mono/mini/mini-s390.c

   1 /*------------------------------------------------------------------*/
   2 /*                                                                  */
   3 /* Name        - mini-s390.c                                        */
   4 /*                                                                  */
   5 /* Function    - S/390 backend for the Mono code generator.         */
   6 /*                                                                  */
   7 /* Name        - Neale Ferguson (Neale.Ferguson@SoftwareAG-usa.com) */
   8 /*                                                                  */
   9 /* Date        - January, 2004                                      */
  10 /*                                                                  */
  11 /* Derivation  - From mini-x86 & mini-ppc by -                      */
  12 /*               Paolo Molaro (lupus@ximian.com)                    */
  13 /*               Dietmar Maurer (dietmar@ximian.com)                */
  14 /*                                                                  */
  15 /*------------------------------------------------------------------*/
  16
  17 /*------------------------------------------------------------------*/
  18 /*                 D e f i n e s                                    */
  19 /*------------------------------------------------------------------*/
  20
  21 #define NOT_IMPLEMENTED(x) \
  22         g_error ("FIXME: %s is not yet implemented.", x);
  23
  24 #define EMIT_COND_BRANCH(ins,cond)                                                      \
  25 {                                                                                       \
  26 if (ins->flags & MONO_INST_BRLABEL) {                                                   \
  27         if (ins->inst_i0->inst_c0) {                                                    \
  28                 int displace;                                                           \
  29                 displace = ((cfg->native_code + ins->inst_i0->inst_c0) - code) / 2;     \
  30                 if (s390_is_imm16(displace)) {                                          \
  31                         s390_brc (code, cond, displace);                                \
  32                 } else {                                                                \
  33                         s390_jcl (code, cond, displace);                                \
  34                 }                                                                       \
  35         } else {                                                                        \
  36                 mono_add_patch_info (cfg, code - cfg->native_code,                      \
  37                                      MONO_PATCH_INFO_LABEL, ins->inst_i0);              \
  38                 s390_jcl (code, cond, 0);                                               \
  39         }                                                                               \
  40 } else {                                                                                \
  41         if (ins->inst_true_bb->native_offset) {                                         \
  42                 int displace;                                                           \
  43                 displace = ((cfg->native_code +                                         \
  44                             ins->inst_true_bb->native_offset) - code) / 2;              \
  45                 if (s390_is_imm16(displace)) {                                          \
  46                         s390_brc (code, cond, displace);                                \
  47                 } else {                                                                \
  48                         s390_jcl (code, cond, displace);                                \
  49                 }                                                                       \
  50         } else {                                                                        \
  51                 mono_add_patch_info (cfg, code - cfg->native_code,                      \
  52                                      MONO_PATCH_INFO_BB, ins->inst_true_bb);            \
  53                 s390_jcl (code, cond, 0);                                               \
  54         }                                                                               \
  55 }                                                                                       \
  56 }
  57
  58 #define EMIT_UNCOND_BRANCH(ins)                                                         \
  59 {                                                                                       \
  60 if (ins->flags & MONO_INST_BRLABEL) {                                                   \
  61         if (ins->inst_i0->inst_c0) {                                                    \
  62                 int displace;                                                           \
  63                 displace = ((cfg->native_code + ins->inst_i0->inst_c0) - code) / 2;     \
  64                 if (s390_is_imm16(displace)) {                                          \
  65                         s390_brc (code, S390_CC_UN, displace);                          \
  66                 } else {                                                                \
  67                         s390_jcl (code, S390_CC_UN, displace);                          \
  68                 }                                                                       \
  69         } else {                                                                        \
  70                 mono_add_patch_info (cfg, code - cfg->native_code,                      \
  71                                      MONO_PATCH_INFO_LABEL, ins->inst_i0);              \
  72                 s390_jcl (code, S390_CC_UN, 0);                                         \
  73         }                                                                               \
  74 } else {                                                                                \
  75         if (ins->inst_target_bb->native_offset) {                                       \
  76                 int displace;                                                           \
  77                 displace = ((cfg->native_code +                                         \
  78                             ins->inst_target_bb->native_offset) - code) / 2;            \
  79                 if (s390_is_imm16(displace)) {                                          \
  80                         s390_brc (code, S390_CC_UN, displace);                          \
  81                 } else {                                                                \
  82                         s390_jcl (code, S390_CC_UN, displace);                          \
  83                 }                                                                       \
  84         } else {                                                                        \
  85                 mono_add_patch_info (cfg, code - cfg->native_code,                      \
  86                                      MONO_PATCH_INFO_BB, ins->inst_target_bb);          \
  87                 s390_jcl (code, S390_CC_UN, 0);                                         \
  88         }                                                                               \
  89 }                                                                                       \
  90 }
  91
  92 #define EMIT_COND_SYSTEM_EXCEPTION(cond,exc_name)                       \
  93         do {                                                            \
  94                 mono_add_patch_info (cfg, code - cfg->native_code,      \
  95                                     MONO_PATCH_INFO_EXC, exc_name);     \
  96                 s390_jcl (code, cond, 0);                               \
  97         } while (0);
  98
  99 #define CHECK_SRCDST_COM                                                \
 100         if (ins->dreg == ins->sreg2) {                                  \
 101                 src2 = ins->sreg1;                                      \
 102         } else {                                                        \
 103                 src2 = ins->sreg2;                                      \
 104                 if (ins->dreg != ins->sreg1) {                          \
 105                         s390_lr  (code, ins->dreg, ins->sreg1);         \
 106                 }                                                       \
 107         }
 108
 109 #define CHECK_SRCDST_NCOM                                               \
 110         if (ins->dreg == ins->sreg2) {                                  \
 111                 src2 = s390_r13;                                        \
 112                 s390_lr  (code, s390_r13, ins->sreg2);                  \
 113         } else {                                                        \
 114                 src2 = ins->sreg2;                                      \
 115         }                                                               \
 116         if (ins->dreg != ins->sreg1) {                                  \
 117                 s390_lr  (code, ins->dreg, ins->sreg1);                 \
 118         }
 119
 120 #define CHECK_SRCDST_COM_F                                              \
 121         if (ins->dreg == ins->sreg2) {                                  \
 122                 src2 = ins->sreg1;                                      \
 123         } else {                                                        \
 124                 src2 = ins->sreg2;                                      \
 125                 if (ins->dreg != ins->sreg1) {                          \
 126                         s390_ldr (code, ins->dreg, ins->sreg1);         \
 127                 }                                                       \
 128         }
 129
 130 #define CHECK_SRCDST_NCOM_F                                             \
 131         if (ins->dreg == ins->sreg2) {                                  \
 132                 src2 = s390_f15;                                        \
 133                 s390_ldr (code, s390_r13, ins->sreg2);                  \
 134         } else {                                                        \
 135                 src2 = ins->sreg2;                                      \
 136         }                                                               \
 137         if (ins->dreg != ins->sreg1) {                                  \
 138                 s390_ldr (code, ins->dreg, ins->sreg1);                 \
 139         }
 140
 141 #undef DEBUG
 142 #define DEBUG(a) if (cfg->verbose_level > 1) a
 143
 144 #define MAX_EXC 16
 145
 146 #define S390_TRACE_STACK_SIZE (5*sizeof(gint32)+3*sizeof(gdouble))
 147
 148 #define MAX (a, b) ((a) > (b) ? (a) : (b))
 149
 150 /*========================= End of Defines =========================*/
 151
 152 /*------------------------------------------------------------------*/
 153 /*                 I n c l u d e s                                  */
 154 /*------------------------------------------------------------------*/
 155
 156 #include "mini.h"
 157 #include <string.h>
 158
 159 #include <mono/metadata/appdomain.h>
 160 #include <mono/metadata/debug-helpers.h>
 161 #include <mono/metadata/profiler-private.h>
 162 #include <mono/utils/mono-math.h>
 163
 164 #include "mini-s390.h"
 165 #include "inssel.h"
 166 #include "cpu-s390.h"
 167
 168 /*========================= End of Includes ========================*/
 169
 170 /*------------------------------------------------------------------*/
 171 /*                 T y p e d e f s                                  */
 172 /*------------------------------------------------------------------*/
 173
 174 typedef struct {
 175         guint stack_size,
 176               local_size,
 177               code_size,
 178               parm_size,
 179               retStruct;
 180 } size_data;
 181
 182 /*------------------------------------------------------------------*/
 183 /* Used by the instrument_emit_epilog                               */
 184 /*------------------------------------------------------------------*/
 185
 186 enum {
 187         SAVE_NONE,
 188         SAVE_STRUCT,
 189         SAVE_ONE,
 190         SAVE_TWO,
 191         SAVE_FP
 192 };
 193
 194 typedef struct InstList InstList;
 195
 196 struct InstList {
 197         InstList *prev;
 198         InstList *next;
 199         MonoInst *data;
 200 };
 201
 202 enum {
 203         RegTypeGeneral,
 204         RegTypeBase,
 205         RegTypeFP,
 206         RegTypeStructByVal,
 207         RegTypeStructByAddr
 208 };
 209
 210 typedef struct {
 211         gint32  offset;         /* offset from caller's stack */
 212         gint32  offparm;        /* offset from callee's stack */
 213         guint16 vtsize;         /* in param area */
 214         guint8  reg;
 215         guint8  regtype;        /* See RegType* */
 216         guint32 size;           /* Size of structure used by RegTypeStructByVal */
 217 } ArgInfo;
 218
 219 typedef struct {
 220         int nargs;
 221         guint32 stack_usage;
 222         guint32 struct_ret;
 223         guint32 offStruct;
 224         ArgInfo ret;
 225         ArgInfo sigCookie;
 226         ArgInfo args [1];
 227 } CallInfo;
 228
 229 typedef struct {
 230         gint32  gr[5];          /* R2-R6                            */
 231         gdouble fp[3];          /* F0-F2                            */
 232 } __attribute__ ((packed)) RegParm;
 233
 234 /*========================= End of Typedefs ========================*/
 235
 236 /*------------------------------------------------------------------*/
 237 /*                   P r o t o t y p e s                            */
 238 /*------------------------------------------------------------------*/
 239
 240 static guint8 * emit_memcpy (guint8 *, int, int, int, int, int);
 241 static void indent (int);
 242 static guint8 * backUpStackPtr(MonoCompile *, guint8 *, gint);
 243 static void decodeParm (MonoType *, void *, int);
 244 static void enter_method (MonoMethod *, RegParm *, char *);
 245 static void leave_method (MonoMethod *, ...);
 246 static gboolean is_regsize_var (MonoType *);
 247 static inline void add_general (guint *, size_data *, ArgInfo *, gboolean);
 248 static inline void add_stackParm (guint *, size_data *, ArgInfo *, gint);
 249 static inline void add_float (guint *, size_data *, ArgInfo *);
 250 static CallInfo * calculate_sizes (MonoMethodSignature *, size_data *, gboolean);
 251 static void peephole_pass (MonoCompile *, MonoBasicBlock *);
 252 static guchar * emit_float_to_int (MonoCompile *, guchar *, int, int, int, gboolean);
 253 static void mono_arch_break(void);
 254 gpointer mono_arch_get_lmf_addr (void);
 255 static guint8 * emit_load_volatile_registers(guint8 *, MonoCompile *);
 256
 257 /*========================= End of Prototypes ======================*/
 258
 259 /*------------------------------------------------------------------*/
 260 /*                 G l o b a l   V a r i a b l e s                  */
 261 /*------------------------------------------------------------------*/
 262
 263 int mono_exc_esp_offset = 0;
 264
 265 static int indent_level = 0;
 266
 267 static const char*const * ins_spec = s390_cpu_desc;
 268
 269 static gboolean tls_offset_inited = FALSE;
 270
 271 static int appdomain_tls_offset = -1,
 272            lmf_tls_offset = -1,
 273            thread_tls_offset = -1;
 274
 275 pthread_key_t lmf_addr_key;
 276
 277 gboolean lmf_addr_key_inited = FALSE;
 278
 279 #if 0
 280
 281 extern __thread MonoDomain *tls_appdomain;
 282 extern __thread MonoThread *tls_current_object;
 283 extern __thread gpointer   mono_lmf_addr;
 284
 285 #endif
 286
 287 /*====================== End of Global Variables ===================*/
 288
 289 /*------------------------------------------------------------------*/
 290 /*                                                                  */
 291 /* Name         - mono_arch_regname                                 */
 292 /*                                                                  */
 293 /* Function     - Returns the name of the register specified by     */
 294 /*                the input parameter.                              */
 295 /*                                                                  */
 296 /*------------------------------------------------------------------*/
 297
 298 const char*
 299 mono_arch_regname (int reg) {
 300         static const char * rnames[] = {
 301                 "s390_r0", "s390_sp", "s390_r2", "s390_r3", "s390_r4",
 302                 "s390_r5", "s390_r6", "s390_r7", "s390_r8", "s390_r9",
 303                 "s390_r10", "s390_r11", "s390_r12", "s390_r13", "s390_r14",
 304                 "s390_r15"
 305         };
 306
 307         if (reg >= 0 && reg < 16)
 308                 return rnames [reg];
 309         else
 310                 return "unknown";
 311 }
 312
 313 /*========================= End of Function ========================*/
 314
 315 /*------------------------------------------------------------------*/
 316 /*                                                                  */
 317 /* Name         - mono_arch_fregname                                */
 318 /*                                                                  */
 319 /* Function     - Returns the name of the register specified by     */
 320 /*                the input parameter.                              */
 321 /*                                                                  */
 322 /*------------------------------------------------------------------*/
 323
 324 const char*
 325 mono_arch_fregname (int reg) {
 326         static const char * rnames[] = {
 327                 "s390_f0", "s390_f1", "s390_f2", "s390_f3", "s390_f4",
 328                 "s390_f5", "s390_f6", "s390_f7", "s390_f8", "s390_f9",
 329                 "s390_f10", "s390_f11", "s390_f12", "s390_f13", "s390_f14",
 330                 "s390_f15"
 331         };
 332
 333         if (reg >= 0 && reg < 16)
 334                 return rnames [reg];
 335         else
 336                 return "unknown";
 337 }
 338
 339 /*========================= End of Function ========================*/
 340
 341 /*------------------------------------------------------------------*/
 342 /*                                                                  */
 343 /* Name         - emit_memcpy                                       */
 344 /*                                                                  */
 345 /* Function     - Emit code to move from memory-to-memory based on  */
 346 /*                the size of the variable. r0 is overwritten.      */
 347 /*                                                                  */
 348 /*------------------------------------------------------------------*/
 349
 350 static guint8 *
 351 emit_memcpy (guint8 *code, int size, int dreg, int doffset, int sreg, int soffset)
 352 {
 353         switch (size) {
 354                 case 4 :
 355                         s390_l  (code, s390_r0, 0, sreg, soffset);
 356                         s390_st (code, s390_r0, 0, dreg, doffset);
 357                         break;
 358
 359                 case 3 :
 360                         s390_icm  (code, s390_r0, 14, sreg, soffset);
 361                         s390_stcm (code, s390_r0, 14, dreg, doffset);
 362                         break;
 363
 364                 case 2 :
 365                         s390_lh  (code, s390_r0, 0, sreg, soffset);
 366                         s390_sth (code, s390_r0, 0, dreg, doffset);
 367                         break;
 368
 369                 case 1 :
 370                         s390_ic  (code, s390_r0, 0, sreg, soffset);
 371                         s390_stc (code, s390_r0, 0, dreg, doffset);
 372                         break;
 373
 374                 default :
 375                         while (size > 0) {
 376                                 int len;
 377
 378                                 if (size > 256)
 379                                         len = 256;
 380                                 else
 381                                         len = size;
 382                                 s390_mvc (code, len, dreg, doffset, sreg, soffset);
 383                                 size -= len;
 384                         }
 385         }
 386         return code;
 387 }
 388
 389 /*========================= End of Function ========================*/
 390
 391 /*------------------------------------------------------------------*/
 392 /*                                                                  */
 393 /* Name         - arch_get_argument_info                            */
 394 /*                                                                  */
 395 /* Function     - Gathers information on parameters such as size,   */
 396 /*                alignment, and padding. arg_info should be large  */
 397 /*                enough to hold param_count + 1 entries.           */
 398 /*                                                                  */
 399 /* Parameters   - @csig - Method signature                          */
 400 /*                @param_count - No. of parameters to consider      */
 401 /*                @arg_info - An array to store the result info     */
 402 /*                                                                  */
 403 /* Returns      - Size of the activation frame                      */
 404 /*                                                                  */
 405 /*------------------------------------------------------------------*/
 406
 407 int
 408 mono_arch_get_argument_info (MonoMethodSignature *csig,
 409                              int param_count,
 410                              MonoJitArgumentInfo *arg_info)
 411 {
 412         int k, frame_size = 0;
 413         int size, align, pad;
 414         int offset = 8;
 415
 416         if (MONO_TYPE_ISSTRUCT (csig->ret)) {
 417                 frame_size += sizeof (gpointer);
 418                 offset += 4;
 419         }
 420
 421         arg_info [0].offset = offset;
 422
 423         if (csig->hasthis) {
 424                 frame_size += sizeof (gpointer);
 425                 offset += 4;
 426         }
 427
 428         arg_info [0].size = frame_size;
 429
 430         for (k = 0; k < param_count; k++) {
 431
 432                 if (csig->pinvoke)
 433                         size = mono_type_native_stack_size (csig->params [k], &align);
 434                 else
 435                         size = mono_type_stack_size (csig->params [k], &align);
 436
 437                 frame_size += pad = (align - (frame_size & (align - 1))) & (align - 1);
 438                 arg_info [k].pad = pad;
 439                 frame_size += size;
 440                 arg_info [k + 1].pad = 0;
 441                 arg_info [k + 1].size = size;
 442                 offset += pad;
 443                 arg_info [k + 1].offset = offset;
 444                 offset += size;
 445         }
 446
 447         align = MONO_ARCH_FRAME_ALIGNMENT;
 448         frame_size += pad = (align - (frame_size & (align - 1))) & (align - 1);
 449         arg_info [k].pad = pad;
 450
 451         return frame_size;
 452 }
 453
 454 /*========================= End of Function ========================*/
 455
 456 /*------------------------------------------------------------------*/
 457 /*                                                                  */
 458 /* Name         - retFitsInReg.                                     */
 459 /*                                                                  */
 460 /* Function     - Determines if a value can be returned in one or   */
