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_uimm16(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_uimm16(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_uimm16(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_uimm16(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 #undef DEBUG
 100 #define DEBUG(a) if (cfg->verbose_level > 1) a
 101 #define reg_is_freeable(r) ((r) >= 3 && (r) <= 10)
 102 #define freg_is_freeable(r) ((r) >= 1 && (r) <= 14)
 103
 104 /*----------------------------------------*/
 105 /* use s390_r3-s390_r10 as temp registers */
 106 /*----------------------------------------*/
 107 #define S390_CALLER_REGS  (0x03f8)
 108
 109 /*----------------------------------------*/
 110 /* use s390_f2-s390_f14 as temp registers */
 111 /*----------------------------------------*/
 112 #define S390_CALLER_FREGS (0x73f8)
 113
 114 #define S390_TRACE_STACK_SIZE (5*sizeof(gint32)+3*sizeof(gdouble))
 115
 116 /*========================= End of Defines =========================*/
 117
 118 /*------------------------------------------------------------------*/
 119 /*                 I n c l u d e s                                  */
 120 /*------------------------------------------------------------------*/
 121
 122 #include "mini.h"
 123 #include <string.h>
 124
 125 #include <mono/metadata/appdomain.h>
 126 #include <mono/metadata/debug-helpers.h>
 127 #include <mono/metadata/profiler-private.h>
 128 #include <mono/utils/mono-math.h>
 129
 130 #include "mini-s390.h"
 131 #include "inssel.h"
 132 #include "cpu-s390.h"
 133
 134 /*========================= End of Includes ========================*/
 135
 136 /*------------------------------------------------------------------*/
 137 /*                 T y p e d e f s                                  */
 138 /*------------------------------------------------------------------*/
 139
 140 typedef struct {
 141         guint stack_size,
 142               local_size,
 143               code_size,
 144               retStruct;
 145 } size_data;
 146
 147 /*------------------------------------------------------------------*/
 148 /* Used by the instrument_emit_epilog                               */
 149 /*------------------------------------------------------------------*/
 150
 151 enum {
 152         SAVE_NONE,
 153         SAVE_STRUCT,
 154         SAVE_ONE,
 155         SAVE_TWO,
 156         SAVE_FP
 157 };
 158
 159 typedef struct {
 160         int born_in;
 161         int killed_in;
 162         int last_use;
 163         int prev_use;
 164 } RegTrack;
 165
 166 typedef struct InstList InstList;
 167
 168 struct InstList {
 169         InstList *prev;
 170         InstList *next;
 171         MonoInst *data;
 172 };
 173
 174 enum {
 175         RegTypeGeneral,
 176         RegTypeBase,
 177         RegTypeFP,
 178         RegTypeStructByVal,
 179         RegTypeStructByAddr
 180 };
 181
 182 typedef struct {
 183         gint32  offset;         /* offset from caller's stack */
 184         gint32  offparm;        /* offset on callee's stack */
 185         guint16 vtsize;         /* in param area */
 186         guint8  reg;
 187         guint8  regtype;        /* See RegType* */
 188         guint32 size;           /* Size of structure used by RegTypeStructByVal */
 189 } ArgInfo;
 190
 191 typedef struct {
 192         int nargs;
 193         guint32 stack_usage;
 194         guint32 struct_ret;
 195         ArgInfo ret;
 196         ArgInfo args [1];
 197 } CallInfo;
 198
 199 typedef struct {
 200         gint32  gr[5];          /* R2-R6                            */
 201         gdouble fp[3];          /* F0-F2                            */
 202 } __attribute__ ((packed)) RegParm;
 203
 204 /*========================= End of Typedefs ========================*/
 205
 206 /*------------------------------------------------------------------*/
 207 /*                   P r o t o t y p e s                            */
 208 /*------------------------------------------------------------------*/
 209
 210 static guint32 * emit_memcpy (guint8 *, int, int, int, int, int);
 211 static void indent (int);
 212 static guint8 * restoreLMF(MonoCompile *, guint8 *);
 213 static guint8 * backUpStackPtr(MonoCompile *, guint8 *);
 214 static void decodeParm (MonoType *, void *, int);
 215 static void enter_method (MonoMethod *, RegParm *, char *);
 216 static void leave_method (MonoMethod *, ...);
 217 static gboolean is_regsize_var (MonoType *);
 218 static void add_general (guint *, size_data *, ArgInfo *, gboolean);
 219 static CallInfo * calculate_sizes (MonoMethodSignature *, size_data *, gboolean);
 220 static void peephole_pass (MonoCompile *, MonoBasicBlock *);
 221 static int mono_spillvar_offset (MonoCompile *, int);
 222 static int mono_spillvar_offset_float (MonoCompile *, int);
 223 static void print_ins (int, MonoInst *);
 224 static void print_regtrack (RegTrack *, int);
 225 static InstList * inst_list_prepend (MonoMemPool *, InstList *, MonoInst *);
 226 static int get_register_force_spilling (MonoCompile *, InstList *, MonoInst *, int);
 227 static int get_register_spilling (MonoCompile *, InstList *, MonoInst *, guint32, int);
 228 static int get_float_register_spilling (MonoCompile *, InstList *, MonoInst *, guint32, int);
 229 static MonoInst * create_copy_ins (MonoCompile *, int, int, MonoInst *);
 230 static MonoInst * create_copy_ins_float (MonoCompile *, int, int, MonoInst *);
 231 static MonoInst * create_spilled_store (MonoCompile *, int, int, int, MonoInst *);
 232 static MonoInst * create_spilled_store_float (MonoCompile *, int, int, int, MonoInst *);
 233 static void insert_before_ins (MonoInst *, InstList *, MonoInst *);
 234 static int alloc_int_reg (MonoCompile *, InstList *, MonoInst *, int, guint32);
 235 static guchar * emit_float_to_int (MonoCompile *, guchar *, int, int, int, gboolean);
 236 static unsigned char * mono_emit_stack_alloc (guchar *, MonoInst *);
 237
 238 /*========================= End of Prototypes ======================*/
 239
 240 /*------------------------------------------------------------------*/
 241 /*                 G l o b a l   V a r i a b l e s                  */
 242 /*------------------------------------------------------------------*/
 243
 244 int mono_exc_esp_offset = 0;
 245
 246 static int indent_level = 0;
 247
 248 static const char*const * ins_spec = s390;
 249
 250 static gboolean tls_offset_inited = FALSE;
 251
 252 /*====================== End of Global Variables ===================*/
 253
 254 /*------------------------------------------------------------------*/
 255 /*                                                                  */
 256 /* Name         - mono_arch_regname                                 */
 257 /*                                                                  */
 258 /* Function     - Returns the name of the register specified by     */
 259 /*                the input parameter.                              */
 260 /*                                                                  */
 261 /*------------------------------------------------------------------*/
 262
 263 const char*
 264 mono_arch_regname (int reg) {
 265         static const char * rnames[] = {
 266                 "s390_r0", "s390_sp", "s390_r2", "s390_r3", "s390_r4",
 267                 "s390_r5", "s390_r6", "s390_r7", "s390_r8", "s390_r9",
 268                 "s390_r10", "s390_r11", "s390_r12", "s390_r13", "s390_r14",
 269                 "s390_r15"
 270         };
 271         if (reg >= 0 && reg < 16)
 272                 return rnames [reg];
 273         return "unknown";
 274 }
 275
 276 /*========================= End of Function ========================*/
 277
 278 /*------------------------------------------------------------------*/
 279 /*                                                                  */
 280 /* Name         - emit_memcpy                                       */
 281 /*                                                                  */
 282 /* Function     - Emit code to move from memory-to-memory based on  */
 283 /*                the size of the variable. r0 is overwritten.      */
 284 /*                                                                  */
 285 /*------------------------------------------------------------------*/
 286
 287 static guint32*
 288 emit_memcpy (guint8 *code, int size, int dreg, int doffset, int sreg, int soffset)
 289 {
 290         switch (size) {
 291                 case 4 :
 292                         s390_l  (code, s390_r0, 0, sreg, soffset);
 293                         s390_st (code, s390_r0, 0, dreg, doffset);
 294                         break;
 295
 296                 case 3 :
 297                         s390_icm  (code, s390_r0, 14, sreg, soffset);
 298                         s390_stcm (code, s390_r0, 14, dreg, doffset);
 299                         break;
 300
 301                 case 2 :
 302                         s390_lh  (code, s390_r0, 0, sreg, soffset);
 303                         s390_sth (code, s390_r0, 0, dreg, doffset);
 304                         break;
 305
 306                 case 1 :
 307                         s390_ic  (code, s390_r0, 0, sreg, soffset);
 308                         s390_stc (code, s390_r0, 0, dreg, doffset);
 309                         break;
 310
 311                 default :
 312                         while (size > 0) {
 313                                 int len;
 314
 315                                 if (size > 256)
 316                                         len = 256;
 317                                 else
 318                                         len = size;
 319                                 s390_mvc (code, len, dreg, doffset, sreg, soffset);
 320                                 size -= len;
 321                         }
 322         }
 323         return code;
 324 }
 325
 326 /*========================= End of Function ========================*/
 327
 328 /*------------------------------------------------------------------*/
 329 /*                                                                  */
 330 /* Name         - arch_get_argument_info                            */
 331 /*                                                                  */
 332 /* Function     - Gathers information on parameters such as size,   */
 333 /*                alignment, and padding. arg_info should be large  */
 334 /*                enough to hold param_count + 1 entries.           */
 335 /*                                                                  */
 336 /* Parameters   - @csig - Method signature                          */
 337 /*                @param_count - No. of parameters to consider      */
 338 /*                @arg_info - An array to store the result info     */
 339 /*                                                                  */
 340 /* Returns      - Size of the activation frame                      */
 341 /*                                                                  */
 342 /*------------------------------------------------------------------*/
 343
 344 int
 345 mono_arch_get_argument_info (MonoMethodSignature *csig,
 346                              int param_count,
 347                              MonoJitArgumentInfo *arg_info)
 348 {
 349         int k, frame_size = 0;
 350         int size, align, pad;
 351         int offset = 8;
 352
 353         if (MONO_TYPE_ISSTRUCT (csig->ret)) {
 354                 frame_size += sizeof (gpointer);
 355                 offset += 4;
 356         }
 357
 358         arg_info [0].offset = offset;
 359
 360         if (csig->hasthis) {
 361                 frame_size += sizeof (gpointer);
 362                 offset += 4;
 363         }
 364
 365         arg_info [0].size = frame_size;
 366
 367         for (k = 0; k < param_count; k++) {
 368
 369                 if (csig->pinvoke)
 370                         size = mono_type_native_stack_size (csig->params [k], &align);
 371                 else
 372                         size = mono_type_stack_size (csig->params [k], &align);
 373
 374                 frame_size += pad = (align - (frame_size & (align - 1))) & (align - 1);
 375                 arg_info [k].pad = pad;
 376                 frame_size += size;
 377                 arg_info [k + 1].pad = 0;
 378                 arg_info [k + 1].size = size;
 379                 offset += pad;
 380                 arg_info [k + 1].offset = offset;
 381                 offset += size;
 382         }
 383
 384         align = MONO_ARCH_FRAME_ALIGNMENT;
 385         frame_size += pad = (align - (frame_size & (align - 1))) & (align - 1);
 386         arg_info [k].pad = pad;
 387
 388         return frame_size;
 389 }
 390
 391 /*========================= End of Function ========================*/
 392
 393 /*------------------------------------------------------------------*/
 394 /*                                                                  */
 395 /* Name         - restoreLMF                                        */
 396 /*                                                                  */
 397 /* Function     - Restore the LMF state prior to exiting a method.  */
 398 /*                                                                  */
 399 /*------------------------------------------------------------------*/
 400
 401 static inline guint8 *
 402 restoreLMF(MonoCompile *cfg, guint8 *code)
 403 {
 404         int lmfOffset = 0;
 405
 406         s390_lr  (code, s390_r13, cfg->frame_reg);
 407
 408         lmfOffset = cfg->stack_usage -  sizeof(MonoLMF);
 409
 410         /*-------------------------------------------------*/
 411         /* r13 = my lmf                                    */
 412         /*-------------------------------------------------*/
 413         s390_ahi (code, s390_r13, lmfOffset);
 414
 415         /*-------------------------------------------------*/
 416         /* r6 = &jit_tls->lmf                              */
 417         /*-------------------------------------------------*/
 418         s390_l   (code, s390_r6, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, lmf_addr));
 419
 420         /*-------------------------------------------------*/
 421         /* r0 = lmf.previous_lmf                           */
 422         /*-------------------------------------------------*/
 423         s390_l   (code, s390_r0, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, previous_lmf));
 424
 425         /*-------------------------------------------------*/
 426         /* jit_tls->lmf = previous_lmf                     */
 427         /*-------------------------------------------------*/
 428         s390_l   (code, s390_r13, 0, s390_r6, 0);
 429         s390_st  (code, s390_r0, 0, s390_r6, 0);
 430         return (code);
 431 }
 432
 433 /*========================= End of Function ========================*/
 434
 435 /*------------------------------------------------------------------*/
 436 /*                                                                  */
 437 /* Name         - backStackPtr.                                     */
 438 /*                                                                  */
 439 /* Function     - Restore Stack Pointer to previous frame.          */
 440 /*                                                                  */
 441 /*------------------------------------------------------------------*/
 442
 443 static inline guint8 *
 444 backUpStackPtr(MonoCompile *cfg, guint8 *code)
 445 {
 446         int stackSize = cfg->stack_usage;
 447
 448         if (s390_is_imm16 (cfg->stack_usage)) {
 449                 s390_ahi  (code, STK_BASE, cfg->stack_usage);
 450         } else {
 451                 while (stackSize > 32767) {
 452                         s390_ahi  (code, STK_BASE, 32767);
 453                         stackSize -= 32767;
 454                 }
 455                 s390_ahi  (code, STK_BASE, stackSize);
 456         }
 457         return (code);
 458 }
 459
 460 /*========================= End of Function ========================*/
 461
 462 /*------------------------------------------------------------------*/
 463 /*                                                                  */
 464 /* Name         - indent                                            */
 465 /*                                                                  */
 466 /* Function     - Perform nice indenting to current level           */
 467 /*                                                                  */
 468 /*------------------------------------------------------------------*/
 469
 470 static void
 471 indent (int diff) {
 472         int v;
 473         if (diff < 0)
 474                 indent_level += diff;
 475         v = indent_level;
 476         printf("[%3d] ",v);
 477         while (v-- > 0) {
 478                 printf (". ");
 479         }
 480         if (diff > 0)
 481                 indent_level += diff;
 482 }
 483
 484 /*========================= End of Function ========================*/
 485
 486 /*------------------------------------------------------------------*/
 487 /*                                                                  */
 488 /* Name         - decodeParm                                        */
 489 /*                                                                  */
 490 /* Function     - Decode a parameter for the trace.                 */
 491 /*                                                                  */
 492 /*------------------------------------------------------------------*/
 493
 494 static void
 495 decodeParm(MonoType *type, void *curParm, int size)
 496 {
 497         guint32 simpleType;
 498
 499         if (type->byref) {
 500                 printf("[BYREF:%p], ", *((char **) curParm));
 501         } else {
 502                 simpleType = type->type;
 503 enum_parmtype:
 504                 switch (simpleType) {
 505                         case MONO_TYPE_I :
 506                                 printf ("[INTPTR:%p], ", *((int **) curParm));
 507                                 break;
 508                         case MONO_TYPE_U :
 509                                 printf ("[UINTPTR:%p], ", *((int **) curParm));
 510                                 break;
 511                         case MONO_TYPE_BOOLEAN :
 512                                 printf ("[BOOL:%p], ", *((int *) curParm));
 513                                 break;
 514                         case MONO_TYPE_CHAR :
 515                                 printf ("[CHAR:%p], ", *((int *) curParm));
 516                                 break;
 517                         case MONO_TYPE_I1 :
 518                                 printf ("[INT1:%d], ", *((int *) curParm));
 519                                 break;
 520                         case MONO_TYPE_I2 :
 521                                 printf ("[INT2:%d], ", *((int *) curParm));
 522                                 break;
 523                         case MONO_TYPE_I4 :
 524                                 printf ("[INT4:%d], ", *((int *) curParm));
 525                                 break;
 526                         case MONO_TYPE_U1 :
 527                                 printf ("[UINT1:%ud], ", *((unsigned int *) curParm));
 528                                 break;
 529                         case MONO_TYPE_U2 :
 530                                 printf ("[UINT2:%ud], ", *((guint16 *) curParm));
 531                                 break;
 532                         case MONO_TYPE_U4 :
 533                                 printf ("[UINT4:%ud], ", *((guint32 *) curParm));
 534                                 break;
 535                         case MONO_TYPE_U8 :
 536                                 printf ("[UINT8:%ul], ", *((guint64 *) curParm));
 537                                 break;
 538                         case MONO_TYPE_STRING : {
 539                                 MonoString *s = *((MonoString **) curParm);
 540                                 if (s) {
 541                                         g_assert (((MonoObject *) s)->vtable->klass == mono_defaults.string_class);
 542                                         printf("[STRING:%p:%s], ", s, mono_string_to_utf8(s));
 543                                 } else {
 544                                         printf("[STRING:null], ");
 545                                 }
 546                                 break;
 547                         }
 548                         case MONO_TYPE_CLASS :
 549                         case MONO_TYPE_OBJECT : {
 550                                 MonoObject *obj = *((MonoObject **) curParm);
 551                                 MonoClass *class;
 552                                 if (obj) {
 553                                         printf("[CLASS/OBJ:");
 554                                         class = obj->vtable->klass;
 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:%f], ", *((float *) (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                                 if (type->data.klass->enumtype) {
 594                                         simpleType = type->data.klass->enum_basetype->type;
 595                                         printf("{VALUETYPE} - ");
 596                                         goto enum_parmtype;
 597                                 }
 598                                 printf("[VALUETYPE:");
 599                                 for (i = 0; i < size; i++)
 600                                         printf("%02x,", *((guint8 *)curParm+i));
 601                                 printf("]");
 602                                 break;
 603                         }
 604                         default :
 605                                 printf("[?? - %d], ",simpleType);
 606                 }
 607         }
 608 }
 609
 610 /*========================= End of Function ========================*/
 611
 612 /*------------------------------------------------------------------*/
 613 /*                                                                  */
 614 /* Name         - enter_method                                      */
 615 /*                                                                  */
 616 /* Function     - Perform tracing of the entry to the current       */
 617 /*                method.                                           */
 618 /*                                                                  */
 619 /*------------------------------------------------------------------*/
 620
 621 static void
 622 enter_method (MonoMethod *method, RegParm *rParm, char *sp)
 623 {
 624         int i, oParm = 0, iParm = 0;
 625         MonoClass *class;
 626         MonoObject *obj;
 627         MonoJitArgumentInfo *arg_info;
 628         MonoMethodSignature *sig;
 629         char *fname;
 630         guint32 ip;
 631         CallInfo *cinfo;
 632         ArgInfo *ainfo;
 633         size_data sz;
 634         void *curParm;
 635
 636         fname = mono_method_full_name (method, TRUE);
 637         indent (1);
 638         printf ("ENTER: %s(", fname);
 639         g_free (fname);
 640
 641         ip  = (*(guint32 *) (sp+S390_RET_ADDR_OFFSET)) & 0x7fffffff;
 642         printf (") ip: %p sp: %p - ", ip, sp);
 643
 644         if (rParm == NULL)
 645                 return;
 646
 647         sig = method->signature;
 648
 649         cinfo = calculate_sizes (sig, &sz, sig->pinvoke);
 650
 651         if (cinfo->struct_ret) {
 652                 printf ("[VALUERET:%p], ", rParm->gr[0]);
 653                 iParm = 1;
 654         }
 655
 656         if (sig->hasthis) {
 657                 gpointer *this = (gpointer *) rParm->gr[iParm];
 658                 obj = (MonoObject *) this;
 659                 if (method->klass->valuetype) {
 660                         if (obj) {
 661                                 printf("this:[value:%p:%08x], ",
 662                                        this, *((guint32 *)(this+sizeof(MonoObject))));
 663                         } else
 664                                 printf ("this:[NULL], ");
 665                 } else {
 666                         if (obj) {
 667                                 class = obj->vtable->klass;
 668                                 if (class == mono_defaults.string_class) {
 669                                         printf ("this:[STRING:%p:%s], ",
 670                                                 obj, mono_string_to_utf8 ((MonoString *)obj));
 671                                 } else {
 672                                         printf ("this:%p[%s.%s], ",
 673                                                 obj, class->name_space, class->name);
 674                                 }
 675                         } else
 676                                 printf ("this:NULL, ");
 677                 }
 678                 oParm++;
 679         }
 680
 681         for (i = 0; i < sig->param_count; ++i) {
 682                 ainfo = cinfo->args + (i + oParm);
 683                 switch (ainfo->regtype) {
 684                         case RegTypeGeneral :
 685                                 decodeParm(sig->params[i], &(rParm->gr[ainfo->reg-2]), ainfo->size);
 686                                 break;
 687                         case RegTypeFP :
 688                                 decodeParm(sig->params[i], &(rParm->fp[ainfo->reg]), ainfo->size);
 689                                 break;
 690                         case RegTypeBase :
 691                                 decodeParm(sig->params[i], sp+ainfo->offset, ainfo->size);
 692                                 break;
 693                         case RegTypeStructByVal :
 694                                 if (ainfo->reg != STK_BASE)
 695                                         curParm = &(rParm->gr[ainfo->reg-2]);
 696                                 else
 697                                         curParm = sp+ainfo->offset;
 698
 699                                 switch (ainfo->vtsize) {
 700                                         case 0:
 701                                         case 1:
 702                                         case 2:
 703                                         case 4:
 704                                         case 8:
 705                                                 decodeParm(sig->params[i],
 706                                                    curParm,
 707                                                    ainfo->size);
 708                                                 break;
 709                                         default:
 710                                                 decodeParm(sig->params[i],
 711                                                    *((char **) curParm),
 712                                                    ainfo->vtsize);
 713                                         }
 714                                 break;
 715                         case RegTypeStructByAddr :
 716                                 if (ainfo->reg != STK_BASE)
 717                                         curParm = &(rParm->gr[ainfo->reg-2]);
 718                                 else
 719                                         curParm = sp+ainfo->offset;
 720
 721                                 decodeParm(sig->params[i],
 722                                            *((char **) curParm),
 723                                            ainfo->vtsize);
 724                                 break;
 725
 726                         default :
 727                                 printf("???, ");
 728                 }
 729         }
 730         printf("\n");
 731         g_free(cinfo);
 732 }
 733
 734 /*========================= End of Function ========================*/
 735
 736 /*------------------------------------------------------------------*/
 737 /*                                                                  */
 738 /* Name         - leave_method                                      */
 739 /*                                                                  */
 740 /* Function     -                                                   */
 741 /*                                                                  */
 742 /*------------------------------------------------------------------*/
 743
 744 static void
 745 leave_method (MonoMethod *method, ...)
