mono/mini/mini-s390.c

   1 /*------------------------------------------------------------------*/
   2 /*                                                                  */
   3 /* Name        - mini-s390.c                                        */
   4 /*                                                                  */
   5 /* Function    - S/390 backend for the Mono code generator.         */
   6 /*                                                                  */
   7 /* Name        - Neale Ferguson (Neale.Ferguson@SoftwareAG-usa.com) */
   8 /*                                                                  */
   9 /* Date        - January, 2004                                      */
  10 /*                                                                  */
  11 /* Derivation  - From mini-x86 & mini-ppc by -                      */
  12 /*               Paolo Molaro (lupus@ximian.com)                    */
  13 /*               Dietmar Maurer (dietmar@ximian.com)                */
  14 /*                                                                  */
  15 /*------------------------------------------------------------------*/
  16
  17 /*------------------------------------------------------------------*/
  18 /*                 D e f i n e s                                    */
  19 /*------------------------------------------------------------------*/
  20
  21 #define NOT_IMPLEMENTED(x) \
  22         g_error ("FIXME: %s is not yet implemented.", x);
  23
  24 #define EMIT_COND_BRANCH(ins,cond)                                                      \
  25 {                                                                                       \
  26 if (ins->flags & MONO_INST_BRLABEL) {                                                   \
  27         if (ins->inst_i0->inst_c0) {                                                    \
  28                 int displace;                                                           \
  29                 displace = ((cfg->native_code + ins->inst_i0->inst_c0) - code) / 2;     \
  30                 if (s390_is_imm16(displace)) {                                          \
  31                         s390_brc (code, cond, displace);                                \
  32                 } else {                                                                \
  33                         s390_jcl (code, cond, displace);                                \
  34                 }                                                                       \
  35         } else {                                                                        \
  36                 mono_add_patch_info (cfg, code - cfg->native_code,                      \
  37                                      MONO_PATCH_INFO_LABEL, ins->inst_i0);              \
  38                 s390_jcl (code, cond, 0);                                               \
  39         }                                                                               \
  40 } else {                                                                                \
  41         if (ins->inst_true_bb->native_offset) {                                         \
  42                 int displace;                                                           \
  43                 displace = ((cfg->native_code +                                         \
  44                             ins->inst_true_bb->native_offset) - code) / 2;              \
  45                 if (s390_is_imm16(displace)) {                                          \
  46                         s390_brc (code, cond, displace);                                \
  47                 } else {                                                                \
  48                         s390_jcl (code, cond, displace);                                \
  49                 }                                                                       \
  50         } else {                                                                        \
  51                 mono_add_patch_info (cfg, code - cfg->native_code,                      \
  52                                      MONO_PATCH_INFO_BB, ins->inst_true_bb);            \
  53                 s390_jcl (code, cond, 0);                                               \
  54         }                                                                               \
  55 }                                                                                       \
  56 }
  57
  58 #define EMIT_UNCOND_BRANCH(ins)                                                         \
  59 {                                                                                       \
  60 if (ins->flags & MONO_INST_BRLABEL) {                                                   \
  61         if (ins->inst_i0->inst_c0) {                                                    \
  62                 int displace;                                                           \
  63                 displace = ((cfg->native_code + ins->inst_i0->inst_c0) - code) / 2;     \
  64                 if (s390_is_imm16(displace)) {                                          \
  65                         s390_brc (code, S390_CC_UN, displace);                          \
  66                 } else {                                                                \
  67                         s390_jcl (code, S390_CC_UN, displace);                          \
  68                 }                                                                       \
  69         } else {                                                                        \
  70                 mono_add_patch_info (cfg, code - cfg->native_code,                      \
  71                                      MONO_PATCH_INFO_LABEL, ins->inst_i0);              \
  72                 s390_jcl (code, S390_CC_UN, 0);                                         \
  73         }                                                                               \
  74 } else {                                                                                \
  75         if (ins->inst_target_bb->native_offset) {                                       \
  76                 int displace;                                                           \
  77                 displace = ((cfg->native_code +                                         \
  78                             ins->inst_target_bb->native_offset) - code) / 2;            \
  79                 if (s390_is_imm16(displace)) {                                          \
  80                         s390_brc (code, S390_CC_UN, displace);                          \
  81                 } else {                                                                \
  82                         s390_jcl (code, S390_CC_UN, displace);                          \
  83                 }                                                                       \
  84         } else {                                                                        \
  85                 mono_add_patch_info (cfg, code - cfg->native_code,                      \
  86                                      MONO_PATCH_INFO_BB, ins->inst_target_bb);          \
  87                 s390_jcl (code, S390_CC_UN, 0);                                         \
  88         }                                                                               \
  89 }                                                                                       \
  90 }
  91
  92 #define EMIT_COND_SYSTEM_EXCEPTION(cond,exc_name)                       \
  93         do {                                                            \
  94                 mono_add_patch_info (cfg, code - cfg->native_code,      \
  95                                     MONO_PATCH_INFO_EXC, exc_name);     \
  96                 s390_jcl (code, cond, 0);                               \
  97         } while (0);
  98
  99 #define CHECK_SRCDST_COM                                                \
 100         if (ins->dreg == ins->sreg2) {                                  \
 101                 src2 = ins->sreg1;                                      \
 102         } else {                                                        \
 103                 src2 = ins->sreg2;                                      \
 104                 if (ins->dreg != ins->sreg1) {                          \
 105                         s390_lr  (code, ins->dreg, ins->sreg1);         \
 106                 }                                                       \
 107         }
 108
 109 #define CHECK_SRCDST_NCOM                                               \
 110         if (ins->dreg == ins->sreg2) {                                  \
 111                 src2 = s390_r13;                                        \
 112                 s390_lr  (code, s390_r13, ins->sreg2);                  \
 113         } else {                                                        \
 114                 src2 = ins->sreg2;                                      \
 115         }                                                               \
 116         if (ins->dreg != ins->sreg1) {                                  \
 117                 s390_lr  (code, ins->dreg, ins->sreg1);                 \
 118         }
 119
 120 #define CHECK_SRCDST_COM_F                                              \
 121         if (ins->dreg == ins->sreg2) {                                  \
 122                 src2 = ins->sreg1;                                      \
 123         } else {                                                        \
 124                 src2 = ins->sreg2;                                      \
 125                 if (ins->dreg != ins->sreg1) {                          \
 126                         s390_ldr (code, ins->dreg, ins->sreg1);         \
 127                 }                                                       \
 128         }
 129
 130 #define CHECK_SRCDST_NCOM_F                                             \
 131         if (ins->dreg == ins->sreg2) {                                  \
 132                 src2 = s390_f15;                                        \
 133                 s390_ldr (code, s390_r13, ins->sreg2);                  \
 134         } else {                                                        \
 135                 src2 = ins->sreg2;                                      \
 136         }                                                               \
 137         if (ins->dreg != ins->sreg1) {                                  \
 138                 s390_ldr (code, ins->dreg, ins->sreg1);                 \
 139         }
 140
 141 #undef DEBUG
 142 #define DEBUG(a) if (cfg->verbose_level > 1) a
 143
 144 #define MAX_EXC 16
 145
 146 #define S390_TRACE_STACK_SIZE (5*sizeof(gint32)+3*sizeof(gdouble))
 147
 148 #define MAX (a, b) ((a) > (b) ? (a) : (b))
 149
 150 /*========================= End of Defines =========================*/
 151
 152 /*------------------------------------------------------------------*/
 153 /*                 I n c l u d e s                                  */
 154 /*------------------------------------------------------------------*/
 155
 156 #include "mini.h"
 157 #include <string.h>
 158
 159 #include <mono/metadata/appdomain.h>
 160 #include <mono/metadata/debug-helpers.h>
 161 #include <mono/metadata/profiler-private.h>
 162 #include <mono/utils/mono-math.h>
 163
 164 #include "mini-s390.h"
 165 #include "inssel.h"
 166 #include "cpu-s390.h"
 167
 168 /*========================= End of Includes ========================*/
 169
 170 /*------------------------------------------------------------------*/
 171 /*                 T y p e d e f s                                  */
 172 /*------------------------------------------------------------------*/
 173
 174 typedef struct {
 175         guint stack_size,
 176               local_size,
 177               code_size,
 178               parm_size,
 179               offset,
 180               offStruct,
 181               retStruct;
 182 } size_data;
 183
 184 /*------------------------------------------------------------------*/
 185 /* Used by the instrument_emit_epilog                               */
 186 /*------------------------------------------------------------------*/
 187
 188 enum {
 189         SAVE_NONE,
 190         SAVE_STRUCT,
 191         SAVE_ONE,
 192         SAVE_TWO,
 193         SAVE_R4,
 194         SAVE_R8
 195 };
 196
 197 typedef struct InstList InstList;
 198
 199 struct InstList {
 200         InstList *prev;
 201         InstList *next;
 202         MonoInst *data;
 203 };
 204
 205 enum {
 206         RegTypeGeneral,
 207         RegTypeBase,
 208         RegTypeFP,
 209         RegTypeStructByVal,
 210         RegTypeStructByAddr
 211 };
 212
 213 typedef struct {
 214         gint32  offset;         /* offset from caller's stack */
 215         gint32  offparm;        /* offset from callee's stack */
 216         guint16 vtsize;         /* in param area */
 217         guint8  reg;
 218         guint8  regtype;        /* See RegType* */
 219         guint32 size;           /* Size of structure used by RegTypeStructByVal */
 220 } ArgInfo;
 221
 222 typedef struct {
 223         int nargs;
 224         int lastgr;
 225         guint32 stack_usage;
 226         guint32 struct_ret;
 227         ArgInfo ret;
 228         ArgInfo sigCookie;
 229         ArgInfo args [1];
 230 } CallInfo;
 231
 232 typedef struct {
 233         gint32  gr[5];          /* R2-R6                            */
 234         gdouble fp[3];          /* F0-F2                            */
 235 } __attribute__ ((packed)) RegParm;
 236
 237 /*========================= End of Typedefs ========================*/
 238
 239 /*------------------------------------------------------------------*/
 240 /*                   P r o t o t y p e s                            */
 241 /*------------------------------------------------------------------*/
 242
 243 static void indent (int);
 244 static guint8 * backUpStackPtr(MonoCompile *, guint8 *, gint);
 245 static void decodeParm (MonoType *, void *, int);
 246 static void enter_method (MonoMethod *, RegParm *, char *);
 247 static void leave_method (MonoMethod *, ...);
 248 static gboolean is_regsize_var (MonoType *);
 249 static inline void add_general (guint *, size_data *, ArgInfo *, gboolean);
 250 static inline void add_stackParm (guint *, size_data *, ArgInfo *, gint);
 251 static inline void add_float (guint *, size_data *, ArgInfo *);
 252 static CallInfo * calculate_sizes (MonoMethodSignature *, size_data *, gboolean);
 253 static void peephole_pass (MonoCompile *, MonoBasicBlock *);
 254 static guchar * emit_float_to_int (MonoCompile *, guchar *, int, int, int, gboolean);
 255 static void mono_arch_break(void);
 256 gpointer mono_arch_get_lmf_addr (void);
 257 static guint8 * emit_load_volatile_registers(guint8 *, MonoCompile *);
 258 static void emit_sig_cookie (MonoCompile *, MonoCallInst *, CallInfo *, int);
 259
 260 /*========================= End of Prototypes ======================*/
 261
 262 /*------------------------------------------------------------------*/
 263 /*                 G l o b a l   V a r i a b l e s                  */
 264 /*------------------------------------------------------------------*/
 265
 266 int mono_exc_esp_offset = 0;
 267
 268 static int indent_level = 0;
 269
 270 static gboolean tls_offset_inited = FALSE;
 271
 272 static int appdomain_tls_offset = -1,
 273            lmf_tls_offset = -1,
 274            thread_tls_offset = -1;
 275
 276 pthread_key_t lmf_addr_key;
 277
 278 gboolean lmf_addr_key_inited = FALSE;
 279
 280 #if 0
 281
 282 extern __thread MonoDomain *tls_appdomain;
 283 extern __thread MonoThread *tls_current_object;
 284 extern __thread gpointer   mono_lmf_addr;
 285
 286 #endif
 287
 288 /*====================== End of Global Variables ===================*/
 289
 290 /*------------------------------------------------------------------*/
 291 /*                                                                  */
 292 /* Name         - mono_arch_regname                                 */
 293 /*                                                                  */
 294 /* Function     - Returns the name of the register specified by     */
 295 /*                the input parameter.                              */
 296 /*                                                                  */
 297 /*------------------------------------------------------------------*/
 298
 299 const char*
 300 mono_arch_regname (int reg) {
 301         static const char * rnames[] = {
 302                 "s390_r0", "s390_sp", "s390_r2", "s390_r3", "s390_r4",
 303                 "s390_r5", "s390_r6", "s390_r7", "s390_r8", "s390_r9",
 304                 "s390_r10", "s390_r11", "s390_r12", "s390_r13", "s390_r14",
 305                 "s390_r15"
 306         };
 307
 308         if (reg >= 0 && reg < 16)
 309                 return rnames [reg];
 310         else
 311                 return "unknown";
 312 }
 313
 314 /*========================= End of Function ========================*/
 315
 316 /*------------------------------------------------------------------*/
 317 /*                                                                  */
 318 /* Name         - mono_arch_fregname                                */
 319 /*                                                                  */
 320 /* Function     - Returns the name of the register specified by     */
 321 /*                the input parameter.                              */
 322 /*                                                                  */
 323 /*------------------------------------------------------------------*/
 324
 325 const char*
 326 mono_arch_fregname (int reg) {
 327         static const char * rnames[] = {
 328                 "s390_f0", "s390_f1", "s390_f2", "s390_f3", "s390_f4",
 329                 "s390_f5", "s390_f6", "s390_f7", "s390_f8", "s390_f9",
 330                 "s390_f10", "s390_f11", "s390_f12", "s390_f13", "s390_f14",
 331                 "s390_f15"
 332         };
 333
 334         if (reg >= 0 && reg < 16)
 335                 return rnames [reg];
 336         else
 337                 return "unknown";
 338 }
 339
 340 /*========================= End of Function ========================*/
 341
 342 /*------------------------------------------------------------------*/
 343 /*                                                                  */
 344 /* Name         - arch_get_argument_info                            */
 345 /*                                                                  */
 346 /* Function     - Gathers information on parameters such as size,   */
 347 /*                alignment, and padding. arg_info should be large  */
 348 /*                enough to hold param_count + 1 entries.           */
 349 /*                                                                  */
 350 /* Parameters   - @csig - Method signature                          */
 351 /*                @param_count - No. of parameters to consider      */
 352 /*                @arg_info - An array to store the result info     */
 353 /*                                                                  */
 354 /* Returns      - Size of the activation frame                      */
 355 /*                                                                  */
 356 /*------------------------------------------------------------------*/
 357
 358 int
 359 mono_arch_get_argument_info (MonoMethodSignature *csig,
 360                              int param_count,
 361                              MonoJitArgumentInfo *arg_info)
 362 {
 363         int k, frame_size = 0;
 364         int size, align, pad;
 365         int offset = 8;
 366
 367         if (MONO_TYPE_ISSTRUCT (csig->ret)) {
 368                 frame_size += sizeof (gpointer);
 369                 offset += 4;
 370         }
 371
 372         arg_info [0].offset = offset;
 373
 374         if (csig->hasthis) {
 375                 frame_size += sizeof (gpointer);
 376                 offset += 4;
 377         }
 378
 379         arg_info [0].size = frame_size;
 380
 381         for (k = 0; k < param_count; k++) {
 382
 383                 if (csig->pinvoke)
 384                         size = mono_type_native_stack_size (csig->params [k], &align);
 385                 else
 386                         size = mono_type_stack_size (csig->params [k], &align);
 387
 388                 frame_size += pad = (align - (frame_size & (align - 1))) & (align - 1);
 389                 arg_info [k].pad = pad;
 390                 frame_size += size;
 391                 arg_info [k + 1].pad = 0;
 392                 arg_info [k + 1].size = size;
 393                 offset += pad;
 394                 arg_info [k + 1].offset = offset;
 395                 offset += size;
 396         }
 397
 398         align = MONO_ARCH_FRAME_ALIGNMENT;
 399         frame_size += pad = (align - (frame_size & (align - 1))) & (align - 1);
 400         arg_info [k].pad = pad;
 401
 402         return frame_size;
 403 }
 404
 405 /*========================= End of Function ========================*/
 406
 407 /*------------------------------------------------------------------*/
 408 /*                                                                  */
 409 /* Name         - retFitsInReg.                                     */
 410 /*                                                                  */
 411 /* Function     - Determines if a value can be returned in one or   */
 412 /*                two registers.                                    */
 413 /*                                                                  */
 414 /*------------------------------------------------------------------*/
 415
 416 static inline gboolean
 417 retFitsInReg(guint32 size)
 418 {
 419         switch (size) {
 420                 case 0:
 421                 case 1:
 422                 case 2:
 423                 case 4:
 424                 case 8:
 425                         return (TRUE);
 426                 break;
 427                 default:
 428                         return (FALSE);
 429         }
 430 }
 431
 432 /*========================= End of Function ========================*/
 433
 434 /*------------------------------------------------------------------*/
 435 /*                                                                  */
 436 /* Name         - backStackPtr.                                     */
 437 /*                                                                  */
 438 /* Function     - Restore Stack Pointer to previous frame.          */
 439 /*                                                                  */
 440 /*------------------------------------------------------------------*/
 441
 442 static inline guint8 *
 443 backUpStackPtr(MonoCompile *cfg, guint8 *code, gint framePtr)
 444 {
 445         int stackSize = cfg->stack_usage;
 446
 447         if (s390_is_uimm16 (cfg->stack_usage)) {
 448                 s390_ahi  (code, framePtr, cfg->stack_usage);
 449         } else {
 450                 while (stackSize > 32767) {
 451                         s390_ahi  (code, framePtr, 32767);
 452                         stackSize -= 32767;
 453                 }
 454                 s390_ahi  (code, framePtr, stackSize);
 455         }
 456         return (code);
 457 }
 458
 459 /*========================= End of Function ========================*/
 460
 461 /*------------------------------------------------------------------*/
 462 /*                                                                  */
 463 /* Name         - indent                                            */
 464 /*                                                                  */
 465 /* Function     - Perform nice indenting to current level           */
 466 /*                                                                  */
 467 /*------------------------------------------------------------------*/
 468
 469 static void
 470 indent (int diff) {
 471         int v;
 472         if (diff < 0)
 473                 indent_level += diff;
 474         v = indent_level;
 475         printf("[%3d] ",v);
 476         while (v-- > 0) {
 477                 printf (". ");
 478         }
 479         if (diff > 0)
 480                 indent_level += diff;
 481 }
 482
 483 /*========================= End of Function ========================*/
 484
 485 /*------------------------------------------------------------------*/
 486 /*                                                                  */
 487 /* Name         - decodeParm                                        */
 488 /*                                                                  */
 489 /* Function     - Decode a parameter for the trace.                 */
 490 /*                                                                  */
 491 /*------------------------------------------------------------------*/
 492
 493 static void
 494 decodeParm(MonoType *type, void *curParm, int size)
 495 {
 496         guint32 simpleType;
 497
 498         if (type->byref) {
 499                 printf("[BYREF:%p], ", *((char **) curParm));
