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 gboolean tls_offset_inited = FALSE;
 316
 317 static int appdomain_tls_offset = -1,
 318            lmf_tls_offset = -1,
 319            thread_tls_offset = -1;
 320
 321 pthread_key_t lmf_addr_key;
 322
 323 gboolean lmf_addr_key_inited = FALSE;
 324
 325 #if 0
 326
 327 extern __thread MonoDomain *tls_appdomain;
 328 extern __thread MonoThread *tls_current_object;
 329 extern __thread gpointer   mono_lmf_addr;
 330
 331 #endif
 332
 333 /*====================== End of Global Variables ===================*/
 334
 335 /*------------------------------------------------------------------*/
 336 /*                                                                  */
 337 /* Name         - mono_arch_regname                                 */
 338 /*                                                                  */
 339 /* Function     - Returns the name of the register specified by     */
 340 /*                the input parameter.                              */
 341 /*                                                                  */
 342 /*------------------------------------------------------------------*/
 343
 344 const char*
 345 mono_arch_regname (int reg) {
 346         static const char * rnames[] = {
 347                 "s390_r0", "s390_sp", "s390_r2", "s390_r3", "s390_r4",
 348                 "s390_r5", "s390_r6", "s390_r7", "s390_r8", "s390_r9",
 349                 "s390_r10", "s390_r11", "s390_r12", "s390_r13", "s390_r14",
 350                 "s390_r15"
 351         };
 352
 353         if (reg >= 0 && reg < 16)
 354                 return rnames [reg];
 355         else
 356                 return "unknown";
 357 }
 358
 359 /*========================= End of Function ========================*/
 360
 361 /*------------------------------------------------------------------*/
 362 /*                                                                  */
 363 /* Name         - mono_arch_fregname                                */
 364 /*                                                                  */
 365 /* Function     - Returns the name of the register specified by     */
 366 /*                the input parameter.                              */
 367 /*                                                                  */
 368 /*------------------------------------------------------------------*/
 369
 370 const char*
 371 mono_arch_fregname (int reg) {
 372         static const char * rnames[] = {
 373                 "s390_f0", "s390_f1", "s390_f2", "s390_f3", "s390_f4",
 374                 "s390_f5", "s390_f6", "s390_f7", "s390_f8", "s390_f9",
 375                 "s390_f10", "s390_f11", "s390_f12", "s390_f13", "s390_f14",
 376                 "s390_f15"
 377         };
 378
 379         if (reg >= 0 && reg < 16)
 380                 return rnames [reg];
 381         else
 382                 return "unknown";
 383 }
 384
 385 /*========================= End of Function ========================*/
 386
 387 /*------------------------------------------------------------------*/
 388 /*                                                                  */
 389 /* Name         - arch_get_argument_info                            */
 390 /*                                                                  */
 391 /* Function     - Gathers information on parameters such as size,   */
 392 /*                alignment, and padding. arg_info should be large  */
 393 /*                enough to hold param_count + 1 entries.           */
 394 /*                                                                  */
 395 /* Parameters   - @csig - Method signature                          */
 396 /*                @param_count - No. of parameters to consider      */
 397 /*                @arg_info - An array to store the result info     */
 398 /*                                                                  */
 399 /* Returns      - Size of the activation frame                      */
 400 /*                                                                  */
 401 /*------------------------------------------------------------------*/
 402
 403 int
 404 mono_arch_get_argument_info (MonoMethodSignature *csig,
 405                              int param_count,
 406                              MonoJitArgumentInfo *arg_info)
 407 {
 408         int k, frame_size = 0;
 409         int size, align, pad;
 410         int offset = 8;
 411
 412         if (MONO_TYPE_ISSTRUCT (csig->ret)) {
 413                 frame_size += sizeof (gpointer);
 414                 offset += 8;
 415         }
 416
 417         arg_info [0].offset = offset;
 418
 419         if (csig->hasthis) {
 420                 frame_size += sizeof (gpointer);
 421                 offset += 8;
 422         }
 423
 424         arg_info [0].size = frame_size;
 425
 426         for (k = 0; k < param_count; k++) {
 427
 428                 if (csig->pinvoke)
 429                         size = mono_type_native_stack_size (csig->params [k], &align);
 430                 else
 431                         size = mono_type_stack_size (csig->params [k], &align);
 432
 433                 frame_size += pad = (align - (frame_size & (align - 1))) & (align - 1);
 434                 arg_info [k].pad = pad;
 435                 frame_size += size;
 436                 arg_info [k + 1].pad = 0;
 437                 arg_info [k + 1].size = size;
 438                 offset += pad;
 439                 arg_info [k + 1].offset = offset;
 440                 offset += size;
 441         }
 442
 443         align = MONO_ARCH_FRAME_ALIGNMENT;
 444         frame_size += pad = (align - (frame_size & (align - 1))) & (align - 1);
 445         arg_info [k].pad = pad;
 446
 447         return frame_size;
 448 }
 449
 450 /*========================= End of Function ========================*/
 451
 452 /*------------------------------------------------------------------*/
 453 /*                                                                  */
 454 /* Name         - retFitsInReg.                                     */
 455 /*                                                                  */
 456 /* Function     - Determines if a value can be returned in one or   */
 457 /*                two registers.                                    */
 458 /*                                                                  */
 459 /*------------------------------------------------------------------*/
 460
 461 static inline gboolean
 462 retFitsInReg(guint32 size)
 463 {
 464         switch (size) {
 465                 case 0:
 466                 case 1:
 467                 case 2:
 468                 case 4:
 469                 case 8:
 470                         return (TRUE);
 471                 break;
 472                 default:
 473                         return (FALSE);
 474         }
 475 }
 476
 477 /*========================= End of Function ========================*/
 478
 479 /*------------------------------------------------------------------*/
 480 /*                                                                  */
 481 /* Name         - backStackPtr.                                     */
 482 /*                                                                  */
 483 /* Function     - Restore Stack Pointer to previous frame.          */
 484 /*                                                                  */
 485 /*------------------------------------------------------------------*/
 486
 487 static inline guint8 *
 488 backUpStackPtr(MonoCompile *cfg, guint8 *code)
 489 {
 490         int stackSize = cfg->stack_usage;
 491
 492         if (s390_is_uimm16 (stackSize)) {
 493                 s390_aghi  (code, STK_BASE, stackSize);
 494         } else {
 495                 while (stackSize > 32767) {
 496                         s390_aghi  (code, STK_BASE, 32767);
 497                         stackSize -= 32767;
 498                 }
 499                 s390_aghi  (code, STK_BASE, stackSize);
 500         }
 501         return (code);
 502 }
 503
 504 /*========================= End of Function ========================*/
 505
 506 /*------------------------------------------------------------------*/
 507 /*                                                                  */
 508 /* Name         - indent                                            */
 509 /*                                                                  */
 510 /* Function     - Perform nice indenting to current level           */
 511 /*                                                                  */
 512 /*------------------------------------------------------------------*/
 513
 514 static void
 515 indent (int diff) {
 516         int v;
 517         if (diff < 0)
 518                 indent_level += diff;
 519         v = indent_level;
 520         printf("[%3d] ",v);
 521         while (v-- > 0) {
 522                 printf (". ");
 523         }
 524         if (diff > 0)
 525                 indent_level += diff;
 526 }
 527
 528 /*========================= End of Function ========================*/
 529
 530 /*------------------------------------------------------------------*/
 531 /*                                                                  */
 532 /* Name         - decodeParm                                        */
 533 /*                                                                  */
 534 /* Function     - Decode a parameter for the trace.                 */
 535 /*                                                                  */
 536 /*------------------------------------------------------------------*/
 537
 538 static void
 539 decodeParm(MonoType *type, void *curParm, int size)
 540 {
 541         guint32 simpleType;
 542
 543         if (type->byref) {
 544                 printf("[BYREF:%p], ", *((char **) curParm));
 545         } else {
 546                 simpleType = mono_type_get_underlying_type(type)->type;
 547 enum_parmtype:
 548                 switch (simpleType) {
 549                         case MONO_TYPE_I :
 550                                 printf ("[INTPTR:%p], ", *((int **) curParm));
 551                                 break;
 552                         case MONO_TYPE_U :
 553                                 printf ("[UINTPTR:%p], ", *((int **) curParm));
 554                                 break;
 555                         case MONO_TYPE_BOOLEAN :
 556                                 printf ("[BOOL:%ld], ", *((gint64 *) curParm));
 557                                 break;
 558                         case MONO_TYPE_CHAR :
 559                                 printf ("[CHAR:%c], ", *((int  *) curParm));
 560                                 break;
 561                         case MONO_TYPE_I1 :
 562                                 printf ("[INT1:%ld], ", *((gint64 *) curParm));
 563                                 break;
 564                         case MONO_TYPE_I2 :
 565                                 printf ("[INT2:%ld], ", *((gint64 *) curParm));
 566                                 break;
 567                         case MONO_TYPE_I4 :
 568                                 printf ("[INT4:%ld], ", *((gint64 *) curParm));
 569                                 break;
 570                         case MONO_TYPE_U1 :
 571                                 printf ("[UINT1:%lu], ", *((guint64 *) curParm));
 572                                 break;
 573                         case MONO_TYPE_U2 :
 574                                 printf ("[UINT2:%lu], ", *((guint64 *) curParm));
 575                                 break;
 576                         case MONO_TYPE_U4 :
 577                                 printf ("[UINT4:%lu], ", *((guint64 *) curParm));
 578                                 break;
 579                         case MONO_TYPE_U8 :
 580                                 printf ("[UINT8:%lu], ", *((guint64 *) curParm));
 581                                 break;
 582                         case MONO_TYPE_STRING : {
 583                                 MonoString *s = *((MonoString **) curParm);
 584                                 if (s) {
 585                                         g_assert (((MonoObject *) s)->vtable->klass == mono_defaults.string_class);
 586                                         printf("[STRING:%p:%s], ", s, mono_string_to_utf8(s));
 587                                 } else {
 588                                         printf("[STRING:null], ");
 589                                 }
 590                                 break;
 591                         }
 592                         case MONO_TYPE_CLASS :
 593                         case MONO_TYPE_OBJECT : {
 594                                 MonoObject *obj = *((MonoObject **) curParm);
 595                                 MonoClass *class;
 596                                 if ((obj) && (obj->vtable)) {
 597                                         printf("[CLASS/OBJ:");
 598                                         class = obj->vtable->klass;
 599                                         printf("%p [%p] ",obj,curParm);
 600                                         if (class == mono_defaults.string_class) {
 601                                                 printf("[STRING:%p:%s]",
 602                                                        obj, mono_string_to_utf8 ((MonoString *) obj));
 603                                         } else if (class == mono_defaults.int32_class) {
 604                                                 printf("[INT32:%p:%d]",
 605                                                         obj, *(gint32 *)((char *)obj + sizeof (MonoObject)));
 606                                         } else
 607                                                 printf("[%s.%s:%p]",
 608                                                        class->name_space, class->name, obj);
 609                                         printf("], ");
 610                                 } else {
 611                                         printf("[OBJECT:null], ");
 612                                 }
 613                                 break;
 614                         }
 615                         case MONO_TYPE_PTR :
 616                                 printf("[PTR:%p], ", *((gpointer **) (curParm)));
 617                                 break;
 618                         case MONO_TYPE_FNPTR :
 619                                 printf("[FNPTR:%p], ", *((gpointer **) (curParm)));
 620                                 break;
 621                         case MONO_TYPE_ARRAY :
 622                                 printf("[ARRAY:%p], ", *((gpointer **) (curParm)));
 623                                 break;
 624                         case MONO_TYPE_SZARRAY :
 625                                 printf("[SZARRAY:%p], ", *((gpointer **) (curParm)));
 626                                 break;
 627                         case MONO_TYPE_I8 :
 628                                 printf("[INT8:%ld], ", *((gint64 *) (curParm)));
 629                                 break;
 630                         case MONO_TYPE_R4 :
 631                                 printf("[FLOAT4:%g], ", *((float *) (curParm)));
 632                                 break;
 633                         case MONO_TYPE_R8 :
 634                                 printf("[FLOAT8:%g], ", *((double *) (curParm)));
 635                                 break;
 636                         case MONO_TYPE_VALUETYPE : {
 637                                 int i;
 638                                 MonoMarshalType *info;
 639
 640                                 if (type->data.klass->enumtype) {
 641                                         simpleType = type->data.klass->enum_basetype->type;
 642                                         printf("{VALUETYPE} - ");
 643                                         goto enum_parmtype;
 644                                 }
 645
 646                                 info = mono_marshal_load_type_info (type->data.klass);
 647
 648                                 if ((info->native_size == sizeof(float)) &&
 649                                     (info->num_fields  == 1) &&
 650                                     (info->fields[0].field->type->type == MONO_TYPE_R4)) {
 651                                                 printf("[FLOAT4:%f], ", *((float *) (curParm)));
 652                                         break;
 653                                 }
 654
 655                                 if ((info->native_size == sizeof(double)) &&
 656                                     (info->num_fields  == 1) &&
 657                                     (info->fields[0].field->type->type == MONO_TYPE_R8)) {
 658                                         printf("[FLOAT8:%g], ", *((double *) (curParm)));
 659                                         break;
 660                                 }
 661
 662                                 printf("[VALUETYPE:");
 663                                 for (i = 0; i < size; i++)
 664                                         printf("%02x,", *((guint8 *)curParm+i));
 665                                 printf("]");
 666                                 break;
 667                         }
 668                         case MONO_TYPE_TYPEDBYREF: {
 669                                 int i;
 670                                 printf("[TYPEDBYREF:");
 671                                 for (i = 0; i < size; i++)
 672                                         printf("%02x,", *((guint8 *)curParm+i));
 673                                 printf("]");
 674                                 break;
 675                         }
 676                         default :
 677                                 printf("[?? - %d], ",simpleType);
 678                 }
 679         }
 680 }
 681
 682 /*========================= End of Function ========================*/
 683
 684 /*------------------------------------------------------------------*/
 685 /*                                                                  */
 686 /* Name         - enter_method                                      */
 687 /*                                                                  */
 688 /* Function     - Perform tracing of the entry to the current       */
 689 /*                method.                                           */
 690 /*                                                                  */
 691 /*------------------------------------------------------------------*/
 692
 693 static void
 694 enter_method (MonoMethod *method, RegParm *rParm, char *sp)
 695 {
 696         int i, oParm = 0, iParm = 0;
 697         MonoClass *class;
 698         MonoObject *obj;
 699         MonoMethodSignature *sig;
 700         char *fname;
 701         guint64 ip;
 702         CallInfo *cinfo;
 703         ArgInfo *ainfo;
 704         size_data sz;
 705         void *curParm;
 706
 707         fname = mono_method_full_name (method, TRUE);
 708         indent (1);
 709         printf ("ENTER: %s ", fname);
 710         g_free (fname);
 711
 712         ip  = (*(guint64 *) (sp+S390_RET_ADDR_OFFSET));
 713         printf ("ip: %p sp: %p - ", (gpointer) ip, sp);
 714
 715         if (rParm == NULL)
 716                 return;
 717
 718         sig = mono_method_signature (method);
 719
 720         cinfo = calculate_sizes (sig, &sz, sig->pinvoke);
 721
 722         if (cinfo->struct_ret) {
 723                 printf ("[STRUCTRET:%p], ", (gpointer) rParm->gr[0]);
 724                 iParm = 1;
 725         }
 726
 727         if (sig->hasthis) {
 728                 gpointer *this = (gpointer *) rParm->gr[iParm];
 729                 obj = (MonoObject *) this;
 730                 if (method->klass->valuetype) {
 731                         if (obj) {
 732                                 printf("this:[value:%p:%016lx], ",
 733                                        this, *((guint64 *)(this+sizeof(MonoObject))));
 734                         } else
 735                                 printf ("this:[NULL], ");
 736                 } else {
 737                         if (obj) {
 738                                 class = obj->vtable->klass;
 739                                 if (class == mono_defaults.string_class) {
 740                                         printf ("this:[STRING:%p:%s], ",
 741                                                 obj, mono_string_to_utf8 ((MonoString *)obj));
 742                                 } else {
 743                                         printf ("this:%p[%s.%s], ",
 744                                                 obj, class->name_space, class->name);
 745                                 }
 746                         } else
 747                                 printf ("this:NULL, ");
 748                 }
 749                 oParm++;
 750         }
 751
 752         for (i = 0; i < sig->param_count; ++i) {
 753                 ainfo = &cinfo->args[i + oParm];
 754                 switch (ainfo->regtype) {
 755                         case RegTypeGeneral :
 756                                 decodeParm(sig->params[i], &(rParm->gr[ainfo->reg-2]), ainfo->size);
 757                                 break;
 758                         case RegTypeFP :
 759                                 decodeParm(sig->params[i], &(rParm->fp[ainfo->reg]), ainfo->size);
 760                                 break;
 761                         case RegTypeBase :
 762                                 decodeParm(sig->params[i], sp+ainfo->offset, ainfo->size);
 763                                 break;
 764                         case RegTypeStructByVal :
 765                                 if (ainfo->reg != STK_BASE) {
 766                                         int offset = sizeof(glong) - ainfo->size;
 767                                         curParm = &(rParm->gr[ainfo->reg-2])+offset;
 768                                 }
 769                                 else
 770                                         curParm = sp+ainfo->offset;
 771
 772                                 if (retFitsInReg (ainfo->vtsize))
 773                                         decodeParm(sig->params[i],
 774                                                    curParm,
 775                                                    ainfo->size);
 776                                 else
 777                                         decodeParm(sig->params[i],
 778                                                    *((char **) curParm),
 779                                                    ainfo->vtsize);
 780                                 break;
 781                         case RegTypeStructByAddr :
 782                                 if (ainfo->reg != STK_BASE)
 783                                         curParm = &(rParm->gr[ainfo->reg-2]);
 784                                 else
 785                                         curParm = sp+ainfo->offset;
 786
 787                                 decodeParm(sig->params[i],
 788                                            *((char **) curParm),
 789                                            ainfo->vtsize);
 790                                 break;
 791
 792                         default :
 793                                 printf("???, ");
 794                 }
 795         }
 796         printf("\n");
 797         g_free(cinfo);
 798 }
 799
 800 /*========================= End of Function ========================*/
 801
 802 /*------------------------------------------------------------------*/
 803 /*                                                                  */
 804 /* Name         - leave_method                                      */
 805 /*                                                                  */
 806 /* Function     -                                                   */
 807 /*                                                                  */
 808 /*------------------------------------------------------------------*/
 809
 810 static void
 811 leave_method (MonoMethod *method, ...)
