mono/mini/mini-s390x.c

   1 /*------------------------------------------------------------------*/
   2 /*                                                                  */
   3 /* Name        - mini-s390.c                                        */
   4 /*                                                                  */
   5 /* Function    - S/390 backend for the Mono code generator.         */
   6 /*                                                                  */
   7 /* Name        - Neale Ferguson (Neale.Ferguson@SoftwareAG-usa.com) */
   8 /*                                                                  */
   9 /* Date        - January, 2004                                      */
  10 /*                                                                  */
  11 /* Derivation  - From mini-x86 & mini-ppc by -                      */
  12 /*               Paolo Molaro (lupus@ximian.com)                    */
  13 /*               Dietmar Maurer (dietmar@ximian.com)                */
  14 /*                                                                  */
  15 /*------------------------------------------------------------------*/
  16
  17 /*------------------------------------------------------------------*/
  18 /*                 D e f i n e s                                    */
  19 /*------------------------------------------------------------------*/
  20
  21 #define NOT_IMPLEMENTED(x) \
  22         g_error ("FIXME: %s is not yet implemented.", x);
  23
  24 #define EMIT_COND_BRANCH(ins,cond)                                                      \
  25 {                                                                                       \
  26 if (ins->flags & MONO_INST_BRLABEL) {                                                   \
  27         if (ins->inst_i0->inst_c0) {                                                    \
  28                 int displace;                                                           \
  29                 displace = ((cfg->native_code + ins->inst_i0->inst_c0) - code) / 2;     \
  30                 if (s390_is_imm16(displace)) {                                          \
  31                         s390_brc (code, cond, displace);                                \
  32                 } else {                                                                \
  33                         s390_jcl (code, cond, displace);                                \
  34                 }                                                                       \
  35         } else {                                                                        \
  36                 mono_add_patch_info (cfg, code - cfg->native_code,                      \
  37                                      MONO_PATCH_INFO_LABEL, ins->inst_i0);              \
  38                 s390_jcl (code, cond, 0);                                               \
  39         }                                                                               \
  40 } else {                                                                                \
  41         if (ins->inst_true_bb->native_offset) {                                         \
  42                 int displace;                                                           \
  43                 displace = ((cfg->native_code +                                         \
  44                             ins->inst_true_bb->native_offset) - code) / 2;              \
  45                 if (s390_is_imm16(displace)) {                                          \
  46                         s390_brc (code, cond, displace);                                \
  47                 } else {                                                                \
  48                         s390_jcl (code, cond, displace);                                \
  49                 }                                                                       \
  50         } else {                                                                        \
  51                 mono_add_patch_info (cfg, code - cfg->native_code,                      \
  52                                      MONO_PATCH_INFO_BB, ins->inst_true_bb);            \
  53                 s390_jcl (code, cond, 0);                                               \
  54         }                                                                               \
  55 }                                                                                       \
  56 }
  57
  58 #define EMIT_UNCOND_BRANCH(ins)                                                         \
  59 {                                                                                       \
  60 if (ins->flags & MONO_INST_BRLABEL) {                                                   \
  61         if (ins->inst_i0->inst_c0) {                                                    \
  62                 int displace;                                                           \
  63                 displace = ((cfg->native_code + ins->inst_i0->inst_c0) - code) / 2;     \
  64                 if (s390_is_imm16(displace)) {                                          \
  65                         s390_brc (code, S390_CC_UN, displace);                          \
  66                 } else {                                                                \
  67                         s390_jcl (code, S390_CC_UN, displace);                          \
  68                 }                                                                       \
  69         } else {                                                                        \
  70                 mono_add_patch_info (cfg, code - cfg->native_code,                      \
  71                                      MONO_PATCH_INFO_LABEL, ins->inst_i0);              \
  72                 s390_jcl (code, S390_CC_UN, 0);                                         \
  73         }                                                                               \
  74 } else {                                                                                \
  75         if (ins->inst_target_bb->native_offset) {                                       \
  76                 int displace;                                                           \
  77                 displace = ((cfg->native_code +                                         \
  78                             ins->inst_target_bb->native_offset) - code) / 2;            \
  79                 if (s390_is_imm16(displace)) {                                          \
  80                         s390_brc (code, S390_CC_UN, displace);                          \
  81                 } else {                                                                \
  82                         s390_jcl (code, S390_CC_UN, displace);                          \
  83                 }                                                                       \
  84         } else {                                                                        \
  85                 mono_add_patch_info (cfg, code - cfg->native_code,                      \
  86                                      MONO_PATCH_INFO_BB, ins->inst_target_bb);          \
  87                 s390_jcl (code, S390_CC_UN, 0);                                         \
  88         }                                                                               \
  89 }                                                                                       \
  90 }
  91
  92 #define EMIT_COND_SYSTEM_EXCEPTION(cond,exc_name)                       \
  93         do {                                                            \
  94                 mono_add_patch_info (cfg, code - cfg->native_code,      \
  95                                     MONO_PATCH_INFO_EXC, exc_name);     \
  96                 s390_jcl (code, cond, 0);                               \
  97         } while (0);
  98
  99 #define CHECK_SRCDST_COM                                                \
 100         if (ins->dreg == ins->sreg2) {                                  \
 101                 src2 = ins->sreg1;                                      \
 102         } else {                                                        \
 103                 src2 = ins->sreg2;                                      \
 104                 if (ins->dreg != ins->sreg1) {                          \
 105                         s390_lgr (code, ins->dreg, ins->sreg1);         \
 106                 }                                                       \
 107         }
 108
 109 #define CHECK_SRCDST_NCOM                                               \
 110         if (ins->dreg == ins->sreg2) {                                  \
 111                 src2 = s390_r13;                                        \
 112                 s390_lgr (code, s390_r13, ins->sreg2);                  \
 113         } else {                                                        \
 114                 src2 = ins->sreg2;                                      \
 115         }                                                               \
 116         if (ins->dreg != ins->sreg1) {                                  \
 117                 s390_lgr (code, ins->dreg, ins->sreg1);                 \
 118         }
 119
 120 #define CHECK_SRCDST_COM_I                                              \
 121         if (ins->dreg == ins->sreg2) {                                  \
 122                 src2 = ins->sreg1;                                      \
 123         } else {                                                        \
 124                 src2 = ins->sreg2;                                      \
 125                 if (ins->dreg != ins->sreg1) {                          \
 126                         s390_lgfr (code, ins->dreg, ins->sreg1);        \
 127                 }                                                       \
 128         }
 129
 130 #define CHECK_SRCDST_NCOM_I                                             \
 131         if (ins->dreg == ins->sreg2) {                                  \
 132                 src2 = s390_r13;                                        \
 133                 s390_lgfr (code, s390_r13, ins->sreg2);                 \
 134         } else {                                                        \
 135                 src2 = ins->sreg2;                                      \
 136         }                                                               \
 137         if (ins->dreg != ins->sreg1) {                                  \
 138                 s390_lgfr (code, ins->dreg, ins->sreg1);                \
 139         }
 140
 141 #define CHECK_SRCDST_COM_F                                              \
 142         if (ins->dreg == ins->sreg2) {                                  \
 143                 src2 = ins->sreg1;                                      \
 144         } else {                                                        \
 145                 src2 = ins->sreg2;                                      \
 146                 if (ins->dreg != ins->sreg1) {                          \
 147                         s390_ldr (code, ins->dreg, ins->sreg1);         \
 148                 }                                                       \
 149         }
 150
 151 #define CHECK_SRCDST_NCOM_F                                             \
 152         if (ins->dreg == ins->sreg2) {                                  \
 153                 src2 = s390_f15;                                        \
 154                 s390_ldr (code, s390_r13, ins->sreg2);                  \
 155         } else {                                                        \
 156                 src2 = ins->sreg2;                                      \
 157         }                                                               \
 158         if (ins->dreg != ins->sreg1) {                                  \
 159                 s390_ldr (code, ins->dreg, ins->sreg1);                 \
 160         }
 161
 162 #undef DEBUG
 163 #define DEBUG(a) if (cfg->verbose_level > 1) a
 164
 165 #define MAX_EXC 16
 166
 167 #define S390_TRACE_STACK_SIZE (5*sizeof(gpointer)+4*sizeof(gdouble))
 168
 169 #define MAX (a, b) ((a) > (b) ? (a) : (b))
 170
 171 /*========================= End of Defines =========================*/
 172
 173 /*------------------------------------------------------------------*/
 174 /*                 I n c l u d e s                                  */
 175 /*------------------------------------------------------------------*/
 176
 177 #include "mini.h"
 178 #include <string.h>
 179
 180 #include <mono/metadata/appdomain.h>
 181 #include <mono/metadata/debug-helpers.h>
 182 #include <mono/metadata/profiler-private.h>
 183 #include <mono/utils/mono-math.h>
 184
 185 #include "mini-s390x.h"
 186 #include "inssel.h"
 187 #include "cpu-s390x.h"
 188
 189 /*========================= End of Includes ========================*/
 190
 191 /*------------------------------------------------------------------*/
 192 /*                 T y p e d e f s                                  */
 193 /*------------------------------------------------------------------*/
 194
 195 typedef struct {
 196         guint stack_size,
 197               local_size,
 198               code_size,
 199               parm_size,
 200               offset,
 201               offStruct,
 202               retStruct;
 203 } size_data;
 204
 205 typedef enum {
 206         CMP_EQ,
 207         CMP_NE,
 208         CMP_LE,
 209         CMP_GE,
 210         CMP_LT,
 211         CMP_GT,
 212         CMP_LE_UN,
 213         CMP_GE_UN,
 214         CMP_LT_UN,
 215         CMP_GT_UN
 216 } CompRelation;
 217
 218 typedef enum {
 219         CMP_TYPE_L,
 220         CMP_TYPE_I,
 221         CMP_TYPE_F
 222 } CompType;
 223
 224 /*------------------------------------------------------------------*/
 225 /* Used by the instrument_emit_epilog                               */
 226 /*------------------------------------------------------------------*/
 227
 228 enum {
 229         SAVE_NONE,
 230         SAVE_STRUCT,
 231         SAVE_ONE,
 232         SAVE_TWO,
 233         SAVE_R4,
 234         SAVE_R8
 235 };
 236
 237 typedef struct InstList InstList;
 238
 239 struct InstList {
 240         InstList *prev;
 241         InstList *next;
 242         MonoInst *data;
 243 };
 244
 245 enum {
 246         RegTypeGeneral,
 247         RegTypeBase,
 248         RegTypeFP,
 249         RegTypeStructByVal,
 250         RegTypeStructByAddr
 251 };
 252
 253 typedef struct {
 254         gint32  offset;         /* offset from caller's stack */
 255         gint32  offparm;        /* offset from callee's stack */
 256         guint16 vtsize;         /* in param area */
 257         guint8  reg;
 258         guint8  regtype;        /* See RegType* */
 259         guint32 size;           /* Size of structure used by RegTypeStructByVal */
 260         gint32  type;           /* Data type of argument */
 261 } ArgInfo;
 262
 263 typedef struct {
 264         int nargs;
 265         guint32 stack_usage;
 266         guint32 struct_ret;
 267         ArgInfo ret;
 268         ArgInfo sigCookie;
 269         ArgInfo args [1];
 270 } CallInfo;
 271
 272 typedef struct {
 273         gint64  gr[5];          /* R2-R6                            */
 274         gdouble fp[3];          /* F0-F2                            */
 275 } __attribute__ ((packed)) RegParm;
 276
 277 /*========================= End of Typedefs ========================*/
 278
 279 /*------------------------------------------------------------------*/
 280 /*                   P r o t o t y p e s                            */
 281 /*------------------------------------------------------------------*/
 282
 283 static guint8 * emit_memcpy (guint8 *, int, int, int, int, int);
 284 static void indent (int);
 285 static guint8 * backUpStackPtr(MonoCompile *, guint8 *);
 286 static void decodeParm (MonoType *, void *, int);
 287 static void enter_method (MonoMethod *, RegParm *, char *);
 288 static void leave_method (MonoMethod *, ...);
 289 static gboolean is_regsize_var (MonoType *);
 290 static inline void add_general (guint *, size_data *, ArgInfo *);
 291 static inline void add_stackParm (guint *, size_data *, ArgInfo *, gint);
 292 static inline void add_float (guint *, size_data *, ArgInfo *);
 293 static CallInfo * calculate_sizes (MonoMethodSignature *, size_data *, gboolean);
 294 static void peephole_pass (MonoCompile *, MonoBasicBlock *);
 295 static guchar * emit_float_to_int (MonoCompile *, guchar *, int, int, int, gboolean);
 296 static void mono_arch_break(void);
 297 gpointer mono_arch_get_lmf_addr (void);
 298 static guint8 * emit_load_volatile_registers (guint8 *, MonoCompile *);
 299 static CompRelation opcode_to_cond (int);
 300
 301 /*========================= End of Prototypes ======================*/
 302
 303 /*------------------------------------------------------------------*/
 304 /*                 G l o b a l   V a r i a b l e s                  */
 305 /*------------------------------------------------------------------*/
 306
 307 int mono_exc_esp_offset = 0;
 308
 309 static int indent_level = 0;
 310
 311 static const char*const * ins_spec = s390x_cpu_desc;
 312
 313 static gboolean tls_offset_inited = FALSE;
 314
 315 static int appdomain_tls_offset = -1,
 316            lmf_tls_offset = -1,
 317            thread_tls_offset = -1;
 318
 319 pthread_key_t lmf_addr_key;
 320
 321 gboolean lmf_addr_key_inited = FALSE;
 322
 323 #if 0
 324
 325 extern __thread MonoDomain *tls_appdomain;
 326 extern __thread MonoThread *tls_current_object;
 327 extern __thread gpointer   mono_lmf_addr;
 328
 329 #endif
 330
 331 /*====================== End of Global Variables ===================*/
 332
 333 /*------------------------------------------------------------------*/
 334 /*                                                                  */
 335 /* Name         - mono_arch_regname                                 */
 336 /*                                                                  */
 337 /* Function     - Returns the name of the register specified by     */
 338 /*                the input parameter.                              */
 339 /*                                                                  */
 340 /*------------------------------------------------------------------*/
 341
 342 const char*
 343 mono_arch_regname (int reg) {
 344         static const char * rnames[] = {
 345                 "s390_r0", "s390_sp", "s390_r2", "s390_r3", "s390_r4",
 346                 "s390_r5", "s390_r6", "s390_r7", "s390_r8", "s390_r9",
 347                 "s390_r10", "s390_r11", "s390_r12", "s390_r13", "s390_r14",
 348                 "s390_r15"
 349         };
 350
 351         if (reg >= 0 && reg < 16)
 352                 return rnames [reg];
 353         else
 354                 return "unknown";
 355 }
 356
 357 /*========================= End of Function ========================*/
 358
 359 /*------------------------------------------------------------------*/
 360 /*                                                                  */
 361 /* Name         - mono_arch_fregname                                */
 362 /*                                                                  */
 363 /* Function     - Returns the name of the register specified by     */
 364 /*                the input parameter.                              */
 365 /*                                                                  */
 366 /*------------------------------------------------------------------*/
 367
 368 const char*
 369 mono_arch_fregname (int reg) {
 370         static const char * rnames[] = {
 371                 "s390_f0", "s390_f1", "s390_f2", "s390_f3", "s390_f4",
 372                 "s390_f5", "s390_f6", "s390_f7", "s390_f8", "s390_f9",
 373                 "s390_f10", "s390_f11", "s390_f12", "s390_f13", "s390_f14",
 374                 "s390_f15"
 375         };
 376
 377         if (reg >= 0 && reg < 16)
 378                 return rnames [reg];
 379         else
 380                 return "unknown";
 381 }
 382
 383 /*========================= End of Function ========================*/
 384
 385 /*------------------------------------------------------------------*/
 386 /*                                                                  */
 387 /* Name         - emit_memcpy                                       */
 388 /*                                                                  */
 389 /* Function     - Emit code to move from memory-to-memory based on  */
 390 /*                the size of the variable. r0 is overwritten.      */
 391 /*                                                                  */
 392 /*------------------------------------------------------------------*/
 393
 394 static guint8 *
 395 emit_memcpy (guint8 *code, int size, int dreg, int doffset, int sreg, int soffset)
 396 {
 397         switch (size) {
 398                 case 4 :
 399                         s390_ly  (code, s390_r0, 0, sreg, soffset);
 400                         s390_sty (code, s390_r0, 0, dreg, doffset);
 401                         break;
 402
 403                 case 3 :
 404                         s390_icmy  (code, s390_r0, 14, sreg, soffset);
 405                         s390_stcmy (code, s390_r0, 14, dreg, doffset);
 406                         break;
 407
 408                 case 2 :
 409                         s390_lhy  (code, s390_r0, 0, sreg, soffset);
 410                         s390_sthy (code, s390_r0, 0, dreg, doffset);
 411                         break;
 412
 413                 case 1 :
 414                         s390_icy  (code, s390_r0, 0, sreg, soffset);
 415                         s390_stcy (code, s390_r0, 0, dreg, doffset);
 416                         break;
 417
 418                 default :
 419                         while (size > 0) {
 420                                 int len;
 421
 422                                 if (size > 256)
 423                                         len = 256;
 424                                 else
 425                                         len = size;
 426                                 s390_mvc (code, len, dreg, doffset, sreg, soffset);
 427                                 size -= len;
 428                         }
 429         }
 430         return code;
 431 }
 432
 433 /*========================= End of Function ========================*/
 434
 435 /*------------------------------------------------------------------*/
 436 /*                                                                  */
 437 /* Name         - arch_get_argument_info                            */
 438 /*                                                                  */
 439 /* Function     - Gathers information on parameters such as size,   */
 440 /*                alignment, and padding. arg_info should be large  */
 441 /*                enough to hold param_count + 1 entries.           */
 442 /*                                                                  */
 443 /* Parameters   - @csig - Method signature                          */
 444 /*                @param_count - No. of parameters to consider      */
 445 /*                @arg_info - An array to store the result info     */
 446 /*                                                                  */
 447 /* Returns      - Size of the activation frame                      */
 448 /*                                                                  */
 449 /*------------------------------------------------------------------*/
 450
 451 int
 452 mono_arch_get_argument_info (MonoMethodSignature *csig,
 453                              int param_count,
 454                              MonoJitArgumentInfo *arg_info)
 455 {
 456         int k, frame_size = 0;
 457         int size, align, pad;
 458         int offset = 8;
 459
 460         if (MONO_TYPE_ISSTRUCT (csig->ret)) {
 461                 frame_size += sizeof (gpointer);
 462                 offset += 8;
 463         }
 464
 465         arg_info [0].offset = offset;
 466
 467         if (csig->hasthis) {
 468                 frame_size += sizeof (gpointer);
 469                 offset += 8;
 470         }
 471
 472         arg_info [0].size = frame_size;
 473
 474         for (k = 0; k < param_count; k++) {
 475
 476                 if (csig->pinvoke)
 477                         size = mono_type_native_stack_size (csig->params [k], &align);
 478                 else
 479                         size = mono_type_stack_size (csig->params [k], &align);
 480
 481                 frame_size += pad = (align - (frame_size & (align - 1))) & (align - 1);
 482                 arg_info [k].pad = pad;
 483                 frame_size += size;
 484                 arg_info [k + 1].pad = 0;
 485                 arg_info [k + 1].size = size;
 486                 offset += pad;
 487                 arg_info [k + 1].offset = offset;
 488                 offset += size;
 489         }
 490
 491         align = MONO_ARCH_FRAME_ALIGNMENT;
 492         frame_size += pad = (align - (frame_size & (align - 1))) & (align - 1);
 493         arg_info [k].pad = pad;
 494
 495         return frame_size;
 496 }
 497
 498 /*========================= End of Function ========================*/
 499
 500 /*------------------------------------------------------------------*/
 501 /*                                                                  */
 502 /* Name         - retFitsInReg.                                     */
 503 /*                                                                  */
 504 /* Function     - Determines if a value can be returned in one or   */
 505 /*                two registers.                                    */
 506 /*                                                                  */
 507 /*------------------------------------------------------------------*/
 508
 509 static inline gboolean
 510 retFitsInReg(guint32 size)
 511 {
 512         switch (size) {
 513                 case 0:
 514                 case 1:
 515                 case 2:
 516                 case 4:
 517                 case 8:
 518                         return (TRUE);
 519                 break;
 520                 default:
 521                         return (FALSE);
 522         }
 523 }
 524
 525 /*========================= End of Function ========================*/
 526
 527 /*------------------------------------------------------------------*/
 528 /*                                                                  */
 529 /* Name         - backStackPtr.                                     */
 530 /*                                                                  */
 531 /* Function     - Restore Stack Pointer to previous frame.          */
 532 /*                                                                  */
 533 /*------------------------------------------------------------------*/
 534
 535 static inline guint8 *
 536 backUpStackPtr(MonoCompile *cfg, guint8 *code)
 537 {
 538         int stackSize = cfg->stack_usage;
 539
 540         if (s390_is_uimm16 (stackSize)) {
 541                 s390_aghi  (code, STK_BASE, stackSize);
 542         } else {
 543                 while (stackSize > 32767) {
 544                         s390_aghi  (code, STK_BASE, 32767);
 545                         stackSize -= 32767;
 546                 }
 547                 s390_aghi  (code, STK_BASE, stackSize);
 548         }
 549         return (code);
 550 }
 551
 552 /*========================= End of Function ========================*/
 553
 554 /*------------------------------------------------------------------*/
 555 /*                                                                  */
 556 /* Name         - indent                                            */
 557 /*                                                                  */
 558 /* Function     - Perform nice indenting to current level           */
 559 /*                                                                  */
 560 /*------------------------------------------------------------------*/
 561
 562 static void
 563 indent (int diff) {
 564         int v;
 565         if (diff < 0)
 566                 indent_level += diff;
 567         v = indent_level;
 568         printf("[%3d] ",v);
 569         while (v-- > 0) {
 570                 printf (". ");
 571         }
 572         if (diff > 0)
 573                 indent_level += diff;
 574 }
 575
 576 /*========================= End of Function ========================*/
 577
 578 /*------------------------------------------------------------------*/
 579 /*                                                                  */
 580 /* Name         - decodeParm                                        */
 581 /*                                                                  */
 582 /* Function     - Decode a parameter for the trace.                 */
 583 /*                                                                  */
 584 /*------------------------------------------------------------------*/
 585
 586 static void
 587 decodeParm(MonoType *type, void *curParm, int size)
 588 {
 589         guint32 simpleType;
 590
 591         if (type->byref) {
 592                 printf("[BYREF:%p], ", *((char **) curParm));
 593         } else {
 594                 simpleType = mono_type_get_underlying_type(type)->type;
 595 enum_parmtype:
 596                 switch (simpleType) {
 597                         case MONO_TYPE_I :
 598                                 printf ("[INTPTR:%p], ", *((int **) curParm));
 599                                 break;
 600                         case MONO_TYPE_U :
 601                                 printf ("[UINTPTR:%p], ", *((int **) curParm));
 602                                 break;
 603                         case MONO_TYPE_BOOLEAN :
 604                                 printf ("[BOOL:%ld], ", *((gint64 *) curParm));
 605                                 break;
 606                         case MONO_TYPE_CHAR :
 607                                 printf ("[CHAR:%c], ", *((gint64  *) curParm));
 608                                 break;
 609                         case MONO_TYPE_I1 :
 610                                 printf ("[INT1:%ld], ", *((gint64 *) curParm));
 611                                 break;
 612                         case MONO_TYPE_I2 :
 613                                 printf ("[INT2:%ld], ", *((gint64 *) curParm));
 614                                 break;
 615                         case MONO_TYPE_I4 :
 616                                 printf ("[INT4:%ld], ", *((gint64 *) curParm));
 617                                 break;
 618                         case MONO_TYPE_U1 :
 619                                 printf ("[UINT1:%lu], ", *((guint64 *) curParm));
 620                                 break;
 621                         case MONO_TYPE_U2 :
 622                                 printf ("[UINT2:%lu], ", *((guint64 *) curParm));
 623                                 break;
 624                         case MONO_TYPE_U4 :
 625                                 printf ("[UINT4:%lu], ", *((guint64 *) curParm));
 626                                 break;
 627                         case MONO_TYPE_U8 :
 628                                 printf ("[UINT8:%lu], ", *((guint64 *) curParm));
 629                                 break;
 630                         case MONO_TYPE_STRING : {
 631                                 MonoString *s = *((MonoString **) curParm);
 632                                 if (s) {
 633                                         g_assert (((MonoObject *) s)->vtable->klass == mono_defaults.string_class);
 634                                         printf("[STRING:%p:%s], ", s, mono_string_to_utf8(s));
 635                                 } else {
 636                                         printf("[STRING:null], ");
 637                                 }
 638                                 break;
 639                         }
 640                         case MONO_TYPE_CLASS :
 641                         case MONO_TYPE_OBJECT : {
 642                                 MonoObject *obj = *((MonoObject **) curParm);
 643                                 MonoClass *class;
 644                                 if ((obj) && (obj->vtable)) {
 645                                         printf("[CLASS/OBJ:");
 646                                         class = obj->vtable->klass;
 647                                         printf("%p [%p] ",obj,curParm);
 648                                         if (class == mono_defaults.string_class) {
 649                                                 printf("[STRING:%p:%s]",
 650                                                        *obj, mono_string_to_utf8 (obj));
 651                                         } else if (class == mono_defaults.int32_class) {
 652                                                 printf("[INT32:%p:%d]",
 653                                                         obj, *(gint32 *)((char *)obj + sizeof (MonoObject)));
 654                                         } else
 655                                                 printf("[%s.%s:%p]",
 656                                                        class->name_space, class->name, obj);
 657                                         printf("], ");
 658                                 } else {
 659                                         printf("[OBJECT:null], ");
 660                                 }
 661                                 break;
 662                         }
 663                         case MONO_TYPE_PTR :
 664                                 printf("[PTR:%p], ", *((gpointer **) (curParm)));
 665                                 break;
 666                         case MONO_TYPE_FNPTR :
 667                                 printf("[FNPTR:%p], ", *((gpointer **) (curParm)));
 668                                 break;
 669                         case MONO_TYPE_ARRAY :
 670                                 printf("[ARRAY:%p], ", *((gpointer **) (curParm)));
 671                                 break;
 672                         case MONO_TYPE_SZARRAY :
 673                                 printf("[SZARRAY:%p], ", *((gpointer **) (curParm)));
 674                                 break;
 675                         case MONO_TYPE_I8 :
 676                                 printf("[INT8:%ld], ", *((gint64 *) (curParm)));
 677                                 break;
 678                         case MONO_TYPE_R4 :
 679                                 printf("[FLOAT4:%g], ", *((float *) (curParm)));
 680                                 break;
 681                         case MONO_TYPE_R8 :
 682                                 printf("[FLOAT8:%g], ", *((double *) (curParm)));
 683                                 break;
 684                         case MONO_TYPE_VALUETYPE : {
 685                                 int i;
 686                                 MonoMarshalType *info;
 687
 688                                 if (type->data.klass->enumtype) {
 689                                         simpleType = type->data.klass->enum_basetype->type;
 690                                         printf("{VALUETYPE} - ");
 691                                         goto enum_parmtype;
 692                                 }
 693
 694                                 info = mono_marshal_load_type_info (type->data.klass);
 695
 696                                 if ((info->native_size == sizeof(float)) &&
 697                                     (info->num_fields  == 1) &&
 698                                     (info->fields[0].field->type->type == MONO_TYPE_R4)) {
 699                                                 printf("[FLOAT4:%f], ", *((float *) (curParm)));
 700                                         break;
 701                                 }
 702
 703                                 if ((info->native_size == sizeof(double)) &&
 704                                     (info->num_fields  == 1) &&
 705                                     (info->fields[0].field->type->type == MONO_TYPE_R8)) {
 706                                         printf("[FLOAT8:%g], ", *((double *) (curParm)));
 707                                         break;
 708                                 }
 709
 710                                 printf("[VALUETYPE:");
 711                                 for (i = 0; i < size; i++)
 712                                         printf("%02x,", *((guint8 *)curParm+i));
 713                                 printf("]");
 714                                 break;
 715                         }
 716                         case MONO_TYPE_TYPEDBYREF: {
 717                                 int i;
 718                                 printf("[TYPEDBYREF:");
 719                                 for (i = 0; i < size; i++)
 720                                         printf("%02x,", *((guint8 *)curParm+i));
 721                                 printf("]");
 722                                 break;
 723                         }
 724                         default :
 725                                 printf("[?? - %d], ",simpleType);
 726                 }
 727         }
 728 }
 729
 730 /*========================= End of Function ========================*/
 731
 732 static int lc = 0;
 733 /*------------------------------------------------------------------*/
 734 /*                                                                  */
 735 /* Name         - enter_method                                      */
 736 /*                                                                  */
 737 /* Function     - Perform tracing of the entry to the current       */
 738 /*                method.                                           */
 739 /*                                                                  */
 740 /*------------------------------------------------------------------*/
 741
 742 static void
 743 enter_method (MonoMethod *method, RegParm *rParm, char *sp)
 744 {
 745         int i, oParm = 0, iParm = 0;
 746         MonoClass *class;
 747         MonoObject *obj;
 748         MonoMethodSignature *sig;
 749         char *fname;
 750         guint64 ip;
 751         CallInfo *cinfo;
 752         ArgInfo *ainfo;
 753         size_data sz;
 754         void *curParm;
 755
 756
 757 lc++;
 758 if (lc > 500000) {
 759 fseek(stdout, 0L, SEEK_SET);
 760 lc = 0;
 761 }
 762         fname = mono_method_full_name (method, TRUE);
 763         indent (1);
 764         printf ("ENTER: %s ", fname);
 765         g_free (fname);
 766
 767         ip  = (*(guint64 *) (sp+S390_RET_ADDR_OFFSET));
 768         printf ("ip: %p sp: %p - ", (gpointer) ip, sp);
 769
 770         if (rParm == NULL)
 771                 return;
 772
 773         sig = mono_method_signature (method);
 774
 775         cinfo = calculate_sizes (sig, &sz, sig->pinvoke);
 776
 777         if (cinfo->struct_ret) {
 778                 printf ("[STRUCTRET:%p], ", (gpointer) rParm->gr[0]);
 779                 iParm = 1;
 780         }
 781
 782         if (sig->hasthis) {
 783                 gpointer *this = (gpointer *) rParm->gr[iParm];
 784                 obj = (MonoObject *) this;
 785                 if (method->klass->valuetype) {
 786                         if (obj) {
 787                                 printf("this:[value:%p:%016lx], ",
 788                                        this, *((guint64 *)(this+sizeof(MonoObject))));
 789                         } else
 790                                 printf ("this:[NULL], ");
 791                 } else {
 792                         if (obj) {
 793 //                              class = obj->vtable->klass;
 794 //                              if (class == mono_defaults.string_class) {
 795 //                                      printf ("this:[STRING:%p:%s], ",
 796 //                                              obj, mono_string_to_utf8 ((MonoString *)obj));
 797 //                              } else {
 798 //                                      printf ("this:%p[%s.%s], ",
 799 //                                              obj, class->name_space, class->name);
 800 //                              }
 801 printf("this:%p, ",obj);
 802                         } else
 803                                 printf ("this:NULL, ");
 804                 }
 805                 oParm++;
 806         }
 807
 808         for (i = 0; i < sig->param_count; ++i) {
 809                 ainfo = &cinfo->args[i + oParm];
 810                 switch (ainfo->regtype) {
 811                         case RegTypeGeneral :
 812                                 decodeParm(sig->params[i], &(rParm->gr[ainfo->reg-2]), ainfo->size);
 813                                 break;
 814                         case RegTypeFP :
 815                                 decodeParm(sig->params[i], &(rParm->fp[ainfo->reg]), ainfo->size);
 816                                 break;
 817                         case RegTypeBase :
 818                                 decodeParm(sig->params[i], sp+ainfo->offset, ainfo->size);
 819                                 break;
 820                         case RegTypeStructByVal :
 821                                 if (ainfo->reg != STK_BASE)
 822                                         curParm = &(rParm->gr[ainfo->reg-2]);
 823                                 else
 824                                         curParm = sp+ainfo->offset;
 825
 826                                 if (retFitsInReg (ainfo->vtsize))
 827                                         decodeParm(sig->params[i],
 828                                                    curParm,
 829                                                    ainfo->size);
 830                                 else
 831                                         decodeParm(sig->params[i],
 832                                                    *((char **) curParm),
 833                                                    ainfo->vtsize);
 834                                 break;
 835                         case RegTypeStructByAddr :
 836                                 if (ainfo->reg != STK_BASE)
 837                                         curParm = &(rParm->gr[ainfo->reg-2]);
 838                                 else
 839                                         curParm = sp+ainfo->offset;
 840
 841                                 decodeParm(sig->params[i],
 842                                            *((char **) curParm),
 843                                            ainfo->vtsize);
 844                                 break;
 845
 846                         default :
 847                                 printf("???, ");
 848                 }
 849         }
 850         printf("\n");
 851         g_free(cinfo);
 852 }
 853
 854 /*========================= End of Function ========================*/
 855
 856 /*------------------------------------------------------------------*/
 857 /*                                                                  */
 858 /* Name         - leave_method                                      */
 859 /*                                                                  */
 860 /* Function     -                                                   */
 861 /*                                                                  */
 862 /*------------------------------------------------------------------*/
 863
 864 static void
 865 leave_method (MonoMethod *method, ...)
