mono/mini/mini-s390x.c

   1 /*------------------------------------------------------------------*/
   2 /*                                                                  */
   3 /* Name        - mini-s390.c                                        */
   4 /*                                                                  */
   5 /* Function    - S/390 backend for the Mono code generator.         */
   6 /*                                                                  */
   7 /* Name        - Neale Ferguson (Neale.Ferguson@SoftwareAG-usa.com) */
   8 /*                                                                  */
   9 /* Date        - January, 2004                                      */
  10 /*                                                                  */
  11 /* Derivation  - From mini-x86 & mini-ppc by -                      */
  12 /*               Paolo Molaro (lupus@ximian.com)                    */
  13 /*               Dietmar Maurer (dietmar@ximian.com)                */
  14 /*                                                                  */
  15 /*------------------------------------------------------------------*/
  16
  17 /*------------------------------------------------------------------*/
  18 /*                 D e f i n e s                                    */
  19 /*------------------------------------------------------------------*/
  20
  21 #define NOT_IMPLEMENTED(x) \
  22         g_error ("FIXME: %s is not yet implemented.", x);
  23
  24 #define EMIT_COND_BRANCH(ins,cond)                                                      \
  25 {                                                                                       \
  26 if (ins->flags & MONO_INST_BRLABEL) {                                                   \
  27         if (ins->inst_i0->inst_c0) {                                                    \
  28                 int displace;                                                           \
  29                 displace = ((cfg->native_code + ins->inst_i0->inst_c0) - code) / 2;     \
  30                 if (s390_is_imm16(displace)) {                                          \
  31                         s390_brc (code, cond, displace);                                \
  32                 } else {                                                                \
  33                         s390_jcl (code, cond, displace);                                \
  34                 }                                                                       \
  35         } else {                                                                        \
  36                 mono_add_patch_info (cfg, code - cfg->native_code,                      \
  37                                      MONO_PATCH_INFO_LABEL, ins->inst_i0);              \
  38                 s390_jcl (code, cond, 0);                                               \
  39         }                                                                               \
  40 } else {                                                                                \
  41         if (ins->inst_true_bb->native_offset) {                                         \
  42                 int displace;                                                           \
  43                 displace = ((cfg->native_code +                                         \
  44                             ins->inst_true_bb->native_offset) - code) / 2;              \
  45                 if (s390_is_imm16(displace)) {                                          \
  46                         s390_brc (code, cond, displace);                                \
  47                 } else {                                                                \
  48                         s390_jcl (code, cond, displace);                                \
  49                 }                                                                       \
  50         } else {                                                                        \
  51                 mono_add_patch_info (cfg, code - cfg->native_code,                      \
  52                                      MONO_PATCH_INFO_BB, ins->inst_true_bb);            \
  53                 s390_jcl (code, cond, 0);                                               \
  54         }                                                                               \
  55 }                                                                                       \
  56 }
  57
  58 #define EMIT_UNCOND_BRANCH(ins)                                                         \
  59 {                                                                                       \
  60 if (ins->flags & MONO_INST_BRLABEL) {                                                   \
  61         if (ins->inst_i0->inst_c0) {                                                    \
  62                 int displace;                                                           \
  63                 displace = ((cfg->native_code + ins->inst_i0->inst_c0) - code) / 2;     \
  64                 if (s390_is_imm16(displace)) {                                          \
  65                         s390_brc (code, S390_CC_UN, displace);                          \
  66                 } else {                                                                \
  67                         s390_jcl (code, S390_CC_UN, displace);                          \
  68                 }                                                                       \
  69         } else {                                                                        \
  70                 mono_add_patch_info (cfg, code - cfg->native_code,                      \
  71                                      MONO_PATCH_INFO_LABEL, ins->inst_i0);              \
  72                 s390_jcl (code, S390_CC_UN, 0);                                         \
  73         }                                                                               \
  74 } else {                                                                                \
  75         if (ins->inst_target_bb->native_offset) {                                       \
  76                 int displace;                                                           \
  77                 displace = ((cfg->native_code +                                         \
  78                             ins->inst_target_bb->native_offset) - code) / 2;            \
  79                 if (s390_is_imm16(displace)) {                                          \
  80                         s390_brc (code, S390_CC_UN, displace);                          \
  81                 } else {                                                                \
  82                         s390_jcl (code, S390_CC_UN, displace);                          \
  83                 }                                                                       \
  84         } else {                                                                        \
  85                 mono_add_patch_info (cfg, code - cfg->native_code,                      \
  86                                      MONO_PATCH_INFO_BB, ins->inst_target_bb);          \
  87                 s390_jcl (code, S390_CC_UN, 0);                                         \
  88         }                                                                               \
  89 }                                                                                       \
  90 }
  91
  92 #define EMIT_COND_SYSTEM_EXCEPTION(cond,exc_name)                       \
  93         do {                                                            \
  94                 mono_add_patch_info (cfg, code - cfg->native_code,      \
  95                                     MONO_PATCH_INFO_EXC, exc_name);     \
  96                 s390_jcl (code, cond, 0);                               \
  97         } while (0);
  98
  99 #define CHECK_SRCDST_COM                                                \
 100         if (ins->dreg == ins->sreg2) {                                  \
 101                 src2 = ins->sreg1;                                      \
 102         } else {                                                        \
 103                 src2 = ins->sreg2;                                      \
 104                 if (ins->dreg != ins->sreg1) {                          \
 105                         s390_lgr (code, ins->dreg, ins->sreg1);         \
 106                 }                                                       \
 107         }
 108
 109 #define CHECK_SRCDST_NCOM                                               \
 110         if (ins->dreg == ins->sreg2) {                                  \
 111                 src2 = s390_r13;                                        \
 112                 s390_lgr (code, s390_r13, ins->sreg2);                  \
 113         } else {                                                        \
 114                 src2 = ins->sreg2;                                      \
 115         }                                                               \
 116         if (ins->dreg != ins->sreg1) {                                  \
 117                 s390_lgr (code, ins->dreg, ins->sreg1);                 \
 118         }
 119
 120 #define CHECK_SRCDST_COM_I                                              \
 121         if (ins->dreg == ins->sreg2) {                                  \
 122                 src2 = ins->sreg1;                                      \
 123         } else {                                                        \
 124                 src2 = ins->sreg2;                                      \
 125                 if (ins->dreg != ins->sreg1) {                          \
 126                         s390_lgfr (code, ins->dreg, ins->sreg1);        \
 127                 }                                                       \
 128         }
 129
 130 #define CHECK_SRCDST_NCOM_I                                             \
 131         if (ins->dreg == ins->sreg2) {                                  \
 132                 src2 = s390_r13;                                        \
 133                 s390_lgfr (code, s390_r13, ins->sreg2);                 \
 134         } else {                                                        \
 135                 src2 = ins->sreg2;                                      \
 136         }                                                               \
 137         if (ins->dreg != ins->sreg1) {                                  \
 138                 s390_lgfr (code, ins->dreg, ins->sreg1);                \
 139         }
 140
 141 #define CHECK_SRCDST_COM_F                                              \
 142         if (ins->dreg == ins->sreg2) {                                  \
 143                 src2 = ins->sreg1;                                      \
 144         } else {                                                        \
 145                 src2 = ins->sreg2;                                      \
 146                 if (ins->dreg != ins->sreg1) {                          \
 147                         s390_ldr (code, ins->dreg, ins->sreg1);         \
 148                 }                                                       \
 149         }
 150
 151 #define CHECK_SRCDST_NCOM_F                                             \
 152         if (ins->dreg == ins->sreg2) {                                  \
 153                 src2 = s390_f15;                                        \
 154                 s390_ldr (code, s390_r13, ins->sreg2);                  \
 155         } else {                                                        \
 156                 src2 = ins->sreg2;                                      \
 157         }                                                               \
 158         if (ins->dreg != ins->sreg1) {                                  \
 159                 s390_ldr (code, ins->dreg, ins->sreg1);                 \
 160         }
 161
 162 #undef DEBUG
 163 #define DEBUG(a) if (cfg->verbose_level > 1) a
 164
 165 #define MAX_EXC 16
 166
 167 #define S390_TRACE_STACK_SIZE (5*sizeof(gpointer)+4*sizeof(gdouble))
 168
 169 #define MAX (a, b) ((a) > (b) ? (a) : (b))
 170
 171 /*========================= End of Defines =========================*/
 172
 173 /*------------------------------------------------------------------*/
 174 /*                 I n c l u d e s                                  */
 175 /*------------------------------------------------------------------*/
 176
 177 #include "mini.h"
 178 #include <string.h>
 179
 180 #include <mono/metadata/appdomain.h>
 181 #include <mono/metadata/debug-helpers.h>
 182 #include <mono/metadata/profiler-private.h>
 183 #include <mono/utils/mono-math.h>
 184
 185 #include "mini-s390x.h"
 186 #include "inssel.h"
 187 #include "cpu-s390x.h"
 188
 189 /*========================= End of Includes ========================*/
 190
 191 /*------------------------------------------------------------------*/
 192 /*                 T y p e d e f s                                  */
 193 /*------------------------------------------------------------------*/
 194
 195 typedef struct {
 196         guint stack_size,
 197               local_size,
 198               code_size,
 199               parm_size,
 200               offset,
 201               offStruct,
 202               retStruct;
 203 } size_data;
 204
 205 typedef enum {
 206         CMP_EQ,
 207         CMP_NE,
 208         CMP_LE,
 209         CMP_GE,
 210         CMP_LT,
 211         CMP_GT,
 212         CMP_LE_UN,
 213         CMP_GE_UN,
 214         CMP_LT_UN,
 215         CMP_GT_UN
 216 } CompRelation;
 217
 218 typedef enum {
 219         CMP_TYPE_L,
 220         CMP_TYPE_I,
 221         CMP_TYPE_F
 222 } CompType;
 223
 224 /*------------------------------------------------------------------*/
 225 /* Used by the instrument_emit_epilog                               */
 226 /*------------------------------------------------------------------*/
 227
 228 enum {
 229         SAVE_NONE,
 230         SAVE_STRUCT,
 231         SAVE_ONE,
 232         SAVE_TWO,
 233         SAVE_R4,
 234         SAVE_R8
 235 };
 236
 237 typedef struct InstList InstList;
 238
 239 struct InstList {
 240         InstList *prev;
 241         InstList *next;
 242         MonoInst *data;
 243 };
 244
 245 enum {
 246         RegTypeGeneral,
 247         RegTypeBase,
 248         RegTypeFP,
 249         RegTypeStructByVal,
 250         RegTypeStructByAddr
 251 };
 252
 253 typedef struct {
 254         gint32  offset;         /* offset from caller's stack */
 255         gint32  offparm;        /* offset from callee's stack */
 256         guint16 vtsize;         /* in param area */
 257         guint8  reg;
 258         guint8  regtype;        /* See RegType* */
 259         guint32 size;           /* Size of structure used by RegTypeStructByVal */
 260         gint32  type;           /* Data type of argument */
 261 } ArgInfo;
 262
 263 typedef struct {
 264         int nargs;
 265         int lastgr;
 266         guint32 stack_usage;
 267         guint32 struct_ret;
 268         ArgInfo ret;
 269         ArgInfo sigCookie;
 270         ArgInfo args [1];
 271 } CallInfo;
 272
 273 typedef struct {
 274         gint64  gr[5];          /* R2-R6                            */
 275         gdouble fp[3];          /* F0-F2                            */
 276 } __attribute__ ((packed)) RegParm;
 277
 278 /*========================= End of Typedefs ========================*/
 279
 280 /*------------------------------------------------------------------*/
 281 /*                   P r o t o t y p e s                            */
 282 /*------------------------------------------------------------------*/
 283
 284 static void indent (int);
 285 static guint8 * backUpStackPtr(MonoCompile *, guint8 *);
 286 static void decodeParm (MonoType *, void *, int);
 287 static void enter_method (MonoMethod *, RegParm *, char *);
 288 static void leave_method (MonoMethod *, ...);
 289 static gboolean is_regsize_var (MonoType *);
 290 static inline void add_general (guint *, size_data *, ArgInfo *);
 291 static inline void add_stackParm (guint *, size_data *, ArgInfo *, gint);
 292 static inline void add_float (guint *, size_data *, ArgInfo *);
 293 static CallInfo * calculate_sizes (MonoMethodSignature *, size_data *, gboolean);
 294 static void peephole_pass (MonoCompile *, MonoBasicBlock *);
 295 static guchar * emit_float_to_int (MonoCompile *, guchar *, int, int, int, gboolean);
 296 static void mono_arch_break(void);
 297 gpointer mono_arch_get_lmf_addr (void);
 298 static guint8 * emit_load_volatile_registers (guint8 *, MonoCompile *);
 299 static CompRelation opcode_to_cond (int);
 300 static void catch_SIGILL(int, siginfo_t *, void *);
 301 static void emit_sig_cookie (MonoCompile *, MonoCallInst *, CallInfo *, int);
 302
 303 /*========================= End of Prototypes ======================*/
 304
 305 /*------------------------------------------------------------------*/
 306 /*                 G l o b a l   V a r i a b l e s                  */
 307 /*------------------------------------------------------------------*/
 308
 309 int mono_exc_esp_offset = 0;
 310
 311 static int indent_level = 0;
 312
 313 int has_ld = 0;
 314
 315 static const char*const * ins_spec = s390x_cpu_desc;
 316
 317 static gboolean tls_offset_inited = FALSE;
 318
 319 static int appdomain_tls_offset = -1,
 320            lmf_tls_offset = -1,
 321            thread_tls_offset = -1;
 322
 323 pthread_key_t lmf_addr_key;
 324
 325 gboolean lmf_addr_key_inited = FALSE;
 326
 327 #if 0
 328
 329 extern __thread MonoDomain *tls_appdomain;
 330 extern __thread MonoThread *tls_current_object;
 331 extern __thread gpointer   mono_lmf_addr;
 332
 333 #endif
 334
 335 /*====================== End of Global Variables ===================*/
 336
 337 /*------------------------------------------------------------------*/
 338 /*                                                                  */
 339 /* Name         - mono_arch_regname                                 */
 340 /*                                                                  */
 341 /* Function     - Returns the name of the register specified by     */
 342 /*                the input parameter.                              */
 343 /*                                                                  */
 344 /*------------------------------------------------------------------*/
 345
 346 const char*
 347 mono_arch_regname (int reg) {
 348         static const char * rnames[] = {
 349                 "s390_r0", "s390_sp", "s390_r2", "s390_r3", "s390_r4",
 350                 "s390_r5", "s390_r6", "s390_r7", "s390_r8", "s390_r9",
 351                 "s390_r10", "s390_r11", "s390_r12", "s390_r13", "s390_r14",
 352                 "s390_r15"
 353         };
 354
 355         if (reg >= 0 && reg < 16)
 356                 return rnames [reg];
 357         else
 358                 return "unknown";
 359 }
 360
 361 /*========================= End of Function ========================*/
 362
 363 /*------------------------------------------------------------------*/
 364 /*                                                                  */
 365 /* Name         - mono_arch_fregname                                */
 366 /*                                                                  */
 367 /* Function     - Returns the name of the register specified by     */
 368 /*                the input parameter.                              */
 369 /*                                                                  */
 370 /*------------------------------------------------------------------*/
 371
 372 const char*
 373 mono_arch_fregname (int reg) {
 374         static const char * rnames[] = {
 375                 "s390_f0", "s390_f1", "s390_f2", "s390_f3", "s390_f4",
 376                 "s390_f5", "s390_f6", "s390_f7", "s390_f8", "s390_f9",
 377                 "s390_f10", "s390_f11", "s390_f12", "s390_f13", "s390_f14",
 378                 "s390_f15"
 379         };
 380
 381         if (reg >= 0 && reg < 16)
 382                 return rnames [reg];
 383         else
 384                 return "unknown";
 385 }
 386
 387 /*========================= End of Function ========================*/
 388
 389 /*------------------------------------------------------------------*/
 390 /*                                                                  */
 391 /* Name         - arch_get_argument_info                            */
 392 /*                                                                  */
 393 /* Function     - Gathers information on parameters such as size,   */
 394 /*                alignment, and padding. arg_info should be large  */
 395 /*                enough to hold param_count + 1 entries.           */
 396 /*                                                                  */
 397 /* Parameters   - @csig - Method signature                          */
 398 /*                @param_count - No. of parameters to consider      */
 399 /*                @arg_info - An array to store the result info     */
 400 /*                                                                  */
 401 /* Returns      - Size of the activation frame                      */
 402 /*                                                                  */
 403 /*------------------------------------------------------------------*/
 404
 405 int
 406 mono_arch_get_argument_info (MonoMethodSignature *csig,
 407                              int param_count,
 408                              MonoJitArgumentInfo *arg_info)
 409 {
 410         int k, frame_size = 0;
 411         int size, align, pad;
 412         int offset = 8;
 413
 414         if (MONO_TYPE_ISSTRUCT (csig->ret)) {
 415                 frame_size += sizeof (gpointer);
 416                 offset += 8;
 417         }
 418
 419         arg_info [0].offset = offset;
 420
 421         if (csig->hasthis) {
 422                 frame_size += sizeof (gpointer);
 423                 offset += 8;
 424         }
 425
 426         arg_info [0].size = frame_size;
 427
 428         for (k = 0; k < param_count; k++) {
 429
 430                 if (csig->pinvoke)
 431                         size = mono_type_native_stack_size (csig->params [k], &align);
 432                 else
 433                         size = mono_type_stack_size (csig->params [k], &align);
 434
 435                 frame_size += pad = (align - (frame_size & (align - 1))) & (align - 1);
 436                 arg_info [k].pad = pad;
 437                 frame_size += size;
 438                 arg_info [k + 1].pad = 0;
 439                 arg_info [k + 1].size = size;
 440                 offset += pad;
 441                 arg_info [k + 1].offset = offset;
 442                 offset += size;
 443         }
 444
 445         align = MONO_ARCH_FRAME_ALIGNMENT;
 446         frame_size += pad = (align - (frame_size & (align - 1))) & (align - 1);
 447         arg_info [k].pad = pad;
 448
 449         return frame_size;
 450 }
 451
 452 /*========================= End of Function ========================*/
 453
 454 /*------------------------------------------------------------------*/
 455 /*                                                                  */
 456 /* Name         - retFitsInReg.                                     */
 457 /*                                                                  */
 458 /* Function     - Determines if a value can be returned in one or   */
 459 /*                two registers.                                    */
 460 /*                                                                  */
 461 /*------------------------------------------------------------------*/
 462
 463 static inline gboolean
 464 retFitsInReg(guint32 size)
 465 {
 466         switch (size) {
 467                 case 0:
 468                 case 1:
 469                 case 2:
 470                 case 4:
 471                 case 8:
 472                         return (TRUE);
 473                 break;
 474                 default:
 475                         return (FALSE);
 476         }
 477 }
 478
 479 /*========================= End of Function ========================*/
 480
 481 /*------------------------------------------------------------------*/
 482 /*                                                                  */
 483 /* Name         - backStackPtr.                                     */
 484 /*                                                                  */
 485 /* Function     - Restore Stack Pointer to previous frame.          */
 486 /*                                                                  */
 487 /*------------------------------------------------------------------*/
 488
 489 static inline guint8 *
 490 backUpStackPtr(MonoCompile *cfg, guint8 *code)
 491 {
 492         int stackSize = cfg->stack_usage;
 493
 494         if (s390_is_uimm16 (stackSize)) {
 495                 s390_aghi  (code, STK_BASE, stackSize);
 496         } else {
 497                 while (stackSize > 32767) {
 498                         s390_aghi  (code, STK_BASE, 32767);
 499                         stackSize -= 32767;
 500                 }
 501                 s390_aghi  (code, STK_BASE, stackSize);
 502         }
 503         return (code);
 504 }
 505
 506 /*========================= End of Function ========================*/
 507
 508 /*------------------------------------------------------------------*/
 509 /*                                                                  */
 510 /* Name         - indent                                            */
 511 /*                                                                  */
 512 /* Function     - Perform nice indenting to current level           */
 513 /*                                                                  */
 514 /*------------------------------------------------------------------*/
 515
 516 static void
 517 indent (int diff) {
 518         int v;
 519         if (diff < 0)
 520                 indent_level += diff;
 521         v = indent_level;
 522         printf("[%3d] ",v);
 523         while (v-- > 0) {
 524                 printf (". ");
 525         }
 526         if (diff > 0)
 527                 indent_level += diff;
 528 }
 529
 530 /*========================= End of Function ========================*/
 531
 532 /*------------------------------------------------------------------*/
 533 /*                                                                  */
 534 /* Name         - decodeParm                                        */
 535 /*                                                                  */
 536 /* Function     - Decode a parameter for the trace.                 */
 537 /*                                                                  */
 538 /*------------------------------------------------------------------*/
 539
 540 static void
 541 decodeParm(MonoType *type, void *curParm, int size)
 542 {
 543         guint32 simpleType;
 544
 545         if (type->byref) {
 546                 printf("[BYREF:%p], ", *((char **) curParm));
 547         } else {
 548                 simpleType = mono_type_get_underlying_type(type)->type;
 549 enum_parmtype:
 550                 switch (simpleType) {
 551                         case MONO_TYPE_I :
 552                                 printf ("[INTPTR:%p], ", *((int **) curParm));
 553                                 break;
 554                         case MONO_TYPE_U :
 555                                 printf ("[UINTPTR:%p], ", *((int **) curParm));
 556                                 break;
 557                         case MONO_TYPE_BOOLEAN :
 558                                 printf ("[BOOL:%ld], ", *((gint64 *) curParm));
 559                                 break;
 560                         case MONO_TYPE_CHAR :
 561                                 printf ("[CHAR:%c], ", *((int  *) curParm));
 562                                 break;
 563                         case MONO_TYPE_I1 :
 564                                 printf ("[INT1:%ld], ", *((gint64 *) curParm));
 565                                 break;
 566                         case MONO_TYPE_I2 :
 567                                 printf ("[INT2:%ld], ", *((gint64 *) curParm));
 568                                 break;
 569                         case MONO_TYPE_I4 :
 570                                 printf ("[INT4:%ld], ", *((gint64 *) curParm));
 571                                 break;
 572                         case MONO_TYPE_U1 :
 573                                 printf ("[UINT1:%lu], ", *((guint64 *) curParm));
 574                                 break;
 575                         case MONO_TYPE_U2 :
 576                                 printf ("[UINT2:%lu], ", *((guint64 *) curParm));
 577                                 break;
 578                         case MONO_TYPE_U4 :
 579                                 printf ("[UINT4:%lu], ", *((guint64 *) curParm));
 580                                 break;
 581                         case MONO_TYPE_U8 :
 582                                 printf ("[UINT8:%lu], ", *((guint64 *) curParm));
 583                                 break;
 584                         case MONO_TYPE_STRING : {
 585                                 MonoString *s = *((MonoString **) curParm);
 586                                 if (s) {
 587                                         g_assert (((MonoObject *) s)->vtable->klass == mono_defaults.string_class);
 588                                         printf("[STRING:%p:%s], ", s, mono_string_to_utf8(s));
 589                                 } else {
 590                                         printf("[STRING:null], ");
 591                                 }
 592                                 break;
 593                         }
 594                         case MONO_TYPE_CLASS :
 595                         case MONO_TYPE_OBJECT : {
 596                                 MonoObject *obj = *((MonoObject **) curParm);
 597                                 MonoClass *class;
 598                                 if ((obj) && (obj->vtable)) {
 599                                         printf("[CLASS/OBJ:");
 600                                         class = obj->vtable->klass;
 601                                         printf("%p [%p] ",obj,curParm);
 602                                         if (class == mono_defaults.string_class) {
 603                                                 printf("[STRING:%p:%s]",
 604                                                        obj, mono_string_to_utf8 ((MonoString *) obj));
 605                                         } else if (class == mono_defaults.int32_class) {
 606                                                 printf("[INT32:%p:%d]",
 607                                                         obj, *(gint32 *)((char *)obj + sizeof (MonoObject)));
 608                                         } else
 609                                                 printf("[%s.%s:%p]",
 610                                                        class->name_space, class->name, obj);
 611                                         printf("], ");
 612                                 } else {
 613                                         printf("[OBJECT:null], ");
 614                                 }
 615                                 break;
 616                         }
 617                         case MONO_TYPE_PTR :
 618                                 printf("[PTR:%p], ", *((gpointer **) (curParm)));
 619                                 break;
 620                         case MONO_TYPE_FNPTR :
 621                                 printf("[FNPTR:%p], ", *((gpointer **) (curParm)));
 622                                 break;
 623                         case MONO_TYPE_ARRAY :
 624                                 printf("[ARRAY:%p], ", *((gpointer **) (curParm)));
 625                                 break;
 626                         case MONO_TYPE_SZARRAY :
 627                                 printf("[SZARRAY:%p], ", *((gpointer **) (curParm)));
 628                                 break;
 629                         case MONO_TYPE_I8 :
 630                                 printf("[INT8:%ld], ", *((gint64 *) (curParm)));
 631                                 break;
 632                         case MONO_TYPE_R4 :
 633                                 printf("[FLOAT4:%g], ", *((float *) (curParm)));
 634                                 break;
 635                         case MONO_TYPE_R8 :
 636                                 printf("[FLOAT8:%g], ", *((double *) (curParm)));
 637                                 break;
 638                         case MONO_TYPE_VALUETYPE : {
 639                                 int i;
 640                                 MonoMarshalType *info;
 641
 642                                 if (type->data.klass->enumtype) {
 643                                         simpleType = type->data.klass->enum_basetype->type;
 644                                         printf("{VALUETYPE} - ");
 645                                         goto enum_parmtype;
 646                                 }
 647
 648                                 info = mono_marshal_load_type_info (type->data.klass);
 649
 650                                 if ((info->native_size == sizeof(float)) &&
 651                                     (info->num_fields  == 1) &&
 652                                     (info->fields[0].field->type->type == MONO_TYPE_R4)) {
 653                                                 printf("[FLOAT4:%f], ", *((float *) (curParm)));
 654                                         break;
 655                                 }
 656
 657                                 if ((info->native_size == sizeof(double)) &&
 658                                     (info->num_fields  == 1) &&
 659                                     (info->fields[0].field->type->type == MONO_TYPE_R8)) {
 660                                         printf("[FLOAT8:%g], ", *((double *) (curParm)));
 661                                         break;
 662                                 }
 663
 664                                 printf("[VALUETYPE:");
 665                                 for (i = 0; i < size; i++)
 666                                         printf("%02x,", *((guint8 *)curParm+i));
 667                                 printf("]");
 668                                 break;
 669                         }
 670                         case MONO_TYPE_TYPEDBYREF: {
 671                                 int i;
 672                                 printf("[TYPEDBYREF:");
 673                                 for (i = 0; i < size; i++)
 674                                         printf("%02x,", *((guint8 *)curParm+i));
 675                                 printf("]");
 676                                 break;
 677                         }
 678                         default :
 679                                 printf("[?? - %d], ",simpleType);
 680                 }
 681         }
 682 }
 683
 684 /*========================= End of Function ========================*/
 685
 686 /*------------------------------------------------------------------*/
 687 /*                                                                  */
 688 /* Name         - enter_method                                      */
 689 /*                                                                  */
 690 /* Function     - Perform tracing of the entry to the current       */
 691 /*                method.                                           */
 692 /*                                                                  */
 693 /*------------------------------------------------------------------*/
 694
 695 static void
 696 enter_method (MonoMethod *method, RegParm *rParm, char *sp)
 697 {
 698         int i, oParm = 0, iParm = 0;
 699         MonoClass *class;
 700         MonoObject *obj;
 701         MonoMethodSignature *sig;
 702         char *fname;
 703         guint64 ip;
 704         CallInfo *cinfo;
 705         ArgInfo *ainfo;
 706         size_data sz;
 707         void *curParm;
 708
 709         fname = mono_method_full_name (method, TRUE);
 710         indent (1);
 711         printf ("ENTER: %s ", fname);
 712         g_free (fname);
 713
 714         ip  = (*(guint64 *) (sp+S390_RET_ADDR_OFFSET));
 715         printf ("ip: %p sp: %p - ", (gpointer) ip, sp);
 716
 717         if (rParm == NULL)
 718                 return;
 719
 720         sig = mono_method_signature (method);
 721
 722         cinfo = calculate_sizes (sig, &sz, sig->pinvoke);
 723
 724         if (cinfo->struct_ret) {
 725                 printf ("[STRUCTRET:%p], ", (gpointer) rParm->gr[0]);
 726                 iParm = 1;
 727         }
 728
 729         if (sig->hasthis) {
 730                 gpointer *this = (gpointer *) rParm->gr[iParm];
 731                 obj = (MonoObject *) this;
 732                 if (method->klass->valuetype) {
 733                         if (obj) {
 734                                 printf("this:[value:%p:%016lx], ",
 735                                        this, *((guint64 *)(this+sizeof(MonoObject))));
 736                         } else
 737                                 printf ("this:[NULL], ");
 738                 } else {
 739                         if (obj) {
 740                                 class = obj->vtable->klass;
 741                                 if (class == mono_defaults.string_class) {
 742                                         printf ("this:[STRING:%p:%s], ",
 743                                                 obj, mono_string_to_utf8 ((MonoString *)obj));
 744                                 } else {
 745                                         printf ("this:%p[%s.%s], ",
 746                                                 obj, class->name_space, class->name);
 747                                 }
 748                         } else
 749                                 printf ("this:NULL, ");
 750                 }
 751                 oParm++;
 752         }
 753
 754         for (i = 0; i < sig->param_count; ++i) {
 755                 ainfo = &cinfo->args[i + oParm];
 756                 switch (ainfo->regtype) {
 757                         case RegTypeGeneral :
 758                                 decodeParm(sig->params[i], &(rParm->gr[ainfo->reg-2]), ainfo->size);
 759                                 break;
 760                         case RegTypeFP :
 761                                 decodeParm(sig->params[i], &(rParm->fp[ainfo->reg]), ainfo->size);
 762                                 break;
 763                         case RegTypeBase :
 764                                 decodeParm(sig->params[i], sp+ainfo->offset, ainfo->size);
 765                                 break;
 766                         case RegTypeStructByVal :
 767                                 if (ainfo->reg != STK_BASE) {
 768                                         int offset = sizeof(glong) - ainfo->size;
 769                                         curParm = &(rParm->gr[ainfo->reg-2])+offset;
 770                                 }
 771                                 else
 772                                         curParm = sp+ainfo->offset;
 773
 774                                 if (retFitsInReg (ainfo->vtsize))
 775                                         decodeParm(sig->params[i],
 776                                                    curParm,
 777                                                    ainfo->size);
 778                                 else
 779                                         decodeParm(sig->params[i],
 780                                                    *((char **) curParm),
 781                                                    ainfo->vtsize);
 782                                 break;
 783                         case RegTypeStructByAddr :
 784                                 if (ainfo->reg != STK_BASE)
 785                                         curParm = &(rParm->gr[ainfo->reg-2]);
 786                                 else
 787                                         curParm = sp+ainfo->offset;
 788
 789                                 decodeParm(sig->params[i],
 790                                            *((char **) curParm),
 791                                            ainfo->vtsize);
 792                                 break;
 793
 794                         default :
 795                                 printf("???, ");
 796                 }
 797         }
 798         printf("\n");
 799         g_free(cinfo);
 800 }
 801
 802 /*========================= End of Function ========================*/
 803
 804 /*------------------------------------------------------------------*/
 805 /*                                                                  */
 806 /* Name         - leave_method                                      */
 807 /*                                                                  */
 808 /* Function     -                                                   */
 809 /*                                                                  */
 810 /*------------------------------------------------------------------*/
 811
 812 static void
 813 leave_method (MonoMethod *method, ...)
