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 EMIT_COND_BRANCH(ins,cond)                                                      \
  22 {                                                                                       \
  23 if (ins->flags & MONO_INST_BRLABEL) {                                                   \
  24         if (ins->inst_i0->inst_c0) {                                                    \
  25                 int displace;                                                           \
  26                 displace = ((cfg->native_code + ins->inst_i0->inst_c0) - code) / 2;     \
  27                 if (s390_is_imm16(displace)) {                                          \
  28                         s390_brc (code, cond, displace);                                \
  29                 } else {                                                                \
  30                         s390_jcl (code, cond, displace);                                \
  31                 }                                                                       \
  32         } else {                                                                        \
  33                 mono_add_patch_info (cfg, code - cfg->native_code,                      \
  34                                      MONO_PATCH_INFO_LABEL, ins->inst_i0);              \
  35                 s390_jcl (code, cond, 0);                                               \
  36         }                                                                               \
  37 } else {                                                                                \
  38         if (ins->inst_true_bb->native_offset) {                                         \
  39                 int displace;                                                           \
  40                 displace = ((cfg->native_code +                                         \
  41                             ins->inst_true_bb->native_offset) - code) / 2;              \
  42                 if (s390_is_imm16(displace)) {                                          \
  43                         s390_brc (code, cond, displace);                                \
  44                 } else {                                                                \
  45                         s390_jcl (code, cond, displace);                                \
  46                 }                                                                       \
  47         } else {                                                                        \
  48                 mono_add_patch_info (cfg, code - cfg->native_code,                      \
  49                                      MONO_PATCH_INFO_BB, ins->inst_true_bb);            \
  50                 s390_jcl (code, cond, 0);                                               \
  51         }                                                                               \
  52 }                                                                                       \
  53 }
  54
  55 #define EMIT_UNCOND_BRANCH(ins)                                                         \
  56 {                                                                                       \
  57 if (ins->flags & MONO_INST_BRLABEL) {                                                   \
  58         if (ins->inst_i0->inst_c0) {                                                    \
  59                 int displace;                                                           \
  60                 displace = ((cfg->native_code + ins->inst_i0->inst_c0) - code) / 2;     \
  61                 if (s390_is_imm16(displace)) {                                          \
  62                         s390_brc (code, S390_CC_UN, displace);                          \
  63                 } else {                                                                \
  64                         s390_jcl (code, S390_CC_UN, displace);                          \
  65                 }                                                                       \
  66         } else {                                                                        \
  67                 mono_add_patch_info (cfg, code - cfg->native_code,                      \
  68                                      MONO_PATCH_INFO_LABEL, ins->inst_i0);              \
  69                 s390_jcl (code, S390_CC_UN, 0);                                         \
  70         }                                                                               \
  71 } else {                                                                                \
  72         if (ins->inst_target_bb->native_offset) {                                       \
  73                 int displace;                                                           \
  74                 displace = ((cfg->native_code +                                         \
  75                             ins->inst_target_bb->native_offset) - code) / 2;            \
  76                 if (s390_is_imm16(displace)) {                                          \
  77                         s390_brc (code, S390_CC_UN, displace);                          \
  78                 } else {                                                                \
  79                         s390_jcl (code, S390_CC_UN, displace);                          \
  80                 }                                                                       \
  81         } else {                                                                        \
  82                 mono_add_patch_info (cfg, code - cfg->native_code,                      \
  83                                      MONO_PATCH_INFO_BB, ins->inst_target_bb);          \
  84                 s390_jcl (code, S390_CC_UN, 0);                                         \
  85         }                                                                               \
  86 }                                                                                       \
  87 }
  88
  89 #define EMIT_COND_SYSTEM_EXCEPTION(cond,exc_name)                       \
  90         do {                                                            \
  91                 mono_add_patch_info (cfg, code - cfg->native_code,      \
  92                                     MONO_PATCH_INFO_EXC, exc_name);     \
  93                 s390_jcl (code, cond, 0);                               \
  94         } while (0);
  95
  96 #define CHECK_SRCDST_COM                                                \
  97         if (ins->dreg == ins->sreg2) {                                  \
  98                 src2 = ins->sreg1;                                      \
  99         } else {                                                        \
 100                 src2 = ins->sreg2;                                      \
 101                 if (ins->dreg != ins->sreg1) {                          \
 102                         s390_lgr (code, ins->dreg, ins->sreg1);         \
 103                 }                                                       \
 104         }
 105
 106 #define CHECK_SRCDST_NCOM                                               \
 107         if (ins->dreg == ins->sreg2) {                                  \
 108                 src2 = s390_r13;                                        \
 109                 s390_lgr (code, s390_r13, ins->sreg2);                  \
 110         } else {                                                        \
 111                 src2 = ins->sreg2;                                      \
 112         }                                                               \
 113         if (ins->dreg != ins->sreg1) {                                  \
 114                 s390_lgr (code, ins->dreg, ins->sreg1);                 \
 115         }
 116
 117 #define CHECK_SRCDST_COM_I                                              \
 118         if (ins->dreg == ins->sreg2) {                                  \
 119                 src2 = ins->sreg1;                                      \
 120         } else {                                                        \
 121                 src2 = ins->sreg2;                                      \
 122                 if (ins->dreg != ins->sreg1) {                          \
 123                         s390_lgfr (code, ins->dreg, ins->sreg1);        \
 124                 }                                                       \
 125         }
 126
 127 #define CHECK_SRCDST_NCOM_I                                             \
 128         if (ins->dreg == ins->sreg2) {                                  \
 129                 src2 = s390_r13;                                        \
 130                 s390_lgfr (code, s390_r13, ins->sreg2);                 \
 131         } else {                                                        \
 132                 src2 = ins->sreg2;                                      \
 133         }                                                               \
 134         if (ins->dreg != ins->sreg1) {                                  \
 135                 s390_lgfr (code, ins->dreg, ins->sreg1);                \
 136         }
 137
 138 #define CHECK_SRCDST_COM_F                                              \
 139         if (ins->dreg == ins->sreg2) {                                  \
 140                 src2 = ins->sreg1;                                      \
 141         } else {                                                        \
 142                 src2 = ins->sreg2;                                      \
 143                 if (ins->dreg != ins->sreg1) {                          \
 144                         s390_ldr (code, ins->dreg, ins->sreg1);         \
 145                 }                                                       \
 146         }
 147
 148 #define CHECK_SRCDST_NCOM_F                                             \
 149         if (ins->dreg == ins->sreg2) {                                  \
 150                 src2 = s390_f15;                                        \
 151                 s390_ldr (code, s390_r13, ins->sreg2);                  \
 152         } else {                                                        \
 153                 src2 = ins->sreg2;                                      \
 154         }                                                               \
 155         if (ins->dreg != ins->sreg1) {                                  \
 156                 s390_ldr (code, ins->dreg, ins->sreg1);                 \
 157         }
 158
 159 #undef DEBUG
 160 #define DEBUG(a) if (cfg->verbose_level > 1) a
 161
 162 #define MAX_EXC 16
 163
 164 #define S390_TRACE_STACK_SIZE (5*sizeof(gpointer)+4*sizeof(gdouble))
 165
 166 #define MAX(a, b) ((a) > (b) ? (a) : (b))
 167
 168 /*========================= End of Defines =========================*/
 169
 170 /*------------------------------------------------------------------*/
 171 /*                 I n c l u d e s                                  */
 172 /*------------------------------------------------------------------*/
 173
 174 #include "mini.h"
 175 #include <string.h>
 176
 177 #include <mono/metadata/appdomain.h>
 178 #include <mono/metadata/debug-helpers.h>
 179 #include <mono/metadata/profiler-private.h>
 180 #include <mono/utils/mono-math.h>
 181
 182 #include "mini-s390x.h"
 183 #include "inssel.h"
 184 #include "cpu-s390x.h"
 185 #include "jit-icalls.h"
 186
 187 /*========================= End of Includes ========================*/
 188
 189 /*------------------------------------------------------------------*/
 190 /*                 T y p e d e f s                                  */
 191 /*------------------------------------------------------------------*/
 192
 193 typedef struct {
 194         guint stack_size,
 195               local_size,
 196               code_size,
 197               parm_size,
 198               offset,
 199               offStruct,
 200               retStruct;
 201 } size_data;
 202
 203 /*------------------------------------------------------------------*/
 204 /* Used by the instrument_emit_epilog                               */
 205 /*------------------------------------------------------------------*/
 206
 207 enum {
 208         SAVE_NONE,
 209         SAVE_STRUCT,
 210         SAVE_ONE,
 211         SAVE_TWO,
 212         SAVE_R4,
 213         SAVE_R8
 214 };
 215
 216 typedef struct InstList InstList;
 217
 218 struct InstList {
 219         InstList *prev;
 220         InstList *next;
 221         MonoInst *data;
 222 };
 223
 224 enum {
 225         RegTypeGeneral,
 226         RegTypeBase,
 227         RegTypeFP,
 228         RegTypeStructByVal,
 229         RegTypeStructByAddr
 230 };
 231
 232 typedef struct {
 233         gint32  offset;         /* offset from caller's stack */
 234         gint32  offparm;        /* offset from callee's stack */
 235         guint16 vtsize;         /* in param area */
 236         guint8  reg;
 237         guint8  regtype;        /* See RegType* */
 238         guint32 size;           /* Size of structure used by RegTypeStructByVal */
 239         gint32  type;           /* Data type of argument */
 240 } ArgInfo;
 241
 242 typedef struct {
 243         int nargs;
 244         int lastgr;
 245         guint32 stack_usage;
 246         guint32 struct_ret;
 247         ArgInfo ret;
 248         ArgInfo sigCookie;
 249         ArgInfo args [1];
 250 } CallInfo;
 251
 252 typedef struct {
 253         gint64  gr[5];          /* R2-R6                            */
 254         gdouble fp[3];          /* F0-F2                            */
 255 } __attribute__ ((packed)) RegParm;
 256
 257 /*========================= End of Typedefs ========================*/
 258
 259 /*------------------------------------------------------------------*/
 260 /*                   P r o t o t y p e s                            */
 261 /*------------------------------------------------------------------*/
 262
 263 static void indent (int);
 264 static guint8 * backUpStackPtr(MonoCompile *, guint8 *);
 265 static void decodeParm (MonoType *, void *, int);
 266 static void enter_method (MonoMethod *, RegParm *, char *);
 267 static void leave_method (MonoMethod *, ...);
 268 static gboolean is_regsize_var (MonoType *);
 269 static inline void add_general (guint *, size_data *, ArgInfo *);
 270 static inline void add_stackParm (guint *, size_data *, ArgInfo *, gint);
 271 static inline void add_float (guint *, size_data *, ArgInfo *);
 272 static CallInfo * calculate_sizes (MonoMethodSignature *, size_data *, gboolean);
 273 static void peephole_pass (MonoCompile *, MonoBasicBlock *);
 274 static guchar * emit_float_to_int (MonoCompile *, guchar *, int, int, int, gboolean);
 275 gpointer mono_arch_get_lmf_addr (void);
 276 static guint8 * emit_load_volatile_registers (guint8 *, MonoCompile *);
 277 static CompRelation opcode_to_cond (int);
 278 static void catch_SIGILL(int, siginfo_t *, void *);
 279 static void emit_sig_cookie (MonoCompile *, MonoCallInst *, CallInfo *, int);
 280
 281 /*========================= End of Prototypes ======================*/
 282
 283 /*------------------------------------------------------------------*/
 284 /*                 G l o b a l   V a r i a b l e s                  */
 285 /*------------------------------------------------------------------*/
 286
 287 int mono_exc_esp_offset = 0;
 288
 289 static int indent_level = 0;
 290
 291 int has_ld = 0;
 292
 293 static gboolean tls_offset_inited = FALSE;
 294
 295 static int appdomain_tls_offset = -1,
 296            lmf_tls_offset = -1,
 297            thread_tls_offset = -1;
 298
 299 pthread_key_t lmf_addr_key;
 300
 301 gboolean lmf_addr_key_inited = FALSE;
 302
 303 #if 0
 304
 305 extern __thread MonoDomain *tls_appdomain;
 306 extern __thread MonoThread *tls_current_object;
 307 extern __thread gpointer   mono_lmf_addr;
 308
 309 #endif
 310
 311 /*====================== End of Global Variables ===================*/
 312
 313 /*------------------------------------------------------------------*/
 314 /*                                                                  */
 315 /* Name         - mono_arch_regname                                 */
 316 /*                                                                  */
 317 /* Function     - Returns the name of the register specified by     */
 318 /*                the input parameter.                              */
 319 /*                                                                  */
 320 /*------------------------------------------------------------------*/
 321
 322 const char*
 323 mono_arch_regname (int reg) {
 324         static const char * rnames[] = {
 325                 "s390_r0", "s390_sp", "s390_r2", "s390_r3", "s390_r4",
 326                 "s390_r5", "s390_r6", "s390_r7", "s390_r8", "s390_r9",
 327                 "s390_r10", "s390_r11", "s390_r12", "s390_r13", "s390_r14",
 328                 "s390_r15"
 329         };
 330
 331         if (reg >= 0 && reg < 16)
 332                 return rnames [reg];
 333         else
 334                 return "unknown";
 335 }
 336
 337 /*========================= End of Function ========================*/
 338
 339 /*------------------------------------------------------------------*/
 340 /*                                                                  */
 341 /* Name         - mono_arch_fregname                                */
 342 /*                                                                  */
 343 /* Function     - Returns the name of the register specified by     */
 344 /*                the input parameter.                              */
 345 /*                                                                  */
 346 /*------------------------------------------------------------------*/
 347
 348 const char*
 349 mono_arch_fregname (int reg) {
 350         static const char * rnames[] = {
 351                 "s390_f0", "s390_f1", "s390_f2", "s390_f3", "s390_f4",
 352                 "s390_f5", "s390_f6", "s390_f7", "s390_f8", "s390_f9",
 353                 "s390_f10", "s390_f11", "s390_f12", "s390_f13", "s390_f14",
 354                 "s390_f15"
 355         };
 356
 357         if (reg >= 0 && reg < 16)
 358                 return rnames [reg];
 359         else
 360                 return "unknown";
 361 }
 362
 363 /*========================= End of Function ========================*/
 364
 365 /*------------------------------------------------------------------*/
 366 /*                                                                  */
 367 /* Name         - arch_get_argument_info                            */
 368 /*                                                                  */
 369 /* Function     - Gathers information on parameters such as size,   */
 370 /*                alignment, and padding. arg_info should be large  */
 371 /*                enough to hold param_count + 1 entries.           */
 372 /*                                                                  */
 373 /* Parameters   - @csig - Method signature                          */
 374 /*                @param_count - No. of parameters to consider      */
 375 /*                @arg_info - An array to store the result info     */
 376 /*                                                                  */
 377 /* Returns      - Size of the activation frame                      */
 378 /*                                                                  */
 379 /*------------------------------------------------------------------*/
 380
 381 int
 382 mono_arch_get_argument_info (MonoMethodSignature *csig,
 383                              int param_count,
 384                              MonoJitArgumentInfo *arg_info)
 385 {
 386         int k, frame_size = 0;
 387         int size, align, pad;
 388         int offset = 8;
 389
 390         if (MONO_TYPE_ISSTRUCT (csig->ret)) {
 391                 frame_size += sizeof (gpointer);
 392                 offset += 8;
 393         }
 394
 395         arg_info [0].offset = offset;
 396
 397         if (csig->hasthis) {
 398                 frame_size += sizeof (gpointer);
 399                 offset += 8;
 400         }
 401
 402         arg_info [0].size = frame_size;
 403
 404         for (k = 0; k < param_count; k++) {
 405
 406                 if (csig->pinvoke)
 407                         size = mono_type_native_stack_size (csig->params [k], &align);
 408                 else
 409                         size = mini_type_stack_size (NULL, csig->params [k], &align);
 410
 411                 frame_size += pad = (align - (frame_size & (align - 1))) & (align - 1);
 412                 arg_info [k].pad = pad;
 413                 frame_size += size;
 414                 arg_info [k + 1].pad = 0;
 415                 arg_info [k + 1].size = size;
 416                 offset += pad;
 417                 arg_info [k + 1].offset = offset;
 418                 offset += size;
 419         }
 420
 421         align = MONO_ARCH_FRAME_ALIGNMENT;
 422         frame_size += pad = (align - (frame_size & (align - 1))) & (align - 1);
 423         arg_info [k].pad = pad;
 424
 425         return frame_size;
 426 }
 427
 428 /*========================= End of Function ========================*/
 429
 430 /*------------------------------------------------------------------*/
 431 /*                                                                  */
 432 /* Name         - retFitsInReg.                                     */
 433 /*                                                                  */
 434 /* Function     - Determines if a value can be returned in one or   */
 435 /*                two registers.                                    */
 436 /*                                                                  */
 437 /*------------------------------------------------------------------*/
 438
 439 static inline gboolean
 440 retFitsInReg(guint32 size)
 441 {
 442         switch (size) {
 443                 case 0:
 444                 case 1:
 445                 case 2:
 446                 case 4:
 447                 case 8:
 448                         return (TRUE);
 449                 break;
 450                 default:
 451                         return (FALSE);
 452         }
 453 }
 454
 455 /*========================= End of Function ========================*/
 456
 457 /*------------------------------------------------------------------*/
 458 /*                                                                  */
 459 /* Name         - backStackPtr.                                     */
 460 /*                                                                  */
 461 /* Function     - Restore Stack Pointer to previous frame.          */
 462 /*                                                                  */
 463 /*------------------------------------------------------------------*/
 464
 465 static inline guint8 *
 466 backUpStackPtr(MonoCompile *cfg, guint8 *code)
 467 {
 468         int stackSize = cfg->stack_usage;
 469
 470         if (s390_is_uimm16 (stackSize)) {
 471                 s390_aghi  (code, STK_BASE, stackSize);
 472         } else {
 473                 while (stackSize > 32767) {
 474                         s390_aghi  (code, STK_BASE, 32767);
 475                         stackSize -= 32767;
 476                 }
 477                 s390_aghi  (code, STK_BASE, stackSize);
 478         }
 479         return (code);
 480 }
 481
 482 /*========================= End of Function ========================*/
 483
 484 /*------------------------------------------------------------------*/
 485 /*                                                                  */
 486 /* Name         - indent                                            */
 487 /*                                                                  */
 488 /* Function     - Perform nice indenting to current level           */
 489 /*                                                                  */
 490 /*------------------------------------------------------------------*/
 491
 492 static void
 493 indent (int diff) {
 494         int v;
 495         if (diff < 0)
 496                 indent_level += diff;
 497         v = indent_level;
 498         printf("[%3d] ",v);
 499         while (v-- > 0) {
 500                 printf (". ");
 501         }
 502         if (diff > 0)
 503                 indent_level += diff;
 504 }
 505
 506 /*========================= End of Function ========================*/
 507
 508 /*------------------------------------------------------------------*/
 509 /*                                                                  */
 510 /* Name         - decodeParm                                        */
 511 /*                                                                  */
 512 /* Function     - Decode a parameter for the trace.                 */
 513 /*                                                                  */
 514 /*------------------------------------------------------------------*/
 515
 516 static void
 517 decodeParm(MonoType *type, void *curParm, int size)
 518 {
 519         guint32 simpleType;
 520
 521         if (type->byref) {
 522                 printf("[BYREF:%p], ", *((char **) curParm));
 523         } else {
 524                 simpleType = mono_type_get_underlying_type(type)->type;
 525 enum_parmtype:
 526                 switch (simpleType) {
 527                         case MONO_TYPE_I :
 528                                 printf ("[INTPTR:%p], ", *((int **) curParm));
 529                                 break;
 530                         case MONO_TYPE_U :
 531                                 printf ("[UINTPTR:%p], ", *((int **) curParm));
 532                                 break;
 533                         case MONO_TYPE_BOOLEAN :
 534                                 printf ("[BOOL:%ld], ", *((gint64 *) curParm));
 535                                 break;
 536                         case MONO_TYPE_CHAR :
 537                                 printf ("[CHAR:%c], ", *((int  *) curParm));
 538                                 break;
 539                         case MONO_TYPE_I1 :
 540                                 printf ("[INT1:%ld], ", *((gint64 *) curParm));
 541                                 break;
 542                         case MONO_TYPE_I2 :
 543                                 printf ("[INT2:%ld], ", *((gint64 *) curParm));
 544                                 break;
 545                         case MONO_TYPE_I4 :
 546                                 printf ("[INT4:%ld], ", *((gint64 *) curParm));
 547                                 break;
 548                         case MONO_TYPE_U1 :
 549                                 printf ("[UINT1:%lu], ", *((guint64 *) curParm));
 550                                 break;
 551                         case MONO_TYPE_U2 :
 552                                 printf ("[UINT2:%lu], ", *((guint64 *) curParm));
 553                                 break;
 554                         case MONO_TYPE_U4 :
 555                                 printf ("[UINT4:%lu], ", *((guint64 *) curParm));
 556                                 break;
 557                         case MONO_TYPE_U8 :
 558                                 printf ("[UINT8:%lu], ", *((guint64 *) curParm));
 559                                 break;
 560                         case MONO_TYPE_STRING : {
 561                                 MonoString *s = *((MonoString **) curParm);
 562                                 if (s) {
 563                                         g_assert (((MonoObject *) s)->vtable->klass == mono_defaults.string_class);
 564                                         printf("[STRING:%p:%s], ", s, mono_string_to_utf8(s));
 565                                 } else {
 566                                         printf("[STRING:null], ");
 567                                 }
 568                                 break;
 569                         }
 570                         case MONO_TYPE_CLASS :
 571                         case MONO_TYPE_OBJECT : {
 572                                 MonoObject *obj = *((MonoObject **) curParm);
 573                                 MonoClass *class;
 574                                 if ((obj) && (obj->vtable)) {
 575                                         printf("[CLASS/OBJ:");
 576                                         class = obj->vtable->klass;
 577                                         printf("%p [%p] ",obj,curParm);
 578                                         if (class == mono_defaults.string_class) {
 579                                                 printf("[STRING:%p:%s]",
 580                                                        obj, mono_string_to_utf8 ((MonoString *) obj));
 581                                         } else if (class == mono_defaults.int32_class) {
 582                                                 printf("[INT32:%p:%d]",
 583                                                         obj, *(gint32 *)((char *)obj + sizeof (MonoObject)));
 584                                         } else
 585                                                 printf("[%s.%s:%p]",
 586                                                        class->name_space, class->name, obj);
 587                                         printf("], ");
 588                                 } else {
 589                                         printf("[OBJECT:null], ");
 590                                 }
 591                                 break;
 592                         }
 593                         case MONO_TYPE_PTR :
 594                                 printf("[PTR:%p], ", *((gpointer **) (curParm)));
 595                                 break;
 596                         case MONO_TYPE_FNPTR :
 597                                 printf("[FNPTR:%p], ", *((gpointer **) (curParm)));
 598                                 break;
 599                         case MONO_TYPE_ARRAY :
 600                                 printf("[ARRAY:%p], ", *((gpointer **) (curParm)));
 601                                 break;
 602                         case MONO_TYPE_SZARRAY :
 603                                 printf("[SZARRAY:%p], ", *((gpointer **) (curParm)));
 604                                 break;
 605                         case MONO_TYPE_I8 :
 606                                 printf("[INT8:%ld], ", *((gint64 *) (curParm)));
 607                                 break;
 608                         case MONO_TYPE_R4 :
 609                                 printf("[FLOAT4:%g], ", *((float *) (curParm)));
 610                                 break;
 611                         case MONO_TYPE_R8 :
 612                                 printf("[FLOAT8:%g], ", *((double *) (curParm)));
 613                                 break;
 614                         case MONO_TYPE_VALUETYPE : {
 615                                 int i;
 616                                 MonoMarshalType *info;
 617
 618                                 if (type->data.klass->enumtype) {
 619                                         simpleType = type->data.klass->enum_basetype->type;
 620                                         printf("{VALUETYPE} - ");
 621                                         goto enum_parmtype;
 622                                 }
 623
 624                                 info = mono_marshal_load_type_info (type->data.klass);
 625
 626                                 if ((info->native_size == sizeof(float)) &&
 627                                     (info->num_fields  == 1) &&
 628                                     (info->fields[0].field->type->type == MONO_TYPE_R4)) {
 629                                                 printf("[FLOAT4:%f], ", *((float *) (curParm)));
 630                                         break;
 631                                 }
 632
 633                                 if ((info->native_size == sizeof(double)) &&
 634                                     (info->num_fields  == 1) &&
 635                                     (info->fields[0].field->type->type == MONO_TYPE_R8)) {
 636                                         printf("[FLOAT8:%g], ", *((double *) (curParm)));
 637                                         break;
 638                                 }
 639
 640                                 printf("[VALUETYPE:");
 641                                 for (i = 0; i < size; i++)
 642                                         printf("%02x,", *((guint8 *)curParm+i));
 643                                 printf("]");
 644                                 break;
 645                         }
 646                         case MONO_TYPE_TYPEDBYREF: {
 647                                 int i;
 648                                 printf("[TYPEDBYREF:");
 649                                 for (i = 0; i < size; i++)
 650                                         printf("%02x,", *((guint8 *)curParm+i));
 651                                 printf("]");
 652                                 break;
 653                         }
 654                         default :
 655                                 printf("[?? - %d], ",simpleType);
 656                 }
 657         }
 658 }
 659
 660 /*========================= End of Function ========================*/
 661
 662 /*------------------------------------------------------------------*/
 663 /*                                                                  */
 664 /* Name         - enter_method                                      */
 665 /*                                                                  */
 666 /* Function     - Perform tracing of the entry to the current       */
 667 /*                method.                                           */
 668 /*                                                                  */
 669 /*------------------------------------------------------------------*/
 670
 671 static void
 672 enter_method (MonoMethod *method, RegParm *rParm, char *sp)
 673 {
 674         int i, oParm = 0, iParm = 0;
 675         MonoClass *class;
 676         MonoObject *obj;
 677         MonoMethodSignature *sig;
 678         char *fname;
 679         guint64 ip;
 680         CallInfo *cinfo;
 681         ArgInfo *ainfo;
 682         size_data sz;
 683         void *curParm;
 684
 685         fname = mono_method_full_name (method, TRUE);
 686         indent (1);
 687         printf ("ENTER: %s ", fname);
 688         g_free (fname);
 689
 690         ip  = (*(guint64 *) (sp+S390_RET_ADDR_OFFSET));
 691         printf ("ip: %p sp: %p - ", (gpointer) ip, sp);
 692
 693         if (rParm == NULL)
 694                 return;
 695
 696         sig = mono_method_signature (method);
 697
 698         cinfo = calculate_sizes (sig, &sz, sig->pinvoke);
 699
 700         if (cinfo->struct_ret) {
 701                 printf ("[STRUCTRET:%p], ", (gpointer) rParm->gr[0]);
 702                 iParm = 1;
 703         }
 704
 705         if (sig->hasthis) {
 706                 gpointer *this = (gpointer *) rParm->gr[iParm];
 707                 obj = (MonoObject *) this;
 708                 if (method->klass->valuetype) {
 709                         if (obj) {
 710                                 printf("this:[value:%p:%016lx], ",
 711                                        this, *((guint64 *)(this+sizeof(MonoObject))));
 712                         } else
 713                                 printf ("this:[NULL], ");
 714                 } else {
 715                         if (obj) {
 716                                 class = obj->vtable->klass;
 717                                 if (class == mono_defaults.string_class) {
 718                                         printf ("this:[STRING:%p:%s], ",
 719                                                 obj, mono_string_to_utf8 ((MonoString *)obj));
 720                                 } else {
 721                                         printf ("this:%p[%s.%s], ",
 722                                                 obj, class->name_space, class->name);
 723                                 }
 724                         } else
 725                                 printf ("this:NULL, ");
 726                 }
 727                 oParm++;
 728         }
 729
 730         for (i = 0; i < sig->param_count; ++i) {
 731                 ainfo = &cinfo->args[i + oParm];
 732                 switch (ainfo->regtype) {
 733                         case RegTypeGeneral :
 734                                 decodeParm(sig->params[i], &(rParm->gr[ainfo->reg-2]), ainfo->size);
 735                                 break;
 736                         case RegTypeFP :
 737                                 decodeParm(sig->params[i], &(rParm->fp[ainfo->reg]), ainfo->size);
 738                                 break;
 739                         case RegTypeBase :
 740                                 decodeParm(sig->params[i], sp+ainfo->offset, ainfo->size);
 741                                 break;
 742                         case RegTypeStructByVal :
 743                                 if (ainfo->reg != STK_BASE) {
 744                                         int offset = sizeof(glong) - ainfo->size;
 745                                         curParm = &(rParm->gr[ainfo->reg-2])+offset;
 746                                 }
 747                                 else
 748                                         curParm = sp+ainfo->offset;
 749
 750                                 if (retFitsInReg (ainfo->vtsize))
 751                                         decodeParm(sig->params[i],
 752                                                    curParm,
 753                                                    ainfo->size);
 754                                 else
 755                                         decodeParm(sig->params[i],
 756                                                    *((char **) curParm),
 757                                                    ainfo->vtsize);
 758                                 break;
 759                         case RegTypeStructByAddr :
 760                                 if (ainfo->reg != STK_BASE)
 761                                         curParm = &(rParm->gr[ainfo->reg-2]);
 762                                 else
 763                                         curParm = sp+ainfo->offset;
 764
 765                                 decodeParm(sig->params[i],
 766                                            *((char **) curParm),
 767                                            ainfo->vtsize);
 768                                 break;
 769
 770                         default :
 771                                 printf("???, ");
 772                 }
 773         }
 774         printf("\n");
 775         g_free(cinfo);
 776 }
 777
 778 /*========================= End of Function ========================*/
 779
 780 /*------------------------------------------------------------------*/
 781 /*                                                                  */
 782 /* Name         - leave_method                                      */
 783 /*                                                                  */
 784 /* Function     -                                                   */
 785 /*                                                                  */
 786 /*------------------------------------------------------------------*/
 787
 788 static void
 789 leave_method (MonoMethod *method, ...)
