 {
1370         if ((*fr) <= S390_LAST_FPARG_REG) {
1371                 ainfo->regtype = RegTypeFP;
1372                 ainfo->reg     = *fr;
1373                 sz->code_size += 4;
1374                 (*fr) += 2;
1375         }
1376         else {
1377                 ainfo->offset   = sz->stack_size;
1378                 ainfo->reg      = STK_BASE;
1379                 ainfo->regtype  = RegTypeBase;
1380                 sz->code_size  += 4;
1381                 sz->stack_size += ainfo->size;
1382                 sz->local_size += ainfo->size;
1383                 sz->offStruct  += ainfo->size;
1384         }
1385 }
1386
1387 /*========================= End of Function ========================*/
1388
1389 /*------------------------------------------------------------------*/
1390 /*                                                                  */
1391 /* Name         - get_call_info                                         */
1392 /*                                                                  */
1393 /* Function     - Determine the amount of space required for code   */
1394 /*                and stack. In addition determine starting points  */
1395 /*                for stack-based parameters, and area for struct-  */
1396 /*                ures being returned on the stack.                 */
1397 /*                                                                  */
1398 /*------------------------------------------------------------------*/
1399
1400 static CallInfo *
1401 get_call_info (MonoCompile *cfg, MonoMemPool *mp, MonoMethodSignature *sig, gboolean is_pinvoke)
1402 {
1403         guint i, fr, gr, size;
1404         int nParm = sig->hasthis + sig->param_count;
1405         MonoType *ret_type;
1406         guint32 simpletype, align;
1407         CallInfo *cinfo;
1408         size_data *sz;
1409         MonoGenericSharingContext *gsctx = cfg ? cfg->generic_sharing_context : NULL;
1410
1411         if (mp)
1412                 cinfo = mono_mempool_alloc0 (mp, sizeof (CallInfo) + sizeof (ArgInfo) * nParm);
1413         else
1414                 cinfo = g_malloc0 (sizeof (CallInfo) + sizeof (ArgInfo) * nParm);
1415
1416         fr                = 0;
1417         gr                = s390_r2;
1418         nParm                 = 0;
1419         cinfo->struct_ret = 0;
1420         sz                = &cinfo->sz;
1421         sz->offset            = 0;
1422         sz->offStruct     = S390_MINIMAL_STACK_SIZE;
1423         sz->retStruct     = 0;
1424         sz->stack_size    = S390_MINIMAL_STACK_SIZE;
1425         sz->code_size     = 0;
1426         sz->parm_size     = 0;
1427         sz->local_size    = 0;
1428
1429         /*----------------------------------------------------------*/
1430         /* We determine the size of the return code/stack in case we*/
1431         /* need to reserve a register to be used to address a stack */
1432         /* area that the callee will use.                           */
1433         /*----------------------------------------------------------*/
1434
1435         ret_type = mono_type_get_underlying_type (sig->ret);
1436         ret_type = mini_get_basic_type_from_generic (gsctx, ret_type);
1437         simpletype = ret_type->type;
1438 enum_retvalue:
1439         switch (simpletype) {
1440                 case MONO_TYPE_BOOLEAN:
1441                 case MONO_TYPE_I1:
1442                 case MONO_TYPE_U1:
1443                 case MONO_TYPE_I2:
1444                 case MONO_TYPE_U2:
1445                 case MONO_TYPE_CHAR:
1446                 case MONO_TYPE_I4:
1447                 case MONO_TYPE_U4:
1448                 case MONO_TYPE_I:
1449                 case MONO_TYPE_U:
1450                 case MONO_TYPE_CLASS:
1451                 case MONO_TYPE_OBJECT:
1452                 case MONO_TYPE_SZARRAY:
1453                 case MONO_TYPE_ARRAY:
1454                 case MONO_TYPE_PTR:
1455                 case MONO_TYPE_FNPTR:
1456                 case MONO_TYPE_STRING:
1457                         cinfo->ret.reg = s390_r2;
1458                         sz->code_size += 4;
1459                         break;
1460                 case MONO_TYPE_R4:
1461                 case MONO_TYPE_R8:
1462                         cinfo->ret.reg = s390_f0;
1463                         sz->code_size += 4;
1464                         break;
1465                 case MONO_TYPE_I8:
1466                 case MONO_TYPE_U8:
1467                         cinfo->ret.reg = s390_r2;
1468                         sz->code_size += 4;
1469                         break;
1470                 case MONO_TYPE_GENERICINST:
1471                         if (!mono_type_generic_inst_is_valuetype (sig->ret)) {
1472                                 cinfo->ret.reg = s390_r2;
1473                                 sz->code_size += 4;
1474                                 break;
1475                         }
1476                         /* Fall through */
1477                 case MONO_TYPE_VALUETYPE: {
1478                         MonoClass *klass = mono_class_from_mono_type (sig->ret);
1479                         if (klass->enumtype) {
1480                                 simpletype = klass->enum_basetype->type;
1481                                 goto enum_retvalue;
1482                         }
1483                         if (sig->pinvoke)
1484                                 size = mono_class_native_size (klass, &align);
1485                         else
1486                                 size = mono_class_value_size (klass, &align);
1487
1488                         cinfo->ret.reg    = s390_r2;
1489                         cinfo->struct_ret = 1;
1490                         cinfo->ret.size   = size;
1491                         cinfo->ret.vtsize = size;
1492                         gr++;
1493                         break;
1494                 }
1495                 case MONO_TYPE_TYPEDBYREF:
1496                         size = sizeof (MonoTypedRef);
1497                         cinfo->ret.reg    = s390_r2;
1498                         cinfo->struct_ret = 1;
1499                         cinfo->ret.size   = size;
1500                         cinfo->ret.vtsize = size;
1501                         gr++;
1502                         break;
1503                 case MONO_TYPE_VOID:
1504                         break;
1505                 default:
1506                         g_error ("mini-s390: cannot handle as return value 0x%x (0x%x)", sig->ret->type,simpletype);
1507         }
1508
1509         if (sig->hasthis) {
1510                 add_general (&gr, sz, cinfo->args+nParm, TRUE);
1511                 cinfo->args[nParm].size = sizeof(gpointer);
1512                 nParm++;
1513         }
1514
1515         /*----------------------------------------------------------*/
1516         /* We determine the size of the parameter code and stack    */
1517         /* requirements by checking the types and sizes of the      */
1518         /* parameters.                                              */
1519         /*----------------------------------------------------------*/
1520
1521         for (i = 0; i < sig->param_count; ++i) {
1522                 MonoType *ptype;
1523
1524                 /*--------------------------------------------------*/
1525                 /* Handle vararg type calls. All args are put on    */
1526                 /* the stack.                                       */
1527                 /*--------------------------------------------------*/
1528                 if ((sig->call_convention == MONO_CALL_VARARG) &&
1529                     (i == sig->sentinelpos)) {
1530                         gr = S390_LAST_ARG_REG + 1;
1531                         add_general (&gr, sz, &cinfo->sigCookie, TRUE);
1532                 }
1533
1534                 if (sig->params [i]->byref) {
1535                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1536                         cinfo->args[nParm].size = sizeof(gpointer);
1537                         nParm++;
1538                         continue;
1539                 }
1540
1541                 ptype = mono_type_get_underlying_type (sig->params [i]);
1542                 ptype = mini_get_basic_type_from_generic (gsctx, ptype);
1543                 simpletype = ptype->type;
1544                 switch (simpletype) {
1545                 case MONO_TYPE_BOOLEAN:
1546                 case MONO_TYPE_I1:
1547                 case MONO_TYPE_U1:
1548                         cinfo->args[nParm].size = sizeof(char);
1549                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1550                         nParm++;
1551                         break;
1552                 case MONO_TYPE_I2:
1553                 case MONO_TYPE_U2:
1554                 case MONO_TYPE_CHAR:
1555                         cinfo->args[nParm].size = sizeof(short);
1556                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1557                         nParm++;
1558                         break;
1559                 case MONO_TYPE_I4:
1560                 case MONO_TYPE_U4:
1561                         cinfo->args[nParm].size = sizeof(int);
1562                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1563                         nParm++;
1564                         break;
1565                 case MONO_TYPE_I:
1566                 case MONO_TYPE_U:
1567                 case MONO_TYPE_PTR:
1568                 case MONO_TYPE_FNPTR:
1569                 case MONO_TYPE_CLASS:
1570                 case MONO_TYPE_OBJECT:
1571                 case MONO_TYPE_STRING:
1572                 case MONO_TYPE_SZARRAY:
1573                 case MONO_TYPE_ARRAY:
1574                         cinfo->args[nParm].size = sizeof(gpointer);
1575                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1576                         nParm++;
1577                         break;
1578                 case MONO_TYPE_I8:
1579                 case MONO_TYPE_U8:
1580                         cinfo->args[nParm].size = sizeof(long long);
1581                         add_general (&gr, sz, cinfo->args+nParm, FALSE);
1582                         nParm++;
1583                         break;
1584                 case MONO_TYPE_R4:
1585                         cinfo->args[nParm].size = sizeof(float);
1586                         add_float (&fr, sz, cinfo->args+nParm);
1587                         nParm++;
1588                         break;
1589                 case MONO_TYPE_R8:
1590                         cinfo->args[nParm].size = sizeof(double);
1591                         add_float (&fr, sz, cinfo->args+nParm);
1592                         nParm++;
1593                         break;
1594                 case MONO_TYPE_GENERICINST:
1595                         if (!mono_type_generic_inst_is_valuetype (sig->params [i])) {
1596                                 cinfo->args[nParm].size = sizeof(gpointer);
1597                                 add_general (&gr, sz, cinfo->args+nParm, TRUE);
1598                                 nParm++;
1599                                 break;
1600                         }
1601                         /* Fall through */
1602                 case MONO_TYPE_VALUETYPE: {
1603                         MonoMarshalType *info;
1604                         MonoClass *klass = mono_class_from_mono_type (sig->params [i]);
1605                         if (sig->pinvoke)
1606                                 size = mono_class_native_size (klass, &align);
1607                         else
1608                                 size = mono_class_value_size (klass, &align);
1609
1610                         info = mono_marshal_load_type_info (klass);
1611
1612                         if ((info->native_size == sizeof(float)) &&
1613                             (info->num_fields  == 1) &&
1614                             (info->fields[0].field->type->type == MONO_TYPE_R4)) {
1615                                 cinfo->args[nParm].size = sizeof(float);
1616                                 add_float(&fr, sz, cinfo->args+nParm);
1617                                 nParm ++;
1618                                 break;
1619                         }
1620
1621                         if ((info->native_size == sizeof(double)) &&
1622                             (info->num_fields  == 1) &&
1623                             (info->fields[0].field->type->type == MONO_TYPE_R8)) {
1624                                 cinfo->args[nParm].size = sizeof(double);
1625                                 add_float(&fr, sz, cinfo->args+nParm);
1626                                 nParm ++;
1627                                 break;
1628                         }
1629
1630                         cinfo->args[nParm].vtsize  = 0;
1631                         cinfo->args[nParm].size    = 0;
1632
1633                         switch (size) {
1634                                 /*----------------------------------*/
1635                                 /* On S/390, structures of size 1,  */
1636                                 /* 2, 4, and 8 bytes are passed in  */
1637                                 /* (a) register(s).                 */
1638                                 /*----------------------------------*/
1639                                 case 0:
1640                                 case 1:
1641                                 case 2:
1642                                 case 4:
1643                                         add_general(&gr, sz, cinfo->args+nParm, TRUE);
1644                                         cinfo->args[nParm].size    = size;
1645                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1646                                         nParm++;
1647                                         sz->local_size            += sizeof(long);
1648                                         break;
1649                                 case 8:
1650                                         add_general(&gr, sz, cinfo->args+nParm, FALSE);
1651                                         cinfo->args[nParm].size    = sizeof(long long);
1652                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1653                                         nParm++;
1654                                         sz->local_size            += sizeof(long long);
1655                                         break;
1656                                 default:
1657                                         add_stackParm(&gr, sz, cinfo->args+nParm, size);
1658                                         nParm++;
1659                         }
1660                 }
1661                         break;
1662                 case MONO_TYPE_TYPEDBYREF: {
1663                         int size = sizeof (MonoTypedRef);
1664
1665                         cinfo->args[nParm].vtsize  = 0;
1666                         cinfo->args[nParm].size    = 0;
1667
1668                         switch (size) {
1669                                 /*----------------------------------*/
1670                                 /* On S/390, structures of size 1,  */
1671                                 /* 2, 4, and 8 bytes are passed in  */
1672                                 /* (a) register(s).                 */
1673                                 /*----------------------------------*/
1674                                 case 0:
1675                                 case 1:
1676                                 case 2:
1677                                 case 4:
1678                                         add_general(&gr, sz, cinfo->args+nParm, TRUE);
1679                                         cinfo->args[nParm].size    = size;
1680                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1681                                         nParm++;
1682                                         sz->local_size            += sizeof(long);
1683                                         break;
1684                                 case 8:
1685                                         add_general(&gr, sz, cinfo->args+nParm, FALSE);
1686                                         cinfo->args[nParm].size    = sizeof(long long);
1687                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1688                                         nParm++;
1689                                         sz->local_size            += sizeof(long long);
1690                                         break;
1691                                 default:
1692                                         add_stackParm(&gr, sz, cinfo->args+nParm, size);
1693                                         nParm++;
1694                         }
1695                 }
1696                         break;
1697                 default:
1698                         g_error ("Can't trampoline 0x%x", sig->params [i]->type);
1699                 }
1700         }
1701
1702         /*----------------------------------------------------------*/
1703         /* If we are passing a structure back then if it won't be   */
1704         /* in a register(s) then we make room at the end of the     */
1705         /* parameters that may have been placed on the stack        */
1706         /*----------------------------------------------------------*/
1707         if (cinfo->struct_ret) {
1708                 cinfo->ret.offset = sz->stack_size;
1709                 switch (cinfo->ret.size) {
1710                 case 0:
1711                 case 1:
1712                 case 2:
1713                 case 4:
1714                 case 8:
1715                         break;
1716                 default:
1717                         sz->stack_size   += S390_ALIGN(cinfo->ret.size, align);
1718                 }
1719         }
1720
1721         /*----------------------------------------------------------*/
1722         /* Handle the case where there are no implicit arguments    */
1723         /*----------------------------------------------------------*/
1724         if ((sig->call_convention == MONO_CALL_VARARG) &&
1725             (sig->param_count == sig->sentinelpos)) {
1726                 gr = S390_LAST_ARG_REG + 1;
1727                 add_general (&gr, sz, &cinfo->sigCookie, TRUE);
1728         }
1729
1730         cinfo->lastgr   = gr;
1731         sz->stack_size  = sz->stack_size + sz->local_size + sz->parm_size +
1732                           sz->offset;
1733         sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1734
1735         return (cinfo);
1736 }
1737
1738 /*========================= End of Function ========================*/
1739
1740 /*------------------------------------------------------------------*/
1741 /*                                                                  */
1742 /* Name         - mono_arch_allocate_vars                           */
1743 /*                                                                  */
1744 /* Function     - Set var information according to the calling      */
1745 /*                convention for S/390. The local var stuff should  */
1746 /*                most likely be split in another method.           */
1747 /*                                                                  */
1748 /* Parameter    - @m - Compile unit.                                */
1749 /*                                                                  */
1750 /*------------------------------------------------------------------*/
1751
1752 void
1753 mono_arch_allocate_vars (MonoCompile *cfg)
1754 {
1755         MonoMethodSignature *sig;
1756         MonoMethodHeader *header;
1757         MonoInst *inst;
1758         CallInfo *cinfo;
1759         int iParm, iVar, offset, size, align, curinst;
1760         int frame_reg = STK_BASE;
1761         int sArg, eArg;
1762
1763         header  = mono_method_get_header (cfg->method);
1764
1765         cfg->flags |= MONO_CFG_HAS_SPILLUP;
1766
1767         sig     = mono_method_signature (cfg->method);
1768
1769         cinfo   = get_call_info (cfg, cfg->mempool, sig, sig->pinvoke);
1770
1771         /*---------------------------------------------------------*/
1772         /* We use the frame register also for any method that has  */
1773         /* filter clauses. This way, when the handlers are called, */
1774         /* the code will reference local variables using the frame */
1775         /* reg instead of the stack pointer: if we had to restore  */
1776         /* the stack pointer, we'd corrupt the method frames that  */
1777         /* are already on the stack (since filters get called      */
1778         /* before stack unwinding happens) when the filter code    */
1779         /* would call any method.                                  */
1780         /*---------------------------------------------------------*/
1781         if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
1782                 frame_reg = s390_r11;
1783
1784         cfg->frame_reg = frame_reg;
1785
1786         cfg->arch.bkchain_reg = -1;
1787
1788         if (frame_reg != STK_BASE)
1789                 cfg->used_int_regs |= 1 << frame_reg;
1790
1791         sig     = mono_method_signature (cfg->method);
1792
1793         cinfo   = get_call_info (cfg, cfg->mempool, sig, sig->pinvoke);
1794
1795         if (!cinfo->struct_ret) {
1796                 switch (mono_type_get_underlying_type (sig->ret)->type) {
1797                 case MONO_TYPE_VOID:
1798                         break;
1799                 default:
1800                         cfg->ret->opcode = OP_REGVAR;
1801                         cfg->ret->dreg   = s390_r2;
1802                         break;
1803                 }
1804         }
1805
1806         /*--------------------------------------------------------------*/
1807         /* local vars are at a positive offset from the stack pointer   */
1808         /* also note that if the function uses alloca, we use s390_r11  */
1809         /* to point at the local variables.                             */
1810         /* add parameter area size for called functions                 */
1811         /*--------------------------------------------------------------*/
1812         offset          = (cfg->param_area + S390_MINIMAL_STACK_SIZE);
1813         cfg->sig_cookie = 0;
1814
1815         if (cinfo->struct_ret) {
1816                 inst               = cfg->vret_addr;
1817                 offset             = S390_ALIGN(offset, sizeof(gpointer));
1818                 inst->inst_offset  = offset;
1819                 inst->opcode       = OP_REGOFFSET;
1820                 inst->inst_basereg = frame_reg;
1821                 offset            += sizeof(gpointer);
1822                 if (G_UNLIKELY (cfg->verbose_level > 1)) {
1823                         printf ("vret_addr =");
1824                         mono_print_ins (cfg->vret_addr);
1825                 }
1826         }
1827
1828         if (sig->hasthis) {
1829                 inst = cfg->args [0];
1830                 if (inst->opcode != OP_REGVAR) {
1831                         inst->opcode       = OP_REGOFFSET;
1832                         inst->inst_basereg = frame_reg;
1833                         offset             = S390_ALIGN(offset, sizeof(gpointer));
1834                         inst->inst_offset  = offset;
1835                         offset            += sizeof (gpointer);
1836                 }
1837                 curinst = sArg = 1;
1838         } else {
1839                 curinst = sArg = 0;
1840         }
1841
1842         eArg = sig->param_count + sArg;
1843
1844         if (sig->call_convention == MONO_CALL_VARARG)
1845                 cfg->sig_cookie += S390_MINIMAL_STACK_SIZE;
1846
1847         for (iParm = sArg; iParm < eArg; ++iParm) {
1848                 inst = cfg->args [curinst];
1849                 if (inst->opcode != OP_REGVAR) {
1850                         switch (cinfo->args[iParm].regtype) {
1851                             case RegTypeStructByAddr : {
1852                                         MonoInst *indir;
1853
1854                                         size = sizeof (gpointer);
1855
1856                                         if (cinfo->args [iParm].reg == STK_BASE) {
1857                                                 cfg->arch.bkchain_reg = s390_r12;
1858                                                 cfg->used_int_regs |= 1 << cfg->arch.bkchain_reg;
1859
1860                                                 inst->opcode       = OP_REGOFFSET;
1861                                                 inst->inst_basereg = cfg->arch.bkchain_reg;
1862                                                 inst->inst_offset  = cinfo->args [iParm].offset;
1863                                         } else {
1864                                                 inst->opcode = OP_REGOFFSET;
1865                                                 inst->inst_basereg = frame_reg;
1866                                                 inst->inst_offset = S390_ALIGN(offset, sizeof (gpointer));
1867                                         }
1868
1869                                         /* Add a level of indirection */
1870                                         MONO_INST_NEW (cfg, indir, 0);
1871                                         *indir = *inst;
1872                                         inst->opcode = OP_VTARG_ADDR;
1873                                         inst->inst_left = indir;
1874                                 }
1875                                         break;
1876                                 case RegTypeStructByVal :
1877                                         size               = cinfo->args[iParm].size;
1878                                         offset             = S390_ALIGN(offset, size);
1879                                         inst->opcode = OP_REGOFFSET;
1880                                         inst->inst_basereg = frame_reg;
1881                                         inst->inst_offset = S390_ALIGN (offset, size);
1882                                         break;
1883                                 default :
1884                                         if (cinfo->args [iParm].reg == STK_BASE) {
1885                                                 /*
1886                                                  * These arguments are in the previous frame, so we can't
1887                                                  * compute their offset from the current frame pointer right
1888                                                  * now, since cfg->stack_offset is not yet known, so dedicate a
1889                                                  * register holding the previous frame pointer.