 812 {
 813         MonoType *type;
 814         char *fname;
 815         guint64 ip;
 816         va_list ap;
 817
 818         va_start(ap, method);
 819
 820         fname = mono_method_full_name (method, TRUE);
 821         indent (-1);
 822         printf ("LEAVE: %s", fname);
 823         g_free (fname);
 824
 825         type = mono_method_signature (method)->ret;
 826
 827 handle_enum:
 828         switch (type->type) {
 829         case MONO_TYPE_VOID:
 830                 break;
 831         case MONO_TYPE_BOOLEAN: {
 832                 int val = va_arg (ap, int);
 833                 if (val)
 834                         printf ("[TRUE:%d]", val);
 835                 else
 836                         printf ("[FALSE]");
 837
 838                 break;
 839         }
 840         case MONO_TYPE_CHAR: {
 841                 int val = va_arg (ap, int);
 842                 printf ("[CHAR:%d]", val);
 843                 break;
 844         }
 845         case MONO_TYPE_I1: {
 846                 int val = va_arg (ap, int);
 847                 printf ("[INT1:%d]", val);
 848                 break;
 849         }
 850         case MONO_TYPE_U1: {
 851                 int val = va_arg (ap, int);
 852                 printf ("[UINT1:%d]", val);
 853                 break;
 854         }
 855         case MONO_TYPE_I2: {
 856                 int val = va_arg (ap, int);
 857                 printf ("[INT2:%d]", val);
 858                 break;
 859         }
 860         case MONO_TYPE_U2: {
 861                 int val = va_arg (ap, int);
 862                 printf ("[UINT2:%d]", val);
 863                 break;
 864         }
 865         case MONO_TYPE_I4: {
 866                 int val = va_arg (ap, int);
 867                 printf ("[INT4:%d]", val);
 868                 break;
 869         }
 870         case MONO_TYPE_U4: {
 871                 int val = va_arg (ap, int);
 872                 printf ("[UINT4:%d]", val);
 873                 break;
 874         }
 875         case MONO_TYPE_I: {
 876                 gint64 val = va_arg (ap, gint64);
 877                 printf ("[INT:%ld]", val);
 878                 printf("]");
 879                 break;
 880         }
 881         case MONO_TYPE_U: {
 882                 gint64 val = va_arg (ap, gint64);
 883                 printf ("[UINT:%lu]", val);
 884                 printf("]");
 885                 break;
 886         }
 887         case MONO_TYPE_STRING: {
 888                 MonoString *s = va_arg (ap, MonoString *);
 889 ;
 890                 if (s) {
 891                         g_assert (((MonoObject *)s)->vtable->klass == mono_defaults.string_class);
 892                         printf ("[STRING:%p:%s]", s, mono_string_to_utf8 (s));
 893                 } else
 894                         printf ("[STRING:null], ");
 895                 break;
 896         }
 897         case MONO_TYPE_CLASS:
 898         case MONO_TYPE_OBJECT: {
 899                 MonoObject *o = va_arg (ap, MonoObject *);
 900
 901                 if ((o) && (o->vtable)) {
 902                         if (o->vtable->klass == mono_defaults.boolean_class) {
 903                                 printf ("[BOOLEAN:%p:%d]", o, *((guint8 *)o + sizeof (MonoObject)));
 904                         } else if  (o->vtable->klass == mono_defaults.int32_class) {
 905                                 printf ("[INT32:%p:%d]", o, *((gint32 *)((char *)o + sizeof (MonoObject))));
 906                         } else if  (o->vtable->klass == mono_defaults.int64_class) {
 907                                 printf ("[INT64:%p:%ld]", o, *((gint64 *)((char *)o + sizeof (MonoObject))));
 908                         } else
 909                                 printf ("[%s.%s:%p]", o->vtable->klass->name_space, o->vtable->klass->name, o);
 910                 } else
 911                         printf ("[OBJECT:%p]", o);
 912
 913                 break;
 914         }
 915         case MONO_TYPE_PTR:
 916         case MONO_TYPE_FNPTR:
 917         case MONO_TYPE_ARRAY:
 918         case MONO_TYPE_SZARRAY: {
 919                 gpointer p = va_arg (ap, gpointer);
 920                 printf ("[result=%p]", p);
 921                 break;
 922         }
 923         case MONO_TYPE_I8: {
 924                 gint64 l =  va_arg (ap, gint64);
 925                 printf ("[LONG:%ld]", l);
 926                 break;
 927         }
 928         case MONO_TYPE_U8: {
 929                 guint64 l =  va_arg (ap, guint64);
 930                 printf ("[ULONG:%lu]", l);
 931                 break;
 932         }
 933         case MONO_TYPE_R4: {
 934                 double f = va_arg (ap, double);
 935                 printf ("[FLOAT4:%g]\n", f);
 936                 break;
 937         }
 938         case MONO_TYPE_R8: {
 939                 double f = va_arg (ap, double);
 940                 printf ("[FLOAT8:%g]\n", f);
 941                 break;
 942         }
 943         case MONO_TYPE_VALUETYPE: {
 944                 MonoMarshalType *info;
 945                 if (type->data.klass->enumtype) {
 946                         type = type->data.klass->enum_basetype;
 947                         goto handle_enum;
 948                 } else {
 949                         guint8 *p = va_arg (ap, gpointer);
 950                         int j, size, align;
 951
 952                         info = mono_marshal_load_type_info (type->data.klass);
 953
 954                         if ((info->native_size == sizeof(float)) &&
 955                             (info->num_fields  == 1) &&
 956                             (info->fields[0].field->type->type == MONO_TYPE_R4)) {
 957                                 double f = va_arg (ap, double);
 958                                 printf("[FLOAT4:%g]\n", (double) f);
 959                                 break;
 960                         }
 961
 962                         if ((info->native_size == sizeof(double)) &&
 963                             (info->num_fields  == 1) &&
 964                             (info->fields[0].field->type->type == MONO_TYPE_R8)) {
 965                                 double f = va_arg (ap, double);
 966                                 printf("[FLOAT8:%g]\n", f);
 967                                 break;
 968                         }
 969
 970                         size = mono_type_size (type, &align);
 971                         switch (size) {
 972                         case 1:
 973                         case 2:
 974                         case 4:
 975                         case 8:
 976                                 printf ("[");
 977                                 for (j = 0; p && j < size; j++)
 978                                         printf ("%02x,", p [j]);
 979                                 printf ("]\n");
 980                                 break;
 981                         default:
 982                                 printf ("[VALUETYPE]\n");
 983                         }
 984                 }
 985                 break;
 986         }
 987         case MONO_TYPE_TYPEDBYREF: {
 988                 guint8 *p = va_arg (ap, gpointer);
 989                 int j, size, align;
 990                 size = mono_type_size (type, &align);
 991                 switch (size) {
 992                 case 1:
 993                 case 2:
 994                 case 4:
 995                 case 8:
 996                         printf ("[");
 997                         for (j = 0; p && j < size; j++)
 998                                 printf ("%02x,", p [j]);
 999                         printf ("]\n");
1000                         break;
1001                 default:
1002                         printf ("[TYPEDBYREF]\n");
1003                 }
1004         }
1005                 break;
1006         default:
1007                 printf ("(unknown return type %x)",
1008                         mono_method_signature (method)->ret->type);
1009         }
1010
1011         ip = ((gint64) __builtin_return_address (0));
1012         printf (" ip: %p\n", (gpointer) ip);
1013 }
1014
1015 /*========================= End of Function ========================*/
1016
1017 /*------------------------------------------------------------------*/
1018 /*                                                                  */
1019 /* Name         - catch_SIGILL                                      */
1020 /*                                                                  */
1021 /* Function     - Catch SIGILL as a result of testing for long      */
1022 /*                displacement facility.                            */
1023 /*                                                                  */
1024 /*------------------------------------------------------------------*/
1025
1026 void
1027 catch_SIGILL(int sigNo, siginfo_t *info, void *act) {
1028
1029         has_ld = 0;
1030
1031 }
1032
1033 /*========================= End of Function ========================*/
1034
1035 /*------------------------------------------------------------------*/
1036 /*                                                                  */
1037 /* Name         - mono_arch_cpu_init                                */
1038 /*                                                                  */
1039 /* Function     - Perform CPU specific initialization to execute    */
1040 /*                managed code.                                     */
1041 /*                                                                  */
1042 /*------------------------------------------------------------------*/
1043
1044 void
1045 mono_arch_cpu_init (void)
1046 {
1047         struct sigaction sa,
1048                          *oldSa = NULL;
1049         guint mode = 1;
1050
1051         /*--------------------------------------*/
1052         /* Set default rounding mode for FP     */
1053         /*--------------------------------------*/
1054         __asm__ ("SRNM\t%0\n\t"
1055                 : : "m" (mode));
1056
1057         /*--------------------------------------*/
1058         /* Determine if we have long displace-  */
1059         /* ment facility on this processor      */
1060         /*--------------------------------------*/
1061         sa.sa_sigaction = catch_SIGILL;
1062         sigemptyset (&sa.sa_mask);
1063         sa.sa_flags = SA_SIGINFO;
1064
1065         sigaction (SIGILL, &sa, oldSa);
1066
1067         /*--------------------------------------*/
1068         /* We test by executing the STY inst    */
1069         /*--------------------------------------*/
1070         __asm__ ("LGHI\t0,1\n\t"
1071                  "LA\t1,%0\n\t"
1072                  ".byte\t0xe3,0x00,0x10,0x00,0x00,0x50\n\t"
1073                 : "=m" (has_ld) : : "0", "1");
1074
1075         sigaction (SIGILL, oldSa, NULL);
1076 }
1077
1078 /*========================= End of Function ========================*/
1079
1080 /*------------------------------------------------------------------*/
1081 /*                                                                  */
1082 /* Name         - mono_arch_cpu_optimizazions                       */
1083 /*                                                                  */
1084 /* Function     - Returns the optimizations supported on this CPU   */
1085 /*                                                                  */
1086 /*------------------------------------------------------------------*/
1087
1088 guint32
1089 mono_arch_cpu_optimizazions (guint32 *exclude_mask)
1090 {
1091         guint32 opts = 0;
1092
1093         /*----------------------------------------------------------*/
1094         /* No s390-specific optimizations yet                       */
1095         /*----------------------------------------------------------*/
1096         *exclude_mask = MONO_OPT_INLINE|MONO_OPT_LINEARS;
1097 //      *exclude_mask = MONO_OPT_INLINE;
1098         return opts;
1099 }
1100
1101 /*========================= End of Function ========================*/
1102
1103 /*------------------------------------------------------------------*/
1104 /*                                                                  */
1105 /* Name         -                                                   */
1106 /*                                                                  */
1107 /* Function     -                                                   */
1108 /*                                                                  */
1109 /*------------------------------------------------------------------*/
1110
1111 static gboolean
1112 is_regsize_var (MonoType *t) {
1113         if (t->byref)
1114                 return TRUE;
1115         switch (mono_type_get_underlying_type (t)->type) {
1116         case MONO_TYPE_I4:
1117         case MONO_TYPE_U4:
1118         case MONO_TYPE_I:
1119         case MONO_TYPE_I8:
1120         case MONO_TYPE_U8:
1121         case MONO_TYPE_U:
1122         case MONO_TYPE_PTR:
1123         case MONO_TYPE_FNPTR:
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                                 ins->opcode = (ins->opcode == OP_LOADI1_MEMBASE) ? CEE_CONV_I1 : CEE_CONV_U1;
2313                                 ins->sreg1 = last_ins->sreg1;
2314                         }
2315                         break;
2316                 case OP_LOADU2_MEMBASE:
2317                 case OP_LOADI2_MEMBASE:
2318                         if (last_ins && (last_ins->opcode == OP_STOREI2_MEMBASE_REG) &&
2319                                         ins->inst_basereg == last_ins->inst_destbasereg &&
2320                                         ins->inst_offset == last_ins->inst_offset) {
2321                                 ins->opcode = (ins->opcode == OP_LOADI2_MEMBASE) ? CEE_CONV_I2 : CEE_CONV_U2;
2322                                 ins->sreg1 = last_ins->sreg1;
2323                         }
2324                         break;
2325                 case CEE_CONV_I4:
2326                 case CEE_CONV_U4:
2327                 case OP_MOVE:
2328                         /*
2329                          * OP_MOVE reg, reg
2330                          */
2331                         if (ins->dreg == ins->sreg1) {
2332                                 if (last_ins)
2333                                         last_ins->next = ins->next;
2334                                 ins = ins->next;
2335                                 continue;
2336                         }
2337                         /*
2338                          * OP_MOVE sreg, dreg
2339                          * OP_MOVE dreg, sreg
2340                          */
2341                         if (last_ins && last_ins->opcode == OP_MOVE &&
2342                             ins->sreg1 == last_ins->dreg &&
2343                             ins->dreg == last_ins->sreg1) {
2344                                 last_ins->next = ins->next;
2345                                 ins = ins->next;
2346                                 continue;
2347                         }
2348                         break;
2349                 }
2350                 last_ins = ins;
2351                 ins = ins->next;
2352         }
2353         bb->last_ins = last_ins;
2354 }
2355
2356 /*========================= End of Function ========================*/
2357
2358 /*------------------------------------------------------------------*/
2359 /*                                                                  */
2360 /* Name         - mono_arch_local_regalloc.                         */
2361 /*                                                                  */
2362 /* Function     - We first scan the list of instructions and we     */
2363 /*                save the liveness information of each register    */
2364 /*                (when the register is first used, when its value  */
2365 /*                is set etc.). We also reverse the list of instr-  */
2366 /*                uctions (in the InstList list) because assigning  */
2367 /*                registers backwards allows for more tricks to be  */
2368 /*                used.                                             */
2369 /*                                                                  */
2370 /*------------------------------------------------------------------*/
2371
2372 void
2373 mono_arch_local_regalloc (MonoCompile *cfg, MonoBasicBlock *bb)
2374 {
2375         mono_local_regalloc(cfg, bb);
2376 }
2377
2378 /*========================= End of Function ========================*/
2379
2380 /*------------------------------------------------------------------*/
2381 /*                                                                  */
2382 /* Name         - emit_float_to_int                                 */
2383 /*                                                                  */
2384 /* Function     - Create instructions which will convert a floating */
2385 /*                point value to integer.                           */
2386 /*                                                                  */
2387 /*------------------------------------------------------------------*/
2388
2389 static guchar*
2390 emit_float_to_int (MonoCompile *cfg, guchar *code, int dreg, int sreg, int size, gboolean is_signed)
2391 {
2392         /* sreg is a float, dreg is an integer reg. */
2393         if (is_signed) {
2394                 s390_cfdbr (code, dreg, 5, sreg);
2395                 switch (size) {
2396                         case 1:
2397                                 s390_lghi (code, s390_r0, 0);
2398                                 s390_lghi (code, s390_r13, 0xff);
2399                                 s390_ltgr (code, dreg, dreg);
2400                                 s390_jnl  (code, 4);
2401                                 s390_lghi (code, s390_r0, 0x80);
2402                                 s390_ngr  (code, dreg, s390_r13);
2403                                 s390_ogr  (code, dreg, s390_r0);
2404                                 break;
2405                 }
2406         } else {
2407                 short *o[1];
2408                 s390_basr   (code, s390_r13, 0);
2409                 s390_j      (code, 10);
2410                 s390_llong  (code, 0x41e0000000000000);
2411                 s390_llong  (code, 0x41f0000000000000);
2412                 s390_ldr    (code, s390_f15, sreg);
2413                 s390_cdb    (code, s390_f15, 0, s390_r13, 4);
2414                 s390_jl     (code, 0); CODEPTR (code, o[0]);
2415                 s390_sdb    (code, s390_f15, 0, s390_r13, 12);
2416                 s390_cfdbr  (code, dreg, 7, s390_f15);
2417                 s390_j      (code, 4);
2418                 PTRSLOT (code, o[0]);
2419                 s390_cfdbr  (code, dreg, 5, sreg);
2420                 switch (size) {
2421                         case 1:
2422                                 s390_lghi (code, s390_r0, 0xff);
2423                                 s390_ngr  (code, dreg, s390_r0);
2424                                 break;
2425                         case 2:
2426                                 s390_lghi (code, s390_r0, -1);
2427                                 s390_srlg (code, s390_r0, s390_r0, 0, 16);
2428                                 s390_ngr  (code, dreg, s390_r0);
2429                                 break;
2430                 }
2431         }
2432         return code;
2433 }
2434
2435 /*========================= End of Function ========================*/
2436
2437 /*------------------------------------------------------------------*/
2438 /*                                                                  */
2439 /* Name         - mono_arch_output_basic_block                      */
2440 /*                                                                  */
2441 /* Function     - Perform the "real" work of emitting instructions  */
2442 /*                that will do the work of in the basic block.      */
2443 /*                                                                  */
2444 /*------------------------------------------------------------------*/
2445
2446 void
2447 mono_arch_output_basic_block (MonoCompile *cfg, MonoBasicBlock *bb)
2448 {
2449         MonoInst *ins;
2450         MonoCallInst *call;
2451         guint offset;
2452         guint8 *code = cfg->native_code + cfg->code_len;
2453         MonoInst *last_ins = NULL;
2454         guint last_offset = 0;
2455         int max_len, cpos, src2;
2456
2457         if (cfg->opt & MONO_OPT_PEEPHOLE)
2458                 peephole_pass (cfg, bb);
2459
2460         /* we don't align basic blocks of loops on s390 */
2461
2462         if (cfg->verbose_level > 2)
2463                 g_print ("Basic block %d starting at offset 0x%x\n", bb->block_num, bb->native_offset);
2464
2465         cpos = bb->max_offset;
2466
2467         if (cfg->prof_options & MONO_PROFILE_COVERAGE) {
2468                 //MonoCoverageInfo *cov = mono_get_coverage_info (cfg->method);
2469                 //g_assert (!mono_compile_aot);
2470                 //cpos += 6;
2471                 //if (bb->cil_code)
2472                 //      cov->data [bb->dfn].iloffset = bb->cil_code - cfg->cil_code;
2473                 /* this is not thread save, but good enough */
2474                 /* fixme: howto handle overflows? */
2475                 //x86_inc_mem (code, &cov->data [bb->dfn].count);
2476         }
2477
2478         ins = bb->code;
2479         while (ins) {
2480                 offset = code - cfg->native_code;
2481
2482                 max_len = ((guint8 *)ins_get_spec (ins->opcode))[MONO_INST_LEN];
2483
2484                 if (offset > (cfg->code_size - max_len - 16)) {
2485                         cfg->code_size *= 2;
2486                         cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
2487                         code = cfg->native_code + offset;
2488                 }
2489
2490                 mono_debug_record_line_number (cfg, ins, offset);
2491
2492                 switch (ins->opcode) {
2493                 case OP_STOREI1_MEMBASE_IMM: {
2494                         s390_lghi (code, s390_r0, ins->inst_imm);
2495                         S390_LONG (code, stcy, stc, s390_r0, 0,
2496                                    ins->inst_destbasereg, ins->inst_offset);
2497                 }
2498                         break;
2499                 case OP_STOREI2_MEMBASE_IMM: {
2500                         s390_lghi (code, s390_r0, ins->inst_imm);
2501                         S390_LONG (code, sthy, sth, s390_r0, 0,
2502                                    ins->inst_destbasereg, ins->inst_offset);
2503                 }
2504                         break;
2505                 case OP_STOREI4_MEMBASE_IMM: {
2506                         if (s390_is_imm16(ins->inst_imm)) {
2507                                 s390_lghi (code, s390_r0, ins->inst_imm);
2508                         } else {
2509                                 s390_basr (code, s390_r13, 0);
2510                                 s390_j    (code, 6);
2511                                 s390_llong(code, ins->inst_imm);
2512                                 s390_lg   (code, s390_r0, 0, s390_r13, 4);
2513                         }
2514                         S390_LONG (code, sty, st, s390_r0, 0,
2515                                    ins->inst_destbasereg, ins->inst_offset);
2516                 }
2517                         break;
2518                 case OP_STORE_MEMBASE_IMM:
2519                 case OP_STOREI8_MEMBASE_IMM: {
2520                         if (s390_is_imm16(ins->inst_imm)) {
2521                                 s390_lghi (code, s390_r0, ins->inst_imm);
2522                         } else {
2523                                 s390_basr (code, s390_r13, 0);
2524                                 s390_j    (code, 6);
2525                                 s390_llong(code, ins->inst_imm);
2526                                 s390_lg   (code, s390_r0, 0, s390_r13, 4);
2527                         }
2528                         S390_LONG (code, stg, stg, s390_r0, 0,
2529                                    ins->inst_destbasereg, ins->inst_offset);
2530                 }
2531                         break;
2532                 case OP_STOREI1_MEMBASE_REG: {
2533                         S390_LONG (code, stcy, stc, ins->sreg1, 0,
2534                                    ins->inst_destbasereg, ins->inst_offset);
2535                 }
2536                         break;
2537                 case OP_STOREI2_MEMBASE_REG: {
