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 const char*const * ins_spec = s390_cpu_desc;
 271
 272 static gboolean tls_offset_inited = FALSE;
 273
 274 static int appdomain_tls_offset = -1,
 275            lmf_tls_offset = -1,
 276            thread_tls_offset = -1;
 277
 278 pthread_key_t lmf_addr_key;
 279
 280 gboolean lmf_addr_key_inited = FALSE;
 281
 282 #if 0
 283
 284 extern __thread MonoDomain *tls_appdomain;
 285 extern __thread MonoThread *tls_current_object;
 286 extern __thread gpointer   mono_lmf_addr;
 287
 288 #endif
 289
 290 /*====================== End of Global Variables ===================*/
 291
 292 /*------------------------------------------------------------------*/
 293 /*                                                                  */
 294 /* Name         - mono_arch_regname                                 */
 295 /*                                                                  */
 296 /* Function     - Returns the name of the register specified by     */
 297 /*                the input parameter.                              */
 298 /*                                                                  */
 299 /*------------------------------------------------------------------*/
 300
 301 const char*
 302 mono_arch_regname (int reg) {
 303         static const char * rnames[] = {
 304                 "s390_r0", "s390_sp", "s390_r2", "s390_r3", "s390_r4",
 305                 "s390_r5", "s390_r6", "s390_r7", "s390_r8", "s390_r9",
 306                 "s390_r10", "s390_r11", "s390_r12", "s390_r13", "s390_r14",
 307                 "s390_r15"
 308         };
 309
 310         if (reg >= 0 && reg < 16)
 311                 return rnames [reg];
 312         else
 313                 return "unknown";
 314 }
 315
 316 /*========================= End of Function ========================*/
 317
 318 /*------------------------------------------------------------------*/
 319 /*                                                                  */
 320 /* Name         - mono_arch_fregname                                */
 321 /*                                                                  */
 322 /* Function     - Returns the name of the register specified by     */
 323 /*                the input parameter.                              */
 324 /*                                                                  */
 325 /*------------------------------------------------------------------*/
 326
 327 const char*
 328 mono_arch_fregname (int reg) {
 329         static const char * rnames[] = {
 330                 "s390_f0", "s390_f1", "s390_f2", "s390_f3", "s390_f4",
 331                 "s390_f5", "s390_f6", "s390_f7", "s390_f8", "s390_f9",
 332                 "s390_f10", "s390_f11", "s390_f12", "s390_f13", "s390_f14",
 333                 "s390_f15"
 334         };
 335
 336         if (reg >= 0 && reg < 16)
 337                 return rnames [reg];
 338         else
 339                 return "unknown";
 340 }
 341
 342 /*========================= End of Function ========================*/
 343
 344 /*------------------------------------------------------------------*/
 345 /*                                                                  */
 346 /* Name         - arch_get_argument_info                            */
 347 /*                                                                  */
 348 /* Function     - Gathers information on parameters such as size,   */
 349 /*                alignment, and padding. arg_info should be large  */
 350 /*                enough to hold param_count + 1 entries.           */
 351 /*                                                                  */
 352 /* Parameters   - @csig - Method signature                          */
 353 /*                @param_count - No. of parameters to consider      */
 354 /*                @arg_info - An array to store the result info     */
 355 /*                                                                  */
 356 /* Returns      - Size of the activation frame                      */
 357 /*                                                                  */
 358 /*------------------------------------------------------------------*/
 359
 360 int
 361 mono_arch_get_argument_info (MonoMethodSignature *csig,
 362                              int param_count,
 363                              MonoJitArgumentInfo *arg_info)
 364 {
 365         int k, frame_size = 0;
 366         int size, align, pad;
 367         int offset = 8;
 368
 369         if (MONO_TYPE_ISSTRUCT (csig->ret)) {
 370                 frame_size += sizeof (gpointer);
 371                 offset += 4;
 372         }
 373
 374         arg_info [0].offset = offset;
 375
 376         if (csig->hasthis) {
 377                 frame_size += sizeof (gpointer);
 378                 offset += 4;
 379         }
 380
 381         arg_info [0].size = frame_size;
 382
 383         for (k = 0; k < param_count; k++) {
 384
 385                 if (csig->pinvoke)
 386                         size = mono_type_native_stack_size (csig->params [k], &align);
 387                 else
 388                         size = mono_type_stack_size (csig->params [k], &align);
 389
 390                 frame_size += pad = (align - (frame_size & (align - 1))) & (align - 1);
 391                 arg_info [k].pad = pad;
 392                 frame_size += size;
 393                 arg_info [k + 1].pad = 0;
 394                 arg_info [k + 1].size = size;
 395                 offset += pad;
 396                 arg_info [k + 1].offset = offset;
 397                 offset += size;
 398         }
 399
 400         align = MONO_ARCH_FRAME_ALIGNMENT;
 401         frame_size += pad = (align - (frame_size & (align - 1))) & (align - 1);
 402         arg_info [k].pad = pad;
 403
 404         return frame_size;
 405 }
 406
 407 /*========================= End of Function ========================*/
 408
 409 /*------------------------------------------------------------------*/
 410 /*                                                                  */
 411 /* Name         - retFitsInReg.                                     */
 412 /*                                                                  */
 413 /* Function     - Determines if a value can be returned in one or   */
 414 /*                two registers.                                    */
 415 /*                                                                  */
 416 /*------------------------------------------------------------------*/
 417
 418 static inline gboolean
 419 retFitsInReg(guint32 size)
 420 {
 421         switch (size) {
 422                 case 0:
 423                 case 1:
 424                 case 2:
 425                 case 4:
 426                 case 8:
 427                         return (TRUE);
 428                 break;
 429                 default:
 430                         return (FALSE);
 431         }
 432 }
 433
 434 /*========================= End of Function ========================*/
 435
 436 /*------------------------------------------------------------------*/
 437 /*                                                                  */
 438 /* Name         - backStackPtr.                                     */
 439 /*                                                                  */
 440 /* Function     - Restore Stack Pointer to previous frame.          */
 441 /*                                                                  */
 442 /*------------------------------------------------------------------*/
 443
 444 static inline guint8 *
 445 backUpStackPtr(MonoCompile *cfg, guint8 *code, gint framePtr)
 446 {
 447         int stackSize = cfg->stack_usage;
 448
 449         if (s390_is_uimm16 (cfg->stack_usage)) {
 450                 s390_ahi  (code, framePtr, cfg->stack_usage);
 451         } else {
 452                 while (stackSize > 32767) {
 453                         s390_ahi  (code, framePtr, 32767);
 454                         stackSize -= 32767;
 455                 }
 456                 s390_ahi  (code, framePtr, stackSize);
 457         }
 458         return (code);
 459 }
 460
 461 /*========================= End of Function ========================*/
 462
 463 /*------------------------------------------------------------------*/
 464 /*                                                                  */
 465 /* Name         - indent                                            */
 466 /*                                                                  */
 467 /* Function     - Perform nice indenting to current level           */
 468 /*                                                                  */
 469 /*------------------------------------------------------------------*/
 470
 471 static void
 472 indent (int diff) {
 473         int v;
 474         if (diff < 0)
 475                 indent_level += diff;
 476         v = indent_level;
 477         printf("[%3d] ",v);
 478         while (v-- > 0) {
 479                 printf (". ");
 480         }
 481         if (diff > 0)
 482                 indent_level += diff;
 483 }
 484
 485 /*========================= End of Function ========================*/
 486
 487 /*------------------------------------------------------------------*/
 488 /*                                                                  */
 489 /* Name         - decodeParm                                        */
 490 /*                                                                  */
 491 /* Function     - Decode a parameter for the trace.                 */
 492 /*                                                                  */
 493 /*------------------------------------------------------------------*/
 494
 495 static void
 496 decodeParm(MonoType *type, void *curParm, int size)
 497 {
 498         guint32 simpleType;
 499
 500         if (type->byref) {
 501                 printf("[BYREF:%p], ", *((char **) curParm));
 502         } else {
 503                 simpleType = mono_type_get_underlying_type(type)->type;
 504 enum_parmtype:
 505                 switch (simpleType) {
 506                         case MONO_TYPE_I :
 507                                 printf ("[INTPTR:%p], ", *((int **) curParm));
 508                                 break;
 509                         case MONO_TYPE_U :
 510                                 printf ("[UINTPTR:%p], ", *((int **) curParm));
 511                                 break;
 512                         case MONO_TYPE_BOOLEAN :
 513                                 printf ("[BOOL:%d], ", *((int *) curParm));
 514                                 break;
 515                         case MONO_TYPE_CHAR :
 516                                 printf ("[CHAR:%c], ", *((int *) curParm));
 517                                 break;
 518                         case MONO_TYPE_I1 :
 519                                 printf ("[INT1:%d], ", *((int *) curParm));
 520                                 break;
 521                         case MONO_TYPE_I2 :
 522                                 printf ("[INT2:%d], ", *((int *) curParm));
 523                                 break;
 524                         case MONO_TYPE_I4 :
 525                                 printf ("[INT4:%d], ", *((int *) curParm));
 526                                 break;
 527                         case MONO_TYPE_U1 :
 528                                 printf ("[UINT1:%u], ", *((unsigned int *) curParm));
 529                                 break;
 530                         case MONO_TYPE_U2 :
 531                                 printf ("[UINT2:%u], ", *((guint16 *) curParm));
 532                                 break;
 533                         case MONO_TYPE_U4 :
 534                                 printf ("[UINT4:%u], ", *((guint32 *) curParm));
 535                                 break;
 536                         case MONO_TYPE_U8 :
 537                                 printf ("[UINT8:%llu], ", *((guint64 *) curParm));
 538                                 break;
 539                         case MONO_TYPE_STRING : {
 540                                 MonoString *s = *((MonoString **) curParm);
 541                                 if (s) {
 542                                         g_assert (((MonoObject *) s)->vtable->klass == mono_defaults.string_class);
 543                                         printf("[STRING:%p:%s], ", s, mono_string_to_utf8(s));
 544                                 } else {
 545                                         printf("[STRING:null], ");
 546                                 }
 547                                 break;
 548                         }
 549                         case MONO_TYPE_CLASS :
 550                         case MONO_TYPE_OBJECT : {
 551                                 MonoObject *obj = *((MonoObject **) curParm);
 552                                 MonoClass *class;
 553                                 if ((obj) && (obj->vtable)) {
 554                                         printf("[CLASS/OBJ:");
 555                                         class = obj->vtable->klass;
 556                                         printf("%p [%p] ",obj,curParm);
 557 //                                      if (class == mono_defaults.string_class) {
 558 //                                              printf("[STRING:%p:%s]",
 559 //                                                     *obj, mono_string_to_utf8 (obj));
 560 //                                      } else if (class == mono_defaults.int32_class) {
 561 //                                              printf("[INT32:%p:%d]",
 562 //                                                      obj, *(gint32 *)((char *)obj + sizeof (MonoObject)));
 563 //                                      } else
 564 //                                              printf("[%s.%s:%p]",
 565 //                                                     class->name_space, class->name, obj);
 566                                         printf("], ");
 567                                 } else {
 568                                         printf("[OBJECT:null], ");
 569                                 }
 570                                 break;
 571                         }
 572                         case MONO_TYPE_PTR :
 573                                 printf("[PTR:%p], ", *((gpointer **) (curParm)));
 574                                 break;
 575                         case MONO_TYPE_FNPTR :
 576                                 printf("[FNPTR:%p], ", *((gpointer **) (curParm)));
 577                                 break;
 578                         case MONO_TYPE_ARRAY :
 579                                 printf("[ARRAY:%p], ", *((gpointer **) (curParm)));
 580                                 break;
 581                         case MONO_TYPE_SZARRAY :
 582                                 printf("[SZARRAY:%p], ", *((gpointer **) (curParm)));
 583                                 break;
 584                         case MONO_TYPE_I8 :
 585                                 printf("[INT8:%lld], ", *((gint64 *) (curParm)));
 586                                 break;
 587                         case MONO_TYPE_R4 :
 588                                 printf("[FLOAT4:%g], ", *((double *) (curParm)));
 589                                 break;
 590                         case MONO_TYPE_R8 :
 591                                 printf("[FLOAT8:%g], ", *((double *) (curParm)));
 592                                 break;
 593                         case MONO_TYPE_VALUETYPE : {
 594                                 int i;
 595                                 MonoMarshalType *info;
 596
 597                                 if (type->data.klass->enumtype) {
 598                                         simpleType = type->data.klass->enum_basetype->type;
 599                                         printf("{VALUETYPE} - ");
 600                                         goto enum_parmtype;
 601                                 }
 602
 603                                 info = mono_marshal_load_type_info (type->data.klass);
 604
 605                                 if ((info->native_size == sizeof(float)) &&
 606                                     (info->num_fields  == 1) &&
 607                                     (info->fields[0].field->type->type == MONO_TYPE_R4)) {
 608                                                 printf("[FLOAT4:%f], ", *((float *) (curParm)));
 609                                         break;
 610                                 }
 611
 612                                 if ((info->native_size == sizeof(double)) &&
 613                                     (info->num_fields  == 1) &&
 614                                     (info->fields[0].field->type->type == MONO_TYPE_R8)) {
 615                                         printf("[FLOAT8:%g], ", *((double *) (curParm)));
 616                                         break;
 617                                 }
 618
 619                                 printf("[VALUETYPE:");
 620                                 for (i = 0; i < size; i++)
 621                                         printf("%02x,", *((guint8 *)curParm+i));
 622                                 printf("]");
 623                                 break;
 624                         }
 625                         case MONO_TYPE_TYPEDBYREF: {
 626                                 int i;
 627                                 printf("[TYPEDBYREF:");
 628                                 for (i = 0; i < size; i++)
 629                                         printf("%02x,", *((guint8 *)curParm+i));
 630                                 printf("]");
 631                                 break;
 632                         }
 633                         default :
 634                                 printf("[?? - %d], ",simpleType);
 635                 }
 636         }
 637 }
 638
 639 /*========================= End of Function ========================*/
 640
 641 static int lc = 0;
 642 /*------------------------------------------------------------------*/
 643 /*                                                                  */
 644 /* Name         - enter_method                                      */
 645 /*                                                                  */
 646 /* Function     - Perform tracing of the entry to the current       */
 647 /*                method.                                           */
 648 /*                                                                  */
 649 /*------------------------------------------------------------------*/
 650
 651 static void
 652 enter_method (MonoMethod *method, RegParm *rParm, char *sp)
 653 {
 654         int i, oParm = 0, iParm = 0;
 655         MonoClass *class;
 656         MonoObject *obj;
 657         MonoMethodSignature *sig;
 658         char *fname;
 659         guint32 ip;
 660         CallInfo *cinfo;
 661         ArgInfo *ainfo;
 662         size_data sz;
 663         void *curParm;
 664
 665
 666 lc++;
 667 if (lc > 5000000) {
 668 fseek(stdout, 0L, SEEK_SET);
 669 lc = 0;
 670 }
 671         fname = mono_method_full_name (method, TRUE);
 672         indent (1);
 673         printf ("ENTER: %s(", fname);
 674         g_free (fname);
 675
 676         ip  = (*(guint32 *) (sp+S390_RET_ADDR_OFFSET)) & 0x7fffffff;
 677         printf (") ip: %p sp: %p - ", (gpointer) ip, sp);
 678
 679         if (rParm == NULL)
 680                 return;
 681
 682         sig = mono_method_signature (method);
 683
 684         cinfo = calculate_sizes (sig, &sz, sig->pinvoke);
 685
 686         if (cinfo->struct_ret) {
 687                 printf ("[STRUCTRET:%p], ", (gpointer) rParm->gr[0]);
 688                 iParm = 1;
 689         }
 690
 691         if (sig->hasthis) {
 692                 gpointer *this = (gpointer *) rParm->gr[iParm];
 693                 obj = (MonoObject *) this;
 694                 if (method->klass->valuetype) {
 695                         if (obj) {
 696                                 printf("this:[value:%p:%08x], ",
 697                                        this, *((guint32 *)(this+sizeof(MonoObject))));
 698                         } else
 699                                 printf ("this:[NULL], ");
 700                 } else {
 701                         if (obj) {
 702 //                              class = obj->vtable->klass;
 703 //                              if (class == mono_defaults.string_class) {
 704 //                                      printf ("this:[STRING:%p:%s], ",
 705 //                                              obj, mono_string_to_utf8 ((MonoString *)obj));
 706 //                              } else {
 707 //                                      printf ("this:%p[%s.%s], ",
 708 //                                              obj, class->name_space, class->name);
 709 //                              }
 710 printf("this:%p, ",obj);
 711                         } else
 712                                 printf ("this:NULL, ");
 713                 }
 714                 oParm++;
 715         }
 716
 717         for (i = 0; i < sig->param_count; ++i) {
 718                 ainfo = &cinfo->args[i + oParm];
 719                 switch (ainfo->regtype) {
 720                         case RegTypeGeneral :
 721                                 decodeParm(sig->params[i], &(rParm->gr[ainfo->reg-2]), ainfo->size);
 722                                 break;
 723                         case RegTypeFP :
 724                                 decodeParm(sig->params[i], &(rParm->fp[ainfo->reg]), ainfo->size);
 725                                 break;
 726                         case RegTypeBase :
 727                                 decodeParm(sig->params[i], sp+ainfo->offset, ainfo->size);
 728                                 break;
 729                         case RegTypeStructByVal :
 730                                 if (ainfo->reg != STK_BASE)
 731                                         curParm = &(rParm->gr[ainfo->reg-2]);
 732                                 else
 733                                         curParm = sp+ainfo->offset;
 734
 735                                 if (retFitsInReg (ainfo->vtsize))
 736                                         decodeParm(sig->params[i],
 737                                                    curParm,
 738                                                    ainfo->size);
 739                                 else
 740                                         decodeParm(sig->params[i],
 741                                                    *((char **) curParm),
 742                                                    ainfo->vtsize);
 743                                 break;
 744                         case RegTypeStructByAddr :
 745                                 if (ainfo->reg != STK_BASE)
 746                                         curParm = &(rParm->gr[ainfo->reg-2]);
 747                                 else
 748                                         curParm = sp+ainfo->offset;
 749
 750                                 decodeParm(sig->params[i],
 751                                            *((char **) curParm),
 752                                            ainfo->vtsize);
 753                                 break;
 754
 755                         default :
 756                                 printf("???, ");
 757                 }
 758         }
 759         printf("\n");
 760         g_free(cinfo);
 761 }
 762
 763 /*========================= End of Function ========================*/
 764
 765 /*------------------------------------------------------------------*/
 766 /*                                                                  */
 767 /* Name         - leave_method                                      */
 768 /*                                                                  */
 769 /* Function     -                                                   */
 770 /*                                                                  */
 771 /*------------------------------------------------------------------*/
 772
 773 static void
 774 leave_method (MonoMethod *method, ...)
