mono/mini/mini-s390.c

   1 /*------------------------------------------------------------------*/
   2 /*                                                                  */
   3 /* Name        - mini-s390.c                                        */
   4 /*                                                                  */
   5 /* Function    - S/390 backend for the Mono code generator.         */
   6 /*                                                                  */
   7 /* Name        - Neale Ferguson (Neale.Ferguson@SoftwareAG-usa.com) */
   8 /*                                                                  */
   9 /* Date        - January, 2004                                      */
  10 /*                                                                  */
  11 /* Derivation  - From mini-x86 & mini-ppc by -                      */
  12 /*               Paolo Molaro (lupus@ximian.com)                    */
  13 /*               Dietmar Maurer (dietmar@ximian.com)                */
  14 /*                                                                  */
  15 /*------------------------------------------------------------------*/
  16
  17 /*------------------------------------------------------------------*/
  18 /*                 D e f i n e s                                    */
  19 /*------------------------------------------------------------------*/
  20
  21 #define NOT_IMPLEMENTED(x) \
  22         g_error ("FIXME: %s is not yet implemented.", x);
  23
  24 #define EMIT_COND_BRANCH(ins,cond)                                                      \
  25 {                                                                                       \
  26 if (ins->flags & MONO_INST_BRLABEL) {                                                   \
  27         if (ins->inst_i0->inst_c0) {                                                    \
  28                 int displace;                                                           \
  29                 displace = ((cfg->native_code + ins->inst_i0->inst_c0) - code) / 2;     \
  30                 if (s390_is_imm16(displace)) {                                          \
  31                         s390_brc (code, cond, displace);                                \
  32                 } else {                                                                \
  33                         s390_jcl (code, cond, displace);                                \
  34                 }                                                                       \
  35         } else {                                                                        \
  36                 mono_add_patch_info (cfg, code - cfg->native_code,                      \
  37                                      MONO_PATCH_INFO_LABEL, ins->inst_i0);              \
  38                 s390_jcl (code, cond, 0);                                               \
  39         }                                                                               \
  40 } else {                                                                                \
  41         if (ins->inst_true_bb->native_offset) {                                         \
  42                 int displace;                                                           \
  43                 displace = ((cfg->native_code +                                         \
  44                             ins->inst_true_bb->native_offset) - code) / 2;              \
  45                 if (s390_is_imm16(displace)) {                                          \
  46                         s390_brc (code, cond, displace);                                \
  47                 } else {                                                                \
  48                         s390_jcl (code, cond, displace);                                \
  49                 }                                                                       \
  50         } else {                                                                        \
  51                 mono_add_patch_info (cfg, code - cfg->native_code,                      \
  52                                      MONO_PATCH_INFO_BB, ins->inst_true_bb);            \
  53                 s390_jcl (code, cond, 0);                                               \
  54         }                                                                               \
  55 }                                                                                       \
  56 }
  57
  58 #define EMIT_UNCOND_BRANCH(ins)                                                         \
  59 {                                                                                       \
  60 if (ins->flags & MONO_INST_BRLABEL) {                                                   \
  61         if (ins->inst_i0->inst_c0) {                                                    \
  62                 int displace;                                                           \
  63                 displace = ((cfg->native_code + ins->inst_i0->inst_c0) - code) / 2;     \
  64                 if (s390_is_imm16(displace)) {                                          \
  65                         s390_brc (code, S390_CC_UN, displace);                          \
  66                 } else {                                                                \
  67                         s390_jcl (code, S390_CC_UN, displace);                          \
  68                 }                                                                       \
  69         } else {                                                                        \
  70                 mono_add_patch_info (cfg, code - cfg->native_code,                      \
  71                                      MONO_PATCH_INFO_LABEL, ins->inst_i0);              \
  72                 s390_jcl (code, S390_CC_UN, 0);                                         \
  73         }                                                                               \
  74 } else {                                                                                \
  75         if (ins->inst_target_bb->native_offset) {                                       \
  76                 int displace;                                                           \
  77                 displace = ((cfg->native_code +                                         \
  78                             ins->inst_target_bb->native_offset) - code) / 2;            \
  79                 if (s390_is_imm16(displace)) {                                          \
  80                         s390_brc (code, S390_CC_UN, displace);                          \
  81                 } else {                                                                \
  82                         s390_jcl (code, S390_CC_UN, displace);                          \
  83                 }                                                                       \
  84         } else {                                                                        \
  85                 mono_add_patch_info (cfg, code - cfg->native_code,                      \
  86                                      MONO_PATCH_INFO_BB, ins->inst_target_bb);          \
  87                 s390_jcl (code, S390_CC_UN, 0);                                         \
  88         }                                                                               \
  89 }                                                                                       \
  90 }
  91
  92 #define EMIT_COND_SYSTEM_EXCEPTION(cond,exc_name)                       \
  93         do {                                                            \
  94                 mono_add_patch_info (cfg, code - cfg->native_code,      \
  95                                     MONO_PATCH_INFO_EXC, exc_name);     \
  96                 s390_jcl (code, cond, 0);                               \
  97         } while (0);
  98
  99 #define CHECK_SRCDST_COM                                                \
 100         if (ins->dreg == ins->sreg2) {                                  \
 101                 src2 = ins->sreg1;                                      \
 102         } else {                                                        \
 103                 src2 = ins->sreg2;                                      \
 104                 if (ins->dreg != ins->sreg1) {                          \
 105                         s390_lr  (code, ins->dreg, ins->sreg1);         \
 106                 }                                                       \
 107         }
 108
 109 #define CHECK_SRCDST_NCOM                                               \
 110         if (ins->dreg == ins->sreg2) {                                  \
 111                 src2 = s390_r13;                                        \
 112                 s390_lr  (code, s390_r13, ins->sreg2);                  \
 113         } else {                                                        \
 114                 src2 = ins->sreg2;                                      \
 115         }                                                               \
 116         if (ins->dreg != ins->sreg1) {                                  \
 117                 s390_lr  (code, ins->dreg, ins->sreg1);                 \
 118         }
 119
 120 #define CHECK_SRCDST_COM_F                                              \
 121         if (ins->dreg == ins->sreg2) {                                  \
 122                 src2 = ins->sreg1;                                      \
 123         } else {                                                        \
 124                 src2 = ins->sreg2;                                      \
 125                 if (ins->dreg != ins->sreg1) {                          \
 126                         s390_ldr (code, ins->dreg, ins->sreg1);         \
 127                 }                                                       \
 128         }
 129
 130 #define CHECK_SRCDST_NCOM_F                                             \
 131         if (ins->dreg == ins->sreg2) {                                  \
 132                 src2 = s390_f15;                                        \
 133                 s390_ldr (code, s390_r13, ins->sreg2);                  \
 134         } else {                                                        \
 135                 src2 = ins->sreg2;                                      \
 136         }                                                               \
 137         if (ins->dreg != ins->sreg1) {                                  \
 138                 s390_ldr (code, ins->dreg, ins->sreg1);                 \
 139         }
 140
 141 #undef DEBUG
 142 #define DEBUG(a) if (cfg->verbose_level > 1) a
 143
 144 #define MAX_EXC 16
 145
 146 #define S390_TRACE_STACK_SIZE (5*sizeof(gint32)+3*sizeof(gdouble))
 147
 148 #define MAX (a, b) ((a) > (b) ? (a) : (b))
 149
 150 /*========================= End of Defines =========================*/
 151
 152 /*------------------------------------------------------------------*/
 153 /*                 I n c l u d e s                                  */
 154 /*------------------------------------------------------------------*/
 155
 156 #include "mini.h"
 157 #include <string.h>
 158
 159 #include <mono/metadata/appdomain.h>
 160 #include <mono/metadata/debug-helpers.h>
 161 #include <mono/metadata/profiler-private.h>
 162 #include <mono/utils/mono-math.h>
 163
 164 #include "mini-s390.h"
 165 #include "inssel.h"
 166 #include "cpu-s390.h"
 167
 168 /*========================= End of Includes ========================*/
 169
 170 /*------------------------------------------------------------------*/
 171 /*                 T y p e d e f s                                  */
 172 /*------------------------------------------------------------------*/
 173
 174 typedef struct {
 175         guint stack_size,
 176               local_size,
 177               code_size,
 178               parm_size,
 179               offset,
 180               offStruct,
 181               retStruct;
 182 } size_data;
 183
 184 /*------------------------------------------------------------------*/
 185 /* Used by the instrument_emit_epilog                               */
 186 /*------------------------------------------------------------------*/
 187
 188 enum {
 189         SAVE_NONE,
 190         SAVE_STRUCT,
 191         SAVE_ONE,
 192         SAVE_TWO,
 193         SAVE_R4,
 194         SAVE_R8
 195 };
 196
 197 typedef struct InstList InstList;
 198
 199 struct InstList {
 200         InstList *prev;
 201         InstList *next;
 202         MonoInst *data;
 203 };
 204
 205 enum {
 206         RegTypeGeneral,
 207         RegTypeBase,
 208         RegTypeFP,
 209         RegTypeStructByVal,
 210         RegTypeStructByAddr
 211 };
 212
 213 typedef struct {
 214         gint32  offset;         /* offset from caller's stack */
 215         gint32  offparm;        /* offset from callee's stack */
 216         guint16 vtsize;         /* in param area */
 217         guint8  reg;
 218         guint8  regtype;        /* See RegType* */
 219         guint32 size;           /* Size of structure used by RegTypeStructByVal */
 220 } ArgInfo;
 221
 222 typedef struct {
 223         int nargs;
 224         int lastgr;
 225         guint32 stack_usage;
 226         guint32 struct_ret;
 227         ArgInfo ret;
 228         ArgInfo sigCookie;
 229         ArgInfo args [1];
 230 } CallInfo;
 231
 232 typedef struct {
 233         gint32  gr[5];          /* R2-R6                            */
 234         gdouble fp[3];          /* F0-F2                            */
 235 } __attribute__ ((packed)) RegParm;
 236
 237 /*========================= End of Typedefs ========================*/
 238
 239 /*------------------------------------------------------------------*/
 240 /*                   P r o t o t y p e s                            */
 241 /*------------------------------------------------------------------*/
 242
 243 static void indent (int);
 244 static guint8 * backUpStackPtr(MonoCompile *, guint8 *, gint);
 245 static void decodeParm (MonoType *, void *, int);
 246 static void enter_method (MonoMethod *, RegParm *, char *);
 247 static void leave_method (MonoMethod *, ...);
 248 static gboolean is_regsize_var (MonoType *);
 249 static inline void add_general (guint *, size_data *, ArgInfo *, gboolean);
 250 static inline void add_stackParm (guint *, size_data *, ArgInfo *, gint);
 251 static inline void add_float (guint *, size_data *, ArgInfo *);
 252 static CallInfo * calculate_sizes (MonoMethodSignature *, size_data *, gboolean);
 253 static void peephole_pass (MonoCompile *, MonoBasicBlock *);
 254 static guchar * emit_float_to_int (MonoCompile *, guchar *, int, int, int, gboolean);
 255 static void mono_arch_break(void);
 256 gpointer mono_arch_get_lmf_addr (void);
 257 static guint8 * emit_load_volatile_registers(guint8 *, MonoCompile *);
 258 static void emit_sig_cookie (MonoCompile *, MonoCallInst *, CallInfo *, int);
 259
 260 /*========================= End of Prototypes ======================*/
 261
 262 /*------------------------------------------------------------------*/
 263 /*                 G l o b a l   V a r i a b l e s                  */
 264 /*------------------------------------------------------------------*/
 265
 266 int mono_exc_esp_offset = 0;
 267
 268 static int indent_level = 0;
 269
 270 static gboolean tls_offset_inited = FALSE;
 271
 272 static int appdomain_tls_offset = -1,
 273            lmf_tls_offset = -1,
 274            thread_tls_offset = -1;
 275
 276 pthread_key_t lmf_addr_key;
 277
 278 gboolean lmf_addr_key_inited = FALSE;
 279
 280 #if 0
 281
 282 extern __thread MonoDomain *tls_appdomain;
 283 extern __thread MonoThread *tls_current_object;
 284 extern __thread gpointer   mono_lmf_addr;
 285
 286 #endif
 287
 288 /*====================== End of Global Variables ===================*/
 289
 290 /*------------------------------------------------------------------*/
 291 /*                                                                  */
 292 /* Name         - mono_arch_regname                                 */
 293 /*                                                                  */
 294 /* Function     - Returns the name of the register specified by     */
 295 /*                the input parameter.                              */
 296 /*                                                                  */
 297 /*------------------------------------------------------------------*/
 298
 299 const char*
 300 mono_arch_regname (int reg) {
 301         static const char * rnames[] = {
 302                 "s390_r0", "s390_sp", "s390_r2", "s390_r3", "s390_r4",
 303                 "s390_r5", "s390_r6", "s390_r7", "s390_r8", "s390_r9",
 304                 "s390_r10", "s390_r11", "s390_r12", "s390_r13", "s390_r14",
 305                 "s390_r15"
 306         };
 307
 308         if (reg >= 0 && reg < 16)
 309                 return rnames [reg];
 310         else
 311                 return "unknown";
 312 }
 313
 314 /*========================= End of Function ========================*/
 315
 316 /*------------------------------------------------------------------*/
 317 /*                                                                  */
 318 /* Name         - mono_arch_fregname                                */
 319 /*                                                                  */
 320 /* Function     - Returns the name of the register specified by     */
 321 /*                the input parameter.                              */
 322 /*                                                                  */
 323 /*------------------------------------------------------------------*/
 324
 325 const char*
 326 mono_arch_fregname (int reg) {
 327         static const char * rnames[] = {
 328                 "s390_f0", "s390_f1", "s390_f2", "s390_f3", "s390_f4",
 329                 "s390_f5", "s390_f6", "s390_f7", "s390_f8", "s390_f9",
 330                 "s390_f10", "s390_f11", "s390_f12", "s390_f13", "s390_f14",
 331                 "s390_f15"
 332         };
 333
 334         if (reg >= 0 && reg < 16)
 335                 return rnames [reg];
 336         else
 337                 return "unknown";
 338 }
 339
 340 /*========================= End of Function ========================*/
 341
 342 /*------------------------------------------------------------------*/
 343 /*                                                                  */
 344 /* Name         - arch_get_argument_info                            */
 345 /*                                                                  */
 346 /* Function     - Gathers information on parameters such as size,   */
 347 /*                alignment, and padding. arg_info should be large  */
 348 /*                enough to hold param_count + 1 entries.           */
 349 /*                                                                  */
 350 /* Parameters   - @csig - Method signature                          */
 351 /*                @param_count - No. of parameters to consider      */
 352 /*                @arg_info - An array to store the result info     */
 353 /*                                                                  */
 354 /* Returns      - Size of the activation frame                      */
 355 /*                                                                  */
 356 /*------------------------------------------------------------------*/
 357
 358 int
 359 mono_arch_get_argument_info (MonoMethodSignature *csig,
 360                              int param_count,
 361                              MonoJitArgumentInfo *arg_info)
 362 {
 363         int k, frame_size = 0;
 364         int size, align, pad;
 365         int offset = 8;
 366
 367         if (MONO_TYPE_ISSTRUCT (csig->ret)) {
 368                 frame_size += sizeof (gpointer);
 369                 offset += 4;
 370         }
 371
 372         arg_info [0].offset = offset;
 373
 374         if (csig->hasthis) {
 375                 frame_size += sizeof (gpointer);
 376                 offset += 4;
 377         }
 378
 379         arg_info [0].size = frame_size;
 380
 381         for (k = 0; k < param_count; k++) {
 382
 383                 if (csig->pinvoke)
 384                         size = mono_type_native_stack_size (csig->params [k], &align);
 385                 else
 386                         size = mini_type_stack_size (NULL, csig->params [k], &align);
 387
 388                 frame_size += pad = (align - (frame_size & (align - 1))) & (align - 1);
 389                 arg_info [k].pad = pad;
 390                 frame_size += size;
 391                 arg_info [k + 1].pad = 0;
 392                 arg_info [k + 1].size = size;
 393                 offset += pad;
 394                 arg_info [k + 1].offset = offset;
 395                 offset += size;
 396         }
 397
 398         align = MONO_ARCH_FRAME_ALIGNMENT;
 399         frame_size += pad = (align - (frame_size & (align - 1))) & (align - 1);
 400         arg_info [k].pad = pad;
 401
 402         return frame_size;
 403 }
 404
 405 /*========================= End of Function ========================*/
 406
 407 /*------------------------------------------------------------------*/
 408 /*                                                                  */
 409 /* Name         - retFitsInReg.                                     */
 410 /*                                                                  */
 411 /* Function     - Determines if a value can be returned in one or   */
 412 /*                two registers.                                    */
 413 /*                                                                  */
 414 /*------------------------------------------------------------------*/
 415
 416 static inline gboolean
 417 retFitsInReg(guint32 size)
 418 {
 419         switch (size) {
 420                 case 0:
 421                 case 1:
 422                 case 2:
 423                 case 4:
 424                 case 8:
 425                         return (TRUE);
 426                 break;
 427                 default:
 428                         return (FALSE);
 429         }
 430 }
 431
 432 /*========================= End of Function ========================*/
 433
 434 /*------------------------------------------------------------------*/
 435 /*                                                                  */
 436 /* Name         - backStackPtr.                                     */
 437 /*                                                                  */
 438 /* Function     - Restore Stack Pointer to previous frame.          */
 439 /*                                                                  */
 440 /*------------------------------------------------------------------*/
 441
 442 static inline guint8 *
 443 backUpStackPtr(MonoCompile *cfg, guint8 *code, gint framePtr)
 444 {
 445         int stackSize = cfg->stack_usage;
 446
 447         if (s390_is_uimm16 (cfg->stack_usage)) {
 448                 s390_ahi  (code, framePtr, cfg->stack_usage);
 449         } else {
 450                 while (stackSize > 32767) {
 451                         s390_ahi  (code, framePtr, 32767);
 452                         stackSize -= 32767;
 453                 }
 454                 s390_ahi  (code, framePtr, stackSize);
 455         }
 456         return (code);
 457 }
 458
 459 /*========================= End of Function ========================*/
 460
 461 /*------------------------------------------------------------------*/
 462 /*                                                                  */
 463 /* Name         - indent                                            */
 464 /*                                                                  */
 465 /* Function     - Perform nice indenting to current level           */
 466 /*                                                                  */
 467 /*------------------------------------------------------------------*/
 468
 469 static void
 470 indent (int diff) {
 471         int v;
 472         if (diff < 0)
 473                 indent_level += diff;
 474         v = indent_level;
 475         printf("[%3d] ",v);
 476         while (v-- > 0) {
 477                 printf (". ");
 478         }
 479         if (diff > 0)
 480                 indent_level += diff;
 481 }
 482
 483 /*========================= End of Function ========================*/
 484
 485 /*------------------------------------------------------------------*/
 486 /*                                                                  */
 487 /* Name         - decodeParm                                        */
 488 /*                                                                  */
 489 /* Function     - Decode a parameter for the trace.                 */
 490 /*                                                                  */
 491 /*------------------------------------------------------------------*/
 492
 493 static void
 494 decodeParm(MonoType *type, void *curParm, int size)
 495 {
 496         guint32 simpleType;
 497
 498         if (type->byref) {
 499                 printf("[BYREF:%p], ", *((char **) curParm));
 500         } else {
 501                 simpleType = mono_type_get_underlying_type(type)->type;
 502 enum_parmtype:
 503                 switch (simpleType) {
 504                         case MONO_TYPE_I :
 505                                 printf ("[INTPTR:%p], ", *((int **) curParm));
 506                                 break;
 507                         case MONO_TYPE_U :
 508                                 printf ("[UINTPTR:%p], ", *((int **) curParm));
 509                                 break;
 510                         case MONO_TYPE_BOOLEAN :
 511                                 printf ("[BOOL:%d], ", *((int *) curParm));
 512                                 break;
 513                         case MONO_TYPE_CHAR :
 514                                 printf ("[CHAR:%c], ", *((int *) curParm));
 515                                 break;
 516                         case MONO_TYPE_I1 :
 517                                 printf ("[INT1:%d], ", *((int *) curParm));
 518                                 break;
 519                         case MONO_TYPE_I2 :
 520                                 printf ("[INT2:%d], ", *((int *) curParm));
 521                                 break;
 522                         case MONO_TYPE_I4 :
 523                                 printf ("[INT4:%d], ", *((int *) curParm));
 524                                 break;
 525                         case MONO_TYPE_U1 :
 526                                 printf ("[UINT1:%u], ", *((unsigned int *) curParm));
 527                                 break;
 528                         case MONO_TYPE_U2 :
 529                                 printf ("[UINT2:%u], ", *((guint16 *) curParm));
 530                                 break;
 531                         case MONO_TYPE_U4 :
 532                                 printf ("[UINT4:%u], ", *((guint32 *) curParm));
 533                                 break;
 534                         case MONO_TYPE_U8 :
 535                                 printf ("[UINT8:%llu], ", *((guint64 *) curParm));
 536                                 break;
 537                         case MONO_TYPE_STRING : {
 538                                 MonoString *s = *((MonoString **) curParm);
 539                                 if (s) {
 540                                         g_assert (((MonoObject *) s)->vtable->klass == mono_defaults.string_class);
 541                                         printf("[STRING:%p:%s], ", s, mono_string_to_utf8(s));
 542                                 } else {
 543                                         printf("[STRING:null], ");
 544                                 }
 545                                 break;
 546                         }
 547                         case MONO_TYPE_CLASS :
 548                         case MONO_TYPE_OBJECT : {
 549                                 MonoObject *obj = *((MonoObject **) curParm);
 550                                 MonoClass *class;
 551                                 if ((obj) && (obj->vtable)) {
 552                                         printf("[CLASS/OBJ:");
 553                                         class = obj->vtable->klass;
 554                                         printf("%p [%p] ",obj,curParm);
 555 //                                      if (class == mono_defaults.string_class) {
 556 //                                              printf("[STRING:%p:%s]",
 557 //                                                     *obj, mono_string_to_utf8 (obj));
 558 //                                      } else if (class == mono_defaults.int32_class) {
 559 //                                              printf("[INT32:%p:%d]",
 560 //                                                      obj, *(gint32 *)((char *)obj + sizeof (MonoObject)));
 561 //                                      } else
 562 //                                              printf("[%s.%s:%p]",
 563 //                                                     class->name_space, class->name, obj);
 564                                         printf("], ");
 565                                 } else {
 566                                         printf("[OBJECT:null], ");
 567                                 }
 568                                 break;
 569                         }
 570                         case MONO_TYPE_PTR :
 571                                 printf("[PTR:%p], ", *((gpointer **) (curParm)));
 572                                 break;
 573                         case MONO_TYPE_FNPTR :
 574                                 printf("[FNPTR:%p], ", *((gpointer **) (curParm)));
 575                                 break;
 576                         case MONO_TYPE_ARRAY :
 577                                 printf("[ARRAY:%p], ", *((gpointer **) (curParm)));
 578                                 break;
 579                         case MONO_TYPE_SZARRAY :
 580                                 printf("[SZARRAY:%p], ", *((gpointer **) (curParm)));
 581                                 break;
 582                         case MONO_TYPE_I8 :
 583                                 printf("[INT8:%lld], ", *((gint64 *) (curParm)));
 584                                 break;
 585                         case MONO_TYPE_R4 :
 586                                 printf("[FLOAT4:%g], ", *((double *) (curParm)));
 587                                 break;
 588                         case MONO_TYPE_R8 :
 589                                 printf("[FLOAT8:%g], ", *((double *) (curParm)));
 590                                 break;
 591                         case MONO_TYPE_VALUETYPE : {
 592                                 int i;
 593                                 MonoMarshalType *info;
 594
 595                                 if (type->data.klass->enumtype) {
 596                                         simpleType = type->data.klass->enum_basetype->type;
 597                                         printf("{VALUETYPE} - ");
 598                                         goto enum_parmtype;
 599                                 }
 600
 601                                 info = mono_marshal_load_type_info (type->data.klass);
 602
 603                                 if ((info->native_size == sizeof(float)) &&
 604                                     (info->num_fields  == 1) &&
 605                                     (info->fields[0].field->type->type == MONO_TYPE_R4)) {
 606                                                 printf("[FLOAT4:%f], ", *((float *) (curParm)));
 607                                         break;
 608                                 }
 609
 610                                 if ((info->native_size == sizeof(double)) &&
 611                                     (info->num_fields  == 1) &&
 612                                     (info->fields[0].field->type->type == MONO_TYPE_R8)) {
 613                                         printf("[FLOAT8:%g], ", *((double *) (curParm)));
 614                                         break;
 615                                 }
 616
 617                                 printf("[VALUETYPE:");
 618                                 for (i = 0; i < size; i++)
 619                                         printf("%02x,", *((guint8 *)curParm+i));
 620                                 printf("]");
 621                                 break;
 622                         }
 623                         case MONO_TYPE_TYPEDBYREF: {
 624                                 int i;
 625                                 printf("[TYPEDBYREF:");
 626                                 for (i = 0; i < size; i++)
 627                                         printf("%02x,", *((guint8 *)curParm+i));
 628                                 printf("]");
 629                                 break;
 630                         }
 631                         default :
 632                                 printf("[?? - %d], ",simpleType);
 633                 }
 634         }
 635 }
 636
 637 /*========================= End of Function ========================*/
 638
 639 static int lc = 0;
 640 /*------------------------------------------------------------------*/
 641 /*                                                                  */
 642 /* Name         - enter_method                                      */
 643 /*                                                                  */
 644 /* Function     - Perform tracing of the entry to the current       */
 645 /*                method.                                           */
 646 /*                                                                  */
 647 /*------------------------------------------------------------------*/
 648
 649 static void
 650 enter_method (MonoMethod *method, RegParm *rParm, char *sp)
 651 {
 652         int i, oParm = 0, iParm = 0;
 653         MonoObject *obj;
 654         MonoMethodSignature *sig;
 655         char *fname;
 656         guint32 ip;
 657         CallInfo *cinfo;
 658         ArgInfo *ainfo;
 659         size_data sz;
 660         void *curParm;
 661
 662         fname = mono_method_full_name (method, TRUE);
 663         indent (1);
 664         printf ("ENTER: %s(", fname);
 665         g_free (fname);
 666
 667         ip  = (*(guint32 *) (sp+S390_RET_ADDR_OFFSET)) & 0x7fffffff;
 668         printf (") ip: %p sp: %p - ", (gpointer) ip, sp);
 669
 670         if (rParm == NULL)
 671                 return;
 672
 673         sig = mono_method_signature (method);
 674
 675         cinfo = calculate_sizes (sig, &sz, sig->pinvoke);
 676
 677         if (cinfo->struct_ret) {
 678                 printf ("[STRUCTRET:%p], ", (gpointer) rParm->gr[0]);
 679                 iParm = 1;
 680         }
 681
 682         if (sig->hasthis) {
 683                 gpointer *this = (gpointer *) rParm->gr[iParm];
 684                 obj = (MonoObject *) this;
 685                 if (method->klass->valuetype) {
 686                         if (obj) {
 687                                 printf("this:[value:%p:%08x], ",
 688                                        this, *((guint32 *)(this+sizeof(MonoObject))));
 689                         } else
 690                                 printf ("this:[NULL], ");
 691                 } else {
 692                         if (obj) {
 693 //                              class = obj->vtable->klass;
 694 //                              if (class == mono_defaults.string_class) {
 695 //                                      printf ("this:[STRING:%p:%s], ",
 696 //                                              obj, mono_string_to_utf8 ((MonoString *)obj));
 697 //                              } else {
 698 //                                      printf ("this:%p[%s.%s], ",
 699 //                                              obj, class->name_space, class->name);
 700 //                              }
 701 printf("this:%p, ",obj);
 702                         } else
 703                                 printf ("this:NULL, ");
 704                 }
 705                 oParm++;
 706         }
 707
 708         for (i = 0; i < sig->param_count; ++i) {
 709                 ainfo = &cinfo->args[i + oParm];
 710                 switch (ainfo->regtype) {
 711                         case RegTypeGeneral :
 712                                 decodeParm(sig->params[i], &(rParm->gr[ainfo->reg-2]), ainfo->size);
 713                                 break;
 714                         case RegTypeFP :
 715                                 decodeParm(sig->params[i], &(rParm->fp[ainfo->reg]), ainfo->size);
 716                                 break;
 717                         case RegTypeBase :
 718                                 decodeParm(sig->params[i], sp+ainfo->offset, ainfo->size);
 719                                 break;
 720                         case RegTypeStructByVal :
 721                                 if (ainfo->reg != STK_BASE)
 722                                         curParm = &(rParm->gr[ainfo->reg-2]);
 723                                 else
 724                                         curParm = sp+ainfo->offset;
 725
 726                                 if (retFitsInReg (ainfo->vtsize))
 727                                         decodeParm(sig->params[i],
 728                                                    curParm,
 729                                                    ainfo->size);
 730                                 else
 731                                         decodeParm(sig->params[i],
 732                                                    *((char **) curParm),
 733                                                    ainfo->vtsize);
 734                                 break;
 735                         case RegTypeStructByAddr :
 736                                 if (ainfo->reg != STK_BASE)
 737                                         curParm = &(rParm->gr[ainfo->reg-2]);
 738                                 else
 739                                         curParm = sp+ainfo->offset;
 740
 741                                 decodeParm(sig->params[i],
 742                                            *((char **) curParm),
 743                                            ainfo->vtsize);
 744                                 break;
 745
 746                         default :
 747                                 printf("???, ");
 748                 }
 749         }
 750         printf("\n");
 751         g_free(cinfo);
 752 }
 753
 754 /*========================= End of Function ========================*/
 755
 756 /*------------------------------------------------------------------*/
 757 /*                                                                  */
 758 /* Name         - leave_method                                      */
 759 /*                                                                  */
 760 /* Function     -                                                   */
 761 /*                                                                  */
 762 /*------------------------------------------------------------------*/
 763
 764 static void
 765 leave_method (MonoMethod *method, ...)