 500         } else {
 501                 simpleType = mono_type_get_underlying_type(type)->type;
 502 enum_parmtype:
 503                 switch (simpleType) {
 504                         case MONO_TYPE_I :
 505                                 printf ("[INTPTR:%p], ", *((int **) curParm));
 506                                 break;
 507                         case MONO_TYPE_U :
 508                                 printf ("[UINTPTR:%p], ", *((int **) curParm));
 509                                 break;
 510                         case MONO_TYPE_BOOLEAN :
 511                                 printf ("[BOOL:%d], ", *((int *) curParm));
 512                                 break;
 513                         case MONO_TYPE_CHAR :
 514                                 printf ("[CHAR:%c], ", *((int *) curParm));
 515                                 break;
 516                         case MONO_TYPE_I1 :
 517                                 printf ("[INT1:%d], ", *((int *) curParm));
 518                                 break;
 519                         case MONO_TYPE_I2 :
 520                                 printf ("[INT2:%d], ", *((int *) curParm));
 521                                 break;
 522                         case MONO_TYPE_I4 :
 523                                 printf ("[INT4:%d], ", *((int *) curParm));
 524                                 break;
 525                         case MONO_TYPE_U1 :
 526                                 printf ("[UINT1:%u], ", *((unsigned int *) curParm));
 527                                 break;
 528                         case MONO_TYPE_U2 :
 529                                 printf ("[UINT2:%u], ", *((guint16 *) curParm));
 530                                 break;
 531                         case MONO_TYPE_U4 :
 532                                 printf ("[UINT4:%u], ", *((guint32 *) curParm));
 533                                 break;
 534                         case MONO_TYPE_U8 :
 535                                 printf ("[UINT8:%llu], ", *((guint64 *) curParm));
 536                                 break;
 537                         case MONO_TYPE_STRING : {
 538                                 MonoString *s = *((MonoString **) curParm);
 539                                 if (s) {
 540                                         g_assert (((MonoObject *) s)->vtable->klass == mono_defaults.string_class);
 541                                         printf("[STRING:%p:%s], ", s, mono_string_to_utf8(s));
 542                                 } else {
 543                                         printf("[STRING:null], ");
 544                                 }
 545                                 break;
 546                         }
 547                         case MONO_TYPE_CLASS :
 548                         case MONO_TYPE_OBJECT : {
 549                                 MonoObject *obj = *((MonoObject **) curParm);
 550                                 MonoClass *class;
 551                                 if ((obj) && (obj->vtable)) {
 552                                         printf("[CLASS/OBJ:");
 553                                         class = obj->vtable->klass;
 554                                         printf("%p [%p] ",obj,curParm);
 555 //                                      if (class == mono_defaults.string_class) {
 556 //                                              printf("[STRING:%p:%s]",
 557 //                                                     *obj, mono_string_to_utf8 (obj));
 558 //                                      } else if (class == mono_defaults.int32_class) {
 559 //                                              printf("[INT32:%p:%d]",
 560 //                                                      obj, *(gint32 *)((char *)obj + sizeof (MonoObject)));
 561 //                                      } else
 562 //                                              printf("[%s.%s:%p]",
 563 //                                                     class->name_space, class->name, obj);
 564                                         printf("], ");
 565                                 } else {
 566                                         printf("[OBJECT:null], ");
 567                                 }
 568                                 break;
 569                         }
 570                         case MONO_TYPE_PTR :
 571                                 printf("[PTR:%p], ", *((gpointer **) (curParm)));
 572                                 break;
 573                         case MONO_TYPE_FNPTR :
 574                                 printf("[FNPTR:%p], ", *((gpointer **) (curParm)));
 575                                 break;
 576                         case MONO_TYPE_ARRAY :
 577                                 printf("[ARRAY:%p], ", *((gpointer **) (curParm)));
 578                                 break;
 579                         case MONO_TYPE_SZARRAY :
 580                                 printf("[SZARRAY:%p], ", *((gpointer **) (curParm)));
 581                                 break;
 582                         case MONO_TYPE_I8 :
 583                                 printf("[INT8:%lld], ", *((gint64 *) (curParm)));
 584                                 break;
 585                         case MONO_TYPE_R4 :
 586                                 printf("[FLOAT4:%g], ", *((double *) (curParm)));
 587                                 break;
 588                         case MONO_TYPE_R8 :
 589                                 printf("[FLOAT8:%g], ", *((double *) (curParm)));
 590                                 break;
 591                         case MONO_TYPE_VALUETYPE : {
 592                                 int i;
 593                                 MonoMarshalType *info;
 594
 595                                 if (type->data.klass->enumtype) {
 596                                         simpleType = type->data.klass->enum_basetype->type;
 597                                         printf("{VALUETYPE} - ");
 598                                         goto enum_parmtype;
 599                                 }
 600
 601                                 info = mono_marshal_load_type_info (type->data.klass);
 602
 603                                 if ((info->native_size == sizeof(float)) &&
 604                                     (info->num_fields  == 1) &&
 605                                     (info->fields[0].field->type->type == MONO_TYPE_R4)) {
 606                                                 printf("[FLOAT4:%f], ", *((float *) (curParm)));
 607                                         break;
 608                                 }
 609
 610                                 if ((info->native_size == sizeof(double)) &&
 611                                     (info->num_fields  == 1) &&
 612                                     (info->fields[0].field->type->type == MONO_TYPE_R8)) {
 613                                         printf("[FLOAT8:%g], ", *((double *) (curParm)));
 614                                         break;
 615                                 }
 616
 617                                 printf("[VALUETYPE:");
 618                                 for (i = 0; i < size; i++)
 619                                         printf("%02x,", *((guint8 *)curParm+i));
 620                                 printf("]");
 621                                 break;
 622                         }
 623                         case MONO_TYPE_TYPEDBYREF: {
 624                                 int i;
 625                                 printf("[TYPEDBYREF:");
 626                                 for (i = 0; i < size; i++)
 627                                         printf("%02x,", *((guint8 *)curParm+i));
 628                                 printf("]");
 629                                 break;
 630                         }
 631                         default :
 632                                 printf("[?? - %d], ",simpleType);
 633                 }
 634         }
 635 }
 636
 637 /*========================= End of Function ========================*/
 638
 639 static int lc = 0;
 640 /*------------------------------------------------------------------*/
 641 /*                                                                  */
 642 /* Name         - enter_method                                      */
 643 /*                                                                  */
 644 /* Function     - Perform tracing of the entry to the current       */
 645 /*                method.                                           */
 646 /*                                                                  */
 647 /*------------------------------------------------------------------*/
 648
 649 static void
 650 enter_method (MonoMethod *method, RegParm *rParm, char *sp)
 651 {
 652         int i, oParm = 0, iParm = 0;
 653         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                         /* prepend, we'll need to reverse them later */
1871                         arg->ins.next       = call->out_args;
1872                         call->out_args      = (MonoInst *) arg;
1873                         arg->ins.inst_right = (MonoInst *) call;
1874                         if (ainfo->regtype == RegTypeGeneral) {
1875                                 arg->ins.backend.reg3   = ainfo->reg;
1876                                 call->used_iregs |= 1 << ainfo->reg;
1877                                 if (arg->ins.type == STACK_I8)
1878                                         call->used_iregs |= 1 << (ainfo->reg + 1);
1879                         } else if (ainfo->regtype == RegTypeStructByAddr) {
1880                                 call->used_iregs |= 1 << ainfo->reg;
1881                                 arg->ins.sreg1    = ainfo->reg;
1882                                 arg->ins.opcode   = OP_OUTARG_VT;
1883                                 arg->size         = -ainfo->vtsize;
1884                                 arg->offset       = ainfo->offset;
1885                                 arg->offPrm       = ainfo->offparm + sz.offStruct;
1886                         } else if (ainfo->regtype == RegTypeStructByVal) {
1887                                 if (ainfo->reg != STK_BASE) {
1888                                         switch (ainfo->size) {
1889                                         case 0:
1890                                         case 1:
1891                                         case 2:
1892                                         case 4:
1893                                                 call->used_iregs |= 1 << ainfo->reg;
1894                                                 break;
1895                                         case 8:
1896                                                 call->used_iregs |= 1 << ainfo->reg;
1897                                                 call->used_iregs |= 1 << (ainfo->reg+1);
1898                                                 break;
1899                                         default:
1900                                                 call->used_iregs |= 1 << ainfo->reg;
1901                                         }
1902                                 }
1903                                 arg->ins.sreg1  = ainfo->reg;
1904                                 arg->ins.opcode = OP_OUTARG_VT;
1905                                 arg->size       = ainfo->size;
1906                                 arg->offset     = ainfo->offset;
1907                                 arg->offPrm     = ainfo->offparm + sz.offStruct;
1908                         } else if (ainfo->regtype == RegTypeBase) {
1909                                 arg->ins.opcode   = OP_OUTARG_MEMBASE;
1910                                 arg->ins.sreg1    = ainfo->reg;
1911                                 arg->size         = ainfo->size;
1912                                 arg->offset       = ainfo->offset;
1913                                 call->used_iregs |= 1 << ainfo->reg;
1914                         } else if (ainfo->regtype == RegTypeFP) {
1915                                 arg->ins.backend.reg3   = ainfo->reg;
1916                                 call->used_fregs |= 1 << ainfo->reg;
1917                                 if (ainfo->size == 4)
1918                                         arg->ins.opcode = OP_OUTARG_R4;
1919                                 else
1920                                         arg->ins.opcode = OP_OUTARG_R8;
1921                         } else {
1922                                 g_assert_not_reached ();
1923                         }
1924                 }
1925         }
1926
1927         /*
1928          * Handle the case where there are no implicit arguments
1929          */
1930         if ((sig->call_convention == MONO_CALL_VARARG) &&
1931             (i == sig->sentinelpos)) {
1932                 emit_sig_cookie (cfg, call, cinfo, ainfo->size);
1933         }
1934
1935         /*
1936          * Reverse the call->out_args list.
1937          */
1938         {
1939                 MonoInst *prev = NULL, *list = call->out_args, *next;
1940                 while (list) {
1941                         next = list->next;
1942                         list->next = prev;
1943                         prev = list;
1944                         list = next;
1945                 }
1946                 call->out_args = prev;
1947         }
1948
1949         g_free (cinfo);
1950         return call;
1951 }
1952
1953 /*========================= End of Function ========================*/
1954
1955 /*------------------------------------------------------------------*/
1956 /*                                                                  */
1957 /* Name         - emit_sig_cookie.                                  */
1958 /*                                                                  */
1959 /* Function     - For variable length parameter lists construct a   */
1960 /*                signature cookie and emit it.                     */
1961 /*                                                                  */
1962 /*------------------------------------------------------------------*/
1963
1964 static void
1965 emit_sig_cookie (MonoCompile *cfg, MonoCallInst *call,
1966                  CallInfo *cinfo, int argSize)
1967 {
1968         MonoCallArgParm *arg;
1969         MonoMethodSignature *tmpSig;
1970         MonoInst *sigArg;
1971
1972         cfg->disable_aot = TRUE;
1973
1974         /*----------------------------------------------------------*/
1975         /* mono_ArgIterator_Setup assumes the signature cookie is   */
1976         /* passed first and all the arguments which were before it  */
1977         /* passed on the stack after the signature. So compensate   */
1978         /* by passing a different signature.                        */
1979         /*----------------------------------------------------------*/
1980         tmpSig = mono_metadata_signature_dup (call->signature);
1981         tmpSig->param_count -= call->signature->sentinelpos;
1982         tmpSig->sentinelpos  = 0;
1983         if (tmpSig->param_count > 0)
1984                 memcpy (tmpSig->params,
1985                         call->signature->params + call->signature->sentinelpos,
1986                         tmpSig->param_count * sizeof(MonoType *));
1987
1988         MONO_INST_NEW (cfg, sigArg, OP_ICONST);
1989         sigArg->inst_p0 = tmpSig;
1990
1991         MONO_INST_NEW_CALL_ARG (cfg, arg, OP_OUTARG_MEMBASE);
1992         arg->ins.inst_left   = sigArg;
1993         arg->ins.inst_right  = (MonoInst *) call;
1994         arg->size            = argSize;
1995         arg->offset          = cinfo->sigCookie.offset;
1996         arg->ins.next        = call->out_args;
1997         call->out_args       = (MonoInst *) arg;
1998 }
1999
2000 /*========================= End of Function ========================*/
2001
2002 /*------------------------------------------------------------------*/
2003 /*                                                                  */
2004 /* Name         - mono_arch_instrument_mem_needs                    */
2005 /*                                                                  */
2006 /* Function     - Allow tracing to work with this interface (with   */
2007 /*                an optional argument).                            */
2008 /*                                                                  */
2009 /*------------------------------------------------------------------*/
2010
2011 void
2012 mono_arch_instrument_mem_needs (MonoMethod *method, int *stack, int *code)
2013 {
2014         /* no stack room needed now (may be needed for FASTCALL-trace support) */
2015         *stack = 0;
2016         /* split prolog-epilog requirements? */
2017         *code = 50; /* max bytes needed: check this number */
2018 }
2019
2020 /*========================= End of Function ========================*/
2021
2022 /*------------------------------------------------------------------*/
2023 /*                                                                  */
2024 /* Name         - mono_arch_instrument_prolog                       */
2025 /*                                                                  */
2026 /* Function     - Create an "instrumented" prolog.                  */
2027 /*                                                                  */
2028 /*------------------------------------------------------------------*/
2029
2030 void*
2031 mono_arch_instrument_prolog (MonoCompile *cfg, void *func, void *p,
2032                              gboolean enable_arguments)
2033 {
2034         guchar  *code = p;
2035         int     parmOffset,
2036                 fpOffset,
2037                 baseReg;
2038
2039         parmOffset = cfg->stack_usage - S390_TRACE_STACK_SIZE;
2040         if (cfg->method->save_lmf)
2041                 parmOffset -= sizeof(MonoLMF);
2042         fpOffset   = parmOffset + (5*sizeof(gint32));
2043         if (fpOffset > 4096) {
2044                 s390_lr (code, s390_r12, STK_BASE);
2045                 baseReg = s390_r12;
2046                 while (fpOffset > 4096) {
2047                         s390_ahi (code, baseReg, 4096);
2048                         fpOffset   -= 4096;
2049                         parmOffset -= 4096;
2050                 }
2051         } else {
2052                 baseReg = STK_BASE;
2053         }
2054
2055         s390_stm  (code, s390_r2, s390_r6, baseReg, parmOffset);
2056         s390_std  (code, s390_f0, 0, baseReg, fpOffset);
2057         s390_std  (code, s390_f1, 0, baseReg, fpOffset+sizeof(gdouble));
2058         s390_std  (code, s390_f2, 0, baseReg, fpOffset+2*sizeof(gdouble));
2059         s390_basr (code, s390_r13, 0);
2060         s390_j    (code, 6);
2061         s390_word (code, cfg->method);
2062         s390_word (code, func);
2063         s390_l    (code, s390_r2, 0, s390_r13, 4);
2064         s390_la   (code, s390_r3, 0, baseReg, parmOffset);
2065         s390_lr   (code, s390_r4, STK_BASE);
2066         s390_ahi  (code, s390_r4, cfg->stack_usage);
2067         s390_l    (code, s390_r1, 0, s390_r13, 8);
2068         s390_basr (code, s390_r14, s390_r1);
2069         s390_ld   (code, s390_f2, 0, baseReg, fpOffset+2*sizeof(gdouble));
2070         s390_ld   (code, s390_f1, 0, baseReg, fpOffset+sizeof(gdouble));
2071         s390_ld   (code, s390_f0, 0, baseReg, fpOffset);
2072         s390_lm   (code, s390_r2, s390_r6, baseReg, parmOffset);
2073
2074         return code;
2075 }
2076
2077 /*========================= End of Function ========================*/
2078
2079 /*------------------------------------------------------------------*/
2080 /*                                                                  */
2081 /* Name         - mono_arch_instrument_epilog                       */
2082 /*                                                                  */
2083 /* Function     - Create an epilog that will handle the returned    */
2084 /*                values used in instrumentation.                   */
2085 /*                                                                  */
2086 /*------------------------------------------------------------------*/
2087
2088 void*
2089 mono_arch_instrument_epilog (MonoCompile *cfg, void *func, void *p, gboolean enable_arguments)
2090 {
2091         guchar     *code = p;
2092         int        save_mode = SAVE_NONE,
2093                    saveOffset;
2094         MonoMethod *method = cfg->method;
2095         int        rtype = mono_type_get_underlying_type (mono_method_signature (method)->ret)->type;
2096
2097         saveOffset = cfg->stack_usage - S390_TRACE_STACK_SIZE;
2098         if (method->save_lmf)
2099                 saveOffset -= sizeof(MonoLMF);
2100
2101 handle_enum:
2102         switch (rtype) {
2103         case MONO_TYPE_VOID:
2104                 /* special case string .ctor icall */
2105                 if (strcmp (".ctor", method->name) && method->klass == mono_defaults.string_class)
2106                         save_mode = SAVE_ONE;
2107                 else
2108                         save_mode = SAVE_NONE;
2109                 break;
2110         case MONO_TYPE_I8:
2111         case MONO_TYPE_U8:
2112                 save_mode = SAVE_TWO;
2113                 break;
2114         case MONO_TYPE_R4:
2115                 save_mode = SAVE_R4;
2116                 break;
2117         case MONO_TYPE_R8:
2118                 save_mode = SAVE_R8;
2119                 break;
2120         case MONO_TYPE_VALUETYPE:
2121                 if (mono_method_signature (method)->ret->data.klass->enumtype) {
2122                         rtype = mono_method_signature (method)->ret->data.klass->enum_basetype->type;
2123                         goto handle_enum;
2124                 }
2125                 save_mode = SAVE_STRUCT;
2126                 break;
2127         default:
2128                 save_mode = SAVE_ONE;
2129                 break;
2130         }
2131
2132         switch (save_mode) {
2133         case SAVE_TWO:
2134                 s390_stm (code, s390_r2, s390_r3, cfg->frame_reg, saveOffset);
2135                 if (enable_arguments) {
2136                         s390_lr (code, s390_r4, s390_r3);
2137                         s390_lr (code, s390_r3, s390_r2);
2138                 }
2139                 break;
2140         case SAVE_ONE:
2141                 s390_st (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2142                 if (enable_arguments) {
2143                         s390_lr (code, s390_r3, s390_r2);
2144                 }
2145                 break;
2146         case SAVE_R4:
2147                 s390_std (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2148                 if (enable_arguments) {
2149                         s390_ldebr (code, s390_f0, s390_f0);
2150                 }
2151                 break;
2152         case SAVE_R8:
2153                 s390_std (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2154                 break;
2155         case SAVE_STRUCT:
2156                 s390_st (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2157                 if (enable_arguments) {
2158                         s390_l (code, s390_r3, 0, cfg->frame_reg,
2159                                 S390_MINIMAL_STACK_SIZE+cfg->param_area);
2160                 }
2161                 break;
2162         case SAVE_NONE:
2163         default:
2164                 break;
2165         }
2166
2167         s390_basr (code, s390_r13, 0);
2168         s390_j    (code, 6);
2169         s390_word (code, cfg->method);
2170         s390_word (code, func);
2171         s390_l    (code, s390_r2, 0, s390_r13, 4);
2172         s390_l    (code, s390_r1, 0, s390_r13, 8);
2173         s390_basr (code, s390_r14, s390_r1);
2174
2175         switch (save_mode) {
2176         case SAVE_TWO:
2177                 s390_lm  (code, s390_r2, s390_r3, cfg->frame_reg, saveOffset);
2178                 break;
2179         case SAVE_ONE:
2180                 s390_l   (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2181                 break;
2182         case SAVE_R4:
2183         case SAVE_R8:
2184                 s390_ld  (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2185                 break;
2186         case SAVE_STRUCT:
2187                 s390_l   (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2188                 break;
2189         case SAVE_NONE:
2190         default:
2191                 break;
2192         }
2193
2194         return code;
2195 }
2196
2197 /*========================= End of Function ========================*/
2198
2199 /*------------------------------------------------------------------*/
2200 /*                                                                  */
2201 /* Name         - peephole_pass                                     */
2202 /*                                                                  */
2203 /* Function     - Form a peephole pass at the code looking for      */
2204 /*                simple optimizations.                             */
2205 /*                                                                  */
2206 /*------------------------------------------------------------------*/
2207
2208 static void
2209 peephole_pass (MonoCompile *cfg, MonoBasicBlock *bb)
2210 {
2211         MonoInst *ins, *last_ins = NULL;