1890                                                  */
1891                                                 cfg->arch.bkchain_reg = s390_r12;
1892                                                 cfg->used_int_regs |= 1 << cfg->arch.bkchain_reg;
1893
1894                                                 inst->opcode       = OP_REGOFFSET;
1895                                                 inst->inst_basereg = cfg->arch.bkchain_reg;
1896                                                 size               = (cinfo->args[iParm].size < 4
1897                                                                                   ? 4 - cinfo->args[iParm].size
1898                                                                                   : 0);
1899                                                 inst->inst_offset  = cinfo->args [iParm].offset + size;
1900                                                 size = sizeof (long);
1901                                         } else {
1902                                                 inst->opcode       = OP_REGOFFSET;
1903                                                 inst->inst_basereg = frame_reg;
1904                                                 size               = (cinfo->args[iParm].size < 8
1905                                                                                   ? sizeof(long)
1906                                                                                   : sizeof(long long));
1907                                                 offset             = S390_ALIGN(offset, size);
1908                                                 inst->inst_offset  = offset;
1909                                         }
1910                         }
1911                         if ((sig->call_convention == MONO_CALL_VARARG) &&
1912                             (cinfo->args[iParm].regtype != RegTypeGeneral) &&
1913                             (iParm < sig->sentinelpos))
1914                                 cfg->sig_cookie += size;
1915
1916                         offset += size;
1917                 }
1918                 curinst++;
1919         }
1920
1921         curinst = cfg->locals_start;
1922         for (iVar = curinst; iVar < cfg->num_varinfo; ++iVar) {
1923                 inst = cfg->varinfo [iVar];
1924                 if ((inst->flags & MONO_INST_IS_DEAD) ||
1925                     (inst->opcode == OP_REGVAR))
1926                         continue;
1927
1928                 /*--------------------------------------------------*/
1929                 /* inst->backend.is_pinvoke indicates native sized value types, */
1930                 /* this is used by the pinvoke wrappers when they   */
1931                 /* call functions returning structure               */
1932                 /*--------------------------------------------------*/
1933                 if (inst->backend.is_pinvoke && MONO_TYPE_ISSTRUCT (inst->inst_vtype))
1934                         size = mono_class_native_size (mono_class_from_mono_type(inst->inst_vtype), &align);
1935                 else
1936                         size = mono_type_size (inst->inst_vtype, &align);
1937
1938                 offset             = S390_ALIGN(offset, align);
1939                 inst->inst_offset  = offset;
1940                 inst->opcode       = OP_REGOFFSET;
1941                 inst->inst_basereg = frame_reg;
1942                 offset            += size;
1943                 DEBUG (g_print("allocating local %d to %ld\n", iVar, inst->inst_offset));
1944         }
1945
1946         /*------------------------------------------------------*/
1947         /* Allow space for the trace method stack area if needed*/
1948         /*------------------------------------------------------*/
1949         if (mono_jit_trace_calls != NULL && mono_trace_eval (cfg->method)) {
1950                 offset += S390_TRACE_STACK_SIZE;
1951         }
1952
1953         /*------------------------------------------------------*/
1954         /* Reserve space to save LMF and caller saved registers */
1955         /*------------------------------------------------------*/
1956         if (cfg->method->save_lmf)
1957                 offset += sizeof (MonoLMF);
1958
1959         /*------------------------------------------------------*/
1960         /* align the offset                                     */
1961         /*------------------------------------------------------*/
1962         cfg->stack_offset = S390_ALIGN(offset, S390_STACK_ALIGNMENT);
1963
1964         /* Fix up offsets for arguments whose value is in the parent frame */
1965         for (iParm = sArg; iParm < eArg; ++iParm) {
1966                 inst = cfg->args [iParm];
1967
1968                 if (inst->opcode == OP_S390_STKARG) {
1969                         inst->opcode = OP_REGOFFSET;
1970                         inst->inst_offset += cfg->stack_offset;
1971                 }
1972         }
1973 }
1974
1975 /*========================= End of Function ========================*/
1976
1977 /*------------------------------------------------------------------*/
1978 /*                                                                  */
1979 /* Name         - mono_arch_create_vars                                 */
1980 /*                                                                  */
1981 /*------------------------------------------------------------------*/
1982
1983 void
1984 mono_arch_create_vars (MonoCompile *cfg)
1985 {
1986         MonoMethodSignature *sig;
1987         CallInfo *cinfo;
1988
1989         sig = mono_method_signature (cfg->method);
1990
1991         cinfo = get_call_info (cfg, cfg->mempool, sig, sig->pinvoke);
1992
1993         if (cinfo->struct_ret) {
1994                 cfg->vret_addr = mono_compile_create_var (cfg, &mono_defaults.int_class->byval_arg, OP_ARG);
1995                 if (G_UNLIKELY (cfg->verbose_level > 1)) {
1996                         printf ("vret_addr = ");
1997                         mono_print_ins (cfg->vret_addr);
1998                 }
1999         }
2000 }
2001
2002 /*========================= End of Function ========================*/
2003
2004 static void
2005 add_outarg_reg2 (MonoCompile *cfg, MonoCallInst *call, ArgStorage storage, int reg, MonoInst *tree)
2006 {
2007         MonoInst *ins;
2008
2009         switch (storage) {
2010         case RegTypeGeneral:
2011                 MONO_INST_NEW (cfg, ins, OP_MOVE);
2012                 ins->dreg = mono_alloc_ireg (cfg);
2013                 ins->sreg1 = tree->dreg;
2014                 MONO_ADD_INS (cfg->cbb, ins);
2015                 mono_call_inst_add_outarg_reg (cfg, call, ins->dreg, reg, FALSE);
2016                 break;
2017         case RegTypeFP:
2018                 MONO_INST_NEW (cfg, ins, OP_FMOVE);
2019                 ins->dreg = mono_alloc_freg (cfg);
2020                 ins->sreg1 = tree->dreg;
2021                 MONO_ADD_INS (cfg->cbb, ins);
2022                 mono_call_inst_add_outarg_reg (cfg, call, ins->dreg, reg, TRUE);
2023                 break;
2024         case RegTypeFPR4:
2025                 MONO_INST_NEW (cfg, ins, OP_S390_SETF4RET);
2026                 ins->dreg = mono_alloc_freg (cfg);
2027                 ins->sreg1 = tree->dreg;
2028                 MONO_ADD_INS (cfg->cbb, ins);
2029                 mono_call_inst_add_outarg_reg (cfg, call, ins->dreg, reg, TRUE);
2030                 break;
2031         default:
2032                 g_assert_not_reached ();
2033         }
2034 }
2035
2036 static void
2037 emit_sig_cookie (MonoCompile *cfg, MonoCallInst *call, CallInfo *cinfo)
2038 {
2039         MonoMethodSignature *tmpSig;
2040         MonoInst *sig_arg;
2041
2042         cfg->disable_aot = TRUE;
2043
2044         /*----------------------------------------------------------*/
2045         /* mono_ArgIterator_Setup assumes the signature cookie is   */
2046         /* passed first and all the arguments which were before it  */
2047         /* passed on the stack after the signature. So compensate   */
2048         /* by passing a different signature.                        */
2049         /*----------------------------------------------------------*/
2050         tmpSig = mono_metadata_signature_dup (call->signature);
2051         tmpSig->param_count -= call->signature->sentinelpos;
2052         tmpSig->sentinelpos  = 0;
2053         if (tmpSig->param_count > 0)
2054                 memcpy (tmpSig->params,
2055                         call->signature->params + call->signature->sentinelpos,
2056                         tmpSig->param_count * sizeof(MonoType *));
2057
2058         MONO_INST_NEW (cfg, sig_arg, OP_ICONST);
2059         sig_arg->dreg = mono_alloc_ireg (cfg);
2060         sig_arg->inst_p0 = tmpSig;
2061         MONO_ADD_INS (cfg->cbb, sig_arg);
2062
2063         MONO_EMIT_NEW_STORE_MEMBASE (cfg, OP_STORE_MEMBASE_REG, STK_BASE,
2064                                                                  cinfo->sigCookie.offset, sig_arg->dreg);
2065 }
2066
2067 /*------------------------------------------------------------------*/
2068 /*                                                                  */
2069 /* Name         - mono_arch_emit_call                                   */
2070 /*                                                                  */
2071 /*------------------------------------------------------------------*/
2072
2073 void
2074 mono_arch_emit_call (MonoCompile *cfg, MonoCallInst *call)
2075 {
2076         MonoInst *in;
2077         MonoMethodSignature *sig;
2078         MonoInst *ins;
2079         int i, n, lParamArea;
2080         CallInfo *cinfo;
2081         ArgInfo *ainfo = NULL;
2082         int stackSize;
2083
2084         sig = call->signature;
2085         n = sig->param_count + sig->hasthis;
2086         DEBUG (g_print ("Call requires: %d parameters\n",n));
2087
2088         cinfo = get_call_info (cfg, cfg->mempool, sig, sig->pinvoke);
2089
2090         stackSize         = cinfo->sz.stack_size + cinfo->sz.local_size + cinfo->sz.parm_size + cinfo->sz.offset;
2091         call->stack_usage = MAX(stackSize, call->stack_usage);
2092         lParamArea        = MAX((call->stack_usage-S390_MINIMAL_STACK_SIZE-cinfo->sz.parm_size), 0);
2093         cfg->param_area   = MAX(((signed) cfg->param_area), lParamArea);
2094         cfg->flags       |= MONO_CFG_HAS_CALLS;
2095
2096         if (cinfo->struct_ret) {
2097                 MONO_INST_NEW (cfg, ins, OP_MOVE);
2098                 ins->sreg1 = call->vret_var->dreg;
2099                 ins->dreg = mono_alloc_preg (cfg);
2100                 MONO_ADD_INS (cfg->cbb, ins);
2101                 mono_call_inst_add_outarg_reg (cfg, call, ins->dreg, cinfo->ret.reg, FALSE);
2102         }
2103
2104         for (i = 0; i < n; ++i) {
2105                 ainfo = cinfo->args + i;
2106                 MonoType *t;
2107
2108                 if (i >= sig->hasthis)
2109                         t = sig->params [i - sig->hasthis];
2110                 else
2111                         t = &mono_defaults.int_class->byval_arg;
2112                 t = mono_type_get_underlying_type (t);
2113
2114                 in = call->args [i];
2115
2116                 if ((sig->call_convention == MONO_CALL_VARARG) &&
2117                     (i == sig->sentinelpos)) {
2118                         emit_sig_cookie (cfg, call, cinfo);
2119                 }
2120
2121                 switch (ainfo->regtype) {
2122                 case RegTypeGeneral:
2123                         if (!t->byref && (t->type == MONO_TYPE_I8 || t->type == MONO_TYPE_U8)) {
2124                                 MONO_INST_NEW (cfg, ins, OP_MOVE);
2125                                 ins->dreg = mono_alloc_ireg (cfg);
2126                                 ins->sreg1 = in->dreg + 2;
2127                                 MONO_ADD_INS (cfg->cbb, ins);
2128                                 mono_call_inst_add_outarg_reg (cfg, call, ins->dreg, ainfo->reg, FALSE);
2129                                 MONO_INST_NEW (cfg, ins, OP_MOVE);
2130                                 ins->dreg = mono_alloc_ireg (cfg);
2131                                 ins->sreg1 = in->dreg + 1;
2132                                 MONO_ADD_INS (cfg->cbb, ins);
2133                                 mono_call_inst_add_outarg_reg (cfg, call, ins->dreg, ainfo->reg + 1, FALSE);
2134                         } else {
2135                                 add_outarg_reg2 (cfg, call, ainfo->regtype, ainfo->reg, in);
2136                         }
2137                         break;
2138                 case RegTypeFP:
2139                         if (MONO_TYPE_ISSTRUCT (t)) {
2140                                 /* Valuetype passed in one fp register */
2141                                 ainfo->regtype = RegTypeStructByValInFP;
2142                                 /* Fall through */
2143                         } else {
2144                                 if (ainfo->size == 4)
2145                                         ainfo->regtype = RegTypeFPR4;
2146                                 add_outarg_reg2 (cfg, call, ainfo->regtype, ainfo->reg, in);
2147                                 break;
2148                         }
2149                 case RegTypeStructByVal:
2150                 case RegTypeStructByAddr: {
2151                         guint32 align;
2152                         guint32 size;
2153
2154                         if (sig->params [i - sig->hasthis]->type == MONO_TYPE_TYPEDBYREF) {
2155                                 size = sizeof (MonoTypedRef);
2156                                 align = sizeof (gpointer);
2157                         }
2158                         else
2159                                 if (sig->pinvoke)
2160                                         size = mono_type_native_stack_size (&in->klass->byval_arg, &align);
2161                                 else {
2162                                         /*
2163                                          * Other backends use mono_type_stack_size (), but that
2164                                          * aligns the size to 8, which is larger than the size of
2165                                          * the source, leading to reads of invalid memory if the
2166                                          * source is at the end of address space.
2167                                          */
2168                                         size = mono_class_value_size (in->klass, &align);
2169                                 }
2170
2171                         g_assert (in->klass);
2172
2173                         ainfo->offparm += cinfo->sz.offStruct;
2174
2175                         MONO_INST_NEW (cfg, ins, OP_OUTARG_VT);
2176                         ins->sreg1 = in->dreg;
2177                         ins->klass = in->klass;
2178                         ins->backend.size = ainfo->size;
2179                         ins->inst_p0 = call;
2180                         ins->inst_p1 = mono_mempool_alloc (cfg->mempool, sizeof (ArgInfo));
2181                         memcpy (ins->inst_p1, ainfo, sizeof (ArgInfo));
2182
2183                         MONO_ADD_INS (cfg->cbb, ins);
2184
2185                         if (ainfo->regtype == RegTypeStructByAddr) {
2186                                 /*
2187                                  * We use OP_OUTARG_VT to copy the valuetype to a stack location, then
2188                                  * use the normal OUTARG opcodes to pass the address of the location to
2189                                  * the callee.
2190                                  */
2191                                 int treg = mono_alloc_preg (cfg);
2192                                 MONO_EMIT_NEW_BIALU_IMM (cfg, OP_ADD_IMM, treg,
2193                                                                                  STK_BASE, ainfo->offparm);
2194                                 if (ainfo->reg == STK_BASE) {
2195                                         /* The address is passed on the stack */
2196                                         MONO_INST_NEW (cfg, ins, OP_STORE_MEMBASE_REG);
2197                                         ins->inst_destbasereg = STK_BASE;
2198                                         ins->inst_offset = ainfo->offset;
2199                                         ins->sreg1 = treg;
2200                                         MONO_ADD_INS (cfg->cbb, ins);
2201                                 } else {
2202                                         mono_call_inst_add_outarg_reg (cfg, call, treg, ainfo->reg, FALSE);
2203                                 }
2204                         }
2205                         break;
2206                 }
2207                 case RegTypeBase:
2208                         if (!t->byref && t->type == MONO_TYPE_R4) {
2209                                 MONO_EMIT_NEW_STORE_MEMBASE (cfg, OP_STORER4_MEMBASE_REG,
2210                                                                                          STK_BASE, ainfo->offset,
2211                                                                                          in->dreg);
2212                         } else if (!t->byref && (t->type == MONO_TYPE_R8)) {
2213                                 MONO_EMIT_NEW_STORE_MEMBASE (cfg, OP_STORER8_MEMBASE_REG,
2214                                                                                          STK_BASE, ainfo->offset,
2215                                                                                          in->dreg);
2216                         } else if (!t->byref && (t->type == MONO_TYPE_I8 || t->type == MONO_TYPE_U8)) {
2217                                 MONO_INST_NEW (cfg, ins, OP_STORE_MEMBASE_REG);
2218                                 ins->inst_destbasereg = STK_BASE;
2219                                 ins->inst_offset = ainfo->offset + MINI_LS_WORD_OFFSET;
2220                                 ins->sreg1 = in->dreg + 1;
2221                                 MONO_ADD_INS (cfg->cbb, ins);
2222
2223                                 MONO_INST_NEW (cfg, ins, OP_STORE_MEMBASE_REG);
2224                                 ins->inst_destbasereg = STK_BASE;
2225                                 ins->inst_offset = ainfo->offset + MINI_MS_WORD_OFFSET;
2226                                 ins->sreg1 = in->dreg + 2;
2227                                 MONO_ADD_INS (cfg->cbb, ins);
2228                         } else {
2229                                 MONO_INST_NEW (cfg, ins, OP_STORE_MEMBASE_REG);
2230                                 ins->inst_destbasereg = STK_BASE;
2231                                 ins->inst_offset = ainfo->offset;
2232                                 ins->sreg1 = in->dreg;
2233                                 MONO_ADD_INS (cfg->cbb, ins);
2234                         }
2235                         break;
2236                 default:
2237                         g_assert_not_reached ();
2238                         break;
2239                 }
2240         }
2241
2242         /*
2243          * Handle the case where there are no implicit arguments
2244          */
2245         if ((sig->call_convention == MONO_CALL_VARARG) &&
2246             (i == sig->sentinelpos)) {
2247                 emit_sig_cookie (cfg, call, cinfo);
2248         }
2249 }
2250
2251 /*========================= End of Function ========================*/
2252
2253 /*------------------------------------------------------------------*/
2254 /*                                                                  */
2255 /* Name         - mono_arch_emit_outarg_vt                              */
2256 /*                                                                  */
2257 /*------------------------------------------------------------------*/
2258
2259 void
2260 mono_arch_emit_outarg_vt (MonoCompile *cfg, MonoInst *ins, MonoInst *src)
2261 {
2262         MonoCallInst *call = (MonoCallInst*)ins->inst_p0;
2263         ArgInfo *ainfo = (ArgInfo*)ins->inst_p1;
2264         int size = ins->backend.size;
2265
2266         if (ainfo->regtype == RegTypeStructByVal) {
2267                 /*
2268                                 arg->ins.sreg1  = ainfo->reg;
2269                                 arg->ins.opcode = OP_OUTARG_VT;
2270                                 arg->size       = ainfo->size;
2271                                 arg->offset     = ainfo->offset;
2272                                 arg->offPrm     = ainfo->offparm + cinfo->sz.offStruct;
2273                 */
2274                 if (ainfo->reg != STK_BASE) {
2275                         MONO_OUTPUT_VTR2 (cfg, size, ainfo->reg, src->dreg, 0);
2276                 } else {
2277                         MONO_OUTPUT_VTS2 (cfg, size, ainfo->reg, ainfo->offset,
2278                                                           src->dreg, 0);
2279                 }
2280         } else if (ainfo->regtype == RegTypeStructByValInFP) {
2281                 int dreg = mono_alloc_freg (cfg);
2282
2283                 if (ainfo->size == 4) {
2284                         MONO_EMIT_NEW_LOAD_MEMBASE_OP (cfg, OP_LOADR4_MEMBASE, dreg, src->dreg, 0);
2285                         MONO_EMIT_NEW_UNALU (cfg, OP_S390_SETF4RET, dreg, dreg);
2286                 } else {
2287                         g_assert (ainfo->size == 8);
2288
2289                         MONO_EMIT_NEW_LOAD_MEMBASE_OP (cfg, OP_LOADR8_MEMBASE, dreg, src->dreg, 0);
2290                 }
2291
2292                 mono_call_inst_add_outarg_reg (cfg, call, dreg, ainfo->reg, TRUE);
2293         } else {
2294                 MONO_EMIT_NEW_MOVE2 (cfg, STK_BASE, ainfo->offparm,
2295                                                          src->dreg, 0, size);
2296         }
2297 }
2298
2299 /*------------------------------------------------------------------*/
2300 /*                                                                  */
2301 /* Name         - mono_arch_emit_setret                                 */
2302 /*                                                                  */
2303 /*------------------------------------------------------------------*/
2304
2305 void
2306 mono_arch_emit_setret (MonoCompile *cfg, MonoMethod *method, MonoInst *val)
2307 {
2308         MonoType *ret = mono_type_get_underlying_type (mono_method_signature (method)->ret);
2309
2310         if (!ret->byref) {
2311                 if (ret->type == MONO_TYPE_R4) {
2312                         MONO_EMIT_NEW_UNALU (cfg, OP_S390_SETF4RET, s390_f0, val->dreg);
2313                         return;
2314                 } else if (ret->type == MONO_TYPE_R8) {
2315                         MONO_EMIT_NEW_UNALU (cfg, OP_FMOVE, s390_f0, val->dreg);
2316                         return;
2317                 } else if (ret->type == MONO_TYPE_I8 || ret->type == MONO_TYPE_U8) {
2318                         MONO_EMIT_NEW_UNALU (cfg, OP_MOVE, s390_r3, val->dreg + 1);
2319                         MONO_EMIT_NEW_UNALU (cfg, OP_MOVE, s390_r2, val->dreg + 2);
2320                         return;
2321                 }
2322         }
2323
2324         MONO_EMIT_NEW_UNALU (cfg, OP_MOVE, cfg->ret->dreg, val->dreg);
2325 }
2326
2327 /*========================= End of Function ========================*/
2328
2329 /*------------------------------------------------------------------*/
2330 /*                                                                  */
2331 /* Name         - mono_arch_instrument_mem_needs                    */
2332 /*                                                                  */
2333 /* Function     - Allow tracing to work with this interface (with   */
2334 /*                an optional argument).                            */
2335 /*                                                                  */
2336 /*------------------------------------------------------------------*/
2337
2338 void
2339 mono_arch_instrument_mem_needs (MonoMethod *method, int *stack, int *code)
2340 {
2341         /* no stack room needed now (may be needed for FASTCALL-trace support) */
2342         *stack = 0;
2343         /* split prolog-epilog requirements? */
2344         *code = 50; /* max bytes needed: check this number */
2345 }
2346
2347 /*========================= End of Function ========================*/
2348
2349 /*------------------------------------------------------------------*/
2350 /*                                                                  */
2351 /* Name         - mono_arch_instrument_prolog                       */
2352 /*                                                                  */
2353 /* Function     - Create an "instrumented" prolog.                  */
2354 /*                                                                  */
2355 /*------------------------------------------------------------------*/
2356
2357 void*
2358 mono_arch_instrument_prolog (MonoCompile *cfg, void *func, void *p,
2359                              gboolean enable_arguments)
2360 {
2361         guchar  *code = p;
2362         int     parmOffset,
2363                 fpOffset,
2364                 baseReg;
2365
2366         parmOffset = cfg->stack_usage - S390_TRACE_STACK_SIZE;
2367         if (cfg->method->save_lmf)
2368                 parmOffset -= sizeof(MonoLMF);
2369         fpOffset   = parmOffset + (5*sizeof(gint32));
2370         if (fpOffset > 4096) {
2371                 s390_lr (code, s390_r12, STK_BASE);
2372                 baseReg = s390_r12;
2373                 while (fpOffset > 4096) {