 766 {
 767         MonoType *type;
 768         char *fname;
 769         guint32 ip;
 770         va_list ap;
 771
 772         va_start(ap, method);
 773
 774         fname = mono_method_full_name (method, TRUE);
 775         indent (-1);
 776         printf ("LEAVE: %s", fname);
 777         g_free (fname);
 778
 779         type = mono_method_signature (method)->ret;
 780
 781 handle_enum:
 782         switch (type->type) {
 783         case MONO_TYPE_VOID:
 784                 break;
 785         case MONO_TYPE_BOOLEAN: {
 786                 int val = va_arg (ap, int);
 787                 if (val)
 788                         printf ("[TRUE:%d]", val);
 789                 else
 790                         printf ("[FALSE]");
 791
 792                 break;
 793         }
 794         case MONO_TYPE_CHAR: {
 795                 int val = va_arg (ap, int);
 796                 printf ("[CHAR:%d]", val);
 797                 break;
 798         }
 799         case MONO_TYPE_I1: {
 800                 int val = va_arg (ap, int);
 801                 printf ("[INT1:%d]", val);
 802                 break;
 803         }
 804         case MONO_TYPE_U1: {
 805                 int val = va_arg (ap, int);
 806                 printf ("[UINT1:%d]", val);
 807                 break;
 808         }
 809         case MONO_TYPE_I2: {
 810                 int val = va_arg (ap, int);
 811                 printf ("[INT2:%d]", val);
 812                 break;
 813         }
 814         case MONO_TYPE_U2: {
 815                 int val = va_arg (ap, int);
 816                 printf ("[UINT2:%d]", val);
 817                 break;
 818         }
 819         case MONO_TYPE_I4: {
 820                 int val = va_arg (ap, int);
 821                 printf ("[INT4:%d]", val);
 822                 break;
 823         }
 824         case MONO_TYPE_U4: {
 825                 int val = va_arg (ap, int);
 826                 printf ("[UINT4:%d]", val);
 827                 break;
 828         }
 829         case MONO_TYPE_I: {
 830                 int val = va_arg (ap, int);
 831                 printf ("[INT:%d]", val);
 832                 printf("]");
 833                 break;
 834         }
 835         case MONO_TYPE_U: {
 836                 int val = va_arg (ap, int);
 837                 printf ("[UINT:%d]", val);
 838                 printf("]");
 839                 break;
 840         }
 841         case MONO_TYPE_STRING: {
 842                 MonoString *s = va_arg (ap, MonoString *);
 843 ;
 844                 if (s) {
 845                         g_assert (((MonoObject *)s)->vtable->klass == mono_defaults.string_class);
 846                         printf ("[STRING:%p:%s]", s, mono_string_to_utf8 (s));
 847                 } else
 848                         printf ("[STRING:null], ");
 849                 break;
 850         }
 851         case MONO_TYPE_CLASS:
 852         case MONO_TYPE_OBJECT: {
 853                 MonoObject *o = va_arg (ap, MonoObject *);
 854
 855 //              if ((o) && (o->vtable)) {
 856 //                      if (o->vtable->klass == mono_defaults.boolean_class) {
 857 //                              printf ("[BOOLEAN:%p:%d]", o, *((guint8 *)o + sizeof (MonoObject)));
 858 //                      } else if  (o->vtable->klass == mono_defaults.int32_class) {
 859 //                              printf ("[INT32:%p:%d]", o, *((gint32 *)((char *)o + sizeof (MonoObject))));
 860 //                      } else if  (o->vtable->klass == mono_defaults.int64_class) {
 861 //                              printf ("[INT64:%p:%lld]", o, *((gint64 *)((char *)o + sizeof (MonoObject))));
 862 //                      } else
 863 //                              printf ("[%s.%s:%p]", o->vtable->klass->name_space, o->vtable->klass->name, o);
 864 //              } else
 865                         printf ("[OBJECT:%p]", o);
 866
 867                 break;
 868         }
 869         case MONO_TYPE_PTR:
 870         case MONO_TYPE_FNPTR:
 871         case MONO_TYPE_ARRAY:
 872         case MONO_TYPE_SZARRAY: {
 873                 gpointer p = va_arg (ap, gpointer);
 874                 printf ("[result=%p]", p);
 875                 break;
 876         }
 877         case MONO_TYPE_I8: {
 878                 gint64 l =  va_arg (ap, gint64);
 879                 printf ("[LONG:%lld]", l);
 880                 break;
 881         }
 882         case MONO_TYPE_U8: {
 883                 guint64 l =  va_arg (ap, guint64);
 884                 printf ("[ULONG:%llu]", l);
 885                 break;
 886         }
 887         case MONO_TYPE_R4: {
 888                 double f;
 889                 f = va_arg (ap, double);
 890                 printf ("[FLOAT4:%g]\n", f);
 891                 break;
 892         }
 893         case MONO_TYPE_R8: {
 894                 double f = va_arg (ap, double);
 895                 printf ("[FLOAT8:%g]\n", f);
 896                 break;
 897         }
 898         case MONO_TYPE_VALUETYPE: {
 899                 MonoMarshalType *info;
 900                 if (type->data.klass->enumtype) {
 901                         type = type->data.klass->enum_basetype;
 902                         goto handle_enum;
 903                 } else {
 904                         guint8 *p = va_arg (ap, gpointer);
 905                         int j, size, align;
 906
 907                         info = mono_marshal_load_type_info (type->data.klass);
 908
 909                         if ((info->native_size == sizeof(float)) &&
 910                             (info->num_fields  == 1) &&
 911                             (info->fields[0].field->type->type == MONO_TYPE_R4)) {
 912                                 double f = va_arg (ap, double);
 913                                 printf("[FLOAT4:%g]\n", (double) f);
 914                                 break;
 915                         }
 916
 917                         if ((info->native_size == sizeof(double)) &&
 918                             (info->num_fields  == 1) &&
 919                             (info->fields[0].field->type->type == MONO_TYPE_R8)) {
 920                                 double f = va_arg (ap, double);
 921                                 printf("[FLOAT8:%g]\n", f);
 922                                 break;
 923                         }
 924
 925                         size = mono_type_size (type, &align);
 926                         switch (size) {
 927                         case 1:
 928                         case 2:
 929                         case 4:
 930                         case 8:
 931                                 printf ("[");
 932                                 for (j = 0; p && j < size; j++)
 933                                         printf ("%02x,", p [j]);
 934                                 printf ("]\n");
 935                                 break;
 936                         default:
 937                                 printf ("[VALUERET]\n");
 938                         }
 939                 }
 940                 break;
 941         }
 942         case MONO_TYPE_TYPEDBYREF: {
 943                 guint8 *p = va_arg (ap, gpointer);
 944                 int j, size, align;
 945                 size = mono_type_size (type, &align);
 946                 switch (size) {
 947                 case 1:
 948                 case 2:
 949                 case 4:
 950                 case 8:
 951                         printf ("[");
 952                         for (j = 0; p && j < size; j++)
 953                                 printf ("%02x,", p [j]);
 954                         printf ("]\n");
 955                         break;
 956                 default:
 957                         printf ("[TYPEDBYREF]\n");
 958                 }
 959         }
 960                 break;
 961         default:
 962                 printf ("(unknown return type %x)",
 963                         mono_method_signature (method)->ret->type);
 964         }
 965
 966         ip = ((gint32) __builtin_return_address (0)) & 0x7fffffff;
 967         printf (" ip: %p\n", (gpointer) ip);
 968 }
 969
 970 /*========================= End of Function ========================*/
 971
 972 /*------------------------------------------------------------------*/
 973 /*                                                                  */
 974 /* Name         - mono_arch_cpu_init                                */
 975 /*                                                                  */
 976 /* Function     - Perform CPU specific initialization to execute    */
 977 /*                managed code.                                     */
 978 /*                                                                  */
 979 /*------------------------------------------------------------------*/
 980
 981 void
 982 mono_arch_cpu_init (void)
 983 {
 984         guint mode = 1;
 985
 986         /*--------------------------------------*/
 987         /* Set default rounding mode for FP     */
 988         /*--------------------------------------*/
 989         __asm__ ("SRNM\t%0\n\t"
 990                 : : "m" (mode));
 991 }
 992
 993 /*========================= End of Function ========================*/
 994
 995
 996 /*
 997  * Initialize architecture specific code.
 998  */
 999 void
1000 mono_arch_init (void)
1001 {
1002 }
1003
1004 /*
1005  * Cleanup architecture specific code.
1006  */
1007 void
1008 mono_arch_cleanup (void)
1009 {
1010 }
1011
1012 /*------------------------------------------------------------------*/
1013 /*                                                                  */
1014 /* Name         - mono_arch_cpu_optimizazions                       */
1015 /*                                                                  */
1016 /* Function     - Returns the optimizations supported on this CPU   */
1017 /*                                                                  */
1018 /*------------------------------------------------------------------*/
1019
1020 guint32
1021 mono_arch_cpu_optimizazions (guint32 *exclude_mask)
1022 {
1023         guint32 opts = 0;
1024
1025         /*----------------------------------------------------------*/
1026         /* no s390-specific optimizations yet                       */
1027         /*----------------------------------------------------------*/
1028         *exclude_mask = MONO_OPT_INLINE|MONO_OPT_LINEARS;
1029 //      *exclude_mask = MONO_OPT_INLINE;
1030         return opts;
1031 }
1032
1033 /*========================= End of Function ========================*/
1034
1035 /*------------------------------------------------------------------*/
1036 /*                                                                  */
1037 /* Name         -                                                   */
1038 /*                                                                  */
1039 /* Function     -                                                   */
1040 /*                                                                  */
1041 /*------------------------------------------------------------------*/
1042
1043 static gboolean
1044 is_regsize_var (MonoType *t) {
1045         if (t->byref)
1046                 return TRUE;
1047         switch (mono_type_get_underlying_type (t)->type) {
1048         case MONO_TYPE_I4:
1049         case MONO_TYPE_U4:
1050         case MONO_TYPE_I:
1051         case MONO_TYPE_U:
1052         case MONO_TYPE_PTR:
1053         case MONO_TYPE_FNPTR:
1054                 return TRUE;
1055         case MONO_TYPE_OBJECT:
1056         case MONO_TYPE_STRING:
1057         case MONO_TYPE_CLASS:
1058         case MONO_TYPE_SZARRAY:
1059         case MONO_TYPE_ARRAY:
1060                 return FALSE;
1061         case MONO_TYPE_VALUETYPE:
1062                 if (t->data.klass->enumtype)
1063                         return is_regsize_var (t->data.klass->enum_basetype);
1064                 return FALSE;
1065         }
1066         return FALSE;
1067 }
1068
1069 /*========================= End of Function ========================*/
1070
1071 /*------------------------------------------------------------------*/
1072 /*                                                                  */
1073 /* Name         - mono_arch_get_allocatable_int_vars                */
1074 /*                                                                  */
1075 /* Function     -                                                   */
1076 /*                                                                  */
1077 /*------------------------------------------------------------------*/
1078
1079 GList *
1080 mono_arch_get_allocatable_int_vars (MonoCompile *cfg)
1081 {
1082         GList *vars = NULL;
1083         int i;
1084
1085         for (i = 0; i < cfg->num_varinfo; i++) {
1086                 MonoInst *ins = cfg->varinfo [i];
1087                 MonoMethodVar *vmv = MONO_VARINFO (cfg, i);
1088
1089                 /* unused vars */
1090                 if (vmv->range.first_use.abs_pos >= vmv->range.last_use.abs_pos)
1091                         continue;
1092
1093                 if (ins->flags & (MONO_INST_VOLATILE|MONO_INST_INDIRECT) ||
1094                     (ins->opcode != OP_LOCAL && ins->opcode != OP_ARG))
1095                         continue;
1096
1097                 /* we can only allocate 32 bit values */
1098                 if (is_regsize_var (ins->inst_vtype)) {
1099                         g_assert (MONO_VARINFO (cfg, i)->reg == -1);
1100                         g_assert (i == vmv->idx);
1101                         vars = mono_varlist_insert_sorted (cfg, vars, vmv, FALSE);
1102                 }
1103         }
1104
1105         return vars;
1106 }
1107
1108 /*========================= End of Function ========================*/
1109
1110 /*------------------------------------------------------------------*/
1111 /*                                                                  */
1112 /* Name         - mono_arch_global_int_regs                         */
1113 /*                                                                  */
1114 /* Function     - Return a list of usable integer registers.        */
1115 /*                                                                  */
1116 /*------------------------------------------------------------------*/
1117
1118 GList *
1119 mono_arch_get_global_int_regs (MonoCompile *cfg)
1120 {
1121         GList *regs = NULL;
1122         MonoMethodHeader *header;
1123         int i, top = 13;
1124
1125         header = mono_method_get_header (cfg->method);
1126         if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
1127                 cfg->frame_reg = s390_r11;
1128
1129         for (i = 8; i < top; ++i) {
1130                 if (cfg->frame_reg != i)
1131                         regs = g_list_prepend (regs, GUINT_TO_POINTER (i));
1132         }
1133
1134         return regs;
1135 }
1136
1137 /*========================= End of Function ========================*/
1138
1139 /*------------------------------------------------------------------*/
1140 /*                                                                  */
1141 /* Name         -  mono_arch_flush_icache                           */
1142 /*                                                                  */
1143 /* Function     -  Flush the CPU icache.                            */
1144 /*                                                                  */
1145 /*------------------------------------------------------------------*/
1146
1147 void
1148 mono_arch_flush_icache (guint8 *code, gint size)
1149 {
1150 }
1151
1152 /*========================= End of Function ========================*/
1153
1154 /*------------------------------------------------------------------*/
1155 /*                                                                  */
1156 /* Name         - add_general                                       */
1157 /*                                                                  */
1158 /* Function     - Determine code and stack size incremements for a  */
1159 /*                parameter.                                        */
1160 /*                                                                  */
1161 /*------------------------------------------------------------------*/
1162
1163 static void inline
1164 add_general (guint *gr, size_data *sz, ArgInfo *ainfo, gboolean simple)
1165 {
1166         int disp;
1167
1168         if (simple) {
1169                 if (*gr > S390_LAST_ARG_REG) {
1170                         sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1171                         ainfo->offset   = sz->stack_size;
1172                         ainfo->reg      = STK_BASE;
1173                         ainfo->regtype  = RegTypeBase;
1174                         sz->stack_size += sizeof(int);
1175                         sz->local_size += sizeof(int);
1176                         sz->offStruct  += sizeof(int);
1177                         sz->code_size  += 12;
1178                 } else {
1179                         ainfo->reg      = *gr;
1180                         sz->code_size  += 8;
1181                 }
1182         } else {
1183                 if (*gr > S390_LAST_ARG_REG - 1) {
1184                         disp            = sz->stack_size;
1185                         sz->stack_size  = S390_ALIGN(sz->stack_size, S390_STACK_ALIGNMENT);
1186                         disp            = sz->stack_size - disp;
1187                         ainfo->offset   = sz->stack_size;
1188                         ainfo->reg      = STK_BASE;
1189                         ainfo->regtype  = RegTypeBase;
1190                         sz->stack_size += sizeof(long long);
1191                         sz->local_size += (sizeof(long long) + disp);
1192                         sz->offStruct  += (sizeof(long long) + disp);
1193                         sz->code_size  += 10;
1194                 } else {
1195                         ainfo->reg      = *gr;
1196                         sz->code_size  += 8;
1197                 }
1198                 (*gr) ++;
1199         }
1200         (*gr) ++;
1201 }
1202
1203 /*========================= End of Function ========================*/
1204
1205 /*------------------------------------------------------------------*/
1206 /*                                                                  */
1207 /* Name         - add_stackParm                                     */
1208 /*                                                                  */
1209 /* Function     - Determine code and stack size incremements for a  */
1210 /*                parameter.                                        */
1211 /*                                                                  */
1212 /*------------------------------------------------------------------*/
1213
1214 static void inline
1215 add_stackParm (guint *gr, size_data *sz, ArgInfo *ainfo, gint size)
1216 {
1217         if (*gr > S390_LAST_ARG_REG) {
1218                 sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1219                 ainfo->reg      = STK_BASE;
1220                 sz->parm_size  += sizeof(gpointer);
1221                 sz->offStruct  += sizeof(gpointer);
1222         } else {
1223                 ainfo->reg      = *gr;
1224         }
1225         (*gr) ++;
1226         ainfo->offset   = sz->stack_size;
1227         ainfo->offparm  = sz->offset;
1228         sz->offset      = S390_ALIGN(sz->offset+size, sizeof(long));
1229         ainfo->size     = size;
1230         ainfo->regtype  = RegTypeStructByAddr;
1231         ainfo->vtsize   = size;
1232         sz->parm_size  += size;
1233 }
1234
1235 /*========================= End of Function ========================*/
1236
1237 /*------------------------------------------------------------------*/
1238 /*                                                                  */
1239 /* Name         - add_float                                         */
1240 /*                                                                  */
1241 /* Function     - Determine code and stack size incremements for a  */
1242 /*                float parameter.                                  */
1243 /*                                                                  */
1244 /*------------------------------------------------------------------*/
1245
1246 static void inline
1247 add_float (guint *fr,  size_data *sz, ArgInfo *ainfo)
1248 {
1249         if ((*fr) <= S390_LAST_FPARG_REG) {
1250                 ainfo->regtype = RegTypeFP;
1251                 ainfo->reg     = *fr;
1252                 sz->code_size += 4;
1253                 (*fr) += 2;
1254         }
1255         else {
1256                 ainfo->offset   = sz->stack_size;
1257                 ainfo->reg      = STK_BASE;
1258                 ainfo->regtype  = RegTypeBase;
1259                 sz->code_size  += 4;
1260                 sz->stack_size += ainfo->size;
1261                 sz->local_size += ainfo->size;
1262                 sz->offStruct  += ainfo->size;
1263         }
1264 }
1265
1266 /*========================= End of Function ========================*/
1267
1268 /*------------------------------------------------------------------*/
1269 /*                                                                  */
1270 /* Name         - calculate_sizes                                   */
1271 /*                                                                  */
1272 /* Function     - Determine the amount of space required for code   */
1273 /*                and stack. In addition determine starting points  */
1274 /*                for stack-based parameters, and area for struct-  */
1275 /*                ures being returned on the stack.                 */
1276 /*                                                                  */
1277 /*------------------------------------------------------------------*/
1278
1279 static CallInfo *
1280 calculate_sizes (MonoMethodSignature *sig, size_data *sz,
1281                  gboolean string_ctor)
1282 {
1283         guint i, fr, gr, size;
1284         int nParm = sig->hasthis + sig->param_count;
1285         guint32 simpletype, align;
1286         CallInfo *cinfo = g_malloc0 (sizeof (CallInfo) + sizeof (ArgInfo) * nParm);
1287
1288         fr                = 0;
1289         gr                = s390_r2;
1290         nParm             = 0;
1291         cinfo->struct_ret = 0;
1292         sz->offset        = 0;
1293         sz->offStruct     = S390_MINIMAL_STACK_SIZE;
1294         sz->retStruct     = 0;
1295         sz->stack_size    = S390_MINIMAL_STACK_SIZE;
1296         sz->code_size     = 0;
1297         sz->parm_size     = 0;
1298         sz->local_size    = 0;
1299
1300         /*----------------------------------------------------------*/
1301         /* We determine the size of the return code/stack in case we*/
1302         /* need to reserve a register to be used to address a stack */
1303         /* area that the callee will use.                           */
1304         /*----------------------------------------------------------*/
1305
1306         simpletype = mono_type_get_underlying_type (sig->ret)->type;
1307 enum_retvalue:
1308         switch (simpletype) {
1309                 case MONO_TYPE_BOOLEAN:
1310                 case MONO_TYPE_I1:
1311                 case MONO_TYPE_U1:
1312                 case MONO_TYPE_I2:
1313                 case MONO_TYPE_U2:
1314                 case MONO_TYPE_CHAR:
1315                 case MONO_TYPE_I4:
1316                 case MONO_TYPE_U4:
1317                 case MONO_TYPE_I:
1318                 case MONO_TYPE_U:
1319                 case MONO_TYPE_CLASS:
1320                 case MONO_TYPE_OBJECT:
1321                 case MONO_TYPE_SZARRAY:
1322                 case MONO_TYPE_ARRAY:
1323                 case MONO_TYPE_PTR:
1324                 case MONO_TYPE_FNPTR:
1325                 case MONO_TYPE_STRING:
1326                         cinfo->ret.reg = s390_r2;
1327                         sz->code_size += 4;
1328                         break;
1329                 case MONO_TYPE_R4:
1330                 case MONO_TYPE_R8:
1331                         cinfo->ret.reg = s390_f0;
1332                         sz->code_size += 4;
1333                         break;
1334                 case MONO_TYPE_I8:
1335                 case MONO_TYPE_U8:
1336                         cinfo->ret.reg = s390_r2;
1337                         sz->code_size += 4;
1338                         break;
1339                 case MONO_TYPE_GENERICINST:
1340                         if (!mono_type_generic_inst_is_valuetype (sig->ret)) {
1341                                 cinfo->ret.reg = s390_r2;
1342                                 sz->code_size += 4;
1343                                 break;
1344                         }
1345                         /* Fall through */
1346                 case MONO_TYPE_VALUETYPE: {
1347                         MonoClass *klass = mono_class_from_mono_type (sig->ret);
1348                         if (klass->enumtype) {
1349                                 simpletype = klass->enum_basetype->type;
1350                                 goto enum_retvalue;
1351                         }
1352                         if (sig->pinvoke)
1353                                 size = mono_class_native_size (klass, &align);
1354                         else
1355                                 size = mono_class_value_size (klass, &align);
1356
1357                         cinfo->ret.reg    = s390_r2;
1358                         cinfo->struct_ret = 1;
1359                         cinfo->ret.size   = size;
1360                         cinfo->ret.vtsize = size;
1361                         gr++;
1362                         break;
1363                 }
1364                 case MONO_TYPE_TYPEDBYREF:
1365                         size = sizeof (MonoTypedRef);
1366                         cinfo->ret.reg    = s390_r2;
1367                         cinfo->struct_ret = 1;
1368                         cinfo->ret.size   = size;
1369                         cinfo->ret.vtsize = size;
1370                         gr++;
1371                         break;
1372                 case MONO_TYPE_VOID:
1373                         break;
1374                 default:
1375                         g_error ("mini-s390: cannot handle as return value 0x%x (0x%x)", sig->ret->type,simpletype);
1376         }
1377
1378         if (sig->hasthis) {
1379                 add_general (&gr, sz, cinfo->args+nParm, TRUE);
1380                 cinfo->args[nParm].size = sizeof(gpointer);
1381                 nParm++;
1382         }
1383
1384         /*----------------------------------------------------------*/
1385         /* We determine the size of the parameter code and stack    */
1386         /* requirements by checking the types and sizes of the      */
1387         /* parameters.                                              */
1388         /*----------------------------------------------------------*/
1389
1390         for (i = 0; i < sig->param_count; ++i) {
1391                 /*--------------------------------------------------*/
1392                 /* Handle vararg type calls. All args are put on    */
1393                 /* the stack.                                       */
1394                 /*--------------------------------------------------*/
1395                 if ((sig->call_convention == MONO_CALL_VARARG) &&
1396                     (i == sig->sentinelpos)) {
1397                         gr = S390_LAST_ARG_REG + 1;
1398                         add_general (&gr, sz, &cinfo->sigCookie, TRUE);
1399                 }
1400
1401                 if (sig->params [i]->byref) {
1402                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1403                         cinfo->args[nParm].size = sizeof(gpointer);
1404                         nParm++;
1405                         continue;
1406                 }
1407
1408                 simpletype = mono_type_get_underlying_type(sig->params [i])->type;
1409                 switch (simpletype) {
1410                 case MONO_TYPE_BOOLEAN:
1411                 case MONO_TYPE_I1:
1412                 case MONO_TYPE_U1:
1413                         cinfo->args[nParm].size = sizeof(char);
1414                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1415                         nParm++;
1416                         break;
1417                 case MONO_TYPE_I2:
1418                 case MONO_TYPE_U2:
1419                 case MONO_TYPE_CHAR:
1420                         cinfo->args[nParm].size = sizeof(short);
1421                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1422                         nParm++;
1423                         break;
1424                 case MONO_TYPE_I4:
1425                 case MONO_TYPE_U4:
1426                         cinfo->args[nParm].size = sizeof(int);
1427                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1428                         nParm++;
1429                         break;
1430                 case MONO_TYPE_I:
1431                 case MONO_TYPE_U:
1432                 case MONO_TYPE_PTR:
1433                 case MONO_TYPE_FNPTR:
1434                 case MONO_TYPE_CLASS:
1435                 case MONO_TYPE_OBJECT:
1436                 case MONO_TYPE_STRING:
1437                 case MONO_TYPE_SZARRAY:
1438                 case MONO_TYPE_ARRAY:
1439                         cinfo->args[nParm].size = sizeof(gpointer);
1440                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1441                         nParm++;
1442                         break;
1443                 case MONO_TYPE_I8:
1444                 case MONO_TYPE_U8:
1445                         cinfo->args[nParm].size = sizeof(long long);
1446                         add_general (&gr, sz, cinfo->args+nParm, FALSE);
1447                         nParm++;
1448                         break;
1449                 case MONO_TYPE_R4:
1450                         cinfo->args[nParm].size = sizeof(float);
1451                         add_float (&fr, sz, cinfo->args+nParm);
1452                         nParm++;
1453                         break;
1454                 case MONO_TYPE_R8:
1455                         cinfo->args[nParm].size = sizeof(double);
1456                         add_float (&fr, sz, cinfo->args+nParm);
1457                         nParm++;
1458                         break;
1459                 case MONO_TYPE_GENERICINST:
1460                         if (!mono_type_generic_inst_is_valuetype (sig->params [i])) {
1461                                 cinfo->args[nParm].size = sizeof(gpointer);
1462                                 add_general (&gr, sz, cinfo->args+nParm, TRUE);
1463                                 nParm++;
1464                                 break;
1465                         }
1466                         /* Fall through */
1467                 case MONO_TYPE_VALUETYPE: {
1468                         MonoMarshalType *info;
1469                         MonoClass *klass = mono_class_from_mono_type (sig->params [i]);
1470                         if (sig->pinvoke)
1471                                 size = mono_class_native_size (klass, &align);
1472                         else
1473                                 size = mono_class_value_size (klass, &align);
1474