2538                         S390_LONG (code, sthy, sth, ins->sreg1, 0,
2539                                    ins->inst_destbasereg, ins->inst_offset);
2540                 }
2541                         break;
2542                 case OP_STOREI4_MEMBASE_REG: {
2543                         S390_LONG (code, sty, st, ins->sreg1, 0,
2544                                    ins->inst_destbasereg, ins->inst_offset);
2545                 }
2546                         break;
2547                 case OP_STORE_MEMBASE_REG:
2548                 case OP_STOREI8_MEMBASE_REG: {
2549                         S390_LONG (code, stg, stg, ins->sreg1, 0,
2550                                    ins->inst_destbasereg, ins->inst_offset);
2551                 }
2552                         break;
2553                 case CEE_LDIND_I:
2554                 case CEE_LDIND_I4: {
2555                         s390_basr (code, s390_r13, 0);
2556                         s390_j    (code, 6);
2557                         s390_llong(code, ins->inst_p0);
2558                         s390_lg   (code, s390_r13, 0, s390_r13, 4);
2559                         s390_lgf  (code, ins->dreg, 0, s390_r13, 0);
2560                 }
2561                         break;
2562                 case CEE_LDIND_U4: {
2563                         s390_basr (code, s390_r13, 0);
2564                         s390_j    (code, 6);
2565                         s390_llong(code, ins->inst_p0);
2566                         s390_lg   (code, s390_r13, 0, s390_r13, 4);
2567                         s390_llgf (code, ins->dreg, 0, s390_r13, 0);
2568                 }
2569                         break;
2570                 case OP_LOADU4_MEM:
2571                         g_assert_not_reached ();
2572                         break;
2573                 case OP_LOAD_MEMBASE:
2574                 case OP_LOADI8_MEMBASE: {
2575                         S390_LONG (code, lg, lg, ins->dreg, 0,
2576                                    ins->inst_basereg, ins->inst_offset);
2577                 }
2578                         break;
2579                 case OP_LOADI4_MEMBASE: {
2580                         S390_LONG (code, lgf, lgf, ins->dreg, 0,
2581                                    ins->inst_basereg, ins->inst_offset);
2582                 }
2583                         break;
2584                 case OP_LOADU4_MEMBASE: {
2585                         S390_LONG (code, llgf, llgf, ins->dreg, 0,
2586                                    ins->inst_basereg, ins->inst_offset);
2587                 }
2588                         break;
2589                 case OP_LOADU1_MEMBASE: {
2590                         S390_LONG (code, llgc, llgc, ins->dreg, 0,
2591                                    ins->inst_basereg, ins->inst_offset);
2592                 }
2593                         break;
2594                 case OP_LOADI1_MEMBASE: {
2595                         S390_LONG (code, lgb, lgb, ins->dreg, 0,
2596                                    ins->inst_basereg, ins->inst_offset);
2597                 }
2598                         break;
2599                 case OP_LOADU2_MEMBASE: {
2600                         S390_LONG (code, llgh, llgh, ins->dreg, 0,
2601                                    ins->inst_basereg, ins->inst_offset);
2602                 }
2603                         break;
2604                 case OP_LOADI2_MEMBASE: {
2605                         S390_LONG (code, lgh, lgh, ins->dreg, 0,
2606                                    ins->inst_basereg, ins->inst_offset);
2607                 }
2608                         break;
2609                 case CEE_CONV_I1: {
2610                         s390_lghi  (code, s390_r0, 0x80);
2611                         if (ins->dreg != ins->sreg1) {
2612                                 s390_lgr  (code, ins->dreg, ins->sreg1);
2613                         }
2614                         s390_ngr  (code, s390_r0, ins->sreg1);
2615                         s390_jz   (code, 9);
2616                         s390_lghi (code, s390_r13, -1);
2617                         s390_sllg (code, s390_r13, s390_r13, 0, 8);
2618                         s390_ogr  (code, ins->dreg, s390_r13);
2619                 }
2620                         break;
2621                 case CEE_CONV_I2: {
2622                         s390_lghi (code, s390_r0, 0x80);
2623                         s390_sllg (code, s390_r0, s390_r0, 0, 8);
2624                         if (ins->dreg != ins->sreg1) {
2625                                 s390_lgr  (code, ins->dreg, ins->sreg1);
2626                         }
2627                         s390_ngr  (code, s390_r0, ins->sreg1);
2628                         s390_jz   (code, 9);
2629                         s390_lghi (code, s390_r13, -1);
2630                         s390_sllg (code, s390_r13, s390_r13, 0, 16);
2631                         s390_ogr  (code, ins->dreg, s390_r13);
2632                 }
2633                         break;
2634                 case CEE_CONV_U1: {
2635                         s390_lghi (code, s390_r0, 0xff);
2636                         if (ins->dreg != ins->sreg1) {
2637                                 s390_lgr  (code, ins->dreg, ins->sreg1);
2638                         }
2639                         s390_ngr  (code, ins->dreg, s390_r0);
2640                 }
2641                         break;
2642                 case CEE_CONV_U2: {
2643                         s390_lghi (code, s390_r0, -1);
2644                         s390_sllg (code, s390_r0, s390_r0, 0, 16);
2645                         s390_srlg (code, s390_r0, s390_r0, 0, 16);
2646                         if (ins->dreg != ins->sreg1) {
2647                                 s390_lgr  (code, ins->dreg, ins->sreg1);
2648                         }
2649                         s390_ngr  (code, ins->dreg, s390_r0);
2650                 }
2651                         break;
2652                 case OP_COMPARE:
2653                 case OP_LCOMPARE: {
2654                         if ((ins->next) &&
2655                             (opcode_to_cond(ins->next->opcode) >= CMP_LE_UN))
2656                                 s390_clgr (code, ins->sreg1, ins->sreg2);
2657                         else
2658                                 s390_cgr  (code, ins->sreg1, ins->sreg2);
2659                 }
2660                         break;
2661                 case OP_COMPARE_IMM: {
2662                         if (s390_is_imm16 (ins->inst_imm)) {
2663                                 s390_lghi (code, s390_r0, ins->inst_imm);
2664                                 if ((ins->next) &&
2665                                     (opcode_to_cond(ins->next->opcode) >= CMP_LE_UN))
2666                                         s390_clgr (code, ins->sreg1, s390_r0);
2667                                 else
2668                                         s390_cgr  (code, ins->sreg1, s390_r0);
2669                         }
2670                         else {
2671                                 s390_basr (code, s390_r13, 0);
2672                                 s390_j    (code, 6);
2673                                 s390_llong(code, ins->inst_imm);
2674                                 if ((ins->next) &&
2675                                     (opcode_to_cond(ins->next->opcode) >= CMP_LE_UN))
2676                                         s390_clg  (code, ins->sreg1, 0, s390_r13, 4);
2677                                 else
2678                                         s390_cg   (code, ins->sreg1, 0, s390_r13, 4);
2679                         }
2680                 }
2681                         break;
2682                 case OP_ICOMPARE: {
2683                         if ((ins->next) &&
2684                             (opcode_to_cond(ins->next->opcode) >= CMP_LE_UN))
2685                                 s390_clr  (code, ins->sreg1, ins->sreg2);
2686                         else
2687                                 s390_cr   (code, ins->sreg1, ins->sreg2);
2688                 }
2689                         break;
2690                 case OP_ICOMPARE_IMM: {
2691                         if (s390_is_imm16 (ins->inst_imm)) {
2692                                 s390_lghi (code, s390_r0, ins->inst_imm);
2693                                 if ((ins->next) &&
2694                                     (opcode_to_cond(ins->next->opcode) >= CMP_LE_UN))
2695                                         s390_clr  (code, ins->sreg1, s390_r0);
2696                                 else
2697                                         s390_cr   (code, ins->sreg1, s390_r0);
2698                         }
2699                         else {
2700                                 s390_basr (code, s390_r13, 0);
2701                                 s390_j    (code, 4);
2702                                 s390_word (code, ins->inst_imm);
2703                                 if ((ins->next) &&
2704                                     (opcode_to_cond(ins->next->opcode) >= CMP_LE_UN))
2705                                         s390_cl  (code, ins->sreg1, 0, s390_r13, 4);
2706                                 else
2707                                         s390_c   (code, ins->sreg1, 0, s390_r13, 4);
2708                         }
2709                 }
2710                         break;
2711                 case CEE_BREAK: {
2712                         s390_basr  (code, s390_r13, 0);
2713                         s390_j     (code, 6);
2714                         mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS,
2715                                              mono_arch_break);
2716                         s390_llong (code, mono_arch_break);
2717                         s390_lg    (code, s390_r14, 0, s390_r13, 4);
2718                         s390_basr  (code, s390_r14, s390_r14);
2719                 }
2720                         break;
2721                 case OP_ADDCC: {
2722                         CHECK_SRCDST_COM;
2723                         s390_algr  (code, ins->dreg, src2);
2724                 }
2725                         break;
2726                 case CEE_ADD: {
2727                         CHECK_SRCDST_COM;
2728                         s390_agr   (code, ins->dreg, src2);
2729                 }
2730                         break;
2731                 case OP_ADC: {
2732                         CHECK_SRCDST_COM;
2733                         s390_alcgr (code, ins->dreg, src2);
2734                 }
2735                         break;
2736                 case OP_ADD_IMM: {
2737                         if (ins->dreg != ins->sreg1) {
2738                                 s390_lgr  (code, ins->dreg, ins->sreg1);
2739                         }
2740                         if (s390_is_imm16 (ins->inst_imm)) {
2741                                 s390_aghi (code, ins->dreg, ins->inst_imm);
2742                         } else {
2743                                 s390_basr (code, s390_r13, 0);
2744                                 s390_j    (code, 6);
2745                                 s390_llong(code, ins->inst_imm);
2746                                 s390_ag   (code, ins->dreg, 0, s390_r13, 4);
2747                         }
2748                 }
2749                         break;
2750                 case OP_ADC_IMM: {
2751                         if (ins->dreg != ins->sreg1) {
2752                                 s390_lgr  (code, ins->dreg, ins->sreg1);
2753                         }
2754                         if (s390_is_imm16 (ins->inst_imm)) {
2755                                 s390_lghi  (code, s390_r0, ins->inst_imm);
2756                                 s390_alcgr (code, ins->dreg, s390_r0);
2757                         } else {
2758                                 s390_basr  (code, s390_r13, 0);
2759                                 s390_j     (code, 6);
2760                                 s390_llong (code, ins->inst_imm);
2761                                 s390_lg    (code, s390_r13, 0, s390_r13, 4);
2762                                 s390_alcgr (code, ins->dreg, s390_r13);
2763                         }
2764                 }
2765                         break;
2766                 case OP_LADD_OVF: {
2767                         CHECK_SRCDST_COM;
2768                         s390_agr   (code, ins->dreg, src2);
2769                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2770                 }
2771                         break;
2772                 case OP_LADD_OVF_UN: {
2773                         CHECK_SRCDST_COM;
2774                         s390_algr  (code, ins->dreg, src2);
2775                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
2776                 }
2777                         break;
2778                 case OP_ADD_OVF_CARRY: {
2779                         CHECK_SRCDST_COM;
2780                         s390_lghi  (code, s390_r0, 0);
2781                         s390_lgr   (code, s390_r1, s390_r0);
2782                         s390_alcgr (code, s390_r0, s390_r1);
2783                         s390_agr   (code, ins->dreg, src2);
2784                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2785                         s390_agr   (code, ins->dreg, s390_r0);
2786                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2787                 }
2788                         break;
2789                 case OP_ADD_OVF_UN_CARRY: {
2790                         CHECK_SRCDST_COM;
2791                         s390_alcgr (code, ins->dreg, src2);
2792                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
2793                 }
2794                         break;
2795                 case OP_SUBCC: {
2796                         CHECK_SRCDST_NCOM;
2797                         s390_slgr (code, ins->dreg, src2);
2798                 }
2799                         break;
2800                 case CEE_SUB: {
2801                         CHECK_SRCDST_NCOM;
2802                         s390_sgr  (code, ins->dreg, src2);
2803                 }
2804                         break;
2805                 case OP_SBB: {
2806                         CHECK_SRCDST_NCOM;
2807                         s390_slbgr(code, ins->dreg, src2);
2808                 }
2809                         break;
2810                 case OP_SUB_IMM: {
2811                         if (ins->dreg != ins->sreg1) {
2812                                 s390_lgr   (code, ins->dreg, ins->sreg1);
2813                         }
2814                         if (s390_is_imm16 (-ins->inst_imm)) {
2815                                 s390_lghi  (code, s390_r0, ins->inst_imm);
2816                                 s390_slgr  (code, ins->dreg, s390_r0);
2817                         } else {
2818                                 s390_basr (code, s390_r13, 0);
2819                                 s390_j    (code, 6);
2820                                 s390_llong(code, ins->inst_imm);
2821                                 s390_slg  (code, ins->dreg, 0, s390_r13, 4);
2822                         }
2823                 }
2824                         break;
2825                 case OP_SBB_IMM: {
2826                         if (ins->dreg != ins->sreg1) {
2827                                 s390_lgr   (code, ins->dreg, ins->sreg1);
2828                         }
2829                         if (s390_is_imm16 (-ins->inst_imm)) {
2830                                 s390_lghi  (code, s390_r0, ins->inst_imm);
2831                                 s390_slbgr (code, ins->dreg, s390_r0);
2832                         } else {
2833                                 s390_basr (code, s390_r13, 0);
2834                                 s390_j    (code, 6);
2835                                 s390_llong(code, ins->inst_imm);
2836                                 s390_slbg (code, ins->dreg, 0, s390_r13, 4);
2837                         }
2838                 }
2839                         break;
2840                 case OP_LSUB_OVF: {
2841                         CHECK_SRCDST_NCOM;
2842                         s390_sgr  (code, ins->dreg, src2);
2843                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2844                 }
2845                         break;
2846                 case OP_LSUB_OVF_UN: {
2847                         CHECK_SRCDST_NCOM;
2848                         s390_slgr (code, ins->dreg, src2);
2849                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
2850                 }
2851                         break;
2852                 case OP_SUB_OVF_CARRY: {
2853                         CHECK_SRCDST_NCOM;
2854                         s390_lghi  (code, s390_r0, 0);
2855                         s390_lgr   (code, s390_r1, s390_r0);
2856                         s390_slbgr (code, s390_r0, s390_r1);
2857                         s390_sgr   (code, ins->dreg, src2);
2858                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2859                         s390_agr   (code, ins->dreg, s390_r0);
2860                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2861                 }
2862                         break;
2863                 case OP_SUB_OVF_UN_CARRY: {
2864                         CHECK_SRCDST_NCOM;
2865                         s390_slbgr (code, ins->dreg, src2);
2866                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
2867                 }
2868                         break;
2869                 case CEE_AND: {
2870                         if (ins->sreg1 == ins->dreg) {
2871                                 s390_ngr  (code, ins->dreg, ins->sreg2);
2872                         }
2873                         else {
2874                                 if (ins->sreg2 == ins->dreg) {
2875                                         s390_ngr (code, ins->dreg, ins->sreg1);
2876                                 }
2877                                 else {
2878                                         s390_lgr (code, ins->dreg, ins->sreg1);
2879                                         s390_ngr (code, ins->dreg, ins->sreg2);
2880                                 }
2881                         }
2882                 }
2883                         break;
2884                 case OP_AND_IMM: {
2885                         if (ins->dreg != ins->sreg1) {
2886                                 s390_lgr  (code, ins->dreg, ins->sreg1);
2887                         }
2888                         if (s390_is_imm16 (ins->inst_imm)) {
2889                                 s390_lghi  (code, s390_r0, ins->inst_imm);
2890                                 s390_ngr  (code, ins->dreg, s390_r0);
2891                         } else {
2892                                 s390_basr (code, s390_r13, 0);
2893                                 s390_j    (code, 6);
2894                                 s390_llong(code, ins->inst_imm);
2895                                 s390_ng   (code, ins->dreg, 0, s390_r13, 4);
2896                         }
2897                 }
2898                         break;
2899                 case OP_LDIV: {
2900                         s390_lgr  (code, s390_r1, ins->sreg1);
2901                         s390_dsgr (code, s390_r0, ins->sreg2);
2902                         s390_lgr  (code, ins->dreg, s390_r1);
2903                 }
2904                         break;
2905                 case OP_LDIV_UN: {
2906                         s390_lgr   (code, s390_r1, ins->sreg1);
2907                         s390_lghi  (code, s390_r0, 0);
2908                         s390_dlgr  (code, s390_r0, ins->sreg2);
2909                         s390_lgr   (code, ins->dreg, s390_r1);
2910                 }
2911                         break;
2912                 case OP_DIV_IMM: {
2913                         if (s390_is_imm16 (ins->inst_imm)) {
2914                                 s390_lghi (code, s390_r13, ins->inst_imm);
2915                                 s390_lgr  (code, s390_r1, ins->sreg1);
2916                         } else {
2917                                 s390_basr (code, s390_r13, 0);
2918                                 s390_j    (code, 6);
2919                                 s390_llong(code, ins->inst_imm);
2920                                 s390_lgr  (code, s390_r1, ins->sreg1);
2921                                 s390_lg   (code, s390_r13, 0, s390_r13, 4);
2922                         }
2923                         s390_dsgr (code, s390_r0, s390_r13);
2924                         s390_lgr  (code, ins->dreg, s390_r1);
2925                 }
2926                         break;
2927                 case OP_LREM: {
2928                         s390_lgr  (code, s390_r1, ins->sreg1);
2929                         s390_dsgr (code, s390_r0, ins->sreg2);
2930                         s390_lgr  (code, ins->dreg, s390_r0);
2931                         break;
2932                 }
2933                 case OP_LREM_UN: {
2934                         s390_lgr   (code, s390_r1, ins->sreg1);
2935                         s390_lghi  (code, s390_r0, 0);
2936                         s390_dlgr  (code, s390_r0, ins->sreg2);
2937                         s390_lgr   (code, ins->dreg, s390_r0);
2938                 }
2939                         break;
2940                 case OP_REM_IMM: {
2941                         if (s390_is_imm16 (ins->inst_imm)) {
2942                                 s390_lghi  (code, s390_r13, ins->inst_imm);
2943                                 s390_lgr   (code, s390_r0, ins->sreg1);
2944                         } else {
2945                                 s390_basr (code, s390_r13, 0);
2946                                 s390_j    (code, 6);
2947                                 s390_llong(code, ins->inst_imm);
2948                                 s390_lgr  (code, s390_r0, ins->sreg1);
2949                                 s390_lg   (code, s390_r13, 0, s390_r13, 4);
2950                         }
2951                         s390_dsgr(code, s390_r0, s390_r13);
2952                         s390_lgr (code, ins->dreg, s390_r0);
2953                 }
2954                         break;
2955                 case CEE_OR: {
2956                         if (ins->sreg1 == ins->dreg) {
2957                                 s390_ogr  (code, ins->dreg, ins->sreg2);
2958                         }
2959                         else {
2960                                 if (ins->sreg2 == ins->dreg) {
2961                                         s390_ogr (code, ins->dreg, ins->sreg1);
2962                                 }
2963                                 else {
2964                                         s390_lgr (code, ins->dreg, ins->sreg1);
2965                                         s390_ogr (code, ins->dreg, ins->sreg2);
2966                                 }
2967                         }
2968                 }
2969                         break;
2970                 case OP_OR_IMM: {
2971                         if (ins->dreg != ins->sreg1) {
2972                                 s390_lgr  (code, ins->dreg, ins->sreg1);
2973                         }
2974                         if (s390_is_imm16 (ins->inst_imm)) {
2975                                 s390_lghi (code, s390_r0, ins->inst_imm);
2976                                 s390_ogr  (code, ins->dreg, s390_r0);
2977                         } else {
2978                                 s390_basr (code, s390_r13, 0);
2979                                 s390_j    (code, 6);
2980                                 s390_llong(code, ins->inst_imm);
2981                                 s390_og   (code, ins->dreg, 0, s390_r13, 4);
2982                         }
2983                 }
2984                         break;
2985                 case CEE_XOR: {
2986                         if (ins->sreg1 == ins->dreg) {
2987                                 s390_xgr  (code, ins->dreg, ins->sreg2);
2988                         }
2989                         else {
2990                                 if (ins->sreg2 == ins->dreg) {
2991                                         s390_xgr (code, ins->dreg, ins->sreg1);
2992                                 }
2993                                 else {
2994                                         s390_lgr (code, ins->dreg, ins->sreg1);
2995                                         s390_xgr (code, ins->dreg, ins->sreg2);
2996                                 }
2997                         }
2998                 }