 775 {
 776         MonoType *type;
 777         char *fname;
 778         guint32 ip;
 779         va_list ap;
 780
 781         va_start(ap, method);
 782
 783         fname = mono_method_full_name (method, TRUE);
 784         indent (-1);
 785         printf ("LEAVE: %s", fname);
 786         g_free (fname);
 787
 788         type = mono_method_signature (method)->ret;
 789
 790 handle_enum:
 791         switch (type->type) {
 792         case MONO_TYPE_VOID:
 793                 break;
 794         case MONO_TYPE_BOOLEAN: {
 795                 int val = va_arg (ap, int);
 796                 if (val)
 797                         printf ("[TRUE:%d]", val);
 798                 else
 799                         printf ("[FALSE]");
 800
 801                 break;
 802         }
 803         case MONO_TYPE_CHAR: {
 804                 int val = va_arg (ap, int);
 805                 printf ("[CHAR:%d]", val);
 806                 break;
 807         }
 808         case MONO_TYPE_I1: {
 809                 int val = va_arg (ap, int);
 810                 printf ("[INT1:%d]", val);
 811                 break;
 812         }
 813         case MONO_TYPE_U1: {
 814                 int val = va_arg (ap, int);
 815                 printf ("[UINT1:%d]", val);
 816                 break;
 817         }
 818         case MONO_TYPE_I2: {
 819                 int val = va_arg (ap, int);
 820                 printf ("[INT2:%d]", val);
 821                 break;
 822         }
 823         case MONO_TYPE_U2: {
 824                 int val = va_arg (ap, int);
 825                 printf ("[UINT2:%d]", val);
 826                 break;
 827         }
 828         case MONO_TYPE_I4: {
 829                 int val = va_arg (ap, int);
 830                 printf ("[INT4:%d]", val);
 831                 break;
 832         }
 833         case MONO_TYPE_U4: {
 834                 int val = va_arg (ap, int);
 835                 printf ("[UINT4:%d]", val);
 836                 break;
 837         }
 838         case MONO_TYPE_I: {
 839                 int val = va_arg (ap, int);
 840                 printf ("[INT:%d]", val);
 841                 printf("]");
 842                 break;
 843         }
 844         case MONO_TYPE_U: {
 845                 int val = va_arg (ap, int);
 846                 printf ("[UINT:%d]", val);
 847                 printf("]");
 848                 break;
 849         }
 850         case MONO_TYPE_STRING: {
 851                 MonoString *s = va_arg (ap, MonoString *);
 852 ;
 853                 if (s) {
 854                         g_assert (((MonoObject *)s)->vtable->klass == mono_defaults.string_class);
 855                         printf ("[STRING:%p:%s]", s, mono_string_to_utf8 (s));
 856                 } else
 857                         printf ("[STRING:null], ");
 858                 break;
 859         }
 860         case MONO_TYPE_CLASS:
 861         case MONO_TYPE_OBJECT: {
 862                 MonoObject *o = va_arg (ap, MonoObject *);
 863
 864 //              if ((o) && (o->vtable)) {
 865 //                      if (o->vtable->klass == mono_defaults.boolean_class) {
 866 //                              printf ("[BOOLEAN:%p:%d]", o, *((guint8 *)o + sizeof (MonoObject)));
 867 //                      } else if  (o->vtable->klass == mono_defaults.int32_class) {
 868 //                              printf ("[INT32:%p:%d]", o, *((gint32 *)((char *)o + sizeof (MonoObject))));
 869 //                      } else if  (o->vtable->klass == mono_defaults.int64_class) {
 870 //                              printf ("[INT64:%p:%lld]", o, *((gint64 *)((char *)o + sizeof (MonoObject))));
 871 //                      } else
 872 //                              printf ("[%s.%s:%p]", o->vtable->klass->name_space, o->vtable->klass->name, o);
 873 //              } else
 874                         printf ("[OBJECT:%p]", o);
 875
 876                 break;
 877         }
 878         case MONO_TYPE_PTR:
 879         case MONO_TYPE_FNPTR:
 880         case MONO_TYPE_ARRAY:
 881         case MONO_TYPE_SZARRAY: {
 882                 gpointer p = va_arg (ap, gpointer);
 883                 printf ("[result=%p]", p);
 884                 break;
 885         }
 886         case MONO_TYPE_I8: {
 887                 gint64 l =  va_arg (ap, gint64);
 888                 printf ("[LONG:%lld]", l);
 889                 break;
 890         }
 891         case MONO_TYPE_U8: {
 892                 guint64 l =  va_arg (ap, guint64);
 893                 printf ("[ULONG:%llu]", l);
 894                 break;
 895         }
 896         case MONO_TYPE_R4: {
 897                 double f;
 898                 f = va_arg (ap, double);
 899                 printf ("[FLOAT4:%g]\n", f);
 900                 break;
 901         }
 902         case MONO_TYPE_R8: {
 903                 double f = va_arg (ap, double);
 904                 printf ("[FLOAT8:%g]\n", f);
 905                 break;
 906         }
 907         case MONO_TYPE_VALUETYPE: {
 908                 MonoMarshalType *info;
 909                 if (type->data.klass->enumtype) {
 910                         type = type->data.klass->enum_basetype;
 911                         goto handle_enum;
 912                 } else {
 913                         guint8 *p = va_arg (ap, gpointer);
 914                         int j, size, align;
 915
 916                         info = mono_marshal_load_type_info (type->data.klass);
 917
 918                         if ((info->native_size == sizeof(float)) &&
 919                             (info->num_fields  == 1) &&
 920                             (info->fields[0].field->type->type == MONO_TYPE_R4)) {
 921                                 double f = va_arg (ap, double);
 922                                 printf("[FLOAT4:%g]\n", (double) f);
 923                                 break;
 924                         }
 925
 926                         if ((info->native_size == sizeof(double)) &&
 927                             (info->num_fields  == 1) &&
 928                             (info->fields[0].field->type->type == MONO_TYPE_R8)) {
 929                                 double f = va_arg (ap, double);
 930                                 printf("[FLOAT8:%g]\n", f);
 931                                 break;
 932                         }
 933
 934                         size = mono_type_size (type, &align);
 935                         switch (size) {
 936                         case 1:
 937                         case 2:
 938                         case 4:
 939                         case 8:
 940                                 printf ("[");
 941                                 for (j = 0; p && j < size; j++)
 942                                         printf ("%02x,", p [j]);
 943                                 printf ("]\n");
 944                                 break;
 945                         default:
 946                                 printf ("[VALUERET]\n");
 947                         }
 948                 }
 949                 break;
 950         }
 951         case MONO_TYPE_TYPEDBYREF: {
 952                 guint8 *p = va_arg (ap, gpointer);
 953                 int j, size, align;
 954                 size = mono_type_size (type, &align);
 955                 switch (size) {
 956                 case 1:
 957                 case 2:
 958                 case 4:
 959                 case 8:
 960                         printf ("[");
 961                         for (j = 0; p && j < size; j++)
 962                                 printf ("%02x,", p [j]);
 963                         printf ("]\n");
 964                         break;
 965                 default:
 966                         printf ("[TYPEDBYREF]\n");
 967                 }
 968         }
 969                 break;
 970         default:
 971                 printf ("(unknown return type %x)",
 972                         mono_method_signature (method)->ret->type);
 973         }
 974
 975         ip = ((gint32) __builtin_return_address (0)) & 0x7fffffff;
 976         printf (" ip: %p\n", (gpointer) ip);
 977 }
 978
 979 /*========================= End of Function ========================*/
 980
 981 /*------------------------------------------------------------------*/
 982 /*                                                                  */
 983 /* Name         - mono_arch_cpu_init                                */
 984 /*                                                                  */
 985 /* Function     - Perform CPU specific initialization to execute    */
 986 /*                managed code.                                     */
 987 /*                                                                  */
 988 /*------------------------------------------------------------------*/
 989
 990 void
 991 mono_arch_cpu_init (void)
 992 {
 993         guint mode = 1;
 994
 995         /*--------------------------------------*/
 996         /* Set default rounding mode for FP     */
 997         /*--------------------------------------*/
 998         __asm__ ("SRNM\t%0\n\t"
 999                 : : "m" (mode));
1000 }
1001
1002 /*========================= End of Function ========================*/
1003
1004 /*------------------------------------------------------------------*/
1005 /*                                                                  */
1006 /* Name         - mono_arch_cpu_optimizazions                       */
1007 /*                                                                  */
1008 /* Function     - Returns the optimizations supported on this CPU   */
1009 /*                                                                  */
1010 /*------------------------------------------------------------------*/
1011
1012 guint32
1013 mono_arch_cpu_optimizazions (guint32 *exclude_mask)
1014 {
1015         guint32 opts = 0;
1016
1017         /*----------------------------------------------------------*/
1018         /* no s390-specific optimizations yet                       */
1019         /*----------------------------------------------------------*/
1020         *exclude_mask = MONO_OPT_INLINE|MONO_OPT_LINEARS;
1021 //      *exclude_mask = MONO_OPT_INLINE;
1022         return opts;
1023 }
1024
1025 /*========================= End of Function ========================*/
1026
1027 /*------------------------------------------------------------------*/
1028 /*                                                                  */
1029 /* Name         -                                                   */
1030 /*                                                                  */
1031 /* Function     -                                                   */
1032 /*                                                                  */
1033 /*------------------------------------------------------------------*/
1034
1035 static gboolean
1036 is_regsize_var (MonoType *t) {
1037         if (t->byref)
1038                 return TRUE;
1039         switch (mono_type_get_underlying_type (t)->type) {
1040         case MONO_TYPE_I4:
1041         case MONO_TYPE_U4:
1042         case MONO_TYPE_I:
1043         case MONO_TYPE_U:
1044         case MONO_TYPE_PTR:
1045         case MONO_TYPE_FNPTR:
1046                 return TRUE;
1047         case MONO_TYPE_OBJECT:
1048         case MONO_TYPE_STRING:
1049         case MONO_TYPE_CLASS:
1050         case MONO_TYPE_SZARRAY:
1051         case MONO_TYPE_ARRAY:
1052                 return FALSE;
1053         case MONO_TYPE_VALUETYPE:
1054                 if (t->data.klass->enumtype)
1055                         return is_regsize_var (t->data.klass->enum_basetype);
1056                 return FALSE;
1057         }
1058         return FALSE;
1059 }
1060
1061 /*========================= End of Function ========================*/
1062
1063 /*------------------------------------------------------------------*/
1064 /*                                                                  */
1065 /* Name         - mono_arch_get_allocatable_int_vars                */
1066 /*                                                                  */
1067 /* Function     -                                                   */
1068 /*                                                                  */
1069 /*------------------------------------------------------------------*/
1070
1071 GList *
1072 mono_arch_get_allocatable_int_vars (MonoCompile *cfg)
1073 {
1074         GList *vars = NULL;
1075         int i;
1076
1077         for (i = 0; i < cfg->num_varinfo; i++) {
1078                 MonoInst *ins = cfg->varinfo [i];
1079                 MonoMethodVar *vmv = MONO_VARINFO (cfg, i);
1080
1081                 /* unused vars */
1082                 if (vmv->range.first_use.abs_pos >= vmv->range.last_use.abs_pos)
1083                         continue;
1084
1085                 if (ins->flags & (MONO_INST_VOLATILE|MONO_INST_INDIRECT) ||
1086                     (ins->opcode != OP_LOCAL && ins->opcode != OP_ARG))
1087                         continue;
1088
1089                 /* we can only allocate 32 bit values */
1090                 if (is_regsize_var (ins->inst_vtype)) {
1091                         g_assert (MONO_VARINFO (cfg, i)->reg == -1);
1092                         g_assert (i == vmv->idx);
1093                         vars = mono_varlist_insert_sorted (cfg, vars, vmv, FALSE);
1094                 }
1095         }
1096
1097         return vars;
1098 }
1099
1100 /*========================= End of Function ========================*/
1101
1102 /*------------------------------------------------------------------*/
1103 /*                                                                  */
1104 /* Name         - mono_arch_global_int_regs                         */
1105 /*                                                                  */
1106 /* Function     - Return a list of usable integer registers.        */
1107 /*                                                                  */
1108 /*------------------------------------------------------------------*/
1109
1110 GList *
1111 mono_arch_get_global_int_regs (MonoCompile *cfg)
1112 {
1113         GList *regs = NULL;
1114         MonoMethodHeader *header;
1115         int i, top = 13;
1116
1117         header = mono_method_get_header (cfg->method);
1118         if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
1119                 cfg->frame_reg = s390_r11;
1120
1121         for (i = 8; i < top; ++i) {
1122                 if (cfg->frame_reg != i)
1123                         regs = g_list_prepend (regs, GUINT_TO_POINTER (i));
1124         }
1125
1126         return regs;
1127 }
1128
1129 /*========================= End of Function ========================*/
1130
1131 /*------------------------------------------------------------------*/
1132 /*                                                                  */
1133 /* Name         -  mono_arch_flush_icache                           */
1134 /*                                                                  */
1135 /* Function     -  Flush the CPU icache.                            */
1136 /*                                                                  */
1137 /*------------------------------------------------------------------*/
1138
1139 void
1140 mono_arch_flush_icache (guint8 *code, gint size)
1141 {
1142 }
1143
1144 /*========================= End of Function ========================*/
1145
1146 /*------------------------------------------------------------------*/
1147 /*                                                                  */
1148 /* Name         - add_general                                       */
1149 /*                                                                  */
1150 /* Function     - Determine code and stack size incremements for a  */
1151 /*                parameter.                                        */
1152 /*                                                                  */
1153 /*------------------------------------------------------------------*/
1154
1155 static void inline
1156 add_general (guint *gr, size_data *sz, ArgInfo *ainfo, gboolean simple)
1157 {
1158         if (simple) {
1159                 if (*gr > S390_LAST_ARG_REG) {
1160                         sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1161                         ainfo->offset   = sz->stack_size;
1162                         ainfo->reg      = STK_BASE;
1163                         ainfo->regtype  = RegTypeBase;
1164                         sz->stack_size += sizeof(int);
1165                         sz->local_size += sizeof(int);
1166                         sz->offStruct  += sizeof(int);
1167                         sz->code_size  += 12;
1168                 } else {
1169                         ainfo->reg      = *gr;
1170                         sz->code_size  += 8;
1171                 }
1172         } else {
1173                 if (*gr > S390_LAST_ARG_REG - 1) {
1174                         sz->stack_size  = S390_ALIGN(sz->stack_size, S390_STACK_ALIGNMENT);
1175                         ainfo->offset   = sz->stack_size;
1176                         ainfo->reg      = STK_BASE;
1177                         ainfo->regtype  = RegTypeBase;
1178                         sz->stack_size += sizeof(long long);
1179                         sz->local_size += sizeof(long long);
1180                         sz->offStruct  += sizeof(long long);
1181                         sz->code_size  += 10;
1182                 } else {
1183                         ainfo->reg      = *gr;
1184                         sz->code_size  += 8;
1185                 }
1186                 (*gr) ++;
1187         }
1188         (*gr) ++;
1189 }
1190
1191 /*========================= End of Function ========================*/
1192
1193 /*------------------------------------------------------------------*/
1194 /*                                                                  */
1195 /* Name         - add_stackParm                                     */
1196 /*                                                                  */
1197 /* Function     - Determine code and stack size incremements for a  */
1198 /*                parameter.                                        */
1199 /*                                                                  */
1200 /*------------------------------------------------------------------*/
1201
1202 static void inline
1203 add_stackParm (guint *gr, size_data *sz, ArgInfo *ainfo, gint size)
1204 {
1205         if (*gr > S390_LAST_ARG_REG) {
1206                 sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1207                 ainfo->reg      = STK_BASE;
1208                 sz->parm_size  += sizeof(gpointer);
1209                 sz->offStruct  += sizeof(gpointer);
1210         } else {
1211                 ainfo->reg      = *gr;
1212         }
1213         (*gr) ++;
1214         ainfo->offset   = sz->stack_size;
1215         ainfo->offparm  = sz->offset;
1216         sz->offset      = S390_ALIGN(sz->offset+size, sizeof(long));
1217         ainfo->size     = size;
1218         ainfo->regtype  = RegTypeStructByAddr;
1219         ainfo->vtsize   = size;
1220         sz->parm_size  += size;
1221 }
1222
1223 /*========================= End of Function ========================*/
1224
1225 /*------------------------------------------------------------------*/
1226 /*                                                                  */
1227 /* Name         - add_float                                         */
1228 /*                                                                  */
1229 /* Function     - Determine code and stack size incremements for a  */
1230 /*                float parameter.                                  */
1231 /*                                                                  */
1232 /*------------------------------------------------------------------*/
1233
1234 static void inline
1235 add_float (guint *fr,  size_data *sz, ArgInfo *ainfo)
1236 {
1237         if ((*fr) <= S390_LAST_FPARG_REG) {
1238                 ainfo->regtype = RegTypeFP;
1239                 ainfo->reg     = *fr;
1240                 sz->code_size += 4;
1241                 (*fr) += 2;
1242         }
1243         else {
1244                 ainfo->offset   = sz->stack_size;
1245                 ainfo->reg      = STK_BASE;
1246                 ainfo->regtype  = RegTypeBase;
1247                 sz->code_size  += 4;
1248                 sz->stack_size += ainfo->size;
1249                 sz->local_size += ainfo->size;
1250                 sz->offStruct  += ainfo->size;
1251         }
1252 }
1253
1254 /*========================= End of Function ========================*/
1255
1256 /*------------------------------------------------------------------*/
1257 /*                                                                  */
1258 /* Name         - calculate_sizes                                   */
1259 /*                                                                  */
1260 /* Function     - Determine the amount of space required for code   */
1261 /*                and stack. In addition determine starting points  */
1262 /*                for stack-based parameters, and area for struct-  */
1263 /*                ures being returned on the stack.                 */
1264 /*                                                                  */
1265 /*------------------------------------------------------------------*/
1266
1267 static CallInfo *
1268 calculate_sizes (MonoMethodSignature *sig, size_data *sz,
1269                  gboolean string_ctor)
1270 {
1271         guint i, fr, gr, size;
1272         int nParm = sig->hasthis + sig->param_count;
1273         guint32 simpletype, align;
1274         CallInfo *cinfo = g_malloc0 (sizeof (CallInfo) + sizeof (ArgInfo) * nParm);
1275
1276         fr                = 0;
1277         gr                = s390_r2;
1278         nParm             = 0;
1279         cinfo->struct_ret = 0;
1280         sz->offset        = 0;
1281         sz->offStruct     = S390_MINIMAL_STACK_SIZE;
1282         sz->retStruct     = 0;
1283         sz->stack_size    = S390_MINIMAL_STACK_SIZE;
1284         sz->code_size     = 0;
1285         sz->parm_size     = 0;
1286         sz->local_size    = 0;
1287
1288         /*----------------------------------------------------------*/
1289         /* We determine the size of the return code/stack in case we*/
1290         /* need to reserve a register to be used to address a stack */
1291         /* area that the callee will use.                           */
1292         /*----------------------------------------------------------*/
1293
1294         simpletype = mono_type_get_underlying_type (sig->ret)->type;
1295 enum_retvalue:
1296         switch (simpletype) {
1297                 case MONO_TYPE_BOOLEAN:
1298                 case MONO_TYPE_I1:
1299                 case MONO_TYPE_U1:
1300                 case MONO_TYPE_I2:
1301                 case MONO_TYPE_U2:
1302                 case MONO_TYPE_CHAR:
1303                 case MONO_TYPE_I4:
1304                 case MONO_TYPE_U4:
1305                 case MONO_TYPE_I:
1306                 case MONO_TYPE_U:
1307                 case MONO_TYPE_CLASS:
1308                 case MONO_TYPE_OBJECT:
1309                 case MONO_TYPE_SZARRAY:
1310                 case MONO_TYPE_ARRAY:
1311                 case MONO_TYPE_PTR:
1312                 case MONO_TYPE_FNPTR:
1313                 case MONO_TYPE_STRING:
1314                         cinfo->ret.reg = s390_r2;
1315                         sz->code_size += 4;
1316                         break;
1317                 case MONO_TYPE_R4:
1318                 case MONO_TYPE_R8:
1319                         cinfo->ret.reg = s390_f0;
1320                         sz->code_size += 4;
1321                         break;
1322                 case MONO_TYPE_I8:
1323                 case MONO_TYPE_U8:
1324                         cinfo->ret.reg = s390_r2;
1325                         sz->code_size += 4;
1326                         break;
1327                 case MONO_TYPE_GENERICINST:
1328                         if (!mono_type_generic_inst_is_valuetype (sig->ret)) {
1329                                 cinfo->ret.reg = s390_r2;
1330                                 sz->code_size += 4;
1331                                 break;
1332                         }
1333                         /* Fall through */
1334                 case MONO_TYPE_VALUETYPE: {
1335                         MonoClass *klass = mono_class_from_mono_type (sig->ret);
1336                         if (sig->ret->data.klass->enumtype) {
1337                                 simpletype = sig->ret->data.klass->enum_basetype->type;
1338                                 goto enum_retvalue;
1339                         }
1340                         if (sig->pinvoke)
1341                                 size = mono_class_native_size (klass, &align);
1342                         else
1343                                 size = mono_class_value_size (klass, &align);
1344
1345                         cinfo->ret.reg    = s390_r2;
1346                         cinfo->struct_ret = 1;
1347                         cinfo->ret.size   = size;
1348                         cinfo->ret.vtsize = size;
1349                         gr++;
1350                         break;
1351                 }
1352                 case MONO_TYPE_TYPEDBYREF:
1353                         size = sizeof (MonoTypedRef);
1354                         cinfo->ret.reg    = s390_r2;
1355                         cinfo->struct_ret = 1;
1356                         cinfo->ret.size   = size;
1357                         cinfo->ret.vtsize = size;
1358                         gr++;
1359                         break;
1360                 case MONO_TYPE_VOID:
1361                         break;
1362                 default:
1363                         g_error ("Can't handle as return value 0x%x", sig->ret->type);
1364         }
1365
1366         if (sig->hasthis) {
1367                 add_general (&gr, sz, cinfo->args+nParm, TRUE);
1368                 cinfo->args[nParm].size = sizeof(gpointer);
1369                 nParm++;
1370         }
1371
1372         /*----------------------------------------------------------*/
1373         /* We determine the size of the parameter code and stack    */
1374         /* requirements by checking the types and sizes of the      */
1375         /* parameters.                                              */
1376         /*----------------------------------------------------------*/
1377
1378         for (i = 0; i < sig->param_count; ++i) {
1379                 /*--------------------------------------------------*/
1380                 /* Handle vararg type calls. All args are put on    */
1381                 /* the stack.                                       */
1382                 /*--------------------------------------------------*/
1383                 if ((sig->call_convention == MONO_CALL_VARARG) &&
1384                     (i == sig->sentinelpos)) {
1385                         gr = S390_LAST_ARG_REG + 1;
1386                         add_general (&gr, sz, &cinfo->sigCookie, TRUE);
1387                 }
1388
1389                 if (sig->params [i]->byref) {
1390                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1391                         cinfo->args[nParm].size = sizeof(gpointer);
1392                         nParm++;
1393                         continue;
1394                 }
1395
1396                 simpletype = mono_type_get_underlying_type(sig->params [i])->type;
1397                 switch (simpletype) {
1398                 case MONO_TYPE_BOOLEAN:
1399                 case MONO_TYPE_I1:
1400                 case MONO_TYPE_U1:
1401                         cinfo->args[nParm].size = sizeof(char);
1402                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1403                         nParm++;
1404                         break;
1405                 case MONO_TYPE_I2:
1406                 case MONO_TYPE_U2:
1407                 case MONO_TYPE_CHAR:
1408                         cinfo->args[nParm].size = sizeof(short);
1409                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1410                         nParm++;
1411                         break;
1412                 case MONO_TYPE_I4:
1413                 case MONO_TYPE_U4:
1414                         cinfo->args[nParm].size = sizeof(int);
1415                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1416                         nParm++;
1417                         break;
1418                 case MONO_TYPE_I:
1419                 case MONO_TYPE_U:
1420                 case MONO_TYPE_PTR:
1421                 case MONO_TYPE_FNPTR:
1422                 case MONO_TYPE_CLASS:
1423                 case MONO_TYPE_OBJECT:
1424                 case MONO_TYPE_STRING:
1425                 case MONO_TYPE_SZARRAY:
1426                 case MONO_TYPE_ARRAY:
1427                         cinfo->args[nParm].size = sizeof(gpointer);
1428                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1429                         nParm++;
1430                         break;
1431                 case MONO_TYPE_I8:
1432                 case MONO_TYPE_U8:
1433                         cinfo->args[nParm].size = sizeof(long long);
1434                         add_general (&gr, sz, cinfo->args+nParm, FALSE);
1435                         nParm++;
1436                         break;
1437                 case MONO_TYPE_R4:
1438                         cinfo->args[nParm].size = sizeof(float);
1439                         add_float (&fr, sz, cinfo->args+nParm);
1440                         nParm++;
1441                         break;
1442                 case MONO_TYPE_R8:
1443                         cinfo->args[nParm].size = sizeof(double);
1444                         add_float (&fr, sz, cinfo->args+nParm);
1445                         nParm++;
1446                         break;
1447                 case MONO_TYPE_GENERICINST:
1448                         if (!mono_type_generic_inst_is_valuetype (sig->params [i])) {
1449                                 cinfo->args[nParm].size = sizeof(gpointer);
1450                                 add_general (&gr, sz, cinfo->args+nParm, TRUE);
1451                                 nParm++;
1452                                 break;
1453                         }
1454                         /* Fall through */
1455                 case MONO_TYPE_VALUETYPE: {
1456                         MonoMarshalType *info;
1457                         MonoClass *klass = mono_class_from_mono_type (sig->params [i]);
1458                         if (sig->pinvoke)
1459                                 size = mono_class_native_size (klass, &align);
1460                         else
1461                                 size = mono_class_value_size (klass, &align);
1462
1463                         info = mono_marshal_load_type_info (klass);
1464
1465                         if ((info->native_size == sizeof(float)) &&
1466                             (info->num_fields  == 1) &&