 866 {
 867         MonoType *type;
 868         char *fname;
 869         guint64 ip;
 870         va_list ap;
 871
 872         va_start(ap, method);
 873
 874         fname = mono_method_full_name (method, TRUE);
 875         indent (-1);
 876         printf ("LEAVE: %s", fname);
 877         g_free (fname);
 878
 879         type = mono_method_signature (method)->ret;
 880
 881 handle_enum:
 882         switch (type->type) {
 883         case MONO_TYPE_VOID:
 884                 break;
 885         case MONO_TYPE_BOOLEAN: {
 886                 int val = va_arg (ap, int);
 887                 if (val)
 888                         printf ("[TRUE:%d]", val);
 889                 else
 890                         printf ("[FALSE]");
 891
 892                 break;
 893         }
 894         case MONO_TYPE_CHAR: {
 895                 int val = va_arg (ap, int);
 896                 printf ("[CHAR:%d]", val);
 897                 break;
 898         }
 899         case MONO_TYPE_I1: {
 900                 int val = va_arg (ap, int);
 901                 printf ("[INT1:%d]", val);
 902                 break;
 903         }
 904         case MONO_TYPE_U1: {
 905                 int val = va_arg (ap, int);
 906                 printf ("[UINT1:%d]", val);
 907                 break;
 908         }
 909         case MONO_TYPE_I2: {
 910                 int val = va_arg (ap, int);
 911                 printf ("[INT2:%d]", val);
 912                 break;
 913         }
 914         case MONO_TYPE_U2: {
 915                 int val = va_arg (ap, int);
 916                 printf ("[UINT2:%d]", val);
 917                 break;
 918         }
 919         case MONO_TYPE_I4: {
 920                 int val = va_arg (ap, int);
 921                 printf ("[INT4:%d]", val);
 922                 break;
 923         }
 924         case MONO_TYPE_U4: {
 925                 int val = va_arg (ap, int);
 926                 printf ("[UINT4:%d]", val);
 927                 break;
 928         }
 929         case MONO_TYPE_I: {
 930                 gint64 val = va_arg (ap, gint64);
 931                 printf ("[INT:%ld]", val);
 932                 printf("]");
 933                 break;
 934         }
 935         case MONO_TYPE_U: {
 936                 gint64 val = va_arg (ap, gint64);
 937                 printf ("[UINT:%lu]", val);
 938                 printf("]");
 939                 break;
 940         }
 941         case MONO_TYPE_STRING: {
 942                 MonoString *s = va_arg (ap, MonoString *);
 943 ;
 944                 if (s) {
 945                         g_assert (((MonoObject *)s)->vtable->klass == mono_defaults.string_class);
 946                         printf ("[STRING:%p:%s]", s, mono_string_to_utf8 (s));
 947                 } else
 948                         printf ("[STRING:null], ");
 949                 break;
 950         }
 951         case MONO_TYPE_CLASS:
 952         case MONO_TYPE_OBJECT: {
 953                 MonoObject *o = va_arg (ap, MonoObject *);
 954
 955                 if ((o) && (o->vtable)) {
 956                         if (o->vtable->klass == mono_defaults.boolean_class) {
 957                                 printf ("[BOOLEAN:%p:%d]", o, *((guint8 *)o + sizeof (MonoObject)));
 958                         } else if  (o->vtable->klass == mono_defaults.int32_class) {
 959                                 printf ("[INT32:%p:%d]", o, *((gint32 *)((char *)o + sizeof (MonoObject))));
 960                         } else if  (o->vtable->klass == mono_defaults.int64_class) {
 961                                 printf ("[INT64:%p:%ld]", o, *((gint64 *)((char *)o + sizeof (MonoObject))));
 962                         } else
 963                                 printf ("[%s.%s:%p]", o->vtable->klass->name_space, o->vtable->klass->name, o);
 964                 } else
 965                         printf ("[OBJECT:%p]", o);
 966
 967                 break;
 968         }
 969         case MONO_TYPE_PTR:
 970         case MONO_TYPE_FNPTR:
 971         case MONO_TYPE_ARRAY:
 972         case MONO_TYPE_SZARRAY: {
 973                 gpointer p = va_arg (ap, gpointer);
 974                 printf ("[result=%p]", p);
 975                 break;
 976         }
 977         case MONO_TYPE_I8: {
 978                 gint64 l =  va_arg (ap, gint64);
 979                 printf ("[LONG:%ld]", l);
 980                 break;
 981         }
 982         case MONO_TYPE_U8: {
 983                 guint64 l =  va_arg (ap, guint64);
 984                 printf ("[ULONG:%lu]", l);
 985                 break;
 986         }
 987         case MONO_TYPE_R4: {
 988                 double f = va_arg (ap, double);
 989                 printf ("[FLOAT4:%g]\n", f);
 990                 break;
 991         }
 992         case MONO_TYPE_R8: {
 993                 double f = va_arg (ap, double);
 994                 printf ("[FLOAT8:%g]\n", f);
 995                 break;
 996         }
 997         case MONO_TYPE_VALUETYPE: {
 998                 MonoMarshalType *info;
 999                 if (type->data.klass->enumtype) {
1000                         type = type->data.klass->enum_basetype;
1001                         goto handle_enum;
1002                 } else {
1003                         guint8 *p = va_arg (ap, gpointer);
1004                         int j, size, align;
1005
1006                         info = mono_marshal_load_type_info (type->data.klass);
1007
1008                         if ((info->native_size == sizeof(float)) &&
1009                             (info->num_fields  == 1) &&
1010                             (info->fields[0].field->type->type == MONO_TYPE_R4)) {
1011                                 double f = va_arg (ap, double);
1012                                 printf("[FLOAT4:%g]\n", (double) f);
1013                                 break;
1014                         }
1015
1016                         if ((info->native_size == sizeof(double)) &&
1017                             (info->num_fields  == 1) &&
1018                             (info->fields[0].field->type->type == MONO_TYPE_R8)) {
1019                                 double f = va_arg (ap, double);
1020                                 printf("[FLOAT8:%g]\n", f);
1021                                 break;
1022                         }
1023
1024                         size = mono_type_size (type, &align);
1025                         switch (size) {
1026                         case 1:
1027                         case 2:
1028                         case 4:
1029                         case 8:
1030                                 printf ("[");
1031                                 for (j = 0; p && j < size; j++)
1032                                         printf ("%02x,", p [j]);
1033                                 printf ("]\n");
1034                                 break;
1035                         default:
1036                                 printf ("[VALUETYPE]\n");
1037                         }
1038                 }
1039                 break;
1040         }
1041         case MONO_TYPE_TYPEDBYREF: {
1042                 guint8 *p = va_arg (ap, gpointer);
1043                 int j, size, align;
1044                 size = mono_type_size (type, &align);
1045                 switch (size) {
1046                 case 1:
1047                 case 2:
1048                 case 4:
1049                 case 8:
1050                         printf ("[");
1051                         for (j = 0; p && j < size; j++)
1052                                 printf ("%02x,", p [j]);
1053                         printf ("]\n");
1054                         break;
1055                 default:
1056                         printf ("[TYPEDBYREF]\n");
1057                 }
1058         }
1059                 break;
1060         default:
1061                 printf ("(unknown return type %x)",
1062                         mono_method_signature (method)->ret->type);
1063         }
1064
1065         ip = ((gint64) __builtin_return_address (0));
1066         printf (" ip: %p\n", (gpointer) ip);
1067 }
1068
1069 /*========================= End of Function ========================*/
1070
1071 /*------------------------------------------------------------------*/
1072 /*                                                                  */
1073 /* Name         - mono_arch_cpu_init                                */
1074 /*                                                                  */
1075 /* Function     - Perform CPU specific initialization to execute    */
1076 /*                managed code.                                     */
1077 /*                                                                  */
1078 /*------------------------------------------------------------------*/
1079
1080 void
1081 mono_arch_cpu_init (void)
1082 {
1083         guint mode = 1;
1084
1085         /*--------------------------------------*/
1086         /* Set default rounding mode for FP     */
1087         /*--------------------------------------*/
1088         __asm__ ("SRNM\t%0\n\t"
1089                 : : "m" (mode));
1090 }
1091
1092 /*========================= End of Function ========================*/
1093
1094 /*------------------------------------------------------------------*/
1095 /*                                                                  */
1096 /* Name         - mono_arch_cpu_optimizazions                       */
1097 /*                                                                  */
1098 /* Function     - Returns the optimizations supported on this CPU   */
1099 /*                                                                  */
1100 /*------------------------------------------------------------------*/
1101
1102 guint32
1103 mono_arch_cpu_optimizazions (guint32 *exclude_mask)
1104 {
1105         guint32 opts = 0;
1106
1107         /*----------------------------------------------------------*/
1108         /* no s390-specific optimizations yet                       */
1109         /*----------------------------------------------------------*/
1110         *exclude_mask = MONO_OPT_INLINE|MONO_OPT_LINEARS;
1111 //      *exclude_mask = MONO_OPT_INLINE;
1112         return opts;
1113 }
1114
1115 /*========================= End of Function ========================*/
1116
1117 /*------------------------------------------------------------------*/
1118 /*                                                                  */
1119 /* Name         -                                                   */
1120 /*                                                                  */
1121 /* Function     -                                                   */
1122 /*                                                                  */
1123 /*------------------------------------------------------------------*/
1124
1125 static gboolean
1126 is_regsize_var (MonoType *t) {
1127         if (t->byref)
1128                 return TRUE;
1129         switch (mono_type_get_underlying_type (t)->type) {
1130         case MONO_TYPE_I4:
1131         case MONO_TYPE_U4:
1132         case MONO_TYPE_I:
1133         case MONO_TYPE_I8:
1134         case MONO_TYPE_U8:
1135         case MONO_TYPE_U:
1136                 return TRUE;
1137         case MONO_TYPE_OBJECT:
1138         case MONO_TYPE_STRING:
1139         case MONO_TYPE_CLASS:
1140         case MONO_TYPE_SZARRAY:
1141         case MONO_TYPE_ARRAY:
1142                 return FALSE;
1143         case MONO_TYPE_VALUETYPE:
1144                 if (t->data.klass->enumtype)
1145                         return is_regsize_var (t->data.klass->enum_basetype);
1146                 return FALSE;
1147         }
1148         return FALSE;
1149 }
1150
1151 /*========================= End of Function ========================*/
1152
1153 /*------------------------------------------------------------------*/
1154 /*                                                                  */
1155 /* Name         - mono_arch_get_allocatable_int_vars                */
1156 /*                                                                  */
1157 /* Function     -                                                   */
1158 /*                                                                  */
1159 /*------------------------------------------------------------------*/
1160
1161 GList *
1162 mono_arch_get_allocatable_int_vars (MonoCompile *cfg)
1163 {
1164         GList *vars = NULL;
1165         int i;
1166
1167         for (i = 0; i < cfg->num_varinfo; i++) {
1168                 MonoInst *ins = cfg->varinfo [i];
1169                 MonoMethodVar *vmv = MONO_VARINFO (cfg, i);
1170
1171                 /* unused vars */
1172                 if (vmv->range.first_use.abs_pos >= vmv->range.last_use.abs_pos)
1173                         continue;
1174
1175                 if (ins->flags & (MONO_INST_VOLATILE|MONO_INST_INDIRECT) ||
1176                     (ins->opcode != OP_LOCAL && ins->opcode != OP_ARG))
1177                         continue;
1178
1179                 /* we can only allocate 32 bit values */
1180                 if (is_regsize_var (ins->inst_vtype)) {
1181                         g_assert (MONO_VARINFO (cfg, i)->reg == -1);
1182                         g_assert (i == vmv->idx);
1183                         vars = mono_varlist_insert_sorted (cfg, vars, vmv, FALSE);
1184                 }
1185         }
1186
1187         return vars;
1188 }
1189
1190 /*========================= End of Function ========================*/
1191
1192 /*------------------------------------------------------------------*/
1193 /*                                                                  */
1194 /* Name         - mono_arch_global_int_regs                         */
1195 /*                                                                  */
1196 /* Function     - Return a list of usable integer registers.        */
1197 /*                                                                  */
1198 /*------------------------------------------------------------------*/
1199
1200 GList *
1201 mono_arch_get_global_int_regs (MonoCompile *cfg)
1202 {
1203         GList *regs = NULL;
1204         MonoMethodHeader *header;
1205         int i, top = 13;
1206
1207         header = mono_method_get_header (cfg->method);
1208         if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
1209                 cfg->frame_reg = s390_r11;
1210
1211         for (i = 8; i < top; ++i) {
1212                 if (cfg->frame_reg != i)
1213                         regs = g_list_prepend (regs, GUINT_TO_POINTER (i));
1214         }
1215
1216         return regs;
1217 }
1218
1219 /*========================= End of Function ========================*/
1220
1221 /*------------------------------------------------------------------*/
1222 /*                                                                  */
1223 /* Name         -  mono_arch_flush_icache                           */
1224 /*                                                                  */
1225 /* Function     -  Flush the CPU icache.                            */
1226 /*                                                                  */
1227 /*------------------------------------------------------------------*/
1228
1229 void
1230 mono_arch_flush_icache (guint8 *code, gint size)
1231 {
1232 }
1233
1234 /*========================= End of Function ========================*/
1235
1236 /*------------------------------------------------------------------*/
1237 /*                                                                  */
1238 /* Name         - add_general                                       */
1239 /*                                                                  */
1240 /* Function     - Determine code and stack size incremements for a  */
1241 /*                parameter.                                        */
1242 /*                                                                  */
1243 /*------------------------------------------------------------------*/
1244
1245 static void inline
1246 add_general (guint *gr, size_data *sz, ArgInfo *ainfo)
1247 {
1248         if (*gr > S390_LAST_ARG_REG) {
1249                 sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1250                 ainfo->offset   = sz->stack_size;
1251                 ainfo->reg      = STK_BASE;
1252                 ainfo->regtype  = RegTypeBase;
1253                 sz->stack_size += sizeof(long);
1254                 sz->local_size += sizeof(long);
1255                 sz->offStruct  += sizeof(long);
1256                 sz->code_size  += 12;
1257         } else {
1258                 ainfo->reg      = *gr;
1259                 sz->code_size  += 8;
1260         }
1261         (*gr) ++;
1262 }
1263
1264 /*========================= End of Function ========================*/
1265
1266 /*------------------------------------------------------------------*/
1267 /*                                                                  */
1268 /* Name         - add_stackParm                                     */
1269 /*                                                                  */
1270 /* Function     - Determine code and stack size incremements for a  */
1271 /*                parameter.                                        */
1272 /*                                                                  */
1273 /*------------------------------------------------------------------*/
1274
1275 static void inline
1276 add_stackParm (guint *gr, size_data *sz, ArgInfo *ainfo, gint size)
1277 {
1278         if (*gr > S390_LAST_ARG_REG) {
1279                 sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1280                 ainfo->reg      = STK_BASE;
1281                 sz->stack_size += sizeof(gpointer);
1282                 sz->offStruct  += sizeof(gpointer);
1283         } else {
1284                 ainfo->reg      = *gr;
1285         }
1286         (*gr) ++;
1287         ainfo->offset   = sz->stack_size;
1288         ainfo->offparm  = sz->offset;
1289         sz->offset      = S390_ALIGN(sz->offset+size, sizeof(long));
1290         ainfo->size     = size;
1291         ainfo->regtype  = RegTypeStructByAddr;
1292         ainfo->vtsize   = size;
1293         sz->parm_size  += size;
1294 }
1295
1296 /*========================= End of Function ========================*/
1297
1298 /*------------------------------------------------------------------*/
1299 /*                                                                  */
1300 /* Name         - add_float                                         */
1301 /*                                                                  */
1302 /* Function     - Determine code and stack size incremements for a  */
1303 /*                float parameter.                                  */
1304 /*                                                                  */
1305 /*------------------------------------------------------------------*/
1306
1307 static void inline
1308 add_float (guint *fr,  size_data *sz, ArgInfo *ainfo)
1309 {
1310         if ((*fr) <= S390_LAST_FPARG_REG) {
1311                 ainfo->regtype = RegTypeFP;
1312                 ainfo->reg     = *fr;
1313                 sz->code_size += 4;
1314                 (*fr) += 2;
1315         }
1316         else {
1317                 ainfo->offset   = sz->stack_size;
1318                 ainfo->reg      = STK_BASE;
1319                 ainfo->regtype  = RegTypeBase;
1320                 sz->code_size  += 4;
1321                 sz->stack_size += sizeof(double);
1322                 sz->local_size += sizeof(double);
1323                 sz->offStruct  += sizeof(double);
1324         }
1325 }
1326
1327 /*========================= End of Function ========================*/
1328
1329 /*------------------------------------------------------------------*/
1330 /*                                                                  */
1331 /* Name         - calculate_sizes                                   */
1332 /*                                                                  */
1333 /* Function     - Determine the amount of space required for code   */
1334 /*                and stack. In addition determine starting points  */
1335 /*                for stack-based parameters, and area for struct-  */
1336 /*                ures being returned on the stack.                 */
1337 /*                                                                  */
1338 /*------------------------------------------------------------------*/
1339
1340 static CallInfo *
1341 calculate_sizes (MonoMethodSignature *sig, size_data *sz,
1342                  gboolean string_ctor)
1343 {
1344         guint i, fr, gr, size;
1345         int nParm = sig->hasthis + sig->param_count;
1346         guint32 simpletype, align;
1347         CallInfo *cinfo = g_malloc0 (sizeof (CallInfo) + sizeof (ArgInfo) * nParm);
1348
1349         fr                = 0;
1350         gr                = s390_r2;
1351         nParm             = 0;
1352         cinfo->struct_ret = 0;
1353         sz->retStruct     = 0;
1354         sz->offset        = 0;
1355         sz->offStruct     = S390_MINIMAL_STACK_SIZE;
1356         sz->stack_size    = S390_MINIMAL_STACK_SIZE;
1357         sz->code_size     = 0;
1358         sz->parm_size     = 0;
1359         sz->local_size    = 0;
1360
1361         /*----------------------------------------------------------*/
1362         /* We determine the size of the return code/stack in case we*/
1363         /* need to reserve a register to be used to address a stack */
1364         /* area that the callee will use.                           */
1365         /*----------------------------------------------------------*/
1366
1367         simpletype = mono_type_get_underlying_type (sig->ret)->type;
1368 enum_retvalue:
1369         switch (simpletype) {
1370                 case MONO_TYPE_BOOLEAN:
1371                 case MONO_TYPE_I1:
1372                 case MONO_TYPE_U1:
1373                 case MONO_TYPE_I2:
1374                 case MONO_TYPE_U2:
1375                 case MONO_TYPE_CHAR:
1376                 case MONO_TYPE_I4:
1377                 case MONO_TYPE_U4:
1378                 case MONO_TYPE_I:
1379                 case MONO_TYPE_U:
1380                 case MONO_TYPE_CLASS:
1381                 case MONO_TYPE_OBJECT:
1382                 case MONO_TYPE_SZARRAY:
1383                 case MONO_TYPE_ARRAY:
1384                 case MONO_TYPE_PTR:
1385                 case MONO_TYPE_FNPTR:
1386                 case MONO_TYPE_STRING:
1387                         cinfo->ret.reg = s390_r2;
1388                         sz->code_size += 4;
1389                         break;
1390                 case MONO_TYPE_R4:
1391                 case MONO_TYPE_R8:
1392                         cinfo->ret.reg = s390_f0;
1393                         sz->code_size += 4;
1394                         break;
1395                 case MONO_TYPE_I8:
1396                 case MONO_TYPE_U8:
1397                         cinfo->ret.reg = s390_r2;
1398                         sz->code_size += 4;
1399                         break;
1400                 case MONO_TYPE_VALUETYPE: {
1401                         MonoClass *klass = mono_class_from_mono_type (sig->ret);
1402                         if (sig->ret->data.klass->enumtype) {
1403                                 simpletype = sig->ret->data.klass->enum_basetype->type;
1404                                 goto enum_retvalue;
1405                         }
1406                         if (sig->pinvoke)
1407                                 size = mono_class_native_size (klass, &align);
1408                         else
1409                                 size = mono_class_value_size (klass, &align);
1410
1411                         cinfo->ret.reg    = s390_r2;
1412                         cinfo->struct_ret = 1;
1413                         cinfo->ret.size   = size;
1414                         cinfo->ret.vtsize = size;
1415                         gr++;
1416                         break;
1417                 }
1418                 case MONO_TYPE_TYPEDBYREF:
1419                         size = sizeof (MonoTypedRef);
1420                         cinfo->ret.reg    = s390_r2;
1421                         cinfo->struct_ret = 1;
1422                         cinfo->ret.size   = size;
1423                         cinfo->ret.vtsize = size;
1424                         gr++;
1425                         break;
1426                 case MONO_TYPE_VOID:
1427                         break;
1428                 default:
1429                         g_error ("Can't handle as return value 0x%x", sig->ret->type);
1430         }
1431
1432         if (sig->hasthis) {
1433                 cinfo->args[nParm].size = sizeof(gpointer);
1434                 add_general (&gr, sz, cinfo->args+nParm);
1435                 nParm++;
1436         }
1437
1438         /*----------------------------------------------------------*/
1439         /* We determine the size of the parameter code and stack    */
1440         /* requirements by checking the types and sizes of the      */
1441         /* parameters.                                              */
1442         /*----------------------------------------------------------*/
1443
1444         for (i = 0; i < sig->param_count; ++i) {
1445                 /*--------------------------------------------------*/
1446                 /* Handle vararg type calls. All args are put on    */
1447                 /* the stack.                                       */
1448                 /*--------------------------------------------------*/
1449                 if ((sig->call_convention == MONO_CALL_VARARG) &&
1450                     (i == sig->sentinelpos)) {
1451                         gr = S390_LAST_ARG_REG + 1;
1452                         add_general (&gr, sz, &cinfo->sigCookie);
1453                 }
1454
1455                 if (sig->params [i]->byref) {
1456                         add_general (&gr, sz, cinfo->args+nParm);
1457                         cinfo->args[nParm].size = sizeof(gpointer);
1458                         nParm++;
1459                         continue;