2999                         break;
3000                 case OP_XOR_IMM: {
3001                         if (ins->dreg != ins->sreg1) {
3002                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3003                         }
3004                         if (s390_is_imm16 (ins->inst_imm)) {
3005                                 s390_lghi  (code, s390_r0, ins->inst_imm);
3006                                 s390_xgr  (code, ins->dreg, s390_r0);
3007                         } else {
3008                                 s390_basr (code, s390_r13, 0);
3009                                 s390_j    (code, 6);
3010                                 s390_llong(code, ins->inst_imm);
3011                                 s390_xg   (code, ins->dreg, 0, s390_r13, 4);
3012                         }
3013                 }
3014                         break;
3015                 case CEE_SHL:
3016                 case OP_LSHL: {
3017                         CHECK_SRCDST_NCOM;
3018                         s390_sllg (code, ins->dreg, ins->dreg, src2, 0);
3019                 }
3020                         break;
3021                 case OP_SHL_IMM:
3022                 case OP_LSHL_IMM: {
3023                         if (ins->sreg1 != ins->dreg) {
3024                                 s390_lgr   (code, ins->dreg, ins->sreg1);
3025                         }
3026                         s390_sllg (code, ins->dreg, ins->dreg, 0, (ins->inst_imm & 0x3f));
3027                 }
3028                         break;
3029                 case CEE_SHR:
3030                 case OP_LSHR: {
3031                         CHECK_SRCDST_NCOM;
3032                         s390_srag  (code, ins->dreg, ins->dreg, src2, 0);
3033                 }
3034                         break;
3035                 case OP_SHR_IMM:
3036                 case OP_LSHR_IMM: {
3037                         if (ins->sreg1 != ins->dreg) {
3038                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3039                         }
3040                         s390_srag  (code, ins->dreg, ins->dreg, 0, (ins->inst_imm & 0x3f));
3041                 }
3042                         break;
3043                 case OP_SHR_UN_IMM:
3044                 case OP_LSHR_UN_IMM: {
3045                         if (ins->sreg1 != ins->dreg) {
3046                                 s390_lgr   (code, ins->dreg, ins->sreg1);
3047                         }
3048                         s390_srlg (code, ins->dreg, ins->dreg, 0, (ins->inst_imm & 0x3f));
3049                 }
3050                         break;
3051                 case CEE_SHR_UN:
3052                 case OP_LSHR_UN: {
3053                         CHECK_SRCDST_NCOM;
3054                         s390_srlg (code, ins->dreg, ins->dreg, src2, 0);
3055                 }
3056                         break;
3057                 case CEE_NOT: {
3058                         if (ins->sreg1 != ins->dreg) {
3059                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3060                         }
3061                         s390_lghi (code, s390_r0, -1);
3062                         s390_xgr  (code, ins->dreg, s390_r0);
3063                 }
3064                         break;
3065                 case CEE_NEG: {
3066                         s390_lcgr (code, ins->dreg, ins->sreg1);
3067                 }
3068                         break;
3069                 case CEE_MUL:
3070                 case OP_LMUL: {
3071                         CHECK_SRCDST_COM;
3072                         s390_msgr (code, ins->dreg, src2);
3073                 }
3074                         break;
3075                 case OP_MUL_IMM:
3076                 case OP_LMUL_IMM: {
3077                         if (ins->dreg != ins->sreg1) {
3078                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3079                         }
3080                         if (s390_is_imm16 (ins->inst_imm)) {
3081                                 s390_lghi (code, s390_r13, ins->inst_imm);
3082                         } else {
3083                                 s390_basr (code, s390_r13, 0);
3084                                 s390_j    (code, 6);
3085                                 s390_llong(code, ins->inst_imm);
3086                                 s390_lg   (code, s390_r13, 0, s390_r13, 4);
3087                         }
3088                         s390_msgr (code, ins->dreg, s390_r13);
3089                 }
3090                         break;
3091                 case OP_LMUL_OVF:
3092                 case CEE_MUL_OVF: {
3093                         short int *o[2];
3094                         s390_ltgr (code, s390_r1, ins->sreg1);
3095                         s390_jz   (code, 0); CODEPTR(code, o[0]);
3096                         s390_ltgr (code, s390_r0, ins->sreg2);
3097                         s390_jnz  (code, 6);
3098                         s390_lghi (code, s390_r1, 0);
3099                         s390_j    (code, 0); CODEPTR(code, o[1]);
3100                         s390_xgr  (code, s390_r0, s390_r1);
3101                         s390_msgr (code, s390_r1, ins->sreg2);
3102                         s390_xgr  (code, s390_r0, s390_r1);
3103                         s390_srlg (code, s390_r0, s390_r0, 0, 63);
3104                         s390_ltgr (code, s390_r0, s390_r0);
3105                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3106                         PTRSLOT   (code, o[0]);
3107                         PTRSLOT   (code, o[1]);
3108                         s390_lgr  (code, ins->dreg, s390_r1);
3109                 }
3110                         break;
3111                 case OP_LMUL_OVF_UN:
3112                 case CEE_MUL_OVF_UN: {
3113                         s390_lghi  (code, s390_r0, 0);
3114                         s390_lgr   (code, s390_r1, ins->sreg1);
3115                         s390_mlgr  (code, s390_r0, ins->sreg2);
3116                         s390_ltgr  (code, s390_r0, s390_r0);
3117                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3118                         s390_lgr   (code, ins->dreg, s390_r1);
3119                 }
3120                         break;
3121                 case OP_IADDCC: {
3122                         g_assert_not_reached ();
3123                         CHECK_SRCDST_COM_I;
3124                         s390_algr (code, ins->dreg, src2);
3125                 }
3126                         break;
3127                 case OP_IADD: {
3128                         CHECK_SRCDST_COM_I;
3129                         s390_agr  (code, ins->dreg, src2);
3130                 }
3131                         break;
3132                 case OP_IADC: {
3133                         g_assert_not_reached ();
3134                         CHECK_SRCDST_COM_I;
3135                         s390_alcgr (code, ins->dreg, src2);
3136                 }
3137                         break;
3138                 case OP_IADD_IMM: {
3139                         if (ins->dreg != ins->sreg1) {
3140                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3141                         }
3142                         if (s390_is_imm16 (ins->inst_imm)) {
3143                                 s390_aghi(code, ins->dreg, ins->inst_imm);
3144                         } else {
3145                                 s390_basr (code, s390_r13, 0);
3146                                 s390_j    (code, 4);
3147                                 s390_word (code, ins->inst_imm);
3148                                 s390_agf  (code, ins->dreg, 0, s390_r13, 4);
3149                         }
3150                 }
3151                         break;
3152                 case OP_IADC_IMM: {
3153                         if (ins->dreg != ins->sreg1) {
3154                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3155                         }
3156                         if (s390_is_imm16 (ins->inst_imm)) {
3157                                 s390_lghi  (code, s390_r0, ins->inst_imm);
3158                                 s390_alcgr (code, ins->dreg, s390_r0);
3159                         } else {
3160                                 s390_basr  (code, s390_r13, 0);
3161                                 s390_j     (code, 4);
3162                                 s390_word  (code, ins->inst_imm);
3163                                 s390_lgf   (code, s390_r13, 0, s390_r13, 4);
3164                                 s390_alcgr (code, ins->dreg, s390_r13);
3165                         }
3166                 }
3167                         break;
3168                 case CEE_ADD_OVF: {
3169                         CHECK_SRCDST_COM;
3170                         s390_ar    (code, ins->dreg, src2);
3171                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3172                         s390_lgfr  (code, ins->dreg, ins->dreg);
3173                 }
3174                         break;
3175                 case CEE_ADD_OVF_UN: {
3176                         CHECK_SRCDST_COM;
3177                         s390_algr  (code, ins->dreg, src2);
3178                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
3179                         s390_llgfr (code, ins->dreg, ins->dreg);
3180                 }
3181                         break;
3182                 case OP_ISUBCC: {
3183                         CHECK_SRCDST_NCOM_I;
3184                         s390_slgr (code, ins->dreg, src2);
3185                 }
3186                         break;
3187                 case OP_ISUB: {
3188                         CHECK_SRCDST_NCOM_I;
3189                         s390_sgr  (code, ins->dreg, src2);
3190                 }
3191                         break;
3192                 case OP_ISBB: {
3193                         CHECK_SRCDST_NCOM_I;
3194                         s390_slbgr (code, ins->dreg, src2);
3195                 }
3196                         break;
3197                 case OP_ISUB_IMM: {
3198                         if (ins->dreg != ins->sreg1) {
3199                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3200                         }
3201                         if (s390_is_imm16 (-ins->inst_imm)) {
3202                                 s390_aghi (code, ins->dreg, -ins->inst_imm);
3203                         } else {
3204                                 s390_basr (code, s390_r13, 0);
3205                                 s390_j    (code, 4);
3206                                 s390_word (code, ins->inst_imm);
3207                                 s390_sgf  (code, ins->dreg, 0, s390_r13, 4);
3208                         }
3209                 }
3210                         break;
3211                 case OP_ISBB_IMM: {
3212                         s390_basr (code, s390_r13, 0);
3213                         s390_j    (code, 4);
3214                         s390_word (code, ins->inst_imm);
3215                         s390_slgf (code, ins->dreg, 0, s390_r13, 4);
3216                 }
3217                         break;
3218                 case CEE_SUB_OVF: {
3219                         CHECK_SRCDST_NCOM;
3220                         s390_sr   (code, ins->dreg, src2);
3221                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3222                         s390_lgfr (code, ins->dreg, ins->dreg);
3223                 }
3224                         break;
3225                 case CEE_SUB_OVF_UN: {
3226                         CHECK_SRCDST_NCOM;
3227                         s390_slr  (code, ins->dreg, src2);
3228                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
3229                         s390_llgfr(code, ins->dreg, ins->dreg);
3230                 }
3231                         break;
3232                 case OP_IAND: {
3233                         CHECK_SRCDST_NCOM_I;
3234                         s390_ngr (code, ins->dreg, src2);
3235                 }
3236                         break;
3237                 case OP_IAND_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_lghi (code, s390_r0, ins->inst_imm);
3243                                 s390_ngr  (code, ins->dreg, s390_r0);
3244                         } else {
3245                                 s390_basr (code, s390_r13, 0);
3246                                 s390_j    (code, 6);
3247                                 s390_llong(code, ins->inst_imm);
3248                                 s390_ng   (code, ins->dreg, 0, s390_r13, 4);
3249                         }
3250                 }
3251                         break;
3252                 case OP_IDIV: {
3253                         s390_lgfr (code, s390_r0, ins->sreg1);
3254                         s390_srda (code, s390_r0, 0, 32);
3255                         s390_dr   (code, s390_r0, ins->sreg2);
3256                         s390_lgfr (code, ins->dreg, s390_r1);
3257                 }
3258                         break;
3259                 case OP_IDIV_UN: {
3260                         s390_lgfr (code, s390_r0, ins->sreg1);
3261                         s390_srdl (code, s390_r0, 0, 32);
3262                         s390_dlr  (code, s390_r0, ins->sreg2);
3263                         s390_lgfr (code, ins->dreg, s390_r1);
3264                 }
3265                         break;
3266                 case OP_IDIV_IMM: {
3267                         if (s390_is_imm16 (ins->inst_imm)) {
3268                                 s390_lghi (code, s390_r13, ins->inst_imm);
3269                                 s390_lgfr (code, s390_r0, ins->sreg1);
3270                         } else {
3271                                 s390_basr (code, s390_r13, 0);
3272                                 s390_j    (code, 4);
3273                                 s390_word (code, ins->inst_imm);
3274                                 s390_lgfr (code, s390_r0, ins->sreg1);
3275                                 s390_lgf  (code, s390_r13, 0, s390_r13, 4);
3276                         }
3277                         s390_srda (code, s390_r0, 0, 32);
3278                         s390_dr   (code, s390_r0, ins->sreg2);
3279                         s390_lgfr (code, ins->dreg, s390_r1);
3280                 }
3281                         break;
3282                 case OP_IREM: {
3283                         s390_lgfr (code, s390_r0, ins->sreg1);
3284                         s390_srda (code, s390_r0, 0, 32);
3285                         s390_dr   (code, s390_r0, ins->sreg2);
3286                         s390_lgfr (code, ins->dreg, s390_r0);
3287                         break;
3288                 case OP_IREM_UN:
3289                         s390_lgfr (code, s390_r0, ins->sreg1);
3290                         s390_srdl (code, s390_r0, 0, 32);
3291                         s390_dlr  (code, s390_r0, ins->sreg2);
3292                         s390_lgfr (code, ins->dreg, s390_r0);
3293                 }
3294                         break;
3295                 case OP_IREM_IMM: {
3296                         if (s390_is_imm16 (ins->inst_imm)) {
3297                                 s390_lghi (code, s390_r13, ins->inst_imm);
3298                                 s390_lgfr (code, s390_r0, ins->sreg1);
3299                         } else {
3300                                 s390_basr (code, s390_r13, 0);
3301                                 s390_j    (code, 4);
3302                                 s390_word (code, ins->inst_imm);
3303                                 s390_lgfr (code, s390_r0, ins->sreg1);
3304                                 s390_lgf  (code, s390_r13, 0, s390_r13, 4);
3305                         }
3306                         s390_srda (code, s390_r0, 0, 32);
3307                         s390_dr   (code, s390_r0, ins->sreg2);
3308                         s390_lgfr (code, ins->dreg, s390_r0);
3309                 }
3310                         break;
3311                 case OP_IOR: {
3312                         CHECK_SRCDST_COM_I;
3313                         s390_ogr (code, ins->dreg, src2);
3314                 }
3315                         break;
3316                 case OP_IOR_IMM: {
3317                         if (ins->dreg != ins->sreg1) {
3318                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3319                         }
3320                         if (s390_is_imm16 (ins->inst_imm)) {
3321                                 s390_lghi (code, s390_r0, ins->inst_imm);
3322                                 s390_ogr  (code, ins->dreg, s390_r0);
3323                         } else {
3324                                 s390_basr (code, s390_r13, 0);
3325                                 s390_j    (code, 6);
3326                                 s390_llong(code, ins->inst_imm);
3327                                 s390_og   (code, ins->dreg, 0, s390_r13, 4);
3328                         }
3329                 }
3330                         break;
3331                 case OP_IXOR: {
3332                         CHECK_SRCDST_COM_I;
3333                         s390_xgr (code, ins->dreg, src2);
3334                 }
3335                         break;
3336                 case OP_IXOR_IMM: {
3337                         if (ins->dreg != ins->sreg1) {
3338                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3339                         }
3340                         if (s390_is_imm16 (ins->inst_imm)) {
3341                                 s390_lghi (code, s390_r0, ins->inst_imm);
3342                                 s390_xgr  (code, ins->dreg, s390_r0);
3343                         } else {
3344                                 s390_basr (code, s390_r13, 0);
3345                                 s390_j    (code, 6);
3346                                 s390_llong(code, ins->inst_imm);
3347                                 s390_xg   (code, ins->dreg, 0, s390_r13, 4);
3348                         }
3349                 }
3350                         break;
3351                 case OP_ISHL: {
3352                         if (ins->sreg1 != ins->dreg) {
3353                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3354                         }
3355                         s390_sll  (code, ins->dreg, ins->sreg2, 0);
3356                 }
3357                         break;
3358                 case OP_ISHL_IMM: {
3359                         if (ins->sreg1 != ins->dreg) {
3360                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3361                         }
3362                         s390_sll (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3363                 }
3364                         break;
3365                 case OP_ISHR: {
3366                         if (ins->sreg1 != ins->dreg) {
3367                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3368                         }
3369                         s390_sra (code, ins->dreg, ins->sreg2, 0);
3370                 }
3371                         break;
3372                 case OP_ISHR_IMM: {
3373                         if (ins->sreg1 != ins->dreg) {
3374                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3375                         }
3376                         s390_sra (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3377                 }
3378                         break;
3379                 case OP_ISHR_UN_IMM: {
3380                         if (ins->sreg1 != ins->dreg) {
3381                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3382                         }
3383                         s390_srl (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3384                 }
3385                         break;
3386                 case OP_ISHR_UN: {
3387                         if (ins->sreg1 != ins->dreg) {
3388                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3389                         }
3390                         s390_srl  (code, ins->dreg, ins->sreg2, 0);
3391                 }
3392                         break;
3393                 case OP_INOT: {
3394                         if (ins->sreg1 != ins->dreg) {
3395                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3396                         }
3397                         s390_lghi (code, s390_r0, -1);
3398                         s390_xgr  (code, ins->dreg, s390_r0);
3399                 }
3400                         break;
3401                 case OP_INEG: {
3402                         s390_lcgr (code, ins->dreg, ins->sreg1);
3403                 }
3404                         break;
3405                 case OP_IMUL: {
3406                         CHECK_SRCDST_COM_I;
3407                         s390_msr (code, ins->dreg, src2);
3408                 }
3409                         break;
3410                 case OP_IMUL_IMM: {
3411                         if (ins->dreg != ins->sreg1) {
3412                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3413                         }
3414                         if (s390_is_imm16 (ins->inst_imm)) {
3415                                 s390_lghi (code, s390_r13, ins->inst_imm);
3416                         } else {
3417                                 s390_basr (code, s390_r13, 0);
3418                                 s390_j    (code, 4);
3419                                 s390_word (code, ins->inst_imm);
3420                                 s390_lgf  (code, s390_r13, 0, s390_r13, 4);
3421                         }
3422                         s390_msr  (code, ins->dreg, s390_r13);
3423                 }
3424                         break;
3425                 case OP_IMUL_OVF: {
3426                         short int *o[2];
3427                         s390_ltr  (code, s390_r1, ins->sreg1);
3428                         s390_jz   (code, 0); CODEPTR(code, o[0]);
3429                         s390_ltr  (code, s390_r0, ins->sreg2);
3430                         s390_jnz  (code, 6);
3431                         s390_lhi  (code, s390_r1, 0);
3432                         s390_j    (code, 0); CODEPTR(code, o[1]);
3433                         s390_xr   (code, s390_r0, s390_r1);
3434                         s390_msr  (code, s390_r1, ins->sreg2);
3435                         s390_xr   (code, s390_r0, s390_r1);
3436                         s390_srl  (code, s390_r0, 0, 31);
3437                         s390_ltr  (code, s390_r0, s390_r0);
3438                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3439                         PTRSLOT   (code, o[0]);
3440                         PTRSLOT   (code, o[1]);
3441                         s390_lgfr (code, ins->dreg, s390_r1);
3442                 }
3443                         break;
3444                 case OP_IMUL_OVF_UN: {
3445                         s390_lhi  (code, s390_r0, 0);
3446                         s390_lr   (code, s390_r1, ins->sreg1);
3447                         s390_mlr  (code, s390_r0, ins->sreg2);
3448                         s390_ltr  (code, s390_r0, s390_r0);
3449                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3450                         s390_lgfr (code, ins->dreg, s390_r1);
3451                 }
3452                         break;
3453                 case OP_ICONST:
3454                 case OP_I8CONST:
3455                 case OP_SETREGIMM: {
3456                         if (s390_is_imm16(ins->inst_c0)) {
3457                                 s390_lghi (code, ins->dreg, ins->inst_c0);
3458                         } else {
3459                                 s390_basr (code, s390_r13, 0);
3460                                 s390_j    (code, 6);
3461                                 s390_llong(code, ins->inst_c0);
3462                                 s390_lg   (code, ins->dreg, 0, s390_r13, 4);
3463                         }
3464                 }
3465                         break;
3466                 case OP_AOTCONST: {
3467                         s390_basr (code, s390_r13, 0);
3468                         s390_j    (code, 6);
3469                         mono_add_patch_info (cfg, code - cfg->native_code,
3470                                 (MonoJumpInfoType)ins->inst_i1, ins->inst_p0);
3471                         s390_llong(code, 0);
3472                         s390_lg   (code,ins->dreg, 0, s390_r13, 4);
3473                 }
3474                         break;
3475                 case CEE_CONV_I:
3476                 case CEE_CONV_I8:
3477                 case OP_MOVE:
3478                 case OP_SETREG: {