1467                             (info->fields[0].field->type->type == MONO_TYPE_R4)) {
1468                                 cinfo->args[nParm].size = sizeof(float);
1469                                 add_float(&fr, sz, cinfo->args+nParm);
1470                                 break;
1471                         }
1472
1473                         if ((info->native_size == sizeof(double)) &&
1474                             (info->num_fields  == 1) &&
1475                             (info->fields[0].field->type->type == MONO_TYPE_R8)) {
1476                                 cinfo->args[nParm].size = sizeof(double);
1477                                 add_float(&fr, sz, cinfo->args+nParm);
1478                                 break;
1479                         }
1480
1481                         cinfo->args[nParm].vtsize  = 0;
1482                         cinfo->args[nParm].size    = 0;
1483
1484                         switch (size) {
1485                                 /*----------------------------------*/
1486                                 /* On S/390, structures of size 1,  */
1487                                 /* 2, 4, and 8 bytes are passed in  */
1488                                 /* (a) register(s).                 */
1489                                 /*----------------------------------*/
1490                                 case 0:
1491                                 case 1:
1492                                 case 2:
1493                                 case 4:
1494                                         add_general(&gr, sz, cinfo->args+nParm, TRUE);
1495                                         cinfo->args[nParm].size    = size;
1496                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1497                                         nParm++;
1498                                         sz->local_size            += sizeof(long);
1499                                         break;
1500                                 case 8:
1501                                         add_general(&gr, sz, cinfo->args+nParm, FALSE);
1502                                         cinfo->args[nParm].size    = sizeof(long long);
1503                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1504                                         nParm++;
1505                                         sz->local_size            += sizeof(long);
1506                                         break;
1507                                 default:
1508                                         add_stackParm(&gr, sz, cinfo->args+nParm, size);
1509                                         nParm++;
1510                         }
1511                 }
1512                         break;
1513                 case MONO_TYPE_TYPEDBYREF: {
1514                         int size = sizeof (MonoTypedRef);
1515
1516                         cinfo->args[nParm].vtsize  = 0;
1517                         cinfo->args[nParm].size    = 0;
1518
1519                         switch (size) {
1520                                 /*----------------------------------*/
1521                                 /* On S/390, structures of size 1,  */
1522                                 /* 2, 4, and 8 bytes are passed in  */
1523                                 /* (a) register(s).                 */
1524                                 /*----------------------------------*/
1525                                 case 0:
1526                                 case 1:
1527                                 case 2:
1528                                 case 4:
1529                                         add_general(&gr, sz, cinfo->args+nParm, TRUE);
1530                                         cinfo->args[nParm].size    = size;
1531                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1532                                         nParm++;
1533                                         sz->local_size            += sizeof(long);
1534                                         break;
1535                                 case 8:
1536                                         add_general(&gr, sz, cinfo->args+nParm, FALSE);
1537                                         cinfo->args[nParm].size    = sizeof(long long);
1538                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1539                                         nParm++;
1540                                         sz->local_size            += sizeof(long);
1541                                         break;
1542                                 default:
1543                                         add_stackParm(&gr, sz, cinfo->args+nParm, size);
1544                                         nParm++;
1545                         }
1546                 }
1547                         break;
1548                 default:
1549                         g_error ("Can't trampoline 0x%x", sig->params [i]->type);
1550                 }
1551         }
1552
1553         /*----------------------------------------------------------*/
1554         /* If we are passing a structure back then if it won't be   */
1555         /* in a register(s) then we make room at the end of the     */
1556         /* parameters that may have been placed on the stack        */
1557         /*----------------------------------------------------------*/
1558         if (cinfo->struct_ret) {
1559                 cinfo->ret.offset = sz->stack_size;
1560                 switch (cinfo->ret.size) {
1561                 case 0:
1562                 case 1:
1563                 case 2:
1564                 case 4:
1565                 case 8:
1566                         break;
1567                 default:
1568                         sz->stack_size   += S390_ALIGN(cinfo->ret.size, align);
1569                 }
1570         }
1571
1572         /*----------------------------------------------------------*/
1573         /* Handle the case where there are no implicit arguments    */
1574         /*----------------------------------------------------------*/
1575         if ((sig->call_convention == MONO_CALL_VARARG) &&
1576             (sig->param_count == sig->sentinelpos)) {
1577                 gr = S390_LAST_ARG_REG + 1;
1578                 add_general (&gr, sz, &cinfo->sigCookie, TRUE);
1579         }
1580
1581         cinfo->lastgr   = gr;
1582         sz->stack_size  = sz->stack_size + sz->local_size + sz->parm_size +
1583                           sz->offset;
1584         sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1585
1586         return (cinfo);
1587 }
1588
1589 /*========================= End of Function ========================*/
1590
1591 /*------------------------------------------------------------------*/
1592 /*                                                                  */
1593 /* Name         - mono_arch_allocate_vars                           */
1594 /*                                                                  */
1595 /* Function     - Set var information according to the calling      */
1596 /*                convention for S/390. The local var stuff should  */
1597 /*                most likely be split in another method.           */
1598 /*                                                                  */
1599 /* Parameter    - @m - Compile unit.                                */
1600 /*                                                                  */
1601 /*------------------------------------------------------------------*/
1602
1603 void
1604 mono_arch_allocate_vars (MonoCompile *cfg)
1605 {
1606         MonoMethodSignature *sig;
1607         MonoMethodHeader *header;
1608         MonoInst *inst;
1609         CallInfo *cinfo;
1610         size_data sz;
1611         int iParm, iVar, offset, size, align, curinst;
1612         int frame_reg = STK_BASE;
1613         int sArg, eArg;
1614
1615         header  = mono_method_get_header (cfg->method);
1616
1617         cfg->flags |= MONO_CFG_HAS_SPILLUP;
1618
1619         /*---------------------------------------------------------*/
1620         /* We use the frame register also for any method that has  */
1621         /* filter clauses. This way, when the handlers are called, */
1622         /* the code will reference local variables using the frame */
1623         /* reg instead of the stack pointer: if we had to restore  */
1624         /* the stack pointer, we'd corrupt the method frames that  */
1625         /* are already on the stack (since filters get called      */
1626         /* before stack unwinding happens) when the filter code    */
1627         /* would call any method.                                  */
1628         /*---------------------------------------------------------*/
1629         if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
1630                 frame_reg = s390_r11;
1631
1632         cfg->frame_reg = frame_reg;
1633
1634         if (frame_reg != STK_BASE)
1635                 cfg->used_int_regs |= 1 << frame_reg;
1636
1637         sig     = mono_method_signature (cfg->method);
1638
1639         cinfo   = calculate_sizes (sig, &sz, sig->pinvoke);
1640
1641         if (cinfo->struct_ret) {
1642                 cfg->ret->opcode = OP_REGVAR;
1643                 cfg->ret->inst_c0 = s390_r2;
1644         } else {
1645                 switch (mono_type_get_underlying_type (sig->ret)->type) {
1646                 case MONO_TYPE_VOID:
1647                         break;
1648                 default:
1649                         cfg->ret->opcode = OP_REGVAR;
1650                         cfg->ret->dreg   = s390_r2;
1651                         break;
1652                 }
1653         }
1654
1655         /*--------------------------------------------------------------*/
1656         /* local vars are at a positive offset from the stack pointer   */
1657         /* also note that if the function uses alloca, we use s390_r11  */
1658         /* to point at the local variables.                             */
1659         /* add parameter area size for called functions                 */
1660         /*--------------------------------------------------------------*/
1661         offset          = (cfg->param_area + S390_MINIMAL_STACK_SIZE);
1662         cfg->sig_cookie = 0;
1663
1664         if (cinfo->struct_ret) {
1665                 inst               = cfg->ret;
1666                 offset             = S390_ALIGN(offset, sizeof(gpointer));
1667                 inst->inst_offset  = offset;
1668                 inst->opcode       = OP_REGOFFSET;
1669                 inst->inst_basereg = frame_reg;
1670                 offset            += sizeof(gpointer);
1671                 if ((sig->call_convention == MONO_CALL_VARARG) &&
1672                     (!retFitsInReg (cinfo->ret.size)))
1673                         cfg->sig_cookie += cinfo->ret.size;
1674         }
1675
1676         if (sig->hasthis) {
1677                 inst = cfg->varinfo [0];
1678                 if (inst->opcode != OP_REGVAR) {
1679                         inst->opcode       = OP_REGOFFSET;
1680                         inst->inst_basereg = frame_reg;
1681                         offset             = S390_ALIGN(offset, sizeof(gpointer));
1682                         inst->inst_offset  = offset;
1683                         offset            += sizeof (gpointer);
1684                 }
1685                 curinst = sArg = 1;
1686         } else {
1687                 curinst = sArg = 0;
1688         }
1689
1690         eArg = sig->param_count + sArg;
1691
1692         if (sig->call_convention == MONO_CALL_VARARG)
1693                 cfg->sig_cookie += S390_MINIMAL_STACK_SIZE;
1694
1695         for (iParm = sArg; iParm < eArg; ++iParm) {
1696                 inst = cfg->varinfo [curinst];
1697                 if (inst->opcode != OP_REGVAR) {
1698                         switch (cinfo->args[iParm].regtype) {
1699                                 case RegTypeStructByAddr :
1700                                 if (cinfo->args[iParm].reg == STK_BASE) {
1701                                         inst->opcode       = OP_S390_LOADARG;
1702                                         inst->inst_basereg = frame_reg;
1703                                         size               = abs(cinfo->args[iParm].vtsize);
1704                                         offset             = S390_ALIGN(offset, sizeof(long));
1705                                         inst->inst_offset  = offset;
1706                                         inst->backend.arg_info       = cinfo->args[iParm].offset;
1707                                 } else {
1708                                         inst->opcode       = OP_S390_ARGREG;
1709                                         inst->inst_basereg = frame_reg;
1710                                         size               = sizeof(gpointer);
1711                                         offset             = S390_ALIGN(offset, size);
1712                                         inst->inst_offset  = offset;
1713                                         inst->backend.arg_info       = cinfo->args[iParm].offset;
1714                                 }
1715                                         break;
1716                                 case RegTypeStructByVal :
1717                                         inst->opcode       = OP_S390_ARGPTR;
1718                                         inst->inst_basereg = frame_reg;
1719                                         size               = cinfo->args[iParm].size;
1720                                         offset             = S390_ALIGN(offset, size);
1721                                         inst->inst_offset  = offset;
1722                                         inst->backend.arg_info       = cinfo->args[iParm].offset;
1723                                         break;
1724                                 default :
1725                                 if (cinfo->args[iParm].reg != STK_BASE) {
1726                                         inst->opcode       = OP_REGOFFSET;
1727                                         inst->inst_basereg = frame_reg;
1728                                         size               = (cinfo->args[iParm].size < 8
1729                                                               ? sizeof(long)
1730                                                               : sizeof(long long));
1731                                         offset             = S390_ALIGN(offset, size);
1732                                         inst->inst_offset  = offset;
1733                                 } else {
1734                                         inst->opcode       = OP_S390_STKARG;
1735                                         inst->inst_basereg = frame_reg;
1736                                         size               = (cinfo->args[iParm].size < 4
1737                                                               ? 4 - cinfo->args[iParm].size
1738                                                               : 0);
1739                                         inst->inst_offset  = cinfo->args[iParm].offset +
1740                                                              size;
1741                                         inst->backend.arg_info       = 0;
1742                                         size               = sizeof(long);
1743                                 }
1744                         }
1745                         if ((sig->call_convention == MONO_CALL_VARARG) &&
1746                             (cinfo->args[iParm].regtype != RegTypeGeneral) &&
1747                             (iParm < sig->sentinelpos))
1748                                 cfg->sig_cookie += size;
1749
1750                         offset += size;
1751                 }
1752                 curinst++;
1753         }
1754
1755         curinst = cfg->locals_start;
1756         for (iVar = curinst; iVar < cfg->num_varinfo; ++iVar) {
1757                 inst = cfg->varinfo [iVar];
1758                 if ((inst->flags & MONO_INST_IS_DEAD) ||
1759                     (inst->opcode == OP_REGVAR))
1760                         continue;
1761
1762                 /*--------------------------------------------------*/
1763                 /* inst->backend.is_pinvoke indicates native sized value types, */
1764                 /* this is used by the pinvoke wrappers when they   */
1765                 /* call functions returning structure               */
1766                 /*--------------------------------------------------*/
1767                 if (inst->backend.is_pinvoke && MONO_TYPE_ISSTRUCT (inst->inst_vtype))
1768                         size = mono_class_native_size (mono_class_from_mono_type(inst->inst_vtype), &align);
1769                 else
1770                         size = mono_type_size (inst->inst_vtype, &align);
1771
1772                 offset             = S390_ALIGN(offset, align);
1773                 inst->inst_offset  = offset;
1774                 inst->opcode       = OP_REGOFFSET;
1775                 inst->inst_basereg = frame_reg;
1776                 offset            += size;
1777                 DEBUG (g_print("allocating local %d to %ld\n", iVar, inst->inst_offset));
1778         }
1779
1780         /*------------------------------------------------------*/
1781         /* Allow space for the trace method stack area if needed*/
1782         /*------------------------------------------------------*/
1783         if (mono_jit_trace_calls != NULL && mono_trace_eval (cfg->method)) {
1784                 offset += S390_TRACE_STACK_SIZE;
1785         }
1786
1787         /*------------------------------------------------------*/
1788         /* Reserve space to save LMF and caller saved registers */
1789         /*------------------------------------------------------*/
1790         if (cfg->method->save_lmf)
1791                 offset += sizeof (MonoLMF);
1792
1793         /*------------------------------------------------------*/
1794         /* align the offset                                     */
1795         /*------------------------------------------------------*/
1796         cfg->stack_offset = S390_ALIGN(offset, S390_STACK_ALIGNMENT);
1797
1798 }
1799
1800 /*========================= End of Function ========================*/
1801
1802 /*------------------------------------------------------------------*/
1803 /*                                                                  */
1804 /* Name         - mono_arch_call_opcode                             */
1805 /*                                                                  */
1806 /* Function     - Take the arguments and generate the arch-specific */
1807 /*                instructions to properly call the function. This  */
1808 /*                includes pushing, moving argments to the correct  */
1809 /*                etc.                                              */
1810 /*                                                                  */
1811 /*------------------------------------------------------------------*/
1812
1813 MonoCallInst*
1814 mono_arch_call_opcode (MonoCompile *cfg, MonoBasicBlock* bb,
1815                        MonoCallInst *call, int is_virtual) {
1816         MonoInst *in;
1817         MonoCallArgParm *arg;
1818         MonoMethodSignature *sig;
1819         int i, n, lParamArea;
1820         CallInfo *cinfo;
1821         ArgInfo *ainfo;
1822         size_data sz;
1823         int stackSize;
1824
1825         sig = call->signature;
1826         n = sig->param_count + sig->hasthis;
1827         DEBUG (g_print ("Call requires: %d parameters\n",n));
1828
1829         cinfo = calculate_sizes (sig, &sz, sig->pinvoke);
1830
1831         stackSize         = sz.stack_size + sz.local_size + sz.parm_size + sz.offset;
1832         call->stack_usage = MAX(stackSize, call->stack_usage);
1833         lParamArea        = MAX((call->stack_usage-S390_MINIMAL_STACK_SIZE-sz.parm_size), 0);
1834         cfg->param_area   = MAX(((signed) cfg->param_area), lParamArea);
1835         cfg->flags       |= MONO_CFG_HAS_CALLS;
1836
1837         if (cinfo->struct_ret)
1838                 call->used_iregs |= 1 << cinfo->ret.reg;
1839
1840         for (i = 0; i < n; ++i) {
1841                 ainfo = cinfo->args + i;
1842
1843                 if ((sig->call_convention == MONO_CALL_VARARG) &&
1844                     (i == sig->sentinelpos)) {
1845                         emit_sig_cookie (cfg, call, cinfo, ainfo->size);
1846                 }
1847
1848                 if (is_virtual && i == 0) {
1849                         /* the argument will be attached to the call instrucion */
1850                         in = call->args [i];
1851                         call->used_iregs |= 1 << ainfo->reg;
1852                 } else {
1853                         MONO_INST_NEW_CALL_ARG (cfg, arg, OP_OUTARG);
1854                         in                  = call->args [i];
1855                         arg->ins.cil_code   = in->cil_code;
1856                         arg->ins.inst_left  = in;
1857                         arg->ins.type       = in->type;
1858                         /* prepend, we'll need to reverse them later */
1859                         arg->ins.next       = call->out_args;
1860                         call->out_args      = (MonoInst *) arg;
1861                         arg->ins.inst_right = (MonoInst *) call;
1862                         if (ainfo->regtype == RegTypeGeneral) {
1863                                 arg->ins.backend.reg3   = ainfo->reg;
1864                                 call->used_iregs |= 1 << ainfo->reg;
1865                                 if (arg->ins.type == STACK_I8)
1866                                         call->used_iregs |= 1 << (ainfo->reg + 1);
1867                         } else if (ainfo->regtype == RegTypeStructByAddr) {
1868                                 call->used_iregs |= 1 << ainfo->reg;
1869                                 arg->ins.sreg1    = ainfo->reg;
1870                                 arg->ins.opcode   = OP_OUTARG_VT;
1871                                 arg->size         = -ainfo->vtsize;
1872                                 arg->offset       = ainfo->offset;
1873                                 arg->offPrm       = ainfo->offparm + sz.offStruct;
1874                         } else if (ainfo->regtype == RegTypeStructByVal) {
1875                                 if (ainfo->reg != STK_BASE) {
1876                                         switch (ainfo->size) {
1877                                         case 0:
1878                                         case 1:
1879                                         case 2:
1880                                         case 4:
1881                                                 call->used_iregs |= 1 << ainfo->reg;
1882                                                 break;
1883                                         case 8:
1884                                                 call->used_iregs |= 1 << ainfo->reg;
1885                                                 call->used_iregs |= 1 << (ainfo->reg+1);
1886                                                 break;
1887                                         default:
1888                                                 call->used_iregs |= 1 << ainfo->reg;
1889                                         }
1890                                 }
1891                                 arg->ins.sreg1  = ainfo->reg;
1892                                 arg->ins.opcode = OP_OUTARG_VT;
1893                                 arg->size       = ainfo->size;
1894                                 arg->offset     = ainfo->offset;
1895                                 arg->offPrm     = ainfo->offparm + sz.offStruct;
1896                         } else if (ainfo->regtype == RegTypeBase) {
1897                                 arg->ins.opcode   = OP_OUTARG_MEMBASE;
1898                                 arg->ins.sreg1    = ainfo->reg;
1899                                 arg->size         = ainfo->size;
1900                                 arg->offset       = ainfo->offset;
1901                                 call->used_iregs |= 1 << ainfo->reg;
1902                         } else if (ainfo->regtype == RegTypeFP) {
1903                                 arg->ins.backend.reg3   = ainfo->reg;
1904                                 call->used_fregs |= 1 << ainfo->reg;
1905                                 if (ainfo->size == 4)
1906                                         arg->ins.opcode = OP_OUTARG_R4;
1907                                 else
1908                                         arg->ins.opcode = OP_OUTARG_R8;
1909                         } else {
1910                                 g_assert_not_reached ();
1911                         }
1912                 }
1913         }
1914
1915         /*
1916          * Handle the case where there are no implicit arguments
1917          */
1918         if ((sig->call_convention == MONO_CALL_VARARG) &&
1919             (i == sig->sentinelpos)) {
1920                 emit_sig_cookie (cfg, call, cinfo, ainfo->size);
1921         }
1922
1923         /*
1924          * Reverse the call->out_args list.
1925          */
1926         {
1927                 MonoInst *prev = NULL, *list = call->out_args, *next;
1928                 while (list) {
1929                         next = list->next;
1930                         list->next = prev;
1931                         prev = list;
1932                         list = next;
1933                 }
1934                 call->out_args = prev;
1935         }
1936
1937         g_free (cinfo);
1938         return call;
1939 }
1940
1941 /*========================= End of Function ========================*/
1942
1943 /*------------------------------------------------------------------*/
1944 /*                                                                  */
1945 /* Name         - emit_sig_cookie.                                  */
1946 /*                                                                  */
1947 /* Function     - For variable length parameter lists construct a   */
1948 /*                signature cookie and emit it.                     */
1949 /*                                                                  */
1950 /*------------------------------------------------------------------*/
1951
1952 static void
1953 emit_sig_cookie (MonoCompile *cfg, MonoCallInst *call,
1954                  CallInfo *cinfo, int argSize)
1955 {
1956         MonoCallArgParm *arg;
1957         MonoMethodSignature *tmpSig;
1958         MonoInst *sigArg;
1959
1960         cfg->disable_aot = TRUE;
1961
1962         /*----------------------------------------------------------*/
1963         /* mono_ArgIterator_Setup assumes the signature cookie is   */
1964         /* passed first and all the arguments which were before it  */
1965         /* passed on the stack after the signature. So compensate   */
1966         /* by passing a different signature.                        */
1967         /*----------------------------------------------------------*/
1968         tmpSig = mono_metadata_signature_dup (call->signature);
1969         tmpSig->param_count -= call->signature->sentinelpos;
1970         tmpSig->sentinelpos  = 0;
1971         if (tmpSig->param_count > 0)
1972                 memcpy (tmpSig->params,
1973                         call->signature->params + call->signature->sentinelpos,
1974                         tmpSig->param_count * sizeof(MonoType *));
1975
1976         MONO_INST_NEW (cfg, sigArg, OP_ICONST);
1977         sigArg->inst_p0 = tmpSig;
1978
1979         MONO_INST_NEW_CALL_ARG (cfg, arg, OP_OUTARG_MEMBASE);
1980         arg->ins.inst_left   = sigArg;
1981         arg->ins.inst_right  = (MonoInst *) call;
1982         arg->size            = argSize;
1983         arg->offset          = cinfo->sigCookie.offset;
1984         arg->ins.next        = call->out_args;
1985         call->out_args       = (MonoInst *) arg;
1986 }
1987
1988 /*========================= End of Function ========================*/
1989
1990 /*------------------------------------------------------------------*/
1991 /*                                                                  */
1992 /* Name         - mono_arch_instrument_mem_needs                    */
1993 /*                                                                  */
1994 /* Function     - Allow tracing to work with this interface (with   */
1995 /*                an optional argument).                            */
1996 /*                                                                  */
1997 /*------------------------------------------------------------------*/
1998
1999 void
2000 mono_arch_instrument_mem_needs (MonoMethod *method, int *stack, int *code)
2001 {
2002         /* no stack room needed now (may be needed for FASTCALL-trace support) */
2003         *stack = 0;
2004         /* split prolog-epilog requirements? */
2005         *code = 50; /* max bytes needed: check this number */
2006 }
2007
2008 /*========================= End of Function ========================*/
2009
2010 /*------------------------------------------------------------------*/
2011 /*                                                                  */
2012 /* Name         - mono_arch_instrument_prolog                       */
2013 /*                                                                  */
2014 /* Function     - Create an "instrumented" prolog.                  */
2015 /*                                                                  */
2016 /*------------------------------------------------------------------*/
2017
2018 void*
2019 mono_arch_instrument_prolog (MonoCompile *cfg, void *func, void *p,
2020                              gboolean enable_arguments)
2021 {
2022         guchar  *code = p;
2023         int     parmOffset,
2024                 fpOffset,
2025                 baseReg;
2026
2027         parmOffset = cfg->stack_usage - S390_TRACE_STACK_SIZE;
2028         if (cfg->method->save_lmf)
2029                 parmOffset -= sizeof(MonoLMF);
2030         fpOffset   = parmOffset + (5*sizeof(gint32));
2031         if (fpOffset > 4096) {
2032                 s390_lr (code, s390_r12, STK_BASE);
2033                 baseReg = s390_r12;
2034                 while (fpOffset > 4096) {
2035                         s390_ahi (code, baseReg, 4096);
2036                         fpOffset   -= 4096;
2037                         parmOffset -= 4096;
2038                 }
2039         } else {
2040                 baseReg = STK_BASE;
2041         }
2042
2043         s390_stm  (code, s390_r2, s390_r6, baseReg, parmOffset);
2044         s390_std  (code, s390_f0, 0, baseReg, fpOffset);
2045         s390_std  (code, s390_f1, 0, baseReg, fpOffset+sizeof(gdouble));
2046         s390_std  (code, s390_f2, 0, baseReg, fpOffset+2*sizeof(gdouble));
2047         s390_basr (code, s390_r13, 0);
2048         s390_j    (code, 6);
2049         s390_word (code, cfg->method);
2050         s390_word (code, func);
2051         s390_l    (code, s390_r2, 0, s390_r13, 4);
2052         s390_la   (code, s390_r3, 0, baseReg, parmOffset);
2053         s390_lr   (code, s390_r4, STK_BASE);