 461 /*                two registers.                                    */
 462 /*                                                                  */
 463 /*------------------------------------------------------------------*/
 464
 465 static inline gboolean
 466 retFitsInReg(guint32 size)
 467 {
 468         switch (size) {
 469                 case 0:
 470                 case 1:
 471                 case 2:
 472                 case 4:
 473                 case 8:
 474                         return (TRUE);
 475                 break;
 476                 default:
 477                         return (FALSE);
 478         }
 479 }
 480
 481 /*========================= End of Function ========================*/
 482
 483 /*------------------------------------------------------------------*/
 484 /*                                                                  */
 485 /* Name         - backStackPtr.                                     */
 486 /*                                                                  */
 487 /* Function     - Restore Stack Pointer to previous frame.          */
 488 /*                                                                  */
 489 /*------------------------------------------------------------------*/
 490
 491 static inline guint8 *
 492 backUpStackPtr(MonoCompile *cfg, guint8 *code, gint framePtr)
 493 {
 494         int stackSize = cfg->stack_usage;
 495
 496         if (s390_is_uimm16 (cfg->stack_usage)) {
 497                 s390_ahi  (code, framePtr, cfg->stack_usage);
 498         } else {
 499                 while (stackSize > 32767) {
 500                         s390_ahi  (code, framePtr, 32767);
 501                         stackSize -= 32767;
 502                 }
 503                 s390_ahi  (code, framePtr, stackSize);
 504         }
 505         return (code);
 506 }
 507
 508 /*========================= End of Function ========================*/
 509
 510 /*------------------------------------------------------------------*/
 511 /*                                                                  */
 512 /* Name         - indent                                            */
 513 /*                                                                  */
 514 /* Function     - Perform nice indenting to current level           */
 515 /*                                                                  */
 516 /*------------------------------------------------------------------*/
 517
 518 static void
 519 indent (int diff) {
 520         int v;
 521         if (diff < 0)
 522                 indent_level += diff;
 523         v = indent_level;
 524         printf("[%3d] ",v);
 525         while (v-- > 0) {
 526                 printf (". ");
 527         }
 528         if (diff > 0)
 529                 indent_level += diff;
 530 }
 531
 532 /*========================= End of Function ========================*/
 533
 534 /*------------------------------------------------------------------*/
 535 /*                                                                  */
 536 /* Name         - decodeParm                                        */
 537 /*                                                                  */
 538 /* Function     - Decode a parameter for the trace.                 */
 539 /*                                                                  */
 540 /*------------------------------------------------------------------*/
 541
 542 static void
 543 decodeParm(MonoType *type, void *curParm, int size)
 544 {
 545         guint32 simpleType;
 546
 547         if (type->byref) {
 548                 printf("[BYREF:%p], ", *((char **) curParm));
 549         } else {
 550                 simpleType = mono_type_get_underlying_type(type)->type;
 551 enum_parmtype:
 552                 switch (simpleType) {
 553                         case MONO_TYPE_I :
 554                                 printf ("[INTPTR:%p], ", *((int **) curParm));
 555                                 break;
 556                         case MONO_TYPE_U :
 557                                 printf ("[UINTPTR:%p], ", *((int **) curParm));
 558                                 break;
 559                         case MONO_TYPE_BOOLEAN :
 560                                 printf ("[BOOL:%d], ", *((int *) curParm));
 561                                 break;
 562                         case MONO_TYPE_CHAR :
 563                                 printf ("[CHAR:%c], ", *((int *) curParm));
 564                                 break;
 565                         case MONO_TYPE_I1 :
 566                                 printf ("[INT1:%d], ", *((int *) curParm));
 567                                 break;
 568                         case MONO_TYPE_I2 :
 569                                 printf ("[INT2:%d], ", *((int *) curParm));
 570                                 break;
 571                         case MONO_TYPE_I4 :
 572                                 printf ("[INT4:%d], ", *((int *) curParm));
 573                                 break;
 574                         case MONO_TYPE_U1 :
 575                                 printf ("[UINT1:%u], ", *((unsigned int *) curParm));
 576                                 break;
 577                         case MONO_TYPE_U2 :
 578                                 printf ("[UINT2:%u], ", *((guint16 *) curParm));
 579                                 break;
 580                         case MONO_TYPE_U4 :
 581                                 printf ("[UINT4:%u], ", *((guint32 *) curParm));
 582                                 break;
 583                         case MONO_TYPE_U8 :
 584                                 printf ("[UINT8:%llu], ", *((guint64 *) curParm));
 585                                 break;
 586                         case MONO_TYPE_STRING : {
 587                                 MonoString *s = *((MonoString **) curParm);
 588                                 if (s) {
 589                                         g_assert (((MonoObject *) s)->vtable->klass == mono_defaults.string_class);
 590                                         printf("[STRING:%p:%s], ", s, mono_string_to_utf8(s));
 591                                 } else {
 592                                         printf("[STRING:null], ");
 593                                 }
 594                                 break;
 595                         }
 596                         case MONO_TYPE_CLASS :
 597                         case MONO_TYPE_OBJECT : {
 598                                 MonoObject *obj = *((MonoObject **) curParm);
 599                                 MonoClass *class;
 600                                 if ((obj) && (obj->vtable)) {
 601                                         printf("[CLASS/OBJ:");
 602                                         class = obj->vtable->klass;
 603                                         printf("%p [%p] ",obj,curParm);
 604 //                                      if (class == mono_defaults.string_class) {
 605 //                                              printf("[STRING:%p:%s]",
 606 //                                                     *obj, mono_string_to_utf8 (obj));
 607 //                                      } else if (class == mono_defaults.int32_class) {
 608 //                                              printf("[INT32:%p:%d]",
 609 //                                                      obj, *(gint32 *)((char *)obj + sizeof (MonoObject)));
 610 //                                      } else
 611 //                                              printf("[%s.%s:%p]",
 612 //                                                     class->name_space, class->name, obj);
 613                                         printf("], ");
 614                                 } else {
 615                                         printf("[OBJECT:null], ");
 616                                 }
 617                                 break;
 618                         }
 619                         case MONO_TYPE_PTR :
 620                                 printf("[PTR:%p], ", *((gpointer **) (curParm)));
 621                                 break;
 622                         case MONO_TYPE_FNPTR :
 623                                 printf("[FNPTR:%p], ", *((gpointer **) (curParm)));
 624                                 break;
 625                         case MONO_TYPE_ARRAY :
 626                                 printf("[ARRAY:%p], ", *((gpointer **) (curParm)));
 627                                 break;
 628                         case MONO_TYPE_SZARRAY :
 629                                 printf("[SZARRAY:%p], ", *((gpointer **) (curParm)));
 630                                 break;
 631                         case MONO_TYPE_I8 :
 632                                 printf("[INT8:%lld], ", *((gint64 *) (curParm)));
 633                                 break;
 634                         case MONO_TYPE_R4 :
 635                                 printf("[FLOAT4:%g], ", *((double *) (curParm)));
 636                                 break;
 637                         case MONO_TYPE_R8 :
 638                                 printf("[FLOAT8:%g], ", *((double *) (curParm)));
 639                                 break;
 640                         case MONO_TYPE_VALUETYPE : {
 641                                 int i;
 642                                 MonoMarshalType *info;
 643
 644                                 if (type->data.klass->enumtype) {
 645                                         simpleType = type->data.klass->enum_basetype->type;
 646                                         printf("{VALUETYPE} - ");
 647                                         goto enum_parmtype;
 648                                 }
 649
 650                                 info = mono_marshal_load_type_info (type->data.klass);
 651
 652                                 if ((info->native_size == sizeof(float)) &&
 653                                     (info->num_fields  == 1) &&
 654                                     (info->fields[0].field->type->type == MONO_TYPE_R4)) {
 655                                                 printf("[FLOAT4:%f], ", *((float *) (curParm)));
 656                                         break;
 657                                 }
 658
 659                                 if ((info->native_size == sizeof(double)) &&
 660                                     (info->num_fields  == 1) &&
 661                                     (info->fields[0].field->type->type == MONO_TYPE_R8)) {
 662                                         printf("[FLOAT8:%g], ", *((double *) (curParm)));
 663                                         break;
 664                                 }
 665
 666                                 printf("[VALUETYPE:");
 667                                 for (i = 0; i < size; i++)
 668                                         printf("%02x,", *((guint8 *)curParm+i));
 669                                 printf("]");
 670                                 break;
 671                         }
 672                         case MONO_TYPE_TYPEDBYREF: {
 673                                 int i;
 674                                 printf("[TYPEDBYREF:");
 675                                 for (i = 0; i < size; i++)
 676                                         printf("%02x,", *((guint8 *)curParm+i));
 677                                 printf("]");
 678                                 break;
 679                         }
 680                         default :
 681                                 printf("[?? - %d], ",simpleType);
 682                 }
 683         }
 684 }
 685
 686 /*========================= End of Function ========================*/
 687
 688 static int lc = 0;
 689 /*------------------------------------------------------------------*/
 690 /*                                                                  */
 691 /* Name         - enter_method                                      */
 692 /*                                                                  */
 693 /* Function     - Perform tracing of the entry to the current       */
 694 /*                method.                                           */
 695 /*                                                                  */
 696 /*------------------------------------------------------------------*/
 697
 698 static void
 699 enter_method (MonoMethod *method, RegParm *rParm, char *sp)
 700 {
 701         int i, oParm = 0, iParm = 0;
 702         MonoClass *class;
 703         MonoObject *obj;
 704         MonoMethodSignature *sig;
 705         char *fname;
 706         guint32 ip;
 707         CallInfo *cinfo;
 708         ArgInfo *ainfo;
 709         size_data sz;
 710         void *curParm;
 711
 712
 713 lc++;
 714 if (lc > 50000) {
 715 fseek(stdout, 0L, SEEK_SET);
 716 lc = 0;
 717 }
 718         fname = mono_method_full_name (method, TRUE);
 719         indent (1);
 720         printf ("ENTER: %s(", fname);
 721         g_free (fname);
 722
 723         ip  = (*(guint32 *) (sp+S390_RET_ADDR_OFFSET)) & 0x7fffffff;
 724         printf (") ip: %p sp: %p - ", (gpointer) ip, sp);
 725
 726         if (rParm == NULL)
 727                 return;
 728
 729         sig = mono_method_signature (method);
 730
 731         cinfo = calculate_sizes (sig, &sz, sig->pinvoke);
 732
 733         if (cinfo->struct_ret) {
 734                 printf ("[VALUERET:%p], ", (gpointer) rParm->gr[0]);
 735                 iParm = 1;
 736         }
 737
 738         if (sig->hasthis) {
 739                 gpointer *this = (gpointer *) rParm->gr[iParm];
 740                 obj = (MonoObject *) this;
 741                 if (method->klass->valuetype) {
 742                         if (obj) {
 743                                 printf("this:[value:%p:%08x], ",
 744                                        this, *((guint32 *)(this+sizeof(MonoObject))));
 745                         } else
 746                                 printf ("this:[NULL], ");
 747                 } else {
 748                         if (obj) {
 749 //                              class = obj->vtable->klass;
 750 //                              if (class == mono_defaults.string_class) {
 751 //                                      printf ("this:[STRING:%p:%s], ",
 752 //                                              obj, mono_string_to_utf8 ((MonoString *)obj));
 753 //                              } else {
 754 //                                      printf ("this:%p[%s.%s], ",
 755 //                                              obj, class->name_space, class->name);
 756 //                              }
 757 printf("this:%p, ",obj);
 758                         } else
 759                                 printf ("this:NULL, ");
 760                 }
 761                 oParm++;
 762         }
 763
 764         for (i = 0; i < sig->param_count; ++i) {
 765                 ainfo = &cinfo->args[i + oParm];
 766                 switch (ainfo->regtype) {
 767                         case RegTypeGeneral :
 768                                 decodeParm(sig->params[i], &(rParm->gr[ainfo->reg-2]), ainfo->size);
 769                                 break;
 770                         case RegTypeFP :
 771                                 decodeParm(sig->params[i], &(rParm->fp[ainfo->reg]), ainfo->size);
 772                                 break;
 773                         case RegTypeBase :
 774                                 decodeParm(sig->params[i], sp+ainfo->offset, ainfo->size);
 775                                 break;
 776                         case RegTypeStructByVal :
 777                                 if (ainfo->reg != STK_BASE)
 778                                         curParm = &(rParm->gr[ainfo->reg-2]);
 779                                 else
 780                                         curParm = sp+ainfo->offset;
 781
 782                                 if (retFitsInReg (ainfo->vtsize))
 783                                         decodeParm(sig->params[i],
 784                                                    curParm,
 785                                                    ainfo->size);
 786                                 else
 787                                         decodeParm(sig->params[i],
 788                                                    *((char **) curParm),
 789                                                    ainfo->vtsize);
 790                                 break;
 791                         case RegTypeStructByAddr :
 792                                 if (ainfo->reg != STK_BASE)
 793                                         curParm = &(rParm->gr[ainfo->reg-2]);
 794                                 else
 795                                         curParm = sp+ainfo->offset;
 796
 797                                 decodeParm(sig->params[i],
 798                                            *((char **) curParm),
 799                                            ainfo->vtsize);
 800                                 break;
 801
 802                         default :
 803                                 printf("???, ");
 804                 }
 805         }
 806         printf("\n");
 807         g_free(cinfo);
 808 }
 809
 810 /*========================= End of Function ========================*/
 811
 812 /*------------------------------------------------------------------*/
 813 /*                                                                  */
 814 /* Name         - leave_method                                      */
 815 /*                                                                  */
 816 /* Function     -                                                   */
 817 /*                                                                  */
 818 /*------------------------------------------------------------------*/
 819
 820 static void
 821 leave_method (MonoMethod *method, ...)
 822 {
 823         MonoType *type;
 824         char *fname;
 825         guint32 ip;
 826         va_list ap;
 827
 828         va_start(ap, method);
 829
 830         fname = mono_method_full_name (method, TRUE);
 831         indent (-1);
 832         printf ("LEAVE: %s", fname);
 833         g_free (fname);
 834
 835         type = mono_method_signature (method)->ret;
 836
 837 handle_enum:
 838         switch (type->type) {
 839         case MONO_TYPE_VOID:
 840                 break;
 841         case MONO_TYPE_BOOLEAN: {
 842                 int val = va_arg (ap, int);
 843                 if (val)
 844                         printf ("[TRUE:%d]", val);
 845                 else
 846                         printf ("[FALSE]");
 847
 848                 break;
 849         }
 850         case MONO_TYPE_CHAR: {
 851                 int val = va_arg (ap, int);
 852                 printf ("[CHAR:%d]", val);
 853                 break;
 854         }
 855         case MONO_TYPE_I1: {
 856                 int val = va_arg (ap, int);
 857                 printf ("[INT1:%d]", val);
 858                 break;
 859         }
 860         case MONO_TYPE_U1: {
 861                 int val = va_arg (ap, int);
 862                 printf ("[UINT1:%d]", val);
 863                 break;
 864         }
 865         case MONO_TYPE_I2: {
 866                 int val = va_arg (ap, int);
 867                 printf ("[INT2:%d]", val);
 868                 break;
 869         }
 870         case MONO_TYPE_U2: {
 871                 int val = va_arg (ap, int);
 872                 printf ("[UINT2:%d]", val);
 873                 break;
 874         }
 875         case MONO_TYPE_I4: {
 876                 int val = va_arg (ap, int);
 877                 printf ("[INT4:%d]", val);
 878                 break;
 879         }
 880         case MONO_TYPE_U4: {
 881                 int val = va_arg (ap, int);
 882                 printf ("[UINT4:%d]", val);
 883                 break;
 884         }
 885         case MONO_TYPE_I: {
 886                 int val = va_arg (ap, int);
 887                 printf ("[INT:%d]", val);
 888                 printf("]");
 889                 break;
 890         }
 891         case MONO_TYPE_U: {
 892                 int val = va_arg (ap, int);
 893                 printf ("[UINT:%d]", val);
 894                 printf("]");
 895                 break;
 896         }
 897         case MONO_TYPE_STRING: {
 898                 MonoString *s = va_arg (ap, MonoString *);
 899 ;
 900                 if (s) {
 901                         g_assert (((MonoObject *)s)->vtable->klass == mono_defaults.string_class);
 902                         printf ("[STRING:%p:%s]", s, mono_string_to_utf8 (s));
 903                 } else
 904                         printf ("[STRING:null], ");
 905                 break;
 906         }
 907         case MONO_TYPE_CLASS:
 908         case MONO_TYPE_OBJECT: {
 909                 MonoObject *o = va_arg (ap, MonoObject *);
 910
 911 //              if ((o) && (o->vtable)) {
 912 //                      if (o->vtable->klass == mono_defaults.boolean_class) {
 913 //                              printf ("[BOOLEAN:%p:%d]", o, *((guint8 *)o + sizeof (MonoObject)));
 914 //                      } else if  (o->vtable->klass == mono_defaults.int32_class) {
 915 //                              printf ("[INT32:%p:%d]", o, *((gint32 *)((char *)o + sizeof (MonoObject))));
 916 //                      } else if  (o->vtable->klass == mono_defaults.int64_class) {
 917 //                              printf ("[INT64:%p:%lld]", o, *((gint64 *)((char *)o + sizeof (MonoObject))));
 918 //                      } else
 919 //                              printf ("[%s.%s:%p]", o->vtable->klass->name_space, o->vtable->klass->name, o);
 920 //              } else
 921                         printf ("[OBJECT:%p]", o);
 922
 923                 break;
 924         }
 925         case MONO_TYPE_PTR:
 926         case MONO_TYPE_FNPTR:
 927         case MONO_TYPE_ARRAY:
 928         case MONO_TYPE_SZARRAY: {
 929                 gpointer p = va_arg (ap, gpointer);
 930                 printf ("[result=%p]", p);
 931                 break;
 932         }
 933         case MONO_TYPE_I8: {
 934                 gint64 l =  va_arg (ap, gint64);
 935                 printf ("[LONG:%lld]", l);
 936                 break;
 937         }
 938         case MONO_TYPE_U8: {
 939                 guint64 l =  va_arg (ap, guint64);
 940                 printf ("[ULONG:%llu]", l);
 941                 break;
 942         }
 943         case MONO_TYPE_R4: {
 944                 float f;
 945                 f = va_arg (ap, double);
 946                 printf ("[FLOAT4:%f]\n", f);
 947                 break;
 948         }
 949         case MONO_TYPE_R8: {
 950                 double f = va_arg (ap, double);
 951                 printf ("[FLOAT8:%g]\n", f);
 952                 break;
 953         }
 954         case MONO_TYPE_VALUETYPE: {
 955                 MonoMarshalType *info;
 956                 if (type->data.klass->enumtype) {
 957                         type = type->data.klass->enum_basetype;
 958                         goto handle_enum;
 959                 } else {
 960                         guint8 *p = va_arg (ap, gpointer);
 961                         int j, size, align;
 962
 963                         info = mono_marshal_load_type_info (type->data.klass);
 964
 965                         if ((info->native_size == sizeof(float)) &&
 966                             (info->num_fields  == 1) &&
 967                             (info->fields[0].field->type->type == MONO_TYPE_R4)) {
 968                                 double f = va_arg (ap, double);
 969                                 printf("[FLOAT4:%g]\n", (double) f);
 970                                 break;
 971                         }
 972
 973                         if ((info->native_size == sizeof(double)) &&
 974                             (info->num_fields  == 1) &&