1460                 }
1461
1462                 simpletype = mono_type_get_underlying_type(sig->params [i])->type;
1463                 cinfo->args[nParm].type = simpletype;
1464                 switch (simpletype) {
1465                 case MONO_TYPE_BOOLEAN:
1466                 case MONO_TYPE_I1:
1467                 case MONO_TYPE_U1:
1468                         cinfo->args[nParm].size = sizeof(char);
1469                         add_general (&gr, sz, cinfo->args+nParm);
1470                         nParm++;
1471                         break;
1472                 case MONO_TYPE_I2:
1473                 case MONO_TYPE_U2:
1474                 case MONO_TYPE_CHAR:
1475                         cinfo->args[nParm].size = sizeof(short);
1476                         add_general (&gr, sz, cinfo->args+nParm);
1477                         nParm++;
1478                         break;
1479                 case MONO_TYPE_I4:
1480                 case MONO_TYPE_U4:
1481                         cinfo->args[nParm].size = sizeof(int);
1482                         add_general (&gr, sz, cinfo->args+nParm);
1483                         nParm++;
1484                         break;
1485                 case MONO_TYPE_I:
1486                 case MONO_TYPE_U:
1487                 case MONO_TYPE_PTR:
1488                 case MONO_TYPE_FNPTR:
1489                 case MONO_TYPE_CLASS:
1490                 case MONO_TYPE_OBJECT:
1491                 case MONO_TYPE_STRING:
1492                 case MONO_TYPE_SZARRAY:
1493                 case MONO_TYPE_ARRAY:
1494                         cinfo->args[nParm].size = sizeof(gpointer);
1495                         add_general (&gr, sz, cinfo->args+nParm);
1496                         nParm++;
1497                         break;
1498                 case MONO_TYPE_I8:
1499                 case MONO_TYPE_U8:
1500                         cinfo->args[nParm].size = sizeof(long long);
1501                         add_general (&gr, sz, cinfo->args+nParm);
1502                         nParm++;
1503                         break;
1504                 case MONO_TYPE_R4:
1505                         cinfo->args[nParm].size = sizeof(float);
1506                         add_float (&fr, sz, cinfo->args+nParm);
1507                         nParm++;
1508                         break;
1509                 case MONO_TYPE_R8:
1510                         cinfo->args[nParm].size = sizeof(double);
1511                         add_float (&fr, sz, cinfo->args+nParm);
1512                         nParm++;
1513                         break;
1514                 case MONO_TYPE_VALUETYPE: {
1515                         MonoMarshalType *info;
1516                         MonoClass *klass = mono_class_from_mono_type (sig->params [i]);
1517                         if (sig->pinvoke)
1518                                 size = mono_class_native_size (klass, &align);
1519                         else
1520                                 size = mono_class_value_size (klass, &align);
1521
1522                         info = mono_marshal_load_type_info (klass);
1523
1524                         if ((info->native_size == sizeof(float)) &&
1525                             (info->num_fields  == 1) &&
1526                             (info->fields[0].field->type->type == MONO_TYPE_R4)) {
1527                                 cinfo->args[nParm].size = sizeof(float);
1528                                 add_float(&fr, sz, cinfo->args+nParm);
1529                                 break;
1530                         }
1531
1532                         if ((info->native_size == sizeof(double)) &&
1533                             (info->num_fields  == 1) &&
1534                             (info->fields[0].field->type->type == MONO_TYPE_R8)) {
1535                                 cinfo->args[nParm].size = sizeof(double);
1536                                 add_float(&fr, sz, cinfo->args+nParm);
1537                                 break;
1538                         }
1539
1540                         cinfo->args[nParm].vtsize  = 0;
1541                         cinfo->args[nParm].size    = 0;
1542
1543                         switch (size) {
1544                                 /*----------------------------------*/
1545                                 /* On S/390, structures of size 1,  */
1546                                 /* 2, 4, and 8 bytes are passed in  */
1547                                 /* (a) register(s).                 */
1548                                 /*----------------------------------*/
1549                                 case 0:
1550                                 case 1:
1551                                 case 2:
1552                                 case 4:
1553                                 case 8:
1554                                         add_general(&gr, sz, cinfo->args+nParm);
1555                                         cinfo->args[nParm].size    = size;
1556                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1557                                         nParm++;
1558                                         sz->local_size            += sizeof(long);
1559                                         break;
1560                                 default:
1561                                         add_stackParm(&gr, sz, cinfo->args+nParm, size);
1562                                         nParm++;
1563                         }
1564                 }
1565                         break;
1566                 case MONO_TYPE_TYPEDBYREF: {
1567                         int size = sizeof (MonoTypedRef);
1568
1569                         cinfo->args[nParm].vtsize  = 0;
1570                         cinfo->args[nParm].size    = 0;
1571
1572                         switch (size) {
1573                                 /*----------------------------------*/
1574                                 /* On S/390, structures of size 1,  */
1575                                 /* 2, 4, and 8 bytes are passed in  */
1576                                 /* (a) register(s).                 */
1577                                 /*----------------------------------*/
1578                                 case 0:
1579                                 case 1:
1580                                 case 2:
1581                                 case 4:
1582                                 case 8:
1583                                         add_general(&gr, sz, cinfo->args+nParm);
1584                                         cinfo->args[nParm].size    = size;
1585                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1586                                         nParm++;
1587                                         sz->local_size            += sizeof(long);
1588                                         break;
1589                                 default:
1590                                         add_stackParm(&gr, sz, cinfo->args+nParm, size);
1591                                         nParm++;
1592                         }
1593                 }
1594                         break;
1595                 default:
1596                         g_error ("Can't trampoline 0x%x", sig->params [i]->type);
1597                 }
1598         }
1599
1600         /*----------------------------------------------------------*/
1601         /* If we are passing a structure back then if it won't be   */
1602         /* in a register(s) then we make room at the end of the     */
1603         /* parameters that may have been placed on the stack        */
1604         /*----------------------------------------------------------*/
1605         if (cinfo->struct_ret) {
1606                 cinfo->ret.offset = sz->stack_size;
1607                 switch (cinfo->ret.size) {
1608                 case 0:
1609                 case 1:
1610                 case 2:
1611                 case 4:
1612                 case 8:
1613                         break;
1614                 default:
1615                         sz->stack_size   += S390_ALIGN(cinfo->ret.size, align);
1616                 }
1617         }
1618
1619         sz->stack_size  = sz->stack_size + sz->local_size + sz->parm_size +
1620                           sz->offset;
1621         sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1622
1623         return (cinfo);
1624 }
1625
1626 /*========================= End of Function ========================*/
1627
1628 /*------------------------------------------------------------------*/
1629 /*                                                                  */
1630 /* Name         - mono_arch_allocate_vars                           */
1631 /*                                                                  */
1632 /* Function     - Set var information according to the calling      */
1633 /*                convention for S/390. The local var stuff should  */
1634 /*                most likely be split in another method.           */
1635 /*                                                                  */
1636 /* Parameter    - @m - Compile unit.                                */
1637 /*                                                                  */
1638 /*------------------------------------------------------------------*/
1639
1640 void
1641 mono_arch_allocate_vars (MonoCompile *cfg)
1642 {
1643         MonoMethodSignature *sig;
1644         MonoMethodHeader *header;
1645         MonoInst *inst;
1646         CallInfo *cinfo;
1647         size_data sz;
1648         int iParm, iVar, offset, size, align, curinst;
1649         int frame_reg = STK_BASE;
1650         int sArg, eArg;
1651
1652         header  = mono_method_get_header (cfg->method);
1653
1654         cfg->flags |= MONO_CFG_HAS_SPILLUP;
1655
1656         /*---------------------------------------------------------*/
1657         /* We use the frame register also for any method that has  */
1658         /* filter clauses. This way, when the handlers are called, */
1659         /* the code will reference local variables using the frame */
1660         /* reg instead of the stack pointer: if we had to restore  */
1661         /* the stack pointer, we'd corrupt the method frames that  */
1662         /* are already on the stack (since filters get called      */
1663         /* before stack unwinding happens) when the filter code    */
1664         /* would call any method.                                  */
1665         /*---------------------------------------------------------*/
1666         if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
1667                 frame_reg = s390_r11;
1668
1669         cfg->frame_reg = frame_reg;
1670
1671         if (frame_reg != STK_BASE)
1672                 cfg->used_int_regs |= 1 << frame_reg;
1673
1674         sig     = mono_method_signature (cfg->method);
1675
1676         cinfo   = calculate_sizes (sig, &sz, sig->pinvoke);
1677
1678         if (cinfo->struct_ret) {
1679                 cfg->ret->opcode = OP_REGVAR;
1680                 cfg->ret->inst_c0 = s390_r2;
1681         } else {
1682                 switch (mono_type_get_underlying_type (sig->ret)->type) {
1683                 case MONO_TYPE_VOID:
1684                         break;
1685                 default:
1686                         cfg->ret->opcode = OP_REGVAR;
1687                         cfg->ret->dreg   = s390_r2;
1688                         break;
1689                 }
1690         }
1691
1692         /*--------------------------------------------------------------*/
1693         /* local vars are at a positive offset from the stack pointer   */
1694         /* also note that if the function uses alloca, we use s390_r11  */
1695         /* to point at the local variables.                             */
1696         /* add parameter area size for called functions                 */
1697         /*--------------------------------------------------------------*/
1698         offset          = (cfg->param_area + S390_MINIMAL_STACK_SIZE);
1699         cfg->sig_cookie = 0;
1700
1701         if (cinfo->struct_ret) {
1702                 inst               = cfg->ret;
1703                 offset             = S390_ALIGN(offset, sizeof(gpointer));
1704                 inst->inst_offset  = offset;
1705                 inst->opcode       = OP_REGOFFSET;
1706                 inst->inst_basereg = frame_reg;
1707                 offset            += sizeof(gpointer);
1708                 if ((sig->call_convention == MONO_CALL_VARARG) &&
1709                     (!retFitsInReg (cinfo->ret.size)))
1710                         cfg->sig_cookie += cinfo->ret.size;
1711         }
1712
1713         if (sig->hasthis) {
1714                 inst = cfg->varinfo [0];
1715                 if (inst->opcode != OP_REGVAR) {
1716                         inst->opcode       = OP_REGOFFSET;
1717                         inst->inst_basereg = frame_reg;
1718                         offset             = S390_ALIGN(offset, sizeof(gpointer));
1719                         inst->inst_offset  = offset;
1720                         offset            += sizeof (gpointer);
1721                 }
1722                 curinst = sArg = 1;
1723         } else {
1724                 curinst = sArg = 0;
1725         }
1726
1727         eArg = sig->param_count + sArg;
1728
1729         if (sig->call_convention == MONO_CALL_VARARG)
1730                 cfg->sig_cookie += S390_MINIMAL_STACK_SIZE;
1731
1732         for (iParm = sArg; iParm < eArg; ++iParm) {
1733                 inst = cfg->varinfo [curinst];
1734                 if (inst->opcode != OP_REGVAR) {
1735                         switch (cinfo->args[iParm].regtype) {
1736                                 case RegTypeStructByAddr :
1737                                 if (cinfo->args[iParm].reg == STK_BASE) {
1738                                         inst->opcode       = OP_S390_LOADARG;
1739                                         inst->inst_basereg = frame_reg;
1740                                         offset             = S390_ALIGN(offset, sizeof(long));
1741                                         inst->inst_offset  = offset;
1742                                         size               = abs(cinfo->args[iParm].vtsize);
1743                                         inst->unused       = cinfo->args[iParm].offset;
1744                                 } else {
1745                                         inst->opcode       = OP_S390_ARGREG;
1746                                         inst->inst_basereg = frame_reg;
1747                                         size               = sizeof(gpointer);
1748                                         offset             = S390_ALIGN(offset, size);
1749                                         inst->inst_offset  = offset;
1750                                         inst->unused       = cinfo->args[iParm].offset;
1751                                 }
1752                                         break;
1753                                 case RegTypeStructByVal :
1754                                         inst->opcode       = OP_S390_ARGPTR;
1755                                         inst->inst_basereg = frame_reg;
1756                                         size               = cinfo->args[iParm].size;
1757                                         offset             = S390_ALIGN(offset, size);
1758                                         inst->inst_offset  = offset;
1759                                         inst->unused       = cinfo->args[iParm].offset;
1760                                         break;
1761                                 default :
1762                                 if (cinfo->args[iParm].reg != STK_BASE) {
1763                                         inst->opcode       = OP_REGOFFSET;
1764                                         inst->inst_basereg = frame_reg;
1765                                         size               = (cinfo->args[iParm].size < 8
1766                                                               ? sizeof(int)
1767                                                               : sizeof(long));
1768                                         offset             = S390_ALIGN(offset, size);
1769                                         inst->inst_offset  = offset;
1770                                 } else {
1771                                         inst->opcode       = OP_S390_STKARG;
1772                                         inst->inst_basereg = frame_reg;
1773                                         size               = ((cinfo->args[iParm].size < 8)
1774                                                               ? 8 - cinfo->args[iParm].size
1775                                                               : 0);
1776                                         inst->inst_offset  = cinfo->args[iParm].offset +
1777                                                              size;
1778                                         inst->unused       = 0;
1779                                         size               = sizeof(long);
1780                                 }
1781                         }
1782                         if ((sig->call_convention == MONO_CALL_VARARG) &&
1783                             (cinfo->args[iParm].regtype != RegTypeGeneral) &&
1784                             (iParm < sig->sentinelpos))
1785                                 cfg->sig_cookie += size;
1786
1787                         offset += size;
1788                 }
1789                 curinst++;
1790         }
1791
1792         curinst = cfg->locals_start;
1793         for (iVar = curinst; iVar < cfg->num_varinfo; ++iVar) {
1794                 inst = cfg->varinfo [iVar];
1795                 if ((inst->flags & MONO_INST_IS_DEAD) ||
1796                     (inst->opcode == OP_REGVAR))
1797                         continue;
1798
1799                 /*--------------------------------------------------*/
1800                 /* inst->unused indicates native sized value types, */
1801                 /* this is used by the pinvoke wrappers when they   */
1802                 /* call functions returning structure               */
1803                 /*--------------------------------------------------*/
1804                 if (inst->unused && MONO_TYPE_ISSTRUCT (inst->inst_vtype))
1805                         size = mono_class_native_size (mono_class_from_mono_type(inst->inst_vtype), &align);
1806                 else
1807                         size = mono_type_size (inst->inst_vtype, &align);
1808
1809                 offset             = S390_ALIGN(offset, align);
1810                 inst->inst_offset  = offset;
1811                 inst->opcode       = OP_REGOFFSET;
1812                 inst->inst_basereg = frame_reg;
1813                 offset            += size;
1814                 DEBUG (g_print("allocating local %d to %ld, size: %d\n",
1815                                 iVar, inst->inst_offset, size));
1816         }
1817
1818         /*------------------------------------------------------*/
1819         /* Allow space for the trace method stack area if needed*/
1820         /*------------------------------------------------------*/
1821         if (mono_jit_trace_calls != NULL && mono_trace_eval (cfg->method))
1822                 offset += S390_TRACE_STACK_SIZE;
1823
1824         /*------------------------------------------------------*/
1825         /* Reserve space to save LMF and caller saved registers */
1826         /*------------------------------------------------------*/
1827         if (cfg->method->save_lmf)
1828                 offset += sizeof (MonoLMF);
1829
1830         /*------------------------------------------------------*/
1831         /* align the offset                                     */
1832         /*------------------------------------------------------*/
1833         cfg->stack_offset = S390_ALIGN(offset, S390_STACK_ALIGNMENT);
1834
1835 }
1836
1837 /*========================= End of Function ========================*/
1838
1839 /*------------------------------------------------------------------*/
1840 /*                                                                  */
1841 /* Name         - mono_arch_call_opcode                             */
1842 /*                                                                  */
1843 /* Function     - Take the arguments and generate the arch-specific */
1844 /*                instructions to properly call the function. This  */
1845 /*                includes pushing, moving argments to the correct  */
1846 /*                etc.                                              */
1847 /*                                                                  */
1848 /*------------------------------------------------------------------*/
1849
1850 MonoCallInst*
1851 mono_arch_call_opcode (MonoCompile *cfg, MonoBasicBlock* bb,
1852                        MonoCallInst *call, int is_virtual) {
1853         MonoInst *in;
1854         MonoCallArgParm *arg;
1855         MonoMethodSignature *sig;
1856         int i, n, lParamArea;
1857         CallInfo *cinfo;
1858         ArgInfo *ainfo;
1859         size_data sz;
1860
1861         sig = call->signature;
1862         n = sig->param_count + sig->hasthis;
1863         DEBUG (g_print ("Call requires: %d parameters\n",n));
1864
1865         cinfo = calculate_sizes (sig, &sz, sig->pinvoke);
1866
1867         call->stack_usage = MAX(sz.stack_size, call->stack_usage);
1868         lParamArea        = MAX((call->stack_usage - S390_MINIMAL_STACK_SIZE - sz.parm_size), 0);
1869         cfg->param_area   = MAX (((signed) cfg->param_area), lParamArea);
1870         cfg->flags       |= MONO_CFG_HAS_CALLS;
1871
1872         if (cinfo->struct_ret)
1873                 call->used_iregs |= 1 << cinfo->ret.reg;
1874
1875         for (i = 0; i < n; ++i) {
1876                 ainfo = cinfo->args + i;
1877
1878                 if ((sig->call_convention == MONO_CALL_VARARG) &&
1879                     (i == sig->sentinelpos)) {
1880                         MonoInst *sigArg;
1881
1882                         cfg->disable_aot = TRUE;
1883                         MONO_INST_NEW (cfg, sigArg, OP_ICONST);
1884                         sigArg->inst_p0 = call->signature;
1885
1886                         MONO_INST_NEW_CALL_ARG (cfg, arg, OP_OUTARG_MEMBASE);
1887                         arg->ins.inst_left   = sigArg;
1888                         arg->ins.inst_right  = (MonoInst *) call;
1889                         arg->size            = ainfo->size;
1890                         arg->offset          = cinfo->sigCookie.offset;
1891                         call->used_iregs    |= 1 << ainfo->reg;
1892                         arg->ins.next        = call->out_args;
1893                         call->out_args       = (MonoInst *) arg;
1894                 }
1895
1896                 if (is_virtual && i == 0) {
1897                         /* the argument will be attached to the call instrucion */
1898                         in = call->args [i];
1899                         call->used_iregs |= 1 << ainfo->reg;
1900                 } else {
1901                         MONO_INST_NEW_CALL_ARG (cfg, arg, OP_OUTARG);
1902                         in                  = call->args [i];
1903                         arg->ins.cil_code   = in->cil_code;
1904                         arg->ins.inst_left  = in;
1905                         arg->ins.type       = in->type;
1906                         /* prepend, we'll need to reverse them later */
1907                         arg->ins.next       = call->out_args;
1908                         call->out_args      = (MonoInst *) arg;
1909                         arg->ins.inst_right = (MonoInst *) call;
1910                         if (ainfo->regtype == RegTypeGeneral) {
1911                                 arg->ins.unused = ainfo->reg;
1912                                 call->used_iregs |= 1 << ainfo->reg;
1913                         } else if (ainfo->regtype == RegTypeStructByAddr) {
1914                                 call->used_iregs |= 1 << ainfo->reg;
1915                                 arg->ins.sreg1    = ainfo->reg;
1916                                 arg->ins.opcode   = OP_OUTARG_VT;
1917                                 arg->size         = -ainfo->vtsize;
1918                                 arg->offset       = ainfo->offset;
1919                                 arg->offPrm       = ainfo->offparm + sz.offStruct;
1920                         } else if (ainfo->regtype == RegTypeStructByVal) {
1921                                 if (ainfo->reg != STK_BASE)
1922                                         call->used_iregs |= 1 << ainfo->reg;
1923                                 arg->ins.sreg1  = ainfo->reg;
1924                                 arg->ins.opcode = OP_OUTARG_VT;
1925                                 arg->size       = ainfo->size;
1926                                 arg->offset     = ainfo->offset;
1927                                 arg->offPrm     = ainfo->offparm + sz.offStruct;
1928                         } else if (ainfo->regtype == RegTypeBase) {
1929                                 arg->ins.opcode   = OP_OUTARG_MEMBASE;
1930                                 arg->ins.sreg1    = ainfo->reg;
1931                                 arg->size         = ainfo->size;
1932                                 arg->offset       = ainfo->offset;
1933                                 call->used_iregs |= 1 << ainfo->reg;
1934                         } else if (ainfo->regtype == RegTypeFP) {
1935                                 arg->ins.unused = ainfo->reg;
1936                                 call->used_fregs |= 1 << ainfo->reg;
1937                                 if (ainfo->size == 4)
1938                                         arg->ins.opcode = OP_OUTARG_R4;
1939                                 else
1940                                         arg->ins.opcode = OP_OUTARG_R8;
1941                         } else {
1942                                 g_assert_not_reached ();
1943                         }
1944                 }
1945         }
1946         /*
1947          * Reverse the call->out_args list.