2212         ins = bb->code;
2213
2214         while (ins) {
2215
2216                 switch (ins->opcode) {
2217                 case OP_MUL_IMM:
2218                         /* remove unnecessary multiplication with 1 */
2219                         if (ins->inst_imm == 1) {
2220                                 if (ins->dreg != ins->sreg1) {
2221                                         ins->opcode = OP_MOVE;
2222                                 } else {
2223                                         last_ins->next = ins->next;
2224                                         ins = ins->next;
2225                                         continue;
2226                                 }
2227                         }
2228                         break;
2229                 case OP_LOAD_MEMBASE:
2230                 case OP_LOADI4_MEMBASE:
2231                         /*
2232                          * OP_STORE_MEMBASE_REG reg, offset(basereg)
2233                          * OP_LOAD_MEMBASE offset(basereg), reg
2234                          */
2235                         if (last_ins && (last_ins->opcode == OP_STOREI4_MEMBASE_REG
2236                                          || last_ins->opcode == OP_STORE_MEMBASE_REG) &&
2237                             ins->inst_basereg == last_ins->inst_destbasereg &&
2238                             ins->inst_offset == last_ins->inst_offset) {
2239                                 if (ins->dreg == last_ins->sreg1) {
2240                                         last_ins->next = ins->next;
2241                                         ins = ins->next;
2242                                         continue;
2243                                 } else {
2244                                         ins->opcode = OP_MOVE;
2245                                         ins->sreg1 = last_ins->sreg1;
2246                                 }
2247
2248                         /*
2249                          * Note: reg1 must be different from the basereg in the second load
2250                          * OP_LOAD_MEMBASE offset(basereg), reg1
2251                          * OP_LOAD_MEMBASE offset(basereg), reg2
2252                          * -->
2253                          * OP_LOAD_MEMBASE offset(basereg), reg1
2254                          * OP_MOVE reg1, reg2
2255                          */
2256                         } if (last_ins && (last_ins->opcode == OP_LOADI4_MEMBASE
2257                                            || last_ins->opcode == OP_LOAD_MEMBASE) &&
2258                               ins->inst_basereg != last_ins->dreg &&
2259                               ins->inst_basereg == last_ins->inst_basereg &&
2260                               ins->inst_offset == last_ins->inst_offset) {
2261
2262                                 if (ins->dreg == last_ins->dreg) {
2263                                         last_ins->next = ins->next;
2264                                         ins = ins->next;
2265                                         continue;
2266                                 } else {
2267                                         ins->opcode = OP_MOVE;
2268                                         ins->sreg1 = last_ins->dreg;
2269                                 }
2270
2271                                 //g_assert_not_reached ();
2272
2273 #if 0
2274                         /*
2275                          * OP_STORE_MEMBASE_IMM imm, offset(basereg)
2276                          * OP_LOAD_MEMBASE offset(basereg), reg
2277                          * -->
2278                          * OP_STORE_MEMBASE_IMM imm, offset(basereg)
2279                          * OP_ICONST reg, imm
2280                          */
2281                         } else if (last_ins && (last_ins->opcode == OP_STOREI4_MEMBASE_IMM
2282                                                 || last_ins->opcode == OP_STORE_MEMBASE_IMM) &&
2283                                    ins->inst_basereg == last_ins->inst_destbasereg &&
2284                                    ins->inst_offset == last_ins->inst_offset) {
2285                                 //static int c = 0; printf ("MATCHX %s %d\n", cfg->method->name,c++);
2286                                 ins->opcode = OP_ICONST;
2287                                 ins->inst_c0 = last_ins->inst_imm;
2288                                 g_assert_not_reached (); // check this rule
2289 #endif
2290                         }
2291                         break;
2292                 case OP_LOADU1_MEMBASE:
2293                 case OP_LOADI1_MEMBASE:
2294                         if (last_ins && (last_ins->opcode == OP_STOREI1_MEMBASE_REG) &&
2295                                         ins->inst_basereg == last_ins->inst_destbasereg &&
2296                                         ins->inst_offset == last_ins->inst_offset) {
2297                                 ins->opcode = (ins->opcode == OP_LOADI1_MEMBASE) ? CEE_CONV_I1 : CEE_CONV_U1;
2298                                 ins->sreg1 = last_ins->sreg1;
2299                         }
2300                         break;
2301                 case OP_LOADU2_MEMBASE:
2302                 case OP_LOADI2_MEMBASE:
2303                         if (last_ins && (last_ins->opcode == OP_STOREI2_MEMBASE_REG) &&
2304                                         ins->inst_basereg == last_ins->inst_destbasereg &&
2305                                         ins->inst_offset == last_ins->inst_offset) {
2306                                 ins->opcode = (ins->opcode == OP_LOADI2_MEMBASE) ? CEE_CONV_I2 : CEE_CONV_U2;
2307                                 ins->sreg1 = last_ins->sreg1;
2308                         }
2309                         break;
2310                 case CEE_CONV_I4:
2311                 case CEE_CONV_U4:
2312                 case OP_MOVE:
2313                         /*
2314                          * OP_MOVE reg, reg
2315                          */
2316                         if (ins->dreg == ins->sreg1) {
2317                                 if (last_ins)
2318                                         last_ins->next = ins->next;
2319                                 ins = ins->next;
2320                                 continue;
2321                         }
2322                         /*
2323                          * OP_MOVE sreg, dreg
2324                          * OP_MOVE dreg, sreg
2325                          */
2326                         if (last_ins && last_ins->opcode == OP_MOVE &&
2327                             ins->sreg1 == last_ins->dreg &&
2328                             ins->dreg == last_ins->sreg1) {
2329                                 last_ins->next = ins->next;
2330                                 ins = ins->next;
2331                                 continue;
2332                         }
2333                         break;
2334                 }
2335                 last_ins = ins;
2336                 ins = ins->next;
2337         }
2338         bb->last_ins = last_ins;
2339 }
2340
2341 /*========================= End of Function ========================*/
2342
2343 /*------------------------------------------------------------------*/
2344 /*                                                                  */
2345 /* Name         - mono_arch_local_regalloc.                         */
2346 /*                                                                  */
2347 /* Function     - We first scan the list of instructions and we     */
2348 /*                save the liveness information of each register    */
2349 /*                (when the register is first used, when its value  */
2350 /*                is set etc.). We also reverse the list of instr-  */
2351 /*                uctions (in the InstList list) because assigning  */
2352 /*                registers backwards allows for more tricks to be  */
2353 /*                used.                                             */
2354 /*                                                                  */
2355 /*------------------------------------------------------------------*/
2356
2357 void
2358 mono_arch_local_regalloc (MonoCompile *cfg, MonoBasicBlock *bb)
2359 {
2360         mono_local_regalloc(cfg, bb);
2361 }
2362
2363 /*========================= End of Function ========================*/
2364
2365 /*------------------------------------------------------------------*/
2366 /*                                                                  */
2367 /* Name         - emit_float_to_int                                 */
2368 /*                                                                  */
2369 /* Function     - Create instructions which will convert a floating */
2370 /*                point value to integer.                           */
2371 /*                                                                  */
2372 /*------------------------------------------------------------------*/
2373
2374 static guchar*
2375 emit_float_to_int (MonoCompile *cfg, guchar *code, int dreg, int sreg, int size, gboolean is_signed)
2376 {
2377         /* sreg is a float, dreg is an integer reg. */
2378         if (is_signed) {
2379                 s390_cfdbr (code, dreg, 5, sreg);
2380                 switch (size) {
2381                         case 1:
2382                                 s390_lhi  (code, s390_r0, 0);
2383                                 s390_lhi  (code, s390_r13, 0xff);
2384                                 s390_ltr  (code, dreg, dreg);
2385                                 s390_jnl  (code, 4);
2386                                 s390_lhi  (code, s390_r0, 0x80);
2387                                 s390_nr   (code, dreg, s390_r13);
2388                                 s390_or   (code, dreg, s390_r0);
2389                                 break;
2390                 }
2391         } else {
2392                 short *o[1];
2393                 s390_basr   (code, s390_r13, 0);
2394                 s390_j      (code, 10);
2395                 s390_llong  (code, 0x41e0000000000000);
2396                 s390_llong  (code, 0x41f0000000000000);
2397                 s390_ldr    (code, s390_f15, sreg);
2398                 s390_cdb    (code, s390_f15, 0, s390_r13, 4);
2399                 s390_jl     (code, 0); CODEPTR(code, o[0]);
2400                 s390_sdb    (code, s390_f15, 0, s390_r13, 12);
2401                 s390_cfdbr  (code, dreg, 7, s390_f15);
2402                 s390_j      (code, 4);
2403                 PTRSLOT(code, o[0]);
2404                 s390_cfdbr  (code, dreg, 5, sreg);
2405                 switch (size) {
2406                         case 1:
2407                                 s390_lhi  (code, s390_r0, 0xff);
2408                                 s390_nr   (code, dreg, s390_r0);
2409                                 break;
2410                         case 2:
2411                                 s390_lhi  (code, s390_r0, -1);
2412                                 s390_srl  (code, s390_r0, 0, 16);
2413                                 s390_nr   (code, dreg, s390_r0);
2414                                 break;
2415                 }
2416         }
2417         return code;
2418 }
2419
2420 /*========================= End of Function ========================*/
2421
2422 /*------------------------------------------------------------------*/
2423 /*                                                                  */
2424 /* Name         - mono_arch_output_basic_block                      */
2425 /*                                                                  */
2426 /* Function     - Perform the "real" work of emitting instructions  */
2427 /*                that will do the work of in the basic block.      */
2428 /*                                                                  */
2429 /*------------------------------------------------------------------*/
2430
2431 void
2432 mono_arch_output_basic_block (MonoCompile *cfg, MonoBasicBlock *bb)
2433 {
2434         MonoInst *ins;
2435         MonoCallInst *call;
2436         guint offset;
2437         guint8 *code = cfg->native_code + cfg->code_len;
2438         MonoInst *last_ins = NULL;
2439         guint last_offset = 0;
2440         int max_len, cpos, src2;
2441
2442         if (cfg->opt & MONO_OPT_PEEPHOLE)
2443                 peephole_pass (cfg, bb);
2444
2445         /* we don't align basic blocks of loops on s390 */
2446
2447         if (cfg->verbose_level > 2)
2448                 g_print ("Basic block %d starting at offset 0x%x\n", bb->block_num, bb->native_offset);
2449
2450         cpos = bb->max_offset;
2451
2452         if (cfg->prof_options & MONO_PROFILE_COVERAGE) {
2453                 //MonoCoverageInfo *cov = mono_get_coverage_info (cfg->method);
2454                 //g_assert (!mono_compile_aot);
2455                 //cpos += 6;
2456                 //if (bb->cil_code)
2457                 //      cov->data [bb->dfn].iloffset = bb->cil_code - cfg->cil_code;
2458                 /* this is not thread save, but good enough */
2459                 /* fixme: howto handle overflows? */
2460                 //x86_inc_mem (code, &cov->data [bb->dfn].count);
2461         }
2462
2463         ins = bb->code;
2464         while (ins) {
2465                 offset = code - cfg->native_code;
2466
2467                 max_len = ((guint8 *)ins_get_spec (ins->opcode))[MONO_INST_LEN];
2468
2469                 if (offset > (cfg->code_size - max_len - 16)) {
2470                         cfg->code_size *= 2;
2471                         cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
2472                         code = cfg->native_code + offset;
2473                 }
2474
2475                 mono_debug_record_line_number (cfg, ins, offset);
2476
2477                 switch (ins->opcode) {
2478                 case OP_STOREI1_MEMBASE_IMM: {
2479                         s390_lhi (code, s390_r0, ins->inst_imm);
2480                         if (s390_is_uimm12(ins->inst_offset))
2481                                 s390_stc (code, s390_r0, 0, ins->inst_destbasereg, ins->inst_offset);
2482                         else {
2483                                 s390_basr (code, s390_r13, 0);
2484                                 s390_j    (code, 4);
2485                                 s390_word (code, ins->inst_offset);
2486                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2487                                 s390_stc  (code, s390_r0, s390_r13, ins->inst_destbasereg, 0);
2488                         }
2489                 }
2490                         break;
2491                 case OP_STOREI2_MEMBASE_IMM: {
2492                         s390_lhi (code, s390_r0, ins->inst_imm);
2493                         if (s390_is_uimm12(ins->inst_offset)) {
2494                                 s390_sth (code, s390_r0, 0, ins->inst_destbasereg, ins->inst_offset);
2495                         } else {
2496                                 s390_basr (code, s390_r13, 0);
2497                                 s390_j    (code, 4);
2498                                 s390_word (code, ins->inst_offset);
2499                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2500                                 s390_sth  (code, s390_r0, s390_r13, ins->inst_destbasereg, 0);
2501                         }
2502                 }
2503                         break;
2504                 case OP_STORE_MEMBASE_IMM:
2505                 case OP_STOREI4_MEMBASE_IMM: {
2506                         if (s390_is_imm16(ins->inst_imm)) {
2507                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2508                         } else {
2509                                 s390_basr (code, s390_r13, 0);
2510                                 s390_j    (code, 4);
2511                                 s390_word (code, ins->inst_imm);
2512                                 s390_l    (code, s390_r0, 0, s390_r13, 4);
2513                         }
2514                         if (s390_is_uimm12(ins->inst_offset)) {
2515                                 s390_st  (code, s390_r0, 0, ins->inst_destbasereg, ins->inst_offset);
2516                         } else {
2517                                 s390_basr (code, s390_r13, 0);
2518                                 s390_j    (code, 4);
2519                                 s390_word (code, ins->inst_offset);
2520                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2521                                 s390_st   (code, s390_r0, s390_r13, ins->inst_destbasereg, 0);
2522                         }
2523                 }
2524                         break;
2525                 case OP_STOREI1_MEMBASE_REG: {
2526                         if (s390_is_uimm12(ins->inst_offset)) {
2527                                 s390_stc  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
2528                         } else {
2529                                 s390_basr (code, s390_r13, 0);
2530                                 s390_j    (code, 4);
2531                                 s390_word (code, ins->inst_offset);
2532                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2533                                 s390_stc  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
2534                         }
2535                 }
2536                         break;
2537                 case OP_STOREI2_MEMBASE_REG: {
2538                         if (s390_is_uimm12(ins->inst_offset)) {
2539                                 s390_sth  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
2540                         } else {
2541                                 s390_basr (code, s390_r13, 0);
2542                                 s390_j    (code, 4);
2543                                 s390_word (code, ins->inst_offset);
2544                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2545                                 s390_sth  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
2546                         }
2547                 }
2548                         break;
2549                 case OP_STORE_MEMBASE_REG:
2550                 case OP_STOREI4_MEMBASE_REG: {
2551                         if (s390_is_uimm12(ins->inst_offset)) {
2552                                 s390_st   (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
2553                         } else {
2554                                 s390_basr (code, s390_r13, 0);
2555                                 s390_j    (code, 4);
2556                                 s390_word (code, ins->inst_offset);
2557                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2558                                 s390_st   (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
2559                         }
2560                 }
2561                         break;
2562                 case CEE_LDIND_I:
2563                 case CEE_LDIND_I4:
2564                 case CEE_LDIND_U4: {
2565                         s390_basr (code, s390_r13, 0);
2566                         s390_j    (code, 4);
2567                         s390_word (code, ins->inst_p0);
2568                         s390_l    (code, s390_r13, 0, s390_r13, 4);
2569                         s390_l    (code, ins->dreg, 0, s390_r13, 0);
2570                 }
2571                         break;
2572                 case OP_LOADU4_MEM:
2573                         g_assert_not_reached ();
2574                         break;
2575                 case OP_LOAD_MEMBASE:
2576                 case OP_LOADI4_MEMBASE:
2577                 case OP_LOADU4_MEMBASE: {
2578                         if (s390_is_uimm12(ins->inst_offset))
2579                                 s390_l    (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
2580                         else {
2581                                 if (s390_is_imm16(ins->inst_offset)) {
2582                                         s390_lhi (code, s390_r13, ins->inst_offset);
2583                                         s390_l   (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
2584                                 } else {
2585                                         s390_basr (code, s390_r13, 0);
2586                                         s390_j    (code, 4);
2587                                         s390_word (code, ins->inst_offset);
2588                                         s390_l    (code, s390_r13, 0, s390_r13, 4);
2589                                         s390_l    (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
2590                                 }
2591                         }
2592                 }
2593                         break;
2594                 case OP_LOADU1_MEMBASE: {
2595                         s390_lhi (code, s390_r0, 0);
2596                         if (s390_is_uimm12(ins->inst_offset))
2597                                 s390_ic   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
2598                         else {
2599                                 s390_basr (code, s390_r13, 0);
2600                                 s390_j    (code, 4);
2601                                 s390_word (code, ins->inst_offset);
2602                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2603                                 s390_ic   (code, s390_r0, s390_r13, ins->inst_basereg, 0);
2604                         }
2605                         s390_lr   (code, ins->dreg, s390_r0);
2606                 }
2607                         break;
2608                 case OP_LOADI1_MEMBASE: {
2609                         s390_lhi (code, s390_r0, 0);
2610                         if (s390_is_uimm12(ins->inst_offset))
2611                                 s390_ic   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
2612                         else {
2613                                 s390_basr (code, s390_r13, 0);
2614                                 s390_j    (code, 4);
2615                                 s390_word (code, ins->inst_offset);
2616                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2617                                 s390_ic   (code, s390_r0, s390_r13, ins->inst_basereg, 0);
2618                         }
2619                         s390_lhi  (code, s390_r13, 0x80);
2620                         s390_nr   (code, s390_r13, s390_r0);
2621                         s390_jz   (code, 5);
2622                         s390_lhi  (code, s390_r13, 0xff00);
2623                         s390_or   (code, s390_r0, s390_r13);
2624                         s390_lr   (code, ins->dreg, s390_r0);
2625                 }
2626                         break;
2627                 case OP_LOADU2_MEMBASE: {
2628                         s390_lhi (code, s390_r0, 0);
2629                         if (s390_is_uimm12(ins->inst_offset))
2630                                 s390_icm  (code, s390_r0, 3, ins->inst_basereg, ins->inst_offset);
2631                         else {
2632                                 s390_basr (code, s390_r13, 0);
2633                                 s390_j    (code, 4);
2634                                 s390_word (code, ins->inst_offset);
2635                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2636                                 s390_ar   (code, s390_r13, ins->inst_basereg);
2637                                 s390_icm  (code, s390_r0, 3, s390_r13, 0);
2638                         }
2639                         s390_lr  (code, ins->dreg, s390_r0);
2640                 }
2641                         break;
2642                 case OP_LOADI2_MEMBASE: {
2643                         s390_lhi (code, s390_r0, 0);
2644                         if (s390_is_uimm12(ins->inst_offset))
2645                                 s390_lh   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
2646                         else {
2647                                 s390_basr (code, s390_r13, 0);
2648                                 s390_j    (code, 4);
2649                                 s390_word (code, ins->inst_offset);
2650                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2651                                 s390_lh   (code, s390_r0, s390_r13, ins->inst_basereg, 0);
2652                         }
2653                         s390_lr  (code, ins->dreg, s390_r0);
2654                 }
2655                         break;
2656                 case CEE_CONV_I1: {
2657                         s390_lhi  (code, s390_r0, 0x80);
2658                         if (ins->dreg != ins->sreg1) {
2659                                 s390_lr   (code, ins->dreg, ins->sreg1);
2660                         }
2661                         s390_nr   (code, s390_r0, ins->sreg1);
2662                         s390_jz   (code, 7);
2663                         s390_lhi  (code, s390_r13, -1);
2664                         s390_sll  (code, s390_r13, 0, 8);
2665                         s390_or   (code, ins->dreg, s390_r13);
2666                 }
2667                         break;
2668                 case CEE_CONV_I2: {
2669                         s390_lhi  (code, s390_r0, 0x80);
2670                         s390_sll  (code, s390_r0, 0, 8);
2671                         if (ins->dreg != ins->sreg1) {
2672                                 s390_lr   (code, ins->dreg, ins->sreg1);
2673                         }
2674                         s390_nr   (code, s390_r0, ins->sreg1);