 790 {
 791         MonoType *type;
 792         char *fname;
 793         guint64 ip;
 794         va_list ap;
 795
 796         va_start(ap, method);
 797
 798         fname = mono_method_full_name (method, TRUE);
 799         indent (-1);
 800         printf ("LEAVE: %s", fname);
 801         g_free (fname);
 802
 803         type = mono_method_signature (method)->ret;
 804
 805 handle_enum:
 806         switch (type->type) {
 807         case MONO_TYPE_VOID:
 808                 break;
 809         case MONO_TYPE_BOOLEAN: {
 810                 int val = va_arg (ap, int);
 811                 if (val)
 812                         printf ("[TRUE:%d]", val);
 813                 else
 814                         printf ("[FALSE]");
 815
 816                 break;
 817         }
 818         case MONO_TYPE_CHAR: {
 819                 int val = va_arg (ap, int);
 820                 printf ("[CHAR:%d]", val);
 821                 break;
 822         }
 823         case MONO_TYPE_I1: {
 824                 int val = va_arg (ap, int);
 825                 printf ("[INT1:%d]", val);
 826                 break;
 827         }
 828         case MONO_TYPE_U1: {
 829                 int val = va_arg (ap, int);
 830                 printf ("[UINT1:%d]", val);
 831                 break;
 832         }
 833         case MONO_TYPE_I2: {
 834                 int val = va_arg (ap, int);
 835                 printf ("[INT2:%d]", val);
 836                 break;
 837         }
 838         case MONO_TYPE_U2: {
 839                 int val = va_arg (ap, int);
 840                 printf ("[UINT2:%d]", val);
 841                 break;
 842         }
 843         case MONO_TYPE_I4: {
 844                 int val = va_arg (ap, int);
 845                 printf ("[INT4:%d]", val);
 846                 break;
 847         }
 848         case MONO_TYPE_U4: {
 849                 int val = va_arg (ap, int);
 850                 printf ("[UINT4:%d]", val);
 851                 break;
 852         }
 853         case MONO_TYPE_I: {
 854                 gint64 val = va_arg (ap, gint64);
 855                 printf ("[INT:%ld]", val);
 856                 printf("]");
 857                 break;
 858         }
 859         case MONO_TYPE_U: {
 860                 gint64 val = va_arg (ap, gint64);
 861                 printf ("[UINT:%lu]", val);
 862                 printf("]");
 863                 break;
 864         }
 865         case MONO_TYPE_STRING: {
 866                 MonoString *s = va_arg (ap, MonoString *);
 867 ;
 868                 if (s) {
 869                         g_assert (((MonoObject *)s)->vtable->klass == mono_defaults.string_class);
 870                         printf ("[STRING:%p:%s]", s, mono_string_to_utf8 (s));
 871                 } else
 872                         printf ("[STRING:null], ");
 873                 break;
 874         }
 875         case MONO_TYPE_CLASS:
 876         case MONO_TYPE_OBJECT: {
 877                 MonoObject *o = va_arg (ap, MonoObject *);
 878
 879                 if ((o) && (o->vtable)) {
 880                         if (o->vtable->klass == mono_defaults.boolean_class) {
 881                                 printf ("[BOOLEAN:%p:%d]", o, *((guint8 *)o + sizeof (MonoObject)));
 882                         } else if  (o->vtable->klass == mono_defaults.int32_class) {
 883                                 printf ("[INT32:%p:%d]", o, *((gint32 *)((char *)o + sizeof (MonoObject))));
 884                         } else if  (o->vtable->klass == mono_defaults.int64_class) {
 885                                 printf ("[INT64:%p:%ld]", o, *((gint64 *)((char *)o + sizeof (MonoObject))));
 886                         } else
 887                                 printf ("[%s.%s:%p]", o->vtable->klass->name_space, o->vtable->klass->name, o);
 888                 } else
 889                         printf ("[OBJECT:%p]", o);
 890
 891                 break;
 892         }
 893         case MONO_TYPE_PTR:
 894         case MONO_TYPE_FNPTR:
 895         case MONO_TYPE_ARRAY:
 896         case MONO_TYPE_SZARRAY: {
 897                 gpointer p = va_arg (ap, gpointer);
 898                 printf ("[result=%p]", p);
 899                 break;
 900         }
 901         case MONO_TYPE_I8: {
 902                 gint64 l =  va_arg (ap, gint64);
 903                 printf ("[LONG:%ld]", l);
 904                 break;
 905         }
 906         case MONO_TYPE_U8: {
 907                 guint64 l =  va_arg (ap, guint64);
 908                 printf ("[ULONG:%lu]", l);
 909                 break;
 910         }
 911         case MONO_TYPE_R4: {
 912                 double f = va_arg (ap, double);
 913                 printf ("[FLOAT4:%g]\n", f);
 914                 break;
 915         }
 916         case MONO_TYPE_R8: {
 917                 double f = va_arg (ap, double);
 918                 printf ("[FLOAT8:%g]\n", f);
 919                 break;
 920         }
 921         case MONO_TYPE_VALUETYPE: {
 922                 MonoMarshalType *info;
 923                 if (type->data.klass->enumtype) {
 924                         type = type->data.klass->enum_basetype;
 925                         goto handle_enum;
 926                 } else {
 927                         guint8 *p = va_arg (ap, gpointer);
 928                         int j, size, align;
 929
 930                         info = mono_marshal_load_type_info (type->data.klass);
 931
 932                         if ((info->native_size == sizeof(float)) &&
 933                             (info->num_fields  == 1) &&
 934                             (info->fields[0].field->type->type == MONO_TYPE_R4)) {
 935                                 double f = va_arg (ap, double);
 936                                 printf("[FLOAT4:%g]\n", (double) f);
 937                                 break;
 938                         }
 939
 940                         if ((info->native_size == sizeof(double)) &&
 941                             (info->num_fields  == 1) &&
 942                             (info->fields[0].field->type->type == MONO_TYPE_R8)) {
 943                                 double f = va_arg (ap, double);
 944                                 printf("[FLOAT8:%g]\n", f);
 945                                 break;
 946                         }
 947
 948                         size = mono_type_size (type, &align);
 949                         switch (size) {
 950                         case 1:
 951                         case 2:
 952                         case 4:
 953                         case 8:
 954                                 printf ("[");
 955                                 for (j = 0; p && j < size; j++)
 956                                         printf ("%02x,", p [j]);
 957                                 printf ("]\n");
 958                                 break;
 959                         default:
 960                                 printf ("[VALUETYPE]\n");
 961                         }
 962                 }
 963                 break;
 964         }
 965         case MONO_TYPE_TYPEDBYREF: {
 966                 guint8 *p = va_arg (ap, gpointer);
 967                 int j, size, align;
 968                 size = mono_type_size (type, &align);
 969                 switch (size) {
 970                 case 1:
 971                 case 2:
 972                 case 4:
 973                 case 8:
 974                         printf ("[");
 975                         for (j = 0; p && j < size; j++)
 976                                 printf ("%02x,", p [j]);
 977                         printf ("]\n");
 978                         break;
 979                 default:
 980                         printf ("[TYPEDBYREF]\n");
 981                 }
 982         }
 983                 break;
 984         default:
 985                 printf ("(unknown return type %x)",
 986                         mono_method_signature (method)->ret->type);
 987         }
 988
 989         ip = ((gint64) __builtin_return_address (0));
 990         printf (" ip: %p\n", (gpointer) ip);
 991 }
 992
 993 /*========================= End of Function ========================*/
 994
 995 /*------------------------------------------------------------------*/
 996 /*                                                                  */
 997 /* Name         - catch_SIGILL                                      */
 998 /*                                                                  */
 999 /* Function     - Catch SIGILL as a result of testing for long      */
1000 /*                displacement facility.                            */
1001 /*                                                                  */
1002 /*------------------------------------------------------------------*/
1003
1004 void
1005 catch_SIGILL(int sigNo, siginfo_t *info, void *act) {
1006
1007         has_ld = 0;
1008
1009 }
1010
1011 /*========================= End of Function ========================*/
1012
1013 /*------------------------------------------------------------------*/
1014 /*                                                                  */
1015 /* Name         - mono_arch_cpu_init                                */
1016 /*                                                                  */
1017 /* Function     - Perform CPU specific initialization to execute    */
1018 /*                managed code.                                     */
1019 /*                                                                  */
1020 /*------------------------------------------------------------------*/
1021
1022 void
1023 mono_arch_cpu_init (void)
1024 {
1025         struct sigaction sa,
1026                          *oldSa = NULL;
1027         guint mode = 1;
1028
1029         /*--------------------------------------*/
1030         /* Set default rounding mode for FP     */
1031         /*--------------------------------------*/
1032         __asm__ ("SRNM\t%0\n\t"
1033                 : : "m" (mode));
1034
1035         /*--------------------------------------*/
1036         /* Determine if we have long displace-  */
1037         /* ment facility on this processor      */
1038         /*--------------------------------------*/
1039         sa.sa_sigaction = catch_SIGILL;
1040         sigemptyset (&sa.sa_mask);
1041         sa.sa_flags = SA_SIGINFO;
1042
1043         sigaction (SIGILL, &sa, oldSa);
1044
1045         /*--------------------------------------*/
1046         /* We test by executing the STY inst    */
1047         /*--------------------------------------*/
1048         __asm__ ("LGHI\t0,1\n\t"
1049                  "LA\t1,%0\n\t"
1050                  ".byte\t0xe3,0x00,0x10,0x00,0x00,0x50\n\t"
1051                 : "=m" (has_ld) : : "0", "1");
1052
1053         sigaction (SIGILL, oldSa, NULL);
1054 }
1055
1056 /*========================= End of Function ========================*/
1057
1058
1059 /*
1060  * Initialize architecture specific code.
1061  */
1062 void
1063 mono_arch_init (void)
1064 {
1065 }
1066
1067 /*
1068  * Cleanup architecture specific code.
1069  */
1070 void
1071 mono_arch_cleanup (void)
1072 {
1073 }
1074
1075 /*------------------------------------------------------------------*/
1076 /*                                                                  */
1077 /* Name         - mono_arch_cpu_optimizazions                       */
1078 /*                                                                  */
1079 /* Function     - Returns the optimizations supported on this CPU   */
1080 /*                                                                  */
1081 /*------------------------------------------------------------------*/
1082
1083 guint32
1084 mono_arch_cpu_optimizazions (guint32 *exclude_mask)
1085 {
1086         guint32 opts = 0;
1087
1088         /*----------------------------------------------------------*/
1089         /* No s390-specific optimizations yet                       */
1090         /*----------------------------------------------------------*/
1091         *exclude_mask = MONO_OPT_INLINE|MONO_OPT_LINEARS;
1092 //      *exclude_mask = MONO_OPT_INLINE;
1093         return opts;
1094 }
1095
1096 /*========================= End of Function ========================*/
1097
1098 /*------------------------------------------------------------------*/
1099 /*                                                                  */
1100 /* Name         -                                                   */
1101 /*                                                                  */
1102 /* Function     -                                                   */
1103 /*                                                                  */
1104 /*------------------------------------------------------------------*/
1105
1106 static gboolean
1107 is_regsize_var (MonoType *t) {
1108         if (t->byref)
1109                 return TRUE;
1110         switch (mono_type_get_underlying_type (t)->type) {
1111         case MONO_TYPE_I4:
1112         case MONO_TYPE_U4:
1113         case MONO_TYPE_I:
1114         case MONO_TYPE_I8:
1115         case MONO_TYPE_U8:
1116         case MONO_TYPE_U:
1117         case MONO_TYPE_PTR:
1118         case MONO_TYPE_FNPTR:
1119                 return TRUE;
1120         case MONO_TYPE_OBJECT:
1121         case MONO_TYPE_STRING:
1122         case MONO_TYPE_CLASS:
1123         case MONO_TYPE_SZARRAY:
1124         case MONO_TYPE_ARRAY:
1125                 return FALSE;
1126         case MONO_TYPE_VALUETYPE:
1127                 if (t->data.klass->enumtype)
1128                         return is_regsize_var (t->data.klass->enum_basetype);
1129                 return FALSE;
1130         }
1131         return FALSE;
1132 }
1133
1134 /*========================= End of Function ========================*/
1135
1136 /*------------------------------------------------------------------*/
1137 /*                                                                  */
1138 /* Name         - mono_arch_get_allocatable_int_vars                */
1139 /*                                                                  */
1140 /* Function     -                                                   */
1141 /*                                                                  */
1142 /*------------------------------------------------------------------*/
1143
1144 GList *
1145 mono_arch_get_allocatable_int_vars (MonoCompile *cfg)
1146 {
1147         GList *vars = NULL;
1148         int i;
1149
1150         for (i = 0; i < cfg->num_varinfo; i++) {
1151                 MonoInst *ins = cfg->varinfo [i];
1152                 MonoMethodVar *vmv = MONO_VARINFO (cfg, i);
1153
1154                 /* unused vars */
1155                 if (vmv->range.first_use.abs_pos >= vmv->range.last_use.abs_pos)
1156                         continue;
1157
1158                 if (ins->flags & (MONO_INST_VOLATILE|MONO_INST_INDIRECT) ||
1159                     (ins->opcode != OP_LOCAL && ins->opcode != OP_ARG))
1160                         continue;
1161
1162                 /* we can only allocate 32 bit values */
1163                 if (is_regsize_var (ins->inst_vtype)) {
1164                         g_assert (MONO_VARINFO (cfg, i)->reg == -1);
1165                         g_assert (i == vmv->idx);
1166                         vars = mono_varlist_insert_sorted (cfg, vars, vmv, FALSE);
1167                 }
1168         }
1169
1170         return vars;
1171 }
1172
1173 /*========================= End of Function ========================*/
1174
1175 /*------------------------------------------------------------------*/
1176 /*                                                                  */
1177 /* Name         - mono_arch_global_int_regs                         */
1178 /*                                                                  */
1179 /* Function     - Return a list of usable integer registers.        */
1180 /*                                                                  */
1181 /*------------------------------------------------------------------*/
1182
1183 GList *
1184 mono_arch_get_global_int_regs (MonoCompile *cfg)
1185 {
1186         GList *regs = NULL;
1187         MonoMethodHeader *header;
1188         int i, top = 13;
1189
1190         header = mono_method_get_header (cfg->method);
1191         if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
1192                 cfg->frame_reg = s390_r11;
1193
1194         for (i = 8; i < top; ++i) {
1195                 if (cfg->frame_reg != i)
1196                         regs = g_list_prepend (regs, GUINT_TO_POINTER (i));
1197         }
1198
1199         return regs;
1200 }
1201
1202 /*========================= End of Function ========================*/
1203
1204 /*------------------------------------------------------------------*/
1205 /*                                                                  */
1206 /* Name         -  mono_arch_flush_icache                           */
1207 /*                                                                  */
1208 /* Function     -  Flush the CPU icache.                            */
1209 /*                                                                  */
1210 /*------------------------------------------------------------------*/
1211
1212 void
1213 mono_arch_flush_icache (guint8 *code, gint size)
1214 {
1215 }
1216
1217 /*========================= End of Function ========================*/
1218
1219 /*------------------------------------------------------------------*/
1220 /*                                                                  */
1221 /* Name         - add_general                                       */
1222 /*                                                                  */
1223 /* Function     - Determine code and stack size incremements for a  */
1224 /*                parameter.                                        */
1225 /*                                                                  */
1226 /*------------------------------------------------------------------*/
1227
1228 static void inline
1229 add_general (guint *gr, size_data *sz, ArgInfo *ainfo)
1230 {
1231         if (*gr > S390_LAST_ARG_REG) {
1232                 sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1233                 ainfo->offset   = sz->stack_size;
1234                 ainfo->reg      = STK_BASE;
1235                 ainfo->regtype  = RegTypeBase;
1236                 sz->stack_size += sizeof(long);
1237                 sz->local_size += sizeof(long);
1238                 sz->offStruct  += sizeof(long);
1239                 sz->code_size  += 12;
1240         } else {
1241                 ainfo->reg      = *gr;
1242                 sz->code_size  += 8;
1243         }
1244         (*gr) ++;
1245 }
1246
1247 /*========================= End of Function ========================*/
1248
1249 /*------------------------------------------------------------------*/
1250 /*                                                                  */
1251 /* Name         - add_stackParm                                     */
1252 /*                                                                  */
1253 /* Function     - Determine code and stack size incremements for a  */
1254 /*                parameter.                                        */
1255 /*                                                                  */
1256 /*------------------------------------------------------------------*/
1257
1258 static void inline
1259 add_stackParm (guint *gr, size_data *sz, ArgInfo *ainfo, gint size)
1260 {
1261         if (*gr > S390_LAST_ARG_REG) {
1262                 sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1263                 ainfo->reg      = STK_BASE;
1264                 sz->stack_size += sizeof(gpointer);
1265                 sz->offStruct  += sizeof(gpointer);
1266         } else {
1267                 ainfo->reg      = *gr;
1268         }
1269         (*gr) ++;
1270         ainfo->offset   = sz->stack_size;
1271         ainfo->offparm  = sz->offset;
1272         sz->offset      = S390_ALIGN(sz->offset+size, sizeof(long));
1273         ainfo->size     = size;
1274         ainfo->regtype  = RegTypeStructByAddr;
1275         ainfo->vtsize   = size;
1276         sz->parm_size  += size;
1277 }
1278
1279 /*========================= End of Function ========================*/
1280
1281 /*------------------------------------------------------------------*/
1282 /*                                                                  */
1283 /* Name         - add_float                                         */
1284 /*                                                                  */
1285 /* Function     - Determine code and stack size incremements for a  */
1286 /*                float parameter.                                  */
1287 /*                                                                  */
1288 /*------------------------------------------------------------------*/
1289
1290 static void inline
1291 add_float (guint *fr,  size_data *sz, ArgInfo *ainfo)
1292 {
1293         if ((*fr) <= S390_LAST_FPARG_REG) {
1294                 ainfo->regtype = RegTypeFP;
1295                 ainfo->reg     = *fr;
1296                 sz->code_size += 4;
1297                 (*fr) += 2;
1298         }
1299         else {
1300                 ainfo->offset   = sz->stack_size;
1301                 ainfo->reg      = STK_BASE;
1302                 ainfo->regtype  = RegTypeBase;
1303                 sz->code_size  += 4;
1304                 sz->stack_size += sizeof(double);
1305                 sz->local_size += sizeof(double);
1306                 sz->offStruct  += sizeof(double);
1307         }
1308 }
1309
1310 /*========================= End of Function ========================*/
1311
1312 /*------------------------------------------------------------------*/
1313 /*                                                                  */
1314 /* Name         - calculate_sizes                                   */
1315 /*                                                                  */
1316 /* Function     - Determine the amount of space required for code   */
1317 /*                and stack. In addition determine starting points  */
1318 /*                for stack-based parameters, and area for struct-  */
1319 /*                ures being returned on the stack.                 */
1320 /*                                                                  */
1321 /*------------------------------------------------------------------*/
1322
1323 static CallInfo *
1324 calculate_sizes (MonoMethodSignature *sig, size_data *sz,
1325                  gboolean string_ctor)
1326 {
1327         guint i, fr, gr, size;
1328         int nParm = sig->hasthis + sig->param_count;
1329         guint32 simpletype, align;
1330         CallInfo *cinfo = g_malloc0 (sizeof (CallInfo) + sizeof (ArgInfo) * nParm);
1331
1332         fr                = 0;
1333         gr                = s390_r2;
1334         nParm             = 0;
1335         cinfo->struct_ret = 0;
1336         sz->retStruct     = 0;
1337         sz->offset        = 0;
1338         sz->offStruct     = S390_MINIMAL_STACK_SIZE;
1339         sz->stack_size    = S390_MINIMAL_STACK_SIZE;
1340         sz->code_size     = 0;
1341         sz->parm_size     = 0;
1342         sz->local_size    = 0;
1343
1344         /*----------------------------------------------------------*/
1345         /* We determine the size of the return code/stack in case we*/
1346         /* need to reserve a register to be used to address a stack */
1347         /* area that the callee will use.                           */
1348         /*----------------------------------------------------------*/
1349
1350         simpletype = mono_type_get_underlying_type (sig->ret)->type;
1351 enum_retvalue:
1352         switch (simpletype) {
1353                 case MONO_TYPE_BOOLEAN:
1354                 case MONO_TYPE_I1:
1355                 case MONO_TYPE_U1:
1356                 case MONO_TYPE_I2:
1357                 case MONO_TYPE_U2:
1358                 case MONO_TYPE_CHAR:
1359                 case MONO_TYPE_I4:
1360                 case MONO_TYPE_U4:
1361                 case MONO_TYPE_I:
1362                 case MONO_TYPE_U:
1363                 case MONO_TYPE_CLASS:
1364                 case MONO_TYPE_OBJECT:
1365                 case MONO_TYPE_SZARRAY:
1366                 case MONO_TYPE_ARRAY:
1367                 case MONO_TYPE_PTR:
1368                 case MONO_TYPE_FNPTR:
1369                 case MONO_TYPE_STRING:
1370                         cinfo->ret.reg = s390_r2;
1371                         sz->code_size += 4;
1372                         break;
1373                 case MONO_TYPE_R4:
1374                 case MONO_TYPE_R8:
1375                         cinfo->ret.reg = s390_f0;
1376                         sz->code_size += 4;
1377                         break;
1378                 case MONO_TYPE_I8:
1379                 case MONO_TYPE_U8:
1380                         cinfo->ret.reg = s390_r2;
1381                         sz->code_size += 4;
1382                         break;
1383                 case MONO_TYPE_GENERICINST:
1384                         if (!mono_type_generic_inst_is_valuetype (sig->ret)) {
1385                                 cinfo->ret.reg = s390_r2;
1386                                 sz->code_size += 4;
1387                                 break;
1388                         }
1389                         /* Fall through */
1390                 case MONO_TYPE_VALUETYPE: {
1391                         MonoClass *klass = mono_class_from_mono_type (sig->ret);
1392                         if (klass->enumtype) {
1393                                 simpletype = klass->enum_basetype->type;
1394                                 goto enum_retvalue;
1395                         }
1396                         if (sig->pinvoke)
1397                                 size = mono_class_native_size (klass, &align);
1398                         else
1399                                 size = mono_class_value_size (klass, &align);
1400
1401                         cinfo->ret.reg    = s390_r2;
1402                         cinfo->struct_ret = 1;
1403                         cinfo->ret.size   = size;
1404                         cinfo->ret.vtsize = size;
1405                         gr++;
1406                         break;
1407                 }
1408                 case MONO_TYPE_TYPEDBYREF:
1409                         size = sizeof (MonoTypedRef);
1410                         cinfo->ret.reg    = s390_r2;
1411                         cinfo->struct_ret = 1;
1412                         cinfo->ret.size   = size;
1413                         cinfo->ret.vtsize = size;
1414                         gr++;
1415                         break;
1416                 case MONO_TYPE_VOID:
1417                         break;
1418                 default:
1419                         g_error ("Can't handle as return value 0x%x", sig->ret->type);
1420         }
1421
1422         if (sig->hasthis) {
1423                 cinfo->args[nParm].size = sizeof(gpointer);
1424                 add_general (&gr, sz, cinfo->args+nParm);
1425                 nParm++;
1426         }
1427
1428         /*----------------------------------------------------------*/
1429         /* We determine the size of the parameter code and stack    */
1430         /* requirements by checking the types and sizes of the      */
1431         /* parameters.                                              */
1432         /*----------------------------------------------------------*/
1433
1434         for (i = 0; i < sig->param_count; ++i) {
1435                 /*--------------------------------------------------*/
1436                 /* Handle vararg type calls. All args are put on    */
1437                 /* the stack.                                       */
1438                 /*--------------------------------------------------*/
1439                 if ((sig->call_convention == MONO_CALL_VARARG) &&
1440                     (i == sig->sentinelpos)) {
1441                         gr = S390_LAST_ARG_REG + 1;
1442                         add_general (&gr, sz, &cinfo->sigCookie);
1443                 }
1444
1445                 if (sig->params [i]->byref) {
1446                         add_general (&gr, sz, cinfo->args+nParm);
1447                         cinfo->args[nParm].size = sizeof(gpointer);
1448                         nParm++;
1449                         continue;
1450                 }
1451
1452                 simpletype = mono_type_get_underlying_type(sig->params [i])->type;
1453                 cinfo->args[nParm].type = simpletype;
1454                 switch (simpletype) {
1455                 case MONO_TYPE_BOOLEAN:
1456                 case MONO_TYPE_I1:
1457                 case MONO_TYPE_U1:
1458                         cinfo->args[nParm].size = sizeof(char);
1459                         add_general (&gr, sz, cinfo->args+nParm);
1460                         nParm++;
1461                         break;
1462                 case MONO_TYPE_I2:
1463                 case MONO_TYPE_U2:
1464                 case MONO_TYPE_CHAR:
1465                         cinfo->args[nParm].size = sizeof(short);
1466                         add_general (&gr, sz, cinfo->args+nParm);
1467                         nParm++;
1468                         break;
1469                 case MONO_TYPE_I4:
1470                 case MONO_TYPE_U4:
1471                         cinfo->args[nParm].size = sizeof(int);
1472                         add_general (&gr, sz, cinfo->args+nParm);
1473                         nParm++;
1474                         break;
1475                 case MONO_TYPE_I:
1476                 case MONO_TYPE_U:
1477                 case MONO_TYPE_PTR:
1478                 case MONO_TYPE_FNPTR:
1479                 case MONO_TYPE_CLASS:
1480                 case MONO_TYPE_OBJECT:
1481                 case MONO_TYPE_STRING:
1482                 case MONO_TYPE_SZARRAY:
1483                 case MONO_TYPE_ARRAY:
1484                         cinfo->args[nParm].size = sizeof(gpointer);
1485                         add_general (&gr, sz, cinfo->args+nParm);
1486                         nParm++;
1487                         break;
1488                 case MONO_TYPE_I8:
1489                 case MONO_TYPE_U8:
1490                         cinfo->args[nParm].size = sizeof(long long);
1491                         add_general (&gr, sz, cinfo->args+nParm);
1492                         nParm++;
1493                         break;
1494                 case MONO_TYPE_R4:
1495                         cinfo->args[nParm].size = sizeof(float);
1496                         add_float (&fr, sz, cinfo->args+nParm);
1497                         nParm++;
1498                         break;
1499                 case MONO_TYPE_R8:
1500                         cinfo->args[nParm].size = sizeof(double);
1501                         add_float (&fr, sz, cinfo->args+nParm);
1502                         nParm++;
1503                         break;
1504                 case MONO_TYPE_GENERICINST:
1505                         if (!mono_type_generic_inst_is_valuetype (sig->params [i])) {
1506                                 cinfo->args[nParm].size = sizeof(gpointer);
1507                                 add_general (&gr, sz, cinfo->args+nParm);
1508                                 nParm++;
1509                                 break;
1510                         }
1511                         /* Fall through */
1512                 case MONO_TYPE_VALUETYPE: {
1513                         MonoMarshalType *info;
1514                         MonoClass *klass = mono_class_from_mono_type (sig->params [i]);
1515                         if (sig->pinvoke)
1516                                 size = mono_class_native_size (klass, &align);
1517                         else
1518                                 size = mono_class_value_size (klass, &align);
1519
1520                         info = mono_marshal_load_type_info (klass);
1521
1522                         if ((info->native_size == sizeof(float)) &&
1523                             (info->num_fields  == 1) &&
1524                             (info->fields[0].field->type->type == MONO_TYPE_R4)) {
1525                                 cinfo->args[nParm].size = sizeof(float);
1526                                 add_float(&fr, sz, cinfo->args+nParm);
1527                                 break;
1528                         }
1529
1530                         if ((info->native_size == sizeof(double)) &&
1531                             (info->num_fields  == 1) &&
