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 void peephole_pass (MonoCompile *, MonoBasicBlock *);
 252 static guchar * emit_float_to_int (MonoCompile *, guchar *, int, int, int, gboolean);
 253 gpointer mono_arch_get_lmf_addr (void);
 254 static guint8 * emit_load_volatile_registers(guint8 *, MonoCompile *);
 255 static void emit_sig_cookie (MonoCompile *, MonoCallInst *, CallInfo *, int);
 256
 257 /*========================= End of Prototypes ======================*/
 258
 259 /*------------------------------------------------------------------*/
 260 /*                 G l o b a l   V a r i a b l e s                  */
 261 /*------------------------------------------------------------------*/
 262
 263 int mono_exc_esp_offset = 0;
 264
 265 static int indent_level = 0;
 266
 267 static gboolean tls_offset_inited = FALSE;
 268
 269 static int appdomain_tls_offset = -1,
 270            lmf_tls_offset = -1,
 271            thread_tls_offset = -1;
 272
 273 pthread_key_t lmf_addr_key;
 274
 275 gboolean lmf_addr_key_inited = FALSE;
 276
 277 #if 0
 278
 279 extern __thread MonoDomain *tls_appdomain;
 280 extern __thread MonoThread *tls_current_object;
 281 extern __thread gpointer   mono_lmf_addr;
 282
 283 #endif
 284
 285 /*====================== End of Global Variables ===================*/
 286
 287 /*------------------------------------------------------------------*/
 288 /*                                                                  */
 289 /* Name         - mono_arch_regname                                 */
 290 /*                                                                  */
 291 /* Function     - Returns the name of the register specified by     */
 292 /*                the input parameter.                              */
 293 /*                                                                  */
 294 /*------------------------------------------------------------------*/
 295
 296 const char*
 297 mono_arch_regname (int reg) {
 298         static const char * rnames[] = {
 299                 "s390_r0", "s390_sp", "s390_r2", "s390_r3", "s390_r4",
 300                 "s390_r5", "s390_r6", "s390_r7", "s390_r8", "s390_r9",
 301                 "s390_r10", "s390_r11", "s390_r12", "s390_r13", "s390_r14",
 302                 "s390_r15"
 303         };
 304
 305         if (reg >= 0 && reg < 16)
 306                 return rnames [reg];
 307         else
 308                 return "unknown";
 309 }
 310
 311 /*========================= End of Function ========================*/
 312
 313 /*------------------------------------------------------------------*/
 314 /*                                                                  */
 315 /* Name         - mono_arch_fregname                                */
 316 /*                                                                  */
 317 /* Function     - Returns the name of the register specified by     */
 318 /*                the input parameter.                              */
 319 /*                                                                  */
 320 /*------------------------------------------------------------------*/
 321
 322 const char*
 323 mono_arch_fregname (int reg) {
 324         static const char * rnames[] = {
 325                 "s390_f0", "s390_f1", "s390_f2", "s390_f3", "s390_f4",
 326                 "s390_f5", "s390_f6", "s390_f7", "s390_f8", "s390_f9",
 327                 "s390_f10", "s390_f11", "s390_f12", "s390_f13", "s390_f14",
 328                 "s390_f15"
 329         };
 330
 331         if (reg >= 0 && reg < 16)
 332                 return rnames [reg];
 333         else
 334                 return "unknown";
 335 }
 336
 337 /*========================= End of Function ========================*/
 338
 339 /*------------------------------------------------------------------*/
 340 /*                                                                  */
 341 /* Name         - arch_get_argument_info                            */
 342 /*                                                                  */
 343 /* Function     - Gathers information on parameters such as size,   */
 344 /*                alignment, and padding. arg_info should be large  */
 345 /*                enough to hold param_count + 1 entries.           */
 346 /*                                                                  */
 347 /* Parameters   - @csig - Method signature                          */
 348 /*                @param_count - No. of parameters to consider      */
 349 /*                @arg_info - An array to store the result info     */
 350 /*                                                                  */
 351 /* Returns      - Size of the activation frame                      */
 352 /*                                                                  */
 353 /*------------------------------------------------------------------*/
 354
 355 int
 356 mono_arch_get_argument_info (MonoMethodSignature *csig,
 357                              int param_count,
 358                              MonoJitArgumentInfo *arg_info)
 359 {
 360         int k, frame_size = 0;
 361         int size, align, pad;
 362         int offset = 8;
 363
 364         if (MONO_TYPE_ISSTRUCT (csig->ret)) {
 365                 frame_size += sizeof (gpointer);
 366                 offset += 4;
 367         }
 368
 369         arg_info [0].offset = offset;
 370
 371         if (csig->hasthis) {
 372                 frame_size += sizeof (gpointer);
 373                 offset += 4;
 374         }
 375
 376         arg_info [0].size = frame_size;
 377
 378         for (k = 0; k < param_count; k++) {
 379
 380                 if (csig->pinvoke)
 381                         size = mono_type_native_stack_size (csig->params [k], &align);
 382                 else
 383                         size = mini_type_stack_size (NULL, csig->params [k], &align);
 384
 385                 frame_size += pad = (align - (frame_size & (align - 1))) & (align - 1);
 386                 arg_info [k].pad = pad;
 387                 frame_size += size;
 388                 arg_info [k + 1].pad = 0;
 389                 arg_info [k + 1].size = size;
 390                 offset += pad;
 391                 arg_info [k + 1].offset = offset;
 392                 offset += size;
 393         }
 394
 395         align = MONO_ARCH_FRAME_ALIGNMENT;
 396         frame_size += pad = (align - (frame_size & (align - 1))) & (align - 1);
 397         arg_info [k].pad = pad;
 398
 399         return frame_size;
 400 }
 401
 402 /*========================= End of Function ========================*/
 403
 404 /*------------------------------------------------------------------*/
 405 /*                                                                  */
 406 /* Name         - retFitsInReg.                                     */
 407 /*                                                                  */
 408 /* Function     - Determines if a value can be returned in one or   */
 409 /*                two registers.                                    */
 410 /*                                                                  */
 411 /*------------------------------------------------------------------*/
 412
 413 static inline gboolean
 414 retFitsInReg(guint32 size)
 415 {
 416         switch (size) {
 417                 case 0:
 418                 case 1:
 419                 case 2:
 420                 case 4:
 421                 case 8:
 422                         return (TRUE);
 423                 break;
 424                 default:
 425                         return (FALSE);
 426         }
 427 }
 428
 429 /*========================= End of Function ========================*/
 430
 431 /*------------------------------------------------------------------*/
 432 /*                                                                  */
 433 /* Name         - backStackPtr.                                     */
 434 /*                                                                  */
 435 /* Function     - Restore Stack Pointer to previous frame.          */
 436 /*                                                                  */
 437 /*------------------------------------------------------------------*/
 438
 439 static inline guint8 *
 440 backUpStackPtr(MonoCompile *cfg, guint8 *code, gint framePtr)
 441 {
 442         int stackSize = cfg->stack_usage;
 443
 444         if (s390_is_uimm16 (cfg->stack_usage)) {
 445                 s390_ahi  (code, framePtr, cfg->stack_usage);
 446         } else {
 447                 while (stackSize > 32767) {
 448                         s390_ahi  (code, framePtr, 32767);
 449                         stackSize -= 32767;
 450                 }
 451                 s390_ahi  (code, framePtr, stackSize);
 452         }
 453         return (code);
 454 }
 455
 456 /*========================= End of Function ========================*/
 457
 458 /*------------------------------------------------------------------*/
 459 /*                                                                  */
 460 /* Name         - indent                                            */
 461 /*                                                                  */
 462 /* Function     - Perform nice indenting to current level           */
 463 /*                                                                  */
 464 /*------------------------------------------------------------------*/
 465
 466 static void
 467 indent (int diff) {
 468         int v;
 469         if (diff < 0)
 470                 indent_level += diff;
 471         v = indent_level;
 472         printf("[%3d] ",v);
 473         while (v-- > 0) {
 474                 printf (". ");
 475         }
 476         if (diff > 0)
 477                 indent_level += diff;
 478 }
 479
 480 /*========================= End of Function ========================*/
 481
 482 /*------------------------------------------------------------------*/
 483 /*                                                                  */
 484 /* Name         - decodeParm                                        */
 485 /*                                                                  */
 486 /* Function     - Decode a parameter for the trace.                 */
 487 /*                                                                  */
 488 /*------------------------------------------------------------------*/
 489
 490 static void
 491 decodeParm(MonoType *type, void *curParm, int size)
 492 {
 493         guint32 simpleType;
 494
 495         if (type->byref) {
 496                 printf("[BYREF:%p], ", *((char **) curParm));
 497         } else {
 498                 simpleType = mono_type_get_underlying_type(type)->type;
 499 enum_parmtype:
 500                 switch (simpleType) {
 501                         case MONO_TYPE_I :
 502                                 printf ("[INTPTR:%p], ", *((int **) curParm));
 503                                 break;
 504                         case MONO_TYPE_U :
 505                                 printf ("[UINTPTR:%p], ", *((int **) curParm));
 506                                 break;
 507                         case MONO_TYPE_BOOLEAN :
 508                                 printf ("[BOOL:%d], ", *((int *) curParm));
 509                                 break;
 510                         case MONO_TYPE_CHAR :
 511                                 printf ("[CHAR:%c], ", *((int *) curParm));
 512                                 break;
 513                         case MONO_TYPE_I1 :
 514                                 printf ("[INT1:%d], ", *((int *) curParm));
 515                                 break;
 516                         case MONO_TYPE_I2 :
 517                                 printf ("[INT2:%d], ", *((int *) curParm));
 518                                 break;
 519                         case MONO_TYPE_I4 :
 520                                 printf ("[INT4:%d], ", *((int *) curParm));
 521                                 break;
 522                         case MONO_TYPE_U1 :
 523                                 printf ("[UINT1:%u], ", *((unsigned int *) curParm));
 524                                 break;
 525                         case MONO_TYPE_U2 :
 526                                 printf ("[UINT2:%u], ", *((guint16 *) curParm));
 527                                 break;
 528                         case MONO_TYPE_U4 :
 529                                 printf ("[UINT4:%u], ", *((guint32 *) curParm));
 530                                 break;
 531                         case MONO_TYPE_U8 :
 532                                 printf ("[UINT8:%llu], ", *((guint64 *) curParm));
 533                                 break;
 534                         case MONO_TYPE_STRING : {
 535                                 MonoString *s = *((MonoString **) curParm);
 536                                 if (s) {
 537                                         g_assert (((MonoObject *) s)->vtable->klass == mono_defaults.string_class);
 538                                         printf("[STRING:%p:%s], ", s, mono_string_to_utf8(s));
 539                                 } else {
 540                                         printf("[STRING:null], ");
 541                                 }
 542                                 break;
 543                         }
 544                         case MONO_TYPE_CLASS :
 545                         case MONO_TYPE_OBJECT : {
 546                                 MonoObject *obj = *((MonoObject **) curParm);
 547                                 MonoClass *class;
 548                                 if ((obj) && (obj->vtable)) {
 549                                         printf("[CLASS/OBJ:");
 550                                         class = obj->vtable->klass;
 551                                         printf("%p [%p] ",obj,curParm);
 552 //                                      if (class == mono_defaults.string_class) {
 553 //                                              printf("[STRING:%p:%s]",
 554 //                                                     *obj, mono_string_to_utf8 (obj));
 555 //                                      } else if (class == mono_defaults.int32_class) {
 556 //                                              printf("[INT32:%p:%d]",
 557 //                                                      obj, *(gint32 *)((char *)obj + sizeof (MonoObject)));
 558 //                                      } else
 559 //                                              printf("[%s.%s:%p]",
 560 //                                                     class->name_space, class->name, obj);
 561                                         printf("], ");
 562                                 } else {
 563                                         printf("[OBJECT:null], ");
 564                                 }
 565                                 break;
 566                         }
 567                         case MONO_TYPE_PTR :
 568                                 printf("[PTR:%p], ", *((gpointer **) (curParm)));
 569                                 break;
 570                         case MONO_TYPE_FNPTR :
 571                                 printf("[FNPTR:%p], ", *((gpointer **) (curParm)));
 572                                 break;
 573                         case MONO_TYPE_ARRAY :
 574                                 printf("[ARRAY:%p], ", *((gpointer **) (curParm)));
 575                                 break;
 576                         case MONO_TYPE_SZARRAY :
 577                                 printf("[SZARRAY:%p], ", *((gpointer **) (curParm)));
 578                                 break;
 579                         case MONO_TYPE_I8 :
 580                                 printf("[INT8:%lld], ", *((gint64 *) (curParm)));
 581                                 break;
 582                         case MONO_TYPE_R4 :
 583                                 printf("[FLOAT4:%g], ", *((double *) (curParm)));
 584                                 break;
 585                         case MONO_TYPE_R8 :
 586                                 printf("[FLOAT8:%g], ", *((double *) (curParm)));
 587                                 break;
 588                         case MONO_TYPE_VALUETYPE : {
 589                                 int i;
 590                                 MonoMarshalType *info;
 591
 592                                 if (type->data.klass->enumtype) {
 593                                         simpleType = type->data.klass->enum_basetype->type;
 594                                         printf("{VALUETYPE} - ");
 595                                         goto enum_parmtype;
 596                                 }
 597
 598                                 info = mono_marshal_load_type_info (type->data.klass);
 599
 600                                 if ((info->native_size == sizeof(float)) &&
 601                                     (info->num_fields  == 1) &&
 602                                     (info->fields[0].field->type->type == MONO_TYPE_R4)) {
 603                                                 printf("[FLOAT4:%f], ", *((float *) (curParm)));
 604                                         break;
 605                                 }
 606
 607                                 if ((info->native_size == sizeof(double)) &&
 608                                     (info->num_fields  == 1) &&
 609                                     (info->fields[0].field->type->type == MONO_TYPE_R8)) {
 610                                         printf("[FLOAT8:%g], ", *((double *) (curParm)));
 611                                         break;
 612                                 }
 613
 614                                 printf("[VALUETYPE:");
 615                                 for (i = 0; i < size; i++)
 616                                         printf("%02x,", *((guint8 *)curParm+i));
 617                                 printf("]");
 618                                 break;
 619                         }
 620                         case MONO_TYPE_TYPEDBYREF: {
 621                                 int i;
 622                                 printf("[TYPEDBYREF:");
 623                                 for (i = 0; i < size; i++)
 624                                         printf("%02x,", *((guint8 *)curParm+i));
 625                                 printf("]");
 626                                 break;
 627                         }
 628                         default :
 629                                 printf("[?? - %d], ",simpleType);
 630                 }
 631         }
 632 }
 633
 634 /*========================= End of Function ========================*/
 635
 636 static int lc = 0;
 637 /*------------------------------------------------------------------*/
 638 /*                                                                  */
 639 /* Name         - enter_method                                      */
 640 /*                                                                  */
 641 /* Function     - Perform tracing of the entry to the current       */
 642 /*                method.                                           */
 643 /*                                                                  */
 644 /*------------------------------------------------------------------*/
 645
 646 static void
 647 enter_method (MonoMethod *method, RegParm *rParm, char *sp)
 648 {
 649         int i, oParm = 0, iParm = 0;
 650         MonoObject *obj;
 651         MonoMethodSignature *sig;
 652         char *fname;
 653         guint32 ip;
 654         CallInfo *cinfo;
 655         ArgInfo *ainfo;
 656         size_data sz;
 657         void *curParm;
 658
 659         fname = mono_method_full_name (method, TRUE);
 660         indent (1);
 661         printf ("ENTER: %s(", fname);
 662         g_free (fname);
 663
 664         ip  = (*(guint32 *) (sp+S390_RET_ADDR_OFFSET)) & 0x7fffffff;
 665         printf (") ip: %p sp: %p - ", (gpointer) ip, sp);
 666
 667         if (rParm == NULL)
 668                 return;
 669
 670         sig = mono_method_signature (method);
 671
 672         cinfo = calculate_sizes (NULL, sig, &sz, sig->pinvoke);
 673
 674         if (cinfo->struct_ret) {
 675                 printf ("[STRUCTRET:%p], ", (gpointer) rParm->gr[0]);
 676                 iParm = 1;
 677         }
 678
 679         if (sig->hasthis) {
 680                 gpointer *this = (gpointer *) rParm->gr[iParm];
 681                 obj = (MonoObject *) this;
 682                 if (method->klass->valuetype) {
 683                         if (obj) {
 684                                 printf("this:[value:%p:%08x], ",
 685                                        this, *((guint32 *)(this+sizeof(MonoObject))));
 686                         } else
 687                                 printf ("this:[NULL], ");
 688                 } else {
 689                         if (obj) {
 690 //                              class = obj->vtable->klass;
 691 //                              if (class == mono_defaults.string_class) {
 692 //                                      printf ("this:[STRING:%p:%s], ",
 693 //                                              obj, mono_string_to_utf8 ((MonoString *)obj));
 694 //                              } else {
 695 //                                      printf ("this:%p[%s.%s], ",
 696 //                                              obj, class->name_space, class->name);
 697 //                              }
 698 printf("this:%p, ",obj);
 699                         } else
 700                                 printf ("this:NULL, ");
 701                 }
 702                 oParm++;
 703         }
 704
 705         for (i = 0; i < sig->param_count; ++i) {
 706                 ainfo = &cinfo->args[i + oParm];
 707                 switch (ainfo->regtype) {
 708                         case RegTypeGeneral :
 709                                 decodeParm(sig->params[i], &(rParm->gr[ainfo->reg-2]), ainfo->size);
 710                                 break;
 711                         case RegTypeFP :
 712                                 decodeParm(sig->params[i], &(rParm->fp[ainfo->reg]), ainfo->size);
 713                                 break;
 714                         case RegTypeBase :
 715                                 decodeParm(sig->params[i], sp+ainfo->offset, ainfo->size);
 716                                 break;
 717                         case RegTypeStructByVal :
 718                                 if (ainfo->reg != STK_BASE)
 719                                         curParm = &(rParm->gr[ainfo->reg-2]);
 720                                 else
 721                                         curParm = sp+ainfo->offset;
 722
 723                                 if (retFitsInReg (ainfo->vtsize))
 724                                         decodeParm(sig->params[i],
 725                                                    curParm,
 726                                                    ainfo->size);
 727                                 else
 728                                         decodeParm(sig->params[i],
 729                                                    *((char **) curParm),
 730                                                    ainfo->vtsize);
 731                                 break;
 732                         case RegTypeStructByAddr :
 733                                 if (ainfo->reg != STK_BASE)
 734                                         curParm = &(rParm->gr[ainfo->reg-2]);
 735                                 else
 736                                         curParm = sp+ainfo->offset;
 737
 738                                 decodeParm(sig->params[i],
 739                                            *((char **) curParm),
 740                                            ainfo->vtsize);
 741                                 break;
 742
 743                         default :
 744                                 printf("???, ");
 745                 }
 746         }
 747         printf("\n");
 748         g_free(cinfo);
 749 }
 750
 751 /*========================= End of Function ========================*/
 752
 753 /*------------------------------------------------------------------*/
 754 /*                                                                  */
 755 /* Name         - leave_method                                      */
 756 /*                                                                  */
 757 /* Function     -                                                   */
 758 /*                                                                  */
 759 /*------------------------------------------------------------------*/
 760
 761 static void
 762 leave_method (MonoMethod *method, ...)
 763 {
 764         MonoType *type;
 765         char *fname;
 766         guint32 ip;
 767         va_list ap;
 768
 769         va_start(ap, method);
 770
 771         fname = mono_method_full_name (method, TRUE);
 772         indent (-1);
 773         printf ("LEAVE: %s", fname);
 774         g_free (fname);
 775
 776         type = mono_method_signature (method)->ret;
 777
 778 handle_enum:
 779         switch (type->type) {
 780         case MONO_TYPE_VOID:
 781                 break;
 782         case MONO_TYPE_BOOLEAN: {
 783                 int val = va_arg (ap, int);
 784                 if (val)
 785                         printf ("[TRUE:%d]", val);
 786                 else
 787                         printf ("[FALSE]");
 788
 789                 break;
 790         }
 791         case MONO_TYPE_CHAR: {
 792                 int val = va_arg (ap, int);
 793                 printf ("[CHAR:%d]", val);
 794                 break;
 795         }
 796         case MONO_TYPE_I1: {
 797                 int val = va_arg (ap, int);
 798                 printf ("[INT1:%d]", val);
 799                 break;
 800         }
 801         case MONO_TYPE_U1: {
 802                 int val = va_arg (ap, int);
 803                 printf ("[UINT1:%d]", val);
 804                 break;
 805         }
 806         case MONO_TYPE_I2: {
 807                 int val = va_arg (ap, int);
 808                 printf ("[INT2:%d]", val);
 809                 break;
 810         }
 811         case MONO_TYPE_U2: {
 812                 int val = va_arg (ap, int);
 813                 printf ("[UINT2:%d]", val);
 814                 break;
 815         }
 816         case MONO_TYPE_I4: {
 817                 int val = va_arg (ap, int);
 818                 printf ("[INT4:%d]", val);
 819                 break;
 820         }
 821         case MONO_TYPE_U4: {
 822                 int val = va_arg (ap, int);
 823                 printf ("[UINT4:%d]", val);
 824                 break;
 825         }
 826         case MONO_TYPE_I: {
 827                 int val = va_arg (ap, int);
 828                 printf ("[INT:%d]", val);
 829                 printf("]");
 830                 break;
 831         }
 832         case MONO_TYPE_U: {
 833                 int val = va_arg (ap, int);
 834                 printf ("[UINT:%d]", val);
 835                 printf("]");
 836                 break;
 837         }
 838         case MONO_TYPE_STRING: {
 839                 MonoString *s = va_arg (ap, MonoString *);
 840 ;
 841                 if (s) {
 842                         g_assert (((MonoObject *)s)->vtable->klass == mono_defaults.string_class);
 843                         printf ("[STRING:%p:%s]", s, mono_string_to_utf8 (s));
 844                 } else
 845                         printf ("[STRING:null], ");
 846                 break;
 847         }
 848         case MONO_TYPE_CLASS:
 849         case MONO_TYPE_OBJECT: {
 850                 MonoObject *o = va_arg (ap, MonoObject *);
 851
 852 //              if ((o) && (o->vtable)) {
 853 //                      if (o->vtable->klass == mono_defaults.boolean_class) {
 854 //                              printf ("[BOOLEAN:%p:%d]", o, *((guint8 *)o + sizeof (MonoObject)));
 855 //                      } else if  (o->vtable->klass == mono_defaults.int32_class) {
 856 //                              printf ("[INT32:%p:%d]", o, *((gint32 *)((char *)o + sizeof (MonoObject))));
 857 //                      } else if  (o->vtable->klass == mono_defaults.int64_class) {
 858 //                              printf ("[INT64:%p:%lld]", o, *((gint64 *)((char *)o + sizeof (MonoObject))));
 859 //                      } else
 860 //                              printf ("[%s.%s:%p]", o->vtable->klass->name_space, o->vtable->klass->name, o);
 861 //              } else
 862                         printf ("[OBJECT:%p]", o);
 863
 864                 break;
 865         }
 866         case MONO_TYPE_PTR:
 867         case MONO_TYPE_FNPTR:
 868         case MONO_TYPE_ARRAY:
 869         case MONO_TYPE_SZARRAY: {
 870                 gpointer p = va_arg (ap, gpointer);
 871                 printf ("[result=%p]", p);
 872                 break;
 873         }
 874         case MONO_TYPE_I8: {
 875                 gint64 l =  va_arg (ap, gint64);
 876                 printf ("[LONG:%lld]", l);
 877                 break;
 878         }
 879         case MONO_TYPE_U8: {
 880                 guint64 l =  va_arg (ap, guint64);
 881                 printf ("[ULONG:%llu]", l);
 882                 break;
 883         }
 884         case MONO_TYPE_R4: {
 885                 double f;
 886                 f = va_arg (ap, double);
 887                 printf ("[FLOAT4:%g]\n", f);
 888                 break;
 889         }
 890         case MONO_TYPE_R8: {
 891                 double f = va_arg (ap, double);
 892                 printf ("[FLOAT8:%g]\n", f);
 893                 break;
 894         }
 895         case MONO_TYPE_VALUETYPE: {
 896                 MonoMarshalType *info;
 897                 if (type->data.klass->enumtype) {
 898                         type = type->data.klass->enum_basetype;
 899                         goto handle_enum;
 900                 } else {
 901                         guint8 *p = va_arg (ap, gpointer);
 902                         int j, size, align;
 903
 904                         info = mono_marshal_load_type_info (type->data.klass);
 905
 906                         if ((info->native_size == sizeof(float)) &&
 907                             (info->num_fields  == 1) &&
 908                             (info->fields[0].field->type->type == MONO_TYPE_R4)) {
 909                                 double f = va_arg (ap, double);
 910                                 printf("[FLOAT4:%g]\n", (double) f);
 911                                 break;
 912                         }
 913
 914                         if ((info->native_size == sizeof(double)) &&
 915                             (info->num_fields  == 1) &&
 916                             (info->fields[0].field->type->type == MONO_TYPE_R8)) {
 917                                 double f = va_arg (ap, double);
 918                                 printf("[FLOAT8:%g]\n", f);
 919                                 break;
 920                         }
 921
 922                         size = mono_type_size (type, &align);
 923                         switch (size) {
 924                         case 1:
 925                         case 2:
 926                         case 4:
 927                         case 8:
 928                                 printf ("[");
 929                                 for (j = 0; p && j < size; j++)
 930                                         printf ("%02x,", p [j]);
 931                                 printf ("]\n");
 932                                 break;
 933                         default:
 934                                 printf ("[VALUERET]\n");
 935                         }
 936                 }
 937                 break;
 938         }
 939         case MONO_TYPE_TYPEDBYREF: {
 940                 guint8 *p = va_arg (ap, gpointer);
 941                 int j, size, align;
 942                 size = mono_type_size (type, &align);
 943                 switch (size) {
 944                 case 1:
 945                 case 2:
 946                 case 4:
 947                 case 8:
 948                         printf ("[");
 949                         for (j = 0; p && j < size; j++)
 950                                 printf ("%02x,", p [j]);
 951                         printf ("]\n");
 952                         break;
 953                 default:
 954                         printf ("[TYPEDBYREF]\n");
 955                 }
 956         }
 957                 break;
 958         default:
 959                 printf ("(unknown return type %x)",
 960                         mono_method_signature (method)->ret->type);
 961         }
 962
 963         ip = ((gint32) __builtin_return_address (0)) & 0x7fffffff;
 964         printf (" ip: %p\n", (gpointer) ip);
 965 }
 966
 967 /*========================= End of Function ========================*/
 968
 969 /*------------------------------------------------------------------*/
 970 /*                                                                  */
 971 /* Name         - mono_arch_cpu_init                                */
 972 /*                                                                  */
 973 /* Function     - Perform CPU specific initialization to execute    */
 974 /*                managed code.                                     */
 975 /*                                                                  */
 976 /*------------------------------------------------------------------*/
 977
 978 void
 979 mono_arch_cpu_init (void)
 980 {
 981         guint mode = 1;
 982
 983         /*--------------------------------------*/
 984         /* Set default rounding mode for FP     */
 985         /*--------------------------------------*/
 986         __asm__ ("SRNM\t%0\n\t"
 987                 : : "m" (mode));
 988 }
 989
 990 /*========================= End of Function ========================*/
 991
 992
 993 /*
 994  * Initialize architecture specific code.