2675                         s390_jz   (code, 7);
2676                         s390_lhi  (code, s390_r13, -1);
2677                         s390_sll  (code, s390_r13, 0, 16);
2678                         s390_or   (code, ins->dreg, s390_r13);
2679                 }
2680                         break;
2681                 case CEE_CONV_U1: {
2682                         s390_lhi  (code, s390_r0, 0xff);
2683                         if (ins->dreg != ins->sreg1) {
2684                                 s390_lr   (code, ins->dreg, ins->sreg1);
2685                         }
2686                         s390_nr   (code, ins->dreg, s390_r0);
2687                 }
2688                         break;
2689                 case CEE_CONV_U2: {
2690                         s390_lhi  (code, s390_r0, -1);
2691                         s390_sll  (code, s390_r0, 0, 16);
2692                         s390_srl  (code, s390_r0, 0, 16);
2693                         if (ins->dreg != ins->sreg1) {
2694                                 s390_lr   (code, ins->dreg, ins->sreg1);
2695                         }
2696                         s390_nr   (code, ins->dreg, s390_r0);
2697                 }
2698                         break;
2699                 case OP_COMPARE: {
2700                         if ((ins->next) &&
2701                             (((ins->next->opcode >= CEE_BNE_UN) &&
2702                               (ins->next->opcode <= CEE_BLT_UN)) ||
2703                              ((ins->next->opcode >= OP_COND_EXC_NE_UN) &&
2704                               (ins->next->opcode <= OP_COND_EXC_LT_UN)) ||
2705                              ((ins->next->opcode == OP_CLT_UN) ||
2706                               (ins->next->opcode == OP_CGT_UN))))
2707                                 s390_clr  (code, ins->sreg1, ins->sreg2);
2708                         else
2709                                 s390_cr   (code, ins->sreg1, ins->sreg2);
2710                 }
2711                         break;
2712                 case OP_COMPARE_IMM: {
2713                         if (s390_is_imm16 (ins->inst_imm)) {
2714                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2715                                 if ((ins->next) &&
2716                                     (((ins->next->opcode >= CEE_BNE_UN) &&
2717                                       (ins->next->opcode <= CEE_BLT_UN)) ||
2718                                      ((ins->next->opcode >= OP_COND_EXC_NE_UN) &&
2719                                       (ins->next->opcode <= OP_COND_EXC_LT_UN)) ||
2720                                      ((ins->next->opcode == OP_CLT_UN) ||
2721                                       (ins->next->opcode == OP_CGT_UN))))
2722                                         s390_clr  (code, ins->sreg1, s390_r0);
2723                                 else
2724                                         s390_cr   (code, ins->sreg1, s390_r0);
2725                         }
2726                         else {
2727                                 s390_basr (code, s390_r13, 0);
2728                                 s390_j    (code, 4);
2729                                 s390_word (code, ins->inst_imm);
2730                                 if ((ins->next) &&
2731                                     (((ins->next->opcode >= CEE_BNE_UN) &&
2732                                       (ins->next->opcode <= CEE_BLT_UN)) ||
2733                                      ((ins->next->opcode >= OP_COND_EXC_NE_UN) &&
2734                                       (ins->next->opcode <= OP_COND_EXC_LT_UN)) ||
2735                                      ((ins->next->opcode == OP_CLT_UN) ||
2736                                       (ins->next->opcode == OP_CGT_UN))))
2737                                         s390_cl   (code, ins->sreg1, 0, s390_r13, 4);
2738                                 else
2739                                         s390_c    (code, ins->sreg1, 0, s390_r13, 4);
2740                         }
2741                 }
2742                         break;
2743                 case OP_BREAK: {
2744                         mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS, mono_arch_break);
2745                         s390_brasl (code, s390_r14, 0);
2746                 }
2747                         break;
2748                 case OP_ADDCC: {
2749                         CHECK_SRCDST_COM;
2750                         s390_alr  (code, ins->dreg, src2);
2751                 }
2752                         break;
2753                 case CEE_ADD: {
2754                         CHECK_SRCDST_COM;
2755                         s390_ar   (code, ins->dreg, src2);
2756                 }
2757                         break;
2758                 case OP_ADC: {
2759                         CHECK_SRCDST_COM;
2760                         s390_alcr (code, ins->dreg, src2);
2761                 }
2762                         break;
2763                 case OP_ADD_IMM: {
2764                         if (ins->dreg != ins->sreg1) {
2765                                 s390_lr   (code, ins->dreg, ins->sreg1);
2766                         }
2767                         if ((ins->next) &&
2768                             (ins->next->opcode == OP_ADC_IMM)) {
2769                                 s390_basr (code, s390_r13, 0);
2770                                 s390_j    (code, 4);
2771                                 s390_word (code, ins->inst_imm);
2772                                 s390_a (code, ins->dreg, 0, s390_r13, 4);
2773                         } else {
2774                                 if (s390_is_imm16 (ins->inst_imm)) {
2775                                         s390_ahi  (code, ins->dreg, ins->inst_imm);
2776                                 } else {
2777                                         s390_basr (code, s390_r13, 0);
2778                                         s390_j    (code, 4);
2779                                         s390_word (code, ins->inst_imm);
2780                                         s390_a (code, ins->dreg, 0, s390_r13, 4);
2781                                 }
2782                         }
2783                 }
2784                         break;
2785                 case OP_ADDCC_IMM: {
2786                         if ((ins->next) &&
2787                             (ins->next->opcode == OP_ADC_IMM)) {
2788                                 s390_basr (code, s390_r13, 0);
2789                                 s390_j    (code, 4);
2790                                 s390_word (code, ins->inst_imm);
2791                                 if (ins->dreg != ins->sreg1) {
2792                                         s390_lr   (code, ins->dreg, ins->sreg1);
2793                                 }
2794                                 s390_al   (code, ins->dreg, 0, s390_r13, 4);
2795                         } else {
2796                                 if (s390_is_imm16 (ins->inst_imm)) {
2797                                         if (ins->dreg != ins->sreg1) {
2798                                                 s390_lr   (code, ins->dreg, ins->sreg1);
2799                                         }
2800                                         s390_lhi  (code, s390_r0, ins->inst_imm);
2801                                         s390_alcr (code, ins->dreg, s390_r0);
2802                                 } else {
2803                                         s390_basr (code, s390_r13, 0);
2804                                         s390_j    (code, 4);
2805                                         s390_word (code, ins->inst_imm);
2806                                         if (ins->dreg != ins->sreg1) {
2807                                                 s390_lr   (code, ins->dreg, ins->sreg1);
2808                                         }
2809                                         s390_al   (code, ins->dreg, 0, s390_r13, 4);
2810                                 }
2811                         }
2812                 }
2813                         break;
2814                 case OP_ADC_IMM: {
2815                         if (s390_is_imm16 (ins->inst_imm)) {
2816                                 if (ins->dreg != ins->sreg1) {
2817                                         s390_lr   (code, ins->dreg, ins->sreg1);
2818                                 }
2819                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2820                                 s390_alcr (code, ins->dreg, s390_r0);
2821                         } else {
2822                                 s390_basr (code, s390_r13, 0);
2823                                 s390_j    (code, 4);
2824                                 s390_word (code, ins->inst_imm);
2825                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2826                                 s390_alcr (code, ins->dreg, s390_r13);
2827                         }
2828                 }
2829                         break;
2830                 case CEE_ADD_OVF: {
2831                         CHECK_SRCDST_COM;
2832                         s390_ar   (code, ins->dreg, src2);
2833                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2834                 }
2835                         break;
2836                 case CEE_ADD_OVF_UN: {
2837                         CHECK_SRCDST_COM;
2838                         s390_alr  (code, ins->dreg, src2);
2839                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
2840                 }
2841                         break;
2842                 case OP_LADD: {
2843                         s390_alr  (code, s390_r0, ins->sreg1);
2844                         s390_jnc  (code, 4);
2845                         s390_ahi  (code, s390_r1, 1);
2846                         s390_ar   (code, s390_r1, ins->sreg2);
2847                         s390_lr   (code, ins->dreg, s390_r0);
2848                         s390_lr   (code, ins->dreg+1, s390_r1);
2849                 }
2850                         break;
2851                 case OP_LADD_OVF: {
2852                         short int *o[1];
2853                         s390_alr  (code, s390_r0, ins->sreg1);
2854                         s390_jnc  (code, 0); CODEPTR(code, o[0]);
2855                         s390_ahi  (code, s390_r1, 1);
2856                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2857                         PTRSLOT   (code, o[0]);
2858                         s390_ar   (code, s390_r1, ins->sreg2);
2859                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2860                         s390_lr   (code, ins->dreg, s390_r0);
2861                         s390_lr   (code, ins->dreg+1, s390_r1);
2862                 }
2863                         break;
2864                 case OP_LADD_OVF_UN: {
2865                         s390_alr  (code, s390_r0, ins->sreg1);
2866                         s390_alcr (code, s390_r1, ins->sreg2);
2867                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
2868                         s390_lr   (code, ins->dreg, s390_r0);
2869                         s390_lr   (code, ins->dreg+1, s390_r1);
2870                 }
2871                         break;
2872                 case OP_ADD_OVF_CARRY: {
2873                         CHECK_SRCDST_COM;
2874                         s390_lhi  (code, s390_r0, 0);
2875                         s390_lr   (code, s390_r1, s390_r0);
2876                         s390_alcr (code, s390_r0, s390_r1);
2877                         s390_ar   (code, ins->dreg, src2);
2878                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2879                         s390_ar   (code, ins->dreg, s390_r0);
2880                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2881                 }
2882                         break;
2883                 case OP_ADD_OVF_UN_CARRY: {
2884                         CHECK_SRCDST_COM;
2885                         s390_alcr (code, ins->dreg, src2);
2886                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
2887                 }
2888                         break;
2889                 case OP_SUBCC: {
2890                         CHECK_SRCDST_NCOM;
2891                         s390_slr (code, ins->dreg, src2);
2892                 }
2893                         break;
2894                 case CEE_SUB: {
2895                         CHECK_SRCDST_NCOM;
2896                         s390_sr   (code, ins->dreg, src2);
2897                 }
2898                         break;
2899                 case OP_SBB: {
2900                         CHECK_SRCDST_NCOM;
2901                         s390_slbr (code, ins->dreg, src2);
2902                 }
2903                         break;
2904                 case OP_SUBCC_IMM: {
2905                         if (s390_is_imm16 (-ins->inst_imm)) {
2906                                 if (ins->dreg != ins->sreg1) {
2907                                         s390_lr   (code, ins->dreg, ins->sreg1);
2908                                 }
2909                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2910                                 s390_slr  (code, ins->dreg, s390_r0);
2911                         } else {
2912                                 s390_basr (code, s390_r13, 0);
2913                                 s390_j    (code, 4);
2914                                 s390_word (code, ins->inst_imm);
2915                                 if (ins->dreg != ins->sreg1) {
2916                                         s390_lr   (code, ins->dreg, ins->sreg1);
2917                                 }
2918                                 s390_sl   (code, ins->dreg, 0, s390_r13, 4);
2919                         }
2920                 }
2921                         break;
2922                 case OP_SUB_IMM: {
2923                         if (s390_is_imm16 (-ins->inst_imm)) {
2924                                 if (ins->dreg != ins->sreg1) {
2925                                         s390_lr   (code, ins->dreg, ins->sreg1);
2926                                 }
2927                                 s390_ahi  (code, ins->dreg, -ins->inst_imm);
2928                         } else {
2929                                 s390_basr (code, s390_r13, 0);
2930                                 s390_j    (code, 4);
2931                                 s390_word (code, ins->inst_imm);
2932                                 if (ins->dreg != ins->sreg1) {
2933                                         s390_lr   (code, ins->dreg, ins->sreg1);
2934                                 }
2935                                 s390_s    (code, ins->dreg, 0, s390_r13, 4);
2936                         }
2937                 }
2938                         break;
2939                 case OP_SBB_IMM: {
2940                         if (ins->dreg != ins->sreg1) {
2941                                 s390_lr    (code, ins->dreg, ins->sreg1);
2942                         }
2943                         if (s390_is_imm16 (-ins->inst_imm)) {
2944                                 s390_lhi   (code, s390_r0, ins->inst_imm);
2945                                 s390_slbr  (code, ins->dreg, s390_r0);
2946                         } else {
2947                                 s390_basr (code, s390_r13, 0);
2948                                 s390_j    (code, 4);
2949                                 s390_word (code, ins->inst_imm);
2950                                 s390_slb  (code, ins->dreg, 0, s390_r13, 4);
2951                         }
2952                 }
2953                         break;
2954                 case CEE_SUB_OVF: {
2955                         CHECK_SRCDST_NCOM;
2956                         s390_sr   (code, ins->dreg, src2);
2957                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2958                 }
2959                         break;
2960                 case CEE_SUB_OVF_UN: {
2961                         CHECK_SRCDST_NCOM;
2962                         s390_slr  (code, ins->dreg, src2);
2963                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
2964                 }
2965                         break;
2966                 case OP_LSUB: {
2967                         s390_lr   (code, s390_r14, ins->sreg2);
2968                         s390_slr  (code, s390_r0, ins->sreg1);
2969                         s390_jnl  (code, 4);
2970                         s390_ahi  (code, s390_r14, 1);
2971                         s390_sr   (code, s390_r1, s390_r14);
2972                         s390_lr   (code, ins->dreg, s390_r0);
2973                         s390_lr   (code, ins->dreg+1, s390_r1);
2974                 }
2975                         break;
2976                 case OP_LSUB_OVF: {
2977                         short int *o[1];
2978                         s390_lr   (code, s390_r14, ins->sreg2);
2979                         s390_slr  (code, s390_r0, ins->sreg1);
2980                         s390_jnl  (code, 0); CODEPTR(code, o[0]);
2981                         s390_ahi  (code, s390_r14, 1);
2982                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2983                         PTRSLOT   (code, o[0]);
2984                         s390_sr   (code, s390_r1, s390_r14);
2985                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2986                         s390_lr   (code, ins->dreg, s390_r0);
2987                         s390_lr   (code, ins->dreg+1, s390_r1);
2988                 }
2989                         break;
2990                 case OP_LSUB_OVF_UN: {
2991                         s390_slr  (code, s390_r0, ins->sreg1);
2992                         s390_slbr (code, s390_r1, ins->sreg2);
2993                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, "OverflowException");
2994                         s390_lr   (code, ins->dreg, s390_r0);
2995                         s390_lr   (code, ins->dreg+1, s390_r1);
2996                 }
2997                         break;
2998                 case OP_SUB_OVF_CARRY: {
2999                         CHECK_SRCDST_NCOM;
3000                         s390_lhi  (code, s390_r0, 0);
3001                         s390_lr   (code, s390_r1, s390_r0);
3002                         s390_slbr (code, s390_r0, s390_r1);
3003                         s390_sr   (code, ins->dreg, src2);
3004                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3005                         s390_ar   (code, ins->dreg, s390_r0);
3006                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3007                 }
3008                         break;
3009                 case OP_SUB_OVF_UN_CARRY: {
3010                         CHECK_SRCDST_NCOM;
3011                         s390_slbr (code, ins->dreg, src2);
3012                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
3013                 }
3014                         break;
3015                 case CEE_AND: {
3016                         if (ins->sreg1 == ins->dreg) {
3017                                 s390_nr   (code, ins->dreg, ins->sreg2);
3018                         }
3019                         else {
3020                                 if (ins->sreg2 == ins->dreg) {
3021                                         s390_nr  (code, ins->dreg, ins->sreg1);
3022                                 }
3023                                 else {
3024                                         s390_lr  (code, ins->dreg, ins->sreg1);
3025                                         s390_nr  (code, ins->dreg, ins->sreg2);
3026                                 }
3027                         }
3028                 }
3029                         break;
3030                 case OP_AND_IMM: {
3031                         if (s390_is_imm16 (ins->inst_imm)) {
3032                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3033                                 if (ins->dreg != ins->sreg1) {
3034                                         s390_lr   (code, ins->dreg, ins->sreg1);
3035                                 }
3036                                 s390_nr   (code, ins->dreg, s390_r0);
3037                         } else {
3038                                 s390_basr (code, s390_r13, 0);
3039                                 s390_j    (code, 4);
3040                                 s390_word (code, ins->inst_imm);
3041                                 if (ins->dreg != ins->sreg1) {
3042                                         s390_lr   (code, ins->dreg, ins->sreg1);
3043                                 }
3044                                 s390_n    (code, ins->dreg, 0, s390_r13, 4);
3045                         }
3046                 }
3047                         break;
3048                 case CEE_DIV: {
3049                         s390_lr   (code, s390_r0, ins->sreg1);
3050                         s390_srda (code, s390_r0, 0, 32);
3051                         s390_dr   (code, s390_r0, ins->sreg2);
3052                         s390_lr   (code, ins->dreg, s390_r1);
3053                 }
3054                         break;
3055                 case CEE_DIV_UN: {
3056                         s390_lr   (code, s390_r0, ins->sreg1);
3057                         s390_srdl (code, s390_r0, 0, 32);
3058                         s390_dlr  (code, s390_r0, ins->sreg2);
3059                         s390_lr   (code, ins->dreg, s390_r1);
3060                 }
3061                         break;
3062                 case OP_DIV_IMM: {
3063                         if (s390_is_imm16 (ins->inst_imm)) {
3064                                 s390_lhi  (code, s390_r13, ins->inst_imm);
3065                                 s390_lr   (code, s390_r0, ins->sreg1);
3066                         } else {
3067                                 s390_basr (code, s390_r13, 0);
3068                                 s390_j    (code, 4);
3069                                 s390_word (code, ins->inst_imm);
3070                                 s390_lr   (code, s390_r0, ins->sreg1);
3071                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3072                         }
3073                         s390_srda (code, s390_r0, 0, 32);
3074                         s390_dr   (code, s390_r0, s390_r13);
3075                         s390_lr   (code, ins->dreg, s390_r1);
3076                 }
3077                         break;
3078                 case CEE_REM: {
3079                         s390_lr   (code, s390_r0, ins->sreg1);
3080                         s390_srda (code, s390_r0, 0, 32);
3081                         s390_dr   (code, s390_r0, ins->sreg2);
3082                         s390_lr   (code, ins->dreg, s390_r0);
3083                         break;
3084                 case CEE_REM_UN:
3085                         s390_lr   (code, s390_r0, ins->sreg1);
3086                         s390_srdl (code, s390_r0, 0, 32);
3087                         s390_dlr  (code, s390_r0, ins->sreg2);
3088                         s390_lr   (code, ins->dreg, s390_r0);
3089                 }
3090                         break;
3091                 case OP_REM_IMM: {
3092                         if (s390_is_imm16 (ins->inst_imm)) {
3093                                 s390_lhi  (code, s390_r13, ins->inst_imm);
3094                                 s390_lr   (code, s390_r0, ins->sreg1);
3095                         } else {
3096                                 s390_basr (code, s390_r13, 0);
3097                                 s390_j    (code, 4);
3098                                 s390_word (code, ins->inst_imm);
3099                                 s390_lr   (code, s390_r0, ins->sreg1);
3100                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3101                         }
3102                         s390_srda (code, s390_r0, 0, 32);
3103                         s390_dr   (code, s390_r0, s390_r13);
3104                         s390_lr   (code, ins->dreg, s390_r0);
3105                 }
3106                         break;
3107                 case CEE_OR: {
3108                         if (ins->sreg1 == ins->dreg) {
3109                                 s390_or   (code, ins->dreg, ins->sreg2);
3110                         }
3111                         else {
3112                                 if (ins->sreg2 == ins->dreg) {
3113                                         s390_or  (code, ins->dreg, ins->sreg1);
3114                                 }
3115                                 else {
3116                                         s390_lr  (code, ins->dreg, ins->sreg1);
3117                                         s390_or  (code, ins->dreg, ins->sreg2);
3118                                 }
3119                         }
3120                 }
3121                         break;
3122                 case OP_OR_IMM: {
3123                         if (s390_is_imm16 (ins->inst_imm)) {
3124                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3125                                 if (ins->dreg != ins->sreg1) {
3126                                         s390_lr   (code, ins->dreg, ins->sreg1);
3127                                 }
3128                                 s390_or   (code, ins->dreg, s390_r0);
3129                         } else {
3130                                 s390_basr (code, s390_r13, 0);
3131                                 s390_j    (code, 4);
