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 EMIT_COND_BRANCH(ins,cond)                                                      \
  22 {                                                                                       \
  23 if (ins->flags & MONO_INST_BRLABEL) {                                                   \
  24         if (ins->inst_i0->inst_c0) {                                                    \
  25                 int displace;                                                           \
  26                 displace = ((cfg->native_code + ins->inst_i0->inst_c0) - code) / 2;     \
  27                 if (s390_is_imm16(displace)) {                                          \
  28                         s390_brc (code, cond, displace);                                \
  29                 } else {                                                                \
  30                         s390_jcl (code, cond, displace);                                \
  31                 }                                                                       \
  32         } else {                                                                        \
  33                 mono_add_patch_info (cfg, code - cfg->native_code,                      \
  34                                      MONO_PATCH_INFO_LABEL, ins->inst_i0);              \
  35                 s390_jcl (code, cond, 0);                                               \
  36         }                                                                               \
  37 } else {                                                                                \
  38         if (ins->inst_true_bb->native_offset) {                                         \
  39                 int displace;                                                           \
  40                 displace = ((cfg->native_code +                                         \
  41                             ins->inst_true_bb->native_offset) - code) / 2;              \
  42                 if (s390_is_imm16(displace)) {                                          \
  43                         s390_brc (code, cond, displace);                                \
  44                 } else {                                                                \
  45                         s390_jcl (code, cond, displace);                                \
  46                 }                                                                       \
  47         } else {                                                                        \
  48                 mono_add_patch_info (cfg, code - cfg->native_code,                      \
  49                                      MONO_PATCH_INFO_BB, ins->inst_true_bb);            \
  50                 s390_jcl (code, cond, 0);                                               \
  51         }                                                                               \
  52 }                                                                                       \
  53 }
  54
  55 #define EMIT_UNCOND_BRANCH(ins)                                                         \
  56 {                                                                                       \
  57 if (ins->flags & MONO_INST_BRLABEL) {                                                   \
  58         if (ins->inst_i0->inst_c0) {                                                    \
  59                 int displace;                                                           \
  60                 displace = ((cfg->native_code + ins->inst_i0->inst_c0) - code) / 2;     \
  61                 if (s390_is_imm16(displace)) {                                          \
  62                         s390_brc (code, S390_CC_UN, displace);                          \
  63                 } else {                                                                \
  64                         s390_jcl (code, S390_CC_UN, displace);                          \
  65                 }                                                                       \
  66         } else {                                                                        \
  67                 mono_add_patch_info (cfg, code - cfg->native_code,                      \
  68                                      MONO_PATCH_INFO_LABEL, ins->inst_i0);              \
  69                 s390_jcl (code, S390_CC_UN, 0);                                         \
  70         }                                                                               \
  71 } else {                                                                                \
  72         if (ins->inst_target_bb->native_offset) {                                       \
  73                 int displace;                                                           \
  74                 displace = ((cfg->native_code +                                         \
  75                             ins->inst_target_bb->native_offset) - code) / 2;            \
  76                 if (s390_is_imm16(displace)) {                                          \
  77                         s390_brc (code, S390_CC_UN, displace);                          \
  78                 } else {                                                                \
  79                         s390_jcl (code, S390_CC_UN, displace);                          \
  80                 }                                                                       \
  81         } else {                                                                        \
  82                 mono_add_patch_info (cfg, code - cfg->native_code,                      \
  83                                      MONO_PATCH_INFO_BB, ins->inst_target_bb);          \
  84                 s390_jcl (code, S390_CC_UN, 0);                                         \
  85         }                                                                               \
  86 }                                                                                       \
  87 }
  88
  89 #define EMIT_COND_SYSTEM_EXCEPTION(cond,exc_name)                       \
  90         do {                                                            \
  91                 mono_add_patch_info (cfg, code - cfg->native_code,      \
  92                                     MONO_PATCH_INFO_EXC, exc_name);     \
  93                 s390_jcl (code, cond, 0);                               \
  94         } while (0);
  95
  96 #define CHECK_SRCDST_COM                                                \
  97         if (ins->dreg == ins->sreg2) {                                  \
  98                 src2 = ins->sreg1;                                      \
  99         } else {                                                        \
 100                 src2 = ins->sreg2;                                      \
 101                 if (ins->dreg != ins->sreg1) {                          \
 102                         s390_lr  (code, ins->dreg, ins->sreg1);         \
 103                 }                                                       \
 104         }
 105
 106 #define CHECK_SRCDST_NCOM                                               \
 107         if (ins->dreg == ins->sreg2) {                                  \
 108                 src2 = s390_r13;                                        \
 109                 s390_lr  (code, s390_r13, ins->sreg2);                  \
 110         } else {                                                        \
 111                 src2 = ins->sreg2;                                      \
 112         }                                                               \
 113         if (ins->dreg != ins->sreg1) {                                  \
 114                 s390_lr  (code, ins->dreg, ins->sreg1);                 \
 115         }
 116
 117 #define CHECK_SRCDST_COM_F                                              \
 118         if (ins->dreg == ins->sreg2) {                                  \
 119                 src2 = ins->sreg1;                                      \
 120         } else {                                                        \
 121                 src2 = ins->sreg2;                                      \
 122                 if (ins->dreg != ins->sreg1) {                          \
 123                         s390_ldr (code, ins->dreg, ins->sreg1);         \
 124                 }                                                       \
 125         }
 126
 127 #define CHECK_SRCDST_NCOM_F                                             \
 128         if (ins->dreg == ins->sreg2) {                                  \
 129                 src2 = s390_f15;                                        \
 130                 s390_ldr (code, s390_r13, ins->sreg2);                  \
 131         } else {                                                        \
 132                 src2 = ins->sreg2;                                      \
 133         }                                                               \
 134         if (ins->dreg != ins->sreg1) {                                  \
 135                 s390_ldr (code, ins->dreg, ins->sreg1);                 \
 136         }
 137
 138 #undef DEBUG
 139 #define DEBUG(a) if (cfg->verbose_level > 1) a
 140
 141 #define MAX_EXC 16
 142
 143 #define S390_TRACE_STACK_SIZE (5*sizeof(gint32)+3*sizeof(gdouble))
 144
 145 #define MAX (a, b) ((a) > (b) ? (a) : (b))
 146
 147 /*========================= End of Defines =========================*/
 148
 149 /*------------------------------------------------------------------*/
 150 /*                 I n c l u d e s                                  */
 151 /*------------------------------------------------------------------*/
 152
 153 #include "mini.h"
 154 #include <string.h>
 155
 156 #include <mono/metadata/appdomain.h>
 157 #include <mono/metadata/debug-helpers.h>
 158 #include <mono/metadata/profiler-private.h>
 159 #include <mono/utils/mono-math.h>
 160
 161 #include "mini-s390.h"
 162 #include "inssel.h"
 163 #include "cpu-s390.h"
 164 #include "jit-icalls.h"
 165
 166 /*========================= End of Includes ========================*/
 167
 168 /*------------------------------------------------------------------*/
 169 /*                 T y p e d e f s                                  */
 170 /*------------------------------------------------------------------*/
 171
 172 typedef struct {
 173         guint stack_size,
 174               local_size,
 175               code_size,
 176               parm_size,
 177               offset,
 178               offStruct,
 179               retStruct;
 180 } size_data;
 181
 182 /*------------------------------------------------------------------*/
 183 /* Used by the instrument_emit_epilog                               */
 184 /*------------------------------------------------------------------*/
 185
 186 enum {
 187         SAVE_NONE,
 188         SAVE_STRUCT,
 189         SAVE_ONE,
 190         SAVE_TWO,
 191         SAVE_R4,
 192         SAVE_R8
 193 };
 194
 195 typedef struct InstList InstList;
 196
 197 struct InstList {
 198         InstList *prev;
 199         InstList *next;
 200         MonoInst *data;
 201 };
 202
 203 enum {
 204         RegTypeGeneral,
 205         RegTypeBase,
 206         RegTypeFP,
 207         RegTypeStructByVal,
 208         RegTypeStructByAddr
 209 };
 210
 211 typedef struct {
 212         gint32  offset;         /* offset from caller's stack */
 213         gint32  offparm;        /* offset from callee's stack */
 214         guint16 vtsize;         /* in param area */
 215         guint8  reg;
 216         guint8  regtype;        /* See RegType* */
 217         guint32 size;           /* Size of structure used by RegTypeStructByVal */
 218 } ArgInfo;
 219
 220 typedef struct {
 221         int nargs;
 222         int lastgr;
 223         guint32 stack_usage;
 224         guint32 struct_ret;
 225         ArgInfo ret;
 226         ArgInfo sigCookie;
 227         ArgInfo args [1];
 228 } CallInfo;
 229
 230 typedef struct {
 231         gint32  gr[5];          /* R2-R6                            */
 232         gdouble fp[3];          /* F0-F2                            */
 233 } __attribute__ ((packed)) RegParm;
 234
 235 /*========================= End of Typedefs ========================*/
 236
 237 /*------------------------------------------------------------------*/
 238 /*                   P r o t o t y p e s                            */
 239 /*------------------------------------------------------------------*/
 240
 241 static void indent (int);
 242 static guint8 * backUpStackPtr(MonoCompile *, guint8 *, gint);
 243 static void decodeParm (MonoType *, void *, int);
 244 static void enter_method (MonoMethod *, RegParm *, char *);
 245 static void leave_method (MonoMethod *, ...);
 246 static gboolean is_regsize_var (MonoType *);
 247 static inline void add_general (guint *, size_data *, ArgInfo *, gboolean);
 248 static inline void add_stackParm (guint *, size_data *, ArgInfo *, gint);
 249 static inline void add_float (guint *, size_data *, ArgInfo *);
 250 static CallInfo * calculate_sizes (MonoCompile *, MonoMethodSignature *, size_data *, gboolean);
 251 static guchar * emit_float_to_int (MonoCompile *, guchar *, int, int, int, gboolean);
 252 gpointer mono_arch_get_lmf_addr (void);
 253 static guint8 * emit_load_volatile_registers(guint8 *, MonoCompile *);
 254 static void emit_sig_cookie (MonoCompile *, MonoCallInst *, CallInfo *, int);
 255
 256 /*========================= End of Prototypes ======================*/
 257
 258 /*------------------------------------------------------------------*/
 259 /*                 G l o b a l   V a r i a b l e s                  */
 260 /*------------------------------------------------------------------*/
 261
 262 int mono_exc_esp_offset = 0;
 263
 264 static int indent_level = 0;
 265
 266 static gboolean tls_offset_inited = FALSE;
 267
 268 static int appdomain_tls_offset = -1,
 269            lmf_tls_offset = -1,
 270            thread_tls_offset = -1;
 271
 272 pthread_key_t lmf_addr_key;
 273
 274 gboolean lmf_addr_key_inited = FALSE;
 275
 276 #if 0
 277
 278 extern __thread MonoDomain *tls_appdomain;
 279 extern __thread MonoThread *tls_current_object;
 280 extern __thread gpointer   mono_lmf_addr;
 281
 282 #endif
 283
 284 /*====================== End of Global Variables ===================*/
 285
 286 /*------------------------------------------------------------------*/
 287 /*                                                                  */
 288 /* Name         - mono_arch_regname                                 */
 289 /*                                                                  */
 290 /* Function     - Returns the name of the register specified by     */
 291 /*                the input parameter.                              */
 292 /*                                                                  */
 293 /*------------------------------------------------------------------*/
 294
 295 const char*
 296 mono_arch_regname (int reg) {
 297         static const char * rnames[] = {
 298                 "s390_r0", "s390_sp", "s390_r2", "s390_r3", "s390_r4",
 299                 "s390_r5", "s390_r6", "s390_r7", "s390_r8", "s390_r9",
 300                 "s390_r10", "s390_r11", "s390_r12", "s390_r13", "s390_r14",
 301                 "s390_r15"
 302         };
 303
 304         if (reg >= 0 && reg < 16)
 305                 return rnames [reg];
 306         else
 307                 return "unknown";
 308 }
 309
 310 /*========================= End of Function ========================*/
 311
 312 /*------------------------------------------------------------------*/
 313 /*                                                                  */
 314 /* Name         - mono_arch_fregname                                */
 315 /*                                                                  */
 316 /* Function     - Returns the name of the register specified by     */
 317 /*                the input parameter.                              */
 318 /*                                                                  */
 319 /*------------------------------------------------------------------*/
 320
 321 const char*
 322 mono_arch_fregname (int reg) {
 323         static const char * rnames[] = {
 324                 "s390_f0", "s390_f1", "s390_f2", "s390_f3", "s390_f4",
 325                 "s390_f5", "s390_f6", "s390_f7", "s390_f8", "s390_f9",
 326                 "s390_f10", "s390_f11", "s390_f12", "s390_f13", "s390_f14",
 327                 "s390_f15"
 328         };
 329
 330         if (reg >= 0 && reg < 16)
 331                 return rnames [reg];
 332         else
 333                 return "unknown";
 334 }
 335
 336 /*========================= End of Function ========================*/
 337
 338 /*------------------------------------------------------------------*/
 339 /*                                                                  */
 340 /* Name         - arch_get_argument_info                            */
 341 /*                                                                  */
 342 /* Function     - Gathers information on parameters such as size,   */
 343 /*                alignment, and padding. arg_info should be large  */
 344 /*                enough to hold param_count + 1 entries.           */
 345 /*                                                                  */
 346 /* Parameters   - @csig - Method signature                          */
 347 /*                @param_count - No. of parameters to consider      */
 348 /*                @arg_info - An array to store the result info     */
 349 /*                                                                  */
 350 /* Returns      - Size of the activation frame                      */
 351 /*                                                                  */
 352 /*------------------------------------------------------------------*/
 353
 354 int
 355 mono_arch_get_argument_info (MonoMethodSignature *csig,
 356                              int param_count,
 357                              MonoJitArgumentInfo *arg_info)
 358 {
 359         int k, frame_size = 0;
 360         int size, align, pad;
 361         int offset = 8;
 362
 363         if (MONO_TYPE_ISSTRUCT (csig->ret)) {
 364                 frame_size += sizeof (gpointer);
 365                 offset += 4;
 366         }
 367
 368         arg_info [0].offset = offset;
 369
 370         if (csig->hasthis) {
 371                 frame_size += sizeof (gpointer);
 372                 offset += 4;
 373         }
 374
 375         arg_info [0].size = frame_size;
 376
 377         for (k = 0; k < param_count; k++) {
 378
 379                 if (csig->pinvoke)
 380                         size = mono_type_native_stack_size (csig->params [k], &align);
 381                 else
 382                         size = mini_type_stack_size (NULL, csig->params [k], &align);
 383
 384                 frame_size += pad = (align - (frame_size & (align - 1))) & (align - 1);
 385                 arg_info [k].pad = pad;
 386                 frame_size += size;
 387                 arg_info [k + 1].pad = 0;
 388                 arg_info [k + 1].size = size;
 389                 offset += pad;
 390                 arg_info [k + 1].offset = offset;
 391                 offset += size;
 392         }
 393
 394         align = MONO_ARCH_FRAME_ALIGNMENT;
 395         frame_size += pad = (align - (frame_size & (align - 1))) & (align - 1);
 396         arg_info [k].pad = pad;
 397
 398         return frame_size;
 399 }
 400
 401 /*========================= End of Function ========================*/
 402
 403 /*------------------------------------------------------------------*/
 404 /*                                                                  */
 405 /* Name         - retFitsInReg.                                     */
 406 /*                                                                  */
 407 /* Function     - Determines if a value can be returned in one or   */
 408 /*                two registers.                                    */
 409 /*                                                                  */
 410 /*------------------------------------------------------------------*/
 411
 412 static inline gboolean
 413 retFitsInReg(guint32 size)
 414 {
 415         switch (size) {
 416                 case 0:
 417                 case 1:
 418                 case 2:
 419                 case 4:
 420                 case 8:
 421                         return (TRUE);
 422                 break;
 423                 default:
 424                         return (FALSE);
 425         }
 426 }
 427
 428 /*========================= End of Function ========================*/
 429
 430 /*------------------------------------------------------------------*/
 431 /*                                                                  */
 432 /* Name         - backStackPtr.                                     */
 433 /*                                                                  */
 434 /* Function     - Restore Stack Pointer to previous frame.          */
 435 /*                                                                  */
 436 /*------------------------------------------------------------------*/
 437
 438 static inline guint8 *
 439 backUpStackPtr(MonoCompile *cfg, guint8 *code, gint framePtr)
 440 {
 441         int stackSize = cfg->stack_usage;
 442
 443         if (s390_is_uimm16 (cfg->stack_usage)) {
 444                 s390_ahi  (code, framePtr, cfg->stack_usage);
 445         } else {
 446                 while (stackSize > 32767) {
 447                         s390_ahi  (code, framePtr, 32767);
 448                         stackSize -= 32767;
 449                 }
 450                 s390_ahi  (code, framePtr, stackSize);
 451         }
 452         return (code);
 453 }
 454
 455 /*========================= End of Function ========================*/
 456
 457 /*------------------------------------------------------------------*/
 458 /*                                                                  */
 459 /* Name         - indent                                            */
 460 /*                                                                  */
 461 /* Function     - Perform nice indenting to current level           */
 462 /*                                                                  */
 463 /*------------------------------------------------------------------*/
 464
 465 static void
 466 indent (int diff) {
 467         int v;
 468         if (diff < 0)
 469                 indent_level += diff;
 470         v = indent_level;
 471         printf("[%3d] ",v);
 472         while (v-- > 0) {
 473                 printf (". ");
 474         }
 475         if (diff > 0)
 476                 indent_level += diff;
 477 }
 478
 479 /*========================= End of Function ========================*/
 480
 481 /*------------------------------------------------------------------*/
 482 /*                                                                  */
 483 /* Name         - decodeParm                                        */
 484 /*                                                                  */
 485 /* Function     - Decode a parameter for the trace.                 */
 486 /*                                                                  */
 487 /*------------------------------------------------------------------*/
 488
 489 static void
 490 decodeParm(MonoType *type, void *curParm, int size)
 491 {
 492         guint32 simpleType;
 493
 494         if (type->byref) {
 495                 printf("[BYREF:%p], ", *((char **) curParm));
 496         } else {
 497                 simpleType = mono_type_get_underlying_type(type)->type;
 498 enum_parmtype:
 499                 switch (simpleType) {
 500                         case MONO_TYPE_I :
 501                                 printf ("[INTPTR:%p], ", *((int **) curParm));
 502                                 break;
 503                         case MONO_TYPE_U :
 504                                 printf ("[UINTPTR:%p], ", *((int **) curParm));
 505                                 break;
 506                         case MONO_TYPE_BOOLEAN :
 507                                 printf ("[BOOL:%d], ", *((int *) curParm));
 508                                 break;
 509                         case MONO_TYPE_CHAR :
 510                                 printf ("[CHAR:%c], ", *((int *) curParm));
 511                                 break;
 512                         case MONO_TYPE_I1 :
 513                                 printf ("[INT1:%d], ", *((int *) curParm));
 514                                 break;
 515                         case MONO_TYPE_I2 :
 516                                 printf ("[INT2:%d], ", *((int *) curParm));
 517                                 break;
 518                         case MONO_TYPE_I4 :
 519                                 printf ("[INT4:%d], ", *((int *) curParm));
 520                                 break;
 521                         case MONO_TYPE_U1 :
 522                                 printf ("[UINT1:%u], ", *((unsigned int *) curParm));
 523                                 break;
 524                         case MONO_TYPE_U2 :
 525                                 printf ("[UINT2:%u], ", *((guint16 *) curParm));
 526                                 break;
 527                         case MONO_TYPE_U4 :
 528                                 printf ("[UINT4:%u], ", *((guint32 *) curParm));
 529                                 break;
 530                         case MONO_TYPE_U8 :
 531                                 printf ("[UINT8:%llu], ", *((guint64 *) curParm));
 532                                 break;
 533                         case MONO_TYPE_STRING : {
 534                                 MonoString *s = *((MonoString **) curParm);
 535                                 if (s) {
 536                                         g_assert (((MonoObject *) s)->vtable->klass == mono_defaults.string_class);
 537                                         printf("[STRING:%p:%s], ", s, mono_string_to_utf8(s));
 538                                 } else {
 539                                         printf("[STRING:null], ");
 540                                 }
 541                                 break;
 542                         }
 543                         case MONO_TYPE_CLASS :
 544                         case MONO_TYPE_OBJECT : {
 545                                 MonoObject *obj = *((MonoObject **) curParm);
 546                                 MonoClass *class;
 547                                 if ((obj) && (obj->vtable)) {
 548                                         printf("[CLASS/OBJ:");
 549                                         class = obj->vtable->klass;
 550                                         printf("%p [%p] ",obj,curParm);
 551 //                                      if (class == mono_defaults.string_class) {
 552 //                                              printf("[STRING:%p:%s]",
 553 //                                                     *obj, mono_string_to_utf8 (obj));
 554 //                                      } else if (class == mono_defaults.int32_class) {
 555 //                                              printf("[INT32:%p:%d]",
 556 //                                                      obj, *(gint32 *)((char *)obj + sizeof (MonoObject)));
 557 //                                      } else
 558 //                                              printf("[%s.%s:%p]",
 559 //                                                     class->name_space, class->name, obj);
 560                                         printf("], ");
 561                                 } else {
 562                                         printf("[OBJECT:null], ");
 563                                 }
 564                                 break;
 565                         }
 566                         case MONO_TYPE_PTR :
 567                                 printf("[PTR:%p], ", *((gpointer **) (curParm)));
 568                                 break;
 569                         case MONO_TYPE_FNPTR :
 570                                 printf("[FNPTR:%p], ", *((gpointer **) (curParm)));
 571                                 break;
 572                         case MONO_TYPE_ARRAY :
 573                                 printf("[ARRAY:%p], ", *((gpointer **) (curParm)));
 574                                 break;
 575                         case MONO_TYPE_SZARRAY :
 576                                 printf("[SZARRAY:%p], ", *((gpointer **) (curParm)));
 577                                 break;
 578                         case MONO_TYPE_I8 :
 579                                 printf("[INT8:%lld], ", *((gint64 *) (curParm)));
 580                                 break;
 581                         case MONO_TYPE_R4 :
 582                                 printf("[FLOAT4:%g], ", *((double *) (curParm)));
 583                                 break;
 584                         case MONO_TYPE_R8 :
 585                                 printf("[FLOAT8:%g], ", *((double *) (curParm)));
 586                                 break;
 587                         case MONO_TYPE_VALUETYPE : {
 588                                 int i;
 589                                 MonoMarshalType *info;
 590
 591                                 if (type->data.klass->enumtype) {
 592                                         simpleType = type->data.klass->enum_basetype->type;
 593                                         printf("{VALUETYPE} - ");
 594                                         goto enum_parmtype;
 595                                 }
 596
 597                                 info = mono_marshal_load_type_info (type->data.klass);
 598
 599                                 if ((info->native_size == sizeof(float)) &&
 600                                     (info->num_fields  == 1) &&
 601                                     (info->fields[0].field->type->type == MONO_TYPE_R4)) {
 602                                                 printf("[FLOAT4:%f], ", *((float *) (curParm)));
 603                                         break;
 604                                 }
 605
 606                                 if ((info->native_size == sizeof(double)) &&
 607                                     (info->num_fields  == 1) &&
 608                                     (info->fields[0].field->type->type == MONO_TYPE_R8)) {
 609                                         printf("[FLOAT8:%g], ", *((double *) (curParm)));
 610                                         break;
 611                                 }
 612
 613                                 printf("[VALUETYPE:");
 614                                 for (i = 0; i < size; i++)
 615                                         printf("%02x,", *((guint8 *)curParm+i));
 616                                 printf("]");
 617                                 break;
 618                         }
 619                         case MONO_TYPE_TYPEDBYREF: {
 620                                 int i;
 621                                 printf("[TYPEDBYREF:");
 622                                 for (i = 0; i < size; i++)
 623                                         printf("%02x,", *((guint8 *)curParm+i));
 624                                 printf("]");
 625                                 break;
 626                         }
 627                         default :
 628                                 printf("[?? - %d], ",simpleType);
 629                 }
 630         }
 631 }
 632
 633 /*========================= End of Function ========================*/
 634
 635 static int lc = 0;
 636 /*------------------------------------------------------------------*/
 637 /*                                                                  */
 638 /* Name         - enter_method                                      */
 639 /*                                                                  */
 640 /* Function     - Perform tracing of the entry to the current       */
 641 /*                method.                                           */
 642 /*                                                                  */
 643 /*------------------------------------------------------------------*/
 644
 645 static void
 646 enter_method (MonoMethod *method, RegParm *rParm, char *sp)
 647 {
 648         int i, oParm = 0, iParm = 0;
 649         MonoObject *obj;
 650         MonoMethodSignature *sig;
 651         char *fname;
 652         guint32 ip;
 653         CallInfo *cinfo;
 654         ArgInfo *ainfo;
 655         size_data sz;
 656         void *curParm;
 657
 658         fname = mono_method_full_name (method, TRUE);
 659         indent (1);
 660         printf ("ENTER: %s(", fname);
 661         g_free (fname);
 662
 663         ip  = (*(guint32 *) (sp+S390_RET_ADDR_OFFSET)) & 0x7fffffff;
 664         printf (") ip: %p sp: %p - ", (gpointer) ip, sp);
 665
 666         if (rParm == NULL)
 667                 return;
 668
 669         sig = mono_method_signature (method);
 670
 671         cinfo = calculate_sizes (NULL, sig, &sz, sig->pinvoke);
 672
 673         if (cinfo->struct_ret) {
 674                 printf ("[STRUCTRET:%p], ", (gpointer) rParm->gr[0]);
 675                 iParm = 1;
 676         }
 677
 678         if (sig->hasthis) {
 679                 gpointer *this = (gpointer *) rParm->gr[iParm];
 680                 obj = (MonoObject *) this;
 681                 if (method->klass->valuetype) {
 682                         if (obj) {
 683                                 printf("this:[value:%p:%08x], ",
 684                                        this, *((guint32 *)(this+sizeof(MonoObject))));
 685                         } else
 686                                 printf ("this:[NULL], ");
 687                 } else {
 688                         if (obj) {
 689 //                              class = obj->vtable->klass;
 690 //                              if (class == mono_defaults.string_class) {
 691 //                                      printf ("this:[STRING:%p:%s], ",
 692 //                                              obj, mono_string_to_utf8 ((MonoString *)obj));
 693 //                              } else {
 694 //                                      printf ("this:%p[%s.%s], ",
 695 //                                              obj, class->name_space, class->name);
 696 //                              }
 697 printf("this:%p, ",obj);
 698                         } else
 699                                 printf ("this:NULL, ");
 700                 }
 701                 oParm++;
 702         }
 703
 704         for (i = 0; i < sig->param_count; ++i) {
 705                 ainfo = &cinfo->args[i + oParm];
 706                 switch (ainfo->regtype) {
 707                         case RegTypeGeneral :
 708                                 decodeParm(sig->params[i], &(rParm->gr[ainfo->reg-2]), ainfo->size);
 709                                 break;
 710                         case RegTypeFP :
 711                                 decodeParm(sig->params[i], &(rParm->fp[ainfo->reg]), ainfo->size);
 712                                 break;
 713                         case RegTypeBase :
 714                                 decodeParm(sig->params[i], sp+ainfo->offset, ainfo->size);
 715                                 break;
 716                         case RegTypeStructByVal :
 717                                 if (ainfo->reg != STK_BASE)
 718                                         curParm = &(rParm->gr[ainfo->reg-2]);
 719                                 else
 720                                         curParm = sp+ainfo->offset;
 721
 722                                 if (retFitsInReg (ainfo->vtsize))
 723                                         decodeParm(sig->params[i],
 724                                                    curParm,
 725                                                    ainfo->size);
 726                                 else
 727                                         decodeParm(sig->params[i],
 728                                                    *((char **) curParm),
 729                                                    ainfo->vtsize);
 730                                 break;
 731                         case RegTypeStructByAddr :
 732                                 if (ainfo->reg != STK_BASE)
 733                                         curParm = &(rParm->gr[ainfo->reg-2]);
 734                                 else
 735                                         curParm = sp+ainfo->offset;
 736
 737                                 decodeParm(sig->params[i],
 738                                            *((char **) curParm),
 739                                            ainfo->vtsize);
 740                                 break;
 741
 742                         default :
 743                                 printf("???, ");
 744                 }
 745         }
 746         printf("\n");
 747         g_free(cinfo);
 748 }
 749
 750 /*========================= End of Function ========================*/
 751
 752 /*------------------------------------------------------------------*/
 753 /*                                                                  */
 754 /* Name         - leave_method                                      */
 755 /*                                                                  */
 756 /* Function     -                                                   */
 757 /*                                                                  */
 758 /*------------------------------------------------------------------*/
 759
 760 static void
 761 leave_method (MonoMethod *method, ...)