1475                         info = mono_marshal_load_type_info (klass);
1476
1477                         if ((info->native_size == sizeof(float)) &&
1478                             (info->num_fields  == 1) &&
1479                             (info->fields[0].field->type->type == MONO_TYPE_R4)) {
1480                                 cinfo->args[nParm].size = sizeof(float);
1481                                 add_float(&fr, sz, cinfo->args+nParm);
1482                                 break;
1483                         }
1484
1485                         if ((info->native_size == sizeof(double)) &&
1486                             (info->num_fields  == 1) &&
1487                             (info->fields[0].field->type->type == MONO_TYPE_R8)) {
1488                                 cinfo->args[nParm].size = sizeof(double);
1489                                 add_float(&fr, sz, cinfo->args+nParm);
1490                                 break;
1491                         }
1492
1493                         cinfo->args[nParm].vtsize  = 0;
1494                         cinfo->args[nParm].size    = 0;
1495
1496                         switch (size) {
1497                                 /*----------------------------------*/
1498                                 /* On S/390, structures of size 1,  */
1499                                 /* 2, 4, and 8 bytes are passed in  */
1500                                 /* (a) register(s).                 */
1501                                 /*----------------------------------*/
1502                                 case 0:
1503                                 case 1:
1504                                 case 2:
1505                                 case 4:
1506                                         add_general(&gr, sz, cinfo->args+nParm, TRUE);
1507                                         cinfo->args[nParm].size    = size;
1508                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1509                                         nParm++;
1510                                         sz->local_size            += sizeof(long);
1511                                         break;
1512                                 case 8:
1513                                         add_general(&gr, sz, cinfo->args+nParm, FALSE);
1514                                         cinfo->args[nParm].size    = sizeof(long long);
1515                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1516                                         nParm++;
1517                                         sz->local_size            += sizeof(long long);
1518                                         break;
1519                                 default:
1520                                         add_stackParm(&gr, sz, cinfo->args+nParm, size);
1521                                         nParm++;
1522                         }
1523                 }
1524                         break;
1525                 case MONO_TYPE_TYPEDBYREF: {
1526                         int size = sizeof (MonoTypedRef);
1527
1528                         cinfo->args[nParm].vtsize  = 0;
1529                         cinfo->args[nParm].size    = 0;
1530
1531                         switch (size) {
1532                                 /*----------------------------------*/
1533                                 /* On S/390, structures of size 1,  */
1534                                 /* 2, 4, and 8 bytes are passed in  */
1535                                 /* (a) register(s).                 */
1536                                 /*----------------------------------*/
1537                                 case 0:
1538                                 case 1:
1539                                 case 2:
1540                                 case 4:
1541                                         add_general(&gr, sz, cinfo->args+nParm, TRUE);
1542                                         cinfo->args[nParm].size    = size;
1543                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1544                                         nParm++;
1545                                         sz->local_size            += sizeof(long);
1546                                         break;
1547                                 case 8:
1548                                         add_general(&gr, sz, cinfo->args+nParm, FALSE);
1549                                         cinfo->args[nParm].size    = sizeof(long long);
1550                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1551                                         nParm++;
1552                                         sz->local_size            += sizeof(long long);
1553                                         break;
1554                                 default:
1555                                         add_stackParm(&gr, sz, cinfo->args+nParm, size);
1556                                         nParm++;
1557                         }
1558                 }
1559                         break;
1560                 default:
1561                         g_error ("Can't trampoline 0x%x", sig->params [i]->type);
1562                 }
1563         }
1564
1565         /*----------------------------------------------------------*/
1566         /* If we are passing a structure back then if it won't be   */
1567         /* in a register(s) then we make room at the end of the     */
1568         /* parameters that may have been placed on the stack        */
1569         /*----------------------------------------------------------*/
1570         if (cinfo->struct_ret) {
1571                 cinfo->ret.offset = sz->stack_size;
1572                 switch (cinfo->ret.size) {
1573                 case 0:
1574                 case 1:
1575                 case 2:
1576                 case 4:
1577                 case 8:
1578                         break;
1579                 default:
1580                         sz->stack_size   += S390_ALIGN(cinfo->ret.size, align);
1581                 }
1582         }
1583
1584         /*----------------------------------------------------------*/
1585         /* Handle the case where there are no implicit arguments    */
1586         /*----------------------------------------------------------*/
1587         if ((sig->call_convention == MONO_CALL_VARARG) &&
1588             (sig->param_count == sig->sentinelpos)) {
1589                 gr = S390_LAST_ARG_REG + 1;
1590                 add_general (&gr, sz, &cinfo->sigCookie, TRUE);
1591         }
1592
1593         cinfo->lastgr   = gr;
1594         sz->stack_size  = sz->stack_size + sz->local_size + sz->parm_size +
1595                           sz->offset;
1596         sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1597
1598         return (cinfo);
1599 }
1600
1601 /*========================= End of Function ========================*/
1602
1603 /*------------------------------------------------------------------*/
1604 /*                                                                  */
1605 /* Name         - mono_arch_allocate_vars                           */
1606 /*                                                                  */
1607 /* Function     - Set var information according to the calling      */
1608 /*                convention for S/390. The local var stuff should  */
1609 /*                most likely be split in another method.           */
1610 /*                                                                  */
1611 /* Parameter    - @m - Compile unit.                                */
1612 /*                                                                  */
1613 /*------------------------------------------------------------------*/
1614
1615 void
1616 mono_arch_allocate_vars (MonoCompile *cfg)
1617 {
1618         MonoMethodSignature *sig;
1619         MonoMethodHeader *header;
1620         MonoInst *inst;
1621         CallInfo *cinfo;
1622         size_data sz;
1623         int iParm, iVar, offset, size, align, curinst;
1624         int frame_reg = STK_BASE;
1625         int sArg, eArg;
1626
1627         header  = mono_method_get_header (cfg->method);
1628
1629         cfg->flags |= MONO_CFG_HAS_SPILLUP;
1630
1631         /*---------------------------------------------------------*/
1632         /* We use the frame register also for any method that has  */
1633         /* filter clauses. This way, when the handlers are called, */
1634         /* the code will reference local variables using the frame */
1635         /* reg instead of the stack pointer: if we had to restore  */
1636         /* the stack pointer, we'd corrupt the method frames that  */
1637         /* are already on the stack (since filters get called      */
1638         /* before stack unwinding happens) when the filter code    */
1639         /* would call any method.                                  */
1640         /*---------------------------------------------------------*/
1641         if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
1642                 frame_reg = s390_r11;
1643
1644         cfg->frame_reg = frame_reg;
1645
1646         if (frame_reg != STK_BASE)
1647                 cfg->used_int_regs |= 1 << frame_reg;
1648
1649         sig     = mono_method_signature (cfg->method);
1650
1651         cinfo   = calculate_sizes (sig, &sz, sig->pinvoke);
1652
1653         if (cinfo->struct_ret) {
1654                 cfg->ret->opcode = OP_REGVAR;
1655                 cfg->ret->inst_c0 = s390_r2;
1656         } else {
1657                 switch (mono_type_get_underlying_type (sig->ret)->type) {
1658                 case MONO_TYPE_VOID:
1659                         break;
1660                 default:
1661                         cfg->ret->opcode = OP_REGVAR;
1662                         cfg->ret->dreg   = s390_r2;
1663                         break;
1664                 }
1665         }
1666
1667         /*--------------------------------------------------------------*/
1668         /* local vars are at a positive offset from the stack pointer   */
1669         /* also note that if the function uses alloca, we use s390_r11  */
1670         /* to point at the local variables.                             */
1671         /* add parameter area size for called functions                 */
1672         /*--------------------------------------------------------------*/
1673         offset          = (cfg->param_area + S390_MINIMAL_STACK_SIZE);
1674         cfg->sig_cookie = 0;
1675
1676         if (cinfo->struct_ret) {
1677                 inst               = cfg->ret;
1678                 offset             = S390_ALIGN(offset, sizeof(gpointer));
1679                 inst->inst_offset  = offset;
1680                 inst->opcode       = OP_REGOFFSET;
1681                 inst->inst_basereg = frame_reg;
1682                 offset            += sizeof(gpointer);
1683                 if ((sig->call_convention == MONO_CALL_VARARG) &&
1684                     (!retFitsInReg (cinfo->ret.size)))
1685                         cfg->sig_cookie += cinfo->ret.size;
1686         }
1687
1688         if (sig->hasthis) {
1689                 inst = cfg->args [0];
1690                 if (inst->opcode != OP_REGVAR) {
1691                         inst->opcode       = OP_REGOFFSET;
1692                         inst->inst_basereg = frame_reg;
1693                         offset             = S390_ALIGN(offset, sizeof(gpointer));
1694                         inst->inst_offset  = offset;
1695                         offset            += sizeof (gpointer);
1696                 }
1697                 curinst = sArg = 1;
1698         } else {
1699                 curinst = sArg = 0;
1700         }
1701
1702         eArg = sig->param_count + sArg;
1703
1704         if (sig->call_convention == MONO_CALL_VARARG)
1705                 cfg->sig_cookie += S390_MINIMAL_STACK_SIZE;
1706
1707         for (iParm = sArg; iParm < eArg; ++iParm) {
1708                 inst = cfg->args [curinst];
1709                 if (inst->opcode != OP_REGVAR) {
1710                         switch (cinfo->args[iParm].regtype) {
1711                                 case RegTypeStructByAddr :
1712                                 if (cinfo->args[iParm].reg == STK_BASE) {
1713                                         inst->opcode       = OP_S390_LOADARG;
1714                                         inst->inst_basereg = frame_reg;
1715                                         size               = abs(cinfo->args[iParm].vtsize);
1716                                         offset             = S390_ALIGN(offset, sizeof(long));
1717                                         inst->inst_offset  = offset;
1718                                         inst->backend.arg_info       = cinfo->args[iParm].offset;
1719                                 } else {
1720                                         inst->opcode       = OP_S390_ARGREG;
1721                                         inst->inst_basereg = frame_reg;
1722                                         size               = sizeof(gpointer);
1723                                         offset             = S390_ALIGN(offset, size);
1724                                         inst->inst_offset  = offset;
1725                                         inst->backend.arg_info       = cinfo->args[iParm].offset;
1726                                 }
1727                                         break;
1728                                 case RegTypeStructByVal :
1729                                         inst->opcode       = OP_S390_ARGPTR;
1730                                         inst->inst_basereg = frame_reg;
1731                                         size               = cinfo->args[iParm].size;
1732                                         offset             = S390_ALIGN(offset, size);
1733                                         inst->inst_offset  = offset;
1734                                         inst->backend.arg_info       = cinfo->args[iParm].offset;
1735                                         break;
1736                                 default :
1737                                 if (cinfo->args[iParm].reg != STK_BASE) {
1738                                         inst->opcode       = OP_REGOFFSET;
1739                                         inst->inst_basereg = frame_reg;
1740                                         size               = (cinfo->args[iParm].size < 8
1741                                                               ? sizeof(long)
1742                                                               : sizeof(long long));
1743                                         offset             = S390_ALIGN(offset, size);
1744                                         inst->inst_offset  = offset;
1745                                 } else {
1746                                         inst->opcode       = OP_S390_STKARG;
1747                                         inst->inst_basereg = frame_reg;
1748                                         size               = (cinfo->args[iParm].size < 4
1749                                                               ? 4 - cinfo->args[iParm].size
1750                                                               : 0);
1751                                         inst->inst_offset  = cinfo->args[iParm].offset +
1752                                                              size;
1753                                         inst->backend.arg_info       = 0;
1754                                         size               = sizeof(long);
1755                                 }
1756                         }
1757                         if ((sig->call_convention == MONO_CALL_VARARG) &&
1758                             (cinfo->args[iParm].regtype != RegTypeGeneral) &&
1759                             (iParm < sig->sentinelpos))
1760                                 cfg->sig_cookie += size;
1761
1762                         offset += size;
1763                 }
1764                 curinst++;
1765         }
1766
1767         curinst = cfg->locals_start;
1768         for (iVar = curinst; iVar < cfg->num_varinfo; ++iVar) {
1769                 inst = cfg->varinfo [iVar];
1770                 if ((inst->flags & MONO_INST_IS_DEAD) ||
1771                     (inst->opcode == OP_REGVAR))
1772                         continue;
1773
1774                 /*--------------------------------------------------*/
1775                 /* inst->backend.is_pinvoke indicates native sized value types, */
1776                 /* this is used by the pinvoke wrappers when they   */
1777                 /* call functions returning structure               */
1778                 /*--------------------------------------------------*/
1779                 if (inst->backend.is_pinvoke && MONO_TYPE_ISSTRUCT (inst->inst_vtype))
1780                         size = mono_class_native_size (mono_class_from_mono_type(inst->inst_vtype), &align);
1781                 else
1782                         size = mono_type_size (inst->inst_vtype, &align);
1783
1784                 offset             = S390_ALIGN(offset, align);
1785                 inst->inst_offset  = offset;
1786                 inst->opcode       = OP_REGOFFSET;
1787                 inst->inst_basereg = frame_reg;
1788                 offset            += size;
1789                 DEBUG (g_print("allocating local %d to %ld\n", iVar, inst->inst_offset));
1790         }
1791
1792         /*------------------------------------------------------*/
1793         /* Allow space for the trace method stack area if needed*/
1794         /*------------------------------------------------------*/
1795         if (mono_jit_trace_calls != NULL && mono_trace_eval (cfg->method)) {
1796                 offset += S390_TRACE_STACK_SIZE;
1797         }
1798
1799         /*------------------------------------------------------*/
1800         /* Reserve space to save LMF and caller saved registers */
1801         /*------------------------------------------------------*/
1802         if (cfg->method->save_lmf)
1803                 offset += sizeof (MonoLMF);
1804
1805         /*------------------------------------------------------*/
1806         /* align the offset                                     */
1807         /*------------------------------------------------------*/
1808         cfg->stack_offset = S390_ALIGN(offset, S390_STACK_ALIGNMENT);
1809
1810 }
1811
1812 /*========================= End of Function ========================*/
1813
1814 /*------------------------------------------------------------------*/
1815 /*                                                                  */
1816 /* Name         - mono_arch_call_opcode                             */
1817 /*                                                                  */
1818 /* Function     - Take the arguments and generate the arch-specific */
1819 /*                instructions to properly call the function. This  */
1820 /*                includes pushing, moving argments to the correct  */
1821 /*                etc.                                              */
1822 /*                                                                  */
1823 /*------------------------------------------------------------------*/
1824
1825 MonoCallInst*
1826 mono_arch_call_opcode (MonoCompile *cfg, MonoBasicBlock* bb,
1827                        MonoCallInst *call, int is_virtual) {
1828         MonoInst *in;
1829         MonoCallArgParm *arg;
1830         MonoMethodSignature *sig;
1831         int i, n, lParamArea;
1832         CallInfo *cinfo;
1833         ArgInfo *ainfo = NULL;
1834         size_data sz;
1835         int stackSize;
1836
1837         sig = call->signature;
1838         n = sig->param_count + sig->hasthis;
1839         DEBUG (g_print ("Call requires: %d parameters\n",n));
1840
1841         cinfo = calculate_sizes (sig, &sz, sig->pinvoke);
1842
1843         stackSize         = sz.stack_size + sz.local_size + sz.parm_size + sz.offset;
1844         call->stack_usage = MAX(stackSize, call->stack_usage);
1845         lParamArea        = MAX((call->stack_usage-S390_MINIMAL_STACK_SIZE-sz.parm_size), 0);
1846         cfg->param_area   = MAX(((signed) cfg->param_area), lParamArea);
1847         cfg->flags       |= MONO_CFG_HAS_CALLS;
1848
1849         if (cinfo->struct_ret)
1850                 call->used_iregs |= 1 << cinfo->ret.reg;
1851
1852         for (i = 0; i < n; ++i) {
1853                 ainfo = cinfo->args + i;
1854
1855                 if ((sig->call_convention == MONO_CALL_VARARG) &&
1856                     (i == sig->sentinelpos)) {
1857                         emit_sig_cookie (cfg, call, cinfo, ainfo->size);
1858                 }
1859
1860                 if (is_virtual && i == 0) {
1861                         /* the argument will be attached to the call instrucion */
1862                         in = call->args [i];
1863                         call->used_iregs |= 1 << ainfo->reg;
1864                 } else {
1865                         MONO_INST_NEW_CALL_ARG (cfg, arg, OP_OUTARG);
1866                         in                  = call->args [i];
1867                         arg->ins.cil_code   = in->cil_code;
1868                         arg->ins.inst_left  = in;
1869                         arg->ins.type       = in->type;
1870                         MONO_INST_LIST_ADD_TAIL (&arg->ins.node, &call->out_args);
1871                         arg->ins.inst_right = (MonoInst *) call;
1872                         if (ainfo->regtype == RegTypeGeneral) {
1873                                 arg->ins.backend.reg3   = ainfo->reg;
1874                                 call->used_iregs |= 1 << ainfo->reg;
1875                                 if (arg->ins.type == STACK_I8)
1876                                         call->used_iregs |= 1 << (ainfo->reg + 1);
1877                         } else if (ainfo->regtype == RegTypeStructByAddr) {
1878                                 call->used_iregs |= 1 << ainfo->reg;
1879                                 arg->ins.sreg1    = ainfo->reg;
1880                                 arg->ins.opcode   = OP_OUTARG_VT;
1881                                 arg->size         = -ainfo->vtsize;
1882                                 arg->offset       = ainfo->offset;
1883                                 arg->offPrm       = ainfo->offparm + sz.offStruct;
1884                         } else if (ainfo->regtype == RegTypeStructByVal) {
1885                                 if (ainfo->reg != STK_BASE) {
1886                                         switch (ainfo->size) {
1887                                         case 0:
1888                                         case 1:
1889                                         case 2:
1890                                         case 4:
1891                                                 call->used_iregs |= 1 << ainfo->reg;
1892                                                 break;
1893                                         case 8:
1894                                                 call->used_iregs |= 1 << ainfo->reg;
1895                                                 call->used_iregs |= 1 << (ainfo->reg+1);
1896                                                 break;
1897                                         default:
1898                                                 call->used_iregs |= 1 << ainfo->reg;
1899                                         }
1900                                 }
1901                                 arg->ins.sreg1  = ainfo->reg;
1902                                 arg->ins.opcode = OP_OUTARG_VT;
1903                                 arg->size       = ainfo->size;
1904                                 arg->offset     = ainfo->offset;
1905                                 arg->offPrm     = ainfo->offparm + sz.offStruct;
1906                         } else if (ainfo->regtype == RegTypeBase) {
1907                                 arg->ins.opcode   = OP_OUTARG_MEMBASE;
1908                                 arg->ins.sreg1    = ainfo->reg;
1909                                 arg->size         = ainfo->size;
1910                                 arg->offset       = ainfo->offset;
1911                                 call->used_iregs |= 1 << ainfo->reg;
1912                         } else if (ainfo->regtype == RegTypeFP) {
1913                                 arg->ins.backend.reg3   = ainfo->reg;
1914                                 call->used_fregs |= 1 << ainfo->reg;
1915                                 if (ainfo->size == 4)
1916                                         arg->ins.opcode = OP_OUTARG_R4;
1917                                 else
1918                                         arg->ins.opcode = OP_OUTARG_R8;
1919                         } else {
1920                                 g_assert_not_reached ();
1921                         }
1922                 }
1923         }
1924
1925         /*
1926          * Handle the case where there are no implicit arguments
1927          */
1928         if ((sig->call_convention == MONO_CALL_VARARG) &&
1929             (i == sig->sentinelpos)) {
1930                 emit_sig_cookie (cfg, call, cinfo, ainfo->size);
1931         }
1932
1933         g_free (cinfo);
1934         return call;
1935 }
1936
1937 /*========================= End of Function ========================*/
1938
1939 /*------------------------------------------------------------------*/
1940 /*                                                                  */
1941 /* Name         - emit_sig_cookie.                                  */
1942 /*                                                                  */
1943 /* Function     - For variable length parameter lists construct a   */
1944 /*                signature cookie and emit it.                     */
1945 /*                                                                  */
1946 /*------------------------------------------------------------------*/
1947
1948 static void
1949 emit_sig_cookie (MonoCompile *cfg, MonoCallInst *call,
1950                  CallInfo *cinfo, int argSize)
1951 {
1952         MonoCallArgParm *arg;
1953         MonoMethodSignature *tmpSig;
1954         MonoInst *sigArg;
1955
1956         cfg->disable_aot = TRUE;
1957
1958         /*----------------------------------------------------------*/
1959         /* mono_ArgIterator_Setup assumes the signature cookie is   */
1960         /* passed first and all the arguments which were before it  */
1961         /* passed on the stack after the signature. So compensate   */
1962         /* by passing a different signature.                        */
1963         /*----------------------------------------------------------*/
1964         tmpSig = mono_metadata_signature_dup (call->signature);
1965         tmpSig->param_count -= call->signature->sentinelpos;
1966         tmpSig->sentinelpos  = 0;
1967         if (tmpSig->param_count > 0)
1968                 memcpy (tmpSig->params,
1969                         call->signature->params + call->signature->sentinelpos,
1970                         tmpSig->param_count * sizeof(MonoType *));
1971
1972         MONO_INST_NEW (cfg, sigArg, OP_ICONST);
1973         sigArg->inst_p0 = tmpSig;
1974
1975         MONO_INST_NEW_CALL_ARG (cfg, arg, OP_OUTARG_MEMBASE);
1976         arg->ins.inst_left   = sigArg;
1977         arg->ins.inst_right  = (MonoInst *) call;
1978         arg->size            = argSize;
1979         arg->offset          = cinfo->sigCookie.offset;
1980         MONO_INST_LIST_ADD_TAIL (&arg->ins.node, &call->out_args);
1981 }
1982
1983 /*========================= End of Function ========================*/
1984
1985 /*------------------------------------------------------------------*/
1986 /*                                                                  */
1987 /* Name         - mono_arch_instrument_mem_needs                    */
1988 /*                                                                  */
1989 /* Function     - Allow tracing to work with this interface (with   */
1990 /*                an optional argument).                            */
1991 /*                                                                  */
1992 /*------------------------------------------------------------------*/
1993
1994 void
1995 mono_arch_instrument_mem_needs (MonoMethod *method, int *stack, int *code)
1996 {
1997         /* no stack room needed now (may be needed for FASTCALL-trace support) */
1998         *stack = 0;
1999         /* split prolog-epilog requirements? */
2000         *code = 50; /* max bytes needed: check this number */
2001 }
2002
2003 /*========================= End of Function ========================*/
2004
2005 /*------------------------------------------------------------------*/
2006 /*                                                                  */
2007 /* Name         - mono_arch_instrument_prolog                       */
2008 /*                                                                  */
2009 /* Function     - Create an "instrumented" prolog.                  */
2010 /*                                                                  */
2011 /*------------------------------------------------------------------*/
2012
2013 void*
2014 mono_arch_instrument_prolog (MonoCompile *cfg, void *func, void *p,
2015                              gboolean enable_arguments)
2016 {
2017         guchar  *code = p;
2018         int     parmOffset,
2019                 fpOffset,
2020                 baseReg;
2021
2022         parmOffset = cfg->stack_usage - S390_TRACE_STACK_SIZE;
2023         if (cfg->method->save_lmf)
2024                 parmOffset -= sizeof(MonoLMF);
2025         fpOffset   = parmOffset + (5*sizeof(gint32));
2026         if (fpOffset > 4096) {
2027                 s390_lr (code, s390_r12, STK_BASE);
2028                 baseReg = s390_r12;
2029                 while (fpOffset > 4096) {
2030                         s390_ahi (code, baseReg, 4096);
2031                         fpOffset   -= 4096;
2032                         parmOffset -= 4096;
2033                 }
2034         } else {
2035                 baseReg = STK_BASE;
2036         }
2037
2038         s390_stm  (code, s390_r2, s390_r6, baseReg, parmOffset);
2039         s390_std  (code, s390_f0, 0, baseReg, fpOffset);
2040         s390_std  (code, s390_f1, 0, baseReg, fpOffset+sizeof(gdouble));
2041         s390_std  (code, s390_f2, 0, baseReg, fpOffset+2*sizeof(gdouble));
2042         s390_basr (code, s390_r13, 0);
2043         s390_j    (code, 6);
2044         s390_word (code, cfg->method);
2045         s390_word (code, func);
2046         s390_l    (code, s390_r2, 0, s390_r13, 4);
2047         s390_la   (code, s390_r3, 0, baseReg, parmOffset);
2048         s390_lr   (code, s390_r4, STK_BASE);
2049         s390_ahi  (code, s390_r4, cfg->stack_usage);
2050         s390_l    (code, s390_r1, 0, s390_r13, 8);
2051         s390_basr (code, s390_r14, s390_r1);
2052         s390_ld   (code, s390_f2, 0, baseReg, fpOffset+2*sizeof(gdouble));
2053         s390_ld   (code, s390_f1, 0, baseReg, fpOffset+sizeof(gdouble));
2054         s390_ld   (code, s390_f0, 0, baseReg, fpOffset);
2055         s390_lm   (code, s390_r2, s390_r6, baseReg, parmOffset);
2056
2057         return code;
2058 }
2059
2060 /*========================= End of Function ========================*/
2061
2062 /*------------------------------------------------------------------*/
2063 /*                                                                  */