 746 {
 747         MonoType *type;
 748         char *fname;
 749         guint32 ip;
 750         va_list ap;
 751
 752         va_start(ap, method);
 753
 754         fname = mono_method_full_name (method, TRUE);
 755         indent (-1);
 756         printf ("LEAVE: %s", fname);
 757         g_free (fname);
 758
 759         type = method->signature->ret;
 760
 761 handle_enum:
 762         switch (type->type) {
 763         case MONO_TYPE_VOID:
 764                 break;
 765         case MONO_TYPE_BOOLEAN: {
 766                 int val = va_arg (ap, int);
 767                 if (val)
 768                         printf ("[TRUE:%d]", val);
 769                 else
 770                         printf ("[FALSE]");
 771
 772                 break;
 773         }
 774         case MONO_TYPE_CHAR: {
 775                 int val = va_arg (ap, int);
 776                 printf ("[CHAR:%d]", val);
 777                 break;
 778         }
 779         case MONO_TYPE_I1: {
 780                 int val = va_arg (ap, int);
 781                 printf ("[INT1:%d]", val);
 782                 break;
 783         }
 784         case MONO_TYPE_U1: {
 785                 int val = va_arg (ap, int);
 786                 printf ("[UINT1:%d]", val);
 787                 break;
 788         }
 789         case MONO_TYPE_I2: {
 790                 int val = va_arg (ap, int);
 791                 printf ("[INT2:%d]", val);
 792                 break;
 793         }
 794         case MONO_TYPE_U2: {
 795                 int val = va_arg (ap, int);
 796                 printf ("[UINT2:%d]", val);
 797                 break;
 798         }
 799         case MONO_TYPE_I4: {
 800                 int val = va_arg (ap, int);
 801                 printf ("[INT4:%d]", val);
 802                 break;
 803         }
 804         case MONO_TYPE_U4: {
 805                 int val = va_arg (ap, int);
 806                 printf ("[UINT4:%d]", val);
 807                 break;
 808         }
 809         case MONO_TYPE_I: {
 810                 int *val = va_arg (ap, int*);
 811                 printf ("[INT:%d]", val);
 812                 printf("]");
 813                 break;
 814         }
 815         case MONO_TYPE_U: {
 816                 int *val = va_arg (ap, int*);
 817                 printf ("[UINT:%d]", val);
 818                 printf("]");
 819                 break;
 820         }
 821         case MONO_TYPE_STRING: {
 822                 MonoString *s = va_arg (ap, MonoString *);
 823 ;
 824                 if (s) {
 825                         g_assert (((MonoObject *)s)->vtable->klass == mono_defaults.string_class);
 826                         printf ("[STRING:%p:%s]", s, mono_string_to_utf8 (s));
 827                 } else
 828                         printf ("[STRING:null], ");
 829                 break;
 830         }
 831         case MONO_TYPE_CLASS:
 832         case MONO_TYPE_OBJECT: {
 833                 MonoObject *o = va_arg (ap, MonoObject *);
 834
 835                 if (o) {
 836                         if (o->vtable->klass == mono_defaults.boolean_class) {
 837                                 printf ("[BOOLEAN:%p:%d]", o, *((guint8 *)o + sizeof (MonoObject)));
 838                         } else if  (o->vtable->klass == mono_defaults.int32_class) {
 839                                 printf ("[INT32:%p:%d]", o, *((gint32 *)((char *)o + sizeof (MonoObject))));
 840                         } else if  (o->vtable->klass == mono_defaults.int64_class) {
 841                                 printf ("[INT64:%p:%lld]", o, *((gint64 *)((char *)o + sizeof (MonoObject))));
 842                         } else
 843                                 printf ("[%s.%s:%p]", o->vtable->klass->name_space, o->vtable->klass->name, o);
 844                 } else
 845                         printf ("[OBJECT:%p]", o);
 846
 847                 break;
 848         }
 849         case MONO_TYPE_PTR:
 850         case MONO_TYPE_FNPTR:
 851         case MONO_TYPE_ARRAY:
 852         case MONO_TYPE_SZARRAY: {
 853                 gpointer p = va_arg (ap, gpointer);
 854                 printf ("[result=%p]", p);
 855                 break;
 856         }
 857         case MONO_TYPE_I8: {
 858                 gint64 l =  va_arg (ap, gint64);
 859                 printf ("[LONG:%lld]", l);
 860                 break;
 861         }
 862         case MONO_TYPE_R4: {
 863                 double f = va_arg (ap, double);
 864                 printf ("[FLOAT4:%f]\n", (float) f);
 865                 break;
 866         }
 867         case MONO_TYPE_R8: {
 868                 double f = va_arg (ap, double);
 869                 printf ("[FLOAT8:%g]\n", f);
 870                 break;
 871         }
 872         case MONO_TYPE_VALUETYPE:
 873                 if (type->data.klass->enumtype) {
 874                         type = type->data.klass->enum_basetype;
 875                         goto handle_enum;
 876                 } else {
 877                         guint8 *p = va_arg (ap, gpointer);
 878                         int j, size, align;
 879                         size = mono_type_size (type, &align);
 880                         printf ("[");
 881                         for (j = 0; p && j < size; j++)
 882                                 printf ("%02x,", p [j]);
 883                         printf ("]");
 884                 }
 885                 break;
 886         default:
 887                 printf ("(unknown return type %x)",
 888                         method->signature->ret->type);
 889         }
 890
 891         ip = ((gint32) __builtin_return_address (0)) & 0x7fffffff;
 892         printf (" ip: %p\n", ip);
 893 }
 894
 895 /*========================= End of Function ========================*/
 896
 897 /*------------------------------------------------------------------*/
 898 /*                                                                  */
 899 /* Name         - mono_arch_cpu_init                                */
 900 /*                                                                  */
 901 /* Function     - Perform CPU specific initialization to execute    */
 902 /*                managed code.                                     */
 903 /*                                                                  */
 904 /*------------------------------------------------------------------*/
 905
 906 void
 907 mono_arch_cpu_init (void)
 908 {
 909         guint mode = 1;
 910
 911         /*--------------------------------------*/
 912         /* Set default rounding mode for FP     */
 913         /*--------------------------------------*/
 914         __asm__ ("SRNM\t%0\n\t"
 915                 : : "m" (mode));
 916 }
 917
 918 /*========================= End of Function ========================*/
 919
 920 /*------------------------------------------------------------------*/
 921 /*                                                                  */
 922 /* Name         - mono_arch_cpu_optimizazions                       */
 923 /*                                                                  */
 924 /* Function     - Returns the optimizations supported on this CPU   */
 925 /*                                                                  */
 926 /*------------------------------------------------------------------*/
 927
 928 guint32
 929 mono_arch_cpu_optimizazions (guint32 *exclude_mask)
 930 {
 931         guint32 opts = 0;
 932
 933         /* no s390-specific optimizations yet */
 934         *exclude_mask = MONO_OPT_INLINE|MONO_OPT_LINEARS;
 935         return opts;
 936 }
 937
 938 /*========================= End of Function ========================*/
 939
 940 /*------------------------------------------------------------------*/
 941 /*                                                                  */
 942 /* Name         -                                                   */
 943 /*                                                                  */
 944 /* Function     -                                                   */
 945 /*                                                                  */
 946 /*------------------------------------------------------------------*/
 947
 948 static gboolean
 949 is_regsize_var (MonoType *t) {
 950         if (t->byref)
 951                 return TRUE;
 952         switch (t->type) {
 953         case MONO_TYPE_I4:
 954         case MONO_TYPE_U4:
 955         case MONO_TYPE_I:
 956         case MONO_TYPE_U:
 957                 return TRUE;
 958         case MONO_TYPE_OBJECT:
 959         case MONO_TYPE_STRING:
 960         case MONO_TYPE_CLASS:
 961         case MONO_TYPE_SZARRAY:
 962         case MONO_TYPE_ARRAY:
 963                 return FALSE;
 964         case MONO_TYPE_VALUETYPE:
 965                 if (t->data.klass->enumtype)
 966                         return is_regsize_var (t->data.klass->enum_basetype);
 967                 return FALSE;
 968         }
 969         return FALSE;
 970 }
 971
 972 /*========================= End of Function ========================*/
 973
 974 /*------------------------------------------------------------------*/
 975 /*                                                                  */
 976 /* Name         - mono_arch_get_allocatable_int_vars                */
 977 /*                                                                  */
 978 /* Function     -                                                   */
 979 /*                                                                  */
 980 /*------------------------------------------------------------------*/
 981
 982 GList *
 983 mono_arch_get_allocatable_int_vars (MonoCompile *cfg)
 984 {
 985         GList *vars = NULL;
 986         int i;
 987
 988         for (i = 0; i < cfg->num_varinfo; i++) {
 989                 MonoInst *ins = cfg->varinfo [i];
 990                 MonoMethodVar *vmv = MONO_VARINFO (cfg, i);
 991
 992                 /* unused vars */
 993                 if (vmv->range.first_use.abs_pos > vmv->range.last_use.abs_pos)
 994                         continue;
 995
 996                 if (ins->flags & (MONO_INST_VOLATILE|MONO_INST_INDIRECT) || (ins->opcode != OP_LOCAL && ins->opcode != OP_ARG))
 997                         continue;
 998
 999                 /* we can only allocate 32 bit values */
1000                 if (is_regsize_var (ins->inst_vtype)) {
1001                         g_assert (MONO_VARINFO (cfg, i)->reg == -1);
1002                         g_assert (i == vmv->idx);
1003                         vars = mono_varlist_insert_sorted (cfg, vars, vmv, FALSE);
1004                 }
1005         }
1006
1007         return vars;
1008 }
1009
1010 /*========================= End of Function ========================*/
1011
1012 /*------------------------------------------------------------------*/
1013 /*                                                                  */
1014 /* Name         - mono_arch_global_int_regs                         */
1015 /*                                                                  */
1016 /* Function     - Return a list of usable integer registers.        */
1017 /*                                                                  */
1018 /*------------------------------------------------------------------*/
1019
1020 GList *
1021 mono_arch_get_global_int_regs (MonoCompile *cfg)
1022 {
1023         GList *regs = NULL;
1024         int i, top = 12;
1025
1026         for (i = 3; i < top; ++i)
1027                 regs = g_list_prepend (regs, GUINT_TO_POINTER (i));
1028
1029         return regs;
1030 }
1031
1032 /*========================= End of Function ========================*/
1033
1034 /*------------------------------------------------------------------*/
1035 /*                                                                  */
1036 /* Name         -  mono_arch_flush_icache                           */
1037 /*                                                                  */
1038 /* Function     -  Flush the CPU icache.                            */
1039 /*                                                                  */
1040 /*------------------------------------------------------------------*/
1041
1042 void
1043 mono_arch_flush_icache (guint8 *code, gint size)
1044 {
1045 }
1046
1047 /*========================= End of Function ========================*/
1048
1049 /*------------------------------------------------------------------*/
1050 /*                                                                  */
1051 /* Name         - add_general                                       */
1052 /*                                                                  */
1053 /* Function     - Determine code and stack size incremements for a  */
1054 /*                parameter.                                        */
1055 /*                                                                  */
1056 /*------------------------------------------------------------------*/
1057
1058 static void inline
1059 add_general (guint *gr, size_data *sz, ArgInfo *ainfo, gboolean simple)
1060 {
1061         if (simple) {
1062                 if (*gr > S390_LAST_ARG_REG) {
1063                         sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1064                         ainfo->offset   = sz->stack_size;
1065                         ainfo->reg      = STK_BASE;
1066                         ainfo->regtype  = RegTypeBase;
1067                         sz->stack_size += sizeof(int);
1068                         sz->code_size  += 12;
1069                 } else {
1070                         ainfo->reg      = *gr;
1071                         sz->code_size  += 8;
1072                 }
1073         } else {
1074                 if (*gr > S390_LAST_ARG_REG - 1) {
1075                         sz->stack_size  = S390_ALIGN(sz->stack_size, S390_STACK_ALIGNMENT);
1076                         ainfo->offset   = sz->stack_size;
1077                         ainfo->reg      = STK_BASE;
1078                         ainfo->regtype  = RegTypeBase;
1079                         sz->stack_size += sizeof(long long);
1080                         sz->code_size  += 10;
1081                 } else {
1082                         ainfo->reg      = *gr;
1083                         sz->code_size  += 8;
1084                 }
1085                 (*gr) ++;
1086         }
1087         (*gr) ++;
1088 }
1089
1090 /*========================= End of Function ========================*/
1091
1092 /*------------------------------------------------------------------*/
1093 /*                                                                  */
1094 /* Name         - calculate_sizes                                   */
1095 /*                                                                  */
1096 /* Function     - Determine the amount of space required for code   */
1097 /*                and stack. In addition determine starting points  */
1098 /*                for stack-based parameters, and area for struct-  */
1099 /*                ures being returned on the stack.                 */
1100 /*                                                                  */
1101 /*------------------------------------------------------------------*/
1102
1103 static CallInfo *
1104 calculate_sizes (MonoMethodSignature *sig, size_data *sz,
1105                  gboolean string_ctor)
1106 {
1107         guint i, fr, gr, size, nWords;
1108         int nParm = sig->hasthis + sig->param_count;
1109         guint32 simpletype, align;
1110         CallInfo *cinfo = g_malloc0 (sizeof (CallInfo) + sizeof (ArgInfo) * nParm);
1111
1112         fr                = 0;
1113         gr                = s390_r2;
1114         nParm             = 0;
1115         cinfo->struct_ret = 0;
1116         sz->retStruct     = 0;
1117         sz->stack_size    = S390_MINIMAL_STACK_SIZE;
1118         sz->code_size     = 0;
1119         sz->local_size    = 0;
1120
1121         /*----------------------------------------------------------*/
1122         /* We determine the size of the return code/stack in case we*/
1123         /* need to reserve a register to be used to address a stack */
1124         /* area that the callee will use.                           */
1125         /*----------------------------------------------------------*/
1126
1127 //      if (sig->ret->byref || string_ctor) {
1128 //              sz->code_size += 8;
1129 //              add_general (&gr, sz, cinfo->args+nParm, TRUE);
1130 //              cinfo->args[nParm].size = sizeof(gpointer);
1131 //              nParm++;
1132 //      } else {
1133         {
1134                 simpletype = sig->ret->type;
1135 enum_retvalue:
1136                 switch (simpletype) {
1137                 case MONO_TYPE_BOOLEAN:
1138                 case MONO_TYPE_I1:
1139                 case MONO_TYPE_U1:
1140                 case MONO_TYPE_I2:
1141                 case MONO_TYPE_U2:
1142                 case MONO_TYPE_CHAR:
1143                 case MONO_TYPE_I4:
1144                 case MONO_TYPE_U4:
1145                 case MONO_TYPE_I:
1146                 case MONO_TYPE_U:
1147                 case MONO_TYPE_CLASS:
1148                 case MONO_TYPE_OBJECT:
1149                 case MONO_TYPE_SZARRAY:
1150                 case MONO_TYPE_ARRAY:
1151                 case MONO_TYPE_PTR:
1152                 case MONO_TYPE_STRING:
1153                         cinfo->ret.reg = s390_r2;
1154                         sz->code_size += 4;
1155                         break;
1156                 case MONO_TYPE_R4:
1157                 case MONO_TYPE_R8:
1158                         cinfo->ret.reg = s390_f0;
1159                         sz->code_size += 4;
1160                         break;
1161                 case MONO_TYPE_I8:
1162                 case MONO_TYPE_U8:
1163                         cinfo->ret.reg = s390_r2;
1164                         sz->code_size += 4;
1165                         break;
1166                 case MONO_TYPE_VALUETYPE:
1167                         if (sig->ret->data.klass->enumtype) {
1168                                 simpletype = sig->ret->data.klass->enum_basetype->type;
1169                                 goto enum_retvalue;
1170                         }
1171                         if (sig->pinvoke)
1172                                 size = mono_class_native_size (sig->ret->data.klass, &align);
1173                         else
1174                                 size = mono_class_value_size (sig->ret->data.klass, &align);
1175                         cinfo->ret.reg    = s390_r2;
1176                         cinfo->struct_ret = 1;
1177                         cinfo->ret.size   = size;
1178                         cinfo->ret.vtsize = size;
1179                         cinfo->ret.offset = sz->stack_size;
1180                         sz->stack_size   += S390_ALIGN(size, align);
1181                         gr++;
1182                         break;
1183                 case MONO_TYPE_TYPEDBYREF:
1184                 case MONO_TYPE_VOID:
1185                         break;
1186                 default:
1187                         g_error ("Can't handle as return value 0x%x", sig->ret->type);
1188                 }
1189         }
1190
1191         if (sig->hasthis) {
1192                 add_general (&gr, sz, cinfo->args+nParm, TRUE);
1193                 cinfo->args[nParm].size = sizeof(gpointer);
1194                 nParm++;
1195         }
1196
1197         /*----------------------------------------------------------*/
1198         /* We determine the size of the parameter code and stack    */
1199         /* requirements by checking the types and sizes of the      */
1200         /* parameters.                                              */
1201         /*----------------------------------------------------------*/
1202
1203         for (i = 0; i < sig->param_count; ++i) {
1204                 if (sig->params [i]->byref) {
1205                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1206                         cinfo->args[nParm].size = sizeof(gpointer);
1207                         nParm++;
1208                         continue;
1209                 }
1210                 simpletype = sig->params [i]->type;
1211         enum_calc_size:
1212                 switch (simpletype) {
1213                 case MONO_TYPE_BOOLEAN:
1214                 case MONO_TYPE_I1:
1215                 case MONO_TYPE_U1:
1216                         cinfo->args[nParm].size = sizeof(char);
1217                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1218                         nParm++;
1219                         break;
1220                 case MONO_TYPE_I2:
1221                 case MONO_TYPE_U2:
1222                 case MONO_TYPE_CHAR:
1223                         cinfo->args[nParm].size = sizeof(short);
1224                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1225                         nParm++;
1226                         break;
1227                 case MONO_TYPE_I4:
1228                 case MONO_TYPE_U4:
1229                         cinfo->args[nParm].size = sizeof(int);
1230                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1231                         nParm++;
1232                         break;
1233                 case MONO_TYPE_I:
1234                 case MONO_TYPE_U:
1235                 case MONO_TYPE_PTR:
1236                 case MONO_TYPE_CLASS:
1237                 case MONO_TYPE_OBJECT:
1238                 case MONO_TYPE_STRING:
1239                 case MONO_TYPE_SZARRAY:
1240                 case MONO_TYPE_ARRAY:
1241                         cinfo->args[nParm].size = sizeof(gpointer);
1242                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1243                         nParm++;
1244                         break;
1245                 case MONO_TYPE_VALUETYPE:
1246                         if (sig->params [i]->data.klass->enumtype) {
1247                                 simpletype = sig->params [i]->data.klass->enum_basetype->type;
1248                                 goto enum_calc_size;
1249                         }
1250                         if (sig->pinvoke)
1251                                 size = mono_class_native_size (sig->params [i]->data.klass, &align);
1252                         else
1253                                 size = mono_class_value_size (sig->params [i]->data.klass, &align);
1254                         nWords = (size + sizeof(gpointer) - 1) /
1255                                  sizeof(gpointer);
1256
1257                         cinfo->args[nParm].vtsize  = 0;
1258                         cinfo->args[nParm].size    = 0;
1259                         cinfo->args[nParm].offparm = sz->local_size;
1260
1261                         switch (size) {
1262                                 /*----------------------------------*/
1263                                 /* On S/390, structures of size 1,  */
1264                                 /* 2, 4, and 8 bytes are passed in  */
1265                                 /* (a) register(s).                 */
1266                                 /*----------------------------------*/
1267                                 case 0:
1268                                 case 1:
1269                                 case 2:
1270                                 case 4:
1271                                         add_general(&gr, sz, cinfo->args+nParm, TRUE);
1272                                         cinfo->args[nParm].size    = size;
1273                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1274                                         nParm++;
1275                                         sz->local_size            += sizeof(long);
1276                                         break;
1277                                 case 8:
1278                                         add_general(&gr, sz, cinfo->args+nParm, FALSE);
1279                                         cinfo->args[nParm].size    = sizeof(long long);
1280                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1281                                         nParm++;
1282                                         sz->local_size            += sizeof(long);
1283                                         break;
1284                                 default:
1285                                         add_general(&gr, sz, cinfo->args+nParm, TRUE);
1286                                         cinfo->args[nParm].size    = sizeof(int);
1287                                         cinfo->args[nParm].regtype = RegTypeStructByAddr;
1288                                         cinfo->args[nParm].vtsize  = size;
1289                                         sz->code_size             += 40;
1290                                         sz->local_size            += size;
1291                                         if (cinfo->args[nParm].reg == STK_BASE)
1292                                                 sz->local_size += sizeof(gpointer);
1293                                         nParm++;
1294                         }
1295                         break;
1296                 case MONO_TYPE_I8:
1297                 case MONO_TYPE_U8:
1298                         cinfo->args[nParm].size = sizeof(long long);
1299                         add_general (&gr, sz, cinfo->args+nParm, FALSE);
1300                         nParm++;
1301                         break;
1302                 case MONO_TYPE_R4:
1303                         cinfo->args[nParm].size = sizeof(float);
1304                         if (fr <= S390_LAST_FPARG_REG) {
1305                                 cinfo->args[nParm].regtype = RegTypeFP;
1306                                 cinfo->args[nParm].reg     = fr;
1307                                 sz->code_size += 4;
1308                                 fr += 2;
1309                         }
1310                         else {
1311                                 cinfo->args[nParm].offset  = sz->stack_size;
1312                                 cinfo->args[nParm].reg     = STK_BASE;
1313                                 cinfo->args[nParm].regtype = RegTypeBase;
1314                                 sz->code_size  += 4;
1315                                 sz->stack_size += sizeof(float);
1316                         }
1317                         nParm++;
1318                         break;
1319                 case MONO_TYPE_R8:
1320                         cinfo->args[nParm].size = sizeof(double);
1321                         if (fr <= S390_LAST_FPARG_REG) {
1322                                 cinfo->args[nParm].regtype = RegTypeFP;
1323                                 cinfo->args[nParm].reg     = fr;
1324                                 sz->code_size += 4;
1325                                 fr += 2;
1326                         } else {
1327                                 cinfo->args[nParm].offset  = sz->stack_size;
1328                                 cinfo->args[nParm].reg     = STK_BASE;
1329                                 cinfo->args[nParm].regtype = RegTypeBase;
1330                                 sz->code_size  += 4;
1331                                 sz->stack_size += sizeof(double);
1332                         }
1333                         nParm++;
1334                         break;
1335                 default:
1336                         g_error ("Can't trampoline 0x%x", sig->params [i]->type);
1337                 }
1338         }
1339
1340         cinfo->stack_usage = S390_ALIGN(sz->stack_size+sz->local_size,
1341                                         S390_STACK_ALIGNMENT);
1342         return (cinfo);
1343 }
1344
1345 /*========================= End of Function ========================*/
1346
1347 /*------------------------------------------------------------------*/
1348 /*                                                                  */
1349 /* Name         - mono_arch_allocate_vars                           */
1350 /*                                                                  */
1351 /* Function     - Set var information according to the calling      */
1352 /*                convention for S/390. The local var stuff should  */
1353 /*                most likely be split in another method.           */
1354 /*                                                                  */
1355 /* Parameter    - @m - Compile unit.                                */
1356 /*                                                                  */
1357 /*------------------------------------------------------------------*/
1358
1359 void
1360 mono_arch_allocate_vars (MonoCompile *m)
1361 {
1362         MonoMethodSignature *sig;
1363         MonoMethodHeader *header;
1364         MonoInst *inst;
1365         CallInfo *cinfo;
1366         size_data sz;
1367         int iParm, iVar, offset, size, align, curinst;
1368         int frame_reg = STK_BASE;
1369         int sArg, eArg;
1370
1371         header  = mono_method_get_header (m->method);
1372
1373         /*---------------------------------------------------------*/
1374         /* We use the frame register also for any method that has  */
1375         /* filter clauses. This way, when the handlers are called, */
1376         /* the code will reference local variables using the frame */
1377         /* reg instead of the stack pointer: if we had to restore  */
1378         /* the stack pointer, we'd corrupt the method frames that  */
1379         /* are already on the stack (since filters get called      */
1380         /* before stack unwinding happens) when the filter code    */
1381         /* would call any method.                                  */
1382         /*---------------------------------------------------------*/
1383         if ((m->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
1384                 frame_reg = s390_r11;
1385
1386         m->frame_reg = frame_reg;
1387
1388         if (frame_reg != STK_BASE)
1389                 m->used_int_regs |= 1 << frame_reg;
1390
1391         sig     = m->method->signature;
1392
1393         cinfo   = calculate_sizes (sig, &sz, sig->pinvoke);
1394
1395         if (cinfo->struct_ret) {
1396                 m->ret->opcode = OP_REGVAR;
1397                 m->ret->inst_c0 = s390_r2;
1398         } else {
1399                 /* FIXME: handle long and FP values */
1400                 switch (sig->ret->type) {
1401                 case MONO_TYPE_VOID:
1402                         break;
1403                 default:
1404                         m->ret->opcode = OP_REGVAR;
1405                         m->ret->dreg    = s390_r2;
1406                         break;
1407                 }
1408         }
1409
1410         /*--------------------------------------------------------------*/
1411         /* local vars are at a positive offset from the stack pointer   */
1412         /*                                                              */
1413         /* also note that if the function uses alloca, we use s390_r11  */
1414         /* to point at the local variables.                             */
1415         /* add parameter area size for called functions                 */
1416         /*--------------------------------------------------------------*/
1417         offset = (m->param_area + S390_MINIMAL_STACK_SIZE);
1418
1419         if (cinfo->struct_ret) {
1420                 inst               = m->ret;
1421                 offset             = S390_ALIGN(offset, sizeof(gpointer));
1422                 inst->inst_offset  = offset;
1423                 inst->opcode       = OP_REGOFFSET;
1424                 inst->inst_basereg = frame_reg;
1425                 offset            += sizeof(gpointer);
1426         }
1427
1428         if (sig->hasthis) {
1429                 inst = m->varinfo [0];
1430                 if (inst->opcode != OP_REGVAR) {
1431                         inst->opcode       = OP_REGOFFSET;
1432                         inst->inst_basereg = frame_reg;
1433                         offset             = S390_ALIGN(offset, sizeof(gpointer));
1434                         inst->inst_offset  = offset;
1435                         offset            += sizeof (gpointer);
1436                 }
1437                 curinst = sArg = 1;
1438         } else {
1439                 curinst = sArg = 0;
1440         }
1441
1442         eArg = sig->param_count + sArg;
1443
1444         for (iParm = sArg; iParm < eArg; ++iParm) {
1445                 inst = m->varinfo [curinst];
1446                 if (inst->opcode != OP_REGVAR) {
1447                         switch (cinfo->args[iParm].regtype) {
1448                                 case RegTypeStructByAddr :
1449                                         inst->opcode       = OP_S390_LOADARG;
1450                                         inst->inst_basereg = frame_reg;
1451                                         size               = abs(cinfo->args[iParm].vtsize);
1452                                         offset             = S390_ALIGN(offset, size);
1453                                         inst->inst_offset  = offset;
1454                                         break;
1455                                 case RegTypeStructByVal :
1456                                         inst->opcode       = OP_S390_ARGPTR;
1457                                         inst->inst_basereg = frame_reg;
1458                                         size               = cinfo->args[iParm].size;
1459                                         offset             = S390_ALIGN(offset, size);
1460                                         inst->inst_offset  = offset;
1461                                         break;
1462                                 default :
1463                                 if (cinfo->args[iParm].reg != STK_BASE) {
1464                                         inst->opcode       = OP_REGOFFSET;
1465                                         inst->inst_basereg = frame_reg;
1466                                         size               = (cinfo->args[iParm].size < 8
1467                                                               ? sizeof(long)
1468                                                               : sizeof(long long));
1469                                         offset             = S390_ALIGN(offset, size);
1470                                         inst->inst_offset  = offset;
1471                                 } else {
1472                                         inst->opcode       = OP_S390_STKARG;
1473                                         inst->inst_basereg = frame_reg;
1474                                         size               = (cinfo->args[iParm].size < 4
1475                                                               ? 4 - cinfo->args[iParm].size
1476                                                               : 0);
1477                                         inst->inst_offset  = cinfo->args[iParm].offset +
1478                                                              size;
1479                                         inst->unused       = 0;
1480                                         size               = sizeof(long);
1481                                 }
1482                         }
1483                         offset += size;
1484                 }
1485                 curinst++;
1486         }
1487
1488         curinst = m->locals_start;
1489         for (iVar = curinst; iVar < m->num_varinfo; ++iVar) {
1490                 inst = m->varinfo [iVar];
1491                 if (inst->opcode == OP_REGVAR)
1492                         continue;
1493
1494                 /*--------------------------------------------------*/
1495                 /* inst->unused indicates native sized value types, */
1496                 /* this is used by the pinvoke wrappers when they   */
1497                 /* call functions returning structure               */
1498                 /*--------------------------------------------------*/
1499                 if (inst->unused && MONO_TYPE_ISSTRUCT (inst->inst_vtype))
1500                         size = mono_class_native_size (inst->inst_vtype->data.klass, &align);
1501                 else
1502                         size = mono_type_size (inst->inst_vtype, &align);
1503
1504                 offset             = S390_ALIGN(offset, align);
1505                 inst->inst_offset  = offset;
1506                 inst->opcode       = OP_REGOFFSET;
1507                 inst->inst_basereg = frame_reg;
1508                 offset            += size;
1509                 //DEBUG (g_print("allocating local %d to %d\n", iVar, inst->inst_offset));
1510         }
1511
1512         /*------------------------------------------------------*/
1513         /* Allow space for the trace method stack area if needed*/
1514         /*------------------------------------------------------*/
1515         if (mono_jit_trace_calls != NULL && mono_trace_eval (m))
1516                 offset += S390_TRACE_STACK_SIZE;
1517
1518         /*------------------------------------------------------*/
1519         /* Reserve space to save LMF and caller saved registers */
1520         /*------------------------------------------------------*/
1521         if (m->method->save_lmf)
1522                 offset += sizeof (MonoLMF);
1523
1524         /*------------------------------------------------------*/
1525         /* align the offset                                     */
1526         /*------------------------------------------------------*/
1527         m->stack_offset = S390_ALIGN(offset, S390_STACK_ALIGNMENT);
1528
1529 }
1530
1531 /*========================= End of Function ========================*/
1532
1533 /*------------------------------------------------------------------*/
1534 /*                                                                  */
1535 /* Name         - mono_arch_call_opcode                             */
1536 /*                                                                  */
1537 /* Function     - Take the arguments and generate the arch-specific */
1538 /*                instructions to properly call the function. This  */
1539 /*                includes pushing, moving argments to the correct  */
1540 /*                etc.                                              */
1541 /*                                                                  */
1542 /* Note         - FIXME: We need an alignment solution for          */
1543 /*                enter_method and mono_arch_call_opcode, currently */
1544 /*                alignment in mono_arch_call_opcode is computed    */
1545 /*                without arch_get_argument_info.                   */
1546 /*                                                                  */
1547 /*------------------------------------------------------------------*/
1548
1549 MonoCallInst*
1550 mono_arch_call_opcode (MonoCompile *cfg, MonoBasicBlock* bb,
1551                        MonoCallInst *call, int is_virtual) {
1552         MonoInst *arg, *in;
1553         MonoMethodSignature *sig;
1554         int i, n, lParamArea;
1555         CallInfo *cinfo;
1556         ArgInfo *ainfo;
1557         size_data sz;
1558
1559         sig = call->signature;
1560         n = sig->param_count + sig->hasthis;
1561         DEBUG (g_print ("Call requires: %d parameters\n",n));
1562
1563         cinfo = calculate_sizes (sig, &sz, sig->pinvoke);
1564
1565         call->stack_usage = cinfo->stack_usage;
1566         lParamArea        = cinfo->stack_usage - S390_MINIMAL_STACK_SIZE;
1567         cfg->param_area   = MAX (cfg->param_area, lParamArea);
1568         cfg->flags       |= MONO_CFG_HAS_CALLS;
1569
1570         if (cinfo->struct_ret)
1571                 call->used_iregs |= 1 << cinfo->struct_ret;
1572
1573         for (i = 0; i < n; ++i) {
1574                 ainfo = cinfo->args + i;
1575                 DEBUG (g_print ("Parameter %d - Register: %d Type: %d\n",
1576                                 i+1,ainfo->reg,ainfo->regtype));
1577                 if (is_virtual && i == 0) {
1578                         /* the argument will be attached to the call instrucion */
1579                         in = call->args [i];
1580                         call->used_iregs |= 1 << ainfo->reg;
1581                 } else {
1582                         MONO_INST_NEW (cfg, arg, OP_OUTARG);
1583                         in = call->args [i];
1584                         arg->cil_code  = in->cil_code;
1585                         arg->inst_left = in;
1586                         arg->type      = in->type;
1587                         /* prepend, we'll need to reverse them later */
1588                         arg->next      = call->out_args;
1589                         call->out_args = arg;
1590                         if (ainfo->regtype == RegTypeGeneral) {
1591                                 arg->unused = ainfo->reg;
1592                                 call->used_iregs |= 1 << ainfo->reg;
1593                                 if (arg->type == STACK_I8)
1594                                         call->used_iregs |= 1 << (ainfo->reg + 1);
1595                         } else if (ainfo->regtype == RegTypeStructByAddr) {
1596                                 call->used_iregs |= 1 << ainfo->reg;
1597                                 arg->sreg1     = ainfo->reg;
1598                                 arg->opcode    = OP_OUTARG_VT;
1599                                 arg->unused    = -ainfo->vtsize;
1600                                 arg->inst_imm  = ainfo->offset;
1601                                 arg->sreg2     = ainfo->offparm + S390_MINIMAL_STACK_SIZE;
1602                         } else if (ainfo->regtype == RegTypeStructByVal) {
1603                                 if (ainfo->reg != STK_BASE) {
1604                                         switch (ainfo->size) {
1605                                         case 0:
1606                                         case 1:
1607                                         case 2:
1608                                         case 4:
1609                                                 call->used_iregs |= 1 << ainfo->reg;
1610                                                 break;
1611                                         case 8:
1612                                                 call->used_iregs |= 1 << ainfo->reg;
1613                                                 call->used_iregs |= 1 << (ainfo->reg+1);
1614                                                 break;
1615                                         default:
1616                                                 call->used_iregs |= 1 << ainfo->reg;
1617                                         }
1618                                 }
1619                                 arg->sreg1     = ainfo->reg;
1620                                 arg->opcode    = OP_OUTARG_VT;
1621                                 arg->unused    = ainfo->size;
1622                                 arg->inst_imm  = ainfo->offset;
1623                                 arg->sreg2     = ainfo->offparm + S390_MINIMAL_STACK_SIZE;
1624                         } else if (ainfo->regtype == RegTypeBase) {
1625                                 arg->opcode = OP_OUTARG;
1626                                 arg->unused = ainfo->reg | (ainfo->size << 8);
1627                                 arg->inst_imm = ainfo->offset;
1628                                 call->used_fregs |= 1 << ainfo->reg;
1629                         } else if (ainfo->regtype == RegTypeFP) {
1630                                 arg->unused = ainfo->reg;
1631                                 call->used_fregs |= 1 << ainfo->reg;
1632                                 if (ainfo->size == 4) {
1633                                         MonoInst *conv;
1634                                         arg->opcode     = OP_OUTARG_R4;
1635                                         MONO_INST_NEW (cfg, conv, OP_FCONV_TO_R4);
1636                                         conv->inst_left = arg->inst_left;
1637                                         arg->inst_left  = conv;
1638                                 }
1639                                 else
1640                                         arg->opcode = OP_OUTARG_R8;
1641                         } else {
1642                                 g_assert_not_reached ();
1643                         }
1644                 }
1645         }
1646         /*
1647          * Reverse the call->out_args list.
