mono/mini/mini-s390.c

   1 /*------------------------------------------------------------------*/
   2 /*                                                                  */
   3 /* Name        - mini-s390.c                                        */
   4 /*                                                                  */
   5 /* Function    - S/390 backend for the Mono code generator.         */
   6 /*                                                                  */
   7 /* Name        - Neale Ferguson (Neale.Ferguson@SoftwareAG-usa.com) */
   8 /*                                                                  */
   9 /* Date        - January, 2004                                      */
  10 /*                                                                  */
  11 /* Derivation  - From mini-x86 & mini-ppc by -                      */
  12 /*               Paolo Molaro (lupus@ximian.com)                    */
  13 /*               Dietmar Maurer (dietmar@ximian.com)                */
  14 /*                                                                  */
  15 /*------------------------------------------------------------------*/
  16
  17 /*------------------------------------------------------------------*/
  18 /*                 D e f i n e s                                    */
  19 /*------------------------------------------------------------------*/
  20
  21 #define 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_lr  (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_lr  (code, s390_r13, ins->sreg2);                  \
 113         } else {                                                        \
 114                 src2 = ins->sreg2;                                      \
 115         }                                                               \
 116         if (ins->dreg != ins->sreg1) {                                  \
 117                 s390_lr  (code, ins->dreg, ins->sreg1);                 \
 118         }
 119
 120 #define CHECK_SRCDST_COM_F                                              \
 121         if (ins->dreg == ins->sreg2) {                                  \
 122                 src2 = ins->sreg1;                                      \
 123         } else {                                                        \
 124                 src2 = ins->sreg2;                                      \
 125                 if (ins->dreg != ins->sreg1) {                          \
 126                         s390_ldr (code, ins->dreg, ins->sreg1);         \
 127                 }                                                       \
 128         }
 129
 130 #define CHECK_SRCDST_NCOM_F                                             \
 131         if (ins->dreg == ins->sreg2) {                                  \
 132                 src2 = s390_f15;                                        \
 133                 s390_ldr (code, s390_r13, ins->sreg2);                  \
 134         } else {                                                        \
 135                 src2 = ins->sreg2;                                      \
 136         }                                                               \
 137         if (ins->dreg != ins->sreg1) {                                  \
 138                 s390_ldr (code, ins->dreg, ins->sreg1);                 \
 139         }
 140
 141 #undef DEBUG
 142 #define DEBUG(a) if (cfg->verbose_level > 1) a
 143
 144 #define MAX_EXC 16
 145
 146 #define S390_TRACE_STACK_SIZE (5*sizeof(gint32)+3*sizeof(gdouble))
 147
 148 #define MAX (a, b) ((a) > (b) ? (a) : (b))
 149
 150 /*========================= End of Defines =========================*/
 151
 152 /*------------------------------------------------------------------*/
 153 /*                 I n c l u d e s                                  */
 154 /*------------------------------------------------------------------*/
 155
 156 #include "mini.h"
 157 #include <string.h>
 158
 159 #include <mono/metadata/appdomain.h>
 160 #include <mono/metadata/debug-helpers.h>
 161 #include <mono/metadata/profiler-private.h>
 162 #include <mono/utils/mono-math.h>
 163
 164 #include "mini-s390.h"
 165 #include "inssel.h"
 166 #include "cpu-s390.h"
 167
 168 /*========================= End of Includes ========================*/
 169
 170 /*------------------------------------------------------------------*/
 171 /*                 T y p e d e f s                                  */
 172 /*------------------------------------------------------------------*/
 173
 174 typedef struct {
 175         guint stack_size,
 176               local_size,
 177               code_size,
 178               parm_size,
 179               offset,
 180               offStruct,
 181               retStruct;
 182 } size_data;
 183
 184 /*------------------------------------------------------------------*/
 185 /* Used by the instrument_emit_epilog                               */
 186 /*------------------------------------------------------------------*/
 187
 188 enum {
 189         SAVE_NONE,
 190         SAVE_STRUCT,
 191         SAVE_ONE,
 192         SAVE_TWO,
 193         SAVE_R4,
 194         SAVE_R8
 195 };
 196
 197 typedef struct InstList InstList;
 198
 199 struct InstList {
 200         InstList *prev;
 201         InstList *next;
 202         MonoInst *data;
 203 };
 204
 205 enum {
 206         RegTypeGeneral,
 207         RegTypeBase,
 208         RegTypeFP,
 209         RegTypeStructByVal,
 210         RegTypeStructByAddr
 211 };
 212
 213 typedef struct {
 214         gint32  offset;         /* offset from caller's stack */
 215         gint32  offparm;        /* offset from callee's stack */
 216         guint16 vtsize;         /* in param area */
 217         guint8  reg;
 218         guint8  regtype;        /* See RegType* */
 219         guint32 size;           /* Size of structure used by RegTypeStructByVal */
 220 } ArgInfo;
 221
 222 typedef struct {
 223         int nargs;
 224         guint32 stack_usage;
 225         guint32 struct_ret;
 226         ArgInfo ret;
 227         ArgInfo sigCookie;
 228         ArgInfo args [1];
 229 } CallInfo;
 230
 231 typedef struct {
 232         gint32  gr[5];          /* R2-R6                            */
 233         gdouble fp[3];          /* F0-F2                            */
 234 } __attribute__ ((packed)) RegParm;
 235
 236 /*========================= End of Typedefs ========================*/
 237
 238 /*------------------------------------------------------------------*/
 239 /*                   P r o t o t y p e s                            */
 240 /*------------------------------------------------------------------*/
 241
 242 static guint8 * emit_memcpy (guint8 *, int, int, int, int, int);
 243 static void indent (int);
 244 static guint8 * backUpStackPtr(MonoCompile *, guint8 *, gint);
 245 static void decodeParm (MonoType *, void *, int);
 246 static void enter_method (MonoMethod *, RegParm *, char *);
 247 static void leave_method (MonoMethod *, ...);
 248 static gboolean is_regsize_var (MonoType *);
 249 static inline void add_general (guint *, size_data *, ArgInfo *, gboolean);
 250 static inline void add_stackParm (guint *, size_data *, ArgInfo *, gint);
 251 static inline void add_float (guint *, size_data *, ArgInfo *);
 252 static CallInfo * calculate_sizes (MonoMethodSignature *, size_data *, gboolean);
 253 static void peephole_pass (MonoCompile *, MonoBasicBlock *);
 254 static guchar * emit_float_to_int (MonoCompile *, guchar *, int, int, int, gboolean);
 255 static void mono_arch_break(void);
 256 gpointer mono_arch_get_lmf_addr (void);
 257 static guint8 * emit_load_volatile_registers(guint8 *, MonoCompile *);
 258
 259 /*========================= End of Prototypes ======================*/
 260
 261 /*------------------------------------------------------------------*/
 262 /*                 G l o b a l   V a r i a b l e s                  */
 263 /*------------------------------------------------------------------*/
 264
 265 int mono_exc_esp_offset = 0;
 266
 267 static int indent_level = 0;
 268
 269 static const char*const * ins_spec = s390_cpu_desc;
 270
 271 static gboolean tls_offset_inited = FALSE;
 272
 273 static int appdomain_tls_offset = -1,
 274            lmf_tls_offset = -1,
 275            thread_tls_offset = -1;
 276
 277 pthread_key_t lmf_addr_key;
 278
 279 gboolean lmf_addr_key_inited = FALSE;
 280
 281 #if 0
 282
 283 extern __thread MonoDomain *tls_appdomain;
 284 extern __thread MonoThread *tls_current_object;
 285 extern __thread gpointer   mono_lmf_addr;
 286
 287 #endif
 288
 289 /*====================== End of Global Variables ===================*/
 290
 291 /*------------------------------------------------------------------*/
 292 /*                                                                  */
 293 /* Name         - mono_arch_regname                                 */
 294 /*                                                                  */
 295 /* Function     - Returns the name of the register specified by     */
 296 /*                the input parameter.                              */
 297 /*                                                                  */
 298 /*------------------------------------------------------------------*/
 299
 300 const char*
 301 mono_arch_regname (int reg) {
 302         static const char * rnames[] = {
 303                 "s390_r0", "s390_sp", "s390_r2", "s390_r3", "s390_r4",
 304                 "s390_r5", "s390_r6", "s390_r7", "s390_r8", "s390_r9",
 305                 "s390_r10", "s390_r11", "s390_r12", "s390_r13", "s390_r14",
 306                 "s390_r15"
 307         };
 308
 309         if (reg >= 0 && reg < 16)
 310                 return rnames [reg];
 311         else
 312                 return "unknown";
 313 }
 314
 315 /*========================= End of Function ========================*/
 316
 317 /*------------------------------------------------------------------*/
 318 /*                                                                  */
 319 /* Name         - mono_arch_fregname                                */
 320 /*                                                                  */
 321 /* Function     - Returns the name of the register specified by     */
 322 /*                the input parameter.                              */
 323 /*                                                                  */
 324 /*------------------------------------------------------------------*/
 325
 326 const char*
 327 mono_arch_fregname (int reg) {
 328         static const char * rnames[] = {
 329                 "s390_f0", "s390_f1", "s390_f2", "s390_f3", "s390_f4",
 330                 "s390_f5", "s390_f6", "s390_f7", "s390_f8", "s390_f9",
 331                 "s390_f10", "s390_f11", "s390_f12", "s390_f13", "s390_f14",
 332                 "s390_f15"
 333         };
 334
 335         if (reg >= 0 && reg < 16)
 336                 return rnames [reg];
 337         else
 338                 return "unknown";
 339 }
 340
 341 /*========================= End of Function ========================*/
 342
 343 /*------------------------------------------------------------------*/
 344 /*                                                                  */
 345 /* Name         - emit_memcpy                                       */
 346 /*                                                                  */
 347 /* Function     - Emit code to move from memory-to-memory based on  */
 348 /*                the size of the variable. r0 is overwritten.      */
 349 /*                                                                  */
 350 /*------------------------------------------------------------------*/
 351
 352 static guint8 *
 353 emit_memcpy (guint8 *code, int size, int dreg, int doffset, int sreg, int soffset)
 354 {
 355         switch (size) {
 356                 case 4 :
 357                         s390_l  (code, s390_r0, 0, sreg, soffset);
 358                         s390_st (code, s390_r0, 0, dreg, doffset);
 359                         break;
 360
 361                 case 3 :
 362                         s390_icm  (code, s390_r0, 14, sreg, soffset);
 363                         s390_stcm (code, s390_r0, 14, dreg, doffset);
 364                         break;
 365
 366                 case 2 :
 367                         s390_lh  (code, s390_r0, 0, sreg, soffset);
 368                         s390_sth (code, s390_r0, 0, dreg, doffset);
 369                         break;
 370
 371                 case 1 :
 372                         s390_ic  (code, s390_r0, 0, sreg, soffset);
 373                         s390_stc (code, s390_r0, 0, dreg, doffset);
 374                         break;
 375
 376                 default :
 377                         while (size > 0) {
 378                                 int len;
 379
 380                                 if (size > 256)
 381                                         len = 256;
 382                                 else
 383                                         len = size;
 384                                 s390_mvc (code, len, dreg, doffset, sreg, soffset);
 385                                 size -= len;
 386                         }
 387         }
 388         return code;
 389 }
 390
 391 /*========================= End of Function ========================*/
 392
 393 /*------------------------------------------------------------------*/
 394 /*                                                                  */
 395 /* Name         - arch_get_argument_info                            */
 396 /*                                                                  */
 397 /* Function     - Gathers information on parameters such as size,   */
 398 /*                alignment, and padding. arg_info should be large  */
 399 /*                enough to hold param_count + 1 entries.           */
 400 /*                                                                  */
 401 /* Parameters   - @csig - Method signature                          */
 402 /*                @param_count - No. of parameters to consider      */
 403 /*                @arg_info - An array to store the result info     */
 404 /*                                                                  */
 405 /* Returns      - Size of the activation frame                      */
 406 /*                                                                  */
 407 /*------------------------------------------------------------------*/
 408
 409 int
 410 mono_arch_get_argument_info (MonoMethodSignature *csig,
 411                              int param_count,
 412                              MonoJitArgumentInfo *arg_info)
 413 {
 414         int k, frame_size = 0;
 415         int size, align, pad;
 416         int offset = 8;
 417
 418         if (MONO_TYPE_ISSTRUCT (csig->ret)) {
 419                 frame_size += sizeof (gpointer);
 420                 offset += 4;
 421         }
 422
 423         arg_info [0].offset = offset;
 424
 425         if (csig->hasthis) {
 426                 frame_size += sizeof (gpointer);
 427                 offset += 4;
 428         }
 429
 430         arg_info [0].size = frame_size;
 431
 432         for (k = 0; k < param_count; k++) {
 433
 434                 if (csig->pinvoke)
 435                         size = mono_type_native_stack_size (csig->params [k], &align);
 436                 else
 437                         size = mono_type_stack_size (csig->params [k], &align);
 438
 439                 frame_size += pad = (align - (frame_size & (align - 1))) & (align - 1);
 440                 arg_info [k].pad = pad;
 441                 frame_size += size;
 442                 arg_info [k + 1].pad = 0;
 443                 arg_info [k + 1].size = size;
 444                 offset += pad;
 445                 arg_info [k + 1].offset = offset;
 446                 offset += size;
 447         }
 448
 449         align = MONO_ARCH_FRAME_ALIGNMENT;
 450         frame_size += pad = (align - (frame_size & (align - 1))) & (align - 1);
 451         arg_info [k].pad = pad;
 452
 453         return frame_size;
 454 }
 455
 456 /*========================= End of Function ========================*/
 457
 458 /*------------------------------------------------------------------*/
 459 /*                                                                  */
 460 /* Name         - retFitsInReg.                                     */
 461 /*                                                                  */
 462 /* Function     - Determines if a value can be returned in one or   */
 463 /*                two registers.                                    */
 464 /*                                                                  */
 465 /*------------------------------------------------------------------*/
 466
 467 static inline gboolean
 468 retFitsInReg(guint32 size)
 469 {
 470         switch (size) {
 471                 case 0:
 472                 case 1:
 473                 case 2:
 474                 case 4:
 475                 case 8:
 476                         return (TRUE);
 477                 break;
 478                 default:
 479                         return (FALSE);
 480         }
 481 }
 482
 483 /*========================= End of Function ========================*/
 484
 485 /*------------------------------------------------------------------*/
 486 /*                                                                  */
 487 /* Name         - backStackPtr.                                     */
 488 /*                                                                  */
 489 /* Function     - Restore Stack Pointer to previous frame.          */
 490 /*                                                                  */
 491 /*------------------------------------------------------------------*/
 492
 493 static inline guint8 *
 494 backUpStackPtr(MonoCompile *cfg, guint8 *code, gint framePtr)
 495 {
 496         int stackSize = cfg->stack_usage;
 497
 498         if (s390_is_uimm16 (cfg->stack_usage)) {
 499                 s390_ahi  (code, framePtr, cfg->stack_usage);
 500         } else {
 501                 while (stackSize > 32767) {
 502                         s390_ahi  (code, framePtr, 32767);
 503                         stackSize -= 32767;
 504                 }
 505                 s390_ahi  (code, framePtr, stackSize);
 506         }
 507         return (code);
 508 }
 509
 510 /*========================= End of Function ========================*/
 511
 512 /*------------------------------------------------------------------*/
 513 /*                                                                  */
 514 /* Name         - indent                                            */
 515 /*                                                                  */
 516 /* Function     - Perform nice indenting to current level           */
 517 /*                                                                  */
 518 /*------------------------------------------------------------------*/
 519
 520 static void
 521 indent (int diff) {
 522         int v;
 523         if (diff < 0)
 524                 indent_level += diff;
 525         v = indent_level;
 526         printf("[%3d] ",v);
 527         while (v-- > 0) {
 528                 printf (". ");
 529         }
 530         if (diff > 0)
 531                 indent_level += diff;
 532 }
 533
 534 /*========================= End of Function ========================*/
 535
 536 /*------------------------------------------------------------------*/
 537 /*                                                                  */
 538 /* Name         - decodeParm                                        */
 539 /*                                                                  */
 540 /* Function     - Decode a parameter for the trace.                 */
 541 /*                                                                  */
 542 /*------------------------------------------------------------------*/
 543
 544 static void
 545 decodeParm(MonoType *type, void *curParm, int size)
 546 {
 547         guint32 simpleType;
 548
 549         if (type->byref) {
 550                 printf("[BYREF:%p], ", *((char **) curParm));
 551         } else {
 552                 simpleType = mono_type_get_underlying_type(type)->type;
 553 enum_parmtype:
 554                 switch (simpleType) {
 555                         case MONO_TYPE_I :
 556                                 printf ("[INTPTR:%p], ", *((int **) curParm));
 557                                 break;
 558                         case MONO_TYPE_U :
 559                                 printf ("[UINTPTR:%p], ", *((int **) curParm));
 560                                 break;
 561                         case MONO_TYPE_BOOLEAN :
 562                                 printf ("[BOOL:%d], ", *((int *) curParm));
 563                                 break;
 564                         case MONO_TYPE_CHAR :
 565                                 printf ("[CHAR:%c], ", *((int *) curParm));
 566                                 break;
 567                         case MONO_TYPE_I1 :
 568                                 printf ("[INT1:%d], ", *((int *) curParm));
 569                                 break;
 570                         case MONO_TYPE_I2 :
 571                                 printf ("[INT2:%d], ", *((int *) curParm));
 572                                 break;
 573                         case MONO_TYPE_I4 :
 574                                 printf ("[INT4:%d], ", *((int *) curParm));
 575                                 break;
 576                         case MONO_TYPE_U1 :
 577                                 printf ("[UINT1:%u], ", *((unsigned int *) curParm));
 578                                 break;
 579                         case MONO_TYPE_U2 :
 580                                 printf ("[UINT2:%u], ", *((guint16 *) curParm));
 581                                 break;
 582                         case MONO_TYPE_U4 :
 583                                 printf ("[UINT4:%u], ", *((guint32 *) curParm));
 584                                 break;
 585                         case MONO_TYPE_U8 :
 586                                 printf ("[UINT8:%llu], ", *((guint64 *) curParm));
 587                                 break;
 588                         case MONO_TYPE_STRING : {
 589                                 MonoString *s = *((MonoString **) curParm);
 590                                 if (s) {
 591                                         g_assert (((MonoObject *) s)->vtable->klass == mono_defaults.string_class);
 592                                         printf("[STRING:%p:%s], ", s, mono_string_to_utf8(s));
 593                                 } else {
 594                                         printf("[STRING:null], ");
 595                                 }
 596                                 break;
 597                         }
 598                         case MONO_TYPE_CLASS :
 599                         case MONO_TYPE_OBJECT : {
 600                                 MonoObject *obj = *((MonoObject **) curParm);
 601                                 MonoClass *class;
 602                                 if ((obj) && (obj->vtable)) {
 603                                         printf("[CLASS/OBJ:");
 604                                         class = obj->vtable->klass;
 605                                         printf("%p [%p] ",obj,curParm);
 606 //                                      if (class == mono_defaults.string_class) {
 607 //                                              printf("[STRING:%p:%s]",
 608 //                                                     *obj, mono_string_to_utf8 (obj));
 609 //                                      } else if (class == mono_defaults.int32_class) {
 610 //                                              printf("[INT32:%p:%d]",
 611 //                                                      obj, *(gint32 *)((char *)obj + sizeof (MonoObject)));
 612 //                                      } else
 613 //                                              printf("[%s.%s:%p]",
 614 //                                                     class->name_space, class->name, obj);
 615                                         printf("], ");
 616                                 } else {
 617                                         printf("[OBJECT:null], ");
 618                                 }
 619                                 break;
 620                         }
 621                         case MONO_TYPE_PTR :
 622                                 printf("[PTR:%p], ", *((gpointer **) (curParm)));
 623                                 break;
 624                         case MONO_TYPE_FNPTR :
 625                                 printf("[FNPTR:%p], ", *((gpointer **) (curParm)));
 626                                 break;
 627                         case MONO_TYPE_ARRAY :
 628                                 printf("[ARRAY:%p], ", *((gpointer **) (curParm)));
 629                                 break;
 630                         case MONO_TYPE_SZARRAY :
 631                                 printf("[SZARRAY:%p], ", *((gpointer **) (curParm)));
 632                                 break;
 633                         case MONO_TYPE_I8 :
 634                                 printf("[INT8:%lld], ", *((gint64 *) (curParm)));
 635                                 break;
 636                         case MONO_TYPE_R4 :
 637                                 printf("[FLOAT4:%g], ", *((double *) (curParm)));
 638                                 break;
 639                         case MONO_TYPE_R8 :
 640                                 printf("[FLOAT8:%g], ", *((double *) (curParm)));
 641                                 break;
 642                         case MONO_TYPE_VALUETYPE : {
 643                                 int i;
 644                                 MonoMarshalType *info;
 645
 646                                 if (type->data.klass->enumtype) {
 647                                         simpleType = type->data.klass->enum_basetype->type;
 648                                         printf("{VALUETYPE} - ");
 649                                         goto enum_parmtype;
 650                                 }
 651
 652                                 info = mono_marshal_load_type_info (type->data.klass);
 653
 654                                 if ((info->native_size == sizeof(float)) &&
 655                                     (info->num_fields  == 1) &&
 656                                     (info->fields[0].field->type->type == MONO_TYPE_R4)) {
 657                                                 printf("[FLOAT4:%f], ", *((float *) (curParm)));
 658                                         break;
 659                                 }
 660
 661                                 if ((info->native_size == sizeof(double)) &&
 662                                     (info->num_fields  == 1) &&
 663                                     (info->fields[0].field->type->type == MONO_TYPE_R8)) {
 664                                         printf("[FLOAT8:%g], ", *((double *) (curParm)));
 665                                         break;
 666                                 }
 667
 668                                 printf("[VALUETYPE:");
 669                                 for (i = 0; i < size; i++)
 670                                         printf("%02x,", *((guint8 *)curParm+i));
 671                                 printf("]");
 672                                 break;
 673                         }
 674                         case MONO_TYPE_TYPEDBYREF: {
 675                                 int i;
 676                                 printf("[TYPEDBYREF:");
 677                                 for (i = 0; i < size; i++)
 678                                         printf("%02x,", *((guint8 *)curParm+i));
 679                                 printf("]");
 680                                 break;
 681                         }
 682                         default :
 683                                 printf("[?? - %d], ",simpleType);
 684                 }
 685         }
 686 }
 687
 688 /*========================= End of Function ========================*/
 689
 690 static int lc = 0;
 691 /*------------------------------------------------------------------*/
 692 /*                                                                  */
 693 /* Name         - enter_method                                      */
 694 /*                                                                  */
 695 /* Function     - Perform tracing of the entry to the current       */
 696 /*                method.                                           */
 697 /*                                                                  */
 698 /*------------------------------------------------------------------*/
 699
 700 static void
 701 enter_method (MonoMethod *method, RegParm *rParm, char *sp)
 702 {
 703         int i, oParm = 0, iParm = 0;
 704         MonoClass *class;
 705         MonoObject *obj;
 706         MonoMethodSignature *sig;
 707         char *fname;
 708         guint32 ip;
 709         CallInfo *cinfo;
 710         ArgInfo *ainfo;
 711         size_data sz;
 712         void *curParm;
 713
 714
 715 lc++;
 716 if (lc > 5000000) {
 717 fseek(stdout, 0L, SEEK_SET);
 718 lc = 0;
 719 }
 720         fname = mono_method_full_name (method, TRUE);
 721         indent (1);
 722         printf ("ENTER: %s(", fname);
 723         g_free (fname);
 724
 725         ip  = (*(guint32 *) (sp+S390_RET_ADDR_OFFSET)) & 0x7fffffff;
 726         printf (") ip: %p sp: %p - ", (gpointer) ip, sp);
 727
 728         if (rParm == NULL)
 729                 return;
 730
 731         sig = mono_method_signature (method);
 732
 733         cinfo = calculate_sizes (sig, &sz, sig->pinvoke);
 734
 735         if (cinfo->struct_ret) {
 736                 printf ("[STRUCTRET:%p], ", (gpointer) rParm->gr[0]);
 737                 iParm = 1;
 738         }
 739
 740         if (sig->hasthis) {
 741                 gpointer *this = (gpointer *) rParm->gr[iParm];
 742                 obj = (MonoObject *) this;
 743                 if (method->klass->valuetype) {
 744                         if (obj) {
 745                                 printf("this:[value:%p:%08x], ",
 746                                        this, *((guint32 *)(this+sizeof(MonoObject))));
 747                         } else
 748                                 printf ("this:[NULL], ");
 749                 } else {
 750                         if (obj) {
 751 //                              class = obj->vtable->klass;
 752 //                              if (class == mono_defaults.string_class) {
 753 //                                      printf ("this:[STRING:%p:%s], ",
 754 //                                              obj, mono_string_to_utf8 ((MonoString *)obj));
 755 //                              } else {
 756 //                                      printf ("this:%p[%s.%s], ",
 757 //                                              obj, class->name_space, class->name);
 758 //                              }
 759 printf("this:%p, ",obj);
 760                         } else
 761                                 printf ("this:NULL, ");
 762                 }
 763                 oParm++;
 764         }
 765
 766         for (i = 0; i < sig->param_count; ++i) {
 767                 ainfo = &cinfo->args[i + oParm];
 768                 switch (ainfo->regtype) {
 769                         case RegTypeGeneral :
 770                                 decodeParm(sig->params[i], &(rParm->gr[ainfo->reg-2]), ainfo->size);
 771                                 break;
 772                         case RegTypeFP :
 773                                 decodeParm(sig->params[i], &(rParm->fp[ainfo->reg]), ainfo->size);
 774                                 break;
 775                         case RegTypeBase :
 776                                 decodeParm(sig->params[i], sp+ainfo->offset, ainfo->size);
 777                                 break;
 778                         case RegTypeStructByVal :
 779                                 if (ainfo->reg != STK_BASE)
 780                                         curParm = &(rParm->gr[ainfo->reg-2]);
 781                                 else
 782                                         curParm = sp+ainfo->offset;
 783
 784                                 if (retFitsInReg (ainfo->vtsize))
 785                                         decodeParm(sig->params[i],
 786                                                    curParm,
 787                                                    ainfo->size);
 788                                 else
 789                                         decodeParm(sig->params[i],
 790                                                    *((char **) curParm),
 791                                                    ainfo->vtsize);
 792                                 break;
 793                         case RegTypeStructByAddr :
 794                                 if (ainfo->reg != STK_BASE)
 795                                         curParm = &(rParm->gr[ainfo->reg-2]);
 796                                 else
 797                                         curParm = sp+ainfo->offset;
 798
 799                                 decodeParm(sig->params[i],
 800                                            *((char **) curParm),
 801                                            ainfo->vtsize);
 802                                 break;
 803
 804                         default :
 805                                 printf("???, ");
 806                 }
 807         }
 808         printf("\n");
 809         g_free(cinfo);
 810 }
 811
 812 /*========================= End of Function ========================*/
 813
 814 /*------------------------------------------------------------------*/
 815 /*                                                                  */
 816 /* Name         - leave_method                                      */
 817 /*                                                                  */
 818 /* Function     -                                                   */
 819 /*                                                                  */
 820 /*------------------------------------------------------------------*/
 821
 822 static void
 823 leave_method (MonoMethod *method, ...)
