mono/mini/mini-s390.c

   1 /*------------------------------------------------------------------*/
   2 /*                                                                  */
   3 /* Name        - mini-s390.c                                        */
   4 /*                                                                  */
   5 /* Function    - S/390 backend for the Mono code generator.         */
   6 /*                                                                  */
   7 /* Name        - Neale Ferguson (Neale.Ferguson@SoftwareAG-usa.com) */
   8 /*                                                                  */
   9 /* Date        - January, 2004                                      */
  10 /*                                                                  */
  11 /* Derivation  - From mini-x86 & mini-ppc by -                      */
  12 /*               Paolo Molaro (lupus@ximian.com)                    */
  13 /*               Dietmar Maurer (dietmar@ximian.com)                */
  14 /*                                                                  */
  15 /*------------------------------------------------------------------*/
  16
  17 /*------------------------------------------------------------------*/
  18 /*                 D e f i n e s                                    */
  19 /*------------------------------------------------------------------*/
  20
  21 #define NOT_IMPLEMENTED(x) \
  22         g_error ("FIXME: %s is not yet implemented.", x);
  23
  24 #define EMIT_COND_BRANCH(ins,cond)                                                      \
  25 {                                                                                       \
  26 if (ins->flags & MONO_INST_BRLABEL) {                                                   \
  27         if (ins->inst_i0->inst_c0) {                                                    \
  28                 int displace;                                                           \
  29                 displace = ((cfg->native_code + ins->inst_i0->inst_c0) - code) / 2;     \
  30                 if (s390_is_imm16(displace)) {                                          \
  31                         s390_brc (code, cond, displace);                                \
  32                 } else {                                                                \
  33                         s390_jcl (code, cond, displace);                                \
  34                 }                                                                       \
  35         } else {                                                                        \
  36                 mono_add_patch_info (cfg, code - cfg->native_code,                      \
  37                                      MONO_PATCH_INFO_LABEL, ins->inst_i0);              \
  38                 s390_jcl (code, cond, 0);                                               \
  39         }                                                                               \
  40 } else {                                                                                \
  41         if (ins->inst_true_bb->native_offset) {                                         \
  42                 int displace;                                                           \
  43                 displace = ((cfg->native_code +                                         \
  44                             ins->inst_true_bb->native_offset) - code) / 2;              \
  45                 if (s390_is_imm16(displace)) {                                          \
  46                         s390_brc (code, cond, displace);                                \
  47                 } else {                                                                \
  48                         s390_jcl (code, cond, displace);                                \
  49                 }                                                                       \
  50         } else {                                                                        \
  51                 mono_add_patch_info (cfg, code - cfg->native_code,                      \
  52                                      MONO_PATCH_INFO_BB, ins->inst_true_bb);            \
  53                 s390_jcl (code, cond, 0);                                               \
  54         }                                                                               \
  55 }                                                                                       \
  56 }
  57
  58 #define EMIT_UNCOND_BRANCH(ins)                                                         \
  59 {                                                                                       \
  60 if (ins->flags & MONO_INST_BRLABEL) {                                                   \
  61         if (ins->inst_i0->inst_c0) {                                                    \
  62                 int displace;                                                           \
  63                 displace = ((cfg->native_code + ins->inst_i0->inst_c0) - code) / 2;     \
  64                 if (s390_is_imm16(displace)) {                                          \
  65                         s390_brc (code, S390_CC_UN, displace);                          \
  66                 } else {                                                                \
  67                         s390_jcl (code, S390_CC_UN, displace);                          \
  68                 }                                                                       \
  69         } else {                                                                        \
  70                 mono_add_patch_info (cfg, code - cfg->native_code,                      \
  71                                      MONO_PATCH_INFO_LABEL, ins->inst_i0);              \
  72                 s390_jcl (code, S390_CC_UN, 0);                                         \
  73         }                                                                               \
  74 } else {                                                                                \
  75         if (ins->inst_target_bb->native_offset) {                                       \
  76                 int displace;                                                           \
  77                 displace = ((cfg->native_code +                                         \
  78                             ins->inst_target_bb->native_offset) - code) / 2;            \
  79                 if (s390_is_imm16(displace)) {                                          \
  80                         s390_brc (code, S390_CC_UN, displace);                          \
  81                 } else {                                                                \
  82                         s390_jcl (code, S390_CC_UN, displace);                          \
  83                 }                                                                       \
  84         } else {                                                                        \
  85                 mono_add_patch_info (cfg, code - cfg->native_code,                      \
  86                                      MONO_PATCH_INFO_BB, ins->inst_target_bb);          \
  87                 s390_jcl (code, S390_CC_UN, 0);                                         \
  88         }                                                                               \
  89 }                                                                                       \
  90 }
  91
  92 #define EMIT_COND_SYSTEM_EXCEPTION(cond,exc_name)                       \
  93         do {                                                            \
  94                 mono_add_patch_info (cfg, code - cfg->native_code,      \
  95                                     MONO_PATCH_INFO_EXC, exc_name);     \
  96                 s390_jcl (code, cond, 0);                               \
  97         } while (0);
  98
  99 #define CHECK_SRCDST_COM                                                \
 100         if (ins->dreg == ins->sreg2) {                                  \
 101                 src2 = ins->sreg1;                                      \
 102         } else {                                                        \
 103                 src2 = ins->sreg2;                                      \
 104                 if (ins->dreg != ins->sreg1) {                          \
 105                         s390_lr  (code, ins->dreg, ins->sreg1);         \
 106                 }                                                       \
 107         }
 108
 109 #define CHECK_SRCDST_NCOM                                               \
 110         if (ins->dreg == ins->sreg2) {                                  \
 111                 src2 = s390_r13;                                        \
 112                 s390_lr  (code, s390_r13, ins->sreg2);                  \
 113         } else {                                                        \
 114                 src2 = ins->sreg2;                                      \
 115         }                                                               \
 116         if (ins->dreg != ins->sreg1) {                                  \
 117                 s390_lr  (code, ins->dreg, ins->sreg1);                 \
 118         }
 119
 120 #define CHECK_SRCDST_COM_F                                              \
 121         if (ins->dreg == ins->sreg2) {                                  \
 122                 src2 = ins->sreg1;                                      \
 123         } else {                                                        \
 124                 src2 = ins->sreg2;                                      \
 125                 if (ins->dreg != ins->sreg1) {                          \
 126                         s390_ldr (code, ins->dreg, ins->sreg1);         \
 127                 }                                                       \
 128         }
 129
 130 #define CHECK_SRCDST_NCOM_F                                             \
 131         if (ins->dreg == ins->sreg2) {                                  \
 132                 src2 = s390_f15;                                        \
 133                 s390_ldr (code, s390_r13, ins->sreg2);                  \
 134         } else {                                                        \
 135                 src2 = ins->sreg2;                                      \
 136         }                                                               \
 137         if (ins->dreg != ins->sreg1) {                                  \
 138                 s390_ldr (code, ins->dreg, ins->sreg1);                 \
 139         }
 140
 141 #undef DEBUG
 142 #define DEBUG(a) if (cfg->verbose_level > 1) a
 143
 144 #define MAX_EXC 16
 145
 146 #define S390_TRACE_STACK_SIZE (5*sizeof(gint32)+3*sizeof(gdouble))
 147
 148 #define MAX (a, b) ((a) > (b) ? (a) : (b))
 149
 150 /*========================= End of Defines =========================*/
 151
 152 /*------------------------------------------------------------------*/
 153 /*                 I n c l u d e s                                  */
 154 /*------------------------------------------------------------------*/
 155
 156 #include "mini.h"
 157 #include <string.h>
 158
 159 #include <mono/metadata/appdomain.h>
 160 #include <mono/metadata/debug-helpers.h>
 161 #include <mono/metadata/profiler-private.h>
 162 #include <mono/utils/mono-math.h>
 163
 164 #include "mini-s390.h"
 165 #include "inssel.h"
 166 #include "cpu-s390.h"
 167
 168 /*========================= End of Includes ========================*/
 169
 170 /*------------------------------------------------------------------*/
 171 /*                 T y p e d e f s                                  */
 172 /*------------------------------------------------------------------*/
 173
 174 typedef struct {
 175         guint stack_size,
 176               local_size,
 177               code_size,
 178               parm_size,
 179               offset,
 180               offStruct,
 181               retStruct;
 182 } size_data;
 183
 184 /*------------------------------------------------------------------*/
 185 /* Used by the instrument_emit_epilog                               */
 186 /*------------------------------------------------------------------*/
 187
 188 enum {
 189         SAVE_NONE,
 190         SAVE_STRUCT,
 191         SAVE_ONE,
 192         SAVE_TWO,
 193         SAVE_R4,
 194         SAVE_R8
 195 };
 196
 197 typedef struct InstList InstList;
 198
 199 struct InstList {
 200         InstList *prev;
 201         InstList *next;
 202         MonoInst *data;
 203 };
 204
 205 enum {
 206         RegTypeGeneral,
 207         RegTypeBase,
 208         RegTypeFP,
 209         RegTypeStructByVal,
 210         RegTypeStructByAddr
 211 };
 212
 213 typedef struct {
 214         gint32  offset;         /* offset from caller's stack */
 215         gint32  offparm;        /* offset from callee's stack */
 216         guint16 vtsize;         /* in param area */
 217         guint8  reg;
 218         guint8  regtype;        /* See RegType* */
 219         guint32 size;           /* Size of structure used by RegTypeStructByVal */
 220 } ArgInfo;
 221
 222 typedef struct {
 223         int nargs;
 224         guint32 stack_usage;
 225         guint32 struct_ret;
 226         ArgInfo ret;
 227         ArgInfo sigCookie;
 228         ArgInfo args [1];
 229 } CallInfo;
 230
 231 typedef struct {
 232         gint32  gr[5];          /* R2-R6                            */
 233         gdouble fp[3];          /* F0-F2                            */
 234 } __attribute__ ((packed)) RegParm;
 235
 236 /*========================= End of Typedefs ========================*/
 237
 238 /*------------------------------------------------------------------*/
 239 /*                   P r o t o t y p e s                            */
 240 /*------------------------------------------------------------------*/
 241
 242 static void indent (int);
 243 static guint8 * backUpStackPtr(MonoCompile *, guint8 *, gint);
 244 static void decodeParm (MonoType *, void *, int);
 245 static void enter_method (MonoMethod *, RegParm *, char *);
 246 static void leave_method (MonoMethod *, ...);
 247 static gboolean is_regsize_var (MonoType *);
 248 static inline void add_general (guint *, size_data *, ArgInfo *, gboolean);
 249 static inline void add_stackParm (guint *, size_data *, ArgInfo *, gint);
 250 static inline void add_float (guint *, size_data *, ArgInfo *);
 251 static CallInfo * calculate_sizes (MonoMethodSignature *, size_data *, gboolean);
 252 static void peephole_pass (MonoCompile *, MonoBasicBlock *);
 253 static guchar * emit_float_to_int (MonoCompile *, guchar *, int, int, int, gboolean);
 254 static void mono_arch_break(void);
 255 gpointer mono_arch_get_lmf_addr (void);
 256 static guint8 * emit_load_volatile_registers(guint8 *, MonoCompile *);
 257
 258 /*========================= End of Prototypes ======================*/
 259
 260 /*------------------------------------------------------------------*/
 261 /*                 G l o b a l   V a r i a b l e s                  */
 262 /*------------------------------------------------------------------*/
 263
 264 int mono_exc_esp_offset = 0;
 265
 266 static int indent_level = 0;
 267
 268 static const char*const * ins_spec = s390_cpu_desc;
 269
 270 static gboolean tls_offset_inited = FALSE;
 271
 272 static int appdomain_tls_offset = -1,
 273            lmf_tls_offset = -1,
 274            thread_tls_offset = -1;
 275
 276 pthread_key_t lmf_addr_key;
 277
 278 gboolean lmf_addr_key_inited = FALSE;
 279
 280 #if 0
 281
 282 extern __thread MonoDomain *tls_appdomain;
 283 extern __thread MonoThread *tls_current_object;
 284 extern __thread gpointer   mono_lmf_addr;
 285
 286 #endif
 287
 288 /*====================== End of Global Variables ===================*/
 289
 290 /*------------------------------------------------------------------*/
 291 /*                                                                  */
 292 /* Name         - mono_arch_regname                                 */
 293 /*                                                                  */
 294 /* Function     - Returns the name of the register specified by     */
 295 /*                the input parameter.                              */
 296 /*                                                                  */
 297 /*------------------------------------------------------------------*/
 298
 299 const char*
 300 mono_arch_regname (int reg) {
 301         static const char * rnames[] = {
 302                 "s390_r0", "s390_sp", "s390_r2", "s390_r3", "s390_r4",
 303                 "s390_r5", "s390_r6", "s390_r7", "s390_r8", "s390_r9",
 304                 "s390_r10", "s390_r11", "s390_r12", "s390_r13", "s390_r14",
 305                 "s390_r15"
 306         };
 307
 308         if (reg >= 0 && reg < 16)
 309                 return rnames [reg];
 310         else
 311                 return "unknown";
 312 }
 313
 314 /*========================= End of Function ========================*/
 315
 316 /*------------------------------------------------------------------*/
 317 /*                                                                  */
 318 /* Name         - mono_arch_fregname                                */
 319 /*                                                                  */
 320 /* Function     - Returns the name of the register specified by     */
 321 /*                the input parameter.                              */
 322 /*                                                                  */
 323 /*------------------------------------------------------------------*/
 324
 325 const char*
 326 mono_arch_fregname (int reg) {
 327         static const char * rnames[] = {
 328                 "s390_f0", "s390_f1", "s390_f2", "s390_f3", "s390_f4",
 329                 "s390_f5", "s390_f6", "s390_f7", "s390_f8", "s390_f9",
 330                 "s390_f10", "s390_f11", "s390_f12", "s390_f13", "s390_f14",
 331                 "s390_f15"
 332         };
 333
 334         if (reg >= 0 && reg < 16)
 335                 return rnames [reg];
 336         else
 337                 return "unknown";
 338 }
 339
 340 /*========================= End of Function ========================*/
 341
 342 /*------------------------------------------------------------------*/
 343 /*                                                                  */
 344 /* Name         - arch_get_argument_info                            */
 345 /*                                                                  */
 346 /* Function     - Gathers information on parameters such as size,   */
 347 /*                alignment, and padding. arg_info should be large  */
 348 /*                enough to hold param_count + 1 entries.           */
 349 /*                                                                  */
 350 /* Parameters   - @csig - Method signature                          */
 351 /*                @param_count - No. of parameters to consider      */
 352 /*                @arg_info - An array to store the result info     */
 353 /*                                                                  */
 354 /* Returns      - Size of the activation frame                      */
 355 /*                                                                  */
 356 /*------------------------------------------------------------------*/
 357
 358 int
 359 mono_arch_get_argument_info (MonoMethodSignature *csig,
 360                              int param_count,
 361                              MonoJitArgumentInfo *arg_info)
 362 {
 363         int k, frame_size = 0;
 364         int size, align, pad;
 365         int offset = 8;
 366
 367         if (MONO_TYPE_ISSTRUCT (csig->ret)) {
 368                 frame_size += sizeof (gpointer);
 369                 offset += 4;
 370         }
 371
 372         arg_info [0].offset = offset;
 373
 374         if (csig->hasthis) {
 375                 frame_size += sizeof (gpointer);
 376                 offset += 4;
 377         }
 378
 379         arg_info [0].size = frame_size;
 380
 381         for (k = 0; k < param_count; k++) {
 382
 383                 if (csig->pinvoke)
 384                         size = mono_type_native_stack_size (csig->params [k], &align);
 385                 else
 386                         size = mono_type_stack_size (csig->params [k], &align);
 387
 388                 frame_size += pad = (align - (frame_size & (align - 1))) & (align - 1);
 389                 arg_info [k].pad = pad;
 390                 frame_size += size;
 391                 arg_info [k + 1].pad = 0;
 392                 arg_info [k + 1].size = size;
 393                 offset += pad;
 394                 arg_info [k + 1].offset = offset;
 395                 offset += size;
 396         }
 397
 398         align = MONO_ARCH_FRAME_ALIGNMENT;
 399         frame_size += pad = (align - (frame_size & (align - 1))) & (align - 1);
 400         arg_info [k].pad = pad;
 401
 402         return frame_size;
 403 }
 404
 405 /*========================= End of Function ========================*/
 406
 407 /*------------------------------------------------------------------*/
 408 /*                                                                  */
 409 /* Name         - retFitsInReg.                                     */
 410 /*                                                                  */
 411 /* Function     - Determines if a value can be returned in one or   */
 412 /*                two registers.                                    */
 413 /*                                                                  */
 414 /*------------------------------------------------------------------*/
 415
 416 static inline gboolean
 417 retFitsInReg(guint32 size)
 418 {
 419         switch (size) {
 420                 case 0:
 421                 case 1:
 422                 case 2:
 423                 case 4:
 424                 case 8:
 425                         return (TRUE);
 426                 break;
 427                 default:
 428                         return (FALSE);
 429         }
 430 }
 431
 432 /*========================= End of Function ========================*/
 433
 434 /*------------------------------------------------------------------*/
 435 /*                                                                  */
 436 /* Name         - backStackPtr.                                     */
 437 /*                                                                  */
 438 /* Function     - Restore Stack Pointer to previous frame.          */
 439 /*                                                                  */
 440 /*------------------------------------------------------------------*/
 441
 442 static inline guint8 *
 443 backUpStackPtr(MonoCompile *cfg, guint8 *code, gint framePtr)
 444 {
 445         int stackSize = cfg->stack_usage;
 446
 447         if (s390_is_uimm16 (cfg->stack_usage)) {
 448                 s390_ahi  (code, framePtr, cfg->stack_usage);
 449         } else {
 450                 while (stackSize > 32767) {
 451                         s390_ahi  (code, framePtr, 32767);
 452                         stackSize -= 32767;
 453                 }
 454                 s390_ahi  (code, framePtr, stackSize);
 455         }
 456         return (code);
 457 }
 458
 459 /*========================= End of Function ========================*/
 460
 461 /*------------------------------------------------------------------*/
 462 /*                                                                  */
 463 /* Name         - indent                                            */
 464 /*                                                                  */
 465 /* Function     - Perform nice indenting to current level           */
 466 /*                                                                  */
 467 /*------------------------------------------------------------------*/
 468
 469 static void
 470 indent (int diff) {
 471         int v;
 472         if (diff < 0)
 473                 indent_level += diff;
 474         v = indent_level;
 475         printf("[%3d] ",v);
 476         while (v-- > 0) {
 477                 printf (". ");
 478         }
 479         if (diff > 0)
 480                 indent_level += diff;
 481 }
 482
 483 /*========================= End of Function ========================*/
 484
 485 /*------------------------------------------------------------------*/
 486 /*                                                                  */
 487 /* Name         - decodeParm                                        */
 488 /*                                                                  */
 489 /* Function     - Decode a parameter for the trace.                 */
 490 /*                                                                  */
 491 /*------------------------------------------------------------------*/
 492
 493 static void
 494 decodeParm(MonoType *type, void *curParm, int size)
 495 {
 496         guint32 simpleType;
 497
 498         if (type->byref) {
 499                 printf("[BYREF:%p], ", *((char **) curParm));
 500         } else {
 501                 simpleType = mono_type_get_underlying_type(type)->type;
 502 enum_parmtype:
 503                 switch (simpleType) {
 504                         case MONO_TYPE_I :
 505                                 printf ("[INTPTR:%p], ", *((int **) curParm));
 506                                 break;
 507                         case MONO_TYPE_U :
 508                                 printf ("[UINTPTR:%p], ", *((int **) curParm));
 509                                 break;
 510                         case MONO_TYPE_BOOLEAN :
 511                                 printf ("[BOOL:%d], ", *((int *) curParm));
 512                                 break;
 513                         case MONO_TYPE_CHAR :
 514                                 printf ("[CHAR:%c], ", *((int *) curParm));
 515                                 break;
 516                         case MONO_TYPE_I1 :
 517                                 printf ("[INT1:%d], ", *((int *) curParm));
 518                                 break;
 519                         case MONO_TYPE_I2 :
 520                                 printf ("[INT2:%d], ", *((int *) curParm));
 521                                 break;
 522                         case MONO_TYPE_I4 :
 523                                 printf ("[INT4:%d], ", *((int *) curParm));
 524                                 break;
 525                         case MONO_TYPE_U1 :
 526                                 printf ("[UINT1:%u], ", *((unsigned int *) curParm));
 527                                 break;
 528                         case MONO_TYPE_U2 :
 529                                 printf ("[UINT2:%u], ", *((guint16 *) curParm));
 530                                 break;
 531                         case MONO_TYPE_U4 :
 532                                 printf ("[UINT4:%u], ", *((guint32 *) curParm));
 533                                 break;
 534                         case MONO_TYPE_U8 :
 535                                 printf ("[UINT8:%llu], ", *((guint64 *) curParm));
 536                                 break;
 537                         case MONO_TYPE_STRING : {
 538                                 MonoString *s = *((MonoString **) curParm);
 539                                 if (s) {
 540                                         g_assert (((MonoObject *) s)->vtable->klass == mono_defaults.string_class);
 541                                         printf("[STRING:%p:%s], ", s, mono_string_to_utf8(s));
 542                                 } else {
 543                                         printf("[STRING:null], ");
 544                                 }
 545                                 break;
 546                         }
 547                         case MONO_TYPE_CLASS :
 548                         case MONO_TYPE_OBJECT : {
 549                                 MonoObject *obj = *((MonoObject **) curParm);
 550                                 MonoClass *class;
 551                                 if ((obj) && (obj->vtable)) {
 552                                         printf("[CLASS/OBJ:");
 553                                         class = obj->vtable->klass;
 554                                         printf("%p [%p] ",obj,curParm);
 555 //                                      if (class == mono_defaults.string_class) {
 556 //                                              printf("[STRING:%p:%s]",
 557 //                                                     *obj, mono_string_to_utf8 (obj));
 558 //                                      } else if (class == mono_defaults.int32_class) {
 559 //                                              printf("[INT32:%p:%d]",
 560 //                                                      obj, *(gint32 *)((char *)obj + sizeof (MonoObject)));
 561 //                                      } else
 562 //                                              printf("[%s.%s:%p]",
 563 //                                                     class->name_space, class->name, obj);
 564                                         printf("], ");
 565                                 } else {
 566                                         printf("[OBJECT:null], ");
 567                                 }
 568                                 break;
 569                         }
 570                         case MONO_TYPE_PTR :
 571                                 printf("[PTR:%p], ", *((gpointer **) (curParm)));
 572                                 break;
 573                         case MONO_TYPE_FNPTR :
 574                                 printf("[FNPTR:%p], ", *((gpointer **) (curParm)));
 575                                 break;
 576                         case MONO_TYPE_ARRAY :
 577                                 printf("[ARRAY:%p], ", *((gpointer **) (curParm)));
 578                                 break;
 579                         case MONO_TYPE_SZARRAY :
 580                                 printf("[SZARRAY:%p], ", *((gpointer **) (curParm)));
 581                                 break;
 582                         case MONO_TYPE_I8 :
 583                                 printf("[INT8:%lld], ", *((gint64 *) (curParm)));
 584                                 break;
 585                         case MONO_TYPE_R4 :
 586                                 printf("[FLOAT4:%g], ", *((double *) (curParm)));
 587                                 break;
 588                         case MONO_TYPE_R8 :
 589                                 printf("[FLOAT8:%g], ", *((double *) (curParm)));
 590                                 break;
 591                         case MONO_TYPE_VALUETYPE : {
 592                                 int i;
 593                                 MonoMarshalType *info;
 594
 595                                 if (type->data.klass->enumtype) {
 596                                         simpleType = type->data.klass->enum_basetype->type;
 597                                         printf("{VALUETYPE} - ");
 598                                         goto enum_parmtype;
 599                                 }
 600
 601                                 info = mono_marshal_load_type_info (type->data.klass);
 602
 603                                 if ((info->native_size == sizeof(float)) &&
 604                                     (info->num_fields  == 1) &&
 605                                     (info->fields[0].field->type->type == MONO_TYPE_R4)) {
 606                                                 printf("[FLOAT4:%f], ", *((float *) (curParm)));
 607                                         break;
 608                                 }
 609
 610                                 if ((info->native_size == sizeof(double)) &&
 611                                     (info->num_fields  == 1) &&
 612                                     (info->fields[0].field->type->type == MONO_TYPE_R8)) {
 613                                         printf("[FLOAT8:%g], ", *((double *) (curParm)));
 614                                         break;
 615                                 }
 616
 617                                 printf("[VALUETYPE:");
 618                                 for (i = 0; i < size; i++)
 619                                         printf("%02x,", *((guint8 *)curParm+i));
 620                                 printf("]");
 621                                 break;
 622                         }
 623                         case MONO_TYPE_TYPEDBYREF: {
 624                                 int i;
 625                                 printf("[TYPEDBYREF:");
 626                                 for (i = 0; i < size; i++)
 627                                         printf("%02x,", *((guint8 *)curParm+i));
 628                                 printf("]");
 629                                 break;
 630                         }
 631                         default :
 632                                 printf("[?? - %d], ",simpleType);
 633                 }
 634         }
 635 }
 636
 637 /*========================= End of Function ========================*/
 638
 639 static int lc = 0;
 640 /*------------------------------------------------------------------*/
 641 /*                                                                  */
 642 /* Name         - enter_method                                      */
 643 /*                                                                  */
 644 /* Function     - Perform tracing of the entry to the current       */
 645 /*                method.                                           */
 646 /*                                                                  */
 647 /*------------------------------------------------------------------*/
 648
 649 static void
 650 enter_method (MonoMethod *method, RegParm *rParm, char *sp)
 651 {
 652         int i, oParm = 0, iParm = 0;
 653         MonoClass *class;
 654         MonoObject *obj;
 655         MonoMethodSignature *sig;
 656         char *fname;
 657         guint32 ip;
 658         CallInfo *cinfo;
 659         ArgInfo *ainfo;
 660         size_data sz;
 661         void *curParm;
 662
 663
 664 lc++;
 665 if (lc > 5000000) {
 666 fseek(stdout, 0L, SEEK_SET);
 667 lc = 0;
 668 }
 669         fname = mono_method_full_name (method, TRUE);
 670         indent (1);
 671         printf ("ENTER: %s(", fname);
 672         g_free (fname);
 673
 674         ip  = (*(guint32 *) (sp+S390_RET_ADDR_OFFSET)) & 0x7fffffff;
 675         printf (") ip: %p sp: %p - ", (gpointer) ip, sp);
 676
 677         if (rParm == NULL)
 678                 return;
 679
 680         sig = mono_method_signature (method);
 681
 682         cinfo = calculate_sizes (sig, &sz, sig->pinvoke);
 683
 684         if (cinfo->struct_ret) {
 685                 printf ("[STRUCTRET:%p], ", (gpointer) rParm->gr[0]);
 686                 iParm = 1;
 687         }
 688
 689         if (sig->hasthis) {
 690                 gpointer *this = (gpointer *) rParm->gr[iParm];
 691                 obj = (MonoObject *) this;
 692                 if (method->klass->valuetype) {
 693                         if (obj) {
 694                                 printf("this:[value:%p:%08x], ",
 695                                        this, *((guint32 *)(this+sizeof(MonoObject))));
 696                         } else
 697                                 printf ("this:[NULL], ");
 698                 } else {
 699                         if (obj) {
 700 //                              class = obj->vtable->klass;
 701 //                              if (class == mono_defaults.string_class) {
 702 //                                      printf ("this:[STRING:%p:%s], ",
 703 //                                              obj, mono_string_to_utf8 ((MonoString *)obj));
 704 //                              } else {
 705 //                                      printf ("this:%p[%s.%s], ",
 706 //                                              obj, class->name_space, class->name);
 707 //                              }
 708 printf("this:%p, ",obj);
 709                         } else
 710                                 printf ("this:NULL, ");
 711                 }
 712                 oParm++;
 713         }
 714
 715         for (i = 0; i < sig->param_count; ++i) {
 716                 ainfo = &cinfo->args[i + oParm];
 717                 switch (ainfo->regtype) {
 718                         case RegTypeGeneral :
 719                                 decodeParm(sig->params[i], &(rParm->gr[ainfo->reg-2]), ainfo->size);
 720                                 break;
 721                         case RegTypeFP :
 722                                 decodeParm(sig->params[i], &(rParm->fp[ainfo->reg]), ainfo->size);
 723                                 break;
 724                         case RegTypeBase :
 725                                 decodeParm(sig->params[i], sp+ainfo->offset, ainfo->size);
 726                                 break;
 727                         case RegTypeStructByVal :
 728                                 if (ainfo->reg != STK_BASE)
 729                                         curParm = &(rParm->gr[ainfo->reg-2]);
 730                                 else
 731                                         curParm = sp+ainfo->offset;
 732
 733                                 if (retFitsInReg (ainfo->vtsize))
 734                                         decodeParm(sig->params[i],
 735                                                    curParm,
 736                                                    ainfo->size);
 737                                 else
 738                                         decodeParm(sig->params[i],
 739                                                    *((char **) curParm),
 740                                                    ainfo->vtsize);
 741                                 break;
 742                         case RegTypeStructByAddr :
 743                                 if (ainfo->reg != STK_BASE)
 744                                         curParm = &(rParm->gr[ainfo->reg-2]);
 745                                 else
 746                                         curParm = sp+ainfo->offset;
 747
 748                                 decodeParm(sig->params[i],
 749                                            *((char **) curParm),
 750                                            ainfo->vtsize);
 751                                 break;
 752
 753                         default :
 754                                 printf("???, ");
 755                 }
 756         }
 757         printf("\n");
 758         g_free(cinfo);
 759 }
 760
 761 /*========================= End of Function ========================*/
 762
 763 /*------------------------------------------------------------------*/
 764 /*                                                                  */
 765 /* Name         - leave_method                                      */
 766 /*                                                                  */
 767 /* Function     -                                                   */
 768 /*                                                                  */
 769 /*------------------------------------------------------------------*/
 770
 771 static void
 772 leave_method (MonoMethod *method, ...)