 975                             (info->fields[0].field->type->type == MONO_TYPE_R8)) {
 976                                 double f = va_arg (ap, double);
 977                                 printf("[FLOAT8:%g]\n", f);
 978                                 break;
 979                         }
 980
 981                         size = mono_type_size (type, &align);
 982                         printf ("[");
 983                         for (j = 0; p && j < size; j++)
 984                                 printf ("%02x,", p [j]);
 985                         printf ("]");
 986                 }
 987                 break;
 988         }
 989         case MONO_TYPE_TYPEDBYREF: {
 990                 guint8 *p = va_arg (ap, gpointer);
 991                 int j, size, align;
 992                 size = mono_type_size (type, &align);
 993                 printf ("[");
 994                 for (j = 0; p && j < size; j++)
 995                         printf ("%02x,", p [j]);
 996                 printf ("]");
 997         }
 998                 break;
 999         default:
1000                 printf ("(unknown return type %x)",
1001                         mono_method_signature (method)->ret->type);
1002         }
1003
1004         ip = ((gint32) __builtin_return_address (0)) & 0x7fffffff;
1005         printf (" ip: %p\n", (gpointer) ip);
1006 }
1007
1008 /*========================= End of Function ========================*/
1009
1010 /*------------------------------------------------------------------*/
1011 /*                                                                  */
1012 /* Name         - mono_arch_cpu_init                                */
1013 /*                                                                  */
1014 /* Function     - Perform CPU specific initialization to execute    */
1015 /*                managed code.                                     */
1016 /*                                                                  */
1017 /*------------------------------------------------------------------*/
1018
1019 void
1020 mono_arch_cpu_init (void)
1021 {
1022         guint mode = 1;
1023
1024         /*--------------------------------------*/
1025         /* Set default rounding mode for FP     */
1026         /*--------------------------------------*/
1027         __asm__ ("SRNM\t%0\n\t"
1028                 : : "m" (mode));
1029 }
1030
1031 /*========================= End of Function ========================*/
1032
1033 /*------------------------------------------------------------------*/
1034 /*                                                                  */
1035 /* Name         - mono_arch_cpu_optimizazions                       */
1036 /*                                                                  */
1037 /* Function     - Returns the optimizations supported on this CPU   */
1038 /*                                                                  */
1039 /*------------------------------------------------------------------*/
1040
1041 guint32
1042 mono_arch_cpu_optimizazions (guint32 *exclude_mask)
1043 {
1044         guint32 opts = 0;
1045
1046         /*----------------------------------------------------------*/
1047         /* no s390-specific optimizations yet                       */
1048         /*----------------------------------------------------------*/
1049         *exclude_mask = MONO_OPT_INLINE|MONO_OPT_LINEARS;
1050 //      *exclude_mask = MONO_OPT_INLINE;
1051         return opts;
1052 }
1053
1054 /*========================= End of Function ========================*/
1055
1056 /*------------------------------------------------------------------*/
1057 /*                                                                  */
1058 /* Name         -                                                   */
1059 /*                                                                  */
1060 /* Function     -                                                   */
1061 /*                                                                  */
1062 /*------------------------------------------------------------------*/
1063
1064 static gboolean
1065 is_regsize_var (MonoType *t) {
1066         if (t->byref)
1067                 return TRUE;
1068         switch (mono_type_get_underlying_type (t)->type) {
1069         case MONO_TYPE_I4:
1070         case MONO_TYPE_U4:
1071         case MONO_TYPE_I:
1072         case MONO_TYPE_U:
1073                 return TRUE;
1074         case MONO_TYPE_OBJECT:
1075         case MONO_TYPE_STRING:
1076         case MONO_TYPE_CLASS:
1077         case MONO_TYPE_SZARRAY:
1078         case MONO_TYPE_ARRAY:
1079                 return FALSE;
1080         case MONO_TYPE_VALUETYPE:
1081                 if (t->data.klass->enumtype)
1082                         return is_regsize_var (t->data.klass->enum_basetype);
1083                 return FALSE;
1084         }
1085         return FALSE;
1086 }
1087
1088 /*========================= End of Function ========================*/
1089
1090 /*------------------------------------------------------------------*/
1091 /*                                                                  */
1092 /* Name         - mono_arch_get_allocatable_int_vars                */
1093 /*                                                                  */
1094 /* Function     -                                                   */
1095 /*                                                                  */
1096 /*------------------------------------------------------------------*/
1097
1098 GList *
1099 mono_arch_get_allocatable_int_vars (MonoCompile *cfg)
1100 {
1101         GList *vars = NULL;
1102         int i;
1103
1104         for (i = 0; i < cfg->num_varinfo; i++) {
1105                 MonoInst *ins = cfg->varinfo [i];
1106                 MonoMethodVar *vmv = MONO_VARINFO (cfg, i);
1107
1108                 /* unused vars */
1109                 if (vmv->range.first_use.abs_pos >= vmv->range.last_use.abs_pos)
1110                         continue;
1111
1112                 if (ins->flags & (MONO_INST_VOLATILE|MONO_INST_INDIRECT) ||
1113                     (ins->opcode != OP_LOCAL && ins->opcode != OP_ARG))
1114                         continue;
1115
1116                 /* we can only allocate 32 bit values */
1117                 if (is_regsize_var (ins->inst_vtype)) {
1118                         g_assert (MONO_VARINFO (cfg, i)->reg == -1);
1119                         g_assert (i == vmv->idx);
1120                         vars = mono_varlist_insert_sorted (cfg, vars, vmv, FALSE);
1121                 }
1122         }
1123
1124         return vars;
1125 }
1126
1127 /*========================= End of Function ========================*/
1128
1129 /*------------------------------------------------------------------*/
1130 /*                                                                  */
1131 /* Name         - mono_arch_global_int_regs                         */
1132 /*                                                                  */
1133 /* Function     - Return a list of usable integer registers.        */
1134 /*                                                                  */
1135 /*------------------------------------------------------------------*/
1136
1137 GList *
1138 mono_arch_get_global_int_regs (MonoCompile *cfg)
1139 {
1140         GList *regs = NULL;
1141         MonoMethodHeader *header;
1142         int i, top = 13;
1143
1144         header = mono_method_get_header (cfg->method);
1145         if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
1146                 cfg->frame_reg = s390_r11;
1147
1148         for (i = 8; i < top; ++i) {
1149                 if (cfg->frame_reg != i)
1150                         regs = g_list_prepend (regs, GUINT_TO_POINTER (i));
1151         }
1152
1153         return regs;
1154 }
1155
1156 /*========================= End of Function ========================*/
1157
1158 /*------------------------------------------------------------------*/
1159 /*                                                                  */
1160 /* Name         -  mono_arch_flush_icache                           */
1161 /*                                                                  */
1162 /* Function     -  Flush the CPU icache.                            */
1163 /*                                                                  */
1164 /*------------------------------------------------------------------*/
1165
1166 void
1167 mono_arch_flush_icache (guint8 *code, gint size)
1168 {
1169 }
1170
1171 /*========================= End of Function ========================*/
1172
1173 /*------------------------------------------------------------------*/
1174 /*                                                                  */
1175 /* Name         - add_general                                       */
1176 /*                                                                  */
1177 /* Function     - Determine code and stack size incremements for a  */
1178 /*                parameter.                                        */
1179 /*                                                                  */
1180 /*------------------------------------------------------------------*/
1181
1182 static void inline
1183 add_general (guint *gr, size_data *sz, ArgInfo *ainfo, gboolean simple)
1184 {
1185         if (simple) {
1186                 if (*gr > S390_LAST_ARG_REG) {
1187                         sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1188                         ainfo->offset   = sz->stack_size;
1189                         ainfo->reg      = STK_BASE;
1190                         ainfo->regtype  = RegTypeBase;
1191                         sz->stack_size += sizeof(int);
1192                         sz->local_size += sizeof(int);
1193                         sz->code_size  += 12;
1194                 } else {
1195                         ainfo->reg      = *gr;
1196                         sz->code_size  += 8;
1197                 }
1198         } else {
1199                 if (*gr > S390_LAST_ARG_REG - 1) {
1200                         sz->stack_size  = S390_ALIGN(sz->stack_size, S390_STACK_ALIGNMENT);
1201                         ainfo->offset   = sz->stack_size;
1202                         ainfo->reg      = STK_BASE;
1203                         ainfo->regtype  = RegTypeBase;
1204                         sz->stack_size += sizeof(long long);
1205                         sz->local_size += sizeof(long long);
1206                         sz->code_size  += 10;
1207                 } else {
1208                         ainfo->reg      = *gr;
1209                         sz->code_size  += 8;
1210                 }
1211                 (*gr) ++;
1212         }
1213         (*gr) ++;
1214 }
1215
1216 /*========================= End of Function ========================*/
1217
1218 /*------------------------------------------------------------------*/
1219 /*                                                                  */
1220 /* Name         - add_stackParm                                     */
1221 /*                                                                  */
1222 /* Function     - Determine code and stack size incremements for a  */
1223 /*                parameter.                                        */
1224 /*                                                                  */
1225 /*------------------------------------------------------------------*/
1226
1227 static void inline
1228 add_stackParm (guint *gr, size_data *sz, ArgInfo *ainfo, gint size)
1229 {
1230         if (*gr > S390_LAST_ARG_REG) {
1231                 sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1232                 ainfo->offset   = sz->stack_size;
1233                 ainfo->reg      = STK_BASE;
1234                 sz->parm_size  += sizeof(gpointer);
1235         } else {
1236                 ainfo->reg      = *gr;
1237         }
1238         (*gr) ++;
1239         ainfo->offparm  = sz->parm_size;
1240         ainfo->size     = sizeof(gpointer);
1241         ainfo->regtype  = RegTypeStructByAddr;
1242         ainfo->vtsize   = size;
1243         sz->local_size += (size + sizeof(gpointer));
1244         sz->parm_size  += size;
1245 }
1246
1247 /*========================= End of Function ========================*/
1248
1249 /*------------------------------------------------------------------*/
1250 /*                                                                  */
1251 /* Name         - add_float                                         */
1252 /*                                                                  */
1253 /* Function     - Determine code and stack size incremements for a  */
1254 /*                float parameter.                                  */
1255 /*                                                                  */
1256 /*------------------------------------------------------------------*/
1257
1258 static void inline
1259 add_float (guint *fr,  size_data *sz, ArgInfo *ainfo)
1260 {
1261         if ((*fr) <= S390_LAST_FPARG_REG) {
1262                 ainfo->regtype = RegTypeFP;
1263                 ainfo->reg     = *fr;
1264                 sz->code_size += 4;
1265                 (*fr) += 2;
1266         }
1267         else {
1268                 ainfo->offset   = sz->stack_size;
1269                 ainfo->reg      = STK_BASE;
1270                 ainfo->regtype  = RegTypeBase;
1271                 sz->code_size  += 4;
1272                 sz->stack_size += ainfo->size;
1273                 sz->local_size += ainfo->size;
1274         }
1275 }
1276
1277 /*========================= End of Function ========================*/
1278
1279 /*------------------------------------------------------------------*/
1280 /*                                                                  */
1281 /* Name         - calculate_sizes                                   */
1282 /*                                                                  */
1283 /* Function     - Determine the amount of space required for code   */
1284 /*                and stack. In addition determine starting points  */
1285 /*                for stack-based parameters, and area for struct-  */
1286 /*                ures being returned on the stack.                 */
1287 /*                                                                  */
1288 /*------------------------------------------------------------------*/
1289
1290 static CallInfo *
1291 calculate_sizes (MonoMethodSignature *sig, size_data *sz,
1292                  gboolean string_ctor)
1293 {
1294         guint i, fr, gr, size;
1295         int nParm = sig->hasthis + sig->param_count;
1296         guint32 simpletype, align;
1297         CallInfo *cinfo = g_malloc0 (sizeof (CallInfo) + sizeof (ArgInfo) * nParm);
1298
1299         fr                = 0;
1300         gr                = s390_r2;
1301         nParm             = 0;
1302         cinfo->struct_ret = 0;
1303         cinfo->offStruct  = 0;
1304         sz->retStruct     = 0;
1305         sz->stack_size    = S390_MINIMAL_STACK_SIZE;
1306         sz->code_size     = 0;
1307         sz->parm_size     = 0;
1308         sz->local_size    = 0;
1309
1310         /*----------------------------------------------------------*/
1311         /* We determine the size of the return code/stack in case we*/
1312         /* need to reserve a register to be used to address a stack */
1313         /* area that the callee will use.                           */
1314         /*----------------------------------------------------------*/
1315
1316         simpletype = mono_type_get_underlying_type (sig->ret)->type;
1317 enum_retvalue:
1318         switch (simpletype) {
1319                 case MONO_TYPE_BOOLEAN:
1320                 case MONO_TYPE_I1:
1321                 case MONO_TYPE_U1:
1322                 case MONO_TYPE_I2:
1323                 case MONO_TYPE_U2:
1324                 case MONO_TYPE_CHAR:
1325                 case MONO_TYPE_I4:
1326                 case MONO_TYPE_U4:
1327                 case MONO_TYPE_I:
1328                 case MONO_TYPE_U:
1329                 case MONO_TYPE_CLASS:
1330                 case MONO_TYPE_OBJECT:
1331                 case MONO_TYPE_SZARRAY:
1332                 case MONO_TYPE_ARRAY:
1333                 case MONO_TYPE_PTR:
1334                 case MONO_TYPE_FNPTR:
1335                 case MONO_TYPE_STRING:
1336                         cinfo->ret.reg = s390_r2;
1337                         sz->code_size += 4;
1338                         break;
1339                 case MONO_TYPE_R4:
1340                 case MONO_TYPE_R8:
1341                         cinfo->ret.reg = s390_f0;
1342                         sz->code_size += 4;
1343                         break;
1344                 case MONO_TYPE_I8:
1345                 case MONO_TYPE_U8:
1346                         cinfo->ret.reg = s390_r2;
1347                         sz->code_size += 4;
1348                         break;
1349                 case MONO_TYPE_VALUETYPE: {
1350                         MonoClass *klass = mono_class_from_mono_type (sig->ret);
1351                         if (sig->ret->data.klass->enumtype) {
1352                                 simpletype = sig->ret->data.klass->enum_basetype->type;
1353                                 goto enum_retvalue;
1354                         }
1355                         if (sig->pinvoke)
1356                                 size = mono_class_native_size (klass, &align);
1357                         else
1358                                 size = mono_class_value_size (klass, &align);
1359
1360                         cinfo->ret.reg    = s390_r2;
1361                         cinfo->struct_ret = 1;
1362                         cinfo->ret.size   = size;
1363                         cinfo->ret.vtsize = size;
1364                         gr++;
1365                         break;
1366                 }
1367                 case MONO_TYPE_TYPEDBYREF:
1368                         size = sizeof (MonoTypedRef);
1369                         cinfo->ret.reg    = s390_r2;
1370                         cinfo->struct_ret = 1;
1371                         cinfo->ret.size   = size;
1372                         cinfo->ret.vtsize = size;
1373                         gr++;
1374                         break;
1375                 case MONO_TYPE_VOID:
1376                         break;
1377                 default:
1378                         g_error ("Can't handle as return value 0x%x", sig->ret->type);
1379         }
1380
1381         if (sig->hasthis) {
1382                 add_general (&gr, sz, cinfo->args+nParm, TRUE);
1383                 cinfo->args[nParm].size = sizeof(gpointer);
1384                 nParm++;
1385         }
1386
1387         /*----------------------------------------------------------*/
1388         /* We determine the size of the parameter code and stack    */
1389         /* requirements by checking the types and sizes of the      */
1390         /* parameters.                                              */
1391         /*----------------------------------------------------------*/
1392
1393         for (i = 0; i < sig->param_count; ++i) {
1394                 /*--------------------------------------------------*/
1395                 /* Handle vararg type calls. All args are put on    */
1396                 /* the stack.                                       */
1397                 /*--------------------------------------------------*/
1398                 if ((sig->call_convention == MONO_CALL_VARARG) &&
1399                     (i == sig->sentinelpos)) {
1400                         gr = S390_LAST_ARG_REG + 1;
1401                         add_general (&gr, sz, &cinfo->sigCookie, TRUE);
1402                 }
1403
1404                 if (sig->params [i]->byref) {
1405                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1406                         cinfo->args[nParm].size = sizeof(gpointer);
1407                         nParm++;
1408                         continue;
1409                 }
1410
1411                 simpletype = mono_type_get_underlying_type(sig->params [i])->type;
1412                 switch (simpletype) {
1413                 case MONO_TYPE_BOOLEAN:
1414                 case MONO_TYPE_I1:
1415                 case MONO_TYPE_U1:
1416                         cinfo->args[nParm].size = sizeof(char);
1417                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1418                         nParm++;
1419                         break;
1420                 case MONO_TYPE_I2:
1421                 case MONO_TYPE_U2:
1422                 case MONO_TYPE_CHAR:
1423                         cinfo->args[nParm].size = sizeof(short);
1424                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1425                         nParm++;
1426                         break;
1427                 case MONO_TYPE_I4:
1428                 case MONO_TYPE_U4:
1429                         cinfo->args[nParm].size = sizeof(int);
1430                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1431                         nParm++;
1432                         break;
1433                 case MONO_TYPE_I:
1434                 case MONO_TYPE_U:
1435                 case MONO_TYPE_PTR:
1436                 case MONO_TYPE_FNPTR:
1437                 case MONO_TYPE_CLASS:
1438                 case MONO_TYPE_OBJECT:
1439                 case MONO_TYPE_STRING:
1440                 case MONO_TYPE_SZARRAY:
1441                 case MONO_TYPE_ARRAY:
1442                         cinfo->args[nParm].size = sizeof(gpointer);
1443                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1444                         nParm++;
1445                         break;
1446                 case MONO_TYPE_I8:
1447                 case MONO_TYPE_U8:
1448                         cinfo->args[nParm].size = sizeof(long long);
1449                         add_general (&gr, sz, cinfo->args+nParm, FALSE);
1450                         nParm++;
1451                         break;
1452                 case MONO_TYPE_R4:
1453                         cinfo->args[nParm].size = sizeof(float);
1454                         add_float (&fr, sz, cinfo->args+nParm);
1455                         nParm++;
1456                         break;
1457                 case MONO_TYPE_R8:
1458                         cinfo->args[nParm].size = sizeof(double);
1459                         add_float (&fr, sz, cinfo->args+nParm);
1460                         nParm++;
1461                         break;
1462                 case MONO_TYPE_VALUETYPE: {
1463                         MonoMarshalType *info;
1464                         MonoClass *klass = mono_class_from_mono_type (sig->params [i]);
1465                         if (sig->pinvoke)
1466                                 size = mono_class_native_size (klass, &align);
1467                         else
1468                                 size = mono_class_value_size (klass, &align);
1469
1470                         info = mono_marshal_load_type_info (klass);
1471
1472                         if ((info->native_size == sizeof(float)) &&
1473                             (info->num_fields  == 1) &&
1474                             (info->fields[0].field->type->type == MONO_TYPE_R4)) {
1475                                 cinfo->args[nParm].size = sizeof(float);
1476                                 add_float(&fr, sz, cinfo->args+nParm);
1477                                 break;
1478                         }
1479
1480                         if ((info->native_size == sizeof(double)) &&
1481                             (info->num_fields  == 1) &&
1482                             (info->fields[0].field->type->type == MONO_TYPE_R8)) {
1483                                 cinfo->args[nParm].size = sizeof(double);
1484                                 add_float(&fr, sz, cinfo->args+nParm);