1948          */
1949         {
1950                 MonoInst *prev = NULL, *list = call->out_args, *next;
1951                 while (list) {
1952                         next = list->next;
1953                         list->next = prev;
1954                         prev = list;
1955                         list = next;
1956                 }
1957                 call->out_args = prev;
1958         }
1959
1960         g_free (cinfo);
1961         return call;
1962 }
1963
1964 /*========================= End of Function ========================*/
1965
1966 /*------------------------------------------------------------------*/
1967 /*                                                                  */
1968 /* Name         - mono_arch_instrument_mem_needs                    */
1969 /*                                                                  */
1970 /* Function     - Allow tracing to work with this interface (with   */
1971 /*                an optional argument).                            */
1972 /*                                                                  */
1973 /*------------------------------------------------------------------*/
1974
1975 void
1976 mono_arch_instrument_mem_needs (MonoMethod *method, int *stack, int *code)
1977 {
1978         /* no stack room needed now (may be needed for FASTCALL-trace support) */
1979         *stack = 0;
1980         /* split prolog-epilog requirements? */
1981         *code = 50; /* max bytes needed: check this number */
1982 }
1983
1984 /*========================= End of Function ========================*/
1985
1986 /*------------------------------------------------------------------*/
1987 /*                                                                  */
1988 /* Name         - mono_arch_instrument_prolog                       */
1989 /*                                                                  */
1990 /* Function     - Create an "instrumented" prolog.                  */
1991 /*                                                                  */
1992 /*------------------------------------------------------------------*/
1993
1994 void*
1995 mono_arch_instrument_prolog (MonoCompile *cfg, void *func, void *p,
1996                              gboolean enable_arguments)
1997 {
1998         guchar  *code = p;
1999         int     parmOffset,
2000                 fpOffset;
2001
2002         parmOffset = cfg->stack_usage - S390_TRACE_STACK_SIZE;
2003         if (cfg->method->save_lmf)
2004                 parmOffset -= sizeof(MonoLMF);
2005         fpOffset   = parmOffset + (5*sizeof(gpointer));
2006
2007         s390_stmg (code, s390_r2, s390_r6, STK_BASE, parmOffset);
2008         s390_stdy (code, s390_f0, 0, STK_BASE, fpOffset);
2009         s390_stdy (code, s390_f2, 0, STK_BASE, fpOffset+sizeof(gdouble));
2010         s390_stdy (code, s390_f4, 0, STK_BASE, fpOffset+2*sizeof(gdouble));
2011         s390_stdy (code, s390_f6, 0, STK_BASE, fpOffset+3*sizeof(gdouble));
2012         s390_basr (code, s390_r13, 0);
2013         s390_j    (code, 10);
2014         s390_llong(code, cfg->method);
2015         s390_llong(code, func);
2016         s390_lg   (code, s390_r2, 0, s390_r13, 4);
2017         s390_lay  (code, s390_r3, 0, STK_BASE, parmOffset);
2018         s390_lgr  (code, s390_r4, STK_BASE);
2019         s390_aghi (code, s390_r4, cfg->stack_usage);
2020         s390_lg   (code, s390_r1, 0, s390_r13, 12);
2021         s390_basr (code, s390_r14, s390_r1);
2022         s390_ldy  (code, s390_f6, 0, STK_BASE, fpOffset+3*sizeof(gdouble));
2023         s390_ldy  (code, s390_f4, 0, STK_BASE, fpOffset+2*sizeof(gdouble));
2024         s390_ldy  (code, s390_f2, 0, STK_BASE, fpOffset+sizeof(gdouble));
2025         s390_ldy  (code, s390_f0, 0, STK_BASE, fpOffset);
2026         s390_lmg  (code, s390_r2, s390_r6, STK_BASE, parmOffset);
2027
2028         return code;
2029 }
2030
2031 /*========================= End of Function ========================*/
2032
2033 /*------------------------------------------------------------------*/
2034 /*                                                                  */
2035 /* Name         - mono_arch_instrument_epilog                       */
2036 /*                                                                  */
2037 /* Function     - Create an epilog that will handle the returned    */
2038 /*                values used in instrumentation.                   */
2039 /*                                                                  */
2040 /*------------------------------------------------------------------*/
2041
2042 void*
2043 mono_arch_instrument_epilog (MonoCompile *cfg, void *func, void *p, gboolean enable_arguments)
2044 {
2045         guchar     *code = p;
2046         int        save_mode = SAVE_NONE,
2047                    saveOffset;
2048         MonoMethod *method = cfg->method;
2049         int        rtype = mono_type_get_underlying_type (mono_method_signature (method)->ret)->type;
2050
2051         saveOffset = cfg->stack_usage - S390_TRACE_STACK_SIZE;
2052         if (method->save_lmf)
2053                 saveOffset -= sizeof(MonoLMF);
2054
2055 handle_enum:
2056         switch (rtype) {
2057         case MONO_TYPE_VOID:
2058                 /* special case string .ctor icall */
2059                 if (strcmp (".ctor", method->name) && method->klass == mono_defaults.string_class)
2060                         save_mode = SAVE_ONE;
2061                 else
2062                         save_mode = SAVE_NONE;
2063                 break;
2064         case MONO_TYPE_I8:
2065         case MONO_TYPE_U8:
2066                 save_mode = SAVE_ONE;
2067                 break;
2068         case MONO_TYPE_R4:
2069                 save_mode = SAVE_R4;
2070                 break;
2071         case MONO_TYPE_R8:
2072                 save_mode = SAVE_R8;
2073                 break;
2074         case MONO_TYPE_VALUETYPE:
2075                 if (mono_method_signature (method)->ret->data.klass->enumtype) {
2076                         rtype = mono_method_signature (method)->ret->data.klass->enum_basetype->type;
2077                         goto handle_enum;
2078                 }
2079                 save_mode = SAVE_STRUCT;
2080                 break;
2081         default:
2082                 save_mode = SAVE_ONE;
2083                 break;
2084         }
2085
2086         switch (save_mode) {
2087         case SAVE_ONE:
2088                 s390_stg (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2089                 if (enable_arguments) {
2090                         s390_lgr (code, s390_r3, s390_r2);
2091                 }
2092                 break;
2093         case SAVE_R4:
2094                 s390_std (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2095                 if (enable_arguments) {
2096                         s390_ldebr (code, s390_f0, s390_f0);
2097                 }
2098                 break;
2099         case SAVE_R8:
2100                 s390_std (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2101                 break;
2102         case SAVE_STRUCT:
2103                 s390_stg (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2104                 if (enable_arguments) {
2105                         s390_lg (code, s390_r3, 0, cfg->frame_reg,
2106                                  S390_MINIMAL_STACK_SIZE+cfg->param_area);
2107                 }
2108                 break;
2109         case SAVE_NONE:
2110         default:
2111                 break;
2112         }
2113
2114         s390_basr (code, s390_r13, 0);
2115         s390_j    (code, 10);
2116         s390_llong(code, cfg->method);
2117         s390_llong(code, func);
2118         s390_lg   (code, s390_r2, 0, s390_r13, 4);
2119         s390_lg   (code, s390_r1, 0, s390_r13, 12);
2120         s390_basr (code, s390_r14, s390_r1);
2121
2122         switch (save_mode) {
2123         case SAVE_ONE:
2124                 s390_lg  (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2125                 break;
2126         case SAVE_R4:
2127         case SAVE_R8:
2128                 s390_ld  (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2129                 break;
2130         case SAVE_STRUCT:
2131                 s390_lg  (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2132                 break;
2133         case SAVE_NONE:
2134         default:
2135                 break;
2136         }
2137
2138         return code;
2139 }
2140
2141 /*========================= End of Function ========================*/
2142
2143 /*------------------------------------------------------------------*/
2144 /*                                                                  */
2145 /* Name         - peephole_pass                                     */
2146 /*                                                                  */
2147 /* Function     - Form a peephole pass at the code looking for      */
2148 /*                simple optimizations.                             */
2149 /*                                                                  */
2150 /*------------------------------------------------------------------*/
2151
2152 static void
2153 peephole_pass (MonoCompile *cfg, MonoBasicBlock *bb)
2154 {
2155         MonoInst *ins, *last_ins = NULL;
2156         ins = bb->code;
2157
2158         while (ins) {
2159
2160                 switch (ins->opcode) {
2161                 case OP_MUL_IMM:
2162                         /* remove unnecessary multiplication with 1 */
2163                         if (ins->inst_imm == 1) {
2164                                 if (ins->dreg != ins->sreg1) {
2165                                         ins->opcode = OP_MOVE;
2166                                 } else {
2167                                         last_ins->next = ins->next;
2168                                         ins = ins->next;
2169                                         continue;
2170                                 }
2171                         }
2172                         break;
2173                 case OP_LOAD_MEMBASE:
2174                 case OP_LOADI4_MEMBASE:
2175                         /*
2176                          * OP_STORE_MEMBASE_REG reg, offset(basereg)
2177                          * OP_LOAD_MEMBASE offset(basereg), reg
2178                          */
2179                         if (last_ins && (last_ins->opcode == OP_STOREI4_MEMBASE_REG
2180                                          || last_ins->opcode == OP_STORE_MEMBASE_REG) &&
2181                             ins->inst_basereg == last_ins->inst_destbasereg &&
2182                             ins->inst_offset == last_ins->inst_offset) {
2183                                 if (ins->dreg == last_ins->sreg1) {
2184                                         last_ins->next = ins->next;
2185                                         ins = ins->next;
2186                                         continue;
2187                                 } else {
2188                                         ins->opcode = OP_MOVE;
2189                                         ins->sreg1 = last_ins->sreg1;
2190                                 }
2191
2192                         /*
2193                          * Note: reg1 must be different from the basereg in the second load
2194                          * OP_LOAD_MEMBASE offset(basereg), reg1
2195                          * OP_LOAD_MEMBASE offset(basereg), reg2
2196                          * -->
2197                          * OP_LOAD_MEMBASE offset(basereg), reg1
2198                          * OP_MOVE reg1, reg2
2199                          */
2200                         } if (last_ins && (last_ins->opcode == OP_LOADI4_MEMBASE
2201                                            || last_ins->opcode == OP_LOAD_MEMBASE) &&
2202                               ins->inst_basereg != last_ins->dreg &&
2203                               ins->inst_basereg == last_ins->inst_basereg &&
2204                               ins->inst_offset == last_ins->inst_offset) {
2205
2206                                 if (ins->dreg == last_ins->dreg) {
2207                                         last_ins->next = ins->next;
2208                                         ins = ins->next;
2209                                         continue;
2210                                 } else {
2211                                         ins->opcode = OP_MOVE;
2212                                         ins->sreg1 = last_ins->dreg;
2213                                 }
2214
2215                         }
2216                         break;
2217                 case OP_LOADU1_MEMBASE:
2218                 case OP_LOADI1_MEMBASE:
2219                         if (last_ins && (last_ins->opcode == OP_STOREI1_MEMBASE_REG) &&
2220                                         ins->inst_basereg == last_ins->inst_destbasereg &&
2221                                         ins->inst_offset == last_ins->inst_offset) {
2222                                 if (ins->dreg == last_ins->sreg1) {
2223                                         last_ins->next = ins->next;
2224                                         ins = ins->next;
2225                                         continue;
2226                                 } else {
2227                                         ins->opcode = OP_MOVE;
2228                                         ins->sreg1 = last_ins->sreg1;
2229                                 }
2230                         }
2231                         break;
2232                 case OP_LOADU2_MEMBASE:
2233                 case OP_LOADI2_MEMBASE:
2234                         if (last_ins && (last_ins->opcode == OP_STOREI2_MEMBASE_REG) &&
2235                                         ins->inst_basereg == last_ins->inst_destbasereg &&
2236                                         ins->inst_offset == last_ins->inst_offset) {
2237                                 if (ins->dreg == last_ins->sreg1) {
2238                                         last_ins->next = ins->next;
2239                                         ins = ins->next;
2240                                         continue;
2241                                 } else {
2242                                         ins->opcode = OP_MOVE;
2243                                         ins->sreg1 = last_ins->sreg1;
2244                                 }
2245                         }
2246                         break;
2247                 case CEE_CONV_I4:
2248                 case CEE_CONV_U4:
2249                 case OP_MOVE:
2250                         /*
2251                          * OP_MOVE reg, reg
2252                          */
2253                         if (ins->dreg == ins->sreg1) {
2254                                 if (last_ins)
2255                                         last_ins->next = ins->next;
2256                                 ins = ins->next;
2257                                 continue;
2258                         }
2259                         /*
2260                          * OP_MOVE sreg, dreg
2261                          * OP_MOVE dreg, sreg
2262                          */
2263                         if (last_ins && last_ins->opcode == OP_MOVE &&
2264                             ins->sreg1 == last_ins->dreg &&
2265                             ins->dreg == last_ins->sreg1) {
2266                                 last_ins->next = ins->next;
2267                                 ins = ins->next;
2268                                 continue;
2269                         }
2270                         break;
2271                 }
2272                 last_ins = ins;
2273                 ins = ins->next;
2274         }
2275         bb->last_ins = last_ins;
2276 }
2277
2278 /*========================= End of Function ========================*/
2279
2280 /*------------------------------------------------------------------*/
2281 /*                                                                  */
2282 /* Name         - mono_arch_local_regalloc.                         */
2283 /*                                                                  */
2284 /* Function     - We first scan the list of instructions and we     */
2285 /*                save the liveness information of each register    */
2286 /*                (when the register is first used, when its value  */
2287 /*                is set etc.). We also reverse the list of instr-  */
2288 /*                uctions (in the InstList list) because assigning  */
2289 /*                registers backwards allows for more tricks to be  */
2290 /*                used.                                             */
2291 /*                                                                  */
2292 /*------------------------------------------------------------------*/
2293
2294 void
2295 mono_arch_local_regalloc (MonoCompile *cfg, MonoBasicBlock *bb)
2296 {
2297         mono_local_regalloc(cfg, bb);
2298 }
2299
2300 /*========================= End of Function ========================*/
2301
2302 /*------------------------------------------------------------------*/
2303 /*                                                                  */
2304 /* Name         - emit_float_to_int                                 */
2305 /*                                                                  */
2306 /* Function     - Create instructions which will convert a floating */
2307 /*                point value to integer.                           */
2308 /*                                                                  */
2309 /*------------------------------------------------------------------*/
2310
2311 static guchar*
2312 emit_float_to_int (MonoCompile *cfg, guchar *code, int dreg, int sreg, int size, gboolean is_signed)
2313 {
2314         /* sreg is a float, dreg is an integer reg. */
2315         if (is_signed) {
2316                 s390_cfdbr (code, dreg, 5, sreg);
2317                 switch (size) {
2318                         case 1:
2319                                 s390_lghi (code, s390_r0, 0);
2320                                 s390_lghi (code, s390_r13, 0xff);
2321                                 s390_ltgr (code, dreg, dreg);
2322                                 s390_jnl  (code, 4);
2323                                 s390_lghi (code, s390_r0, 0x80);
2324                                 s390_ngr  (code, dreg, s390_r13);
2325                                 s390_ogr  (code, dreg, s390_r0);
2326                                 break;
2327                 }
2328         } else {
2329                 short *o[1];
2330                 s390_basr   (code, s390_r13, 0);
2331                 s390_j      (code, 10);
2332                 s390_llong  (code, 0x41e0000000000000);
2333                 s390_llong  (code, 0x41f0000000000000);
2334                 s390_ldr    (code, s390_f15, sreg);
2335                 s390_cdb    (code, s390_f15, 0, s390_r13, 4);
2336                 s390_jl     (code, 0); CODEPTR (code, o[0]);
2337                 s390_sdb    (code, s390_f15, 0, s390_r13, 12);
2338                 s390_cfdbr  (code, dreg, 7, s390_f15);
2339                 s390_j      (code, 4);
2340                 PTRSLOT (code, o[0]);
2341                 s390_cfdbr  (code, dreg, 5, sreg);
2342                 switch (size) {
2343                         case 1:
2344                                 s390_lghi (code, s390_r0, 0xff);
2345                                 s390_ngr  (code, dreg, s390_r0);
2346                                 break;
2347                         case 2:
2348                                 s390_lghi (code, s390_r0, -1);
2349                                 s390_srlg (code, s390_r0, s390_r0, 0, 16);
2350                                 s390_ngr  (code, dreg, s390_r0);
2351                                 break;
2352                 }
2353         }
2354         return code;
2355 }
2356
2357 /*========================= End of Function ========================*/
2358
2359 /*------------------------------------------------------------------*/
2360 /*                                                                  */
2361 /* Name         - mono_arch_output_basic_block                      */
2362 /*                                                                  */
2363 /* Function     - Perform the "real" work of emitting instructions  */
2364 /*                that will do the work of in the basic block.      */
2365 /*                                                                  */
2366 /*------------------------------------------------------------------*/
2367
2368 void
2369 mono_arch_output_basic_block (MonoCompile *cfg, MonoBasicBlock *bb)
2370 {
2371         MonoInst *ins;
2372         MonoCallInst *call;
2373         guint offset;
2374         guint8 *code = cfg->native_code + cfg->code_len;
2375         MonoInst *last_ins = NULL;
2376         guint last_offset = 0;
2377         int max_len, cpos, src2;
2378
2379         if (cfg->opt & MONO_OPT_PEEPHOLE)
2380                 peephole_pass (cfg, bb);
2381
2382         /* we don't align basic blocks of loops on s390 */
2383
2384         if (cfg->verbose_level > 2)
2385                 g_print ("Basic block %d starting at offset 0x%x\n", bb->block_num, bb->native_offset);
2386
2387         cpos = bb->max_offset;
2388
2389         if (cfg->prof_options & MONO_PROFILE_COVERAGE) {
2390                 //MonoCoverageInfo *cov = mono_get_coverage_info (cfg->method);
2391                 //g_assert (!mono_compile_aot);
2392                 //cpos += 6;
2393                 //if (bb->cil_code)
2394                 //      cov->data [bb->dfn].iloffset = bb->cil_code - cfg->cil_code;
2395                 /* this is not thread save, but good enough */
2396                 /* fixme: howto handle overflows? */
2397                 //x86_inc_mem (code, &cov->data [bb->dfn].count);
2398         }
2399
2400         ins = bb->code;
2401         while (ins) {
2402                 offset = code - cfg->native_code;
2403
2404                 max_len = ((guint8 *)ins_spec [ins->opcode])[MONO_INST_LEN];
2405
2406                 if (offset > (cfg->code_size - max_len - 16)) {
2407                         cfg->code_size *= 2;
2408                         cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
2409                         code = cfg->native_code + offset;
2410                 }
2411
2412                 mono_debug_record_line_number (cfg, ins, offset);
2413
2414                 switch (ins->opcode) {
2415                 case OP_STOREI1_MEMBASE_IMM: {
2416                         s390_lghi (code, s390_r0, ins->inst_imm);
2417                         if (s390_is_uimm20(ins->inst_offset))
2418                                 s390_stcy(code, s390_r0, 0, ins->inst_destbasereg, ins->inst_offset);
2419                         else {
2420                                 s390_basr (code, s390_r13, 0);
2421                                 s390_j    (code, 6);
2422                                 s390_llong(code, ins->inst_offset);
2423                                 s390_lg   (code, s390_r13, 0, s390_r13, 4);
2424                                 s390_stc  (code, s390_r0, s390_r13, ins->inst_destbasereg, 0);
2425                         }
2426                 }
2427                         break;
2428                 case OP_STOREI2_MEMBASE_IMM: {
2429                         s390_lghi (code, s390_r0, ins->inst_imm);
2430                         if (s390_is_uimm20(ins->inst_offset)) {
2431                                 s390_sthy (code, s390_r0, 0, ins->inst_destbasereg, ins->inst_offset);
2432                         } else {
2433                                 s390_basr (code, s390_r13, 0);
2434                                 s390_j    (code, 6);
2435                                 s390_llong(code, ins->inst_offset);
2436                                 s390_lg   (code, s390_r13, 0, s390_r13, 4);
2437                                 s390_sth  (code, s390_r0, s390_r13, ins->inst_destbasereg, 0);
2438                         }
2439                 }
2440                         break;
2441                 case OP_STOREI4_MEMBASE_IMM: {
2442                         if (s390_is_imm16(ins->inst_imm)) {
2443                                 s390_lghi (code, s390_r0, ins->inst_imm);
2444                         } else {
2445                                 s390_basr (code, s390_r13, 0);
2446                                 s390_j    (code, 6);
2447                                 s390_llong(code, ins->inst_imm);
2448                                 s390_lg   (code, s390_r0, 0, s390_r13, 4);
2449                         }
2450                         if (s390_is_uimm20(ins->inst_offset)) {
2451                                 s390_sty (code, s390_r0, 0, ins->inst_destbasereg, ins->inst_offset);
2452                         } else {
2453                                 s390_basr (code, s390_r13, 0);
2454                                 s390_j    (code, 6);
2455                                 s390_llong(code, ins->inst_offset);
2456                                 s390_lg   (code, s390_r13, 0, s390_r13, 4);
2457                                 s390_st   (code, s390_r0, s390_r13, ins->inst_destbasereg, 0);
2458                         }
2459                 }
2460                         break;
2461                 case OP_STORE_MEMBASE_IMM:
2462                 case OP_STOREI8_MEMBASE_IMM: {
2463                         if (s390_is_imm16(ins->inst_imm)) {
2464                                 s390_lghi (code, s390_r0, ins->inst_imm);
2465                         } else {
2466                                 s390_basr (code, s390_r13, 0);
2467                                 s390_j    (code, 6);
2468                                 s390_llong(code, ins->inst_imm);
2469                                 s390_lg   (code, s390_r0, 0, s390_r13, 4);
2470                         }
2471                         if (s390_is_uimm20(ins->inst_offset)) {
2472                                 s390_stg  (code, s390_r0, 0, ins->inst_destbasereg, ins->inst_offset);
2473                         } else {
2474                                 s390_basr (code, s390_r13, 0);
2475                                 s390_j    (code, 6);
2476                                 s390_llong(code, ins->inst_offset);
2477                                 s390_lg   (code, s390_r13, 0, s390_r13, 4);
2478                                 s390_stg  (code, s390_r0, s390_r13, ins->inst_destbasereg, 0);
2479                         }
2480                 }
2481                         break;
2482                 case OP_STOREI1_MEMBASE_REG: {
2483                         if (s390_is_uimm20(ins->inst_offset)) {
2484                                 s390_stcy (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
2485                         } else {
2486                                 s390_basr (code, s390_r13, 0);
2487                                 s390_j    (code, 6);
2488                                 s390_llong(code, ins->inst_offset);
2489                                 s390_lg   (code, s390_r13, 0, s390_r13, 4);
2490                                 s390_stc  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
2491                         }
2492                 }
2493                         break;
2494                 case OP_STOREI2_MEMBASE_REG: {
2495                         if (s390_is_uimm20(ins->inst_offset)) {
2496                                 s390_sthy (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
2497                         } else {
2498                                 s390_basr (code, s390_r13, 0);
2499                                 s390_j    (code, 6);
2500                                 s390_llong(code, ins->inst_offset);
2501                                 s390_lg   (code, s390_r13, 0, s390_r13, 4);
2502                                 s390_sth  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
2503                         }
2504                 }
2505                         break;
2506                 case OP_STOREI4_MEMBASE_REG: {
2507                         if (s390_is_uimm20(ins->inst_offset)) {
2508                                 s390_sty  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
2509                         } else {
2510                                 s390_basr (code, s390_r13, 0);
2511                                 s390_j    (code, 6);
2512                                 s390_llong(code, ins->inst_offset);
2513                                 s390_lg   (code, s390_r13, 0, s390_r13, 4);
2514                                 s390_st   (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
2515                         }
2516                 }
2517                         break;
2518                 case OP_STORE_MEMBASE_REG:
2519                 case OP_STOREI8_MEMBASE_REG: {
2520                         if (s390_is_uimm20(ins->inst_offset)) {
2521                                 s390_stg  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
2522                         } else {
2523                                 s390_basr (code, s390_r13, 0);
2524                                 s390_j    (code, 6);
2525                                 s390_llong(code, ins->inst_offset);
2526                                 s390_lg   (code, s390_r13, 0, s390_r13, 4);
2527                                 s390_stg  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
2528                         }
2529                 }
2530                         break;
2531                 case CEE_LDIND_I:
2532                 case CEE_LDIND_I4: {
2533                         s390_basr (code, s390_r13, 0);
2534                         s390_j    (code, 6);
2535                         s390_llong(code, ins->inst_p0);
2536                         s390_lg   (code, s390_r13, 0, s390_r13, 4);
2537                         s390_lgf  (code, ins->dreg, 0, s390_r13, 0);
2538                 }
2539                         break;
2540                 case CEE_LDIND_U4: {
2541                         s390_basr (code, s390_r13, 0);
2542                         s390_j    (code, 6);
2543                         s390_llong(code, ins->inst_p0);
2544                         s390_lg   (code, s390_r13, 0, s390_r13, 4);
2545                         s390_llgf (code, ins->dreg, 0, s390_r13, 0);
2546                 }
2547                         break;
2548                 case OP_LOADU4_MEM:
2549                         g_assert_not_reached ();
2550                         break;
2551                 case OP_LOAD_MEMBASE:
2552                 case OP_LOADI8_MEMBASE: {
2553                         if (s390_is_uimm20(ins->inst_offset))
2554                                 s390_lg   (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
2555                         else {
2556                                 s390_basr (code, s390_r13, 0);
2557                                 s390_j    (code, 6);
2558                                 s390_llong(code, ins->inst_offset);
2559                                 s390_lg   (code, s390_r13, 0, s390_r13, 4);
2560                                 s390_lg   (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
2561                         }
2562                 }
2563                         break;
2564                 case OP_LOADI4_MEMBASE: {
2565                         if (s390_is_uimm20(ins->inst_offset))
2566                                 s390_lgf  (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
2567                         else {
2568                                 s390_basr (code, s390_r13, 0);
2569                                 s390_j    (code, 6);
2570                                 s390_llong(code, ins->inst_offset);
2571                                 s390_lg   (code, s390_r13, 0, s390_r13, 4);
2572                                 s390_lgf  (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
2573                         }
2574                 }
2575                         break;
2576                 case OP_LOADU4_MEMBASE: {
2577                         if (s390_is_uimm20(ins->inst_offset))
2578                                 s390_llgf (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
2579                         else {
2580                                 s390_basr (code, s390_r13, 0);
2581                                 s390_j    (code, 6);
2582                                 s390_llong(code, ins->inst_offset);
2583                                 s390_lg   (code, s390_r13, 0, s390_r13, 4);
2584                                 s390_llgf (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
2585                         }
2586                 }
2587                         break;
2588                 case OP_LOADU1_MEMBASE: {
2589                         if (s390_is_uimm20(ins->inst_offset))
2590                                 s390_llgc (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
2591                         else {
2592                                 s390_basr (code, s390_r13, 0);
2593                                 s390_j    (code, 6);
2594                                 s390_llong(code, ins->inst_offset);
2595                                 s390_lg   (code, s390_r13, 0, s390_r13, 4);
2596                                 s390_llgc (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
2597                         }
2598                 }
2599                         break;
2600                 case OP_LOADI1_MEMBASE: {
2601                         if (s390_is_uimm20(ins->inst_offset))
2602                                 s390_lgb  (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
2603                         else {
2604                                 s390_basr (code, s390_r13, 0);
2605                                 s390_j    (code, 6);
2606                                 s390_llong(code, ins->inst_offset);
2607                                 s390_lg   (code, s390_r13, 0, s390_r13, 4);
2608                                 s390_lgb  (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
2609                         }
2610                 }
2611                         break;
2612                 case OP_LOADU2_MEMBASE: {
2613                         if (s390_is_uimm20(ins->inst_offset))
2614                                 s390_llgh (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
2615                         else {
2616                                 s390_basr (code, s390_r13, 0);
2617                                 s390_j    (code, 6);
2618                                 s390_llong(code, ins->inst_offset);
2619                                 s390_lg   (code, s390_r13, 0, s390_r13, 4);
2620                                 s390_llgh (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
2621                         }
2622                 }
2623                         break;
2624                 case OP_LOADI2_MEMBASE: {
2625                         if (s390_is_uimm20(ins->inst_offset))
2626                                 s390_lgh (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
2627                         else {
2628                                 s390_basr (code, s390_r13, 0);
2629                                 s390_j    (code, 6);
2630                                 s390_llong(code, ins->inst_offset);
2631                                 s390_lg   (code, s390_r13, 0, s390_r13, 4);
2632                                 s390_lgh  (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
2633                         }
2634                 }
2635                         break;
2636                 case CEE_CONV_I1: {
2637                         s390_lghi  (code, s390_r0, 0x80);
2638                         if (ins->dreg != ins->sreg1) {
2639                                 s390_lgr  (code, ins->dreg, ins->sreg1);
2640                         }
2641                         s390_ngr  (code, s390_r0, ins->sreg1);
2642                         s390_jz   (code, 9);
2643                         s390_lghi (code, s390_r13, -1);
2644                         s390_sllg (code, s390_r13, s390_r13, 0, 8);
2645                         s390_ogr  (code, ins->dreg, s390_r13);
2646                 }
2647                         break;
2648                 case CEE_CONV_I2: {
2649                         s390_lghi (code, s390_r0, 0x80);
2650                         s390_sllg (code, s390_r0, s390_r0, 0, 8);
2651                         if (ins->dreg != ins->sreg1) {
2652                                 s390_lgr  (code, ins->dreg, ins->sreg1);