 824 {
 825         MonoType *type;
 826         char *fname;
 827         guint32 ip;
 828         va_list ap;
 829
 830         va_start(ap, method);
 831
 832         fname = mono_method_full_name (method, TRUE);
 833         indent (-1);
 834         printf ("LEAVE: %s", fname);
 835         g_free (fname);
 836
 837         type = mono_method_signature (method)->ret;
 838
 839 handle_enum:
 840         switch (type->type) {
 841         case MONO_TYPE_VOID:
 842                 break;
 843         case MONO_TYPE_BOOLEAN: {
 844                 int val = va_arg (ap, int);
 845                 if (val)
 846                         printf ("[TRUE:%d]", val);
 847                 else
 848                         printf ("[FALSE]");
 849
 850                 break;
 851         }
 852         case MONO_TYPE_CHAR: {
 853                 int val = va_arg (ap, int);
 854                 printf ("[CHAR:%d]", val);
 855                 break;
 856         }
 857         case MONO_TYPE_I1: {
 858                 int val = va_arg (ap, int);
 859                 printf ("[INT1:%d]", val);
 860                 break;
 861         }
 862         case MONO_TYPE_U1: {
 863                 int val = va_arg (ap, int);
 864                 printf ("[UINT1:%d]", val);
 865                 break;
 866         }
 867         case MONO_TYPE_I2: {
 868                 int val = va_arg (ap, int);
 869                 printf ("[INT2:%d]", val);
 870                 break;
 871         }
 872         case MONO_TYPE_U2: {
 873                 int val = va_arg (ap, int);
 874                 printf ("[UINT2:%d]", val);
 875                 break;
 876         }
 877         case MONO_TYPE_I4: {
 878                 int val = va_arg (ap, int);
 879                 printf ("[INT4:%d]", val);
 880                 break;
 881         }
 882         case MONO_TYPE_U4: {
 883                 int val = va_arg (ap, int);
 884                 printf ("[UINT4:%d]", val);
 885                 break;
 886         }
 887         case MONO_TYPE_I: {
 888                 int val = va_arg (ap, int);
 889                 printf ("[INT:%d]", val);
 890                 printf("]");
 891                 break;
 892         }
 893         case MONO_TYPE_U: {
 894                 int val = va_arg (ap, int);
 895                 printf ("[UINT:%d]", val);
 896                 printf("]");
 897                 break;
 898         }
 899         case MONO_TYPE_STRING: {
 900                 MonoString *s = va_arg (ap, MonoString *);
 901 ;
 902                 if (s) {
 903                         g_assert (((MonoObject *)s)->vtable->klass == mono_defaults.string_class);
 904                         printf ("[STRING:%p:%s]", s, mono_string_to_utf8 (s));
 905                 } else
 906                         printf ("[STRING:null], ");
 907                 break;
 908         }
 909         case MONO_TYPE_CLASS:
 910         case MONO_TYPE_OBJECT: {
 911                 MonoObject *o = va_arg (ap, MonoObject *);
 912
 913 //              if ((o) && (o->vtable)) {
 914 //                      if (o->vtable->klass == mono_defaults.boolean_class) {
 915 //                              printf ("[BOOLEAN:%p:%d]", o, *((guint8 *)o + sizeof (MonoObject)));
 916 //                      } else if  (o->vtable->klass == mono_defaults.int32_class) {
 917 //                              printf ("[INT32:%p:%d]", o, *((gint32 *)((char *)o + sizeof (MonoObject))));
 918 //                      } else if  (o->vtable->klass == mono_defaults.int64_class) {
 919 //                              printf ("[INT64:%p:%lld]", o, *((gint64 *)((char *)o + sizeof (MonoObject))));
 920 //                      } else
 921 //                              printf ("[%s.%s:%p]", o->vtable->klass->name_space, o->vtable->klass->name, o);
 922 //              } else
 923                         printf ("[OBJECT:%p]", o);
 924
 925                 break;
 926         }
 927         case MONO_TYPE_PTR:
 928         case MONO_TYPE_FNPTR:
 929         case MONO_TYPE_ARRAY:
 930         case MONO_TYPE_SZARRAY: {
 931                 gpointer p = va_arg (ap, gpointer);
 932                 printf ("[result=%p]", p);
 933                 break;
 934         }
 935         case MONO_TYPE_I8: {
 936                 gint64 l =  va_arg (ap, gint64);
 937                 printf ("[LONG:%lld]", l);
 938                 break;
 939         }
 940         case MONO_TYPE_U8: {
 941                 guint64 l =  va_arg (ap, guint64);
 942                 printf ("[ULONG:%llu]", l);
 943                 break;
 944         }
 945         case MONO_TYPE_R4: {
 946                 double f;
 947                 f = va_arg (ap, double);
 948                 printf ("[FLOAT4:%g]\n", f);
 949                 break;
 950         }
 951         case MONO_TYPE_R8: {
 952                 double f = va_arg (ap, double);
 953                 printf ("[FLOAT8:%g]\n", f);
 954                 break;
 955         }
 956         case MONO_TYPE_VALUETYPE: {
 957                 MonoMarshalType *info;
 958                 if (type->data.klass->enumtype) {
 959                         type = type->data.klass->enum_basetype;
 960                         goto handle_enum;
 961                 } else {
 962                         guint8 *p = va_arg (ap, gpointer);
 963                         int j, size, align;
 964
 965                         info = mono_marshal_load_type_info (type->data.klass);
 966
 967                         if ((info->native_size == sizeof(float)) &&
 968                             (info->num_fields  == 1) &&
 969                             (info->fields[0].field->type->type == MONO_TYPE_R4)) {
 970                                 double f = va_arg (ap, double);
 971                                 printf("[FLOAT4:%g]\n", (double) f);
 972                                 break;
 973                         }
 974
 975                         if ((info->native_size == sizeof(double)) &&
 976                             (info->num_fields  == 1) &&
 977                             (info->fields[0].field->type->type == MONO_TYPE_R8)) {
 978                                 double f = va_arg (ap, double);
 979                                 printf("[FLOAT8:%g]\n", f);
 980                                 break;
 981                         }
 982
 983                         size = mono_type_size (type, &align);
 984                         switch (size) {
 985                         case 1:
 986                         case 2:
 987                         case 4:
 988                         case 8:
 989                                 printf ("[");
 990                                 for (j = 0; p && j < size; j++)
 991                                         printf ("%02x,", p [j]);
 992                                 printf ("]\n");
 993                                 break;
 994                         default:
 995                                 printf ("[VALUERET]\n");
 996                         }
 997                 }
 998                 break;
 999         }
1000         case MONO_TYPE_TYPEDBYREF: {
1001                 guint8 *p = va_arg (ap, gpointer);
1002                 int j, size, align;
1003                 size = mono_type_size (type, &align);
1004                 switch (size) {
1005                 case 1:
1006                 case 2:
1007                 case 4:
1008                 case 8:
1009                         printf ("[");
1010                         for (j = 0; p && j < size; j++)
1011                                 printf ("%02x,", p [j]);
1012                         printf ("]\n");
1013                         break;
1014                 default:
1015                         printf ("[TYPEDBYREF]\n");
1016                 }
1017         }
1018                 break;
1019         default:
1020                 printf ("(unknown return type %x)",
1021                         mono_method_signature (method)->ret->type);
1022         }
1023
1024         ip = ((gint32) __builtin_return_address (0)) & 0x7fffffff;
1025         printf (" ip: %p\n", (gpointer) ip);
1026 }
1027
1028 /*========================= End of Function ========================*/
1029
1030 /*------------------------------------------------------------------*/
1031 /*                                                                  */
1032 /* Name         - mono_arch_cpu_init                                */
1033 /*                                                                  */
1034 /* Function     - Perform CPU specific initialization to execute    */
1035 /*                managed code.                                     */
1036 /*                                                                  */
1037 /*------------------------------------------------------------------*/
1038
1039 void
1040 mono_arch_cpu_init (void)
1041 {
1042         guint mode = 1;
1043
1044         /*--------------------------------------*/
1045         /* Set default rounding mode for FP     */
1046         /*--------------------------------------*/
1047         __asm__ ("SRNM\t%0\n\t"
1048                 : : "m" (mode));
1049 }
1050
1051 /*========================= End of Function ========================*/
1052
1053 /*------------------------------------------------------------------*/
1054 /*                                                                  */
1055 /* Name         - mono_arch_cpu_optimizazions                       */
1056 /*                                                                  */
1057 /* Function     - Returns the optimizations supported on this CPU   */
1058 /*                                                                  */
1059 /*------------------------------------------------------------------*/
1060
1061 guint32
1062 mono_arch_cpu_optimizazions (guint32 *exclude_mask)
1063 {
1064         guint32 opts = 0;
1065
1066         /*----------------------------------------------------------*/
1067         /* no s390-specific optimizations yet                       */
1068         /*----------------------------------------------------------*/
1069         *exclude_mask = MONO_OPT_INLINE|MONO_OPT_LINEARS;
1070 //      *exclude_mask = MONO_OPT_INLINE;
1071         return opts;
1072 }
1073
1074 /*========================= End of Function ========================*/
1075
1076 /*------------------------------------------------------------------*/
1077 /*                                                                  */
1078 /* Name         -                                                   */
1079 /*                                                                  */
1080 /* Function     -                                                   */
1081 /*                                                                  */
1082 /*------------------------------------------------------------------*/
1083
1084 static gboolean
1085 is_regsize_var (MonoType *t) {
1086         if (t->byref)
1087                 return TRUE;
1088         switch (mono_type_get_underlying_type (t)->type) {
1089         case MONO_TYPE_I4:
1090         case MONO_TYPE_U4:
1091         case MONO_TYPE_I:
1092         case MONO_TYPE_U:
1093                 return TRUE;
1094         case MONO_TYPE_OBJECT:
1095         case MONO_TYPE_STRING:
1096         case MONO_TYPE_CLASS:
1097         case MONO_TYPE_SZARRAY:
1098         case MONO_TYPE_ARRAY:
1099                 return FALSE;
1100         case MONO_TYPE_VALUETYPE:
1101                 if (t->data.klass->enumtype)
1102                         return is_regsize_var (t->data.klass->enum_basetype);
1103                 return FALSE;
1104         }
1105         return FALSE;
1106 }
1107
1108 /*========================= End of Function ========================*/
1109
1110 /*------------------------------------------------------------------*/
1111 /*                                                                  */
1112 /* Name         - mono_arch_get_allocatable_int_vars                */
1113 /*                                                                  */
1114 /* Function     -                                                   */
1115 /*                                                                  */
1116 /*------------------------------------------------------------------*/
1117
1118 GList *
1119 mono_arch_get_allocatable_int_vars (MonoCompile *cfg)
1120 {
1121         GList *vars = NULL;
1122         int i;
1123
1124         for (i = 0; i < cfg->num_varinfo; i++) {
1125                 MonoInst *ins = cfg->varinfo [i];
1126                 MonoMethodVar *vmv = MONO_VARINFO (cfg, i);
1127
1128                 /* unused vars */
1129                 if (vmv->range.first_use.abs_pos >= vmv->range.last_use.abs_pos)
1130                         continue;
1131
1132                 if (ins->flags & (MONO_INST_VOLATILE|MONO_INST_INDIRECT) ||
1133                     (ins->opcode != OP_LOCAL && ins->opcode != OP_ARG))
1134                         continue;
1135
1136                 /* we can only allocate 32 bit values */
1137                 if (is_regsize_var (ins->inst_vtype)) {
1138                         g_assert (MONO_VARINFO (cfg, i)->reg == -1);
1139                         g_assert (i == vmv->idx);
1140                         vars = mono_varlist_insert_sorted (cfg, vars, vmv, FALSE);
1141                 }
1142         }
1143
1144         return vars;
1145 }
1146
1147 /*========================= End of Function ========================*/
1148
1149 /*------------------------------------------------------------------*/
1150 /*                                                                  */
1151 /* Name         - mono_arch_global_int_regs                         */
1152 /*                                                                  */
1153 /* Function     - Return a list of usable integer registers.        */
1154 /*                                                                  */
1155 /*------------------------------------------------------------------*/
1156
1157 GList *
1158 mono_arch_get_global_int_regs (MonoCompile *cfg)
1159 {
1160         GList *regs = NULL;
1161         MonoMethodHeader *header;
1162         int i, top = 13;
1163
1164         header = mono_method_get_header (cfg->method);
1165         if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
1166                 cfg->frame_reg = s390_r11;
1167
1168         for (i = 8; i < top; ++i) {
1169                 if (cfg->frame_reg != i)
1170                         regs = g_list_prepend (regs, GUINT_TO_POINTER (i));
1171         }
1172
1173         return regs;
1174 }
1175
1176 /*========================= End of Function ========================*/
1177
1178 /*------------------------------------------------------------------*/
1179 /*                                                                  */
1180 /* Name         -  mono_arch_flush_icache                           */
1181 /*                                                                  */
1182 /* Function     -  Flush the CPU icache.                            */
1183 /*                                                                  */
1184 /*------------------------------------------------------------------*/
1185
1186 void
1187 mono_arch_flush_icache (guint8 *code, gint size)
1188 {
1189 }
1190
1191 /*========================= End of Function ========================*/
1192
1193 /*------------------------------------------------------------------*/
1194 /*                                                                  */
1195 /* Name         - add_general                                       */
1196 /*                                                                  */
1197 /* Function     - Determine code and stack size incremements for a  */
1198 /*                parameter.                                        */
1199 /*                                                                  */
1200 /*------------------------------------------------------------------*/
1201
1202 static void inline
1203 add_general (guint *gr, size_data *sz, ArgInfo *ainfo, gboolean simple)
1204 {
1205         if (simple) {
1206                 if (*gr > S390_LAST_ARG_REG) {
1207                         sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1208                         ainfo->offset   = sz->stack_size;
1209                         ainfo->reg      = STK_BASE;
1210                         ainfo->regtype  = RegTypeBase;
1211                         sz->stack_size += sizeof(int);
1212                         sz->local_size += sizeof(int);
1213                         sz->offStruct  += sizeof(int);
1214                         sz->code_size  += 12;
1215                 } else {
1216                         ainfo->reg      = *gr;
1217                         sz->code_size  += 8;
1218                 }
1219         } else {
1220                 if (*gr > S390_LAST_ARG_REG - 1) {
1221                         sz->stack_size  = S390_ALIGN(sz->stack_size, S390_STACK_ALIGNMENT);
1222                         ainfo->offset   = sz->stack_size;
1223                         ainfo->reg      = STK_BASE;
1224                         ainfo->regtype  = RegTypeBase;
1225                         sz->stack_size += sizeof(long long);
1226                         sz->local_size += sizeof(long long);
1227                         sz->offStruct  += sizeof(long long);
1228                         sz->code_size  += 10;
1229                 } else {
1230                         ainfo->reg      = *gr;
1231                         sz->code_size  += 8;
1232                 }
1233                 (*gr) ++;
1234         }
1235         (*gr) ++;
1236 }
1237
1238 /*========================= End of Function ========================*/
1239
1240 /*------------------------------------------------------------------*/
1241 /*                                                                  */
1242 /* Name         - add_stackParm                                     */
1243 /*                                                                  */
1244 /* Function     - Determine code and stack size incremements for a  */
1245 /*                parameter.                                        */
1246 /*                                                                  */
1247 /*------------------------------------------------------------------*/
1248
1249 static void inline
1250 add_stackParm (guint *gr, size_data *sz, ArgInfo *ainfo, gint size)
1251 {
1252         if (*gr > S390_LAST_ARG_REG) {
1253                 sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1254                 ainfo->reg      = STK_BASE;
1255                 sz->parm_size  += sizeof(gpointer);
1256                 sz->offStruct  += sizeof(gpointer);
1257         } else {
1258                 ainfo->reg      = *gr;
1259         }
1260         (*gr) ++;
1261         ainfo->offset   = sz->stack_size;
1262         ainfo->offparm  = sz->offset;
1263         sz->offset      = S390_ALIGN(sz->offset+size, sizeof(long));
1264         ainfo->size     = size;
1265         ainfo->regtype  = RegTypeStructByAddr;
1266         ainfo->vtsize   = size;
1267         sz->parm_size  += size;
1268 }
1269
1270 /*========================= End of Function ========================*/
1271
1272 /*------------------------------------------------------------------*/
1273 /*                                                                  */
1274 /* Name         - add_float                                         */
1275 /*                                                                  */
1276 /* Function     - Determine code and stack size incremements for a  */
1277 /*                float parameter.                                  */
1278 /*                                                                  */
1279 /*------------------------------------------------------------------*/
1280
1281 static void inline
1282 add_float (guint *fr,  size_data *sz, ArgInfo *ainfo)
1283 {
1284         if ((*fr) <= S390_LAST_FPARG_REG) {
1285                 ainfo->regtype = RegTypeFP;
1286                 ainfo->reg     = *fr;
1287                 sz->code_size += 4;
1288                 (*fr) += 2;
1289         }
1290         else {
1291                 ainfo->offset   = sz->stack_size;
1292                 ainfo->reg      = STK_BASE;
1293                 ainfo->regtype  = RegTypeBase;
1294                 sz->code_size  += 4;
1295                 sz->stack_size += ainfo->size;
1296                 sz->local_size += ainfo->size;
1297                 sz->offStruct  += ainfo->size;
1298         }
1299 }
1300
1301 /*========================= End of Function ========================*/
1302
1303 /*------------------------------------------------------------------*/
1304 /*                                                                  */
1305 /* Name         - calculate_sizes                                   */
1306 /*                                                                  */
1307 /* Function     - Determine the amount of space required for code   */
1308 /*                and stack. In addition determine starting points  */
1309 /*                for stack-based parameters, and area for struct-  */
1310 /*                ures being returned on the stack.                 */
1311 /*                                                                  */
1312 /*------------------------------------------------------------------*/
1313
1314 static CallInfo *
1315 calculate_sizes (MonoMethodSignature *sig, size_data *sz,
1316                  gboolean string_ctor)
1317 {
1318         guint i, fr, gr, size;
1319         int nParm = sig->hasthis + sig->param_count;
1320         guint32 simpletype, align;
1321         CallInfo *cinfo = g_malloc0 (sizeof (CallInfo) + sizeof (ArgInfo) * nParm);
1322
1323         fr                = 0;
1324         gr                = s390_r2;
1325         nParm             = 0;
1326         cinfo->struct_ret = 0;
1327         sz->offset        = 0;
1328         sz->offStruct     = S390_MINIMAL_STACK_SIZE;
1329         sz->retStruct     = 0;
1330         sz->stack_size    = S390_MINIMAL_STACK_SIZE;
1331         sz->code_size     = 0;
1332         sz->parm_size     = 0;
1333         sz->local_size    = 0;
1334
1335         /*----------------------------------------------------------*/
1336         /* We determine the size of the return code/stack in case we*/
1337         /* need to reserve a register to be used to address a stack */
1338         /* area that the callee will use.                           */
1339         /*----------------------------------------------------------*/
1340
1341         simpletype = mono_type_get_underlying_type (sig->ret)->type;
1342 enum_retvalue:
1343         switch (simpletype) {
1344                 case MONO_TYPE_BOOLEAN:
1345                 case MONO_TYPE_I1:
1346                 case MONO_TYPE_U1:
1347                 case MONO_TYPE_I2:
1348                 case MONO_TYPE_U2:
1349                 case MONO_TYPE_CHAR:
1350                 case MONO_TYPE_I4:
1351                 case MONO_TYPE_U4:
1352                 case MONO_TYPE_I:
1353                 case MONO_TYPE_U:
1354                 case MONO_TYPE_CLASS:
1355                 case MONO_TYPE_OBJECT:
1356                 case MONO_TYPE_SZARRAY:
1357                 case MONO_TYPE_ARRAY:
1358                 case MONO_TYPE_PTR:
1359                 case MONO_TYPE_FNPTR:
1360                 case MONO_TYPE_STRING:
1361                         cinfo->ret.reg = s390_r2;
1362                         sz->code_size += 4;
1363                         break;
1364                 case MONO_TYPE_R4:
1365                 case MONO_TYPE_R8:
1366                         cinfo->ret.reg = s390_f0;
1367                         sz->code_size += 4;
1368                         break;
1369                 case MONO_TYPE_I8:
1370                 case MONO_TYPE_U8:
1371                         cinfo->ret.reg = s390_r2;
1372                         sz->code_size += 4;
1373                         break;
1374                 case MONO_TYPE_VALUETYPE: {
1375                         MonoClass *klass = mono_class_from_mono_type (sig->ret);
1376                         if (sig->ret->data.klass->enumtype) {
1377                                 simpletype = sig->ret->data.klass->enum_basetype->type;
1378                                 goto enum_retvalue;
1379                         }
1380                         if (sig->pinvoke)
1381                                 size = mono_class_native_size (klass, &align);
1382                         else
1383                                 size = mono_class_value_size (klass, &align);
1384
1385                         cinfo->ret.reg    = s390_r2;
1386                         cinfo->struct_ret = 1;
1387                         cinfo->ret.size   = size;
1388                         cinfo->ret.vtsize = size;
1389                         gr++;
1390                         break;
1391                 }
1392                 case MONO_TYPE_TYPEDBYREF:
1393                         size = sizeof (MonoTypedRef);
1394                         cinfo->ret.reg    = s390_r2;
1395                         cinfo->struct_ret = 1;
1396                         cinfo->ret.size   = size;
1397                         cinfo->ret.vtsize = size;
1398                         gr++;
1399                         break;
1400                 case MONO_TYPE_VOID:
1401                         break;
1402                 default:
1403                         g_error ("Can't handle as return value 0x%x", sig->ret->type);
1404         }
1405
1406         if (sig->hasthis) {
1407                 add_general (&gr, sz, cinfo->args+nParm, TRUE);
1408                 cinfo->args[nParm].size = sizeof(gpointer);
1409                 nParm++;
1410         }
1411
1412         /*----------------------------------------------------------*/
1413         /* We determine the size of the parameter code and stack    */
1414         /* requirements by checking the types and sizes of the      */
1415         /* parameters.                                              */
1416         /*----------------------------------------------------------*/
1417
1418         for (i = 0; i < sig->param_count; ++i) {
1419                 /*--------------------------------------------------*/
1420                 /* Handle vararg type calls. All args are put on    */
1421                 /* the stack.                                       */
1422                 /*--------------------------------------------------*/
1423                 if ((sig->call_convention == MONO_CALL_VARARG) &&
1424                     (i == sig->sentinelpos)) {
1425                         gr = S390_LAST_ARG_REG + 1;
1426                         add_general (&gr, sz, &cinfo->sigCookie, TRUE);
1427                 }
1428
1429                 if (sig->params [i]->byref) {
1430                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1431                         cinfo->args[nParm].size = sizeof(gpointer);
1432                         nParm++;
1433                         continue;
1434                 }
1435
1436                 simpletype = mono_type_get_underlying_type(sig->params [i])->type;
1437                 switch (simpletype) {
1438                 case MONO_TYPE_BOOLEAN:
1439                 case MONO_TYPE_I1:
1440                 case MONO_TYPE_U1:
1441                         cinfo->args[nParm].size = sizeof(char);
1442                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1443                         nParm++;
1444                         break;
1445                 case MONO_TYPE_I2:
1446                 case MONO_TYPE_U2:
1447                 case MONO_TYPE_CHAR:
1448                         cinfo->args[nParm].size = sizeof(short);
1449                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1450                         nParm++;
1451                         break;
1452                 case MONO_TYPE_I4:
1453                 case MONO_TYPE_U4:
1454                         cinfo->args[nParm].size = sizeof(int);
1455                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1456                         nParm++;
1457                         break;
1458                 case MONO_TYPE_I:
1459                 case MONO_TYPE_U:
1460                 case MONO_TYPE_PTR:
1461                 case MONO_TYPE_FNPTR:
1462                 case MONO_TYPE_CLASS:
1463                 case MONO_TYPE_OBJECT:
1464                 case MONO_TYPE_STRING:
1465                 case MONO_TYPE_SZARRAY:
1466                 case MONO_TYPE_ARRAY:
1467                         cinfo->args[nParm].size = sizeof(gpointer);
1468                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1469                         nParm++;
1470                         break;
1471                 case MONO_TYPE_I8:
1472                 case MONO_TYPE_U8:
1473                         cinfo->args[nParm].size = sizeof(long long);
1474                         add_general (&gr, sz, cinfo->args+nParm, FALSE);
1475                         nParm++;
1476                         break;
1477                 case MONO_TYPE_R4:
1478                         cinfo->args[nParm].size = sizeof(float);
1479                         add_float (&fr, sz, cinfo->args+nParm);
1480                         nParm++;
1481                         break;
1482                 case MONO_TYPE_R8:
1483                         cinfo->args[nParm].size = sizeof(double);
1484                         add_float (&fr, sz, cinfo->args+nParm);
1485                         nParm++;
1486                         break;
1487                 case MONO_TYPE_VALUETYPE: {
1488                         MonoMarshalType *info;
1489                         MonoClass *klass = mono_class_from_mono_type (sig->params [i]);
1490                         if (sig->pinvoke)
1491                                 size = mono_class_native_size (klass, &align);
1492                         else
1493                                 size = mono_class_value_size (klass, &align);
1494
1495                         info = mono_marshal_load_type_info (klass);
1496
1497                         if ((info->native_size == sizeof(float)) &&
1498                             (info->num_fields  == 1) &&
1499                             (info->fields[0].field->type->type == MONO_TYPE_R4)) {
1500                                 cinfo->args[nParm].size = sizeof(float);
1501                                 add_float(&fr, sz, cinfo->args+nParm);
1502                                 break;
1503                         }
1504
1505                         if ((info->native_size == sizeof(double)) &&
1506                             (info->num_fields  == 1) &&
1507                             (info->fields[0].field->type->type == MONO_TYPE_R8)) {
1508                                 cinfo->args[nParm].size = sizeof(double);
1509                                 add_float(&fr, sz, cinfo->args+nParm);
1510                                 break;
1511                         }
1512
1513                         cinfo->args[nParm].vtsize  = 0;
1514                         cinfo->args[nParm].size    = 0;
1515
1516                         switch (size) {
1517                                 /*----------------------------------*/
1518                                 /* On S/390, structures of size 1,  */
1519                                 /* 2, 4, and 8 bytes are passed in  */
1520                                 /* (a) register(s).                 */
1521                                 /*----------------------------------*/
1522                                 case 0:
1523                                 case 1:
1524                                 case 2:
1525                                 case 4:
1526                                         add_general(&gr, sz, cinfo->args+nParm, TRUE);
1527                                         cinfo->args[nParm].size    = size;
1528                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1529                                         nParm++;
1530                                         sz->local_size            += sizeof(long);
1531                                         break;
1532                                 case 8:
1533                                         add_general(&gr, sz, cinfo->args+nParm, FALSE);
1534                                         cinfo->args[nParm].size    = sizeof(long long);
1535                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1536                                         nParm++;
1537                                         sz->local_size            += sizeof(long);
1538                                         break;
1539                                 default:
1540                                         add_stackParm(&gr, sz, cinfo->args+nParm, size);
1541                                         nParm++;
1542                         }
1543                 }
1544                         break;
1545                 case MONO_TYPE_TYPEDBYREF: {
1546                         int size = sizeof (MonoTypedRef);
1547
1548                         cinfo->args[nParm].vtsize  = 0;
1549                         cinfo->args[nParm].size    = 0;
1550
1551                         switch (size) {
1552                                 /*----------------------------------*/
1553                                 /* On S/390, structures of size 1,  */
1554                                 /* 2, 4, and 8 bytes are passed in  */
1555                                 /* (a) register(s).                 */
1556                                 /*----------------------------------*/
1557                                 case 0:
1558                                 case 1:
1559                                 case 2:
1560                                 case 4:
1561                                         add_general(&gr, sz, cinfo->args+nParm, TRUE);
1562                                         cinfo->args[nParm].size    = size;
1563                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1564                                         nParm++;
1565                                         sz->local_size            += sizeof(long);
1566                                         break;
1567                                 case 8:
1568                                         add_general(&gr, sz, cinfo->args+nParm, FALSE);
1569                                         cinfo->args[nParm].size    = sizeof(long long);
1570                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1571                                         nParm++;
1572                                         sz->local_size            += sizeof(long);
1573                                         break;
1574                                 default:
1575                                         add_stackParm(&gr, sz, cinfo->args+nParm, size);
1576                                         nParm++;
1577                         }
1578                 }
1579                         break;
1580                 default:
1581                         g_error ("Can't trampoline 0x%x", sig->params [i]->type);
1582                 }
1583         }
1584
1585         /*----------------------------------------------------------*/
1586         /* If we are passing a structure back then if it won't be   */
1587         /* in a register(s) then we make room at the end of the     */
1588         /* parameters that may have been placed on the stack        */
1589         /*----------------------------------------------------------*/
1590         if (cinfo->struct_ret) {
1591                 cinfo->ret.offset = sz->stack_size;
1592                 switch (cinfo->ret.size) {
1593                 case 0:
1594                 case 1:
1595                 case 2:
1596                 case 4:
1597                 case 8:
1598                         break;
1599                 default:
1600                         sz->stack_size   += S390_ALIGN(cinfo->ret.size, align);
1601                 }
1602         }
1603
1604         sz->stack_size  = sz->stack_size + sz->local_size + sz->parm_size +
1605                           sz->offset;
1606         sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1607
1608         return (cinfo);
1609 }
1610
1611 /*========================= End of Function ========================*/
1612
1613 /*------------------------------------------------------------------*/
1614 /*                                                                  */
1615 /* Name         - mono_arch_allocate_vars                           */
1616 /*                                                                  */
1617 /* Function     - Set var information according to the calling      */
1618 /*                convention for S/390. The local var stuff should  */
1619 /*                most likely be split in another method.           */
1620 /*                                                                  */
1621 /* Parameter    - @m - Compile unit.                                */
1622 /*                                                                  */
1623 /*------------------------------------------------------------------*/
1624
1625 void
1626 mono_arch_allocate_vars (MonoCompile *cfg)
1627 {
1628         MonoMethodSignature *sig;
1629         MonoMethodHeader *header;
1630         MonoInst *inst;
1631         CallInfo *cinfo;
1632         size_data sz;
1633         int iParm, iVar, offset, size, align, curinst;
1634         int frame_reg = STK_BASE;
1635         int sArg, eArg;
1636
1637         header  = mono_method_get_header (cfg->method);
1638
1639         cfg->flags |= MONO_CFG_HAS_SPILLUP;
1640
1641         /*---------------------------------------------------------*/
1642         /* We use the frame register also for any method that has  */
1643         /* filter clauses. This way, when the handlers are called, */
1644         /* the code will reference local variables using the frame */
1645         /* reg instead of the stack pointer: if we had to restore  */
1646         /* the stack pointer, we'd corrupt the method frames that  */
1647         /* are already on the stack (since filters get called      */
1648         /* before stack unwinding happens) when the filter code    */
1649         /* would call any method.                                  */
1650         /*---------------------------------------------------------*/
1651         if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
1652                 frame_reg = s390_r11;
1653
1654         cfg->frame_reg = frame_reg;
1655
1656         if (frame_reg != STK_BASE)
1657                 cfg->used_int_regs |= 1 << frame_reg;
1658
1659         sig     = mono_method_signature (cfg->method);
1660
1661         cinfo   = calculate_sizes (sig, &sz, sig->pinvoke);
1662
1663         if (cinfo->struct_ret) {
1664                 cfg->ret->opcode = OP_REGVAR;
1665                 cfg->ret->inst_c0 = s390_r2;
1666         } else {
1667                 switch (mono_type_get_underlying_type (sig->ret)->type) {
1668                 case MONO_TYPE_VOID:
1669                         break;
1670                 default:
1671                         cfg->ret->opcode = OP_REGVAR;
1672                         cfg->ret->dreg   = s390_r2;
1673                         break;
1674                 }
1675         }
1676
1677         /*--------------------------------------------------------------*/
1678         /* local vars are at a positive offset from the stack pointer   */
1679         /* also note that if the function uses alloca, we use s390_r11  */
1680         /* to point at the local variables.                             */
1681         /* add parameter area size for called functions                 */
1682         /*--------------------------------------------------------------*/
1683         offset          = (cfg->param_area + S390_MINIMAL_STACK_SIZE);
1684         cfg->sig_cookie = 0;
1685
1686         if (cinfo->struct_ret) {
1687                 inst               = cfg->ret;
1688                 offset             = S390_ALIGN(offset, sizeof(gpointer));
1689                 inst->inst_offset  = offset;
1690                 inst->opcode       = OP_REGOFFSET;
1691                 inst->inst_basereg = frame_reg;
1692                 offset            += sizeof(gpointer);
1693                 if ((sig->call_convention == MONO_CALL_VARARG) &&
1694                     (!retFitsInReg (cinfo->ret.size)))
1695                         cfg->sig_cookie += cinfo->ret.size;
1696         }
1697
1698         if (sig->hasthis) {
1699                 inst = cfg->varinfo [0];
1700                 if (inst->opcode != OP_REGVAR) {
1701                         inst->opcode       = OP_REGOFFSET;
1702                         inst->inst_basereg = frame_reg;
1703                         offset             = S390_ALIGN(offset, sizeof(gpointer));
1704                         inst->inst_offset  = offset;
1705                         offset            += sizeof (gpointer);
1706                 }
1707                 curinst = sArg = 1;
1708         } else {
1709                 curinst = sArg = 0;
1710         }
1711
1712         eArg = sig->param_count + sArg;
1713
1714         if (sig->call_convention == MONO_CALL_VARARG)
1715                 cfg->sig_cookie += S390_MINIMAL_STACK_SIZE;
1716
1717         for (iParm = sArg; iParm < eArg; ++iParm) {
1718                 inst = cfg->varinfo [curinst];
1719                 if (inst->opcode != OP_REGVAR) {
1720                         switch (cinfo->args[iParm].regtype) {
1721                                 case RegTypeStructByAddr :
1722                                 if (cinfo->args[iParm].reg == STK_BASE) {
1723                                         inst->opcode       = OP_S390_LOADARG;
1724                                         inst->inst_basereg = frame_reg;
1725                                         size               = abs(cinfo->args[iParm].vtsize);
1726                                         offset             = S390_ALIGN(offset, sizeof(long));
1727                                         inst->inst_offset  = offset;
1728                                         inst->unused       = cinfo->args[iParm].offset;
1729                                 } else {
1730                                         inst->opcode       = OP_S390_ARGREG;
1731                                         inst->inst_basereg = frame_reg;
1732                                         size               = sizeof(gpointer);
1733                                         offset             = S390_ALIGN(offset, size);
1734                                         inst->inst_offset  = offset;
1735                                         inst->unused       = cinfo->args[iParm].offset;
1736                                 }
1737                                         break;
1738                                 case RegTypeStructByVal :
1739                                         inst->opcode       = OP_S390_ARGPTR;
1740                                         inst->inst_basereg = frame_reg;
1741                                         size               = cinfo->args[iParm].size;
1742                                         offset             = S390_ALIGN(offset, size);
1743                                         inst->inst_offset  = offset;
1744                                         inst->unused       = cinfo->args[iParm].offset;
1745                                         break;
1746                                 default :
1747                                 if (cinfo->args[iParm].reg != STK_BASE) {
1748                                         inst->opcode       = OP_REGOFFSET;
1749                                         inst->inst_basereg = frame_reg;
1750                                         size               = (cinfo->args[iParm].size < 8
1751                                                               ? sizeof(long)
1752                                                               : sizeof(long long));
1753                                         offset             = S390_ALIGN(offset, size);
1754                                         inst->inst_offset  = offset;
1755                                 } else {
1756                                         inst->opcode       = OP_S390_STKARG;
1757                                         inst->inst_basereg = frame_reg;
1758                                         size               = (cinfo->args[iParm].size < 4
1759                                                               ? 4 - cinfo->args[iParm].size
1760                                                               : 0);
1761                                         inst->inst_offset  = cinfo->args[iParm].offset +
1762                                                              size;
1763                                         inst->unused       = 0;
1764                                         size               = sizeof(long);
1765                                 }
1766                         }
1767                         if ((sig->call_convention == MONO_CALL_VARARG) &&
1768                             (cinfo->args[iParm].regtype != RegTypeGeneral) &&
1769                             (iParm < sig->sentinelpos))
1770                                 cfg->sig_cookie += size;
1771
1772                         offset += size;
1773                 }
1774                 curinst++;
1775         }
1776
1777         curinst = cfg->locals_start;
1778         for (iVar = curinst; iVar < cfg->num_varinfo; ++iVar) {
1779                 inst = cfg->varinfo [iVar];
1780                 if ((inst->flags & MONO_INST_IS_DEAD) ||
1781                     (inst->opcode == OP_REGVAR))
1782                         continue;
1783
1784                 /*--------------------------------------------------*/
1785                 /* inst->unused indicates native sized value types, */
1786                 /* this is used by the pinvoke wrappers when they   */
1787                 /* call functions returning structure               */
1788                 /*--------------------------------------------------*/
1789                 if (inst->unused && MONO_TYPE_ISSTRUCT (inst->inst_vtype))
1790                         size = mono_class_native_size (mono_class_from_mono_type(inst->inst_vtype), &align);
1791                 else
1792                         size = mono_type_size (inst->inst_vtype, &align);
1793
1794                 offset             = S390_ALIGN(offset, align);
1795                 inst->inst_offset  = offset;
1796                 inst->opcode       = OP_REGOFFSET;
1797                 inst->inst_basereg = frame_reg;
1798                 offset            += size;
1799                 DEBUG (g_print("allocating local %d to %ld\n", iVar, inst->inst_offset));
1800         }
1801
1802         /*------------------------------------------------------*/
1803         /* Allow space for the trace method stack area if needed*/
1804         /*------------------------------------------------------*/
1805         if (mono_jit_trace_calls != NULL && mono_trace_eval (cfg->method)) {
1806                 offset += S390_TRACE_STACK_SIZE;
1807         }
1808
1809         /*------------------------------------------------------*/
1810         /* Reserve space to save LMF and caller saved registers */
1811         /*------------------------------------------------------*/
1812         if (cfg->method->save_lmf)
1813                 offset += sizeof (MonoLMF);
1814
1815         /*------------------------------------------------------*/
1816         /* align the offset                                     */
1817         /*------------------------------------------------------*/
1818         cfg->stack_offset = S390_ALIGN(offset, S390_STACK_ALIGNMENT);
1819
1820 }
1821
1822 /*========================= End of Function ========================*/
1823
1824 /*------------------------------------------------------------------*/
1825 /*                                                                  */
1826 /* Name         - mono_arch_call_opcode                             */
1827 /*                                                                  */
1828 /* Function     - Take the arguments and generate the arch-specific */
1829 /*                instructions to properly call the function. This  */
1830 /*                includes pushing, moving argments to the correct  */
1831 /*                etc.                                              */
1832 /*                                                                  */
1833 /*------------------------------------------------------------------*/
1834
1835 MonoCallInst*
1836 mono_arch_call_opcode (MonoCompile *cfg, MonoBasicBlock* bb,
1837                        MonoCallInst *call, int is_virtual) {
1838         MonoInst *in;
1839         MonoCallArgParm *arg;
1840         MonoMethodSignature *sig;
1841         int i, n, lParamArea;
1842         CallInfo *cinfo;
1843         ArgInfo *ainfo;
1844         size_data sz;
1845         int stackSize;
1846
1847         sig = call->signature;
1848         n = sig->param_count + sig->hasthis;
1849         DEBUG (g_print ("Call requires: %d parameters\n",n));
1850
1851         cinfo = calculate_sizes (sig, &sz, sig->pinvoke);
1852
1853         stackSize         = sz.stack_size + sz.local_size + sz.parm_size + sz.offset;
1854         call->stack_usage = MAX(stackSize, call->stack_usage);
1855         lParamArea        = MAX((call->stack_usage-S390_MINIMAL_STACK_SIZE-sz.parm_size), 0);
1856         cfg->param_area   = MAX(((signed) cfg->param_area), lParamArea);
1857         cfg->flags       |= MONO_CFG_HAS_CALLS;
1858
1859         if (cinfo->struct_ret)
1860                 call->used_iregs |= 1 << cinfo->ret.reg;
1861
1862         for (i = 0; i < n; ++i) {
1863                 ainfo = cinfo->args + i;
1864
1865                 if ((sig->call_convention == MONO_CALL_VARARG) &&
1866                     (i == sig->sentinelpos)) {
1867                         MonoInst *sigArg;
1868
1869                         cfg->disable_aot = TRUE;
1870                         MONO_INST_NEW (cfg, sigArg, OP_ICONST);
1871                         sigArg->inst_p0 = call->signature;
1872
1873                         MONO_INST_NEW_CALL_ARG (cfg, arg, OP_OUTARG_MEMBASE);
1874                         arg->ins.inst_left  = sigArg;
1875                         arg->ins.inst_right = (MonoInst *) call;
1876                         arg->size           = ainfo->size;
1877                         arg->offset         = cinfo->sigCookie.offset;
1878                         call->used_iregs   |= 1 << ainfo->reg;
1879                         arg->ins.next       = call->out_args;
1880                         call->out_args      = (MonoInst *) arg;
1881                 }
1882
1883                 if (is_virtual && i == 0) {
1884                         /* the argument will be attached to the call instrucion */
1885                         in = call->args [i];
1886                         call->used_iregs |= 1 << ainfo->reg;
1887                 } else {
1888                         MONO_INST_NEW_CALL_ARG (cfg, arg, OP_OUTARG);
1889                         in                  = call->args [i];
1890                         arg->ins.cil_code   = in->cil_code;
1891                         arg->ins.inst_left  = in;
1892                         arg->ins.type       = in->type;
1893                         /* prepend, we'll need to reverse them later */
1894                         arg->ins.next       = call->out_args;
1895                         call->out_args      = (MonoInst *) arg;
1896                         arg->ins.inst_right = (MonoInst *) call;
1897                         if (ainfo->regtype == RegTypeGeneral) {
1898                                 arg->ins.unused   = ainfo->reg;
1899                                 call->used_iregs |= 1 << ainfo->reg;
1900                                 if (arg->ins.type == STACK_I8)
1901                                         call->used_iregs |= 1 << (ainfo->reg + 1);
1902                         } else if (ainfo->regtype == RegTypeStructByAddr) {
1903                                 call->used_iregs |= 1 << ainfo->reg;
1904                                 arg->ins.sreg1    = ainfo->reg;
1905                                 arg->ins.opcode   = OP_OUTARG_VT;
1906                                 arg->size         = -ainfo->vtsize;
1907                                 arg->offset       = ainfo->offset;
1908                                 arg->offPrm       = ainfo->offparm + sz.offStruct;
1909                         } else if (ainfo->regtype == RegTypeStructByVal) {
1910                                 if (ainfo->reg != STK_BASE) {
1911                                         switch (ainfo->size) {
1912                                         case 0:
1913                                         case 1:
1914                                         case 2:
1915                                         case 4:
1916                                                 call->used_iregs |= 1 << ainfo->reg;
1917                                                 break;
1918                                         case 8:
1919                                                 call->used_iregs |= 1 << ainfo->reg;
1920                                                 call->used_iregs |= 1 << (ainfo->reg+1);
1921                                                 break;
1922                                         default:
1923                                                 call->used_iregs |= 1 << ainfo->reg;
1924                                         }
1925                                 }
1926                                 arg->ins.sreg1  = ainfo->reg;
1927                                 arg->ins.opcode = OP_OUTARG_VT;
1928                                 arg->size       = ainfo->size;
1929                                 arg->offset     = ainfo->offset;
1930                                 arg->offPrm     = ainfo->offparm + sz.offStruct;
1931                         } else if (ainfo->regtype == RegTypeBase) {
1932                                 arg->ins.opcode   = OP_OUTARG_MEMBASE;
1933                                 arg->ins.sreg1    = ainfo->reg;
1934                                 arg->size         = ainfo->size;
1935                                 arg->offset       = ainfo->offset;
1936                                 call->used_iregs |= 1 << ainfo->reg;
1937                         } else if (ainfo->regtype == RegTypeFP) {
1938                                 arg->ins.unused   = ainfo->reg;
1939                                 call->used_fregs |= 1 << ainfo->reg;
1940                                 if (ainfo->size == 4)
1941                                         arg->ins.opcode = OP_OUTARG_R4;
1942                                 else
1943                                         arg->ins.opcode = OP_OUTARG_R8;
1944                         } else {
1945                                 g_assert_not_reached ();
1946                         }
1947                 }
1948         }
1949         /*
1950          * Reverse the call->out_args list.