1485                                 break;
1486                         }
1487
1488                         cinfo->args[nParm].vtsize  = 0;
1489                         cinfo->args[nParm].size    = 0;
1490
1491                         switch (size) {
1492                                 /*----------------------------------*/
1493                                 /* On S/390, structures of size 1,  */
1494                                 /* 2, 4, and 8 bytes are passed in  */
1495                                 /* (a) register(s).                 */
1496                                 /*----------------------------------*/
1497                                 case 0:
1498                                 case 1:
1499                                 case 2:
1500                                 case 4:
1501                                         add_general(&gr, sz, cinfo->args+nParm, TRUE);
1502                                         cinfo->args[nParm].size    = size;
1503                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1504                                         nParm++;
1505                                         sz->local_size            += sizeof(long);
1506                                         break;
1507                                 case 8:
1508                                         add_general(&gr, sz, cinfo->args+nParm, FALSE);
1509                                         cinfo->args[nParm].size    = sizeof(long long);
1510                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1511                                         nParm++;
1512                                         sz->local_size            += sizeof(long);
1513                                         break;
1514                                 default:
1515                                         add_stackParm(&gr, sz, cinfo->args+nParm, size);
1516                                         nParm++;
1517                         }
1518                 }
1519                         break;
1520                 case MONO_TYPE_TYPEDBYREF: {
1521                         int size = sizeof (MonoTypedRef);
1522
1523                         cinfo->args[nParm].vtsize  = 0;
1524                         cinfo->args[nParm].size    = 0;
1525
1526                         switch (size) {
1527                                 /*----------------------------------*/
1528                                 /* On S/390, structures of size 1,  */
1529                                 /* 2, 4, and 8 bytes are passed in  */
1530                                 /* (a) register(s).                 */
1531                                 /*----------------------------------*/
1532                                 case 0:
1533                                 case 1:
1534                                 case 2:
1535                                 case 4:
1536                                         add_general(&gr, sz, cinfo->args+nParm, TRUE);
1537                                         cinfo->args[nParm].size    = size;
1538                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1539                                         nParm++;
1540                                         sz->local_size            += sizeof(long);
1541                                         break;
1542                                 case 8:
1543                                         add_general(&gr, sz, cinfo->args+nParm, FALSE);
1544                                         cinfo->args[nParm].size    = sizeof(long long);
1545                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1546                                         nParm++;
1547                                         sz->local_size            += sizeof(long);
1548                                         break;
1549                                 default:
1550                                         add_stackParm(&gr, sz, cinfo->args+nParm, size);
1551                                         nParm++;
1552                         }
1553                 }
1554                         break;
1555                 default:
1556                         g_error ("Can't trampoline 0x%x", sig->params [i]->type);
1557                 }
1558         }
1559
1560         /*----------------------------------------------------------*/
1561         /* If we are passing a structure back then if it won't be   */
1562         /* in a register(s) then we make room at the end of the     */
1563         /* parameters that may have been placed on the stack        */
1564         /*----------------------------------------------------------*/
1565         if (cinfo->struct_ret) {
1566                 cinfo->ret.offset = sz->stack_size;
1567                 switch (cinfo->ret.size) {
1568                 case 0:
1569                 case 1:
1570                 case 2:
1571                 case 4:
1572                 case 8:
1573                         break;
1574                 default:
1575                         sz->stack_size   += S390_ALIGN(cinfo->ret.size, align);
1576                 }
1577         }
1578
1579         cinfo->offStruct   = sz->stack_size;
1580 //      cinfo->stack_usage = S390_ALIGN(sz->stack_size+sz->local_size,
1581 //                                      S390_STACK_ALIGNMENT);
1582         return (cinfo);
1583 }
1584
1585 /*========================= End of Function ========================*/
1586
1587 /*------------------------------------------------------------------*/
1588 /*                                                                  */
1589 /* Name         - mono_arch_allocate_vars                           */
1590 /*                                                                  */
1591 /* Function     - Set var information according to the calling      */
1592 /*                convention for S/390. The local var stuff should  */
1593 /*                most likely be split in another method.           */
1594 /*                                                                  */
1595 /* Parameter    - @m - Compile unit.                                */
1596 /*                                                                  */
1597 /*------------------------------------------------------------------*/
1598
1599 void
1600 mono_arch_allocate_vars (MonoCompile *cfg)
1601 {
1602         MonoMethodSignature *sig;
1603         MonoMethodHeader *header;
1604         MonoInst *inst;
1605         CallInfo *cinfo;
1606         size_data sz;
1607         int iParm, iVar, offset, size, align, curinst;
1608         int frame_reg = STK_BASE;
1609         int sArg, eArg;
1610
1611         header  = mono_method_get_header (cfg->method);
1612
1613         /*---------------------------------------------------------*/
1614         /* We use the frame register also for any method that has  */
1615         /* filter clauses. This way, when the handlers are called, */
1616         /* the code will reference local variables using the frame */
1617         /* reg instead of the stack pointer: if we had to restore  */
1618         /* the stack pointer, we'd corrupt the method frames that  */
1619         /* are already on the stack (since filters get called      */
1620         /* before stack unwinding happens) when the filter code    */
1621         /* would call any method.                                  */
1622         /*---------------------------------------------------------*/
1623         if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
1624                 frame_reg = s390_r11;
1625
1626         cfg->frame_reg = frame_reg;
1627
1628         if (frame_reg != STK_BASE)
1629                 cfg->used_int_regs |= 1 << frame_reg;
1630
1631         sig     = mono_method_signature (cfg->method);
1632
1633         cinfo   = calculate_sizes (sig, &sz, sig->pinvoke);
1634
1635         if (cinfo->struct_ret) {
1636                 cfg->ret->opcode = OP_REGVAR;
1637                 cfg->ret->inst_c0 = s390_r2;
1638         } else {
1639                 switch (mono_type_get_underlying_type (sig->ret)->type) {
1640                 case MONO_TYPE_VOID:
1641                         break;
1642                 default:
1643                         cfg->ret->opcode = OP_REGVAR;
1644                         cfg->ret->dreg   = s390_r2;
1645                         break;
1646                 }
1647         }
1648
1649         /*--------------------------------------------------------------*/
1650         /* local vars are at a positive offset from the stack pointer   */
1651         /* also note that if the function uses alloca, we use s390_r11  */
1652         /* to point at the local variables.                             */
1653         /* add parameter area size for called functions                 */
1654         /*--------------------------------------------------------------*/
1655         offset          = (cfg->param_area + S390_MINIMAL_STACK_SIZE);
1656         cfg->sig_cookie = 0;
1657
1658         if (cinfo->struct_ret) {
1659                 inst               = cfg->ret;
1660                 offset             = S390_ALIGN(offset, sizeof(gpointer));
1661                 inst->inst_offset  = offset;
1662                 inst->opcode       = OP_REGOFFSET;
1663                 inst->inst_basereg = frame_reg;
1664                 offset            += sizeof(gpointer);
1665                 if ((sig->call_convention == MONO_CALL_VARARG) &&
1666                     (!retFitsInReg (cinfo->ret.size)))
1667                         cfg->sig_cookie += cinfo->ret.size;
1668         }
1669
1670         if (sig->hasthis) {
1671                 inst = cfg->varinfo [0];
1672                 if (inst->opcode != OP_REGVAR) {
1673                         inst->opcode       = OP_REGOFFSET;
1674                         inst->inst_basereg = frame_reg;
1675                         offset             = S390_ALIGN(offset, sizeof(gpointer));
1676                         inst->inst_offset  = offset;
1677                         offset            += sizeof (gpointer);
1678                 }
1679                 curinst = sArg = 1;
1680         } else {
1681                 curinst = sArg = 0;
1682         }
1683
1684         eArg = sig->param_count + sArg;
1685
1686         if (sig->call_convention == MONO_CALL_VARARG)
1687                 cfg->sig_cookie += S390_MINIMAL_STACK_SIZE;
1688
1689         for (iParm = sArg; iParm < eArg; ++iParm) {
1690                 inst = cfg->varinfo [curinst];
1691                 if (inst->opcode != OP_REGVAR) {
1692                         switch (cinfo->args[iParm].regtype) {
1693                                 case RegTypeStructByAddr :
1694                                 if (cinfo->args[iParm].reg == STK_BASE) {
1695                                         inst->opcode       = OP_S390_LOADARG;
1696                                         inst->inst_basereg = frame_reg;
1697                                         size               = abs(cinfo->args[iParm].vtsize);
1698                                         offset             = S390_ALIGN(offset, sizeof(long));
1699                                         inst->inst_offset  = offset;
1700                                 } else {
1701                                         inst->opcode       = OP_S390_ARGREG;
1702                                         inst->inst_basereg = frame_reg;
1703                                         size               = sizeof(gpointer);
1704                                         offset             = S390_ALIGN(offset, size);
1705                                         inst->inst_offset  = offset;
1706                                 }
1707                                         break;
1708                                 case RegTypeStructByVal :
1709                                         inst->opcode       = OP_S390_ARGPTR;
1710                                         inst->inst_basereg = frame_reg;
1711                                         size               = cinfo->args[iParm].size;
1712                                         offset             = S390_ALIGN(offset, size);
1713                                         inst->inst_offset  = offset;
1714                                         break;
1715                                 default :
1716                                 if (cinfo->args[iParm].reg != STK_BASE) {
1717                                         inst->opcode       = OP_REGOFFSET;
1718                                         inst->inst_basereg = frame_reg;
1719                                         size               = (cinfo->args[iParm].size < 8
1720                                                               ? sizeof(long)
1721                                                               : sizeof(long long));
1722                                         offset             = S390_ALIGN(offset, size);
1723                                         inst->inst_offset  = offset;
1724                                 } else {
1725                                         inst->opcode       = OP_S390_STKARG;
1726                                         inst->inst_basereg = frame_reg;
1727                                         size               = (cinfo->args[iParm].size < 4
1728                                                               ? 4 - cinfo->args[iParm].size
1729                                                               : 0);
1730                                         inst->inst_offset  = cinfo->args[iParm].offset +
1731                                                              size;
1732                                         inst->unused       = 0;
1733                                         size               = sizeof(long);
1734                                 }
1735                         }
1736                         if ((sig->call_convention == MONO_CALL_VARARG) &&
1737                             (cinfo->args[iParm].regtype != RegTypeGeneral) &&
1738                             (iParm < sig->sentinelpos))
1739                                 cfg->sig_cookie += size;
1740
1741                         offset += size;
1742                 }
1743                 curinst++;
1744         }
1745
1746         curinst = cfg->locals_start;
1747         for (iVar = curinst; iVar < cfg->num_varinfo; ++iVar) {
1748                 inst = cfg->varinfo [iVar];
1749                 if ((inst->flags & MONO_INST_IS_DEAD) ||
1750                     (inst->opcode == OP_REGVAR))
1751                         continue;
1752
1753                 /*--------------------------------------------------*/
1754                 /* inst->unused indicates native sized value types, */
1755                 /* this is used by the pinvoke wrappers when they   */
1756                 /* call functions returning structure               */
1757                 /*--------------------------------------------------*/
1758                 if (inst->unused && MONO_TYPE_ISSTRUCT (inst->inst_vtype))
1759                         size = mono_class_native_size (mono_class_from_mono_type(inst->inst_vtype), &align);
1760                 else
1761                         size = mono_type_size (inst->inst_vtype, &align);
1762
1763                 offset             = S390_ALIGN(offset, align);
1764                 inst->inst_offset  = offset;
1765                 inst->opcode       = OP_REGOFFSET;
1766                 inst->inst_basereg = frame_reg;
1767                 offset            += size;
1768                 DEBUG (g_print("allocating local %d to %ld\n", iVar, inst->inst_offset));
1769         }
1770
1771         /*------------------------------------------------------*/
1772         /* Allow space for the trace method stack area if needed*/
1773         /*------------------------------------------------------*/
1774         if (mono_jit_trace_calls != NULL && mono_trace_eval (cfg->method))
1775                 offset += S390_TRACE_STACK_SIZE;
1776
1777         /*------------------------------------------------------*/
1778         /* Reserve space to save LMF and caller saved registers */
1779         /*------------------------------------------------------*/
1780         if (cfg->method->save_lmf)
1781                 offset += sizeof (MonoLMF);
1782
1783         /*------------------------------------------------------*/
1784         /* align the offset                                     */
1785         /*------------------------------------------------------*/
1786         cfg->stack_offset = S390_ALIGN(offset, S390_STACK_ALIGNMENT);
1787
1788 }
1789
1790 /*========================= End of Function ========================*/
1791
1792 /*------------------------------------------------------------------*/
1793 /*                                                                  */
1794 /* Name         - mono_arch_call_opcode                             */
1795 /*                                                                  */
1796 /* Function     - Take the arguments and generate the arch-specific */
1797 /*                instructions to properly call the function. This  */
1798 /*                includes pushing, moving argments to the correct  */
1799 /*                etc.                                              */
1800 /*                                                                  */
1801 /*------------------------------------------------------------------*/
1802
1803 MonoCallInst*
1804 mono_arch_call_opcode (MonoCompile *cfg, MonoBasicBlock* bb,
1805                        MonoCallInst *call, int is_virtual) {
1806         MonoInst *in;
1807         MonoCallArgParm *arg;
1808         MonoMethodSignature *sig;
1809         int i, n, lParamArea;
1810         CallInfo *cinfo;
1811         ArgInfo *ainfo;
1812         size_data sz;
1813
1814         sig = call->signature;
1815         n = sig->param_count + sig->hasthis;
1816         DEBUG (g_print ("Call requires: %d parameters\n",n));
1817
1818         cinfo = calculate_sizes (sig, &sz, sig->pinvoke);
1819
1820 //      call->stack_usage = cinfo->stack_usage;
1821 //      lParamArea        = MAX((cinfo->stack_usage - S390_MINIMAL_STACK_SIZE), 0);
1822         call->stack_usage = MAX((sz.stack_size + sz.local_size), call->stack_usage);
1823         lParamArea        = MAX((call->stack_usage - S390_MINIMAL_STACK_SIZE), 0);
1824         cfg->param_area   = MAX (((signed) cfg->param_area), lParamArea);
1825         cfg->flags       |= MONO_CFG_HAS_CALLS;
1826
1827         if (cinfo->struct_ret)
1828                 call->used_iregs |= 1 << cinfo->ret.reg;
1829
1830         for (i = 0; i < n; ++i) {
1831                 ainfo = cinfo->args + i;
1832
1833                 if ((sig->call_convention == MONO_CALL_VARARG) &&
1834                     (i == sig->sentinelpos)) {
1835                         MonoInst *sigArg;
1836
1837                         cfg->disable_aot = TRUE;
1838                         MONO_INST_NEW (cfg, sigArg, OP_ICONST);
1839                         sigArg->inst_p0 = call->signature;
1840
1841                         MONO_INST_NEW_CALL_ARG (cfg, arg, OP_OUTARG_MEMBASE);
1842                         arg->ins.inst_left  = sigArg;
1843                         arg->ins.inst_right = (MonoInst *) call;
1844                         arg->size           = ainfo->size;
1845                         arg->offset         = cinfo->sigCookie.offset;
1846                         call->used_iregs   |= 1 << ainfo->reg;
1847                         arg->ins.next       = call->out_args;
1848                         call->out_args      = (MonoInst *) arg;
1849                 }
1850
1851                 if (is_virtual && i == 0) {
1852                         /* the argument will be attached to the call instrucion */
1853                         in = call->args [i];
1854                         call->used_iregs |= 1 << ainfo->reg;
1855                 } else {
1856                         MONO_INST_NEW_CALL_ARG (cfg, arg, OP_OUTARG);
1857                         in                  = call->args [i];
1858                         arg->ins.cil_code   = in->cil_code;
1859                         arg->ins.inst_left  = in;
1860                         arg->ins.type       = in->type;
1861                         /* prepend, we'll need to reverse them later */
1862                         arg->ins.next       = call->out_args;
1863                         call->out_args      = (MonoInst *) arg;
1864                         arg->ins.inst_right = (MonoInst *) call;
1865                         if (ainfo->regtype == RegTypeGeneral) {
1866                                 arg->ins.unused   = ainfo->reg;
1867                                 call->used_iregs |= 1 << ainfo->reg;
1868                                 if (arg->ins.type == STACK_I8)
1869                                         call->used_iregs |= 1 << (ainfo->reg + 1);
1870                         } else if (ainfo->regtype == RegTypeStructByAddr) {
1871                                 call->used_iregs |= 1 << ainfo->reg;
1872                                 arg->ins.sreg1    = ainfo->reg;
1873                                 arg->ins.opcode   = OP_OUTARG_VT;
1874                                 arg->size         = -ainfo->vtsize;
1875                                 arg->offset       = ainfo->offset;
1876                                 arg->offPrm       = ainfo->offparm + cinfo->offStruct;
1877                         } else if (ainfo->regtype == RegTypeStructByVal) {
1878                                 if (ainfo->reg != STK_BASE) {
1879                                         switch (ainfo->size) {
1880                                         case 0:
1881                                         case 1:
1882                                         case 2:
1883                                         case 4:
1884                                                 call->used_iregs |= 1 << ainfo->reg;
1885                                                 break;
1886                                         case 8:
1887                                                 call->used_iregs |= 1 << ainfo->reg;
1888                                                 call->used_iregs |= 1 << (ainfo->reg+1);
1889                                                 break;
1890                                         default:
1891                                                 call->used_iregs |= 1 << ainfo->reg;
1892                                         }
1893                                 }
1894                                 arg->ins.sreg1  = ainfo->reg;
1895                                 arg->ins.opcode = OP_OUTARG_VT;
1896                                 arg->size       = ainfo->size;
1897                                 arg->offset     = ainfo->offset;
1898                                 arg->offPrm     = ainfo->offparm + cinfo->offStruct;
1899                         } else if (ainfo->regtype == RegTypeBase) {
1900                                 arg->ins.opcode   = OP_OUTARG_MEMBASE;
1901                                 arg->ins.sreg1    = ainfo->reg;
1902                                 arg->size         = ainfo->size;
1903                                 arg->offset       = ainfo->offset;
1904                                 call->used_iregs |= 1 << ainfo->reg;
1905                         } else if (ainfo->regtype == RegTypeFP) {
1906                                 arg->ins.unused   = ainfo->reg;
1907                                 call->used_fregs |= 1 << ainfo->reg;
1908                                 if (ainfo->size == 4)
1909                                         arg->ins.opcode = OP_OUTARG_R4;
1910                                 else
1911                                         arg->ins.opcode = OP_OUTARG_R8;
1912                         } else {
1913                                 g_assert_not_reached ();
1914                         }
1915                 }
1916         }
1917         /*
1918          * Reverse the call->out_args list.
