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->vret_addr->opcode = OP_REGVAR;
1659                 cfg->vret_addr->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->vret_addr;
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                 if (G_UNLIKELY (cfg->verbose_level > 1)) {
1691                         printf ("vret_addr =");
1692                         mono_print_ins (cfg->vret_addr);
1693                 }
1694         }
1695
1696         if (sig->hasthis) {
1697                 inst = cfg->args [0];
1698                 if (inst->opcode != OP_REGVAR) {
1699                         inst->opcode       = OP_REGOFFSET;
1700                         inst->inst_basereg = frame_reg;
1701                         offset             = S390_ALIGN(offset, sizeof(gpointer));
1702                         inst->inst_offset  = offset;
1703                         offset            += sizeof (gpointer);
1704                 }
1705                 curinst = sArg = 1;
1706         } else {
1707                 curinst = sArg = 0;
1708         }
1709
1710         eArg = sig->param_count + sArg;
1711
1712         if (sig->call_convention == MONO_CALL_VARARG)
1713                 cfg->sig_cookie += S390_MINIMAL_STACK_SIZE;
1714
1715         for (iParm = sArg; iParm < eArg; ++iParm) {
1716                 inst = cfg->args [curinst];
1717                 if (inst->opcode != OP_REGVAR) {
1718                         switch (cinfo->args[iParm].regtype) {
1719                                 case RegTypeStructByAddr :
1720                                 if (cinfo->args[iParm].reg == STK_BASE) {
1721                                         inst->opcode       = OP_S390_LOADARG;
1722                                         inst->inst_basereg = frame_reg;
1723                                         size               = abs(cinfo->args[iParm].vtsize);
1724                                         offset             = S390_ALIGN(offset, sizeof(long));
1725                                         inst->inst_offset  = offset;
1726                                         inst->backend.arg_info       = cinfo->args[iParm].offset;
1727                                 } else {
1728                                         inst->opcode       = OP_S390_ARGREG;
1729                                         inst->inst_basereg = frame_reg;
1730                                         size               = sizeof(gpointer);
1731                                         offset             = S390_ALIGN(offset, size);
1732                                         inst->inst_offset  = offset;
1733                                         inst->backend.arg_info       = cinfo->args[iParm].offset;
1734                                 }
1735                                         break;
1736                                 case RegTypeStructByVal :
1737                                         inst->opcode       = OP_S390_ARGPTR;
1738                                         inst->inst_basereg = frame_reg;
1739                                         size               = cinfo->args[iParm].size;
1740                                         offset             = S390_ALIGN(offset, size);
1741                                         inst->inst_offset  = offset;
1742                                         inst->backend.arg_info       = cinfo->args[iParm].offset;
1743                                         break;
1744                                 default :
1745                                 if (cinfo->args[iParm].reg != STK_BASE) {
1746                                         inst->opcode       = OP_REGOFFSET;
1747                                         inst->inst_basereg = frame_reg;
1748                                         size               = (cinfo->args[iParm].size < 8
1749                                                               ? sizeof(long)
1750                                                               : sizeof(long long));
1751                                         offset             = S390_ALIGN(offset, size);
1752                                         inst->inst_offset  = offset;
1753                                 } else {
1754                                         inst->opcode       = OP_S390_STKARG;
1755                                         inst->inst_basereg = frame_reg;
1756                                         size               = (cinfo->args[iParm].size < 4
1757                                                               ? 4 - cinfo->args[iParm].size
1758                                                               : 0);
1759                                         inst->inst_offset  = cinfo->args[iParm].offset +
1760                                                              size;
1761                                         inst->backend.arg_info       = 0;
1762                                         size               = sizeof(long);
1763                                 }
1764                         }
1765                         if ((sig->call_convention == MONO_CALL_VARARG) &&
1766                             (cinfo->args[iParm].regtype != RegTypeGeneral) &&
1767                             (iParm < sig->sentinelpos))
1768                                 cfg->sig_cookie += size;
1769
1770                         offset += size;
1771                 }
1772                 curinst++;
1773         }
1774
1775         curinst = cfg->locals_start;
1776         for (iVar = curinst; iVar < cfg->num_varinfo; ++iVar) {
1777                 inst = cfg->varinfo [iVar];
1778                 if ((inst->flags & MONO_INST_IS_DEAD) ||
1779                     (inst->opcode == OP_REGVAR))
1780                         continue;
1781
1782                 /*--------------------------------------------------*/
1783                 /* inst->backend.is_pinvoke indicates native sized value types, */
1784                 /* this is used by the pinvoke wrappers when they   */
1785                 /* call functions returning structure               */
1786                 /*--------------------------------------------------*/
1787                 if (inst->backend.is_pinvoke && MONO_TYPE_ISSTRUCT (inst->inst_vtype))
1788                         size = mono_class_native_size (mono_class_from_mono_type(inst->inst_vtype), &align);
1789                 else
1790                         size = mono_type_size (inst->inst_vtype, &align);
1791
1792                 offset             = S390_ALIGN(offset, align);
1793                 inst->inst_offset  = offset;
1794                 inst->opcode       = OP_REGOFFSET;
1795                 inst->inst_basereg = frame_reg;
1796                 offset            += size;
1797                 DEBUG (g_print("allocating local %d to %ld\n", iVar, inst->inst_offset));
1798         }
1799
1800         /*------------------------------------------------------*/
1801         /* Allow space for the trace method stack area if needed*/
1802         /*------------------------------------------------------*/
1803         if (mono_jit_trace_calls != NULL && mono_trace_eval (cfg->method)) {
1804                 offset += S390_TRACE_STACK_SIZE;
1805         }
1806
1807         /*------------------------------------------------------*/
1808         /* Reserve space to save LMF and caller saved registers */
1809         /*------------------------------------------------------*/
1810         if (cfg->method->save_lmf)
1811                 offset += sizeof (MonoLMF);
1812
1813         /*------------------------------------------------------*/
1814         /* align the offset                                     */
1815         /*------------------------------------------------------*/
1816         cfg->stack_offset = S390_ALIGN(offset, S390_STACK_ALIGNMENT);
1817
1818 }
1819
1820 /*========================= End of Function ========================*/
1821
1822 /*------------------------------------------------------------------*/
1823 /*                                                                  */
1824 /* Name         - mono_arch_create_vars                                 */
1825 /*                                                                  */
1826 /*------------------------------------------------------------------*/
1827
1828 void
1829 mono_arch_create_vars (MonoCompile *cfg)
1830 {
1831         MonoMethodSignature *sig;
1832         CallInfo *cinfo;
1833         size_data sz;
1834
1835         sig = mono_method_signature (cfg->method);
1836
1837         cinfo = calculate_sizes (cfg, sig, &sz, sig->pinvoke);
1838
1839         if (cinfo->struct_ret) {
1840                 cfg->vret_addr = mono_compile_create_var (cfg, &mono_defaults.int_class->byval_arg, OP_ARG);
1841                 if (G_UNLIKELY (cfg->verbose_level > 1)) {
1842                         printf ("vret_addr = ");
1843                         mono_print_ins (cfg->vret_addr);
1844                 }
1845         }
1846
1847         g_free (cinfo);
1848 }
1849
1850 /*========================= End of Function ========================*/
1851
1852 /*------------------------------------------------------------------*/
1853 /*                                                                  */
1854 /* Name         - mono_arch_call_opcode                             */
1855 /*                                                                  */
1856 /* Function     - Take the arguments and generate the arch-specific */
1857 /*                instructions to properly call the function. This  */
1858 /*                includes pushing, moving argments to the correct  */
1859 /*                etc.                                              */
1860 /*                                                                  */
1861 /*------------------------------------------------------------------*/
1862
1863 MonoCallInst*
1864 mono_arch_call_opcode (MonoCompile *cfg, MonoBasicBlock* bb,
1865                        MonoCallInst *call, int is_virtual) {
1866         MonoInst *in;
1867         MonoCallArgParm *arg;
1868         MonoMethodSignature *sig;
1869         int i, n, lParamArea;
1870         CallInfo *cinfo;
1871         ArgInfo *ainfo = NULL;
1872         size_data sz;
1873         int stackSize;
1874
1875         sig = call->signature;
1876         n = sig->param_count + sig->hasthis;
1877         DEBUG (g_print ("Call requires: %d parameters\n",n));
1878
1879         cinfo = calculate_sizes (cfg, sig, &sz, sig->pinvoke);
1880
1881         stackSize         = sz.stack_size + sz.local_size + sz.parm_size + sz.offset;
1882         call->stack_usage = MAX(stackSize, call->stack_usage);
1883         lParamArea        = MAX((call->stack_usage-S390_MINIMAL_STACK_SIZE-sz.parm_size), 0);
1884         cfg->param_area   = MAX(((signed) cfg->param_area), lParamArea);
1885         cfg->flags       |= MONO_CFG_HAS_CALLS;
1886
1887         if (cinfo->struct_ret)
1888                 call->used_iregs |= 1 << cinfo->ret.reg;
1889
1890         for (i = 0; i < n; ++i) {
1891                 ainfo = cinfo->args + i;
1892
1893                 if ((sig->call_convention == MONO_CALL_VARARG) &&
1894                     (i == sig->sentinelpos)) {
1895                         emit_sig_cookie (cfg, call, cinfo, ainfo->size);
1896                 }
1897
1898                 if (is_virtual && i == 0) {
1899                         /* the argument will be attached to the call instrucion */
1900                         in = call->args [i];
1901                         call->used_iregs |= 1 << ainfo->reg;
1902                 } else {
1903                         MONO_INST_NEW_CALL_ARG (cfg, arg, OP_OUTARG);
1904                         in                  = call->args [i];
1905                         arg->ins.cil_code   = in->cil_code;
1906                         arg->ins.inst_left  = in;
1907                         arg->ins.type       = in->type;
1908                         MONO_INST_LIST_ADD_TAIL (&arg->ins.node, &call->out_args);
1909                         arg->ins.inst_right = (MonoInst *) call;
1910                         if (ainfo->regtype == RegTypeGeneral) {
1911                                 arg->ins.backend.reg3   = ainfo->reg;
1912                                 call->used_iregs |= 1 << ainfo->reg;
1913                                 if (arg->ins.type == STACK_I8)
1914                                         call->used_iregs |= 1 << (ainfo->reg + 1);
1915                         } else if (ainfo->regtype == RegTypeStructByAddr) {
1916                                 call->used_iregs |= 1 << ainfo->reg;
1917                                 arg->ins.sreg1    = ainfo->reg;
1918                                 arg->ins.opcode   = OP_OUTARG_VT;
1919                                 arg->size         = -ainfo->vtsize;
1920                                 arg->offset       = ainfo->offset;
1921                                 arg->offPrm       = ainfo->offparm + sz.offStruct;
1922                         } else if (ainfo->regtype == RegTypeStructByVal) {
1923                                 if (ainfo->reg != STK_BASE) {
1924                                         switch (ainfo->size) {
1925                                         case 0:
1926                                         case 1:
1927                                         case 2:
1928                                         case 4:
1929                                                 call->used_iregs |= 1 << ainfo->reg;
1930                                                 break;
1931                                         case 8:
1932                                                 call->used_iregs |= 1 << ainfo->reg;
1933                                                 call->used_iregs |= 1 << (ainfo->reg+1);
1934                                                 break;
1935                                         default:
1936                                                 call->used_iregs |= 1 << ainfo->reg;
1937                                         }
1938                                 }
1939                                 arg->ins.sreg1  = ainfo->reg;
1940                                 arg->ins.opcode = OP_OUTARG_VT;
1941                                 arg->size       = ainfo->size;
1942                                 arg->offset     = ainfo->offset;
1943                                 arg->offPrm     = ainfo->offparm + sz.offStruct;
1944                         } else if (ainfo->regtype == RegTypeBase) {
1945                                 arg->ins.opcode   = OP_OUTARG_MEMBASE;
1946                                 arg->ins.sreg1    = ainfo->reg;
1947                                 arg->size         = ainfo->size;
1948                                 arg->offset       = ainfo->offset;
1949                                 call->used_iregs |= 1 << ainfo->reg;
1950                         } else if (ainfo->regtype == RegTypeFP) {
1951                                 arg->ins.backend.reg3   = ainfo->reg;
1952                                 call->used_fregs |= 1 << ainfo->reg;
1953                                 if (ainfo->size == 4)
1954                                         arg->ins.opcode = OP_OUTARG_R4;
1955                                 else
1956                                         arg->ins.opcode = OP_OUTARG_R8;
1957                         } else {
1958                                 g_assert_not_reached ();
1959                         }
1960                 }
1961         }
1962
1963         /*
1964          * Handle the case where there are no implicit arguments
1965          */
1966         if ((sig->call_convention == MONO_CALL_VARARG) &&
1967             (i == sig->sentinelpos)) {
1968                 emit_sig_cookie (cfg, call, cinfo, ainfo->size);
1969         }
1970
1971         g_free (cinfo);
1972         return call;
1973 }
1974
1975 /*========================= End of Function ========================*/
1976
1977 /*------------------------------------------------------------------*/
1978 /*                                                                  */
1979 /* Name         - emit_sig_cookie.                                  */
1980 /*                                                                  */
1981 /* Function     - For variable length parameter lists construct a   */
1982 /*                signature cookie and emit it.                     */
1983 /*                                                                  */
1984 /*------------------------------------------------------------------*/
1985
1986 static void
1987 emit_sig_cookie (MonoCompile *cfg, MonoCallInst *call,
1988                  CallInfo *cinfo, int argSize)
1989 {
1990         MonoCallArgParm *arg;
1991         MonoMethodSignature *tmpSig;
1992         MonoInst *sigArg;
1993
1994         cfg->disable_aot = TRUE;
1995
1996         /*----------------------------------------------------------*/
1997         /* mono_ArgIterator_Setup assumes the signature cookie is   */
1998         /* passed first and all the arguments which were before it  */
1999         /* passed on the stack after the signature. So compensate   */
2000         /* by passing a different signature.                        */
2001         /*----------------------------------------------------------*/
2002         tmpSig = mono_metadata_signature_dup (call->signature);
2003         tmpSig->param_count -= call->signature->sentinelpos;
2004         tmpSig->sentinelpos  = 0;
2005         if (tmpSig->param_count > 0)
2006                 memcpy (tmpSig->params,
2007                         call->signature->params + call->signature->sentinelpos,
2008                         tmpSig->param_count * sizeof(MonoType *));
2009
2010         MONO_INST_NEW (cfg, sigArg, OP_ICONST);
2011         sigArg->inst_p0 = tmpSig;
2012
2013         MONO_INST_NEW_CALL_ARG (cfg, arg, OP_OUTARG_MEMBASE);
2014         arg->ins.inst_left   = sigArg;
2015         arg->ins.inst_right  = (MonoInst *) call;
2016         arg->size            = argSize;
2017         arg->offset          = cinfo->sigCookie.offset;
2018         MONO_INST_LIST_ADD_TAIL (&arg->ins.node, &call->out_args);
2019 }
2020
2021 /*========================= End of Function ========================*/
2022
2023 /*------------------------------------------------------------------*/
2024 /*                                                                  */
2025 /* Name         - mono_arch_instrument_mem_needs                    */
2026 /*                                                                  */
2027 /* Function     - Allow tracing to work with this interface (with   */
2028 /*                an optional argument).                            */
2029 /*                                                                  */
2030 /*------------------------------------------------------------------*/
2031
2032 void
2033 mono_arch_instrument_mem_needs (MonoMethod *method, int *stack, int *code)
2034 {
2035         /* no stack room needed now (may be needed for FASTCALL-trace support) */
2036         *stack = 0;
2037         /* split prolog-epilog requirements? */
2038         *code = 50; /* max bytes needed: check this number */
2039 }
2040
2041 /*========================= End of Function ========================*/
2042
2043 /*------------------------------------------------------------------*/
2044 /*                                                                  */
2045 /* Name         - mono_arch_instrument_prolog                       */
2046 /*                                                                  */
2047 /* Function     - Create an "instrumented" prolog.                  */
2048 /*                                                                  */
2049 /*------------------------------------------------------------------*/
2050
2051 void*
2052 mono_arch_instrument_prolog (MonoCompile *cfg, void *func, void *p,
2053                              gboolean enable_arguments)
2054 {
2055         guchar  *code = p;
2056         int     parmOffset,
2057                 fpOffset,
2058                 baseReg;
2059
2060         parmOffset = cfg->stack_usage - S390_TRACE_STACK_SIZE;
2061         if (cfg->method->save_lmf)
2062                 parmOffset -= sizeof(MonoLMF);
2063         fpOffset   = parmOffset + (5*sizeof(gint32));
2064         if (fpOffset > 4096) {
2065                 s390_lr (code, s390_r12, STK_BASE);
2066                 baseReg = s390_r12;
2067                 while (fpOffset > 4096) {
2068                         s390_ahi (code, baseReg, 4096);
2069                         fpOffset   -= 4096;
2070                         parmOffset -= 4096;
2071                 }
2072         } else {
2073                 baseReg = STK_BASE;
2074         }
2075
2076         s390_stm  (code, s390_r2, s390_r6, baseReg, parmOffset);
2077         s390_std  (code, s390_f0, 0, baseReg, fpOffset);
2078         s390_std  (code, s390_f1, 0, baseReg, fpOffset+sizeof(gdouble));
2079         s390_std  (code, s390_f2, 0, baseReg, fpOffset+2*sizeof(gdouble));
2080         s390_basr (code, s390_r13, 0);
2081         s390_j    (code, 6);
2082         s390_word (code, cfg->method);
2083         s390_word (code, func);
2084         s390_l    (code, s390_r2, 0, s390_r13, 4);
2085         s390_la   (code, s390_r3, 0, baseReg, parmOffset);
2086         s390_lr   (code, s390_r4, STK_BASE);
2087         s390_ahi  (code, s390_r4, cfg->stack_usage);
2088         s390_l    (code, s390_r1, 0, s390_r13, 8);
2089         s390_basr (code, s390_r14, s390_r1);
2090         s390_ld   (code, s390_f2, 0, baseReg, fpOffset+2*sizeof(gdouble));
2091         s390_ld   (code, s390_f1, 0, baseReg, fpOffset+sizeof(gdouble));
2092         s390_ld   (code, s390_f0, 0, baseReg, fpOffset);
2093         s390_lm   (code, s390_r2, s390_r6, baseReg, parmOffset);
2094
2095         return code;
2096 }
2097