 773 {
 774         MonoType *type;
 775         char *fname;
 776         guint32 ip;
 777         va_list ap;
 778
 779         va_start(ap, method);
 780
 781         fname = mono_method_full_name (method, TRUE);
 782         indent (-1);
 783         printf ("LEAVE: %s", fname);
 784         g_free (fname);
 785
 786         type = mono_method_signature (method)->ret;
 787
 788 handle_enum:
 789         switch (type->type) {
 790         case MONO_TYPE_VOID:
 791                 break;
 792         case MONO_TYPE_BOOLEAN: {
 793                 int val = va_arg (ap, int);
 794                 if (val)
 795                         printf ("[TRUE:%d]", val);
 796                 else
 797                         printf ("[FALSE]");
 798
 799                 break;
 800         }
 801         case MONO_TYPE_CHAR: {
 802                 int val = va_arg (ap, int);
 803                 printf ("[CHAR:%d]", val);
 804                 break;
 805         }
 806         case MONO_TYPE_I1: {
 807                 int val = va_arg (ap, int);
 808                 printf ("[INT1:%d]", val);
 809                 break;
 810         }
 811         case MONO_TYPE_U1: {
 812                 int val = va_arg (ap, int);
 813                 printf ("[UINT1:%d]", val);
 814                 break;
 815         }
 816         case MONO_TYPE_I2: {
 817                 int val = va_arg (ap, int);
 818                 printf ("[INT2:%d]", val);
 819                 break;
 820         }
 821         case MONO_TYPE_U2: {
 822                 int val = va_arg (ap, int);
 823                 printf ("[UINT2:%d]", val);
 824                 break;
 825         }
 826         case MONO_TYPE_I4: {
 827                 int val = va_arg (ap, int);
 828                 printf ("[INT4:%d]", val);
 829                 break;
 830         }
 831         case MONO_TYPE_U4: {
 832                 int val = va_arg (ap, int);
 833                 printf ("[UINT4:%d]", val);
 834                 break;
 835         }
 836         case MONO_TYPE_I: {
 837                 int val = va_arg (ap, int);
 838                 printf ("[INT:%d]", val);
 839                 printf("]");
 840                 break;
 841         }
 842         case MONO_TYPE_U: {
 843                 int val = va_arg (ap, int);
 844                 printf ("[UINT:%d]", val);
 845                 printf("]");
 846                 break;
 847         }
 848         case MONO_TYPE_STRING: {
 849                 MonoString *s = va_arg (ap, MonoString *);
 850 ;
 851                 if (s) {
 852                         g_assert (((MonoObject *)s)->vtable->klass == mono_defaults.string_class);
 853                         printf ("[STRING:%p:%s]", s, mono_string_to_utf8 (s));
 854                 } else
 855                         printf ("[STRING:null], ");
 856                 break;
 857         }
 858         case MONO_TYPE_CLASS:
 859         case MONO_TYPE_OBJECT: {
 860                 MonoObject *o = va_arg (ap, MonoObject *);
 861
 862 //              if ((o) && (o->vtable)) {
 863 //                      if (o->vtable->klass == mono_defaults.boolean_class) {
 864 //                              printf ("[BOOLEAN:%p:%d]", o, *((guint8 *)o + sizeof (MonoObject)));
 865 //                      } else if  (o->vtable->klass == mono_defaults.int32_class) {
 866 //                              printf ("[INT32:%p:%d]", o, *((gint32 *)((char *)o + sizeof (MonoObject))));
 867 //                      } else if  (o->vtable->klass == mono_defaults.int64_class) {
 868 //                              printf ("[INT64:%p:%lld]", o, *((gint64 *)((char *)o + sizeof (MonoObject))));
 869 //                      } else
 870 //                              printf ("[%s.%s:%p]", o->vtable->klass->name_space, o->vtable->klass->name, o);
 871 //              } else
 872                         printf ("[OBJECT:%p]", o);
 873
 874                 break;
 875         }
 876         case MONO_TYPE_PTR:
 877         case MONO_TYPE_FNPTR:
 878         case MONO_TYPE_ARRAY:
 879         case MONO_TYPE_SZARRAY: {
 880                 gpointer p = va_arg (ap, gpointer);
 881                 printf ("[result=%p]", p);
 882                 break;
 883         }
 884         case MONO_TYPE_I8: {
 885                 gint64 l =  va_arg (ap, gint64);
 886                 printf ("[LONG:%lld]", l);
 887                 break;
 888         }
 889         case MONO_TYPE_U8: {
 890                 guint64 l =  va_arg (ap, guint64);
 891                 printf ("[ULONG:%llu]", l);
 892                 break;
 893         }
 894         case MONO_TYPE_R4: {
 895                 double f;
 896                 f = va_arg (ap, double);
 897                 printf ("[FLOAT4:%g]\n", f);
 898                 break;
 899         }
 900         case MONO_TYPE_R8: {
 901                 double f = va_arg (ap, double);
 902                 printf ("[FLOAT8:%g]\n", f);
 903                 break;
 904         }
 905         case MONO_TYPE_VALUETYPE: {
 906                 MonoMarshalType *info;
 907                 if (type->data.klass->enumtype) {
 908                         type = type->data.klass->enum_basetype;
 909                         goto handle_enum;
 910                 } else {
 911                         guint8 *p = va_arg (ap, gpointer);
 912                         int j, size, align;
 913
 914                         info = mono_marshal_load_type_info (type->data.klass);
 915
 916                         if ((info->native_size == sizeof(float)) &&
 917                             (info->num_fields  == 1) &&
 918                             (info->fields[0].field->type->type == MONO_TYPE_R4)) {
 919                                 double f = va_arg (ap, double);
 920                                 printf("[FLOAT4:%g]\n", (double) f);
 921                                 break;
 922                         }
 923
 924                         if ((info->native_size == sizeof(double)) &&
 925                             (info->num_fields  == 1) &&
 926                             (info->fields[0].field->type->type == MONO_TYPE_R8)) {
 927                                 double f = va_arg (ap, double);
 928                                 printf("[FLOAT8:%g]\n", f);
 929                                 break;
 930                         }
 931
 932                         size = mono_type_size (type, &align);
 933                         switch (size) {
 934                         case 1:
 935                         case 2:
 936                         case 4:
 937                         case 8:
 938                                 printf ("[");
 939                                 for (j = 0; p && j < size; j++)
 940                                         printf ("%02x,", p [j]);
 941                                 printf ("]\n");
 942                                 break;
 943                         default:
 944                                 printf ("[VALUERET]\n");
 945                         }
 946                 }
 947                 break;
 948         }
 949         case MONO_TYPE_TYPEDBYREF: {
 950                 guint8 *p = va_arg (ap, gpointer);
 951                 int j, size, align;
 952                 size = mono_type_size (type, &align);
 953                 switch (size) {
 954                 case 1:
 955                 case 2:
 956                 case 4:
 957                 case 8:
 958                         printf ("[");
 959                         for (j = 0; p && j < size; j++)
 960                                 printf ("%02x,", p [j]);
 961                         printf ("]\n");
 962                         break;
 963                 default:
 964                         printf ("[TYPEDBYREF]\n");
 965                 }
 966         }
 967                 break;
 968         default:
 969                 printf ("(unknown return type %x)",
 970                         mono_method_signature (method)->ret->type);
 971         }
 972
 973         ip = ((gint32) __builtin_return_address (0)) & 0x7fffffff;
 974         printf (" ip: %p\n", (gpointer) ip);
 975 }
 976
 977 /*========================= End of Function ========================*/
 978
 979 /*------------------------------------------------------------------*/
 980 /*                                                                  */
 981 /* Name         - mono_arch_cpu_init                                */
 982 /*                                                                  */
 983 /* Function     - Perform CPU specific initialization to execute    */
 984 /*                managed code.                                     */
 985 /*                                                                  */
 986 /*------------------------------------------------------------------*/
 987
 988 void
 989 mono_arch_cpu_init (void)
 990 {
 991         guint mode = 1;
 992
 993         /*--------------------------------------*/
 994         /* Set default rounding mode for FP     */
 995         /*--------------------------------------*/
 996         __asm__ ("SRNM\t%0\n\t"
 997                 : : "m" (mode));
 998 }
 999
1000 /*========================= End of Function ========================*/
1001
1002 /*------------------------------------------------------------------*/
1003 /*                                                                  */
1004 /* Name         - mono_arch_cpu_optimizazions                       */
1005 /*                                                                  */
1006 /* Function     - Returns the optimizations supported on this CPU   */
1007 /*                                                                  */
1008 /*------------------------------------------------------------------*/
1009
1010 guint32
1011 mono_arch_cpu_optimizazions (guint32 *exclude_mask)
1012 {
1013         guint32 opts = 0;
1014
1015         /*----------------------------------------------------------*/
1016         /* no s390-specific optimizations yet                       */
1017         /*----------------------------------------------------------*/
1018         *exclude_mask = MONO_OPT_INLINE|MONO_OPT_LINEARS;
1019 //      *exclude_mask = MONO_OPT_INLINE;
1020         return opts;
1021 }
1022
1023 /*========================= End of Function ========================*/
1024
1025 /*------------------------------------------------------------------*/
1026 /*                                                                  */
1027 /* Name         -                                                   */
1028 /*                                                                  */
1029 /* Function     -                                                   */
1030 /*                                                                  */
1031 /*------------------------------------------------------------------*/
1032
1033 static gboolean
1034 is_regsize_var (MonoType *t) {
1035         if (t->byref)
1036                 return TRUE;
1037         switch (mono_type_get_underlying_type (t)->type) {
1038         case MONO_TYPE_I4:
1039         case MONO_TYPE_U4:
1040         case MONO_TYPE_I:
1041         case MONO_TYPE_U:
1042                 return TRUE;
1043         case MONO_TYPE_OBJECT:
1044         case MONO_TYPE_STRING:
1045         case MONO_TYPE_CLASS:
1046         case MONO_TYPE_SZARRAY:
1047         case MONO_TYPE_ARRAY:
1048                 return FALSE;
1049         case MONO_TYPE_VALUETYPE:
1050                 if (t->data.klass->enumtype)
1051                         return is_regsize_var (t->data.klass->enum_basetype);
1052                 return FALSE;
1053         }
1054         return FALSE;
1055 }
1056
1057 /*========================= End of Function ========================*/
1058
1059 /*------------------------------------------------------------------*/
1060 /*                                                                  */
1061 /* Name         - mono_arch_get_allocatable_int_vars                */
1062 /*                                                                  */
1063 /* Function     -                                                   */
1064 /*                                                                  */
1065 /*------------------------------------------------------------------*/
1066
1067 GList *
1068 mono_arch_get_allocatable_int_vars (MonoCompile *cfg)
1069 {
1070         GList *vars = NULL;
1071         int i;
1072
1073         for (i = 0; i < cfg->num_varinfo; i++) {
1074                 MonoInst *ins = cfg->varinfo [i];
1075                 MonoMethodVar *vmv = MONO_VARINFO (cfg, i);
1076
1077                 /* unused vars */
1078                 if (vmv->range.first_use.abs_pos >= vmv->range.last_use.abs_pos)
1079                         continue;
1080
1081                 if (ins->flags & (MONO_INST_VOLATILE|MONO_INST_INDIRECT) ||
1082                     (ins->opcode != OP_LOCAL && ins->opcode != OP_ARG))
1083                         continue;
1084
1085                 /* we can only allocate 32 bit values */
1086                 if (is_regsize_var (ins->inst_vtype)) {
1087                         g_assert (MONO_VARINFO (cfg, i)->reg == -1);
1088                         g_assert (i == vmv->idx);
1089                         vars = mono_varlist_insert_sorted (cfg, vars, vmv, FALSE);
1090                 }
1091         }
1092
1093         return vars;
1094 }
1095
1096 /*========================= End of Function ========================*/
1097
1098 /*------------------------------------------------------------------*/
1099 /*                                                                  */
1100 /* Name         - mono_arch_global_int_regs                         */
1101 /*                                                                  */
1102 /* Function     - Return a list of usable integer registers.        */
1103 /*                                                                  */
1104 /*------------------------------------------------------------------*/
1105
1106 GList *
1107 mono_arch_get_global_int_regs (MonoCompile *cfg)
1108 {
1109         GList *regs = NULL;
1110         MonoMethodHeader *header;
1111         int i, top = 13;
1112
1113         header = mono_method_get_header (cfg->method);
1114         if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
1115                 cfg->frame_reg = s390_r11;
1116
1117         for (i = 8; i < top; ++i) {
1118                 if (cfg->frame_reg != i)
1119                         regs = g_list_prepend (regs, GUINT_TO_POINTER (i));
1120         }
1121
1122         return regs;
1123 }
1124
1125 /*========================= End of Function ========================*/
1126
1127 /*------------------------------------------------------------------*/
1128 /*                                                                  */
1129 /* Name         -  mono_arch_flush_icache                           */
1130 /*                                                                  */
1131 /* Function     -  Flush the CPU icache.                            */
1132 /*                                                                  */
1133 /*------------------------------------------------------------------*/
1134
1135 void
1136 mono_arch_flush_icache (guint8 *code, gint size)
1137 {
1138 }
1139
1140 /*========================= End of Function ========================*/
1141
1142 /*------------------------------------------------------------------*/
1143 /*                                                                  */
1144 /* Name         - add_general                                       */
1145 /*                                                                  */
1146 /* Function     - Determine code and stack size incremements for a  */
1147 /*                parameter.                                        */
1148 /*                                                                  */
1149 /*------------------------------------------------------------------*/
1150
1151 static void inline
1152 add_general (guint *gr, size_data *sz, ArgInfo *ainfo, gboolean simple)
1153 {
1154         if (simple) {
1155                 if (*gr > S390_LAST_ARG_REG) {
1156                         sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1157                         ainfo->offset   = sz->stack_size;
1158                         ainfo->reg      = STK_BASE;
1159                         ainfo->regtype  = RegTypeBase;
1160                         sz->stack_size += sizeof(int);
1161                         sz->local_size += sizeof(int);
1162                         sz->offStruct  += sizeof(int);
1163                         sz->code_size  += 12;
1164                 } else {
1165                         ainfo->reg      = *gr;
1166                         sz->code_size  += 8;
1167                 }
1168         } else {
1169                 if (*gr > S390_LAST_ARG_REG - 1) {
1170                         sz->stack_size  = S390_ALIGN(sz->stack_size, S390_STACK_ALIGNMENT);
1171                         ainfo->offset   = sz->stack_size;
1172                         ainfo->reg      = STK_BASE;
1173                         ainfo->regtype  = RegTypeBase;
1174                         sz->stack_size += sizeof(long long);
1175                         sz->local_size += sizeof(long long);
1176                         sz->offStruct  += sizeof(long long);
1177                         sz->code_size  += 10;
1178                 } else {
1179                         ainfo->reg      = *gr;
1180                         sz->code_size  += 8;
1181                 }
1182                 (*gr) ++;
1183         }
1184         (*gr) ++;
1185 }
1186
1187 /*========================= End of Function ========================*/
1188
1189 /*------------------------------------------------------------------*/
1190 /*                                                                  */
1191 /* Name         - add_stackParm                                     */
1192 /*                                                                  */
1193 /* Function     - Determine code and stack size incremements for a  */
1194 /*                parameter.                                        */
1195 /*                                                                  */
1196 /*------------------------------------------------------------------*/
1197
1198 static void inline
1199 add_stackParm (guint *gr, size_data *sz, ArgInfo *ainfo, gint size)
1200 {
1201         if (*gr > S390_LAST_ARG_REG) {
1202                 sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1203                 ainfo->reg      = STK_BASE;
1204                 sz->parm_size  += sizeof(gpointer);
1205                 sz->offStruct  += sizeof(gpointer);
1206         } else {
1207                 ainfo->reg      = *gr;
1208         }
1209         (*gr) ++;
1210         ainfo->offset   = sz->stack_size;
1211         ainfo->offparm  = sz->offset;
1212         sz->offset      = S390_ALIGN(sz->offset+size, sizeof(long));
1213         ainfo->size     = size;
1214         ainfo->regtype  = RegTypeStructByAddr;
1215         ainfo->vtsize   = size;
1216         sz->parm_size  += size;
1217 }
1218
1219 /*========================= End of Function ========================*/
1220
1221 /*------------------------------------------------------------------*/
1222 /*                                                                  */
1223 /* Name         - add_float                                         */
1224 /*                                                                  */
1225 /* Function     - Determine code and stack size incremements for a  */
1226 /*                float parameter.                                  */
1227 /*                                                                  */
1228 /*------------------------------------------------------------------*/
1229
1230 static void inline
1231 add_float (guint *fr,  size_data *sz, ArgInfo *ainfo)
1232 {
1233         if ((*fr) <= S390_LAST_FPARG_REG) {
1234                 ainfo->regtype = RegTypeFP;
1235                 ainfo->reg     = *fr;
1236                 sz->code_size += 4;
1237                 (*fr) += 2;
1238         }
1239         else {
1240                 ainfo->offset   = sz->stack_size;
1241                 ainfo->reg      = STK_BASE;
1242                 ainfo->regtype  = RegTypeBase;
1243                 sz->code_size  += 4;
1244                 sz->stack_size += ainfo->size;
1245                 sz->local_size += ainfo->size;
1246                 sz->offStruct  += ainfo->size;
1247         }
1248 }
1249
1250 /*========================= End of Function ========================*/
1251
1252 /*------------------------------------------------------------------*/
1253 /*                                                                  */
1254 /* Name         - calculate_sizes                                   */
1255 /*                                                                  */
1256 /* Function     - Determine the amount of space required for code   */
1257 /*                and stack. In addition determine starting points  */
1258 /*                for stack-based parameters, and area for struct-  */
1259 /*                ures being returned on the stack.                 */
1260 /*                                                                  */
1261 /*------------------------------------------------------------------*/
1262
1263 static CallInfo *
1264 calculate_sizes (MonoMethodSignature *sig, size_data *sz,
1265                  gboolean string_ctor)
1266 {
1267         guint i, fr, gr, size;
1268         int nParm = sig->hasthis + sig->param_count;
1269         guint32 simpletype, align;
1270         CallInfo *cinfo = g_malloc0 (sizeof (CallInfo) + sizeof (ArgInfo) * nParm);
1271
1272         fr                = 0;
1273         gr                = s390_r2;
1274         nParm             = 0;
1275         cinfo->struct_ret = 0;
1276         sz->offset        = 0;
1277         sz->offStruct     = S390_MINIMAL_STACK_SIZE;
1278         sz->retStruct     = 0;
1279         sz->stack_size    = S390_MINIMAL_STACK_SIZE;
1280         sz->code_size     = 0;
1281         sz->parm_size     = 0;
1282         sz->local_size    = 0;
1283
1284         /*----------------------------------------------------------*/
1285         /* We determine the size of the return code/stack in case we*/
1286         /* need to reserve a register to be used to address a stack */
1287         /* area that the callee will use.                           */
1288         /*----------------------------------------------------------*/
1289
1290         simpletype = mono_type_get_underlying_type (sig->ret)->type;
1291 enum_retvalue:
1292         switch (simpletype) {
1293                 case MONO_TYPE_BOOLEAN:
1294                 case MONO_TYPE_I1:
1295                 case MONO_TYPE_U1:
1296                 case MONO_TYPE_I2:
1297                 case MONO_TYPE_U2:
1298                 case MONO_TYPE_CHAR:
1299                 case MONO_TYPE_I4:
1300                 case MONO_TYPE_U4:
1301                 case MONO_TYPE_I:
1302                 case MONO_TYPE_U:
1303                 case MONO_TYPE_CLASS:
1304                 case MONO_TYPE_OBJECT:
1305                 case MONO_TYPE_SZARRAY:
1306                 case MONO_TYPE_ARRAY:
1307                 case MONO_TYPE_PTR:
1308                 case MONO_TYPE_FNPTR:
1309                 case MONO_TYPE_STRING:
1310                         cinfo->ret.reg = s390_r2;
1311                         sz->code_size += 4;
1312                         break;
1313                 case MONO_TYPE_R4:
1314                 case MONO_TYPE_R8:
1315                         cinfo->ret.reg = s390_f0;
1316                         sz->code_size += 4;
1317                         break;
1318                 case MONO_TYPE_I8:
1319                 case MONO_TYPE_U8:
1320                         cinfo->ret.reg = s390_r2;
1321                         sz->code_size += 4;
1322                         break;
1323                 case MONO_TYPE_GENERICINST:
1324                         if (!mono_type_generic_inst_is_valuetype (sig->ret)) {
1325                                 cinfo->ret.reg = s390_r2;
1326                                 sz->code_size += 4;
1327                                 break;
1328                         }
1329                         /* Fall through */
1330                 case MONO_TYPE_VALUETYPE: {
1331                         MonoClass *klass = mono_class_from_mono_type (sig->ret);
1332                         if (sig->ret->data.klass->enumtype) {
1333                                 simpletype = sig->ret->data.klass->enum_basetype->type;
1334                                 goto enum_retvalue;
1335                         }
1336                         if (sig->pinvoke)
1337                                 size = mono_class_native_size (klass, &align);
1338                         else
1339                                 size = mono_class_value_size (klass, &align);
1340
1341                         cinfo->ret.reg    = s390_r2;
1342                         cinfo->struct_ret = 1;
1343                         cinfo->ret.size   = size;
1344                         cinfo->ret.vtsize = size;
1345                         gr++;
1346                         break;
1347                 }
1348                 case MONO_TYPE_TYPEDBYREF:
1349                         size = sizeof (MonoTypedRef);
1350                         cinfo->ret.reg    = s390_r2;
1351                         cinfo->struct_ret = 1;
1352                         cinfo->ret.size   = size;
1353                         cinfo->ret.vtsize = size;
1354                         gr++;
1355                         break;
1356                 case MONO_TYPE_VOID:
1357                         break;
1358                 default:
1359                         g_error ("Can't handle as return value 0x%x", sig->ret->type);
1360         }
1361
1362         if (sig->hasthis) {
1363                 add_general (&gr, sz, cinfo->args+nParm, TRUE);
1364                 cinfo->args[nParm].size = sizeof(gpointer);
1365                 nParm++;
1366         }
1367
1368         /*----------------------------------------------------------*/
1369         /* We determine the size of the parameter code and stack    */
1370         /* requirements by checking the types and sizes of the      */
1371         /* parameters.                                              */
1372         /*----------------------------------------------------------*/
1373
1374         for (i = 0; i < sig->param_count; ++i) {
1375                 /*--------------------------------------------------*/
1376                 /* Handle vararg type calls. All args are put on    */
1377                 /* the stack.                                       */
1378                 /*--------------------------------------------------*/
1379                 if ((sig->call_convention == MONO_CALL_VARARG) &&
1380                     (i == sig->sentinelpos)) {
1381                         gr = S390_LAST_ARG_REG + 1;
1382                         add_general (&gr, sz, &cinfo->sigCookie, TRUE);
1383                 }
1384
1385                 if (sig->params [i]->byref) {
1386                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1387                         cinfo->args[nParm].size = sizeof(gpointer);
1388                         nParm++;
1389                         continue;
1390                 }
1391
1392                 simpletype = mono_type_get_underlying_type(sig->params [i])->type;
1393                 switch (simpletype) {
1394                 case MONO_TYPE_BOOLEAN:
1395                 case MONO_TYPE_I1:
1396                 case MONO_TYPE_U1:
1397                         cinfo->args[nParm].size = sizeof(char);
1398                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1399                         nParm++;
1400                         break;
1401                 case MONO_TYPE_I2:
1402                 case MONO_TYPE_U2:
1403                 case MONO_TYPE_CHAR:
1404                         cinfo->args[nParm].size = sizeof(short);
1405                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1406                         nParm++;
1407                         break;
1408                 case MONO_TYPE_I4:
1409                 case MONO_TYPE_U4:
1410                         cinfo->args[nParm].size = sizeof(int);
1411                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1412                         nParm++;
1413                         break;
1414                 case MONO_TYPE_I:
1415                 case MONO_TYPE_U:
1416                 case MONO_TYPE_PTR:
1417                 case MONO_TYPE_FNPTR:
1418                 case MONO_TYPE_CLASS:
1419                 case MONO_TYPE_OBJECT:
1420                 case MONO_TYPE_STRING:
1421                 case MONO_TYPE_SZARRAY:
1422                 case MONO_TYPE_ARRAY:
1423                         cinfo->args[nParm].size = sizeof(gpointer);
1424                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1425                         nParm++;
1426                         break;
1427                 case MONO_TYPE_I8:
1428                 case MONO_TYPE_U8:
1429                         cinfo->args[nParm].size = sizeof(long long);
1430                         add_general (&gr, sz, cinfo->args+nParm, FALSE);
1431                         nParm++;
1432                         break;
1433                 case MONO_TYPE_R4:
1434                         cinfo->args[nParm].size = sizeof(float);
1435                         add_float (&fr, sz, cinfo->args+nParm);
1436                         nParm++;
1437                         break;
1438                 case MONO_TYPE_R8:
1439                         cinfo->args[nParm].size = sizeof(double);
1440                         add_float (&fr, sz, cinfo->args+nParm);
1441                         nParm++;
1442                         break;
1443                 case MONO_TYPE_GENERICINST:
1444                         if (!mono_type_generic_inst_is_valuetype (sig->params [i])) {
1445                                 cinfo->args[nParm].size = sizeof(gpointer);
1446                                 add_general (&gr, sz, cinfo->args+nParm, TRUE);
1447                                 nParm++;
1448                                 break;
1449                         }
1450                         /* Fall through */
1451                 case MONO_TYPE_VALUETYPE: {
1452                         MonoMarshalType *info;
1453                         MonoClass *klass = mono_class_from_mono_type (sig->params [i]);
1454                         if (sig->pinvoke)
1455                                 size = mono_class_native_size (klass, &align);
1456                         else
1457                                 size = mono_class_value_size (klass, &align);
1458
1459                         info = mono_marshal_load_type_info (klass);
1460
1461                         if ((info->native_size == sizeof(float)) &&
1462                             (info->num_fields  == 1) &&
1463                             (info->fields[0].field->type->type == MONO_TYPE_R4)) {
1464                                 cinfo->args[nParm].size = sizeof(float);
1465                                 add_float(&fr, sz, cinfo->args+nParm);
1466                                 break;
1467                         }
1468
1469                         if ((info->native_size == sizeof(double)) &&
1470                             (info->num_fields  == 1) &&
1471                             (info->fields[0].field->type->type == MONO_TYPE_R8)) {
1472                                 cinfo->args[nParm].size = sizeof(double);
1473                                 add_float(&fr, sz, cinfo->args+nParm);
1474                                 break;
1475                         }
1476
1477                         cinfo->args[nParm].vtsize  = 0;
1478                         cinfo->args[nParm].size    = 0;
1479
1480                         switch (size) {
1481                                 /*----------------------------------*/
1482                                 /* On S/390, structures of size 1,  */
1483                                 /* 2, 4, and 8 bytes are passed in  */
1484                                 /* (a) register(s).                 */
1485                                 /*----------------------------------*/
1486                                 case 0:
1487                                 case 1:
1488                                 case 2:
1489                                 case 4:
1490                                         add_general(&gr, sz, cinfo->args+nParm, TRUE);
1491                                         cinfo->args[nParm].size    = size;
1492                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1493                                         nParm++;
1494                                         sz->local_size            += sizeof(long);
1495                                         break;
1496                                 case 8:
1497                                         add_general(&gr, sz, cinfo->args+nParm, FALSE);
1498                                         cinfo->args[nParm].size    = sizeof(long long);
1499                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1500                                         nParm++;
1501                                         sz->local_size            += sizeof(long);
1502                                         break;
1503                                 default:
1504                                         add_stackParm(&gr, sz, cinfo->args+nParm, size);
1505                                         nParm++;
1506                         }
1507                 }
1508                         break;
1509                 case MONO_TYPE_TYPEDBYREF: {
1510                         int size = sizeof (MonoTypedRef);
1511
1512                         cinfo->args[nParm].vtsize  = 0;
1513                         cinfo->args[nParm].size    = 0;
1514
1515                         switch (size) {
1516                                 /*----------------------------------*/
1517                                 /* On S/390, structures of size 1,  */
1518                                 /* 2, 4, and 8 bytes are passed in  */
1519                                 /* (a) register(s).                 */
1520                                 /*----------------------------------*/
1521                                 case 0:
1522                                 case 1:
1523                                 case 2:
1524                                 case 4:
1525                                         add_general(&gr, sz, cinfo->args+nParm, TRUE);
1526                                         cinfo->args[nParm].size    = size;
1527                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1528                                         nParm++;
1529                                         sz->local_size            += sizeof(long);
1530                                         break;
1531                                 case 8:
1532                                         add_general(&gr, sz, cinfo->args+nParm, FALSE);
1533                                         cinfo->args[nParm].size    = sizeof(long long);
1534                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1535                                         nParm++;
1536                                         sz->local_size            += sizeof(long);
1537                                         break;
1538                                 default:
1539                                         add_stackParm(&gr, sz, cinfo->args+nParm, size);
1540                                         nParm++;
1541                         }
1542                 }
1543                         break;
1544                 default:
1545                         g_error ("Can't trampoline 0x%x", sig->params [i]->type);
1546                 }
1547         }
1548
1549         /*----------------------------------------------------------*/
1550         /* If we are passing a structure back then if it won't be   */
1551         /* in a register(s) then we make room at the end of the     */
1552         /* parameters that may have been placed on the stack        */
1553         /*----------------------------------------------------------*/
1554         if (cinfo->struct_ret) {
1555                 cinfo->ret.offset = sz->stack_size;
1556                 switch (cinfo->ret.size) {
1557                 case 0:
1558                 case 1:
1559                 case 2:
1560                 case 4:
1561                 case 8:
1562                         break;
1563                 default:
1564                         sz->stack_size   += S390_ALIGN(cinfo->ret.size, align);
1565                 }
1566         }
1567
1568         sz->stack_size  = sz->stack_size + sz->local_size + sz->parm_size +
1569                           sz->offset;
1570         sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1571
1572         return (cinfo);
1573 }
1574
1575 /*========================= End of Function ========================*/
1576
1577 /*------------------------------------------------------------------*/
1578 /*                                                                  */
1579 /* Name         - mono_arch_allocate_vars                           */
1580 /*                                                                  */
1581 /* Function     - Set var information according to the calling      */
1582 /*                convention for S/390. The local var stuff should  */
1583 /*                most likely be split in another method.           */
1584 /*                                                                  */
1585 /* Parameter    - @m - Compile unit.                                */
1586 /*                                                                  */
1587 /*------------------------------------------------------------------*/
1588
1589 void
1590 mono_arch_allocate_vars (MonoCompile *cfg)
1591 {
1592         MonoMethodSignature *sig;
1593         MonoMethodHeader *header;
1594         MonoInst *inst;
1595         CallInfo *cinfo;
1596         size_data sz;
1597         int iParm, iVar, offset, size, align, curinst;
1598         int frame_reg = STK_BASE;
1599         int sArg, eArg;
1600
1601         header  = mono_method_get_header (cfg->method);
1602
1603         cfg->flags |= MONO_CFG_HAS_SPILLUP;
1604
1605         /*---------------------------------------------------------*/
1606         /* We use the frame register also for any method that has  */
1607         /* filter clauses. This way, when the handlers are called, */
1608         /* the code will reference local variables using the frame */
1609         /* reg instead of the stack pointer: if we had to restore  */
1610         /* the stack pointer, we'd corrupt the method frames that  */
1611         /* are already on the stack (since filters get called      */
1612         /* before stack unwinding happens) when the filter code    */
1613         /* would call any method.                                  */
1614         /*---------------------------------------------------------*/
1615         if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
1616                 frame_reg = s390_r11;
1617
1618         cfg->frame_reg = frame_reg;
1619
1620         if (frame_reg != STK_BASE)
1621                 cfg->used_int_regs |= 1 << frame_reg;
1622
1623         sig     = mono_method_signature (cfg->method);
1624
1625         cinfo   = calculate_sizes (sig, &sz, sig->pinvoke);
1626
1627         if (cinfo->struct_ret) {
1628                 cfg->ret->opcode = OP_REGVAR;
1629                 cfg->ret->inst_c0 = s390_r2;
1630         } else {
1631                 switch (mono_type_get_underlying_type (sig->ret)->type) {
1632                 case MONO_TYPE_VOID:
1633                         break;
1634                 default:
1635                         cfg->ret->opcode = OP_REGVAR;
1636                         cfg->ret->dreg   = s390_r2;
1637                         break;
1638                 }
1639         }
1640
1641         /*--------------------------------------------------------------*/
1642         /* local vars are at a positive offset from the stack pointer   */
1643         /* also note that if the function uses alloca, we use s390_r11  */
1644         /* to point at the local variables.                             */
1645         /* add parameter area size for called functions                 */
1646         /*--------------------------------------------------------------*/
1647         offset          = (cfg->param_area + S390_MINIMAL_STACK_SIZE);
1648         cfg->sig_cookie = 0;
1649
1650         if (cinfo->struct_ret) {
1651                 inst               = cfg->ret;
1652                 offset             = S390_ALIGN(offset, sizeof(gpointer));
1653                 inst->inst_offset  = offset;
1654                 inst->opcode       = OP_REGOFFSET;
1655                 inst->inst_basereg = frame_reg;
1656                 offset            += sizeof(gpointer);
1657                 if ((sig->call_convention == MONO_CALL_VARARG) &&
1658                     (!retFitsInReg (cinfo->ret.size)))
1659                         cfg->sig_cookie += cinfo->ret.size;
1660         }
1661
1662         if (sig->hasthis) {
1663                 inst = cfg->varinfo [0];
1664                 if (inst->opcode != OP_REGVAR) {
1665                         inst->opcode       = OP_REGOFFSET;
1666                         inst->inst_basereg = frame_reg;
1667                         offset             = S390_ALIGN(offset, sizeof(gpointer));
1668                         inst->inst_offset  = offset;
1669                         offset            += sizeof (gpointer);
1670                 }
1671                 curinst = sArg = 1;
1672         } else {
1673                 curinst = sArg = 0;
1674         }
1675
1676         eArg = sig->param_count + sArg;
1677
1678         if (sig->call_convention == MONO_CALL_VARARG)
1679                 cfg->sig_cookie += S390_MINIMAL_STACK_SIZE;
1680
1681         for (iParm = sArg; iParm < eArg; ++iParm) {
1682                 inst = cfg->varinfo [curinst];
1683                 if (inst->opcode != OP_REGVAR) {
1684                         switch (cinfo->args[iParm].regtype) {
1685                                 case RegTypeStructByAddr :
1686                                 if (cinfo->args[iParm].reg == STK_BASE) {
1687                                         inst->opcode       = OP_S390_LOADARG;
1688                                         inst->inst_basereg = frame_reg;
1689                                         size               = abs(cinfo->args[iParm].vtsize);
1690                                         offset             = S390_ALIGN(offset, sizeof(long));
1691                                         inst->inst_offset  = offset;
1692                                         inst->unused       = cinfo->args[iParm].offset;
1693                                 } else {
1694                                         inst->opcode       = OP_S390_ARGREG;
1695                                         inst->inst_basereg = frame_reg;
1696                                         size               = sizeof(gpointer);
1697                                         offset             = S390_ALIGN(offset, size);
1698                                         inst->inst_offset  = offset;
1699                                         inst->unused       = cinfo->args[iParm].offset;
1700                                 }
1701                                         break;
1702                                 case RegTypeStructByVal :
1703                                         inst->opcode       = OP_S390_ARGPTR;
1704                                         inst->inst_basereg = frame_reg;
1705                                         size               = cinfo->args[iParm].size;
1706                                         offset             = S390_ALIGN(offset, size);
1707                                         inst->inst_offset  = offset;
1708                                         inst->unused       = cinfo->args[iParm].offset;
1709                                         break;
1710                                 default :
1711                                 if (cinfo->args[iParm].reg != STK_BASE) {
1712                                         inst->opcode       = OP_REGOFFSET;
1713                                         inst->inst_basereg = frame_reg;
1714                                         size               = (cinfo->args[iParm].size < 8
1715                                                               ? sizeof(long)
1716                                                               : sizeof(long long));
1717                                         offset             = S390_ALIGN(offset, size);
1718                                         inst->inst_offset  = offset;
1719                                 } else {
1720                                         inst->opcode       = OP_S390_STKARG;
1721                                         inst->inst_basereg = frame_reg;
1722                                         size               = (cinfo->args[iParm].size < 4
1723                                                               ? 4 - cinfo->args[iParm].size
1724                                                               : 0);
1725                                         inst->inst_offset  = cinfo->args[iParm].offset +
1726                                                              size;
1727                                         inst->unused       = 0;
1728                                         size               = sizeof(long);
1729                                 }
1730                         }
1731                         if ((sig->call_convention == MONO_CALL_VARARG) &&
1732                             (cinfo->args[iParm].regtype != RegTypeGeneral) &&
1733                             (iParm < sig->sentinelpos))
1734                                 cfg->sig_cookie += size;
1735
1736                         offset += size;
1737                 }
1738                 curinst++;
1739         }
1740
1741         curinst = cfg->locals_start;
1742         for (iVar = curinst; iVar < cfg->num_varinfo; ++iVar) {
1743                 inst = cfg->varinfo [iVar];
1744                 if ((inst->flags & MONO_INST_IS_DEAD) ||
1745                     (inst->opcode == OP_REGVAR))
1746                         continue;
1747
1748                 /*--------------------------------------------------*/
1749                 /* inst->unused indicates native sized value types, */
1750                 /* this is used by the pinvoke wrappers when they   */
1751                 /* call functions returning structure               */
1752                 /*--------------------------------------------------*/
1753                 if (inst->unused && MONO_TYPE_ISSTRUCT (inst->inst_vtype))
1754                         size = mono_class_native_size (mono_class_from_mono_type(inst->inst_vtype), &align);
1755                 else
1756                         size = mono_type_size (inst->inst_vtype, &align);
1757
1758                 offset             = S390_ALIGN(offset, align);
1759                 inst->inst_offset  = offset;
1760                 inst->opcode       = OP_REGOFFSET;
1761                 inst->inst_basereg = frame_reg;
1762                 offset            += size;
1763                 DEBUG (g_print("allocating local %d to %ld\n", iVar, inst->inst_offset));
1764         }
1765
1766         /*------------------------------------------------------*/
1767         /* Allow space for the trace method stack area if needed*/
1768         /*------------------------------------------------------*/
1769         if (mono_jit_trace_calls != NULL && mono_trace_eval (cfg->method)) {
1770                 offset += S390_TRACE_STACK_SIZE;
1771         }
1772
1773         /*------------------------------------------------------*/
1774         /* Reserve space to save LMF and caller saved registers */
1775         /*------------------------------------------------------*/
1776         if (cfg->method->save_lmf)
1777                 offset += sizeof (MonoLMF);
1778
1779         /*------------------------------------------------------*/
1780         /* align the offset                                     */
1781         /*------------------------------------------------------*/
1782         cfg->stack_offset = S390_ALIGN(offset, S390_STACK_ALIGNMENT);
1783
1784 }
1785
1786 /*========================= End of Function ========================*/
1787
1788 /*------------------------------------------------------------------*/
1789 /*                                                                  */
1790 /* Name         - mono_arch_call_opcode                             */
1791 /*                                                                  */
1792 /* Function     - Take the arguments and generate the arch-specific */
1793 /*                instructions to properly call the function. This  */
1794 /*                includes pushing, moving argments to the correct  */
1795 /*                etc.                                              */
1796 /*                                                                  */
1797 /*------------------------------------------------------------------*/
1798
1799 MonoCallInst*
1800 mono_arch_call_opcode (MonoCompile *cfg, MonoBasicBlock* bb,
1801                        MonoCallInst *call, int is_virtual) {
1802         MonoInst *in;
1803         MonoCallArgParm *arg;
1804         MonoMethodSignature *sig;
1805         int i, n, lParamArea;
1806         CallInfo *cinfo;
1807         ArgInfo *ainfo;
1808         size_data sz;
1809         int stackSize;
1810
1811         sig = call->signature;
1812         n = sig->param_count + sig->hasthis;
1813         DEBUG (g_print ("Call requires: %d parameters\n",n));
1814
1815         cinfo = calculate_sizes (sig, &sz, sig->pinvoke);
1816
1817         stackSize         = sz.stack_size + sz.local_size + sz.parm_size + sz.offset;
1818         call->stack_usage = MAX(stackSize, call->stack_usage);
1819         lParamArea        = MAX((call->stack_usage-S390_MINIMAL_STACK_SIZE-sz.parm_size), 0);
1820         cfg->param_area   = MAX(((signed) cfg->param_area), lParamArea);
1821         cfg->flags       |= MONO_CFG_HAS_CALLS;
1822
1823         if (cinfo->struct_ret)
1824                 call->used_iregs |= 1 << cinfo->ret.reg;
1825
1826         for (i = 0; i < n; ++i) {
1827                 ainfo = cinfo->args + i;
1828
1829                 if ((sig->call_convention == MONO_CALL_VARARG) &&
1830                     (i == sig->sentinelpos)) {
1831                         MonoInst *sigArg;
1832
1833                         cfg->disable_aot = TRUE;
1834                         MONO_INST_NEW (cfg, sigArg, OP_ICONST);
1835                         sigArg->inst_p0 = call->signature;
1836
1837                         MONO_INST_NEW_CALL_ARG (cfg, arg, OP_OUTARG_MEMBASE);
1838                         arg->ins.inst_left  = sigArg;
1839                         arg->ins.inst_right = (MonoInst *) call;
1840                         arg->size           = ainfo->size;
1841                         arg->offset         = cinfo->sigCookie.offset;
1842                         call->used_iregs   |= 1 << ainfo->reg;
1843                         arg->ins.next       = call->out_args;
1844                         call->out_args      = (MonoInst *) arg;
1845                 }
1846
1847                 if (is_virtual && i == 0) {
1848                         /* the argument will be attached to the call instrucion */
1849                         in = call->args [i];
1850                         call->used_iregs |= 1 << ainfo->reg;
1851                 } else {
1852                         MONO_INST_NEW_CALL_ARG (cfg, arg, OP_OUTARG);
1853                         in                  = call->args [i];
1854                         arg->ins.cil_code   = in->cil_code;
1855                         arg->ins.inst_left  = in;
1856                         arg->ins.type       = in->type;
1857                         /* prepend, we'll need to reverse them later */
1858                         arg->ins.next       = call->out_args;
1859                         call->out_args      = (MonoInst *) arg;
1860                         arg->ins.inst_right = (MonoInst *) call;
1861                         if (ainfo->regtype == RegTypeGeneral) {
1862                                 arg->ins.unused   = ainfo->reg;
1863                                 call->used_iregs |= 1 << ainfo->reg;
1864                                 if (arg->ins.type == STACK_I8)
1865                                         call->used_iregs |= 1 << (ainfo->reg + 1);
1866                         } else if (ainfo->regtype == RegTypeStructByAddr) {
1867                                 call->used_iregs |= 1 << ainfo->reg;
1868                                 arg->ins.sreg1    = ainfo->reg;
1869                                 arg->ins.opcode   = OP_OUTARG_VT;
1870                                 arg->size         = -ainfo->vtsize;
1871                                 arg->offset       = ainfo->offset;
1872                                 arg->offPrm       = ainfo->offparm + sz.offStruct;
1873                         } else if (ainfo->regtype == RegTypeStructByVal) {
1874                                 if (ainfo->reg != STK_BASE) {
1875                                         switch (ainfo->size) {
1876                                         case 0:
1877                                         case 1:
1878                                         case 2:
1879                                         case 4:
1880                                                 call->used_iregs |= 1 << ainfo->reg;
1881                                                 break;
1882                                         case 8:
1883                                                 call->used_iregs |= 1 << ainfo->reg;
1884                                                 call->used_iregs |= 1 << (ainfo->reg+1);
1885                                                 break;
1886                                         default:
1887                                                 call->used_iregs |= 1 << ainfo->reg;
1888                                         }
1889                                 }
1890                                 arg->ins.sreg1  = ainfo->reg;
1891                                 arg->ins.opcode = OP_OUTARG_VT;
1892                                 arg->size       = ainfo->size;
1893                                 arg->offset     = ainfo->offset;
1894                                 arg->offPrm     = ainfo->offparm + sz.offStruct;
1895                         } else if (ainfo->regtype == RegTypeBase) {
1896                                 arg->ins.opcode   = OP_OUTARG_MEMBASE;
1897                                 arg->ins.sreg1    = ainfo->reg;
1898                                 arg->size         = ainfo->size;
1899                                 arg->offset       = ainfo->offset;
1900                                 call->used_iregs |= 1 << ainfo->reg;
1901                         } else if (ainfo->regtype == RegTypeFP) {
1902                                 arg->ins.unused   = ainfo->reg;
1903                                 call->used_fregs |= 1 << ainfo->reg;
1904                                 if (ainfo->size == 4)
1905                                         arg->ins.opcode = OP_OUTARG_R4;
1906                                 else
1907                                         arg->ins.opcode = OP_OUTARG_R8;
1908                         } else {
1909                                 g_assert_not_reached ();
1910                         }
1911                 }
1912         }
1913         /*
1914          * Reverse the call->out_args list.