 995  */
 996 void
 997 mono_arch_init (void)
 998 {
 999 }
1000
1001 /*
1002  * Cleanup architecture specific code.
1003  */
1004 void
1005 mono_arch_cleanup (void)
1006 {
1007 }
1008
1009 /*------------------------------------------------------------------*/
1010 /*                                                                  */
1011 /* Name         - mono_arch_cpu_optimizazions                       */
1012 /*                                                                  */
1013 /* Function     - Returns the optimizations supported on this CPU   */
1014 /*                                                                  */
1015 /*------------------------------------------------------------------*/
1016
1017 guint32
1018 mono_arch_cpu_optimizazions (guint32 *exclude_mask)
1019 {
1020         guint32 opts = 0;
1021
1022         /*----------------------------------------------------------*/
1023         /* no s390-specific optimizations yet                       */
1024         /*----------------------------------------------------------*/
1025         *exclude_mask = MONO_OPT_INLINE|MONO_OPT_LINEARS;
1026 //      *exclude_mask = MONO_OPT_INLINE;
1027         return opts;
1028 }
1029
1030 /*========================= End of Function ========================*/
1031
1032 /*------------------------------------------------------------------*/
1033 /*                                                                  */
1034 /* Name         -                                                   */
1035 /*                                                                  */
1036 /* Function     -                                                   */
1037 /*                                                                  */
1038 /*------------------------------------------------------------------*/
1039
1040 static gboolean
1041 is_regsize_var (MonoType *t) {
1042         if (t->byref)
1043                 return TRUE;
1044         switch (mono_type_get_underlying_type (t)->type) {
1045         case MONO_TYPE_I4:
1046         case MONO_TYPE_U4:
1047         case MONO_TYPE_I:
1048         case MONO_TYPE_U:
1049         case MONO_TYPE_PTR:
1050         case MONO_TYPE_FNPTR:
1051                 return TRUE;
1052         case MONO_TYPE_OBJECT:
1053         case MONO_TYPE_STRING:
1054         case MONO_TYPE_CLASS:
1055         case MONO_TYPE_SZARRAY:
1056         case MONO_TYPE_ARRAY:
1057                 return FALSE;
1058         case MONO_TYPE_VALUETYPE:
1059                 if (t->data.klass->enumtype)
1060                         return is_regsize_var (t->data.klass->enum_basetype);
1061                 return FALSE;
1062         }
1063         return FALSE;
1064 }
1065
1066 /*========================= End of Function ========================*/
1067
1068 /*------------------------------------------------------------------*/
1069 /*                                                                  */
1070 /* Name         - mono_arch_get_allocatable_int_vars                */
1071 /*                                                                  */
1072 /* Function     -                                                   */
1073 /*                                                                  */
1074 /*------------------------------------------------------------------*/
1075
1076 GList *
1077 mono_arch_get_allocatable_int_vars (MonoCompile *cfg)
1078 {
1079         GList *vars = NULL;
1080         int i;
1081
1082         for (i = 0; i < cfg->num_varinfo; i++) {
1083                 MonoInst *ins = cfg->varinfo [i];
1084                 MonoMethodVar *vmv = MONO_VARINFO (cfg, i);
1085
1086                 /* unused vars */
1087                 if (vmv->range.first_use.abs_pos >= vmv->range.last_use.abs_pos)
1088                         continue;
1089
1090                 if (ins->flags & (MONO_INST_VOLATILE|MONO_INST_INDIRECT) ||
1091                     (ins->opcode != OP_LOCAL && ins->opcode != OP_ARG))
1092                         continue;
1093
1094                 /* we can only allocate 32 bit values */
1095                 if (is_regsize_var (ins->inst_vtype)) {
1096                         g_assert (MONO_VARINFO (cfg, i)->reg == -1);
1097                         g_assert (i == vmv->idx);
1098                         vars = mono_varlist_insert_sorted (cfg, vars, vmv, FALSE);
1099                 }
1100         }
1101
1102         return vars;
1103 }
1104
1105 /*========================= End of Function ========================*/
1106
1107 /*------------------------------------------------------------------*/
1108 /*                                                                  */
1109 /* Name         - mono_arch_global_int_regs                         */
1110 /*                                                                  */
1111 /* Function     - Return a list of usable integer registers.        */
1112 /*                                                                  */
1113 /*------------------------------------------------------------------*/
1114
1115 GList *
1116 mono_arch_get_global_int_regs (MonoCompile *cfg)
1117 {
1118         GList *regs = NULL;
1119         MonoMethodHeader *header;
1120         int i, top = 13;
1121
1122         header = mono_method_get_header (cfg->method);
1123         if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
1124                 cfg->frame_reg = s390_r11;
1125
1126         for (i = 8; i < top; ++i) {
1127                 if (cfg->frame_reg != i)
1128                         regs = g_list_prepend (regs, GUINT_TO_POINTER (i));
1129         }
1130
1131         return regs;
1132 }
1133
1134 /*========================= End of Function ========================*/
1135
1136 /*------------------------------------------------------------------*/
1137 /*                                                                  */
1138 /* Name         -  mono_arch_flush_icache                           */
1139 /*                                                                  */
1140 /* Function     -  Flush the CPU icache.                            */
1141 /*                                                                  */
1142 /*------------------------------------------------------------------*/
1143
1144 void
1145 mono_arch_flush_icache (guint8 *code, gint size)
1146 {
1147 }
1148
1149 /*========================= End of Function ========================*/
1150
1151 /*------------------------------------------------------------------*/
1152 /*                                                                  */
1153 /* Name         - add_general                                       */
1154 /*                                                                  */
1155 /* Function     - Determine code and stack size incremements for a  */
1156 /*                parameter.                                        */
1157 /*                                                                  */
1158 /*------------------------------------------------------------------*/
1159
1160 static void inline
1161 add_general (guint *gr, size_data *sz, ArgInfo *ainfo, gboolean simple)
1162 {
1163         int disp;
1164
1165         if (simple) {
1166                 if (*gr > S390_LAST_ARG_REG) {
1167                         sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1168                         ainfo->offset   = sz->stack_size;
1169                         ainfo->reg      = STK_BASE;
1170                         ainfo->regtype  = RegTypeBase;
1171                         sz->stack_size += sizeof(int);
1172                         sz->local_size += sizeof(int);
1173                         sz->offStruct  += sizeof(int);
1174                         sz->code_size  += 12;
1175                 } else {
1176                         ainfo->reg      = *gr;
1177                         sz->code_size  += 8;
1178                 }
1179         } else {
1180                 if (*gr > S390_LAST_ARG_REG - 1) {
1181                         disp            = sz->stack_size;
1182                         sz->stack_size  = S390_ALIGN(sz->stack_size, S390_STACK_ALIGNMENT);
1183                         disp            = sz->stack_size - disp;
1184                         ainfo->offset   = sz->stack_size;
1185                         ainfo->reg      = STK_BASE;
1186                         ainfo->regtype  = RegTypeBase;
1187                         sz->stack_size += sizeof(long long);
1188                         sz->local_size += (sizeof(long long) + disp);
1189                         sz->offStruct  += (sizeof(long long) + disp);
1190                         sz->code_size  += 10;
1191                 } else {
1192                         ainfo->reg      = *gr;
1193                         sz->code_size  += 8;
1194                 }
1195                 (*gr) ++;
1196         }
1197         (*gr) ++;
1198 }
1199
1200 /*========================= End of Function ========================*/
1201
1202 /*------------------------------------------------------------------*/
1203 /*                                                                  */
1204 /* Name         - add_stackParm                                     */
1205 /*                                                                  */
1206 /* Function     - Determine code and stack size incremements for a  */
1207 /*                parameter.                                        */
1208 /*                                                                  */
1209 /*------------------------------------------------------------------*/
1210
1211 static void inline
1212 add_stackParm (guint *gr, size_data *sz, ArgInfo *ainfo, gint size)
1213 {
1214         if (*gr > S390_LAST_ARG_REG) {
1215                 sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1216                 ainfo->reg      = STK_BASE;
1217                 sz->parm_size  += sizeof(gpointer);
1218                 sz->offStruct  += sizeof(gpointer);
1219         } else {
1220                 ainfo->reg      = *gr;
1221         }
1222         (*gr) ++;
1223         ainfo->offset   = sz->stack_size;
1224         ainfo->offparm  = sz->offset;
1225         sz->offset      = S390_ALIGN(sz->offset+size, sizeof(long));
1226         ainfo->size     = size;
1227         ainfo->regtype  = RegTypeStructByAddr;
1228         ainfo->vtsize   = size;
1229         sz->parm_size  += size;
1230 }
1231
1232 /*========================= End of Function ========================*/
1233
1234 /*------------------------------------------------------------------*/
1235 /*                                                                  */
1236 /* Name         - add_float                                         */
1237 /*                                                                  */
1238 /* Function     - Determine code and stack size incremements for a  */
1239 /*                float parameter.                                  */
1240 /*                                                                  */
1241 /*------------------------------------------------------------------*/
1242
1243 static void inline
1244 add_float (guint *fr,  size_data *sz, ArgInfo *ainfo)
1245 {
1246         if ((*fr) <= S390_LAST_FPARG_REG) {
1247                 ainfo->regtype = RegTypeFP;
1248                 ainfo->reg     = *fr;
1249                 sz->code_size += 4;
1250                 (*fr) += 2;
1251         }
1252         else {
1253                 ainfo->offset   = sz->stack_size;
1254                 ainfo->reg      = STK_BASE;
1255                 ainfo->regtype  = RegTypeBase;
1256                 sz->code_size  += 4;
1257                 sz->stack_size += ainfo->size;
1258                 sz->local_size += ainfo->size;
1259                 sz->offStruct  += ainfo->size;
1260         }
1261 }
1262
1263 /*========================= End of Function ========================*/
1264
1265 /*------------------------------------------------------------------*/
1266 /*                                                                  */
1267 /* Name         - calculate_sizes                                   */
1268 /*                                                                  */
1269 /* Function     - Determine the amount of space required for code   */
1270 /*                and stack. In addition determine starting points  */
1271 /*                for stack-based parameters, and area for struct-  */
1272 /*                ures being returned on the stack.                 */
1273 /*                                                                  */
1274 /*------------------------------------------------------------------*/
1275
1276 static CallInfo *
1277 calculate_sizes (MonoCompile *cfg, MonoMethodSignature *sig, size_data *sz,
1278                  gboolean string_ctor)
1279 {
1280         guint i, fr, gr, size;
1281         int nParm = sig->hasthis + sig->param_count;
1282         MonoType *ret_type;
1283         guint32 simpletype, align;
1284         CallInfo *cinfo = g_malloc0 (sizeof (CallInfo) + sizeof (ArgInfo) * nParm);
1285         MonoGenericSharingContext *gsctx = cfg ? cfg->generic_sharing_context : NULL;
1286
1287         fr                = 0;
1288         gr                = s390_r2;
1289         nParm             = 0;
1290         cinfo->struct_ret = 0;
1291         sz->offset        = 0;
1292         sz->offStruct     = S390_MINIMAL_STACK_SIZE;
1293         sz->retStruct     = 0;
1294         sz->stack_size    = S390_MINIMAL_STACK_SIZE;
1295         sz->code_size     = 0;
1296         sz->parm_size     = 0;
1297         sz->local_size    = 0;
1298
1299         /*----------------------------------------------------------*/
1300         /* We determine the size of the return code/stack in case we*/
1301         /* need to reserve a register to be used to address a stack */
1302         /* area that the callee will use.                           */
1303         /*----------------------------------------------------------*/
1304
1305         ret_type = mono_type_get_underlying_type (sig->ret);
1306         ret_type = mini_get_basic_type_from_generic (gsctx, ret_type);
1307         simpletype = ret_type->type;
1308 enum_retvalue:
1309         switch (simpletype) {
1310                 case MONO_TYPE_BOOLEAN:
1311                 case MONO_TYPE_I1:
1312                 case MONO_TYPE_U1:
1313                 case MONO_TYPE_I2:
1314                 case MONO_TYPE_U2:
1315                 case MONO_TYPE_CHAR:
1316                 case MONO_TYPE_I4:
1317                 case MONO_TYPE_U4:
1318                 case MONO_TYPE_I:
1319                 case MONO_TYPE_U:
1320                 case MONO_TYPE_CLASS:
1321                 case MONO_TYPE_OBJECT:
1322                 case MONO_TYPE_SZARRAY:
1323                 case MONO_TYPE_ARRAY:
1324                 case MONO_TYPE_PTR:
1325                 case MONO_TYPE_FNPTR:
1326                 case MONO_TYPE_STRING:
1327                         cinfo->ret.reg = s390_r2;
1328                         sz->code_size += 4;
1329                         break;
1330                 case MONO_TYPE_R4:
1331                 case MONO_TYPE_R8:
1332                         cinfo->ret.reg = s390_f0;
1333                         sz->code_size += 4;
1334                         break;
1335                 case MONO_TYPE_I8:
1336                 case MONO_TYPE_U8:
1337                         cinfo->ret.reg = s390_r2;
1338                         sz->code_size += 4;
1339                         break;
1340                 case MONO_TYPE_GENERICINST:
1341                         if (!mono_type_generic_inst_is_valuetype (sig->ret)) {
1342                                 cinfo->ret.reg = s390_r2;
1343                                 sz->code_size += 4;
1344                                 break;
1345                         }
1346                         /* Fall through */
1347                 case MONO_TYPE_VALUETYPE: {
1348                         MonoClass *klass = mono_class_from_mono_type (sig->ret);
1349                         if (klass->enumtype) {
1350                                 simpletype = klass->enum_basetype->type;
1351                                 goto enum_retvalue;
1352                         }
1353                         if (sig->pinvoke)
1354                                 size = mono_class_native_size (klass, &align);
1355                         else
1356                                 size = mono_class_value_size (klass, &align);
1357
1358                         cinfo->ret.reg    = s390_r2;
1359                         cinfo->struct_ret = 1;
1360                         cinfo->ret.size   = size;
1361                         cinfo->ret.vtsize = size;
1362                         gr++;
1363                         break;
1364                 }
1365                 case MONO_TYPE_TYPEDBYREF:
1366                         size = sizeof (MonoTypedRef);
1367                         cinfo->ret.reg    = s390_r2;
1368                         cinfo->struct_ret = 1;
1369                         cinfo->ret.size   = size;
1370                         cinfo->ret.vtsize = size;
1371                         gr++;
1372                         break;
1373                 case MONO_TYPE_VOID:
1374                         break;
1375                 default:
1376                         g_error ("mini-s390: cannot handle as return value 0x%x (0x%x)", sig->ret->type,simpletype);
1377         }
1378
1379         if (sig->hasthis) {
1380                 add_general (&gr, sz, cinfo->args+nParm, TRUE);
1381                 cinfo->args[nParm].size = sizeof(gpointer);
1382                 nParm++;
1383         }
1384
1385         /*----------------------------------------------------------*/
1386         /* We determine the size of the parameter code and stack    */
1387         /* requirements by checking the types and sizes of the      */
1388         /* parameters.                                              */
1389         /*----------------------------------------------------------*/
1390
1391         for (i = 0; i < sig->param_count; ++i) {
1392                 MonoType *ptype;
1393
1394                 /*--------------------------------------------------*/
1395                 /* Handle vararg type calls. All args are put on    */
1396                 /* the stack.                                       */
1397                 /*--------------------------------------------------*/
1398                 if ((sig->call_convention == MONO_CALL_VARARG) &&
1399                     (i == sig->sentinelpos)) {
1400                         gr = S390_LAST_ARG_REG + 1;
1401                         add_general (&gr, sz, &cinfo->sigCookie, TRUE);
1402                 }
1403
1404                 if (sig->params [i]->byref) {
1405                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1406                         cinfo->args[nParm].size = sizeof(gpointer);
1407                         nParm++;
1408                         continue;
1409                 }
1410
1411                 ptype = mono_type_get_underlying_type (sig->params [i]);
1412                 ptype = mini_get_basic_type_from_generic (gsctx, ptype);
1413                 simpletype = ptype->type;
1414                 switch (simpletype) {
1415                 case MONO_TYPE_BOOLEAN:
1416                 case MONO_TYPE_I1:
1417                 case MONO_TYPE_U1:
1418                         cinfo->args[nParm].size = sizeof(char);
1419                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1420                         nParm++;
1421                         break;
1422                 case MONO_TYPE_I2:
1423                 case MONO_TYPE_U2:
1424                 case MONO_TYPE_CHAR:
1425                         cinfo->args[nParm].size = sizeof(short);
1426                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1427                         nParm++;
1428                         break;
1429                 case MONO_TYPE_I4:
1430                 case MONO_TYPE_U4:
1431                         cinfo->args[nParm].size = sizeof(int);
1432                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1433                         nParm++;
1434                         break;
1435                 case MONO_TYPE_I:
1436                 case MONO_TYPE_U:
1437                 case MONO_TYPE_PTR:
1438                 case MONO_TYPE_FNPTR:
1439                 case MONO_TYPE_CLASS:
1440                 case MONO_TYPE_OBJECT:
1441                 case MONO_TYPE_STRING:
1442                 case MONO_TYPE_SZARRAY:
1443                 case MONO_TYPE_ARRAY:
1444                         cinfo->args[nParm].size = sizeof(gpointer);
1445                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1446                         nParm++;
1447                         break;
1448                 case MONO_TYPE_I8:
1449                 case MONO_TYPE_U8:
1450                         cinfo->args[nParm].size = sizeof(long long);
1451                         add_general (&gr, sz, cinfo->args+nParm, FALSE);
1452                         nParm++;
1453                         break;
1454                 case MONO_TYPE_R4:
1455                         cinfo->args[nParm].size = sizeof(float);
1456                         add_float (&fr, sz, cinfo->args+nParm);
1457                         nParm++;
1458                         break;
1459                 case MONO_TYPE_R8:
1460                         cinfo->args[nParm].size = sizeof(double);
1461                         add_float (&fr, sz, cinfo->args+nParm);
1462                         nParm++;
1463                         break;
1464                 case MONO_TYPE_GENERICINST:
1465                         if (!mono_type_generic_inst_is_valuetype (sig->params [i])) {
1466                                 cinfo->args[nParm].size = sizeof(gpointer);
1467                                 add_general (&gr, sz, cinfo->args+nParm, TRUE);
1468                                 nParm++;
1469                                 break;
1470                         }
1471                         /* Fall through */
1472                 case MONO_TYPE_VALUETYPE: {
1473                         MonoMarshalType *info;
1474                         MonoClass *klass = mono_class_from_mono_type (sig->params [i]);
1475                         if (sig->pinvoke)
1476                                 size = mono_class_native_size (klass, &align);
1477                         else
1478                                 size = mono_class_value_size (klass, &align);
1479
1480                         info = mono_marshal_load_type_info (klass);
1481
1482                         if ((info->native_size == sizeof(float)) &&
1483                             (info->num_fields  == 1) &&
1484                             (info->fields[0].field->type->type == MONO_TYPE_R4)) {
1485                                 cinfo->args[nParm].size = sizeof(float);
1486                                 add_float(&fr, sz, cinfo->args+nParm);
1487                                 break;
1488                         }
1489
1490                         if ((info->native_size == sizeof(double)) &&
1491                             (info->num_fields  == 1) &&
1492                             (info->fields[0].field->type->type == MONO_TYPE_R8)) {
1493                                 cinfo->args[nParm].size = sizeof(double);
1494                                 add_float(&fr, sz, cinfo->args+nParm);
1495                                 break;
1496                         }
1497
1498                         cinfo->args[nParm].vtsize  = 0;
1499                         cinfo->args[nParm].size    = 0;
1500
1501                         switch (size) {
1502                                 /*----------------------------------*/
1503                                 /* On S/390, structures of size 1,  */
1504                                 /* 2, 4, and 8 bytes are passed in  */
1505                                 /* (a) register(s).                 */
1506                                 /*----------------------------------*/
1507                                 case 0:
1508                                 case 1:
1509                                 case 2:
1510                                 case 4:
1511                                         add_general(&gr, sz, cinfo->args+nParm, TRUE);
1512                                         cinfo->args[nParm].size    = size;
1513                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1514                                         nParm++;
1515                                         sz->local_size            += sizeof(long);
1516                                         break;
1517                                 case 8:
1518                                         add_general(&gr, sz, cinfo->args+nParm, FALSE);
1519                                         cinfo->args[nParm].size    = sizeof(long long);
1520                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1521                                         nParm++;
1522                                         sz->local_size            += sizeof(long long);
1523                                         break;
1524                                 default:
1525                                         add_stackParm(&gr, sz, cinfo->args+nParm, size);
1526                                         nParm++;
1527                         }
1528                 }
1529                         break;
1530                 case MONO_TYPE_TYPEDBYREF: {
1531                         int size = sizeof (MonoTypedRef);
1532
1533                         cinfo->args[nParm].vtsize  = 0;
1534                         cinfo->args[nParm].size    = 0;
1535
1536                         switch (size) {
1537                                 /*----------------------------------*/
1538                                 /* On S/390, structures of size 1,  */
1539                                 /* 2, 4, and 8 bytes are passed in  */
1540                                 /* (a) register(s).                 */
1541                                 /*----------------------------------*/
1542                                 case 0:
1543                                 case 1:
1544                                 case 2:
1545                                 case 4:
1546                                         add_general(&gr, sz, cinfo->args+nParm, TRUE);
1547                                         cinfo->args[nParm].size    = size;
1548                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1549                                         nParm++;
1550                                         sz->local_size            += sizeof(long);
1551                                         break;
1552                                 case 8:
1553                                         add_general(&gr, sz, cinfo->args+nParm, FALSE);
1554                                         cinfo->args[nParm].size    = sizeof(long long);
1555                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1556                                         nParm++;
1557                                         sz->local_size            += sizeof(long long);
1558                                         break;
1559                                 default:
1560                                         add_stackParm(&gr, sz, cinfo->args+nParm, size);
1561                                         nParm++;
1562                         }
1563                 }
1564                         break;
1565                 default:
1566                         g_error ("Can't trampoline 0x%x", sig->params [i]->type);
1567                 }
1568         }
1569
1570         /*----------------------------------------------------------*/
1571         /* If we are passing a structure back then if it won't be   */
1572         /* in a register(s) then we make room at the end of the     */
1573         /* parameters that may have been placed on the stack        */
1574         /*----------------------------------------------------------*/
1575         if (cinfo->struct_ret) {
1576                 cinfo->ret.offset = sz->stack_size;
1577                 switch (cinfo->ret.size) {
1578                 case 0:
1579                 case 1:
1580                 case 2:
1581                 case 4:
1582                 case 8:
1583                         break;
1584                 default:
1585                         sz->stack_size   += S390_ALIGN(cinfo->ret.size, align);
1586                 }
1587         }
1588
1589         /*----------------------------------------------------------*/
1590         /* Handle the case where there are no implicit arguments    */
1591         /*----------------------------------------------------------*/
1592         if ((sig->call_convention == MONO_CALL_VARARG) &&
1593             (sig->param_count == sig->sentinelpos)) {
1594                 gr = S390_LAST_ARG_REG + 1;
1595                 add_general (&gr, sz, &cinfo->sigCookie, TRUE);
1596         }
1597
1598         cinfo->lastgr   = gr;
1599         sz->stack_size  = sz->stack_size + sz->local_size + sz->parm_size +
1600                           sz->offset;
1601         sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1602
1603         return (cinfo);
1604 }
1605
1606 /*========================= End of Function ========================*/
1607
1608 /*------------------------------------------------------------------*/
1609 /*                                                                  */
1610 /* Name         - mono_arch_allocate_vars                           */
1611 /*                                                                  */
1612 /* Function     - Set var information according to the calling      */
1613 /*                convention for S/390. The local var stuff should  */
1614 /*                most likely be split in another method.           */
1615 /*                                                                  */