 762 {
 763         MonoType *type;
 764         char *fname;
 765         guint32 ip;
 766         va_list ap;
 767
 768         va_start(ap, method);
 769
 770         fname = mono_method_full_name (method, TRUE);
 771         indent (-1);
 772         printf ("LEAVE: %s", fname);
 773         g_free (fname);
 774
 775         type = mono_method_signature (method)->ret;
 776
 777 handle_enum:
 778         switch (type->type) {
 779         case MONO_TYPE_VOID:
 780                 break;
 781         case MONO_TYPE_BOOLEAN: {
 782                 int val = va_arg (ap, int);
 783                 if (val)
 784                         printf ("[TRUE:%d]", val);
 785                 else
 786                         printf ("[FALSE]");
 787
 788                 break;
 789         }
 790         case MONO_TYPE_CHAR: {
 791                 int val = va_arg (ap, int);
 792                 printf ("[CHAR:%d]", val);
 793                 break;
 794         }
 795         case MONO_TYPE_I1: {
 796                 int val = va_arg (ap, int);
 797                 printf ("[INT1:%d]", val);
 798                 break;
 799         }
 800         case MONO_TYPE_U1: {
 801                 int val = va_arg (ap, int);
 802                 printf ("[UINT1:%d]", val);
 803                 break;
 804         }
 805         case MONO_TYPE_I2: {
 806                 int val = va_arg (ap, int);
 807                 printf ("[INT2:%d]", val);
 808                 break;
 809         }
 810         case MONO_TYPE_U2: {
 811                 int val = va_arg (ap, int);
 812                 printf ("[UINT2:%d]", val);
 813                 break;
 814         }
 815         case MONO_TYPE_I4: {
 816                 int val = va_arg (ap, int);
 817                 printf ("[INT4:%d]", val);
 818                 break;
 819         }
 820         case MONO_TYPE_U4: {
 821                 int val = va_arg (ap, int);
 822                 printf ("[UINT4:%d]", val);
 823                 break;
 824         }
 825         case MONO_TYPE_I: {
 826                 int val = va_arg (ap, int);
 827                 printf ("[INT:%d]", val);
 828                 printf("]");
 829                 break;
 830         }
 831         case MONO_TYPE_U: {
 832                 int val = va_arg (ap, int);
 833                 printf ("[UINT:%d]", val);
 834                 printf("]");
 835                 break;
 836         }
 837         case MONO_TYPE_STRING: {
 838                 MonoString *s = va_arg (ap, MonoString *);
 839 ;
 840                 if (s) {
 841                         g_assert (((MonoObject *)s)->vtable->klass == mono_defaults.string_class);
 842                         printf ("[STRING:%p:%s]", s, mono_string_to_utf8 (s));
 843                 } else
 844                         printf ("[STRING:null], ");
 845                 break;
 846         }
 847         case MONO_TYPE_CLASS:
 848         case MONO_TYPE_OBJECT: {
 849                 MonoObject *o = va_arg (ap, MonoObject *);
 850
 851 //              if ((o) && (o->vtable)) {
 852 //                      if (o->vtable->klass == mono_defaults.boolean_class) {
 853 //                              printf ("[BOOLEAN:%p:%d]", o, *((guint8 *)o + sizeof (MonoObject)));
 854 //                      } else if  (o->vtable->klass == mono_defaults.int32_class) {
 855 //                              printf ("[INT32:%p:%d]", o, *((gint32 *)((char *)o + sizeof (MonoObject))));
 856 //                      } else if  (o->vtable->klass == mono_defaults.int64_class) {
 857 //                              printf ("[INT64:%p:%lld]", o, *((gint64 *)((char *)o + sizeof (MonoObject))));
 858 //                      } else
 859 //                              printf ("[%s.%s:%p]", o->vtable->klass->name_space, o->vtable->klass->name, o);
 860 //              } else
 861                         printf ("[OBJECT:%p]", o);
 862
 863                 break;
 864         }
 865         case MONO_TYPE_PTR:
 866         case MONO_TYPE_FNPTR:
 867         case MONO_TYPE_ARRAY:
 868         case MONO_TYPE_SZARRAY: {
 869                 gpointer p = va_arg (ap, gpointer);
 870                 printf ("[result=%p]", p);
 871                 break;
 872         }
 873         case MONO_TYPE_I8: {
 874                 gint64 l =  va_arg (ap, gint64);
 875                 printf ("[LONG:%lld]", l);
 876                 break;
 877         }
 878         case MONO_TYPE_U8: {
 879                 guint64 l =  va_arg (ap, guint64);
 880                 printf ("[ULONG:%llu]", l);
 881                 break;
 882         }
 883         case MONO_TYPE_R4: {
 884                 double f;
 885                 f = va_arg (ap, double);
 886                 printf ("[FLOAT4:%g]\n", f);
 887                 break;
 888         }
 889         case MONO_TYPE_R8: {
 890                 double f = va_arg (ap, double);
 891                 printf ("[FLOAT8:%g]\n", f);
 892                 break;
 893         }
 894         case MONO_TYPE_VALUETYPE: {
 895                 MonoMarshalType *info;
 896                 if (type->data.klass->enumtype) {
 897                         type = type->data.klass->enum_basetype;
 898                         goto handle_enum;
 899                 } else {
 900                         guint8 *p = va_arg (ap, gpointer);
 901                         int j, size, align;
 902
 903                         info = mono_marshal_load_type_info (type->data.klass);
 904
 905                         if ((info->native_size == sizeof(float)) &&
 906                             (info->num_fields  == 1) &&
 907                             (info->fields[0].field->type->type == MONO_TYPE_R4)) {
 908                                 double f = va_arg (ap, double);
 909                                 printf("[FLOAT4:%g]\n", (double) f);
 910                                 break;
 911                         }
 912
 913                         if ((info->native_size == sizeof(double)) &&
 914                             (info->num_fields  == 1) &&
 915                             (info->fields[0].field->type->type == MONO_TYPE_R8)) {
 916                                 double f = va_arg (ap, double);
 917                                 printf("[FLOAT8:%g]\n", f);
 918                                 break;
 919                         }
 920
 921                         size = mono_type_size (type, &align);
 922                         switch (size) {
 923                         case 1:
 924                         case 2:
 925                         case 4:
 926                         case 8:
 927                                 printf ("[");
 928                                 for (j = 0; p && j < size; j++)
 929                                         printf ("%02x,", p [j]);
 930                                 printf ("]\n");
 931                                 break;
 932                         default:
 933                                 printf ("[VALUERET]\n");
 934                         }
 935                 }
 936                 break;
 937         }
 938         case MONO_TYPE_TYPEDBYREF: {
 939                 guint8 *p = va_arg (ap, gpointer);
 940                 int j, size, align;
 941                 size = mono_type_size (type, &align);
 942                 switch (size) {
 943                 case 1:
 944                 case 2:
 945                 case 4:
 946                 case 8:
 947                         printf ("[");
 948                         for (j = 0; p && j < size; j++)
 949                                 printf ("%02x,", p [j]);
 950                         printf ("]\n");
 951                         break;
 952                 default:
 953                         printf ("[TYPEDBYREF]\n");
 954                 }
 955         }
 956                 break;
 957         default:
 958                 printf ("(unknown return type %x)",
 959                         mono_method_signature (method)->ret->type);
 960         }
 961
 962         ip = ((gint32) __builtin_return_address (0)) & 0x7fffffff;
 963         printf (" ip: %p\n", (gpointer) ip);
 964 }
 965
 966 /*========================= End of Function ========================*/
 967
 968 /*------------------------------------------------------------------*/
 969 /*                                                                  */
 970 /* Name         - mono_arch_cpu_init                                */
 971 /*                                                                  */
 972 /* Function     - Perform CPU specific initialization to execute    */
 973 /*                managed code.                                     */
 974 /*                                                                  */
 975 /*------------------------------------------------------------------*/
 976
 977 void
 978 mono_arch_cpu_init (void)
 979 {
 980         guint mode = 1;
 981
 982         /*--------------------------------------*/
 983         /* Set default rounding mode for FP     */
 984         /*--------------------------------------*/
 985         __asm__ ("SRNM\t%0\n\t"
 986                 : : "m" (mode));
 987 }
 988
 989 /*========================= End of Function ========================*/
 990
 991
 992 /*
 993  * Initialize architecture specific code.
 994  */
 995 void
 996 mono_arch_init (void)
 997 {
 998 }
 999
1000 /*
1001  * Cleanup architecture specific code.
1002  */
1003 void
1004 mono_arch_cleanup (void)
1005 {
1006 }
1007
1008 /*------------------------------------------------------------------*/
1009 /*                                                                  */
1010 /* Name         - mono_arch_cpu_optimizazions                       */
1011 /*                                                                  */
1012 /* Function     - Returns the optimizations supported on this CPU   */
1013 /*                                                                  */
1014 /*------------------------------------------------------------------*/
1015
1016 guint32
1017 mono_arch_cpu_optimizazions (guint32 *exclude_mask)
1018 {
1019         guint32 opts = 0;
1020
1021         /*----------------------------------------------------------*/
1022         /* no s390-specific optimizations yet                       */
1023         /*----------------------------------------------------------*/
1024         *exclude_mask = MONO_OPT_INLINE|MONO_OPT_LINEARS;
1025 //      *exclude_mask = MONO_OPT_INLINE;
1026         return opts;
1027 }
1028
1029 /*========================= End of Function ========================*/
1030
1031 /*------------------------------------------------------------------*/
1032 /*                                                                  */
1033 /* Name         -                                                   */
1034 /*                                                                  */
1035 /* Function     -                                                   */
1036 /*                                                                  */
1037 /*------------------------------------------------------------------*/
1038
1039 static gboolean
1040 is_regsize_var (MonoType *t) {
1041         if (t->byref)
1042                 return TRUE;
1043         switch (mono_type_get_underlying_type (t)->type) {
1044         case MONO_TYPE_I4:
1045         case MONO_TYPE_U4:
1046         case MONO_TYPE_I:
1047         case MONO_TYPE_U:
1048         case MONO_TYPE_PTR:
1049         case MONO_TYPE_FNPTR:
1050                 return TRUE;
1051         case MONO_TYPE_OBJECT:
1052         case MONO_TYPE_STRING:
1053         case MONO_TYPE_CLASS:
1054         case MONO_TYPE_SZARRAY:
1055         case MONO_TYPE_ARRAY:
1056                 return FALSE;
1057         case MONO_TYPE_VALUETYPE:
1058                 if (t->data.klass->enumtype)
1059                         return is_regsize_var (t->data.klass->enum_basetype);
1060                 return FALSE;
1061         }
1062         return FALSE;
1063 }
1064
1065 /*========================= End of Function ========================*/
1066
1067 /*------------------------------------------------------------------*/
1068 /*                                                                  */
1069 /* Name         - mono_arch_get_allocatable_int_vars                */
1070 /*                                                                  */
1071 /* Function     -                                                   */
1072 /*                                                                  */
1073 /*------------------------------------------------------------------*/
1074
1075 GList *
1076 mono_arch_get_allocatable_int_vars (MonoCompile *cfg)
1077 {
1078         GList *vars = NULL;
1079         int i;
1080
1081         for (i = 0; i < cfg->num_varinfo; i++) {
1082                 MonoInst *ins = cfg->varinfo [i];
1083                 MonoMethodVar *vmv = MONO_VARINFO (cfg, i);
1084
1085                 /* unused vars */
1086                 if (vmv->range.first_use.abs_pos >= vmv->range.last_use.abs_pos)
1087                         continue;
1088
1089                 if (ins->flags & (MONO_INST_VOLATILE|MONO_INST_INDIRECT) ||
1090                     (ins->opcode != OP_LOCAL && ins->opcode != OP_ARG))
1091                         continue;
1092
1093                 /* we can only allocate 32 bit values */
1094                 if (is_regsize_var (ins->inst_vtype)) {
1095                         g_assert (MONO_VARINFO (cfg, i)->reg == -1);
1096                         g_assert (i == vmv->idx);
1097                         vars = mono_varlist_insert_sorted (cfg, vars, vmv, FALSE);
1098                 }
1099         }
1100
1101         return vars;
1102 }
1103
1104 /*========================= End of Function ========================*/
1105
1106 /*------------------------------------------------------------------*/
1107 /*                                                                  */
1108 /* Name         - mono_arch_global_int_regs                         */
1109 /*                                                                  */
1110 /* Function     - Return a list of usable integer registers.        */
1111 /*                                                                  */
1112 /*------------------------------------------------------------------*/
1113
1114 GList *
1115 mono_arch_get_global_int_regs (MonoCompile *cfg)
1116 {
1117         GList *regs = NULL;
1118         MonoMethodHeader *header;
1119         int i, top = 13;
1120
1121         header = mono_method_get_header (cfg->method);
1122         if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
1123                 cfg->frame_reg = s390_r11;
1124
1125         for (i = 8; i < top; ++i) {
1126                 if (cfg->frame_reg != i)
1127                         regs = g_list_prepend (regs, GUINT_TO_POINTER (i));
1128         }
1129
1130         return regs;
1131 }
1132
1133 /*========================= End of Function ========================*/
1134
1135 /*------------------------------------------------------------------*/
1136 /*                                                                  */
1137 /* Name         -  mono_arch_flush_icache                           */
1138 /*                                                                  */
1139 /* Function     -  Flush the CPU icache.                            */
1140 /*                                                                  */
1141 /*------------------------------------------------------------------*/
1142
1143 void
1144 mono_arch_flush_icache (guint8 *code, gint size)
1145 {
1146 }
1147
1148 /*========================= End of Function ========================*/
1149
1150 /*------------------------------------------------------------------*/
1151 /*                                                                  */
1152 /* Name         - add_general                                       */
1153 /*                                                                  */
1154 /* Function     - Determine code and stack size incremements for a  */
1155 /*                parameter.                                        */
1156 /*                                                                  */
1157 /*------------------------------------------------------------------*/
1158
1159 static void inline
1160 add_general (guint *gr, size_data *sz, ArgInfo *ainfo, gboolean simple)
1161 {
1162         int disp;
1163
1164         if (simple) {
1165                 if (*gr > S390_LAST_ARG_REG) {
1166                         sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1167                         ainfo->offset   = sz->stack_size;
1168                         ainfo->reg      = STK_BASE;
1169                         ainfo->regtype  = RegTypeBase;
1170                         sz->stack_size += sizeof(int);
1171                         sz->local_size += sizeof(int);
1172                         sz->offStruct  += sizeof(int);
1173                         sz->code_size  += 12;
1174                 } else {
1175                         ainfo->reg      = *gr;
1176                         sz->code_size  += 8;
1177                 }
1178         } else {
1179                 if (*gr > S390_LAST_ARG_REG - 1) {
1180                         disp            = sz->stack_size;
1181                         sz->stack_size  = S390_ALIGN(sz->stack_size, S390_STACK_ALIGNMENT);
1182                         disp            = sz->stack_size - disp;
1183                         ainfo->offset   = sz->stack_size;
1184                         ainfo->reg      = STK_BASE;
1185                         ainfo->regtype  = RegTypeBase;
1186                         sz->stack_size += sizeof(long long);
1187                         sz->local_size += (sizeof(long long) + disp);
1188                         sz->offStruct  += (sizeof(long long) + disp);
1189                         sz->code_size  += 10;
1190                 } else {
1191                         ainfo->reg      = *gr;
1192                         sz->code_size  += 8;
1193                 }
1194                 (*gr) ++;
1195         }
1196         (*gr) ++;
1197 }
1198
1199 /*========================= End of Function ========================*/
1200
1201 /*------------------------------------------------------------------*/
1202 /*                                                                  */
1203 /* Name         - add_stackParm                                     */
1204 /*                                                                  */
1205 /* Function     - Determine code and stack size incremements for a  */
1206 /*                parameter.                                        */
1207 /*                                                                  */
1208 /*------------------------------------------------------------------*/
1209
1210 static void inline
1211 add_stackParm (guint *gr, size_data *sz, ArgInfo *ainfo, gint size)
1212 {
1213         if (*gr > S390_LAST_ARG_REG) {
1214                 sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1215                 ainfo->reg      = STK_BASE;
1216                 sz->parm_size  += sizeof(gpointer);
1217                 sz->offStruct  += sizeof(gpointer);
1218         } else {
1219                 ainfo->reg      = *gr;
1220         }
1221         (*gr) ++;
1222         ainfo->offset   = sz->stack_size;
1223         ainfo->offparm  = sz->offset;
1224         sz->offset      = S390_ALIGN(sz->offset+size, sizeof(long));
1225         ainfo->size     = size;
1226         ainfo->regtype  = RegTypeStructByAddr;
1227         ainfo->vtsize   = size;
1228         sz->parm_size  += size;
1229 }
1230
1231 /*========================= End of Function ========================*/
1232
1233 /*------------------------------------------------------------------*/
1234 /*                                                                  */
1235 /* Name         - add_float                                         */
1236 /*                                                                  */
1237 /* Function     - Determine code and stack size incremements for a  */
1238 /*                float parameter.                                  */
1239 /*                                                                  */
1240 /*------------------------------------------------------------------*/
1241
1242 static void inline
1243 add_float (guint *fr,  size_data *sz, ArgInfo *ainfo)
1244 {
1245         if ((*fr) <= S390_LAST_FPARG_REG) {
1246                 ainfo->regtype = RegTypeFP;
1247                 ainfo->reg     = *fr;
1248                 sz->code_size += 4;
1249                 (*fr) += 2;
1250         }
1251         else {
1252                 ainfo->offset   = sz->stack_size;
1253                 ainfo->reg      = STK_BASE;
1254                 ainfo->regtype  = RegTypeBase;
1255                 sz->code_size  += 4;
1256                 sz->stack_size += ainfo->size;
1257                 sz->local_size += ainfo->size;
1258                 sz->offStruct  += ainfo->size;
1259         }
1260 }
1261
1262 /*========================= End of Function ========================*/
1263
1264 /*------------------------------------------------------------------*/
1265 /*                                                                  */
1266 /* Name         - calculate_sizes                                   */
1267 /*                                                                  */
1268 /* Function     - Determine the amount of space required for code   */
1269 /*                and stack. In addition determine starting points  */
1270 /*                for stack-based parameters, and area for struct-  */
1271 /*                ures being returned on the stack.                 */
1272 /*                                                                  */
1273 /*------------------------------------------------------------------*/
1274
1275 static CallInfo *
1276 calculate_sizes (MonoCompile *cfg, MonoMethodSignature *sig, size_data *sz,
1277                  gboolean string_ctor)
1278 {
1279         guint i, fr, gr, size;
1280         int nParm = sig->hasthis + sig->param_count;
1281         MonoType *ret_type;
1282         guint32 simpletype, align;
1283         CallInfo *cinfo = g_malloc0 (sizeof (CallInfo) + sizeof (ArgInfo) * nParm);
1284         MonoGenericSharingContext *gsctx = cfg ? cfg->generic_sharing_context : NULL;
1285
1286         fr                = 0;
1287         gr                = s390_r2;
1288         nParm             = 0;
1289         cinfo->struct_ret = 0;
1290         sz->offset        = 0;
1291         sz->offStruct     = S390_MINIMAL_STACK_SIZE;
1292         sz->retStruct     = 0;
1293         sz->stack_size    = S390_MINIMAL_STACK_SIZE;
1294         sz->code_size     = 0;
1295         sz->parm_size     = 0;
1296         sz->local_size    = 0;
1297
1298         /*----------------------------------------------------------*/
1299         /* We determine the size of the return code/stack in case we*/
1300         /* need to reserve a register to be used to address a stack */
1301         /* area that the callee will use.                           */
1302         /*----------------------------------------------------------*/
1303
1304         ret_type = mono_type_get_underlying_type (sig->ret);
1305         ret_type = mini_get_basic_type_from_generic (gsctx, ret_type);
1306         simpletype = ret_type->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                 MonoType *ptype;
1392
1393                 /*--------------------------------------------------*/
1394                 /* Handle vararg type calls. All args are put on    */
1395                 /* the stack.                                       */
1396                 /*--------------------------------------------------*/
1397                 if ((sig->call_convention == MONO_CALL_VARARG) &&
1398                     (i == sig->sentinelpos)) {
1399                         gr = S390_LAST_ARG_REG + 1;
1400                         add_general (&gr, sz, &cinfo->sigCookie, TRUE);
1401                 }
1402
1403                 if (sig->params [i]->byref) {
1404                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1405                         cinfo->args[nParm].size = sizeof(gpointer);
1406                         nParm++;
1407                         continue;
1408                 }
1409
1410                 ptype = mono_type_get_underlying_type (sig->params [i]);
1411                 ptype = mini_get_basic_type_from_generic (gsctx, ptype);
1412                 simpletype = ptype->type;
1413                 switch (simpletype) {
1414                 case MONO_TYPE_BOOLEAN:
1415                 case MONO_TYPE_I1:
1416                 case MONO_TYPE_U1:
1417                         cinfo->args[nParm].size = sizeof(char);
1418                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1419                         nParm++;
1420                         break;
1421                 case MONO_TYPE_I2:
1422                 case MONO_TYPE_U2:
1423                 case MONO_TYPE_CHAR:
1424                         cinfo->args[nParm].size = sizeof(short);
1425                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1426                         nParm++;
1427                         break;
1428                 case MONO_TYPE_I4:
1429                 case MONO_TYPE_U4:
1430                         cinfo->args[nParm].size = sizeof(int);
1431                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1432                         nParm++;
1433                         break;
1434                 case MONO_TYPE_I:
1435                 case MONO_TYPE_U:
1436                 case MONO_TYPE_PTR:
1437                 case MONO_TYPE_FNPTR:
1438                 case MONO_TYPE_CLASS:
1439                 case MONO_TYPE_OBJECT:
1440                 case MONO_TYPE_STRING:
1441                 case MONO_TYPE_SZARRAY:
1442                 case MONO_TYPE_ARRAY:
1443                         cinfo->args[nParm].size = sizeof(gpointer);
1444                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1445                         nParm++;
1446                         break;
1447                 case MONO_TYPE_I8:
1448                 case MONO_TYPE_U8:
1449                         cinfo->args[nParm].size = sizeof(long long);
1450                         add_general (&gr, sz, cinfo->args+nParm, FALSE);
1451                         nParm++;
1452                         break;
1453                 case MONO_TYPE_R4:
1454                         cinfo->args[nParm].size = sizeof(float);
1455                         add_float (&fr, sz, cinfo->args+nParm);
1456                         nParm++;
1457                         break;
1458                 case MONO_TYPE_R8:
1459                         cinfo->args[nParm].size = sizeof(double);
1460                         add_float (&fr, sz, cinfo->args+nParm);
1461                         nParm++;
1462                         break;
1463                 case MONO_TYPE_GENERICINST:
1464                         if (!mono_type_generic_inst_is_valuetype (sig->params [i])) {
1465                                 cinfo->args[nParm].size = sizeof(gpointer);
1466                                 add_general (&gr, sz, cinfo->args+nParm, TRUE);
1467                                 nParm++;
1468                                 break;
1469                         }
1470                         /* Fall through */
1471                 case MONO_TYPE_VALUETYPE: {
1472                         MonoMarshalType *info;
1473                         MonoClass *klass = mono_class_from_mono_type (sig->params [i]);
1474                         if (sig->pinvoke)
1475                                 size = mono_class_native_size (klass, &align);
1476                         else
1477                                 size = mono_class_value_size (klass, &align);
1478
1479                         info = mono_marshal_load_type_info (klass);
1480
1481                         if ((info->native_size == sizeof(float)) &&
1482                             (info->num_fields  == 1) &&
1483                             (info->fields[0].field->type->type == MONO_TYPE_R4)) {
1484                                 cinfo->args[nParm].size = sizeof(float);
1485                                 add_float(&fr, sz, cinfo->args+nParm);
1486                                 break;
1487                         }
1488
1489                         if ((info->native_size == sizeof(double)) &&
1490                             (info->num_fields  == 1) &&
1491                             (info->fields[0].field->type->type == MONO_TYPE_R8)) {
1492                                 cinfo->args[nParm].size = sizeof(double);
1493                                 add_float(&fr, sz, cinfo->args+nParm);
1494                                 break;
1495                         }
1496
1497                         cinfo->args[nParm].vtsize  = 0;
1498                         cinfo->args[nParm].size    = 0;
1499
1500                         switch (size) {
1501                                 /*----------------------------------*/
1502                                 /* On S/390, structures of size 1,  */
1503                                 /* 2, 4, and 8 bytes are passed in  */
1504                                 /* (a) register(s).                 */
1505                                 /*----------------------------------*/
1506                                 case 0:
1507                                 case 1:
1508                                 case 2:
1509                                 case 4:
1510                                         add_general(&gr, sz, cinfo->args+nParm, TRUE);
1511                                         cinfo->args[nParm].size    = size;
1512                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1513                                         nParm++;
1514                                         sz->local_size            += sizeof(long);
1515                                         break;
1516                                 case 8:
1517                                         add_general(&gr, sz, cinfo->args+nParm, FALSE);