2653                         }
2654                         s390_ngr  (code, s390_r0, ins->sreg1);
2655                         s390_jz   (code, 9);
2656                         s390_lghi (code, s390_r13, -1);
2657                         s390_sllg (code, s390_r13, s390_r13, 0, 16);
2658                         s390_ogr  (code, ins->dreg, s390_r13);
2659                 }
2660                         break;
2661                 case CEE_CONV_U1: {
2662                         s390_lghi (code, s390_r0, 0xff);
2663                         if (ins->dreg != ins->sreg1) {
2664                                 s390_lgr  (code, ins->dreg, ins->sreg1);
2665                         }
2666                         s390_ngr  (code, ins->dreg, s390_r0);
2667                 }
2668                         break;
2669                 case CEE_CONV_U2: {
2670                         s390_lghi (code, s390_r0, -1);
2671                         s390_sllg (code, s390_r0, s390_r0, 0, 16);
2672                         s390_srlg (code, s390_r0, s390_r0, 0, 16);
2673                         if (ins->dreg != ins->sreg1) {
2674                                 s390_lgr  (code, ins->dreg, ins->sreg1);
2675                         }
2676                         s390_ngr  (code, ins->dreg, s390_r0);
2677                 }
2678                         break;
2679                 case OP_COMPARE:
2680                 case OP_LCOMPARE: {
2681                         if ((ins->next) &&
2682                             (opcode_to_cond(ins->next->opcode) >= CMP_LE_UN))
2683                                 s390_clgr (code, ins->sreg1, ins->sreg2);
2684                         else
2685                                 s390_cgr  (code, ins->sreg1, ins->sreg2);
2686                 }
2687                         break;
2688                 case OP_COMPARE_IMM: {
2689                         if (s390_is_imm16 (ins->inst_imm)) {
2690                                 s390_lghi (code, s390_r0, ins->inst_imm);
2691                                 if ((ins->next) &&
2692                                     (opcode_to_cond(ins->next->opcode) >= CMP_LE_UN))
2693                                         s390_clgr (code, ins->sreg1, s390_r0);
2694                                 else
2695                                         s390_cgr  (code, ins->sreg1, s390_r0);
2696                         }
2697                         else {
2698                                 s390_basr (code, s390_r13, 0);
2699                                 s390_j    (code, 6);
2700                                 s390_llong(code, ins->inst_imm);
2701                                 if ((ins->next) &&
2702                                     (opcode_to_cond(ins->next->opcode) >= CMP_LE_UN))
2703                                         s390_clg  (code, ins->sreg1, 0, s390_r13, 4);
2704                                 else
2705                                         s390_cg   (code, ins->sreg1, 0, s390_r13, 4);
2706                         }
2707                 }
2708                         break;
2709                 case OP_ICOMPARE: {
2710                         if ((ins->next) &&
2711                             (opcode_to_cond(ins->next->opcode) >= CMP_LE_UN))
2712                                 s390_clr  (code, ins->sreg1, ins->sreg2);
2713                         else
2714                                 s390_cr   (code, ins->sreg1, ins->sreg2);
2715                 }
2716                         break;
2717                 case OP_ICOMPARE_IMM: {
2718                         if (s390_is_imm16 (ins->inst_imm)) {
2719                                 s390_lghi (code, s390_r0, ins->inst_imm);
2720                                 if ((ins->next) &&
2721                                     (opcode_to_cond(ins->next->opcode) >= CMP_LE_UN))
2722                                         s390_clr  (code, ins->sreg1, s390_r0);
2723                                 else
2724                                         s390_cr   (code, ins->sreg1, s390_r0);
2725                         }
2726                         else {
2727                                 s390_basr (code, s390_r13, 0);
2728                                 s390_j    (code, 4);
2729                                 s390_word (code, ins->inst_imm);
2730                                 if ((ins->next) &&
2731                                     (opcode_to_cond(ins->next->opcode) >= CMP_LE_UN))
2732                                         s390_cl  (code, ins->sreg1, 0, s390_r13, 4);
2733                                 else
2734                                         s390_c   (code, ins->sreg1, 0, s390_r13, 4);
2735                         }
2736                 }
2737                         break;
2738                 case OP_X86_TEST_NULL: {
2739                         s390_ltgr (code, ins->sreg1, ins->sreg1);
2740                 }
2741                         break;
2742                 case CEE_BREAK: {
2743                         s390_basr  (code, s390_r13, 0);
2744                         s390_j     (code, 6);
2745                         mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS,
2746                                              mono_arch_break);
2747                         s390_llong (code, mono_arch_break);
2748                         s390_lg    (code, s390_r14, 0, s390_r13, 4);
2749                         s390_basr  (code, s390_r14, s390_r14);
2750                 }
2751                         break;
2752                 case OP_ADDCC: {
2753                         CHECK_SRCDST_COM;
2754                         s390_algr  (code, ins->dreg, src2);
2755                 }
2756                         break;
2757                 case CEE_ADD: {
2758                         CHECK_SRCDST_COM;
2759                         s390_agr   (code, ins->dreg, src2);
2760                 }
2761                         break;
2762                 case OP_ADC: {
2763                         CHECK_SRCDST_COM;
2764                         s390_alcgr (code, ins->dreg, src2);
2765                 }
2766                         break;
2767                 case OP_ADD_IMM: {
2768                         if (ins->dreg != ins->sreg1) {
2769                                 s390_lgr  (code, ins->dreg, ins->sreg1);
2770                         }
2771                         if (s390_is_imm16 (ins->inst_imm)) {
2772                                 s390_aghi (code, ins->dreg, ins->inst_imm);
2773                         } else {
2774                                 s390_basr (code, s390_r13, 0);
2775                                 s390_j    (code, 6);
2776                                 s390_llong(code, ins->inst_imm);
2777                                 s390_ag   (code, ins->dreg, 0, s390_r13, 4);
2778                         }
2779                 }
2780                         break;
2781 //              case OP_ADDCC_IMM: {
2782 //                      if ((ins->next) &&
2783 //                          (ins->next->opcode == OP_ADC_IMM)) {
2784 //                              s390_basr (code, s390_r13, 0);
2785 //                              s390_j    (code, 6);
2786 //                              s390_llong(code, ins->inst_imm);
2787 //                              if (ins->dreg != ins->sreg1) {
2788 //                                      s390_lgr  (code, ins->dreg, ins->sreg1);
2789 //                              }
2790 //                              s390_alg  (code, ins->dreg, 0, s390_r13, 4);
2791 //                      } else {
2792 //                              if (s390_is_imm16 (ins->inst_imm)) {
2793 //                                      if (ins->dreg != ins->sreg1) {
2794 //                                              s390_lgr  (code, ins->dreg, ins->sreg1);
2795 //                                      }
2796 //                                      s390_aghi (code, ins->dreg, ins->inst_imm);
2797 //                              } else {
2798 //                                      s390_basr (code, s390_r13, 0);
2799 //                                      s390_j    (code, 6);
2800 //                                      s390_llong(code, ins->inst_imm);
2801 //                                      if (ins->dreg != ins->sreg1) {
2802 //                                              s390_lgr  (code, ins->dreg, ins->sreg1);
2803 //                                      }
2804 //                                      s390_ag   (code, ins->dreg, 0, s390_r13, 4);
2805 //                              }
2806 //                      }
2807 //              }
2808 //                      break;
2809                 case OP_ADC_IMM: {
2810                         if (ins->dreg != ins->sreg1) {
2811                                 s390_lgr  (code, ins->dreg, ins->sreg1);
2812                         }
2813                         if (s390_is_imm16 (ins->inst_imm)) {
2814                                 s390_lghi  (code, s390_r0, ins->inst_imm);
2815                                 s390_alcgr (code, ins->dreg, s390_r0);
2816                         } else {
2817                                 s390_basr  (code, s390_r13, 0);
2818                                 s390_j     (code, 6);
2819                                 s390_llong (code, ins->inst_imm);
2820                                 s390_lg    (code, s390_r13, 0, s390_r13, 4);
2821                                 s390_alcgr (code, ins->dreg, s390_r13);
2822                         }
2823                 }
2824                         break;
2825                 case OP_LADD_OVF: {
2826                         CHECK_SRCDST_COM;
2827                         s390_agr   (code, ins->dreg, src2);
2828                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2829                 }
2830                         break;
2831                 case OP_LADD_OVF_UN: {
2832                         CHECK_SRCDST_COM;
2833                         s390_algr  (code, ins->dreg, src2);
2834                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
2835                 }
2836                         break;
2837                 case OP_ADD_OVF_CARRY: {
2838                         CHECK_SRCDST_COM;
2839                         s390_lghi  (code, s390_r0, 0);
2840                         s390_lgr   (code, s390_r1, s390_r0);
2841                         s390_alcgr (code, s390_r0, s390_r1);
2842                         s390_agr   (code, ins->dreg, src2);
2843                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2844                         s390_agr   (code, ins->dreg, s390_r0);
2845                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2846                 }
2847                         break;
2848                 case OP_ADD_OVF_UN_CARRY: {
2849                         CHECK_SRCDST_COM;
2850                         s390_alcgr (code, ins->dreg, src2);
2851                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
2852                 }
2853                         break;
2854                 case OP_SUBCC: {
2855                         CHECK_SRCDST_NCOM;
2856                         s390_slgr (code, ins->dreg, src2);
2857                 }
2858                         break;
2859                 case CEE_SUB: {
2860                         CHECK_SRCDST_NCOM;
2861                         s390_sgr  (code, ins->dreg, src2);
2862                 }
2863                         break;
2864                 case OP_SBB: {
2865                         CHECK_SRCDST_NCOM;
2866                         s390_slbgr(code, ins->dreg, src2);
2867                 }
2868                         break;
2869                 case OP_SUB_IMM: {
2870                         if (ins->dreg != ins->sreg1) {
2871                                 s390_lgr   (code, ins->dreg, ins->sreg1);
2872                         }
2873                         if (s390_is_imm16 (-ins->inst_imm)) {
2874                                 s390_lghi  (code, s390_r0, ins->inst_imm);
2875                                 s390_slgr  (code, ins->dreg, s390_r0);
2876                         } else {
2877                                 s390_basr (code, s390_r13, 0);
2878                                 s390_j    (code, 6);
2879                                 s390_llong(code, ins->inst_imm);
2880                                 s390_slg  (code, ins->dreg, 0, s390_r13, 4);
2881                         }
2882                 }
2883                         break;
2884                 case OP_SBB_IMM: {
2885                         if (ins->dreg != ins->sreg1) {
2886                                 s390_lgr   (code, ins->dreg, ins->sreg1);
2887                         }
2888                         if (s390_is_imm16 (-ins->inst_imm)) {
2889                                 s390_lghi  (code, s390_r0, ins->inst_imm);
2890                                 s390_slbgr (code, ins->dreg, s390_r0);
2891                         } else {
2892                                 s390_basr (code, s390_r13, 0);
2893                                 s390_j    (code, 6);
2894                                 s390_llong(code, ins->inst_imm);
2895                                 s390_slbg (code, ins->dreg, 0, s390_r13, 4);
2896                         }
2897                 }
2898                         break;
2899                 case OP_LSUB_OVF: {
2900                         CHECK_SRCDST_NCOM;
2901                         s390_sgr  (code, ins->dreg, src2);
2902                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2903                 }
2904                         break;
2905                 case OP_LSUB_OVF_UN: {
2906                         CHECK_SRCDST_NCOM;
2907                         s390_slgr (code, ins->dreg, src2);
2908                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
2909                 }
2910                         break;
2911                 case OP_SUB_OVF_CARRY: {
2912                         CHECK_SRCDST_NCOM;
2913                         s390_lghi  (code, s390_r0, 0);
2914                         s390_lgr   (code, s390_r1, s390_r0);
2915                         s390_slbgr (code, s390_r0, s390_r1);
2916                         s390_sgr   (code, ins->dreg, src2);
2917                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2918                         s390_agr   (code, ins->dreg, s390_r0);
2919                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2920                 }
2921                         break;
2922                 case OP_SUB_OVF_UN_CARRY: {
2923                         CHECK_SRCDST_NCOM;
2924                         s390_slbgr (code, ins->dreg, src2);
2925                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
2926                 }
2927                         break;
2928                 case CEE_AND: {
2929                         if (ins->sreg1 == ins->dreg) {
2930                                 s390_ngr  (code, ins->dreg, ins->sreg2);
2931                         }
2932                         else {
2933                                 if (ins->sreg2 == ins->dreg) {
2934                                         s390_ngr (code, ins->dreg, ins->sreg1);
2935                                 }
2936                                 else {
2937                                         s390_lgr (code, ins->dreg, ins->sreg1);
2938                                         s390_ngr (code, ins->dreg, ins->sreg2);
2939                                 }
2940                         }
2941                 }
2942                         break;
2943                 case OP_AND_IMM: {
2944                         if (ins->dreg != ins->sreg1) {
2945                                 s390_lgr  (code, ins->dreg, ins->sreg1);
2946                         }
2947                         if (s390_is_imm16 (ins->inst_imm)) {
2948                                 s390_lghi  (code, s390_r0, ins->inst_imm);
2949                                 s390_ngr  (code, ins->dreg, s390_r0);
2950                         } else {
2951                                 s390_basr (code, s390_r13, 0);
2952                                 s390_j    (code, 6);
2953                                 s390_llong(code, ins->inst_imm);
2954                                 s390_ng   (code, ins->dreg, 0, s390_r13, 4);
2955                         }
2956                 }
2957                         break;
2958                 case OP_LDIV: {
2959                         s390_lgr  (code, s390_r1, ins->sreg1);
2960                         s390_dsgr (code, s390_r0, ins->sreg2);
2961                         s390_lgr  (code, ins->dreg, s390_r1);
2962                 }
2963                         break;
2964                 case OP_LDIV_UN: {
2965                         s390_lgr   (code, s390_r1, ins->sreg1);
2966                         s390_lghi  (code, s390_r0, 0);
2967                         s390_dlgr  (code, s390_r0, ins->sreg2);
2968                         s390_lgr   (code, ins->dreg, s390_r1);
2969                 }
2970                         break;
2971                 case OP_DIV_IMM: {
2972                         if (s390_is_imm16 (ins->inst_imm)) {
2973                                 s390_lghi (code, s390_r13, ins->inst_imm);
2974                                 s390_lgr  (code, s390_r1, ins->sreg1);
2975                         } else {
2976                                 s390_basr (code, s390_r13, 0);
2977                                 s390_j    (code, 6);
2978                                 s390_llong(code, ins->inst_imm);
2979                                 s390_lgr  (code, s390_r1, ins->sreg1);
2980                                 s390_lg   (code, s390_r13, 0, s390_r13, 4);
2981                         }
2982                         s390_dsgr (code, s390_r0, s390_r13);
2983                         s390_lgr  (code, ins->dreg, s390_r1);
2984                 }
2985                         break;
2986                 case OP_LREM: {
2987                         s390_lgr  (code, s390_r1, ins->sreg1);
2988                         s390_dsgr (code, s390_r0, ins->sreg2);
2989                         s390_lgr  (code, ins->dreg, s390_r0);
2990                         break;
2991                 }
2992                 case OP_LREM_UN: {
2993                         s390_lgr   (code, s390_r1, ins->sreg1);
2994                         s390_lghi  (code, s390_r0, 0);
2995                         s390_dlgr  (code, s390_r0, ins->sreg2);
2996                         s390_lgr   (code, ins->dreg, s390_r0);
2997                 }
2998                         break;
2999                 case OP_REM_IMM: {
3000                         if (s390_is_imm16 (ins->inst_imm)) {
3001                                 s390_lghi  (code, s390_r13, ins->inst_imm);
3002                                 s390_lgr   (code, s390_r0, ins->sreg1);
3003                         } else {
3004                                 s390_basr (code, s390_r13, 0);
3005                                 s390_j    (code, 6);
3006                                 s390_llong(code, ins->inst_imm);
3007                                 s390_lgr  (code, s390_r0, ins->sreg1);
3008                                 s390_lg   (code, s390_r13, 0, s390_r13, 4);
3009                         }
3010                         s390_dsgr(code, s390_r0, s390_r13);
3011                         s390_lgr (code, ins->dreg, s390_r0);
3012                 }
3013                         break;
3014                 case CEE_OR: {
3015                         if (ins->sreg1 == ins->dreg) {
3016                                 s390_ogr  (code, ins->dreg, ins->sreg2);
3017                         }
3018                         else {
3019                                 if (ins->sreg2 == ins->dreg) {
3020                                         s390_ogr (code, ins->dreg, ins->sreg1);
3021                                 }
3022                                 else {
3023                                         s390_lgr (code, ins->dreg, ins->sreg1);
3024                                         s390_ogr (code, ins->dreg, ins->sreg2);
3025                                 }
3026                         }
3027                 }
3028                         break;
3029                 case OP_OR_IMM: {
3030                         if (ins->dreg != ins->sreg1) {
3031                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3032                         }
3033                         if (s390_is_imm16 (ins->inst_imm)) {
3034                                 s390_lghi (code, s390_r0, ins->inst_imm);
3035                                 s390_ogr  (code, ins->dreg, s390_r0);
3036                         } else {
3037                                 s390_basr (code, s390_r13, 0);
3038                                 s390_j    (code, 6);
3039                                 s390_llong(code, ins->inst_imm);
3040                                 s390_og   (code, ins->dreg, 0, s390_r13, 4);
3041                         }
3042                 }
3043                         break;
3044                 case CEE_XOR: {
3045                         if (ins->sreg1 == ins->dreg) {
3046                                 s390_xgr  (code, ins->dreg, ins->sreg2);
3047                         }
3048                         else {
3049                                 if (ins->sreg2 == ins->dreg) {
3050                                         s390_xgr (code, ins->dreg, ins->sreg1);
3051                                 }
3052                                 else {
3053                                         s390_lgr (code, ins->dreg, ins->sreg1);
3054                                         s390_xgr (code, ins->dreg, ins->sreg2);
3055                                 }
3056                         }
3057                 }
3058                         break;
3059                 case OP_XOR_IMM: {
3060                         if (ins->dreg != ins->sreg1) {
3061                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3062                         }
3063                         if (s390_is_imm16 (ins->inst_imm)) {
3064                                 s390_lghi  (code, s390_r0, ins->inst_imm);
3065                                 s390_xgr  (code, ins->dreg, s390_r0);
3066                         } else {
3067                                 s390_basr (code, s390_r13, 0);
3068                                 s390_j    (code, 6);
3069                                 s390_llong(code, ins->inst_imm);
3070                                 s390_xg   (code, ins->dreg, 0, s390_r13, 4);
3071                         }
3072                 }
3073                         break;
3074                 case CEE_SHL:
3075                 case OP_LSHL: {
3076                         CHECK_SRCDST_NCOM;
3077                         s390_sllg (code, ins->dreg, ins->dreg, src2, 0);
3078                 }
3079                         break;
3080                 case OP_SHL_IMM:
3081                 case OP_LSHL_IMM: {
3082                         if (ins->sreg1 != ins->dreg) {
3083                                 s390_lgr   (code, ins->dreg, ins->sreg1);
3084                         }
3085                         s390_sllg (code, ins->dreg, ins->dreg, 0, (ins->inst_imm & 0x3f));
3086                 }
3087                         break;
3088                 case CEE_SHR:
3089                 case OP_LSHR: {
3090                         CHECK_SRCDST_NCOM;
3091                         s390_srag  (code, ins->dreg, ins->dreg, src2, 0);
3092                 }
3093                         break;
3094                 case OP_SHR_IMM:
3095                 case OP_LSHR_IMM: {
3096                         if (ins->sreg1 != ins->dreg) {
3097                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3098                         }
3099                         s390_srag  (code, ins->dreg, ins->dreg, 0, (ins->inst_imm & 0x3f));
3100                 }
3101                         break;
3102                 case OP_SHR_UN_IMM:
3103                 case OP_LSHR_UN_IMM: {
3104                         if (ins->sreg1 != ins->dreg) {
3105                                 s390_lgr   (code, ins->dreg, ins->sreg1);
3106                         }
3107                         s390_srlg (code, ins->dreg, ins->dreg, 0, (ins->inst_imm & 0x3f));
3108                 }
3109                         break;
3110                 case CEE_SHR_UN:
3111                 case OP_LSHR_UN: {
3112                         CHECK_SRCDST_NCOM;
3113                         s390_srlg (code, ins->dreg, ins->dreg, src2, 0);
3114                 }
3115                         break;
3116                 case CEE_NOT: {
3117                         if (ins->sreg1 != ins->dreg) {
3118                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3119                         }
3120                         s390_lghi (code, s390_r0, -1);
3121                         s390_xgr  (code, ins->dreg, s390_r0);
3122                 }
3123                         break;
3124                 case CEE_NEG: {
3125                         s390_lcgr (code, ins->dreg, ins->sreg1);
3126                 }
3127                         break;
3128                 case CEE_MUL:
3129                 case OP_LMUL: {
3130                         CHECK_SRCDST_COM;
3131                         s390_msgr (code, ins->dreg, src2);
3132                 }
3133                         break;
3134                 case OP_MUL_IMM:
3135                 case OP_LMUL_IMM: {
3136                         if (ins->dreg != ins->sreg1) {
3137                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3138                         }
3139                         if (s390_is_imm16 (ins->inst_imm)) {
3140                                 s390_lghi (code, s390_r13, ins->inst_imm);
3141                         } else {
3142                                 s390_basr (code, s390_r13, 0);
3143                                 s390_j    (code, 6);
3144                                 s390_llong(code, ins->inst_imm);
3145                                 s390_lg   (code, s390_r13, 0, s390_r13, 4);
3146                         }
3147                         s390_msgr (code, ins->dreg, s390_r13);
3148                 }
3149                         break;
3150                 case OP_LMUL_OVF:
3151                 case CEE_MUL_OVF: {
3152                         short int *o[2];
3153                         s390_ltgr (code, s390_r1, ins->sreg1);
3154                         s390_jz   (code, 0); CODEPTR(code, o[0]);
3155                         s390_ltgr (code, s390_r0, ins->sreg2);
3156                         s390_jnz  (code, 6);
3157                         s390_lghi (code, s390_r1, 0);
3158                         s390_j    (code, 0); CODEPTR(code, o[1]);
3159                         s390_xgr  (code, s390_r0, s390_r1);
3160                         s390_msgr (code, s390_r1, ins->sreg2);
3161                         s390_xgr  (code, s390_r0, s390_r1);
3162                         s390_srlg (code, s390_r0, s390_r0, 0, 63);
3163                         s390_ltgr (code, s390_r0, s390_r0);
3164                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3165                         PTRSLOT   (code, o[0]);
3166                         PTRSLOT   (code, o[1]);
3167                         s390_lgr  (code, ins->dreg, s390_r1);
3168                 }
3169                         break;
3170                 case OP_LMUL_OVF_UN:
3171                 case CEE_MUL_OVF_UN: {
3172                         s390_lghi  (code, s390_r0, 0);
3173                         s390_lgr   (code, s390_r1, ins->sreg1);
3174                         s390_mlgr  (code, s390_r0, ins->sreg2);
3175                         s390_ltgr  (code, s390_r0, s390_r0);
3176                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3177                         s390_lgr   (code, ins->dreg, s390_r1);
3178                 }
3179                         break;
3180                 case OP_IADDCC: {
3181                         g_assert_not_reached ();
3182                         CHECK_SRCDST_COM_I;
3183                         s390_algr (code, ins->dreg, src2);
3184                 }
3185                         break;
3186                 case OP_IADD: {
3187                         CHECK_SRCDST_COM_I;
3188                         s390_agr  (code, ins->dreg, src2);
3189                 }
3190                         break;
3191                 case OP_IADC: {
3192                         g_assert_not_reached ();
3193                         CHECK_SRCDST_COM_I;
3194                         s390_alcgr (code, ins->dreg, src2);
3195                 }
3196                         break;
3197                 case OP_IADD_IMM: {
3198                         if (ins->dreg != ins->sreg1) {
3199                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3200                         }
3201                         if (s390_is_imm16 (ins->inst_imm)) {
3202                                 s390_aghi(code, ins->dreg, ins->inst_imm);
3203                         } else {
3204                                 s390_basr (code, s390_r13, 0);
3205                                 s390_j    (code, 4);
3206                                 s390_word (code, ins->inst_imm);
3207                                 s390_agf  (code, ins->dreg, 0, s390_r13, 4);
3208                         }
3209                 }
3210                         break;
3211                 case OP_IADC_IMM: {
3212                         if (ins->dreg != ins->sreg1) {
3213                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3214                         }
3215                         if (s390_is_imm16 (ins->inst_imm)) {
3216                                 s390_lghi  (code, s390_r0, ins->inst_imm);
3217                                 s390_alcgr (code, ins->dreg, s390_r0);
3218                         } else {
3219                                 s390_basr  (code, s390_r13, 0);
3220                                 s390_j     (code, 4);
3221                                 s390_word  (code, ins->inst_imm);
3222                                 s390_lgf   (code, s390_r13, 0, s390_r13, 4);
3223                                 s390_alcgr (code, ins->dreg, s390_r13);
3224                         }
3225                 }
3226                         break;
3227                 case CEE_ADD_OVF: {
3228                         CHECK_SRCDST_COM;
3229                         s390_ar    (code, ins->dreg, src2);
3230                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3231                         s390_lgfr  (code, ins->dreg, ins->dreg);
3232                 }
3233                         break;
3234                 case CEE_ADD_OVF_UN: {
3235                         CHECK_SRCDST_COM;
3236                         s390_algr  (code, ins->dreg, src2);
3237                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
3238                         s390_llgfr (code, ins->dreg, ins->dreg);
3239                 }
3240                         break;
3241                 case OP_ISUBCC: {
3242                         CHECK_SRCDST_NCOM_I;
3243                         s390_slgr (code, ins->dreg, src2);
3244                 }
3245                         break;
3246                 case OP_ISUB: {
3247                         CHECK_SRCDST_NCOM_I;
3248                         s390_sgr  (code, ins->dreg, src2);
3249                 }
3250                         break;
3251                 case OP_ISBB: {
3252                         CHECK_SRCDST_NCOM_I;
3253                         s390_slbgr (code, ins->dreg, src2);
3254                 }
3255                         break;
3256                 case OP_ISUB_IMM: {
3257                         if (ins->dreg != ins->sreg1) {
3258                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3259                         }
3260                         if (s390_is_imm16 (-ins->inst_imm)) {
3261                                 s390_aghi (code, ins->dreg, -ins->inst_imm);
3262                         } else {
3263                                 s390_basr (code, s390_r13, 0);
3264                                 s390_j    (code, 4);
3265                                 s390_word (code, ins->inst_imm);
3266                                 s390_sgf  (code, ins->dreg, 0, s390_r13, 4);
3267                         }
3268                 }
3269                         break;
3270                 case OP_ISBB_IMM: {
3271                         s390_basr (code, s390_r13, 0);
3272                         s390_j    (code, 4);
3273                         s390_word (code, ins->inst_imm);
3274                         s390_slgf (code, ins->dreg, 0, s390_r13, 4);
3275                 }
3276                         break;
3277                 case CEE_SUB_OVF: {
3278                         CHECK_SRCDST_NCOM;
3279                         s390_sr   (code, ins->dreg, src2);
3280                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3281                         s390_lgfr (code, ins->dreg, ins->dreg);
3282                 }
3283                         break;
3284                 case CEE_SUB_OVF_UN: {
3285                         CHECK_SRCDST_NCOM;
3286                         s390_slr  (code, ins->dreg, src2);
3287                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
3288                         s390_llgfr(code, ins->dreg, ins->dreg);
3289                 }
3290                         break;
3291                 case OP_IAND: {
3292                         CHECK_SRCDST_NCOM_I;
3293                         s390_ngr (code, ins->dreg, src2);
3294                 }
3295                         break;
3296                 case OP_IAND_IMM: {
3297                         if (ins->dreg != ins->sreg1) {
3298                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3299                         }
3300                         if (s390_is_imm16 (ins->inst_imm)) {
3301                                 s390_lghi (code, s390_r0, ins->inst_imm);
3302                                 s390_ngr  (code, ins->dreg, s390_r0);
3303                         } else {
3304                                 s390_basr (code, s390_r13, 0);
3305                                 s390_j    (code, 6);
3306                                 s390_llong(code, ins->inst_imm);
3307                                 s390_ng   (code, ins->dreg, 0, s390_r13, 4);
3308                         }
3309                 }
3310                         break;
3311                 case OP_IDIV: {
3312                         s390_lgfr (code, s390_r0, ins->sreg1);
3313                         s390_srda (code, s390_r0, 0, 32);
3314                         s390_dr   (code, s390_r0, ins->sreg2);
3315                         s390_lgfr (code, ins->dreg, s390_r1);
3316                 }
3317                         break;
3318                 case OP_IDIV_UN: {
3319                         s390_lgfr (code, s390_r0, ins->sreg1);
3320                         s390_srdl (code, s390_r0, 0, 32);
3321                         s390_dlr  (code, s390_r0, ins->sreg2);
3322                         s390_lgfr (code, ins->dreg, s390_r1);
3323                 }
3324                         break;
3325                 case OP_IDIV_IMM: {
3326                         if (s390_is_imm16 (ins->inst_imm)) {
3327                                 s390_lghi (code, s390_r13, ins->inst_imm);
3328                                 s390_lgfr (code, s390_r0, ins->sreg1);
3329                         } else {
3330                                 s390_basr (code, s390_r13, 0);
3331                                 s390_j    (code, 4);
3332                                 s390_word (code, ins->inst_imm);
3333                                 s390_lgfr (code, s390_r0, ins->sreg1);
3334                                 s390_lgf  (code, s390_r13, 0, s390_r13, 4);
3335                         }
3336                         s390_srda (code, s390_r0, 0, 32);
3337                         s390_dr   (code, s390_r0, ins->sreg2);
3338                         s390_lgfr (code, ins->dreg, s390_r1);
3339                 }
3340                         break;
3341                 case OP_IREM: {
3342                         s390_lgfr (code, s390_r0, ins->sreg1);
3343                         s390_srda (code, s390_r0, 0, 32);
3344                         s390_dr   (code, s390_r0, ins->sreg2);
3345                         s390_lgfr (code, ins->dreg, s390_r0);