2098 /*========================= End of Function ========================*/
2099
2100 /*------------------------------------------------------------------*/
2101 /*                                                                  */
2102 /* Name         - mono_arch_instrument_epilog                       */
2103 /*                                                                  */
2104 /* Function     - Create an epilog that will handle the returned    */
2105 /*                values used in instrumentation.                   */
2106 /*                                                                  */
2107 /*------------------------------------------------------------------*/
2108
2109 void*
2110 mono_arch_instrument_epilog (MonoCompile *cfg, void *func, void *p, gboolean enable_arguments)
2111 {
2112         guchar     *code = p;
2113         int        save_mode = SAVE_NONE,
2114                    saveOffset;
2115         MonoMethod *method = cfg->method;
2116         int        rtype = mono_type_get_underlying_type (mono_method_signature (method)->ret)->type;
2117
2118         saveOffset = cfg->stack_usage - S390_TRACE_STACK_SIZE;
2119         if (method->save_lmf)
2120                 saveOffset -= sizeof(MonoLMF);
2121
2122 handle_enum:
2123         switch (rtype) {
2124         case MONO_TYPE_VOID:
2125                 /* special case string .ctor icall */
2126                 if (strcmp (".ctor", method->name) && method->klass == mono_defaults.string_class)
2127                         save_mode = SAVE_ONE;
2128                 else
2129                         save_mode = SAVE_NONE;
2130                 break;
2131         case MONO_TYPE_I8:
2132         case MONO_TYPE_U8:
2133                 save_mode = SAVE_TWO;
2134                 break;
2135         case MONO_TYPE_R4:
2136                 save_mode = SAVE_R4;
2137                 break;
2138         case MONO_TYPE_R8:
2139                 save_mode = SAVE_R8;
2140                 break;
2141         case MONO_TYPE_VALUETYPE:
2142                 if (mono_method_signature (method)->ret->data.klass->enumtype) {
2143                         rtype = mono_method_signature (method)->ret->data.klass->enum_basetype->type;
2144                         goto handle_enum;
2145                 }
2146                 save_mode = SAVE_STRUCT;
2147                 break;
2148         default:
2149                 save_mode = SAVE_ONE;
2150                 break;
2151         }
2152
2153         switch (save_mode) {
2154         case SAVE_TWO:
2155                 s390_stm (code, s390_r2, s390_r3, cfg->frame_reg, saveOffset);
2156                 if (enable_arguments) {
2157                         s390_lr (code, s390_r4, s390_r3);
2158                         s390_lr (code, s390_r3, s390_r2);
2159                 }
2160                 break;
2161         case SAVE_ONE:
2162                 s390_st (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2163                 if (enable_arguments) {
2164                         s390_lr (code, s390_r3, s390_r2);
2165                 }
2166                 break;
2167         case SAVE_R4:
2168                 s390_std (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2169                 if (enable_arguments) {
2170                         s390_ldebr (code, s390_f0, s390_f0);
2171                 }
2172                 break;
2173         case SAVE_R8:
2174                 s390_std (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2175                 break;
2176         case SAVE_STRUCT:
2177                 s390_st (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2178                 if (enable_arguments) {
2179                         s390_l (code, s390_r3, 0, cfg->frame_reg,
2180                                 S390_MINIMAL_STACK_SIZE+cfg->param_area);
2181                 }
2182                 break;
2183         case SAVE_NONE:
2184         default:
2185                 break;
2186         }
2187
2188         s390_basr (code, s390_r13, 0);
2189         s390_j    (code, 6);
2190         s390_word (code, cfg->method);
2191         s390_word (code, func);
2192         s390_l    (code, s390_r2, 0, s390_r13, 4);
2193         s390_l    (code, s390_r1, 0, s390_r13, 8);
2194         s390_basr (code, s390_r14, s390_r1);
2195
2196         switch (save_mode) {
2197         case SAVE_TWO:
2198                 s390_lm  (code, s390_r2, s390_r3, cfg->frame_reg, saveOffset);
2199                 break;
2200         case SAVE_ONE:
2201                 s390_l   (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2202                 break;
2203         case SAVE_R4:
2204         case SAVE_R8:
2205                 s390_ld  (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2206                 break;
2207         case SAVE_STRUCT:
2208                 s390_l   (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2209                 break;
2210         case SAVE_NONE:
2211         default:
2212                 break;
2213         }
2214
2215         return code;
2216 }
2217
2218 /*========================= End of Function ========================*/
2219
2220 void
2221 mono_arch_peephole_pass_1 (MonoCompile *cfg, MonoBasicBlock *bb)
2222 {
2223 }
2224
2225 /*------------------------------------------------------------------*/
2226 /*                                                                  */
2227 /* Name         - mono_arch_peephole_pass                                     */
2228 /*                                                                  */
2229 /* Function     - Form a peephole pass at the code looking for      */
2230 /*                simple optimizations.                             */
2231 /*                                                                  */
2232 /*------------------------------------------------------------------*/
2233
2234 void
2235 mono_arch_peephole_pass_2 (MonoCompile *cfg, MonoBasicBlock *bb)
2236 {
2237         MonoInst *ins, *n;
2238
2239         MONO_BB_FOR_EACH_INS_SAFE (bb, n, ins) {
2240                 MonoInst *last_ins = mono_inst_list_prev (&ins->node, &bb->ins_list);
2241                 switch (ins->opcode) {
2242                 case OP_MUL_IMM:
2243                         /* remove unnecessary multiplication with 1 */
2244                         if (ins->inst_imm == 1) {
2245                                 if (ins->dreg != ins->sreg1) {
2246                                         ins->opcode = OP_MOVE;
2247                                 } else {
2248                                         MONO_DELETE_INS (bb, ins);
2249                                         continue;
2250                                 }
2251                         }
2252                         break;
2253                 case OP_LOAD_MEMBASE:
2254                 case OP_LOADI4_MEMBASE:
2255                         /*
2256                          * OP_STORE_MEMBASE_REG reg, offset(basereg)
2257                          * OP_LOAD_MEMBASE offset(basereg), reg
2258                          */
2259                         if (last_ins && (last_ins->opcode == OP_STOREI4_MEMBASE_REG
2260                                          || last_ins->opcode == OP_STORE_MEMBASE_REG) &&
2261                             ins->inst_basereg == last_ins->inst_destbasereg &&
2262                             ins->inst_offset == last_ins->inst_offset) {
2263                                 if (ins->dreg == last_ins->sreg1) {
2264                                         MONO_DELETE_INS (bb, ins);
2265                                         continue;
2266                                 } else {
2267                                         ins->opcode = OP_MOVE;
2268                                         ins->sreg1 = last_ins->sreg1;
2269                                 }
2270
2271                         /*
2272                          * Note: reg1 must be different from the basereg in the second load
2273                          * OP_LOAD_MEMBASE offset(basereg), reg1
2274                          * OP_LOAD_MEMBASE offset(basereg), reg2
2275                          * -->
2276                          * OP_LOAD_MEMBASE offset(basereg), reg1
2277                          * OP_MOVE reg1, reg2
2278                          */
2279                         } if (last_ins && (last_ins->opcode == OP_LOADI4_MEMBASE
2280                                            || last_ins->opcode == OP_LOAD_MEMBASE) &&
2281                               ins->inst_basereg != last_ins->dreg &&
2282                               ins->inst_basereg == last_ins->inst_basereg &&
2283                               ins->inst_offset == last_ins->inst_offset) {
2284
2285                                 if (ins->dreg == last_ins->dreg) {
2286                                         MONO_DELETE_INS (bb, ins);
2287                                         continue;
2288                                 } else {
2289                                         ins->opcode = OP_MOVE;
2290                                         ins->sreg1 = last_ins->dreg;
2291                                 }
2292
2293                                 //g_assert_not_reached ();
2294
2295 #if 0
2296                         /*
2297                          * OP_STORE_MEMBASE_IMM imm, offset(basereg)
2298                          * OP_LOAD_MEMBASE offset(basereg), reg
2299                          * -->
2300                          * OP_STORE_MEMBASE_IMM imm, offset(basereg)
2301                          * OP_ICONST reg, imm
2302                          */
2303                         } else if (last_ins && (last_ins->opcode == OP_STOREI4_MEMBASE_IMM
2304                                                 || last_ins->opcode == OP_STORE_MEMBASE_IMM) &&
2305                                    ins->inst_basereg == last_ins->inst_destbasereg &&
2306                                    ins->inst_offset == last_ins->inst_offset) {
2307                                 //static int c = 0; printf ("MATCHX %s %d\n", cfg->method->name,c++);
2308                                 ins->opcode = OP_ICONST;
2309                                 ins->inst_c0 = last_ins->inst_imm;
2310                                 g_assert_not_reached (); // check this rule
2311 #endif
2312                         }
2313                         break;
2314                 case OP_LOADU1_MEMBASE:
2315                 case OP_LOADI1_MEMBASE:
2316                         if (last_ins && (last_ins->opcode == OP_STOREI1_MEMBASE_REG) &&
2317                                         ins->inst_basereg == last_ins->inst_destbasereg &&
2318                                         ins->inst_offset == last_ins->inst_offset) {
2319                                 ins->opcode = (ins->opcode == OP_LOADI1_MEMBASE) ? OP_ICONV_TO_I1 : OP_ICONV_TO_U1;
2320                                 ins->sreg1 = last_ins->sreg1;
2321                         }
2322                         break;
2323                 case OP_LOADU2_MEMBASE:
2324                 case OP_LOADI2_MEMBASE:
2325                         if (last_ins && (last_ins->opcode == OP_STOREI2_MEMBASE_REG) &&
2326                                         ins->inst_basereg == last_ins->inst_destbasereg &&
2327                                         ins->inst_offset == last_ins->inst_offset) {
2328                                 ins->opcode = (ins->opcode == OP_LOADI2_MEMBASE) ? OP_ICONV_TO_I2 : OP_ICONV_TO_U2;
2329                                 ins->sreg1 = last_ins->sreg1;
2330                         }
2331                         break;
2332                 case OP_MOVE:
2333                         /*
2334                          * OP_MOVE reg, reg
2335                          */
2336                         if (ins->dreg == ins->sreg1) {
2337                                 MONO_DELETE_INS (bb, ins);
2338                                 continue;
2339                         }
2340                         /*
2341                          * OP_MOVE sreg, dreg
2342                          * OP_MOVE dreg, sreg
2343                          */
2344                         if (last_ins && last_ins->opcode == OP_MOVE &&
2345                             ins->sreg1 == last_ins->dreg &&
2346                             ins->dreg == last_ins->sreg1) {
2347                                 MONO_DELETE_INS (bb, ins);
2348                                 continue;
2349                         }
2350                         break;
2351                 }
2352         }
2353 }
2354
2355 /*========================= End of Function ========================*/
2356
2357 void
2358 mono_arch_lowering_pass (MonoCompile *cfg, MonoBasicBlock *bb)
2359 {
2360 }
2361
2362 /*========================= End of Function ========================*/
2363
2364 /*------------------------------------------------------------------*/
2365 /*                                                                  */
2366 /* Name         - emit_float_to_int                                 */
2367 /*                                                                  */
2368 /* Function     - Create instructions which will convert a floating */
2369 /*                point value to integer.                           */
2370 /*                                                                  */
2371 /*------------------------------------------------------------------*/
2372
2373 static guchar*
2374 emit_float_to_int (MonoCompile *cfg, guchar *code, int dreg, int sreg, int size, gboolean is_signed)
2375 {
2376         /* sreg is a float, dreg is an integer reg. */
2377         if (is_signed) {
2378                 s390_cfdbr (code, dreg, 5, sreg);
2379                 switch (size) {
2380                         case 1:
2381                                 s390_lhi  (code, s390_r0, 0);
2382                                 s390_lhi  (code, s390_r13, 0xff);
2383                                 s390_ltr  (code, dreg, dreg);
2384                                 s390_jnl  (code, 4);
2385                                 s390_lhi  (code, s390_r0, 0x80);
2386                                 s390_nr   (code, dreg, s390_r13);
2387                                 s390_or   (code, dreg, s390_r0);
2388                                 break;
2389                 }
2390         } else {
2391                 short *o[1];
2392                 s390_basr   (code, s390_r13, 0);
2393                 s390_j      (code, 10);
2394                 s390_llong  (code, 0x41e0000000000000);
2395                 s390_llong  (code, 0x41f0000000000000);
2396                 s390_ldr    (code, s390_f15, sreg);
2397                 s390_cdb    (code, s390_f15, 0, s390_r13, 4);
2398                 s390_jl     (code, 0); CODEPTR(code, o[0]);
2399                 s390_sdb    (code, s390_f15, 0, s390_r13, 12);
2400                 s390_cfdbr  (code, dreg, 7, s390_f15);
2401                 s390_j      (code, 4);
2402                 PTRSLOT(code, o[0]);
2403                 s390_cfdbr  (code, dreg, 5, sreg);
2404                 switch (size) {
2405                         case 1:
2406                                 s390_lhi  (code, s390_r0, 0xff);
2407                                 s390_nr   (code, dreg, s390_r0);
2408                                 break;
2409                         case 2:
2410                                 s390_lhi  (code, s390_r0, -1);
2411                                 s390_srl  (code, s390_r0, 0, 16);
2412                                 s390_nr   (code, dreg, s390_r0);
2413                                 break;
2414                 }
2415         }
2416         return code;
2417 }
2418
2419 /*========================= End of Function ========================*/
2420
2421 /*------------------------------------------------------------------*/
2422 /*                                                                  */
2423 /* Name         - mono_arch_output_basic_block                      */
2424 /*                                                                  */
2425 /* Function     - Perform the "real" work of emitting instructions  */
2426 /*                that will do the work of in the basic block.      */
2427 /*                                                                  */
2428 /*------------------------------------------------------------------*/
2429
2430 void
2431 mono_arch_output_basic_block (MonoCompile *cfg, MonoBasicBlock *bb)
2432 {
2433         MonoInst *ins, *next;
2434         MonoCallInst *call;
2435         guint offset;
2436         guint8 *code = cfg->native_code + cfg->code_len;
2437         guint last_offset = 0;
2438         int max_len, cpos, src2;
2439
2440         /* we don't align basic blocks of loops on s390 */
2441
2442         if (cfg->verbose_level > 2)
2443                 g_print ("Basic block %d starting at offset 0x%x\n", bb->block_num, bb->native_offset);
2444
2445         cpos = bb->max_offset;
2446
2447         if (cfg->prof_options & MONO_PROFILE_COVERAGE) {
2448                 //MonoCoverageInfo *cov = mono_get_coverage_info (cfg->method);
2449                 //g_assert (!mono_compile_aot);
2450                 //cpos += 6;
2451                 //if (bb->cil_code)
2452                 //      cov->data [bb->dfn].iloffset = bb->cil_code - cfg->cil_code;
2453                 /* this is not thread save, but good enough */
2454                 /* fixme: howto handle overflows? */
2455                 //x86_inc_mem (code, &cov->data [bb->dfn].count);
2456         }
2457
2458         MONO_BB_FOR_EACH_INS (bb, ins) {
2459                 offset = code - cfg->native_code;
2460
2461                 max_len = ((guint8 *)ins_get_spec (ins->opcode))[MONO_INST_LEN];
2462
2463                 if (offset > (cfg->code_size - max_len - 16)) {
2464                         cfg->code_size *= 2;
2465                         cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
2466                         code = cfg->native_code + offset;
2467                 }
2468
2469                 mono_debug_record_line_number (cfg, ins, offset);
2470
2471                 switch (ins->opcode) {
2472                 case OP_STOREI1_MEMBASE_IMM: {
2473                         s390_lhi (code, s390_r0, ins->inst_imm);
2474                         if (s390_is_uimm12(ins->inst_offset))
2475                                 s390_stc (code, s390_r0, 0, ins->inst_destbasereg, ins->inst_offset);
2476                         else {
2477                                 s390_basr (code, s390_r13, 0);
2478                                 s390_j    (code, 4);
2479                                 s390_word (code, ins->inst_offset);
2480                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2481                                 s390_stc  (code, s390_r0, s390_r13, ins->inst_destbasereg, 0);
2482                         }
2483                 }
2484                         break;
2485                 case OP_STOREI2_MEMBASE_IMM: {
2486                         s390_lhi (code, s390_r0, ins->inst_imm);
2487                         if (s390_is_uimm12(ins->inst_offset)) {
2488                                 s390_sth (code, s390_r0, 0, ins->inst_destbasereg, ins->inst_offset);
2489                         } else {
2490                                 s390_basr (code, s390_r13, 0);
2491                                 s390_j    (code, 4);
2492                                 s390_word (code, ins->inst_offset);
2493                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2494                                 s390_sth  (code, s390_r0, s390_r13, ins->inst_destbasereg, 0);
2495                         }
2496                 }
2497                         break;
2498                 case OP_STORE_MEMBASE_IMM:
2499                 case OP_STOREI4_MEMBASE_IMM: {
2500                         if (s390_is_imm16(ins->inst_imm)) {
2501                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2502                         } else {
2503                                 s390_basr (code, s390_r13, 0);
2504                                 s390_j    (code, 4);
2505                                 s390_word (code, ins->inst_imm);
2506                                 s390_l    (code, s390_r0, 0, s390_r13, 4);
2507                         }
2508                         if (s390_is_uimm12(ins->inst_offset)) {
2509                                 s390_st  (code, s390_r0, 0, ins->inst_destbasereg, ins->inst_offset);
2510                         } else {
2511                                 s390_basr (code, s390_r13, 0);
2512                                 s390_j    (code, 4);
2513                                 s390_word (code, ins->inst_offset);
2514                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2515                                 s390_st   (code, s390_r0, s390_r13, ins->inst_destbasereg, 0);
2516                         }
2517                 }
2518                         break;
2519                 case OP_STOREI1_MEMBASE_REG: {
2520                         if (s390_is_uimm12(ins->inst_offset)) {
2521                                 s390_stc  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
2522                         } else {
2523                                 s390_basr (code, s390_r13, 0);
2524                                 s390_j    (code, 4);
2525                                 s390_word (code, ins->inst_offset);
2526                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2527                                 s390_stc  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
2528                         }
2529                 }
2530                         break;
2531                 case OP_STOREI2_MEMBASE_REG: {
2532                         if (s390_is_uimm12(ins->inst_offset)) {
2533                                 s390_sth  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