1951          */
1952         {
1953                 MonoInst *prev = NULL, *list = call->out_args, *next;
1954                 while (list) {
1955                         next = list->next;
1956                         list->next = prev;
1957                         prev = list;
1958                         list = next;
1959                 }
1960                 call->out_args = prev;
1961         }
1962
1963         g_free (cinfo);
1964         return call;
1965 }
1966
1967 /*========================= End of Function ========================*/
1968
1969 /*------------------------------------------------------------------*/
1970 /*                                                                  */
1971 /* Name         - mono_arch_instrument_mem_needs                    */
1972 /*                                                                  */
1973 /* Function     - Allow tracing to work with this interface (with   */
1974 /*                an optional argument).                            */
1975 /*                                                                  */
1976 /*------------------------------------------------------------------*/
1977
1978 void
1979 mono_arch_instrument_mem_needs (MonoMethod *method, int *stack, int *code)
1980 {
1981         /* no stack room needed now (may be needed for FASTCALL-trace support) */
1982         *stack = 0;
1983         /* split prolog-epilog requirements? */
1984         *code = 50; /* max bytes needed: check this number */
1985 }
1986
1987 /*========================= End of Function ========================*/
1988
1989 /*------------------------------------------------------------------*/
1990 /*                                                                  */
1991 /* Name         - mono_arch_instrument_prolog                       */
1992 /*                                                                  */
1993 /* Function     - Create an "instrumented" prolog.                  */
1994 /*                                                                  */
1995 /*------------------------------------------------------------------*/
1996
1997 void*
1998 mono_arch_instrument_prolog (MonoCompile *cfg, void *func, void *p,
1999                              gboolean enable_arguments)
2000 {
2001         guchar  *code = p;
2002         int     parmOffset,
2003                 fpOffset,
2004                 baseReg;
2005
2006         parmOffset = cfg->stack_usage - S390_TRACE_STACK_SIZE;
2007         if (cfg->method->save_lmf)
2008                 parmOffset -= sizeof(MonoLMF);
2009         fpOffset   = parmOffset + (5*sizeof(gint32));
2010         if (fpOffset > 4096) {
2011                 s390_lr (code, s390_r12, STK_BASE);
2012                 baseReg = s390_r12;
2013                 while (fpOffset > 4096) {
2014                         s390_ahi (code, baseReg, 4096);
2015                         fpOffset   -= 4096;
2016                         parmOffset -= 4096;
2017                 }
2018         } else {
2019                 baseReg = STK_BASE;
2020         }
2021
2022         s390_stm  (code, s390_r2, s390_r6, baseReg, parmOffset);
2023         s390_std  (code, s390_f0, 0, baseReg, fpOffset);
2024         s390_std  (code, s390_f1, 0, baseReg, fpOffset+sizeof(gdouble));
2025         s390_std  (code, s390_f2, 0, baseReg, fpOffset+2*sizeof(gdouble));
2026         s390_basr (code, s390_r13, 0);
2027         s390_j    (code, 6);
2028         s390_word (code, cfg->method);
2029         s390_word (code, func);
2030         s390_l    (code, s390_r2, 0, s390_r13, 4);
2031         s390_la   (code, s390_r3, 0, baseReg, parmOffset);
2032         s390_lr   (code, s390_r4, STK_BASE);
2033         s390_ahi  (code, s390_r4, cfg->stack_usage);
2034         s390_l    (code, s390_r1, 0, s390_r13, 8);
2035         s390_basr (code, s390_r14, s390_r1);
2036         s390_ld   (code, s390_f2, 0, baseReg, fpOffset+2*sizeof(gdouble));
2037         s390_ld   (code, s390_f1, 0, baseReg, fpOffset+sizeof(gdouble));
2038         s390_ld   (code, s390_f0, 0, baseReg, fpOffset);
2039         s390_lm   (code, s390_r2, s390_r6, baseReg, parmOffset);
2040
2041         return code;
2042 }
2043
2044 /*========================= End of Function ========================*/
2045
2046 /*------------------------------------------------------------------*/
2047 /*                                                                  */
2048 /* Name         - mono_arch_instrument_epilog                       */
2049 /*                                                                  */
2050 /* Function     - Create an epilog that will handle the returned    */
2051 /*                values used in instrumentation.                   */
2052 /*                                                                  */
2053 /*------------------------------------------------------------------*/
2054
2055 void*
2056 mono_arch_instrument_epilog (MonoCompile *cfg, void *func, void *p, gboolean enable_arguments)
2057 {
2058         guchar     *code = p;
2059         int        save_mode = SAVE_NONE,
2060                    saveOffset;
2061         MonoMethod *method = cfg->method;
2062         int        rtype = mono_type_get_underlying_type (mono_method_signature (method)->ret)->type;
2063
2064         saveOffset = cfg->stack_usage - S390_TRACE_STACK_SIZE;
2065         if (method->save_lmf)
2066                 saveOffset -= sizeof(MonoLMF);
2067
2068 handle_enum:
2069         switch (rtype) {
2070         case MONO_TYPE_VOID:
2071                 /* special case string .ctor icall */
2072                 if (strcmp (".ctor", method->name) && method->klass == mono_defaults.string_class)
2073                         save_mode = SAVE_ONE;
2074                 else
2075                         save_mode = SAVE_NONE;
2076                 break;
2077         case MONO_TYPE_I8:
2078         case MONO_TYPE_U8:
2079                 save_mode = SAVE_TWO;
2080                 break;
2081         case MONO_TYPE_R4:
2082                 save_mode = SAVE_R4;
2083                 break;
2084         case MONO_TYPE_R8:
2085                 save_mode = SAVE_R8;
2086                 break;
2087         case MONO_TYPE_VALUETYPE:
2088                 if (mono_method_signature (method)->ret->data.klass->enumtype) {
2089                         rtype = mono_method_signature (method)->ret->data.klass->enum_basetype->type;
2090                         goto handle_enum;
2091                 }
2092                 save_mode = SAVE_STRUCT;
2093                 break;
2094         default:
2095                 save_mode = SAVE_ONE;
2096                 break;
2097         }
2098
2099         switch (save_mode) {
2100         case SAVE_TWO:
2101                 s390_stm (code, s390_r2, s390_r3, cfg->frame_reg, saveOffset);
2102                 if (enable_arguments) {
2103                         s390_lr (code, s390_r4, s390_r3);
2104                         s390_lr (code, s390_r3, s390_r2);
2105                 }
2106                 break;
2107         case SAVE_ONE:
2108                 s390_st (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2109                 if (enable_arguments) {
2110                         s390_lr (code, s390_r3, s390_r2);
2111                 }
2112                 break;
2113         case SAVE_R4:
2114                 s390_std (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2115                 if (enable_arguments) {
2116                         s390_ldebr (code, s390_f0, s390_f0);
2117                 }
2118                 break;
2119         case SAVE_R8:
2120                 s390_std (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2121                 break;
2122         case SAVE_STRUCT:
2123                 s390_st (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2124                 if (enable_arguments) {
2125                         s390_l (code, s390_r3, 0, cfg->frame_reg,
2126                                 S390_MINIMAL_STACK_SIZE+cfg->param_area);
2127                 }
2128                 break;
2129         case SAVE_NONE:
2130         default:
2131                 break;
2132         }
2133
2134         s390_basr (code, s390_r13, 0);
2135         s390_j    (code, 6);
2136         s390_word (code, cfg->method);
2137         s390_word (code, func);
2138         s390_l    (code, s390_r2, 0, s390_r13, 4);
2139         s390_l    (code, s390_r1, 0, s390_r13, 8);
2140         s390_basr (code, s390_r14, s390_r1);
2141
2142         switch (save_mode) {
2143         case SAVE_TWO:
2144                 s390_lm  (code, s390_r2, s390_r3, cfg->frame_reg, saveOffset);
2145                 break;
2146         case SAVE_ONE:
2147                 s390_l   (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2148                 break;
2149         case SAVE_R4:
2150         case SAVE_R8:
2151                 s390_ld  (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2152                 break;
2153         case SAVE_STRUCT:
2154                 s390_l   (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2155                 break;
2156         case SAVE_NONE:
2157         default:
2158                 break;
2159         }
2160
2161         return code;
2162 }
2163
2164 /*========================= End of Function ========================*/
2165
2166 /*------------------------------------------------------------------*/
2167 /*                                                                  */
2168 /* Name         - peephole_pass                                     */
2169 /*                                                                  */
2170 /* Function     - Form a peephole pass at the code looking for      */
2171 /*                simple optimizations.                             */
2172 /*                                                                  */
2173 /*------------------------------------------------------------------*/
2174
2175 static void
2176 peephole_pass (MonoCompile *cfg, MonoBasicBlock *bb)
2177 {
2178         MonoInst *ins, *last_ins = NULL;
2179         ins = bb->code;
2180
2181         while (ins) {
2182
2183                 switch (ins->opcode) {
2184                 case OP_MUL_IMM:
2185                         /* remove unnecessary multiplication with 1 */
2186                         if (ins->inst_imm == 1) {
2187                                 if (ins->dreg != ins->sreg1) {
2188                                         ins->opcode = OP_MOVE;
2189                                 } else {
2190                                         last_ins->next = ins->next;
2191                                         ins = ins->next;
2192                                         continue;
2193                                 }
2194                         }
2195                         break;
2196                 case OP_LOAD_MEMBASE:
2197                 case OP_LOADI4_MEMBASE:
2198                         /*
2199                          * OP_STORE_MEMBASE_REG reg, offset(basereg)
2200                          * OP_LOAD_MEMBASE offset(basereg), reg
2201                          */
2202                         if (last_ins && (last_ins->opcode == OP_STOREI4_MEMBASE_REG
2203                                          || last_ins->opcode == OP_STORE_MEMBASE_REG) &&
2204                             ins->inst_basereg == last_ins->inst_destbasereg &&
2205                             ins->inst_offset == last_ins->inst_offset) {
2206                                 if (ins->dreg == last_ins->sreg1) {
2207                                         last_ins->next = ins->next;
2208                                         ins = ins->next;
2209                                         continue;
2210                                 } else {
2211                                         ins->opcode = OP_MOVE;
2212                                         ins->sreg1 = last_ins->sreg1;
2213                                 }
2214
2215                         /*
2216                          * Note: reg1 must be different from the basereg in the second load
2217                          * OP_LOAD_MEMBASE offset(basereg), reg1
2218                          * OP_LOAD_MEMBASE offset(basereg), reg2
2219                          * -->
2220                          * OP_LOAD_MEMBASE offset(basereg), reg1
2221                          * OP_MOVE reg1, reg2
2222                          */
2223                         } if (last_ins && (last_ins->opcode == OP_LOADI4_MEMBASE
2224                                            || last_ins->opcode == OP_LOAD_MEMBASE) &&
2225                               ins->inst_basereg != last_ins->dreg &&
2226                               ins->inst_basereg == last_ins->inst_basereg &&
2227                               ins->inst_offset == last_ins->inst_offset) {
2228
2229                                 if (ins->dreg == last_ins->dreg) {
2230                                         last_ins->next = ins->next;
2231                                         ins = ins->next;
2232                                         continue;
2233                                 } else {
2234                                         ins->opcode = OP_MOVE;
2235                                         ins->sreg1 = last_ins->dreg;
2236                                 }
2237
2238                                 //g_assert_not_reached ();
2239
2240 #if 0
2241                         /*
2242                          * OP_STORE_MEMBASE_IMM imm, offset(basereg)
2243                          * OP_LOAD_MEMBASE offset(basereg), reg
2244                          * -->
2245                          * OP_STORE_MEMBASE_IMM imm, offset(basereg)
2246                          * OP_ICONST reg, imm
2247                          */
2248                         } else if (last_ins && (last_ins->opcode == OP_STOREI4_MEMBASE_IMM
2249                                                 || last_ins->opcode == OP_STORE_MEMBASE_IMM) &&
2250                                    ins->inst_basereg == last_ins->inst_destbasereg &&
2251                                    ins->inst_offset == last_ins->inst_offset) {
2252                                 //static int c = 0; printf ("MATCHX %s %d\n", cfg->method->name,c++);
2253                                 ins->opcode = OP_ICONST;
2254                                 ins->inst_c0 = last_ins->inst_imm;
2255                                 g_assert_not_reached (); // check this rule
2256 #endif
2257                         }
2258                         break;
2259                 case OP_LOADU1_MEMBASE:
2260                 case OP_LOADI1_MEMBASE:
2261                         if (last_ins && (last_ins->opcode == OP_STOREI1_MEMBASE_REG) &&
2262                                         ins->inst_basereg == last_ins->inst_destbasereg &&
2263                                         ins->inst_offset == last_ins->inst_offset) {
2264                                 if (ins->dreg == last_ins->sreg1) {
2265                                         last_ins->next = ins->next;
2266                                         ins = ins->next;
2267                                         continue;
2268                                 } else {
2269                                         //static int c = 0; printf ("MATCHX %s %d\n", cfg->method->name,c++);
2270                                         ins->opcode = OP_MOVE;
2271                                         ins->sreg1 = last_ins->sreg1;
2272                                 }
2273                         }
2274                         break;
2275                 case OP_LOADU2_MEMBASE:
2276                 case OP_LOADI2_MEMBASE:
2277                         if (last_ins && (last_ins->opcode == OP_STOREI2_MEMBASE_REG) &&
2278                                         ins->inst_basereg == last_ins->inst_destbasereg &&
2279                                         ins->inst_offset == last_ins->inst_offset) {
2280                                 if (ins->dreg == last_ins->sreg1) {
2281                                         last_ins->next = ins->next;
2282                                         ins = ins->next;
2283                                         continue;
2284                                 } else {
2285                                         ins->opcode = OP_MOVE;
2286                                         ins->sreg1 = last_ins->sreg1;
2287                                 }
2288                         }
2289                         break;
2290                 case CEE_CONV_I4:
2291                 case CEE_CONV_U4:
2292                 case OP_MOVE:
2293                         /*
2294                          * OP_MOVE reg, reg
2295                          */
2296                         if (ins->dreg == ins->sreg1) {
2297                                 if (last_ins)
2298                                         last_ins->next = ins->next;
2299                                 ins = ins->next;
2300                                 continue;
2301                         }
2302                         /*
2303                          * OP_MOVE sreg, dreg
2304                          * OP_MOVE dreg, sreg
2305                          */
2306                         if (last_ins && last_ins->opcode == OP_MOVE &&
2307                             ins->sreg1 == last_ins->dreg &&
2308                             ins->dreg == last_ins->sreg1) {
2309                                 last_ins->next = ins->next;
2310                                 ins = ins->next;
2311                                 continue;
2312                         }
2313                         break;
2314                 }
2315                 last_ins = ins;
2316                 ins = ins->next;
2317         }
2318         bb->last_ins = last_ins;
2319 }
2320
2321 /*========================= End of Function ========================*/
2322
2323 /*------------------------------------------------------------------*/
2324 /*                                                                  */
2325 /* Name         - mono_arch_local_regalloc.                         */
2326 /*                                                                  */
2327 /* Function     - We first scan the list of instructions and we     */
2328 /*                save the liveness information of each register    */
2329 /*                (when the register is first used, when its value  */
2330 /*                is set etc.). We also reverse the list of instr-  */
2331 /*                uctions (in the InstList list) because assigning  */
2332 /*                registers backwards allows for more tricks to be  */
2333 /*                used.                                             */
2334 /*                                                                  */
2335 /*------------------------------------------------------------------*/
2336
2337 void
2338 mono_arch_local_regalloc (MonoCompile *cfg, MonoBasicBlock *bb)
2339 {
2340         mono_local_regalloc(cfg, bb);
2341 }
2342
2343 /*========================= End of Function ========================*/
2344
2345 /*------------------------------------------------------------------*/
2346 /*                                                                  */
2347 /* Name         - emit_float_to_int                                 */
2348 /*                                                                  */
2349 /* Function     - Create instructions which will convert a floating */
2350 /*                point value to integer.                           */
2351 /*                                                                  */
2352 /*------------------------------------------------------------------*/
2353
2354 static guchar*
2355 emit_float_to_int (MonoCompile *cfg, guchar *code, int dreg, int sreg, int size, gboolean is_signed)
2356 {
2357         /* sreg is a float, dreg is an integer reg. */
2358         if (is_signed) {
2359                 s390_cfdbr (code, dreg, 5, sreg);
2360                 switch (size) {
2361                         case 1:
2362                                 s390_lhi  (code, s390_r0, 0);
2363                                 s390_lhi  (code, s390_r13, 0xff);
2364                                 s390_ltr  (code, dreg, dreg);
2365                                 s390_jnl  (code, 4);
2366                                 s390_lhi  (code, s390_r0, 0x80);
2367                                 s390_nr   (code, dreg, s390_r13);
2368                                 s390_or   (code, dreg, s390_r0);
2369                                 break;
2370                 }
2371         } else {
2372                 short *o[1];
2373                 s390_basr   (code, s390_r13, 0);
2374                 s390_j      (code, 10);
2375                 s390_llong  (code, 0x41e0000000000000);
2376                 s390_llong  (code, 0x41f0000000000000);
2377                 s390_ldr    (code, s390_f15, sreg);
2378                 s390_cdb    (code, s390_f15, 0, s390_r13, 4);
2379                 s390_jl     (code, 0); CODEPTR(code, o[0]);
2380                 s390_sdb    (code, s390_f15, 0, s390_r13, 12);
2381                 s390_cfdbr  (code, dreg, 7, s390_f15);
2382                 s390_j      (code, 4);
2383                 PTRSLOT(code, o[0]);
2384                 s390_cfdbr  (code, dreg, 5, sreg);
2385                 switch (size) {
2386                         case 1:
2387                                 s390_lhi  (code, s390_r0, 0xff);
2388                                 s390_nr   (code, dreg, s390_r0);
2389                                 break;
2390                         case 2:
2391                                 s390_lhi  (code, s390_r0, -1);
2392                                 s390_srl  (code, s390_r0, 0, 16);
2393                                 s390_nr   (code, dreg, s390_r0);
2394                                 break;
2395                 }
2396         }
2397         return code;
2398 }
2399
2400 /*========================= End of Function ========================*/
2401
2402 /*------------------------------------------------------------------*/
2403 /*                                                                  */
2404 /* Name         - mono_arch_output_basic_block                      */
2405 /*                                                                  */
2406 /* Function     - Perform the "real" work of emitting instructions  */
2407 /*                that will do the work of in the basic block.      */
2408 /*                                                                  */
2409 /*------------------------------------------------------------------*/
2410
2411 void
2412 mono_arch_output_basic_block (MonoCompile *cfg, MonoBasicBlock *bb)
2413 {
2414         MonoInst *ins;
2415         MonoCallInst *call;
2416         guint offset;
2417         guint8 *code = cfg->native_code + cfg->code_len;
2418         MonoInst *last_ins = NULL;
2419         guint last_offset = 0;
2420         int max_len, cpos, src2;
2421
2422         if (cfg->opt & MONO_OPT_PEEPHOLE)
2423                 peephole_pass (cfg, bb);
2424
2425         /* we don't align basic blocks of loops on s390 */
2426
2427         if (cfg->verbose_level > 2)
2428                 g_print ("Basic block %d starting at offset 0x%x\n", bb->block_num, bb->native_offset);
2429
2430         cpos = bb->max_offset;
2431
2432         if (cfg->prof_options & MONO_PROFILE_COVERAGE) {
2433                 //MonoCoverageInfo *cov = mono_get_coverage_info (cfg->method);
2434                 //g_assert (!mono_compile_aot);
2435                 //cpos += 6;
2436                 //if (bb->cil_code)
2437                 //      cov->data [bb->dfn].iloffset = bb->cil_code - cfg->cil_code;
2438                 /* this is not thread save, but good enough */
2439                 /* fixme: howto handle overflows? */
2440                 //x86_inc_mem (code, &cov->data [bb->dfn].count);
2441         }
2442
2443         ins = bb->code;
2444         while (ins) {
2445                 offset = code - cfg->native_code;
2446
2447                 max_len = ((guint8 *)ins_spec [ins->opcode])[MONO_INST_LEN];
2448
2449                 if (offset > (cfg->code_size - max_len - 16)) {
2450                         cfg->code_size *= 2;
2451                         cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
2452                         code = cfg->native_code + offset;
2453                 }
2454
2455                 mono_debug_record_line_number (cfg, ins, offset);
2456
2457                 switch (ins->opcode) {
2458                 case OP_STOREI1_MEMBASE_IMM: {
2459                         s390_lhi (code, s390_r0, ins->inst_imm);
2460                         if (s390_is_uimm12(ins->inst_offset))
2461                                 s390_stc (code, s390_r0, 0, ins->inst_destbasereg, ins->inst_offset);
2462                         else {
2463                                 s390_basr (code, s390_r13, 0);
2464                                 s390_j    (code, 4);
2465                                 s390_word (code, ins->inst_offset);
2466                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2467                                 s390_stc  (code, s390_r0, s390_r13, ins->inst_destbasereg, 0);
2468                         }
2469                 }
2470                         break;
2471                 case OP_STOREI2_MEMBASE_IMM: {
2472                         s390_lhi (code, s390_r0, ins->inst_imm);
2473                         if (s390_is_uimm12(ins->inst_offset)) {
2474                                 s390_sth (code, s390_r0, 0, ins->inst_destbasereg, ins->inst_offset);
2475                         } else {
2476                                 s390_basr (code, s390_r13, 0);
2477                                 s390_j    (code, 4);
2478                                 s390_word (code, ins->inst_offset);
2479                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2480                                 s390_sth  (code, s390_r0, s390_r13, ins->inst_destbasereg, 0);
2481                         }
2482                 }
2483                         break;
2484                 case OP_STORE_MEMBASE_IMM:
2485                 case OP_STOREI4_MEMBASE_IMM: {
2486                         if (s390_is_imm16(ins->inst_imm)) {
2487                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2488                         } else {
2489                                 s390_basr (code, s390_r13, 0);
2490                                 s390_j    (code, 4);
2491                                 s390_word (code, ins->inst_imm);
2492                                 s390_l    (code, s390_r0, 0, s390_r13, 4);
2493                         }
2494                         if (s390_is_uimm12(ins->inst_offset)) {
2495                                 s390_st  (code, s390_r0, 0, ins->inst_destbasereg, ins->inst_offset);
2496                         } else {
2497                                 s390_basr (code, s390_r13, 0);
2498                                 s390_j    (code, 4);
2499                                 s390_word (code, ins->inst_offset);
2500                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2501                                 s390_st   (code, s390_r0, s390_r13, ins->inst_destbasereg, 0);
2502                         }
2503                 }
2504                         break;
2505                 case OP_STOREI1_MEMBASE_REG: {
2506                         if (s390_is_uimm12(ins->inst_offset)) {
2507                                 s390_stc  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
2508                         } else {
2509                                 s390_basr (code, s390_r13, 0);
2510                                 s390_j    (code, 4);
2511                                 s390_word (code, ins->inst_offset);
2512                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2513                                 s390_stc  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
2514                         }
2515                 }
2516                         break;
2517                 case OP_STOREI2_MEMBASE_REG: {
2518                         if (s390_is_uimm12(ins->inst_offset)) {
2519                                 s390_sth  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
2520                         } else {
2521                                 s390_basr (code, s390_r13, 0);
2522                                 s390_j    (code, 4);
2523                                 s390_word (code, ins->inst_offset);
2524                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2525                                 s390_sth  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
2526                         }
2527                 }
2528                         break;
2529                 case OP_STORE_MEMBASE_REG:
2530                 case OP_STOREI4_MEMBASE_REG: {
2531                         if (s390_is_uimm12(ins->inst_offset)) {
2532                                 s390_st   (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
2533                         } else {
2534                                 s390_basr (code, s390_r13, 0);
2535                                 s390_j    (code, 4);
2536                                 s390_word (code, ins->inst_offset);
2537                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2538                                 s390_st   (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
2539                         }
2540                 }
2541                         break;
2542                 case CEE_LDIND_I:
2543                 case CEE_LDIND_I4:
2544                 case CEE_LDIND_U4: {
2545                         s390_basr (code, s390_r13, 0);
2546                         s390_j    (code, 4);
2547                         s390_word (code, ins->inst_p0);
2548                         s390_l    (code, s390_r13, 0, s390_r13, 4);
2549                         s390_l    (code, ins->dreg, 0, s390_r13, 0);
2550                 }
2551                         break;
2552                 case OP_LOADU4_MEM:
2553                         g_assert_not_reached ();
2554                         break;
2555                 case OP_LOAD_MEMBASE:
2556                 case OP_LOADI4_MEMBASE:
2557                 case OP_LOADU4_MEMBASE: {
2558                         if (s390_is_uimm12(ins->inst_offset))
2559                                 s390_l    (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
2560                         else {
2561                                 if (s390_is_imm16(ins->inst_offset)) {
2562                                         s390_lhi (code, s390_r13, ins->inst_offset);
2563                                         s390_l   (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
2564                                 } else {
2565                                         s390_basr (code, s390_r13, 0);
2566                                         s390_j    (code, 4);
2567                                         s390_word (code, ins->inst_offset);
2568                                         s390_l    (code, s390_r13, 0, s390_r13, 4);
2569                                         s390_l    (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
2570                                 }
2571                         }
2572                 }
2573                         break;
2574                 case OP_LOADU1_MEMBASE: {
2575                         s390_lhi (code, s390_r0, 0);
2576                         if (s390_is_uimm12(ins->inst_offset))
2577                                 s390_ic   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
2578                         else {
2579                                 s390_basr (code, s390_r13, 0);
2580                                 s390_j    (code, 4);
2581                                 s390_word (code, ins->inst_offset);
2582                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2583                                 s390_ic   (code, s390_r0, s390_r13, ins->inst_basereg, 0);
2584                         }
2585                         s390_lr   (code, ins->dreg, s390_r0);
2586                 }
2587                         break;
2588                 case OP_LOADI1_MEMBASE: {
2589                         s390_lhi (code, s390_r0, 0);