2054         s390_ahi  (code, s390_r4, cfg->stack_usage);
2055         s390_l    (code, s390_r1, 0, s390_r13, 8);
2056         s390_basr (code, s390_r14, s390_r1);
2057         s390_ld   (code, s390_f2, 0, baseReg, fpOffset+2*sizeof(gdouble));
2058         s390_ld   (code, s390_f1, 0, baseReg, fpOffset+sizeof(gdouble));
2059         s390_ld   (code, s390_f0, 0, baseReg, fpOffset);
2060         s390_lm   (code, s390_r2, s390_r6, baseReg, parmOffset);
2061
2062         return code;
2063 }
2064
2065 /*========================= End of Function ========================*/
2066
2067 /*------------------------------------------------------------------*/
2068 /*                                                                  */
2069 /* Name         - mono_arch_instrument_epilog                       */
2070 /*                                                                  */
2071 /* Function     - Create an epilog that will handle the returned    */
2072 /*                values used in instrumentation.                   */
2073 /*                                                                  */
2074 /*------------------------------------------------------------------*/
2075
2076 void*
2077 mono_arch_instrument_epilog (MonoCompile *cfg, void *func, void *p, gboolean enable_arguments)
2078 {
2079         guchar     *code = p;
2080         int        save_mode = SAVE_NONE,
2081                    saveOffset;
2082         MonoMethod *method = cfg->method;
2083         int        rtype = mono_type_get_underlying_type (mono_method_signature (method)->ret)->type;
2084
2085         saveOffset = cfg->stack_usage - S390_TRACE_STACK_SIZE;
2086         if (method->save_lmf)
2087                 saveOffset -= sizeof(MonoLMF);
2088
2089 handle_enum:
2090         switch (rtype) {
2091         case MONO_TYPE_VOID:
2092                 /* special case string .ctor icall */
2093                 if (strcmp (".ctor", method->name) && method->klass == mono_defaults.string_class)
2094                         save_mode = SAVE_ONE;
2095                 else
2096                         save_mode = SAVE_NONE;
2097                 break;
2098         case MONO_TYPE_I8:
2099         case MONO_TYPE_U8:
2100                 save_mode = SAVE_TWO;
2101                 break;
2102         case MONO_TYPE_R4:
2103                 save_mode = SAVE_R4;
2104                 break;
2105         case MONO_TYPE_R8:
2106                 save_mode = SAVE_R8;
2107                 break;
2108         case MONO_TYPE_VALUETYPE:
2109                 if (mono_method_signature (method)->ret->data.klass->enumtype) {
2110                         rtype = mono_method_signature (method)->ret->data.klass->enum_basetype->type;
2111                         goto handle_enum;
2112                 }
2113                 save_mode = SAVE_STRUCT;
2114                 break;
2115         default:
2116                 save_mode = SAVE_ONE;
2117                 break;
2118         }
2119
2120         switch (save_mode) {
2121         case SAVE_TWO:
2122                 s390_stm (code, s390_r2, s390_r3, cfg->frame_reg, saveOffset);
2123                 if (enable_arguments) {
2124                         s390_lr (code, s390_r4, s390_r3);
2125                         s390_lr (code, s390_r3, s390_r2);
2126                 }
2127                 break;
2128         case SAVE_ONE:
2129                 s390_st (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2130                 if (enable_arguments) {
2131                         s390_lr (code, s390_r3, s390_r2);
2132                 }
2133                 break;
2134         case SAVE_R4:
2135                 s390_std (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2136                 if (enable_arguments) {
2137                         s390_ldebr (code, s390_f0, s390_f0);
2138                 }
2139                 break;
2140         case SAVE_R8:
2141                 s390_std (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2142                 break;
2143         case SAVE_STRUCT:
2144                 s390_st (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2145                 if (enable_arguments) {
2146                         s390_l (code, s390_r3, 0, cfg->frame_reg,
2147                                 S390_MINIMAL_STACK_SIZE+cfg->param_area);
2148                 }
2149                 break;
2150         case SAVE_NONE:
2151         default:
2152                 break;
2153         }
2154
2155         s390_basr (code, s390_r13, 0);
2156         s390_j    (code, 6);
2157         s390_word (code, cfg->method);
2158         s390_word (code, func);
2159         s390_l    (code, s390_r2, 0, s390_r13, 4);
2160         s390_l    (code, s390_r1, 0, s390_r13, 8);
2161         s390_basr (code, s390_r14, s390_r1);
2162
2163         switch (save_mode) {
2164         case SAVE_TWO:
2165                 s390_lm  (code, s390_r2, s390_r3, cfg->frame_reg, saveOffset);
2166                 break;
2167         case SAVE_ONE:
2168                 s390_l   (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2169                 break;
2170         case SAVE_R4:
2171         case SAVE_R8:
2172                 s390_ld  (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2173                 break;
2174         case SAVE_STRUCT:
2175                 s390_l   (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2176                 break;
2177         case SAVE_NONE:
2178         default:
2179                 break;
2180         }
2181
2182         return code;
2183 }
2184
2185 /*========================= End of Function ========================*/
2186
2187 /*------------------------------------------------------------------*/
2188 /*                                                                  */
2189 /* Name         - peephole_pass                                     */
2190 /*                                                                  */
2191 /* Function     - Form a peephole pass at the code looking for      */
2192 /*                simple optimizations.                             */
2193 /*                                                                  */
2194 /*------------------------------------------------------------------*/
2195
2196 static void
2197 peephole_pass (MonoCompile *cfg, MonoBasicBlock *bb)
2198 {
2199         MonoInst *ins, *last_ins = NULL;
2200         ins = bb->code;
2201
2202         while (ins) {
2203
2204                 switch (ins->opcode) {
2205                 case OP_MUL_IMM:
2206                         /* remove unnecessary multiplication with 1 */
2207                         if (ins->inst_imm == 1) {
2208                                 if (ins->dreg != ins->sreg1) {
2209                                         ins->opcode = OP_MOVE;
2210                                 } else {
2211                                         last_ins->next = ins->next;
2212                                         ins = ins->next;
2213                                         continue;
2214                                 }
2215                         }
2216                         break;
2217                 case OP_LOAD_MEMBASE:
2218                 case OP_LOADI4_MEMBASE:
2219                         /*
2220                          * OP_STORE_MEMBASE_REG reg, offset(basereg)
2221                          * OP_LOAD_MEMBASE offset(basereg), reg
2222                          */
2223                         if (last_ins && (last_ins->opcode == OP_STOREI4_MEMBASE_REG
2224                                          || last_ins->opcode == OP_STORE_MEMBASE_REG) &&
2225                             ins->inst_basereg == last_ins->inst_destbasereg &&
2226                             ins->inst_offset == last_ins->inst_offset) {
2227                                 if (ins->dreg == last_ins->sreg1) {
2228                                         last_ins->next = ins->next;
2229                                         ins = ins->next;
2230                                         continue;
2231                                 } else {
2232                                         ins->opcode = OP_MOVE;
2233                                         ins->sreg1 = last_ins->sreg1;
2234                                 }
2235
2236                         /*
2237                          * Note: reg1 must be different from the basereg in the second load
2238                          * OP_LOAD_MEMBASE offset(basereg), reg1
2239                          * OP_LOAD_MEMBASE offset(basereg), reg2
2240                          * -->
2241                          * OP_LOAD_MEMBASE offset(basereg), reg1
2242                          * OP_MOVE reg1, reg2
2243                          */
2244                         } if (last_ins && (last_ins->opcode == OP_LOADI4_MEMBASE
2245                                            || last_ins->opcode == OP_LOAD_MEMBASE) &&
2246                               ins->inst_basereg != last_ins->dreg &&
2247                               ins->inst_basereg == last_ins->inst_basereg &&
2248                               ins->inst_offset == last_ins->inst_offset) {
2249
2250                                 if (ins->dreg == last_ins->dreg) {
2251                                         last_ins->next = ins->next;
2252                                         ins = ins->next;
2253                                         continue;
2254                                 } else {
2255                                         ins->opcode = OP_MOVE;
2256                                         ins->sreg1 = last_ins->dreg;
2257                                 }
2258
2259                                 //g_assert_not_reached ();
2260
2261 #if 0
2262                         /*
2263                          * OP_STORE_MEMBASE_IMM imm, offset(basereg)
2264                          * OP_LOAD_MEMBASE offset(basereg), reg
2265                          * -->
2266                          * OP_STORE_MEMBASE_IMM imm, offset(basereg)
2267                          * OP_ICONST reg, imm
2268                          */
2269                         } else if (last_ins && (last_ins->opcode == OP_STOREI4_MEMBASE_IMM
2270                                                 || last_ins->opcode == OP_STORE_MEMBASE_IMM) &&
2271                                    ins->inst_basereg == last_ins->inst_destbasereg &&
2272                                    ins->inst_offset == last_ins->inst_offset) {
2273                                 //static int c = 0; printf ("MATCHX %s %d\n", cfg->method->name,c++);
2274                                 ins->opcode = OP_ICONST;
2275                                 ins->inst_c0 = last_ins->inst_imm;
2276                                 g_assert_not_reached (); // check this rule
2277 #endif
2278                         }
2279                         break;
2280                 case OP_LOADU1_MEMBASE:
2281                 case OP_LOADI1_MEMBASE:
2282                         if (last_ins && (last_ins->opcode == OP_STOREI1_MEMBASE_REG) &&
2283                                         ins->inst_basereg == last_ins->inst_destbasereg &&
2284                                         ins->inst_offset == last_ins->inst_offset) {
2285                                 if (ins->dreg == last_ins->sreg1) {
2286                                         last_ins->next = ins->next;
2287                                         ins = ins->next;
2288                                         continue;
2289                                 } else {
2290                                         //static int c = 0; printf ("MATCHX %s %d\n", cfg->method->name,c++);
2291                                         ins->opcode = OP_MOVE;
2292                                         ins->sreg1 = last_ins->sreg1;
2293                                 }
2294                         }
2295                         break;
2296                 case OP_LOADU2_MEMBASE:
2297                 case OP_LOADI2_MEMBASE:
2298                         if (last_ins && (last_ins->opcode == OP_STOREI2_MEMBASE_REG) &&
2299                                         ins->inst_basereg == last_ins->inst_destbasereg &&
2300                                         ins->inst_offset == last_ins->inst_offset) {
2301                                 if (ins->dreg == last_ins->sreg1) {
2302                                         last_ins->next = ins->next;
2303                                         ins = ins->next;
2304                                         continue;
2305                                 } else {
2306                                         ins->opcode = OP_MOVE;
2307                                         ins->sreg1 = last_ins->sreg1;
2308                                 }
2309                         }
2310                         break;
2311                 case CEE_CONV_I4:
2312                 case CEE_CONV_U4:
2313                 case OP_MOVE:
2314                         /*
2315                          * OP_MOVE reg, reg
2316                          */
2317                         if (ins->dreg == ins->sreg1) {
2318                                 if (last_ins)
2319                                         last_ins->next = ins->next;
2320                                 ins = ins->next;
2321                                 continue;
2322                         }
2323                         /*
2324                          * OP_MOVE sreg, dreg
2325                          * OP_MOVE dreg, sreg
2326                          */
2327                         if (last_ins && last_ins->opcode == OP_MOVE &&
2328                             ins->sreg1 == last_ins->dreg &&
2329                             ins->dreg == last_ins->sreg1) {
2330                                 last_ins->next = ins->next;
2331                                 ins = ins->next;
2332                                 continue;
2333                         }
2334                         break;
2335                 }
2336                 last_ins = ins;
2337                 ins = ins->next;
2338         }
2339         bb->last_ins = last_ins;
2340 }
2341
2342 /*========================= End of Function ========================*/
2343
2344 /*------------------------------------------------------------------*/
2345 /*                                                                  */
2346 /* Name         - mono_arch_local_regalloc.                         */
2347 /*                                                                  */
2348 /* Function     - We first scan the list of instructions and we     */
2349 /*                save the liveness information of each register    */
2350 /*                (when the register is first used, when its value  */
2351 /*                is set etc.). We also reverse the list of instr-  */
2352 /*                uctions (in the InstList list) because assigning  */
2353 /*                registers backwards allows for more tricks to be  */
2354 /*                used.                                             */
2355 /*                                                                  */
2356 /*------------------------------------------------------------------*/
2357
2358 void
2359 mono_arch_local_regalloc (MonoCompile *cfg, MonoBasicBlock *bb)
2360 {
2361         mono_local_regalloc(cfg, bb);
2362 }
2363
2364 /*========================= End of Function ========================*/
2365
2366 /*------------------------------------------------------------------*/
2367 /*                                                                  */
2368 /* Name         - emit_float_to_int                                 */
2369 /*                                                                  */
2370 /* Function     - Create instructions which will convert a floating */
2371 /*                point value to integer.                           */
2372 /*                                                                  */
2373 /*------------------------------------------------------------------*/
2374
2375 static guchar*
2376 emit_float_to_int (MonoCompile *cfg, guchar *code, int dreg, int sreg, int size, gboolean is_signed)
2377 {
2378         /* sreg is a float, dreg is an integer reg. */
2379         if (is_signed) {
2380                 s390_cfdbr (code, dreg, 5, sreg);
2381                 switch (size) {
2382                         case 1:
2383                                 s390_lhi  (code, s390_r0, 0);
2384                                 s390_lhi  (code, s390_r13, 0xff);
2385                                 s390_ltr  (code, dreg, dreg);
2386                                 s390_jnl  (code, 4);
2387                                 s390_lhi  (code, s390_r0, 0x80);
2388                                 s390_nr   (code, dreg, s390_r13);
2389                                 s390_or   (code, dreg, s390_r0);
2390                                 break;
2391                 }
2392         } else {
2393                 short *o[1];
2394                 s390_basr   (code, s390_r13, 0);
2395                 s390_j      (code, 10);
2396                 s390_llong  (code, 0x41e0000000000000);
2397                 s390_llong  (code, 0x41f0000000000000);
2398                 s390_ldr    (code, s390_f15, sreg);
2399                 s390_cdb    (code, s390_f15, 0, s390_r13, 4);
2400                 s390_jl     (code, 0); CODEPTR(code, o[0]);
2401                 s390_sdb    (code, s390_f15, 0, s390_r13, 12);
2402                 s390_cfdbr  (code, dreg, 7, s390_f15);
2403                 s390_j      (code, 4);
2404                 PTRSLOT(code, o[0]);
2405                 s390_cfdbr  (code, dreg, 5, sreg);
2406                 switch (size) {
2407                         case 1:
2408                                 s390_lhi  (code, s390_r0, 0xff);
2409                                 s390_nr   (code, dreg, s390_r0);
2410                                 break;
2411                         case 2:
2412                                 s390_lhi  (code, s390_r0, -1);
2413                                 s390_srl  (code, s390_r0, 0, 16);
2414                                 s390_nr   (code, dreg, s390_r0);
2415                                 break;
2416                 }
2417         }
2418         return code;
2419 }
2420
2421 /*========================= End of Function ========================*/
2422
2423 /*------------------------------------------------------------------*/
2424 /*                                                                  */
2425 /* Name         - mono_arch_output_basic_block                      */
2426 /*                                                                  */
2427 /* Function     - Perform the "real" work of emitting instructions  */
2428 /*                that will do the work of in the basic block.      */
2429 /*                                                                  */
2430 /*------------------------------------------------------------------*/
2431
2432 void
2433 mono_arch_output_basic_block (MonoCompile *cfg, MonoBasicBlock *bb)
2434 {
2435         MonoInst *ins;
2436         MonoCallInst *call;
2437         guint offset;
2438         guint8 *code = cfg->native_code + cfg->code_len;
2439         MonoInst *last_ins = NULL;
2440         guint last_offset = 0;
2441         int max_len, cpos, src2;
2442
2443         if (cfg->opt & MONO_OPT_PEEPHOLE)
2444                 peephole_pass (cfg, bb);
2445
2446         /* we don't align basic blocks of loops on s390 */
2447
2448         if (cfg->verbose_level > 2)
2449                 g_print ("Basic block %d starting at offset 0x%x\n", bb->block_num, bb->native_offset);
2450
2451         cpos = bb->max_offset;
2452
2453         if (cfg->prof_options & MONO_PROFILE_COVERAGE) {
2454                 //MonoCoverageInfo *cov = mono_get_coverage_info (cfg->method);
2455                 //g_assert (!mono_compile_aot);
2456                 //cpos += 6;
2457                 //if (bb->cil_code)
2458                 //      cov->data [bb->dfn].iloffset = bb->cil_code - cfg->cil_code;
2459                 /* this is not thread save, but good enough */
2460                 /* fixme: howto handle overflows? */
2461                 //x86_inc_mem (code, &cov->data [bb->dfn].count);
2462         }
2463
2464         ins = bb->code;
2465         while (ins) {
2466                 offset = code - cfg->native_code;
2467
2468                 max_len = ((guint8 *)ins_spec [ins->opcode])[MONO_INST_LEN];
2469
2470                 if (offset > (cfg->code_size - max_len - 16)) {
2471                         cfg->code_size *= 2;
2472                         cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
2473                         code = cfg->native_code + offset;
2474                 }
2475
2476                 mono_debug_record_line_number (cfg, ins, offset);
2477
2478                 switch (ins->opcode) {
2479                 case OP_STOREI1_MEMBASE_IMM: {
2480                         s390_lhi (code, s390_r0, ins->inst_imm);
2481                         if (s390_is_uimm12(ins->inst_offset))
2482                                 s390_stc (code, s390_r0, 0, ins->inst_destbasereg, ins->inst_offset);
2483                         else {
2484                                 s390_basr (code, s390_r13, 0);
2485                                 s390_j    (code, 4);
2486                                 s390_word (code, ins->inst_offset);
2487                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2488                                 s390_stc  (code, s390_r0, s390_r13, ins->inst_destbasereg, 0);
2489                         }
2490                 }
2491                         break;
2492                 case OP_STOREI2_MEMBASE_IMM: {
2493                         s390_lhi (code, s390_r0, ins->inst_imm);
2494                         if (s390_is_uimm12(ins->inst_offset)) {
2495                                 s390_sth (code, s390_r0, 0, ins->inst_destbasereg, ins->inst_offset);
2496                         } else {
2497                                 s390_basr (code, s390_r13, 0);
2498                                 s390_j    (code, 4);
2499                                 s390_word (code, ins->inst_offset);
2500                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2501                                 s390_sth  (code, s390_r0, s390_r13, ins->inst_destbasereg, 0);
2502                         }
2503                 }
2504                         break;
2505                 case OP_STORE_MEMBASE_IMM:
2506                 case OP_STOREI4_MEMBASE_IMM: {
2507                         if (s390_is_imm16(ins->inst_imm)) {
2508                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2509                         } else {
2510                                 s390_basr (code, s390_r13, 0);
2511                                 s390_j    (code, 4);
2512                                 s390_word (code, ins->inst_imm);
2513                                 s390_l    (code, s390_r0, 0, s390_r13, 4);
2514                         }
2515                         if (s390_is_uimm12(ins->inst_offset)) {
2516                                 s390_st  (code, s390_r0, 0, ins->inst_destbasereg, ins->inst_offset);
2517                         } else {
2518                                 s390_basr (code, s390_r13, 0);
2519                                 s390_j    (code, 4);
2520                                 s390_word (code, ins->inst_offset);
2521                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2522                                 s390_st   (code, s390_r0, s390_r13, ins->inst_destbasereg, 0);
2523                         }
2524                 }
2525                         break;
2526                 case OP_STOREI1_MEMBASE_REG: {
2527                         if (s390_is_uimm12(ins->inst_offset)) {
2528                                 s390_stc  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
2529                         } else {
2530                                 s390_basr (code, s390_r13, 0);
2531                                 s390_j    (code, 4);
2532                                 s390_word (code, ins->inst_offset);
2533                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2534                                 s390_stc  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
2535                         }
2536                 }
2537                         break;
2538                 case OP_STOREI2_MEMBASE_REG: {
2539                         if (s390_is_uimm12(ins->inst_offset)) {
2540                                 s390_sth  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
2541                         } else {
2542                                 s390_basr (code, s390_r13, 0);
2543                                 s390_j    (code, 4);
2544                                 s390_word (code, ins->inst_offset);
2545                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2546                                 s390_sth  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
2547                         }
2548                 }
2549                         break;
2550                 case OP_STORE_MEMBASE_REG:
2551                 case OP_STOREI4_MEMBASE_REG: {
2552                         if (s390_is_uimm12(ins->inst_offset)) {
2553                                 s390_st   (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
2554                         } else {
2555                                 s390_basr (code, s390_r13, 0);
2556                                 s390_j    (code, 4);
2557                                 s390_word (code, ins->inst_offset);
2558                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2559                                 s390_st   (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
2560                         }
2561                 }
2562                         break;
2563                 case CEE_LDIND_I:
2564                 case CEE_LDIND_I4:
2565                 case CEE_LDIND_U4: {
2566                         s390_basr (code, s390_r13, 0);
2567                         s390_j    (code, 4);
2568                         s390_word (code, ins->inst_p0);
2569                         s390_l    (code, s390_r13, 0, s390_r13, 4);
2570                         s390_l    (code, ins->dreg, 0, s390_r13, 0);
2571                 }
2572                         break;
2573                 case OP_LOADU4_MEM:
2574                         g_assert_not_reached ();
2575                         break;
2576                 case OP_LOAD_MEMBASE:
2577                 case OP_LOADI4_MEMBASE:
2578                 case OP_LOADU4_MEMBASE: {
2579                         if (s390_is_uimm12(ins->inst_offset))
2580                                 s390_l    (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
2581                         else {
2582                                 if (s390_is_imm16(ins->inst_offset)) {
2583                                         s390_lhi (code, s390_r13, ins->inst_offset);
2584                                         s390_l   (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
2585                                 } else {
2586                                         s390_basr (code, s390_r13, 0);
2587                                         s390_j    (code, 4);
2588                                         s390_word (code, ins->inst_offset);
2589                                         s390_l    (code, s390_r13, 0, s390_r13, 4);
2590                                         s390_l    (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
2591                                 }
2592                         }
2593                 }
2594                         break;
2595                 case OP_LOADU1_MEMBASE: {
2596                         s390_lhi (code, s390_r0, 0);
2597                         if (s390_is_uimm12(ins->inst_offset))
2598                                 s390_ic   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
2599                         else {
2600                                 s390_basr (code, s390_r13, 0);
2601                                 s390_j    (code, 4);
2602                                 s390_word (code, ins->inst_offset);
2603                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2604                                 s390_ic   (code, s390_r0, s390_r13, ins->inst_basereg, 0);
2605                         }
2606                         s390_lr   (code, ins->dreg, s390_r0);
2607                 }
2608                         break;
2609                 case OP_LOADI1_MEMBASE: {
2610                         s390_lhi (code, s390_r0, 0);
2611                         if (s390_is_uimm12(ins->inst_offset))
2612                                 s390_ic   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
2613                         else {
2614                                 s390_basr (code, s390_r13, 0);
2615                                 s390_j    (code, 4);
2616                                 s390_word (code, ins->inst_offset);
2617                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2618                                 s390_ic   (code, s390_r0, s390_r13, ins->inst_basereg, 0);
2619                         }
2620                         s390_lhi  (code, s390_r13, 0x80);
2621                         s390_nr   (code, s390_r13, s390_r0);
2622                         s390_jz   (code, 5);
2623                         s390_lhi  (code, s390_r13, 0xff00);
2624                         s390_or   (code, s390_r0, s390_r13);
2625                         s390_lr   (code, ins->dreg, s390_r0);
2626                 }
2627                         break;
2628                 case OP_LOADU2_MEMBASE: {
2629                         s390_lhi (code, s390_r0, 0);
2630                         if (s390_is_uimm12(ins->inst_offset))
2631                                 s390_icm  (code, s390_r0, 3, 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_ar   (code, s390_r13, ins->inst_basereg);
2638                                 s390_icm  (code, s390_r0, 3, s390_r13, 0);
2639                         }
2640                         s390_lr  (code, ins->dreg, s390_r0);
2641                 }
2642                         break;
2643                 case OP_LOADI2_MEMBASE: {
2644                         s390_lhi (code, s390_r0, 0);
2645                         if (s390_is_uimm12(ins->inst_offset))
2646                                 s390_lh   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
2647                         else {
2648                                 s390_basr (code, s390_r13, 0);
2649                                 s390_j    (code, 4);
2650                                 s390_word (code, ins->inst_offset);
2651                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2652                                 s390_lh   (code, s390_r0, s390_r13, ins->inst_basereg, 0);
2653                         }
2654                         s390_lr  (code, ins->dreg, s390_r0);
2655                 }
2656                         break;
2657                 case CEE_CONV_I1: {
2658                         s390_lhi  (code, s390_r0, 0x80);