 814 {
 815         MonoType *type;
 816         char *fname;
 817         guint64 ip;
 818         va_list ap;
 819
 820         va_start(ap, method);
 821
 822         fname = mono_method_full_name (method, TRUE);
 823         indent (-1);
 824         printf ("LEAVE: %s", fname);
 825         g_free (fname);
 826
 827         type = mono_method_signature (method)->ret;
 828
 829 handle_enum:
 830         switch (type->type) {
 831         case MONO_TYPE_VOID:
 832                 break;
 833         case MONO_TYPE_BOOLEAN: {
 834                 int val = va_arg (ap, int);
 835                 if (val)
 836                         printf ("[TRUE:%d]", val);
 837                 else
 838                         printf ("[FALSE]");
 839
 840                 break;
 841         }
 842         case MONO_TYPE_CHAR: {
 843                 int val = va_arg (ap, int);
 844                 printf ("[CHAR:%d]", val);
 845                 break;
 846         }
 847         case MONO_TYPE_I1: {
 848                 int val = va_arg (ap, int);
 849                 printf ("[INT1:%d]", val);
 850                 break;
 851         }
 852         case MONO_TYPE_U1: {
 853                 int val = va_arg (ap, int);
 854                 printf ("[UINT1:%d]", val);
 855                 break;
 856         }
 857         case MONO_TYPE_I2: {
 858                 int val = va_arg (ap, int);
 859                 printf ("[INT2:%d]", val);
 860                 break;
 861         }
 862         case MONO_TYPE_U2: {
 863                 int val = va_arg (ap, int);
 864                 printf ("[UINT2:%d]", val);
 865                 break;
 866         }
 867         case MONO_TYPE_I4: {
 868                 int val = va_arg (ap, int);
 869                 printf ("[INT4:%d]", val);
 870                 break;
 871         }
 872         case MONO_TYPE_U4: {
 873                 int val = va_arg (ap, int);
 874                 printf ("[UINT4:%d]", val);
 875                 break;
 876         }
 877         case MONO_TYPE_I: {
 878                 gint64 val = va_arg (ap, gint64);
 879                 printf ("[INT:%ld]", val);
 880                 printf("]");
 881                 break;
 882         }
 883         case MONO_TYPE_U: {
 884                 gint64 val = va_arg (ap, gint64);
 885                 printf ("[UINT:%lu]", val);
 886                 printf("]");
 887                 break;
 888         }
 889         case MONO_TYPE_STRING: {
 890                 MonoString *s = va_arg (ap, MonoString *);
 891 ;
 892                 if (s) {
 893                         g_assert (((MonoObject *)s)->vtable->klass == mono_defaults.string_class);
 894                         printf ("[STRING:%p:%s]", s, mono_string_to_utf8 (s));
 895                 } else
 896                         printf ("[STRING:null], ");
 897                 break;
 898         }
 899         case MONO_TYPE_CLASS:
 900         case MONO_TYPE_OBJECT: {
 901                 MonoObject *o = va_arg (ap, MonoObject *);
 902
 903                 if ((o) && (o->vtable)) {
 904                         if (o->vtable->klass == mono_defaults.boolean_class) {
 905                                 printf ("[BOOLEAN:%p:%d]", o, *((guint8 *)o + sizeof (MonoObject)));
 906                         } else if  (o->vtable->klass == mono_defaults.int32_class) {
 907                                 printf ("[INT32:%p:%d]", o, *((gint32 *)((char *)o + sizeof (MonoObject))));
 908                         } else if  (o->vtable->klass == mono_defaults.int64_class) {
 909                                 printf ("[INT64:%p:%ld]", o, *((gint64 *)((char *)o + sizeof (MonoObject))));
 910                         } else
 911                                 printf ("[%s.%s:%p]", o->vtable->klass->name_space, o->vtable->klass->name, o);
 912                 } else
 913                         printf ("[OBJECT:%p]", o);
 914
 915                 break;
 916         }
 917         case MONO_TYPE_PTR:
 918         case MONO_TYPE_FNPTR:
 919         case MONO_TYPE_ARRAY:
 920         case MONO_TYPE_SZARRAY: {
 921                 gpointer p = va_arg (ap, gpointer);
 922                 printf ("[result=%p]", p);
 923                 break;
 924         }
 925         case MONO_TYPE_I8: {
 926                 gint64 l =  va_arg (ap, gint64);
 927                 printf ("[LONG:%ld]", l);
 928                 break;
 929         }
 930         case MONO_TYPE_U8: {
 931                 guint64 l =  va_arg (ap, guint64);
 932                 printf ("[ULONG:%lu]", l);
 933                 break;
 934         }
 935         case MONO_TYPE_R4: {
 936                 double f = va_arg (ap, double);
 937                 printf ("[FLOAT4:%g]\n", f);
 938                 break;
 939         }
 940         case MONO_TYPE_R8: {
 941                 double f = va_arg (ap, double);
 942                 printf ("[FLOAT8:%g]\n", f);
 943                 break;
 944         }
 945         case MONO_TYPE_VALUETYPE: {
 946                 MonoMarshalType *info;
 947                 if (type->data.klass->enumtype) {
 948                         type = type->data.klass->enum_basetype;
 949                         goto handle_enum;
 950                 } else {
 951                         guint8 *p = va_arg (ap, gpointer);
 952                         int j, size, align;
 953
 954                         info = mono_marshal_load_type_info (type->data.klass);
 955
 956                         if ((info->native_size == sizeof(float)) &&
 957                             (info->num_fields  == 1) &&
 958                             (info->fields[0].field->type->type == MONO_TYPE_R4)) {
 959                                 double f = va_arg (ap, double);
 960                                 printf("[FLOAT4:%g]\n", (double) f);
 961                                 break;
 962                         }
 963
 964                         if ((info->native_size == sizeof(double)) &&
 965                             (info->num_fields  == 1) &&
 966                             (info->fields[0].field->type->type == MONO_TYPE_R8)) {
 967                                 double f = va_arg (ap, double);
 968                                 printf("[FLOAT8:%g]\n", f);
 969                                 break;
 970                         }
 971
 972                         size = mono_type_size (type, &align);
 973                         switch (size) {
 974                         case 1:
 975                         case 2:
 976                         case 4:
 977                         case 8:
 978                                 printf ("[");
 979                                 for (j = 0; p && j < size; j++)
 980                                         printf ("%02x,", p [j]);
 981                                 printf ("]\n");
 982                                 break;
 983                         default:
 984                                 printf ("[VALUETYPE]\n");
 985                         }
 986                 }
 987                 break;
 988         }
 989         case MONO_TYPE_TYPEDBYREF: {
 990                 guint8 *p = va_arg (ap, gpointer);
 991                 int j, size, align;
 992                 size = mono_type_size (type, &align);
 993                 switch (size) {
 994                 case 1:
 995                 case 2:
 996                 case 4:
 997                 case 8:
 998                         printf ("[");
 999                         for (j = 0; p && j < size; j++)
1000                                 printf ("%02x,", p [j]);
1001                         printf ("]\n");
1002                         break;
1003                 default:
1004                         printf ("[TYPEDBYREF]\n");
1005                 }
1006         }
1007                 break;
1008         default:
1009                 printf ("(unknown return type %x)",
1010                         mono_method_signature (method)->ret->type);
1011         }
1012
1013         ip = ((gint64) __builtin_return_address (0));
1014         printf (" ip: %p\n", (gpointer) ip);
1015 }
1016
1017 /*========================= End of Function ========================*/
1018
1019 /*------------------------------------------------------------------*/
1020 /*                                                                  */
1021 /* Name         - catch_SIGILL                                      */
1022 /*                                                                  */
1023 /* Function     - Catch SIGILL as a result of testing for long      */
1024 /*                displacement facility.                            */
1025 /*                                                                  */
1026 /*------------------------------------------------------------------*/
1027
1028 void
1029 catch_SIGILL(int sigNo, siginfo_t *info, void *act) {
1030
1031         has_ld = 0;
1032
1033 }
1034
1035 /*========================= End of Function ========================*/
1036
1037 /*------------------------------------------------------------------*/
1038 /*                                                                  */
1039 /* Name         - mono_arch_cpu_init                                */
1040 /*                                                                  */
1041 /* Function     - Perform CPU specific initialization to execute    */
1042 /*                managed code.                                     */
1043 /*                                                                  */
1044 /*------------------------------------------------------------------*/
1045
1046 void
1047 mono_arch_cpu_init (void)
1048 {
1049         struct sigaction sa,
1050                          *oldSa = NULL;
1051         guint mode = 1;
1052
1053         /*--------------------------------------*/
1054         /* Set default rounding mode for FP     */
1055         /*--------------------------------------*/
1056         __asm__ ("SRNM\t%0\n\t"
1057                 : : "m" (mode));
1058
1059         /*--------------------------------------*/
1060         /* Determine if we have long displace-  */
1061         /* ment facility on this processor      */
1062         /*--------------------------------------*/
1063         sa.sa_sigaction = catch_SIGILL;
1064         sigemptyset (&sa.sa_mask);
1065         sa.sa_flags = SA_SIGINFO;
1066
1067         sigaction (SIGILL, &sa, oldSa);
1068
1069         /*--------------------------------------*/
1070         /* We test by executing the STY inst    */
1071         /*--------------------------------------*/
1072         __asm__ ("LGHI\t0,1\n\t"
1073                  "LA\t1,%0\n\t"
1074                  ".byte\t0xe3,0x00,0x10,0x00,0x00,0x50\n\t"
1075                 : "=m" (has_ld) : : "0", "1");
1076
1077         sigaction (SIGILL, oldSa, NULL);
1078 }
1079
1080 /*========================= End of Function ========================*/
1081
1082 /*------------------------------------------------------------------*/
1083 /*                                                                  */
1084 /* Name         - mono_arch_cpu_optimizazions                       */
1085 /*                                                                  */
1086 /* Function     - Returns the optimizations supported on this CPU   */
1087 /*                                                                  */
1088 /*------------------------------------------------------------------*/
1089
1090 guint32
1091 mono_arch_cpu_optimizazions (guint32 *exclude_mask)
1092 {
1093         guint32 opts = 0;
1094
1095         /*----------------------------------------------------------*/
1096         /* No s390-specific optimizations yet                       */
1097         /*----------------------------------------------------------*/
1098         *exclude_mask = MONO_OPT_INLINE|MONO_OPT_LINEARS;
1099 //      *exclude_mask = MONO_OPT_INLINE;
1100         return opts;
1101 }
1102
1103 /*========================= End of Function ========================*/
1104
1105 /*------------------------------------------------------------------*/
1106 /*                                                                  */
1107 /* Name         -                                                   */
1108 /*                                                                  */
1109 /* Function     -                                                   */
1110 /*                                                                  */
1111 /*------------------------------------------------------------------*/
1112
1113 static gboolean
1114 is_regsize_var (MonoType *t) {
1115         if (t->byref)
1116                 return TRUE;
1117         switch (mono_type_get_underlying_type (t)->type) {
1118         case MONO_TYPE_I4:
1119         case MONO_TYPE_U4:
1120         case MONO_TYPE_I:
1121         case MONO_TYPE_I8:
1122         case MONO_TYPE_U8:
1123         case MONO_TYPE_U:
1124                 return TRUE;
1125         case MONO_TYPE_OBJECT:
1126         case MONO_TYPE_STRING:
1127         case MONO_TYPE_CLASS:
1128         case MONO_TYPE_SZARRAY:
1129         case MONO_TYPE_ARRAY:
1130                 return FALSE;
1131         case MONO_TYPE_VALUETYPE:
1132                 if (t->data.klass->enumtype)
1133                         return is_regsize_var (t->data.klass->enum_basetype);
1134                 return FALSE;
1135         }
1136         return FALSE;
1137 }
1138
1139 /*========================= End of Function ========================*/
1140
1141 /*------------------------------------------------------------------*/
1142 /*                                                                  */
1143 /* Name         - mono_arch_get_allocatable_int_vars                */
1144 /*                                                                  */
1145 /* Function     -                                                   */
1146 /*                                                                  */
1147 /*------------------------------------------------------------------*/
1148
1149 GList *
1150 mono_arch_get_allocatable_int_vars (MonoCompile *cfg)
1151 {
1152         GList *vars = NULL;
1153         int i;
1154
1155         for (i = 0; i < cfg->num_varinfo; i++) {
1156                 MonoInst *ins = cfg->varinfo [i];
1157                 MonoMethodVar *vmv = MONO_VARINFO (cfg, i);
1158
1159                 /* unused vars */
1160                 if (vmv->range.first_use.abs_pos >= vmv->range.last_use.abs_pos)
1161                         continue;
1162
1163                 if (ins->flags & (MONO_INST_VOLATILE|MONO_INST_INDIRECT) ||
1164                     (ins->opcode != OP_LOCAL && ins->opcode != OP_ARG))
1165                         continue;
1166
1167                 /* we can only allocate 32 bit values */
1168                 if (is_regsize_var (ins->inst_vtype)) {
1169                         g_assert (MONO_VARINFO (cfg, i)->reg == -1);
1170                         g_assert (i == vmv->idx);
1171                         vars = mono_varlist_insert_sorted (cfg, vars, vmv, FALSE);
1172                 }
1173         }
1174
1175         return vars;
1176 }
1177
1178 /*========================= End of Function ========================*/
1179
1180 /*------------------------------------------------------------------*/
1181 /*                                                                  */
1182 /* Name         - mono_arch_global_int_regs                         */
1183 /*                                                                  */
1184 /* Function     - Return a list of usable integer registers.        */
1185 /*                                                                  */
1186 /*------------------------------------------------------------------*/
1187
1188 GList *
1189 mono_arch_get_global_int_regs (MonoCompile *cfg)
1190 {
1191         GList *regs = NULL;
1192         MonoMethodHeader *header;
1193         int i, top = 13;
1194
1195         header = mono_method_get_header (cfg->method);
1196         if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
1197                 cfg->frame_reg = s390_r11;
1198
1199         for (i = 8; i < top; ++i) {
1200                 if (cfg->frame_reg != i)
1201                         regs = g_list_prepend (regs, GUINT_TO_POINTER (i));
1202         }
1203
1204         return regs;
1205 }
1206
1207 /*========================= End of Function ========================*/
1208
1209 /*------------------------------------------------------------------*/
1210 /*                                                                  */
1211 /* Name         -  mono_arch_flush_icache                           */
1212 /*                                                                  */
1213 /* Function     -  Flush the CPU icache.                            */
1214 /*                                                                  */
1215 /*------------------------------------------------------------------*/
1216
1217 void
1218 mono_arch_flush_icache (guint8 *code, gint size)
1219 {
1220 }
1221
1222 /*========================= End of Function ========================*/
1223
1224 /*------------------------------------------------------------------*/
1225 /*                                                                  */
1226 /* Name         - add_general                                       */
1227 /*                                                                  */
1228 /* Function     - Determine code and stack size incremements for a  */
1229 /*                parameter.                                        */
1230 /*                                                                  */
1231 /*------------------------------------------------------------------*/
1232
1233 static void inline
1234 add_general (guint *gr, size_data *sz, ArgInfo *ainfo)
1235 {
1236         if (*gr > S390_LAST_ARG_REG) {
1237                 sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1238                 ainfo->offset   = sz->stack_size;
1239                 ainfo->reg      = STK_BASE;
1240                 ainfo->regtype  = RegTypeBase;
1241                 sz->stack_size += sizeof(long);
1242                 sz->local_size += sizeof(long);
1243                 sz->offStruct  += sizeof(long);
1244                 sz->code_size  += 12;
1245         } else {
1246                 ainfo->reg      = *gr;
1247                 sz->code_size  += 8;
1248         }
1249         (*gr) ++;
1250 }
1251
1252 /*========================= End of Function ========================*/
1253
1254 /*------------------------------------------------------------------*/
1255 /*                                                                  */
1256 /* Name         - add_stackParm                                     */
1257 /*                                                                  */
1258 /* Function     - Determine code and stack size incremements for a  */
1259 /*                parameter.                                        */
1260 /*                                                                  */
1261 /*------------------------------------------------------------------*/
1262
1263 static void inline
1264 add_stackParm (guint *gr, size_data *sz, ArgInfo *ainfo, gint size)
1265 {
1266         if (*gr > S390_LAST_ARG_REG) {
1267                 sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1268                 ainfo->reg      = STK_BASE;
1269                 sz->stack_size += sizeof(gpointer);
1270                 sz->offStruct  += sizeof(gpointer);
1271         } else {
1272                 ainfo->reg      = *gr;
1273         }
1274         (*gr) ++;
1275         ainfo->offset   = sz->stack_size;
1276         ainfo->offparm  = sz->offset;
1277         sz->offset      = S390_ALIGN(sz->offset+size, sizeof(long));
1278         ainfo->size     = size;
1279         ainfo->regtype  = RegTypeStructByAddr;
1280         ainfo->vtsize   = size;
1281         sz->parm_size  += size;
1282 }
1283
1284 /*========================= End of Function ========================*/
1285
1286 /*------------------------------------------------------------------*/
1287 /*                                                                  */
1288 /* Name         - add_float                                         */
1289 /*                                                                  */
1290 /* Function     - Determine code and stack size incremements for a  */
1291 /*                float parameter.                                  */
1292 /*                                                                  */
1293 /*------------------------------------------------------------------*/
1294
1295 static void inline
1296 add_float (guint *fr,  size_data *sz, ArgInfo *ainfo)
1297 {
1298         if ((*fr) <= S390_LAST_FPARG_REG) {
1299                 ainfo->regtype = RegTypeFP;
1300                 ainfo->reg     = *fr;
1301                 sz->code_size += 4;
1302                 (*fr) += 2;
1303         }
1304         else {
1305                 ainfo->offset   = sz->stack_size;
1306                 ainfo->reg      = STK_BASE;
1307                 ainfo->regtype  = RegTypeBase;
1308                 sz->code_size  += 4;
1309                 sz->stack_size += sizeof(double);
1310                 sz->local_size += sizeof(double);
1311                 sz->offStruct  += sizeof(double);
1312         }
1313 }
1314
1315 /*========================= End of Function ========================*/
1316
1317 /*------------------------------------------------------------------*/
1318 /*                                                                  */
1319 /* Name         - calculate_sizes                                   */
1320 /*                                                                  */
1321 /* Function     - Determine the amount of space required for code   */
1322 /*                and stack. In addition determine starting points  */
1323 /*                for stack-based parameters, and area for struct-  */
1324 /*                ures being returned on the stack.                 */
1325 /*                                                                  */
1326 /*------------------------------------------------------------------*/
1327
1328 static CallInfo *
1329 calculate_sizes (MonoMethodSignature *sig, size_data *sz,
1330                  gboolean string_ctor)
1331 {
1332         guint i, fr, gr, size;
1333         int nParm = sig->hasthis + sig->param_count;
1334         guint32 simpletype, align;
1335         CallInfo *cinfo = g_malloc0 (sizeof (CallInfo) + sizeof (ArgInfo) * nParm);
1336
1337         fr                = 0;
1338         gr                = s390_r2;
1339         nParm             = 0;
1340         cinfo->struct_ret = 0;
1341         sz->retStruct     = 0;
1342         sz->offset        = 0;
1343         sz->offStruct     = S390_MINIMAL_STACK_SIZE;
1344         sz->stack_size    = S390_MINIMAL_STACK_SIZE;
1345         sz->code_size     = 0;
1346         sz->parm_size     = 0;
1347         sz->local_size    = 0;
1348
1349         /*----------------------------------------------------------*/
1350         /* We determine the size of the return code/stack in case we*/
1351         /* need to reserve a register to be used to address a stack */
1352         /* area that the callee will use.                           */
1353         /*----------------------------------------------------------*/
1354
1355         simpletype = mono_type_get_underlying_type (sig->ret)->type;
1356 enum_retvalue:
1357         switch (simpletype) {
1358                 case MONO_TYPE_BOOLEAN:
1359                 case MONO_TYPE_I1:
1360                 case MONO_TYPE_U1:
1361                 case MONO_TYPE_I2:
1362                 case MONO_TYPE_U2:
1363                 case MONO_TYPE_CHAR:
1364                 case MONO_TYPE_I4:
1365                 case MONO_TYPE_U4:
1366                 case MONO_TYPE_I:
1367                 case MONO_TYPE_U:
1368                 case MONO_TYPE_CLASS:
1369                 case MONO_TYPE_OBJECT:
1370                 case MONO_TYPE_SZARRAY:
1371                 case MONO_TYPE_ARRAY:
1372                 case MONO_TYPE_PTR:
1373                 case MONO_TYPE_FNPTR:
1374                 case MONO_TYPE_STRING:
1375                         cinfo->ret.reg = s390_r2;
1376                         sz->code_size += 4;
1377                         break;
1378                 case MONO_TYPE_R4:
1379                 case MONO_TYPE_R8:
1380                         cinfo->ret.reg = s390_f0;
1381                         sz->code_size += 4;
1382                         break;
1383                 case MONO_TYPE_I8:
1384                 case MONO_TYPE_U8:
1385                         cinfo->ret.reg = s390_r2;
1386                         sz->code_size += 4;
1387                         break;
1388                 case MONO_TYPE_GENERICINST:
1389                         if (!mono_type_generic_inst_is_valuetype (sig->ret)) {
1390                                 cinfo->ret.reg = s390_r2;
1391                                 sz->code_size += 4;
1392                                 break;
1393                         }
1394                         /* Fall through */
1395                 case MONO_TYPE_VALUETYPE: {
1396                         MonoClass *klass = mono_class_from_mono_type (sig->ret);
1397                         if (sig->ret->data.klass->enumtype) {
1398                                 simpletype = sig->ret->data.klass->enum_basetype->type;
1399                                 goto enum_retvalue;
1400                         }
1401                         if (sig->pinvoke)
1402                                 size = mono_class_native_size (klass, &align);
1403                         else
1404                                 size = mono_class_value_size (klass, &align);
1405
1406                         cinfo->ret.reg    = s390_r2;
1407                         cinfo->struct_ret = 1;
1408                         cinfo->ret.size   = size;
1409                         cinfo->ret.vtsize = size;
1410                         gr++;
1411                         break;
1412                 }
1413                 case MONO_TYPE_TYPEDBYREF:
1414                         size = sizeof (MonoTypedRef);
1415                         cinfo->ret.reg    = s390_r2;
1416                         cinfo->struct_ret = 1;
1417                         cinfo->ret.size   = size;
1418                         cinfo->ret.vtsize = size;
1419                         gr++;
1420                         break;
1421                 case MONO_TYPE_VOID:
1422                         break;
1423                 default:
1424                         g_error ("Can't handle as return value 0x%x", sig->ret->type);
1425         }
1426
1427         if (sig->hasthis) {
1428                 cinfo->args[nParm].size = sizeof(gpointer);
1429                 add_general (&gr, sz, cinfo->args+nParm);
1430                 nParm++;
1431         }
1432
1433         /*----------------------------------------------------------*/
1434         /* We determine the size of the parameter code and stack    */
1435         /* requirements by checking the types and sizes of the      */
1436         /* parameters.                                              */
1437         /*----------------------------------------------------------*/
1438
1439         for (i = 0; i < sig->param_count; ++i) {
1440                 /*--------------------------------------------------*/
1441                 /* Handle vararg type calls. All args are put on    */