1616 /* Parameter    - @m - Compile unit.                                */
1617 /*                                                                  */
1618 /*------------------------------------------------------------------*/
1619
1620 void
1621 mono_arch_allocate_vars (MonoCompile *cfg)
1622 {
1623         MonoMethodSignature *sig;
1624         MonoMethodHeader *header;
1625         MonoInst *inst;
1626         CallInfo *cinfo;
1627         size_data sz;
1628         int iParm, iVar, offset, size, align, curinst;
1629         int frame_reg = STK_BASE;
1630         int sArg, eArg;
1631
1632         header  = mono_method_get_header (cfg->method);
1633
1634         cfg->flags |= MONO_CFG_HAS_SPILLUP;
1635
1636         /*---------------------------------------------------------*/
1637         /* We use the frame register also for any method that has  */
1638         /* filter clauses. This way, when the handlers are called, */
1639         /* the code will reference local variables using the frame */
1640         /* reg instead of the stack pointer: if we had to restore  */
1641         /* the stack pointer, we'd corrupt the method frames that  */
1642         /* are already on the stack (since filters get called      */
1643         /* before stack unwinding happens) when the filter code    */
1644         /* would call any method.                                  */
1645         /*---------------------------------------------------------*/
1646         if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
1647                 frame_reg = s390_r11;
1648
1649         cfg->frame_reg = frame_reg;
1650
1651         if (frame_reg != STK_BASE)
1652                 cfg->used_int_regs |= 1 << frame_reg;
1653
1654         sig     = mono_method_signature (cfg->method);
1655
1656         cinfo   = calculate_sizes (cfg, sig, &sz, sig->pinvoke);
1657
1658         if (cinfo->struct_ret) {
1659                 cfg->ret->opcode = OP_REGVAR;
1660                 cfg->ret->inst_c0 = s390_r2;
1661         } else {
1662                 switch (mono_type_get_underlying_type (sig->ret)->type) {
1663                 case MONO_TYPE_VOID:
1664                         break;
1665                 default:
1666                         cfg->ret->opcode = OP_REGVAR;
1667                         cfg->ret->dreg   = s390_r2;
1668                         break;
1669                 }
1670         }
1671
1672         /*--------------------------------------------------------------*/
1673         /* local vars are at a positive offset from the stack pointer   */
1674         /* also note that if the function uses alloca, we use s390_r11  */
1675         /* to point at the local variables.                             */
1676         /* add parameter area size for called functions                 */
1677         /*--------------------------------------------------------------*/
1678         offset          = (cfg->param_area + S390_MINIMAL_STACK_SIZE);
1679         cfg->sig_cookie = 0;
1680
1681         if (cinfo->struct_ret) {
1682                 inst               = cfg->ret;
1683                 offset             = S390_ALIGN(offset, sizeof(gpointer));
1684                 inst->inst_offset  = offset;
1685                 inst->opcode       = OP_REGOFFSET;
1686                 inst->inst_basereg = frame_reg;
1687                 offset            += sizeof(gpointer);
1688                 if ((sig->call_convention == MONO_CALL_VARARG) &&
1689                     (!retFitsInReg (cinfo->ret.size)))
1690                         cfg->sig_cookie += cinfo->ret.size;
1691         }
1692
1693         if (sig->hasthis) {
1694                 inst = cfg->args [0];
1695                 if (inst->opcode != OP_REGVAR) {
1696                         inst->opcode       = OP_REGOFFSET;
1697                         inst->inst_basereg = frame_reg;
1698                         offset             = S390_ALIGN(offset, sizeof(gpointer));
1699                         inst->inst_offset  = offset;
1700                         offset            += sizeof (gpointer);
1701                 }
1702                 curinst = sArg = 1;
1703         } else {
1704                 curinst = sArg = 0;
1705         }
1706
1707         eArg = sig->param_count + sArg;
1708
1709         if (sig->call_convention == MONO_CALL_VARARG)
1710                 cfg->sig_cookie += S390_MINIMAL_STACK_SIZE;
1711
1712         for (iParm = sArg; iParm < eArg; ++iParm) {
1713                 inst = cfg->args [curinst];
1714                 if (inst->opcode != OP_REGVAR) {
1715                         switch (cinfo->args[iParm].regtype) {
1716                                 case RegTypeStructByAddr :
1717                                 if (cinfo->args[iParm].reg == STK_BASE) {
1718                                         inst->opcode       = OP_S390_LOADARG;
1719                                         inst->inst_basereg = frame_reg;
1720                                         size               = abs(cinfo->args[iParm].vtsize);
1721                                         offset             = S390_ALIGN(offset, sizeof(long));
1722                                         inst->inst_offset  = offset;
1723                                         inst->backend.arg_info       = cinfo->args[iParm].offset;
1724                                 } else {
1725                                         inst->opcode       = OP_S390_ARGREG;
1726                                         inst->inst_basereg = frame_reg;
1727                                         size               = sizeof(gpointer);
1728                                         offset             = S390_ALIGN(offset, size);
1729                                         inst->inst_offset  = offset;
1730                                         inst->backend.arg_info       = cinfo->args[iParm].offset;
1731                                 }
1732                                         break;
1733                                 case RegTypeStructByVal :
1734                                         inst->opcode       = OP_S390_ARGPTR;
1735                                         inst->inst_basereg = frame_reg;
1736                                         size               = cinfo->args[iParm].size;
1737                                         offset             = S390_ALIGN(offset, size);
1738                                         inst->inst_offset  = offset;
1739                                         inst->backend.arg_info       = cinfo->args[iParm].offset;
1740                                         break;
1741                                 default :
1742                                 if (cinfo->args[iParm].reg != STK_BASE) {
1743                                         inst->opcode       = OP_REGOFFSET;
1744                                         inst->inst_basereg = frame_reg;
1745                                         size               = (cinfo->args[iParm].size < 8
1746                                                               ? sizeof(long)
1747                                                               : sizeof(long long));
1748                                         offset             = S390_ALIGN(offset, size);
1749                                         inst->inst_offset  = offset;
1750                                 } else {
1751                                         inst->opcode       = OP_S390_STKARG;
1752                                         inst->inst_basereg = frame_reg;
1753                                         size               = (cinfo->args[iParm].size < 4
1754                                                               ? 4 - cinfo->args[iParm].size
1755                                                               : 0);
1756                                         inst->inst_offset  = cinfo->args[iParm].offset +
1757                                                              size;
1758                                         inst->backend.arg_info       = 0;
1759                                         size               = sizeof(long);
1760                                 }
1761                         }
1762                         if ((sig->call_convention == MONO_CALL_VARARG) &&
1763                             (cinfo->args[iParm].regtype != RegTypeGeneral) &&
1764                             (iParm < sig->sentinelpos))
1765                                 cfg->sig_cookie += size;
1766
1767                         offset += size;
1768                 }
1769                 curinst++;
1770         }
1771
1772         curinst = cfg->locals_start;
1773         for (iVar = curinst; iVar < cfg->num_varinfo; ++iVar) {
1774                 inst = cfg->varinfo [iVar];
1775                 if ((inst->flags & MONO_INST_IS_DEAD) ||
1776                     (inst->opcode == OP_REGVAR))
1777                         continue;
1778
1779                 /*--------------------------------------------------*/
1780                 /* inst->backend.is_pinvoke indicates native sized value types, */
1781                 /* this is used by the pinvoke wrappers when they   */
1782                 /* call functions returning structure               */
1783                 /*--------------------------------------------------*/
1784                 if (inst->backend.is_pinvoke && MONO_TYPE_ISSTRUCT (inst->inst_vtype))
1785                         size = mono_class_native_size (mono_class_from_mono_type(inst->inst_vtype), &align);
1786                 else
1787                         size = mono_type_size (inst->inst_vtype, &align);
1788
1789                 offset             = S390_ALIGN(offset, align);
1790                 inst->inst_offset  = offset;
1791                 inst->opcode       = OP_REGOFFSET;
1792                 inst->inst_basereg = frame_reg;
1793                 offset            += size;
1794                 DEBUG (g_print("allocating local %d to %ld\n", iVar, inst->inst_offset));
1795         }
1796
1797         /*------------------------------------------------------*/
1798         /* Allow space for the trace method stack area if needed*/
1799         /*------------------------------------------------------*/
1800         if (mono_jit_trace_calls != NULL && mono_trace_eval (cfg->method)) {
1801                 offset += S390_TRACE_STACK_SIZE;
1802         }
1803
1804         /*------------------------------------------------------*/
1805         /* Reserve space to save LMF and caller saved registers */
1806         /*------------------------------------------------------*/
1807         if (cfg->method->save_lmf)
1808                 offset += sizeof (MonoLMF);
1809
1810         /*------------------------------------------------------*/
1811         /* align the offset                                     */
1812         /*------------------------------------------------------*/
1813         cfg->stack_offset = S390_ALIGN(offset, S390_STACK_ALIGNMENT);
1814
1815 }
1816
1817 /*========================= End of Function ========================*/
1818
1819 /*------------------------------------------------------------------*/
1820 /*                                                                  */
1821 /* Name         - mono_arch_call_opcode                             */
1822 /*                                                                  */
1823 /* Function     - Take the arguments and generate the arch-specific */
1824 /*                instructions to properly call the function. This  */
1825 /*                includes pushing, moving argments to the correct  */
1826 /*                etc.                                              */
1827 /*                                                                  */
1828 /*------------------------------------------------------------------*/
1829
1830 MonoCallInst*
1831 mono_arch_call_opcode (MonoCompile *cfg, MonoBasicBlock* bb,
1832                        MonoCallInst *call, int is_virtual) {
1833         MonoInst *in;
1834         MonoCallArgParm *arg;
1835         MonoMethodSignature *sig;
1836         int i, n, lParamArea;
1837         CallInfo *cinfo;
1838         ArgInfo *ainfo = NULL;
1839         size_data sz;
1840         int stackSize;
1841
1842         sig = call->signature;
1843         n = sig->param_count + sig->hasthis;
1844         DEBUG (g_print ("Call requires: %d parameters\n",n));
1845
1846         cinfo = calculate_sizes (cfg, sig, &sz, sig->pinvoke);
1847
1848         stackSize         = sz.stack_size + sz.local_size + sz.parm_size + sz.offset;
1849         call->stack_usage = MAX(stackSize, call->stack_usage);
1850         lParamArea        = MAX((call->stack_usage-S390_MINIMAL_STACK_SIZE-sz.parm_size), 0);
1851         cfg->param_area   = MAX(((signed) cfg->param_area), lParamArea);
1852         cfg->flags       |= MONO_CFG_HAS_CALLS;
1853
1854         if (cinfo->struct_ret)
1855                 call->used_iregs |= 1 << cinfo->ret.reg;
1856
1857         for (i = 0; i < n; ++i) {
1858                 ainfo = cinfo->args + i;
1859
1860                 if ((sig->call_convention == MONO_CALL_VARARG) &&
1861                     (i == sig->sentinelpos)) {
1862                         emit_sig_cookie (cfg, call, cinfo, ainfo->size);
1863                 }
1864
1865                 if (is_virtual && i == 0) {
1866                         /* the argument will be attached to the call instrucion */
1867                         in = call->args [i];
1868                         call->used_iregs |= 1 << ainfo->reg;
1869                 } else {
1870                         MONO_INST_NEW_CALL_ARG (cfg, arg, OP_OUTARG);
1871                         in                  = call->args [i];
1872                         arg->ins.cil_code   = in->cil_code;
1873                         arg->ins.inst_left  = in;
1874                         arg->ins.type       = in->type;
1875                         MONO_INST_LIST_ADD_TAIL (&arg->ins.node, &call->out_args);
1876                         arg->ins.inst_right = (MonoInst *) call;
1877                         if (ainfo->regtype == RegTypeGeneral) {
1878                                 arg->ins.backend.reg3   = ainfo->reg;
1879                                 call->used_iregs |= 1 << ainfo->reg;
1880                                 if (arg->ins.type == STACK_I8)
1881                                         call->used_iregs |= 1 << (ainfo->reg + 1);
1882                         } else if (ainfo->regtype == RegTypeStructByAddr) {
1883                                 call->used_iregs |= 1 << ainfo->reg;
1884                                 arg->ins.sreg1    = ainfo->reg;
1885                                 arg->ins.opcode   = OP_OUTARG_VT;
1886                                 arg->size         = -ainfo->vtsize;
1887                                 arg->offset       = ainfo->offset;
1888                                 arg->offPrm       = ainfo->offparm + sz.offStruct;
1889                         } else if (ainfo->regtype == RegTypeStructByVal) {
1890                                 if (ainfo->reg != STK_BASE) {
1891                                         switch (ainfo->size) {
1892                                         case 0:
1893                                         case 1:
1894                                         case 2:
1895                                         case 4:
1896                                                 call->used_iregs |= 1 << ainfo->reg;
1897                                                 break;
1898                                         case 8:
1899                                                 call->used_iregs |= 1 << ainfo->reg;
1900                                                 call->used_iregs |= 1 << (ainfo->reg+1);
1901                                                 break;
1902                                         default:
1903                                                 call->used_iregs |= 1 << ainfo->reg;
1904                                         }
1905                                 }
1906                                 arg->ins.sreg1  = ainfo->reg;
1907                                 arg->ins.opcode = OP_OUTARG_VT;
1908                                 arg->size       = ainfo->size;
1909                                 arg->offset     = ainfo->offset;
1910                                 arg->offPrm     = ainfo->offparm + sz.offStruct;
1911                         } else if (ainfo->regtype == RegTypeBase) {
1912                                 arg->ins.opcode   = OP_OUTARG_MEMBASE;
1913                                 arg->ins.sreg1    = ainfo->reg;
1914                                 arg->size         = ainfo->size;
1915                                 arg->offset       = ainfo->offset;
1916                                 call->used_iregs |= 1 << ainfo->reg;
1917                         } else if (ainfo->regtype == RegTypeFP) {
1918                                 arg->ins.backend.reg3   = ainfo->reg;
1919                                 call->used_fregs |= 1 << ainfo->reg;
1920                                 if (ainfo->size == 4)
1921                                         arg->ins.opcode = OP_OUTARG_R4;
1922                                 else
1923                                         arg->ins.opcode = OP_OUTARG_R8;
1924                         } else {
1925                                 g_assert_not_reached ();
1926                         }
1927                 }
1928         }
1929
1930         /*
1931          * Handle the case where there are no implicit arguments
1932          */
1933         if ((sig->call_convention == MONO_CALL_VARARG) &&
1934             (i == sig->sentinelpos)) {
1935                 emit_sig_cookie (cfg, call, cinfo, ainfo->size);
1936         }
1937
1938         g_free (cinfo);
1939         return call;
1940 }
1941
1942 /*========================= End of Function ========================*/
1943
1944 /*------------------------------------------------------------------*/
1945 /*                                                                  */
1946 /* Name         - emit_sig_cookie.                                  */
1947 /*                                                                  */
1948 /* Function     - For variable length parameter lists construct a   */
1949 /*                signature cookie and emit it.                     */
1950 /*                                                                  */
1951 /*------------------------------------------------------------------*/
1952
1953 static void
1954 emit_sig_cookie (MonoCompile *cfg, MonoCallInst *call,
1955                  CallInfo *cinfo, int argSize)
1956 {
1957         MonoCallArgParm *arg;
1958         MonoMethodSignature *tmpSig;
1959         MonoInst *sigArg;
1960
1961         cfg->disable_aot = TRUE;
1962
1963         /*----------------------------------------------------------*/
1964         /* mono_ArgIterator_Setup assumes the signature cookie is   */
1965         /* passed first and all the arguments which were before it  */
1966         /* passed on the stack after the signature. So compensate   */
1967         /* by passing a different signature.                        */
1968         /*----------------------------------------------------------*/
1969         tmpSig = mono_metadata_signature_dup (call->signature);
1970         tmpSig->param_count -= call->signature->sentinelpos;
1971         tmpSig->sentinelpos  = 0;
1972         if (tmpSig->param_count > 0)
1973                 memcpy (tmpSig->params,
1974                         call->signature->params + call->signature->sentinelpos,
1975                         tmpSig->param_count * sizeof(MonoType *));
1976
1977         MONO_INST_NEW (cfg, sigArg, OP_ICONST);
1978         sigArg->inst_p0 = tmpSig;
1979
1980         MONO_INST_NEW_CALL_ARG (cfg, arg, OP_OUTARG_MEMBASE);
1981         arg->ins.inst_left   = sigArg;
1982         arg->ins.inst_right  = (MonoInst *) call;
1983         arg->size            = argSize;
1984         arg->offset          = cinfo->sigCookie.offset;
1985         MONO_INST_LIST_ADD_TAIL (&arg->ins.node, &call->out_args);
1986 }
1987
1988 /*========================= End of Function ========================*/
1989
1990 /*------------------------------------------------------------------*/
1991 /*                                                                  */
1992 /* Name         - mono_arch_instrument_mem_needs                    */
1993 /*                                                                  */
1994 /* Function     - Allow tracing to work with this interface (with   */
1995 /*                an optional argument).                            */
1996 /*                                                                  */
1997 /*------------------------------------------------------------------*/
1998
1999 void
2000 mono_arch_instrument_mem_needs (MonoMethod *method, int *stack, int *code)
2001 {
2002         /* no stack room needed now (may be needed for FASTCALL-trace support) */
2003         *stack = 0;
2004         /* split prolog-epilog requirements? */
2005         *code = 50; /* max bytes needed: check this number */
2006 }
2007
2008 /*========================= End of Function ========================*/
2009
2010 /*------------------------------------------------------------------*/
2011 /*                                                                  */
2012 /* Name         - mono_arch_instrument_prolog                       */
2013 /*                                                                  */
2014 /* Function     - Create an "instrumented" prolog.                  */
2015 /*                                                                  */
2016 /*------------------------------------------------------------------*/
2017
2018 void*
2019 mono_arch_instrument_prolog (MonoCompile *cfg, void *func, void *p,
2020                              gboolean enable_arguments)
2021 {
2022         guchar  *code = p;
2023         int     parmOffset,
2024                 fpOffset,
2025                 baseReg;
2026
2027         parmOffset = cfg->stack_usage - S390_TRACE_STACK_SIZE;
2028         if (cfg->method->save_lmf)
2029                 parmOffset -= sizeof(MonoLMF);
2030         fpOffset   = parmOffset + (5*sizeof(gint32));
2031         if (fpOffset > 4096) {
2032                 s390_lr (code, s390_r12, STK_BASE);
2033                 baseReg = s390_r12;
2034                 while (fpOffset > 4096) {
2035                         s390_ahi (code, baseReg, 4096);
2036                         fpOffset   -= 4096;
2037                         parmOffset -= 4096;
2038                 }
2039         } else {
2040                 baseReg = STK_BASE;
2041         }
2042
2043         s390_stm  (code, s390_r2, s390_r6, baseReg, parmOffset);
2044         s390_std  (code, s390_f0, 0, baseReg, fpOffset);
2045         s390_std  (code, s390_f1, 0, baseReg, fpOffset+sizeof(gdouble));
2046         s390_std  (code, s390_f2, 0, baseReg, fpOffset+2*sizeof(gdouble));
2047         s390_basr (code, s390_r13, 0);
2048         s390_j    (code, 6);
2049         s390_word (code, cfg->method);
2050         s390_word (code, func);
2051         s390_l    (code, s390_r2, 0, s390_r13, 4);
2052         s390_la   (code, s390_r3, 0, baseReg, parmOffset);
2053         s390_lr   (code, s390_r4, STK_BASE);
2054         s390_ahi  (code, s390_r4, cfg->stack_usage);
2055         s390_l    (code, s390_r1, 0, s390_r13, 8);
2056         s390_basr (code, s390_r14, s390_r1);
2057         s390_ld   (code, s390_f2, 0, baseReg, fpOffset+2*sizeof(gdouble));
2058         s390_ld   (code, s390_f1, 0, baseReg, fpOffset+sizeof(gdouble));
2059         s390_ld   (code, s390_f0, 0, baseReg, fpOffset);
2060         s390_lm   (code, s390_r2, s390_r6, baseReg, parmOffset);
2061
2062         return code;
2063 }
2064
2065 /*========================= End of Function ========================*/
2066
2067 /*------------------------------------------------------------------*/
2068 /*                                                                  */
2069 /* Name         - mono_arch_instrument_epilog                       */
2070 /*                                                                  */
2071 /* Function     - Create an epilog that will handle the returned    */
2072 /*                values used in instrumentation.                   */
2073 /*                                                                  */
2074 /*------------------------------------------------------------------*/
2075
2076 void*
2077 mono_arch_instrument_epilog (MonoCompile *cfg, void *func, void *p, gboolean enable_arguments)
2078 {
2079         guchar     *code = p;
2080         int        save_mode = SAVE_NONE,
2081                    saveOffset;
2082         MonoMethod *method = cfg->method;
2083         int        rtype = mono_type_get_underlying_type (mono_method_signature (method)->ret)->type;
2084
2085         saveOffset = cfg->stack_usage - S390_TRACE_STACK_SIZE;
2086         if (method->save_lmf)
2087                 saveOffset -= sizeof(MonoLMF);
2088
2089 handle_enum:
2090         switch (rtype) {
2091         case MONO_TYPE_VOID:
2092                 /* special case string .ctor icall */
2093                 if (strcmp (".ctor", method->name) && method->klass == mono_defaults.string_class)
2094                         save_mode = SAVE_ONE;
2095                 else
2096                         save_mode = SAVE_NONE;
2097                 break;
2098         case MONO_TYPE_I8:
2099         case MONO_TYPE_U8:
2100                 save_mode = SAVE_TWO;
2101                 break;
2102         case MONO_TYPE_R4:
2103                 save_mode = SAVE_R4;
2104                 break;
2105         case MONO_TYPE_R8:
2106                 save_mode = SAVE_R8;
2107                 break;
2108         case MONO_TYPE_VALUETYPE:
2109                 if (mono_method_signature (method)->ret->data.klass->enumtype) {
2110                         rtype = mono_method_signature (method)->ret->data.klass->enum_basetype->type;
2111                         goto handle_enum;
2112                 }
2113                 save_mode = SAVE_STRUCT;
2114                 break;
2115         default:
2116                 save_mode = SAVE_ONE;
2117                 break;
2118         }
2119
2120         switch (save_mode) {
2121         case SAVE_TWO:
2122                 s390_stm (code, s390_r2, s390_r3, cfg->frame_reg, saveOffset);
2123                 if (enable_arguments) {
2124                         s390_lr (code, s390_r4, s390_r3);
2125                         s390_lr (code, s390_r3, s390_r2);
2126                 }
2127                 break;
2128         case SAVE_ONE:
2129                 s390_st (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2130                 if (enable_arguments) {
2131                         s390_lr (code, s390_r3, s390_r2);
2132                 }
2133                 break;
2134         case SAVE_R4:
2135                 s390_std (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2136                 if (enable_arguments) {
2137                         s390_ldebr (code, s390_f0, s390_f0);
2138                 }
2139                 break;
2140         case SAVE_R8:
2141                 s390_std (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2142                 break;
2143         case SAVE_STRUCT:
2144                 s390_st (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2145                 if (enable_arguments) {
2146                         s390_l (code, s390_r3, 0, cfg->frame_reg,
2147                                 S390_MINIMAL_STACK_SIZE+cfg->param_area);
2148                 }
2149                 break;
2150         case SAVE_NONE:
2151         default:
2152                 break;
2153         }
2154
2155         s390_basr (code, s390_r13, 0);
2156         s390_j    (code, 6);
2157         s390_word (code, cfg->method);
2158         s390_word (code, func);
2159         s390_l    (code, s390_r2, 0, s390_r13, 4);
2160         s390_l    (code, s390_r1, 0, s390_r13, 8);
2161         s390_basr (code, s390_r14, s390_r1);
2162
2163         switch (save_mode) {
2164         case SAVE_TWO:
2165                 s390_lm  (code, s390_r2, s390_r3, cfg->frame_reg, saveOffset);
2166                 break;
2167         case SAVE_ONE:
2168                 s390_l   (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2169                 break;
2170         case SAVE_R4:
2171         case SAVE_R8:
2172                 s390_ld  (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2173                 break;
2174         case SAVE_STRUCT:
2175                 s390_l   (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2176                 break;
2177         case SAVE_NONE:
2178         default:
2179                 break;
2180         }
2181
2182         return code;
2183 }
2184
2185 /*========================= End of Function ========================*/
2186
2187 /*------------------------------------------------------------------*/
2188 /*                                                                  */
2189 /* Name         - peephole_pass                                     */
2190 /*                                                                  */
2191 /* Function     - Form a peephole pass at the code looking for      */
2192 /*                simple optimizations.                             */
2193 /*                                                                  */
2194 /*------------------------------------------------------------------*/
2195
2196 static void
2197 peephole_pass (MonoCompile *cfg, MonoBasicBlock *bb)
2198 {
2199         MonoInst *ins, *n;
2200
2201         MONO_INST_LIST_FOR_EACH_ENTRY_SAFE (ins, n, &bb->ins_list, node) {
2202                 MonoInst *last_ins = mono_inst_list_prev (&ins->node, &bb->ins_list);
2203                 switch (ins->opcode) {
2204                 case OP_MUL_IMM:
2205                         /* remove unnecessary multiplication with 1 */
2206                         if (ins->inst_imm == 1) {
2207                                 if (ins->dreg != ins->sreg1) {
2208                                         ins->opcode = OP_MOVE;
2209                                 } else {
2210                                         MONO_DEL_INS (ins);
2211                                         continue;
2212                                 }
2213                         }
2214                         break;
2215                 case OP_LOAD_MEMBASE:
2216                 case OP_LOADI4_MEMBASE:
2217                         /*
2218                          * OP_STORE_MEMBASE_REG reg, offset(basereg)
2219                          * OP_LOAD_MEMBASE offset(basereg), reg
2220                          */
2221                         if (last_ins && (last_ins->opcode == OP_STOREI4_MEMBASE_REG
2222                                          || last_ins->opcode == OP_STORE_MEMBASE_REG) &&
2223                             ins->inst_basereg == last_ins->inst_destbasereg &&
2224                             ins->inst_offset == last_ins->inst_offset) {
2225                                 if (ins->dreg == last_ins->sreg1) {
2226                                         MONO_DEL_INS (ins);
2227                                         continue;
2228                                 } else {
2229                                         ins->opcode = OP_MOVE;
2230                                         ins->sreg1 = last_ins->sreg1;
2231                                 }
2232
2233                         /*
2234                          * Note: reg1 must be different from the basereg in the second load
2235                          * OP_LOAD_MEMBASE offset(basereg), reg1
2236                          * OP_LOAD_MEMBASE offset(basereg), reg2
2237                          * -->
2238                          * OP_LOAD_MEMBASE offset(basereg), reg1
2239                          * OP_MOVE reg1, reg2
2240                          */
2241                         } if (last_ins && (last_ins->opcode == OP_LOADI4_MEMBASE
2242                                            || last_ins->opcode == OP_LOAD_MEMBASE) &&
2243                               ins->inst_basereg != last_ins->dreg &&
2244                               ins->inst_basereg == last_ins->inst_basereg &&
2245                               ins->inst_offset == last_ins->inst_offset) {
2246
2247                                 if (ins->dreg == last_ins->dreg) {
2248                                         MONO_DEL_INS (ins);
2249                                         continue;
2250                                 } else {
2251                                         ins->opcode = OP_MOVE;
2252                                         ins->sreg1 = last_ins->dreg;
2253                                 }
2254
2255                                 //g_assert_not_reached ();
2256
2257 #if 0
2258                         /*
2259                          * OP_STORE_MEMBASE_IMM imm, offset(basereg)
2260                          * OP_LOAD_MEMBASE offset(basereg), reg
2261                          * -->
2262                          * OP_STORE_MEMBASE_IMM imm, offset(basereg)
2263                          * OP_ICONST reg, imm
2264                          */
2265                         } else if (last_ins && (last_ins->opcode == OP_STOREI4_MEMBASE_IMM
2266                                                 || last_ins->opcode == OP_STORE_MEMBASE_IMM) &&
2267                                    ins->inst_basereg == last_ins->inst_destbasereg &&
2268                                    ins->inst_offset == last_ins->inst_offset) {
2269                                 //static int c = 0; printf ("MATCHX %s %d\n", cfg->method->name,c++);
2270                                 ins->opcode = OP_ICONST;
2271                                 ins->inst_c0 = last_ins->inst_imm;
2272                                 g_assert_not_reached (); // check this rule
2273 #endif
2274                         }
2275                         break;
2276                 case OP_LOADU1_MEMBASE:
2277                 case OP_LOADI1_MEMBASE:
2278                         if (last_ins && (last_ins->opcode == OP_STOREI1_MEMBASE_REG) &&
2279                                         ins->inst_basereg == last_ins->inst_destbasereg &&
2280                                         ins->inst_offset == last_ins->inst_offset) {
2281                                 ins->opcode = (ins->opcode == OP_LOADI1_MEMBASE) ? CEE_CONV_I1 : CEE_CONV_U1;
2282                                 ins->sreg1 = last_ins->sreg1;
2283                         }
2284                         break;
2285                 case OP_LOADU2_MEMBASE:
2286                 case OP_LOADI2_MEMBASE:
2287                         if (last_ins && (last_ins->opcode == OP_STOREI2_MEMBASE_REG) &&
2288                                         ins->inst_basereg == last_ins->inst_destbasereg &&
2289                                         ins->inst_offset == last_ins->inst_offset) {
2290                                 ins->opcode = (ins->opcode == OP_LOADI2_MEMBASE) ? CEE_CONV_I2 : CEE_CONV_U2;
2291                                 ins->sreg1 = last_ins->sreg1;
2292                         }
2293                         break;
2294                 case CEE_CONV_I4:
2295                 case CEE_CONV_U4:
2296                 case OP_MOVE:
2297                         /*
2298                          * OP_MOVE reg, reg
2299                          */
2300                         if (ins->dreg == ins->sreg1) {
2301                                 MONO_DEL_INS (ins);
2302                                 continue;
2303                         }
2304                         /*
2305                          * OP_MOVE sreg, dreg
2306                          * OP_MOVE dreg, sreg
2307                          */
2308                         if (last_ins && last_ins->opcode == OP_MOVE &&
2309                             ins->sreg1 == last_ins->dreg &&
2310                             ins->dreg == last_ins->sreg1) {
2311                                 MONO_DEL_INS (ins);
2312                                 continue;
2313                         }
2314                         break;
2315                 }
2316         }
2317 }
2318
2319 /*========================= End of Function ========================*/
2320
2321 /*------------------------------------------------------------------*/
2322 /*                                                                  */
2323 /* Name         - mono_arch_local_regalloc.                         */
2324 /*                                                                  */
2325 /* Function     - We first scan the list of instructions and we     */
2326 /*                save the liveness information of each register    */
2327 /*                (when the register is first used, when its value  */
2328 /*                is set etc.). We also reverse the list of instr-  */
2329 /*                uctions (in the InstList list) because assigning  */
2330 /*                registers backwards allows for more tricks to be  */
2331 /*                used.                                             */
2332 /*                                                                  */
2333 /*------------------------------------------------------------------*/
2334
2335 void
2336 mono_arch_local_regalloc (MonoCompile *cfg, MonoBasicBlock *bb)
2337 {
2338         mono_local_regalloc(cfg, bb);
2339 }
2340
2341 /*========================= End of Function ========================*/
2342
2343 /*------------------------------------------------------------------*/
2344 /*                                                                  */
2345 /* Name         - emit_float_to_int                                 */
2346 /*                                                                  */
2347 /* Function     - Create instructions which will convert a floating */
2348 /*                point value to integer.                           */
2349 /*                                                                  */
2350 /*------------------------------------------------------------------*/
2351
2352 static guchar*
2353 emit_float_to_int (MonoCompile *cfg, guchar *code, int dreg, int sreg, int size, gboolean is_signed)
2354 {
2355         /* sreg is a float, dreg is an integer reg. */
2356         if (is_signed) {
2357                 s390_cfdbr (code, dreg, 5, sreg);
2358                 switch (size) {
2359                         case 1:
2360                                 s390_lhi  (code, s390_r0, 0);
2361                                 s390_lhi  (code, s390_r13, 0xff);
2362                                 s390_ltr  (code, dreg, dreg);
2363                                 s390_jnl  (code, 4);
2364                                 s390_lhi  (code, s390_r0, 0x80);
2365                                 s390_nr   (code, dreg, s390_r13);
2366                                 s390_or   (code, dreg, s390_r0);
2367                                 break;
2368                 }
2369         } else {
2370                 short *o[1];
2371                 s390_basr   (code, s390_r13, 0);
2372                 s390_j      (code, 10);
2373                 s390_llong  (code, 0x41e0000000000000);
2374                 s390_llong  (code, 0x41f0000000000000);
2375                 s390_ldr    (code, s390_f15, sreg);
2376                 s390_cdb    (code, s390_f15, 0, s390_r13, 4);
2377                 s390_jl     (code, 0); CODEPTR(code, o[0]);
2378                 s390_sdb    (code, s390_f15, 0, s390_r13, 12);
2379                 s390_cfdbr  (code, dreg, 7, s390_f15);
2380                 s390_j      (code, 4);
2381                 PTRSLOT(code, o[0]);
2382                 s390_cfdbr  (code, dreg, 5, sreg);
2383                 switch (size) {
2384                         case 1:
2385                                 s390_lhi  (code, s390_r0, 0xff);
2386                                 s390_nr   (code, dreg, s390_r0);
2387                                 break;
2388                         case 2:
2389                                 s390_lhi  (code, s390_r0, -1);
2390                                 s390_srl  (code, s390_r0, 0, 16);
2391                                 s390_nr   (code, dreg, s390_r0);
2392                                 break;
2393                 }
2394         }
2395         return code;
2396 }
2397
2398 /*========================= End of Function ========================*/
2399
2400 /*------------------------------------------------------------------*/
2401 /*                                                                  */
2402 /* Name         - mono_arch_output_basic_block                      */
2403 /*                                                                  */
2404 /* Function     - Perform the "real" work of emitting instructions  */
2405 /*                that will do the work of in the basic block.      */
2406 /*                                                                  */
2407 /*------------------------------------------------------------------*/
2408
2409 void
2410 mono_arch_output_basic_block (MonoCompile *cfg, MonoBasicBlock *bb)
2411 {
2412         MonoInst *ins, *next;
2413         MonoCallInst *call;
2414         guint offset;
2415         guint8 *code = cfg->native_code + cfg->code_len;
2416         guint last_offset = 0;
2417         int max_len, cpos, src2;
2418
2419         if (cfg->opt & MONO_OPT_PEEPHOLE)
2420                 peephole_pass (cfg, bb);
2421
2422         /* we don't align basic blocks of loops on s390 */
2423
2424         if (cfg->verbose_level > 2)
2425                 g_print ("Basic block %d starting at offset 0x%x\n", bb->block_num, bb->native_offset);
2426
2427         cpos = bb->max_offset;
2428
2429         if (cfg->prof_options & MONO_PROFILE_COVERAGE) {
2430                 //MonoCoverageInfo *cov = mono_get_coverage_info (cfg->method);
2431                 //g_assert (!mono_compile_aot);
2432                 //cpos += 6;
2433                 //if (bb->cil_code)
2434                 //      cov->data [bb->dfn].iloffset = bb->cil_code - cfg->cil_code;
2435                 /* this is not thread save, but good enough */
2436                 /* fixme: howto handle overflows? */
2437                 //x86_inc_mem (code, &cov->data [bb->dfn].count);
2438         }
2439
2440         MONO_BB_FOR_EACH_INS (bb, ins) {
2441                 offset = code - cfg->native_code;
2442
2443                 max_len = ((guint8 *)ins_get_spec (ins->opcode))[MONO_INST_LEN];
2444
2445                 if (offset > (cfg->code_size - max_len - 16)) {
2446                         cfg->code_size *= 2;
2447                         cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
2448                         code = cfg->native_code + offset;
2449                 }
2450
2451                 mono_debug_record_line_number (cfg, ins, offset);
2452
2453                 switch (ins->opcode) {
2454                 case OP_STOREI1_MEMBASE_IMM: {
2455                         s390_lhi (code, s390_r0, ins->inst_imm);
2456                         if (s390_is_uimm12(ins->inst_offset))
2457                                 s390_stc (code, s390_r0, 0, ins->inst_destbasereg, ins->inst_offset);
2458                         else {
2459                                 s390_basr (code, s390_r13, 0);
2460                                 s390_j    (code, 4);
2461                                 s390_word (code, ins->inst_offset);
2462                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2463                                 s390_stc  (code, s390_r0, s390_r13, ins->inst_destbasereg, 0);
2464                         }
2465                 }
2466                         break;
2467                 case OP_STOREI2_MEMBASE_IMM: {
2468                         s390_lhi (code, s390_r0, ins->inst_imm);
2469                         if (s390_is_uimm12(ins->inst_offset)) {
2470                                 s390_sth (code, s390_r0, 0, ins->inst_destbasereg, ins->inst_offset);
2471                         } else {
2472                                 s390_basr (code, s390_r13, 0);
2473                                 s390_j    (code, 4);
2474                                 s390_word (code, ins->inst_offset);
2475                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2476                                 s390_sth  (code, s390_r0, s390_r13, ins->inst_destbasereg, 0);
2477                         }
2478                 }
2479                         break;
2480                 case OP_STORE_MEMBASE_IMM:
2481                 case OP_STOREI4_MEMBASE_IMM: {
2482                         if (s390_is_imm16(ins->inst_imm)) {
2483                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2484                         } else {
2485                                 s390_basr (code, s390_r13, 0);
2486                                 s390_j    (code, 4);
2487                                 s390_word (code, ins->inst_imm);
2488                                 s390_l    (code, s390_r0, 0, s390_r13, 4);
2489                         }
2490                         if (s390_is_uimm12(ins->inst_offset)) {
2491                                 s390_st  (code, s390_r0, 0, ins->inst_destbasereg, ins->inst_offset);
2492                         } else {
2493                                 s390_basr (code, s390_r13, 0);
2494                                 s390_j    (code, 4);
2495                                 s390_word (code, ins->inst_offset);
2496                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2497                                 s390_st   (code, s390_r0, s390_r13, ins->inst_destbasereg, 0);
2498                         }
2499                 }
2500                         break;
2501                 case OP_STOREI1_MEMBASE_REG: {
2502                         if (s390_is_uimm12(ins->inst_offset)) {
2503                                 s390_stc  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
2504                         } else {
2505                                 s390_basr (code, s390_r13, 0);
2506                                 s390_j    (code, 4);
2507                                 s390_word (code, ins->inst_offset);
2508                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2509                                 s390_stc  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
2510                         }
2511                 }
2512                         break;
2513                 case OP_STOREI2_MEMBASE_REG: {
2514                         if (s390_is_uimm12(ins->inst_offset)) {
2515                                 s390_sth  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
2516                         } else {
2517                                 s390_basr (code, s390_r13, 0);
2518                                 s390_j    (code, 4);
2519                                 s390_word (code, ins->inst_offset);
2520                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2521                                 s390_sth  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
2522                         }
2523                 }
2524                         break;
2525                 case OP_STORE_MEMBASE_REG:
2526                 case OP_STOREI4_MEMBASE_REG: {
2527                         if (s390_is_uimm12(ins->inst_offset)) {
2528                                 s390_st   (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
2529                         } else {
2530                                 s390_basr (code, s390_r13, 0);
2531                                 s390_j    (code, 4);
2532                                 s390_word (code, ins->inst_offset);
2533                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2534                                 s390_st   (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
2535                         }
2536                 }
2537                         break;
2538                 case OP_LOADU4_MEM:
2539                         g_assert_not_reached ();
2540                         break;
2541                 case OP_LOAD_MEMBASE:
2542                 case OP_LOADI4_MEMBASE:
2543                 case OP_LOADU4_MEMBASE: {
2544                         if (s390_is_uimm12(ins->inst_offset))
2545                                 s390_l    (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
2546                         else {
2547                                 if (s390_is_imm16(ins->inst_offset)) {
2548                                         s390_lhi (code, s390_r13, ins->inst_offset);
2549                                         s390_l   (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
2550                                 } else {
2551                                         s390_basr (code, s390_r13, 0);
2552                                         s390_j    (code, 4);
2553                                         s390_word (code, ins->inst_offset);
2554                                         s390_l    (code, s390_r13, 0, s390_r13, 4);
2555                                         s390_l    (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
2556                                 }
2557                         }
2558                 }
2559                         break;
2560                 case OP_LOADU1_MEMBASE: {
2561                         s390_lhi (code, s390_r0, 0);
2562                         if (s390_is_uimm12(ins->inst_offset))
2563                                 s390_ic   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
2564                         else {
2565                                 s390_basr (code, s390_r13, 0);
2566                                 s390_j    (code, 4);
2567                                 s390_word (code, ins->inst_offset);
2568                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2569                                 s390_ic   (code, s390_r0, s390_r13, ins->inst_basereg, 0);
2570                         }
2571                         s390_lr   (code, ins->dreg, s390_r0);
2572                 }
2573                         break;
2574                 case OP_LOADI1_MEMBASE: {
2575                         s390_lhi (code, s390_r0, 0);
2576                         if (s390_is_uimm12(ins->inst_offset))
2577                                 s390_ic   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
2578                         else {
2579                                 s390_basr (code, s390_r13, 0);
2580                                 s390_j    (code, 4);
2581                                 s390_word (code, ins->inst_offset);
2582                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2583                                 s390_ic   (code, s390_r0, s390_r13, ins->inst_basereg, 0);
2584                         }
2585                         s390_lhi  (code, s390_r13, 0x80);
2586                         s390_nr   (code, s390_r13, s390_r0);
2587                         s390_jz   (code, 5);
2588                         s390_lhi  (code, s390_r13, 0xff00);
2589                         s390_or   (code, s390_r0, s390_r13);
2590                         s390_lr   (code, ins->dreg, s390_r0);
2591                 }
2592                         break;
2593                 case OP_LOADU2_MEMBASE: {
2594                         s390_lhi (code, s390_r0, 0);
2595                         if (s390_is_uimm12(ins->inst_offset))
2596                                 s390_icm  (code, s390_r0, 3, ins->inst_basereg, ins->inst_offset);
2597                         else {
2598                                 s390_basr (code, s390_r13, 0);
2599                                 s390_j    (code, 4);
2600                                 s390_word (code, ins->inst_offset);
2601                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2602                                 s390_ar   (code, s390_r13, ins->inst_basereg);
2603                                 s390_icm  (code, s390_r0, 3, s390_r13, 0);
2604                         }
2605                         s390_lr  (code, ins->dreg, s390_r0);
2606                 }
2607                         break;
2608                 case OP_LOADI2_MEMBASE: {
2609                         s390_lhi (code, s390_r0, 0);
2610                         if (s390_is_uimm12(ins->inst_offset))
2611                                 s390_lh   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
2612                         else {
2613                                 s390_basr (code, s390_r13, 0);
2614                                 s390_j    (code, 4);
2615                                 s390_word (code, ins->inst_offset);
2616                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2617                                 s390_lh   (code, s390_r0, s390_r13, ins->inst_basereg, 0);
2618                         }
2619                         s390_lr  (code, ins->dreg, s390_r0);
2620                 }
2621                         break;
2622                 case CEE_CONV_I1: {
2623                         s390_lhi  (code, s390_r0, 0x80);
2624                         if (ins->dreg != ins->sreg1) {
2625                                 s390_lr   (code, ins->dreg, ins->sreg1);
2626                         }
2627                         s390_nr   (code, s390_r0, ins->sreg1);
2628                         s390_jz   (code, 7);
2629                         s390_lhi  (code, s390_r13, -1);
2630                         s390_sll  (code, s390_r13, 0, 8);
2631                         s390_or   (code, ins->dreg, s390_r13);
2632                 }
2633                         break;
2634                 case CEE_CONV_I2: {
2635                         s390_lhi  (code, s390_r0, 0x80);
2636                         s390_sll  (code, s390_r0, 0, 8);
2637                         if (ins->dreg != ins->sreg1) {
2638                                 s390_lr   (code, ins->dreg, ins->sreg1);
2639                         }
2640                         s390_nr   (code, s390_r0, ins->sreg1);
2641                         s390_jz   (code, 7);
2642                         s390_lhi  (code, s390_r13, -1);
2643                         s390_sll  (code, s390_r13, 0, 16);
2644                         s390_or   (code, ins->dreg, s390_r13);
2645                 }
2646                         break;
2647                 case CEE_CONV_U1: {
2648                         s390_lhi  (code, s390_r0, 0xff);
2649                         if (ins->dreg != ins->sreg1) {
2650                                 s390_lr   (code, ins->dreg, ins->sreg1);
2651                         }
2652                         s390_nr   (code, ins->dreg, s390_r0);
2653                 }
2654                         break;
2655                 case CEE_CONV_U2: {
2656                         s390_lhi  (code, s390_r0, -1);
2657                         s390_sll  (code, s390_r0, 0, 16);
2658                         s390_srl  (code, s390_r0, 0, 16);
2659                         if (ins->dreg != ins->sreg1) {
2660                                 s390_lr   (code, ins->dreg, ins->sreg1);
2661                         }
2662                         s390_nr   (code, ins->dreg, s390_r0);
2663                 }
2664                         break;
2665                 case OP_COMPARE: {
2666                         next = mono_inst_list_next (&ins->node, &bb->ins_list);
2667                         if ((next) &&
2668                             (((next->opcode >= CEE_BNE_UN) &&
2669                               (next->opcode <= CEE_BLT_UN)) ||
2670                              ((next->opcode >= OP_COND_EXC_NE_UN) &&
2671                               (next->opcode <= OP_COND_EXC_LT_UN)) ||
2672                              ((next->opcode == OP_CLT_UN) ||
2673                               (next->opcode == OP_CGT_UN))))
2674                                 s390_clr  (code, ins->sreg1, ins->sreg2);
2675                         else
2676                                 s390_cr   (code, ins->sreg1, ins->sreg2);
2677                 }
2678                         break;
2679                 case OP_COMPARE_IMM: {
2680                         next = mono_inst_list_next (&ins->node, &bb->ins_list);
2681                         if (s390_is_imm16 (ins->inst_imm)) {
2682                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2683                                 if ((next) &&
2684                                     (((next->opcode >= CEE_BNE_UN) &&
2685                                       (next->opcode <= CEE_BLT_UN)) ||
2686                                      ((next->opcode >= OP_COND_EXC_NE_UN) &&
2687                                       (next->opcode <= OP_COND_EXC_LT_UN)) ||
2688                                      ((next->opcode == OP_CLT_UN) ||
2689                                       (next->opcode == OP_CGT_UN))))
2690                                         s390_clr  (code, ins->sreg1, s390_r0);
2691                                 else
2692                                         s390_cr   (code, ins->sreg1, s390_r0);
2693                         }
2694                         else {
2695                                 s390_basr (code, s390_r13, 0);
2696                                 s390_j    (code, 4);
2697                                 s390_word (code, ins->inst_imm);
2698                                 if ((next) &&
2699                                     (((next->opcode >= CEE_BNE_UN) &&
2700                                       (next->opcode <= CEE_BLT_UN)) ||
2701                                      ((next->opcode >= OP_COND_EXC_NE_UN) &&
2702                                       (next->opcode <= OP_COND_EXC_LT_UN)) ||
2703                                      ((next->opcode == OP_CLT_UN) ||
2704                                       (next->opcode == OP_CGT_UN))))
2705                                         s390_cl   (code, ins->sreg1, 0, s390_r13, 4);
2706                                 else
2707                                         s390_c    (code, ins->sreg1, 0, s390_r13, 4);
2708                         }
2709                 }
2710                         break;
2711                 case OP_BREAK: {
2712                         mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS, mono_break);
2713                         s390_brasl (code, s390_r14, 0);
2714                 }
2715                         break;
2716                 case OP_ADDCC: {
2717                         CHECK_SRCDST_COM;
2718                         s390_alr  (code, ins->dreg, src2);
2719                 }
2720                         break;
2721                 case CEE_ADD: {
2722                         CHECK_SRCDST_COM;
2723                         s390_ar   (code, ins->dreg, src2);
2724                 }
2725                         break;
2726                 case OP_ADC: {
2727                         CHECK_SRCDST_COM;
2728                         s390_alcr (code, ins->dreg, src2);
2729                 }
2730                         break;
2731                 case OP_ADD_IMM: {
2732                         if (ins->dreg != ins->sreg1) {
2733                                 s390_lr   (code, ins->dreg, ins->sreg1);
2734                         }
2735                         next = mono_inst_list_next (&ins->node, &bb->ins_list);
2736                         if ((next) &&
2737                             (next->opcode == OP_ADC_IMM)) {
2738                                 s390_basr (code, s390_r13, 0);
2739                                 s390_j    (code, 4);
2740                                 s390_word (code, ins->inst_imm);
2741                                 s390_a (code, ins->dreg, 0, s390_r13, 4);
2742                         } else {
2743                                 if (s390_is_imm16 (ins->inst_imm)) {
2744                                         s390_ahi  (code, ins->dreg, ins->inst_imm);