1915          */
1916         {
1917                 MonoInst *prev = NULL, *list = call->out_args, *next;
1918                 while (list) {
1919                         next = list->next;
1920                         list->next = prev;
1921                         prev = list;
1922                         list = next;
1923                 }
1924                 call->out_args = prev;
1925         }
1926
1927         g_free (cinfo);
1928         return call;
1929 }
1930
1931 /*========================= End of Function ========================*/
1932
1933 /*------------------------------------------------------------------*/
1934 /*                                                                  */
1935 /* Name         - mono_arch_instrument_mem_needs                    */
1936 /*                                                                  */
1937 /* Function     - Allow tracing to work with this interface (with   */
1938 /*                an optional argument).                            */
1939 /*                                                                  */
1940 /*------------------------------------------------------------------*/
1941
1942 void
1943 mono_arch_instrument_mem_needs (MonoMethod *method, int *stack, int *code)
1944 {
1945         /* no stack room needed now (may be needed for FASTCALL-trace support) */
1946         *stack = 0;
1947         /* split prolog-epilog requirements? */
1948         *code = 50; /* max bytes needed: check this number */
1949 }
1950
1951 /*========================= End of Function ========================*/
1952
1953 /*------------------------------------------------------------------*/
1954 /*                                                                  */
1955 /* Name         - mono_arch_instrument_prolog                       */
1956 /*                                                                  */
1957 /* Function     - Create an "instrumented" prolog.                  */
1958 /*                                                                  */
1959 /*------------------------------------------------------------------*/
1960
1961 void*
1962 mono_arch_instrument_prolog (MonoCompile *cfg, void *func, void *p,
1963                              gboolean enable_arguments)
1964 {
1965         guchar  *code = p;
1966         int     parmOffset,
1967                 fpOffset,
1968                 baseReg;
1969
1970         parmOffset = cfg->stack_usage - S390_TRACE_STACK_SIZE;
1971         if (cfg->method->save_lmf)
1972                 parmOffset -= sizeof(MonoLMF);
1973         fpOffset   = parmOffset + (5*sizeof(gint32));
1974         if (fpOffset > 4096) {
1975                 s390_lr (code, s390_r12, STK_BASE);
1976                 baseReg = s390_r12;
1977                 while (fpOffset > 4096) {
1978                         s390_ahi (code, baseReg, 4096);
1979                         fpOffset   -= 4096;
1980                         parmOffset -= 4096;
1981                 }
1982         } else {
1983                 baseReg = STK_BASE;
1984         }
1985
1986         s390_stm  (code, s390_r2, s390_r6, baseReg, parmOffset);
1987         s390_std  (code, s390_f0, 0, baseReg, fpOffset);
1988         s390_std  (code, s390_f1, 0, baseReg, fpOffset+sizeof(gdouble));
1989         s390_std  (code, s390_f2, 0, baseReg, fpOffset+2*sizeof(gdouble));
1990         s390_basr (code, s390_r13, 0);
1991         s390_j    (code, 6);
1992         s390_word (code, cfg->method);
1993         s390_word (code, func);
1994         s390_l    (code, s390_r2, 0, s390_r13, 4);
1995         s390_la   (code, s390_r3, 0, baseReg, parmOffset);
1996         s390_lr   (code, s390_r4, STK_BASE);
1997         s390_ahi  (code, s390_r4, cfg->stack_usage);
1998         s390_l    (code, s390_r1, 0, s390_r13, 8);
1999         s390_basr (code, s390_r14, s390_r1);
2000         s390_ld   (code, s390_f2, 0, baseReg, fpOffset+2*sizeof(gdouble));
2001         s390_ld   (code, s390_f1, 0, baseReg, fpOffset+sizeof(gdouble));
2002         s390_ld   (code, s390_f0, 0, baseReg, fpOffset);
2003         s390_lm   (code, s390_r2, s390_r6, baseReg, parmOffset);
2004
2005         return code;
2006 }
2007
2008 /*========================= End of Function ========================*/
2009
2010 /*------------------------------------------------------------------*/
2011 /*                                                                  */
2012 /* Name         - mono_arch_instrument_epilog                       */
2013 /*                                                                  */
2014 /* Function     - Create an epilog that will handle the returned    */
2015 /*                values used in instrumentation.                   */
2016 /*                                                                  */
2017 /*------------------------------------------------------------------*/
2018
2019 void*
2020 mono_arch_instrument_epilog (MonoCompile *cfg, void *func, void *p, gboolean enable_arguments)
2021 {
2022         guchar     *code = p;
2023         int        save_mode = SAVE_NONE,
2024                    saveOffset;
2025         MonoMethod *method = cfg->method;
2026         int        rtype = mono_type_get_underlying_type (mono_method_signature (method)->ret)->type;
2027
2028         saveOffset = cfg->stack_usage - S390_TRACE_STACK_SIZE;
2029         if (method->save_lmf)
2030                 saveOffset -= sizeof(MonoLMF);
2031
2032 handle_enum:
2033         switch (rtype) {
2034         case MONO_TYPE_VOID:
2035                 /* special case string .ctor icall */
2036                 if (strcmp (".ctor", method->name) && method->klass == mono_defaults.string_class)
2037                         save_mode = SAVE_ONE;
2038                 else
2039                         save_mode = SAVE_NONE;
2040                 break;
2041         case MONO_TYPE_I8:
2042         case MONO_TYPE_U8:
2043                 save_mode = SAVE_TWO;
2044                 break;
2045         case MONO_TYPE_R4:
2046                 save_mode = SAVE_R4;
2047                 break;
2048         case MONO_TYPE_R8:
2049                 save_mode = SAVE_R8;
2050                 break;
2051         case MONO_TYPE_VALUETYPE:
2052                 if (mono_method_signature (method)->ret->data.klass->enumtype) {
2053                         rtype = mono_method_signature (method)->ret->data.klass->enum_basetype->type;
2054                         goto handle_enum;
2055                 }
2056                 save_mode = SAVE_STRUCT;
2057                 break;
2058         default:
2059                 save_mode = SAVE_ONE;
2060                 break;
2061         }
2062
2063         switch (save_mode) {
2064         case SAVE_TWO:
2065                 s390_stm (code, s390_r2, s390_r3, cfg->frame_reg, saveOffset);
2066                 if (enable_arguments) {
2067                         s390_lr (code, s390_r4, s390_r3);
2068                         s390_lr (code, s390_r3, s390_r2);
2069                 }
2070                 break;
2071         case SAVE_ONE:
2072                 s390_st (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2073                 if (enable_arguments) {
2074                         s390_lr (code, s390_r3, s390_r2);
2075                 }
2076                 break;
2077         case SAVE_R4:
2078                 s390_std (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2079                 if (enable_arguments) {
2080                         s390_ldebr (code, s390_f0, s390_f0);
2081                 }
2082                 break;
2083         case SAVE_R8:
2084                 s390_std (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2085                 break;
2086         case SAVE_STRUCT:
2087                 s390_st (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2088                 if (enable_arguments) {
2089                         s390_l (code, s390_r3, 0, cfg->frame_reg,
2090                                 S390_MINIMAL_STACK_SIZE+cfg->param_area);
2091                 }
2092                 break;
2093         case SAVE_NONE:
2094         default:
2095                 break;
2096         }
2097
2098         s390_basr (code, s390_r13, 0);
2099         s390_j    (code, 6);
2100         s390_word (code, cfg->method);
2101         s390_word (code, func);
2102         s390_l    (code, s390_r2, 0, s390_r13, 4);
2103         s390_l    (code, s390_r1, 0, s390_r13, 8);
2104         s390_basr (code, s390_r14, s390_r1);
2105
2106         switch (save_mode) {
2107         case SAVE_TWO:
2108                 s390_lm  (code, s390_r2, s390_r3, cfg->frame_reg, saveOffset);
2109                 break;
2110         case SAVE_ONE:
2111                 s390_l   (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2112                 break;
2113         case SAVE_R4:
2114         case SAVE_R8:
2115                 s390_ld  (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2116                 break;
2117         case SAVE_STRUCT:
2118                 s390_l   (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2119                 break;
2120         case SAVE_NONE:
2121         default:
2122                 break;
2123         }
2124
2125         return code;
2126 }
2127
2128 /*========================= End of Function ========================*/
2129
2130 /*------------------------------------------------------------------*/
2131 /*                                                                  */
2132 /* Name         - peephole_pass                                     */
2133 /*                                                                  */
2134 /* Function     - Form a peephole pass at the code looking for      */
2135 /*                simple optimizations.                             */
2136 /*                                                                  */
2137 /*------------------------------------------------------------------*/
2138
2139 static void
2140 peephole_pass (MonoCompile *cfg, MonoBasicBlock *bb)
2141 {
2142         MonoInst *ins, *last_ins = NULL;
2143         ins = bb->code;
2144
2145         while (ins) {
2146
2147                 switch (ins->opcode) {
2148                 case OP_MUL_IMM:
2149                         /* remove unnecessary multiplication with 1 */
2150                         if (ins->inst_imm == 1) {
2151                                 if (ins->dreg != ins->sreg1) {
2152                                         ins->opcode = OP_MOVE;
2153                                 } else {
2154                                         last_ins->next = ins->next;
2155                                         ins = ins->next;
2156                                         continue;
2157                                 }
2158                         }
2159                         break;
2160                 case OP_LOAD_MEMBASE:
2161                 case OP_LOADI4_MEMBASE:
2162                         /*
2163                          * OP_STORE_MEMBASE_REG reg, offset(basereg)
2164                          * OP_LOAD_MEMBASE offset(basereg), reg
2165                          */
2166                         if (last_ins && (last_ins->opcode == OP_STOREI4_MEMBASE_REG
2167                                          || last_ins->opcode == OP_STORE_MEMBASE_REG) &&
2168                             ins->inst_basereg == last_ins->inst_destbasereg &&
2169                             ins->inst_offset == last_ins->inst_offset) {
2170                                 if (ins->dreg == last_ins->sreg1) {
2171                                         last_ins->next = ins->next;
2172                                         ins = ins->next;
2173                                         continue;
2174                                 } else {
2175                                         ins->opcode = OP_MOVE;
2176                                         ins->sreg1 = last_ins->sreg1;
2177                                 }
2178
2179                         /*
2180                          * Note: reg1 must be different from the basereg in the second load
2181                          * OP_LOAD_MEMBASE offset(basereg), reg1
2182                          * OP_LOAD_MEMBASE offset(basereg), reg2
2183                          * -->
2184                          * OP_LOAD_MEMBASE offset(basereg), reg1
2185                          * OP_MOVE reg1, reg2
2186                          */
2187                         } if (last_ins && (last_ins->opcode == OP_LOADI4_MEMBASE
2188                                            || last_ins->opcode == OP_LOAD_MEMBASE) &&
2189                               ins->inst_basereg != last_ins->dreg &&
2190                               ins->inst_basereg == last_ins->inst_basereg &&
2191                               ins->inst_offset == last_ins->inst_offset) {
2192
2193                                 if (ins->dreg == last_ins->dreg) {
2194                                         last_ins->next = ins->next;
2195                                         ins = ins->next;
2196                                         continue;
2197                                 } else {
2198                                         ins->opcode = OP_MOVE;
2199                                         ins->sreg1 = last_ins->dreg;
2200                                 }
2201
2202                                 //g_assert_not_reached ();
2203
2204 #if 0
2205                         /*
2206                          * OP_STORE_MEMBASE_IMM imm, offset(basereg)
2207                          * OP_LOAD_MEMBASE offset(basereg), reg
2208                          * -->
2209                          * OP_STORE_MEMBASE_IMM imm, offset(basereg)
2210                          * OP_ICONST reg, imm
2211                          */
2212                         } else if (last_ins && (last_ins->opcode == OP_STOREI4_MEMBASE_IMM
2213                                                 || last_ins->opcode == OP_STORE_MEMBASE_IMM) &&
2214                                    ins->inst_basereg == last_ins->inst_destbasereg &&
2215                                    ins->inst_offset == last_ins->inst_offset) {
2216                                 //static int c = 0; printf ("MATCHX %s %d\n", cfg->method->name,c++);
2217                                 ins->opcode = OP_ICONST;
2218                                 ins->inst_c0 = last_ins->inst_imm;
2219                                 g_assert_not_reached (); // check this rule
2220 #endif
2221                         }
2222                         break;
2223                 case OP_LOADU1_MEMBASE:
2224                 case OP_LOADI1_MEMBASE:
2225                         if (last_ins && (last_ins->opcode == OP_STOREI1_MEMBASE_REG) &&
2226                                         ins->inst_basereg == last_ins->inst_destbasereg &&
2227                                         ins->inst_offset == last_ins->inst_offset) {
2228                                 if (ins->dreg == last_ins->sreg1) {
2229                                         last_ins->next = ins->next;
2230                                         ins = ins->next;
2231                                         continue;
2232                                 } else {
2233                                         //static int c = 0; printf ("MATCHX %s %d\n", cfg->method->name,c++);
2234                                         ins->opcode = OP_MOVE;
2235                                         ins->sreg1 = last_ins->sreg1;
2236                                 }
2237                         }
2238                         break;
2239                 case OP_LOADU2_MEMBASE:
2240                 case OP_LOADI2_MEMBASE:
2241                         if (last_ins && (last_ins->opcode == OP_STOREI2_MEMBASE_REG) &&
2242                                         ins->inst_basereg == last_ins->inst_destbasereg &&
2243                                         ins->inst_offset == last_ins->inst_offset) {
2244                                 if (ins->dreg == last_ins->sreg1) {
2245                                         last_ins->next = ins->next;
2246                                         ins = ins->next;
2247                                         continue;
2248                                 } else {
2249                                         ins->opcode = OP_MOVE;
2250                                         ins->sreg1 = last_ins->sreg1;
2251                                 }
2252                         }
2253                         break;
2254                 case CEE_CONV_I4:
2255                 case CEE_CONV_U4:
2256                 case OP_MOVE:
2257                         /*
2258                          * OP_MOVE reg, reg
2259                          */
2260                         if (ins->dreg == ins->sreg1) {
2261                                 if (last_ins)
2262                                         last_ins->next = ins->next;
2263                                 ins = ins->next;
2264                                 continue;
2265                         }
2266                         /*
2267                          * OP_MOVE sreg, dreg
2268                          * OP_MOVE dreg, sreg
2269                          */
2270                         if (last_ins && last_ins->opcode == OP_MOVE &&
2271                             ins->sreg1 == last_ins->dreg &&
2272                             ins->dreg == last_ins->sreg1) {
2273                                 last_ins->next = ins->next;
2274                                 ins = ins->next;
2275                                 continue;
2276                         }
2277                         break;
2278                 }
2279                 last_ins = ins;
2280                 ins = ins->next;
2281         }
2282         bb->last_ins = last_ins;
2283 }
2284
2285 /*========================= End of Function ========================*/
2286
2287 /*------------------------------------------------------------------*/
2288 /*                                                                  */
2289 /* Name         - mono_arch_local_regalloc.                         */
2290 /*                                                                  */
2291 /* Function     - We first scan the list of instructions and we     */
2292 /*                save the liveness information of each register    */
2293 /*                (when the register is first used, when its value  */
2294 /*                is set etc.). We also reverse the list of instr-  */
2295 /*                uctions (in the InstList list) because assigning  */
2296 /*                registers backwards allows for more tricks to be  */
2297 /*                used.                                             */
2298 /*                                                                  */
2299 /*------------------------------------------------------------------*/
2300
2301 void
2302 mono_arch_local_regalloc (MonoCompile *cfg, MonoBasicBlock *bb)
2303 {
2304         mono_local_regalloc(cfg, bb);
2305 }
2306
2307 /*========================= End of Function ========================*/
2308
2309 /*------------------------------------------------------------------*/
2310 /*                                                                  */
2311 /* Name         - emit_float_to_int                                 */
2312 /*                                                                  */
2313 /* Function     - Create instructions which will convert a floating */
2314 /*                point value to integer.                           */
2315 /*                                                                  */
2316 /*------------------------------------------------------------------*/
2317
2318 static guchar*
2319 emit_float_to_int (MonoCompile *cfg, guchar *code, int dreg, int sreg, int size, gboolean is_signed)
2320 {
2321         /* sreg is a float, dreg is an integer reg. */
2322         if (is_signed) {
2323                 s390_cfdbr (code, dreg, 5, sreg);
2324                 switch (size) {
2325                         case 1:
2326                                 s390_lhi  (code, s390_r0, 0);
2327                                 s390_lhi  (code, s390_r13, 0xff);
2328                                 s390_ltr  (code, dreg, dreg);
2329                                 s390_jnl  (code, 4);
2330                                 s390_lhi  (code, s390_r0, 0x80);
2331                                 s390_nr   (code, dreg, s390_r13);
2332                                 s390_or   (code, dreg, s390_r0);
2333                                 break;
2334                 }
2335         } else {
2336                 short *o[1];
2337                 s390_basr   (code, s390_r13, 0);
2338                 s390_j      (code, 10);
2339                 s390_llong  (code, 0x41e0000000000000);
2340                 s390_llong  (code, 0x41f0000000000000);
2341                 s390_ldr    (code, s390_f15, sreg);
2342                 s390_cdb    (code, s390_f15, 0, s390_r13, 4);
2343                 s390_jl     (code, 0); CODEPTR(code, o[0]);
2344                 s390_sdb    (code, s390_f15, 0, s390_r13, 12);
2345                 s390_cfdbr  (code, dreg, 7, s390_f15);
2346                 s390_j      (code, 4);
2347                 PTRSLOT(code, o[0]);
2348                 s390_cfdbr  (code, dreg, 5, sreg);
2349                 switch (size) {
2350                         case 1:
2351                                 s390_lhi  (code, s390_r0, 0xff);
2352                                 s390_nr   (code, dreg, s390_r0);
2353                                 break;
2354                         case 2:
2355                                 s390_lhi  (code, s390_r0, -1);
2356                                 s390_srl  (code, s390_r0, 0, 16);
2357                                 s390_nr   (code, dreg, s390_r0);
2358                                 break;
2359                 }
2360         }
2361         return code;
2362 }
2363
2364 /*========================= End of Function ========================*/
2365
2366 /*------------------------------------------------------------------*/
2367 /*                                                                  */
2368 /* Name         - mono_arch_output_basic_block                      */
2369 /*                                                                  */
2370 /* Function     - Perform the "real" work of emitting instructions  */
2371 /*                that will do the work of in the basic block.      */
2372 /*                                                                  */
2373 /*------------------------------------------------------------------*/
2374
2375 void
2376 mono_arch_output_basic_block (MonoCompile *cfg, MonoBasicBlock *bb)
2377 {
2378         MonoInst *ins;
2379         MonoCallInst *call;
2380         guint offset;
2381         guint8 *code = cfg->native_code + cfg->code_len;
2382         MonoInst *last_ins = NULL;
2383         guint last_offset = 0;
2384         int max_len, cpos, src2;
2385
2386         if (cfg->opt & MONO_OPT_PEEPHOLE)
2387                 peephole_pass (cfg, bb);
2388
2389         /* we don't align basic blocks of loops on s390 */
2390
2391         if (cfg->verbose_level > 2)
2392                 g_print ("Basic block %d starting at offset 0x%x\n", bb->block_num, bb->native_offset);
2393
2394         cpos = bb->max_offset;
2395
2396         if (cfg->prof_options & MONO_PROFILE_COVERAGE) {
2397                 //MonoCoverageInfo *cov = mono_get_coverage_info (cfg->method);
2398                 //g_assert (!mono_compile_aot);
2399                 //cpos += 6;
2400                 //if (bb->cil_code)
2401                 //      cov->data [bb->dfn].iloffset = bb->cil_code - cfg->cil_code;
2402                 /* this is not thread save, but good enough */
2403                 /* fixme: howto handle overflows? */
2404                 //x86_inc_mem (code, &cov->data [bb->dfn].count);
2405         }
2406
2407         ins = bb->code;
2408         while (ins) {
2409                 offset = code - cfg->native_code;
2410
2411                 max_len = ((guint8 *)ins_spec [ins->opcode])[MONO_INST_LEN];
2412
2413                 if (offset > (cfg->code_size - max_len - 16)) {
2414                         cfg->code_size *= 2;
2415                         cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
2416                         code = cfg->native_code + offset;
2417                 }
2418
2419                 mono_debug_record_line_number (cfg, ins, offset);
2420
2421                 switch (ins->opcode) {
2422                 case OP_STOREI1_MEMBASE_IMM: {
2423                         s390_lhi (code, s390_r0, ins->inst_imm);
2424                         if (s390_is_uimm12(ins->inst_offset))
2425                                 s390_stc (code, s390_r0, 0, ins->inst_destbasereg, ins->inst_offset);
2426                         else {
2427                                 s390_basr (code, s390_r13, 0);
2428                                 s390_j    (code, 4);
2429                                 s390_word (code, ins->inst_offset);
2430                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2431                                 s390_stc  (code, s390_r0, s390_r13, ins->inst_destbasereg, 0);
2432                         }
2433                 }
2434                         break;
2435                 case OP_STOREI2_MEMBASE_IMM: {
2436                         s390_lhi (code, s390_r0, ins->inst_imm);
2437                         if (s390_is_uimm12(ins->inst_offset)) {
2438                                 s390_sth (code, s390_r0, 0, ins->inst_destbasereg, ins->inst_offset);
2439                         } else {
2440                                 s390_basr (code, s390_r13, 0);
2441                                 s390_j    (code, 4);
2442                                 s390_word (code, ins->inst_offset);
2443                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2444                                 s390_sth  (code, s390_r0, s390_r13, ins->inst_destbasereg, 0);
2445                         }
2446                 }
2447                         break;
2448                 case OP_STORE_MEMBASE_IMM:
2449                 case OP_STOREI4_MEMBASE_IMM: {
2450                         if (s390_is_imm16(ins->inst_imm)) {
2451                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2452                         } else {
2453                                 s390_basr (code, s390_r13, 0);
2454                                 s390_j    (code, 4);
2455                                 s390_word (code, ins->inst_imm);
2456                                 s390_l    (code, s390_r0, 0, s390_r13, 4);
2457                         }
2458                         if (s390_is_uimm12(ins->inst_offset)) {
2459                                 s390_st  (code, s390_r0, 0, ins->inst_destbasereg, ins->inst_offset);
2460                         } else {
2461                                 s390_basr (code, s390_r13, 0);
2462                                 s390_j    (code, 4);
2463                                 s390_word (code, ins->inst_offset);
2464                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2465                                 s390_st   (code, s390_r0, s390_r13, ins->inst_destbasereg, 0);
2466                         }
2467                 }
2468                         break;
2469                 case OP_STOREI1_MEMBASE_REG: {
2470                         if (s390_is_uimm12(ins->inst_offset)) {
2471                                 s390_stc  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
2472                         } else {
2473                                 s390_basr (code, s390_r13, 0);
2474                                 s390_j    (code, 4);
2475                                 s390_word (code, ins->inst_offset);
2476                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2477                                 s390_stc  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
2478                         }
2479                 }
2480                         break;
2481                 case OP_STOREI2_MEMBASE_REG: {
2482                         if (s390_is_uimm12(ins->inst_offset)) {
2483                                 s390_sth  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
2484                         } else {
2485                                 s390_basr (code, s390_r13, 0);
2486                                 s390_j    (code, 4);
2487                                 s390_word (code, ins->inst_offset);
2488                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2489                                 s390_sth  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
2490                         }
2491                 }
2492                         break;
2493                 case OP_STORE_MEMBASE_REG:
2494                 case OP_STOREI4_MEMBASE_REG: {
2495                         if (s390_is_uimm12(ins->inst_offset)) {
2496                                 s390_st   (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
2497                         } else {
2498                                 s390_basr (code, s390_r13, 0);
2499                                 s390_j    (code, 4);
2500                                 s390_word (code, ins->inst_offset);
2501                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2502                                 s390_st   (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
2503                         }
2504                 }
2505                         break;
2506                 case CEE_LDIND_I:
2507                 case CEE_LDIND_I4:
2508                 case CEE_LDIND_U4: {
2509                         s390_basr (code, s390_r13, 0);
2510                         s390_j    (code, 4);
2511                         s390_word (code, ins->inst_p0);
2512                         s390_l    (code, s390_r13, 0, s390_r13, 4);
2513                         s390_l    (code, ins->dreg, 0, s390_r13, 0);
2514                 }
2515                         break;
2516                 case OP_LOADU4_MEM:
2517                         g_assert_not_reached ();
2518                         break;
2519                 case OP_LOAD_MEMBASE:
2520                 case OP_LOADI4_MEMBASE:
2521                 case OP_LOADU4_MEMBASE: {
2522                         if (s390_is_uimm12(ins->inst_offset))
2523                                 s390_l    (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
2524                         else {
2525                                 if (s390_is_imm16(ins->inst_offset)) {
2526                                         s390_lhi (code, s390_r13, ins->inst_offset);
2527                                         s390_l   (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
2528                                 } else {
2529                                         s390_basr (code, s390_r13, 0);
2530                                         s390_j    (code, 4);
2531                                         s390_word (code, ins->inst_offset);
2532                                         s390_l    (code, s390_r13, 0, s390_r13, 4);
2533                                         s390_l    (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
2534                                 }
2535                         }
2536                 }
2537                         break;
2538                 case OP_LOADU1_MEMBASE: {
2539                         s390_lhi (code, s390_r0, 0);
2540                         if (s390_is_uimm12(ins->inst_offset))
2541                                 s390_ic   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
2542                         else {
2543                                 s390_basr (code, s390_r13, 0);
2544                                 s390_j    (code, 4);
2545                                 s390_word (code, ins->inst_offset);
2546                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2547                                 s390_ic   (code, s390_r0, s390_r13, ins->inst_basereg, 0);
2548                         }
2549                         s390_lr   (code, ins->dreg, s390_r0);
2550                 }
2551                         break;
2552                 case OP_LOADI1_MEMBASE: {