1532                             (info->fields[0].field->type->type == MONO_TYPE_R8)) {
1533                                 cinfo->args[nParm].size = sizeof(double);
1534                                 add_float(&fr, sz, cinfo->args+nParm);
1535                                 break;
1536                         }
1537
1538                         cinfo->args[nParm].vtsize  = 0;
1539                         cinfo->args[nParm].size    = 0;
1540
1541                         switch (size) {
1542                                 /*----------------------------------*/
1543                                 /* On S/390, structures of size 1,  */
1544                                 /* 2, 4, and 8 bytes are passed in  */
1545                                 /* (a) register(s).                 */
1546                                 /*----------------------------------*/
1547                                 case 0:
1548                                 case 1:
1549                                 case 2:
1550                                 case 4:
1551                                 case 8:
1552                                         add_general(&gr, sz, cinfo->args+nParm);
1553                                         cinfo->args[nParm].size    = size;
1554                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1555                                         nParm++;
1556                                         sz->local_size            += sizeof(long);
1557                                         break;
1558                                 default:
1559                                         add_stackParm(&gr, sz, cinfo->args+nParm, size);
1560                                         nParm++;
1561                         }
1562                 }
1563                         break;
1564                 case MONO_TYPE_TYPEDBYREF: {
1565                         int size = sizeof (MonoTypedRef);
1566
1567                         cinfo->args[nParm].vtsize  = 0;
1568                         cinfo->args[nParm].size    = 0;
1569
1570                         switch (size) {
1571                                 /*----------------------------------*/
1572                                 /* On S/390, structures of size 1,  */
1573                                 /* 2, 4, and 8 bytes are passed in  */
1574                                 /* (a) register(s).                 */
1575                                 /*----------------------------------*/
1576                                 case 0:
1577                                 case 1:
1578                                 case 2:
1579                                 case 4:
1580                                 case 8:
1581                                         add_general(&gr, sz, cinfo->args+nParm);
1582                                         cinfo->args[nParm].size    = size;
1583                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1584                                         nParm++;
1585                                         sz->local_size            += sizeof(long);
1586                                         break;
1587                                 default:
1588                                         add_stackParm(&gr, sz, cinfo->args+nParm, size);
1589                                         nParm++;
1590                         }
1591                 }
1592                         break;
1593                 default:
1594                         g_error ("Can't trampoline 0x%x", sig->params [i]->type);
1595                 }
1596         }
1597
1598         /*----------------------------------------------------------*/
1599         /* Handle the case where there are no implicit arguments    */
1600         /*----------------------------------------------------------*/
1601         if ((sig->call_convention == MONO_CALL_VARARG) &&
1602             (sig->param_count == sig->sentinelpos)) {
1603                 gr = S390_LAST_ARG_REG + 1;
1604                 add_general (&gr, sz, &cinfo->sigCookie);
1605         }
1606
1607         /*----------------------------------------------------------*/
1608         /* If we are passing a structure back then if it won't be   */
1609         /* in a register(s) then we make room at the end of the     */
1610         /* parameters that may have been placed on the stack        */
1611         /*----------------------------------------------------------*/
1612         if (cinfo->struct_ret) {
1613                 cinfo->ret.offset = sz->stack_size;
1614                 switch (cinfo->ret.size) {
1615                 case 0:
1616                 case 1:
1617                 case 2:
1618                 case 4:
1619                 case 8:
1620                         break;
1621                 default:
1622                         sz->stack_size   += S390_ALIGN(cinfo->ret.size, align);
1623                 }
1624         }
1625
1626         cinfo->lastgr   = gr;
1627         sz->stack_size  = sz->stack_size + sz->local_size + sz->parm_size +
1628                           sz->offset;
1629         sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1630
1631         return (cinfo);
1632 }
1633
1634 /*========================= End of Function ========================*/
1635
1636 /*------------------------------------------------------------------*/
1637 /*                                                                  */
1638 /* Name         - mono_arch_allocate_vars                           */
1639 /*                                                                  */
1640 /* Function     - Set var information according to the calling      */
1641 /*                convention for S/390. The local var stuff should  */
1642 /*                most likely be split in another method.           */
1643 /*                                                                  */
1644 /* Parameter    - @m - Compile unit.                                */
1645 /*                                                                  */
1646 /*------------------------------------------------------------------*/
1647
1648 void
1649 mono_arch_allocate_vars (MonoCompile *cfg)
1650 {
1651         MonoMethodSignature *sig;
1652         MonoMethodHeader *header;
1653         MonoInst *inst;
1654         CallInfo *cinfo;
1655         size_data sz;
1656         int iParm, iVar, offset, size, align, curinst;
1657         int frame_reg = STK_BASE;
1658         int sArg, eArg;
1659
1660         header  = mono_method_get_header (cfg->method);
1661
1662         cfg->flags |= MONO_CFG_HAS_SPILLUP;
1663
1664         /*---------------------------------------------------------*/
1665         /* We use the frame register also for any method that has  */
1666         /* filter clauses. This way, when the handlers are called, */
1667         /* the code will reference local variables using the frame */
1668         /* reg instead of the stack pointer: if we had to restore  */
1669         /* the stack pointer, we'd corrupt the method frames that  */
1670         /* are already on the stack (since filters get called      */
1671         /* before stack unwinding happens) when the filter code    */
1672         /* would call any method.                                  */
1673         /*---------------------------------------------------------*/
1674         if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
1675                 frame_reg = s390_r11;
1676
1677         cfg->frame_reg = frame_reg;
1678
1679         if (frame_reg != STK_BASE)
1680                 cfg->used_int_regs |= 1 << frame_reg;
1681
1682         sig     = mono_method_signature (cfg->method);
1683
1684         cinfo   = calculate_sizes (sig, &sz, sig->pinvoke);
1685
1686         if (cinfo->struct_ret) {
1687                 cfg->ret->opcode = OP_REGVAR;
1688                 cfg->ret->inst_c0 = s390_r2;
1689         } else {
1690                 switch (mono_type_get_underlying_type (sig->ret)->type) {
1691                 case MONO_TYPE_VOID:
1692                         break;
1693                 default:
1694                         cfg->ret->opcode = OP_REGVAR;
1695                         cfg->ret->dreg   = s390_r2;
1696                         break;
1697                 }
1698         }
1699
1700         /*--------------------------------------------------------------*/
1701         /* local vars are at a positive offset from the stack pointer   */
1702         /* also note that if the function uses alloca, we use s390_r11  */
1703         /* to point at the local variables.                             */
1704         /* add parameter area size for called functions                 */
1705         /*--------------------------------------------------------------*/
1706         offset          = (cfg->param_area + S390_MINIMAL_STACK_SIZE);
1707         cfg->sig_cookie = 0;
1708
1709         if (cinfo->struct_ret) {
1710                 inst               = cfg->ret;
1711                 offset             = S390_ALIGN(offset, sizeof(gpointer));
1712                 inst->inst_offset  = offset;
1713                 inst->opcode       = OP_REGOFFSET;
1714                 inst->inst_basereg = frame_reg;
1715                 offset            += sizeof(gpointer);
1716                 if ((sig->call_convention == MONO_CALL_VARARG) &&
1717                     (!retFitsInReg (cinfo->ret.size)))
1718                         cfg->sig_cookie += cinfo->ret.size;
1719         }
1720
1721         if (sig->hasthis) {
1722                 inst = cfg->args [0];
1723                 if (inst->opcode != OP_REGVAR) {
1724                         inst->opcode       = OP_REGOFFSET;
1725                         inst->inst_basereg = frame_reg;
1726                         offset             = S390_ALIGN(offset, sizeof(gpointer));
1727                         inst->inst_offset  = offset;
1728                         offset            += sizeof (gpointer);
1729                 }
1730                 curinst = sArg = 1;
1731         } else {
1732                 curinst = sArg = 0;
1733         }
1734
1735         eArg = sig->param_count + sArg;
1736
1737         if (sig->call_convention == MONO_CALL_VARARG)
1738                 cfg->sig_cookie += S390_MINIMAL_STACK_SIZE;
1739
1740         for (iParm = sArg; iParm < eArg; ++iParm) {
1741                 inst = cfg->args [curinst];
1742                 if (inst->opcode != OP_REGVAR) {
1743                         switch (cinfo->args[iParm].regtype) {
1744                                 case RegTypeStructByAddr :
1745                                 if (cinfo->args[iParm].reg == STK_BASE) {
1746                                         inst->opcode       = OP_S390_LOADARG;
1747                                         inst->inst_basereg = frame_reg;
1748                                         offset             = S390_ALIGN(offset, sizeof(long));
1749                                         inst->inst_offset  = offset;
1750                                         size               = abs(cinfo->args[iParm].vtsize);
1751                                         inst->backend.arg_info     = cinfo->args[iParm].offset;
1752                                 } else {
1753                                         inst->opcode       = OP_S390_ARGREG;
1754                                         inst->inst_basereg = frame_reg;
1755                                         size               = sizeof(gpointer);
1756                                         offset             = S390_ALIGN(offset, size);
1757                                         inst->inst_offset  = offset;
1758                                         inst->backend.arg_info     = cinfo->args[iParm].offset;
1759                                 }
1760                                         break;
1761                                 case RegTypeStructByVal :
1762                                         inst->opcode       = OP_S390_ARGPTR;
1763                                         inst->inst_basereg = frame_reg;
1764                                         size               = cinfo->args[iParm].size;
1765                                         offset             = S390_ALIGN(offset, size);
1766                                         inst->inst_offset  = offset;
1767                                         inst->backend.arg_info     = cinfo->args[iParm].offset;
1768                                         break;
1769                                 default :
1770                                 if (cinfo->args[iParm].reg != STK_BASE) {
1771                                         inst->opcode       = OP_REGOFFSET;
1772                                         inst->inst_basereg = frame_reg;
1773                                         size               = (cinfo->args[iParm].size < 8
1774                                                               ? sizeof(int)
1775                                                               : sizeof(long));
1776                                         offset             = S390_ALIGN(offset, size);
1777                                         inst->inst_offset  = offset;
1778                                 } else {
1779                                         inst->opcode       = OP_S390_STKARG;
1780                                         inst->inst_basereg = frame_reg;
1781                                         size               = ((cinfo->args[iParm].size < 8)
1782                                                               ? 8 - cinfo->args[iParm].size
1783                                                               : 0);
1784                                         inst->inst_offset  = cinfo->args[iParm].offset +
1785                                                              size;
1786                                         inst->backend.arg_info       = 0;
1787                                         size               = sizeof(long);
1788                                 }
1789                         }
1790                         if ((sig->call_convention == MONO_CALL_VARARG) &&
1791                             (cinfo->args[iParm].regtype != RegTypeGeneral) &&
1792                             (iParm < sig->sentinelpos))
1793                                 cfg->sig_cookie += size;
1794
1795                         offset += size;
1796                 }
1797                 curinst++;
1798         }
1799
1800         curinst = cfg->locals_start;
1801         for (iVar = curinst; iVar < cfg->num_varinfo; ++iVar) {
1802                 inst = cfg->varinfo [iVar];
1803                 if ((inst->flags & MONO_INST_IS_DEAD) ||
1804                     (inst->opcode == OP_REGVAR))
1805                         continue;
1806
1807                 /*--------------------------------------------------*/
1808                 /* inst->backend.is_pinvoke indicates native sized value types, */
1809                 /* this is used by the pinvoke wrappers when they   */
1810                 /* call functions returning structure               */
1811                 /*--------------------------------------------------*/
1812                 if (inst->backend.is_pinvoke && MONO_TYPE_ISSTRUCT (inst->inst_vtype))
1813                         size = mono_class_native_size (mono_class_from_mono_type(inst->inst_vtype), &align);
1814                 else
1815                         size = mono_type_size (inst->inst_vtype, &align);
1816
1817                 offset             = S390_ALIGN(offset, align);
1818                 inst->inst_offset  = offset;
1819                 inst->opcode       = OP_REGOFFSET;
1820                 inst->inst_basereg = frame_reg;
1821                 offset            += size;
1822                 DEBUG (g_print("allocating local %d to %ld, size: %d\n",
1823                                 iVar, inst->inst_offset, size));
1824         }
1825
1826         /*------------------------------------------------------*/
1827         /* Allow space for the trace method stack area if needed*/
1828         /*------------------------------------------------------*/
1829         if (mono_jit_trace_calls != NULL && mono_trace_eval (cfg->method))
1830                 offset += S390_TRACE_STACK_SIZE;
1831
1832         /*------------------------------------------------------*/
1833         /* Reserve space to save LMF and caller saved registers */
1834         /*------------------------------------------------------*/
1835         if (cfg->method->save_lmf)
1836                 offset += sizeof (MonoLMF);
1837
1838         /*------------------------------------------------------*/
1839         /* align the offset                                     */
1840         /*------------------------------------------------------*/
1841         cfg->stack_offset = S390_ALIGN(offset, S390_STACK_ALIGNMENT);
1842
1843 }
1844
1845 /*========================= End of Function ========================*/
1846
1847 /*------------------------------------------------------------------*/
1848 /*                                                                  */
1849 /* Name         - mono_arch_call_opcode                             */
1850 /*                                                                  */
1851 /* Function     - Take the arguments and generate the arch-specific */
1852 /*                instructions to properly call the function. This  */
1853 /*                includes pushing, moving argments to the correct  */
1854 /*                etc.                                              */
1855 /*                                                                  */
1856 /*------------------------------------------------------------------*/
1857
1858 MonoCallInst*
1859 mono_arch_call_opcode (MonoCompile *cfg, MonoBasicBlock* bb,
1860                        MonoCallInst *call, int is_virtual) {
1861         MonoInst *in;
1862         MonoCallArgParm *arg;
1863         MonoMethodSignature *sig;
1864         int i, n, lParamArea;
1865         CallInfo *cinfo;
1866         ArgInfo *ainfo;
1867         size_data sz;
1868
1869         sig = call->signature;
1870         n = sig->param_count + sig->hasthis;
1871         DEBUG (g_print ("Call requires: %d parameters\n",n));
1872
1873         cinfo = calculate_sizes (sig, &sz, sig->pinvoke);
1874
1875         call->stack_usage = MAX(sz.stack_size, call->stack_usage);
1876         lParamArea        = MAX((call->stack_usage - S390_MINIMAL_STACK_SIZE - sz.parm_size), 0);
1877         cfg->param_area   = MAX (((signed) cfg->param_area), lParamArea);
1878         cfg->flags       |= MONO_CFG_HAS_CALLS;
1879
1880         if (cinfo->struct_ret)
1881                 call->used_iregs |= 1 << cinfo->ret.reg;
1882
1883         for (i = 0; i < n; ++i) {
1884                 ainfo = cinfo->args + i;
1885
1886                 if (!(sig->pinvoke) &&
1887                     (sig->call_convention == MONO_CALL_VARARG) &&
1888                     (i == sig->sentinelpos)) {
1889                         emit_sig_cookie (cfg, call, cinfo, ainfo->size);
1890                 }
1891
1892                 if (is_virtual && i == 0) {
1893                         /* the argument will be attached to the call instrucion */
1894                         in = call->args [i];
1895                         call->used_iregs |= 1 << ainfo->reg;
1896                 } else {
1897                         MONO_INST_NEW_CALL_ARG (cfg, arg, OP_OUTARG);
1898                         in                  = call->args [i];
1899                         arg->ins.cil_code   = in->cil_code;
1900                         arg->ins.inst_left  = in;
1901                         arg->ins.type       = in->type;
1902                         MONO_INST_LIST_ADD_TAIL (&arg->ins.node, &call->out_args);
1903                         arg->ins.inst_right = (MonoInst *) call;
1904                         if (ainfo->regtype == RegTypeGeneral) {
1905                                 arg->ins.backend.reg3 = ainfo->reg;
1906                                 call->used_iregs |= 1 << ainfo->reg;
1907                         } else if (ainfo->regtype == RegTypeStructByAddr) {
1908                                 call->used_iregs |= 1 << ainfo->reg;
1909                                 arg->ins.sreg1    = ainfo->reg;
1910                                 arg->ins.opcode   = OP_OUTARG_VT;
1911                                 arg->size         = -ainfo->vtsize;
1912                                 arg->offset       = ainfo->offset;
1913                                 arg->offPrm       = ainfo->offparm + sz.offStruct;
1914                         } else if (ainfo->regtype == RegTypeStructByVal) {
1915                                 if (ainfo->reg != STK_BASE)
1916                                         call->used_iregs |= 1 << ainfo->reg;
1917                                 arg->ins.sreg1  = ainfo->reg;
1918                                 arg->ins.opcode = OP_OUTARG_VT;
1919                                 arg->size       = ainfo->size;
1920                                 arg->offset     = ainfo->offset;
1921                                 arg->offPrm     = ainfo->offparm + sz.offStruct;
1922                         } else if (ainfo->regtype == RegTypeBase) {
1923                                 arg->ins.opcode   = OP_OUTARG_MEMBASE;
1924                                 arg->ins.sreg1    = ainfo->reg;
1925                                 arg->size         = ainfo->size;
1926                                 arg->offset       = ainfo->offset;
1927                                 call->used_iregs |= 1 << ainfo->reg;
1928                         } else if (ainfo->regtype == RegTypeFP) {
1929                                 arg->ins.backend.reg3 = ainfo->reg;
1930                                 call->used_fregs |= 1 << ainfo->reg;
1931                                 if (ainfo->size == 4)
1932                                         arg->ins.opcode = OP_OUTARG_R4;
1933                                 else
1934                                         arg->ins.opcode = OP_OUTARG_R8;
1935                         } else {
1936                                 g_assert_not_reached ();
1937                         }
1938                 }
1939         }
1940
1941         /*
1942          * Handle the case where there are no implicit arguments
1943          */
1944         if (!(sig->pinvoke) &&
1945             (sig->call_convention == MONO_CALL_VARARG) &&
1946             (n == sig->sentinelpos)) {
1947                 emit_sig_cookie (cfg, call, cinfo, sizeof(MonoType *));
1948         }
1949
1950         g_free (cinfo);
1951         return call;
1952 }
1953
1954 /*========================= End of Function ========================*/
1955
1956 /*------------------------------------------------------------------*/
1957 /*                                                                  */
1958 /* Name         - emit_sig_cookie.                                  */
1959 /*                                                                  */
1960 /* Function     - For variable length parameter lists construct a   */
1961 /*                signature cookie and emit it.                     */
1962 /*                                                                  */
1963 /*------------------------------------------------------------------*/
1964
1965 static void
1966 emit_sig_cookie (MonoCompile *cfg, MonoCallInst *call,
1967                  CallInfo *cinfo, int argSize)
1968 {
1969         MonoCallArgParm *arg;
1970         MonoMethodSignature *tmpSig;
1971         MonoInst *sigArg;
1972
1973         cfg->disable_aot = TRUE;
1974
1975         /*----------------------------------------------------------*/
1976         /* mono_ArgIterator_Setup assumes the signature cookie is   */
1977         /* passed first and all the arguments which were before it  */
1978         /* passed on the stack after the signature. So compensate   */
1979         /* by passing a different signature.                        */
1980         /*----------------------------------------------------------*/
1981         tmpSig = mono_metadata_signature_dup (call->signature);
1982         tmpSig->param_count -= call->signature->sentinelpos;
1983         tmpSig->sentinelpos  = 0;
1984         if (tmpSig->param_count > 0)
1985                 memcpy (tmpSig->params,
1986                         call->signature->params + call->signature->sentinelpos,
1987                         tmpSig->param_count * sizeof(MonoType *));
1988
1989         MONO_INST_NEW (cfg, sigArg, OP_ICONST);
1990         sigArg->inst_p0 = tmpSig;
1991
1992         MONO_INST_NEW_CALL_ARG (cfg, arg, OP_OUTARG_MEMBASE);
1993         arg->ins.inst_left   = sigArg;
1994         arg->ins.inst_right  = (MonoInst *) call;
1995         arg->size            = argSize;
1996         arg->offset          = cinfo->sigCookie.offset;
1997         MONO_INST_LIST_ADD_TAIL (&arg->ins.node, &call->out_args);
1998 }
1999
2000 /*========================= End of Function ========================*/
2001
2002 /*------------------------------------------------------------------*/
2003 /*                                                                  */
2004 /* Name         - mono_arch_instrument_mem_needs                    */
2005 /*                                                                  */
2006 /* Function     - Allow tracing to work with this interface (with   */
2007 /*                an optional argument).                            */
2008 /*                                                                  */
2009 /*------------------------------------------------------------------*/
2010
2011 void
2012 mono_arch_instrument_mem_needs (MonoMethod *method, int *stack, int *code)
2013 {
2014         /* no stack room needed now (may be needed for FASTCALL-trace support) */
2015         *stack = 0;
2016         /* split prolog-epilog requirements? */
2017         *code = 50; /* max bytes needed: check this number */
2018 }
2019
2020 /*========================= End of Function ========================*/
2021
2022 /*------------------------------------------------------------------*/
2023 /*                                                                  */
2024 /* Name         - mono_arch_instrument_prolog                       */
2025 /*                                                                  */
2026 /* Function     - Create an "instrumented" prolog.                  */
2027 /*                                                                  */
2028 /*------------------------------------------------------------------*/
2029
2030 void*
2031 mono_arch_instrument_prolog (MonoCompile *cfg, void *func, void *p,
2032                              gboolean enable_arguments)
2033 {
2034         guchar  *code = p;
2035         int     parmOffset,
2036                 fpOffset,
2037                 baseReg;
2038
2039         parmOffset = cfg->stack_usage - S390_TRACE_STACK_SIZE;
2040         if (cfg->method->save_lmf)
2041                 parmOffset -= sizeof(MonoLMF);
2042         fpOffset   = parmOffset + (5*sizeof(gpointer));
2043         if ((!has_ld) && (fpOffset > 4096)) {
2044                 s390_lgr (code, s390_r12, STK_BASE);
2045                 baseReg = s390_r12;
2046                 while (fpOffset > 4096) {
2047                         s390_aghi (code, baseReg, 4096);
2048                         fpOffset   -= 4096;
2049                         parmOffset -= 4096;
2050                 }
2051         } else {
2052                 baseReg = STK_BASE;
2053         }
2054
2055         s390_stmg (code, s390_r2, s390_r6, STK_BASE, parmOffset);
2056         if (has_ld) {
2057                 s390_stdy (code, s390_f0, 0, STK_BASE, fpOffset);
2058                 s390_stdy (code, s390_f2, 0, STK_BASE, fpOffset+sizeof(gdouble));
2059                 s390_stdy (code, s390_f4, 0, STK_BASE, fpOffset+2*sizeof(gdouble));
2060                 s390_stdy (code, s390_f6, 0, STK_BASE, fpOffset+3*sizeof(gdouble));
2061         } else {
2062                 s390_std  (code, s390_f0, 0, baseReg, fpOffset);
2063                 s390_std  (code, s390_f2, 0, baseReg, fpOffset+sizeof(gdouble));
2064                 s390_std  (code, s390_f4, 0, baseReg, fpOffset+2*sizeof(gdouble));
2065                 s390_std  (code, s390_f6, 0, baseReg, fpOffset+3*sizeof(gdouble));
2066         }
2067         s390_basr (code, s390_r13, 0);
2068         s390_j    (code, 10);
2069         s390_llong(code, cfg->method);
2070         s390_llong(code, func);
2071         s390_lg   (code, s390_r2, 0, s390_r13, 4);
2072         if (has_ld)
2073                 s390_lay  (code, s390_r3, 0, STK_BASE, parmOffset);
2074         else
2075                 s390_la   (code, s390_r3, 0, baseReg, parmOffset);
2076         s390_lgr  (code, s390_r4, STK_BASE);
2077         s390_aghi (code, s390_r4, cfg->stack_usage);
2078         s390_lg   (code, s390_r1, 0, s390_r13, 12);
2079         s390_basr (code, s390_r14, s390_r1);
2080         if (has_ld) {
2081                 s390_ldy  (code, s390_f6, 0, STK_BASE, fpOffset+3*sizeof(gdouble));
2082                 s390_ldy  (code, s390_f4, 0, STK_BASE, fpOffset+2*sizeof(gdouble));
2083                 s390_ldy  (code, s390_f2, 0, STK_BASE, fpOffset+sizeof(gdouble));
2084                 s390_ldy  (code, s390_f0, 0, STK_BASE, fpOffset);
2085         } else {
2086                 s390_ld   (code, s390_f6, 0, baseReg, fpOffset+3*sizeof(gdouble));
2087                 s390_ld   (code, s390_f4, 0, baseReg, fpOffset+2*sizeof(gdouble));
2088                 s390_ld   (code, s390_f2, 0, baseReg, fpOffset+sizeof(gdouble));
2089                 s390_ld   (code, s390_f0, 0, baseReg, fpOffset);
2090         }
2091         s390_lmg  (code, s390_r2, s390_r6, STK_BASE, parmOffset);
2092
2093         return code;
2094 }
2095
2096 /*========================= End of Function ========================*/
2097
2098 /*------------------------------------------------------------------*/
2099 /*                                                                  */
2100 /* Name         - mono_arch_instrument_epilog                       */
2101 /*                                                                  */
2102 /* Function     - Create an epilog that will handle the returned    */
2103 /*                values used in instrumentation.                   */
2104 /*                                                                  */
2105 /*------------------------------------------------------------------*/
2106
2107 void*
2108 mono_arch_instrument_epilog (MonoCompile *cfg, void *func, void *p, gboolean enable_arguments)
2109 {
2110         guchar     *code = p;
2111         int        save_mode = SAVE_NONE,
2112                    saveOffset;
2113         MonoMethod *method = cfg->method;
2114         int        rtype = mono_type_get_underlying_type (mono_method_signature (method)->ret)->type;
2115
2116         saveOffset = cfg->stack_usage - S390_TRACE_STACK_SIZE;
2117         if (method->save_lmf)
2118                 saveOffset -= sizeof(MonoLMF);
2119
2120 handle_enum:
2121         switch (rtype) {
2122         case MONO_TYPE_VOID:
2123                 /* special case string .ctor icall */
2124                 if (strcmp (".ctor", method->name) && method->klass == mono_defaults.string_class)
2125                         save_mode = SAVE_ONE;
2126                 else
2127                         save_mode = SAVE_NONE;
2128                 break;
2129         case MONO_TYPE_I8:
2130         case MONO_TYPE_U8:
2131                 save_mode = SAVE_ONE;
2132                 break;
2133         case MONO_TYPE_R4:
2134                 save_mode = SAVE_R4;
2135                 break;
2136         case MONO_TYPE_R8:
2137                 save_mode = SAVE_R8;
2138                 break;
2139         case MONO_TYPE_VALUETYPE:
2140                 if (mono_method_signature (method)->ret->data.klass->enumtype) {
2141                         rtype = mono_method_signature (method)->ret->data.klass->enum_basetype->type;
2142                         goto handle_enum;
2143                 }
2144                 save_mode = SAVE_STRUCT;
2145                 break;
2146         default:
2147                 save_mode = SAVE_ONE;
2148                 break;
2149         }
2150
2151         switch (save_mode) {
2152         case SAVE_ONE:
2153                 s390_stg (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2154                 if (enable_arguments) {
2155                         s390_lgr (code, s390_r3, s390_r2);
2156                 }
2157                 break;
2158         case SAVE_R4:
2159                 s390_std (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2160                 if (enable_arguments) {