1518                                         cinfo->args[nParm].size    = sizeof(long long);
1519                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1520                                         nParm++;
1521                                         sz->local_size            += sizeof(long long);
1522                                         break;
1523                                 default:
1524                                         add_stackParm(&gr, sz, cinfo->args+nParm, size);
1525                                         nParm++;
1526                         }
1527                 }
1528                         break;
1529                 case MONO_TYPE_TYPEDBYREF: {
1530                         int size = sizeof (MonoTypedRef);
1531
1532                         cinfo->args[nParm].vtsize  = 0;
1533                         cinfo->args[nParm].size    = 0;
1534
1535                         switch (size) {
1536                                 /*----------------------------------*/
1537                                 /* On S/390, structures of size 1,  */
1538                                 /* 2, 4, and 8 bytes are passed in  */
1539                                 /* (a) register(s).                 */
1540                                 /*----------------------------------*/
1541                                 case 0:
1542                                 case 1:
1543                                 case 2:
1544                                 case 4:
1545                                         add_general(&gr, sz, cinfo->args+nParm, TRUE);
1546                                         cinfo->args[nParm].size    = size;
1547                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1548                                         nParm++;
1549                                         sz->local_size            += sizeof(long);
1550                                         break;
1551                                 case 8:
1552                                         add_general(&gr, sz, cinfo->args+nParm, FALSE);
1553                                         cinfo->args[nParm].size    = sizeof(long long);
1554                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1555                                         nParm++;
1556                                         sz->local_size            += sizeof(long long);
1557                                         break;
1558                                 default:
1559                                         add_stackParm(&gr, sz, cinfo->args+nParm, size);
1560                                         nParm++;
1561                         }
1562                 }
1563                         break;
1564                 default:
1565                         g_error ("Can't trampoline 0x%x", sig->params [i]->type);
1566                 }
1567         }
1568
1569         /*----------------------------------------------------------*/
1570         /* If we are passing a structure back then if it won't be   */
1571         /* in a register(s) then we make room at the end of the     */
1572         /* parameters that may have been placed on the stack        */
1573         /*----------------------------------------------------------*/
1574         if (cinfo->struct_ret) {
1575                 cinfo->ret.offset = sz->stack_size;
1576                 switch (cinfo->ret.size) {
1577                 case 0:
1578                 case 1:
1579                 case 2:
1580                 case 4:
1581                 case 8:
1582                         break;
1583                 default:
1584                         sz->stack_size   += S390_ALIGN(cinfo->ret.size, align);
1585                 }
1586         }
1587
1588         /*----------------------------------------------------------*/
1589         /* Handle the case where there are no implicit arguments    */
1590         /*----------------------------------------------------------*/
1591         if ((sig->call_convention == MONO_CALL_VARARG) &&
1592             (sig->param_count == sig->sentinelpos)) {
1593                 gr = S390_LAST_ARG_REG + 1;
1594                 add_general (&gr, sz, &cinfo->sigCookie, TRUE);
1595         }
1596
1597         cinfo->lastgr   = gr;
1598         sz->stack_size  = sz->stack_size + sz->local_size + sz->parm_size +
1599                           sz->offset;
1600         sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1601
1602         return (cinfo);
1603 }
1604
1605 /*========================= End of Function ========================*/
1606
1607 /*------------------------------------------------------------------*/
1608 /*                                                                  */
1609 /* Name         - mono_arch_allocate_vars                           */
1610 /*                                                                  */
1611 /* Function     - Set var information according to the calling      */
1612 /*                convention for S/390. The local var stuff should  */
1613 /*                most likely be split in another method.           */
1614 /*                                                                  */
1615 /* Parameter    - @m - Compile unit.                                */
1616 /*                                                                  */
1617 /*------------------------------------------------------------------*/
1618
1619 void
1620 mono_arch_allocate_vars (MonoCompile *cfg)
1621 {
1622         MonoMethodSignature *sig;
1623         MonoMethodHeader *header;
1624         MonoInst *inst;
1625         CallInfo *cinfo;
1626         size_data sz;
1627         int iParm, iVar, offset, size, align, curinst;
1628         int frame_reg = STK_BASE;
1629         int sArg, eArg;
1630
1631         header  = mono_method_get_header (cfg->method);
1632
1633         cfg->flags |= MONO_CFG_HAS_SPILLUP;
1634
1635         /*---------------------------------------------------------*/
1636         /* We use the frame register also for any method that has  */
1637         /* filter clauses. This way, when the handlers are called, */
1638         /* the code will reference local variables using the frame */
1639         /* reg instead of the stack pointer: if we had to restore  */
1640         /* the stack pointer, we'd corrupt the method frames that  */
1641         /* are already on the stack (since filters get called      */
1642         /* before stack unwinding happens) when the filter code    */
1643         /* would call any method.                                  */
1644         /*---------------------------------------------------------*/
1645         if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
1646                 frame_reg = s390_r11;
1647
1648         cfg->frame_reg = frame_reg;
1649
1650         if (frame_reg != STK_BASE)
1651                 cfg->used_int_regs |= 1 << frame_reg;
1652
1653         sig     = mono_method_signature (cfg->method);
1654
1655         cinfo   = calculate_sizes (cfg, sig, &sz, sig->pinvoke);
1656
1657         if (cinfo->struct_ret) {
1658                 cfg->ret->opcode = OP_REGVAR;
1659                 cfg->ret->inst_c0 = s390_r2;
1660         } else {
1661                 switch (mono_type_get_underlying_type (sig->ret)->type) {
1662                 case MONO_TYPE_VOID:
1663                         break;
1664                 default:
1665                         cfg->ret->opcode = OP_REGVAR;
1666                         cfg->ret->dreg   = s390_r2;
1667                         break;
1668                 }
1669         }
1670
1671         /*--------------------------------------------------------------*/
1672         /* local vars are at a positive offset from the stack pointer   */
1673         /* also note that if the function uses alloca, we use s390_r11  */
1674         /* to point at the local variables.                             */
1675         /* add parameter area size for called functions                 */
1676         /*--------------------------------------------------------------*/
1677         offset          = (cfg->param_area + S390_MINIMAL_STACK_SIZE);
1678         cfg->sig_cookie = 0;
1679
1680         if (cinfo->struct_ret) {
1681                 inst               = cfg->ret;
1682                 offset             = S390_ALIGN(offset, sizeof(gpointer));
1683                 inst->inst_offset  = offset;
1684                 inst->opcode       = OP_REGOFFSET;
1685                 inst->inst_basereg = frame_reg;
1686                 offset            += sizeof(gpointer);
1687                 if ((sig->call_convention == MONO_CALL_VARARG) &&
1688                     (!retFitsInReg (cinfo->ret.size)))
1689                         cfg->sig_cookie += cinfo->ret.size;
1690         }
1691
1692         if (sig->hasthis) {
1693                 inst = cfg->args [0];
1694                 if (inst->opcode != OP_REGVAR) {
1695                         inst->opcode       = OP_REGOFFSET;
1696                         inst->inst_basereg = frame_reg;
1697                         offset             = S390_ALIGN(offset, sizeof(gpointer));
1698                         inst->inst_offset  = offset;
1699                         offset            += sizeof (gpointer);
1700                 }
1701                 curinst = sArg = 1;
1702         } else {
1703                 curinst = sArg = 0;
1704         }
1705
1706         eArg = sig->param_count + sArg;
1707
1708         if (sig->call_convention == MONO_CALL_VARARG)
1709                 cfg->sig_cookie += S390_MINIMAL_STACK_SIZE;
1710
1711         for (iParm = sArg; iParm < eArg; ++iParm) {
1712                 inst = cfg->args [curinst];
1713                 if (inst->opcode != OP_REGVAR) {
1714                         switch (cinfo->args[iParm].regtype) {
1715                                 case RegTypeStructByAddr :
1716                                 if (cinfo->args[iParm].reg == STK_BASE) {
1717                                         inst->opcode       = OP_S390_LOADARG;
1718                                         inst->inst_basereg = frame_reg;
1719                                         size               = abs(cinfo->args[iParm].vtsize);
1720                                         offset             = S390_ALIGN(offset, sizeof(long));
1721                                         inst->inst_offset  = offset;
1722                                         inst->backend.arg_info       = cinfo->args[iParm].offset;
1723                                 } else {
1724                                         inst->opcode       = OP_S390_ARGREG;
1725                                         inst->inst_basereg = frame_reg;
1726                                         size               = sizeof(gpointer);
1727                                         offset             = S390_ALIGN(offset, size);
1728                                         inst->inst_offset  = offset;
1729                                         inst->backend.arg_info       = cinfo->args[iParm].offset;
1730                                 }
1731                                         break;
1732                                 case RegTypeStructByVal :
1733                                         inst->opcode       = OP_S390_ARGPTR;
1734                                         inst->inst_basereg = frame_reg;
1735                                         size               = cinfo->args[iParm].size;
1736                                         offset             = S390_ALIGN(offset, size);
1737                                         inst->inst_offset  = offset;
1738                                         inst->backend.arg_info       = cinfo->args[iParm].offset;
1739                                         break;
1740                                 default :
1741                                 if (cinfo->args[iParm].reg != STK_BASE) {
1742                                         inst->opcode       = OP_REGOFFSET;
1743                                         inst->inst_basereg = frame_reg;
1744                                         size               = (cinfo->args[iParm].size < 8
1745                                                               ? sizeof(long)
1746                                                               : sizeof(long long));
1747                                         offset             = S390_ALIGN(offset, size);
1748                                         inst->inst_offset  = offset;
1749                                 } else {
1750                                         inst->opcode       = OP_S390_STKARG;
1751                                         inst->inst_basereg = frame_reg;
1752                                         size               = (cinfo->args[iParm].size < 4
1753                                                               ? 4 - cinfo->args[iParm].size
1754                                                               : 0);
1755                                         inst->inst_offset  = cinfo->args[iParm].offset +
1756                                                              size;
1757                                         inst->backend.arg_info       = 0;
1758                                         size               = sizeof(long);
1759                                 }
1760                         }
1761                         if ((sig->call_convention == MONO_CALL_VARARG) &&
1762                             (cinfo->args[iParm].regtype != RegTypeGeneral) &&
1763                             (iParm < sig->sentinelpos))
1764                                 cfg->sig_cookie += size;
1765
1766                         offset += size;
1767                 }
1768                 curinst++;
1769         }
1770
1771         curinst = cfg->locals_start;
1772         for (iVar = curinst; iVar < cfg->num_varinfo; ++iVar) {
1773                 inst = cfg->varinfo [iVar];
1774                 if ((inst->flags & MONO_INST_IS_DEAD) ||
1775                     (inst->opcode == OP_REGVAR))
1776                         continue;
1777
1778                 /*--------------------------------------------------*/
1779                 /* inst->backend.is_pinvoke indicates native sized value types, */
1780                 /* this is used by the pinvoke wrappers when they   */
1781                 /* call functions returning structure               */
1782                 /*--------------------------------------------------*/
1783                 if (inst->backend.is_pinvoke && MONO_TYPE_ISSTRUCT (inst->inst_vtype))
1784                         size = mono_class_native_size (mono_class_from_mono_type(inst->inst_vtype), &align);
1785                 else
1786                         size = mono_type_size (inst->inst_vtype, &align);
1787
1788                 offset             = S390_ALIGN(offset, align);
1789                 inst->inst_offset  = offset;
1790                 inst->opcode       = OP_REGOFFSET;
1791                 inst->inst_basereg = frame_reg;
1792                 offset            += size;
1793                 DEBUG (g_print("allocating local %d to %ld\n", iVar, inst->inst_offset));
1794         }
1795
1796         /*------------------------------------------------------*/
1797         /* Allow space for the trace method stack area if needed*/
1798         /*------------------------------------------------------*/
1799         if (mono_jit_trace_calls != NULL && mono_trace_eval (cfg->method)) {
1800                 offset += S390_TRACE_STACK_SIZE;
1801         }
1802
1803         /*------------------------------------------------------*/
1804         /* Reserve space to save LMF and caller saved registers */
1805         /*------------------------------------------------------*/
1806         if (cfg->method->save_lmf)
1807                 offset += sizeof (MonoLMF);
1808
1809         /*------------------------------------------------------*/
1810         /* align the offset                                     */
1811         /*------------------------------------------------------*/
1812         cfg->stack_offset = S390_ALIGN(offset, S390_STACK_ALIGNMENT);
1813
1814 }
1815
1816 /*========================= End of Function ========================*/
1817
1818 /*------------------------------------------------------------------*/
1819 /*                                                                  */
1820 /* Name         - mono_arch_call_opcode                             */
1821 /*                                                                  */
1822 /* Function     - Take the arguments and generate the arch-specific */
1823 /*                instructions to properly call the function. This  */
1824 /*                includes pushing, moving argments to the correct  */
1825 /*                etc.                                              */
1826 /*                                                                  */
1827 /*------------------------------------------------------------------*/
1828
1829 MonoCallInst*
1830 mono_arch_call_opcode (MonoCompile *cfg, MonoBasicBlock* bb,
1831                        MonoCallInst *call, int is_virtual) {
1832         MonoInst *in;
1833         MonoCallArgParm *arg;
1834         MonoMethodSignature *sig;
1835         int i, n, lParamArea;
1836         CallInfo *cinfo;
1837         ArgInfo *ainfo = NULL;
1838         size_data sz;
1839         int stackSize;
1840
1841         sig = call->signature;
1842         n = sig->param_count + sig->hasthis;
1843         DEBUG (g_print ("Call requires: %d parameters\n",n));
1844
1845         cinfo = calculate_sizes (cfg, sig, &sz, sig->pinvoke);
1846
1847         stackSize         = sz.stack_size + sz.local_size + sz.parm_size + sz.offset;
1848         call->stack_usage = MAX(stackSize, call->stack_usage);
1849         lParamArea        = MAX((call->stack_usage-S390_MINIMAL_STACK_SIZE-sz.parm_size), 0);
1850         cfg->param_area   = MAX(((signed) cfg->param_area), lParamArea);
1851         cfg->flags       |= MONO_CFG_HAS_CALLS;
1852
1853         if (cinfo->struct_ret)
1854                 call->used_iregs |= 1 << cinfo->ret.reg;
1855
1856         for (i = 0; i < n; ++i) {
1857                 ainfo = cinfo->args + i;
1858
1859                 if ((sig->call_convention == MONO_CALL_VARARG) &&
1860                     (i == sig->sentinelpos)) {
1861                         emit_sig_cookie (cfg, call, cinfo, ainfo->size);
1862                 }
1863
1864                 if (is_virtual && i == 0) {
1865                         /* the argument will be attached to the call instrucion */
1866                         in = call->args [i];
1867                         call->used_iregs |= 1 << ainfo->reg;
1868                 } else {
1869                         MONO_INST_NEW_CALL_ARG (cfg, arg, OP_OUTARG);
1870                         in                  = call->args [i];
1871                         arg->ins.cil_code   = in->cil_code;
1872                         arg->ins.inst_left  = in;
1873                         arg->ins.type       = in->type;
1874                         MONO_INST_LIST_ADD_TAIL (&arg->ins.node, &call->out_args);
1875                         arg->ins.inst_right = (MonoInst *) call;
1876                         if (ainfo->regtype == RegTypeGeneral) {
1877                                 arg->ins.backend.reg3   = ainfo->reg;
1878                                 call->used_iregs |= 1 << ainfo->reg;
1879                                 if (arg->ins.type == STACK_I8)
1880                                         call->used_iregs |= 1 << (ainfo->reg + 1);
1881                         } else if (ainfo->regtype == RegTypeStructByAddr) {
1882                                 call->used_iregs |= 1 << ainfo->reg;
1883                                 arg->ins.sreg1    = ainfo->reg;
1884                                 arg->ins.opcode   = OP_OUTARG_VT;
1885                                 arg->size         = -ainfo->vtsize;
1886                                 arg->offset       = ainfo->offset;
1887                                 arg->offPrm       = ainfo->offparm + sz.offStruct;
1888                         } else if (ainfo->regtype == RegTypeStructByVal) {
1889                                 if (ainfo->reg != STK_BASE) {
1890                                         switch (ainfo->size) {
1891                                         case 0:
1892                                         case 1:
1893                                         case 2:
1894                                         case 4:
1895                                                 call->used_iregs |= 1 << ainfo->reg;
1896                                                 break;
1897                                         case 8:
1898                                                 call->used_iregs |= 1 << ainfo->reg;
1899                                                 call->used_iregs |= 1 << (ainfo->reg+1);
1900                                                 break;
1901                                         default:
1902                                                 call->used_iregs |= 1 << ainfo->reg;
1903                                         }
1904                                 }
1905                                 arg->ins.sreg1  = ainfo->reg;
1906                                 arg->ins.opcode = OP_OUTARG_VT;
1907                                 arg->size       = ainfo->size;
1908                                 arg->offset     = ainfo->offset;
1909                                 arg->offPrm     = ainfo->offparm + sz.offStruct;
1910                         } else if (ainfo->regtype == RegTypeBase) {
1911                                 arg->ins.opcode   = OP_OUTARG_MEMBASE;
1912                                 arg->ins.sreg1    = ainfo->reg;
1913                                 arg->size         = ainfo->size;
1914                                 arg->offset       = ainfo->offset;
1915                                 call->used_iregs |= 1 << ainfo->reg;
1916                         } else if (ainfo->regtype == RegTypeFP) {
1917                                 arg->ins.backend.reg3   = ainfo->reg;
1918                                 call->used_fregs |= 1 << ainfo->reg;
1919                                 if (ainfo->size == 4)
1920                                         arg->ins.opcode = OP_OUTARG_R4;
1921                                 else
1922                                         arg->ins.opcode = OP_OUTARG_R8;
1923                         } else {
1924                                 g_assert_not_reached ();
1925                         }
1926                 }
1927         }
1928
1929         /*
1930          * Handle the case where there are no implicit arguments
1931          */
1932         if ((sig->call_convention == MONO_CALL_VARARG) &&
1933             (i == sig->sentinelpos)) {
1934                 emit_sig_cookie (cfg, call, cinfo, ainfo->size);
1935         }
1936
1937         g_free (cinfo);
1938         return call;
1939 }
1940
1941 /*========================= End of Function ========================*/
1942
1943 /*------------------------------------------------------------------*/
1944 /*                                                                  */
1945 /* Name         - emit_sig_cookie.                                  */
1946 /*                                                                  */
1947 /* Function     - For variable length parameter lists construct a   */
1948 /*                signature cookie and emit it.                     */
1949 /*                                                                  */
1950 /*------------------------------------------------------------------*/
1951
1952 static void
1953 emit_sig_cookie (MonoCompile *cfg, MonoCallInst *call,
1954                  CallInfo *cinfo, int argSize)
1955 {
1956         MonoCallArgParm *arg;
1957         MonoMethodSignature *tmpSig;
1958         MonoInst *sigArg;
1959
1960         cfg->disable_aot = TRUE;
1961
1962         /*----------------------------------------------------------*/
1963         /* mono_ArgIterator_Setup assumes the signature cookie is   */
1964         /* passed first and all the arguments which were before it  */
1965         /* passed on the stack after the signature. So compensate   */
1966         /* by passing a different signature.                        */
1967         /*----------------------------------------------------------*/
1968         tmpSig = mono_metadata_signature_dup (call->signature);
1969         tmpSig->param_count -= call->signature->sentinelpos;
1970         tmpSig->sentinelpos  = 0;
1971         if (tmpSig->param_count > 0)
1972                 memcpy (tmpSig->params,
1973                         call->signature->params + call->signature->sentinelpos,
1974                         tmpSig->param_count * sizeof(MonoType *));
1975
1976         MONO_INST_NEW (cfg, sigArg, OP_ICONST);
1977         sigArg->inst_p0 = tmpSig;
1978
1979         MONO_INST_NEW_CALL_ARG (cfg, arg, OP_OUTARG_MEMBASE);
1980         arg->ins.inst_left   = sigArg;
1981         arg->ins.inst_right  = (MonoInst *) call;
1982         arg->size            = argSize;
1983         arg->offset          = cinfo->sigCookie.offset;
1984         MONO_INST_LIST_ADD_TAIL (&arg->ins.node, &call->out_args);
1985 }
1986
1987 /*========================= End of Function ========================*/
1988
1989 /*------------------------------------------------------------------*/
1990 /*                                                                  */
1991 /* Name         - mono_arch_instrument_mem_needs                    */
1992 /*                                                                  */
1993 /* Function     - Allow tracing to work with this interface (with   */
1994 /*                an optional argument).                            */
1995 /*                                                                  */
1996 /*------------------------------------------------------------------*/
1997
1998 void
1999 mono_arch_instrument_mem_needs (MonoMethod *method, int *stack, int *code)
2000 {
2001         /* no stack room needed now (may be needed for FASTCALL-trace support) */
2002         *stack = 0;
2003         /* split prolog-epilog requirements? */
2004         *code = 50; /* max bytes needed: check this number */
2005 }
2006
2007 /*========================= End of Function ========================*/
2008
2009 /*------------------------------------------------------------------*/
2010 /*                                                                  */
2011 /* Name         - mono_arch_instrument_prolog                       */
2012 /*                                                                  */
2013 /* Function     - Create an "instrumented" prolog.                  */
2014 /*                                                                  */
2015 /*------------------------------------------------------------------*/
2016
2017 void*
2018 mono_arch_instrument_prolog (MonoCompile *cfg, void *func, void *p,
2019                              gboolean enable_arguments)
2020 {
2021         guchar  *code = p;
2022         int     parmOffset,
2023                 fpOffset,
2024                 baseReg;
2025
2026         parmOffset = cfg->stack_usage - S390_TRACE_STACK_SIZE;
2027         if (cfg->method->save_lmf)
2028                 parmOffset -= sizeof(MonoLMF);
2029         fpOffset   = parmOffset + (5*sizeof(gint32));
2030         if (fpOffset > 4096) {
2031                 s390_lr (code, s390_r12, STK_BASE);
2032                 baseReg = s390_r12;
2033                 while (fpOffset > 4096) {
2034                         s390_ahi (code, baseReg, 4096);
2035                         fpOffset   -= 4096;
2036                         parmOffset -= 4096;
2037                 }
2038         } else {
2039                 baseReg = STK_BASE;
2040         }
2041
2042         s390_stm  (code, s390_r2, s390_r6, baseReg, parmOffset);
2043         s390_std  (code, s390_f0, 0, baseReg, fpOffset);
2044         s390_std  (code, s390_f1, 0, baseReg, fpOffset+sizeof(gdouble));
2045         s390_std  (code, s390_f2, 0, baseReg, fpOffset+2*sizeof(gdouble));
2046         s390_basr (code, s390_r13, 0);
2047         s390_j    (code, 6);
2048         s390_word (code, cfg->method);
2049         s390_word (code, func);
2050         s390_l    (code, s390_r2, 0, s390_r13, 4);
2051         s390_la   (code, s390_r3, 0, baseReg, parmOffset);
2052         s390_lr   (code, s390_r4, STK_BASE);
2053         s390_ahi  (code, s390_r4, cfg->stack_usage);
2054         s390_l    (code, s390_r1, 0, s390_r13, 8);
2055         s390_basr (code, s390_r14, s390_r1);
2056         s390_ld   (code, s390_f2, 0, baseReg, fpOffset+2*sizeof(gdouble));
2057         s390_ld   (code, s390_f1, 0, baseReg, fpOffset+sizeof(gdouble));
2058         s390_ld   (code, s390_f0, 0, baseReg, fpOffset);
2059         s390_lm   (code, s390_r2, s390_r6, baseReg, parmOffset);
2060
2061         return code;
2062 }
2063
2064 /*========================= End of Function ========================*/
2065
2066 /*------------------------------------------------------------------*/
2067 /*                                                                  */
2068 /* Name         - mono_arch_instrument_epilog                       */
2069 /*                                                                  */
2070 /* Function     - Create an epilog that will handle the returned    */
2071 /*                values used in instrumentation.                   */
2072 /*                                                                  */
2073 /*------------------------------------------------------------------*/
2074
2075 void*
2076 mono_arch_instrument_epilog (MonoCompile *cfg, void *func, void *p, gboolean enable_arguments)
2077 {
2078         guchar     *code = p;
2079         int        save_mode = SAVE_NONE,
2080                    saveOffset;
2081         MonoMethod *method = cfg->method;
2082         int        rtype = mono_type_get_underlying_type (mono_method_signature (method)->ret)->type;
2083
2084         saveOffset = cfg->stack_usage - S390_TRACE_STACK_SIZE;
2085         if (method->save_lmf)
2086                 saveOffset -= sizeof(MonoLMF);
2087
2088 handle_enum:
2089         switch (rtype) {