1648          */
1649         {
1650                 MonoInst *prev = NULL, *list = call->out_args, *next;
1651                 while (list) {
1652                         next = list->next;
1653                         list->next = prev;
1654                         prev = list;
1655                         list = next;
1656                 }
1657                 call->out_args = prev;
1658         }
1659
1660         g_free (cinfo);
1661         return call;
1662 }
1663
1664 /*========================= End of Function ========================*/
1665
1666 /*------------------------------------------------------------------*/
1667 /*                                                                  */
1668 /* Name         - mono_arch_instrument_mem_needs                    */
1669 /*                                                                  */
1670 /* Function     - Allow tracing to work with this interface (with   */
1671 /*                an optional argument).                            */
1672 /*                                                                  */
1673 /*------------------------------------------------------------------*/
1674
1675 void
1676 mono_arch_instrument_mem_needs (MonoMethod *method, int *stack, int *code)
1677 {
1678         /* no stack room needed now (may be needed for FASTCALL-trace support) */
1679         *stack = 0;
1680         /* split prolog-epilog requirements? */
1681         *code = 50; /* max bytes needed: check this number */
1682 }
1683
1684 /*========================= End of Function ========================*/
1685
1686 /*------------------------------------------------------------------*/
1687 /*                                                                  */
1688 /* Name         - mono_arch_instrument_prolog                       */
1689 /*                                                                  */
1690 /* Function     - Create an "instrumented" prolog.                  */
1691 /*                                                                  */
1692 /*------------------------------------------------------------------*/
1693
1694 void*
1695 mono_arch_instrument_prolog (MonoCompile *cfg, void *func, void *p,
1696                              gboolean enable_arguments)
1697 {
1698         guchar *code = p;
1699         int     parmOffset,
1700                 fpOffset;
1701
1702         parmOffset = cfg->stack_usage - S390_TRACE_STACK_SIZE;
1703         if (cfg->method->save_lmf)
1704                 parmOffset -= sizeof(MonoLMF);
1705         fpOffset   = parmOffset + (5*sizeof(gint32));
1706
1707         s390_stm  (code, s390_r2, s390_r6, STK_BASE, parmOffset);
1708         s390_std  (code, s390_f0, 0, STK_BASE, fpOffset);
1709         s390_std  (code, s390_f1, 0, STK_BASE, fpOffset+sizeof(gdouble));
1710         s390_std  (code, s390_f2, 0, STK_BASE, fpOffset+2*sizeof(gdouble));
1711         s390_basr (code, s390_r13, 0);
1712         s390_j    (code, 6);
1713         s390_word (code, cfg->method);
1714         s390_word (code, func);
1715         s390_l    (code, s390_r2, 0, s390_r13, 4);
1716         s390_la   (code, s390_r3, 0, STK_BASE, parmOffset);
1717         s390_lr   (code, s390_r4, STK_BASE);
1718         s390_ahi  (code, s390_r4, cfg->stack_usage);
1719         s390_l    (code, s390_r1, 0, s390_r13, 8);
1720         s390_basr (code, s390_r14, s390_r1);
1721         s390_ld   (code, s390_f2, 0, STK_BASE, fpOffset+2*sizeof(gdouble));
1722         s390_ld   (code, s390_f1, 0, STK_BASE, fpOffset+sizeof(gdouble));
1723         s390_ld   (code, s390_f0, 0, STK_BASE, fpOffset);
1724         s390_lm   (code, s390_r2, s390_r6, STK_BASE, parmOffset);
1725
1726         return code;
1727 }
1728
1729 /*========================= End of Function ========================*/
1730
1731 /*------------------------------------------------------------------*/
1732 /*                                                                  */
1733 /* Name         - mono_arch_instrument_epilog                       */
1734 /*                                                                  */
1735 /* Function     - Create an epilog that will handle the returned    */
1736 /*                values used in instrumentation.                   */
1737 /*                                                                  */
1738 /*------------------------------------------------------------------*/
1739
1740 void*
1741 mono_arch_instrument_epilog (MonoCompile *cfg, void *func, void *p, gboolean enable_arguments)
1742 {
1743         guchar     *code = p;
1744         int        save_mode = SAVE_NONE,
1745                    saveOffset;
1746         MonoMethod *method = cfg->method;
1747         int        rtype = method->signature->ret->type;
1748
1749         saveOffset = cfg->stack_usage - S390_TRACE_STACK_SIZE;
1750         if (method->save_lmf)
1751                 saveOffset -= sizeof(MonoLMF);
1752
1753 handle_enum:
1754         switch (rtype) {
1755         case MONO_TYPE_VOID:
1756                 /* special case string .ctor icall */
1757                 if (strcmp (".ctor", method->name) && method->klass == mono_defaults.string_class)
1758                         save_mode = SAVE_ONE;
1759                 else
1760                         save_mode = SAVE_NONE;
1761                 break;
1762         case MONO_TYPE_I8:
1763         case MONO_TYPE_U8:
1764                 save_mode = SAVE_TWO;
1765                 break;
1766         case MONO_TYPE_R4:
1767         case MONO_TYPE_R8:
1768                 save_mode = SAVE_FP;
1769                 break;
1770         case MONO_TYPE_VALUETYPE:
1771                 if (method->signature->ret->data.klass->enumtype) {
1772                         rtype = method->signature->ret->data.klass->enum_basetype->type;
1773                         goto handle_enum;
1774                 }
1775                 save_mode = SAVE_STRUCT;
1776                 break;
1777         default:
1778                 save_mode = SAVE_ONE;
1779                 break;
1780         }
1781
1782         switch (save_mode) {
1783         case SAVE_TWO:
1784                 s390_stm (code, s390_r2, s390_r3, cfg->frame_reg, saveOffset);
1785                 if (enable_arguments) {
1786                         s390_lr (code, s390_r4, s390_r3);
1787                         s390_lr (code, s390_r3, s390_r2);
1788                 }
1789                 break;
1790         case SAVE_ONE:
1791                 s390_st (code, s390_r2, 0, cfg->frame_reg, saveOffset);
1792                 if (enable_arguments) {
1793                         s390_lr (code, s390_r3, s390_r2);
1794                 }
1795                 break;
1796         case SAVE_FP:
1797                 s390_std (code, s390_f0, 0, cfg->frame_reg, saveOffset);
1798                 if (enable_arguments) {
1799                         /* FIXME: what reg?  */
1800                         s390_ldr (code, s390_f2, s390_f0);
1801                         s390_lm  (code, s390_r3, s390_r4, cfg->frame_reg, saveOffset);
1802                 }
1803                 break;
1804         case SAVE_STRUCT:
1805                 s390_st (code, s390_r2, 0, cfg->frame_reg, saveOffset);
1806                 if (enable_arguments) {
1807                         s390_l (code, s390_r3, 0, cfg->frame_reg,
1808                                 S390_MINIMAL_STACK_SIZE+cfg->param_area);
1809                 }
1810                 break;
1811         case SAVE_NONE:
1812         default:
1813                 break;
1814         }
1815
1816         s390_basr (code, s390_r13, 0);
1817         s390_j    (code, 6);
1818         s390_word (code, cfg->method);
1819         s390_word (code, func);
1820         s390_l    (code, s390_r2, 0, s390_r13, 4);
1821         s390_l    (code, s390_r1, 0, s390_r13, 8);
1822         s390_basr (code, s390_r14, s390_r1);
1823
1824         switch (save_mode) {
1825         case SAVE_TWO:
1826                 s390_lm  (code, s390_r2, s390_r3, cfg->frame_reg, saveOffset);
1827                 break;
1828         case SAVE_ONE:
1829                 s390_l   (code, s390_r2, 0, cfg->frame_reg, saveOffset);
1830                 break;
1831         case SAVE_FP:
1832                 s390_ld  (code, s390_f0, 0, cfg->frame_reg, saveOffset);
1833                 break;
1834         case SAVE_STRUCT:
1835                 s390_l   (code, s390_r2, 0, cfg->frame_reg, saveOffset);
1836                 break;
1837         case SAVE_NONE:
1838         default:
1839                 break;
1840         }
1841
1842         return code;
1843 }
1844
1845 /*========================= End of Function ========================*/
1846
1847 /*------------------------------------------------------------------*/
1848 /*                                                                  */
1849 /* Name         - peephole_pass                                     */
1850 /*                                                                  */
1851 /* Function     - Form a peephole pass at the code looking for      */
1852 /*                simple optimizations.                             */
1853 /*                                                                  */
1854 /*------------------------------------------------------------------*/
1855
1856 static void
1857 peephole_pass (MonoCompile *cfg, MonoBasicBlock *bb)
1858 {
1859         MonoInst *ins, *last_ins = NULL;
1860         ins = bb->code;
1861
1862         while (ins) {
1863
1864                 switch (ins->opcode) {
1865                 case OP_MUL_IMM:
1866                         /* remove unnecessary multiplication with 1 */
1867                         if (ins->inst_imm == 1) {
1868                                 if (ins->dreg != ins->sreg1) {
1869                                         ins->opcode = OP_MOVE;
1870                                 } else {
1871                                         last_ins->next = ins->next;
1872                                         ins = ins->next;
1873                                         continue;
1874                                 }
1875                         }
1876                         break;
1877                 case OP_LOAD_MEMBASE:
1878                 case OP_LOADI4_MEMBASE:
1879                         /*
1880                          * OP_STORE_MEMBASE_REG reg, offset(basereg)
1881                          * OP_LOAD_MEMBASE offset(basereg), reg
1882                          */
1883                         if (last_ins && (last_ins->opcode == OP_STOREI4_MEMBASE_REG
1884                                          || last_ins->opcode == OP_STORE_MEMBASE_REG) &&
1885                             ins->inst_basereg == last_ins->inst_destbasereg &&
1886                             ins->inst_offset == last_ins->inst_offset) {
1887                                 if (ins->dreg == last_ins->sreg1) {
1888                                         last_ins->next = ins->next;
1889                                         ins = ins->next;
1890                                         continue;
1891                                 } else {
1892                                         //static int c = 0; printf ("MATCHX %s %d\n", cfg->method->name,c++);
1893                                         ins->opcode = OP_MOVE;
1894                                         ins->sreg1 = last_ins->sreg1;
1895                                 }
1896
1897                         /*
1898                          * Note: reg1 must be different from the basereg in the second load
1899                          * OP_LOAD_MEMBASE offset(basereg), reg1
1900                          * OP_LOAD_MEMBASE offset(basereg), reg2
1901                          * -->
1902                          * OP_LOAD_MEMBASE offset(basereg), reg1
1903                          * OP_MOVE reg1, reg2
1904                          */
1905                         } if (last_ins && (last_ins->opcode == OP_LOADI4_MEMBASE
1906                                            || last_ins->opcode == OP_LOAD_MEMBASE) &&
1907                               ins->inst_basereg != last_ins->dreg &&
1908                               ins->inst_basereg == last_ins->inst_basereg &&
1909                               ins->inst_offset == last_ins->inst_offset) {
1910
1911                                 if (ins->dreg == last_ins->dreg) {
1912                                         last_ins->next = ins->next;
1913                                         ins = ins->next;
1914                                         continue;
1915                                 } else {
1916                                         ins->opcode = OP_MOVE;
1917                                         ins->sreg1 = last_ins->dreg;
1918                                 }
1919
1920                                 //g_assert_not_reached ();
1921
1922 #if 0
1923                         /*
1924                          * OP_STORE_MEMBASE_IMM imm, offset(basereg)
1925                          * OP_LOAD_MEMBASE offset(basereg), reg
1926                          * -->
1927                          * OP_STORE_MEMBASE_IMM imm, offset(basereg)
1928                          * OP_ICONST reg, imm
1929                          */
1930                         } else if (last_ins && (last_ins->opcode == OP_STOREI4_MEMBASE_IMM
1931                                                 || last_ins->opcode == OP_STORE_MEMBASE_IMM) &&
1932                                    ins->inst_basereg == last_ins->inst_destbasereg &&
1933                                    ins->inst_offset == last_ins->inst_offset) {
1934                                 //static int c = 0; printf ("MATCHX %s %d\n", cfg->method->name,c++);
1935                                 ins->opcode = OP_ICONST;
1936                                 ins->inst_c0 = last_ins->inst_imm;
1937                                 g_assert_not_reached (); // check this rule
1938 #endif
1939                         }
1940                         break;
1941                 case OP_LOADU1_MEMBASE:
1942                 case OP_LOADI1_MEMBASE:
1943                         if (last_ins && (last_ins->opcode == OP_STOREI1_MEMBASE_REG) &&
1944                                         ins->inst_basereg == last_ins->inst_destbasereg &&
1945                                         ins->inst_offset == last_ins->inst_offset) {
1946                                 if (ins->dreg == last_ins->sreg1) {
1947                                         last_ins->next = ins->next;
1948                                         ins = ins->next;
1949                                         continue;
1950                                 } else {
1951                                         //static int c = 0; printf ("MATCHX %s %d\n", cfg->method->name,c++);
1952                                         ins->opcode = OP_MOVE;
1953                                         ins->sreg1 = last_ins->sreg1;
1954                                 }
1955                         }
1956                         break;
1957                 case OP_LOADU2_MEMBASE:
1958                 case OP_LOADI2_MEMBASE:
1959                         if (last_ins && (last_ins->opcode == OP_STOREI2_MEMBASE_REG) &&
1960                                         ins->inst_basereg == last_ins->inst_destbasereg &&
1961                                         ins->inst_offset == last_ins->inst_offset) {
1962                                 if (ins->dreg == last_ins->sreg1) {
1963                                         last_ins->next = ins->next;
1964                                         ins = ins->next;
1965                                         continue;
1966                                 } else {
1967                                         ins->opcode = OP_MOVE;
1968                                         ins->sreg1 = last_ins->sreg1;
1969                                 }
1970                         }
1971                         break;
1972                 case CEE_CONV_I4:
1973                 case CEE_CONV_U4:
1974                 case OP_MOVE:
1975                         /*
1976                          * OP_MOVE reg, reg
1977                          */
1978                         if (ins->dreg == ins->sreg1) {
1979                                 if (last_ins)
1980                                         last_ins->next = ins->next;
1981                                 ins = ins->next;
1982                                 continue;
1983                         }
1984                         /*
1985                          * OP_MOVE sreg, dreg
1986                          * OP_MOVE dreg, sreg
1987                          */
1988                         if (last_ins && last_ins->opcode == OP_MOVE &&
1989                             ins->sreg1 == last_ins->dreg &&
1990                             ins->dreg == last_ins->sreg1) {
1991                                 last_ins->next = ins->next;
1992                                 ins = ins->next;
1993                                 continue;
1994                         }
1995                         break;
1996                 }
1997                 last_ins = ins;
1998                 ins = ins->next;
1999         }
2000         bb->last_ins = last_ins;
2001 }
2002
2003 /*========================= End of Function ========================*/
2004
2005 /*------------------------------------------------------------------*/
2006 /*                                                                  */
2007 /* Name         - mono_spillvar_offset                              */
2008 /*                                                                  */
2009 /* Function     - Returns the offset used by spillvar. It allocates */
2010 /*                a new spill variable if necessary.                */
2011 /*                                                                  */
2012 /*------------------------------------------------------------------*/
2013
2014 static int
2015 mono_spillvar_offset (MonoCompile *cfg, int spillvar)
2016 {
2017         MonoSpillInfo **si, *info;
2018         int i = 0;
2019
2020         si = &cfg->spill_info;
2021
2022         while (i <= spillvar) {
2023
2024                 if (!*si) {
2025                         *si = info = mono_mempool_alloc (cfg->mempool, sizeof (MonoSpillInfo));
2026                         info->next = NULL;
2027                         info->offset = cfg->stack_offset;
2028                         cfg->stack_offset += sizeof (gpointer);
2029                 }
2030
2031                 if (i == spillvar)
2032                         return (*si)->offset;
2033
2034                 i++;
2035                 si = &(*si)->next;
2036         }
2037
2038         g_assert_not_reached ();
2039         return 0;
2040 }
2041
2042 /*========================= End of Function ========================*/
2043
2044 /*------------------------------------------------------------------*/
2045 /*                                                                  */
2046 /* Name         - mono_spillvar_offset_float                        */
2047 /*                                                                  */
2048 /* Function     -                                                   */
2049 /*                                                                  */
2050 /*------------------------------------------------------------------*/
2051
2052 static int
2053 mono_spillvar_offset_float (MonoCompile *cfg, int spillvar)
2054 {
2055         MonoSpillInfo **si, *info;
2056         int i = 0;
2057
2058         si = &cfg->spill_info_float;
2059
2060         while (i <= spillvar) {
2061
2062                 if (!*si) {
2063                         *si = info = mono_mempool_alloc (cfg->mempool, sizeof (MonoSpillInfo));
2064                         info->next         = NULL;
2065                         cfg->stack_offset  = S390_ALIGN(cfg->stack_offset, S390_STACK_ALIGNMENT);
2066                         info->offset       = cfg->stack_offset;
2067                         cfg->stack_offset += sizeof (double);
2068                 }
2069
2070                 if (i == spillvar)
2071                         return (*si)->offset;
2072
2073                 i++;
2074                 si = &(*si)->next;
2075         }
2076
2077         g_assert_not_reached ();
2078         return 0;
2079 }
2080
2081 /*========================= End of Function ========================*/
2082
2083 /*------------------------------------------------------------------*/
2084 /*                                                                  */
2085 /* Name         - print_ins                                         */
2086 /*                                                                  */
2087 /* Function     - Decode and print the instruction for tracing.     */
2088 /*                                                                  */
2089 /*------------------------------------------------------------------*/
2090
2091 static void
2092 print_ins (int i, MonoInst *ins)
2093 {
2094         const char *spec = ins_spec [ins->opcode];
2095         g_print ("\t%-2d %s", i, mono_inst_name (ins->opcode));
2096         if (spec [MONO_INST_DEST]) {
2097                 if (ins->dreg >= MONO_MAX_IREGS)
2098                         g_print (" R%d <-", ins->dreg);
2099                 else
2100                         g_print (" %s <-", mono_arch_regname (ins->dreg));
2101         }
2102         if (spec [MONO_INST_SRC1]) {
2103                 if (ins->sreg1 >= MONO_MAX_IREGS)
2104                         g_print (" R%d", ins->sreg1);
2105                 else
2106                         g_print (" %s", mono_arch_regname (ins->sreg1));
2107         }
2108         if (spec [MONO_INST_SRC2]) {
2109                 if (ins->sreg2 >= MONO_MAX_IREGS)
2110                         g_print (" R%d", ins->sreg2);
2111                 else
2112                         g_print (" %s", mono_arch_regname (ins->sreg2));
2113         }
2114         if (spec [MONO_INST_CLOB])
2115                 g_print (" clobbers: %c", spec [MONO_INST_CLOB]);
2116         g_print ("\n");
2117 }
2118
2119 /*========================= End of Function ========================*/
2120
2121 /*------------------------------------------------------------------*/
2122 /*                                                                  */
2123 /* Name         - print_regtrack.                                   */
2124 /*                                                                  */
2125 /* Function     -                                                   */
2126 /*                                                                  */
2127 /*------------------------------------------------------------------*/
2128
2129 static void
2130 print_regtrack (RegTrack *t, int num)
2131 {
2132         int i;
2133         char buf [32];
2134         const char *r;
2135
2136         for (i = 0; i < num; ++i) {
2137                 if (!t [i].born_in)
2138                         continue;
2139                 if (i >= MONO_MAX_IREGS) {
2140                         g_snprintf (buf, sizeof(buf), "R%d", i);
2141                         r = buf;
2142                 } else
2143                         r = mono_arch_regname (i);
2144                 g_print ("liveness: %s [%d - %d]\n", r, t [i].born_in, t[i].last_use);
2145         }
2146 }
2147
2148 /*========================= End of Function ========================*/
2149
2150 /*------------------------------------------------------------------*/
2151 /*                                                                  */
2152 /* Name         - inst_list_prepend                                 */
2153 /*                                                                  */
2154 /* Function     - Prepend an instruction to the list.               */
2155 /*                                                                  */
2156 /*------------------------------------------------------------------*/
2157
2158 static inline InstList*
2159 inst_list_prepend (MonoMemPool *pool, InstList *list, MonoInst *data)
2160 {
2161         InstList *item = mono_mempool_alloc (pool, sizeof (InstList));
2162         item->data = data;
2163         item->prev = NULL;
2164         item->next = list;
2165         if (list)
2166                 list->prev = item;
2167         return item;
2168 }
2169
2170 /*========================= End of Function ========================*/
2171
2172 /*------------------------------------------------------------------*/
2173 /*                                                                  */
2174 /* Name         - get_register_force_spilling                       */
2175 /*                                                                  */
2176 /* Function     - Force the spilling of the variable in the         */
2177 /*                symbolic register 'reg'.                          */
2178 /*                                                                  */
2179 /*------------------------------------------------------------------*/
2180
2181 static int
2182 get_register_force_spilling (MonoCompile *cfg, InstList *item, MonoInst *ins, int reg)
2183 {
2184         MonoInst *load;
2185         int i, sel, spill;
2186
2187         sel = cfg->rs->iassign [reg];
2188         i = reg;
2189         spill = ++cfg->spill_count;
2190         cfg->rs->iassign [i] = -spill - 1;
2191         mono_regstate_free_int (cfg->rs, sel);
2192         /*----------------------------------------------------------*/
2193         /* we need to create a spill var and insert a load to sel   */
2194         /* after the current instruction                            */
2195         /*----------------------------------------------------------*/
2196         MONO_INST_NEW (cfg, load, OP_LOAD_MEMBASE);
2197         load->dreg = sel;
2198         load->inst_basereg = cfg->frame_reg;
2199         load->inst_offset = mono_spillvar_offset (cfg, spill);
2200         if (item->prev) {
2201                 while (ins->next != item->prev->data)
2202                         ins = ins->next;
2203         }
2204         load->next = ins->next;
2205         ins->next  = load;
2206         DEBUG (g_print ("SPILLED LOAD (%d at 0x%08x(%%sp)) R%d (freed %s)\n",
2207                         spill, load->inst_offset, i, mono_arch_regname (sel)));
2208         i = mono_regstate_alloc_int (cfg->rs, 1 << sel);
2209         g_assert (i == sel);
2210
2211         return sel;
2212 }
2213
2214 /*========================= End of Function ========================*/
2215
2216 /*------------------------------------------------------------------*/
2217 /*                                                                  */
2218 /* Name         -  get_register_spilling                            */
2219 /*                                                                  */
2220 /* Function     -                                                   */
2221 /*                                                                  */
2222 /*------------------------------------------------------------------*/
2223
2224 static int
2225 get_register_spilling (MonoCompile *cfg, InstList *item, MonoInst *ins, guint32 regmask, int reg)
2226 {
2227         MonoInst *load;
2228         int i, sel, spill;
2229
2230         DEBUG (g_print ("start regmask to assign R%d: 0x%08x (R%d <- R%d R%d)\n", reg, regmask, ins->dreg, ins->sreg1, ins->sreg2));
2231         /* exclude the registers in the current instruction */
2232         if (reg != ins->sreg1 &&
2233             (reg_is_freeable (ins->sreg1) ||
2234              (ins->sreg1 >= MONO_MAX_IREGS &&
2235               cfg->rs->iassign [ins->sreg1] >= 0))) {
2236                 if (ins->sreg1 >= MONO_MAX_IREGS)
2237                         regmask &= ~ (1 << cfg->rs->iassign [ins->sreg1]);
2238                 else
2239                         regmask &= ~ (1 << ins->sreg1);
2240                 DEBUG (g_print ("excluding sreg1 %s\n", mono_arch_regname (ins->sreg1)));
2241         }
2242         if (reg != ins->sreg2 &&
2243             (reg_is_freeable (ins->sreg2) ||
2244              (ins->sreg2 >= MONO_MAX_IREGS &&
2245               cfg->rs->iassign [ins->sreg2] >= 0))) {
2246                 if (ins->sreg2 >= MONO_MAX_IREGS)
2247                         regmask &= ~ (1 << cfg->rs->iassign [ins->sreg2]);
2248                 else
2249                         regmask &= ~ (1 << ins->sreg2);
2250                 DEBUG (g_print ("excluding sreg2 %s %d\n", mono_arch_regname (ins->sreg2), ins->sreg2));
2251         }
2252         if (reg != ins->dreg && reg_is_freeable (ins->dreg)) {
2253                 regmask &= ~ (1 << ins->dreg);
2254                 DEBUG (g_print ("excluding dreg %s\n", mono_arch_regname (ins->dreg)));
2255         }
2256
2257         DEBUG (g_print ("available regmask: 0x%08x\n", regmask));
2258         g_assert (regmask); /* need at least a register we can free */
2259         sel = -1;
2260         /* we should track prev_use and spill the register that's farther */
2261         for (i = 0; i < MONO_MAX_IREGS; ++i) {
2262                 if (regmask & (1 << i)) {
2263                         sel = i;
2264                         DEBUG (g_print ("selected register %s has assignment %d\n", mono_arch_regname (sel), cfg->rs->iassign [sel]));
2265                         break;
2266                 }
2267         }
2268         i = cfg->rs->isymbolic [sel];
2269         spill = ++cfg->spill_count;
2270         cfg->rs->iassign [i] = -spill - 1;
2271         mono_regstate_free_int (cfg->rs, sel);
2272         /* we need to create a spill var and insert a load to sel after the current instruction */
2273         MONO_INST_NEW (cfg, load, OP_LOAD_MEMBASE);
2274         load->dreg = sel;
2275         load->inst_basereg = cfg->frame_reg;
2276         load->inst_offset = mono_spillvar_offset (cfg, spill);
2277         if (item->prev) {
2278                 while (ins->next != item->prev->data)
2279                         ins = ins->next;
2280         }
2281         load->next = ins->next;
2282         ins->next = load;
2283         DEBUG (g_print ("SPILLED LOAD (%d at 0x%08x(%%sp)) R%d (freed %s)\n", spill, load->inst_offset, i, mono_arch_regname (sel)));
2284         i = mono_regstate_alloc_int (cfg->rs, 1 << sel);
2285         g_assert (i == sel);
2286
2287         return sel;
2288 }
2289
2290 /*========================= End of Function ========================*/
2291
2292 /*------------------------------------------------------------------*/
2293 /*                                                                  */
2294 /* Name         - get_float_register_spilling                       */
2295 /*                                                                  */
2296 /* Function     -                                                   */
2297 /*                                                                  */
2298 /*------------------------------------------------------------------*/
2299
2300 static int
2301 get_float_register_spilling (MonoCompile *cfg, InstList *item, MonoInst *ins, guint32 regmask, int reg)
2302 {
2303         MonoInst *load;
2304         int i, sel, spill;
2305
2306         DEBUG (g_print ("start regmask to assign R%d: 0x%08x (R%d <- R%d R%d)\n", reg, regmask, ins->dreg, ins->sreg1, ins->sreg2));
2307         /* exclude the registers in the current instruction */
2308         if (reg != ins->sreg1 &&
2309             (freg_is_freeable (ins->sreg1) ||
2310              (ins->sreg1 >= MONO_MAX_FREGS &&
2311               cfg->rs->fassign [ins->sreg1] >= 0))) {
2312                 if (ins->sreg1 >= MONO_MAX_FREGS)
2313                         regmask &= ~ (1 << cfg->rs->fassign [ins->sreg1]);
2314                 else
2315                         regmask &= ~ (1 << ins->sreg1);
2316                 DEBUG (g_print ("excluding sreg1 %s\n", mono_arch_regname (ins->sreg1)));
2317         }
2318         if (reg != ins->sreg2 &&
2319             (freg_is_freeable (ins->sreg2) ||
2320              (ins->sreg2 >= MONO_MAX_FREGS &&
2321               cfg->rs->fassign [ins->sreg2] >= 0))) {
2322                 if (ins->sreg2 >= MONO_MAX_FREGS)
2323                         regmask &= ~ (1 << cfg->rs->fassign [ins->sreg2]);
2324                 else
2325                         regmask &= ~ (1 << ins->sreg2);
2326                 DEBUG (g_print ("excluding sreg2 %s %d\n", mono_arch_regname (ins->sreg2), ins->sreg2));
2327         }
2328         if (reg != ins->dreg && freg_is_freeable (ins->dreg)) {
2329                 regmask &= ~ (1 << ins->dreg);
2330                 DEBUG (g_print ("excluding dreg %s\n", mono_arch_regname (ins->dreg)));
2331         }
2332