2161                         s390_ldebr (code, s390_f0, s390_f0);
2162                 }
2163                 break;
2164         case SAVE_R8:
2165                 s390_std (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2166                 break;
2167         case SAVE_STRUCT:
2168                 s390_stg (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2169                 if (enable_arguments) {
2170                         s390_lg (code, s390_r3, 0, cfg->frame_reg,
2171                                  S390_MINIMAL_STACK_SIZE+cfg->param_area);
2172                 }
2173                 break;
2174         case SAVE_NONE:
2175         default:
2176                 break;
2177         }
2178
2179         s390_basr (code, s390_r13, 0);
2180         s390_j    (code, 10);
2181         s390_llong(code, cfg->method);
2182         s390_llong(code, func);
2183         s390_lg   (code, s390_r2, 0, s390_r13, 4);
2184         s390_lg   (code, s390_r1, 0, s390_r13, 12);
2185         s390_basr (code, s390_r14, s390_r1);
2186
2187         switch (save_mode) {
2188         case SAVE_ONE:
2189                 s390_lg  (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2190                 break;
2191         case SAVE_R4:
2192         case SAVE_R8:
2193                 s390_ld  (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2194                 break;
2195         case SAVE_STRUCT:
2196                 s390_lg  (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2197                 break;
2198         case SAVE_NONE:
2199         default:
2200                 break;
2201         }
2202
2203         return code;
2204 }
2205
2206 /*========================= End of Function ========================*/
2207
2208 /*------------------------------------------------------------------*/
2209 /*                                                                  */
2210 /* Name         - peephole_pass                                     */
2211 /*                                                                  */
2212 /* Function     - Form a peephole pass at the code looking for      */
2213 /*                simple optimizations.                             */
2214 /*                                                                  */
2215 /*------------------------------------------------------------------*/
2216
2217 static void
2218 peephole_pass (MonoCompile *cfg, MonoBasicBlock *bb)
2219 {
2220         MonoInst *ins, *n;
2221
2222         MONO_INST_LIST_FOR_EACH_ENTRY_SAFE (ins, n, &bb->ins_list, node) {
2223                 MonoInst *last_ins = mono_inst_list_prev (&ins->node, &bb->ins_list);
2224
2225                 switch (ins->opcode) {
2226                 case OP_MUL_IMM:
2227                         /* remove unnecessary multiplication with 1 */
2228                         if (ins->inst_imm == 1) {
2229                                 if (ins->dreg != ins->sreg1) {
2230                                         ins->opcode = OP_MOVE;
2231                                 } else {
2232                                         MONO_DEL_INS (ins);
2233                                         continue;
2234                                 }
2235                         }
2236                         break;
2237                 case OP_LOAD_MEMBASE:
2238                 case OP_LOADI4_MEMBASE:
2239                         /*
2240                          * OP_STORE_MEMBASE_REG reg, offset(basereg)
2241                          * OP_LOAD_MEMBASE offset(basereg), reg
2242                          */
2243                         if (last_ins && (last_ins->opcode == OP_STOREI4_MEMBASE_REG
2244                                          || last_ins->opcode == OP_STORE_MEMBASE_REG) &&
2245                             ins->inst_basereg == last_ins->inst_destbasereg &&
2246                             ins->inst_offset == last_ins->inst_offset) {
2247                                 if (ins->dreg == last_ins->sreg1) {
2248                                         MONO_DEL_INS (ins);
2249                                         continue;
2250                                 } else {
2251                                         ins->opcode = OP_MOVE;
2252                                         ins->sreg1 = last_ins->sreg1;
2253                                 }
2254
2255                         /*
2256                          * Note: reg1 must be different from the basereg in the second load
2257                          * OP_LOAD_MEMBASE offset(basereg), reg1
2258                          * OP_LOAD_MEMBASE offset(basereg), reg2
2259                          * -->
2260                          * OP_LOAD_MEMBASE offset(basereg), reg1
2261                          * OP_MOVE reg1, reg2
2262                          */
2263                         } if (last_ins && (last_ins->opcode == OP_LOADI4_MEMBASE
2264                                            || last_ins->opcode == OP_LOAD_MEMBASE) &&
2265                               ins->inst_basereg != last_ins->dreg &&
2266                               ins->inst_basereg == last_ins->inst_basereg &&
2267                               ins->inst_offset == last_ins->inst_offset) {
2268
2269                                 if (ins->dreg == last_ins->dreg) {
2270                                         MONO_DEL_INS (ins);
2271                                         continue;
2272                                 } else {
2273                                         ins->opcode = OP_MOVE;
2274                                         ins->sreg1 = last_ins->dreg;
2275                                 }
2276
2277                         }
2278                         break;
2279                 case OP_LOADU1_MEMBASE:
2280                 case OP_LOADI1_MEMBASE:
2281                         if (last_ins && (last_ins->opcode == OP_STOREI1_MEMBASE_REG) &&
2282                                         ins->inst_basereg == last_ins->inst_destbasereg &&
2283                                         ins->inst_offset == last_ins->inst_offset) {
2284                                 ins->opcode = (ins->opcode == OP_LOADI1_MEMBASE) ? CEE_CONV_I1 : CEE_CONV_U1;
2285                                 ins->sreg1 = last_ins->sreg1;
2286                         }
2287                         break;
2288                 case OP_LOADU2_MEMBASE:
2289                 case OP_LOADI2_MEMBASE:
2290                         if (last_ins && (last_ins->opcode == OP_STOREI2_MEMBASE_REG) &&
2291                                         ins->inst_basereg == last_ins->inst_destbasereg &&
2292                                         ins->inst_offset == last_ins->inst_offset) {
2293                                 ins->opcode = (ins->opcode == OP_LOADI2_MEMBASE) ? CEE_CONV_I2 : CEE_CONV_U2;
2294                                 ins->sreg1 = last_ins->sreg1;
2295                         }
2296                         break;
2297                 case CEE_CONV_I4:
2298                 case CEE_CONV_U4:
2299                 case OP_MOVE:
2300                         /*
2301                          * OP_MOVE reg, reg
2302                          */
2303                         if (ins->dreg == ins->sreg1) {
2304                                 MONO_DEL_INS (ins);
2305                                 continue;
2306                         }
2307                         /*
2308                          * OP_MOVE sreg, dreg
2309                          * OP_MOVE dreg, sreg
2310                          */
2311                         if (last_ins && last_ins->opcode == OP_MOVE &&
2312                             ins->sreg1 == last_ins->dreg &&
2313                             ins->dreg == last_ins->sreg1) {
2314                                 MONO_DEL_INS (ins);
2315                                 continue;
2316                         }
2317                         break;
2318                 }
2319         }
2320 }
2321
2322 /*========================= End of Function ========================*/
2323
2324 /*------------------------------------------------------------------*/
2325 /*                                                                  */
2326 /* Name         - mono_arch_local_regalloc.                         */
2327 /*                                                                  */
2328 /* Function     - We first scan the list of instructions and we     */
2329 /*                save the liveness information of each register    */
2330 /*                (when the register is first used, when its value  */
2331 /*                is set etc.). We also reverse the list of instr-  */
2332 /*                uctions (in the InstList list) because assigning  */
2333 /*                registers backwards allows for more tricks to be  */
2334 /*                used.                                             */
2335 /*                                                                  */
2336 /*------------------------------------------------------------------*/
2337
2338 void
2339 mono_arch_local_regalloc (MonoCompile *cfg, MonoBasicBlock *bb)
2340 {
2341         mono_local_regalloc(cfg, bb);
2342 }
2343
2344 /*========================= End of Function ========================*/
2345
2346 /*------------------------------------------------------------------*/
2347 /*                                                                  */
2348 /* Name         - emit_float_to_int                                 */
2349 /*                                                                  */
2350 /* Function     - Create instructions which will convert a floating */
2351 /*                point value to integer.                           */
2352 /*                                                                  */
2353 /*------------------------------------------------------------------*/
2354
2355 static guchar*
2356 emit_float_to_int (MonoCompile *cfg, guchar *code, int dreg, int sreg, int size, gboolean is_signed)
2357 {
2358         /* sreg is a float, dreg is an integer reg. */
2359         if (is_signed) {
2360                 s390_cfdbr (code, dreg, 5, sreg);
2361                 switch (size) {
2362                         case 1:
2363                                 s390_lghi (code, s390_r0, 0);
2364                                 s390_lghi (code, s390_r13, 0xff);
2365                                 s390_ltgr (code, dreg, dreg);
2366                                 s390_jnl  (code, 4);
2367                                 s390_lghi (code, s390_r0, 0x80);
2368                                 s390_ngr  (code, dreg, s390_r13);
2369                                 s390_ogr  (code, dreg, s390_r0);
2370                                 break;
2371                 }
2372         } else {
2373                 short *o[1];
2374                 s390_basr   (code, s390_r13, 0);
2375                 s390_j      (code, 10);
2376                 s390_llong  (code, 0x41e0000000000000);
2377                 s390_llong  (code, 0x41f0000000000000);
2378                 s390_ldr    (code, s390_f15, sreg);
2379                 s390_cdb    (code, s390_f15, 0, s390_r13, 4);
2380                 s390_jl     (code, 0); CODEPTR (code, o[0]);
2381                 s390_sdb    (code, s390_f15, 0, s390_r13, 12);
2382                 s390_cfdbr  (code, dreg, 7, s390_f15);
2383                 s390_j      (code, 4);
2384                 PTRSLOT (code, o[0]);
2385                 s390_cfdbr  (code, dreg, 5, sreg);
2386                 switch (size) {
2387                         case 1:
2388                                 s390_lghi (code, s390_r0, 0xff);
2389                                 s390_ngr  (code, dreg, s390_r0);
2390                                 break;
2391                         case 2:
2392                                 s390_lghi (code, s390_r0, -1);
2393                                 s390_srlg (code, s390_r0, s390_r0, 0, 16);
2394                                 s390_ngr  (code, dreg, s390_r0);
2395                                 break;
2396                 }
2397         }
2398         return code;
2399 }
2400
2401 /*========================= End of Function ========================*/
2402
2403 /*------------------------------------------------------------------*/
2404 /*                                                                  */
2405 /* Name         - mono_arch_output_basic_block                      */
2406 /*                                                                  */
2407 /* Function     - Perform the "real" work of emitting instructions  */
2408 /*                that will do the work of in the basic block.      */
2409 /*                                                                  */
2410 /*------------------------------------------------------------------*/
2411
2412 void
2413 mono_arch_output_basic_block (MonoCompile *cfg, MonoBasicBlock *bb)
2414 {
2415         MonoInst *ins, *next;
2416         MonoCallInst *call;
2417         guint offset;
2418         guint8 *code = cfg->native_code + cfg->code_len;
2419         guint last_offset = 0;
2420         int max_len, cpos, src2;
2421
2422         if (cfg->opt & MONO_OPT_PEEPHOLE)
2423                 peephole_pass (cfg, bb);
2424
2425         /* we don't align basic blocks of loops on s390 */
2426
2427         if (cfg->verbose_level > 2)
2428                 g_print ("Basic block %d starting at offset 0x%x\n", bb->block_num, bb->native_offset);
2429
2430         cpos = bb->max_offset;
2431
2432         if (cfg->prof_options & MONO_PROFILE_COVERAGE) {
2433                 //MonoCoverageInfo *cov = mono_get_coverage_info (cfg->method);
2434                 //g_assert (!mono_compile_aot);
2435                 //cpos += 6;
2436                 //if (bb->cil_code)
2437                 //      cov->data [bb->dfn].iloffset = bb->cil_code - cfg->cil_code;
2438                 /* this is not thread save, but good enough */
2439                 /* fixme: howto handle overflows? */
2440                 //x86_inc_mem (code, &cov->data [bb->dfn].count);
2441         }
2442
2443         MONO_BB_FOR_EACH_INS (bb, ins) {
2444                 offset = code - cfg->native_code;
2445
2446                 max_len = ((guint8 *)ins_get_spec (ins->opcode))[MONO_INST_LEN];
2447
2448                 if (offset > (cfg->code_size - max_len - 16)) {
2449                         cfg->code_size *= 2;
2450                         cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
2451                         code = cfg->native_code + offset;
2452                 }
2453
2454                 mono_debug_record_line_number (cfg, ins, offset);
2455
2456                 switch (ins->opcode) {
2457                 case OP_STOREI1_MEMBASE_IMM: {
2458                         s390_lghi (code, s390_r0, ins->inst_imm);
2459                         S390_LONG (code, stcy, stc, s390_r0, 0,
2460                                    ins->inst_destbasereg, ins->inst_offset);
2461                 }
2462                         break;
2463                 case OP_STOREI2_MEMBASE_IMM: {
2464                         s390_lghi (code, s390_r0, ins->inst_imm);
2465                         S390_LONG (code, sthy, sth, s390_r0, 0,
2466                                    ins->inst_destbasereg, ins->inst_offset);
2467                 }
2468                         break;
2469                 case OP_STOREI4_MEMBASE_IMM: {
2470                         if (s390_is_imm16(ins->inst_imm)) {
2471                                 s390_lghi (code, s390_r0, ins->inst_imm);
2472                         } else {
2473                                 s390_basr (code, s390_r13, 0);
2474                                 s390_j    (code, 6);
2475                                 s390_llong(code, ins->inst_imm);
2476                                 s390_lg   (code, s390_r0, 0, s390_r13, 4);
2477                         }
2478                         S390_LONG (code, sty, st, s390_r0, 0,
2479                                    ins->inst_destbasereg, ins->inst_offset);
2480                 }
2481                         break;
2482                 case OP_STORE_MEMBASE_IMM:
2483                 case OP_STOREI8_MEMBASE_IMM: {
2484                         if (s390_is_imm16(ins->inst_imm)) {
2485                                 s390_lghi (code, s390_r0, ins->inst_imm);
2486                         } else {
2487                                 s390_basr (code, s390_r13, 0);
2488                                 s390_j    (code, 6);
2489                                 s390_llong(code, ins->inst_imm);
2490                                 s390_lg   (code, s390_r0, 0, s390_r13, 4);
2491                         }
2492                         S390_LONG (code, stg, stg, s390_r0, 0,
2493                                    ins->inst_destbasereg, ins->inst_offset);
2494                 }
2495                         break;
2496                 case OP_STOREI1_MEMBASE_REG: {
2497                         S390_LONG (code, stcy, stc, ins->sreg1, 0,
2498                                    ins->inst_destbasereg, ins->inst_offset);
2499                 }
2500                         break;
2501                 case OP_STOREI2_MEMBASE_REG: {
2502                         S390_LONG (code, sthy, sth, ins->sreg1, 0,
2503                                    ins->inst_destbasereg, ins->inst_offset);
2504                 }
2505                         break;
2506                 case OP_STOREI4_MEMBASE_REG: {
2507                         S390_LONG (code, sty, st, ins->sreg1, 0,
2508                                    ins->inst_destbasereg, ins->inst_offset);
2509                 }
2510                         break;
2511                 case OP_STORE_MEMBASE_REG:
2512                 case OP_STOREI8_MEMBASE_REG: {
2513                         S390_LONG (code, stg, stg, ins->sreg1, 0,
2514                                    ins->inst_destbasereg, ins->inst_offset);
2515                 }
2516                         break;
2517                 case CEE_LDIND_I:
2518                 case CEE_LDIND_I4: {
2519                         s390_basr (code, s390_r13, 0);
2520                         s390_j    (code, 6);
2521                         s390_llong(code, ins->inst_p0);
2522                         s390_lg   (code, s390_r13, 0, s390_r13, 4);
2523                         s390_lgf  (code, ins->dreg, 0, s390_r13, 0);
2524                 }
2525                         break;
2526                 case CEE_LDIND_U4: {
2527                         s390_basr (code, s390_r13, 0);
2528                         s390_j    (code, 6);
2529                         s390_llong(code, ins->inst_p0);
2530                         s390_lg   (code, s390_r13, 0, s390_r13, 4);
2531                         s390_llgf (code, ins->dreg, 0, s390_r13, 0);
2532                 }
2533                         break;
2534                 case OP_LOADU4_MEM:
2535                         g_assert_not_reached ();
2536                         break;
2537                 case OP_LOAD_MEMBASE:
2538                 case OP_LOADI8_MEMBASE: {
2539                         S390_LONG (code, lg, lg, ins->dreg, 0,
2540                                    ins->inst_basereg, ins->inst_offset);
2541                 }
2542                         break;
2543                 case OP_LOADI4_MEMBASE: {
2544                         S390_LONG (code, lgf, lgf, ins->dreg, 0,
2545                                    ins->inst_basereg, ins->inst_offset);
2546                 }
2547                         break;
2548                 case OP_LOADU4_MEMBASE: {
2549                         S390_LONG (code, llgf, llgf, ins->dreg, 0,
2550                                    ins->inst_basereg, ins->inst_offset);
2551                 }
2552                         break;
2553                 case OP_LOADU1_MEMBASE: {
2554                         S390_LONG (code, llgc, llgc, ins->dreg, 0,
2555                                    ins->inst_basereg, ins->inst_offset);
2556                 }
2557                         break;
2558                 case OP_LOADI1_MEMBASE: {
2559                         S390_LONG (code, lgb, lgb, ins->dreg, 0,
2560                                    ins->inst_basereg, ins->inst_offset);
2561                 }
2562                         break;
2563                 case OP_LOADU2_MEMBASE: {
2564                         S390_LONG (code, llgh, llgh, ins->dreg, 0,
2565                                    ins->inst_basereg, ins->inst_offset);
2566                 }
2567                         break;
2568                 case OP_LOADI2_MEMBASE: {
2569                         S390_LONG (code, lgh, lgh, ins->dreg, 0,
2570                                    ins->inst_basereg, ins->inst_offset);
2571                 }
2572                         break;
2573                 case CEE_CONV_I1: {
2574                         s390_lghi  (code, s390_r0, 0x80);
2575                         if (ins->dreg != ins->sreg1) {
2576                                 s390_lgr  (code, ins->dreg, ins->sreg1);
2577                         }
2578                         s390_ngr  (code, s390_r0, ins->sreg1);
2579                         s390_jz   (code, 9);
2580                         s390_lghi (code, s390_r13, -1);
2581                         s390_sllg (code, s390_r13, s390_r13, 0, 8);
2582                         s390_ogr  (code, ins->dreg, s390_r13);
2583                 }
2584                         break;
2585                 case CEE_CONV_I2: {
2586                         s390_lghi (code, s390_r0, 0x80);
2587                         s390_sllg (code, s390_r0, s390_r0, 0, 8);
2588                         if (ins->dreg != ins->sreg1) {
2589                                 s390_lgr  (code, ins->dreg, ins->sreg1);
2590                         }
2591                         s390_ngr  (code, s390_r0, ins->sreg1);
2592                         s390_jz   (code, 9);
2593                         s390_lghi (code, s390_r13, -1);
2594                         s390_sllg (code, s390_r13, s390_r13, 0, 16);
2595                         s390_ogr  (code, ins->dreg, s390_r13);
2596                 }
2597                         break;
2598                 case CEE_CONV_U1: {
2599                         s390_lghi (code, s390_r0, 0xff);
2600                         if (ins->dreg != ins->sreg1) {
2601                                 s390_lgr  (code, ins->dreg, ins->sreg1);
2602                         }
2603                         s390_ngr  (code, ins->dreg, s390_r0);
2604                 }
2605                         break;
2606                 case CEE_CONV_U2: {
2607                         s390_lghi (code, s390_r0, -1);
2608                         s390_sllg (code, s390_r0, s390_r0, 0, 16);
2609                         s390_srlg (code, s390_r0, s390_r0, 0, 16);
2610                         if (ins->dreg != ins->sreg1) {
2611                                 s390_lgr  (code, ins->dreg, ins->sreg1);
2612                         }
2613                         s390_ngr  (code, ins->dreg, s390_r0);
2614                 }
2615                         break;
2616                 case OP_COMPARE:
2617                 case OP_LCOMPARE: {
2618                         next = mono_inst_list_next (&ins->node, &bb->ins_list);
2619                         if ((next) && (opcode_to_cond(next->opcode) >= CMP_LE_UN))
2620                                 s390_clgr (code, ins->sreg1, ins->sreg2);
2621                         else
2622                                 s390_cgr  (code, ins->sreg1, ins->sreg2);
2623                 }
2624                         break;
2625                 case OP_COMPARE_IMM: {
2626                         next = mono_inst_list_next (&ins->node, &bb->ins_list);
2627                         if (s390_is_imm16 (ins->inst_imm)) {
2628                                 s390_lghi (code, s390_r0, ins->inst_imm);
2629                                 if ((next) &&
2630                                     (opcode_to_cond(next->opcode) >= CMP_LE_UN))
2631                                         s390_clgr (code, ins->sreg1, s390_r0);
2632                                 else
2633                                         s390_cgr  (code, ins->sreg1, s390_r0);
2634                         } else {
2635                                 s390_basr (code, s390_r13, 0);
2636                                 s390_j    (code, 6);
2637                                 s390_llong(code, ins->inst_imm);
2638                                 if ((next) &&
2639                                     (opcode_to_cond(next->opcode) >= CMP_LE_UN))
2640                                         s390_clg  (code, ins->sreg1, 0, s390_r13, 4);
2641                                 else
2642                                         s390_cg   (code, ins->sreg1, 0, s390_r13, 4);
2643                         }
2644                 }
2645                         break;
2646                 case OP_ICOMPARE: {
2647                         next = mono_inst_list_next (&ins->node, &bb->ins_list);
2648                         if ((next) && (opcode_to_cond(next->opcode) >= CMP_LE_UN))
2649                                 s390_clr  (code, ins->sreg1, ins->sreg2);
2650                         else
2651                                 s390_cr   (code, ins->sreg1, ins->sreg2);
2652                 }
2653                         break;
2654                 case OP_ICOMPARE_IMM: {
2655                         next = mono_inst_list_next (&ins->node, &bb->ins_list);
2656                         if (s390_is_imm16 (ins->inst_imm)) {
2657                                 s390_lghi (code, s390_r0, ins->inst_imm);
2658                                 if ((next) &&
2659                                     (opcode_to_cond(next->opcode) >= CMP_LE_UN))
2660                                         s390_clr  (code, ins->sreg1, s390_r0);
2661                                 else
2662                                         s390_cr   (code, ins->sreg1, s390_r0);
2663                         }
2664                         else {
2665                                 s390_basr (code, s390_r13, 0);
2666                                 s390_j    (code, 4);
2667                                 s390_word (code, ins->inst_imm);
2668                                 if ((next) &&
2669                                     (opcode_to_cond(next->opcode) >= CMP_LE_UN))
2670                                         s390_cl  (code, ins->sreg1, 0, s390_r13, 4);
2671                                 else
2672                                         s390_c   (code, ins->sreg1, 0, s390_r13, 4);
2673                         }
2674                 }
2675                         break;
2676                 case OP_BREAK: {
2677                         s390_basr  (code, s390_r13, 0);
2678                         s390_j     (code, 6);
2679                         mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS,
2680                                              mono_break);
2681                         s390_llong (code, mono_break);
2682                         s390_lg    (code, s390_r14, 0, s390_r13, 4);
2683                         s390_basr  (code, s390_r14, s390_r14);
2684                 }
2685                         break;
2686                 case OP_ADDCC: {
2687                         CHECK_SRCDST_COM;
2688                         s390_algr  (code, ins->dreg, src2);
2689                 }
2690                         break;
2691                 case CEE_ADD: {
2692                         CHECK_SRCDST_COM;
2693                         s390_agr   (code, ins->dreg, src2);
2694                 }
2695                         break;
2696                 case OP_ADC: {
2697                         CHECK_SRCDST_COM;
2698                         s390_alcgr (code, ins->dreg, src2);
2699                 }
2700                         break;
2701                 case OP_ADD_IMM: {
2702                         if (ins->dreg != ins->sreg1) {
2703                                 s390_lgr  (code, ins->dreg, ins->sreg1);
2704                         }
2705                         if (s390_is_imm16 (ins->inst_imm)) {
2706                                 s390_aghi (code, ins->dreg, ins->inst_imm);
2707                         } else {
2708                                 s390_basr (code, s390_r13, 0);
2709                                 s390_j    (code, 6);
2710                                 s390_llong(code, ins->inst_imm);
2711                                 s390_ag   (code, ins->dreg, 0, s390_r13, 4);
2712                         }
2713                 }
2714                         break;
2715                 case OP_ADC_IMM: {
2716                         if (ins->dreg != ins->sreg1) {
2717                                 s390_lgr  (code, ins->dreg, ins->sreg1);
2718                         }
2719                         if (s390_is_imm16 (ins->inst_imm)) {
2720                                 s390_lghi  (code, s390_r0, ins->inst_imm);
2721                                 s390_alcgr (code, ins->dreg, s390_r0);
2722                         } else {
2723                                 s390_basr  (code, s390_r13, 0);
2724                                 s390_j     (code, 6);
2725                                 s390_llong (code, ins->inst_imm);
2726                                 s390_lg    (code, s390_r13, 0, s390_r13, 4);
2727                                 s390_alcgr (code, ins->dreg, s390_r13);
2728                         }
2729                 }
2730                         break;
2731                 case OP_LADD_OVF: {
2732                         CHECK_SRCDST_COM;
2733                         s390_agr   (code, ins->dreg, src2);
2734                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2735                 }
2736                         break;
2737                 case OP_LADD_OVF_UN: {
2738                         CHECK_SRCDST_COM;
2739                         s390_algr  (code, ins->dreg, src2);
2740                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
2741                 }
2742                         break;
2743                 case OP_ADD_OVF_CARRY: {
2744                         CHECK_SRCDST_COM;
2745                         s390_lghi  (code, s390_r0, 0);
2746                         s390_lgr   (code, s390_r1, s390_r0);
2747                         s390_alcgr (code, s390_r0, s390_r1);
2748                         s390_agr   (code, ins->dreg, src2);
2749                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2750                         s390_agr   (code, ins->dreg, s390_r0);
2751                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2752                 }
2753                         break;
2754                 case OP_ADD_OVF_UN_CARRY: {
2755                         CHECK_SRCDST_COM;
2756                         s390_alcgr (code, ins->dreg, src2);
2757                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
2758                 }
2759                         break;
2760                 case OP_SUBCC: {
2761                         CHECK_SRCDST_NCOM;
2762                         s390_slgr (code, ins->dreg, src2);
2763                 }
2764                         break;
2765                 case CEE_SUB: {
2766                         CHECK_SRCDST_NCOM;
2767                         s390_sgr  (code, ins->dreg, src2);
2768                 }
2769                         break;
2770                 case OP_SBB: {
2771                         CHECK_SRCDST_NCOM;
2772                         s390_slbgr(code, ins->dreg, src2);
2773                 }
2774                         break;
2775                 case OP_SUB_IMM: {
2776                         if (ins->dreg != ins->sreg1) {
2777                                 s390_lgr   (code, ins->dreg, ins->sreg1);
2778                         }
2779                         if (s390_is_imm16 (-ins->inst_imm)) {
2780                                 s390_lghi  (code, s390_r0, ins->inst_imm);
2781                                 s390_slgr  (code, ins->dreg, s390_r0);
2782                         } else {
2783                                 s390_basr (code, s390_r13, 0);
2784                                 s390_j    (code, 6);
2785                                 s390_llong(code, ins->inst_imm);
2786                                 s390_slg  (code, ins->dreg, 0, s390_r13, 4);
2787                         }
2788                 }
2789                         break;
2790                 case OP_SBB_IMM: {
2791                         if (ins->dreg != ins->sreg1) {
2792                                 s390_lgr   (code, ins->dreg, ins->sreg1);
2793                         }
2794                         if (s390_is_imm16 (-ins->inst_imm)) {