1919          */
1920         {
1921                 MonoInst *prev = NULL, *list = call->out_args, *next;
1922                 while (list) {
1923                         next = list->next;
1924                         list->next = prev;
1925                         prev = list;
1926                         list = next;
1927                 }
1928                 call->out_args = prev;
1929         }
1930
1931         g_free (cinfo);
1932         return call;
1933 }
1934
1935 /*========================= End of Function ========================*/
1936
1937 /*------------------------------------------------------------------*/
1938 /*                                                                  */
1939 /* Name         - mono_arch_instrument_mem_needs                    */
1940 /*                                                                  */
1941 /* Function     - Allow tracing to work with this interface (with   */
1942 /*                an optional argument).                            */
1943 /*                                                                  */
1944 /*------------------------------------------------------------------*/
1945
1946 void
1947 mono_arch_instrument_mem_needs (MonoMethod *method, int *stack, int *code)
1948 {
1949         /* no stack room needed now (may be needed for FASTCALL-trace support) */
1950         *stack = 0;
1951         /* split prolog-epilog requirements? */
1952         *code = 50; /* max bytes needed: check this number */
1953 }
1954
1955 /*========================= End of Function ========================*/
1956
1957 /*------------------------------------------------------------------*/
1958 /*                                                                  */
1959 /* Name         - mono_arch_instrument_prolog                       */
1960 /*                                                                  */
1961 /* Function     - Create an "instrumented" prolog.                  */
1962 /*                                                                  */
1963 /*------------------------------------------------------------------*/
1964
1965 void*
1966 mono_arch_instrument_prolog (MonoCompile *cfg, void *func, void *p,
1967                              gboolean enable_arguments)
1968 {
1969         guchar  *code = p;
1970         int     parmOffset,
1971                 fpOffset;
1972
1973         parmOffset = cfg->stack_usage - S390_TRACE_STACK_SIZE;
1974         if (cfg->method->save_lmf)
1975                 parmOffset -= sizeof(MonoLMF);
1976         fpOffset   = parmOffset + (5*sizeof(gint32));
1977
1978         s390_stm  (code, s390_r2, s390_r6, STK_BASE, parmOffset);
1979         s390_std  (code, s390_f0, 0, STK_BASE, fpOffset);
1980         s390_std  (code, s390_f1, 0, STK_BASE, fpOffset+sizeof(gdouble));
1981         s390_std  (code, s390_f2, 0, STK_BASE, fpOffset+2*sizeof(gdouble));
1982         s390_basr (code, s390_r13, 0);
1983         s390_j    (code, 6);
1984         s390_word (code, cfg->method);
1985         s390_word (code, func);
1986         s390_l    (code, s390_r2, 0, s390_r13, 4);
1987         s390_la   (code, s390_r3, 0, STK_BASE, parmOffset);
1988         s390_lr   (code, s390_r4, STK_BASE);
1989         s390_ahi  (code, s390_r4, cfg->stack_usage);
1990         s390_l    (code, s390_r1, 0, s390_r13, 8);
1991         s390_basr (code, s390_r14, s390_r1);
1992         s390_ld   (code, s390_f2, 0, STK_BASE, fpOffset+2*sizeof(gdouble));
1993         s390_ld   (code, s390_f1, 0, STK_BASE, fpOffset+sizeof(gdouble));
1994         s390_ld   (code, s390_f0, 0, STK_BASE, fpOffset);
1995         s390_lm   (code, s390_r2, s390_r6, STK_BASE, parmOffset);
1996
1997         return code;
1998 }
1999
2000 /*========================= End of Function ========================*/
2001
2002 /*------------------------------------------------------------------*/
2003 /*                                                                  */
2004 /* Name         - mono_arch_instrument_epilog                       */
2005 /*                                                                  */
2006 /* Function     - Create an epilog that will handle the returned    */
2007 /*                values used in instrumentation.                   */
2008 /*                                                                  */
2009 /*------------------------------------------------------------------*/
2010
2011 void*
2012 mono_arch_instrument_epilog (MonoCompile *cfg, void *func, void *p, gboolean enable_arguments)
2013 {
2014         guchar     *code = p;
2015         int        save_mode = SAVE_NONE,
2016                    saveOffset;
2017         MonoMethod *method = cfg->method;
2018         int        rtype = mono_type_get_underlying_type (mono_method_signature (method)->ret)->type;
2019
2020         saveOffset = cfg->stack_usage - S390_TRACE_STACK_SIZE;
2021         if (method->save_lmf)
2022                 saveOffset -= sizeof(MonoLMF);
2023
2024 handle_enum:
2025         switch (rtype) {
2026         case MONO_TYPE_VOID:
2027                 /* special case string .ctor icall */
2028                 if (strcmp (".ctor", method->name) && method->klass == mono_defaults.string_class)
2029                         save_mode = SAVE_ONE;
2030                 else
2031                         save_mode = SAVE_NONE;
2032                 break;
2033         case MONO_TYPE_I8:
2034         case MONO_TYPE_U8:
2035                 save_mode = SAVE_TWO;
2036                 break;
2037         case MONO_TYPE_R4:
2038         case MONO_TYPE_R8:
2039                 save_mode = SAVE_FP;
2040                 break;
2041         case MONO_TYPE_VALUETYPE:
2042                 if (mono_method_signature (method)->ret->data.klass->enumtype) {
2043                         rtype = mono_method_signature (method)->ret->data.klass->enum_basetype->type;
2044                         goto handle_enum;
2045                 }
2046                 save_mode = SAVE_STRUCT;
2047                 break;
2048         default:
2049                 save_mode = SAVE_ONE;
2050                 break;
2051         }
2052
2053         switch (save_mode) {
2054         case SAVE_TWO:
2055                 s390_stm (code, s390_r2, s390_r3, cfg->frame_reg, saveOffset);
2056                 if (enable_arguments) {
2057                         s390_lr (code, s390_r4, s390_r3);
2058                         s390_lr (code, s390_r3, s390_r2);
2059                 }
2060                 break;
2061         case SAVE_ONE:
2062                 s390_st (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2063                 if (enable_arguments) {
2064                         s390_lr (code, s390_r3, s390_r2);
2065                 }
2066                 break;
2067         case SAVE_FP:
2068                 s390_std (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2069                 if (enable_arguments) {
2070                         /* FIXME: what reg?  */
2071                         s390_ldr (code, s390_f2, s390_f0);
2072                         s390_lm  (code, s390_r3, s390_r4, cfg->frame_reg, saveOffset);
2073                 }
2074                 break;
2075         case SAVE_STRUCT:
2076                 s390_st (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2077                 if (enable_arguments) {
2078                         s390_l (code, s390_r3, 0, cfg->frame_reg,
2079                                 S390_MINIMAL_STACK_SIZE+cfg->param_area);
2080                 }
2081                 break;
2082         case SAVE_NONE:
2083         default:
2084                 break;
2085         }
2086
2087         s390_basr (code, s390_r13, 0);
2088         s390_j    (code, 6);
2089         s390_word (code, cfg->method);
2090         s390_word (code, func);
2091         s390_l    (code, s390_r2, 0, s390_r13, 4);
2092         s390_l    (code, s390_r1, 0, s390_r13, 8);
2093         s390_basr (code, s390_r14, s390_r1);
2094
2095         switch (save_mode) {
2096         case SAVE_TWO:
2097                 s390_lm  (code, s390_r2, s390_r3, cfg->frame_reg, saveOffset);
2098                 break;
2099         case SAVE_ONE:
2100                 s390_l   (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2101                 break;
2102         case SAVE_FP:
2103                 s390_ld  (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2104                 break;
2105         case SAVE_STRUCT:
2106                 s390_l   (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2107                 break;
2108         case SAVE_NONE:
2109         default:
2110                 break;
2111         }
2112
2113         return code;
2114 }
2115
2116 /*========================= End of Function ========================*/
2117
2118 /*------------------------------------------------------------------*/
2119 /*                                                                  */
2120 /* Name         - peephole_pass                                     */
2121 /*                                                                  */
2122 /* Function     - Form a peephole pass at the code looking for      */
2123 /*                simple optimizations.                             */
2124 /*                                                                  */
2125 /*------------------------------------------------------------------*/
2126
2127 static void
2128 peephole_pass (MonoCompile *cfg, MonoBasicBlock *bb)
2129 {
2130         MonoInst *ins, *last_ins = NULL;
2131         ins = bb->code;
2132
2133         while (ins) {
2134
2135                 switch (ins->opcode) {
2136                 case OP_MUL_IMM:
2137                         /* remove unnecessary multiplication with 1 */
2138                         if (ins->inst_imm == 1) {
2139                                 if (ins->dreg != ins->sreg1) {
2140                                         ins->opcode = OP_MOVE;
2141                                 } else {
2142                                         last_ins->next = ins->next;
2143                                         ins = ins->next;
2144                                         continue;
2145                                 }
2146                         }
2147                         break;
2148                 case OP_LOAD_MEMBASE:
2149                 case OP_LOADI4_MEMBASE:
2150                         /*
2151                          * OP_STORE_MEMBASE_REG reg, offset(basereg)
2152                          * OP_LOAD_MEMBASE offset(basereg), reg
2153                          */
2154                         if (last_ins && (last_ins->opcode == OP_STOREI4_MEMBASE_REG
2155                                          || last_ins->opcode == OP_STORE_MEMBASE_REG) &&
2156                             ins->inst_basereg == last_ins->inst_destbasereg &&
2157                             ins->inst_offset == last_ins->inst_offset) {
2158                                 if (ins->dreg == last_ins->sreg1) {
2159                                         last_ins->next = ins->next;
2160                                         ins = ins->next;
2161                                         continue;
2162                                 } else {
2163                                         ins->opcode = OP_MOVE;
2164                                         ins->sreg1 = last_ins->sreg1;
2165                                 }
2166
2167                         /*
2168                          * Note: reg1 must be different from the basereg in the second load
2169                          * OP_LOAD_MEMBASE offset(basereg), reg1
2170                          * OP_LOAD_MEMBASE offset(basereg), reg2
2171                          * -->
2172                          * OP_LOAD_MEMBASE offset(basereg), reg1
2173                          * OP_MOVE reg1, reg2
2174                          */
2175                         } if (last_ins && (last_ins->opcode == OP_LOADI4_MEMBASE
2176                                            || last_ins->opcode == OP_LOAD_MEMBASE) &&
2177                               ins->inst_basereg != last_ins->dreg &&
2178                               ins->inst_basereg == last_ins->inst_basereg &&
2179                               ins->inst_offset == last_ins->inst_offset) {
2180
2181                                 if (ins->dreg == last_ins->dreg) {
2182                                         last_ins->next = ins->next;
2183                                         ins = ins->next;
2184                                         continue;
2185                                 } else {
2186                                         ins->opcode = OP_MOVE;
2187                                         ins->sreg1 = last_ins->dreg;
2188                                 }
2189
2190                                 //g_assert_not_reached ();
2191
2192 #if 0
2193                         /*
2194                          * OP_STORE_MEMBASE_IMM imm, offset(basereg)
2195                          * OP_LOAD_MEMBASE offset(basereg), reg
2196                          * -->
2197                          * OP_STORE_MEMBASE_IMM imm, offset(basereg)
2198                          * OP_ICONST reg, imm
2199                          */
2200                         } else if (last_ins && (last_ins->opcode == OP_STOREI4_MEMBASE_IMM
2201                                                 || last_ins->opcode == OP_STORE_MEMBASE_IMM) &&
2202                                    ins->inst_basereg == last_ins->inst_destbasereg &&
2203                                    ins->inst_offset == last_ins->inst_offset) {
2204                                 //static int c = 0; printf ("MATCHX %s %d\n", cfg->method->name,c++);
2205                                 ins->opcode = OP_ICONST;
2206                                 ins->inst_c0 = last_ins->inst_imm;
2207                                 g_assert_not_reached (); // check this rule
2208 #endif
2209                         }
2210                         break;
2211                 case OP_LOADU1_MEMBASE:
2212                 case OP_LOADI1_MEMBASE:
2213                         if (last_ins && (last_ins->opcode == OP_STOREI1_MEMBASE_REG) &&
2214                                         ins->inst_basereg == last_ins->inst_destbasereg &&
2215                                         ins->inst_offset == last_ins->inst_offset) {
2216                                 if (ins->dreg == last_ins->sreg1) {
2217                                         last_ins->next = ins->next;
2218                                         ins = ins->next;
2219                                         continue;
2220                                 } else {
2221                                         //static int c = 0; printf ("MATCHX %s %d\n", cfg->method->name,c++);
2222                                         ins->opcode = OP_MOVE;
2223                                         ins->sreg1 = last_ins->sreg1;
2224                                 }
2225                         }
2226                         break;
2227                 case OP_LOADU2_MEMBASE:
2228                 case OP_LOADI2_MEMBASE:
2229                         if (last_ins && (last_ins->opcode == OP_STOREI2_MEMBASE_REG) &&
2230                                         ins->inst_basereg == last_ins->inst_destbasereg &&
2231                                         ins->inst_offset == last_ins->inst_offset) {
2232                                 if (ins->dreg == last_ins->sreg1) {
2233                                         last_ins->next = ins->next;
2234                                         ins = ins->next;
2235                                         continue;
2236                                 } else {
2237                                         ins->opcode = OP_MOVE;
2238                                         ins->sreg1 = last_ins->sreg1;
2239                                 }
2240                         }
2241                         break;
2242                 case CEE_CONV_I4:
2243                 case CEE_CONV_U4:
2244                 case OP_MOVE:
2245                         /*
2246                          * OP_MOVE reg, reg
2247                          */
2248                         if (ins->dreg == ins->sreg1) {
2249                                 if (last_ins)
2250                                         last_ins->next = ins->next;
2251                                 ins = ins->next;
2252                                 continue;
2253                         }
2254                         /*
2255                          * OP_MOVE sreg, dreg
2256                          * OP_MOVE dreg, sreg
2257                          */
2258                         if (last_ins && last_ins->opcode == OP_MOVE &&
2259                             ins->sreg1 == last_ins->dreg &&
2260                             ins->dreg == last_ins->sreg1) {
2261                                 last_ins->next = ins->next;
2262                                 ins = ins->next;
2263                                 continue;
2264                         }
2265                         break;
2266                 }
2267                 last_ins = ins;
2268                 ins = ins->next;
2269         }
2270         bb->last_ins = last_ins;
2271 }
2272
2273 /*========================= End of Function ========================*/
2274
2275 /*------------------------------------------------------------------*/
2276 /*                                                                  */
2277 /* Name         - mono_arch_local_regalloc.                         */
2278 /*                                                                  */
2279 /* Function     - We first scan the list of instructions and we     */
2280 /*                save the liveness information of each register    */
2281 /*                (when the register is first used, when its value  */
2282 /*                is set etc.). We also reverse the list of instr-  */
2283 /*                uctions (in the InstList list) because assigning  */
2284 /*                registers backwards allows for more tricks to be  */
2285 /*                used.                                             */
2286 /*                                                                  */
2287 /*------------------------------------------------------------------*/
2288
2289 void
2290 mono_arch_local_regalloc (MonoCompile *cfg, MonoBasicBlock *bb)
2291 {
2292         mono_local_regalloc(cfg, bb);
2293 }
2294
2295 /*========================= End of Function ========================*/
2296
2297 /*------------------------------------------------------------------*/
2298 /*                                                                  */
2299 /* Name         - emit_float_to_int                                 */
2300 /*                                                                  */
2301 /* Function     - Create instructions which will convert a floating */
2302 /*                point value to integer.                           */
2303 /*                                                                  */
2304 /*------------------------------------------------------------------*/
2305
2306 static guchar*
2307 emit_float_to_int (MonoCompile *cfg, guchar *code, int dreg, int sreg, int size, gboolean is_signed)
2308 {
2309         /* sreg is a float, dreg is an integer reg. */
2310         if (is_signed) {
2311                 s390_cfdbr (code, dreg, 5, sreg);
2312                 switch (size) {
2313                         case 1:
2314                                 s390_lhi  (code, s390_r0, 0);
2315                                 s390_lhi  (code, s390_r13, 0xff);
2316                                 s390_ltr  (code, dreg, dreg);
2317                                 s390_jnl  (code, 4);
2318                                 s390_lhi  (code, s390_r0, 0x80);
2319                                 s390_nr   (code, dreg, s390_r13);
2320                                 s390_or   (code, dreg, s390_r0);
2321                                 break;
2322                 }
2323         } else {
2324                 s390_basr   (code, s390_r13, 0);
2325                 s390_j      (code, 10);
2326                 s390_llong  (code, 0x41e0000000000000);
2327                 s390_llong  (code, 0x41f0000000000000);
2328                 s390_ldr    (code, s390_f15, sreg);
2329                 s390_cdb    (code, s390_f15, 0, s390_r13, 0);
2330                 s390_jl     (code, 10);
2331                 s390_sdb    (code, s390_f15, 0, s390_r13, 8);
2332                 s390_cfdbr  (code, dreg, 7, s390_f15);
2333                 s390_j      (code, 4);
2334                 s390_cfdbr  (code, dreg, 5, sreg);
2335                 switch (size) {
2336                         case 1:
2337                                 s390_lhi  (code, s390_r0, 0xff);
2338                                 s390_nr   (code, dreg, s390_r0);
2339                                 break;
2340                         case 2:
2341                                 s390_lhi  (code, s390_r0, -1);
2342                                 s390_srl  (code, s390_r0, 0, 16);
2343                                 s390_nr   (code, dreg, s390_r0);
2344                                 break;
2345                 }
2346         }
2347         return code;
2348 }
2349
2350 /*========================= End of Function ========================*/
2351
2352 /*------------------------------------------------------------------*/
2353 /*                                                                  */
2354 /* Name         - mono_arch_output_basic_block                      */
2355 /*                                                                  */
2356 /* Function     - Perform the "real" work of emitting instructions  */
2357 /*                that will do the work of in the basic block.      */
2358 /*                                                                  */
2359 /*------------------------------------------------------------------*/
2360
2361 void
2362 mono_arch_output_basic_block (MonoCompile *cfg, MonoBasicBlock *bb)
2363 {
2364         MonoInst *ins;
2365         MonoCallInst *call;
2366         guint offset;
2367         guint8 *code = cfg->native_code + cfg->code_len;
2368         MonoInst *last_ins = NULL;
2369         guint last_offset = 0;
2370         int max_len, cpos, src2;
2371
2372         if (cfg->opt & MONO_OPT_PEEPHOLE)
2373                 peephole_pass (cfg, bb);
2374
2375         /* we don't align basic blocks of loops on s390 */
2376
2377         if (cfg->verbose_level > 2)
2378                 g_print ("Basic block %d starting at offset 0x%x\n", bb->block_num, bb->native_offset);
2379
2380         cpos = bb->max_offset;
2381
2382         if (cfg->prof_options & MONO_PROFILE_COVERAGE) {
2383                 //MonoCoverageInfo *cov = mono_get_coverage_info (cfg->method);
2384                 //g_assert (!mono_compile_aot);
2385                 //cpos += 6;
2386                 //if (bb->cil_code)
2387                 //      cov->data [bb->dfn].iloffset = bb->cil_code - cfg->cil_code;
2388                 /* this is not thread save, but good enough */
2389                 /* fixme: howto handle overflows? */
2390                 //x86_inc_mem (code, &cov->data [bb->dfn].count);
2391         }
2392
2393         ins = bb->code;
2394         while (ins) {
2395                 offset = code - cfg->native_code;
2396
2397                 max_len = ((guint8 *)ins_spec [ins->opcode])[MONO_INST_LEN];
2398
2399                 if (offset > (cfg->code_size - max_len - 16)) {
2400                         cfg->code_size *= 2;
2401                         cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
2402                         code = cfg->native_code + offset;
2403                 }
2404
2405                 mono_debug_record_line_number (cfg, ins, offset);
2406
2407                 switch (ins->opcode) {
2408                 case OP_STOREI1_MEMBASE_IMM: {
2409                         s390_lhi (code, s390_r0, ins->inst_imm);
2410                         if (s390_is_uimm12(ins->inst_offset))
2411                                 s390_stc (code, s390_r0, 0, ins->inst_destbasereg, ins->inst_offset);
2412                         else {
2413                                 s390_basr (code, s390_r13, 0);
2414                                 s390_j    (code, 4);
2415                                 s390_word (code, ins->inst_offset);
2416                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2417                                 s390_stc  (code, s390_r0, s390_r13, ins->inst_destbasereg, 0);
2418                         }
2419                 }
2420                         break;
2421                 case OP_STOREI2_MEMBASE_IMM: {
2422                         s390_lhi (code, s390_r0, ins->inst_imm);
2423                         if (s390_is_uimm12(ins->inst_offset)) {
2424                                 s390_sth (code, s390_r0, 0, ins->inst_destbasereg, ins->inst_offset);
2425                         } else {
2426                                 s390_basr (code, s390_r13, 0);