1442                 /* the stack.                                       */
1443                 /*--------------------------------------------------*/
1444                 if ((sig->call_convention == MONO_CALL_VARARG) &&
1445                     (i == sig->sentinelpos)) {
1446                         gr = S390_LAST_ARG_REG + 1;
1447                         add_general (&gr, sz, &cinfo->sigCookie);
1448                 }
1449
1450                 if (sig->params [i]->byref) {
1451                         add_general (&gr, sz, cinfo->args+nParm);
1452                         cinfo->args[nParm].size = sizeof(gpointer);
1453                         nParm++;
1454                         continue;
1455                 }
1456
1457                 simpletype = mono_type_get_underlying_type(sig->params [i])->type;
1458                 cinfo->args[nParm].type = simpletype;
1459                 switch (simpletype) {
1460                 case MONO_TYPE_BOOLEAN:
1461                 case MONO_TYPE_I1:
1462                 case MONO_TYPE_U1:
1463                         cinfo->args[nParm].size = sizeof(char);
1464                         add_general (&gr, sz, cinfo->args+nParm);
1465                         nParm++;
1466                         break;
1467                 case MONO_TYPE_I2:
1468                 case MONO_TYPE_U2:
1469                 case MONO_TYPE_CHAR:
1470                         cinfo->args[nParm].size = sizeof(short);
1471                         add_general (&gr, sz, cinfo->args+nParm);
1472                         nParm++;
1473                         break;
1474                 case MONO_TYPE_I4:
1475                 case MONO_TYPE_U4:
1476                         cinfo->args[nParm].size = sizeof(int);
1477                         add_general (&gr, sz, cinfo->args+nParm);
1478                         nParm++;
1479                         break;
1480                 case MONO_TYPE_I:
1481                 case MONO_TYPE_U:
1482                 case MONO_TYPE_PTR:
1483                 case MONO_TYPE_FNPTR:
1484                 case MONO_TYPE_CLASS:
1485                 case MONO_TYPE_OBJECT:
1486                 case MONO_TYPE_STRING:
1487                 case MONO_TYPE_SZARRAY:
1488                 case MONO_TYPE_ARRAY:
1489                         cinfo->args[nParm].size = sizeof(gpointer);
1490                         add_general (&gr, sz, cinfo->args+nParm);
1491                         nParm++;
1492                         break;
1493                 case MONO_TYPE_I8:
1494                 case MONO_TYPE_U8:
1495                         cinfo->args[nParm].size = sizeof(long long);
1496                         add_general (&gr, sz, cinfo->args+nParm);
1497                         nParm++;
1498                         break;
1499                 case MONO_TYPE_R4:
1500                         cinfo->args[nParm].size = sizeof(float);
1501                         add_float (&fr, sz, cinfo->args+nParm);
1502                         nParm++;
1503                         break;
1504                 case MONO_TYPE_R8:
1505                         cinfo->args[nParm].size = sizeof(double);
1506                         add_float (&fr, sz, cinfo->args+nParm);
1507                         nParm++;
1508                         break;
1509                 case MONO_TYPE_GENERICINST:
1510                         if (!mono_type_generic_inst_is_valuetype (sig->params [i])) {
1511                                 cinfo->args[nParm].size = sizeof(gpointer);
1512                                 add_general (&gr, sz, cinfo->args+nParm);
1513                                 nParm++;
1514                                 break;
1515                         }
1516                         /* Fall through */
1517                 case MONO_TYPE_VALUETYPE: {
1518                         MonoMarshalType *info;
1519                         MonoClass *klass = mono_class_from_mono_type (sig->params [i]);
1520                         if (sig->pinvoke)
1521                                 size = mono_class_native_size (klass, &align);
1522                         else
1523                                 size = mono_class_value_size (klass, &align);
1524
1525                         info = mono_marshal_load_type_info (klass);
1526
1527                         if ((info->native_size == sizeof(float)) &&
1528                             (info->num_fields  == 1) &&
1529                             (info->fields[0].field->type->type == MONO_TYPE_R4)) {
1530                                 cinfo->args[nParm].size = sizeof(float);
1531                                 add_float(&fr, sz, cinfo->args+nParm);
1532                                 break;
1533                         }
1534
1535                         if ((info->native_size == sizeof(double)) &&
1536                             (info->num_fields  == 1) &&
1537                             (info->fields[0].field->type->type == MONO_TYPE_R8)) {
1538                                 cinfo->args[nParm].size = sizeof(double);
1539                                 add_float(&fr, sz, cinfo->args+nParm);
1540                                 break;
1541                         }
1542
1543                         cinfo->args[nParm].vtsize  = 0;
1544                         cinfo->args[nParm].size    = 0;
1545
1546                         switch (size) {
1547                                 /*----------------------------------*/
1548                                 /* On S/390, structures of size 1,  */
1549                                 /* 2, 4, and 8 bytes are passed in  */
1550                                 /* (a) register(s).                 */
1551                                 /*----------------------------------*/
1552                                 case 0:
1553                                 case 1:
1554                                 case 2:
1555                                 case 4:
1556                                 case 8:
1557                                         add_general(&gr, sz, cinfo->args+nParm);
1558                                         cinfo->args[nParm].size    = size;
1559                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1560                                         nParm++;
1561                                         sz->local_size            += sizeof(long);
1562                                         break;
1563                                 default:
1564                                         add_stackParm(&gr, sz, cinfo->args+nParm, size);
1565                                         nParm++;
1566                         }
1567                 }
1568                         break;
1569                 case MONO_TYPE_TYPEDBYREF: {
1570                         int size = sizeof (MonoTypedRef);
1571
1572                         cinfo->args[nParm].vtsize  = 0;
1573                         cinfo->args[nParm].size    = 0;
1574
1575                         switch (size) {
1576                                 /*----------------------------------*/
1577                                 /* On S/390, structures of size 1,  */
1578                                 /* 2, 4, and 8 bytes are passed in  */
1579                                 /* (a) register(s).                 */
1580                                 /*----------------------------------*/
1581                                 case 0:
1582                                 case 1:
1583                                 case 2:
1584                                 case 4:
1585                                 case 8:
1586                                         add_general(&gr, sz, cinfo->args+nParm);
1587                                         cinfo->args[nParm].size    = size;
1588                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1589                                         nParm++;
1590                                         sz->local_size            += sizeof(long);
1591                                         break;
1592                                 default:
1593                                         add_stackParm(&gr, sz, cinfo->args+nParm, size);
1594                                         nParm++;
1595                         }
1596                 }
1597                         break;
1598                 default:
1599                         g_error ("Can't trampoline 0x%x", sig->params [i]->type);
1600                 }
1601         }
1602
1603         /*----------------------------------------------------------*/
1604         /* Handle the case where there are no implicit arguments    */
1605         /*----------------------------------------------------------*/
1606         if ((sig->call_convention == MONO_CALL_VARARG) &&
1607             (sig->param_count == sig->sentinelpos)) {
1608                 gr = S390_LAST_ARG_REG + 1;
1609                 add_general (&gr, sz, &cinfo->sigCookie);
1610         }
1611
1612         /*----------------------------------------------------------*/
1613         /* If we are passing a structure back then if it won't be   */
1614         /* in a register(s) then we make room at the end of the     */
1615         /* parameters that may have been placed on the stack        */
1616         /*----------------------------------------------------------*/
1617         if (cinfo->struct_ret) {
1618                 cinfo->ret.offset = sz->stack_size;
1619                 switch (cinfo->ret.size) {
1620                 case 0:
1621                 case 1:
1622                 case 2:
1623                 case 4:
1624                 case 8:
1625                         break;
1626                 default:
1627                         sz->stack_size   += S390_ALIGN(cinfo->ret.size, align);
1628                 }
1629         }
1630
1631         cinfo->lastgr   = gr;
1632         sz->stack_size  = sz->stack_size + sz->local_size + sz->parm_size +
1633                           sz->offset;
1634         sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1635
1636         return (cinfo);
1637 }
1638
1639 /*========================= End of Function ========================*/
1640
1641 /*------------------------------------------------------------------*/
1642 /*                                                                  */
1643 /* Name         - mono_arch_allocate_vars                           */
1644 /*                                                                  */
1645 /* Function     - Set var information according to the calling      */
1646 /*                convention for S/390. The local var stuff should  */
1647 /*                most likely be split in another method.           */
1648 /*                                                                  */
1649 /* Parameter    - @m - Compile unit.                                */
1650 /*                                                                  */
1651 /*------------------------------------------------------------------*/
1652
1653 void
1654 mono_arch_allocate_vars (MonoCompile *cfg)
1655 {
1656         MonoMethodSignature *sig;
1657         MonoMethodHeader *header;
1658         MonoInst *inst;
1659         CallInfo *cinfo;
1660         size_data sz;
1661         int iParm, iVar, offset, size, align, curinst;
1662         int frame_reg = STK_BASE;
1663         int sArg, eArg;
1664
1665         header  = mono_method_get_header (cfg->method);
1666
1667         cfg->flags |= MONO_CFG_HAS_SPILLUP;
1668
1669         /*---------------------------------------------------------*/
1670         /* We use the frame register also for any method that has  */
1671         /* filter clauses. This way, when the handlers are called, */
1672         /* the code will reference local variables using the frame */
1673         /* reg instead of the stack pointer: if we had to restore  */
1674         /* the stack pointer, we'd corrupt the method frames that  */
1675         /* are already on the stack (since filters get called      */
1676         /* before stack unwinding happens) when the filter code    */
1677         /* would call any method.                                  */
1678         /*---------------------------------------------------------*/
1679         if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
1680                 frame_reg = s390_r11;
1681
1682         cfg->frame_reg = frame_reg;
1683
1684         if (frame_reg != STK_BASE)
1685                 cfg->used_int_regs |= 1 << frame_reg;
1686
1687         sig     = mono_method_signature (cfg->method);
1688
1689         cinfo   = calculate_sizes (sig, &sz, sig->pinvoke);
1690
1691         if (cinfo->struct_ret) {
1692                 cfg->ret->opcode = OP_REGVAR;
1693                 cfg->ret->inst_c0 = s390_r2;
1694         } else {
1695                 switch (mono_type_get_underlying_type (sig->ret)->type) {
1696                 case MONO_TYPE_VOID:
1697                         break;
1698                 default:
1699                         cfg->ret->opcode = OP_REGVAR;
1700                         cfg->ret->dreg   = s390_r2;
1701                         break;
1702                 }
1703         }
1704
1705         /*--------------------------------------------------------------*/
1706         /* local vars are at a positive offset from the stack pointer   */
1707         /* also note that if the function uses alloca, we use s390_r11  */
1708         /* to point at the local variables.                             */
1709         /* add parameter area size for called functions                 */
1710         /*--------------------------------------------------------------*/
1711         offset          = (cfg->param_area + S390_MINIMAL_STACK_SIZE);
1712         cfg->sig_cookie = 0;
1713
1714         if (cinfo->struct_ret) {
1715                 inst               = cfg->ret;
1716                 offset             = S390_ALIGN(offset, sizeof(gpointer));
1717                 inst->inst_offset  = offset;
1718                 inst->opcode       = OP_REGOFFSET;
1719                 inst->inst_basereg = frame_reg;
1720                 offset            += sizeof(gpointer);
1721                 if ((sig->call_convention == MONO_CALL_VARARG) &&
1722                     (!retFitsInReg (cinfo->ret.size)))
1723                         cfg->sig_cookie += cinfo->ret.size;
1724         }
1725
1726         if (sig->hasthis) {
1727                 inst = cfg->varinfo [0];
1728                 if (inst->opcode != OP_REGVAR) {
1729                         inst->opcode       = OP_REGOFFSET;
1730                         inst->inst_basereg = frame_reg;
1731                         offset             = S390_ALIGN(offset, sizeof(gpointer));
1732                         inst->inst_offset  = offset;
1733                         offset            += sizeof (gpointer);
1734                 }
1735                 curinst = sArg = 1;
1736         } else {
1737                 curinst = sArg = 0;
1738         }
1739
1740         eArg = sig->param_count + sArg;
1741
1742         if (sig->call_convention == MONO_CALL_VARARG)
1743                 cfg->sig_cookie += S390_MINIMAL_STACK_SIZE;
1744
1745         for (iParm = sArg; iParm < eArg; ++iParm) {
1746                 inst = cfg->varinfo [curinst];
1747                 if (inst->opcode != OP_REGVAR) {
1748                         switch (cinfo->args[iParm].regtype) {
1749                                 case RegTypeStructByAddr :
1750                                 if (cinfo->args[iParm].reg == STK_BASE) {
1751                                         inst->opcode       = OP_S390_LOADARG;
1752                                         inst->inst_basereg = frame_reg;
1753                                         offset             = S390_ALIGN(offset, sizeof(long));
1754                                         inst->inst_offset  = offset;
1755                                         size               = abs(cinfo->args[iParm].vtsize);
1756                                         inst->backend.arg_info     = cinfo->args[iParm].offset;
1757                                 } else {
1758                                         inst->opcode       = OP_S390_ARGREG;
1759                                         inst->inst_basereg = frame_reg;
1760                                         size               = sizeof(gpointer);
1761                                         offset             = S390_ALIGN(offset, size);
1762                                         inst->inst_offset  = offset;
1763                                         inst->backend.arg_info     = cinfo->args[iParm].offset;
1764                                 }
1765                                         break;
1766                                 case RegTypeStructByVal :
1767                                         inst->opcode       = OP_S390_ARGPTR;
1768                                         inst->inst_basereg = frame_reg;
1769                                         size               = cinfo->args[iParm].size;
1770                                         offset             = S390_ALIGN(offset, size);
1771                                         inst->inst_offset  = offset;
1772                                         inst->backend.arg_info     = cinfo->args[iParm].offset;
1773                                         break;
1774                                 default :
1775                                 if (cinfo->args[iParm].reg != STK_BASE) {
1776                                         inst->opcode       = OP_REGOFFSET;
1777                                         inst->inst_basereg = frame_reg;
1778                                         size               = (cinfo->args[iParm].size < 8
1779                                                               ? sizeof(int)
1780                                                               : sizeof(long));
1781                                         offset             = S390_ALIGN(offset, size);
1782                                         inst->inst_offset  = offset;
1783                                 } else {
1784                                         inst->opcode       = OP_S390_STKARG;
1785                                         inst->inst_basereg = frame_reg;
1786                                         size               = ((cinfo->args[iParm].size < 8)
1787                                                               ? 8 - cinfo->args[iParm].size
1788                                                               : 0);
1789                                         inst->inst_offset  = cinfo->args[iParm].offset +
1790                                                              size;
1791                                         inst->backend.arg_info       = 0;
1792                                         size               = sizeof(long);
1793                                 }
1794                         }
1795                         if ((sig->call_convention == MONO_CALL_VARARG) &&
1796                             (cinfo->args[iParm].regtype != RegTypeGeneral) &&
1797                             (iParm < sig->sentinelpos))
1798                                 cfg->sig_cookie += size;
1799
1800                         offset += size;
1801                 }
1802                 curinst++;
1803         }
1804
1805         curinst = cfg->locals_start;
1806         for (iVar = curinst; iVar < cfg->num_varinfo; ++iVar) {
1807                 inst = cfg->varinfo [iVar];
1808                 if ((inst->flags & MONO_INST_IS_DEAD) ||
1809                     (inst->opcode == OP_REGVAR))
1810                         continue;
1811
1812                 /*--------------------------------------------------*/
1813                 /* inst->backend.is_pinvoke indicates native sized value types, */
1814                 /* this is used by the pinvoke wrappers when they   */
1815                 /* call functions returning structure               */
1816                 /*--------------------------------------------------*/
1817                 if (inst->backend.is_pinvoke && MONO_TYPE_ISSTRUCT (inst->inst_vtype))
1818                         size = mono_class_native_size (mono_class_from_mono_type(inst->inst_vtype), &align);
1819                 else
1820                         size = mono_type_size (inst->inst_vtype, &align);
1821
1822                 offset             = S390_ALIGN(offset, align);
1823                 inst->inst_offset  = offset;
1824                 inst->opcode       = OP_REGOFFSET;
1825                 inst->inst_basereg = frame_reg;
1826                 offset            += size;
1827                 DEBUG (g_print("allocating local %d to %ld, size: %d\n",
1828                                 iVar, inst->inst_offset, size));
1829         }
1830
1831         /*------------------------------------------------------*/
1832         /* Allow space for the trace method stack area if needed*/
1833         /*------------------------------------------------------*/
1834         if (mono_jit_trace_calls != NULL && mono_trace_eval (cfg->method))
1835                 offset += S390_TRACE_STACK_SIZE;
1836
1837         /*------------------------------------------------------*/
1838         /* Reserve space to save LMF and caller saved registers */
1839         /*------------------------------------------------------*/
1840         if (cfg->method->save_lmf)
1841                 offset += sizeof (MonoLMF);
1842
1843         /*------------------------------------------------------*/
1844         /* align the offset                                     */
1845         /*------------------------------------------------------*/
1846         cfg->stack_offset = S390_ALIGN(offset, S390_STACK_ALIGNMENT);
1847
1848 }
1849
1850 /*========================= End of Function ========================*/
1851
1852 /*------------------------------------------------------------------*/
1853 /*                                                                  */
1854 /* Name         - mono_arch_call_opcode                             */
1855 /*                                                                  */
1856 /* Function     - Take the arguments and generate the arch-specific */
1857 /*                instructions to properly call the function. This  */
1858 /*                includes pushing, moving argments to the correct  */
1859 /*                etc.                                              */
1860 /*                                                                  */
1861 /*------------------------------------------------------------------*/
1862
1863 MonoCallInst*
1864 mono_arch_call_opcode (MonoCompile *cfg, MonoBasicBlock* bb,
1865                        MonoCallInst *call, int is_virtual) {
1866         MonoInst *in;
1867         MonoCallArgParm *arg;
1868         MonoMethodSignature *sig;
1869         int i, n, lParamArea;
1870         CallInfo *cinfo;
1871         ArgInfo *ainfo;
1872         size_data sz;
1873
1874         sig = call->signature;
1875         n = sig->param_count + sig->hasthis;
1876         DEBUG (g_print ("Call requires: %d parameters\n",n));
1877
1878         cinfo = calculate_sizes (sig, &sz, sig->pinvoke);
1879
1880         call->stack_usage = MAX(sz.stack_size, call->stack_usage);
1881         lParamArea        = MAX((call->stack_usage - S390_MINIMAL_STACK_SIZE - sz.parm_size), 0);
1882         cfg->param_area   = MAX (((signed) cfg->param_area), lParamArea);
1883         cfg->flags       |= MONO_CFG_HAS_CALLS;
1884
1885         if (cinfo->struct_ret)
1886                 call->used_iregs |= 1 << cinfo->ret.reg;
1887
1888         for (i = 0; i < n; ++i) {
1889                 ainfo = cinfo->args + i;
1890
1891                 if (!(sig->pinvoke) &&
1892                     (sig->call_convention == MONO_CALL_VARARG) &&
1893                     (i == sig->sentinelpos)) {
1894                         emit_sig_cookie (cfg, call, cinfo, ainfo->size);
1895                 }
1896
1897                 if (is_virtual && i == 0) {
1898                         /* the argument will be attached to the call instrucion */
1899                         in = call->args [i];
1900                         call->used_iregs |= 1 << ainfo->reg;
1901                 } else {
1902                         MONO_INST_NEW_CALL_ARG (cfg, arg, OP_OUTARG);
1903                         in                  = call->args [i];
1904                         arg->ins.cil_code   = in->cil_code;
1905                         arg->ins.inst_left  = in;
1906                         arg->ins.type       = in->type;
1907
1908                         /* prepend, we'll need to reverse them later */
1909                         arg->ins.next       = call->out_args;
1910                         call->out_args      = (MonoInst *) arg;
1911                         arg->ins.inst_right = (MonoInst *) call;
1912                         if (ainfo->regtype == RegTypeGeneral) {
1913                                 arg->ins.backend.reg3 = ainfo->reg;
1914                                 call->used_iregs |= 1 << ainfo->reg;
1915                         } else if (ainfo->regtype == RegTypeStructByAddr) {
1916                                 call->used_iregs |= 1 << ainfo->reg;
1917                                 arg->ins.sreg1    = ainfo->reg;
1918                                 arg->ins.opcode   = OP_OUTARG_VT;
1919                                 arg->size         = -ainfo->vtsize;
1920                                 arg->offset       = ainfo->offset;
1921                                 arg->offPrm       = ainfo->offparm + sz.offStruct;
1922                         } else if (ainfo->regtype == RegTypeStructByVal) {
1923                                 if (ainfo->reg != STK_BASE)
1924                                         call->used_iregs |= 1 << ainfo->reg;
1925                                 arg->ins.sreg1  = ainfo->reg;
1926                                 arg->ins.opcode = OP_OUTARG_VT;
1927                                 arg->size       = ainfo->size;
1928                                 arg->offset     = ainfo->offset;
1929                                 arg->offPrm     = ainfo->offparm + sz.offStruct;
1930                         } else if (ainfo->regtype == RegTypeBase) {
1931                                 arg->ins.opcode   = OP_OUTARG_MEMBASE;
1932                                 arg->ins.sreg1    = ainfo->reg;
1933                                 arg->size         = ainfo->size;
1934                                 arg->offset       = ainfo->offset;
1935                                 call->used_iregs |= 1 << ainfo->reg;
1936                         } else if (ainfo->regtype == RegTypeFP) {
1937                                 arg->ins.backend.reg3 = ainfo->reg;
1938                                 call->used_fregs |= 1 << ainfo->reg;
1939                                 if (ainfo->size == 4)
1940                                         arg->ins.opcode = OP_OUTARG_R4;
1941                                 else
1942                                         arg->ins.opcode = OP_OUTARG_R8;
1943                         } else {
1944                                 g_assert_not_reached ();
1945                         }
1946                 }
1947         }
1948
1949         /*
1950          * Handle the case where there are no implicit arguments
1951          */
1952         if (!(sig->pinvoke) &&
1953             (sig->call_convention == MONO_CALL_VARARG) &&
1954             (n == sig->sentinelpos)) {
1955                 emit_sig_cookie (cfg, call, cinfo, sizeof(MonoType *));
1956         }
1957
1958         /*
1959          * Reverse the call->out_args list.