2534                         } else {
2535                                 s390_basr (code, s390_r13, 0);
2536                                 s390_j    (code, 4);
2537                                 s390_word (code, ins->inst_offset);
2538                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2539                                 s390_sth  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
2540                         }
2541                 }
2542                         break;
2543                 case OP_STORE_MEMBASE_REG:
2544                 case OP_STOREI4_MEMBASE_REG: {
2545                         if (s390_is_uimm12(ins->inst_offset)) {
2546                                 s390_st   (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
2547                         } else {
2548                                 s390_basr (code, s390_r13, 0);
2549                                 s390_j    (code, 4);
2550                                 s390_word (code, ins->inst_offset);
2551                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2552                                 s390_st   (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
2553                         }
2554                 }
2555                         break;
2556                 case OP_LOADU4_MEM:
2557                         g_assert_not_reached ();
2558                         break;
2559                 case OP_LOAD_MEMBASE:
2560                 case OP_LOADI4_MEMBASE:
2561                 case OP_LOADU4_MEMBASE: {
2562                         if (s390_is_uimm12(ins->inst_offset))
2563                                 s390_l    (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
2564                         else {
2565                                 if (s390_is_imm16(ins->inst_offset)) {
2566                                         s390_lhi (code, s390_r13, ins->inst_offset);
2567                                         s390_l   (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
2568                                 } else {
2569                                         s390_basr (code, s390_r13, 0);
2570                                         s390_j    (code, 4);
2571                                         s390_word (code, ins->inst_offset);
2572                                         s390_l    (code, s390_r13, 0, s390_r13, 4);
2573                                         s390_l    (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
2574                                 }
2575                         }
2576                 }
2577                         break;
2578                 case OP_LOADU1_MEMBASE: {
2579                         s390_lhi (code, s390_r0, 0);
2580                         if (s390_is_uimm12(ins->inst_offset))
2581                                 s390_ic   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
2582                         else {
2583                                 s390_basr (code, s390_r13, 0);
2584                                 s390_j    (code, 4);
2585                                 s390_word (code, ins->inst_offset);
2586                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2587                                 s390_ic   (code, s390_r0, s390_r13, ins->inst_basereg, 0);
2588                         }
2589                         s390_lr   (code, ins->dreg, s390_r0);
2590                 }
2591                         break;
2592                 case OP_LOADI1_MEMBASE: {
2593                         s390_lhi (code, s390_r0, 0);
2594                         if (s390_is_uimm12(ins->inst_offset))
2595                                 s390_ic   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
2596                         else {
2597                                 s390_basr (code, s390_r13, 0);
2598                                 s390_j    (code, 4);
2599                                 s390_word (code, ins->inst_offset);
2600                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2601                                 s390_ic   (code, s390_r0, s390_r13, ins->inst_basereg, 0);
2602                         }
2603                         s390_lhi  (code, s390_r13, 0x80);
2604                         s390_nr   (code, s390_r13, s390_r0);
2605                         s390_jz   (code, 5);
2606                         s390_lhi  (code, s390_r13, 0xff00);
2607                         s390_or   (code, s390_r0, s390_r13);
2608                         s390_lr   (code, ins->dreg, s390_r0);
2609                 }
2610                         break;
2611                 case OP_LOADU2_MEMBASE: {
2612                         s390_lhi (code, s390_r0, 0);
2613                         if (s390_is_uimm12(ins->inst_offset))
2614                                 s390_icm  (code, s390_r0, 3, ins->inst_basereg, ins->inst_offset);
2615                         else {
2616                                 s390_basr (code, s390_r13, 0);
2617                                 s390_j    (code, 4);
2618                                 s390_word (code, ins->inst_offset);
2619                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2620                                 s390_ar   (code, s390_r13, ins->inst_basereg);
2621                                 s390_icm  (code, s390_r0, 3, s390_r13, 0);
2622                         }
2623                         s390_lr  (code, ins->dreg, s390_r0);
2624                 }
2625                         break;
2626                 case OP_LOADI2_MEMBASE: {
2627                         s390_lhi (code, s390_r0, 0);
2628                         if (s390_is_uimm12(ins->inst_offset))
2629                                 s390_lh   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
2630                         else {
2631                                 s390_basr (code, s390_r13, 0);
2632                                 s390_j    (code, 4);
2633                                 s390_word (code, ins->inst_offset);
2634                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2635                                 s390_lh   (code, s390_r0, s390_r13, ins->inst_basereg, 0);
2636                         }
2637                         s390_lr  (code, ins->dreg, s390_r0);
2638                 }
2639                         break;
2640                 case OP_ICONV_TO_I1: {
2641                         s390_lhi  (code, s390_r0, 0x80);
2642                         if (ins->dreg != ins->sreg1) {
2643                                 s390_lr   (code, ins->dreg, ins->sreg1);
2644                         }
2645                         s390_nr   (code, s390_r0, ins->sreg1);
2646                         s390_jz   (code, 7);
2647                         s390_lhi  (code, s390_r13, -1);
2648                         s390_sll  (code, s390_r13, 0, 8);
2649                         s390_or   (code, ins->dreg, s390_r13);
2650                 }
2651                         break;
2652                 case OP_ICONV_TO_I2: {
2653                         s390_lhi  (code, s390_r0, 0x80);
2654                         s390_sll  (code, s390_r0, 0, 8);
2655                         if (ins->dreg != ins->sreg1) {
2656                                 s390_lr   (code, ins->dreg, ins->sreg1);
2657                         }
2658                         s390_nr   (code, s390_r0, ins->sreg1);
2659                         s390_jz   (code, 7);
2660                         s390_lhi  (code, s390_r13, -1);
2661                         s390_sll  (code, s390_r13, 0, 16);
2662                         s390_or   (code, ins->dreg, s390_r13);
2663                 }
2664                         break;
2665                 case OP_ICONV_TO_U1: {
2666                         s390_lhi  (code, s390_r0, 0xff);
2667                         if (ins->dreg != ins->sreg1) {
2668                                 s390_lr   (code, ins->dreg, ins->sreg1);
2669                         }
2670                         s390_nr   (code, ins->dreg, s390_r0);
2671                 }
2672                         break;
2673                 case OP_ICONV_TO_U2: {
2674                         s390_lhi  (code, s390_r0, -1);
2675                         s390_sll  (code, s390_r0, 0, 16);
2676                         s390_srl  (code, s390_r0, 0, 16);
2677                         if (ins->dreg != ins->sreg1) {
2678                                 s390_lr   (code, ins->dreg, ins->sreg1);
2679                         }
2680                         s390_nr   (code, ins->dreg, s390_r0);
2681                 }
2682                         break;
2683                 case OP_COMPARE: {
2684                         next = mono_inst_list_next (&ins->node, &bb->ins_list);
2685                         if ((next) &&
2686                             (((next->opcode >= OP_IBNE_UN) &&
2687                               (next->opcode <= OP_IBLT_UN)) ||
2688                              ((next->opcode >= OP_COND_EXC_NE_UN) &&
2689                               (next->opcode <= OP_COND_EXC_LT_UN)) ||
2690                              ((next->opcode == OP_CLT_UN) ||
2691                               (next->opcode == OP_CGT_UN))))
2692                                 s390_clr  (code, ins->sreg1, ins->sreg2);
2693                         else
2694                                 s390_cr   (code, ins->sreg1, ins->sreg2);
2695                 }
2696                         break;
2697                 case OP_COMPARE_IMM: {
2698                         next = mono_inst_list_next (&ins->node, &bb->ins_list);
2699                         if (s390_is_imm16 (ins->inst_imm)) {
2700                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2701                                 if ((next) &&
2702                                     (((next->opcode >= OP_IBNE_UN) &&
2703                                       (next->opcode <= OP_IBLT_UN)) ||
2704                                      ((next->opcode >= OP_COND_EXC_NE_UN) &&
2705                                       (next->opcode <= OP_COND_EXC_LT_UN)) ||
2706                                      ((next->opcode == OP_CLT_UN) ||
2707                                       (next->opcode == OP_CGT_UN))))
2708                                         s390_clr  (code, ins->sreg1, s390_r0);
2709                                 else
2710                                         s390_cr   (code, ins->sreg1, s390_r0);
2711                         }
2712                         else {
2713                                 s390_basr (code, s390_r13, 0);
2714                                 s390_j    (code, 4);
2715                                 s390_word (code, ins->inst_imm);
2716                                 if ((next) &&
2717                                     (((next->opcode >= OP_IBNE_UN) &&
2718                                       (next->opcode <= OP_IBLT_UN)) ||
2719                                      ((next->opcode >= OP_COND_EXC_NE_UN) &&
2720                                       (next->opcode <= OP_COND_EXC_LT_UN)) ||
2721                                      ((next->opcode == OP_CLT_UN) ||
2722                                       (next->opcode == OP_CGT_UN))))
2723                                         s390_cl   (code, ins->sreg1, 0, s390_r13, 4);
2724                                 else
2725                                         s390_c    (code, ins->sreg1, 0, s390_r13, 4);
2726                         }
2727                 }
2728                         break;
2729                 case OP_BREAK: {
2730                         mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS, mono_break);
2731                         s390_brasl (code, s390_r14, 0);
2732                 }
2733                         break;
2734                 case OP_ADDCC: {
2735                         CHECK_SRCDST_COM;
2736                         s390_alr  (code, ins->dreg, src2);
2737                 }
2738                         break;
2739                 case OP_IADD: {
2740                         CHECK_SRCDST_COM;
2741                         s390_ar   (code, ins->dreg, src2);
2742                 }
2743                         break;
2744                 case OP_ADC: {
2745                         CHECK_SRCDST_COM;
2746                         s390_alcr (code, ins->dreg, src2);
2747                 }
2748                         break;
2749                 case OP_ADD_IMM: {
2750                         if (ins->dreg != ins->sreg1) {
2751                                 s390_lr   (code, ins->dreg, ins->sreg1);
2752                         }
2753                         next = mono_inst_list_next (&ins->node, &bb->ins_list);
2754                         if ((next) &&
2755                             (next->opcode == OP_ADC_IMM)) {
2756                                 s390_basr (code, s390_r13, 0);
2757                                 s390_j    (code, 4);
2758                                 s390_word (code, ins->inst_imm);
2759                                 s390_a (code, ins->dreg, 0, s390_r13, 4);
2760                         } else {
2761                                 if (s390_is_imm16 (ins->inst_imm)) {
2762                                         s390_ahi  (code, ins->dreg, ins->inst_imm);
2763                                 } else {
2764                                         s390_basr (code, s390_r13, 0);
2765                                         s390_j    (code, 4);
2766                                         s390_word (code, ins->inst_imm);
2767                                         s390_a (code, ins->dreg, 0, s390_r13, 4);
2768                                 }
2769                         }
2770                 }
2771                         break;
2772                 case OP_ADDCC_IMM: {
2773                         next = mono_inst_list_next (&ins->node, &bb->ins_list);
2774                         if ((next) &&
2775                             (next->opcode == OP_ADC_IMM)) {
2776                                 s390_basr (code, s390_r13, 0);
2777                                 s390_j    (code, 4);
2778                                 s390_word (code, ins->inst_imm);
2779                                 if (ins->dreg != ins->sreg1) {
2780                                         s390_lr   (code, ins->dreg, ins->sreg1);
2781                                 }
2782                                 s390_al   (code, ins->dreg, 0, s390_r13, 4);
2783                         } else {
2784                                 if (s390_is_imm16 (ins->inst_imm)) {
2785                                         if (ins->dreg != ins->sreg1) {
2786                                                 s390_lr   (code, ins->dreg, ins->sreg1);
2787                                         }
2788                                         s390_lhi  (code, s390_r0, ins->inst_imm);
2789                                         s390_alcr (code, ins->dreg, s390_r0);
2790                                 } else {
2791                                         s390_basr (code, s390_r13, 0);
2792                                         s390_j    (code, 4);
2793                                         s390_word (code, ins->inst_imm);
2794                                         if (ins->dreg != ins->sreg1) {
2795                                                 s390_lr   (code, ins->dreg, ins->sreg1);
2796                                         }
2797                                         s390_al   (code, ins->dreg, 0, s390_r13, 4);
2798                                 }
2799                         }
2800                 }
2801                         break;
2802                 case OP_ADC_IMM: {
2803                         if (s390_is_imm16 (ins->inst_imm)) {
2804                                 if (ins->dreg != ins->sreg1) {
2805                                         s390_lr   (code, ins->dreg, ins->sreg1);
2806                                 }
2807                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2808                                 s390_alcr (code, ins->dreg, s390_r0);
2809                         } else {
2810                                 s390_basr (code, s390_r13, 0);
2811                                 s390_j    (code, 4);
2812                                 s390_word (code, ins->inst_imm);
2813                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2814                                 s390_alcr (code, ins->dreg, s390_r13);
2815                         }
2816                 }
2817                         break;
2818                 case OP_IADD_OVF: {
2819                         CHECK_SRCDST_COM;
2820                         s390_ar   (code, ins->dreg, src2);
2821                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2822                 }
2823                         break;
2824                 case OP_IADD_OVF_UN: {
2825                         CHECK_SRCDST_COM;
2826                         s390_alr  (code, ins->dreg, src2);
2827                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
2828                 }
2829                         break;
2830                 case OP_LADD: {
2831                         s390_alr  (code, s390_r0, ins->sreg1);
2832                         s390_jnc  (code, 4);
2833                         s390_ahi  (code, s390_r1, 1);
2834                         s390_ar   (code, s390_r1, ins->sreg2);
2835                         s390_lr   (code, ins->dreg, s390_r0);
2836                         s390_lr   (code, ins->dreg+1, s390_r1);
2837                 }
2838                         break;
2839                 case OP_LADD_OVF: {
2840                         short int *o[1];
2841                         s390_alr  (code, s390_r0, ins->sreg1);
2842                         s390_jnc  (code, 0); CODEPTR(code, o[0]);
2843                         s390_ahi  (code, s390_r1, 1);
2844                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2845                         PTRSLOT   (code, o[0]);
2846                         s390_ar   (code, s390_r1, ins->sreg2);
2847                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2848                         s390_lr   (code, ins->dreg, s390_r0);
2849                         s390_lr   (code, ins->dreg+1, s390_r1);
2850                 }
2851                         break;
2852                 case OP_LADD_OVF_UN: {
2853                         s390_alr  (code, s390_r0, ins->sreg1);
2854                         s390_alcr (code, s390_r1, ins->sreg2);
2855                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
2856                         s390_lr   (code, ins->dreg, s390_r0);
2857                         s390_lr   (code, ins->dreg+1, s390_r1);
2858                 }
2859                         break;
2860                 case OP_ADD_OVF_CARRY: {
2861                         CHECK_SRCDST_COM;
2862                         s390_lhi  (code, s390_r0, 0);
2863                         s390_lr   (code, s390_r1, s390_r0);
2864                         s390_alcr (code, s390_r0, s390_r1);
2865                         s390_ar   (code, ins->dreg, src2);
2866                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2867                         s390_ar   (code, ins->dreg, s390_r0);
2868                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2869                 }
2870                         break;
2871                 case OP_ADD_OVF_UN_CARRY: {
2872                         CHECK_SRCDST_COM;
2873                         s390_alcr (code, ins->dreg, src2);
2874                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
2875                 }
2876                         break;
2877                 case OP_SUBCC: {
2878                         CHECK_SRCDST_NCOM;
2879                         s390_slr (code, ins->dreg, src2);
2880                 }
2881                         break;
2882                 case OP_ISUB: {
2883                         CHECK_SRCDST_NCOM;
2884                         s390_sr   (code, ins->dreg, src2);
2885                 }
2886                         break;
2887                 case OP_SBB: {
2888                         CHECK_SRCDST_NCOM;
2889                         s390_slbr (code, ins->dreg, src2);
2890                 }
2891                         break;
2892                 case OP_SUBCC_IMM: {
2893                         if (s390_is_imm16 (-ins->inst_imm)) {
2894                                 if (ins->dreg != ins->sreg1) {
2895                                         s390_lr   (code, ins->dreg, ins->sreg1);
2896                                 }
2897                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2898                                 s390_slr  (code, ins->dreg, s390_r0);
2899                         } else {
2900                                 s390_basr (code, s390_r13, 0);
2901                                 s390_j    (code, 4);
2902                                 s390_word (code, ins->inst_imm);
2903                                 if (ins->dreg != ins->sreg1) {
2904                                         s390_lr   (code, ins->dreg, ins->sreg1);
2905                                 }
2906                                 s390_sl   (code, ins->dreg, 0, s390_r13, 4);
2907                         }
2908                 }
2909                         break;
2910                 case OP_SUB_IMM: {
2911                         if (s390_is_imm16 (-ins->inst_imm)) {
2912                                 if (ins->dreg != ins->sreg1) {
2913                                         s390_lr   (code, ins->dreg, ins->sreg1);
2914                                 }
2915                                 s390_ahi  (code, ins->dreg, -ins->inst_imm);
2916                         } else {
2917                                 s390_basr (code, s390_r13, 0);
2918                                 s390_j    (code, 4);