2427                                 s390_j    (code, 4);
2428                                 s390_word (code, ins->inst_offset);
2429                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2430                                 s390_sth  (code, s390_r0, s390_r13, ins->inst_destbasereg, 0);
2431                         }
2432                 }
2433                         break;
2434                 case OP_STORE_MEMBASE_IMM:
2435                 case OP_STOREI4_MEMBASE_IMM: {
2436                         if (s390_is_imm16(ins->inst_imm)) {
2437                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2438                         } else {
2439                                 s390_basr (code, s390_r13, 0);
2440                                 s390_j    (code, 4);
2441                                 s390_word (code, ins->inst_imm);
2442                                 s390_l    (code, s390_r0, 0, s390_r13, 4);
2443                         }
2444                         if (s390_is_uimm12(ins->inst_offset)) {
2445                                 s390_st  (code, s390_r0, 0, ins->inst_destbasereg, ins->inst_offset);
2446                         } else {
2447                                 s390_basr (code, s390_r13, 0);
2448                                 s390_j    (code, 4);
2449                                 s390_word (code, ins->inst_offset);
2450                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2451                                 s390_st   (code, s390_r0, s390_r13, ins->inst_destbasereg, 0);
2452                         }
2453                 }
2454                         break;
2455                 case OP_STOREI1_MEMBASE_REG: {
2456                         if (s390_is_uimm12(ins->inst_offset)) {
2457                                 s390_stc  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
2458                         } else {
2459                                 s390_basr (code, s390_r13, 0);
2460                                 s390_j    (code, 4);
2461                                 s390_word (code, ins->inst_offset);
2462                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2463                                 s390_stc  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
2464                         }
2465                 }
2466                         break;
2467                 case OP_STOREI2_MEMBASE_REG: {
2468                         if (s390_is_uimm12(ins->inst_offset)) {
2469                                 s390_sth  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
2470                         } else {
2471                                 s390_basr (code, s390_r13, 0);
2472                                 s390_j    (code, 4);
2473                                 s390_word (code, ins->inst_offset);
2474                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2475                                 s390_sth  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
2476                         }
2477                 }
2478                         break;
2479                 case OP_STORE_MEMBASE_REG:
2480                 case OP_STOREI4_MEMBASE_REG: {
2481                         if (s390_is_uimm12(ins->inst_offset)) {
2482                                 s390_st   (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
2483                         } else {
2484                                 s390_basr (code, s390_r13, 0);
2485                                 s390_j    (code, 4);
2486                                 s390_word (code, ins->inst_offset);
2487                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2488                                 s390_st   (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
2489                         }
2490                 }
2491                         break;
2492                 case CEE_LDIND_I:
2493                 case CEE_LDIND_I4:
2494                 case CEE_LDIND_U4: {
2495                         s390_basr (code, s390_r13, 0);
2496                         s390_j    (code, 4);
2497                         s390_word (code, ins->inst_p0);
2498                         s390_l    (code, s390_r13, 0, s390_r13, 4);
2499                         s390_l    (code, ins->dreg, 0, s390_r13, 0);
2500                 }
2501                         break;
2502                 case OP_LOADU4_MEM:
2503                         g_assert_not_reached ();
2504                         break;
2505                 case OP_LOAD_MEMBASE:
2506                 case OP_LOADI4_MEMBASE:
2507                 case OP_LOADU4_MEMBASE: {
2508                         if (s390_is_uimm12(ins->inst_offset))
2509                                 s390_l    (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
2510                         else {
2511                                 if (s390_is_imm16(ins->inst_offset)) {
2512                                         s390_lhi (code, s390_r13, ins->inst_offset);
2513                                         s390_l   (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
2514                                 } else {
2515                                         s390_basr (code, s390_r13, 0);
2516                                         s390_j    (code, 4);
2517                                         s390_word (code, ins->inst_offset);
2518                                         s390_l    (code, s390_r13, 0, s390_r13, 4);
2519                                         s390_l    (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
2520                                 }
2521                         }
2522                 }
2523                         break;
2524                 case OP_LOADU1_MEMBASE: {
2525                         s390_lhi (code, s390_r0, 0);
2526                         if (s390_is_uimm12(ins->inst_offset))
2527                                 s390_ic   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
2528                         else {
2529                                 s390_basr (code, s390_r13, 0);
2530                                 s390_j    (code, 4);
2531                                 s390_word (code, ins->inst_offset);
2532                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2533                                 s390_ic   (code, s390_r0, s390_r13, ins->inst_basereg, 0);
2534                         }
2535                         s390_lr   (code, ins->dreg, s390_r0);
2536                 }
2537                         break;
2538                 case OP_LOADI1_MEMBASE: {
2539                         s390_lhi (code, s390_r0, 0);
2540                         if (s390_is_uimm12(ins->inst_offset))
2541                                 s390_ic   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
2542                         else {
2543                                 s390_basr (code, s390_r13, 0);
2544                                 s390_j    (code, 4);
2545                                 s390_word (code, ins->inst_offset);
2546                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2547                                 s390_ic   (code, s390_r0, s390_r13, ins->inst_basereg, 0);
2548                         }
2549                         s390_lhi  (code, s390_r13, 0x80);
2550                         s390_nr   (code, s390_r13, s390_r0);
2551                         s390_jz   (code, 5);
2552                         s390_lhi  (code, s390_r13, 0xff00);
2553                         s390_or   (code, s390_r0, s390_r13);
2554                         s390_lr   (code, ins->dreg, s390_r0);
2555                 }
2556                         break;
2557                 case OP_LOADU2_MEMBASE: {
2558                         s390_lhi (code, s390_r0, 0);
2559                         if (s390_is_uimm12(ins->inst_offset))
2560                                 s390_icm  (code, s390_r0, 3, ins->inst_basereg, ins->inst_offset);
2561                         else {
2562                                 s390_basr (code, s390_r13, 0);
2563                                 s390_j    (code, 4);
2564                                 s390_word (code, ins->inst_offset);
2565                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2566                                 s390_ar   (code, s390_r13, ins->inst_basereg);
2567                                 s390_icm  (code, s390_r0, 3, s390_r13, 0);
2568                         }
2569                         s390_lr  (code, ins->dreg, s390_r0);
2570                 }
2571                         break;
2572                 case OP_LOADI2_MEMBASE: {
2573                         s390_lhi (code, s390_r0, 0);
2574                         if (s390_is_uimm12(ins->inst_offset))
2575                                 s390_lh   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
2576                         else {
2577                                 s390_basr (code, s390_r13, 0);
2578                                 s390_j    (code, 4);
2579                                 s390_word (code, ins->inst_offset);
2580                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2581                                 s390_lh   (code, s390_r0, s390_r13, ins->inst_basereg, 0);
2582                         }
2583                         s390_lr  (code, ins->dreg, s390_r0);
2584                 }
2585                         break;
2586                 case CEE_CONV_I1: {
2587                         s390_lhi  (code, s390_r0, 0x80);
2588                         if (ins->dreg != ins->sreg1) {
2589                                 s390_lr   (code, ins->dreg, ins->sreg1);
2590                         }
2591                         s390_nr   (code, s390_r0, ins->sreg1);
2592                         s390_jz   (code, 7);
2593                         s390_lhi  (code, s390_r13, -1);
2594                         s390_sll  (code, s390_r13, 0, 8);
2595                         s390_or   (code, ins->dreg, s390_r13);
2596                 }
2597                         break;
2598                 case CEE_CONV_I2: {
2599                         s390_lhi  (code, s390_r0, 0x80);
2600                         s390_sll  (code, s390_r0, 0, 8);
2601                         if (ins->dreg != ins->sreg1) {
2602                                 s390_lr   (code, ins->dreg, ins->sreg1);
2603                         }
2604                         s390_nr   (code, s390_r0, ins->sreg1);
2605                         s390_jz   (code, 7);
2606                         s390_lhi  (code, s390_r13, -1);
2607                         s390_sll  (code, s390_r13, 0, 16);
2608                         s390_or   (code, ins->dreg, s390_r13);
2609                 }
2610                         break;
2611                 case CEE_CONV_U1: {
2612                         s390_lhi  (code, s390_r0, 0xff);
2613                         if (ins->dreg != ins->sreg1) {
2614                                 s390_lr   (code, ins->dreg, ins->sreg1);
2615                         }
2616                         s390_nr   (code, ins->dreg, s390_r0);
2617                 }
2618                         break;
2619                 case CEE_CONV_U2: {
2620                         s390_lhi  (code, s390_r0, -1);
2621                         s390_sll  (code, s390_r0, 0, 16);
2622                         s390_srl  (code, s390_r0, 0, 16);
2623                         if (ins->dreg != ins->sreg1) {
2624                                 s390_lr   (code, ins->dreg, ins->sreg1);
2625                         }
2626                         s390_nr   (code, ins->dreg, s390_r0);
2627                 }
2628                         break;
2629                 case OP_COMPARE: {
2630                         if ((ins->next) &&
2631                             (((ins->next->opcode >= CEE_BNE_UN) &&
2632                               (ins->next->opcode <= CEE_BLT_UN)) ||
2633                              ((ins->next->opcode >= OP_COND_EXC_NE_UN) &&
2634                               (ins->next->opcode <= OP_COND_EXC_LT_UN)) ||
2635                              ((ins->next->opcode == OP_CLT_UN) ||
2636                               (ins->next->opcode == OP_CGT_UN))))
2637                                 s390_clr  (code, ins->sreg1, ins->sreg2);
2638                         else
2639                                 s390_cr   (code, ins->sreg1, ins->sreg2);
2640                 }
2641                         break;
2642                 case OP_COMPARE_IMM: {
2643                         if (s390_is_imm16 (ins->inst_imm)) {
2644                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2645                                 if ((ins->next) &&
2646                                     (((ins->next->opcode >= CEE_BNE_UN) &&
2647                                       (ins->next->opcode <= CEE_BLT_UN)) ||
2648                                      ((ins->next->opcode >= OP_COND_EXC_NE_UN) &&
2649                                       (ins->next->opcode <= OP_COND_EXC_LT_UN)) ||
2650                                      ((ins->next->opcode == OP_CLT_UN) ||
2651                                       (ins->next->opcode == OP_CGT_UN))))
2652                                         s390_clr  (code, ins->sreg1, s390_r0);
2653                                 else
2654                                         s390_cr   (code, ins->sreg1, s390_r0);
2655                         }
2656                         else {
2657                                 s390_basr (code, s390_r13, 0);
2658                                 s390_j    (code, 4);
2659                                 s390_word (code, ins->inst_imm);
2660                                 if ((ins->next) &&
2661                                     (((ins->next->opcode >= CEE_BNE_UN) &&
2662                                       (ins->next->opcode <= CEE_BLT_UN)) ||
2663                                      ((ins->next->opcode >= OP_COND_EXC_NE_UN) &&
2664                                       (ins->next->opcode <= OP_COND_EXC_LT_UN)) ||
2665                                      ((ins->next->opcode == OP_CLT_UN) ||
2666                                       (ins->next->opcode == OP_CGT_UN))))
2667                                         s390_cl   (code, ins->sreg1, 0, s390_r13, 4);
2668                                 else
2669                                         s390_c    (code, ins->sreg1, 0, s390_r13, 4);
2670                         }
2671                 }
2672                         break;
2673                 case OP_X86_TEST_NULL: {
2674                         s390_ltr (code, ins->sreg1, ins->sreg1);
2675                 }
2676                         break;
2677                 case CEE_BREAK: {
2678                         mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS, mono_arch_break);
2679                         s390_brasl (code, s390_r14, 0);
2680                 }
2681                         break;
2682                 case OP_ADDCC: {
2683                         CHECK_SRCDST_COM;
2684                         s390_alr  (code, ins->dreg, src2);
2685                 }
2686                         break;
2687                 case CEE_ADD: {
2688                         CHECK_SRCDST_COM;
2689                         s390_ar   (code, ins->dreg, src2);
2690                 }
2691                         break;
2692                 case OP_ADC: {
2693                         CHECK_SRCDST_COM;
2694                         s390_alcr (code, ins->dreg, src2);
2695                 }
2696                         break;
2697                 case OP_ADD_IMM: {
2698                         if ((ins->next) &&
2699                             (ins->next->opcode == OP_ADC_IMM)) {
2700                                 s390_basr (code, s390_r13, 0);
2701                                 s390_j    (code, 4);
2702                                 s390_word (code, ins->inst_imm);
2703                                 if (ins->dreg != ins->sreg1) {
2704                                         s390_lr   (code, ins->dreg, ins->sreg1);
2705                                 }
2706                                 s390_a (code, ins->dreg, 0, s390_r13, 4);
2707                         } else {
2708                                 if (s390_is_imm16 (ins->inst_imm)) {
2709                                         if (ins->dreg != ins->sreg1) {
2710                                                 s390_lr   (code, ins->dreg, ins->sreg1);
2711                                         }
2712                                         s390_ahi  (code, ins->dreg, ins->inst_imm);
2713                                 } else {
2714                                         s390_basr (code, s390_r13, 0);
2715                                         s390_j    (code, 4);
2716                                         s390_word (code, ins->inst_imm);
2717                                         if (ins->dreg != ins->sreg1) {
2718                                                 s390_lr   (code, ins->dreg, ins->sreg1);
2719                                         }
2720                                         s390_a (code, ins->dreg, 0, s390_r13, 4);
2721                                 }
2722                         }
2723                 }
2724                         break;
2725                 case OP_ADDCC_IMM: {
2726                         if ((ins->next) &&
2727                             (ins->next->opcode == OP_ADC_IMM)) {
2728                                 s390_basr (code, s390_r13, 0);
2729                                 s390_j    (code, 4);
2730                                 s390_word (code, ins->inst_imm);
2731                                 if (ins->dreg != ins->sreg1) {
2732                                         s390_lr   (code, ins->dreg, ins->sreg1);
2733                                 }
2734                                 s390_al   (code, ins->dreg, 0, s390_r13, 4);
2735                         } else {
2736                                 if (s390_is_imm16 (ins->inst_imm)) {
2737                                         if (ins->dreg != ins->sreg1) {
2738                                                 s390_lr   (code, ins->dreg, ins->sreg1);
2739                                         }
2740                                         s390_lhi  (code, s390_r0, ins->inst_imm);
2741                                         s390_alcr (code, ins->dreg, s390_r0);
2742                                 } else {
2743                                         s390_basr (code, s390_r13, 0);
2744                                         s390_j    (code, 4);
2745                                         s390_word (code, ins->inst_imm);
2746                                         if (ins->dreg != ins->sreg1) {
2747                                                 s390_lr   (code, ins->dreg, ins->sreg1);
2748                                         }
2749                                         s390_al   (code, ins->dreg, 0, s390_r13, 4);
2750                                 }
2751                         }
2752                 }
2753                         break;
2754                 case OP_ADC_IMM: {
2755                         if (s390_is_imm16 (ins->inst_imm)) {
2756                                 if (ins->dreg != ins->sreg1) {
2757                                         s390_lr   (code, ins->dreg, ins->sreg1);
2758                                 }
2759                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2760                                 s390_alcr (code, ins->dreg, s390_r0);
2761                         } else {
2762                                 s390_basr (code, s390_r13, 0);
2763                                 s390_j    (code, 4);
2764                                 s390_word (code, ins->inst_imm);
2765                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2766                                 s390_alcr (code, ins->dreg, s390_r13);
2767                         }
2768                 }
2769                         break;
2770                 case CEE_ADD_OVF: {
2771                         CHECK_SRCDST_COM;
2772                         s390_ar   (code, ins->dreg, src2);
2773                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2774                 }
2775                         break;
2776                 case CEE_ADD_OVF_UN: {
2777                         CHECK_SRCDST_COM;
2778                         s390_alr  (code, ins->dreg, src2);
2779                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
2780                 }
2781                         break;
2782                 case OP_LADD_OVF: {
2783                         short int *o[1];
2784                         CHECK_SRCDST_COM;
2785                         s390_alr  (code, ins->dreg, src2);
2786                         s390_jnc  (code, 0); CODEPTR(code, o[0]);
2787                         s390_ahi  (code, ins->dreg+1, 1);
2788                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2789                         PTRSLOT   (code, o[0]);
2790                         s390_ar   (code, ins->dreg+1, src2+1);
2791                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2792                 }
2793                         break;
2794                 case OP_LADD_OVF_UN: {
2795                         CHECK_SRCDST_COM;
2796                         s390_alr  (code, ins->dreg, src2);
2797                         s390_alcr (code, ins->dreg+1, src2+1);
2798                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
2799                 }
2800                         break;
2801                 case OP_ADD_OVF_CARRY: {
2802                         CHECK_SRCDST_COM;
2803                         s390_lhi  (code, s390_r0, 0);
2804                         s390_lr   (code, s390_r1, s390_r0);
2805                         s390_alcr (code, s390_r0, s390_r1);
2806                         s390_ar   (code, ins->dreg, src2);
2807                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2808                         s390_ar   (code, ins->dreg, s390_r0);
2809                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2810                 }
2811                         break;
2812                 case OP_ADD_OVF_UN_CARRY: {
2813                         CHECK_SRCDST_COM;
2814                         s390_alcr (code, ins->dreg, src2);
2815                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
2816                 }
2817                         break;
2818                 case OP_SUBCC: {
2819                         CHECK_SRCDST_NCOM;
2820                         s390_slr (code, ins->dreg, src2);
2821                 }
2822                         break;
2823                 case CEE_SUB: {
2824                         CHECK_SRCDST_NCOM;
2825                         s390_sr   (code, ins->dreg, src2);
2826                 }
2827                         break;
2828                 case OP_SBB: {
2829                         CHECK_SRCDST_NCOM;
2830                         s390_slbr (code, ins->dreg, src2);
2831                 }
2832                         break;
2833                 case OP_SUBCC_IMM: {
2834                         if (s390_is_imm16 (-ins->inst_imm)) {
2835                                 if (ins->dreg != ins->sreg1) {
2836                                         s390_lr   (code, ins->dreg, ins->sreg1);
2837                                 }
2838                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2839                                 s390_slr  (code, ins->dreg, s390_r0);
2840                         } else {
2841                                 s390_basr (code, s390_r13, 0);
2842                                 s390_j    (code, 4);
2843                                 s390_word (code, ins->inst_imm);
2844                                 if (ins->dreg != ins->sreg1) {
2845                                         s390_lr   (code, ins->dreg, ins->sreg1);
2846                                 }
2847                                 s390_sl   (code, ins->dreg, 0, s390_r13, 4);
2848                         }
2849                 }
2850                         break;
2851                 case OP_SUB_IMM: {
2852                         if (s390_is_imm16 (-ins->inst_imm)) {
2853                                 if (ins->dreg != ins->sreg1) {
2854                                         s390_lr   (code, ins->dreg, ins->sreg1);
2855                                 }
2856                                 s390_ahi  (code, ins->dreg, -ins->inst_imm);
2857                         } else {
2858                                 s390_basr (code, s390_r13, 0);
2859                                 s390_j    (code, 4);
2860                                 s390_word (code, ins->inst_imm);
2861                                 if (ins->dreg != ins->sreg1) {
2862                                         s390_lr   (code, ins->dreg, ins->sreg1);
2863                                 }
2864                                 s390_s    (code, ins->dreg, 0, s390_r13, 4);
2865                         }