1960          */
1961         {
1962                 MonoInst *prev = NULL, *list = call->out_args, *next;
1963                 while (list) {
1964                         next = list->next;
1965                         list->next = prev;
1966                         prev = list;
1967                         list = next;
1968                 }
1969                 call->out_args = prev;
1970         }
1971
1972         g_free (cinfo);
1973         return call;
1974 }
1975
1976 /*========================= End of Function ========================*/
1977
1978 /*------------------------------------------------------------------*/
1979 /*                                                                  */
1980 /* Name         - emit_sig_cookie.                                  */
1981 /*                                                                  */
1982 /* Function     - For variable length parameter lists construct a   */
1983 /*                signature cookie and emit it.                     */
1984 /*                                                                  */
1985 /*------------------------------------------------------------------*/
1986
1987 static void
1988 emit_sig_cookie (MonoCompile *cfg, MonoCallInst *call,
1989                  CallInfo *cinfo, int argSize)
1990 {
1991         MonoCallArgParm *arg;
1992         MonoMethodSignature *tmpSig;
1993         MonoInst *sigArg;
1994
1995         cfg->disable_aot = TRUE;
1996
1997         /*----------------------------------------------------------*/
1998         /* mono_ArgIterator_Setup assumes the signature cookie is   */
1999         /* passed first and all the arguments which were before it  */
2000         /* passed on the stack after the signature. So compensate   */
2001         /* by passing a different signature.                        */
2002         /*----------------------------------------------------------*/
2003         tmpSig = mono_metadata_signature_dup (call->signature);
2004         tmpSig->param_count -= call->signature->sentinelpos;
2005         tmpSig->sentinelpos  = 0;
2006         if (tmpSig->param_count > 0)
2007                 memcpy (tmpSig->params,
2008                         call->signature->params + call->signature->sentinelpos,
2009                         tmpSig->param_count * sizeof(MonoType *));
2010
2011         MONO_INST_NEW (cfg, sigArg, OP_ICONST);
2012         sigArg->inst_p0 = tmpSig;
2013
2014         MONO_INST_NEW_CALL_ARG (cfg, arg, OP_OUTARG_MEMBASE);
2015         arg->ins.inst_left   = sigArg;
2016         arg->ins.inst_right  = (MonoInst *) call;
2017         arg->size            = argSize;
2018         arg->offset          = cinfo->sigCookie.offset;
2019
2020         /* prepend, we'll need to reverse them later */
2021         arg->ins.next       = call->out_args;
2022         call->out_args      = (MonoInst *) arg;
2023 }
2024
2025 /*========================= End of Function ========================*/
2026
2027 /*------------------------------------------------------------------*/
2028 /*                                                                  */
2029 /* Name         - mono_arch_instrument_mem_needs                    */
2030 /*                                                                  */
2031 /* Function     - Allow tracing to work with this interface (with   */
2032 /*                an optional argument).                            */
2033 /*                                                                  */
2034 /*------------------------------------------------------------------*/
2035
2036 void
2037 mono_arch_instrument_mem_needs (MonoMethod *method, int *stack, int *code)
2038 {
2039         /* no stack room needed now (may be needed for FASTCALL-trace support) */
2040         *stack = 0;
2041         /* split prolog-epilog requirements? */
2042         *code = 50; /* max bytes needed: check this number */
2043 }
2044
2045 /*========================= End of Function ========================*/
2046
2047 /*------------------------------------------------------------------*/
2048 /*                                                                  */
2049 /* Name         - mono_arch_instrument_prolog                       */
2050 /*                                                                  */
2051 /* Function     - Create an "instrumented" prolog.                  */
2052 /*                                                                  */
2053 /*------------------------------------------------------------------*/
2054
2055 void*
2056 mono_arch_instrument_prolog (MonoCompile *cfg, void *func, void *p,
2057                              gboolean enable_arguments)
2058 {
2059         guchar  *code = p;
2060         int     parmOffset,
2061                 fpOffset,
2062                 baseReg;
2063
2064         parmOffset = cfg->stack_usage - S390_TRACE_STACK_SIZE;
2065         if (cfg->method->save_lmf)
2066                 parmOffset -= sizeof(MonoLMF);
2067         fpOffset   = parmOffset + (5*sizeof(gpointer));
2068         if ((!has_ld) && (fpOffset > 4096)) {
2069                 s390_lgr (code, s390_r12, STK_BASE);
2070                 baseReg = s390_r12;
2071                 while (fpOffset > 4096) {
2072                         s390_aghi (code, baseReg, 4096);
2073                         fpOffset   -= 4096;
2074                         parmOffset -= 4096;
2075                 }
2076         } else {
2077                 baseReg = STK_BASE;
2078         }
2079
2080         s390_stmg (code, s390_r2, s390_r6, STK_BASE, parmOffset);
2081         if (has_ld) {
2082                 s390_stdy (code, s390_f0, 0, STK_BASE, fpOffset);
2083                 s390_stdy (code, s390_f2, 0, STK_BASE, fpOffset+sizeof(gdouble));
2084                 s390_stdy (code, s390_f4, 0, STK_BASE, fpOffset+2*sizeof(gdouble));
2085                 s390_stdy (code, s390_f6, 0, STK_BASE, fpOffset+3*sizeof(gdouble));
2086         } else {
2087                 s390_std  (code, s390_f0, 0, baseReg, fpOffset);
2088                 s390_std  (code, s390_f2, 0, baseReg, fpOffset+sizeof(gdouble));
2089                 s390_std  (code, s390_f4, 0, baseReg, fpOffset+2*sizeof(gdouble));
2090                 s390_std  (code, s390_f6, 0, baseReg, fpOffset+3*sizeof(gdouble));
2091         }
2092         s390_basr (code, s390_r13, 0);
2093         s390_j    (code, 10);
2094         s390_llong(code, cfg->method);
2095         s390_llong(code, func);
2096         s390_lg   (code, s390_r2, 0, s390_r13, 4);
2097         if (has_ld)
2098                 s390_lay  (code, s390_r3, 0, STK_BASE, parmOffset);
2099         else
2100                 s390_la   (code, s390_r3, 0, baseReg, parmOffset);
2101         s390_lgr  (code, s390_r4, STK_BASE);
2102         s390_aghi (code, s390_r4, cfg->stack_usage);
2103         s390_lg   (code, s390_r1, 0, s390_r13, 12);
2104         s390_basr (code, s390_r14, s390_r1);
2105         if (has_ld) {
2106                 s390_ldy  (code, s390_f6, 0, STK_BASE, fpOffset+3*sizeof(gdouble));
2107                 s390_ldy  (code, s390_f4, 0, STK_BASE, fpOffset+2*sizeof(gdouble));
2108                 s390_ldy  (code, s390_f2, 0, STK_BASE, fpOffset+sizeof(gdouble));
2109                 s390_ldy  (code, s390_f0, 0, STK_BASE, fpOffset);
2110         } else {
2111                 s390_ld   (code, s390_f6, 0, baseReg, fpOffset+3*sizeof(gdouble));
2112                 s390_ld   (code, s390_f4, 0, baseReg, fpOffset+2*sizeof(gdouble));
2113                 s390_ld   (code, s390_f2, 0, baseReg, fpOffset+sizeof(gdouble));
2114                 s390_ld   (code, s390_f0, 0, baseReg, fpOffset);
2115         }
2116         s390_lmg  (code, s390_r2, s390_r6, STK_BASE, parmOffset);
2117
2118         return code;
2119 }
2120
2121 /*========================= End of Function ========================*/
2122
2123 /*------------------------------------------------------------------*/
2124 /*                                                                  */
2125 /* Name         - mono_arch_instrument_epilog                       */
2126 /*                                                                  */
2127 /* Function     - Create an epilog that will handle the returned    */
2128 /*                values used in instrumentation.                   */
2129 /*                                                                  */
2130 /*------------------------------------------------------------------*/
2131
2132 void*
2133 mono_arch_instrument_epilog (MonoCompile *cfg, void *func, void *p, gboolean enable_arguments)
2134 {
2135         guchar     *code = p;
2136         int        save_mode = SAVE_NONE,
2137                    saveOffset;
2138         MonoMethod *method = cfg->method;
2139         int        rtype = mono_type_get_underlying_type (mono_method_signature (method)->ret)->type;
2140
2141         saveOffset = cfg->stack_usage - S390_TRACE_STACK_SIZE;
2142         if (method->save_lmf)
2143                 saveOffset -= sizeof(MonoLMF);
2144
2145 handle_enum:
2146         switch (rtype) {
2147         case MONO_TYPE_VOID:
2148                 /* special case string .ctor icall */
2149                 if (strcmp (".ctor", method->name) && method->klass == mono_defaults.string_class)
2150                         save_mode = SAVE_ONE;
2151                 else
2152                         save_mode = SAVE_NONE;
2153                 break;
2154         case MONO_TYPE_I8:
2155         case MONO_TYPE_U8:
2156                 save_mode = SAVE_ONE;
2157                 break;
2158         case MONO_TYPE_R4:
2159                 save_mode = SAVE_R4;
2160                 break;
2161         case MONO_TYPE_R8:
2162                 save_mode = SAVE_R8;
2163                 break;
2164         case MONO_TYPE_VALUETYPE:
2165                 if (mono_method_signature (method)->ret->data.klass->enumtype) {
2166                         rtype = mono_method_signature (method)->ret->data.klass->enum_basetype->type;
2167                         goto handle_enum;
2168                 }
2169                 save_mode = SAVE_STRUCT;
2170                 break;
2171         default:
2172                 save_mode = SAVE_ONE;
2173                 break;
2174         }
2175
2176         switch (save_mode) {
2177         case SAVE_ONE:
2178                 s390_stg (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2179                 if (enable_arguments) {
2180                         s390_lgr (code, s390_r3, s390_r2);
2181                 }
2182                 break;
2183         case SAVE_R4:
2184                 s390_std (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2185                 if (enable_arguments) {
2186                         s390_ldebr (code, s390_f0, s390_f0);
2187                 }
2188                 break;
2189         case SAVE_R8:
2190                 s390_std (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2191                 break;
2192         case SAVE_STRUCT:
2193                 s390_stg (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2194                 if (enable_arguments) {
2195                         s390_lg (code, s390_r3, 0, cfg->frame_reg,
2196                                  S390_MINIMAL_STACK_SIZE+cfg->param_area);
2197                 }
2198                 break;
2199         case SAVE_NONE:
2200         default:
2201                 break;
2202         }
2203
2204         s390_basr (code, s390_r13, 0);
2205         s390_j    (code, 10);
2206         s390_llong(code, cfg->method);
2207         s390_llong(code, func);
2208         s390_lg   (code, s390_r2, 0, s390_r13, 4);
2209         s390_lg   (code, s390_r1, 0, s390_r13, 12);
2210         s390_basr (code, s390_r14, s390_r1);
2211
2212         switch (save_mode) {
2213         case SAVE_ONE:
2214                 s390_lg  (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2215                 break;
2216         case SAVE_R4:
2217         case SAVE_R8:
2218                 s390_ld  (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2219                 break;
2220         case SAVE_STRUCT:
2221                 s390_lg  (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2222                 break;
2223         case SAVE_NONE:
2224         default:
2225                 break;
2226         }
2227
2228         return code;
2229 }
2230
2231 /*========================= End of Function ========================*/
2232
2233 /*------------------------------------------------------------------*/
2234 /*                                                                  */
2235 /* Name         - peephole_pass                                     */
2236 /*                                                                  */
2237 /* Function     - Form a peephole pass at the code looking for      */
2238 /*                simple optimizations.                             */
2239 /*                                                                  */
2240 /*------------------------------------------------------------------*/
2241
2242 static void
2243 peephole_pass (MonoCompile *cfg, MonoBasicBlock *bb)
2244 {
2245         MonoInst *ins, *last_ins = NULL;
2246         ins = bb->code;
2247
2248         while (ins) {
2249
2250                 switch (ins->opcode) {
2251                 case OP_MUL_IMM:
2252                         /* remove unnecessary multiplication with 1 */
2253                         if (ins->inst_imm == 1) {
2254                                 if (ins->dreg != ins->sreg1) {
2255                                         ins->opcode = OP_MOVE;
2256                                 } else {
2257                                         last_ins->next = ins->next;
2258                                         ins = ins->next;
2259                                         continue;
2260                                 }
2261                         }
2262                         break;
2263                 case OP_LOAD_MEMBASE:
2264                 case OP_LOADI4_MEMBASE:
2265                         /*
2266                          * OP_STORE_MEMBASE_REG reg, offset(basereg)
2267                          * OP_LOAD_MEMBASE offset(basereg), reg
2268                          */
2269                         if (last_ins && (last_ins->opcode == OP_STOREI4_MEMBASE_REG
2270                                          || last_ins->opcode == OP_STORE_MEMBASE_REG) &&
2271                             ins->inst_basereg == last_ins->inst_destbasereg &&
2272                             ins->inst_offset == last_ins->inst_offset) {
2273                                 if (ins->dreg == last_ins->sreg1) {
2274                                         last_ins->next = ins->next;
2275                                         ins = ins->next;
2276                                         continue;
2277                                 } else {
2278                                         ins->opcode = OP_MOVE;
2279                                         ins->sreg1 = last_ins->sreg1;
2280                                 }
2281
2282                         /*
2283                          * Note: reg1 must be different from the basereg in the second load
2284                          * OP_LOAD_MEMBASE offset(basereg), reg1
2285                          * OP_LOAD_MEMBASE offset(basereg), reg2
2286                          * -->
2287                          * OP_LOAD_MEMBASE offset(basereg), reg1
2288                          * OP_MOVE reg1, reg2
2289                          */
2290                         } if (last_ins && (last_ins->opcode == OP_LOADI4_MEMBASE
2291                                            || last_ins->opcode == OP_LOAD_MEMBASE) &&
2292                               ins->inst_basereg != last_ins->dreg &&
2293                               ins->inst_basereg == last_ins->inst_basereg &&
2294                               ins->inst_offset == last_ins->inst_offset) {
2295
2296                                 if (ins->dreg == last_ins->dreg) {
2297                                         last_ins->next = ins->next;
2298                                         ins = ins->next;
2299                                         continue;
2300                                 } else {
2301                                         ins->opcode = OP_MOVE;
2302                                         ins->sreg1 = last_ins->dreg;
2303                                 }
2304
2305                         }
2306                         break;
2307                 case OP_LOADU1_MEMBASE:
2308                 case OP_LOADI1_MEMBASE:
2309                         if (last_ins && (last_ins->opcode == OP_STOREI1_MEMBASE_REG) &&
2310                                         ins->inst_basereg == last_ins->inst_destbasereg &&
2311                                         ins->inst_offset == last_ins->inst_offset) {
2312                                 if (ins->dreg == last_ins->sreg1) {
2313                                         last_ins->next = ins->next;
2314                                         ins = ins->next;
2315                                         continue;
2316                                 } else {
2317                                         ins->opcode = OP_MOVE;
2318                                         ins->sreg1 = last_ins->sreg1;
2319                                 }
2320                         }
2321                         break;
2322                 case OP_LOADU2_MEMBASE:
2323                 case OP_LOADI2_MEMBASE:
2324                         if (last_ins && (last_ins->opcode == OP_STOREI2_MEMBASE_REG) &&
2325                                         ins->inst_basereg == last_ins->inst_destbasereg &&
2326                                         ins->inst_offset == last_ins->inst_offset) {
2327                                 if (ins->dreg == last_ins->sreg1) {
2328                                         last_ins->next = ins->next;
2329                                         ins = ins->next;
2330                                         continue;
2331                                 } else {
2332                                         ins->opcode = OP_MOVE;
2333                                         ins->sreg1 = last_ins->sreg1;
2334                                 }
2335                         }
2336                         break;
2337                 case CEE_CONV_I4:
2338                 case CEE_CONV_U4:
2339                 case OP_MOVE:
2340                         /*
2341                          * OP_MOVE reg, reg
2342                          */
2343                         if (ins->dreg == ins->sreg1) {
2344                                 if (last_ins)
2345                                         last_ins->next = ins->next;
2346                                 ins = ins->next;
2347                                 continue;
2348                         }
2349                         /*
2350                          * OP_MOVE sreg, dreg
2351                          * OP_MOVE dreg, sreg
2352                          */
2353                         if (last_ins && last_ins->opcode == OP_MOVE &&
2354                             ins->sreg1 == last_ins->dreg &&
2355                             ins->dreg == last_ins->sreg1) {
2356                                 last_ins->next = ins->next;
2357                                 ins = ins->next;
2358                                 continue;
2359                         }
2360                         break;
2361                 }
2362                 last_ins = ins;
2363                 ins = ins->next;
2364         }
2365         bb->last_ins = last_ins;
2366 }
2367
2368 /*========================= End of Function ========================*/
2369
2370 /*------------------------------------------------------------------*/
2371 /*                                                                  */
2372 /* Name         - mono_arch_local_regalloc.                         */
2373 /*                                                                  */
2374 /* Function     - We first scan the list of instructions and we     */
2375 /*                save the liveness information of each register    */
2376 /*                (when the register is first used, when its value  */
2377 /*                is set etc.). We also reverse the list of instr-  */
2378 /*                uctions (in the InstList list) because assigning  */
2379 /*                registers backwards allows for more tricks to be  */
2380 /*                used.                                             */
2381 /*                                                                  */
2382 /*------------------------------------------------------------------*/
2383
2384 void
2385 mono_arch_local_regalloc (MonoCompile *cfg, MonoBasicBlock *bb)
2386 {
2387         mono_local_regalloc(cfg, bb);
2388 }
2389
2390 /*========================= End of Function ========================*/
2391
2392 /*------------------------------------------------------------------*/
2393 /*                                                                  */
2394 /* Name         - emit_float_to_int                                 */
2395 /*                                                                  */
2396 /* Function     - Create instructions which will convert a floating */
2397 /*                point value to integer.                           */
2398 /*                                                                  */
2399 /*------------------------------------------------------------------*/
2400
2401 static guchar*
2402 emit_float_to_int (MonoCompile *cfg, guchar *code, int dreg, int sreg, int size, gboolean is_signed)
2403 {
2404         /* sreg is a float, dreg is an integer reg. */
2405         if (is_signed) {
2406                 s390_cfdbr (code, dreg, 5, sreg);
2407                 switch (size) {
2408                         case 1:
2409                                 s390_lghi (code, s390_r0, 0);
2410                                 s390_lghi (code, s390_r13, 0xff);
2411                                 s390_ltgr (code, dreg, dreg);
2412                                 s390_jnl  (code, 4);
2413                                 s390_lghi (code, s390_r0, 0x80);
2414                                 s390_ngr  (code, dreg, s390_r13);
2415                                 s390_ogr  (code, dreg, s390_r0);
2416                                 break;
2417                 }
2418         } else {
2419                 short *o[1];
2420                 s390_basr   (code, s390_r13, 0);
2421                 s390_j      (code, 10);
2422                 s390_llong  (code, 0x41e0000000000000);
2423                 s390_llong  (code, 0x41f0000000000000);
2424                 s390_ldr    (code, s390_f15, sreg);
2425                 s390_cdb    (code, s390_f15, 0, s390_r13, 4);
2426                 s390_jl     (code, 0); CODEPTR (code, o[0]);
2427                 s390_sdb    (code, s390_f15, 0, s390_r13, 12);
2428                 s390_cfdbr  (code, dreg, 7, s390_f15);
2429                 s390_j      (code, 4);
2430                 PTRSLOT (code, o[0]);
2431                 s390_cfdbr  (code, dreg, 5, sreg);
2432                 switch (size) {
2433                         case 1:
2434                                 s390_lghi (code, s390_r0, 0xff);
2435                                 s390_ngr  (code, dreg, s390_r0);
2436                                 break;
2437                         case 2:
2438                                 s390_lghi (code, s390_r0, -1);
2439                                 s390_srlg (code, s390_r0, s390_r0, 0, 16);
2440                                 s390_ngr  (code, dreg, s390_r0);
2441                                 break;
2442                 }
2443         }
2444         return code;
2445 }
2446
2447 /*========================= End of Function ========================*/
2448
2449 /*------------------------------------------------------------------*/
2450 /*                                                                  */
2451 /* Name         - mono_arch_output_basic_block                      */
2452 /*                                                                  */
2453 /* Function     - Perform the "real" work of emitting instructions  */
2454 /*                that will do the work of in the basic block.      */
2455 /*                                                                  */
2456 /*------------------------------------------------------------------*/
2457
2458 void
2459 mono_arch_output_basic_block (MonoCompile *cfg, MonoBasicBlock *bb)
2460 {
2461         MonoInst *ins;
2462         MonoCallInst *call;
2463         guint offset;
2464         guint8 *code = cfg->native_code + cfg->code_len;
2465         MonoInst *last_ins = NULL;
2466         guint last_offset = 0;
2467         int max_len, cpos, src2;
2468
2469         if (cfg->opt & MONO_OPT_PEEPHOLE)
2470                 peephole_pass (cfg, bb);
2471
2472         /* we don't align basic blocks of loops on s390 */
2473
2474         if (cfg->verbose_level > 2)
2475                 g_print ("Basic block %d starting at offset 0x%x\n", bb->block_num, bb->native_offset);
2476
2477         cpos = bb->max_offset;
2478
2479         if (cfg->prof_options & MONO_PROFILE_COVERAGE) {
2480                 //MonoCoverageInfo *cov = mono_get_coverage_info (cfg->method);
2481                 //g_assert (!mono_compile_aot);
2482                 //cpos += 6;
2483                 //if (bb->cil_code)
2484                 //      cov->data [bb->dfn].iloffset = bb->cil_code - cfg->cil_code;
2485                 /* this is not thread save, but good enough */
2486                 /* fixme: howto handle overflows? */
2487                 //x86_inc_mem (code, &cov->data [bb->dfn].count);
2488         }
2489
2490         ins = bb->code;
2491         while (ins) {
2492                 offset = code - cfg->native_code;
2493
2494                 max_len = ((guint8 *)ins_spec [ins->opcode])[MONO_INST_LEN];
2495
2496                 if (offset > (cfg->code_size - max_len - 16)) {
2497                         cfg->code_size *= 2;
2498                         cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
2499                         code = cfg->native_code + offset;
2500                 }
2501
2502                 mono_debug_record_line_number (cfg, ins, offset);
2503
2504                 switch (ins->opcode) {
2505                 case OP_STOREI1_MEMBASE_IMM: {
2506                         s390_lghi (code, s390_r0, ins->inst_imm);
2507                         S390_LONG (code, stcy, stc, s390_r0, 0,
2508                                    ins->inst_destbasereg, ins->inst_offset);
2509                 }
2510                         break;
2511                 case OP_STOREI2_MEMBASE_IMM: {
2512                         s390_lghi (code, s390_r0, ins->inst_imm);
2513                         S390_LONG (code, sthy, sth, s390_r0, 0,
2514                                    ins->inst_destbasereg, ins->inst_offset);
2515                 }
2516                         break;
2517                 case OP_STOREI4_MEMBASE_IMM: {
2518                         if (s390_is_imm16(ins->inst_imm)) {
2519                                 s390_lghi (code, s390_r0, ins->inst_imm);
2520                         } else {
2521                                 s390_basr (code, s390_r13, 0);
2522                                 s390_j    (code, 6);
2523                                 s390_llong(code, ins->inst_imm);
2524                                 s390_lg   (code, s390_r0, 0, s390_r13, 4);
2525                         }
2526                         S390_LONG (code, sty, st, s390_r0, 0,
2527                                    ins->inst_destbasereg, ins->inst_offset);
2528                 }
2529                         break;
2530                 case OP_STORE_MEMBASE_IMM:
2531                 case OP_STOREI8_MEMBASE_IMM: {
2532                         if (s390_is_imm16(ins->inst_imm)) {
2533                                 s390_lghi (code, s390_r0, ins->inst_imm);
2534                         } else {
2535                                 s390_basr (code, s390_r13, 0);
2536                                 s390_j    (code, 6);
2537                                 s390_llong(code, ins->inst_imm);
2538                                 s390_lg   (code, s390_r0, 0, s390_r13, 4);
2539                         }
2540                         S390_LONG (code, stg, stg, s390_r0, 0,
2541                                    ins->inst_destbasereg, ins->inst_offset);
2542                 }
2543                         break;
2544                 case OP_STOREI1_MEMBASE_REG: {
2545                         S390_LONG (code, stcy, stc, ins->sreg1, 0,
2546                                    ins->inst_destbasereg, ins->inst_offset);
2547                 }
2548                         break;
2549                 case OP_STOREI2_MEMBASE_REG: {
2550                         S390_LONG (code, sthy, sth, ins->sreg1, 0,
2551                                    ins->inst_destbasereg, ins->inst_offset);
2552                 }
2553                         break;
2554                 case OP_STOREI4_MEMBASE_REG: {
2555                         S390_LONG (code, sty, st, ins->sreg1, 0,
2556                                    ins->inst_destbasereg, ins->inst_offset);
2557                 }
2558                         break;
2559                 case OP_STORE_MEMBASE_REG:
2560                 case OP_STOREI8_MEMBASE_REG: {
2561                         S390_LONG (code, stg, stg, ins->sreg1, 0,
2562                                    ins->inst_destbasereg, ins->inst_offset);
2563                 }
2564                         break;
2565                 case CEE_LDIND_I:
2566                 case CEE_LDIND_I4: {
2567                         s390_basr (code, s390_r13, 0);
2568                         s390_j    (code, 6);
2569                         s390_llong(code, ins->inst_p0);
2570                         s390_lg   (code, s390_r13, 0, s390_r13, 4);
2571                         s390_lgf  (code, ins->dreg, 0, s390_r13, 0);
2572                 }
2573                         break;
2574                 case CEE_LDIND_U4: {
2575                         s390_basr (code, s390_r13, 0);
2576                         s390_j    (code, 6);
2577                         s390_llong(code, ins->inst_p0);
2578                         s390_lg   (code, s390_r13, 0, s390_r13, 4);
2579                         s390_llgf (code, ins->dreg, 0, s390_r13, 0);
2580                 }
2581                         break;
2582                 case OP_LOADU4_MEM:
2583                         g_assert_not_reached ();
2584                         break;
2585                 case OP_LOAD_MEMBASE:
2586                 case OP_LOADI8_MEMBASE: {
2587                         S390_LONG (code, lg, lg, ins->dreg, 0,
2588                                    ins->inst_basereg, ins->inst_offset);
2589                 }
2590                         break;
2591                 case OP_LOADI4_MEMBASE: {
2592                         S390_LONG (code, lgf, lgf, ins->dreg, 0,
2593                                    ins->inst_basereg, ins->inst_offset);
2594                 }
2595                         break;
2596                 case OP_LOADU4_MEMBASE: {
2597                         S390_LONG (code, llgf, llgf, ins->dreg, 0,
2598                                    ins->inst_basereg, ins->inst_offset);
2599                 }
2600                         break;
2601                 case OP_LOADU1_MEMBASE: {
2602                         S390_LONG (code, llgc, llgc, ins->dreg, 0,
2603                                    ins->inst_basereg, ins->inst_offset);
2604                 }
2605                         break;
2606                 case OP_LOADI1_MEMBASE: {
2607                         S390_LONG (code, lb, lb, ins->dreg, 0,
2608                                    ins->inst_basereg, ins->inst_offset);
2609                 }
2610                         break;
2611                 case OP_LOADU2_MEMBASE: {
2612                         S390_LONG (code, llgh, llgh, ins->dreg, 0,
2613                                    ins->inst_basereg, ins->inst_offset);
2614                 }
2615                         break;
2616                 case OP_LOADI2_MEMBASE: {
2617                         S390_LONG (code, lgh, lgh, ins->dreg, 0,
2618                                    ins->inst_basereg, ins->inst_offset);
2619                 }
2620                         break;
2621                 case CEE_CONV_I1: {
2622                         s390_lghi  (code, s390_r0, 0x80);
2623                         if (ins->dreg != ins->sreg1) {
2624                                 s390_lgr  (code, ins->dreg, ins->sreg1);
2625                         }
2626                         s390_ngr  (code, s390_r0, ins->sreg1);
2627                         s390_jz   (code, 9);
2628                         s390_lghi (code, s390_r13, -1);
2629                         s390_sllg (code, s390_r13, s390_r13, 0, 8);
2630                         s390_ogr  (code, ins->dreg, s390_r13);
2631                 }
2632                         break;
2633                 case CEE_CONV_I2: {
2634                         s390_lghi (code, s390_r0, 0x80);
2635                         s390_sllg (code, s390_r0, s390_r0, 0, 8);
2636                         if (ins->dreg != ins->sreg1) {
2637                                 s390_lgr  (code, ins->dreg, ins->sreg1);
2638                         }
2639                         s390_ngr  (code, s390_r0, ins->sreg1);
2640                         s390_jz   (code, 9);
2641                         s390_lghi (code, s390_r13, -1);
2642                         s390_sllg (code, s390_r13, s390_r13, 0, 16);
2643                         s390_ogr  (code, ins->dreg, s390_r13);
2644                 }
2645                         break;
2646                 case CEE_CONV_U1: {
2647                         s390_lghi (code, s390_r0, 0xff);
2648                         if (ins->dreg != ins->sreg1) {
2649                                 s390_lgr  (code, ins->dreg, ins->sreg1);
2650                         }
2651                         s390_ngr  (code, ins->dreg, s390_r0);
2652                 }
2653                         break;
2654                 case CEE_CONV_U2: {
2655                         s390_lghi (code, s390_r0, -1);
2656                         s390_sllg (code, s390_r0, s390_r0, 0, 16);
2657                         s390_srlg (code, s390_r0, s390_r0, 0, 16);
2658                         if (ins->dreg != ins->sreg1) {
2659                                 s390_lgr  (code, ins->dreg, ins->sreg1);
2660                         }
2661                         s390_ngr  (code, ins->dreg, s390_r0);
2662                 }
2663                         break;
2664                 case OP_COMPARE:
2665                 case OP_LCOMPARE: {
2666                         if ((ins->next) &&
2667                             (opcode_to_cond(ins->next->opcode) >= CMP_LE_UN))
2668                                 s390_clgr (code, ins->sreg1, ins->sreg2);
2669                         else
2670                                 s390_cgr  (code, ins->sreg1, ins->sreg2);
2671                 }
2672                         break;
2673                 case OP_COMPARE_IMM: {
2674                         if (s390_is_imm16 (ins->inst_imm)) {