2659                         if (ins->dreg != ins->sreg1) {
2660                                 s390_lr   (code, ins->dreg, ins->sreg1);
2661                         }
2662                         s390_nr   (code, s390_r0, ins->sreg1);
2663                         s390_jz   (code, 7);
2664                         s390_lhi  (code, s390_r13, -1);
2665                         s390_sll  (code, s390_r13, 0, 8);
2666                         s390_or   (code, ins->dreg, s390_r13);
2667                 }
2668                         break;
2669                 case CEE_CONV_I2: {
2670                         s390_lhi  (code, s390_r0, 0x80);
2671                         s390_sll  (code, s390_r0, 0, 8);
2672                         if (ins->dreg != ins->sreg1) {
2673                                 s390_lr   (code, ins->dreg, ins->sreg1);
2674                         }
2675                         s390_nr   (code, s390_r0, ins->sreg1);
2676                         s390_jz   (code, 7);
2677                         s390_lhi  (code, s390_r13, -1);
2678                         s390_sll  (code, s390_r13, 0, 16);
2679                         s390_or   (code, ins->dreg, s390_r13);
2680                 }
2681                         break;
2682                 case CEE_CONV_U1: {
2683                         s390_lhi  (code, s390_r0, 0xff);
2684                         if (ins->dreg != ins->sreg1) {
2685                                 s390_lr   (code, ins->dreg, ins->sreg1);
2686                         }
2687                         s390_nr   (code, ins->dreg, s390_r0);
2688                 }
2689                         break;
2690                 case CEE_CONV_U2: {
2691                         s390_lhi  (code, s390_r0, -1);
2692                         s390_sll  (code, s390_r0, 0, 16);
2693                         s390_srl  (code, s390_r0, 0, 16);
2694                         if (ins->dreg != ins->sreg1) {
2695                                 s390_lr   (code, ins->dreg, ins->sreg1);
2696                         }
2697                         s390_nr   (code, ins->dreg, s390_r0);
2698                 }
2699                         break;
2700                 case OP_COMPARE: {
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, ins->sreg2);
2709                         else
2710                                 s390_cr   (code, ins->sreg1, ins->sreg2);
2711                 }
2712                         break;
2713                 case OP_COMPARE_IMM: {
2714                         if (s390_is_imm16 (ins->inst_imm)) {
2715                                 s390_lhi  (code, s390_r0, 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_clr  (code, ins->sreg1, s390_r0);
2724                                 else
2725                                         s390_cr   (code, ins->sreg1, s390_r0);
2726                         }
2727                         else {
2728                                 s390_basr (code, s390_r13, 0);
2729                                 s390_j    (code, 4);
2730                                 s390_word (code, ins->inst_imm);
2731                                 if ((ins->next) &&
2732                                     (((ins->next->opcode >= CEE_BNE_UN) &&
2733                                       (ins->next->opcode <= CEE_BLT_UN)) ||
2734                                      ((ins->next->opcode >= OP_COND_EXC_NE_UN) &&
2735                                       (ins->next->opcode <= OP_COND_EXC_LT_UN)) ||
2736                                      ((ins->next->opcode == OP_CLT_UN) ||
2737                                       (ins->next->opcode == OP_CGT_UN))))
2738                                         s390_cl   (code, ins->sreg1, 0, s390_r13, 4);
2739                                 else
2740                                         s390_c    (code, ins->sreg1, 0, s390_r13, 4);
2741                         }
2742                 }
2743                         break;
2744                 case CEE_BREAK: {
2745                         mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS, mono_arch_break);
2746                         s390_brasl (code, s390_r14, 0);
2747                 }
2748                         break;
2749                 case OP_ADDCC: {
2750                         CHECK_SRCDST_COM;
2751                         s390_alr  (code, ins->dreg, src2);
2752                 }
2753                         break;
2754                 case CEE_ADD: {
2755                         CHECK_SRCDST_COM;
2756                         s390_ar   (code, ins->dreg, src2);
2757                 }
2758                         break;
2759                 case OP_ADC: {
2760                         CHECK_SRCDST_COM;
2761                         s390_alcr (code, ins->dreg, src2);
2762                 }
2763                         break;
2764                 case OP_ADD_IMM: {
2765                         if (ins->dreg != ins->sreg1) {
2766                                 s390_lr   (code, ins->dreg, ins->sreg1);
2767                         }
2768                         if ((ins->next) &&
2769                             (ins->next->opcode == OP_ADC_IMM)) {
2770                                 s390_basr (code, s390_r13, 0);
2771                                 s390_j    (code, 4);
2772                                 s390_word (code, ins->inst_imm);
2773                                 s390_a (code, ins->dreg, 0, s390_r13, 4);
2774                         } else {
2775                                 if (s390_is_imm16 (ins->inst_imm)) {
2776                                         s390_ahi  (code, ins->dreg, ins->inst_imm);
2777                                 } else {
2778                                         s390_basr (code, s390_r13, 0);
2779                                         s390_j    (code, 4);
2780                                         s390_word (code, ins->inst_imm);
2781                                         s390_a (code, ins->dreg, 0, s390_r13, 4);
2782                                 }
2783                         }
2784                 }
2785                         break;
2786                 case OP_ADDCC_IMM: {
2787                         if ((ins->next) &&
2788                             (ins->next->opcode == OP_ADC_IMM)) {
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                         } else {
2797                                 if (s390_is_imm16 (ins->inst_imm)) {
2798                                         if (ins->dreg != ins->sreg1) {
2799                                                 s390_lr   (code, ins->dreg, ins->sreg1);
2800                                         }
2801                                         s390_lhi  (code, s390_r0, ins->inst_imm);
2802                                         s390_alcr (code, ins->dreg, s390_r0);
2803                                 } else {
2804                                         s390_basr (code, s390_r13, 0);
2805                                         s390_j    (code, 4);
2806                                         s390_word (code, ins->inst_imm);
2807                                         if (ins->dreg != ins->sreg1) {
2808                                                 s390_lr   (code, ins->dreg, ins->sreg1);
2809                                         }
2810                                         s390_al   (code, ins->dreg, 0, s390_r13, 4);
2811                                 }
2812                         }
2813                 }
2814                         break;
2815                 case OP_ADC_IMM: {
2816                         if (s390_is_imm16 (ins->inst_imm)) {
2817                                 if (ins->dreg != ins->sreg1) {
2818                                         s390_lr   (code, ins->dreg, ins->sreg1);
2819                                 }
2820                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2821                                 s390_alcr (code, ins->dreg, s390_r0);
2822                         } else {
2823                                 s390_basr (code, s390_r13, 0);
2824                                 s390_j    (code, 4);
2825                                 s390_word (code, ins->inst_imm);
2826                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2827                                 s390_alcr (code, ins->dreg, s390_r13);
2828                         }
2829                 }
2830                         break;
2831                 case CEE_ADD_OVF: {
2832                         CHECK_SRCDST_COM;
2833                         s390_ar   (code, ins->dreg, src2);
2834                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2835                 }
2836                         break;
2837                 case CEE_ADD_OVF_UN: {
2838                         CHECK_SRCDST_COM;
2839                         s390_alr  (code, ins->dreg, src2);
2840                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
2841                 }
2842                         break;
2843                 case OP_LADD: {
2844                         short int *o[1];
2845                         s390_alr  (code, s390_r0, ins->sreg1);
2846                         s390_jnc  (code, 4);
2847                         s390_ahi  (code, s390_r1, 1);
2848                         s390_ar   (code, s390_r1, ins->sreg2);
2849                         s390_lr   (code, ins->dreg, s390_r0);
2850                         s390_lr   (code, ins->dreg+1, s390_r1);
2851                 }
2852                         break;
2853                 case OP_LADD_OVF: {
2854                         short int *o[1];
2855                         s390_alr  (code, s390_r0, ins->sreg1);
2856                         s390_jnc  (code, 0); CODEPTR(code, o[0]);
2857                         s390_ahi  (code, s390_r1, 1);
2858                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2859                         PTRSLOT   (code, o[0]);
2860                         s390_ar   (code, s390_r1, ins->sreg2);
2861                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2862                         s390_lr   (code, ins->dreg, s390_r0);
2863                         s390_lr   (code, ins->dreg+1, s390_r1);
2864                 }
2865                         break;
2866                 case OP_LADD_OVF_UN: {
2867                         s390_alr  (code, s390_r0, ins->sreg1);
2868                         s390_alcr (code, s390_r1, ins->sreg2);
2869                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
2870                         s390_lr   (code, ins->dreg, s390_r0);
2871                         s390_lr   (code, ins->dreg+1, s390_r1);
2872                 }
2873                         break;
2874                 case OP_ADD_OVF_CARRY: {
2875                         CHECK_SRCDST_COM;
2876                         s390_lhi  (code, s390_r0, 0);
2877                         s390_lr   (code, s390_r1, s390_r0);
2878                         s390_alcr (code, s390_r0, s390_r1);
2879                         s390_ar   (code, ins->dreg, src2);
2880                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2881                         s390_ar   (code, ins->dreg, s390_r0);
2882                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2883                 }
2884                         break;
2885                 case OP_ADD_OVF_UN_CARRY: {
2886                         CHECK_SRCDST_COM;
2887                         s390_alcr (code, ins->dreg, src2);
2888                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
2889                 }
2890                         break;
2891                 case OP_SUBCC: {
2892                         CHECK_SRCDST_NCOM;
2893                         s390_slr (code, ins->dreg, src2);
2894                 }
2895                         break;
2896                 case CEE_SUB: {
2897                         CHECK_SRCDST_NCOM;
2898                         s390_sr   (code, ins->dreg, src2);
2899                 }
2900                         break;
2901                 case OP_SBB: {
2902                         CHECK_SRCDST_NCOM;
2903                         s390_slbr (code, ins->dreg, src2);
2904                 }
2905                         break;
2906                 case OP_SUBCC_IMM: {
2907                         if (s390_is_imm16 (-ins->inst_imm)) {
2908                                 if (ins->dreg != ins->sreg1) {
2909                                         s390_lr   (code, ins->dreg, ins->sreg1);
2910                                 }
2911                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2912                                 s390_slr  (code, ins->dreg, s390_r0);
2913                         } else {
2914                                 s390_basr (code, s390_r13, 0);
2915                                 s390_j    (code, 4);
2916                                 s390_word (code, ins->inst_imm);
2917                                 if (ins->dreg != ins->sreg1) {
2918                                         s390_lr   (code, ins->dreg, ins->sreg1);
2919                                 }
2920                                 s390_sl   (code, ins->dreg, 0, s390_r13, 4);
2921                         }
2922                 }
2923                         break;
2924                 case OP_SUB_IMM: {
2925                         if (s390_is_imm16 (-ins->inst_imm)) {
2926                                 if (ins->dreg != ins->sreg1) {
2927                                         s390_lr   (code, ins->dreg, ins->sreg1);
2928                                 }
2929                                 s390_ahi  (code, ins->dreg, -ins->inst_imm);
2930                         } else {
2931                                 s390_basr (code, s390_r13, 0);
2932                                 s390_j    (code, 4);
2933                                 s390_word (code, ins->inst_imm);
2934                                 if (ins->dreg != ins->sreg1) {
2935                                         s390_lr   (code, ins->dreg, ins->sreg1);
2936                                 }
2937                                 s390_s    (code, ins->dreg, 0, s390_r13, 4);
2938                         }
2939                 }
2940                         break;
2941                 case OP_SBB_IMM: {
2942                         if (ins->dreg != ins->sreg1) {
2943                                 s390_lr    (code, ins->dreg, ins->sreg1);
2944                         }
2945                         if (s390_is_imm16 (-ins->inst_imm)) {
2946                                 s390_lhi   (code, s390_r0, ins->inst_imm);
2947                                 s390_slbr  (code, ins->dreg, s390_r0);
2948                         } else {
2949                                 s390_basr (code, s390_r13, 0);
2950                                 s390_j    (code, 4);
2951                                 s390_word (code, ins->inst_imm);
2952                                 s390_slb  (code, ins->dreg, 0, s390_r13, 4);
2953                         }
2954                 }
2955                         break;
2956                 case CEE_SUB_OVF: {
2957                         CHECK_SRCDST_NCOM;
2958                         s390_sr   (code, ins->dreg, src2);
2959                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2960                 }
2961                         break;
2962                 case CEE_SUB_OVF_UN: {
2963                         CHECK_SRCDST_NCOM;
2964                         s390_slr  (code, ins->dreg, src2);
2965                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
2966                 }
2967                         break;
2968                 case OP_LSUB: {
2969                         s390_lr   (code, s390_r14, ins->sreg2);
2970                         s390_slr  (code, s390_r0, ins->sreg1);
2971                         s390_jnl  (code, 4);
2972                         s390_ahi  (code, s390_r14, 1);
2973                         s390_sr   (code, s390_r1, s390_r14);
2974                         s390_lr   (code, ins->dreg, s390_r0);
2975                         s390_lr   (code, ins->dreg+1, s390_r1);
2976                 }
2977                         break;
2978                 case OP_LSUB_OVF: {
2979                         short int *o[1];
2980                         s390_lr   (code, s390_r14, ins->sreg2);
2981                         s390_slr  (code, s390_r0, ins->sreg1);
2982                         s390_jnl  (code, 0); CODEPTR(code, o[0]);
2983                         s390_ahi  (code, s390_r14, 1);
2984                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2985                         PTRSLOT   (code, o[0]);
2986                         s390_sr   (code, s390_r1, s390_r14);
2987                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2988                         s390_lr   (code, ins->dreg, s390_r0);
2989                         s390_lr   (code, ins->dreg+1, s390_r1);
2990                 }
2991                         break;
2992                 case OP_LSUB_OVF_UN: {
2993                         s390_slr  (code, s390_r0, ins->sreg1);
2994                         s390_slbr (code, s390_r1, ins->sreg2);
2995                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, "OverflowException");
2996                         s390_lr   (code, ins->dreg, s390_r0);
2997                         s390_lr   (code, ins->dreg+1, s390_r1);
2998                 }
2999                         break;
3000                 case OP_SUB_OVF_CARRY: {
3001                         CHECK_SRCDST_NCOM;
3002                         s390_lhi  (code, s390_r0, 0);
3003                         s390_lr   (code, s390_r1, s390_r0);
3004                         s390_slbr (code, s390_r0, s390_r1);
3005                         s390_sr   (code, ins->dreg, src2);
3006                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3007                         s390_ar   (code, ins->dreg, s390_r0);
3008                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3009                 }
3010                         break;
3011                 case OP_SUB_OVF_UN_CARRY: {
3012                         CHECK_SRCDST_NCOM;
3013                         s390_slbr (code, ins->dreg, src2);
3014                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
3015                 }
3016                         break;
3017                 case CEE_AND: {
3018                         if (ins->sreg1 == ins->dreg) {
3019                                 s390_nr   (code, ins->dreg, ins->sreg2);
3020                         }
3021                         else {
3022                                 if (ins->sreg2 == ins->dreg) {
3023                                         s390_nr  (code, ins->dreg, ins->sreg1);
3024                                 }
3025                                 else {
3026                                         s390_lr  (code, ins->dreg, ins->sreg1);
3027                                         s390_nr  (code, ins->dreg, ins->sreg2);
3028                                 }
3029                         }
3030                 }
3031                         break;
3032                 case OP_AND_IMM: {
3033                         if (s390_is_imm16 (ins->inst_imm)) {
3034                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3035                                 if (ins->dreg != ins->sreg1) {
3036                                         s390_lr   (code, ins->dreg, ins->sreg1);
3037                                 }
3038                                 s390_nr   (code, ins->dreg, s390_r0);
3039                         } else {
3040                                 s390_basr (code, s390_r13, 0);
3041                                 s390_j    (code, 4);
3042                                 s390_word (code, ins->inst_imm);
3043                                 if (ins->dreg != ins->sreg1) {
3044                                         s390_lr   (code, ins->dreg, ins->sreg1);
3045                                 }
3046                                 s390_n    (code, ins->dreg, 0, s390_r13, 4);
3047                         }
3048                 }
3049                         break;
3050                 case CEE_DIV: {
3051                         s390_lr   (code, s390_r0, ins->sreg1);
3052                         s390_srda (code, s390_r0, 0, 32);
3053                         s390_dr   (code, s390_r0, ins->sreg2);
3054                         s390_lr   (code, ins->dreg, s390_r1);
3055                 }
3056                         break;
3057                 case CEE_DIV_UN: {
3058                         s390_lr   (code, s390_r0, ins->sreg1);
3059                         s390_srdl (code, s390_r0, 0, 32);
3060                         s390_dlr  (code, s390_r0, ins->sreg2);
3061                         s390_lr   (code, ins->dreg, s390_r1);
3062                 }
3063                         break;
3064                 case OP_DIV_IMM: {
3065                         if (s390_is_imm16 (ins->inst_imm)) {
3066                                 s390_lhi  (code, s390_r13, ins->inst_imm);
3067                                 s390_lr   (code, s390_r0, ins->sreg1);
3068                         } else {
3069                                 s390_basr (code, s390_r13, 0);
3070                                 s390_j    (code, 4);
3071                                 s390_word (code, ins->inst_imm);
3072                                 s390_lr   (code, s390_r0, ins->sreg1);
3073                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3074                         }
3075                         s390_srda (code, s390_r0, 0, 32);
3076                         s390_dr   (code, s390_r0, s390_r13);
3077                         s390_lr   (code, ins->dreg, s390_r1);
3078                 }
3079                         break;
3080                 case CEE_REM: {
3081                         s390_lr   (code, s390_r0, ins->sreg1);
3082                         s390_srda (code, s390_r0, 0, 32);
3083                         s390_dr   (code, s390_r0, ins->sreg2);
3084                         s390_lr   (code, ins->dreg, s390_r0);
3085                         break;
3086                 case CEE_REM_UN:
3087                         s390_lr   (code, s390_r0, ins->sreg1);
3088                         s390_srdl (code, s390_r0, 0, 32);
3089                         s390_dlr  (code, s390_r0, ins->sreg2);
3090                         s390_lr   (code, ins->dreg, s390_r0);
3091                 }
3092                         break;
3093                 case OP_REM_IMM: {
3094                         if (s390_is_imm16 (ins->inst_imm)) {
3095                                 s390_lhi  (code, s390_r13, ins->inst_imm);
3096                                 s390_lr   (code, s390_r0, ins->sreg1);
3097                         } else {
3098                                 s390_basr (code, s390_r13, 0);
3099                                 s390_j    (code, 4);
3100                                 s390_word (code, ins->inst_imm);
3101                                 s390_lr   (code, s390_r0, ins->sreg1);
3102                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3103                         }
3104                         s390_srda (code, s390_r0, 0, 32);
3105                         s390_dr   (code, s390_r0, s390_r13);
3106                         s390_lr   (code, ins->dreg, s390_r0);
3107                 }
3108                         break;
3109                 case CEE_OR: {
3110                         if (ins->sreg1 == ins->dreg) {
3111                                 s390_or   (code, ins->dreg, ins->sreg2);
3112                         }
3113                         else {
3114                                 if (ins->sreg2 == ins->dreg) {
3115                                         s390_or  (code, ins->dreg, ins->sreg1);
3116                                 }
3117                                 else {
3118                                         s390_lr  (code, ins->dreg, ins->sreg1);
3119                                         s390_or  (code, ins->dreg, ins->sreg2);
3120                                 }
3121                         }
3122                 }
3123                         break;
3124                 case OP_OR_IMM: {
3125                         if (s390_is_imm16 (ins->inst_imm)) {
3126                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3127                                 if (ins->dreg != ins->sreg1) {
3128                                         s390_lr   (code, ins->dreg, ins->sreg1);
3129                                 }
3130                                 s390_or   (code, ins->dreg, s390_r0);
3131                         } else {
3132                                 s390_basr (code, s390_r13, 0);
3133                                 s390_j    (code, 4);
3134                                 s390_word (code, ins->inst_imm);
3135                                 if (ins->dreg != ins->sreg1) {
3136                                         s390_lr   (code, ins->dreg, ins->sreg1);
3137                                 }
3138                                 s390_o    (code, ins->dreg, 0, s390_r13, 4);
3139                         }
3140                 }
3141                         break;
3142                 case CEE_XOR: {
3143                         if (ins->sreg1 == ins->dreg) {
3144                                 s390_xr   (code, ins->dreg, ins->sreg2);
3145                         }
3146                         else {
3147                                 if (ins->sreg2 == ins->dreg) {
3148                                         s390_xr  (code, ins->dreg, ins->sreg1);
3149                                 }
3150                                 else {
3151                                         s390_lr  (code, ins->dreg, ins->sreg1);
3152                                         s390_xr  (code, ins->dreg, ins->sreg2);
3153                                 }
3154                         }
3155                 }
3156                         break;
3157                 case OP_XOR_IMM: {
3158                         if (s390_is_imm16 (ins->inst_imm)) {
3159                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3160                                 if (ins->dreg != ins->sreg1) {
3161                                         s390_lr   (code, ins->dreg, ins->sreg1);
3162                                 }
3163                                 s390_xr   (code, ins->dreg, s390_r0);
3164                         } else {
3165                                 s390_basr (code, s390_r13, 0);
3166                                 s390_j    (code, 4);
3167                                 s390_word (code, ins->inst_imm);
3168                                 if (ins->dreg != ins->sreg1) {
3169                                         s390_lr   (code, ins->dreg, ins->sreg1);
3170                                 }
3171                                 s390_x    (code, ins->dreg, 0, s390_r13, 4);
3172                         }
3173                 }
3174                         break;
3175                 case CEE_SHL: {
3176                         CHECK_SRCDST_NCOM;
3177                         s390_sll  (code, ins->dreg, src2, 0);
3178                 }
3179                         break;
3180                 case OP_SHL_IMM: {
3181                         if (ins->sreg1 != ins->dreg) {
3182                                 s390_lr   (code, ins->dreg, ins->sreg1);
3183                         }
3184                         s390_sll  (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3185                 }
3186                         break;
3187                 case CEE_SHR: {
3188                         CHECK_SRCDST_NCOM;
3189                         s390_sra  (code, ins->dreg, src2, 0);
3190                 }
3191                         break;
3192                 case OP_SHR_IMM: {
3193                         if (ins->sreg1 != ins->dreg) {
3194                                 s390_lr   (code, ins->dreg, ins->sreg1);
3195                         }
3196                         s390_sra  (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3197                 }
3198                         break;
3199                 case OP_SHR_UN_IMM: {
3200                         if (ins->sreg1 != ins->dreg) {
3201                                 s390_lr   (code, ins->dreg, ins->sreg1);
3202                         }
3203                         s390_srl  (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3204                 }
3205                         break;
3206                 case CEE_SHR_UN: {
3207                         CHECK_SRCDST_NCOM;
3208                         s390_srl  (code, ins->dreg, src2, 0);
3209                 }
3210                         break;
3211                 case CEE_NOT: {
3212                         if (ins->sreg1 != ins->dreg) {
3213                                 s390_lr   (code, ins->dreg, ins->sreg1);
3214                         }
3215                         s390_lhi (code, s390_r0, -1);
3216                         s390_xr  (code, ins->dreg, s390_r0);
3217                 }
3218                         break;
3219                 case CEE_NEG: {
3220                         s390_lcr (code, ins->dreg, ins->sreg1);
3221                 }
3222                         break;
3223                 case CEE_MUL: {
3224                         if (ins->sreg1 == ins->dreg) {
3225                                 s390_msr  (code, ins->dreg, ins->sreg2);
3226                         }
3227                         else {
3228                                 if (ins->sreg2 == ins->dreg) {
3229                                         s390_msr (code, ins->dreg, ins->sreg1);
3230                                 }
3231                                 else {
3232                                         s390_lr  (code, ins->dreg, ins->sreg1);
3233                                         s390_msr (code, ins->dreg, ins->sreg2);
3234                                 }
3235                         }
3236                 }
3237                         break;
3238                 case OP_MUL_IMM: {
3239                         if (s390_is_imm16 (ins->inst_imm)) {
3240                                 s390_lhi  (code, s390_r13, ins->inst_imm);
3241                         } else {
3242                                 s390_basr (code, s390_r13, 0);
3243                                 s390_j    (code, 4);
3244                                 s390_word (code, ins->inst_imm);
3245 //                              if (ins->dreg != ins->sreg1) {
3246 //                                      s390_lr   (code, ins->dreg, ins->sreg1);
3247 //                              }
3248                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3249                         }
3250                         if (ins->dreg != ins->sreg1) {
3251                                 s390_lr   (code, ins->dreg, ins->sreg1);
3252                         }
3253                         s390_msr  (code, ins->dreg, s390_r13);
3254                 }
3255                         break;
3256                 case CEE_MUL_OVF: {