2064 /* Name         - mono_arch_instrument_epilog                       */
2065 /*                                                                  */
2066 /* Function     - Create an epilog that will handle the returned    */
2067 /*                values used in instrumentation.                   */
2068 /*                                                                  */
2069 /*------------------------------------------------------------------*/
2070
2071 void*
2072 mono_arch_instrument_epilog (MonoCompile *cfg, void *func, void *p, gboolean enable_arguments)
2073 {
2074         guchar     *code = p;
2075         int        save_mode = SAVE_NONE,
2076                    saveOffset;
2077         MonoMethod *method = cfg->method;
2078         int        rtype = mono_type_get_underlying_type (mono_method_signature (method)->ret)->type;
2079
2080         saveOffset = cfg->stack_usage - S390_TRACE_STACK_SIZE;
2081         if (method->save_lmf)
2082                 saveOffset -= sizeof(MonoLMF);
2083
2084 handle_enum:
2085         switch (rtype) {
2086         case MONO_TYPE_VOID:
2087                 /* special case string .ctor icall */
2088                 if (strcmp (".ctor", method->name) && method->klass == mono_defaults.string_class)
2089                         save_mode = SAVE_ONE;
2090                 else
2091                         save_mode = SAVE_NONE;
2092                 break;
2093         case MONO_TYPE_I8:
2094         case MONO_TYPE_U8:
2095                 save_mode = SAVE_TWO;
2096                 break;
2097         case MONO_TYPE_R4:
2098                 save_mode = SAVE_R4;
2099                 break;
2100         case MONO_TYPE_R8:
2101                 save_mode = SAVE_R8;
2102                 break;
2103         case MONO_TYPE_VALUETYPE:
2104                 if (mono_method_signature (method)->ret->data.klass->enumtype) {
2105                         rtype = mono_method_signature (method)->ret->data.klass->enum_basetype->type;
2106                         goto handle_enum;
2107                 }
2108                 save_mode = SAVE_STRUCT;
2109                 break;
2110         default:
2111                 save_mode = SAVE_ONE;
2112                 break;
2113         }
2114
2115         switch (save_mode) {
2116         case SAVE_TWO:
2117                 s390_stm (code, s390_r2, s390_r3, cfg->frame_reg, saveOffset);
2118                 if (enable_arguments) {
2119                         s390_lr (code, s390_r4, s390_r3);
2120                         s390_lr (code, s390_r3, s390_r2);
2121                 }
2122                 break;
2123         case SAVE_ONE:
2124                 s390_st (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2125                 if (enable_arguments) {
2126                         s390_lr (code, s390_r3, s390_r2);
2127                 }
2128                 break;
2129         case SAVE_R4:
2130                 s390_std (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2131                 if (enable_arguments) {
2132                         s390_ldebr (code, s390_f0, s390_f0);
2133                 }
2134                 break;
2135         case SAVE_R8:
2136                 s390_std (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2137                 break;
2138         case SAVE_STRUCT:
2139                 s390_st (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2140                 if (enable_arguments) {
2141                         s390_l (code, s390_r3, 0, cfg->frame_reg,
2142                                 S390_MINIMAL_STACK_SIZE+cfg->param_area);
2143                 }
2144                 break;
2145         case SAVE_NONE:
2146         default:
2147                 break;
2148         }
2149
2150         s390_basr (code, s390_r13, 0);
2151         s390_j    (code, 6);
2152         s390_word (code, cfg->method);
2153         s390_word (code, func);
2154         s390_l    (code, s390_r2, 0, s390_r13, 4);
2155         s390_l    (code, s390_r1, 0, s390_r13, 8);
2156         s390_basr (code, s390_r14, s390_r1);
2157
2158         switch (save_mode) {
2159         case SAVE_TWO:
2160                 s390_lm  (code, s390_r2, s390_r3, cfg->frame_reg, saveOffset);
2161                 break;
2162         case SAVE_ONE:
2163                 s390_l   (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2164                 break;
2165         case SAVE_R4:
2166         case SAVE_R8:
2167                 s390_ld  (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2168                 break;
2169         case SAVE_STRUCT:
2170                 s390_l   (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2171                 break;
2172         case SAVE_NONE:
2173         default:
2174                 break;
2175         }
2176
2177         return code;
2178 }
2179
2180 /*========================= End of Function ========================*/
2181
2182 /*------------------------------------------------------------------*/
2183 /*                                                                  */
2184 /* Name         - peephole_pass                                     */
2185 /*                                                                  */
2186 /* Function     - Form a peephole pass at the code looking for      */
2187 /*                simple optimizations.                             */
2188 /*                                                                  */
2189 /*------------------------------------------------------------------*/
2190
2191 static void
2192 peephole_pass (MonoCompile *cfg, MonoBasicBlock *bb)
2193 {
2194         MonoInst *ins, *n;
2195
2196         MONO_INST_LIST_FOR_EACH_ENTRY_SAFE (ins, n, &bb->ins_list, node) {
2197                 MonoInst *last_ins = mono_inst_list_prev (&ins->node, &bb->ins_list);
2198                 switch (ins->opcode) {
2199                 case OP_MUL_IMM:
2200                         /* remove unnecessary multiplication with 1 */
2201                         if (ins->inst_imm == 1) {
2202                                 if (ins->dreg != ins->sreg1) {
2203                                         ins->opcode = OP_MOVE;
2204                                 } else {
2205                                         MONO_DEL_INS (ins);
2206                                         continue;
2207                                 }
2208                         }
2209                         break;
2210                 case OP_LOAD_MEMBASE:
2211                 case OP_LOADI4_MEMBASE:
2212                         /*
2213                          * OP_STORE_MEMBASE_REG reg, offset(basereg)
2214                          * OP_LOAD_MEMBASE offset(basereg), reg
2215                          */
2216                         if (last_ins && (last_ins->opcode == OP_STOREI4_MEMBASE_REG
2217                                          || last_ins->opcode == OP_STORE_MEMBASE_REG) &&
2218                             ins->inst_basereg == last_ins->inst_destbasereg &&
2219                             ins->inst_offset == last_ins->inst_offset) {
2220                                 if (ins->dreg == last_ins->sreg1) {
2221                                         MONO_DEL_INS (ins);
2222                                         continue;
2223                                 } else {
2224                                         ins->opcode = OP_MOVE;
2225                                         ins->sreg1 = last_ins->sreg1;
2226                                 }
2227
2228                         /*
2229                          * Note: reg1 must be different from the basereg in the second load
2230                          * OP_LOAD_MEMBASE offset(basereg), reg1
2231                          * OP_LOAD_MEMBASE offset(basereg), reg2
2232                          * -->
2233                          * OP_LOAD_MEMBASE offset(basereg), reg1
2234                          * OP_MOVE reg1, reg2
2235                          */
2236                         } if (last_ins && (last_ins->opcode == OP_LOADI4_MEMBASE
2237                                            || last_ins->opcode == OP_LOAD_MEMBASE) &&
2238                               ins->inst_basereg != last_ins->dreg &&
2239                               ins->inst_basereg == last_ins->inst_basereg &&
2240                               ins->inst_offset == last_ins->inst_offset) {
2241
2242                                 if (ins->dreg == last_ins->dreg) {
2243                                         MONO_DEL_INS (ins);
2244                                         continue;
2245                                 } else {
2246                                         ins->opcode = OP_MOVE;
2247                                         ins->sreg1 = last_ins->dreg;
2248                                 }
2249
2250                                 //g_assert_not_reached ();
2251
2252 #if 0
2253                         /*
2254                          * OP_STORE_MEMBASE_IMM imm, offset(basereg)
2255                          * OP_LOAD_MEMBASE offset(basereg), reg
2256                          * -->
2257                          * OP_STORE_MEMBASE_IMM imm, offset(basereg)
2258                          * OP_ICONST reg, imm
2259                          */
2260                         } else if (last_ins && (last_ins->opcode == OP_STOREI4_MEMBASE_IMM
2261                                                 || last_ins->opcode == OP_STORE_MEMBASE_IMM) &&
2262                                    ins->inst_basereg == last_ins->inst_destbasereg &&
2263                                    ins->inst_offset == last_ins->inst_offset) {
2264                                 //static int c = 0; printf ("MATCHX %s %d\n", cfg->method->name,c++);
2265                                 ins->opcode = OP_ICONST;
2266                                 ins->inst_c0 = last_ins->inst_imm;
2267                                 g_assert_not_reached (); // check this rule
2268 #endif
2269                         }
2270                         break;
2271                 case OP_LOADU1_MEMBASE:
2272                 case OP_LOADI1_MEMBASE:
2273                         if (last_ins && (last_ins->opcode == OP_STOREI1_MEMBASE_REG) &&
2274                                         ins->inst_basereg == last_ins->inst_destbasereg &&
2275                                         ins->inst_offset == last_ins->inst_offset) {
2276                                 ins->opcode = (ins->opcode == OP_LOADI1_MEMBASE) ? CEE_CONV_I1 : CEE_CONV_U1;
2277                                 ins->sreg1 = last_ins->sreg1;
2278                         }
2279                         break;
2280                 case OP_LOADU2_MEMBASE:
2281                 case OP_LOADI2_MEMBASE:
2282                         if (last_ins && (last_ins->opcode == OP_STOREI2_MEMBASE_REG) &&
2283                                         ins->inst_basereg == last_ins->inst_destbasereg &&
2284                                         ins->inst_offset == last_ins->inst_offset) {
2285                                 ins->opcode = (ins->opcode == OP_LOADI2_MEMBASE) ? CEE_CONV_I2 : CEE_CONV_U2;
2286                                 ins->sreg1 = last_ins->sreg1;
2287                         }
2288                         break;
2289                 case CEE_CONV_I4:
2290                 case CEE_CONV_U4:
2291                 case OP_MOVE:
2292                         /*
2293                          * OP_MOVE reg, reg
2294                          */
2295                         if (ins->dreg == ins->sreg1) {
2296                                 MONO_DEL_INS (ins);
2297                                 continue;
2298                         }
2299                         /*
2300                          * OP_MOVE sreg, dreg
2301                          * OP_MOVE dreg, sreg
2302                          */
2303                         if (last_ins && last_ins->opcode == OP_MOVE &&
2304                             ins->sreg1 == last_ins->dreg &&
2305                             ins->dreg == last_ins->sreg1) {
2306                                 MONO_DEL_INS (ins);
2307                                 continue;
2308                         }
2309                         break;
2310                 }
2311         }
2312 }
2313
2314 /*========================= End of Function ========================*/
2315
2316 /*------------------------------------------------------------------*/
2317 /*                                                                  */
2318 /* Name         - mono_arch_local_regalloc.                         */
2319 /*                                                                  */
2320 /* Function     - We first scan the list of instructions and we     */
2321 /*                save the liveness information of each register    */
2322 /*                (when the register is first used, when its value  */
2323 /*                is set etc.). We also reverse the list of instr-  */
2324 /*                uctions (in the InstList list) because assigning  */
2325 /*                registers backwards allows for more tricks to be  */
2326 /*                used.                                             */
2327 /*                                                                  */
2328 /*------------------------------------------------------------------*/
2329
2330 void
2331 mono_arch_local_regalloc (MonoCompile *cfg, MonoBasicBlock *bb)
2332 {
2333         mono_local_regalloc(cfg, bb);
2334 }
2335
2336 /*========================= End of Function ========================*/
2337
2338 /*------------------------------------------------------------------*/
2339 /*                                                                  */
2340 /* Name         - emit_float_to_int                                 */
2341 /*                                                                  */
2342 /* Function     - Create instructions which will convert a floating */
2343 /*                point value to integer.                           */
2344 /*                                                                  */
2345 /*------------------------------------------------------------------*/
2346
2347 static guchar*
2348 emit_float_to_int (MonoCompile *cfg, guchar *code, int dreg, int sreg, int size, gboolean is_signed)
2349 {
2350         /* sreg is a float, dreg is an integer reg. */
2351         if (is_signed) {
2352                 s390_cfdbr (code, dreg, 5, sreg);
2353                 switch (size) {
2354                         case 1:
2355                                 s390_lhi  (code, s390_r0, 0);
2356                                 s390_lhi  (code, s390_r13, 0xff);
2357                                 s390_ltr  (code, dreg, dreg);
2358                                 s390_jnl  (code, 4);
2359                                 s390_lhi  (code, s390_r0, 0x80);
2360                                 s390_nr   (code, dreg, s390_r13);
2361                                 s390_or   (code, dreg, s390_r0);
2362                                 break;
2363                 }
2364         } else {
2365                 short *o[1];
2366                 s390_basr   (code, s390_r13, 0);
2367                 s390_j      (code, 10);
2368                 s390_llong  (code, 0x41e0000000000000);
2369                 s390_llong  (code, 0x41f0000000000000);
2370                 s390_ldr    (code, s390_f15, sreg);
2371                 s390_cdb    (code, s390_f15, 0, s390_r13, 4);
2372                 s390_jl     (code, 0); CODEPTR(code, o[0]);
2373                 s390_sdb    (code, s390_f15, 0, s390_r13, 12);
2374                 s390_cfdbr  (code, dreg, 7, s390_f15);
2375                 s390_j      (code, 4);
2376                 PTRSLOT(code, o[0]);
2377                 s390_cfdbr  (code, dreg, 5, sreg);
2378                 switch (size) {
2379                         case 1:
2380                                 s390_lhi  (code, s390_r0, 0xff);
2381                                 s390_nr   (code, dreg, s390_r0);
2382                                 break;
2383                         case 2:
2384                                 s390_lhi  (code, s390_r0, -1);
2385                                 s390_srl  (code, s390_r0, 0, 16);
2386                                 s390_nr   (code, dreg, s390_r0);
2387                                 break;
2388                 }
2389         }
2390         return code;
2391 }
2392
2393 /*========================= End of Function ========================*/
2394
2395 /*------------------------------------------------------------------*/
2396 /*                                                                  */
2397 /* Name         - mono_arch_output_basic_block                      */
2398 /*                                                                  */
2399 /* Function     - Perform the "real" work of emitting instructions  */
2400 /*                that will do the work of in the basic block.      */
2401 /*                                                                  */
2402 /*------------------------------------------------------------------*/
2403
2404 void
2405 mono_arch_output_basic_block (MonoCompile *cfg, MonoBasicBlock *bb)
2406 {
2407         MonoInst *ins, *next;
2408         MonoCallInst *call;
2409         guint offset;
2410         guint8 *code = cfg->native_code + cfg->code_len;
2411         guint last_offset = 0;
2412         int max_len, cpos, src2;
2413
2414         if (cfg->opt & MONO_OPT_PEEPHOLE)
2415                 peephole_pass (cfg, bb);
2416
2417         /* we don't align basic blocks of loops on s390 */
2418
2419         if (cfg->verbose_level > 2)
2420                 g_print ("Basic block %d starting at offset 0x%x\n", bb->block_num, bb->native_offset);
2421
2422         cpos = bb->max_offset;
2423
2424         if (cfg->prof_options & MONO_PROFILE_COVERAGE) {
2425                 //MonoCoverageInfo *cov = mono_get_coverage_info (cfg->method);
2426                 //g_assert (!mono_compile_aot);
2427                 //cpos += 6;
2428                 //if (bb->cil_code)
2429                 //      cov->data [bb->dfn].iloffset = bb->cil_code - cfg->cil_code;
2430                 /* this is not thread save, but good enough */
2431                 /* fixme: howto handle overflows? */
2432                 //x86_inc_mem (code, &cov->data [bb->dfn].count);
2433         }
2434
2435         MONO_BB_FOR_EACH_INS (bb, ins) {
2436                 offset = code - cfg->native_code;
2437
2438                 max_len = ((guint8 *)ins_get_spec (ins->opcode))[MONO_INST_LEN];
2439
2440                 if (offset > (cfg->code_size - max_len - 16)) {
2441                         cfg->code_size *= 2;
2442                         cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
2443                         code = cfg->native_code + offset;
2444                 }
2445
2446                 mono_debug_record_line_number (cfg, ins, offset);
2447
2448                 switch (ins->opcode) {
2449                 case OP_STOREI1_MEMBASE_IMM: {
2450                         s390_lhi (code, s390_r0, ins->inst_imm);
2451                         if (s390_is_uimm12(ins->inst_offset))
2452                                 s390_stc (code, s390_r0, 0, ins->inst_destbasereg, ins->inst_offset);
2453                         else {
2454                                 s390_basr (code, s390_r13, 0);
2455                                 s390_j    (code, 4);
2456                                 s390_word (code, ins->inst_offset);
2457                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2458                                 s390_stc  (code, s390_r0, s390_r13, ins->inst_destbasereg, 0);
2459                         }
2460                 }
2461                         break;
2462                 case OP_STOREI2_MEMBASE_IMM: {
2463                         s390_lhi (code, s390_r0, ins->inst_imm);
2464                         if (s390_is_uimm12(ins->inst_offset)) {
2465                                 s390_sth (code, s390_r0, 0, ins->inst_destbasereg, ins->inst_offset);
2466                         } else {
2467                                 s390_basr (code, s390_r13, 0);
2468                                 s390_j    (code, 4);
2469                                 s390_word (code, ins->inst_offset);
2470                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2471                                 s390_sth  (code, s390_r0, s390_r13, ins->inst_destbasereg, 0);
2472                         }
2473                 }
2474                         break;
2475                 case OP_STORE_MEMBASE_IMM:
2476                 case OP_STOREI4_MEMBASE_IMM: {
2477                         if (s390_is_imm16(ins->inst_imm)) {
2478                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2479                         } else {
2480                                 s390_basr (code, s390_r13, 0);
2481                                 s390_j    (code, 4);
2482                                 s390_word (code, ins->inst_imm);
2483                                 s390_l    (code, s390_r0, 0, s390_r13, 4);
2484                         }
2485                         if (s390_is_uimm12(ins->inst_offset)) {
2486                                 s390_st  (code, s390_r0, 0, ins->inst_destbasereg, ins->inst_offset);
2487                         } else {
2488                                 s390_basr (code, s390_r13, 0);
2489                                 s390_j    (code, 4);
2490                                 s390_word (code, ins->inst_offset);
2491                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2492                                 s390_st   (code, s390_r0, s390_r13, ins->inst_destbasereg, 0);
2493                         }
2494                 }
2495                         break;
2496                 case OP_STOREI1_MEMBASE_REG: {
2497                         if (s390_is_uimm12(ins->inst_offset)) {
2498                                 s390_stc  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
2499                         } else {
2500                                 s390_basr (code, s390_r13, 0);
2501                                 s390_j    (code, 4);
2502                                 s390_word (code, ins->inst_offset);
2503                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2504                                 s390_stc  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
2505                         }
2506                 }
2507                         break;
2508                 case OP_STOREI2_MEMBASE_REG: {
2509                         if (s390_is_uimm12(ins->inst_offset)) {
2510                                 s390_sth  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
2511                         } else {
2512                                 s390_basr (code, s390_r13, 0);
2513                                 s390_j    (code, 4);
2514                                 s390_word (code, ins->inst_offset);
2515                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2516                                 s390_sth  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
2517                         }
2518                 }
2519                         break;
2520                 case OP_STORE_MEMBASE_REG:
2521                 case OP_STOREI4_MEMBASE_REG: {
2522                         if (s390_is_uimm12(ins->inst_offset)) {
2523                                 s390_st   (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
2524                         } else {
2525                                 s390_basr (code, s390_r13, 0);
2526                                 s390_j    (code, 4);
2527                                 s390_word (code, ins->inst_offset);
2528                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2529                                 s390_st   (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
2530                         }
2531                 }
2532                         break;
2533                 case CEE_LDIND_I:
2534                 case CEE_LDIND_I4:
2535                 case CEE_LDIND_U4: {
2536                         s390_basr (code, s390_r13, 0);
2537                         s390_j    (code, 4);
2538                         s390_word (code, ins->inst_p0);
2539                         s390_l    (code, s390_r13, 0, s390_r13, 4);
2540                         s390_l    (code, ins->dreg, 0, s390_r13, 0);
2541                 }
2542                         break;
2543                 case OP_LOADU4_MEM:
2544                         g_assert_not_reached ();
2545                         break;
2546                 case OP_LOAD_MEMBASE:
2547                 case OP_LOADI4_MEMBASE:
2548                 case OP_LOADU4_MEMBASE: {
2549                         if (s390_is_uimm12(ins->inst_offset))
2550                                 s390_l    (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
2551                         else {
2552                                 if (s390_is_imm16(ins->inst_offset)) {
2553                                         s390_lhi (code, s390_r13, ins->inst_offset);
2554                                         s390_l   (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
2555                                 } else {
2556                                         s390_basr (code, s390_r13, 0);
2557                                         s390_j    (code, 4);
2558                                         s390_word (code, ins->inst_offset);
2559                                         s390_l    (code, s390_r13, 0, s390_r13, 4);
2560                                         s390_l    (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
2561                                 }
2562                         }
2563                 }
2564                         break;
2565                 case OP_LOADU1_MEMBASE: {
2566                         s390_lhi (code, s390_r0, 0);
2567                         if (s390_is_uimm12(ins->inst_offset))
2568                                 s390_ic   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
2569                         else {
2570                                 s390_basr (code, s390_r13, 0);
2571                                 s390_j    (code, 4);
2572                                 s390_word (code, ins->inst_offset);
2573                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2574                                 s390_ic   (code, s390_r0, s390_r13, ins->inst_basereg, 0);
2575                         }
2576                         s390_lr   (code, ins->dreg, s390_r0);
2577                 }
2578                         break;
2579                 case OP_LOADI1_MEMBASE: {
2580                         s390_lhi (code, s390_r0, 0);
2581                         if (s390_is_uimm12(ins->inst_offset))
2582                                 s390_ic   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
2583                         else {
2584                                 s390_basr (code, s390_r13, 0);
2585                                 s390_j    (code, 4);
2586                                 s390_word (code, ins->inst_offset);
2587                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2588                                 s390_ic   (code, s390_r0, s390_r13, ins->inst_basereg, 0);
2589                         }
2590                         s390_lhi  (code, s390_r13, 0x80);
2591                         s390_nr   (code, s390_r13, s390_r0);
2592                         s390_jz   (code, 5);
2593                         s390_lhi  (code, s390_r13, 0xff00);
2594                         s390_or   (code, s390_r0, s390_r13);
2595                         s390_lr   (code, ins->dreg, s390_r0);
2596                 }
2597                         break;
2598                 case OP_LOADU2_MEMBASE: {
2599                         s390_lhi (code, s390_r0, 0);
2600                         if (s390_is_uimm12(ins->inst_offset))
2601                                 s390_icm  (code, s390_r0, 3, ins->inst_basereg, ins->inst_offset);
2602                         else {
2603                                 s390_basr (code, s390_r13, 0);
2604                                 s390_j    (code, 4);
2605                                 s390_word (code, ins->inst_offset);
2606                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2607                                 s390_ar   (code, s390_r13, ins->inst_basereg);
2608                                 s390_icm  (code, s390_r0, 3, s390_r13, 0);
2609                         }
2610                         s390_lr  (code, ins->dreg, s390_r0);
2611                 }
2612                         break;
2613                 case OP_LOADI2_MEMBASE: {
2614                         s390_lhi (code, s390_r0, 0);
2615                         if (s390_is_uimm12(ins->inst_offset))
2616                                 s390_lh   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
2617                         else {
2618                                 s390_basr (code, s390_r13, 0);
2619                                 s390_j    (code, 4);
2620                                 s390_word (code, ins->inst_offset);
2621                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2622                                 s390_lh   (code, s390_r0, s390_r13, ins->inst_basereg, 0);
2623                         }
2624                         s390_lr  (code, ins->dreg, s390_r0);
2625                 }
2626                         break;
2627                 case CEE_CONV_I1: {
2628                         s390_lhi  (code, s390_r0, 0x80);
2629                         if (ins->dreg != ins->sreg1) {
2630                                 s390_lr   (code, ins->dreg, ins->sreg1);
2631                         }
2632                         s390_nr   (code, s390_r0, ins->sreg1);
2633                         s390_jz   (code, 7);
2634                         s390_lhi  (code, s390_r13, -1);
2635                         s390_sll  (code, s390_r13, 0, 8);
2636                         s390_or   (code, ins->dreg, s390_r13);
2637                 }
2638                         break;
2639                 case CEE_CONV_I2: {
2640                         s390_lhi  (code, s390_r0, 0x80);
2641                         s390_sll  (code, s390_r0, 0, 8);
2642                         if (ins->dreg != ins->sreg1) {
2643                                 s390_lr   (code, ins->dreg, ins->sreg1);
2644                         }
2645                         s390_nr   (code, s390_r0, ins->sreg1);
2646                         s390_jz   (code, 7);
2647                         s390_lhi  (code, s390_r13, -1);
2648                         s390_sll  (code, s390_r13, 0, 16);
2649                         s390_or   (code, ins->dreg, s390_r13);
2650                 }
2651                         break;
2652                 case CEE_CONV_U1: {
2653                         s390_lhi  (code, s390_r0, 0xff);
2654                         if (ins->dreg != ins->sreg1) {
2655                                 s390_lr   (code, ins->dreg, ins->sreg1);
2656                         }
2657                         s390_nr   (code, ins->dreg, s390_r0);
2658                 }
2659                         break;
2660                 case CEE_CONV_U2: {
2661                         s390_lhi  (code, s390_r0, -1);
2662                         s390_sll  (code, s390_r0, 0, 16);