2675                                 s390_lghi (code, s390_r0, ins->inst_imm);
2676                                 if ((ins->next) &&
2677                                     (opcode_to_cond(ins->next->opcode) >= CMP_LE_UN))
2678                                         s390_clgr (code, ins->sreg1, s390_r0);
2679                                 else
2680                                         s390_cgr  (code, ins->sreg1, s390_r0);
2681                         }
2682                         else {
2683                                 s390_basr (code, s390_r13, 0);
2684                                 s390_j    (code, 6);
2685                                 s390_llong(code, ins->inst_imm);
2686                                 if ((ins->next) &&
2687                                     (opcode_to_cond(ins->next->opcode) >= CMP_LE_UN))
2688                                         s390_clg  (code, ins->sreg1, 0, s390_r13, 4);
2689                                 else
2690                                         s390_cg   (code, ins->sreg1, 0, s390_r13, 4);
2691                         }
2692                 }
2693                         break;
2694                 case OP_ICOMPARE: {
2695                         if ((ins->next) &&
2696                             (opcode_to_cond(ins->next->opcode) >= CMP_LE_UN))
2697                                 s390_clr  (code, ins->sreg1, ins->sreg2);
2698                         else
2699                                 s390_cr   (code, ins->sreg1, ins->sreg2);
2700                 }
2701                         break;
2702                 case OP_ICOMPARE_IMM: {
2703                         if (s390_is_imm16 (ins->inst_imm)) {
2704                                 s390_lghi (code, s390_r0, ins->inst_imm);
2705                                 if ((ins->next) &&
2706                                     (opcode_to_cond(ins->next->opcode) >= CMP_LE_UN))
2707                                         s390_clr  (code, ins->sreg1, s390_r0);
2708                                 else
2709                                         s390_cr   (code, ins->sreg1, s390_r0);
2710                         }
2711                         else {
2712                                 s390_basr (code, s390_r13, 0);
2713                                 s390_j    (code, 4);
2714                                 s390_word (code, ins->inst_imm);
2715                                 if ((ins->next) &&
2716                                     (opcode_to_cond(ins->next->opcode) >= CMP_LE_UN))
2717                                         s390_cl  (code, ins->sreg1, 0, s390_r13, 4);
2718                                 else
2719                                         s390_c   (code, ins->sreg1, 0, s390_r13, 4);
2720                         }
2721                 }
2722                         break;
2723                 case CEE_BREAK: {
2724                         s390_basr  (code, s390_r13, 0);
2725                         s390_j     (code, 6);
2726                         mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS,
2727                                              mono_arch_break);
2728                         s390_llong (code, mono_arch_break);
2729                         s390_lg    (code, s390_r14, 0, s390_r13, 4);
2730                         s390_basr  (code, s390_r14, s390_r14);
2731                 }
2732                         break;
2733                 case OP_ADDCC: {
2734                         CHECK_SRCDST_COM;
2735                         s390_algr  (code, ins->dreg, src2);
2736                 }
2737                         break;
2738                 case CEE_ADD: {
2739                         CHECK_SRCDST_COM;
2740                         s390_agr   (code, ins->dreg, src2);
2741                 }
2742                         break;
2743                 case OP_ADC: {
2744                         CHECK_SRCDST_COM;
2745                         s390_alcgr (code, ins->dreg, src2);
2746                 }
2747                         break;
2748                 case OP_ADD_IMM: {
2749                         if (ins->dreg != ins->sreg1) {
2750                                 s390_lgr  (code, ins->dreg, ins->sreg1);
2751                         }
2752                         if (s390_is_imm16 (ins->inst_imm)) {
2753                                 s390_aghi (code, ins->dreg, ins->inst_imm);
2754                         } else {
2755                                 s390_basr (code, s390_r13, 0);
2756                                 s390_j    (code, 6);
2757                                 s390_llong(code, ins->inst_imm);
2758                                 s390_ag   (code, ins->dreg, 0, s390_r13, 4);
2759                         }
2760                 }
2761                         break;
2762 //              case OP_ADDCC_IMM: {
2763 //                      if ((ins->next) &&
2764 //                          (ins->next->opcode == OP_ADC_IMM)) {
2765 //                              s390_basr (code, s390_r13, 0);
2766 //                              s390_j    (code, 6);
2767 //                              s390_llong(code, ins->inst_imm);
2768 //                              if (ins->dreg != ins->sreg1) {
2769 //                                      s390_lgr  (code, ins->dreg, ins->sreg1);
2770 //                              }
2771 //                              s390_alg  (code, ins->dreg, 0, s390_r13, 4);
2772 //                      } else {
2773 //                              if (s390_is_imm16 (ins->inst_imm)) {
2774 //                                      if (ins->dreg != ins->sreg1) {
2775 //                                              s390_lgr  (code, ins->dreg, ins->sreg1);
2776 //                                      }
2777 //                                      s390_aghi (code, ins->dreg, ins->inst_imm);
2778 //                              } else {
2779 //                                      s390_basr (code, s390_r13, 0);
2780 //                                      s390_j    (code, 6);
2781 //                                      s390_llong(code, ins->inst_imm);
2782 //                                      if (ins->dreg != ins->sreg1) {
2783 //                                              s390_lgr  (code, ins->dreg, ins->sreg1);
2784 //                                      }
2785 //                                      s390_ag   (code, ins->dreg, 0, s390_r13, 4);
2786 //                              }
2787 //                      }
2788 //              }
2789 //                      break;
2790                 case OP_ADC_IMM: {
2791                         if (ins->dreg != ins->sreg1) {
2792                                 s390_lgr  (code, ins->dreg, ins->sreg1);
2793                         }
2794                         if (s390_is_imm16 (ins->inst_imm)) {
2795                                 s390_lghi  (code, s390_r0, ins->inst_imm);
2796                                 s390_alcgr (code, ins->dreg, s390_r0);
2797                         } else {
2798                                 s390_basr  (code, s390_r13, 0);
2799                                 s390_j     (code, 6);
2800                                 s390_llong (code, ins->inst_imm);
2801                                 s390_lg    (code, s390_r13, 0, s390_r13, 4);
2802                                 s390_alcgr (code, ins->dreg, s390_r13);
2803                         }
2804                 }
2805                         break;
2806                 case OP_LADD_OVF: {
2807                         CHECK_SRCDST_COM;
2808                         s390_agr   (code, ins->dreg, src2);
2809                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2810                 }
2811                         break;
2812                 case OP_LADD_OVF_UN: {
2813                         CHECK_SRCDST_COM;
2814                         s390_algr  (code, ins->dreg, src2);
2815                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
2816                 }
2817                         break;
2818                 case OP_ADD_OVF_CARRY: {
2819                         CHECK_SRCDST_COM;
2820                         s390_lghi  (code, s390_r0, 0);
2821                         s390_lgr   (code, s390_r1, s390_r0);
2822                         s390_alcgr (code, s390_r0, s390_r1);
2823                         s390_agr   (code, ins->dreg, src2);
2824                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2825                         s390_agr   (code, ins->dreg, s390_r0);
2826                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2827                 }
2828                         break;
2829                 case OP_ADD_OVF_UN_CARRY: {
2830                         CHECK_SRCDST_COM;
2831                         s390_alcgr (code, ins->dreg, src2);
2832                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
2833                 }
2834                         break;
2835                 case OP_SUBCC: {
2836                         CHECK_SRCDST_NCOM;
2837                         s390_slgr (code, ins->dreg, src2);
2838                 }
2839                         break;
2840                 case CEE_SUB: {
2841                         CHECK_SRCDST_NCOM;
2842                         s390_sgr  (code, ins->dreg, src2);
2843                 }
2844                         break;
2845                 case OP_SBB: {
2846                         CHECK_SRCDST_NCOM;
2847                         s390_slbgr(code, ins->dreg, src2);
2848                 }
2849                         break;
2850                 case OP_SUB_IMM: {
2851                         if (ins->dreg != ins->sreg1) {
2852                                 s390_lgr   (code, ins->dreg, ins->sreg1);
2853                         }
2854                         if (s390_is_imm16 (-ins->inst_imm)) {
2855                                 s390_lghi  (code, s390_r0, ins->inst_imm);
2856                                 s390_slgr  (code, ins->dreg, s390_r0);
2857                         } else {
2858                                 s390_basr (code, s390_r13, 0);
2859                                 s390_j    (code, 6);
2860                                 s390_llong(code, ins->inst_imm);
2861                                 s390_slg  (code, ins->dreg, 0, s390_r13, 4);
2862                         }
2863                 }
2864                         break;
2865                 case OP_SBB_IMM: {
2866                         if (ins->dreg != ins->sreg1) {
2867                                 s390_lgr   (code, ins->dreg, ins->sreg1);
2868                         }
2869                         if (s390_is_imm16 (-ins->inst_imm)) {
2870                                 s390_lghi  (code, s390_r0, ins->inst_imm);
2871                                 s390_slbgr (code, ins->dreg, s390_r0);
2872                         } else {
2873                                 s390_basr (code, s390_r13, 0);
2874                                 s390_j    (code, 6);
2875                                 s390_llong(code, ins->inst_imm);
2876                                 s390_slbg (code, ins->dreg, 0, s390_r13, 4);
2877                         }
2878                 }
2879                         break;
2880                 case OP_LSUB_OVF: {
2881                         CHECK_SRCDST_NCOM;
2882                         s390_sgr  (code, ins->dreg, src2);
2883                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2884                 }
2885                         break;
2886                 case OP_LSUB_OVF_UN: {
2887                         CHECK_SRCDST_NCOM;
2888                         s390_slgr (code, ins->dreg, src2);
2889                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
2890                 }
2891                         break;
2892                 case OP_SUB_OVF_CARRY: {
2893                         CHECK_SRCDST_NCOM;
2894                         s390_lghi  (code, s390_r0, 0);
2895                         s390_lgr   (code, s390_r1, s390_r0);
2896                         s390_slbgr (code, s390_r0, s390_r1);
2897                         s390_sgr   (code, ins->dreg, src2);
2898                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2899                         s390_agr   (code, ins->dreg, s390_r0);
2900                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2901                 }
2902                         break;
2903                 case OP_SUB_OVF_UN_CARRY: {
2904                         CHECK_SRCDST_NCOM;
2905                         s390_slbgr (code, ins->dreg, src2);
2906                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
2907                 }
2908                         break;
2909                 case CEE_AND: {
2910                         if (ins->sreg1 == ins->dreg) {
2911                                 s390_ngr  (code, ins->dreg, ins->sreg2);
2912                         }
2913                         else {
2914                                 if (ins->sreg2 == ins->dreg) {
2915                                         s390_ngr (code, ins->dreg, ins->sreg1);
2916                                 }
2917                                 else {
2918                                         s390_lgr (code, ins->dreg, ins->sreg1);
2919                                         s390_ngr (code, ins->dreg, ins->sreg2);
2920                                 }
2921                         }
2922                 }
2923                         break;
2924                 case OP_AND_IMM: {
2925                         if (ins->dreg != ins->sreg1) {
2926                                 s390_lgr  (code, ins->dreg, ins->sreg1);
2927                         }
2928                         if (s390_is_imm16 (ins->inst_imm)) {
2929                                 s390_lghi  (code, s390_r0, ins->inst_imm);
2930                                 s390_ngr  (code, ins->dreg, s390_r0);
2931                         } else {
2932                                 s390_basr (code, s390_r13, 0);
2933                                 s390_j    (code, 6);
2934                                 s390_llong(code, ins->inst_imm);
2935                                 s390_ng   (code, ins->dreg, 0, s390_r13, 4);
2936                         }
2937                 }
2938                         break;
2939                 case OP_LDIV: {
2940                         s390_lgr  (code, s390_r1, ins->sreg1);
2941                         s390_dsgr (code, s390_r0, ins->sreg2);
2942                         s390_lgr  (code, ins->dreg, s390_r1);
2943                 }
2944                         break;
2945                 case OP_LDIV_UN: {
2946                         s390_lgr   (code, s390_r1, ins->sreg1);
2947                         s390_lghi  (code, s390_r0, 0);
2948                         s390_dlgr  (code, s390_r0, ins->sreg2);
2949                         s390_lgr   (code, ins->dreg, s390_r1);
2950                 }
2951                         break;
2952                 case OP_DIV_IMM: {
2953                         if (s390_is_imm16 (ins->inst_imm)) {
2954                                 s390_lghi (code, s390_r13, ins->inst_imm);
2955                                 s390_lgr  (code, s390_r1, ins->sreg1);
2956                         } else {
2957                                 s390_basr (code, s390_r13, 0);
2958                                 s390_j    (code, 6);
2959                                 s390_llong(code, ins->inst_imm);
2960                                 s390_lgr  (code, s390_r1, ins->sreg1);
2961                                 s390_lg   (code, s390_r13, 0, s390_r13, 4);
2962                         }
2963                         s390_dsgr (code, s390_r0, s390_r13);
2964                         s390_lgr  (code, ins->dreg, s390_r1);
2965                 }
2966                         break;
2967                 case OP_LREM: {
2968                         s390_lgr  (code, s390_r1, ins->sreg1);
2969                         s390_dsgr (code, s390_r0, ins->sreg2);
2970                         s390_lgr  (code, ins->dreg, s390_r0);
2971                         break;
2972                 }
2973                 case OP_LREM_UN: {
2974                         s390_lgr   (code, s390_r1, ins->sreg1);
2975                         s390_lghi  (code, s390_r0, 0);
2976                         s390_dlgr  (code, s390_r0, ins->sreg2);
2977                         s390_lgr   (code, ins->dreg, s390_r0);
2978                 }
2979                         break;
2980                 case OP_REM_IMM: {
2981                         if (s390_is_imm16 (ins->inst_imm)) {
2982                                 s390_lghi  (code, s390_r13, ins->inst_imm);
2983                                 s390_lgr   (code, s390_r0, ins->sreg1);
2984                         } else {
2985                                 s390_basr (code, s390_r13, 0);
2986                                 s390_j    (code, 6);
2987                                 s390_llong(code, ins->inst_imm);
2988                                 s390_lgr  (code, s390_r0, ins->sreg1);
2989                                 s390_lg   (code, s390_r13, 0, s390_r13, 4);
2990                         }
2991                         s390_dsgr(code, s390_r0, s390_r13);
2992                         s390_lgr (code, ins->dreg, s390_r0);
2993                 }
2994                         break;
2995                 case CEE_OR: {
2996                         if (ins->sreg1 == ins->dreg) {
2997                                 s390_ogr  (code, ins->dreg, ins->sreg2);
2998                         }
2999                         else {
3000                                 if (ins->sreg2 == ins->dreg) {
3001                                         s390_ogr (code, ins->dreg, ins->sreg1);
3002                                 }
3003                                 else {
3004                                         s390_lgr (code, ins->dreg, ins->sreg1);
3005                                         s390_ogr (code, ins->dreg, ins->sreg2);
3006                                 }
3007                         }
3008                 }
3009                         break;
3010                 case OP_OR_IMM: {
3011                         if (ins->dreg != ins->sreg1) {
3012                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3013                         }
3014                         if (s390_is_imm16 (ins->inst_imm)) {
3015                                 s390_lghi (code, s390_r0, ins->inst_imm);
3016                                 s390_ogr  (code, ins->dreg, s390_r0);
3017                         } else {
3018                                 s390_basr (code, s390_r13, 0);
3019                                 s390_j    (code, 6);
3020                                 s390_llong(code, ins->inst_imm);
3021                                 s390_og   (code, ins->dreg, 0, s390_r13, 4);
3022                         }
3023                 }
3024                         break;
3025                 case CEE_XOR: {
3026                         if (ins->sreg1 == ins->dreg) {
3027                                 s390_xgr  (code, ins->dreg, ins->sreg2);
3028                         }
3029                         else {
3030                                 if (ins->sreg2 == ins->dreg) {
3031                                         s390_xgr (code, ins->dreg, ins->sreg1);
3032                                 }
3033                                 else {
3034                                         s390_lgr (code, ins->dreg, ins->sreg1);
3035                                         s390_xgr (code, ins->dreg, ins->sreg2);
3036                                 }
3037                         }
3038                 }
3039                         break;
3040                 case OP_XOR_IMM: {
3041                         if (ins->dreg != ins->sreg1) {
3042                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3043                         }
3044                         if (s390_is_imm16 (ins->inst_imm)) {
3045                                 s390_lghi  (code, s390_r0, ins->inst_imm);
3046                                 s390_xgr  (code, ins->dreg, s390_r0);
3047                         } else {
3048                                 s390_basr (code, s390_r13, 0);
3049                                 s390_j    (code, 6);
3050                                 s390_llong(code, ins->inst_imm);
3051                                 s390_xg   (code, ins->dreg, 0, s390_r13, 4);
3052                         }
3053                 }
3054                         break;
3055                 case CEE_SHL:
3056                 case OP_LSHL: {
3057                         CHECK_SRCDST_NCOM;
3058                         s390_sllg (code, ins->dreg, ins->dreg, src2, 0);
3059                 }
3060                         break;
3061                 case OP_SHL_IMM:
3062                 case OP_LSHL_IMM: {
3063                         if (ins->sreg1 != ins->dreg) {
3064                                 s390_lgr   (code, ins->dreg, ins->sreg1);
3065                         }
3066                         s390_sllg (code, ins->dreg, ins->dreg, 0, (ins->inst_imm & 0x3f));
3067                 }
3068                         break;
3069                 case CEE_SHR:
3070                 case OP_LSHR: {
3071                         CHECK_SRCDST_NCOM;
3072                         s390_srag  (code, ins->dreg, ins->dreg, src2, 0);
3073                 }
3074                         break;
3075                 case OP_SHR_IMM:
3076                 case OP_LSHR_IMM: {
3077                         if (ins->sreg1 != ins->dreg) {
3078                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3079                         }
3080                         s390_srag  (code, ins->dreg, ins->dreg, 0, (ins->inst_imm & 0x3f));
3081                 }
3082                         break;
3083                 case OP_SHR_UN_IMM:
3084                 case OP_LSHR_UN_IMM: {
3085                         if (ins->sreg1 != ins->dreg) {
3086                                 s390_lgr   (code, ins->dreg, ins->sreg1);
3087                         }
3088                         s390_srlg (code, ins->dreg, ins->dreg, 0, (ins->inst_imm & 0x3f));
3089                 }
3090                         break;
3091                 case CEE_SHR_UN:
3092                 case OP_LSHR_UN: {
3093                         CHECK_SRCDST_NCOM;
3094                         s390_srlg (code, ins->dreg, ins->dreg, src2, 0);
3095                 }
3096                         break;
3097                 case CEE_NOT: {
3098                         if (ins->sreg1 != ins->dreg) {
3099                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3100                         }
3101                         s390_lghi (code, s390_r0, -1);
3102                         s390_xgr  (code, ins->dreg, s390_r0);
3103                 }
3104                         break;
3105                 case CEE_NEG: {
3106                         s390_lcgr (code, ins->dreg, ins->sreg1);
3107                 }
3108                         break;
3109                 case CEE_MUL:
3110                 case OP_LMUL: {
3111                         CHECK_SRCDST_COM;
3112                         s390_msgr (code, ins->dreg, src2);
3113                 }
3114                         break;
3115                 case OP_MUL_IMM:
3116                 case OP_LMUL_IMM: {
3117                         if (ins->dreg != ins->sreg1) {
3118                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3119                         }
3120                         if (s390_is_imm16 (ins->inst_imm)) {
3121                                 s390_lghi (code, s390_r13, ins->inst_imm);
3122                         } else {
3123                                 s390_basr (code, s390_r13, 0);
3124                                 s390_j    (code, 6);
3125                                 s390_llong(code, ins->inst_imm);
3126                                 s390_lg   (code, s390_r13, 0, s390_r13, 4);
3127                         }
3128                         s390_msgr (code, ins->dreg, s390_r13);
3129                 }
3130                         break;
3131                 case OP_LMUL_OVF:
3132                 case CEE_MUL_OVF: {
3133                         short int *o[2];
3134                         s390_ltgr (code, s390_r1, ins->sreg1);
3135                         s390_jz   (code, 0); CODEPTR(code, o[0]);
3136                         s390_ltgr (code, s390_r0, ins->sreg2);
3137                         s390_jnz  (code, 6);
3138                         s390_lghi (code, s390_r1, 0);
3139                         s390_j    (code, 0); CODEPTR(code, o[1]);
3140                         s390_xgr  (code, s390_r0, s390_r1);
3141                         s390_msgr (code, s390_r1, ins->sreg2);
3142                         s390_xgr  (code, s390_r0, s390_r1);
3143                         s390_srlg (code, s390_r0, s390_r0, 0, 63);
3144                         s390_ltgr (code, s390_r0, s390_r0);
3145                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3146                         PTRSLOT   (code, o[0]);
3147                         PTRSLOT   (code, o[1]);
3148                         s390_lgr  (code, ins->dreg, s390_r1);
3149                 }
3150                         break;
3151                 case OP_LMUL_OVF_UN:
3152                 case CEE_MUL_OVF_UN: {
3153                         s390_lghi  (code, s390_r0, 0);
3154                         s390_lgr   (code, s390_r1, ins->sreg1);
3155                         s390_mlgr  (code, s390_r0, ins->sreg2);
3156                         s390_ltgr  (code, s390_r0, s390_r0);
3157                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3158                         s390_lgr   (code, ins->dreg, s390_r1);
3159                 }
3160                         break;
3161                 case OP_IADDCC: {
3162                         g_assert_not_reached ();
3163                         CHECK_SRCDST_COM_I;
3164                         s390_algr (code, ins->dreg, src2);
3165                 }
3166                         break;
3167                 case OP_IADD: {
3168                         CHECK_SRCDST_COM_I;
3169                         s390_agr  (code, ins->dreg, src2);
3170                 }
3171                         break;
3172                 case OP_IADC: {
3173                         g_assert_not_reached ();
3174                         CHECK_SRCDST_COM_I;
3175                         s390_alcgr (code, ins->dreg, src2);
3176                 }
3177                         break;
3178                 case OP_IADD_IMM: {
3179                         if (ins->dreg != ins->sreg1) {
3180                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3181                         }
3182                         if (s390_is_imm16 (ins->inst_imm)) {
3183                                 s390_aghi(code, ins->dreg, ins->inst_imm);
3184                         } else {
3185                                 s390_basr (code, s390_r13, 0);
3186                                 s390_j    (code, 4);
3187                                 s390_word (code, ins->inst_imm);
3188                                 s390_agf  (code, ins->dreg, 0, s390_r13, 4);
3189                         }
3190                 }
3191                         break;
3192                 case OP_IADC_IMM: {
3193                         if (ins->dreg != ins->sreg1) {
3194                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3195                         }
3196                         if (s390_is_imm16 (ins->inst_imm)) {
3197                                 s390_lghi  (code, s390_r0, ins->inst_imm);
3198                                 s390_alcgr (code, ins->dreg, s390_r0);
3199                         } else {
3200                                 s390_basr  (code, s390_r13, 0);
3201                                 s390_j     (code, 4);
3202                                 s390_word  (code, ins->inst_imm);
3203                                 s390_lgf   (code, s390_r13, 0, s390_r13, 4);
3204                                 s390_alcgr (code, ins->dreg, s390_r13);
3205                         }
3206                 }
3207                         break;
3208                 case CEE_ADD_OVF: {
3209                         CHECK_SRCDST_COM;
3210                         s390_ar    (code, ins->dreg, src2);
3211                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3212                         s390_lgfr  (code, ins->dreg, ins->dreg);
3213                 }
3214                         break;
3215                 case CEE_ADD_OVF_UN: {
3216                         CHECK_SRCDST_COM;
3217                         s390_algr  (code, ins->dreg, src2);
3218                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
3219                         s390_llgfr (code, ins->dreg, ins->dreg);
3220                 }
3221                         break;
3222                 case OP_ISUBCC: {
3223                         CHECK_SRCDST_NCOM_I;
3224                         s390_slgr (code, ins->dreg, src2);
3225                 }
3226                         break;
3227                 case OP_ISUB: {
3228                         CHECK_SRCDST_NCOM_I;
3229                         s390_sgr  (code, ins->dreg, src2);
3230                 }
3231                         break;
3232                 case OP_ISBB: {
3233                         CHECK_SRCDST_NCOM_I;
3234                         s390_slbgr (code, ins->dreg, src2);
3235                 }
3236                         break;
3237                 case OP_ISUB_IMM: {
3238                         if (ins->dreg != ins->sreg1) {
3239                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3240                         }
3241                         if (s390_is_imm16 (-ins->inst_imm)) {
3242                                 s390_aghi (code, ins->dreg, -ins->inst_imm);
3243                         } else {
3244                                 s390_basr (code, s390_r13, 0);
3245                                 s390_j    (code, 4);
3246                                 s390_word (code, ins->inst_imm);
3247                                 s390_sgf  (code, ins->dreg, 0, s390_r13, 4);
3248                         }
3249                 }
3250                         break;
3251                 case OP_ISBB_IMM: {
3252                         s390_basr (code, s390_r13, 0);
3253                         s390_j    (code, 4);
3254                         s390_word (code, ins->inst_imm);
3255                         s390_slgf (code, ins->dreg, 0, s390_r13, 4);
3256                 }
3257                         break;
3258                 case CEE_SUB_OVF: {
3259                         CHECK_SRCDST_NCOM;
3260                         s390_sr   (code, ins->dreg, src2);
3261                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3262                         s390_lgfr (code, ins->dreg, ins->dreg);
3263                 }
3264                         break;
3265                 case CEE_SUB_OVF_UN: {
3266                         CHECK_SRCDST_NCOM;
3267                         s390_slr  (code, ins->dreg, src2);
3268                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
3269                         s390_llgfr(code, ins->dreg, ins->dreg);
3270                 }
3271                         break;
3272                 case OP_IAND: {
3273                         CHECK_SRCDST_NCOM_I;
3274                         s390_ngr (code, ins->dreg, src2);
3275                 }
3276                         break;
3277                 case OP_IAND_IMM: {
3278                         if (ins->dreg != ins->sreg1) {
3279                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3280                         }
3281                         if (s390_is_imm16 (ins->inst_imm)) {
3282                                 s390_lghi (code, s390_r0, ins->inst_imm);
3283                                 s390_ngr  (code, ins->dreg, s390_r0);
3284                         } else {
3285                                 s390_basr (code, s390_r13, 0);
3286                                 s390_j    (code, 6);
3287                                 s390_llong(code, ins->inst_imm);
3288                                 s390_ng   (code, ins->dreg, 0, s390_r13, 4);
3289                         }
3290                 }
3291                         break;
3292                 case OP_IDIV: {
3293                         s390_lgfr (code, s390_r0, ins->sreg1);
3294                         s390_srda (code, s390_r0, 0, 32);
3295                         s390_dr   (code, s390_r0, ins->sreg2);
3296                         s390_lgfr (code, ins->dreg, s390_r1);
3297                 }
3298                         break;
3299                 case OP_IDIV_UN: {
3300                         s390_lgfr (code, s390_r0, ins->sreg1);
3301                         s390_srdl (code, s390_r0, 0, 32);
3302                         s390_dlr  (code, s390_r0, ins->sreg2);
3303                         s390_lgfr (code, ins->dreg, s390_r1);
3304                 }
3305                         break;
3306                 case OP_IDIV_IMM: {
3307                         if (s390_is_imm16 (ins->inst_imm)) {
3308                                 s390_lghi (code, s390_r13, ins->inst_imm);
3309                                 s390_lgfr (code, s390_r0, ins->sreg1);
3310                         } else {
3311                                 s390_basr (code, s390_r13, 0);
3312                                 s390_j    (code, 4);
3313                                 s390_word (code, ins->inst_imm);
3314                                 s390_lgfr (code, s390_r0, ins->sreg1);
3315                                 s390_lgf  (code, s390_r13, 0, s390_r13, 4);
3316                         }
3317                         s390_srda (code, s390_r0, 0, 32);
3318                         s390_dr   (code, s390_r0, ins->sreg2);
3319                         s390_lgfr (code, ins->dreg, s390_r1);
3320                 }
3321                         break;
3322                 case OP_IREM: {
3323                         s390_lgfr (code, s390_r0, ins->sreg1);
3324                         s390_srda (code, s390_r0, 0, 32);
3325                         s390_dr   (code, s390_r0, ins->sreg2);
3326                         s390_lgfr (code, ins->dreg, s390_r0);
3327                         break;
3328                 case OP_IREM_UN:
3329                         s390_lgfr (code, s390_r0, ins->sreg1);
3330                         s390_srdl (code, s390_r0, 0, 32);
3331                         s390_dlr  (code, s390_r0, ins->sreg2);
3332                         s390_lgfr (code, ins->dreg, s390_r0);
3333                 }
3334                         break;
3335                 case OP_IREM_IMM: {
3336                         if (s390_is_imm16 (ins->inst_imm)) {
3337                                 s390_lghi (code, s390_r13, ins->inst_imm);
3338                                 s390_lgfr (code, s390_r0, ins->sreg1);
3339                         } else {
3340                                 s390_basr (code, s390_r13, 0);
3341                                 s390_j    (code, 4);
3342                                 s390_word (code, ins->inst_imm);