2795                                 s390_lghi  (code, s390_r0, ins->inst_imm);
2796                                 s390_slbgr (code, ins->dreg, s390_r0);
2797                         } else {
2798                                 s390_basr (code, s390_r13, 0);
2799                                 s390_j    (code, 6);
2800                                 s390_llong(code, ins->inst_imm);
2801                                 s390_slbg (code, ins->dreg, 0, s390_r13, 4);
2802                         }
2803                 }
2804                         break;
2805                 case OP_LSUB_OVF: {
2806                         CHECK_SRCDST_NCOM;
2807                         s390_sgr  (code, ins->dreg, src2);
2808                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2809                 }
2810                         break;
2811                 case OP_LSUB_OVF_UN: {
2812                         CHECK_SRCDST_NCOM;
2813                         s390_slgr (code, ins->dreg, src2);
2814                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
2815                 }
2816                         break;
2817                 case OP_SUB_OVF_CARRY: {
2818                         CHECK_SRCDST_NCOM;
2819                         s390_lghi  (code, s390_r0, 0);
2820                         s390_lgr   (code, s390_r1, s390_r0);
2821                         s390_slbgr (code, s390_r0, s390_r1);
2822                         s390_sgr   (code, ins->dreg, src2);
2823                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2824                         s390_agr   (code, ins->dreg, s390_r0);
2825                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2826                 }
2827                         break;
2828                 case OP_SUB_OVF_UN_CARRY: {
2829                         CHECK_SRCDST_NCOM;
2830                         s390_slbgr (code, ins->dreg, src2);
2831                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
2832                 }
2833                         break;
2834                 case CEE_AND: {
2835                         if (ins->sreg1 == ins->dreg) {
2836                                 s390_ngr  (code, ins->dreg, ins->sreg2);
2837                         }
2838                         else {
2839                                 if (ins->sreg2 == ins->dreg) {
2840                                         s390_ngr (code, ins->dreg, ins->sreg1);
2841                                 }
2842                                 else {
2843                                         s390_lgr (code, ins->dreg, ins->sreg1);
2844                                         s390_ngr (code, ins->dreg, ins->sreg2);
2845                                 }
2846                         }
2847                 }
2848                         break;
2849                 case OP_AND_IMM: {
2850                         if (ins->dreg != ins->sreg1) {
2851                                 s390_lgr  (code, ins->dreg, ins->sreg1);
2852                         }
2853                         if (s390_is_imm16 (ins->inst_imm)) {
2854                                 s390_lghi  (code, s390_r0, ins->inst_imm);
2855                                 s390_ngr  (code, ins->dreg, s390_r0);
2856                         } else {
2857                                 s390_basr (code, s390_r13, 0);
2858                                 s390_j    (code, 6);
2859                                 s390_llong(code, ins->inst_imm);
2860                                 s390_ng   (code, ins->dreg, 0, s390_r13, 4);
2861                         }
2862                 }
2863                         break;
2864                 case OP_LDIV: {
2865                         s390_lgr  (code, s390_r1, ins->sreg1);
2866                         s390_dsgr (code, s390_r0, ins->sreg2);
2867                         s390_lgr  (code, ins->dreg, s390_r1);
2868                 }
2869                         break;
2870                 case OP_LDIV_UN: {
2871                         s390_lgr   (code, s390_r1, ins->sreg1);
2872                         s390_lghi  (code, s390_r0, 0);
2873                         s390_dlgr  (code, s390_r0, ins->sreg2);
2874                         s390_lgr   (code, ins->dreg, s390_r1);
2875                 }
2876                         break;
2877                 case OP_DIV_IMM: {
2878                         if (s390_is_imm16 (ins->inst_imm)) {
2879                                 s390_lghi (code, s390_r13, ins->inst_imm);
2880                                 s390_lgr  (code, s390_r1, ins->sreg1);
2881                         } else {
2882                                 s390_basr (code, s390_r13, 0);
2883                                 s390_j    (code, 6);
2884                                 s390_llong(code, ins->inst_imm);
2885                                 s390_lgr  (code, s390_r1, ins->sreg1);
2886                                 s390_lg   (code, s390_r13, 0, s390_r13, 4);
2887                         }
2888                         s390_dsgr (code, s390_r0, s390_r13);
2889                         s390_lgr  (code, ins->dreg, s390_r1);
2890                 }
2891                         break;
2892                 case OP_LREM: {
2893                         s390_lgr  (code, s390_r1, ins->sreg1);
2894                         s390_dsgr (code, s390_r0, ins->sreg2);
2895                         s390_lgr  (code, ins->dreg, s390_r0);
2896                         break;
2897                 }
2898                 case OP_LREM_UN: {
2899                         s390_lgr   (code, s390_r1, ins->sreg1);
2900                         s390_lghi  (code, s390_r0, 0);
2901                         s390_dlgr  (code, s390_r0, ins->sreg2);
2902                         s390_lgr   (code, ins->dreg, s390_r0);
2903                 }
2904                         break;
2905                 case OP_REM_IMM: {
2906                         if (s390_is_imm16 (ins->inst_imm)) {
2907                                 s390_lghi  (code, s390_r13, ins->inst_imm);
2908                                 s390_lgr   (code, s390_r0, ins->sreg1);
2909                         } else {
2910                                 s390_basr (code, s390_r13, 0);
2911                                 s390_j    (code, 6);
2912                                 s390_llong(code, ins->inst_imm);
2913                                 s390_lgr  (code, s390_r0, ins->sreg1);
2914                                 s390_lg   (code, s390_r13, 0, s390_r13, 4);
2915                         }
2916                         s390_dsgr(code, s390_r0, s390_r13);
2917                         s390_lgr (code, ins->dreg, s390_r0);
2918                 }
2919                         break;
2920                 case CEE_OR: {
2921                         if (ins->sreg1 == ins->dreg) {
2922                                 s390_ogr  (code, ins->dreg, ins->sreg2);
2923                         }
2924                         else {
2925                                 if (ins->sreg2 == ins->dreg) {
2926                                         s390_ogr (code, ins->dreg, ins->sreg1);
2927                                 }
2928                                 else {
2929                                         s390_lgr (code, ins->dreg, ins->sreg1);
2930                                         s390_ogr (code, ins->dreg, ins->sreg2);
2931                                 }
2932                         }
2933                 }
2934                         break;
2935                 case OP_OR_IMM: {
2936                         if (ins->dreg != ins->sreg1) {
2937                                 s390_lgr  (code, ins->dreg, ins->sreg1);
2938                         }
2939                         if (s390_is_imm16 (ins->inst_imm)) {
2940                                 s390_lghi (code, s390_r0, ins->inst_imm);
2941                                 s390_ogr  (code, ins->dreg, s390_r0);
2942                         } else {
2943                                 s390_basr (code, s390_r13, 0);
2944                                 s390_j    (code, 6);
2945                                 s390_llong(code, ins->inst_imm);
2946                                 s390_og   (code, ins->dreg, 0, s390_r13, 4);
2947                         }
2948                 }
2949                         break;
2950                 case CEE_XOR: {
2951                         if (ins->sreg1 == ins->dreg) {
2952                                 s390_xgr  (code, ins->dreg, ins->sreg2);
2953                         }
2954                         else {
2955                                 if (ins->sreg2 == ins->dreg) {
2956                                         s390_xgr (code, ins->dreg, ins->sreg1);
2957                                 }
2958                                 else {
2959                                         s390_lgr (code, ins->dreg, ins->sreg1);
2960                                         s390_xgr (code, ins->dreg, ins->sreg2);
2961                                 }
2962                         }
2963                 }
2964                         break;
2965                 case OP_XOR_IMM: {
2966                         if (ins->dreg != ins->sreg1) {
2967                                 s390_lgr  (code, ins->dreg, ins->sreg1);
2968                         }
2969                         if (s390_is_imm16 (ins->inst_imm)) {
2970                                 s390_lghi  (code, s390_r0, ins->inst_imm);
2971                                 s390_xgr  (code, ins->dreg, s390_r0);
2972                         } else {
2973                                 s390_basr (code, s390_r13, 0);
2974                                 s390_j    (code, 6);
2975                                 s390_llong(code, ins->inst_imm);
2976                                 s390_xg   (code, ins->dreg, 0, s390_r13, 4);
2977                         }
2978                 }
2979                         break;
2980                 case CEE_SHL:
2981                 case OP_LSHL: {
2982                         CHECK_SRCDST_NCOM;
2983                         s390_sllg (code, ins->dreg, ins->dreg, src2, 0);
2984                 }
2985                         break;
2986                 case OP_SHL_IMM:
2987                 case OP_LSHL_IMM: {
2988                         if (ins->sreg1 != ins->dreg) {
2989                                 s390_lgr   (code, ins->dreg, ins->sreg1);
2990                         }
2991                         s390_sllg (code, ins->dreg, ins->dreg, 0, (ins->inst_imm & 0x3f));
2992                 }
2993                         break;
2994                 case CEE_SHR:
2995                 case OP_LSHR: {
2996                         CHECK_SRCDST_NCOM;
2997                         s390_srag  (code, ins->dreg, ins->dreg, src2, 0);
2998                 }
2999                         break;
3000                 case OP_SHR_IMM:
3001                 case OP_LSHR_IMM: {
3002                         if (ins->sreg1 != ins->dreg) {
3003                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3004                         }
3005                         s390_srag  (code, ins->dreg, ins->dreg, 0, (ins->inst_imm & 0x3f));
3006                 }
3007                         break;
3008                 case OP_SHR_UN_IMM:
3009                 case OP_LSHR_UN_IMM: {
3010                         if (ins->sreg1 != ins->dreg) {
3011                                 s390_lgr   (code, ins->dreg, ins->sreg1);
3012                         }
3013                         s390_srlg (code, ins->dreg, ins->dreg, 0, (ins->inst_imm & 0x3f));
3014                 }
3015                         break;
3016                 case CEE_SHR_UN:
3017                 case OP_LSHR_UN: {
3018                         CHECK_SRCDST_NCOM;
3019                         s390_srlg (code, ins->dreg, ins->dreg, src2, 0);
3020                 }
3021                         break;
3022                 case CEE_NOT: {
3023                         if (ins->sreg1 != ins->dreg) {
3024                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3025                         }
3026                         s390_lghi (code, s390_r0, -1);
3027                         s390_xgr  (code, ins->dreg, s390_r0);
3028                 }
3029                         break;
3030                 case CEE_NEG: {
3031                         s390_lcgr (code, ins->dreg, ins->sreg1);
3032                 }
3033                         break;
3034                 case CEE_MUL:
3035                 case OP_LMUL: {
3036                         CHECK_SRCDST_COM;
3037                         s390_msgr (code, ins->dreg, src2);
3038                 }
3039                         break;
3040                 case OP_MUL_IMM:
3041                 case OP_LMUL_IMM: {
3042                         if (ins->dreg != ins->sreg1) {
3043                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3044                         }
3045                         if (s390_is_imm16 (ins->inst_imm)) {
3046                                 s390_lghi (code, s390_r13, ins->inst_imm);
3047                         } else {
3048                                 s390_basr (code, s390_r13, 0);
3049                                 s390_j    (code, 6);
3050                                 s390_llong(code, ins->inst_imm);
3051                                 s390_lg   (code, s390_r13, 0, s390_r13, 4);
3052                         }
3053                         s390_msgr (code, ins->dreg, s390_r13);
3054                 }
3055                         break;
3056                 case OP_LMUL_OVF:
3057                 case CEE_MUL_OVF: {
3058                         short int *o[2];
3059                         s390_ltgr (code, s390_r1, ins->sreg1);
3060                         s390_jz   (code, 0); CODEPTR(code, o[0]);
3061                         s390_ltgr (code, s390_r0, ins->sreg2);
3062                         s390_jnz  (code, 6);
3063                         s390_lghi (code, s390_r1, 0);
3064                         s390_j    (code, 0); CODEPTR(code, o[1]);
3065                         s390_xgr  (code, s390_r0, s390_r1);
3066                         s390_msgr (code, s390_r1, ins->sreg2);
3067                         s390_xgr  (code, s390_r0, s390_r1);
3068                         s390_srlg (code, s390_r0, s390_r0, 0, 63);
3069                         s390_ltgr (code, s390_r0, s390_r0);
3070                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3071                         PTRSLOT   (code, o[0]);
3072                         PTRSLOT   (code, o[1]);
3073                         s390_lgr  (code, ins->dreg, s390_r1);
3074                 }
3075                         break;
3076                 case OP_LMUL_OVF_UN:
3077                 case CEE_MUL_OVF_UN: {
3078                         s390_lghi  (code, s390_r0, 0);
3079                         s390_lgr   (code, s390_r1, ins->sreg1);
3080                         s390_mlgr  (code, s390_r0, ins->sreg2);
3081                         s390_ltgr  (code, s390_r0, s390_r0);
3082                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3083                         s390_lgr   (code, ins->dreg, s390_r1);
3084                 }
3085                         break;
3086                 case OP_IADDCC: {
3087                         g_assert_not_reached ();
3088                         CHECK_SRCDST_COM_I;
3089                         s390_algr (code, ins->dreg, src2);
3090                 }
3091                         break;
3092                 case OP_IADD: {
3093                         CHECK_SRCDST_COM_I;
3094                         s390_agr  (code, ins->dreg, src2);
3095                 }
3096                         break;
3097                 case OP_IADC: {
3098                         g_assert_not_reached ();
3099                         CHECK_SRCDST_COM_I;
3100                         s390_alcgr (code, ins->dreg, src2);
3101                 }
3102                         break;
3103                 case OP_IADD_IMM: {
3104                         if (ins->dreg != ins->sreg1) {
3105                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3106                         }
3107                         if (s390_is_imm16 (ins->inst_imm)) {
3108                                 s390_aghi(code, ins->dreg, ins->inst_imm);
3109                         } else {
3110                                 s390_basr (code, s390_r13, 0);
3111                                 s390_j    (code, 4);
3112                                 s390_word (code, ins->inst_imm);
3113                                 s390_agf  (code, ins->dreg, 0, s390_r13, 4);
3114                         }
3115                 }
3116                         break;
3117                 case OP_IADC_IMM: {
3118                         if (ins->dreg != ins->sreg1) {
3119                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3120                         }
3121                         if (s390_is_imm16 (ins->inst_imm)) {
3122                                 s390_lghi  (code, s390_r0, ins->inst_imm);
3123                                 s390_alcgr (code, ins->dreg, s390_r0);
3124                         } else {
3125                                 s390_basr  (code, s390_r13, 0);
3126                                 s390_j     (code, 4);
3127                                 s390_word  (code, ins->inst_imm);
3128                                 s390_lgf   (code, s390_r13, 0, s390_r13, 4);
3129                                 s390_alcgr (code, ins->dreg, s390_r13);
3130                         }
3131                 }
3132                         break;
3133                 case CEE_ADD_OVF: {
3134                         CHECK_SRCDST_COM;
3135                         s390_ar    (code, ins->dreg, src2);
3136                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3137                         s390_lgfr  (code, ins->dreg, ins->dreg);
3138                 }
3139                         break;
3140                 case CEE_ADD_OVF_UN: {
3141                         CHECK_SRCDST_COM;
3142                         s390_algr  (code, ins->dreg, src2);
3143                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
3144                         s390_llgfr (code, ins->dreg, ins->dreg);
3145                 }
3146                         break;
3147                 case OP_ISUBCC: {
3148                         CHECK_SRCDST_NCOM_I;
3149                         s390_slgr (code, ins->dreg, src2);
3150                 }
3151                         break;
3152                 case OP_ISUB: {
3153                         CHECK_SRCDST_NCOM_I;
3154                         s390_sgr  (code, ins->dreg, src2);
3155                 }
3156                         break;
3157                 case OP_ISBB: {
3158                         CHECK_SRCDST_NCOM_I;
3159                         s390_slbgr (code, ins->dreg, src2);
3160                 }
3161                         break;
3162                 case OP_ISUB_IMM: {
3163                         if (ins->dreg != ins->sreg1) {
3164                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3165                         }
3166                         if (s390_is_imm16 (-ins->inst_imm)) {
3167                                 s390_aghi (code, ins->dreg, -ins->inst_imm);
3168                         } else {
3169                                 s390_basr (code, s390_r13, 0);
3170                                 s390_j    (code, 4);
3171                                 s390_word (code, ins->inst_imm);
3172                                 s390_sgf  (code, ins->dreg, 0, s390_r13, 4);
3173                         }
3174                 }
3175                         break;
3176                 case OP_ISBB_IMM: {
3177                         s390_basr (code, s390_r13, 0);
3178                         s390_j    (code, 4);
3179                         s390_word (code, ins->inst_imm);
3180                         s390_slgf (code, ins->dreg, 0, s390_r13, 4);
3181                 }
3182                         break;
3183                 case CEE_SUB_OVF: {
3184                         CHECK_SRCDST_NCOM;
3185                         s390_sr   (code, ins->dreg, src2);
3186                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3187                         s390_lgfr (code, ins->dreg, ins->dreg);
3188                 }
3189                         break;
3190                 case CEE_SUB_OVF_UN: {
3191                         CHECK_SRCDST_NCOM;
3192                         s390_slr  (code, ins->dreg, src2);
3193                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
3194                         s390_llgfr(code, ins->dreg, ins->dreg);
3195                 }
3196                         break;
3197                 case OP_IAND: {
3198                         CHECK_SRCDST_NCOM_I;
3199                         s390_ngr (code, ins->dreg, src2);
3200                 }
3201                         break;
3202                 case OP_IAND_IMM: {
3203                         if (ins->dreg != ins->sreg1) {
3204                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3205                         }
3206                         if (s390_is_imm16 (ins->inst_imm)) {
3207                                 s390_lghi (code, s390_r0, ins->inst_imm);
3208                                 s390_ngr  (code, ins->dreg, s390_r0);
3209                         } else {
3210                                 s390_basr (code, s390_r13, 0);
3211                                 s390_j    (code, 6);
3212                                 s390_llong(code, ins->inst_imm);
3213                                 s390_ng   (code, ins->dreg, 0, s390_r13, 4);
3214                         }
3215                 }
3216                         break;
3217                 case OP_IDIV: {
3218                         s390_lgfr (code, s390_r0, ins->sreg1);
3219                         s390_srda (code, s390_r0, 0, 32);
3220                         s390_dr   (code, s390_r0, ins->sreg2);
3221                         s390_lgfr (code, ins->dreg, s390_r1);
3222                 }
3223                         break;
3224                 case OP_IDIV_UN: {
3225                         s390_lgfr (code, s390_r0, ins->sreg1);
3226                         s390_srdl (code, s390_r0, 0, 32);
3227                         s390_dlr  (code, s390_r0, ins->sreg2);
3228                         s390_lgfr (code, ins->dreg, s390_r1);
3229                 }
3230                         break;
3231                 case OP_IDIV_IMM: {
3232                         if (s390_is_imm16 (ins->inst_imm)) {
3233                                 s390_lghi (code, s390_r13, ins->inst_imm);
3234                                 s390_lgfr (code, s390_r0, ins->sreg1);
3235                         } else {
3236                                 s390_basr (code, s390_r13, 0);
3237                                 s390_j    (code, 4);
3238                                 s390_word (code, ins->inst_imm);
3239                                 s390_lgfr (code, s390_r0, ins->sreg1);
3240                                 s390_lgf  (code, s390_r13, 0, s390_r13, 4);
3241                         }
3242                         s390_srda (code, s390_r0, 0, 32);
3243                         s390_dr   (code, s390_r0, ins->sreg2);
3244                         s390_lgfr (code, ins->dreg, s390_r1);
3245                 }
3246                         break;
3247                 case OP_IREM: {
3248                         s390_lgfr (code, s390_r0, ins->sreg1);
3249                         s390_srda (code, s390_r0, 0, 32);
3250                         s390_dr   (code, s390_r0, ins->sreg2);
3251                         s390_lgfr (code, ins->dreg, s390_r0);
3252                         break;
3253                 case OP_IREM_UN:
3254                         s390_lgfr (code, s390_r0, ins->sreg1);
3255                         s390_srdl (code, s390_r0, 0, 32);
3256                         s390_dlr  (code, s390_r0, ins->sreg2);
3257                         s390_lgfr (code, ins->dreg, s390_r0);
3258                 }
3259                         break;
3260                 case OP_IREM_IMM: {
3261                         if (s390_is_imm16 (ins->inst_imm)) {
3262                                 s390_lghi (code, s390_r13, ins->inst_imm);
3263                                 s390_lgfr (code, s390_r0, ins->sreg1);
3264                         } else {
3265                                 s390_basr (code, s390_r13, 0);
3266                                 s390_j    (code, 4);
3267                                 s390_word (code, ins->inst_imm);
3268                                 s390_lgfr (code, s390_r0, ins->sreg1);
3269                                 s390_lgf  (code, s390_r13, 0, s390_r13, 4);
3270                         }
3271                         s390_srda (code, s390_r0, 0, 32);
3272                         s390_dr   (code, s390_r0, ins->sreg2);
3273                         s390_lgfr (code, ins->dreg, s390_r0);
3274                 }
3275                         break;
3276                 case OP_IOR: {
3277                         CHECK_SRCDST_COM_I;
3278                         s390_ogr (code, ins->dreg, src2);
3279                 }
3280                         break;
3281                 case OP_IOR_IMM: {
3282                         if (ins->dreg != ins->sreg1) {
3283                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3284                         }
3285                         if (s390_is_imm16 (ins->inst_imm)) {
3286                                 s390_lghi (code, s390_r0, ins->inst_imm);
3287                                 s390_ogr  (code, ins->dreg, s390_r0);
3288                         } else {
3289                                 s390_basr (code, s390_r13, 0);
3290                                 s390_j    (code, 6);
3291                                 s390_llong(code, ins->inst_imm);
3292                                 s390_og   (code, ins->dreg, 0, s390_r13, 4);
3293                         }
3294                 }
3295                         break;
3296                 case OP_IXOR: {
3297                         CHECK_SRCDST_COM_I;
3298                         s390_xgr (code, ins->dreg, src2);
3299                 }
3300                         break;
3301                 case OP_IXOR_IMM: {
3302                         if (ins->dreg != ins->sreg1) {
3303                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3304                         }
3305                         if (s390_is_imm16 (ins->inst_imm)) {
3306                                 s390_lghi (code, s390_r0, ins->inst_imm);
3307                                 s390_xgr  (code, ins->dreg, s390_r0);
3308                         } else {
3309                                 s390_basr (code, s390_r13, 0);
3310                                 s390_j    (code, 6);
3311                                 s390_llong(code, ins->inst_imm);
3312                                 s390_xg   (code, ins->dreg, 0, s390_r13, 4);
3313                         }
3314                 }
3315                         break;
3316                 case OP_ISHL: {
3317                         if (ins->sreg1 != ins->dreg) {
3318                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3319                         }
3320                         s390_sll  (code, ins->dreg, ins->sreg2, 0);
3321                 }
3322                         break;
3323                 case OP_ISHL_IMM: {
3324                         if (ins->sreg1 != ins->dreg) {
3325                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3326                         }
3327                         s390_sll (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3328                 }
3329                         break;
3330                 case OP_ISHR: {
3331                         if (ins->sreg1 != ins->dreg) {
3332                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3333                         }
3334                         s390_sra (code, ins->dreg, ins->sreg2, 0);
3335                 }
3336                         break;
3337                 case OP_ISHR_IMM: {
3338                         if (ins->sreg1 != ins->dreg) {
3339                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3340                         }
3341                         s390_sra (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3342                 }
3343                         break;
3344                 case OP_ISHR_UN_IMM: {
3345                         if (ins->sreg1 != ins->dreg) {
3346                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3347                         }
3348                         s390_srl (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3349                 }
3350                         break;
3351                 case OP_ISHR_UN: {
3352                         if (ins->sreg1 != ins->dreg) {
3353                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3354                         }
3355                         s390_srl  (code, ins->dreg, ins->sreg2, 0);
3356                 }
3357                         break;
3358                 case OP_INOT: {
3359                         if (ins->sreg1 != ins->dreg) {
3360                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3361                         }
3362                         s390_lghi (code, s390_r0, -1);
3363                         s390_xgr  (code, ins->dreg, s390_r0);
3364                 }
3365                         break;
3366                 case OP_INEG: {
3367                         s390_lcgr (code, ins->dreg, ins->sreg1);
3368                 }
3369                         break;
3370                 case OP_IMUL: {
3371                         CHECK_SRCDST_COM_I;
3372                         s390_msr (code, ins->dreg, src2);
3373                 }
3374                         break;
3375                 case OP_IMUL_IMM: {
3376                         if (ins->dreg != ins->sreg1) {
3377                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3378                         }
3379                         if (s390_is_imm16 (ins->inst_imm)) {
3380                                 s390_lghi (code, s390_r13, ins->inst_imm);
3381                         } else {
3382                                 s390_basr (code, s390_r13, 0);
3383                                 s390_j    (code, 4);
3384                                 s390_word (code, ins->inst_imm);
3385                                 s390_lgf  (code, s390_r13, 0, s390_r13, 4);
3386                         }
3387                         s390_msr  (code, ins->dreg, s390_r13);
3388                 }
3389                         break;
3390                 case OP_IMUL_OVF: {
3391                         short int *o[2];
3392                         s390_ltr  (code, s390_r1, ins->sreg1);
3393                         s390_jz   (code, 0); CODEPTR(code, o[0]);
3394                         s390_ltr  (code, s390_r0, ins->sreg2);
3395                         s390_jnz  (code, 6);
3396                         s390_lhi  (code, s390_r1, 0);
3397                         s390_j    (code, 0); CODEPTR(code, o[1]);
3398                         s390_xr   (code, s390_r0, s390_r1);
3399                         s390_msr  (code, s390_r1, ins->sreg2);
3400                         s390_xr   (code, s390_r0, s390_r1);
3401                         s390_srl  (code, s390_r0, 0, 31);
3402                         s390_ltr  (code, s390_r0, s390_r0);
3403                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3404                         PTRSLOT   (code, o[0]);
3405                         PTRSLOT   (code, o[1]);
3406                         s390_lgfr (code, ins->dreg, s390_r1);
3407                 }
3408                         break;
3409                 case OP_IMUL_OVF_UN: {
3410                         s390_lhi  (code, s390_r0, 0);
3411                         s390_lr   (code, s390_r1, ins->sreg1);
3412                         s390_mlr  (code, s390_r0, ins->sreg2);
3413                         s390_ltr  (code, s390_r0, s390_r0);
3414                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3415                         s390_lgfr (code, ins->dreg, s390_r1);
3416                 }
3417                         break;
3418                 case OP_ICONST:
3419                 case OP_I8CONST:
3420                 case OP_SETREGIMM: {
3421                         if (s390_is_imm16(ins->inst_c0)) {
3422                                 s390_lghi (code, ins->dreg, ins->inst_c0);