2090         case MONO_TYPE_VOID:
2091                 /* special case string .ctor icall */
2092                 if (strcmp (".ctor", method->name) && method->klass == mono_defaults.string_class)
2093                         save_mode = SAVE_ONE;
2094                 else
2095                         save_mode = SAVE_NONE;
2096                 break;
2097         case MONO_TYPE_I8:
2098         case MONO_TYPE_U8:
2099                 save_mode = SAVE_TWO;
2100                 break;
2101         case MONO_TYPE_R4:
2102                 save_mode = SAVE_R4;
2103                 break;
2104         case MONO_TYPE_R8:
2105                 save_mode = SAVE_R8;
2106                 break;
2107         case MONO_TYPE_VALUETYPE:
2108                 if (mono_method_signature (method)->ret->data.klass->enumtype) {
2109                         rtype = mono_method_signature (method)->ret->data.klass->enum_basetype->type;
2110                         goto handle_enum;
2111                 }
2112                 save_mode = SAVE_STRUCT;
2113                 break;
2114         default:
2115                 save_mode = SAVE_ONE;
2116                 break;
2117         }
2118
2119         switch (save_mode) {
2120         case SAVE_TWO:
2121                 s390_stm (code, s390_r2, s390_r3, cfg->frame_reg, saveOffset);
2122                 if (enable_arguments) {
2123                         s390_lr (code, s390_r4, s390_r3);
2124                         s390_lr (code, s390_r3, s390_r2);
2125                 }
2126                 break;
2127         case SAVE_ONE:
2128                 s390_st (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2129                 if (enable_arguments) {
2130                         s390_lr (code, s390_r3, s390_r2);
2131                 }
2132                 break;
2133         case SAVE_R4:
2134                 s390_std (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2135                 if (enable_arguments) {
2136                         s390_ldebr (code, s390_f0, s390_f0);
2137                 }
2138                 break;
2139         case SAVE_R8:
2140                 s390_std (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2141                 break;
2142         case SAVE_STRUCT:
2143                 s390_st (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2144                 if (enable_arguments) {
2145                         s390_l (code, s390_r3, 0, cfg->frame_reg,
2146                                 S390_MINIMAL_STACK_SIZE+cfg->param_area);
2147                 }
2148                 break;
2149         case SAVE_NONE:
2150         default:
2151                 break;
2152         }
2153
2154         s390_basr (code, s390_r13, 0);
2155         s390_j    (code, 6);
2156         s390_word (code, cfg->method);
2157         s390_word (code, func);
2158         s390_l    (code, s390_r2, 0, s390_r13, 4);
2159         s390_l    (code, s390_r1, 0, s390_r13, 8);
2160         s390_basr (code, s390_r14, s390_r1);
2161
2162         switch (save_mode) {
2163         case SAVE_TWO:
2164                 s390_lm  (code, s390_r2, s390_r3, cfg->frame_reg, saveOffset);
2165                 break;
2166         case SAVE_ONE:
2167                 s390_l   (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2168                 break;
2169         case SAVE_R4:
2170         case SAVE_R8:
2171                 s390_ld  (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2172                 break;
2173         case SAVE_STRUCT:
2174                 s390_l   (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2175                 break;
2176         case SAVE_NONE:
2177         default:
2178                 break;
2179         }
2180
2181         return code;
2182 }
2183
2184 /*========================= End of Function ========================*/
2185
2186 void
2187 mono_arch_peephole_pass_1 (MonoCompile *cfg, MonoBasicBlock *bb)
2188 {
2189 }
2190
2191 /*------------------------------------------------------------------*/
2192 /*                                                                  */
2193 /* Name         - mono_arch_peephole_pass                                     */
2194 /*                                                                  */
2195 /* Function     - Form a peephole pass at the code looking for      */
2196 /*                simple optimizations.                             */
2197 /*                                                                  */
2198 /*------------------------------------------------------------------*/
2199
2200 void
2201 mono_arch_peephole_pass_2 (MonoCompile *cfg, MonoBasicBlock *bb)
2202 {
2203         MonoInst *ins, *n;
2204
2205         MONO_INST_LIST_FOR_EACH_ENTRY_SAFE (ins, n, &bb->ins_list, node) {
2206                 MonoInst *last_ins = mono_inst_list_prev (&ins->node, &bb->ins_list);
2207                 switch (ins->opcode) {
2208                 case OP_MUL_IMM:
2209                         /* remove unnecessary multiplication with 1 */
2210                         if (ins->inst_imm == 1) {
2211                                 if (ins->dreg != ins->sreg1) {
2212                                         ins->opcode = OP_MOVE;
2213                                 } else {
2214                                         MONO_DEL_INS (ins);
2215                                         continue;
2216                                 }
2217                         }
2218                         break;
2219                 case OP_LOAD_MEMBASE:
2220                 case OP_LOADI4_MEMBASE:
2221                         /*
2222                          * OP_STORE_MEMBASE_REG reg, offset(basereg)
2223                          * OP_LOAD_MEMBASE offset(basereg), reg
2224                          */
2225                         if (last_ins && (last_ins->opcode == OP_STOREI4_MEMBASE_REG
2226                                          || last_ins->opcode == OP_STORE_MEMBASE_REG) &&
2227                             ins->inst_basereg == last_ins->inst_destbasereg &&
2228                             ins->inst_offset == last_ins->inst_offset) {
2229                                 if (ins->dreg == last_ins->sreg1) {
2230                                         MONO_DEL_INS (ins);
2231                                         continue;
2232                                 } else {
2233                                         ins->opcode = OP_MOVE;
2234                                         ins->sreg1 = last_ins->sreg1;
2235                                 }
2236
2237                         /*
2238                          * Note: reg1 must be different from the basereg in the second load
2239                          * OP_LOAD_MEMBASE offset(basereg), reg1
2240                          * OP_LOAD_MEMBASE offset(basereg), reg2
2241                          * -->
2242                          * OP_LOAD_MEMBASE offset(basereg), reg1
2243                          * OP_MOVE reg1, reg2
2244                          */
2245                         } if (last_ins && (last_ins->opcode == OP_LOADI4_MEMBASE
2246                                            || last_ins->opcode == OP_LOAD_MEMBASE) &&
2247                               ins->inst_basereg != last_ins->dreg &&
2248                               ins->inst_basereg == last_ins->inst_basereg &&
2249                               ins->inst_offset == last_ins->inst_offset) {
2250
2251                                 if (ins->dreg == last_ins->dreg) {
2252                                         MONO_DEL_INS (ins);
2253                                         continue;
2254                                 } else {
2255                                         ins->opcode = OP_MOVE;
2256                                         ins->sreg1 = last_ins->dreg;
2257                                 }
2258
2259                                 //g_assert_not_reached ();
2260
2261 #if 0
2262                         /*
2263                          * OP_STORE_MEMBASE_IMM imm, offset(basereg)
2264                          * OP_LOAD_MEMBASE offset(basereg), reg
2265                          * -->
2266                          * OP_STORE_MEMBASE_IMM imm, offset(basereg)
2267                          * OP_ICONST reg, imm
2268                          */
2269                         } else if (last_ins && (last_ins->opcode == OP_STOREI4_MEMBASE_IMM
2270                                                 || last_ins->opcode == OP_STORE_MEMBASE_IMM) &&
2271                                    ins->inst_basereg == last_ins->inst_destbasereg &&
2272                                    ins->inst_offset == last_ins->inst_offset) {
2273                                 //static int c = 0; printf ("MATCHX %s %d\n", cfg->method->name,c++);
2274                                 ins->opcode = OP_ICONST;
2275                                 ins->inst_c0 = last_ins->inst_imm;
2276                                 g_assert_not_reached (); // check this rule
2277 #endif
2278                         }
2279                         break;
2280                 case OP_LOADU1_MEMBASE:
2281                 case OP_LOADI1_MEMBASE:
2282                         if (last_ins && (last_ins->opcode == OP_STOREI1_MEMBASE_REG) &&
2283                                         ins->inst_basereg == last_ins->inst_destbasereg &&
2284                                         ins->inst_offset == last_ins->inst_offset) {
2285                                 ins->opcode = (ins->opcode == OP_LOADI1_MEMBASE) ? CEE_CONV_I1 : CEE_CONV_U1;
2286                                 ins->sreg1 = last_ins->sreg1;
2287                         }
2288                         break;
2289                 case OP_LOADU2_MEMBASE:
2290                 case OP_LOADI2_MEMBASE:
2291                         if (last_ins && (last_ins->opcode == OP_STOREI2_MEMBASE_REG) &&
2292                                         ins->inst_basereg == last_ins->inst_destbasereg &&
2293                                         ins->inst_offset == last_ins->inst_offset) {
2294                                 ins->opcode = (ins->opcode == OP_LOADI2_MEMBASE) ? CEE_CONV_I2 : CEE_CONV_U2;
2295                                 ins->sreg1 = last_ins->sreg1;
2296                         }
2297                         break;
2298                 case CEE_CONV_I4:
2299                 case CEE_CONV_U4:
2300                 case OP_MOVE:
2301                         /*
2302                          * OP_MOVE reg, reg
2303                          */
2304                         if (ins->dreg == ins->sreg1) {
2305                                 MONO_DEL_INS (ins);
2306                                 continue;
2307                         }
2308                         /*
2309                          * OP_MOVE sreg, dreg
2310                          * OP_MOVE dreg, sreg
2311                          */
2312                         if (last_ins && last_ins->opcode == OP_MOVE &&
2313                             ins->sreg1 == last_ins->dreg &&
2314                             ins->dreg == last_ins->sreg1) {
2315                                 MONO_DEL_INS (ins);
2316                                 continue;
2317                         }
2318                         break;
2319                 }
2320         }
2321 }
2322
2323 /*========================= End of Function ========================*/
2324
2325 void
2326 mono_arch_lowering_pass (MonoCompile *cfg, MonoBasicBlock *bb)
2327 {
2328 }
2329
2330 /*========================= End of Function ========================*/
2331
2332 /*------------------------------------------------------------------*/
2333 /*                                                                  */
2334 /* Name         - emit_float_to_int                                 */
2335 /*                                                                  */
2336 /* Function     - Create instructions which will convert a floating */
2337 /*                point value to integer.                           */
2338 /*                                                                  */
2339 /*------------------------------------------------------------------*/
2340
2341 static guchar*
2342 emit_float_to_int (MonoCompile *cfg, guchar *code, int dreg, int sreg, int size, gboolean is_signed)
2343 {
2344         /* sreg is a float, dreg is an integer reg. */
2345         if (is_signed) {
2346                 s390_cfdbr (code, dreg, 5, sreg);
2347                 switch (size) {
2348                         case 1:
2349                                 s390_lhi  (code, s390_r0, 0);
2350                                 s390_lhi  (code, s390_r13, 0xff);
2351                                 s390_ltr  (code, dreg, dreg);
2352                                 s390_jnl  (code, 4);
2353                                 s390_lhi  (code, s390_r0, 0x80);
2354                                 s390_nr   (code, dreg, s390_r13);
2355                                 s390_or   (code, dreg, s390_r0);
2356                                 break;
2357                 }
2358         } else {
2359                 short *o[1];
2360                 s390_basr   (code, s390_r13, 0);
2361                 s390_j      (code, 10);
2362                 s390_llong  (code, 0x41e0000000000000);
2363                 s390_llong  (code, 0x41f0000000000000);
2364                 s390_ldr    (code, s390_f15, sreg);
2365                 s390_cdb    (code, s390_f15, 0, s390_r13, 4);
2366                 s390_jl     (code, 0); CODEPTR(code, o[0]);
2367                 s390_sdb    (code, s390_f15, 0, s390_r13, 12);
2368                 s390_cfdbr  (code, dreg, 7, s390_f15);
2369                 s390_j      (code, 4);
2370                 PTRSLOT(code, o[0]);
2371                 s390_cfdbr  (code, dreg, 5, sreg);
2372                 switch (size) {
2373                         case 1:
2374                                 s390_lhi  (code, s390_r0, 0xff);
2375                                 s390_nr   (code, dreg, s390_r0);
2376                                 break;
2377                         case 2:
2378                                 s390_lhi  (code, s390_r0, -1);
2379                                 s390_srl  (code, s390_r0, 0, 16);
2380                                 s390_nr   (code, dreg, s390_r0);
2381                                 break;
2382                 }
2383         }
2384         return code;
2385 }
2386
2387 /*========================= End of Function ========================*/
2388
2389 /*------------------------------------------------------------------*/
2390 /*                                                                  */
2391 /* Name         - mono_arch_output_basic_block                      */
2392 /*                                                                  */
2393 /* Function     - Perform the "real" work of emitting instructions  */
2394 /*                that will do the work of in the basic block.      */
2395 /*                                                                  */
2396 /*------------------------------------------------------------------*/
2397
2398 void
2399 mono_arch_output_basic_block (MonoCompile *cfg, MonoBasicBlock *bb)
2400 {
2401         MonoInst *ins, *next;
2402         MonoCallInst *call;
2403         guint offset;
2404         guint8 *code = cfg->native_code + cfg->code_len;
2405         guint last_offset = 0;
2406         int max_len, cpos, src2;
2407
2408         /* we don't align basic blocks of loops on s390 */
2409
2410         if (cfg->verbose_level > 2)
2411                 g_print ("Basic block %d starting at offset 0x%x\n", bb->block_num, bb->native_offset);
2412
2413         cpos = bb->max_offset;
2414
2415         if (cfg->prof_options & MONO_PROFILE_COVERAGE) {
2416                 //MonoCoverageInfo *cov = mono_get_coverage_info (cfg->method);
2417                 //g_assert (!mono_compile_aot);
2418                 //cpos += 6;
2419                 //if (bb->cil_code)
2420                 //      cov->data [bb->dfn].iloffset = bb->cil_code - cfg->cil_code;
2421                 /* this is not thread save, but good enough */
2422                 /* fixme: howto handle overflows? */
2423                 //x86_inc_mem (code, &cov->data [bb->dfn].count);
2424         }
2425
2426         MONO_BB_FOR_EACH_INS (bb, ins) {
2427                 offset = code - cfg->native_code;
2428
2429                 max_len = ((guint8 *)ins_get_spec (ins->opcode))[MONO_INST_LEN];
2430
2431                 if (offset > (cfg->code_size - max_len - 16)) {
2432                         cfg->code_size *= 2;
2433                         cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
2434                         code = cfg->native_code + offset;
2435                 }
2436
2437                 mono_debug_record_line_number (cfg, ins, offset);
2438
2439                 switch (ins->opcode) {
2440                 case OP_STOREI1_MEMBASE_IMM: {
2441                         s390_lhi (code, s390_r0, ins->inst_imm);
2442                         if (s390_is_uimm12(ins->inst_offset))
2443                                 s390_stc (code, s390_r0, 0, ins->inst_destbasereg, ins->inst_offset);
2444                         else {
2445                                 s390_basr (code, s390_r13, 0);
2446                                 s390_j    (code, 4);
2447                                 s390_word (code, ins->inst_offset);
2448                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2449                                 s390_stc  (code, s390_r0, s390_r13, ins->inst_destbasereg, 0);
2450                         }
2451                 }
2452                         break;
2453                 case OP_STOREI2_MEMBASE_IMM: {
2454                         s390_lhi (code, s390_r0, ins->inst_imm);
2455                         if (s390_is_uimm12(ins->inst_offset)) {
2456                                 s390_sth (code, s390_r0, 0, ins->inst_destbasereg, ins->inst_offset);
2457                         } else {
2458                                 s390_basr (code, s390_r13, 0);
2459                                 s390_j    (code, 4);
2460                                 s390_word (code, ins->inst_offset);
2461                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2462                                 s390_sth  (code, s390_r0, s390_r13, ins->inst_destbasereg, 0);
2463                         }
2464                 }
2465                         break;
2466                 case OP_STORE_MEMBASE_IMM:
2467                 case OP_STOREI4_MEMBASE_IMM: {
2468                         if (s390_is_imm16(ins->inst_imm)) {
2469                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2470                         } else {
2471                                 s390_basr (code, s390_r13, 0);
2472                                 s390_j    (code, 4);
2473                                 s390_word (code, ins->inst_imm);
2474                                 s390_l    (code, s390_r0, 0, s390_r13, 4);
2475                         }
2476                         if (s390_is_uimm12(ins->inst_offset)) {
2477                                 s390_st  (code, s390_r0, 0, ins->inst_destbasereg, ins->inst_offset);
2478                         } else {
2479                                 s390_basr (code, s390_r13, 0);
2480                                 s390_j    (code, 4);
2481                                 s390_word (code, ins->inst_offset);
2482                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2483                                 s390_st   (code, s390_r0, s390_r13, ins->inst_destbasereg, 0);
2484                         }
2485                 }
2486                         break;
2487                 case OP_STOREI1_MEMBASE_REG: {
2488                         if (s390_is_uimm12(ins->inst_offset)) {
2489                                 s390_stc  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
2490                         } else {
2491                                 s390_basr (code, s390_r13, 0);
2492                                 s390_j    (code, 4);
2493                                 s390_word (code, ins->inst_offset);
2494                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2495                                 s390_stc  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
2496                         }
2497                 }
2498                         break;
2499                 case OP_STOREI2_MEMBASE_REG: {
2500                         if (s390_is_uimm12(ins->inst_offset)) {
2501                                 s390_sth  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
2502                         } else {
2503                                 s390_basr (code, s390_r13, 0);
2504                                 s390_j    (code, 4);
2505                                 s390_word (code, ins->inst_offset);
2506                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2507                                 s390_sth  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
2508                         }
2509                 }
2510                         break;
2511                 case OP_STORE_MEMBASE_REG:
2512                 case OP_STOREI4_MEMBASE_REG: {
2513                         if (s390_is_uimm12(ins->inst_offset)) {
2514                                 s390_st   (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
2515                         } else {
2516                                 s390_basr (code, s390_r13, 0);
2517                                 s390_j    (code, 4);
2518                                 s390_word (code, ins->inst_offset);
2519                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2520                                 s390_st   (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
2521                         }
2522                 }
2523                         break;
2524                 case OP_LOADU4_MEM:
2525                         g_assert_not_reached ();
2526                         break;
2527                 case OP_LOAD_MEMBASE:
2528                 case OP_LOADI4_MEMBASE:
2529                 case OP_LOADU4_MEMBASE: {
2530                         if (s390_is_uimm12(ins->inst_offset))
2531                                 s390_l    (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
2532                         else {
2533                                 if (s390_is_imm16(ins->inst_offset)) {
2534                                         s390_lhi (code, s390_r13, ins->inst_offset);
2535                                         s390_l   (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
2536                                 } else {
2537                                         s390_basr (code, s390_r13, 0);
2538                                         s390_j    (code, 4);
2539                                         s390_word (code, ins->inst_offset);
2540                                         s390_l    (code, s390_r13, 0, s390_r13, 4);
2541                                         s390_l    (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
2542                                 }
2543                         }
2544                 }
2545                         break;
2546                 case OP_LOADU1_MEMBASE: {
2547                         s390_lhi (code, s390_r0, 0);
2548                         if (s390_is_uimm12(ins->inst_offset))
2549                                 s390_ic   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
2550                         else {
2551                                 s390_basr (code, s390_r13, 0);
2552                                 s390_j    (code, 4);
2553                                 s390_word (code, ins->inst_offset);
2554                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2555                                 s390_ic   (code, s390_r0, s390_r13, ins->inst_basereg, 0);
2556                         }
2557                         s390_lr   (code, ins->dreg, s390_r0);
2558                 }
2559                         break;
2560                 case OP_LOADI1_MEMBASE: {
2561                         s390_lhi (code, s390_r0, 0);
2562                         if (s390_is_uimm12(ins->inst_offset))
2563                                 s390_ic   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
2564                         else {
2565                                 s390_basr (code, s390_r13, 0);
2566                                 s390_j    (code, 4);
2567                                 s390_word (code, ins->inst_offset);
2568                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2569                                 s390_ic   (code, s390_r0, s390_r13, ins->inst_basereg, 0);
2570                         }
2571                         s390_lhi  (code, s390_r13, 0x80);
2572                         s390_nr   (code, s390_r13, s390_r0);
2573                         s390_jz   (code, 5);
2574                         s390_lhi  (code, s390_r13, 0xff00);
2575                         s390_or   (code, s390_r0, s390_r13);
2576                         s390_lr   (code, ins->dreg, s390_r0);
2577                 }
2578                         break;
2579                 case OP_LOADU2_MEMBASE: {
2580                         s390_lhi (code, s390_r0, 0);
2581                         if (s390_is_uimm12(ins->inst_offset))
2582                                 s390_icm  (code, s390_r0, 3, ins->inst_basereg, ins->inst_offset);
2583                         else {
2584                                 s390_basr (code, s390_r13, 0);
2585                                 s390_j    (code, 4);
2586                                 s390_word (code, ins->inst_offset);
2587                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2588                                 s390_ar   (code, s390_r13, ins->inst_basereg);
2589                                 s390_icm  (code, s390_r0, 3, s390_r13, 0);
2590                         }
2591                         s390_lr  (code, ins->dreg, s390_r0);
2592                 }
2593                         break;
2594                 case OP_LOADI2_MEMBASE: {
2595                         s390_lhi (code, s390_r0, 0);
2596                         if (s390_is_uimm12(ins->inst_offset))
2597                                 s390_lh   (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_lh   (code, s390_r0, s390_r13, ins->inst_basereg, 0);
2604                         }
2605                         s390_lr  (code, ins->dreg, s390_r0);
2606                 }
2607                         break;
2608                 case CEE_CONV_I1: {
2609                         s390_lhi  (code, s390_r0, 0x80);
2610                         if (ins->dreg != ins->sreg1) {
2611                                 s390_lr   (code, ins->dreg, ins->sreg1);
2612                         }
2613                         s390_nr   (code, s390_r0, ins->sreg1);
2614                         s390_jz   (code, 7);
2615                         s390_lhi  (code, s390_r13, -1);
2616                         s390_sll  (code, s390_r13, 0, 8);
2617                         s390_or   (code, ins->dreg, s390_r13);
2618                 }
2619                         break;
2620                 case CEE_CONV_I2: {
2621                         s390_lhi  (code, s390_r0, 0x80);
2622                         s390_sll  (code, s390_r0, 0, 8);
2623                         if (ins->dreg != ins->sreg1) {
2624                                 s390_lr   (code, ins->dreg, ins->sreg1);
2625                         }
2626                         s390_nr   (code, s390_r0, ins->sreg1);
2627                         s390_jz   (code, 7);
2628                         s390_lhi  (code, s390_r13, -1);
2629                         s390_sll  (code, s390_r13, 0, 16);
2630                         s390_or   (code, ins->dreg, s390_r13);
2631                 }
2632                         break;
2633                 case CEE_CONV_U1: {
2634                         s390_lhi  (code, s390_r0, 0xff);
2635                         if (ins->dreg != ins->sreg1) {
2636                                 s390_lr   (code, ins->dreg, ins->sreg1);
2637                         }
2638                         s390_nr   (code, ins->dreg, s390_r0);
2639                 }
2640                         break;
2641                 case CEE_CONV_U2: {
2642                         s390_lhi  (code, s390_r0, -1);
2643                         s390_sll  (code, s390_r0, 0, 16);
2644                         s390_srl  (code, s390_r0, 0, 16);
2645                         if (ins->dreg != ins->sreg1) {
2646                                 s390_lr   (code, ins->dreg, ins->sreg1);
2647                         }
2648                         s390_nr   (code, ins->dreg, s390_r0);
2649                 }
2650                         break;
2651                 case OP_COMPARE: {
2652                         next = mono_inst_list_next (&ins->node, &bb->ins_list);
2653                         if ((next) &&
2654                             (((next->opcode >= CEE_BNE_UN) &&
2655                               (next->opcode <= CEE_BLT_UN)) ||
2656                              ((next->opcode >= OP_COND_EXC_NE_UN) &&
2657                               (next->opcode <= OP_COND_EXC_LT_UN)) ||
2658                              ((next->opcode == OP_CLT_UN) ||
2659                               (next->opcode == OP_CGT_UN))))
2660                                 s390_clr  (code, ins->sreg1, ins->sreg2);
2661                         else
2662                                 s390_cr   (code, ins->sreg1, ins->sreg2);
2663                 }
2664                         break;
2665                 case OP_COMPARE_IMM: {
2666                         next = mono_inst_list_next (&ins->node, &bb->ins_list);
2667                         if (s390_is_imm16 (ins->inst_imm)) {
2668                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2669                                 if ((next) &&
2670                                     (((next->opcode >= CEE_BNE_UN) &&
2671                                       (next->opcode <= CEE_BLT_UN)) ||
2672                                      ((next->opcode >= OP_COND_EXC_NE_UN) &&