3343                                 s390_lgfr (code, s390_r0, ins->sreg1);
3344                                 s390_lgf  (code, s390_r13, 0, s390_r13, 4);
3345                         }
3346                         s390_srda (code, s390_r0, 0, 32);
3347                         s390_dr   (code, s390_r0, ins->sreg2);
3348                         s390_lgfr (code, ins->dreg, s390_r0);
3349                 }
3350                         break;
3351                 case OP_IOR: {
3352                         CHECK_SRCDST_COM_I;
3353                         s390_ogr (code, ins->dreg, src2);
3354                 }
3355                         break;
3356                 case OP_IOR_IMM: {
3357                         if (ins->dreg != ins->sreg1) {
3358                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3359                         }
3360                         if (s390_is_imm16 (ins->inst_imm)) {
3361                                 s390_lghi (code, s390_r0, ins->inst_imm);
3362                                 s390_ogr  (code, ins->dreg, s390_r0);
3363                         } else {
3364                                 s390_basr (code, s390_r13, 0);
3365                                 s390_j    (code, 6);
3366                                 s390_llong(code, ins->inst_imm);
3367                                 s390_og   (code, ins->dreg, 0, s390_r13, 4);
3368                         }
3369                 }
3370                         break;
3371                 case OP_IXOR: {
3372                         CHECK_SRCDST_COM_I;
3373                         s390_xgr (code, ins->dreg, src2);
3374                 }
3375                         break;
3376                 case OP_IXOR_IMM: {
3377                         if (ins->dreg != ins->sreg1) {
3378                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3379                         }
3380                         if (s390_is_imm16 (ins->inst_imm)) {
3381                                 s390_lghi (code, s390_r0, ins->inst_imm);
3382                                 s390_xgr  (code, ins->dreg, s390_r0);
3383                         } else {
3384                                 s390_basr (code, s390_r13, 0);
3385                                 s390_j    (code, 6);
3386                                 s390_llong(code, ins->inst_imm);
3387                                 s390_xg   (code, ins->dreg, 0, s390_r13, 4);
3388                         }
3389                 }
3390                         break;
3391                 case OP_ISHL: {
3392                         if (ins->sreg1 != ins->dreg) {
3393                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3394                         }
3395                         s390_sll  (code, ins->dreg, ins->sreg2, 0);
3396                 }
3397                         break;
3398                 case OP_ISHL_IMM: {
3399                         if (ins->sreg1 != ins->dreg) {
3400                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3401                         }
3402                         s390_sll (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3403                 }
3404                         break;
3405                 case OP_ISHR: {
3406                         if (ins->sreg1 != ins->dreg) {
3407                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3408                         }
3409                         s390_sra (code, ins->dreg, ins->sreg2, 0);
3410                 }
3411                         break;
3412                 case OP_ISHR_IMM: {
3413                         if (ins->sreg1 != ins->dreg) {
3414                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3415                         }
3416                         s390_sra (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3417                 }
3418                         break;
3419                 case OP_ISHR_UN_IMM: {
3420                         if (ins->sreg1 != ins->dreg) {
3421                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3422                         }
3423                         s390_srl (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3424                 }
3425                         break;
3426                 case OP_ISHR_UN: {
3427                         if (ins->sreg1 != ins->dreg) {
3428                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3429                         }
3430                         s390_srl  (code, ins->dreg, ins->sreg2, 0);
3431                 }
3432                         break;
3433                 case OP_INOT: {
3434                         if (ins->sreg1 != ins->dreg) {
3435                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3436                         }
3437                         s390_lghi (code, s390_r0, -1);
3438                         s390_xgr  (code, ins->dreg, s390_r0);
3439                 }
3440                         break;
3441                 case OP_INEG: {
3442                         s390_lcgr (code, ins->dreg, ins->sreg1);
3443                 }
3444                         break;
3445                 case OP_IMUL: {
3446                         CHECK_SRCDST_COM_I;
3447                         s390_msr (code, ins->dreg, src2);
3448                 }
3449                         break;
3450                 case OP_IMUL_IMM: {
3451                         if (ins->dreg != ins->sreg1) {
3452                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3453                         }
3454                         if (s390_is_imm16 (ins->inst_imm)) {
3455                                 s390_lghi (code, s390_r13, ins->inst_imm);
3456                         } else {
3457                                 s390_basr (code, s390_r13, 0);
3458                                 s390_j    (code, 4);
3459                                 s390_word (code, ins->inst_imm);
3460                                 s390_lgf  (code, s390_r13, 0, s390_r13, 4);
3461                         }
3462                         s390_msr  (code, ins->dreg, s390_r13);
3463                 }
3464                         break;
3465                 case OP_IMUL_OVF: {
3466                         short int *o[2];
3467                         s390_ltr  (code, s390_r1, ins->sreg1);
3468                         s390_jz   (code, 0); CODEPTR(code, o[0]);
3469                         s390_ltr  (code, s390_r0, ins->sreg2);
3470                         s390_jnz  (code, 6);
3471                         s390_lhi  (code, s390_r1, 0);
3472                         s390_j    (code, 0); CODEPTR(code, o[1]);
3473                         s390_xr   (code, s390_r0, s390_r1);
3474                         s390_msr  (code, s390_r1, ins->sreg2);
3475                         s390_xr   (code, s390_r0, s390_r1);
3476                         s390_srl  (code, s390_r0, 0, 31);
3477                         s390_ltr  (code, s390_r0, s390_r0);
3478                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3479                         PTRSLOT   (code, o[0]);
3480                         PTRSLOT   (code, o[1]);
3481                         s390_lgfr (code, ins->dreg, s390_r1);
3482                 }
3483                         break;
3484                 case OP_IMUL_OVF_UN: {
3485                         s390_lhi  (code, s390_r0, 0);
3486                         s390_lr   (code, s390_r1, ins->sreg1);
3487                         s390_mlr  (code, s390_r0, ins->sreg2);
3488                         s390_ltr  (code, s390_r0, s390_r0);
3489                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3490                         s390_lgfr (code, ins->dreg, s390_r1);
3491                 }
3492                         break;
3493                 case OP_ICONST:
3494                 case OP_I8CONST:
3495                 case OP_SETREGIMM: {
3496                         if (s390_is_imm16(ins->inst_c0)) {
3497                                 s390_lghi (code, ins->dreg, ins->inst_c0);
3498                         } else {
3499                                 s390_basr (code, s390_r13, 0);
3500                                 s390_j    (code, 6);
3501                                 s390_llong(code, ins->inst_c0);
3502                                 s390_lg   (code, ins->dreg, 0, s390_r13, 4);
3503                         }
3504                 }
3505                         break;
3506                 case OP_AOTCONST: {
3507                         s390_basr (code, s390_r13, 0);
3508                         s390_j    (code, 6);
3509                         mono_add_patch_info (cfg, code - cfg->native_code,
3510                                 (MonoJumpInfoType)ins->inst_i1, ins->inst_p0);
3511                         s390_llong(code, 0);
3512                         s390_lg   (code,ins->dreg, 0, s390_r13, 4);
3513                 }
3514                         break;
3515                 case CEE_CONV_I:
3516                 case CEE_CONV_I8:
3517                 case OP_MOVE:
3518                 case OP_SETREG: {
3519                         if (ins->dreg != ins->sreg1) {
3520                                 s390_lgr (code, ins->dreg, ins->sreg1);
3521                         }
3522                 }
3523                         break;
3524                 case CEE_CONV_I4:
3525                         s390_lgfr (code, ins->dreg, ins->sreg1);
3526                         break;
3527                 case CEE_CONV_U:
3528                 case CEE_CONV_U8:
3529                 case CEE_CONV_U4:
3530                         s390_llgfr (code, ins->dreg, ins->sreg1);
3531                         break;
3532                 case CEE_CONV_OVF_U4:
3533                         s390_basr (code, s390_r13, 0);
3534                         s390_j    (code, 6);
3535                         s390_llong(code, 4294967295);
3536                         s390_clg  (code, ins->sreg1, 0, s390_r13, 4);
3537                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GT, "OverflowException");
3538                         s390_ltgr (code, ins->sreg1, ins->sreg1);
3539                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, "OverflowException");
3540                         s390_llgfr(code, ins->dreg, ins->sreg1);
3541                         break;
3542                 case CEE_CONV_OVF_I4_UN:
3543                         s390_basr (code, s390_r13, 0);
3544                         s390_j    (code, 6);
3545                         s390_llong(code, 2147483647);
3546                         s390_cg   (code, ins->sreg1, 0, s390_r13, 4);
3547                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GT, "OverflowException");
3548                         s390_ltgr (code, ins->sreg1, ins->sreg1);
3549                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, "OverflowException");
3550                         s390_lgfr (code, ins->dreg, ins->sreg1);
3551                         break;
3552                 case OP_SETFREG:
3553                 case OP_FMOVE: {
3554                         if (ins->dreg != ins->sreg1) {
3555                                 s390_ldr   (code, ins->dreg, ins->sreg1);
3556                         }
3557                 }
3558                         break;
3559                 case OP_S390_SETF4RET: {
3560                         s390_ledbr (code, ins->dreg, ins->sreg1);
3561                 }
3562                         break;
3563                 case OP_FCONV_TO_R4: {
3564                         g_error ("Shouldn't be reached");
3565                         if ((ins->next) &&
3566                             (ins->next->opcode != OP_FMOVE) &&
3567                             (ins->next->opcode != OP_STORER4_MEMBASE_REG))
3568                                 s390_ledbr (code, ins->dreg, ins->sreg1);
3569                 }
3570                         break;
3571                 case CEE_JMP: {
3572                         if (cfg->method->save_lmf)
3573                                 restoreLMF(code, cfg->frame_reg, cfg->stack_usage);
3574
3575                         if (cfg->flags & MONO_CFG_HAS_TAIL) {
3576                                 code =  emit_load_volatile_registers(code, cfg);
3577                         }
3578
3579                         code = backUpStackPtr(cfg, code);
3580                         s390_lg  (code, s390_r14, 0, STK_BASE, S390_RET_ADDR_OFFSET);
3581                         mono_add_patch_info (cfg, code - cfg->native_code,
3582                                              MONO_PATCH_INFO_METHOD_JUMP,
3583                                              ins->inst_p0);
3584                         s390_jcl (code, S390_CC_UN, 0);
3585                 }
3586                         break;
3587                 case OP_CHECK_THIS: {
3588                         /* ensure ins->sreg1 is not NULL */
3589                         s390_lg   (code, s390_r0, 0, ins->sreg1, 0);
3590                         s390_ltgr (code, s390_r0, s390_r0);
3591                 }
3592                         break;
3593                 case OP_ARGLIST: {
3594                         int offset = cfg->sig_cookie + cfg->stack_usage;
3595
3596                         if (s390_is_imm16 (offset))
3597                                 s390_lghi (code, s390_r0, offset);
3598                         else {
3599                                 s390_basr (code, s390_r13, 0);
3600                                 s390_j    (code, 6);
3601                                 s390_llong(code, offset);
3602                                 s390_lg   (code, s390_r0, 0, s390_r13, 0);
3603                         }
3604                         s390_agr  (code, s390_r0, cfg->frame_reg);
3605                         s390_stg  (code, s390_r0, 0, ins->sreg1, 0);
3606                 }
3607                         break;
3608                 case OP_FCALL: {
3609                         s390_basr (code, s390_r13, 0);
3610                         s390_j    (code, 6);
3611                         call = (MonoCallInst*)ins;
3612                         if (ins->flags & MONO_INST_HAS_METHOD)
3613                                 mono_add_patch_info (cfg, code-cfg->native_code,
3614                                                      MONO_PATCH_INFO_METHOD,
3615                                                      call->method);
3616                         else
3617                                 mono_add_patch_info (cfg, code-cfg->native_code,
3618                                                      MONO_PATCH_INFO_ABS,
3619                                                      call->fptr);
3620                         s390_llong(code, 0);
3621                         s390_lg   (code, s390_r14, 0, s390_r13, 4);
3622                         s390_basr (code, s390_r14, s390_r14);
3623                         if (call->signature->ret->type == MONO_TYPE_R4)
3624                                 s390_ldebr (code, s390_f0, s390_f0);
3625                 }
3626                         break;
3627                 case OP_LCALL:
3628                 case OP_VCALL:
3629                 case OP_VOIDCALL:
3630                 case CEE_CALL: {
3631                         s390_basr (code, s390_r13, 0);
3632                         s390_j    (code, 6);
3633                         call = (MonoCallInst*)ins;
3634                         if (ins->flags & MONO_INST_HAS_METHOD)
3635                                 mono_add_patch_info (cfg, code-cfg->native_code,
3636                                                      MONO_PATCH_INFO_METHOD,
3637                                                      call->method);
3638                         else
3639                                 mono_add_patch_info (cfg, code-cfg->native_code,
3640                                                      MONO_PATCH_INFO_ABS,
3641                                                      call->fptr);
3642                         s390_llong(code, 0);
3643                         s390_lg   (code, s390_r14, 0, s390_r13, 4);
3644                         s390_basr (code, s390_r14, s390_r14);
3645                 }
3646                         break;
3647                 case OP_FCALL_REG: {
3648                         call = (MonoCallInst*)ins;
3649                         s390_lgr  (code, s390_r1, ins->sreg1);
3650                         s390_basr (code, s390_r14, s390_r1);
3651                         if (call->signature->ret->type == MONO_TYPE_R4)
3652                                 s390_ldebr (code, s390_f0, s390_f0);
3653                 }
3654                         break;
3655                 case OP_LCALL_REG:
3656                 case OP_VCALL_REG:
3657                 case OP_VOIDCALL_REG:
3658                 case OP_CALL_REG: {
3659                         s390_lgr  (code, s390_r1, ins->sreg1);
3660                         s390_basr (code, s390_r14, s390_r1);
3661                 }
3662                         break;
3663                 case OP_FCALL_MEMBASE: {
3664                         call = (MonoCallInst*)ins;
3665                         s390_lg   (code, s390_r1, 0, ins->sreg1, ins->inst_offset);
3666                         s390_basr (code, s390_r14, s390_r1);
3667                         if (call->signature->ret->type == MONO_TYPE_R4)
3668                                 s390_ldebr (code, s390_f0, s390_f0);
3669                 }
3670                         break;
3671                 case OP_LCALL_MEMBASE:
3672                 case OP_VCALL_MEMBASE:
3673                 case OP_VOIDCALL_MEMBASE:
3674                 case OP_CALL_MEMBASE: {
3675                         s390_lg   (code, s390_r1, 0, ins->sreg1, ins->inst_offset);
3676                         s390_basr (code, s390_r14, s390_r1);
3677                 }
3678                         break;
3679                 case OP_OUTARG:
3680                         g_assert_not_reached ();
3681                         break;
3682                 case OP_LOCALLOC: {
3683                         int alloca_skip = S390_MINIMAL_STACK_SIZE + cfg->param_area;
3684                         int area_offset = S390_ALIGN(alloca_skip, S390_STACK_ALIGNMENT);
3685                         s390_lgr  (code, s390_r1, ins->sreg1);
3686                         if (ins->flags & MONO_INST_INIT)
3687                                 s390_lgr  (code, s390_r0, ins->sreg1);
3688                         s390_aghi (code, s390_r1, 14);
3689                         s390_srlg (code, s390_r1, s390_r1, 0, 3);
3690                         s390_sllg (code, s390_r1, s390_r1, 0, 3);
3691                         if (cfg->method->save_lmf) {
3692                                 /*----------------------------------*/
3693                                 /* we have to adjust lmf ebp value  */
3694                                 /*----------------------------------*/
3695                                 int lmfOffset = cfg->stack_usage - sizeof(MonoLMF);
3696
3697                                 s390_lgr (code, s390_r13, cfg->frame_reg);
3698                                 if (s390_is_uimm16(lmfOffset))
3699                                         s390_aghi (code, s390_r13, lmfOffset);
3700                                 else {
3701                                         s390_basr (code, s390_r14, 0);
3702                                         s390_j    (code, 4);
3703                                         s390_word (code, lmfOffset);
3704                                         s390_agf  (code, s390_r13, 0, s390_r14, 4);
3705                                 }
3706                                 s390_lgr (code, s390_r14, STK_BASE);
3707                                 s390_sgr (code, s390_r14, s390_r1);
3708                                 s390_stg (code, s390_r14, 0, s390_r13,
3709                                           G_STRUCT_OFFSET(MonoLMF, ebp));
3710                         }
3711                         s390_lg   (code, s390_r13, 0, STK_BASE, 0);
3712                         s390_sgr  (code, STK_BASE, s390_r1);
3713                         s390_stg  (code, s390_r13, 0, STK_BASE, 0);
3714                         s390_la   (code, ins->dreg, 0, STK_BASE, area_offset);
3715                         s390_srlg (code, ins->dreg, ins->dreg, 0, 3);
3716                         s390_sllg (code, ins->dreg, ins->dreg, 0, 3);
3717                         if (ins->flags & MONO_INST_INIT) {
3718                                 s390_lgr  (code, s390_r1, s390_r0);
3719                                 s390_lgr  (code, s390_r0, ins->dreg);
3720                                 s390_lgr  (code, s390_r14, s390_r12);
3721                                 s390_lghi (code, s390_r13, 0);
3722                                 s390_mvcle(code, s390_r0, s390_r12, 0, 0);
3723                                 s390_jo   (code, -2);
3724                                 s390_lgr  (code, s390_r12, s390_r14);
3725                         }
3726                 }
3727                         break;
3728                 case CEE_RET: {
3729                         s390_br  (code, s390_r14);
3730                 }
3731                         break;
3732                 case CEE_THROW: {
3733                         s390_lgr  (code, s390_r2, ins->sreg1);
3734                         s390_basr (code, s390_r13, 0);
3735                         s390_j    (code, 6);
3736                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD,
3737                                              (gpointer) "mono_arch_throw_exception");
3738                         s390_llong(code, 0);
3739                         s390_lg   (code, s390_r14, 0, s390_r13, 4);
3740                         s390_basr (code, s390_r14, s390_r14);
3741                 }
3742                         break;
3743                 case OP_RETHROW: {
3744                         s390_lgr  (code, s390_r2, ins->sreg1);
3745                         s390_basr (code, s390_r13, 0);
3746                         s390_j    (code, 6);
3747                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD,
3748                                              (gpointer) "mono_arch_rethrow_exception");
3749                         s390_llong(code, 0);
3750                         s390_lg   (code, s390_r14, 0, s390_r13, 4);
3751                         s390_basr (code, s390_r14, s390_r14);
3752                 }
3753                         break;
3754                 case OP_START_HANDLER: {
3755                         S390_LONG (code, stg, stg, s390_r14, 0,
3756                                    ins->inst_left->inst_basereg,
3757                                    ins->inst_left->inst_offset);
3758                 }
3759                         break;
3760                 case OP_ENDFILTER: {
3761                         if (ins->sreg1 != s390_r2)
3762                                 s390_lgr(code, s390_r2, ins->sreg1);
3763                         S390_LONG (code, lg, lg, s390_r14, 0,
3764                                    ins->inst_left->inst_basereg,
3765                                    ins->inst_left->inst_offset);
3766                         s390_br  (code, s390_r14);
3767                 }
3768                         break;
3769                 case CEE_ENDFINALLY: {
3770                         S390_LONG (code, lg, lg, s390_r14, 0,
3771                                    ins->inst_left->inst_basereg,
3772                                    ins->inst_left->inst_offset);
3773                         s390_br  (code, s390_r14);
3774                 }
3775                         break;
3776                 case OP_CALL_HANDLER: {
3777                         mono_add_patch_info (cfg, code-cfg->native_code,
3778                                              MONO_PATCH_INFO_BB, ins->inst_target_bb);
3779                         s390_brasl (code, s390_r14, 0);
3780                 }
3781                         break;
3782                 case OP_LABEL: {
3783                         ins->inst_c0 = code - cfg->native_code;
3784                 }
3785                         break;
3786                 case CEE_BR:
3787                         EMIT_UNCOND_BRANCH(ins);
3788                         break;
3789                 case OP_BR_REG: {
3790                         s390_br  (code, ins->sreg1);
3791                 }
3792                         break;
3793                 case OP_CEQ:
3794                 case OP_ICEQ: {
3795                         s390_lghi(code, ins->dreg, 1);
3796                         s390_jz  (code, 4);
3797                         s390_lghi(code, ins->dreg, 0);
3798                 }
3799                         break;
3800                 case OP_CLT:
3801                 case OP_ICLT: {
3802                         s390_lghi(code, ins->dreg, 1);
3803                         s390_jl  (code, 4);
3804                         s390_lghi(code, ins->dreg, 0);
3805                 }
3806                         break;
3807                 case OP_CLT_UN:
3808                 case OP_ICLT_UN: {
3809                         s390_lghi(code, ins->dreg, 1);
3810                         s390_jlo (code, 4);
3811                         s390_lghi(code, ins->dreg, 0);
3812                 }
3813                         break;
3814                 case OP_CGT:
3815                 case OP_ICGT: {
3816                         s390_lghi(code, ins->dreg, 1);
3817                         s390_jh  (code, 4);
3818                         s390_lghi(code, ins->dreg, 0);
3819                 }
3820                         break;
3821                 case OP_CGT_UN:
3822                 case OP_ICGT_UN: {
3823                         s390_lghi(code, ins->dreg, 1);
3824                         s390_jho (code, 4);
3825                         s390_lghi(code, ins->dreg, 0);
3826                 }
3827                         break;
3828                 case OP_COND_EXC_EQ:
3829                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_EQ, ins->inst_p1);
3830                         break;
3831                 case OP_COND_EXC_NE_UN:
3832                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NE, ins->inst_p1);
3833                         break;
3834                 case OP_COND_EXC_LT:
3835                 case OP_COND_EXC_LT_UN:
3836                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, ins->inst_p1);
3837                         break;
3838                 case OP_COND_EXC_GT:
3839                 case OP_COND_EXC_GT_UN:
3840                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GT, ins->inst_p1);
3841                         break;
3842                 case OP_COND_EXC_GE:
3843                 case OP_COND_EXC_GE_UN:
3844                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GE, ins->inst_p1);
3845                         break;
3846                 case OP_COND_EXC_LE:
3847                 case OP_COND_EXC_LE_UN:
3848                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LE, ins->inst_p1);
3849                         break;
3850                 case OP_COND_EXC_OV:
3851                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, ins->inst_p1);
3852                         break;
3853                 case OP_COND_EXC_NO:
3854                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NO, ins->inst_p1);
3855                         break;
3856                 case OP_COND_EXC_C:
3857                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, ins->inst_p1);
3858                         break;
3859                 case OP_COND_EXC_NC:
3860                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, ins->inst_p1);
3861                         break;
3862                 case CEE_BEQ:
3863                 case OP_IBEQ:
3864                         EMIT_COND_BRANCH (ins, S390_CC_EQ);
3865                         break;
3866                 case CEE_BNE_UN:
3867                 case OP_IBNE_UN:
3868                         EMIT_COND_BRANCH (ins, S390_CC_NE);
3869                         break;
3870                 case CEE_BLT:
3871                 case CEE_BLT_UN:
3872                 case OP_IBLT:
3873                 case OP_IBLT_UN:
3874                         EMIT_COND_BRANCH (ins, S390_CC_LT);
3875                         break;
3876                 case CEE_BGT:
3877                 case CEE_BGT_UN:
3878                 case OP_IBGT:
3879                 case OP_IBGT_UN:
3880                         EMIT_COND_BRANCH (ins, S390_CC_GT);
3881                         break;
3882                 case CEE_BGE:
3883                 case CEE_BGE_UN:
3884                 case OP_IBGE:
3885                 case OP_IBGE_UN:
3886                         EMIT_COND_BRANCH (ins, S390_CC_GE);
3887                         break;
3888                 case CEE_BLE:
3889                 case CEE_BLE_UN:
3890                 case OP_IBLE:
3891                 case OP_IBLE_UN:
3892                         EMIT_COND_BRANCH (ins, S390_CC_LE);
3893                         break;
3894
3895                 /* floating point opcodes */
3896                 case OP_R8CONST: {
3897                         if (*((float *) ins->inst_p0) == 0) {
3898                                 s390_lzdr (code, ins->dreg);
3899                         } else {
3900                                 s390_basr  (code, s390_r13, 0);
3901                                 s390_j     (code, 6);
3902                                 s390_llong (code, ins->inst_p0);
3903                                 s390_lg    (code, s390_r13, 0, s390_r13, 4);
3904                                 s390_ld    (code, ins->dreg, 0, s390_r13, 0);
3905                         }
3906                 }
3907                         break;
3908                 case OP_R4CONST: {
3909                         if (*((float *) ins->inst_p0) == 0) {
3910                                 s390_lzdr (code, ins->dreg);
3911                         } else {
3912                                 s390_basr (code, s390_r13, 0);
3913                                 s390_j    (code, 6);
3914                                 s390_llong(code, ins->inst_p0);
3915                                 s390_lg   (code, s390_r13, 0, s390_r13, 4);
3916                                 s390_ldeb (code, ins->dreg, 0, s390_r13, 0);
3917                         }
3918                 }
3919                         break;
3920                 case OP_STORER8_MEMBASE_REG: {
3921                         S390_LONG (code, stdy, std, ins->sreg1, 0,
3922                                    ins->inst_destbasereg, ins->inst_offset);
3923                 }
3924                         break;
3925                 case OP_LOADR8_MEMBASE: {
3926                         S390_LONG (code, ldy, ld, ins->dreg, 0,
3927                                    ins->inst_basereg, ins->inst_offset);
3928                 }
3929                         break;
3930                 case OP_STORER4_MEMBASE_REG: {
3931                         s390_ledbr (code, s390_f15, ins->sreg1);
3932                         S390_LONG (code, stey, ste, s390_f15, 0,
3933                                    ins->inst_destbasereg, ins->inst_offset);
3934                 }
3935                         break;
3936                 case OP_LOADR4_MEMBASE: {
3937                         S390_LONG (code, ldy, ld, s390_f15, 0,
3938                                    ins->inst_basereg, ins->inst_offset);
3939                         s390_ldebr (code, ins->dreg, s390_f15);
3940                 }
3941                         break;
3942                 case CEE_CONV_R_UN: {
3943                         s390_cdgbr (code, ins->dreg, ins->sreg1);
3944                         s390_ltgr  (code, ins->sreg1, ins->sreg1);
3945                         s390_jnl   (code, 12);
3946                         s390_basr  (code, s390_r13, 0);
3947                         s390_j     (code, 6);
3948                         s390_word  (code, 0x41f00000);
3949                         s390_word  (code, 0);
3950                         s390_adb   (code, ins->dreg, 0, s390_r13, 4);
3951                 }
3952                         break;
3953                 case OP_LCONV_TO_R4:
3954                 case CEE_CONV_R4: {
3955                         s390_cdgbr (code, ins->dreg, ins->sreg1);
3956                 }
3957                         break;
3958                 case OP_LCONV_TO_R8:
3959                 case CEE_CONV_R8: {
3960                         s390_cdgbr (code, ins->dreg, ins->sreg1);
3961                 }
3962                         break;
3963                 case OP_FCONV_TO_I1:
3964                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 1, TRUE);
3965                         break;
3966                 case OP_FCONV_TO_U1:
3967                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 1, FALSE);
3968                         break;
3969                 case OP_FCONV_TO_I2:
3970                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 2, TRUE);
3971                         break;
3972                 case OP_FCONV_TO_U2:
3973                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 2, FALSE);
3974                         break;
3975                 case OP_FCONV_TO_I4:
3976                 case OP_FCONV_TO_I:
3977                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 4, TRUE);
3978                         break;
3979                 case OP_FCONV_TO_U4:
3980                 case OP_FCONV_TO_U:
3981                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 4, FALSE);
3982                         break;
3983                 case OP_FCONV_TO_I8:
3984                         s390_cgdbr (code, ins->dreg, 5, ins->sreg1);
3985                         break;
3986                 case OP_FCONV_TO_U8:
3987                         g_assert_not_reached ();
3988                         /* Implemented as helper calls */
3989                         break;
3990                 case OP_LCONV_TO_R_UN:
3991                         g_assert_not_reached ();
3992                         /* Implemented as helper calls */
3993                         break;
3994                 case OP_LCONV_TO_OVF_I: {
3995                         /* Valid ints: 0xffffffff:8000000 to 00000000:0x7f000000 */
3996                         short int *o[5];
3997                         s390_ltgr (code, ins->sreg2, ins->sreg2);
3998                         s390_jnl  (code, 0); CODEPTR(code, o[0]);
3999                         s390_ltgr (code, ins->sreg1, ins->sreg1);
4000                         s390_jnl  (code, 0); CODEPTR(code, o[1]);
4001                         s390_lhi  (code, s390_r13, -1);
4002                         s390_cgr  (code, ins->sreg1, s390_r13);
4003                         s390_jnz  (code, 0); CODEPTR(code, o[2]);
4004                         if (ins->dreg != ins->sreg2)
4005                                 s390_lgr  (code, ins->dreg, ins->sreg2);
4006                         s390_j    (code, 0); CODEPTR(code, o[3]);
4007                         PTRSLOT(code, o[0]);
4008                         s390_jz   (code, 0); CODEPTR(code, o[4]);
4009                         PTRSLOT(code, o[1]);
4010                         PTRSLOT(code, o[2]);
4011                         mono_add_patch_info (cfg, code - cfg->native_code,