2745                                 } else {
2746                                         s390_basr (code, s390_r13, 0);
2747                                         s390_j    (code, 4);
2748                                         s390_word (code, ins->inst_imm);
2749                                         s390_a (code, ins->dreg, 0, s390_r13, 4);
2750                                 }
2751                         }
2752                 }
2753                         break;
2754                 case OP_ADDCC_IMM: {
2755                         next = mono_inst_list_next (&ins->node, &bb->ins_list);
2756                         if ((next) &&
2757                             (next->opcode == OP_ADC_IMM)) {
2758                                 s390_basr (code, s390_r13, 0);
2759                                 s390_j    (code, 4);
2760                                 s390_word (code, ins->inst_imm);
2761                                 if (ins->dreg != ins->sreg1) {
2762                                         s390_lr   (code, ins->dreg, ins->sreg1);
2763                                 }
2764                                 s390_al   (code, ins->dreg, 0, s390_r13, 4);
2765                         } else {
2766                                 if (s390_is_imm16 (ins->inst_imm)) {
2767                                         if (ins->dreg != ins->sreg1) {
2768                                                 s390_lr   (code, ins->dreg, ins->sreg1);
2769                                         }
2770                                         s390_lhi  (code, s390_r0, ins->inst_imm);
2771                                         s390_alcr (code, ins->dreg, s390_r0);
2772                                 } else {
2773                                         s390_basr (code, s390_r13, 0);
2774                                         s390_j    (code, 4);
2775                                         s390_word (code, ins->inst_imm);
2776                                         if (ins->dreg != ins->sreg1) {
2777                                                 s390_lr   (code, ins->dreg, ins->sreg1);
2778                                         }
2779                                         s390_al   (code, ins->dreg, 0, s390_r13, 4);
2780                                 }
2781                         }
2782                 }
2783                         break;
2784                 case OP_ADC_IMM: {
2785                         if (s390_is_imm16 (ins->inst_imm)) {
2786                                 if (ins->dreg != ins->sreg1) {
2787                                         s390_lr   (code, ins->dreg, ins->sreg1);
2788                                 }
2789                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2790                                 s390_alcr (code, ins->dreg, s390_r0);
2791                         } else {
2792                                 s390_basr (code, s390_r13, 0);
2793                                 s390_j    (code, 4);
2794                                 s390_word (code, ins->inst_imm);
2795                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2796                                 s390_alcr (code, ins->dreg, s390_r13);
2797                         }
2798                 }
2799                         break;
2800                 case CEE_ADD_OVF: {
2801                         CHECK_SRCDST_COM;
2802                         s390_ar   (code, ins->dreg, src2);
2803                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2804                 }
2805                         break;
2806                 case CEE_ADD_OVF_UN: {
2807                         CHECK_SRCDST_COM;
2808                         s390_alr  (code, ins->dreg, src2);
2809                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
2810                 }
2811                         break;
2812                 case OP_LADD: {
2813                         s390_alr  (code, s390_r0, ins->sreg1);
2814                         s390_jnc  (code, 4);
2815                         s390_ahi  (code, s390_r1, 1);
2816                         s390_ar   (code, s390_r1, ins->sreg2);
2817                         s390_lr   (code, ins->dreg, s390_r0);
2818                         s390_lr   (code, ins->dreg+1, s390_r1);
2819                 }
2820                         break;
2821                 case OP_LADD_OVF: {
2822                         short int *o[1];
2823                         s390_alr  (code, s390_r0, ins->sreg1);
2824                         s390_jnc  (code, 0); CODEPTR(code, o[0]);
2825                         s390_ahi  (code, s390_r1, 1);
2826                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2827                         PTRSLOT   (code, o[0]);
2828                         s390_ar   (code, s390_r1, ins->sreg2);
2829                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2830                         s390_lr   (code, ins->dreg, s390_r0);
2831                         s390_lr   (code, ins->dreg+1, s390_r1);
2832                 }
2833                         break;
2834                 case OP_LADD_OVF_UN: {
2835                         s390_alr  (code, s390_r0, ins->sreg1);
2836                         s390_alcr (code, s390_r1, ins->sreg2);
2837                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
2838                         s390_lr   (code, ins->dreg, s390_r0);
2839                         s390_lr   (code, ins->dreg+1, s390_r1);
2840                 }
2841                         break;
2842                 case OP_ADD_OVF_CARRY: {
2843                         CHECK_SRCDST_COM;
2844                         s390_lhi  (code, s390_r0, 0);
2845                         s390_lr   (code, s390_r1, s390_r0);
2846                         s390_alcr (code, s390_r0, s390_r1);
2847                         s390_ar   (code, ins->dreg, src2);
2848                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2849                         s390_ar   (code, ins->dreg, s390_r0);
2850                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2851                 }
2852                         break;
2853                 case OP_ADD_OVF_UN_CARRY: {
2854                         CHECK_SRCDST_COM;
2855                         s390_alcr (code, ins->dreg, src2);
2856                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
2857                 }
2858                         break;
2859                 case OP_SUBCC: {
2860                         CHECK_SRCDST_NCOM;
2861                         s390_slr (code, ins->dreg, src2);
2862                 }
2863                         break;
2864                 case CEE_SUB: {
2865                         CHECK_SRCDST_NCOM;
2866                         s390_sr   (code, ins->dreg, src2);
2867                 }
2868                         break;
2869                 case OP_SBB: {
2870                         CHECK_SRCDST_NCOM;
2871                         s390_slbr (code, ins->dreg, src2);
2872                 }
2873                         break;
2874                 case OP_SUBCC_IMM: {
2875                         if (s390_is_imm16 (-ins->inst_imm)) {
2876                                 if (ins->dreg != ins->sreg1) {
2877                                         s390_lr   (code, ins->dreg, ins->sreg1);
2878                                 }
2879                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2880                                 s390_slr  (code, ins->dreg, s390_r0);
2881                         } else {
2882                                 s390_basr (code, s390_r13, 0);
2883                                 s390_j    (code, 4);
2884                                 s390_word (code, ins->inst_imm);
2885                                 if (ins->dreg != ins->sreg1) {
2886                                         s390_lr   (code, ins->dreg, ins->sreg1);
2887                                 }
2888                                 s390_sl   (code, ins->dreg, 0, s390_r13, 4);
2889                         }
2890                 }
2891                         break;
2892                 case OP_SUB_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_ahi  (code, ins->dreg, -ins->inst_imm);
2898                         } else {
2899                                 s390_basr (code, s390_r13, 0);
2900                                 s390_j    (code, 4);
2901                                 s390_word (code, ins->inst_imm);
2902                                 if (ins->dreg != ins->sreg1) {
2903                                         s390_lr   (code, ins->dreg, ins->sreg1);
2904                                 }
2905                                 s390_s    (code, ins->dreg, 0, s390_r13, 4);
2906                         }
2907                 }
2908                         break;
2909                 case OP_SBB_IMM: {
2910                         if (ins->dreg != ins->sreg1) {
2911                                 s390_lr    (code, ins->dreg, ins->sreg1);
2912                         }
2913                         if (s390_is_imm16 (-ins->inst_imm)) {
2914                                 s390_lhi   (code, s390_r0, ins->inst_imm);
2915                                 s390_slbr  (code, ins->dreg, s390_r0);
2916                         } else {
2917                                 s390_basr (code, s390_r13, 0);
2918                                 s390_j    (code, 4);
2919                                 s390_word (code, ins->inst_imm);
2920                                 s390_slb  (code, ins->dreg, 0, s390_r13, 4);
2921                         }
2922                 }
2923                         break;
2924                 case CEE_SUB_OVF: {
2925                         CHECK_SRCDST_NCOM;
2926                         s390_sr   (code, ins->dreg, src2);
2927                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2928                 }
2929                         break;
2930                 case CEE_SUB_OVF_UN: {
2931                         CHECK_SRCDST_NCOM;
2932                         s390_slr  (code, ins->dreg, src2);
2933                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
2934                 }
2935                         break;
2936                 case OP_LSUB: {
2937                         s390_lr   (code, s390_r14, ins->sreg2);
2938                         s390_slr  (code, s390_r0, ins->sreg1);
2939                         s390_jnl  (code, 4);
2940                         s390_ahi  (code, s390_r14, 1);
2941                         s390_sr   (code, s390_r1, s390_r14);
2942                         s390_lr   (code, ins->dreg, s390_r0);
2943                         s390_lr   (code, ins->dreg+1, s390_r1);
2944                 }
2945                         break;
2946                 case OP_LSUB_OVF: {
2947                         short int *o[1];
2948                         s390_lr   (code, s390_r14, ins->sreg2);
2949                         s390_slr  (code, s390_r0, ins->sreg1);
2950                         s390_jnl  (code, 0); CODEPTR(code, o[0]);
2951                         s390_ahi  (code, s390_r14, 1);
2952                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2953                         PTRSLOT   (code, o[0]);
2954                         s390_sr   (code, s390_r1, s390_r14);
2955                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2956                         s390_lr   (code, ins->dreg, s390_r0);
2957                         s390_lr   (code, ins->dreg+1, s390_r1);
2958                 }
2959                         break;
2960                 case OP_LSUB_OVF_UN: {
2961                         s390_slr  (code, s390_r0, ins->sreg1);
2962                         s390_slbr (code, s390_r1, ins->sreg2);
2963                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, "OverflowException");
2964                         s390_lr   (code, ins->dreg, s390_r0);
2965                         s390_lr   (code, ins->dreg+1, s390_r1);
2966                 }
2967                         break;
2968                 case OP_SUB_OVF_CARRY: {
2969                         CHECK_SRCDST_NCOM;
2970                         s390_lhi  (code, s390_r0, 0);
2971                         s390_lr   (code, s390_r1, s390_r0);
2972                         s390_slbr (code, s390_r0, s390_r1);
2973                         s390_sr   (code, ins->dreg, src2);
2974                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2975                         s390_ar   (code, ins->dreg, s390_r0);
2976                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2977                 }
2978                         break;
2979                 case OP_SUB_OVF_UN_CARRY: {
2980                         CHECK_SRCDST_NCOM;
2981                         s390_slbr (code, ins->dreg, src2);
2982                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
2983                 }
2984                         break;
2985                 case CEE_AND: {
2986                         if (ins->sreg1 == ins->dreg) {
2987                                 s390_nr   (code, ins->dreg, ins->sreg2);
2988                         }
2989                         else {
2990                                 if (ins->sreg2 == ins->dreg) {
2991                                         s390_nr  (code, ins->dreg, ins->sreg1);
2992                                 }
2993                                 else {
2994                                         s390_lr  (code, ins->dreg, ins->sreg1);
2995                                         s390_nr  (code, ins->dreg, ins->sreg2);
2996                                 }
2997                         }
2998                 }
2999                         break;
3000                 case OP_AND_IMM: {
3001                         if (s390_is_imm16 (ins->inst_imm)) {
3002                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3003                                 if (ins->dreg != ins->sreg1) {
3004                                         s390_lr   (code, ins->dreg, ins->sreg1);
3005                                 }
3006                                 s390_nr   (code, ins->dreg, s390_r0);
3007                         } else {
3008                                 s390_basr (code, s390_r13, 0);
3009                                 s390_j    (code, 4);
3010                                 s390_word (code, ins->inst_imm);
3011                                 if (ins->dreg != ins->sreg1) {
3012                                         s390_lr   (code, ins->dreg, ins->sreg1);
3013                                 }
3014                                 s390_n    (code, ins->dreg, 0, s390_r13, 4);
3015                         }
3016                 }
3017                         break;
3018                 case CEE_DIV: {
3019                         s390_lr   (code, s390_r0, ins->sreg1);
3020                         s390_srda (code, s390_r0, 0, 32);
3021                         s390_dr   (code, s390_r0, ins->sreg2);
3022                         s390_lr   (code, ins->dreg, s390_r1);
3023                 }
3024                         break;
3025                 case CEE_DIV_UN: {
3026                         s390_lr   (code, s390_r0, ins->sreg1);
3027                         s390_srdl (code, s390_r0, 0, 32);
3028                         s390_dlr  (code, s390_r0, ins->sreg2);
3029                         s390_lr   (code, ins->dreg, s390_r1);
3030                 }
3031                         break;
3032                 case OP_DIV_IMM: {
3033                         if (s390_is_imm16 (ins->inst_imm)) {
3034                                 s390_lhi  (code, s390_r13, ins->inst_imm);
3035                                 s390_lr   (code, s390_r0, ins->sreg1);
3036                         } else {
3037                                 s390_basr (code, s390_r13, 0);
3038                                 s390_j    (code, 4);
3039                                 s390_word (code, ins->inst_imm);
3040                                 s390_lr   (code, s390_r0, ins->sreg1);
3041                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3042                         }
3043                         s390_srda (code, s390_r0, 0, 32);
3044                         s390_dr   (code, s390_r0, s390_r13);
3045                         s390_lr   (code, ins->dreg, s390_r1);
3046                 }
3047                         break;
3048                 case CEE_REM: {
3049                         s390_lr   (code, s390_r0, ins->sreg1);
3050                         s390_srda (code, s390_r0, 0, 32);
3051                         s390_dr   (code, s390_r0, ins->sreg2);
3052                         s390_lr   (code, ins->dreg, s390_r0);
3053                         break;
3054                 case CEE_REM_UN:
3055                         s390_lr   (code, s390_r0, ins->sreg1);
3056                         s390_srdl (code, s390_r0, 0, 32);
3057                         s390_dlr  (code, s390_r0, ins->sreg2);
3058                         s390_lr   (code, ins->dreg, s390_r0);
3059                 }
3060                         break;
3061                 case OP_REM_IMM: {
3062                         if (s390_is_imm16 (ins->inst_imm)) {
3063                                 s390_lhi  (code, s390_r13, ins->inst_imm);
3064                                 s390_lr   (code, s390_r0, ins->sreg1);
3065                         } else {
3066                                 s390_basr (code, s390_r13, 0);
3067                                 s390_j    (code, 4);
3068                                 s390_word (code, ins->inst_imm);
3069                                 s390_lr   (code, s390_r0, ins->sreg1);
3070                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3071                         }
3072                         s390_srda (code, s390_r0, 0, 32);
3073                         s390_dr   (code, s390_r0, s390_r13);
3074                         s390_lr   (code, ins->dreg, s390_r0);
3075                 }
3076                         break;
3077                 case CEE_OR: {
3078                         if (ins->sreg1 == ins->dreg) {
3079                                 s390_or   (code, ins->dreg, ins->sreg2);
3080                         }
3081                         else {
3082                                 if (ins->sreg2 == ins->dreg) {
3083                                         s390_or  (code, ins->dreg, ins->sreg1);
3084                                 }
3085                                 else {
3086                                         s390_lr  (code, ins->dreg, ins->sreg1);
3087                                         s390_or  (code, ins->dreg, ins->sreg2);
3088                                 }
3089                         }
3090                 }
3091                         break;
3092                 case OP_OR_IMM: {
3093                         if (s390_is_imm16 (ins->inst_imm)) {
3094                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3095                                 if (ins->dreg != ins->sreg1) {
3096                                         s390_lr   (code, ins->dreg, ins->sreg1);
3097                                 }
3098                                 s390_or   (code, ins->dreg, s390_r0);
3099                         } else {
3100                                 s390_basr (code, s390_r13, 0);
3101                                 s390_j    (code, 4);
3102                                 s390_word (code, ins->inst_imm);
3103                                 if (ins->dreg != ins->sreg1) {
3104                                         s390_lr   (code, ins->dreg, ins->sreg1);
3105                                 }
3106                                 s390_o    (code, ins->dreg, 0, s390_r13, 4);
3107                         }
3108                 }
3109                         break;
3110                 case CEE_XOR: {
3111                         if (ins->sreg1 == ins->dreg) {
3112                                 s390_xr   (code, ins->dreg, ins->sreg2);
3113                         }
3114                         else {
3115                                 if (ins->sreg2 == ins->dreg) {
3116                                         s390_xr  (code, ins->dreg, ins->sreg1);
3117                                 }
3118                                 else {
3119                                         s390_lr  (code, ins->dreg, ins->sreg1);
3120                                         s390_xr  (code, ins->dreg, ins->sreg2);
3121                                 }
3122                         }
3123                 }
3124                         break;
3125                 case OP_XOR_IMM: {
3126                         if (s390_is_imm16 (ins->inst_imm)) {
3127                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3128                                 if (ins->dreg != ins->sreg1) {
3129                                         s390_lr   (code, ins->dreg, ins->sreg1);
3130                                 }
3131                                 s390_xr   (code, ins->dreg, s390_r0);
3132                         } else {
3133                                 s390_basr (code, s390_r13, 0);
3134                                 s390_j    (code, 4);
3135                                 s390_word (code, ins->inst_imm);
3136                                 if (ins->dreg != ins->sreg1) {
3137                                         s390_lr   (code, ins->dreg, ins->sreg1);
3138                                 }
3139                                 s390_x    (code, ins->dreg, 0, s390_r13, 4);
3140                         }
3141                 }
3142                         break;
3143                 case CEE_SHL: {
3144                         CHECK_SRCDST_NCOM;
3145                         s390_sll  (code, ins->dreg, src2, 0);
3146                 }
3147                         break;
3148                 case OP_SHL_IMM: {
3149                         if (ins->sreg1 != ins->dreg) {
3150                                 s390_lr   (code, ins->dreg, ins->sreg1);
3151                         }
3152                         s390_sll  (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3153                 }
3154                         break;
3155                 case CEE_SHR: {
3156                         CHECK_SRCDST_NCOM;
3157                         s390_sra  (code, ins->dreg, src2, 0);
3158                 }
3159                         break;
3160                 case OP_SHR_IMM: {
3161                         if (ins->sreg1 != ins->dreg) {
3162                                 s390_lr   (code, ins->dreg, ins->sreg1);
3163                         }
3164                         s390_sra  (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3165                 }
3166                         break;
3167                 case OP_SHR_UN_IMM: {
3168                         if (ins->sreg1 != ins->dreg) {
3169                                 s390_lr   (code, ins->dreg, ins->sreg1);
3170                         }
3171                         s390_srl  (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3172                 }
3173                         break;
3174                 case CEE_SHR_UN: {
3175                         CHECK_SRCDST_NCOM;
3176                         s390_srl  (code, ins->dreg, src2, 0);
3177                 }
3178                         break;
3179                 case CEE_NOT: {
3180                         if (ins->sreg1 != ins->dreg) {
3181                                 s390_lr   (code, ins->dreg, ins->sreg1);
3182                         }
3183                         s390_lhi (code, s390_r0, -1);
3184                         s390_xr  (code, ins->dreg, s390_r0);
3185                 }
3186                         break;
3187                 case CEE_NEG: {
3188                         s390_lcr (code, ins->dreg, ins->sreg1);
3189                 }
3190                         break;
3191                 case CEE_MUL: {
3192                         if (ins->sreg1 == ins->dreg) {
3193                                 s390_msr  (code, ins->dreg, ins->sreg2);
3194                         }
3195                         else {
3196                                 if (ins->sreg2 == ins->dreg) {
3197                                         s390_msr (code, ins->dreg, ins->sreg1);
3198                                 }
3199                                 else {
3200                                         s390_lr  (code, ins->dreg, ins->sreg1);
3201                                         s390_msr (code, ins->dreg, ins->sreg2);
3202                                 }
3203                         }
3204                 }
3205                         break;
3206                 case OP_MUL_IMM: {
3207                         if (s390_is_imm16 (ins->inst_imm)) {
3208                                 s390_lhi  (code, s390_r13, ins->inst_imm);
3209                         } else {
3210                                 s390_basr (code, s390_r13, 0);
3211                                 s390_j    (code, 4);
3212                                 s390_word (code, ins->inst_imm);
3213 //                              if (ins->dreg != ins->sreg1) {
3214 //                                      s390_lr   (code, ins->dreg, ins->sreg1);
3215 //                              }
3216                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3217                         }
3218                         if (ins->dreg != ins->sreg1) {
3219                                 s390_lr   (code, ins->dreg, ins->sreg1);
3220                         }
3221                         s390_msr  (code, ins->dreg, s390_r13);
3222                 }
3223                         break;
3224                 case CEE_MUL_OVF: {
3225                         short int *o[2];
3226                         s390_ltr  (code, s390_r1, ins->sreg1);
3227                         s390_jz   (code, 0); CODEPTR(code, o[0]);
3228                         s390_ltr  (code, s390_r0, ins->sreg2);
3229                         s390_jnz  (code, 6);
3230                         s390_lhi  (code, s390_r1, 0);
3231                         s390_j    (code, 0); CODEPTR(code, o[1]);
3232                         s390_xr   (code, s390_r0, s390_r1);
3233                         s390_msr  (code, s390_r1, ins->sreg2);
3234                         s390_xr   (code, s390_r0, s390_r1);
3235                         s390_srl  (code, s390_r0, 0, 31);
3236                         s390_ltr  (code, s390_r0, s390_r0);
3237                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3238                         PTRSLOT   (code, o[0]);
3239                         PTRSLOT   (code, o[1]);
3240                         s390_lr   (code, ins->dreg, s390_r1);
3241                 }
3242                         break;
3243                 case CEE_MUL_OVF_UN: {
3244                         s390_lhi  (code, s390_r0, 0);
3245                         s390_lr   (code, s390_r1, ins->sreg1);
3246                         s390_mlr  (code, s390_r0, ins->sreg2);
3247                         s390_ltr  (code, s390_r0, s390_r0);
3248                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3249                         s390_lr   (code, ins->dreg, s390_r1);
3250                 }
3251                         break;
3252                 case OP_LMUL: {
3253                         s390_l    (code, s390_r0, 0, ins->sreg1, 4);
3254                         s390_srda (code, s390_r0, 0, 32);
3255                         s390_m    (code, s390_r0, 0, ins->sreg2, 4);
3256                         s390_l    (code, s390_r0, 0, ins->sreg1, 4);
3257                         s390_srl  (code, s390_r0, 0, 31);
3258                         s390_a    (code, s390_r0, 0, ins->sreg1, 0);
3259                         s390_l    (code, s390_r13, 0, ins->sreg2, 0);
3260                         s390_srl  (code, s390_r13, 0, 31);
3261                         s390_ms   (code, s390_r13, 0, ins->sreg1, 4);
3262                         s390_ar   (code, s390_r0, s390_r13);
3263                         s390_st   (code, s390_r0, 0, ins->dreg, 0);
3264                         s390_st   (code, s390_r1, 0, ins->dreg, 4);
3265                 }
3266                         break;
3267                 case OP_ICONST: {
3268                         if (s390_is_imm16(ins->inst_c0)) {
3269                                 s390_lhi  (code, ins->dreg, ins->inst_c0);
3270                         } else {
3271                                 s390_basr (code, s390_r13, 0);
3272                                 s390_j    (code, 4);
3273                                 s390_word (code, ins->inst_c0);
3274                                 s390_l    (code, ins->dreg, 0, s390_r13, 4);
3275                         }
3276                 }
3277                         break;
3278                 case OP_AOTCONST: {
3279                         s390_basr (code, s390_r13, 0);
3280                         s390_j    (code, 4);
3281                         mono_add_patch_info (cfg, code - cfg->native_code,
3282                                 (MonoJumpInfoType)ins->inst_i1, ins->inst_p0);
3283                         s390_word (code, 0);
3284                         s390_l    (code,ins->dreg, 0, s390_r13, 4);
3285                 }
3286                         break;
3287                 case CEE_CONV_I4:
3288                 case CEE_CONV_U4:
3289                 case OP_MOVE: {
3290                         if (ins->dreg != ins->sreg1) {
3291                                 s390_lr (code, ins->dreg, ins->sreg1);
3292                         }
3293                 }
3294                         break;
3295                 case OP_SETLRET: {
3296                         int saved = ins->sreg1;
3297                         if (ins->sreg1 == s390_r2) {
3298                                 s390_lr (code, s390_r0, ins->sreg1);
3299                                 saved = s390_r0;