2866                 }
2867                         break;
2868                 case OP_SBB_IMM: {
2869                         if (ins->dreg != ins->sreg1) {
2870                                 s390_lr    (code, ins->dreg, ins->sreg1);
2871                         }
2872                         if (s390_is_imm16 (-ins->inst_imm)) {
2873                                 s390_lhi   (code, s390_r0, ins->inst_imm);
2874                                 s390_slbr  (code, ins->dreg, s390_r0);
2875                         } else {
2876                                 s390_basr (code, s390_r13, 0);
2877                                 s390_j    (code, 4);
2878                                 s390_word (code, ins->inst_imm);
2879                                 s390_slb  (code, ins->dreg, 0, s390_r13, 4);
2880                         }
2881                 }
2882                         break;
2883                 case CEE_SUB_OVF: {
2884                         CHECK_SRCDST_NCOM;
2885                         s390_sr   (code, ins->dreg, src2);
2886                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2887                 }
2888                         break;
2889                 case CEE_SUB_OVF_UN: {
2890                         CHECK_SRCDST_NCOM;
2891                         s390_slr  (code, ins->dreg, src2);
2892                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
2893                 }
2894                         break;
2895                 case OP_LSUB_OVF: {
2896                         short int *o[3];
2897                         CHECK_SRCDST_COM;
2898                         s390_lr   (code, s390_r1, src2+1);
2899                         s390_slr  (code, ins->dreg, src2);
2900                         s390_jnl  (code, 0); CODEPTR(code, o[0]);
2901                         s390_ahi  (code, s390_r1, 1);
2902                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2903                         PTRSLOT   (code, o[0]);
2904                         s390_sr   (code, ins->dreg+1, s390_r1);
2905                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2906                 }
2907                         break;
2908                 case OP_LSUB_OVF_UN: {
2909                         CHECK_SRCDST_COM;
2910                         s390_slr  (code, ins->dreg, src2);
2911                         s390_slbr (code, ins->dreg+1, src2+1);
2912                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, "OverflowException");
2913                 }
2914                         break;
2915                 case OP_SUB_OVF_CARRY: {
2916                         CHECK_SRCDST_NCOM;
2917                         s390_lhi  (code, s390_r0, 0);
2918                         s390_lr   (code, s390_r1, s390_r0);
2919                         s390_slbr (code, s390_r0, s390_r1);
2920                         s390_sr   (code, ins->dreg, src2);
2921                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2922                         s390_ar   (code, ins->dreg, s390_r0);
2923                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2924                 }
2925                         break;
2926                 case OP_SUB_OVF_UN_CARRY: {
2927                         CHECK_SRCDST_NCOM;
2928                         s390_slbr (code, ins->dreg, src2);
2929                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
2930                 }
2931                         break;
2932                 case CEE_AND: {
2933                         if (ins->sreg1 == ins->dreg) {
2934                                 s390_nr   (code, ins->dreg, ins->sreg2);
2935                         }
2936                         else {
2937                                 if (ins->sreg2 == ins->dreg) {
2938                                         s390_nr  (code, ins->dreg, ins->sreg1);
2939                                 }
2940                                 else {
2941                                         s390_lr  (code, ins->dreg, ins->sreg1);
2942                                         s390_nr  (code, ins->dreg, ins->sreg2);
2943                                 }
2944                         }
2945                 }
2946                         break;
2947                 case OP_AND_IMM: {
2948                         if (s390_is_imm16 (ins->inst_imm)) {
2949                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2950                                 if (ins->dreg != ins->sreg1) {
2951                                         s390_lr   (code, ins->dreg, ins->sreg1);
2952                                 }
2953                                 s390_nr   (code, ins->dreg, s390_r0);
2954                         } else {
2955                                 s390_basr (code, s390_r13, 0);
2956                                 s390_j    (code, 4);
2957                                 s390_word (code, ins->inst_imm);
2958                                 if (ins->dreg != ins->sreg1) {
2959                                         s390_lr   (code, ins->dreg, ins->sreg1);
2960                                 }
2961                                 s390_n    (code, ins->dreg, 0, s390_r13, 4);
2962                         }
2963                 }
2964                         break;
2965                 case CEE_DIV: {
2966                         s390_lr   (code, s390_r0, ins->sreg1);
2967                         s390_srda (code, s390_r0, 0, 32);
2968                         s390_dr   (code, s390_r0, ins->sreg2);
2969                         s390_lr   (code, ins->dreg, s390_r1);
2970                 }
2971                         break;
2972                 case CEE_DIV_UN: {
2973                         s390_lr   (code, s390_r0, ins->sreg1);
2974                         s390_srdl (code, s390_r0, 0, 32);
2975                         s390_dlr  (code, s390_r0, ins->sreg2);
2976                         s390_lr   (code, ins->dreg, s390_r1);
2977                 }
2978                         break;
2979                 case OP_DIV_IMM: {
2980                         if (s390_is_imm16 (ins->inst_imm)) {
2981                                 s390_lhi  (code, s390_r13, ins->inst_imm);
2982                                 s390_lr   (code, s390_r0, ins->sreg1);
2983                         } else {
2984                                 s390_basr (code, s390_r13, 0);
2985                                 s390_j    (code, 4);
2986                                 s390_word (code, ins->inst_imm);
2987                                 s390_lr   (code, s390_r0, ins->sreg1);
2988                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2989                         }
2990                         s390_srda (code, s390_r0, 0, 32);
2991                         s390_dr   (code, s390_r0, s390_r13);
2992                         s390_lr   (code, ins->dreg, s390_r1);
2993                 }
2994                         break;
2995                 case CEE_REM: {
2996                         s390_lr   (code, s390_r0, ins->sreg1);
2997                         s390_srda (code, s390_r0, 0, 32);
2998                         s390_dr   (code, s390_r0, ins->sreg2);
2999                         s390_lr   (code, ins->dreg, s390_r0);
3000                         break;
3001                 case CEE_REM_UN:
3002                         s390_lr   (code, s390_r0, ins->sreg1);
3003                         s390_srdl (code, s390_r0, 0, 32);
3004                         s390_dlr  (code, s390_r0, ins->sreg2);
3005                         s390_lr   (code, ins->dreg, s390_r0);
3006                 }
3007                         break;
3008                 case OP_REM_IMM: {
3009                         if (s390_is_imm16 (ins->inst_imm)) {
3010                                 s390_lhi  (code, s390_r13, ins->inst_imm);
3011                                 s390_lr   (code, s390_r0, ins->sreg1);
3012                         } else {
3013                                 s390_basr (code, s390_r13, 0);
3014                                 s390_j    (code, 4);
3015                                 s390_word (code, ins->inst_imm);
3016                                 s390_lr   (code, s390_r0, ins->sreg1);
3017                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3018                         }
3019                         s390_srda (code, s390_r0, 0, 32);
3020                         s390_dr   (code, s390_r0, s390_r13);
3021                         s390_lr   (code, ins->dreg, s390_r0);
3022                 }
3023                         break;
3024                 case CEE_OR: {
3025                         if (ins->sreg1 == ins->dreg) {
3026                                 s390_or   (code, ins->dreg, ins->sreg2);
3027                         }
3028                         else {
3029                                 if (ins->sreg2 == ins->dreg) {
3030                                         s390_or  (code, ins->dreg, ins->sreg1);
3031                                 }
3032                                 else {
3033                                         s390_lr  (code, ins->dreg, ins->sreg1);
3034                                         s390_or  (code, ins->dreg, ins->sreg2);
3035                                 }
3036                         }
3037                 }
3038                         break;
3039                 case OP_OR_IMM: {
3040                         if (s390_is_imm16 (ins->inst_imm)) {
3041                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3042                                 if (ins->dreg != ins->sreg1) {
3043                                         s390_lr   (code, ins->dreg, ins->sreg1);
3044                                 }
3045                                 s390_or   (code, ins->dreg, s390_r0);
3046                         } else {
3047                                 s390_basr (code, s390_r13, 0);
3048                                 s390_j    (code, 4);
3049                                 s390_word (code, ins->inst_imm);
3050                                 if (ins->dreg != ins->sreg1) {
3051                                         s390_lr   (code, ins->dreg, ins->sreg1);
3052                                 }
3053                                 s390_o    (code, ins->dreg, 0, s390_r13, 4);
3054                         }
3055                 }
3056                         break;
3057                 case CEE_XOR: {
3058                         if (ins->sreg1 == ins->dreg) {
3059                                 s390_xr   (code, ins->dreg, ins->sreg2);
3060                         }
3061                         else {
3062                                 if (ins->sreg2 == ins->dreg) {
3063                                         s390_xr  (code, ins->dreg, ins->sreg1);
3064                                 }
3065                                 else {
3066                                         s390_lr  (code, ins->dreg, ins->sreg1);
3067                                         s390_xr  (code, ins->dreg, ins->sreg2);
3068                                 }
3069                         }
3070                 }
3071                         break;
3072                 case OP_XOR_IMM: {
3073                         if (s390_is_imm16 (ins->inst_imm)) {
3074                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3075                                 if (ins->dreg != ins->sreg1) {
3076                                         s390_lr   (code, ins->dreg, ins->sreg1);
3077                                 }
3078                                 s390_xr   (code, ins->dreg, s390_r0);
3079                         } else {
3080                                 s390_basr (code, s390_r13, 0);
3081                                 s390_j    (code, 4);
3082                                 s390_word (code, ins->inst_imm);
3083                                 if (ins->dreg != ins->sreg1) {
3084                                         s390_lr   (code, ins->dreg, ins->sreg1);
3085                                 }
3086                                 s390_x    (code, ins->dreg, 0, s390_r13, 4);
3087                         }
3088                 }
3089                         break;
3090                 case CEE_SHL: {
3091                         CHECK_SRCDST_NCOM;
3092                         s390_sll  (code, ins->dreg, src2, 0);
3093                 }
3094                         break;
3095                 case OP_SHL_IMM: {
3096                         if (ins->sreg1 != ins->dreg) {
3097                                 s390_lr   (code, ins->dreg, ins->sreg1);
3098                         }
3099                         s390_sll  (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3100                 }
3101                         break;
3102                 case CEE_SHR: {
3103                         CHECK_SRCDST_NCOM;
3104                         s390_sra  (code, ins->dreg, src2, 0);
3105                 }
3106                         break;
3107                 case OP_SHR_IMM: {
3108                         if (ins->sreg1 != ins->dreg) {
3109                                 s390_lr   (code, ins->dreg, ins->sreg1);
3110                         }
3111                         s390_sra  (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3112                 }
3113                         break;
3114                 case OP_SHR_UN_IMM: {
3115                         if (ins->sreg1 != ins->dreg) {
3116                                 s390_lr   (code, ins->dreg, ins->sreg1);
3117                         }
3118                         s390_srl  (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3119                 }
3120                         break;
3121                 case CEE_SHR_UN: {
3122                         CHECK_SRCDST_NCOM;
3123                         s390_srl  (code, ins->dreg, src2, 0);
3124                 }
3125                         break;
3126                 case CEE_NOT: {
3127                         if (ins->sreg1 != ins->dreg) {
3128                                 s390_lr   (code, ins->dreg, ins->sreg1);
3129                         }
3130                         s390_lhi (code, s390_r0, -1);
3131                         s390_xr  (code, ins->dreg, s390_r0);
3132                 }
3133                         break;
3134                 case CEE_NEG: {
3135                         s390_lcr (code, ins->dreg, ins->sreg1);
3136                 }
3137                         break;
3138                 case CEE_MUL: {
3139                         if (ins->sreg1 == ins->dreg) {
3140                                 s390_msr  (code, ins->dreg, ins->sreg2);
3141                         }
3142                         else {
3143                                 if (ins->sreg2 == ins->dreg) {
3144                                         s390_msr (code, ins->dreg, ins->sreg1);
3145                                 }
3146                                 else {
3147                                         s390_lr  (code, ins->dreg, ins->sreg1);
3148                                         s390_msr (code, ins->dreg, ins->sreg2);
3149                                 }
3150                         }
3151                 }
3152                         break;
3153                 case OP_MUL_IMM: {
3154                         if (s390_is_imm16 (ins->inst_imm)) {
3155                                 s390_lhi  (code, s390_r13, ins->inst_imm);
3156                         } else {
3157                                 s390_basr (code, s390_r13, 0);
3158                                 s390_j    (code, 4);
3159                                 s390_word (code, ins->inst_imm);
3160 //                              if (ins->dreg != ins->sreg1) {
3161 //                                      s390_lr   (code, ins->dreg, ins->sreg1);
3162 //                              }
3163                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3164                         }
3165                         if (ins->dreg != ins->sreg1) {
3166                                 s390_lr   (code, ins->dreg, ins->sreg1);
3167                         }
3168                         s390_msr  (code, ins->dreg, s390_r13);
3169                 }
3170                         break;
3171                 case CEE_MUL_OVF: {
3172                         short int *o[2];
3173                         s390_ltr  (code, s390_r1, ins->sreg1);
3174                         s390_jz   (code, 0); CODEPTR(code, o[0]);
3175                         s390_ltr  (code, s390_r0, ins->sreg2);
3176                         s390_jnz  (code, 6);
3177                         s390_lhi  (code, s390_r1, 0);
3178                         s390_j    (code, 0); CODEPTR(code, o[1]);
3179                         s390_xr   (code, s390_r0, s390_r1);
3180                         s390_msr  (code, s390_r1, ins->sreg2);
3181                         s390_xr   (code, s390_r0, s390_r1);
3182                         s390_srl  (code, s390_r0, 0, 31);
3183                         s390_ltr  (code, s390_r0, s390_r0);
3184                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3185                         PTRSLOT   (code, o[0]);
3186                         PTRSLOT   (code, o[1]);
3187                         s390_lr   (code, ins->dreg, s390_r1);
3188                 }
3189                         break;
3190                 case CEE_MUL_OVF_UN: {
3191                         s390_lhi  (code, s390_r0, 0);
3192                         s390_lr   (code, s390_r1, ins->sreg1);
3193                         s390_mlr  (code, s390_r0, ins->sreg2);
3194                         s390_ltr  (code, s390_r0, s390_r0);
3195                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3196                         s390_lr   (code, ins->dreg, s390_r1);
3197                 }
3198                         break;
3199                 case OP_LMUL: {
3200                         s390_l    (code, s390_r0, 0, ins->sreg1, 4);
3201                         s390_srda (code, s390_r0, 0, 32);
3202                         s390_m    (code, s390_r0, 0, ins->sreg2, 4);
3203                         s390_l    (code, s390_r0, 0, ins->sreg1, 4);
3204                         s390_srl  (code, s390_r0, 0, 31);
3205                         s390_a    (code, s390_r0, 0, ins->sreg1, 0);
3206                         s390_l    (code, s390_r13, 0, ins->sreg2, 0);
3207                         s390_srl  (code, s390_r13, 0, 31);
3208                         s390_ms   (code, s390_r13, 0, ins->sreg1, 4);
3209                         s390_ar   (code, s390_r0, s390_r13);
3210                         s390_st   (code, s390_r0, 0, ins->dreg, 0);
3211                         s390_st   (code, s390_r1, 0, ins->dreg, 4);
3212                 }
3213                         break;
3214                 case OP_ICONST:
3215                 case OP_SETREGIMM: {
3216                         if (s390_is_imm16(ins->inst_c0)) {
3217                                 s390_lhi  (code, ins->dreg, ins->inst_c0);
3218                         } else {
3219                                 s390_basr (code, s390_r13, 0);
3220                                 s390_j    (code, 4);
3221                                 s390_word (code, ins->inst_c0);
3222                                 s390_l    (code, ins->dreg, 0, s390_r13, 4);
3223                         }
3224                 }
3225                         break;
3226                 case OP_AOTCONST: {
3227                         s390_basr (code, s390_r13, 0);
3228                         s390_j    (code, 4);
3229                         mono_add_patch_info (cfg, code - cfg->native_code,
3230                                 (MonoJumpInfoType)ins->inst_i1, ins->inst_p0);
3231                         s390_word (code, 0);
3232                         s390_l    (code,ins->dreg, 0, s390_r13, 4);
3233                 }
3234                         break;
3235                 case CEE_CONV_I4:
3236                 case CEE_CONV_U4:
3237                 case OP_MOVE:
3238                 case OP_SETREG: {
3239                         if (ins->dreg != ins->sreg1) {
3240                                 s390_lr (code, ins->dreg, ins->sreg1);
3241                         }
3242                 }
3243                         break;
3244                 case OP_SETLRET: {
3245                         int saved = ins->sreg1;
3246                         if (ins->sreg1 == s390_r2) {
3247                                 s390_lr (code, s390_r0, ins->sreg1);
3248                                 saved = s390_r0;
3249                         }
3250                         if (ins->sreg2 != s390_r2)
3251                                 s390_lr (code, s390_r2, ins->sreg2);
3252                         if (saved != s390_r3)
3253                                 s390_lr (code, s390_r3, saved);
3254                         break;
3255                 }
3256                 case OP_SETFREG:
3257                 case OP_FMOVE: {
3258                         if (ins->dreg != ins->sreg1) {
3259                                 s390_ldr   (code, ins->dreg, ins->sreg1);
3260                         }
3261                 }
3262                         break;
3263                 case OP_S390_SETF4RET: {
3264                         s390_ledbr (code, ins->dreg, ins->sreg1);
3265                 }
3266                         break;
3267                 case OP_TLS_GET: {
3268                         if (s390_is_imm16 (ins->inst_offset)) {
3269                                 s390_lhi (code, s390_r13, ins->inst_offset);
3270                         } else {
3271                                 s390_bras (code, s390_r13, 0);
3272                                 s390_j    (code, 4);
3273                                 s390_word (code, ins->inst_offset);
3274                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3275                         }
3276                         s390_ear (code, s390_r1, 0);
3277                         s390_l   (code, ins->dreg, s390_r13, s390_r1, 0);
3278                 }
3279                         break;
3280                 case OP_FCONV_TO_R4: {
3281                         if ((ins->next) &&
3282                              (ins->next->opcode != OP_FMOVE) &&
3283                              (ins->next->opcode != OP_STORER4_MEMBASE_REG))
3284                                 s390_ledbr (code, ins->dreg, ins->sreg1);
3285                 }
3286                         break;
3287                 case CEE_JMP: {
3288                         if (cfg->method->save_lmf)
3289                                 restoreLMF(code, cfg->frame_reg, cfg->stack_usage);
3290
3291                         if (cfg->flags & MONO_CFG_HAS_TAIL) {
3292                                 code = emit_load_volatile_registers(code, cfg);
3293                         }
3294
3295                         code = backUpStackPtr(cfg, code, STK_BASE);
3296                         s390_l   (code, s390_r14, 0, STK_BASE, S390_RET_ADDR_OFFSET);
3297                         mono_add_patch_info (cfg, code - cfg->native_code,
3298                                              MONO_PATCH_INFO_METHOD_JUMP,
3299                                              ins->inst_p0);
3300                         s390_jcl (code, S390_CC_UN, 0);
3301                 }
3302                         break;
3303                 case OP_CHECK_THIS: {
3304                         /* ensure ins->sreg1 is not NULL */
3305                         s390_icm (code, s390_r0, 15, ins->sreg1, 0);
3306                 }
3307                         break;
3308                 case OP_ARGLIST: {
3309                         int offset = cfg->sig_cookie + cfg->stack_usage;
3310
3311                         if (s390_is_imm16 (offset))
3312                                 s390_lhi  (code, s390_r0, offset);
3313                         else {
3314                                 s390_basr (code, s390_r13, 0);
3315                                 s390_j    (code, 4);
3316                                 s390_word (code, offset);
3317                                 s390_l    (code, s390_r0, 0, s390_r13, 0);
3318                         }
3319                         s390_ar   (code, s390_r0, cfg->frame_reg);
3320                         s390_st   (code, s390_r0, 0, ins->sreg1, 0);
3321                 }
3322                         break;
3323                 case OP_FCALL: {
3324                         call = (MonoCallInst*)ins;
3325                         if (ins->flags & MONO_INST_HAS_METHOD)
3326                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_METHOD,
3327                                                      call->method);
3328                         else
3329                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS,
3330                                                      call->fptr);
3331                         s390_brasl (code, s390_r14, 0);
3332                         if (call->signature->ret->type == MONO_TYPE_R4)
3333                                 s390_ldebr (code, s390_f0, s390_f0);