2590                         if (s390_is_uimm12(ins->inst_offset))
2591                                 s390_ic   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
2592                         else {
2593                                 s390_basr (code, s390_r13, 0);
2594                                 s390_j    (code, 4);
2595                                 s390_word (code, ins->inst_offset);
2596                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2597                                 s390_ic   (code, s390_r0, s390_r13, ins->inst_basereg, 0);
2598                         }
2599                         s390_lhi  (code, s390_r13, 0x80);
2600                         s390_nr   (code, s390_r13, s390_r0);
2601                         s390_jz   (code, 5);
2602                         s390_lhi  (code, s390_r13, 0xff00);
2603                         s390_or   (code, s390_r0, s390_r13);
2604                         s390_lr   (code, ins->dreg, s390_r0);
2605                 }
2606                         break;
2607                 case OP_LOADU2_MEMBASE: {
2608                         s390_lhi (code, s390_r0, 0);
2609                         if (s390_is_uimm12(ins->inst_offset))
2610                                 s390_icm  (code, s390_r0, 3, ins->inst_basereg, ins->inst_offset);
2611                         else {
2612                                 s390_basr (code, s390_r13, 0);
2613                                 s390_j    (code, 4);
2614                                 s390_word (code, ins->inst_offset);
2615                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2616                                 s390_ar   (code, s390_r13, ins->inst_basereg);
2617                                 s390_icm  (code, s390_r0, 3, s390_r13, 0);
2618                         }
2619                         s390_lr  (code, ins->dreg, s390_r0);
2620                 }
2621                         break;
2622                 case OP_LOADI2_MEMBASE: {
2623                         s390_lhi (code, s390_r0, 0);
2624                         if (s390_is_uimm12(ins->inst_offset))
2625                                 s390_lh   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
2626                         else {
2627                                 s390_basr (code, s390_r13, 0);
2628                                 s390_j    (code, 4);
2629                                 s390_word (code, ins->inst_offset);
2630                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2631                                 s390_lh   (code, s390_r0, s390_r13, ins->inst_basereg, 0);
2632                         }
2633                         s390_lr  (code, ins->dreg, s390_r0);
2634                 }
2635                         break;
2636                 case CEE_CONV_I1: {
2637                         s390_lhi  (code, s390_r0, 0x80);
2638                         if (ins->dreg != ins->sreg1) {
2639                                 s390_lr   (code, ins->dreg, ins->sreg1);
2640                         }
2641                         s390_nr   (code, s390_r0, ins->sreg1);
2642                         s390_jz   (code, 7);
2643                         s390_lhi  (code, s390_r13, -1);
2644                         s390_sll  (code, s390_r13, 0, 8);
2645                         s390_or   (code, ins->dreg, s390_r13);
2646                 }
2647                         break;
2648                 case CEE_CONV_I2: {
2649                         s390_lhi  (code, s390_r0, 0x80);
2650                         s390_sll  (code, s390_r0, 0, 8);
2651                         if (ins->dreg != ins->sreg1) {
2652                                 s390_lr   (code, ins->dreg, ins->sreg1);
2653                         }
2654                         s390_nr   (code, s390_r0, ins->sreg1);
2655                         s390_jz   (code, 7);
2656                         s390_lhi  (code, s390_r13, -1);
2657                         s390_sll  (code, s390_r13, 0, 16);
2658                         s390_or   (code, ins->dreg, s390_r13);
2659                 }
2660                         break;
2661                 case CEE_CONV_U1: {
2662                         s390_lhi  (code, s390_r0, 0xff);
2663                         if (ins->dreg != ins->sreg1) {
2664                                 s390_lr   (code, ins->dreg, ins->sreg1);
2665                         }
2666                         s390_nr   (code, ins->dreg, s390_r0);
2667                 }
2668                         break;
2669                 case CEE_CONV_U2: {
2670                         s390_lhi  (code, s390_r0, -1);
2671                         s390_sll  (code, s390_r0, 0, 16);
2672                         s390_srl  (code, s390_r0, 0, 16);
2673                         if (ins->dreg != ins->sreg1) {
2674                                 s390_lr   (code, ins->dreg, ins->sreg1);
2675                         }
2676                         s390_nr   (code, ins->dreg, s390_r0);
2677                 }
2678                         break;
2679                 case OP_COMPARE: {
2680                         if ((ins->next) &&
2681                             (((ins->next->opcode >= CEE_BNE_UN) &&
2682                               (ins->next->opcode <= CEE_BLT_UN)) ||
2683                              ((ins->next->opcode >= OP_COND_EXC_NE_UN) &&
2684                               (ins->next->opcode <= OP_COND_EXC_LT_UN)) ||
2685                              ((ins->next->opcode == OP_CLT_UN) ||
2686                               (ins->next->opcode == OP_CGT_UN))))
2687                                 s390_clr  (code, ins->sreg1, ins->sreg2);
2688                         else
2689                                 s390_cr   (code, ins->sreg1, ins->sreg2);
2690                 }
2691                         break;
2692                 case OP_COMPARE_IMM: {
2693                         if (s390_is_imm16 (ins->inst_imm)) {
2694                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2695                                 if ((ins->next) &&
2696                                     (((ins->next->opcode >= CEE_BNE_UN) &&
2697                                       (ins->next->opcode <= CEE_BLT_UN)) ||
2698                                      ((ins->next->opcode >= OP_COND_EXC_NE_UN) &&
2699                                       (ins->next->opcode <= OP_COND_EXC_LT_UN)) ||
2700                                      ((ins->next->opcode == OP_CLT_UN) ||
2701                                       (ins->next->opcode == OP_CGT_UN))))
2702                                         s390_clr  (code, ins->sreg1, s390_r0);
2703                                 else
2704                                         s390_cr   (code, ins->sreg1, s390_r0);
2705                         }
2706                         else {
2707                                 s390_basr (code, s390_r13, 0);
2708                                 s390_j    (code, 4);
2709                                 s390_word (code, ins->inst_imm);
2710                                 if ((ins->next) &&
2711                                     (((ins->next->opcode >= CEE_BNE_UN) &&
2712                                       (ins->next->opcode <= CEE_BLT_UN)) ||
2713                                      ((ins->next->opcode >= OP_COND_EXC_NE_UN) &&
2714                                       (ins->next->opcode <= OP_COND_EXC_LT_UN)) ||
2715                                      ((ins->next->opcode == OP_CLT_UN) ||
2716                                       (ins->next->opcode == OP_CGT_UN))))
2717                                         s390_cl   (code, ins->sreg1, 0, s390_r13, 4);
2718                                 else
2719                                         s390_c    (code, ins->sreg1, 0, s390_r13, 4);
2720                         }
2721                 }
2722                         break;
2723                 case OP_X86_TEST_NULL: {
2724                         s390_ltr (code, ins->sreg1, ins->sreg1);
2725                 }
2726                         break;
2727                 case CEE_BREAK: {
2728                         mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS, mono_arch_break);
2729                         s390_brasl (code, s390_r14, 0);
2730                 }
2731                         break;
2732                 case OP_ADDCC: {
2733                         CHECK_SRCDST_COM;
2734                         s390_alr  (code, ins->dreg, src2);
2735                 }
2736                         break;
2737                 case CEE_ADD: {
2738                         CHECK_SRCDST_COM;
2739                         s390_ar   (code, ins->dreg, src2);
2740                 }
2741                         break;
2742                 case OP_ADC: {
2743                         CHECK_SRCDST_COM;
2744                         s390_alcr (code, ins->dreg, src2);
2745                 }
2746                         break;
2747                 case OP_ADD_IMM: {
2748                         if (ins->dreg != ins->sreg1) {
2749                                 s390_lr   (code, ins->dreg, ins->sreg1);
2750                         }
2751                         if ((ins->next) &&
2752                             (ins->next->opcode == OP_ADC_IMM)) {
2753                                 s390_basr (code, s390_r13, 0);
2754                                 s390_j    (code, 4);
2755                                 s390_word (code, ins->inst_imm);
2756                                 s390_a (code, ins->dreg, 0, s390_r13, 4);
2757                         } else {
2758                                 if (s390_is_imm16 (ins->inst_imm)) {
2759                                         s390_ahi  (code, ins->dreg, ins->inst_imm);
2760                                 } else {
2761                                         s390_basr (code, s390_r13, 0);
2762                                         s390_j    (code, 4);
2763                                         s390_word (code, ins->inst_imm);
2764                                         s390_a (code, ins->dreg, 0, s390_r13, 4);
2765                                 }
2766                         }
2767                 }
2768                         break;
2769                 case OP_ADDCC_IMM: {
2770                         if ((ins->next) &&
2771                             (ins->next->opcode == OP_ADC_IMM)) {
2772                                 s390_basr (code, s390_r13, 0);
2773                                 s390_j    (code, 4);
2774                                 s390_word (code, ins->inst_imm);
2775                                 if (ins->dreg != ins->sreg1) {
2776                                         s390_lr   (code, ins->dreg, ins->sreg1);
2777                                 }
2778                                 s390_al   (code, ins->dreg, 0, s390_r13, 4);
2779                         } else {
2780                                 if (s390_is_imm16 (ins->inst_imm)) {
2781                                         if (ins->dreg != ins->sreg1) {
2782                                                 s390_lr   (code, ins->dreg, ins->sreg1);
2783                                         }
2784                                         s390_lhi  (code, s390_r0, ins->inst_imm);
2785                                         s390_alcr (code, ins->dreg, s390_r0);
2786                                 } else {
2787                                         s390_basr (code, s390_r13, 0);
2788                                         s390_j    (code, 4);
2789                                         s390_word (code, ins->inst_imm);
2790                                         if (ins->dreg != ins->sreg1) {
2791                                                 s390_lr   (code, ins->dreg, ins->sreg1);
2792                                         }
2793                                         s390_al   (code, ins->dreg, 0, s390_r13, 4);
2794                                 }
2795                         }
2796                 }
2797                         break;
2798                 case OP_ADC_IMM: {
2799                         if (s390_is_imm16 (ins->inst_imm)) {
2800                                 if (ins->dreg != ins->sreg1) {
2801                                         s390_lr   (code, ins->dreg, ins->sreg1);
2802                                 }
2803                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2804                                 s390_alcr (code, ins->dreg, s390_r0);
2805                         } else {
2806                                 s390_basr (code, s390_r13, 0);
2807                                 s390_j    (code, 4);
2808                                 s390_word (code, ins->inst_imm);
2809                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2810                                 s390_alcr (code, ins->dreg, s390_r13);
2811                         }
2812                 }
2813                         break;
2814                 case CEE_ADD_OVF: {
2815                         CHECK_SRCDST_COM;
2816                         s390_ar   (code, ins->dreg, src2);
2817                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2818                 }
2819                         break;
2820                 case CEE_ADD_OVF_UN: {
2821                         CHECK_SRCDST_COM;
2822                         s390_alr  (code, ins->dreg, src2);
2823                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
2824                 }
2825                         break;
2826                 case OP_LADD: {
2827                         short int *o[1];
2828                         s390_alr  (code, s390_r0, ins->sreg1);
2829                         s390_jnc  (code, 4);
2830                         s390_ahi  (code, s390_r1, 1);
2831                         s390_ar   (code, s390_r1, ins->sreg2);
2832                         s390_lr   (code, ins->dreg, s390_r0);
2833                         s390_lr   (code, ins->dreg+1, s390_r1);
2834                 }
2835                         break;
2836                 case OP_LADD_OVF: {
2837                         short int *o[1];
2838                         s390_alr  (code, s390_r0, ins->sreg1);
2839                         s390_jnc  (code, 0); CODEPTR(code, o[0]);
2840                         s390_ahi  (code, s390_r1, 1);
2841                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2842                         PTRSLOT   (code, o[0]);
2843                         s390_ar   (code, s390_r1, ins->sreg2);
2844                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2845                         s390_lr   (code, ins->dreg, s390_r0);
2846                         s390_lr   (code, ins->dreg+1, s390_r1);
2847                 }
2848                         break;
2849                 case OP_LADD_OVF_UN: {
2850                         s390_alr  (code, s390_r0, ins->sreg1);
2851                         s390_alcr (code, s390_r1, ins->sreg2);
2852                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
2853                         s390_lr   (code, ins->dreg, s390_r0);
2854                         s390_lr   (code, ins->dreg+1, s390_r1);
2855                 }
2856                         break;
2857                 case OP_ADD_OVF_CARRY: {
2858                         CHECK_SRCDST_COM;
2859                         s390_lhi  (code, s390_r0, 0);
2860                         s390_lr   (code, s390_r1, s390_r0);
2861                         s390_alcr (code, s390_r0, s390_r1);
2862                         s390_ar   (code, ins->dreg, src2);
2863                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2864                         s390_ar   (code, ins->dreg, s390_r0);
2865                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2866                 }
2867                         break;
2868                 case OP_ADD_OVF_UN_CARRY: {
2869                         CHECK_SRCDST_COM;
2870                         s390_alcr (code, ins->dreg, src2);
2871                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
2872                 }
2873                         break;
2874                 case OP_SUBCC: {
2875                         CHECK_SRCDST_NCOM;
2876                         s390_slr (code, ins->dreg, src2);
2877                 }
2878                         break;
2879                 case CEE_SUB: {
2880                         CHECK_SRCDST_NCOM;
2881                         s390_sr   (code, ins->dreg, src2);
2882                 }
2883                         break;
2884                 case OP_SBB: {
2885                         CHECK_SRCDST_NCOM;
2886                         s390_slbr (code, ins->dreg, src2);
2887                 }
2888                         break;
2889                 case OP_SUBCC_IMM: {
2890                         if (s390_is_imm16 (-ins->inst_imm)) {
2891                                 if (ins->dreg != ins->sreg1) {
2892                                         s390_lr   (code, ins->dreg, ins->sreg1);
2893                                 }
2894                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2895                                 s390_slr  (code, ins->dreg, s390_r0);
2896                         } else {
2897                                 s390_basr (code, s390_r13, 0);
2898                                 s390_j    (code, 4);
2899                                 s390_word (code, ins->inst_imm);
2900                                 if (ins->dreg != ins->sreg1) {
2901                                         s390_lr   (code, ins->dreg, ins->sreg1);
2902                                 }
2903                                 s390_sl   (code, ins->dreg, 0, s390_r13, 4);
2904                         }
2905                 }
2906                         break;
2907                 case OP_SUB_IMM: {
2908                         if (s390_is_imm16 (-ins->inst_imm)) {
2909                                 if (ins->dreg != ins->sreg1) {
2910                                         s390_lr   (code, ins->dreg, ins->sreg1);
2911                                 }
2912                                 s390_ahi  (code, ins->dreg, -ins->inst_imm);
2913                         } else {
2914                                 s390_basr (code, s390_r13, 0);
2915                                 s390_j    (code, 4);
2916                                 s390_word (code, ins->inst_imm);
2917                                 if (ins->dreg != ins->sreg1) {
2918                                         s390_lr   (code, ins->dreg, ins->sreg1);
2919                                 }
2920                                 s390_s    (code, ins->dreg, 0, s390_r13, 4);
2921                         }
2922                 }
2923                         break;
2924                 case OP_SBB_IMM: {
2925                         if (ins->dreg != ins->sreg1) {
2926                                 s390_lr    (code, ins->dreg, ins->sreg1);
2927                         }
2928                         if (s390_is_imm16 (-ins->inst_imm)) {
2929                                 s390_lhi   (code, s390_r0, ins->inst_imm);
2930                                 s390_slbr  (code, ins->dreg, s390_r0);
2931                         } else {
2932                                 s390_basr (code, s390_r13, 0);
2933                                 s390_j    (code, 4);
2934                                 s390_word (code, ins->inst_imm);
2935                                 s390_slb  (code, ins->dreg, 0, s390_r13, 4);
2936                         }
2937                 }
2938                         break;
2939                 case CEE_SUB_OVF: {
2940                         CHECK_SRCDST_NCOM;
2941                         s390_sr   (code, ins->dreg, src2);
2942                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2943                 }
2944                         break;
2945                 case CEE_SUB_OVF_UN: {
2946                         CHECK_SRCDST_NCOM;
2947                         s390_slr  (code, ins->dreg, src2);
2948                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
2949                 }
2950                         break;
2951                 case OP_LSUB: {
2952                         s390_lr   (code, s390_r14, ins->sreg2);
2953                         s390_slr  (code, s390_r0, ins->sreg1);
2954                         s390_jnl  (code, 4);
2955                         s390_ahi  (code, s390_r14, 1);
2956                         s390_sr   (code, s390_r1, s390_r14);
2957                         s390_lr   (code, ins->dreg, s390_r0);
2958                         s390_lr   (code, ins->dreg+1, s390_r1);
2959                 }
2960                         break;
2961                 case OP_LSUB_OVF: {
2962                         short int *o[1];
2963                         s390_lr   (code, s390_r14, ins->sreg2);
2964                         s390_slr  (code, s390_r0, ins->sreg1);
2965                         s390_jnl  (code, 0); CODEPTR(code, o[0]);
2966                         s390_ahi  (code, s390_r14, 1);
2967                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2968                         PTRSLOT   (code, o[0]);
2969                         s390_sr   (code, s390_r1, s390_r14);
2970                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2971                         s390_lr   (code, ins->dreg, s390_r0);
2972                         s390_lr   (code, ins->dreg+1, s390_r1);
2973                 }
2974                         break;
2975                 case OP_LSUB_OVF_UN: {
2976                         s390_slr  (code, s390_r0, ins->sreg1);
2977                         s390_slbr (code, s390_r1, ins->sreg2);
2978                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, "OverflowException");
2979                         s390_lr   (code, ins->dreg, s390_r0);
2980                         s390_lr   (code, ins->dreg+1, s390_r1);
2981                 }
2982                         break;
2983                 case OP_SUB_OVF_CARRY: {
2984                         CHECK_SRCDST_NCOM;
2985                         s390_lhi  (code, s390_r0, 0);
2986                         s390_lr   (code, s390_r1, s390_r0);
2987                         s390_slbr (code, s390_r0, s390_r1);
2988                         s390_sr   (code, ins->dreg, src2);
2989                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2990                         s390_ar   (code, ins->dreg, s390_r0);
2991                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2992                 }
2993                         break;
2994                 case OP_SUB_OVF_UN_CARRY: {
2995                         CHECK_SRCDST_NCOM;
2996                         s390_slbr (code, ins->dreg, src2);
2997                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
2998                 }
2999                         break;
3000                 case CEE_AND: {
3001                         if (ins->sreg1 == ins->dreg) {
3002                                 s390_nr   (code, ins->dreg, ins->sreg2);
3003                         }
3004                         else {
3005                                 if (ins->sreg2 == ins->dreg) {
3006                                         s390_nr  (code, ins->dreg, ins->sreg1);
3007                                 }
3008                                 else {
3009                                         s390_lr  (code, ins->dreg, ins->sreg1);
3010                                         s390_nr  (code, ins->dreg, ins->sreg2);
3011                                 }
3012                         }
3013                 }
3014                         break;
3015                 case OP_AND_IMM: {
3016                         if (s390_is_imm16 (ins->inst_imm)) {
3017                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3018                                 if (ins->dreg != ins->sreg1) {
3019                                         s390_lr   (code, ins->dreg, ins->sreg1);
3020                                 }
3021                                 s390_nr   (code, ins->dreg, s390_r0);
3022                         } else {
3023                                 s390_basr (code, s390_r13, 0);
3024                                 s390_j    (code, 4);
3025                                 s390_word (code, ins->inst_imm);
3026                                 if (ins->dreg != ins->sreg1) {
3027                                         s390_lr   (code, ins->dreg, ins->sreg1);
3028                                 }
3029                                 s390_n    (code, ins->dreg, 0, s390_r13, 4);
3030                         }
3031                 }
3032                         break;
3033                 case CEE_DIV: {
3034                         s390_lr   (code, s390_r0, ins->sreg1);
3035                         s390_srda (code, s390_r0, 0, 32);
3036                         s390_dr   (code, s390_r0, ins->sreg2);
3037                         s390_lr   (code, ins->dreg, s390_r1);
3038                 }
3039                         break;
3040                 case CEE_DIV_UN: {
3041                         s390_lr   (code, s390_r0, ins->sreg1);
3042                         s390_srdl (code, s390_r0, 0, 32);
3043                         s390_dlr  (code, s390_r0, ins->sreg2);
3044                         s390_lr   (code, ins->dreg, s390_r1);
3045                 }
3046                         break;
3047                 case OP_DIV_IMM: {
3048                         if (s390_is_imm16 (ins->inst_imm)) {
3049                                 s390_lhi  (code, s390_r13, ins->inst_imm);
3050                                 s390_lr   (code, s390_r0, ins->sreg1);
3051                         } else {
3052                                 s390_basr (code, s390_r13, 0);
3053                                 s390_j    (code, 4);
3054                                 s390_word (code, ins->inst_imm);
3055                                 s390_lr   (code, s390_r0, ins->sreg1);
3056                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3057                         }
3058                         s390_srda (code, s390_r0, 0, 32);
3059                         s390_dr   (code, s390_r0, s390_r13);
3060                         s390_lr   (code, ins->dreg, s390_r1);
3061                 }
3062                         break;
3063                 case CEE_REM: {
3064                         s390_lr   (code, s390_r0, ins->sreg1);
3065                         s390_srda (code, s390_r0, 0, 32);
3066                         s390_dr   (code, s390_r0, ins->sreg2);
3067                         s390_lr   (code, ins->dreg, s390_r0);
3068                         break;
3069                 case CEE_REM_UN:
3070                         s390_lr   (code, s390_r0, ins->sreg1);
3071                         s390_srdl (code, s390_r0, 0, 32);
3072                         s390_dlr  (code, s390_r0, ins->sreg2);
3073                         s390_lr   (code, ins->dreg, s390_r0);
3074                 }
3075                         break;
3076                 case OP_REM_IMM: {
3077                         if (s390_is_imm16 (ins->inst_imm)) {
3078                                 s390_lhi  (code, s390_r13, ins->inst_imm);
3079                                 s390_lr   (code, s390_r0, ins->sreg1);
3080                         } else {
3081                                 s390_basr (code, s390_r13, 0);
3082                                 s390_j    (code, 4);
3083                                 s390_word (code, ins->inst_imm);
3084                                 s390_lr   (code, s390_r0, ins->sreg1);
3085                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3086                         }
3087                         s390_srda (code, s390_r0, 0, 32);
3088                         s390_dr   (code, s390_r0, s390_r13);
3089                         s390_lr   (code, ins->dreg, s390_r0);
3090                 }
3091                         break;
3092                 case CEE_OR: {
3093                         if (ins->sreg1 == ins->dreg) {
3094                                 s390_or   (code, ins->dreg, ins->sreg2);
3095                         }
3096                         else {
3097                                 if (ins->sreg2 == ins->dreg) {
3098                                         s390_or  (code, ins->dreg, ins->sreg1);
3099                                 }
3100                                 else {
3101                                         s390_lr  (code, ins->dreg, ins->sreg1);
3102                                         s390_or  (code, ins->dreg, ins->sreg2);
3103                                 }
3104                         }
3105                 }
3106                         break;
3107                 case OP_OR_IMM: {
3108                         if (s390_is_imm16 (ins->inst_imm)) {
3109                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3110                                 if (ins->dreg != ins->sreg1) {
3111                                         s390_lr   (code, ins->dreg, ins->sreg1);
3112                                 }
3113                                 s390_or   (code, ins->dreg, s390_r0);
3114                         } else {
3115                                 s390_basr (code, s390_r13, 0);
3116                                 s390_j    (code, 4);
3117                                 s390_word (code, ins->inst_imm);
3118                                 if (ins->dreg != ins->sreg1) {
3119                                         s390_lr   (code, ins->dreg, ins->sreg1);
3120                                 }
3121                                 s390_o    (code, ins->dreg, 0, s390_r13, 4);
3122                         }
3123                 }
3124                         break;
3125                 case CEE_XOR: {
3126                         if (ins->sreg1 == ins->dreg) {
3127                                 s390_xr   (code, ins->dreg, ins->sreg2);
3128                         }
3129                         else {
3130                                 if (ins->sreg2 == ins->dreg) {
3131                                         s390_xr  (code, ins->dreg, ins->sreg1);
3132                                 }
3133                                 else {
3134                                         s390_lr  (code, ins->dreg, ins->sreg1);
3135                                         s390_xr  (code, ins->dreg, ins->sreg2);
3136                                 }
3137                         }
3138                 }
3139                         break;
3140                 case OP_XOR_IMM: {
3141                         if (s390_is_imm16 (ins->inst_imm)) {
3142                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3143                                 if (ins->dreg != ins->sreg1) {
3144                                         s390_lr   (code, ins->dreg, ins->sreg1);
3145                                 }
3146                                 s390_xr   (code, ins->dreg, s390_r0);
3147                         } else {
3148                                 s390_basr (code, s390_r13, 0);
3149                                 s390_j    (code, 4);
3150                                 s390_word (code, ins->inst_imm);
3151                                 if (ins->dreg != ins->sreg1) {
3152                                         s390_lr   (code, ins->dreg, ins->sreg1);
3153                                 }
3154                                 s390_x    (code, ins->dreg, 0, s390_r13, 4);
3155                         }
3156                 }
3157                         break;
3158                 case CEE_SHL: {
3159                         CHECK_SRCDST_NCOM;
3160                         s390_sll  (code, ins->dreg, src2, 0);
3161                 }
3162                         break;
3163                 case OP_SHL_IMM: {
3164                         if (ins->sreg1 != ins->dreg) {
3165                                 s390_lr   (code, ins->dreg, ins->sreg1);
3166                         }
3167                         s390_sll  (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3168                 }
3169                         break;
3170                 case CEE_SHR: {
3171                         CHECK_SRCDST_NCOM;
