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         int lastgr;
 225         guint32 stack_usage;
 226         guint32 struct_ret;
 227         ArgInfo ret;
 228         ArgInfo sigCookie;
 229         ArgInfo args [1];
 230 } CallInfo;
 231
 232 typedef struct {
 233         gint32  gr[5];          /* R2-R6                            */
 234         gdouble fp[3];          /* F0-F2                            */
 235 } __attribute__ ((packed)) RegParm;
 236
 237 /*========================= End of Typedefs ========================*/
 238
 239 /*------------------------------------------------------------------*/
 240 /*                   P r o t o t y p e s                            */
 241 /*------------------------------------------------------------------*/
 242
 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 static void emit_sig_cookie (MonoCompile *, MonoCallInst *, CallInfo *, int);
 259
 260 /*========================= End of Prototypes ======================*/
 261
 262 /*------------------------------------------------------------------*/
 263 /*                 G l o b a l   V a r i a b l e s                  */
 264 /*------------------------------------------------------------------*/
 265
 266 int mono_exc_esp_offset = 0;
 267
 268 static int indent_level = 0;
 269
 270 static gboolean tls_offset_inited = FALSE;
 271
 272 static int appdomain_tls_offset = -1,
 273            lmf_tls_offset = -1,
 274            thread_tls_offset = -1;
 275
 276 pthread_key_t lmf_addr_key;
 277
 278 gboolean lmf_addr_key_inited = FALSE;
 279
 280 #if 0
 281
 282 extern __thread MonoDomain *tls_appdomain;
 283 extern __thread MonoThread *tls_current_object;
 284 extern __thread gpointer   mono_lmf_addr;
 285
 286 #endif
 287
 288 /*====================== End of Global Variables ===================*/
 289
 290 /*------------------------------------------------------------------*/
 291 /*                                                                  */
 292 /* Name         - mono_arch_regname                                 */
 293 /*                                                                  */
 294 /* Function     - Returns the name of the register specified by     */
 295 /*                the input parameter.                              */
 296 /*                                                                  */
 297 /*------------------------------------------------------------------*/
 298
 299 const char*
 300 mono_arch_regname (int reg) {
 301         static const char * rnames[] = {
 302                 "s390_r0", "s390_sp", "s390_r2", "s390_r3", "s390_r4",
 303                 "s390_r5", "s390_r6", "s390_r7", "s390_r8", "s390_r9",
 304                 "s390_r10", "s390_r11", "s390_r12", "s390_r13", "s390_r14",
 305                 "s390_r15"
 306         };
 307
 308         if (reg >= 0 && reg < 16)
 309                 return rnames [reg];
 310         else
 311                 return "unknown";
 312 }
 313
 314 /*========================= End of Function ========================*/
 315
 316 /*------------------------------------------------------------------*/
 317 /*                                                                  */
 318 /* Name         - mono_arch_fregname                                */
 319 /*                                                                  */
 320 /* Function     - Returns the name of the register specified by     */
 321 /*                the input parameter.                              */
 322 /*                                                                  */
 323 /*------------------------------------------------------------------*/
 324
 325 const char*
 326 mono_arch_fregname (int reg) {
 327         static const char * rnames[] = {
 328                 "s390_f0", "s390_f1", "s390_f2", "s390_f3", "s390_f4",
 329                 "s390_f5", "s390_f6", "s390_f7", "s390_f8", "s390_f9",
 330                 "s390_f10", "s390_f11", "s390_f12", "s390_f13", "s390_f14",
 331                 "s390_f15"
 332         };
 333
 334         if (reg >= 0 && reg < 16)
 335                 return rnames [reg];
 336         else
 337                 return "unknown";
 338 }
 339
 340 /*========================= End of Function ========================*/
 341
 342 /*------------------------------------------------------------------*/
 343 /*                                                                  */
 344 /* Name         - arch_get_argument_info                            */
 345 /*                                                                  */
 346 /* Function     - Gathers information on parameters such as size,   */
 347 /*                alignment, and padding. arg_info should be large  */
 348 /*                enough to hold param_count + 1 entries.           */
 349 /*                                                                  */
 350 /* Parameters   - @csig - Method signature                          */
 351 /*                @param_count - No. of parameters to consider      */
 352 /*                @arg_info - An array to store the result info     */
 353 /*                                                                  */
 354 /* Returns      - Size of the activation frame                      */
 355 /*                                                                  */
 356 /*------------------------------------------------------------------*/
 357
 358 int
 359 mono_arch_get_argument_info (MonoMethodSignature *csig,
 360                              int param_count,
 361                              MonoJitArgumentInfo *arg_info)
 362 {
 363         int k, frame_size = 0;
 364         int size, align, pad;
 365         int offset = 8;
 366
 367         if (MONO_TYPE_ISSTRUCT (csig->ret)) {
 368                 frame_size += sizeof (gpointer);
 369                 offset += 4;
 370         }
 371
 372         arg_info [0].offset = offset;
 373
 374         if (csig->hasthis) {
 375                 frame_size += sizeof (gpointer);
 376                 offset += 4;
 377         }
 378
 379         arg_info [0].size = frame_size;
 380
 381         for (k = 0; k < param_count; k++) {
 382
 383                 if (csig->pinvoke)
 384                         size = mono_type_native_stack_size (csig->params [k], &align);
 385                 else
 386                         size = mono_type_stack_size (csig->params [k], &align);
 387
 388                 frame_size += pad = (align - (frame_size & (align - 1))) & (align - 1);
 389                 arg_info [k].pad = pad;
 390                 frame_size += size;
 391                 arg_info [k + 1].pad = 0;
 392                 arg_info [k + 1].size = size;
 393                 offset += pad;
 394                 arg_info [k + 1].offset = offset;
 395                 offset += size;
 396         }
 397
 398         align = MONO_ARCH_FRAME_ALIGNMENT;
 399         frame_size += pad = (align - (frame_size & (align - 1))) & (align - 1);
 400         arg_info [k].pad = pad;
 401
 402         return frame_size;
 403 }
 404
 405 /*========================= End of Function ========================*/
 406
 407 /*------------------------------------------------------------------*/
 408 /*                                                                  */
 409 /* Name         - retFitsInReg.                                     */
 410 /*                                                                  */
 411 /* Function     - Determines if a value can be returned in one or   */
 412 /*                two registers.                                    */
 413 /*                                                                  */
 414 /*------------------------------------------------------------------*/
 415
 416 static inline gboolean
 417 retFitsInReg(guint32 size)
 418 {
 419         switch (size) {
 420                 case 0:
 421                 case 1:
 422                 case 2:
 423                 case 4:
 424                 case 8:
 425                         return (TRUE);
 426                 break;
 427                 default:
 428                         return (FALSE);
 429         }
 430 }
 431
 432 /*========================= End of Function ========================*/
 433
 434 /*------------------------------------------------------------------*/
 435 /*                                                                  */
 436 /* Name         - backStackPtr.                                     */
 437 /*                                                                  */
 438 /* Function     - Restore Stack Pointer to previous frame.          */
 439 /*                                                                  */
 440 /*------------------------------------------------------------------*/
 441
 442 static inline guint8 *
 443 backUpStackPtr(MonoCompile *cfg, guint8 *code, gint framePtr)
 444 {
 445         int stackSize = cfg->stack_usage;
 446
 447         if (s390_is_uimm16 (cfg->stack_usage)) {
 448                 s390_ahi  (code, framePtr, cfg->stack_usage);
 449         } else {
 450                 while (stackSize > 32767) {
 451                         s390_ahi  (code, framePtr, 32767);
 452                         stackSize -= 32767;
 453                 }
 454                 s390_ahi  (code, framePtr, stackSize);
 455         }
 456         return (code);
 457 }
 458
 459 /*========================= End of Function ========================*/
 460
 461 /*------------------------------------------------------------------*/
 462 /*                                                                  */
 463 /* Name         - indent                                            */
 464 /*                                                                  */
 465 /* Function     - Perform nice indenting to current level           */
 466 /*                                                                  */
 467 /*------------------------------------------------------------------*/
 468
 469 static void
 470 indent (int diff) {
 471         int v;
 472         if (diff < 0)
 473                 indent_level += diff;
 474         v = indent_level;
 475         printf("[%3d] ",v);
 476         while (v-- > 0) {
 477                 printf (". ");
 478         }
 479         if (diff > 0)
 480                 indent_level += diff;
 481 }
 482
 483 /*========================= End of Function ========================*/
 484
 485 /*------------------------------------------------------------------*/
 486 /*                                                                  */
 487 /* Name         - decodeParm                                        */
 488 /*                                                                  */
 489 /* Function     - Decode a parameter for the trace.                 */
 490 /*                                                                  */
 491 /*------------------------------------------------------------------*/
 492
 493 static void
 494 decodeParm(MonoType *type, void *curParm, int size)
 495 {
 496         guint32 simpleType;
 497
 498         if (type->byref) {
 499                 printf("[BYREF:%p], ", *((char **) curParm));
 500         } else {
 501                 simpleType = mono_type_get_underlying_type(type)->type;
 502 enum_parmtype:
 503                 switch (simpleType) {
 504                         case MONO_TYPE_I :
 505                                 printf ("[INTPTR:%p], ", *((int **) curParm));
 506                                 break;
 507                         case MONO_TYPE_U :
 508                                 printf ("[UINTPTR:%p], ", *((int **) curParm));
 509                                 break;
 510                         case MONO_TYPE_BOOLEAN :
 511                                 printf ("[BOOL:%d], ", *((int *) curParm));
 512                                 break;
 513                         case MONO_TYPE_CHAR :
 514                                 printf ("[CHAR:%c], ", *((int *) curParm));
 515                                 break;
 516                         case MONO_TYPE_I1 :
 517                                 printf ("[INT1:%d], ", *((int *) curParm));
 518                                 break;
 519                         case MONO_TYPE_I2 :
 520                                 printf ("[INT2:%d], ", *((int *) curParm));
 521                                 break;
 522                         case MONO_TYPE_I4 :
 523                                 printf ("[INT4:%d], ", *((int *) curParm));
 524                                 break;
 525                         case MONO_TYPE_U1 :
 526                                 printf ("[UINT1:%u], ", *((unsigned int *) curParm));
 527                                 break;
 528                         case MONO_TYPE_U2 :
 529                                 printf ("[UINT2:%u], ", *((guint16 *) curParm));
 530                                 break;
 531                         case MONO_TYPE_U4 :
 532                                 printf ("[UINT4:%u], ", *((guint32 *) curParm));
 533                                 break;
 534                         case MONO_TYPE_U8 :
 535                                 printf ("[UINT8:%llu], ", *((guint64 *) curParm));
 536                                 break;
 537                         case MONO_TYPE_STRING : {
 538                                 MonoString *s = *((MonoString **) curParm);
 539                                 if (s) {
 540                                         g_assert (((MonoObject *) s)->vtable->klass == mono_defaults.string_class);
 541                                         printf("[STRING:%p:%s], ", s, mono_string_to_utf8(s));
 542                                 } else {
 543                                         printf("[STRING:null], ");
 544                                 }
 545                                 break;
 546                         }
 547                         case MONO_TYPE_CLASS :
 548                         case MONO_TYPE_OBJECT : {
 549                                 MonoObject *obj = *((MonoObject **) curParm);
 550                                 MonoClass *class;
 551                                 if ((obj) && (obj->vtable)) {
 552                                         printf("[CLASS/OBJ:");
 553                                         class = obj->vtable->klass;
 554                                         printf("%p [%p] ",obj,curParm);
 555 //                                      if (class == mono_defaults.string_class) {
 556 //                                              printf("[STRING:%p:%s]",
 557 //                                                     *obj, mono_string_to_utf8 (obj));
 558 //                                      } else if (class == mono_defaults.int32_class) {
 559 //                                              printf("[INT32:%p:%d]",
 560 //                                                      obj, *(gint32 *)((char *)obj + sizeof (MonoObject)));
 561 //                                      } else
 562 //                                              printf("[%s.%s:%p]",
 563 //                                                     class->name_space, class->name, obj);
 564                                         printf("], ");
 565                                 } else {
 566                                         printf("[OBJECT:null], ");
 567                                 }
 568                                 break;
 569                         }
 570                         case MONO_TYPE_PTR :
 571                                 printf("[PTR:%p], ", *((gpointer **) (curParm)));
 572                                 break;
 573                         case MONO_TYPE_FNPTR :
 574                                 printf("[FNPTR:%p], ", *((gpointer **) (curParm)));
 575                                 break;
 576                         case MONO_TYPE_ARRAY :
 577                                 printf("[ARRAY:%p], ", *((gpointer **) (curParm)));
 578                                 break;
 579                         case MONO_TYPE_SZARRAY :
 580                                 printf("[SZARRAY:%p], ", *((gpointer **) (curParm)));
 581                                 break;
 582                         case MONO_TYPE_I8 :
 583                                 printf("[INT8:%lld], ", *((gint64 *) (curParm)));
 584                                 break;
 585                         case MONO_TYPE_R4 :
 586                                 printf("[FLOAT4:%g], ", *((double *) (curParm)));
 587                                 break;
 588                         case MONO_TYPE_R8 :
 589                                 printf("[FLOAT8:%g], ", *((double *) (curParm)));
 590                                 break;
 591                         case MONO_TYPE_VALUETYPE : {
 592                                 int i;
 593                                 MonoMarshalType *info;
 594
 595                                 if (type->data.klass->enumtype) {
 596                                         simpleType = type->data.klass->enum_basetype->type;
 597                                         printf("{VALUETYPE} - ");
 598                                         goto enum_parmtype;
 599                                 }
 600
 601                                 info = mono_marshal_load_type_info (type->data.klass);
 602
 603                                 if ((info->native_size == sizeof(float)) &&
 604                                     (info->num_fields  == 1) &&
 605                                     (info->fields[0].field->type->type == MONO_TYPE_R4)) {
 606                                                 printf("[FLOAT4:%f], ", *((float *) (curParm)));
 607                                         break;
 608                                 }
 609
 610                                 if ((info->native_size == sizeof(double)) &&
 611                                     (info->num_fields  == 1) &&
 612                                     (info->fields[0].field->type->type == MONO_TYPE_R8)) {
 613                                         printf("[FLOAT8:%g], ", *((double *) (curParm)));
 614                                         break;
 615                                 }
 616
 617                                 printf("[VALUETYPE:");
 618                                 for (i = 0; i < size; i++)
 619                                         printf("%02x,", *((guint8 *)curParm+i));
 620                                 printf("]");
 621                                 break;
 622                         }
 623                         case MONO_TYPE_TYPEDBYREF: {
 624                                 int i;
 625                                 printf("[TYPEDBYREF:");
 626                                 for (i = 0; i < size; i++)
 627                                         printf("%02x,", *((guint8 *)curParm+i));
 628                                 printf("]");
 629                                 break;
 630                         }
 631                         default :
 632                                 printf("[?? - %d], ",simpleType);
 633                 }
 634         }
 635 }
 636
 637 /*========================= End of Function ========================*/
 638
 639 static int lc = 0;
 640 /*------------------------------------------------------------------*/
 641 /*                                                                  */
 642 /* Name         - enter_method                                      */
 643 /*                                                                  */
 644 /* Function     - Perform tracing of the entry to the current       */
 645 /*                method.                                           */
 646 /*                                                                  */
 647 /*------------------------------------------------------------------*/
 648
 649 static void
 650 enter_method (MonoMethod *method, RegParm *rParm, char *sp)
 651 {
 652         int i, oParm = 0, iParm = 0;
 653         MonoClass *class;
 654         MonoObject *obj;
 655         MonoMethodSignature *sig;
 656         char *fname;
 657         guint32 ip;
 658         CallInfo *cinfo;
 659         ArgInfo *ainfo;
 660         size_data sz;
 661         void *curParm;
 662
 663
 664 lc++;
 665 if (lc > 5000000) {
 666 fseek(stdout, 0L, SEEK_SET);
 667 lc = 0;
 668 }
 669         fname = mono_method_full_name (method, TRUE);
 670         indent (1);
 671         printf ("ENTER: %s(", fname);
 672         g_free (fname);
 673
 674         ip  = (*(guint32 *) (sp+S390_RET_ADDR_OFFSET)) & 0x7fffffff;
 675         printf (") ip: %p sp: %p - ", (gpointer) ip, sp);
 676
 677         if (rParm == NULL)
 678                 return;
 679
 680         sig = mono_method_signature (method);
 681
 682         cinfo = calculate_sizes (sig, &sz, sig->pinvoke);
 683
 684         if (cinfo->struct_ret) {
 685                 printf ("[STRUCTRET:%p], ", (gpointer) rParm->gr[0]);
 686                 iParm = 1;
 687         }
 688
 689         if (sig->hasthis) {
 690                 gpointer *this = (gpointer *) rParm->gr[iParm];
 691                 obj = (MonoObject *) this;
 692                 if (method->klass->valuetype) {
 693                         if (obj) {
 694                                 printf("this:[value:%p:%08x], ",
 695                                        this, *((guint32 *)(this+sizeof(MonoObject))));
 696                         } else
 697                                 printf ("this:[NULL], ");
 698                 } else {
 699                         if (obj) {
 700 //                              class = obj->vtable->klass;
 701 //                              if (class == mono_defaults.string_class) {
 702 //                                      printf ("this:[STRING:%p:%s], ",
 703 //                                              obj, mono_string_to_utf8 ((MonoString *)obj));
 704 //                              } else {
 705 //                                      printf ("this:%p[%s.%s], ",
 706 //                                              obj, class->name_space, class->name);
 707 //                              }
 708 printf("this:%p, ",obj);
 709                         } else
 710                                 printf ("this:NULL, ");
 711                 }
 712                 oParm++;
 713         }
 714
 715         for (i = 0; i < sig->param_count; ++i) {
 716                 ainfo = &cinfo->args[i + oParm];
 717                 switch (ainfo->regtype) {
 718                         case RegTypeGeneral :
 719                                 decodeParm(sig->params[i], &(rParm->gr[ainfo->reg-2]), ainfo->size);
 720                                 break;
 721                         case RegTypeFP :
 722                                 decodeParm(sig->params[i], &(rParm->fp[ainfo->reg]), ainfo->size);
 723                                 break;
 724                         case RegTypeBase :
 725                                 decodeParm(sig->params[i], sp+ainfo->offset, ainfo->size);
 726                                 break;
 727                         case RegTypeStructByVal :
 728                                 if (ainfo->reg != STK_BASE)
 729                                         curParm = &(rParm->gr[ainfo->reg-2]);
 730                                 else
 731                                         curParm = sp+ainfo->offset;
 732
 733                                 if (retFitsInReg (ainfo->vtsize))
 734                                         decodeParm(sig->params[i],
 735                                                    curParm,
 736                                                    ainfo->size);
 737                                 else
 738                                         decodeParm(sig->params[i],
 739                                                    *((char **) curParm),
 740                                                    ainfo->vtsize);
 741                                 break;
 742                         case RegTypeStructByAddr :
 743                                 if (ainfo->reg != STK_BASE)
 744                                         curParm = &(rParm->gr[ainfo->reg-2]);
 745                                 else
 746                                         curParm = sp+ainfo->offset;
 747
 748                                 decodeParm(sig->params[i],
 749                                            *((char **) curParm),
 750                                            ainfo->vtsize);
 751                                 break;
 752
 753                         default :
 754                                 printf("???, ");
 755                 }
 756         }
 757         printf("\n");
 758         g_free(cinfo);
 759 }
 760
 761 /*========================= End of Function ========================*/
 762
 763 /*------------------------------------------------------------------*/
 764 /*                                                                  */
 765 /* Name         - leave_method                                      */
 766 /*                                                                  */
 767 /* Function     -                                                   */
 768 /*                                                                  */
 769 /*------------------------------------------------------------------*/
 770
 771 static void
 772 leave_method (MonoMethod *method, ...)