2333         DEBUG (g_print ("available regmask: 0x%08x\n", regmask));
2334         g_assert (regmask); /* need at least a register we can free */
2335         sel = -1;
2336         /* we should track prev_use and spill the register that's farther */
2337         for (i = 0; i < MONO_MAX_FREGS; ++i) {
2338                 if (regmask & (1 << i)) {
2339                         sel = i;
2340                         DEBUG (g_print ("selected register %s has assignment %d\n",
2341                                         mono_arch_regname (sel), cfg->rs->fassign [sel]));
2342                         break;
2343                 }
2344         }
2345         i = cfg->rs->fsymbolic [sel];
2346         spill = ++cfg->spill_count;
2347         cfg->rs->fassign [i] = -spill - 1;
2348         mono_regstate_free_float(cfg->rs, sel);
2349         /* we need to create a spill var and insert a load to sel after the current instruction */
2350         MONO_INST_NEW (cfg, load, OP_LOADR8_MEMBASE);
2351         load->dreg = sel;
2352         load->inst_basereg = cfg->frame_reg;
2353         load->inst_offset = mono_spillvar_offset_float (cfg, spill);
2354         if (item->prev) {
2355                 while (ins->next != item->prev->data)
2356                         ins = ins->next;
2357         }
2358         load->next = ins->next;
2359         ins->next = load;
2360         DEBUG (g_print ("SPILLED LOAD (%d at 0x%08x(%%sp)) R%d (freed %s)\n", spill, load->inst_offset, i, mono_arch_regname (sel)));
2361         i = mono_regstate_alloc_float (cfg->rs, 1 << sel);
2362         g_assert (i == sel);
2363
2364         return sel;
2365 }
2366
2367 /*========================= End of Function ========================*/
2368
2369 /*------------------------------------------------------------------*/
2370 /*                                                                  */
2371 /* Name         - create_copy_ins                                   */
2372 /*                                                                  */
2373 /* Function     - Create an instruction to copy from reg to reg.    */
2374 /*                                                                  */
2375 /*------------------------------------------------------------------*/
2376
2377 static MonoInst*
2378 create_copy_ins (MonoCompile *cfg, int dest, int src, MonoInst *ins)
2379 {
2380         MonoInst *copy;
2381         MONO_INST_NEW (cfg, copy, OP_MOVE);
2382         copy->dreg = dest;
2383         copy->sreg1 = src;
2384         if (ins) {
2385                 copy->next = ins->next;
2386                 ins->next = copy;
2387         }
2388         DEBUG (g_print ("\tforced copy from %s to %s\n",
2389                         mono_arch_regname (src), mono_arch_regname (dest)));
2390         return copy;
2391 }
2392
2393 /*========================= End of Function ========================*/
2394
2395 /*------------------------------------------------------------------*/
2396 /*                                                                  */
2397 /* Name         - create_copy_ins_float                             */
2398 /*                                                                  */
2399 /* Function     - Create an instruction to copy from float reg to   */
2400 /*                float reg.                                        */
2401 /*                                                                  */
2402 /*------------------------------------------------------------------*/
2403
2404 static MonoInst*
2405 create_copy_ins_float (MonoCompile *cfg, int dest, int src, MonoInst *ins)
2406 {
2407         MonoInst *copy;
2408         MONO_INST_NEW (cfg, copy, OP_FMOVE);
2409         copy->dreg = dest;
2410         copy->sreg1 = src;
2411         if (ins) {
2412                 copy->next = ins->next;
2413                 ins->next = copy;
2414         }
2415         DEBUG (g_print ("\tforced copy from %s to %s\n",
2416                         mono_arch_regname (src), mono_arch_regname (dest)));
2417         return copy;
2418 }
2419
2420 /*========================= End of Function ========================*/
2421
2422 /*------------------------------------------------------------------*/
2423 /*                                                                  */
2424 /* Name         - create_spilled_store                              */
2425 /*                                                                  */
2426 /* Function     - Spill register to storage.                        */
2427 /*                                                                  */
2428 /*------------------------------------------------------------------*/
2429
2430 static MonoInst*
2431 create_spilled_store (MonoCompile *cfg, int spill, int reg, int prev_reg, MonoInst *ins)
2432 {
2433         MonoInst *store;
2434         MONO_INST_NEW (cfg, store, OP_STORE_MEMBASE_REG);
2435         store->sreg1 = reg;
2436         store->inst_destbasereg = cfg->frame_reg;
2437         store->inst_offset = mono_spillvar_offset (cfg, spill);
2438         if (ins) {
2439                 store->next = ins->next;
2440                 ins->next = store;
2441         }
2442         DEBUG (g_print ("SPILLED STORE (%d at 0x%08x(%%sp)) R%d (from %s)\n",
2443                         spill, store->inst_offset, prev_reg, mono_arch_regname (reg)));
2444         return store;
2445 }
2446
2447 /*========================= End of Function ========================*/
2448
2449 /*------------------------------------------------------------------*/
2450 /*                                                                  */
2451 /* Name         - create_spilled_store_float                        */
2452 /*                                                                  */
2453 /* Function     - Spill floating point register to storage.         */
2454 /*                                                                  */
2455 /*------------------------------------------------------------------*/
2456
2457 static MonoInst*
2458 create_spilled_store_float (MonoCompile *cfg, int spill, int reg, int prev_reg, MonoInst *ins)
2459 {
2460         MonoInst *store;
2461         MONO_INST_NEW (cfg, store, OP_STORER8_MEMBASE_REG);
2462         store->sreg1 = reg;
2463         store->inst_destbasereg = cfg->frame_reg;
2464         store->inst_offset = mono_spillvar_offset_float (cfg, spill);
2465         if (ins) {
2466                 store->next = ins->next;
2467                 ins->next = store;
2468         }
2469         DEBUG (g_print ("SPILLED STORE (%d at 0x%08x(%%sp)) R%d (from %s)\n",
2470                         spill, store->inst_offset, prev_reg, mono_arch_regname (reg)));
2471         return store;
2472 }
2473
2474 /*========================= End of Function ========================*/
2475
2476 /*------------------------------------------------------------------*/
2477 /*                                                                  */
2478 /* Name         - insert_before_ins                                 */
2479 /*                                                                  */
2480 /* Function     - Insert an instruction before another.             */
2481 /*                                                                  */
2482 /*------------------------------------------------------------------*/
2483
2484 static void
2485 insert_before_ins (MonoInst *ins, InstList *item, MonoInst* to_insert)
2486 {
2487         MonoInst *prev;
2488         g_assert (item->next);
2489         prev = item->next->data;
2490
2491         while (prev->next != ins)
2492                 prev = prev->next;
2493         to_insert->next = ins;
2494         prev->next = to_insert;
2495         /*
2496          * needed otherwise in the next instruction we can add an ins to the
2497          * end and that would get past this instruction.
2498          */
2499         item->data = to_insert;
2500 }
2501
2502 /*========================= End of Function ========================*/
2503
2504 /*------------------------------------------------------------------*/
2505 /*                                                                  */
2506 /* Name         - alloc_int_reg                                     */
2507 /*                                                                  */
2508 /* Function     - Allocate a general register.                      */
2509 /*                                                                  */
2510 /*------------------------------------------------------------------*/
2511
2512 static int
2513 alloc_int_reg (MonoCompile *cfg, InstList *curinst, MonoInst *ins, int sym_reg, guint32 allow_mask)
2514 {
2515         int val = cfg->rs->iassign [sym_reg];
2516         DEBUG (g_print ("Allocating a general register for %d (%d) with mask %08x\n",val,sym_reg,allow_mask));
2517         if (val < 0) {
2518                 int spill = 0;
2519                 if (val < -1) {
2520                         /* the register gets spilled after this inst */
2521                         spill = -val -1;
2522                 }
2523                 val = mono_regstate_alloc_int (cfg->rs, allow_mask);
2524                 if (val < 0)
2525                         val = get_register_spilling (cfg, curinst, ins, allow_mask, sym_reg);
2526                 cfg->rs->iassign [sym_reg] = val;
2527                 /* add option to store before the instruction for src registers */
2528                 if (spill)
2529                         create_spilled_store (cfg, spill, val, sym_reg, ins);
2530         }
2531         DEBUG (g_print ("Allocated %d for %d\n",val,sym_reg));
2532         cfg->rs->isymbolic [val] = sym_reg;
2533         return val;
2534 }
2535
2536 /*========================= End of Function ========================*/
2537
2538 /*------------------------------------------------------------------*/
2539 /*                                                                  */
2540 /* Name         - mono_arch_local_regalloc.                         */
2541 /*                                                                  */
2542 /* Function     - We first scan the list of instructions and we     */
2543 /*                save the liveness information of each register    */
2544 /*                (when the register is first used, when its value  */
2545 /*                is set etc.). We also reverse the list of instr-  */
2546 /*                uctions (in the InstList list) because assigning  */
2547 /*                registers backwards allows for more tricks to be  */
2548 /*                used.                                             */
2549 /*                                                                  */
2550 /*------------------------------------------------------------------*/
2551
2552 void
2553 mono_arch_local_regalloc (MonoCompile *cfg, MonoBasicBlock *bb)
2554 {
2555         MonoInst *ins;
2556         MonoRegState *rs = cfg->rs;
2557         int i, val;
2558         RegTrack *reginfo, *reginfof;
2559         RegTrack *reginfo1, *reginfo2, *reginfod;
2560         InstList *tmp, *reversed = NULL;
2561         const char *spec;
2562         guint32 src1_mask, src2_mask, dest_mask;
2563         guint32 cur_iregs, cur_fregs;
2564
2565         if (!bb->code)
2566                 return;
2567         rs->next_vireg = bb->max_ireg;
2568         rs->next_vfreg = bb->max_freg;
2569         mono_regstate_assign (rs);
2570         reginfo = mono_mempool_alloc0 (cfg->mempool, sizeof (RegTrack) * rs->next_vireg);
2571         reginfof = mono_mempool_alloc0 (cfg->mempool, sizeof (RegTrack) * rs->next_vfreg);
2572         rs->ifree_mask = S390_CALLER_REGS;
2573         rs->ffree_mask = S390_CALLER_FREGS;
2574
2575         ins = bb->code;
2576         i = 1;
2577         DEBUG (g_print ("LOCAL regalloc: basic block: %d\n", bb->block_num));
2578         /* forward pass on the instructions to collect register liveness info */
2579         while (ins) {
2580                 spec = ins_spec [ins->opcode];
2581                 DEBUG (print_ins (i, ins));
2582                 if (spec [MONO_INST_CLOB] == 'c') {
2583                         MonoCallInst * call = (MonoCallInst*)ins;
2584                         int j;
2585                 }
2586                 if (spec [MONO_INST_SRC1]) {
2587                         if (spec [MONO_INST_SRC1] == 'f')
2588                                 reginfo1 = reginfof;
2589                         else
2590                                 reginfo1 = reginfo;
2591                         reginfo1 [ins->sreg1].prev_use = reginfo1 [ins->sreg1].last_use;
2592                         reginfo1 [ins->sreg1].last_use = i;
2593                 } else {
2594                         ins->sreg1 = -1;
2595                 }
2596                 if (spec [MONO_INST_SRC2]) {
2597                         if (spec [MONO_INST_SRC2] == 'f')
2598                                 reginfo2 = reginfof;
2599                         else
2600                                 reginfo2 = reginfo;
2601                         reginfo2 [ins->sreg2].prev_use = reginfo2 [ins->sreg2].last_use;
2602                         reginfo2 [ins->sreg2].last_use = i;
2603                 } else {
2604                         ins->sreg2 = -1;
2605                 }
2606                 if (spec [MONO_INST_DEST]) {
2607                         if (spec [MONO_INST_DEST] == 'f')
2608                                 reginfod = reginfof;
2609                         else
2610                                 reginfod = reginfo;
2611                         if (spec [MONO_INST_DEST] != 'b') /* it's not just a base register */
2612                                 reginfod [ins->dreg].killed_in = i;
2613                         reginfod [ins->dreg].prev_use = reginfod [ins->dreg].last_use;
2614                         reginfod [ins->dreg].last_use = i;
2615                         if (reginfod [ins->dreg].born_in == 0 || reginfod [ins->dreg].born_in > i)
2616                                 reginfod [ins->dreg].born_in = i;
2617                         if (spec [MONO_INST_DEST] == 'l') {
2618                                 /* result in eax:edx, the virtual register is allocated sequentially */
2619                                 reginfod [ins->dreg + 1].prev_use = reginfod [ins->dreg + 1].last_use;
2620                                 reginfod [ins->dreg + 1].last_use = i;
2621                                 if (reginfod [ins->dreg + 1].born_in == 0 || reginfod [ins->dreg + 1].born_in > i)
2622                                         reginfod [ins->dreg + 1].born_in = i;
2623                         }
2624                 } else {
2625                         ins->dreg = -1;
2626                 }
2627                 reversed = inst_list_prepend (cfg->mempool, reversed, ins);
2628                 ++i;
2629                 ins = ins->next;
2630         }
2631
2632         cur_iregs = S390_CALLER_REGS;
2633         cur_fregs = S390_CALLER_FREGS;
2634
2635         DEBUG (print_regtrack (reginfo, rs->next_vireg));
2636         DEBUG (print_regtrack (reginfof, rs->next_vfreg));
2637         tmp = reversed;
2638         while (tmp) {
2639                 int prev_dreg, prev_sreg1, prev_sreg2;
2640                 --i;
2641                 ins = tmp->data;
2642                 spec = ins_spec [ins->opcode];
2643                 DEBUG (g_print ("processing:"));
2644                 DEBUG (print_ins (i, ins));
2645                 /* make the register available for allocation: FIXME add fp reg */
2646                 if (ins->opcode == OP_SETREG || ins->opcode == OP_SETREGIMM) {
2647                         cur_iregs |= 1 << ins->dreg;
2648                         DEBUG (g_print ("adding %d to cur_iregs\n", ins->dreg));
2649                 } else if (ins->opcode == OP_SETFREG) {
2650                         cur_fregs |= 1 << ins->dreg;
2651                         DEBUG (g_print ("adding %d to cur_fregs\n", ins->dreg));
2652                 } else if (spec [MONO_INST_CLOB] == 'c') {
2653                         MonoCallInst *cinst = (MonoCallInst*)ins;
2654                         DEBUG (g_print ("excluding regs 0x%x from cur_iregs (0x%x)\n",
2655                                         cinst->used_iregs, cur_iregs));
2656                         DEBUG (g_print ("excluding fpregs 0x%x from cur_fregs (0x%x)\n",
2657                                         cinst->used_fregs, cur_fregs));
2658                         cur_iregs &= ~cinst->used_iregs;
2659                         cur_fregs &= ~cinst->used_fregs;
2660                         DEBUG (g_print ("available cur_iregs: 0x%x\n", cur_iregs));
2661                         DEBUG (g_print ("available cur_fregs: 0x%x\n", cur_fregs));
2662                         /*------------------------------------------------------------*/
2663                         /* registers used by the calling convention are excluded from */
2664                         /* allocation: they will be selectively enabled when they are */
2665                         /* assigned by the special SETREG opcodes.                    */
2666                         /*------------------------------------------------------------*/
2667                 }
2668                 dest_mask = src1_mask = src2_mask = cur_iregs;
2669                 /*------------------------------------------------------*/
2670                 /* update for use with FP regs...                       */
2671                 /*------------------------------------------------------*/
2672                 if (spec [MONO_INST_DEST] == 'f') {
2673                         dest_mask = cur_fregs;
2674                         if (ins->dreg >= MONO_MAX_FREGS) {
2675                                 val = rs->fassign [ins->dreg];
2676                                 prev_dreg = ins->dreg;
2677                                 if (val < 0) {
2678                                         int spill = 0;
2679                                         if (val < -1) {
2680                                                 /* the register gets spilled after this inst */
2681                                                 spill = -val -1;
2682                                         }
2683                                         val = mono_regstate_alloc_float (rs, dest_mask);
2684                                         if (val < 0)
2685                                                 val = get_float_register_spilling (cfg, tmp, ins, dest_mask, ins->dreg);
2686                                         rs->fassign [ins->dreg] = val;
2687                                         if (spill)
2688                                                 create_spilled_store_float (cfg, spill, val, prev_dreg, ins);
2689                                 }
2690                                 DEBUG (g_print ("\tassigned dreg %s to dest R%d\n",
2691                                                 mono_arch_regname (val), ins->dreg));
2692                                 rs->fsymbolic [val] = prev_dreg;
2693                                 ins->dreg = val;
2694                                 if (spec [MONO_INST_CLOB] == 'c' && ins->dreg != s390_f0) {
2695                                         /* this instruction only outputs to s390_f0, need to copy */
2696                                         create_copy_ins_float (cfg, ins->dreg, s390_f0, ins);
2697                                 }
2698                         } else {
2699                                 prev_dreg = -1;
2700                         }
2701                         if (freg_is_freeable (ins->dreg) && prev_dreg >= 0 && (reginfof [prev_dreg].born_in >= i || !(cur_fregs & (1 << ins->dreg)))) {
2702                                 DEBUG (g_print ("\tfreeable %s (R%d) (born in %d)\n", mono_arch_regname (ins->dreg), prev_dreg, reginfo [prev_dreg].born_in));
2703                                 mono_regstate_free_float (rs, ins->dreg);
2704                         }
2705                 } else if (ins->dreg >= MONO_MAX_IREGS) {
2706                         val = rs->iassign [ins->dreg];
2707                         prev_dreg = ins->dreg;
2708                         if (val < 0) {
2709                                 int spill = 0;
2710                                 if (val < -1) {
2711                                         /* the register gets spilled after this inst */
2712                                         spill = -val -1;
2713                                 }
2714                                 val = mono_regstate_alloc_int (rs, dest_mask);
2715                                 if (val < 0)
2716                                         val = get_register_spilling (cfg, tmp, ins, dest_mask, ins->dreg);
2717                                 rs->iassign [ins->dreg] = val;
2718                                 if (spill)
2719                                         create_spilled_store (cfg, spill, val, prev_dreg, ins);
2720                         }
2721                         DEBUG (g_print ("\tassigned dreg %s to dest R%d (prev: R%d)\n",
2722                                         mono_arch_regname (val), ins->dreg, prev_dreg));
2723                         rs->isymbolic [val] = prev_dreg;
2724                         ins->dreg = val;
2725                         if (spec [MONO_INST_DEST] == 'l') {
2726                                 int hreg = prev_dreg + 1;
2727                                 val = rs->iassign [hreg];
2728                                 if (val < 0) {
2729                                         int spill = 0;
2730                                         if (val < -1) {
2731                                                 /* the register gets spilled after this inst */
2732                                                 spill = -val -1;
2733                                         }
2734                                         val = mono_regstate_alloc_int (rs, dest_mask);
2735                                         if (val < 0)
2736                                                 val = get_register_spilling (cfg, tmp, ins, dest_mask, hreg);
2737                                         rs->iassign [hreg] = val;
2738                                         if (spill)
2739                                                 create_spilled_store (cfg, spill, val, hreg, ins);
2740                                 }
2741                                 DEBUG (g_print ("\tassigned hreg %s to dest R%d\n", mono_arch_regname (val), hreg));
2742                                 rs->isymbolic [val] = hreg;
2743                                 /* FIXME:? ins->dreg = val; */
2744                                 if (ins->dreg == s390_r3) {
2745                                         if (val != s390_r2)
2746                                                 create_copy_ins (cfg, val, s390_r2, ins);
2747                                 } else if (ins->dreg == s390_r2) {
2748                                         if (val == s390_r3) {
2749                                                 /* swap */
2750                                                 create_copy_ins (cfg, s390_r3, s390_r0, ins);
2751                                                 create_copy_ins (cfg, s390_r2, s390_r3, ins);
2752                                                 create_copy_ins (cfg, s390_r0, s390_r2, ins);
2753                                         } else {
2754                                                 /* two forced copies */
2755                                                 create_copy_ins (cfg, ins->dreg, s390_r3, ins);
2756                                                 create_copy_ins (cfg, val, s390_r2, ins);
2757                                         }
2758                                 } else {
2759                                         if (val == s390_r2) {
2760                                                 create_copy_ins (cfg, ins->dreg, s390_r2, ins);
2761                                         } else {
2762                                                 /* two forced copies */
2763                                                 create_copy_ins (cfg, val, s390_r2, ins);
2764                                                 create_copy_ins (cfg, ins->dreg, s390_r3, ins);
2765                                         }
2766                                 }
2767                                 if (reg_is_freeable (val) && hreg >= 0 && (reginfo [hreg].born_in >= i && !(cur_iregs & (1 << val)))) {
2768                                         DEBUG (g_print ("\tfreeable %s (R%d)\n", mono_arch_regname (val), hreg));
2769                                         mono_regstate_free_int (rs, val);
2770                                 }
2771                         } else if (spec [MONO_INST_DEST] == 'a' && ins->dreg != s390_r2 && spec [MONO_INST_CLOB] != 'd') {
2772                                 /* this instruction only outputs to s390_r2, need to copy */
2773                                 create_copy_ins (cfg, ins->dreg, s390_r2, ins);
2774                         }
2775                 } else {
2776                         prev_dreg = -1;
2777                 }
2778                 if (spec [MONO_INST_DEST] == 'f' &&
2779                     freg_is_freeable (ins->dreg) &&
2780                     prev_dreg >= 0 && (reginfof [prev_dreg].born_in >= i)) {
2781                         DEBUG (g_print ("\tfreeable %s (R%d) (born in %d)\n", mono_arch_regname (ins->dreg), prev_dreg, reginfo [prev_dreg].born_in));
2782                         mono_regstate_free_float (rs, ins->dreg);
2783                 } else if (spec [MONO_INST_DEST] != 'f' &&
2784                            reg_is_freeable (ins->dreg) &&
2785                            prev_dreg >= 0 && (reginfo [prev_dreg].born_in >= i)) {
2786                         DEBUG (g_print ("\tfreeable %s (R%d) (born in %d)\n", mono_arch_regname (ins->dreg), prev_dreg, reginfo [prev_dreg].born_in));
2787                          mono_regstate_free_int (rs, ins->dreg);
2788                 }
2789                 if (spec [MONO_INST_SRC1] == 'f') {
2790                         src1_mask = cur_fregs;
2791                         if (ins->sreg1 >= MONO_MAX_FREGS) {
2792                                 val = rs->fassign [ins->sreg1];
2793                                 prev_sreg1 = ins->sreg1;
2794                                 if (val < 0) {
2795                                         int spill = 0;
2796                                         if (val < -1) {
2797                                                 /* the register gets spilled after this inst */
2798                                                 spill = -val -1;
2799                                         }
2800                                         //g_assert (val == -1); /* source cannot be spilled */
2801                                         val = mono_regstate_alloc_float (rs, src1_mask);
2802                                         if (val < 0)
2803                                                 val = get_float_register_spilling (cfg, tmp, ins, src1_mask, ins->sreg1);
2804                                         rs->fassign [ins->sreg1] = val;
2805                                         DEBUG (g_print ("\tassigned sreg1 %s to R%d\n", mono_arch_regname (val), ins->sreg1));
2806                                         if (spill) {
2807                                                 MonoInst *store = create_spilled_store_float (cfg, spill, val, prev_sreg1, NULL);
2808                                                 insert_before_ins (ins, tmp, store);
2809                                         }
2810                                 }
2811                                 rs->fsymbolic [val] = prev_sreg1;
2812                                 ins->sreg1 = val;
2813                         } else {
2814                                 prev_sreg1 = -1;
2815                         }
2816                 } else if (ins->sreg1 >= MONO_MAX_IREGS) {
2817                         val = rs->iassign [ins->sreg1];
2818                         prev_sreg1 = ins->sreg1;
2819                         if (val < 0) {
2820                                 int spill = 0;
2821                                 if (val < -1) {
2822                                         /* the register gets spilled after this inst */
2823                                         spill = -val -1;
2824                                 }
2825                                 val = mono_regstate_alloc_int (rs, src1_mask);
2826                                 if (val < 0)
2827                                         val = get_register_spilling (cfg, tmp, ins,
2828                                                                      src1_mask,
2829                                                                      ins->sreg1);
2830                                 rs->iassign [ins->sreg1] = val;
2831                                 DEBUG (g_print ("\tassigned sreg1 %s to R%d\n",
2832                                                 mono_arch_regname (val), ins->sreg1));
2833                                 if (spill) {
2834                                         MonoInst *store;
2835                                         store = create_spilled_store (cfg, spill, val,
2836                                                                       prev_sreg1, NULL);
2837                                         insert_before_ins (ins, tmp, store);
2838                                 }
2839                         }
2840                         rs->isymbolic [val] = prev_sreg1;
2841                         ins->sreg1 = val;
2842                 } else {
2843                         prev_sreg1 = -1;
2844                 }
2845                 /*----------------------------------------------*/
2846                 /* handle clobbering of sreg1                   */
2847                 /*----------------------------------------------*/
2848                 if ((spec [MONO_INST_CLOB] == '1' ||
2849                      spec [MONO_INST_CLOB] == 's') &&
2850                     ins->dreg != ins->sreg1) {
2851                         MonoInst *copy;
2852                         copy = create_copy_ins (cfg, ins->dreg, ins->sreg1, NULL);
2853                         DEBUG (g_print ("\tneed to copy sreg1 %s to dreg %s\n",
2854                                         mono_arch_regname (ins->sreg1),
2855                                         mono_arch_regname (ins->dreg)));
2856                         if (ins->sreg2 == -1 || spec [MONO_INST_CLOB] == 's') {
2857                                 /* note: the copy is inserted before the current instruction! */
2858                                 insert_before_ins (ins, tmp, copy);
2859                                 /* we set sreg1 to dest as well */
2860                                 prev_sreg1 = ins->sreg1 = ins->dreg;
2861                         } else {
2862                                 /* inserted after the operation */
2863                                 copy->next = ins->next;
2864                                 ins->next  = copy;
2865                         }
2866                 }
2867
2868                 if (spec [MONO_INST_SRC2] == 'f') {
2869                         src2_mask = cur_fregs;
2870                         if (ins->sreg2 >= MONO_MAX_FREGS) {
2871                                 val = rs->fassign [ins->sreg2];
2872                                 prev_sreg2 = ins->sreg2;
2873                                 if (val < 0) {
2874                                         int spill = 0;
2875                                         if (val < -1) {
2876                                                 /* the register gets spilled after this inst */
2877                                                 spill = -val -1;
2878                                         }
2879                                         val = mono_regstate_alloc_float (rs, src2_mask);
2880                                         if (val < 0)
2881                                                 val = get_float_register_spilling (cfg, tmp, ins, src2_mask, ins->sreg2);
2882                                         rs->fassign [ins->sreg2] = val;
2883                                         DEBUG (g_print ("\tassigned sreg2 %s to R%d\n", mono_arch_regname (val), ins->sreg2));
2884                                         if (spill)
2885                                                 create_spilled_store_float (cfg, spill, val, prev_sreg2, ins);
2886                                 }
2887                                 rs->fsymbolic [val] = prev_sreg2;
2888                                 ins->sreg2 = val;