2919                                 s390_word (code, ins->inst_imm);
2920                                 if (ins->dreg != ins->sreg1) {
2921                                         s390_lr   (code, ins->dreg, ins->sreg1);
2922                                 }
2923                                 s390_s    (code, ins->dreg, 0, s390_r13, 4);
2924                         }
2925                 }
2926                         break;
2927                 case OP_SBB_IMM: {
2928                         if (ins->dreg != ins->sreg1) {
2929                                 s390_lr    (code, ins->dreg, ins->sreg1);
2930                         }
2931                         if (s390_is_imm16 (-ins->inst_imm)) {
2932                                 s390_lhi   (code, s390_r0, ins->inst_imm);
2933                                 s390_slbr  (code, ins->dreg, s390_r0);
2934                         } else {
2935                                 s390_basr (code, s390_r13, 0);
2936                                 s390_j    (code, 4);
2937                                 s390_word (code, ins->inst_imm);
2938                                 s390_slb  (code, ins->dreg, 0, s390_r13, 4);
2939                         }
2940                 }
2941                         break;
2942                 case OP_ISUB_OVF: {
2943                         CHECK_SRCDST_NCOM;
2944                         s390_sr   (code, ins->dreg, src2);
2945                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2946                 }
2947                         break;
2948                 case OP_ISUB_OVF_UN: {
2949                         CHECK_SRCDST_NCOM;
2950                         s390_slr  (code, ins->dreg, src2);
2951                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
2952                 }
2953                         break;
2954                 case OP_LSUB: {
2955                         s390_lr   (code, s390_r14, ins->sreg2);
2956                         s390_slr  (code, s390_r0, ins->sreg1);
2957                         s390_jnl  (code, 4);
2958                         s390_ahi  (code, s390_r14, 1);
2959                         s390_sr   (code, s390_r1, s390_r14);
2960                         s390_lr   (code, ins->dreg, s390_r0);
2961                         s390_lr   (code, ins->dreg+1, s390_r1);
2962                 }
2963                         break;
2964                 case OP_LSUB_OVF: {
2965                         short int *o[1];
2966                         s390_lr   (code, s390_r14, ins->sreg2);
2967                         s390_slr  (code, s390_r0, ins->sreg1);
2968                         s390_jnl  (code, 0); CODEPTR(code, o[0]);
2969                         s390_ahi  (code, s390_r14, 1);
2970                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2971                         PTRSLOT   (code, o[0]);
2972                         s390_sr   (code, s390_r1, s390_r14);
2973                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2974                         s390_lr   (code, ins->dreg, s390_r0);
2975                         s390_lr   (code, ins->dreg+1, s390_r1);
2976                 }
2977                         break;
2978                 case OP_LSUB_OVF_UN: {
2979                         s390_slr  (code, s390_r0, ins->sreg1);
2980                         s390_slbr (code, s390_r1, ins->sreg2);
2981                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, "OverflowException");
2982                         s390_lr   (code, ins->dreg, s390_r0);
2983                         s390_lr   (code, ins->dreg+1, s390_r1);
2984                 }
2985                         break;
2986                 case OP_SUB_OVF_CARRY: {
2987                         CHECK_SRCDST_NCOM;
2988                         s390_lhi  (code, s390_r0, 0);
2989                         s390_lr   (code, s390_r1, s390_r0);
2990                         s390_slbr (code, s390_r0, s390_r1);
2991                         s390_sr   (code, ins->dreg, src2);
2992                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2993                         s390_ar   (code, ins->dreg, s390_r0);
2994                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2995                 }
2996                         break;
2997                 case OP_SUB_OVF_UN_CARRY: {
2998                         CHECK_SRCDST_NCOM;
2999                         s390_slbr (code, ins->dreg, src2);
3000                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
3001                 }
3002                         break;
3003                 case OP_IAND: {
3004                         if (ins->sreg1 == ins->dreg) {
3005                                 s390_nr   (code, ins->dreg, ins->sreg2);
3006                         }
3007                         else {
3008                                 if (ins->sreg2 == ins->dreg) {
3009                                         s390_nr  (code, ins->dreg, ins->sreg1);
3010                                 }
3011                                 else {
3012                                         s390_lr  (code, ins->dreg, ins->sreg1);
3013                                         s390_nr  (code, ins->dreg, ins->sreg2);
3014                                 }
3015                         }
3016                 }
3017                         break;
3018                 case OP_AND_IMM: {
3019                         if (s390_is_imm16 (ins->inst_imm)) {
3020                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3021                                 if (ins->dreg != ins->sreg1) {
3022                                         s390_lr   (code, ins->dreg, ins->sreg1);
3023                                 }
3024                                 s390_nr   (code, ins->dreg, s390_r0);
3025                         } else {
3026                                 s390_basr (code, s390_r13, 0);
3027                                 s390_j    (code, 4);
3028                                 s390_word (code, ins->inst_imm);
3029                                 if (ins->dreg != ins->sreg1) {
3030                                         s390_lr   (code, ins->dreg, ins->sreg1);
3031                                 }
3032                                 s390_n    (code, ins->dreg, 0, s390_r13, 4);
3033                         }
3034                 }
3035                         break;
3036                 case OP_IDIV: {
3037                         s390_lr   (code, s390_r0, ins->sreg1);
3038                         s390_srda (code, s390_r0, 0, 32);
3039                         s390_dr   (code, s390_r0, ins->sreg2);
3040                         s390_lr   (code, ins->dreg, s390_r1);
3041                 }
3042                         break;
3043                 case OP_IDIV_UN: {
3044                         s390_lr   (code, s390_r0, ins->sreg1);
3045                         s390_srdl (code, s390_r0, 0, 32);
3046                         s390_dlr  (code, s390_r0, ins->sreg2);
3047                         s390_lr   (code, ins->dreg, s390_r1);
3048                 }
3049                         break;
3050                 case OP_DIV_IMM: {
3051                         if (s390_is_imm16 (ins->inst_imm)) {
3052                                 s390_lhi  (code, s390_r13, ins->inst_imm);
3053                                 s390_lr   (code, s390_r0, ins->sreg1);
3054                         } else {
3055                                 s390_basr (code, s390_r13, 0);
3056                                 s390_j    (code, 4);
3057                                 s390_word (code, ins->inst_imm);
3058                                 s390_lr   (code, s390_r0, ins->sreg1);
3059                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3060                         }
3061                         s390_srda (code, s390_r0, 0, 32);
3062                         s390_dr   (code, s390_r0, s390_r13);
3063                         s390_lr   (code, ins->dreg, s390_r1);
3064                 }
3065                         break;
3066                 case OP_IREM: {
3067                         s390_lr   (code, s390_r0, ins->sreg1);
3068                         s390_srda (code, s390_r0, 0, 32);
3069                         s390_dr   (code, s390_r0, ins->sreg2);
3070                         s390_lr   (code, ins->dreg, s390_r0);
3071                         break;
3072                 case OP_IREM_UN:
3073                         s390_lr   (code, s390_r0, ins->sreg1);
3074                         s390_srdl (code, s390_r0, 0, 32);
3075                         s390_dlr  (code, s390_r0, ins->sreg2);
3076                         s390_lr   (code, ins->dreg, s390_r0);
3077                 }
3078                         break;
3079                 case OP_REM_IMM: {
3080                         if (s390_is_imm16 (ins->inst_imm)) {
3081                                 s390_lhi  (code, s390_r13, ins->inst_imm);
3082                                 s390_lr   (code, s390_r0, ins->sreg1);
3083                         } else {
3084                                 s390_basr (code, s390_r13, 0);
3085                                 s390_j    (code, 4);
3086                                 s390_word (code, ins->inst_imm);
3087                                 s390_lr   (code, s390_r0, ins->sreg1);
3088                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3089                         }
3090                         s390_srda (code, s390_r0, 0, 32);
3091                         s390_dr   (code, s390_r0, s390_r13);
3092                         s390_lr   (code, ins->dreg, s390_r0);
3093                 }
3094                         break;
3095                 case OP_IOR: {
3096                         if (ins->sreg1 == ins->dreg) {
3097                                 s390_or   (code, ins->dreg, ins->sreg2);
3098                         }
3099                         else {
3100                                 if (ins->sreg2 == ins->dreg) {
3101                                         s390_or  (code, ins->dreg, ins->sreg1);
3102                                 }
3103                                 else {
3104                                         s390_lr  (code, ins->dreg, ins->sreg1);
3105                                         s390_or  (code, ins->dreg, ins->sreg2);
3106                                 }
3107                         }
3108                 }
3109                         break;
3110                 case OP_OR_IMM: {
3111                         if (s390_is_imm16 (ins->inst_imm)) {
3112                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3113                                 if (ins->dreg != ins->sreg1) {
3114                                         s390_lr   (code, ins->dreg, ins->sreg1);
3115                                 }
3116                                 s390_or   (code, ins->dreg, s390_r0);
3117                         } else {
3118                                 s390_basr (code, s390_r13, 0);
3119                                 s390_j    (code, 4);
3120                                 s390_word (code, ins->inst_imm);
3121                                 if (ins->dreg != ins->sreg1) {
3122                                         s390_lr   (code, ins->dreg, ins->sreg1);
3123                                 }
3124                                 s390_o    (code, ins->dreg, 0, s390_r13, 4);
3125                         }
3126                 }
3127                         break;
3128                 case OP_IXOR: {
3129                         if (ins->sreg1 == ins->dreg) {
3130                                 s390_xr   (code, ins->dreg, ins->sreg2);
3131                         }
3132                         else {
3133                                 if (ins->sreg2 == ins->dreg) {
3134                                         s390_xr  (code, ins->dreg, ins->sreg1);
3135                                 }
3136                                 else {
3137                                         s390_lr  (code, ins->dreg, ins->sreg1);
3138                                         s390_xr  (code, ins->dreg, ins->sreg2);
3139                                 }
3140                         }
3141                 }
3142                         break;
3143                 case OP_XOR_IMM: {
3144                         if (s390_is_imm16 (ins->inst_imm)) {
3145                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3146                                 if (ins->dreg != ins->sreg1) {
3147                                         s390_lr   (code, ins->dreg, ins->sreg1);
3148                                 }
3149                                 s390_xr   (code, ins->dreg, s390_r0);
3150                         } else {
3151                                 s390_basr (code, s390_r13, 0);
3152                                 s390_j    (code, 4);
3153                                 s390_word (code, ins->inst_imm);
3154                                 if (ins->dreg != ins->sreg1) {
3155                                         s390_lr   (code, ins->dreg, ins->sreg1);
3156                                 }
3157                                 s390_x    (code, ins->dreg, 0, s390_r13, 4);
3158                         }
3159                 }
3160                         break;
3161                 case OP_ISHL: {
3162                         CHECK_SRCDST_NCOM;
3163                         s390_sll  (code, ins->dreg, src2, 0);
3164                 }
3165                         break;
3166                 case OP_SHL_IMM: {
3167                         if (ins->sreg1 != ins->dreg) {
3168                                 s390_lr   (code, ins->dreg, ins->sreg1);
3169                         }
3170                         s390_sll  (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3171                 }
3172                         break;
3173                 case OP_ISHR: {
3174                         CHECK_SRCDST_NCOM;
3175                         s390_sra  (code, ins->dreg, src2, 0);
3176                 }
3177                         break;
3178                 case OP_SHR_IMM: {
3179                         if (ins->sreg1 != ins->dreg) {
3180                                 s390_lr   (code, ins->dreg, ins->sreg1);
3181                         }
3182                         s390_sra  (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3183                 }
3184                         break;
3185                 case OP_SHR_UN_IMM: {
3186                         if (ins->sreg1 != ins->dreg) {
3187                                 s390_lr   (code, ins->dreg, ins->sreg1);
3188                         }
3189                         s390_srl  (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3190                 }
3191                         break;
3192                 case OP_ISHR_UN: {
3193                         CHECK_SRCDST_NCOM;
3194                         s390_srl  (code, ins->dreg, src2, 0);
3195                 }
3196                         break;
3197                 case OP_INOT: {
3198                         if (ins->sreg1 != ins->dreg) {
3199                                 s390_lr   (code, ins->dreg, ins->sreg1);
3200                         }
3201                         s390_lhi (code, s390_r0, -1);
3202                         s390_xr  (code, ins->dreg, s390_r0);
3203                 }
3204                         break;
3205                 case OP_INEG: {
3206                         s390_lcr (code, ins->dreg, ins->sreg1);
3207                 }
3208                         break;
3209                 case OP_IMUL: {
3210                         if (ins->sreg1 == ins->dreg) {
3211                                 s390_msr  (code, ins->dreg, ins->sreg2);
3212                         }
3213                         else {
3214                                 if (ins->sreg2 == ins->dreg) {
3215                                         s390_msr (code, ins->dreg, ins->sreg1);
3216                                 }
3217                                 else {
3218                                         s390_lr  (code, ins->dreg, ins->sreg1);
3219                                         s390_msr (code, ins->dreg, ins->sreg2);
3220                                 }
3221                         }
3222                 }
3223                         break;
3224                 case OP_MUL_IMM: {
3225                         if (s390_is_imm16 (ins->inst_imm)) {
3226                                 s390_lhi  (code, s390_r13, ins->inst_imm);
3227                         } else {
3228                                 s390_basr (code, s390_r13, 0);
3229                                 s390_j    (code, 4);
3230                                 s390_word (code, ins->inst_imm);
3231 //                              if (ins->dreg != ins->sreg1) {
3232 //                                      s390_lr   (code, ins->dreg, ins->sreg1);
3233 //                              }
3234                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3235                         }
3236                         if (ins->dreg != ins->sreg1) {
3237                                 s390_lr   (code, ins->dreg, ins->sreg1);
3238                         }
3239                         s390_msr  (code, ins->dreg, s390_r13);
3240                 }
3241                         break;
3242                 case OP_IMUL_OVF: {
3243                         short int *o[2];
3244                         s390_ltr  (code, s390_r1, ins->sreg1);
3245                         s390_jz   (code, 0); CODEPTR(code, o[0]);
3246                         s390_ltr  (code, s390_r0, ins->sreg2);
3247                         s390_jnz  (code, 6);
3248                         s390_lhi  (code, s390_r1, 0);
3249                         s390_j    (code, 0); CODEPTR(code, o[1]);
3250                         s390_xr   (code, s390_r0, s390_r1);
3251                         s390_msr  (code, s390_r1, ins->sreg2);
3252                         s390_xr   (code, s390_r0, s390_r1);
3253                         s390_srl  (code, s390_r0, 0, 31);
3254                         s390_ltr  (code, s390_r0, s390_r0);
3255                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3256                         PTRSLOT   (code, o[0]);
3257                         PTRSLOT   (code, o[1]);
3258                         s390_lr   (code, ins->dreg, s390_r1);
3259                 }
3260                         break;
3261                 case OP_IMUL_OVF_UN: {
3262                         s390_lhi  (code, s390_r0, 0);
3263                         s390_lr   (code, s390_r1, ins->sreg1);
3264                         s390_mlr  (code, s390_r0, ins->sreg2);
3265                         s390_ltr  (code, s390_r0, s390_r0);
3266                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3267                         s390_lr   (code, ins->dreg, s390_r1);
3268                 }
3269                         break;
3270                 case OP_LMUL: {
3271                         s390_l    (code, s390_r0, 0, ins->sreg1, 4);
3272                         s390_srda (code, s390_r0, 0, 32);
3273                         s390_m    (code, s390_r0, 0, ins->sreg2, 4);
3274                         s390_l    (code, s390_r0, 0, ins->sreg1, 4);
3275                         s390_srl  (code, s390_r0, 0, 31);
3276                         s390_a    (code, s390_r0, 0, ins->sreg1, 0);
3277                         s390_l    (code, s390_r13, 0, ins->sreg2, 0);
3278                         s390_srl  (code, s390_r13, 0, 31);
3279                         s390_ms   (code, s390_r13, 0, ins->sreg1, 4);
3280                         s390_ar   (code, s390_r0, s390_r13);
3281                         s390_st   (code, s390_r0, 0, ins->dreg, 0);
3282                         s390_st   (code, s390_r1, 0, ins->dreg, 4);
3283                 }
3284                         break;
3285                 case OP_ICONST: {
3286                         if (s390_is_imm16(ins->inst_c0)) {
3287                                 s390_lhi  (code, ins->dreg, ins->inst_c0);
3288                         } else {
3289                                 s390_basr (code, s390_r13, 0);
3290                                 s390_j    (code, 4);
3291                                 s390_word (code, ins->inst_c0);
3292                                 s390_l    (code, ins->dreg, 0, s390_r13, 4);
3293                         }
3294                 }
3295                         break;
3296                 case OP_AOTCONST: {
3297                         s390_basr (code, s390_r13, 0);
3298                         s390_j    (code, 4);
3299                         mono_add_patch_info (cfg, code - cfg->native_code,
3300                                 (MonoJumpInfoType)ins->inst_i1, ins->inst_p0);
3301                         s390_word (code, 0);
3302                         s390_l    (code,ins->dreg, 0, s390_r13, 4);
3303                 }
3304                         break;
3305                 case OP_ICONV_TO_I4:
3306                 case OP_ICONV_TO_U4:
3307                 case OP_MOVE: {
3308                         if (ins->dreg != ins->sreg1) {
3309                                 s390_lr (code, ins->dreg, ins->sreg1);
3310                         }
3311                 }
3312                         break;
3313                 case OP_SETLRET: {
3314                         int saved = ins->sreg1;
3315                         if (ins->sreg1 == s390_r2) {
3316                                 s390_lr (code, s390_r0, ins->sreg1);
3317                                 saved = s390_r0;
3318                         }
3319                         if (ins->sreg2 != s390_r2)
3320                                 s390_lr (code, s390_r2, ins->sreg2);
3321                         if (saved != s390_r3)
3322                                 s390_lr (code, s390_r3, saved);