3423                         } else {
3424                                 s390_basr (code, s390_r13, 0);
3425                                 s390_j    (code, 6);
3426                                 s390_llong(code, ins->inst_c0);
3427                                 s390_lg   (code, ins->dreg, 0, s390_r13, 4);
3428                         }
3429                 }
3430                         break;
3431                 case OP_AOTCONST: {
3432                         s390_basr (code, s390_r13, 0);
3433                         s390_j    (code, 6);
3434                         mono_add_patch_info (cfg, code - cfg->native_code,
3435                                 (MonoJumpInfoType)ins->inst_i1, ins->inst_p0);
3436                         s390_llong(code, 0);
3437                         s390_lg   (code,ins->dreg, 0, s390_r13, 4);
3438                 }
3439                         break;
3440                 case CEE_CONV_I:
3441                 case CEE_CONV_I8:
3442                 case OP_SEXT_I4:
3443                 case OP_MOVE:
3444                 case OP_SETREG: {
3445                         if (ins->dreg != ins->sreg1) {
3446                                 s390_lgr (code, ins->dreg, ins->sreg1);
3447                         }
3448                 }
3449                         break;
3450                 case CEE_CONV_I4:
3451                         s390_lgfr (code, ins->dreg, ins->sreg1);
3452                         break;
3453                 case CEE_CONV_U:
3454                 case CEE_CONV_U8:
3455                 case CEE_CONV_U4:
3456                         s390_llgfr (code, ins->dreg, ins->sreg1);
3457                         break;
3458                 case CEE_CONV_OVF_U4:
3459                         s390_basr (code, s390_r13, 0);
3460                         s390_j    (code, 6);
3461                         s390_llong(code, 4294967295);
3462                         s390_clg  (code, ins->sreg1, 0, s390_r13, 4);
3463                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GT, "OverflowException");
3464                         s390_ltgr (code, ins->sreg1, ins->sreg1);
3465                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, "OverflowException");
3466                         s390_llgfr(code, ins->dreg, ins->sreg1);
3467                         break;
3468                 case CEE_CONV_OVF_I4_UN:
3469                         s390_basr (code, s390_r13, 0);
3470                         s390_j    (code, 6);
3471                         s390_llong(code, 2147483647);
3472                         s390_cg   (code, ins->sreg1, 0, s390_r13, 4);
3473                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GT, "OverflowException");
3474                         s390_ltgr (code, ins->sreg1, ins->sreg1);
3475                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, "OverflowException");
3476                         s390_lgfr (code, ins->dreg, ins->sreg1);
3477                         break;
3478                 case OP_SETFREG:
3479                 case OP_FMOVE: {
3480                         if (ins->dreg != ins->sreg1) {
3481                                 s390_ldr   (code, ins->dreg, ins->sreg1);
3482                         }
3483                 }
3484                         break;
3485                 case OP_S390_SETF4RET: {
3486                         s390_ledbr (code, ins->dreg, ins->sreg1);
3487                 }
3488                         break;
3489                 case OP_FCONV_TO_R4: {
3490                         g_error ("Shouldn't be reached");
3491                         next = mono_inst_list_next (&ins->node, &bb->ins_list);
3492                         if ((next) &&
3493                             (next->opcode != OP_FMOVE) &&
3494                             (next->opcode != OP_STORER4_MEMBASE_REG))
3495                                 s390_ledbr (code, ins->dreg, ins->sreg1);
3496                 }
3497                         break;
3498                 case OP_JMP: {
3499                         if (cfg->method->save_lmf)
3500                                 restoreLMF(code, cfg->frame_reg, cfg->stack_usage);
3501
3502                         if (cfg->flags & MONO_CFG_HAS_TAIL) {
3503                                 code =  emit_load_volatile_registers(code, cfg);
3504                         }
3505
3506                         code = backUpStackPtr(cfg, code);
3507                         s390_lg  (code, s390_r14, 0, STK_BASE, S390_RET_ADDR_OFFSET);
3508                         mono_add_patch_info (cfg, code - cfg->native_code,
3509                                              MONO_PATCH_INFO_METHOD_JUMP,
3510                                              ins->inst_p0);
3511                         s390_jcl (code, S390_CC_UN, 0);
3512                 }
3513                         break;
3514                 case OP_CHECK_THIS: {
3515                         /* ensure ins->sreg1 is not NULL */
3516                         s390_lg   (code, s390_r0, 0, ins->sreg1, 0);
3517                         s390_ltgr (code, s390_r0, s390_r0);
3518                 }
3519                         break;
3520                 case OP_ARGLIST: {
3521                         int offset = cfg->sig_cookie + cfg->stack_usage;
3522
3523                         if (s390_is_imm16 (offset))
3524                                 s390_lghi (code, s390_r0, offset);
3525                         else {
3526                                 s390_basr (code, s390_r13, 0);
3527                                 s390_j    (code, 6);
3528                                 s390_llong(code, offset);
3529                                 s390_lg   (code, s390_r0, 0, s390_r13, 0);
3530                         }
3531                         s390_agr  (code, s390_r0, cfg->frame_reg);
3532                         s390_stg  (code, s390_r0, 0, ins->sreg1, 0);
3533                 }
3534                         break;
3535                 case OP_FCALL: {
3536                         s390_basr (code, s390_r13, 0);
3537                         s390_j    (code, 6);
3538                         call = (MonoCallInst*)ins;
3539                         if (ins->flags & MONO_INST_HAS_METHOD)
3540                                 mono_add_patch_info (cfg, code-cfg->native_code,
3541                                                      MONO_PATCH_INFO_METHOD,
3542                                                      call->method);
3543                         else
3544                                 mono_add_patch_info (cfg, code-cfg->native_code,
3545                                                      MONO_PATCH_INFO_ABS,
3546                                                      call->fptr);
3547                         s390_llong(code, 0);
3548                         s390_lg   (code, s390_r14, 0, s390_r13, 4);
3549                         s390_basr (code, s390_r14, s390_r14);
3550                         if (call->signature->ret->type == MONO_TYPE_R4)
3551                                 s390_ldebr (code, s390_f0, s390_f0);
3552                 }
3553                         break;
3554                 case OP_LCALL:
3555                 case OP_VCALL:
3556                 case OP_VOIDCALL:
3557                 case CEE_CALL: {
3558                         s390_basr (code, s390_r13, 0);
3559                         s390_j    (code, 6);
3560                         call = (MonoCallInst*)ins;
3561                         if (ins->flags & MONO_INST_HAS_METHOD)
3562                                 mono_add_patch_info (cfg, code-cfg->native_code,
3563                                                      MONO_PATCH_INFO_METHOD,
3564                                                      call->method);
3565                         else
3566                                 mono_add_patch_info (cfg, code-cfg->native_code,
3567                                                      MONO_PATCH_INFO_ABS,
3568                                                      call->fptr);
3569                         s390_llong(code, 0);
3570                         s390_lg   (code, s390_r14, 0, s390_r13, 4);
3571                         s390_basr (code, s390_r14, s390_r14);
3572                 }
3573                         break;
3574                 case OP_FCALL_REG: {
3575                         call = (MonoCallInst*)ins;
3576                         s390_lgr  (code, s390_r1, ins->sreg1);
3577                         s390_basr (code, s390_r14, s390_r1);
3578                         if (call->signature->ret->type == MONO_TYPE_R4)
3579                                 s390_ldebr (code, s390_f0, s390_f0);
3580                 }
3581                         break;
3582                 case OP_LCALL_REG:
3583                 case OP_VCALL_REG:
3584                 case OP_VOIDCALL_REG:
3585                 case OP_CALL_REG: {
3586                         s390_lgr  (code, s390_r1, ins->sreg1);
3587                         s390_basr (code, s390_r14, s390_r1);
3588                 }
3589                         break;
3590                 case OP_FCALL_MEMBASE: {
3591                         call = (MonoCallInst*)ins;
3592                         s390_lg   (code, s390_r1, 0, ins->sreg1, ins->inst_offset);
3593                         s390_basr (code, s390_r14, s390_r1);
3594                         if (call->signature->ret->type == MONO_TYPE_R4)
3595                                 s390_ldebr (code, s390_f0, s390_f0);
3596                 }
3597                         break;
3598                 case OP_LCALL_MEMBASE:
3599                 case OP_VCALL_MEMBASE:
3600                 case OP_VOIDCALL_MEMBASE:
3601                 case OP_CALL_MEMBASE: {
3602                         s390_lg   (code, s390_r1, 0, ins->sreg1, ins->inst_offset);
3603                         s390_basr (code, s390_r14, s390_r1);
3604                 }
3605                         break;
3606                 case OP_OUTARG:
3607                         g_assert_not_reached ();
3608                         break;
3609                 case OP_LOCALLOC: {
3610                         int alloca_skip = S390_MINIMAL_STACK_SIZE + cfg->param_area;
3611                         int area_offset = S390_ALIGN(alloca_skip, S390_STACK_ALIGNMENT);
3612                         s390_lgr  (code, s390_r1, ins->sreg1);
3613                         if (ins->flags & MONO_INST_INIT)
3614                                 s390_lgr  (code, s390_r0, ins->sreg1);
3615                         s390_aghi (code, s390_r1, 14);
3616                         s390_srlg (code, s390_r1, s390_r1, 0, 3);
3617                         s390_sllg (code, s390_r1, s390_r1, 0, 3);
3618                         if (cfg->method->save_lmf) {
3619                                 /*----------------------------------*/
3620                                 /* we have to adjust lmf ebp value  */
3621                                 /*----------------------------------*/
3622                                 int lmfOffset = cfg->stack_usage - sizeof(MonoLMF);
3623
3624                                 s390_lgr (code, s390_r13, cfg->frame_reg);
3625                                 if (s390_is_uimm16(lmfOffset))
3626                                         s390_aghi (code, s390_r13, lmfOffset);
3627                                 else {
3628                                         s390_basr (code, s390_r14, 0);
3629                                         s390_j    (code, 4);
3630                                         s390_word (code, lmfOffset);
3631                                         s390_agf  (code, s390_r13, 0, s390_r14, 4);
3632                                 }
3633                                 s390_lgr (code, s390_r14, STK_BASE);
3634                                 s390_sgr (code, s390_r14, s390_r1);
3635                                 s390_stg (code, s390_r14, 0, s390_r13,
3636                                           G_STRUCT_OFFSET(MonoLMF, ebp));
3637                         }
3638                         s390_lg   (code, s390_r13, 0, STK_BASE, 0);
3639                         s390_sgr  (code, STK_BASE, s390_r1);
3640                         s390_stg  (code, s390_r13, 0, STK_BASE, 0);
3641                         s390_la   (code, ins->dreg, 0, STK_BASE, area_offset);
3642                         s390_srlg (code, ins->dreg, ins->dreg, 0, 3);
3643                         s390_sllg (code, ins->dreg, ins->dreg, 0, 3);
3644                         if (ins->flags & MONO_INST_INIT) {
3645                                 s390_lgr  (code, s390_r1, s390_r0);
3646                                 s390_lgr  (code, s390_r0, ins->dreg);
3647                                 s390_lgr  (code, s390_r14, s390_r12);
3648                                 s390_lghi (code, s390_r13, 0);
3649                                 s390_mvcle(code, s390_r0, s390_r12, 0, 0);
3650                                 s390_jo   (code, -2);
3651                                 s390_lgr  (code, s390_r12, s390_r14);
3652                         }
3653                 }
3654                         break;
3655                 case CEE_RET: {
3656                         s390_br  (code, s390_r14);
3657                 }
3658                         break;
3659                 case OP_THROW: {
3660                         s390_lgr  (code, s390_r2, ins->sreg1);
3661                         s390_basr (code, s390_r13, 0);
3662                         s390_j    (code, 6);
3663                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD,
3664                                              (gpointer) "mono_arch_throw_exception");
3665                         s390_llong(code, 0);
3666                         s390_lg   (code, s390_r14, 0, s390_r13, 4);
3667                         s390_basr (code, s390_r14, s390_r14);
3668                 }
3669                         break;
3670                 case OP_RETHROW: {
3671                         s390_lgr  (code, s390_r2, ins->sreg1);
3672                         s390_basr (code, s390_r13, 0);
3673                         s390_j    (code, 6);
3674                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD,
3675                                              (gpointer) "mono_arch_rethrow_exception");
3676                         s390_llong(code, 0);
3677                         s390_lg   (code, s390_r14, 0, s390_r13, 4);
3678                         s390_basr (code, s390_r14, s390_r14);
3679                 }
3680                         break;
3681                 case OP_START_HANDLER: {
3682                         S390_LONG (code, stg, stg, s390_r14, 0,
3683                                    ins->inst_left->inst_basereg,
3684                                    ins->inst_left->inst_offset);
3685                 }
3686                         break;
3687                 case OP_ENDFILTER: {
3688                         if (ins->sreg1 != s390_r2)
3689                                 s390_lgr(code, s390_r2, ins->sreg1);
3690                         S390_LONG (code, lg, lg, s390_r14, 0,
3691                                    ins->inst_left->inst_basereg,
3692                                    ins->inst_left->inst_offset);
3693                         s390_br  (code, s390_r14);
3694                 }
3695                         break;
3696                 case OP_ENDFINALLY: {
3697                         S390_LONG (code, lg, lg, s390_r14, 0,
3698                                    ins->inst_left->inst_basereg,
3699                                    ins->inst_left->inst_offset);
3700                         s390_br  (code, s390_r14);
3701                 }
3702                         break;
3703                 case OP_CALL_HANDLER: {
3704                         mono_add_patch_info (cfg, code-cfg->native_code,
3705                                              MONO_PATCH_INFO_BB, ins->inst_target_bb);
3706                         s390_brasl (code, s390_r14, 0);
3707                 }
3708                         break;
3709                 case OP_LABEL: {
3710                         ins->inst_c0 = code - cfg->native_code;
3711                 }
3712                         break;
3713                 case OP_BR:
3714                         EMIT_UNCOND_BRANCH(ins);
3715                         break;
3716                 case OP_BR_REG: {
3717                         s390_br  (code, ins->sreg1);
3718                 }
3719                         break;
3720                 case OP_CEQ:
3721                 case OP_ICEQ: {
3722                         s390_lghi(code, ins->dreg, 1);
3723                         s390_jz  (code, 4);
3724                         s390_lghi(code, ins->dreg, 0);
3725                 }
3726                         break;
3727                 case OP_CLT:
3728                 case OP_ICLT: {
3729                         s390_lghi(code, ins->dreg, 1);
3730                         s390_jl  (code, 4);
3731                         s390_lghi(code, ins->dreg, 0);
3732                 }
3733                         break;
3734                 case OP_CLT_UN:
3735                 case OP_ICLT_UN: {
3736                         s390_lghi(code, ins->dreg, 1);
3737                         s390_jlo (code, 4);
3738                         s390_lghi(code, ins->dreg, 0);
3739                 }
3740                         break;
3741                 case OP_CGT:
3742                 case OP_ICGT: {
3743                         s390_lghi(code, ins->dreg, 1);
3744                         s390_jh  (code, 4);
3745                         s390_lghi(code, ins->dreg, 0);
3746                 }
3747                         break;
3748                 case OP_CGT_UN:
3749                 case OP_ICGT_UN: {
3750                         s390_lghi(code, ins->dreg, 1);
3751                         s390_jho (code, 4);
3752                         s390_lghi(code, ins->dreg, 0);
3753                 }
3754                         break;
3755                 case OP_COND_EXC_EQ:
3756                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_EQ, ins->inst_p1);
3757                         break;
3758                 case OP_COND_EXC_NE_UN:
3759                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NE, ins->inst_p1);
3760                         break;
3761                 case OP_COND_EXC_LT:
3762                 case OP_COND_EXC_LT_UN:
3763                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, ins->inst_p1);
3764                         break;
3765                 case OP_COND_EXC_GT:
3766                 case OP_COND_EXC_GT_UN:
3767                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GT, ins->inst_p1);
3768                         break;
3769                 case OP_COND_EXC_GE:
3770                 case OP_COND_EXC_GE_UN:
3771                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GE, ins->inst_p1);
3772                         break;
3773                 case OP_COND_EXC_LE:
3774                 case OP_COND_EXC_LE_UN:
3775                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LE, ins->inst_p1);
3776                         break;
3777                 case OP_COND_EXC_OV:
3778                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, ins->inst_p1);
3779                         break;
3780                 case OP_COND_EXC_NO:
3781                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NO, ins->inst_p1);
3782                         break;
3783                 case OP_COND_EXC_C:
3784                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, ins->inst_p1);
3785                         break;
3786                 case OP_COND_EXC_NC:
3787                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, ins->inst_p1);
3788                         break;
3789                 case CEE_BEQ:
3790                 case OP_IBEQ:
3791                         EMIT_COND_BRANCH (ins, S390_CC_EQ);
3792                         break;
3793                 case CEE_BNE_UN:
3794                 case OP_IBNE_UN:
3795                         EMIT_COND_BRANCH (ins, S390_CC_NE);
3796                         break;
3797                 case CEE_BLT:
3798                 case CEE_BLT_UN:
3799                 case OP_IBLT:
3800                 case OP_IBLT_UN:
3801                         EMIT_COND_BRANCH (ins, S390_CC_LT);
3802                         break;
3803                 case CEE_BGT:
3804                 case CEE_BGT_UN:
3805                 case OP_IBGT:
3806                 case OP_IBGT_UN:
3807                         EMIT_COND_BRANCH (ins, S390_CC_GT);
3808                         break;
3809                 case CEE_BGE:
3810                 case CEE_BGE_UN:
3811                 case OP_IBGE:
3812                 case OP_IBGE_UN:
3813                         EMIT_COND_BRANCH (ins, S390_CC_GE);
3814                         break;
3815                 case CEE_BLE:
3816                 case CEE_BLE_UN:
3817                 case OP_IBLE:
3818                 case OP_IBLE_UN:
3819                         EMIT_COND_BRANCH (ins, S390_CC_LE);
3820                         break;
3821
3822                 /* floating point opcodes */
3823                 case OP_R8CONST: {
3824                         if (*((float *) ins->inst_p0) == 0) {
3825                                 s390_lzdr (code, ins->dreg);
3826                         } else {
3827                                 s390_basr  (code, s390_r13, 0);
3828                                 s390_j     (code, 6);
3829                                 s390_llong (code, ins->inst_p0);
3830                                 s390_lg    (code, s390_r13, 0, s390_r13, 4);
3831                                 s390_ld    (code, ins->dreg, 0, s390_r13, 0);
3832                         }
3833                 }
3834                         break;
3835                 case OP_R4CONST: {
3836                         if (*((float *) ins->inst_p0) == 0) {
3837                                 s390_lzdr (code, ins->dreg);
3838                         } else {
3839                                 s390_basr (code, s390_r13, 0);
3840                                 s390_j    (code, 6);
3841                                 s390_llong(code, ins->inst_p0);
3842                                 s390_lg   (code, s390_r13, 0, s390_r13, 4);
3843                                 s390_ldeb (code, ins->dreg, 0, s390_r13, 0);
3844                         }
3845                 }
3846                         break;
3847                 case OP_STORER8_MEMBASE_REG: {
3848                         S390_LONG (code, stdy, std, ins->sreg1, 0,
3849                                    ins->inst_destbasereg, ins->inst_offset);
3850                 }
3851                         break;
3852                 case OP_LOADR8_MEMBASE: {
3853                         S390_LONG (code, ldy, ld, ins->dreg, 0,
3854                                    ins->inst_basereg, ins->inst_offset);
3855                 }
3856                         break;
3857                 case OP_STORER4_MEMBASE_REG: {
3858                         s390_ledbr (code, s390_f15, ins->sreg1);
3859                         S390_LONG (code, stey, ste, s390_f15, 0,
3860                                    ins->inst_destbasereg, ins->inst_offset);
3861                 }
3862                         break;
3863                 case OP_LOADR4_MEMBASE: {
3864                         S390_LONG (code, ldy, ld, s390_f15, 0,
3865                                    ins->inst_basereg, ins->inst_offset);
3866                         s390_ldebr (code, ins->dreg, s390_f15);
3867                 }
3868                         break;
3869                 case CEE_CONV_R_UN: {
3870                         s390_cdgbr (code, ins->dreg, ins->sreg1);
3871                         s390_ltgr  (code, ins->sreg1, ins->sreg1);
3872                         s390_jnl   (code, 12);
3873                         s390_basr  (code, s390_r13, 0);
3874                         s390_j     (code, 6);
3875                         s390_word  (code, 0x41f00000);
3876                         s390_word  (code, 0);
3877                         s390_adb   (code, ins->dreg, 0, s390_r13, 4);
3878                 }
3879                         break;
3880                 case OP_LCONV_TO_R4:
3881                 case CEE_CONV_R4: {
3882                         s390_cdgbr (code, ins->dreg, ins->sreg1);
3883                 }
3884                         break;
3885                 case OP_LCONV_TO_R8:
3886                 case CEE_CONV_R8: {
3887                         s390_cdgbr (code, ins->dreg, ins->sreg1);
3888                 }
3889                         break;
3890                 case OP_FCONV_TO_I1:
3891                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 1, TRUE);
3892                         break;
3893                 case OP_FCONV_TO_U1:
3894                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 1, FALSE);
3895                         break;
3896                 case OP_FCONV_TO_I2:
3897                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 2, TRUE);
3898                         break;
3899                 case OP_FCONV_TO_U2:
3900                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 2, FALSE);
3901                         break;
3902                 case OP_FCONV_TO_I4:
3903                 case OP_FCONV_TO_I:
3904                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 4, TRUE);
3905                         break;
3906                 case OP_FCONV_TO_U4:
3907                 case OP_FCONV_TO_U:
3908                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 4, FALSE);
3909                         break;
3910                 case OP_FCONV_TO_I8:
3911                         s390_cgdbr (code, ins->dreg, 5, ins->sreg1);
3912                         break;
3913                 case OP_FCONV_TO_U8:
3914                         g_assert_not_reached ();
3915                         /* Implemented as helper calls */
3916                         break;
3917                 case OP_LCONV_TO_R_UN:
3918                         g_assert_not_reached ();
3919                         /* Implemented as helper calls */
3920                         break;
3921                 case OP_LCONV_TO_OVF_I: {
3922                         /* Valid ints: 0xffffffff:8000000 to 00000000:0x7f000000 */
3923                         short int *o[5];
3924                         s390_ltgr (code, ins->sreg2, ins->sreg2);
3925                         s390_jnl  (code, 0); CODEPTR(code, o[0]);
3926                         s390_ltgr (code, ins->sreg1, ins->sreg1);
3927                         s390_jnl  (code, 0); CODEPTR(code, o[1]);
3928                         s390_lhi  (code, s390_r13, -1);
3929                         s390_cgr  (code, ins->sreg1, s390_r13);
3930                         s390_jnz  (code, 0); CODEPTR(code, o[2]);
3931                         if (ins->dreg != ins->sreg2)
3932                                 s390_lgr  (code, ins->dreg, ins->sreg2);
3933                         s390_j    (code, 0); CODEPTR(code, o[3]);
3934                         PTRSLOT(code, o[0]);
3935                         s390_jz   (code, 0); CODEPTR(code, o[4]);
3936                         PTRSLOT(code, o[1]);
3937                         PTRSLOT(code, o[2]);
3938                         mono_add_patch_info (cfg, code - cfg->native_code,
3939                                              MONO_PATCH_INFO_EXC, "OverflowException");
3940                         s390_brasl (code, s390_r14, 0);
3941                         PTRSLOT(code, o[3]);
3942                         PTRSLOT(code, o[4]);
3943                 }
3944                         break;
3945                 case OP_ABS: {
3946                         s390_lpdbr (code, ins->dreg, ins->sreg1);
3947                 }
3948                         break;
3949                 case OP_SQRT: {
3950                         s390_sqdbr (code, ins->dreg, ins->sreg1);
3951                 }
3952                         break;
3953                 case OP_FADD: {
3954                         CHECK_SRCDST_COM_F;
3955                         s390_adbr (code, ins->dreg, src2);
3956                 }
3957                         break;
3958                 case OP_FSUB: {
3959                         CHECK_SRCDST_NCOM_F;
3960                         s390_sdbr (code, ins->dreg, src2);
3961                 }
3962                         break;
3963                 case OP_FMUL: {
3964                         CHECK_SRCDST_COM_F;
3965                         s390_mdbr (code, ins->dreg, src2);
3966                 }
3967                         break;
3968                 case OP_FDIV: {
3969                         CHECK_SRCDST_NCOM_F;
3970                         s390_ddbr (code, ins->dreg, src2);
3971                 }
3972                         break;
3973                 case OP_FNEG: {
3974                         s390_lcdbr (code, ins->dreg, ins->sreg1);
3975                 }
3976                         break;
3977                 case OP_FREM: {
3978                         CHECK_SRCDST_NCOM_F;
3979                         s390_didbr (code, ins->dreg, src2, 5, s390_f15);
3980                 }
3981                         break;
3982                 case OP_FCOMPARE: {
3983                         s390_cdbr (code, ins->sreg1, ins->sreg2);
3984                 }
3985                         break;
3986                 case OP_FCEQ: {
3987                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3988                         s390_lghi  (code, ins->dreg, 1);
3989                         s390_je    (code, 4);
3990                         s390_lghi  (code, ins->dreg, 0);
3991                 }
3992                         break;
3993                 case OP_FCLT: {
3994                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3995                         s390_lghi  (code, ins->dreg, 1);
3996                         s390_jl    (code, 4);
3997                         s390_lghi  (code, ins->dreg, 0);
3998                 }
3999                         break;
4000                 case OP_FCLT_UN: {
4001                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4002                         s390_lghi  (code, ins->dreg, 1);
4003                         s390_jlo   (code, 4);
4004                         s390_lghi  (code, ins->dreg, 0);
4005                 }
4006                         break;
4007                 case OP_FCGT: {
4008                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4009                         s390_lghi  (code, ins->dreg, 1);
4010                         s390_jh    (code, 4);
4011                         s390_lghi  (code, ins->dreg, 0);
4012                 }
4013                         break;
4014                 case OP_FCGT_UN: {
4015                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4016                         s390_lghi  (code, ins->dreg, 1);
4017                         s390_jho   (code, 4);
4018                         s390_lghi  (code, ins->dreg, 0);
4019                 }
4020                         break;
4021                 case OP_FBEQ: {
4022                         short *o;
4023                         s390_jo (code, 0); CODEPTR(code, o);
4024                         EMIT_COND_BRANCH (ins, S390_CC_EQ);
4025                         PTRSLOT (code, o);
4026                 }
4027                         break;
4028                 case OP_FBNE_UN:
4029                         EMIT_COND_BRANCH (ins, S390_CC_NE|S390_CC_OV);
4030                         break;
4031                 case OP_FBLT: {
4032                         short *o;
4033                         s390_jo (code, 0); CODEPTR(code, o);
4034                         EMIT_COND_BRANCH (ins, S390_CC_LT);
4035                         PTRSLOT (code, o);
4036                 }
4037                         break;
4038                 case OP_FBLT_UN:
4039                         EMIT_COND_BRANCH (ins, S390_CC_LT|S390_CC_OV);
4040                         break;
4041                 case OP_FBGT: {
4042                         short *o;
4043                         s390_jo (code, 0); CODEPTR(code, o);
4044                         EMIT_COND_BRANCH (ins, S390_CC_GT);
4045                         PTRSLOT (code, o);
4046                 }
4047                         break;
4048                 case OP_FBGT_UN:
4049                         EMIT_COND_BRANCH (ins, S390_CC_GT|S390_CC_OV);
4050                         break;
4051                 case OP_FBGE: {
4052                         short *o;