3300                         }
3301                         if (ins->sreg2 != s390_r2)
3302                                 s390_lr (code, s390_r2, ins->sreg2);
3303                         if (saved != s390_r3)
3304                                 s390_lr (code, s390_r3, saved);
3305                         break;
3306                 }
3307                 case OP_FMOVE: {
3308                         if (ins->dreg != ins->sreg1) {
3309                                 s390_ldr   (code, ins->dreg, ins->sreg1);
3310                         }
3311                 }
3312                         break;
3313                 case OP_S390_SETF4RET: {
3314                         s390_ledbr (code, ins->dreg, ins->sreg1);
3315                 }
3316                         break;
3317                 case OP_TLS_GET: {
3318                         if (s390_is_imm16 (ins->inst_offset)) {
3319                                 s390_lhi (code, s390_r13, ins->inst_offset);
3320                         } else {
3321                                 s390_bras (code, s390_r13, 0);
3322                                 s390_j    (code, 4);
3323                                 s390_word (code, ins->inst_offset);
3324                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3325                         }
3326                         s390_ear (code, s390_r1, 0);
3327                         s390_l   (code, ins->dreg, s390_r13, s390_r1, 0);
3328                 }
3329                         break;
3330                 case OP_FCONV_TO_R4: {
3331                         NOT_IMPLEMENTED;
3332                         next = mono_inst_list_next (&ins->node, &bb->ins_list);
3333                         if ((next) &&
3334                              (next->opcode != OP_FMOVE) &&
3335                              (next->opcode != OP_STORER4_MEMBASE_REG))
3336                                 s390_ledbr (code, ins->dreg, ins->sreg1);
3337                 }
3338                         break;
3339                 case OP_JMP: {
3340                         if (cfg->method->save_lmf)
3341                                 restoreLMF(code, cfg->frame_reg, cfg->stack_usage);
3342
3343                         if (cfg->flags & MONO_CFG_HAS_TAIL) {
3344                                 code = emit_load_volatile_registers(code, cfg);
3345                         }
3346
3347                         code = backUpStackPtr(cfg, code, STK_BASE);
3348                         s390_l   (code, s390_r14, 0, STK_BASE, S390_RET_ADDR_OFFSET);
3349                         mono_add_patch_info (cfg, code - cfg->native_code,
3350                                              MONO_PATCH_INFO_METHOD_JUMP,
3351                                              ins->inst_p0);
3352                         s390_jcl (code, S390_CC_UN, 0);
3353                 }
3354                         break;
3355                 case OP_CHECK_THIS: {
3356                         /* ensure ins->sreg1 is not NULL */
3357                         s390_icm (code, s390_r0, 15, ins->sreg1, 0);
3358                 }
3359                         break;
3360                 case OP_ARGLIST: {
3361                         int offset = cfg->sig_cookie + cfg->stack_usage;
3362
3363                         if (s390_is_imm16 (offset))
3364                                 s390_lhi  (code, s390_r0, offset);
3365                         else {
3366                                 s390_basr (code, s390_r13, 0);
3367                                 s390_j    (code, 4);
3368                                 s390_word (code, offset);
3369                                 s390_l    (code, s390_r0, 0, s390_r13, 0);
3370                         }
3371                         s390_ar   (code, s390_r0, cfg->frame_reg);
3372                         s390_st   (code, s390_r0, 0, ins->sreg1, 0);
3373                 }
3374                         break;
3375                 case OP_FCALL: {
3376                         call = (MonoCallInst*)ins;
3377                         if (ins->flags & MONO_INST_HAS_METHOD)
3378                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_METHOD,
3379                                                      call->method);
3380                         else
3381                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS,
3382                                                      call->fptr);
3383                         s390_brasl (code, s390_r14, 0);
3384                         if (call->signature->ret->type == MONO_TYPE_R4)
3385                                 s390_ldebr (code, s390_f0, s390_f0);
3386                 }
3387                         break;
3388                 case OP_LCALL:
3389                 case OP_VCALL:
3390                 case OP_VOIDCALL:
3391                 case CEE_CALL: {
3392                         call = (MonoCallInst*)ins;
3393                         if (ins->flags & MONO_INST_HAS_METHOD)
3394                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_METHOD, call->method);
3395                         else
3396                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS, call->fptr);
3397                         s390_brasl (code, s390_r14, 0);
3398                 }
3399                         break;
3400                 case OP_FCALL_REG: {
3401                         call = (MonoCallInst*)ins;
3402                         s390_lr   (code, s390_r1, ins->sreg1);
3403                         s390_basr (code, s390_r14, s390_r1);
3404                         if (call->signature->ret->type == MONO_TYPE_R4)
3405                                 s390_ldebr (code, s390_f0, s390_f0);
3406                 }
3407                         break;
3408                 case OP_LCALL_REG:
3409                 case OP_VCALL_REG:
3410                 case OP_VOIDCALL_REG:
3411                 case OP_CALL_REG: {
3412                         s390_lr   (code, s390_r1, ins->sreg1);
3413                         s390_basr (code, s390_r14, s390_r1);
3414                 }
3415                         break;
3416                 case OP_FCALL_MEMBASE: {
3417                         call = (MonoCallInst*)ins;
3418                         s390_l    (code, s390_r1, 0, ins->sreg1, ins->inst_offset);
3419                         s390_basr (code, s390_r14, s390_r1);
3420                         if (call->signature->ret->type == MONO_TYPE_R4)
3421                                 s390_ldebr (code, s390_f0, s390_f0);
3422                 }
3423                         break;
3424                 case OP_LCALL_MEMBASE:
3425                 case OP_VCALL_MEMBASE:
3426                 case OP_VOIDCALL_MEMBASE:
3427                 case OP_CALL_MEMBASE: {
3428                         s390_l    (code, s390_r1, 0, ins->sreg1, ins->inst_offset);
3429                         s390_basr (code, s390_r14, s390_r1);
3430                 }
3431                         break;
3432                 case OP_OUTARG:
3433                         g_assert_not_reached ();
3434                         break;
3435                 case OP_LOCALLOC: {
3436                         /*------------------------------------------*/
3437                         /* To allocate space on the stack we have   */
3438                         /* to allow room for parameters passed in   */
3439                         /* calls, the backchain pointer and round   */
3440                         /* it to our stack alignment requirements   */
3441                         /*------------------------------------------*/
3442                         int alloca_skip = S390_MINIMAL_STACK_SIZE + cfg->param_area;
3443                         int area_offset = S390_ALIGN(alloca_skip, S390_STACK_ALIGNMENT);
3444                         s390_lr   (code, s390_r1, ins->sreg1);
3445                         if (ins->flags & MONO_INST_INIT)
3446                                 s390_lr   (code, s390_r0, ins->sreg1);
3447                         s390_ahi  (code, s390_r1, 14);
3448                         s390_srl  (code, s390_r1, 0, 3);
3449                         s390_sll  (code, s390_r1, 0, 3);
3450                         if (cfg->method->save_lmf) {
3451                                 /*----------------------------------*/
3452                                 /* we have to adjust lmf ebp value  */
3453                                 /*----------------------------------*/
3454                                 int lmfOffset = cfg->stack_usage - sizeof(MonoLMF);
3455
3456                                 s390_lr (code, s390_r13, cfg->frame_reg);
3457                                 if (s390_is_uimm16(lmfOffset))
3458                                         s390_ahi   (code, s390_r13, lmfOffset);
3459                                 else {
3460                                         s390_basr (code, s390_r14, 0);
3461                                         s390_j    (code, 4);
3462                                         s390_word (code, lmfOffset);
3463                                         s390_a    (code, s390_r13, 0, s390_r14, 4);
3464                                 }
3465                                 s390_lr (code, s390_r14, STK_BASE);
3466                                 s390_sr (code, s390_r14, s390_r1);
3467                                 s390_st (code, s390_r14, 0, s390_r13,
3468                                          G_STRUCT_OFFSET(MonoLMF, ebp));
3469                         }
3470                         s390_l    (code, s390_r13, 0, STK_BASE, 0);
3471                         s390_sr   (code, STK_BASE, s390_r1);
3472                         s390_st   (code, s390_r13, 0, STK_BASE, 0);
3473                         s390_la   (code, ins->dreg, 0, STK_BASE, area_offset);
3474                         s390_srl  (code, ins->dreg, 0, 3);
3475                         s390_sll  (code, ins->dreg, 0, 3);
3476                         if (ins->flags & MONO_INST_INIT) {
3477                                 s390_lr   (code, s390_r1, s390_r0);
3478                                 s390_lr   (code, s390_r0, ins->dreg);
3479                                 s390_lr   (code, s390_r14, s390_r12);
3480                                 s390_lhi  (code, s390_r13, 0);
3481                                 s390_mvcle(code, s390_r0, s390_r12, 0, 0);
3482                                 s390_jo   (code, -2);
3483                                 s390_lr   (code, s390_r12, s390_r14);
3484                         }
3485                 }
3486                         break;
3487                 case CEE_RET: {
3488                         s390_br  (code, s390_r14);
3489                 }
3490                         break;
3491                 case OP_THROW: {
3492                         s390_lr (code, s390_r2, ins->sreg1);
3493                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD,
3494                                              (gpointer)"mono_arch_throw_exception");
3495                         s390_brasl (code, s390_r14, 0);
3496                 }
3497                         break;
3498                 case OP_RETHROW: {
3499                         s390_lr (code, s390_r2, ins->sreg1);
3500                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD,
3501                                              (gpointer)"mono_arch_rethrow_exception");
3502                         s390_brasl (code, s390_r14, 0);
3503                 }
3504                         break;
3505                 case OP_START_HANDLER: {
3506                         if (s390_is_uimm12 (ins->inst_left->inst_offset)) {
3507                                 s390_st   (code, s390_r14, 0,
3508                                            ins->inst_left->inst_basereg,
3509                                            ins->inst_left->inst_offset);
3510                         } else {
3511                                 s390_basr (code, s390_r13, 0);
3512                                 s390_j    (code, 4);
3513                                 s390_word (code, ins->inst_left->inst_offset);
3514                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3515                                 s390_st   (code, s390_r14, s390_r13,
3516                                            ins->inst_left->inst_basereg, 0);
3517                         }
3518                 }
3519                         break;
3520                 case OP_ENDFILTER: {
3521                         if (ins->sreg1 != s390_r2)
3522                                 s390_lr (code, s390_r2, ins->sreg1);
3523                         if (s390_is_uimm12 (ins->inst_left->inst_offset)) {
3524                                 s390_l  (code, s390_r14, 0, ins->inst_left->inst_basereg,
3525                                          ins->inst_left->inst_offset);
3526                         } else {
3527                                 s390_basr (code, s390_r13, 0);
3528                                 s390_j    (code, 4);
3529                                 s390_word (code, ins->inst_left->inst_offset);
3530                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3531                                 s390_l    (code, s390_r14, s390_r13,
3532                                            ins->inst_left->inst_basereg, 0);
3533                         }
3534                         s390_br  (code, s390_r14);
3535                 }
3536                         break;
3537                 case OP_ENDFINALLY: {
3538                         if (s390_is_uimm12 (ins->inst_left->inst_offset)) {
3539                                 s390_l  (code, s390_r14, 0, ins->inst_left->inst_basereg,
3540                                          ins->inst_left->inst_offset);
3541                         } else {
3542                                 s390_basr (code, s390_r13, 0);
3543                                 s390_j    (code, 4);
3544                                 s390_word (code, ins->inst_left->inst_offset);
3545                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3546                                 s390_l    (code, s390_r14, s390_r13,
3547                                            ins->inst_left->inst_basereg, 0);
3548                         }
3549                         s390_br  (code, s390_r14);
3550                 }
3551                         break;
3552                 case OP_CALL_HANDLER: {
3553                         mono_add_patch_info (cfg, code-cfg->native_code,
3554                                              MONO_PATCH_INFO_BB, ins->inst_target_bb);
3555                         s390_brasl (code, s390_r14, 0);
3556                 }
3557                         break;
3558                 case OP_LABEL: {
3559                         ins->inst_c0 = code - cfg->native_code;
3560                 }
3561                         break;
3562                 case OP_BR:
3563                         EMIT_UNCOND_BRANCH(ins);
3564                         break;
3565                 case OP_BR_REG: {
3566                         s390_br  (code, ins->sreg1);
3567                 }
3568                         break;
3569                 case OP_CEQ: {
3570                         s390_lhi (code, ins->dreg, 1);
3571                         s390_jz  (code, 4);
3572                         s390_lhi (code, ins->dreg, 0);
3573                 }
3574                         break;
3575                 case OP_CLT: {
3576                         s390_lhi (code, ins->dreg, 1);
3577                         s390_jl  (code, 4);
3578                         s390_lhi (code, ins->dreg, 0);
3579                 }
3580                         break;
3581                 case OP_CLT_UN: {
3582                         s390_lhi (code, ins->dreg, 1);
3583                         s390_jlo (code, 4);
3584                         s390_lhi (code, ins->dreg, 0);
3585                 }
3586                         break;
3587                 case OP_CGT: {
3588                         s390_lhi (code, ins->dreg, 1);
3589                         s390_jh  (code, 4);
3590                         s390_lhi (code, ins->dreg, 0);
3591                 }
3592                         break;
3593                 case OP_CGT_UN: {
3594                         s390_lhi (code, ins->dreg, 1);
3595                         s390_jho (code, 4);
3596                         s390_lhi (code, ins->dreg, 0);
3597                 }
3598                         break;
3599                 case OP_COND_EXC_EQ:
3600                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_EQ, ins->inst_p1);
3601                         break;
3602                 case OP_COND_EXC_NE_UN:
3603                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NE, ins->inst_p1);
3604                         break;
3605                 case OP_COND_EXC_LT:
3606                 case OP_COND_EXC_LT_UN:
3607                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, ins->inst_p1);
3608                         break;
3609                 case OP_COND_EXC_GT:
3610                 case OP_COND_EXC_GT_UN:
3611                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GT, ins->inst_p1);
3612                         break;
3613                 case OP_COND_EXC_GE:
3614                 case OP_COND_EXC_GE_UN:
3615                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GE, ins->inst_p1);
3616                         break;
3617                 case OP_COND_EXC_LE:
3618                 case OP_COND_EXC_LE_UN:
3619                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LE, ins->inst_p1);
3620                         break;
3621                 case OP_COND_EXC_OV:
3622                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, ins->inst_p1);
3623                         break;
3624                 case OP_COND_EXC_NO:
3625                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NO, ins->inst_p1);
3626                         break;
3627                 case OP_COND_EXC_C:
3628                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, ins->inst_p1);
3629                         break;
3630                 case OP_COND_EXC_NC:
3631                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, ins->inst_p1);
3632                         break;
3633                 case CEE_BEQ:
3634                         EMIT_COND_BRANCH (ins, S390_CC_EQ);
3635                         break;
3636                 case CEE_BNE_UN:
3637                         EMIT_COND_BRANCH (ins, S390_CC_NE);
3638                         break;
3639                 case CEE_BLT:
3640                 case CEE_BLT_UN:
3641                         EMIT_COND_BRANCH (ins, S390_CC_LT);
3642                         break;
3643                 case CEE_BGT:
3644                 case CEE_BGT_UN:
3645                         EMIT_COND_BRANCH (ins, S390_CC_GT);
3646                         break;
3647                 case CEE_BGE:
3648                 case CEE_BGE_UN:
3649                         EMIT_COND_BRANCH (ins, S390_CC_GE);
3650                         break;
3651                 case CEE_BLE:
3652                 case CEE_BLE_UN:
3653                         EMIT_COND_BRANCH (ins, S390_CC_LE);
3654                         break;
3655
3656                 /* floating point opcodes */
3657                 case OP_R8CONST: {
3658                         if (*((float *) ins->inst_p0) == 0) {
3659                                 s390_lzdr (code, ins->dreg);
3660                         } else {
3661                                 s390_basr  (code, s390_r13, 0);
3662                                 s390_j     (code, 4);
3663                                 s390_word  (code, ins->inst_p0);
3664                                 s390_l     (code, s390_r13, 0, s390_r13, 4);
3665                                 s390_ld    (code, ins->dreg, 0, s390_r13, 0);
3666                         }
3667                 }
3668                         break;
3669                 case OP_R4CONST: {
3670                         if (*((float *) ins->inst_p0) == 0) {
3671                                 s390_lzdr (code, ins->dreg);
3672                         } else {
3673                                 s390_basr (code, s390_r13, 0);
3674                                 s390_j    (code, 4);
3675                                 s390_word (code, ins->inst_p0);
3676                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3677                                 s390_ldeb (code, ins->dreg, 0, s390_r13, 0);
3678                         }
3679                 }
3680                         break;
3681                 case OP_STORER8_MEMBASE_REG: {
3682                         if (s390_is_uimm12(ins->inst_offset)) {
3683                                 s390_std  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
3684                         } else {
3685                                 s390_basr (code, s390_r13, 0);
3686                                 s390_j    (code, 4);
3687                                 s390_word (code, ins->inst_offset);
3688                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3689                                 s390_std  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
3690                         }
3691                 }
3692                         break;
3693                 case OP_LOADR8_MEMBASE: {
3694                         if (s390_is_uimm12(ins->inst_offset)) {
3695                                 s390_ld   (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
3696                         } else {
3697                                 s390_basr (code, s390_r13, 0);
3698                                 s390_j    (code, 4);
3699                                 s390_word (code, ins->inst_offset);
3700                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3701                                 s390_ld   (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
3702                         }
3703                 }
3704                         break;
3705                 case OP_STORER4_MEMBASE_REG: {
3706                         if (s390_is_uimm12(ins->inst_offset)) {
3707                                 s390_ledbr(code, s390_f15, ins->sreg1);
3708                                 s390_ste  (code, s390_f15, 0, ins->inst_destbasereg, ins->inst_offset);
3709                         } else {
3710                                 s390_basr (code, s390_r13, 0);
3711                                 s390_j    (code, 4);
3712                                 s390_word (code, ins->inst_offset);
3713                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3714                                 s390_ledbr(code, s390_f15, ins->sreg1);
3715                                 s390_ste  (code, s390_f15, s390_r13, ins->inst_destbasereg, 0);
3716                         }
3717                 }
3718                         break;
3719                 case OP_LOADR4_MEMBASE: {
3720                         if (s390_is_uimm12(ins->inst_offset)) {
3721                                 s390_ldeb (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
3722                         } else {
3723                                 s390_basr (code, s390_r13, 0);
3724                                 s390_j    (code, 4);
3725                                 s390_word (code, ins->inst_offset);
3726                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3727                                 s390_ldeb (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
3728                         }
3729                 }
3730                         break;
3731                 case CEE_CONV_R_UN: {
3732                         s390_cdfbr (code, ins->dreg, ins->sreg1);
3733                         s390_ltr   (code, ins->sreg1, ins->sreg1);
3734                         s390_jnl   (code, 12);
3735                         s390_basr  (code, s390_r13, 0);
3736                         s390_j     (code, 6);
3737                         s390_word  (code, 0x41f00000);
3738                         s390_word  (code, 0);
3739                         s390_adb   (code, ins->dreg, 0, s390_r13, 4);
3740                 }
3741                         break;
3742                 case CEE_CONV_R4: {
3743                         s390_cdfbr (code, ins->dreg, ins->sreg1);
3744                 }
3745                         break;
3746                 case CEE_CONV_R8: {
3747                         s390_cdfbr (code, ins->dreg, ins->sreg1);
3748                 }
3749                         break;
3750                 case OP_FCONV_TO_I1:
3751                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 1, TRUE);
3752                         break;
3753                 case OP_FCONV_TO_U1:
3754                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 1, FALSE);
3755                         break;
3756                 case OP_FCONV_TO_I2:
3757                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 2, TRUE);
3758                         break;
3759                 case OP_FCONV_TO_U2:
3760                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 2, FALSE);
3761                         break;
3762                 case OP_FCONV_TO_I4:
3763                 case OP_FCONV_TO_I:
3764                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 4, TRUE);
3765                         break;
3766                 case OP_FCONV_TO_U4:
3767                 case OP_FCONV_TO_U:
3768                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 4, FALSE);
3769                         break;
3770                 case OP_FCONV_TO_I8:
3771                 case OP_FCONV_TO_U8:
3772                         g_assert_not_reached ();
3773                         /* Implemented as helper calls */
3774                         break;
3775                 case OP_LCONV_TO_R_UN:
3776                         g_assert_not_reached ();
3777                         /* Implemented as helper calls */
3778                         break;
3779                 case OP_LCONV_TO_OVF_I: {
3780                         /* Valid ints: 0xffffffff:8000000 to 00000000:0x7f000000 */
3781                         short int *o[5];
3782                         s390_ltr  (code, ins->sreg1, ins->sreg1);
3783                         s390_jnl  (code, 0); CODEPTR(code, o[0]);
3784                         s390_ltr  (code, ins->sreg2, ins->sreg2);
3785                         s390_jnl  (code, 0); CODEPTR(code, o[1]);
3786                         s390_lhi  (code, s390_r13, -1);
3787                         s390_cr   (code, ins->sreg2, s390_r13);
3788                         s390_jnz  (code, 0); CODEPTR(code, o[2]);
3789                         if (ins->dreg != ins->sreg1)
3790                                 s390_lr   (code, ins->dreg, ins->sreg1);
3791                         s390_j    (code, 0); CODEPTR(code, o[3]);
3792                         PTRSLOT(code, o[0]);
3793                         s390_ltr  (code, ins->sreg2, ins->sreg2);
3794                         s390_jz   (code, 0); CODEPTR(code, o[4]);
3795                         PTRSLOT(code, o[1]);
3796                         PTRSLOT(code, o[2]);
3797                         mono_add_patch_info (cfg, code - cfg->native_code,
3798                                              MONO_PATCH_INFO_EXC, "OverflowException");
3799                         s390_brasl (code, s390_r14, 0);
3800                         PTRSLOT(code, o[3]);
3801                         PTRSLOT(code, o[4]);
3802                 }
3803                         break;
3804                 case OP_SQRT: {
3805                         s390_sqdbr (code, ins->dreg, ins->sreg1);
3806                 }
3807                         break;
3808                 case OP_FADD: {
3809                         CHECK_SRCDST_COM_F;
3810                         s390_adbr (code, ins->dreg, src2);
3811                 }
3812                         break;
3813                 case OP_FSUB: {
3814                         CHECK_SRCDST_NCOM_F;
3815                         s390_sdbr (code, ins->dreg, src2);
3816                 }
3817                         break;
3818                 case OP_FMUL: {
3819                         CHECK_SRCDST_COM_F;
3820                         s390_mdbr (code, ins->dreg, src2);
3821                 }
3822                         break;
3823                 case OP_FDIV: {
3824                         CHECK_SRCDST_NCOM_F;
3825                         s390_ddbr (code, ins->dreg, src2);
3826                 }
3827                         break;
3828                 case OP_FNEG: {
3829                         s390_lcdbr (code, ins->dreg, ins->sreg1);
3830                 }
3831                         break;
3832                 case OP_FREM: {
3833                         CHECK_SRCDST_NCOM_F;
3834                         s390_didbr (code, ins->dreg, src2, 5, s390_f15);
3835                 }
3836                         break;
3837                 case OP_FCOMPARE: {
3838                         s390_cdbr (code, ins->sreg1, ins->sreg2);
3839                 }
3840                         break;
3841                 case OP_FCEQ: {
3842                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3843                         s390_lhi   (code, ins->dreg, 1);
3844                         s390_je    (code, 4);
3845                         s390_lhi   (code, ins->dreg, 0);
3846                 }
3847                         break;
3848                 case OP_FCLT: {
3849                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3850                         s390_lhi   (code, ins->dreg, 1);
3851                         s390_jl    (code, 4);
3852                         s390_lhi   (code, ins->dreg, 0);
3853                 }
3854                         break;
3855                 case OP_FCLT_UN: {