3323                         break;
3324                 }
3325                 case OP_FMOVE: {
3326                         if (ins->dreg != ins->sreg1) {
3327                                 s390_ldr   (code, ins->dreg, ins->sreg1);
3328                         }
3329                 }
3330                         break;
3331                 case OP_S390_SETF4RET: {
3332                         s390_ledbr (code, ins->dreg, ins->sreg1);
3333                 }
3334                         break;
3335                 case OP_TLS_GET: {
3336                         if (s390_is_imm16 (ins->inst_offset)) {
3337                                 s390_lhi (code, s390_r13, ins->inst_offset);
3338                         } else {
3339                                 s390_bras (code, s390_r13, 0);
3340                                 s390_j    (code, 4);
3341                                 s390_word (code, ins->inst_offset);
3342                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3343                         }
3344                         s390_ear (code, s390_r1, 0);
3345                         s390_l   (code, ins->dreg, s390_r13, s390_r1, 0);
3346                 }
3347                         break;
3348                 case OP_FCONV_TO_R4: {
3349                         NOT_IMPLEMENTED;
3350                         next = mono_inst_list_next (&ins->node, &bb->ins_list);
3351                         if ((next) &&
3352                              (next->opcode != OP_FMOVE) &&
3353                              (next->opcode != OP_STORER4_MEMBASE_REG))
3354                                 s390_ledbr (code, ins->dreg, ins->sreg1);
3355                 }
3356                         break;
3357                 case OP_JMP: {
3358                         if (cfg->method->save_lmf)
3359                                 restoreLMF(code, cfg->frame_reg, cfg->stack_usage);
3360
3361                         if (cfg->flags & MONO_CFG_HAS_TAIL) {
3362                                 code = emit_load_volatile_registers(code, cfg);
3363                         }
3364
3365                         code = backUpStackPtr(cfg, code, STK_BASE);
3366                         s390_l   (code, s390_r14, 0, STK_BASE, S390_RET_ADDR_OFFSET);
3367                         mono_add_patch_info (cfg, code - cfg->native_code,
3368                                              MONO_PATCH_INFO_METHOD_JUMP,
3369                                              ins->inst_p0);
3370                         s390_jcl (code, S390_CC_UN, 0);
3371                 }
3372                         break;
3373                 case OP_CHECK_THIS: {
3374                         /* ensure ins->sreg1 is not NULL */
3375                         s390_icm (code, s390_r0, 15, ins->sreg1, 0);
3376                 }
3377                         break;
3378                 case OP_ARGLIST: {
3379                         int offset = cfg->sig_cookie + cfg->stack_usage;
3380
3381                         if (s390_is_imm16 (offset))
3382                                 s390_lhi  (code, s390_r0, offset);
3383                         else {
3384                                 s390_basr (code, s390_r13, 0);
3385                                 s390_j    (code, 4);
3386                                 s390_word (code, offset);
3387                                 s390_l    (code, s390_r0, 0, s390_r13, 0);
3388                         }
3389                         s390_ar   (code, s390_r0, cfg->frame_reg);
3390                         s390_st   (code, s390_r0, 0, ins->sreg1, 0);
3391                 }
3392                         break;
3393                 case OP_FCALL: {
3394                         call = (MonoCallInst*)ins;
3395                         if (ins->flags & MONO_INST_HAS_METHOD)
3396                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_METHOD,
3397                                                      call->method);
3398                         else
3399                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS,
3400                                                      call->fptr);
3401                         s390_brasl (code, s390_r14, 0);
3402                         if (call->signature->ret->type == MONO_TYPE_R4)
3403                                 s390_ldebr (code, s390_f0, s390_f0);
3404                 }
3405                         break;
3406                 case OP_LCALL:
3407                 case OP_VCALL:
3408                 case OP_VOIDCALL:
3409                 case OP_CALL: {
3410                         call = (MonoCallInst*)ins;
3411                         if (ins->flags & MONO_INST_HAS_METHOD)
3412                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_METHOD, call->method);
3413                         else
3414                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS, call->fptr);
3415                         s390_brasl (code, s390_r14, 0);
3416                 }
3417                         break;
3418                 case OP_FCALL_REG: {
3419                         call = (MonoCallInst*)ins;
3420                         s390_lr   (code, s390_r1, ins->sreg1);
3421                         s390_basr (code, s390_r14, s390_r1);
3422                         if (call->signature->ret->type == MONO_TYPE_R4)
3423                                 s390_ldebr (code, s390_f0, s390_f0);
3424                 }
3425                         break;
3426                 case OP_LCALL_REG:
3427                 case OP_VCALL_REG:
3428                 case OP_VOIDCALL_REG:
3429                 case OP_CALL_REG: {
3430                         s390_lr   (code, s390_r1, ins->sreg1);
3431                         s390_basr (code, s390_r14, s390_r1);
3432                 }
3433                         break;
3434                 case OP_FCALL_MEMBASE: {
3435                         call = (MonoCallInst*)ins;
3436                         s390_l    (code, s390_r1, 0, ins->sreg1, ins->inst_offset);
3437                         s390_basr (code, s390_r14, s390_r1);
3438                         if (call->signature->ret->type == MONO_TYPE_R4)
3439                                 s390_ldebr (code, s390_f0, s390_f0);
3440                 }
3441                         break;
3442                 case OP_LCALL_MEMBASE:
3443                 case OP_VCALL_MEMBASE:
3444                 case OP_VOIDCALL_MEMBASE:
3445                 case OP_CALL_MEMBASE: {
3446                         s390_l    (code, s390_r1, 0, ins->sreg1, ins->inst_offset);
3447                         s390_basr (code, s390_r14, s390_r1);
3448                 }
3449                         break;
3450                 case OP_OUTARG:
3451                         g_assert_not_reached ();
3452                         break;
3453                 case OP_LOCALLOC: {
3454                         /*------------------------------------------*/
3455                         /* To allocate space on the stack we have   */
3456                         /* to allow room for parameters passed in   */
3457                         /* calls, the backchain pointer and round   */
3458                         /* it to our stack alignment requirements   */
3459                         /*------------------------------------------*/
3460                         int alloca_skip = S390_MINIMAL_STACK_SIZE + cfg->param_area;
3461                         int area_offset = S390_ALIGN(alloca_skip, S390_STACK_ALIGNMENT);
3462                         s390_lr   (code, s390_r1, ins->sreg1);
3463                         if (ins->flags & MONO_INST_INIT)
3464                                 s390_lr   (code, s390_r0, ins->sreg1);
3465                         s390_ahi  (code, s390_r1, 14);
3466                         s390_srl  (code, s390_r1, 0, 3);
3467                         s390_sll  (code, s390_r1, 0, 3);
3468                         if (cfg->method->save_lmf) {
3469                                 /*----------------------------------*/
3470                                 /* we have to adjust lmf ebp value  */
3471                                 /*----------------------------------*/
3472                                 int lmfOffset = cfg->stack_usage - sizeof(MonoLMF);
3473
3474                                 s390_lr (code, s390_r13, cfg->frame_reg);
3475                                 if (s390_is_uimm16(lmfOffset))
3476                                         s390_ahi   (code, s390_r13, lmfOffset);
3477                                 else {
3478                                         s390_basr (code, s390_r14, 0);
3479                                         s390_j    (code, 4);
3480                                         s390_word (code, lmfOffset);
3481                                         s390_a    (code, s390_r13, 0, s390_r14, 4);
3482                                 }
3483                                 s390_lr (code, s390_r14, STK_BASE);
3484                                 s390_sr (code, s390_r14, s390_r1);
3485                                 s390_st (code, s390_r14, 0, s390_r13,
3486                                          G_STRUCT_OFFSET(MonoLMF, ebp));
3487                         }
3488                         s390_l    (code, s390_r13, 0, STK_BASE, 0);
3489                         s390_sr   (code, STK_BASE, s390_r1);
3490                         s390_st   (code, s390_r13, 0, STK_BASE, 0);
3491                         s390_la   (code, ins->dreg, 0, STK_BASE, area_offset);
3492                         s390_srl  (code, ins->dreg, 0, 3);
3493                         s390_sll  (code, ins->dreg, 0, 3);
3494                         if (ins->flags & MONO_INST_INIT) {
3495                                 s390_lr   (code, s390_r1, s390_r0);
3496                                 s390_lr   (code, s390_r0, ins->dreg);
3497                                 s390_lr   (code, s390_r14, s390_r12);
3498                                 s390_lhi  (code, s390_r13, 0);
3499                                 s390_mvcle(code, s390_r0, s390_r12, 0, 0);
3500                                 s390_jo   (code, -2);
3501                                 s390_lr   (code, s390_r12, s390_r14);
3502                         }
3503                 }
3504                         break;
3505                 case OP_THROW: {
3506                         s390_lr (code, s390_r2, ins->sreg1);
3507                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD,
3508                                              (gpointer)"mono_arch_throw_exception");
3509                         s390_brasl (code, s390_r14, 0);
3510                 }
3511                         break;
3512                 case OP_RETHROW: {
3513                         s390_lr (code, s390_r2, ins->sreg1);
3514                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD,
3515                                              (gpointer)"mono_arch_rethrow_exception");
3516                         s390_brasl (code, s390_r14, 0);
3517                 }
3518                         break;
3519                 case OP_START_HANDLER: {
3520                         if (s390_is_uimm12 (ins->inst_left->inst_offset)) {
3521                                 s390_st   (code, s390_r14, 0,
3522                                            ins->inst_left->inst_basereg,
3523                                            ins->inst_left->inst_offset);
3524                         } else {
3525                                 s390_basr (code, s390_r13, 0);
3526                                 s390_j    (code, 4);
3527                                 s390_word (code, ins->inst_left->inst_offset);
3528                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3529                                 s390_st   (code, s390_r14, s390_r13,
3530                                            ins->inst_left->inst_basereg, 0);
3531                         }
3532                 }
3533                         break;
3534                 case OP_ENDFILTER: {
3535                         if (ins->sreg1 != s390_r2)
3536                                 s390_lr (code, s390_r2, ins->sreg1);
3537                         if (s390_is_uimm12 (ins->inst_left->inst_offset)) {
3538                                 s390_l  (code, s390_r14, 0, ins->inst_left->inst_basereg,
3539                                          ins->inst_left->inst_offset);
3540                         } else {
3541                                 s390_basr (code, s390_r13, 0);
3542                                 s390_j    (code, 4);
3543                                 s390_word (code, ins->inst_left->inst_offset);
3544                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3545                                 s390_l    (code, s390_r14, s390_r13,
3546                                            ins->inst_left->inst_basereg, 0);
3547                         }
3548                         s390_br  (code, s390_r14);
3549                 }
3550                         break;
3551                 case OP_ENDFINALLY: {
3552                         if (s390_is_uimm12 (ins->inst_left->inst_offset)) {
3553                                 s390_l  (code, s390_r14, 0, ins->inst_left->inst_basereg,
3554                                          ins->inst_left->inst_offset);
3555                         } else {
3556                                 s390_basr (code, s390_r13, 0);
3557                                 s390_j    (code, 4);
3558                                 s390_word (code, ins->inst_left->inst_offset);
3559                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3560                                 s390_l    (code, s390_r14, s390_r13,
3561                                            ins->inst_left->inst_basereg, 0);
3562                         }
3563                         s390_br  (code, s390_r14);
3564                 }
3565                         break;
3566                 case OP_CALL_HANDLER: {
3567                         mono_add_patch_info (cfg, code-cfg->native_code,
3568                                              MONO_PATCH_INFO_BB, ins->inst_target_bb);
3569                         s390_brasl (code, s390_r14, 0);
3570                 }
3571                         break;
3572                 case OP_LABEL: {
3573                         ins->inst_c0 = code - cfg->native_code;
3574                 }
3575                         break;
3576                 case OP_BR:
3577                         EMIT_UNCOND_BRANCH(ins);
3578                         break;
3579                 case OP_BR_REG: {
3580                         s390_br  (code, ins->sreg1);
3581                 }
3582                         break;
3583                 case OP_CEQ: {
3584                         s390_lhi (code, ins->dreg, 1);
3585                         s390_jz  (code, 4);
3586                         s390_lhi (code, ins->dreg, 0);
3587                 }
3588                         break;
3589                 case OP_CLT: {
3590                         s390_lhi (code, ins->dreg, 1);
3591                         s390_jl  (code, 4);
3592                         s390_lhi (code, ins->dreg, 0);
3593                 }
3594                         break;
3595                 case OP_CLT_UN: {
3596                         s390_lhi (code, ins->dreg, 1);
3597                         s390_jlo (code, 4);
3598                         s390_lhi (code, ins->dreg, 0);
3599                 }
3600                         break;
3601                 case OP_CGT: {
3602                         s390_lhi (code, ins->dreg, 1);
3603                         s390_jh  (code, 4);
3604                         s390_lhi (code, ins->dreg, 0);
3605                 }
3606                         break;
3607                 case OP_CGT_UN: {
3608                         s390_lhi (code, ins->dreg, 1);
3609                         s390_jho (code, 4);
3610                         s390_lhi (code, ins->dreg, 0);
3611                 }
3612                         break;
3613                 case OP_COND_EXC_EQ:
3614                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_EQ, ins->inst_p1);
3615                         break;
3616                 case OP_COND_EXC_NE_UN:
3617                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NE, ins->inst_p1);
3618                         break;
3619                 case OP_COND_EXC_LT:
3620                 case OP_COND_EXC_LT_UN:
3621                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, ins->inst_p1);
3622                         break;
3623                 case OP_COND_EXC_GT:
3624                 case OP_COND_EXC_GT_UN:
3625                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GT, ins->inst_p1);
3626                         break;
3627                 case OP_COND_EXC_GE:
3628                 case OP_COND_EXC_GE_UN:
3629                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GE, ins->inst_p1);
3630                         break;
3631                 case OP_COND_EXC_LE:
3632                 case OP_COND_EXC_LE_UN:
3633                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LE, ins->inst_p1);
3634                         break;
3635                 case OP_COND_EXC_OV:
3636                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, ins->inst_p1);
3637                         break;
3638                 case OP_COND_EXC_NO:
3639                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NO, ins->inst_p1);
3640                         break;
3641                 case OP_COND_EXC_C:
3642                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, ins->inst_p1);
3643                         break;
3644                 case OP_COND_EXC_NC:
3645                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, ins->inst_p1);
3646                         break;
3647                 case OP_IBEQ:
3648                         EMIT_COND_BRANCH (ins, S390_CC_EQ);
3649                         break;
3650                 case OP_IBNE_UN:
3651                         EMIT_COND_BRANCH (ins, S390_CC_NE);
3652                         break;
3653                 case OP_IBLT:
3654                 case OP_IBLT_UN:
3655                         EMIT_COND_BRANCH (ins, S390_CC_LT);
3656                         break;
3657                 case OP_IBGT:
3658                 case OP_IBGT_UN:
3659                         EMIT_COND_BRANCH (ins, S390_CC_GT);
3660                         break;
3661                 case OP_IBGE:
3662                 case OP_IBGE_UN:
3663                         EMIT_COND_BRANCH (ins, S390_CC_GE);
3664                         break;
3665                 case OP_IBLE:
3666                 case OP_IBLE_UN:
3667                         EMIT_COND_BRANCH (ins, S390_CC_LE);
3668                         break;
3669
3670                 /* floating point opcodes */
3671                 case OP_R8CONST: {
3672                         if (*((float *) ins->inst_p0) == 0) {
3673                                 s390_lzdr (code, ins->dreg);
3674                         } else {
3675                                 s390_basr  (code, s390_r13, 0);
3676                                 s390_j     (code, 4);
3677                                 s390_word  (code, ins->inst_p0);
3678                                 s390_l     (code, s390_r13, 0, s390_r13, 4);
3679                                 s390_ld    (code, ins->dreg, 0, s390_r13, 0);
3680                         }
3681                 }
3682                         break;
3683                 case OP_R4CONST: {
3684                         if (*((float *) ins->inst_p0) == 0) {
3685                                 s390_lzdr (code, ins->dreg);
3686                         } else {
3687                                 s390_basr (code, s390_r13, 0);
3688                                 s390_j    (code, 4);
3689                                 s390_word (code, ins->inst_p0);
3690                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3691                                 s390_ldeb (code, ins->dreg, 0, s390_r13, 0);
3692                         }
3693                 }
3694                         break;
3695                 case OP_STORER8_MEMBASE_REG: {
3696                         if (s390_is_uimm12(ins->inst_offset)) {
3697                                 s390_std  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
3698                         } else {
3699                                 s390_basr (code, s390_r13, 0);
3700                                 s390_j    (code, 4);
3701                                 s390_word (code, ins->inst_offset);
3702                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3703                                 s390_std  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
3704                         }
3705                 }
3706                         break;
3707                 case OP_LOADR8_MEMBASE: {
3708                         if (s390_is_uimm12(ins->inst_offset)) {
3709                                 s390_ld   (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
3710                         } else {
3711                                 s390_basr (code, s390_r13, 0);
3712                                 s390_j    (code, 4);
3713                                 s390_word (code, ins->inst_offset);
3714                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3715                                 s390_ld   (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
3716                         }
3717                 }
3718                         break;
3719                 case OP_STORER4_MEMBASE_REG: {
3720                         if (s390_is_uimm12(ins->inst_offset)) {
3721                                 s390_ledbr(code, s390_f15, ins->sreg1);