3346                         break;
3347                 case OP_IREM_UN:
3348                         s390_lgfr (code, s390_r0, ins->sreg1);
3349                         s390_srdl (code, s390_r0, 0, 32);
3350                         s390_dlr  (code, s390_r0, ins->sreg2);
3351                         s390_lgfr (code, ins->dreg, s390_r0);
3352                 }
3353                         break;
3354                 case OP_IREM_IMM: {
3355                         if (s390_is_imm16 (ins->inst_imm)) {
3356                                 s390_lghi (code, s390_r13, ins->inst_imm);
3357                                 s390_lgfr (code, s390_r0, ins->sreg1);
3358                         } else {
3359                                 s390_basr (code, s390_r13, 0);
3360                                 s390_j    (code, 4);
3361                                 s390_word (code, ins->inst_imm);
3362                                 s390_lgfr (code, s390_r0, ins->sreg1);
3363                                 s390_lgf  (code, s390_r13, 0, s390_r13, 4);
3364                         }
3365                         s390_srda (code, s390_r0, 0, 32);
3366                         s390_dr   (code, s390_r0, ins->sreg2);
3367                         s390_lgfr (code, ins->dreg, s390_r0);
3368                 }
3369                         break;
3370                 case OP_IOR: {
3371                         CHECK_SRCDST_COM_I;
3372                         s390_ogr (code, ins->dreg, src2);
3373                 }
3374                         break;
3375                 case OP_IOR_IMM: {
3376                         if (ins->dreg != ins->sreg1) {
3377                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3378                         }
3379                         if (s390_is_imm16 (ins->inst_imm)) {
3380                                 s390_lghi (code, s390_r0, ins->inst_imm);
3381                                 s390_ogr  (code, ins->dreg, s390_r0);
3382                         } else {
3383                                 s390_basr (code, s390_r13, 0);
3384                                 s390_j    (code, 6);
3385                                 s390_llong(code, ins->inst_imm);
3386                                 s390_og   (code, ins->dreg, 0, s390_r13, 4);
3387                         }
3388                 }
3389                         break;
3390                 case OP_IXOR: {
3391                         CHECK_SRCDST_COM_I;
3392                         s390_xgr (code, ins->dreg, src2);
3393                 }
3394                         break;
3395                 case OP_IXOR_IMM: {
3396                         if (ins->dreg != ins->sreg1) {
3397                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3398                         }
3399                         if (s390_is_imm16 (ins->inst_imm)) {
3400                                 s390_lghi (code, s390_r0, ins->inst_imm);
3401                                 s390_xgr  (code, ins->dreg, s390_r0);
3402                         } else {
3403                                 s390_basr (code, s390_r13, 0);
3404                                 s390_j    (code, 6);
3405                                 s390_llong(code, ins->inst_imm);
3406                                 s390_xg   (code, ins->dreg, 0, s390_r13, 4);
3407                         }
3408                 }
3409                         break;
3410                 case OP_ISHL: {
3411                         if (ins->sreg1 != ins->dreg) {
3412                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3413                         }
3414                         s390_sll  (code, ins->dreg, ins->sreg2, 0);
3415                 }
3416                         break;
3417                 case OP_ISHL_IMM: {
3418                         if (ins->sreg1 != ins->dreg) {
3419                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3420                         }
3421                         s390_sll (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3422                 }
3423                         break;
3424                 case OP_ISHR: {
3425                         if (ins->sreg1 != ins->dreg) {
3426                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3427                         }
3428                         s390_sra (code, ins->dreg, ins->sreg2, 0);
3429                 }
3430                         break;
3431                 case OP_ISHR_IMM: {
3432                         if (ins->sreg1 != ins->dreg) {
3433                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3434                         }
3435                         s390_sra (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3436                 }
3437                         break;
3438                 case OP_ISHR_UN_IMM: {
3439                         if (ins->sreg1 != ins->dreg) {
3440                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3441                         }
3442                         s390_srl (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3443                 }
3444                         break;
3445                 case OP_ISHR_UN: {
3446                         if (ins->sreg1 != ins->dreg) {
3447                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3448                         }
3449                         s390_srl  (code, ins->dreg, ins->sreg2, 0);
3450                 }
3451                         break;
3452                 case OP_INOT: {
3453                         if (ins->sreg1 != ins->dreg) {
3454                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3455                         }
3456                         s390_lghi (code, s390_r0, -1);
3457                         s390_xgr  (code, ins->dreg, s390_r0);
3458                 }
3459                         break;
3460                 case OP_INEG: {
3461                         s390_lcgr (code, ins->dreg, ins->sreg1);
3462                 }
3463                         break;
3464                 case OP_IMUL: {
3465                         CHECK_SRCDST_COM_I;
3466                         s390_msr (code, ins->dreg, src2);
3467                 }
3468                         break;
3469                 case OP_IMUL_IMM: {
3470                         if (ins->dreg != ins->sreg1) {
3471                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3472                         }
3473                         if (s390_is_imm16 (ins->inst_imm)) {
3474                                 s390_lghi (code, s390_r13, ins->inst_imm);
3475                         } else {
3476                                 s390_basr (code, s390_r13, 0);
3477                                 s390_j    (code, 4);
3478                                 s390_word (code, ins->inst_imm);
3479                                 s390_lgf  (code, s390_r13, 0, s390_r13, 4);
3480                         }
3481                         s390_msr  (code, ins->dreg, s390_r13);
3482                 }
3483                         break;
3484                 case OP_IMUL_OVF: {
3485                         short int *o[2];
3486                         s390_ltr  (code, s390_r1, ins->sreg1);
3487                         s390_jz   (code, 0); CODEPTR(code, o[0]);
3488                         s390_ltr  (code, s390_r0, ins->sreg2);
3489                         s390_jnz  (code, 6);
3490                         s390_lhi  (code, s390_r1, 0);
3491                         s390_j    (code, 0); CODEPTR(code, o[1]);
3492                         s390_xr   (code, s390_r0, s390_r1);
3493                         s390_msr  (code, s390_r1, ins->sreg2);
3494                         s390_xr   (code, s390_r0, s390_r1);
3495                         s390_srl  (code, s390_r0, 0, 31);
3496                         s390_ltr  (code, s390_r0, s390_r0);
3497                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3498                         PTRSLOT   (code, o[0]);
3499                         PTRSLOT   (code, o[1]);
3500                         s390_lgfr (code, ins->dreg, s390_r1);
3501                 }
3502                         break;
3503                 case OP_IMUL_OVF_UN: {
3504                         s390_lhi  (code, s390_r0, 0);
3505                         s390_lr   (code, s390_r1, ins->sreg1);
3506                         s390_mlr  (code, s390_r0, ins->sreg2);
3507                         s390_ltr  (code, s390_r0, s390_r0);
3508                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3509                         s390_lgfr (code, ins->dreg, s390_r1);
3510                 }
3511                         break;
3512                 case OP_ICONST:
3513                 case OP_I8CONST:
3514                 case OP_SETREGIMM: {
3515                         if (s390_is_imm16(ins->inst_c0)) {
3516                                 s390_lghi (code, ins->dreg, ins->inst_c0);
3517                         } else {
3518                                 s390_basr (code, s390_r13, 0);
3519                                 s390_j    (code, 6);
3520                                 s390_llong(code, ins->inst_c0);
3521                                 s390_lg   (code, ins->dreg, 0, s390_r13, 4);
3522                         }
3523                 }
3524                         break;
3525                 case OP_AOTCONST: {
3526                         s390_basr (code, s390_r13, 0);
3527                         s390_j    (code, 6);
3528                         mono_add_patch_info (cfg, code - cfg->native_code,
3529                                 (MonoJumpInfoType)ins->inst_i1, ins->inst_p0);
3530                         s390_llong(code, 0);
3531                         s390_lg   (code,ins->dreg, 0, s390_r13, 4);
3532                 }
3533                         break;
3534                 case CEE_CONV_I:
3535                 case CEE_CONV_I8:
3536                 case OP_MOVE:
3537                 case OP_SETREG: {
3538                         if (ins->dreg != ins->sreg1) {
3539                                 s390_lgr (code, ins->dreg, ins->sreg1);
3540                         }
3541                 }
3542                         break;
3543                 case CEE_CONV_I4:
3544                         s390_lgfr (code, ins->dreg, ins->sreg1);
3545                         break;
3546                 case CEE_CONV_U:
3547                 case CEE_CONV_U8:
3548                 case CEE_CONV_U4:
3549                         s390_llgfr (code, ins->dreg, ins->sreg1);
3550                         break;
3551                 case CEE_CONV_OVF_U4:
3552                         s390_basr (code, s390_r13, 0);
3553                         s390_j    (code, 6);
3554                         s390_llong(code, 4294967295);
3555                         s390_clg  (code, ins->sreg1, 0, s390_r13, 4);
3556                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GT, "OverflowException");
3557                         s390_ltgr (code, ins->sreg1, ins->sreg1);
3558                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, "OverflowException");
3559                         s390_llgfr(code, ins->dreg, ins->sreg1);
3560                         break;
3561                 case CEE_CONV_OVF_I4_UN:
3562                         s390_basr (code, s390_r13, 0);
3563                         s390_j    (code, 6);
3564                         s390_llong(code, 2147483647);
3565                         s390_cg   (code, ins->sreg1, 0, s390_r13, 4);
3566                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GT, "OverflowException");
3567                         s390_ltgr (code, ins->sreg1, ins->sreg1);
3568                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, "OverflowException");
3569                         s390_lgfr (code, ins->dreg, ins->sreg1);
3570                         break;
3571                 case OP_SETFREG:
3572                 case OP_FMOVE: {
3573                         if (ins->dreg != ins->sreg1) {
3574                                 s390_ldr   (code, ins->dreg, ins->sreg1);
3575                         }
3576                 }
3577                         break;
3578                 case OP_S390_SETF4RET: {
3579                         s390_ledbr (code, ins->dreg, ins->sreg1);
3580                 }
3581                         break;
3582                 case OP_FCONV_TO_R4: {
3583                         g_error ("Shouldn't be reached");
3584                         if ((ins->next) &&
3585                             (ins->next->opcode != OP_FMOVE) &&
3586                             (ins->next->opcode != OP_STORER4_MEMBASE_REG))
3587                                 s390_ledbr (code, ins->dreg, ins->sreg1);
3588                 }
3589                         break;
3590                 case CEE_JMP: {
3591                         if (cfg->method->save_lmf)
3592                                 restoreLMF(code, cfg->frame_reg, cfg->stack_usage);
3593
3594                         if (cfg->flags & MONO_CFG_HAS_TAIL) {
3595                                 code =  emit_load_volatile_registers(code, cfg);
3596                         }
3597
3598                         code = backUpStackPtr(cfg, code);
3599                         s390_lg  (code, s390_r14, 0, STK_BASE, S390_RET_ADDR_OFFSET);
3600                         mono_add_patch_info (cfg, code - cfg->native_code,
3601                                              MONO_PATCH_INFO_METHOD_JUMP,
3602                                              ins->inst_p0);
3603                         s390_jcl (code, S390_CC_UN, 0);
3604                 }
3605                         break;
3606                 case OP_CHECK_THIS: {
3607                         /* ensure ins->sreg1 is not NULL */
3608                         s390_lg   (code, s390_r0, 0, ins->sreg1, 0);
3609                         s390_ltgr (code, s390_r0, s390_r0);
3610                 }
3611                         break;
3612                 case OP_ARGLIST: {
3613                         int offset = cfg->sig_cookie + cfg->stack_usage;
3614
3615                         if (s390_is_imm16 (offset))
3616                                 s390_lghi (code, s390_r0, offset);
3617                         else {
3618                                 s390_basr (code, s390_r13, 0);
3619                                 s390_j    (code, 6);
3620                                 s390_llong(code, offset);
3621                                 s390_lg   (code, s390_r0, 0, s390_r13, 0);
3622                         }
3623                         s390_agr  (code, s390_r0, cfg->frame_reg);
3624                         s390_stg  (code, s390_r0, 0, ins->sreg1, 0);
3625                 }
3626                         break;
3627                 case OP_FCALL: {
3628                         s390_basr (code, s390_r13, 0);
3629                         s390_j    (code, 6);
3630                         call = (MonoCallInst*)ins;
3631                         if (ins->flags & MONO_INST_HAS_METHOD)
3632                                 mono_add_patch_info (cfg, code-cfg->native_code,
3633                                                      MONO_PATCH_INFO_METHOD,
3634                                                      call->method);
3635                         else
3636                                 mono_add_patch_info (cfg, code-cfg->native_code,
3637                                                      MONO_PATCH_INFO_ABS,
3638                                                      call->fptr);
3639                         s390_llong(code, 0);
3640                         s390_lg   (code, s390_r14, 0, s390_r13, 4);
3641                         s390_basr (code, s390_r14, s390_r14);
3642                         if (call->signature->ret->type == MONO_TYPE_R4)
3643                                 s390_ldebr (code, s390_f0, s390_f0);
3644                 }
3645                         break;
3646                 case OP_LCALL:
3647                 case OP_VCALL:
3648                 case OP_VOIDCALL:
3649                 case CEE_CALL: {
3650                         s390_basr (code, s390_r13, 0);
3651                         s390_j    (code, 6);
3652                         call = (MonoCallInst*)ins;
3653                         if (ins->flags & MONO_INST_HAS_METHOD)
3654                                 mono_add_patch_info (cfg, code-cfg->native_code,
3655                                                      MONO_PATCH_INFO_METHOD,
3656                                                      call->method);
3657                         else
3658                                 mono_add_patch_info (cfg, code-cfg->native_code,
3659                                                      MONO_PATCH_INFO_ABS,
3660                                                      call->fptr);
3661                         s390_llong(code, 0);
3662                         s390_lg   (code, s390_r14, 0, s390_r13, 4);
3663                         s390_basr (code, s390_r14, s390_r14);
3664                 }
3665                         break;
3666                 case OP_FCALL_REG: {
3667                         call = (MonoCallInst*)ins;
3668                         s390_lgr  (code, s390_r1, ins->sreg1);
3669                         s390_basr (code, s390_r14, s390_r1);
3670                         if (call->signature->ret->type == MONO_TYPE_R4)
3671                                 s390_ldebr (code, s390_f0, s390_f0);
3672                 }
3673                         break;
3674                 case OP_LCALL_REG:
3675                 case OP_VCALL_REG:
3676                 case OP_VOIDCALL_REG:
3677                 case OP_CALL_REG: {
3678                         s390_lgr  (code, s390_r1, ins->sreg1);
3679                         s390_basr (code, s390_r14, s390_r1);
3680                 }
3681                         break;
3682                 case OP_FCALL_MEMBASE: {
3683                         call = (MonoCallInst*)ins;
3684                         s390_lg   (code, s390_r1, 0, ins->sreg1, ins->inst_offset);
3685                         s390_basr (code, s390_r14, s390_r1);
3686                         if (call->signature->ret->type == MONO_TYPE_R4)
3687                                 s390_ldebr (code, s390_f0, s390_f0);
3688                 }
3689                         break;
3690                 case OP_LCALL_MEMBASE:
3691                 case OP_VCALL_MEMBASE:
3692                 case OP_VOIDCALL_MEMBASE:
3693                 case OP_CALL_MEMBASE: {
3694                         s390_lg   (code, s390_r1, 0, ins->sreg1, ins->inst_offset);
3695                         s390_basr (code, s390_r14, s390_r1);
3696                 }
3697                         break;
3698                 case OP_OUTARG:
3699                         g_assert_not_reached ();
3700                         break;
3701                 case OP_LOCALLOC: {
3702                         int alloca_skip = S390_MINIMAL_STACK_SIZE + cfg->param_area;
3703                         int area_offset = S390_ALIGN(alloca_skip, S390_STACK_ALIGNMENT);
3704                         s390_lgr  (code, s390_r1, ins->sreg1);
3705                         if (ins->flags & MONO_INST_INIT)
3706                                 s390_lgr  (code, s390_r0, ins->sreg1);
3707                         s390_aghi (code, s390_r1, 14);
3708                         s390_srlg (code, s390_r1, s390_r1, 0, 3);
3709                         s390_sllg (code, s390_r1, s390_r1, 0, 3);
3710                         if (cfg->method->save_lmf) {
3711                                 /*----------------------------------*/
3712                                 /* we have to adjust lmf ebp value  */
3713                                 /*----------------------------------*/
3714                                 int lmfOffset = cfg->stack_usage - sizeof(MonoLMF);
3715
3716                                 s390_lgr (code, s390_r13, cfg->frame_reg);
3717                                 if (s390_is_uimm16(lmfOffset))
3718                                         s390_aghi (code, s390_r13, lmfOffset);
3719                                 else {
3720                                         s390_basr (code, s390_r14, 0);
3721                                         s390_j    (code, 4);
3722                                         s390_word (code, lmfOffset);
3723                                         s390_agf  (code, s390_r13, 0, s390_r14, 4);
3724                                 }
3725                                 s390_lgr (code, s390_r14, STK_BASE);
3726                                 s390_sgr (code, s390_r14, s390_r1);
3727                                 s390_stg (code, s390_r14, 0, s390_r13,
3728                                           G_STRUCT_OFFSET(MonoLMF, ebp));
3729                         }
3730                         s390_lg   (code, s390_r13, 0, STK_BASE, 0);
3731                         s390_sgr  (code, STK_BASE, s390_r1);
3732                         s390_stg  (code, s390_r13, 0, STK_BASE, 0);
3733                         s390_la   (code, ins->dreg, 0, STK_BASE, area_offset);
3734                         s390_srlg (code, ins->dreg, ins->dreg, 0, 3);
3735                         s390_sllg (code, ins->dreg, ins->dreg, 0, 3);
3736                         if (ins->flags & MONO_INST_INIT) {
3737                                 s390_lgr  (code, s390_r1, s390_r0);
3738                                 s390_lgr  (code, s390_r0, ins->dreg);
3739                                 s390_lgr  (code, s390_r14, s390_r12);
3740                                 s390_lghi (code, s390_r13, 0);
3741                                 s390_mvcle(code, s390_r0, s390_r12, 0, 0);
3742                                 s390_jo   (code, -2);
3743                                 s390_lgr  (code, s390_r12, s390_r14);
3744                         }
3745                 }
3746                         break;
3747                 case CEE_RET: {
3748                         s390_br  (code, s390_r14);
3749                 }
3750                         break;
3751                 case CEE_THROW: {
3752                         s390_lgr  (code, s390_r2, ins->sreg1);
3753                         s390_basr (code, s390_r13, 0);
3754                         s390_j    (code, 6);
3755                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD,
3756                                              (gpointer) "mono_arch_throw_exception");
3757                         s390_llong(code, 0);
3758                         s390_lg   (code, s390_r14, 0, s390_r13, 4);
3759                         s390_basr (code, s390_r14, s390_r14);
3760                 }
3761                         break;
3762                 case OP_RETHROW: {
3763                         s390_lgr  (code, s390_r2, ins->sreg1);
3764                         s390_basr (code, s390_r13, 0);
3765                         s390_j    (code, 6);
3766                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD,
3767                                              (gpointer) "mono_arch_rethrow_exception");
3768                         s390_llong(code, 0);
3769                         s390_lg   (code, s390_r14, 0, s390_r13, 4);
3770                         s390_basr (code, s390_r14, s390_r14);
3771                 }
3772                         break;
3773                 case OP_START_HANDLER: {
3774                         if (s390_is_uimm20 (ins->inst_left->inst_offset)) {
3775                                 s390_stg  (code, s390_r14, 0,
3776                                            ins->inst_left->inst_basereg,
3777                                            ins->inst_left->inst_offset);
3778                         } else {
3779                                 s390_basr (code, s390_r13, 0);
3780                                 s390_j    (code, 6);
3781                                 s390_llong(code, ins->inst_left->inst_offset);
3782                                 s390_lg   (code, s390_r13, 0, s390_r13, 4);
3783                                 s390_stg  (code, s390_r14, s390_r13,
3784                                            ins->inst_left->inst_basereg, 0);
3785                         }
3786                 }
3787                         break;
3788                 case OP_ENDFILTER: {
3789                         if (ins->sreg1 != s390_r2)
3790                                 s390_lgr(code, s390_r2, ins->sreg1);
3791                         if (s390_is_uimm20 (ins->inst_left->inst_offset)) {
3792                                 s390_lg (code, s390_r14, 0, ins->inst_left->inst_basereg,
3793                                          ins->inst_left->inst_offset);
3794                         } else {
3795                                 s390_basr (code, s390_r13, 0);
3796                                 s390_j    (code, 6);
3797                                 s390_llong(code, ins->inst_left->inst_offset);
3798                                 s390_lg   (code, s390_r13, 0, s390_r13, 4);
3799                                 s390_lg   (code, s390_r14, s390_r13,
3800                                            ins->inst_left->inst_basereg, 0);
3801                         }
3802                         s390_br  (code, s390_r14);
3803                 }
3804                         break;
3805                 case CEE_ENDFINALLY: {
3806                         if (s390_is_uimm20 (ins->inst_left->inst_offset)) {
3807                                 s390_lg (code, s390_r14, 0, ins->inst_left->inst_basereg,
3808                                          ins->inst_left->inst_offset);
3809                         } else {
3810                                 s390_basr (code, s390_r13, 0);
3811                                 s390_j    (code, 6);
3812                                 s390_llong(code, ins->inst_left->inst_offset);
3813                                 s390_lg   (code, s390_r13, 0, s390_r13, 4);
3814                                 s390_lg   (code, s390_r14, s390_r13,
3815                                            ins->inst_left->inst_basereg, 0);
3816                         }
3817                         s390_br  (code, s390_r14);
3818                 }
3819                         break;
3820                 case OP_CALL_HANDLER: {
3821                         mono_add_patch_info (cfg, code-cfg->native_code,
3822                                              MONO_PATCH_INFO_BB, ins->inst_target_bb);
3823                         s390_brasl (code, s390_r14, 0);
3824                 }
3825                         break;
3826                 case OP_LABEL: {
3827                         ins->inst_c0 = code - cfg->native_code;
3828                 }
3829                         break;
3830                 case CEE_BR:
3831                         EMIT_UNCOND_BRANCH(ins);
3832                         break;
3833                 case OP_BR_REG: {
3834                         s390_br  (code, ins->sreg1);
3835                 }
3836                         break;
3837                 case OP_CEQ:
3838                 case OP_ICEQ: {
3839                         s390_lghi(code, ins->dreg, 1);
3840                         s390_jz  (code, 4);
3841                         s390_lghi(code, ins->dreg, 0);
3842                 }
3843                         break;
3844                 case OP_CLT:
3845                 case OP_ICLT: {
3846                         s390_lghi(code, ins->dreg, 1);
3847                         s390_jl  (code, 4);
3848                         s390_lghi(code, ins->dreg, 0);
3849                 }
3850                         break;
3851                 case OP_CLT_UN:
3852                 case OP_ICLT_UN: {
3853                         s390_lghi(code, ins->dreg, 1);
3854                         s390_jlo (code, 4);
3855                         s390_lghi(code, ins->dreg, 0);
3856                 }
3857                         break;
3858                 case OP_CGT:
3859                 case OP_ICGT: {
3860                         s390_lghi(code, ins->dreg, 1);
3861                         s390_jh  (code, 4);
3862                         s390_lghi(code, ins->dreg, 0);
3863                 }
3864                         break;
3865                 case OP_CGT_UN:
3866                 case OP_ICGT_UN: {
3867                         s390_lghi(code, ins->dreg, 1);
3868                         s390_jho (code, 4);
3869                         s390_lghi(code, ins->dreg, 0);
3870                 }
3871                         break;
3872                 case OP_COND_EXC_EQ:
3873                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_EQ, ins->inst_p1);
3874                         break;
3875                 case OP_COND_EXC_NE_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_LT_UN:
3880                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, ins->inst_p1);
3881                         break;
3882                 case OP_COND_EXC_GT:
3883                 case OP_COND_EXC_GT_UN:
3884                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GT, ins->inst_p1);
3885                         break;
3886                 case OP_COND_EXC_GE:
3887                 case OP_COND_EXC_GE_UN:
3888                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GE, ins->inst_p1);
3889                         break;
3890                 case OP_COND_EXC_LE:
3891                 case OP_COND_EXC_LE_UN:
3892                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LE, ins->inst_p1);
3893                         break;
3894                 case OP_COND_EXC_OV:
3895                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, ins->inst_p1);
3896                         break;
3897                 case OP_COND_EXC_NO:
3898                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NO, ins->inst_p1);
3899                         break;
3900                 case OP_COND_EXC_C:
3901                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, ins->inst_p1);
3902                         break;
3903                 case OP_COND_EXC_NC:
3904                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, ins->inst_p1);
3905                         break;
3906                 case CEE_BEQ:
3907                 case OP_IBEQ:
3908                         EMIT_COND_BRANCH (ins, S390_CC_EQ);
3909                         break;
3910                 case CEE_BNE_UN:
3911                 case OP_IBNE_UN:
3912                         EMIT_COND_BRANCH (ins, S390_CC_NE);
3913                         break;
3914                 case CEE_BLT:
3915                 case CEE_BLT_UN:
3916                 case OP_IBLT:
3917                 case OP_IBLT_UN:
3918                         EMIT_COND_BRANCH (ins, S390_CC_LT);
3919                         break;
3920                 case CEE_BGT:
3921                 case CEE_BGT_UN:
3922                 case OP_IBGT:
3923                 case OP_IBGT_UN:
3924                         EMIT_COND_BRANCH (ins, S390_CC_GT);
3925                         break;
3926                 case CEE_BGE:
3927                 case CEE_BGE_UN:
3928                 case OP_IBGE:
3929                 case OP_IBGE_UN:
3930                         EMIT_COND_BRANCH (ins, S390_CC_GE);
3931                         break;
3932                 case CEE_BLE:
3933                 case CEE_BLE_UN:
3934                 case OP_IBLE:
3935                 case OP_IBLE_UN:
3936                         EMIT_COND_BRANCH (ins, S390_CC_LE);
3937                         break;
3938
3939                 /* floating point opcodes */
3940                 case OP_R8CONST: {
3941                         if (*((float *) ins->inst_p0) == 0) {
3942                                 s390_lzdr (code, ins->dreg);
3943                         } else {
3944                                 s390_basr  (code, s390_r13, 0);
3945                                 s390_j     (code, 6);
3946                                 s390_llong (code, ins->inst_p0);
3947                                 s390_lg    (code, s390_r13, 0, s390_r13, 4);
3948                                 s390_ld    (code, ins->dreg, 0, s390_r13, 0);
3949                         }
3950                 }
3951                         break;
3952                 case OP_R4CONST: {
3953                         if (*((float *) ins->inst_p0) == 0) {
3954                                 s390_lzdr (code, ins->dreg);
3955                         } else {
3956                                 s390_basr (code, s390_r13, 0);
3957                                 s390_j    (code, 6);
3958                                 s390_llong(code, ins->inst_p0);
3959                                 s390_lg   (code, s390_r13, 0, s390_r13, 4);
3960                                 s390_ldeb (code, ins->dreg, 0, s390_r13, 0);
3961                         }
3962                 }
3963                         break;
3964                 case OP_STORER8_MEMBASE_REG: {
3965                         if (s390_is_uimm20(ins->inst_offset)) {
3966                                 s390_stdy (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
3967                         } else {
3968                                 s390_basr (code, s390_r13, 0);
3969                                 s390_j    (code, 6);
3970                                 s390_llong(code, ins->inst_offset);
3971                                 s390_lg   (code, s390_r13, 0, s390_r13, 4);
3972                                 s390_std  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
3973                         }
3974                 }
3975                         break;
3976                 case OP_LOADR8_MEMBASE: {
3977                         if (s390_is_uimm20(ins->inst_offset)) {
3978                                 s390_ldy  (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
3979                         } else {
3980                                 s390_basr (code, s390_r13, 0);
3981                                 s390_j    (code, 6);
3982                                 s390_llong(code, ins->inst_offset);
3983                                 s390_lg   (code, s390_r13, 0, s390_r13, 4);
3984                                 s390_ld   (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
3985                         }
3986                 }
3987                         break;
3988                 case OP_STORER4_MEMBASE_REG: {
3989                         if (s390_is_uimm20(ins->inst_offset)) {
3990                                 s390_ledbr(code, s390_f15, ins->sreg1);
3991                                 s390_stey (code, s390_f15, 0, ins->inst_destbasereg, ins->inst_offset);
3992                         } else {
3993                                 s390_basr (code, s390_r13, 0);
3994                                 s390_j    (code, 6);
3995                                 s390_llong(code, ins->inst_offset);
3996                                 s390_lg   (code, s390_r13, 0, s390_r13, 4);
3997                                 s390_ledbr(code, s390_f15, ins->sreg1);
3998                                 s390_ste  (code, s390_f15, s390_r13, ins->inst_destbasereg, 0);
3999                         }
4000                 }
4001                         break;
4002                 case OP_LOADR4_MEMBASE: {
4003                         if (s390_is_uimm20(ins->inst_offset)) {
4004                                 s390_ldy   (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
4005                                 s390_ldebr (code, ins->dreg, ins->dreg);
4006                         } else {
4007                                 s390_basr (code, s390_r13, 0);
4008                                 s390_j    (code, 6);
4009                                 s390_llong(code, ins->inst_offset);
4010                                 s390_lg   (code, s390_r13, 0, s390_r13, 4);
4011                                 s390_ldeb (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
4012                         }
4013                 }
4014                         break;
4015                 case CEE_CONV_R_UN: {
4016                         s390_cdfbr (code, ins->dreg, ins->sreg1);
4017                         s390_ltgr  (code, ins->sreg1, ins->sreg1);
4018                         s390_jnl   (code, 12);
4019                         s390_basr  (code, s390_r13, 0);
4020                         s390_j     (code, 6);
4021                         s390_word  (code, 0x41f00000);
4022                         s390_word  (code, 0);
4023                         s390_adb   (code, ins->dreg, 0, s390_r13, 4);
4024                 }