2374                         s390_ahi (code, baseReg, 4096);
2375                         fpOffset   -= 4096;
2376                         parmOffset -= 4096;
2377                 }
2378         } else {
2379                 baseReg = STK_BASE;
2380         }
2381
2382         s390_stm  (code, s390_r2, s390_r6, baseReg, parmOffset);
2383         s390_std  (code, s390_f0, 0, baseReg, fpOffset);
2384         s390_std  (code, s390_f1, 0, baseReg, fpOffset+sizeof(gdouble));
2385         s390_std  (code, s390_f2, 0, baseReg, fpOffset+2*sizeof(gdouble));
2386         s390_basr (code, s390_r13, 0);
2387         s390_j    (code, 6);
2388         s390_word (code, cfg->method);
2389         s390_word (code, func);
2390         s390_l    (code, s390_r2, 0, s390_r13, 4);
2391         s390_la   (code, s390_r3, 0, baseReg, parmOffset);
2392         s390_lr   (code, s390_r4, STK_BASE);
2393         s390_ahi  (code, s390_r4, cfg->stack_usage);
2394         s390_l    (code, s390_r1, 0, s390_r13, 8);
2395         s390_basr (code, s390_r14, s390_r1);
2396         s390_ld   (code, s390_f2, 0, baseReg, fpOffset+2*sizeof(gdouble));
2397         s390_ld   (code, s390_f1, 0, baseReg, fpOffset+sizeof(gdouble));
2398         s390_ld   (code, s390_f0, 0, baseReg, fpOffset);
2399         s390_lm   (code, s390_r2, s390_r6, baseReg, parmOffset);
2400
2401         return code;
2402 }
2403
2404 /*========================= End of Function ========================*/
2405
2406 /*------------------------------------------------------------------*/
2407 /*                                                                  */
2408 /* Name         - mono_arch_instrument_epilog                       */
2409 /*                                                                  */
2410 /* Function     - Create an epilog that will handle the returned    */
2411 /*                values used in instrumentation.                   */
2412 /*                                                                  */
2413 /*------------------------------------------------------------------*/
2414
2415 void*
2416 mono_arch_instrument_epilog (MonoCompile *cfg, void *func, void *p, gboolean enable_arguments)
2417 {
2418         guchar     *code = p;
2419         int        save_mode = SAVE_NONE,
2420                    saveOffset;
2421         MonoMethod *method = cfg->method;
2422         int        rtype = mono_type_get_underlying_type (mono_method_signature (method)->ret)->type;
2423
2424         saveOffset = cfg->stack_usage - S390_TRACE_STACK_SIZE;
2425         if (method->save_lmf)
2426                 saveOffset -= sizeof(MonoLMF);
2427
2428 handle_enum:
2429         switch (rtype) {
2430         case MONO_TYPE_VOID:
2431                 /* special case string .ctor icall */
2432                 if (strcmp (".ctor", method->name) && method->klass == mono_defaults.string_class)
2433                         save_mode = SAVE_ONE;
2434                 else
2435                         save_mode = SAVE_NONE;
2436                 break;
2437         case MONO_TYPE_I8:
2438         case MONO_TYPE_U8:
2439                 save_mode = SAVE_TWO;
2440                 break;
2441         case MONO_TYPE_R4:
2442                 save_mode = SAVE_R4;
2443                 break;
2444         case MONO_TYPE_R8:
2445                 save_mode = SAVE_R8;
2446                 break;
2447         case MONO_TYPE_VALUETYPE:
2448                 if (mono_method_signature (method)->ret->data.klass->enumtype) {
2449                         rtype = mono_method_signature (method)->ret->data.klass->enum_basetype->type;
2450                         goto handle_enum;
2451                 }
2452                 save_mode = SAVE_STRUCT;
2453                 break;
2454         default:
2455                 save_mode = SAVE_ONE;
2456                 break;
2457         }
2458
2459         switch (save_mode) {
2460         case SAVE_TWO:
2461                 s390_stm (code, s390_r2, s390_r3, cfg->frame_reg, saveOffset);
2462                 if (enable_arguments) {
2463                         s390_lr (code, s390_r4, s390_r3);
2464                         s390_lr (code, s390_r3, s390_r2);
2465                 }
2466                 break;
2467         case SAVE_ONE:
2468                 s390_st (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2469                 if (enable_arguments) {
2470                         s390_lr (code, s390_r3, s390_r2);
2471                 }
2472                 break;
2473         case SAVE_R4:
2474                 s390_std (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2475                 if (enable_arguments) {
2476                         s390_ldebr (code, s390_f0, s390_f0);
2477                 }
2478                 break;
2479         case SAVE_R8:
2480                 s390_std (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2481                 break;
2482         case SAVE_STRUCT:
2483                 s390_st (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2484                 if (enable_arguments) {
2485                         s390_l (code, s390_r3, 0, cfg->frame_reg,
2486                                 S390_MINIMAL_STACK_SIZE+cfg->param_area);
2487                 }
2488                 break;
2489         case SAVE_NONE:
2490         default:
2491                 break;
2492         }
2493
2494         s390_basr (code, s390_r13, 0);
2495         s390_j    (code, 6);
2496         s390_word (code, cfg->method);
2497         s390_word (code, func);
2498         s390_l    (code, s390_r2, 0, s390_r13, 4);
2499         s390_l    (code, s390_r1, 0, s390_r13, 8);
2500         s390_basr (code, s390_r14, s390_r1);
2501
2502         switch (save_mode) {
2503         case SAVE_TWO:
2504                 s390_lm  (code, s390_r2, s390_r3, cfg->frame_reg, saveOffset);
2505                 break;
2506         case SAVE_ONE:
2507                 s390_l   (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2508                 break;
2509         case SAVE_R4:
2510         case SAVE_R8:
2511                 s390_ld  (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2512                 break;
2513         case SAVE_STRUCT:
2514                 s390_l   (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2515                 break;
2516         case SAVE_NONE:
2517         default:
2518                 break;
2519         }
2520
2521         return code;
2522 }
2523
2524 /*========================= End of Function ========================*/
2525
2526 void
2527 mono_arch_peephole_pass_1 (MonoCompile *cfg, MonoBasicBlock *bb)
2528 {
2529 }
2530
2531 /*------------------------------------------------------------------*/
2532 /*                                                                  */
2533 /* Name         - mono_arch_peephole_pass                                     */
2534 /*                                                                  */
2535 /* Function     - Form a peephole pass at the code looking for      */
2536 /*                simple optimizations.                             */
2537 /*                                                                  */
2538 /*------------------------------------------------------------------*/
2539
2540 void
2541 mono_arch_peephole_pass_2 (MonoCompile *cfg, MonoBasicBlock *bb)
2542 {
2543         MonoInst *ins, *n;
2544
2545         MONO_BB_FOR_EACH_INS_SAFE (bb, n, ins) {
2546                 mono_peephole_ins (bb, ins);
2547         }
2548 }
2549
2550 /*========================= End of Function ========================*/
2551
2552 void
2553 mono_arch_lowering_pass (MonoCompile *cfg, MonoBasicBlock *bb)
2554 {
2555         MonoInst *ins, *next;
2556
2557         if (bb->max_vreg > cfg->rs->next_vreg)
2558                 cfg->rs->next_vreg = bb->max_vreg;
2559
2560         MONO_BB_FOR_EACH_INS_SAFE (bb, next, ins) {
2561                 switch (ins->opcode) {
2562                 case OP_DIV_IMM:
2563                 case OP_REM_IMM:
2564                 case OP_IDIV_IMM:
2565                 case OP_IREM_IMM:
2566                 case OP_IDIV_UN_IMM:
2567                 case OP_IREM_UN_IMM:
2568                 case OP_LOCALLOC_IMM:
2569                         mono_decompose_op_imm (cfg, bb, ins);
2570                         break;
2571                 default:
2572                         break;
2573                 }
2574         }
2575 }
2576
2577 /*========================= End of Function ========================*/
2578
2579 /*------------------------------------------------------------------*/
2580 /*                                                                  */
2581 /* Name         - emit_float_to_int                                 */
2582 /*                                                                  */
2583 /* Function     - Create instructions which will convert a floating */
2584 /*                point value to integer.                           */
2585 /*                                                                  */
2586 /*------------------------------------------------------------------*/
2587
2588 static guchar*
2589 emit_float_to_int (MonoCompile *cfg, guchar *code, int dreg, int sreg, int size, gboolean is_signed)
2590 {
2591         /* sreg is a float, dreg is an integer reg. */
2592         if (is_signed) {
2593                 s390_cfdbr (code, dreg, 5, sreg);
2594                 switch (size) {
2595                         case 1:
2596                                 s390_lhi  (code, s390_r0, 0);
2597                                 s390_lhi  (code, s390_r13, 0xff);
2598                                 s390_ltr  (code, dreg, dreg);
2599                                 s390_jnl  (code, 4);
2600                                 s390_lhi  (code, s390_r0, 0x80);
2601                                 s390_nr   (code, dreg, s390_r13);
2602                                 s390_or   (code, dreg, s390_r0);
2603                                 break;
2604                 }
2605         } else {
2606                 short *o[1];
2607                 s390_basr   (code, s390_r13, 0);
2608                 s390_j      (code, 10);
2609                 s390_llong  (code, 0x41e0000000000000LL);
2610                 s390_llong  (code, 0x41f0000000000000LL);
2611                 s390_ldr    (code, s390_f15, sreg);
2612                 s390_cdb    (code, s390_f15, 0, s390_r13, 4);
2613                 s390_jl     (code, 0); CODEPTR(code, o[0]);
2614                 s390_sdb    (code, s390_f15, 0, s390_r13, 12);
2615                 s390_cfdbr  (code, dreg, 7, s390_f15);
2616                 s390_j      (code, 4);
2617                 PTRSLOT(code, o[0]);
2618                 s390_cfdbr  (code, dreg, 5, sreg);
2619                 switch (size) {
2620                         case 1:
2621                                 s390_lhi  (code, s390_r0, 0xff);
2622                                 s390_nr   (code, dreg, s390_r0);
2623                                 break;
2624                         case 2:
2625                                 s390_lhi  (code, s390_r0, -1);
2626                                 s390_srl  (code, s390_r0, 0, 16);
2627                                 s390_nr   (code, dreg, s390_r0);
2628                                 break;
2629                 }
2630         }
2631         return code;
2632 }
2633
2634 /*========================= End of Function ========================*/
2635
2636 /*------------------------------------------------------------------*/
2637 /*                                                                  */
2638 /* Name         - mono_arch_output_basic_block                      */
2639 /*                                                                  */
2640 /* Function     - Perform the "real" work of emitting instructions  */
2641 /*                that will do the work of in the basic block.      */
2642 /*                                                                  */
2643 /*------------------------------------------------------------------*/
2644
2645 void
2646 mono_arch_output_basic_block (MonoCompile *cfg, MonoBasicBlock *bb)
2647 {
2648         MonoInst *ins;
2649         MonoCallInst *call;
2650         guint offset;
2651         guint8 *code = cfg->native_code + cfg->code_len;
2652         MonoInst *last_ins = NULL;
2653         guint last_offset = 0;
2654         int max_len, cpos, src2;
2655
2656         /* we don't align basic blocks of loops on s390 */
2657
2658         if (cfg->verbose_level > 2)
2659                 g_print ("Basic block %d starting at offset 0x%x\n", bb->block_num, bb->native_offset);
2660
2661         cpos = bb->max_offset;
2662
2663         if (cfg->prof_options & MONO_PROFILE_COVERAGE) {
2664                 //MonoCoverageInfo *cov = mono_get_coverage_info (cfg->method);
2665                 //g_assert (!mono_compile_aot);
2666                 //cpos += 6;
2667                 //if (bb->cil_code)
2668                 //      cov->data [bb->dfn].iloffset = bb->cil_code - cfg->cil_code;
2669                 /* this is not thread save, but good enough */
2670                 /* fixme: howto handle overflows? */
2671                 //x86_inc_mem (code, &cov->data [bb->dfn].count);
2672         }
2673
2674         MONO_BB_FOR_EACH_INS (bb, ins) {
2675                 offset = code - cfg->native_code;
2676
2677                 max_len = ((guint8 *)ins_get_spec (ins->opcode))[MONO_INST_LEN];
2678
2679                 if (offset > (cfg->code_size - max_len - 16)) {
2680                         cfg->code_size *= 2;
2681                         cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
2682                         code = cfg->native_code + offset;
2683                 }
2684
2685                 mono_debug_record_line_number (cfg, ins, offset);
2686
2687                 switch (ins->opcode) {
2688                 case OP_STOREI1_MEMBASE_IMM: {
2689                         s390_lhi (code, s390_r0, ins->inst_imm);
2690                         if (s390_is_uimm12(ins->inst_offset))
2691                                 s390_stc (code, s390_r0, 0, ins->inst_destbasereg, ins->inst_offset);
2692                         else {
2693                                 s390_basr (code, s390_r13, 0);
2694                                 s390_j    (code, 4);
2695                                 s390_word (code, ins->inst_offset);
2696                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2697                                 s390_stc  (code, s390_r0, s390_r13, ins->inst_destbasereg, 0);
2698                         }
2699                 }
2700                         break;
2701                 case OP_STOREI2_MEMBASE_IMM: {
2702                         s390_lhi (code, s390_r0, ins->inst_imm);
2703                         if (s390_is_uimm12(ins->inst_offset)) {
2704                                 s390_sth (code, s390_r0, 0, ins->inst_destbasereg, ins->inst_offset);
2705                         } else {
2706                                 s390_basr (code, s390_r13, 0);
2707                                 s390_j    (code, 4);
2708                                 s390_word (code, ins->inst_offset);
2709                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2710                                 s390_sth  (code, s390_r0, s390_r13, ins->inst_destbasereg, 0);
2711                         }
2712                 }
2713                         break;
2714                 case OP_STORE_MEMBASE_IMM:
2715                 case OP_STOREI4_MEMBASE_IMM: {
2716                         if (s390_is_imm16(ins->inst_imm)) {
2717                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2718                         } else {
2719                                 s390_basr (code, s390_r13, 0);
2720                                 s390_j    (code, 4);
2721                                 s390_word (code, ins->inst_imm);
2722                                 s390_l    (code, s390_r0, 0, s390_r13, 4);
2723                         }
2724                         if (s390_is_uimm12(ins->inst_offset)) {
2725                                 s390_st  (code, s390_r0, 0, ins->inst_destbasereg, ins->inst_offset);
2726                         } else {
2727                                 s390_basr (code, s390_r13, 0);
2728                                 s390_j    (code, 4);
2729                                 s390_word (code, ins->inst_offset);
2730                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2731                                 s390_st   (code, s390_r0, s390_r13, ins->inst_destbasereg, 0);
2732                         }
2733                 }
2734                         break;
2735                 case OP_STOREI1_MEMBASE_REG: {
2736                         if (s390_is_uimm12(ins->inst_offset)) {
2737                                 s390_stc  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
2738                         } else {
2739                                 s390_basr (code, s390_r13, 0);
2740                                 s390_j    (code, 4);
2741                                 s390_word (code, ins->inst_offset);
2742                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2743                                 s390_stc  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
2744                         }
2745                 }
2746                         break;
2747                 case OP_STOREI2_MEMBASE_REG: {
2748                         if (s390_is_uimm12(ins->inst_offset)) {
2749                                 s390_sth  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
2750                         } else {
2751                                 s390_basr (code, s390_r13, 0);
2752                                 s390_j    (code, 4);
2753                                 s390_word (code, ins->inst_offset);
2754                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2755                                 s390_sth  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
2756                         }
2757                 }
2758                         break;
2759                 case OP_STORE_MEMBASE_REG:
2760                 case OP_STOREI4_MEMBASE_REG: {
2761                         if (s390_is_uimm12(ins->inst_offset)) {
2762                                 s390_st   (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
2763                         } else {
2764                                 s390_basr (code, s390_r13, 0);
2765                                 s390_j    (code, 4);
2766                                 s390_word (code, ins->inst_offset);
2767                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2768                                 s390_st   (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
2769                         }
2770                 }
2771                         break;
2772                 case OP_LOADU4_MEM:
2773                         g_assert_not_reached ();
2774                         break;
2775                 case OP_LOAD_MEMBASE:
2776                 case OP_LOADI4_MEMBASE:
2777                 case OP_LOADU4_MEMBASE: {
2778                         if (s390_is_uimm12(ins->inst_offset))
2779                                 s390_l    (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
2780                         else {
2781                                 if (s390_is_imm16(ins->inst_offset)) {
2782                                         s390_lhi (code, s390_r13, ins->inst_offset);
2783                                         s390_l   (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
2784                                 } else {
2785                                         s390_basr (code, s390_r13, 0);
2786                                         s390_j    (code, 4);
2787                                         s390_word (code, ins->inst_offset);
2788                                         s390_l    (code, s390_r13, 0, s390_r13, 4);
2789                                         s390_l    (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
2790                                 }
2791                         }
2792                 }
2793                         break;
2794                 case OP_LOADU1_MEMBASE: {
2795                         s390_lhi (code, s390_r0, 0);
2796                         if (s390_is_uimm12(ins->inst_offset))
2797                                 s390_ic   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
2798                         else {
2799                                 s390_basr (code, s390_r13, 0);
2800                                 s390_j    (code, 4);
2801                                 s390_word (code, ins->inst_offset);
2802                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2803                                 s390_ic   (code, s390_r0, s390_r13, ins->inst_basereg, 0);
2804                         }
2805                         s390_lr   (code, ins->dreg, s390_r0);
2806                 }
2807                         break;
2808                 case OP_LOADI1_MEMBASE: {
2809                         s390_lhi (code, s390_r0, 0);
2810                         if (s390_is_uimm12(ins->inst_offset))
2811                                 s390_ic   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
2812                         else {
2813                                 s390_basr (code, s390_r13, 0);
2814                                 s390_j    (code, 4);
2815                                 s390_word (code, ins->inst_offset);
2816                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2817                                 s390_ic   (code, s390_r0, s390_r13, ins->inst_basereg, 0);
2818                         }
2819                         s390_lhi  (code, s390_r13, 0x80);
2820                         s390_nr   (code, s390_r13, s390_r0);
2821                         s390_jz   (code, 5);
2822                         s390_lhi  (code, s390_r13, 0xff00);
2823                         s390_or   (code, s390_r0, s390_r13);
2824                         s390_lr   (code, ins->dreg, s390_r0);
2825                 }
2826                         break;
2827                 case OP_LOADU2_MEMBASE: {
2828                         s390_lhi (code, s390_r0, 0);
2829                         if (s390_is_uimm12(ins->inst_offset))
2830                                 s390_icm  (code, s390_r0, 3, ins->inst_basereg, ins->inst_offset);
2831                         else {
2832                                 s390_basr (code, s390_r13, 0);
2833                                 s390_j    (code, 4);
2834                                 s390_word (code, ins->inst_offset);
2835                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2836                                 s390_ar   (code, s390_r13, ins->inst_basereg);
2837                                 s390_icm  (code, s390_r0, 3, s390_r13, 0);
2838                         }
2839                         s390_lr  (code, ins->dreg, s390_r0);
2840                 }
2841                         break;
2842                 case OP_LOADI2_MEMBASE: {
2843                         s390_lhi (code, s390_r0, 0);
2844                         if (s390_is_uimm12(ins->inst_offset))
2845                                 s390_lh   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
2846                         else {
2847                                 s390_basr (code, s390_r13, 0);
2848                                 s390_j    (code, 4);
2849                                 s390_word (code, ins->inst_offset);
2850                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2851                                 s390_lh   (code, s390_r0, s390_r13, ins->inst_basereg, 0);
2852                         }
2853                         s390_lr  (code, ins->dreg, s390_r0);
2854                 }
2855                         break;
2856
2857                 case OP_ICONV_TO_I1: {
2858                         if (ins->dreg != ins->sreg1)
2859                                 s390_lr   (code, ins->dreg, ins->sreg1);
2860                         s390_sll (code, ins->dreg, 0, 24);
2861                         s390_sra (code, ins->dreg, 0, 24);
2862                 }
2863                         break;
2864                 case OP_ICONV_TO_I2: {
2865                         if (ins->dreg != ins->sreg1)
2866                                 s390_lr   (code, ins->dreg, ins->sreg1);
2867                         s390_sll (code, ins->dreg, 0, 16);
2868                         s390_sra (code, ins->dreg, 0, 16);
2869                 }
2870                         break;
2871                 case OP_ICONV_TO_U1: {
2872                         s390_lhi  (code, s390_r0, 0xff);
2873                         if (ins->dreg != ins->sreg1) {
2874                                 s390_lr   (code, ins->dreg, ins->sreg1);
2875                         }
2876                         s390_nr   (code, ins->dreg, s390_r0);
2877                 }
2878                         break;
2879                 case OP_ICONV_TO_U2: {
2880                         s390_lhi  (code, s390_r0, -1);
2881                         s390_sll  (code, s390_r0, 0, 16);
2882                         s390_srl  (code, s390_r0, 0, 16);
2883                         if (ins->dreg != ins->sreg1) {
2884                                 s390_lr   (code, ins->dreg, ins->sreg1);
2885                         }
2886                         s390_nr   (code, ins->dreg, s390_r0);