3479                         if (ins->dreg != ins->sreg1) {
3480                                 s390_lgr (code, ins->dreg, ins->sreg1);
3481                         }
3482                 }
3483                         break;
3484                 case CEE_CONV_I4:
3485                         s390_lgfr (code, ins->dreg, ins->sreg1);
3486                         break;
3487                 case CEE_CONV_U:
3488                 case CEE_CONV_U8:
3489                 case CEE_CONV_U4:
3490                         s390_llgfr (code, ins->dreg, ins->sreg1);
3491                         break;
3492                 case CEE_CONV_OVF_U4:
3493                         s390_basr (code, s390_r13, 0);
3494                         s390_j    (code, 6);
3495                         s390_llong(code, 4294967295);
3496                         s390_clg  (code, ins->sreg1, 0, s390_r13, 4);
3497                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GT, "OverflowException");
3498                         s390_ltgr (code, ins->sreg1, ins->sreg1);
3499                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, "OverflowException");
3500                         s390_llgfr(code, ins->dreg, ins->sreg1);
3501                         break;
3502                 case CEE_CONV_OVF_I4_UN:
3503                         s390_basr (code, s390_r13, 0);
3504                         s390_j    (code, 6);
3505                         s390_llong(code, 2147483647);
3506                         s390_cg   (code, ins->sreg1, 0, s390_r13, 4);
3507                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GT, "OverflowException");
3508                         s390_ltgr (code, ins->sreg1, ins->sreg1);
3509                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, "OverflowException");
3510                         s390_lgfr (code, ins->dreg, ins->sreg1);
3511                         break;
3512                 case OP_SETFREG:
3513                 case OP_FMOVE: {
3514                         if (ins->dreg != ins->sreg1) {
3515                                 s390_ldr   (code, ins->dreg, ins->sreg1);
3516                         }
3517                 }
3518                         break;
3519                 case OP_S390_SETF4RET: {
3520                         s390_ledbr (code, ins->dreg, ins->sreg1);
3521                 }
3522                         break;
3523                 case OP_FCONV_TO_R4: {
3524                         g_error ("Shouldn't be reached");
3525                         if ((ins->next) &&
3526                             (ins->next->opcode != OP_FMOVE) &&
3527                             (ins->next->opcode != OP_STORER4_MEMBASE_REG))
3528                                 s390_ledbr (code, ins->dreg, ins->sreg1);
3529                 }
3530                         break;
3531                 case CEE_JMP: {
3532                         if (cfg->method->save_lmf)
3533                                 restoreLMF(code, cfg->frame_reg, cfg->stack_usage);
3534
3535                         if (cfg->flags & MONO_CFG_HAS_TAIL) {
3536                                 code =  emit_load_volatile_registers(code, cfg);
3537                         }
3538
3539                         code = backUpStackPtr(cfg, code);
3540                         s390_lg  (code, s390_r14, 0, STK_BASE, S390_RET_ADDR_OFFSET);
3541                         mono_add_patch_info (cfg, code - cfg->native_code,
3542                                              MONO_PATCH_INFO_METHOD_JUMP,
3543                                              ins->inst_p0);
3544                         s390_jcl (code, S390_CC_UN, 0);
3545                 }
3546                         break;
3547                 case OP_CHECK_THIS: {
3548                         /* ensure ins->sreg1 is not NULL */
3549                         s390_lg   (code, s390_r0, 0, ins->sreg1, 0);
3550                         s390_ltgr (code, s390_r0, s390_r0);
3551                 }
3552                         break;
3553                 case OP_ARGLIST: {
3554                         int offset = cfg->sig_cookie + cfg->stack_usage;
3555
3556                         if (s390_is_imm16 (offset))
3557                                 s390_lghi (code, s390_r0, offset);
3558                         else {
3559                                 s390_basr (code, s390_r13, 0);
3560                                 s390_j    (code, 6);
3561                                 s390_llong(code, offset);
3562                                 s390_lg   (code, s390_r0, 0, s390_r13, 0);
3563                         }
3564                         s390_agr  (code, s390_r0, cfg->frame_reg);
3565                         s390_stg  (code, s390_r0, 0, ins->sreg1, 0);
3566                 }
3567                         break;
3568                 case OP_FCALL: {
3569                         s390_basr (code, s390_r13, 0);
3570                         s390_j    (code, 6);
3571                         call = (MonoCallInst*)ins;
3572                         if (ins->flags & MONO_INST_HAS_METHOD)
3573                                 mono_add_patch_info (cfg, code-cfg->native_code,
3574                                                      MONO_PATCH_INFO_METHOD,
3575                                                      call->method);
3576                         else
3577                                 mono_add_patch_info (cfg, code-cfg->native_code,
3578                                                      MONO_PATCH_INFO_ABS,
3579                                                      call->fptr);
3580                         s390_llong(code, 0);
3581                         s390_lg   (code, s390_r14, 0, s390_r13, 4);
3582                         s390_basr (code, s390_r14, s390_r14);
3583                         if (call->signature->ret->type == MONO_TYPE_R4)
3584                                 s390_ldebr (code, s390_f0, s390_f0);
3585                 }
3586                         break;
3587                 case OP_LCALL:
3588                 case OP_VCALL:
3589                 case OP_VOIDCALL:
3590                 case CEE_CALL: {
3591                         s390_basr (code, s390_r13, 0);
3592                         s390_j    (code, 6);
3593                         call = (MonoCallInst*)ins;
3594                         if (ins->flags & MONO_INST_HAS_METHOD)
3595                                 mono_add_patch_info (cfg, code-cfg->native_code,
3596                                                      MONO_PATCH_INFO_METHOD,
3597                                                      call->method);
3598                         else
3599                                 mono_add_patch_info (cfg, code-cfg->native_code,
3600                                                      MONO_PATCH_INFO_ABS,
3601                                                      call->fptr);
3602                         s390_llong(code, 0);
3603                         s390_lg   (code, s390_r14, 0, s390_r13, 4);
3604                         s390_basr (code, s390_r14, s390_r14);
3605                 }
3606                         break;
3607                 case OP_FCALL_REG: {
3608                         call = (MonoCallInst*)ins;
3609                         s390_lgr  (code, s390_r1, ins->sreg1);
3610                         s390_basr (code, s390_r14, s390_r1);
3611                         if (call->signature->ret->type == MONO_TYPE_R4)
3612                                 s390_ldebr (code, s390_f0, s390_f0);
3613                 }
3614                         break;
3615                 case OP_LCALL_REG:
3616                 case OP_VCALL_REG:
3617                 case OP_VOIDCALL_REG:
3618                 case OP_CALL_REG: {
3619                         s390_lgr  (code, s390_r1, ins->sreg1);
3620                         s390_basr (code, s390_r14, s390_r1);
3621                 }
3622                         break;
3623                 case OP_FCALL_MEMBASE: {
3624                         call = (MonoCallInst*)ins;
3625                         s390_lg   (code, s390_r1, 0, ins->sreg1, ins->inst_offset);
3626                         s390_basr (code, s390_r14, s390_r1);
3627                         if (call->signature->ret->type == MONO_TYPE_R4)
3628                                 s390_ldebr (code, s390_f0, s390_f0);
3629                 }
3630                         break;
3631                 case OP_LCALL_MEMBASE:
3632                 case OP_VCALL_MEMBASE:
3633                 case OP_VOIDCALL_MEMBASE:
3634                 case OP_CALL_MEMBASE: {
3635                         s390_lg   (code, s390_r1, 0, ins->sreg1, ins->inst_offset);
3636                         s390_basr (code, s390_r14, s390_r1);
3637                 }
3638                         break;
3639                 case OP_OUTARG:
3640                         g_assert_not_reached ();
3641                         break;
3642                 case OP_LOCALLOC: {
3643                         int alloca_skip = S390_MINIMAL_STACK_SIZE + cfg->param_area;
3644                         int area_offset = S390_ALIGN(alloca_skip, S390_STACK_ALIGNMENT);
3645                         s390_lgr  (code, s390_r1, ins->sreg1);
3646                         if (ins->flags & MONO_INST_INIT)
3647                                 s390_lgr  (code, s390_r0, ins->sreg1);
3648                         s390_aghi (code, s390_r1, 14);
3649                         s390_srlg (code, s390_r1, s390_r1, 0, 3);
3650                         s390_sllg (code, s390_r1, s390_r1, 0, 3);
3651                         if (cfg->method->save_lmf) {
3652                                 /*----------------------------------*/
3653                                 /* we have to adjust lmf ebp value  */
3654                                 /*----------------------------------*/
3655                                 int lmfOffset = cfg->stack_usage - sizeof(MonoLMF);
3656
3657                                 s390_lgr (code, s390_r13, cfg->frame_reg);
3658                                 if (s390_is_uimm16(lmfOffset))
3659                                         s390_aghi (code, s390_r13, lmfOffset);
3660                                 else {
3661                                         s390_basr (code, s390_r14, 0);
3662                                         s390_j    (code, 4);
3663                                         s390_word (code, lmfOffset);
3664                                         s390_agf  (code, s390_r13, 0, s390_r14, 4);
3665                                 }
3666                                 s390_lgr (code, s390_r14, STK_BASE);
3667                                 s390_sgr (code, s390_r14, s390_r1);
3668                                 s390_stg (code, s390_r14, 0, s390_r13,
3669                                           G_STRUCT_OFFSET(MonoLMF, ebp));
3670                         }
3671                         s390_lg   (code, s390_r13, 0, STK_BASE, 0);
3672                         s390_sgr  (code, STK_BASE, s390_r1);
3673                         s390_stg  (code, s390_r13, 0, STK_BASE, 0);
3674                         s390_la   (code, ins->dreg, 0, STK_BASE, area_offset);
3675                         s390_srlg (code, ins->dreg, ins->dreg, 0, 3);
3676                         s390_sllg (code, ins->dreg, ins->dreg, 0, 3);
3677                         if (ins->flags & MONO_INST_INIT) {
3678                                 s390_lgr  (code, s390_r1, s390_r0);
3679                                 s390_lgr  (code, s390_r0, ins->dreg);
3680                                 s390_lgr  (code, s390_r14, s390_r12);
3681                                 s390_lghi (code, s390_r13, 0);
3682                                 s390_mvcle(code, s390_r0, s390_r12, 0, 0);
3683                                 s390_jo   (code, -2);
3684                                 s390_lgr  (code, s390_r12, s390_r14);
3685                         }
3686                 }
3687                         break;
3688                 case CEE_RET: {
3689                         s390_br  (code, s390_r14);
3690                 }
3691                         break;
3692                 case CEE_THROW: {
3693                         s390_lgr  (code, s390_r2, ins->sreg1);
3694                         s390_basr (code, s390_r13, 0);
3695                         s390_j    (code, 6);
3696                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD,
3697                                              (gpointer) "mono_arch_throw_exception");
3698                         s390_llong(code, 0);
3699                         s390_lg   (code, s390_r14, 0, s390_r13, 4);
3700                         s390_basr (code, s390_r14, s390_r14);
3701                 }
3702                         break;
3703                 case OP_RETHROW: {
3704                         s390_lgr  (code, s390_r2, ins->sreg1);
3705                         s390_basr (code, s390_r13, 0);
3706                         s390_j    (code, 6);
3707                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD,
3708                                              (gpointer) "mono_arch_rethrow_exception");
3709                         s390_llong(code, 0);
3710                         s390_lg   (code, s390_r14, 0, s390_r13, 4);
3711                         s390_basr (code, s390_r14, s390_r14);
3712                 }
3713                         break;
3714                 case OP_START_HANDLER: {
3715                         S390_LONG (code, stg, stg, s390_r14, 0,
3716                                    ins->inst_left->inst_basereg,
3717                                    ins->inst_left->inst_offset);
3718                 }
3719                         break;
3720                 case OP_ENDFILTER: {
3721                         if (ins->sreg1 != s390_r2)
3722                                 s390_lgr(code, s390_r2, ins->sreg1);
3723                         S390_LONG (code, lg, lg, s390_r14, 0,
3724                                    ins->inst_left->inst_basereg,
3725                                    ins->inst_left->inst_offset);
3726                         s390_br  (code, s390_r14);
3727                 }
3728                         break;
3729                 case CEE_ENDFINALLY: {
3730                         S390_LONG (code, lg, lg, s390_r14, 0,
3731                                    ins->inst_left->inst_basereg,
3732                                    ins->inst_left->inst_offset);
3733                         s390_br  (code, s390_r14);
3734                 }
3735                         break;
3736                 case OP_CALL_HANDLER: {
3737                         mono_add_patch_info (cfg, code-cfg->native_code,
3738                                              MONO_PATCH_INFO_BB, ins->inst_target_bb);
3739                         s390_brasl (code, s390_r14, 0);
3740                 }
3741                         break;
3742                 case OP_LABEL: {
3743                         ins->inst_c0 = code - cfg->native_code;
3744                 }
3745                         break;
3746                 case CEE_BR:
3747                         EMIT_UNCOND_BRANCH(ins);
3748                         break;
3749                 case OP_BR_REG: {
3750                         s390_br  (code, ins->sreg1);
3751                 }
3752                         break;
3753                 case OP_CEQ:
3754                 case OP_ICEQ: {
3755                         s390_lghi(code, ins->dreg, 1);
3756                         s390_jz  (code, 4);
3757                         s390_lghi(code, ins->dreg, 0);
3758                 }
3759                         break;
3760                 case OP_CLT:
3761                 case OP_ICLT: {
3762                         s390_lghi(code, ins->dreg, 1);
3763                         s390_jl  (code, 4);
3764                         s390_lghi(code, ins->dreg, 0);
3765                 }
3766                         break;
3767                 case OP_CLT_UN:
3768                 case OP_ICLT_UN: {
3769                         s390_lghi(code, ins->dreg, 1);
3770                         s390_jlo (code, 4);
3771                         s390_lghi(code, ins->dreg, 0);
3772                 }
3773                         break;
3774                 case OP_CGT:
3775                 case OP_ICGT: {
3776                         s390_lghi(code, ins->dreg, 1);
3777                         s390_jh  (code, 4);
3778                         s390_lghi(code, ins->dreg, 0);
3779                 }
3780                         break;
3781                 case OP_CGT_UN:
3782                 case OP_ICGT_UN: {
3783                         s390_lghi(code, ins->dreg, 1);
3784                         s390_jho (code, 4);
3785                         s390_lghi(code, ins->dreg, 0);
3786                 }
3787                         break;
3788                 case OP_COND_EXC_EQ:
3789                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_EQ, ins->inst_p1);
3790                         break;
3791                 case OP_COND_EXC_NE_UN:
3792                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NE, ins->inst_p1);
3793                         break;
3794                 case OP_COND_EXC_LT:
3795                 case OP_COND_EXC_LT_UN:
3796                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, ins->inst_p1);
3797                         break;
3798                 case OP_COND_EXC_GT:
3799                 case OP_COND_EXC_GT_UN:
3800                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GT, ins->inst_p1);
3801                         break;
3802                 case OP_COND_EXC_GE:
3803                 case OP_COND_EXC_GE_UN:
3804                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GE, ins->inst_p1);
3805                         break;
3806                 case OP_COND_EXC_LE:
3807                 case OP_COND_EXC_LE_UN:
3808                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LE, ins->inst_p1);
3809                         break;
3810                 case OP_COND_EXC_OV:
3811                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, ins->inst_p1);
3812                         break;
3813                 case OP_COND_EXC_NO:
3814                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NO, ins->inst_p1);
3815                         break;
3816                 case OP_COND_EXC_C:
3817                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, ins->inst_p1);
3818                         break;
3819                 case OP_COND_EXC_NC:
3820                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, ins->inst_p1);
3821                         break;
3822                 case CEE_BEQ:
3823                 case OP_IBEQ:
3824                         EMIT_COND_BRANCH (ins, S390_CC_EQ);
3825                         break;
3826                 case CEE_BNE_UN:
3827                 case OP_IBNE_UN:
3828                         EMIT_COND_BRANCH (ins, S390_CC_NE);
3829                         break;
3830                 case CEE_BLT:
3831                 case CEE_BLT_UN:
3832                 case OP_IBLT:
3833                 case OP_IBLT_UN:
3834                         EMIT_COND_BRANCH (ins, S390_CC_LT);
3835                         break;
3836                 case CEE_BGT:
3837                 case CEE_BGT_UN:
3838                 case OP_IBGT:
3839                 case OP_IBGT_UN:
3840                         EMIT_COND_BRANCH (ins, S390_CC_GT);
3841                         break;
3842                 case CEE_BGE:
3843                 case CEE_BGE_UN:
3844                 case OP_IBGE:
3845                 case OP_IBGE_UN:
3846                         EMIT_COND_BRANCH (ins, S390_CC_GE);
3847                         break;
3848                 case CEE_BLE:
3849                 case CEE_BLE_UN:
3850                 case OP_IBLE:
3851                 case OP_IBLE_UN:
3852                         EMIT_COND_BRANCH (ins, S390_CC_LE);
3853                         break;
3854
3855                 /* floating point opcodes */
3856                 case OP_R8CONST: {
3857                         if (*((float *) ins->inst_p0) == 0) {
3858                                 s390_lzdr (code, ins->dreg);
3859                         } else {
3860                                 s390_basr  (code, s390_r13, 0);
3861                                 s390_j     (code, 6);
3862                                 s390_llong (code, ins->inst_p0);
3863                                 s390_lg    (code, s390_r13, 0, s390_r13, 4);
3864                                 s390_ld    (code, ins->dreg, 0, s390_r13, 0);
3865                         }
3866                 }
3867                         break;
3868                 case OP_R4CONST: {
3869                         if (*((float *) ins->inst_p0) == 0) {
3870                                 s390_lzdr (code, ins->dreg);
3871                         } else {
3872                                 s390_basr (code, s390_r13, 0);
3873                                 s390_j    (code, 6);
3874                                 s390_llong(code, ins->inst_p0);
3875                                 s390_lg   (code, s390_r13, 0, s390_r13, 4);
3876                                 s390_ldeb (code, ins->dreg, 0, s390_r13, 0);
3877                         }
3878                 }
3879                         break;
3880                 case OP_STORER8_MEMBASE_REG: {
3881                         S390_LONG (code, stdy, std, ins->sreg1, 0,
3882                                    ins->inst_destbasereg, ins->inst_offset);
3883                 }
3884                         break;
3885                 case OP_LOADR8_MEMBASE: {
3886                         S390_LONG (code, ldy, ld, ins->dreg, 0,
3887                                    ins->inst_basereg, ins->inst_offset);
3888                 }
3889                         break;
3890                 case OP_STORER4_MEMBASE_REG: {
3891                         s390_ledbr (code, s390_f15, ins->sreg1);
3892                         S390_LONG (code, stey, ste, s390_f15, 0,
3893                                    ins->inst_destbasereg, ins->inst_offset);
3894                 }
3895                         break;
3896                 case OP_LOADR4_MEMBASE: {
3897                         S390_LONG (code, ldy, ld, s390_f15, 0,
3898                                    ins->inst_basereg, ins->inst_offset);
3899                         s390_ldebr (code, ins->dreg, s390_f15);
3900                 }
3901                         break;
3902                 case CEE_CONV_R_UN: {
3903                         s390_cdgbr (code, ins->dreg, ins->sreg1);
3904                         s390_ltgr  (code, ins->sreg1, ins->sreg1);
3905                         s390_jnl   (code, 12);
3906                         s390_basr  (code, s390_r13, 0);
3907                         s390_j     (code, 6);
3908                         s390_word  (code, 0x41f00000);
3909                         s390_word  (code, 0);
3910                         s390_adb   (code, ins->dreg, 0, s390_r13, 4);
3911                 }
3912                         break;
3913                 case OP_LCONV_TO_R4:
3914                 case CEE_CONV_R4: {
3915                         s390_cdgbr (code, ins->dreg, ins->sreg1);
3916                 }
3917                         break;
3918                 case OP_LCONV_TO_R8:
3919                 case CEE_CONV_R8: {
3920                         s390_cdgbr (code, ins->dreg, ins->sreg1);
3921                 }
3922                         break;
3923                 case OP_FCONV_TO_I1:
3924                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 1, TRUE);
3925                         break;
3926                 case OP_FCONV_TO_U1:
3927                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 1, FALSE);
3928                         break;
3929                 case OP_FCONV_TO_I2:
3930                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 2, TRUE);
3931                         break;
3932                 case OP_FCONV_TO_U2:
3933                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 2, FALSE);
3934                         break;
3935                 case OP_FCONV_TO_I4:
3936                 case OP_FCONV_TO_I:
3937                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 4, TRUE);
3938                         break;
3939                 case OP_FCONV_TO_U4:
3940                 case OP_FCONV_TO_U:
3941                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 4, FALSE);
3942                         break;
3943                 case OP_FCONV_TO_I8:
3944                         s390_cgdbr (code, ins->dreg, 5, ins->sreg1);
3945                         break;
3946                 case OP_FCONV_TO_U8:
3947                         g_assert_not_reached ();
3948                         /* Implemented as helper calls */
3949                         break;
3950                 case OP_LCONV_TO_R_UN:
3951                         g_assert_not_reached ();
3952                         /* Implemented as helper calls */
3953                         break;
3954                 case OP_LCONV_TO_OVF_I: {
3955                         /* Valid ints: 0xffffffff:8000000 to 00000000:0x7f000000 */
3956                         short int *o[5];
3957                         s390_ltgr (code, ins->sreg2, ins->sreg2);
3958                         s390_jnl  (code, 0); CODEPTR(code, o[0]);
3959                         s390_ltgr (code, ins->sreg1, ins->sreg1);
3960                         s390_jnl  (code, 0); CODEPTR(code, o[1]);
3961                         s390_lhi  (code, s390_r13, -1);
3962                         s390_cgr  (code, ins->sreg1, s390_r13);
3963                         s390_jnz  (code, 0); CODEPTR(code, o[2]);
3964                         if (ins->dreg != ins->sreg2)
3965                                 s390_lgr  (code, ins->dreg, ins->sreg2);
3966                         s390_j    (code, 0); CODEPTR(code, o[3]);
3967                         PTRSLOT(code, o[0]);
3968                         s390_jz   (code, 0); CODEPTR(code, o[4]);
3969                         PTRSLOT(code, o[1]);
3970                         PTRSLOT(code, o[2]);
3971                         mono_add_patch_info (cfg, code - cfg->native_code,
3972                                              MONO_PATCH_INFO_EXC, "OverflowException");
3973                         s390_brasl (code, s390_r14, 0);
3974                         PTRSLOT(code, o[3]);
3975                         PTRSLOT(code, o[4]);
3976                 }
3977                         break;
3978                 case OP_ABS: {
3979                         s390_lpdbr (code, ins->dreg, ins->sreg1);
3980                 }
3981                         break;
3982                 case OP_SQRT: {
3983                         s390_sqdbr (code, ins->dreg, ins->sreg1);
3984                 }
3985                         break;
3986                 case OP_FADD: {
3987                         CHECK_SRCDST_COM_F;
3988                         s390_adbr (code, ins->dreg, src2);
3989                 }
3990                         break;
3991                 case OP_FSUB: {
3992                         CHECK_SRCDST_NCOM_F;
3993                         s390_sdbr (code, ins->dreg, src2);
3994                 }
3995                         break;
3996                 case OP_FMUL: {
3997                         CHECK_SRCDST_COM_F;
3998                         s390_mdbr (code, ins->dreg, src2);
3999                 }
4000                         break;
4001                 case OP_FDIV: {
4002                         CHECK_SRCDST_NCOM_F;
4003                         s390_ddbr (code, ins->dreg, src2);
4004                 }
4005                         break;
4006                 case OP_FNEG: {
4007                         s390_lcdbr (code, ins->dreg, ins->sreg1);
4008                 }
4009                         break;
4010                 case OP_FREM: {
4011                         CHECK_SRCDST_NCOM_F;
4012                         s390_didbr (code, ins->dreg, src2, 5, s390_f15);
4013                 }
4014                         break;
4015                 case OP_FCOMPARE: {
4016                         s390_cdbr (code, ins->sreg1, ins->sreg2);
4017                 }
4018                         break;
4019                 case OP_FCEQ: {
4020                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4021                         s390_lghi  (code, ins->dreg, 1);
4022                         s390_je    (code, 4);
4023                         s390_lghi  (code, ins->dreg, 0);
4024                 }
4025                         break;
4026                 case OP_FCLT: {
4027                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4028                         s390_lghi  (code, ins->dreg, 1);
4029                         s390_jl    (code, 4);
4030                         s390_lghi  (code, ins->dreg, 0);
4031                 }
4032                         break;
4033                 case OP_FCLT_UN: {
4034                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4035                         s390_lghi  (code, ins->dreg, 1);
4036                         s390_jlo   (code, 4);
4037                         s390_lghi  (code, ins->dreg, 0);
4038                 }
4039                         break;
4040                 case OP_FCGT: {
4041                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4042                         s390_lghi  (code, ins->dreg, 1);
4043                         s390_jh    (code, 4);
4044                         s390_lghi  (code, ins->dreg, 0);
4045                 }
4046                         break;
4047                 case OP_FCGT_UN: {
4048                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4049                         s390_lghi  (code, ins->dreg, 1);
4050                         s390_jho   (code, 4);
4051                         s390_lghi  (code, ins->dreg, 0);
4052                 }
4053                         break;
4054                 case OP_FBEQ: {
4055                         short *o;
4056                         s390_jo (code, 0); CODEPTR(code, o);
4057                         EMIT_COND_BRANCH (ins, S390_CC_EQ);
4058                         PTRSLOT (code, o);
4059                 }
4060                         break;
4061                 case OP_FBNE_UN:
4062                         EMIT_COND_BRANCH (ins, S390_CC_NE|S390_CC_OV);
4063                         break;
4064                 case OP_FBLT: {
4065                         short *o;
4066                         s390_jo (code, 0); CODEPTR(code, o);
4067                         EMIT_COND_BRANCH (ins, S390_CC_LT);
4068                         PTRSLOT (code, o);
4069                 }
4070                         break;
4071                 case OP_FBLT_UN:
4072                         EMIT_COND_BRANCH (ins, S390_CC_LT|S390_CC_OV);
4073                         break;
4074                 case OP_FBGT: {
4075                         short *o;
4076                         s390_jo (code, 0); CODEPTR(code, o);
4077                         EMIT_COND_BRANCH (ins, S390_CC_GT);
4078                         PTRSLOT (code, o);
4079                 }
4080                         break;
4081                 case OP_FBGT_UN:
4082                         EMIT_COND_BRANCH (ins, S390_CC_GT|S390_CC_OV);
4083                         break;
4084                 case OP_FBGE: {
4085                         short *o;
4086                         s390_jo (code, 0); CODEPTR(code, o);
4087                         EMIT_COND_BRANCH (ins, S390_CC_GE);
4088                         PTRSLOT (code, o);
4089                 }
4090                         break;
4091                 case OP_FBGE_UN:
4092                         EMIT_COND_BRANCH (ins, S390_CC_GE|S390_CC_OV);
4093                         break;
4094                 case OP_FBLE: {
4095                         short *o;
4096                         s390_jo (code, 0); CODEPTR(code, o);
4097                         EMIT_COND_BRANCH (ins, S390_CC_LE);
4098                         PTRSLOT (code, o);
4099                 }
4100                         break;
4101                 case OP_FBLE_UN:
4102                         EMIT_COND_BRANCH (ins, S390_CC_LE|S390_CC_OV);
4103                         break;
4104                 case CEE_CKFINITE: {
4105                         short *o;
4106                         s390_lhi  (code, s390_r13, 0x7f);
4107                         s390_tcdb (code, ins->sreg1, 0, s390_r13, 0);
4108                         s390_jz   (code, 0); CODEPTR(code, o);
4109                         mono_add_patch_info (cfg, code - cfg->native_code,
4110                                              MONO_PATCH_INFO_EXC, "ArithmeticException");
4111                         s390_brasl (code, s390_r14,0);
4112                         PTRSLOT(code, o);
4113                 }
4114                         break;
4115                 case OP_S390_MOVE: {
4116                         if (ins->backend.size > 0) {
4117                                 if (ins->backend.size <= 256) {
4118                                         s390_mvc  (code, ins->backend.size, ins->dreg,
4119                                                    ins->inst_offset, ins->sreg1, ins->inst_imm);
4120                                 } else {
4121                                         s390_lgr  (code, s390_r0, ins->dreg);
4122                                         if (s390_is_imm16 (ins->inst_offset)) {
4123                                                 s390_aghi (code, s390_r0, ins->inst_offset);
4124                                         } else {
4125                                                 s390_basr (code, s390_r13, 0);
4126                                                 s390_j    (code, 6);
4127                                                 s390_llong(code, ins->inst_offset);
4128                                                 s390_a    (code, s390_r0, 0, s390_r13, 4);
4129                                         }
4130                                         s390_lgr  (code, s390_r12, ins->sreg1);
4131                                         if (s390_is_imm16 (ins->inst_imm)) {
4132                                                 s390_aghi (code, s390_r12, ins->inst_imm);
4133                                         } else {
4134                                                 s390_basr (code, s390_r13, 0);
4135                                                 s390_j    (code, 6);
4136                                                 s390_llong(code, ins->inst_imm);
4137                                                 s390_ag   (code, s390_r12, 0, s390_r13, 4);
4138                                         }
4139                                         s390_lgr  (code, s390_r1, ins->sreg1);
4140                                         s390_lgr  (code, s390_r13, s390_r1);
4141                                         s390_mvcle(code, s390_r0, s390_r12, 0, 0);
4142                                         s390_jo   (code, -2);
4143                                 }
4144                         }
4145                 }
4146                         break;
4147                 case OP_ATOMIC_ADD_I8: {
4148                         s390_lgr (code, s390_r1, ins->sreg2);
4149                         s390_lg  (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4150                         s390_agr (code, s390_r1, s390_r0);
4151                         s390_csg (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
4152                         s390_jnz (code, -10);
4153                         s390_lgr (code, ins->dreg, s390_r1);
4154                 }
4155                         break;
4156                 case OP_ATOMIC_ADD_NEW_I8: {
4157                         s390_lgr (code, s390_r1, ins->sreg2);
4158                         s390_lg  (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4159                         s390_agr (code, s390_r1, s390_r0);
4160                         s390_csg (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
4161                         s390_jnz (code, -10);
4162                         s390_lgr (code, ins->dreg, s390_r1);
4163                 }
4164                         break;
4165                 case OP_ATOMIC_EXCHANGE_I8: {
4166                         s390_lg  (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4167                         s390_csg (code, s390_r0, ins->sreg2, ins->inst_basereg, ins->inst_offset);
4168                         s390_jnz (code, -6);
4169                         s390_lgr (code, ins->dreg, s390_r0);
4170                 }
4171                         break;
4172                 case OP_ATOMIC_ADD_I4: {
4173                         s390_lgfr(code, s390_r1, ins->sreg2);
4174                         s390_lgf (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4175                         s390_agr (code, s390_r1, s390_r0);
4176                         s390_cs  (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
4177                         s390_jnz (code, -9);
4178                         s390_lgfr(code, ins->dreg, s390_r1);
4179                 }
4180                         break;
4181                 case OP_ATOMIC_ADD_NEW_I4: {
4182                         s390_lgfr(code, s390_r1, ins->sreg2);
4183                         s390_lgf (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4184                         s390_agr (code, s390_r1, s390_r0);
4185                         s390_cs  (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
4186                         s390_jnz (code, -9);
4187                         s390_lgfr(code, ins->dreg, s390_r1);
4188                 }
4189                         break;
4190                 case OP_ATOMIC_EXCHANGE_I4: {
4191                         s390_lg  (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4192                         s390_cs  (code, s390_r0, ins->sreg2, ins->inst_basereg, ins->inst_offset);
4193                         s390_jnz (code, -4);
4194                         s390_lgfr(code, ins->dreg, s390_r0);
4195                 }
4196                         break;
4197                 case OP_S390_BKCHAIN: {
4198                         s390_lgr  (code, ins->dreg, ins->sreg1);
4199                         if (s390_is_imm16 (cfg->stack_offset)) {
4200                                 s390_aghi (code, ins->dreg, cfg->stack_offset);
4201                         } else {
4202                                 s390_basr (code, s390_r13, 0);
4203                                 s390_j    (code, 6);
4204                                 s390_llong(code, cfg->stack_offset);
4205                                 s390_ag   (code, ins->dreg, 0, s390_r13, 4);
4206                         }
4207                 }
4208                         break;
4209                 case OP_MEMORY_BARRIER: {
4210                 }
4211                         break;
4212                 default:
4213                         g_warning ("unknown opcode %s in %s()\n", mono_inst_name (ins->opcode), __FUNCTION__);
4214                         g_assert_not_reached ();
4215                 }
4216
4217                 if ((cfg->opt & MONO_OPT_BRANCH) && ((code - cfg->native_code - offset) > max_len)) {
4218                         g_warning ("wrong maximal instruction length of instruction %s (expected %d, got %ld)",
4219                                    mono_inst_name (ins->opcode), max_len, code - cfg->native_code - offset);
4220                         g_assert_not_reached ();
4221                 }
4222
4223                 cpos += max_len;
4224
4225                 last_ins = ins;
4226                 last_offset = offset;
4227
4228                 ins = ins->next;
4229         }
4230
4231         cfg->code_len = code - cfg->native_code;
4232 }
4233
4234 /*========================= End of Function ========================*/
4235
4236 /*------------------------------------------------------------------*/
4237 /*                                                                  */
4238 /* Name         - mono_arch_register_lowlevel_calls                 */
4239 /*                                                                  */
4240 /* Function     - Register routines to help with --trace operation. */
4241 /*                                                                  */
4242 /*------------------------------------------------------------------*/
4243
4244 void
4245 mono_arch_register_lowlevel_calls (void)
4246 {
4247         mono_register_jit_icall (mono_arch_break, "mono_arch_break", NULL, TRUE);
4248         mono_register_jit_icall (mono_arch_get_lmf_addr, "mono_arch_get_lmf_addr", NULL, TRUE);
4249 }
4250
4251 /*========================= End of Function ========================*/
4252
4253 /*------------------------------------------------------------------*/
4254 /*                                                                  */
4255 /* Name         - mono_arch_break                                   */
4256 /*                                                                  */
4257 /* Function     - Process a "break" operation for debugging.        */
4258 /*                                                                  */
4259 /*------------------------------------------------------------------*/
4260
4261 static void
4262 mono_arch_break(void) {
4263 }
4264
4265 /*========================= End of Function ========================*/
4266
4267 /*------------------------------------------------------------------*/
4268 /*                                                                  */
4269 /* Name         - mono_arch_patch_code                              */
4270 /*                                                                  */
4271 /* Function     - Process the patch data created during the         */
4272 /*                instruction build process. This resolves jumps,   */
4273 /*                calls, variables etc.                             */
4274 /*                                                                  */
4275 /*------------------------------------------------------------------*/
4276
4277 void
4278 mono_arch_patch_code (MonoMethod *method, MonoDomain *domain,
4279                       guint8 *code, MonoJumpInfo *ji, gboolean run_cctors)
4280 {
4281         MonoJumpInfo *patch_info;
4282
4283         for (patch_info = ji; patch_info; patch_info = patch_info->next) {
4284                 unsigned char *ip = patch_info->ip.i + code;
4285                 gconstpointer target = NULL;
4286
4287                 target = mono_resolve_patch_target (method, domain, code,
4288                                                     patch_info, run_cctors);
4289
4290                 switch (patch_info->type) {
4291                         case MONO_PATCH_INFO_IP:
4292                         case MONO_PATCH_INFO_EXC_NAME:
4293                         case MONO_PATCH_INFO_LDSTR:
4294                         case MONO_PATCH_INFO_TYPE_FROM_HANDLE:
4295                         case MONO_PATCH_INFO_LDTOKEN:
4296                         case MONO_PATCH_INFO_EXC:
4297                         case MONO_PATCH_INFO_ABS:
4298                         case MONO_PATCH_INFO_METHOD:
4299                         case MONO_PATCH_INFO_INTERNAL_METHOD:
4300                         case MONO_PATCH_INFO_CLASS_INIT:
4301                                 s390_patch_addr (ip, (guint64) target);
4302                                 continue;
4303                         case MONO_PATCH_INFO_SWITCH:
4304                                 /*----------------------------------*/
4305                                 /* ip points at the basr r13,0/j +4 */
4306                                 /* instruction the vtable value     */
4307                                 /* follows this (i.e. ip+6)         */
4308                                 /*----------------------------------*/
4309                                 *((gconstpointer *)(ip+6)) = target;
4310                                 continue;
4311                         case MONO_PATCH_INFO_METHODCONST:
4312                         case MONO_PATCH_INFO_CLASS:
4313                         case MONO_PATCH_INFO_IMAGE:
4314                         case MONO_PATCH_INFO_FIELD:
4315                         case MONO_PATCH_INFO_IID:
4316                                 target = S390_RELATIVE(target, ip);
4317                                 s390_patch_rel (ip, (guint64) target);
4318                                 continue;
4319                         case MONO_PATCH_INFO_R4:
4320                         case MONO_PATCH_INFO_R8:
4321                         case MONO_PATCH_INFO_METHOD_REL:
4322                                 g_assert_not_reached ();
4323                                 continue;
4324                         default:
4325                                 target = S390_RELATIVE(target, ip);
4326                                 ip += 2;
4327                                 s390_patch_rel (ip, (guint64) target);
4328                 }
4329         }
4330 }
4331
4332 /*========================= End of Function ========================*/
4333
4334 /*------------------------------------------------------------------*/
4335 /*                                                                  */
4336 /* Name         - emit_load_volatile_registers                      */
4337 /*                                                                  */
4338 /* Function     - Emit the instructions to reload parameter regist- */
4339 /*                registers for use with "tail" operations.         */
4340 /*                                                                  */
4341 /*                The register loading operations performed here    */
4342 /*                are the mirror of the store operations performed  */
4343 /*                in mono_arch_emit_prolog and need to be kept in   */
4344 /*                synchronization with it.                          */
4345 /*                                                                  */
4346 /*------------------------------------------------------------------*/
4347
4348 guint8 *
4349 emit_load_volatile_registers (guint8 *code, MonoCompile *cfg)
4350 {
4351         MonoInst *inst;
4352         MonoMethod *method = cfg->method;
4353         MonoMethodSignature *sig = mono_method_signature(method);
4354         int pos = 0, i;
4355         CallInfo *cinfo;
4356         size_data sz;
4357
4358         cinfo = calculate_sizes (sig, &sz, sig->pinvoke);
4359
4360         if (cinfo->struct_ret) {
4361                 ArgInfo *ainfo = &cinfo->ret;
4362                 inst         = cfg->ret;
4363                 s390_lg (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4364         }
4365
4366         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
4367                 ArgInfo *ainfo = cinfo->args + i;
4368                 inst = cfg->varinfo [pos];
4369
4370                 if (inst->opcode == OP_REGVAR) {
4371                         if (ainfo->regtype == RegTypeGeneral)
4372                                 s390_lgr (code, ainfo->reg, inst->dreg);
4373                         else if (ainfo->regtype == RegTypeFP) {
4374                                 if (inst->dreg != ainfo->reg) {
4375                                         if (ainfo->size == 4) {
4376                                                 s390_ldebr (code, ainfo->reg, inst->dreg);
4377                                         } else {
4378                                                 s390_ldr   (code, ainfo->reg, inst->dreg);
4379                                         }
4380                                 }
4381                         }
4382                         else if (ainfo->regtype == RegTypeBase) {
4383                         } else
4384                                 g_assert_not_reached ();
4385                 } else {
4386                         if (ainfo->regtype == RegTypeGeneral) {
4387                                 if (!((ainfo->reg >= 2) && (ainfo->reg <= 6)))
4388                                         g_assert_not_reached();
4389                                 switch (ainfo->size) {
4390                                 case 1:
4391                                         s390_llgc (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4392                                         break;
4393                                 case 2:
4394                                         s390_lgh  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4395                                         break;
4396                                 case 4:
4397                                         s390_lgf (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4398                                         break;
4399                                 case 8:
4400                                         s390_lg  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4401                                         break;
4402                                 }
4403                         } else if (ainfo->regtype == RegTypeBase) {
4404                         } else if (ainfo->regtype == RegTypeFP) {
4405                                 if (ainfo->size == 8)
4406                                         s390_ld  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4407                                 else if (ainfo->size == 4)
4408                                         s390_le  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4409                                 else
4410                                         g_assert_not_reached ();
4411                         } else if (ainfo->regtype == RegTypeStructByVal) {
4412                                 if (ainfo->reg != STK_BASE) {
4413                                         switch (ainfo->size) {
4414                                         case 1:
4415                                                 s390_llgc (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4416                                                 break;
4417                                         case 2:
4418                                                 s390_lgh (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4419                                                 break;
4420                                         case 4:
4421                                                 s390_lgf (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4422                                                 break;
4423                                         case 8:
4424                                                 s390_lg  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4425                                                 break;
4426                                         }
4427                                 }
4428                         } else if (ainfo->regtype == RegTypeStructByAddr) {
4429                                 if (ainfo->reg != STK_BASE) {
4430                                         s390_lg (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4431                                 }
4432                         } else
4433                                 g_assert_not_reached ();
4434                 }
4435                 pos++;
4436         }
4437
4438         g_free (cinfo);
4439
4440         return code;
4441 }
4442
4443 /*========================= End of Function ========================*/
4444
4445 /*------------------------------------------------------------------*/
4446 /*                                                                  */
4447 /* Name         - mono_arch_emit_prolog                             */
4448 /*                                                                  */
4449 /* Function     - Create the instruction sequence for a function    */
4450 /*                prolog.                                           */
4451 /*                                                                  */
4452 /*------------------------------------------------------------------*/
4453
4454 guint8 *
4455 mono_arch_emit_prolog (MonoCompile *cfg)
4456 {
4457         MonoMethod *method = cfg->method;
4458         MonoBasicBlock *bb;
4459         MonoMethodSignature *sig;
4460         MonoInst *inst;
4461         int alloc_size, pos, max_offset, i;
4462         guint8 *code;
4463         CallInfo *cinfo;
4464         size_data sz;
4465         int tracing = 0;
4466         int lmfOffset;
4467
4468         cfg->code_size   = 512;
4469
4470         if (mono_jit_trace_calls != NULL && mono_trace_eval (method)) {
4471                 tracing         = 1;
4472                 cfg->code_size += 256;
4473         }
4474
4475         if (method->save_lmf)
4476                 cfg->code_size += 200;
4477
4478         cfg->native_code = code = g_malloc (cfg->code_size);
4479
4480         s390_stmg (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
4481
4482         if (cfg->flags & MONO_CFG_HAS_ALLOCA) {
4483                 cfg->used_int_regs |= 1 << 11;
4484         }
4485
4486         alloc_size = cfg->stack_offset;
4487
4488         cfg->stack_usage = alloc_size;
4489         s390_lgr  (code, s390_r11, STK_BASE);
4490         if (s390_is_uimm16 (alloc_size)) {
4491                 s390_aghi (code, STK_BASE, -alloc_size);
4492         } else {
4493                 int stackSize = alloc_size;
4494                 while (stackSize > 32767) {
4495                         s390_aghi (code, STK_BASE, -32767);
4496                         stackSize -= 32767;
4497                 }
4498                 s390_aghi (code, STK_BASE, -stackSize);
4499         }
4500         s390_stg  (code, s390_r11, 0, STK_BASE, 0);
4501
4502         if (cfg->frame_reg != STK_BASE)
4503                 s390_lgr (code, s390_r11, STK_BASE);
4504
4505         /* compute max_offset in order to use short forward jumps
4506          * we always do it on s390 because the immediate displacement
4507          * for jumps is too small
4508          */
4509         max_offset = 0;
4510         for (bb = cfg->bb_entry; bb; bb = bb->next_bb) {
4511                 MonoInst *ins = bb->code;
4512                 bb->max_offset = max_offset;
4513
4514                 if (cfg->prof_options & MONO_PROFILE_COVERAGE)
4515                         max_offset += 6;
4516
4517                 while (ins) {
4518                         max_offset += ((guint8 *)ins_get_spec (ins->opcode))[MONO_INST_LEN];
4519                         ins = ins->next;
4520                 }
4521         }
4522
4523         /* load arguments allocated to register from the stack */
4524         sig = mono_method_signature (method);
4525         pos = 0;
4526
4527         cinfo = calculate_sizes (sig, &sz, sig->pinvoke);
4528
4529         if (cinfo->struct_ret) {
4530                 ArgInfo *ainfo = &cinfo->ret;
4531                 inst         = cfg->ret;
4532                 inst->backend.size = ainfo->vtsize;
4533                 s390_stg (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4534         }
4535
4536         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
4537                 ArgInfo *ainfo = cinfo->args + i;
4538                 inst = cfg->varinfo [pos];
4539
4540                 if (inst->opcode == OP_REGVAR) {
4541                         if (ainfo->regtype == RegTypeGeneral)
4542                                 s390_lgr (code, inst->dreg, ainfo->reg);
4543                         else if (ainfo->regtype == RegTypeFP) {
4544                                 if (inst->dreg != ainfo->reg) {
4545                                         if (ainfo->size == 4) {
4546                                                 s390_ledbr (code, inst->dreg, ainfo->reg);
4547                                         } else {
4548                                                 s390_ldr   (code, inst->dreg, ainfo->reg);
4549                                         }
4550                                 }
4551                         }
4552                         else if (ainfo->regtype == RegTypeBase) {
4553                                 s390_lgr  (code, s390_r13, STK_BASE);
4554                                 s390_aghi (code, s390_r13, alloc_size);
4555                                 s390_lg   (code, inst->dreg, 0, s390_r13, ainfo->offset);
4556                         } else
4557                                 g_assert_not_reached ();
4558
4559                         if (cfg->verbose_level > 2)
4560                                 g_print ("Argument %d assigned to register %s\n",
4561                                          pos, mono_arch_regname (inst->dreg));
4562                 } else {
4563                         if (ainfo->regtype == RegTypeGeneral) {
4564                                 if (!((ainfo->reg >= 2) && (ainfo->reg <= 6)))
4565                                         g_assert_not_reached();
4566                                 switch (ainfo->size) {
4567                                 case 1:
4568                                         s390_stc (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4569                                         break;
4570                                 case 2:
4571                                         s390_sth (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4572                                         break;
4573                                 case 4:
4574                                         s390_st (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4575                                         break;
4576                                 case 8:
4577                                         s390_stg (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4578                                         break;
4579                                 }
4580                         } else if (ainfo->regtype == RegTypeBase) {
4581                         } else if (ainfo->regtype == RegTypeFP) {
4582                                 if (ainfo->size == 8)
4583                                         s390_std (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4584                                 else if (ainfo->size == 4)
4585                                         s390_ste (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4586                                 else
4587                                         g_assert_not_reached ();
4588                         } else if (ainfo->regtype == RegTypeStructByVal) {
4589                                 int doffset = inst->inst_offset;
4590                                 int reg;
4591                                 if (ainfo->reg != STK_BASE)
4592                                         reg = ainfo->reg;
4593                                 else {
4594                                         reg = s390_r0;
4595                                         s390_lgr  (code, s390_r13, STK_BASE);
4596                                         s390_aghi (code, s390_r13, alloc_size);
4597                                 }
4598                                 switch (ainfo->size) {
4599                                         case 1:
4600                                                 if (ainfo->reg == STK_BASE)
4601                                                         s390_ic (code, reg, 0, s390_r13, ainfo->offset+7);
4602                                                 s390_stc (code, reg, 0, inst->inst_basereg, doffset);
4603                                                 break;
4604                                         case 2:
4605                                                 if (ainfo->reg == STK_BASE)
4606                                                         s390_lh (code, reg, 0, s390_r13, ainfo->offset+6);
4607                                                 s390_sth (code, reg, 0, inst->inst_basereg, doffset);
4608                                                 break;
4609                                         case 4:
4610                                                 if (ainfo->reg == STK_BASE)
4611                                                         s390_l  (code, reg, 0, s390_r13, ainfo->offset+4);
4612                                                 s390_st (code, reg, 0, inst->inst_basereg, doffset);
4613                                                 break;
4614                                         case 8:
4615                                                 if (ainfo->reg == STK_BASE)
4616                                                         s390_lg  (code, reg, 0, s390_r13, ainfo->offset);
4617                                                 s390_stg (code, reg, 0, inst->inst_basereg, doffset);
4618                                                 break;
4619                                 }
4620                         } else if (ainfo->regtype == RegTypeStructByAddr) {
4621                                 s390_stg (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4622                         } else
4623                                 g_assert_not_reached ();
4624                 }
4625                 pos++;
4626         }
4627
4628         if (method->save_lmf) {
4629                 /*---------------------------------------------------------------*/
4630                 /* we build the MonoLMF structure on the stack - see mini-s390.h */
4631                 /*---------------------------------------------------------------*/
4632                 lmfOffset = alloc_size - sizeof(MonoLMF);
4633
4634                 s390_lgr   (code, s390_r13, cfg->frame_reg);
4635                 s390_aghi  (code, s390_r13, lmfOffset);
4636
4637                 /*---------------------------------------------------------------*/
4638                 /* Preserve the parameter registers while we fix up the lmf      */
4639                 /*---------------------------------------------------------------*/
4640                 s390_stmg  (code, s390_r2, s390_r6, s390_r13,
4641                             G_STRUCT_OFFSET(MonoLMF, pregs[0]));
4642
4643                 /*---------------------------------------------------------------*/
4644                 /* On return from this call r2 have the address of the &lmf      */
4645                 /*---------------------------------------------------------------*/
4646                 s390_basr(code, s390_r10, 0);
4647                 s390_j   (code, 6);
4648                 mono_add_patch_info (cfg, code - cfg->native_code,
4649                                      MONO_PATCH_INFO_INTERNAL_METHOD,
4650                                      (gpointer)"mono_get_lmf_addr");
4651                 s390_llong(code, 0);
4652                 s390_lg   (code, s390_r1, 0, s390_r10, 4);
4653                 s390_basr (code, s390_r14, s390_r1);
4654
4655                 /*---------------------------------------------------------------*/
4656                 /* Set lmf.lmf_addr = jit_tls->lmf                               */
4657                 /*---------------------------------------------------------------*/
4658                 s390_stg   (code, s390_r2, 0, s390_r13,
4659                             G_STRUCT_OFFSET(MonoLMF, lmf_addr));
4660
4661                 /*---------------------------------------------------------------*/
4662                 /* Get current lmf                                               */
4663                 /*---------------------------------------------------------------*/
4664                 s390_lg    (code, s390_r0, 0, s390_r2, 0);
4665
4666                 /*---------------------------------------------------------------*/
4667                 /* Set our lmf as the current lmf                                */
4668                 /*---------------------------------------------------------------*/
4669                 s390_stg   (code, s390_r13, 0, s390_r2, 0);
4670
4671                 /*---------------------------------------------------------------*/
4672                 /* Have our lmf.previous_lmf point to the last lmf               */
4673                 /*---------------------------------------------------------------*/
4674                 s390_stg   (code, s390_r0, 0, s390_r13,
4675                             G_STRUCT_OFFSET(MonoLMF, previous_lmf));
4676
4677                 /*---------------------------------------------------------------*/
4678                 /* save method info                                              */
4679                 /*---------------------------------------------------------------*/
4680                 s390_basr  (code, s390_r1, 0);
4681                 s390_j     (code, 6);
4682                 s390_llong (code, method);
4683                 s390_lg    (code, s390_r1, 0, s390_r1, 4);
4684                 s390_stg   (code, s390_r1, 0, s390_r13,
4685                             G_STRUCT_OFFSET(MonoLMF, method));
4686
4687                 /*---------------------------------------------------------------*/
4688                 /* save the current IP                                           */
4689                 /*---------------------------------------------------------------*/
4690                 s390_stg   (code, STK_BASE, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, ebp));
4691                 s390_basr  (code, s390_r1, 0);
4692                 s390_stg   (code, s390_r1, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, eip));
4693
4694                 /*---------------------------------------------------------------*/
4695                 /* Save general and floating point registers                     */
4696                 /*---------------------------------------------------------------*/
4697                 s390_stmg  (code, s390_r2, s390_r12, s390_r13,
4698                             G_STRUCT_OFFSET(MonoLMF, gregs[2]));
4699                 for (i = 0; i < 16; i++) {
4700                         s390_std  (code, i, 0, s390_r13,
4701                                    G_STRUCT_OFFSET(MonoLMF, fregs[i]));
4702                 }
4703
4704                 /*---------------------------------------------------------------*/
4705                 /* Restore the parameter registers now that we've set up the lmf */
4706                 /*---------------------------------------------------------------*/
4707                 s390_lmg   (code, s390_r2, s390_r6, s390_r13,
4708                             G_STRUCT_OFFSET(MonoLMF, pregs[0]));
4709         }
4710
4711         if (tracing)
4712                 code = mono_arch_instrument_prolog(cfg, enter_method, code, TRUE);
4713
4714         cfg->code_len = code - cfg->native_code;
4715         g_assert (cfg->code_len < cfg->code_size);
4716
4717         g_free (cinfo);
4718
4719         return code;
4720 }
4721
4722 /*========================= End of Function ========================*/
4723
4724 /*------------------------------------------------------------------*/
4725 /*                                                                  */
4726 /* Name         - mono_arch_emit_epilog                             */
4727 /*                                                                  */
4728 /* Function     - Emit the instructions for a function epilog.      */
4729 /*                                                                  */
4730 /*------------------------------------------------------------------*/
4731
4732 void
4733 mono_arch_emit_epilog (MonoCompile *cfg)
4734 {
4735         MonoMethod *method = cfg->method;
4736         int tracing = 0;
4737         guint8 *code;
4738         int max_epilog_size = 96;
4739
4740         if (cfg->method->save_lmf)
4741                 max_epilog_size += 128;
4742
4743         if (mono_jit_trace_calls != NULL)
4744                 max_epilog_size += 128;
4745
4746         if (cfg->prof_options & MONO_PROFILE_ENTER_LEAVE)
4747                 max_epilog_size += 128;
4748
4749         while ((cfg->code_len + max_epilog_size) > (cfg->code_size - 16)) {
4750                 cfg->code_size  *= 2;
4751                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
4752                 mono_jit_stats.code_reallocs++;
4753         }
4754
4755         code = cfg->native_code + cfg->code_len;
4756
4757         if (mono_jit_trace_calls != NULL && mono_trace_eval (method)) {
4758                 code = mono_arch_instrument_epilog (cfg, leave_method, code, TRUE);
4759                 tracing = 1;
4760         }
4761
4762         if (method->save_lmf)
4763                 restoreLMF(code, cfg->frame_reg, cfg->stack_usage);
4764
4765         if (cfg->flags & MONO_CFG_HAS_ALLOCA)
4766                 s390_lg  (code, STK_BASE, 0, STK_BASE, 0);
4767         else
4768                 code = backUpStackPtr(cfg, code);
4769
4770         s390_lmg (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
4771         s390_br  (code, s390_r14);
4772
4773         cfg->code_len = code - cfg->native_code;
4774
4775         g_assert (cfg->code_len < cfg->code_size);
4776
4777 }
4778
4779 /*========================= End of Function ========================*/
4780
4781 /*------------------------------------------------------------------*/
4782 /*                                                                  */
4783 /* Name         - mono_arch_emit_exceptions                         */
4784 /*                                                                  */
4785 /* Function     - Emit the blocks to handle exception conditions.   */
4786 /*                                                                  */
4787 /*------------------------------------------------------------------*/
4788
4789 void
4790 mono_arch_emit_exceptions (MonoCompile *cfg)
4791 {
4792         MonoJumpInfo    *patch_info;
4793         guint8          *code;
4794         int             nThrows = 0,
4795                         exc_count = 0,
4796                         iExc;
4797         guint32         code_size;
4798         MonoClass       *exc_classes [MAX_EXC];
4799         guint8          *exc_throw_start [MAX_EXC];
4800
4801         for (patch_info = cfg->patch_info;
4802              patch_info;
4803              patch_info = patch_info->next) {
4804                 if (patch_info->type == MONO_PATCH_INFO_EXC)
4805                         exc_count++;
4806         }
4807
4808         code_size = exc_count * 48;
4809
4810         while ((cfg->code_len + code_size) > (cfg->code_size - 16)) {
4811                 cfg->code_size  *= 2;
4812                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
4813                 mono_jit_stats.code_reallocs++;
4814         }
4815
4816         code = cfg->native_code + cfg->code_len;
4817
4818         /*---------------------------------------------------------------------*/
4819         /* Add code to raise exceptions                                        */
4820         /*---------------------------------------------------------------------*/
4821         for (patch_info = cfg->patch_info; patch_info; patch_info = patch_info->next) {
4822                 switch (patch_info->type) {
4823                 case MONO_PATCH_INFO_EXC: {
4824                         guint8 *ip = patch_info->ip.i + cfg->native_code;
4825                         MonoClass *exc_class;
4826                         guint64 throw_ip;
4827
4828                         /*-----------------------------------------------------*/
4829                         /* Patch the branch in epilog to come here             */
4830                         /*-----------------------------------------------------*/
4831                         s390_patch_rel (ip + 2, (guint64) S390_RELATIVE(code,ip));
4832
4833                         exc_class = mono_class_from_name (mono_defaults.corlib,
4834                                                           "System",
4835                                                           patch_info->data.name);
4836                         g_assert (exc_class);
4837                         throw_ip = patch_info->ip.i;
4838
4839                         for (iExc = 0; iExc < nThrows; ++iExc)
4840                                 if (exc_classes [iExc] == exc_class)
4841                                         break;
4842
4843                         if (iExc < nThrows) {
4844                                 s390_jcl (code, S390_CC_UN,
4845                                           (guint64) exc_throw_start [iExc]);
4846                                 patch_info->type = MONO_PATCH_INFO_NONE;
4847                         } else {
4848
4849                                 if (nThrows < MAX_EXC) {
4850                                         exc_classes [nThrows]     = exc_class;
4851                                         exc_throw_start [nThrows] = code;
4852                                 }
4853
4854                                 /*---------------------------------------------*/
4855                                 /* Patch the parameter passed to the handler   */
4856                                 /*---------------------------------------------*/
4857                                 s390_basr (code, s390_r13, 0);
4858                                 s390_j    (code, 6);
4859                                 s390_llong(code, patch_info->data.target);
4860                                 /*---------------------------------------------*/