3722                                 s390_ste  (code, s390_f15, 0, ins->inst_destbasereg, ins->inst_offset);
3723                         } else {
3724                                 s390_basr (code, s390_r13, 0);
3725                                 s390_j    (code, 4);
3726                                 s390_word (code, ins->inst_offset);
3727                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3728                                 s390_ledbr(code, s390_f15, ins->sreg1);
3729                                 s390_ste  (code, s390_f15, s390_r13, ins->inst_destbasereg, 0);
3730                         }
3731                 }
3732                         break;
3733                 case OP_LOADR4_MEMBASE: {
3734                         if (s390_is_uimm12(ins->inst_offset)) {
3735                                 s390_ldeb (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
3736                         } else {
3737                                 s390_basr (code, s390_r13, 0);
3738                                 s390_j    (code, 4);
3739                                 s390_word (code, ins->inst_offset);
3740                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3741                                 s390_ldeb (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
3742                         }
3743                 }
3744                         break;
3745                 case OP_ICONV_TO_R_UN: {
3746                         s390_cdfbr (code, ins->dreg, ins->sreg1);
3747                         s390_ltr   (code, ins->sreg1, ins->sreg1);
3748                         s390_jnl   (code, 12);
3749                         s390_basr  (code, s390_r13, 0);
3750                         s390_j     (code, 6);
3751                         s390_word  (code, 0x41f00000);
3752                         s390_word  (code, 0);
3753                         s390_adb   (code, ins->dreg, 0, s390_r13, 4);
3754                 }
3755                         break;
3756                 case OP_ICONV_TO_R4: {
3757                         s390_cdfbr (code, ins->dreg, ins->sreg1);
3758                 }
3759                         break;
3760                 case OP_ICONV_TO_R8: {
3761                         s390_cdfbr (code, ins->dreg, ins->sreg1);
3762                 }
3763                         break;
3764                 case OP_FCONV_TO_I1:
3765                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 1, TRUE);
3766                         break;
3767                 case OP_FCONV_TO_U1:
3768                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 1, FALSE);
3769                         break;
3770                 case OP_FCONV_TO_I2:
3771                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 2, TRUE);
3772                         break;
3773                 case OP_FCONV_TO_U2:
3774                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 2, FALSE);
3775                         break;
3776                 case OP_FCONV_TO_I4:
3777                 case OP_FCONV_TO_I:
3778                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 4, TRUE);
3779                         break;
3780                 case OP_FCONV_TO_U4:
3781                 case OP_FCONV_TO_U:
3782                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 4, FALSE);
3783                         break;
3784                 case OP_FCONV_TO_I8:
3785                 case OP_FCONV_TO_U8:
3786                         g_assert_not_reached ();
3787                         /* Implemented as helper calls */
3788                         break;
3789                 case OP_LCONV_TO_R_UN:
3790                         g_assert_not_reached ();
3791                         /* Implemented as helper calls */
3792                         break;
3793                 case OP_LCONV_TO_OVF_I: {
3794                         /* Valid ints: 0xffffffff:8000000 to 00000000:0x7f000000 */
3795                         short int *o[5];
3796                         s390_ltr  (code, ins->sreg1, ins->sreg1);
3797                         s390_jnl  (code, 0); CODEPTR(code, o[0]);
3798                         s390_ltr  (code, ins->sreg2, ins->sreg2);
3799                         s390_jnl  (code, 0); CODEPTR(code, o[1]);
3800                         s390_lhi  (code, s390_r13, -1);
3801                         s390_cr   (code, ins->sreg2, s390_r13);
3802                         s390_jnz  (code, 0); CODEPTR(code, o[2]);
3803                         if (ins->dreg != ins->sreg1)
3804                                 s390_lr   (code, ins->dreg, ins->sreg1);
3805                         s390_j    (code, 0); CODEPTR(code, o[3]);
3806                         PTRSLOT(code, o[0]);
3807                         s390_ltr  (code, ins->sreg2, ins->sreg2);
3808                         s390_jz   (code, 0); CODEPTR(code, o[4]);
3809                         PTRSLOT(code, o[1]);
3810                         PTRSLOT(code, o[2]);
3811                         mono_add_patch_info (cfg, code - cfg->native_code,
3812                                              MONO_PATCH_INFO_EXC, "OverflowException");
3813                         s390_brasl (code, s390_r14, 0);
3814                         PTRSLOT(code, o[3]);
3815                         PTRSLOT(code, o[4]);
3816                 }
3817                         break;
3818                 case OP_SQRT: {
3819                         s390_sqdbr (code, ins->dreg, ins->sreg1);
3820                 }
3821                         break;
3822                 case OP_FADD: {
3823                         CHECK_SRCDST_COM_F;
3824                         s390_adbr (code, ins->dreg, src2);
3825                 }
3826                         break;
3827                 case OP_FSUB: {
3828                         CHECK_SRCDST_NCOM_F;
3829                         s390_sdbr (code, ins->dreg, src2);
3830                 }
3831                         break;
3832                 case OP_FMUL: {
3833                         CHECK_SRCDST_COM_F;
3834                         s390_mdbr (code, ins->dreg, src2);
3835                 }
3836                         break;
3837                 case OP_FDIV: {
3838                         CHECK_SRCDST_NCOM_F;
3839                         s390_ddbr (code, ins->dreg, src2);
3840                 }
3841                         break;
3842                 case OP_FNEG: {
3843                         s390_lcdbr (code, ins->dreg, ins->sreg1);
3844                 }
3845                         break;
3846                 case OP_FREM: {
3847                         CHECK_SRCDST_NCOM_F;
3848                         s390_didbr (code, ins->dreg, src2, 5, s390_f15);
3849                 }
3850                         break;
3851                 case OP_FCOMPARE: {
3852                         s390_cdbr (code, ins->sreg1, ins->sreg2);
3853                 }
3854                         break;
3855                 case OP_FCEQ: {
3856                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3857                         s390_lhi   (code, ins->dreg, 1);
3858                         s390_je    (code, 4);
3859                         s390_lhi   (code, ins->dreg, 0);
3860                 }
3861                         break;
3862                 case OP_FCLT: {
3863                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3864                         s390_lhi   (code, ins->dreg, 1);
3865                         s390_jl    (code, 4);
3866                         s390_lhi   (code, ins->dreg, 0);
3867                 }
3868                         break;
3869                 case OP_FCLT_UN: {
3870                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3871                         s390_lhi   (code, ins->dreg, 1);
3872                         s390_jlo   (code, 4);
3873                         s390_lhi   (code, ins->dreg, 0);
3874                 }
3875                         break;
3876                 case OP_FCGT: {
3877                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3878                         s390_lhi   (code, ins->dreg, 1);
3879                         s390_jh    (code, 4);
3880                         s390_lhi   (code, ins->dreg, 0);
3881                 }
3882                         break;
3883                 case OP_FCGT_UN: {
3884                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3885                         s390_lhi   (code, ins->dreg, 1);
3886                         s390_jho   (code, 4);
3887                         s390_lhi   (code, ins->dreg, 0);
3888                 }
3889                         break;
3890                 case OP_FBEQ: {
3891                         short *o;
3892                         s390_jo (code, 0); CODEPTR(code, o);
3893                         EMIT_COND_BRANCH (ins, S390_CC_EQ);
3894                         PTRSLOT(code, o);
3895                 }
3896                         break;
3897                 case OP_FBNE_UN:
3898                         EMIT_COND_BRANCH (ins, S390_CC_NE|S390_CC_OV);
3899                         break;
3900                 case OP_FBLT: {
3901                         short *o;
3902                         s390_jo (code, 0); CODEPTR(code, o);
3903                         EMIT_COND_BRANCH (ins, S390_CC_LT);
3904                         PTRSLOT(code, o);
3905                 }
3906                         break;
3907                 case OP_FBLT_UN:
3908                         EMIT_COND_BRANCH (ins, S390_CC_LT|S390_CC_OV);
3909                         break;
3910                 case OP_FBGT: {
3911                         short *o;
3912                         s390_jo (code, 0); CODEPTR(code, o);
3913                         EMIT_COND_BRANCH (ins, S390_CC_GT);
3914                         PTRSLOT(code, o);
3915                 }
3916                         break;
3917                 case OP_FBGT_UN:
3918                         EMIT_COND_BRANCH (ins, S390_CC_GT|S390_CC_OV);
3919                         break;
3920                 case OP_FBGE: {
3921                         short *o;
3922                         s390_jo (code, 0); CODEPTR(code, o);
3923                         EMIT_COND_BRANCH (ins, S390_CC_GE);
3924                         PTRSLOT(code, o);
3925                 }
3926                         break;
3927                 case OP_FBGE_UN:
3928                         EMIT_COND_BRANCH (ins, S390_CC_GE|S390_CC_OV);
3929                         break;
3930                 case OP_FBLE: {
3931                         short *o;
3932                         s390_jo (code, 0); CODEPTR(code, o);
3933                         EMIT_COND_BRANCH (ins, S390_CC_LE);
3934                         PTRSLOT(code, o);
3935                 }
3936                         break;
3937                 case OP_FBLE_UN:
3938                         EMIT_COND_BRANCH (ins, S390_CC_LE|S390_CC_OV);
3939                         break;
3940                 case OP_CKFINITE: {
3941                         short *o;
3942                         s390_lhi  (code, s390_r13, 0x7f);
3943                         s390_tcdb (code, ins->sreg1, 0, s390_r13, 0);
3944                         s390_jz   (code, 0); CODEPTR(code, o);
3945                         mono_add_patch_info (cfg, code - cfg->native_code,
3946                                              MONO_PATCH_INFO_EXC, "ArithmeticException");
3947                         s390_brasl (code, s390_r14,0);
3948                         PTRSLOT(code, o);
3949                 }
3950                         break;
3951                 case OP_S390_MOVE: {
3952                         if (ins->backend.size > 0) {
3953                                 if (ins->backend.size <= 256) {
3954                                         s390_mvc  (code, ins->backend.size, ins->dreg,
3955                                                    ins->inst_offset, ins->sreg1, ins->inst_imm);
3956                                 } else {
3957                                         s390_lr   (code, s390_r0, ins->dreg);
3958                                         if (s390_is_imm16 (ins->inst_offset)) {
3959                                                 s390_ahi  (code, s390_r0, ins->inst_offset);
3960                                         } else {
3961                                                 s390_basr (code, s390_r13, 0);
3962                                                 s390_j    (code, 4);
3963                                                 s390_word (code, ins->inst_offset);
3964                                                 s390_a    (code, s390_r0, 0, s390_r13, 4);
3965                                         }
3966                                         s390_lr   (code, s390_r14, s390_r12);
3967                                         s390_lr   (code, s390_r12, ins->sreg1);
3968                                         if (s390_is_imm16 (ins->inst_imm)) {
3969                                                 s390_ahi  (code, s390_r12, ins->inst_imm);
3970                                         } else {
3971                                                 s390_basr (code, s390_r13, 0);
3972                                                 s390_j    (code, 4);
3973                                                 s390_word (code, ins->inst_imm);
3974                                                 s390_a    (code, s390_r12, 0, s390_r13, 4);
3975                                         }
3976                                         s390_lr   (code, s390_r1, ins->sreg1);
3977                                         s390_lr   (code, s390_r13, s390_r1);
3978                                         s390_mvcle(code, s390_r0, s390_r12, 0, 0);
3979                                         s390_jo   (code, -2);
3980                                         s390_lr   (code, s390_r12, s390_r14);
3981                                 }
3982                         }
3983                 }
3984                         break;
3985                 case OP_ATOMIC_ADD_I4: {
3986                         s390_lr  (code, s390_r1, ins->sreg2);
3987                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
3988                         s390_a   (code, s390_r1, 0, ins->inst_basereg, ins->inst_offset);
3989                         s390_cs  (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
3990                         s390_jnz (code, -7);
3991                         s390_lr  (code, ins->dreg, s390_r1);
3992                 }
3993                         break;
3994                 case OP_ATOMIC_ADD_NEW_I4: {
3995                         s390_lr  (code, s390_r1, ins->sreg2);
3996                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
3997                         s390_a   (code, s390_r1, 0, ins->inst_basereg, ins->inst_offset);
3998                         s390_cs  (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
3999                         s390_jnz (code, -7);
4000                         s390_lr  (code, ins->dreg, s390_r1);
4001                 }
4002                         break;
4003                 case OP_ATOMIC_EXCHANGE_I4: {
4004                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4005                         s390_cs  (code, s390_r0, ins->sreg2, ins->inst_basereg, ins->inst_offset);
4006                         s390_jnz (code, -4);
4007                         s390_lr  (code, ins->dreg, s390_r0);
4008                 }
4009                         break;
4010                 case OP_S390_BKCHAIN: {
4011                         s390_lr  (code, ins->dreg, ins->sreg1);
4012                         if (s390_is_imm16 (cfg->stack_offset)) {
4013                                 s390_ahi (code, ins->dreg, cfg->stack_offset);
4014                         } else {
4015                                 s390_basr (code, s390_r13, 0);
4016                                 s390_j    (code, 6);
4017                                 s390_word (code, cfg->stack_offset);
4018                                 s390_a    (code, ins->dreg, 0, s390_r13, 4);
4019                         }
4020                 }
4021                 case OP_MEMORY_BARRIER: {
4022                 }
4023                         break;
4024                 default:
4025                         g_warning ("unknown opcode %s in %s()\n", mono_inst_name (ins->opcode), __FUNCTION__);
4026                         g_assert_not_reached ();
4027                 }
4028
4029                 if ((cfg->opt & MONO_OPT_BRANCH) && ((code - cfg->native_code - offset) > max_len)) {
4030                         g_warning ("wrong maximal instruction length of instruction %s (expected %d, got %d)",
4031                                    mono_inst_name (ins->opcode), max_len, code - cfg->native_code - offset);
4032                         g_assert_not_reached ();
4033                 }
4034
4035                 cpos += max_len;
4036
4037                 last_offset = offset;
4038         }
4039
4040         cfg->code_len = code - cfg->native_code;
4041 }
4042
4043 /*========================= End of Function ========================*/
4044
4045 /*------------------------------------------------------------------*/
4046 /*                                                                  */
4047 /* Name         - mono_arch_register_lowlevel_calls                 */
4048 /*                                                                  */
4049 /* Function     - Register routines to help with --trace operation. */
4050 /*                                                                  */
4051 /*------------------------------------------------------------------*/
4052
4053 void
4054 mono_arch_register_lowlevel_calls (void)
4055 {
4056         mono_register_jit_icall (mono_arch_get_lmf_addr, "mono_arch_get_lmf_addr", NULL, TRUE);
4057 }
4058
4059 /*========================= End of Function ========================*/
4060
4061 /*------------------------------------------------------------------*/
4062 /*                                                                  */
4063 /* Name         - mono_arch_patch_code                              */
4064 /*                                                                  */
4065 /* Function     - Process the patch data created during the         */
4066 /*                instruction build process. This resolves jumps,   */
4067 /*                calls, variables etc.                             */
4068 /*                                                                  */
4069 /*------------------------------------------------------------------*/
4070
4071 void
4072 mono_arch_patch_code (MonoMethod *method, MonoDomain *domain,
4073                       guint8 *code, MonoJumpInfo *ji, gboolean run_cctors)
4074 {
4075         MonoJumpInfo *patch_info;
4076
4077         for (patch_info = ji; patch_info; patch_info = patch_info->next) {
4078                 unsigned char *ip = patch_info->ip.i + code;
4079                 gconstpointer target = NULL;
4080
4081                 target = mono_resolve_patch_target (method, domain, code,
4082                                                     patch_info, run_cctors);
4083
4084                 switch (patch_info->type) {
4085                         case MONO_PATCH_INFO_IP:
4086                         case MONO_PATCH_INFO_EXC_NAME:
4087                         case MONO_PATCH_INFO_LDSTR:
4088                         case MONO_PATCH_INFO_TYPE_FROM_HANDLE:
4089                         case MONO_PATCH_INFO_LDTOKEN:
4090                         case MONO_PATCH_INFO_EXC:
4091                                 continue;
4092                         case MONO_PATCH_INFO_SWITCH:
4093                                 /*----------------------------------*/
4094                                 /* ip points at the basr r13,0/j +4 */
4095                                 /* instruction the vtable value     */
4096                                 /* follows this (i.e. ip+6)         */
4097                                 /*----------------------------------*/
4098                                 *((gconstpointer *)(ip+6)) = target;
4099                                 target = NULL;
4100                                 continue;
4101                         case MONO_PATCH_INFO_METHODCONST:
4102                         case MONO_PATCH_INFO_CLASS:
4103                         case MONO_PATCH_INFO_IMAGE:
4104                         case MONO_PATCH_INFO_FIELD:
4105                         case MONO_PATCH_INFO_IID:
4106                                 target = S390_RELATIVE(target, ip);
4107                                 continue;
4108                         case MONO_PATCH_INFO_R4:
4109                         case MONO_PATCH_INFO_R8:
4110                         case MONO_PATCH_INFO_METHOD_REL:
4111                                 g_assert_not_reached ();
4112                                 continue;
4113                         default:
4114                                 target = S390_RELATIVE(target, ip);
4115                                 ip += 2;
4116                 }
4117                 s390_patch (ip, (guint32) target);
4118         }
4119 }
4120
4121 /*========================= End of Function ========================*/
4122
4123 /*------------------------------------------------------------------*/
4124 /*                                                                  */
4125 /* Name         - emit_load_volatile_registers                      */
4126 /*                                                                  */
4127 /* Function     - Create the instruction sequence for loading the   */
4128 /*                parameter registers for use with the 'tail' op.   */
4129 /*                                                                  */
4130 /*                The register loading operations performed here    */