2887                 }
2888                         break;
2889                 case OP_COMPARE:
2890                 case OP_ICOMPARE: {
2891                         gboolean un = FALSE;
2892                         MonoInst *next = ins->next;
2893
2894                         if ((next) &&
2895                             (((next->opcode >= OP_IBNE_UN) &&
2896                               (next->opcode <= OP_IBLT_UN)) ||
2897                              ((next->opcode >= OP_COND_EXC_NE_UN) &&
2898                               (next->opcode <= OP_COND_EXC_LT_UN)) ||
2899                              ((next->opcode >= OP_COND_EXC_INE_UN) &&
2900                               (next->opcode <= OP_COND_EXC_ILT_UN)) ||
2901                              ((next->opcode == OP_CLT_UN) ||
2902                               (next->opcode == OP_CGT_UN)) ||
2903                              ((next->opcode == OP_ICLT_UN) ||
2904                               (next->opcode == OP_ICGT_UN))))
2905                                 un = TRUE;
2906
2907                         if (un)
2908                                 s390_clr  (code, ins->sreg1, ins->sreg2);
2909                         else
2910                                 s390_cr   (code, ins->sreg1, ins->sreg2);
2911                 }
2912                         break;
2913                 case OP_COMPARE_IMM:
2914                 case OP_ICOMPARE_IMM: {
2915                         gboolean un = FALSE;
2916                         MonoInst *next = ins->next;
2917
2918                         if ((next) &&
2919                             (((next->opcode >= OP_IBNE_UN) &&
2920                               (next->opcode <= OP_IBLT_UN)) ||
2921                              ((next->opcode >= OP_COND_EXC_NE_UN) &&
2922                               (next->opcode <= OP_COND_EXC_LT_UN)) ||
2923                              ((next->opcode >= OP_COND_EXC_INE_UN) &&
2924                               (next->opcode <= OP_COND_EXC_ILT_UN)) ||
2925                              ((next->opcode == OP_CLT_UN) ||
2926                               (next->opcode == OP_CGT_UN)) ||
2927                              ((next->opcode == OP_ICLT_UN) ||
2928                               (next->opcode == OP_ICGT_UN))))
2929                                 un = TRUE;
2930
2931                         if (s390_is_imm16 (ins->inst_imm)) {
2932                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2933                                 if (un)
2934                                         s390_clr  (code, ins->sreg1, s390_r0);
2935                                 else
2936                                         s390_cr   (code, ins->sreg1, s390_r0);
2937                         }
2938                         else {
2939                                 s390_basr (code, s390_r13, 0);
2940                                 s390_j    (code, 4);
2941                                 s390_word (code, ins->inst_imm);
2942                                 if (un)
2943                                         s390_cl   (code, ins->sreg1, 0, s390_r13, 4);
2944                                 else
2945                                         s390_c    (code, ins->sreg1, 0, s390_r13, 4);
2946                         }
2947                 }
2948                         break;
2949                 case OP_BREAK: {
2950                         mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS, mono_break);
2951                         s390_brasl (code, s390_r14, 0);
2952                 }
2953                         break;
2954                 case OP_ADDCC:
2955                 case OP_IADDCC: {
2956                         CHECK_SRCDST_COM;
2957                         s390_alr  (code, ins->dreg, src2);
2958                 }
2959                         break;
2960                 case OP_IADD: {
2961                         CHECK_SRCDST_COM;
2962                         s390_ar   (code, ins->dreg, src2);
2963                 }
2964                         break;
2965                 case OP_ADC:
2966                 case OP_IADC: {
2967                         CHECK_SRCDST_COM;
2968                         s390_alcr (code, ins->dreg, src2);
2969                 }
2970                         break;
2971                 case OP_ADD_IMM:
2972                 case OP_IADD_IMM: {
2973                         if (ins->dreg != ins->sreg1) {
2974                                 s390_lr   (code, ins->dreg, ins->sreg1);
2975                         }
2976                         if ((ins->next) &&
2977                             (ins->next->opcode == OP_ADC_IMM)) {
2978                                 s390_basr (code, s390_r13, 0);
2979                                 s390_j    (code, 4);
2980                                 s390_word (code, ins->inst_imm);
2981                                 s390_a (code, ins->dreg, 0, s390_r13, 4);
2982                         } else {
2983                                 if (s390_is_imm16 (ins->inst_imm)) {
2984                                         s390_ahi  (code, ins->dreg, ins->inst_imm);
2985                                 } else {
2986                                         s390_basr (code, s390_r13, 0);
2987                                         s390_j    (code, 4);
2988                                         s390_word (code, ins->inst_imm);
2989                                         s390_a (code, ins->dreg, 0, s390_r13, 4);
2990                                 }
2991                         }
2992                 }
2993                         break;
2994                 case OP_ADDCC_IMM: {
2995                         if ((ins->next) &&
2996                             (ins->next->opcode == OP_ADC_IMM)) {
2997                                 s390_basr (code, s390_r13, 0);
2998                                 s390_j    (code, 4);
2999                                 s390_word (code, ins->inst_imm);
3000                                 if (ins->dreg != ins->sreg1) {
3001                                         s390_lr   (code, ins->dreg, ins->sreg1);
3002                                 }
3003                                 s390_al   (code, ins->dreg, 0, s390_r13, 4);
3004                         } else {
3005                                 if (s390_is_imm16 (ins->inst_imm)) {
3006                                         if (ins->dreg != ins->sreg1) {
3007                                                 s390_lr   (code, ins->dreg, ins->sreg1);
3008                                         }
3009                                         s390_lhi  (code, s390_r0, ins->inst_imm);
3010                                         s390_alcr (code, ins->dreg, s390_r0);
3011                                 } else {
3012                                         s390_basr (code, s390_r13, 0);
3013                                         s390_j    (code, 4);
3014                                         s390_word (code, ins->inst_imm);
3015                                         if (ins->dreg != ins->sreg1) {
3016                                                 s390_lr   (code, ins->dreg, ins->sreg1);
3017                                         }
3018                                         s390_al   (code, ins->dreg, 0, s390_r13, 4);
3019                                 }
3020                         }
3021                 }
3022                         break;
3023                 case OP_ADC_IMM: {
3024                         if (s390_is_imm16 (ins->inst_imm)) {
3025                                 if (ins->dreg != ins->sreg1) {
3026                                         s390_lr   (code, ins->dreg, ins->sreg1);
3027                                 }
3028                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3029                                 s390_alcr (code, ins->dreg, s390_r0);
3030                         } else {
3031                                 s390_basr (code, s390_r13, 0);
3032                                 s390_j    (code, 4);
3033                                 s390_word (code, ins->inst_imm);
3034                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3035                                 s390_alcr (code, ins->dreg, s390_r13);
3036                         }
3037                 }
3038                         break;
3039                 case OP_IADD_OVF:
3040                 case OP_S390_IADD_OVF: {
3041                         CHECK_SRCDST_COM;
3042                         s390_ar   (code, ins->dreg, src2);
3043                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3044                 }
3045                         break;
3046                 case OP_IADD_OVF_UN:
3047                 case OP_S390_IADD_OVF_UN: {
3048                         CHECK_SRCDST_COM;
3049                         s390_alr  (code, ins->dreg, src2);
3050                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
3051                 }
3052                         break;
3053                 case OP_LADD:
3054                 case OP_S390_LADD: {
3055                         s390_alr  (code, s390_r0, ins->sreg1);
3056                         s390_jnc  (code, 4);
3057                         s390_ahi  (code, s390_r1, 1);
3058                         s390_ar   (code, s390_r1, ins->sreg2);
3059                         s390_lr   (code, ins->dreg, s390_r0);
3060                         s390_lr   (code, ins->dreg+1, s390_r1);
3061                 }
3062                         break;
3063                 case OP_LADD_OVF:
3064                 case OP_S390_LADD_OVF: {
3065                         short int *o[1];
3066                         s390_alr  (code, s390_r0, ins->sreg1);
3067                         s390_jnc  (code, 0); CODEPTR(code, o[0]);
3068                         s390_ahi  (code, s390_r1, 1);
3069                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3070                         PTRSLOT   (code, o[0]);
3071                         s390_ar   (code, s390_r1, ins->sreg2);
3072                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3073                         s390_lr   (code, ins->dreg, s390_r0);
3074                         s390_lr   (code, ins->dreg+1, s390_r1);
3075                 }
3076                         break;
3077                 case OP_LADD_OVF_UN:
3078                 case OP_S390_LADD_OVF_UN: {
3079                         s390_alr  (code, s390_r0, ins->sreg1);
3080                         s390_alcr (code, s390_r1, ins->sreg2);
3081                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
3082                         s390_lr   (code, ins->dreg, s390_r0);
3083                         s390_lr   (code, ins->dreg+1, s390_r1);
3084                 }
3085                         break;
3086                 case OP_ADD_OVF_CARRY: {
3087                         CHECK_SRCDST_COM;
3088                         s390_lhi  (code, s390_r0, 0);
3089                         s390_lr   (code, s390_r1, s390_r0);
3090                         s390_alcr (code, s390_r0, s390_r1);
3091                         s390_ar   (code, ins->dreg, src2);
3092                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3093                         s390_ar   (code, ins->dreg, s390_r0);
3094                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3095                 }
3096                         break;
3097                 case OP_ADD_OVF_UN_CARRY: {
3098                         CHECK_SRCDST_COM;
3099                         s390_alcr (code, ins->dreg, src2);
3100                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
3101                 }
3102                         break;
3103                 case OP_SUBCC:
3104                 case OP_ISUBCC: {
3105                         CHECK_SRCDST_NCOM;
3106                         s390_slr (code, ins->dreg, src2);
3107                 }
3108                         break;
3109                 case OP_ISUB: {
3110                         CHECK_SRCDST_NCOM;
3111                         s390_sr   (code, ins->dreg, src2);
3112                 }
3113                         break;
3114                 case OP_SBB:
3115                 case OP_ISBB: {
3116                         CHECK_SRCDST_NCOM;
3117                         s390_slbr (code, ins->dreg, src2);
3118                 }
3119                         break;
3120                 case OP_SUBCC_IMM: {
3121                         if (s390_is_imm16 (-ins->inst_imm)) {
3122                                 if (ins->dreg != ins->sreg1) {
3123                                         s390_lr   (code, ins->dreg, ins->sreg1);
3124                                 }
3125                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3126                                 s390_slr  (code, ins->dreg, s390_r0);
3127                         } else {
3128                                 s390_basr (code, s390_r13, 0);
3129                                 s390_j    (code, 4);
3130                                 s390_word (code, ins->inst_imm);
3131                                 if (ins->dreg != ins->sreg1) {
3132                                         s390_lr   (code, ins->dreg, ins->sreg1);
3133                                 }
3134                                 s390_sl   (code, ins->dreg, 0, s390_r13, 4);
3135                         }
3136                 }
3137                         break;
3138                 case OP_SUB_IMM:
3139                 case OP_ISUB_IMM: {
3140                         if (s390_is_imm16 (-ins->inst_imm)) {
3141                                 if (ins->dreg != ins->sreg1) {
3142                                         s390_lr   (code, ins->dreg, ins->sreg1);
3143                                 }
3144                                 s390_ahi  (code, ins->dreg, -ins->inst_imm);
3145                         } else {
3146                                 s390_basr (code, s390_r13, 0);
3147                                 s390_j    (code, 4);
3148                                 s390_word (code, ins->inst_imm);
3149                                 if (ins->dreg != ins->sreg1) {
3150                                         s390_lr   (code, ins->dreg, ins->sreg1);
3151                                 }
3152                                 s390_s    (code, ins->dreg, 0, s390_r13, 4);
3153                         }
3154                 }
3155                         break;
3156                 case OP_SBB_IMM: {
3157                         if (ins->dreg != ins->sreg1) {
3158                                 s390_lr    (code, ins->dreg, ins->sreg1);
3159                         }
3160                         if (s390_is_imm16 (-ins->inst_imm)) {
3161                                 s390_lhi   (code, s390_r0, ins->inst_imm);
3162                                 s390_slbr  (code, ins->dreg, s390_r0);
3163                         } else {
3164                                 s390_basr (code, s390_r13, 0);
3165                                 s390_j    (code, 4);
3166                                 s390_word (code, ins->inst_imm);
3167                                 s390_slb  (code, ins->dreg, 0, s390_r13, 4);
3168                         }
3169                 }
3170                         break;
3171                 case OP_ISUB_OVF:
3172                 case OP_S390_ISUB_OVF: {
3173                         CHECK_SRCDST_NCOM;
3174                         s390_sr   (code, ins->dreg, src2);
3175                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3176                 }
3177                         break;
3178                 case OP_ISUB_OVF_UN:
3179                 case OP_S390_ISUB_OVF_UN: {
3180                         CHECK_SRCDST_NCOM;
3181                         s390_slr  (code, ins->dreg, src2);
3182                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
3183                 }
3184                         break;
3185                 case OP_LSUB:
3186                 case OP_S390_LSUB: {
3187                         s390_lr   (code, s390_r14, ins->sreg2);
3188                         s390_slr  (code, s390_r0, ins->sreg1);
3189                         s390_jnl  (code, 4);
3190                         s390_ahi  (code, s390_r14, 1);
3191                         s390_sr   (code, s390_r1, s390_r14);
3192                         s390_lr   (code, ins->dreg, s390_r0);
3193                         s390_lr   (code, ins->dreg+1, s390_r1);
3194                 }
3195                         break;
3196                 case OP_LSUB_OVF:
3197                 case OP_S390_LSUB_OVF: {
3198                         short int *o[1];
3199                         s390_lr   (code, s390_r14, ins->sreg2);
3200                         s390_slr  (code, s390_r0, ins->sreg1);
3201                         s390_jnl  (code, 0); CODEPTR(code, o[0]);
3202                         s390_ahi  (code, s390_r14, 1);
3203                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3204                         PTRSLOT   (code, o[0]);
3205                         s390_sr   (code, s390_r1, s390_r14);
3206                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3207                         s390_lr   (code, ins->dreg, s390_r0);
3208                         s390_lr   (code, ins->dreg+1, s390_r1);
3209                 }
3210                         break;
3211                 case OP_LSUB_OVF_UN:
3212                 case OP_S390_LSUB_OVF_UN: {
3213                         s390_slr  (code, s390_r0, ins->sreg1);
3214                         s390_slbr (code, s390_r1, ins->sreg2);
3215                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, "OverflowException");
3216                         s390_lr   (code, ins->dreg, s390_r0);
3217                         s390_lr   (code, ins->dreg+1, s390_r1);
3218                 }
3219                         break;
3220                 case OP_SUB_OVF_CARRY: {
3221                         CHECK_SRCDST_NCOM;
3222                         s390_lhi  (code, s390_r0, 0);
3223                         s390_lr   (code, s390_r1, s390_r0);
3224                         s390_slbr (code, s390_r0, s390_r1);
3225                         s390_sr   (code, ins->dreg, src2);
3226                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3227                         s390_ar   (code, ins->dreg, s390_r0);
3228                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3229                 }
3230                         break;
3231                 case OP_SUB_OVF_UN_CARRY: {
3232                         CHECK_SRCDST_NCOM;
3233                         s390_slbr (code, ins->dreg, src2);
3234                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
3235                 }
3236                         break;
3237                 case OP_IAND: {
3238                         if (ins->sreg1 == ins->dreg) {
3239                                 s390_nr   (code, ins->dreg, ins->sreg2);
3240                         }
3241                         else {
3242                                 if (ins->sreg2 == ins->dreg) {
3243                                         s390_nr  (code, ins->dreg, ins->sreg1);
3244                                 }
3245                                 else {
3246                                         s390_lr  (code, ins->dreg, ins->sreg1);
3247                                         s390_nr  (code, ins->dreg, ins->sreg2);
3248                                 }
3249                         }
3250                 }
3251                         break;
3252                 case OP_AND_IMM:
3253                 case OP_IAND_IMM: {
3254                         if (s390_is_imm16 (ins->inst_imm)) {
3255                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3256                                 if (ins->dreg != ins->sreg1) {
3257                                         s390_lr   (code, ins->dreg, ins->sreg1);
3258                                 }
3259                                 s390_nr   (code, ins->dreg, s390_r0);
3260                         } else {
3261                                 s390_basr (code, s390_r13, 0);
3262                                 s390_j    (code, 4);
3263                                 s390_word (code, ins->inst_imm);
3264                                 if (ins->dreg != ins->sreg1) {
3265                                         s390_lr   (code, ins->dreg, ins->sreg1);
3266                                 }
3267                                 s390_n    (code, ins->dreg, 0, s390_r13, 4);
3268                         }
3269                 }
3270                         break;
3271                 case OP_IDIV: {
3272                         s390_lr   (code, s390_r0, ins->sreg1);
3273                         s390_srda (code, s390_r0, 0, 32);
3274                         s390_dr   (code, s390_r0, ins->sreg2);
3275                         s390_lr   (code, ins->dreg, s390_r1);
3276                 }
3277                         break;
3278                 case OP_IDIV_UN: {
3279                         s390_lr   (code, s390_r0, ins->sreg1);
3280                         s390_srdl (code, s390_r0, 0, 32);
3281                         s390_dlr  (code, s390_r0, ins->sreg2);
3282                         s390_lr   (code, ins->dreg, s390_r1);
3283                 }
3284                         break;
3285                 case OP_IREM: {
3286                         s390_lr   (code, s390_r0, ins->sreg1);
3287                         s390_srda (code, s390_r0, 0, 32);
3288                         s390_dr   (code, s390_r0, ins->sreg2);
3289                         s390_lr   (code, ins->dreg, s390_r0);
3290                         break;
3291                 case OP_IREM_UN:
3292                         s390_lr   (code, s390_r0, ins->sreg1);
3293                         s390_srdl (code, s390_r0, 0, 32);
3294                         s390_dlr  (code, s390_r0, ins->sreg2);
3295                         s390_lr   (code, ins->dreg, s390_r0);
3296                 }
3297                         break;
3298                 case OP_IOR: {
3299                         if (ins->sreg1 == ins->dreg) {
3300                                 s390_or   (code, ins->dreg, ins->sreg2);
3301                         }
3302                         else {
3303                                 if (ins->sreg2 == ins->dreg) {
3304                                         s390_or  (code, ins->dreg, ins->sreg1);
3305                                 }
3306                                 else {
3307                                         s390_lr  (code, ins->dreg, ins->sreg1);
3308                                         s390_or  (code, ins->dreg, ins->sreg2);
3309                                 }
3310                         }
3311                 }
3312                         break;
3313                 case OP_OR_IMM:
3314                 case OP_IOR_IMM: {
3315                         if (s390_is_imm16 (ins->inst_imm)) {
3316                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3317                                 if (ins->dreg != ins->sreg1) {
3318                                         s390_lr   (code, ins->dreg, ins->sreg1);
3319                                 }
3320                                 s390_or   (code, ins->dreg, s390_r0);
3321                         } else {
3322                                 s390_basr (code, s390_r13, 0);
3323                                 s390_j    (code, 4);
3324                                 s390_word (code, ins->inst_imm);
3325                                 if (ins->dreg != ins->sreg1) {
3326                                         s390_lr   (code, ins->dreg, ins->sreg1);
3327                                 }
3328                                 s390_o    (code, ins->dreg, 0, s390_r13, 4);
3329                         }
3330                 }
3331                         break;
3332                 case OP_IXOR: {
3333                         if (ins->sreg1 == ins->dreg) {
3334                                 s390_xr   (code, ins->dreg, ins->sreg2);
3335                         }
3336                         else {
3337                                 if (ins->sreg2 == ins->dreg) {
3338                                         s390_xr  (code, ins->dreg, ins->sreg1);
3339                                 }
3340                                 else {
3341                                         s390_lr  (code, ins->dreg, ins->sreg1);
3342                                         s390_xr  (code, ins->dreg, ins->sreg2);
3343                                 }
3344                         }
3345                 }
3346                         break;
3347                 case OP_XOR_IMM:
3348                 case OP_IXOR_IMM: {
3349                         if (s390_is_imm16 (ins->inst_imm)) {
3350                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3351                                 if (ins->dreg != ins->sreg1) {
3352                                         s390_lr   (code, ins->dreg, ins->sreg1);
3353                                 }
3354                                 s390_xr   (code, ins->dreg, s390_r0);
3355                         } else {
3356                                 s390_basr (code, s390_r13, 0);
3357                                 s390_j    (code, 4);
3358                                 s390_word (code, ins->inst_imm);