 773 {
 774         MonoType *type;
 775         char *fname;
 776         guint32 ip;
 777         va_list ap;
 778
 779         va_start(ap, method);
 780
 781         fname = mono_method_full_name (method, TRUE);
 782         indent (-1);
 783         printf ("LEAVE: %s", fname);
 784         g_free (fname);
 785
 786         type = mono_method_signature (method)->ret;
 787
 788 handle_enum:
 789         switch (type->type) {
 790         case MONO_TYPE_VOID:
 791                 break;
 792         case MONO_TYPE_BOOLEAN: {
 793                 int val = va_arg (ap, int);
 794                 if (val)
 795                         printf ("[TRUE:%d]", val);
 796                 else
 797                         printf ("[FALSE]");
 798
 799                 break;
 800         }
 801         case MONO_TYPE_CHAR: {
 802                 int val = va_arg (ap, int);
 803                 printf ("[CHAR:%d]", val);
 804                 break;
 805         }
 806         case MONO_TYPE_I1: {
 807                 int val = va_arg (ap, int);
 808                 printf ("[INT1:%d]", val);
 809                 break;
 810         }
 811         case MONO_TYPE_U1: {
 812                 int val = va_arg (ap, int);
 813                 printf ("[UINT1:%d]", val);
 814                 break;
 815         }
 816         case MONO_TYPE_I2: {
 817                 int val = va_arg (ap, int);
 818                 printf ("[INT2:%d]", val);
 819                 break;
 820         }
 821         case MONO_TYPE_U2: {
 822                 int val = va_arg (ap, int);
 823                 printf ("[UINT2:%d]", val);
 824                 break;
 825         }
 826         case MONO_TYPE_I4: {
 827                 int val = va_arg (ap, int);
 828                 printf ("[INT4:%d]", val);
 829                 break;
 830         }
 831         case MONO_TYPE_U4: {
 832                 int val = va_arg (ap, int);
 833                 printf ("[UINT4:%d]", val);
 834                 break;
 835         }
 836         case MONO_TYPE_I: {
 837                 int val = va_arg (ap, int);
 838                 printf ("[INT:%d]", val);
 839                 printf("]");
 840                 break;
 841         }
 842         case MONO_TYPE_U: {
 843                 int val = va_arg (ap, int);
 844                 printf ("[UINT:%d]", val);
 845                 printf("]");
 846                 break;
 847         }
 848         case MONO_TYPE_STRING: {
 849                 MonoString *s = va_arg (ap, MonoString *);
 850 ;
 851                 if (s) {
 852                         g_assert (((MonoObject *)s)->vtable->klass == mono_defaults.string_class);
 853                         printf ("[STRING:%p:%s]", s, mono_string_to_utf8 (s));
 854                 } else
 855                         printf ("[STRING:null], ");
 856                 break;
 857         }
 858         case MONO_TYPE_CLASS:
 859         case MONO_TYPE_OBJECT: {
 860                 MonoObject *o = va_arg (ap, MonoObject *);
 861
 862 //              if ((o) && (o->vtable)) {
 863 //                      if (o->vtable->klass == mono_defaults.boolean_class) {
 864 //                              printf ("[BOOLEAN:%p:%d]", o, *((guint8 *)o + sizeof (MonoObject)));
 865 //                      } else if  (o->vtable->klass == mono_defaults.int32_class) {
 866 //                              printf ("[INT32:%p:%d]", o, *((gint32 *)((char *)o + sizeof (MonoObject))));
 867 //                      } else if  (o->vtable->klass == mono_defaults.int64_class) {
 868 //                              printf ("[INT64:%p:%lld]", o, *((gint64 *)((char *)o + sizeof (MonoObject))));
 869 //                      } else
 870 //                              printf ("[%s.%s:%p]", o->vtable->klass->name_space, o->vtable->klass->name, o);
 871 //              } else
 872                         printf ("[OBJECT:%p]", o);
 873
 874                 break;
 875         }
 876         case MONO_TYPE_PTR:
 877         case MONO_TYPE_FNPTR:
 878         case MONO_TYPE_ARRAY:
 879         case MONO_TYPE_SZARRAY: {
 880                 gpointer p = va_arg (ap, gpointer);
 881                 printf ("[result=%p]", p);
 882                 break;
 883         }
 884         case MONO_TYPE_I8: {
 885                 gint64 l =  va_arg (ap, gint64);
 886                 printf ("[LONG:%lld]", l);
 887                 break;
 888         }
 889         case MONO_TYPE_U8: {
 890                 guint64 l =  va_arg (ap, guint64);
 891                 printf ("[ULONG:%llu]", l);
 892                 break;
 893         }
 894         case MONO_TYPE_R4: {
 895                 double f;
 896                 f = va_arg (ap, double);
 897                 printf ("[FLOAT4:%g]\n", f);
 898                 break;
 899         }
 900         case MONO_TYPE_R8: {
 901                 double f = va_arg (ap, double);
 902                 printf ("[FLOAT8:%g]\n", f);
 903                 break;
 904         }
 905         case MONO_TYPE_VALUETYPE: {
 906                 MonoMarshalType *info;
 907                 if (type->data.klass->enumtype) {
 908                         type = type->data.klass->enum_basetype;
 909                         goto handle_enum;
 910                 } else {
 911                         guint8 *p = va_arg (ap, gpointer);
 912                         int j, size, align;
 913
 914                         info = mono_marshal_load_type_info (type->data.klass);
 915
 916                         if ((info->native_size == sizeof(float)) &&
 917                             (info->num_fields  == 1) &&
 918                             (info->fields[0].field->type->type == MONO_TYPE_R4)) {
 919                                 double f = va_arg (ap, double);
 920                                 printf("[FLOAT4:%g]\n", (double) f);
 921                                 break;
 922                         }
 923
 924                         if ((info->native_size == sizeof(double)) &&
 925                             (info->num_fields  == 1) &&
 926                             (info->fields[0].field->type->type == MONO_TYPE_R8)) {
 927                                 double f = va_arg (ap, double);
 928                                 printf("[FLOAT8:%g]\n", f);
 929                                 break;
 930                         }
 931
 932                         size = mono_type_size (type, &align);
 933                         switch (size) {
 934                         case 1:
 935                         case 2:
 936                         case 4:
 937                         case 8:
 938                                 printf ("[");
 939                                 for (j = 0; p && j < size; j++)
 940                                         printf ("%02x,", p [j]);
 941                                 printf ("]\n");
 942                                 break;
 943                         default:
 944                                 printf ("[VALUERET]\n");
 945                         }
 946                 }
 947                 break;
 948         }
 949         case MONO_TYPE_TYPEDBYREF: {
 950                 guint8 *p = va_arg (ap, gpointer);
 951                 int j, size, align;
 952                 size = mono_type_size (type, &align);
 953                 switch (size) {
 954                 case 1:
 955                 case 2:
 956                 case 4:
 957                 case 8:
 958                         printf ("[");
 959                         for (j = 0; p && j < size; j++)
 960                                 printf ("%02x,", p [j]);
 961                         printf ("]\n");
 962                         break;
 963                 default:
 964                         printf ("[TYPEDBYREF]\n");
 965                 }
 966         }
 967                 break;
 968         default:
 969                 printf ("(unknown return type %x)",
 970                         mono_method_signature (method)->ret->type);
 971         }
 972
 973         ip = ((gint32) __builtin_return_address (0)) & 0x7fffffff;
 974         printf (" ip: %p\n", (gpointer) ip);
 975 }
 976
 977 /*========================= End of Function ========================*/
 978
 979 /*------------------------------------------------------------------*/
 980 /*                                                                  */
 981 /* Name         - mono_arch_cpu_init                                */
 982 /*                                                                  */
 983 /* Function     - Perform CPU specific initialization to execute    */
 984 /*                managed code.                                     */
 985 /*                                                                  */
 986 /*------------------------------------------------------------------*/
 987
 988 void
 989 mono_arch_cpu_init (void)
 990 {
 991         guint mode = 1;
 992
 993         /*--------------------------------------*/
 994         /* Set default rounding mode for FP     */
 995         /*--------------------------------------*/
 996         __asm__ ("SRNM\t%0\n\t"
 997                 : : "m" (mode));
 998 }
 999
1000 /*========================= End of Function ========================*/
1001
1002 /*------------------------------------------------------------------*/
1003 /*                                                                  */
1004 /* Name         - mono_arch_cpu_optimizazions                       */
1005 /*                                                                  */
1006 /* Function     - Returns the optimizations supported on this CPU   */
1007 /*                                                                  */
1008 /*------------------------------------------------------------------*/
1009
1010 guint32
1011 mono_arch_cpu_optimizazions (guint32 *exclude_mask)
1012 {
1013         guint32 opts = 0;
1014
1015         /*----------------------------------------------------------*/
1016         /* no s390-specific optimizations yet                       */
1017         /*----------------------------------------------------------*/
1018         *exclude_mask = MONO_OPT_INLINE|MONO_OPT_LINEARS;
1019 //      *exclude_mask = MONO_OPT_INLINE;
1020         return opts;
1021 }
1022
1023 /*========================= End of Function ========================*/
1024
1025 /*------------------------------------------------------------------*/
1026 /*                                                                  */
1027 /* Name         -                                                   */
1028 /*                                                                  */
1029 /* Function     -                                                   */
1030 /*                                                                  */
1031 /*------------------------------------------------------------------*/
1032
1033 static gboolean
1034 is_regsize_var (MonoType *t) {
1035         if (t->byref)
1036                 return TRUE;
1037         switch (mono_type_get_underlying_type (t)->type) {
1038         case MONO_TYPE_I4:
1039         case MONO_TYPE_U4:
1040         case MONO_TYPE_I:
1041         case MONO_TYPE_U:
1042         case MONO_TYPE_PTR:
1043         case MONO_TYPE_FNPTR:
1044                 return TRUE;
1045         case MONO_TYPE_OBJECT:
1046         case MONO_TYPE_STRING:
1047         case MONO_TYPE_CLASS:
1048         case MONO_TYPE_SZARRAY:
1049         case MONO_TYPE_ARRAY:
1050                 return FALSE;
1051         case MONO_TYPE_VALUETYPE:
1052                 if (t->data.klass->enumtype)
1053                         return is_regsize_var (t->data.klass->enum_basetype);
1054                 return FALSE;
1055         }
1056         return FALSE;
1057 }
1058
1059 /*========================= End of Function ========================*/
1060
1061 /*------------------------------------------------------------------*/
1062 /*                                                                  */
1063 /* Name         - mono_arch_get_allocatable_int_vars                */
1064 /*                                                                  */
1065 /* Function     -                                                   */
1066 /*                                                                  */
1067 /*------------------------------------------------------------------*/
1068
1069 GList *
1070 mono_arch_get_allocatable_int_vars (MonoCompile *cfg)
1071 {
1072         GList *vars = NULL;
1073         int i;
1074
1075         for (i = 0; i < cfg->num_varinfo; i++) {
1076                 MonoInst *ins = cfg->varinfo [i];
1077                 MonoMethodVar *vmv = MONO_VARINFO (cfg, i);
1078
1079                 /* unused vars */
1080                 if (vmv->range.first_use.abs_pos >= vmv->range.last_use.abs_pos)
1081                         continue;
1082
1083                 if (ins->flags & (MONO_INST_VOLATILE|MONO_INST_INDIRECT) ||
1084                     (ins->opcode != OP_LOCAL && ins->opcode != OP_ARG))
1085                         continue;
1086
1087                 /* we can only allocate 32 bit values */
1088                 if (is_regsize_var (ins->inst_vtype)) {
1089                         g_assert (MONO_VARINFO (cfg, i)->reg == -1);
1090                         g_assert (i == vmv->idx);
1091                         vars = mono_varlist_insert_sorted (cfg, vars, vmv, FALSE);
1092                 }
1093         }
1094
1095         return vars;
1096 }
1097
1098 /*========================= End of Function ========================*/
1099
1100 /*------------------------------------------------------------------*/
1101 /*                                                                  */
1102 /* Name         - mono_arch_global_int_regs                         */
1103 /*                                                                  */
1104 /* Function     - Return a list of usable integer registers.        */
1105 /*                                                                  */
1106 /*------------------------------------------------------------------*/
1107
1108 GList *
1109 mono_arch_get_global_int_regs (MonoCompile *cfg)
1110 {
1111         GList *regs = NULL;
1112         MonoMethodHeader *header;
1113         int i, top = 13;
1114
1115         header = mono_method_get_header (cfg->method);
1116         if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
1117                 cfg->frame_reg = s390_r11;
1118
1119         for (i = 8; i < top; ++i) {
1120                 if (cfg->frame_reg != i)
1121                         regs = g_list_prepend (regs, GUINT_TO_POINTER (i));
1122         }
1123
1124         return regs;
1125 }
1126
1127 /*========================= End of Function ========================*/
1128
1129 /*------------------------------------------------------------------*/
1130 /*                                                                  */
1131 /* Name         -  mono_arch_flush_icache                           */
1132 /*                                                                  */
1133 /* Function     -  Flush the CPU icache.                            */
1134 /*                                                                  */
1135 /*------------------------------------------------------------------*/
1136
1137 void
1138 mono_arch_flush_icache (guint8 *code, gint size)
1139 {
1140 }
1141
1142 /*========================= End of Function ========================*/
1143
1144 /*------------------------------------------------------------------*/
1145 /*                                                                  */
1146 /* Name         - add_general                                       */
1147 /*                                                                  */
1148 /* Function     - Determine code and stack size incremements for a  */
1149 /*                parameter.                                        */
1150 /*                                                                  */
1151 /*------------------------------------------------------------------*/
1152
1153 static void inline
1154 add_general (guint *gr, size_data *sz, ArgInfo *ainfo, gboolean simple)
1155 {
1156         if (simple) {
1157                 if (*gr > S390_LAST_ARG_REG) {
1158                         sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1159                         ainfo->offset   = sz->stack_size;
1160                         ainfo->reg      = STK_BASE;
1161                         ainfo->regtype  = RegTypeBase;
1162                         sz->stack_size += sizeof(int);
1163                         sz->local_size += sizeof(int);
1164                         sz->offStruct  += sizeof(int);
1165                         sz->code_size  += 12;
1166                 } else {
1167                         ainfo->reg      = *gr;
1168                         sz->code_size  += 8;
1169                 }
1170         } else {
1171                 if (*gr > S390_LAST_ARG_REG - 1) {
1172                         sz->stack_size  = S390_ALIGN(sz->stack_size, S390_STACK_ALIGNMENT);
1173                         ainfo->offset   = sz->stack_size;
1174                         ainfo->reg      = STK_BASE;
1175                         ainfo->regtype  = RegTypeBase;
1176                         sz->stack_size += sizeof(long long);
1177                         sz->local_size += sizeof(long long);
1178                         sz->offStruct  += sizeof(long long);
1179                         sz->code_size  += 10;
1180                 } else {
1181                         ainfo->reg      = *gr;
1182                         sz->code_size  += 8;
1183                 }
1184                 (*gr) ++;
1185         }
1186         (*gr) ++;
1187 }
1188
1189 /*========================= End of Function ========================*/
1190
1191 /*------------------------------------------------------------------*/
1192 /*                                                                  */
1193 /* Name         - add_stackParm                                     */
1194 /*                                                                  */
1195 /* Function     - Determine code and stack size incremements for a  */
1196 /*                parameter.                                        */
1197 /*                                                                  */
1198 /*------------------------------------------------------------------*/
1199
1200 static void inline
1201 add_stackParm (guint *gr, size_data *sz, ArgInfo *ainfo, gint size)
1202 {
1203         if (*gr > S390_LAST_ARG_REG) {
1204                 sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1205                 ainfo->reg      = STK_BASE;
1206                 sz->parm_size  += sizeof(gpointer);
1207                 sz->offStruct  += sizeof(gpointer);
1208         } else {
1209                 ainfo->reg      = *gr;
1210         }
1211         (*gr) ++;
1212         ainfo->offset   = sz->stack_size;
1213         ainfo->offparm  = sz->offset;
1214         sz->offset      = S390_ALIGN(sz->offset+size, sizeof(long));
1215         ainfo->size     = size;
1216         ainfo->regtype  = RegTypeStructByAddr;
1217         ainfo->vtsize   = size;
1218         sz->parm_size  += size;
1219 }
1220
1221 /*========================= End of Function ========================*/
1222
1223 /*------------------------------------------------------------------*/
1224 /*                                                                  */
1225 /* Name         - add_float                                         */
1226 /*                                                                  */
1227 /* Function     - Determine code and stack size incremements for a  */
1228 /*                float parameter.                                  */
1229 /*                                                                  */
1230 /*------------------------------------------------------------------*/
1231
1232 static void inline
1233 add_float (guint *fr,  size_data *sz, ArgInfo *ainfo)
1234 {
1235         if ((*fr) <= S390_LAST_FPARG_REG) {
1236                 ainfo->regtype = RegTypeFP;
1237                 ainfo->reg     = *fr;
1238                 sz->code_size += 4;
1239                 (*fr) += 2;
1240         }
1241         else {
1242                 ainfo->offset   = sz->stack_size;
1243                 ainfo->reg      = STK_BASE;
1244                 ainfo->regtype  = RegTypeBase;
1245                 sz->code_size  += 4;
1246                 sz->stack_size += ainfo->size;
1247                 sz->local_size += ainfo->size;
1248                 sz->offStruct  += ainfo->size;
1249         }
1250 }
1251
1252 /*========================= End of Function ========================*/
1253
1254 /*------------------------------------------------------------------*/
1255 /*                                                                  */
1256 /* Name         - calculate_sizes                                   */
1257 /*                                                                  */
1258 /* Function     - Determine the amount of space required for code   */
1259 /*                and stack. In addition determine starting points  */
1260 /*                for stack-based parameters, and area for struct-  */
1261 /*                ures being returned on the stack.                 */
1262 /*                                                                  */
1263 /*------------------------------------------------------------------*/
1264
1265 static CallInfo *
1266 calculate_sizes (MonoMethodSignature *sig, size_data *sz,
1267                  gboolean string_ctor)
1268 {
1269         guint i, fr, gr, size;
1270         int nParm = sig->hasthis + sig->param_count;
1271         guint32 simpletype, align;
1272         CallInfo *cinfo = g_malloc0 (sizeof (CallInfo) + sizeof (ArgInfo) * nParm);
1273
1274         fr                = 0;
1275         gr                = s390_r2;
1276         nParm             = 0;
1277         cinfo->struct_ret = 0;
1278         sz->offset        = 0;
1279         sz->offStruct     = S390_MINIMAL_STACK_SIZE;
1280         sz->retStruct     = 0;
1281         sz->stack_size    = S390_MINIMAL_STACK_SIZE;
1282         sz->code_size     = 0;
1283         sz->parm_size     = 0;
1284         sz->local_size    = 0;
1285
1286         /*----------------------------------------------------------*/
1287         /* We determine the size of the return code/stack in case we*/
1288         /* need to reserve a register to be used to address a stack */
1289         /* area that the callee will use.                           */
1290         /*----------------------------------------------------------*/
1291
1292         simpletype = mono_type_get_underlying_type (sig->ret)->type;
1293 enum_retvalue:
1294         switch (simpletype) {
1295                 case MONO_TYPE_BOOLEAN:
1296                 case MONO_TYPE_I1:
1297                 case MONO_TYPE_U1:
1298                 case MONO_TYPE_I2:
1299                 case MONO_TYPE_U2:
1300                 case MONO_TYPE_CHAR:
1301                 case MONO_TYPE_I4:
1302                 case MONO_TYPE_U4:
1303                 case MONO_TYPE_I:
1304                 case MONO_TYPE_U:
1305                 case MONO_TYPE_CLASS:
1306                 case MONO_TYPE_OBJECT:
1307                 case MONO_TYPE_SZARRAY:
1308                 case MONO_TYPE_ARRAY:
1309                 case MONO_TYPE_PTR:
1310                 case MONO_TYPE_FNPTR:
1311                 case MONO_TYPE_STRING:
1312                         cinfo->ret.reg = s390_r2;
1313                         sz->code_size += 4;
1314                         break;
1315                 case MONO_TYPE_R4:
1316                 case MONO_TYPE_R8:
1317                         cinfo->ret.reg = s390_f0;
1318                         sz->code_size += 4;
1319                         break;
1320                 case MONO_TYPE_I8:
1321                 case MONO_TYPE_U8:
1322                         cinfo->ret.reg = s390_r2;
1323                         sz->code_size += 4;
1324                         break;
1325                 case MONO_TYPE_GENERICINST:
1326                         if (!mono_type_generic_inst_is_valuetype (sig->ret)) {
1327                                 cinfo->ret.reg = s390_r2;
1328                                 sz->code_size += 4;
1329                                 break;
1330                         }
1331                         /* Fall through */
1332                 case MONO_TYPE_VALUETYPE: {
1333                         MonoClass *klass = mono_class_from_mono_type (sig->ret);
1334                         if (sig->ret->data.klass->enumtype) {
1335                                 simpletype = sig->ret->data.klass->enum_basetype->type;
1336                                 goto enum_retvalue;
1337                         }
1338                         if (sig->pinvoke)
1339                                 size = mono_class_native_size (klass, &align);
1340                         else
1341                                 size = mono_class_value_size (klass, &align);
1342
1343                         cinfo->ret.reg    = s390_r2;
1344                         cinfo->struct_ret = 1;
1345                         cinfo->ret.size   = size;
1346                         cinfo->ret.vtsize = size;
1347                         gr++;
1348                         break;
1349                 }
1350                 case MONO_TYPE_TYPEDBYREF:
1351                         size = sizeof (MonoTypedRef);
1352                         cinfo->ret.reg    = s390_r2;
1353                         cinfo->struct_ret = 1;
1354                         cinfo->ret.size   = size;
1355                         cinfo->ret.vtsize = size;
1356                         gr++;
1357                         break;
1358                 case MONO_TYPE_VOID:
1359                         break;
1360                 default:
1361                         g_error ("Can't handle as return value 0x%x", sig->ret->type);
1362         }
1363
1364         if (sig->hasthis) {
1365                 add_general (&gr, sz, cinfo->args+nParm, TRUE);
1366                 cinfo->args[nParm].size = sizeof(gpointer);
1367                 nParm++;
1368         }
1369
1370         /*----------------------------------------------------------*/
1371         /* We determine the size of the parameter code and stack    */
1372         /* requirements by checking the types and sizes of the      */
1373         /* parameters.                                              */
1374         /*----------------------------------------------------------*/
1375
1376         for (i = 0; i < sig->param_count; ++i) {
1377                 /*--------------------------------------------------*/
1378                 /* Handle vararg type calls. All args are put on    */
1379                 /* the stack.                                       */
1380                 /*--------------------------------------------------*/
1381                 if ((sig->call_convention == MONO_CALL_VARARG) &&
1382                     (i == sig->sentinelpos)) {
1383                         gr = S390_LAST_ARG_REG + 1;
1384                         add_general (&gr, sz, &cinfo->sigCookie, TRUE);
1385                 }
1386
1387                 if (sig->params [i]->byref) {
1388                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1389                         cinfo->args[nParm].size = sizeof(gpointer);
1390                         nParm++;
1391                         continue;
1392                 }
1393
1394                 simpletype = mono_type_get_underlying_type(sig->params [i])->type;
1395                 switch (simpletype) {
1396                 case MONO_TYPE_BOOLEAN:
1397                 case MONO_TYPE_I1:
1398                 case MONO_TYPE_U1:
1399                         cinfo->args[nParm].size = sizeof(char);
1400                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1401                         nParm++;
1402                         break;
1403                 case MONO_TYPE_I2:
1404                 case MONO_TYPE_U2:
1405                 case MONO_TYPE_CHAR:
1406                         cinfo->args[nParm].size = sizeof(short);
1407                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1408                         nParm++;
1409                         break;
1410                 case MONO_TYPE_I4:
1411                 case MONO_TYPE_U4:
1412                         cinfo->args[nParm].size = sizeof(int);
1413                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1414                         nParm++;
1415                         break;
1416                 case MONO_TYPE_I:
1417                 case MONO_TYPE_U:
1418                 case MONO_TYPE_PTR:
1419                 case MONO_TYPE_FNPTR:
1420                 case MONO_TYPE_CLASS:
1421                 case MONO_TYPE_OBJECT:
1422                 case MONO_TYPE_STRING:
1423                 case MONO_TYPE_SZARRAY:
1424                 case MONO_TYPE_ARRAY:
1425                         cinfo->args[nParm].size = sizeof(gpointer);
1426                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1427                         nParm++;
1428                         break;
1429                 case MONO_TYPE_I8:
1430                 case MONO_TYPE_U8:
1431                         cinfo->args[nParm].size = sizeof(long long);
1432                         add_general (&gr, sz, cinfo->args+nParm, FALSE);
1433                         nParm++;
1434                         break;
1435                 case MONO_TYPE_R4:
1436                         cinfo->args[nParm].size = sizeof(float);
1437                         add_float (&fr, sz, cinfo->args+nParm);
1438                         nParm++;
1439                         break;
1440                 case MONO_TYPE_R8:
1441                         cinfo->args[nParm].size = sizeof(double);
1442                         add_float (&fr, sz, cinfo->args+nParm);
1443                         nParm++;
1444                         break;
1445                 case MONO_TYPE_GENERICINST:
1446                         if (!mono_type_generic_inst_is_valuetype (sig->params [i])) {
1447                                 cinfo->args[nParm].size = sizeof(gpointer);
1448                                 add_general (&gr, sz, cinfo->args+nParm, TRUE);
1449                                 nParm++;
1450                                 break;
1451                         }
1452                         /* Fall through */
1453                 case MONO_TYPE_VALUETYPE: {
1454                         MonoMarshalType *info;
1455                         MonoClass *klass = mono_class_from_mono_type (sig->params [i]);
1456                         if (sig->pinvoke)
1457                                 size = mono_class_native_size (klass, &align);
1458                         else
1459                                 size = mono_class_value_size (klass, &align);
1460
1461                         info = mono_marshal_load_type_info (klass);
1462
1463                         if ((info->native_size == sizeof(float)) &&
1464                             (info->num_fields  == 1) &&
1465                             (info->fields[0].field->type->type == MONO_TYPE_R4)) {
1466                                 cinfo->args[nParm].size = sizeof(float);
1467                                 add_float(&fr, sz, cinfo->args+nParm);