4131 /*                are the mirror of the store operations performed  */
4132 /*                in mono_arch_emit_prolog and need to be kept in   */
4133 /*                synchronization with it.                          */
4134 /*                                                                  */
4135 /*------------------------------------------------------------------*/
4136
4137 guint8 *
4138 emit_load_volatile_registers(guint8 * code, MonoCompile *cfg)
4139 {
4140         MonoMethod *method = cfg->method;
4141         MonoMethodSignature *sig;
4142         MonoInst *inst;
4143         int pos, i;
4144         CallInfo *cinfo;
4145         size_data sz;
4146
4147         sig = mono_method_signature (method);
4148         pos = 0;
4149
4150         cinfo = calculate_sizes (NULL, sig, &sz, sig->pinvoke);
4151
4152         if (cinfo->struct_ret) {
4153                 ArgInfo *ainfo = &cinfo->ret;
4154                 inst         = cfg->vret_addr;
4155                 s390_l (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4156         }
4157
4158         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
4159                 ArgInfo *ainfo = cinfo->args + i;
4160                 inst = cfg->args [pos];
4161
4162                 if (inst->opcode == OP_REGVAR) {
4163                         if (ainfo->regtype == RegTypeGeneral)
4164                                 s390_lr (code, ainfo->reg, inst->dreg);
4165                         else if (ainfo->regtype == RegTypeFP) {
4166                                 if (inst->dreg != ainfo->reg) {
4167                                         if (ainfo->size == 4) {
4168                                                 s390_ldebr (code, ainfo->reg, inst->dreg);
4169                                         } else {
4170                                                 s390_ldr   (code, ainfo->reg, inst->dreg);
4171                                         }
4172                                 }
4173                         }
4174                         else if (ainfo->regtype == RegTypeBase) {
4175                         } else
4176                                 g_assert_not_reached ();
4177                 } else {
4178                         if (ainfo->regtype == RegTypeGeneral) {
4179                                 if (!((ainfo->reg >= 2) && (ainfo->reg <= 6)))
4180                                         g_assert_not_reached();
4181                                 switch (ainfo->size) {
4182                                 case 1:
4183                                         s390_ic (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4184                                         break;
4185                                 case 2:
4186                                         s390_lh (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4187                                         break;
4188                                 case 8:
4189                                         s390_lm (code, ainfo->reg, ainfo->reg + 1,
4190                                                   inst->inst_basereg, inst->inst_offset);
4191                                         break;
4192                                 default:
4193                                         s390_l  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4194                                 }
4195                         } else if (ainfo->regtype == RegTypeBase) {
4196                         } else if (ainfo->regtype == RegTypeFP) {
4197                                 if (ainfo->size == 8)
4198                                         s390_ld (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4199                                 else if (ainfo->size == 4)
4200                                         s390_le (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4201                                 else
4202                                         g_assert_not_reached ();
4203                         } else if (ainfo->regtype == RegTypeStructByVal) {
4204                                 if (ainfo->reg != STK_BASE) {
4205                                         switch (ainfo->size) {
4206                                         case 1:
4207                                                 s390_ic (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4208                                                 break;
4209                                         case 2:
4210                                                 s390_lh (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4211                                                 break;
4212                                         case 4:
4213                                                 s390_l  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4214                                                 break;
4215                                         case 8:
4216                                                 s390_lm (code, ainfo->reg, ainfo->reg+1, inst->inst_basereg, inst->inst_offset);
4217                                                 break;
4218                                         }
4219                                 }
4220                         } else if (ainfo->regtype == RegTypeStructByAddr) {
4221                                 if (ainfo->reg != STK_BASE) {
4222                                         s390_l  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4223                                 }
4224                         } else
4225                                 g_assert_not_reached ();
4226                 }
4227                 pos++;
4228         }
4229
4230         g_free (cinfo);
4231
4232         return code;
4233 }
4234
4235 /*========================= End of Function ========================*/
4236
4237 /*------------------------------------------------------------------*/
4238 /*                                                                  */
4239 /* Name         - mono_arch_emit_prolog                             */
4240 /*                                                                  */
4241 /* Function     - Create the instruction sequence for a function    */
4242 /*                prolog.                                           */
4243 /*                                                                  */
4244 /*------------------------------------------------------------------*/
4245
4246 guint8 *
4247 mono_arch_emit_prolog (MonoCompile *cfg)
4248 {
4249         MonoMethod *method = cfg->method;
4250         MonoBasicBlock *bb;
4251         MonoMethodSignature *sig;
4252         MonoInst *inst;
4253         int alloc_size, pos, max_offset, i;
4254         guint8 *code;
4255         CallInfo *cinfo;
4256         size_data sz;
4257         int tracing = 0;
4258         int lmfOffset;                                                          \
4259
4260         if (mono_jit_trace_calls != NULL && mono_trace_eval (method))
4261                 tracing = 1;
4262
4263         cfg->code_size   = 512;
4264         cfg->native_code = code = g_malloc (cfg->code_size);
4265
4266         s390_stm  (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
4267
4268         if (cfg->flags & MONO_CFG_HAS_ALLOCA) {
4269                 cfg->used_int_regs |= 1 << 11;
4270         }
4271
4272         alloc_size = cfg->stack_offset;
4273
4274         cfg->stack_usage = alloc_size;
4275         s390_lr   (code, s390_r11, STK_BASE);
4276         if (s390_is_uimm16 (alloc_size)) {
4277                 s390_ahi  (code, STK_BASE, -alloc_size);
4278         } else {
4279                 int stackSize = alloc_size;
4280                 while (stackSize > 32767) {
4281                         s390_ahi  (code, STK_BASE, -32767);
4282                         stackSize -= 32767;
4283                 }
4284                 s390_ahi  (code, STK_BASE, -stackSize);
4285         }
4286         s390_st   (code, s390_r11, 0, STK_BASE, 0);
4287
4288         if (cfg->frame_reg != STK_BASE)
4289                 s390_lr (code, s390_r11, STK_BASE);
4290
4291         /* compute max_offset in order to use short forward jumps
4292          * we always do it on s390 because the immediate displacement
4293          * for jumps is too small
4294          */
4295         max_offset = 0;
4296         for (bb = cfg->bb_entry; bb; bb = bb->next_bb) {
4297                 MonoInst *ins;
4298                 bb->max_offset = max_offset;
4299
4300                 if (cfg->prof_options & MONO_PROFILE_COVERAGE)
4301                         max_offset += 6;
4302
4303                 MONO_BB_FOR_EACH_INS (bb, ins)
4304                         max_offset += ((guint8 *)ins_get_spec (ins->opcode))[MONO_INST_LEN];
4305         }
4306
4307         /* load arguments allocated to register from the stack */
4308         sig = mono_method_signature (method);
4309         pos = 0;
4310
4311         cinfo = calculate_sizes (cfg, sig, &sz, sig->pinvoke);
4312
4313         if (cinfo->struct_ret) {
4314                 ArgInfo *ainfo = &cinfo->ret;
4315                 inst         = cfg->vret_addr;
4316                 inst->backend.size = ainfo->vtsize;
4317                 s390_st (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4318         }
4319
4320         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
4321                 ArgInfo *ainfo = cinfo->args + i;
4322                 inst = cfg->args [pos];
4323
4324                 if (inst->opcode == OP_REGVAR) {
4325                         if (ainfo->regtype == RegTypeGeneral)
4326                                 s390_lr (code, inst->dreg, ainfo->reg);
4327                         else if (ainfo->regtype == RegTypeFP) {
4328                                 if (inst->dreg != ainfo->reg) {
4329                                         if (ainfo->size == 4) {
4330                                                 s390_ledbr (code, inst->dreg, ainfo->reg);
4331                                         } else {
4332                                                 s390_ldr   (code, inst->dreg, ainfo->reg);
4333                                         }
4334                                 }
4335                         }
4336                         else if (ainfo->regtype == RegTypeBase) {
4337                                 s390_lr  (code, s390_r13, STK_BASE);
4338                                 s390_ahi (code, s390_r13, alloc_size);
4339                                 s390_l   (code, inst->dreg, 0, s390_r13, ainfo->offset);
4340                         } else
4341                                 g_assert_not_reached ();
4342
4343                         if (cfg->verbose_level > 2)
4344                                 g_print ("Argument %d assigned to register %s\n",
4345                                          pos, mono_arch_regname (inst->dreg));
4346                 } else {
4347                         if (ainfo->regtype == RegTypeGeneral) {
4348                                 if (!((ainfo->reg >= 2) && (ainfo->reg <= 6)))
4349                                         g_assert_not_reached();
4350                                 switch (ainfo->size) {
4351                                 case 1:
4352                                         s390_stc (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4353                                         break;
4354                                 case 2:
4355                                         s390_sth (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4356                                         break;
4357                                 case 8:
4358                                         s390_stm (code, ainfo->reg, ainfo->reg + 1,
4359                                                   inst->inst_basereg, inst->inst_offset);
4360                                         break;
4361                                 default:
4362                                         s390_st  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4363                                 }
4364                         } else if (ainfo->regtype == RegTypeBase) {
4365                         } else if (ainfo->regtype == RegTypeFP) {
4366                                 if (ainfo->size == 8)
4367                                         s390_std (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4368                                 else if (ainfo->size == 4)
4369                                         s390_ste (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4370                                 else
4371                                         g_assert_not_reached ();
4372                         } else if (ainfo->regtype == RegTypeStructByVal) {
4373                                 int doffset = inst->inst_offset;
4374                                 int reg;
4375                                 if (ainfo->reg != STK_BASE)
4376                                         reg = ainfo->reg;
4377                                 else {
4378                                         reg = s390_r0;
4379                                         s390_lr  (code, s390_r13, STK_BASE);
4380                                         s390_ahi (code, s390_r13, alloc_size);
4381                                 }
4382                                 switch (ainfo->size) {
4383                                         case 1:
4384                                                 if (ainfo->reg == STK_BASE)
4385                                                         s390_ic  (code, reg, 0, s390_r13, ainfo->offset+3);
4386                                                 s390_stc (code, reg, 0, inst->inst_basereg, doffset);
4387                                                 break;
4388                                         case 2:
4389                                                 if (ainfo->reg == STK_BASE)
4390                                                         s390_lh  (code, reg, 0, s390_r13, ainfo->offset+2);
4391                                                 s390_sth (code, reg, 0, inst->inst_basereg, doffset);
4392                                                 break;
4393                                         case 4:
4394                                                 if (ainfo->reg == STK_BASE)
4395                                                         s390_l   (code, reg, 0, s390_r13, ainfo->offset);
4396                                                 s390_st  (code, reg, 0, inst->inst_basereg, doffset);
4397                                                 break;
4398                                         case 8:
4399                                                 if (ainfo->reg == STK_BASE)
4400                                                         s390_lm  (code, s390_r0, s390_r1, s390_r13, ainfo->offset);
4401                                                 s390_stm (code, reg, reg+1, inst->inst_basereg, doffset);
4402                                                 break;
4403                                 }
4404                         } else if (ainfo->regtype == RegTypeStructByAddr) {
4405                                 if (ainfo->reg != STK_BASE)
4406                                         s390_st  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4407                         } else
4408                                 g_assert_not_reached ();
4409                 }
4410                 pos++;
4411         }
4412
4413         if (method->save_lmf) {
4414                 /*---------------------------------------------------------------*/
4415                 /* we build the MonoLMF structure on the stack - see mini-s390.h */
4416                 /*---------------------------------------------------------------*/
4417                 lmfOffset = alloc_size - sizeof(MonoLMF);
4418
4419                 s390_lr    (code, s390_r13, cfg->frame_reg);
4420                 if (s390_is_uimm16(lmfOffset))
4421                         s390_ahi   (code, s390_r13, lmfOffset);
4422                 else {
4423                         s390_basr (code, s390_r14, 0);
4424                         s390_j    (code, 4);
4425                         s390_word (code, lmfOffset);
4426                         s390_a    (code, s390_r13, 0, s390_r14, 4);
4427                 }
4428
4429                 /*---------------------------------------------------------------*/
4430                 /* Preserve the parameter registers while we fix up the lmf      */
4431                 /*---------------------------------------------------------------*/
4432                 s390_stm   (code, s390_r2, s390_r6, s390_r13,
4433                             G_STRUCT_OFFSET(MonoLMF, pregs[0]));
4434
4435                 /*---------------------------------------------------------------*/
4436                 /* On return from this call r2 have the address of the &lmf      */
4437                 /*---------------------------------------------------------------*/
4438                 mono_add_patch_info (cfg, code - cfg->native_code,
4439                                      MONO_PATCH_INFO_INTERNAL_METHOD,
4440                                      (gpointer)"mono_get_lmf_addr");
4441                 s390_brasl (code, s390_r14, 0);
4442
4443                 /*---------------------------------------------------------------*/
4444                 /* Set lmf.lmf_addr = jit_tls->lmf                               */
4445                 /*---------------------------------------------------------------*/
4446                 s390_st    (code, s390_r2, 0, s390_r13,
4447                             G_STRUCT_OFFSET(MonoLMF, lmf_addr));
4448
4449                 /*---------------------------------------------------------------*/
4450                 /* Get current lmf                                               */
4451                 /*---------------------------------------------------------------*/
4452                 s390_l     (code, s390_r0, 0, s390_r2, 0);
4453
4454                 /*---------------------------------------------------------------*/
4455                 /* Set our lmf as the current lmf                                */
4456                 /*---------------------------------------------------------------*/
4457                 s390_st    (code, s390_r13, 0, s390_r2, 0);
4458
4459                 /*---------------------------------------------------------------*/
4460                 /* Have our lmf.previous_lmf point to the last lmf               */
4461                 /*---------------------------------------------------------------*/
4462                 s390_st    (code, s390_r0, 0, s390_r13,
4463                             G_STRUCT_OFFSET(MonoLMF, previous_lmf));
4464
4465                 /*---------------------------------------------------------------*/
4466                 /* save method info                                              */
4467                 /*---------------------------------------------------------------*/
4468                 s390_basr  (code, s390_r1, 0);
4469                 s390_j     (code, 4);
4470                 s390_word  (code, method);
4471                 s390_l     (code, s390_r1, 0, s390_r1, 4);
4472                 s390_st    (code, s390_r1, 0, s390_r13,
4473                             G_STRUCT_OFFSET(MonoLMF, method));
4474
4475                 /*---------------------------------------------------------------*/
4476                 /* save the current IP                                           */
4477                 /*---------------------------------------------------------------*/
4478                 s390_st    (code, STK_BASE, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, ebp));
4479                 s390_basr  (code, s390_r1, 0);
4480                 s390_la    (code, s390_r1, 0, s390_r1, 0);
4481                 s390_st    (code, s390_r1, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, eip));
4482
4483                 /*---------------------------------------------------------------*/
4484                 /* Save general and floating point registers                     */
4485                 /*---------------------------------------------------------------*/
4486                 s390_stm   (code, s390_r2, s390_r12, s390_r13,
4487                             G_STRUCT_OFFSET(MonoLMF, gregs[2]));
4488                 for (i = 0; i < 16; i++) {
4489                         s390_std  (code, i, 0, s390_r13,
4490                                    G_STRUCT_OFFSET(MonoLMF, fregs[i]));
4491                 }
4492
4493                 /*---------------------------------------------------------------*/
4494                 /* Restore the parameter registers now that we've set up the lmf */
4495                 /*---------------------------------------------------------------*/
4496                 s390_lm    (code, s390_r2, s390_r6, s390_r13,
4497                             G_STRUCT_OFFSET(MonoLMF, pregs[0]));
4498         }
4499
4500         if (tracing)
4501                 code = mono_arch_instrument_prolog(cfg, enter_method, code, TRUE);
4502
4503         cfg->code_len = code - cfg->native_code;
4504         g_free (cinfo);
4505
4506         return code;
4507 }
4508
4509 /*========================= End of Function ========================*/
4510
4511 /*------------------------------------------------------------------*/
4512 /*                                                                  */
4513 /* Name         - mono_arch_emit_epilog                             */
4514 /*                                                                  */
4515 /* Function     - Emit the instructions for a function epilog.      */
4516 /*                                                                  */
4517 /*------------------------------------------------------------------*/
4518
4519 void
4520 mono_arch_emit_epilog (MonoCompile *cfg)
4521 {
4522         MonoMethod *method = cfg->method;