2889                         } else {
2890                                 prev_sreg2 = -1;
2891                         }
2892                 } else if (ins->sreg2 >= MONO_MAX_IREGS) {
2893                         val = rs->iassign [ins->sreg2];
2894                         prev_sreg2 = ins->sreg2;
2895                         if (val < 0) {
2896                                 int spill = 0;
2897                                 if (val < -1) {
2898                                         /* the register gets spilled after this inst */
2899                                         spill = -val -1;
2900                                 }
2901                                 val = mono_regstate_alloc_int (rs, src2_mask);
2902                                 if (val < 0)
2903                                         val = get_register_spilling (cfg, tmp, ins, src2_mask, ins->sreg2);
2904                                 rs->iassign [ins->sreg2] = val;
2905                                 DEBUG (g_print ("\tassigned sreg2 %s to R%d\n", mono_arch_regname (val), ins->sreg2));
2906                                 if (spill)
2907                                         create_spilled_store (cfg, spill, val, prev_sreg2, ins);
2908                         }
2909                         rs->isymbolic [val] = prev_sreg2;
2910                         ins->sreg2 = val;
2911                 } else {
2912                         prev_sreg2 = -1;
2913                 }
2914
2915                 if (spec [MONO_INST_CLOB] == 'c') {
2916                         int j, s;
2917                         guint32 clob_mask = S390_CALLER_REGS;
2918                         for (j = 0; j < MONO_MAX_IREGS; ++j) {
2919                                 s = 1 << j;
2920                                 if ((clob_mask & s) && !(rs->ifree_mask & s) && j != ins->sreg1) {
2921                                         //g_warning ("register %s busy at call site\n", mono_arch_regname (j));
2922                                 }
2923                         }
2924                 }
2925                 /*if (reg_is_freeable (ins->sreg1) && prev_sreg1 >= 0 && reginfo [prev_sreg1].born_in >= i) {
2926                         DEBUG (g_print ("freeable %s\n", mono_arch_regname (ins->sreg1)));
2927                         mono_regstate_free_int (rs, ins->sreg1);
2928                 }
2929                 if (reg_is_freeable (ins->sreg2) && prev_sreg2 >= 0 && reginfo [prev_sreg2].born_in >= i) {
2930                         DEBUG (g_print ("freeable %s\n", mono_arch_regname (ins->sreg2)));
2931                         mono_regstate_free_int (rs, ins->sreg2);
2932                 }*/
2933
2934                 //DEBUG (print_ins (i, ins));
2935                 tmp = tmp->next;
2936         }
2937 }
2938
2939 /*========================= End of Function ========================*/
2940
2941 /*------------------------------------------------------------------*/
2942 /*                                                                  */
2943 /* Name         - emit_float_to_int                                 */
2944 /*                                                                  */
2945 /* Function     - Create instructions which will convert a floating */
2946 /*                point value to integer.                           */
2947 /*                                                                  */
2948 /*------------------------------------------------------------------*/
2949
2950 static guchar*
2951 emit_float_to_int (MonoCompile *cfg, guchar *code, int dreg, int sreg, int size, gboolean is_signed)
2952 {
2953         /* sreg is a float, dreg is an integer reg. */
2954         if (is_signed) {
2955                 s390_cfdbr (code, dreg, 5, sreg);
2956                 switch (size) {
2957                         case 1:
2958                                 s390_lhi  (code, s390_r0, 0);
2959                                 s390_lhi  (code, s390_r13, 0xff);
2960                                 s390_ltr  (code, dreg, dreg);
2961                                 s390_jnl  (code, 4);
2962                                 s390_lhi  (code, s390_r0, 0x80);
2963                                 s390_nr   (code, dreg, s390_r13);
2964                                 s390_or   (code, dreg, s390_r0);
2965                                 break;
2966                 }
2967         } else {
2968                 s390_basr   (code, s390_r13, 0);
2969                 s390_j      (code, 10);
2970                 s390_llong  (code, 0x41e0000000000000);
2971                 s390_llong  (code, 0x41f0000000000000);
2972                 s390_ldr    (code, s390_f15, sreg);
2973                 s390_cdb    (code, s390_f15, 0, s390_r13, 0);
2974                 s390_jl     (code, 10);
2975                 s390_sdb    (code, s390_f15, 0, s390_r13, 8);
2976                 s390_cfdbr  (code, dreg, 7, s390_f15);
2977                 s390_j      (code, 4);
2978                 s390_cfdbr  (code, dreg, 5, sreg);
2979                 switch (size) {
2980                         case 1:
2981                                 s390_lhi  (code, s390_r0, 0xff);
2982                                 s390_nr   (code, dreg, s390_r0);
2983                                 break;
2984                         case 2:
2985                                 s390_lhi  (code, s390_r0, -1);
2986                                 s390_srl  (code, s390_r0, 0, 16);
2987                                 s390_nr   (code, dreg, s390_r0);
2988                                 break;
2989                 }
2990         }
2991         return code;
2992 }
2993
2994 /*========================= End of Function ========================*/
2995
2996 /*------------------------------------------------------------------*/
2997 /*                                                                  */
2998 /* Name         - mono_emit_stack_alloc                             */
2999 /*                                                                  */
3000 /* Function     -                                                   */
3001 /*                                                                  */
3002 /*------------------------------------------------------------------*/
3003
3004 static unsigned char*
3005 mono_emit_stack_alloc (guchar *code, MonoInst* tree)
3006 {
3007         return code;
3008 }
3009
3010 /*========================= End of Function ========================*/
3011
3012 /*------------------------------------------------------------------*/
3013 /*                                                                  */
3014 /* Name         - mono_arch_output_basic_block                      */
3015 /*                                                                  */
3016 /* Function     - Perform the "real" work of emitting instructions  */
3017 /*                that will do the work of in the basic block.      */
3018 /*                                                                  */
3019 /*------------------------------------------------------------------*/
3020
3021 void
3022 mono_arch_output_basic_block (MonoCompile *cfg, MonoBasicBlock *bb)
3023 {
3024         MonoInst *ins;
3025         MonoCallInst *call;
3026         guint offset;
3027         guint8 *code = cfg->native_code + cfg->code_len;
3028         MonoInst *last_ins = NULL;
3029         guint last_offset = 0;
3030         int max_len, cpos;
3031 guint8 cond;
3032
3033         if (cfg->opt & MONO_OPT_PEEPHOLE)
3034                 peephole_pass (cfg, bb);
3035
3036         /* we don't align basic blocks of loops on s390 */
3037
3038         if (cfg->verbose_level > 2)
3039                 g_print ("Basic block %d starting at offset 0x%x\n", bb->block_num, bb->native_offset);
3040
3041         cpos = bb->max_offset;
3042
3043         if (cfg->prof_options & MONO_PROFILE_COVERAGE) {
3044                 //MonoCoverageInfo *cov = mono_get_coverage_info (cfg->method);
3045                 //g_assert (!mono_compile_aot);
3046                 //cpos += 6;
3047                 //if (bb->cil_code)
3048                 //      cov->data [bb->dfn].iloffset = bb->cil_code - cfg->cil_code;
3049                 /* this is not thread save, but good enough */
3050                 /* fixme: howto handle overflows? */
3051                 //x86_inc_mem (code, &cov->data [bb->dfn].count);
3052         }
3053
3054         ins = bb->code;
3055         while (ins) {
3056                 offset = code - cfg->native_code;
3057
3058                 max_len = ((guint8 *)ins_spec [ins->opcode])[MONO_INST_LEN];
3059
3060                 if (offset > (cfg->code_size - max_len - 16)) {
3061                         cfg->code_size *= 2;
3062                         cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
3063                         code = cfg->native_code + offset;
3064                 }
3065
3066                 mono_debug_record_line_number (cfg, ins, offset);
3067
3068                 switch (ins->opcode) {
3069                 case OP_STOREI1_MEMBASE_IMM: {
3070                         s390_lhi (code, s390_r14, ins->inst_imm);
3071                         if (s390_is_uimm12(ins->inst_offset))
3072                                 s390_stc (code, s390_r14, 0, ins->inst_destbasereg, ins->inst_offset);
3073                         else {
3074                                 s390_basr (code, s390_r13, 0);
3075                                 s390_j    (code, 4);
3076                                 s390_word (code, ins->inst_offset);
3077                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3078                                 s390_stc  (code, s390_r14, s390_r13, ins->inst_destbasereg, 0);
3079                         }
3080                 }
3081                         break;
3082                 case OP_STOREI2_MEMBASE_IMM: {
3083                         s390_lhi (code, s390_r14, ins->inst_imm);
3084                         if (s390_is_uimm12(ins->inst_offset)) {
3085                                 s390_sth (code, s390_r14, 0, ins->inst_destbasereg, ins->inst_offset);
3086                         } else {
3087                                 s390_basr (code, s390_r13, 0);
3088                                 s390_j    (code, 4);
3089                                 s390_word (code, ins->inst_offset);
3090                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3091                                 s390_sth  (code, s390_r14, s390_r13, ins->inst_destbasereg, 0);
3092                         }
3093                 }
3094                         break;
3095                 case OP_STORE_MEMBASE_IMM:
3096                 case OP_STOREI4_MEMBASE_IMM: {
3097                         if (s390_is_imm16(ins->inst_imm)) {
3098                                 s390_lhi  (code, s390_r14, ins->inst_imm);
3099                         } else {
3100                                 s390_basr (code, s390_r13, 0);
3101                                 s390_j    (code, 4);
3102                                 s390_word (code, ins->inst_imm);
3103                                 s390_l    (code, s390_r14, 0, s390_r13, 4);
3104                         }
3105                         if (s390_is_uimm12(ins->inst_offset)) {
3106                                 s390_st  (code, s390_r14, 0, ins->inst_destbasereg, ins->inst_offset);
3107                         } else {
3108                                 s390_basr (code, s390_r13, 0);
3109                                 s390_j    (code, 4);
3110                                 s390_word (code, ins->inst_offset);
3111                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3112                                 s390_st   (code, s390_r14, s390_r13, ins->inst_destbasereg, 0);
3113                         }
3114                 }
3115                         break;
3116                 case OP_STOREI1_MEMBASE_REG: {
3117                         if (s390_is_uimm12(ins->inst_offset)) {
3118                                 s390_stc  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
3119                         } else {
3120                                 s390_basr (code, s390_r13, 0);
3121                                 s390_j    (code, 4);
3122                                 s390_word (code, ins->inst_offset);
3123                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3124                                 s390_stc  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
3125                         }
3126                 }
3127                         break;
3128                 case OP_STOREI2_MEMBASE_REG: {
3129                         if (s390_is_uimm12(ins->inst_offset)) {
3130                                 s390_sth  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
3131                         } else {
3132                                 s390_basr (code, s390_r13, 0);
3133                                 s390_j    (code, 4);
3134                                 s390_word (code, ins->inst_offset);
3135                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3136                                 s390_sth  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
3137                         }
3138                 }
3139                         break;
3140                 case OP_STORE_MEMBASE_REG:
3141                 case OP_STOREI4_MEMBASE_REG: {
3142                         if (s390_is_uimm12(ins->inst_offset)) {
3143                                 s390_st   (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
3144                         } else {
3145                                 s390_basr (code, s390_r13, 0);
3146                                 s390_j    (code, 4);
3147                                 s390_word (code, ins->inst_offset);
3148                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3149                                 s390_st   (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
3150                         }
3151                 }
3152                         break;
3153                 case CEE_LDIND_I:
3154                 case CEE_LDIND_I4:
3155                 case CEE_LDIND_U4: {
3156                         s390_basr (code, s390_r13, 0);
3157                         s390_j    (code, 4);
3158                         s390_word (code, ins->inst_p0);
3159                         s390_l    (code, s390_r13, 0, s390_r13, 4);
3160                         s390_l    (code, ins->dreg, 0, s390_r13, 0);
3161                 }
3162                         break;
3163                 case OP_LOADU4_MEM:
3164                         g_assert_not_reached ();
3165                         break;
3166                 case OP_LOAD_MEMBASE:
3167                 case OP_LOADI4_MEMBASE:
3168                 case OP_LOADU4_MEMBASE: {
3169                         if (s390_is_uimm12(ins->inst_offset))
3170                                 s390_l    (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
3171                         else {
3172                                 if (s390_is_imm16(ins->inst_offset)) {
3173                                         s390_lhi (code, s390_r13, ins->inst_offset);
3174                                         s390_l   (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
3175                                 } else {
3176                                         s390_basr (code, s390_r13, 0);
3177                                         s390_j    (code, 4);
3178                                         s390_word (code, ins->inst_offset);
3179                                         s390_l    (code, s390_r13, 0, s390_r13, 4);
3180                                         s390_l    (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
3181                                 }
3182                         }
3183                 }
3184                         break;
3185                 case OP_LOADU1_MEMBASE: {
3186                         s390_lhi (code, s390_r0, 0);
3187                         if (s390_is_uimm12(ins->inst_offset))
3188                                 s390_ic   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
3189                         else {
3190                                 s390_basr (code, s390_r13, 0);
3191                                 s390_j    (code, 4);
3192                                 s390_word (code, ins->inst_offset);
3193                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3194                                 s390_ic   (code, s390_r0, s390_r13, ins->inst_basereg, 0);
3195                         }
3196                         s390_lr   (code, ins->dreg, s390_r0);
3197                 }
3198                         break;
3199                 case OP_LOADI1_MEMBASE: {
3200                         s390_lhi (code, s390_r0, 0);
3201                         if (s390_is_uimm12(ins->inst_offset))
3202                                 s390_ic   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
3203                         else {
3204                                 s390_basr (code, s390_r13, 0);
3205                                 s390_j    (code, 4);
3206                                 s390_word (code, ins->inst_offset);
3207                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3208                                 s390_ic   (code, s390_r0, s390_r13, ins->inst_basereg, 0);
3209                         }
3210                         s390_lhi  (code, s390_r13, 0x80);
3211                         s390_nr   (code, s390_r13, s390_r0);
3212                         s390_jz   (code, 5);
3213                         s390_lhi  (code, s390_r13, 0xff00);
3214                         s390_or   (code, s390_r0, s390_r13);
3215                         s390_lr   (code, ins->dreg, s390_r0);
3216                 }
3217                         break;
3218                 case OP_LOADU2_MEMBASE: {
3219                         s390_lhi (code, s390_r0, 0);
3220                         if (s390_is_uimm12(ins->inst_offset))
3221                                 s390_icm  (code, s390_r0, 3, ins->inst_basereg, ins->inst_offset);
3222                         else {
3223                                 s390_basr (code, s390_r13, 0);
3224                                 s390_j    (code, 4);
3225                                 s390_word (code, ins->inst_offset);
3226                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3227                                 s390_ar   (code, s390_r13, ins->inst_basereg);
3228                                 s390_icm  (code, s390_r0, 3, s390_r13, 0);
3229                         }
3230                         s390_lr  (code, ins->dreg, s390_r0);
3231                 }
3232                         break;
3233                 case OP_LOADI2_MEMBASE: {
3234                         s390_lhi (code, s390_r0, 0);
3235                         if (s390_is_uimm12(ins->inst_offset))
3236                                 s390_lh   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
3237                         else {
3238                                 s390_basr (code, s390_r13, 0);
3239                                 s390_j    (code, 4);
3240                                 s390_word (code, ins->inst_offset);
3241                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3242                                 s390_lh   (code, s390_r0, s390_r13, ins->inst_basereg, 0);
3243                         }
3244                         s390_lr  (code, ins->dreg, s390_r0);
3245                 }
3246                         break;
3247                 case CEE_CONV_I1: {
3248                         s390_lhi  (code, s390_r0, 0x80);
3249                         if (ins->dreg != ins->sreg1) {
3250                                 s390_lr   (code, ins->dreg, ins->sreg1);
3251                         }
3252                         s390_nr   (code, s390_r0, ins->sreg1);
3253                         s390_jz   (code, 7);
3254                         s390_lhi  (code, s390_r13, -1);
3255                         s390_sll  (code, s390_r13, 0, 8);
3256                         s390_or   (code, ins->dreg, s390_r13);
3257                 }
3258                         break;
3259                 case CEE_CONV_I2: {
3260                         s390_lhi  (code, s390_r0, 0x80);
3261                         s390_sll  (code, s390_r0, 0, 8);
3262                         if (ins->dreg != ins->sreg1) {
3263                                 s390_lr   (code, ins->dreg, ins->sreg1);
3264                         }
3265                         s390_nr   (code, s390_r0, ins->sreg1);
3266                         s390_jz   (code, 7);
3267                         s390_lhi  (code, s390_r13, -1);
3268                         s390_sll  (code, s390_r13, 0, 16);
3269                         s390_or   (code, ins->dreg, s390_r13);
3270                 }
3271                         break;
3272                 case CEE_CONV_U1: {
3273                         s390_lhi  (code, s390_r0, 0xff);
3274                         if (ins->dreg != ins->sreg1) {
3275                                 s390_lr   (code, ins->dreg, ins->sreg1);
3276                         }
3277                         s390_nr   (code, ins->dreg, s390_r0);
3278                 }
3279                         break;
3280                 case CEE_CONV_U2: {
3281                         s390_lhi  (code, s390_r0, -1);
3282                         s390_sll  (code, s390_r0, 0, 16);
3283                         s390_srl  (code, s390_r0, 0, 16);
3284                         if (ins->dreg != ins->sreg1) {
3285                                 s390_lr   (code, ins->dreg, ins->sreg1);
3286                         }
3287                         s390_nr   (code, ins->dreg, s390_r0);
3288                 }
3289                         break;
3290                 case OP_COMPARE: {
3291                         if ((ins->next) &&
3292                             ((ins->next->opcode >= CEE_BNE_UN) &&
3293                              (ins->next->opcode <= CEE_BLT_UN)) ||
3294                             ((ins->next->opcode >= OP_COND_EXC_NE_UN) &&
3295                              (ins->next->opcode <= OP_COND_EXC_LT_UN)) ||
3296                             ((ins->next->opcode == OP_CLT_UN) ||
3297                              (ins->next->opcode == OP_CGT_UN)))
3298                                 s390_clr  (code, ins->sreg1, ins->sreg2);
3299                         else
3300                                 s390_cr   (code, ins->sreg1, ins->sreg2);
3301                 }
3302                         break;
3303                 case OP_COMPARE_IMM: {
3304                         if (s390_is_imm16 (ins->inst_imm)) {
3305                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3306                                 if ((ins->next) &&
3307                                     ((ins->next->opcode >= CEE_BNE_UN) &&
3308                                      (ins->next->opcode <= CEE_BLT_UN)) ||
3309                                     ((ins->next->opcode >= OP_COND_EXC_NE_UN) &&
3310                                      (ins->next->opcode <= OP_COND_EXC_LT_UN)) ||
3311                                     ((ins->next->opcode == OP_CLT_UN) ||
3312                                      (ins->next->opcode == OP_CGT_UN)))
3313                                         s390_clr  (code, ins->sreg1, s390_r0);
3314                                 else
3315                                         s390_cr   (code, ins->sreg1, s390_r0);
3316                         }
3317                         else {
3318                                 s390_basr (code, s390_r13, 0);
3319                                 s390_j    (code, 4);
3320                                 s390_word (code, ins->inst_imm);
3321                                 if ((ins->next) &&
3322                                     ((ins->next->opcode >= CEE_BNE_UN) &&
3323                                      (ins->next->opcode <= CEE_BLT_UN)) ||
3324                                     ((ins->next->opcode >= OP_COND_EXC_NE_UN) &&
3325                                      (ins->next->opcode <= OP_COND_EXC_LT_UN)) ||
3326                                     ((ins->next->opcode == OP_CLT_UN) &&
3327                                      (ins->next->opcode == OP_CGT_UN)))
3328                                         s390_cl   (code, ins->sreg1, 0, s390_r13, 4);
3329                                 else
3330                                         s390_c    (code, ins->sreg1, 0, s390_r13, 4);
3331                         }
3332                 }
3333                         break;
3334                 case OP_X86_TEST_NULL: {
3335                         s390_ltr (code, ins->sreg1, ins->sreg1);
3336                 }
3337                         break;
3338                 case CEE_BREAK: {
3339                         s390_break (code);
3340                 }
3341                         break;
3342                 case OP_ADDCC: {
3343                         if (ins->dreg != ins->sreg1) {
3344                                 s390_lr   (code, ins->dreg, ins->sreg1);
3345                         }
3346                         s390_alr  (code, ins->dreg, ins->sreg2);
3347                 }
3348                         break;
3349                 case CEE_ADD: {
3350                         if (ins->dreg != ins->sreg1) {
3351                                 s390_lr   (code, ins->dreg, ins->sreg1);
3352                         }
3353                         s390_ar   (code, ins->dreg, ins->sreg2);
3354                 }
3355                         break;
3356                 case OP_ADC: {
3357                         if (ins->dreg != ins->sreg1) {
3358                                 s390_lr   (code, ins->dreg, ins->sreg1);
3359                         }
3360                         s390_alcr (code, ins->dreg, ins->sreg2);
3361                 }
3362                         break;
3363                 case OP_ADDCC_IMM:
3364                 case OP_ADD_IMM: {
3365                         if ((ins->next) &&
3366                             (ins->next->opcode == OP_ADC_IMM)) {
3367                                 s390_basr (code, s390_r13, 0);
3368                                 s390_j    (code, 4);
3369                                 s390_word (code, ins->inst_imm);
3370                                 if (ins->dreg != ins->sreg1) {
3371                                         s390_lr   (code, ins->dreg, ins->sreg1);
3372                                 }
3373                                 s390_al   (code, ins->dreg, 0, s390_r13, 4);
3374                         } else {
3375                                 if (s390_is_imm16 (ins->inst_imm)) {
3376                                         if (ins->dreg != ins->sreg1) {
3377                                                 s390_lr   (code, ins->dreg, ins->sreg1);
3378                                         }
3379                                         s390_ahi (code, ins->dreg, ins->inst_imm);
3380                                 } else {
3381                                         s390_basr (code, s390_r13, 0);
3382                                         s390_j    (code, 4);
3383                                         s390_word (code, ins->inst_imm);
3384                                         if (ins->dreg != ins->sreg1) {
3385                                                 s390_lr   (code, ins->dreg, ins->sreg1);
3386                                         }
3387                                         s390_a    (code, ins->dreg, 0, s390_r13, 4);
3388                                 }
3389                         }
3390                 }
3391                         break;
3392                 case OP_ADC_IMM: {
3393                         if (s390_is_imm16 (ins->inst_imm)) {
3394                                 if (ins->dreg != ins->sreg1) {
3395                                         s390_lr   (code, ins->dreg, ins->sreg1);
3396                                 }
3397                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3398                                 s390_alcr (code, ins->dreg, s390_r0);
3399                         } else {
3400                                 s390_basr (code, s390_r13, 0);
3401                                 s390_j    (code, 4);
3402                                 s390_word (code, ins->inst_imm);
3403                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3404                                 s390_alcr (code, ins->dreg, s390_r13);
3405                         }
3406                 }
3407                         break;
3408                 case CEE_ADD_OVF: {
3409                         if (ins->dreg != ins->sreg1) {
3410                                 s390_lr   (code, ins->dreg, ins->sreg1);
3411                         }
3412                         s390_ar   (code, ins->dreg, ins->sreg2);
3413                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3414                 }
3415                         break;
3416                 case CEE_ADD_OVF_UN: {
3417                         if (ins->dreg != ins->sreg1) {
3418                                 s390_lr   (code, ins->dreg, ins->sreg1);
3419                         }
3420                         s390_alr  (code, ins->dreg, ins->sreg2);
3421                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
3422                 }
3423                         break;
3424                 case OP_ADD_OVF_CARRY: {
3425                         if (ins->dreg != ins->sreg1) {
3426                                 s390_lr   (code, ins->dreg, ins->sreg1);
3427                         }
3428                         s390_lhi  (code, s390_r0, 0);
3429                         s390_lr   (code, s390_r1, s390_r0);
3430                         s390_alcr (code, s390_r0, s390_r1);
3431                         s390_ar   (code, ins->dreg, ins->sreg2);
3432                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3433                         s390_ar   (code, ins->dreg, s390_r0);
3434                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3435                 }
3436                         break;
3437                 case OP_ADD_OVF_UN_CARRY: {
3438                         if (ins->dreg != ins->sreg1) {
3439                                 s390_lr   (code, ins->dreg, ins->sreg1);
3440                         }
3441                         s390_alcr (code, ins->dreg, ins->sreg2);
3442                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
3443                 }
3444                         break;
3445                 case OP_SUBCC: {
3446                         if (ins->dreg != ins->sreg1) {
3447                                 s390_lr   (code, ins->dreg, ins->sreg1);
3448                         }
3449                         s390_slr (code, ins->dreg, ins->sreg2);
3450                 }
3451                         break;
3452                 case CEE_SUB: {
3453                         if (ins->dreg != ins->sreg1) {
3454                                 s390_lr   (code, ins->dreg, ins->sreg1);
3455                         }
3456                         s390_sr   (code, ins->dreg, ins->sreg2);
3457                 }
3458                         break;
3459                 case OP_SBB: {
3460                         if (ins->dreg != ins->sreg1) {
3461                                 s390_lr   (code, ins->dreg, ins->sreg1);
3462                         }
3463                         s390_slbr (code, ins->dreg, ins->sreg2);
3464                 }
3465                         break;
3466                 case OP_SUBCC_IMM:
3467                 case OP_SUB_IMM: {
3468                         if (s390_is_imm16 (-ins->inst_imm)) {
3469                                 if (ins->dreg != ins->sreg1) {
3470                                         s390_lr   (code, ins->dreg, ins->sreg1);
3471                                 }
3472                                 s390_ahi  (code, ins->dreg, -ins->inst_imm);
3473                         } else {
3474                                 s390_basr (code, s390_r13, 0);
3475                                 s390_j    (code, 4);
3476                                 s390_word (code, ins->inst_imm);
3477                                 if (ins->dreg != ins->sreg1) {
3478                                         s390_lr   (code, ins->dreg, ins->sreg1);
3479                                 }
3480                                 s390_s    (code, ins->dreg, 0, s390_r13, 4);
3481                         }
3482                 }
3483                         break;
3484                 case OP_SBB_IMM: {