1468                                 break;
1469                         }
1470
1471                         if ((info->native_size == sizeof(double)) &&
1472                             (info->num_fields  == 1) &&
1473                             (info->fields[0].field->type->type == MONO_TYPE_R8)) {
1474                                 cinfo->args[nParm].size = sizeof(double);
1475                                 add_float(&fr, sz, cinfo->args+nParm);
1476                                 break;
1477                         }
1478
1479                         cinfo->args[nParm].vtsize  = 0;
1480                         cinfo->args[nParm].size    = 0;
1481
1482                         switch (size) {
1483                                 /*----------------------------------*/
1484                                 /* On S/390, structures of size 1,  */
1485                                 /* 2, 4, and 8 bytes are passed in  */
1486                                 /* (a) register(s).                 */
1487                                 /*----------------------------------*/
1488                                 case 0:
1489                                 case 1:
1490                                 case 2:
1491                                 case 4:
1492                                         add_general(&gr, sz, cinfo->args+nParm, TRUE);
1493                                         cinfo->args[nParm].size    = size;
1494                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1495                                         nParm++;
1496                                         sz->local_size            += sizeof(long);
1497                                         break;
1498                                 case 8:
1499                                         add_general(&gr, sz, cinfo->args+nParm, FALSE);
1500                                         cinfo->args[nParm].size    = sizeof(long long);
1501                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1502                                         nParm++;
1503                                         sz->local_size            += sizeof(long);
1504                                         break;
1505                                 default:
1506                                         add_stackParm(&gr, sz, cinfo->args+nParm, size);
1507                                         nParm++;
1508                         }
1509                 }
1510                         break;
1511                 case MONO_TYPE_TYPEDBYREF: {
1512                         int size = sizeof (MonoTypedRef);
1513
1514                         cinfo->args[nParm].vtsize  = 0;
1515                         cinfo->args[nParm].size    = 0;
1516
1517                         switch (size) {
1518                                 /*----------------------------------*/
1519                                 /* On S/390, structures of size 1,  */
1520                                 /* 2, 4, and 8 bytes are passed in  */
1521                                 /* (a) register(s).                 */
1522                                 /*----------------------------------*/
1523                                 case 0:
1524                                 case 1:
1525                                 case 2:
1526                                 case 4:
1527                                         add_general(&gr, sz, cinfo->args+nParm, TRUE);
1528                                         cinfo->args[nParm].size    = size;
1529                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1530                                         nParm++;
1531                                         sz->local_size            += sizeof(long);
1532                                         break;
1533                                 case 8:
1534                                         add_general(&gr, sz, cinfo->args+nParm, FALSE);
1535                                         cinfo->args[nParm].size    = sizeof(long long);
1536                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1537                                         nParm++;
1538                                         sz->local_size            += sizeof(long);
1539                                         break;
1540                                 default:
1541                                         add_stackParm(&gr, sz, cinfo->args+nParm, size);
1542                                         nParm++;
1543                         }
1544                 }
1545                         break;
1546                 default:
1547                         g_error ("Can't trampoline 0x%x", sig->params [i]->type);
1548                 }
1549         }
1550
1551         /*----------------------------------------------------------*/
1552         /* If we are passing a structure back then if it won't be   */
1553         /* in a register(s) then we make room at the end of the     */
1554         /* parameters that may have been placed on the stack        */
1555         /*----------------------------------------------------------*/
1556         if (cinfo->struct_ret) {
1557                 cinfo->ret.offset = sz->stack_size;
1558                 switch (cinfo->ret.size) {
1559                 case 0:
1560                 case 1:
1561                 case 2:
1562                 case 4:
1563                 case 8:
1564                         break;
1565                 default:
1566                         sz->stack_size   += S390_ALIGN(cinfo->ret.size, align);
1567                 }
1568         }
1569
1570         /*----------------------------------------------------------*/
1571         /* Handle the case where there are no implicit arguments    */
1572         /*----------------------------------------------------------*/
1573         if ((sig->call_convention == MONO_CALL_VARARG) &&
1574             (sig->param_count == sig->sentinelpos)) {
1575                 gr = S390_LAST_ARG_REG + 1;
1576                 add_general (&gr, sz, &cinfo->sigCookie, TRUE);
1577         }
1578
1579         cinfo->lastgr   = gr;
1580         sz->stack_size  = sz->stack_size + sz->local_size + sz->parm_size +
1581                           sz->offset;
1582         sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1583
1584         return (cinfo);
1585 }
1586
1587 /*========================= End of Function ========================*/
1588
1589 /*------------------------------------------------------------------*/
1590 /*                                                                  */
1591 /* Name         - mono_arch_allocate_vars                           */
1592 /*                                                                  */
1593 /* Function     - Set var information according to the calling      */
1594 /*                convention for S/390. The local var stuff should  */
1595 /*                most likely be split in another method.           */
1596 /*                                                                  */
1597 /* Parameter    - @m - Compile unit.                                */
1598 /*                                                                  */
1599 /*------------------------------------------------------------------*/
1600
1601 void
1602 mono_arch_allocate_vars (MonoCompile *cfg)
1603 {
1604         MonoMethodSignature *sig;
1605         MonoMethodHeader *header;
1606         MonoInst *inst;
1607         CallInfo *cinfo;
1608         size_data sz;
1609         int iParm, iVar, offset, size, align, curinst;
1610         int frame_reg = STK_BASE;
1611         int sArg, eArg;
1612
1613         header  = mono_method_get_header (cfg->method);
1614
1615         cfg->flags |= MONO_CFG_HAS_SPILLUP;
1616
1617         /*---------------------------------------------------------*/
1618         /* We use the frame register also for any method that has  */
1619         /* filter clauses. This way, when the handlers are called, */
1620         /* the code will reference local variables using the frame */
1621         /* reg instead of the stack pointer: if we had to restore  */
1622         /* the stack pointer, we'd corrupt the method frames that  */
1623         /* are already on the stack (since filters get called      */
1624         /* before stack unwinding happens) when the filter code    */
1625         /* would call any method.                                  */
1626         /*---------------------------------------------------------*/
1627         if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
1628                 frame_reg = s390_r11;
1629
1630         cfg->frame_reg = frame_reg;
1631
1632         if (frame_reg != STK_BASE)
1633                 cfg->used_int_regs |= 1 << frame_reg;
1634
1635         sig     = mono_method_signature (cfg->method);
1636
1637         cinfo   = calculate_sizes (sig, &sz, sig->pinvoke);
1638
1639         if (cinfo->struct_ret) {
1640                 cfg->ret->opcode = OP_REGVAR;
1641                 cfg->ret->inst_c0 = s390_r2;
1642         } else {
1643                 switch (mono_type_get_underlying_type (sig->ret)->type) {
1644                 case MONO_TYPE_VOID:
1645                         break;
1646                 default:
1647                         cfg->ret->opcode = OP_REGVAR;
1648                         cfg->ret->dreg   = s390_r2;
1649                         break;
1650                 }
1651         }
1652
1653         /*--------------------------------------------------------------*/
1654         /* local vars are at a positive offset from the stack pointer   */
1655         /* also note that if the function uses alloca, we use s390_r11  */
1656         /* to point at the local variables.                             */
1657         /* add parameter area size for called functions                 */
1658         /*--------------------------------------------------------------*/
1659         offset          = (cfg->param_area + S390_MINIMAL_STACK_SIZE);
1660         cfg->sig_cookie = 0;
1661
1662         if (cinfo->struct_ret) {
1663                 inst               = cfg->ret;
1664                 offset             = S390_ALIGN(offset, sizeof(gpointer));
1665                 inst->inst_offset  = offset;
1666                 inst->opcode       = OP_REGOFFSET;
1667                 inst->inst_basereg = frame_reg;
1668                 offset            += sizeof(gpointer);
1669                 if ((sig->call_convention == MONO_CALL_VARARG) &&
1670                     (!retFitsInReg (cinfo->ret.size)))
1671                         cfg->sig_cookie += cinfo->ret.size;
1672         }
1673
1674         if (sig->hasthis) {
1675                 inst = cfg->varinfo [0];
1676                 if (inst->opcode != OP_REGVAR) {
1677                         inst->opcode       = OP_REGOFFSET;
1678                         inst->inst_basereg = frame_reg;
1679                         offset             = S390_ALIGN(offset, sizeof(gpointer));
1680                         inst->inst_offset  = offset;
1681                         offset            += sizeof (gpointer);
1682                 }
1683                 curinst = sArg = 1;
1684         } else {
1685                 curinst = sArg = 0;
1686         }
1687
1688         eArg = sig->param_count + sArg;
1689
1690         if (sig->call_convention == MONO_CALL_VARARG)
1691                 cfg->sig_cookie += S390_MINIMAL_STACK_SIZE;
1692
1693         for (iParm = sArg; iParm < eArg; ++iParm) {
1694                 inst = cfg->varinfo [curinst];
1695                 if (inst->opcode != OP_REGVAR) {
1696                         switch (cinfo->args[iParm].regtype) {
1697                                 case RegTypeStructByAddr :
1698                                 if (cinfo->args[iParm].reg == STK_BASE) {
1699                                         inst->opcode       = OP_S390_LOADARG;
1700                                         inst->inst_basereg = frame_reg;
1701                                         size               = abs(cinfo->args[iParm].vtsize);
1702                                         offset             = S390_ALIGN(offset, sizeof(long));
1703                                         inst->inst_offset  = offset;
1704                                         inst->backend.arg_info       = cinfo->args[iParm].offset;
1705                                 } else {
1706                                         inst->opcode       = OP_S390_ARGREG;
1707                                         inst->inst_basereg = frame_reg;
1708                                         size               = sizeof(gpointer);
1709                                         offset             = S390_ALIGN(offset, size);
1710                                         inst->inst_offset  = offset;
1711                                         inst->backend.arg_info       = cinfo->args[iParm].offset;
1712                                 }
1713                                         break;
1714                                 case RegTypeStructByVal :
1715                                         inst->opcode       = OP_S390_ARGPTR;
1716                                         inst->inst_basereg = frame_reg;
1717                                         size               = cinfo->args[iParm].size;
1718                                         offset             = S390_ALIGN(offset, size);
1719                                         inst->inst_offset  = offset;
1720                                         inst->backend.arg_info       = cinfo->args[iParm].offset;
1721                                         break;
1722                                 default :
1723                                 if (cinfo->args[iParm].reg != STK_BASE) {
1724                                         inst->opcode       = OP_REGOFFSET;
1725                                         inst->inst_basereg = frame_reg;
1726                                         size               = (cinfo->args[iParm].size < 8
1727                                                               ? sizeof(long)
1728                                                               : sizeof(long long));
1729                                         offset             = S390_ALIGN(offset, size);
1730                                         inst->inst_offset  = offset;
1731                                 } else {
1732                                         inst->opcode       = OP_S390_STKARG;
1733                                         inst->inst_basereg = frame_reg;
1734                                         size               = (cinfo->args[iParm].size < 4
1735                                                               ? 4 - cinfo->args[iParm].size
1736                                                               : 0);
1737                                         inst->inst_offset  = cinfo->args[iParm].offset +
1738                                                              size;
1739                                         inst->backend.arg_info       = 0;
1740                                         size               = sizeof(long);
1741                                 }
1742                         }
1743                         if ((sig->call_convention == MONO_CALL_VARARG) &&
1744                             (cinfo->args[iParm].regtype != RegTypeGeneral) &&
1745                             (iParm < sig->sentinelpos))
1746                                 cfg->sig_cookie += size;
1747
1748                         offset += size;
1749                 }
1750                 curinst++;
1751         }
1752
1753         curinst = cfg->locals_start;
1754         for (iVar = curinst; iVar < cfg->num_varinfo; ++iVar) {
1755                 inst = cfg->varinfo [iVar];
1756                 if ((inst->flags & MONO_INST_IS_DEAD) ||
1757                     (inst->opcode == OP_REGVAR))
1758                         continue;
1759
1760                 /*--------------------------------------------------*/
1761                 /* inst->backend.is_pinvoke indicates native sized value types, */
1762                 /* this is used by the pinvoke wrappers when they   */
1763                 /* call functions returning structure               */
1764                 /*--------------------------------------------------*/
1765                 if (inst->backend.is_pinvoke && MONO_TYPE_ISSTRUCT (inst->inst_vtype))
1766                         size = mono_class_native_size (mono_class_from_mono_type(inst->inst_vtype), &align);
1767                 else
1768                         size = mono_type_size (inst->inst_vtype, &align);
1769
1770                 offset             = S390_ALIGN(offset, align);
1771                 inst->inst_offset  = offset;
1772                 inst->opcode       = OP_REGOFFSET;
1773                 inst->inst_basereg = frame_reg;
1774                 offset            += size;
1775                 DEBUG (g_print("allocating local %d to %ld\n", iVar, inst->inst_offset));
1776         }
1777
1778         /*------------------------------------------------------*/
1779         /* Allow space for the trace method stack area if needed*/
1780         /*------------------------------------------------------*/
1781         if (mono_jit_trace_calls != NULL && mono_trace_eval (cfg->method)) {
1782                 offset += S390_TRACE_STACK_SIZE;
1783         }
1784
1785         /*------------------------------------------------------*/
1786         /* Reserve space to save LMF and caller saved registers */
1787         /*------------------------------------------------------*/
1788         if (cfg->method->save_lmf)
1789                 offset += sizeof (MonoLMF);
1790
1791         /*------------------------------------------------------*/
1792         /* align the offset                                     */
1793         /*------------------------------------------------------*/
1794         cfg->stack_offset = S390_ALIGN(offset, S390_STACK_ALIGNMENT);
1795
1796 }
1797
1798 /*========================= End of Function ========================*/
1799
1800 /*------------------------------------------------------------------*/
1801 /*                                                                  */
1802 /* Name         - mono_arch_call_opcode                             */
1803 /*                                                                  */
1804 /* Function     - Take the arguments and generate the arch-specific */
1805 /*                instructions to properly call the function. This  */
1806 /*                includes pushing, moving argments to the correct  */
1807 /*                etc.                                              */
1808 /*                                                                  */
1809 /*------------------------------------------------------------------*/
1810
1811 MonoCallInst*
1812 mono_arch_call_opcode (MonoCompile *cfg, MonoBasicBlock* bb,
1813                        MonoCallInst *call, int is_virtual) {
1814         MonoInst *in;
1815         MonoCallArgParm *arg;
1816         MonoMethodSignature *sig;
1817         int i, n, lParamArea;
1818         CallInfo *cinfo;
1819         ArgInfo *ainfo;
1820         size_data sz;
1821         int stackSize;
1822
1823         sig = call->signature;
1824         n = sig->param_count + sig->hasthis;
1825         DEBUG (g_print ("Call requires: %d parameters\n",n));
1826
1827         cinfo = calculate_sizes (sig, &sz, sig->pinvoke);
1828
1829         stackSize         = sz.stack_size + sz.local_size + sz.parm_size + sz.offset;
1830         call->stack_usage = MAX(stackSize, call->stack_usage);
1831         lParamArea        = MAX((call->stack_usage-S390_MINIMAL_STACK_SIZE-sz.parm_size), 0);
1832         cfg->param_area   = MAX(((signed) cfg->param_area), lParamArea);
1833         cfg->flags       |= MONO_CFG_HAS_CALLS;
1834
1835         if (cinfo->struct_ret)
1836                 call->used_iregs |= 1 << cinfo->ret.reg;
1837
1838         for (i = 0; i < n; ++i) {
1839                 ainfo = cinfo->args + i;
1840
1841                 if ((sig->call_convention == MONO_CALL_VARARG) &&
1842                     (i == sig->sentinelpos)) {
1843                         emit_sig_cookie (cfg, call, cinfo, ainfo->size);
1844                 }
1845
1846                 if (is_virtual && i == 0) {
1847                         /* the argument will be attached to the call instrucion */
1848                         in = call->args [i];
1849                         call->used_iregs |= 1 << ainfo->reg;
1850                 } else {
1851                         MONO_INST_NEW_CALL_ARG (cfg, arg, OP_OUTARG);
1852                         in                  = call->args [i];
1853                         arg->ins.cil_code   = in->cil_code;
1854                         arg->ins.inst_left  = in;
1855                         arg->ins.type       = in->type;
1856                         /* prepend, we'll need to reverse them later */
1857                         arg->ins.next       = call->out_args;
1858                         call->out_args      = (MonoInst *) arg;
1859                         arg->ins.inst_right = (MonoInst *) call;
1860                         if (ainfo->regtype == RegTypeGeneral) {
1861                                 arg->ins.backend.reg3   = ainfo->reg;
1862                                 call->used_iregs |= 1 << ainfo->reg;
1863                                 if (arg->ins.type == STACK_I8)
1864                                         call->used_iregs |= 1 << (ainfo->reg + 1);
1865                         } else if (ainfo->regtype == RegTypeStructByAddr) {
1866                                 call->used_iregs |= 1 << ainfo->reg;
1867                                 arg->ins.sreg1    = ainfo->reg;
1868                                 arg->ins.opcode   = OP_OUTARG_VT;
1869                                 arg->size         = -ainfo->vtsize;
1870                                 arg->offset       = ainfo->offset;
1871                                 arg->offPrm       = ainfo->offparm + sz.offStruct;
1872                         } else if (ainfo->regtype == RegTypeStructByVal) {
1873                                 if (ainfo->reg != STK_BASE) {
1874                                         switch (ainfo->size) {
1875                                         case 0:
1876                                         case 1:
1877                                         case 2:
1878                                         case 4:
1879                                                 call->used_iregs |= 1 << ainfo->reg;
1880                                                 break;
1881                                         case 8:
1882                                                 call->used_iregs |= 1 << ainfo->reg;
1883                                                 call->used_iregs |= 1 << (ainfo->reg+1);
1884                                                 break;
1885                                         default:
1886                                                 call->used_iregs |= 1 << ainfo->reg;
1887                                         }
1888                                 }
1889                                 arg->ins.sreg1  = ainfo->reg;
1890                                 arg->ins.opcode = OP_OUTARG_VT;
1891                                 arg->size       = ainfo->size;
1892                                 arg->offset     = ainfo->offset;
1893                                 arg->offPrm     = ainfo->offparm + sz.offStruct;
1894                         } else if (ainfo->regtype == RegTypeBase) {
1895                                 arg->ins.opcode   = OP_OUTARG_MEMBASE;
1896                                 arg->ins.sreg1    = ainfo->reg;
1897                                 arg->size         = ainfo->size;
1898                                 arg->offset       = ainfo->offset;
1899                                 call->used_iregs |= 1 << ainfo->reg;
1900                         } else if (ainfo->regtype == RegTypeFP) {
1901                                 arg->ins.backend.reg3   = ainfo->reg;
1902                                 call->used_fregs |= 1 << ainfo->reg;
1903                                 if (ainfo->size == 4)
1904                                         arg->ins.opcode = OP_OUTARG_R4;
1905                                 else
1906                                         arg->ins.opcode = OP_OUTARG_R8;
1907                         } else {
1908                                 g_assert_not_reached ();
1909                         }
1910                 }
1911         }
1912
1913         /*
1914          * Handle the case where there are no implicit arguments
1915          */
1916         if ((sig->call_convention == MONO_CALL_VARARG) &&
1917             (i == sig->sentinelpos)) {
1918                 emit_sig_cookie (cfg, call, cinfo, ainfo->size);
1919         }
1920
1921         /*
1922          * Reverse the call->out_args list.
1923          */
1924         {
1925                 MonoInst *prev = NULL, *list = call->out_args, *next;
1926                 while (list) {
1927                         next = list->next;
1928                         list->next = prev;
1929                         prev = list;
1930                         list = next;
1931                 }
1932                 call->out_args = prev;
1933         }
1934
1935         g_free (cinfo);
1936         return call;
1937 }
1938
1939 /*========================= End of Function ========================*/
1940
1941 /*------------------------------------------------------------------*/
1942 /*                                                                  */
1943 /* Name         - emit_sig_cookie.                                  */
1944 /*                                                                  */
1945 /* Function     - For variable length parameter lists construct a   */
1946 /*                signature cookie and emit it.                     */
1947 /*                                                                  */
1948 /*------------------------------------------------------------------*/
1949
1950 static void
1951 emit_sig_cookie (MonoCompile *cfg, MonoCallInst *call,
1952                  CallInfo *cinfo, int argSize)
1953 {
1954         MonoCallArgParm *arg;
1955         MonoMethodSignature *tmpSig;
1956         MonoInst *sigArg;
1957
1958         cfg->disable_aot = TRUE;
1959
1960         /*----------------------------------------------------------*/
1961         /* mono_ArgIterator_Setup assumes the signature cookie is   */
1962         /* passed first and all the arguments which were before it  */
1963         /* passed on the stack after the signature. So compensate   */
1964         /* by passing a different signature.                        */
1965         /*----------------------------------------------------------*/
1966         tmpSig = mono_metadata_signature_dup (call->signature);
1967         tmpSig->param_count -= call->signature->sentinelpos;
1968         tmpSig->sentinelpos  = 0;
1969         if (tmpSig->param_count > 0)
1970                 memcpy (tmpSig->params,
1971                         call->signature->params + call->signature->sentinelpos,
1972                         tmpSig->param_count * sizeof(MonoType *));
1973
1974         MONO_INST_NEW (cfg, sigArg, OP_ICONST);
1975         sigArg->inst_p0 = tmpSig;
1976
1977         MONO_INST_NEW_CALL_ARG (cfg, arg, OP_OUTARG_MEMBASE);
1978         arg->ins.inst_left   = sigArg;
1979         arg->ins.inst_right  = (MonoInst *) call;
1980         arg->size            = argSize;
1981         arg->offset          = cinfo->sigCookie.offset;
1982         arg->ins.next        = call->out_args;
1983         call->out_args       = (MonoInst *) arg;
1984 }
1985
1986 /*========================= End of Function ========================*/
1987
1988 /*------------------------------------------------------------------*/
1989 /*                                                                  */
1990 /* Name         - mono_arch_instrument_mem_needs                    */
1991 /*                                                                  */
1992 /* Function     - Allow tracing to work with this interface (with   */
1993 /*                an optional argument).                            */
1994 /*                                                                  */
1995 /*------------------------------------------------------------------*/
1996
1997 void
1998 mono_arch_instrument_mem_needs (MonoMethod *method, int *stack, int *code)
1999 {
2000         /* no stack room needed now (may be needed for FASTCALL-trace support) */
2001         *stack = 0;
2002         /* split prolog-epilog requirements? */
2003         *code = 50; /* max bytes needed: check this number */
2004 }
2005
2006 /*========================= End of Function ========================*/
2007
2008 /*------------------------------------------------------------------*/
2009 /*                                                                  */
2010 /* Name         - mono_arch_instrument_prolog                       */
2011 /*                                                                  */
2012 /* Function     - Create an "instrumented" prolog.                  */
2013 /*                                                                  */
2014 /*------------------------------------------------------------------*/
2015
2016 void*
2017 mono_arch_instrument_prolog (MonoCompile *cfg, void *func, void *p,
2018                              gboolean enable_arguments)
2019 {
2020         guchar  *code = p;
2021         int     parmOffset,
2022                 fpOffset,
2023                 baseReg;
2024
2025         parmOffset = cfg->stack_usage - S390_TRACE_STACK_SIZE;
2026         if (cfg->method->save_lmf)
2027                 parmOffset -= sizeof(MonoLMF);
2028         fpOffset   = parmOffset + (5*sizeof(gint32));
2029         if (fpOffset > 4096) {
2030                 s390_lr (code, s390_r12, STK_BASE);
2031                 baseReg = s390_r12;
2032                 while (fpOffset > 4096) {
2033                         s390_ahi (code, baseReg, 4096);
2034                         fpOffset   -= 4096;
2035                         parmOffset -= 4096;
2036                 }
2037         } else {
2038                 baseReg = STK_BASE;
2039         }
2040
2041         s390_stm  (code, s390_r2, s390_r6, baseReg, parmOffset);
2042         s390_std  (code, s390_f0, 0, baseReg, fpOffset);
2043         s390_std  (code, s390_f1, 0, baseReg, fpOffset+sizeof(gdouble));
2044         s390_std  (code, s390_f2, 0, baseReg, fpOffset+2*sizeof(gdouble));
2045         s390_basr (code, s390_r13, 0);
2046         s390_j    (code, 6);
2047         s390_word (code, cfg->method);
2048         s390_word (code, func);
2049         s390_l    (code, s390_r2, 0, s390_r13, 4);
2050         s390_la   (code, s390_r3, 0, baseReg, parmOffset);
2051         s390_lr   (code, s390_r4, STK_BASE);
2052         s390_ahi  (code, s390_r4, cfg->stack_usage);
2053         s390_l    (code, s390_r1, 0, s390_r13, 8);
2054         s390_basr (code, s390_r14, s390_r1);
2055         s390_ld   (code, s390_f2, 0, baseReg, fpOffset+2*sizeof(gdouble));
2056         s390_ld   (code, s390_f1, 0, baseReg, fpOffset+sizeof(gdouble));
2057         s390_ld   (code, s390_f0, 0, baseReg, fpOffset);
2058         s390_lm   (code, s390_r2, s390_r6, baseReg, parmOffset);
2059
2060         return code;
2061 }
2062
2063 /*========================= End of Function ========================*/