4053                         s390_jo (code, 0); CODEPTR(code, o);
4054                         EMIT_COND_BRANCH (ins, S390_CC_GE);
4055                         PTRSLOT (code, o);
4056                 }
4057                         break;
4058                 case OP_FBGE_UN:
4059                         EMIT_COND_BRANCH (ins, S390_CC_GE|S390_CC_OV);
4060                         break;
4061                 case OP_FBLE: {
4062                         short *o;
4063                         s390_jo (code, 0); CODEPTR(code, o);
4064                         EMIT_COND_BRANCH (ins, S390_CC_LE);
4065                         PTRSLOT (code, o);
4066                 }
4067                         break;
4068                 case OP_FBLE_UN:
4069                         EMIT_COND_BRANCH (ins, S390_CC_LE|S390_CC_OV);
4070                         break;
4071                 case OP_CKFINITE: {
4072                         short *o;
4073                         s390_lhi  (code, s390_r13, 0x7f);
4074                         s390_tcdb (code, ins->sreg1, 0, s390_r13, 0);
4075                         s390_jz   (code, 0); CODEPTR(code, o);
4076                         mono_add_patch_info (cfg, code - cfg->native_code,
4077                                              MONO_PATCH_INFO_EXC, "ArithmeticException");
4078                         s390_brasl (code, s390_r14,0);
4079                         PTRSLOT(code, o);
4080                 }
4081                         break;
4082                 case OP_S390_MOVE: {
4083                         if (ins->backend.size > 0) {
4084                                 if (ins->backend.size <= 256) {
4085                                         s390_mvc  (code, ins->backend.size, ins->dreg,
4086                                                    ins->inst_offset, ins->sreg1, ins->inst_imm);
4087                                 } else {
4088                                         s390_lgr  (code, s390_r0, ins->dreg);
4089                                         if (s390_is_imm16 (ins->inst_offset)) {
4090                                                 s390_aghi (code, s390_r0, ins->inst_offset);
4091                                         } else {
4092                                                 s390_basr (code, s390_r13, 0);
4093                                                 s390_j    (code, 6);
4094                                                 s390_llong(code, ins->inst_offset);
4095                                                 s390_a    (code, s390_r0, 0, s390_r13, 4);
4096                                         }
4097                                         s390_lgr  (code, s390_r12, ins->sreg1);
4098                                         if (s390_is_imm16 (ins->inst_imm)) {
4099                                                 s390_aghi (code, s390_r12, ins->inst_imm);
4100                                         } else {
4101                                                 s390_basr (code, s390_r13, 0);
4102                                                 s390_j    (code, 6);
4103                                                 s390_llong(code, ins->inst_imm);
4104                                                 s390_ag   (code, s390_r12, 0, s390_r13, 4);
4105                                         }
4106                                         s390_lgr  (code, s390_r1, ins->sreg1);
4107                                         s390_lgr  (code, s390_r13, s390_r1);
4108                                         s390_mvcle(code, s390_r0, s390_r12, 0, 0);
4109                                         s390_jo   (code, -2);
4110                                 }
4111                         }
4112                 }
4113                         break;
4114                 case OP_ATOMIC_ADD_I8: {
4115                         s390_lgr (code, s390_r1, ins->sreg2);
4116                         s390_lg  (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4117                         s390_agr (code, s390_r1, s390_r0);
4118                         s390_csg (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
4119                         s390_jnz (code, -10);
4120                         s390_lgr (code, ins->dreg, s390_r1);
4121                 }
4122                         break;
4123                 case OP_ATOMIC_ADD_NEW_I8: {
4124                         s390_lgr (code, s390_r1, ins->sreg2);
4125                         s390_lg  (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4126                         s390_agr (code, s390_r1, s390_r0);
4127                         s390_csg (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
4128                         s390_jnz (code, -10);
4129                         s390_lgr (code, ins->dreg, s390_r1);
4130                 }
4131                         break;
4132                 case OP_ATOMIC_EXCHANGE_I8: {
4133                         s390_lg  (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4134                         s390_csg (code, s390_r0, ins->sreg2, ins->inst_basereg, ins->inst_offset);
4135                         s390_jnz (code, -6);
4136                         s390_lgr (code, ins->dreg, s390_r0);
4137                 }
4138                         break;
4139                 case OP_ATOMIC_ADD_I4: {
4140                         s390_lgfr(code, s390_r1, ins->sreg2);
4141                         s390_lgf (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4142                         s390_agr (code, s390_r1, s390_r0);
4143                         s390_cs  (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
4144                         s390_jnz (code, -9);
4145                         s390_lgfr(code, ins->dreg, s390_r1);
4146                 }
4147                         break;
4148                 case OP_ATOMIC_ADD_NEW_I4: {
4149                         s390_lgfr(code, s390_r1, ins->sreg2);
4150                         s390_lgf (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4151                         s390_agr (code, s390_r1, s390_r0);
4152                         s390_cs  (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
4153                         s390_jnz (code, -9);
4154                         s390_lgfr(code, ins->dreg, s390_r1);
4155                 }
4156                         break;
4157                 case OP_ATOMIC_EXCHANGE_I4: {
4158                         s390_lg  (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4159                         s390_cs  (code, s390_r0, ins->sreg2, ins->inst_basereg, ins->inst_offset);
4160                         s390_jnz (code, -4);
4161                         s390_lgfr(code, ins->dreg, s390_r0);
4162                 }
4163                         break;
4164                 case OP_S390_BKCHAIN: {
4165                         s390_lgr  (code, ins->dreg, ins->sreg1);
4166                         if (s390_is_imm16 (cfg->stack_offset)) {
4167                                 s390_aghi (code, ins->dreg, cfg->stack_offset);
4168                         } else {
4169                                 s390_basr (code, s390_r13, 0);
4170                                 s390_j    (code, 6);
4171                                 s390_llong(code, cfg->stack_offset);
4172                                 s390_ag   (code, ins->dreg, 0, s390_r13, 4);
4173                         }
4174                 }
4175                         break;
4176                 case OP_MEMORY_BARRIER: {
4177                 }
4178                         break;
4179                 default:
4180                         g_warning ("unknown opcode %s in %s()\n", mono_inst_name (ins->opcode), __FUNCTION__);
4181                         g_assert_not_reached ();
4182                 }
4183
4184                 if ((cfg->opt & MONO_OPT_BRANCH) && ((code - cfg->native_code - offset) > max_len)) {
4185                         g_warning ("wrong maximal instruction length of instruction %s (expected %d, got %ld)",
4186                                    mono_inst_name (ins->opcode), max_len, code - cfg->native_code - offset);
4187                         g_assert_not_reached ();
4188                 }
4189
4190                 cpos += max_len;
4191
4192                 last_offset = offset;
4193         }
4194
4195         cfg->code_len = code - cfg->native_code;
4196 }
4197
4198 /*========================= End of Function ========================*/
4199
4200 /*------------------------------------------------------------------*/
4201 /*                                                                  */
4202 /* Name         - mono_arch_register_lowlevel_calls                 */
4203 /*                                                                  */
4204 /* Function     - Register routines to help with --trace operation. */
4205 /*                                                                  */
4206 /*------------------------------------------------------------------*/
4207
4208 void
4209 mono_arch_register_lowlevel_calls (void)
4210 {
4211         mono_register_jit_icall (mono_arch_get_lmf_addr, "mono_arch_get_lmf_addr", NULL, TRUE);
4212 }
4213
4214 /*========================= End of Function ========================*/
4215
4216 /*------------------------------------------------------------------*/
4217 /*                                                                  */
4218 /* Name         - mono_arch_patch_code                              */
4219 /*                                                                  */
4220 /* Function     - Process the patch data created during the         */
4221 /*                instruction build process. This resolves jumps,   */
4222 /*                calls, variables etc.                             */
4223 /*                                                                  */
4224 /*------------------------------------------------------------------*/
4225
4226 void
4227 mono_arch_patch_code (MonoMethod *method, MonoDomain *domain,
4228                       guint8 *code, MonoJumpInfo *ji, gboolean run_cctors)
4229 {
4230         MonoJumpInfo *patch_info;
4231
4232         for (patch_info = ji; patch_info; patch_info = patch_info->next) {
4233                 unsigned char *ip = patch_info->ip.i + code;
4234                 gconstpointer target = NULL;
4235
4236                 target = mono_resolve_patch_target (method, domain, code,
4237                                                     patch_info, run_cctors);
4238
4239                 switch (patch_info->type) {
4240                         case MONO_PATCH_INFO_IP:
4241                         case MONO_PATCH_INFO_EXC_NAME:
4242                         case MONO_PATCH_INFO_LDSTR:
4243                         case MONO_PATCH_INFO_TYPE_FROM_HANDLE:
4244                         case MONO_PATCH_INFO_LDTOKEN:
4245                         case MONO_PATCH_INFO_EXC:
4246                         case MONO_PATCH_INFO_ABS:
4247                         case MONO_PATCH_INFO_METHOD:
4248                         case MONO_PATCH_INFO_INTERNAL_METHOD:
4249                         case MONO_PATCH_INFO_CLASS_INIT:
4250                                 s390_patch_addr (ip, (guint64) target);
4251                                 continue;
4252                         case MONO_PATCH_INFO_SWITCH:
4253                                 /*----------------------------------*/
4254                                 /* ip points at the basr r13,0/j +4 */
4255                                 /* instruction the vtable value     */
4256                                 /* follows this (i.e. ip+6)         */
4257                                 /*----------------------------------*/
4258                                 *((gconstpointer *)(ip+6)) = target;
4259                                 continue;
4260                         case MONO_PATCH_INFO_METHODCONST:
4261                         case MONO_PATCH_INFO_CLASS:
4262                         case MONO_PATCH_INFO_IMAGE:
4263                         case MONO_PATCH_INFO_FIELD:
4264                         case MONO_PATCH_INFO_IID:
4265                                 target = S390_RELATIVE(target, ip);
4266                                 s390_patch_rel (ip, (guint64) target);
4267                                 continue;
4268                         case MONO_PATCH_INFO_R4:
4269                         case MONO_PATCH_INFO_R8:
4270                         case MONO_PATCH_INFO_METHOD_REL:
4271                                 g_assert_not_reached ();
4272                                 continue;
4273                         default:
4274                                 target = S390_RELATIVE(target, ip);
4275                                 ip += 2;
4276                                 s390_patch_rel (ip, (guint64) target);
4277                 }
4278         }
4279 }
4280
4281 /*========================= End of Function ========================*/
4282
4283 /*------------------------------------------------------------------*/
4284 /*                                                                  */
4285 /* Name         - emit_load_volatile_registers                      */
4286 /*                                                                  */
4287 /* Function     - Emit the instructions to reload parameter regist- */
4288 /*                registers for use with "tail" operations.         */
4289 /*                                                                  */
4290 /*                The register loading operations performed here    */
4291 /*                are the mirror of the store operations performed  */
4292 /*                in mono_arch_emit_prolog and need to be kept in   */
4293 /*                synchronization with it.                          */
4294 /*                                                                  */
4295 /*------------------------------------------------------------------*/
4296
4297 guint8 *
4298 emit_load_volatile_registers (guint8 *code, MonoCompile *cfg)
4299 {
4300         MonoInst *inst;
4301         MonoMethod *method = cfg->method;
4302         MonoMethodSignature *sig = mono_method_signature(method);
4303         int pos = 0, i;
4304         CallInfo *cinfo;
4305         size_data sz;
4306
4307         cinfo = calculate_sizes (sig, &sz, sig->pinvoke);
4308
4309         if (cinfo->struct_ret) {
4310                 ArgInfo *ainfo = &cinfo->ret;
4311                 inst         = cfg->ret;
4312                 s390_lg (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4313         }
4314
4315         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
4316                 ArgInfo *ainfo = cinfo->args + i;
4317                 inst = cfg->args [pos];
4318
4319                 if (inst->opcode == OP_REGVAR) {
4320                         if (ainfo->regtype == RegTypeGeneral)
4321                                 s390_lgr (code, ainfo->reg, inst->dreg);
4322                         else if (ainfo->regtype == RegTypeFP) {
4323                                 if (inst->dreg != ainfo->reg) {
4324                                         if (ainfo->size == 4) {
4325                                                 s390_ldebr (code, ainfo->reg, inst->dreg);
4326                                         } else {
4327                                                 s390_ldr   (code, ainfo->reg, inst->dreg);
4328                                         }
4329                                 }
4330                         }
4331                         else if (ainfo->regtype == RegTypeBase) {
4332                         } else
4333                                 g_assert_not_reached ();
4334                 } else {
4335                         if (ainfo->regtype == RegTypeGeneral) {
4336                                 if (!((ainfo->reg >= 2) && (ainfo->reg <= 6)))
4337                                         g_assert_not_reached();
4338                                 switch (ainfo->size) {
4339                                 case 1:
4340                                         s390_llgc (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4341                                         break;
4342                                 case 2:
4343                                         s390_lgh  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4344                                         break;
4345                                 case 4:
4346                                         s390_lgf (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4347                                         break;
4348                                 case 8:
4349                                         s390_lg  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4350                                         break;
4351                                 }
4352                         } else if (ainfo->regtype == RegTypeBase) {
4353                         } else if (ainfo->regtype == RegTypeFP) {
4354                                 if (ainfo->size == 8)
4355                                         s390_ld  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4356                                 else if (ainfo->size == 4)
4357                                         s390_le  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4358                                 else
4359                                         g_assert_not_reached ();
4360                         } else if (ainfo->regtype == RegTypeStructByVal) {
4361                                 if (ainfo->reg != STK_BASE) {
4362                                         switch (ainfo->size) {
4363                                         case 1:
4364                                                 s390_llgc (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4365                                                 break;
4366                                         case 2:
4367                                                 s390_lgh (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4368                                                 break;
4369                                         case 4:
4370                                                 s390_lgf (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4371                                                 break;
4372                                         case 8:
4373                                                 s390_lg  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4374                                                 break;
4375                                         }
4376                                 }
4377                         } else if (ainfo->regtype == RegTypeStructByAddr) {
4378                                 if (ainfo->reg != STK_BASE) {
4379                                         s390_lg (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4380                                 }
4381                         } else
4382                                 g_assert_not_reached ();
4383                 }
4384                 pos++;
4385         }
4386
4387         g_free (cinfo);
4388
4389         return code;
4390 }
4391
4392 /*========================= End of Function ========================*/
4393
4394 /*------------------------------------------------------------------*/
4395 /*                                                                  */
4396 /* Name         - mono_arch_emit_prolog                             */
4397 /*                                                                  */
4398 /* Function     - Create the instruction sequence for a function    */
4399 /*                prolog.                                           */
4400 /*                                                                  */
4401 /*------------------------------------------------------------------*/
4402
4403 guint8 *
4404 mono_arch_emit_prolog (MonoCompile *cfg)
4405 {
4406         MonoMethod *method = cfg->method;
4407         MonoBasicBlock *bb;
4408         MonoMethodSignature *sig;
4409         MonoInst *inst;
4410         int alloc_size, pos, max_offset, i;
4411         guint8 *code;
4412         CallInfo *cinfo;
4413         size_data sz;
4414         int tracing = 0;
4415         int lmfOffset;
4416
4417         cfg->code_size   = 512;
4418
4419         if (mono_jit_trace_calls != NULL && mono_trace_eval (method)) {
4420                 tracing         = 1;
4421                 cfg->code_size += 256;
4422         }
4423
4424         if (method->save_lmf)
4425                 cfg->code_size += 200;
4426
4427         cfg->native_code = code = g_malloc (cfg->code_size);
4428
4429         s390_stmg (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
4430
4431         if (cfg->flags & MONO_CFG_HAS_ALLOCA) {
4432                 cfg->used_int_regs |= 1 << 11;
4433         }
4434
4435         alloc_size = cfg->stack_offset;
4436
4437         cfg->stack_usage = alloc_size;
4438         s390_lgr  (code, s390_r11, STK_BASE);
4439         if (s390_is_uimm16 (alloc_size)) {
4440                 s390_aghi (code, STK_BASE, -alloc_size);
4441         } else {
4442                 int stackSize = alloc_size;
4443                 while (stackSize > 32767) {
4444                         s390_aghi (code, STK_BASE, -32767);
4445                         stackSize -= 32767;
4446                 }
4447                 s390_aghi (code, STK_BASE, -stackSize);
4448         }
4449         s390_stg  (code, s390_r11, 0, STK_BASE, 0);
4450
4451         if (cfg->frame_reg != STK_BASE)
4452                 s390_lgr (code, s390_r11, STK_BASE);
4453
4454         /* compute max_offset in order to use short forward jumps
4455          * we always do it on s390 because the immediate displacement
4456          * for jumps is too small
4457          */
4458         max_offset = 0;
4459         for (bb = cfg->bb_entry; bb; bb = bb->next_bb) {
4460                 MonoInst *ins;
4461                 bb->max_offset = max_offset;
4462
4463                 if (cfg->prof_options & MONO_PROFILE_COVERAGE)
4464                         max_offset += 6;
4465
4466                 MONO_BB_FOR_EACH_INS (bb, ins)
4467                         max_offset += ((guint8 *)ins_get_spec (ins->opcode))[MONO_INST_LEN];
4468         }
4469
4470         /* load arguments allocated to register from the stack */
4471         sig = mono_method_signature (method);
4472         pos = 0;
4473
4474         cinfo = calculate_sizes (sig, &sz, sig->pinvoke);
4475
4476         if (cinfo->struct_ret) {
4477                 ArgInfo *ainfo = &cinfo->ret;
4478                 inst         = cfg->ret;
4479                 inst->backend.size = ainfo->vtsize;
4480                 s390_stg (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4481         }
4482
4483         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
4484                 ArgInfo *ainfo = cinfo->args + i;
4485                 inst = cfg->args [pos];
4486
4487                 if (inst->opcode == OP_REGVAR) {
4488                         if (ainfo->regtype == RegTypeGeneral)
4489                                 s390_lgr (code, inst->dreg, ainfo->reg);
4490                         else if (ainfo->regtype == RegTypeFP) {
4491                                 if (inst->dreg != ainfo->reg) {
4492                                         if (ainfo->size == 4) {
4493                                                 s390_ledbr (code, inst->dreg, ainfo->reg);
4494                                         } else {
4495                                                 s390_ldr   (code, inst->dreg, ainfo->reg);
4496                                         }
4497                                 }
4498                         }
4499                         else if (ainfo->regtype == RegTypeBase) {
4500                                 s390_lgr  (code, s390_r13, STK_BASE);
4501                                 s390_aghi (code, s390_r13, alloc_size);
4502                                 s390_lg   (code, inst->dreg, 0, s390_r13, ainfo->offset);
4503                         } else
4504                                 g_assert_not_reached ();
4505
4506                         if (cfg->verbose_level > 2)
4507                                 g_print ("Argument %d assigned to register %s\n",
4508                                          pos, mono_arch_regname (inst->dreg));
4509                 } else {
4510                         if (ainfo->regtype == RegTypeGeneral) {
4511                                 if (!((ainfo->reg >= 2) && (ainfo->reg <= 6)))
4512                                         g_assert_not_reached();
4513                                 switch (ainfo->size) {
4514                                 case 1:
4515                                         s390_stc (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4516                                         break;
4517                                 case 2:
4518                                         s390_sth (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4519                                         break;
4520                                 case 4:
4521                                         s390_st (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4522                                         break;
4523                                 case 8:
4524                                         s390_stg (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4525                                         break;
4526                                 }
4527                         } else if (ainfo->regtype == RegTypeBase) {
4528                         } else if (ainfo->regtype == RegTypeFP) {
4529                                 if (ainfo->size == 8)
4530                                         s390_std (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4531                                 else if (ainfo->size == 4)
4532                                         s390_ste (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4533                                 else
4534                                         g_assert_not_reached ();
4535                         } else if (ainfo->regtype == RegTypeStructByVal) {
4536                                 int doffset = inst->inst_offset;
4537                                 int reg;
4538                                 if (ainfo->reg != STK_BASE)
4539                                         reg = ainfo->reg;
4540                                 else {
4541                                         reg = s390_r0;
4542                                         s390_lgr  (code, s390_r13, STK_BASE);
4543                                         s390_aghi (code, s390_r13, alloc_size);
4544                                 }
4545                                 switch (ainfo->size) {
4546                                         case 1:
4547                                                 if (ainfo->reg == STK_BASE)
4548                                                         s390_ic (code, reg, 0, s390_r13, ainfo->offset+7);
4549                                                 s390_stc (code, reg, 0, inst->inst_basereg, doffset);
4550                                                 break;
4551                                         case 2:
4552                                                 if (ainfo->reg == STK_BASE)
4553                                                         s390_lh (code, reg, 0, s390_r13, ainfo->offset+6);
4554                                                 s390_sth (code, reg, 0, inst->inst_basereg, doffset);
4555                                                 break;
4556                                         case 4:
4557                                                 if (ainfo->reg == STK_BASE)
4558                                                         s390_l  (code, reg, 0, s390_r13, ainfo->offset+4);
4559                                                 s390_st (code, reg, 0, inst->inst_basereg, doffset);
4560                                                 break;
4561                                         case 8:
4562                                                 if (ainfo->reg == STK_BASE)
4563                                                         s390_lg  (code, reg, 0, s390_r13, ainfo->offset);
4564                                                 s390_stg (code, reg, 0, inst->inst_basereg, doffset);
4565                                                 break;
4566                                 }
4567                         } else if (ainfo->regtype == RegTypeStructByAddr) {
4568                                 s390_stg (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4569                         } else
4570                                 g_assert_not_reached ();
4571                 }
4572                 pos++;
4573         }
4574
4575         if (method->save_lmf) {
4576                 /*---------------------------------------------------------------*/
4577                 /* we build the MonoLMF structure on the stack - see mini-s390.h */
4578                 /*---------------------------------------------------------------*/
4579                 lmfOffset = alloc_size - sizeof(MonoLMF);
4580
4581                 s390_lgr   (code, s390_r13, cfg->frame_reg);
4582                 s390_aghi  (code, s390_r13, lmfOffset);
4583
4584                 /*---------------------------------------------------------------*/
4585                 /* Preserve the parameter registers while we fix up the lmf      */
4586                 /*---------------------------------------------------------------*/
4587                 s390_stmg  (code, s390_r2, s390_r6, s390_r13,
4588                             G_STRUCT_OFFSET(MonoLMF, pregs[0]));
4589
4590                 /*---------------------------------------------------------------*/
4591                 /* On return from this call r2 have the address of the &lmf      */
4592                 /*---------------------------------------------------------------*/
4593                 s390_basr(code, s390_r10, 0);
4594                 s390_j   (code, 6);
4595                 mono_add_patch_info (cfg, code - cfg->native_code,
4596                                      MONO_PATCH_INFO_INTERNAL_METHOD,
4597                                      (gpointer)"mono_get_lmf_addr");
4598                 s390_llong(code, 0);
4599                 s390_lg   (code, s390_r1, 0, s390_r10, 4);
4600                 s390_basr (code, s390_r14, s390_r1);
4601
4602                 /*---------------------------------------------------------------*/
4603                 /* Set lmf.lmf_addr = jit_tls->lmf                               */
4604                 /*---------------------------------------------------------------*/
4605                 s390_stg   (code, s390_r2, 0, s390_r13,
4606                             G_STRUCT_OFFSET(MonoLMF, lmf_addr));
4607
4608                 /*---------------------------------------------------------------*/
4609                 /* Get current lmf                                               */
4610                 /*---------------------------------------------------------------*/
4611                 s390_lg    (code, s390_r0, 0, s390_r2, 0);
4612
4613                 /*---------------------------------------------------------------*/
4614                 /* Set our lmf as the current lmf                                */
4615                 /*---------------------------------------------------------------*/
4616                 s390_stg   (code, s390_r13, 0, s390_r2, 0);
4617
4618                 /*---------------------------------------------------------------*/
4619                 /* Have our lmf.previous_lmf point to the last lmf               */
4620                 /*---------------------------------------------------------------*/
4621                 s390_stg   (code, s390_r0, 0, s390_r13,
4622                             G_STRUCT_OFFSET(MonoLMF, previous_lmf));
4623
4624                 /*---------------------------------------------------------------*/
4625                 /* save method info                                              */
4626                 /*---------------------------------------------------------------*/
4627                 s390_basr  (code, s390_r1, 0);
4628                 s390_j     (code, 6);
4629                 s390_llong (code, method);
4630                 s390_lg    (code, s390_r1, 0, s390_r1, 4);
4631                 s390_stg   (code, s390_r1, 0, s390_r13,
4632                             G_STRUCT_OFFSET(MonoLMF, method));
4633
4634                 /*---------------------------------------------------------------*/
4635                 /* save the current IP                                           */