4523         int tracing = 0;
4524         guint8 *code;
4525         int max_epilog_size = 96;
4526
4527         if (cfg->method->save_lmf)
4528                 max_epilog_size += 128;
4529
4530         if (mono_jit_trace_calls != NULL)
4531                 max_epilog_size += 128;
4532
4533         if (cfg->prof_options & MONO_PROFILE_ENTER_LEAVE)
4534                 max_epilog_size += 128;
4535
4536         while ((cfg->code_len + max_epilog_size) > (cfg->code_size - 16)) {
4537                 cfg->code_size  *= 2;
4538                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
4539                 mono_jit_stats.code_reallocs++;
4540         }
4541
4542         code = cfg->native_code + cfg->code_len;
4543
4544         if (mono_jit_trace_calls != NULL && mono_trace_eval (method)) {
4545                 code = mono_arch_instrument_epilog (cfg, leave_method, code, TRUE);
4546                 tracing = 1;
4547         }
4548
4549         if (method->save_lmf)
4550                 restoreLMF(code, cfg->frame_reg, cfg->stack_usage);
4551
4552         if (cfg->flags & MONO_CFG_HAS_ALLOCA)
4553                 s390_l (code, STK_BASE, 0, STK_BASE, 0);
4554         else
4555                 code = backUpStackPtr(cfg, code, STK_BASE);
4556
4557         s390_lm  (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
4558         s390_br  (code, s390_r14);
4559
4560         cfg->code_len = code - cfg->native_code;
4561
4562         g_assert (cfg->code_len < cfg->code_size);
4563
4564 }
4565
4566 /*========================= End of Function ========================*/
4567
4568 /*------------------------------------------------------------------*/
4569 /*                                                                  */
4570 /* Name         - mono_arch_emit_exceptions                         */
4571 /*                                                                  */
4572 /* Function     - Emit the blocks to handle exception conditions.   */
4573 /*                                                                  */
4574 /*------------------------------------------------------------------*/
4575
4576 void
4577 mono_arch_emit_exceptions (MonoCompile *cfg)
4578 {
4579         MonoJumpInfo    *patch_info;
4580         guint8          *code;
4581         int             nThrows = 0,
4582                         exc_count = 0,
4583                         iExc;
4584         guint32         code_size;
4585         MonoClass       *exc_classes [MAX_EXC];
4586         guint8          *exc_throw_start [MAX_EXC];
4587
4588         for (patch_info = cfg->patch_info;
4589              patch_info;
4590              patch_info = patch_info->next) {
4591                 if (patch_info->type == MONO_PATCH_INFO_EXC)
4592                         exc_count++;
4593         }
4594
4595         code_size = exc_count * 26;
4596
4597         while ((cfg->code_len + code_size) > (cfg->code_size - 16)) {
4598                 cfg->code_size  *= 2;
4599                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
4600                 mono_jit_stats.code_reallocs++;
4601         }
4602
4603         code = cfg->native_code + cfg->code_len;
4604
4605         /*---------------------------------------------------------------------*/
4606         /* Add code to raise exceptions                                        */
4607         /*---------------------------------------------------------------------*/
4608         for (patch_info = cfg->patch_info; patch_info; patch_info = patch_info->next) {
4609                 switch (patch_info->type) {
4610                 case MONO_PATCH_INFO_EXC: {
4611                         guint8 *ip = patch_info->ip.i + cfg->native_code;
4612                         MonoClass *exc_class;
4613                         guint32 throw_ip;
4614
4615                         /*-----------------------------------------------------*/
4616                         /* Patch the branch in epilog to come here             */
4617                         /*-----------------------------------------------------*/
4618                         s390_patch (ip + 2, (guint32) (S390_RELATIVE(code,ip)));
4619
4620                         exc_class = mono_class_from_name (mono_defaults.corlib,
4621                                                           "System",
4622                                                           patch_info->data.name);
4623                         g_assert (exc_class);
4624                         throw_ip = patch_info->ip.i;
4625
4626                         for (iExc = 0; iExc < nThrows; ++iExc)
4627                                 if (exc_classes [iExc] == exc_class)
4628                                         break;
4629
4630                         if (iExc < nThrows) {
4631                                 s390_jcl (code, S390_CC_UN, (guint32) exc_throw_start [iExc]);
4632                                 patch_info->type = MONO_PATCH_INFO_NONE;
4633                         } else {
4634
4635                                 if (nThrows < MAX_EXC) {
4636                                         exc_classes [nThrows]     = exc_class;
4637                                         exc_throw_start [nThrows] = code;
4638                                 }
4639
4640                                 /*---------------------------------------------*/
4641                                 /* Patch the parameter passed to the handler   */
4642                                 /*---------------------------------------------*/
4643                                 s390_basr (code, s390_r13, 0);
4644                                 s390_j    (code, 4);
4645                                 s390_word (code, patch_info->data.target);
4646                                 /*---------------------------------------------*/
4647                                 /* Load return address & parameter register    */
4648                                 /*---------------------------------------------*/
4649                                 s390_larl (code, s390_r14, (gsize)S390_RELATIVE((patch_info->ip.i +
4650                                                            cfg->native_code + 8), code));
4651                                 s390_l    (code, s390_r2, 0, s390_r13, 4);
4652                                 /*---------------------------------------------*/
4653                                 /* Reuse the current patch to set the jump     */
4654                                 /*---------------------------------------------*/
4655                                 patch_info->type      = MONO_PATCH_INFO_INTERNAL_METHOD;
4656                                 patch_info->data.name = "mono_arch_throw_exception_by_name";
4657                                 patch_info->ip.i      = code - cfg->native_code;
4658                                 s390_jcl  (code, S390_CC_UN, 0);
4659                         }
4660                         break;
4661                 }
4662                 default:
4663                         /* do nothing */
4664                         break;
4665                 }
4666         }
4667
4668         cfg->code_len = code - cfg->native_code;
4669
4670         g_assert (cfg->code_len < cfg->code_size);
4671
4672 }
4673
4674 /*========================= End of Function ========================*/
4675
4676 /*------------------------------------------------------------------*/
4677 /*                                                                  */
4678 /* Name         - mono_arch_setup_jit_tls_data                      */
4679 /*                                                                  */
4680 /* Function     - Setup the JIT's Thread Level Specific Data.       */
4681 /*                                                                  */
4682 /*------------------------------------------------------------------*/
4683
4684 void
4685 mono_arch_setup_jit_tls_data (MonoJitTlsData *tls)
4686 {
4687
4688         if (!tls_offset_inited) {
4689                 tls_offset_inited = TRUE;
4690
4691 #if HAVE_KW_THREAD
4692 # if 0
4693         __asm__ ("\tear\t%r1,0\n"
4694                  "\tlr\t%0,%3\n"
4695                  "\tsr\t%0,%r1\n"
4696                  "\tlr\t%1,%4\n"
4697                  "\tsr\t%1,%r1\n"
4698                  "\tlr\t%2,%5\n"
4699                  "\tsr\t%2,%r1\n"
4700                  : "=r" (appdomain_tls_offset),
4701                    "=r" (thread_tls_offset),
4702                    "=r" (lmf_tls_offset)
4703                  : "r" (&tls_appdomain),
4704                    "r" (&tls_current_object),
4705                    "r" (&mono_lmf_addr)
4706                  : "1", "cc");
4707 # endif
4708 #endif
4709         }
4710
4711         if (!lmf_addr_key_inited) {
4712                 lmf_addr_key_inited = TRUE;
4713                 pthread_key_create (&lmf_addr_key, NULL);
4714         }
4715         pthread_setspecific (lmf_addr_key, &tls->lmf);
4716
4717 }
4718
4719 /*========================= End of Function ========================*/
4720
4721 /*------------------------------------------------------------------*/
4722 /*                                                                  */
4723 /* Name         - mono_arch_free_jit_tls_data                       */
4724 /*                                                                  */
4725 /* Function     - Free tls data.                                    */
4726 /*                                                                  */
4727 /*------------------------------------------------------------------*/
4728
4729 void
4730 mono_arch_free_jit_tls_data (MonoJitTlsData *tls)
4731 {
4732
4733 }
4734
4735 /*========================= End of Function ========================*/
4736
4737 /*------------------------------------------------------------------*/
4738 /*                                                                  */
4739 /* Name         - mono_arch_emit_this_vret_args                     */
4740 /*                                                                  */
4741 /* Function     -                                                   */
4742 /*                                                                  */
4743 /*------------------------------------------------------------------*/
4744
4745 void
4746 mono_arch_emit_this_vret_args (MonoCompile *cfg, MonoCallInst *inst, int this_reg, int this_type, int vt_reg)
4747 {
4748         int this_dreg = s390_r2;
4749
4750         if (vt_reg != -1)
4751                 this_dreg = s390_r3;
4752
4753         /* add the this argument */
4754         if (this_reg != -1) {
4755                 MonoInst *this;
4756                 MONO_INST_NEW (cfg, this, OP_MOVE);
4757                 this->type  = this_type;
4758                 this->sreg1 = this_reg;
4759                 this->dreg  = mono_regstate_next_int (cfg->rs);
4760                 mono_bblock_add_inst (cfg->cbb, this);
4761                 mono_call_inst_add_outarg_reg (cfg, inst, this->dreg, this_dreg, FALSE);
4762         }
4763
4764         if (vt_reg != -1) {
4765                 MonoInst *vtarg;
4766                 MONO_INST_NEW (cfg, vtarg, OP_MOVE);
4767                 vtarg->type  = STACK_MP;
4768                 vtarg->sreg1 = vt_reg;
4769                 vtarg->dreg  = mono_regstate_next_int (cfg->rs);
4770                 mono_bblock_add_inst (cfg->cbb, vtarg);
4771                 mono_call_inst_add_outarg_reg (cfg, inst, vtarg->dreg, s390_r2, FALSE);
4772         }
4773 }
4774
4775 /*========================= End of Function ========================*/
4776
4777 /*------------------------------------------------------------------*/
4778 /*                                                                  */
4779 /* Name         - mono_arch_get_inst_for_method                   */
4780 /*                                                                  */
4781 /* Function     - Check for opcodes we can handle directly in       */
4782 /*                hardware.                                         */
4783 /*                                                                  */
4784 /*------------------------------------------------------------------*/
4785
4786 MonoInst*
4787 mono_arch_get_inst_for_method (MonoCompile *cfg, MonoMethod *cmethod,
4788                                MonoMethodSignature *fsig, MonoInst **args)
4789 {
4790         MonoInst *ins = NULL;
4791
4792         if (cmethod->klass == mono_defaults.math_class) {
4793                 if (strcmp (cmethod->name, "Sqrt") == 0) {
4794                         MONO_INST_NEW (cfg, ins, OP_SQRT);
4795                         ins->inst_i0 = args [0];
4796                 }
4797         }
4798
4799         return ins;
4800 }
4801
4802 /*========================= End of Function ========================*/
4803
4804 /*------------------------------------------------------------------*/
4805 /*                                                                  */
4806 /* Name         - mono_arch_print_tree                              */
4807 /*                                                                  */
4808 /* Function     - Print platform-specific opcode details.           */
4809 /*                                                                  */
4810 /* Returns      - 1 - opcode details have been printed              */
4811 /*                0 - opcode details have not been printed          */
4812 /*                                                                  */
4813 /*------------------------------------------------------------------*/
4814
4815 gboolean
4816 mono_arch_print_tree (MonoInst *tree, int arity)
4817 {
4818         gboolean done;
4819
4820         switch (tree->opcode) {
4821                 case OP_S390_LOADARG:
4822                 case OP_S390_ARGREG:
4823                 case OP_S390_ARGPTR:
4824                         printf ("[0x%lx(%s)]", tree->inst_offset,
4825                                 mono_arch_regname (tree->inst_basereg));
4826                         done = 1;
4827                         break;
4828                 case OP_S390_STKARG:
4829                         printf ("[0x%lx(previous_frame)]",
4830                                 tree->inst_offset);
4831                         done = 1;
4832                         break;
4833                 case OP_S390_MOVE:
4834                         printf ("[0x%lx(%d,%s),0x%lx(%s)]",
4835                                 tree->inst_offset, tree->backend.size,
4836                                 mono_arch_regname(tree->dreg), tree->inst_imm,
4837                                 mono_arch_regname(tree->sreg1));
4838                         done = 1;
4839                         break;
4840                 case OP_S390_SETF4RET:
4841                         printf ("[%s,%s]",
4842                                 mono_arch_fregname (tree->dreg),
4843                                 mono_arch_fregname (tree->sreg1));
4844                         done = 1;
4845                         break;
4846                 case OP_TLS_GET:
4847                         printf ("[0x%lx(0x%lx,%s)]", tree->inst_offset,
4848                                 tree->inst_imm,
4849                                 mono_arch_regname (tree->sreg1));
4850                         done = 1;
4851                         break;
4852                 case OP_S390_BKCHAIN:
4853                         printf ("[previous_frame(%s)]",
4854                                 mono_arch_regname (tree->sreg1));
4855                         done = 1;
4856                         break;
4857                 default:
4858                         done = 0;
4859         }
4860         return (done);
4861 }
4862
4863 /*========================= End of Function ========================*/
4864
4865 /*------------------------------------------------------------------*/
4866 /*                                                                  */
4867 /* Name         - mono_arch_regalloc_cost                           */
4868 /*                                                                  */
4869 /* Function     - Determine the cost, in the number of memory       */
4870 /*                references, of the action of allocating the var-  */
4871 /*                iable VMV into a register during global register  */
4872 /*                allocation.                                       */
4873 /*                                                                  */
4874 /* Returns      - Cost                                              */
4875 /*                                                                  */
4876 /*------------------------------------------------------------------*/
4877
4878 guint32
4879 mono_arch_regalloc_cost (MonoCompile *cfg, MonoMethodVar *vmv)
4880 {
4881         /* FIXME: */
4882         return 2;
4883 }
4884
4885 /*========================= End of Function ========================*/
4886
4887 /*------------------------------------------------------------------*/
4888 /*                                                                  */
4889 /* Name         - mono_arch_get_domain_intrinsic                    */
4890 /*                                                                  */
4891 /* Function     -                                                   */
4892 /*                                                                  */
4893 /* Returns      -                                                   */
4894 /*                                                                  */
4895 /*------------------------------------------------------------------*/
4896
4897 MonoInst *
4898 mono_arch_get_domain_intrinsic (MonoCompile* cfg)
4899 {
4900         MonoInst *ins;
4901
4902         if (appdomain_tls_offset == -1)
4903                 return NULL;
4904
4905         MONO_INST_NEW (cfg, ins, OP_TLS_GET);
4906         ins->inst_offset = appdomain_tls_offset;
4907         return (ins);
4908 }
4909
4910 /*========================= End of Function ========================*/
4911
4912 /*------------------------------------------------------------------*/
4913 /*                                                                  */
4914 /* Name         - mono_arch_get_thread_intrinsic                    */
4915 /*                                                                  */
4916 /* Function     -                                                   */
4917 /*                                                                  */
4918 /* Returns      -                                                   */
4919 /*                                                                  */
4920 /*------------------------------------------------------------------*/
4921
4922 MonoInst *
4923 mono_arch_get_thread_intrinsic (MonoCompile* cfg)
4924 {
4925         MonoInst *ins;
4926
4927         if (thread_tls_offset == -1)
4928                 return NULL;
4929
4930         MONO_INST_NEW (cfg, ins, OP_TLS_GET);
4931         ins->inst_offset = thread_tls_offset;
4932         return (ins);
4933 }
4934
4935 /*========================= End of Function ========================*/
4936
4937 /*------------------------------------------------------------------*/
4938 /*                                                                  */
4939 /* Name         - mono_arch_flush_register_windows                  */
4940 /*                                                                  */
4941 /* Function     -                                                   */
4942 /*                                                                  */
4943 /* Returns      -                                                   */
4944 /*                                                                  */
4945 /*------------------------------------------------------------------*/
4946
4947 void
4948 mono_arch_flush_register_windows (void)
4949 {
4950 }
4951
4952 /*========================= End of Function ========================*/
4953
4954 /*------------------------------------------------------------------*/
4955 /*                                                                  */
4956 /* Name         - mono_arch_get_lmf_addr                            */
4957 /*                                                                  */
4958 /* Function     -                                                   */
4959 /*                                                                  */
4960 /* Returns      -                                                   */
4961 /*                                                                  */
4962 /*------------------------------------------------------------------*/
4963
4964 gpointer
4965 mono_arch_get_lmf_addr (void)
4966 {
4967         return pthread_getspecific (lmf_addr_key);
4968 }
4969
4970
4971 /*========================= End of Function ========================*/
4972
4973 /*------------------------------------------------------------------*/
4974 /*                                                                  */
4975 /* Name         - mono_arch_get_patch_offset                        */
4976 /*                                                                  */
4977 /* Function     - Dummy entry point until s390x supports aot.       */
4978 /*                                                                  */
4979 /* Returns      - Offset for patch.                                 */
4980 /*                                                                  */
4981 /*------------------------------------------------------------------*/
4982
4983 guint32
4984 mono_arch_get_patch_offset (guint8 *code)
4985 {
4986         return 0;
4987 }
4988
4989 /*========================= End of Function ========================*/
4990
4991 gpointer
4992 mono_arch_context_get_int_reg (MonoContext *ctx, int reg)
4993 {
4994         /* FIXME: implement */
4995         g_assert_not_reached ();
4996 }