2553                         s390_lhi (code, s390_r0, 0);
2554                         if (s390_is_uimm12(ins->inst_offset))
2555                                 s390_ic   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
2556                         else {
2557                                 s390_basr (code, s390_r13, 0);
2558                                 s390_j    (code, 4);
2559                                 s390_word (code, ins->inst_offset);
2560                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2561                                 s390_ic   (code, s390_r0, s390_r13, ins->inst_basereg, 0);
2562                         }
2563                         s390_lhi  (code, s390_r13, 0x80);
2564                         s390_nr   (code, s390_r13, s390_r0);
2565                         s390_jz   (code, 5);
2566                         s390_lhi  (code, s390_r13, 0xff00);
2567                         s390_or   (code, s390_r0, s390_r13);
2568                         s390_lr   (code, ins->dreg, s390_r0);
2569                 }
2570                         break;
2571                 case OP_LOADU2_MEMBASE: {
2572                         s390_lhi (code, s390_r0, 0);
2573                         if (s390_is_uimm12(ins->inst_offset))
2574                                 s390_icm  (code, s390_r0, 3, ins->inst_basereg, ins->inst_offset);
2575                         else {
2576                                 s390_basr (code, s390_r13, 0);
2577                                 s390_j    (code, 4);
2578                                 s390_word (code, ins->inst_offset);
2579                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2580                                 s390_ar   (code, s390_r13, ins->inst_basereg);
2581                                 s390_icm  (code, s390_r0, 3, s390_r13, 0);
2582                         }
2583                         s390_lr  (code, ins->dreg, s390_r0);
2584                 }
2585                         break;
2586                 case OP_LOADI2_MEMBASE: {
2587                         s390_lhi (code, s390_r0, 0);
2588                         if (s390_is_uimm12(ins->inst_offset))
2589                                 s390_lh   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
2590                         else {
2591                                 s390_basr (code, s390_r13, 0);
2592                                 s390_j    (code, 4);
2593                                 s390_word (code, ins->inst_offset);
2594                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2595                                 s390_lh   (code, s390_r0, s390_r13, ins->inst_basereg, 0);
2596                         }
2597                         s390_lr  (code, ins->dreg, s390_r0);
2598                 }
2599                         break;
2600                 case CEE_CONV_I1: {
2601                         s390_lhi  (code, s390_r0, 0x80);
2602                         if (ins->dreg != ins->sreg1) {
2603                                 s390_lr   (code, ins->dreg, ins->sreg1);
2604                         }
2605                         s390_nr   (code, s390_r0, ins->sreg1);
2606                         s390_jz   (code, 7);
2607                         s390_lhi  (code, s390_r13, -1);
2608                         s390_sll  (code, s390_r13, 0, 8);
2609                         s390_or   (code, ins->dreg, s390_r13);
2610                 }
2611                         break;
2612                 case CEE_CONV_I2: {
2613                         s390_lhi  (code, s390_r0, 0x80);
2614                         s390_sll  (code, s390_r0, 0, 8);
2615                         if (ins->dreg != ins->sreg1) {
2616                                 s390_lr   (code, ins->dreg, ins->sreg1);
2617                         }
2618                         s390_nr   (code, s390_r0, ins->sreg1);
2619                         s390_jz   (code, 7);
2620                         s390_lhi  (code, s390_r13, -1);
2621                         s390_sll  (code, s390_r13, 0, 16);
2622                         s390_or   (code, ins->dreg, s390_r13);
2623                 }
2624                         break;
2625                 case CEE_CONV_U1: {
2626                         s390_lhi  (code, s390_r0, 0xff);
2627                         if (ins->dreg != ins->sreg1) {
2628                                 s390_lr   (code, ins->dreg, ins->sreg1);
2629                         }
2630                         s390_nr   (code, ins->dreg, s390_r0);
2631                 }
2632                         break;
2633                 case CEE_CONV_U2: {
2634                         s390_lhi  (code, s390_r0, -1);
2635                         s390_sll  (code, s390_r0, 0, 16);
2636                         s390_srl  (code, s390_r0, 0, 16);
2637                         if (ins->dreg != ins->sreg1) {
2638                                 s390_lr   (code, ins->dreg, ins->sreg1);
2639                         }
2640                         s390_nr   (code, ins->dreg, s390_r0);
2641                 }
2642                         break;
2643                 case OP_COMPARE: {
2644                         if ((ins->next) &&
2645                             (((ins->next->opcode >= CEE_BNE_UN) &&
2646                               (ins->next->opcode <= CEE_BLT_UN)) ||
2647                              ((ins->next->opcode >= OP_COND_EXC_NE_UN) &&
2648                               (ins->next->opcode <= OP_COND_EXC_LT_UN)) ||
2649                              ((ins->next->opcode == OP_CLT_UN) ||
2650                               (ins->next->opcode == OP_CGT_UN))))
2651                                 s390_clr  (code, ins->sreg1, ins->sreg2);
2652                         else
2653                                 s390_cr   (code, ins->sreg1, ins->sreg2);
2654                 }
2655                         break;
2656                 case OP_COMPARE_IMM: {
2657                         if (s390_is_imm16 (ins->inst_imm)) {
2658                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2659                                 if ((ins->next) &&
2660                                     (((ins->next->opcode >= CEE_BNE_UN) &&
2661                                       (ins->next->opcode <= CEE_BLT_UN)) ||
2662                                      ((ins->next->opcode >= OP_COND_EXC_NE_UN) &&
2663                                       (ins->next->opcode <= OP_COND_EXC_LT_UN)) ||
2664                                      ((ins->next->opcode == OP_CLT_UN) ||
2665                                       (ins->next->opcode == OP_CGT_UN))))
2666                                         s390_clr  (code, ins->sreg1, s390_r0);
2667                                 else
2668                                         s390_cr   (code, ins->sreg1, s390_r0);
2669                         }
2670                         else {
2671                                 s390_basr (code, s390_r13, 0);
2672                                 s390_j    (code, 4);
2673                                 s390_word (code, ins->inst_imm);
2674                                 if ((ins->next) &&
2675                                     (((ins->next->opcode >= CEE_BNE_UN) &&
2676                                       (ins->next->opcode <= CEE_BLT_UN)) ||
2677                                      ((ins->next->opcode >= OP_COND_EXC_NE_UN) &&
2678                                       (ins->next->opcode <= OP_COND_EXC_LT_UN)) ||
2679                                      ((ins->next->opcode == OP_CLT_UN) ||
2680                                       (ins->next->opcode == OP_CGT_UN))))
2681                                         s390_cl   (code, ins->sreg1, 0, s390_r13, 4);
2682                                 else
2683                                         s390_c    (code, ins->sreg1, 0, s390_r13, 4);
2684                         }
2685                 }
2686                         break;
2687                 case CEE_BREAK: {
2688                         mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS, mono_arch_break);
2689                         s390_brasl (code, s390_r14, 0);
2690                 }
2691                         break;
2692                 case OP_ADDCC: {
2693                         CHECK_SRCDST_COM;
2694                         s390_alr  (code, ins->dreg, src2);
2695                 }
2696                         break;
2697                 case CEE_ADD: {
2698                         CHECK_SRCDST_COM;
2699                         s390_ar   (code, ins->dreg, src2);
2700                 }
2701                         break;
2702                 case OP_ADC: {
2703                         CHECK_SRCDST_COM;
2704                         s390_alcr (code, ins->dreg, src2);
2705                 }
2706                         break;
2707                 case OP_ADD_IMM: {
2708                         if (ins->dreg != ins->sreg1) {
2709                                 s390_lr   (code, ins->dreg, ins->sreg1);
2710                         }
2711                         if ((ins->next) &&
2712                             (ins->next->opcode == OP_ADC_IMM)) {
2713                                 s390_basr (code, s390_r13, 0);
2714                                 s390_j    (code, 4);
2715                                 s390_word (code, ins->inst_imm);
2716                                 s390_a (code, ins->dreg, 0, s390_r13, 4);
2717                         } else {
2718                                 if (s390_is_imm16 (ins->inst_imm)) {
2719                                         s390_ahi  (code, ins->dreg, ins->inst_imm);
2720                                 } else {
2721                                         s390_basr (code, s390_r13, 0);
2722                                         s390_j    (code, 4);
2723                                         s390_word (code, ins->inst_imm);
2724                                         s390_a (code, ins->dreg, 0, s390_r13, 4);
2725                                 }
2726                         }
2727                 }
2728                         break;
2729                 case OP_ADDCC_IMM: {
2730                         if ((ins->next) &&
2731                             (ins->next->opcode == OP_ADC_IMM)) {
2732                                 s390_basr (code, s390_r13, 0);
2733                                 s390_j    (code, 4);
2734                                 s390_word (code, ins->inst_imm);
2735                                 if (ins->dreg != ins->sreg1) {
2736                                         s390_lr   (code, ins->dreg, ins->sreg1);
2737                                 }
2738                                 s390_al   (code, ins->dreg, 0, s390_r13, 4);
2739                         } else {
2740                                 if (s390_is_imm16 (ins->inst_imm)) {
2741                                         if (ins->dreg != ins->sreg1) {
2742                                                 s390_lr   (code, ins->dreg, ins->sreg1);
2743                                         }
2744                                         s390_lhi  (code, s390_r0, ins->inst_imm);
2745                                         s390_alcr (code, ins->dreg, s390_r0);
2746                                 } else {
2747                                         s390_basr (code, s390_r13, 0);
2748                                         s390_j    (code, 4);
2749                                         s390_word (code, ins->inst_imm);
2750                                         if (ins->dreg != ins->sreg1) {
2751                                                 s390_lr   (code, ins->dreg, ins->sreg1);
2752                                         }
2753                                         s390_al   (code, ins->dreg, 0, s390_r13, 4);
2754                                 }
2755                         }
2756                 }
2757                         break;
2758                 case OP_ADC_IMM: {
2759                         if (s390_is_imm16 (ins->inst_imm)) {
2760                                 if (ins->dreg != ins->sreg1) {
2761                                         s390_lr   (code, ins->dreg, ins->sreg1);
2762                                 }
2763                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2764                                 s390_alcr (code, ins->dreg, s390_r0);
2765                         } else {
2766                                 s390_basr (code, s390_r13, 0);
2767                                 s390_j    (code, 4);
2768                                 s390_word (code, ins->inst_imm);
2769                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2770                                 s390_alcr (code, ins->dreg, s390_r13);
2771                         }
2772                 }
2773                         break;
2774                 case CEE_ADD_OVF: {
2775                         CHECK_SRCDST_COM;
2776                         s390_ar   (code, ins->dreg, src2);
2777                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2778                 }
2779                         break;
2780                 case CEE_ADD_OVF_UN: {
2781                         CHECK_SRCDST_COM;
2782                         s390_alr  (code, ins->dreg, src2);
2783                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
2784                 }
2785                         break;
2786                 case OP_LADD: {
2787                         short int *o[1];
2788                         s390_alr  (code, s390_r0, ins->sreg1);
2789                         s390_jnc  (code, 4);
2790                         s390_ahi  (code, s390_r1, 1);
2791                         s390_ar   (code, s390_r1, ins->sreg2);
2792                         s390_lr   (code, ins->dreg, s390_r0);
2793                         s390_lr   (code, ins->dreg+1, s390_r1);
2794                 }
2795                         break;
2796                 case OP_LADD_OVF: {
2797                         short int *o[1];
2798                         s390_alr  (code, s390_r0, ins->sreg1);
2799                         s390_jnc  (code, 0); CODEPTR(code, o[0]);
2800                         s390_ahi  (code, s390_r1, 1);
2801                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2802                         PTRSLOT   (code, o[0]);
2803                         s390_ar   (code, s390_r1, ins->sreg2);
2804                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2805                         s390_lr   (code, ins->dreg, s390_r0);
2806                         s390_lr   (code, ins->dreg+1, s390_r1);
2807                 }
2808                         break;
2809                 case OP_LADD_OVF_UN: {
2810                         s390_alr  (code, s390_r0, ins->sreg1);
2811                         s390_alcr (code, s390_r1, ins->sreg2);
2812                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
2813                         s390_lr   (code, ins->dreg, s390_r0);
2814                         s390_lr   (code, ins->dreg+1, s390_r1);
2815                 }
2816                         break;
2817                 case OP_ADD_OVF_CARRY: {
2818                         CHECK_SRCDST_COM;
2819                         s390_lhi  (code, s390_r0, 0);
2820                         s390_lr   (code, s390_r1, s390_r0);
2821                         s390_alcr (code, s390_r0, s390_r1);
2822                         s390_ar   (code, ins->dreg, src2);
2823                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2824                         s390_ar   (code, ins->dreg, s390_r0);
2825                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2826                 }
2827                         break;
2828                 case OP_ADD_OVF_UN_CARRY: {
2829                         CHECK_SRCDST_COM;
2830                         s390_alcr (code, ins->dreg, src2);
2831                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
2832                 }
2833                         break;
2834                 case OP_SUBCC: {
2835                         CHECK_SRCDST_NCOM;
2836                         s390_slr (code, ins->dreg, src2);
2837                 }
2838                         break;
2839                 case CEE_SUB: {
2840                         CHECK_SRCDST_NCOM;
2841                         s390_sr   (code, ins->dreg, src2);
2842                 }
2843                         break;
2844                 case OP_SBB: {
2845                         CHECK_SRCDST_NCOM;
2846                         s390_slbr (code, ins->dreg, src2);
2847                 }
2848                         break;
2849                 case OP_SUBCC_IMM: {
2850                         if (s390_is_imm16 (-ins->inst_imm)) {
2851                                 if (ins->dreg != ins->sreg1) {
2852                                         s390_lr   (code, ins->dreg, ins->sreg1);
2853                                 }
2854                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2855                                 s390_slr  (code, ins->dreg, s390_r0);
2856                         } else {
2857                                 s390_basr (code, s390_r13, 0);
2858                                 s390_j    (code, 4);
2859                                 s390_word (code, ins->inst_imm);
2860                                 if (ins->dreg != ins->sreg1) {
2861                                         s390_lr   (code, ins->dreg, ins->sreg1);
2862                                 }
2863                                 s390_sl   (code, ins->dreg, 0, s390_r13, 4);
2864                         }
2865                 }
2866                         break;
2867                 case OP_SUB_IMM: {
2868                         if (s390_is_imm16 (-ins->inst_imm)) {
2869                                 if (ins->dreg != ins->sreg1) {
2870                                         s390_lr   (code, ins->dreg, ins->sreg1);
2871                                 }
2872                                 s390_ahi  (code, ins->dreg, -ins->inst_imm);
2873                         } else {
2874                                 s390_basr (code, s390_r13, 0);
2875                                 s390_j    (code, 4);
2876                                 s390_word (code, ins->inst_imm);
2877                                 if (ins->dreg != ins->sreg1) {
2878                                         s390_lr   (code, ins->dreg, ins->sreg1);
2879                                 }
2880                                 s390_s    (code, ins->dreg, 0, s390_r13, 4);
2881                         }
2882                 }
2883                         break;
2884                 case OP_SBB_IMM: {
2885                         if (ins->dreg != ins->sreg1) {
2886                                 s390_lr    (code, ins->dreg, ins->sreg1);
2887                         }
2888                         if (s390_is_imm16 (-ins->inst_imm)) {
2889                                 s390_lhi   (code, s390_r0, ins->inst_imm);
2890                                 s390_slbr  (code, ins->dreg, s390_r0);
2891                         } else {
2892                                 s390_basr (code, s390_r13, 0);
2893                                 s390_j    (code, 4);
2894                                 s390_word (code, ins->inst_imm);
2895                                 s390_slb  (code, ins->dreg, 0, s390_r13, 4);
2896                         }
2897                 }
2898                         break;
2899                 case CEE_SUB_OVF: {
2900                         CHECK_SRCDST_NCOM;
2901                         s390_sr   (code, ins->dreg, src2);
2902                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2903                 }
2904                         break;
2905                 case CEE_SUB_OVF_UN: {
2906                         CHECK_SRCDST_NCOM;
2907                         s390_slr  (code, ins->dreg, src2);
2908                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
2909                 }
2910                         break;
2911                 case OP_LSUB: {
2912                         s390_lr   (code, s390_r14, ins->sreg2);
2913                         s390_slr  (code, s390_r0, ins->sreg1);
2914                         s390_jnl  (code, 4);
2915                         s390_ahi  (code, s390_r14, 1);
2916                         s390_sr   (code, s390_r1, s390_r14);
2917                         s390_lr   (code, ins->dreg, s390_r0);
2918                         s390_lr   (code, ins->dreg+1, s390_r1);
2919                 }
2920                         break;
2921                 case OP_LSUB_OVF: {
2922                         short int *o[1];
2923                         s390_lr   (code, s390_r14, ins->sreg2);
2924                         s390_slr  (code, s390_r0, ins->sreg1);
2925                         s390_jnl  (code, 0); CODEPTR(code, o[0]);
2926                         s390_ahi  (code, s390_r14, 1);
2927                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2928                         PTRSLOT   (code, o[0]);
2929                         s390_sr   (code, s390_r1, s390_r14);
2930                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2931                         s390_lr   (code, ins->dreg, s390_r0);
2932                         s390_lr   (code, ins->dreg+1, s390_r1);
2933                 }
2934                         break;
2935                 case OP_LSUB_OVF_UN: {
2936                         s390_slr  (code, s390_r0, ins->sreg1);
2937                         s390_slbr (code, s390_r1, ins->sreg2);
2938                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, "OverflowException");
2939                         s390_lr   (code, ins->dreg, s390_r0);
2940                         s390_lr   (code, ins->dreg+1, s390_r1);
2941                 }
2942                         break;
2943                 case OP_SUB_OVF_CARRY: {
2944                         CHECK_SRCDST_NCOM;
2945                         s390_lhi  (code, s390_r0, 0);
2946                         s390_lr   (code, s390_r1, s390_r0);
2947                         s390_slbr (code, s390_r0, s390_r1);
2948                         s390_sr   (code, ins->dreg, src2);
2949                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2950                         s390_ar   (code, ins->dreg, s390_r0);
2951                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2952                 }
2953                         break;
2954                 case OP_SUB_OVF_UN_CARRY: {
2955                         CHECK_SRCDST_NCOM;
2956                         s390_slbr (code, ins->dreg, src2);
2957                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
2958                 }
2959                         break;
2960                 case CEE_AND: {
2961                         if (ins->sreg1 == ins->dreg) {
2962                                 s390_nr   (code, ins->dreg, ins->sreg2);
2963                         }
2964                         else {
2965                                 if (ins->sreg2 == ins->dreg) {
2966                                         s390_nr  (code, ins->dreg, ins->sreg1);
2967                                 }
2968                                 else {
2969                                         s390_lr  (code, ins->dreg, ins->sreg1);
2970                                         s390_nr  (code, ins->dreg, ins->sreg2);
2971                                 }
2972                         }
2973                 }
2974                         break;
2975                 case OP_AND_IMM: {
2976                         if (s390_is_imm16 (ins->inst_imm)) {
2977                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2978                                 if (ins->dreg != ins->sreg1) {
2979                                         s390_lr   (code, ins->dreg, ins->sreg1);
2980                                 }
2981                                 s390_nr   (code, ins->dreg, s390_r0);
2982                         } else {
2983                                 s390_basr (code, s390_r13, 0);
2984                                 s390_j    (code, 4);
2985                                 s390_word (code, ins->inst_imm);
2986                                 if (ins->dreg != ins->sreg1) {
2987                                         s390_lr   (code, ins->dreg, ins->sreg1);
2988                                 }
2989                                 s390_n    (code, ins->dreg, 0, s390_r13, 4);
2990                         }
2991                 }
2992                         break;
2993                 case CEE_DIV: {
2994                         s390_lr   (code, s390_r0, ins->sreg1);
2995                         s390_srda (code, s390_r0, 0, 32);
2996                         s390_dr   (code, s390_r0, ins->sreg2);
2997                         s390_lr   (code, ins->dreg, s390_r1);
2998                 }
2999                         break;
3000                 case CEE_DIV_UN: {
3001                         s390_lr   (code, s390_r0, ins->sreg1);
3002                         s390_srdl (code, s390_r0, 0, 32);
3003                         s390_dlr  (code, s390_r0, ins->sreg2);
3004                         s390_lr   (code, ins->dreg, s390_r1);
3005                 }
3006                         break;
3007                 case OP_DIV_IMM: {
3008                         if (s390_is_imm16 (ins->inst_imm)) {
3009                                 s390_lhi  (code, s390_r13, ins->inst_imm);
3010                                 s390_lr   (code, s390_r0, ins->sreg1);
3011                         } else {
3012                                 s390_basr (code, s390_r13, 0);
3013                                 s390_j    (code, 4);
3014                                 s390_word (code, ins->inst_imm);
3015                                 s390_lr   (code, s390_r0, ins->sreg1);
3016                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3017                         }
3018                         s390_srda (code, s390_r0, 0, 32);
3019                         s390_dr   (code, s390_r0, s390_r13);
3020                         s390_lr   (code, ins->dreg, s390_r1);
3021                 }
3022                         break;
3023                 case CEE_REM: {
3024                         s390_lr   (code, s390_r0, ins->sreg1);
3025                         s390_srda (code, s390_r0, 0, 32);
3026                         s390_dr   (code, s390_r0, ins->sreg2);
3027                         s390_lr   (code, ins->dreg, s390_r0);
3028                         break;
3029                 case CEE_REM_UN:
3030                         s390_lr   (code, s390_r0, ins->sreg1);
3031                         s390_srdl (code, s390_r0, 0, 32);
3032                         s390_dlr  (code, s390_r0, ins->sreg2);
3033                         s390_lr   (code, ins->dreg, s390_r0);
3034                 }
3035                         break;
3036                 case OP_REM_IMM: {
3037                         if (s390_is_imm16 (ins->inst_imm)) {
3038                                 s390_lhi  (code, s390_r13, ins->inst_imm);
3039                                 s390_lr   (code, s390_r0, ins->sreg1);
3040                         } else {
3041                                 s390_basr (code, s390_r13, 0);
3042                                 s390_j    (code, 4);
3043                                 s390_word (code, ins->inst_imm);
3044                                 s390_lr   (code, s390_r0, ins->sreg1);
3045                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3046                         }
3047                         s390_srda (code, s390_r0, 0, 32);
3048                         s390_dr   (code, s390_r0, s390_r13);
3049                         s390_lr   (code, ins->dreg, s390_r0);
3050                 }
3051                         break;
3052                 case CEE_OR: {
3053                         if (ins->sreg1 == ins->dreg) {
3054                                 s390_or   (code, ins->dreg, ins->sreg2);
3055                         }
3056                         else {
3057                                 if (ins->sreg2 == ins->dreg) {
3058                                         s390_or  (code, ins->dreg, ins->sreg1);
3059                                 }
3060                                 else {
3061                                         s390_lr  (code, ins->dreg, ins->sreg1);
3062                                         s390_or  (code, ins->dreg, ins->sreg2);
3063                                 }
3064                         }
3065                 }
3066                         break;
3067                 case OP_OR_IMM: {
3068                         if (s390_is_imm16 (ins->inst_imm)) {
3069                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3070                                 if (ins->dreg != ins->sreg1) {
3071                                         s390_lr   (code, ins->dreg, ins->sreg1);
3072                                 }
3073                                 s390_or   (code, ins->dreg, s390_r0);
3074                         } else {
3075                                 s390_basr (code, s390_r13, 0);
3076                                 s390_j    (code, 4);
3077                                 s390_word (code, ins->inst_imm);
3078                                 if (ins->dreg != ins->sreg1) {
3079                                         s390_lr   (code, ins->dreg, ins->sreg1);
3080                                 }
3081                                 s390_o    (code, ins->dreg, 0, s390_r13, 4);
3082                         }
3083                 }
3084                         break;
3085                 case CEE_XOR: {
3086                         if (ins->sreg1 == ins->dreg) {
3087                                 s390_xr   (code, ins->dreg, ins->sreg2);
3088                         }
3089                         else {
3090                                 if (ins->sreg2 == ins->dreg) {
3091                                         s390_xr  (code, ins->dreg, ins->sreg1);
3092                                 }
3093                                 else {
3094                                         s390_lr  (code, ins->dreg, ins->sreg1);
3095                                         s390_xr  (code, ins->dreg, ins->sreg2);
3096                                 }
3097                         }
3098                 }
3099                         break;
3100                 case OP_XOR_IMM: {
3101                         if (s390_is_imm16 (ins->inst_imm)) {
3102                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3103                                 if (ins->dreg != ins->sreg1) {
3104                                         s390_lr   (code, ins->dreg, ins->sreg1);
3105                                 }
3106                                 s390_xr   (code, ins->dreg, s390_r0);
3107                         } else {
3108                                 s390_basr (code, s390_r13, 0);
3109                                 s390_j    (code, 4);
3110                                 s390_word (code, ins->inst_imm);
3111                                 if (ins->dreg != ins->sreg1) {
3112                                         s390_lr   (code, ins->dreg, ins->sreg1);
3113                                 }
3114                                 s390_x    (code, ins->dreg, 0, s390_r13, 4);
3115                         }
3116                 }
3117                         break;
3118                 case CEE_SHL: {
3119                         CHECK_SRCDST_NCOM;
3120                         s390_sll  (code, ins->dreg, src2, 0);
3121                 }
3122                         break;
3123                 case OP_SHL_IMM: {
3124                         if (ins->sreg1 != ins->dreg) {
3125                                 s390_lr   (code, ins->dreg, ins->sreg1);
3126                         }
3127                         s390_sll  (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3128                 }
3129                         break;
3130                 case CEE_SHR: {
3131                         CHECK_SRCDST_NCOM;
3132                         s390_sra  (code, ins->dreg, src2, 0);
3133                 }
3134                         break;