4025                         break;
4026                 case OP_LCONV_TO_R4:
4027                 case CEE_CONV_R4: {
4028                         s390_cdgbr (code, ins->dreg, ins->sreg1);
4029                 }
4030                         break;
4031                 case OP_LCONV_TO_R8:
4032                 case CEE_CONV_R8: {
4033                         s390_cdgbr (code, ins->dreg, ins->sreg1);
4034                 }
4035                         break;
4036                 case OP_FCONV_TO_I1:
4037                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 1, TRUE);
4038                         break;
4039                 case OP_FCONV_TO_U1:
4040                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 1, FALSE);
4041                         break;
4042                 case OP_FCONV_TO_I2:
4043                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 2, TRUE);
4044                         break;
4045                 case OP_FCONV_TO_U2:
4046                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 2, FALSE);
4047                         break;
4048                 case OP_FCONV_TO_I4:
4049                 case OP_FCONV_TO_I:
4050                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 4, TRUE);
4051                         break;
4052                 case OP_FCONV_TO_U4:
4053                 case OP_FCONV_TO_U:
4054                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 4, FALSE);
4055                         break;
4056                 case OP_FCONV_TO_I8:
4057                         s390_cgdbr (code, ins->dreg, 5, ins->sreg1);
4058                         break;
4059                 case OP_FCONV_TO_U8:
4060                         g_assert_not_reached ();
4061                         /* Implemented as helper calls */
4062                         break;
4063                 case OP_LCONV_TO_R_UN:
4064                         g_assert_not_reached ();
4065                         /* Implemented as helper calls */
4066                         break;
4067                 case OP_LCONV_TO_OVF_I: {
4068                         /* Valid ints: 0xffffffff:8000000 to 00000000:0x7f000000 */
4069                         short int *o[5];
4070                         s390_ltgr (code, ins->sreg2, ins->sreg2);
4071                         s390_jnl  (code, 0); CODEPTR(code, o[0]);
4072                         s390_ltgr (code, ins->sreg1, ins->sreg1);
4073                         s390_jnl  (code, 0); CODEPTR(code, o[1]);
4074                         s390_lhi  (code, s390_r13, -1);
4075                         s390_cgr  (code, ins->sreg1, s390_r13);
4076                         s390_jnz  (code, 0); CODEPTR(code, o[2]);
4077                         if (ins->dreg != ins->sreg2)
4078                                 s390_lgr  (code, ins->dreg, ins->sreg2);
4079                         s390_j    (code, 0); CODEPTR(code, o[3]);
4080                         PTRSLOT(code, o[0]);
4081                         s390_jz   (code, 0); CODEPTR(code, o[4]);
4082                         PTRSLOT(code, o[1]);
4083                         PTRSLOT(code, o[2]);
4084                         mono_add_patch_info (cfg, code - cfg->native_code,
4085                                              MONO_PATCH_INFO_EXC, "OverflowException");
4086                         s390_brasl (code, s390_r14, 0);
4087                         PTRSLOT(code, o[3]);
4088                         PTRSLOT(code, o[4]);
4089                 }
4090                         break;
4091                 case OP_ABS: {
4092                         s390_lpdbr (code, ins->dreg, ins->sreg1);
4093                 }
4094                         break;
4095                 case OP_SQRT: {
4096                         s390_sqdbr (code, ins->dreg, ins->sreg1);
4097                 }
4098                         break;
4099                 case OP_FADD: {
4100                         CHECK_SRCDST_COM_F;
4101                         s390_adbr (code, ins->dreg, src2);
4102                 }
4103                         break;
4104                 case OP_FSUB: {
4105                         CHECK_SRCDST_NCOM_F;
4106                         s390_sdbr (code, ins->dreg, src2);
4107                 }
4108                         break;
4109                 case OP_FMUL: {
4110                         CHECK_SRCDST_COM_F;
4111                         s390_mdbr (code, ins->dreg, src2);
4112                 }
4113                         break;
4114                 case OP_FDIV: {
4115                         CHECK_SRCDST_NCOM_F;
4116                         s390_ddbr (code, ins->dreg, src2);
4117                 }
4118                         break;
4119                 case OP_FNEG: {
4120                         s390_lcdbr (code, ins->dreg, ins->sreg1);
4121                 }
4122                         break;
4123                 case OP_FREM: {
4124                         CHECK_SRCDST_NCOM_F;
4125                         s390_didbr (code, ins->dreg, src2, 5, s390_f15);
4126                 }
4127                         break;
4128                 case OP_FCOMPARE: {
4129                         s390_cdbr (code, ins->sreg1, ins->sreg2);
4130                 }
4131                         break;
4132                 case OP_FCEQ: {
4133                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4134                         s390_lghi  (code, ins->dreg, 1);
4135                         s390_je    (code, 4);
4136                         s390_lghi  (code, ins->dreg, 0);
4137                 }
4138                         break;
4139                 case OP_FCLT: {
4140                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4141                         s390_lghi  (code, ins->dreg, 1);
4142                         s390_jl    (code, 4);
4143                         s390_lghi  (code, ins->dreg, 0);
4144                 }
4145                         break;
4146                 case OP_FCLT_UN: {
4147                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4148                         s390_lghi  (code, ins->dreg, 1);
4149                         s390_jlo   (code, 4);
4150                         s390_lghi  (code, ins->dreg, 0);
4151                 }
4152                         break;
4153                 case OP_FCGT: {
4154                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4155                         s390_lghi  (code, ins->dreg, 1);
4156                         s390_jh    (code, 4);
4157                         s390_lghi  (code, ins->dreg, 0);
4158                 }
4159                         break;
4160                 case OP_FCGT_UN: {
4161                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4162                         s390_lghi  (code, ins->dreg, 1);
4163                         s390_jho   (code, 4);
4164                         s390_lghi  (code, ins->dreg, 0);
4165                 }
4166                         break;
4167                 case OP_FBEQ:
4168                         EMIT_COND_BRANCH (ins, S390_CC_EQ|S390_CC_OV);
4169                         break;
4170                 case OP_FBNE_UN:
4171                         EMIT_COND_BRANCH (ins, S390_CC_NE|S390_CC_OV);
4172                         break;
4173                 case OP_FBLT:
4174                         EMIT_COND_BRANCH (ins, S390_CC_LT);
4175                         break;
4176                 case OP_FBLT_UN:
4177                         EMIT_COND_BRANCH (ins, S390_CC_LT|S390_CC_OV);
4178                         break;
4179                 case OP_FBGT:
4180                         EMIT_COND_BRANCH (ins, S390_CC_GT);
4181                         break;
4182                 case OP_FBGT_UN:
4183                         EMIT_COND_BRANCH (ins, S390_CC_GT|S390_CC_OV);
4184                         break;
4185                 case OP_FBGE:
4186                         EMIT_COND_BRANCH (ins, S390_CC_GE);
4187                         break;
4188                 case OP_FBGE_UN:
4189                         EMIT_COND_BRANCH (ins, S390_CC_GE|S390_CC_OV);
4190                         break;
4191                 case OP_FBLE:
4192                         EMIT_COND_BRANCH (ins, S390_CC_LE);
4193                         break;
4194                 case OP_FBLE_UN:
4195                         EMIT_COND_BRANCH (ins, S390_CC_LE|S390_CC_OV);
4196                         break;
4197                 case CEE_CKFINITE: {
4198                         short *o;
4199                         s390_lhi  (code, s390_r13, 0x7f);
4200                         s390_tcdb (code, ins->sreg1, 0, s390_r13, 0);
4201                         s390_jz   (code, 0); CODEPTR(code, o);
4202                         mono_add_patch_info (cfg, code - cfg->native_code,
4203                                              MONO_PATCH_INFO_EXC, "ArithmeticException");
4204                         s390_brasl (code, s390_r14,0);
4205                         PTRSLOT(code, o);
4206                 }
4207                         break;
4208                 case OP_S390_MOVE: {
4209                         if (ins->unused > 0) {
4210                                 if (ins->unused <= 256) {
4211                                         s390_mvc  (code, ins->unused, ins->dreg,
4212                                                    ins->inst_offset, ins->sreg1, ins->inst_imm);
4213                                 } else {
4214                                         s390_lgr  (code, s390_r0, ins->dreg);
4215                                         if (s390_is_imm16 (ins->inst_offset)) {
4216                                                 s390_aghi (code, s390_r0, ins->inst_offset);
4217                                         } else {
4218                                                 s390_basr (code, s390_r13, 0);
4219                                                 s390_j    (code, 6);
4220                                                 s390_llong(code, ins->inst_offset);
4221                                                 s390_a    (code, s390_r0, 0, s390_r13, 4);
4222                                         }
4223                                         s390_lgr  (code, s390_r12, ins->sreg1);
4224                                         if (s390_is_imm16 (ins->inst_imm)) {
4225                                                 s390_aghi (code, s390_r12, ins->inst_imm);
4226                                         } else {
4227                                                 s390_basr (code, s390_r13, 0);
4228                                                 s390_j    (code, 6);
4229                                                 s390_llong(code, ins->inst_imm);
4230                                                 s390_ag   (code, s390_r12, 0, s390_r13, 4);
4231                                         }
4232                                         s390_lgr  (code, s390_r1, ins->sreg1);
4233                                         s390_lgr  (code, s390_r13, s390_r1);
4234                                         s390_mvcle(code, s390_r0, s390_r12, 0, 0);
4235                                         s390_jo   (code, -2);
4236                                 }
4237                         }
4238                 }
4239                         break;
4240                 case OP_ATOMIC_ADD_I8: {
4241                         s390_lgr (code, s390_r1, ins->sreg2);
4242                         s390_lg  (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4243                         s390_ag  (code, s390_r1, 0, ins->inst_basereg, ins->inst_offset);
4244                         s390_csg (code, s390_r0, s390_r0, ins->inst_basereg, ins->inst_offset);
4245                         s390_jnz (code, -11);
4246                         s390_lgr (code, ins->dreg, s390_r1);
4247                 }
4248                         break;
4249                 case OP_ATOMIC_ADD_NEW_I8: {
4250                         s390_lgr (code, s390_r1, ins->sreg2);
4251                         s390_lg  (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4252                         s390_ag  (code, s390_r1, 0, ins->inst_basereg, ins->inst_offset);
4253                         s390_csg (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
4254                         s390_jnz (code, -11);
4255                         s390_lgr (code, ins->dreg, s390_r1);
4256                 }
4257                         break;
4258                 case OP_ATOMIC_EXCHANGE_I8: {
4259                         s390_lg  (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4260                         s390_csg (code, s390_r0, ins->sreg2, ins->inst_basereg, ins->inst_offset);
4261                         s390_jnz (code, -6);
4262                         s390_lgr (code, ins->dreg, s390_r0);
4263                 }
4264                         break;
4265                 case OP_ATOMIC_ADD_I4: {
4266                         s390_lr  (code, s390_r1, ins->sreg2);
4267                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4268                         s390_a   (code, s390_r1, 0, ins->inst_basereg, ins->inst_offset);
4269                         s390_cs  (code, s390_r0, s390_r0, ins->inst_basereg, ins->inst_offset);
4270                         s390_jnz (code, -7);
4271                         s390_lr  (code, ins->dreg, s390_r1);
4272                 }
4273                         break;
4274                 case OP_ATOMIC_ADD_NEW_I4: {
4275                         s390_lr  (code, s390_r1, ins->sreg2);
4276                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4277                         s390_a   (code, s390_r1, 0, ins->inst_basereg, ins->inst_offset);
4278                         s390_cs  (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
4279                         s390_jnz (code, -7);
4280                         s390_lr  (code, ins->dreg, s390_r1);
4281                 }
4282                         break;
4283                 case OP_ATOMIC_EXCHANGE_I4: {
4284                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4285                         s390_cs  (code, s390_r0, ins->sreg2, ins->inst_basereg, ins->inst_offset);
4286                         s390_jnz (code, -4);
4287                         s390_lr  (code, ins->dreg, s390_r0);
4288                 }
4289                         break;
4290                 case OP_S390_BKCHAIN: {
4291                         s390_lgr  (code, ins->dreg, ins->sreg1);
4292                         if (s390_is_imm16 (cfg->stack_offset)) {
4293                                 s390_aghi (code, ins->dreg, cfg->stack_offset);
4294                         } else {
4295                                 s390_basr (code, s390_r13, 0);
4296                                 s390_j    (code, 6);
4297                                 s390_llong(code, cfg->stack_offset);
4298                                 s390_ag   (code, ins->dreg, 0, s390_r13, 4);
4299                         }
4300                 }
4301                         break;
4302                 case OP_MEMORY_BARRIER: {
4303                 }
4304                         break;
4305                 default:
4306                         g_warning ("unknown opcode %s in %s()\n", mono_inst_name (ins->opcode), __FUNCTION__);
4307                         g_assert_not_reached ();
4308                 }
4309
4310                 if ((cfg->opt & MONO_OPT_BRANCH) && ((code - cfg->native_code - offset) > max_len)) {
4311                         g_warning ("wrong maximal instruction length of instruction %s (expected %d, got %ld)",
4312                                    mono_inst_name (ins->opcode), max_len, code - cfg->native_code - offset);
4313                         g_assert_not_reached ();
4314                 }
4315
4316                 cpos += max_len;
4317
4318                 last_ins = ins;
4319                 last_offset = offset;
4320
4321                 ins = ins->next;
4322         }
4323
4324         cfg->code_len = code - cfg->native_code;
4325 }
4326
4327 /*========================= End of Function ========================*/
4328
4329 /*------------------------------------------------------------------*/
4330 /*                                                                  */
4331 /* Name         - mono_arch_register_lowlevel_calls                 */
4332 /*                                                                  */
4333 /* Function     - Register routines to help with --trace operation. */
4334 /*                                                                  */
4335 /*------------------------------------------------------------------*/
4336
4337 void
4338 mono_arch_register_lowlevel_calls (void)
4339 {
4340         mono_register_jit_icall (mono_arch_break, "mono_arch_break", NULL, TRUE);
4341         mono_register_jit_icall (mono_arch_get_lmf_addr, "mono_arch_get_lmf_addr", NULL, TRUE);
4342 }
4343
4344 /*========================= End of Function ========================*/
4345
4346 /*------------------------------------------------------------------*/
4347 /*                                                                  */
4348 /* Name         - mono_arch_break                                   */
4349 /*                                                                  */
4350 /* Function     - Process a "break" operation for debugging.        */
4351 /*                                                                  */
4352 /*------------------------------------------------------------------*/
4353
4354 static void
4355 mono_arch_break(void) {
4356 }
4357
4358 /*========================= End of Function ========================*/
4359
4360 /*------------------------------------------------------------------*/
4361 /*                                                                  */
4362 /* Name         - mono_arch_patch_code                              */
4363 /*                                                                  */
4364 /* Function     - Process the patch data created during the         */
4365 /*                instruction build process. This resolves jumps,   */
4366 /*                calls, variables etc.                             */
4367 /*                                                                  */
4368 /*------------------------------------------------------------------*/
4369
4370 void
4371 mono_arch_patch_code (MonoMethod *method, MonoDomain *domain,
4372                       guint8 *code, MonoJumpInfo *ji, gboolean run_cctors)
4373 {
4374         MonoJumpInfo *patch_info;
4375
4376         for (patch_info = ji; patch_info; patch_info = patch_info->next) {
4377                 unsigned char *ip = patch_info->ip.i + code;
4378                 gconstpointer target = NULL;
4379
4380                 target = mono_resolve_patch_target (method, domain, code,
4381                                                     patch_info, run_cctors);
4382
4383                 switch (patch_info->type) {
4384                         case MONO_PATCH_INFO_IP:
4385                         case MONO_PATCH_INFO_EXC_NAME:
4386                         case MONO_PATCH_INFO_LDSTR:
4387                         case MONO_PATCH_INFO_TYPE_FROM_HANDLE:
4388                         case MONO_PATCH_INFO_LDTOKEN:
4389                         case MONO_PATCH_INFO_EXC:
4390                         case MONO_PATCH_INFO_ABS:
4391                         case MONO_PATCH_INFO_METHOD:
4392                         case MONO_PATCH_INFO_INTERNAL_METHOD:
4393                         case MONO_PATCH_INFO_CLASS_INIT:
4394                                 s390_patch_addr (ip, (guint64) target);
4395                                 continue;
4396                         case MONO_PATCH_INFO_SWITCH:
4397                                 /*----------------------------------*/
4398                                 /* ip points at the basr r13,0/j +4 */
4399                                 /* instruction the vtable value     */
4400                                 /* follows this (i.e. ip+6)         */
4401                                 /*----------------------------------*/
4402                                 *((gconstpointer *)(ip+6)) = target;
4403                                 continue;
4404                         case MONO_PATCH_INFO_METHODCONST:
4405                         case MONO_PATCH_INFO_CLASS:
4406                         case MONO_PATCH_INFO_IMAGE:
4407                         case MONO_PATCH_INFO_FIELD:
4408                         case MONO_PATCH_INFO_IID:
4409                                 target = S390_RELATIVE(target, ip);
4410                                 s390_patch_rel (ip, (guint64) target);
4411                                 continue;
4412                         case MONO_PATCH_INFO_R4:
4413                         case MONO_PATCH_INFO_R8:
4414                         case MONO_PATCH_INFO_METHOD_REL:
4415                                 g_assert_not_reached ();
4416                                 continue;
4417                         default:
4418                                 target = S390_RELATIVE(target, ip);
4419                                 ip += 2;
4420                                 s390_patch_rel (ip, (guint64) target);
4421                 }
4422         }
4423 }
4424
4425 /*========================= End of Function ========================*/
4426
4427 /*------------------------------------------------------------------*/
4428 /*                                                                  */
4429 /* Name         - emit_load_volatile_registers                      */
4430 /*                                                                  */
4431 /* Function     - Emit the instructions to reload parameter regist- */
4432 /*                registers for use with "tail" operations.         */
4433 /*                                                                  */
4434 /*                The register loading operations performed here    */
4435 /*                are the mirror of the store operations performed  */
4436 /*                in mono_arch_emit_prolog and need to be kept in   */
4437 /*                synchronization with it.                          */
4438 /*                                                                  */
4439 /*------------------------------------------------------------------*/
4440
4441 guint8 *
4442 emit_load_volatile_registers (guint8 *code, MonoCompile *cfg)
4443 {
4444         MonoInst *inst;
4445         MonoMethod *method = cfg->method;
4446         MonoMethodSignature *sig = mono_method_signature(method);
4447         int pos = 0, i;
4448         CallInfo *cinfo;
4449         size_data sz;
4450
4451         cinfo = calculate_sizes (sig, &sz, sig->pinvoke);
4452
4453         if (cinfo->struct_ret) {
4454                 ArgInfo *ainfo = &cinfo->ret;
4455                 inst         = cfg->ret;
4456                 s390_lg (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4457         }
4458
4459         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
4460                 ArgInfo *ainfo = cinfo->args + i;
4461                 inst = cfg->varinfo [pos];
4462
4463                 if (inst->opcode == OP_REGVAR) {
4464                         if (ainfo->regtype == RegTypeGeneral)
4465                                 s390_lgr (code, ainfo->reg, inst->dreg);
4466                         else if (ainfo->regtype == RegTypeFP) {
4467                                 if (inst->dreg != ainfo->reg) {
4468                                         if (ainfo->size == 4) {
4469                                                 s390_ldebr (code, ainfo->reg, inst->dreg);
4470                                         } else {
4471                                                 s390_ldr   (code, ainfo->reg, inst->dreg);
4472                                         }
4473                                 }
4474                         }
4475                         else if (ainfo->regtype == RegTypeBase) {
4476                         } else
4477                                 g_assert_not_reached ();
4478                 } else {
4479                         if (ainfo->regtype == RegTypeGeneral) {
4480                                 if (!((ainfo->reg >= 2) && (ainfo->reg <= 6)))
4481                                         g_assert_not_reached();
4482                                 switch (ainfo->size) {
4483                                 case 1:
4484                                         s390_icy  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4485                                         break;
4486                                 case 2:
4487                                         s390_lgh  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4488                                         break;
4489                                 case 4:
4490                                         s390_lgf (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4491                                         break;
4492                                 case 8:
4493                                         s390_lg  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4494                                         break;
4495                                 }
4496                         } else if (ainfo->regtype == RegTypeBase) {
4497                         } else if (ainfo->regtype == RegTypeFP) {
4498                                 if (ainfo->size == 8)
4499                                         s390_ld  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4500                                 else if (ainfo->size == 4)
4501                                         s390_le  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4502                                 else
4503                                         g_assert_not_reached ();
4504                         } else if (ainfo->regtype == RegTypeStructByVal) {
4505                                 if (ainfo->reg != STK_BASE) {
4506                                         switch (ainfo->size) {
4507                                         case 1:
4508                                                 s390_icy (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4509                                                 break;
4510                                         case 2:
4511                                                 s390_lgh (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4512                                                 break;
4513                                         case 4:
4514                                                 s390_lgf (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4515                                                 break;
4516                                         case 8:
4517                                                 s390_lg  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4518                                                 break;
4519                                         }
4520                                 }
4521                         } else if (ainfo->regtype == RegTypeStructByAddr) {
4522                                 if (ainfo->reg != STK_BASE) {
4523                                         s390_lg (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4524                                 }
4525                         } else
4526                                 g_assert_not_reached ();
4527                 }
4528                 pos++;
4529         }
4530
4531         g_free (cinfo);
4532
4533         return code;
4534 }
4535
4536 /*========================= End of Function ========================*/
4537
4538 /*------------------------------------------------------------------*/
4539 /*                                                                  */
4540 /* Name         - mono_arch_emit_prolog                             */
4541 /*                                                                  */
4542 /* Function     - Create the instruction sequence for a function    */
4543 /*                prolog.                                           */
4544 /*                                                                  */
4545 /*------------------------------------------------------------------*/
4546
4547 guint8 *
4548 mono_arch_emit_prolog (MonoCompile *cfg)
4549 {
4550         MonoMethod *method = cfg->method;
4551         MonoBasicBlock *bb;
4552         MonoMethodSignature *sig;
4553         MonoInst *inst;
4554         int alloc_size, pos, max_offset, i;
4555         guint8 *code;
4556         CallInfo *cinfo;
4557         size_data sz;
4558         int tracing = 0;
4559         int lmfOffset;
4560
4561         cfg->code_size   = 512;
4562
4563         if (mono_jit_trace_calls != NULL && mono_trace_eval (method)) {
4564                 tracing         = 1;
4565                 cfg->code_size += 256;
4566         }
4567
4568         if (method->save_lmf)
4569                 cfg->code_size += 200;
4570
4571         cfg->native_code = code = g_malloc (cfg->code_size);
4572
4573         s390_stmg (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
4574
4575         if (cfg->flags & MONO_CFG_HAS_ALLOCA) {
4576                 cfg->used_int_regs |= 1 << 11;
4577         }
4578
4579         alloc_size = cfg->stack_offset;
4580
4581         cfg->stack_usage = alloc_size;
4582         s390_lgr  (code, s390_r11, STK_BASE);
4583         if (s390_is_uimm16 (alloc_size)) {
4584                 s390_aghi (code, STK_BASE, -alloc_size);
4585         } else {
4586                 int stackSize = alloc_size;
4587                 while (stackSize > 32767) {
4588                         s390_aghi (code, STK_BASE, -32767);
4589                         stackSize -= 32767;
4590                 }
4591                 s390_aghi (code, STK_BASE, -stackSize);
4592         }
4593         s390_stg  (code, s390_r11, 0, STK_BASE, 0);
4594
4595         if (cfg->frame_reg != STK_BASE)
4596                 s390_lgr (code, s390_r11, STK_BASE);
4597
4598         /* compute max_offset in order to use short forward jumps
4599          * we always do it on s390 because the immediate displacement
4600          * for jumps is too small
4601          */
4602         max_offset = 0;
4603         for (bb = cfg->bb_entry; bb; bb = bb->next_bb) {
4604                 MonoInst *ins = bb->code;
4605                 bb->max_offset = max_offset;
4606
4607                 if (cfg->prof_options & MONO_PROFILE_COVERAGE)
4608                         max_offset += 6;
4609
4610                 while (ins) {
4611                         max_offset += ((guint8 *)ins_spec [ins->opcode])[MONO_INST_LEN];
4612                         ins = ins->next;
4613                 }
4614         }
4615
4616         /* load arguments allocated to register from the stack */
4617         sig = mono_method_signature (method);
4618         pos = 0;
4619
4620         cinfo = calculate_sizes (sig, &sz, sig->pinvoke);
4621
4622         if (cinfo->struct_ret) {
4623                 ArgInfo *ainfo = &cinfo->ret;
4624                 inst         = cfg->ret;
4625                 inst->unused = ainfo->vtsize;
4626                 s390_stg (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4627         }
4628
4629         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
4630                 ArgInfo *ainfo = cinfo->args + i;
4631                 inst = cfg->varinfo [pos];
4632
4633                 if (inst->opcode == OP_REGVAR) {
4634                         if (ainfo->regtype == RegTypeGeneral)
4635                                 s390_lgr (code, inst->dreg, ainfo->reg);
4636                         else if (ainfo->regtype == RegTypeFP) {
4637                                 if (inst->dreg != ainfo->reg) {
4638                                         if (ainfo->size == 4) {
4639                                                 s390_ledbr (code, inst->dreg, ainfo->reg);
4640                                         } else {
4641                                                 s390_ldr   (code, inst->dreg, ainfo->reg);
4642                                         }
4643                                 }
4644                         }
4645                         else if (ainfo->regtype == RegTypeBase) {
4646                                 s390_lgr  (code, s390_r13, STK_BASE);
4647                                 s390_aghi (code, s390_r13, alloc_size);
4648                                 s390_lg   (code, inst->dreg, 0, s390_r13, ainfo->offset);
4649                         } else
4650                                 g_assert_not_reached ();
4651
4652                         if (cfg->verbose_level > 2)
4653                                 g_print ("Argument %d assigned to register %s\n",
4654                                          pos, mono_arch_regname (inst->dreg));
4655                 } else {
4656                         if (ainfo->regtype == RegTypeGeneral) {
4657                                 if (!((ainfo->reg >= 2) && (ainfo->reg <= 6)))
4658                                         g_assert_not_reached();
4659                                 switch (ainfo->size) {
4660                                 case 1:
4661                                         s390_stcy (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4662                                         break;
4663                                 case 2:
4664                                         s390_sthy (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4665                                         break;
4666                                 case 4:
4667                                         s390_sty (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4668                                         break;
4669                                 case 8:
4670                                         s390_stg (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4671                                         break;
4672                                 }
4673                         } else if (ainfo->regtype == RegTypeBase) {
4674                         } else if (ainfo->regtype == RegTypeFP) {
4675                                 if (ainfo->size == 8)
4676                                         s390_std (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4677                                 else if (ainfo->size == 4)
4678                                         s390_ste (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4679                                 else
4680                                         g_assert_not_reached ();
4681                         } else if (ainfo->regtype == RegTypeStructByVal) {
4682                                 int doffset = inst->inst_offset;
4683                                 int reg;
4684                                 if (ainfo->reg != STK_BASE)
4685                                         reg = ainfo->reg;
4686                                 else {
4687                                         reg = s390_r0;
4688                                         s390_lgr  (code, s390_r13, STK_BASE);
4689                                         s390_aghi (code, s390_r13, alloc_size);
4690                                 }
4691                                 switch (ainfo->size) {
4692                                         case 1:
4693                                                 if (ainfo->reg == STK_BASE)
4694                                                         s390_icy (code, reg, 0, s390_r13, ainfo->offset+7);
4695                                                 s390_stcy (code, reg, 0, inst->inst_basereg, doffset);
4696                                                 break;
4697                                         case 2:
4698                                                 if (ainfo->reg == STK_BASE)
4699                                                         s390_lhy (code, reg, 0, s390_r13, ainfo->offset+6);
4700                                                 s390_sthy (code, reg, 0, inst->inst_basereg, doffset);
4701                                                 break;
4702                                         case 4:
4703                                                 if (ainfo->reg == STK_BASE)
4704                                                         s390_ly  (code, reg, 0, s390_r13, ainfo->offset+4);
4705                                                 s390_sty (code, reg, 0, inst->inst_basereg, doffset);
4706                                                 break;
4707                                         case 8:
4708                                                 if (ainfo->reg == STK_BASE)
4709                                                         s390_lg  (code, reg, 0, s390_r13, ainfo->offset);
4710                                                 s390_stg (code, reg, 0, inst->inst_basereg, doffset);
4711                                                 break;
4712                                 }
4713                         } else if (ainfo->regtype == RegTypeStructByAddr) {
4714                                 s390_stg (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4715                         } else
4716                                 g_assert_not_reached ();
4717                 }
4718                 pos++;
4719         }
4720
4721         if (method->save_lmf) {
4722                 /*---------------------------------------------------------------*/
4723                 /* we build the MonoLMF structure on the stack - see mini-s390.h */
4724                 /*---------------------------------------------------------------*/
4725                 lmfOffset = alloc_size - sizeof(MonoLMF);
4726
4727                 s390_lgr   (code, s390_r13, cfg->frame_reg);
4728                 s390_aghi  (code, s390_r13, lmfOffset);
4729
4730                 /*---------------------------------------------------------------*/
4731                 /* Preserve the parameter registers while we fix up the lmf      */
4732                 /*---------------------------------------------------------------*/
4733                 s390_stmg  (code, s390_r2, s390_r6, s390_r13,
4734                             G_STRUCT_OFFSET(MonoLMF, pregs[0]));
4735
4736                 /*---------------------------------------------------------------*/
4737                 /* On return from this call r2 have the address of the &lmf      */
4738                 /*---------------------------------------------------------------*/
4739                 s390_basr(code, s390_r10, 0);
4740                 s390_j   (code, 6);
4741                 mono_add_patch_info (cfg, code - cfg->native_code,
4742                                      MONO_PATCH_INFO_INTERNAL_METHOD,
4743                                      (gpointer)"mono_get_lmf_addr");
4744                 s390_llong(code, 0);
4745                 s390_lg   (code, s390_r1, 0, s390_r10, 4);
4746                 s390_basr (code, s390_r14, s390_r1);
4747
4748                 /*---------------------------------------------------------------*/
4749                 /* Set lmf.lmf_addr = jit_tls->lmf                               */
4750                 /*---------------------------------------------------------------*/
4751                 s390_stg   (code, s390_r2, 0, s390_r13,
4752                             G_STRUCT_OFFSET(MonoLMF, lmf_addr));
4753
4754                 /*---------------------------------------------------------------*/
4755                 /* Get current lmf                                               */
4756                 /*---------------------------------------------------------------*/
4757                 s390_lg    (code, s390_r0, 0, s390_r2, 0);
4758
4759                 /*---------------------------------------------------------------*/
4760                 /* Set our lmf as the current lmf                                */
4761                 /*---------------------------------------------------------------*/
4762                 s390_stg   (code, s390_r13, 0, s390_r2, 0);
4763
4764                 /*---------------------------------------------------------------*/
4765                 /* Have our lmf.previous_lmf point to the last lmf               */
4766                 /*---------------------------------------------------------------*/
4767                 s390_stg   (code, s390_r0, 0, s390_r13,
4768                             G_STRUCT_OFFSET(MonoLMF, previous_lmf));
4769
4770                 /*---------------------------------------------------------------*/
4771                 /* save method info                                              */
4772                 /*---------------------------------------------------------------*/
4773                 s390_basr  (code, s390_r1, 0);
4774                 s390_j     (code, 6);
4775                 s390_llong (code, method);
4776                 s390_lg    (code, s390_r1, 0, s390_r1, 4);
4777                 s390_stg   (code, s390_r1, 0, s390_r13,
4778                             G_STRUCT_OFFSET(MonoLMF, method));
4779
4780                 /*---------------------------------------------------------------*/
4781                 /* save the current IP                                           */
4782                 /*---------------------------------------------------------------*/
4783                 s390_stg   (code, STK_BASE, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, ebp));
4784                 s390_basr  (code, s390_r1, 0);
4785                 s390_stg   (code, s390_r1, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, eip));
4786
4787                 /*---------------------------------------------------------------*/
4788                 /* Save general and floating point registers                     */
4789                 /*---------------------------------------------------------------*/
4790                 s390_stmg  (code, s390_r2, s390_r12, s390_r13,
4791                             G_STRUCT_OFFSET(MonoLMF, gregs[2]));
4792                 for (i = 0; i < 16; i++) {
4793                         s390_std  (code, i, 0, s390_r13,
4794                                    G_STRUCT_OFFSET(MonoLMF, fregs[i]));
4795                 }
4796
4797                 /*---------------------------------------------------------------*/
4798                 /* Restore the parameter registers now that we've set up the lmf */
4799                 /*---------------------------------------------------------------*/
4800                 s390_lmg   (code, s390_r2, s390_r6, s390_r13,
4801                             G_STRUCT_OFFSET(MonoLMF, pregs[0]));
4802         }
4803
4804         if (tracing)
4805                 code = mono_arch_instrument_prolog(cfg, enter_method, code, TRUE);
4806
4807         cfg->code_len = code - cfg->native_code;
4808         g_assert (cfg->code_len < cfg->code_size);
4809
4810         g_free (cinfo);
4811
4812         return code;
4813 }
4814
4815 /*========================= End of Function ========================*/
4816
4817 /*------------------------------------------------------------------*/
4818 /*                                                                  */
4819 /* Name         - mono_arch_emit_epilog                             */
4820 /*                                                                  */
4821 /* Function     - Emit the instructions for a function epilog.      */
4822 /*                                                                  */
4823 /*------------------------------------------------------------------*/
4824
4825 void
4826 mono_arch_emit_epilog (MonoCompile *cfg)
4827 {
4828         MonoMethod *method = cfg->method;
4829         int tracing = 0;
4830         guint8 *code;
4831         int max_epilog_size = 96;
4832
4833         if (cfg->method->save_lmf)
4834                 max_epilog_size += 128;
4835
4836         if (mono_jit_trace_calls != NULL)
4837                 max_epilog_size += 128;
4838
4839         if (cfg->prof_options & MONO_PROFILE_ENTER_LEAVE)
4840                 max_epilog_size += 128;
4841
4842         while ((cfg->code_len + max_epilog_size) > (cfg->code_size - 16)) {
4843                 cfg->code_size  *= 2;
4844                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
4845                 mono_jit_stats.code_reallocs++;
4846         }
4847
4848         code = cfg->native_code + cfg->code_len;
4849
4850         if (mono_jit_trace_calls != NULL && mono_trace_eval (method)) {
4851                 code = mono_arch_instrument_epilog (cfg, leave_method, code, TRUE);
4852                 tracing = 1;
4853         }
4854
4855         if (method->save_lmf)
4856                 restoreLMF(code, cfg->frame_reg, cfg->stack_usage);
4857
4858         if (cfg->flags & MONO_CFG_HAS_ALLOCA)
4859                 s390_lg  (code, STK_BASE, 0, STK_BASE, 0);
4860         else
4861                 code = backUpStackPtr(cfg, code);
4862
4863         s390_lmg (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
4864         s390_br  (code, s390_r14);
4865
4866         cfg->code_len = code - cfg->native_code;
4867
4868         g_assert (cfg->code_len < cfg->code_size);
4869
4870 }
4871
4872 /*========================= End of Function ========================*/
4873
4874 /*------------------------------------------------------------------*/
4875 /*                                                                  */
4876 /* Name         - mono_arch_emit_exceptions                         */
4877 /*                                                                  */
4878 /* Function     - Emit the blocks to handle exception conditions.   */
4879 /*                                                                  */
4880 /*------------------------------------------------------------------*/
4881
4882 void
4883 mono_arch_emit_exceptions (MonoCompile *cfg)
4884 {
4885         MonoJumpInfo    *patch_info;
4886         guint8          *code;
4887         int             nThrows = 0,
4888                         exc_count = 0,
4889                         iExc;
4890         guint32         code_size;
4891         MonoClass       *exc_classes [MAX_EXC];
4892         guint8          *exc_throw_start [MAX_EXC],
4893                         *exc_throw_end [MAX_EXC];
4894
4895         for (patch_info = cfg->patch_info;
4896              patch_info;
4897              patch_info = patch_info->next) {
4898                 if (patch_info->type == MONO_PATCH_INFO_EXC)
4899                         exc_count++;
4900         }
4901
4902         code_size = exc_count * 48;
4903
4904         while ((cfg->code_len + code_size) > (cfg->code_size - 16)) {
4905                 cfg->code_size  *= 2;
4906                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
4907                 mono_jit_stats.code_reallocs++;
4908         }
4909
4910         code = cfg->native_code + cfg->code_len;
4911
4912         /*---------------------------------------------------------------------*/
4913         /* Add code to raise exceptions                                        */
4914         /*---------------------------------------------------------------------*/
4915         for (patch_info = cfg->patch_info; patch_info; patch_info = patch_info->next) {
4916                 switch (patch_info->type) {
4917                 case MONO_PATCH_INFO_EXC: {
4918                         guint8 *ip = patch_info->ip.i + cfg->native_code;
4919                         MonoClass *exc_class;
4920                         guint64 throw_ip;
4921
4922                         /*-----------------------------------------------------*/
4923                         /* Patch the branch in epilog to come here             */
4924                         /*-----------------------------------------------------*/
4925                         s390_patch_rel (ip + 2, (guint64) S390_RELATIVE(code,ip));
4926
4927                         exc_class = mono_class_from_name (mono_defaults.corlib,
4928                                                           "System",
4929                                                           patch_info->data.name);
4930                         g_assert (exc_class);
4931                         throw_ip = patch_info->ip.i;
4932
4933                         for (iExc = 0; iExc < nThrows; ++iExc)
4934                                 if (exc_classes [iExc] == exc_class)
4935                                         break;
4936
4937                         if (iExc < nThrows) {
4938                                 s390_jcl (code, S390_CC_UN,
4939                                           (guint64) exc_throw_start [iExc]);
4940                                 patch_info->type = MONO_PATCH_INFO_NONE;
4941                         } else {
4942
4943                                 if (nThrows < MAX_EXC) {
4944                                         exc_classes [nThrows]     = exc_class;
4945                                         exc_throw_start [nThrows] = code;
4946                                 }
4947
4948                                 /*---------------------------------------------*/
4949                                 /* Patch the parameter passed to the handler   */
4950                                 /*---------------------------------------------*/
4951                                 s390_basr (code, s390_r13, 0);
4952                                 s390_j    (code, 6);
4953                                 s390_llong(code, patch_info->data.target);
4954                                 /*---------------------------------------------*/
4955                                 /* Load return address & parameter register    */
4956                                 /*---------------------------------------------*/
4957                                 s390_larl (code, s390_r14, S390_RELATIVE((patch_info->ip.i +
4958                                                            cfg->native_code + 8), code));
4959                                 s390_lg   (code, s390_r2, 0, s390_r13, 4);
4960                                 /*---------------------------------------------*/
4961                                 /* Reuse the current patch to set the jump     */
4962                                 /*---------------------------------------------*/
4963                                 s390_basr (code, s390_r13, 0);
4964                                 s390_j    (code, 6);
4965                                 patch_info->type      = MONO_PATCH_INFO_INTERNAL_METHOD;
4966                                 patch_info->data.name = "mono_arch_throw_exception_by_name";
4967                                 patch_info->ip.i      = code - cfg->native_code;
4968                                 s390_llong(code, 0);
4969                                 s390_lg   (code, s390_r1, 0, s390_r13, 4);
4970                                 s390_br   (code, s390_r1);
4971                         }
4972                         break;
4973                 }
4974                 default:
4975                         /* do nothing */
4976                         break;
4977                 }
4978         }
4979
4980         cfg->code_len = code - cfg->native_code;
4981
4982         g_assert (cfg->code_len < cfg->code_size);
4983
4984 }
4985
4986 /*========================= End of Function ========================*/
4987
4988 /*------------------------------------------------------------------*/
4989 /*                                                                  */
4990 /* Name         - mono_arch_setup_jit_tls_data                      */
4991 /*                                                                  */
4992 /* Function     - Setup the JIT's Thread Level Specific Data.       */
4993 /*                                                                  */
4994 /*------------------------------------------------------------------*/
4995
4996 void
4997 mono_arch_setup_jit_tls_data (MonoJitTlsData *tls)
4998 {
4999         if (!tls_offset_inited) {
5000                 tls_offset_inited = TRUE;
5001
5002 #if HAVE_KW_THREAD
5003 # if 0
5004         __asm__ ("\tear\t%r1,0\n"
5005                  "\tlr\t%0,%3\n"
5006                  "\tsr\t%0,%r1\n"
5007                  "\tlr\t%1,%4\n"
5008                  "\tsr\t%1,%r1\n"
5009                  "\tlr\t%2,%5\n"
5010                  "\tsr\t%2,%r1\n"
5011                  : "=r" (appdomain_tls_offset),
5012                    "=r" (thread_tls_offset),
5013                    "=r" (lmf_tls_offset)
5014                  : "r" (&tls_appdomain),
5015                    "r" (&tls_current_object),
5016                    "r" (&mono_lmf_addr)
5017                  : "1", "cc");
5018 # endif
5019 #endif
5020         }
5021
5022         if (!lmf_addr_key_inited) {
5023                 lmf_addr_key_inited = TRUE;
5024                 pthread_key_create (&lmf_addr_key, NULL);
5025         }
5026         pthread_setspecific (lmf_addr_key, &tls->lmf);
5027
5028 }
5029
5030 /*========================= End of Function ========================*/
5031
5032 /*------------------------------------------------------------------*/
5033 /*                                                                  */
5034 /* Name         - mono_arch_free_jit_tls_data                       */
5035 /*                                                                  */
5036 /* Function     - Free tls data.                                    */
5037 /*                                                                  */
5038 /*------------------------------------------------------------------*/
5039
5040 void
5041 mono_arch_free_jit_tls_data (MonoJitTlsData *tls)
5042 {
5043
5044 }
5045
5046 /*========================= End of Function ========================*/
5047
5048 /*------------------------------------------------------------------*/
5049 /*                                                                  */
5050 /* Name         - mono_arch_emit_this_vret_args                     */
5051 /*                                                                  */
5052 /* Function     -                                                   */
5053 /*                                                                  */
5054 /*------------------------------------------------------------------*/
5055
5056 void
5057 mono_arch_emit_this_vret_args (MonoCompile *cfg, MonoCallInst *inst, int this_reg, int this_type, int vt_reg)
5058 {
5059         int this_dreg = s390_r2;
5060
5061         if (vt_reg != -1)
5062                 this_dreg = s390_r3;
5063
5064         /* add the this argument */
5065         if (this_reg != -1) {
5066                 MonoInst *this;
5067                 MONO_INST_NEW (cfg, this, OP_SETREG);
5068                 this->type  = this_type;
5069                 this->sreg1 = this_reg;
5070                 this->dreg  = mono_regstate_next_int (cfg->rs);
5071                 mono_bblock_add_inst (cfg->cbb, this);
5072                 mono_call_inst_add_outarg_reg (inst, this->dreg, this_dreg, FALSE);
5073         }
5074
5075         if (vt_reg != -1) {
5076                 MonoInst *vtarg;
5077                 MONO_INST_NEW (cfg, vtarg, OP_SETREG);
5078                 vtarg->type  = STACK_MP;
5079                 vtarg->sreg1 = vt_reg;
5080                 vtarg->dreg  = mono_regstate_next_int (cfg->rs);
5081                 mono_bblock_add_inst (cfg->cbb, vtarg);
5082                 mono_call_inst_add_outarg_reg (inst, vtarg->dreg, s390_r2, FALSE);
5083         }
5084 }
5085
5086 /*========================= End of Function ========================*/
5087
5088 /*------------------------------------------------------------------*/
5089 /*                                                                  */
5090 /* Name         - mono_arch_get_inst_for_method                   */
5091 /*                                                                  */
5092 /* Function     - Check for opcodes we can handle directly in       */
5093 /*                hardware.                                         */
5094 /*                                                                  */
5095 /*------------------------------------------------------------------*/
5096
5097 MonoInst*
5098 mono_arch_get_inst_for_method (MonoCompile *cfg, MonoMethod *cmethod,
5099                                MonoMethodSignature *fsig, MonoInst **args)
5100 {
5101         MonoInst *ins = NULL;
5102
5103         if (cmethod->klass == mono_defaults.math_class) {
5104                 if (strcmp (cmethod->name, "Sqrt") == 0) {
5105                         MONO_INST_NEW (cfg, ins, OP_SQRT);
5106                         ins->inst_i0 = args [0];
5107                 }
5108 //              if (strcmp (cmethod->name, "Abs") == 0) {
5109 //                      MONO_INST_NEW (cfg, ins, OP_ABS);
5110 //                      ins->inst_i0 = args [0];
5111 //              }
5112         } else if (cmethod->klass == mono_defaults.thread_class &&
5113                            strcmp (cmethod->name, "MemoryBarrier") == 0) {
5114                 MONO_INST_NEW (cfg, ins, OP_MEMORY_BARRIER);
5115         } else if(cmethod->klass->image == mono_defaults.corlib &&
5116                            (strcmp (cmethod->klass->name_space, "System.Threading") == 0) &&
5117                            (strcmp (cmethod->klass->name, "Interlocked") == 0)) {
5118
5119                 if (strcmp (cmethod->name, "Increment") == 0) {
5120                         MonoInst *ins_iconst;
5121                         guint32 opcode = 0;
5122
5123                         if (fsig->params [0]->type == MONO_TYPE_I4)
5124                                 opcode = OP_ATOMIC_ADD_NEW_I4;
5125                         else if (fsig->params [0]->type == MONO_TYPE_I8)
5126                                 opcode = OP_ATOMIC_ADD_NEW_I8;
5127                         else
5128                                 g_assert_not_reached ();
5129
5130                         MONO_INST_NEW (cfg, ins, opcode);
5131                         MONO_INST_NEW (cfg, ins_iconst, OP_ICONST);
5132                         ins_iconst->inst_c0 = 1;
5133
5134                         ins->inst_i0 = args [0];
5135                         ins->inst_i1 = ins_iconst;
5136                 } else if (strcmp (cmethod->name, "Decrement") == 0) {
5137                         MonoInst *ins_iconst;
5138                         guint32 opcode = 0;
5139
5140                         if (fsig->params [0]->type == MONO_TYPE_I4)
5141                                 opcode = OP_ATOMIC_ADD_NEW_I4;
5142                         else if (fsig->params [0]->type == MONO_TYPE_I8)
5143                                 opcode = OP_ATOMIC_ADD_NEW_I8;
5144                         else
5145                                 g_assert_not_reached ();
5146                         MONO_INST_NEW (cfg, ins, opcode);
5147                         MONO_INST_NEW (cfg, ins_iconst, OP_ICONST);
5148                         ins_iconst->inst_c0 = -1;
5149
5150                         ins->inst_i0 = args [0];
5151                         ins->inst_i1 = ins_iconst;
5152                         /* FIXME: */
5153                 } else if (strcmp (cmethod->name, "Exchange") == 0) {
5154                         guint32 opcode = 0;
5155
5156                         if (fsig->params [0]->type == MONO_TYPE_I4)
5157                                 opcode = OP_ATOMIC_EXCHANGE_I4;
5158                         else if ((fsig->params [0]->type == MONO_TYPE_I8) ||
5159                                          (fsig->params [0]->type == MONO_TYPE_I) ||
5160                                          (fsig->params [0]->type == MONO_TYPE_OBJECT))
5161                                 opcode = OP_ATOMIC_EXCHANGE_I8;
5162                         else
5163                                 return NULL;
5164
5165                         MONO_INST_NEW (cfg, ins, opcode);
5166
5167                         ins->inst_i0 = args [0];
5168                         ins->inst_i1 = args [1];
5169                 } else if (strcmp (cmethod->name, "Add") == 0) {
5170                         guint32 opcode = 0;
5171
5172                         if (fsig->params [0]->type == MONO_TYPE_I4)
5173                                 opcode = OP_ATOMIC_ADD_I4;
5174                         else if (fsig->params [0]->type == MONO_TYPE_I8)
5175                                 opcode = OP_ATOMIC_ADD_I8;
5176                         else
5177                                 g_assert_not_reached ();
5178
5179                         MONO_INST_NEW (cfg, ins, opcode);
5180
5181                         ins->inst_i0 = args [0];
5182                         ins->inst_i1 = args [1];
5183                 } else if ((strcmp (cmethod->name, "Read") == 0 &&
5184                            (fsig->params [0]->type == MONO_TYPE_I8))) {
5185                         MONO_INST_NEW (cfg, ins, CEE_LDIND_I8);
5186                         ins->inst_i0 = args [0];
5187                 }
5188         }
5189         return ins;
5190 }
5191
5192 /*========================= End of Function ========================*/
5193
5194 /*------------------------------------------------------------------*/
5195 /*                                                                  */
5196 /* Name         - mono_arch_print_tree                              */
5197 /*                                                                  */
5198 /* Function     - Print platform-specific opcode details.           */
5199 /*                                                                  */
5200 /* Returns      - 1 - opcode details have been printed              */
5201 /*                0 - opcode details have not been printed          */
5202 /*                                                                  */
5203 /*------------------------------------------------------------------*/
5204
5205 gboolean
5206 mono_arch_print_tree (MonoInst *tree, int arity)
5207 {
5208         gboolean done;
5209
5210         switch (tree->opcode) {
5211                 case OP_S390_LOADARG:
5212                 case OP_S390_ARGREG:
5213                 case OP_S390_ARGPTR:
5214                         printf ("[0x%lx(%s)]", tree->inst_offset,
5215                                 mono_arch_regname (tree->inst_basereg));
5216                         done = 1;
5217                         break;
5218                 case OP_S390_STKARG:
5219                         printf ("[0x%lx(previous_frame)]",
5220                                 tree->inst_offset);
5221                         done = 1;
5222                         break;
5223                 case OP_S390_MOVE:
5224                         printf ("[0x%lx(%d,%s),0x%lx(%s)]",
5225                                 tree->inst_offset, tree->unused,
5226                                 mono_arch_regname(tree->dreg),
5227                                 tree->inst_imm,
5228                                 mono_arch_regname(tree->sreg1));
5229                         done = 1;
5230                         break;
5231                 case OP_S390_SETF4RET:
5232                         printf ("[f%s,f%s]",
5233                                 mono_arch_regname (tree->dreg),
5234                                 mono_arch_regname (tree->sreg1));
5235                         done = 1;
5236                         break;
5237                 case OP_TLS_GET:
5238                         printf ("[0x%lx(0x%lx,%s)]", tree->inst_offset,
5239                                 tree->inst_imm,
5240                                 mono_arch_regname (tree->sreg1));
5241                         done = 1;
5242                         break;
5243                 case OP_S390_BKCHAIN:
5244                         printf ("[previous_frame(%s)]",
5245                                 mono_arch_regname (tree->sreg1));
5246                         done = 1;
5247                 default:
5248                         done = 0;
5249         }
5250         return (done);
5251 }
5252
5253 /*========================= End of Function ========================*/
5254
5255 /*------------------------------------------------------------------*/
5256 /*                                                                  */
5257 /* Name         - mono_arch_regalloc_cost                           */
5258 /*                                                                  */
5259 /* Function     - Determine the cost, in the number of memory       */
5260 /*                references, of the action of allocating the var-  */
5261 /*                iable VMV into a register during global register  */
5262 /*                allocation.                                       */
5263 /*                                                                  */
5264 /* Returns      - Cost                                              */
5265 /*                                                                  */
5266 /*------------------------------------------------------------------*/
5267
5268 guint32
5269 mono_arch_regalloc_cost (MonoCompile *cfg, MonoMethodVar *vmv)
5270 {
5271         /* FIXME: */
5272         return 2;
5273 }
5274
5275 /*========================= End of Function ========================*/
5276
5277 /*------------------------------------------------------------------*/
5278 /*                                                                  */
5279 /* Name         - mono_arch_get_domain_intrinsic                    */
5280 /*                                                                  */
5281 /* Function     -                                                   */
5282 /*                                                                  */
5283 /* Returns      -                                                   */
5284 /*                                                                  */
5285 /*------------------------------------------------------------------*/
5286
5287 MonoInst *
5288 mono_arch_get_domain_intrinsic (MonoCompile* cfg)
5289 {
5290         MonoInst *ins;
5291
5292         if (appdomain_tls_offset == -1)
5293                 return NULL;
5294
5295         MONO_INST_NEW (cfg, ins, OP_TLS_GET);
5296         ins->inst_offset = appdomain_tls_offset;
5297         return (ins);
5298 }
5299
5300 /*========================= End of Function ========================*/
5301
5302 /*------------------------------------------------------------------*/
5303 /*                                                                  */
5304 /* Name         - mono_arch_get_thread_intrinsic                    */
5305 /*                                                                  */
5306 /* Function     -                                                   */
5307 /*                                                                  */
5308 /* Returns      -                                                   */
5309 /*                                                                  */
5310 /*------------------------------------------------------------------*/
5311
5312 MonoInst *
5313 mono_arch_get_thread_intrinsic (MonoCompile* cfg)
5314 {
5315         MonoInst *ins;
5316
5317         if (thread_tls_offset == -1)
5318                 return NULL;
5319
5320         MONO_INST_NEW (cfg, ins, OP_TLS_GET);
5321         ins->inst_offset = thread_tls_offset;
5322         return (ins);
5323 }
5324
5325 /*========================= End of Function ========================*/
5326
5327 /*------------------------------------------------------------------*/
5328 /*                                                                  */
5329 /* Name         - mono_arch_flush_register_windows                  */
5330 /*                                                                  */
5331 /* Function     -                                                   */
5332 /*                                                                  */
5333 /* Returns      -                                                   */
5334 /*                                                                  */
5335 /*------------------------------------------------------------------*/
5336
5337 void
5338 mono_arch_flush_register_windows (void)
5339 {
5340 }
5341
5342 /*========================= End of Function ========================*/
5343
5344 /*------------------------------------------------------------------*/
5345 /*                                                                  */
5346 /* Name         - mono_arch_get_lmf_addr                            */
5347 /*                                                                  */
5348 /* Function     -                                                   */
5349 /*                                                                  */
5350 /* Returns      -                                                   */
5351 /*                                                                  */
5352 /*------------------------------------------------------------------*/
5353
5354 gpointer
5355 mono_arch_get_lmf_addr (void)
5356 {
5357         return pthread_getspecific (lmf_addr_key);
5358 }
5359
5360 /*========================= End of Function ========================*/
5361
5362 /*------------------------------------------------------------------*/
5363 /*                                                                  */
5364 /* Name         - mono_arch_is_inst_imm                             */
5365 /*                                                                  */
5366 /* Function     - Determine if operand qualifies as an immediate    */
5367 /*                value. For s390 this is a value -32768-32768      */
5368 /*                                                                  */
5369 /* Returns      - True|False - is [not] immediate value.            */
5370 /*                                                                  */
5371 /*------------------------------------------------------------------*/
5372
5373 gboolean
5374 mono_arch_is_inst_imm (gint64 imm)
5375 {
5376         return s390_is_imm16 (imm);
5377 }
5378
5379 /*========================= End of Function ========================*/
5380
5381 /*------------------------------------------------------------------*/
5382 /*                                                                  */
5383 /* Name         - opcode_to_cond                                    */
5384 /*                                                                  */
5385 /* Function     - Simplify the branch on condition opcode from      */
5386 /*                more than 20 to just a handful for easy manipu-   */
5387 /*                lation within the instruction emitting code.      */
5388 /*                                                                  */
5389 /* Returns      - CMP_xxx - this simplified condition type.         */
5390 /*                                                                  */
5391 /*------------------------------------------------------------------*/
5392
5393 static CompRelation
5394 opcode_to_cond (int opcode)
5395 {
5396         switch (opcode) {
5397         case CEE_BEQ:
5398         case OP_CEQ:
5399         case OP_IBEQ:
5400         case OP_ICEQ:
5401         case OP_FBEQ:
5402         case OP_FCEQ:
5403         case OP_COND_EXC_EQ:
5404                 return CMP_EQ;
5405         case CEE_BNE_UN:
5406         case OP_COND_EXC_NE_UN:
5407         case OP_IBNE_UN:
5408         case OP_FBNE_UN:
5409                 return CMP_NE;
5410         case CEE_BLE:
5411         case OP_IBLE:
5412         case OP_FBLE:
5413                 return CMP_LE;
5414         case CEE_BGE:
5415         case OP_IBGE:
5416         case OP_FBGE:
5417                 return CMP_GE;
5418         case CEE_BLT:
5419         case OP_COND_EXC_LT:
5420         case OP_CLT:
5421         case OP_IBLT:
5422         case OP_ICLT:
5423         case OP_FBLT:
5424         case OP_FCLT:
5425                 return CMP_LT;
5426         case CEE_BGT:
5427         case OP_COND_EXC_GT:
5428         case OP_CGT:
5429         case OP_IBGT:
5430         case OP_ICGT:
5431         case OP_FBGT:
5432         case OP_FCGT:
5433                 return CMP_GT;
5434
5435         case CEE_BLE_UN:
5436         case OP_COND_EXC_LE_UN:
5437         case OP_IBLE_UN:
5438         case OP_FBLE_UN:
5439                 return CMP_LE_UN;
5440         case CEE_BGE_UN:
5441         case OP_IBGE_UN:
5442         case OP_FBGE_UN:
5443                 return CMP_GE_UN;
5444         case CEE_BLT_UN:
5445         case OP_CLT_UN:
5446         case OP_IBLT_UN:
5447         case OP_ICLT_UN:
5448         case OP_FBLT_UN:
5449         case OP_FCLT_UN:
5450         case OP_COND_EXC_LT_UN:
5451                 return CMP_LT_UN;
5452         case CEE_BGT_UN:
5453         case OP_COND_EXC_GT_UN:
5454         case OP_CGT_UN:
5455         case OP_IBGT_UN:
5456         case OP_ICGT_UN:
5457         case OP_FCGT_UN:
5458         case OP_FBGT_UN:
5459                 return CMP_GT_UN;
5460         default:
5461                 printf ("%s\n", mono_inst_name (opcode));
5462                 g_error("Not implemented\n");
5463         }
5464         return CMP_EQ;
5465 }
5466
5467 /*========================= End of Function ========================*/