3485                         s390_basr (code, s390_r13, 0);
3486                         s390_j    (code, 4);
3487                         s390_word (code, ins->inst_imm);
3488                         s390_sl   (code, ins->dreg, 0, s390_r13, 4);
3489                 }
3490                         break;
3491                 case CEE_SUB_OVF: {
3492                         if (ins->dreg != ins->sreg1) {
3493                                 s390_lr   (code, ins->dreg, ins->sreg1);
3494                         }
3495                         s390_sr   (code, ins->dreg, ins->sreg2);
3496                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3497                 }
3498                         break;
3499                 case CEE_SUB_OVF_UN: {
3500                         if (ins->dreg != ins->sreg1) {
3501                                 s390_lr   (code, ins->dreg, ins->sreg1);
3502                         }
3503                         s390_slr  (code, ins->dreg, ins->sreg2);
3504                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
3505                 }
3506                         break;
3507                 case OP_SUB_OVF_CARRY: {
3508                         if (ins->dreg != ins->sreg1) {
3509                                 s390_lr   (code, ins->dreg, ins->sreg1);
3510                         }
3511                         s390_lhi  (code, s390_r0, 0);
3512                         s390_lr   (code, s390_r1, s390_r0);
3513                         s390_slbr (code, s390_r0, s390_r1);
3514                         s390_sr   (code, ins->dreg, ins->sreg2);
3515                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3516                         s390_ar   (code, ins->dreg, s390_r0);
3517                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3518                 }
3519                         break;
3520                 case OP_SUB_OVF_UN_CARRY: {
3521                         if (ins->dreg != ins->sreg1) {
3522                                 s390_lr   (code, ins->dreg, ins->sreg1);
3523                         }
3524                         s390_slbr (code, ins->dreg, ins->sreg2);
3525                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
3526                 }
3527                         break;
3528                 case CEE_AND: {
3529                         if (ins->sreg1 == ins->dreg) {
3530                                 s390_nr   (code, ins->dreg, ins->sreg2);
3531                         }
3532                         else {
3533                                 if (ins->sreg2 == ins->dreg) {
3534                                         s390_nr  (code, ins->dreg, ins->sreg1);
3535                                 }
3536                                 else {
3537                                         s390_lr  (code, ins->dreg, ins->sreg1);
3538                                         s390_nr  (code, ins->dreg, ins->sreg2);
3539                                 }
3540                         }
3541                 }
3542                         break;
3543                 case OP_AND_IMM: {
3544                         if (s390_is_imm16 (ins->inst_imm)) {
3545                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3546                                 if (ins->dreg != ins->sreg1) {
3547                                         s390_lr   (code, ins->dreg, ins->sreg1);
3548                                 }
3549                                 s390_nr   (code, ins->dreg, s390_r0);
3550                         } else {
3551                                 s390_basr (code, s390_r13, 0);
3552                                 s390_j    (code, 4);
3553                                 s390_word (code, ins->inst_imm);
3554                                 if (ins->dreg != ins->sreg1) {
3555                                         s390_lr   (code, ins->dreg, ins->sreg1);
3556                                 }
3557                                 s390_n    (code, ins->dreg, 0, s390_r13, 4);
3558                         }
3559                 }
3560                         break;
3561                 case CEE_DIV: {
3562                         s390_lr   (code, s390_r0, ins->sreg1);
3563                         s390_srda (code, s390_r0, 0, 32);
3564                         s390_dr   (code, s390_r0, ins->sreg2);
3565                         s390_lr   (code, ins->dreg, s390_r1);
3566                 }
3567                         break;
3568                 case CEE_DIV_UN: {
3569                         s390_lr   (code, s390_r0, ins->sreg1);
3570                         s390_srdl (code, s390_r0, 0, 32);
3571                         s390_dlr  (code, s390_r0, ins->sreg2);
3572                         s390_lr   (code, ins->dreg, s390_r1);
3573                 }
3574                         break;
3575                 case OP_DIV_IMM: {
3576                         if (s390_is_imm16 (ins->inst_imm)) {
3577                                 s390_lhi  (code, s390_r13, ins->inst_imm);
3578                                 s390_lr   (code, s390_r0, ins->sreg1);
3579                         } else {
3580                                 s390_basr (code, s390_r13, 0);
3581                                 s390_j    (code, 4);
3582                                 s390_word (code, ins->inst_imm);
3583                                 s390_lr   (code, s390_r0, ins->sreg1);
3584                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3585                         }
3586                         s390_srda (code, s390_r0, 0, 32);
3587                         s390_dr   (code, s390_r0, s390_r13);
3588                         s390_lr   (code, ins->dreg, s390_r1);
3589                 }
3590                         break;
3591                 case CEE_REM: {
3592                         s390_lr   (code, s390_r0, ins->sreg1);
3593                         s390_srda (code, s390_r0, 0, 32);
3594                         s390_dr   (code, s390_r0, ins->sreg2);
3595                         s390_lr   (code, ins->dreg, s390_r0);
3596                         break;
3597                 case CEE_REM_UN:
3598                         s390_lr   (code, s390_r0, ins->sreg1);
3599                         s390_srdl (code, s390_r0, 0, 32);
3600                         s390_dlr  (code, s390_r0, ins->sreg2);
3601                         s390_lr   (code, ins->dreg, s390_r0);
3602                 }
3603                         break;
3604                 case OP_REM_IMM: {
3605                         if (s390_is_imm16 (ins->inst_imm)) {
3606                                 s390_lhi  (code, s390_r13, ins->inst_imm);
3607                                 s390_lr   (code, s390_r0, ins->sreg1);
3608                         } else {
3609                                 s390_basr (code, s390_r13, 0);
3610                                 s390_j    (code, 4);
3611                                 s390_word (code, ins->inst_imm);
3612                                 s390_lr   (code, s390_r0, ins->sreg1);
3613                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3614                         }
3615                         s390_srda (code, s390_r0, 0, 32);
3616                         s390_dr   (code, s390_r0, s390_r13);
3617                         s390_lr   (code, ins->dreg, s390_r0);
3618                 }
3619                         break;
3620                 case CEE_OR: {
3621                         if (ins->sreg1 == ins->dreg) {
3622                                 s390_or   (code, ins->dreg, ins->sreg2);
3623                         }
3624                         else {
3625                                 if (ins->sreg2 == ins->dreg) {
3626                                         s390_or  (code, ins->dreg, ins->sreg1);
3627                                 }
3628                                 else {
3629                                         s390_lr  (code, ins->dreg, ins->sreg1);
3630                                         s390_or  (code, ins->dreg, ins->sreg2);
3631                                 }
3632                         }
3633                 }
3634                         break;
3635                 case OP_OR_IMM: {
3636                         if (s390_is_imm16 (ins->inst_imm)) {
3637                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3638                                 if (ins->dreg != ins->sreg1) {
3639                                         s390_lr   (code, ins->dreg, ins->sreg1);
3640                                 }
3641                                 s390_or   (code, ins->dreg, s390_r0);
3642                         } else {
3643                                 s390_basr (code, s390_r13, 0);
3644                                 s390_j    (code, 4);
3645                                 s390_word (code, ins->inst_imm);
3646                                 if (ins->dreg != ins->sreg1) {
3647                                         s390_lr   (code, ins->dreg, ins->sreg1);
3648                                 }
3649                                 s390_o    (code, ins->dreg, 0, s390_r13, 4);
3650                         }
3651                 }
3652                         break;
3653                 case CEE_XOR: {
3654                         if (ins->sreg1 == ins->dreg) {
3655                                 s390_xr   (code, ins->dreg, ins->sreg2);
3656                         }
3657                         else {
3658                                 if (ins->sreg2 == ins->dreg) {
3659                                         s390_xr  (code, ins->dreg, ins->sreg1);
3660                                 }
3661                                 else {
3662                                         s390_lr  (code, ins->dreg, ins->sreg1);
3663                                         s390_xr  (code, ins->dreg, ins->sreg2);
3664                                 }
3665                         }
3666                 }
3667                         break;
3668                 case OP_XOR_IMM: {
3669                         if (s390_is_imm16 (ins->inst_imm)) {
3670                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3671                                 if (ins->dreg != ins->sreg1) {
3672                                         s390_lr   (code, ins->dreg, ins->sreg1);
3673                                 }
3674                                 s390_xr   (code, ins->dreg, s390_r0);
3675                         } else {
3676                                 s390_basr (code, s390_r13, 0);
3677                                 s390_j    (code, 4);
3678                                 s390_word (code, ins->inst_imm);
3679                                 if (ins->dreg != ins->sreg1) {
3680                                         s390_lr   (code, ins->dreg, ins->sreg1);
3681                                 }
3682                                 s390_x    (code, ins->dreg, 0, s390_r13, 4);
3683                         }
3684                 }
3685                         break;
3686                 case CEE_SHL: {
3687                         if (ins->sreg1 != ins->dreg) {
3688                                 s390_lr   (code, ins->dreg, ins->sreg1);
3689                         }
3690                         s390_sll  (code, ins->dreg, ins->sreg2, 0);
3691                 }
3692                         break;
3693                 case OP_SHL_IMM: {
3694                         if (ins->sreg1 != ins->dreg) {
3695                                 s390_lr   (code, ins->dreg, ins->sreg1);
3696                         }
3697                         s390_sll  (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3698                 }
3699                         break;
3700                 case CEE_SHR: {
3701                         if (ins->sreg1 != ins->dreg) {
3702                                 s390_lr   (code, ins->dreg, ins->sreg1);
3703                         }
3704                         s390_sra  (code, ins->dreg, ins->sreg2, 0);
3705                 }
3706                         break;
3707                 case OP_SHR_IMM: {
3708                         if (ins->sreg1 != ins->dreg) {
3709                                 s390_lr   (code, ins->dreg, ins->sreg1);
3710                         }
3711                         s390_sra  (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3712                 }
3713                         break;
3714                 case OP_SHR_UN_IMM: {
3715                         if (ins->sreg1 != ins->dreg) {
3716                                 s390_lr   (code, ins->dreg, ins->sreg1);
3717                         }
3718                         s390_srl  (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3719                 }
3720                         break;
3721                 case CEE_SHR_UN: {
3722                         if (ins->sreg1 != ins->dreg) {
3723                                 s390_lr   (code, ins->dreg, ins->sreg1);
3724                         }
3725                         s390_srl  (code, ins->dreg, ins->sreg2, 0);
3726                 }
3727                         break;
3728                 case CEE_NOT: {
3729                         if (ins->sreg1 != ins->dreg) {
3730                                 s390_lr   (code, ins->dreg, ins->sreg1);
3731                         }
3732                         s390_lhi (code, s390_r0, -1);
3733                         s390_xr  (code, ins->dreg, s390_r0);
3734                 }
3735                         break;
3736                 case CEE_NEG: {
3737                         s390_lcr (code, ins->dreg, ins->sreg1);
3738                 }
3739                         break;
3740                 case CEE_MUL: {
3741                         if (ins->sreg1 == ins->dreg) {
3742                                 s390_msr  (code, ins->dreg, ins->sreg2);
3743                         }
3744                         else {
3745                                 if (ins->sreg2 == ins->dreg) {
3746                                         s390_msr (code, ins->dreg, ins->sreg1);
3747                                 }
3748                                 else {
3749                                         s390_lr  (code, ins->dreg, ins->sreg1);
3750                                         s390_msr (code, ins->dreg, ins->sreg2);
3751                                 }
3752                         }
3753                 }
3754                         break;
3755                 case OP_MUL_IMM: {
3756                         if (s390_is_imm16 (ins->inst_imm)) {
3757                                 s390_lhi  (code, s390_r13, ins->inst_imm);
3758                         } else {
3759                                 s390_basr (code, s390_r13, 0);
3760                                 s390_j    (code, 4);
3761                                 s390_word (code, ins->inst_imm);
3762                                 if (ins->dreg != ins->sreg1) {
3763                                         s390_lr   (code, ins->dreg, ins->sreg1);
3764                                 }
3765                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3766                         }
3767                         s390_msr  (code, ins->dreg, s390_r13);
3768                 }
3769                         break;
3770                 case CEE_MUL_OVF: {
3771                         short int *o[2];
3772                         s390_ltr  (code, s390_r1, ins->sreg1);
3773                         s390_jz   (code, 0); CODEPTR(code, o[0]);
3774                         s390_ltr  (code, s390_r0, ins->sreg2);
3775                         s390_jnz  (code, 6);
3776                         s390_lhi  (code, s390_r1, 0);
3777                         s390_j    (code, 0); CODEPTR(code, o[1]);
3778                         s390_xr   (code, s390_r0, s390_r1);
3779                         s390_msr  (code, s390_r1, ins->sreg2);
3780                         s390_xr   (code, s390_r0, s390_r1);
3781                         s390_srl  (code, s390_r0, 0, 31);
3782                         s390_ltr  (code, s390_r0, s390_r0);
3783                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3784                         PTRSLOT   (code, o[0]);
3785                         PTRSLOT   (code, o[1]);
3786                         s390_lr   (code, ins->dreg, s390_r1);
3787                 }
3788                         break;
3789                 case CEE_MUL_OVF_UN: {
3790                         s390_lhi  (code, s390_r0, 0);
3791                         s390_lr   (code, s390_r1, ins->sreg1);
3792                         s390_mlr  (code, s390_r0, ins->sreg2);
3793                         s390_ltr  (code, s390_r0, s390_r0);
3794                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3795                         s390_lr   (code, ins->dreg, s390_r1);
3796                 }
3797                         break;
3798                 case OP_LMUL: {
3799                         s390_l    (code, s390_r0, 0, ins->sreg1, 4);
3800                         s390_lr   (code, s390_r14, s390_r0);
3801                         s390_srda (code, s390_r0, 0, 32);
3802                         s390_m    (code, s390_r0, 0, ins->sreg2, 4);
3803                         s390_srl  (code, s390_r14, 0, 31);
3804                         s390_a    (code, s390_r14, 0, ins->sreg1, 0);
3805                         s390_l    (code, s390_r13, 0, ins->sreg2, 0);
3806                         s390_srl  (code, s390_r13, 0, 31);
3807                         s390_ms   (code, s390_r13, 0, ins->sreg1, 4);
3808                         s390_ar   (code, s390_r14, s390_r13);
3809                         s390_st   (code, s390_r14, 0, ins->dreg, 0);
3810                         s390_st   (code, s390_r1, 0, ins->dreg, 4);
3811                 }
3812                         break;
3813                 case OP_ICONST:
3814                 case OP_SETREGIMM: {
3815                         if (s390_is_imm16(ins->inst_c0)) {
3816                                 s390_lhi  (code, ins->dreg, ins->inst_c0);
3817                         } else {
3818                                 s390_basr (code, s390_r13, 0);
3819                                 s390_j    (code, 4);
3820                                 s390_word (code, ins->inst_c0);
3821                                 s390_l    (code, ins->dreg, 0, s390_r13, 4);
3822                         }
3823                 }
3824                         break;
3825                 case OP_AOTCONST: {
3826                         s390_basr (code, s390_r13, 0);
3827                         s390_j    (code, 4);
3828                         mono_add_patch_info (cfg, code - cfg->native_code,
3829                                 (MonoJumpInfoType)ins->inst_i1, ins->inst_p0);
3830                         s390_word (code, 0);
3831                         s390_l    (code,ins->dreg, 0, s390_r13, 4);
3832                 }
3833                         break;
3834                 case CEE_CONV_I4:
3835                 case CEE_CONV_U4:
3836                 case OP_MOVE:
3837                 case OP_SETREG: {
3838                         if (ins->dreg != ins->sreg1) {
3839                                 s390_lr (code, ins->dreg, ins->sreg1);
3840                         }
3841                 }
3842                         break;
3843                 case OP_SETLRET: {
3844                         int saved = ins->sreg1;
3845                         if (ins->sreg1 == s390_r2) {
3846                                 s390_lr (code, s390_r0, ins->sreg1);
3847                                 saved = s390_r0;
3848                         }
3849                         if (ins->sreg2 != s390_r2)
3850                                 s390_lr (code, s390_r2, ins->sreg2);
3851                         if (saved != s390_r3)
3852                                 s390_lr (code, s390_r3, saved);
3853                         break;
3854                 }
3855                 case OP_SETFREG:
3856                 case OP_FMOVE: {
3857                         if (ins->dreg != ins->sreg1) {
3858                                 s390_ldr   (code, ins->dreg, ins->sreg1);
3859                         }
3860                 }
3861                         break;
3862                 case OP_S390_SETF4RET: {
3863                         s390_ledbr (code, ins->dreg, ins->sreg1);
3864                 }
3865                         break;
3866                 case OP_FCONV_TO_R4: {
3867                         if ((ins->next) &&
3868                             (ins->next->opcode != OP_STORER4_MEMBASE_REG))
3869                                 s390_ledbr (code, ins->dreg, ins->sreg1);
3870                 }
3871                         break;
3872                 case CEE_JMP: {
3873                         int fParm;
3874                         if (cfg->method->save_lmf)
3875                                 code = restoreLMF(cfg, code);
3876
3877                         if (cfg->flags & MONO_CFG_HAS_TAIL) {
3878                                 s390_lm (code, s390_r2, s390_r5, STK_BASE,
3879                                          S390_PARM_SAVE_OFFSET);
3880                                 for (fParm = 0; fParm < 4; fParm++)
3881                                         s390_ld (code, fParm, 0, STK_BASE,
3882                                            S390_FLOAT_SAVE_OFFSET+fParm*sizeof(double));
3883                         }
3884
3885                         code = backUpStackPtr(cfg, code);
3886                         s390_l   (code, s390_r14, 0, STK_BASE, S390_RET_ADDR_OFFSET);
3887                         mono_add_patch_info (cfg, code - cfg->native_code,
3888                                              MONO_PATCH_INFO_METHOD_JUMP,
3889                                              ins->inst_p0);
3890                         s390_jcl (code, S390_CC_UN, 0);
3891                 }
3892                         break;
3893                 case OP_CHECK_THIS: {
3894                         /* ensure ins->sreg1 is not NULL */
3895                         s390_icm (code, s390_r0, 15, ins->sreg1, 0);
3896                 }
3897                         break;
3898                 case OP_ARGLIST: {
3899                         NOT_IMPLEMENTED("OP_ARGLIST");
3900                         s390_basr (code, s390_r13, 0);
3901                         s390_j    (code, 4);
3902                         s390_word (code, cfg->sig_cookie);
3903                         s390_mvc  (code, 4, ins->sreg1, 0, s390_r13, 4);
3904                 }
3905                         break;
3906                 case OP_FCALL: {
3907                         call = (MonoCallInst*)ins;
3908                         if (ins->flags & MONO_INST_HAS_METHOD)
3909                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_METHOD,
3910                                                      call->method);
3911                         else
3912                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS,
3913                                                      call->fptr);
3914                         s390_brasl (code, s390_r14, 0);
3915                         if (call->signature->ret->type == MONO_TYPE_R4)
3916                                 s390_ldebr (code, s390_f0, s390_f0);
3917                 }
3918                         break;
3919                 case OP_LCALL:
3920                 case OP_VCALL:
3921                 case OP_VOIDCALL:
3922                 case CEE_CALL: {
3923                         call = (MonoCallInst*)ins;
3924                         if (ins->flags & MONO_INST_HAS_METHOD)
3925                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_METHOD, call->method);
3926                         else
3927                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS, call->fptr);
3928                         s390_brasl (code, s390_r14, 0);
3929                 }
3930                         break;
3931                 case OP_FCALL_REG: {
3932                         call = (MonoCallInst*)ins;
3933                         s390_lr   (code, s390_r1, ins->sreg1);
3934                         s390_basr (code, s390_r14, s390_r1);
3935                         if (call->signature->ret->type == MONO_TYPE_R4)
3936                                 s390_ldebr (code, s390_f0, s390_f0);
3937                 }
3938                         break;
3939                 case OP_LCALL_REG:
3940                 case OP_VCALL_REG:
3941                 case OP_VOIDCALL_REG:
3942                 case OP_CALL_REG: {
3943                         s390_lr   (code, s390_r1, ins->sreg1);
3944                         s390_basr (code, s390_r14, s390_r1);
3945                 }
3946                         break;
3947                 case OP_FCALL_MEMBASE: {
3948                         call = (MonoCallInst*)ins;
3949                         s390_l    (code, s390_r1, 0, ins->sreg1, ins->inst_offset);
3950                         s390_basr (code, s390_r14, s390_r1);
3951                         if (call->signature->ret->type == MONO_TYPE_R4)
3952                                 s390_ldebr (code, s390_f0, s390_f0);
3953                 }
3954                         break;
3955                 case OP_LCALL_MEMBASE:
3956                 case OP_VCALL_MEMBASE:
3957                 case OP_VOIDCALL_MEMBASE:
3958                 case OP_CALL_MEMBASE: {
3959                         s390_l    (code, s390_r1, 0, ins->sreg1, ins->inst_offset);
3960                         s390_basr (code, s390_r14, s390_r1);
3961                 }
3962                         break;
3963                 case OP_OUTARG:
3964                         g_assert_not_reached ();
3965                         break;
3966                 case OP_LOCALLOC: {
3967                         int alloca_skip = S390_MINIMAL_STACK_SIZE + cfg->param_area +
3968                                           S390_STACK_ALIGNMENT - 1;
3969                         int area_offset = S390_ALIGN(alloca_skip, S390_STACK_ALIGNMENT);
3970                         s390_lr   (code, s390_r1, ins->sreg1);
3971                         s390_ahi  (code, s390_r1, 14);
3972                         s390_srl  (code, s390_r1, 0, 3);
3973                         s390_sll  (code, s390_r1, 0, 3);
3974                         s390_l    (code, s390_r13, 0, STK_BASE, 0);
3975                         s390_lcr  (code, s390_r1, s390_r1);
3976                         s390_la   (code, STK_BASE, STK_BASE, s390_r1, 0);
3977                         s390_st   (code, s390_r13, 0, STK_BASE, 0);
3978                         s390_la   (code, ins->dreg, 0, STK_BASE, area_offset);
3979                         s390_srl  (code, ins->dreg, 0, 3);
3980                         s390_sll  (code, ins->dreg, 0, 3);
3981                 }
3982                         break;
3983                 case CEE_RET: {
3984                         s390_br  (code, s390_r14);
3985                 }
3986                         break;
3987                 case CEE_THROW: {
3988                         s390_lr (code, s390_r2, ins->sreg1);
3989                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD,
3990                                              (gpointer)"mono_arch_throw_exception");
3991                         s390_brasl (code, s390_r14, 0);
3992                 }
3993                         break;
3994                 case OP_START_HANDLER: {
3995                         if (s390_is_uimm12 (ins->inst_left->inst_offset)) {
3996                                 s390_st   (code, s390_r14, 0,
3997                                            ins->inst_left->inst_basereg,
3998                                            ins->inst_left->inst_offset);
3999                         } else {
4000                                 s390_basr (code, s390_r13, 0);
4001                                 s390_j    (code, 4);
4002                                 s390_word (code, ins->inst_left->inst_offset);
4003                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
4004                                 s390_st   (code, s390_r14, s390_r13,
4005                                            ins->inst_left->inst_basereg, 0);
4006                         }
4007                 }
4008                         break;
4009                 case OP_ENDFILTER: {
4010                         if (ins->sreg1 != s390_r2)
4011                                 s390_lr (code, s390_r2, ins->sreg1);
4012                         if (s390_is_uimm12 (ins->inst_left->inst_offset)) {
4013                                 s390_l  (code, s390_r14, 0, ins->inst_left->inst_basereg,
4014                                          ins->inst_left->inst_offset);
4015                         } else {
4016                                 s390_basr (code, s390_r13, 0);
4017                                 s390_j    (code, 4);
4018                                 s390_word (code, ins->inst_left->inst_offset);
4019                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
4020                                 s390_l    (code, s390_r14, s390_r13,
4021                                            ins->inst_left->inst_basereg, 0);
4022                         }
4023                         s390_br  (code, s390_r14);
4024                 }
4025                         break;
4026                 case CEE_ENDFINALLY: {
4027                         if (s390_is_uimm12 (ins->inst_left->inst_offset)) {
4028                                 s390_l  (code, s390_r14, 0, ins->inst_left->inst_basereg,
4029                                          ins->inst_left->inst_offset);
4030                         } else {
4031                                 s390_basr (code, s390_r13, 0);
4032                                 s390_j    (code, 4);
4033                                 s390_word (code, ins->inst_left->inst_offset);
4034                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
4035                                 s390_l    (code, s390_r14, s390_r13,
4036                                            ins->inst_left->inst_basereg, 0);
4037                         }
4038                         s390_br  (code, s390_r14);
4039                 }
4040                         break;
4041                 case OP_CALL_HANDLER: {
4042                         mono_add_patch_info (cfg, code-cfg->native_code,
4043                                              MONO_PATCH_INFO_BB, ins->inst_target_bb);
4044                         s390_brasl (code, s390_r14, 0);
4045                 }
4046                         break;
4047                 case OP_LABEL: {
4048                         ins->inst_c0 = code - cfg->native_code;
4049                 }
4050                         break;
4051                 case CEE_BR:
4052                         EMIT_UNCOND_BRANCH(ins);
4053                         break;
4054                 case OP_BR_REG: {
4055                         s390_br  (code, ins->sreg1);
4056                 }
4057                         break;
4058                 case OP_CEQ: {
4059                         s390_lhi (code, ins->dreg, 1);
4060                         s390_jz  (code, 4);
4061                         s390_lhi (code, ins->dreg, 0);
4062                 }
4063                         break;
4064                 case OP_CLT: {
4065                         s390_lhi (code, ins->dreg, 1);
4066                         s390_jl  (code, 4);
4067                         s390_lhi (code, ins->dreg, 0);
4068                 }
4069                         break;
4070                 case OP_CLT_UN: {
4071                         s390_lhi (code, ins->dreg, 1);
4072                         s390_jlo (code, 4);
4073                         s390_lhi (code, ins->dreg, 0);
4074                 }
4075                         break;
4076                 case OP_CGT: {
4077                         s390_lhi (code, ins->dreg, 1);
4078                         s390_jh  (code, 4);
4079                         s390_lhi (code, ins->dreg, 0);
4080                 }
4081                         break;
4082                 case OP_CGT_UN: {
4083                         s390_lhi (code, ins->dreg, 1);
4084                         s390_jho (code, 4);
4085                         s390_lhi (code, ins->dreg, 0);
4086                 }
4087                         break;
4088                 case OP_COND_EXC_EQ:
4089                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_EQ, ins->inst_p1);
4090                         break;
4091                 case OP_COND_EXC_NE_UN:
4092                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NE, ins->inst_p1);
4093                         break;