3856                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3857                         s390_lhi   (code, ins->dreg, 1);
3858                         s390_jlo   (code, 4);
3859                         s390_lhi   (code, ins->dreg, 0);
3860                 }
3861                         break;
3862                 case OP_FCGT: {
3863                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3864                         s390_lhi   (code, ins->dreg, 1);
3865                         s390_jh    (code, 4);
3866                         s390_lhi   (code, ins->dreg, 0);
3867                 }
3868                         break;
3869                 case OP_FCGT_UN: {
3870                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3871                         s390_lhi   (code, ins->dreg, 1);
3872                         s390_jho   (code, 4);
3873                         s390_lhi   (code, ins->dreg, 0);
3874                 }
3875                         break;
3876                 case OP_FBEQ: {
3877                         short *o;
3878                         s390_jo (code, 0); CODEPTR(code, o);
3879                         EMIT_COND_BRANCH (ins, S390_CC_EQ);
3880                         PTRSLOT(code, o);
3881                 }
3882                         break;
3883                 case OP_FBNE_UN:
3884                         EMIT_COND_BRANCH (ins, S390_CC_NE|S390_CC_OV);
3885                         break;
3886                 case OP_FBLT: {
3887                         short *o;
3888                         s390_jo (code, 0); CODEPTR(code, o);
3889                         EMIT_COND_BRANCH (ins, S390_CC_LT);
3890                         PTRSLOT(code, o);
3891                 }
3892                         break;
3893                 case OP_FBLT_UN:
3894                         EMIT_COND_BRANCH (ins, S390_CC_LT|S390_CC_OV);
3895                         break;
3896                 case OP_FBGT: {
3897                         short *o;
3898                         s390_jo (code, 0); CODEPTR(code, o);
3899                         EMIT_COND_BRANCH (ins, S390_CC_GT);
3900                         PTRSLOT(code, o);
3901                 }
3902                         break;
3903                 case OP_FBGT_UN:
3904                         EMIT_COND_BRANCH (ins, S390_CC_GT|S390_CC_OV);
3905                         break;
3906                 case OP_FBGE: {
3907                         short *o;
3908                         s390_jo (code, 0); CODEPTR(code, o);
3909                         EMIT_COND_BRANCH (ins, S390_CC_GE);
3910                         PTRSLOT(code, o);
3911                 }
3912                         break;
3913                 case OP_FBGE_UN:
3914                         EMIT_COND_BRANCH (ins, S390_CC_GE|S390_CC_OV);
3915                         break;
3916                 case OP_FBLE: {
3917                         short *o;
3918                         s390_jo (code, 0); CODEPTR(code, o);
3919                         EMIT_COND_BRANCH (ins, S390_CC_LE);
3920                         PTRSLOT(code, o);
3921                 }
3922                         break;
3923                 case OP_FBLE_UN:
3924                         EMIT_COND_BRANCH (ins, S390_CC_LE|S390_CC_OV);
3925                         break;
3926                 case OP_CKFINITE: {
3927                         short *o;
3928                         s390_lhi  (code, s390_r13, 0x7f);
3929                         s390_tcdb (code, ins->sreg1, 0, s390_r13, 0);
3930                         s390_jz   (code, 0); CODEPTR(code, o);
3931                         mono_add_patch_info (cfg, code - cfg->native_code,
3932                                              MONO_PATCH_INFO_EXC, "ArithmeticException");
3933                         s390_brasl (code, s390_r14,0);
3934                         PTRSLOT(code, o);
3935                 }
3936                         break;
3937                 case OP_S390_MOVE: {
3938                         if (ins->backend.size > 0) {
3939                                 if (ins->backend.size <= 256) {
3940                                         s390_mvc  (code, ins->backend.size, ins->dreg,
3941                                                    ins->inst_offset, ins->sreg1, ins->inst_imm);
3942                                 } else {
3943                                         s390_lr   (code, s390_r0, ins->dreg);
3944                                         if (s390_is_imm16 (ins->inst_offset)) {
3945                                                 s390_ahi  (code, s390_r0, ins->inst_offset);
3946                                         } else {
3947                                                 s390_basr (code, s390_r13, 0);
3948                                                 s390_j    (code, 4);
3949                                                 s390_word (code, ins->inst_offset);
3950                                                 s390_a    (code, s390_r0, 0, s390_r13, 4);
3951                                         }
3952                                         s390_lr   (code, s390_r14, s390_r12);
3953                                         s390_lr   (code, s390_r12, ins->sreg1);
3954                                         if (s390_is_imm16 (ins->inst_imm)) {
3955                                                 s390_ahi  (code, s390_r12, ins->inst_imm);
3956                                         } else {
3957                                                 s390_basr (code, s390_r13, 0);
3958                                                 s390_j    (code, 4);
3959                                                 s390_word (code, ins->inst_imm);
3960                                                 s390_a    (code, s390_r12, 0, s390_r13, 4);
3961                                         }
3962                                         s390_lr   (code, s390_r1, ins->sreg1);
3963                                         s390_lr   (code, s390_r13, s390_r1);
3964                                         s390_mvcle(code, s390_r0, s390_r12, 0, 0);
3965                                         s390_jo   (code, -2);
3966                                         s390_lr   (code, s390_r12, s390_r14);
3967                                 }
3968                         }
3969                 }
3970                         break;
3971                 case OP_ATOMIC_ADD_I4: {
3972                         s390_lr  (code, s390_r1, ins->sreg2);
3973                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
3974                         s390_a   (code, s390_r1, 0, ins->inst_basereg, ins->inst_offset);
3975                         s390_cs  (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
3976                         s390_jnz (code, -7);
3977                         s390_lr  (code, ins->dreg, s390_r1);
3978                 }
3979                         break;
3980                 case OP_ATOMIC_ADD_NEW_I4: {
3981                         s390_lr  (code, s390_r1, ins->sreg2);
3982                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
3983                         s390_a   (code, s390_r1, 0, ins->inst_basereg, ins->inst_offset);
3984                         s390_cs  (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
3985                         s390_jnz (code, -7);
3986                         s390_lr  (code, ins->dreg, s390_r1);
3987                 }
3988                         break;
3989                 case OP_ATOMIC_EXCHANGE_I4: {
3990                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
3991                         s390_cs  (code, s390_r0, ins->sreg2, ins->inst_basereg, ins->inst_offset);
3992                         s390_jnz (code, -4);
3993                         s390_lr  (code, ins->dreg, s390_r0);
3994                 }
3995                         break;
3996                 case OP_S390_BKCHAIN: {
3997                         s390_lr  (code, ins->dreg, ins->sreg1);
3998                         if (s390_is_imm16 (cfg->stack_offset)) {
3999                                 s390_ahi (code, ins->dreg, cfg->stack_offset);
4000                         } else {
4001                                 s390_basr (code, s390_r13, 0);
4002                                 s390_j    (code, 6);
4003                                 s390_word (code, cfg->stack_offset);
4004                                 s390_a    (code, ins->dreg, 0, s390_r13, 4);
4005                         }
4006                 }
4007                 case OP_MEMORY_BARRIER: {
4008                 }
4009                         break;
4010                 default:
4011                         g_warning ("unknown opcode %s in %s()\n", mono_inst_name (ins->opcode), __FUNCTION__);
4012                         g_assert_not_reached ();
4013                 }
4014
4015                 if ((cfg->opt & MONO_OPT_BRANCH) && ((code - cfg->native_code - offset) > max_len)) {
4016                         g_warning ("wrong maximal instruction length of instruction %s (expected %d, got %d)",
4017                                    mono_inst_name (ins->opcode), max_len, code - cfg->native_code - offset);
4018                         g_assert_not_reached ();
4019                 }
4020
4021                 cpos += max_len;
4022
4023                 last_offset = offset;
4024         }
4025
4026         cfg->code_len = code - cfg->native_code;
4027 }
4028
4029 /*========================= End of Function ========================*/
4030
4031 /*------------------------------------------------------------------*/
4032 /*                                                                  */
4033 /* Name         - mono_arch_register_lowlevel_calls                 */
4034 /*                                                                  */
4035 /* Function     - Register routines to help with --trace operation. */
4036 /*                                                                  */
4037 /*------------------------------------------------------------------*/
4038
4039 void
4040 mono_arch_register_lowlevel_calls (void)
4041 {
4042         mono_register_jit_icall (mono_arch_get_lmf_addr, "mono_arch_get_lmf_addr", NULL, TRUE);
4043 }
4044
4045 /*========================= End of Function ========================*/
4046
4047 /*------------------------------------------------------------------*/
4048 /*                                                                  */
4049 /* Name         - mono_arch_patch_code                              */
4050 /*                                                                  */
4051 /* Function     - Process the patch data created during the         */
4052 /*                instruction build process. This resolves jumps,   */
4053 /*                calls, variables etc.                             */
4054 /*                                                                  */
4055 /*------------------------------------------------------------------*/
4056
4057 void
4058 mono_arch_patch_code (MonoMethod *method, MonoDomain *domain,
4059                       guint8 *code, MonoJumpInfo *ji, gboolean run_cctors)
4060 {
4061         MonoJumpInfo *patch_info;
4062
4063         for (patch_info = ji; patch_info; patch_info = patch_info->next) {
4064                 unsigned char *ip = patch_info->ip.i + code;
4065                 gconstpointer target = NULL;
4066
4067                 target = mono_resolve_patch_target (method, domain, code,
4068                                                     patch_info, run_cctors);
4069
4070                 switch (patch_info->type) {
4071                         case MONO_PATCH_INFO_IP:
4072                         case MONO_PATCH_INFO_EXC_NAME:
4073                         case MONO_PATCH_INFO_LDSTR:
4074                         case MONO_PATCH_INFO_TYPE_FROM_HANDLE:
4075                         case MONO_PATCH_INFO_LDTOKEN:
4076                         case MONO_PATCH_INFO_EXC:
4077                                 continue;
4078                         case MONO_PATCH_INFO_SWITCH:
4079                                 /*----------------------------------*/
4080                                 /* ip points at the basr r13,0/j +4 */
4081                                 /* instruction the vtable value     */
4082                                 /* follows this (i.e. ip+6)         */
4083                                 /*----------------------------------*/
4084                                 *((gconstpointer *)(ip+6)) = target;
4085                                 target = NULL;
4086                                 continue;
4087                         case MONO_PATCH_INFO_METHODCONST:
4088                         case MONO_PATCH_INFO_CLASS:
4089                         case MONO_PATCH_INFO_IMAGE:
4090                         case MONO_PATCH_INFO_FIELD:
4091                         case MONO_PATCH_INFO_IID:
4092                                 target = S390_RELATIVE(target, ip);
4093                                 continue;
4094                         case MONO_PATCH_INFO_R4:
4095                         case MONO_PATCH_INFO_R8:
4096                         case MONO_PATCH_INFO_METHOD_REL:
4097                                 g_assert_not_reached ();
4098                                 continue;
4099                         default:
4100                                 target = S390_RELATIVE(target, ip);
4101                                 ip += 2;
4102                 }
4103                 s390_patch (ip, (guint32) target);
4104         }
4105 }
4106
4107 /*========================= End of Function ========================*/
4108
4109 /*------------------------------------------------------------------*/
4110 /*                                                                  */
4111 /* Name         - emit_load_volatile_registers                      */
4112 /*                                                                  */
4113 /* Function     - Create the instruction sequence for loading the   */
4114 /*                parameter registers for use with the 'tail' op.   */
4115 /*                                                                  */
4116 /*                The register loading operations performed here    */
4117 /*                are the mirror of the store operations performed  */
4118 /*                in mono_arch_emit_prolog and need to be kept in   */
4119 /*                synchronization with it.                          */
4120 /*                                                                  */
4121 /*------------------------------------------------------------------*/
4122
4123 guint8 *
4124 emit_load_volatile_registers(guint8 * code, MonoCompile *cfg)
4125 {
4126         MonoMethod *method = cfg->method;
4127         MonoMethodSignature *sig;
4128         MonoInst *inst;
4129         int pos, i;
4130         CallInfo *cinfo;
4131         size_data sz;
4132
4133         sig = mono_method_signature (method);
4134         pos = 0;
4135
4136         cinfo = calculate_sizes (NULL, sig, &sz, sig->pinvoke);
4137
4138         if (cinfo->struct_ret) {
4139                 ArgInfo *ainfo = &cinfo->ret;
4140                 inst         = cfg->ret;
4141                 s390_l (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4142         }
4143
4144         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
4145                 ArgInfo *ainfo = cinfo->args + i;
4146                 inst = cfg->args [pos];
4147
4148                 if (inst->opcode == OP_REGVAR) {
4149                         if (ainfo->regtype == RegTypeGeneral)
4150                                 s390_lr (code, ainfo->reg, inst->dreg);
4151                         else if (ainfo->regtype == RegTypeFP) {
4152                                 if (inst->dreg != ainfo->reg) {
4153                                         if (ainfo->size == 4) {
4154                                                 s390_ldebr (code, ainfo->reg, inst->dreg);
4155                                         } else {
4156                                                 s390_ldr   (code, ainfo->reg, inst->dreg);
4157                                         }
4158                                 }
4159                         }
4160                         else if (ainfo->regtype == RegTypeBase) {
4161                         } else
4162                                 g_assert_not_reached ();
4163                 } else {
4164                         if (ainfo->regtype == RegTypeGeneral) {
4165                                 if (!((ainfo->reg >= 2) && (ainfo->reg <= 6)))
4166                                         g_assert_not_reached();
4167                                 switch (ainfo->size) {
4168                                 case 1:
4169                                         s390_ic (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4170                                         break;
4171                                 case 2:
4172                                         s390_lh (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4173                                         break;
4174                                 case 8:
4175                                         s390_lm (code, ainfo->reg, ainfo->reg + 1,
4176                                                   inst->inst_basereg, inst->inst_offset);
4177                                         break;
4178                                 default:
4179                                         s390_l  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4180                                 }
4181                         } else if (ainfo->regtype == RegTypeBase) {
4182                         } else if (ainfo->regtype == RegTypeFP) {
4183                                 if (ainfo->size == 8)
4184                                         s390_ld (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4185                                 else if (ainfo->size == 4)
4186                                         s390_le (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4187                                 else
4188                                         g_assert_not_reached ();
4189                         } else if (ainfo->regtype == RegTypeStructByVal) {
4190                                 if (ainfo->reg != STK_BASE) {
4191                                         switch (ainfo->size) {
4192                                         case 1:
4193                                                 s390_ic (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4194                                                 break;
4195                                         case 2:
4196                                                 s390_lh (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4197                                                 break;
4198                                         case 4:
4199                                                 s390_l  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4200                                                 break;
4201                                         case 8:
4202                                                 s390_lm (code, ainfo->reg, ainfo->reg+1, inst->inst_basereg, inst->inst_offset);
4203                                                 break;
4204                                         }
4205                                 }
4206                         } else if (ainfo->regtype == RegTypeStructByAddr) {
4207                                 if (ainfo->reg != STK_BASE) {
4208                                         s390_l  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4209                                 }
4210                         } else
4211                                 g_assert_not_reached ();
4212                 }
4213                 pos++;
4214         }
4215
4216         g_free (cinfo);
4217
4218         return code;
4219 }
4220
4221 /*========================= End of Function ========================*/
4222
4223 /*------------------------------------------------------------------*/
4224 /*                                                                  */
4225 /* Name         - mono_arch_emit_prolog                             */
4226 /*                                                                  */
4227 /* Function     - Create the instruction sequence for a function    */
4228 /*                prolog.                                           */
4229 /*                                                                  */
4230 /*------------------------------------------------------------------*/
4231
4232 guint8 *
4233 mono_arch_emit_prolog (MonoCompile *cfg)
4234 {
4235         MonoMethod *method = cfg->method;
4236         MonoBasicBlock *bb;
4237         MonoMethodSignature *sig;
4238         MonoInst *inst;
4239         int alloc_size, pos, max_offset, i;
4240         guint8 *code;
4241         CallInfo *cinfo;
4242         size_data sz;
4243         int tracing = 0;
4244         int lmfOffset;                                                          \
4245
4246         if (mono_jit_trace_calls != NULL && mono_trace_eval (method))
4247                 tracing = 1;
4248
4249         cfg->code_size   = 512;
4250         cfg->native_code = code = g_malloc (cfg->code_size);
4251
4252         s390_stm  (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
4253
4254         if (cfg->flags & MONO_CFG_HAS_ALLOCA) {
4255                 cfg->used_int_regs |= 1 << 11;
4256         }
4257
4258         alloc_size = cfg->stack_offset;
4259
4260         cfg->stack_usage = alloc_size;
4261         s390_lr   (code, s390_r11, STK_BASE);
4262         if (s390_is_uimm16 (alloc_size)) {
4263                 s390_ahi  (code, STK_BASE, -alloc_size);
4264         } else {
4265                 int stackSize = alloc_size;
4266                 while (stackSize > 32767) {
4267                         s390_ahi  (code, STK_BASE, -32767);
4268                         stackSize -= 32767;
4269                 }
4270                 s390_ahi  (code, STK_BASE, -stackSize);
4271         }
4272         s390_st   (code, s390_r11, 0, STK_BASE, 0);
4273
4274         if (cfg->frame_reg != STK_BASE)
4275                 s390_lr (code, s390_r11, STK_BASE);
4276
4277         /* compute max_offset in order to use short forward jumps
4278          * we always do it on s390 because the immediate displacement
4279          * for jumps is too small
4280          */
4281         max_offset = 0;
4282         for (bb = cfg->bb_entry; bb; bb = bb->next_bb) {
4283                 MonoInst *ins;
4284                 bb->max_offset = max_offset;
4285
4286                 if (cfg->prof_options & MONO_PROFILE_COVERAGE)
4287                         max_offset += 6;
4288
4289                 MONO_BB_FOR_EACH_INS (bb, ins)
4290                         max_offset += ((guint8 *)ins_get_spec (ins->opcode))[MONO_INST_LEN];
4291         }
4292
4293         /* load arguments allocated to register from the stack */
4294         sig = mono_method_signature (method);
4295         pos = 0;
4296
4297         cinfo = calculate_sizes (cfg, sig, &sz, sig->pinvoke);
4298
4299         if (cinfo->struct_ret) {
4300                 ArgInfo *ainfo = &cinfo->ret;
4301                 inst         = cfg->ret;
4302                 inst->backend.size = ainfo->vtsize;
4303                 s390_st (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4304         }
4305
4306         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
4307                 ArgInfo *ainfo = cinfo->args + i;
4308                 inst = cfg->args [pos];
4309
4310                 if (inst->opcode == OP_REGVAR) {
4311                         if (ainfo->regtype == RegTypeGeneral)
4312                                 s390_lr (code, inst->dreg, ainfo->reg);
4313                         else if (ainfo->regtype == RegTypeFP) {
4314                                 if (inst->dreg != ainfo->reg) {
4315                                         if (ainfo->size == 4) {
4316                                                 s390_ledbr (code, inst->dreg, ainfo->reg);
4317                                         } else {
4318                                                 s390_ldr   (code, inst->dreg, ainfo->reg);
4319                                         }
4320                                 }
4321                         }
4322                         else if (ainfo->regtype == RegTypeBase) {
4323                                 s390_lr  (code, s390_r13, STK_BASE);
4324                                 s390_ahi (code, s390_r13, alloc_size);
4325                                 s390_l   (code, inst->dreg, 0, s390_r13, ainfo->offset);
4326                         } else
4327                                 g_assert_not_reached ();
4328
4329                         if (cfg->verbose_level > 2)
4330                                 g_print ("Argument %d assigned to register %s\n",
4331                                          pos, mono_arch_regname (inst->dreg));
4332                 } else {
4333                         if (ainfo->regtype == RegTypeGeneral) {
4334                                 if (!((ainfo->reg >= 2) && (ainfo->reg <= 6)))
4335                                         g_assert_not_reached();
4336                                 switch (ainfo->size) {
4337                                 case 1:
4338                                         s390_stc (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4339                                         break;
4340                                 case 2:
4341                                         s390_sth (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4342                                         break;
4343                                 case 8:
4344                                         s390_stm (code, ainfo->reg, ainfo->reg + 1,
4345                                                   inst->inst_basereg, inst->inst_offset);
4346                                         break;
4347                                 default:
4348                                         s390_st  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4349                                 }
4350                         } else if (ainfo->regtype == RegTypeBase) {
4351                         } else if (ainfo->regtype == RegTypeFP) {
4352                                 if (ainfo->size == 8)
4353                                         s390_std (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4354                                 else if (ainfo->size == 4)
4355                                         s390_ste (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4356                                 else
4357                                         g_assert_not_reached ();
4358                         } else if (ainfo->regtype == RegTypeStructByVal) {
4359                                 int doffset = inst->inst_offset;
4360                                 int reg;
4361                                 if (ainfo->reg != STK_BASE)
4362                                         reg = ainfo->reg;
4363                                 else {
4364                                         reg = s390_r0;
4365                                         s390_lr  (code, s390_r13, STK_BASE);
4366                                         s390_ahi (code, s390_r13, alloc_size);
4367                                 }
4368                                 switch (ainfo->size) {
4369                                         case 1:
4370                                                 if (ainfo->reg == STK_BASE)
4371                                                         s390_ic  (code, reg, 0, s390_r13, ainfo->offset+3);
4372                                                 s390_stc (code, reg, 0, inst->inst_basereg, doffset);
4373                                                 break;
4374                                         case 2:
4375                                                 if (ainfo->reg == STK_BASE)
4376                                                         s390_lh  (code, reg, 0, s390_r13, ainfo->offset+2);
4377                                                 s390_sth (code, reg, 0, inst->inst_basereg, doffset);
4378                                                 break;
4379                                         case 4:
4380                                                 if (ainfo->reg == STK_BASE)
4381                                                         s390_l   (code, reg, 0, s390_r13, ainfo->offset);
4382                                                 s390_st  (code, reg, 0, inst->inst_basereg, doffset);
4383                                                 break;
4384                                         case 8:
4385                                                 if (ainfo->reg == STK_BASE)
4386                                                         s390_lm  (code, s390_r0, s390_r1, s390_r13, ainfo->offset);
4387                                                 s390_stm (code, reg, reg+1, inst->inst_basereg, doffset);
4388                                                 break;
4389                                 }
4390                         } else if (ainfo->regtype == RegTypeStructByAddr) {
4391                                 if (ainfo->reg != STK_BASE)
4392                                         s390_st  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4393                         } else
4394                                 g_assert_not_reached ();
4395                 }
4396                 pos++;
4397         }
4398
4399         if (method->save_lmf) {
4400                 /*---------------------------------------------------------------*/
4401                 /* we build the MonoLMF structure on the stack - see mini-s390.h */
4402                 /*---------------------------------------------------------------*/
4403                 lmfOffset = alloc_size - sizeof(MonoLMF);
4404
4405                 s390_lr    (code, s390_r13, cfg->frame_reg);