3257                         short int *o[2];
3258                         s390_ltr  (code, s390_r1, ins->sreg1);
3259                         s390_jz   (code, 0); CODEPTR(code, o[0]);
3260                         s390_ltr  (code, s390_r0, ins->sreg2);
3261                         s390_jnz  (code, 6);
3262                         s390_lhi  (code, s390_r1, 0);
3263                         s390_j    (code, 0); CODEPTR(code, o[1]);
3264                         s390_xr   (code, s390_r0, s390_r1);
3265                         s390_msr  (code, s390_r1, ins->sreg2);
3266                         s390_xr   (code, s390_r0, s390_r1);
3267                         s390_srl  (code, s390_r0, 0, 31);
3268                         s390_ltr  (code, s390_r0, s390_r0);
3269                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3270                         PTRSLOT   (code, o[0]);
3271                         PTRSLOT   (code, o[1]);
3272                         s390_lr   (code, ins->dreg, s390_r1);
3273                 }
3274                         break;
3275                 case CEE_MUL_OVF_UN: {
3276                         s390_lhi  (code, s390_r0, 0);
3277                         s390_lr   (code, s390_r1, ins->sreg1);
3278                         s390_mlr  (code, s390_r0, ins->sreg2);
3279                         s390_ltr  (code, s390_r0, s390_r0);
3280                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3281                         s390_lr   (code, ins->dreg, s390_r1);
3282                 }
3283                         break;
3284                 case OP_LMUL: {
3285                         s390_l    (code, s390_r0, 0, ins->sreg1, 4);
3286                         s390_srda (code, s390_r0, 0, 32);
3287                         s390_m    (code, s390_r0, 0, ins->sreg2, 4);
3288                         s390_l    (code, s390_r0, 0, ins->sreg1, 4);
3289                         s390_srl  (code, s390_r0, 0, 31);
3290                         s390_a    (code, s390_r0, 0, ins->sreg1, 0);
3291                         s390_l    (code, s390_r13, 0, ins->sreg2, 0);
3292                         s390_srl  (code, s390_r13, 0, 31);
3293                         s390_ms   (code, s390_r13, 0, ins->sreg1, 4);
3294                         s390_ar   (code, s390_r0, s390_r13);
3295                         s390_st   (code, s390_r0, 0, ins->dreg, 0);
3296                         s390_st   (code, s390_r1, 0, ins->dreg, 4);
3297                 }
3298                         break;
3299                 case OP_ICONST:
3300                 case OP_SETREGIMM: {
3301                         if (s390_is_imm16(ins->inst_c0)) {
3302                                 s390_lhi  (code, ins->dreg, ins->inst_c0);
3303                         } else {
3304                                 s390_basr (code, s390_r13, 0);
3305                                 s390_j    (code, 4);
3306                                 s390_word (code, ins->inst_c0);
3307                                 s390_l    (code, ins->dreg, 0, s390_r13, 4);
3308                         }
3309                 }
3310                         break;
3311                 case OP_AOTCONST: {
3312                         s390_basr (code, s390_r13, 0);
3313                         s390_j    (code, 4);
3314                         mono_add_patch_info (cfg, code - cfg->native_code,
3315                                 (MonoJumpInfoType)ins->inst_i1, ins->inst_p0);
3316                         s390_word (code, 0);
3317                         s390_l    (code,ins->dreg, 0, s390_r13, 4);
3318                 }
3319                         break;
3320                 case CEE_CONV_I4:
3321                 case CEE_CONV_U4:
3322                 case OP_MOVE:
3323                 case OP_SETREG: {
3324                         if (ins->dreg != ins->sreg1) {
3325                                 s390_lr (code, ins->dreg, ins->sreg1);
3326                         }
3327                 }
3328                         break;
3329                 case OP_SETLRET: {
3330                         int saved = ins->sreg1;
3331                         if (ins->sreg1 == s390_r2) {
3332                                 s390_lr (code, s390_r0, ins->sreg1);
3333                                 saved = s390_r0;
3334                         }
3335                         if (ins->sreg2 != s390_r2)
3336                                 s390_lr (code, s390_r2, ins->sreg2);
3337                         if (saved != s390_r3)
3338                                 s390_lr (code, s390_r3, saved);
3339                         break;
3340                 }
3341                 case OP_SETFREG:
3342                 case OP_FMOVE: {
3343                         if (ins->dreg != ins->sreg1) {
3344                                 s390_ldr   (code, ins->dreg, ins->sreg1);
3345                         }
3346                 }
3347                         break;
3348                 case OP_S390_SETF4RET: {
3349                         s390_ledbr (code, ins->dreg, ins->sreg1);
3350                 }
3351                         break;
3352                 case OP_TLS_GET: {
3353                         if (s390_is_imm16 (ins->inst_offset)) {
3354                                 s390_lhi (code, s390_r13, ins->inst_offset);
3355                         } else {
3356                                 s390_bras (code, s390_r13, 0);
3357                                 s390_j    (code, 4);
3358                                 s390_word (code, ins->inst_offset);
3359                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3360                         }
3361                         s390_ear (code, s390_r1, 0);
3362                         s390_l   (code, ins->dreg, s390_r13, s390_r1, 0);
3363                 }
3364                         break;
3365                 case OP_FCONV_TO_R4: {
3366                         NOT_IMPLEMENTED("OP_FCONV_TO_R4");
3367                         if ((ins->next) &&
3368                              (ins->next->opcode != OP_FMOVE) &&
3369                              (ins->next->opcode != OP_STORER4_MEMBASE_REG))
3370                                 s390_ledbr (code, ins->dreg, ins->sreg1);
3371                 }
3372                         break;
3373                 case CEE_JMP: {
3374                         if (cfg->method->save_lmf)
3375                                 restoreLMF(code, cfg->frame_reg, cfg->stack_usage);
3376
3377                         if (cfg->flags & MONO_CFG_HAS_TAIL) {
3378                                 code = emit_load_volatile_registers(code, cfg);
3379                         }
3380
3381                         code = backUpStackPtr(cfg, code, STK_BASE);
3382                         s390_l   (code, s390_r14, 0, STK_BASE, S390_RET_ADDR_OFFSET);
3383                         mono_add_patch_info (cfg, code - cfg->native_code,
3384                                              MONO_PATCH_INFO_METHOD_JUMP,
3385                                              ins->inst_p0);
3386                         s390_jcl (code, S390_CC_UN, 0);
3387                 }
3388                         break;
3389                 case OP_CHECK_THIS: {
3390                         /* ensure ins->sreg1 is not NULL */
3391                         s390_icm (code, s390_r0, 15, ins->sreg1, 0);
3392                 }
3393                         break;
3394                 case OP_ARGLIST: {
3395                         int offset = cfg->sig_cookie + cfg->stack_usage;
3396
3397                         if (s390_is_imm16 (offset))
3398                                 s390_lhi  (code, s390_r0, offset);
3399                         else {
3400                                 s390_basr (code, s390_r13, 0);
3401                                 s390_j    (code, 4);
3402                                 s390_word (code, offset);
3403                                 s390_l    (code, s390_r0, 0, s390_r13, 0);
3404                         }
3405                         s390_ar   (code, s390_r0, cfg->frame_reg);
3406                         s390_st   (code, s390_r0, 0, ins->sreg1, 0);
3407                 }
3408                         break;
3409                 case OP_FCALL: {
3410                         call = (MonoCallInst*)ins;
3411                         if (ins->flags & MONO_INST_HAS_METHOD)
3412                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_METHOD,
3413                                                      call->method);
3414                         else
3415                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS,
3416                                                      call->fptr);
3417                         s390_brasl (code, s390_r14, 0);
3418                         if (call->signature->ret->type == MONO_TYPE_R4)
3419                                 s390_ldebr (code, s390_f0, s390_f0);
3420                 }
3421                         break;
3422                 case OP_LCALL:
3423                 case OP_VCALL:
3424                 case OP_VOIDCALL:
3425                 case CEE_CALL: {
3426                         call = (MonoCallInst*)ins;
3427                         if (ins->flags & MONO_INST_HAS_METHOD)
3428                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_METHOD, call->method);
3429                         else
3430                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS, call->fptr);
3431                         s390_brasl (code, s390_r14, 0);
3432                 }
3433                         break;
3434                 case OP_FCALL_REG: {
3435                         call = (MonoCallInst*)ins;
3436                         s390_lr   (code, s390_r1, ins->sreg1);
3437                         s390_basr (code, s390_r14, s390_r1);
3438                         if (call->signature->ret->type == MONO_TYPE_R4)
3439                                 s390_ldebr (code, s390_f0, s390_f0);
3440                 }
3441                         break;
3442                 case OP_LCALL_REG:
3443                 case OP_VCALL_REG:
3444                 case OP_VOIDCALL_REG:
3445                 case OP_CALL_REG: {
3446                         s390_lr   (code, s390_r1, ins->sreg1);
3447                         s390_basr (code, s390_r14, s390_r1);
3448                 }
3449                         break;
3450                 case OP_FCALL_MEMBASE: {
3451                         call = (MonoCallInst*)ins;
3452                         s390_l    (code, s390_r1, 0, ins->sreg1, ins->inst_offset);
3453                         s390_basr (code, s390_r14, s390_r1);
3454                         if (call->signature->ret->type == MONO_TYPE_R4)
3455                                 s390_ldebr (code, s390_f0, s390_f0);
3456                 }
3457                         break;
3458                 case OP_LCALL_MEMBASE:
3459                 case OP_VCALL_MEMBASE:
3460                 case OP_VOIDCALL_MEMBASE:
3461                 case OP_CALL_MEMBASE: {
3462                         s390_l    (code, s390_r1, 0, ins->sreg1, ins->inst_offset);
3463                         s390_basr (code, s390_r14, s390_r1);
3464                 }
3465                         break;
3466                 case OP_OUTARG:
3467                         g_assert_not_reached ();
3468                         break;
3469                 case OP_LOCALLOC: {
3470                         /*------------------------------------------*/
3471                         /* To allocate space on the stack we have   */
3472                         /* to allow room for parameters passed in   */
3473                         /* calls, the backchain pointer and round   */
3474                         /* it to our stack alignment requirements   */
3475                         /*------------------------------------------*/
3476                         int alloca_skip = S390_MINIMAL_STACK_SIZE + cfg->param_area;
3477                         int area_offset = S390_ALIGN(alloca_skip, S390_STACK_ALIGNMENT);
3478                         s390_lr   (code, s390_r1, ins->sreg1);
3479                         if (ins->flags & MONO_INST_INIT)
3480                                 s390_lr   (code, s390_r0, ins->sreg1);
3481                         s390_ahi  (code, s390_r1, 14);
3482                         s390_srl  (code, s390_r1, 0, 3);
3483                         s390_sll  (code, s390_r1, 0, 3);
3484                         if (cfg->method->save_lmf) {
3485                                 /*----------------------------------*/
3486                                 /* we have to adjust lmf ebp value  */
3487                                 /*----------------------------------*/
3488                                 int lmfOffset = cfg->stack_usage - sizeof(MonoLMF);
3489
3490                                 s390_lr (code, s390_r13, cfg->frame_reg);
3491                                 if (s390_is_uimm16(lmfOffset))
3492                                         s390_ahi   (code, s390_r13, lmfOffset);
3493                                 else {
3494                                         s390_basr (code, s390_r14, 0);
3495                                         s390_j    (code, 4);
3496                                         s390_word (code, lmfOffset);
3497                                         s390_a    (code, s390_r13, 0, s390_r14, 4);
3498                                 }
3499                                 s390_lr (code, s390_r14, STK_BASE);
3500                                 s390_sr (code, s390_r14, s390_r1);
3501                                 s390_st (code, s390_r14, 0, s390_r13,
3502                                          G_STRUCT_OFFSET(MonoLMF, ebp));
3503                         }
3504                         s390_l    (code, s390_r13, 0, STK_BASE, 0);
3505                         s390_sr   (code, STK_BASE, s390_r1);
3506                         s390_st   (code, s390_r13, 0, STK_BASE, 0);
3507                         s390_la   (code, ins->dreg, 0, STK_BASE, area_offset);
3508                         s390_srl  (code, ins->dreg, 0, 3);
3509                         s390_sll  (code, ins->dreg, 0, 3);
3510                         if (ins->flags & MONO_INST_INIT) {
3511                                 s390_lr   (code, s390_r1, s390_r0);
3512                                 s390_lr   (code, s390_r0, ins->dreg);
3513                                 s390_lr   (code, s390_r14, s390_r12);
3514                                 s390_lhi  (code, s390_r13, 0);
3515                                 s390_mvcle(code, s390_r0, s390_r12, 0, 0);
3516                                 s390_jo   (code, -2);
3517                                 s390_lr   (code, s390_r12, s390_r14);
3518                         }
3519                 }
3520                         break;
3521                 case CEE_RET: {
3522                         s390_br  (code, s390_r14);
3523                 }
3524                         break;
3525                 case CEE_THROW: {
3526                         s390_lr (code, s390_r2, ins->sreg1);
3527                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD,
3528                                              (gpointer)"mono_arch_throw_exception");
3529                         s390_brasl (code, s390_r14, 0);
3530                 }
3531                         break;
3532                 case OP_RETHROW: {
3533                         s390_lr (code, s390_r2, ins->sreg1);
3534                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD,
3535                                              (gpointer)"mono_arch_rethrow_exception");
3536                         s390_brasl (code, s390_r14, 0);
3537                 }
3538                         break;
3539                 case OP_START_HANDLER: {
3540                         if (s390_is_uimm12 (ins->inst_left->inst_offset)) {
3541                                 s390_st   (code, s390_r14, 0,
3542                                            ins->inst_left->inst_basereg,
3543                                            ins->inst_left->inst_offset);
3544                         } else {
3545                                 s390_basr (code, s390_r13, 0);
3546                                 s390_j    (code, 4);
3547                                 s390_word (code, ins->inst_left->inst_offset);
3548                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3549                                 s390_st   (code, s390_r14, s390_r13,
3550                                            ins->inst_left->inst_basereg, 0);
3551                         }
3552                 }
3553                         break;
3554                 case OP_ENDFILTER: {
3555                         if (ins->sreg1 != s390_r2)
3556                                 s390_lr (code, s390_r2, ins->sreg1);
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 CEE_ENDFINALLY: {
3572                         if (s390_is_uimm12 (ins->inst_left->inst_offset)) {
3573                                 s390_l  (code, s390_r14, 0, ins->inst_left->inst_basereg,
3574                                          ins->inst_left->inst_offset);
3575                         } else {
3576                                 s390_basr (code, s390_r13, 0);
3577                                 s390_j    (code, 4);
3578                                 s390_word (code, ins->inst_left->inst_offset);
3579                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3580                                 s390_l    (code, s390_r14, s390_r13,
3581                                            ins->inst_left->inst_basereg, 0);
3582                         }
3583                         s390_br  (code, s390_r14);
3584                 }
3585                         break;
3586                 case OP_CALL_HANDLER: {
3587                         mono_add_patch_info (cfg, code-cfg->native_code,
3588                                              MONO_PATCH_INFO_BB, ins->inst_target_bb);
3589                         s390_brasl (code, s390_r14, 0);
3590                 }
3591                         break;
3592                 case OP_LABEL: {
3593                         ins->inst_c0 = code - cfg->native_code;
3594                 }
3595                         break;
3596                 case CEE_BR:
3597                         EMIT_UNCOND_BRANCH(ins);
3598                         break;
3599                 case OP_BR_REG: {
3600                         s390_br  (code, ins->sreg1);
3601                 }
3602                         break;
3603                 case OP_CEQ: {
3604                         s390_lhi (code, ins->dreg, 1);
3605                         s390_jz  (code, 4);
3606                         s390_lhi (code, ins->dreg, 0);
3607                 }
3608                         break;
3609                 case OP_CLT: {
3610                         s390_lhi (code, ins->dreg, 1);
3611                         s390_jl  (code, 4);
3612                         s390_lhi (code, ins->dreg, 0);
3613                 }
3614                         break;
3615                 case OP_CLT_UN: {
3616                         s390_lhi (code, ins->dreg, 1);
3617                         s390_jlo (code, 4);
3618                         s390_lhi (code, ins->dreg, 0);
3619                 }
3620                         break;
3621                 case OP_CGT: {
3622                         s390_lhi (code, ins->dreg, 1);
3623                         s390_jh  (code, 4);
3624                         s390_lhi (code, ins->dreg, 0);
3625                 }
3626                         break;
3627                 case OP_CGT_UN: {
3628                         s390_lhi (code, ins->dreg, 1);
3629                         s390_jho (code, 4);
3630                         s390_lhi (code, ins->dreg, 0);
3631                 }
3632                         break;
3633                 case OP_COND_EXC_EQ:
3634                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_EQ, ins->inst_p1);
3635                         break;
3636                 case OP_COND_EXC_NE_UN:
3637                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NE, ins->inst_p1);
3638                         break;
3639                 case OP_COND_EXC_LT:
3640                 case OP_COND_EXC_LT_UN:
3641                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, ins->inst_p1);
3642                         break;
3643                 case OP_COND_EXC_GT:
3644                 case OP_COND_EXC_GT_UN:
3645                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GT, ins->inst_p1);
3646                         break;
3647                 case OP_COND_EXC_GE:
3648                 case OP_COND_EXC_GE_UN:
3649                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GE, ins->inst_p1);
3650                         break;
3651                 case OP_COND_EXC_LE:
3652                 case OP_COND_EXC_LE_UN:
3653                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LE, ins->inst_p1);
3654                         break;
3655                 case OP_COND_EXC_OV:
3656                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, ins->inst_p1);
3657                         break;
3658                 case OP_COND_EXC_NO:
3659                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NO, ins->inst_p1);
3660                         break;
3661                 case OP_COND_EXC_C:
3662                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, ins->inst_p1);
3663                         break;
3664                 case OP_COND_EXC_NC:
3665                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, ins->inst_p1);
3666                         break;
3667                 case CEE_BEQ:
3668                         EMIT_COND_BRANCH (ins, S390_CC_EQ);
3669                         break;
3670                 case CEE_BNE_UN:
3671                         EMIT_COND_BRANCH (ins, S390_CC_NE);
3672                         break;
3673                 case CEE_BLT:
3674                 case CEE_BLT_UN:
3675                         EMIT_COND_BRANCH (ins, S390_CC_LT);
3676                         break;
3677                 case CEE_BGT:
3678                 case CEE_BGT_UN:
3679                         EMIT_COND_BRANCH (ins, S390_CC_GT);
3680                         break;
3681                 case CEE_BGE:
3682                 case CEE_BGE_UN:
3683                         EMIT_COND_BRANCH (ins, S390_CC_GE);
3684                         break;
3685                 case CEE_BLE:
3686                 case CEE_BLE_UN:
3687                         EMIT_COND_BRANCH (ins, S390_CC_LE);
3688                         break;
3689
3690                 /* floating point opcodes */
3691                 case OP_R8CONST: {
3692                         if (*((float *) ins->inst_p0) == 0) {
3693                                 s390_lzdr (code, ins->dreg);
3694                         } else {
3695                                 s390_basr  (code, s390_r13, 0);
3696                                 s390_j     (code, 4);
3697                                 s390_word  (code, ins->inst_p0);
3698                                 s390_l     (code, s390_r13, 0, s390_r13, 4);
3699                                 s390_ld    (code, ins->dreg, 0, s390_r13, 0);
3700                         }
3701                 }
3702                         break;
3703                 case OP_R4CONST: {
3704                         if (*((float *) ins->inst_p0) == 0) {
3705                                 s390_lzdr (code, ins->dreg);
3706                         } else {
3707                                 s390_basr (code, s390_r13, 0);
3708                                 s390_j    (code, 4);
3709                                 s390_word (code, ins->inst_p0);
3710                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3711                                 s390_ldeb (code, ins->dreg, 0, s390_r13, 0);
3712                         }
3713                 }
3714                         break;
3715                 case OP_STORER8_MEMBASE_REG: {
3716                         if (s390_is_uimm12(ins->inst_offset)) {
3717                                 s390_std  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
3718                         } else {
3719                                 s390_basr (code, s390_r13, 0);
3720                                 s390_j    (code, 4);
3721                                 s390_word (code, ins->inst_offset);
3722                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3723                                 s390_std  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
3724                         }
3725                 }
3726                         break;
3727                 case OP_LOADR8_MEMBASE: {
3728                         if (s390_is_uimm12(ins->inst_offset)) {
3729                                 s390_ld   (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
3730                         } else {
3731                                 s390_basr (code, s390_r13, 0);
3732                                 s390_j    (code, 4);
3733                                 s390_word (code, ins->inst_offset);
3734                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3735                                 s390_ld   (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
3736                         }
3737                 }
3738                         break;
3739                 case OP_STORER4_MEMBASE_REG: {
3740                         if (s390_is_uimm12(ins->inst_offset)) {
3741                                 s390_ledbr(code, s390_f15, ins->sreg1);
3742                                 s390_ste  (code, s390_f15, 0, ins->inst_destbasereg, ins->inst_offset);
3743                         } else {
3744                                 s390_basr (code, s390_r13, 0);
3745                                 s390_j    (code, 4);
3746                                 s390_word (code, ins->inst_offset);
3747                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3748                                 s390_ledbr(code, s390_f15, ins->sreg1);
3749                                 s390_ste  (code, s390_f15, s390_r13, ins->inst_destbasereg, 0);
3750                         }
3751                 }
3752                         break;
3753                 case OP_LOADR4_MEMBASE: {
3754                         if (s390_is_uimm12(ins->inst_offset)) {
3755                                 s390_ldeb (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
3756                         } else {
3757                                 s390_basr (code, s390_r13, 0);
3758                                 s390_j    (code, 4);
3759                                 s390_word (code, ins->inst_offset);
3760                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3761                                 s390_ldeb (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
3762                         }
3763                 }
3764                         break;
3765                 case CEE_CONV_R_UN: {
3766                         s390_cdfbr (code, ins->dreg, ins->sreg1);
3767                         s390_ltr   (code, ins->sreg1, ins->sreg1);
3768                         s390_jnl   (code, 12);
3769                         s390_basr  (code, s390_r13, 0);
3770                         s390_j     (code, 6);
3771                         s390_word  (code, 0x41f00000);
3772                         s390_word  (code, 0);
3773                         s390_adb   (code, ins->dreg, 0, s390_r13, 4);
3774                 }
3775                         break;
3776                 case CEE_CONV_R4: {
3777                         s390_cdfbr (code, ins->dreg, ins->sreg1);
3778                 }
3779                         break;
3780                 case CEE_CONV_R8: {
3781                         s390_cdfbr (code, ins->dreg, ins->sreg1);
3782                 }
3783                         break;
3784                 case OP_FCONV_TO_I1:
3785                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 1, TRUE);
3786                         break;
3787                 case OP_FCONV_TO_U1:
3788                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 1, FALSE);
3789                         break;
3790                 case OP_FCONV_TO_I2:
3791                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 2, TRUE);
3792                         break;
3793                 case OP_FCONV_TO_U2:
3794                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 2, FALSE);
3795                         break;
3796                 case OP_FCONV_TO_I4:
3797                 case OP_FCONV_TO_I:
3798                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 4, TRUE);
3799                         break;
3800                 case OP_FCONV_TO_U4:
3801                 case OP_FCONV_TO_U:
3802                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 4, FALSE);
3803                         break;
3804                 case OP_FCONV_TO_I8:
3805                 case OP_FCONV_TO_U8:
3806                         g_assert_not_reached ();
3807                         /* Implemented as helper calls */
3808                         break;
3809                 case OP_LCONV_TO_R_UN:
3810                         g_assert_not_reached ();
3811                         /* Implemented as helper calls */
3812                         break;
3813                 case OP_LCONV_TO_OVF_I: {
3814                         /* Valid ints: 0xffffffff:8000000 to 00000000:0x7f000000 */
3815                         short int *o[5];
3816                         s390_ltr  (code, ins->sreg1, ins->sreg1);
3817                         s390_jnl  (code, 0); CODEPTR(code, o[0]);
3818                         s390_ltr  (code, ins->sreg2, ins->sreg2);
3819                         s390_jnl  (code, 0); CODEPTR(code, o[1]);
3820                         s390_lhi  (code, s390_r13, -1);
3821                         s390_cr   (code, ins->sreg2, s390_r13);
3822                         s390_jnz  (code, 0); CODEPTR(code, o[2]);
3823                         if (ins->dreg != ins->sreg1)
3824                                 s390_lr   (code, ins->dreg, ins->sreg1);
3825                         s390_j    (code, 0); CODEPTR(code, o[3]);
3826                         PTRSLOT(code, o[0]);
3827                         s390_ltr  (code, ins->sreg2, ins->sreg2);
3828                         s390_jz   (code, 0); CODEPTR(code, o[4]);
3829                         PTRSLOT(code, o[1]);
3830                         PTRSLOT(code, o[2]);
3831                         mono_add_patch_info (cfg, code - cfg->native_code,
3832                                              MONO_PATCH_INFO_EXC, "OverflowException");
3833                         s390_brasl (code, s390_r14, 0);
3834                         PTRSLOT(code, o[3]);
3835                         PTRSLOT(code, o[4]);
3836                 }
3837                         break;
3838                 case OP_SQRT: {
3839                         s390_sqdbr (code, ins->dreg, ins->sreg1);
3840                 }