3172                         s390_sra  (code, ins->dreg, src2, 0);
3173                 }
3174                         break;
3175                 case OP_SHR_IMM: {
3176                         if (ins->sreg1 != ins->dreg) {
3177                                 s390_lr   (code, ins->dreg, ins->sreg1);
3178                         }
3179                         s390_sra  (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3180                 }
3181                         break;
3182                 case OP_SHR_UN_IMM: {
3183                         if (ins->sreg1 != ins->dreg) {
3184                                 s390_lr   (code, ins->dreg, ins->sreg1);
3185                         }
3186                         s390_srl  (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3187                 }
3188                         break;
3189                 case CEE_SHR_UN: {
3190                         CHECK_SRCDST_NCOM;
3191                         s390_srl  (code, ins->dreg, src2, 0);
3192                 }
3193                         break;
3194                 case CEE_NOT: {
3195                         if (ins->sreg1 != ins->dreg) {
3196                                 s390_lr   (code, ins->dreg, ins->sreg1);
3197                         }
3198                         s390_lhi (code, s390_r0, -1);
3199                         s390_xr  (code, ins->dreg, s390_r0);
3200                 }
3201                         break;
3202                 case CEE_NEG: {
3203                         s390_lcr (code, ins->dreg, ins->sreg1);
3204                 }
3205                         break;
3206                 case CEE_MUL: {
3207                         if (ins->sreg1 == ins->dreg) {
3208                                 s390_msr  (code, ins->dreg, ins->sreg2);
3209                         }
3210                         else {
3211                                 if (ins->sreg2 == ins->dreg) {
3212                                         s390_msr (code, ins->dreg, ins->sreg1);
3213                                 }
3214                                 else {
3215                                         s390_lr  (code, ins->dreg, ins->sreg1);
3216                                         s390_msr (code, ins->dreg, ins->sreg2);
3217                                 }
3218                         }
3219                 }
3220                         break;
3221                 case OP_MUL_IMM: {
3222                         if (s390_is_imm16 (ins->inst_imm)) {
3223                                 s390_lhi  (code, s390_r13, ins->inst_imm);
3224                         } else {
3225                                 s390_basr (code, s390_r13, 0);
3226                                 s390_j    (code, 4);
3227                                 s390_word (code, ins->inst_imm);
3228 //                              if (ins->dreg != ins->sreg1) {
3229 //                                      s390_lr   (code, ins->dreg, ins->sreg1);
3230 //                              }
3231                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3232                         }
3233                         if (ins->dreg != ins->sreg1) {
3234                                 s390_lr   (code, ins->dreg, ins->sreg1);
3235                         }
3236                         s390_msr  (code, ins->dreg, s390_r13);
3237                 }
3238                         break;
3239                 case CEE_MUL_OVF: {
3240                         short int *o[2];
3241                         s390_ltr  (code, s390_r1, ins->sreg1);
3242                         s390_jz   (code, 0); CODEPTR(code, o[0]);
3243                         s390_ltr  (code, s390_r0, ins->sreg2);
3244                         s390_jnz  (code, 6);
3245                         s390_lhi  (code, s390_r1, 0);
3246                         s390_j    (code, 0); CODEPTR(code, o[1]);
3247                         s390_xr   (code, s390_r0, s390_r1);
3248                         s390_msr  (code, s390_r1, ins->sreg2);
3249                         s390_xr   (code, s390_r0, s390_r1);
3250                         s390_srl  (code, s390_r0, 0, 31);
3251                         s390_ltr  (code, s390_r0, s390_r0);
3252                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3253                         PTRSLOT   (code, o[0]);
3254                         PTRSLOT   (code, o[1]);
3255                         s390_lr   (code, ins->dreg, s390_r1);
3256                 }
3257                         break;
3258                 case CEE_MUL_OVF_UN: {
3259                         s390_lhi  (code, s390_r0, 0);
3260                         s390_lr   (code, s390_r1, ins->sreg1);
3261                         s390_mlr  (code, s390_r0, ins->sreg2);
3262                         s390_ltr  (code, s390_r0, s390_r0);
3263                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3264                         s390_lr   (code, ins->dreg, s390_r1);
3265                 }
3266                         break;
3267                 case OP_LMUL: {
3268                         s390_l    (code, s390_r0, 0, ins->sreg1, 4);
3269                         s390_srda (code, s390_r0, 0, 32);
3270                         s390_m    (code, s390_r0, 0, ins->sreg2, 4);
3271                         s390_l    (code, s390_r0, 0, ins->sreg1, 4);
3272                         s390_srl  (code, s390_r0, 0, 31);
3273                         s390_a    (code, s390_r0, 0, ins->sreg1, 0);
3274                         s390_l    (code, s390_r13, 0, ins->sreg2, 0);
3275                         s390_srl  (code, s390_r13, 0, 31);
3276                         s390_ms   (code, s390_r13, 0, ins->sreg1, 4);
3277                         s390_ar   (code, s390_r0, s390_r13);
3278                         s390_st   (code, s390_r0, 0, ins->dreg, 0);
3279                         s390_st   (code, s390_r1, 0, ins->dreg, 4);
3280                 }
3281                         break;
3282                 case OP_ICONST:
3283                 case OP_SETREGIMM: {
3284                         if (s390_is_imm16(ins->inst_c0)) {
3285                                 s390_lhi  (code, ins->dreg, ins->inst_c0);
3286                         } else {
3287                                 s390_basr (code, s390_r13, 0);
3288                                 s390_j    (code, 4);
3289                                 s390_word (code, ins->inst_c0);
3290                                 s390_l    (code, ins->dreg, 0, s390_r13, 4);
3291                         }
3292                 }
3293                         break;
3294                 case OP_AOTCONST: {
3295                         s390_basr (code, s390_r13, 0);
3296                         s390_j    (code, 4);
3297                         mono_add_patch_info (cfg, code - cfg->native_code,
3298                                 (MonoJumpInfoType)ins->inst_i1, ins->inst_p0);
3299                         s390_word (code, 0);
3300                         s390_l    (code,ins->dreg, 0, s390_r13, 4);
3301                 }
3302                         break;
3303                 case CEE_CONV_I4:
3304                 case CEE_CONV_U4:
3305                 case OP_MOVE:
3306                 case OP_SETREG: {
3307                         if (ins->dreg != ins->sreg1) {
3308                                 s390_lr (code, ins->dreg, ins->sreg1);
3309                         }
3310                 }
3311                         break;
3312                 case OP_SETLRET: {
3313                         int saved = ins->sreg1;
3314                         if (ins->sreg1 == s390_r2) {
3315                                 s390_lr (code, s390_r0, ins->sreg1);
3316                                 saved = s390_r0;
3317                         }
3318                         if (ins->sreg2 != s390_r2)
3319                                 s390_lr (code, s390_r2, ins->sreg2);
3320                         if (saved != s390_r3)
3321                                 s390_lr (code, s390_r3, saved);
3322                         break;
3323                 }
3324                 case OP_SETFREG:
3325                 case OP_FMOVE: {
3326                         if (ins->dreg != ins->sreg1) {
3327                                 s390_ldr   (code, ins->dreg, ins->sreg1);
3328                         }
3329                 }
3330                         break;
3331                 case OP_S390_SETF4RET: {
3332                         s390_ledbr (code, ins->dreg, ins->sreg1);
3333                 }
3334                         break;
3335                 case OP_TLS_GET: {
3336                         if (s390_is_imm16 (ins->inst_offset)) {
3337                                 s390_lhi (code, s390_r13, ins->inst_offset);
3338                         } else {
3339                                 s390_bras (code, s390_r13, 0);
3340                                 s390_j    (code, 4);
3341                                 s390_word (code, ins->inst_offset);
3342                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3343                         }
3344                         s390_ear (code, s390_r1, 0);
3345                         s390_l   (code, ins->dreg, s390_r13, s390_r1, 0);
3346                 }
3347                         break;
3348                 case OP_FCONV_TO_R4: {
3349                         NOT_IMPLEMENTED("OP_FCONV_TO_R4");
3350                         if ((ins->next) &&
3351                              (ins->next->opcode != OP_FMOVE) &&
3352                              (ins->next->opcode != OP_STORER4_MEMBASE_REG))
3353                                 s390_ledbr (code, ins->dreg, ins->sreg1);
3354                 }
3355                         break;
3356                 case CEE_JMP: {
3357                         if (cfg->method->save_lmf)
3358                                 restoreLMF(code, cfg->frame_reg, cfg->stack_usage);
3359
3360                         if (cfg->flags & MONO_CFG_HAS_TAIL) {
3361                                 code = emit_load_volatile_registers(code, cfg);
3362                         }
3363
3364                         code = backUpStackPtr(cfg, code, STK_BASE);
3365                         s390_l   (code, s390_r14, 0, STK_BASE, S390_RET_ADDR_OFFSET);
3366                         mono_add_patch_info (cfg, code - cfg->native_code,
3367                                              MONO_PATCH_INFO_METHOD_JUMP,
3368                                              ins->inst_p0);
3369                         s390_jcl (code, S390_CC_UN, 0);
3370                 }
3371                         break;
3372                 case OP_CHECK_THIS: {
3373                         /* ensure ins->sreg1 is not NULL */
3374                         s390_icm (code, s390_r0, 15, ins->sreg1, 0);
3375                 }
3376                         break;
3377                 case OP_ARGLIST: {
3378                         int offset = cfg->sig_cookie + cfg->stack_usage;
3379
3380                         if (s390_is_imm16 (offset))
3381                                 s390_lhi  (code, s390_r0, offset);
3382                         else {
3383                                 s390_basr (code, s390_r13, 0);
3384                                 s390_j    (code, 4);
3385                                 s390_word (code, offset);
3386                                 s390_l    (code, s390_r0, 0, s390_r13, 0);
3387                         }
3388                         s390_ar   (code, s390_r0, cfg->frame_reg);
3389                         s390_st   (code, s390_r0, 0, ins->sreg1, 0);
3390                 }
3391                         break;
3392                 case OP_FCALL: {
3393                         call = (MonoCallInst*)ins;
3394                         if (ins->flags & MONO_INST_HAS_METHOD)
3395                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_METHOD,
3396                                                      call->method);
3397                         else
3398                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS,
3399                                                      call->fptr);
3400                         s390_brasl (code, s390_r14, 0);
3401                         if (call->signature->ret->type == MONO_TYPE_R4)
3402                                 s390_ldebr (code, s390_f0, s390_f0);
3403                 }
3404                         break;
3405                 case OP_LCALL:
3406                 case OP_VCALL:
3407                 case OP_VOIDCALL:
3408                 case CEE_CALL: {
3409                         call = (MonoCallInst*)ins;
3410                         if (ins->flags & MONO_INST_HAS_METHOD)
3411                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_METHOD, call->method);
3412                         else
3413                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS, call->fptr);
3414                         s390_brasl (code, s390_r14, 0);
3415                 }
3416                         break;
3417                 case OP_FCALL_REG: {
3418                         call = (MonoCallInst*)ins;
3419                         s390_lr   (code, s390_r1, ins->sreg1);
3420                         s390_basr (code, s390_r14, s390_r1);
3421                         if (call->signature->ret->type == MONO_TYPE_R4)
3422                                 s390_ldebr (code, s390_f0, s390_f0);
3423                 }
3424                         break;
3425                 case OP_LCALL_REG:
3426                 case OP_VCALL_REG:
3427                 case OP_VOIDCALL_REG:
3428                 case OP_CALL_REG: {
3429                         s390_lr   (code, s390_r1, ins->sreg1);
3430                         s390_basr (code, s390_r14, s390_r1);
3431                 }
3432                         break;
3433                 case OP_FCALL_MEMBASE: {
3434                         call = (MonoCallInst*)ins;
3435                         s390_l    (code, s390_r1, 0, ins->sreg1, ins->inst_offset);
3436                         s390_basr (code, s390_r14, s390_r1);
3437                         if (call->signature->ret->type == MONO_TYPE_R4)
3438                                 s390_ldebr (code, s390_f0, s390_f0);
3439                 }
3440                         break;
3441                 case OP_LCALL_MEMBASE:
3442                 case OP_VCALL_MEMBASE:
3443                 case OP_VOIDCALL_MEMBASE:
3444                 case OP_CALL_MEMBASE: {
3445                         s390_l    (code, s390_r1, 0, ins->sreg1, ins->inst_offset);
3446                         s390_basr (code, s390_r14, s390_r1);
3447                 }
3448                         break;
3449                 case OP_OUTARG:
3450                         g_assert_not_reached ();
3451                         break;
3452                 case OP_LOCALLOC: {
3453                         /*------------------------------------------*/
3454                         /* To allocate space on the stack we have   */
3455                         /* to allow room for parameters passed in   */
3456                         /* calls, the backchain pointer and round   */
3457                         /* it to our stack alignment requirements   */
3458                         /*------------------------------------------*/
3459                         int alloca_skip = S390_MINIMAL_STACK_SIZE + cfg->param_area;
3460                         int area_offset = S390_ALIGN(alloca_skip, S390_STACK_ALIGNMENT);
3461                         s390_lr   (code, s390_r1, ins->sreg1);
3462                         if (ins->flags & MONO_INST_INIT)
3463                                 s390_lr   (code, s390_r0, ins->sreg1);
3464                         s390_ahi  (code, s390_r1, 14);
3465                         s390_srl  (code, s390_r1, 0, 3);
3466                         s390_sll  (code, s390_r1, 0, 3);
3467                         if (cfg->method->save_lmf) {
3468                                 /*----------------------------------*/
3469                                 /* we have to adjust lmf ebp value  */
3470                                 /*----------------------------------*/
3471                                 int lmfOffset = cfg->stack_usage - sizeof(MonoLMF);
3472
3473                                 s390_lr (code, s390_r13, cfg->frame_reg);
3474                                 if (s390_is_uimm16(lmfOffset))
3475                                         s390_ahi   (code, s390_r13, lmfOffset);
3476                                 else {
3477                                         s390_basr (code, s390_r14, 0);
3478                                         s390_j    (code, 4);
3479                                         s390_word (code, lmfOffset);
3480                                         s390_a    (code, s390_r13, 0, s390_r14, 4);
3481                                 }
3482                                 s390_lr (code, s390_r14, STK_BASE);
3483                                 s390_sr (code, s390_r14, s390_r1);
3484                                 s390_st (code, s390_r14, 0, s390_r13,
3485                                          G_STRUCT_OFFSET(MonoLMF, ebp));
3486                         }
3487                         s390_l    (code, s390_r13, 0, STK_BASE, 0);
3488                         s390_sr   (code, STK_BASE, s390_r1);
3489                         s390_st   (code, s390_r13, 0, STK_BASE, 0);
3490                         s390_la   (code, ins->dreg, 0, STK_BASE, area_offset);
3491                         s390_srl  (code, ins->dreg, 0, 3);
3492                         s390_sll  (code, ins->dreg, 0, 3);
3493                         if (ins->flags & MONO_INST_INIT) {
3494                                 s390_lr   (code, s390_r1, s390_r0);
3495                                 s390_lr   (code, s390_r0, ins->dreg);
3496                                 s390_lr   (code, s390_r14, s390_r12);
3497                                 s390_lhi  (code, s390_r13, 0);
3498                                 s390_mvcle(code, s390_r0, s390_r12, 0, 0);
3499                                 s390_jo   (code, -2);
3500                                 s390_lr   (code, s390_r12, s390_r14);
3501                         }
3502                 }
3503                         break;
3504                 case CEE_RET: {
3505                         s390_br  (code, s390_r14);
3506                 }
3507                         break;
3508                 case CEE_THROW: {
3509                         s390_lr (code, s390_r2, ins->sreg1);
3510                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD,
3511                                              (gpointer)"mono_arch_throw_exception");
3512                         s390_brasl (code, s390_r14, 0);
3513                 }
3514                         break;
3515                 case OP_RETHROW: {
3516                         s390_lr (code, s390_r2, ins->sreg1);
3517                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD,
3518                                              (gpointer)"mono_arch_rethrow_exception");
3519                         s390_brasl (code, s390_r14, 0);
3520                 }
3521                         break;
3522                 case OP_START_HANDLER: {
3523                         if (s390_is_uimm12 (ins->inst_left->inst_offset)) {
3524                                 s390_st   (code, s390_r14, 0,
3525                                            ins->inst_left->inst_basereg,
3526                                            ins->inst_left->inst_offset);
3527                         } else {
3528                                 s390_basr (code, s390_r13, 0);
3529                                 s390_j    (code, 4);
3530                                 s390_word (code, ins->inst_left->inst_offset);
3531                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3532                                 s390_st   (code, s390_r14, s390_r13,
3533                                            ins->inst_left->inst_basereg, 0);
3534                         }
3535                 }
3536                         break;
3537                 case OP_ENDFILTER: {
3538                         if (ins->sreg1 != s390_r2)
3539                                 s390_lr (code, s390_r2, ins->sreg1);
3540                         if (s390_is_uimm12 (ins->inst_left->inst_offset)) {
3541                                 s390_l  (code, s390_r14, 0, ins->inst_left->inst_basereg,
3542                                          ins->inst_left->inst_offset);
3543                         } else {
3544                                 s390_basr (code, s390_r13, 0);
3545                                 s390_j    (code, 4);
3546                                 s390_word (code, ins->inst_left->inst_offset);
3547                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3548                                 s390_l    (code, s390_r14, s390_r13,
3549                                            ins->inst_left->inst_basereg, 0);
3550                         }
3551                         s390_br  (code, s390_r14);
3552                 }
3553                         break;
3554                 case CEE_ENDFINALLY: {
3555                         if (s390_is_uimm12 (ins->inst_left->inst_offset)) {
3556                                 s390_l  (code, s390_r14, 0, ins->inst_left->inst_basereg,
3557                                          ins->inst_left->inst_offset);
3558                         } else {
3559                                 s390_basr (code, s390_r13, 0);
3560                                 s390_j    (code, 4);
3561                                 s390_word (code, ins->inst_left->inst_offset);
3562                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3563                                 s390_l    (code, s390_r14, s390_r13,
3564                                            ins->inst_left->inst_basereg, 0);
3565                         }
3566                         s390_br  (code, s390_r14);
3567                 }
3568                         break;
3569                 case OP_CALL_HANDLER: {
3570                         mono_add_patch_info (cfg, code-cfg->native_code,
3571                                              MONO_PATCH_INFO_BB, ins->inst_target_bb);
3572                         s390_brasl (code, s390_r14, 0);
3573                 }
3574                         break;
3575                 case OP_LABEL: {
3576                         ins->inst_c0 = code - cfg->native_code;
3577                 }
3578                         break;
3579                 case CEE_BR:
3580                         EMIT_UNCOND_BRANCH(ins);
3581                         break;
3582                 case OP_BR_REG: {
3583                         s390_br  (code, ins->sreg1);
3584                 }
3585                         break;
3586                 case OP_CEQ: {
3587                         s390_lhi (code, ins->dreg, 1);
3588                         s390_jz  (code, 4);
3589                         s390_lhi (code, ins->dreg, 0);
3590                 }
3591                         break;
3592                 case OP_CLT: {
3593                         s390_lhi (code, ins->dreg, 1);
3594                         s390_jl  (code, 4);
3595                         s390_lhi (code, ins->dreg, 0);
3596                 }
3597                         break;
3598                 case OP_CLT_UN: {
3599                         s390_lhi (code, ins->dreg, 1);
3600                         s390_jlo (code, 4);
3601                         s390_lhi (code, ins->dreg, 0);
3602                 }
3603                         break;
3604                 case OP_CGT: {
3605                         s390_lhi (code, ins->dreg, 1);
3606                         s390_jh  (code, 4);
3607                         s390_lhi (code, ins->dreg, 0);
3608                 }
3609                         break;
3610                 case OP_CGT_UN: {
3611                         s390_lhi (code, ins->dreg, 1);
3612                         s390_jho (code, 4);
3613                         s390_lhi (code, ins->dreg, 0);
3614                 }
3615                         break;
3616                 case OP_COND_EXC_EQ:
3617                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_EQ, ins->inst_p1);
3618                         break;
3619                 case OP_COND_EXC_NE_UN:
3620                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NE, ins->inst_p1);
3621                         break;
3622                 case OP_COND_EXC_LT:
3623                 case OP_COND_EXC_LT_UN:
3624                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, ins->inst_p1);
3625                         break;
3626                 case OP_COND_EXC_GT:
3627                 case OP_COND_EXC_GT_UN:
3628                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GT, ins->inst_p1);
3629                         break;
3630                 case OP_COND_EXC_GE:
3631                 case OP_COND_EXC_GE_UN:
3632                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GE, ins->inst_p1);
3633                         break;
3634                 case OP_COND_EXC_LE:
3635                 case OP_COND_EXC_LE_UN:
3636                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LE, ins->inst_p1);
3637                         break;
3638                 case OP_COND_EXC_OV:
3639                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, ins->inst_p1);
3640                         break;
3641                 case OP_COND_EXC_NO:
3642                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NO, ins->inst_p1);
3643                         break;
3644                 case OP_COND_EXC_C:
3645                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, ins->inst_p1);
3646                         break;
3647                 case OP_COND_EXC_NC:
3648                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, ins->inst_p1);
3649                         break;
3650                 case CEE_BEQ:
3651                         EMIT_COND_BRANCH (ins, S390_CC_EQ);
3652                         break;
3653                 case CEE_BNE_UN:
3654                         EMIT_COND_BRANCH (ins, S390_CC_NE);
3655                         break;
3656                 case CEE_BLT:
3657                 case CEE_BLT_UN:
3658                         EMIT_COND_BRANCH (ins, S390_CC_LT);
3659                         break;
3660                 case CEE_BGT:
3661                 case CEE_BGT_UN:
3662                         EMIT_COND_BRANCH (ins, S390_CC_GT);
3663                         break;
3664                 case CEE_BGE:
3665                 case CEE_BGE_UN:
3666                         EMIT_COND_BRANCH (ins, S390_CC_GE);
3667                         break;
3668                 case CEE_BLE:
3669                 case CEE_BLE_UN:
3670                         EMIT_COND_BRANCH (ins, S390_CC_LE);
3671                         break;
3672
3673                 /* floating point opcodes */
3674                 case OP_R8CONST: {
3675                         if (*((float *) ins->inst_p0) == 0) {
3676                                 s390_lzdr (code, ins->dreg);
3677                         } else {
3678                                 s390_basr  (code, s390_r13, 0);
3679                                 s390_j     (code, 4);
3680                                 s390_word  (code, ins->inst_p0);
3681                                 s390_l     (code, s390_r13, 0, s390_r13, 4);
3682                                 s390_ld    (code, ins->dreg, 0, s390_r13, 0);
3683                         }
3684                 }
3685                         break;
3686                 case OP_R4CONST: {
3687                         if (*((float *) ins->inst_p0) == 0) {
3688                                 s390_lzdr (code, ins->dreg);
3689                         } else {
3690                                 s390_basr (code, s390_r13, 0);
3691                                 s390_j    (code, 4);
3692                                 s390_word (code, ins->inst_p0);
3693                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3694                                 s390_ldeb (code, ins->dreg, 0, s390_r13, 0);
3695                         }
3696                 }
3697                         break;
3698                 case OP_STORER8_MEMBASE_REG: {
3699                         if (s390_is_uimm12(ins->inst_offset)) {
3700                                 s390_std  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
3701                         } else {
3702                                 s390_basr (code, s390_r13, 0);
3703                                 s390_j    (code, 4);
3704                                 s390_word (code, ins->inst_offset);
3705                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3706                                 s390_std  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
3707                         }
3708                 }
3709                         break;
3710                 case OP_LOADR8_MEMBASE: {
3711                         if (s390_is_uimm12(ins->inst_offset)) {
3712                                 s390_ld   (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
3713                         } else {
3714                                 s390_basr (code, s390_r13, 0);
3715                                 s390_j    (code, 4);
3716                                 s390_word (code, ins->inst_offset);
3717                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3718                                 s390_ld   (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
3719                         }
3720                 }
3721                         break;
3722                 case OP_STORER4_MEMBASE_REG: {
3723                         if (s390_is_uimm12(ins->inst_offset)) {
3724                                 s390_ledbr(code, s390_f15, ins->sreg1);
3725                                 s390_ste  (code, s390_f15, 0, ins->inst_destbasereg, ins->inst_offset);
3726                         } else {
3727                                 s390_basr (code, s390_r13, 0);
3728                                 s390_j    (code, 4);
3729                                 s390_word (code, ins->inst_offset);
3730                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3731                                 s390_ledbr(code, s390_f15, ins->sreg1);
3732                                 s390_ste  (code, s390_f15, s390_r13, ins->inst_destbasereg, 0);
3733                         }
3734                 }
3735                         break;
3736                 case OP_LOADR4_MEMBASE: {
3737                         if (s390_is_uimm12(ins->inst_offset)) {
3738                                 s390_ldeb (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
3739                         } else {
3740                                 s390_basr (code, s390_r13, 0);
3741                                 s390_j    (code, 4);
3742                                 s390_word (code, ins->inst_offset);
3743                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3744                                 s390_ldeb (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
3745                         }
3746                 }
3747                         break;
3748                 case CEE_CONV_R_UN: {
3749                         s390_cdfbr (code, ins->dreg, ins->sreg1);
3750                         s390_ltr   (code, ins->sreg1, ins->sreg1);
3751                         s390_jnl   (code, 12);
3752                         s390_basr  (code, s390_r13, 0);
3753                         s390_j     (code, 6);
3754                         s390_word  (code, 0x41f00000);
3755                         s390_word  (code, 0);
3756                         s390_adb   (code, ins->dreg, 0, s390_r13, 4);
3757                 }
3758                         break;
3759                 case CEE_CONV_R4: {
3760                         s390_cdfbr (code, ins->dreg, ins->sreg1);
3761                 }
3762                         break;
3763                 case CEE_CONV_R8: {
3764                         s390_cdfbr (code, ins->dreg, ins->sreg1);
3765                 }
3766                         break;
3767                 case OP_FCONV_TO_I1:
3768                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 1, TRUE);
3769                         break;
3770                 case OP_FCONV_TO_U1:
3771                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 1, FALSE);
3772                         break;
3773                 case OP_FCONV_TO_I2:
3774                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 2, TRUE);
3775                         break;
3776                 case OP_FCONV_TO_U2:
3777                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 2, FALSE);
3778                         break;
3779                 case OP_FCONV_TO_I4:
3780                 case OP_FCONV_TO_I:
3781                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 4, TRUE);
3782                         break;
3783                 case OP_FCONV_TO_U4:
3784                 case OP_FCONV_TO_U:
3785                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 4, FALSE);
3786                         break;
3787                 case OP_FCONV_TO_I8:
3788                 case OP_FCONV_TO_U8:
3789                         g_assert_not_reached ();
3790                         /* Implemented as helper calls */
3791                         break;
3792                 case OP_LCONV_TO_R_UN:
3793                         g_assert_not_reached ();
3794                         /* Implemented as helper calls */
3795                         break;
3796                 case OP_LCONV_TO_OVF_I: {
3797                         /* Valid ints: 0xffffffff:8000000 to 00000000:0x7f000000 */
3798                         short int *o[5];
3799                         s390_ltr  (code, ins->sreg1, ins->sreg1);
3800                         s390_jnl  (code, 0); CODEPTR(code, o[0]);
3801                         s390_ltr  (code, ins->sreg2, ins->sreg2);
3802                         s390_jnl  (code, 0); CODEPTR(code, o[1]);
3803                         s390_lhi  (code, s390_r13, -1);
3804                         s390_cr   (code, ins->sreg2, s390_r13);
3805                         s390_jnz  (code, 0); CODEPTR(code, o[2]);
3806                         if (ins->dreg != ins->sreg1)
3807                                 s390_lr   (code, ins->dreg, ins->sreg1);
3808                         s390_j    (code, 0); CODEPTR(code, o[3]);
3809                         PTRSLOT(code, o[0]);
3810                         s390_ltr  (code, ins->sreg2, ins->sreg2);
3811                         s390_jz   (code, 0); CODEPTR(code, o[4]);
3812                         PTRSLOT(code, o[1]);
3813                         PTRSLOT(code, o[2]);
3814                         mono_add_patch_info (cfg, code - cfg->native_code,
3815                                              MONO_PATCH_INFO_EXC, "OverflowException");
3816                         s390_brasl (code, s390_r14, 0);
3817                         PTRSLOT(code, o[3]);
3818                         PTRSLOT(code, o[4]);
3819                 }
3820                         break;
3821                 case OP_SQRT: {
3822                         s390_sqdbr (code, ins->dreg, ins->sreg1);
3823                 }
3824                         break;
3825                 case OP_FADD: {
3826                         CHECK_SRCDST_COM_F;
3827                         s390_adbr (code, ins->dreg, src2);
3828                 }
3829                         break;
3830                 case OP_FSUB: {
3831                         CHECK_SRCDST_NCOM_F;
3832                         s390_sdbr (code, ins->dreg, src2);
3833                 }
3834                         break;
3835                 case OP_FMUL: {
3836                         CHECK_SRCDST_COM_F;
3837                         s390_mdbr (code, ins->dreg, src2);
3838                 }
3839                         break;
3840                 case OP_FDIV: {
3841                         CHECK_SRCDST_NCOM_F;
3842                         s390_ddbr (code, ins->dreg, src2);
3843                 }
3844                         break;
3845                 case OP_FNEG: {
3846                         s390_lcdbr (code, ins->dreg, ins->sreg1);
3847                 }
3848                         break;
3849                 case OP_FREM: {
3850                         CHECK_SRCDST_NCOM_F;
3851                         s390_didbr (code, ins->dreg, src2, 5, s390_f15);
3852                 }
3853                         break;
3854                 case OP_FCOMPARE: {
3855                         s390_cdbr (code, ins->sreg1, ins->sreg2);
3856                 }
3857                         break;
3858                 case OP_FCEQ: {
3859                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3860                         s390_lhi   (code, ins->dreg, 1);
3861                         s390_je    (code, 4);
3862                         s390_lhi   (code, ins->dreg, 0);
3863                 }
3864                         break;
3865                 case OP_FCLT: {
3866                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3867                         s390_lhi   (code, ins->dreg, 1);
3868                         s390_jl    (code, 4);
3869                         s390_lhi   (code, ins->dreg, 0);
3870                 }
3871                         break;
3872                 case OP_FCLT_UN: {
3873                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3874                         s390_lhi   (code, ins->dreg, 1);
3875                         s390_jlo   (code, 4);
3876                         s390_lhi   (code, ins->dreg, 0);
3877                 }
3878                         break;
3879                 case OP_FCGT: {
3880                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3881                         s390_lhi   (code, ins->dreg, 1);
3882                         s390_jh    (code, 4);
3883                         s390_lhi   (code, ins->dreg, 0);
3884                 }
3885                         break;
3886                 case OP_FCGT_UN: {
3887                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3888                         s390_lhi   (code, ins->dreg, 1);
3889                         s390_jho   (code, 4);
3890                         s390_lhi   (code, ins->dreg, 0);
3891                 }
3892                         break;
3893                 case OP_FBEQ:
3894                         EMIT_COND_BRANCH (ins, S390_CC_EQ|S390_CC_OV);
3895                         break;
3896                 case OP_FBNE_UN:
3897                         EMIT_COND_BRANCH (ins, S390_CC_NE|S390_CC_OV);
3898                         break;
3899                 case OP_FBLT:
3900                         EMIT_COND_BRANCH (ins, S390_CC_LT);
3901                         break;
3902                 case OP_FBLT_UN:
3903                         EMIT_COND_BRANCH (ins, S390_CC_LT|S390_CC_OV);
3904                         break;
3905                 case OP_FBGT:
3906                         EMIT_COND_BRANCH (ins, S390_CC_GT);
3907                         break;
3908                 case OP_FBGT_UN:
3909                         EMIT_COND_BRANCH (ins, S390_CC_GT|S390_CC_OV);
3910                         break;
3911                 case OP_FBGE:
3912                         EMIT_COND_BRANCH (ins, S390_CC_GE);
3913                         break;
3914                 case OP_FBGE_UN:
3915                         EMIT_COND_BRANCH (ins, S390_CC_GE|S390_CC_OV);
3916                         break;
3917                 case OP_FBLE:
3918                         EMIT_COND_BRANCH (ins, S390_CC_LE);
3919                         break;
3920                 case OP_FBLE_UN:
3921                         EMIT_COND_BRANCH (ins, S390_CC_LE|S390_CC_OV);
3922                         break;
3923                 case CEE_CKFINITE: {
3924                         short *o;
3925                         s390_lhi  (code, s390_r13, 0x7f);
3926                         s390_tcdb (code, ins->sreg1, 0, s390_r13, 0);
3927                         s390_jz   (code, 0); CODEPTR(code, o);
3928                         mono_add_patch_info (cfg, code - cfg->native_code,
3929                                              MONO_PATCH_INFO_EXC, "ArithmeticException");
3930                         s390_brasl (code, s390_r14,0);
3931                         PTRSLOT(code, o);
3932                 }
3933                         break;
3934                 case OP_S390_MOVE: {
3935                         if (ins->unused > 0) {
3936                                 if (ins->unused <= 256) {
3937                                         s390_mvc  (code, ins->unused, ins->dreg,
3938                                                    ins->inst_offset, ins->sreg1, ins->inst_imm);
3939                                 } else {
3940                                         s390_lr   (code, s390_r0, ins->dreg);
3941                                         if (s390_is_imm16 (ins->inst_offset)) {
3942                                                 s390_ahi  (code, s390_r0, ins->inst_offset);
3943                                         } else {
3944                                                 s390_basr (code, s390_r13, 0);
3945                                                 s390_j    (code, 4);
3946                                                 s390_word (code, ins->inst_offset);
3947                                                 s390_a    (code, s390_r0, 0, s390_r13, 4);
3948                                         }
3949                                         s390_lr   (code, s390_r14, s390_r12);
3950                                         s390_lr   (code, s390_r12, ins->sreg1);
3951                                         if (s390_is_imm16 (ins->inst_imm)) {
3952                                                 s390_ahi  (code, s390_r12, ins->inst_imm);
3953                                         } else {
3954                                                 s390_basr (code, s390_r13, 0);
3955                                                 s390_j    (code, 4);
3956                                                 s390_word (code, ins->inst_imm);
3957                                                 s390_a    (code, s390_r12, 0, s390_r13, 4);
3958                                         }
3959                                         s390_lr   (code, s390_r1, ins->sreg1);
3960                                         s390_lr   (code, s390_r13, s390_r1);
3961                                         s390_mvcle(code, s390_r0, s390_r12, 0, 0);
3962                                         s390_jo   (code, -2);
3963                                         s390_lr   (code, s390_r12, s390_r14);
3964                                 }
3965                         }
3966                 }
3967                         break;
3968                 case OP_ATOMIC_ADD_I4: {
3969                         s390_lr  (code, s390_r1, ins->sreg2);
3970                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
3971                         s390_a   (code, s390_r1, 0, ins->inst_basereg, ins->inst_offset);
3972                         s390_cs  (code, s390_r0, s390_r0, ins->inst_basereg, ins->inst_offset);
3973                         s390_jnz (code, -7);
3974                         s390_lr  (code, ins->dreg, s390_r1);
3975                 }
3976                         break;
3977                 case OP_ATOMIC_ADD_NEW_I4: {
3978                         s390_lr  (code, s390_r1, ins->sreg2);
3979                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
3980                         s390_a   (code, s390_r1, 0, ins->inst_basereg, ins->inst_offset);
3981                         s390_cs  (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
3982                         s390_jnz (code, -7);
3983                         s390_lr  (code, ins->dreg, s390_r1);
3984                 }
3985                         break;
3986                 case OP_ATOMIC_EXCHANGE_I4: {
3987                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
3988                         s390_cs  (code, s390_r0, ins->sreg2, ins->inst_basereg, ins->inst_offset);
3989                         s390_jnz (code, -4);
3990                         s390_lr  (code, ins->dreg, s390_r0);
3991                 }
3992                         break;
3993                 case OP_S390_BKCHAIN: {
3994                         s390_lr  (code, ins->dreg, ins->sreg1);
3995                         if (s390_is_imm16 (cfg->stack_offset)) {
3996                                 s390_ahi (code, ins->dreg, cfg->stack_offset);
3997                         } else {
3998                                 s390_basr (code, s390_r13, 0);
3999                                 s390_j    (code, 6);
4000                                 s390_word (code, cfg->stack_offset);
4001                                 s390_a    (code, ins->dreg, 0, s390_r13, 4);
4002                         }
4003                 }
4004                 case OP_MEMORY_BARRIER: {
4005                 }
4006                         break;
4007                 default:
4008                         g_warning ("unknown opcode %s in %s()\n", mono_inst_name (ins->opcode), __FUNCTION__);
4009                         g_assert_not_reached ();
4010                 }
4011
4012                 if ((cfg->opt & MONO_OPT_BRANCH) && ((code - cfg->native_code - offset) > max_len)) {
4013                         g_warning ("wrong maximal instruction length of instruction %s (expected %d, got %d)",
4014                                    mono_inst_name (ins->opcode), max_len, code - cfg->native_code - offset);
4015                         g_assert_not_reached ();
4016                 }
4017
4018                 cpos += max_len;
4019
4020                 last_ins = ins;
4021                 last_offset = offset;
4022
4023                 ins = ins->next;
4024         }
4025
4026         cfg->code_len = code - cfg->native_code;
4027 }
4028
4029 /*========================= End of Function ========================*/
4030
4031 /*------------------------------------------------------------------*/
4032 /*                                                                  */
4033 /* Name         - mono_arch_register_lowlevel_calls                 */
4034 /*                                                                  */
4035 /* Function     - Register routines to help with --trace operation. */
4036 /*                                                                  */
4037 /*------------------------------------------------------------------*/
4038
4039 void
4040 mono_arch_register_lowlevel_calls (void)
4041 {
4042         mono_register_jit_icall (mono_arch_break, "mono_arch_break", NULL, TRUE);
4043         mono_register_jit_icall (mono_arch_get_lmf_addr, "mono_arch_get_lmf_addr", NULL, TRUE);
4044 }
4045
4046 /*========================= End of Function ========================*/
4047
4048 /*------------------------------------------------------------------*/
4049 /*                                                                  */
4050 /* Name         - mono_arch_patch_code                              */
4051 /*                                                                  */
4052 /* Function     - Process the patch data created during the         */
4053 /*                instruction build process. This resolves jumps,   */
4054 /*                calls, variables etc.                             */
4055 /*                                                                  */
4056 /*------------------------------------------------------------------*/
4057
4058 static void
4059 mono_arch_break(void) {
4060 }
4061
4062 /*========================= End of Function ========================*/
4063
4064 /*------------------------------------------------------------------*/
4065 /*                                                                  */
4066 /* Name         - mono_arch_patch_code                              */
4067 /*                                                                  */
4068 /* Function     - Process the patch data created during the         */
4069 /*                instruction build process. This resolves jumps,   */
4070 /*                calls, variables etc.                             */
4071 /*                                                                  */
4072 /*------------------------------------------------------------------*/
4073
4074 void
4075 mono_arch_patch_code (MonoMethod *method, MonoDomain *domain,
4076                       guint8 *code, MonoJumpInfo *ji, gboolean run_cctors)
4077 {
4078         MonoJumpInfo *patch_info;
4079
4080         for (patch_info = ji; patch_info; patch_info = patch_info->next) {
4081                 unsigned char *ip = patch_info->ip.i + code;
4082                 gconstpointer target = NULL;
4083
4084                 target = mono_resolve_patch_target (method, domain, code,
4085                                                     patch_info, run_cctors);
4086
4087                 switch (patch_info->type) {
4088                         case MONO_PATCH_INFO_IP:
4089                         case MONO_PATCH_INFO_EXC_NAME:
4090                         case MONO_PATCH_INFO_LDSTR:
4091                         case MONO_PATCH_INFO_TYPE_FROM_HANDLE:
4092                         case MONO_PATCH_INFO_LDTOKEN:
4093                         case MONO_PATCH_INFO_EXC:
4094                                 continue;
4095                         case MONO_PATCH_INFO_SWITCH:
4096                                 /*----------------------------------*/
4097                                 /* ip points at the basr r13,0/j +4 */
4098                                 /* instruction the vtable value     */
4099                                 /* follows this (i.e. ip+6)         */
4100                                 /*----------------------------------*/
4101                                 *((gconstpointer *)(ip+6)) = target;
4102                                 target = NULL;
4103                                 continue;
4104                         case MONO_PATCH_INFO_METHODCONST:
4105                         case MONO_PATCH_INFO_CLASS:
4106                         case MONO_PATCH_INFO_IMAGE:
4107                         case MONO_PATCH_INFO_FIELD:
4108                         case MONO_PATCH_INFO_IID:
4109                                 target = S390_RELATIVE(target, ip);
4110                                 continue;
4111                         case MONO_PATCH_INFO_R4:
4112                         case MONO_PATCH_INFO_R8:
4113                         case MONO_PATCH_INFO_METHOD_REL:
4114                                 g_assert_not_reached ();
4115                                 continue;
4116                         default:
4117                                 target = S390_RELATIVE(target, ip);
4118                                 ip += 2;
4119                 }
4120                 s390_patch (ip, (guint32) target);
4121         }
4122 }
4123
4124 /*========================= End of Function ========================*/
4125
4126 /*------------------------------------------------------------------*/
4127 /*                                                                  */
4128 /* Name         - emit_load_volatile_registers                      */
4129 /*                                                                  */
4130 /* Function     - Create the instruction sequence for loading the   */
4131 /*                parameter registers for use with the 'tail' op.   */
4132 /*                                                                  */
4133 /*                The register loading operations performed here    */
4134 /*                are the mirror of the store operations performed  */
4135 /*                in mono_arch_emit_prolog and need to be kept in   */
4136 /*                synchronization with it.                          */
4137 /*                                                                  */
4138 /*------------------------------------------------------------------*/
4139
4140 guint8 *
4141 emit_load_volatile_registers(guint8 * code, MonoCompile *cfg)
4142 {
4143         MonoMethod *method = cfg->method;
4144         MonoMethodSignature *sig;
4145         MonoInst *inst;
4146         int pos, i;
4147         CallInfo *cinfo;
4148         size_data sz;
4149
4150         sig = mono_method_signature (method);
4151         pos = 0;
4152
4153         cinfo = calculate_sizes (sig, &sz, sig->pinvoke);
4154
4155         if (cinfo->struct_ret) {
4156                 ArgInfo *ainfo = &cinfo->ret;
4157                 inst         = cfg->ret;
4158                 s390_l (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4159         }
4160
4161         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
4162                 ArgInfo *ainfo = cinfo->args + i;
4163                 inst = cfg->varinfo [pos];
4164
4165                 if (inst->opcode == OP_REGVAR) {
4166                         if (ainfo->regtype == RegTypeGeneral)
4167                                 s390_lr (code, ainfo->reg, inst->dreg);
4168                         else if (ainfo->regtype == RegTypeFP) {
4169                                 if (inst->dreg != ainfo->reg) {
4170                                         if (ainfo->size == 4) {
4171                                                 s390_ldebr (code, ainfo->reg, inst->dreg);
4172                                         } else {
4173                                                 s390_ldr   (code, ainfo->reg, inst->dreg);
4174                                         }
4175                                 }
4176                         }
4177                         else if (ainfo->regtype == RegTypeBase) {
4178                         } else
4179                                 g_assert_not_reached ();
4180                 } else {
4181                         if (ainfo->regtype == RegTypeGeneral) {
4182                                 if (!((ainfo->reg >= 2) && (ainfo->reg <= 6)))
4183                                         g_assert_not_reached();
4184                                 switch (ainfo->size) {
4185                                 case 1:
4186                                         s390_ic (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4187                                         break;
4188                                 case 2:
4189                                         s390_lh (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4190                                         break;
4191                                 case 8:
4192                                         s390_lm (code, ainfo->reg, ainfo->reg + 1,
4193                                                   inst->inst_basereg, inst->inst_offset);
4194                                         break;
4195                                 default:
4196                                         s390_l  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4197                                 }
4198                         } else if (ainfo->regtype == RegTypeBase) {
4199                         } else if (ainfo->regtype == RegTypeFP) {
4200                                 if (ainfo->size == 8)
4201                                         s390_ld (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4202                                 else if (ainfo->size == 4)
4203                                         s390_le (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4204                                 else
4205                                         g_assert_not_reached ();
4206                         } else if (ainfo->regtype == RegTypeStructByVal) {
4207                                 if (ainfo->reg != STK_BASE) {
4208                                         switch (ainfo->size) {
4209                                         case 1:
4210                                                 s390_ic (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4211                                                 break;
4212                                         case 2:
4213                                                 s390_lh (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4214                                                 break;
4215                                         case 4:
4216                                                 s390_l  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4217                                                 break;
4218                                         case 8:
4219                                                 s390_lm (code, ainfo->reg, ainfo->reg+1, inst->inst_basereg, inst->inst_offset);
4220                                                 break;
4221                                         }
4222                                 }
4223                         } else if (ainfo->regtype == RegTypeStructByAddr) {
4224                                 if (ainfo->reg != STK_BASE) {
4225                                         s390_l  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4226                                 }
4227                         } else
4228                                 g_assert_not_reached ();
4229                 }
4230                 pos++;
4231         }
4232
4233         g_free (cinfo);
4234
4235         return code;
4236 }
4237
4238 /*========================= End of Function ========================*/
4239
4240 /*------------------------------------------------------------------*/
4241 /*                                                                  */
4242 /* Name         - mono_arch_emit_prolog                             */
4243 /*                                                                  */
4244 /* Function     - Create the instruction sequence for a function    */
4245 /*                prolog.                                           */
4246 /*                                                                  */
4247 /*------------------------------------------------------------------*/
4248
4249 guint8 *
4250 mono_arch_emit_prolog (MonoCompile *cfg)
4251 {
4252         MonoMethod *method = cfg->method;
4253         MonoBasicBlock *bb;
4254         MonoMethodSignature *sig;
4255         MonoInst *inst;
4256         int alloc_size, pos, max_offset, i;
4257         guint8 *code;
4258         CallInfo *cinfo;
4259         size_data sz;
4260         int tracing = 0;
4261         int lmfOffset;                                                          \
4262
4263         if (mono_jit_trace_calls != NULL && mono_trace_eval (method))
4264                 tracing = 1;
4265
4266         cfg->code_size   = 512;
4267         cfg->native_code = code = g_malloc (cfg->code_size);
4268
4269         s390_stm  (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
4270
4271         if (cfg->flags & MONO_CFG_HAS_ALLOCA) {
4272                 cfg->used_int_regs |= 1 << 11;
4273         }
4274
4275         alloc_size = cfg->stack_offset;
4276
4277         cfg->stack_usage = alloc_size;
4278         s390_lr   (code, s390_r11, STK_BASE);
4279         if (s390_is_uimm16 (alloc_size)) {
4280                 s390_ahi  (code, STK_BASE, -alloc_size);
4281         } else {
4282                 int stackSize = alloc_size;
4283                 while (stackSize > 32767) {
4284                         s390_ahi  (code, STK_BASE, -32767);
4285                         stackSize -= 32767;
4286                 }
4287                 s390_ahi  (code, STK_BASE, -stackSize);
4288         }
4289         s390_st   (code, s390_r11, 0, STK_BASE, 0);
4290
4291         if (cfg->frame_reg != STK_BASE)
4292                 s390_lr (code, s390_r11, STK_BASE);
4293
4294         /* compute max_offset in order to use short forward jumps
4295          * we always do it on s390 because the immediate displacement
4296          * for jumps is too small
4297          */
4298         max_offset = 0;
4299         for (bb = cfg->bb_entry; bb; bb = bb->next_bb) {
4300                 MonoInst *ins = bb->code;
4301                 bb->max_offset = max_offset;
4302
4303                 if (cfg->prof_options & MONO_PROFILE_COVERAGE)
4304                         max_offset += 6;
4305
4306                 while (ins) {
4307                         max_offset += ((guint8 *)ins_spec [ins->opcode])[MONO_INST_LEN];
4308                         ins = ins->next;
4309                 }
4310         }
4311
4312         /* load arguments allocated to register from the stack */
4313         sig = mono_method_signature (method);
4314         pos = 0;
4315
4316         cinfo = calculate_sizes (sig, &sz, sig->pinvoke);
4317
4318         if (cinfo->struct_ret) {
4319                 ArgInfo *ainfo = &cinfo->ret;
4320                 inst         = cfg->ret;
4321                 inst->unused = ainfo->vtsize;
4322                 s390_st (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4323         }
4324
4325         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
4326                 ArgInfo *ainfo = cinfo->args + i;
4327                 inst = cfg->varinfo [pos];
4328
4329                 if (inst->opcode == OP_REGVAR) {
4330                         if (ainfo->regtype == RegTypeGeneral)
4331                                 s390_lr (code, inst->dreg, ainfo->reg);
4332                         else if (ainfo->regtype == RegTypeFP) {
4333                                 if (inst->dreg != ainfo->reg) {
4334                                         if (ainfo->size == 4) {
4335                                                 s390_ledbr (code, inst->dreg, ainfo->reg);
4336                                         } else {
4337                                                 s390_ldr   (code, inst->dreg, ainfo->reg);
4338                                         }
4339                                 }
4340                         }
4341                         else if (ainfo->regtype == RegTypeBase) {
4342                                 s390_lr  (code, s390_r13, STK_BASE);
4343                                 s390_ahi (code, s390_r13, alloc_size);
4344                                 s390_l   (code, inst->dreg, 0, s390_r13, ainfo->offset);
4345                         } else
4346                                 g_assert_not_reached ();
4347
4348                         if (cfg->verbose_level > 2)
4349                                 g_print ("Argument %d assigned to register %s\n",
4350                                          pos, mono_arch_regname (inst->dreg));
4351                 } else {
4352                         if (ainfo->regtype == RegTypeGeneral) {
4353                                 if (!((ainfo->reg >= 2) && (ainfo->reg <= 6)))
4354                                         g_assert_not_reached();
4355                                 switch (ainfo->size) {
4356                                 case 1:
4357                                         s390_stc (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4358                                         break;
4359                                 case 2:
4360                                         s390_sth (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4361                                         break;
4362                                 case 8:
4363                                         s390_stm (code, ainfo->reg, ainfo->reg + 1,
4364                                                   inst->inst_basereg, inst->inst_offset);
4365                                         break;
4366                                 default:
4367                                         s390_st  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4368                                 }
4369                         } else if (ainfo->regtype == RegTypeBase) {
4370                         } else if (ainfo->regtype == RegTypeFP) {
4371                                 if (ainfo->size == 8)
4372                                         s390_std (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4373                                 else if (ainfo->size == 4)
4374                                         s390_ste (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4375                                 else
4376                                         g_assert_not_reached ();
4377                         } else if (ainfo->regtype == RegTypeStructByVal) {