2673                                       (next->opcode <= OP_COND_EXC_LT_UN)) ||
2674                                      ((next->opcode == OP_CLT_UN) ||
2675                                       (next->opcode == OP_CGT_UN))))
2676                                         s390_clr  (code, ins->sreg1, s390_r0);
2677                                 else
2678                                         s390_cr   (code, ins->sreg1, s390_r0);
2679                         }
2680                         else {
2681                                 s390_basr (code, s390_r13, 0);
2682                                 s390_j    (code, 4);
2683                                 s390_word (code, ins->inst_imm);
2684                                 if ((next) &&
2685                                     (((next->opcode >= CEE_BNE_UN) &&
2686                                       (next->opcode <= CEE_BLT_UN)) ||
2687                                      ((next->opcode >= OP_COND_EXC_NE_UN) &&
2688                                       (next->opcode <= OP_COND_EXC_LT_UN)) ||
2689                                      ((next->opcode == OP_CLT_UN) ||
2690                                       (next->opcode == OP_CGT_UN))))
2691                                         s390_cl   (code, ins->sreg1, 0, s390_r13, 4);
2692                                 else
2693                                         s390_c    (code, ins->sreg1, 0, s390_r13, 4);
2694                         }
2695                 }
2696                         break;
2697                 case OP_BREAK: {
2698                         mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS, mono_break);
2699                         s390_brasl (code, s390_r14, 0);
2700                 }
2701                         break;
2702                 case OP_ADDCC: {
2703                         CHECK_SRCDST_COM;
2704                         s390_alr  (code, ins->dreg, src2);
2705                 }
2706                         break;
2707                 case CEE_ADD: {
2708                         CHECK_SRCDST_COM;
2709                         s390_ar   (code, ins->dreg, src2);
2710                 }
2711                         break;
2712                 case OP_ADC: {
2713                         CHECK_SRCDST_COM;
2714                         s390_alcr (code, ins->dreg, src2);
2715                 }
2716                         break;
2717                 case OP_ADD_IMM: {
2718                         if (ins->dreg != ins->sreg1) {
2719                                 s390_lr   (code, ins->dreg, ins->sreg1);
2720                         }
2721                         next = mono_inst_list_next (&ins->node, &bb->ins_list);
2722                         if ((next) &&
2723                             (next->opcode == OP_ADC_IMM)) {
2724                                 s390_basr (code, s390_r13, 0);
2725                                 s390_j    (code, 4);
2726                                 s390_word (code, ins->inst_imm);
2727                                 s390_a (code, ins->dreg, 0, s390_r13, 4);
2728                         } else {
2729                                 if (s390_is_imm16 (ins->inst_imm)) {
2730                                         s390_ahi  (code, ins->dreg, ins->inst_imm);
2731                                 } else {
2732                                         s390_basr (code, s390_r13, 0);
2733                                         s390_j    (code, 4);
2734                                         s390_word (code, ins->inst_imm);
2735                                         s390_a (code, ins->dreg, 0, s390_r13, 4);
2736                                 }
2737                         }
2738                 }
2739                         break;
2740                 case OP_ADDCC_IMM: {
2741                         next = mono_inst_list_next (&ins->node, &bb->ins_list);
2742                         if ((next) &&
2743                             (next->opcode == OP_ADC_IMM)) {
2744                                 s390_basr (code, s390_r13, 0);
2745                                 s390_j    (code, 4);
2746                                 s390_word (code, ins->inst_imm);
2747                                 if (ins->dreg != ins->sreg1) {
2748                                         s390_lr   (code, ins->dreg, ins->sreg1);
2749                                 }
2750                                 s390_al   (code, ins->dreg, 0, s390_r13, 4);
2751                         } else {
2752                                 if (s390_is_imm16 (ins->inst_imm)) {
2753                                         if (ins->dreg != ins->sreg1) {
2754                                                 s390_lr   (code, ins->dreg, ins->sreg1);
2755                                         }
2756                                         s390_lhi  (code, s390_r0, ins->inst_imm);
2757                                         s390_alcr (code, ins->dreg, s390_r0);
2758                                 } else {
2759                                         s390_basr (code, s390_r13, 0);
2760                                         s390_j    (code, 4);
2761                                         s390_word (code, ins->inst_imm);
2762                                         if (ins->dreg != ins->sreg1) {
2763                                                 s390_lr   (code, ins->dreg, ins->sreg1);
2764                                         }
2765                                         s390_al   (code, ins->dreg, 0, s390_r13, 4);
2766                                 }
2767                         }
2768                 }
2769                         break;
2770                 case OP_ADC_IMM: {
2771                         if (s390_is_imm16 (ins->inst_imm)) {
2772                                 if (ins->dreg != ins->sreg1) {
2773                                         s390_lr   (code, ins->dreg, ins->sreg1);
2774                                 }
2775                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2776                                 s390_alcr (code, ins->dreg, s390_r0);
2777                         } else {
2778                                 s390_basr (code, s390_r13, 0);
2779                                 s390_j    (code, 4);
2780                                 s390_word (code, ins->inst_imm);
2781                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2782                                 s390_alcr (code, ins->dreg, s390_r13);
2783                         }
2784                 }
2785                         break;
2786                 case CEE_ADD_OVF: {
2787                         CHECK_SRCDST_COM;
2788                         s390_ar   (code, ins->dreg, src2);
2789                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2790                 }
2791                         break;
2792                 case CEE_ADD_OVF_UN: {
2793                         CHECK_SRCDST_COM;
2794                         s390_alr  (code, ins->dreg, src2);
2795                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
2796                 }
2797                         break;
2798                 case OP_LADD: {
2799                         s390_alr  (code, s390_r0, ins->sreg1);
2800                         s390_jnc  (code, 4);
2801                         s390_ahi  (code, s390_r1, 1);
2802                         s390_ar   (code, s390_r1, ins->sreg2);
2803                         s390_lr   (code, ins->dreg, s390_r0);
2804                         s390_lr   (code, ins->dreg+1, s390_r1);
2805                 }
2806                         break;
2807                 case OP_LADD_OVF: {
2808                         short int *o[1];
2809                         s390_alr  (code, s390_r0, ins->sreg1);
2810                         s390_jnc  (code, 0); CODEPTR(code, o[0]);
2811                         s390_ahi  (code, s390_r1, 1);
2812                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2813                         PTRSLOT   (code, o[0]);
2814                         s390_ar   (code, s390_r1, ins->sreg2);
2815                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2816                         s390_lr   (code, ins->dreg, s390_r0);
2817                         s390_lr   (code, ins->dreg+1, s390_r1);
2818                 }
2819                         break;
2820                 case OP_LADD_OVF_UN: {
2821                         s390_alr  (code, s390_r0, ins->sreg1);
2822                         s390_alcr (code, s390_r1, ins->sreg2);
2823                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
2824                         s390_lr   (code, ins->dreg, s390_r0);
2825                         s390_lr   (code, ins->dreg+1, s390_r1);
2826                 }
2827                         break;
2828                 case OP_ADD_OVF_CARRY: {
2829                         CHECK_SRCDST_COM;
2830                         s390_lhi  (code, s390_r0, 0);
2831                         s390_lr   (code, s390_r1, s390_r0);
2832                         s390_alcr (code, s390_r0, s390_r1);
2833                         s390_ar   (code, ins->dreg, src2);
2834                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2835                         s390_ar   (code, ins->dreg, s390_r0);
2836                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2837                 }
2838                         break;
2839                 case OP_ADD_OVF_UN_CARRY: {
2840                         CHECK_SRCDST_COM;
2841                         s390_alcr (code, ins->dreg, src2);
2842                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
2843                 }
2844                         break;
2845                 case OP_SUBCC: {
2846                         CHECK_SRCDST_NCOM;
2847                         s390_slr (code, ins->dreg, src2);
2848                 }
2849                         break;
2850                 case CEE_SUB: {
2851                         CHECK_SRCDST_NCOM;
2852                         s390_sr   (code, ins->dreg, src2);
2853                 }
2854                         break;
2855                 case OP_SBB: {
2856                         CHECK_SRCDST_NCOM;
2857                         s390_slbr (code, ins->dreg, src2);
2858                 }
2859                         break;
2860                 case OP_SUBCC_IMM: {
2861                         if (s390_is_imm16 (-ins->inst_imm)) {
2862                                 if (ins->dreg != ins->sreg1) {
2863                                         s390_lr   (code, ins->dreg, ins->sreg1);
2864                                 }
2865                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2866                                 s390_slr  (code, ins->dreg, s390_r0);
2867                         } else {
2868                                 s390_basr (code, s390_r13, 0);
2869                                 s390_j    (code, 4);
2870                                 s390_word (code, ins->inst_imm);
2871                                 if (ins->dreg != ins->sreg1) {
2872                                         s390_lr   (code, ins->dreg, ins->sreg1);
2873                                 }
2874                                 s390_sl   (code, ins->dreg, 0, s390_r13, 4);
2875                         }
2876                 }
2877                         break;
2878                 case OP_SUB_IMM: {
2879                         if (s390_is_imm16 (-ins->inst_imm)) {
2880                                 if (ins->dreg != ins->sreg1) {
2881                                         s390_lr   (code, ins->dreg, ins->sreg1);
2882                                 }
2883                                 s390_ahi  (code, ins->dreg, -ins->inst_imm);
2884                         } else {
2885                                 s390_basr (code, s390_r13, 0);
2886                                 s390_j    (code, 4);
2887                                 s390_word (code, ins->inst_imm);
2888                                 if (ins->dreg != ins->sreg1) {
2889                                         s390_lr   (code, ins->dreg, ins->sreg1);
2890                                 }
2891                                 s390_s    (code, ins->dreg, 0, s390_r13, 4);
2892                         }
2893                 }
2894                         break;
2895                 case OP_SBB_IMM: {
2896                         if (ins->dreg != ins->sreg1) {
2897                                 s390_lr    (code, ins->dreg, ins->sreg1);
2898                         }
2899                         if (s390_is_imm16 (-ins->inst_imm)) {
2900                                 s390_lhi   (code, s390_r0, ins->inst_imm);
2901                                 s390_slbr  (code, ins->dreg, s390_r0);
2902                         } else {
2903                                 s390_basr (code, s390_r13, 0);
2904                                 s390_j    (code, 4);
2905                                 s390_word (code, ins->inst_imm);
2906                                 s390_slb  (code, ins->dreg, 0, s390_r13, 4);
2907                         }
2908                 }
2909                         break;
2910                 case CEE_SUB_OVF: {
2911                         CHECK_SRCDST_NCOM;
2912                         s390_sr   (code, ins->dreg, src2);
2913                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2914                 }
2915                         break;
2916                 case CEE_SUB_OVF_UN: {
2917                         CHECK_SRCDST_NCOM;
2918                         s390_slr  (code, ins->dreg, src2);
2919                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
2920                 }
2921                         break;
2922                 case OP_LSUB: {
2923                         s390_lr   (code, s390_r14, ins->sreg2);
2924                         s390_slr  (code, s390_r0, ins->sreg1);
2925                         s390_jnl  (code, 4);
2926                         s390_ahi  (code, s390_r14, 1);
2927                         s390_sr   (code, s390_r1, s390_r14);
2928                         s390_lr   (code, ins->dreg, s390_r0);
2929                         s390_lr   (code, ins->dreg+1, s390_r1);
2930                 }
2931                         break;
2932                 case OP_LSUB_OVF: {
2933                         short int *o[1];
2934                         s390_lr   (code, s390_r14, ins->sreg2);
2935                         s390_slr  (code, s390_r0, ins->sreg1);
2936                         s390_jnl  (code, 0); CODEPTR(code, o[0]);
2937                         s390_ahi  (code, s390_r14, 1);
2938                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2939                         PTRSLOT   (code, o[0]);
2940                         s390_sr   (code, s390_r1, s390_r14);
2941                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2942                         s390_lr   (code, ins->dreg, s390_r0);
2943                         s390_lr   (code, ins->dreg+1, s390_r1);
2944                 }
2945                         break;
2946                 case OP_LSUB_OVF_UN: {
2947                         s390_slr  (code, s390_r0, ins->sreg1);
2948                         s390_slbr (code, s390_r1, ins->sreg2);
2949                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, "OverflowException");
2950                         s390_lr   (code, ins->dreg, s390_r0);
2951                         s390_lr   (code, ins->dreg+1, s390_r1);
2952                 }
2953                         break;
2954                 case OP_SUB_OVF_CARRY: {
2955                         CHECK_SRCDST_NCOM;
2956                         s390_lhi  (code, s390_r0, 0);
2957                         s390_lr   (code, s390_r1, s390_r0);
2958                         s390_slbr (code, s390_r0, s390_r1);
2959                         s390_sr   (code, ins->dreg, src2);
2960                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2961                         s390_ar   (code, ins->dreg, s390_r0);
2962                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2963                 }
2964                         break;
2965                 case OP_SUB_OVF_UN_CARRY: {
2966                         CHECK_SRCDST_NCOM;
2967                         s390_slbr (code, ins->dreg, src2);
2968                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
2969                 }
2970                         break;
2971                 case CEE_AND: {
2972                         if (ins->sreg1 == ins->dreg) {
2973                                 s390_nr   (code, ins->dreg, ins->sreg2);
2974                         }
2975                         else {
2976                                 if (ins->sreg2 == ins->dreg) {
2977                                         s390_nr  (code, ins->dreg, ins->sreg1);
2978                                 }
2979                                 else {
2980                                         s390_lr  (code, ins->dreg, ins->sreg1);
2981                                         s390_nr  (code, ins->dreg, ins->sreg2);
2982                                 }
2983                         }
2984                 }
2985                         break;
2986                 case OP_AND_IMM: {
2987                         if (s390_is_imm16 (ins->inst_imm)) {
2988                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2989                                 if (ins->dreg != ins->sreg1) {
2990                                         s390_lr   (code, ins->dreg, ins->sreg1);
2991                                 }
2992                                 s390_nr   (code, ins->dreg, s390_r0);
2993                         } else {
2994                                 s390_basr (code, s390_r13, 0);
2995                                 s390_j    (code, 4);
2996                                 s390_word (code, ins->inst_imm);
2997                                 if (ins->dreg != ins->sreg1) {
2998                                         s390_lr   (code, ins->dreg, ins->sreg1);
2999                                 }
3000                                 s390_n    (code, ins->dreg, 0, s390_r13, 4);
3001                         }
3002                 }
3003                         break;
3004                 case CEE_DIV: {
3005                         s390_lr   (code, s390_r0, ins->sreg1);
3006                         s390_srda (code, s390_r0, 0, 32);
3007                         s390_dr   (code, s390_r0, ins->sreg2);
3008                         s390_lr   (code, ins->dreg, s390_r1);
3009                 }
3010                         break;
3011                 case CEE_DIV_UN: {
3012                         s390_lr   (code, s390_r0, ins->sreg1);
3013                         s390_srdl (code, s390_r0, 0, 32);
3014                         s390_dlr  (code, s390_r0, ins->sreg2);
3015                         s390_lr   (code, ins->dreg, s390_r1);
3016                 }
3017                         break;
3018                 case OP_DIV_IMM: {
3019                         if (s390_is_imm16 (ins->inst_imm)) {
3020                                 s390_lhi  (code, s390_r13, ins->inst_imm);
3021                                 s390_lr   (code, s390_r0, ins->sreg1);
3022                         } else {
3023                                 s390_basr (code, s390_r13, 0);
3024                                 s390_j    (code, 4);
3025                                 s390_word (code, ins->inst_imm);
3026                                 s390_lr   (code, s390_r0, ins->sreg1);
3027                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3028                         }
3029                         s390_srda (code, s390_r0, 0, 32);
3030                         s390_dr   (code, s390_r0, s390_r13);
3031                         s390_lr   (code, ins->dreg, s390_r1);
3032                 }
3033                         break;
3034                 case CEE_REM: {
3035                         s390_lr   (code, s390_r0, ins->sreg1);
3036                         s390_srda (code, s390_r0, 0, 32);
3037                         s390_dr   (code, s390_r0, ins->sreg2);
3038                         s390_lr   (code, ins->dreg, s390_r0);
3039                         break;
3040                 case CEE_REM_UN:
3041                         s390_lr   (code, s390_r0, ins->sreg1);
3042                         s390_srdl (code, s390_r0, 0, 32);
3043                         s390_dlr  (code, s390_r0, ins->sreg2);
3044                         s390_lr   (code, ins->dreg, s390_r0);
3045                 }
3046                         break;
3047                 case OP_REM_IMM: {
3048                         if (s390_is_imm16 (ins->inst_imm)) {
3049                                 s390_lhi  (code, s390_r13, ins->inst_imm);
3050                                 s390_lr   (code, s390_r0, ins->sreg1);
3051                         } else {
3052                                 s390_basr (code, s390_r13, 0);
3053                                 s390_j    (code, 4);
3054                                 s390_word (code, ins->inst_imm);
3055                                 s390_lr   (code, s390_r0, ins->sreg1);
3056                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3057                         }
3058                         s390_srda (code, s390_r0, 0, 32);
3059                         s390_dr   (code, s390_r0, s390_r13);
3060                         s390_lr   (code, ins->dreg, s390_r0);
3061                 }
3062                         break;
3063                 case CEE_OR: {
3064                         if (ins->sreg1 == ins->dreg) {
3065                                 s390_or   (code, ins->dreg, ins->sreg2);
3066                         }
3067                         else {
3068                                 if (ins->sreg2 == ins->dreg) {
3069                                         s390_or  (code, ins->dreg, ins->sreg1);
3070                                 }
3071                                 else {
3072                                         s390_lr  (code, ins->dreg, ins->sreg1);
3073                                         s390_or  (code, ins->dreg, ins->sreg2);
3074                                 }
3075                         }
3076                 }
3077                         break;
3078                 case OP_OR_IMM: {
3079                         if (s390_is_imm16 (ins->inst_imm)) {
3080                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3081                                 if (ins->dreg != ins->sreg1) {
3082                                         s390_lr   (code, ins->dreg, ins->sreg1);
3083                                 }
3084                                 s390_or   (code, ins->dreg, s390_r0);
3085                         } else {
3086                                 s390_basr (code, s390_r13, 0);
3087                                 s390_j    (code, 4);
3088                                 s390_word (code, ins->inst_imm);
3089                                 if (ins->dreg != ins->sreg1) {
3090                                         s390_lr   (code, ins->dreg, ins->sreg1);
3091                                 }
3092                                 s390_o    (code, ins->dreg, 0, s390_r13, 4);
3093                         }
3094                 }
3095                         break;
3096                 case CEE_XOR: {
3097                         if (ins->sreg1 == ins->dreg) {
3098                                 s390_xr   (code, ins->dreg, ins->sreg2);
3099                         }
3100                         else {
3101                                 if (ins->sreg2 == ins->dreg) {
3102                                         s390_xr  (code, ins->dreg, ins->sreg1);
3103                                 }
3104                                 else {
3105                                         s390_lr  (code, ins->dreg, ins->sreg1);
3106                                         s390_xr  (code, ins->dreg, ins->sreg2);
3107                                 }
3108                         }
3109                 }
3110                         break;
3111                 case OP_XOR_IMM: {
3112                         if (s390_is_imm16 (ins->inst_imm)) {
3113                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3114                                 if (ins->dreg != ins->sreg1) {
3115                                         s390_lr   (code, ins->dreg, ins->sreg1);
3116                                 }
3117                                 s390_xr   (code, ins->dreg, s390_r0);
3118                         } else {
3119                                 s390_basr (code, s390_r13, 0);
3120                                 s390_j    (code, 4);
3121                                 s390_word (code, ins->inst_imm);
3122                                 if (ins->dreg != ins->sreg1) {
3123                                         s390_lr   (code, ins->dreg, ins->sreg1);
3124                                 }
3125                                 s390_x    (code, ins->dreg, 0, s390_r13, 4);
3126                         }
3127                 }
3128                         break;
3129                 case CEE_SHL: {
3130                         CHECK_SRCDST_NCOM;
3131                         s390_sll  (code, ins->dreg, src2, 0);
3132                 }
3133                         break;
3134                 case OP_SHL_IMM: {
3135                         if (ins->sreg1 != ins->dreg) {
3136                                 s390_lr   (code, ins->dreg, ins->sreg1);
3137                         }
3138                         s390_sll  (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3139                 }
3140                         break;
3141                 case CEE_SHR: {
3142                         CHECK_SRCDST_NCOM;
3143                         s390_sra  (code, ins->dreg, src2, 0);
3144                 }
3145                         break;
3146                 case OP_SHR_IMM: {
3147                         if (ins->sreg1 != ins->dreg) {
3148                                 s390_lr   (code, ins->dreg, ins->sreg1);
3149                         }
3150                         s390_sra  (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3151                 }
3152                         break;
3153                 case OP_SHR_UN_IMM: {
3154                         if (ins->sreg1 != ins->dreg) {
3155                                 s390_lr   (code, ins->dreg, ins->sreg1);
3156                         }
3157                         s390_srl  (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3158                 }
3159                         break;
3160                 case CEE_SHR_UN: {
3161                         CHECK_SRCDST_NCOM;
3162                         s390_srl  (code, ins->dreg, src2, 0);
3163                 }
3164                         break;
3165                 case CEE_NOT: {
3166                         if (ins->sreg1 != ins->dreg) {
3167                                 s390_lr   (code, ins->dreg, ins->sreg1);
3168                         }
3169                         s390_lhi (code, s390_r0, -1);
3170                         s390_xr  (code, ins->dreg, s390_r0);
3171                 }
3172                         break;
3173                 case CEE_NEG: {
3174                         s390_lcr (code, ins->dreg, ins->sreg1);
3175                 }
3176                         break;
3177                 case CEE_MUL: {
3178                         if (ins->sreg1 == ins->dreg) {
3179                                 s390_msr  (code, ins->dreg, ins->sreg2);
3180                         }
3181                         else {
3182                                 if (ins->sreg2 == ins->dreg) {
3183                                         s390_msr (code, ins->dreg, ins->sreg1);
3184                                 }
3185                                 else {
3186                                         s390_lr  (code, ins->dreg, ins->sreg1);
3187                                         s390_msr (code, ins->dreg, ins->sreg2);
3188                                 }
3189                         }
3190                 }
3191                         break;
3192                 case OP_MUL_IMM: {
3193                         if (s390_is_imm16 (ins->inst_imm)) {
3194                                 s390_lhi  (code, s390_r13, ins->inst_imm);
3195                         } else {
3196                                 s390_basr (code, s390_r13, 0);
3197                                 s390_j    (code, 4);
3198                                 s390_word (code, ins->inst_imm);
3199 //                              if (ins->dreg != ins->sreg1) {
3200 //                                      s390_lr   (code, ins->dreg, ins->sreg1);
3201 //                              }
3202                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3203                         }
3204                         if (ins->dreg != ins->sreg1) {
3205                                 s390_lr   (code, ins->dreg, ins->sreg1);
3206                         }
3207                         s390_msr  (code, ins->dreg, s390_r13);
3208                 }
3209                         break;
3210                 case CEE_MUL_OVF: {
3211                         short int *o[2];
3212                         s390_ltr  (code, s390_r1, ins->sreg1);
3213                         s390_jz   (code, 0); CODEPTR(code, o[0]);
3214                         s390_ltr  (code, s390_r0, ins->sreg2);
3215                         s390_jnz  (code, 6);
3216                         s390_lhi  (code, s390_r1, 0);
3217                         s390_j    (code, 0); CODEPTR(code, o[1]);
3218                         s390_xr   (code, s390_r0, s390_r1);
3219                         s390_msr  (code, s390_r1, ins->sreg2);
3220                         s390_xr   (code, s390_r0, s390_r1);
3221                         s390_srl  (code, s390_r0, 0, 31);
3222                         s390_ltr  (code, s390_r0, s390_r0);
3223                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3224                         PTRSLOT   (code, o[0]);
3225                         PTRSLOT   (code, o[1]);
3226                         s390_lr   (code, ins->dreg, s390_r1);