4406                 if (s390_is_uimm16(lmfOffset))
4407                         s390_ahi   (code, s390_r13, lmfOffset);
4408                 else {
4409                         s390_basr (code, s390_r14, 0);
4410                         s390_j    (code, 4);
4411                         s390_word (code, lmfOffset);
4412                         s390_a    (code, s390_r13, 0, s390_r14, 4);
4413                 }
4414
4415                 /*---------------------------------------------------------------*/
4416                 /* Preserve the parameter registers while we fix up the lmf      */
4417                 /*---------------------------------------------------------------*/
4418                 s390_stm   (code, s390_r2, s390_r6, s390_r13,
4419                             G_STRUCT_OFFSET(MonoLMF, pregs[0]));
4420
4421                 /*---------------------------------------------------------------*/
4422                 /* On return from this call r2 have the address of the &lmf      */
4423                 /*---------------------------------------------------------------*/
4424                 mono_add_patch_info (cfg, code - cfg->native_code,
4425                                      MONO_PATCH_INFO_INTERNAL_METHOD,
4426                                      (gpointer)"mono_get_lmf_addr");
4427                 s390_brasl (code, s390_r14, 0);
4428
4429                 /*---------------------------------------------------------------*/
4430                 /* Set lmf.lmf_addr = jit_tls->lmf                               */
4431                 /*---------------------------------------------------------------*/
4432                 s390_st    (code, s390_r2, 0, s390_r13,
4433                             G_STRUCT_OFFSET(MonoLMF, lmf_addr));
4434
4435                 /*---------------------------------------------------------------*/
4436                 /* Get current lmf                                               */
4437                 /*---------------------------------------------------------------*/
4438                 s390_l     (code, s390_r0, 0, s390_r2, 0);
4439
4440                 /*---------------------------------------------------------------*/
4441                 /* Set our lmf as the current lmf                                */
4442                 /*---------------------------------------------------------------*/
4443                 s390_st    (code, s390_r13, 0, s390_r2, 0);
4444
4445                 /*---------------------------------------------------------------*/
4446                 /* Have our lmf.previous_lmf point to the last lmf               */
4447                 /*---------------------------------------------------------------*/
4448                 s390_st    (code, s390_r0, 0, s390_r13,
4449                             G_STRUCT_OFFSET(MonoLMF, previous_lmf));
4450
4451                 /*---------------------------------------------------------------*/
4452                 /* save method info                                              */
4453                 /*---------------------------------------------------------------*/
4454                 s390_basr  (code, s390_r1, 0);
4455                 s390_j     (code, 4);
4456                 s390_word  (code, method);
4457                 s390_l     (code, s390_r1, 0, s390_r1, 4);
4458                 s390_st    (code, s390_r1, 0, s390_r13,
4459                             G_STRUCT_OFFSET(MonoLMF, method));
4460
4461                 /*---------------------------------------------------------------*/
4462                 /* save the current IP                                           */
4463                 /*---------------------------------------------------------------*/
4464                 s390_st    (code, STK_BASE, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, ebp));
4465                 s390_basr  (code, s390_r1, 0);
4466                 s390_la    (code, s390_r1, 0, s390_r1, 0);
4467                 s390_st    (code, s390_r1, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, eip));
4468
4469                 /*---------------------------------------------------------------*/
4470                 /* Save general and floating point registers                     */
4471                 /*---------------------------------------------------------------*/
4472                 s390_stm   (code, s390_r2, s390_r12, s390_r13,
4473                             G_STRUCT_OFFSET(MonoLMF, gregs[2]));
4474                 for (i = 0; i < 16; i++) {
4475                         s390_std  (code, i, 0, s390_r13,
4476                                    G_STRUCT_OFFSET(MonoLMF, fregs[i]));
4477                 }
4478
4479                 /*---------------------------------------------------------------*/
4480                 /* Restore the parameter registers now that we've set up the lmf */
4481                 /*---------------------------------------------------------------*/
4482                 s390_lm    (code, s390_r2, s390_r6, s390_r13,
4483                             G_STRUCT_OFFSET(MonoLMF, pregs[0]));
4484         }
4485
4486         if (tracing)
4487                 code = mono_arch_instrument_prolog(cfg, enter_method, code, TRUE);
4488
4489         cfg->code_len = code - cfg->native_code;
4490         g_free (cinfo);
4491
4492         return code;
4493 }
4494
4495 /*========================= End of Function ========================*/
4496
4497 /*------------------------------------------------------------------*/
4498 /*                                                                  */
4499 /* Name         - mono_arch_emit_epilog                             */
4500 /*                                                                  */
4501 /* Function     - Emit the instructions for a function epilog.      */
4502 /*                                                                  */
4503 /*------------------------------------------------------------------*/
4504
4505 void
4506 mono_arch_emit_epilog (MonoCompile *cfg)
4507 {
4508         MonoMethod *method = cfg->method;
4509         int tracing = 0;
4510         guint8 *code;
4511         int max_epilog_size = 96;
4512
4513         if (cfg->method->save_lmf)
4514                 max_epilog_size += 128;
4515
4516         if (mono_jit_trace_calls != NULL)
4517                 max_epilog_size += 128;
4518
4519         if (cfg->prof_options & MONO_PROFILE_ENTER_LEAVE)
4520                 max_epilog_size += 128;
4521
4522         while ((cfg->code_len + max_epilog_size) > (cfg->code_size - 16)) {
4523                 cfg->code_size  *= 2;
4524                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
4525                 mono_jit_stats.code_reallocs++;
4526         }
4527
4528         code = cfg->native_code + cfg->code_len;
4529
4530         if (mono_jit_trace_calls != NULL && mono_trace_eval (method)) {
4531                 code = mono_arch_instrument_epilog (cfg, leave_method, code, TRUE);
4532                 tracing = 1;
4533         }
4534
4535         if (method->save_lmf)
4536                 restoreLMF(code, cfg->frame_reg, cfg->stack_usage);
4537
4538         if (cfg->flags & MONO_CFG_HAS_ALLOCA)
4539                 s390_l (code, STK_BASE, 0, STK_BASE, 0);
4540         else
4541                 code = backUpStackPtr(cfg, code, STK_BASE);
4542
4543         s390_lm  (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
4544         s390_br  (code, s390_r14);
4545
4546         cfg->code_len = code - cfg->native_code;
4547
4548         g_assert (cfg->code_len < cfg->code_size);
4549
4550 }
4551
4552 /*========================= End of Function ========================*/
4553
4554 /*------------------------------------------------------------------*/
4555 /*                                                                  */
4556 /* Name         - mono_arch_emit_exceptions                         */
4557 /*                                                                  */
4558 /* Function     - Emit the blocks to handle exception conditions.   */
4559 /*                                                                  */
4560 /*------------------------------------------------------------------*/
4561
4562 void
4563 mono_arch_emit_exceptions (MonoCompile *cfg)
4564 {
4565         MonoJumpInfo    *patch_info;
4566         guint8          *code;
4567         int             nThrows = 0,
4568                         exc_count = 0,
4569                         iExc;
4570         guint32         code_size;
4571         MonoClass       *exc_classes [MAX_EXC];
4572         guint8          *exc_throw_start [MAX_EXC];
4573
4574         for (patch_info = cfg->patch_info;
4575              patch_info;
4576              patch_info = patch_info->next) {
4577                 if (patch_info->type == MONO_PATCH_INFO_EXC)
4578                         exc_count++;
4579         }
4580
4581         code_size = exc_count * 26;
4582
4583         while ((cfg->code_len + code_size) > (cfg->code_size - 16)) {
4584                 cfg->code_size  *= 2;
4585                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
4586                 mono_jit_stats.code_reallocs++;
4587         }
4588
4589         code = cfg->native_code + cfg->code_len;
4590
4591         /*---------------------------------------------------------------------*/
4592         /* Add code to raise exceptions                                        */
4593         /*---------------------------------------------------------------------*/
4594         for (patch_info = cfg->patch_info; patch_info; patch_info = patch_info->next) {
4595                 switch (patch_info->type) {
4596                 case MONO_PATCH_INFO_EXC: {
4597                         guint8 *ip = patch_info->ip.i + cfg->native_code;
4598                         MonoClass *exc_class;
4599                         guint32 throw_ip;
4600
4601                         /*-----------------------------------------------------*/
4602                         /* Patch the branch in epilog to come here             */
4603                         /*-----------------------------------------------------*/
4604                         s390_patch (ip + 2, (guint32) (S390_RELATIVE(code,ip)));
4605
4606                         exc_class = mono_class_from_name (mono_defaults.corlib,
4607                                                           "System",
4608                                                           patch_info->data.name);
4609                         g_assert (exc_class);
4610                         throw_ip = patch_info->ip.i;
4611
4612                         for (iExc = 0; iExc < nThrows; ++iExc)
4613                                 if (exc_classes [iExc] == exc_class)
4614                                         break;
4615
4616                         if (iExc < nThrows) {
4617                                 s390_jcl (code, S390_CC_UN, (guint32) exc_throw_start [iExc]);
4618                                 patch_info->type = MONO_PATCH_INFO_NONE;
4619                         } else {
4620
4621                                 if (nThrows < MAX_EXC) {
4622                                         exc_classes [nThrows]     = exc_class;
4623                                         exc_throw_start [nThrows] = code;
4624                                 }
4625
4626                                 /*---------------------------------------------*/
4627                                 /* Patch the parameter passed to the handler   */
4628                                 /*---------------------------------------------*/
4629                                 s390_basr (code, s390_r13, 0);
4630                                 s390_j    (code, 4);
4631                                 s390_word (code, patch_info->data.target);
4632                                 /*---------------------------------------------*/
4633                                 /* Load return address & parameter register    */
4634                                 /*---------------------------------------------*/
4635                                 s390_larl (code, s390_r14, (gsize)S390_RELATIVE((patch_info->ip.i +
4636                                                            cfg->native_code + 8), code));
4637                                 s390_l    (code, s390_r2, 0, s390_r13, 4);
4638                                 /*---------------------------------------------*/
4639                                 /* Reuse the current patch to set the jump     */
4640                                 /*---------------------------------------------*/
4641                                 patch_info->type      = MONO_PATCH_INFO_INTERNAL_METHOD;
4642                                 patch_info->data.name = "mono_arch_throw_exception_by_name";
4643                                 patch_info->ip.i      = code - cfg->native_code;
4644                                 s390_jcl  (code, S390_CC_UN, 0);
4645                         }
4646                         break;
4647                 }
4648                 default:
4649                         /* do nothing */
4650                         break;
4651                 }
4652         }
4653
4654         cfg->code_len = code - cfg->native_code;
4655
4656         g_assert (cfg->code_len < cfg->code_size);
4657
4658 }
4659
4660 /*========================= End of Function ========================*/
4661
4662 /*------------------------------------------------------------------*/
4663 /*                                                                  */
4664 /* Name         - mono_arch_setup_jit_tls_data                      */
4665 /*                                                                  */
4666 /* Function     - Setup the JIT's Thread Level Specific Data.       */
4667 /*                                                                  */
4668 /*------------------------------------------------------------------*/
4669
4670 void
4671 mono_arch_setup_jit_tls_data (MonoJitTlsData *tls)
4672 {
4673
4674         if (!tls_offset_inited) {
4675                 tls_offset_inited = TRUE;
4676
4677 #if HAVE_KW_THREAD
4678 # if 0
4679         __asm__ ("\tear\t%r1,0\n"
4680                  "\tlr\t%0,%3\n"
4681                  "\tsr\t%0,%r1\n"
4682                  "\tlr\t%1,%4\n"
4683                  "\tsr\t%1,%r1\n"
4684                  "\tlr\t%2,%5\n"
4685                  "\tsr\t%2,%r1\n"
4686                  : "=r" (appdomain_tls_offset),
4687                    "=r" (thread_tls_offset),
4688                    "=r" (lmf_tls_offset)
4689                  : "r" (&tls_appdomain),
4690                    "r" (&tls_current_object),
4691                    "r" (&mono_lmf_addr)
4692                  : "1", "cc");
4693 # endif
4694 #endif
4695         }
4696
4697         if (!lmf_addr_key_inited) {
4698                 lmf_addr_key_inited = TRUE;
4699                 pthread_key_create (&lmf_addr_key, NULL);
4700         }
4701         pthread_setspecific (lmf_addr_key, &tls->lmf);
4702
4703 }
4704
4705 /*========================= End of Function ========================*/
4706
4707 /*------------------------------------------------------------------*/
4708 /*                                                                  */
4709 /* Name         - mono_arch_free_jit_tls_data                       */
4710 /*                                                                  */
4711 /* Function     - Free tls data.                                    */
4712 /*                                                                  */
4713 /*------------------------------------------------------------------*/
4714
4715 void
4716 mono_arch_free_jit_tls_data (MonoJitTlsData *tls)
4717 {
4718
4719 }
4720
4721 /*========================= End of Function ========================*/
4722
4723 /*------------------------------------------------------------------*/
4724 /*                                                                  */
4725 /* Name         - mono_arch_emit_this_vret_args                     */
4726 /*                                                                  */
4727 /* Function     -                                                   */
4728 /*                                                                  */
4729 /*------------------------------------------------------------------*/
4730
4731 void
4732 mono_arch_emit_this_vret_args (MonoCompile *cfg, MonoCallInst *inst, int this_reg, int this_type, int vt_reg)
4733 {
4734         int this_dreg = s390_r2;
4735
4736         if (vt_reg != -1)
4737                 this_dreg = s390_r3;
4738
4739         /* add the this argument */
4740         if (this_reg != -1) {
4741                 MonoInst *this;
4742                 MONO_INST_NEW (cfg, this, OP_MOVE);
4743                 this->type  = this_type;
4744                 this->sreg1 = this_reg;
4745                 this->dreg  = mono_regstate_next_int (cfg->rs);
4746                 mono_bblock_add_inst (cfg->cbb, this);
4747                 mono_call_inst_add_outarg_reg (cfg, inst, this->dreg, this_dreg, FALSE);
4748         }
4749
4750         if (vt_reg != -1) {
4751                 MonoInst *vtarg;
4752                 MONO_INST_NEW (cfg, vtarg, OP_MOVE);
4753                 vtarg->type  = STACK_MP;
4754                 vtarg->sreg1 = vt_reg;
4755                 vtarg->dreg  = mono_regstate_next_int (cfg->rs);
4756                 mono_bblock_add_inst (cfg->cbb, vtarg);
4757                 mono_call_inst_add_outarg_reg (cfg, inst, vtarg->dreg, s390_r2, FALSE);
4758         }
4759 }
4760
4761 /*========================= End of Function ========================*/
4762
4763 /*------------------------------------------------------------------*/
4764 /*                                                                  */
4765 /* Name         - mono_arch_get_inst_for_method                   */
4766 /*                                                                  */
4767 /* Function     - Check for opcodes we can handle directly in       */
4768 /*                hardware.                                         */
4769 /*                                                                  */
4770 /*------------------------------------------------------------------*/
4771
4772 MonoInst*
4773 mono_arch_get_inst_for_method (MonoCompile *cfg, MonoMethod *cmethod,
4774                                MonoMethodSignature *fsig, MonoInst **args)
4775 {
4776         MonoInst *ins = NULL;
4777
4778         if (cmethod->klass == mono_defaults.math_class) {
4779                 if (strcmp (cmethod->name, "Sqrt") == 0) {
4780                         MONO_INST_NEW (cfg, ins, OP_SQRT);
4781                         ins->inst_i0 = args [0];
4782                 }
4783         } else if (cmethod->klass == mono_defaults.thread_class &&
4784                            strcmp (cmethod->name, "MemoryBarrier") == 0) {
4785                 MONO_INST_NEW (cfg, ins, OP_MEMORY_BARRIER);
4786         } else if(cmethod->klass->image == mono_defaults.corlib &&
4787                            (strcmp (cmethod->klass->name_space, "System.Threading") == 0) &&
4788                            (strcmp (cmethod->klass->name, "Interlocked") == 0)) {
4789
4790                 if (strcmp (cmethod->name, "Increment") == 0 &&
4791                     fsig->params [0]->type == MONO_TYPE_I4) {
4792                         MonoInst *ins_iconst;
4793
4794                         MONO_INST_NEW (cfg, ins, OP_ATOMIC_ADD_NEW_I4);
4795                         MONO_INST_NEW (cfg, ins_iconst, OP_ICONST);
4796                         ins_iconst->inst_c0 = 1;
4797
4798                         ins->inst_i0 = args [0];
4799                         ins->inst_i1 = ins_iconst;
4800                 } else if (strcmp (cmethod->name, "Decrement") == 0 &&
4801                            fsig->params [0]->type == MONO_TYPE_I4) {
4802                         MonoInst *ins_iconst;
4803
4804                         MONO_INST_NEW (cfg, ins, OP_ATOMIC_ADD_NEW_I4);
4805                         MONO_INST_NEW (cfg, ins_iconst, OP_ICONST);
4806                         ins_iconst->inst_c0 = -1;
4807
4808                         ins->inst_i0 = args [0];
4809                         ins->inst_i1 = ins_iconst;
4810                 } else if (strcmp (cmethod->name, "Exchange") == 0 &&
4811                            fsig->params [0]->type == MONO_TYPE_I4) {
4812                         MONO_INST_NEW (cfg, ins, OP_ATOMIC_EXCHANGE_I4);
4813
4814                         ins->inst_i0 = args [0];
4815                         ins->inst_i1 = args [1];
4816                 } else if (strcmp (cmethod->name, "Add") == 0 &&
4817                            fsig->params [0]->type == MONO_TYPE_I4) {
4818                         MONO_INST_NEW (cfg, ins, OP_ATOMIC_ADD_I4);
4819
4820                         ins->inst_i0 = args [0];
4821                         ins->inst_i1 = args [1];
4822                 }
4823         }
4824         return ins;
4825 }
4826
4827 /*========================= End of Function ========================*/
4828
4829 /*------------------------------------------------------------------*/
4830 /*                                                                  */
4831 /* Name         - mono_arch_print_tree                              */
4832 /*                                                                  */
4833 /* Function     - Print platform-specific opcode details.           */
4834 /*                                                                  */
4835 /* Returns      - 1 - opcode details have been printed              */
4836 /*                0 - opcode details have not been printed          */
4837 /*                                                                  */
4838 /*------------------------------------------------------------------*/
4839
4840 gboolean
4841 mono_arch_print_tree (MonoInst *tree, int arity)
4842 {
4843         gboolean done;
4844
4845         switch (tree->opcode) {
4846                 case OP_S390_LOADARG:
4847                 case OP_S390_ARGREG:
4848                 case OP_S390_ARGPTR:
4849                         printf ("[0x%lx(%s)]", tree->inst_offset,
4850                                 mono_arch_regname (tree->inst_basereg));
4851                         done = 1;
4852                         break;
4853                 case OP_S390_STKARG:
4854                         printf ("[0x%lx(previous_frame)]",
4855                                 tree->inst_offset);
4856                         done = 1;
4857                         break;
4858                 case OP_S390_MOVE:
4859                         printf ("[0x%lx(%d,%s),0x%lx(%s)]",
4860                                 tree->inst_offset, tree->backend.size,
4861                                 mono_arch_regname(tree->dreg), tree->inst_imm,
4862                                 mono_arch_regname(tree->sreg1));
4863                         done = 1;
4864                         break;
4865                 case OP_S390_SETF4RET:
4866                         printf ("[%s,%s]",
4867                                 mono_arch_fregname (tree->dreg),
4868                                 mono_arch_fregname (tree->sreg1));
4869                         done = 1;
4870                         break;
4871                 case OP_TLS_GET:
4872                         printf ("[0x%lx(0x%lx,%s)]", tree->inst_offset,
4873                                 tree->inst_imm,
4874                                 mono_arch_regname (tree->sreg1));
4875                         done = 1;
4876                         break;
4877                 case OP_S390_BKCHAIN:
4878                         printf ("[previous_frame(%s)]",
4879                                 mono_arch_regname (tree->sreg1));
4880                         done = 1;
4881                         break;
4882                 default:
4883                         done = 0;
4884         }
4885         return (done);
4886 }
4887
4888 /*========================= End of Function ========================*/
4889
4890 /*------------------------------------------------------------------*/
4891 /*                                                                  */
4892 /* Name         - mono_arch_regalloc_cost                           */
4893 /*                                                                  */
4894 /* Function     - Determine the cost, in the number of memory       */
4895 /*                references, of the action of allocating the var-  */
4896 /*                iable VMV into a register during global register  */
4897 /*                allocation.                                       */
4898 /*                                                                  */
4899 /* Returns      - Cost                                              */
4900 /*                                                                  */
4901 /*------------------------------------------------------------------*/
4902
4903 guint32
4904 mono_arch_regalloc_cost (MonoCompile *cfg, MonoMethodVar *vmv)
4905 {
4906         /* FIXME: */
4907         return 2;
4908 }
4909
4910 /*========================= End of Function ========================*/
4911
4912 /*------------------------------------------------------------------*/
4913 /*                                                                  */
4914 /* Name         - mono_arch_get_domain_intrinsic                    */
4915 /*                                                                  */
4916 /* Function     -                                                   */
4917 /*                                                                  */
4918 /* Returns      -                                                   */
4919 /*                                                                  */
4920 /*------------------------------------------------------------------*/
4921
4922 MonoInst *
4923 mono_arch_get_domain_intrinsic (MonoCompile* cfg)
4924 {
4925         MonoInst *ins;
4926
4927         if (appdomain_tls_offset == -1)
4928                 return NULL;
4929
4930         MONO_INST_NEW (cfg, ins, OP_TLS_GET);
4931         ins->inst_offset = appdomain_tls_offset;
4932         return (ins);
4933 }
4934
4935 /*========================= End of Function ========================*/
4936
4937 /*------------------------------------------------------------------*/
4938 /*                                                                  */
4939 /* Name         - mono_arch_get_thread_intrinsic                    */
4940 /*                                                                  */
4941 /* Function     -                                                   */
4942 /*                                                                  */
4943 /* Returns      -                                                   */
4944 /*                                                                  */
4945 /*------------------------------------------------------------------*/
4946
4947 MonoInst *
4948 mono_arch_get_thread_intrinsic (MonoCompile* cfg)
4949 {
4950         MonoInst *ins;
4951
4952         if (thread_tls_offset == -1)
4953                 return NULL;
4954
4955         MONO_INST_NEW (cfg, ins, OP_TLS_GET);
4956         ins->inst_offset = thread_tls_offset;
4957         return (ins);
4958 }
4959
4960 /*========================= End of Function ========================*/
4961
4962 /*------------------------------------------------------------------*/
4963 /*                                                                  */
4964 /* Name         - mono_arch_flush_register_windows                  */
4965 /*                                                                  */
4966 /* Function     -                                                   */
4967 /*                                                                  */
4968 /* Returns      -                                                   */
4969 /*                                                                  */
4970 /*------------------------------------------------------------------*/
4971
4972 void
4973 mono_arch_flush_register_windows (void)
4974 {
4975 }
4976
4977 /*========================= End of Function ========================*/
4978
4979 /*------------------------------------------------------------------*/
4980 /*                                                                  */
4981 /* Name         - mono_arch_get_lmf_addr                            */
4982 /*                                                                  */
4983 /* Function     -                                                   */
4984 /*                                                                  */
4985 /* Returns      -                                                   */
4986 /*                                                                  */
4987 /*------------------------------------------------------------------*/
4988
4989 gpointer
4990 mono_arch_get_lmf_addr (void)
4991 {
4992         return pthread_getspecific (lmf_addr_key);
4993 }
4994
4995
4996 /*========================= End of Function ========================*/
4997
4998 /*------------------------------------------------------------------*/
4999 /*                                                                  */
5000 /* Name         - mono_arch_get_patch_offset                        */
5001 /*                                                                  */
5002 /* Function     - Dummy entry point until s390x supports aot.       */
5003 /*                                                                  */
5004 /* Returns      - Offset for patch.                                 */
5005 /*                                                                  */
5006 /*------------------------------------------------------------------*/
5007
5008 guint32
5009 mono_arch_get_patch_offset (guint8 *code)
5010 {
5011         return 0;
5012 }
5013
5014 /*========================= End of Function ========================*/