4012                                              MONO_PATCH_INFO_EXC, "OverflowException");
4013                         s390_brasl (code, s390_r14, 0);
4014                         PTRSLOT(code, o[3]);
4015                         PTRSLOT(code, o[4]);
4016                 }
4017                         break;
4018                 case OP_ABS: {
4019                         s390_lpdbr (code, ins->dreg, ins->sreg1);
4020                 }
4021                         break;
4022                 case OP_SQRT: {
4023                         s390_sqdbr (code, ins->dreg, ins->sreg1);
4024                 }
4025                         break;
4026                 case OP_FADD: {
4027                         CHECK_SRCDST_COM_F;
4028                         s390_adbr (code, ins->dreg, src2);
4029                 }
4030                         break;
4031                 case OP_FSUB: {
4032                         CHECK_SRCDST_NCOM_F;
4033                         s390_sdbr (code, ins->dreg, src2);
4034                 }
4035                         break;
4036                 case OP_FMUL: {
4037                         CHECK_SRCDST_COM_F;
4038                         s390_mdbr (code, ins->dreg, src2);
4039                 }
4040                         break;
4041                 case OP_FDIV: {
4042                         CHECK_SRCDST_NCOM_F;
4043                         s390_ddbr (code, ins->dreg, src2);
4044                 }
4045                         break;
4046                 case OP_FNEG: {
4047                         s390_lcdbr (code, ins->dreg, ins->sreg1);
4048                 }
4049                         break;
4050                 case OP_FREM: {
4051                         CHECK_SRCDST_NCOM_F;
4052                         s390_didbr (code, ins->dreg, src2, 5, s390_f15);
4053                 }
4054                         break;
4055                 case OP_FCOMPARE: {
4056                         s390_cdbr (code, ins->sreg1, ins->sreg2);
4057                 }
4058                         break;
4059                 case OP_FCEQ: {
4060                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4061                         s390_lghi  (code, ins->dreg, 1);
4062                         s390_je    (code, 4);
4063                         s390_lghi  (code, ins->dreg, 0);
4064                 }
4065                         break;
4066                 case OP_FCLT: {
4067                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4068                         s390_lghi  (code, ins->dreg, 1);
4069                         s390_jl    (code, 4);
4070                         s390_lghi  (code, ins->dreg, 0);
4071                 }
4072                         break;
4073                 case OP_FCLT_UN: {
4074                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4075                         s390_lghi  (code, ins->dreg, 1);
4076                         s390_jlo   (code, 4);
4077                         s390_lghi  (code, ins->dreg, 0);
4078                 }
4079                         break;
4080                 case OP_FCGT: {
4081                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4082                         s390_lghi  (code, ins->dreg, 1);
4083                         s390_jh    (code, 4);
4084                         s390_lghi  (code, ins->dreg, 0);
4085                 }
4086                         break;
4087                 case OP_FCGT_UN: {
4088                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4089                         s390_lghi  (code, ins->dreg, 1);
4090                         s390_jho   (code, 4);
4091                         s390_lghi  (code, ins->dreg, 0);
4092                 }
4093                         break;
4094                 case OP_FBEQ:
4095                         EMIT_COND_BRANCH (ins, S390_CC_EQ|S390_CC_OV);
4096                         break;
4097                 case OP_FBNE_UN:
4098                         EMIT_COND_BRANCH (ins, S390_CC_NE|S390_CC_OV);
4099                         break;
4100                 case OP_FBLT:
4101                         EMIT_COND_BRANCH (ins, S390_CC_LT);
4102                         break;
4103                 case OP_FBLT_UN:
4104                         EMIT_COND_BRANCH (ins, S390_CC_LT|S390_CC_OV);
4105                         break;
4106                 case OP_FBGT:
4107                         EMIT_COND_BRANCH (ins, S390_CC_GT);
4108                         break;
4109                 case OP_FBGT_UN:
4110                         EMIT_COND_BRANCH (ins, S390_CC_GT|S390_CC_OV);
4111                         break;
4112                 case OP_FBGE:
4113                         EMIT_COND_BRANCH (ins, S390_CC_GE);
4114                         break;
4115                 case OP_FBGE_UN:
4116                         EMIT_COND_BRANCH (ins, S390_CC_GE|S390_CC_OV);
4117                         break;
4118                 case OP_FBLE:
4119                         EMIT_COND_BRANCH (ins, S390_CC_LE);
4120                         break;
4121                 case OP_FBLE_UN:
4122                         EMIT_COND_BRANCH (ins, S390_CC_LE|S390_CC_OV);
4123                         break;
4124                 case CEE_CKFINITE: {
4125                         short *o;
4126                         s390_lhi  (code, s390_r13, 0x7f);
4127                         s390_tcdb (code, ins->sreg1, 0, s390_r13, 0);
4128                         s390_jz   (code, 0); CODEPTR(code, o);
4129                         mono_add_patch_info (cfg, code - cfg->native_code,
4130                                              MONO_PATCH_INFO_EXC, "ArithmeticException");
4131                         s390_brasl (code, s390_r14,0);
4132                         PTRSLOT(code, o);
4133                 }
4134                         break;
4135                 case OP_S390_MOVE: {
4136                         if (ins->backend.size > 0) {
4137                                 if (ins->backend.size <= 256) {
4138                                         s390_mvc  (code, ins->backend.size, ins->dreg,
4139                                                    ins->inst_offset, ins->sreg1, ins->inst_imm);
4140                                 } else {
4141                                         s390_lgr  (code, s390_r0, ins->dreg);
4142                                         if (s390_is_imm16 (ins->inst_offset)) {
4143                                                 s390_aghi (code, s390_r0, ins->inst_offset);
4144                                         } else {
4145                                                 s390_basr (code, s390_r13, 0);
4146                                                 s390_j    (code, 6);
4147                                                 s390_llong(code, ins->inst_offset);
4148                                                 s390_a    (code, s390_r0, 0, s390_r13, 4);
4149                                         }
4150                                         s390_lgr  (code, s390_r12, ins->sreg1);
4151                                         if (s390_is_imm16 (ins->inst_imm)) {
4152                                                 s390_aghi (code, s390_r12, ins->inst_imm);
4153                                         } else {
4154                                                 s390_basr (code, s390_r13, 0);
4155                                                 s390_j    (code, 6);
4156                                                 s390_llong(code, ins->inst_imm);
4157                                                 s390_ag   (code, s390_r12, 0, s390_r13, 4);
4158                                         }
4159                                         s390_lgr  (code, s390_r1, ins->sreg1);
4160                                         s390_lgr  (code, s390_r13, s390_r1);
4161                                         s390_mvcle(code, s390_r0, s390_r12, 0, 0);
4162                                         s390_jo   (code, -2);
4163                                 }
4164                         }
4165                 }
4166                         break;
4167                 case OP_ATOMIC_ADD_I8: {
4168                         s390_lgr (code, s390_r1, ins->sreg2);
4169                         s390_lg  (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4170                         s390_agr (code, s390_r1, s390_r0);
4171                         s390_csg (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
4172                         s390_jnz (code, -10);
4173                         s390_lgr (code, ins->dreg, s390_r1);
4174                 }
4175                         break;
4176                 case OP_ATOMIC_ADD_NEW_I8: {
4177                         s390_lgr (code, s390_r1, ins->sreg2);
4178                         s390_lg  (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4179                         s390_agr (code, s390_r1, s390_r0);
4180                         s390_csg (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
4181                         s390_jnz (code, -10);
4182                         s390_lgr (code, ins->dreg, s390_r1);
4183                 }
4184                         break;
4185                 case OP_ATOMIC_EXCHANGE_I8: {
4186                         s390_lg  (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4187                         s390_csg (code, s390_r0, ins->sreg2, ins->inst_basereg, ins->inst_offset);
4188                         s390_jnz (code, -6);
4189                         s390_lgr (code, ins->dreg, s390_r0);
4190                 }
4191                         break;
4192                 case OP_ATOMIC_ADD_I4: {
4193                         s390_lgfr(code, s390_r1, ins->sreg2);
4194                         s390_lgf (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4195                         s390_agr (code, s390_r1, s390_r0);
4196                         s390_cs  (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
4197                         s390_jnz (code, -9);
4198                         s390_lgfr(code, ins->dreg, s390_r1);
4199                 }
4200                         break;
4201                 case OP_ATOMIC_ADD_NEW_I4: {
4202                         s390_lgfr(code, s390_r1, ins->sreg2);
4203                         s390_lgf (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4204                         s390_agr (code, s390_r1, s390_r0);
4205                         s390_cs  (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
4206                         s390_jnz (code, -9);
4207                         s390_lgfr(code, ins->dreg, s390_r1);
4208                 }
4209                         break;
4210                 case OP_ATOMIC_EXCHANGE_I4: {
4211                         s390_lg  (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4212                         s390_cs  (code, s390_r0, ins->sreg2, ins->inst_basereg, ins->inst_offset);
4213                         s390_jnz (code, -4);
4214                         s390_lgfr(code, ins->dreg, s390_r0);
4215                 }
4216                         break;
4217                 case OP_S390_BKCHAIN: {
4218                         s390_lgr  (code, ins->dreg, ins->sreg1);
4219                         if (s390_is_imm16 (cfg->stack_offset)) {
4220                                 s390_aghi (code, ins->dreg, cfg->stack_offset);
4221                         } else {
4222                                 s390_basr (code, s390_r13, 0);
4223                                 s390_j    (code, 6);
4224                                 s390_llong(code, cfg->stack_offset);
4225                                 s390_ag   (code, ins->dreg, 0, s390_r13, 4);
4226                         }
4227                 }
4228                         break;
4229                 case OP_MEMORY_BARRIER: {
4230                 }
4231                         break;
4232                 default:
4233                         g_warning ("unknown opcode %s in %s()\n", mono_inst_name (ins->opcode), __FUNCTION__);
4234                         g_assert_not_reached ();
4235                 }
4236
4237                 if ((cfg->opt & MONO_OPT_BRANCH) && ((code - cfg->native_code - offset) > max_len)) {
4238                         g_warning ("wrong maximal instruction length of instruction %s (expected %d, got %ld)",
4239                                    mono_inst_name (ins->opcode), max_len, code - cfg->native_code - offset);
4240                         g_assert_not_reached ();
4241                 }
4242
4243                 cpos += max_len;
4244
4245                 last_ins = ins;
4246                 last_offset = offset;
4247
4248                 ins = ins->next;
4249         }
4250
4251         cfg->code_len = code - cfg->native_code;
4252 }
4253
4254 /*========================= End of Function ========================*/
4255
4256 /*------------------------------------------------------------------*/
4257 /*                                                                  */
4258 /* Name         - mono_arch_register_lowlevel_calls                 */
4259 /*                                                                  */
4260 /* Function     - Register routines to help with --trace operation. */
4261 /*                                                                  */
4262 /*------------------------------------------------------------------*/
4263
4264 void
4265 mono_arch_register_lowlevel_calls (void)
4266 {
4267         mono_register_jit_icall (mono_arch_break, "mono_arch_break", NULL, TRUE);
4268         mono_register_jit_icall (mono_arch_get_lmf_addr, "mono_arch_get_lmf_addr", NULL, TRUE);
4269 }
4270
4271 /*========================= End of Function ========================*/
4272
4273 /*------------------------------------------------------------------*/
4274 /*                                                                  */
4275 /* Name         - mono_arch_break                                   */
4276 /*                                                                  */
4277 /* Function     - Process a "break" operation for debugging.        */
4278 /*                                                                  */
4279 /*------------------------------------------------------------------*/
4280
4281 static void
4282 mono_arch_break(void) {
4283 }
4284
4285 /*========================= End of Function ========================*/
4286
4287 /*------------------------------------------------------------------*/
4288 /*                                                                  */
4289 /* Name         - mono_arch_patch_code                              */
4290 /*                                                                  */
4291 /* Function     - Process the patch data created during the         */
4292 /*                instruction build process. This resolves jumps,   */
4293 /*                calls, variables etc.                             */
4294 /*                                                                  */
4295 /*------------------------------------------------------------------*/
4296
4297 void
4298 mono_arch_patch_code (MonoMethod *method, MonoDomain *domain,
4299                       guint8 *code, MonoJumpInfo *ji, gboolean run_cctors)
4300 {
4301         MonoJumpInfo *patch_info;
4302
4303         for (patch_info = ji; patch_info; patch_info = patch_info->next) {
4304                 unsigned char *ip = patch_info->ip.i + code;
4305                 gconstpointer target = NULL;
4306
4307                 target = mono_resolve_patch_target (method, domain, code,
4308                                                     patch_info, run_cctors);
4309
4310                 switch (patch_info->type) {
4311                         case MONO_PATCH_INFO_IP:
4312                         case MONO_PATCH_INFO_EXC_NAME:
4313                         case MONO_PATCH_INFO_LDSTR:
4314                         case MONO_PATCH_INFO_TYPE_FROM_HANDLE:
4315                         case MONO_PATCH_INFO_LDTOKEN:
4316                         case MONO_PATCH_INFO_EXC:
4317                         case MONO_PATCH_INFO_ABS:
4318                         case MONO_PATCH_INFO_METHOD:
4319                         case MONO_PATCH_INFO_INTERNAL_METHOD:
4320                         case MONO_PATCH_INFO_CLASS_INIT:
4321                                 s390_patch_addr (ip, (guint64) target);
4322                                 continue;
4323                         case MONO_PATCH_INFO_SWITCH:
4324                                 /*----------------------------------*/
4325                                 /* ip points at the basr r13,0/j +4 */
4326                                 /* instruction the vtable value     */
4327                                 /* follows this (i.e. ip+6)         */
4328                                 /*----------------------------------*/
4329                                 *((gconstpointer *)(ip+6)) = target;
4330                                 continue;
4331                         case MONO_PATCH_INFO_METHODCONST:
4332                         case MONO_PATCH_INFO_CLASS:
4333                         case MONO_PATCH_INFO_IMAGE:
4334                         case MONO_PATCH_INFO_FIELD:
4335                         case MONO_PATCH_INFO_IID:
4336                                 target = S390_RELATIVE(target, ip);
4337                                 s390_patch_rel (ip, (guint64) target);
4338                                 continue;
4339                         case MONO_PATCH_INFO_R4:
4340                         case MONO_PATCH_INFO_R8:
4341                         case MONO_PATCH_INFO_METHOD_REL:
4342                                 g_assert_not_reached ();
4343                                 continue;
4344                         default:
4345                                 target = S390_RELATIVE(target, ip);
4346                                 ip += 2;
4347                                 s390_patch_rel (ip, (guint64) target);
4348                 }
4349         }
4350 }
4351
4352 /*========================= End of Function ========================*/
4353
4354 /*------------------------------------------------------------------*/
4355 /*                                                                  */
4356 /* Name         - emit_load_volatile_registers                      */
4357 /*                                                                  */
4358 /* Function     - Emit the instructions to reload parameter regist- */
4359 /*                registers for use with "tail" operations.         */
4360 /*                                                                  */
4361 /*                The register loading operations performed here    */
4362 /*                are the mirror of the store operations performed  */
4363 /*                in mono_arch_emit_prolog and need to be kept in   */
4364 /*                synchronization with it.                          */
4365 /*                                                                  */
4366 /*------------------------------------------------------------------*/
4367
4368 guint8 *
4369 emit_load_volatile_registers (guint8 *code, MonoCompile *cfg)
4370 {
4371         MonoInst *inst;
4372         MonoMethod *method = cfg->method;
4373         MonoMethodSignature *sig = mono_method_signature(method);
4374         int pos = 0, i;
4375         CallInfo *cinfo;
4376         size_data sz;
4377
4378         cinfo = calculate_sizes (sig, &sz, sig->pinvoke);
4379
4380         if (cinfo->struct_ret) {
4381                 ArgInfo *ainfo = &cinfo->ret;
4382                 inst         = cfg->ret;
4383                 s390_lg (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4384         }
4385
4386         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
4387                 ArgInfo *ainfo = cinfo->args + i;
4388                 inst = cfg->varinfo [pos];
4389
4390                 if (inst->opcode == OP_REGVAR) {
4391                         if (ainfo->regtype == RegTypeGeneral)
4392                                 s390_lgr (code, ainfo->reg, inst->dreg);
4393                         else if (ainfo->regtype == RegTypeFP) {
4394                                 if (inst->dreg != ainfo->reg) {
4395                                         if (ainfo->size == 4) {
4396                                                 s390_ldebr (code, ainfo->reg, inst->dreg);
4397                                         } else {
4398                                                 s390_ldr   (code, ainfo->reg, inst->dreg);
4399                                         }
4400                                 }
4401                         }
4402                         else if (ainfo->regtype == RegTypeBase) {
4403                         } else
4404                                 g_assert_not_reached ();
4405                 } else {
4406                         if (ainfo->regtype == RegTypeGeneral) {
4407                                 if (!((ainfo->reg >= 2) && (ainfo->reg <= 6)))
4408                                         g_assert_not_reached();
4409                                 switch (ainfo->size) {
4410                                 case 1:
4411                                         s390_icy  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4412                                         break;
4413                                 case 2:
4414                                         s390_lgh  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4415                                         break;
4416                                 case 4:
4417                                         s390_lgf (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4418                                         break;
4419                                 case 8:
4420                                         s390_lg  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4421                                         break;
4422                                 }
4423                         } else if (ainfo->regtype == RegTypeBase) {
4424                         } else if (ainfo->regtype == RegTypeFP) {
4425                                 if (ainfo->size == 8)
4426                                         s390_ld  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4427                                 else if (ainfo->size == 4)
4428                                         s390_le  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4429                                 else
4430                                         g_assert_not_reached ();
4431                         } else if (ainfo->regtype == RegTypeStructByVal) {
4432                                 if (ainfo->reg != STK_BASE) {
4433                                         switch (ainfo->size) {
4434                                         case 1:
4435                                                 s390_icy (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4436                                                 break;
4437                                         case 2:
4438                                                 s390_lgh (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4439                                                 break;
4440                                         case 4:
4441                                                 s390_lgf (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4442                                                 break;
4443                                         case 8:
4444                                                 s390_lg  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4445                                                 break;
4446                                         }
4447                                 }
4448                         } else if (ainfo->regtype == RegTypeStructByAddr) {
4449                                 if (ainfo->reg != STK_BASE) {
4450                                         s390_lg (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4451                                 }
4452                         } else
4453                                 g_assert_not_reached ();
4454                 }
4455                 pos++;
4456         }
4457
4458         g_free (cinfo);
4459
4460         return code;
4461 }
4462
4463 /*========================= End of Function ========================*/
4464
4465 /*------------------------------------------------------------------*/
4466 /*                                                                  */
4467 /* Name         - mono_arch_emit_prolog                             */
4468 /*                                                                  */
4469 /* Function     - Create the instruction sequence for a function    */
4470 /*                prolog.                                           */
4471 /*                                                                  */
4472 /*------------------------------------------------------------------*/
4473
4474 guint8 *
4475 mono_arch_emit_prolog (MonoCompile *cfg)
4476 {
4477         MonoMethod *method = cfg->method;
4478         MonoBasicBlock *bb;
4479         MonoMethodSignature *sig;
4480         MonoInst *inst;
4481         int alloc_size, pos, max_offset, i;
4482         guint8 *code;
4483         CallInfo *cinfo;
4484         size_data sz;
4485         int tracing = 0;
4486         int lmfOffset;
4487
4488         cfg->code_size   = 512;
4489
4490         if (mono_jit_trace_calls != NULL && mono_trace_eval (method)) {
4491                 tracing         = 1;
4492                 cfg->code_size += 256;
4493         }
4494
4495         if (method->save_lmf)
4496                 cfg->code_size += 200;
4497
4498         cfg->native_code = code = g_malloc (cfg->code_size);
4499
4500         s390_stmg (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
4501
4502         if (cfg->flags & MONO_CFG_HAS_ALLOCA) {
4503                 cfg->used_int_regs |= 1 << 11;
4504         }
4505
4506         alloc_size = cfg->stack_offset;
4507
4508         cfg->stack_usage = alloc_size;
4509         s390_lgr  (code, s390_r11, STK_BASE);
4510         if (s390_is_uimm16 (alloc_size)) {
4511                 s390_aghi (code, STK_BASE, -alloc_size);
4512         } else {
4513                 int stackSize = alloc_size;
4514                 while (stackSize > 32767) {
4515                         s390_aghi (code, STK_BASE, -32767);
4516                         stackSize -= 32767;
4517                 }
4518                 s390_aghi (code, STK_BASE, -stackSize);
4519         }
4520         s390_stg  (code, s390_r11, 0, STK_BASE, 0);
4521
4522         if (cfg->frame_reg != STK_BASE)
4523                 s390_lgr (code, s390_r11, STK_BASE);
4524
4525         /* compute max_offset in order to use short forward jumps
4526          * we always do it on s390 because the immediate displacement
4527          * for jumps is too small
4528          */
4529         max_offset = 0;
4530         for (bb = cfg->bb_entry; bb; bb = bb->next_bb) {
4531                 MonoInst *ins = bb->code;
4532                 bb->max_offset = max_offset;
4533
4534                 if (cfg->prof_options & MONO_PROFILE_COVERAGE)
4535                         max_offset += 6;
4536
4537                 while (ins) {
4538                         max_offset += ((guint8 *)ins_spec [ins->opcode])[MONO_INST_LEN];
4539                         ins = ins->next;
4540                 }
4541         }
4542
4543         /* load arguments allocated to register from the stack */
4544         sig = mono_method_signature (method);
4545         pos = 0;
4546
4547         cinfo = calculate_sizes (sig, &sz, sig->pinvoke);
4548
4549         if (cinfo->struct_ret) {
4550                 ArgInfo *ainfo = &cinfo->ret;
4551                 inst         = cfg->ret;
4552                 inst->backend.size = ainfo->vtsize;
4553                 s390_stg (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4554         }
4555
4556         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
4557                 ArgInfo *ainfo = cinfo->args + i;
4558                 inst = cfg->varinfo [pos];
4559
4560                 if (inst->opcode == OP_REGVAR) {
4561                         if (ainfo->regtype == RegTypeGeneral)
4562                                 s390_lgr (code, inst->dreg, ainfo->reg);
4563                         else if (ainfo->regtype == RegTypeFP) {
4564                                 if (inst->dreg != ainfo->reg) {
4565                                         if (ainfo->size == 4) {
4566                                                 s390_ledbr (code, inst->dreg, ainfo->reg);
4567                                         } else {
4568                                                 s390_ldr   (code, inst->dreg, ainfo->reg);
4569                                         }
4570                                 }
4571                         }
4572                         else if (ainfo->regtype == RegTypeBase) {
4573                                 s390_lgr  (code, s390_r13, STK_BASE);
4574                                 s390_aghi (code, s390_r13, alloc_size);
4575                                 s390_lg   (code, inst->dreg, 0, s390_r13, ainfo->offset);
4576                         } else
4577                                 g_assert_not_reached ();
4578
4579                         if (cfg->verbose_level > 2)
4580                                 g_print ("Argument %d assigned to register %s\n",
4581                                          pos, mono_arch_regname (inst->dreg));
4582                 } else {
4583                         if (ainfo->regtype == RegTypeGeneral) {
4584                                 if (!((ainfo->reg >= 2) && (ainfo->reg <= 6)))
4585                                         g_assert_not_reached();
4586                                 switch (ainfo->size) {
4587                                 case 1:
4588                                         s390_stc (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4589                                         break;
4590                                 case 2:
4591                                         s390_sth (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4592                                         break;
4593                                 case 4:
4594                                         s390_st (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4595                                         break;
4596                                 case 8:
4597                                         s390_stg (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4598                                         break;
4599                                 }
4600                         } else if (ainfo->regtype == RegTypeBase) {
4601                         } else if (ainfo->regtype == RegTypeFP) {
4602                                 if (ainfo->size == 8)
4603                                         s390_std (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4604                                 else if (ainfo->size == 4)
4605                                         s390_ste (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4606                                 else
4607                                         g_assert_not_reached ();
4608                         } else if (ainfo->regtype == RegTypeStructByVal) {
4609                                 int doffset = inst->inst_offset;
4610                                 int reg;
4611                                 if (ainfo->reg != STK_BASE)
4612                                         reg = ainfo->reg;
4613                                 else {
4614                                         reg = s390_r0;
4615                                         s390_lgr  (code, s390_r13, STK_BASE);
4616                                         s390_aghi (code, s390_r13, alloc_size);
4617                                 }
4618                                 switch (ainfo->size) {
4619                                         case 1:
4620                                                 if (ainfo->reg == STK_BASE)
4621                                                         s390_ic (code, reg, 0, s390_r13, ainfo->offset+7);
4622                                                 s390_stc (code, reg, 0, inst->inst_basereg, doffset);
4623                                                 break;
4624                                         case 2:
4625                                                 if (ainfo->reg == STK_BASE)
4626                                                         s390_lh (code, reg, 0, s390_r13, ainfo->offset+6);
4627                                                 s390_sth (code, reg, 0, inst->inst_basereg, doffset);
4628                                                 break;
4629                                         case 4:
4630                                                 if (ainfo->reg == STK_BASE)
4631                                                         s390_l  (code, reg, 0, s390_r13, ainfo->offset+4);
4632                                                 s390_st (code, reg, 0, inst->inst_basereg, doffset);
4633                                                 break;
4634                                         case 8:
4635                                                 if (ainfo->reg == STK_BASE)
4636                                                         s390_lg  (code, reg, 0, s390_r13, ainfo->offset);
4637                                                 s390_stg (code, reg, 0, inst->inst_basereg, doffset);
4638                                                 break;
4639                                 }
4640                         } else if (ainfo->regtype == RegTypeStructByAddr) {
4641                                 s390_stg (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4642                         } else
4643                                 g_assert_not_reached ();
4644                 }
4645                 pos++;
4646         }
4647
4648         if (method->save_lmf) {
4649                 /*---------------------------------------------------------------*/
4650                 /* we build the MonoLMF structure on the stack - see mini-s390.h */
4651                 /*---------------------------------------------------------------*/
4652                 lmfOffset = alloc_size - sizeof(MonoLMF);
4653
4654                 s390_lgr   (code, s390_r13, cfg->frame_reg);
4655                 s390_aghi  (code, s390_r13, lmfOffset);
4656
4657                 /*---------------------------------------------------------------*/
4658                 /* Preserve the parameter registers while we fix up the lmf      */
4659                 /*---------------------------------------------------------------*/
4660                 s390_stmg  (code, s390_r2, s390_r6, s390_r13,
4661                             G_STRUCT_OFFSET(MonoLMF, pregs[0]));
4662
4663                 /*---------------------------------------------------------------*/
4664                 /* On return from this call r2 have the address of the &lmf      */
4665                 /*---------------------------------------------------------------*/
4666                 s390_basr(code, s390_r10, 0);
4667                 s390_j   (code, 6);
4668                 mono_add_patch_info (cfg, code - cfg->native_code,