4094                 case OP_COND_EXC_LT:
4095                 case OP_COND_EXC_LT_UN:
4096                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, ins->inst_p1);
4097                         break;
4098                 case OP_COND_EXC_GT:
4099                 case OP_COND_EXC_GT_UN:
4100                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GT, ins->inst_p1);
4101                         break;
4102                 case OP_COND_EXC_GE:
4103                 case OP_COND_EXC_GE_UN:
4104                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GE, ins->inst_p1);
4105                         break;
4106                 case OP_COND_EXC_LE:
4107                 case OP_COND_EXC_LE_UN:
4108                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LE, ins->inst_p1);
4109                         break;
4110                 case OP_COND_EXC_OV:
4111                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, ins->inst_p1);
4112                         break;
4113                 case OP_COND_EXC_NO:
4114                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NO, ins->inst_p1);
4115                         break;
4116                 case OP_COND_EXC_C:
4117                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, ins->inst_p1);
4118                         break;
4119                 case OP_COND_EXC_NC:
4120                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, ins->inst_p1);
4121                         break;
4122                 case CEE_BEQ:
4123                         EMIT_COND_BRANCH (ins, S390_CC_EQ);
4124                         break;
4125                 case CEE_BNE_UN:
4126                         EMIT_COND_BRANCH (ins, S390_CC_NE);
4127                         break;
4128                 case CEE_BLT:
4129                 case CEE_BLT_UN:
4130                         EMIT_COND_BRANCH (ins, S390_CC_LT);
4131                         break;
4132                 case CEE_BGT:
4133                 case CEE_BGT_UN:
4134                         EMIT_COND_BRANCH (ins, S390_CC_GT);
4135                         break;
4136                 case CEE_BGE:
4137                 case CEE_BGE_UN:
4138                         EMIT_COND_BRANCH (ins, S390_CC_GE);
4139                         break;
4140                 case CEE_BLE:
4141                 case CEE_BLE_UN:
4142                         EMIT_COND_BRANCH (ins, S390_CC_LE);
4143                         break;
4144
4145                 /* floating point opcodes */
4146                 case OP_R8CONST: {
4147                         if (*((float *) ins->inst_p0) == 0) {
4148                                 s390_lzdr (code, ins->dreg);
4149                         } else {
4150                                 s390_basr  (code, s390_r13, 0);
4151                                 s390_j     (code, 4);
4152                                 s390_word  (code, ins->inst_p0);
4153                                 s390_l     (code, s390_r13, 0, s390_r13, 4);
4154                                 s390_ld    (code, ins->dreg, 0, s390_r13, 0);
4155                         }
4156                 }
4157                         break;
4158                 case OP_R4CONST: {
4159                         if (*((float *) ins->inst_p0) == 0) {
4160                                 s390_lzdr (code, ins->dreg);
4161                         } else {
4162                                 s390_basr (code, s390_r13, 0);
4163                                 s390_j    (code, 4);
4164                                 s390_word (code, ins->inst_p0);
4165                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
4166                                 s390_ldeb (code, ins->dreg, 0, s390_r13, 0);
4167                         }
4168                 }
4169                         break;
4170                 case OP_STORER8_MEMBASE_REG: {
4171                         if (s390_is_uimm12(ins->inst_offset)) {
4172                                 s390_std  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
4173                         } else {
4174                                 s390_basr (code, s390_r13, 0);
4175                                 s390_j    (code, 4);
4176                                 s390_word (code, ins->inst_offset);
4177                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
4178                                 s390_std  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
4179                         }
4180                 }
4181                         break;
4182                 case OP_LOADR8_MEMBASE: {
4183                         if (s390_is_uimm12(ins->inst_offset)) {
4184                                 s390_ld   (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
4185                         } else {
4186                                 s390_basr (code, s390_r13, 0);
4187                                 s390_j    (code, 4);
4188                                 s390_word (code, ins->inst_offset);
4189                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
4190                                 s390_ld   (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
4191                         }
4192                 }
4193                         break;
4194                 case OP_STORER4_MEMBASE_REG: {
4195                         if (s390_is_uimm12(ins->inst_offset)) {
4196                                 s390_ledbr(code, s390_f15, ins->sreg1);
4197                                 s390_ste  (code, s390_f15, 0, ins->inst_destbasereg, ins->inst_offset);
4198                         } else {
4199                                 s390_basr (code, s390_r13, 0);
4200                                 s390_j    (code, 4);
4201                                 s390_word (code, ins->inst_offset);
4202                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
4203                                 s390_ledbr(code, s390_f15, ins->sreg1);
4204                                 s390_ste  (code, s390_f15, s390_r13, ins->inst_destbasereg, 0);
4205                         }
4206                 }
4207                         break;
4208                 case OP_LOADR4_MEMBASE: {
4209                         if (s390_is_uimm12(ins->inst_offset)) {
4210                                 s390_ldeb (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
4211                         } else {
4212                                 s390_basr (code, s390_r13, 0);
4213                                 s390_j    (code, 4);
4214                                 s390_word (code, ins->inst_offset);
4215                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
4216                                 s390_ldeb (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
4217                         }
4218                 }
4219                         break;
4220                 case CEE_CONV_R_UN: {
4221                         s390_cdfbr (code, ins->dreg, ins->sreg1);
4222                         s390_ltr   (code, ins->sreg1, ins->sreg1);
4223                         s390_jnl   (code, 12);
4224                         s390_basr  (code, s390_r13, 0);
4225                         s390_j     (code, 6);
4226                         s390_word  (code, 0x41f00000);
4227                         s390_word  (code, 0);
4228                         s390_adb   (code, ins->dreg, 0, s390_r13, 4);
4229                 }
4230                         break;
4231                 case CEE_CONV_R4: {
4232                         s390_cdfbr (code, ins->dreg, ins->sreg1);
4233                 }
4234                         break;
4235                 case CEE_CONV_R8: {
4236                         s390_cdfbr (code, ins->dreg, ins->sreg1);
4237                 }
4238                         break;
4239                 case OP_FCONV_TO_I1:
4240                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 1, TRUE);
4241                         break;
4242                 case OP_FCONV_TO_U1:
4243                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 1, FALSE);
4244                         break;
4245                 case OP_FCONV_TO_I2:
4246                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 2, TRUE);
4247                         break;
4248                 case OP_FCONV_TO_U2:
4249                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 2, FALSE);
4250                         break;
4251                 case OP_FCONV_TO_I4:
4252                 case OP_FCONV_TO_I:
4253                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 4, TRUE);
4254                         break;
4255                 case OP_FCONV_TO_U4:
4256                 case OP_FCONV_TO_U:
4257                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 4, FALSE);
4258                         break;
4259                 case OP_FCONV_TO_I8:
4260                 case OP_FCONV_TO_U8:
4261                         g_assert_not_reached ();
4262                         /* Implemented as helper calls */
4263                         break;
4264                 case OP_LCONV_TO_R_UN:
4265                         g_assert_not_reached ();
4266                         /* Implemented as helper calls */
4267                         break;
4268                 case OP_LCONV_TO_OVF_I: {
4269                         /* Valid ints: 0xffffffff:8000000 to 00000000:0x7f000000 */
4270                         short int *o[5];
4271                         s390_ltr  (code, ins->sreg2, ins->sreg2);
4272                         s390_jnl  (code, 0); CODEPTR(code, o[0]);
4273                         s390_ltr  (code, ins->sreg1, ins->sreg1);
4274                         s390_jnl  (code, 0); CODEPTR(code, o[1]);
4275                         s390_lhi  (code, s390_r13, -1);
4276                         s390_cr   (code, ins->sreg1, s390_r13);
4277                         s390_jnz  (code, 0); CODEPTR(code, o[2]);
4278                         if (ins->dreg != ins->sreg2)
4279                                 s390_lr   (code, ins->dreg, ins->sreg2);
4280                         s390_j    (code, 0); CODEPTR(code, o[3]);
4281                         PTRSLOT(code, o[0]);
4282                         s390_jz   (code, 0); CODEPTR(code, o[4]);
4283                         PTRSLOT(code, o[1]);
4284                         PTRSLOT(code, o[2]);
4285                         mono_add_patch_info (cfg, code - cfg->native_code,
4286                                              MONO_PATCH_INFO_EXC, "OverflowException");
4287                         s390_brasl (code, s390_r14, 0);
4288                         PTRSLOT(code, o[3]);
4289                         PTRSLOT(code, o[4]);
4290                 }
4291                         break;
4292                 case OP_SQRT: {
4293                         s390_sqdbr (code, ins->dreg, ins->sreg1);
4294                 }
4295                         break;
4296                 case OP_FADD: {
4297                         if (ins->dreg == ins->sreg1)
4298                                 s390_adbr (code, ins->dreg, ins->sreg2);
4299                         else {
4300                                 if (ins->dreg == ins->sreg2)
4301                                         s390_adbr (code, ins->dreg, ins->sreg1);
4302                                 else {
4303                                         s390_ldr  (code, ins->dreg, ins->sreg1);
4304                                         s390_adbr (code, ins->dreg, ins->sreg2);
4305                                 }
4306                         }
4307                 }
4308                         break;
4309                 case OP_FSUB: {
4310                         if (ins->dreg == ins->sreg1)
4311                                 s390_sdbr (code, ins->dreg, ins->sreg2);
4312                         else {
4313                                 s390_ldr  (code, ins->dreg, ins->sreg1);
4314                                 s390_sdbr (code, ins->dreg, ins->sreg2);
4315                         }
4316                 }
4317                         break;
4318                 case OP_FMUL: {
4319                         if (ins->dreg == ins->sreg1)
4320                                 s390_mdbr (code, ins->dreg, ins->sreg2);
4321                         else {
4322                                 if (ins->dreg == ins->sreg2)
4323                                         s390_mdbr (code, ins->dreg, ins->sreg1);
4324                                 else {
4325                                         s390_ldr  (code, ins->dreg, ins->sreg1);
4326                                         s390_mdbr (code, ins->dreg, ins->sreg2);
4327                                 }
4328                         }
4329                 }
4330                         break;
4331                 case OP_FDIV: {
4332                         if (ins->dreg == ins->sreg1)
4333                                 s390_ddbr (code, ins->dreg, ins->sreg2);
4334                         else {
4335                                 s390_ldr  (code, ins->dreg, ins->sreg1);
4336                                 s390_ddbr (code, ins->dreg, ins->sreg2);
4337                         }
4338                 }
4339                         break;
4340                 case OP_FNEG: {
4341                         s390_lcdbr (code, ins->dreg, ins->sreg1);
4342                 }
4343                         break;
4344                 case OP_FREM: {
4345                         if (ins->dreg != ins->sreg1) {
4346                                 s390_ldr  (code, ins->dreg, ins->sreg1);
4347                         }
4348                         s390_didbr (code, ins->dreg, ins->sreg2, 5, s390_f15);
4349                 }
4350                         break;
4351                 case OP_FCOMPARE: {
4352                         s390_cdbr (code, ins->sreg1, ins->sreg2);
4353                 }
4354                         break;
4355                 case OP_FCEQ: {
4356                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4357                         s390_lhi   (code, ins->dreg, 1);
4358                         s390_je    (code, 4);
4359                         s390_lhi   (code, ins->dreg, 0);
4360                 }
4361                         break;
4362                 case OP_FCLT: {
4363                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4364                         s390_lhi   (code, ins->dreg, 1);
4365                         s390_jl    (code, 4);
4366                         s390_lhi   (code, ins->dreg, 0);
4367                 }
4368                         break;
4369                 case OP_FCLT_UN: {
4370                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4371                         s390_lhi   (code, ins->dreg, 1);
4372                         s390_jlo   (code, 4);
4373                         s390_lhi   (code, ins->dreg, 0);
4374                 }
4375                         break;
4376                 case OP_FCGT: {
4377                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4378                         s390_lhi   (code, ins->dreg, 1);
4379                         s390_jh    (code, 4);
4380                         s390_lhi   (code, ins->dreg, 0);
4381                 }
4382                         break;
4383                 case OP_FCGT_UN: {
4384                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4385                         s390_lhi   (code, ins->dreg, 1);
4386                         s390_jho   (code, 4);
4387                         s390_lhi   (code, ins->dreg, 0);
4388                 }
4389                         break;
4390                 case OP_FBEQ:
4391                         EMIT_COND_BRANCH (ins, S390_CC_EQ|S390_CC_OV);
4392                         break;
4393                 case OP_FBNE_UN:
4394                         EMIT_COND_BRANCH (ins, S390_CC_NE|S390_CC_OV);
4395                         break;
4396                 case OP_FBLT:
4397                         EMIT_COND_BRANCH (ins, S390_CC_LT);
4398                         break;
4399                 case OP_FBLT_UN:
4400                         EMIT_COND_BRANCH (ins, S390_CC_LT|S390_CC_OV);
4401                         break;
4402                 case OP_FBGT:
4403                         EMIT_COND_BRANCH (ins, S390_CC_GT);
4404                         break;
4405                 case OP_FBGT_UN:
4406                         EMIT_COND_BRANCH (ins, S390_CC_GT|S390_CC_OV);
4407                         break;
4408                 case OP_FBGE:
4409                         EMIT_COND_BRANCH (ins, S390_CC_GE);
4410                         break;
4411                 case OP_FBGE_UN:
4412                         EMIT_COND_BRANCH (ins, S390_CC_GE|S390_CC_OV);
4413                         break;
4414                 case OP_FBLE:
4415                         EMIT_COND_BRANCH (ins, S390_CC_LE);
4416                         break;
4417                 case OP_FBLE_UN:
4418                         EMIT_COND_BRANCH (ins, S390_CC_LE|S390_CC_OV);
4419                         break;
4420                 case CEE_CKFINITE: {
4421                         short *o;
4422                         s390_lhi  (code, s390_r13, 0x7f);
4423                         s390_tcdb (code, ins->sreg1, 0, s390_r13, 0);
4424                         s390_jz   (code, 0); CODEPTR(code, o);
4425                         mono_add_patch_info (cfg, code - cfg->native_code,
4426                                              MONO_PATCH_INFO_EXC, "ArithmeticException");
4427                         s390_brasl (code, s390_r14,0);
4428                         PTRSLOT(code, o);
4429                 }
4430                         break;
4431                 case OP_S390_MOVE: {
4432                         if (ins->unused > 0) {
4433                                 if (ins->unused <= 256) {
4434                                         s390_mvc  (code, ins->unused, ins->dreg,
4435                                                    ins->inst_offset, ins->sreg1, ins->inst_imm);
4436                                 } else {
4437                                         s390_lr   (code, s390_r0, ins->dreg);
4438                                         if (s390_is_imm16 (ins->inst_offset)) {
4439                                                 s390_ahi  (code, s390_r0, ins->inst_offset);
4440                                         } else {
4441                                                 s390_basr (code, s390_r13, 0);
4442                                                 s390_j    (code, 4);
4443                                                 s390_word (code, ins->inst_offset);
4444                                                 s390_a    (code, s390_r0, 0, s390_r13, 4);
4445                                         }
4446                                         s390_lr   (code, s390_r12, ins->sreg1);
4447                                         if (s390_is_imm16 (ins->inst_imm)) {
4448                                                 s390_ahi  (code, s390_r12, ins->inst_imm);
4449                                         } else {
4450                                                 s390_basr (code, s390_r13, 0);
4451                                                 s390_j    (code, 4);
4452                                                         s390_word (code, ins->inst_imm);
4453                                                 s390_a    (code, s390_r12, 0, s390_r13, 4);
4454                                         }
4455                                         s390_lr   (code, s390_r1, ins->sreg1);
4456                                         s390_lr   (code, s390_r13, s390_r1);
4457                                         s390_mvcle(code, s390_r0, s390_r12, 0, 0);
4458                                         s390_jo   (code, -2);
4459                                 }
4460                         }
4461                 }
4462                         break;
4463                 default:
4464                         g_warning ("unknown opcode %s in %s()\n", mono_inst_name (ins->opcode), __FUNCTION__);
4465                         g_assert_not_reached ();
4466                 }
4467
4468                 if ((cfg->opt & MONO_OPT_BRANCH) && ((code - cfg->native_code - offset) > max_len)) {
4469                         g_warning ("wrong maximal instruction length of instruction %s (expected %d, got %d)",
4470                                    mono_inst_name (ins->opcode), max_len, code - cfg->native_code - offset);
4471                         g_assert_not_reached ();
4472                 }
4473
4474                 cpos += max_len;
4475
4476                 last_ins = ins;
4477                 last_offset = offset;
4478
4479                 ins = ins->next;
4480         }
4481
4482         cfg->code_len = code - cfg->native_code;
4483 }
4484
4485 /*========================= End of Function ========================*/
4486
4487 /*------------------------------------------------------------------*/
4488 /*                                                                  */
4489 /* Name         - mono_arch_register_lowlevel_calls                 */
4490 /*                                                                  */
4491 /* Function     - Register routines to help with --trace operation. */
4492 /*                                                                  */
4493 /*------------------------------------------------------------------*/
4494
4495 void
4496 mono_arch_register_lowlevel_calls (void)
4497 {
4498         mono_register_jit_icall (enter_method, "mono_enter_method", NULL, TRUE);
4499         mono_register_jit_icall (leave_method, "mono_leave_method", NULL, TRUE);
4500 }
4501
4502 /*========================= End of Function ========================*/
4503
4504 /*------------------------------------------------------------------*/
4505 /*                                                                  */
4506 /* Name         - mono_arch_patch_code                              */
4507 /*                                                                  */
4508 /* Function     - Process the patch data created during the         */
4509 /*                instruction build process. This resolves jumps,   */
4510 /*                calls, variables etc.                             */
4511 /*                                                                  */
4512 /*------------------------------------------------------------------*/
4513
4514 void
4515 mono_arch_patch_code (MonoMethod *method, MonoDomain *domain, guint8 *code, MonoJumpInfo *ji, gboolean run_cctors)
4516 {
4517         MonoJumpInfo *patch_info;
4518
4519         for (patch_info = ji; patch_info; patch_info = patch_info->next) {
4520                 unsigned char *ip = patch_info->ip.i + code;
4521                 gint32 target = 0;
4522
4523                 switch (patch_info->type) {
4524                 case MONO_PATCH_INFO_BB:
4525                         target = S390_RELATIVE((patch_info->data.bb->native_offset+code),
4526                                                ip);
4527                         ip    += 2;     /* Skip over op-code */
4528                         break;
4529                 case MONO_PATCH_INFO_ABS:
4530                         target = S390_RELATIVE(patch_info->data.target, ip);
4531                         ip    += 2;     /* Skip over op-code */
4532                         break;
4533                 case MONO_PATCH_INFO_LABEL:
4534                         target = S390_RELATIVE((patch_info->data.inst->inst_c0+code),ip);
4535                         ip    += 2;     /* Skip over op-code */
4536                         break;
4537                 case MONO_PATCH_INFO_IP:
4538                         target = ip;
4539                         continue;
4540                 case MONO_PATCH_INFO_METHOD_REL:
4541                         g_assert_not_reached ();
4542                         *((gpointer *)(ip)) = code + patch_info->data.offset;
4543                         continue;
4544                 case MONO_PATCH_INFO_INTERNAL_METHOD: {
4545                         MonoJitICallInfo *mi = mono_find_jit_icall_by_name (patch_info->data.name);
4546                         if (!mi) {
4547                                 g_warning ("unknown MONO_PATCH_INFO_INTERNAL_METHOD %s", patch_info->data.name);
4548                                 g_assert_not_reached ();
4549                         }
4550                         target = S390_RELATIVE(mono_icall_get_wrapper (mi), ip);
4551                         ip    += 2;     /* Skip over op-code */
4552                         break;
4553                 }
4554                 case MONO_PATCH_INFO_METHOD_JUMP: {
4555                         GSList *list;
4556
4557                         /*------------------------------------------------------*/
4558                         /* get the trampoline to the method from the domain     */
4559                         /*------------------------------------------------------*/
4560                         target = mono_create_jump_trampoline (domain,
4561                                                       patch_info->data.method,
4562                                                       TRUE);
4563                         target = S390_RELATIVE(target, ip);
4564                         if (!domain->jump_target_hash)
4565                                 domain->jump_target_hash = g_hash_table_new (NULL, NULL);
4566                         list = g_hash_table_lookup (domain->jump_target_hash,
4567                                                     patch_info->data.method);
4568                         list = g_slist_prepend (list, ip);
4569                         g_hash_table_insert (domain->jump_target_hash,
4570                                              patch_info->data.method, list);
4571                         ip  +=2;
4572                         break;
4573                 }
4574                 case MONO_PATCH_INFO_METHOD:
4575                         if (patch_info->data.method == method) {
4576                                 target = S390_RELATIVE(code, ip);
4577                         } else {
4578                                 /* get the trampoline to the method from the domain */
4579                                 target = S390_RELATIVE(mono_arch_create_jit_trampoline (patch_info->data.method), ip);
4580                                 target = mono_arch_create_jit_trampoline(patch_info->data.method);
4581                                 target = S390_RELATIVE(target, ip);
4582                         }
4583                         ip    += 2;     /* Skip over op-code */
4584                         break;
4585                 case MONO_PATCH_INFO_SWITCH: {
4586                         gpointer *table = (gpointer *)patch_info->data.target;
4587                         int i;
4588                         /*------------------------------------------------------*/
4589                         /* ip is pointing at the basr r13,0/j +4 instruction    */
4590                         /* the vtable value follows this (i.e. ip+6)            */
4591                         /*------------------------------------------------------*/
4592                         *((gconstpointer *)(ip+6)) = table;
4593
4594                         for (i = 0; i < patch_info->table_size; i++) {
4595                                 table [i] = (int)patch_info->data.table [i] + code;
4596                         }
4597                         continue;
4598                 }
4599                 case MONO_PATCH_INFO_METHODCONST:
4600                 case MONO_PATCH_INFO_CLASS:
4601                 case MONO_PATCH_INFO_IMAGE:
4602                 case MONO_PATCH_INFO_FIELD:
4603                         target = S390_RELATIVE(patch_info->data.target, ip);
4604                         continue;
4605                 case MONO_PATCH_INFO_R4:
4606                 case MONO_PATCH_INFO_R8:
4607                         g_assert_not_reached ();
4608                         *((gconstpointer *)(ip + 2)) = patch_info->data.target;
4609                         continue;
4610                 case MONO_PATCH_INFO_IID:
4611                         mono_class_init (patch_info->data.klass);
4612                         target = S390_RELATIVE(patch_info->data.klass->interface_id, ip);
4613                         continue;
4614                 case MONO_PATCH_INFO_VTABLE:
4615                         target = S390_RELATIVE(mono_class_vtable (domain, patch_info->data.klass),ip);
4616                         ip += 2;
4617                         continue;
4618                 case MONO_PATCH_INFO_CLASS_INIT:
4619                         target = S390_RELATIVE(mono_create_class_init_trampoline (mono_class_vtable (domain, patch_info->data.klass)), ip);
4620                         ip += 2;
4621                         break;
4622                 case MONO_PATCH_INFO_SFLDA: {
4623                         MonoVTable *vtable = mono_class_vtable (domain, patch_info->data.field->parent);
4624                         if (!vtable->initialized && !(vtable->klass->flags & TYPE_ATTRIBUTE_BEFORE_FIELD_INIT) && mono_class_needs_cctor_run (vtable->klass, method))
4625                                 /* Done by the generated code */
4626                                 ;
4627                         else {
4628                                 if (run_cctors)
4629                                         mono_runtime_class_init (vtable);
4630                         }
4631                         target = S390_RELATIVE((char*)vtable->data + patch_info->data.field->offset, ip);
4632                         ip += 2;
4633                         continue;
4634                 }
4635                 case MONO_PATCH_INFO_EXC_NAME:
4636                         *((gconstpointer *)(ip)) = patch_info->data.name;
4637                         continue;
4638                 case MONO_PATCH_INFO_LDSTR:
4639                         target = mono_ldstr (domain, patch_info->data.token->image,
4640                                              mono_metadata_token_index (patch_info->data.token->token));
4641                         continue;
4642                 case MONO_PATCH_INFO_TYPE_FROM_HANDLE: {
4643                         gpointer handle;
4644                         MonoClass *handle_class;
4645
4646                         handle = mono_ldtoken (patch_info->data.token->image,
4647                                                patch_info->data.token->token,
4648                                                &handle_class, NULL);
4649                         mono_class_init (handle_class);
4650                         mono_class_init (mono_class_from_mono_type (handle));
4651
4652                         target = handle;
4653                         continue;
4654                 }
4655                 case MONO_PATCH_INFO_LDTOKEN: {
4656                         gpointer handle;
4657                         MonoClass *handle_class;
4658
4659                         handle = mono_ldtoken (patch_info->data.token->image,
4660                                                patch_info->data.token->token,
4661                                                &handle_class, NULL);
4662                         mono_class_init (handle_class);
4663
4664                         target = handle;
4665                         continue;
4666                 }
4667                 case MONO_PATCH_INFO_EXC:
4668                         /* everything is dealt with at epilog output time */
4669                         continue;
4670                 default:
4671                         g_assert_not_reached ();
4672                 }
4673                 s390_patch (ip, target);
4674         }
4675 }
4676
4677 /*========================= End of Function ========================*/
4678
4679 /*------------------------------------------------------------------*/
4680 /*                                                                  */
4681 /* Name         - mono_arch_max_epilog_size                         */
4682 /*                                                                  */
4683 /* Function     - Determine the maximum size of the epilog code.    */
4684 /*                                                                  */
4685 /*------------------------------------------------------------------*/
4686
4687 int
4688 mono_arch_max_epilog_size (MonoCompile *cfg)
4689 {
4690         int max_epilog_size = 96;
4691         MonoJumpInfo *patch_info;
4692
4693         if (cfg->method->save_lmf)
4694                 max_epilog_size += 128;
4695
4696         if (mono_jit_trace_calls != NULL)