2663                         s390_srl  (code, s390_r0, 0, 16);
2664                         if (ins->dreg != ins->sreg1) {
2665                                 s390_lr   (code, ins->dreg, ins->sreg1);
2666                         }
2667                         s390_nr   (code, ins->dreg, s390_r0);
2668                 }
2669                         break;
2670                 case OP_COMPARE: {
2671                         next = mono_inst_list_next (&ins->node, &bb->ins_list);
2672                         if ((next) &&
2673                             (((next->opcode >= CEE_BNE_UN) &&
2674                               (next->opcode <= CEE_BLT_UN)) ||
2675                              ((next->opcode >= OP_COND_EXC_NE_UN) &&
2676                               (next->opcode <= OP_COND_EXC_LT_UN)) ||
2677                              ((next->opcode == OP_CLT_UN) ||
2678                               (next->opcode == OP_CGT_UN))))
2679                                 s390_clr  (code, ins->sreg1, ins->sreg2);
2680                         else
2681                                 s390_cr   (code, ins->sreg1, ins->sreg2);
2682                 }
2683                         break;
2684                 case OP_COMPARE_IMM: {
2685                         next = mono_inst_list_next (&ins->node, &bb->ins_list);
2686                         if (s390_is_imm16 (ins->inst_imm)) {
2687                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2688                                 if ((next) &&
2689                                     (((next->opcode >= CEE_BNE_UN) &&
2690                                       (next->opcode <= CEE_BLT_UN)) ||
2691                                      ((next->opcode >= OP_COND_EXC_NE_UN) &&
2692                                       (next->opcode <= OP_COND_EXC_LT_UN)) ||
2693                                      ((next->opcode == OP_CLT_UN) ||
2694                                       (next->opcode == OP_CGT_UN))))
2695                                         s390_clr  (code, ins->sreg1, s390_r0);
2696                                 else
2697                                         s390_cr   (code, ins->sreg1, s390_r0);
2698                         }
2699                         else {
2700                                 s390_basr (code, s390_r13, 0);
2701                                 s390_j    (code, 4);
2702                                 s390_word (code, ins->inst_imm);
2703                                 if ((next) &&
2704                                     (((next->opcode >= CEE_BNE_UN) &&
2705                                       (next->opcode <= CEE_BLT_UN)) ||
2706                                      ((next->opcode >= OP_COND_EXC_NE_UN) &&
2707                                       (next->opcode <= OP_COND_EXC_LT_UN)) ||
2708                                      ((next->opcode == OP_CLT_UN) ||
2709                                       (next->opcode == OP_CGT_UN))))
2710                                         s390_cl   (code, ins->sreg1, 0, s390_r13, 4);
2711                                 else
2712                                         s390_c    (code, ins->sreg1, 0, s390_r13, 4);
2713                         }
2714                 }
2715                         break;
2716                 case OP_BREAK: {
2717                         mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS, mono_arch_break);
2718                         s390_brasl (code, s390_r14, 0);
2719                 }
2720                         break;
2721                 case OP_ADDCC: {
2722                         CHECK_SRCDST_COM;
2723                         s390_alr  (code, ins->dreg, src2);
2724                 }
2725                         break;
2726                 case CEE_ADD: {
2727                         CHECK_SRCDST_COM;
2728                         s390_ar   (code, ins->dreg, src2);
2729                 }
2730                         break;
2731                 case OP_ADC: {
2732                         CHECK_SRCDST_COM;
2733                         s390_alcr (code, ins->dreg, src2);
2734                 }
2735                         break;
2736                 case OP_ADD_IMM: {
2737                         if (ins->dreg != ins->sreg1) {
2738                                 s390_lr   (code, ins->dreg, ins->sreg1);
2739                         }
2740                         next = mono_inst_list_next (&ins->node, &bb->ins_list);
2741                         if ((next) &&
2742                             (next->opcode == OP_ADC_IMM)) {
2743                                 s390_basr (code, s390_r13, 0);
2744                                 s390_j    (code, 4);
2745                                 s390_word (code, ins->inst_imm);
2746                                 s390_a (code, ins->dreg, 0, s390_r13, 4);
2747                         } else {
2748                                 if (s390_is_imm16 (ins->inst_imm)) {
2749                                         s390_ahi  (code, ins->dreg, ins->inst_imm);
2750                                 } else {
2751                                         s390_basr (code, s390_r13, 0);
2752                                         s390_j    (code, 4);
2753                                         s390_word (code, ins->inst_imm);
2754                                         s390_a (code, ins->dreg, 0, s390_r13, 4);
2755                                 }
2756                         }
2757                 }
2758                         break;
2759                 case OP_ADDCC_IMM: {
2760                         next = mono_inst_list_next (&ins->node, &bb->ins_list);
2761                         if ((next) &&
2762                             (next->opcode == OP_ADC_IMM)) {
2763                                 s390_basr (code, s390_r13, 0);
2764                                 s390_j    (code, 4);
2765                                 s390_word (code, ins->inst_imm);
2766                                 if (ins->dreg != ins->sreg1) {
2767                                         s390_lr   (code, ins->dreg, ins->sreg1);
2768                                 }
2769                                 s390_al   (code, ins->dreg, 0, s390_r13, 4);
2770                         } else {
2771                                 if (s390_is_imm16 (ins->inst_imm)) {
2772                                         if (ins->dreg != ins->sreg1) {
2773                                                 s390_lr   (code, ins->dreg, ins->sreg1);
2774                                         }
2775                                         s390_lhi  (code, s390_r0, ins->inst_imm);
2776                                         s390_alcr (code, ins->dreg, s390_r0);
2777                                 } else {
2778                                         s390_basr (code, s390_r13, 0);
2779                                         s390_j    (code, 4);
2780                                         s390_word (code, ins->inst_imm);
2781                                         if (ins->dreg != ins->sreg1) {
2782                                                 s390_lr   (code, ins->dreg, ins->sreg1);
2783                                         }
2784                                         s390_al   (code, ins->dreg, 0, s390_r13, 4);
2785                                 }
2786                         }
2787                 }
2788                         break;
2789                 case OP_ADC_IMM: {
2790                         if (s390_is_imm16 (ins->inst_imm)) {
2791                                 if (ins->dreg != ins->sreg1) {
2792                                         s390_lr   (code, ins->dreg, ins->sreg1);
2793                                 }
2794                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2795                                 s390_alcr (code, ins->dreg, s390_r0);
2796                         } else {
2797                                 s390_basr (code, s390_r13, 0);
2798                                 s390_j    (code, 4);
2799                                 s390_word (code, ins->inst_imm);
2800                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2801                                 s390_alcr (code, ins->dreg, s390_r13);
2802                         }
2803                 }
2804                         break;
2805                 case CEE_ADD_OVF: {
2806                         CHECK_SRCDST_COM;
2807                         s390_ar   (code, ins->dreg, src2);
2808                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2809                 }
2810                         break;
2811                 case CEE_ADD_OVF_UN: {
2812                         CHECK_SRCDST_COM;
2813                         s390_alr  (code, ins->dreg, src2);
2814                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
2815                 }
2816                         break;
2817                 case OP_LADD: {
2818                         s390_alr  (code, s390_r0, ins->sreg1);
2819                         s390_jnc  (code, 4);
2820                         s390_ahi  (code, s390_r1, 1);
2821                         s390_ar   (code, s390_r1, ins->sreg2);
2822                         s390_lr   (code, ins->dreg, s390_r0);
2823                         s390_lr   (code, ins->dreg+1, s390_r1);
2824                 }
2825                         break;
2826                 case OP_LADD_OVF: {
2827                         short int *o[1];
2828                         s390_alr  (code, s390_r0, ins->sreg1);
2829                         s390_jnc  (code, 0); CODEPTR(code, o[0]);
2830                         s390_ahi  (code, s390_r1, 1);
2831                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2832                         PTRSLOT   (code, o[0]);
2833                         s390_ar   (code, s390_r1, ins->sreg2);
2834                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2835                         s390_lr   (code, ins->dreg, s390_r0);
2836                         s390_lr   (code, ins->dreg+1, s390_r1);
2837                 }
2838                         break;
2839                 case OP_LADD_OVF_UN: {
2840                         s390_alr  (code, s390_r0, ins->sreg1);
2841                         s390_alcr (code, s390_r1, ins->sreg2);
2842                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
2843                         s390_lr   (code, ins->dreg, s390_r0);
2844                         s390_lr   (code, ins->dreg+1, s390_r1);
2845                 }
2846                         break;
2847                 case OP_ADD_OVF_CARRY: {
2848                         CHECK_SRCDST_COM;
2849                         s390_lhi  (code, s390_r0, 0);
2850                         s390_lr   (code, s390_r1, s390_r0);
2851                         s390_alcr (code, s390_r0, s390_r1);
2852                         s390_ar   (code, ins->dreg, src2);
2853                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2854                         s390_ar   (code, ins->dreg, s390_r0);
2855                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2856                 }
2857                         break;
2858                 case OP_ADD_OVF_UN_CARRY: {
2859                         CHECK_SRCDST_COM;
2860                         s390_alcr (code, ins->dreg, src2);
2861                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
2862                 }
2863                         break;
2864                 case OP_SUBCC: {
2865                         CHECK_SRCDST_NCOM;
2866                         s390_slr (code, ins->dreg, src2);
2867                 }
2868                         break;
2869                 case CEE_SUB: {
2870                         CHECK_SRCDST_NCOM;
2871                         s390_sr   (code, ins->dreg, src2);
2872                 }
2873                         break;
2874                 case OP_SBB: {
2875                         CHECK_SRCDST_NCOM;
2876                         s390_slbr (code, ins->dreg, src2);
2877                 }
2878                         break;
2879                 case OP_SUBCC_IMM: {
2880                         if (s390_is_imm16 (-ins->inst_imm)) {
2881                                 if (ins->dreg != ins->sreg1) {
2882                                         s390_lr   (code, ins->dreg, ins->sreg1);
2883                                 }
2884                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2885                                 s390_slr  (code, ins->dreg, s390_r0);
2886                         } else {
2887                                 s390_basr (code, s390_r13, 0);
2888                                 s390_j    (code, 4);
2889                                 s390_word (code, ins->inst_imm);
2890                                 if (ins->dreg != ins->sreg1) {
2891                                         s390_lr   (code, ins->dreg, ins->sreg1);
2892                                 }
2893                                 s390_sl   (code, ins->dreg, 0, s390_r13, 4);
2894                         }
2895                 }
2896                         break;
2897                 case OP_SUB_IMM: {
2898                         if (s390_is_imm16 (-ins->inst_imm)) {
2899                                 if (ins->dreg != ins->sreg1) {
2900                                         s390_lr   (code, ins->dreg, ins->sreg1);
2901                                 }
2902                                 s390_ahi  (code, ins->dreg, -ins->inst_imm);
2903                         } else {
2904                                 s390_basr (code, s390_r13, 0);
2905                                 s390_j    (code, 4);
2906                                 s390_word (code, ins->inst_imm);
2907                                 if (ins->dreg != ins->sreg1) {
2908                                         s390_lr   (code, ins->dreg, ins->sreg1);
2909                                 }
2910                                 s390_s    (code, ins->dreg, 0, s390_r13, 4);
2911                         }
2912                 }
2913                         break;
2914                 case OP_SBB_IMM: {
2915                         if (ins->dreg != ins->sreg1) {
2916                                 s390_lr    (code, ins->dreg, ins->sreg1);
2917                         }
2918                         if (s390_is_imm16 (-ins->inst_imm)) {
2919                                 s390_lhi   (code, s390_r0, ins->inst_imm);
2920                                 s390_slbr  (code, ins->dreg, s390_r0);
2921                         } else {
2922                                 s390_basr (code, s390_r13, 0);
2923                                 s390_j    (code, 4);
2924                                 s390_word (code, ins->inst_imm);
2925                                 s390_slb  (code, ins->dreg, 0, s390_r13, 4);
2926                         }
2927                 }
2928                         break;
2929                 case CEE_SUB_OVF: {
2930                         CHECK_SRCDST_NCOM;
2931                         s390_sr   (code, ins->dreg, src2);
2932                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2933                 }
2934                         break;
2935                 case CEE_SUB_OVF_UN: {
2936                         CHECK_SRCDST_NCOM;
2937                         s390_slr  (code, ins->dreg, src2);
2938                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
2939                 }
2940                         break;
2941                 case OP_LSUB: {
2942                         s390_lr   (code, s390_r14, ins->sreg2);
2943                         s390_slr  (code, s390_r0, ins->sreg1);
2944                         s390_jnl  (code, 4);
2945                         s390_ahi  (code, s390_r14, 1);
2946                         s390_sr   (code, s390_r1, s390_r14);
2947                         s390_lr   (code, ins->dreg, s390_r0);
2948                         s390_lr   (code, ins->dreg+1, s390_r1);
2949                 }
2950                         break;
2951                 case OP_LSUB_OVF: {
2952                         short int *o[1];
2953                         s390_lr   (code, s390_r14, ins->sreg2);
2954                         s390_slr  (code, s390_r0, ins->sreg1);
2955                         s390_jnl  (code, 0); CODEPTR(code, o[0]);
2956                         s390_ahi  (code, s390_r14, 1);
2957                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2958                         PTRSLOT   (code, o[0]);
2959                         s390_sr   (code, s390_r1, s390_r14);
2960                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2961                         s390_lr   (code, ins->dreg, s390_r0);
2962                         s390_lr   (code, ins->dreg+1, s390_r1);
2963                 }
2964                         break;
2965                 case OP_LSUB_OVF_UN: {
2966                         s390_slr  (code, s390_r0, ins->sreg1);
2967                         s390_slbr (code, s390_r1, ins->sreg2);
2968                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, "OverflowException");
2969                         s390_lr   (code, ins->dreg, s390_r0);
2970                         s390_lr   (code, ins->dreg+1, s390_r1);
2971                 }
2972                         break;
2973                 case OP_SUB_OVF_CARRY: {
2974                         CHECK_SRCDST_NCOM;
2975                         s390_lhi  (code, s390_r0, 0);
2976                         s390_lr   (code, s390_r1, s390_r0);
2977                         s390_slbr (code, s390_r0, s390_r1);
2978                         s390_sr   (code, ins->dreg, src2);
2979                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2980                         s390_ar   (code, ins->dreg, s390_r0);
2981                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2982                 }
2983                         break;
2984                 case OP_SUB_OVF_UN_CARRY: {
2985                         CHECK_SRCDST_NCOM;
2986                         s390_slbr (code, ins->dreg, src2);
2987                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
2988                 }
2989                         break;
2990                 case CEE_AND: {
2991                         if (ins->sreg1 == ins->dreg) {
2992                                 s390_nr   (code, ins->dreg, ins->sreg2);
2993                         }
2994                         else {
2995                                 if (ins->sreg2 == ins->dreg) {
2996                                         s390_nr  (code, ins->dreg, ins->sreg1);
2997                                 }
2998                                 else {
2999                                         s390_lr  (code, ins->dreg, ins->sreg1);
3000                                         s390_nr  (code, ins->dreg, ins->sreg2);
3001                                 }
3002                         }
3003                 }
3004                         break;
3005                 case OP_AND_IMM: {
3006                         if (s390_is_imm16 (ins->inst_imm)) {
3007                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3008                                 if (ins->dreg != ins->sreg1) {
3009                                         s390_lr   (code, ins->dreg, ins->sreg1);
3010                                 }
3011                                 s390_nr   (code, ins->dreg, s390_r0);
3012                         } else {
3013                                 s390_basr (code, s390_r13, 0);
3014                                 s390_j    (code, 4);
3015                                 s390_word (code, ins->inst_imm);
3016                                 if (ins->dreg != ins->sreg1) {
3017                                         s390_lr   (code, ins->dreg, ins->sreg1);
3018                                 }
3019                                 s390_n    (code, ins->dreg, 0, s390_r13, 4);
3020                         }
3021                 }
3022                         break;
3023                 case CEE_DIV: {
3024                         s390_lr   (code, s390_r0, ins->sreg1);
3025                         s390_srda (code, s390_r0, 0, 32);
3026                         s390_dr   (code, s390_r0, ins->sreg2);
3027                         s390_lr   (code, ins->dreg, s390_r1);
3028                 }
3029                         break;
3030                 case CEE_DIV_UN: {
3031                         s390_lr   (code, s390_r0, ins->sreg1);
3032                         s390_srdl (code, s390_r0, 0, 32);
3033                         s390_dlr  (code, s390_r0, ins->sreg2);
3034                         s390_lr   (code, ins->dreg, s390_r1);
3035                 }
3036                         break;
3037                 case OP_DIV_IMM: {
3038                         if (s390_is_imm16 (ins->inst_imm)) {
3039                                 s390_lhi  (code, s390_r13, ins->inst_imm);
3040                                 s390_lr   (code, s390_r0, ins->sreg1);
3041                         } else {
3042                                 s390_basr (code, s390_r13, 0);
3043                                 s390_j    (code, 4);
3044                                 s390_word (code, ins->inst_imm);
3045                                 s390_lr   (code, s390_r0, ins->sreg1);
3046                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3047                         }
3048                         s390_srda (code, s390_r0, 0, 32);
3049                         s390_dr   (code, s390_r0, s390_r13);
3050                         s390_lr   (code, ins->dreg, s390_r1);
3051                 }
3052                         break;
3053                 case CEE_REM: {
3054                         s390_lr   (code, s390_r0, ins->sreg1);
3055                         s390_srda (code, s390_r0, 0, 32);
3056                         s390_dr   (code, s390_r0, ins->sreg2);
3057                         s390_lr   (code, ins->dreg, s390_r0);
3058                         break;
3059                 case CEE_REM_UN:
3060                         s390_lr   (code, s390_r0, ins->sreg1);
3061                         s390_srdl (code, s390_r0, 0, 32);
3062                         s390_dlr  (code, s390_r0, ins->sreg2);
3063                         s390_lr   (code, ins->dreg, s390_r0);
3064                 }
3065                         break;
3066                 case OP_REM_IMM: {
3067                         if (s390_is_imm16 (ins->inst_imm)) {
3068                                 s390_lhi  (code, s390_r13, ins->inst_imm);
3069                                 s390_lr   (code, s390_r0, ins->sreg1);
3070                         } else {
3071                                 s390_basr (code, s390_r13, 0);
3072                                 s390_j    (code, 4);
3073                                 s390_word (code, ins->inst_imm);
3074                                 s390_lr   (code, s390_r0, ins->sreg1);
3075                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3076                         }
3077                         s390_srda (code, s390_r0, 0, 32);
3078                         s390_dr   (code, s390_r0, s390_r13);
3079                         s390_lr   (code, ins->dreg, s390_r0);
3080                 }
3081                         break;
3082                 case CEE_OR: {
3083                         if (ins->sreg1 == ins->dreg) {
3084                                 s390_or   (code, ins->dreg, ins->sreg2);
3085                         }
3086                         else {
3087                                 if (ins->sreg2 == ins->dreg) {
3088                                         s390_or  (code, ins->dreg, ins->sreg1);
3089                                 }
3090                                 else {
3091                                         s390_lr  (code, ins->dreg, ins->sreg1);
3092                                         s390_or  (code, ins->dreg, ins->sreg2);
3093                                 }
3094                         }
3095                 }
3096                         break;
3097                 case OP_OR_IMM: {
3098                         if (s390_is_imm16 (ins->inst_imm)) {
3099                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3100                                 if (ins->dreg != ins->sreg1) {
3101                                         s390_lr   (code, ins->dreg, ins->sreg1);
3102                                 }
3103                                 s390_or   (code, ins->dreg, s390_r0);
3104                         } else {
3105                                 s390_basr (code, s390_r13, 0);
3106                                 s390_j    (code, 4);
3107                                 s390_word (code, ins->inst_imm);
3108                                 if (ins->dreg != ins->sreg1) {
3109                                         s390_lr   (code, ins->dreg, ins->sreg1);
3110                                 }
3111                                 s390_o    (code, ins->dreg, 0, s390_r13, 4);
3112                         }
3113                 }
3114                         break;
3115                 case CEE_XOR: {
3116                         if (ins->sreg1 == ins->dreg) {
3117                                 s390_xr   (code, ins->dreg, ins->sreg2);
3118                         }
3119                         else {
3120                                 if (ins->sreg2 == ins->dreg) {
3121                                         s390_xr  (code, ins->dreg, ins->sreg1);
3122                                 }
3123                                 else {
3124                                         s390_lr  (code, ins->dreg, ins->sreg1);
3125                                         s390_xr  (code, ins->dreg, ins->sreg2);
3126                                 }
3127                         }
3128                 }
3129                         break;
3130                 case OP_XOR_IMM: {
3131                         if (s390_is_imm16 (ins->inst_imm)) {
3132                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3133                                 if (ins->dreg != ins->sreg1) {
3134                                         s390_lr   (code, ins->dreg, ins->sreg1);
3135                                 }
3136                                 s390_xr   (code, ins->dreg, s390_r0);
3137                         } else {
3138                                 s390_basr (code, s390_r13, 0);
3139                                 s390_j    (code, 4);
3140                                 s390_word (code, ins->inst_imm);
3141                                 if (ins->dreg != ins->sreg1) {
3142                                         s390_lr   (code, ins->dreg, ins->sreg1);
3143                                 }
3144                                 s390_x    (code, ins->dreg, 0, s390_r13, 4);
3145                         }
3146                 }
3147                         break;
3148                 case CEE_SHL: {
3149                         CHECK_SRCDST_NCOM;
3150                         s390_sll  (code, ins->dreg, src2, 0);
3151                 }
3152                         break;
3153                 case OP_SHL_IMM: {
3154                         if (ins->sreg1 != ins->dreg) {
3155                                 s390_lr   (code, ins->dreg, ins->sreg1);
3156                         }
3157                         s390_sll  (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3158                 }
3159                         break;
3160                 case CEE_SHR: {
3161                         CHECK_SRCDST_NCOM;
3162                         s390_sra  (code, ins->dreg, src2, 0);
3163                 }
3164                         break;
3165                 case OP_SHR_IMM: {
3166                         if (ins->sreg1 != ins->dreg) {
3167                                 s390_lr   (code, ins->dreg, ins->sreg1);
3168                         }
3169                         s390_sra  (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3170                 }
3171                         break;
3172                 case OP_SHR_UN_IMM: {
3173                         if (ins->sreg1 != ins->dreg) {
3174                                 s390_lr   (code, ins->dreg, ins->sreg1);
3175                         }
3176                         s390_srl  (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3177                 }
3178                         break;
3179                 case CEE_SHR_UN: {
3180                         CHECK_SRCDST_NCOM;
3181                         s390_srl  (code, ins->dreg, src2, 0);
3182                 }
3183                         break;
3184                 case CEE_NOT: {
3185                         if (ins->sreg1 != ins->dreg) {
3186                                 s390_lr   (code, ins->dreg, ins->sreg1);
3187                         }
3188                         s390_lhi (code, s390_r0, -1);
3189                         s390_xr  (code, ins->dreg, s390_r0);
3190                 }
3191                         break;
3192                 case CEE_NEG: {
3193                         s390_lcr (code, ins->dreg, ins->sreg1);
3194                 }
3195                         break;
3196                 case CEE_MUL: {
3197                         if (ins->sreg1 == ins->dreg) {
3198                                 s390_msr  (code, ins->dreg, ins->sreg2);
3199                         }
3200                         else {
3201                                 if (ins->sreg2 == ins->dreg) {
3202                                         s390_msr (code, ins->dreg, ins->sreg1);
3203                                 }
3204                                 else {
3205                                         s390_lr  (code, ins->dreg, ins->sreg1);
3206                                         s390_msr (code, ins->dreg, ins->sreg2);
3207                                 }
3208                         }
3209                 }
3210                         break;
3211                 case OP_MUL_IMM: {
3212                         if (s390_is_imm16 (ins->inst_imm)) {
3213                                 s390_lhi  (code, s390_r13, ins->inst_imm);
3214                         } else {
3215                                 s390_basr (code, s390_r13, 0);
3216                                 s390_j    (code, 4);
3217                                 s390_word (code, ins->inst_imm);
3218 //                              if (ins->dreg != ins->sreg1) {
3219 //                                      s390_lr   (code, ins->dreg, ins->sreg1);
3220 //                              }
3221                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3222                         }
3223                         if (ins->dreg != ins->sreg1) {
3224                                 s390_lr   (code, ins->dreg, ins->sreg1);
3225                         }
3226                         s390_msr  (code, ins->dreg, s390_r13);
3227                 }
3228                         break;
3229                 case CEE_MUL_OVF: {
3230                         short int *o[2];
3231                         s390_ltr  (code, s390_r1, ins->sreg1);
3232                         s390_jz   (code, 0); CODEPTR(code, o[0]);
3233                         s390_ltr  (code, s390_r0, ins->sreg2);
3234                         s390_jnz  (code, 6);
3235                         s390_lhi  (code, s390_r1, 0);
3236                         s390_j    (code, 0); CODEPTR(code, o[1]);