2064
2065 /*------------------------------------------------------------------*/
2066 /*                                                                  */
2067 /* Name         - mono_arch_instrument_epilog                       */
2068 /*                                                                  */
2069 /* Function     - Create an epilog that will handle the returned    */
2070 /*                values used in instrumentation.                   */
2071 /*                                                                  */
2072 /*------------------------------------------------------------------*/
2073
2074 void*
2075 mono_arch_instrument_epilog (MonoCompile *cfg, void *func, void *p, gboolean enable_arguments)
2076 {
2077         guchar     *code = p;
2078         int        save_mode = SAVE_NONE,
2079                    saveOffset;
2080         MonoMethod *method = cfg->method;
2081         int        rtype = mono_type_get_underlying_type (mono_method_signature (method)->ret)->type;
2082
2083         saveOffset = cfg->stack_usage - S390_TRACE_STACK_SIZE;
2084         if (method->save_lmf)
2085                 saveOffset -= sizeof(MonoLMF);
2086
2087 handle_enum:
2088         switch (rtype) {
2089         case MONO_TYPE_VOID:
2090                 /* special case string .ctor icall */
2091                 if (strcmp (".ctor", method->name) && method->klass == mono_defaults.string_class)
2092                         save_mode = SAVE_ONE;
2093                 else
2094                         save_mode = SAVE_NONE;
2095                 break;
2096         case MONO_TYPE_I8:
2097         case MONO_TYPE_U8:
2098                 save_mode = SAVE_TWO;
2099                 break;
2100         case MONO_TYPE_R4:
2101                 save_mode = SAVE_R4;
2102                 break;
2103         case MONO_TYPE_R8:
2104                 save_mode = SAVE_R8;
2105                 break;
2106         case MONO_TYPE_VALUETYPE:
2107                 if (mono_method_signature (method)->ret->data.klass->enumtype) {
2108                         rtype = mono_method_signature (method)->ret->data.klass->enum_basetype->type;
2109                         goto handle_enum;
2110                 }
2111                 save_mode = SAVE_STRUCT;
2112                 break;
2113         default:
2114                 save_mode = SAVE_ONE;
2115                 break;
2116         }
2117
2118         switch (save_mode) {
2119         case SAVE_TWO:
2120                 s390_stm (code, s390_r2, s390_r3, cfg->frame_reg, saveOffset);
2121                 if (enable_arguments) {
2122                         s390_lr (code, s390_r4, s390_r3);
2123                         s390_lr (code, s390_r3, s390_r2);
2124                 }
2125                 break;
2126         case SAVE_ONE:
2127                 s390_st (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2128                 if (enable_arguments) {
2129                         s390_lr (code, s390_r3, s390_r2);
2130                 }
2131                 break;
2132         case SAVE_R4:
2133                 s390_std (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2134                 if (enable_arguments) {
2135                         s390_ldebr (code, s390_f0, s390_f0);
2136                 }
2137                 break;
2138         case SAVE_R8:
2139                 s390_std (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2140                 break;
2141         case SAVE_STRUCT:
2142                 s390_st (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2143                 if (enable_arguments) {
2144                         s390_l (code, s390_r3, 0, cfg->frame_reg,
2145                                 S390_MINIMAL_STACK_SIZE+cfg->param_area);
2146                 }
2147                 break;
2148         case SAVE_NONE:
2149         default:
2150                 break;
2151         }
2152
2153         s390_basr (code, s390_r13, 0);
2154         s390_j    (code, 6);
2155         s390_word (code, cfg->method);
2156         s390_word (code, func);
2157         s390_l    (code, s390_r2, 0, s390_r13, 4);
2158         s390_l    (code, s390_r1, 0, s390_r13, 8);
2159         s390_basr (code, s390_r14, s390_r1);
2160
2161         switch (save_mode) {
2162         case SAVE_TWO:
2163                 s390_lm  (code, s390_r2, s390_r3, cfg->frame_reg, saveOffset);
2164                 break;
2165         case SAVE_ONE:
2166                 s390_l   (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2167                 break;
2168         case SAVE_R4:
2169         case SAVE_R8:
2170                 s390_ld  (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2171                 break;
2172         case SAVE_STRUCT:
2173                 s390_l   (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2174                 break;
2175         case SAVE_NONE:
2176         default:
2177                 break;
2178         }
2179
2180         return code;
2181 }
2182
2183 /*========================= End of Function ========================*/
2184
2185 /*------------------------------------------------------------------*/
2186 /*                                                                  */
2187 /* Name         - peephole_pass                                     */
2188 /*                                                                  */
2189 /* Function     - Form a peephole pass at the code looking for      */
2190 /*                simple optimizations.                             */
2191 /*                                                                  */
2192 /*------------------------------------------------------------------*/
2193
2194 static void
2195 peephole_pass (MonoCompile *cfg, MonoBasicBlock *bb)
2196 {
2197         MonoInst *ins, *last_ins = NULL;
2198         ins = bb->code;
2199
2200         while (ins) {
2201
2202                 switch (ins->opcode) {
2203                 case OP_MUL_IMM:
2204                         /* remove unnecessary multiplication with 1 */
2205                         if (ins->inst_imm == 1) {
2206                                 if (ins->dreg != ins->sreg1) {
2207                                         ins->opcode = OP_MOVE;
2208                                 } else {
2209                                         last_ins->next = ins->next;
2210                                         ins = ins->next;
2211                                         continue;
2212                                 }
2213                         }
2214                         break;
2215                 case OP_LOAD_MEMBASE:
2216                 case OP_LOADI4_MEMBASE:
2217                         /*
2218                          * OP_STORE_MEMBASE_REG reg, offset(basereg)
2219                          * OP_LOAD_MEMBASE offset(basereg), reg
2220                          */
2221                         if (last_ins && (last_ins->opcode == OP_STOREI4_MEMBASE_REG
2222                                          || last_ins->opcode == OP_STORE_MEMBASE_REG) &&
2223                             ins->inst_basereg == last_ins->inst_destbasereg &&
2224                             ins->inst_offset == last_ins->inst_offset) {
2225                                 if (ins->dreg == last_ins->sreg1) {
2226                                         last_ins->next = ins->next;
2227                                         ins = ins->next;
2228                                         continue;
2229                                 } else {
2230                                         ins->opcode = OP_MOVE;
2231                                         ins->sreg1 = last_ins->sreg1;
2232                                 }
2233
2234                         /*
2235                          * Note: reg1 must be different from the basereg in the second load
2236                          * OP_LOAD_MEMBASE offset(basereg), reg1
2237                          * OP_LOAD_MEMBASE offset(basereg), reg2
2238                          * -->
2239                          * OP_LOAD_MEMBASE offset(basereg), reg1
2240                          * OP_MOVE reg1, reg2
2241                          */
2242                         } if (last_ins && (last_ins->opcode == OP_LOADI4_MEMBASE
2243                                            || last_ins->opcode == OP_LOAD_MEMBASE) &&
2244                               ins->inst_basereg != last_ins->dreg &&
2245                               ins->inst_basereg == last_ins->inst_basereg &&
2246                               ins->inst_offset == last_ins->inst_offset) {
2247
2248                                 if (ins->dreg == last_ins->dreg) {
2249                                         last_ins->next = ins->next;
2250                                         ins = ins->next;
2251                                         continue;
2252                                 } else {
2253                                         ins->opcode = OP_MOVE;
2254                                         ins->sreg1 = last_ins->dreg;
2255                                 }
2256
2257                                 //g_assert_not_reached ();
2258
2259 #if 0
2260                         /*
2261                          * OP_STORE_MEMBASE_IMM imm, offset(basereg)
2262                          * OP_LOAD_MEMBASE offset(basereg), reg
2263                          * -->
2264                          * OP_STORE_MEMBASE_IMM imm, offset(basereg)
2265                          * OP_ICONST reg, imm
2266                          */
2267                         } else if (last_ins && (last_ins->opcode == OP_STOREI4_MEMBASE_IMM
2268                                                 || last_ins->opcode == OP_STORE_MEMBASE_IMM) &&
2269                                    ins->inst_basereg == last_ins->inst_destbasereg &&
2270                                    ins->inst_offset == last_ins->inst_offset) {
2271                                 //static int c = 0; printf ("MATCHX %s %d\n", cfg->method->name,c++);
2272                                 ins->opcode = OP_ICONST;
2273                                 ins->inst_c0 = last_ins->inst_imm;
2274                                 g_assert_not_reached (); // check this rule
2275 #endif
2276                         }
2277                         break;
2278                 case OP_LOADU1_MEMBASE:
2279                 case OP_LOADI1_MEMBASE:
2280                         if (last_ins && (last_ins->opcode == OP_STOREI1_MEMBASE_REG) &&
2281                                         ins->inst_basereg == last_ins->inst_destbasereg &&
2282                                         ins->inst_offset == last_ins->inst_offset) {
2283                                 ins->opcode = (ins->opcode == OP_LOADI1_MEMBASE) ? CEE_CONV_I1 : CEE_CONV_U1;
2284                                 ins->sreg1 = last_ins->sreg1;
2285                         }
2286                         break;
2287                 case OP_LOADU2_MEMBASE:
2288                 case OP_LOADI2_MEMBASE:
2289                         if (last_ins && (last_ins->opcode == OP_STOREI2_MEMBASE_REG) &&
2290                                         ins->inst_basereg == last_ins->inst_destbasereg &&
2291                                         ins->inst_offset == last_ins->inst_offset) {
2292                                 ins->opcode = (ins->opcode == OP_LOADI2_MEMBASE) ? CEE_CONV_I2 : CEE_CONV_U2;
2293                                 ins->sreg1 = last_ins->sreg1;
2294                         }
2295                         break;
2296                 case CEE_CONV_I4:
2297                 case CEE_CONV_U4:
2298                 case OP_MOVE:
2299                         /*
2300                          * OP_MOVE reg, reg
2301                          */
2302                         if (ins->dreg == ins->sreg1) {
2303                                 if (last_ins)
2304                                         last_ins->next = ins->next;
2305                                 ins = ins->next;
2306                                 continue;
2307                         }
2308                         /*
2309                          * OP_MOVE sreg, dreg
2310                          * OP_MOVE dreg, sreg
2311                          */
2312                         if (last_ins && last_ins->opcode == OP_MOVE &&
2313                             ins->sreg1 == last_ins->dreg &&
2314                             ins->dreg == last_ins->sreg1) {
2315                                 last_ins->next = ins->next;
2316                                 ins = ins->next;
2317                                 continue;
2318                         }
2319                         break;
2320                 }
2321                 last_ins = ins;
2322                 ins = ins->next;
2323         }
2324         bb->last_ins = last_ins;
2325 }
2326
2327 /*========================= End of Function ========================*/
2328
2329 /*------------------------------------------------------------------*/
2330 /*                                                                  */
2331 /* Name         - mono_arch_local_regalloc.                         */
2332 /*                                                                  */
2333 /* Function     - We first scan the list of instructions and we     */
2334 /*                save the liveness information of each register    */
2335 /*                (when the register is first used, when its value  */
2336 /*                is set etc.). We also reverse the list of instr-  */
2337 /*                uctions (in the InstList list) because assigning  */
2338 /*                registers backwards allows for more tricks to be  */
2339 /*                used.                                             */
2340 /*                                                                  */
2341 /*------------------------------------------------------------------*/
2342
2343 void
2344 mono_arch_local_regalloc (MonoCompile *cfg, MonoBasicBlock *bb)
2345 {
2346         mono_local_regalloc(cfg, bb);
2347 }
2348
2349 /*========================= End of Function ========================*/
2350
2351 /*------------------------------------------------------------------*/
2352 /*                                                                  */
2353 /* Name         - emit_float_to_int                                 */
2354 /*                                                                  */
2355 /* Function     - Create instructions which will convert a floating */
2356 /*                point value to integer.                           */
2357 /*                                                                  */
2358 /*------------------------------------------------------------------*/
2359
2360 static guchar*
2361 emit_float_to_int (MonoCompile *cfg, guchar *code, int dreg, int sreg, int size, gboolean is_signed)
2362 {
2363         /* sreg is a float, dreg is an integer reg. */
2364         if (is_signed) {
2365                 s390_cfdbr (code, dreg, 5, sreg);
2366                 switch (size) {
2367                         case 1:
2368                                 s390_lhi  (code, s390_r0, 0);
2369                                 s390_lhi  (code, s390_r13, 0xff);
2370                                 s390_ltr  (code, dreg, dreg);
2371                                 s390_jnl  (code, 4);
2372                                 s390_lhi  (code, s390_r0, 0x80);
2373                                 s390_nr   (code, dreg, s390_r13);
2374                                 s390_or   (code, dreg, s390_r0);
2375                                 break;
2376                 }
2377         } else {
2378                 short *o[1];
2379                 s390_basr   (code, s390_r13, 0);
2380                 s390_j      (code, 10);
2381                 s390_llong  (code, 0x41e0000000000000);
2382                 s390_llong  (code, 0x41f0000000000000);
2383                 s390_ldr    (code, s390_f15, sreg);
2384                 s390_cdb    (code, s390_f15, 0, s390_r13, 4);
2385                 s390_jl     (code, 0); CODEPTR(code, o[0]);
2386                 s390_sdb    (code, s390_f15, 0, s390_r13, 12);
2387                 s390_cfdbr  (code, dreg, 7, s390_f15);
2388                 s390_j      (code, 4);
2389                 PTRSLOT(code, o[0]);
2390                 s390_cfdbr  (code, dreg, 5, sreg);
2391                 switch (size) {
2392                         case 1:
2393                                 s390_lhi  (code, s390_r0, 0xff);
2394                                 s390_nr   (code, dreg, s390_r0);
2395                                 break;
2396                         case 2:
2397                                 s390_lhi  (code, s390_r0, -1);
2398                                 s390_srl  (code, s390_r0, 0, 16);
2399                                 s390_nr   (code, dreg, s390_r0);
2400                                 break;
2401                 }
2402         }
2403         return code;
2404 }
2405
2406 /*========================= End of Function ========================*/
2407
2408 /*------------------------------------------------------------------*/
2409 /*                                                                  */
2410 /* Name         - mono_arch_output_basic_block                      */
2411 /*                                                                  */
2412 /* Function     - Perform the "real" work of emitting instructions  */
2413 /*                that will do the work of in the basic block.      */
2414 /*                                                                  */
2415 /*------------------------------------------------------------------*/
2416
2417 void
2418 mono_arch_output_basic_block (MonoCompile *cfg, MonoBasicBlock *bb)
2419 {
2420         MonoInst *ins;
2421         MonoCallInst *call;
2422         guint offset;
2423         guint8 *code = cfg->native_code + cfg->code_len;
2424         MonoInst *last_ins = NULL;
2425         guint last_offset = 0;
2426         int max_len, cpos, src2;
2427
2428         if (cfg->opt & MONO_OPT_PEEPHOLE)
2429                 peephole_pass (cfg, bb);
2430
2431         /* we don't align basic blocks of loops on s390 */
2432
2433         if (cfg->verbose_level > 2)
2434                 g_print ("Basic block %d starting at offset 0x%x\n", bb->block_num, bb->native_offset);
2435
2436         cpos = bb->max_offset;
2437
2438         if (cfg->prof_options & MONO_PROFILE_COVERAGE) {
2439                 //MonoCoverageInfo *cov = mono_get_coverage_info (cfg->method);
2440                 //g_assert (!mono_compile_aot);
2441                 //cpos += 6;
2442                 //if (bb->cil_code)
2443                 //      cov->data [bb->dfn].iloffset = bb->cil_code - cfg->cil_code;
2444                 /* this is not thread save, but good enough */
2445                 /* fixme: howto handle overflows? */
2446                 //x86_inc_mem (code, &cov->data [bb->dfn].count);
2447         }
2448
2449         ins = bb->code;
2450         while (ins) {
2451                 offset = code - cfg->native_code;
2452
2453                 max_len = ((guint8 *)ins_get_spec (ins->opcode))[MONO_INST_LEN];
2454
2455                 if (offset > (cfg->code_size - max_len - 16)) {
2456                         cfg->code_size *= 2;
2457                         cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
2458                         code = cfg->native_code + offset;
2459                 }
2460
2461                 mono_debug_record_line_number (cfg, ins, offset);
2462
2463                 switch (ins->opcode) {
2464                 case OP_STOREI1_MEMBASE_IMM: {
2465                         s390_lhi (code, s390_r0, ins->inst_imm);
2466                         if (s390_is_uimm12(ins->inst_offset))
2467                                 s390_stc (code, s390_r0, 0, ins->inst_destbasereg, ins->inst_offset);
2468                         else {
2469                                 s390_basr (code, s390_r13, 0);
2470                                 s390_j    (code, 4);
2471                                 s390_word (code, ins->inst_offset);
2472                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2473                                 s390_stc  (code, s390_r0, s390_r13, ins->inst_destbasereg, 0);
2474                         }
2475                 }
2476                         break;
2477                 case OP_STOREI2_MEMBASE_IMM: {
2478                         s390_lhi (code, s390_r0, ins->inst_imm);
2479                         if (s390_is_uimm12(ins->inst_offset)) {
2480                                 s390_sth (code, s390_r0, 0, ins->inst_destbasereg, ins->inst_offset);
2481                         } else {
2482                                 s390_basr (code, s390_r13, 0);
2483                                 s390_j    (code, 4);
2484                                 s390_word (code, ins->inst_offset);
2485                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2486                                 s390_sth  (code, s390_r0, s390_r13, ins->inst_destbasereg, 0);
2487                         }
2488                 }
2489                         break;
2490                 case OP_STORE_MEMBASE_IMM:
2491                 case OP_STOREI4_MEMBASE_IMM: {
2492                         if (s390_is_imm16(ins->inst_imm)) {
2493                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2494                         } else {
2495                                 s390_basr (code, s390_r13, 0);
2496                                 s390_j    (code, 4);
2497                                 s390_word (code, ins->inst_imm);
2498                                 s390_l    (code, s390_r0, 0, s390_r13, 4);
2499                         }
2500                         if (s390_is_uimm12(ins->inst_offset)) {
2501                                 s390_st  (code, s390_r0, 0, ins->inst_destbasereg, ins->inst_offset);
2502                         } else {
2503                                 s390_basr (code, s390_r13, 0);
2504                                 s390_j    (code, 4);
2505                                 s390_word (code, ins->inst_offset);
2506                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2507                                 s390_st   (code, s390_r0, s390_r13, ins->inst_destbasereg, 0);
2508                         }
2509                 }
2510                         break;
2511                 case OP_STOREI1_MEMBASE_REG: {
2512                         if (s390_is_uimm12(ins->inst_offset)) {
2513                                 s390_stc  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
2514                         } else {
2515                                 s390_basr (code, s390_r13, 0);
2516                                 s390_j    (code, 4);
2517                                 s390_word (code, ins->inst_offset);
2518                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2519                                 s390_stc  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
2520                         }
2521                 }
2522                         break;
2523                 case OP_STOREI2_MEMBASE_REG: {
2524                         if (s390_is_uimm12(ins->inst_offset)) {
2525                                 s390_sth  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
2526                         } else {
2527                                 s390_basr (code, s390_r13, 0);
2528                                 s390_j    (code, 4);
2529                                 s390_word (code, ins->inst_offset);
2530                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2531                                 s390_sth  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
2532                         }
2533                 }
2534                         break;
2535                 case OP_STORE_MEMBASE_REG:
2536                 case OP_STOREI4_MEMBASE_REG: {
2537                         if (s390_is_uimm12(ins->inst_offset)) {
2538                                 s390_st   (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
2539                         } else {
2540                                 s390_basr (code, s390_r13, 0);
2541                                 s390_j    (code, 4);
2542                                 s390_word (code, ins->inst_offset);
2543                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2544                                 s390_st   (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
2545                         }
2546                 }
2547                         break;
2548                 case CEE_LDIND_I:
2549                 case CEE_LDIND_I4:
2550                 case CEE_LDIND_U4: {
2551                         s390_basr (code, s390_r13, 0);
2552                         s390_j    (code, 4);
2553                         s390_word (code, ins->inst_p0);
2554                         s390_l    (code, s390_r13, 0, s390_r13, 4);
2555                         s390_l    (code, ins->dreg, 0, s390_r13, 0);
2556                 }
2557                         break;
2558                 case OP_LOADU4_MEM:
2559                         g_assert_not_reached ();
2560                         break;
2561                 case OP_LOAD_MEMBASE:
2562                 case OP_LOADI4_MEMBASE:
2563                 case OP_LOADU4_MEMBASE: {
2564                         if (s390_is_uimm12(ins->inst_offset))
2565                                 s390_l    (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
2566                         else {
2567                                 if (s390_is_imm16(ins->inst_offset)) {
2568                                         s390_lhi (code, s390_r13, ins->inst_offset);
2569                                         s390_l   (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
2570                                 } else {
2571                                         s390_basr (code, s390_r13, 0);
2572                                         s390_j    (code, 4);
2573                                         s390_word (code, ins->inst_offset);
2574                                         s390_l    (code, s390_r13, 0, s390_r13, 4);
2575                                         s390_l    (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
2576                                 }
2577                         }
2578                 }
2579                         break;
2580                 case OP_LOADU1_MEMBASE: {
2581                         s390_lhi (code, s390_r0, 0);
2582                         if (s390_is_uimm12(ins->inst_offset))
2583                                 s390_ic   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
2584                         else {
2585                                 s390_basr (code, s390_r13, 0);
2586                                 s390_j    (code, 4);
2587                                 s390_word (code, ins->inst_offset);
2588                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2589                                 s390_ic   (code, s390_r0, s390_r13, ins->inst_basereg, 0);
2590                         }
2591                         s390_lr   (code, ins->dreg, s390_r0);
2592                 }
2593                         break;
2594                 case OP_LOADI1_MEMBASE: {
2595                         s390_lhi (code, s390_r0, 0);
2596                         if (s390_is_uimm12(ins->inst_offset))
2597                                 s390_ic   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
2598                         else {
2599                                 s390_basr (code, s390_r13, 0);
2600                                 s390_j    (code, 4);
2601                                 s390_word (code, ins->inst_offset);
2602                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2603                                 s390_ic   (code, s390_r0, s390_r13, ins->inst_basereg, 0);
2604                         }
2605                         s390_lhi  (code, s390_r13, 0x80);
2606                         s390_nr   (code, s390_r13, s390_r0);
2607                         s390_jz   (code, 5);
2608                         s390_lhi  (code, s390_r13, 0xff00);
2609                         s390_or   (code, s390_r0, s390_r13);
2610                         s390_lr   (code, ins->dreg, s390_r0);
2611                 }
2612                         break;
2613                 case OP_LOADU2_MEMBASE: {
2614                         s390_lhi (code, s390_r0, 0);
2615                         if (s390_is_uimm12(ins->inst_offset))
2616                                 s390_icm  (code, s390_r0, 3, ins->inst_basereg, ins->inst_offset);
2617                         else {
2618                                 s390_basr (code, s390_r13, 0);
2619                                 s390_j    (code, 4);
2620                                 s390_word (code, ins->inst_offset);
2621                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2622                                 s390_ar   (code, s390_r13, ins->inst_basereg);
2623                                 s390_icm  (code, s390_r0, 3, s390_r13, 0);
2624                         }
2625                         s390_lr  (code, ins->dreg, s390_r0);
2626                 }
2627                         break;
2628                 case OP_LOADI2_MEMBASE: {
2629                         s390_lhi (code, s390_r0, 0);
2630                         if (s390_is_uimm12(ins->inst_offset))
2631                                 s390_lh   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
2632                         else {
2633                                 s390_basr (code, s390_r13, 0);
2634                                 s390_j    (code, 4);
2635                                 s390_word (code, ins->inst_offset);
2636                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2637                                 s390_lh   (code, s390_r0, s390_r13, ins->inst_basereg, 0);
2638                         }
2639                         s390_lr  (code, ins->dreg, s390_r0);
2640                 }
2641                         break;
2642                 case CEE_CONV_I1: {
2643                         s390_lhi  (code, s390_r0, 0x80);
2644                         if (ins->dreg != ins->sreg1) {
2645                                 s390_lr   (code, ins->dreg, ins->sreg1);
2646                         }
2647                         s390_nr   (code, s390_r0, ins->sreg1);
2648                         s390_jz   (code, 7);
2649                         s390_lhi  (code, s390_r13, -1);
2650                         s390_sll  (code, s390_r13, 0, 8);
2651                         s390_or   (code, ins->dreg, s390_r13);
2652                 }
2653                         break;
2654                 case CEE_CONV_I2: {
2655                         s390_lhi  (code, s390_r0, 0x80);
2656                         s390_sll  (code, s390_r0, 0, 8);
2657                         if (ins->dreg != ins->sreg1) {
2658                                 s390_lr   (code, ins->dreg, ins->sreg1);
2659                         }
2660                         s390_nr   (code, s390_r0, ins->sreg1);
2661                         s390_jz   (code, 7);
2662                         s390_lhi  (code, s390_r13, -1);
2663                         s390_sll  (code, s390_r13, 0, 16);
2664                         s390_or   (code, ins->dreg, s390_r13);
2665                 }