3841                         break;
3842                 case OP_FADD: {
3843                         CHECK_SRCDST_COM_F;
3844                         s390_adbr (code, ins->dreg, src2);
3845                 }
3846                         break;
3847                 case OP_FSUB: {
3848                         CHECK_SRCDST_NCOM_F;
3849                         s390_sdbr (code, ins->dreg, src2);
3850                 }
3851                         break;
3852                 case OP_FMUL: {
3853                         CHECK_SRCDST_COM_F;
3854                         s390_mdbr (code, ins->dreg, src2);
3855                 }
3856                         break;
3857                 case OP_FDIV: {
3858                         CHECK_SRCDST_NCOM_F;
3859                         s390_ddbr (code, ins->dreg, src2);
3860                 }
3861                         break;
3862                 case OP_FNEG: {
3863                         s390_lcdbr (code, ins->dreg, ins->sreg1);
3864                 }
3865                         break;
3866                 case OP_FREM: {
3867                         CHECK_SRCDST_NCOM_F;
3868                         s390_didbr (code, ins->dreg, src2, 5, s390_f15);
3869                 }
3870                         break;
3871                 case OP_FCOMPARE: {
3872                         s390_cdbr (code, ins->sreg1, ins->sreg2);
3873                 }
3874                         break;
3875                 case OP_FCEQ: {
3876                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3877                         s390_lhi   (code, ins->dreg, 1);
3878                         s390_je    (code, 4);
3879                         s390_lhi   (code, ins->dreg, 0);
3880                 }
3881                         break;
3882                 case OP_FCLT: {
3883                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3884                         s390_lhi   (code, ins->dreg, 1);
3885                         s390_jl    (code, 4);
3886                         s390_lhi   (code, ins->dreg, 0);
3887                 }
3888                         break;
3889                 case OP_FCLT_UN: {
3890                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3891                         s390_lhi   (code, ins->dreg, 1);
3892                         s390_jlo   (code, 4);
3893                         s390_lhi   (code, ins->dreg, 0);
3894                 }
3895                         break;
3896                 case OP_FCGT: {
3897                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3898                         s390_lhi   (code, ins->dreg, 1);
3899                         s390_jh    (code, 4);
3900                         s390_lhi   (code, ins->dreg, 0);
3901                 }
3902                         break;
3903                 case OP_FCGT_UN: {
3904                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3905                         s390_lhi   (code, ins->dreg, 1);
3906                         s390_jho   (code, 4);
3907                         s390_lhi   (code, ins->dreg, 0);
3908                 }
3909                         break;
3910                 case OP_FBEQ:
3911                         EMIT_COND_BRANCH (ins, S390_CC_EQ|S390_CC_OV);
3912                         break;
3913                 case OP_FBNE_UN:
3914                         EMIT_COND_BRANCH (ins, S390_CC_NE|S390_CC_OV);
3915                         break;
3916                 case OP_FBLT:
3917                         EMIT_COND_BRANCH (ins, S390_CC_LT);
3918                         break;
3919                 case OP_FBLT_UN:
3920                         EMIT_COND_BRANCH (ins, S390_CC_LT|S390_CC_OV);
3921                         break;
3922                 case OP_FBGT:
3923                         EMIT_COND_BRANCH (ins, S390_CC_GT);
3924                         break;
3925                 case OP_FBGT_UN:
3926                         EMIT_COND_BRANCH (ins, S390_CC_GT|S390_CC_OV);
3927                         break;
3928                 case OP_FBGE:
3929                         EMIT_COND_BRANCH (ins, S390_CC_GE);
3930                         break;
3931                 case OP_FBGE_UN:
3932                         EMIT_COND_BRANCH (ins, S390_CC_GE|S390_CC_OV);
3933                         break;
3934                 case OP_FBLE:
3935                         EMIT_COND_BRANCH (ins, S390_CC_LE);
3936                         break;
3937                 case OP_FBLE_UN:
3938                         EMIT_COND_BRANCH (ins, S390_CC_LE|S390_CC_OV);
3939                         break;
3940                 case CEE_CKFINITE: {
3941                         short *o;
3942                         s390_lhi  (code, s390_r13, 0x7f);
3943                         s390_tcdb (code, ins->sreg1, 0, s390_r13, 0);
3944                         s390_jz   (code, 0); CODEPTR(code, o);
3945                         mono_add_patch_info (cfg, code - cfg->native_code,
3946                                              MONO_PATCH_INFO_EXC, "ArithmeticException");
3947                         s390_brasl (code, s390_r14,0);
3948                         PTRSLOT(code, o);
3949                 }
3950                         break;
3951                 case OP_S390_MOVE: {
3952                         if (ins->backend.size > 0) {
3953                                 if (ins->backend.size <= 256) {
3954                                         s390_mvc  (code, ins->backend.size, ins->dreg,
3955                                                    ins->inst_offset, ins->sreg1, ins->inst_imm);
3956                                 } else {
3957                                         s390_lr   (code, s390_r0, ins->dreg);
3958                                         if (s390_is_imm16 (ins->inst_offset)) {
3959                                                 s390_ahi  (code, s390_r0, ins->inst_offset);
3960                                         } else {
3961                                                 s390_basr (code, s390_r13, 0);
3962                                                 s390_j    (code, 4);
3963                                                 s390_word (code, ins->inst_offset);
3964                                                 s390_a    (code, s390_r0, 0, s390_r13, 4);
3965                                         }
3966                                         s390_lr   (code, s390_r14, s390_r12);
3967                                         s390_lr   (code, s390_r12, ins->sreg1);
3968                                         if (s390_is_imm16 (ins->inst_imm)) {
3969                                                 s390_ahi  (code, s390_r12, ins->inst_imm);
3970                                         } else {
3971                                                 s390_basr (code, s390_r13, 0);
3972                                                 s390_j    (code, 4);
3973                                                 s390_word (code, ins->inst_imm);
3974                                                 s390_a    (code, s390_r12, 0, s390_r13, 4);
3975                                         }
3976                                         s390_lr   (code, s390_r1, ins->sreg1);
3977                                         s390_lr   (code, s390_r13, s390_r1);
3978                                         s390_mvcle(code, s390_r0, s390_r12, 0, 0);
3979                                         s390_jo   (code, -2);
3980                                         s390_lr   (code, s390_r12, s390_r14);
3981                                 }
3982                         }
3983                 }
3984                         break;
3985                 case OP_ATOMIC_ADD_I4: {
3986                         s390_lr  (code, s390_r1, ins->sreg2);
3987                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
3988                         s390_a   (code, s390_r1, 0, ins->inst_basereg, ins->inst_offset);
3989                         s390_cs  (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
3990                         s390_jnz (code, -7);
3991                         s390_lr  (code, ins->dreg, s390_r1);
3992                 }
3993                         break;
3994                 case OP_ATOMIC_ADD_NEW_I4: {
3995                         s390_lr  (code, s390_r1, ins->sreg2);
3996                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
3997                         s390_a   (code, s390_r1, 0, ins->inst_basereg, ins->inst_offset);
3998                         s390_cs  (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
3999                         s390_jnz (code, -7);
4000                         s390_lr  (code, ins->dreg, s390_r1);
4001                 }
4002                         break;
4003                 case OP_ATOMIC_EXCHANGE_I4: {
4004                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4005                         s390_cs  (code, s390_r0, ins->sreg2, ins->inst_basereg, ins->inst_offset);
4006                         s390_jnz (code, -4);
4007                         s390_lr  (code, ins->dreg, s390_r0);
4008                 }
4009                         break;
4010                 case OP_S390_BKCHAIN: {
4011                         s390_lr  (code, ins->dreg, ins->sreg1);
4012                         if (s390_is_imm16 (cfg->stack_offset)) {
4013                                 s390_ahi (code, ins->dreg, cfg->stack_offset);
4014                         } else {
4015                                 s390_basr (code, s390_r13, 0);
4016                                 s390_j    (code, 6);
4017                                 s390_word (code, cfg->stack_offset);
4018                                 s390_a    (code, ins->dreg, 0, s390_r13, 4);
4019                         }
4020                 }
4021                 case OP_MEMORY_BARRIER: {
4022                 }
4023                         break;
4024                 default:
4025                         g_warning ("unknown opcode %s in %s()\n", mono_inst_name (ins->opcode), __FUNCTION__);
4026                         g_assert_not_reached ();
4027                 }
4028
4029                 if ((cfg->opt & MONO_OPT_BRANCH) && ((code - cfg->native_code - offset) > max_len)) {
4030                         g_warning ("wrong maximal instruction length of instruction %s (expected %d, got %d)",
4031                                    mono_inst_name (ins->opcode), max_len, code - cfg->native_code - offset);
4032                         g_assert_not_reached ();
4033                 }
4034
4035                 cpos += max_len;
4036
4037                 last_ins = ins;
4038                 last_offset = offset;
4039
4040                 ins = ins->next;
4041         }
4042
4043         cfg->code_len = code - cfg->native_code;
4044 }
4045
4046 /*========================= End of Function ========================*/
4047
4048 /*------------------------------------------------------------------*/
4049 /*                                                                  */
4050 /* Name         - mono_arch_register_lowlevel_calls                 */
4051 /*                                                                  */
4052 /* Function     - Register routines to help with --trace operation. */
4053 /*                                                                  */
4054 /*------------------------------------------------------------------*/
4055
4056 void
4057 mono_arch_register_lowlevel_calls (void)
4058 {
4059         mono_register_jit_icall (mono_arch_break, "mono_arch_break", NULL, TRUE);
4060         mono_register_jit_icall (mono_arch_get_lmf_addr, "mono_arch_get_lmf_addr", NULL, TRUE);
4061 }
4062
4063 /*========================= End of Function ========================*/
4064
4065 /*------------------------------------------------------------------*/
4066 /*                                                                  */
4067 /* Name         - mono_arch_patch_code                              */
4068 /*                                                                  */
4069 /* Function     - Process the patch data created during the         */
4070 /*                instruction build process. This resolves jumps,   */
4071 /*                calls, variables etc.                             */
4072 /*                                                                  */
4073 /*------------------------------------------------------------------*/
4074
4075 static void
4076 mono_arch_break(void) {
4077 }
4078
4079 /*========================= End of Function ========================*/
4080
4081 /*------------------------------------------------------------------*/
4082 /*                                                                  */
4083 /* Name         - mono_arch_patch_code                              */
4084 /*                                                                  */
4085 /* Function     - Process the patch data created during the         */
4086 /*                instruction build process. This resolves jumps,   */
4087 /*                calls, variables etc.                             */
4088 /*                                                                  */
4089 /*------------------------------------------------------------------*/
4090
4091 void
4092 mono_arch_patch_code (MonoMethod *method, MonoDomain *domain,
4093                       guint8 *code, MonoJumpInfo *ji, gboolean run_cctors)
4094 {
4095         MonoJumpInfo *patch_info;
4096
4097         for (patch_info = ji; patch_info; patch_info = patch_info->next) {
4098                 unsigned char *ip = patch_info->ip.i + code;
4099                 gconstpointer target = NULL;
4100
4101                 target = mono_resolve_patch_target (method, domain, code,
4102                                                     patch_info, run_cctors);
4103
4104                 switch (patch_info->type) {
4105                         case MONO_PATCH_INFO_IP:
4106                         case MONO_PATCH_INFO_EXC_NAME:
4107                         case MONO_PATCH_INFO_LDSTR:
4108                         case MONO_PATCH_INFO_TYPE_FROM_HANDLE:
4109                         case MONO_PATCH_INFO_LDTOKEN:
4110                         case MONO_PATCH_INFO_EXC:
4111                                 continue;
4112                         case MONO_PATCH_INFO_SWITCH:
4113                                 /*----------------------------------*/
4114                                 /* ip points at the basr r13,0/j +4 */
4115                                 /* instruction the vtable value     */
4116                                 /* follows this (i.e. ip+6)         */
4117                                 /*----------------------------------*/
4118                                 *((gconstpointer *)(ip+6)) = target;
4119                                 target = NULL;
4120                                 continue;
4121                         case MONO_PATCH_INFO_METHODCONST:
4122                         case MONO_PATCH_INFO_CLASS:
4123                         case MONO_PATCH_INFO_IMAGE:
4124                         case MONO_PATCH_INFO_FIELD:
4125                         case MONO_PATCH_INFO_IID:
4126                                 target = S390_RELATIVE(target, ip);
4127                                 continue;
4128                         case MONO_PATCH_INFO_R4:
4129                         case MONO_PATCH_INFO_R8:
4130                         case MONO_PATCH_INFO_METHOD_REL:
4131                                 g_assert_not_reached ();
4132                                 continue;
4133                         default:
4134                                 target = S390_RELATIVE(target, ip);
4135                                 ip += 2;
4136                 }
4137                 s390_patch (ip, (guint32) target);
4138         }
4139 }
4140
4141 /*========================= End of Function ========================*/
4142
4143 /*------------------------------------------------------------------*/
4144 /*                                                                  */
4145 /* Name         - emit_load_volatile_registers                      */
4146 /*                                                                  */
4147 /* Function     - Create the instruction sequence for loading the   */
4148 /*                parameter registers for use with the 'tail' op.   */
4149 /*                                                                  */
4150 /*                The register loading operations performed here    */
4151 /*                are the mirror of the store operations performed  */
4152 /*                in mono_arch_emit_prolog and need to be kept in   */
4153 /*                synchronization with it.                          */
4154 /*                                                                  */
4155 /*------------------------------------------------------------------*/
4156
4157 guint8 *
4158 emit_load_volatile_registers(guint8 * code, MonoCompile *cfg)
4159 {
4160         MonoMethod *method = cfg->method;
4161         MonoMethodSignature *sig;
4162         MonoInst *inst;
4163         int pos, i;
4164         CallInfo *cinfo;
4165         size_data sz;
4166
4167         sig = mono_method_signature (method);
4168         pos = 0;
4169
4170         cinfo = calculate_sizes (sig, &sz, sig->pinvoke);
4171
4172         if (cinfo->struct_ret) {
4173                 ArgInfo *ainfo = &cinfo->ret;
4174                 inst         = cfg->ret;
4175                 s390_l (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4176         }
4177
4178         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
4179                 ArgInfo *ainfo = cinfo->args + i;
4180                 inst = cfg->varinfo [pos];
4181
4182                 if (inst->opcode == OP_REGVAR) {
4183                         if (ainfo->regtype == RegTypeGeneral)
4184                                 s390_lr (code, ainfo->reg, inst->dreg);
4185                         else if (ainfo->regtype == RegTypeFP) {
4186                                 if (inst->dreg != ainfo->reg) {
4187                                         if (ainfo->size == 4) {
4188                                                 s390_ldebr (code, ainfo->reg, inst->dreg);
4189                                         } else {
4190                                                 s390_ldr   (code, ainfo->reg, inst->dreg);
4191                                         }
4192                                 }
4193                         }
4194                         else if (ainfo->regtype == RegTypeBase) {
4195                         } else
4196                                 g_assert_not_reached ();
4197                 } else {
4198                         if (ainfo->regtype == RegTypeGeneral) {
4199                                 if (!((ainfo->reg >= 2) && (ainfo->reg <= 6)))
4200                                         g_assert_not_reached();
4201                                 switch (ainfo->size) {
4202                                 case 1:
4203                                         s390_ic (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4204                                         break;
4205                                 case 2:
4206                                         s390_lh (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4207                                         break;
4208                                 case 8:
4209                                         s390_lm (code, ainfo->reg, ainfo->reg + 1,
4210                                                   inst->inst_basereg, inst->inst_offset);
4211                                         break;
4212                                 default:
4213                                         s390_l  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4214                                 }
4215                         } else if (ainfo->regtype == RegTypeBase) {
4216                         } else if (ainfo->regtype == RegTypeFP) {
4217                                 if (ainfo->size == 8)
4218                                         s390_ld (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4219                                 else if (ainfo->size == 4)
4220                                         s390_le (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4221                                 else
4222                                         g_assert_not_reached ();
4223                         } else if (ainfo->regtype == RegTypeStructByVal) {
4224                                 if (ainfo->reg != STK_BASE) {
4225                                         switch (ainfo->size) {
4226                                         case 1:
4227                                                 s390_ic (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4228                                                 break;
4229                                         case 2:
4230                                                 s390_lh (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4231                                                 break;
4232                                         case 4:
4233                                                 s390_l  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4234                                                 break;
4235                                         case 8:
4236                                                 s390_lm (code, ainfo->reg, ainfo->reg+1, inst->inst_basereg, inst->inst_offset);
4237                                                 break;
4238                                         }
4239                                 }
4240                         } else if (ainfo->regtype == RegTypeStructByAddr) {
4241                                 if (ainfo->reg != STK_BASE) {
4242                                         s390_l  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4243                                 }
4244                         } else
4245                                 g_assert_not_reached ();
4246                 }
4247                 pos++;
4248         }
4249
4250         g_free (cinfo);
4251
4252         return code;
4253 }
4254
4255 /*========================= End of Function ========================*/
4256
4257 /*------------------------------------------------------------------*/
4258 /*                                                                  */
4259 /* Name         - mono_arch_emit_prolog                             */
4260 /*                                                                  */
4261 /* Function     - Create the instruction sequence for a function    */
4262 /*                prolog.                                           */
4263 /*                                                                  */
4264 /*------------------------------------------------------------------*/
4265
4266 guint8 *
4267 mono_arch_emit_prolog (MonoCompile *cfg)
4268 {
4269         MonoMethod *method = cfg->method;
4270         MonoBasicBlock *bb;
4271         MonoMethodSignature *sig;
4272         MonoInst *inst;
4273         int alloc_size, pos, max_offset, i;
4274         guint8 *code;
4275         CallInfo *cinfo;
4276         size_data sz;
4277         int tracing = 0;
4278         int lmfOffset;                                                          \
4279
4280         if (mono_jit_trace_calls != NULL && mono_trace_eval (method))
4281                 tracing = 1;
4282
4283         cfg->code_size   = 512;
4284         cfg->native_code = code = g_malloc (cfg->code_size);
4285
4286         s390_stm  (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
4287
4288         if (cfg->flags & MONO_CFG_HAS_ALLOCA) {
4289                 cfg->used_int_regs |= 1 << 11;
4290         }
4291
4292         alloc_size = cfg->stack_offset;
4293
4294         cfg->stack_usage = alloc_size;
4295         s390_lr   (code, s390_r11, STK_BASE);
4296         if (s390_is_uimm16 (alloc_size)) {
4297                 s390_ahi  (code, STK_BASE, -alloc_size);
4298         } else {
4299                 int stackSize = alloc_size;
4300                 while (stackSize > 32767) {
4301                         s390_ahi  (code, STK_BASE, -32767);
4302                         stackSize -= 32767;
4303                 }
4304                 s390_ahi  (code, STK_BASE, -stackSize);
4305         }
4306         s390_st   (code, s390_r11, 0, STK_BASE, 0);
4307
4308         if (cfg->frame_reg != STK_BASE)
4309                 s390_lr (code, s390_r11, STK_BASE);
4310
4311         /* compute max_offset in order to use short forward jumps
4312          * we always do it on s390 because the immediate displacement
4313          * for jumps is too small
4314          */
4315         max_offset = 0;
4316         for (bb = cfg->bb_entry; bb; bb = bb->next_bb) {
4317                 MonoInst *ins = bb->code;
4318                 bb->max_offset = max_offset;
4319
4320                 if (cfg->prof_options & MONO_PROFILE_COVERAGE)
4321                         max_offset += 6;
4322
4323                 while (ins) {
4324                         max_offset += ((guint8 *)ins_spec [ins->opcode])[MONO_INST_LEN];
4325                         ins = ins->next;
4326                 }
4327         }
4328
4329         /* load arguments allocated to register from the stack */
4330         sig = mono_method_signature (method);
4331         pos = 0;
4332
4333         cinfo = calculate_sizes (sig, &sz, sig->pinvoke);
4334
4335         if (cinfo->struct_ret) {
4336                 ArgInfo *ainfo = &cinfo->ret;
4337                 inst         = cfg->ret;
4338                 inst->backend.size = ainfo->vtsize;
4339                 s390_st (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4340         }
4341
4342         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
4343                 ArgInfo *ainfo = cinfo->args + i;
4344                 inst = cfg->varinfo [pos];
4345
4346                 if (inst->opcode == OP_REGVAR) {
4347                         if (ainfo->regtype == RegTypeGeneral)
4348                                 s390_lr (code, inst->dreg, ainfo->reg);
4349                         else if (ainfo->regtype == RegTypeFP) {
4350                                 if (inst->dreg != ainfo->reg) {
4351                                         if (ainfo->size == 4) {
4352                                                 s390_ledbr (code, inst->dreg, ainfo->reg);
4353                                         } else {
4354                                                 s390_ldr   (code, inst->dreg, ainfo->reg);
4355                                         }
4356                                 }
4357                         }
4358                         else if (ainfo->regtype == RegTypeBase) {
4359                                 s390_lr  (code, s390_r13, STK_BASE);
4360                                 s390_ahi (code, s390_r13, alloc_size);
4361                                 s390_l   (code, inst->dreg, 0, s390_r13, ainfo->offset);
4362                         } else
4363                                 g_assert_not_reached ();
4364
4365                         if (cfg->verbose_level > 2)
4366                                 g_print ("Argument %d assigned to register %s\n",
4367                                          pos, mono_arch_regname (inst->dreg));
4368                 } else {
4369                         if (ainfo->regtype == RegTypeGeneral) {
4370                                 if (!((ainfo->reg >= 2) && (ainfo->reg <= 6)))
4371                                         g_assert_not_reached();
4372                                 switch (ainfo->size) {
4373                                 case 1:
4374                                         s390_stc (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4375                                         break;
4376                                 case 2:
4377                                         s390_sth (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4378                                         break;
4379                                 case 8:
4380                                         s390_stm (code, ainfo->reg, ainfo->reg + 1,
4381                                                   inst->inst_basereg, inst->inst_offset);
4382                                         break;
4383                                 default:
4384                                         s390_st  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4385                                 }
4386                         } else if (ainfo->regtype == RegTypeBase) {
4387                         } else if (ainfo->regtype == RegTypeFP) {
4388                                 if (ainfo->size == 8)
4389                                         s390_std (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4390                                 else if (ainfo->size == 4)
4391                                         s390_ste (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4392                                 else
4393                                         g_assert_not_reached ();
4394                         } else if (ainfo->regtype == RegTypeStructByVal) {
4395                                 int doffset = inst->inst_offset;
4396                                 int reg;
4397                                 if (ainfo->reg != STK_BASE)
4398                                         reg = ainfo->reg;
4399                                 else {
4400                                         reg = s390_r0;
4401                                         s390_lr  (code, s390_r13, STK_BASE);
4402                                         s390_ahi (code, s390_r13, alloc_size);
4403                                 }
4404                                 switch (ainfo->size) {
4405                                         case 1:
4406                                                 if (ainfo->reg == STK_BASE)
4407                                                         s390_ic  (code, reg, 0, s390_r13, ainfo->offset+3);
4408                                                 s390_stc (code, reg, 0, inst->inst_basereg, doffset);
4409                                                 break;
4410                                         case 2:
4411                                                 if (ainfo->reg == STK_BASE)
4412                                                         s390_lh  (code, reg, 0, s390_r13, ainfo->offset+2);
4413                                                 s390_sth (code, reg, 0, inst->inst_basereg, doffset);
4414                                                 break;
4415                                         case 4:
4416                                                 if (ainfo->reg == STK_BASE)
4417                                                         s390_l   (code, reg, 0, s390_r13, ainfo->offset);
4418                                                 s390_st  (code, reg, 0, inst->inst_basereg, doffset);
4419                                                 break;
4420                                         case 8:
4421                                                 if (ainfo->reg == STK_BASE)