3227                 }
3228                         break;
3229                 case CEE_MUL_OVF_UN: {
3230                         s390_lhi  (code, s390_r0, 0);
3231                         s390_lr   (code, s390_r1, ins->sreg1);
3232                         s390_mlr  (code, s390_r0, ins->sreg2);
3233                         s390_ltr  (code, s390_r0, s390_r0);
3234                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3235                         s390_lr   (code, ins->dreg, s390_r1);
3236                 }
3237                         break;
3238                 case OP_LMUL: {
3239                         s390_l    (code, s390_r0, 0, ins->sreg1, 4);
3240                         s390_srda (code, s390_r0, 0, 32);
3241                         s390_m    (code, s390_r0, 0, ins->sreg2, 4);
3242                         s390_l    (code, s390_r0, 0, ins->sreg1, 4);
3243                         s390_srl  (code, s390_r0, 0, 31);
3244                         s390_a    (code, s390_r0, 0, ins->sreg1, 0);
3245                         s390_l    (code, s390_r13, 0, ins->sreg2, 0);
3246                         s390_srl  (code, s390_r13, 0, 31);
3247                         s390_ms   (code, s390_r13, 0, ins->sreg1, 4);
3248                         s390_ar   (code, s390_r0, s390_r13);
3249                         s390_st   (code, s390_r0, 0, ins->dreg, 0);
3250                         s390_st   (code, s390_r1, 0, ins->dreg, 4);
3251                 }
3252                         break;
3253                 case OP_ICONST: {
3254                         if (s390_is_imm16(ins->inst_c0)) {
3255                                 s390_lhi  (code, ins->dreg, ins->inst_c0);
3256                         } else {
3257                                 s390_basr (code, s390_r13, 0);
3258                                 s390_j    (code, 4);
3259                                 s390_word (code, ins->inst_c0);
3260                                 s390_l    (code, ins->dreg, 0, s390_r13, 4);
3261                         }
3262                 }
3263                         break;
3264                 case OP_AOTCONST: {
3265                         s390_basr (code, s390_r13, 0);
3266                         s390_j    (code, 4);
3267                         mono_add_patch_info (cfg, code - cfg->native_code,
3268                                 (MonoJumpInfoType)ins->inst_i1, ins->inst_p0);
3269                         s390_word (code, 0);
3270                         s390_l    (code,ins->dreg, 0, s390_r13, 4);
3271                 }
3272                         break;
3273                 case CEE_CONV_I4:
3274                 case CEE_CONV_U4:
3275                 case OP_MOVE: {
3276                         if (ins->dreg != ins->sreg1) {
3277                                 s390_lr (code, ins->dreg, ins->sreg1);
3278                         }
3279                 }
3280                         break;
3281                 case OP_SETLRET: {
3282                         int saved = ins->sreg1;
3283                         if (ins->sreg1 == s390_r2) {
3284                                 s390_lr (code, s390_r0, ins->sreg1);
3285                                 saved = s390_r0;
3286                         }
3287                         if (ins->sreg2 != s390_r2)
3288                                 s390_lr (code, s390_r2, ins->sreg2);
3289                         if (saved != s390_r3)
3290                                 s390_lr (code, s390_r3, saved);
3291                         break;
3292                 }
3293                 case OP_FMOVE: {
3294                         if (ins->dreg != ins->sreg1) {
3295                                 s390_ldr   (code, ins->dreg, ins->sreg1);
3296                         }
3297                 }
3298                         break;
3299                 case OP_S390_SETF4RET: {
3300                         s390_ledbr (code, ins->dreg, ins->sreg1);
3301                 }
3302                         break;
3303                 case OP_TLS_GET: {
3304                         if (s390_is_imm16 (ins->inst_offset)) {
3305                                 s390_lhi (code, s390_r13, ins->inst_offset);
3306                         } else {
3307                                 s390_bras (code, s390_r13, 0);
3308                                 s390_j    (code, 4);
3309                                 s390_word (code, ins->inst_offset);
3310                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3311                         }
3312                         s390_ear (code, s390_r1, 0);
3313                         s390_l   (code, ins->dreg, s390_r13, s390_r1, 0);
3314                 }
3315                         break;
3316                 case OP_FCONV_TO_R4: {
3317                         NOT_IMPLEMENTED;
3318                         next = mono_inst_list_next (&ins->node, &bb->ins_list);
3319                         if ((next) &&
3320                              (next->opcode != OP_FMOVE) &&
3321                              (next->opcode != OP_STORER4_MEMBASE_REG))
3322                                 s390_ledbr (code, ins->dreg, ins->sreg1);
3323                 }
3324                         break;
3325                 case OP_JMP: {
3326                         if (cfg->method->save_lmf)
3327                                 restoreLMF(code, cfg->frame_reg, cfg->stack_usage);
3328
3329                         if (cfg->flags & MONO_CFG_HAS_TAIL) {
3330                                 code = emit_load_volatile_registers(code, cfg);
3331                         }
3332
3333                         code = backUpStackPtr(cfg, code, STK_BASE);
3334                         s390_l   (code, s390_r14, 0, STK_BASE, S390_RET_ADDR_OFFSET);
3335                         mono_add_patch_info (cfg, code - cfg->native_code,
3336                                              MONO_PATCH_INFO_METHOD_JUMP,
3337                                              ins->inst_p0);
3338                         s390_jcl (code, S390_CC_UN, 0);
3339                 }
3340                         break;
3341                 case OP_CHECK_THIS: {
3342                         /* ensure ins->sreg1 is not NULL */
3343                         s390_icm (code, s390_r0, 15, ins->sreg1, 0);
3344                 }
3345                         break;
3346                 case OP_ARGLIST: {
3347                         int offset = cfg->sig_cookie + cfg->stack_usage;
3348
3349                         if (s390_is_imm16 (offset))
3350                                 s390_lhi  (code, s390_r0, offset);
3351                         else {
3352                                 s390_basr (code, s390_r13, 0);
3353                                 s390_j    (code, 4);
3354                                 s390_word (code, offset);
3355                                 s390_l    (code, s390_r0, 0, s390_r13, 0);
3356                         }
3357                         s390_ar   (code, s390_r0, cfg->frame_reg);
3358                         s390_st   (code, s390_r0, 0, ins->sreg1, 0);
3359                 }
3360                         break;
3361                 case OP_FCALL: {
3362                         call = (MonoCallInst*)ins;
3363                         if (ins->flags & MONO_INST_HAS_METHOD)
3364                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_METHOD,
3365                                                      call->method);
3366                         else
3367                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS,
3368                                                      call->fptr);
3369                         s390_brasl (code, s390_r14, 0);
3370                         if (call->signature->ret->type == MONO_TYPE_R4)
3371                                 s390_ldebr (code, s390_f0, s390_f0);
3372                 }
3373                         break;
3374                 case OP_LCALL:
3375                 case OP_VCALL:
3376                 case OP_VOIDCALL:
3377                 case OP_CALL: {
3378                         call = (MonoCallInst*)ins;
3379                         if (ins->flags & MONO_INST_HAS_METHOD)
3380                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_METHOD, call->method);
3381                         else
3382                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS, call->fptr);
3383                         s390_brasl (code, s390_r14, 0);
3384                 }
3385                         break;
3386                 case OP_FCALL_REG: {
3387                         call = (MonoCallInst*)ins;
3388                         s390_lr   (code, s390_r1, ins->sreg1);
3389                         s390_basr (code, s390_r14, s390_r1);
3390                         if (call->signature->ret->type == MONO_TYPE_R4)
3391                                 s390_ldebr (code, s390_f0, s390_f0);
3392                 }
3393                         break;
3394                 case OP_LCALL_REG:
3395                 case OP_VCALL_REG:
3396                 case OP_VOIDCALL_REG:
3397                 case OP_CALL_REG: {
3398                         s390_lr   (code, s390_r1, ins->sreg1);
3399                         s390_basr (code, s390_r14, s390_r1);
3400                 }
3401                         break;
3402                 case OP_FCALL_MEMBASE: {
3403                         call = (MonoCallInst*)ins;
3404                         s390_l    (code, s390_r1, 0, ins->sreg1, ins->inst_offset);
3405                         s390_basr (code, s390_r14, s390_r1);
3406                         if (call->signature->ret->type == MONO_TYPE_R4)
3407                                 s390_ldebr (code, s390_f0, s390_f0);
3408                 }
3409                         break;
3410                 case OP_LCALL_MEMBASE:
3411                 case OP_VCALL_MEMBASE:
3412                 case OP_VOIDCALL_MEMBASE:
3413                 case OP_CALL_MEMBASE: {
3414                         s390_l    (code, s390_r1, 0, ins->sreg1, ins->inst_offset);
3415                         s390_basr (code, s390_r14, s390_r1);
3416                 }
3417                         break;
3418                 case OP_OUTARG:
3419                         g_assert_not_reached ();
3420                         break;
3421                 case OP_LOCALLOC: {
3422                         /*------------------------------------------*/
3423                         /* To allocate space on the stack we have   */
3424                         /* to allow room for parameters passed in   */
3425                         /* calls, the backchain pointer and round   */
3426                         /* it to our stack alignment requirements   */
3427                         /*------------------------------------------*/
3428                         int alloca_skip = S390_MINIMAL_STACK_SIZE + cfg->param_area;
3429                         int area_offset = S390_ALIGN(alloca_skip, S390_STACK_ALIGNMENT);
3430                         s390_lr   (code, s390_r1, ins->sreg1);
3431                         if (ins->flags & MONO_INST_INIT)
3432                                 s390_lr   (code, s390_r0, ins->sreg1);
3433                         s390_ahi  (code, s390_r1, 14);
3434                         s390_srl  (code, s390_r1, 0, 3);
3435                         s390_sll  (code, s390_r1, 0, 3);
3436                         if (cfg->method->save_lmf) {
3437                                 /*----------------------------------*/
3438                                 /* we have to adjust lmf ebp value  */
3439                                 /*----------------------------------*/
3440                                 int lmfOffset = cfg->stack_usage - sizeof(MonoLMF);
3441
3442                                 s390_lr (code, s390_r13, cfg->frame_reg);
3443                                 if (s390_is_uimm16(lmfOffset))
3444                                         s390_ahi   (code, s390_r13, lmfOffset);
3445                                 else {
3446                                         s390_basr (code, s390_r14, 0);
3447                                         s390_j    (code, 4);
3448                                         s390_word (code, lmfOffset);
3449                                         s390_a    (code, s390_r13, 0, s390_r14, 4);
3450                                 }
3451                                 s390_lr (code, s390_r14, STK_BASE);
3452                                 s390_sr (code, s390_r14, s390_r1);
3453                                 s390_st (code, s390_r14, 0, s390_r13,
3454                                          G_STRUCT_OFFSET(MonoLMF, ebp));
3455                         }
3456                         s390_l    (code, s390_r13, 0, STK_BASE, 0);
3457                         s390_sr   (code, STK_BASE, s390_r1);
3458                         s390_st   (code, s390_r13, 0, STK_BASE, 0);
3459                         s390_la   (code, ins->dreg, 0, STK_BASE, area_offset);
3460                         s390_srl  (code, ins->dreg, 0, 3);
3461                         s390_sll  (code, ins->dreg, 0, 3);
3462                         if (ins->flags & MONO_INST_INIT) {
3463                                 s390_lr   (code, s390_r1, s390_r0);
3464                                 s390_lr   (code, s390_r0, ins->dreg);
3465                                 s390_lr   (code, s390_r14, s390_r12);
3466                                 s390_lhi  (code, s390_r13, 0);
3467                                 s390_mvcle(code, s390_r0, s390_r12, 0, 0);
3468                                 s390_jo   (code, -2);
3469                                 s390_lr   (code, s390_r12, s390_r14);
3470                         }
3471                 }
3472                         break;
3473                 case OP_THROW: {
3474                         s390_lr (code, s390_r2, ins->sreg1);
3475                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD,
3476                                              (gpointer)"mono_arch_throw_exception");
3477                         s390_brasl (code, s390_r14, 0);
3478                 }
3479                         break;
3480                 case OP_RETHROW: {
3481                         s390_lr (code, s390_r2, ins->sreg1);
3482                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD,
3483                                              (gpointer)"mono_arch_rethrow_exception");
3484                         s390_brasl (code, s390_r14, 0);
3485                 }
3486                         break;
3487                 case OP_START_HANDLER: {
3488                         if (s390_is_uimm12 (ins->inst_left->inst_offset)) {
3489                                 s390_st   (code, s390_r14, 0,
3490                                            ins->inst_left->inst_basereg,
3491                                            ins->inst_left->inst_offset);
3492                         } else {
3493                                 s390_basr (code, s390_r13, 0);
3494                                 s390_j    (code, 4);
3495                                 s390_word (code, ins->inst_left->inst_offset);
3496                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3497                                 s390_st   (code, s390_r14, s390_r13,
3498                                            ins->inst_left->inst_basereg, 0);
3499                         }
3500                 }
3501                         break;
3502                 case OP_ENDFILTER: {
3503                         if (ins->sreg1 != s390_r2)
3504                                 s390_lr (code, s390_r2, ins->sreg1);
3505                         if (s390_is_uimm12 (ins->inst_left->inst_offset)) {
3506                                 s390_l  (code, s390_r14, 0, ins->inst_left->inst_basereg,
3507                                          ins->inst_left->inst_offset);
3508                         } else {
3509                                 s390_basr (code, s390_r13, 0);
3510                                 s390_j    (code, 4);
3511                                 s390_word (code, ins->inst_left->inst_offset);
3512                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3513                                 s390_l    (code, s390_r14, s390_r13,
3514                                            ins->inst_left->inst_basereg, 0);
3515                         }
3516                         s390_br  (code, s390_r14);
3517                 }
3518                         break;
3519                 case OP_ENDFINALLY: {
3520                         if (s390_is_uimm12 (ins->inst_left->inst_offset)) {
3521                                 s390_l  (code, s390_r14, 0, ins->inst_left->inst_basereg,
3522                                          ins->inst_left->inst_offset);
3523                         } else {
3524                                 s390_basr (code, s390_r13, 0);
3525                                 s390_j    (code, 4);
3526                                 s390_word (code, ins->inst_left->inst_offset);
3527                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3528                                 s390_l    (code, s390_r14, s390_r13,
3529                                            ins->inst_left->inst_basereg, 0);
3530                         }
3531                         s390_br  (code, s390_r14);
3532                 }
3533                         break;
3534                 case OP_CALL_HANDLER: {
3535                         mono_add_patch_info (cfg, code-cfg->native_code,
3536                                              MONO_PATCH_INFO_BB, ins->inst_target_bb);
3537                         s390_brasl (code, s390_r14, 0);
3538                 }
3539                         break;
3540                 case OP_LABEL: {
3541                         ins->inst_c0 = code - cfg->native_code;
3542                 }
3543                         break;
3544                 case OP_BR:
3545                         EMIT_UNCOND_BRANCH(ins);
3546                         break;
3547                 case OP_BR_REG: {
3548                         s390_br  (code, ins->sreg1);
3549                 }
3550                         break;
3551                 case OP_CEQ: {
3552                         s390_lhi (code, ins->dreg, 1);
3553                         s390_jz  (code, 4);
3554                         s390_lhi (code, ins->dreg, 0);
3555                 }
3556                         break;
3557                 case OP_CLT: {
3558                         s390_lhi (code, ins->dreg, 1);
3559                         s390_jl  (code, 4);
3560                         s390_lhi (code, ins->dreg, 0);
3561                 }
3562                         break;
3563                 case OP_CLT_UN: {
3564                         s390_lhi (code, ins->dreg, 1);
3565                         s390_jlo (code, 4);
3566                         s390_lhi (code, ins->dreg, 0);
3567                 }
3568                         break;
3569                 case OP_CGT: {
3570                         s390_lhi (code, ins->dreg, 1);
3571                         s390_jh  (code, 4);
3572                         s390_lhi (code, ins->dreg, 0);
3573                 }
3574                         break;
3575                 case OP_CGT_UN: {
3576                         s390_lhi (code, ins->dreg, 1);
3577                         s390_jho (code, 4);
3578                         s390_lhi (code, ins->dreg, 0);
3579                 }
3580                         break;
3581                 case OP_COND_EXC_EQ:
3582                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_EQ, ins->inst_p1);
3583                         break;
3584                 case OP_COND_EXC_NE_UN:
3585                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NE, ins->inst_p1);
3586                         break;
3587                 case OP_COND_EXC_LT:
3588                 case OP_COND_EXC_LT_UN:
3589                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, ins->inst_p1);
3590                         break;
3591                 case OP_COND_EXC_GT:
3592                 case OP_COND_EXC_GT_UN:
3593                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GT, ins->inst_p1);
3594                         break;
3595                 case OP_COND_EXC_GE:
3596                 case OP_COND_EXC_GE_UN:
3597                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GE, ins->inst_p1);
3598                         break;
3599                 case OP_COND_EXC_LE:
3600                 case OP_COND_EXC_LE_UN:
3601                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LE, ins->inst_p1);
3602                         break;
3603                 case OP_COND_EXC_OV:
3604                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, ins->inst_p1);
3605                         break;
3606                 case OP_COND_EXC_NO:
3607                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NO, ins->inst_p1);
3608                         break;
3609                 case OP_COND_EXC_C:
3610                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, ins->inst_p1);
3611                         break;
3612                 case OP_COND_EXC_NC:
3613                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, ins->inst_p1);
3614                         break;
3615                 case CEE_BEQ:
3616                         EMIT_COND_BRANCH (ins, S390_CC_EQ);
3617                         break;
3618                 case CEE_BNE_UN:
3619                         EMIT_COND_BRANCH (ins, S390_CC_NE);
3620                         break;
3621                 case CEE_BLT:
3622                 case CEE_BLT_UN:
3623                         EMIT_COND_BRANCH (ins, S390_CC_LT);
3624                         break;
3625                 case CEE_BGT:
3626                 case CEE_BGT_UN:
3627                         EMIT_COND_BRANCH (ins, S390_CC_GT);
3628                         break;
3629                 case CEE_BGE:
3630                 case CEE_BGE_UN:
3631                         EMIT_COND_BRANCH (ins, S390_CC_GE);
3632                         break;
3633                 case CEE_BLE:
3634                 case CEE_BLE_UN:
3635                         EMIT_COND_BRANCH (ins, S390_CC_LE);
3636                         break;
3637
3638                 /* floating point opcodes */
3639                 case OP_R8CONST: {
3640                         if (*((float *) ins->inst_p0) == 0) {
3641                                 s390_lzdr (code, ins->dreg);
3642                         } else {
3643                                 s390_basr  (code, s390_r13, 0);
3644                                 s390_j     (code, 4);
3645                                 s390_word  (code, ins->inst_p0);
3646                                 s390_l     (code, s390_r13, 0, s390_r13, 4);
3647                                 s390_ld    (code, ins->dreg, 0, s390_r13, 0);
3648                         }
3649                 }
3650                         break;
3651                 case OP_R4CONST: {
3652                         if (*((float *) ins->inst_p0) == 0) {
3653                                 s390_lzdr (code, ins->dreg);
3654                         } else {
3655                                 s390_basr (code, s390_r13, 0);
3656                                 s390_j    (code, 4);
3657                                 s390_word (code, ins->inst_p0);
3658                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3659                                 s390_ldeb (code, ins->dreg, 0, s390_r13, 0);
3660                         }
3661                 }
3662                         break;
3663                 case OP_STORER8_MEMBASE_REG: {
3664                         if (s390_is_uimm12(ins->inst_offset)) {
3665                                 s390_std  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
3666                         } else {
3667                                 s390_basr (code, s390_r13, 0);
3668                                 s390_j    (code, 4);
3669                                 s390_word (code, ins->inst_offset);
3670                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3671                                 s390_std  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
3672                         }
3673                 }
3674                         break;
3675                 case OP_LOADR8_MEMBASE: {
3676                         if (s390_is_uimm12(ins->inst_offset)) {
3677                                 s390_ld   (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
3678                         } else {
3679                                 s390_basr (code, s390_r13, 0);
3680                                 s390_j    (code, 4);
3681                                 s390_word (code, ins->inst_offset);
3682                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3683                                 s390_ld   (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
3684                         }
3685                 }
3686                         break;
3687                 case OP_STORER4_MEMBASE_REG: {
3688                         if (s390_is_uimm12(ins->inst_offset)) {
3689                                 s390_ledbr(code, s390_f15, ins->sreg1);
3690                                 s390_ste  (code, s390_f15, 0, ins->inst_destbasereg, ins->inst_offset);
3691                         } else {
3692                                 s390_basr (code, s390_r13, 0);
3693                                 s390_j    (code, 4);
3694                                 s390_word (code, ins->inst_offset);
3695                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3696                                 s390_ledbr(code, s390_f15, ins->sreg1);
3697                                 s390_ste  (code, s390_f15, s390_r13, ins->inst_destbasereg, 0);
3698                         }
3699                 }
3700                         break;
3701                 case OP_LOADR4_MEMBASE: {
3702                         if (s390_is_uimm12(ins->inst_offset)) {
3703                                 s390_ldeb (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
3704                         } else {
3705                                 s390_basr (code, s390_r13, 0);
3706                                 s390_j    (code, 4);
3707                                 s390_word (code, ins->inst_offset);
3708                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3709                                 s390_ldeb (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
3710                         }
3711                 }
3712                         break;
3713                 case CEE_CONV_R_UN: {
3714                         s390_cdfbr (code, ins->dreg, ins->sreg1);
3715                         s390_ltr   (code, ins->sreg1, ins->sreg1);
3716                         s390_jnl   (code, 12);
3717                         s390_basr  (code, s390_r13, 0);
3718                         s390_j     (code, 6);
3719                         s390_word  (code, 0x41f00000);
3720                         s390_word  (code, 0);
3721                         s390_adb   (code, ins->dreg, 0, s390_r13, 4);
3722                 }
3723                         break;
3724                 case CEE_CONV_R4: {
3725                         s390_cdfbr (code, ins->dreg, ins->sreg1);
3726                 }
3727                         break;
3728                 case CEE_CONV_R8: {
3729                         s390_cdfbr (code, ins->dreg, ins->sreg1);
3730                 }
3731                         break;
3732                 case OP_FCONV_TO_I1:
3733                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 1, TRUE);
3734                         break;
3735                 case OP_FCONV_TO_U1:
3736                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 1, FALSE);
3737                         break;
3738                 case OP_FCONV_TO_I2:
3739                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 2, TRUE);
3740                         break;
3741                 case OP_FCONV_TO_U2:
3742                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 2, FALSE);
3743                         break;
3744                 case OP_FCONV_TO_I4:
3745                 case OP_FCONV_TO_I:
3746                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 4, TRUE);
3747                         break;
3748                 case OP_FCONV_TO_U4:
3749                 case OP_FCONV_TO_U:
3750                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 4, FALSE);
3751                         break;
3752                 case OP_FCONV_TO_I8:
3753                 case OP_FCONV_TO_U8:
3754                         g_assert_not_reached ();
3755                         /* Implemented as helper calls */
3756                         break;
3757                 case OP_LCONV_TO_R_UN:
3758                         g_assert_not_reached ();
3759                         /* Implemented as helper calls */
3760                         break;
3761                 case OP_LCONV_TO_OVF_I: {
3762                         /* Valid ints: 0xffffffff:8000000 to 00000000:0x7f000000 */
3763                         short int *o[5];
3764                         s390_ltr  (code, ins->sreg1, ins->sreg1);
3765                         s390_jnl  (code, 0); CODEPTR(code, o[0]);
3766                         s390_ltr  (code, ins->sreg2, ins->sreg2);
3767                         s390_jnl  (code, 0); CODEPTR(code, o[1]);
3768                         s390_lhi  (code, s390_r13, -1);
3769                         s390_cr   (code, ins->sreg2, s390_r13);
3770                         s390_jnz  (code, 0); CODEPTR(code, o[2]);
3771                         if (ins->dreg != ins->sreg1)
3772                                 s390_lr   (code, ins->dreg, ins->sreg1);
3773                         s390_j    (code, 0); CODEPTR(code, o[3]);
3774                         PTRSLOT(code, o[0]);
3775                         s390_ltr  (code, ins->sreg2, ins->sreg2);
3776                         s390_jz   (code, 0); CODEPTR(code, o[4]);
3777                         PTRSLOT(code, o[1]);