3132                                 s390_word (code, ins->inst_imm);
3133                                 if (ins->dreg != ins->sreg1) {
3134                                         s390_lr   (code, ins->dreg, ins->sreg1);
3135                                 }
3136                                 s390_o    (code, ins->dreg, 0, s390_r13, 4);
3137                         }
3138                 }
3139                         break;
3140                 case CEE_XOR: {
3141                         if (ins->sreg1 == ins->dreg) {
3142                                 s390_xr   (code, ins->dreg, ins->sreg2);
3143                         }
3144                         else {
3145                                 if (ins->sreg2 == ins->dreg) {
3146                                         s390_xr  (code, ins->dreg, ins->sreg1);
3147                                 }
3148                                 else {
3149                                         s390_lr  (code, ins->dreg, ins->sreg1);
3150                                         s390_xr  (code, ins->dreg, ins->sreg2);
3151                                 }
3152                         }
3153                 }
3154                         break;
3155                 case OP_XOR_IMM: {
3156                         if (s390_is_imm16 (ins->inst_imm)) {
3157                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3158                                 if (ins->dreg != ins->sreg1) {
3159                                         s390_lr   (code, ins->dreg, ins->sreg1);
3160                                 }
3161                                 s390_xr   (code, ins->dreg, s390_r0);
3162                         } else {
3163                                 s390_basr (code, s390_r13, 0);
3164                                 s390_j    (code, 4);
3165                                 s390_word (code, ins->inst_imm);
3166                                 if (ins->dreg != ins->sreg1) {
3167                                         s390_lr   (code, ins->dreg, ins->sreg1);
3168                                 }
3169                                 s390_x    (code, ins->dreg, 0, s390_r13, 4);
3170                         }
3171                 }
3172                         break;
3173                 case CEE_SHL: {
3174                         CHECK_SRCDST_NCOM;
3175                         s390_sll  (code, ins->dreg, src2, 0);
3176                 }
3177                         break;
3178                 case OP_SHL_IMM: {
3179                         if (ins->sreg1 != ins->dreg) {
3180                                 s390_lr   (code, ins->dreg, ins->sreg1);
3181                         }
3182                         s390_sll  (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3183                 }
3184                         break;
3185                 case CEE_SHR: {
3186                         CHECK_SRCDST_NCOM;
3187                         s390_sra  (code, ins->dreg, src2, 0);
3188                 }
3189                         break;
3190                 case OP_SHR_IMM: {
3191                         if (ins->sreg1 != ins->dreg) {
3192                                 s390_lr   (code, ins->dreg, ins->sreg1);
3193                         }
3194                         s390_sra  (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3195                 }
3196                         break;
3197                 case OP_SHR_UN_IMM: {
3198                         if (ins->sreg1 != ins->dreg) {
3199                                 s390_lr   (code, ins->dreg, ins->sreg1);
3200                         }
3201                         s390_srl  (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3202                 }
3203                         break;
3204                 case CEE_SHR_UN: {
3205                         CHECK_SRCDST_NCOM;
3206                         s390_srl  (code, ins->dreg, src2, 0);
3207                 }
3208                         break;
3209                 case CEE_NOT: {
3210                         if (ins->sreg1 != ins->dreg) {
3211                                 s390_lr   (code, ins->dreg, ins->sreg1);
3212                         }
3213                         s390_lhi (code, s390_r0, -1);
3214                         s390_xr  (code, ins->dreg, s390_r0);
3215                 }
3216                         break;
3217                 case CEE_NEG: {
3218                         s390_lcr (code, ins->dreg, ins->sreg1);
3219                 }
3220                         break;
3221                 case CEE_MUL: {
3222                         if (ins->sreg1 == ins->dreg) {
3223                                 s390_msr  (code, ins->dreg, ins->sreg2);
3224                         }
3225                         else {
3226                                 if (ins->sreg2 == ins->dreg) {
3227                                         s390_msr (code, ins->dreg, ins->sreg1);
3228                                 }
3229                                 else {
3230                                         s390_lr  (code, ins->dreg, ins->sreg1);
3231                                         s390_msr (code, ins->dreg, ins->sreg2);
3232                                 }
3233                         }
3234                 }
3235                         break;
3236                 case OP_MUL_IMM: {
3237                         if (s390_is_imm16 (ins->inst_imm)) {
3238                                 s390_lhi  (code, s390_r13, ins->inst_imm);
3239                         } else {
3240                                 s390_basr (code, s390_r13, 0);
3241                                 s390_j    (code, 4);
3242                                 s390_word (code, ins->inst_imm);
3243 //                              if (ins->dreg != ins->sreg1) {
3244 //                                      s390_lr   (code, ins->dreg, ins->sreg1);
3245 //                              }
3246                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3247                         }
3248                         if (ins->dreg != ins->sreg1) {
3249                                 s390_lr   (code, ins->dreg, ins->sreg1);
3250                         }
3251                         s390_msr  (code, ins->dreg, s390_r13);
3252                 }
3253                         break;
3254                 case CEE_MUL_OVF: {
3255                         short int *o[2];
3256                         s390_ltr  (code, s390_r1, ins->sreg1);
3257                         s390_jz   (code, 0); CODEPTR(code, o[0]);
3258                         s390_ltr  (code, s390_r0, ins->sreg2);
3259                         s390_jnz  (code, 6);
3260                         s390_lhi  (code, s390_r1, 0);
3261                         s390_j    (code, 0); CODEPTR(code, o[1]);
3262                         s390_xr   (code, s390_r0, s390_r1);
3263                         s390_msr  (code, s390_r1, ins->sreg2);
3264                         s390_xr   (code, s390_r0, s390_r1);
3265                         s390_srl  (code, s390_r0, 0, 31);
3266                         s390_ltr  (code, s390_r0, s390_r0);
3267                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3268                         PTRSLOT   (code, o[0]);
3269                         PTRSLOT   (code, o[1]);
3270                         s390_lr   (code, ins->dreg, s390_r1);
3271                 }
3272                         break;
3273                 case CEE_MUL_OVF_UN: {
3274                         s390_lhi  (code, s390_r0, 0);
3275                         s390_lr   (code, s390_r1, ins->sreg1);
3276                         s390_mlr  (code, s390_r0, ins->sreg2);
3277                         s390_ltr  (code, s390_r0, s390_r0);
3278                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3279                         s390_lr   (code, ins->dreg, s390_r1);
3280                 }
3281                         break;
3282                 case OP_LMUL: {
3283                         s390_l    (code, s390_r0, 0, ins->sreg1, 4);
3284                         s390_srda (code, s390_r0, 0, 32);
3285                         s390_m    (code, s390_r0, 0, ins->sreg2, 4);
3286                         s390_l    (code, s390_r0, 0, ins->sreg1, 4);
3287                         s390_srl  (code, s390_r0, 0, 31);
3288                         s390_a    (code, s390_r0, 0, ins->sreg1, 0);
3289                         s390_l    (code, s390_r13, 0, ins->sreg2, 0);
3290                         s390_srl  (code, s390_r13, 0, 31);
3291                         s390_ms   (code, s390_r13, 0, ins->sreg1, 4);
3292                         s390_ar   (code, s390_r0, s390_r13);
3293                         s390_st   (code, s390_r0, 0, ins->dreg, 0);
3294                         s390_st   (code, s390_r1, 0, ins->dreg, 4);
3295                 }
3296                         break;
3297                 case OP_ICONST:
3298                 case OP_SETREGIMM: {
3299                         if (s390_is_imm16(ins->inst_c0)) {
3300                                 s390_lhi  (code, ins->dreg, ins->inst_c0);
3301                         } else {
3302                                 s390_basr (code, s390_r13, 0);
3303                                 s390_j    (code, 4);
3304                                 s390_word (code, ins->inst_c0);
3305                                 s390_l    (code, ins->dreg, 0, s390_r13, 4);
3306                         }
3307                 }
3308                         break;
3309                 case OP_AOTCONST: {
3310                         s390_basr (code, s390_r13, 0);
3311                         s390_j    (code, 4);
3312                         mono_add_patch_info (cfg, code - cfg->native_code,
3313                                 (MonoJumpInfoType)ins->inst_i1, ins->inst_p0);
3314                         s390_word (code, 0);
3315                         s390_l    (code,ins->dreg, 0, s390_r13, 4);
3316                 }
3317                         break;
3318                 case CEE_CONV_I4:
3319                 case CEE_CONV_U4:
3320                 case OP_MOVE:
3321                 case OP_SETREG: {
3322                         if (ins->dreg != ins->sreg1) {
3323                                 s390_lr (code, ins->dreg, ins->sreg1);
3324                         }
3325                 }
3326                         break;
3327                 case OP_SETLRET: {
3328                         int saved = ins->sreg1;
3329                         if (ins->sreg1 == s390_r2) {
3330                                 s390_lr (code, s390_r0, ins->sreg1);
3331                                 saved = s390_r0;
3332                         }
3333                         if (ins->sreg2 != s390_r2)
3334                                 s390_lr (code, s390_r2, ins->sreg2);
3335                         if (saved != s390_r3)
3336                                 s390_lr (code, s390_r3, saved);
3337                         break;
3338                 }
3339                 case OP_SETFREG:
3340                 case OP_FMOVE: {
3341                         if (ins->dreg != ins->sreg1) {
3342                                 s390_ldr   (code, ins->dreg, ins->sreg1);
3343                         }
3344                 }
3345                         break;
3346                 case OP_S390_SETF4RET: {
3347                         s390_ledbr (code, ins->dreg, ins->sreg1);
3348                 }
3349                         break;
3350                 case OP_TLS_GET: {
3351                         if (s390_is_imm16 (ins->inst_offset)) {
3352                                 s390_lhi (code, s390_r13, ins->inst_offset);
3353                         } else {
3354                                 s390_bras (code, s390_r13, 0);
3355                                 s390_j    (code, 4);
3356                                 s390_word (code, ins->inst_offset);
3357                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3358                         }
3359                         s390_ear (code, s390_r1, 0);
3360                         s390_l   (code, ins->dreg, s390_r13, s390_r1, 0);
3361                 }
3362                         break;
3363                 case OP_FCONV_TO_R4: {
3364                         NOT_IMPLEMENTED("OP_FCONV_TO_R4");
3365                         if ((ins->next) &&
3366                              (ins->next->opcode != OP_FMOVE) &&
3367                              (ins->next->opcode != OP_STORER4_MEMBASE_REG))
3368                                 s390_ledbr (code, ins->dreg, ins->sreg1);
3369                 }
3370                         break;
3371                 case OP_JMP: {
3372                         if (cfg->method->save_lmf)
3373                                 restoreLMF(code, cfg->frame_reg, cfg->stack_usage);
3374
3375                         if (cfg->flags & MONO_CFG_HAS_TAIL) {
3376                                 code = emit_load_volatile_registers(code, cfg);
3377                         }
3378
3379                         code = backUpStackPtr(cfg, code, STK_BASE);
3380                         s390_l   (code, s390_r14, 0, STK_BASE, S390_RET_ADDR_OFFSET);
3381                         mono_add_patch_info (cfg, code - cfg->native_code,
3382                                              MONO_PATCH_INFO_METHOD_JUMP,
3383                                              ins->inst_p0);
3384                         s390_jcl (code, S390_CC_UN, 0);
3385                 }
3386                         break;
3387                 case OP_CHECK_THIS: {
3388                         /* ensure ins->sreg1 is not NULL */
3389                         s390_icm (code, s390_r0, 15, ins->sreg1, 0);
3390                 }
3391                         break;
3392                 case OP_ARGLIST: {
3393                         int offset = cfg->sig_cookie + cfg->stack_usage;
3394
3395                         if (s390_is_imm16 (offset))
3396                                 s390_lhi  (code, s390_r0, offset);
3397                         else {
3398                                 s390_basr (code, s390_r13, 0);
3399                                 s390_j    (code, 4);
3400                                 s390_word (code, offset);
3401                                 s390_l    (code, s390_r0, 0, s390_r13, 0);
3402                         }
3403                         s390_ar   (code, s390_r0, cfg->frame_reg);
3404                         s390_st   (code, s390_r0, 0, ins->sreg1, 0);
3405                 }
3406                         break;
3407                 case OP_FCALL: {
3408                         call = (MonoCallInst*)ins;
3409                         if (ins->flags & MONO_INST_HAS_METHOD)
3410                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_METHOD,
3411                                                      call->method);
3412                         else
3413                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS,
3414                                                      call->fptr);
3415                         s390_brasl (code, s390_r14, 0);
3416                         if (call->signature->ret->type == MONO_TYPE_R4)
3417                                 s390_ldebr (code, s390_f0, s390_f0);
3418                 }
3419                         break;
3420                 case OP_LCALL:
3421                 case OP_VCALL:
3422                 case OP_VOIDCALL:
3423                 case CEE_CALL: {
3424                         call = (MonoCallInst*)ins;
3425                         if (ins->flags & MONO_INST_HAS_METHOD)
3426                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_METHOD, call->method);
3427                         else
3428                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS, call->fptr);
3429                         s390_brasl (code, s390_r14, 0);
3430                 }
3431                         break;
3432                 case OP_FCALL_REG: {
3433                         call = (MonoCallInst*)ins;
3434                         s390_lr   (code, s390_r1, ins->sreg1);
3435                         s390_basr (code, s390_r14, s390_r1);
3436                         if (call->signature->ret->type == MONO_TYPE_R4)
3437                                 s390_ldebr (code, s390_f0, s390_f0);
3438                 }
3439                         break;
3440                 case OP_LCALL_REG:
3441                 case OP_VCALL_REG:
3442                 case OP_VOIDCALL_REG:
3443                 case OP_CALL_REG: {
3444                         s390_lr   (code, s390_r1, ins->sreg1);
3445                         s390_basr (code, s390_r14, s390_r1);
3446                 }
3447                         break;
3448                 case OP_FCALL_MEMBASE: {
3449                         call = (MonoCallInst*)ins;
3450                         s390_l    (code, s390_r1, 0, ins->sreg1, ins->inst_offset);
3451                         s390_basr (code, s390_r14, s390_r1);
3452                         if (call->signature->ret->type == MONO_TYPE_R4)
3453                                 s390_ldebr (code, s390_f0, s390_f0);
3454                 }
3455                         break;
3456                 case OP_LCALL_MEMBASE:
3457                 case OP_VCALL_MEMBASE:
3458                 case OP_VOIDCALL_MEMBASE:
3459                 case OP_CALL_MEMBASE: {
3460                         s390_l    (code, s390_r1, 0, ins->sreg1, ins->inst_offset);
3461                         s390_basr (code, s390_r14, s390_r1);
3462                 }
3463                         break;
3464                 case OP_OUTARG:
3465                         g_assert_not_reached ();
3466                         break;
3467                 case OP_LOCALLOC: {
3468                         /*------------------------------------------*/
3469                         /* To allocate space on the stack we have   */
3470                         /* to allow room for parameters passed in   */
3471                         /* calls, the backchain pointer and round   */
3472                         /* it to our stack alignment requirements   */
3473                         /*------------------------------------------*/
3474                         int alloca_skip = S390_MINIMAL_STACK_SIZE + cfg->param_area;
3475                         int area_offset = S390_ALIGN(alloca_skip, S390_STACK_ALIGNMENT);
3476                         s390_lr   (code, s390_r1, ins->sreg1);
3477                         if (ins->flags & MONO_INST_INIT)
3478                                 s390_lr   (code, s390_r0, ins->sreg1);
3479                         s390_ahi  (code, s390_r1, 14);
3480                         s390_srl  (code, s390_r1, 0, 3);
3481                         s390_sll  (code, s390_r1, 0, 3);
3482                         if (cfg->method->save_lmf) {
3483                                 /*----------------------------------*/
3484                                 /* we have to adjust lmf ebp value  */
3485                                 /*----------------------------------*/
3486                                 int lmfOffset = cfg->stack_usage - sizeof(MonoLMF);
3487
3488                                 s390_lr (code, s390_r13, cfg->frame_reg);
3489                                 if (s390_is_uimm16(lmfOffset))
3490                                         s390_ahi   (code, s390_r13, lmfOffset);
3491                                 else {
3492                                         s390_basr (code, s390_r14, 0);
3493                                         s390_j    (code, 4);
3494                                         s390_word (code, lmfOffset);
3495                                         s390_a    (code, s390_r13, 0, s390_r14, 4);
3496                                 }
3497                                 s390_lr (code, s390_r14, STK_BASE);
3498                                 s390_sr (code, s390_r14, s390_r1);
3499                                 s390_st (code, s390_r14, 0, s390_r13,
3500                                          G_STRUCT_OFFSET(MonoLMF, ebp));
3501                         }
3502                         s390_l    (code, s390_r13, 0, STK_BASE, 0);
3503                         s390_sr   (code, STK_BASE, s390_r1);
3504                         s390_st   (code, s390_r13, 0, STK_BASE, 0);
3505                         s390_la   (code, ins->dreg, 0, STK_BASE, area_offset);
3506                         s390_srl  (code, ins->dreg, 0, 3);
3507                         s390_sll  (code, ins->dreg, 0, 3);
3508                         if (ins->flags & MONO_INST_INIT) {
3509                                 s390_lr   (code, s390_r1, s390_r0);
3510                                 s390_lr   (code, s390_r0, ins->dreg);
3511                                 s390_lr   (code, s390_r14, s390_r12);
3512                                 s390_lhi  (code, s390_r13, 0);
3513                                 s390_mvcle(code, s390_r0, s390_r12, 0, 0);
3514                                 s390_jo   (code, -2);
3515                                 s390_lr   (code, s390_r12, s390_r14);
3516                         }
3517                 }
3518                         break;
3519                 case CEE_RET: {
3520                         s390_br  (code, s390_r14);
3521                 }
3522                         break;
3523                 case OP_THROW: {
3524                         s390_lr (code, s390_r2, ins->sreg1);
3525                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD,
3526                                              (gpointer)"mono_arch_throw_exception");
3527                         s390_brasl (code, s390_r14, 0);
3528                 }
3529                         break;
3530                 case OP_RETHROW: {
3531                         s390_lr (code, s390_r2, ins->sreg1);
3532                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD,
3533                                              (gpointer)"mono_arch_rethrow_exception");
3534                         s390_brasl (code, s390_r14, 0);
3535                 }
3536                         break;
3537                 case OP_START_HANDLER: {
3538                         if (s390_is_uimm12 (ins->inst_left->inst_offset)) {
3539                                 s390_st   (code, s390_r14, 0,
3540                                            ins->inst_left->inst_basereg,
3541                                            ins->inst_left->inst_offset);
3542                         } else {
3543                                 s390_basr (code, s390_r13, 0);
3544                                 s390_j    (code, 4);
3545                                 s390_word (code, ins->inst_left->inst_offset);
3546                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3547                                 s390_st   (code, s390_r14, s390_r13,
3548                                            ins->inst_left->inst_basereg, 0);
3549                         }
3550                 }
3551                         break;
3552                 case OP_ENDFILTER: {
3553                         if (ins->sreg1 != s390_r2)
3554                                 s390_lr (code, s390_r2, ins->sreg1);
3555                         if (s390_is_uimm12 (ins->inst_left->inst_offset)) {
3556                                 s390_l  (code, s390_r14, 0, ins->inst_left->inst_basereg,
3557                                          ins->inst_left->inst_offset);
3558                         } else {
3559                                 s390_basr (code, s390_r13, 0);
3560                                 s390_j    (code, 4);
3561                                 s390_word (code, ins->inst_left->inst_offset);
3562                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3563                                 s390_l    (code, s390_r14, s390_r13,
3564                                            ins->inst_left->inst_basereg, 0);
3565                         }
3566                         s390_br  (code, s390_r14);
3567                 }
3568                         break;
3569                 case OP_ENDFINALLY: {
3570                         if (s390_is_uimm12 (ins->inst_left->inst_offset)) {
3571                                 s390_l  (code, s390_r14, 0, ins->inst_left->inst_basereg,
3572                                          ins->inst_left->inst_offset);
3573                         } else {
3574                                 s390_basr (code, s390_r13, 0);
3575                                 s390_j    (code, 4);
3576                                 s390_word (code, ins->inst_left->inst_offset);
3577                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3578                                 s390_l    (code, s390_r14, s390_r13,
3579                                            ins->inst_left->inst_basereg, 0);
3580                         }
3581                         s390_br  (code, s390_r14);
3582                 }
3583                         break;
3584                 case OP_CALL_HANDLER: {
3585                         mono_add_patch_info (cfg, code-cfg->native_code,
3586                                              MONO_PATCH_INFO_BB, ins->inst_target_bb);
3587                         s390_brasl (code, s390_r14, 0);
3588                 }
3589                         break;
3590                 case OP_LABEL: {
3591                         ins->inst_c0 = code - cfg->native_code;
3592                 }
3593                         break;