3237                         s390_xr   (code, s390_r0, s390_r1);
3238                         s390_msr  (code, s390_r1, ins->sreg2);
3239                         s390_xr   (code, s390_r0, s390_r1);
3240                         s390_srl  (code, s390_r0, 0, 31);
3241                         s390_ltr  (code, s390_r0, s390_r0);
3242                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3243                         PTRSLOT   (code, o[0]);
3244                         PTRSLOT   (code, o[1]);
3245                         s390_lr   (code, ins->dreg, s390_r1);
3246                 }
3247                         break;
3248                 case CEE_MUL_OVF_UN: {
3249                         s390_lhi  (code, s390_r0, 0);
3250                         s390_lr   (code, s390_r1, ins->sreg1);
3251                         s390_mlr  (code, s390_r0, ins->sreg2);
3252                         s390_ltr  (code, s390_r0, s390_r0);
3253                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3254                         s390_lr   (code, ins->dreg, s390_r1);
3255                 }
3256                         break;
3257                 case OP_LMUL: {
3258                         s390_l    (code, s390_r0, 0, ins->sreg1, 4);
3259                         s390_srda (code, s390_r0, 0, 32);
3260                         s390_m    (code, s390_r0, 0, ins->sreg2, 4);
3261                         s390_l    (code, s390_r0, 0, ins->sreg1, 4);
3262                         s390_srl  (code, s390_r0, 0, 31);
3263                         s390_a    (code, s390_r0, 0, ins->sreg1, 0);
3264                         s390_l    (code, s390_r13, 0, ins->sreg2, 0);
3265                         s390_srl  (code, s390_r13, 0, 31);
3266                         s390_ms   (code, s390_r13, 0, ins->sreg1, 4);
3267                         s390_ar   (code, s390_r0, s390_r13);
3268                         s390_st   (code, s390_r0, 0, ins->dreg, 0);
3269                         s390_st   (code, s390_r1, 0, ins->dreg, 4);
3270                 }
3271                         break;
3272                 case OP_ICONST:
3273                 case OP_SETREGIMM: {
3274                         if (s390_is_imm16(ins->inst_c0)) {
3275                                 s390_lhi  (code, ins->dreg, ins->inst_c0);
3276                         } else {
3277                                 s390_basr (code, s390_r13, 0);
3278                                 s390_j    (code, 4);
3279                                 s390_word (code, ins->inst_c0);
3280                                 s390_l    (code, ins->dreg, 0, s390_r13, 4);
3281                         }
3282                 }
3283                         break;
3284                 case OP_AOTCONST: {
3285                         s390_basr (code, s390_r13, 0);
3286                         s390_j    (code, 4);
3287                         mono_add_patch_info (cfg, code - cfg->native_code,
3288                                 (MonoJumpInfoType)ins->inst_i1, ins->inst_p0);
3289                         s390_word (code, 0);
3290                         s390_l    (code,ins->dreg, 0, s390_r13, 4);
3291                 }
3292                         break;
3293                 case CEE_CONV_I4:
3294                 case CEE_CONV_U4:
3295                 case OP_MOVE:
3296                 case OP_SETREG: {
3297                         if (ins->dreg != ins->sreg1) {
3298                                 s390_lr (code, ins->dreg, ins->sreg1);
3299                         }
3300                 }
3301                         break;
3302                 case OP_SETLRET: {
3303                         int saved = ins->sreg1;
3304                         if (ins->sreg1 == s390_r2) {
3305                                 s390_lr (code, s390_r0, ins->sreg1);
3306                                 saved = s390_r0;
3307                         }
3308                         if (ins->sreg2 != s390_r2)
3309                                 s390_lr (code, s390_r2, ins->sreg2);
3310                         if (saved != s390_r3)
3311                                 s390_lr (code, s390_r3, saved);
3312                         break;
3313                 }
3314                 case OP_SETFREG:
3315                 case OP_FMOVE: {
3316                         if (ins->dreg != ins->sreg1) {
3317                                 s390_ldr   (code, ins->dreg, ins->sreg1);
3318                         }
3319                 }
3320                         break;
3321                 case OP_S390_SETF4RET: {
3322                         s390_ledbr (code, ins->dreg, ins->sreg1);
3323                 }
3324                         break;
3325                 case OP_TLS_GET: {
3326                         if (s390_is_imm16 (ins->inst_offset)) {
3327                                 s390_lhi (code, s390_r13, ins->inst_offset);
3328                         } else {
3329                                 s390_bras (code, s390_r13, 0);
3330                                 s390_j    (code, 4);
3331                                 s390_word (code, ins->inst_offset);
3332                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3333                         }
3334                         s390_ear (code, s390_r1, 0);
3335                         s390_l   (code, ins->dreg, s390_r13, s390_r1, 0);
3336                 }
3337                         break;
3338                 case OP_FCONV_TO_R4: {
3339                         NOT_IMPLEMENTED("OP_FCONV_TO_R4");
3340                         next = mono_inst_list_next (&ins->node, &bb->ins_list);
3341                         if ((next) &&
3342                              (next->opcode != OP_FMOVE) &&
3343                              (next->opcode != OP_STORER4_MEMBASE_REG))
3344                                 s390_ledbr (code, ins->dreg, ins->sreg1);
3345                 }
3346                         break;
3347                 case OP_JMP: {
3348                         if (cfg->method->save_lmf)
3349                                 restoreLMF(code, cfg->frame_reg, cfg->stack_usage);
3350
3351                         if (cfg->flags & MONO_CFG_HAS_TAIL) {
3352                                 code = emit_load_volatile_registers(code, cfg);
3353                         }
3354
3355                         code = backUpStackPtr(cfg, code, STK_BASE);
3356                         s390_l   (code, s390_r14, 0, STK_BASE, S390_RET_ADDR_OFFSET);
3357                         mono_add_patch_info (cfg, code - cfg->native_code,
3358                                              MONO_PATCH_INFO_METHOD_JUMP,
3359                                              ins->inst_p0);
3360                         s390_jcl (code, S390_CC_UN, 0);
3361                 }
3362                         break;
3363                 case OP_CHECK_THIS: {
3364                         /* ensure ins->sreg1 is not NULL */
3365                         s390_icm (code, s390_r0, 15, ins->sreg1, 0);
3366                 }
3367                         break;
3368                 case OP_ARGLIST: {
3369                         int offset = cfg->sig_cookie + cfg->stack_usage;
3370
3371                         if (s390_is_imm16 (offset))
3372                                 s390_lhi  (code, s390_r0, offset);
3373                         else {
3374                                 s390_basr (code, s390_r13, 0);
3375                                 s390_j    (code, 4);
3376                                 s390_word (code, offset);
3377                                 s390_l    (code, s390_r0, 0, s390_r13, 0);
3378                         }
3379                         s390_ar   (code, s390_r0, cfg->frame_reg);
3380                         s390_st   (code, s390_r0, 0, ins->sreg1, 0);
3381                 }
3382                         break;
3383                 case OP_FCALL: {
3384                         call = (MonoCallInst*)ins;
3385                         if (ins->flags & MONO_INST_HAS_METHOD)
3386                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_METHOD,
3387                                                      call->method);
3388                         else
3389                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS,
3390                                                      call->fptr);
3391                         s390_brasl (code, s390_r14, 0);
3392                         if (call->signature->ret->type == MONO_TYPE_R4)
3393                                 s390_ldebr (code, s390_f0, s390_f0);
3394                 }
3395                         break;
3396                 case OP_LCALL:
3397                 case OP_VCALL:
3398                 case OP_VOIDCALL:
3399                 case CEE_CALL: {
3400                         call = (MonoCallInst*)ins;
3401                         if (ins->flags & MONO_INST_HAS_METHOD)
3402                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_METHOD, call->method);
3403                         else
3404                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS, call->fptr);
3405                         s390_brasl (code, s390_r14, 0);
3406                 }
3407                         break;
3408                 case OP_FCALL_REG: {
3409                         call = (MonoCallInst*)ins;
3410                         s390_lr   (code, s390_r1, ins->sreg1);
3411                         s390_basr (code, s390_r14, s390_r1);
3412                         if (call->signature->ret->type == MONO_TYPE_R4)
3413                                 s390_ldebr (code, s390_f0, s390_f0);
3414                 }
3415                         break;
3416                 case OP_LCALL_REG:
3417                 case OP_VCALL_REG:
3418                 case OP_VOIDCALL_REG:
3419                 case OP_CALL_REG: {
3420                         s390_lr   (code, s390_r1, ins->sreg1);
3421                         s390_basr (code, s390_r14, s390_r1);
3422                 }
3423                         break;
3424                 case OP_FCALL_MEMBASE: {
3425                         call = (MonoCallInst*)ins;
3426                         s390_l    (code, s390_r1, 0, ins->sreg1, ins->inst_offset);
3427                         s390_basr (code, s390_r14, s390_r1);
3428                         if (call->signature->ret->type == MONO_TYPE_R4)
3429                                 s390_ldebr (code, s390_f0, s390_f0);
3430                 }
3431                         break;
3432                 case OP_LCALL_MEMBASE:
3433                 case OP_VCALL_MEMBASE:
3434                 case OP_VOIDCALL_MEMBASE:
3435                 case OP_CALL_MEMBASE: {
3436                         s390_l    (code, s390_r1, 0, ins->sreg1, ins->inst_offset);
3437                         s390_basr (code, s390_r14, s390_r1);
3438                 }
3439                         break;
3440                 case OP_OUTARG:
3441                         g_assert_not_reached ();
3442                         break;
3443                 case OP_LOCALLOC: {
3444                         /*------------------------------------------*/
3445                         /* To allocate space on the stack we have   */
3446                         /* to allow room for parameters passed in   */
3447                         /* calls, the backchain pointer and round   */
3448                         /* it to our stack alignment requirements   */
3449                         /*------------------------------------------*/
3450                         int alloca_skip = S390_MINIMAL_STACK_SIZE + cfg->param_area;
3451                         int area_offset = S390_ALIGN(alloca_skip, S390_STACK_ALIGNMENT);
3452                         s390_lr   (code, s390_r1, ins->sreg1);
3453                         if (ins->flags & MONO_INST_INIT)
3454                                 s390_lr   (code, s390_r0, ins->sreg1);
3455                         s390_ahi  (code, s390_r1, 14);
3456                         s390_srl  (code, s390_r1, 0, 3);
3457                         s390_sll  (code, s390_r1, 0, 3);
3458                         if (cfg->method->save_lmf) {
3459                                 /*----------------------------------*/
3460                                 /* we have to adjust lmf ebp value  */
3461                                 /*----------------------------------*/
3462                                 int lmfOffset = cfg->stack_usage - sizeof(MonoLMF);
3463
3464                                 s390_lr (code, s390_r13, cfg->frame_reg);
3465                                 if (s390_is_uimm16(lmfOffset))
3466                                         s390_ahi   (code, s390_r13, lmfOffset);
3467                                 else {
3468                                         s390_basr (code, s390_r14, 0);
3469                                         s390_j    (code, 4);
3470                                         s390_word (code, lmfOffset);
3471                                         s390_a    (code, s390_r13, 0, s390_r14, 4);
3472                                 }
3473                                 s390_lr (code, s390_r14, STK_BASE);
3474                                 s390_sr (code, s390_r14, s390_r1);
3475                                 s390_st (code, s390_r14, 0, s390_r13,
3476                                          G_STRUCT_OFFSET(MonoLMF, ebp));
3477                         }
3478                         s390_l    (code, s390_r13, 0, STK_BASE, 0);
3479                         s390_sr   (code, STK_BASE, s390_r1);
3480                         s390_st   (code, s390_r13, 0, STK_BASE, 0);
3481                         s390_la   (code, ins->dreg, 0, STK_BASE, area_offset);
3482                         s390_srl  (code, ins->dreg, 0, 3);
3483                         s390_sll  (code, ins->dreg, 0, 3);
3484                         if (ins->flags & MONO_INST_INIT) {
3485                                 s390_lr   (code, s390_r1, s390_r0);
3486                                 s390_lr   (code, s390_r0, ins->dreg);
3487                                 s390_lr   (code, s390_r14, s390_r12);
3488                                 s390_lhi  (code, s390_r13, 0);
3489                                 s390_mvcle(code, s390_r0, s390_r12, 0, 0);
3490                                 s390_jo   (code, -2);
3491                                 s390_lr   (code, s390_r12, s390_r14);
3492                         }
3493                 }
3494                         break;
3495                 case CEE_RET: {
3496                         s390_br  (code, s390_r14);
3497                 }
3498                         break;
3499                 case OP_THROW: {
3500                         s390_lr (code, s390_r2, ins->sreg1);
3501                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD,
3502                                              (gpointer)"mono_arch_throw_exception");
3503                         s390_brasl (code, s390_r14, 0);
3504                 }
3505                         break;
3506                 case OP_RETHROW: {
3507                         s390_lr (code, s390_r2, ins->sreg1);
3508                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD,
3509                                              (gpointer)"mono_arch_rethrow_exception");
3510                         s390_brasl (code, s390_r14, 0);
3511                 }
3512                         break;
3513                 case OP_START_HANDLER: {
3514                         if (s390_is_uimm12 (ins->inst_left->inst_offset)) {
3515                                 s390_st   (code, s390_r14, 0,
3516                                            ins->inst_left->inst_basereg,
3517                                            ins->inst_left->inst_offset);
3518                         } else {
3519                                 s390_basr (code, s390_r13, 0);
3520                                 s390_j    (code, 4);
3521                                 s390_word (code, ins->inst_left->inst_offset);
3522                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3523                                 s390_st   (code, s390_r14, s390_r13,
3524                                            ins->inst_left->inst_basereg, 0);
3525                         }
3526                 }
3527                         break;
3528                 case OP_ENDFILTER: {
3529                         if (ins->sreg1 != s390_r2)
3530                                 s390_lr (code, s390_r2, ins->sreg1);
3531                         if (s390_is_uimm12 (ins->inst_left->inst_offset)) {
3532                                 s390_l  (code, s390_r14, 0, ins->inst_left->inst_basereg,
3533                                          ins->inst_left->inst_offset);
3534                         } else {
3535                                 s390_basr (code, s390_r13, 0);
3536                                 s390_j    (code, 4);
3537                                 s390_word (code, ins->inst_left->inst_offset);
3538                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3539                                 s390_l    (code, s390_r14, s390_r13,
3540                                            ins->inst_left->inst_basereg, 0);
3541                         }
3542                         s390_br  (code, s390_r14);
3543                 }
3544                         break;
3545                 case OP_ENDFINALLY: {
3546                         if (s390_is_uimm12 (ins->inst_left->inst_offset)) {
3547                                 s390_l  (code, s390_r14, 0, ins->inst_left->inst_basereg,
3548                                          ins->inst_left->inst_offset);
3549                         } else {
3550                                 s390_basr (code, s390_r13, 0);
3551                                 s390_j    (code, 4);
3552                                 s390_word (code, ins->inst_left->inst_offset);
3553                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3554                                 s390_l    (code, s390_r14, s390_r13,
3555                                            ins->inst_left->inst_basereg, 0);
3556                         }
3557                         s390_br  (code, s390_r14);
3558                 }
3559                         break;
3560                 case OP_CALL_HANDLER: {
3561                         mono_add_patch_info (cfg, code-cfg->native_code,
3562                                              MONO_PATCH_INFO_BB, ins->inst_target_bb);
3563                         s390_brasl (code, s390_r14, 0);
3564                 }
3565                         break;
3566                 case OP_LABEL: {
3567                         ins->inst_c0 = code - cfg->native_code;
3568                 }
3569                         break;
3570                 case OP_BR:
3571                         EMIT_UNCOND_BRANCH(ins);
3572                         break;
3573                 case OP_BR_REG: {
3574                         s390_br  (code, ins->sreg1);
3575                 }
3576                         break;
3577                 case OP_CEQ: {
3578                         s390_lhi (code, ins->dreg, 1);
3579                         s390_jz  (code, 4);
3580                         s390_lhi (code, ins->dreg, 0);
3581                 }
3582                         break;
3583                 case OP_CLT: {
3584                         s390_lhi (code, ins->dreg, 1);
3585                         s390_jl  (code, 4);
3586                         s390_lhi (code, ins->dreg, 0);
3587                 }
3588                         break;
3589                 case OP_CLT_UN: {
3590                         s390_lhi (code, ins->dreg, 1);
3591                         s390_jlo (code, 4);
3592                         s390_lhi (code, ins->dreg, 0);
3593                 }
3594                         break;
3595                 case OP_CGT: {
3596                         s390_lhi (code, ins->dreg, 1);
3597                         s390_jh  (code, 4);
3598                         s390_lhi (code, ins->dreg, 0);
3599                 }
3600                         break;
3601                 case OP_CGT_UN: {
3602                         s390_lhi (code, ins->dreg, 1);
3603                         s390_jho (code, 4);
3604                         s390_lhi (code, ins->dreg, 0);
3605                 }
3606                         break;
3607                 case OP_COND_EXC_EQ:
3608                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_EQ, ins->inst_p1);
3609                         break;
3610                 case OP_COND_EXC_NE_UN:
3611                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NE, ins->inst_p1);
3612                         break;
3613                 case OP_COND_EXC_LT:
3614                 case OP_COND_EXC_LT_UN:
3615                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, ins->inst_p1);
3616                         break;
3617                 case OP_COND_EXC_GT:
3618                 case OP_COND_EXC_GT_UN:
3619                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GT, ins->inst_p1);
3620                         break;
3621                 case OP_COND_EXC_GE:
3622                 case OP_COND_EXC_GE_UN:
3623                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GE, ins->inst_p1);
3624                         break;
3625                 case OP_COND_EXC_LE:
3626                 case OP_COND_EXC_LE_UN:
3627                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LE, ins->inst_p1);
3628                         break;
3629                 case OP_COND_EXC_OV:
3630                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, ins->inst_p1);
3631                         break;
3632                 case OP_COND_EXC_NO:
3633                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NO, ins->inst_p1);
3634                         break;
3635                 case OP_COND_EXC_C:
3636                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, ins->inst_p1);
3637                         break;
3638                 case OP_COND_EXC_NC:
3639                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, ins->inst_p1);
3640                         break;
3641                 case CEE_BEQ:
3642                         EMIT_COND_BRANCH (ins, S390_CC_EQ);
3643                         break;
3644                 case CEE_BNE_UN:
3645                         EMIT_COND_BRANCH (ins, S390_CC_NE);
3646                         break;
3647                 case CEE_BLT:
3648                 case CEE_BLT_UN:
3649                         EMIT_COND_BRANCH (ins, S390_CC_LT);
3650                         break;
3651                 case CEE_BGT:
3652                 case CEE_BGT_UN:
3653                         EMIT_COND_BRANCH (ins, S390_CC_GT);
3654                         break;
3655                 case CEE_BGE:
3656                 case CEE_BGE_UN:
3657                         EMIT_COND_BRANCH (ins, S390_CC_GE);
3658                         break;
3659                 case CEE_BLE:
3660                 case CEE_BLE_UN:
3661                         EMIT_COND_BRANCH (ins, S390_CC_LE);
3662                         break;
3663
3664                 /* floating point opcodes */
3665                 case OP_R8CONST: {
3666                         if (*((float *) ins->inst_p0) == 0) {
3667                                 s390_lzdr (code, ins->dreg);
3668                         } else {
3669                                 s390_basr  (code, s390_r13, 0);
3670                                 s390_j     (code, 4);
3671                                 s390_word  (code, ins->inst_p0);
3672                                 s390_l     (code, s390_r13, 0, s390_r13, 4);
3673                                 s390_ld    (code, ins->dreg, 0, s390_r13, 0);
3674                         }
3675                 }
3676                         break;
3677                 case OP_R4CONST: {
3678                         if (*((float *) ins->inst_p0) == 0) {
3679                                 s390_lzdr (code, ins->dreg);
3680                         } else {
3681                                 s390_basr (code, s390_r13, 0);
3682                                 s390_j    (code, 4);
3683                                 s390_word (code, ins->inst_p0);
3684                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3685                                 s390_ldeb (code, ins->dreg, 0, s390_r13, 0);
3686                         }
3687                 }
3688                         break;
3689                 case OP_STORER8_MEMBASE_REG: {
3690                         if (s390_is_uimm12(ins->inst_offset)) {
3691                                 s390_std  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
3692                         } else {
3693                                 s390_basr (code, s390_r13, 0);
3694                                 s390_j    (code, 4);
3695                                 s390_word (code, ins->inst_offset);
3696                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3697                                 s390_std  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
3698                         }
3699                 }
3700                         break;
3701                 case OP_LOADR8_MEMBASE: {
3702                         if (s390_is_uimm12(ins->inst_offset)) {
3703                                 s390_ld   (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
3704                         } else {
3705                                 s390_basr (code, s390_r13, 0);
3706                                 s390_j    (code, 4);
3707                                 s390_word (code, ins->inst_offset);
3708                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3709                                 s390_ld   (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
3710                         }
3711                 }
3712                         break;
3713                 case OP_STORER4_MEMBASE_REG: {
3714                         if (s390_is_uimm12(ins->inst_offset)) {
3715                                 s390_ledbr(code, s390_f15, ins->sreg1);
3716                                 s390_ste  (code, s390_f15, 0, ins->inst_destbasereg, ins->inst_offset);
3717                         } else {
3718                                 s390_basr (code, s390_r13, 0);
3719                                 s390_j    (code, 4);
3720                                 s390_word (code, ins->inst_offset);
3721                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3722                                 s390_ledbr(code, s390_f15, ins->sreg1);
3723                                 s390_ste  (code, s390_f15, s390_r13, ins->inst_destbasereg, 0);
3724                         }
3725                 }
3726                         break;
3727                 case OP_LOADR4_MEMBASE: {
3728                         if (s390_is_uimm12(ins->inst_offset)) {
3729                                 s390_ldeb (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_ldeb (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
3736                         }
3737                 }
3738                         break;
3739                 case CEE_CONV_R_UN: {
3740                         s390_cdfbr (code, ins->dreg, ins->sreg1);
3741                         s390_ltr   (code, ins->sreg1, ins->sreg1);
3742                         s390_jnl   (code, 12);
3743                         s390_basr  (code, s390_r13, 0);
3744                         s390_j     (code, 6);
3745                         s390_word  (code, 0x41f00000);
3746                         s390_word  (code, 0);
3747                         s390_adb   (code, ins->dreg, 0, s390_r13, 4);
3748                 }
3749                         break;
3750                 case CEE_CONV_R4: {
3751                         s390_cdfbr (code, ins->dreg, ins->sreg1);
3752                 }
3753                         break;
3754                 case CEE_CONV_R8: {
3755                         s390_cdfbr (code, ins->dreg, ins->sreg1);
3756                 }
3757                         break;
3758                 case OP_FCONV_TO_I1:
3759                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 1, TRUE);
3760                         break;
3761                 case OP_FCONV_TO_U1:
3762                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 1, FALSE);
3763                         break;
3764                 case OP_FCONV_TO_I2:
3765                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 2, TRUE);
3766                         break;
3767                 case OP_FCONV_TO_U2:
3768                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 2, FALSE);
3769                         break;
3770                 case OP_FCONV_TO_I4:
3771                 case OP_FCONV_TO_I:
3772                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 4, TRUE);
3773                         break;
3774                 case OP_FCONV_TO_U4:
3775                 case OP_FCONV_TO_U:
3776                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 4, FALSE);
3777                         break;
3778                 case OP_FCONV_TO_I8:
3779                 case OP_FCONV_TO_U8:
3780                         g_assert_not_reached ();
3781                         /* Implemented as helper calls */
3782                         break;
3783                 case OP_LCONV_TO_R_UN:
3784                         g_assert_not_reached ();
3785                         /* Implemented as helper calls */
3786                         break;
3787                 case OP_LCONV_TO_OVF_I: {
3788                         /* Valid ints: 0xffffffff:8000000 to 00000000:0x7f000000 */
3789                         short int *o[5];
3790                         s390_ltr  (code, ins->sreg1, ins->sreg1);
3791                         s390_jnl  (code, 0); CODEPTR(code, o[0]);
3792                         s390_ltr  (code, ins->sreg2, ins->sreg2);
3793                         s390_jnl  (code, 0); CODEPTR(code, o[1]);
3794                         s390_lhi  (code, s390_r13, -1);
3795                         s390_cr   (code, ins->sreg2, s390_r13);
3796                         s390_jnz  (code, 0); CODEPTR(code, o[2]);
3797                         if (ins->dreg != ins->sreg1)
3798                                 s390_lr   (code, ins->dreg, ins->sreg1);
3799                         s390_j    (code, 0); CODEPTR(code, o[3]);
3800                         PTRSLOT(code, o[0]);
3801                         s390_ltr  (code, ins->sreg2, ins->sreg2);
3802                         s390_jz   (code, 0); CODEPTR(code, o[4]);
3803                         PTRSLOT(code, o[1]);
3804                         PTRSLOT(code, o[2]);
3805                         mono_add_patch_info (cfg, code - cfg->native_code,
3806                                              MONO_PATCH_INFO_EXC, "OverflowException");
3807                         s390_brasl (code, s390_r14, 0);
3808                         PTRSLOT(code, o[3]);
3809                         PTRSLOT(code, o[4]);
3810                 }
3811                         break;
3812                 case OP_SQRT: {
3813                         s390_sqdbr (code, ins->dreg, ins->sreg1);
3814                 }
3815                         break;
3816                 case OP_FADD: {
3817                         CHECK_SRCDST_COM_F;
3818                         s390_adbr (code, ins->dreg, src2);