2666                         break;
2667                 case CEE_CONV_U1: {
2668                         s390_lhi  (code, s390_r0, 0xff);
2669                         if (ins->dreg != ins->sreg1) {
2670                                 s390_lr   (code, ins->dreg, ins->sreg1);
2671                         }
2672                         s390_nr   (code, ins->dreg, s390_r0);
2673                 }
2674                         break;
2675                 case CEE_CONV_U2: {
2676                         s390_lhi  (code, s390_r0, -1);
2677                         s390_sll  (code, s390_r0, 0, 16);
2678                         s390_srl  (code, s390_r0, 0, 16);
2679                         if (ins->dreg != ins->sreg1) {
2680                                 s390_lr   (code, ins->dreg, ins->sreg1);
2681                         }
2682                         s390_nr   (code, ins->dreg, s390_r0);
2683                 }
2684                         break;
2685                 case OP_COMPARE: {
2686                         if ((ins->next) &&
2687                             (((ins->next->opcode >= CEE_BNE_UN) &&
2688                               (ins->next->opcode <= CEE_BLT_UN)) ||
2689                              ((ins->next->opcode >= OP_COND_EXC_NE_UN) &&
2690                               (ins->next->opcode <= OP_COND_EXC_LT_UN)) ||
2691                              ((ins->next->opcode == OP_CLT_UN) ||
2692                               (ins->next->opcode == OP_CGT_UN))))
2693                                 s390_clr  (code, ins->sreg1, ins->sreg2);
2694                         else
2695                                 s390_cr   (code, ins->sreg1, ins->sreg2);
2696                 }
2697                         break;
2698                 case OP_COMPARE_IMM: {
2699                         if (s390_is_imm16 (ins->inst_imm)) {
2700                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2701                                 if ((ins->next) &&
2702                                     (((ins->next->opcode >= CEE_BNE_UN) &&
2703                                       (ins->next->opcode <= CEE_BLT_UN)) ||
2704                                      ((ins->next->opcode >= OP_COND_EXC_NE_UN) &&
2705                                       (ins->next->opcode <= OP_COND_EXC_LT_UN)) ||
2706                                      ((ins->next->opcode == OP_CLT_UN) ||
2707                                       (ins->next->opcode == OP_CGT_UN))))
2708                                         s390_clr  (code, ins->sreg1, s390_r0);
2709                                 else
2710                                         s390_cr   (code, ins->sreg1, s390_r0);
2711                         }
2712                         else {
2713                                 s390_basr (code, s390_r13, 0);
2714                                 s390_j    (code, 4);
2715                                 s390_word (code, ins->inst_imm);
2716                                 if ((ins->next) &&
2717                                     (((ins->next->opcode >= CEE_BNE_UN) &&
2718                                       (ins->next->opcode <= CEE_BLT_UN)) ||
2719                                      ((ins->next->opcode >= OP_COND_EXC_NE_UN) &&
2720                                       (ins->next->opcode <= OP_COND_EXC_LT_UN)) ||
2721                                      ((ins->next->opcode == OP_CLT_UN) ||
2722                                       (ins->next->opcode == OP_CGT_UN))))
2723                                         s390_cl   (code, ins->sreg1, 0, s390_r13, 4);
2724                                 else
2725                                         s390_c    (code, ins->sreg1, 0, s390_r13, 4);
2726                         }
2727                 }
2728                         break;
2729                 case CEE_BREAK: {
2730                         mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS, mono_arch_break);
2731                         s390_brasl (code, s390_r14, 0);
2732                 }
2733                         break;
2734                 case OP_ADDCC: {
2735                         CHECK_SRCDST_COM;
2736                         s390_alr  (code, ins->dreg, src2);
2737                 }
2738                         break;
2739                 case CEE_ADD: {
2740                         CHECK_SRCDST_COM;
2741                         s390_ar   (code, ins->dreg, src2);
2742                 }
2743                         break;
2744                 case OP_ADC: {
2745                         CHECK_SRCDST_COM;
2746                         s390_alcr (code, ins->dreg, src2);
2747                 }
2748                         break;
2749                 case OP_ADD_IMM: {
2750                         if (ins->dreg != ins->sreg1) {
2751                                 s390_lr   (code, ins->dreg, ins->sreg1);
2752                         }
2753                         if ((ins->next) &&
2754                             (ins->next->opcode == OP_ADC_IMM)) {
2755                                 s390_basr (code, s390_r13, 0);
2756                                 s390_j    (code, 4);
2757                                 s390_word (code, ins->inst_imm);
2758                                 s390_a (code, ins->dreg, 0, s390_r13, 4);
2759                         } else {
2760                                 if (s390_is_imm16 (ins->inst_imm)) {
2761                                         s390_ahi  (code, ins->dreg, ins->inst_imm);
2762                                 } else {
2763                                         s390_basr (code, s390_r13, 0);
2764                                         s390_j    (code, 4);
2765                                         s390_word (code, ins->inst_imm);
2766                                         s390_a (code, ins->dreg, 0, s390_r13, 4);
2767                                 }
2768                         }
2769                 }
2770                         break;
2771                 case OP_ADDCC_IMM: {
2772                         if ((ins->next) &&
2773                             (ins->next->opcode == OP_ADC_IMM)) {
2774                                 s390_basr (code, s390_r13, 0);
2775                                 s390_j    (code, 4);
2776                                 s390_word (code, ins->inst_imm);
2777                                 if (ins->dreg != ins->sreg1) {
2778                                         s390_lr   (code, ins->dreg, ins->sreg1);
2779                                 }
2780                                 s390_al   (code, ins->dreg, 0, s390_r13, 4);
2781                         } else {
2782                                 if (s390_is_imm16 (ins->inst_imm)) {
2783                                         if (ins->dreg != ins->sreg1) {
2784                                                 s390_lr   (code, ins->dreg, ins->sreg1);
2785                                         }
2786                                         s390_lhi  (code, s390_r0, ins->inst_imm);
2787                                         s390_alcr (code, ins->dreg, s390_r0);
2788                                 } else {
2789                                         s390_basr (code, s390_r13, 0);
2790                                         s390_j    (code, 4);
2791                                         s390_word (code, ins->inst_imm);
2792                                         if (ins->dreg != ins->sreg1) {
2793                                                 s390_lr   (code, ins->dreg, ins->sreg1);
2794                                         }
2795                                         s390_al   (code, ins->dreg, 0, s390_r13, 4);
2796                                 }
2797                         }
2798                 }
2799                         break;
2800                 case OP_ADC_IMM: {
2801                         if (s390_is_imm16 (ins->inst_imm)) {
2802                                 if (ins->dreg != ins->sreg1) {
2803                                         s390_lr   (code, ins->dreg, ins->sreg1);
2804                                 }
2805                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2806                                 s390_alcr (code, ins->dreg, s390_r0);
2807                         } else {
2808                                 s390_basr (code, s390_r13, 0);
2809                                 s390_j    (code, 4);
2810                                 s390_word (code, ins->inst_imm);
2811                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2812                                 s390_alcr (code, ins->dreg, s390_r13);
2813                         }
2814                 }
2815                         break;
2816                 case CEE_ADD_OVF: {
2817                         CHECK_SRCDST_COM;
2818                         s390_ar   (code, ins->dreg, src2);
2819                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2820                 }
2821                         break;
2822                 case CEE_ADD_OVF_UN: {
2823                         CHECK_SRCDST_COM;
2824                         s390_alr  (code, ins->dreg, src2);
2825                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
2826                 }
2827                         break;
2828                 case OP_LADD: {
2829                         short int *o[1];
2830                         s390_alr  (code, s390_r0, ins->sreg1);
2831                         s390_jnc  (code, 4);
2832                         s390_ahi  (code, s390_r1, 1);
2833                         s390_ar   (code, s390_r1, ins->sreg2);
2834                         s390_lr   (code, ins->dreg, s390_r0);
2835                         s390_lr   (code, ins->dreg+1, s390_r1);
2836                 }
2837                         break;
2838                 case OP_LADD_OVF: {
2839                         short int *o[1];
2840                         s390_alr  (code, s390_r0, ins->sreg1);
2841                         s390_jnc  (code, 0); CODEPTR(code, o[0]);
2842                         s390_ahi  (code, s390_r1, 1);
2843                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2844                         PTRSLOT   (code, o[0]);
2845                         s390_ar   (code, s390_r1, ins->sreg2);
2846                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2847                         s390_lr   (code, ins->dreg, s390_r0);
2848                         s390_lr   (code, ins->dreg+1, s390_r1);
2849                 }
2850                         break;
2851                 case OP_LADD_OVF_UN: {
2852                         s390_alr  (code, s390_r0, ins->sreg1);
2853                         s390_alcr (code, s390_r1, ins->sreg2);
2854                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
2855                         s390_lr   (code, ins->dreg, s390_r0);
2856                         s390_lr   (code, ins->dreg+1, s390_r1);
2857                 }
2858                         break;
2859                 case OP_ADD_OVF_CARRY: {
2860                         CHECK_SRCDST_COM;
2861                         s390_lhi  (code, s390_r0, 0);
2862                         s390_lr   (code, s390_r1, s390_r0);
2863                         s390_alcr (code, s390_r0, s390_r1);
2864                         s390_ar   (code, ins->dreg, src2);
2865                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2866                         s390_ar   (code, ins->dreg, s390_r0);
2867                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2868                 }
2869                         break;
2870                 case OP_ADD_OVF_UN_CARRY: {
2871                         CHECK_SRCDST_COM;
2872                         s390_alcr (code, ins->dreg, src2);
2873                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
2874                 }
2875                         break;
2876                 case OP_SUBCC: {
2877                         CHECK_SRCDST_NCOM;
2878                         s390_slr (code, ins->dreg, src2);
2879                 }
2880                         break;
2881                 case CEE_SUB: {
2882                         CHECK_SRCDST_NCOM;
2883                         s390_sr   (code, ins->dreg, src2);
2884                 }
2885                         break;
2886                 case OP_SBB: {
2887                         CHECK_SRCDST_NCOM;
2888                         s390_slbr (code, ins->dreg, src2);
2889                 }
2890                         break;
2891                 case OP_SUBCC_IMM: {
2892                         if (s390_is_imm16 (-ins->inst_imm)) {
2893                                 if (ins->dreg != ins->sreg1) {
2894                                         s390_lr   (code, ins->dreg, ins->sreg1);
2895                                 }
2896                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2897                                 s390_slr  (code, ins->dreg, s390_r0);
2898                         } else {
2899                                 s390_basr (code, s390_r13, 0);
2900                                 s390_j    (code, 4);
2901                                 s390_word (code, ins->inst_imm);
2902                                 if (ins->dreg != ins->sreg1) {
2903                                         s390_lr   (code, ins->dreg, ins->sreg1);
2904                                 }
2905                                 s390_sl   (code, ins->dreg, 0, s390_r13, 4);
2906                         }
2907                 }
2908                         break;
2909                 case OP_SUB_IMM: {
2910                         if (s390_is_imm16 (-ins->inst_imm)) {
2911                                 if (ins->dreg != ins->sreg1) {
2912                                         s390_lr   (code, ins->dreg, ins->sreg1);
2913                                 }
2914                                 s390_ahi  (code, ins->dreg, -ins->inst_imm);
2915                         } else {
2916                                 s390_basr (code, s390_r13, 0);
2917                                 s390_j    (code, 4);
2918                                 s390_word (code, ins->inst_imm);
2919                                 if (ins->dreg != ins->sreg1) {
2920                                         s390_lr   (code, ins->dreg, ins->sreg1);
2921                                 }
2922                                 s390_s    (code, ins->dreg, 0, s390_r13, 4);
2923                         }
2924                 }
2925                         break;
2926                 case OP_SBB_IMM: {
2927                         if (ins->dreg != ins->sreg1) {
2928                                 s390_lr    (code, ins->dreg, ins->sreg1);
2929                         }
2930                         if (s390_is_imm16 (-ins->inst_imm)) {
2931                                 s390_lhi   (code, s390_r0, ins->inst_imm);
2932                                 s390_slbr  (code, ins->dreg, s390_r0);
2933                         } else {
2934                                 s390_basr (code, s390_r13, 0);
2935                                 s390_j    (code, 4);
2936                                 s390_word (code, ins->inst_imm);
2937                                 s390_slb  (code, ins->dreg, 0, s390_r13, 4);
2938                         }
2939                 }
2940                         break;
2941                 case CEE_SUB_OVF: {
2942                         CHECK_SRCDST_NCOM;
2943                         s390_sr   (code, ins->dreg, src2);
2944                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2945                 }
2946                         break;
2947                 case CEE_SUB_OVF_UN: {
2948                         CHECK_SRCDST_NCOM;
2949                         s390_slr  (code, ins->dreg, src2);
2950                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
2951                 }
2952                         break;
2953                 case OP_LSUB: {
2954                         s390_lr   (code, s390_r14, ins->sreg2);
2955                         s390_slr  (code, s390_r0, ins->sreg1);
2956                         s390_jnl  (code, 4);
2957                         s390_ahi  (code, s390_r14, 1);
2958                         s390_sr   (code, s390_r1, s390_r14);
2959                         s390_lr   (code, ins->dreg, s390_r0);
2960                         s390_lr   (code, ins->dreg+1, s390_r1);
2961                 }
2962                         break;
2963                 case OP_LSUB_OVF: {
2964                         short int *o[1];
2965                         s390_lr   (code, s390_r14, ins->sreg2);
2966                         s390_slr  (code, s390_r0, ins->sreg1);
2967                         s390_jnl  (code, 0); CODEPTR(code, o[0]);
2968                         s390_ahi  (code, s390_r14, 1);
2969                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2970                         PTRSLOT   (code, o[0]);
2971                         s390_sr   (code, s390_r1, s390_r14);
2972                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2973                         s390_lr   (code, ins->dreg, s390_r0);
2974                         s390_lr   (code, ins->dreg+1, s390_r1);
2975                 }
2976                         break;
2977                 case OP_LSUB_OVF_UN: {
2978                         s390_slr  (code, s390_r0, ins->sreg1);
2979                         s390_slbr (code, s390_r1, ins->sreg2);
2980                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, "OverflowException");
2981                         s390_lr   (code, ins->dreg, s390_r0);
2982                         s390_lr   (code, ins->dreg+1, s390_r1);
2983                 }
2984                         break;
2985                 case OP_SUB_OVF_CARRY: {
2986                         CHECK_SRCDST_NCOM;
2987                         s390_lhi  (code, s390_r0, 0);
2988                         s390_lr   (code, s390_r1, s390_r0);
2989                         s390_slbr (code, s390_r0, s390_r1);
2990                         s390_sr   (code, ins->dreg, src2);
2991                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2992                         s390_ar   (code, ins->dreg, s390_r0);
2993                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2994                 }
2995                         break;
2996                 case OP_SUB_OVF_UN_CARRY: {
2997                         CHECK_SRCDST_NCOM;
2998                         s390_slbr (code, ins->dreg, src2);
2999                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
3000                 }
3001                         break;
3002                 case CEE_AND: {
3003                         if (ins->sreg1 == ins->dreg) {
3004                                 s390_nr   (code, ins->dreg, ins->sreg2);
3005                         }
3006                         else {
3007                                 if (ins->sreg2 == ins->dreg) {
3008                                         s390_nr  (code, ins->dreg, ins->sreg1);
3009                                 }
3010                                 else {
3011                                         s390_lr  (code, ins->dreg, ins->sreg1);
3012                                         s390_nr  (code, ins->dreg, ins->sreg2);
3013                                 }
3014                         }
3015                 }
3016                         break;
3017                 case OP_AND_IMM: {
3018                         if (s390_is_imm16 (ins->inst_imm)) {
3019                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3020                                 if (ins->dreg != ins->sreg1) {
3021                                         s390_lr   (code, ins->dreg, ins->sreg1);
3022                                 }
3023                                 s390_nr   (code, ins->dreg, s390_r0);
3024                         } else {
3025                                 s390_basr (code, s390_r13, 0);
3026                                 s390_j    (code, 4);
3027                                 s390_word (code, ins->inst_imm);
3028                                 if (ins->dreg != ins->sreg1) {
3029                                         s390_lr   (code, ins->dreg, ins->sreg1);
3030                                 }
3031                                 s390_n    (code, ins->dreg, 0, s390_r13, 4);
3032                         }
3033                 }
3034                         break;
3035                 case CEE_DIV: {
3036                         s390_lr   (code, s390_r0, ins->sreg1);
3037                         s390_srda (code, s390_r0, 0, 32);
3038                         s390_dr   (code, s390_r0, ins->sreg2);
3039                         s390_lr   (code, ins->dreg, s390_r1);
3040                 }
3041                         break;
3042                 case CEE_DIV_UN: {
3043                         s390_lr   (code, s390_r0, ins->sreg1);
3044                         s390_srdl (code, s390_r0, 0, 32);
3045                         s390_dlr  (code, s390_r0, ins->sreg2);
3046                         s390_lr   (code, ins->dreg, s390_r1);
3047                 }
3048                         break;
3049                 case OP_DIV_IMM: {
3050                         if (s390_is_imm16 (ins->inst_imm)) {
3051                                 s390_lhi  (code, s390_r13, ins->inst_imm);
3052                                 s390_lr   (code, s390_r0, ins->sreg1);
3053                         } else {
3054                                 s390_basr (code, s390_r13, 0);
3055                                 s390_j    (code, 4);
3056                                 s390_word (code, ins->inst_imm);
3057                                 s390_lr   (code, s390_r0, ins->sreg1);
3058                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3059                         }
3060                         s390_srda (code, s390_r0, 0, 32);
3061                         s390_dr   (code, s390_r0, s390_r13);
3062                         s390_lr   (code, ins->dreg, s390_r1);
3063                 }
3064                         break;
3065                 case CEE_REM: {
3066                         s390_lr   (code, s390_r0, ins->sreg1);
3067                         s390_srda (code, s390_r0, 0, 32);
3068                         s390_dr   (code, s390_r0, ins->sreg2);
3069                         s390_lr   (code, ins->dreg, s390_r0);
3070                         break;
3071                 case CEE_REM_UN:
3072                         s390_lr   (code, s390_r0, ins->sreg1);
3073                         s390_srdl (code, s390_r0, 0, 32);
3074                         s390_dlr  (code, s390_r0, ins->sreg2);
3075                         s390_lr   (code, ins->dreg, s390_r0);
3076                 }
3077                         break;
3078                 case OP_REM_IMM: {
3079                         if (s390_is_imm16 (ins->inst_imm)) {
3080                                 s390_lhi  (code, s390_r13, ins->inst_imm);
3081                                 s390_lr   (code, s390_r0, ins->sreg1);
3082                         } else {
3083                                 s390_basr (code, s390_r13, 0);
3084                                 s390_j    (code, 4);
3085                                 s390_word (code, ins->inst_imm);
3086                                 s390_lr   (code, s390_r0, ins->sreg1);
3087                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3088                         }
3089                         s390_srda (code, s390_r0, 0, 32);
3090                         s390_dr   (code, s390_r0, s390_r13);
3091                         s390_lr   (code, ins->dreg, s390_r0);
3092                 }
3093                         break;
3094                 case CEE_OR: {
3095                         if (ins->sreg1 == ins->dreg) {
3096                                 s390_or   (code, ins->dreg, ins->sreg2);
3097                         }
3098                         else {
3099                                 if (ins->sreg2 == ins->dreg) {
3100                                         s390_or  (code, ins->dreg, ins->sreg1);
3101                                 }
3102                                 else {
3103                                         s390_lr  (code, ins->dreg, ins->sreg1);
3104                                         s390_or  (code, ins->dreg, ins->sreg2);
3105                                 }
3106                         }
3107                 }
3108                         break;
3109                 case OP_OR_IMM: {
3110                         if (s390_is_imm16 (ins->inst_imm)) {
3111                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3112                                 if (ins->dreg != ins->sreg1) {
3113                                         s390_lr   (code, ins->dreg, ins->sreg1);
3114                                 }
3115                                 s390_or   (code, ins->dreg, s390_r0);
3116                         } else {
3117                                 s390_basr (code, s390_r13, 0);
3118                                 s390_j    (code, 4);
3119                                 s390_word (code, ins->inst_imm);
3120                                 if (ins->dreg != ins->sreg1) {
3121                                         s390_lr   (code, ins->dreg, ins->sreg1);
3122                                 }
3123                                 s390_o    (code, ins->dreg, 0, s390_r13, 4);
3124                         }
3125                 }
3126                         break;
3127                 case CEE_XOR: {
3128                         if (ins->sreg1 == ins->dreg) {
3129                                 s390_xr   (code, ins->dreg, ins->sreg2);
3130                         }
3131                         else {
3132                                 if (ins->sreg2 == ins->dreg) {
3133                                         s390_xr  (code, ins->dreg, ins->sreg1);
3134                                 }
3135                                 else {
3136                                         s390_lr  (code, ins->dreg, ins->sreg1);
3137                                         s390_xr  (code, ins->dreg, ins->sreg2);
3138                                 }
3139                         }
3140                 }
3141                         break;
3142                 case OP_XOR_IMM: {
3143                         if (s390_is_imm16 (ins->inst_imm)) {
3144                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3145                                 if (ins->dreg != ins->sreg1) {
3146                                         s390_lr   (code, ins->dreg, ins->sreg1);
3147                                 }
3148                                 s390_xr   (code, ins->dreg, s390_r0);
3149                         } else {
3150                                 s390_basr (code, s390_r13, 0);
3151                                 s390_j    (code, 4);
3152                                 s390_word (code, ins->inst_imm);
3153                                 if (ins->dreg != ins->sreg1) {
3154                                         s390_lr   (code, ins->dreg, ins->sreg1);
3155                                 }
3156                                 s390_x    (code, ins->dreg, 0, s390_r13, 4);
3157                         }
3158                 }
3159                         break;
3160                 case CEE_SHL: {
3161                         CHECK_SRCDST_NCOM;
3162                         s390_sll  (code, ins->dreg, src2, 0);
3163                 }
3164                         break;
3165                 case OP_SHL_IMM: {
3166                         if (ins->sreg1 != ins->dreg) {
3167                                 s390_lr   (code, ins->dreg, ins->sreg1);
3168                         }
3169                         s390_sll  (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3170                 }
3171                         break;
3172                 case CEE_SHR: {
3173                         CHECK_SRCDST_NCOM;
3174                         s390_sra  (code, ins->dreg, src2, 0);
3175                 }
3176                         break;
3177                 case OP_SHR_IMM: {
3178                         if (ins->sreg1 != ins->dreg) {
3179                                 s390_lr   (code, ins->dreg, ins->sreg1);
3180                         }
3181                         s390_sra  (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3182                 }
3183                         break;
3184                 case OP_SHR_UN_IMM: {
3185                         if (ins->sreg1 != ins->dreg) {
3186                                 s390_lr   (code, ins->dreg, ins->sreg1);
3187                         }
3188                         s390_srl  (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3189                 }
3190                         break;
3191                 case CEE_SHR_UN: {
3192                         CHECK_SRCDST_NCOM;
3193                         s390_srl  (code, ins->dreg, src2, 0);
3194                 }
3195                         break;
3196                 case CEE_NOT: {
3197                         if (ins->sreg1 != ins->dreg) {
3198                                 s390_lr   (code, ins->dreg, ins->sreg1);
3199                         }
3200                         s390_lhi (code, s390_r0, -1);
3201                         s390_xr  (code, ins->dreg, s390_r0);
3202                 }
3203                         break;
3204                 case CEE_NEG: {
3205                         s390_lcr (code, ins->dreg, ins->sreg1);
3206                 }
3207                         break;
3208                 case CEE_MUL: {
3209                         if (ins->sreg1 == ins->dreg) {
3210                                 s390_msr  (code, ins->dreg, ins->sreg2);
3211                         }
3212                         else {
3213                                 if (ins->sreg2 == ins->dreg) {
3214                                         s390_msr (code, ins->dreg, ins->sreg1);
3215                                 }
3216                                 else {
3217                                         s390_lr  (code, ins->dreg, ins->sreg1);
3218                                         s390_msr (code, ins->dreg, ins->sreg2);
3219                                 }
3220                         }
3221                 }
3222                         break;
3223                 case OP_MUL_IMM: {
3224                         if (s390_is_imm16 (ins->inst_imm)) {
3225                                 s390_lhi  (code, s390_r13, ins->inst_imm);
3226                         } else {
3227                                 s390_basr (code, s390_r13, 0);
3228                                 s390_j    (code, 4);
3229                                 s390_word (code, ins->inst_imm);
3230 //                              if (ins->dreg != ins->sreg1) {
3231 //                                      s390_lr   (code, ins->dreg, ins->sreg1);
3232 //                              }
3233                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3234                         }
3235                         if (ins->dreg != ins->sreg1) {
3236                                 s390_lr   (code, ins->dreg, ins->sreg1);
3237                         }
3238                         s390_msr  (code, ins->dreg, s390_r13);
3239                 }
3240                         break;
3241                 case CEE_MUL_OVF: {