4697                 max_epilog_size += 128;
4698
4699         if (cfg->prof_options & MONO_PROFILE_ENTER_LEAVE)
4700                 max_epilog_size += 128;
4701
4702         /* count the number of exception infos */
4703
4704         for (patch_info = cfg->patch_info; patch_info; patch_info = patch_info->next) {
4705                 if (patch_info->type == MONO_PATCH_INFO_EXC)
4706                         max_epilog_size += 26;
4707         }
4708
4709         return max_epilog_size;
4710 }
4711
4712 /*========================= End of Function ========================*/
4713
4714 /*------------------------------------------------------------------*/
4715 /*                                                                  */
4716 /* Name         - mono_arch_emit_prolog                             */
4717 /*                                                                  */
4718 /* Function     - Create the instruction sequence for a function    */
4719 /*                prolog.                                           */
4720 /*                                                                  */
4721 /*------------------------------------------------------------------*/
4722
4723 guint8 *
4724 mono_arch_emit_prolog (MonoCompile *cfg)
4725 {
4726         MonoMethod *method = cfg->method;
4727         MonoBasicBlock *bb;
4728         MonoMethodSignature *sig;
4729         MonoInst *inst;
4730         int alloc_size, pos, max_offset, i, lmfOffset;
4731         guint8 *code;
4732         CallInfo *cinfo;
4733         size_data sz;
4734         int tracing = 0;
4735
4736         if (mono_jit_trace_calls != NULL && mono_trace_eval (method))
4737                 tracing = 1;
4738
4739         cfg->code_size   = 512;
4740         cfg->native_code = code = g_malloc (cfg->code_size);
4741
4742         if (cfg->flags & MONO_CFG_HAS_TAIL) {
4743                 s390_stm (code, s390_r2, s390_r14, STK_BASE, S390_PARM_SAVE_OFFSET);
4744                 for (pos = 0; pos < 4; pos++)
4745                         s390_std (code, pos, 0, STK_BASE,
4746                                   S390_FLOAT_SAVE_OFFSET+pos*sizeof(double));
4747         } else {
4748                 s390_stm  (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
4749         }
4750
4751         if (cfg->flags & MONO_CFG_HAS_ALLOCA) {
4752                 cfg->used_int_regs |= 1 << 11;
4753         }
4754
4755         alloc_size = cfg->stack_offset;
4756
4757         cfg->stack_usage = alloc_size;
4758         s390_lr   (code, s390_r11, STK_BASE);
4759         if (s390_is_imm16 (-alloc_size)) {
4760                 s390_ahi  (code, STK_BASE, -alloc_size);
4761         } else {
4762                 int stackSize = alloc_size;
4763                 while (stackSize > 32767) {
4764                         s390_ahi  (code, STK_BASE, -32767);
4765                         stackSize -= 32767;
4766                 }
4767                 s390_ahi  (code, STK_BASE, -stackSize);
4768         }
4769         s390_st   (code, s390_r11, 0, STK_BASE, 0);
4770
4771         if (cfg->frame_reg != STK_BASE)
4772                 s390_lr (code, s390_r11, STK_BASE);
4773
4774         /* compute max_offset in order to use short forward jumps
4775          * we always do it on s390 because the immediate displacement
4776          * for jumps is too small
4777          */
4778         max_offset = 0;
4779         for (bb = cfg->bb_entry; bb; bb = bb->next_bb) {
4780                 MonoInst *ins = bb->code;
4781                 bb->max_offset = max_offset;
4782
4783                 if (cfg->prof_options & MONO_PROFILE_COVERAGE)
4784                         max_offset += 6;
4785
4786                 while (ins) {
4787                         max_offset += ((guint8 *)ins_spec [ins->opcode])[MONO_INST_LEN];
4788                         ins = ins->next;
4789                 }
4790         }
4791
4792         /* load arguments allocated to register from the stack */
4793         sig = method->signature;
4794         pos = 0;
4795
4796         cinfo = calculate_sizes (sig, &sz, sig->pinvoke);
4797
4798         if (cinfo->struct_ret) {
4799                 ArgInfo *ainfo = &cinfo->ret;
4800                 inst         = cfg->ret;
4801                 inst->unused = ainfo->vtsize;
4802                 s390_st (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4803         }
4804
4805         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
4806                 ArgInfo *ainfo = cinfo->args + i;
4807                 inst = cfg->varinfo [pos];
4808
4809                 if (inst->opcode == OP_REGVAR) {
4810                         if (ainfo->regtype == RegTypeGeneral)
4811                                 s390_lr (code, inst->dreg, ainfo->reg);
4812                         else if (ainfo->regtype == RegTypeFP) {
4813                                 if (inst->dreg != ainfo->reg) {
4814                                         if (ainfo->size == 4) {
4815                                                 s390_ledbr (code, inst->dreg, ainfo->reg);
4816                                         } else {
4817                                                 s390_ldr   (code, inst->dreg, ainfo->reg);
4818                                         }
4819                                 }
4820                         }
4821                         else if (ainfo->regtype == RegTypeBase) {
4822                                 s390_lr  (code, s390_r13, STK_BASE);
4823                                 s390_ahi (code, s390_r13, alloc_size);
4824                                 s390_l   (code, inst->dreg, 0, s390_r13, ainfo->offset);
4825                         } else
4826                                 g_assert_not_reached ();
4827
4828                         if (cfg->verbose_level > 2)
4829                                 g_print ("Argument %d assigned to register %s\n",
4830                                          pos, mono_arch_regname (inst->dreg));
4831                 } else {
4832                         if (ainfo->regtype == RegTypeGeneral) {
4833                                 if (!((ainfo->reg >= 2) && (ainfo->reg <= 6)))
4834                                         g_assert_not_reached();
4835                                 switch (ainfo->size) {
4836                                 case 1:
4837                                         s390_stc (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4838                                         break;
4839                                 case 2:
4840                                         s390_sth (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4841                                         break;
4842                                 case 8:
4843                                         s390_stm (code, ainfo->reg, ainfo->reg + 1,
4844                                                   inst->inst_basereg, inst->inst_offset);
4845                                         break;
4846                                 default:
4847                                         s390_st  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4848                                 }
4849                         } else if (ainfo->regtype == RegTypeBase) {
4850                         } else if (ainfo->regtype == RegTypeFP) {
4851                                 if (ainfo->size == 8)
4852                                         s390_std (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4853                                 else if (ainfo->size == 4)
4854                                         s390_ste (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4855                                 else
4856                                         g_assert_not_reached ();
4857                         } else if (ainfo->regtype == RegTypeStructByVal) {
4858                                 int doffset = inst->inst_offset;
4859                                 int reg;
4860                                 if (ainfo->reg != STK_BASE)
4861                                         reg = ainfo->reg;
4862                                 else {
4863                                         reg = s390_r0;
4864                                         s390_lr  (code, s390_r13, STK_BASE);
4865                                         s390_ahi (code, s390_r13, alloc_size);
4866                                 }
4867                                 switch (ainfo->size) {
4868                                         case 1:
4869                                                 if (ainfo->reg == STK_BASE)
4870                                                         s390_ic  (code, reg, 0, s390_r13, ainfo->offset+3);
4871                                                 s390_stc (code, reg, 0, inst->inst_basereg, doffset);
4872                                                 break;
4873                                         case 2:
4874                                                 if (ainfo->reg == STK_BASE)
4875                                                         s390_lh  (code, reg, 0, s390_r13, ainfo->offset+2);
4876                                                 s390_sth (code, reg, 0, inst->inst_basereg, doffset);
4877                                                 break;
4878                                         case 4:
4879                                                 if (ainfo->reg == STK_BASE)
4880                                                         s390_l   (code, reg, 0, s390_r13, ainfo->offset);
4881                                                 s390_st  (code, reg, 0, inst->inst_basereg, doffset);
4882                                                 break;
4883                                         case 8:
4884                                                 if (ainfo->reg == STK_BASE)
4885                                                         s390_lm  (code, s390_r0, s390_r1, s390_r13, ainfo->offset);
4886                                                 s390_stm (code, reg, reg+1, inst->inst_basereg, doffset);
4887                                                 break;
4888                                 }
4889                         } else if (ainfo->regtype == RegTypeStructByAddr) {
4890                                 if (ainfo->reg == STK_BASE) {
4891                                         s390_lr  (code, s390_r13, ainfo->reg);
4892                                         s390_ahi (code, s390_r13, alloc_size);
4893                                         s390_l   (code, s390_r13, 0, s390_r13,
4894                                                   ainfo->offparm + S390_MINIMAL_STACK_SIZE);
4895                                         code = emit_memcpy (code, abs(ainfo->vtsize),
4896                                                             inst->inst_basereg,
4897                                                             inst->inst_offset, s390_r13, 0);
4898                                 } else {
4899                                         code = emit_memcpy (code, abs(ainfo->vtsize),
4900                                                             inst->inst_basereg,
4901                                                             inst->inst_offset,
4902                                                             ainfo->reg, 0);
4903                                 }
4904                         } else
4905                                 g_assert_not_reached ();
4906                 }
4907                 pos++;
4908         }
4909
4910         if (method->save_lmf) {
4911                 /*---------------------------------------------------------------*/
4912                 /* Preserve the parameter registers while we fix up the lmf      */
4913                 /*---------------------------------------------------------------*/
4914                 s390_lr (code, s390_r7, s390_r2);
4915                 s390_lr (code, s390_r8, s390_r3);
4916                 s390_lr (code, s390_r9, s390_r4);
4917                 s390_lr (code, s390_r10, s390_r5);
4918
4919                 mono_add_patch_info (cfg, code - cfg->native_code,
4920                                      MONO_PATCH_INFO_INTERNAL_METHOD,
4921                                      (gpointer)"mono_get_lmf_addr");
4922                 /*---------------------------------------------------------------*/
4923                 /* On return from this call r2 have the address of the &lmf      */
4924                 /*---------------------------------------------------------------*/
4925                 s390_brasl (code, s390_r14, 0);
4926
4927                 /*---------------------------------------------------------------*/
4928                 /* we build the MonoLMF structure on the stack - see mini-s390.h */
4929                 /*---------------------------------------------------------------*/
4930                 lmfOffset = alloc_size - sizeof(MonoLMF);
4931
4932                 s390_lr    (code, s390_r13, cfg->frame_reg);
4933                 s390_ahi   (code, s390_r13, lmfOffset);
4934
4935                 /*---------------------------------------------------------------*/
4936                 /* Set lmf.lmf_addr = jit_tls->lmf                               */
4937                 /*---------------------------------------------------------------*/
4938                 s390_st    (code, s390_r2, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, lmf_addr));
4939
4940                 /*---------------------------------------------------------------*/
4941                 /* Get current lmf                                               */
4942                 /*---------------------------------------------------------------*/
4943                 s390_l     (code, s390_r0, 0, s390_r2, 0);
4944
4945                 /*---------------------------------------------------------------*/
4946                 /* Set our lmf as the current lmf                                */
4947                 /*---------------------------------------------------------------*/
4948                 s390_st    (code, s390_r13, 0, s390_r2, 0);
4949
4950                 /*---------------------------------------------------------------*/
4951                 /* Have our lmf.previous_lmf point to the last lmf               */
4952                 /*---------------------------------------------------------------*/
4953                 s390_st    (code, s390_r0, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, previous_lmf));
4954
4955                 /*---------------------------------------------------------------*/
4956                 /* save method info                                              */
4957                 /*---------------------------------------------------------------*/
4958                 s390_basr  (code, s390_r1, 0);
4959                 s390_j     (code, 4);
4960                 s390_word  (code, method);
4961                 s390_l     (code, s390_r1, 0, s390_r1, 4);
4962                 s390_st    (code, s390_r1, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, method));
4963
4964                 /*---------------------------------------------------------------*/
4965                 /* save the current IP                                           */
4966                 /*---------------------------------------------------------------*/
4967                 s390_lr    (code, s390_r1, cfg->frame_reg);
4968                 s390_st    (code, s390_r1, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, ebp));
4969                 s390_l     (code, s390_r1, 0, s390_r1, S390_RET_ADDR_OFFSET);
4970                 s390_la    (code, s390_r1, 0, s390_r1, 0);
4971                 s390_st    (code, s390_r1, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, eip));
4972
4973                 /*---------------------------------------------------------------*/
4974                 /* Save general and floating point registers                     */
4975                 /*---------------------------------------------------------------*/
4976                 s390_stm   (code, s390_r2, s390_r12, s390_r13, G_STRUCT_OFFSET(MonoLMF, gregs[2]));
4977                 for (i = 0; i < 16; i++) {
4978                         s390_std  (code, i, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, fregs[i]));
4979                 }
4980
4981                 /*---------------------------------------------------------------*/
4982                 /* Restore the parameter registers now that we've set up the lmf */
4983                 /*---------------------------------------------------------------*/
4984                 s390_lr (code, s390_r2, s390_r7);
4985                 s390_lr (code, s390_r3, s390_r8);
4986                 s390_lr (code, s390_r4, s390_r9);
4987                 s390_lr (code, s390_r5, s390_r10);
4988         }
4989
4990         if (tracing)
4991                 code = mono_arch_instrument_prolog (cfg, enter_method, code, TRUE);
4992
4993         cfg->code_len = code - cfg->native_code;
4994         g_free (cinfo);
4995
4996         return code;
4997 }
4998
4999 /*========================= End of Function ========================*/
5000
5001 /*------------------------------------------------------------------*/
5002 /*                                                                  */
5003 /* Name         - mono_arch_emit_epilog                             */
5004 /*                                                                  */
5005 /* Function     - Emit the instructions for a function epilog.      */
5006 /*                                                                  */
5007 /*------------------------------------------------------------------*/
5008
5009 void
5010 mono_arch_emit_epilog (MonoCompile *cfg)
5011 {
5012         MonoJumpInfo *patch_info;
5013         MonoMethod *method = cfg->method;
5014         MonoMethodSignature *sig = method->signature;
5015         MonoInst *inst;
5016         int i, tracing = 0;
5017         guint8 *code;
5018
5019         code = cfg->native_code + cfg->code_len;
5020
5021         if (mono_jit_trace_calls != NULL && mono_trace_eval (method)) {
5022                 code = mono_arch_instrument_epilog (cfg, leave_method, code, TRUE);
5023                 tracing = 1;
5024         }
5025
5026         if (method->save_lmf)
5027                 code = restoreLMF(cfg, code);
5028
5029         if (cfg->flags & MONO_CFG_HAS_ALLOCA)
5030                 s390_l   (code, STK_BASE, 0, STK_BASE, 0);
5031         else
5032                 code = backUpStackPtr(cfg, code);
5033
5034         s390_lm  (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
5035         s390_br  (code, s390_r14);
5036
5037         /* add code to raise exceptions */
5038         for (patch_info = cfg->patch_info; patch_info; patch_info = patch_info->next) {
5039                 switch (patch_info->type) {
5040                 case MONO_PATCH_INFO_EXC: {
5041                         /*-----------------------------------------------------*/
5042                         /* Patch the branch in epilog to come here             */
5043                         /*-----------------------------------------------------*/
5044                         s390_patch (patch_info->ip.i+cfg->native_code+2,
5045                                     S390_RELATIVE(code,patch_info->ip.i+cfg->native_code));
5046                         /*-----------------------------------------------------*/
5047                         /* Patch the parameter passed to the handler           */
5048                         /*-----------------------------------------------------*/
5049                         s390_basr (code, s390_r13, 0);
5050                         s390_j    (code, 4);
5051                         mono_add_patch_info (cfg, code - cfg->native_code,
5052                                              MONO_PATCH_INFO_EXC_NAME,
5053                                              patch_info->data.target);
5054                         s390_word (code, 0);
5055                         /*-----------------------------------------------------*/
5056                         /* Load the return address and the parameter register  */
5057                         /*-----------------------------------------------------*/
5058                         s390_larl (code, s390_r14, S390_RELATIVE((patch_info->ip.i +
5059                                                    cfg->native_code + 8), code));
5060                         s390_l    (code, s390_r2, 0, s390_r13, 4);
5061                         /*-----------------------------------------------------*/
5062                         /* Reuse the current patch to set the jump             */
5063                         /*-----------------------------------------------------*/
5064                         patch_info->type      = MONO_PATCH_INFO_INTERNAL_METHOD;
5065                         patch_info->data.name = "mono_arch_throw_exception_by_name";
5066                         patch_info->ip.i      = code - cfg->native_code;
5067                         s390_jcl  (code, S390_CC_UN, 0);
5068                         break;
5069                 }
5070                 default:
5071                         /* do nothing */
5072                         break;
5073                 }
5074         }
5075
5076         cfg->code_len = code - cfg->native_code;
5077
5078         g_assert (cfg->code_len < cfg->code_size);
5079
5080 }
5081
5082 /*========================= End of Function ========================*/
5083
5084 /*------------------------------------------------------------------*/
5085 /*                                                                  */
5086 /* Name         - mono_arch_setup_jit_tls_data                      */
5087 /*                                                                  */
5088 /* Function     - Setup the JIT's Thread Level Specific Data.       */
5089 /*                                                                  */
5090 /*------------------------------------------------------------------*/
5091
5092 void
5093 mono_arch_setup_jit_tls_data (MonoJitTlsData *tls)
5094 {
5095 #ifdef MONO_ARCH_SIGSEGV_ON_ALTSTACK
5096         pthread_t       self = pthread_self();
5097         pthread_attr_t  attr;
5098         void            *stAddr = NULL;
5099         size_t          stSize  = 0;
5100         struct sigaltstack sa;
5101 #endif
5102
5103         if (!tls_offset_inited) {
5104                 tls_offset_inited = TRUE;
5105
5106 //              lmf_tls_offset = read_tls_offset_from_method (mono_get_lmf_addr);
5107 //              appdomain_tls_offset = read_tls_offset_from_method (mono_domain_get);
5108 //              thread_tls_offset = read_tls_offset_from_method (mono_thread_current);
5109         }
5110
5111 #ifdef MONO_ARCH_SIGSEGV_ON_ALTSTACK
5112
5113         /*----------------------------------------------------------*/
5114         /* Determine stack boundaries                               */
5115         /*----------------------------------------------------------*/
5116         if (!mono_running_on_valgrind ()) {
5117 #ifdef HAVE_PTHREAD_GETATTR_NP
5118                 pthread_getattr_np( self, &attr );
5119 #elif HAVE_PTHREAD_ATTR_GET_NP
5120                 pthread_attr_get_np( self, &attr );
5121 #endif
5122                 pthread_attr_getstack( &attr, &stAddr, &stSize );
5123         }
5124
5125
5126         /*----------------------------------------------------------*/
5127         /* Setup an alternate signal stack                          */
5128         /*----------------------------------------------------------*/
5129         tls->stack_size        = stSize;
5130         tls->signal_stack      = g_malloc (SIGNAL_STACK_SIZE);
5131         tls->signal_stack_size = SIGNAL_STACK_SIZE;
5132
5133         sa.ss_sp    = tls->signal_stack;
5134         sa.ss_size  = SIGNAL_STACK_SIZE;
5135         sa.ss_flags = SS_ONSTACK;
5136         sigaltstack (&sa, NULL);
5137 #endif
5138
5139 }
5140
5141 /*========================= End of Function ========================*/
5142
5143 /*------------------------------------------------------------------*/
5144 /*                                                                  */
5145 /* Name         - mono_arch_free_jit_tls_data                       */
5146 /*                                                                  */
5147 /* Function     - Free tls data.                                    */
5148 /*                                                                  */
5149 /*------------------------------------------------------------------*/
5150
5151 void
5152 mono_arch_free_jit_tls_data (MonoJitTlsData *tls)
5153 {
5154 #ifdef MONO_ARCH_SIGSEGV_ON_ALTSTACK
5155         struct sigaltstack sa;
5156
5157         sa.ss_sp    = tls->signal_stack;
5158         sa.ss_size  = SIGNAL_STACK_SIZE;
5159         sa.ss_flags = SS_DISABLE;
5160         sigaltstack (&sa, NULL);
5161
5162         if (tls->signal_stack)
5163                 g_free (tls->signal_stack);
5164 #endif
5165
5166 }
5167
5168 /*========================= End of Function ========================*/
5169
5170 /*------------------------------------------------------------------*/
5171 /*                                                                  */
5172 /* Name         - mono_arch_emit_this_vret_args                     */
5173 /*                                                                  */
5174 /* Function     -                                                   */
5175 /*                                                                  */
5176 /*------------------------------------------------------------------*/
5177
5178 void
5179 mono_arch_emit_this_vret_args (MonoCompile *cfg, MonoCallInst *inst, int this_reg, int this_type, int vt_reg)
5180 {
5181         int this_dreg = s390_r2;
5182
5183         if (vt_reg != -1)
5184                 this_dreg = s390_r3;
5185
5186         /* add the this argument */
5187         if (this_reg != -1) {
5188                 MonoInst *this;
5189                 MONO_INST_NEW (cfg, this, OP_SETREG);
5190                 this->type = this_type;
5191                 this->sreg1 = this_reg;
5192                 this->dreg = this_dreg;
5193                 mono_bblock_add_inst (cfg->cbb, this);
5194         }
5195
5196         if (vt_reg != -1) {
5197                 MonoInst *vtarg;
5198                 MONO_INST_NEW (cfg, vtarg, OP_SETREG);
5199                 vtarg->type = STACK_MP;
5200                 vtarg->sreg1 = vt_reg;
5201                 vtarg->dreg = s390_r2;
5202                 mono_bblock_add_inst (cfg->cbb, vtarg);
5203         }
5204 }
5205
5206 /*========================= End of Function ========================*/
5207
5208 /*------------------------------------------------------------------*/
5209 /*                                                                  */
5210 /* Name         - mono_arch_get_opcode_for_method                   */
5211 /*                                                                  */
5212 /* Function     - Check for opcodes we can handle directly in       */
5213 /*                hardware.                                         */
5214 /*                                                                  */
5215 /*------------------------------------------------------------------*/
5216
5217 gint
5218 mono_arch_get_opcode_for_method (MonoCompile *cfg, MonoMethod *cmethod, MonoMethodSignature *fsig, MonoInst **args)
5219 {
5220         if (cmethod->klass == mono_defaults.math_class) {
5221                 if (strcmp (cmethod->name, "Sqrt") == 0)
5222                         return OP_SQRT;
5223         }
5224         return -1;
5225 }
5226
5227 /*========================= End of Function ========================*/
5228
5229 /*------------------------------------------------------------------*/
5230 /*                                                                  */
5231 /* Name         - mono_arch_print_tree                              */
5232 /*                                                                  */
5233 /* Function     - Print platform-specific opcode details.           */
5234 /*                                                                  */
5235 /* Returns      - 1 - opcode details have been printed              */
5236 /*                0 - opcode details have not been printed          */
5237 /*                                                                  */
5238 /*------------------------------------------------------------------*/
5239
5240 gboolean
5241 mono_arch_print_tree (MonoInst *tree, int arity)
5242 {
5243         gboolean done;
5244
5245         switch (tree->opcode) {
5246                 case OP_S390_LOADARG:
5247                 case OP_S390_ARGPTR:
5248                 case OP_S390_STKARG:
5249                         printf ("[0x%x(%s)]", tree->inst_offset,
5250                                 mono_arch_regname (tree->inst_basereg));
5251                         done = 1;
5252                         break;
5253                 case OP_S390_MOVE:
5254                         printf ("[0x%x(%d,%s),0x%x(%s)]",
5255                                 tree->inst_offset, tree->unused,
5256                                 tree->dreg, tree->inst_imm,
5257                                 tree->sreg1);
5258                         done = 1;
5259                         break;
5260                 case OP_S390_SETF4RET:
5261                         printf ("[f%d,f%d]",
5262                                 mono_arch_regname (tree->dreg),
5263                                 mono_arch_regname (tree->sreg1));
5264                 default:
5265                         done = 0;
5266         }
5267         return (done);
5268 }
5269
5270 /*========================= End of Function ========================*/
5271
5272 /*------------------------------------------------------------------*/
5273 /*                                                                  */
5274 /* Name         - mono_arch_regalloc_cost                           */
5275 /*                                                                  */
5276 /* Function     - Determine the cost, in the number of memory       */
5277 /*                references, of the action of allocating the var-  */
5278 /*                iable VMV into a register during global register  */
5279 /*                allocation.                                       */
5280 /*                                                                  */
5281 /* Returns      - Cost                                              */
5282 /*                                                                  */
5283 /*------------------------------------------------------------------*/
5284
5285 guint32
5286 mono_arch_regalloc_cost (MonoCompile *cfg, MonoMethodVar *vmv)
5287 {
5288         /* FIXME: */
5289         return 3;
5290 }
5291
5292 /*========================= End of Function ========================*/
5293
5294 /*------------------------------------------------------------------*/
5295 /*                                                                  */
5296 /* Name         - mono_arch_get_domain_intrinsic                    */
5297 /*                                                                  */
5298 /* Function     -                                                   */
5299 /*                                                                  */
5300 /* Returns      -                                                   */
5301 /*                                                                  */
5302 /*------------------------------------------------------------------*/
5303
5304 MonoInst* mono_arch_get_domain_intrinsic (MonoCompile* cfg)
5305 {
5306         return NULL;
5307 }
5308
5309 /*========================= End of Function ========================*/
5310
5311 /*------------------------------------------------------------------*/
5312 /*                                                                  */
5313 /* Name         - mono_arch_get_thread_intrinsic                    */
5314 /*                                                                  */
5315 /* Function     -                                                   */
5316 /*                                                                  */
5317 /* Returns      -                                                   */
5318 /*                                                                  */
5319 /*------------------------------------------------------------------*/
5320
5321 MonoInst* mono_arch_get_thread_intrinsic (MonoCompile* cfg)
5322 {
5323         return NULL;
5324 }
5325
5326 /*========================= End of Function ========================*/