3359                                 if (ins->dreg != ins->sreg1) {
3360                                         s390_lr   (code, ins->dreg, ins->sreg1);
3361                                 }
3362                                 s390_x    (code, ins->dreg, 0, s390_r13, 4);
3363                         }
3364                 }
3365                         break;
3366                 case OP_ISHL: {
3367                         CHECK_SRCDST_NCOM;
3368                         s390_sll  (code, ins->dreg, src2, 0);
3369                 }
3370                         break;
3371                 case OP_SHL_IMM:
3372                 case OP_ISHL_IMM: {
3373                         if (ins->sreg1 != ins->dreg) {
3374                                 s390_lr   (code, ins->dreg, ins->sreg1);
3375                         }
3376                         s390_sll  (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3377                 }
3378                         break;
3379                 case OP_ISHR: {
3380                         CHECK_SRCDST_NCOM;
3381                         s390_sra  (code, ins->dreg, src2, 0);
3382                 }
3383                         break;
3384                 case OP_SHR_IMM:
3385                 case OP_ISHR_IMM: {
3386                         if (ins->sreg1 != ins->dreg) {
3387                                 s390_lr   (code, ins->dreg, ins->sreg1);
3388                         }
3389                         s390_sra  (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3390                 }
3391                         break;
3392                 case OP_SHR_UN_IMM:
3393                 case OP_ISHR_UN_IMM: {
3394                         if (ins->sreg1 != ins->dreg) {
3395                                 s390_lr   (code, ins->dreg, ins->sreg1);
3396                         }
3397                         s390_srl  (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3398                 }
3399                         break;
3400                 case OP_ISHR_UN: {
3401                         CHECK_SRCDST_NCOM;
3402                         s390_srl  (code, ins->dreg, src2, 0);
3403                 }
3404                         break;
3405                 case OP_INOT: {
3406                         if (ins->sreg1 != ins->dreg) {
3407                                 s390_lr   (code, ins->dreg, ins->sreg1);
3408                         }
3409                         s390_lhi (code, s390_r0, -1);
3410                         s390_xr  (code, ins->dreg, s390_r0);
3411                 }
3412                         break;
3413                 case OP_INEG: {
3414                         s390_lcr (code, ins->dreg, ins->sreg1);
3415                 }
3416                         break;
3417                 case OP_S390_LNEG: {
3418                         /* From gcc code */
3419                         g_assert (ins->dreg + 1 != ins->sreg1);
3420                         s390_lcr (code, ins->dreg + 1, ins->sreg2);
3421                         s390_lcr (code, ins->dreg, ins->sreg1);
3422                         s390_je (code, 3);
3423                         s390_bctr (code, ins->dreg + 1, 0);
3424                 }
3425                         break;
3426                 case OP_IMUL: {
3427                         if (ins->sreg1 == ins->dreg) {
3428                                 s390_msr  (code, ins->dreg, ins->sreg2);
3429                         }
3430                         else {
3431                                 if (ins->sreg2 == ins->dreg) {
3432                                         s390_msr (code, ins->dreg, ins->sreg1);
3433                                 }
3434                                 else {
3435                                         s390_lr  (code, ins->dreg, ins->sreg1);
3436                                         s390_msr (code, ins->dreg, ins->sreg2);
3437                                 }
3438                         }
3439                 }
3440                         break;
3441                 case OP_MUL_IMM:
3442                 case OP_IMUL_IMM: {
3443                         if (s390_is_imm16 (ins->inst_imm)) {
3444                                 s390_lhi  (code, s390_r13, ins->inst_imm);
3445                         } else {
3446                                 s390_basr (code, s390_r13, 0);
3447                                 s390_j    (code, 4);
3448                                 s390_word (code, ins->inst_imm);
3449 //                              if (ins->dreg != ins->sreg1) {
3450 //                                      s390_lr   (code, ins->dreg, ins->sreg1);
3451 //                              }
3452                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3453                         }
3454                         if (ins->dreg != ins->sreg1) {
3455                                 s390_lr   (code, ins->dreg, ins->sreg1);
3456                         }
3457                         s390_msr  (code, ins->dreg, s390_r13);
3458                 }
3459                         break;
3460                 case OP_IMUL_OVF: {
3461                         short int *o[2];
3462                         s390_ltr  (code, s390_r1, ins->sreg1);
3463                         s390_jz   (code, 0); CODEPTR(code, o[0]);
3464                         s390_ltr  (code, s390_r0, ins->sreg2);
3465                         s390_jnz  (code, 6);
3466                         s390_lhi  (code, s390_r1, 0);
3467                         s390_j    (code, 0); CODEPTR(code, o[1]);
3468                         s390_xr   (code, s390_r0, s390_r1);
3469                         s390_msr  (code, s390_r1, ins->sreg2);
3470                         s390_xr   (code, s390_r0, s390_r1);
3471                         s390_srl  (code, s390_r0, 0, 31);
3472                         s390_ltr  (code, s390_r0, s390_r0);
3473                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3474                         PTRSLOT   (code, o[0]);
3475                         PTRSLOT   (code, o[1]);
3476                         s390_lr   (code, ins->dreg, s390_r1);
3477                 }
3478                         break;
3479                 case OP_IMUL_OVF_UN: {
3480                         s390_lhi  (code, s390_r0, 0);
3481                         s390_lr   (code, s390_r1, ins->sreg1);
3482                         s390_mlr  (code, s390_r0, ins->sreg2);
3483                         s390_ltr  (code, s390_r0, s390_r0);
3484                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3485                         s390_lr   (code, ins->dreg, s390_r1);
3486                 }
3487                         break;
3488                 case OP_LMUL: {
3489                         s390_l    (code, s390_r0, 0, ins->sreg1, 4);
3490                         s390_srda (code, s390_r0, 0, 32);
3491                         s390_m    (code, s390_r0, 0, ins->sreg2, 4);
3492                         s390_l    (code, s390_r0, 0, ins->sreg1, 4);
3493                         s390_srl  (code, s390_r0, 0, 31);
3494                         s390_a    (code, s390_r0, 0, ins->sreg1, 0);
3495                         s390_l    (code, s390_r13, 0, ins->sreg2, 0);
3496                         s390_srl  (code, s390_r13, 0, 31);
3497                         s390_ms   (code, s390_r13, 0, ins->sreg1, 4);
3498                         s390_ar   (code, s390_r0, s390_r13);
3499                         s390_st   (code, s390_r0, 0, ins->dreg, 0);
3500                         s390_st   (code, s390_r1, 0, ins->dreg, 4);
3501                 }
3502                         break;
3503                 case OP_ICONST: {
3504                         if (s390_is_imm16(ins->inst_c0)) {
3505                                 s390_lhi  (code, ins->dreg, ins->inst_c0);
3506                         } else {
3507                                 s390_basr (code, s390_r13, 0);
3508                                 s390_j    (code, 4);
3509                                 s390_word (code, ins->inst_c0);
3510                                 s390_l    (code, ins->dreg, 0, s390_r13, 4);
3511                         }
3512                 }
3513                         break;
3514                 case OP_AOTCONST: {
3515                         s390_basr (code, s390_r13, 0);
3516                         s390_j    (code, 4);
3517                         mono_add_patch_info (cfg, code - cfg->native_code,
3518                                 (MonoJumpInfoType)ins->inst_i1, ins->inst_p0);
3519                         s390_word (code, 0);
3520                         s390_l    (code,ins->dreg, 0, s390_r13, 4);
3521                 }
3522                         break;
3523                 case OP_JUMP_TABLE: {
3524                         mono_add_patch_info (cfg, code - cfg->native_code,
3525                                 (MonoJumpInfoType)ins->inst_i1, ins->inst_p0);
3526                         s390_basr (code, s390_r13, 0);
3527                         s390_j    (code, 4);
3528                         s390_word (code, 0);
3529                         s390_l    (code, ins->dreg, 0, s390_r13, 4);
3530                 }
3531                         break;
3532                 case OP_ICONV_TO_I4:
3533                 case OP_ICONV_TO_U4:
3534                 case OP_MOVE: {
3535                         if (ins->dreg != ins->sreg1) {
3536                                 s390_lr (code, ins->dreg, ins->sreg1);
3537                         }
3538                 }
3539                         break;
3540                 case OP_SETLRET: {
3541                         int saved = ins->sreg1;
3542                         if (ins->sreg1 == s390_r2) {
3543                                 s390_lr (code, s390_r0, ins->sreg1);
3544                                 saved = s390_r0;
3545                         }
3546                         if (ins->sreg2 != s390_r2)
3547                                 s390_lr (code, s390_r2, ins->sreg2);
3548                         if (saved != s390_r3)
3549                                 s390_lr (code, s390_r3, saved);
3550                         break;
3551                 }
3552                 case OP_FMOVE: {
3553                         if (ins->dreg != ins->sreg1) {
3554                                 s390_ldr   (code, ins->dreg, ins->sreg1);
3555                         }
3556                 }
3557                         break;
3558                 case OP_S390_SETF4RET: {
3559                         s390_ledbr (code, ins->dreg, ins->sreg1);
3560                 }
3561                         break;
3562                 case OP_TLS_GET: {
3563                         if (s390_is_imm16 (ins->inst_offset)) {
3564                                 s390_lhi (code, s390_r13, ins->inst_offset);
3565                         } else {
3566                                 s390_bras (code, s390_r13, 0);
3567                                 s390_j    (code, 4);
3568                                 s390_word (code, ins->inst_offset);
3569                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3570                         }
3571                         s390_ear (code, s390_r1, 0);
3572                         s390_l   (code, ins->dreg, s390_r13, s390_r1, 0);
3573                 }
3574                         break;
3575                 case OP_FCONV_TO_R4: {
3576                         // FIXME:
3577                         if (ins->dreg != ins->sreg1) {
3578                                 s390_ldr   (code, ins->dreg, ins->sreg1);
3579                         }
3580                         /*
3581                         NOT_IMPLEMENTED;
3582                         if ((ins->next) &&
3583                              (ins->next->opcode != OP_FMOVE) &&
3584                              (ins->next->opcode != OP_STORER4_MEMBASE_REG))
3585                                 s390_ledbr (code, ins->dreg, ins->sreg1);
3586                         */
3587                 }
3588                         break;
3589                 case OP_JMP: {
3590                         if (cfg->method->save_lmf)
3591                                 restoreLMF(code, cfg->frame_reg, cfg->stack_usage);
3592
3593                         if (cfg->flags & MONO_CFG_HAS_TAIL) {
3594                                 code = emit_load_volatile_registers(code, cfg);
3595                         }
3596
3597                         code = backUpStackPtr(cfg, code, STK_BASE);
3598                         s390_l   (code, s390_r14, 0, STK_BASE, S390_RET_ADDR_OFFSET);
3599                         mono_add_patch_info (cfg, code - cfg->native_code,
3600                                              MONO_PATCH_INFO_METHOD_JUMP,
3601                                              ins->inst_p0);
3602                         s390_jcl (code, S390_CC_UN, 0);
3603                 }
3604                         break;
3605                 case OP_CHECK_THIS: {
3606                         /* ensure ins->sreg1 is not NULL */
3607                         s390_icm (code, s390_r0, 15, ins->sreg1, 0);
3608                 }
3609                         break;
3610                 case OP_ARGLIST: {
3611                         int offset = cfg->sig_cookie + cfg->stack_usage;
3612
3613                         if (s390_is_imm16 (offset))
3614                                 s390_lhi  (code, s390_r0, offset);
3615                         else {
3616                                 s390_basr (code, s390_r13, 0);
3617                                 s390_j    (code, 4);
3618                                 s390_word (code, offset);
3619                                 s390_l    (code, s390_r0, 0, s390_r13, 0);
3620                         }
3621                         s390_ar   (code, s390_r0, cfg->frame_reg);
3622                         s390_st   (code, s390_r0, 0, ins->sreg1, 0);
3623                 }
3624                         break;
3625                 case OP_FCALL: {
3626                         call = (MonoCallInst*)ins;
3627                         if (ins->flags & MONO_INST_HAS_METHOD)
3628                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_METHOD,
3629                                                      call->method);
3630                         else
3631                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS,
3632                                                      call->fptr);
3633                         s390_brasl (code, s390_r14, 0);
3634                         if (call->signature->ret->type == MONO_TYPE_R4)
3635                                 s390_ldebr (code, s390_f0, s390_f0);
3636                 }
3637                         break;
3638                 case OP_LCALL:
3639                 case OP_VCALL:
3640                 case OP_VCALL2:
3641                 case OP_VOIDCALL:
3642                 case OP_CALL: {
3643                         call = (MonoCallInst*)ins;
3644                         if (ins->flags & MONO_INST_HAS_METHOD)
3645                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_METHOD, call->method);
3646                         else
3647                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS, call->fptr);
3648                         s390_brasl (code, s390_r14, 0);
3649                 }
3650                         break;
3651                 case OP_FCALL_REG: {
3652                         call = (MonoCallInst*)ins;
3653                         s390_lr   (code, s390_r1, ins->sreg1);
3654                         s390_basr (code, s390_r14, s390_r1);
3655                         if (call->signature->ret->type == MONO_TYPE_R4)
3656                                 s390_ldebr (code, s390_f0, s390_f0);
3657                 }
3658                         break;
3659                 case OP_LCALL_REG:
3660                 case OP_VCALL_REG:
3661                 case OP_VCALL2_REG:
3662                 case OP_VOIDCALL_REG:
3663                 case OP_CALL_REG: {
3664                         s390_lr   (code, s390_r1, ins->sreg1);
3665                         s390_basr (code, s390_r14, s390_r1);
3666                 }
3667                         break;
3668                 case OP_LCALL_MEMBASE:
3669                 case OP_VCALL_MEMBASE:
3670                 case OP_VCALL2_MEMBASE:
3671                 case OP_VOIDCALL_MEMBASE:
3672                 case OP_FCALL_MEMBASE:
3673                 case OP_CALL_MEMBASE: {
3674                         call = (MonoCallInst*)ins;
3675                         if (s390_is_uimm12(ins->inst_offset))
3676                                 s390_l    (code, s390_r1, 0, ins->inst_basereg, ins->inst_offset);
3677                         else {
3678                                 if (s390_is_imm16(ins->inst_offset)) {
3679                                         s390_lhi (code, s390_r13, ins->inst_offset);
3680                                         s390_l   (code, s390_r1, s390_r13, ins->inst_basereg, 0);
3681                                 } else {
3682                                         s390_basr (code, s390_r13, 0);
3683                                         s390_j    (code, 4);
3684                                         s390_word (code, ins->inst_offset);
3685                                         s390_l    (code, s390_r13, 0, s390_r13, 4);
3686                                         s390_l    (code, s390_r1, s390_r13, ins->inst_basereg, 0);
3687                                 }
3688                         }
3689                         s390_basr (code, s390_r14, s390_r1);
3690                         if (ins->opcode == OP_FCALL_MEMBASE && call->signature->ret->type == MONO_TYPE_R4)
3691                                 s390_ldebr (code, s390_f0, s390_f0);
3692                 }
3693                         break;
3694                 case OP_LOCALLOC: {
3695                         /*------------------------------------------*/
3696                         /* To allocate space on the stack we have   */
3697                         /* to allow room for parameters passed in   */
3698                         /* calls, the backchain pointer and round   */
3699                         /* it to our stack alignment requirements   */
3700                         /*------------------------------------------*/
3701                         int alloca_skip = S390_MINIMAL_STACK_SIZE + cfg->param_area;
3702                         int area_offset = S390_ALIGN(alloca_skip, S390_STACK_ALIGNMENT);
3703                         s390_lr   (code, s390_r1, ins->sreg1);
3704                         if (ins->flags & MONO_INST_INIT)
3705                                 s390_lr   (code, s390_r0, ins->sreg1);
3706                         s390_ahi  (code, s390_r1, 14);
3707                         s390_srl  (code, s390_r1, 0, 3);
3708                         s390_sll  (code, s390_r1, 0, 3);
3709                         if (cfg->method->save_lmf) {
3710                                 /*----------------------------------*/
3711                                 /* we have to adjust lmf ebp value  */
3712                                 /*----------------------------------*/
3713                                 int lmfOffset = cfg->stack_usage - sizeof(MonoLMF);
3714
3715                                 s390_lr (code, s390_r13, cfg->frame_reg);
3716                                 if (s390_is_uimm16(lmfOffset))
3717                                         s390_ahi   (code, s390_r13, lmfOffset);
3718                                 else {
3719                                         s390_basr (code, s390_r14, 0);
3720                                         s390_j    (code, 4);
3721                                         s390_word (code, lmfOffset);
3722                                         s390_a    (code, s390_r13, 0, s390_r14, 4);
3723                                 }
3724                                 s390_lr (code, s390_r14, STK_BASE);
3725                                 s390_sr (code, s390_r14, s390_r1);
3726                                 s390_st (code, s390_r14, 0, s390_r13,
3727                                          G_STRUCT_OFFSET(MonoLMF, ebp));
3728                         }
3729                         s390_l    (code, s390_r13, 0, STK_BASE, 0);
3730                         s390_sr   (code, STK_BASE, s390_r1);
3731                         s390_st   (code, s390_r13, 0, STK_BASE, 0);
3732                         s390_la   (code, ins->dreg, 0, STK_BASE, area_offset);
3733                         s390_srl  (code, ins->dreg, 0, 3);
3734                         s390_sll  (code, ins->dreg, 0, 3);
3735                         if (ins->flags & MONO_INST_INIT) {
3736                                 s390_lr   (code, s390_r1, s390_r0);
3737                                 s390_lr   (code, s390_r0, ins->dreg);
3738                                 s390_lr   (code, s390_r14, s390_r12);
3739                                 s390_lhi  (code, s390_r13, 0);
3740                                 s390_mvcle(code, s390_r0, s390_r12, 0, 0);
3741                                 s390_jo   (code, -2);
3742                                 s390_lr   (code, s390_r12, s390_r14);
3743                         }
3744                 }
3745                         break;
3746                 case OP_THROW: {
3747                         s390_lr (code, s390_r2, ins->sreg1);
3748                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD,
3749                                              (gpointer)"mono_arch_throw_exception");
3750                         s390_brasl (code, s390_r14, 0);
3751                 }
3752                         break;
3753                 case OP_RETHROW: {
3754                         s390_lr (code, s390_r2, ins->sreg1);
3755                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD,
3756                                              (gpointer)"mono_arch_rethrow_exception");
3757                         s390_brasl (code, s390_r14, 0);
3758                 }
3759                         break;
3760                 case OP_START_HANDLER: {
3761                         MonoInst *spvar = mono_find_spvar_for_region (cfg, bb->region);
3762                         if (s390_is_uimm12 (spvar->inst_offset)) {
3763                                 s390_st   (code, s390_r14, 0,
3764                                            spvar->inst_basereg,
3765                                            spvar->inst_offset);
3766                         } else {
3767                                 s390_basr (code, s390_r13, 0);
3768                                 s390_j    (code, 4);
3769                                 s390_word (code, spvar->inst_offset);
3770                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3771                                 s390_st   (code, s390_r14, s390_r13,
3772                                                    spvar->inst_basereg, 0);
3773                         }
3774                 }
3775                         break;
3776                 case OP_ENDFILTER: {
3777                         MonoInst *spvar = mono_find_spvar_for_region (cfg, bb->region);
3778                         if (ins->sreg1 != s390_r2)
3779                                 s390_lr (code, s390_r2, ins->sreg1);
3780                         if (s390_is_uimm12 (spvar->inst_offset)) {
3781                                 s390_l  (code, s390_r14, 0, spvar->inst_basereg,
3782                                          spvar->inst_offset);
3783                         } else {
3784                                 s390_basr (code, s390_r13, 0);
3785                                 s390_j    (code, 4);
3786                                 s390_word (code, spvar->inst_offset);
3787                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3788                                 s390_l    (code, s390_r14, s390_r13,
3789                                                    spvar->inst_basereg, 0);
3790                         }
3791                         s390_br  (code, s390_r14);
3792                 }
3793                         break;
3794                 case OP_ENDFINALLY: {
3795                         MonoInst *spvar = mono_find_spvar_for_region (cfg, bb->region);
3796                         if (s390_is_uimm12 (spvar->inst_offset)) {
3797                                 s390_l  (code, s390_r14, 0, spvar->inst_basereg,
3798                                          spvar->inst_offset);
3799                         } else {
3800                                 s390_basr (code, s390_r13, 0);
3801                                 s390_j    (code, 4);
3802                                 s390_word (code, spvar->inst_offset);
3803                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3804                                 s390_l    (code, s390_r14, s390_r13,
3805                                                    spvar->inst_basereg, 0);
3806                         }
3807                         s390_br  (code, s390_r14);
3808                 }
3809                         break;
3810                 case OP_CALL_HANDLER: {
3811                         mono_add_patch_info (cfg, code-cfg->native_code,
3812                                              MONO_PATCH_INFO_BB, ins->inst_target_bb);
3813                         s390_brasl (code, s390_r14, 0);
3814                 }
3815                         break;
3816                 case OP_LABEL: {
3817                         ins->inst_c0 = code - cfg->native_code;