3594                 case OP_BR:
3595                         EMIT_UNCOND_BRANCH(ins);
3596                         break;
3597                 case OP_BR_REG: {
3598                         s390_br  (code, ins->sreg1);
3599                 }
3600                         break;
3601                 case OP_CEQ: {
3602                         s390_lhi (code, ins->dreg, 1);
3603                         s390_jz  (code, 4);
3604                         s390_lhi (code, ins->dreg, 0);
3605                 }
3606                         break;
3607                 case OP_CLT: {
3608                         s390_lhi (code, ins->dreg, 1);
3609                         s390_jl  (code, 4);
3610                         s390_lhi (code, ins->dreg, 0);
3611                 }
3612                         break;
3613                 case OP_CLT_UN: {
3614                         s390_lhi (code, ins->dreg, 1);
3615                         s390_jlo (code, 4);
3616                         s390_lhi (code, ins->dreg, 0);
3617                 }
3618                         break;
3619                 case OP_CGT: {
3620                         s390_lhi (code, ins->dreg, 1);
3621                         s390_jh  (code, 4);
3622                         s390_lhi (code, ins->dreg, 0);
3623                 }
3624                         break;
3625                 case OP_CGT_UN: {
3626                         s390_lhi (code, ins->dreg, 1);
3627                         s390_jho (code, 4);
3628                         s390_lhi (code, ins->dreg, 0);
3629                 }
3630                         break;
3631                 case OP_COND_EXC_EQ:
3632                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_EQ, ins->inst_p1);
3633                         break;
3634                 case OP_COND_EXC_NE_UN:
3635                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NE, ins->inst_p1);
3636                         break;
3637                 case OP_COND_EXC_LT:
3638                 case OP_COND_EXC_LT_UN:
3639                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, ins->inst_p1);
3640                         break;
3641                 case OP_COND_EXC_GT:
3642                 case OP_COND_EXC_GT_UN:
3643                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GT, ins->inst_p1);
3644                         break;
3645                 case OP_COND_EXC_GE:
3646                 case OP_COND_EXC_GE_UN:
3647                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GE, ins->inst_p1);
3648                         break;
3649                 case OP_COND_EXC_LE:
3650                 case OP_COND_EXC_LE_UN:
3651                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LE, ins->inst_p1);
3652                         break;
3653                 case OP_COND_EXC_OV:
3654                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, ins->inst_p1);
3655                         break;
3656                 case OP_COND_EXC_NO:
3657                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NO, ins->inst_p1);
3658                         break;
3659                 case OP_COND_EXC_C:
3660                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, ins->inst_p1);
3661                         break;
3662                 case OP_COND_EXC_NC:
3663                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, ins->inst_p1);
3664                         break;
3665                 case CEE_BEQ:
3666                         EMIT_COND_BRANCH (ins, S390_CC_EQ);
3667                         break;
3668                 case CEE_BNE_UN:
3669                         EMIT_COND_BRANCH (ins, S390_CC_NE);
3670                         break;
3671                 case CEE_BLT:
3672                 case CEE_BLT_UN:
3673                         EMIT_COND_BRANCH (ins, S390_CC_LT);
3674                         break;
3675                 case CEE_BGT:
3676                 case CEE_BGT_UN:
3677                         EMIT_COND_BRANCH (ins, S390_CC_GT);
3678                         break;
3679                 case CEE_BGE:
3680                 case CEE_BGE_UN:
3681                         EMIT_COND_BRANCH (ins, S390_CC_GE);
3682                         break;
3683                 case CEE_BLE:
3684                 case CEE_BLE_UN:
3685                         EMIT_COND_BRANCH (ins, S390_CC_LE);
3686                         break;
3687
3688                 /* floating point opcodes */
3689                 case OP_R8CONST: {
3690                         if (*((float *) ins->inst_p0) == 0) {
3691                                 s390_lzdr (code, ins->dreg);
3692                         } else {
3693                                 s390_basr  (code, s390_r13, 0);
3694                                 s390_j     (code, 4);
3695                                 s390_word  (code, ins->inst_p0);
3696                                 s390_l     (code, s390_r13, 0, s390_r13, 4);
3697                                 s390_ld    (code, ins->dreg, 0, s390_r13, 0);
3698                         }
3699                 }
3700                         break;
3701                 case OP_R4CONST: {
3702                         if (*((float *) ins->inst_p0) == 0) {
3703                                 s390_lzdr (code, ins->dreg);
3704                         } else {
3705                                 s390_basr (code, s390_r13, 0);
3706                                 s390_j    (code, 4);
3707                                 s390_word (code, ins->inst_p0);
3708                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3709                                 s390_ldeb (code, ins->dreg, 0, s390_r13, 0);
3710                         }
3711                 }
3712                         break;
3713                 case OP_STORER8_MEMBASE_REG: {
3714                         if (s390_is_uimm12(ins->inst_offset)) {
3715                                 s390_std  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
3716                         } else {
3717                                 s390_basr (code, s390_r13, 0);
3718                                 s390_j    (code, 4);
3719                                 s390_word (code, ins->inst_offset);
3720                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3721                                 s390_std  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
3722                         }
3723                 }
3724                         break;
3725                 case OP_LOADR8_MEMBASE: {
3726                         if (s390_is_uimm12(ins->inst_offset)) {
3727                                 s390_ld   (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
3728                         } else {
3729                                 s390_basr (code, s390_r13, 0);
3730                                 s390_j    (code, 4);
3731                                 s390_word (code, ins->inst_offset);
3732                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3733                                 s390_ld   (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
3734                         }
3735                 }
3736                         break;
3737                 case OP_STORER4_MEMBASE_REG: {
3738                         if (s390_is_uimm12(ins->inst_offset)) {
3739                                 s390_ledbr(code, s390_f15, ins->sreg1);
3740                                 s390_ste  (code, s390_f15, 0, ins->inst_destbasereg, ins->inst_offset);
3741                         } else {
3742                                 s390_basr (code, s390_r13, 0);
3743                                 s390_j    (code, 4);
3744                                 s390_word (code, ins->inst_offset);
3745                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3746                                 s390_ledbr(code, s390_f15, ins->sreg1);
3747                                 s390_ste  (code, s390_f15, s390_r13, ins->inst_destbasereg, 0);
3748                         }
3749                 }
3750                         break;
3751                 case OP_LOADR4_MEMBASE: {
3752                         if (s390_is_uimm12(ins->inst_offset)) {
3753                                 s390_ldeb (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
3754                         } else {
3755                                 s390_basr (code, s390_r13, 0);
3756                                 s390_j    (code, 4);
3757                                 s390_word (code, ins->inst_offset);
3758                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3759                                 s390_ldeb (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
3760                         }
3761                 }
3762                         break;
3763                 case CEE_CONV_R_UN: {
3764                         s390_cdfbr (code, ins->dreg, ins->sreg1);
3765                         s390_ltr   (code, ins->sreg1, ins->sreg1);
3766                         s390_jnl   (code, 12);
3767                         s390_basr  (code, s390_r13, 0);
3768                         s390_j     (code, 6);
3769                         s390_word  (code, 0x41f00000);
3770                         s390_word  (code, 0);
3771                         s390_adb   (code, ins->dreg, 0, s390_r13, 4);
3772                 }
3773                         break;
3774                 case CEE_CONV_R4: {
3775                         s390_cdfbr (code, ins->dreg, ins->sreg1);
3776                 }
3777                         break;
3778                 case CEE_CONV_R8: {
3779                         s390_cdfbr (code, ins->dreg, ins->sreg1);
3780                 }
3781                         break;
3782                 case OP_FCONV_TO_I1:
3783                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 1, TRUE);
3784                         break;
3785                 case OP_FCONV_TO_U1:
3786                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 1, FALSE);
3787                         break;
3788                 case OP_FCONV_TO_I2:
3789                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 2, TRUE);
3790                         break;
3791                 case OP_FCONV_TO_U2:
3792                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 2, FALSE);
3793                         break;
3794                 case OP_FCONV_TO_I4:
3795                 case OP_FCONV_TO_I:
3796                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 4, TRUE);
3797                         break;
3798                 case OP_FCONV_TO_U4:
3799                 case OP_FCONV_TO_U:
3800                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 4, FALSE);
3801                         break;
3802                 case OP_FCONV_TO_I8:
3803                 case OP_FCONV_TO_U8:
3804                         g_assert_not_reached ();
3805                         /* Implemented as helper calls */
3806                         break;
3807                 case OP_LCONV_TO_R_UN:
3808                         g_assert_not_reached ();
3809                         /* Implemented as helper calls */
3810                         break;
3811                 case OP_LCONV_TO_OVF_I: {
3812                         /* Valid ints: 0xffffffff:8000000 to 00000000:0x7f000000 */
3813                         short int *o[5];
3814                         s390_ltr  (code, ins->sreg1, ins->sreg1);
3815                         s390_jnl  (code, 0); CODEPTR(code, o[0]);
3816                         s390_ltr  (code, ins->sreg2, ins->sreg2);
3817                         s390_jnl  (code, 0); CODEPTR(code, o[1]);
3818                         s390_lhi  (code, s390_r13, -1);
3819                         s390_cr   (code, ins->sreg2, s390_r13);
3820                         s390_jnz  (code, 0); CODEPTR(code, o[2]);
3821                         if (ins->dreg != ins->sreg1)
3822                                 s390_lr   (code, ins->dreg, ins->sreg1);
3823                         s390_j    (code, 0); CODEPTR(code, o[3]);
3824                         PTRSLOT(code, o[0]);
3825                         s390_ltr  (code, ins->sreg2, ins->sreg2);
3826                         s390_jz   (code, 0); CODEPTR(code, o[4]);
3827                         PTRSLOT(code, o[1]);
3828                         PTRSLOT(code, o[2]);
3829                         mono_add_patch_info (cfg, code - cfg->native_code,
3830                                              MONO_PATCH_INFO_EXC, "OverflowException");
3831                         s390_brasl (code, s390_r14, 0);
3832                         PTRSLOT(code, o[3]);
3833                         PTRSLOT(code, o[4]);
3834                 }
3835                         break;
3836                 case OP_SQRT: {
3837                         s390_sqdbr (code, ins->dreg, ins->sreg1);
3838                 }
3839                         break;
3840                 case OP_FADD: {
3841                         CHECK_SRCDST_COM_F;
3842                         s390_adbr (code, ins->dreg, src2);
3843                 }
3844                         break;
3845                 case OP_FSUB: {
3846                         CHECK_SRCDST_NCOM_F;
3847                         s390_sdbr (code, ins->dreg, src2);
3848                 }
3849                         break;
3850                 case OP_FMUL: {
3851                         CHECK_SRCDST_COM_F;
3852                         s390_mdbr (code, ins->dreg, src2);
3853                 }
3854                         break;
3855                 case OP_FDIV: {
3856                         CHECK_SRCDST_NCOM_F;
3857                         s390_ddbr (code, ins->dreg, src2);
3858                 }
3859                         break;
3860                 case OP_FNEG: {
3861                         s390_lcdbr (code, ins->dreg, ins->sreg1);
3862                 }
3863                         break;
3864                 case OP_FREM: {
3865                         CHECK_SRCDST_NCOM_F;
3866                         s390_didbr (code, ins->dreg, src2, 5, s390_f15);
3867                 }
3868                         break;
3869                 case OP_FCOMPARE: {
3870                         s390_cdbr (code, ins->sreg1, ins->sreg2);
3871                 }
3872                         break;
3873                 case OP_FCEQ: {
3874                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3875                         s390_lhi   (code, ins->dreg, 1);
3876                         s390_je    (code, 4);
3877                         s390_lhi   (code, ins->dreg, 0);
3878                 }
3879                         break;
3880                 case OP_FCLT: {
3881                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3882                         s390_lhi   (code, ins->dreg, 1);
3883                         s390_jl    (code, 4);
3884                         s390_lhi   (code, ins->dreg, 0);
3885                 }
3886                         break;
3887                 case OP_FCLT_UN: {
3888                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3889                         s390_lhi   (code, ins->dreg, 1);
3890                         s390_jlo   (code, 4);
3891                         s390_lhi   (code, ins->dreg, 0);
3892                 }
3893                         break;
3894                 case OP_FCGT: {
3895                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3896                         s390_lhi   (code, ins->dreg, 1);
3897                         s390_jh    (code, 4);
3898                         s390_lhi   (code, ins->dreg, 0);
3899                 }
3900                         break;
3901                 case OP_FCGT_UN: {
3902                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3903                         s390_lhi   (code, ins->dreg, 1);
3904                         s390_jho   (code, 4);
3905                         s390_lhi   (code, ins->dreg, 0);
3906                 }
3907                         break;
3908                 case OP_FBEQ: {
3909                         short *o;
3910                         s390_jo (code, 0); CODEPTR(code, o);
3911                         EMIT_COND_BRANCH (ins, S390_CC_EQ);
3912                         PTRSLOT(code, o);
3913                 }
3914                         break;
3915                 case OP_FBNE_UN:
3916                         EMIT_COND_BRANCH (ins, S390_CC_NE|S390_CC_OV);
3917                         break;
3918                 case OP_FBLT: {
3919                         short *o;
3920                         s390_jo (code, 0); CODEPTR(code, o);
3921                         EMIT_COND_BRANCH (ins, S390_CC_LT);
3922                         PTRSLOT(code, o);
3923                 }
3924                         break;
3925                 case OP_FBLT_UN:
3926                         EMIT_COND_BRANCH (ins, S390_CC_LT|S390_CC_OV);
3927                         break;
3928                 case OP_FBGT: {
3929                         short *o;
3930                         s390_jo (code, 0); CODEPTR(code, o);
3931                         EMIT_COND_BRANCH (ins, S390_CC_GT);
3932                         PTRSLOT(code, o);
3933                 }
3934                         break;
3935                 case OP_FBGT_UN:
3936                         EMIT_COND_BRANCH (ins, S390_CC_GT|S390_CC_OV);
3937                         break;
3938                 case OP_FBGE: {
3939                         short *o;
3940                         s390_jo (code, 0); CODEPTR(code, o);
3941                         EMIT_COND_BRANCH (ins, S390_CC_GE);
3942                         PTRSLOT(code, o);
3943                 }
3944                         break;
3945                 case OP_FBGE_UN:
3946                         EMIT_COND_BRANCH (ins, S390_CC_GE|S390_CC_OV);
3947                         break;
3948                 case OP_FBLE: {
3949                         short *o;
3950                         s390_jo (code, 0); CODEPTR(code, o);
3951                         EMIT_COND_BRANCH (ins, S390_CC_LE);
3952                         PTRSLOT(code, o);
3953                 }
3954                         break;
3955                 case OP_FBLE_UN:
3956                         EMIT_COND_BRANCH (ins, S390_CC_LE|S390_CC_OV);
3957                         break;
3958                 case OP_CKFINITE: {
3959                         short *o;
3960                         s390_lhi  (code, s390_r13, 0x7f);
3961                         s390_tcdb (code, ins->sreg1, 0, s390_r13, 0);
3962                         s390_jz   (code, 0); CODEPTR(code, o);
3963                         mono_add_patch_info (cfg, code - cfg->native_code,
3964                                              MONO_PATCH_INFO_EXC, "ArithmeticException");
3965                         s390_brasl (code, s390_r14,0);
3966                         PTRSLOT(code, o);
3967                 }
3968                         break;
3969                 case OP_S390_MOVE: {
3970                         if (ins->backend.size > 0) {
3971                                 if (ins->backend.size <= 256) {
3972                                         s390_mvc  (code, ins->backend.size, ins->dreg,
3973                                                    ins->inst_offset, ins->sreg1, ins->inst_imm);
3974                                 } else {
3975                                         s390_lr   (code, s390_r0, ins->dreg);
3976                                         if (s390_is_imm16 (ins->inst_offset)) {
3977                                                 s390_ahi  (code, s390_r0, ins->inst_offset);
3978                                         } else {
3979                                                 s390_basr (code, s390_r13, 0);
3980                                                 s390_j    (code, 4);
3981                                                 s390_word (code, ins->inst_offset);
3982                                                 s390_a    (code, s390_r0, 0, s390_r13, 4);
3983                                         }
3984                                         s390_lr   (code, s390_r14, s390_r12);
3985                                         s390_lr   (code, s390_r12, ins->sreg1);
3986                                         if (s390_is_imm16 (ins->inst_imm)) {
3987                                                 s390_ahi  (code, s390_r12, ins->inst_imm);
3988                                         } else {
3989                                                 s390_basr (code, s390_r13, 0);
3990                                                 s390_j    (code, 4);
3991                                                 s390_word (code, ins->inst_imm);
3992                                                 s390_a    (code, s390_r12, 0, s390_r13, 4);
3993                                         }
3994                                         s390_lr   (code, s390_r1, ins->sreg1);
3995                                         s390_lr   (code, s390_r13, s390_r1);
3996                                         s390_mvcle(code, s390_r0, s390_r12, 0, 0);
3997                                         s390_jo   (code, -2);
3998                                         s390_lr   (code, s390_r12, s390_r14);
3999                                 }
4000                         }
4001                 }
4002                         break;
4003                 case OP_ATOMIC_ADD_I4: {
4004                         s390_lr  (code, s390_r1, ins->sreg2);
4005                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4006                         s390_a   (code, s390_r1, 0, ins->inst_basereg, ins->inst_offset);
4007                         s390_cs  (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
4008                         s390_jnz (code, -7);
4009                         s390_lr  (code, ins->dreg, s390_r1);
4010                 }
4011                         break;
4012                 case OP_ATOMIC_ADD_NEW_I4: {
4013                         s390_lr  (code, s390_r1, ins->sreg2);
4014                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4015                         s390_a   (code, s390_r1, 0, ins->inst_basereg, ins->inst_offset);
4016                         s390_cs  (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
4017                         s390_jnz (code, -7);
4018                         s390_lr  (code, ins->dreg, s390_r1);
4019                 }
4020                         break;
4021                 case OP_ATOMIC_EXCHANGE_I4: {
4022                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4023                         s390_cs  (code, s390_r0, ins->sreg2, ins->inst_basereg, ins->inst_offset);
4024                         s390_jnz (code, -4);
4025                         s390_lr  (code, ins->dreg, s390_r0);
4026                 }
4027                         break;
4028                 case OP_S390_BKCHAIN: {
4029                         s390_lr  (code, ins->dreg, ins->sreg1);
4030                         if (s390_is_imm16 (cfg->stack_offset)) {
4031                                 s390_ahi (code, ins->dreg, cfg->stack_offset);
4032                         } else {
4033                                 s390_basr (code, s390_r13, 0);
4034                                 s390_j    (code, 6);
4035                                 s390_word (code, cfg->stack_offset);
4036                                 s390_a    (code, ins->dreg, 0, s390_r13, 4);
4037                         }
4038                 }
4039                 case OP_MEMORY_BARRIER: {
4040                 }
4041                         break;
4042                 default:
4043                         g_warning ("unknown opcode %s in %s()\n", mono_inst_name (ins->opcode), __FUNCTION__);
4044                         g_assert_not_reached ();
4045                 }
4046
4047                 if ((cfg->opt & MONO_OPT_BRANCH) && ((code - cfg->native_code - offset) > max_len)) {
4048                         g_warning ("wrong maximal instruction length of instruction %s (expected %d, got %d)",
4049                                    mono_inst_name (ins->opcode), max_len, code - cfg->native_code - offset);
4050                         g_assert_not_reached ();
4051                 }
4052
4053                 cpos += max_len;
4054
4055                 last_ins = ins;
4056                 last_offset = offset;
4057
4058                 ins = ins->next;
4059         }
4060
4061         cfg->code_len = code - cfg->native_code;
4062 }
4063
4064 /*========================= End of Function ========================*/
4065
4066 /*------------------------------------------------------------------*/
4067 /*                                                                  */
4068 /* Name         - mono_arch_register_lowlevel_calls                 */
4069 /*                                                                  */
4070 /* Function     - Register routines to help with --trace operation. */
4071 /*                                                                  */
4072 /*------------------------------------------------------------------*/
4073
4074 void
4075 mono_arch_register_lowlevel_calls (void)
4076 {
4077         mono_register_jit_icall (mono_arch_break, "mono_arch_break", NULL, TRUE);