4422                                                         s390_lm  (code, s390_r0, s390_r1, s390_r13, ainfo->offset);
4423                                                 s390_stm (code, reg, reg+1, inst->inst_basereg, doffset);
4424                                                 break;
4425                                 }
4426                         } else if (ainfo->regtype == RegTypeStructByAddr) {
4427                                 if (ainfo->reg != STK_BASE)
4428                                         s390_st  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4429                         } else
4430                                 g_assert_not_reached ();
4431                 }
4432                 pos++;
4433         }
4434
4435         if (method->save_lmf) {
4436                 /*---------------------------------------------------------------*/
4437                 /* we build the MonoLMF structure on the stack - see mini-s390.h */
4438                 /*---------------------------------------------------------------*/
4439                 lmfOffset = alloc_size - sizeof(MonoLMF);
4440
4441                 s390_lr    (code, s390_r13, cfg->frame_reg);
4442                 if (s390_is_uimm16(lmfOffset))
4443                         s390_ahi   (code, s390_r13, lmfOffset);
4444                 else {
4445                         s390_basr (code, s390_r14, 0);
4446                         s390_j    (code, 4);
4447                         s390_word (code, lmfOffset);
4448                         s390_a    (code, s390_r13, 0, s390_r14, 4);
4449                 }
4450
4451                 /*---------------------------------------------------------------*/
4452                 /* Preserve the parameter registers while we fix up the lmf      */
4453                 /*---------------------------------------------------------------*/
4454                 s390_stm   (code, s390_r2, s390_r6, s390_r13,
4455                             G_STRUCT_OFFSET(MonoLMF, pregs[0]));
4456
4457                 /*---------------------------------------------------------------*/
4458                 /* On return from this call r2 have the address of the &lmf      */
4459                 /*---------------------------------------------------------------*/
4460                 mono_add_patch_info (cfg, code - cfg->native_code,
4461                                      MONO_PATCH_INFO_INTERNAL_METHOD,
4462                                      (gpointer)"mono_get_lmf_addr");
4463                 s390_brasl (code, s390_r14, 0);
4464
4465                 /*---------------------------------------------------------------*/
4466                 /* Set lmf.lmf_addr = jit_tls->lmf                               */
4467                 /*---------------------------------------------------------------*/
4468                 s390_st    (code, s390_r2, 0, s390_r13,
4469                             G_STRUCT_OFFSET(MonoLMF, lmf_addr));
4470
4471                 /*---------------------------------------------------------------*/
4472                 /* Get current lmf                                               */
4473                 /*---------------------------------------------------------------*/
4474                 s390_l     (code, s390_r0, 0, s390_r2, 0);
4475
4476                 /*---------------------------------------------------------------*/
4477                 /* Set our lmf as the current lmf                                */
4478                 /*---------------------------------------------------------------*/
4479                 s390_st    (code, s390_r13, 0, s390_r2, 0);
4480
4481                 /*---------------------------------------------------------------*/
4482                 /* Have our lmf.previous_lmf point to the last lmf               */
4483                 /*---------------------------------------------------------------*/
4484                 s390_st    (code, s390_r0, 0, s390_r13,
4485                             G_STRUCT_OFFSET(MonoLMF, previous_lmf));
4486
4487                 /*---------------------------------------------------------------*/
4488                 /* save method info                                              */
4489                 /*---------------------------------------------------------------*/
4490                 s390_basr  (code, s390_r1, 0);
4491                 s390_j     (code, 4);
4492                 s390_word  (code, method);
4493                 s390_l     (code, s390_r1, 0, s390_r1, 4);
4494                 s390_st    (code, s390_r1, 0, s390_r13,
4495                             G_STRUCT_OFFSET(MonoLMF, method));
4496
4497                 /*---------------------------------------------------------------*/
4498                 /* save the current IP                                           */
4499                 /*---------------------------------------------------------------*/
4500                 s390_st    (code, STK_BASE, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, ebp));
4501                 s390_basr  (code, s390_r1, 0);
4502                 s390_la    (code, s390_r1, 0, s390_r1, 0);
4503                 s390_st    (code, s390_r1, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, eip));
4504
4505                 /*---------------------------------------------------------------*/
4506                 /* Save general and floating point registers                     */
4507                 /*---------------------------------------------------------------*/
4508                 s390_stm   (code, s390_r2, s390_r12, s390_r13,
4509                             G_STRUCT_OFFSET(MonoLMF, gregs[2]));
4510                 for (i = 0; i < 16; i++) {
4511                         s390_std  (code, i, 0, s390_r13,
4512                                    G_STRUCT_OFFSET(MonoLMF, fregs[i]));
4513                 }
4514
4515                 /*---------------------------------------------------------------*/
4516                 /* Restore the parameter registers now that we've set up the lmf */
4517                 /*---------------------------------------------------------------*/
4518                 s390_lm    (code, s390_r2, s390_r6, s390_r13,
4519                             G_STRUCT_OFFSET(MonoLMF, pregs[0]));
4520         }
4521
4522         if (tracing)
4523                 code = mono_arch_instrument_prolog(cfg, enter_method, code, TRUE);
4524
4525         cfg->code_len = code - cfg->native_code;
4526         g_free (cinfo);
4527
4528         return code;
4529 }
4530
4531 /*========================= End of Function ========================*/
4532
4533 /*------------------------------------------------------------------*/
4534 /*                                                                  */
4535 /* Name         - mono_arch_emit_epilog                             */
4536 /*                                                                  */
4537 /* Function     - Emit the instructions for a function epilog.      */
4538 /*                                                                  */
4539 /*------------------------------------------------------------------*/
4540
4541 void
4542 mono_arch_emit_epilog (MonoCompile *cfg)
4543 {
4544         MonoMethod *method = cfg->method;
4545         int tracing = 0;
4546         guint8 *code;
4547         int max_epilog_size = 96;
4548
4549         if (cfg->method->save_lmf)
4550                 max_epilog_size += 128;
4551
4552         if (mono_jit_trace_calls != NULL)
4553                 max_epilog_size += 128;
4554
4555         if (cfg->prof_options & MONO_PROFILE_ENTER_LEAVE)
4556                 max_epilog_size += 128;
4557
4558         while ((cfg->code_len + max_epilog_size) > (cfg->code_size - 16)) {
4559                 cfg->code_size  *= 2;
4560                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
4561                 mono_jit_stats.code_reallocs++;
4562         }
4563
4564         code = cfg->native_code + cfg->code_len;
4565
4566         if (mono_jit_trace_calls != NULL && mono_trace_eval (method)) {
4567                 code = mono_arch_instrument_epilog (cfg, leave_method, code, TRUE);
4568                 tracing = 1;
4569         }
4570
4571         if (method->save_lmf)
4572                 restoreLMF(code, cfg->frame_reg, cfg->stack_usage);
4573
4574         if (cfg->flags & MONO_CFG_HAS_ALLOCA)
4575                 s390_l (code, STK_BASE, 0, STK_BASE, 0);
4576         else
4577                 code = backUpStackPtr(cfg, code, STK_BASE);
4578
4579         s390_lm  (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
4580         s390_br  (code, s390_r14);
4581
4582         cfg->code_len = code - cfg->native_code;
4583
4584         g_assert (cfg->code_len < cfg->code_size);
4585
4586 }
4587
4588 /*========================= End of Function ========================*/
4589
4590 /*------------------------------------------------------------------*/
4591 /*                                                                  */
4592 /* Name         - mono_arch_emit_exceptions                         */
4593 /*                                                                  */
4594 /* Function     - Emit the blocks to handle exception conditions.   */
4595 /*                                                                  */
4596 /*------------------------------------------------------------------*/
4597
4598 void
4599 mono_arch_emit_exceptions (MonoCompile *cfg)
4600 {
4601         MonoJumpInfo    *patch_info;
4602         guint8          *code;
4603         int             nThrows = 0,
4604                         exc_count = 0,
4605                         iExc;
4606         guint32         code_size;
4607         MonoClass       *exc_classes [MAX_EXC];
4608         guint8          *exc_throw_start [MAX_EXC],
4609                         *exc_throw_end [MAX_EXC];
4610
4611         for (patch_info = cfg->patch_info;
4612              patch_info;
4613              patch_info = patch_info->next) {
4614                 if (patch_info->type == MONO_PATCH_INFO_EXC)
4615                         exc_count++;
4616         }
4617
4618         code_size = exc_count * 26;
4619
4620         while ((cfg->code_len + code_size) > (cfg->code_size - 16)) {
4621                 cfg->code_size  *= 2;
4622                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
4623                 mono_jit_stats.code_reallocs++;
4624         }
4625
4626         code = cfg->native_code + cfg->code_len;
4627
4628         /*---------------------------------------------------------------------*/
4629         /* Add code to raise exceptions                                        */
4630         /*---------------------------------------------------------------------*/
4631         for (patch_info = cfg->patch_info; patch_info; patch_info = patch_info->next) {
4632                 switch (patch_info->type) {
4633                 case MONO_PATCH_INFO_EXC: {
4634                         guint8 *ip = patch_info->ip.i + cfg->native_code;
4635                         MonoClass *exc_class;
4636                         guint32 throw_ip;
4637
4638                         /*-----------------------------------------------------*/
4639                         /* Patch the branch in epilog to come here             */
4640                         /*-----------------------------------------------------*/
4641                         s390_patch (ip + 2, (guint32) (S390_RELATIVE(code,ip)));
4642
4643                         exc_class = mono_class_from_name (mono_defaults.corlib,
4644                                                           "System",
4645                                                           patch_info->data.name);
4646                         g_assert (exc_class);
4647                         throw_ip = patch_info->ip.i;
4648
4649                         for (iExc = 0; iExc < nThrows; ++iExc)
4650                                 if (exc_classes [iExc] == exc_class)
4651                                         break;
4652
4653                         if (iExc < nThrows) {
4654                                 s390_jcl (code, S390_CC_UN, (guint32) exc_throw_start [iExc]);
4655                                 patch_info->type = MONO_PATCH_INFO_NONE;
4656                         } else {
4657
4658                                 if (nThrows < MAX_EXC) {
4659                                         exc_classes [nThrows]     = exc_class;
4660                                         exc_throw_start [nThrows] = code;
4661                                 }
4662
4663                                 /*---------------------------------------------*/
4664                                 /* Patch the parameter passed to the handler   */
4665                                 /*---------------------------------------------*/
4666                                 s390_basr (code, s390_r13, 0);
4667                                 s390_j    (code, 4);
4668                                 s390_word (code, patch_info->data.target);
4669                                 /*---------------------------------------------*/
4670                                 /* Load return address & parameter register    */
4671                                 /*---------------------------------------------*/
4672                                 s390_larl (code, s390_r14, S390_RELATIVE((patch_info->ip.i +
4673                                                            cfg->native_code + 8), code));
4674                                 s390_l    (code, s390_r2, 0, s390_r13, 4);
4675                                 /*---------------------------------------------*/
4676                                 /* Reuse the current patch to set the jump     */
4677                                 /*---------------------------------------------*/
4678                                 patch_info->type      = MONO_PATCH_INFO_INTERNAL_METHOD;
4679                                 patch_info->data.name = "mono_arch_throw_exception_by_name";
4680                                 patch_info->ip.i      = code - cfg->native_code;
4681                                 s390_jcl  (code, S390_CC_UN, 0);
4682                         }
4683                         break;
4684                 }
4685                 default:
4686                         /* do nothing */
4687                         break;
4688                 }
4689         }
4690
4691         cfg->code_len = code - cfg->native_code;
4692
4693         g_assert (cfg->code_len < cfg->code_size);
4694
4695 }
4696
4697 /*========================= End of Function ========================*/
4698
4699 /*------------------------------------------------------------------*/
4700 /*                                                                  */
4701 /* Name         - mono_arch_setup_jit_tls_data                      */
4702 /*                                                                  */
4703 /* Function     - Setup the JIT's Thread Level Specific Data.       */
4704 /*                                                                  */
4705 /*------------------------------------------------------------------*/
4706
4707 void
4708 mono_arch_setup_jit_tls_data (MonoJitTlsData *tls)
4709 {
4710
4711         if (!tls_offset_inited) {
4712                 tls_offset_inited = TRUE;
4713
4714 #if HAVE_KW_THREAD
4715 # if 0
4716         __asm__ ("\tear\t%r1,0\n"
4717                  "\tlr\t%0,%3\n"
4718                  "\tsr\t%0,%r1\n"
4719                  "\tlr\t%1,%4\n"
4720                  "\tsr\t%1,%r1\n"
4721                  "\tlr\t%2,%5\n"
4722                  "\tsr\t%2,%r1\n"
4723                  : "=r" (appdomain_tls_offset),
4724                    "=r" (thread_tls_offset),
4725                    "=r" (lmf_tls_offset)
4726                  : "r" (&tls_appdomain),
4727                    "r" (&tls_current_object),
4728                    "r" (&mono_lmf_addr)
4729                  : "1", "cc");
4730 # endif
4731 #endif
4732         }
4733
4734         if (!lmf_addr_key_inited) {
4735                 lmf_addr_key_inited = TRUE;
4736                 pthread_key_create (&lmf_addr_key, NULL);
4737         }
4738         pthread_setspecific (lmf_addr_key, &tls->lmf);
4739
4740 }
4741
4742 /*========================= End of Function ========================*/
4743
4744 /*------------------------------------------------------------------*/
4745 /*                                                                  */
4746 /* Name         - mono_arch_free_jit_tls_data                       */
4747 /*                                                                  */
4748 /* Function     - Free tls data.                                    */
4749 /*                                                                  */
4750 /*------------------------------------------------------------------*/
4751
4752 void
4753 mono_arch_free_jit_tls_data (MonoJitTlsData *tls)
4754 {
4755
4756 }
4757
4758 /*========================= End of Function ========================*/
4759
4760 /*------------------------------------------------------------------*/
4761 /*                                                                  */
4762 /* Name         - mono_arch_emit_this_vret_args                     */
4763 /*                                                                  */
4764 /* Function     -                                                   */
4765 /*                                                                  */
4766 /*------------------------------------------------------------------*/
4767
4768 void
4769 mono_arch_emit_this_vret_args (MonoCompile *cfg, MonoCallInst *inst, int this_reg, int this_type, int vt_reg)
4770 {
4771         int this_dreg = s390_r2;
4772
4773         if (vt_reg != -1)
4774                 this_dreg = s390_r3;
4775
4776         /* add the this argument */
4777         if (this_reg != -1) {
4778                 MonoInst *this;
4779                 MONO_INST_NEW (cfg, this, OP_SETREG);
4780                 this->type  = this_type;
4781                 this->sreg1 = this_reg;
4782                 this->dreg  = mono_regstate_next_int (cfg->rs);
4783                 mono_bblock_add_inst (cfg->cbb, this);
4784                 mono_call_inst_add_outarg_reg (cfg, inst, this->dreg, this_dreg, FALSE);
4785         }
4786
4787         if (vt_reg != -1) {
4788                 MonoInst *vtarg;
4789                 MONO_INST_NEW (cfg, vtarg, OP_SETREG);
4790                 vtarg->type  = STACK_MP;
4791                 vtarg->sreg1 = vt_reg;
4792                 vtarg->dreg  = mono_regstate_next_int (cfg->rs);
4793                 mono_bblock_add_inst (cfg->cbb, vtarg);
4794                 mono_call_inst_add_outarg_reg (cfg, inst, vtarg->dreg, s390_r2, FALSE);
4795         }
4796 }
4797
4798 /*========================= End of Function ========================*/
4799
4800 /*------------------------------------------------------------------*/
4801 /*                                                                  */
4802 /* Name         - mono_arch_get_inst_for_method                   */
4803 /*                                                                  */
4804 /* Function     - Check for opcodes we can handle directly in       */
4805 /*                hardware.                                         */
4806 /*                                                                  */
4807 /*------------------------------------------------------------------*/
4808
4809 MonoInst*
4810 mono_arch_get_inst_for_method (MonoCompile *cfg, MonoMethod *cmethod,
4811                                MonoMethodSignature *fsig, MonoInst **args)
4812 {
4813         MonoInst *ins = NULL;
4814
4815         if (cmethod->klass == mono_defaults.math_class) {
4816                 if (strcmp (cmethod->name, "Sqrt") == 0) {
4817                         MONO_INST_NEW (cfg, ins, OP_SQRT);
4818                         ins->inst_i0 = args [0];
4819                 }
4820         } else if (cmethod->klass == mono_defaults.thread_class &&
4821                            strcmp (cmethod->name, "MemoryBarrier") == 0) {
4822                 MONO_INST_NEW (cfg, ins, OP_MEMORY_BARRIER);
4823         } else if(cmethod->klass->image == mono_defaults.corlib &&
4824                            (strcmp (cmethod->klass->name_space, "System.Threading") == 0) &&
4825                            (strcmp (cmethod->klass->name, "Interlocked") == 0)) {
4826
4827                 if (strcmp (cmethod->name, "Increment") == 0 &&
4828                     fsig->params [0]->type == MONO_TYPE_I4) {
4829                         MonoInst *ins_iconst;
4830
4831                         MONO_INST_NEW (cfg, ins, OP_ATOMIC_ADD_NEW_I4);
4832                         MONO_INST_NEW (cfg, ins_iconst, OP_ICONST);
4833                         ins_iconst->inst_c0 = 1;
4834
4835                         ins->inst_i0 = args [0];
4836                         ins->inst_i1 = ins_iconst;
4837                 } else if (strcmp (cmethod->name, "Decrement") == 0 &&
4838                            fsig->params [0]->type == MONO_TYPE_I4) {
4839                         MonoInst *ins_iconst;
4840
4841                         MONO_INST_NEW (cfg, ins, OP_ATOMIC_ADD_NEW_I4);
4842                         MONO_INST_NEW (cfg, ins_iconst, OP_ICONST);
4843                         ins_iconst->inst_c0 = -1;
4844
4845                         ins->inst_i0 = args [0];
4846                         ins->inst_i1 = ins_iconst;
4847                 } else if (strcmp (cmethod->name, "Exchange") == 0 &&
4848                            fsig->params [0]->type == MONO_TYPE_I4) {
4849                         MONO_INST_NEW (cfg, ins, OP_ATOMIC_EXCHANGE_I4);
4850
4851                         ins->inst_i0 = args [0];
4852                         ins->inst_i1 = args [1];
4853                 } else if (strcmp (cmethod->name, "Add") == 0 &&
4854                            fsig->params [0]->type == MONO_TYPE_I4) {
4855                         MONO_INST_NEW (cfg, ins, OP_ATOMIC_ADD_I4);
4856
4857                         ins->inst_i0 = args [0];
4858                         ins->inst_i1 = args [1];
4859                 }
4860         }
4861         return ins;
4862 }
4863
4864 /*========================= End of Function ========================*/
4865
4866 /*------------------------------------------------------------------*/
4867 /*                                                                  */
4868 /* Name         - mono_arch_print_tree                              */
4869 /*                                                                  */
4870 /* Function     - Print platform-specific opcode details.           */
4871 /*                                                                  */
4872 /* Returns      - 1 - opcode details have been printed              */
4873 /*                0 - opcode details have not been printed          */
4874 /*                                                                  */
4875 /*------------------------------------------------------------------*/
4876
4877 gboolean
4878 mono_arch_print_tree (MonoInst *tree, int arity)
4879 {
4880         gboolean done;
4881
4882         switch (tree->opcode) {
4883                 case OP_S390_LOADARG:
4884                 case OP_S390_ARGREG:
4885                 case OP_S390_ARGPTR:
4886                         printf ("[0x%lx(%s)]", tree->inst_offset,
4887                                 mono_arch_regname (tree->inst_basereg));
4888                         done = 1;
4889                         break;
4890                 case OP_S390_STKARG:
4891                         printf ("[0x%lx(previous_frame)]",
4892                                 tree->inst_offset);
4893                         done = 1;
4894                         break;
4895                 case OP_S390_MOVE:
4896                         printf ("[0x%lx(%d,%s),0x%lx(%s)]",
4897                                 tree->inst_offset, tree->backend.size,
4898                                 mono_arch_regname(tree->dreg), tree->inst_imm,
4899                                 mono_arch_regname(tree->sreg1));
4900                         done = 1;
4901                         break;
4902                 case OP_S390_SETF4RET:
4903                         printf ("[f%ld,f%ld]",
4904                                 mono_arch_regname (tree->dreg),
4905                                 mono_arch_regname (tree->sreg1));
4906                         done = 1;
4907                         break;
4908                 case OP_TLS_GET:
4909                         printf ("[0x%lx(0x%lx,%s)]", tree->inst_offset,
4910                                 tree->inst_imm,
4911                                 mono_arch_regname (tree->sreg1));
4912                         done = 1;
4913                         break;
4914                 case OP_S390_BKCHAIN:
4915                         printf ("[previous_frame(%s)]",
4916                                 mono_arch_regname (tree->sreg1));
4917                         done = 1;
4918                         break;
4919                 default:
4920                         done = 0;
4921         }
4922         return (done);
4923 }
4924
4925 /*========================= End of Function ========================*/
4926
4927 /*------------------------------------------------------------------*/
4928 /*                                                                  */
4929 /* Name         - mono_arch_regalloc_cost                           */
4930 /*                                                                  */
4931 /* Function     - Determine the cost, in the number of memory       */
4932 /*                references, of the action of allocating the var-  */
4933 /*                iable VMV into a register during global register  */
4934 /*                allocation.                                       */
4935 /*                                                                  */
4936 /* Returns      - Cost                                              */
4937 /*                                                                  */
4938 /*------------------------------------------------------------------*/
4939
4940 guint32
4941 mono_arch_regalloc_cost (MonoCompile *cfg, MonoMethodVar *vmv)
4942 {
4943         /* FIXME: */
4944         return 2;
4945 }
4946
4947 /*========================= End of Function ========================*/
4948
4949 /*------------------------------------------------------------------*/
4950 /*                                                                  */
4951 /* Name         - mono_arch_get_domain_intrinsic                    */
4952 /*                                                                  */
4953 /* Function     -                                                   */
4954 /*                                                                  */
4955 /* Returns      -                                                   */
4956 /*                                                                  */
4957 /*------------------------------------------------------------------*/
4958
4959 MonoInst *
4960 mono_arch_get_domain_intrinsic (MonoCompile* cfg)
4961 {
4962         MonoInst *ins;
4963
4964         if (appdomain_tls_offset == -1)
4965                 return NULL;
4966
4967         MONO_INST_NEW (cfg, ins, OP_TLS_GET);
4968         ins->inst_offset = appdomain_tls_offset;
4969         return (ins);
4970 }
4971
4972 /*========================= End of Function ========================*/
4973
4974 /*------------------------------------------------------------------*/
4975 /*                                                                  */
4976 /* Name         - mono_arch_get_thread_intrinsic                    */
4977 /*                                                                  */
4978 /* Function     -                                                   */
4979 /*                                                                  */
4980 /* Returns      -                                                   */
4981 /*                                                                  */
4982 /*------------------------------------------------------------------*/
4983
4984 MonoInst *
4985 mono_arch_get_thread_intrinsic (MonoCompile* cfg)
4986 {
4987         MonoInst *ins;
4988
4989         if (thread_tls_offset == -1)
4990                 return NULL;
4991
4992         MONO_INST_NEW (cfg, ins, OP_TLS_GET);
4993         ins->inst_offset = thread_tls_offset;
4994         return (ins);
4995 }
4996
4997 /*========================= End of Function ========================*/
4998
4999 /*------------------------------------------------------------------*/
5000 /*                                                                  */
5001 /* Name         - mono_arch_flush_register_windows                  */
5002 /*                                                                  */
5003 /* Function     -                                                   */
5004 /*                                                                  */
5005 /* Returns      -                                                   */
5006 /*                                                                  */
5007 /*------------------------------------------------------------------*/
5008
5009 void
5010 mono_arch_flush_register_windows (void)
5011 {
5012 }
5013
5014 /*========================= End of Function ========================*/
5015
5016 /*------------------------------------------------------------------*/
5017 /*                                                                  */
5018 /* Name         - mono_arch_get_lmf_addr                            */
5019 /*                                                                  */
5020 /* Function     -                                                   */
5021 /*                                                                  */
5022 /* Returns      -                                                   */
5023 /*                                                                  */
5024 /*------------------------------------------------------------------*/
5025
5026 gpointer
5027 mono_arch_get_lmf_addr (void)
5028 {
5029         return pthread_getspecific (lmf_addr_key);
5030 }
5031
5032
5033 /*========================= End of Function ========================*/
5034
5035 /*------------------------------------------------------------------*/
5036 /*                                                                  */
5037 /* Name         - mono_arch_get_patch_offset                        */
5038 /*                                                                  */
5039 /* Function     - Dummy entry point until s390x supports aot.       */
5040 /*                                                                  */
5041 /* Returns      - Offset for patch.                                 */
5042 /*                                                                  */
5043 /*------------------------------------------------------------------*/
5044
5045 guint32
5046 mono_arch_get_patch_offset (guint8 *code)
5047 {
5048         return 0;
5049 }
5050
5051 /*========================= End of Function ========================*/