3818                 }
3819                         break;
3820                 case OP_RELAXED_NOP:
3821                 case OP_NOP:
3822                 case OP_DUMMY_USE:
3823                 case OP_DUMMY_STORE:
3824                 case OP_NOT_REACHED:
3825                 case OP_NOT_NULL: {
3826                 }
3827                         break;
3828                 case OP_BR:
3829                         EMIT_UNCOND_BRANCH(ins);
3830                         break;
3831                 case OP_BR_REG: {
3832                         s390_br  (code, ins->sreg1);
3833                 }
3834                         break;
3835                 case OP_CEQ:
3836                 case OP_ICEQ: {
3837                         s390_lhi (code, ins->dreg, 1);
3838                         s390_jz  (code, 4);
3839                         s390_lhi (code, ins->dreg, 0);
3840                 }
3841                         break;
3842                 case OP_CLT:
3843                 case OP_ICLT: {
3844                         s390_lhi (code, ins->dreg, 1);
3845                         s390_jl  (code, 4);
3846                         s390_lhi (code, ins->dreg, 0);
3847                 }
3848                         break;
3849                 case OP_CLT_UN:
3850                 case OP_ICLT_UN: {
3851                         s390_lhi (code, ins->dreg, 1);
3852                         s390_jlo (code, 4);
3853                         s390_lhi (code, ins->dreg, 0);
3854                 }
3855                         break;
3856                 case OP_CGT:
3857                 case OP_ICGT: {
3858                         s390_lhi (code, ins->dreg, 1);
3859                         s390_jh  (code, 4);
3860                         s390_lhi (code, ins->dreg, 0);
3861                 }
3862                         break;
3863                 case OP_CGT_UN:
3864                 case OP_ICGT_UN: {
3865                         s390_lhi (code, ins->dreg, 1);
3866                         s390_jho (code, 4);
3867                         s390_lhi (code, ins->dreg, 0);
3868                 }
3869                         break;
3870                 case OP_COND_EXC_EQ:
3871                 case OP_COND_EXC_IEQ:
3872                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_EQ, ins->inst_p1);
3873                         break;
3874                 case OP_COND_EXC_NE_UN:
3875                 case OP_COND_EXC_INE_UN:
3876                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NE, ins->inst_p1);
3877                         break;
3878                 case OP_COND_EXC_LT:
3879                 case OP_COND_EXC_ILT:
3880                 case OP_COND_EXC_LT_UN:
3881                 case OP_COND_EXC_ILT_UN:
3882                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, ins->inst_p1);
3883                         break;
3884                 case OP_COND_EXC_GT:
3885                 case OP_COND_EXC_IGT:
3886                 case OP_COND_EXC_GT_UN:
3887                 case OP_COND_EXC_IGT_UN:
3888                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GT, ins->inst_p1);
3889                         break;
3890                 case OP_COND_EXC_GE:
3891                 case OP_COND_EXC_IGE:
3892                 case OP_COND_EXC_GE_UN:
3893                 case OP_COND_EXC_IGE_UN:
3894                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GE, ins->inst_p1);
3895                         break;
3896                 case OP_COND_EXC_LE:
3897                 case OP_COND_EXC_ILE:
3898                 case OP_COND_EXC_LE_UN:
3899                 case OP_COND_EXC_ILE_UN:
3900                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LE, ins->inst_p1);
3901                         break;
3902                 case OP_COND_EXC_OV:
3903                 case OP_COND_EXC_IOV:
3904                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, ins->inst_p1);
3905                         break;
3906                 case OP_COND_EXC_NO:
3907                 case OP_COND_EXC_INO:
3908                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NO, ins->inst_p1);
3909                         break;
3910                 case OP_COND_EXC_C:
3911                 case OP_COND_EXC_IC:
3912                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, ins->inst_p1);
3913                         break;
3914                 case OP_COND_EXC_NC:
3915                 case OP_COND_EXC_INC:
3916                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, ins->inst_p1);
3917                         break;
3918                 case OP_IBEQ:
3919                         EMIT_COND_BRANCH (ins, S390_CC_EQ);
3920                         break;
3921                 case OP_IBNE_UN:
3922                         EMIT_COND_BRANCH (ins, S390_CC_NE);
3923                         break;
3924                 case OP_IBLT:
3925                 case OP_IBLT_UN:
3926                         EMIT_COND_BRANCH (ins, S390_CC_LT);
3927                         break;
3928                 case OP_IBGT:
3929                 case OP_IBGT_UN:
3930                         EMIT_COND_BRANCH (ins, S390_CC_GT);
3931                         break;
3932                 case OP_IBGE:
3933                 case OP_IBGE_UN:
3934                         EMIT_COND_BRANCH (ins, S390_CC_GE);
3935                         break;
3936                 case OP_IBLE:
3937                 case OP_IBLE_UN:
3938                         EMIT_COND_BRANCH (ins, S390_CC_LE);
3939                         break;
3940
3941                 /* floating point opcodes */
3942                 case OP_R8CONST: {
3943                         if (*((float *) ins->inst_p0) == 0) {
3944                                 s390_lzdr (code, ins->dreg);
3945                         } else {
3946                                 s390_basr  (code, s390_r13, 0);
3947                                 s390_j     (code, 4);
3948                                 s390_word  (code, ins->inst_p0);
3949                                 s390_l     (code, s390_r13, 0, s390_r13, 4);
3950                                 s390_ld    (code, ins->dreg, 0, s390_r13, 0);
3951                         }
3952                 }
3953                         break;
3954                 case OP_R4CONST: {
3955                         if (*((float *) ins->inst_p0) == 0) {
3956                                 s390_lzdr (code, ins->dreg);
3957                         } else {
3958                                 s390_basr (code, s390_r13, 0);
3959                                 s390_j    (code, 4);
3960                                 s390_word (code, ins->inst_p0);
3961                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3962                                 s390_ldeb (code, ins->dreg, 0, s390_r13, 0);
3963                         }
3964                 }
3965                         break;
3966                 case OP_STORER8_MEMBASE_REG: {
3967                         if (s390_is_uimm12(ins->inst_offset)) {
3968                                 s390_std  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
3969                         } else {
3970                                 s390_basr (code, s390_r13, 0);
3971                                 s390_j    (code, 4);
3972                                 s390_word (code, ins->inst_offset);
3973                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3974                                 s390_std  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
3975                         }
3976                 }
3977                         break;
3978                 case OP_LOADR8_MEMBASE: {
3979                         if (s390_is_uimm12(ins->inst_offset)) {
3980                                 s390_ld   (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
3981                         } else {
3982                                 s390_basr (code, s390_r13, 0);
3983                                 s390_j    (code, 4);
3984                                 s390_word (code, ins->inst_offset);
3985                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3986                                 s390_ld   (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
3987                         }
3988                 }
3989                         break;
3990                 case OP_STORER4_MEMBASE_REG: {
3991                         if (s390_is_uimm12(ins->inst_offset)) {
3992                                 s390_ledbr(code, s390_f15, ins->sreg1);
3993                                 s390_ste  (code, s390_f15, 0, ins->inst_destbasereg, ins->inst_offset);
3994                         } else {
3995                                 s390_basr (code, s390_r13, 0);
3996                                 s390_j    (code, 4);
3997                                 s390_word (code, ins->inst_offset);
3998                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3999                                 s390_ledbr(code, s390_f15, ins->sreg1);
4000                                 s390_ste  (code, s390_f15, s390_r13, ins->inst_destbasereg, 0);
4001                         }
4002                 }
4003                         break;
4004                 case OP_LOADR4_MEMBASE: {
4005                         if (s390_is_uimm12(ins->inst_offset)) {
4006                                 s390_ldeb (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
4007                         } else {
4008                                 s390_basr (code, s390_r13, 0);
4009                                 s390_j    (code, 4);
4010                                 s390_word (code, ins->inst_offset);
4011                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
4012                                 s390_ldeb (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
4013                         }
4014                 }
4015                         break;
4016                 case OP_ICONV_TO_R_UN: {
4017                         s390_cdfbr (code, ins->dreg, ins->sreg1);
4018                         s390_ltr   (code, ins->sreg1, ins->sreg1);
4019                         s390_jnl   (code, 12);
4020                         s390_basr  (code, s390_r13, 0);
4021                         s390_j     (code, 6);
4022                         s390_word  (code, 0x41f00000);
4023                         s390_word  (code, 0);
4024                         s390_adb   (code, ins->dreg, 0, s390_r13, 4);
4025                 }
4026                         break;
4027                 case OP_ICONV_TO_R4: {
4028                         s390_cdfbr (code, ins->dreg, ins->sreg1);
4029                 }
4030                         break;
4031                 case OP_ICONV_TO_R8: {
4032                         s390_cdfbr (code, ins->dreg, ins->sreg1);
4033                 }
4034                         break;
4035                 case OP_FCONV_TO_I1:
4036                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 1, TRUE);
4037                         break;
4038                 case OP_FCONV_TO_U1:
4039                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 1, FALSE);
4040                         break;
4041                 case OP_FCONV_TO_I2:
4042                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 2, TRUE);
4043                         break;
4044                 case OP_FCONV_TO_U2:
4045                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 2, FALSE);
4046                         break;
4047                 case OP_FCONV_TO_I4:
4048                 case OP_FCONV_TO_I:
4049                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 4, TRUE);
4050                         break;
4051                 case OP_FCONV_TO_U4:
4052                 case OP_FCONV_TO_U:
4053                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 4, FALSE);
4054                         break;
4055                 case OP_FCONV_TO_I8:
4056                 case OP_FCONV_TO_U8:
4057                         g_assert_not_reached ();
4058                         /* Implemented as helper calls */
4059                         break;
4060                 case OP_LCONV_TO_R_UN:
4061                         g_assert_not_reached ();
4062                         /* Implemented as helper calls */
4063                         break;
4064                 case OP_LCONV_TO_OVF_I:
4065                 case OP_LCONV_TO_OVF_I4_2: {
4066                         /* Valid ints: 0xffffffff:8000000 to 00000000:0x7f000000 */
4067                         short int *o[5];
4068                         s390_ltr  (code, ins->sreg1, ins->sreg1);
4069                         s390_jnl  (code, 0); CODEPTR(code, o[0]);
4070                         s390_ltr  (code, ins->sreg2, ins->sreg2);
4071                         s390_jnl  (code, 0); CODEPTR(code, o[1]);
4072                         s390_lhi  (code, s390_r13, -1);
4073                         s390_cr   (code, ins->sreg2, s390_r13);
4074                         s390_jnz  (code, 0); CODEPTR(code, o[2]);
4075                         s390_j    (code, 0); CODEPTR(code, o[3]);
4076                         PTRSLOT(code, o[0]);
4077                         s390_ltr  (code, ins->sreg2, ins->sreg2);
4078                         s390_jz   (code, 0); CODEPTR(code, o[4]);
4079                         PTRSLOT(code, o[1]);
4080                         PTRSLOT(code, o[2]);
4081                         mono_add_patch_info (cfg, code - cfg->native_code,
4082                                              MONO_PATCH_INFO_EXC, "OverflowException");
4083                         s390_brasl (code, s390_r14, 0);
4084                         PTRSLOT(code, o[3]);
4085                         PTRSLOT(code, o[4]);
4086                         if (ins->dreg != ins->sreg1)
4087                                 s390_lr   (code, ins->dreg, ins->sreg1);
4088                 }
4089                         break;
4090                 case OP_SQRT: {
4091                         s390_sqdbr (code, ins->dreg, ins->sreg1);
4092                 }
4093                         break;
4094                 case OP_FADD: {
4095                         CHECK_SRCDST_COM_F;
4096                         s390_adbr (code, ins->dreg, src2);
4097                 }
4098                         break;
4099                 case OP_FSUB: {
4100                         CHECK_SRCDST_NCOM_F;
4101                         s390_sdbr (code, ins->dreg, src2);
4102                 }
4103                         break;
4104                 case OP_FMUL: {
4105                         CHECK_SRCDST_COM_F;
4106                         s390_mdbr (code, ins->dreg, src2);
4107                 }
4108                         break;
4109                 case OP_FDIV: {
4110                         CHECK_SRCDST_NCOM_F;
4111                         s390_ddbr (code, ins->dreg, src2);
4112                 }
4113                         break;
4114                 case OP_FNEG: {
4115                         s390_lcdbr (code, ins->dreg, ins->sreg1);
4116                 }
4117                         break;
4118                 case OP_FREM: {
4119                         CHECK_SRCDST_NCOM_F;
4120                         s390_didbr (code, ins->dreg, src2, 5, s390_f15);
4121                 }
4122                         break;
4123                 case OP_FCOMPARE: {
4124                         s390_cdbr (code, ins->sreg1, ins->sreg2);
4125                 }
4126                         break;
4127                 case OP_FCEQ: {
4128                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4129                         s390_lhi   (code, ins->dreg, 1);
4130                         s390_je    (code, 4);
4131                         s390_lhi   (code, ins->dreg, 0);
4132                 }
4133                         break;
4134                 case OP_FCLT: {
4135                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4136                         s390_lhi   (code, ins->dreg, 1);
4137                         s390_jl    (code, 4);
4138                         s390_lhi   (code, ins->dreg, 0);
4139                 }
4140                         break;
4141                 case OP_FCLT_UN: {
4142                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4143                         s390_lhi   (code, ins->dreg, 1);
4144                         s390_jlo   (code, 4);
4145                         s390_lhi   (code, ins->dreg, 0);
4146                 }
4147                         break;
4148                 case OP_FCGT: {
4149                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4150                         s390_lhi   (code, ins->dreg, 1);
4151                         s390_jh    (code, 4);
4152                         s390_lhi   (code, ins->dreg, 0);
4153                 }
4154                         break;
4155                 case OP_FCGT_UN: {
4156                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4157                         s390_lhi   (code, ins->dreg, 1);
4158                         s390_jho   (code, 4);
4159                         s390_lhi   (code, ins->dreg, 0);
4160                 }
4161                         break;
4162                 case OP_FBEQ: {
4163                         short *o;
4164                         s390_jo (code, 0); CODEPTR(code, o);
4165                         EMIT_COND_BRANCH (ins, S390_CC_EQ);
4166                         PTRSLOT(code, o);
4167                 }
4168                         break;
4169                 case OP_FBNE_UN:
4170                         EMIT_COND_BRANCH (ins, S390_CC_NE|S390_CC_OV);
4171                         break;
4172                 case OP_FBLT: {
4173                         short *o;
4174                         s390_jo (code, 0); CODEPTR(code, o);
4175                         EMIT_COND_BRANCH (ins, S390_CC_LT);
4176                         PTRSLOT(code, o);
4177                 }
4178                         break;
4179                 case OP_FBLT_UN:
4180                         EMIT_COND_BRANCH (ins, S390_CC_LT|S390_CC_OV);
4181                         break;
4182                 case OP_FBGT: {
4183                         short *o;
4184                         s390_jo (code, 0); CODEPTR(code, o);
4185                         EMIT_COND_BRANCH (ins, S390_CC_GT);
4186                         PTRSLOT(code, o);
4187                 }
4188                         break;
4189                 case OP_FBGT_UN:
4190                         EMIT_COND_BRANCH (ins, S390_CC_GT|S390_CC_OV);
4191                         break;
4192                 case OP_FBGE: {
4193                         short *o;
4194                         s390_jo (code, 0); CODEPTR(code, o);
4195                         EMIT_COND_BRANCH (ins, S390_CC_GE);
4196                         PTRSLOT(code, o);
4197                 }
4198                         break;
4199                 case OP_FBGE_UN:
4200                         EMIT_COND_BRANCH (ins, S390_CC_GE|S390_CC_OV);
4201                         break;
4202                 case OP_FBLE: {
4203                         short *o;
4204                         s390_jo (code, 0); CODEPTR(code, o);
4205                         EMIT_COND_BRANCH (ins, S390_CC_LE);
4206                         PTRSLOT(code, o);
4207                 }
4208                         break;
4209                 case OP_FBLE_UN:
4210                         EMIT_COND_BRANCH (ins, S390_CC_LE|S390_CC_OV);
4211                         break;
4212                 case OP_CKFINITE: {
4213                         short *o;
4214                         s390_lhi  (code, s390_r13, 0x7f);
4215                         s390_tcdb (code, ins->sreg1, 0, s390_r13, 0);
4216                         s390_jz   (code, 0); CODEPTR(code, o);
4217                         mono_add_patch_info (cfg, code - cfg->native_code,
4218                                              MONO_PATCH_INFO_EXC, "ArithmeticException");
4219                         s390_brasl (code, s390_r14,0);
4220                         PTRSLOT(code, o);
4221                 }
4222                         break;
4223                 case OP_S390_MOVE: {
4224                         if (ins->backend.size > 0) {
4225                                 if (ins->backend.size <= 256) {
4226                                         s390_mvc  (code, ins->backend.size, ins->dreg,
4227                                                    ins->inst_offset, ins->sreg1, ins->inst_imm);
4228                                 } else {
4229                                         s390_lr   (code, s390_r0, ins->dreg);
4230                                         if (s390_is_imm16 (ins->inst_offset)) {
4231                                                 s390_ahi  (code, s390_r0, ins->inst_offset);
4232                                         } else {
4233                                                 s390_basr (code, s390_r13, 0);
4234                                                 s390_j    (code, 4);
4235                                                 s390_word (code, ins->inst_offset);
4236                                                 s390_a    (code, s390_r0, 0, s390_r13, 4);
4237                                         }
4238                                         s390_lr   (code, s390_r14, s390_r12);
4239                                         s390_lr   (code, s390_r12, ins->sreg1);
4240                                         if (s390_is_imm16 (ins->inst_imm)) {
4241                                                 s390_ahi  (code, s390_r12, ins->inst_imm);
4242                                         } else {
4243                                                 s390_basr (code, s390_r13, 0);
4244                                                 s390_j    (code, 4);
4245                                                 s390_word (code, ins->inst_imm);
4246                                                 s390_a    (code, s390_r12, 0, s390_r13, 4);
4247                                         }
4248                                         s390_lr   (code, s390_r1, ins->sreg1);
4249                                         s390_lr   (code, s390_r13, s390_r1);
4250                                         s390_mvcle(code, s390_r0, s390_r12, 0, 0);
4251                                         s390_jo   (code, -2);
4252                                         s390_lr   (code, s390_r12, s390_r14);
4253                                 }
4254                         }
4255                 }
4256                         break;
4257                 case OP_ATOMIC_ADD_I4: {
4258                         s390_lr  (code, s390_r1, ins->sreg2);
4259                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4260                         s390_a   (code, s390_r1, 0, ins->inst_basereg, ins->inst_offset);
4261                         s390_cs  (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
4262                         s390_jnz (code, -7);
4263                         s390_lr  (code, ins->dreg, s390_r1);
4264                 }
4265                         break;
4266                 case OP_ATOMIC_ADD_NEW_I4: {
4267                         s390_lr  (code, s390_r1, ins->sreg2);
4268                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4269                         s390_a   (code, s390_r1, 0, ins->inst_basereg, ins->inst_offset);
4270                         s390_cs  (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
4271                         s390_jnz (code, -7);
4272                         s390_lr  (code, ins->dreg, s390_r1);
4273                 }
4274                         break;
4275                 case OP_ATOMIC_EXCHANGE_I4: {
4276                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4277                         s390_cs  (code, s390_r0, ins->sreg2, ins->inst_basereg, ins->inst_offset);
4278                         s390_jnz (code, -4);
4279                         s390_lr  (code, ins->dreg, s390_r0);
4280                 }
4281                         break;
4282                 case OP_S390_BKCHAIN: {
4283                         s390_lr  (code, ins->dreg, ins->sreg1);
4284                         if (s390_is_imm16 (cfg->stack_offset)) {
4285                                 s390_ahi (code, ins->dreg, cfg->stack_offset);
4286                         } else {
4287                                 s390_basr (code, s390_r13, 0);
4288                                 s390_j    (code, 6);
4289                                 s390_word (code, cfg->stack_offset);
4290                                 s390_a    (code, ins->dreg, 0, s390_r13, 4);
4291                         }
4292                 }
4293                 case OP_MEMORY_BARRIER: {
4294                 }
4295                         break;
4296                 default:
4297                         g_warning ("unknown opcode %s in %s()\n", mono_inst_name (ins->opcode), __FUNCTION__);
4298                         g_assert_not_reached ();
4299                 }
4300
4301                 if ((cfg->opt & MONO_OPT_BRANCH) && ((code - cfg->native_code - offset) > max_len)) {
4302                         g_warning ("wrong maximal instruction length of instruction %s (expected %d, got %d)",
4303                                    mono_inst_name (ins->opcode), max_len, code - cfg->native_code - offset);
4304                         g_assert_not_reached ();