3135                 case OP_SHR_IMM: {
3136                         if (ins->sreg1 != ins->dreg) {
3137                                 s390_lr   (code, ins->dreg, ins->sreg1);
3138                         }
3139                         s390_sra  (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3140                 }
3141                         break;
3142                 case OP_SHR_UN_IMM: {
3143                         if (ins->sreg1 != ins->dreg) {
3144                                 s390_lr   (code, ins->dreg, ins->sreg1);
3145                         }
3146                         s390_srl  (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3147                 }
3148                         break;
3149                 case CEE_SHR_UN: {
3150                         CHECK_SRCDST_NCOM;
3151                         s390_srl  (code, ins->dreg, src2, 0);
3152                 }
3153                         break;
3154                 case CEE_NOT: {
3155                         if (ins->sreg1 != ins->dreg) {
3156                                 s390_lr   (code, ins->dreg, ins->sreg1);
3157                         }
3158                         s390_lhi (code, s390_r0, -1);
3159                         s390_xr  (code, ins->dreg, s390_r0);
3160                 }
3161                         break;
3162                 case CEE_NEG: {
3163                         s390_lcr (code, ins->dreg, ins->sreg1);
3164                 }
3165                         break;
3166                 case CEE_MUL: {
3167                         if (ins->sreg1 == ins->dreg) {
3168                                 s390_msr  (code, ins->dreg, ins->sreg2);
3169                         }
3170                         else {
3171                                 if (ins->sreg2 == ins->dreg) {
3172                                         s390_msr (code, ins->dreg, ins->sreg1);
3173                                 }
3174                                 else {
3175                                         s390_lr  (code, ins->dreg, ins->sreg1);
3176                                         s390_msr (code, ins->dreg, ins->sreg2);
3177                                 }
3178                         }
3179                 }
3180                         break;
3181                 case OP_MUL_IMM: {
3182                         if (s390_is_imm16 (ins->inst_imm)) {
3183                                 s390_lhi  (code, s390_r13, ins->inst_imm);
3184                         } else {
3185                                 s390_basr (code, s390_r13, 0);
3186                                 s390_j    (code, 4);
3187                                 s390_word (code, ins->inst_imm);
3188 //                              if (ins->dreg != ins->sreg1) {
3189 //                                      s390_lr   (code, ins->dreg, ins->sreg1);
3190 //                              }
3191                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3192                         }
3193                         if (ins->dreg != ins->sreg1) {
3194                                 s390_lr   (code, ins->dreg, ins->sreg1);
3195                         }
3196                         s390_msr  (code, ins->dreg, s390_r13);
3197                 }
3198                         break;
3199                 case CEE_MUL_OVF: {
3200                         short int *o[2];
3201                         s390_ltr  (code, s390_r1, ins->sreg1);
3202                         s390_jz   (code, 0); CODEPTR(code, o[0]);
3203                         s390_ltr  (code, s390_r0, ins->sreg2);
3204                         s390_jnz  (code, 6);
3205                         s390_lhi  (code, s390_r1, 0);
3206                         s390_j    (code, 0); CODEPTR(code, o[1]);
3207                         s390_xr   (code, s390_r0, s390_r1);
3208                         s390_msr  (code, s390_r1, ins->sreg2);
3209                         s390_xr   (code, s390_r0, s390_r1);
3210                         s390_srl  (code, s390_r0, 0, 31);
3211                         s390_ltr  (code, s390_r0, s390_r0);
3212                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3213                         PTRSLOT   (code, o[0]);
3214                         PTRSLOT   (code, o[1]);
3215                         s390_lr   (code, ins->dreg, s390_r1);
3216                 }
3217                         break;
3218                 case CEE_MUL_OVF_UN: {
3219                         s390_lhi  (code, s390_r0, 0);
3220                         s390_lr   (code, s390_r1, ins->sreg1);
3221                         s390_mlr  (code, s390_r0, ins->sreg2);
3222                         s390_ltr  (code, s390_r0, s390_r0);
3223                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3224                         s390_lr   (code, ins->dreg, s390_r1);
3225                 }
3226                         break;
3227                 case OP_LMUL: {
3228                         s390_l    (code, s390_r0, 0, ins->sreg1, 4);
3229                         s390_srda (code, s390_r0, 0, 32);
3230                         s390_m    (code, s390_r0, 0, ins->sreg2, 4);
3231                         s390_l    (code, s390_r0, 0, ins->sreg1, 4);
3232                         s390_srl  (code, s390_r0, 0, 31);
3233                         s390_a    (code, s390_r0, 0, ins->sreg1, 0);
3234                         s390_l    (code, s390_r13, 0, ins->sreg2, 0);
3235                         s390_srl  (code, s390_r13, 0, 31);
3236                         s390_ms   (code, s390_r13, 0, ins->sreg1, 4);
3237                         s390_ar   (code, s390_r0, s390_r13);
3238                         s390_st   (code, s390_r0, 0, ins->dreg, 0);
3239                         s390_st   (code, s390_r1, 0, ins->dreg, 4);
3240                 }
3241                         break;
3242                 case OP_ICONST:
3243                 case OP_SETREGIMM: {
3244                         if (s390_is_imm16(ins->inst_c0)) {
3245                                 s390_lhi  (code, ins->dreg, ins->inst_c0);
3246                         } else {
3247                                 s390_basr (code, s390_r13, 0);
3248                                 s390_j    (code, 4);
3249                                 s390_word (code, ins->inst_c0);
3250                                 s390_l    (code, ins->dreg, 0, s390_r13, 4);
3251                         }
3252                 }
3253                         break;
3254                 case OP_AOTCONST: {
3255                         s390_basr (code, s390_r13, 0);
3256                         s390_j    (code, 4);
3257                         mono_add_patch_info (cfg, code - cfg->native_code,
3258                                 (MonoJumpInfoType)ins->inst_i1, ins->inst_p0);
3259                         s390_word (code, 0);
3260                         s390_l    (code,ins->dreg, 0, s390_r13, 4);
3261                 }
3262                         break;
3263                 case CEE_CONV_I4:
3264                 case CEE_CONV_U4:
3265                 case OP_MOVE:
3266                 case OP_SETREG: {
3267                         if (ins->dreg != ins->sreg1) {
3268                                 s390_lr (code, ins->dreg, ins->sreg1);
3269                         }
3270                 }
3271                         break;
3272                 case OP_SETLRET: {
3273                         int saved = ins->sreg1;
3274                         if (ins->sreg1 == s390_r2) {
3275                                 s390_lr (code, s390_r0, ins->sreg1);
3276                                 saved = s390_r0;
3277                         }
3278                         if (ins->sreg2 != s390_r2)
3279                                 s390_lr (code, s390_r2, ins->sreg2);
3280                         if (saved != s390_r3)
3281                                 s390_lr (code, s390_r3, saved);
3282                         break;
3283                 }
3284                 case OP_SETFREG:
3285                 case OP_FMOVE: {
3286                         if (ins->dreg != ins->sreg1) {
3287                                 s390_ldr   (code, ins->dreg, ins->sreg1);
3288                         }
3289                 }
3290                         break;
3291                 case OP_S390_SETF4RET: {
3292                         s390_ledbr (code, ins->dreg, ins->sreg1);
3293                 }
3294                         break;
3295                 case OP_TLS_GET: {
3296                         if (s390_is_imm16 (ins->inst_offset)) {
3297                                 s390_lhi (code, s390_r13, ins->inst_offset);
3298                         } else {
3299                                 s390_bras (code, s390_r13, 0);
3300                                 s390_j    (code, 4);
3301                                 s390_word (code, ins->inst_offset);
3302                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3303                         }
3304                         s390_ear (code, s390_r1, 0);
3305                         s390_l   (code, ins->dreg, s390_r13, s390_r1, 0);
3306                 }
3307                         break;
3308                 case OP_FCONV_TO_R4: {
3309                         NOT_IMPLEMENTED("OP_FCONV_TO_R4");
3310                         if ((ins->next) &&
3311                              (ins->next->opcode != OP_FMOVE) &&
3312                              (ins->next->opcode != OP_STORER4_MEMBASE_REG))
3313                                 s390_ledbr (code, ins->dreg, ins->sreg1);
3314                 }
3315                         break;
3316                 case CEE_JMP: {
3317                         if (cfg->method->save_lmf)
3318                                 restoreLMF(code, cfg->frame_reg, cfg->stack_usage);
3319
3320                         if (cfg->flags & MONO_CFG_HAS_TAIL) {
3321                                 code = emit_load_volatile_registers(code, cfg);
3322                         }
3323
3324                         code = backUpStackPtr(cfg, code, STK_BASE);
3325                         s390_l   (code, s390_r14, 0, STK_BASE, S390_RET_ADDR_OFFSET);
3326                         mono_add_patch_info (cfg, code - cfg->native_code,
3327                                              MONO_PATCH_INFO_METHOD_JUMP,
3328                                              ins->inst_p0);
3329                         s390_jcl (code, S390_CC_UN, 0);
3330                 }
3331                         break;
3332                 case OP_CHECK_THIS: {
3333                         /* ensure ins->sreg1 is not NULL */
3334                         s390_icm (code, s390_r0, 15, ins->sreg1, 0);
3335                 }
3336                         break;
3337                 case OP_ARGLIST: {
3338                         int offset = cfg->sig_cookie + cfg->stack_usage;
3339
3340                         if (s390_is_imm16 (offset))
3341                                 s390_lhi  (code, s390_r0, offset);
3342                         else {
3343                                 s390_basr (code, s390_r13, 0);
3344                                 s390_j    (code, 4);
3345                                 s390_word (code, offset);
3346                                 s390_l    (code, s390_r0, 0, s390_r13, 0);
3347                         }
3348                         s390_ar   (code, s390_r0, cfg->frame_reg);
3349                         s390_st   (code, s390_r0, 0, ins->sreg1, 0);
3350                 }
3351                         break;
3352                 case OP_FCALL: {
3353                         call = (MonoCallInst*)ins;
3354                         if (ins->flags & MONO_INST_HAS_METHOD)
3355                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_METHOD,
3356                                                      call->method);
3357                         else
3358                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS,
3359                                                      call->fptr);
3360                         s390_brasl (code, s390_r14, 0);
3361                         if (call->signature->ret->type == MONO_TYPE_R4)
3362                                 s390_ldebr (code, s390_f0, s390_f0);
3363                 }
3364                         break;
3365                 case OP_LCALL:
3366                 case OP_VCALL:
3367                 case OP_VOIDCALL:
3368                 case CEE_CALL: {
3369                         call = (MonoCallInst*)ins;
3370                         if (ins->flags & MONO_INST_HAS_METHOD)
3371                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_METHOD, call->method);
3372                         else
3373                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS, call->fptr);
3374                         s390_brasl (code, s390_r14, 0);
3375                 }
3376                         break;
3377                 case OP_FCALL_REG: {
3378                         call = (MonoCallInst*)ins;
3379                         s390_lr   (code, s390_r1, ins->sreg1);
3380                         s390_basr (code, s390_r14, s390_r1);
3381                         if (call->signature->ret->type == MONO_TYPE_R4)
3382                                 s390_ldebr (code, s390_f0, s390_f0);
3383                 }
3384                         break;
3385                 case OP_LCALL_REG:
3386                 case OP_VCALL_REG:
3387                 case OP_VOIDCALL_REG:
3388                 case OP_CALL_REG: {
3389                         s390_lr   (code, s390_r1, ins->sreg1);
3390                         s390_basr (code, s390_r14, s390_r1);
3391                 }
3392                         break;
3393                 case OP_FCALL_MEMBASE: {
3394                         call = (MonoCallInst*)ins;
3395                         s390_l    (code, s390_r1, 0, ins->sreg1, ins->inst_offset);
3396                         s390_basr (code, s390_r14, s390_r1);
3397                         if (call->signature->ret->type == MONO_TYPE_R4)
3398                                 s390_ldebr (code, s390_f0, s390_f0);
3399                 }
3400                         break;
3401                 case OP_LCALL_MEMBASE:
3402                 case OP_VCALL_MEMBASE:
3403                 case OP_VOIDCALL_MEMBASE:
3404                 case OP_CALL_MEMBASE: {
3405                         s390_l    (code, s390_r1, 0, ins->sreg1, ins->inst_offset);
3406                         s390_basr (code, s390_r14, s390_r1);
3407                 }
3408                         break;
3409                 case OP_OUTARG:
3410                         g_assert_not_reached ();
3411                         break;
3412                 case OP_LOCALLOC: {
3413                         /*------------------------------------------*/
3414                         /* To allocate space on the stack we have   */
3415                         /* to allow room for parameters passed in   */
3416                         /* calls, the backchain pointer and round   */
3417                         /* it to our stack alignment requirements   */
3418                         /*------------------------------------------*/
3419                         int alloca_skip = S390_MINIMAL_STACK_SIZE + cfg->param_area;
3420                         int area_offset = S390_ALIGN(alloca_skip, S390_STACK_ALIGNMENT);
3421                         s390_lr   (code, s390_r1, ins->sreg1);
3422                         if (ins->flags & MONO_INST_INIT)
3423                                 s390_lr   (code, s390_r0, ins->sreg1);
3424                         s390_ahi  (code, s390_r1, 14);
3425                         s390_srl  (code, s390_r1, 0, 3);
3426                         s390_sll  (code, s390_r1, 0, 3);
3427                         if (cfg->method->save_lmf) {
3428                                 /*----------------------------------*/
3429                                 /* we have to adjust lmf ebp value  */
3430                                 /*----------------------------------*/
3431                                 int lmfOffset = cfg->stack_usage - sizeof(MonoLMF);
3432
3433                                 s390_lr (code, s390_r13, cfg->frame_reg);
3434                                 if (s390_is_uimm16(lmfOffset))
3435                                         s390_ahi   (code, s390_r13, lmfOffset);
3436                                 else {
3437                                         s390_basr (code, s390_r14, 0);
3438                                         s390_j    (code, 4);
3439                                         s390_word (code, lmfOffset);
3440                                         s390_a    (code, s390_r13, 0, s390_r14, 4);
3441                                 }
3442                                 s390_lr (code, s390_r14, STK_BASE);
3443                                 s390_sr (code, s390_r14, s390_r1);
3444                                 s390_st (code, s390_r14, 0, s390_r13,
3445                                          G_STRUCT_OFFSET(MonoLMF, ebp));
3446                         }
3447                         s390_l    (code, s390_r13, 0, STK_BASE, 0);
3448                         s390_sr   (code, STK_BASE, s390_r1);
3449                         s390_st   (code, s390_r13, 0, STK_BASE, 0);
3450                         s390_la   (code, ins->dreg, 0, STK_BASE, area_offset);
3451                         s390_srl  (code, ins->dreg, 0, 3);
3452                         s390_sll  (code, ins->dreg, 0, 3);
3453                         if (ins->flags & MONO_INST_INIT) {
3454                                 s390_lr   (code, s390_r1, s390_r0);
3455                                 s390_lr   (code, s390_r0, ins->dreg);
3456                                 s390_lr   (code, s390_r14, s390_r12);
3457                                 s390_lhi  (code, s390_r13, 0);
3458                                 s390_mvcle(code, s390_r0, s390_r12, 0, 0);
3459                                 s390_jo   (code, -2);
3460                                 s390_lr   (code, s390_r12, s390_r14);
3461                         }
3462                 }
3463                         break;
3464                 case CEE_RET: {
3465                         s390_br  (code, s390_r14);
3466                 }
3467                         break;
3468                 case CEE_THROW: {
3469                         s390_lr (code, s390_r2, ins->sreg1);
3470                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD,
3471                                              (gpointer)"mono_arch_throw_exception");
3472                         s390_brasl (code, s390_r14, 0);
3473                 }
3474                         break;
3475                 case OP_RETHROW: {
3476                         s390_lr (code, s390_r2, ins->sreg1);
3477                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD,
3478                                              (gpointer)"mono_arch_rethrow_exception");
3479                         s390_brasl (code, s390_r14, 0);
3480                 }
3481                         break;
3482                 case OP_START_HANDLER: {
3483                         if (s390_is_uimm12 (ins->inst_left->inst_offset)) {
3484                                 s390_st   (code, s390_r14, 0,
3485                                            ins->inst_left->inst_basereg,
3486                                            ins->inst_left->inst_offset);
3487                         } else {
3488                                 s390_basr (code, s390_r13, 0);
3489                                 s390_j    (code, 4);
3490                                 s390_word (code, ins->inst_left->inst_offset);
3491                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3492                                 s390_st   (code, s390_r14, s390_r13,
3493                                            ins->inst_left->inst_basereg, 0);
3494                         }
3495                 }
3496                         break;
3497                 case OP_ENDFILTER: {
3498                         if (ins->sreg1 != s390_r2)
3499                                 s390_lr (code, s390_r2, ins->sreg1);
3500                         if (s390_is_uimm12 (ins->inst_left->inst_offset)) {
3501                                 s390_l  (code, s390_r14, 0, ins->inst_left->inst_basereg,
3502                                          ins->inst_left->inst_offset);
3503                         } else {
3504                                 s390_basr (code, s390_r13, 0);
3505                                 s390_j    (code, 4);
3506                                 s390_word (code, ins->inst_left->inst_offset);
3507                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3508                                 s390_l    (code, s390_r14, s390_r13,
3509                                            ins->inst_left->inst_basereg, 0);
3510                         }
3511                         s390_br  (code, s390_r14);
3512                 }
3513                         break;
3514                 case CEE_ENDFINALLY: {
3515                         if (s390_is_uimm12 (ins->inst_left->inst_offset)) {
3516                                 s390_l  (code, s390_r14, 0, ins->inst_left->inst_basereg,
3517                                          ins->inst_left->inst_offset);
3518                         } else {
3519                                 s390_basr (code, s390_r13, 0);
3520                                 s390_j    (code, 4);
3521                                 s390_word (code, ins->inst_left->inst_offset);
3522                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3523                                 s390_l    (code, s390_r14, s390_r13,
3524                                            ins->inst_left->inst_basereg, 0);
3525                         }
3526                         s390_br  (code, s390_r14);
3527                 }
3528                         break;
3529                 case OP_CALL_HANDLER: {
3530                         mono_add_patch_info (cfg, code-cfg->native_code,
3531                                              MONO_PATCH_INFO_BB, ins->inst_target_bb);
3532                         s390_brasl (code, s390_r14, 0);
3533                 }
3534                         break;
3535                 case OP_LABEL: {
3536                         ins->inst_c0 = code - cfg->native_code;
3537                 }
3538                         break;
3539                 case CEE_BR:
3540                         EMIT_UNCOND_BRANCH(ins);
3541                         break;
3542                 case OP_BR_REG: {
3543                         s390_br  (code, ins->sreg1);
3544                 }
3545                         break;
3546                 case OP_CEQ: {
3547                         s390_lhi (code, ins->dreg, 1);
3548                         s390_jz  (code, 4);
3549                         s390_lhi (code, ins->dreg, 0);
3550                 }
3551                         break;
3552                 case OP_CLT: {
3553                         s390_lhi (code, ins->dreg, 1);
3554                         s390_jl  (code, 4);
3555                         s390_lhi (code, ins->dreg, 0);
3556                 }
3557                         break;
3558                 case OP_CLT_UN: {
3559                         s390_lhi (code, ins->dreg, 1);
3560                         s390_jlo (code, 4);
3561                         s390_lhi (code, ins->dreg, 0);
3562                 }
3563                         break;
3564                 case OP_CGT: {
3565                         s390_lhi (code, ins->dreg, 1);
3566                         s390_jh  (code, 4);
3567                         s390_lhi (code, ins->dreg, 0);
3568                 }
3569                         break;
3570                 case OP_CGT_UN: {
3571                         s390_lhi (code, ins->dreg, 1);
3572                         s390_jho (code, 4);
3573                         s390_lhi (code, ins->dreg, 0);
3574                 }
3575                         break;
3576                 case OP_COND_EXC_EQ:
3577                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_EQ, ins->inst_p1);
3578                         break;
3579                 case OP_COND_EXC_NE_UN:
3580                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NE, ins->inst_p1);
3581                         break;
3582                 case OP_COND_EXC_LT:
3583                 case OP_COND_EXC_LT_UN:
3584                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, ins->inst_p1);
3585                         break;
3586                 case OP_COND_EXC_GT:
3587                 case OP_COND_EXC_GT_UN:
3588                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GT, ins->inst_p1);
3589                         break;
3590                 case OP_COND_EXC_GE:
3591                 case OP_COND_EXC_GE_UN:
3592                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GE, ins->inst_p1);
3593                         break;
3594                 case OP_COND_EXC_LE:
3595                 case OP_COND_EXC_LE_UN:
3596                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LE, ins->inst_p1);
3597                         break;
3598                 case OP_COND_EXC_OV:
3599                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, ins->inst_p1);
3600                         break;
3601                 case OP_COND_EXC_NO:
3602                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NO, ins->inst_p1);
3603                         break;
3604                 case OP_COND_EXC_C:
3605                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, ins->inst_p1);
3606                         break;
3607                 case OP_COND_EXC_NC:
3608                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, ins->inst_p1);
3609                         break;
3610                 case CEE_BEQ:
3611                         EMIT_COND_BRANCH (ins, S390_CC_EQ);
3612                         break;
3613                 case CEE_BNE_UN:
3614                         EMIT_COND_BRANCH (ins, S390_CC_NE);
3615                         break;
3616                 case CEE_BLT:
3617                 case CEE_BLT_UN:
3618                         EMIT_COND_BRANCH (ins, S390_CC_LT);
3619                         break;
3620                 case CEE_BGT:
3621                 case CEE_BGT_UN:
3622                         EMIT_COND_BRANCH (ins, S390_CC_GT);
3623                         break;
3624                 case CEE_BGE:
3625                 case CEE_BGE_UN:
3626                         EMIT_COND_BRANCH (ins, S390_CC_GE);
3627                         break;
3628                 case CEE_BLE:
3629                 case CEE_BLE_UN:
3630                         EMIT_COND_BRANCH (ins, S390_CC_LE);
3631                         break;
3632
3633                 /* floating point opcodes */
3634                 case OP_R8CONST: {
3635                         if (*((float *) ins->inst_p0) == 0) {
3636                                 s390_lzdr (code, ins->dreg);
3637                         } else {
3638                                 s390_basr  (code, s390_r13, 0);
3639                                 s390_j     (code, 4);
3640                                 s390_word  (code, ins->inst_p0);
3641                                 s390_l     (code, s390_r13, 0, s390_r13, 4);
3642                                 s390_ld    (code, ins->dreg, 0, s390_r13, 0);
3643                         }
3644                 }
3645                         break;
3646                 case OP_R4CONST: {
3647                         if (*((float *) ins->inst_p0) == 0) {
3648                                 s390_lzdr (code, ins->dreg);
3649                         } else {
3650                                 s390_basr (code, s390_r13, 0);
3651                                 s390_j    (code, 4);
3652                                 s390_word (code, ins->inst_p0);
3653                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3654                                 s390_ldeb (code, ins->dreg, 0, s390_r13, 0);
3655                         }
3656                 }
3657                         break;
3658                 case OP_STORER8_MEMBASE_REG: {
3659                         if (s390_is_uimm12(ins->inst_offset)) {
3660                                 s390_std  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
3661                         } else {
3662                                 s390_basr (code, s390_r13, 0);
3663                                 s390_j    (code, 4);
3664                                 s390_word (code, ins->inst_offset);
3665                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3666                                 s390_std  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
3667                         }
3668                 }
3669                         break;
3670                 case OP_LOADR8_MEMBASE: {
3671                         if (s390_is_uimm12(ins->inst_offset)) {
3672                                 s390_ld   (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
3673                         } else {
3674                                 s390_basr (code, s390_r13, 0);
3675                                 s390_j    (code, 4);
3676                                 s390_word (code, ins->inst_offset);
3677                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3678                                 s390_ld   (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
3679                         }
3680                 }
3681                         break;
3682                 case OP_STORER4_MEMBASE_REG: {
3683                         if (s390_is_uimm12(ins->inst_offset)) {
3684                                 s390_ledbr(code, s390_f15, ins->sreg1);
3685                                 s390_ste  (code, s390_f15, 0, ins->inst_destbasereg, ins->inst_offset);
3686                         } else {
3687                                 s390_basr (code, s390_r13, 0);
3688                                 s390_j    (code, 4);
3689                                 s390_word (code, ins->inst_offset);
3690                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3691                                 s390_ledbr(code, s390_f15, ins->sreg1);
3692                                 s390_ste  (code, s390_f15, s390_r13, ins->inst_destbasereg, 0);
3693                         }
3694                 }
3695                         break;
3696                 case OP_LOADR4_MEMBASE: {
3697                         if (s390_is_uimm12(ins->inst_offset)) {
3698                                 s390_ldeb (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
3699                         } else {
3700                                 s390_basr (code, s390_r13, 0);
3701                                 s390_j    (code, 4);
3702                                 s390_word (code, ins->inst_offset);
3703                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3704                                 s390_ldeb (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
3705                         }
3706                 }
3707                         break;
3708                 case CEE_CONV_R_UN: {
3709                         s390_cdfbr (code, ins->dreg, ins->sreg1);
3710                         s390_ltr   (code, ins->sreg1, ins->sreg1);
3711                         s390_jnl   (code, 12);
3712                         s390_basr  (code, s390_r13, 0);
3713                         s390_j     (code, 6);
3714                         s390_word  (code, 0x41f00000);
3715                         s390_word  (code, 0);
3716                         s390_adb   (code, ins->dreg, 0, s390_r13, 4);
3717                 }
3718                         break;
3719                 case CEE_CONV_R4: {
3720                         s390_cdfbr (code, ins->dreg, ins->sreg1);
3721                 }
3722                         break;
3723                 case CEE_CONV_R8: {
3724                         s390_cdfbr (code, ins->dreg, ins->sreg1);
3725                 }
3726                         break;
3727                 case OP_FCONV_TO_I1:
3728                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 1, TRUE);