3242                         short int *o[2];
3243                         s390_ltr  (code, s390_r1, ins->sreg1);
3244                         s390_jz   (code, 0); CODEPTR(code, o[0]);
3245                         s390_ltr  (code, s390_r0, ins->sreg2);
3246                         s390_jnz  (code, 6);
3247                         s390_lhi  (code, s390_r1, 0);
3248                         s390_j    (code, 0); CODEPTR(code, o[1]);
3249                         s390_xr   (code, s390_r0, s390_r1);
3250                         s390_msr  (code, s390_r1, ins->sreg2);
3251                         s390_xr   (code, s390_r0, s390_r1);
3252                         s390_srl  (code, s390_r0, 0, 31);
3253                         s390_ltr  (code, s390_r0, s390_r0);
3254                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3255                         PTRSLOT   (code, o[0]);
3256                         PTRSLOT   (code, o[1]);
3257                         s390_lr   (code, ins->dreg, s390_r1);
3258                 }
3259                         break;
3260                 case CEE_MUL_OVF_UN: {
3261                         s390_lhi  (code, s390_r0, 0);
3262                         s390_lr   (code, s390_r1, ins->sreg1);
3263                         s390_mlr  (code, s390_r0, ins->sreg2);
3264                         s390_ltr  (code, s390_r0, s390_r0);
3265                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3266                         s390_lr   (code, ins->dreg, s390_r1);
3267                 }
3268                         break;
3269                 case OP_LMUL: {
3270                         s390_l    (code, s390_r0, 0, ins->sreg1, 4);
3271                         s390_srda (code, s390_r0, 0, 32);
3272                         s390_m    (code, s390_r0, 0, ins->sreg2, 4);
3273                         s390_l    (code, s390_r0, 0, ins->sreg1, 4);
3274                         s390_srl  (code, s390_r0, 0, 31);
3275                         s390_a    (code, s390_r0, 0, ins->sreg1, 0);
3276                         s390_l    (code, s390_r13, 0, ins->sreg2, 0);
3277                         s390_srl  (code, s390_r13, 0, 31);
3278                         s390_ms   (code, s390_r13, 0, ins->sreg1, 4);
3279                         s390_ar   (code, s390_r0, s390_r13);
3280                         s390_st   (code, s390_r0, 0, ins->dreg, 0);
3281                         s390_st   (code, s390_r1, 0, ins->dreg, 4);
3282                 }
3283                         break;
3284                 case OP_ICONST:
3285                 case OP_SETREGIMM: {
3286                         if (s390_is_imm16(ins->inst_c0)) {
3287                                 s390_lhi  (code, ins->dreg, ins->inst_c0);
3288                         } else {
3289                                 s390_basr (code, s390_r13, 0);
3290                                 s390_j    (code, 4);
3291                                 s390_word (code, ins->inst_c0);
3292                                 s390_l    (code, ins->dreg, 0, s390_r13, 4);
3293                         }
3294                 }
3295                         break;
3296                 case OP_AOTCONST: {
3297                         s390_basr (code, s390_r13, 0);
3298                         s390_j    (code, 4);
3299                         mono_add_patch_info (cfg, code - cfg->native_code,
3300                                 (MonoJumpInfoType)ins->inst_i1, ins->inst_p0);
3301                         s390_word (code, 0);
3302                         s390_l    (code,ins->dreg, 0, s390_r13, 4);
3303                 }
3304                         break;
3305                 case CEE_CONV_I4:
3306                 case CEE_CONV_U4:
3307                 case OP_MOVE:
3308                 case OP_SETREG: {
3309                         if (ins->dreg != ins->sreg1) {
3310                                 s390_lr (code, ins->dreg, ins->sreg1);
3311                         }
3312                 }
3313                         break;
3314                 case OP_SETLRET: {
3315                         int saved = ins->sreg1;
3316                         if (ins->sreg1 == s390_r2) {
3317                                 s390_lr (code, s390_r0, ins->sreg1);
3318                                 saved = s390_r0;
3319                         }
3320                         if (ins->sreg2 != s390_r2)
3321                                 s390_lr (code, s390_r2, ins->sreg2);
3322                         if (saved != s390_r3)
3323                                 s390_lr (code, s390_r3, saved);
3324                         break;
3325                 }
3326                 case OP_SETFREG:
3327                 case OP_FMOVE: {
3328                         if (ins->dreg != ins->sreg1) {
3329                                 s390_ldr   (code, ins->dreg, ins->sreg1);
3330                         }
3331                 }
3332                         break;
3333                 case OP_S390_SETF4RET: {
3334                         s390_ledbr (code, ins->dreg, ins->sreg1);
3335                 }
3336                         break;
3337                 case OP_TLS_GET: {
3338                         if (s390_is_imm16 (ins->inst_offset)) {
3339                                 s390_lhi (code, s390_r13, ins->inst_offset);
3340                         } else {
3341                                 s390_bras (code, s390_r13, 0);
3342                                 s390_j    (code, 4);
3343                                 s390_word (code, ins->inst_offset);
3344                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3345                         }
3346                         s390_ear (code, s390_r1, 0);
3347                         s390_l   (code, ins->dreg, s390_r13, s390_r1, 0);
3348                 }
3349                         break;
3350                 case OP_FCONV_TO_R4: {
3351                         NOT_IMPLEMENTED("OP_FCONV_TO_R4");
3352                         if ((ins->next) &&
3353                              (ins->next->opcode != OP_FMOVE) &&
3354                              (ins->next->opcode != OP_STORER4_MEMBASE_REG))
3355                                 s390_ledbr (code, ins->dreg, ins->sreg1);
3356                 }
3357                         break;
3358                 case CEE_JMP: {
3359                         if (cfg->method->save_lmf)
3360                                 restoreLMF(code, cfg->frame_reg, cfg->stack_usage);
3361
3362                         if (cfg->flags & MONO_CFG_HAS_TAIL) {
3363                                 code = emit_load_volatile_registers(code, cfg);
3364                         }
3365
3366                         code = backUpStackPtr(cfg, code, STK_BASE);
3367                         s390_l   (code, s390_r14, 0, STK_BASE, S390_RET_ADDR_OFFSET);
3368                         mono_add_patch_info (cfg, code - cfg->native_code,
3369                                              MONO_PATCH_INFO_METHOD_JUMP,
3370                                              ins->inst_p0);
3371                         s390_jcl (code, S390_CC_UN, 0);
3372                 }
3373                         break;
3374                 case OP_CHECK_THIS: {
3375                         /* ensure ins->sreg1 is not NULL */
3376                         s390_icm (code, s390_r0, 15, ins->sreg1, 0);
3377                 }
3378                         break;
3379                 case OP_ARGLIST: {
3380                         int offset = cfg->sig_cookie + cfg->stack_usage;
3381
3382                         if (s390_is_imm16 (offset))
3383                                 s390_lhi  (code, s390_r0, offset);
3384                         else {
3385                                 s390_basr (code, s390_r13, 0);
3386                                 s390_j    (code, 4);
3387                                 s390_word (code, offset);
3388                                 s390_l    (code, s390_r0, 0, s390_r13, 0);
3389                         }
3390                         s390_ar   (code, s390_r0, cfg->frame_reg);
3391                         s390_st   (code, s390_r0, 0, ins->sreg1, 0);
3392                 }
3393                         break;
3394                 case OP_FCALL: {
3395                         call = (MonoCallInst*)ins;
3396                         if (ins->flags & MONO_INST_HAS_METHOD)
3397                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_METHOD,
3398                                                      call->method);
3399                         else
3400                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS,
3401                                                      call->fptr);
3402                         s390_brasl (code, s390_r14, 0);
3403                         if (call->signature->ret->type == MONO_TYPE_R4)
3404                                 s390_ldebr (code, s390_f0, s390_f0);
3405                 }
3406                         break;
3407                 case OP_LCALL:
3408                 case OP_VCALL:
3409                 case OP_VOIDCALL:
3410                 case CEE_CALL: {
3411                         call = (MonoCallInst*)ins;
3412                         if (ins->flags & MONO_INST_HAS_METHOD)
3413                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_METHOD, call->method);
3414                         else
3415                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS, call->fptr);
3416                         s390_brasl (code, s390_r14, 0);
3417                 }
3418                         break;
3419                 case OP_FCALL_REG: {
3420                         call = (MonoCallInst*)ins;
3421                         s390_lr   (code, s390_r1, ins->sreg1);
3422                         s390_basr (code, s390_r14, s390_r1);
3423                         if (call->signature->ret->type == MONO_TYPE_R4)
3424                                 s390_ldebr (code, s390_f0, s390_f0);
3425                 }
3426                         break;
3427                 case OP_LCALL_REG:
3428                 case OP_VCALL_REG:
3429                 case OP_VOIDCALL_REG:
3430                 case OP_CALL_REG: {
3431                         s390_lr   (code, s390_r1, ins->sreg1);
3432                         s390_basr (code, s390_r14, s390_r1);
3433                 }
3434                         break;
3435                 case OP_FCALL_MEMBASE: {
3436                         call = (MonoCallInst*)ins;
3437                         s390_l    (code, s390_r1, 0, ins->sreg1, ins->inst_offset);
3438                         s390_basr (code, s390_r14, s390_r1);
3439                         if (call->signature->ret->type == MONO_TYPE_R4)
3440                                 s390_ldebr (code, s390_f0, s390_f0);
3441                 }
3442                         break;
3443                 case OP_LCALL_MEMBASE:
3444                 case OP_VCALL_MEMBASE:
3445                 case OP_VOIDCALL_MEMBASE:
3446                 case OP_CALL_MEMBASE: {
3447                         s390_l    (code, s390_r1, 0, ins->sreg1, ins->inst_offset);
3448                         s390_basr (code, s390_r14, s390_r1);
3449                 }
3450                         break;
3451                 case OP_OUTARG:
3452                         g_assert_not_reached ();
3453                         break;
3454                 case OP_LOCALLOC: {
3455                         /*------------------------------------------*/
3456                         /* To allocate space on the stack we have   */
3457                         /* to allow room for parameters passed in   */
3458                         /* calls, the backchain pointer and round   */
3459                         /* it to our stack alignment requirements   */
3460                         /*------------------------------------------*/
3461                         int alloca_skip = S390_MINIMAL_STACK_SIZE + cfg->param_area;
3462                         int area_offset = S390_ALIGN(alloca_skip, S390_STACK_ALIGNMENT);
3463                         s390_lr   (code, s390_r1, ins->sreg1);
3464                         if (ins->flags & MONO_INST_INIT)
3465                                 s390_lr   (code, s390_r0, ins->sreg1);
3466                         s390_ahi  (code, s390_r1, 14);
3467                         s390_srl  (code, s390_r1, 0, 3);
3468                         s390_sll  (code, s390_r1, 0, 3);
3469                         if (cfg->method->save_lmf) {
3470                                 /*----------------------------------*/
3471                                 /* we have to adjust lmf ebp value  */
3472                                 /*----------------------------------*/
3473                                 int lmfOffset = cfg->stack_usage - sizeof(MonoLMF);
3474
3475                                 s390_lr (code, s390_r13, cfg->frame_reg);
3476                                 if (s390_is_uimm16(lmfOffset))
3477                                         s390_ahi   (code, s390_r13, lmfOffset);
3478                                 else {
3479                                         s390_basr (code, s390_r14, 0);
3480                                         s390_j    (code, 4);
3481                                         s390_word (code, lmfOffset);
3482                                         s390_a    (code, s390_r13, 0, s390_r14, 4);
3483                                 }
3484                                 s390_lr (code, s390_r14, STK_BASE);
3485                                 s390_sr (code, s390_r14, s390_r1);
3486                                 s390_st (code, s390_r14, 0, s390_r13,
3487                                          G_STRUCT_OFFSET(MonoLMF, ebp));
3488                         }
3489                         s390_l    (code, s390_r13, 0, STK_BASE, 0);
3490                         s390_sr   (code, STK_BASE, s390_r1);
3491                         s390_st   (code, s390_r13, 0, STK_BASE, 0);
3492                         s390_la   (code, ins->dreg, 0, STK_BASE, area_offset);
3493                         s390_srl  (code, ins->dreg, 0, 3);
3494                         s390_sll  (code, ins->dreg, 0, 3);
3495                         if (ins->flags & MONO_INST_INIT) {
3496                                 s390_lr   (code, s390_r1, s390_r0);
3497                                 s390_lr   (code, s390_r0, ins->dreg);
3498                                 s390_lr   (code, s390_r14, s390_r12);
3499                                 s390_lhi  (code, s390_r13, 0);
3500                                 s390_mvcle(code, s390_r0, s390_r12, 0, 0);
3501                                 s390_jo   (code, -2);
3502                                 s390_lr   (code, s390_r12, s390_r14);
3503                         }
3504                 }
3505                         break;
3506                 case CEE_RET: {
3507                         s390_br  (code, s390_r14);
3508                 }
3509                         break;
3510                 case CEE_THROW: {
3511                         s390_lr (code, s390_r2, ins->sreg1);
3512                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD,
3513                                              (gpointer)"mono_arch_throw_exception");
3514                         s390_brasl (code, s390_r14, 0);
3515                 }
3516                         break;
3517                 case OP_RETHROW: {
3518                         s390_lr (code, s390_r2, ins->sreg1);
3519                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD,
3520                                              (gpointer)"mono_arch_rethrow_exception");
3521                         s390_brasl (code, s390_r14, 0);
3522                 }
3523                         break;
3524                 case OP_START_HANDLER: {
3525                         if (s390_is_uimm12 (ins->inst_left->inst_offset)) {
3526                                 s390_st   (code, s390_r14, 0,
3527                                            ins->inst_left->inst_basereg,
3528                                            ins->inst_left->inst_offset);
3529                         } else {
3530                                 s390_basr (code, s390_r13, 0);
3531                                 s390_j    (code, 4);
3532                                 s390_word (code, ins->inst_left->inst_offset);
3533                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3534                                 s390_st   (code, s390_r14, s390_r13,
3535                                            ins->inst_left->inst_basereg, 0);
3536                         }
3537                 }
3538                         break;
3539                 case OP_ENDFILTER: {
3540                         if (ins->sreg1 != s390_r2)
3541                                 s390_lr (code, s390_r2, ins->sreg1);
3542                         if (s390_is_uimm12 (ins->inst_left->inst_offset)) {
3543                                 s390_l  (code, s390_r14, 0, ins->inst_left->inst_basereg,
3544                                          ins->inst_left->inst_offset);
3545                         } else {
3546                                 s390_basr (code, s390_r13, 0);
3547                                 s390_j    (code, 4);
3548                                 s390_word (code, ins->inst_left->inst_offset);
3549                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3550                                 s390_l    (code, s390_r14, s390_r13,
3551                                            ins->inst_left->inst_basereg, 0);
3552                         }
3553                         s390_br  (code, s390_r14);
3554                 }
3555                         break;
3556                 case CEE_ENDFINALLY: {
3557                         if (s390_is_uimm12 (ins->inst_left->inst_offset)) {
3558                                 s390_l  (code, s390_r14, 0, ins->inst_left->inst_basereg,
3559                                          ins->inst_left->inst_offset);
3560                         } else {
3561                                 s390_basr (code, s390_r13, 0);
3562                                 s390_j    (code, 4);
3563                                 s390_word (code, ins->inst_left->inst_offset);
3564                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3565                                 s390_l    (code, s390_r14, s390_r13,
3566                                            ins->inst_left->inst_basereg, 0);
3567                         }
3568                         s390_br  (code, s390_r14);
3569                 }
3570                         break;
3571                 case OP_CALL_HANDLER: {
3572                         mono_add_patch_info (cfg, code-cfg->native_code,
3573                                              MONO_PATCH_INFO_BB, ins->inst_target_bb);
3574                         s390_brasl (code, s390_r14, 0);
3575                 }
3576                         break;
3577                 case OP_LABEL: {
3578                         ins->inst_c0 = code - cfg->native_code;
3579                 }
3580                         break;
3581                 case CEE_BR:
3582                         EMIT_UNCOND_BRANCH(ins);
3583                         break;
3584                 case OP_BR_REG: {
3585                         s390_br  (code, ins->sreg1);
3586                 }
3587                         break;
3588                 case OP_CEQ: {
3589                         s390_lhi (code, ins->dreg, 1);
3590                         s390_jz  (code, 4);
3591                         s390_lhi (code, ins->dreg, 0);
3592                 }
3593                         break;
3594                 case OP_CLT: {
3595                         s390_lhi (code, ins->dreg, 1);
3596                         s390_jl  (code, 4);
3597                         s390_lhi (code, ins->dreg, 0);
3598                 }
3599                         break;
3600                 case OP_CLT_UN: {
3601                         s390_lhi (code, ins->dreg, 1);
3602                         s390_jlo (code, 4);
3603                         s390_lhi (code, ins->dreg, 0);
3604                 }
3605                         break;
3606                 case OP_CGT: {
3607                         s390_lhi (code, ins->dreg, 1);
3608                         s390_jh  (code, 4);
3609                         s390_lhi (code, ins->dreg, 0);
3610                 }
3611                         break;
3612                 case OP_CGT_UN: {
3613                         s390_lhi (code, ins->dreg, 1);
3614                         s390_jho (code, 4);
3615                         s390_lhi (code, ins->dreg, 0);
3616                 }
3617                         break;
3618                 case OP_COND_EXC_EQ:
3619                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_EQ, ins->inst_p1);
3620                         break;
3621                 case OP_COND_EXC_NE_UN:
3622                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NE, ins->inst_p1);
3623                         break;
3624                 case OP_COND_EXC_LT:
3625                 case OP_COND_EXC_LT_UN:
3626                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, ins->inst_p1);
3627                         break;
3628                 case OP_COND_EXC_GT:
3629                 case OP_COND_EXC_GT_UN:
3630                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GT, ins->inst_p1);
3631                         break;
3632                 case OP_COND_EXC_GE:
3633                 case OP_COND_EXC_GE_UN:
3634                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GE, ins->inst_p1);
3635                         break;
3636                 case OP_COND_EXC_LE:
3637                 case OP_COND_EXC_LE_UN:
3638                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LE, ins->inst_p1);
3639                         break;
3640                 case OP_COND_EXC_OV:
3641                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, ins->inst_p1);
3642                         break;
3643                 case OP_COND_EXC_NO:
3644                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NO, ins->inst_p1);
3645                         break;
3646                 case OP_COND_EXC_C:
3647                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, ins->inst_p1);
3648                         break;
3649                 case OP_COND_EXC_NC:
3650                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, ins->inst_p1);
3651                         break;
3652                 case CEE_BEQ:
3653                         EMIT_COND_BRANCH (ins, S390_CC_EQ);
3654                         break;
3655                 case CEE_BNE_UN:
3656                         EMIT_COND_BRANCH (ins, S390_CC_NE);
3657                         break;
3658                 case CEE_BLT:
3659                 case CEE_BLT_UN:
3660                         EMIT_COND_BRANCH (ins, S390_CC_LT);
3661                         break;
3662                 case CEE_BGT:
3663                 case CEE_BGT_UN:
3664                         EMIT_COND_BRANCH (ins, S390_CC_GT);
3665                         break;
3666                 case CEE_BGE:
3667                 case CEE_BGE_UN:
3668                         EMIT_COND_BRANCH (ins, S390_CC_GE);
3669                         break;
3670                 case CEE_BLE:
3671                 case CEE_BLE_UN:
3672                         EMIT_COND_BRANCH (ins, S390_CC_LE);
3673                         break;
3674
3675                 /* floating point opcodes */
3676                 case OP_R8CONST: {
3677                         if (*((float *) ins->inst_p0) == 0) {
3678                                 s390_lzdr (code, ins->dreg);
3679                         } else {
3680                                 s390_basr  (code, s390_r13, 0);
3681                                 s390_j     (code, 4);
3682                                 s390_word  (code, ins->inst_p0);
3683                                 s390_l     (code, s390_r13, 0, s390_r13, 4);
3684                                 s390_ld    (code, ins->dreg, 0, s390_r13, 0);
3685                         }
3686                 }
3687                         break;
3688                 case OP_R4CONST: {
3689                         if (*((float *) ins->inst_p0) == 0) {
3690                                 s390_lzdr (code, ins->dreg);
3691                         } else {
3692                                 s390_basr (code, s390_r13, 0);
3693                                 s390_j    (code, 4);
3694                                 s390_word (code, ins->inst_p0);
3695                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3696                                 s390_ldeb (code, ins->dreg, 0, s390_r13, 0);
3697                         }
3698                 }
3699                         break;
3700                 case OP_STORER8_MEMBASE_REG: {
3701                         if (s390_is_uimm12(ins->inst_offset)) {
3702                                 s390_std  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
3703                         } else {
3704                                 s390_basr (code, s390_r13, 0);
3705                                 s390_j    (code, 4);
3706                                 s390_word (code, ins->inst_offset);
3707                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3708                                 s390_std  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
3709                         }
3710                 }
3711                         break;
3712                 case OP_LOADR8_MEMBASE: {
3713                         if (s390_is_uimm12(ins->inst_offset)) {
3714                                 s390_ld   (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
3715                         } else {
3716                                 s390_basr (code, s390_r13, 0);
3717                                 s390_j    (code, 4);
3718                                 s390_word (code, ins->inst_offset);
3719                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3720                                 s390_ld   (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
3721                         }
3722                 }
3723                         break;
3724                 case OP_STORER4_MEMBASE_REG: {
3725                         if (s390_is_uimm12(ins->inst_offset)) {
3726                                 s390_ledbr(code, s390_f15, ins->sreg1);
3727                                 s390_ste  (code, s390_f15, 0, ins->inst_destbasereg, ins->inst_offset);
3728                         } else {
3729                                 s390_basr (code, s390_r13, 0);
3730                                 s390_j    (code, 4);
3731                                 s390_word (code, ins->inst_offset);
3732                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3733                                 s390_ledbr(code, s390_f15, ins->sreg1);
3734                                 s390_ste  (code, s390_f15, s390_r13, ins->inst_destbasereg, 0);
3735                         }
3736                 }
3737                         break;
3738                 case OP_LOADR4_MEMBASE: {
3739                         if (s390_is_uimm12(ins->inst_offset)) {
3740                                 s390_ldeb (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
3741                         } else {
3742                                 s390_basr (code, s390_r13, 0);
3743                                 s390_j    (code, 4);
3744                                 s390_word (code, ins->inst_offset);
3745                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3746                                 s390_ldeb (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
3747                         }
3748                 }
3749                         break;
3750                 case CEE_CONV_R_UN: {
3751                         s390_cdfbr (code, ins->dreg, ins->sreg1);
3752                         s390_ltr   (code, ins->sreg1, ins->sreg1);
3753                         s390_jnl   (code, 12);
3754                         s390_basr  (code, s390_r13, 0);
3755                         s390_j     (code, 6);
3756                         s390_word  (code, 0x41f00000);
3757                         s390_word  (code, 0);
3758                         s390_adb   (code, ins->dreg, 0, s390_r13, 4);
3759                 }
3760                         break;
3761                 case CEE_CONV_R4: {
3762                         s390_cdfbr (code, ins->dreg, ins->sreg1);
3763                 }
3764                         break;
3765                 case CEE_CONV_R8: {
3766                         s390_cdfbr (code, ins->dreg, ins->sreg1);
3767                 }
3768                         break;
3769                 case OP_FCONV_TO_I1:
3770                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 1, TRUE);
3771                         break;
3772                 case OP_FCONV_TO_U1:
3773                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 1, FALSE);
3774                         break;
3775                 case OP_FCONV_TO_I2:
3776                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 2, TRUE);
3777                         break;
3778                 case OP_FCONV_TO_U2:
3779                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 2, FALSE);
3780                         break;
3781                 case OP_FCONV_TO_I4:
3782                 case OP_FCONV_TO_I:
3783                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 4, TRUE);
3784                         break;
3785                 case OP_FCONV_TO_U4:
3786                 case OP_FCONV_TO_U:
3787                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 4, FALSE);
3788                         break;
3789                 case OP_FCONV_TO_I8:
3790                 case OP_FCONV_TO_U8:
3791                         g_assert_not_reached ();
3792                         /* Implemented as helper calls */
3793                         break;
3794                 case OP_LCONV_TO_R_UN:
3795                         g_assert_not_reached ();
3796                         /* Implemented as helper calls */
3797                         break;
3798                 case OP_LCONV_TO_OVF_I: {
3799                         /* Valid ints: 0xffffffff:8000000 to 00000000:0x7f000000 */
3800                         short int *o[5];
3801                         s390_ltr  (code, ins->sreg1, ins->sreg1);
3802                         s390_jnl  (code, 0); CODEPTR(code, o[0]);
3803                         s390_ltr  (code, ins->sreg2, ins->sreg2);
3804                         s390_jnl  (code, 0); CODEPTR(code, o[1]);
3805                         s390_lhi  (code, s390_r13, -1);
3806                         s390_cr   (code, ins->sreg2, s390_r13);
3807                         s390_jnz  (code, 0); CODEPTR(code, o[2]);
3808                         if (ins->dreg != ins->sreg1)
3809                                 s390_lr   (code, ins->dreg, ins->sreg1);
3810                         s390_j    (code, 0); CODEPTR(code, o[3]);
3811                         PTRSLOT(code, o[0]);
3812                         s390_ltr  (code, ins->sreg2, ins->sreg2);
3813                         s390_jz   (code, 0); CODEPTR(code, o[4]);
3814                         PTRSLOT(code, o[1]);
3815                         PTRSLOT(code, o[2]);