4669                                      MONO_PATCH_INFO_INTERNAL_METHOD,
4670                                      (gpointer)"mono_get_lmf_addr");
4671                 s390_llong(code, 0);
4672                 s390_lg   (code, s390_r1, 0, s390_r10, 4);
4673                 s390_basr (code, s390_r14, s390_r1);
4674
4675                 /*---------------------------------------------------------------*/
4676                 /* Set lmf.lmf_addr = jit_tls->lmf                               */
4677                 /*---------------------------------------------------------------*/
4678                 s390_stg   (code, s390_r2, 0, s390_r13,
4679                             G_STRUCT_OFFSET(MonoLMF, lmf_addr));
4680
4681                 /*---------------------------------------------------------------*/
4682                 /* Get current lmf                                               */
4683                 /*---------------------------------------------------------------*/
4684                 s390_lg    (code, s390_r0, 0, s390_r2, 0);
4685
4686                 /*---------------------------------------------------------------*/
4687                 /* Set our lmf as the current lmf                                */
4688                 /*---------------------------------------------------------------*/
4689                 s390_stg   (code, s390_r13, 0, s390_r2, 0);
4690
4691                 /*---------------------------------------------------------------*/
4692                 /* Have our lmf.previous_lmf point to the last lmf               */
4693                 /*---------------------------------------------------------------*/
4694                 s390_stg   (code, s390_r0, 0, s390_r13,
4695                             G_STRUCT_OFFSET(MonoLMF, previous_lmf));
4696
4697                 /*---------------------------------------------------------------*/
4698                 /* save method info                                              */
4699                 /*---------------------------------------------------------------*/
4700                 s390_basr  (code, s390_r1, 0);
4701                 s390_j     (code, 6);
4702                 s390_llong (code, method);
4703                 s390_lg    (code, s390_r1, 0, s390_r1, 4);
4704                 s390_stg   (code, s390_r1, 0, s390_r13,
4705                             G_STRUCT_OFFSET(MonoLMF, method));
4706
4707                 /*---------------------------------------------------------------*/
4708                 /* save the current IP                                           */
4709                 /*---------------------------------------------------------------*/
4710                 s390_stg   (code, STK_BASE, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, ebp));
4711                 s390_basr  (code, s390_r1, 0);
4712                 s390_stg   (code, s390_r1, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, eip));
4713
4714                 /*---------------------------------------------------------------*/
4715                 /* Save general and floating point registers                     */
4716                 /*---------------------------------------------------------------*/
4717                 s390_stmg  (code, s390_r2, s390_r12, s390_r13,
4718                             G_STRUCT_OFFSET(MonoLMF, gregs[2]));
4719                 for (i = 0; i < 16; i++) {
4720                         s390_std  (code, i, 0, s390_r13,
4721                                    G_STRUCT_OFFSET(MonoLMF, fregs[i]));
4722                 }
4723
4724                 /*---------------------------------------------------------------*/
4725                 /* Restore the parameter registers now that we've set up the lmf */
4726                 /*---------------------------------------------------------------*/
4727                 s390_lmg   (code, s390_r2, s390_r6, s390_r13,
4728                             G_STRUCT_OFFSET(MonoLMF, pregs[0]));
4729         }
4730
4731         if (tracing)
4732                 code = mono_arch_instrument_prolog(cfg, enter_method, code, TRUE);
4733
4734         cfg->code_len = code - cfg->native_code;
4735         g_assert (cfg->code_len < cfg->code_size);
4736
4737         g_free (cinfo);
4738
4739         return code;
4740 }
4741
4742 /*========================= End of Function ========================*/
4743
4744 /*------------------------------------------------------------------*/
4745 /*                                                                  */
4746 /* Name         - mono_arch_emit_epilog                             */
4747 /*                                                                  */
4748 /* Function     - Emit the instructions for a function epilog.      */
4749 /*                                                                  */
4750 /*------------------------------------------------------------------*/
4751
4752 void
4753 mono_arch_emit_epilog (MonoCompile *cfg)
4754 {
4755         MonoMethod *method = cfg->method;
4756         int tracing = 0;
4757         guint8 *code;
4758         int max_epilog_size = 96;
4759
4760         if (cfg->method->save_lmf)
4761                 max_epilog_size += 128;
4762
4763         if (mono_jit_trace_calls != NULL)
4764                 max_epilog_size += 128;
4765
4766         if (cfg->prof_options & MONO_PROFILE_ENTER_LEAVE)
4767                 max_epilog_size += 128;
4768
4769         while ((cfg->code_len + max_epilog_size) > (cfg->code_size - 16)) {
4770                 cfg->code_size  *= 2;
4771                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
4772                 mono_jit_stats.code_reallocs++;
4773         }
4774
4775         code = cfg->native_code + cfg->code_len;
4776
4777         if (mono_jit_trace_calls != NULL && mono_trace_eval (method)) {
4778                 code = mono_arch_instrument_epilog (cfg, leave_method, code, TRUE);
4779                 tracing = 1;
4780         }
4781
4782         if (method->save_lmf)
4783                 restoreLMF(code, cfg->frame_reg, cfg->stack_usage);
4784
4785         if (cfg->flags & MONO_CFG_HAS_ALLOCA)
4786                 s390_lg  (code, STK_BASE, 0, STK_BASE, 0);
4787         else
4788                 code = backUpStackPtr(cfg, code);
4789
4790         s390_lmg (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
4791         s390_br  (code, s390_r14);
4792
4793         cfg->code_len = code - cfg->native_code;
4794
4795         g_assert (cfg->code_len < cfg->code_size);
4796
4797 }
4798
4799 /*========================= End of Function ========================*/
4800
4801 /*------------------------------------------------------------------*/
4802 /*                                                                  */
4803 /* Name         - mono_arch_emit_exceptions                         */
4804 /*                                                                  */
4805 /* Function     - Emit the blocks to handle exception conditions.   */
4806 /*                                                                  */
4807 /*------------------------------------------------------------------*/
4808
4809 void
4810 mono_arch_emit_exceptions (MonoCompile *cfg)
4811 {
4812         MonoJumpInfo    *patch_info;
4813         guint8          *code;
4814         int             nThrows = 0,
4815                         exc_count = 0,
4816                         iExc;
4817         guint32         code_size;
4818         MonoClass       *exc_classes [MAX_EXC];
4819         guint8          *exc_throw_start [MAX_EXC],
4820                         *exc_throw_end [MAX_EXC];
4821
4822         for (patch_info = cfg->patch_info;
4823              patch_info;
4824              patch_info = patch_info->next) {
4825                 if (patch_info->type == MONO_PATCH_INFO_EXC)
4826                         exc_count++;
4827         }
4828
4829         code_size = exc_count * 48;
4830
4831         while ((cfg->code_len + code_size) > (cfg->code_size - 16)) {
4832                 cfg->code_size  *= 2;
4833                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
4834                 mono_jit_stats.code_reallocs++;
4835         }
4836
4837         code = cfg->native_code + cfg->code_len;
4838
4839         /*---------------------------------------------------------------------*/
4840         /* Add code to raise exceptions                                        */
4841         /*---------------------------------------------------------------------*/
4842         for (patch_info = cfg->patch_info; patch_info; patch_info = patch_info->next) {
4843                 switch (patch_info->type) {
4844                 case MONO_PATCH_INFO_EXC: {
4845                         guint8 *ip = patch_info->ip.i + cfg->native_code;
4846                         MonoClass *exc_class;
4847                         guint64 throw_ip;
4848
4849                         /*-----------------------------------------------------*/
4850                         /* Patch the branch in epilog to come here             */
4851                         /*-----------------------------------------------------*/
4852                         s390_patch_rel (ip + 2, (guint64) S390_RELATIVE(code,ip));
4853
4854                         exc_class = mono_class_from_name (mono_defaults.corlib,
4855                                                           "System",
4856                                                           patch_info->data.name);
4857                         g_assert (exc_class);
4858                         throw_ip = patch_info->ip.i;
4859
4860                         for (iExc = 0; iExc < nThrows; ++iExc)
4861                                 if (exc_classes [iExc] == exc_class)
4862                                         break;
4863
4864                         if (iExc < nThrows) {
4865                                 s390_jcl (code, S390_CC_UN,
4866                                           (guint64) exc_throw_start [iExc]);
4867                                 patch_info->type = MONO_PATCH_INFO_NONE;
4868                         } else {
4869
4870                                 if (nThrows < MAX_EXC) {
4871                                         exc_classes [nThrows]     = exc_class;
4872                                         exc_throw_start [nThrows] = code;
4873                                 }
4874
4875                                 /*---------------------------------------------*/
4876                                 /* Patch the parameter passed to the handler   */
4877                                 /*---------------------------------------------*/
4878                                 s390_basr (code, s390_r13, 0);
4879                                 s390_j    (code, 6);
4880                                 s390_llong(code, patch_info->data.target);
4881                                 /*---------------------------------------------*/
4882                                 /* Load return address & parameter register    */
4883                                 /*---------------------------------------------*/
4884                                 s390_larl (code, s390_r14, S390_RELATIVE((patch_info->ip.i +
4885                                                            cfg->native_code + 8), code));
4886                                 s390_lg   (code, s390_r2, 0, s390_r13, 4);
4887                                 /*---------------------------------------------*/
4888                                 /* Reuse the current patch to set the jump     */
4889                                 /*---------------------------------------------*/
4890                                 s390_basr (code, s390_r13, 0);
4891                                 s390_j    (code, 6);
4892                                 patch_info->type      = MONO_PATCH_INFO_INTERNAL_METHOD;
4893                                 patch_info->data.name = "mono_arch_throw_exception_by_name";
4894                                 patch_info->ip.i      = code - cfg->native_code;
4895                                 s390_llong(code, 0);
4896                                 s390_lg   (code, s390_r1, 0, s390_r13, 4);
4897                                 s390_br   (code, s390_r1);
4898                         }
4899                         break;
4900                 }
4901                 default:
4902                         /* do nothing */
4903                         break;
4904                 }
4905         }
4906
4907         cfg->code_len = code - cfg->native_code;
4908
4909         g_assert (cfg->code_len < cfg->code_size);
4910
4911 }
4912
4913 /*========================= End of Function ========================*/
4914
4915 /*------------------------------------------------------------------*/
4916 /*                                                                  */
4917 /* Name         - mono_arch_setup_jit_tls_data                      */
4918 /*                                                                  */
4919 /* Function     - Setup the JIT's Thread Level Specific Data.       */
4920 /*                                                                  */
4921 /*------------------------------------------------------------------*/
4922
4923 void
4924 mono_arch_setup_jit_tls_data (MonoJitTlsData *tls)
4925 {
4926         if (!tls_offset_inited) {
4927                 tls_offset_inited = TRUE;
4928
4929 #if HAVE_KW_THREAD
4930 # if 0
4931         __asm__ ("\tear\t%r1,0\n"
4932                  "\tlr\t%0,%3\n"
4933                  "\tsr\t%0,%r1\n"
4934                  "\tlr\t%1,%4\n"
4935                  "\tsr\t%1,%r1\n"
4936                  "\tlr\t%2,%5\n"
4937                  "\tsr\t%2,%r1\n"
4938                  : "=r" (appdomain_tls_offset),
4939                    "=r" (thread_tls_offset),
4940                    "=r" (lmf_tls_offset)
4941                  : "r" (&tls_appdomain),
4942                    "r" (&tls_current_object),
4943                    "r" (&mono_lmf_addr)
4944                  : "1", "cc");
4945 # endif
4946 #endif
4947         }
4948
4949         if (!lmf_addr_key_inited) {
4950                 lmf_addr_key_inited = TRUE;
4951                 pthread_key_create (&lmf_addr_key, NULL);
4952         }
4953         pthread_setspecific (lmf_addr_key, &tls->lmf);
4954
4955 }
4956
4957 /*========================= End of Function ========================*/
4958
4959 /*------------------------------------------------------------------*/
4960 /*                                                                  */
4961 /* Name         - mono_arch_free_jit_tls_data                       */
4962 /*                                                                  */
4963 /* Function     - Free tls data.                                    */
4964 /*                                                                  */
4965 /*------------------------------------------------------------------*/
4966
4967 void
4968 mono_arch_free_jit_tls_data (MonoJitTlsData *tls)
4969 {
4970
4971 }
4972
4973 /*========================= End of Function ========================*/
4974
4975 /*------------------------------------------------------------------*/
4976 /*                                                                  */
4977 /* Name         - mono_arch_emit_this_vret_args                     */
4978 /*                                                                  */
4979 /* Function     -                                                   */
4980 /*                                                                  */
4981 /*------------------------------------------------------------------*/
4982
4983 void
4984 mono_arch_emit_this_vret_args (MonoCompile *cfg, MonoCallInst *inst, int this_reg, int this_type, int vt_reg)
4985 {
4986         int this_dreg = s390_r2;
4987
4988         if (vt_reg != -1)
4989                 this_dreg = s390_r3;
4990
4991         /* add the this argument */
4992         if (this_reg != -1) {
4993                 MonoInst *this;
4994                 MONO_INST_NEW (cfg, this, OP_SETREG);
4995                 this->type  = this_type;
4996                 this->sreg1 = this_reg;
4997                 this->dreg  = mono_regstate_next_int (cfg->rs);
4998                 mono_bblock_add_inst (cfg->cbb, this);
4999                 mono_call_inst_add_outarg_reg (cfg, inst, this->dreg, this_dreg, FALSE);
5000         }
5001
5002         if (vt_reg != -1) {
5003                 MonoInst *vtarg;
5004                 MONO_INST_NEW (cfg, vtarg, OP_SETREG);
5005                 vtarg->type  = STACK_MP;
5006                 vtarg->sreg1 = vt_reg;
5007                 vtarg->dreg  = mono_regstate_next_int (cfg->rs);
5008                 mono_bblock_add_inst (cfg->cbb, vtarg);
5009                 mono_call_inst_add_outarg_reg (cfg, inst, vtarg->dreg, s390_r2, FALSE);
5010         }
5011 }
5012
5013 /*========================= End of Function ========================*/
5014
5015 /*------------------------------------------------------------------*/
5016 /*                                                                  */
5017 /* Name         - mono_arch_get_inst_for_method                   */
5018 /*                                                                  */
5019 /* Function     - Check for opcodes we can handle directly in       */
5020 /*                hardware.                                         */
5021 /*                                                                  */
5022 /*------------------------------------------------------------------*/
5023
5024 MonoInst*
5025 mono_arch_get_inst_for_method (MonoCompile *cfg, MonoMethod *cmethod,
5026                                MonoMethodSignature *fsig, MonoInst **args)
5027 {
5028         MonoInst *ins = NULL;
5029
5030         if (cmethod->klass == mono_defaults.math_class) {
5031                 if (strcmp (cmethod->name, "Sqrt") == 0) {
5032                         MONO_INST_NEW (cfg, ins, OP_SQRT);
5033                         ins->inst_i0 = args [0];
5034                 }
5035 //              if (strcmp (cmethod->name, "Abs") == 0) {
5036 //                      MONO_INST_NEW (cfg, ins, OP_ABS);
5037 //                      ins->inst_i0 = args [0];
5038 //              }
5039         } else if (cmethod->klass == mono_defaults.thread_class &&
5040                            strcmp (cmethod->name, "MemoryBarrier") == 0) {
5041                 MONO_INST_NEW (cfg, ins, OP_MEMORY_BARRIER);
5042         } else if(cmethod->klass->image == mono_defaults.corlib &&
5043                            (strcmp (cmethod->klass->name_space, "System.Threading") == 0) &&
5044                            (strcmp (cmethod->klass->name, "Interlocked") == 0)) {
5045
5046                 if (strcmp (cmethod->name, "Increment") == 0) {
5047                         MonoInst *ins_iconst;
5048                         guint32 opcode = 0;
5049
5050                         if (fsig->params [0]->type == MONO_TYPE_I4)
5051                                 opcode = OP_ATOMIC_ADD_NEW_I4;
5052                         else if (fsig->params [0]->type == MONO_TYPE_I8)
5053                                 opcode = OP_ATOMIC_ADD_NEW_I8;
5054                         else
5055                                 g_assert_not_reached ();
5056
5057                         MONO_INST_NEW (cfg, ins, opcode);
5058                         MONO_INST_NEW (cfg, ins_iconst, OP_ICONST);
5059                         ins_iconst->inst_c0 = 1;
5060
5061                         ins->inst_i0 = args [0];
5062                         ins->inst_i1 = ins_iconst;
5063                 } else if (strcmp (cmethod->name, "Decrement") == 0) {
5064                         MonoInst *ins_iconst;
5065                         guint32 opcode = 0;
5066
5067                         if (fsig->params [0]->type == MONO_TYPE_I4)
5068                                 opcode = OP_ATOMIC_ADD_NEW_I4;
5069                         else if (fsig->params [0]->type == MONO_TYPE_I8)
5070                                 opcode = OP_ATOMIC_ADD_NEW_I8;
5071                         else
5072                                 g_assert_not_reached ();
5073                         MONO_INST_NEW (cfg, ins, opcode);
5074                         MONO_INST_NEW (cfg, ins_iconst, OP_ICONST);
5075                         ins_iconst->inst_c0 = -1;
5076
5077                         ins->inst_i0 = args [0];
5078                         ins->inst_i1 = ins_iconst;
5079                         /* FIXME: */
5080                 } else if (strcmp (cmethod->name, "Exchange") == 0) {
5081                         guint32 opcode = 0;
5082
5083                         if (fsig->params [0]->type == MONO_TYPE_I4)
5084                                 opcode = OP_ATOMIC_EXCHANGE_I4;
5085                         else if ((fsig->params [0]->type == MONO_TYPE_I8) ||
5086                                          (fsig->params [0]->type == MONO_TYPE_I) ||
5087                                          (fsig->params [0]->type == MONO_TYPE_OBJECT))
5088                                 opcode = OP_ATOMIC_EXCHANGE_I8;
5089                         else
5090                                 return NULL;
5091
5092                         MONO_INST_NEW (cfg, ins, opcode);
5093
5094                         ins->inst_i0 = args [0];
5095                         ins->inst_i1 = args [1];
5096                 } else if (strcmp (cmethod->name, "Add") == 0) {
5097                         guint32 opcode = 0;
5098
5099                         if (fsig->params [0]->type == MONO_TYPE_I4)
5100                                 opcode = OP_ATOMIC_ADD_I4;
5101                         else if (fsig->params [0]->type == MONO_TYPE_I8)
5102                                 opcode = OP_ATOMIC_ADD_I8;
5103                         else
5104                                 g_assert_not_reached ();
5105
5106                         MONO_INST_NEW (cfg, ins, opcode);
5107
5108                         ins->inst_i0 = args [0];
5109                         ins->inst_i1 = args [1];
5110                 } else if ((strcmp (cmethod->name, "Read") == 0 &&
5111                            (fsig->params [0]->type == MONO_TYPE_I8))) {
5112                         MONO_INST_NEW (cfg, ins, CEE_LDIND_I8);
5113                         ins->inst_i0 = args [0];
5114                 }
5115         }
5116         return ins;
5117 }
5118
5119 /*========================= End of Function ========================*/
5120
5121 /*------------------------------------------------------------------*/
5122 /*                                                                  */
5123 /* Name         - mono_arch_print_tree                              */
5124 /*                                                                  */
5125 /* Function     - Print platform-specific opcode details.           */
5126 /*                                                                  */
5127 /* Returns      - 1 - opcode details have been printed              */
5128 /*                0 - opcode details have not been printed          */
5129 /*                                                                  */
5130 /*------------------------------------------------------------------*/
5131
5132 gboolean
5133 mono_arch_print_tree (MonoInst *tree, int arity)
5134 {
5135         gboolean done;
5136
5137         switch (tree->opcode) {
5138                 case OP_S390_LOADARG:
5139                 case OP_S390_ARGREG:
5140                 case OP_S390_ARGPTR:
5141                         printf ("[0x%lx(%s)]", tree->inst_offset,
5142                                 mono_arch_regname (tree->inst_basereg));
5143                         done = 1;
5144                         break;
5145                 case OP_S390_STKARG:
5146                         printf ("[0x%lx(previous_frame)]",
5147                                 tree->inst_offset);
5148                         done = 1;
5149                         break;
5150                 case OP_S390_MOVE:
5151                         printf ("[0x%lx(%d,%s),0x%lx(%s)]",
5152                                 tree->inst_offset, tree->backend.size,
5153                                 mono_arch_regname(tree->dreg),
5154                                 tree->inst_imm,
5155                                 mono_arch_regname(tree->sreg1));
5156                         done = 1;
5157                         break;
5158                 case OP_S390_SETF4RET:
5159                         printf ("[f%s,f%s]",
5160                                 mono_arch_regname (tree->dreg),
5161                                 mono_arch_regname (tree->sreg1));
5162                         done = 1;
5163                         break;
5164                 case OP_TLS_GET:
5165                         printf ("[0x%lx(0x%lx,%s)]", tree->inst_offset,
5166                                 tree->inst_imm,
5167                                 mono_arch_regname (tree->sreg1));
5168                         done = 1;
5169                         break;
5170                 case OP_S390_BKCHAIN:
5171                         printf ("[previous_frame(%s)]",
5172                                 mono_arch_regname (tree->sreg1));
5173                         done = 1;
5174                 default:
5175                         done = 0;
5176         }
5177         return (done);
5178 }
5179
5180 /*========================= End of Function ========================*/
5181
5182 /*------------------------------------------------------------------*/
5183 /*                                                                  */
5184 /* Name         - mono_arch_regalloc_cost                           */
5185 /*                                                                  */
5186 /* Function     - Determine the cost, in the number of memory       */
5187 /*                references, of the action of allocating the var-  */
5188 /*                iable VMV into a register during global register  */
5189 /*                allocation.                                       */
5190 /*                                                                  */
5191 /* Returns      - Cost                                              */
5192 /*                                                                  */
5193 /*------------------------------------------------------------------*/
5194
5195 guint32
5196 mono_arch_regalloc_cost (MonoCompile *cfg, MonoMethodVar *vmv)
5197 {
5198         /* FIXME: */
5199         return 2;
5200 }
5201
5202 /*========================= End of Function ========================*/
5203
5204 /*------------------------------------------------------------------*/
5205 /*                                                                  */
5206 /* Name         - mono_arch_get_domain_intrinsic                    */
5207 /*                                                                  */
5208 /* Function     -                                                   */
5209 /*                                                                  */
5210 /* Returns      -                                                   */
5211 /*                                                                  */
5212 /*------------------------------------------------------------------*/
5213
5214 MonoInst *
5215 mono_arch_get_domain_intrinsic (MonoCompile* cfg)
5216 {
5217         MonoInst *ins;
5218
5219         if (appdomain_tls_offset == -1)
5220                 return NULL;
5221
5222         MONO_INST_NEW (cfg, ins, OP_TLS_GET);
5223         ins->inst_offset = appdomain_tls_offset;
5224         return (ins);
5225 }
5226
5227 /*========================= End of Function ========================*/
5228
5229 /*------------------------------------------------------------------*/
5230 /*                                                                  */
5231 /* Name         - mono_arch_get_thread_intrinsic                    */
5232 /*                                                                  */
5233 /* Function     -                                                   */
5234 /*                                                                  */
5235 /* Returns      -                                                   */
5236 /*                                                                  */
5237 /*------------------------------------------------------------------*/
5238
5239 MonoInst *
5240 mono_arch_get_thread_intrinsic (MonoCompile* cfg)
5241 {
5242         MonoInst *ins;
5243
5244         if (thread_tls_offset == -1)
5245                 return NULL;
5246
5247         MONO_INST_NEW (cfg, ins, OP_TLS_GET);
5248         ins->inst_offset = thread_tls_offset;
5249         return (ins);
5250 }
5251
5252 /*========================= End of Function ========================*/
5253
5254 /*------------------------------------------------------------------*/
5255 /*                                                                  */
5256 /* Name         - mono_arch_flush_register_windows                  */
5257 /*                                                                  */
5258 /* Function     -                                                   */
5259 /*                                                                  */
5260 /* Returns      -                                                   */
5261 /*                                                                  */
5262 /*------------------------------------------------------------------*/
5263
5264 void
5265 mono_arch_flush_register_windows (void)
5266 {
5267 }
5268
5269 /*========================= End of Function ========================*/
5270
5271 /*------------------------------------------------------------------*/
5272 /*                                                                  */
5273 /* Name         - mono_arch_get_lmf_addr                            */
5274 /*                                                                  */
5275 /* Function     -                                                   */
5276 /*                                                                  */
5277 /* Returns      -                                                   */
5278 /*                                                                  */
5279 /*------------------------------------------------------------------*/
5280
5281 gpointer
5282 mono_arch_get_lmf_addr (void)
5283 {
5284         return pthread_getspecific (lmf_addr_key);
5285 }
5286
5287 /*========================= End of Function ========================*/
5288
5289 /*------------------------------------------------------------------*/
5290 /*                                                                  */
5291 /* Name         - mono_arch_is_inst_imm                             */
5292 /*                                                                  */
5293 /* Function     - Determine if operand qualifies as an immediate    */
5294 /*                value. For s390 this is a value -32768-32768      */
5295 /*                                                                  */
5296 /* Returns      - True|False - is [not] immediate value.            */
5297 /*                                                                  */
5298 /*------------------------------------------------------------------*/
5299
5300 gboolean
5301 mono_arch_is_inst_imm (gint64 imm)
5302 {
5303         return s390_is_imm16 (imm);
5304 }
5305
5306 /*========================= End of Function ========================*/
5307
5308 /*------------------------------------------------------------------*/
5309 /*                                                                  */
5310 /* Name         - opcode_to_cond                                    */
5311 /*                                                                  */
5312 /* Function     - Simplify the branch on condition opcode from      */
5313 /*                more than 20 to just a handful for easy manipu-   */
5314 /*                lation within the instruction emitting code.      */
5315 /*                                                                  */
5316 /* Returns      - CMP_xxx - this simplified condition type.         */
5317 /*                                                                  */
5318 /*------------------------------------------------------------------*/
5319
5320 static CompRelation
5321 opcode_to_cond (int opcode)
5322 {
5323         switch (opcode) {
5324         case CEE_BEQ:
5325         case OP_CEQ:
5326         case OP_IBEQ:
5327         case OP_ICEQ:
5328         case OP_FBEQ:
5329         case OP_FCEQ:
5330         case OP_COND_EXC_EQ:
5331                 return CMP_EQ;
5332         case CEE_BNE_UN:
5333         case OP_COND_EXC_NE_UN:
5334         case OP_IBNE_UN:
5335         case OP_FBNE_UN:
5336                 return CMP_NE;
5337         case CEE_BLE:
5338         case OP_IBLE:
5339         case OP_FBLE:
5340                 return CMP_LE;
5341         case CEE_BGE:
5342         case OP_IBGE:
5343         case OP_FBGE:
5344                 return CMP_GE;
5345         case CEE_BLT:
5346         case OP_COND_EXC_LT:
5347         case OP_CLT:
5348         case OP_IBLT:
5349         case OP_ICLT:
5350         case OP_FBLT:
5351         case OP_FCLT:
5352                 return CMP_LT;
5353         case CEE_BGT:
5354         case OP_COND_EXC_GT:
5355         case OP_CGT:
5356         case OP_IBGT:
5357         case OP_ICGT:
5358         case OP_FBGT:
5359         case OP_FCGT:
5360                 return CMP_GT;
5361
5362         case CEE_BLE_UN:
5363         case OP_COND_EXC_LE_UN:
5364         case OP_IBLE_UN:
5365         case OP_FBLE_UN:
5366                 return CMP_LE_UN;
5367         case CEE_BGE_UN:
5368         case OP_IBGE_UN:
5369         case OP_FBGE_UN:
5370                 return CMP_GE_UN;
5371         case CEE_BLT_UN:
5372         case OP_CLT_UN:
5373         case OP_IBLT_UN:
5374         case OP_ICLT_UN:
5375         case OP_FBLT_UN:
5376         case OP_FCLT_UN:
5377         case OP_COND_EXC_LT_UN:
5378                 return CMP_LT_UN;
5379         case CEE_BGT_UN:
5380         case OP_COND_EXC_GT_UN:
5381         case OP_CGT_UN:
5382         case OP_IBGT_UN:
5383         case OP_ICGT_UN:
5384         case OP_FCGT_UN:
5385         case OP_FBGT_UN:
5386                 return CMP_GT_UN;
5387         default:
5388                 printf ("%s\n", mono_inst_name (opcode));
5389                 g_error("Not implemented\n");
5390         }
5391         return CMP_EQ;
5392 }
5393
5394 /*========================= End of Function ========================*/
5395
5396 /*------------------------------------------------------------------*/
5397 /*                                                                  */
5398 /* Name         - mono_arch_get_patch_offset                        */
5399 /*                                                                  */
5400 /* Function     - Dummy entry point until s390x supports aot.       */
5401 /*                                                                  */
5402 /* Returns      - Offset for patch.                                 */
5403 /*                                                                  */
5404 /*------------------------------------------------------------------*/
5405
5406 guint32
5407 mono_arch_get_patch_offset (guint8 *code)
5408 {
5409         return 0;
5410 }
5411
5412 /*========================= End of Function ========================*/