4861                                 /* Load return address & parameter register    */
4862                                 /*---------------------------------------------*/
4863                                 s390_larl (code, s390_r14, S390_RELATIVE((patch_info->ip.i +
4864                                                            cfg->native_code + 8), code));
4865                                 s390_lg   (code, s390_r2, 0, s390_r13, 4);
4866                                 /*---------------------------------------------*/
4867                                 /* Reuse the current patch to set the jump     */
4868                                 /*---------------------------------------------*/
4869                                 s390_basr (code, s390_r13, 0);
4870                                 s390_j    (code, 6);
4871                                 patch_info->type      = MONO_PATCH_INFO_INTERNAL_METHOD;
4872                                 patch_info->data.name = "mono_arch_throw_exception_by_name";
4873                                 patch_info->ip.i      = code - cfg->native_code;
4874                                 s390_llong(code, 0);
4875                                 s390_lg   (code, s390_r1, 0, s390_r13, 4);
4876                                 s390_br   (code, s390_r1);
4877                         }
4878                         break;
4879                 }
4880                 default:
4881                         /* do nothing */
4882                         break;
4883                 }
4884         }
4885
4886         cfg->code_len = code - cfg->native_code;
4887
4888         g_assert (cfg->code_len < cfg->code_size);
4889
4890 }
4891
4892 /*========================= End of Function ========================*/
4893
4894 /*------------------------------------------------------------------*/
4895 /*                                                                  */
4896 /* Name         - mono_arch_setup_jit_tls_data                      */
4897 /*                                                                  */
4898 /* Function     - Setup the JIT's Thread Level Specific Data.       */
4899 /*                                                                  */
4900 /*------------------------------------------------------------------*/
4901
4902 void
4903 mono_arch_setup_jit_tls_data (MonoJitTlsData *tls)
4904 {
4905         if (!tls_offset_inited) {
4906                 tls_offset_inited = TRUE;
4907
4908 #if HAVE_KW_THREAD
4909 # if 0
4910         __asm__ ("\tear\t%r1,0\n"
4911                  "\tlr\t%0,%3\n"
4912                  "\tsr\t%0,%r1\n"
4913                  "\tlr\t%1,%4\n"
4914                  "\tsr\t%1,%r1\n"
4915                  "\tlr\t%2,%5\n"
4916                  "\tsr\t%2,%r1\n"
4917                  : "=r" (appdomain_tls_offset),
4918                    "=r" (thread_tls_offset),
4919                    "=r" (lmf_tls_offset)
4920                  : "r" (&tls_appdomain),
4921                    "r" (&tls_current_object),
4922                    "r" (&mono_lmf_addr)
4923                  : "1", "cc");
4924 # endif
4925 #endif
4926         }
4927
4928         if (!lmf_addr_key_inited) {
4929                 lmf_addr_key_inited = TRUE;
4930                 pthread_key_create (&lmf_addr_key, NULL);
4931         }
4932         pthread_setspecific (lmf_addr_key, &tls->lmf);
4933
4934 }
4935
4936 /*========================= End of Function ========================*/
4937
4938 /*------------------------------------------------------------------*/
4939 /*                                                                  */
4940 /* Name         - mono_arch_free_jit_tls_data                       */
4941 /*                                                                  */
4942 /* Function     - Free tls data.                                    */
4943 /*                                                                  */
4944 /*------------------------------------------------------------------*/
4945
4946 void
4947 mono_arch_free_jit_tls_data (MonoJitTlsData *tls)
4948 {
4949
4950 }
4951
4952 /*========================= End of Function ========================*/
4953
4954 /*------------------------------------------------------------------*/
4955 /*                                                                  */
4956 /* Name         - mono_arch_emit_this_vret_args                     */
4957 /*                                                                  */
4958 /* Function     -                                                   */
4959 /*                                                                  */
4960 /*------------------------------------------------------------------*/
4961
4962 void
4963 mono_arch_emit_this_vret_args (MonoCompile *cfg, MonoCallInst *inst, int this_reg, int this_type, int vt_reg)
4964 {
4965         int this_dreg = s390_r2;
4966
4967         if (vt_reg != -1)
4968                 this_dreg = s390_r3;
4969
4970         /* add the this argument */
4971         if (this_reg != -1) {
4972                 MonoInst *this;
4973                 MONO_INST_NEW (cfg, this, OP_SETREG);
4974                 this->type  = this_type;
4975                 this->sreg1 = this_reg;
4976                 this->dreg  = mono_regstate_next_int (cfg->rs);
4977                 mono_bblock_add_inst (cfg->cbb, this);
4978                 mono_call_inst_add_outarg_reg (cfg, inst, this->dreg, this_dreg, FALSE);
4979         }
4980
4981         if (vt_reg != -1) {
4982                 MonoInst *vtarg;
4983                 MONO_INST_NEW (cfg, vtarg, OP_SETREG);
4984                 vtarg->type  = STACK_MP;
4985                 vtarg->sreg1 = vt_reg;
4986                 vtarg->dreg  = mono_regstate_next_int (cfg->rs);
4987                 mono_bblock_add_inst (cfg->cbb, vtarg);
4988                 mono_call_inst_add_outarg_reg (cfg, inst, vtarg->dreg, s390_r2, FALSE);
4989         }
4990 }
4991
4992 /*========================= End of Function ========================*/
4993
4994 /*------------------------------------------------------------------*/
4995 /*                                                                  */
4996 /* Name         - mono_arch_get_inst_for_method                   */
4997 /*                                                                  */
4998 /* Function     - Check for opcodes we can handle directly in       */
4999 /*                hardware.                                         */
5000 /*                                                                  */
5001 /*------------------------------------------------------------------*/
5002
5003 MonoInst*
5004 mono_arch_get_inst_for_method (MonoCompile *cfg, MonoMethod *cmethod,
5005                                MonoMethodSignature *fsig, MonoInst **args)
5006 {
5007         MonoInst *ins = NULL;
5008
5009         if (cmethod->klass == mono_defaults.math_class) {
5010                 if (strcmp (cmethod->name, "Sqrt") == 0) {
5011                         MONO_INST_NEW (cfg, ins, OP_SQRT);
5012                         ins->inst_i0 = args [0];
5013                 }
5014 //              if (strcmp (cmethod->name, "Abs") == 0) {
5015 //                      MONO_INST_NEW (cfg, ins, OP_ABS);
5016 //                      ins->inst_i0 = args [0];
5017 //              }
5018         } else if (cmethod->klass == mono_defaults.thread_class &&
5019                            strcmp (cmethod->name, "MemoryBarrier") == 0) {
5020                 MONO_INST_NEW (cfg, ins, OP_MEMORY_BARRIER);
5021         } else if(cmethod->klass->image == mono_defaults.corlib &&
5022                            (strcmp (cmethod->klass->name_space, "System.Threading") == 0) &&
5023                            (strcmp (cmethod->klass->name, "Interlocked") == 0)) {
5024
5025                 if (strcmp (cmethod->name, "Increment") == 0) {
5026                         MonoInst *ins_iconst;
5027                         guint32 opcode = 0;
5028
5029                         if (fsig->params [0]->type == MONO_TYPE_I4)
5030                                 opcode = OP_ATOMIC_ADD_NEW_I4;
5031                         else if (fsig->params [0]->type == MONO_TYPE_I8)
5032                                 opcode = OP_ATOMIC_ADD_NEW_I8;
5033                         else
5034                                 g_assert_not_reached ();
5035
5036                         MONO_INST_NEW (cfg, ins, opcode);
5037                         MONO_INST_NEW (cfg, ins_iconst, OP_ICONST);
5038                         ins_iconst->inst_c0 = 1;
5039
5040                         ins->inst_i0 = args [0];
5041                         ins->inst_i1 = ins_iconst;
5042                 } else if (strcmp (cmethod->name, "Decrement") == 0) {
5043                         MonoInst *ins_iconst;
5044                         guint32 opcode = 0;
5045
5046                         if (fsig->params [0]->type == MONO_TYPE_I4)
5047                                 opcode = OP_ATOMIC_ADD_NEW_I4;
5048                         else if (fsig->params [0]->type == MONO_TYPE_I8)
5049                                 opcode = OP_ATOMIC_ADD_NEW_I8;
5050                         else
5051                                 g_assert_not_reached ();
5052                         MONO_INST_NEW (cfg, ins, opcode);
5053                         MONO_INST_NEW (cfg, ins_iconst, OP_ICONST);
5054                         ins_iconst->inst_c0 = -1;
5055
5056                         ins->inst_i0 = args [0];
5057                         ins->inst_i1 = ins_iconst;
5058                         /* FIXME: */
5059                 } else if (strcmp (cmethod->name, "Exchange") == 0) {
5060                         guint32 opcode = 0;
5061
5062                         if (fsig->params [0]->type == MONO_TYPE_I4)
5063                                 opcode = OP_ATOMIC_EXCHANGE_I4;
5064                         else if ((fsig->params [0]->type == MONO_TYPE_I8) ||
5065                                          (fsig->params [0]->type == MONO_TYPE_I) ||
5066                                          (fsig->params [0]->type == MONO_TYPE_OBJECT))
5067                                 opcode = OP_ATOMIC_EXCHANGE_I8;
5068                         else
5069                                 return NULL;
5070
5071                         MONO_INST_NEW (cfg, ins, opcode);
5072
5073                         ins->inst_i0 = args [0];
5074                         ins->inst_i1 = args [1];
5075                 } else if (strcmp (cmethod->name, "Add") == 0) {
5076                         guint32 opcode = 0;
5077
5078                         if (fsig->params [0]->type == MONO_TYPE_I4)
5079                                 opcode = OP_ATOMIC_ADD_I4;
5080                         else if (fsig->params [0]->type == MONO_TYPE_I8)
5081                                 opcode = OP_ATOMIC_ADD_I8;
5082                         else
5083                                 g_assert_not_reached ();
5084
5085                         MONO_INST_NEW (cfg, ins, opcode);
5086
5087                         ins->inst_i0 = args [0];
5088                         ins->inst_i1 = args [1];
5089                 } else if ((strcmp (cmethod->name, "Read") == 0 &&
5090                            (fsig->params [0]->type == MONO_TYPE_I8))) {
5091                         MONO_INST_NEW (cfg, ins, CEE_LDIND_I8);
5092                         ins->inst_i0 = args [0];
5093                 }
5094         }
5095         return ins;
5096 }
5097
5098 /*========================= End of Function ========================*/
5099
5100 /*------------------------------------------------------------------*/
5101 /*                                                                  */
5102 /* Name         - mono_arch_print_tree                              */
5103 /*                                                                  */
5104 /* Function     - Print platform-specific opcode details.           */
5105 /*                                                                  */
5106 /* Returns      - 1 - opcode details have been printed              */
5107 /*                0 - opcode details have not been printed          */
5108 /*                                                                  */
5109 /*------------------------------------------------------------------*/
5110
5111 gboolean
5112 mono_arch_print_tree (MonoInst *tree, int arity)
5113 {
5114         gboolean done;
5115
5116         switch (tree->opcode) {
5117                 case OP_S390_LOADARG:
5118                 case OP_S390_ARGREG:
5119                 case OP_S390_ARGPTR:
5120                         printf ("[0x%lx(%s)]", tree->inst_offset,
5121                                 mono_arch_regname (tree->inst_basereg));
5122                         done = 1;
5123                         break;
5124                 case OP_S390_STKARG:
5125                         printf ("[0x%lx(previous_frame)]",
5126                                 tree->inst_offset);
5127                         done = 1;
5128                         break;
5129                 case OP_S390_MOVE:
5130                         printf ("[0x%lx(%d,%s),0x%lx(%s)]",
5131                                 tree->inst_offset, tree->backend.size,
5132                                 mono_arch_regname(tree->dreg),
5133                                 tree->inst_imm,
5134                                 mono_arch_regname(tree->sreg1));
5135                         done = 1;
5136                         break;
5137                 case OP_S390_SETF4RET:
5138                         printf ("[f%s,f%s]",
5139                                 mono_arch_regname (tree->dreg),
5140                                 mono_arch_regname (tree->sreg1));
5141                         done = 1;
5142                         break;
5143                 case OP_TLS_GET:
5144                         printf ("[0x%lx(0x%lx,%s)]", tree->inst_offset,
5145                                 tree->inst_imm,
5146                                 mono_arch_regname (tree->sreg1));
5147                         done = 1;
5148                         break;
5149                 case OP_S390_BKCHAIN:
5150                         printf ("[previous_frame(%s)]",
5151                                 mono_arch_regname (tree->sreg1));
5152                         done = 1;
5153                 default:
5154                         done = 0;
5155         }
5156         return (done);
5157 }
5158
5159 /*========================= End of Function ========================*/
5160
5161 /*------------------------------------------------------------------*/
5162 /*                                                                  */
5163 /* Name         - mono_arch_regalloc_cost                           */
5164 /*                                                                  */
5165 /* Function     - Determine the cost, in the number of memory       */
5166 /*                references, of the action of allocating the var-  */
5167 /*                iable VMV into a register during global register  */
5168 /*                allocation.                                       */
5169 /*                                                                  */
5170 /* Returns      - Cost                                              */
5171 /*                                                                  */
5172 /*------------------------------------------------------------------*/
5173
5174 guint32
5175 mono_arch_regalloc_cost (MonoCompile *cfg, MonoMethodVar *vmv)
5176 {
5177         /* FIXME: */
5178         return 2;
5179 }
5180
5181 /*========================= End of Function ========================*/
5182
5183 /*------------------------------------------------------------------*/
5184 /*                                                                  */
5185 /* Name         - mono_arch_get_domain_intrinsic                    */
5186 /*                                                                  */
5187 /* Function     -                                                   */
5188 /*                                                                  */
5189 /* Returns      -                                                   */
5190 /*                                                                  */
5191 /*------------------------------------------------------------------*/
5192
5193 MonoInst *
5194 mono_arch_get_domain_intrinsic (MonoCompile* cfg)
5195 {
5196         MonoInst *ins;
5197
5198         if (appdomain_tls_offset == -1)
5199                 return NULL;
5200
5201         MONO_INST_NEW (cfg, ins, OP_TLS_GET);
5202         ins->inst_offset = appdomain_tls_offset;
5203         return (ins);
5204 }
5205
5206 /*========================= End of Function ========================*/
5207
5208 /*------------------------------------------------------------------*/
5209 /*                                                                  */
5210 /* Name         - mono_arch_get_thread_intrinsic                    */
5211 /*                                                                  */
5212 /* Function     -                                                   */
5213 /*                                                                  */
5214 /* Returns      -                                                   */
5215 /*                                                                  */
5216 /*------------------------------------------------------------------*/
5217
5218 MonoInst *
5219 mono_arch_get_thread_intrinsic (MonoCompile* cfg)
5220 {
5221         MonoInst *ins;
5222
5223         if (thread_tls_offset == -1)
5224                 return NULL;
5225
5226         MONO_INST_NEW (cfg, ins, OP_TLS_GET);
5227         ins->inst_offset = thread_tls_offset;
5228         return (ins);
5229 }
5230
5231 /*========================= End of Function ========================*/
5232
5233 /*------------------------------------------------------------------*/
5234 /*                                                                  */
5235 /* Name         - mono_arch_flush_register_windows                  */
5236 /*                                                                  */
5237 /* Function     -                                                   */
5238 /*                                                                  */
5239 /* Returns      -                                                   */
5240 /*                                                                  */
5241 /*------------------------------------------------------------------*/
5242
5243 void
5244 mono_arch_flush_register_windows (void)
5245 {
5246 }
5247
5248 /*========================= End of Function ========================*/
5249
5250 /*------------------------------------------------------------------*/
5251 /*                                                                  */
5252 /* Name         - mono_arch_get_lmf_addr                            */
5253 /*                                                                  */
5254 /* Function     -                                                   */
5255 /*                                                                  */
5256 /* Returns      -                                                   */
5257 /*                                                                  */
5258 /*------------------------------------------------------------------*/
5259
5260 gpointer
5261 mono_arch_get_lmf_addr (void)
5262 {
5263         return pthread_getspecific (lmf_addr_key);
5264 }
5265
5266 /*========================= End of Function ========================*/
5267
5268 /*------------------------------------------------------------------*/
5269 /*                                                                  */
5270 /* Name         - mono_arch_is_inst_imm                             */
5271 /*                                                                  */
5272 /* Function     - Determine if operand qualifies as an immediate    */
5273 /*                value. For s390 this is a value -32768-32768      */
5274 /*                                                                  */
5275 /* Returns      - True|False - is [not] immediate value.            */
5276 /*                                                                  */
5277 /*------------------------------------------------------------------*/
5278
5279 gboolean
5280 mono_arch_is_inst_imm (gint64 imm)
5281 {
5282         return s390_is_imm16 (imm);
5283 }
5284
5285 /*========================= End of Function ========================*/
5286
5287 /*------------------------------------------------------------------*/
5288 /*                                                                  */
5289 /* Name         - opcode_to_cond                                    */
5290 /*                                                                  */
5291 /* Function     - Simplify the branch on condition opcode from      */
5292 /*                more than 20 to just a handful for easy manipu-   */
5293 /*                lation within the instruction emitting code.      */
5294 /*                                                                  */
5295 /* Returns      - CMP_xxx - this simplified condition type.         */
5296 /*                                                                  */
5297 /*------------------------------------------------------------------*/
5298
5299 static CompRelation
5300 opcode_to_cond (int opcode)
5301 {
5302         switch (opcode) {
5303         case CEE_BEQ:
5304         case OP_CEQ:
5305         case OP_IBEQ:
5306         case OP_ICEQ:
5307         case OP_FBEQ:
5308         case OP_FCEQ:
5309         case OP_COND_EXC_EQ:
5310                 return CMP_EQ;
5311         case CEE_BNE_UN:
5312         case OP_COND_EXC_NE_UN:
5313         case OP_IBNE_UN:
5314         case OP_FBNE_UN:
5315                 return CMP_NE;
5316         case CEE_BLE:
5317         case OP_IBLE:
5318         case OP_FBLE:
5319                 return CMP_LE;
5320         case CEE_BGE:
5321         case OP_IBGE:
5322         case OP_FBGE:
5323                 return CMP_GE;
5324         case CEE_BLT:
5325         case OP_COND_EXC_LT:
5326         case OP_CLT:
5327         case OP_IBLT:
5328         case OP_ICLT:
5329         case OP_FBLT:
5330         case OP_FCLT:
5331                 return CMP_LT;
5332         case CEE_BGT:
5333         case OP_COND_EXC_GT:
5334         case OP_CGT:
5335         case OP_IBGT:
5336         case OP_ICGT:
5337         case OP_FBGT:
5338         case OP_FCGT:
5339                 return CMP_GT;
5340
5341         case CEE_BLE_UN:
5342         case OP_COND_EXC_LE_UN:
5343         case OP_IBLE_UN:
5344         case OP_FBLE_UN:
5345                 return CMP_LE_UN;
5346         case CEE_BGE_UN:
5347         case OP_IBGE_UN:
5348         case OP_FBGE_UN:
5349                 return CMP_GE_UN;
5350         case CEE_BLT_UN:
5351         case OP_CLT_UN:
5352         case OP_IBLT_UN:
5353         case OP_ICLT_UN:
5354         case OP_FBLT_UN:
5355         case OP_FCLT_UN:
5356         case OP_COND_EXC_LT_UN:
5357                 return CMP_LT_UN;
5358         case CEE_BGT_UN:
5359         case OP_COND_EXC_GT_UN:
5360         case OP_CGT_UN:
5361         case OP_IBGT_UN:
5362         case OP_ICGT_UN:
5363         case OP_FCGT_UN:
5364         case OP_FBGT_UN:
5365                 return CMP_GT_UN;
5366         default:
5367                 printf ("%s\n", mono_inst_name (opcode));
5368                 g_error("Not implemented\n");
5369         }
5370         return CMP_EQ;
5371 }
5372
5373 /*========================= End of Function ========================*/
5374
5375 /*------------------------------------------------------------------*/
5376 /*                                                                  */
5377 /* Name         - mono_arch_get_patch_offset                        */
5378 /*                                                                  */
5379 /* Function     - Dummy entry point until s390x supports aot.       */
5380 /*                                                                  */
5381 /* Returns      - Offset for patch.                                 */
5382 /*                                                                  */
5383 /*------------------------------------------------------------------*/
5384
5385 guint32
5386 mono_arch_get_patch_offset (guint8 *code)
5387 {
5388         return 0;
5389 }
5390
5391 /*========================= End of Function ========================*/