4378                                 int doffset = inst->inst_offset;
4379                                 int reg;
4380                                 if (ainfo->reg != STK_BASE)
4381                                         reg = ainfo->reg;
4382                                 else {
4383                                         reg = s390_r0;
4384                                         s390_lr  (code, s390_r13, STK_BASE);
4385                                         s390_ahi (code, s390_r13, alloc_size);
4386                                 }
4387                                 switch (ainfo->size) {
4388                                         case 1:
4389                                                 if (ainfo->reg == STK_BASE)
4390                                                         s390_ic  (code, reg, 0, s390_r13, ainfo->offset+3);
4391                                                 s390_stc (code, reg, 0, inst->inst_basereg, doffset);
4392                                                 break;
4393                                         case 2:
4394                                                 if (ainfo->reg == STK_BASE)
4395                                                         s390_lh  (code, reg, 0, s390_r13, ainfo->offset+2);
4396                                                 s390_sth (code, reg, 0, inst->inst_basereg, doffset);
4397                                                 break;
4398                                         case 4:
4399                                                 if (ainfo->reg == STK_BASE)
4400                                                         s390_l   (code, reg, 0, s390_r13, ainfo->offset);
4401                                                 s390_st  (code, reg, 0, inst->inst_basereg, doffset);
4402                                                 break;
4403                                         case 8:
4404                                                 if (ainfo->reg == STK_BASE)
4405                                                         s390_lm  (code, s390_r0, s390_r1, s390_r13, ainfo->offset);
4406                                                 s390_stm (code, reg, reg+1, inst->inst_basereg, doffset);
4407                                                 break;
4408                                 }
4409                         } else if (ainfo->regtype == RegTypeStructByAddr) {
4410                                 if (ainfo->reg != STK_BASE)
4411                                         s390_st  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4412                         } else
4413                                 g_assert_not_reached ();
4414                 }
4415                 pos++;
4416         }
4417
4418         if (method->save_lmf) {
4419                 /*---------------------------------------------------------------*/
4420                 /* we build the MonoLMF structure on the stack - see mini-s390.h */
4421                 /*---------------------------------------------------------------*/
4422                 lmfOffset = alloc_size - sizeof(MonoLMF);
4423
4424                 s390_lr    (code, s390_r13, cfg->frame_reg);
4425                 if (s390_is_uimm16(lmfOffset))
4426                         s390_ahi   (code, s390_r13, lmfOffset);
4427                 else {
4428                         s390_basr (code, s390_r14, 0);
4429                         s390_j    (code, 4);
4430                         s390_word (code, lmfOffset);
4431                         s390_a    (code, s390_r13, 0, s390_r14, 4);
4432                 }
4433
4434                 /*---------------------------------------------------------------*/
4435                 /* Preserve the parameter registers while we fix up the lmf      */
4436                 /*---------------------------------------------------------------*/
4437                 s390_stm   (code, s390_r2, s390_r6, s390_r13,
4438                             G_STRUCT_OFFSET(MonoLMF, pregs[0]));
4439
4440                 /*---------------------------------------------------------------*/
4441                 /* On return from this call r2 have the address of the &lmf      */
4442                 /*---------------------------------------------------------------*/
4443                 mono_add_patch_info (cfg, code - cfg->native_code,
4444                                      MONO_PATCH_INFO_INTERNAL_METHOD,
4445                                      (gpointer)"mono_get_lmf_addr");
4446                 s390_brasl (code, s390_r14, 0);
4447
4448                 /*---------------------------------------------------------------*/
4449                 /* Set lmf.lmf_addr = jit_tls->lmf                               */
4450                 /*---------------------------------------------------------------*/
4451                 s390_st    (code, s390_r2, 0, s390_r13,
4452                             G_STRUCT_OFFSET(MonoLMF, lmf_addr));
4453
4454                 /*---------------------------------------------------------------*/
4455                 /* Get current lmf                                               */
4456                 /*---------------------------------------------------------------*/
4457                 s390_l     (code, s390_r0, 0, s390_r2, 0);
4458
4459                 /*---------------------------------------------------------------*/
4460                 /* Set our lmf as the current lmf                                */
4461                 /*---------------------------------------------------------------*/
4462                 s390_st    (code, s390_r13, 0, s390_r2, 0);
4463
4464                 /*---------------------------------------------------------------*/
4465                 /* Have our lmf.previous_lmf point to the last lmf               */
4466                 /*---------------------------------------------------------------*/
4467                 s390_st    (code, s390_r0, 0, s390_r13,
4468                             G_STRUCT_OFFSET(MonoLMF, previous_lmf));
4469
4470                 /*---------------------------------------------------------------*/
4471                 /* save method info                                              */
4472                 /*---------------------------------------------------------------*/
4473                 s390_basr  (code, s390_r1, 0);
4474                 s390_j     (code, 4);
4475                 s390_word  (code, method);
4476                 s390_l     (code, s390_r1, 0, s390_r1, 4);
4477                 s390_st    (code, s390_r1, 0, s390_r13,
4478                             G_STRUCT_OFFSET(MonoLMF, method));
4479
4480                 /*---------------------------------------------------------------*/
4481                 /* save the current IP                                           */
4482                 /*---------------------------------------------------------------*/
4483                 s390_st    (code, STK_BASE, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, ebp));
4484                 s390_basr  (code, s390_r1, 0);
4485                 s390_la    (code, s390_r1, 0, s390_r1, 0);
4486                 s390_st    (code, s390_r1, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, eip));
4487
4488                 /*---------------------------------------------------------------*/
4489                 /* Save general and floating point registers                     */
4490                 /*---------------------------------------------------------------*/
4491                 s390_stm   (code, s390_r2, s390_r12, s390_r13,
4492                             G_STRUCT_OFFSET(MonoLMF, gregs[2]));
4493                 for (i = 0; i < 16; i++) {
4494                         s390_std  (code, i, 0, s390_r13,
4495                                    G_STRUCT_OFFSET(MonoLMF, fregs[i]));
4496                 }
4497
4498                 /*---------------------------------------------------------------*/
4499                 /* Restore the parameter registers now that we've set up the lmf */
4500                 /*---------------------------------------------------------------*/
4501                 s390_lm    (code, s390_r2, s390_r6, s390_r13,
4502                             G_STRUCT_OFFSET(MonoLMF, pregs[0]));
4503         }
4504
4505         if (tracing)
4506                 code = mono_arch_instrument_prolog(cfg, enter_method, code, TRUE);
4507
4508         cfg->code_len = code - cfg->native_code;
4509         g_free (cinfo);
4510
4511         return code;
4512 }
4513
4514 /*========================= End of Function ========================*/
4515
4516 /*------------------------------------------------------------------*/
4517 /*                                                                  */
4518 /* Name         - mono_arch_emit_epilog                             */
4519 /*                                                                  */
4520 /* Function     - Emit the instructions for a function epilog.      */
4521 /*                                                                  */
4522 /*------------------------------------------------------------------*/
4523
4524 void
4525 mono_arch_emit_epilog (MonoCompile *cfg)
4526 {
4527         MonoMethod *method = cfg->method;
4528         int tracing = 0;
4529         guint8 *code;
4530         int max_epilog_size = 96;
4531
4532         if (cfg->method->save_lmf)
4533                 max_epilog_size += 128;
4534
4535         if (mono_jit_trace_calls != NULL)
4536                 max_epilog_size += 128;
4537
4538         if (cfg->prof_options & MONO_PROFILE_ENTER_LEAVE)
4539                 max_epilog_size += 128;
4540
4541         while ((cfg->code_len + max_epilog_size) > (cfg->code_size - 16)) {
4542                 cfg->code_size  *= 2;
4543                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
4544                 mono_jit_stats.code_reallocs++;
4545         }
4546
4547         code = cfg->native_code + cfg->code_len;
4548
4549         if (mono_jit_trace_calls != NULL && mono_trace_eval (method)) {
4550                 code = mono_arch_instrument_epilog (cfg, leave_method, code, TRUE);
4551                 tracing = 1;
4552         }
4553
4554         if (method->save_lmf)
4555                 restoreLMF(code, cfg->frame_reg, cfg->stack_usage);
4556
4557         if (cfg->flags & MONO_CFG_HAS_ALLOCA)
4558                 s390_l (code, STK_BASE, 0, STK_BASE, 0);
4559         else
4560                 code = backUpStackPtr(cfg, code, STK_BASE);
4561
4562         s390_lm  (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
4563         s390_br  (code, s390_r14);
4564
4565         cfg->code_len = code - cfg->native_code;
4566
4567         g_assert (cfg->code_len < cfg->code_size);
4568
4569 }
4570
4571 /*========================= End of Function ========================*/
4572
4573 /*------------------------------------------------------------------*/
4574 /*                                                                  */
4575 /* Name         - mono_arch_emit_exceptions                         */
4576 /*                                                                  */
4577 /* Function     - Emit the blocks to handle exception conditions.   */
4578 /*                                                                  */
4579 /*------------------------------------------------------------------*/
4580
4581 void
4582 mono_arch_emit_exceptions (MonoCompile *cfg)
4583 {
4584         MonoJumpInfo    *patch_info;
4585         guint8          *code;
4586         int             nThrows = 0,
4587                         exc_count = 0,
4588                         iExc;
4589         guint32         code_size;
4590         MonoClass       *exc_classes [MAX_EXC];
4591         guint8          *exc_throw_start [MAX_EXC],
4592                         *exc_throw_end [MAX_EXC];
4593
4594         for (patch_info = cfg->patch_info;
4595              patch_info;
4596              patch_info = patch_info->next) {
4597                 if (patch_info->type == MONO_PATCH_INFO_EXC)
4598                         exc_count++;
4599         }
4600
4601         code_size = exc_count * 26;
4602
4603         while ((cfg->code_len + code_size) > (cfg->code_size - 16)) {
4604                 cfg->code_size  *= 2;
4605                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
4606                 mono_jit_stats.code_reallocs++;
4607         }
4608
4609         code = cfg->native_code + cfg->code_len;
4610
4611         /*---------------------------------------------------------------------*/
4612         /* Add code to raise exceptions                                        */
4613         /*---------------------------------------------------------------------*/
4614         for (patch_info = cfg->patch_info; patch_info; patch_info = patch_info->next) {
4615                 switch (patch_info->type) {
4616                 case MONO_PATCH_INFO_EXC: {
4617                         guint8 *ip = patch_info->ip.i + cfg->native_code;
4618                         MonoClass *exc_class;
4619                         guint32 throw_ip;
4620
4621                         /*-----------------------------------------------------*/
4622                         /* Patch the branch in epilog to come here             */
4623                         /*-----------------------------------------------------*/
4624                         s390_patch (ip + 2, (guint32) (S390_RELATIVE(code,ip)));
4625
4626                         exc_class = mono_class_from_name (mono_defaults.corlib,
4627                                                           "System",
4628                                                           patch_info->data.name);
4629                         g_assert (exc_class);
4630                         throw_ip = patch_info->ip.i;
4631
4632                         for (iExc = 0; iExc < nThrows; ++iExc)
4633                                 if (exc_classes [iExc] == exc_class)
4634                                         break;
4635
4636                         if (iExc < nThrows) {
4637                                 s390_jcl (code, S390_CC_UN, (guint32) exc_throw_start [iExc]);
4638                                 patch_info->type = MONO_PATCH_INFO_NONE;
4639                         } else {
4640
4641                                 if (nThrows < MAX_EXC) {
4642                                         exc_classes [nThrows]     = exc_class;
4643                                         exc_throw_start [nThrows] = code;
4644                                 }
4645
4646                                 /*---------------------------------------------*/
4647                                 /* Patch the parameter passed to the handler   */
4648                                 /*---------------------------------------------*/
4649                                 s390_basr (code, s390_r13, 0);
4650                                 s390_j    (code, 4);
4651                                 s390_word (code, patch_info->data.target);
4652                                 /*---------------------------------------------*/
4653                                 /* Load return address & parameter register    */
4654                                 /*---------------------------------------------*/
4655                                 s390_larl (code, s390_r14, S390_RELATIVE((patch_info->ip.i +
4656                                                            cfg->native_code + 8), code));
4657                                 s390_l    (code, s390_r2, 0, s390_r13, 4);
4658                                 /*---------------------------------------------*/
4659                                 /* Reuse the current patch to set the jump     */
4660                                 /*---------------------------------------------*/
4661                                 patch_info->type      = MONO_PATCH_INFO_INTERNAL_METHOD;
4662                                 patch_info->data.name = "mono_arch_throw_exception_by_name";
4663                                 patch_info->ip.i      = code - cfg->native_code;
4664                                 s390_jcl  (code, S390_CC_UN, 0);
4665                         }
4666                         break;
4667                 }
4668                 default:
4669                         /* do nothing */
4670                         break;
4671                 }
4672         }
4673
4674         cfg->code_len = code - cfg->native_code;
4675
4676         g_assert (cfg->code_len < cfg->code_size);
4677
4678 }
4679
4680 /*========================= End of Function ========================*/
4681
4682 /*------------------------------------------------------------------*/
4683 /*                                                                  */
4684 /* Name         - mono_arch_setup_jit_tls_data                      */
4685 /*                                                                  */
4686 /* Function     - Setup the JIT's Thread Level Specific Data.       */
4687 /*                                                                  */
4688 /*------------------------------------------------------------------*/
4689
4690 void
4691 mono_arch_setup_jit_tls_data (MonoJitTlsData *tls)
4692 {
4693
4694         if (!tls_offset_inited) {
4695                 tls_offset_inited = TRUE;
4696
4697 #if HAVE_KW_THREAD
4698 # if 0
4699         __asm__ ("\tear\t%r1,0\n"
4700                  "\tlr\t%0,%3\n"
4701                  "\tsr\t%0,%r1\n"
4702                  "\tlr\t%1,%4\n"
4703                  "\tsr\t%1,%r1\n"
4704                  "\tlr\t%2,%5\n"
4705                  "\tsr\t%2,%r1\n"
4706                  : "=r" (appdomain_tls_offset),
4707                    "=r" (thread_tls_offset),
4708                    "=r" (lmf_tls_offset)
4709                  : "r" (&tls_appdomain),
4710                    "r" (&tls_current_object),
4711                    "r" (&mono_lmf_addr)
4712                  : "1", "cc");
4713 # endif
4714 #endif
4715         }
4716
4717         if (!lmf_addr_key_inited) {
4718                 lmf_addr_key_inited = TRUE;
4719                 pthread_key_create (&lmf_addr_key, NULL);
4720         }
4721         pthread_setspecific (lmf_addr_key, &tls->lmf);
4722
4723 }
4724
4725 /*========================= End of Function ========================*/
4726
4727 /*------------------------------------------------------------------*/
4728 /*                                                                  */
4729 /* Name         - mono_arch_free_jit_tls_data                       */
4730 /*                                                                  */
4731 /* Function     - Free tls data.                                    */
4732 /*                                                                  */
4733 /*------------------------------------------------------------------*/
4734
4735 void
4736 mono_arch_free_jit_tls_data (MonoJitTlsData *tls)
4737 {
4738
4739 }
4740
4741 /*========================= End of Function ========================*/
4742
4743 /*------------------------------------------------------------------*/
4744 /*                                                                  */
4745 /* Name         - mono_arch_emit_this_vret_args                     */
4746 /*                                                                  */
4747 /* Function     -                                                   */
4748 /*                                                                  */
4749 /*------------------------------------------------------------------*/
4750
4751 void
4752 mono_arch_emit_this_vret_args (MonoCompile *cfg, MonoCallInst *inst, int this_reg, int this_type, int vt_reg)
4753 {
4754         int this_dreg = s390_r2;
4755
4756         if (vt_reg != -1)
4757                 this_dreg = s390_r3;
4758
4759         /* add the this argument */
4760         if (this_reg != -1) {
4761                 MonoInst *this;
4762                 MONO_INST_NEW (cfg, this, OP_SETREG);
4763                 this->type  = this_type;
4764                 this->sreg1 = this_reg;
4765                 this->dreg  = mono_regstate_next_int (cfg->rs);
4766                 mono_bblock_add_inst (cfg->cbb, this);
4767                 mono_call_inst_add_outarg_reg (inst, this->dreg, this_dreg, FALSE);
4768         }
4769
4770         if (vt_reg != -1) {
4771                 MonoInst *vtarg;
4772                 MONO_INST_NEW (cfg, vtarg, OP_SETREG);
4773                 vtarg->type  = STACK_MP;
4774                 vtarg->sreg1 = vt_reg;
4775                 vtarg->dreg  = mono_regstate_next_int (cfg->rs);
4776                 mono_bblock_add_inst (cfg->cbb, vtarg);
4777                 mono_call_inst_add_outarg_reg (inst, vtarg->dreg, s390_r2, FALSE);
4778         }
4779 }
4780
4781 /*========================= End of Function ========================*/
4782
4783 /*------------------------------------------------------------------*/
4784 /*                                                                  */
4785 /* Name         - mono_arch_get_inst_for_method                   */
4786 /*                                                                  */
4787 /* Function     - Check for opcodes we can handle directly in       */
4788 /*                hardware.                                         */
4789 /*                                                                  */
4790 /*------------------------------------------------------------------*/
4791
4792 MonoInst*
4793 mono_arch_get_inst_for_method (MonoCompile *cfg, MonoMethod *cmethod,
4794                                MonoMethodSignature *fsig, MonoInst **args)
4795 {
4796         MonoInst *ins = NULL;
4797
4798         if (cmethod->klass == mono_defaults.math_class) {
4799                 if (strcmp (cmethod->name, "Sqrt") == 0) {
4800                         MONO_INST_NEW (cfg, ins, OP_SQRT);
4801                         ins->inst_i0 = args [0];
4802                 }
4803         } else if (cmethod->klass == mono_defaults.thread_class &&
4804                            strcmp (cmethod->name, "MemoryBarrier") == 0) {
4805                 MONO_INST_NEW (cfg, ins, OP_MEMORY_BARRIER);
4806         } else if(cmethod->klass->image == mono_defaults.corlib &&
4807                            (strcmp (cmethod->klass->name_space, "System.Threading") == 0) &&
4808                            (strcmp (cmethod->klass->name, "Interlocked") == 0)) {
4809
4810                 if (strcmp (cmethod->name, "Increment") == 0 &&
4811                     fsig->params [0]->type == MONO_TYPE_I4) {
4812                         MonoInst *ins_iconst;
4813
4814                         MONO_INST_NEW (cfg, ins, OP_ATOMIC_ADD_NEW_I4);
4815                         MONO_INST_NEW (cfg, ins_iconst, OP_ICONST);
4816                         ins_iconst->inst_c0 = 1;
4817
4818                         ins->inst_i0 = args [0];
4819                         ins->inst_i1 = ins_iconst;
4820                 } else if (strcmp (cmethod->name, "Decrement") == 0 &&
4821                            fsig->params [0]->type == MONO_TYPE_I4) {
4822                         MonoInst *ins_iconst;
4823
4824                         MONO_INST_NEW (cfg, ins, OP_ATOMIC_ADD_NEW_I4);
4825                         MONO_INST_NEW (cfg, ins_iconst, OP_ICONST);
4826                         ins_iconst->inst_c0 = -1;
4827
4828                         ins->inst_i0 = args [0];
4829                         ins->inst_i1 = ins_iconst;
4830                 } else if (strcmp (cmethod->name, "Exchange") == 0 &&
4831                            fsig->params [0]->type == MONO_TYPE_I4) {
4832                         MONO_INST_NEW (cfg, ins, OP_ATOMIC_EXCHANGE_I4);
4833
4834                         ins->inst_i0 = args [0];
4835                         ins->inst_i1 = args [1];
4836                 } else if (strcmp (cmethod->name, "Add") == 0 &&
4837                            fsig->params [0]->type == MONO_TYPE_I4) {
4838                         MONO_INST_NEW (cfg, ins, OP_ATOMIC_ADD_I4);
4839
4840                         ins->inst_i0 = args [0];
4841                         ins->inst_i1 = args [1];
4842                 }
4843         }
4844         return ins;
4845 }
4846
4847 /*========================= End of Function ========================*/
4848
4849 /*------------------------------------------------------------------*/
4850 /*                                                                  */
4851 /* Name         - mono_arch_print_tree                              */
4852 /*                                                                  */
4853 /* Function     - Print platform-specific opcode details.           */
4854 /*                                                                  */
4855 /* Returns      - 1 - opcode details have been printed              */
4856 /*                0 - opcode details have not been printed          */
4857 /*                                                                  */
4858 /*------------------------------------------------------------------*/
4859
4860 gboolean
4861 mono_arch_print_tree (MonoInst *tree, int arity)
4862 {
4863         gboolean done;
4864
4865         switch (tree->opcode) {
4866                 case OP_S390_LOADARG:
4867                 case OP_S390_ARGREG:
4868                 case OP_S390_ARGPTR:
4869                         printf ("[0x%lx(%s)]", tree->inst_offset,
4870                                 mono_arch_regname (tree->inst_basereg));
4871                         done = 1;
4872                         break;
4873                 case OP_S390_STKARG:
4874                         printf ("[0x%lx(previous_frame)]",
4875                                 tree->inst_offset);
4876                         done = 1;
4877                         break;
4878                 case OP_S390_MOVE:
4879                         printf ("[0x%lx(%d,%s),0x%lx(%s)]",
4880                                 tree->inst_offset, tree->unused,
4881                                 mono_arch_regname(tree->dreg), tree->inst_imm,
4882                                 mono_arch_regname(tree->sreg1));
4883                         done = 1;
4884                         break;
4885                 case OP_S390_SETF4RET:
4886                         printf ("[f%ld,f%ld]",
4887                                 mono_arch_regname (tree->dreg),
4888                                 mono_arch_regname (tree->sreg1));
4889                         done = 1;
4890                         break;
4891                 case OP_TLS_GET:
4892                         printf ("[0x%lx(0x%lx,%s)]", tree->inst_offset,
4893                                 tree->inst_imm,
4894                                 mono_arch_regname (tree->sreg1));
4895                         done = 1;
4896                         break;
4897                 case OP_S390_BKCHAIN:
4898                         printf ("[previous_frame(%s)]",
4899                                 mono_arch_regname (tree->sreg1));
4900                         done = 1;
4901                         break;
4902                 default:
4903                         done = 0;
4904         }
4905         return (done);
4906 }
4907
4908 /*========================= End of Function ========================*/
4909
4910 /*------------------------------------------------------------------*/
4911 /*                                                                  */
4912 /* Name         - mono_arch_regalloc_cost                           */
4913 /*                                                                  */
4914 /* Function     - Determine the cost, in the number of memory       */
4915 /*                references, of the action of allocating the var-  */
4916 /*                iable VMV into a register during global register  */
4917 /*                allocation.                                       */
4918 /*                                                                  */
4919 /* Returns      - Cost                                              */
4920 /*                                                                  */
4921 /*------------------------------------------------------------------*/
4922
4923 guint32
4924 mono_arch_regalloc_cost (MonoCompile *cfg, MonoMethodVar *vmv)
4925 {
4926         /* FIXME: */
4927         return 2;
4928 }
4929
4930 /*========================= End of Function ========================*/
4931
4932 /*------------------------------------------------------------------*/
4933 /*                                                                  */
4934 /* Name         - mono_arch_get_domain_intrinsic                    */
4935 /*                                                                  */
4936 /* Function     -                                                   */
4937 /*                                                                  */
4938 /* Returns      -                                                   */
4939 /*                                                                  */
4940 /*------------------------------------------------------------------*/
4941
4942 MonoInst *
4943 mono_arch_get_domain_intrinsic (MonoCompile* cfg)
4944 {
4945         MonoInst *ins;
4946
4947         if (appdomain_tls_offset == -1)
4948                 return NULL;
4949
4950         MONO_INST_NEW (cfg, ins, OP_TLS_GET);
4951         ins->inst_offset = appdomain_tls_offset;
4952         return (ins);
4953 }
4954
4955 /*========================= End of Function ========================*/
4956
4957 /*------------------------------------------------------------------*/
4958 /*                                                                  */
4959 /* Name         - mono_arch_get_thread_intrinsic                    */
4960 /*                                                                  */
4961 /* Function     -                                                   */
4962 /*                                                                  */
4963 /* Returns      -                                                   */
4964 /*                                                                  */
4965 /*------------------------------------------------------------------*/
4966
4967 MonoInst *
4968 mono_arch_get_thread_intrinsic (MonoCompile* cfg)
4969 {
4970         MonoInst *ins;
4971
4972         if (thread_tls_offset == -1)
4973                 return NULL;
4974
4975         MONO_INST_NEW (cfg, ins, OP_TLS_GET);
4976         ins->inst_offset = thread_tls_offset;
4977         return (ins);
4978 }
4979
4980 /*========================= End of Function ========================*/
4981
4982 /*------------------------------------------------------------------*/
4983 /*                                                                  */
4984 /* Name         - mono_arch_flush_register_windows                  */
4985 /*                                                                  */
4986 /* Function     -                                                   */
4987 /*                                                                  */
4988 /* Returns      -                                                   */
4989 /*                                                                  */
4990 /*------------------------------------------------------------------*/
4991
4992 void
4993 mono_arch_flush_register_windows (void)
4994 {
4995 }
4996
4997 /*========================= End of Function ========================*/
4998
4999 /*------------------------------------------------------------------*/
5000 /*                                                                  */
5001 /* Name         - mono_arch_get_lmf_addr                            */
5002 /*                                                                  */
5003 /* Function     -                                                   */
5004 /*                                                                  */
5005 /* Returns      -                                                   */
5006 /*                                                                  */
5007 /*------------------------------------------------------------------*/
5008
5009 gpointer
5010 mono_arch_get_lmf_addr (void)
5011 {
5012         return pthread_getspecific (lmf_addr_key);
5013 }
5014
5015
5016 /*========================= End of Function ========================*/