3729                         break;
3730                 case OP_FCONV_TO_U1:
3731                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 1, FALSE);
3732                         break;
3733                 case OP_FCONV_TO_I2:
3734                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 2, TRUE);
3735                         break;
3736                 case OP_FCONV_TO_U2:
3737                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 2, FALSE);
3738                         break;
3739                 case OP_FCONV_TO_I4:
3740                 case OP_FCONV_TO_I:
3741                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 4, TRUE);
3742                         break;
3743                 case OP_FCONV_TO_U4:
3744                 case OP_FCONV_TO_U:
3745                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 4, FALSE);
3746                         break;
3747                 case OP_FCONV_TO_I8:
3748                 case OP_FCONV_TO_U8:
3749                         g_assert_not_reached ();
3750                         /* Implemented as helper calls */
3751                         break;
3752                 case OP_LCONV_TO_R_UN:
3753                         g_assert_not_reached ();
3754                         /* Implemented as helper calls */
3755                         break;
3756                 case OP_LCONV_TO_OVF_I: {
3757                         /* Valid ints: 0xffffffff:8000000 to 00000000:0x7f000000 */
3758                         short int *o[5];
3759                         s390_ltr  (code, ins->sreg1, ins->sreg1);
3760                         s390_jnl  (code, 0); CODEPTR(code, o[0]);
3761                         s390_ltr  (code, ins->sreg2, ins->sreg2);
3762                         s390_jnl  (code, 0); CODEPTR(code, o[1]);
3763                         s390_lhi  (code, s390_r13, -1);
3764                         s390_cr   (code, ins->sreg2, s390_r13);
3765                         s390_jnz  (code, 0); CODEPTR(code, o[2]);
3766                         if (ins->dreg != ins->sreg1)
3767                                 s390_lr   (code, ins->dreg, ins->sreg1);
3768                         s390_j    (code, 0); CODEPTR(code, o[3]);
3769                         PTRSLOT(code, o[0]);
3770                         s390_ltr  (code, ins->sreg2, ins->sreg2);
3771                         s390_jz   (code, 0); CODEPTR(code, o[4]);
3772                         PTRSLOT(code, o[1]);
3773                         PTRSLOT(code, o[2]);
3774                         mono_add_patch_info (cfg, code - cfg->native_code,
3775                                              MONO_PATCH_INFO_EXC, "OverflowException");
3776                         s390_brasl (code, s390_r14, 0);
3777                         PTRSLOT(code, o[3]);
3778                         PTRSLOT(code, o[4]);
3779                 }
3780                         break;
3781                 case OP_SQRT: {
3782                         s390_sqdbr (code, ins->dreg, ins->sreg1);
3783                 }
3784                         break;
3785                 case OP_FADD: {
3786                         CHECK_SRCDST_COM_F;
3787                         s390_adbr (code, ins->dreg, src2);
3788                 }
3789                         break;
3790                 case OP_FSUB: {
3791                         CHECK_SRCDST_NCOM_F;
3792                         s390_sdbr (code, ins->dreg, src2);
3793                 }
3794                         break;
3795                 case OP_FMUL: {
3796                         CHECK_SRCDST_COM_F;
3797                         s390_mdbr (code, ins->dreg, src2);
3798                 }
3799                         break;
3800                 case OP_FDIV: {
3801                         CHECK_SRCDST_NCOM_F;
3802                         s390_ddbr (code, ins->dreg, src2);
3803                 }
3804                         break;
3805                 case OP_FNEG: {
3806                         s390_lcdbr (code, ins->dreg, ins->sreg1);
3807                 }
3808                         break;
3809                 case OP_FREM: {
3810                         CHECK_SRCDST_NCOM_F;
3811                         s390_didbr (code, ins->dreg, src2, 5, s390_f15);
3812                 }
3813                         break;
3814                 case OP_FCOMPARE: {
3815                         s390_cdbr (code, ins->sreg1, ins->sreg2);
3816                 }
3817                         break;
3818                 case OP_FCEQ: {
3819                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3820                         s390_lhi   (code, ins->dreg, 1);
3821                         s390_je    (code, 4);
3822                         s390_lhi   (code, ins->dreg, 0);
3823                 }
3824                         break;
3825                 case OP_FCLT: {
3826                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3827                         s390_lhi   (code, ins->dreg, 1);
3828                         s390_jl    (code, 4);
3829                         s390_lhi   (code, ins->dreg, 0);
3830                 }
3831                         break;
3832                 case OP_FCLT_UN: {
3833                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3834                         s390_lhi   (code, ins->dreg, 1);
3835                         s390_jlo   (code, 4);
3836                         s390_lhi   (code, ins->dreg, 0);
3837                 }
3838                         break;
3839                 case OP_FCGT: {
3840                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3841                         s390_lhi   (code, ins->dreg, 1);
3842                         s390_jh    (code, 4);
3843                         s390_lhi   (code, ins->dreg, 0);
3844                 }
3845                         break;
3846                 case OP_FCGT_UN: {
3847                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3848                         s390_lhi   (code, ins->dreg, 1);
3849                         s390_jho   (code, 4);
3850                         s390_lhi   (code, ins->dreg, 0);
3851                 }
3852                         break;
3853                 case OP_FBEQ:
3854                         EMIT_COND_BRANCH (ins, S390_CC_EQ|S390_CC_OV);
3855                         break;
3856                 case OP_FBNE_UN:
3857                         EMIT_COND_BRANCH (ins, S390_CC_NE|S390_CC_OV);
3858                         break;
3859                 case OP_FBLT:
3860                         EMIT_COND_BRANCH (ins, S390_CC_LT);
3861                         break;
3862                 case OP_FBLT_UN:
3863                         EMIT_COND_BRANCH (ins, S390_CC_LT|S390_CC_OV);
3864                         break;
3865                 case OP_FBGT:
3866                         EMIT_COND_BRANCH (ins, S390_CC_GT);
3867                         break;
3868                 case OP_FBGT_UN:
3869                         EMIT_COND_BRANCH (ins, S390_CC_GT|S390_CC_OV);
3870                         break;
3871                 case OP_FBGE:
3872                         EMIT_COND_BRANCH (ins, S390_CC_GE);
3873                         break;
3874                 case OP_FBGE_UN:
3875                         EMIT_COND_BRANCH (ins, S390_CC_GE|S390_CC_OV);
3876                         break;
3877                 case OP_FBLE:
3878                         EMIT_COND_BRANCH (ins, S390_CC_LE);
3879                         break;
3880                 case OP_FBLE_UN:
3881                         EMIT_COND_BRANCH (ins, S390_CC_LE|S390_CC_OV);
3882                         break;
3883                 case CEE_CKFINITE: {
3884                         short *o;
3885                         s390_lhi  (code, s390_r13, 0x7f);
3886                         s390_tcdb (code, ins->sreg1, 0, s390_r13, 0);
3887                         s390_jz   (code, 0); CODEPTR(code, o);
3888                         mono_add_patch_info (cfg, code - cfg->native_code,
3889                                              MONO_PATCH_INFO_EXC, "ArithmeticException");
3890                         s390_brasl (code, s390_r14,0);
3891                         PTRSLOT(code, o);
3892                 }
3893                         break;
3894                 case OP_S390_MOVE: {
3895                         if (ins->unused > 0) {
3896                                 if (ins->unused <= 256) {
3897                                         s390_mvc  (code, ins->unused, ins->dreg,
3898                                                    ins->inst_offset, ins->sreg1, ins->inst_imm);
3899                                 } else {
3900                                         s390_lr   (code, s390_r0, ins->dreg);
3901                                         if (s390_is_imm16 (ins->inst_offset)) {
3902                                                 s390_ahi  (code, s390_r0, ins->inst_offset);
3903                                         } else {
3904                                                 s390_basr (code, s390_r13, 0);
3905                                                 s390_j    (code, 4);
3906                                                 s390_word (code, ins->inst_offset);
3907                                                 s390_a    (code, s390_r0, 0, s390_r13, 4);
3908                                         }
3909                                         s390_lr   (code, s390_r14, s390_r12);
3910                                         s390_lr   (code, s390_r12, ins->sreg1);
3911                                         if (s390_is_imm16 (ins->inst_imm)) {
3912                                                 s390_ahi  (code, s390_r12, ins->inst_imm);
3913                                         } else {
3914                                                 s390_basr (code, s390_r13, 0);
3915                                                 s390_j    (code, 4);
3916                                                 s390_word (code, ins->inst_imm);
3917                                                 s390_a    (code, s390_r12, 0, s390_r13, 4);
3918                                         }
3919                                         s390_lr   (code, s390_r1, ins->sreg1);
3920                                         s390_lr   (code, s390_r13, s390_r1);
3921                                         s390_mvcle(code, s390_r0, s390_r12, 0, 0);
3922                                         s390_jo   (code, -2);
3923                                         s390_lr   (code, s390_r12, s390_r14);
3924                                 }
3925                         }
3926                 }
3927                         break;
3928                 case OP_ATOMIC_ADD_I4: {
3929                         s390_lr  (code, s390_r1, ins->sreg2);
3930                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
3931                         s390_a   (code, s390_r1, 0, ins->inst_basereg, ins->inst_offset);
3932                         s390_cs  (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
3933                         s390_jnz (code, -7);
3934                         s390_lr  (code, ins->dreg, s390_r1);
3935                 }
3936                         break;
3937                 case OP_ATOMIC_ADD_NEW_I4: {
3938                         s390_lr  (code, s390_r1, ins->sreg2);
3939                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
3940                         s390_a   (code, s390_r1, 0, ins->inst_basereg, ins->inst_offset);
3941                         s390_cs  (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
3942                         s390_jnz (code, -7);
3943                         s390_lr  (code, ins->dreg, s390_r1);
3944                 }
3945                         break;
3946                 case OP_ATOMIC_EXCHANGE_I4: {
3947                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
3948                         s390_cs  (code, s390_r0, ins->sreg2, ins->inst_basereg, ins->inst_offset);
3949                         s390_jnz (code, -4);
3950                         s390_lr  (code, ins->dreg, s390_r0);
3951                 }
3952                         break;
3953                 case OP_S390_BKCHAIN: {
3954                         s390_lr  (code, ins->dreg, ins->sreg1);
3955                         if (s390_is_imm16 (cfg->stack_offset)) {
3956                                 s390_ahi (code, ins->dreg, cfg->stack_offset);
3957                         } else {
3958                                 s390_basr (code, s390_r13, 0);
3959                                 s390_j    (code, 6);
3960                                 s390_word (code, cfg->stack_offset);
3961                                 s390_a    (code, ins->dreg, 0, s390_r13, 4);
3962                         }
3963                 }
3964                 case OP_MEMORY_BARRIER: {
3965                 }
3966                         break;
3967                 default:
3968                         g_warning ("unknown opcode %s in %s()\n", mono_inst_name (ins->opcode), __FUNCTION__);
3969                         g_assert_not_reached ();
3970                 }
3971
3972                 if ((cfg->opt & MONO_OPT_BRANCH) && ((code - cfg->native_code - offset) > max_len)) {
3973                         g_warning ("wrong maximal instruction length of instruction %s (expected %d, got %d)",
3974                                    mono_inst_name (ins->opcode), max_len, code - cfg->native_code - offset);
3975                         g_assert_not_reached ();
3976                 }
3977
3978                 cpos += max_len;
3979
3980                 last_ins = ins;
3981                 last_offset = offset;
3982
3983                 ins = ins->next;
3984         }
3985
3986         cfg->code_len = code - cfg->native_code;
3987 }
3988
3989 /*========================= End of Function ========================*/
3990
3991 /*------------------------------------------------------------------*/
3992 /*                                                                  */
3993 /* Name         - mono_arch_register_lowlevel_calls                 */
3994 /*                                                                  */
3995 /* Function     - Register routines to help with --trace operation. */
3996 /*                                                                  */
3997 /*------------------------------------------------------------------*/
3998
3999 void
4000 mono_arch_register_lowlevel_calls (void)
4001 {
4002         mono_register_jit_icall (mono_arch_break, "mono_arch_break", NULL, TRUE);
4003         mono_register_jit_icall (mono_arch_get_lmf_addr, "mono_arch_get_lmf_addr", NULL, TRUE);
4004 }
4005
4006 /*========================= End of Function ========================*/
4007
4008 /*------------------------------------------------------------------*/
4009 /*                                                                  */
4010 /* Name         - mono_arch_patch_code                              */
4011 /*                                                                  */
4012 /* Function     - Process the patch data created during the         */
4013 /*                instruction build process. This resolves jumps,   */
4014 /*                calls, variables etc.                             */
4015 /*                                                                  */
4016 /*------------------------------------------------------------------*/
4017
4018 static void
4019 mono_arch_break(void) {
4020 }
4021
4022 /*========================= End of Function ========================*/
4023
4024 /*------------------------------------------------------------------*/
4025 /*                                                                  */
4026 /* Name         - mono_arch_patch_code                              */
4027 /*                                                                  */
4028 /* Function     - Process the patch data created during the         */
4029 /*                instruction build process. This resolves jumps,   */
4030 /*                calls, variables etc.                             */
4031 /*                                                                  */
4032 /*------------------------------------------------------------------*/
4033
4034 void
4035 mono_arch_patch_code (MonoMethod *method, MonoDomain *domain,
4036                       guint8 *code, MonoJumpInfo *ji, gboolean run_cctors)
4037 {
4038         MonoJumpInfo *patch_info;
4039
4040         for (patch_info = ji; patch_info; patch_info = patch_info->next) {
4041                 unsigned char *ip = patch_info->ip.i + code;
4042                 gconstpointer target = NULL;
4043
4044                 target = mono_resolve_patch_target (method, domain, code,
4045                                                     patch_info, run_cctors);
4046
4047                 switch (patch_info->type) {
4048                         case MONO_PATCH_INFO_IP:
4049                         case MONO_PATCH_INFO_EXC_NAME:
4050                         case MONO_PATCH_INFO_LDSTR:
4051                         case MONO_PATCH_INFO_TYPE_FROM_HANDLE:
4052                         case MONO_PATCH_INFO_LDTOKEN:
4053                         case MONO_PATCH_INFO_EXC:
4054                                 continue;
4055                         case MONO_PATCH_INFO_SWITCH:
4056                                 /*----------------------------------*/
4057                                 /* ip points at the basr r13,0/j +4 */
4058                                 /* instruction the vtable value     */
4059                                 /* follows this (i.e. ip+6)         */
4060                                 /*----------------------------------*/
4061                                 *((gconstpointer *)(ip+6)) = target;
4062                                 target = NULL;
4063                                 continue;
4064                         case MONO_PATCH_INFO_METHODCONST:
4065                         case MONO_PATCH_INFO_CLASS:
4066                         case MONO_PATCH_INFO_IMAGE:
4067                         case MONO_PATCH_INFO_FIELD:
4068                         case MONO_PATCH_INFO_IID:
4069                                 target = S390_RELATIVE(target, ip);
4070                                 continue;
4071                         case MONO_PATCH_INFO_R4:
4072                         case MONO_PATCH_INFO_R8:
4073                         case MONO_PATCH_INFO_METHOD_REL:
4074                                 g_assert_not_reached ();
4075                                 continue;
4076                         default:
4077                                 target = S390_RELATIVE(target, ip);
4078                                 ip += 2;
4079                 }
4080                 s390_patch (ip, (guint32) target);
4081         }
4082 }
4083
4084 /*========================= End of Function ========================*/
4085
4086 /*------------------------------------------------------------------*/
4087 /*                                                                  */
4088 /* Name         - emit_load_volatile_registers                      */
4089 /*                                                                  */
4090 /* Function     - Create the instruction sequence for loading the   */
4091 /*                parameter registers for use with the 'tail' op.   */
4092 /*                                                                  */
4093 /*                The register loading operations performed here    */
4094 /*                are the mirror of the store operations performed  */
4095 /*                in mono_arch_emit_prolog and need to be kept in   */
4096 /*                synchronization with it.                          */
4097 /*                                                                  */
4098 /*------------------------------------------------------------------*/
4099
4100 guint8 *
4101 emit_load_volatile_registers(guint8 * code, MonoCompile *cfg)
4102 {
4103         MonoMethod *method = cfg->method;
4104         MonoMethodSignature *sig;
4105         MonoInst *inst;
4106         int pos, i;
4107         CallInfo *cinfo;
4108         size_data sz;
4109
4110         sig = mono_method_signature (method);
4111         pos = 0;
4112
4113         cinfo = calculate_sizes (sig, &sz, sig->pinvoke);
4114
4115         if (cinfo->struct_ret) {
4116                 ArgInfo *ainfo = &cinfo->ret;
4117                 inst         = cfg->ret;
4118                 s390_l (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4119         }
4120
4121         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
4122                 ArgInfo *ainfo = cinfo->args + i;
4123                 inst = cfg->varinfo [pos];
4124
4125                 if (inst->opcode == OP_REGVAR) {
4126                         if (ainfo->regtype == RegTypeGeneral)
4127                                 s390_lr (code, ainfo->reg, inst->dreg);
4128                         else if (ainfo->regtype == RegTypeFP) {
4129                                 if (inst->dreg != ainfo->reg) {
4130                                         if (ainfo->size == 4) {
4131                                                 s390_ldebr (code, ainfo->reg, inst->dreg);
4132                                         } else {
4133                                                 s390_ldr   (code, ainfo->reg, inst->dreg);
4134                                         }
4135                                 }
4136                         }
4137                         else if (ainfo->regtype == RegTypeBase) {
4138                         } else
4139                                 g_assert_not_reached ();
4140                 } else {
4141                         if (ainfo->regtype == RegTypeGeneral) {
4142                                 if (!((ainfo->reg >= 2) && (ainfo->reg <= 6)))
4143                                         g_assert_not_reached();
4144                                 switch (ainfo->size) {
4145                                 case 1:
4146                                         s390_ic (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4147                                         break;
4148                                 case 2:
4149                                         s390_lh (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4150                                         break;
4151                                 case 8:
4152                                         s390_lm (code, ainfo->reg, ainfo->reg + 1,
4153                                                   inst->inst_basereg, inst->inst_offset);
4154                                         break;
4155                                 default:
4156                                         s390_l  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4157                                 }
4158                         } else if (ainfo->regtype == RegTypeBase) {
4159                         } else if (ainfo->regtype == RegTypeFP) {
4160                                 if (ainfo->size == 8)
4161                                         s390_ld (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4162                                 else if (ainfo->size == 4)
4163                                         s390_le (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4164                                 else
4165                                         g_assert_not_reached ();
4166                         } else if (ainfo->regtype == RegTypeStructByVal) {
4167                                 if (ainfo->reg != STK_BASE) {
4168                                         switch (ainfo->size) {
4169                                         case 1:
4170                                                 s390_ic (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4171                                                 break;
4172                                         case 2:
4173                                                 s390_lh (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4174                                                 break;
4175                                         case 4:
4176                                                 s390_l  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4177                                                 break;
4178                                         case 8:
4179                                                 s390_lm (code, ainfo->reg, ainfo->reg+1, inst->inst_basereg, inst->inst_offset);
4180                                                 break;
4181                                         }
4182                                 }
4183                         } else if (ainfo->regtype == RegTypeStructByAddr) {
4184                                 if (ainfo->reg != STK_BASE) {
4185                                         s390_l  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4186                                 }
4187                         } else
4188                                 g_assert_not_reached ();
4189                 }
4190                 pos++;
4191         }
4192
4193         g_free (cinfo);
4194
4195         return code;
4196 }
4197
4198 /*========================= End of Function ========================*/
4199
4200 /*------------------------------------------------------------------*/
4201 /*                                                                  */
4202 /* Name         - mono_arch_emit_prolog                             */
4203 /*                                                                  */
4204 /* Function     - Create the instruction sequence for a function    */
4205 /*                prolog.                                           */
4206 /*                                                                  */
4207 /*------------------------------------------------------------------*/
4208
4209 guint8 *
4210 mono_arch_emit_prolog (MonoCompile *cfg)
4211 {
4212         MonoMethod *method = cfg->method;
4213         MonoBasicBlock *bb;
4214         MonoMethodSignature *sig;
4215         MonoInst *inst;
4216         int alloc_size, pos, max_offset, i;
4217         guint8 *code;
4218         CallInfo *cinfo;
4219         size_data sz;
4220         int tracing = 0;
4221         int lmfOffset;                                                          \
4222
4223         if (mono_jit_trace_calls != NULL && mono_trace_eval (method))
4224                 tracing = 1;
4225
4226         cfg->code_size   = 512;
4227         cfg->native_code = code = g_malloc (cfg->code_size);
4228
4229         s390_stm  (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
4230
4231         if (cfg->flags & MONO_CFG_HAS_ALLOCA) {
4232                 cfg->used_int_regs |= 1 << 11;
4233         }
4234
4235         alloc_size = cfg->stack_offset;
4236
4237         cfg->stack_usage = alloc_size;
4238         s390_lr   (code, s390_r11, STK_BASE);
4239         if (s390_is_uimm16 (alloc_size)) {
4240                 s390_ahi  (code, STK_BASE, -alloc_size);
4241         } else {
4242                 int stackSize = alloc_size;
4243                 while (stackSize > 32767) {
4244                         s390_ahi  (code, STK_BASE, -32767);
4245                         stackSize -= 32767;
4246                 }
4247                 s390_ahi  (code, STK_BASE, -stackSize);
4248         }
4249         s390_st   (code, s390_r11, 0, STK_BASE, 0);
4250
4251         if (cfg->frame_reg != STK_BASE)
4252                 s390_lr (code, s390_r11, STK_BASE);
4253
4254         /* compute max_offset in order to use short forward jumps
4255          * we always do it on s390 because the immediate displacement
4256          * for jumps is too small
4257          */
4258         max_offset = 0;
4259         for (bb = cfg->bb_entry; bb; bb = bb->next_bb) {
4260                 MonoInst *ins = bb->code;
4261                 bb->max_offset = max_offset;
4262
4263                 if (cfg->prof_options & MONO_PROFILE_COVERAGE)
4264                         max_offset += 6;
4265
4266                 while (ins) {
4267                         max_offset += ((guint8 *)ins_spec [ins->opcode])[MONO_INST_LEN];
4268                         ins = ins->next;
4269                 }
4270         }
4271
4272         /* load arguments allocated to register from the stack */
4273         sig = mono_method_signature (method);
4274         pos = 0;
4275
4276         cinfo = calculate_sizes (sig, &sz, sig->pinvoke);
4277
4278         if (cinfo->struct_ret) {
4279                 ArgInfo *ainfo = &cinfo->ret;
4280                 inst         = cfg->ret;
4281                 inst->unused = ainfo->vtsize;
4282                 s390_st (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4283         }
4284
4285         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
4286                 ArgInfo *ainfo = cinfo->args + i;
4287                 inst = cfg->varinfo [pos];
4288
4289                 if (inst->opcode == OP_REGVAR) {
4290                         if (ainfo->regtype == RegTypeGeneral)
4291                                 s390_lr (code, inst->dreg, ainfo->reg);
4292                         else if (ainfo->regtype == RegTypeFP) {
4293                                 if (inst->dreg != ainfo->reg) {
4294                                         if (ainfo->size == 4) {
4295                                                 s390_ledbr (code, inst->dreg, ainfo->reg);
4296                                         } else {
4297                                                 s390_ldr   (code, inst->dreg, ainfo->reg);
4298                                         }
4299                                 }
4300                         }
4301                         else if (ainfo->regtype == RegTypeBase) {
4302                                 s390_lr  (code, s390_r13, STK_BASE);
4303                                 s390_ahi (code, s390_r13, alloc_size);
4304                                 s390_l   (code, inst->dreg, 0, s390_r13, ainfo->offset);
4305                         } else
4306                                 g_assert_not_reached ();
4307
4308                         if (cfg->verbose_level > 2)
4309                                 g_print ("Argument %d assigned to register %s\n",
4310                                          pos, mono_arch_regname (inst->dreg));
4311                 } else {
4312                         if (ainfo->regtype == RegTypeGeneral) {
4313                                 if (!((ainfo->reg >= 2) && (ainfo->reg <= 6)))
4314                                         g_assert_not_reached();
4315                                 switch (ainfo->size) {
4316                                 case 1:
4317                                         s390_stc (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4318                                         break;
4319                                 case 2:
4320                                         s390_sth (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4321                                         break;
4322                                 case 8:
4323                                         s390_stm (code, ainfo->reg, ainfo->reg + 1,
4324                                                   inst->inst_basereg, inst->inst_offset);
4325                                         break;
4326                                 default:
4327                                         s390_st  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4328                                 }
4329                         } else if (ainfo->regtype == RegTypeBase) {
4330                         } else if (ainfo->regtype == RegTypeFP) {
4331                                 if (ainfo->size == 8)
4332                                         s390_std (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4333                                 else if (ainfo->size == 4)
4334                                         s390_ste (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4335                                 else
4336                                         g_assert_not_reached ();
4337                         } else if (ainfo->regtype == RegTypeStructByVal) {