3816                         mono_add_patch_info (cfg, code - cfg->native_code,
3817                                              MONO_PATCH_INFO_EXC, "OverflowException");
3818                         s390_brasl (code, s390_r14, 0);
3819                         PTRSLOT(code, o[3]);
3820                         PTRSLOT(code, o[4]);
3821                 }
3822                         break;
3823                 case OP_SQRT: {
3824                         s390_sqdbr (code, ins->dreg, ins->sreg1);
3825                 }
3826                         break;
3827                 case OP_FADD: {
3828                         CHECK_SRCDST_COM_F;
3829                         s390_adbr (code, ins->dreg, src2);
3830                 }
3831                         break;
3832                 case OP_FSUB: {
3833                         CHECK_SRCDST_NCOM_F;
3834                         s390_sdbr (code, ins->dreg, src2);
3835                 }
3836                         break;
3837                 case OP_FMUL: {
3838                         CHECK_SRCDST_COM_F;
3839                         s390_mdbr (code, ins->dreg, src2);
3840                 }
3841                         break;
3842                 case OP_FDIV: {
3843                         CHECK_SRCDST_NCOM_F;
3844                         s390_ddbr (code, ins->dreg, src2);
3845                 }
3846                         break;
3847                 case OP_FNEG: {
3848                         s390_lcdbr (code, ins->dreg, ins->sreg1);
3849                 }
3850                         break;
3851                 case OP_FREM: {
3852                         CHECK_SRCDST_NCOM_F;
3853                         s390_didbr (code, ins->dreg, src2, 5, s390_f15);
3854                 }
3855                         break;
3856                 case OP_FCOMPARE: {
3857                         s390_cdbr (code, ins->sreg1, ins->sreg2);
3858                 }
3859                         break;
3860                 case OP_FCEQ: {
3861                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3862                         s390_lhi   (code, ins->dreg, 1);
3863                         s390_je    (code, 4);
3864                         s390_lhi   (code, ins->dreg, 0);
3865                 }
3866                         break;
3867                 case OP_FCLT: {
3868                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3869                         s390_lhi   (code, ins->dreg, 1);
3870                         s390_jl    (code, 4);
3871                         s390_lhi   (code, ins->dreg, 0);
3872                 }
3873                         break;
3874                 case OP_FCLT_UN: {
3875                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3876                         s390_lhi   (code, ins->dreg, 1);
3877                         s390_jlo   (code, 4);
3878                         s390_lhi   (code, ins->dreg, 0);
3879                 }
3880                         break;
3881                 case OP_FCGT: {
3882                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3883                         s390_lhi   (code, ins->dreg, 1);
3884                         s390_jh    (code, 4);
3885                         s390_lhi   (code, ins->dreg, 0);
3886                 }
3887                         break;
3888                 case OP_FCGT_UN: {
3889                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3890                         s390_lhi   (code, ins->dreg, 1);
3891                         s390_jho   (code, 4);
3892                         s390_lhi   (code, ins->dreg, 0);
3893                 }
3894                         break;
3895                 case OP_FBEQ:
3896                         EMIT_COND_BRANCH (ins, S390_CC_EQ|S390_CC_OV);
3897                         break;
3898                 case OP_FBNE_UN:
3899                         EMIT_COND_BRANCH (ins, S390_CC_NE|S390_CC_OV);
3900                         break;
3901                 case OP_FBLT:
3902                         EMIT_COND_BRANCH (ins, S390_CC_LT);
3903                         break;
3904                 case OP_FBLT_UN:
3905                         EMIT_COND_BRANCH (ins, S390_CC_LT|S390_CC_OV);
3906                         break;
3907                 case OP_FBGT:
3908                         EMIT_COND_BRANCH (ins, S390_CC_GT);
3909                         break;
3910                 case OP_FBGT_UN:
3911                         EMIT_COND_BRANCH (ins, S390_CC_GT|S390_CC_OV);
3912                         break;
3913                 case OP_FBGE:
3914                         EMIT_COND_BRANCH (ins, S390_CC_GE);
3915                         break;
3916                 case OP_FBGE_UN:
3917                         EMIT_COND_BRANCH (ins, S390_CC_GE|S390_CC_OV);
3918                         break;
3919                 case OP_FBLE:
3920                         EMIT_COND_BRANCH (ins, S390_CC_LE);
3921                         break;
3922                 case OP_FBLE_UN:
3923                         EMIT_COND_BRANCH (ins, S390_CC_LE|S390_CC_OV);
3924                         break;
3925                 case CEE_CKFINITE: {
3926                         short *o;
3927                         s390_lhi  (code, s390_r13, 0x7f);
3928                         s390_tcdb (code, ins->sreg1, 0, s390_r13, 0);
3929                         s390_jz   (code, 0); CODEPTR(code, o);
3930                         mono_add_patch_info (cfg, code - cfg->native_code,
3931                                              MONO_PATCH_INFO_EXC, "ArithmeticException");
3932                         s390_brasl (code, s390_r14,0);
3933                         PTRSLOT(code, o);
3934                 }
3935                         break;
3936                 case OP_S390_MOVE: {
3937                         if (ins->backend.size > 0) {
3938                                 if (ins->backend.size <= 256) {
3939                                         s390_mvc  (code, ins->backend.size, ins->dreg,
3940                                                    ins->inst_offset, ins->sreg1, ins->inst_imm);
3941                                 } else {
3942                                         s390_lr   (code, s390_r0, ins->dreg);
3943                                         if (s390_is_imm16 (ins->inst_offset)) {
3944                                                 s390_ahi  (code, s390_r0, ins->inst_offset);
3945                                         } else {
3946                                                 s390_basr (code, s390_r13, 0);
3947                                                 s390_j    (code, 4);
3948                                                 s390_word (code, ins->inst_offset);
3949                                                 s390_a    (code, s390_r0, 0, s390_r13, 4);
3950                                         }
3951                                         s390_lr   (code, s390_r14, s390_r12);
3952                                         s390_lr   (code, s390_r12, ins->sreg1);
3953                                         if (s390_is_imm16 (ins->inst_imm)) {
3954                                                 s390_ahi  (code, s390_r12, ins->inst_imm);
3955                                         } else {
3956                                                 s390_basr (code, s390_r13, 0);
3957                                                 s390_j    (code, 4);
3958                                                 s390_word (code, ins->inst_imm);
3959                                                 s390_a    (code, s390_r12, 0, s390_r13, 4);
3960                                         }
3961                                         s390_lr   (code, s390_r1, ins->sreg1);
3962                                         s390_lr   (code, s390_r13, s390_r1);
3963                                         s390_mvcle(code, s390_r0, s390_r12, 0, 0);
3964                                         s390_jo   (code, -2);
3965                                         s390_lr   (code, s390_r12, s390_r14);
3966                                 }
3967                         }
3968                 }
3969                         break;
3970                 case OP_ATOMIC_ADD_I4: {
3971                         s390_lr  (code, s390_r1, ins->sreg2);
3972                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
3973                         s390_a   (code, s390_r1, 0, ins->inst_basereg, ins->inst_offset);
3974                         s390_cs  (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
3975                         s390_jnz (code, -7);
3976                         s390_lr  (code, ins->dreg, s390_r1);
3977                 }
3978                         break;
3979                 case OP_ATOMIC_ADD_NEW_I4: {
3980                         s390_lr  (code, s390_r1, ins->sreg2);
3981                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
3982                         s390_a   (code, s390_r1, 0, ins->inst_basereg, ins->inst_offset);
3983                         s390_cs  (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
3984                         s390_jnz (code, -7);
3985                         s390_lr  (code, ins->dreg, s390_r1);
3986                 }
3987                         break;
3988                 case OP_ATOMIC_EXCHANGE_I4: {
3989                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
3990                         s390_cs  (code, s390_r0, ins->sreg2, ins->inst_basereg, ins->inst_offset);
3991                         s390_jnz (code, -4);
3992                         s390_lr  (code, ins->dreg, s390_r0);
3993                 }
3994                         break;
3995                 case OP_S390_BKCHAIN: {
3996                         s390_lr  (code, ins->dreg, ins->sreg1);
3997                         if (s390_is_imm16 (cfg->stack_offset)) {
3998                                 s390_ahi (code, ins->dreg, cfg->stack_offset);
3999                         } else {
4000                                 s390_basr (code, s390_r13, 0);
4001                                 s390_j    (code, 6);
4002                                 s390_word (code, cfg->stack_offset);
4003                                 s390_a    (code, ins->dreg, 0, s390_r13, 4);
4004                         }
4005                 }
4006                 case OP_MEMORY_BARRIER: {
4007                 }
4008                         break;
4009                 default:
4010                         g_warning ("unknown opcode %s in %s()\n", mono_inst_name (ins->opcode), __FUNCTION__);
4011                         g_assert_not_reached ();
4012                 }
4013
4014                 if ((cfg->opt & MONO_OPT_BRANCH) && ((code - cfg->native_code - offset) > max_len)) {
4015                         g_warning ("wrong maximal instruction length of instruction %s (expected %d, got %d)",
4016                                    mono_inst_name (ins->opcode), max_len, code - cfg->native_code - offset);
4017                         g_assert_not_reached ();
4018                 }
4019
4020                 cpos += max_len;
4021
4022                 last_ins = ins;
4023                 last_offset = offset;
4024
4025                 ins = ins->next;
4026         }
4027
4028         cfg->code_len = code - cfg->native_code;
4029 }
4030
4031 /*========================= End of Function ========================*/
4032
4033 /*------------------------------------------------------------------*/
4034 /*                                                                  */
4035 /* Name         - mono_arch_register_lowlevel_calls                 */
4036 /*                                                                  */
4037 /* Function     - Register routines to help with --trace operation. */
4038 /*                                                                  */
4039 /*------------------------------------------------------------------*/
4040
4041 void
4042 mono_arch_register_lowlevel_calls (void)
4043 {
4044         mono_register_jit_icall (mono_arch_break, "mono_arch_break", NULL, TRUE);
4045         mono_register_jit_icall (mono_arch_get_lmf_addr, "mono_arch_get_lmf_addr", NULL, TRUE);
4046 }
4047
4048 /*========================= End of Function ========================*/
4049
4050 /*------------------------------------------------------------------*/
4051 /*                                                                  */
4052 /* Name         - mono_arch_patch_code                              */
4053 /*                                                                  */
4054 /* Function     - Process the patch data created during the         */
4055 /*                instruction build process. This resolves jumps,   */
4056 /*                calls, variables etc.                             */
4057 /*                                                                  */
4058 /*------------------------------------------------------------------*/
4059
4060 static void
4061 mono_arch_break(void) {
4062 }
4063
4064 /*========================= End of Function ========================*/
4065
4066 /*------------------------------------------------------------------*/
4067 /*                                                                  */
4068 /* Name         - mono_arch_patch_code                              */
4069 /*                                                                  */
4070 /* Function     - Process the patch data created during the         */
4071 /*                instruction build process. This resolves jumps,   */
4072 /*                calls, variables etc.                             */
4073 /*                                                                  */
4074 /*------------------------------------------------------------------*/
4075
4076 void
4077 mono_arch_patch_code (MonoMethod *method, MonoDomain *domain,
4078                       guint8 *code, MonoJumpInfo *ji, gboolean run_cctors)
4079 {
4080         MonoJumpInfo *patch_info;
4081
4082         for (patch_info = ji; patch_info; patch_info = patch_info->next) {
4083                 unsigned char *ip = patch_info->ip.i + code;
4084                 gconstpointer target = NULL;
4085
4086                 target = mono_resolve_patch_target (method, domain, code,
4087                                                     patch_info, run_cctors);
4088
4089                 switch (patch_info->type) {
4090                         case MONO_PATCH_INFO_IP:
4091                         case MONO_PATCH_INFO_EXC_NAME:
4092                         case MONO_PATCH_INFO_LDSTR:
4093                         case MONO_PATCH_INFO_TYPE_FROM_HANDLE:
4094                         case MONO_PATCH_INFO_LDTOKEN:
4095                         case MONO_PATCH_INFO_EXC:
4096                                 continue;
4097                         case MONO_PATCH_INFO_SWITCH:
4098                                 /*----------------------------------*/
4099                                 /* ip points at the basr r13,0/j +4 */
4100                                 /* instruction the vtable value     */
4101                                 /* follows this (i.e. ip+6)         */
4102                                 /*----------------------------------*/
4103                                 *((gconstpointer *)(ip+6)) = target;
4104                                 target = NULL;
4105                                 continue;
4106                         case MONO_PATCH_INFO_METHODCONST:
4107                         case MONO_PATCH_INFO_CLASS:
4108                         case MONO_PATCH_INFO_IMAGE:
4109                         case MONO_PATCH_INFO_FIELD:
4110                         case MONO_PATCH_INFO_IID:
4111                                 target = S390_RELATIVE(target, ip);
4112                                 continue;
4113                         case MONO_PATCH_INFO_R4:
4114                         case MONO_PATCH_INFO_R8:
4115                         case MONO_PATCH_INFO_METHOD_REL:
4116                                 g_assert_not_reached ();
4117                                 continue;
4118                         default:
4119                                 target = S390_RELATIVE(target, ip);
4120                                 ip += 2;
4121                 }
4122                 s390_patch (ip, (guint32) target);
4123         }
4124 }
4125
4126 /*========================= End of Function ========================*/
4127
4128 /*------------------------------------------------------------------*/
4129 /*                                                                  */
4130 /* Name         - emit_load_volatile_registers                      */
4131 /*                                                                  */
4132 /* Function     - Create the instruction sequence for loading the   */
4133 /*                parameter registers for use with the 'tail' op.   */
4134 /*                                                                  */
4135 /*                The register loading operations performed here    */
4136 /*                are the mirror of the store operations performed  */
4137 /*                in mono_arch_emit_prolog and need to be kept in   */
4138 /*                synchronization with it.                          */
4139 /*                                                                  */
4140 /*------------------------------------------------------------------*/
4141
4142 guint8 *
4143 emit_load_volatile_registers(guint8 * code, MonoCompile *cfg)
4144 {
4145         MonoMethod *method = cfg->method;
4146         MonoMethodSignature *sig;
4147         MonoInst *inst;
4148         int pos, i;
4149         CallInfo *cinfo;
4150         size_data sz;
4151
4152         sig = mono_method_signature (method);
4153         pos = 0;
4154
4155         cinfo = calculate_sizes (sig, &sz, sig->pinvoke);
4156
4157         if (cinfo->struct_ret) {
4158                 ArgInfo *ainfo = &cinfo->ret;
4159                 inst         = cfg->ret;
4160                 s390_l (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4161         }
4162
4163         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
4164                 ArgInfo *ainfo = cinfo->args + i;
4165                 inst = cfg->varinfo [pos];
4166
4167                 if (inst->opcode == OP_REGVAR) {
4168                         if (ainfo->regtype == RegTypeGeneral)
4169                                 s390_lr (code, ainfo->reg, inst->dreg);
4170                         else if (ainfo->regtype == RegTypeFP) {
4171                                 if (inst->dreg != ainfo->reg) {
4172                                         if (ainfo->size == 4) {
4173                                                 s390_ldebr (code, ainfo->reg, inst->dreg);
4174                                         } else {
4175                                                 s390_ldr   (code, ainfo->reg, inst->dreg);
4176                                         }
4177                                 }
4178                         }
4179                         else if (ainfo->regtype == RegTypeBase) {
4180                         } else
4181                                 g_assert_not_reached ();
4182                 } else {
4183                         if (ainfo->regtype == RegTypeGeneral) {
4184                                 if (!((ainfo->reg >= 2) && (ainfo->reg <= 6)))
4185                                         g_assert_not_reached();
4186                                 switch (ainfo->size) {
4187                                 case 1:
4188                                         s390_ic (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4189                                         break;
4190                                 case 2:
4191                                         s390_lh (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4192                                         break;
4193                                 case 8:
4194                                         s390_lm (code, ainfo->reg, ainfo->reg + 1,
4195                                                   inst->inst_basereg, inst->inst_offset);
4196                                         break;
4197                                 default:
4198                                         s390_l  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4199                                 }
4200                         } else if (ainfo->regtype == RegTypeBase) {
4201                         } else if (ainfo->regtype == RegTypeFP) {
4202                                 if (ainfo->size == 8)
4203                                         s390_ld (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4204                                 else if (ainfo->size == 4)
4205                                         s390_le (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4206                                 else
4207                                         g_assert_not_reached ();
4208                         } else if (ainfo->regtype == RegTypeStructByVal) {
4209                                 if (ainfo->reg != STK_BASE) {
4210                                         switch (ainfo->size) {
4211                                         case 1:
4212                                                 s390_ic (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4213                                                 break;
4214                                         case 2:
4215                                                 s390_lh (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4216                                                 break;
4217                                         case 4:
4218                                                 s390_l  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4219                                                 break;
4220                                         case 8:
4221                                                 s390_lm (code, ainfo->reg, ainfo->reg+1, inst->inst_basereg, inst->inst_offset);
4222                                                 break;
4223                                         }
4224                                 }
4225                         } else if (ainfo->regtype == RegTypeStructByAddr) {
4226                                 if (ainfo->reg != STK_BASE) {
4227                                         s390_l  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4228                                 }
4229                         } else
4230                                 g_assert_not_reached ();
4231                 }
4232                 pos++;
4233         }
4234
4235         g_free (cinfo);
4236
4237         return code;
4238 }
4239
4240 /*========================= End of Function ========================*/
4241
4242 /*------------------------------------------------------------------*/
4243 /*                                                                  */
4244 /* Name         - mono_arch_emit_prolog                             */
4245 /*                                                                  */
4246 /* Function     - Create the instruction sequence for a function    */
4247 /*                prolog.                                           */
4248 /*                                                                  */
4249 /*------------------------------------------------------------------*/
4250
4251 guint8 *
4252 mono_arch_emit_prolog (MonoCompile *cfg)
4253 {
4254         MonoMethod *method = cfg->method;
4255         MonoBasicBlock *bb;
4256         MonoMethodSignature *sig;
4257         MonoInst *inst;
4258         int alloc_size, pos, max_offset, i;
4259         guint8 *code;
4260         CallInfo *cinfo;
4261         size_data sz;
4262         int tracing = 0;
4263         int lmfOffset;                                                          \
4264
4265         if (mono_jit_trace_calls != NULL && mono_trace_eval (method))
4266                 tracing = 1;
4267
4268         cfg->code_size   = 512;
4269         cfg->native_code = code = g_malloc (cfg->code_size);
4270
4271         s390_stm  (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
4272
4273         if (cfg->flags & MONO_CFG_HAS_ALLOCA) {
4274                 cfg->used_int_regs |= 1 << 11;
4275         }
4276
4277         alloc_size = cfg->stack_offset;
4278
4279         cfg->stack_usage = alloc_size;
4280         s390_lr   (code, s390_r11, STK_BASE);
4281         if (s390_is_uimm16 (alloc_size)) {
4282                 s390_ahi  (code, STK_BASE, -alloc_size);
4283         } else {
4284                 int stackSize = alloc_size;
4285                 while (stackSize > 32767) {
4286                         s390_ahi  (code, STK_BASE, -32767);
4287                         stackSize -= 32767;
4288                 }
4289                 s390_ahi  (code, STK_BASE, -stackSize);
4290         }
4291         s390_st   (code, s390_r11, 0, STK_BASE, 0);
4292
4293         if (cfg->frame_reg != STK_BASE)
4294                 s390_lr (code, s390_r11, STK_BASE);
4295
4296         /* compute max_offset in order to use short forward jumps
4297          * we always do it on s390 because the immediate displacement
4298          * for jumps is too small
4299          */
4300         max_offset = 0;
4301         for (bb = cfg->bb_entry; bb; bb = bb->next_bb) {
4302                 MonoInst *ins = bb->code;
4303                 bb->max_offset = max_offset;
4304
4305                 if (cfg->prof_options & MONO_PROFILE_COVERAGE)
4306                         max_offset += 6;
4307
4308                 while (ins) {
4309                         max_offset += ((guint8 *)ins_get_spec (ins->opcode))[MONO_INST_LEN];
4310                         ins = ins->next;
4311                 }
4312         }
4313
4314         /* load arguments allocated to register from the stack */
4315         sig = mono_method_signature (method);
4316         pos = 0;
4317
4318         cinfo = calculate_sizes (sig, &sz, sig->pinvoke);
4319
4320         if (cinfo->struct_ret) {
4321                 ArgInfo *ainfo = &cinfo->ret;
4322                 inst         = cfg->ret;
4323                 inst->backend.size = ainfo->vtsize;
4324                 s390_st (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4325         }
4326
4327         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
4328                 ArgInfo *ainfo = cinfo->args + i;
4329                 inst = cfg->varinfo [pos];
4330
4331                 if (inst->opcode == OP_REGVAR) {
4332                         if (ainfo->regtype == RegTypeGeneral)
4333                                 s390_lr (code, inst->dreg, ainfo->reg);
4334                         else if (ainfo->regtype == RegTypeFP) {
4335                                 if (inst->dreg != ainfo->reg) {
4336                                         if (ainfo->size == 4) {
4337                                                 s390_ledbr (code, inst->dreg, ainfo->reg);
4338                                         } else {
4339                                                 s390_ldr   (code, inst->dreg, ainfo->reg);
4340                                         }
4341                                 }
4342                         }
4343                         else if (ainfo->regtype == RegTypeBase) {
4344                                 s390_lr  (code, s390_r13, STK_BASE);
4345                                 s390_ahi (code, s390_r13, alloc_size);
4346                                 s390_l   (code, inst->dreg, 0, s390_r13, ainfo->offset);
4347                         } else
4348                                 g_assert_not_reached ();
4349
4350                         if (cfg->verbose_level > 2)
4351                                 g_print ("Argument %d assigned to register %s\n",
4352                                          pos, mono_arch_regname (inst->dreg));
4353                 } else {
4354                         if (ainfo->regtype == RegTypeGeneral) {
4355                                 if (!((ainfo->reg >= 2) && (ainfo->reg <= 6)))
4356                                         g_assert_not_reached();
4357                                 switch (ainfo->size) {
4358                                 case 1:
4359                                         s390_stc (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4360                                         break;
4361                                 case 2:
4362                                         s390_sth (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4363                                         break;
4364                                 case 8:
4365                                         s390_stm (code, ainfo->reg, ainfo->reg + 1,
4366                                                   inst->inst_basereg, inst->inst_offset);
4367                                         break;
4368                                 default:
4369                                         s390_st  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4370                                 }
4371                         } else if (ainfo->regtype == RegTypeBase) {
4372                         } else if (ainfo->regtype == RegTypeFP) {
4373                                 if (ainfo->size == 8)
4374                                         s390_std (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4375                                 else if (ainfo->size == 4)
4376                                         s390_ste (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4377                                 else
4378                                         g_assert_not_reached ();
4379                         } else if (ainfo->regtype == RegTypeStructByVal) {
4380                                 int doffset = inst->inst_offset;
4381                                 int reg;
4382                                 if (ainfo->reg != STK_BASE)
4383                                         reg = ainfo->reg;
4384                                 else {
4385                                         reg = s390_r0;
4386                                         s390_lr  (code, s390_r13, STK_BASE);
4387                                         s390_ahi (code, s390_r13, alloc_size);
4388                                 }
4389                                 switch (ainfo->size) {
4390                                         case 1:
4391                                                 if (ainfo->reg == STK_BASE)
4392                                                         s390_ic  (code, reg, 0, s390_r13, ainfo->offset+3);
4393                                                 s390_stc (code, reg, 0, inst->inst_basereg, doffset);
4394                                                 break;
4395                                         case 2:
4396                                                 if (ainfo->reg == STK_BASE)
4397                                                         s390_lh  (code, reg, 0, s390_r13, ainfo->offset+2);
4398                                                 s390_sth (code, reg, 0, inst->inst_basereg, doffset);
4399                                                 break;
4400                                         case 4:
4401                                                 if (ainfo->reg == STK_BASE)
4402                                                         s390_l   (code, reg, 0, s390_r13, ainfo->offset);