4078         mono_register_jit_icall (mono_arch_get_lmf_addr, "mono_arch_get_lmf_addr", NULL, TRUE);
4079 }
4080
4081 /*========================= End of Function ========================*/
4082
4083 /*------------------------------------------------------------------*/
4084 /*                                                                  */
4085 /* Name         - mono_arch_patch_code                              */
4086 /*                                                                  */
4087 /* Function     - Process the patch data created during the         */
4088 /*                instruction build process. This resolves jumps,   */
4089 /*                calls, variables etc.                             */
4090 /*                                                                  */
4091 /*------------------------------------------------------------------*/
4092
4093 static void
4094 mono_arch_break(void) {
4095 }
4096
4097 /*========================= End of Function ========================*/
4098
4099 /*------------------------------------------------------------------*/
4100 /*                                                                  */
4101 /* Name         - mono_arch_patch_code                              */
4102 /*                                                                  */
4103 /* Function     - Process the patch data created during the         */
4104 /*                instruction build process. This resolves jumps,   */
4105 /*                calls, variables etc.                             */
4106 /*                                                                  */
4107 /*------------------------------------------------------------------*/
4108
4109 void
4110 mono_arch_patch_code (MonoMethod *method, MonoDomain *domain,
4111                       guint8 *code, MonoJumpInfo *ji, gboolean run_cctors)
4112 {
4113         MonoJumpInfo *patch_info;
4114
4115         for (patch_info = ji; patch_info; patch_info = patch_info->next) {
4116                 unsigned char *ip = patch_info->ip.i + code;
4117                 gconstpointer target = NULL;
4118
4119                 target = mono_resolve_patch_target (method, domain, code,
4120                                                     patch_info, run_cctors);
4121
4122                 switch (patch_info->type) {
4123                         case MONO_PATCH_INFO_IP:
4124                         case MONO_PATCH_INFO_EXC_NAME:
4125                         case MONO_PATCH_INFO_LDSTR:
4126                         case MONO_PATCH_INFO_TYPE_FROM_HANDLE:
4127                         case MONO_PATCH_INFO_LDTOKEN:
4128                         case MONO_PATCH_INFO_EXC:
4129                                 continue;
4130                         case MONO_PATCH_INFO_SWITCH:
4131                                 /*----------------------------------*/
4132                                 /* ip points at the basr r13,0/j +4 */
4133                                 /* instruction the vtable value     */
4134                                 /* follows this (i.e. ip+6)         */
4135                                 /*----------------------------------*/
4136                                 *((gconstpointer *)(ip+6)) = target;
4137                                 target = NULL;
4138                                 continue;
4139                         case MONO_PATCH_INFO_METHODCONST:
4140                         case MONO_PATCH_INFO_CLASS:
4141                         case MONO_PATCH_INFO_IMAGE:
4142                         case MONO_PATCH_INFO_FIELD:
4143                         case MONO_PATCH_INFO_IID:
4144                                 target = S390_RELATIVE(target, ip);
4145                                 continue;
4146                         case MONO_PATCH_INFO_R4:
4147                         case MONO_PATCH_INFO_R8:
4148                         case MONO_PATCH_INFO_METHOD_REL:
4149                                 g_assert_not_reached ();
4150                                 continue;
4151                         default:
4152                                 target = S390_RELATIVE(target, ip);
4153                                 ip += 2;
4154                 }
4155                 s390_patch (ip, (guint32) target);
4156         }
4157 }
4158
4159 /*========================= End of Function ========================*/
4160
4161 /*------------------------------------------------------------------*/
4162 /*                                                                  */
4163 /* Name         - emit_load_volatile_registers                      */
4164 /*                                                                  */
4165 /* Function     - Create the instruction sequence for loading the   */
4166 /*                parameter registers for use with the 'tail' op.   */
4167 /*                                                                  */
4168 /*                The register loading operations performed here    */
4169 /*                are the mirror of the store operations performed  */
4170 /*                in mono_arch_emit_prolog and need to be kept in   */
4171 /*                synchronization with it.                          */
4172 /*                                                                  */
4173 /*------------------------------------------------------------------*/
4174
4175 guint8 *
4176 emit_load_volatile_registers(guint8 * code, MonoCompile *cfg)
4177 {
4178         MonoMethod *method = cfg->method;
4179         MonoMethodSignature *sig;
4180         MonoInst *inst;
4181         int pos, i;
4182         CallInfo *cinfo;
4183         size_data sz;
4184
4185         sig = mono_method_signature (method);
4186         pos = 0;
4187
4188         cinfo = calculate_sizes (sig, &sz, sig->pinvoke);
4189
4190         if (cinfo->struct_ret) {
4191                 ArgInfo *ainfo = &cinfo->ret;
4192                 inst         = cfg->ret;
4193                 s390_l (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4194         }
4195
4196         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
4197                 ArgInfo *ainfo = cinfo->args + i;
4198                 inst = cfg->args [pos];
4199
4200                 if (inst->opcode == OP_REGVAR) {
4201                         if (ainfo->regtype == RegTypeGeneral)
4202                                 s390_lr (code, ainfo->reg, inst->dreg);
4203                         else if (ainfo->regtype == RegTypeFP) {
4204                                 if (inst->dreg != ainfo->reg) {
4205                                         if (ainfo->size == 4) {
4206                                                 s390_ldebr (code, ainfo->reg, inst->dreg);
4207                                         } else {
4208                                                 s390_ldr   (code, ainfo->reg, inst->dreg);
4209                                         }
4210                                 }
4211                         }
4212                         else if (ainfo->regtype == RegTypeBase) {
4213                         } else
4214                                 g_assert_not_reached ();
4215                 } else {
4216                         if (ainfo->regtype == RegTypeGeneral) {
4217                                 if (!((ainfo->reg >= 2) && (ainfo->reg <= 6)))
4218                                         g_assert_not_reached();
4219                                 switch (ainfo->size) {
4220                                 case 1:
4221                                         s390_ic (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4222                                         break;
4223                                 case 2:
4224                                         s390_lh (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4225                                         break;
4226                                 case 8:
4227                                         s390_lm (code, ainfo->reg, ainfo->reg + 1,
4228                                                   inst->inst_basereg, inst->inst_offset);
4229                                         break;
4230                                 default:
4231                                         s390_l  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4232                                 }
4233                         } else if (ainfo->regtype == RegTypeBase) {
4234                         } else if (ainfo->regtype == RegTypeFP) {
4235                                 if (ainfo->size == 8)
4236                                         s390_ld (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4237                                 else if (ainfo->size == 4)
4238                                         s390_le (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4239                                 else
4240                                         g_assert_not_reached ();
4241                         } else if (ainfo->regtype == RegTypeStructByVal) {
4242                                 if (ainfo->reg != STK_BASE) {
4243                                         switch (ainfo->size) {
4244                                         case 1:
4245                                                 s390_ic (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4246                                                 break;
4247                                         case 2:
4248                                                 s390_lh (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4249                                                 break;
4250                                         case 4:
4251                                                 s390_l  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4252                                                 break;
4253                                         case 8:
4254                                                 s390_lm (code, ainfo->reg, ainfo->reg+1, inst->inst_basereg, inst->inst_offset);
4255                                                 break;
4256                                         }
4257                                 }
4258                         } else if (ainfo->regtype == RegTypeStructByAddr) {
4259                                 if (ainfo->reg != STK_BASE) {
4260                                         s390_l  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4261                                 }
4262                         } else
4263                                 g_assert_not_reached ();
4264                 }
4265                 pos++;
4266         }
4267
4268         g_free (cinfo);
4269
4270         return code;
4271 }
4272
4273 /*========================= End of Function ========================*/
4274
4275 /*------------------------------------------------------------------*/
4276 /*                                                                  */
4277 /* Name         - mono_arch_emit_prolog                             */
4278 /*                                                                  */
4279 /* Function     - Create the instruction sequence for a function    */
4280 /*                prolog.                                           */
4281 /*                                                                  */
4282 /*------------------------------------------------------------------*/
4283
4284 guint8 *
4285 mono_arch_emit_prolog (MonoCompile *cfg)
4286 {
4287         MonoMethod *method = cfg->method;
4288         MonoBasicBlock *bb;
4289         MonoMethodSignature *sig;
4290         MonoInst *inst;
4291         int alloc_size, pos, max_offset, i;
4292         guint8 *code;
4293         CallInfo *cinfo;
4294         size_data sz;
4295         int tracing = 0;
4296         int lmfOffset;                                                          \
4297
4298         if (mono_jit_trace_calls != NULL && mono_trace_eval (method))
4299                 tracing = 1;
4300
4301         cfg->code_size   = 512;
4302         cfg->native_code = code = g_malloc (cfg->code_size);
4303
4304         s390_stm  (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
4305
4306         if (cfg->flags & MONO_CFG_HAS_ALLOCA) {
4307                 cfg->used_int_regs |= 1 << 11;
4308         }
4309
4310         alloc_size = cfg->stack_offset;
4311
4312         cfg->stack_usage = alloc_size;
4313         s390_lr   (code, s390_r11, STK_BASE);
4314         if (s390_is_uimm16 (alloc_size)) {
4315                 s390_ahi  (code, STK_BASE, -alloc_size);
4316         } else {
4317                 int stackSize = alloc_size;
4318                 while (stackSize > 32767) {
4319                         s390_ahi  (code, STK_BASE, -32767);
4320                         stackSize -= 32767;
4321                 }
4322                 s390_ahi  (code, STK_BASE, -stackSize);
4323         }
4324         s390_st   (code, s390_r11, 0, STK_BASE, 0);
4325
4326         if (cfg->frame_reg != STK_BASE)
4327                 s390_lr (code, s390_r11, STK_BASE);
4328
4329         /* compute max_offset in order to use short forward jumps
4330          * we always do it on s390 because the immediate displacement
4331          * for jumps is too small
4332          */
4333         max_offset = 0;
4334         for (bb = cfg->bb_entry; bb; bb = bb->next_bb) {
4335                 MonoInst *ins = bb->code;
4336                 bb->max_offset = max_offset;
4337
4338                 if (cfg->prof_options & MONO_PROFILE_COVERAGE)
4339                         max_offset += 6;
4340
4341                 while (ins) {
4342                         max_offset += ((guint8 *)ins_get_spec (ins->opcode))[MONO_INST_LEN];
4343                         ins = ins->next;
4344                 }
4345         }
4346
4347         /* load arguments allocated to register from the stack */
4348         sig = mono_method_signature (method);
4349         pos = 0;
4350
4351         cinfo = calculate_sizes (sig, &sz, sig->pinvoke);
4352
4353         if (cinfo->struct_ret) {
4354                 ArgInfo *ainfo = &cinfo->ret;
4355                 inst         = cfg->ret;
4356                 inst->backend.size = ainfo->vtsize;
4357                 s390_st (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4358         }
4359
4360         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
4361                 ArgInfo *ainfo = cinfo->args + i;
4362                 inst = cfg->args [pos];
4363
4364                 if (inst->opcode == OP_REGVAR) {
4365                         if (ainfo->regtype == RegTypeGeneral)
4366                                 s390_lr (code, inst->dreg, ainfo->reg);
4367                         else if (ainfo->regtype == RegTypeFP) {
4368                                 if (inst->dreg != ainfo->reg) {
4369                                         if (ainfo->size == 4) {
4370                                                 s390_ledbr (code, inst->dreg, ainfo->reg);
4371                                         } else {
4372                                                 s390_ldr   (code, inst->dreg, ainfo->reg);
4373                                         }
4374                                 }
4375                         }
4376                         else if (ainfo->regtype == RegTypeBase) {
4377                                 s390_lr  (code, s390_r13, STK_BASE);
4378                                 s390_ahi (code, s390_r13, alloc_size);
4379                                 s390_l   (code, inst->dreg, 0, s390_r13, ainfo->offset);
4380                         } else
4381                                 g_assert_not_reached ();
4382
4383                         if (cfg->verbose_level > 2)
4384                                 g_print ("Argument %d assigned to register %s\n",
4385                                          pos, mono_arch_regname (inst->dreg));
4386                 } else {
4387                         if (ainfo->regtype == RegTypeGeneral) {
4388                                 if (!((ainfo->reg >= 2) && (ainfo->reg <= 6)))
4389                                         g_assert_not_reached();
4390                                 switch (ainfo->size) {
4391                                 case 1:
4392                                         s390_stc (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4393                                         break;
4394                                 case 2:
4395                                         s390_sth (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4396                                         break;
4397                                 case 8:
4398                                         s390_stm (code, ainfo->reg, ainfo->reg + 1,
4399                                                   inst->inst_basereg, inst->inst_offset);
4400                                         break;
4401                                 default:
4402                                         s390_st  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4403                                 }
4404                         } else if (ainfo->regtype == RegTypeBase) {
4405                         } else if (ainfo->regtype == RegTypeFP) {
4406                                 if (ainfo->size == 8)
4407                                         s390_std (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4408                                 else if (ainfo->size == 4)
4409                                         s390_ste (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4410                                 else
4411                                         g_assert_not_reached ();
4412                         } else if (ainfo->regtype == RegTypeStructByVal) {
4413                                 int doffset = inst->inst_offset;
4414                                 int reg;
4415                                 if (ainfo->reg != STK_BASE)
4416                                         reg = ainfo->reg;
4417                                 else {
4418                                         reg = s390_r0;
4419                                         s390_lr  (code, s390_r13, STK_BASE);
4420                                         s390_ahi (code, s390_r13, alloc_size);
4421                                 }
4422                                 switch (ainfo->size) {
4423                                         case 1:
4424                                                 if (ainfo->reg == STK_BASE)
4425                                                         s390_ic  (code, reg, 0, s390_r13, ainfo->offset+3);
4426                                                 s390_stc (code, reg, 0, inst->inst_basereg, doffset);
4427                                                 break;
4428                                         case 2:
4429                                                 if (ainfo->reg == STK_BASE)
4430                                                         s390_lh  (code, reg, 0, s390_r13, ainfo->offset+2);
4431                                                 s390_sth (code, reg, 0, inst->inst_basereg, doffset);
4432                                                 break;
4433                                         case 4:
4434                                                 if (ainfo->reg == STK_BASE)
4435                                                         s390_l   (code, reg, 0, s390_r13, ainfo->offset);
4436                                                 s390_st  (code, reg, 0, inst->inst_basereg, doffset);
4437                                                 break;
4438                                         case 8:
4439                                                 if (ainfo->reg == STK_BASE)
4440                                                         s390_lm  (code, s390_r0, s390_r1, s390_r13, ainfo->offset);
4441                                                 s390_stm (code, reg, reg+1, inst->inst_basereg, doffset);
4442                                                 break;
4443                                 }
4444                         } else if (ainfo->regtype == RegTypeStructByAddr) {
4445                                 if (ainfo->reg != STK_BASE)
4446                                         s390_st  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4447                         } else
4448                                 g_assert_not_reached ();
4449                 }
4450                 pos++;
4451         }
4452
4453         if (method->save_lmf) {
4454                 /*---------------------------------------------------------------*/
4455                 /* we build the MonoLMF structure on the stack - see mini-s390.h */
4456                 /*---------------------------------------------------------------*/
4457                 lmfOffset = alloc_size - sizeof(MonoLMF);
4458
4459                 s390_lr    (code, s390_r13, cfg->frame_reg);
4460                 if (s390_is_uimm16(lmfOffset))
4461                         s390_ahi   (code, s390_r13, lmfOffset);
4462                 else {
4463                         s390_basr (code, s390_r14, 0);
4464                         s390_j    (code, 4);
4465                         s390_word (code, lmfOffset);
4466                         s390_a    (code, s390_r13, 0, s390_r14, 4);
4467                 }
4468
4469                 /*---------------------------------------------------------------*/
4470                 /* Preserve the parameter registers while we fix up the lmf      */
4471                 /*---------------------------------------------------------------*/
4472                 s390_stm   (code, s390_r2, s390_r6, s390_r13,
4473                             G_STRUCT_OFFSET(MonoLMF, pregs[0]));
4474
4475                 /*---------------------------------------------------------------*/
4476                 /* On return from this call r2 have the address of the &lmf      */
4477                 /*---------------------------------------------------------------*/
4478                 mono_add_patch_info (cfg, code - cfg->native_code,
4479                                      MONO_PATCH_INFO_INTERNAL_METHOD,
4480                                      (gpointer)"mono_get_lmf_addr");
4481                 s390_brasl (code, s390_r14, 0);
4482
4483                 /*---------------------------------------------------------------*/
4484                 /* Set lmf.lmf_addr = jit_tls->lmf                               */
4485                 /*---------------------------------------------------------------*/
4486                 s390_st    (code, s390_r2, 0, s390_r13,
4487                             G_STRUCT_OFFSET(MonoLMF, lmf_addr));
4488
4489                 /*---------------------------------------------------------------*/
4490                 /* Get current lmf                                               */
4491                 /*---------------------------------------------------------------*/
4492                 s390_l     (code, s390_r0, 0, s390_r2, 0);
4493
4494                 /*---------------------------------------------------------------*/
4495                 /* Set our lmf as the current lmf                                */
4496                 /*---------------------------------------------------------------*/
4497                 s390_st    (code, s390_r13, 0, s390_r2, 0);
4498
4499                 /*---------------------------------------------------------------*/
4500                 /* Have our lmf.previous_lmf point to the last lmf               */
4501                 /*---------------------------------------------------------------*/
4502                 s390_st    (code, s390_r0, 0, s390_r13,
4503                             G_STRUCT_OFFSET(MonoLMF, previous_lmf));
4504
4505                 /*---------------------------------------------------------------*/
4506                 /* save method info                                              */
4507                 /*---------------------------------------------------------------*/
4508                 s390_basr  (code, s390_r1, 0);
4509                 s390_j     (code, 4);
4510                 s390_word  (code, method);
4511                 s390_l     (code, s390_r1, 0, s390_r1, 4);
4512                 s390_st    (code, s390_r1, 0, s390_r13,
4513                             G_STRUCT_OFFSET(MonoLMF, method));
4514
4515                 /*---------------------------------------------------------------*/
4516                 /* save the current IP                                           */
4517                 /*---------------------------------------------------------------*/
4518                 s390_st    (code, STK_BASE, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, ebp));
4519                 s390_basr  (code, s390_r1, 0);
4520                 s390_la    (code, s390_r1, 0, s390_r1, 0);
4521                 s390_st    (code, s390_r1, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, eip));
4522
4523                 /*---------------------------------------------------------------*/
4524                 /* Save general and floating point registers                     */
4525                 /*---------------------------------------------------------------*/
4526                 s390_stm   (code, s390_r2, s390_r12, s390_r13,
4527                             G_STRUCT_OFFSET(MonoLMF, gregs[2]));
4528                 for (i = 0; i < 16; i++) {
4529                         s390_std  (code, i, 0, s390_r13,