3819                 }
3820                         break;
3821                 case OP_FSUB: {
3822                         CHECK_SRCDST_NCOM_F;
3823                         s390_sdbr (code, ins->dreg, src2);
3824                 }
3825                         break;
3826                 case OP_FMUL: {
3827                         CHECK_SRCDST_COM_F;
3828                         s390_mdbr (code, ins->dreg, src2);
3829                 }
3830                         break;
3831                 case OP_FDIV: {
3832                         CHECK_SRCDST_NCOM_F;
3833                         s390_ddbr (code, ins->dreg, src2);
3834                 }
3835                         break;
3836                 case OP_FNEG: {
3837                         s390_lcdbr (code, ins->dreg, ins->sreg1);
3838                 }
3839                         break;
3840                 case OP_FREM: {
3841                         CHECK_SRCDST_NCOM_F;
3842                         s390_didbr (code, ins->dreg, src2, 5, s390_f15);
3843                 }
3844                         break;
3845                 case OP_FCOMPARE: {
3846                         s390_cdbr (code, ins->sreg1, ins->sreg2);
3847                 }
3848                         break;
3849                 case OP_FCEQ: {
3850                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3851                         s390_lhi   (code, ins->dreg, 1);
3852                         s390_je    (code, 4);
3853                         s390_lhi   (code, ins->dreg, 0);
3854                 }
3855                         break;
3856                 case OP_FCLT: {
3857                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3858                         s390_lhi   (code, ins->dreg, 1);
3859                         s390_jl    (code, 4);
3860                         s390_lhi   (code, ins->dreg, 0);
3861                 }
3862                         break;
3863                 case OP_FCLT_UN: {
3864                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3865                         s390_lhi   (code, ins->dreg, 1);
3866                         s390_jlo   (code, 4);
3867                         s390_lhi   (code, ins->dreg, 0);
3868                 }
3869                         break;
3870                 case OP_FCGT: {
3871                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3872                         s390_lhi   (code, ins->dreg, 1);
3873                         s390_jh    (code, 4);
3874                         s390_lhi   (code, ins->dreg, 0);
3875                 }
3876                         break;
3877                 case OP_FCGT_UN: {
3878                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3879                         s390_lhi   (code, ins->dreg, 1);
3880                         s390_jho   (code, 4);
3881                         s390_lhi   (code, ins->dreg, 0);
3882                 }
3883                         break;
3884                 case OP_FBEQ: {
3885                         short *o;
3886                         s390_jo (code, 0); CODEPTR(code, o);
3887                         EMIT_COND_BRANCH (ins, S390_CC_EQ);
3888                         PTRSLOT(code, o);
3889                 }
3890                         break;
3891                 case OP_FBNE_UN:
3892                         EMIT_COND_BRANCH (ins, S390_CC_NE|S390_CC_OV);
3893                         break;
3894                 case OP_FBLT: {
3895                         short *o;
3896                         s390_jo (code, 0); CODEPTR(code, o);
3897                         EMIT_COND_BRANCH (ins, S390_CC_LT);
3898                         PTRSLOT(code, o);
3899                 }
3900                         break;
3901                 case OP_FBLT_UN:
3902                         EMIT_COND_BRANCH (ins, S390_CC_LT|S390_CC_OV);
3903                         break;
3904                 case OP_FBGT: {
3905                         short *o;
3906                         s390_jo (code, 0); CODEPTR(code, o);
3907                         EMIT_COND_BRANCH (ins, S390_CC_GT);
3908                         PTRSLOT(code, o);
3909                 }
3910                         break;
3911                 case OP_FBGT_UN:
3912                         EMIT_COND_BRANCH (ins, S390_CC_GT|S390_CC_OV);
3913                         break;
3914                 case OP_FBGE: {
3915                         short *o;
3916                         s390_jo (code, 0); CODEPTR(code, o);
3917                         EMIT_COND_BRANCH (ins, S390_CC_GE);
3918                         PTRSLOT(code, o);
3919                 }
3920                         break;
3921                 case OP_FBGE_UN:
3922                         EMIT_COND_BRANCH (ins, S390_CC_GE|S390_CC_OV);
3923                         break;
3924                 case OP_FBLE: {
3925                         short *o;
3926                         s390_jo (code, 0); CODEPTR(code, o);
3927                         EMIT_COND_BRANCH (ins, S390_CC_LE);
3928                         PTRSLOT(code, o);
3929                 }
3930                         break;
3931                 case OP_FBLE_UN:
3932                         EMIT_COND_BRANCH (ins, S390_CC_LE|S390_CC_OV);
3933                         break;
3934                 case OP_CKFINITE: {
3935                         short *o;
3936                         s390_lhi  (code, s390_r13, 0x7f);
3937                         s390_tcdb (code, ins->sreg1, 0, s390_r13, 0);
3938                         s390_jz   (code, 0); CODEPTR(code, o);
3939                         mono_add_patch_info (cfg, code - cfg->native_code,
3940                                              MONO_PATCH_INFO_EXC, "ArithmeticException");
3941                         s390_brasl (code, s390_r14,0);
3942                         PTRSLOT(code, o);
3943                 }
3944                         break;
3945                 case OP_S390_MOVE: {
3946                         if (ins->backend.size > 0) {
3947                                 if (ins->backend.size <= 256) {
3948                                         s390_mvc  (code, ins->backend.size, ins->dreg,
3949                                                    ins->inst_offset, ins->sreg1, ins->inst_imm);
3950                                 } else {
3951                                         s390_lr   (code, s390_r0, ins->dreg);
3952                                         if (s390_is_imm16 (ins->inst_offset)) {
3953                                                 s390_ahi  (code, s390_r0, ins->inst_offset);
3954                                         } else {
3955                                                 s390_basr (code, s390_r13, 0);
3956                                                 s390_j    (code, 4);
3957                                                 s390_word (code, ins->inst_offset);
3958                                                 s390_a    (code, s390_r0, 0, s390_r13, 4);
3959                                         }
3960                                         s390_lr   (code, s390_r14, s390_r12);
3961                                         s390_lr   (code, s390_r12, ins->sreg1);
3962                                         if (s390_is_imm16 (ins->inst_imm)) {
3963                                                 s390_ahi  (code, s390_r12, ins->inst_imm);
3964                                         } else {
3965                                                 s390_basr (code, s390_r13, 0);
3966                                                 s390_j    (code, 4);
3967                                                 s390_word (code, ins->inst_imm);
3968                                                 s390_a    (code, s390_r12, 0, s390_r13, 4);
3969                                         }
3970                                         s390_lr   (code, s390_r1, ins->sreg1);
3971                                         s390_lr   (code, s390_r13, s390_r1);
3972                                         s390_mvcle(code, s390_r0, s390_r12, 0, 0);
3973                                         s390_jo   (code, -2);
3974                                         s390_lr   (code, s390_r12, s390_r14);
3975                                 }
3976                         }
3977                 }
3978                         break;
3979                 case OP_ATOMIC_ADD_I4: {
3980                         s390_lr  (code, s390_r1, ins->sreg2);
3981                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
3982                         s390_a   (code, s390_r1, 0, ins->inst_basereg, ins->inst_offset);
3983                         s390_cs  (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
3984                         s390_jnz (code, -7);
3985                         s390_lr  (code, ins->dreg, s390_r1);
3986                 }
3987                         break;
3988                 case OP_ATOMIC_ADD_NEW_I4: {
3989                         s390_lr  (code, s390_r1, ins->sreg2);
3990                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
3991                         s390_a   (code, s390_r1, 0, ins->inst_basereg, ins->inst_offset);
3992                         s390_cs  (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
3993                         s390_jnz (code, -7);
3994                         s390_lr  (code, ins->dreg, s390_r1);
3995                 }
3996                         break;
3997                 case OP_ATOMIC_EXCHANGE_I4: {
3998                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
3999                         s390_cs  (code, s390_r0, ins->sreg2, ins->inst_basereg, ins->inst_offset);
4000                         s390_jnz (code, -4);
4001                         s390_lr  (code, ins->dreg, s390_r0);
4002                 }
4003                         break;
4004                 case OP_S390_BKCHAIN: {
4005                         s390_lr  (code, ins->dreg, ins->sreg1);
4006                         if (s390_is_imm16 (cfg->stack_offset)) {
4007                                 s390_ahi (code, ins->dreg, cfg->stack_offset);
4008                         } else {
4009                                 s390_basr (code, s390_r13, 0);
4010                                 s390_j    (code, 6);
4011                                 s390_word (code, cfg->stack_offset);
4012                                 s390_a    (code, ins->dreg, 0, s390_r13, 4);
4013                         }
4014                 }
4015                 case OP_MEMORY_BARRIER: {
4016                 }
4017                         break;
4018                 default:
4019                         g_warning ("unknown opcode %s in %s()\n", mono_inst_name (ins->opcode), __FUNCTION__);
4020                         g_assert_not_reached ();
4021                 }
4022
4023                 if ((cfg->opt & MONO_OPT_BRANCH) && ((code - cfg->native_code - offset) > max_len)) {
4024                         g_warning ("wrong maximal instruction length of instruction %s (expected %d, got %d)",
4025                                    mono_inst_name (ins->opcode), max_len, code - cfg->native_code - offset);
4026                         g_assert_not_reached ();
4027                 }
4028
4029                 cpos += max_len;
4030
4031                 last_offset = offset;
4032         }
4033
4034         cfg->code_len = code - cfg->native_code;
4035 }
4036
4037 /*========================= End of Function ========================*/
4038
4039 /*------------------------------------------------------------------*/
4040 /*                                                                  */
4041 /* Name         - mono_arch_register_lowlevel_calls                 */
4042 /*                                                                  */
4043 /* Function     - Register routines to help with --trace operation. */
4044 /*                                                                  */
4045 /*------------------------------------------------------------------*/
4046
4047 void
4048 mono_arch_register_lowlevel_calls (void)
4049 {
4050         mono_register_jit_icall (mono_arch_break, "mono_arch_break", NULL, TRUE);
4051         mono_register_jit_icall (mono_arch_get_lmf_addr, "mono_arch_get_lmf_addr", NULL, TRUE);
4052 }
4053
4054 /*========================= End of Function ========================*/
4055
4056 /*------------------------------------------------------------------*/
4057 /*                                                                  */
4058 /* Name         - mono_arch_patch_code                              */
4059 /*                                                                  */
4060 /* Function     - Process the patch data created during the         */
4061 /*                instruction build process. This resolves jumps,   */
4062 /*                calls, variables etc.                             */
4063 /*                                                                  */
4064 /*------------------------------------------------------------------*/
4065
4066 static void
4067 mono_arch_break(void) {
4068 }
4069
4070 /*========================= End of Function ========================*/
4071
4072 /*------------------------------------------------------------------*/
4073 /*                                                                  */
4074 /* Name         - mono_arch_patch_code                              */
4075 /*                                                                  */
4076 /* Function     - Process the patch data created during the         */
4077 /*                instruction build process. This resolves jumps,   */
4078 /*                calls, variables etc.                             */
4079 /*                                                                  */
4080 /*------------------------------------------------------------------*/
4081
4082 void
4083 mono_arch_patch_code (MonoMethod *method, MonoDomain *domain,
4084                       guint8 *code, MonoJumpInfo *ji, gboolean run_cctors)
4085 {
4086         MonoJumpInfo *patch_info;
4087
4088         for (patch_info = ji; patch_info; patch_info = patch_info->next) {
4089                 unsigned char *ip = patch_info->ip.i + code;
4090                 gconstpointer target = NULL;
4091
4092                 target = mono_resolve_patch_target (method, domain, code,
4093                                                     patch_info, run_cctors);
4094
4095                 switch (patch_info->type) {
4096                         case MONO_PATCH_INFO_IP:
4097                         case MONO_PATCH_INFO_EXC_NAME:
4098                         case MONO_PATCH_INFO_LDSTR:
4099                         case MONO_PATCH_INFO_TYPE_FROM_HANDLE:
4100                         case MONO_PATCH_INFO_LDTOKEN:
4101                         case MONO_PATCH_INFO_EXC:
4102                                 continue;
4103                         case MONO_PATCH_INFO_SWITCH:
4104                                 /*----------------------------------*/
4105                                 /* ip points at the basr r13,0/j +4 */
4106                                 /* instruction the vtable value     */
4107                                 /* follows this (i.e. ip+6)         */
4108                                 /*----------------------------------*/
4109                                 *((gconstpointer *)(ip+6)) = target;
4110                                 target = NULL;
4111                                 continue;
4112                         case MONO_PATCH_INFO_METHODCONST:
4113                         case MONO_PATCH_INFO_CLASS:
4114                         case MONO_PATCH_INFO_IMAGE:
4115                         case MONO_PATCH_INFO_FIELD:
4116                         case MONO_PATCH_INFO_IID:
4117                                 target = S390_RELATIVE(target, ip);
4118                                 continue;
4119                         case MONO_PATCH_INFO_R4:
4120                         case MONO_PATCH_INFO_R8:
4121                         case MONO_PATCH_INFO_METHOD_REL:
4122                                 g_assert_not_reached ();
4123                                 continue;
4124                         default:
4125                                 target = S390_RELATIVE(target, ip);
4126                                 ip += 2;
4127                 }
4128                 s390_patch (ip, (guint32) target);
4129         }
4130 }
4131
4132 /*========================= End of Function ========================*/
4133
4134 /*------------------------------------------------------------------*/
4135 /*                                                                  */
4136 /* Name         - emit_load_volatile_registers                      */
4137 /*                                                                  */
4138 /* Function     - Create the instruction sequence for loading the   */
4139 /*                parameter registers for use with the 'tail' op.   */
4140 /*                                                                  */
4141 /*                The register loading operations performed here    */
4142 /*                are the mirror of the store operations performed  */
4143 /*                in mono_arch_emit_prolog and need to be kept in   */
4144 /*                synchronization with it.                          */
4145 /*                                                                  */
4146 /*------------------------------------------------------------------*/
4147
4148 guint8 *
4149 emit_load_volatile_registers(guint8 * code, MonoCompile *cfg)
4150 {
4151         MonoMethod *method = cfg->method;
4152         MonoMethodSignature *sig;
4153         MonoInst *inst;
4154         int pos, i;
4155         CallInfo *cinfo;
4156         size_data sz;
4157
4158         sig = mono_method_signature (method);
4159         pos = 0;
4160
4161         cinfo = calculate_sizes (sig, &sz, sig->pinvoke);
4162
4163         if (cinfo->struct_ret) {
4164                 ArgInfo *ainfo = &cinfo->ret;
4165                 inst         = cfg->ret;
4166                 s390_l (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4167         }
4168
4169         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
4170                 ArgInfo *ainfo = cinfo->args + i;
4171                 inst = cfg->args [pos];
4172
4173                 if (inst->opcode == OP_REGVAR) {
4174                         if (ainfo->regtype == RegTypeGeneral)
4175                                 s390_lr (code, ainfo->reg, inst->dreg);
4176                         else if (ainfo->regtype == RegTypeFP) {
4177                                 if (inst->dreg != ainfo->reg) {
4178                                         if (ainfo->size == 4) {
4179                                                 s390_ldebr (code, ainfo->reg, inst->dreg);
4180                                         } else {
4181                                                 s390_ldr   (code, ainfo->reg, inst->dreg);
4182                                         }
4183                                 }
4184                         }
4185                         else if (ainfo->regtype == RegTypeBase) {
4186                         } else
4187                                 g_assert_not_reached ();
4188                 } else {
4189                         if (ainfo->regtype == RegTypeGeneral) {
4190                                 if (!((ainfo->reg >= 2) && (ainfo->reg <= 6)))
4191                                         g_assert_not_reached();
4192                                 switch (ainfo->size) {
4193                                 case 1:
4194                                         s390_ic (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4195                                         break;
4196                                 case 2:
4197                                         s390_lh (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4198                                         break;
4199                                 case 8:
4200                                         s390_lm (code, ainfo->reg, ainfo->reg + 1,
4201                                                   inst->inst_basereg, inst->inst_offset);
4202                                         break;
4203                                 default:
4204                                         s390_l  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4205                                 }
4206                         } else if (ainfo->regtype == RegTypeBase) {
4207                         } else if (ainfo->regtype == RegTypeFP) {
4208                                 if (ainfo->size == 8)
4209                                         s390_ld (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4210                                 else if (ainfo->size == 4)
4211                                         s390_le (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4212                                 else
4213                                         g_assert_not_reached ();
4214                         } else if (ainfo->regtype == RegTypeStructByVal) {
4215                                 if (ainfo->reg != STK_BASE) {
4216                                         switch (ainfo->size) {
4217                                         case 1:
4218                                                 s390_ic (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4219                                                 break;
4220                                         case 2:
4221                                                 s390_lh (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4222                                                 break;
4223                                         case 4:
4224                                                 s390_l  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4225                                                 break;
4226                                         case 8:
4227                                                 s390_lm (code, ainfo->reg, ainfo->reg+1, inst->inst_basereg, inst->inst_offset);
4228                                                 break;
4229                                         }
4230                                 }
4231                         } else if (ainfo->regtype == RegTypeStructByAddr) {
4232                                 if (ainfo->reg != STK_BASE) {
4233                                         s390_l  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4234                                 }
4235                         } else
4236                                 g_assert_not_reached ();
4237                 }
4238                 pos++;
4239         }
4240
4241         g_free (cinfo);
4242
4243         return code;
4244 }
4245
4246 /*========================= End of Function ========================*/
4247
4248 /*------------------------------------------------------------------*/
4249 /*                                                                  */
4250 /* Name         - mono_arch_emit_prolog                             */
4251 /*                                                                  */
4252 /* Function     - Create the instruction sequence for a function    */
4253 /*                prolog.                                           */
4254 /*                                                                  */
4255 /*------------------------------------------------------------------*/
4256
4257 guint8 *
4258 mono_arch_emit_prolog (MonoCompile *cfg)
4259 {
4260         MonoMethod *method = cfg->method;
4261         MonoBasicBlock *bb;
4262         MonoMethodSignature *sig;
4263         MonoInst *inst;
4264         int alloc_size, pos, max_offset, i;
4265         guint8 *code;
4266         CallInfo *cinfo;
4267         size_data sz;
4268         int tracing = 0;
4269         int lmfOffset;                                                          \
4270
4271         if (mono_jit_trace_calls != NULL && mono_trace_eval (method))
4272                 tracing = 1;
4273
4274         cfg->code_size   = 512;
4275         cfg->native_code = code = g_malloc (cfg->code_size);
4276
4277         s390_stm  (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
4278
4279         if (cfg->flags & MONO_CFG_HAS_ALLOCA) {
4280                 cfg->used_int_regs |= 1 << 11;
4281         }
4282
4283         alloc_size = cfg->stack_offset;
4284
4285         cfg->stack_usage = alloc_size;
4286         s390_lr   (code, s390_r11, STK_BASE);
4287         if (s390_is_uimm16 (alloc_size)) {
4288                 s390_ahi  (code, STK_BASE, -alloc_size);
4289         } else {
4290                 int stackSize = alloc_size;
4291                 while (stackSize > 32767) {
4292                         s390_ahi  (code, STK_BASE, -32767);
4293                         stackSize -= 32767;
4294                 }
4295                 s390_ahi  (code, STK_BASE, -stackSize);
4296         }
4297         s390_st   (code, s390_r11, 0, STK_BASE, 0);
4298
4299         if (cfg->frame_reg != STK_BASE)
4300                 s390_lr (code, s390_r11, STK_BASE);
4301
4302         /* compute max_offset in order to use short forward jumps
4303          * we always do it on s390 because the immediate displacement
4304          * for jumps is too small
4305          */
4306         max_offset = 0;
4307         for (bb = cfg->bb_entry; bb; bb = bb->next_bb) {
4308                 MonoInst *ins;
4309                 bb->max_offset = max_offset;
4310
4311                 if (cfg->prof_options & MONO_PROFILE_COVERAGE)
4312                         max_offset += 6;
4313
4314                 MONO_BB_FOR_EACH_INS (bb, ins) {
4315                         max_offset += ((guint8 *)ins_get_spec (ins->opcode))[MONO_INST_LEN];
4316         }
4317
4318         /* load arguments allocated to register from the stack */
4319         sig = mono_method_signature (method);
4320         pos = 0;
4321
4322         cinfo = calculate_sizes (sig, &sz, sig->pinvoke);
4323
4324         if (cinfo->struct_ret) {
4325                 ArgInfo *ainfo = &cinfo->ret;
4326                 inst         = cfg->ret;
4327                 inst->backend.size = ainfo->vtsize;
4328                 s390_st (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4329         }
4330
4331         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
4332                 ArgInfo *ainfo = cinfo->args + i;
4333                 inst = cfg->args [pos];
4334
4335                 if (inst->opcode == OP_REGVAR) {
4336                         if (ainfo->regtype == RegTypeGeneral)
4337                                 s390_lr (code, inst->dreg, ainfo->reg);
4338                         else if (ainfo->regtype == RegTypeFP) {
4339                                 if (inst->dreg != ainfo->reg) {
4340                                         if (ainfo->size == 4) {
4341                                                 s390_ledbr (code, inst->dreg, ainfo->reg);
4342                                         } else {
4343                                                 s390_ldr   (code, inst->dreg, ainfo->reg);
4344                                         }
4345                                 }
4346                         }
4347                         else if (ainfo->regtype == RegTypeBase) {
4348                                 s390_lr  (code, s390_r13, STK_BASE);
4349                                 s390_ahi (code, s390_r13, alloc_size);
4350                                 s390_l   (code, inst->dreg, 0, s390_r13, ainfo->offset);
4351                         } else
4352                                 g_assert_not_reached ();
4353
4354                         if (cfg->verbose_level > 2)
4355                                 g_print ("Argument %d assigned to register %s\n",
4356                                          pos, mono_arch_regname (inst->dreg));
4357                 } else {
4358                         if (ainfo->regtype == RegTypeGeneral) {
4359                                 if (!((ainfo->reg >= 2) && (ainfo->reg <= 6)))
4360                                         g_assert_not_reached();
4361                                 switch (ainfo->size) {
4362                                 case 1:
4363                                         s390_stc (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4364                                         break;
4365                                 case 2:
4366                                         s390_sth (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4367                                         break;
4368                                 case 8:
4369                                         s390_stm (code, ainfo->reg, ainfo->reg + 1,
4370                                                   inst->inst_basereg, inst->inst_offset);
4371                                         break;
4372                                 default:
4373                                         s390_st  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4374                                 }
4375                         } else if (ainfo->regtype == RegTypeBase) {
4376                         } else if (ainfo->regtype == RegTypeFP) {
4377                                 if (ainfo->size == 8)
4378                                         s390_std (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4379                                 else if (ainfo->size == 4)
4380                                         s390_ste (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4381                                 else
4382                                         g_assert_not_reached ();
4383                         } else if (ainfo->regtype == RegTypeStructByVal) {
4384                                 int doffset = inst->inst_offset;
4385                                 int reg;
4386                                 if (ainfo->reg != STK_BASE)
4387                                         reg = ainfo->reg;
4388                                 else {
4389                                         reg = s390_r0;
4390                                         s390_lr  (code, s390_r13, STK_BASE);
4391                                         s390_ahi (code, s390_r13, alloc_size);
4392                                 }
4393                                 switch (ainfo->size) {
4394                                         case 1:
4395                                                 if (ainfo->reg == STK_BASE)
4396                                                         s390_ic  (code, reg, 0, s390_r13, ainfo->offset+3);
4397                                                 s390_stc (code, reg, 0, inst->inst_basereg, doffset);
4398                                                 break;
4399                                         case 2:
4400                                                 if (ainfo->reg == STK_BASE)
4401                                                         s390_lh  (code, reg, 0, s390_r13, ainfo->offset+2);
4402                                                 s390_sth (code, reg, 0, inst->inst_basereg, doffset);
4403                                                 break;
4404                                         case 4:
4405                                                 if (ainfo->reg == STK_BASE)
4406                                                         s390_l   (code, reg, 0, s390_r13, ainfo->offset);