4305                 }
4306
4307                 cpos += max_len;
4308
4309                 last_ins = ins;
4310                 last_offset = offset;
4311         }
4312
4313         cfg->code_len = code - cfg->native_code;
4314 }
4315
4316 /*========================= End of Function ========================*/
4317
4318 /*------------------------------------------------------------------*/
4319 /*                                                                  */
4320 /* Name         - mono_arch_register_lowlevel_calls                 */
4321 /*                                                                  */
4322 /* Function     - Register routines to help with --trace operation. */
4323 /*                                                                  */
4324 /*------------------------------------------------------------------*/
4325
4326 void
4327 mono_arch_register_lowlevel_calls (void)
4328 {
4329         mono_register_jit_icall (mono_arch_get_lmf_addr, "mono_arch_get_lmf_addr", NULL, TRUE);
4330 }
4331
4332 /*========================= End of Function ========================*/
4333
4334 /*------------------------------------------------------------------*/
4335 /*                                                                  */
4336 /* Name         - mono_arch_patch_code                              */
4337 /*                                                                  */
4338 /* Function     - Process the patch data created during the         */
4339 /*                instruction build process. This resolves jumps,   */
4340 /*                calls, variables etc.                             */
4341 /*                                                                  */
4342 /*------------------------------------------------------------------*/
4343
4344 void
4345 mono_arch_patch_code (MonoMethod *method, MonoDomain *domain,
4346                       guint8 *code, MonoJumpInfo *ji, gboolean run_cctors)
4347 {
4348         MonoJumpInfo *patch_info;
4349
4350         for (patch_info = ji; patch_info; patch_info = patch_info->next) {
4351                 unsigned char *ip = patch_info->ip.i + code;
4352                 gconstpointer target = NULL;
4353
4354                 target = mono_resolve_patch_target (method, domain, code,
4355                                                     patch_info, run_cctors);
4356
4357                 switch (patch_info->type) {
4358                         case MONO_PATCH_INFO_IP:
4359                         case MONO_PATCH_INFO_EXC_NAME:
4360                         case MONO_PATCH_INFO_LDSTR:
4361                         case MONO_PATCH_INFO_TYPE_FROM_HANDLE:
4362                         case MONO_PATCH_INFO_LDTOKEN:
4363                         case MONO_PATCH_INFO_EXC:
4364                                 continue;
4365                         case MONO_PATCH_INFO_SWITCH:
4366                                 /*----------------------------------*/
4367                                 /* ip points at the basr r13,0/j +4 */
4368                                 /* instruction the vtable value     */
4369                                 /* follows this (i.e. ip+6)         */
4370                                 /*----------------------------------*/
4371                                 *((gconstpointer *)(ip+6)) = target;
4372                                 target = NULL;
4373                                 continue;
4374                         case MONO_PATCH_INFO_METHODCONST:
4375                         case MONO_PATCH_INFO_CLASS:
4376                         case MONO_PATCH_INFO_IMAGE:
4377                         case MONO_PATCH_INFO_FIELD:
4378                         case MONO_PATCH_INFO_IID:
4379                                 target = S390_RELATIVE(target, ip);
4380                                 continue;
4381                         case MONO_PATCH_INFO_R4:
4382                         case MONO_PATCH_INFO_R8:
4383                         case MONO_PATCH_INFO_METHOD_REL:
4384                                 g_assert_not_reached ();
4385                                 continue;
4386                         default:
4387                                 target = S390_RELATIVE(target, ip);
4388                                 ip += 2;
4389                 }
4390                 s390_patch (ip, (guint32) target);
4391         }
4392 }
4393
4394 /*========================= End of Function ========================*/
4395
4396 /*------------------------------------------------------------------*/
4397 /*                                                                  */
4398 /* Name         - emit_load_volatile_registers                      */
4399 /*                                                                  */
4400 /* Function     - Create the instruction sequence for loading the   */
4401 /*                parameter registers for use with the 'tail' op.   */
4402 /*                                                                  */
4403 /*                The register loading operations performed here    */
4404 /*                are the mirror of the store operations performed  */
4405 /*                in mono_arch_emit_prolog and need to be kept in   */
4406 /*                synchronization with it.                          */
4407 /*                                                                  */
4408 /*------------------------------------------------------------------*/
4409
4410 guint8 *
4411 emit_load_volatile_registers (guint8 * code, MonoCompile *cfg)
4412 {
4413         MonoMethod *method = cfg->method;
4414         MonoMethodSignature *sig;
4415         MonoInst *inst;
4416         int pos, i;
4417         CallInfo *cinfo;
4418
4419         sig = mono_method_signature (method);
4420         pos = 0;
4421
4422         cinfo = get_call_info (cfg, cfg->mempool, sig, sig->pinvoke);
4423
4424         if (cinfo->struct_ret) {
4425                 ArgInfo *ainfo = &cinfo->ret;
4426                 inst         = cfg->vret_addr;
4427                 s390_l (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4428         }
4429
4430         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
4431                 ArgInfo *ainfo = cinfo->args + i;
4432                 inst = cfg->args [pos];
4433
4434                 if (inst->opcode == OP_REGVAR) {
4435                         if (ainfo->regtype == RegTypeGeneral)
4436                                 s390_lr (code, ainfo->reg, inst->dreg);
4437                         else if (ainfo->regtype == RegTypeFP) {
4438                                 if (inst->dreg != ainfo->reg) {
4439                                         if (ainfo->size == 4) {
4440                                                 s390_ldebr (code, ainfo->reg, inst->dreg);
4441                                         } else {
4442                                                 s390_ldr   (code, ainfo->reg, inst->dreg);
4443                                         }
4444                                 }
4445                         }
4446                         else if (ainfo->regtype == RegTypeBase) {
4447                         } else
4448                                 g_assert_not_reached ();
4449                 } else {
4450                         if (ainfo->regtype == RegTypeGeneral) {
4451                                 if (!((ainfo->reg >= 2) && (ainfo->reg <= 6)))
4452                                         g_assert_not_reached();
4453                                 switch (ainfo->size) {
4454                                 case 1:
4455                                         s390_ic (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4456                                         break;
4457                                 case 2:
4458                                         s390_lh (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4459                                         break;
4460                                 case 8:
4461                                         s390_lm (code, ainfo->reg, ainfo->reg + 1,
4462                                                   inst->inst_basereg, inst->inst_offset);
4463                                         break;
4464                                 default:
4465                                         s390_l  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4466                                 }
4467                         } else if (ainfo->regtype == RegTypeBase) {
4468                         } else if (ainfo->regtype == RegTypeFP) {
4469                                 if (ainfo->size == 8)
4470                                         s390_ld (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4471                                 else if (ainfo->size == 4)
4472                                         s390_le (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4473                                 else
4474                                         g_assert_not_reached ();
4475                         } else if (ainfo->regtype == RegTypeStructByVal) {
4476                                 if (ainfo->reg != STK_BASE) {
4477                                         switch (ainfo->size) {
4478                                         case 1:
4479                                                 s390_ic (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4480                                                 break;
4481                                         case 2:
4482                                                 s390_lh (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4483                                                 break;
4484                                         case 4:
4485                                                 s390_l  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4486                                                 break;
4487                                         case 8:
4488                                                 s390_lm (code, ainfo->reg, ainfo->reg+1, inst->inst_basereg, inst->inst_offset);
4489                                                 break;
4490                                         }
4491                                 }
4492                         } else if (ainfo->regtype == RegTypeStructByAddr) {
4493                                 if (ainfo->reg != STK_BASE) {
4494                                         s390_l  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4495                                 }
4496                         } else
4497                                 g_assert_not_reached ();
4498                 }
4499                 pos++;
4500         }
4501
4502         return code;
4503 }
4504
4505 /*========================= End of Function ========================*/
4506
4507 /*------------------------------------------------------------------*/
4508 /*                                                                  */
4509 /* Name         - mono_arch_emit_prolog                             */
4510 /*                                                                  */
4511 /* Function     - Create the instruction sequence for a function    */
4512 /*                prolog.                                           */
4513 /*                                                                  */
4514 /*------------------------------------------------------------------*/
4515
4516 guint8 *
4517 mono_arch_emit_prolog (MonoCompile *cfg)
4518 {
4519         MonoMethod *method = cfg->method;
4520         MonoBasicBlock *bb;
4521         MonoMethodSignature *sig;
4522         MonoInst *inst;
4523         int alloc_size, pos, max_offset, i;
4524         guint8 *code;
4525         CallInfo *cinfo;
4526         int tracing = 0;
4527         int lmfOffset;                                                          \
4528
4529         if (mono_jit_trace_calls != NULL && mono_trace_eval (method))
4530                 tracing = 1;
4531
4532         cfg->code_size   = 1024;
4533         cfg->native_code = code = g_malloc (cfg->code_size);
4534
4535         s390_stm  (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
4536
4537         if (cfg->arch.bkchain_reg != -1)
4538                 s390_lr (code, cfg->arch.bkchain_reg, STK_BASE);
4539
4540         if (cfg->flags & MONO_CFG_HAS_ALLOCA) {
4541                 cfg->used_int_regs |= 1 << 11;
4542         }
4543
4544         alloc_size = cfg->stack_offset;
4545
4546         cfg->stack_usage = alloc_size;
4547         s390_lr   (code, s390_r11, STK_BASE);
4548         if (s390_is_uimm16 (alloc_size)) {
4549                 s390_ahi  (code, STK_BASE, -alloc_size);
4550         } else {
4551                 int stackSize = alloc_size;
4552                 while (stackSize > 32767) {
4553                         s390_ahi  (code, STK_BASE, -32767);
4554                         stackSize -= 32767;
4555                 }
4556                 s390_ahi  (code, STK_BASE, -stackSize);
4557         }
4558         s390_st   (code, s390_r11, 0, STK_BASE, 0);
4559
4560         if (cfg->frame_reg != STK_BASE)
4561                 s390_lr (code, s390_r11, STK_BASE);
4562
4563         /* compute max_offset in order to use short forward jumps
4564          * we always do it on s390 because the immediate displacement
4565          * for jumps is too small
4566          */
4567         max_offset = 0;
4568         for (bb = cfg->bb_entry; bb; bb = bb->next_bb) {
4569                 MonoInst *ins = bb->code;
4570                 bb->max_offset = max_offset;
4571
4572                 if (cfg->prof_options & MONO_PROFILE_COVERAGE)
4573                         max_offset += 6;
4574
4575                 MONO_BB_FOR_EACH_INS (bb, ins)
4576                         max_offset += ((guint8 *)ins_get_spec (ins->opcode))[MONO_INST_LEN];
4577         }
4578
4579         /* load arguments allocated to register from the stack */
4580         sig = mono_method_signature (method);
4581         pos = 0;
4582
4583         cinfo = get_call_info (cfg, cfg->mempool, sig, sig->pinvoke);
4584
4585         if (cinfo->struct_ret) {
4586                 ArgInfo *ainfo = &cinfo->ret;
4587                 inst         = cfg->vret_addr;
4588                 inst->backend.size = ainfo->vtsize;
4589                 s390_st (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4590         }
4591
4592         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
4593                 ArgInfo *ainfo = cinfo->args + i;
4594                 inst = cfg->args [pos];
4595
4596                 if (inst->opcode == OP_VTARG_ADDR)
4597                         inst = inst->inst_left;
4598
4599                 if (inst->opcode == OP_REGVAR) {
4600                         if (ainfo->regtype == RegTypeGeneral)
4601                                 s390_lr (code, inst->dreg, ainfo->reg);
4602                         else if (ainfo->regtype == RegTypeFP) {
4603                                 if (inst->dreg != ainfo->reg) {
4604                                         if (ainfo->size == 4) {
4605                                                 s390_ledbr (code, inst->dreg, ainfo->reg);
4606                                         } else {
4607                                                 s390_ldr   (code, inst->dreg, ainfo->reg);
4608                                         }
4609                                 }
4610                         }
4611                         else if (ainfo->regtype == RegTypeBase) {
4612                                 s390_lr  (code, s390_r13, STK_BASE);
4613                                 s390_ahi (code, s390_r13, alloc_size);
4614                                 s390_l   (code, inst->dreg, 0, s390_r13, ainfo->offset);
4615                         } else
4616                                 g_assert_not_reached ();
4617
4618                         if (cfg->verbose_level > 2)
4619                                 g_print ("Argument %d assigned to register %s\n",
4620                                          pos, mono_arch_regname (inst->dreg));
4621                 } else {
4622                         if (ainfo->regtype == RegTypeGeneral) {
4623                                 if (!((ainfo->reg >= 2) && (ainfo->reg <= 6)))
4624                                         g_assert_not_reached();
4625                                 switch (ainfo->size) {
4626                                 case 1:
4627                                         s390_stc (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4628                                         break;
4629                                 case 2:
4630                                         s390_sth (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4631                                         break;
4632                                 case 8:
4633                                         s390_stm (code, ainfo->reg, ainfo->reg + 1,
4634                                                   inst->inst_basereg, inst->inst_offset);
4635                                         break;
4636                                 default:
4637                                         s390_st  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4638                                 }
4639                         } else if (ainfo->regtype == RegTypeBase) {
4640                         } else if (ainfo->regtype == RegTypeFP) {
4641                                 if (ainfo->size == 8)
4642                                         s390_std (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4643                                 else if (ainfo->size == 4)
4644                                         s390_ste (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4645                                 else
4646                                         g_assert_not_reached ();
4647                         } else if (ainfo->regtype == RegTypeStructByVal) {
4648                                 int doffset = inst->inst_offset;
4649                                 int reg;
4650                                 if (ainfo->reg != STK_BASE)
4651                                         reg = ainfo->reg;
4652                                 else {
4653                                         reg = s390_r0;
4654                                         s390_lr  (code, s390_r13, STK_BASE);
4655                                         s390_ahi (code, s390_r13, alloc_size);
4656                                 }
4657                                 switch (ainfo->size) {
4658                                         case 1:
4659                                                 if (ainfo->reg == STK_BASE)
4660                                                         s390_ic  (code, reg, 0, s390_r13, ainfo->offset+3);
4661                                                 s390_stc (code, reg, 0, inst->inst_basereg, doffset);
4662                                                 break;
4663                                         case 2:
4664                                                 if (ainfo->reg == STK_BASE)
4665                                                         s390_lh  (code, reg, 0, s390_r13, ainfo->offset+2);
4666                                                 s390_sth (code, reg, 0, inst->inst_basereg, doffset);
4667                                                 break;
4668                                         case 4:
4669                                                 if (ainfo->reg == STK_BASE)
4670                                                         s390_l   (code, reg, 0, s390_r13, ainfo->offset);
4671                                                 s390_st  (code, reg, 0, inst->inst_basereg, doffset);
4672                                                 break;
4673                                         case 8:
4674                                                 if (ainfo->reg == STK_BASE)
4675                                                         s390_lm  (code, s390_r0, s390_r1, s390_r13, ainfo->offset);
4676                                                 s390_stm (code, reg, reg+1, inst->inst_basereg, doffset);
4677                                                 break;
4678                                 }
4679                         } else if (ainfo->regtype == RegTypeStructByAddr) {
4680                                 if (ainfo->reg != STK_BASE)
4681                                         s390_st  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4682                         } else
4683                                 g_assert_not_reached ();
4684                 }
4685                 pos++;
4686         }
4687
4688         if (method->save_lmf) {
4689                 /*---------------------------------------------------------------*/
4690                 /* we build the MonoLMF structure on the stack - see mini-s390.h */
4691                 /*---------------------------------------------------------------*/
4692                 lmfOffset = alloc_size - sizeof(MonoLMF);
4693
4694                 s390_lr    (code, s390_r13, cfg->frame_reg);
4695                 if (s390_is_uimm16(lmfOffset))
4696                         s390_ahi   (code, s390_r13, lmfOffset);
4697                 else {
4698                         s390_basr (code, s390_r14, 0);
4699                         s390_j    (code, 4);
4700                         s390_word (code, lmfOffset);
4701                         s390_a    (code, s390_r13, 0, s390_r14, 4);
4702                 }
4703
4704                 /*---------------------------------------------------------------*/
4705                 /* Preserve the parameter registers while we fix up the lmf      */
4706                 /*---------------------------------------------------------------*/
4707                 s390_stm   (code, s390_r2, s390_r6, s390_r13,
4708                             G_STRUCT_OFFSET(MonoLMF, pregs[0]));
4709
4710                 /*---------------------------------------------------------------*/
4711                 /* On return from this call r2 have the address of the &lmf      */
4712                 /*---------------------------------------------------------------*/
4713                 mono_add_patch_info (cfg, code - cfg->native_code,
4714                                      MONO_PATCH_INFO_INTERNAL_METHOD,
4715                                      (gpointer)"mono_get_lmf_addr");
4716                 s390_brasl (code, s390_r14, 0);
4717
4718                 /*---------------------------------------------------------------*/
4719                 /* Set lmf.lmf_addr = jit_tls->lmf                               */
4720                 /*---------------------------------------------------------------*/
4721                 s390_st    (code, s390_r2, 0, s390_r13,
4722                             G_STRUCT_OFFSET(MonoLMF, lmf_addr));
4723
4724                 /*---------------------------------------------------------------*/
4725                 /* Get current lmf                                               */
4726                 /*---------------------------------------------------------------*/
4727                 s390_l     (code, s390_r0, 0, s390_r2, 0);
4728
4729                 /*---------------------------------------------------------------*/
4730                 /* Set our lmf as the current lmf                                */
4731                 /*---------------------------------------------------------------*/
4732                 s390_st    (code, s390_r13, 0, s390_r2, 0);
4733
4734                 /*---------------------------------------------------------------*/
4735                 /* Have our lmf.previous_lmf point to the last lmf               */
4736                 /*---------------------------------------------------------------*/
4737                 s390_st    (code, s390_r0, 0, s390_r13,
4738                             G_STRUCT_OFFSET(MonoLMF, previous_lmf));
4739
4740                 /*---------------------------------------------------------------*/
4741                 /* save method info                                              */
4742                 /*---------------------------------------------------------------*/
4743                 s390_basr  (code, s390_r1, 0);
4744                 s390_j     (code, 4);
4745                 s390_word  (code, method);
4746                 s390_l     (code, s390_r1, 0, s390_r1, 4);
4747                 s390_st    (code, s390_r1, 0, s390_r13,
4748                             G_STRUCT_OFFSET(MonoLMF, method));
4749
4750                 /*---------------------------------------------------------------*/
4751                 /* save the current IP                                           */
4752                 /*---------------------------------------------------------------*/
4753                 s390_st    (code, STK_BASE, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, ebp));
4754                 s390_basr  (code, s390_r1, 0);
4755                 s390_la    (code, s390_r1, 0, s390_r1, 0);
4756                 s390_st    (code, s390_r1, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, eip));
4757
4758                 /*---------------------------------------------------------------*/
4759                 /* Save general and floating point registers                     */
4760                 /*---------------------------------------------------------------*/
4761                 s390_stm   (code, s390_r2, s390_r12, s390_r13,