4530                                    G_STRUCT_OFFSET(MonoLMF, fregs[i]));
4531                 }
4532
4533                 /*---------------------------------------------------------------*/
4534                 /* Restore the parameter registers now that we've set up the lmf */
4535                 /*---------------------------------------------------------------*/
4536                 s390_lm    (code, s390_r2, s390_r6, s390_r13,
4537                             G_STRUCT_OFFSET(MonoLMF, pregs[0]));
4538         }
4539
4540         if (tracing)
4541                 code = mono_arch_instrument_prolog(cfg, enter_method, code, TRUE);
4542
4543         cfg->code_len = code - cfg->native_code;
4544         g_free (cinfo);
4545
4546         return code;
4547 }
4548
4549 /*========================= End of Function ========================*/
4550
4551 /*------------------------------------------------------------------*/
4552 /*                                                                  */
4553 /* Name         - mono_arch_emit_epilog                             */
4554 /*                                                                  */
4555 /* Function     - Emit the instructions for a function epilog.      */
4556 /*                                                                  */
4557 /*------------------------------------------------------------------*/
4558
4559 void
4560 mono_arch_emit_epilog (MonoCompile *cfg)
4561 {
4562         MonoMethod *method = cfg->method;
4563         int tracing = 0;
4564         guint8 *code;
4565         int max_epilog_size = 96;
4566
4567         if (cfg->method->save_lmf)
4568                 max_epilog_size += 128;
4569
4570         if (mono_jit_trace_calls != NULL)
4571                 max_epilog_size += 128;
4572
4573         if (cfg->prof_options & MONO_PROFILE_ENTER_LEAVE)
4574                 max_epilog_size += 128;
4575
4576         while ((cfg->code_len + max_epilog_size) > (cfg->code_size - 16)) {
4577                 cfg->code_size  *= 2;
4578                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
4579                 mono_jit_stats.code_reallocs++;
4580         }
4581
4582         code = cfg->native_code + cfg->code_len;
4583
4584         if (mono_jit_trace_calls != NULL && mono_trace_eval (method)) {
4585                 code = mono_arch_instrument_epilog (cfg, leave_method, code, TRUE);
4586                 tracing = 1;
4587         }
4588
4589         if (method->save_lmf)
4590                 restoreLMF(code, cfg->frame_reg, cfg->stack_usage);
4591
4592         if (cfg->flags & MONO_CFG_HAS_ALLOCA)
4593                 s390_l (code, STK_BASE, 0, STK_BASE, 0);
4594         else
4595                 code = backUpStackPtr(cfg, code, STK_BASE);
4596
4597         s390_lm  (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
4598         s390_br  (code, s390_r14);
4599
4600         cfg->code_len = code - cfg->native_code;
4601
4602         g_assert (cfg->code_len < cfg->code_size);
4603
4604 }
4605
4606 /*========================= End of Function ========================*/
4607
4608 /*------------------------------------------------------------------*/
4609 /*                                                                  */
4610 /* Name         - mono_arch_emit_exceptions                         */
4611 /*                                                                  */
4612 /* Function     - Emit the blocks to handle exception conditions.   */
4613 /*                                                                  */
4614 /*------------------------------------------------------------------*/
4615
4616 void
4617 mono_arch_emit_exceptions (MonoCompile *cfg)
4618 {
4619         MonoJumpInfo    *patch_info;
4620         guint8          *code;
4621         int             nThrows = 0,
4622                         exc_count = 0,
4623                         iExc;
4624         guint32         code_size;
4625         MonoClass       *exc_classes [MAX_EXC];
4626         guint8          *exc_throw_start [MAX_EXC];
4627
4628         for (patch_info = cfg->patch_info;
4629              patch_info;
4630              patch_info = patch_info->next) {
4631                 if (patch_info->type == MONO_PATCH_INFO_EXC)
4632                         exc_count++;
4633         }
4634
4635         code_size = exc_count * 26;
4636
4637         while ((cfg->code_len + code_size) > (cfg->code_size - 16)) {
4638                 cfg->code_size  *= 2;
4639                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
4640                 mono_jit_stats.code_reallocs++;
4641         }
4642
4643         code = cfg->native_code + cfg->code_len;
4644
4645         /*---------------------------------------------------------------------*/
4646         /* Add code to raise exceptions                                        */
4647         /*---------------------------------------------------------------------*/
4648         for (patch_info = cfg->patch_info; patch_info; patch_info = patch_info->next) {
4649                 switch (patch_info->type) {
4650                 case MONO_PATCH_INFO_EXC: {
4651                         guint8 *ip = patch_info->ip.i + cfg->native_code;
4652                         MonoClass *exc_class;
4653                         guint32 throw_ip;
4654
4655                         /*-----------------------------------------------------*/
4656                         /* Patch the branch in epilog to come here             */
4657                         /*-----------------------------------------------------*/
4658                         s390_patch (ip + 2, (guint32) (S390_RELATIVE(code,ip)));
4659
4660                         exc_class = mono_class_from_name (mono_defaults.corlib,
4661                                                           "System",
4662                                                           patch_info->data.name);
4663                         g_assert (exc_class);
4664                         throw_ip = patch_info->ip.i;
4665
4666                         for (iExc = 0; iExc < nThrows; ++iExc)
4667                                 if (exc_classes [iExc] == exc_class)
4668                                         break;
4669
4670                         if (iExc < nThrows) {
4671                                 s390_jcl (code, S390_CC_UN, (guint32) exc_throw_start [iExc]);
4672                                 patch_info->type = MONO_PATCH_INFO_NONE;
4673                         } else {
4674
4675                                 if (nThrows < MAX_EXC) {
4676                                         exc_classes [nThrows]     = exc_class;
4677                                         exc_throw_start [nThrows] = code;
4678                                 }
4679
4680                                 /*---------------------------------------------*/
4681                                 /* Patch the parameter passed to the handler   */
4682                                 /*---------------------------------------------*/
4683                                 s390_basr (code, s390_r13, 0);
4684                                 s390_j    (code, 4);
4685                                 s390_word (code, patch_info->data.target);
4686                                 /*---------------------------------------------*/
4687                                 /* Load return address & parameter register    */
4688                                 /*---------------------------------------------*/
4689                                 s390_larl (code, s390_r14, S390_RELATIVE((patch_info->ip.i +
4690                                                            cfg->native_code + 8), code));
4691                                 s390_l    (code, s390_r2, 0, s390_r13, 4);
4692                                 /*---------------------------------------------*/
4693                                 /* Reuse the current patch to set the jump     */
4694                                 /*---------------------------------------------*/
4695                                 patch_info->type      = MONO_PATCH_INFO_INTERNAL_METHOD;
4696                                 patch_info->data.name = "mono_arch_throw_exception_by_name";
4697                                 patch_info->ip.i      = code - cfg->native_code;
4698                                 s390_jcl  (code, S390_CC_UN, 0);
4699                         }
4700                         break;
4701                 }
4702                 default:
4703                         /* do nothing */
4704                         break;
4705                 }
4706         }
4707
4708         cfg->code_len = code - cfg->native_code;
4709
4710         g_assert (cfg->code_len < cfg->code_size);
4711
4712 }
4713
4714 /*========================= End of Function ========================*/
4715
4716 /*------------------------------------------------------------------*/
4717 /*                                                                  */
4718 /* Name         - mono_arch_setup_jit_tls_data                      */
4719 /*                                                                  */
4720 /* Function     - Setup the JIT's Thread Level Specific Data.       */
4721 /*                                                                  */
4722 /*------------------------------------------------------------------*/
4723
4724 void
4725 mono_arch_setup_jit_tls_data (MonoJitTlsData *tls)
4726 {
4727
4728         if (!tls_offset_inited) {
4729                 tls_offset_inited = TRUE;
4730
4731 #if HAVE_KW_THREAD
4732 # if 0
4733         __asm__ ("\tear\t%r1,0\n"
4734                  "\tlr\t%0,%3\n"
4735                  "\tsr\t%0,%r1\n"
4736                  "\tlr\t%1,%4\n"
4737                  "\tsr\t%1,%r1\n"
4738                  "\tlr\t%2,%5\n"
4739                  "\tsr\t%2,%r1\n"
4740                  : "=r" (appdomain_tls_offset),
4741                    "=r" (thread_tls_offset),
4742                    "=r" (lmf_tls_offset)
4743                  : "r" (&tls_appdomain),
4744                    "r" (&tls_current_object),
4745                    "r" (&mono_lmf_addr)
4746                  : "1", "cc");
4747 # endif
4748 #endif
4749         }
4750
4751         if (!lmf_addr_key_inited) {
4752                 lmf_addr_key_inited = TRUE;
4753                 pthread_key_create (&lmf_addr_key, NULL);
4754         }
4755         pthread_setspecific (lmf_addr_key, &tls->lmf);
4756
4757 }
4758
4759 /*========================= End of Function ========================*/
4760
4761 /*------------------------------------------------------------------*/
4762 /*                                                                  */
4763 /* Name         - mono_arch_free_jit_tls_data                       */
4764 /*                                                                  */
4765 /* Function     - Free tls data.                                    */
4766 /*                                                                  */
4767 /*------------------------------------------------------------------*/
4768
4769 void
4770 mono_arch_free_jit_tls_data (MonoJitTlsData *tls)
4771 {
4772
4773 }
4774
4775 /*========================= End of Function ========================*/
4776
4777 /*------------------------------------------------------------------*/
4778 /*                                                                  */
4779 /* Name         - mono_arch_emit_this_vret_args                     */
4780 /*                                                                  */
4781 /* Function     -                                                   */
4782 /*                                                                  */
4783 /*------------------------------------------------------------------*/
4784
4785 void
4786 mono_arch_emit_this_vret_args (MonoCompile *cfg, MonoCallInst *inst, int this_reg, int this_type, int vt_reg)
4787 {
4788         int this_dreg = s390_r2;
4789
4790         if (vt_reg != -1)
4791                 this_dreg = s390_r3;
4792
4793         /* add the this argument */
4794         if (this_reg != -1) {
4795                 MonoInst *this;
4796                 MONO_INST_NEW (cfg, this, OP_SETREG);
4797                 this->type  = this_type;
4798                 this->sreg1 = this_reg;
4799                 this->dreg  = mono_regstate_next_int (cfg->rs);
4800                 mono_bblock_add_inst (cfg->cbb, this);
4801                 mono_call_inst_add_outarg_reg (cfg, inst, this->dreg, this_dreg, FALSE);
4802         }
4803
4804         if (vt_reg != -1) {
4805                 MonoInst *vtarg;
4806                 MONO_INST_NEW (cfg, vtarg, OP_SETREG);
4807                 vtarg->type  = STACK_MP;
4808                 vtarg->sreg1 = vt_reg;
4809                 vtarg->dreg  = mono_regstate_next_int (cfg->rs);
4810                 mono_bblock_add_inst (cfg->cbb, vtarg);
4811                 mono_call_inst_add_outarg_reg (cfg, inst, vtarg->dreg, s390_r2, FALSE);
4812         }
4813 }
4814
4815 /*========================= End of Function ========================*/
4816
4817 /*------------------------------------------------------------------*/
4818 /*                                                                  */
4819 /* Name         - mono_arch_get_inst_for_method                   */
4820 /*                                                                  */
4821 /* Function     - Check for opcodes we can handle directly in       */
4822 /*                hardware.                                         */
4823 /*                                                                  */
4824 /*------------------------------------------------------------------*/
4825
4826 MonoInst*
4827 mono_arch_get_inst_for_method (MonoCompile *cfg, MonoMethod *cmethod,
4828                                MonoMethodSignature *fsig, MonoInst **args)
4829 {
4830         MonoInst *ins = NULL;
4831
4832         if (cmethod->klass == mono_defaults.math_class) {
4833                 if (strcmp (cmethod->name, "Sqrt") == 0) {
4834                         MONO_INST_NEW (cfg, ins, OP_SQRT);
4835                         ins->inst_i0 = args [0];
4836                 }
4837         } else if (cmethod->klass == mono_defaults.thread_class &&
4838                            strcmp (cmethod->name, "MemoryBarrier") == 0) {
4839                 MONO_INST_NEW (cfg, ins, OP_MEMORY_BARRIER);
4840         } else if(cmethod->klass->image == mono_defaults.corlib &&
4841                            (strcmp (cmethod->klass->name_space, "System.Threading") == 0) &&
4842                            (strcmp (cmethod->klass->name, "Interlocked") == 0)) {
4843
4844                 if (strcmp (cmethod->name, "Increment") == 0 &&
4845                     fsig->params [0]->type == MONO_TYPE_I4) {
4846                         MonoInst *ins_iconst;
4847
4848                         MONO_INST_NEW (cfg, ins, OP_ATOMIC_ADD_NEW_I4);
4849                         MONO_INST_NEW (cfg, ins_iconst, OP_ICONST);
4850                         ins_iconst->inst_c0 = 1;
4851
4852                         ins->inst_i0 = args [0];
4853                         ins->inst_i1 = ins_iconst;
4854                 } else if (strcmp (cmethod->name, "Decrement") == 0 &&
4855                            fsig->params [0]->type == MONO_TYPE_I4) {
4856                         MonoInst *ins_iconst;
4857
4858                         MONO_INST_NEW (cfg, ins, OP_ATOMIC_ADD_NEW_I4);
4859                         MONO_INST_NEW (cfg, ins_iconst, OP_ICONST);
4860                         ins_iconst->inst_c0 = -1;
4861
4862                         ins->inst_i0 = args [0];
4863                         ins->inst_i1 = ins_iconst;
4864                 } else if (strcmp (cmethod->name, "Exchange") == 0 &&
4865                            fsig->params [0]->type == MONO_TYPE_I4) {
4866                         MONO_INST_NEW (cfg, ins, OP_ATOMIC_EXCHANGE_I4);
4867
4868                         ins->inst_i0 = args [0];
4869                         ins->inst_i1 = args [1];
4870                 } else if (strcmp (cmethod->name, "Add") == 0 &&
4871                            fsig->params [0]->type == MONO_TYPE_I4) {
4872                         MONO_INST_NEW (cfg, ins, OP_ATOMIC_ADD_I4);
4873
4874                         ins->inst_i0 = args [0];
4875                         ins->inst_i1 = args [1];
4876                 }
4877         }
4878         return ins;
4879 }
4880
4881 /*========================= End of Function ========================*/
4882
4883 /*------------------------------------------------------------------*/
4884 /*                                                                  */
4885 /* Name         - mono_arch_print_tree                              */
4886 /*                                                                  */
4887 /* Function     - Print platform-specific opcode details.           */
4888 /*                                                                  */
4889 /* Returns      - 1 - opcode details have been printed              */
4890 /*                0 - opcode details have not been printed          */
4891 /*                                                                  */
4892 /*------------------------------------------------------------------*/
4893
4894 gboolean
4895 mono_arch_print_tree (MonoInst *tree, int arity)
4896 {
4897         gboolean done;
4898
4899         switch (tree->opcode) {
4900                 case OP_S390_LOADARG:
4901                 case OP_S390_ARGREG:
4902                 case OP_S390_ARGPTR:
4903                         printf ("[0x%lx(%s)]", tree->inst_offset,
4904                                 mono_arch_regname (tree->inst_basereg));
4905                         done = 1;
4906                         break;
4907                 case OP_S390_STKARG:
4908                         printf ("[0x%lx(previous_frame)]",
4909                                 tree->inst_offset);
4910                         done = 1;
4911                         break;
4912                 case OP_S390_MOVE:
4913                         printf ("[0x%lx(%d,%s),0x%lx(%s)]",
4914                                 tree->inst_offset, tree->backend.size,
4915                                 mono_arch_regname(tree->dreg), tree->inst_imm,
4916                                 mono_arch_regname(tree->sreg1));
4917                         done = 1;
4918                         break;
4919                 case OP_S390_SETF4RET:
4920                         printf ("[%s,%s]",
4921                                 mono_arch_fregname (tree->dreg),
4922                                 mono_arch_fregname (tree->sreg1));
4923                         done = 1;
4924                         break;
4925                 case OP_TLS_GET:
4926                         printf ("[0x%lx(0x%lx,%s)]", tree->inst_offset,
4927                                 tree->inst_imm,
4928                                 mono_arch_regname (tree->sreg1));
4929                         done = 1;
4930                         break;
4931                 case OP_S390_BKCHAIN:
4932                         printf ("[previous_frame(%s)]",
4933                                 mono_arch_regname (tree->sreg1));
4934                         done = 1;
4935                         break;
4936                 default:
4937                         done = 0;
4938         }
4939         return (done);
4940 }
4941
4942 /*========================= End of Function ========================*/
4943
4944 /*------------------------------------------------------------------*/
4945 /*                                                                  */
4946 /* Name         - mono_arch_regalloc_cost                           */
4947 /*                                                                  */
4948 /* Function     - Determine the cost, in the number of memory       */
4949 /*                references, of the action of allocating the var-  */
4950 /*                iable VMV into a register during global register  */
4951 /*                allocation.                                       */
4952 /*                                                                  */
4953 /* Returns      - Cost                                              */
4954 /*                                                                  */
4955 /*------------------------------------------------------------------*/
4956
4957 guint32
4958 mono_arch_regalloc_cost (MonoCompile *cfg, MonoMethodVar *vmv)
4959 {
4960         /* FIXME: */
4961         return 2;
4962 }
4963
4964 /*========================= End of Function ========================*/
4965
4966 /*------------------------------------------------------------------*/
4967 /*                                                                  */
4968 /* Name         - mono_arch_get_domain_intrinsic                    */
4969 /*                                                                  */
4970 /* Function     -                                                   */
4971 /*                                                                  */
4972 /* Returns      -                                                   */
4973 /*                                                                  */
4974 /*------------------------------------------------------------------*/
4975
4976 MonoInst *
4977 mono_arch_get_domain_intrinsic (MonoCompile* cfg)
4978 {
4979         MonoInst *ins;
4980
4981         if (appdomain_tls_offset == -1)
4982                 return NULL;
4983
4984         MONO_INST_NEW (cfg, ins, OP_TLS_GET);
4985         ins->inst_offset = appdomain_tls_offset;
4986         return (ins);
4987 }
4988
4989 /*========================= End of Function ========================*/
4990
4991 /*------------------------------------------------------------------*/
4992 /*                                                                  */
4993 /* Name         - mono_arch_get_thread_intrinsic                    */
4994 /*                                                                  */
4995 /* Function     -                                                   */
4996 /*                                                                  */
4997 /* Returns      -                                                   */
4998 /*                                                                  */
4999 /*------------------------------------------------------------------*/
5000
5001 MonoInst *
5002 mono_arch_get_thread_intrinsic (MonoCompile* cfg)
5003 {
5004         MonoInst *ins;
5005
5006         if (thread_tls_offset == -1)
5007                 return NULL;
5008
5009         MONO_INST_NEW (cfg, ins, OP_TLS_GET);
5010         ins->inst_offset = thread_tls_offset;
5011         return (ins);
5012 }
5013
5014 /*========================= End of Function ========================*/
5015
5016 /*------------------------------------------------------------------*/
5017 /*                                                                  */
5018 /* Name         - mono_arch_flush_register_windows                  */
5019 /*                                                                  */
5020 /* Function     -                                                   */
5021 /*                                                                  */
5022 /* Returns      -                                                   */
5023 /*                                                                  */
5024 /*------------------------------------------------------------------*/
5025
5026 void
5027 mono_arch_flush_register_windows (void)
5028 {
5029 }
5030
5031 /*========================= End of Function ========================*/
5032
5033 /*------------------------------------------------------------------*/
5034 /*                                                                  */
5035 /* Name         - mono_arch_get_lmf_addr                            */
5036 /*                                                                  */
5037 /* Function     -                                                   */
5038 /*                                                                  */
5039 /* Returns      -                                                   */
5040 /*                                                                  */
5041 /*------------------------------------------------------------------*/
5042
5043 gpointer
5044 mono_arch_get_lmf_addr (void)
5045 {
5046         return pthread_getspecific (lmf_addr_key);
5047 }
5048
5049
5050 /*========================= End of Function ========================*/
5051
5052 /*------------------------------------------------------------------*/
5053 /*                                                                  */
5054 /* Name         - mono_arch_get_patch_offset                        */
5055 /*                                                                  */
5056 /* Function     - Dummy entry point until s390x supports aot.       */
5057 /*                                                                  */
5058 /* Returns      - Offset for patch.                                 */
5059 /*                                                                  */
5060 /*------------------------------------------------------------------*/
5061
5062 guint32
5063 mono_arch_get_patch_offset (guint8 *code)
5064 {
5065         return 0;
5066 }
5067
5068 /*========================= End of Function ========================*/