4407                                                 s390_st  (code, reg, 0, inst->inst_basereg, doffset);
4408                                                 break;
4409                                         case 8:
4410                                                 if (ainfo->reg == STK_BASE)
4411                                                         s390_lm  (code, s390_r0, s390_r1, s390_r13, ainfo->offset);
4412                                                 s390_stm (code, reg, reg+1, inst->inst_basereg, doffset);
4413                                                 break;
4414                                 }
4415                         } else if (ainfo->regtype == RegTypeStructByAddr) {
4416                                 if (ainfo->reg != STK_BASE)
4417                                         s390_st  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4418                         } else
4419                                 g_assert_not_reached ();
4420                 }
4421                 pos++;
4422         }
4423
4424         if (method->save_lmf) {
4425                 /*---------------------------------------------------------------*/
4426                 /* we build the MonoLMF structure on the stack - see mini-s390.h */
4427                 /*---------------------------------------------------------------*/
4428                 lmfOffset = alloc_size - sizeof(MonoLMF);
4429
4430                 s390_lr    (code, s390_r13, cfg->frame_reg);
4431                 if (s390_is_uimm16(lmfOffset))
4432                         s390_ahi   (code, s390_r13, lmfOffset);
4433                 else {
4434                         s390_basr (code, s390_r14, 0);
4435                         s390_j    (code, 4);
4436                         s390_word (code, lmfOffset);
4437                         s390_a    (code, s390_r13, 0, s390_r14, 4);
4438                 }
4439
4440                 /*---------------------------------------------------------------*/
4441                 /* Preserve the parameter registers while we fix up the lmf      */
4442                 /*---------------------------------------------------------------*/
4443                 s390_stm   (code, s390_r2, s390_r6, s390_r13,
4444                             G_STRUCT_OFFSET(MonoLMF, pregs[0]));
4445
4446                 /*---------------------------------------------------------------*/
4447                 /* On return from this call r2 have the address of the &lmf      */
4448                 /*---------------------------------------------------------------*/
4449                 mono_add_patch_info (cfg, code - cfg->native_code,
4450                                      MONO_PATCH_INFO_INTERNAL_METHOD,
4451                                      (gpointer)"mono_get_lmf_addr");
4452                 s390_brasl (code, s390_r14, 0);
4453
4454                 /*---------------------------------------------------------------*/
4455                 /* Set lmf.lmf_addr = jit_tls->lmf                               */
4456                 /*---------------------------------------------------------------*/
4457                 s390_st    (code, s390_r2, 0, s390_r13,
4458                             G_STRUCT_OFFSET(MonoLMF, lmf_addr));
4459
4460                 /*---------------------------------------------------------------*/
4461                 /* Get current lmf                                               */
4462                 /*---------------------------------------------------------------*/
4463                 s390_l     (code, s390_r0, 0, s390_r2, 0);
4464
4465                 /*---------------------------------------------------------------*/
4466                 /* Set our lmf as the current lmf                                */
4467                 /*---------------------------------------------------------------*/
4468                 s390_st    (code, s390_r13, 0, s390_r2, 0);
4469
4470                 /*---------------------------------------------------------------*/
4471                 /* Have our lmf.previous_lmf point to the last lmf               */
4472                 /*---------------------------------------------------------------*/
4473                 s390_st    (code, s390_r0, 0, s390_r13,
4474                             G_STRUCT_OFFSET(MonoLMF, previous_lmf));
4475
4476                 /*---------------------------------------------------------------*/
4477                 /* save method info                                              */
4478                 /*---------------------------------------------------------------*/
4479                 s390_basr  (code, s390_r1, 0);
4480                 s390_j     (code, 4);
4481                 s390_word  (code, method);
4482                 s390_l     (code, s390_r1, 0, s390_r1, 4);
4483                 s390_st    (code, s390_r1, 0, s390_r13,
4484                             G_STRUCT_OFFSET(MonoLMF, method));
4485
4486                 /*---------------------------------------------------------------*/
4487                 /* save the current IP                                           */
4488                 /*---------------------------------------------------------------*/
4489                 s390_st    (code, STK_BASE, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, ebp));
4490                 s390_basr  (code, s390_r1, 0);
4491                 s390_la    (code, s390_r1, 0, s390_r1, 0);
4492                 s390_st    (code, s390_r1, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, eip));
4493
4494                 /*---------------------------------------------------------------*/
4495                 /* Save general and floating point registers                     */
4496                 /*---------------------------------------------------------------*/
4497                 s390_stm   (code, s390_r2, s390_r12, s390_r13,
4498                             G_STRUCT_OFFSET(MonoLMF, gregs[2]));
4499                 for (i = 0; i < 16; i++) {
4500                         s390_std  (code, i, 0, s390_r13,
4501                                    G_STRUCT_OFFSET(MonoLMF, fregs[i]));
4502                 }
4503
4504                 /*---------------------------------------------------------------*/
4505                 /* Restore the parameter registers now that we've set up the lmf */
4506                 /*---------------------------------------------------------------*/
4507                 s390_lm    (code, s390_r2, s390_r6, s390_r13,
4508                             G_STRUCT_OFFSET(MonoLMF, pregs[0]));
4509         }
4510
4511         if (tracing)
4512                 code = mono_arch_instrument_prolog(cfg, enter_method, code, TRUE);
4513
4514         cfg->code_len = code - cfg->native_code;
4515         g_free (cinfo);
4516
4517         return code;
4518 }
4519
4520 /*========================= End of Function ========================*/
4521
4522 /*------------------------------------------------------------------*/
4523 /*                                                                  */
4524 /* Name         - mono_arch_emit_epilog                             */
4525 /*                                                                  */
4526 /* Function     - Emit the instructions for a function epilog.      */
4527 /*                                                                  */
4528 /*------------------------------------------------------------------*/
4529
4530 void
4531 mono_arch_emit_epilog (MonoCompile *cfg)
4532 {
4533         MonoMethod *method = cfg->method;
4534         int tracing = 0;
4535         guint8 *code;
4536         int max_epilog_size = 96;
4537
4538         if (cfg->method->save_lmf)
4539                 max_epilog_size += 128;
4540
4541         if (mono_jit_trace_calls != NULL)
4542                 max_epilog_size += 128;
4543
4544         if (cfg->prof_options & MONO_PROFILE_ENTER_LEAVE)
4545                 max_epilog_size += 128;
4546
4547         while ((cfg->code_len + max_epilog_size) > (cfg->code_size - 16)) {
4548                 cfg->code_size  *= 2;
4549                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
4550                 mono_jit_stats.code_reallocs++;
4551         }
4552
4553         code = cfg->native_code + cfg->code_len;
4554
4555         if (mono_jit_trace_calls != NULL && mono_trace_eval (method)) {
4556                 code = mono_arch_instrument_epilog (cfg, leave_method, code, TRUE);
4557                 tracing = 1;
4558         }
4559
4560         if (method->save_lmf)
4561                 restoreLMF(code, cfg->frame_reg, cfg->stack_usage);
4562
4563         if (cfg->flags & MONO_CFG_HAS_ALLOCA)
4564                 s390_l (code, STK_BASE, 0, STK_BASE, 0);
4565         else
4566                 code = backUpStackPtr(cfg, code, STK_BASE);
4567
4568         s390_lm  (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
4569         s390_br  (code, s390_r14);
4570
4571         cfg->code_len = code - cfg->native_code;
4572
4573         g_assert (cfg->code_len < cfg->code_size);
4574
4575 }
4576
4577 /*========================= End of Function ========================*/
4578
4579 /*------------------------------------------------------------------*/
4580 /*                                                                  */
4581 /* Name         - mono_arch_emit_exceptions                         */
4582 /*                                                                  */
4583 /* Function     - Emit the blocks to handle exception conditions.   */
4584 /*                                                                  */
4585 /*------------------------------------------------------------------*/
4586
4587 void
4588 mono_arch_emit_exceptions (MonoCompile *cfg)
4589 {
4590         MonoJumpInfo    *patch_info;
4591         guint8          *code;
4592         int             nThrows = 0,
4593                         exc_count = 0,
4594                         iExc;
4595         guint32         code_size;
4596         MonoClass       *exc_classes [MAX_EXC];
4597         guint8          *exc_throw_start [MAX_EXC];
4598
4599         for (patch_info = cfg->patch_info;
4600              patch_info;
4601              patch_info = patch_info->next) {
4602                 if (patch_info->type == MONO_PATCH_INFO_EXC)
4603                         exc_count++;
4604         }
4605
4606         code_size = exc_count * 26;
4607
4608         while ((cfg->code_len + code_size) > (cfg->code_size - 16)) {
4609                 cfg->code_size  *= 2;
4610                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
4611                 mono_jit_stats.code_reallocs++;
4612         }
4613
4614         code = cfg->native_code + cfg->code_len;
4615
4616         /*---------------------------------------------------------------------*/
4617         /* Add code to raise exceptions                                        */
4618         /*---------------------------------------------------------------------*/
4619         for (patch_info = cfg->patch_info; patch_info; patch_info = patch_info->next) {
4620                 switch (patch_info->type) {
4621                 case MONO_PATCH_INFO_EXC: {
4622                         guint8 *ip = patch_info->ip.i + cfg->native_code;
4623                         MonoClass *exc_class;
4624                         guint32 throw_ip;
4625
4626                         /*-----------------------------------------------------*/
4627                         /* Patch the branch in epilog to come here             */
4628                         /*-----------------------------------------------------*/
4629                         s390_patch (ip + 2, (guint32) (S390_RELATIVE(code,ip)));
4630
4631                         exc_class = mono_class_from_name (mono_defaults.corlib,
4632                                                           "System",
4633                                                           patch_info->data.name);
4634                         g_assert (exc_class);
4635                         throw_ip = patch_info->ip.i;
4636
4637                         for (iExc = 0; iExc < nThrows; ++iExc)
4638                                 if (exc_classes [iExc] == exc_class)
4639                                         break;
4640
4641                         if (iExc < nThrows) {
4642                                 s390_jcl (code, S390_CC_UN, (guint32) exc_throw_start [iExc]);
4643                                 patch_info->type = MONO_PATCH_INFO_NONE;
4644                         } else {
4645
4646                                 if (nThrows < MAX_EXC) {
4647                                         exc_classes [nThrows]     = exc_class;
4648                                         exc_throw_start [nThrows] = code;
4649                                 }
4650
4651                                 /*---------------------------------------------*/
4652                                 /* Patch the parameter passed to the handler   */
4653                                 /*---------------------------------------------*/
4654                                 s390_basr (code, s390_r13, 0);
4655                                 s390_j    (code, 4);
4656                                 s390_word (code, patch_info->data.target);
4657                                 /*---------------------------------------------*/
4658                                 /* Load return address & parameter register    */
4659                                 /*---------------------------------------------*/
4660                                 s390_larl (code, s390_r14, S390_RELATIVE((patch_info->ip.i +
4661                                                            cfg->native_code + 8), code));
4662                                 s390_l    (code, s390_r2, 0, s390_r13, 4);
4663                                 /*---------------------------------------------*/
4664                                 /* Reuse the current patch to set the jump     */
4665                                 /*---------------------------------------------*/
4666                                 patch_info->type      = MONO_PATCH_INFO_INTERNAL_METHOD;
4667                                 patch_info->data.name = "mono_arch_throw_exception_by_name";
4668                                 patch_info->ip.i      = code - cfg->native_code;
4669                                 s390_jcl  (code, S390_CC_UN, 0);
4670                         }
4671                         break;
4672                 }
4673                 default:
4674                         /* do nothing */
4675                         break;
4676                 }
4677         }
4678
4679         cfg->code_len = code - cfg->native_code;
4680
4681         g_assert (cfg->code_len < cfg->code_size);
4682
4683 }
4684
4685 /*========================= End of Function ========================*/
4686
4687 /*------------------------------------------------------------------*/
4688 /*                                                                  */
4689 /* Name         - mono_arch_setup_jit_tls_data                      */
4690 /*                                                                  */
4691 /* Function     - Setup the JIT's Thread Level Specific Data.       */
4692 /*                                                                  */
4693 /*------------------------------------------------------------------*/
4694
4695 void
4696 mono_arch_setup_jit_tls_data (MonoJitTlsData *tls)
4697 {
4698
4699         if (!tls_offset_inited) {
4700                 tls_offset_inited = TRUE;
4701
4702 #if HAVE_KW_THREAD
4703 # if 0
4704         __asm__ ("\tear\t%r1,0\n"
4705                  "\tlr\t%0,%3\n"
4706                  "\tsr\t%0,%r1\n"
4707                  "\tlr\t%1,%4\n"
4708                  "\tsr\t%1,%r1\n"
4709                  "\tlr\t%2,%5\n"
4710                  "\tsr\t%2,%r1\n"
4711                  : "=r" (appdomain_tls_offset),
4712                    "=r" (thread_tls_offset),
4713                    "=r" (lmf_tls_offset)
4714                  : "r" (&tls_appdomain),
4715                    "r" (&tls_current_object),
4716                    "r" (&mono_lmf_addr)
4717                  : "1", "cc");
4718 # endif
4719 #endif
4720         }
4721
4722         if (!lmf_addr_key_inited) {
4723                 lmf_addr_key_inited = TRUE;
4724                 pthread_key_create (&lmf_addr_key, NULL);
4725         }
4726         pthread_setspecific (lmf_addr_key, &tls->lmf);
4727
4728 }
4729
4730 /*========================= End of Function ========================*/
4731
4732 /*------------------------------------------------------------------*/
4733 /*                                                                  */
4734 /* Name         - mono_arch_free_jit_tls_data                       */
4735 /*                                                                  */
4736 /* Function     - Free tls data.                                    */
4737 /*                                                                  */
4738 /*------------------------------------------------------------------*/
4739
4740 void
4741 mono_arch_free_jit_tls_data (MonoJitTlsData *tls)
4742 {
4743
4744 }
4745
4746 /*========================= End of Function ========================*/
4747
4748 /*------------------------------------------------------------------*/
4749 /*                                                                  */
4750 /* Name         - mono_arch_emit_this_vret_args                     */
4751 /*                                                                  */
4752 /* Function     -                                                   */
4753 /*                                                                  */
4754 /*------------------------------------------------------------------*/
4755
4756 void
4757 mono_arch_emit_this_vret_args (MonoCompile *cfg, MonoCallInst *inst, int this_reg, int this_type, int vt_reg)
4758 {
4759         int this_dreg = s390_r2;
4760
4761         if (vt_reg != -1)
4762                 this_dreg = s390_r3;
4763
4764         /* add the this argument */
4765         if (this_reg != -1) {
4766                 MonoInst *this;
4767                 MONO_INST_NEW (cfg, this, OP_SETREG);
4768                 this->type  = this_type;
4769                 this->sreg1 = this_reg;
4770                 this->dreg  = mono_regstate_next_int (cfg->rs);
4771                 mono_bblock_add_inst (cfg->cbb, this);
4772                 mono_call_inst_add_outarg_reg (cfg, inst, this->dreg, this_dreg, FALSE);
4773         }
4774
4775         if (vt_reg != -1) {
4776                 MonoInst *vtarg;
4777                 MONO_INST_NEW (cfg, vtarg, OP_SETREG);
4778                 vtarg->type  = STACK_MP;
4779                 vtarg->sreg1 = vt_reg;
4780                 vtarg->dreg  = mono_regstate_next_int (cfg->rs);
4781                 mono_bblock_add_inst (cfg->cbb, vtarg);
4782                 mono_call_inst_add_outarg_reg (cfg, inst, vtarg->dreg, s390_r2, FALSE);
4783         }
4784 }
4785
4786 /*========================= End of Function ========================*/
4787
4788 /*------------------------------------------------------------------*/
4789 /*                                                                  */
4790 /* Name         - mono_arch_get_inst_for_method                   */
4791 /*                                                                  */
4792 /* Function     - Check for opcodes we can handle directly in       */
4793 /*                hardware.                                         */
4794 /*                                                                  */
4795 /*------------------------------------------------------------------*/
4796
4797 MonoInst*
4798 mono_arch_get_inst_for_method (MonoCompile *cfg, MonoMethod *cmethod,
4799                                MonoMethodSignature *fsig, MonoInst **args)
4800 {
4801         MonoInst *ins = NULL;
4802
4803         if (cmethod->klass == mono_defaults.math_class) {
4804                 if (strcmp (cmethod->name, "Sqrt") == 0) {
4805                         MONO_INST_NEW (cfg, ins, OP_SQRT);
4806                         ins->inst_i0 = args [0];
4807                 }
4808         } else if (cmethod->klass == mono_defaults.thread_class &&
4809                            strcmp (cmethod->name, "MemoryBarrier") == 0) {
4810                 MONO_INST_NEW (cfg, ins, OP_MEMORY_BARRIER);
4811         } else if(cmethod->klass->image == mono_defaults.corlib &&
4812                            (strcmp (cmethod->klass->name_space, "System.Threading") == 0) &&
4813                            (strcmp (cmethod->klass->name, "Interlocked") == 0)) {
4814
4815                 if (strcmp (cmethod->name, "Increment") == 0 &&
4816                     fsig->params [0]->type == MONO_TYPE_I4) {
4817                         MonoInst *ins_iconst;
4818
4819                         MONO_INST_NEW (cfg, ins, OP_ATOMIC_ADD_NEW_I4);
4820                         MONO_INST_NEW (cfg, ins_iconst, OP_ICONST);
4821                         ins_iconst->inst_c0 = 1;
4822
4823                         ins->inst_i0 = args [0];
4824                         ins->inst_i1 = ins_iconst;
4825                 } else if (strcmp (cmethod->name, "Decrement") == 0 &&
4826                            fsig->params [0]->type == MONO_TYPE_I4) {
4827                         MonoInst *ins_iconst;
4828
4829                         MONO_INST_NEW (cfg, ins, OP_ATOMIC_ADD_NEW_I4);
4830                         MONO_INST_NEW (cfg, ins_iconst, OP_ICONST);
4831                         ins_iconst->inst_c0 = -1;
4832
4833                         ins->inst_i0 = args [0];
4834                         ins->inst_i1 = ins_iconst;
4835                 } else if (strcmp (cmethod->name, "Exchange") == 0 &&
4836                            fsig->params [0]->type == MONO_TYPE_I4) {
4837                         MONO_INST_NEW (cfg, ins, OP_ATOMIC_EXCHANGE_I4);
4838
4839                         ins->inst_i0 = args [0];
4840                         ins->inst_i1 = args [1];
4841                 } else if (strcmp (cmethod->name, "Add") == 0 &&
4842                            fsig->params [0]->type == MONO_TYPE_I4) {
4843                         MONO_INST_NEW (cfg, ins, OP_ATOMIC_ADD_I4);
4844
4845                         ins->inst_i0 = args [0];
4846                         ins->inst_i1 = args [1];
4847                 }
4848         }
4849         return ins;
4850 }
4851
4852 /*========================= End of Function ========================*/
4853
4854 /*------------------------------------------------------------------*/
4855 /*                                                                  */
4856 /* Name         - mono_arch_print_tree                              */
4857 /*                                                                  */
4858 /* Function     - Print platform-specific opcode details.           */
4859 /*                                                                  */
4860 /* Returns      - 1 - opcode details have been printed              */
4861 /*                0 - opcode details have not been printed          */
4862 /*                                                                  */
4863 /*------------------------------------------------------------------*/
4864
4865 gboolean
4866 mono_arch_print_tree (MonoInst *tree, int arity)
4867 {
4868         gboolean done;
4869
4870         switch (tree->opcode) {
4871                 case OP_S390_LOADARG:
4872                 case OP_S390_ARGREG:
4873                 case OP_S390_ARGPTR:
4874                         printf ("[0x%lx(%s)]", tree->inst_offset,
4875                                 mono_arch_regname (tree->inst_basereg));
4876                         done = 1;
4877                         break;
4878                 case OP_S390_STKARG:
4879                         printf ("[0x%lx(previous_frame)]",
4880                                 tree->inst_offset);
4881                         done = 1;
4882                         break;
4883                 case OP_S390_MOVE:
4884                         printf ("[0x%lx(%d,%s),0x%lx(%s)]",
4885                                 tree->inst_offset, tree->backend.size,
4886                                 mono_arch_regname(tree->dreg), tree->inst_imm,
4887                                 mono_arch_regname(tree->sreg1));
4888                         done = 1;
4889                         break;
4890                 case OP_S390_SETF4RET:
4891                         printf ("[%s,%s]",
4892                                 mono_arch_fregname (tree->dreg),
4893                                 mono_arch_fregname (tree->sreg1));
4894                         done = 1;
4895                         break;
4896                 case OP_TLS_GET:
4897                         printf ("[0x%lx(0x%lx,%s)]", tree->inst_offset,
4898                                 tree->inst_imm,
4899                                 mono_arch_regname (tree->sreg1));
4900                         done = 1;
4901                         break;
4902                 case OP_S390_BKCHAIN:
4903                         printf ("[previous_frame(%s)]",
4904                                 mono_arch_regname (tree->sreg1));
4905                         done = 1;
4906                         break;
4907                 default:
4908                         done = 0;
4909         }
4910         return (done);
4911 }
4912
4913 /*========================= End of Function ========================*/
4914
4915 /*------------------------------------------------------------------*/
4916 /*                                                                  */
4917 /* Name         - mono_arch_regalloc_cost                           */
4918 /*                                                                  */
4919 /* Function     - Determine the cost, in the number of memory       */
4920 /*                references, of the action of allocating the var-  */
4921 /*                iable VMV into a register during global register  */
4922 /*                allocation.                                       */
4923 /*                                                                  */
4924 /* Returns      - Cost                                              */
4925 /*                                                                  */
4926 /*------------------------------------------------------------------*/
4927
4928 guint32
4929 mono_arch_regalloc_cost (MonoCompile *cfg, MonoMethodVar *vmv)
4930 {
4931         /* FIXME: */
4932         return 2;
4933 }
4934
4935 /*========================= End of Function ========================*/
4936
4937 /*------------------------------------------------------------------*/
4938 /*                                                                  */
4939 /* Name         - mono_arch_get_domain_intrinsic                    */
4940 /*                                                                  */
4941 /* Function     -                                                   */
4942 /*                                                                  */
4943 /* Returns      -                                                   */
4944 /*                                                                  */
4945 /*------------------------------------------------------------------*/
4946
4947 MonoInst *
4948 mono_arch_get_domain_intrinsic (MonoCompile* cfg)
4949 {
4950         MonoInst *ins;
4951
4952         if (appdomain_tls_offset == -1)
4953                 return NULL;
4954
4955         MONO_INST_NEW (cfg, ins, OP_TLS_GET);
4956         ins->inst_offset = appdomain_tls_offset;
4957         return (ins);
4958 }
4959
4960 /*========================= End of Function ========================*/
4961
4962 /*------------------------------------------------------------------*/
4963 /*                                                                  */
4964 /* Name         - mono_arch_get_thread_intrinsic                    */
4965 /*                                                                  */
4966 /* Function     -                                                   */
4967 /*                                                                  */
4968 /* Returns      -                                                   */
4969 /*                                                                  */
4970 /*------------------------------------------------------------------*/
4971
4972 MonoInst *
4973 mono_arch_get_thread_intrinsic (MonoCompile* cfg)
4974 {
4975         MonoInst *ins;
4976
4977         if (thread_tls_offset == -1)
4978                 return NULL;
4979
4980         MONO_INST_NEW (cfg, ins, OP_TLS_GET);
4981         ins->inst_offset = thread_tls_offset;
4982         return (ins);
4983 }
4984
4985 /*========================= End of Function ========================*/
4986
4987 /*------------------------------------------------------------------*/
4988 /*                                                                  */
4989 /* Name         - mono_arch_flush_register_windows                  */
4990 /*                                                                  */
4991 /* Function     -                                                   */
4992 /*                                                                  */
4993 /* Returns      -                                                   */
4994 /*                                                                  */
4995 /*------------------------------------------------------------------*/
4996
4997 void
4998 mono_arch_flush_register_windows (void)
4999 {
5000 }
5001
5002 /*========================= End of Function ========================*/
5003
5004 /*------------------------------------------------------------------*/
5005 /*                                                                  */
5006 /* Name         - mono_arch_get_lmf_addr                            */
5007 /*                                                                  */
5008 /* Function     -                                                   */
5009 /*                                                                  */
5010 /* Returns      -                                                   */
5011 /*                                                                  */
5012 /*------------------------------------------------------------------*/
5013
5014 gpointer
5015 mono_arch_get_lmf_addr (void)
5016 {
5017         return pthread_getspecific (lmf_addr_key);
5018 }
5019
5020
5021 /*========================= End of Function ========================*/
5022
5023 /*------------------------------------------------------------------*/
5024 /*                                                                  */
5025 /* Name         - mono_arch_get_patch_offset                        */
5026 /*                                                                  */
5027 /* Function     - Dummy entry point until s390x supports aot.       */
5028 /*                                                                  */
5029 /* Returns      - Offset for patch.                                 */
5030 /*                                                                  */
5031 /*------------------------------------------------------------------*/
5032
5033 guint32
5034 mono_arch_get_patch_offset (guint8 *code)
5035 {
5036         return 0;
5037 }
5038
5039 /*========================= End of Function ========================*/