3778                         PTRSLOT(code, o[2]);
3779                         mono_add_patch_info (cfg, code - cfg->native_code,
3780                                              MONO_PATCH_INFO_EXC, "OverflowException");
3781                         s390_brasl (code, s390_r14, 0);
3782                         PTRSLOT(code, o[3]);
3783                         PTRSLOT(code, o[4]);
3784                 }
3785                         break;
3786                 case OP_SQRT: {
3787                         s390_sqdbr (code, ins->dreg, ins->sreg1);
3788                 }
3789                         break;
3790                 case OP_FADD: {
3791                         CHECK_SRCDST_COM_F;
3792                         s390_adbr (code, ins->dreg, src2);
3793                 }
3794                         break;
3795                 case OP_FSUB: {
3796                         CHECK_SRCDST_NCOM_F;
3797                         s390_sdbr (code, ins->dreg, src2);
3798                 }
3799                         break;
3800                 case OP_FMUL: {
3801                         CHECK_SRCDST_COM_F;
3802                         s390_mdbr (code, ins->dreg, src2);
3803                 }
3804                         break;
3805                 case OP_FDIV: {
3806                         CHECK_SRCDST_NCOM_F;
3807                         s390_ddbr (code, ins->dreg, src2);
3808                 }
3809                         break;
3810                 case OP_FNEG: {
3811                         s390_lcdbr (code, ins->dreg, ins->sreg1);
3812                 }
3813                         break;
3814                 case OP_FREM: {
3815                         CHECK_SRCDST_NCOM_F;
3816                         s390_didbr (code, ins->dreg, src2, 5, s390_f15);
3817                 }
3818                         break;
3819                 case OP_FCOMPARE: {
3820                         s390_cdbr (code, ins->sreg1, ins->sreg2);
3821                 }
3822                         break;
3823                 case OP_FCEQ: {
3824                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3825                         s390_lhi   (code, ins->dreg, 1);
3826                         s390_je    (code, 4);
3827                         s390_lhi   (code, ins->dreg, 0);
3828                 }
3829                         break;
3830                 case OP_FCLT: {
3831                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3832                         s390_lhi   (code, ins->dreg, 1);
3833                         s390_jl    (code, 4);
3834                         s390_lhi   (code, ins->dreg, 0);
3835                 }
3836                         break;
3837                 case OP_FCLT_UN: {
3838                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3839                         s390_lhi   (code, ins->dreg, 1);
3840                         s390_jlo   (code, 4);
3841                         s390_lhi   (code, ins->dreg, 0);
3842                 }
3843                         break;
3844                 case OP_FCGT: {
3845                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3846                         s390_lhi   (code, ins->dreg, 1);
3847                         s390_jh    (code, 4);
3848                         s390_lhi   (code, ins->dreg, 0);
3849                 }
3850                         break;
3851                 case OP_FCGT_UN: {
3852                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3853                         s390_lhi   (code, ins->dreg, 1);
3854                         s390_jho   (code, 4);
3855                         s390_lhi   (code, ins->dreg, 0);
3856                 }
3857                         break;
3858                 case OP_FBEQ: {
3859                         short *o;
3860                         s390_jo (code, 0); CODEPTR(code, o);
3861                         EMIT_COND_BRANCH (ins, S390_CC_EQ);
3862                         PTRSLOT(code, o);
3863                 }
3864                         break;
3865                 case OP_FBNE_UN:
3866                         EMIT_COND_BRANCH (ins, S390_CC_NE|S390_CC_OV);
3867                         break;
3868                 case OP_FBLT: {
3869                         short *o;
3870                         s390_jo (code, 0); CODEPTR(code, o);
3871                         EMIT_COND_BRANCH (ins, S390_CC_LT);
3872                         PTRSLOT(code, o);
3873                 }
3874                         break;
3875                 case OP_FBLT_UN:
3876                         EMIT_COND_BRANCH (ins, S390_CC_LT|S390_CC_OV);
3877                         break;
3878                 case OP_FBGT: {
3879                         short *o;
3880                         s390_jo (code, 0); CODEPTR(code, o);
3881                         EMIT_COND_BRANCH (ins, S390_CC_GT);
3882                         PTRSLOT(code, o);
3883                 }
3884                         break;
3885                 case OP_FBGT_UN:
3886                         EMIT_COND_BRANCH (ins, S390_CC_GT|S390_CC_OV);
3887                         break;
3888                 case OP_FBGE: {
3889                         short *o;
3890                         s390_jo (code, 0); CODEPTR(code, o);
3891                         EMIT_COND_BRANCH (ins, S390_CC_GE);
3892                         PTRSLOT(code, o);
3893                 }
3894                         break;
3895                 case OP_FBGE_UN:
3896                         EMIT_COND_BRANCH (ins, S390_CC_GE|S390_CC_OV);
3897                         break;
3898                 case OP_FBLE: {
3899                         short *o;
3900                         s390_jo (code, 0); CODEPTR(code, o);
3901                         EMIT_COND_BRANCH (ins, S390_CC_LE);
3902                         PTRSLOT(code, o);
3903                 }
3904                         break;
3905                 case OP_FBLE_UN:
3906                         EMIT_COND_BRANCH (ins, S390_CC_LE|S390_CC_OV);
3907                         break;
3908                 case OP_CKFINITE: {
3909                         short *o;
3910                         s390_lhi  (code, s390_r13, 0x7f);
3911                         s390_tcdb (code, ins->sreg1, 0, s390_r13, 0);
3912                         s390_jz   (code, 0); CODEPTR(code, o);
3913                         mono_add_patch_info (cfg, code - cfg->native_code,
3914                                              MONO_PATCH_INFO_EXC, "ArithmeticException");
3915                         s390_brasl (code, s390_r14,0);
3916                         PTRSLOT(code, o);
3917                 }
3918                         break;
3919                 case OP_S390_MOVE: {
3920                         if (ins->backend.size > 0) {
3921                                 if (ins->backend.size <= 256) {
3922                                         s390_mvc  (code, ins->backend.size, ins->dreg,
3923                                                    ins->inst_offset, ins->sreg1, ins->inst_imm);
3924                                 } else {
3925                                         s390_lr   (code, s390_r0, ins->dreg);
3926                                         if (s390_is_imm16 (ins->inst_offset)) {
3927                                                 s390_ahi  (code, s390_r0, ins->inst_offset);
3928                                         } else {
3929                                                 s390_basr (code, s390_r13, 0);
3930                                                 s390_j    (code, 4);
3931                                                 s390_word (code, ins->inst_offset);
3932                                                 s390_a    (code, s390_r0, 0, s390_r13, 4);
3933                                         }
3934                                         s390_lr   (code, s390_r14, s390_r12);
3935                                         s390_lr   (code, s390_r12, ins->sreg1);
3936                                         if (s390_is_imm16 (ins->inst_imm)) {
3937                                                 s390_ahi  (code, s390_r12, ins->inst_imm);
3938                                         } else {
3939                                                 s390_basr (code, s390_r13, 0);
3940                                                 s390_j    (code, 4);
3941                                                 s390_word (code, ins->inst_imm);
3942                                                 s390_a    (code, s390_r12, 0, s390_r13, 4);
3943                                         }
3944                                         s390_lr   (code, s390_r1, ins->sreg1);
3945                                         s390_lr   (code, s390_r13, s390_r1);
3946                                         s390_mvcle(code, s390_r0, s390_r12, 0, 0);
3947                                         s390_jo   (code, -2);
3948                                         s390_lr   (code, s390_r12, s390_r14);
3949                                 }
3950                         }
3951                 }
3952                         break;
3953                 case OP_ATOMIC_ADD_I4: {
3954                         s390_lr  (code, s390_r1, ins->sreg2);
3955                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
3956                         s390_a   (code, s390_r1, 0, ins->inst_basereg, ins->inst_offset);
3957                         s390_cs  (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
3958                         s390_jnz (code, -7);
3959                         s390_lr  (code, ins->dreg, s390_r1);
3960                 }
3961                         break;
3962                 case OP_ATOMIC_ADD_NEW_I4: {
3963                         s390_lr  (code, s390_r1, ins->sreg2);
3964                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
3965                         s390_a   (code, s390_r1, 0, ins->inst_basereg, ins->inst_offset);
3966                         s390_cs  (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
3967                         s390_jnz (code, -7);
3968                         s390_lr  (code, ins->dreg, s390_r1);
3969                 }
3970                         break;
3971                 case OP_ATOMIC_EXCHANGE_I4: {
3972                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
3973                         s390_cs  (code, s390_r0, ins->sreg2, ins->inst_basereg, ins->inst_offset);
3974                         s390_jnz (code, -4);
3975                         s390_lr  (code, ins->dreg, s390_r0);
3976                 }
3977                         break;
3978                 case OP_S390_BKCHAIN: {
3979                         s390_lr  (code, ins->dreg, ins->sreg1);
3980                         if (s390_is_imm16 (cfg->stack_offset)) {
3981                                 s390_ahi (code, ins->dreg, cfg->stack_offset);
3982                         } else {
3983                                 s390_basr (code, s390_r13, 0);
3984                                 s390_j    (code, 6);
3985                                 s390_word (code, cfg->stack_offset);
3986                                 s390_a    (code, ins->dreg, 0, s390_r13, 4);
3987                         }
3988                 }
3989                 case OP_MEMORY_BARRIER: {
3990                 }
3991                         break;
3992                 default:
3993                         g_warning ("unknown opcode %s in %s()\n", mono_inst_name (ins->opcode), __FUNCTION__);
3994                         g_assert_not_reached ();
3995                 }
3996
3997                 if ((cfg->opt & MONO_OPT_BRANCH) && ((code - cfg->native_code - offset) > max_len)) {
3998                         g_warning ("wrong maximal instruction length of instruction %s (expected %d, got %d)",
3999                                    mono_inst_name (ins->opcode), max_len, code - cfg->native_code - offset);
4000                         g_assert_not_reached ();
4001                 }
4002
4003                 cpos += max_len;
4004
4005                 last_offset = offset;
4006         }
4007
4008         cfg->code_len = code - cfg->native_code;
4009 }
4010
4011 /*========================= End of Function ========================*/
4012
4013 /*------------------------------------------------------------------*/
4014 /*                                                                  */
4015 /* Name         - mono_arch_register_lowlevel_calls                 */
4016 /*                                                                  */
4017 /* Function     - Register routines to help with --trace operation. */
4018 /*                                                                  */
4019 /*------------------------------------------------------------------*/
4020
4021 void
4022 mono_arch_register_lowlevel_calls (void)
4023 {
4024         mono_register_jit_icall (mono_arch_get_lmf_addr, "mono_arch_get_lmf_addr", NULL, TRUE);
4025 }
4026
4027 /*========================= End of Function ========================*/
4028
4029 /*------------------------------------------------------------------*/
4030 /*                                                                  */
4031 /* Name         - mono_arch_patch_code                              */
4032 /*                                                                  */
4033 /* Function     - Process the patch data created during the         */
4034 /*                instruction build process. This resolves jumps,   */
4035 /*                calls, variables etc.                             */
4036 /*                                                                  */
4037 /*------------------------------------------------------------------*/
4038
4039 void
4040 mono_arch_patch_code (MonoMethod *method, MonoDomain *domain,
4041                       guint8 *code, MonoJumpInfo *ji, gboolean run_cctors)
4042 {
4043         MonoJumpInfo *patch_info;
4044
4045         for (patch_info = ji; patch_info; patch_info = patch_info->next) {
4046                 unsigned char *ip = patch_info->ip.i + code;
4047                 gconstpointer target = NULL;
4048
4049                 target = mono_resolve_patch_target (method, domain, code,
4050                                                     patch_info, run_cctors);
4051
4052                 switch (patch_info->type) {
4053                         case MONO_PATCH_INFO_IP:
4054                         case MONO_PATCH_INFO_EXC_NAME:
4055                         case MONO_PATCH_INFO_LDSTR:
4056                         case MONO_PATCH_INFO_TYPE_FROM_HANDLE:
4057                         case MONO_PATCH_INFO_LDTOKEN:
4058                         case MONO_PATCH_INFO_EXC:
4059                                 continue;
4060                         case MONO_PATCH_INFO_SWITCH:
4061                                 /*----------------------------------*/
4062                                 /* ip points at the basr r13,0/j +4 */
4063                                 /* instruction the vtable value     */
4064                                 /* follows this (i.e. ip+6)         */
4065                                 /*----------------------------------*/
4066                                 *((gconstpointer *)(ip+6)) = target;
4067                                 target = NULL;
4068                                 continue;
4069                         case MONO_PATCH_INFO_METHODCONST:
4070                         case MONO_PATCH_INFO_CLASS:
4071                         case MONO_PATCH_INFO_IMAGE:
4072                         case MONO_PATCH_INFO_FIELD:
4073                         case MONO_PATCH_INFO_IID:
4074                                 target = S390_RELATIVE(target, ip);
4075                                 continue;
4076                         case MONO_PATCH_INFO_R4:
4077                         case MONO_PATCH_INFO_R8:
4078                         case MONO_PATCH_INFO_METHOD_REL:
4079                                 g_assert_not_reached ();
4080                                 continue;
4081                         default:
4082                                 target = S390_RELATIVE(target, ip);
4083                                 ip += 2;
4084                 }
4085                 s390_patch (ip, (guint32) target);
4086         }
4087 }
4088
4089 /*========================= End of Function ========================*/
4090
4091 /*------------------------------------------------------------------*/
4092 /*                                                                  */
4093 /* Name         - emit_load_volatile_registers                      */
4094 /*                                                                  */
4095 /* Function     - Create the instruction sequence for loading the   */
4096 /*                parameter registers for use with the 'tail' op.   */
4097 /*                                                                  */
4098 /*                The register loading operations performed here    */
4099 /*                are the mirror of the store operations performed  */
4100 /*                in mono_arch_emit_prolog and need to be kept in   */
4101 /*                synchronization with it.                          */
4102 /*                                                                  */
4103 /*------------------------------------------------------------------*/
4104
4105 guint8 *
4106 emit_load_volatile_registers(guint8 * code, MonoCompile *cfg)
4107 {
4108         MonoMethod *method = cfg->method;
4109         MonoMethodSignature *sig;
4110         MonoInst *inst;
4111         int pos, i;
4112         CallInfo *cinfo;
4113         size_data sz;
4114
4115         sig = mono_method_signature (method);
4116         pos = 0;
4117
4118         cinfo = calculate_sizes (NULL, sig, &sz, sig->pinvoke);
4119
4120         if (cinfo->struct_ret) {
4121                 ArgInfo *ainfo = &cinfo->ret;
4122                 inst         = cfg->ret;
4123                 s390_l (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4124         }
4125
4126         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
4127                 ArgInfo *ainfo = cinfo->args + i;
4128                 inst = cfg->args [pos];
4129
4130                 if (inst->opcode == OP_REGVAR) {
4131                         if (ainfo->regtype == RegTypeGeneral)
4132                                 s390_lr (code, ainfo->reg, inst->dreg);
4133                         else if (ainfo->regtype == RegTypeFP) {
4134                                 if (inst->dreg != ainfo->reg) {
4135                                         if (ainfo->size == 4) {
4136                                                 s390_ldebr (code, ainfo->reg, inst->dreg);
4137                                         } else {
4138                                                 s390_ldr   (code, ainfo->reg, inst->dreg);
4139                                         }
4140                                 }
4141                         }
4142                         else if (ainfo->regtype == RegTypeBase) {
4143                         } else
4144                                 g_assert_not_reached ();
4145                 } else {
4146                         if (ainfo->regtype == RegTypeGeneral) {
4147                                 if (!((ainfo->reg >= 2) && (ainfo->reg <= 6)))
4148                                         g_assert_not_reached();
4149                                 switch (ainfo->size) {
4150                                 case 1:
4151                                         s390_ic (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4152                                         break;
4153                                 case 2:
4154                                         s390_lh (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4155                                         break;
4156                                 case 8:
4157                                         s390_lm (code, ainfo->reg, ainfo->reg + 1,
4158                                                   inst->inst_basereg, inst->inst_offset);
4159                                         break;
4160                                 default:
4161                                         s390_l  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4162                                 }
4163                         } else if (ainfo->regtype == RegTypeBase) {
4164                         } else if (ainfo->regtype == RegTypeFP) {
4165                                 if (ainfo->size == 8)
4166                                         s390_ld (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4167                                 else if (ainfo->size == 4)
4168                                         s390_le (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4169                                 else
4170                                         g_assert_not_reached ();
4171                         } else if (ainfo->regtype == RegTypeStructByVal) {
4172                                 if (ainfo->reg != STK_BASE) {
4173                                         switch (ainfo->size) {
4174                                         case 1:
4175                                                 s390_ic (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4176                                                 break;
4177                                         case 2:
4178                                                 s390_lh (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4179                                                 break;
4180                                         case 4:
4181                                                 s390_l  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4182                                                 break;
4183                                         case 8:
4184                                                 s390_lm (code, ainfo->reg, ainfo->reg+1, inst->inst_basereg, inst->inst_offset);
4185                                                 break;
4186                                         }
4187                                 }
4188                         } else if (ainfo->regtype == RegTypeStructByAddr) {
4189                                 if (ainfo->reg != STK_BASE) {
4190                                         s390_l  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4191                                 }
4192                         } else
4193                                 g_assert_not_reached ();
4194                 }
4195                 pos++;
4196         }
4197
4198         g_free (cinfo);
4199
4200         return code;
4201 }
4202
4203 /*========================= End of Function ========================*/
4204
4205 /*------------------------------------------------------------------*/
4206 /*                                                                  */
4207 /* Name         - mono_arch_emit_prolog                             */
4208 /*                                                                  */
4209 /* Function     - Create the instruction sequence for a function    */
4210 /*                prolog.                                           */
4211 /*                                                                  */
4212 /*------------------------------------------------------------------*/
4213
4214 guint8 *
4215 mono_arch_emit_prolog (MonoCompile *cfg)
4216 {
4217         MonoMethod *method = cfg->method;
4218         MonoBasicBlock *bb;
4219         MonoMethodSignature *sig;
4220         MonoInst *inst;
4221         int alloc_size, pos, max_offset, i;
4222         guint8 *code;
4223         CallInfo *cinfo;
4224         size_data sz;
4225         int tracing = 0;
4226         int lmfOffset;                                                          \
4227
4228         if (mono_jit_trace_calls != NULL && mono_trace_eval (method))
4229                 tracing = 1;
4230
4231         cfg->code_size   = 512;
4232         cfg->native_code = code = g_malloc (cfg->code_size);
4233
4234         s390_stm  (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
4235
4236         if (cfg->flags & MONO_CFG_HAS_ALLOCA) {
4237                 cfg->used_int_regs |= 1 << 11;
4238         }
4239
4240         alloc_size = cfg->stack_offset;
4241
4242         cfg->stack_usage = alloc_size;
4243         s390_lr   (code, s390_r11, STK_BASE);
4244         if (s390_is_uimm16 (alloc_size)) {
4245                 s390_ahi  (code, STK_BASE, -alloc_size);
4246         } else {
4247                 int stackSize = alloc_size;
4248                 while (stackSize > 32767) {
4249                         s390_ahi  (code, STK_BASE, -32767);
4250                         stackSize -= 32767;
4251                 }
4252                 s390_ahi  (code, STK_BASE, -stackSize);
4253         }
4254         s390_st   (code, s390_r11, 0, STK_BASE, 0);
4255
4256         if (cfg->frame_reg != STK_BASE)
4257                 s390_lr (code, s390_r11, STK_BASE);
4258
4259         /* compute max_offset in order to use short forward jumps
4260          * we always do it on s390 because the immediate displacement
4261          * for jumps is too small
4262          */
4263         max_offset = 0;
4264         for (bb = cfg->bb_entry; bb; bb = bb->next_bb) {
4265                 MonoInst *ins;
4266                 bb->max_offset = max_offset;
4267
4268                 if (cfg->prof_options & MONO_PROFILE_COVERAGE)
4269                         max_offset += 6;
4270
4271                 MONO_BB_FOR_EACH_INS (bb, ins)
4272                         max_offset += ((guint8 *)ins_get_spec (ins->opcode))[MONO_INST_LEN];
4273         }
4274
4275         /* load arguments allocated to register from the stack */
4276         sig = mono_method_signature (method);
4277         pos = 0;
4278
4279         cinfo = calculate_sizes (cfg, sig, &sz, sig->pinvoke);
4280
4281         if (cinfo->struct_ret) {
4282                 ArgInfo *ainfo = &cinfo->ret;
4283                 inst         = cfg->ret;
4284                 inst->backend.size = ainfo->vtsize;
4285                 s390_st (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4286         }
4287
4288         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
4289                 ArgInfo *ainfo = cinfo->args + i;
4290                 inst = cfg->args [pos];
4291
4292                 if (inst->opcode == OP_REGVAR) {
4293                         if (ainfo->regtype == RegTypeGeneral)
4294                                 s390_lr (code, inst->dreg, ainfo->reg);
4295                         else if (ainfo->regtype == RegTypeFP) {
4296                                 if (inst->dreg != ainfo->reg) {
4297                                         if (ainfo->size == 4) {
4298                                                 s390_ledbr (code, inst->dreg, ainfo->reg);
4299                                         } else {
4300                                                 s390_ldr   (code, inst->dreg, ainfo->reg);
4301                                         }
4302                                 }
4303                         }
4304                         else if (ainfo->regtype == RegTypeBase) {
4305                                 s390_lr  (code, s390_r13, STK_BASE);
4306                                 s390_ahi (code, s390_r13, alloc_size);
4307                                 s390_l   (code, inst->dreg, 0, s390_r13, ainfo->offset);
4308                         } else
4309                                 g_assert_not_reached ();
4310
4311                         if (cfg->verbose_level > 2)
4312                                 g_print ("Argument %d assigned to register %s\n",
4313                                          pos, mono_arch_regname (inst->dreg));
4314                 } else {
4315                         if (ainfo->regtype == RegTypeGeneral) {
4316                                 if (!((ainfo->reg >= 2) && (ainfo->reg <= 6)))
4317                                         g_assert_not_reached();
4318                                 switch (ainfo->size) {
4319                                 case 1:
4320                                         s390_stc (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4321                                         break;
4322                                 case 2:
4323                                         s390_sth (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4324                                         break;
4325                                 case 8:
4326                                         s390_stm (code, ainfo->reg, ainfo->reg + 1,
4327                                                   inst->inst_basereg, inst->inst_offset);
4328                                         break;
4329                                 default:
4330                                         s390_st  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4331                                 }
4332                         } else if (ainfo->regtype == RegTypeBase) {
4333                         } else if (ainfo->regtype == RegTypeFP) {
4334                                 if (ainfo->size == 8)
4335                                         s390_std (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4336                                 else if (ainfo->size == 4)
4337                                         s390_ste (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4338                                 else
4339                                         g_assert_not_reached ();
4340                         } else if (ainfo->regtype == RegTypeStructByVal) {
4341                                 int doffset = inst->inst_offset;
4342                                 int reg;
4343                                 if (ainfo->reg != STK_BASE)
4344                                         reg = ainfo->reg;
4345                                 else {
4346                                         reg = s390_r0;
4347                                         s390_lr  (code, s390_r13, STK_BASE);
4348                                         s390_ahi (code, s390_r13, alloc_size);
4349                                 }
4350                                 switch (ainfo->size) {
4351                                         case 1:
4352                                                 if (ainfo->reg == STK_BASE)
4353                                                         s390_ic  (code, reg, 0, s390_r13, ainfo->offset+3);
4354                                                 s390_stc (code, reg, 0, inst->inst_basereg, doffset);
4355                                                 break;
4356                                         case 2:
4357                                                 if (ainfo->reg == STK_BASE)
4358                                                         s390_lh  (code, reg, 0, s390_r13, ainfo->offset+2);
4359                                                 s390_sth (code, reg, 0, inst->inst_basereg, doffset);
4360                                                 break;
4361                                         case 4:
4362                                                 if (ainfo->reg == STK_BASE)
4363                                                         s390_l   (code, reg, 0, s390_r13, ainfo->offset);
4364                                                 s390_st  (code, reg, 0, inst->inst_basereg, doffset);
4365                                                 break;
4366                                         case 8:
4367                                                 if (ainfo->reg == STK_BASE)
4368                                                         s390_lm  (code, s390_r0, s390_r1, s390_r13, ainfo->offset);
4369                                                 s390_stm (code, reg, reg+1, inst->inst_basereg, doffset);
4370                                                 break;
4371                                 }
4372                         } else if (ainfo->regtype == RegTypeStructByAddr) {
4373                                 if (ainfo->reg != STK_BASE)
4374                                         s390_st  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4375                         } else
4376                                 g_assert_not_reached ();
4377                 }
4378                 pos++;
4379         }
4380
4381         if (method->save_lmf) {
4382                 /*---------------------------------------------------------------*/
4383                 /* we build the MonoLMF structure on the stack - see mini-s390.h */
4384                 /*---------------------------------------------------------------*/
4385                 lmfOffset = alloc_size - sizeof(MonoLMF);
4386
4387                 s390_lr    (code, s390_r13, cfg->frame_reg);
4388                 if (s390_is_uimm16(lmfOffset))
4389                         s390_ahi   (code, s390_r13, lmfOffset);
4390                 else {
4391                         s390_basr (code, s390_r14, 0);
4392                         s390_j    (code, 4);
4393                         s390_word (code, lmfOffset);
4394                         s390_a    (code, s390_r13, 0, s390_r14, 4);
4395                 }
4396
4397                 /*---------------------------------------------------------------*/
4398                 /* Preserve the parameter registers while we fix up the lmf      */
4399                 /*---------------------------------------------------------------*/
4400                 s390_stm   (code, s390_r2, s390_r6, s390_r13,
4401                             G_STRUCT_OFFSET(MonoLMF, pregs[0]));
4402
4403                 /*---------------------------------------------------------------*/
4404                 /* On return from this call r2 have the address of the &lmf      */
4405                 /*---------------------------------------------------------------*/
4406                 mono_add_patch_info (cfg, code - cfg->native_code,
4407                                      MONO_PATCH_INFO_INTERNAL_METHOD,
4408                                      (gpointer)"mono_get_lmf_addr");
4409                 s390_brasl (code, s390_r14, 0);
4410
4411                 /*---------------------------------------------------------------*/
4412                 /* Set lmf.lmf_addr = jit_tls->lmf                               */
4413                 /*---------------------------------------------------------------*/
4414                 s390_st    (code, s390_r2, 0, s390_r13,
4415                             G_STRUCT_OFFSET(MonoLMF, lmf_addr));
4416
4417                 /*---------------------------------------------------------------*/
4418                 /* Get current lmf                                               */
4419                 /*---------------------------------------------------------------*/
4420                 s390_l     (code, s390_r0, 0, s390_r2, 0);
4421
4422                 /*---------------------------------------------------------------*/
4423                 /* Set our lmf as the current lmf                                */
4424                 /*---------------------------------------------------------------*/
4425                 s390_st    (code, s390_r13, 0, s390_r2, 0);
4426
4427                 /*---------------------------------------------------------------*/
4428                 /* Have our lmf.previous_lmf point to the last lmf               */
4429                 /*---------------------------------------------------------------*/
4430                 s390_st    (code, s390_r0, 0, s390_r13,
4431                             G_STRUCT_OFFSET(MonoLMF, previous_lmf));
4432
4433                 /*---------------------------------------------------------------*/
4434                 /* save method info                                              */
4435                 /*---------------------------------------------------------------*/
4436                 s390_basr  (code, s390_r1, 0);
4437                 s390_j     (code, 4);
4438                 s390_word  (code, method);
4439                 s390_l     (code, s390_r1, 0, s390_r1, 4);
4440                 s390_st    (code, s390_r1, 0, s390_r13,
4441                             G_STRUCT_OFFSET(MonoLMF, method));
4442
4443                 /*---------------------------------------------------------------*/
4444                 /* save the current IP                                           */
4445                 /*---------------------------------------------------------------*/
4446                 s390_st    (code, STK_BASE, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, ebp));
4447                 s390_basr  (code, s390_r1, 0);
4448                 s390_la    (code, s390_r1, 0, s390_r1, 0);
4449                 s390_st    (code, s390_r1, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, eip));
4450
4451                 /*---------------------------------------------------------------*/
4452                 /* Save general and floating point registers                     */
4453                 /*---------------------------------------------------------------*/
4454                 s390_stm   (code, s390_r2, s390_r12, s390_r13,
4455                             G_STRUCT_OFFSET(MonoLMF, gregs[2]));
4456                 for (i = 0; i < 16; i++) {
4457                         s390_std  (code, i, 0, s390_r13,
4458                                    G_STRUCT_OFFSET(MonoLMF, fregs[i]));
4459                 }
4460
4461                 /*---------------------------------------------------------------*/
4462                 /* Restore the parameter registers now that we've set up the lmf */
4463                 /*---------------------------------------------------------------*/
4464                 s390_lm    (code, s390_r2, s390_r6, s390_r13,
4465                             G_STRUCT_OFFSET(MonoLMF, pregs[0]));
4466         }
4467
4468         if (tracing)
4469                 code = mono_arch_instrument_prolog(cfg, enter_method, code, TRUE);
4470
4471         cfg->code_len = code - cfg->native_code;
4472         g_free (cinfo);
4473
4474         return code;
4475 }
4476
4477 /*========================= End of Function ========================*/
4478
4479 /*------------------------------------------------------------------*/
4480 /*                                                                  */
4481 /* Name         - mono_arch_emit_epilog                             */
4482 /*                                                                  */
4483 /* Function     - Emit the instructions for a function epilog.      */
4484 /*                                                                  */
4485 /*------------------------------------------------------------------*/
4486
4487 void
4488 mono_arch_emit_epilog (MonoCompile *cfg)
4489 {
4490         MonoMethod *method = cfg->method;
4491         int tracing = 0;
4492         guint8 *code;
4493         int max_epilog_size = 96;
4494
4495         if (cfg->method->save_lmf)
4496                 max_epilog_size += 128;
4497
4498         if (mono_jit_trace_calls != NULL)
4499                 max_epilog_size += 128;
4500
4501         if (cfg->prof_options & MONO_PROFILE_ENTER_LEAVE)
4502                 max_epilog_size += 128;
4503
4504         while ((cfg->code_len + max_epilog_size) > (cfg->code_size - 16)) {
4505                 cfg->code_size  *= 2;
4506                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
4507                 mono_jit_stats.code_reallocs++;
4508         }
4509
4510         code = cfg->native_code + cfg->code_len;
4511
4512         if (mono_jit_trace_calls != NULL && mono_trace_eval (method)) {
4513                 code = mono_arch_instrument_epilog (cfg, leave_method, code, TRUE);
4514                 tracing = 1;
4515         }
4516
4517         if (method->save_lmf)
4518                 restoreLMF(code, cfg->frame_reg, cfg->stack_usage);
4519
4520         if (cfg->flags & MONO_CFG_HAS_ALLOCA)
4521                 s390_l (code, STK_BASE, 0, STK_BASE, 0);
4522         else
4523                 code = backUpStackPtr(cfg, code, STK_BASE);
4524
4525         s390_lm  (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
4526         s390_br  (code, s390_r14);
4527
4528         cfg->code_len = code - cfg->native_code;
4529
4530         g_assert (cfg->code_len < cfg->code_size);
4531
4532 }
4533
4534 /*========================= End of Function ========================*/
4535
4536 /*------------------------------------------------------------------*/
4537 /*                                                                  */
4538 /* Name         - mono_arch_emit_exceptions                         */
4539 /*                                                                  */
4540 /* Function     - Emit the blocks to handle exception conditions.   */
4541 /*                                                                  */
4542 /*------------------------------------------------------------------*/
4543
4544 void
4545 mono_arch_emit_exceptions (MonoCompile *cfg)
4546 {
4547         MonoJumpInfo    *patch_info;
4548         guint8          *code;
4549         int             nThrows = 0,
4550                         exc_count = 0,
4551                         iExc;
4552         guint32         code_size;
4553         MonoClass       *exc_classes [MAX_EXC];
4554         guint8          *exc_throw_start [MAX_EXC];
4555
4556         for (patch_info = cfg->patch_info;
4557              patch_info;
4558              patch_info = patch_info->next) {
4559                 if (patch_info->type == MONO_PATCH_INFO_EXC)
4560                         exc_count++;
4561         }
4562
4563         code_size = exc_count * 26;
4564
4565         while ((cfg->code_len + code_size) > (cfg->code_size - 16)) {
4566                 cfg->code_size  *= 2;
4567                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
4568                 mono_jit_stats.code_reallocs++;
4569         }
4570
4571         code = cfg->native_code + cfg->code_len;
4572
4573         /*---------------------------------------------------------------------*/
4574         /* Add code to raise exceptions                                        */
4575         /*---------------------------------------------------------------------*/
4576         for (patch_info = cfg->patch_info; patch_info; patch_info = patch_info->next) {
4577                 switch (patch_info->type) {
4578                 case MONO_PATCH_INFO_EXC: {
4579                         guint8 *ip = patch_info->ip.i + cfg->native_code;
4580                         MonoClass *exc_class;
4581                         guint32 throw_ip;
4582
4583                         /*-----------------------------------------------------*/
4584                         /* Patch the branch in epilog to come here             */
4585                         /*-----------------------------------------------------*/
4586                         s390_patch (ip + 2, (guint32) (S390_RELATIVE(code,ip)));
4587
4588                         exc_class = mono_class_from_name (mono_defaults.corlib,
4589                                                           "System",
4590                                                           patch_info->data.name);
4591                         g_assert (exc_class);
4592                         throw_ip = patch_info->ip.i;
4593
4594                         for (iExc = 0; iExc < nThrows; ++iExc)
4595                                 if (exc_classes [iExc] == exc_class)
4596                                         break;
4597
4598                         if (iExc < nThrows) {
4599                                 s390_jcl (code, S390_CC_UN, (guint32) exc_throw_start [iExc]);
4600                                 patch_info->type = MONO_PATCH_INFO_NONE;
4601                         } else {
4602
4603                                 if (nThrows < MAX_EXC) {
4604                                         exc_classes [nThrows]     = exc_class;
4605                                         exc_throw_start [nThrows] = code;
4606                                 }
4607
4608                                 /*---------------------------------------------*/
4609                                 /* Patch the parameter passed to the handler   */
4610                                 /*---------------------------------------------*/
4611                                 s390_basr (code, s390_r13, 0);
4612                                 s390_j    (code, 4);
4613                                 s390_word (code, patch_info->data.target);
4614                                 /*---------------------------------------------*/
4615                                 /* Load return address & parameter register    */
4616                                 /*---------------------------------------------*/
4617                                 s390_larl (code, s390_r14, (gsize)S390_RELATIVE((patch_info->ip.i +
4618                                                            cfg->native_code + 8), code));
4619                                 s390_l    (code, s390_r2, 0, s390_r13, 4);
4620                                 /*---------------------------------------------*/
4621                                 /* Reuse the current patch to set the jump     */
4622                                 /*---------------------------------------------*/
4623                                 patch_info->type      = MONO_PATCH_INFO_INTERNAL_METHOD;
4624                                 patch_info->data.name = "mono_arch_throw_exception_by_name";
4625                                 patch_info->ip.i      = code - cfg->native_code;
4626                                 s390_jcl  (code, S390_CC_UN, 0);
4627                         }
4628                         break;
4629                 }
4630                 default:
4631                         /* do nothing */
4632                         break;
4633                 }
4634         }
4635
4636         cfg->code_len = code - cfg->native_code;
4637
4638         g_assert (cfg->code_len < cfg->code_size);
4639
4640 }
4641
4642 /*========================= End of Function ========================*/
4643
4644 /*------------------------------------------------------------------*/
4645 /*                                                                  */
4646 /* Name         - mono_arch_setup_jit_tls_data                      */
4647 /*                                                                  */
4648 /* Function     - Setup the JIT's Thread Level Specific Data.       */
4649 /*                                                                  */
4650 /*------------------------------------------------------------------*/
4651
4652 void
4653 mono_arch_setup_jit_tls_data (MonoJitTlsData *tls)
4654 {
4655
4656         if (!tls_offset_inited) {
4657                 tls_offset_inited = TRUE;
4658
4659 #if HAVE_KW_THREAD
4660 # if 0
4661         __asm__ ("\tear\t%r1,0\n"
4662                  "\tlr\t%0,%3\n"
4663                  "\tsr\t%0,%r1\n"
4664                  "\tlr\t%1,%4\n"
4665                  "\tsr\t%1,%r1\n"
4666                  "\tlr\t%2,%5\n"
4667                  "\tsr\t%2,%r1\n"
4668                  : "=r" (appdomain_tls_offset),
4669                    "=r" (thread_tls_offset),
4670                    "=r" (lmf_tls_offset)
4671                  : "r" (&tls_appdomain),
4672                    "r" (&tls_current_object),
4673                    "r" (&mono_lmf_addr)
4674                  : "1", "cc");
4675 # endif
4676 #endif
4677         }
4678
4679         if (!lmf_addr_key_inited) {
4680                 lmf_addr_key_inited = TRUE;
4681                 pthread_key_create (&lmf_addr_key, NULL);
4682         }
4683         pthread_setspecific (lmf_addr_key, &tls->lmf);
4684
4685 }
4686
4687 /*========================= End of Function ========================*/
4688
4689 /*------------------------------------------------------------------*/
4690 /*                                                                  */
4691 /* Name         - mono_arch_free_jit_tls_data                       */
4692 /*                                                                  */
4693 /* Function     - Free tls data.                                    */
4694 /*                                                                  */
4695 /*------------------------------------------------------------------*/
4696
4697 void
4698 mono_arch_free_jit_tls_data (MonoJitTlsData *tls)
4699 {
4700
4701 }
4702
4703 /*========================= End of Function ========================*/
4704
4705 /*------------------------------------------------------------------*/
4706 /*                                                                  */
4707 /* Name         - mono_arch_emit_this_vret_args                     */
4708 /*                                                                  */
4709 /* Function     -                                                   */
4710 /*                                                                  */
4711 /*------------------------------------------------------------------*/
4712
4713 void
4714 mono_arch_emit_this_vret_args (MonoCompile *cfg, MonoCallInst *inst, int this_reg, int this_type, int vt_reg)
4715 {
4716         int this_dreg = s390_r2;
4717
4718         if (vt_reg != -1)
4719                 this_dreg = s390_r3;
4720
4721         /* add the this argument */
4722         if (this_reg != -1) {
4723                 MonoInst *this;
4724                 MONO_INST_NEW (cfg, this, OP_MOVE);
4725                 this->type  = this_type;
4726                 this->sreg1 = this_reg;
4727                 this->dreg  = mono_regstate_next_int (cfg->rs);
4728                 mono_bblock_add_inst (cfg->cbb, this);
4729                 mono_call_inst_add_outarg_reg (cfg, inst, this->dreg, this_dreg, FALSE);
4730         }
4731
4732         if (vt_reg != -1) {
4733                 MonoInst *vtarg;
4734                 MONO_INST_NEW (cfg, vtarg, OP_MOVE);
4735                 vtarg->type  = STACK_MP;
4736                 vtarg->sreg1 = vt_reg;
4737                 vtarg->dreg  = mono_regstate_next_int (cfg->rs);
4738                 mono_bblock_add_inst (cfg->cbb, vtarg);
4739                 mono_call_inst_add_outarg_reg (cfg, inst, vtarg->dreg, s390_r2, FALSE);
4740         }
4741 }
4742
4743 /*========================= End of Function ========================*/
4744
4745 /*------------------------------------------------------------------*/
4746 /*                                                                  */
4747 /* Name         - mono_arch_get_inst_for_method                   */
4748 /*                                                                  */
4749 /* Function     - Check for opcodes we can handle directly in       */
4750 /*                hardware.                                         */
4751 /*                                                                  */
4752 /*------------------------------------------------------------------*/
4753
4754 MonoInst*
4755 mono_arch_get_inst_for_method (MonoCompile *cfg, MonoMethod *cmethod,
4756                                MonoMethodSignature *fsig, MonoInst **args)
4757 {
4758         MonoInst *ins = NULL;
4759
4760         if (cmethod->klass == mono_defaults.math_class) {
4761                 if (strcmp (cmethod->name, "Sqrt") == 0) {
4762                         MONO_INST_NEW (cfg, ins, OP_SQRT);
4763                         ins->inst_i0 = args [0];
4764                 }
4765         }
4766
4767         return ins;
4768 }
4769
4770 /*========================= End of Function ========================*/
4771
4772 /*------------------------------------------------------------------*/
4773 /*                                                                  */
4774 /* Name         - mono_arch_print_tree                              */
4775 /*                                                                  */
4776 /* Function     - Print platform-specific opcode details.           */
4777 /*                                                                  */
4778 /* Returns      - 1 - opcode details have been printed              */
4779 /*                0 - opcode details have not been printed          */
4780 /*                                                                  */
4781 /*------------------------------------------------------------------*/
4782
4783 gboolean
4784 mono_arch_print_tree (MonoInst *tree, int arity)
4785 {
4786         gboolean done;
4787
4788         switch (tree->opcode) {
4789                 case OP_S390_LOADARG:
4790                 case OP_S390_ARGREG:
4791                 case OP_S390_ARGPTR:
4792                         printf ("[0x%lx(%s)]", tree->inst_offset,
4793                                 mono_arch_regname (tree->inst_basereg));
4794                         done = 1;
4795                         break;
4796                 case OP_S390_STKARG:
4797                         printf ("[0x%lx(previous_frame)]",
4798                                 tree->inst_offset);
4799                         done = 1;
4800                         break;
4801                 case OP_S390_MOVE:
4802                         printf ("[0x%lx(%d,%s),0x%lx(%s)]",
4803                                 tree->inst_offset, tree->backend.size,
4804                                 mono_arch_regname(tree->dreg), tree->inst_imm,
4805                                 mono_arch_regname(tree->sreg1));
4806                         done = 1;
4807                         break;
4808                 case OP_S390_SETF4RET:
4809                         printf ("[%s,%s]",
4810                                 mono_arch_fregname (tree->dreg),
4811                                 mono_arch_fregname (tree->sreg1));
4812                         done = 1;
4813                         break;
4814                 case OP_TLS_GET:
4815                         printf ("[0x%lx(0x%lx,%s)]", tree->inst_offset,
4816                                 tree->inst_imm,
4817                                 mono_arch_regname (tree->sreg1));
4818                         done = 1;
4819                         break;
4820                 case OP_S390_BKCHAIN:
4821                         printf ("[previous_frame(%s)]",
4822                                 mono_arch_regname (tree->sreg1));
4823                         done = 1;
4824                         break;
4825                 default:
4826                         done = 0;
4827         }
4828         return (done);
4829 }
4830
4831 /*========================= End of Function ========================*/
4832
4833 /*------------------------------------------------------------------*/
4834 /*                                                                  */
4835 /* Name         - mono_arch_regalloc_cost                           */
4836 /*                                                                  */
4837 /* Function     - Determine the cost, in the number of memory       */
4838 /*                references, of the action of allocating the var-  */
4839 /*                iable VMV into a register during global register  */
4840 /*                allocation.                                       */
4841 /*                                                                  */
4842 /* Returns      - Cost                                              */
4843 /*                                                                  */
4844 /*------------------------------------------------------------------*/
4845
4846 guint32
4847 mono_arch_regalloc_cost (MonoCompile *cfg, MonoMethodVar *vmv)
4848 {
4849         /* FIXME: */
4850         return 2;
4851 }
4852
4853 /*========================= End of Function ========================*/
4854
4855 /*------------------------------------------------------------------*/
4856 /*                                                                  */
4857 /* Name         - mono_arch_get_domain_intrinsic                    */
4858 /*                                                                  */
4859 /* Function     -                                                   */
4860 /*                                                                  */
4861 /* Returns      -                                                   */
4862 /*                                                                  */
4863 /*------------------------------------------------------------------*/
4864
4865 MonoInst *
4866 mono_arch_get_domain_intrinsic (MonoCompile* cfg)
4867 {
4868         MonoInst *ins;
4869
4870         if (appdomain_tls_offset == -1)
4871                 return NULL;
4872
4873         MONO_INST_NEW (cfg, ins, OP_TLS_GET);
4874         ins->inst_offset = appdomain_tls_offset;
4875         return (ins);
4876 }
4877
4878 /*========================= End of Function ========================*/
4879
4880 /*------------------------------------------------------------------*/
4881 /*                                                                  */
4882 /* Name         - mono_arch_get_thread_intrinsic                    */
4883 /*                                                                  */
4884 /* Function     -                                                   */
4885 /*                                                                  */
4886 /* Returns      -                                                   */
4887 /*                                                                  */
4888 /*------------------------------------------------------------------*/
4889
4890 MonoInst *
4891 mono_arch_get_thread_intrinsic (MonoCompile* cfg)
4892 {
4893         MonoInst *ins;
4894
4895         if (thread_tls_offset == -1)
4896                 return NULL;
4897
4898         MONO_INST_NEW (cfg, ins, OP_TLS_GET);
4899         ins->inst_offset = thread_tls_offset;
4900         return (ins);
4901 }
4902
4903 /*========================= End of Function ========================*/
4904
4905 /*------------------------------------------------------------------*/
4906 /*                                                                  */
4907 /* Name         - mono_arch_flush_register_windows                  */
4908 /*                                                                  */
4909 /* Function     -                                                   */
4910 /*                                                                  */
4911 /* Returns      -                                                   */
4912 /*                                                                  */
4913 /*------------------------------------------------------------------*/
4914
4915 void
4916 mono_arch_flush_register_windows (void)
4917 {
4918 }
4919
4920 /*========================= End of Function ========================*/
4921
4922 /*------------------------------------------------------------------*/
4923 /*                                                                  */
4924 /* Name         - mono_arch_get_lmf_addr                            */
4925 /*                                                                  */
4926 /* Function     -                                                   */
4927 /*                                                                  */
4928 /* Returns      -                                                   */
4929 /*                                                                  */
4930 /*------------------------------------------------------------------*/
4931
4932 gpointer
4933 mono_arch_get_lmf_addr (void)
4934 {
4935         return pthread_getspecific (lmf_addr_key);
4936 }
4937
4938
4939 /*========================= End of Function ========================*/
4940
4941 /*------------------------------------------------------------------*/
4942 /*                                                                  */
4943 /* Name         - mono_arch_get_patch_offset                        */
4944 /*                                                                  */
4945 /* Function     - Dummy entry point until s390x supports aot.       */
4946 /*                                                                  */
4947 /* Returns      - Offset for patch.                                 */
4948 /*                                                                  */
4949 /*------------------------------------------------------------------*/
4950
4951 guint32
4952 mono_arch_get_patch_offset (guint8 *code)
4953 {
4954         return 0;
4955 }
4956
4957 /*========================= End of Function ========================*/