4338                                 int doffset = inst->inst_offset;
4339                                 int reg;
4340                                 if (ainfo->reg != STK_BASE)
4341                                         reg = ainfo->reg;
4342                                 else {
4343                                         reg = s390_r0;
4344                                         s390_lr  (code, s390_r13, STK_BASE);
4345                                         s390_ahi (code, s390_r13, alloc_size);
4346                                 }
4347                                 switch (ainfo->size) {
4348                                         case 1:
4349                                                 if (ainfo->reg == STK_BASE)
4350                                                         s390_ic  (code, reg, 0, s390_r13, ainfo->offset+3);
4351                                                 s390_stc (code, reg, 0, inst->inst_basereg, doffset);
4352                                                 break;
4353                                         case 2:
4354                                                 if (ainfo->reg == STK_BASE)
4355                                                         s390_lh  (code, reg, 0, s390_r13, ainfo->offset+2);
4356                                                 s390_sth (code, reg, 0, inst->inst_basereg, doffset);
4357                                                 break;
4358                                         case 4:
4359                                                 if (ainfo->reg == STK_BASE)
4360                                                         s390_l   (code, reg, 0, s390_r13, ainfo->offset);
4361                                                 s390_st  (code, reg, 0, inst->inst_basereg, doffset);
4362                                                 break;
4363                                         case 8:
4364                                                 if (ainfo->reg == STK_BASE)
4365                                                         s390_lm  (code, s390_r0, s390_r1, s390_r13, ainfo->offset);
4366                                                 s390_stm (code, reg, reg+1, inst->inst_basereg, doffset);
4367                                                 break;
4368                                 }
4369                         } else if (ainfo->regtype == RegTypeStructByAddr) {
4370                                 if (ainfo->reg != STK_BASE)
4371                                         s390_st  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4372                         } else
4373                                 g_assert_not_reached ();
4374                 }
4375                 pos++;
4376         }
4377
4378         if (method->save_lmf) {
4379                 /*---------------------------------------------------------------*/
4380                 /* we build the MonoLMF structure on the stack - see mini-s390.h */
4381                 /*---------------------------------------------------------------*/
4382                 lmfOffset = alloc_size - sizeof(MonoLMF);
4383
4384                 s390_lr    (code, s390_r13, cfg->frame_reg);
4385                 if (s390_is_uimm16(lmfOffset))
4386                         s390_ahi   (code, s390_r13, lmfOffset);
4387                 else {
4388                         s390_basr (code, s390_r14, 0);
4389                         s390_j    (code, 4);
4390                         s390_word (code, lmfOffset);
4391                         s390_a    (code, s390_r13, 0, s390_r14, 4);
4392                 }
4393
4394                 /*---------------------------------------------------------------*/
4395                 /* Preserve the parameter registers while we fix up the lmf      */
4396                 /*---------------------------------------------------------------*/
4397                 s390_stm   (code, s390_r2, s390_r6, s390_r13,
4398                             G_STRUCT_OFFSET(MonoLMF, pregs[0]));
4399
4400                 /*---------------------------------------------------------------*/
4401                 /* On return from this call r2 have the address of the &lmf      */
4402                 /*---------------------------------------------------------------*/
4403                 mono_add_patch_info (cfg, code - cfg->native_code,
4404                                      MONO_PATCH_INFO_INTERNAL_METHOD,
4405                                      (gpointer)"mono_get_lmf_addr");
4406                 s390_brasl (code, s390_r14, 0);
4407
4408                 /*---------------------------------------------------------------*/
4409                 /* Set lmf.lmf_addr = jit_tls->lmf                               */
4410                 /*---------------------------------------------------------------*/
4411                 s390_st    (code, s390_r2, 0, s390_r13,
4412                             G_STRUCT_OFFSET(MonoLMF, lmf_addr));
4413
4414                 /*---------------------------------------------------------------*/
4415                 /* Get current lmf                                               */
4416                 /*---------------------------------------------------------------*/
4417                 s390_l     (code, s390_r0, 0, s390_r2, 0);
4418
4419                 /*---------------------------------------------------------------*/
4420                 /* Set our lmf as the current lmf                                */
4421                 /*---------------------------------------------------------------*/
4422                 s390_st    (code, s390_r13, 0, s390_r2, 0);
4423
4424                 /*---------------------------------------------------------------*/
4425                 /* Have our lmf.previous_lmf point to the last lmf               */
4426                 /*---------------------------------------------------------------*/
4427                 s390_st    (code, s390_r0, 0, s390_r13,
4428                             G_STRUCT_OFFSET(MonoLMF, previous_lmf));
4429
4430                 /*---------------------------------------------------------------*/
4431                 /* save method info                                              */
4432                 /*---------------------------------------------------------------*/
4433                 s390_basr  (code, s390_r1, 0);
4434                 s390_j     (code, 4);
4435                 s390_word  (code, method);
4436                 s390_l     (code, s390_r1, 0, s390_r1, 4);
4437                 s390_st    (code, s390_r1, 0, s390_r13,
4438                             G_STRUCT_OFFSET(MonoLMF, method));
4439
4440                 /*---------------------------------------------------------------*/
4441                 /* save the current IP                                           */
4442                 /*---------------------------------------------------------------*/
4443                 s390_st    (code, STK_BASE, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, ebp));
4444                 s390_basr  (code, s390_r1, 0);
4445                 s390_la    (code, s390_r1, 0, s390_r1, 0);
4446                 s390_st    (code, s390_r1, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, eip));
4447
4448                 /*---------------------------------------------------------------*/
4449                 /* Save general and floating point registers                     */
4450                 /*---------------------------------------------------------------*/
4451                 s390_stm   (code, s390_r2, s390_r12, s390_r13,
4452                             G_STRUCT_OFFSET(MonoLMF, gregs[2]));
4453                 for (i = 0; i < 16; i++) {
4454                         s390_std  (code, i, 0, s390_r13,
4455                                    G_STRUCT_OFFSET(MonoLMF, fregs[i]));
4456                 }
4457
4458                 /*---------------------------------------------------------------*/
4459                 /* Restore the parameter registers now that we've set up the lmf */
4460                 /*---------------------------------------------------------------*/
4461                 s390_lm    (code, s390_r2, s390_r6, s390_r13,
4462                             G_STRUCT_OFFSET(MonoLMF, pregs[0]));
4463         }
4464
4465         if (tracing)
4466                 code = mono_arch_instrument_prolog(cfg, enter_method, code, TRUE);
4467
4468         cfg->code_len = code - cfg->native_code;
4469         g_free (cinfo);
4470
4471         return code;
4472 }
4473
4474 /*========================= End of Function ========================*/
4475
4476 /*------------------------------------------------------------------*/
4477 /*                                                                  */
4478 /* Name         - mono_arch_emit_epilog                             */
4479 /*                                                                  */
4480 /* Function     - Emit the instructions for a function epilog.      */
4481 /*                                                                  */
4482 /*------------------------------------------------------------------*/
4483
4484 void
4485 mono_arch_emit_epilog (MonoCompile *cfg)
4486 {
4487         MonoMethod *method = cfg->method;
4488         int tracing = 0;
4489         guint8 *code;
4490         int max_epilog_size = 96;
4491
4492         if (cfg->method->save_lmf)
4493                 max_epilog_size += 128;
4494
4495         if (mono_jit_trace_calls != NULL)
4496                 max_epilog_size += 128;
4497
4498         if (cfg->prof_options & MONO_PROFILE_ENTER_LEAVE)
4499                 max_epilog_size += 128;
4500
4501         while ((cfg->code_len + max_epilog_size) > (cfg->code_size - 16)) {
4502                 cfg->code_size  *= 2;
4503                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
4504                 mono_jit_stats.code_reallocs++;
4505         }
4506
4507         code = cfg->native_code + cfg->code_len;
4508
4509         if (mono_jit_trace_calls != NULL && mono_trace_eval (method)) {
4510                 code = mono_arch_instrument_epilog (cfg, leave_method, code, TRUE);
4511                 tracing = 1;
4512         }
4513
4514         if (method->save_lmf)
4515                 restoreLMF(code, cfg->frame_reg, cfg->stack_usage);
4516
4517         if (cfg->flags & MONO_CFG_HAS_ALLOCA)
4518                 s390_l (code, STK_BASE, 0, STK_BASE, 0);
4519         else
4520                 code = backUpStackPtr(cfg, code, STK_BASE);
4521
4522         s390_lm  (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
4523         s390_br  (code, s390_r14);
4524
4525         cfg->code_len = code - cfg->native_code;
4526
4527         g_assert (cfg->code_len < cfg->code_size);
4528
4529 }
4530
4531 /*========================= End of Function ========================*/
4532
4533 /*------------------------------------------------------------------*/
4534 /*                                                                  */
4535 /* Name         - mono_arch_emit_exceptions                         */
4536 /*                                                                  */
4537 /* Function     - Emit the blocks to handle exception conditions.   */
4538 /*                                                                  */
4539 /*------------------------------------------------------------------*/
4540
4541 void
4542 mono_arch_emit_exceptions (MonoCompile *cfg)
4543 {
4544         MonoJumpInfo    *patch_info;
4545         guint8          *code;
4546         int             nThrows = 0,
4547                         exc_count = 0,
4548                         iExc;
4549         guint32         code_size;
4550         MonoClass       *exc_classes [MAX_EXC];
4551         guint8          *exc_throw_start [MAX_EXC],
4552                         *exc_throw_end [MAX_EXC];
4553
4554         for (patch_info = cfg->patch_info;
4555              patch_info;
4556              patch_info = patch_info->next) {
4557                 if (patch_info->type == MONO_PATCH_INFO_EXC)
4558                         exc_count++;
4559         }
4560
4561         code_size = exc_count * 26;
4562
4563         while ((cfg->code_len + code_size) > (cfg->code_size - 16)) {
4564                 cfg->code_size  *= 2;
4565                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
4566                 mono_jit_stats.code_reallocs++;
4567         }
4568
4569         code = cfg->native_code + cfg->code_len;
4570
4571         /*---------------------------------------------------------------------*/
4572         /* Add code to raise exceptions                                        */
4573         /*---------------------------------------------------------------------*/
4574         for (patch_info = cfg->patch_info; patch_info; patch_info = patch_info->next) {
4575                 switch (patch_info->type) {
4576                 case MONO_PATCH_INFO_EXC: {
4577                         guint8 *ip = patch_info->ip.i + cfg->native_code;
4578                         MonoClass *exc_class;
4579                         guint32 throw_ip;
4580
4581                         /*-----------------------------------------------------*/
4582                         /* Patch the branch in epilog to come here             */
4583                         /*-----------------------------------------------------*/
4584                         s390_patch (ip + 2, (guint32) (S390_RELATIVE(code,ip)));
4585
4586                         exc_class = mono_class_from_name (mono_defaults.corlib,
4587                                                           "System",
4588                                                           patch_info->data.name);
4589                         g_assert (exc_class);
4590                         throw_ip = patch_info->ip.i;
4591
4592                         for (iExc = 0; iExc < nThrows; ++iExc)
4593                                 if (exc_classes [iExc] == exc_class)
4594                                         break;
4595
4596                         if (iExc < nThrows) {
4597                                 s390_jcl (code, S390_CC_UN, (guint32) exc_throw_start [iExc]);
4598                                 patch_info->type = MONO_PATCH_INFO_NONE;
4599                         } else {
4600
4601                                 if (nThrows < MAX_EXC) {
4602                                         exc_classes [nThrows]     = exc_class;
4603                                         exc_throw_start [nThrows] = code;
4604                                 }
4605
4606                                 /*---------------------------------------------*/
4607                                 /* Patch the parameter passed to the handler   */
4608                                 /*---------------------------------------------*/
4609                                 s390_basr (code, s390_r13, 0);
4610                                 s390_j    (code, 4);
4611                                 s390_word (code, patch_info->data.target);
4612                                 /*---------------------------------------------*/
4613                                 /* Load return address & parameter register    */
4614                                 /*---------------------------------------------*/
4615                                 s390_larl (code, s390_r14, S390_RELATIVE((patch_info->ip.i +
4616                                                            cfg->native_code + 8), code));
4617                                 s390_l    (code, s390_r2, 0, s390_r13, 4);
4618                                 /*---------------------------------------------*/
4619                                 /* Reuse the current patch to set the jump     */
4620                                 /*---------------------------------------------*/
4621                                 patch_info->type      = MONO_PATCH_INFO_INTERNAL_METHOD;
4622                                 patch_info->data.name = "mono_arch_throw_exception_by_name";
4623                                 patch_info->ip.i      = code - cfg->native_code;
4624                                 s390_jcl  (code, S390_CC_UN, 0);
4625                         }
4626                         break;
4627                 }
4628                 default:
4629                         /* do nothing */
4630                         break;
4631                 }
4632         }
4633
4634         cfg->code_len = code - cfg->native_code;
4635
4636         g_assert (cfg->code_len < cfg->code_size);
4637
4638 }
4639
4640 /*========================= End of Function ========================*/
4641
4642 /*------------------------------------------------------------------*/
4643 /*                                                                  */
4644 /* Name         - mono_arch_setup_jit_tls_data                      */
4645 /*                                                                  */
4646 /* Function     - Setup the JIT's Thread Level Specific Data.       */
4647 /*                                                                  */
4648 /*------------------------------------------------------------------*/
4649
4650 void
4651 mono_arch_setup_jit_tls_data (MonoJitTlsData *tls)
4652 {
4653
4654         if (!tls_offset_inited) {
4655                 tls_offset_inited = TRUE;
4656
4657 #if HAVE_KW_THREAD
4658 # if 0
4659         __asm__ ("\tear\t%r1,0\n"
4660                  "\tlr\t%0,%3\n"
4661                  "\tsr\t%0,%r1\n"
4662                  "\tlr\t%1,%4\n"
4663                  "\tsr\t%1,%r1\n"
4664                  "\tlr\t%2,%5\n"
4665                  "\tsr\t%2,%r1\n"
4666                  : "=r" (appdomain_tls_offset),
4667                    "=r" (thread_tls_offset),
4668                    "=r" (lmf_tls_offset)
4669                  : "r" (&tls_appdomain),
4670                    "r" (&tls_current_object),
4671                    "r" (&mono_lmf_addr)
4672                  : "1", "cc");
4673 # endif
4674 #endif
4675         }
4676
4677         if (!lmf_addr_key_inited) {
4678                 lmf_addr_key_inited = TRUE;
4679                 pthread_key_create (&lmf_addr_key, NULL);
4680         }
4681         pthread_setspecific (lmf_addr_key, &tls->lmf);
4682
4683 }
4684
4685 /*========================= End of Function ========================*/
4686
4687 /*------------------------------------------------------------------*/
4688 /*                                                                  */
4689 /* Name         - mono_arch_free_jit_tls_data                       */
4690 /*                                                                  */
4691 /* Function     - Free tls data.                                    */
4692 /*                                                                  */
4693 /*------------------------------------------------------------------*/
4694
4695 void
4696 mono_arch_free_jit_tls_data (MonoJitTlsData *tls)
4697 {
4698
4699 }
4700
4701 /*========================= End of Function ========================*/
4702
4703 /*------------------------------------------------------------------*/
4704 /*                                                                  */
4705 /* Name         - mono_arch_emit_this_vret_args                     */
4706 /*                                                                  */
4707 /* Function     -                                                   */
4708 /*                                                                  */
4709 /*------------------------------------------------------------------*/
4710
4711 void
4712 mono_arch_emit_this_vret_args (MonoCompile *cfg, MonoCallInst *inst, int this_reg, int this_type, int vt_reg)
4713 {
4714         int this_dreg = s390_r2;
4715
4716         if (vt_reg != -1)
4717                 this_dreg = s390_r3;
4718
4719         /* add the this argument */
4720         if (this_reg != -1) {
4721                 MonoInst *this;
4722                 MONO_INST_NEW (cfg, this, OP_SETREG);
4723                 this->type  = this_type;
4724                 this->sreg1 = this_reg;
4725                 this->dreg  = mono_regstate_next_int (cfg->rs);
4726                 mono_bblock_add_inst (cfg->cbb, this);
4727                 mono_call_inst_add_outarg_reg (cfg, inst, this->dreg, this_dreg, FALSE);
4728         }
4729
4730         if (vt_reg != -1) {
4731                 MonoInst *vtarg;
4732                 MONO_INST_NEW (cfg, vtarg, OP_SETREG);
4733                 vtarg->type  = STACK_MP;
4734                 vtarg->sreg1 = vt_reg;
4735                 vtarg->dreg  = mono_regstate_next_int (cfg->rs);
4736                 mono_bblock_add_inst (cfg->cbb, vtarg);
4737                 mono_call_inst_add_outarg_reg (cfg, inst, vtarg->dreg, s390_r2, FALSE);
4738         }
4739 }
4740
4741 /*========================= End of Function ========================*/
4742
4743 /*------------------------------------------------------------------*/
4744 /*                                                                  */
4745 /* Name         - mono_arch_get_inst_for_method                   */
4746 /*                                                                  */
4747 /* Function     - Check for opcodes we can handle directly in       */
4748 /*                hardware.                                         */
4749 /*                                                                  */
4750 /*------------------------------------------------------------------*/
4751
4752 MonoInst*
4753 mono_arch_get_inst_for_method (MonoCompile *cfg, MonoMethod *cmethod,
4754                                MonoMethodSignature *fsig, MonoInst **args)
4755 {
4756         MonoInst *ins = NULL;
4757
4758         if (cmethod->klass == mono_defaults.math_class) {
4759                 if (strcmp (cmethod->name, "Sqrt") == 0) {
4760                         MONO_INST_NEW (cfg, ins, OP_SQRT);
4761                         ins->inst_i0 = args [0];
4762                 }
4763         } else if (cmethod->klass == mono_defaults.thread_class &&
4764                            strcmp (cmethod->name, "MemoryBarrier") == 0) {
4765                 MONO_INST_NEW (cfg, ins, OP_MEMORY_BARRIER);
4766         } else if(cmethod->klass->image == mono_defaults.corlib &&
4767                            (strcmp (cmethod->klass->name_space, "System.Threading") == 0) &&
4768                            (strcmp (cmethod->klass->name, "Interlocked") == 0)) {
4769
4770                 if (strcmp (cmethod->name, "Increment") == 0 &&
4771                     fsig->params [0]->type == MONO_TYPE_I4) {
4772                         MonoInst *ins_iconst;
4773
4774                         MONO_INST_NEW (cfg, ins, OP_ATOMIC_ADD_NEW_I4);
4775                         MONO_INST_NEW (cfg, ins_iconst, OP_ICONST);
4776                         ins_iconst->inst_c0 = 1;
4777
4778                         ins->inst_i0 = args [0];
4779                         ins->inst_i1 = ins_iconst;
4780                 } else if (strcmp (cmethod->name, "Decrement") == 0 &&
4781                            fsig->params [0]->type == MONO_TYPE_I4) {
4782                         MonoInst *ins_iconst;
4783
4784                         MONO_INST_NEW (cfg, ins, OP_ATOMIC_ADD_NEW_I4);
4785                         MONO_INST_NEW (cfg, ins_iconst, OP_ICONST);
4786                         ins_iconst->inst_c0 = -1;
4787
4788                         ins->inst_i0 = args [0];
4789                         ins->inst_i1 = ins_iconst;
4790                 } else if (strcmp (cmethod->name, "Exchange") == 0 &&
4791                            fsig->params [0]->type == MONO_TYPE_I4) {
4792                         MONO_INST_NEW (cfg, ins, OP_ATOMIC_EXCHANGE_I4);
4793
4794                         ins->inst_i0 = args [0];
4795                         ins->inst_i1 = args [1];
4796                 } else if (strcmp (cmethod->name, "Add") == 0 &&
4797                            fsig->params [0]->type == MONO_TYPE_I4) {
4798                         MONO_INST_NEW (cfg, ins, OP_ATOMIC_ADD_I4);
4799
4800                         ins->inst_i0 = args [0];
4801                         ins->inst_i1 = args [1];
4802                 }
4803         }
4804         return ins;
4805 }
4806
4807 /*========================= End of Function ========================*/
4808
4809 /*------------------------------------------------------------------*/
4810 /*                                                                  */
4811 /* Name         - mono_arch_print_tree                              */
4812 /*                                                                  */
4813 /* Function     - Print platform-specific opcode details.           */
4814 /*                                                                  */
4815 /* Returns      - 1 - opcode details have been printed              */
4816 /*                0 - opcode details have not been printed          */
4817 /*                                                                  */
4818 /*------------------------------------------------------------------*/
4819
4820 gboolean
4821 mono_arch_print_tree (MonoInst *tree, int arity)
4822 {
4823         gboolean done;
4824
4825         switch (tree->opcode) {
4826                 case OP_S390_LOADARG:
4827                 case OP_S390_ARGREG:
4828                 case OP_S390_ARGPTR:
4829                         printf ("[0x%lx(%s)]", tree->inst_offset,
4830                                 mono_arch_regname (tree->inst_basereg));
4831                         done = 1;
4832                         break;
4833                 case OP_S390_STKARG:
4834                         printf ("[0x%lx(previous_frame)]",
4835                                 tree->inst_offset);
4836                         done = 1;
4837                         break;
4838                 case OP_S390_MOVE:
4839                         printf ("[0x%lx(%d,%s),0x%lx(%s)]",
4840                                 tree->inst_offset, tree->unused,
4841                                 mono_arch_regname(tree->dreg), tree->inst_imm,
4842                                 mono_arch_regname(tree->sreg1));
4843                         done = 1;
4844                         break;
4845                 case OP_S390_SETF4RET:
4846                         printf ("[f%ld,f%ld]",
4847                                 mono_arch_regname (tree->dreg),
4848                                 mono_arch_regname (tree->sreg1));
4849                         done = 1;
4850                         break;
4851                 case OP_TLS_GET:
4852                         printf ("[0x%lx(0x%lx,%s)]", tree->inst_offset,
4853                                 tree->inst_imm,
4854                                 mono_arch_regname (tree->sreg1));
4855                         done = 1;
4856                         break;
4857                 case OP_S390_BKCHAIN:
4858                         printf ("[previous_frame(%s)]",
4859                                 mono_arch_regname (tree->sreg1));
4860                         done = 1;
4861                         break;
4862                 default:
4863                         done = 0;
4864         }
4865         return (done);
4866 }
4867
4868 /*========================= End of Function ========================*/
4869
4870 /*------------------------------------------------------------------*/
4871 /*                                                                  */
4872 /* Name         - mono_arch_regalloc_cost                           */
4873 /*                                                                  */
4874 /* Function     - Determine the cost, in the number of memory       */
4875 /*                references, of the action of allocating the var-  */
4876 /*                iable VMV into a register during global register  */
4877 /*                allocation.                                       */
4878 /*                                                                  */
4879 /* Returns      - Cost                                              */
4880 /*                                                                  */
4881 /*------------------------------------------------------------------*/
4882
4883 guint32
4884 mono_arch_regalloc_cost (MonoCompile *cfg, MonoMethodVar *vmv)
4885 {
4886         /* FIXME: */
4887         return 2;
4888 }
4889
4890 /*========================= End of Function ========================*/
4891
4892 /*------------------------------------------------------------------*/
4893 /*                                                                  */
4894 /* Name         - mono_arch_get_domain_intrinsic                    */
4895 /*                                                                  */
4896 /* Function     -                                                   */
4897 /*                                                                  */
4898 /* Returns      -                                                   */
4899 /*                                                                  */
4900 /*------------------------------------------------------------------*/
4901
4902 MonoInst *
4903 mono_arch_get_domain_intrinsic (MonoCompile* cfg)
4904 {
4905         MonoInst *ins;
4906
4907         if (appdomain_tls_offset == -1)
4908                 return NULL;
4909
4910         MONO_INST_NEW (cfg, ins, OP_TLS_GET);
4911         ins->inst_offset = appdomain_tls_offset;
4912         return (ins);
4913 }
4914
4915 /*========================= End of Function ========================*/
4916
4917 /*------------------------------------------------------------------*/
4918 /*                                                                  */
4919 /* Name         - mono_arch_get_thread_intrinsic                    */
4920 /*                                                                  */
4921 /* Function     -                                                   */
4922 /*                                                                  */
4923 /* Returns      -                                                   */
4924 /*                                                                  */
4925 /*------------------------------------------------------------------*/
4926
4927 MonoInst *
4928 mono_arch_get_thread_intrinsic (MonoCompile* cfg)
4929 {
4930         MonoInst *ins;
4931
4932         if (thread_tls_offset == -1)
4933                 return NULL;
4934
4935         MONO_INST_NEW (cfg, ins, OP_TLS_GET);
4936         ins->inst_offset = thread_tls_offset;
4937         return (ins);
4938 }
4939
4940 /*========================= End of Function ========================*/
4941
4942 /*------------------------------------------------------------------*/
4943 /*                                                                  */
4944 /* Name         - mono_arch_flush_register_windows                  */
4945 /*                                                                  */
4946 /* Function     -                                                   */
4947 /*                                                                  */
4948 /* Returns      -                                                   */
4949 /*                                                                  */
4950 /*------------------------------------------------------------------*/
4951
4952 void
4953 mono_arch_flush_register_windows (void)
4954 {
4955 }
4956
4957 /*========================= End of Function ========================*/
4958
4959 /*------------------------------------------------------------------*/
4960 /*                                                                  */
4961 /* Name         - mono_arch_get_lmf_addr                            */
4962 /*                                                                  */
4963 /* Function     -                                                   */
4964 /*                                                                  */
4965 /* Returns      -                                                   */
4966 /*                                                                  */
4967 /*------------------------------------------------------------------*/
4968
4969 gpointer
4970 mono_arch_get_lmf_addr (void)
4971 {
4972         return pthread_getspecific (lmf_addr_key);
4973 }
4974
4975
4976 /*========================= End of Function ========================*/