4403                                                 s390_st  (code, reg, 0, inst->inst_basereg, doffset);
4404                                                 break;
4405                                         case 8:
4406                                                 if (ainfo->reg == STK_BASE)
4407                                                         s390_lm  (code, s390_r0, s390_r1, s390_r13, ainfo->offset);
4408                                                 s390_stm (code, reg, reg+1, inst->inst_basereg, doffset);
4409                                                 break;
4410                                 }
4411                         } else if (ainfo->regtype == RegTypeStructByAddr) {
4412                                 if (ainfo->reg != STK_BASE)
4413                                         s390_st  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4414                         } else
4415                                 g_assert_not_reached ();
4416                 }
4417                 pos++;
4418         }
4419
4420         if (method->save_lmf) {
4421                 /*---------------------------------------------------------------*/
4422                 /* we build the MonoLMF structure on the stack - see mini-s390.h */
4423                 /*---------------------------------------------------------------*/
4424                 lmfOffset = alloc_size - sizeof(MonoLMF);
4425
4426                 s390_lr    (code, s390_r13, cfg->frame_reg);
4427                 if (s390_is_uimm16(lmfOffset))
4428                         s390_ahi   (code, s390_r13, lmfOffset);
4429                 else {
4430                         s390_basr (code, s390_r14, 0);
4431                         s390_j    (code, 4);
4432                         s390_word (code, lmfOffset);
4433                         s390_a    (code, s390_r13, 0, s390_r14, 4);
4434                 }
4435
4436                 /*---------------------------------------------------------------*/
4437                 /* Preserve the parameter registers while we fix up the lmf      */
4438                 /*---------------------------------------------------------------*/
4439                 s390_stm   (code, s390_r2, s390_r6, s390_r13,
4440                             G_STRUCT_OFFSET(MonoLMF, pregs[0]));
4441
4442                 /*---------------------------------------------------------------*/
4443                 /* On return from this call r2 have the address of the &lmf      */
4444                 /*---------------------------------------------------------------*/
4445                 mono_add_patch_info (cfg, code - cfg->native_code,
4446                                      MONO_PATCH_INFO_INTERNAL_METHOD,
4447                                      (gpointer)"mono_get_lmf_addr");
4448                 s390_brasl (code, s390_r14, 0);
4449
4450                 /*---------------------------------------------------------------*/
4451                 /* Set lmf.lmf_addr = jit_tls->lmf                               */
4452                 /*---------------------------------------------------------------*/
4453                 s390_st    (code, s390_r2, 0, s390_r13,
4454                             G_STRUCT_OFFSET(MonoLMF, lmf_addr));
4455
4456                 /*---------------------------------------------------------------*/
4457                 /* Get current lmf                                               */
4458                 /*---------------------------------------------------------------*/
4459                 s390_l     (code, s390_r0, 0, s390_r2, 0);
4460
4461                 /*---------------------------------------------------------------*/
4462                 /* Set our lmf as the current lmf                                */
4463                 /*---------------------------------------------------------------*/
4464                 s390_st    (code, s390_r13, 0, s390_r2, 0);
4465
4466                 /*---------------------------------------------------------------*/
4467                 /* Have our lmf.previous_lmf point to the last lmf               */
4468                 /*---------------------------------------------------------------*/
4469                 s390_st    (code, s390_r0, 0, s390_r13,
4470                             G_STRUCT_OFFSET(MonoLMF, previous_lmf));
4471
4472                 /*---------------------------------------------------------------*/
4473                 /* save method info                                              */
4474                 /*---------------------------------------------------------------*/
4475                 s390_basr  (code, s390_r1, 0);
4476                 s390_j     (code, 4);
4477                 s390_word  (code, method);
4478                 s390_l     (code, s390_r1, 0, s390_r1, 4);
4479                 s390_st    (code, s390_r1, 0, s390_r13,
4480                             G_STRUCT_OFFSET(MonoLMF, method));
4481
4482                 /*---------------------------------------------------------------*/
4483                 /* save the current IP                                           */
4484                 /*---------------------------------------------------------------*/
4485                 s390_st    (code, STK_BASE, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, ebp));
4486                 s390_basr  (code, s390_r1, 0);
4487                 s390_la    (code, s390_r1, 0, s390_r1, 0);
4488                 s390_st    (code, s390_r1, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, eip));
4489
4490                 /*---------------------------------------------------------------*/
4491                 /* Save general and floating point registers                     */
4492                 /*---------------------------------------------------------------*/
4493                 s390_stm   (code, s390_r2, s390_r12, s390_r13,
4494                             G_STRUCT_OFFSET(MonoLMF, gregs[2]));
4495                 for (i = 0; i < 16; i++) {
4496                         s390_std  (code, i, 0, s390_r13,
4497                                    G_STRUCT_OFFSET(MonoLMF, fregs[i]));
4498                 }
4499
4500                 /*---------------------------------------------------------------*/
4501                 /* Restore the parameter registers now that we've set up the lmf */
4502                 /*---------------------------------------------------------------*/
4503                 s390_lm    (code, s390_r2, s390_r6, s390_r13,
4504                             G_STRUCT_OFFSET(MonoLMF, pregs[0]));
4505         }
4506
4507         if (tracing)
4508                 code = mono_arch_instrument_prolog(cfg, enter_method, code, TRUE);
4509
4510         cfg->code_len = code - cfg->native_code;
4511         g_free (cinfo);
4512
4513         return code;
4514 }
4515
4516 /*========================= End of Function ========================*/
4517
4518 /*------------------------------------------------------------------*/
4519 /*                                                                  */
4520 /* Name         - mono_arch_emit_epilog                             */
4521 /*                                                                  */
4522 /* Function     - Emit the instructions for a function epilog.      */
4523 /*                                                                  */
4524 /*------------------------------------------------------------------*/
4525
4526 void
4527 mono_arch_emit_epilog (MonoCompile *cfg)
4528 {
4529         MonoMethod *method = cfg->method;
4530         int tracing = 0;
4531         guint8 *code;
4532         int max_epilog_size = 96;
4533
4534         if (cfg->method->save_lmf)
4535                 max_epilog_size += 128;
4536
4537         if (mono_jit_trace_calls != NULL)
4538                 max_epilog_size += 128;
4539
4540         if (cfg->prof_options & MONO_PROFILE_ENTER_LEAVE)
4541                 max_epilog_size += 128;
4542
4543         while ((cfg->code_len + max_epilog_size) > (cfg->code_size - 16)) {
4544                 cfg->code_size  *= 2;
4545                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
4546                 mono_jit_stats.code_reallocs++;
4547         }
4548
4549         code = cfg->native_code + cfg->code_len;
4550
4551         if (mono_jit_trace_calls != NULL && mono_trace_eval (method)) {
4552                 code = mono_arch_instrument_epilog (cfg, leave_method, code, TRUE);
4553                 tracing = 1;
4554         }
4555
4556         if (method->save_lmf)
4557                 restoreLMF(code, cfg->frame_reg, cfg->stack_usage);
4558
4559         if (cfg->flags & MONO_CFG_HAS_ALLOCA)
4560                 s390_l (code, STK_BASE, 0, STK_BASE, 0);
4561         else
4562                 code = backUpStackPtr(cfg, code, STK_BASE);
4563
4564         s390_lm  (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
4565         s390_br  (code, s390_r14);
4566
4567         cfg->code_len = code - cfg->native_code;
4568
4569         g_assert (cfg->code_len < cfg->code_size);
4570
4571 }
4572
4573 /*========================= End of Function ========================*/
4574
4575 /*------------------------------------------------------------------*/
4576 /*                                                                  */
4577 /* Name         - mono_arch_emit_exceptions                         */
4578 /*                                                                  */
4579 /* Function     - Emit the blocks to handle exception conditions.   */
4580 /*                                                                  */
4581 /*------------------------------------------------------------------*/
4582
4583 void
4584 mono_arch_emit_exceptions (MonoCompile *cfg)
4585 {
4586         MonoJumpInfo    *patch_info;
4587         guint8          *code;
4588         int             nThrows = 0,
4589                         exc_count = 0,
4590                         iExc;
4591         guint32         code_size;
4592         MonoClass       *exc_classes [MAX_EXC];
4593         guint8          *exc_throw_start [MAX_EXC],
4594                         *exc_throw_end [MAX_EXC];
4595
4596         for (patch_info = cfg->patch_info;
4597              patch_info;
4598              patch_info = patch_info->next) {
4599                 if (patch_info->type == MONO_PATCH_INFO_EXC)
4600                         exc_count++;
4601         }
4602
4603         code_size = exc_count * 26;
4604
4605         while ((cfg->code_len + code_size) > (cfg->code_size - 16)) {
4606                 cfg->code_size  *= 2;
4607                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
4608                 mono_jit_stats.code_reallocs++;
4609         }
4610
4611         code = cfg->native_code + cfg->code_len;
4612
4613         /*---------------------------------------------------------------------*/
4614         /* Add code to raise exceptions                                        */
4615         /*---------------------------------------------------------------------*/
4616         for (patch_info = cfg->patch_info; patch_info; patch_info = patch_info->next) {
4617                 switch (patch_info->type) {
4618                 case MONO_PATCH_INFO_EXC: {
4619                         guint8 *ip = patch_info->ip.i + cfg->native_code;
4620                         MonoClass *exc_class;
4621                         guint32 throw_ip;
4622
4623                         /*-----------------------------------------------------*/
4624                         /* Patch the branch in epilog to come here             */
4625                         /*-----------------------------------------------------*/
4626                         s390_patch (ip + 2, (guint32) (S390_RELATIVE(code,ip)));
4627
4628                         exc_class = mono_class_from_name (mono_defaults.corlib,
4629                                                           "System",
4630                                                           patch_info->data.name);
4631                         g_assert (exc_class);
4632                         throw_ip = patch_info->ip.i;
4633
4634                         for (iExc = 0; iExc < nThrows; ++iExc)
4635                                 if (exc_classes [iExc] == exc_class)
4636                                         break;
4637
4638                         if (iExc < nThrows) {
4639                                 s390_jcl (code, S390_CC_UN, (guint32) exc_throw_start [iExc]);
4640                                 patch_info->type = MONO_PATCH_INFO_NONE;
4641                         } else {
4642
4643                                 if (nThrows < MAX_EXC) {
4644                                         exc_classes [nThrows]     = exc_class;
4645                                         exc_throw_start [nThrows] = code;
4646                                 }
4647
4648                                 /*---------------------------------------------*/
4649                                 /* Patch the parameter passed to the handler   */
4650                                 /*---------------------------------------------*/
4651                                 s390_basr (code, s390_r13, 0);
4652                                 s390_j    (code, 4);
4653                                 s390_word (code, patch_info->data.target);
4654                                 /*---------------------------------------------*/
4655                                 /* Load return address & parameter register    */
4656                                 /*---------------------------------------------*/
4657                                 s390_larl (code, s390_r14, S390_RELATIVE((patch_info->ip.i +
4658                                                            cfg->native_code + 8), code));
4659                                 s390_l    (code, s390_r2, 0, s390_r13, 4);
4660                                 /*---------------------------------------------*/
4661                                 /* Reuse the current patch to set the jump     */
4662                                 /*---------------------------------------------*/
4663                                 patch_info->type      = MONO_PATCH_INFO_INTERNAL_METHOD;
4664                                 patch_info->data.name = "mono_arch_throw_exception_by_name";
4665                                 patch_info->ip.i      = code - cfg->native_code;
4666                                 s390_jcl  (code, S390_CC_UN, 0);
4667                         }
4668                         break;
4669                 }
4670                 default:
4671                         /* do nothing */
4672                         break;
4673                 }
4674         }
4675
4676         cfg->code_len = code - cfg->native_code;
4677
4678         g_assert (cfg->code_len < cfg->code_size);
4679
4680 }
4681
4682 /*========================= End of Function ========================*/
4683
4684 /*------------------------------------------------------------------*/
4685 /*                                                                  */
4686 /* Name         - mono_arch_setup_jit_tls_data                      */
4687 /*                                                                  */
4688 /* Function     - Setup the JIT's Thread Level Specific Data.       */
4689 /*                                                                  */
4690 /*------------------------------------------------------------------*/
4691
4692 void
4693 mono_arch_setup_jit_tls_data (MonoJitTlsData *tls)
4694 {
4695
4696         if (!tls_offset_inited) {
4697                 tls_offset_inited = TRUE;
4698
4699 #if HAVE_KW_THREAD
4700 # if 0
4701         __asm__ ("\tear\t%r1,0\n"
4702                  "\tlr\t%0,%3\n"
4703                  "\tsr\t%0,%r1\n"
4704                  "\tlr\t%1,%4\n"
4705                  "\tsr\t%1,%r1\n"
4706                  "\tlr\t%2,%5\n"
4707                  "\tsr\t%2,%r1\n"
4708                  : "=r" (appdomain_tls_offset),
4709                    "=r" (thread_tls_offset),
4710                    "=r" (lmf_tls_offset)
4711                  : "r" (&tls_appdomain),
4712                    "r" (&tls_current_object),
4713                    "r" (&mono_lmf_addr)
4714                  : "1", "cc");
4715 # endif
4716 #endif
4717         }
4718
4719         if (!lmf_addr_key_inited) {
4720                 lmf_addr_key_inited = TRUE;
4721                 pthread_key_create (&lmf_addr_key, NULL);
4722         }
4723         pthread_setspecific (lmf_addr_key, &tls->lmf);
4724
4725 }
4726
4727 /*========================= End of Function ========================*/
4728
4729 /*------------------------------------------------------------------*/
4730 /*                                                                  */
4731 /* Name         - mono_arch_free_jit_tls_data                       */
4732 /*                                                                  */
4733 /* Function     - Free tls data.                                    */
4734 /*                                                                  */
4735 /*------------------------------------------------------------------*/
4736
4737 void
4738 mono_arch_free_jit_tls_data (MonoJitTlsData *tls)
4739 {
4740
4741 }
4742
4743 /*========================= End of Function ========================*/
4744
4745 /*------------------------------------------------------------------*/
4746 /*                                                                  */
4747 /* Name         - mono_arch_emit_this_vret_args                     */
4748 /*                                                                  */
4749 /* Function     -                                                   */
4750 /*                                                                  */
4751 /*------------------------------------------------------------------*/
4752
4753 void
4754 mono_arch_emit_this_vret_args (MonoCompile *cfg, MonoCallInst *inst, int this_reg, int this_type, int vt_reg)
4755 {
4756         int this_dreg = s390_r2;
4757
4758         if (vt_reg != -1)
4759                 this_dreg = s390_r3;
4760
4761         /* add the this argument */
4762         if (this_reg != -1) {
4763                 MonoInst *this;
4764                 MONO_INST_NEW (cfg, this, OP_SETREG);
4765                 this->type  = this_type;
4766                 this->sreg1 = this_reg;
4767                 this->dreg  = mono_regstate_next_int (cfg->rs);
4768                 mono_bblock_add_inst (cfg->cbb, this);
4769                 mono_call_inst_add_outarg_reg (cfg, inst, this->dreg, this_dreg, FALSE);
4770         }
4771
4772         if (vt_reg != -1) {
4773                 MonoInst *vtarg;
4774                 MONO_INST_NEW (cfg, vtarg, OP_SETREG);
4775                 vtarg->type  = STACK_MP;
4776                 vtarg->sreg1 = vt_reg;
4777                 vtarg->dreg  = mono_regstate_next_int (cfg->rs);
4778                 mono_bblock_add_inst (cfg->cbb, vtarg);
4779                 mono_call_inst_add_outarg_reg (cfg, inst, vtarg->dreg, s390_r2, FALSE);
4780         }
4781 }
4782
4783 /*========================= End of Function ========================*/
4784
4785 /*------------------------------------------------------------------*/
4786 /*                                                                  */
4787 /* Name         - mono_arch_get_inst_for_method                   */
4788 /*                                                                  */
4789 /* Function     - Check for opcodes we can handle directly in       */
4790 /*                hardware.                                         */
4791 /*                                                                  */
4792 /*------------------------------------------------------------------*/
4793
4794 MonoInst*
4795 mono_arch_get_inst_for_method (MonoCompile *cfg, MonoMethod *cmethod,
4796                                MonoMethodSignature *fsig, MonoInst **args)
4797 {
4798         MonoInst *ins = NULL;
4799
4800         if (cmethod->klass == mono_defaults.math_class) {
4801                 if (strcmp (cmethod->name, "Sqrt") == 0) {
4802                         MONO_INST_NEW (cfg, ins, OP_SQRT);
4803                         ins->inst_i0 = args [0];
4804                 }
4805         } else if (cmethod->klass == mono_defaults.thread_class &&
4806                            strcmp (cmethod->name, "MemoryBarrier") == 0) {
4807                 MONO_INST_NEW (cfg, ins, OP_MEMORY_BARRIER);
4808         } else if(cmethod->klass->image == mono_defaults.corlib &&
4809                            (strcmp (cmethod->klass->name_space, "System.Threading") == 0) &&
4810                            (strcmp (cmethod->klass->name, "Interlocked") == 0)) {
4811
4812                 if (strcmp (cmethod->name, "Increment") == 0 &&
4813                     fsig->params [0]->type == MONO_TYPE_I4) {
4814                         MonoInst *ins_iconst;
4815
4816                         MONO_INST_NEW (cfg, ins, OP_ATOMIC_ADD_NEW_I4);
4817                         MONO_INST_NEW (cfg, ins_iconst, OP_ICONST);
4818                         ins_iconst->inst_c0 = 1;
4819
4820                         ins->inst_i0 = args [0];
4821                         ins->inst_i1 = ins_iconst;
4822                 } else if (strcmp (cmethod->name, "Decrement") == 0 &&
4823                            fsig->params [0]->type == MONO_TYPE_I4) {
4824                         MonoInst *ins_iconst;
4825
4826                         MONO_INST_NEW (cfg, ins, OP_ATOMIC_ADD_NEW_I4);
4827                         MONO_INST_NEW (cfg, ins_iconst, OP_ICONST);
4828                         ins_iconst->inst_c0 = -1;
4829
4830                         ins->inst_i0 = args [0];
4831                         ins->inst_i1 = ins_iconst;
4832                 } else if (strcmp (cmethod->name, "Exchange") == 0 &&
4833                            fsig->params [0]->type == MONO_TYPE_I4) {
4834                         MONO_INST_NEW (cfg, ins, OP_ATOMIC_EXCHANGE_I4);
4835
4836                         ins->inst_i0 = args [0];
4837                         ins->inst_i1 = args [1];
4838                 } else if (strcmp (cmethod->name, "Add") == 0 &&
4839                            fsig->params [0]->type == MONO_TYPE_I4) {
4840                         MONO_INST_NEW (cfg, ins, OP_ATOMIC_ADD_I4);
4841
4842                         ins->inst_i0 = args [0];
4843                         ins->inst_i1 = args [1];
4844                 }
4845         }
4846         return ins;
4847 }
4848
4849 /*========================= End of Function ========================*/
4850
4851 /*------------------------------------------------------------------*/
4852 /*                                                                  */
4853 /* Name         - mono_arch_print_tree                              */
4854 /*                                                                  */
4855 /* Function     - Print platform-specific opcode details.           */
4856 /*                                                                  */
4857 /* Returns      - 1 - opcode details have been printed              */
4858 /*                0 - opcode details have not been printed          */
4859 /*                                                                  */
4860 /*------------------------------------------------------------------*/
4861
4862 gboolean
4863 mono_arch_print_tree (MonoInst *tree, int arity)
4864 {
4865         gboolean done;
4866
4867         switch (tree->opcode) {
4868                 case OP_S390_LOADARG:
4869                 case OP_S390_ARGREG:
4870                 case OP_S390_ARGPTR:
4871                         printf ("[0x%lx(%s)]", tree->inst_offset,
4872                                 mono_arch_regname (tree->inst_basereg));
4873                         done = 1;
4874                         break;
4875                 case OP_S390_STKARG:
4876                         printf ("[0x%lx(previous_frame)]",
4877                                 tree->inst_offset);
4878                         done = 1;
4879                         break;
4880                 case OP_S390_MOVE:
4881                         printf ("[0x%lx(%d,%s),0x%lx(%s)]",
4882                                 tree->inst_offset, tree->backend.size,
4883                                 mono_arch_regname(tree->dreg), tree->inst_imm,
4884                                 mono_arch_regname(tree->sreg1));
4885                         done = 1;
4886                         break;
4887                 case OP_S390_SETF4RET:
4888                         printf ("[f%ld,f%ld]",
4889                                 mono_arch_regname (tree->dreg),
4890                                 mono_arch_regname (tree->sreg1));
4891                         done = 1;
4892                         break;
4893                 case OP_TLS_GET:
4894                         printf ("[0x%lx(0x%lx,%s)]", tree->inst_offset,
4895                                 tree->inst_imm,
4896                                 mono_arch_regname (tree->sreg1));
4897                         done = 1;
4898                         break;
4899                 case OP_S390_BKCHAIN:
4900                         printf ("[previous_frame(%s)]",
4901                                 mono_arch_regname (tree->sreg1));
4902                         done = 1;
4903                         break;
4904                 default:
4905                         done = 0;
4906         }
4907         return (done);
4908 }
4909
4910 /*========================= End of Function ========================*/
4911
4912 /*------------------------------------------------------------------*/
4913 /*                                                                  */
4914 /* Name         - mono_arch_regalloc_cost                           */
4915 /*                                                                  */
4916 /* Function     - Determine the cost, in the number of memory       */
4917 /*                references, of the action of allocating the var-  */
4918 /*                iable VMV into a register during global register  */
4919 /*                allocation.                                       */
4920 /*                                                                  */
4921 /* Returns      - Cost                                              */
4922 /*                                                                  */
4923 /*------------------------------------------------------------------*/
4924
4925 guint32
4926 mono_arch_regalloc_cost (MonoCompile *cfg, MonoMethodVar *vmv)
4927 {
4928         /* FIXME: */
4929         return 2;
4930 }
4931
4932 /*========================= End of Function ========================*/
4933
4934 /*------------------------------------------------------------------*/
4935 /*                                                                  */
4936 /* Name         - mono_arch_get_domain_intrinsic                    */
4937 /*                                                                  */
4938 /* Function     -                                                   */
4939 /*                                                                  */
4940 /* Returns      -                                                   */
4941 /*                                                                  */
4942 /*------------------------------------------------------------------*/
4943
4944 MonoInst *
4945 mono_arch_get_domain_intrinsic (MonoCompile* cfg)
4946 {
4947         MonoInst *ins;
4948
4949         if (appdomain_tls_offset == -1)
4950                 return NULL;
4951
4952         MONO_INST_NEW (cfg, ins, OP_TLS_GET);
4953         ins->inst_offset = appdomain_tls_offset;
4954         return (ins);
4955 }
4956
4957 /*========================= End of Function ========================*/
4958
4959 /*------------------------------------------------------------------*/
4960 /*                                                                  */
4961 /* Name         - mono_arch_get_thread_intrinsic                    */
4962 /*                                                                  */
4963 /* Function     -                                                   */
4964 /*                                                                  */
4965 /* Returns      -                                                   */
4966 /*                                                                  */
4967 /*------------------------------------------------------------------*/
4968
4969 MonoInst *
4970 mono_arch_get_thread_intrinsic (MonoCompile* cfg)
4971 {
4972         MonoInst *ins;
4973
4974         if (thread_tls_offset == -1)
4975                 return NULL;
4976
4977         MONO_INST_NEW (cfg, ins, OP_TLS_GET);
4978         ins->inst_offset = thread_tls_offset;
4979         return (ins);
4980 }
4981
4982 /*========================= End of Function ========================*/
4983
4984 /*------------------------------------------------------------------*/
4985 /*                                                                  */
4986 /* Name         - mono_arch_flush_register_windows                  */
4987 /*                                                                  */
4988 /* Function     -                                                   */
4989 /*                                                                  */
4990 /* Returns      -                                                   */
4991 /*                                                                  */
4992 /*------------------------------------------------------------------*/
4993
4994 void
4995 mono_arch_flush_register_windows (void)
4996 {
4997 }
4998
4999 /*========================= End of Function ========================*/
5000
5001 /*------------------------------------------------------------------*/
5002 /*                                                                  */
5003 /* Name         - mono_arch_get_lmf_addr                            */
5004 /*                                                                  */
5005 /* Function     -                                                   */
5006 /*                                                                  */
5007 /* Returns      -                                                   */
5008 /*                                                                  */
5009 /*------------------------------------------------------------------*/
5010
5011 gpointer
5012 mono_arch_get_lmf_addr (void)
5013 {
5014         return pthread_getspecific (lmf_addr_key);
5015 }
5016
5017
5018 /*========================= End of Function ========================*/
5019
5020 /*------------------------------------------------------------------*/
5021 /*                                                                  */
5022 /* Name         - mono_arch_get_patch_offset                        */
5023 /*                                                                  */
5024 /* Function     - Dummy entry point until s390x supports aot.       */
5025 /*                                                                  */
5026 /* Returns      - Offset for patch.                                 */
5027 /*                                                                  */
5028 /*------------------------------------------------------------------*/
5029
5030 guint32
5031 mono_arch_get_patch_offset (guint8 *code)
5032 {
5033         return 0;
5034 }
5035
5036 /*========================= End of Function ========================*/