4636                 /*---------------------------------------------------------------*/
4637                 s390_stg   (code, STK_BASE, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, ebp));
4638                 s390_basr  (code, s390_r1, 0);
4639                 s390_stg   (code, s390_r1, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, eip));
4640
4641                 /*---------------------------------------------------------------*/
4642                 /* Save general and floating point registers                     */
4643                 /*---------------------------------------------------------------*/
4644                 s390_stmg  (code, s390_r2, s390_r12, s390_r13,
4645                             G_STRUCT_OFFSET(MonoLMF, gregs[2]));
4646                 for (i = 0; i < 16; i++) {
4647                         s390_std  (code, i, 0, s390_r13,
4648                                    G_STRUCT_OFFSET(MonoLMF, fregs[i]));
4649                 }
4650
4651                 /*---------------------------------------------------------------*/
4652                 /* Restore the parameter registers now that we've set up the lmf */
4653                 /*---------------------------------------------------------------*/
4654                 s390_lmg   (code, s390_r2, s390_r6, s390_r13,
4655                             G_STRUCT_OFFSET(MonoLMF, pregs[0]));
4656         }
4657
4658         if (tracing)
4659                 code = mono_arch_instrument_prolog(cfg, enter_method, code, TRUE);
4660
4661         cfg->code_len = code - cfg->native_code;
4662         g_assert (cfg->code_len < cfg->code_size);
4663
4664         g_free (cinfo);
4665
4666         return code;
4667 }
4668
4669 /*========================= End of Function ========================*/
4670
4671 /*------------------------------------------------------------------*/
4672 /*                                                                  */
4673 /* Name         - mono_arch_emit_epilog                             */
4674 /*                                                                  */
4675 /* Function     - Emit the instructions for a function epilog.      */
4676 /*                                                                  */
4677 /*------------------------------------------------------------------*/
4678
4679 void
4680 mono_arch_emit_epilog (MonoCompile *cfg)
4681 {
4682         MonoMethod *method = cfg->method;
4683         int tracing = 0;
4684         guint8 *code;
4685         int max_epilog_size = 96;
4686
4687         if (cfg->method->save_lmf)
4688                 max_epilog_size += 128;
4689
4690         if (mono_jit_trace_calls != NULL)
4691                 max_epilog_size += 128;
4692
4693         if (cfg->prof_options & MONO_PROFILE_ENTER_LEAVE)
4694                 max_epilog_size += 128;
4695
4696         while ((cfg->code_len + max_epilog_size) > (cfg->code_size - 16)) {
4697                 cfg->code_size  *= 2;
4698                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
4699                 mono_jit_stats.code_reallocs++;
4700         }
4701
4702         code = cfg->native_code + cfg->code_len;
4703
4704         if (mono_jit_trace_calls != NULL && mono_trace_eval (method)) {
4705                 code = mono_arch_instrument_epilog (cfg, leave_method, code, TRUE);
4706                 tracing = 1;
4707         }
4708
4709         if (method->save_lmf)
4710                 restoreLMF(code, cfg->frame_reg, cfg->stack_usage);
4711
4712         if (cfg->flags & MONO_CFG_HAS_ALLOCA)
4713                 s390_lg  (code, STK_BASE, 0, STK_BASE, 0);
4714         else
4715                 code = backUpStackPtr(cfg, code);
4716
4717         s390_lmg (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
4718         s390_br  (code, s390_r14);
4719
4720         cfg->code_len = code - cfg->native_code;
4721
4722         g_assert (cfg->code_len < cfg->code_size);
4723
4724 }
4725
4726 /*========================= End of Function ========================*/
4727
4728 /*------------------------------------------------------------------*/
4729 /*                                                                  */
4730 /* Name         - mono_arch_emit_exceptions                         */
4731 /*                                                                  */
4732 /* Function     - Emit the blocks to handle exception conditions.   */
4733 /*                                                                  */
4734 /*------------------------------------------------------------------*/
4735
4736 void
4737 mono_arch_emit_exceptions (MonoCompile *cfg)
4738 {
4739         MonoJumpInfo    *patch_info;
4740         guint8          *code;
4741         int             nThrows = 0,
4742                         exc_count = 0,
4743                         iExc;
4744         guint32         code_size;
4745         MonoClass       *exc_classes [MAX_EXC];
4746         guint8          *exc_throw_start [MAX_EXC];
4747
4748         for (patch_info = cfg->patch_info;
4749              patch_info;
4750              patch_info = patch_info->next) {
4751                 if (patch_info->type == MONO_PATCH_INFO_EXC)
4752                         exc_count++;
4753         }
4754
4755         code_size = exc_count * 48;
4756
4757         while ((cfg->code_len + code_size) > (cfg->code_size - 16)) {
4758                 cfg->code_size  *= 2;
4759                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
4760                 mono_jit_stats.code_reallocs++;
4761         }
4762
4763         code = cfg->native_code + cfg->code_len;
4764
4765         /*---------------------------------------------------------------------*/
4766         /* Add code to raise exceptions                                        */
4767         /*---------------------------------------------------------------------*/
4768         for (patch_info = cfg->patch_info; patch_info; patch_info = patch_info->next) {
4769                 switch (patch_info->type) {
4770                 case MONO_PATCH_INFO_EXC: {
4771                         guint8 *ip = patch_info->ip.i + cfg->native_code;
4772                         MonoClass *exc_class;
4773                         guint64 throw_ip;
4774
4775                         /*-----------------------------------------------------*/
4776                         /* Patch the branch in epilog to come here             */
4777                         /*-----------------------------------------------------*/
4778                         s390_patch_rel (ip + 2, (guint64) S390_RELATIVE(code,ip));
4779
4780                         exc_class = mono_class_from_name (mono_defaults.corlib,
4781                                                           "System",
4782                                                           patch_info->data.name);
4783                         g_assert (exc_class);
4784                         throw_ip = patch_info->ip.i;
4785
4786                         for (iExc = 0; iExc < nThrows; ++iExc)
4787                                 if (exc_classes [iExc] == exc_class)
4788                                         break;
4789
4790                         if (iExc < nThrows) {
4791                                 s390_jcl (code, S390_CC_UN,
4792                                           (guint64) exc_throw_start [iExc]);
4793                                 patch_info->type = MONO_PATCH_INFO_NONE;
4794                         } else {
4795
4796                                 if (nThrows < MAX_EXC) {
4797                                         exc_classes [nThrows]     = exc_class;
4798                                         exc_throw_start [nThrows] = code;
4799                                 }
4800
4801                                 /*---------------------------------------------*/
4802                                 /* Patch the parameter passed to the handler   */
4803                                 /*---------------------------------------------*/
4804                                 s390_basr (code, s390_r13, 0);
4805                                 s390_j    (code, 6);
4806                                 s390_llong(code, patch_info->data.target);
4807                                 /*---------------------------------------------*/
4808                                 /* Load return address & parameter register    */
4809                                 /*---------------------------------------------*/
4810                                 s390_larl (code, s390_r14, S390_RELATIVE((patch_info->ip.i +
4811                                                            cfg->native_code + 8), code));
4812                                 s390_lg   (code, s390_r2, 0, s390_r13, 4);
4813                                 /*---------------------------------------------*/
4814                                 /* Reuse the current patch to set the jump     */
4815                                 /*---------------------------------------------*/
4816                                 s390_basr (code, s390_r13, 0);
4817                                 s390_j    (code, 6);
4818                                 patch_info->type      = MONO_PATCH_INFO_INTERNAL_METHOD;
4819                                 patch_info->data.name = "mono_arch_throw_exception_by_name";
4820                                 patch_info->ip.i      = code - cfg->native_code;
4821                                 s390_llong(code, 0);
4822                                 s390_lg   (code, s390_r1, 0, s390_r13, 4);
4823                                 s390_br   (code, s390_r1);
4824                         }
4825                         break;
4826                 }
4827                 default:
4828                         /* do nothing */
4829                         break;
4830                 }
4831         }
4832
4833         cfg->code_len = code - cfg->native_code;
4834
4835         g_assert (cfg->code_len < cfg->code_size);
4836
4837 }
4838
4839 /*========================= End of Function ========================*/
4840
4841 /*------------------------------------------------------------------*/
4842 /*                                                                  */
4843 /* Name         - mono_arch_setup_jit_tls_data                      */
4844 /*                                                                  */
4845 /* Function     - Setup the JIT's Thread Level Specific Data.       */
4846 /*                                                                  */
4847 /*------------------------------------------------------------------*/
4848
4849 void
4850 mono_arch_setup_jit_tls_data (MonoJitTlsData *tls)
4851 {
4852         if (!tls_offset_inited) {
4853                 tls_offset_inited = TRUE;
4854
4855 #if HAVE_KW_THREAD
4856 # if 0
4857         __asm__ ("\tear\t%r1,0\n"
4858                  "\tlr\t%0,%3\n"
4859                  "\tsr\t%0,%r1\n"
4860                  "\tlr\t%1,%4\n"
4861                  "\tsr\t%1,%r1\n"
4862                  "\tlr\t%2,%5\n"
4863                  "\tsr\t%2,%r1\n"
4864                  : "=r" (appdomain_tls_offset),
4865                    "=r" (thread_tls_offset),
4866                    "=r" (lmf_tls_offset)
4867                  : "r" (&tls_appdomain),
4868                    "r" (&tls_current_object),
4869                    "r" (&mono_lmf_addr)
4870                  : "1", "cc");
4871 # endif
4872 #endif
4873         }
4874
4875         if (!lmf_addr_key_inited) {
4876                 lmf_addr_key_inited = TRUE;
4877                 pthread_key_create (&lmf_addr_key, NULL);
4878         }
4879         pthread_setspecific (lmf_addr_key, &tls->lmf);
4880
4881 }
4882
4883 /*========================= End of Function ========================*/
4884
4885 /*------------------------------------------------------------------*/
4886 /*                                                                  */
4887 /* Name         - mono_arch_free_jit_tls_data                       */
4888 /*                                                                  */
4889 /* Function     - Free tls data.                                    */
4890 /*                                                                  */
4891 /*------------------------------------------------------------------*/
4892
4893 void
4894 mono_arch_free_jit_tls_data (MonoJitTlsData *tls)
4895 {
4896
4897 }
4898
4899 /*========================= End of Function ========================*/
4900
4901 /*------------------------------------------------------------------*/
4902 /*                                                                  */
4903 /* Name         - mono_arch_emit_this_vret_args                     */
4904 /*                                                                  */
4905 /* Function     -                                                   */
4906 /*                                                                  */
4907 /*------------------------------------------------------------------*/
4908
4909 void
4910 mono_arch_emit_this_vret_args (MonoCompile *cfg, MonoCallInst *inst, int this_reg, int this_type, int vt_reg)
4911 {
4912         int this_dreg = s390_r2;
4913
4914         if (vt_reg != -1)
4915                 this_dreg = s390_r3;
4916
4917         /* add the this argument */
4918         if (this_reg != -1) {
4919                 MonoInst *this;
4920                 MONO_INST_NEW (cfg, this, OP_SETREG);
4921                 this->type  = this_type;
4922                 this->sreg1 = this_reg;
4923                 this->dreg  = mono_regstate_next_int (cfg->rs);
4924                 mono_bblock_add_inst (cfg->cbb, this);
4925                 mono_call_inst_add_outarg_reg (cfg, inst, this->dreg, this_dreg, FALSE);
4926         }
4927
4928         if (vt_reg != -1) {
4929                 MonoInst *vtarg;
4930                 MONO_INST_NEW (cfg, vtarg, OP_SETREG);
4931                 vtarg->type  = STACK_MP;
4932                 vtarg->sreg1 = vt_reg;
4933                 vtarg->dreg  = mono_regstate_next_int (cfg->rs);
4934                 mono_bblock_add_inst (cfg->cbb, vtarg);
4935                 mono_call_inst_add_outarg_reg (cfg, inst, vtarg->dreg, s390_r2, FALSE);
4936         }
4937 }
4938
4939 /*========================= End of Function ========================*/
4940
4941 /*------------------------------------------------------------------*/
4942 /*                                                                  */
4943 /* Name         - mono_arch_get_inst_for_method                   */
4944 /*                                                                  */
4945 /* Function     - Check for opcodes we can handle directly in       */
4946 /*                hardware.                                         */
4947 /*                                                                  */
4948 /*------------------------------------------------------------------*/
4949
4950 MonoInst*
4951 mono_arch_get_inst_for_method (MonoCompile *cfg, MonoMethod *cmethod,
4952                                MonoMethodSignature *fsig, MonoInst **args)
4953 {
4954         MonoInst *ins = NULL;
4955
4956         if (cmethod->klass == mono_defaults.math_class) {
4957                 if (strcmp (cmethod->name, "Sqrt") == 0) {
4958                         MONO_INST_NEW (cfg, ins, OP_SQRT);
4959                         ins->inst_i0 = args [0];
4960                 }
4961 //              if (strcmp (cmethod->name, "Abs") == 0) {
4962 //                      MONO_INST_NEW (cfg, ins, OP_ABS);
4963 //                      ins->inst_i0 = args [0];
4964 //              }
4965         } else if (cmethod->klass == mono_defaults.thread_class &&
4966                            strcmp (cmethod->name, "MemoryBarrier") == 0) {
4967                 MONO_INST_NEW (cfg, ins, OP_MEMORY_BARRIER);
4968         } else if(cmethod->klass->image == mono_defaults.corlib &&
4969                            (strcmp (cmethod->klass->name_space, "System.Threading") == 0) &&
4970                            (strcmp (cmethod->klass->name, "Interlocked") == 0)) {
4971
4972                 if (strcmp (cmethod->name, "Increment") == 0) {
4973                         MonoInst *ins_iconst;
4974                         guint32 opcode = 0;
4975
4976                         if (fsig->params [0]->type == MONO_TYPE_I4)
4977                                 opcode = OP_ATOMIC_ADD_NEW_I4;
4978                         else if (fsig->params [0]->type == MONO_TYPE_I8)
4979                                 opcode = OP_ATOMIC_ADD_NEW_I8;
4980                         else
4981                                 g_assert_not_reached ();
4982
4983                         MONO_INST_NEW (cfg, ins, opcode);
4984                         MONO_INST_NEW (cfg, ins_iconst, OP_ICONST);
4985                         ins_iconst->inst_c0 = 1;
4986
4987                         ins->inst_i0 = args [0];
4988                         ins->inst_i1 = ins_iconst;
4989                 } else if (strcmp (cmethod->name, "Decrement") == 0) {
4990                         MonoInst *ins_iconst;
4991                         guint32 opcode = 0;
4992
4993                         if (fsig->params [0]->type == MONO_TYPE_I4)
4994                                 opcode = OP_ATOMIC_ADD_NEW_I4;
4995                         else if (fsig->params [0]->type == MONO_TYPE_I8)
4996                                 opcode = OP_ATOMIC_ADD_NEW_I8;
4997                         else
4998                                 g_assert_not_reached ();
4999                         MONO_INST_NEW (cfg, ins, opcode);
5000                         MONO_INST_NEW (cfg, ins_iconst, OP_ICONST);
5001                         ins_iconst->inst_c0 = -1;
5002
5003                         ins->inst_i0 = args [0];
5004                         ins->inst_i1 = ins_iconst;
5005                         /* FIXME: */
5006                 } else if (strcmp (cmethod->name, "Exchange") == 0) {
5007                         guint32 opcode = 0;
5008
5009                         if (fsig->params [0]->type == MONO_TYPE_I4)
5010                                 opcode = OP_ATOMIC_EXCHANGE_I4;
5011                         else if ((fsig->params [0]->type == MONO_TYPE_I8) ||
5012                                          (fsig->params [0]->type == MONO_TYPE_I) ||
5013                                          (fsig->params [0]->type == MONO_TYPE_OBJECT))
5014                                 opcode = OP_ATOMIC_EXCHANGE_I8;
5015                         else
5016                                 return NULL;
5017
5018                         MONO_INST_NEW (cfg, ins, opcode);
5019
5020                         ins->inst_i0 = args [0];
5021                         ins->inst_i1 = args [1];
5022                 } else if (strcmp (cmethod->name, "Add") == 0) {
5023                         guint32 opcode = 0;
5024
5025                         if (fsig->params [0]->type == MONO_TYPE_I4)
5026                                 opcode = OP_ATOMIC_ADD_I4;
5027                         else if (fsig->params [0]->type == MONO_TYPE_I8)
5028                                 opcode = OP_ATOMIC_ADD_I8;
5029                         else
5030                                 g_assert_not_reached ();
5031
5032                         MONO_INST_NEW (cfg, ins, opcode);
5033
5034                         ins->inst_i0 = args [0];
5035                         ins->inst_i1 = args [1];
5036                 } else if ((strcmp (cmethod->name, "Read") == 0 &&
5037                            (fsig->params [0]->type == MONO_TYPE_I8))) {
5038                         MONO_INST_NEW (cfg, ins, CEE_LDIND_I8);
5039                         ins->inst_i0 = args [0];
5040                 }
5041         }
5042         return ins;
5043 }
5044
5045 /*========================= End of Function ========================*/
5046
5047 /*------------------------------------------------------------------*/
5048 /*                                                                  */
5049 /* Name         - mono_arch_print_tree                              */
5050 /*                                                                  */
5051 /* Function     - Print platform-specific opcode details.           */
5052 /*                                                                  */
5053 /* Returns      - 1 - opcode details have been printed              */
5054 /*                0 - opcode details have not been printed          */
5055 /*                                                                  */
5056 /*------------------------------------------------------------------*/
5057
5058 gboolean
5059 mono_arch_print_tree (MonoInst *tree, int arity)
5060 {
5061         gboolean done;
5062
5063         switch (tree->opcode) {
5064                 case OP_S390_LOADARG:
5065                 case OP_S390_ARGREG:
5066                 case OP_S390_ARGPTR:
5067                         printf ("[0x%lx(%s)]", tree->inst_offset,
5068                                 mono_arch_regname (tree->inst_basereg));
5069                         done = 1;
5070                         break;
5071                 case OP_S390_STKARG:
5072                         printf ("[0x%lx(previous_frame)]",
5073                                 tree->inst_offset);
5074                         done = 1;
5075                         break;
5076                 case OP_S390_MOVE:
5077                         printf ("[0x%lx(%d,%s),0x%lx(%s)]",
5078                                 tree->inst_offset, tree->backend.size,
5079                                 mono_arch_regname(tree->dreg),
5080                                 tree->inst_imm,
5081                                 mono_arch_regname(tree->sreg1));
5082                         done = 1;
5083                         break;
5084                 case OP_S390_SETF4RET:
5085                         printf ("[f%s,f%s]",
5086                                 mono_arch_regname (tree->dreg),
5087                                 mono_arch_regname (tree->sreg1));
5088                         done = 1;
5089                         break;
5090                 case OP_TLS_GET:
5091                         printf ("[0x%lx(0x%lx,%s)]", tree->inst_offset,
5092                                 tree->inst_imm,
5093                                 mono_arch_regname (tree->sreg1));
5094                         done = 1;
5095                         break;
5096                 case OP_S390_BKCHAIN:
5097                         printf ("[previous_frame(%s)]",
5098                                 mono_arch_regname (tree->sreg1));
5099                         done = 1;
5100                 default:
5101                         done = 0;
5102         }
5103         return (done);
5104 }
5105
5106 /*========================= End of Function ========================*/
5107
5108 /*------------------------------------------------------------------*/
5109 /*                                                                  */
5110 /* Name         - mono_arch_regalloc_cost                           */
5111 /*                                                                  */
5112 /* Function     - Determine the cost, in the number of memory       */
5113 /*                references, of the action of allocating the var-  */
5114 /*                iable VMV into a register during global register  */
5115 /*                allocation.                                       */
5116 /*                                                                  */
5117 /* Returns      - Cost                                              */
5118 /*                                                                  */
5119 /*------------------------------------------------------------------*/
5120
5121 guint32
5122 mono_arch_regalloc_cost (MonoCompile *cfg, MonoMethodVar *vmv)
5123 {
5124         /* FIXME: */
5125         return 2;
5126 }
5127
5128 /*========================= End of Function ========================*/
5129
5130 /*------------------------------------------------------------------*/
5131 /*                                                                  */
5132 /* Name         - mono_arch_get_domain_intrinsic                    */
5133 /*                                                                  */
5134 /* Function     -                                                   */
5135 /*                                                                  */
5136 /* Returns      -                                                   */
5137 /*                                                                  */
5138 /*------------------------------------------------------------------*/
5139
5140 MonoInst *
5141 mono_arch_get_domain_intrinsic (MonoCompile* cfg)
5142 {
5143         MonoInst *ins;
5144
5145         if (appdomain_tls_offset == -1)
5146                 return NULL;
5147
5148         MONO_INST_NEW (cfg, ins, OP_TLS_GET);
5149         ins->inst_offset = appdomain_tls_offset;
5150         return (ins);
5151 }
5152
5153 /*========================= End of Function ========================*/
5154
5155 /*------------------------------------------------------------------*/
5156 /*                                                                  */
5157 /* Name         - mono_arch_get_thread_intrinsic                    */
5158 /*                                                                  */
5159 /* Function     -                                                   */
5160 /*                                                                  */
5161 /* Returns      -                                                   */
5162 /*                                                                  */
5163 /*------------------------------------------------------------------*/
5164
5165 MonoInst *
5166 mono_arch_get_thread_intrinsic (MonoCompile* cfg)
5167 {
5168         MonoInst *ins;
5169
5170         if (thread_tls_offset == -1)
5171                 return NULL;
5172
5173         MONO_INST_NEW (cfg, ins, OP_TLS_GET);
5174         ins->inst_offset = thread_tls_offset;
5175         return (ins);
5176 }
5177
5178 /*========================= End of Function ========================*/
5179
5180 /*------------------------------------------------------------------*/
5181 /*                                                                  */
5182 /* Name         - mono_arch_flush_register_windows                  */
5183 /*                                                                  */
5184 /* Function     -                                                   */
5185 /*                                                                  */
5186 /* Returns      -                                                   */
5187 /*                                                                  */
5188 /*------------------------------------------------------------------*/
5189
5190 void
5191 mono_arch_flush_register_windows (void)
5192 {
5193 }
5194
5195 /*========================= End of Function ========================*/
5196
5197 /*------------------------------------------------------------------*/
5198 /*                                                                  */
5199 /* Name         - mono_arch_get_lmf_addr                            */
5200 /*                                                                  */
5201 /* Function     -                                                   */
5202 /*                                                                  */
5203 /* Returns      -                                                   */
5204 /*                                                                  */
5205 /*------------------------------------------------------------------*/
5206
5207 gpointer
5208 mono_arch_get_lmf_addr (void)
5209 {
5210         return pthread_getspecific (lmf_addr_key);
5211 }
5212
5213 /*========================= End of Function ========================*/
5214
5215 /*------------------------------------------------------------------*/
5216 /*                                                                  */
5217 /* Name         - mono_arch_is_inst_imm                             */
5218 /*                                                                  */
5219 /* Function     - Determine if operand qualifies as an immediate    */
5220 /*                value. For s390 this is a value -32768-32768      */
5221 /*                                                                  */
5222 /* Returns      - True|False - is [not] immediate value.            */
5223 /*                                                                  */
5224 /*------------------------------------------------------------------*/
5225
5226 gboolean
5227 mono_arch_is_inst_imm (gint64 imm)
5228 {
5229         return s390_is_imm16 (imm);
5230 }
5231
5232 /*========================= End of Function ========================*/
5233
5234 /*------------------------------------------------------------------*/
5235 /*                                                                  */
5236 /* Name         - opcode_to_cond                                    */
5237 /*                                                                  */
5238 /* Function     - Simplify the branch on condition opcode from      */
5239 /*                more than 20 to just a handful for easy manipu-   */
5240 /*                lation within the instruction emitting code.      */
5241 /*                                                                  */
5242 /* Returns      - CMP_xxx - this simplified condition type.         */
5243 /*                                                                  */
5244 /*------------------------------------------------------------------*/
5245
5246 static CompRelation
5247 opcode_to_cond (int opcode)
5248 {
5249         switch (opcode) {
5250         case CEE_BEQ:
5251         case OP_CEQ:
5252         case OP_IBEQ:
5253         case OP_ICEQ:
5254         case OP_FBEQ:
5255         case OP_FCEQ:
5256         case OP_COND_EXC_EQ:
5257                 return CMP_EQ;
5258         case CEE_BNE_UN:
5259         case OP_COND_EXC_NE_UN:
5260         case OP_IBNE_UN:
5261         case OP_FBNE_UN:
5262                 return CMP_NE;
5263         case CEE_BLE:
5264         case OP_IBLE:
5265         case OP_FBLE:
5266                 return CMP_LE;
5267         case CEE_BGE:
5268         case OP_IBGE:
5269         case OP_FBGE:
5270                 return CMP_GE;
5271         case CEE_BLT:
5272         case OP_COND_EXC_LT:
5273         case OP_CLT:
5274         case OP_IBLT:
5275         case OP_ICLT:
5276         case OP_FBLT:
5277         case OP_FCLT:
5278                 return CMP_LT;
5279         case CEE_BGT:
5280         case OP_COND_EXC_GT:
5281         case OP_CGT:
5282         case OP_IBGT:
5283         case OP_ICGT:
5284         case OP_FBGT:
5285         case OP_FCGT:
5286                 return CMP_GT;
5287
5288         case CEE_BLE_UN:
5289         case OP_COND_EXC_LE_UN:
5290         case OP_IBLE_UN:
5291         case OP_FBLE_UN:
5292                 return CMP_LE_UN;
5293         case CEE_BGE_UN:
5294         case OP_IBGE_UN:
5295         case OP_FBGE_UN:
5296                 return CMP_GE_UN;
5297         case CEE_BLT_UN:
5298         case OP_CLT_UN:
5299         case OP_IBLT_UN:
5300         case OP_ICLT_UN:
5301         case OP_FBLT_UN:
5302         case OP_FCLT_UN:
5303         case OP_COND_EXC_LT_UN:
5304                 return CMP_LT_UN;
5305         case CEE_BGT_UN:
5306         case OP_COND_EXC_GT_UN:
5307         case OP_CGT_UN:
5308         case OP_IBGT_UN:
5309         case OP_ICGT_UN:
5310         case OP_FCGT_UN:
5311         case OP_FBGT_UN:
5312                 return CMP_GT_UN;
5313         default:
5314                 printf ("%s\n", mono_inst_name (opcode));
5315                 g_error("Not implemented\n");
5316         }
5317         return CMP_EQ;
5318 }
5319
5320 /*========================= End of Function ========================*/
5321
5322 /*------------------------------------------------------------------*/
5323 /*                                                                  */
5324 /* Name         - mono_arch_get_patch_offset                        */
5325 /*                                                                  */
5326 /* Function     - Dummy entry point until s390x supports aot.       */
5327 /*                                                                  */
5328 /* Returns      - Offset for patch.                                 */
5329 /*                                                                  */
5330 /*------------------------------------------------------------------*/
5331
5332 guint32
5333 mono_arch_get_patch_offset (guint8 *code)
5334 {
5335         return 0;
5336 }
5337
5338 /*========================= End of Function ========================*/