4762                             G_STRUCT_OFFSET(MonoLMF, gregs[2]));
4763                 for (i = 0; i < 16; i++) {
4764                         s390_std  (code, i, 0, s390_r13,
4765                                    G_STRUCT_OFFSET(MonoLMF, fregs[i]));
4766                 }
4767
4768                 /*---------------------------------------------------------------*/
4769                 /* Restore the parameter registers now that we've set up the lmf */
4770                 /*---------------------------------------------------------------*/
4771                 s390_lm    (code, s390_r2, s390_r6, s390_r13,
4772                             G_STRUCT_OFFSET(MonoLMF, pregs[0]));
4773         }
4774
4775         if (tracing)
4776                 code = mono_arch_instrument_prolog(cfg, enter_method, code, TRUE);
4777
4778         cfg->code_len = code - cfg->native_code;
4779
4780         g_assert (cfg->code_len < cfg->code_size);
4781
4782         return code;
4783 }
4784
4785 /*========================= End of Function ========================*/
4786
4787 /*------------------------------------------------------------------*/
4788 /*                                                                  */
4789 /* Name         - mono_arch_emit_epilog                             */
4790 /*                                                                  */
4791 /* Function     - Emit the instructions for a function epilog.      */
4792 /*                                                                  */
4793 /*------------------------------------------------------------------*/
4794
4795 void
4796 mono_arch_emit_epilog (MonoCompile *cfg)
4797 {
4798         MonoMethod *method = cfg->method;
4799         int tracing = 0;
4800         guint8 *code;
4801         int max_epilog_size = 96;
4802
4803         if (cfg->method->save_lmf)
4804                 max_epilog_size += 128;
4805
4806         if (mono_jit_trace_calls != NULL)
4807                 max_epilog_size += 128;
4808
4809         if (cfg->prof_options & MONO_PROFILE_ENTER_LEAVE)
4810                 max_epilog_size += 128;
4811
4812         while ((cfg->code_len + max_epilog_size) > (cfg->code_size - 16)) {
4813                 cfg->code_size  *= 2;
4814                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
4815                 mono_jit_stats.code_reallocs++;
4816         }
4817
4818         code = cfg->native_code + cfg->code_len;
4819
4820         if (mono_jit_trace_calls != NULL && mono_trace_eval (method)) {
4821                 code = mono_arch_instrument_epilog (cfg, leave_method, code, TRUE);
4822                 tracing = 1;
4823         }
4824
4825         if (method->save_lmf)
4826                 restoreLMF(code, cfg->frame_reg, cfg->stack_usage);
4827
4828         if (cfg->flags & MONO_CFG_HAS_ALLOCA)
4829                 s390_l (code, STK_BASE, 0, STK_BASE, 0);
4830         else
4831                 code = backUpStackPtr(cfg, code, STK_BASE);
4832
4833         s390_lm  (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
4834         s390_br  (code, s390_r14);
4835
4836         cfg->code_len = code - cfg->native_code;
4837
4838         g_assert (cfg->code_len < cfg->code_size);
4839
4840 }
4841
4842 /*========================= End of Function ========================*/
4843
4844 /*------------------------------------------------------------------*/
4845 /*                                                                  */
4846 /* Name         - mono_arch_emit_exceptions                         */
4847 /*                                                                  */
4848 /* Function     - Emit the blocks to handle exception conditions.   */
4849 /*                                                                  */
4850 /*------------------------------------------------------------------*/
4851
4852 void
4853 mono_arch_emit_exceptions (MonoCompile *cfg)
4854 {
4855         MonoJumpInfo    *patch_info;
4856         guint8          *code;
4857         int             nThrows = 0,
4858                         exc_count = 0,
4859                         iExc;
4860         guint32         code_size;
4861         MonoClass       *exc_classes [MAX_EXC];
4862         guint8          *exc_throw_start [MAX_EXC];
4863
4864         for (patch_info = cfg->patch_info;
4865              patch_info;
4866              patch_info = patch_info->next) {
4867                 if (patch_info->type == MONO_PATCH_INFO_EXC)
4868                         exc_count++;
4869         }
4870
4871         code_size = exc_count * 26;
4872
4873         while ((cfg->code_len + code_size) > (cfg->code_size - 16)) {
4874                 cfg->code_size  *= 2;
4875                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
4876                 mono_jit_stats.code_reallocs++;
4877         }
4878
4879         code = cfg->native_code + cfg->code_len;
4880
4881         /*---------------------------------------------------------------------*/
4882         /* Add code to raise exceptions                                        */
4883         /*---------------------------------------------------------------------*/
4884         for (patch_info = cfg->patch_info; patch_info; patch_info = patch_info->next) {
4885                 switch (patch_info->type) {
4886                 case MONO_PATCH_INFO_EXC: {
4887                         guint8 *ip = patch_info->ip.i + cfg->native_code;
4888                         MonoClass *exc_class;
4889                         guint32 throw_ip;
4890
4891                         /*-----------------------------------------------------*/
4892                         /* Patch the branch in epilog to come here             */
4893                         /*-----------------------------------------------------*/
4894                         s390_patch (ip + 2, (guint32) (S390_RELATIVE(code,ip)));
4895
4896                         exc_class = mono_class_from_name (mono_defaults.corlib,
4897                                                           "System",
4898                                                           patch_info->data.name);
4899                         g_assert (exc_class);
4900                         throw_ip = patch_info->ip.i;
4901
4902                         for (iExc = 0; iExc < nThrows; ++iExc)
4903                                 if (exc_classes [iExc] == exc_class)
4904                                         break;
4905
4906                         if (iExc < nThrows) {
4907                                 s390_jcl (code, S390_CC_UN, (guint32) exc_throw_start [iExc]);
4908                                 patch_info->type = MONO_PATCH_INFO_NONE;
4909                         } else {
4910
4911                                 if (nThrows < MAX_EXC) {
4912                                         exc_classes [nThrows]     = exc_class;
4913                                         exc_throw_start [nThrows] = code;
4914                                 }
4915
4916                                 /*---------------------------------------------*/
4917                                 /* Patch the parameter passed to the handler   */
4918                                 /*---------------------------------------------*/
4919                                 s390_basr (code, s390_r13, 0);
4920                                 s390_j    (code, 4);
4921                                 s390_word (code, patch_info->data.target);
4922                                 /*---------------------------------------------*/
4923                                 /* Load return address & parameter register    */
4924                                 /*---------------------------------------------*/
4925                                 s390_larl (code, s390_r14, (gsize)S390_RELATIVE((patch_info->ip.i +
4926                                                            cfg->native_code + 8), code));
4927                                 s390_l    (code, s390_r2, 0, s390_r13, 4);
4928                                 /*---------------------------------------------*/
4929                                 /* Reuse the current patch to set the jump     */
4930                                 /*---------------------------------------------*/
4931                                 patch_info->type      = MONO_PATCH_INFO_INTERNAL_METHOD;
4932                                 patch_info->data.name = "mono_arch_throw_exception_by_name";
4933                                 patch_info->ip.i      = code - cfg->native_code;
4934                                 s390_jcl  (code, S390_CC_UN, 0);
4935                         }
4936                         break;
4937                 }
4938                 default:
4939                         /* do nothing */
4940                         break;
4941                 }
4942         }
4943
4944         cfg->code_len = code - cfg->native_code;
4945
4946         g_assert (cfg->code_len < cfg->code_size);
4947
4948 }
4949
4950 /*========================= End of Function ========================*/
4951
4952 /*------------------------------------------------------------------*/
4953 /*                                                                  */
4954 /* Name         - mono_arch_setup_jit_tls_data                      */
4955 /*                                                                  */
4956 /* Function     - Setup the JIT's Thread Level Specific Data.       */
4957 /*                                                                  */
4958 /*------------------------------------------------------------------*/
4959
4960 void
4961 mono_arch_setup_jit_tls_data (MonoJitTlsData *tls)
4962 {
4963
4964         if (!tls_offset_inited) {
4965                 tls_offset_inited = TRUE;
4966
4967 #if HAVE_KW_THREAD
4968 # if 0
4969         __asm__ ("\tear\t%r1,0\n"
4970                  "\tlr\t%0,%3\n"
4971                  "\tsr\t%0,%r1\n"
4972                  "\tlr\t%1,%4\n"
4973                  "\tsr\t%1,%r1\n"
4974                  "\tlr\t%2,%5\n"
4975                  "\tsr\t%2,%r1\n"
4976                  : "=r" (appdomain_tls_offset),
4977                    "=r" (thread_tls_offset),
4978                    "=r" (lmf_tls_offset)
4979                  : "r" (&tls_appdomain),
4980                    "r" (&tls_current_object),
4981                    "r" (&mono_lmf_addr)
4982                  : "1", "cc");
4983 # endif
4984 #endif
4985         }
4986
4987         if (!lmf_addr_key_inited) {
4988                 lmf_addr_key_inited = TRUE;
4989                 pthread_key_create (&lmf_addr_key, NULL);
4990         }
4991         pthread_setspecific (lmf_addr_key, &tls->lmf);
4992
4993 }
4994
4995 /*========================= End of Function ========================*/
4996
4997 /*------------------------------------------------------------------*/
4998 /*                                                                  */
4999 /* Name         - mono_arch_free_jit_tls_data                       */
5000 /*                                                                  */
5001 /* Function     - Free tls data.                                    */
5002 /*                                                                  */
5003 /*------------------------------------------------------------------*/
5004
5005 void
5006 mono_arch_free_jit_tls_data (MonoJitTlsData *tls)
5007 {
5008 }
5009
5010 /*========================= End of Function ========================*/
5011
5012 /*------------------------------------------------------------------*/
5013 /*                                                                  */
5014 /* Name         - mono_arch_emit_inst_for_method                        */
5015 /*                                                                  */
5016 /*------------------------------------------------------------------*/
5017
5018 MonoInst*
5019 mono_arch_emit_inst_for_method (MonoCompile *cfg, MonoMethod *cmethod, MonoMethodSignature *fsig, MonoInst **args)
5020 {
5021         return NULL;
5022 }
5023
5024 /*========================= End of Function ========================*/
5025
5026 void
5027 mono_arch_decompose_opts (MonoCompile *cfg, MonoInst *ins)
5028 {
5029         switch (ins->opcode) {
5030         case OP_ISUB_OVF:
5031                 ins->opcode = OP_S390_ISUB_OVF;
5032                 break;
5033         case OP_ISUB_OVF_UN:
5034                 ins->opcode = OP_S390_ISUB_OVF_UN;
5035                 break;
5036         case OP_IADD_OVF:
5037                 ins->opcode = OP_S390_IADD_OVF;
5038                 break;
5039         case OP_IADD_OVF_UN:
5040                 ins->opcode = OP_S390_IADD_OVF_UN;
5041                 break;
5042         default:
5043                 break;
5044         }
5045 }
5046
5047 /*========================= End of Function ========================*/
5048
5049 /*------------------------------------------------------------------*/
5050 /*                                                                  */
5051 /* Name         - mono_arch_decompose_long_opts                         */
5052 /*                                                                  */
5053 /*------------------------------------------------------------------*/
5054
5055 void
5056 mono_arch_decompose_long_opts (MonoCompile *cfg, MonoInst *ins)
5057 {
5058         // The generic code seems to work for OP_LSUB fine on s390, why is a different
5059         // implementation needed ? gcc also seems to use the different implementation.
5060         // FIXME: What about the other OP_L opcodes below ?
5061
5062         switch (ins->opcode) {
5063         case OP_LADD_OVF:
5064         case OP_LADD_OVF_UN:
5065         case OP_LSUB_OVF:
5066         case OP_LSUB_OVF_UN: {
5067                 int opcode = 0;
5068
5069                 switch (ins->opcode) {
5070                 case OP_LADD:
5071                         opcode = OP_S390_LADD;
5072                         break;
5073                 case OP_LADD_OVF:
5074                         opcode = OP_S390_LADD_OVF;
5075                         break;
5076                 case OP_LADD_OVF_UN:
5077                         opcode = OP_S390_LADD_OVF_UN;
5078                         break;
5079                 case OP_LSUB:
5080                         opcode = OP_S390_LSUB;
5081                         break;
5082                 case OP_LSUB_OVF:
5083                         opcode = OP_S390_LSUB_OVF;
5084                         break;
5085                 case OP_LSUB_OVF_UN:
5086                         opcode = OP_S390_LSUB_OVF_UN;
5087                         break;
5088                 default:
5089                         g_assert_not_reached ();
5090                 }
5091
5092                 /* These hard regs make ssa crazy */
5093                 cfg->disable_ssa = TRUE;
5094                 MONO_EMIT_NEW_UNALU (cfg, OP_MOVE, s390_r0, ins->sreg1 + 1);
5095                 MONO_EMIT_NEW_UNALU (cfg, OP_MOVE, s390_r1, ins->sreg1 + 2);
5096                 MONO_EMIT_NEW_BIALU (cfg, opcode, ins->dreg, ins->sreg2 + 1, ins->sreg2 + 2);
5097                 NULLIFY_INS (ins);
5098                 break;
5099         }
5100         case OP_LADD_IMM: {
5101                 int dreg = mono_alloc_dreg (cfg, STACK_I8);
5102                 MONO_EMIT_NEW_I8CONST (cfg, dreg, ins->inst_l);
5103                 MONO_EMIT_NEW_BIALU (cfg, OP_LADD, ins->dreg, ins->sreg1, dreg);
5104                 NULLIFY_INS (ins);
5105                 break;
5106         }
5107         case OP_LSUB_IMM: {
5108                 int dreg = mono_alloc_dreg (cfg, STACK_I8);
5109                 MONO_EMIT_NEW_I8CONST (cfg, dreg, ins->inst_l);
5110                 MONO_EMIT_NEW_BIALU (cfg, OP_LSUB, ins->dreg, ins->sreg1, dreg);
5111                 NULLIFY_INS (ins);
5112                 break;
5113         }
5114         case OP_LNEG: {
5115                 MONO_EMIT_NEW_BIALU (cfg, OP_S390_LNEG, ins->dreg, ins->sreg1 + 1, ins->sreg1 + 2);
5116                 NULLIFY_INS (ins);
5117                 break;
5118         }
5119         case OP_ISUB_OVF:
5120                 ins->opcode = OP_S390_ISUB_OVF;
5121                 break;
5122         case OP_ISUB_OVF_UN:
5123                 ins->opcode = OP_S390_ISUB_OVF_UN;
5124                 break;
5125         default:
5126                 break;
5127         }
5128 }
5129
5130 /*========================= End of Function ========================*/
5131
5132 /*------------------------------------------------------------------*/
5133 /*                                                                  */
5134 /* Name         - mono_arch_print_tree                              */
5135 /*                                                                  */
5136 /* Function     - Print platform-specific opcode details.           */
5137 /*                                                                  */
5138 /* Returns      - 1 - opcode details have been printed              */
5139 /*                0 - opcode details have not been printed          */
5140 /*                                                                  */
5141 /*------------------------------------------------------------------*/
5142
5143 gboolean
5144 mono_arch_print_tree (MonoInst *tree, int arity)
5145 {
5146         gboolean done;
5147
5148         switch (tree->opcode) {
5149                 case OP_S390_LOADARG:
5150                 case OP_S390_ARGREG:
5151                 case OP_S390_ARGPTR:
5152                         printf ("[0x%lx(%s)]", tree->inst_offset,
5153                                 mono_arch_regname (tree->inst_basereg));
5154                         done = 1;
5155                         break;
5156                 case OP_S390_STKARG:
5157                         printf ("[0x%lx(previous_frame)]",
5158                                 tree->inst_offset);
5159                         done = 1;
5160                         break;
5161                 case OP_S390_MOVE:
5162                         printf ("[0x%lx(%d,%s),0x%lx(%s)]",
5163                                 tree->inst_offset, tree->backend.size,
5164                                 mono_arch_regname(tree->dreg), tree->inst_imm,
5165                                 mono_arch_regname(tree->sreg1));
5166                         done = 1;
5167                         break;
5168                 case OP_S390_SETF4RET:
5169                         printf ("[%s,%s]",
5170                                 mono_arch_fregname (tree->dreg),
5171                                 mono_arch_fregname (tree->sreg1));
5172                         done = 1;
5173                         break;
5174                 case OP_TLS_GET:
5175                         printf ("[0x%lx(0x%lx,%s)]", tree->inst_offset,
5176                                 tree->inst_imm,
5177                                 mono_arch_regname (tree->sreg1));
5178                         done = 1;
5179                         break;
5180                 case OP_S390_BKCHAIN:
5181                         printf ("[previous_frame(%s)]",
5182                                 mono_arch_regname (tree->sreg1));
5183                         done = 1;
5184                         break;
5185                 default:
5186                         done = 0;
5187         }
5188         return (done);
5189 }
5190
5191 /*========================= End of Function ========================*/
5192
5193 /*------------------------------------------------------------------*/
5194 /*                                                                  */
5195 /* Name         - mono_arch_regalloc_cost                           */
5196 /*                                                                  */
5197 /* Function     - Determine the cost, in the number of memory       */
5198 /*                references, of the action of allocating the var-  */
5199 /*                iable VMV into a register during global register  */
5200 /*                allocation.                                       */
5201 /*                                                                  */
5202 /* Returns      - Cost                                              */
5203 /*                                                                  */
5204 /*------------------------------------------------------------------*/
5205
5206 guint32
5207 mono_arch_regalloc_cost (MonoCompile *cfg, MonoMethodVar *vmv)
5208 {
5209         /* FIXME: */
5210         return 2;
5211 }
5212
5213 /*========================= End of Function ========================*/
5214
5215 /*------------------------------------------------------------------*/
5216 /*                                                                  */
5217 /* Name         - mono_arch_get_domain_intrinsic                    */
5218 /*                                                                  */
5219 /* Function     -                                                   */
5220 /*                                                                  */
5221 /* Returns      -                                                   */
5222 /*                                                                  */
5223 /*------------------------------------------------------------------*/
5224
5225 MonoInst *
5226 mono_arch_get_domain_intrinsic (MonoCompile* cfg)
5227 {
5228         MonoInst *ins;
5229
5230         if (appdomain_tls_offset == -1)
5231                 return NULL;
5232
5233         MONO_INST_NEW (cfg, ins, OP_TLS_GET);
5234         ins->inst_offset = appdomain_tls_offset;
5235         return (ins);
5236 }
5237
5238 /*========================= End of Function ========================*/
5239
5240 /*------------------------------------------------------------------*/
5241 /*                                                                  */
5242 /* Name         - mono_arch_get_thread_intrinsic                    */
5243 /*                                                                  */
5244 /* Function     -                                                   */
5245 /*                                                                  */
5246 /* Returns      -                                                   */
5247 /*                                                                  */
5248 /*------------------------------------------------------------------*/
5249
5250 MonoInst *
5251 mono_arch_get_thread_intrinsic (MonoCompile* cfg)
5252 {
5253         MonoInst *ins;
5254
5255         if (thread_tls_offset == -1)
5256                 return NULL;
5257
5258         MONO_INST_NEW (cfg, ins, OP_TLS_GET);
5259         ins->inst_offset = thread_tls_offset;
5260         return (ins);
5261 }
5262
5263 /*========================= End of Function ========================*/
5264
5265 /*------------------------------------------------------------------*/
5266 /*                                                                  */
5267 /* Name         - mono_arch_flush_register_windows                  */
5268 /*                                                                  */
5269 /* Function     -                                                   */
5270 /*                                                                  */
5271 /* Returns      -                                                   */
5272 /*                                                                  */
5273 /*------------------------------------------------------------------*/
5274
5275 void
5276 mono_arch_flush_register_windows (void)
5277 {
5278 }
5279
5280 /*========================= End of Function ========================*/
5281
5282 /*------------------------------------------------------------------*/
5283 /*                                                                  */
5284 /* Name         - mono_arch_get_lmf_addr                            */
5285 /*                                                                  */
5286 /* Function     -                                                   */
5287 /*                                                                  */
5288 /* Returns      -                                                   */
5289 /*                                                                  */
5290 /*------------------------------------------------------------------*/
5291
5292 gpointer
5293 mono_arch_get_lmf_addr (void)
5294 {
5295         return pthread_getspecific (lmf_addr_key);
5296 }
5297
5298
5299 /*========================= End of Function ========================*/
5300
5301 /*------------------------------------------------------------------*/
5302 /*                                                                  */
5303 /* Name         - mono_arch_get_patch_offset                        */
5304 /*                                                                  */
5305 /* Function     - Dummy entry point until s390x supports aot.       */
5306 /*                                                                  */
5307 /* Returns      - Offset for patch.                                 */
5308 /*                                                                  */
5309 /*------------------------------------------------------------------*/
5310
5311 guint32
5312 mono_arch_get_patch_offset (guint8 *code)
5313 {
5314         return 0;
5315 }
5316
5317 /*========================= End of Function ========================*/
5318
5319 gpointer
5320 mono_arch_context_get_int_reg (MonoContext *ctx, int reg)
5321 {
5322         /* FIXME: implement */
5323         g_assert_not_reached ();
5324         return NULL;
5325 }