3334                 }
3335                         break;
3336                 case OP_LCALL:
3337                 case OP_VCALL:
3338                 case OP_VOIDCALL:
3339                 case CEE_CALL: {
3340                         call = (MonoCallInst*)ins;
3341                         if (ins->flags & MONO_INST_HAS_METHOD)
3342                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_METHOD, call->method);
3343                         else
3344                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS, call->fptr);
3345                         s390_brasl (code, s390_r14, 0);
3346                 }
3347                         break;
3348                 case OP_FCALL_REG: {
3349                         call = (MonoCallInst*)ins;
3350                         s390_lr   (code, s390_r1, ins->sreg1);
3351                         s390_basr (code, s390_r14, s390_r1);
3352                         if (call->signature->ret->type == MONO_TYPE_R4)
3353                                 s390_ldebr (code, s390_f0, s390_f0);
3354                 }
3355                         break;
3356                 case OP_LCALL_REG:
3357                 case OP_VCALL_REG:
3358                 case OP_VOIDCALL_REG:
3359                 case OP_CALL_REG: {
3360                         s390_lr   (code, s390_r1, ins->sreg1);
3361                         s390_basr (code, s390_r14, s390_r1);
3362                 }
3363                         break;
3364                 case OP_FCALL_MEMBASE: {
3365                         call = (MonoCallInst*)ins;
3366                         s390_l    (code, s390_r1, 0, ins->sreg1, ins->inst_offset);
3367                         s390_basr (code, s390_r14, s390_r1);
3368                         if (call->signature->ret->type == MONO_TYPE_R4)
3369                                 s390_ldebr (code, s390_f0, s390_f0);
3370                 }
3371                         break;
3372                 case OP_LCALL_MEMBASE:
3373                 case OP_VCALL_MEMBASE:
3374                 case OP_VOIDCALL_MEMBASE:
3375                 case OP_CALL_MEMBASE: {
3376                         s390_l    (code, s390_r1, 0, ins->sreg1, ins->inst_offset);
3377                         s390_basr (code, s390_r14, s390_r1);
3378                 }
3379                         break;
3380                 case OP_OUTARG:
3381                         g_assert_not_reached ();
3382                         break;
3383                 case OP_LOCALLOC: {
3384                         /*------------------------------------------*/
3385                         /* To allocate space on the stack we have   */
3386                         /* to allow room for parameters passed in   */
3387                         /* calls, the backchain pointer and round   */
3388                         /* it to our stack alignment requirements   */
3389                         /*------------------------------------------*/
3390                         int alloca_skip = S390_MINIMAL_STACK_SIZE + cfg->param_area;
3391                         int area_offset = S390_ALIGN(alloca_skip, S390_STACK_ALIGNMENT);
3392                         s390_lr   (code, s390_r1, ins->sreg1);
3393                         if (ins->flags & MONO_INST_INIT)
3394                                 s390_lr   (code, s390_r0, ins->sreg1);
3395                         s390_ahi  (code, s390_r1, 14);
3396                         s390_srl  (code, s390_r1, 0, 3);
3397                         s390_sll  (code, s390_r1, 0, 3);
3398                         s390_l    (code, s390_r13, 0, STK_BASE, 0);
3399                         s390_sr   (code, STK_BASE, s390_r1);
3400                         s390_st   (code, s390_r13, 0, STK_BASE, 0);
3401                         s390_la   (code, ins->dreg, 0, STK_BASE, area_offset);
3402                         s390_srl  (code, ins->dreg, 0, 3);
3403                         s390_sll  (code, ins->dreg, 0, 3);
3404                         if (ins->flags & MONO_INST_INIT) {
3405                                 s390_lr   (code, s390_r1, s390_r0);
3406                                 s390_lr   (code, s390_r0, ins->dreg);
3407                                 s390_lr   (code, s390_r14, s390_r12);
3408                                 s390_lhi  (code, s390_r13, 0);
3409                                 s390_mvcle(code, s390_r0, s390_r12, 0, 0);
3410                                 s390_jo   (code, -2);
3411                                 s390_lr   (code, s390_r12, s390_r14);
3412                         }
3413                 }
3414                         break;
3415                 case CEE_RET: {
3416                         s390_br  (code, s390_r14);
3417                 }
3418                         break;
3419                 case CEE_THROW: {
3420                         s390_lr (code, s390_r2, ins->sreg1);
3421                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD,
3422                                              (gpointer)"mono_arch_throw_exception");
3423                         s390_brasl (code, s390_r14, 0);
3424                 }
3425                         break;
3426                 case OP_RETHROW: {
3427                         s390_lr (code, s390_r2, ins->sreg1);
3428                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD,
3429                                              (gpointer)"mono_arch_rethrow_exception");
3430                         s390_brasl (code, s390_r14, 0);
3431                 }
3432                         break;
3433                 case OP_START_HANDLER: {
3434                         if (s390_is_uimm12 (ins->inst_left->inst_offset)) {
3435                                 s390_st   (code, s390_r14, 0,
3436                                            ins->inst_left->inst_basereg,
3437                                            ins->inst_left->inst_offset);
3438                         } else {
3439                                 s390_basr (code, s390_r13, 0);
3440                                 s390_j    (code, 4);
3441                                 s390_word (code, ins->inst_left->inst_offset);
3442                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3443                                 s390_st   (code, s390_r14, s390_r13,
3444                                            ins->inst_left->inst_basereg, 0);
3445                         }
3446                 }
3447                         break;
3448                 case OP_ENDFILTER: {
3449                         if (ins->sreg1 != s390_r2)
3450                                 s390_lr (code, s390_r2, ins->sreg1);
3451                         if (s390_is_uimm12 (ins->inst_left->inst_offset)) {
3452                                 s390_l  (code, s390_r14, 0, ins->inst_left->inst_basereg,
3453                                          ins->inst_left->inst_offset);
3454                         } else {
3455                                 s390_basr (code, s390_r13, 0);
3456                                 s390_j    (code, 4);
3457                                 s390_word (code, ins->inst_left->inst_offset);
3458                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3459                                 s390_l    (code, s390_r14, s390_r13,
3460                                            ins->inst_left->inst_basereg, 0);
3461                         }
3462                         s390_br  (code, s390_r14);
3463                 }
3464                         break;
3465                 case CEE_ENDFINALLY: {
3466                         if (s390_is_uimm12 (ins->inst_left->inst_offset)) {
3467                                 s390_l  (code, s390_r14, 0, ins->inst_left->inst_basereg,
3468                                          ins->inst_left->inst_offset);
3469                         } else {
3470                                 s390_basr (code, s390_r13, 0);
3471                                 s390_j    (code, 4);
3472                                 s390_word (code, ins->inst_left->inst_offset);
3473                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3474                                 s390_l    (code, s390_r14, s390_r13,
3475                                            ins->inst_left->inst_basereg, 0);
3476                         }
3477                         s390_br  (code, s390_r14);
3478                 }
3479                         break;
3480                 case OP_CALL_HANDLER: {
3481                         mono_add_patch_info (cfg, code-cfg->native_code,
3482                                              MONO_PATCH_INFO_BB, ins->inst_target_bb);
3483                         s390_brasl (code, s390_r14, 0);
3484                 }
3485                         break;
3486                 case OP_LABEL: {
3487                         ins->inst_c0 = code - cfg->native_code;
3488                 }
3489                         break;
3490                 case CEE_BR:
3491                         EMIT_UNCOND_BRANCH(ins);
3492                         break;
3493                 case OP_BR_REG: {
3494                         s390_br  (code, ins->sreg1);
3495                 }
3496                         break;
3497                 case OP_CEQ: {
3498                         s390_lhi (code, ins->dreg, 1);
3499                         s390_jz  (code, 4);
3500                         s390_lhi (code, ins->dreg, 0);
3501                 }
3502                         break;
3503                 case OP_CLT: {
3504                         s390_lhi (code, ins->dreg, 1);
3505                         s390_jl  (code, 4);
3506                         s390_lhi (code, ins->dreg, 0);
3507                 }
3508                         break;
3509                 case OP_CLT_UN: {
3510                         s390_lhi (code, ins->dreg, 1);
3511                         s390_jlo (code, 4);
3512                         s390_lhi (code, ins->dreg, 0);
3513                 }
3514                         break;
3515                 case OP_CGT: {
3516                         s390_lhi (code, ins->dreg, 1);
3517                         s390_jh  (code, 4);
3518                         s390_lhi (code, ins->dreg, 0);
3519                 }
3520                         break;
3521                 case OP_CGT_UN: {
3522                         s390_lhi (code, ins->dreg, 1);
3523                         s390_jho (code, 4);
3524                         s390_lhi (code, ins->dreg, 0);
3525                 }
3526                         break;
3527                 case OP_COND_EXC_EQ:
3528                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_EQ, ins->inst_p1);
3529                         break;
3530                 case OP_COND_EXC_NE_UN:
3531                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NE, ins->inst_p1);
3532                         break;
3533                 case OP_COND_EXC_LT:
3534                 case OP_COND_EXC_LT_UN:
3535                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, ins->inst_p1);
3536                         break;
3537                 case OP_COND_EXC_GT:
3538                 case OP_COND_EXC_GT_UN:
3539                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GT, ins->inst_p1);
3540                         break;
3541                 case OP_COND_EXC_GE:
3542                 case OP_COND_EXC_GE_UN:
3543                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GE, ins->inst_p1);
3544                         break;
3545                 case OP_COND_EXC_LE:
3546                 case OP_COND_EXC_LE_UN:
3547                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LE, ins->inst_p1);
3548                         break;
3549                 case OP_COND_EXC_OV:
3550                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, ins->inst_p1);
3551                         break;
3552                 case OP_COND_EXC_NO:
3553                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NO, ins->inst_p1);
3554                         break;
3555                 case OP_COND_EXC_C:
3556                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, ins->inst_p1);
3557                         break;
3558                 case OP_COND_EXC_NC:
3559                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, ins->inst_p1);
3560                         break;
3561                 case CEE_BEQ:
3562                         EMIT_COND_BRANCH (ins, S390_CC_EQ);
3563                         break;
3564                 case CEE_BNE_UN:
3565                         EMIT_COND_BRANCH (ins, S390_CC_NE);
3566                         break;
3567                 case CEE_BLT:
3568                 case CEE_BLT_UN:
3569                         EMIT_COND_BRANCH (ins, S390_CC_LT);
3570                         break;
3571                 case CEE_BGT:
3572                 case CEE_BGT_UN:
3573                         EMIT_COND_BRANCH (ins, S390_CC_GT);
3574                         break;
3575                 case CEE_BGE:
3576                 case CEE_BGE_UN:
3577                         EMIT_COND_BRANCH (ins, S390_CC_GE);
3578                         break;
3579                 case CEE_BLE:
3580                 case CEE_BLE_UN:
3581                         EMIT_COND_BRANCH (ins, S390_CC_LE);
3582                         break;
3583
3584                 /* floating point opcodes */
3585                 case OP_R8CONST: {
3586                         if (*((float *) ins->inst_p0) == 0) {
3587                                 s390_lzdr (code, ins->dreg);
3588                         } else {
3589                                 s390_basr  (code, s390_r13, 0);
3590                                 s390_j     (code, 4);
3591                                 s390_word  (code, ins->inst_p0);
3592                                 s390_l     (code, s390_r13, 0, s390_r13, 4);
3593                                 s390_ld    (code, ins->dreg, 0, s390_r13, 0);
3594                         }
3595                 }
3596                         break;
3597                 case OP_R4CONST: {
3598                         if (*((float *) ins->inst_p0) == 0) {
3599                                 s390_lzdr (code, ins->dreg);
3600                         } else {
3601                                 s390_basr (code, s390_r13, 0);
3602                                 s390_j    (code, 4);
3603                                 s390_word (code, ins->inst_p0);
3604                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3605                                 s390_ldeb (code, ins->dreg, 0, s390_r13, 0);
3606                         }
3607                 }
3608                         break;
3609                 case OP_STORER8_MEMBASE_REG: {
3610                         if (s390_is_uimm12(ins->inst_offset)) {
3611                                 s390_std  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
3612                         } else {
3613                                 s390_basr (code, s390_r13, 0);
3614                                 s390_j    (code, 4);
3615                                 s390_word (code, ins->inst_offset);
3616                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3617                                 s390_std  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
3618                         }
3619                 }
3620                         break;
3621                 case OP_LOADR8_MEMBASE: {
3622                         if (s390_is_uimm12(ins->inst_offset)) {
3623                                 s390_ld   (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
3624                         } else {
3625                                 s390_basr (code, s390_r13, 0);
3626                                 s390_j    (code, 4);
3627                                 s390_word (code, ins->inst_offset);
3628                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3629                                 s390_ld   (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
3630                         }
3631                 }
3632                         break;
3633                 case OP_STORER4_MEMBASE_REG: {
3634                         if (s390_is_uimm12(ins->inst_offset)) {
3635                                 s390_ledbr(code, s390_f15, ins->sreg1);
3636                                 s390_ste  (code, s390_f15, 0, ins->inst_destbasereg, ins->inst_offset);
3637                         } else {
3638                                 s390_basr (code, s390_r13, 0);
3639                                 s390_j    (code, 4);
3640                                 s390_word (code, ins->inst_offset);
3641                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3642                                 s390_ledbr(code, s390_f15, ins->sreg1);
3643                                 s390_ste  (code, s390_f15, s390_r13, ins->inst_destbasereg, 0);
3644                         }
3645                 }
3646                         break;
3647                 case OP_LOADR4_MEMBASE: {
3648                         if (s390_is_uimm12(ins->inst_offset)) {
3649                                 s390_ldeb (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
3650                         } else {
3651                                 s390_basr (code, s390_r13, 0);
3652                                 s390_j    (code, 4);
3653                                 s390_word (code, ins->inst_offset);
3654                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3655                                 s390_ldeb (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
3656                         }
3657                 }
3658                         break;
3659                 case CEE_CONV_R_UN: {
3660                         s390_cdfbr (code, ins->dreg, ins->sreg1);
3661                         s390_ltr   (code, ins->sreg1, ins->sreg1);
3662                         s390_jnl   (code, 12);
3663                         s390_basr  (code, s390_r13, 0);
3664                         s390_j     (code, 6);
3665                         s390_word  (code, 0x41f00000);
3666                         s390_word  (code, 0);
3667                         s390_adb   (code, ins->dreg, 0, s390_r13, 4);
3668                 }
3669                         break;
3670                 case CEE_CONV_R4: {
3671                         s390_cdfbr (code, ins->dreg, ins->sreg1);
3672                 }
3673                         break;
3674                 case CEE_CONV_R8: {
3675                         s390_cdfbr (code, ins->dreg, ins->sreg1);
3676                 }
3677                         break;
3678                 case OP_FCONV_TO_I1:
3679                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 1, TRUE);
3680                         break;
3681                 case OP_FCONV_TO_U1:
3682                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 1, FALSE);
3683                         break;
3684                 case OP_FCONV_TO_I2:
3685                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 2, TRUE);
3686                         break;
3687                 case OP_FCONV_TO_U2:
3688                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 2, FALSE);
3689                         break;
3690                 case OP_FCONV_TO_I4:
3691                 case OP_FCONV_TO_I:
3692                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 4, TRUE);
3693                         break;
3694                 case OP_FCONV_TO_U4:
3695                 case OP_FCONV_TO_U:
3696                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 4, FALSE);
3697                         break;
3698                 case OP_FCONV_TO_I8:
3699                 case OP_FCONV_TO_U8:
3700                         g_assert_not_reached ();
3701                         /* Implemented as helper calls */
3702                         break;
3703                 case OP_LCONV_TO_R_UN:
3704                         g_assert_not_reached ();
3705                         /* Implemented as helper calls */
3706                         break;
3707                 case OP_LCONV_TO_OVF_I: {
3708                         /* Valid ints: 0xffffffff:8000000 to 00000000:0x7f000000 */
3709                         short int *o[5];
3710                         s390_ltr  (code, ins->sreg1, ins->sreg1);
3711                         s390_jnl  (code, 0); CODEPTR(code, o[0]);
3712                         s390_ltr  (code, ins->sreg2, ins->sreg2);
3713                         s390_jnl  (code, 0); CODEPTR(code, o[1]);
3714                         s390_lhi  (code, s390_r13, -1);
3715                         s390_cr   (code, ins->sreg2, s390_r13);
3716                         s390_jnz  (code, 0); CODEPTR(code, o[2]);
3717                         if (ins->dreg != ins->sreg1)
3718                                 s390_lr   (code, ins->dreg, ins->sreg1);
3719                         s390_j    (code, 0); CODEPTR(code, o[3]);
3720                         PTRSLOT(code, o[0]);
3721                         s390_ltr  (code, ins->sreg2, ins->sreg2);
3722                         s390_jz   (code, 0); CODEPTR(code, o[4]);
3723                         PTRSLOT(code, o[1]);
3724                         PTRSLOT(code, o[2]);
3725                         mono_add_patch_info (cfg, code - cfg->native_code,
3726                                              MONO_PATCH_INFO_EXC, "OverflowException");
3727                         s390_brasl (code, s390_r14, 0);
3728                         PTRSLOT(code, o[3]);
3729                         PTRSLOT(code, o[4]);
3730                 }
3731                         break;
3732                 case OP_SQRT: {
3733                         s390_sqdbr (code, ins->dreg, ins->sreg1);
3734                 }
3735                         break;
3736                 case OP_FADD: {
3737                         CHECK_SRCDST_COM_F;
3738                         s390_adbr (code, ins->dreg, src2);
3739                 }
3740                         break;
3741                 case OP_FSUB: {
3742                         CHECK_SRCDST_NCOM_F;
3743                         s390_sdbr (code, ins->dreg, src2);
3744                 }
3745                         break;
3746                 case OP_FMUL: {
3747                         CHECK_SRCDST_COM_F;
3748                         s390_mdbr (code, ins->dreg, src2);
3749                 }
3750                         break;
3751                 case OP_FDIV: {
3752                         CHECK_SRCDST_NCOM_F;
3753                         s390_ddbr (code, ins->dreg, src2);
3754                 }
3755                         break;
3756                 case OP_FNEG: {
3757                         s390_lcdbr (code, ins->dreg, ins->sreg1);
3758                 }
3759                         break;
3760                 case OP_FREM: {
3761                         CHECK_SRCDST_NCOM_F;
3762                         s390_didbr (code, ins->dreg, src2, 5, s390_f15);
3763                 }
3764                         break;
3765                 case OP_FCOMPARE: {
3766                         s390_cdbr (code, ins->sreg1, ins->sreg2);
3767                 }
3768                         break;
3769                 case OP_FCEQ: {
3770                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3771                         s390_lhi   (code, ins->dreg, 1);
3772                         s390_je    (code, 4);
3773                         s390_lhi   (code, ins->dreg, 0);
3774                 }
3775                         break;
3776                 case OP_FCLT: {
3777                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3778                         s390_lhi   (code, ins->dreg, 1);
3779                         s390_jl    (code, 4);
3780                         s390_lhi   (code, ins->dreg, 0);
3781                 }
3782                         break;
3783                 case OP_FCLT_UN: {
3784                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3785                         s390_lhi   (code, ins->dreg, 1);
3786                         s390_jlo   (code, 4);
3787                         s390_lhi   (code, ins->dreg, 0);
3788                 }
3789                         break;
3790                 case OP_FCGT: {
3791                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3792                         s390_lhi   (code, ins->dreg, 1);
3793                         s390_jh    (code, 4);
3794                         s390_lhi   (code, ins->dreg, 0);
3795                 }
3796                         break;
3797                 case OP_FCGT_UN: {
3798                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3799                         s390_lhi   (code, ins->dreg, 1);
3800                         s390_jho   (code, 4);
3801                         s390_lhi   (code, ins->dreg, 0);
3802                 }
3803                         break;
3804                 case OP_FBEQ:
3805                         EMIT_COND_BRANCH (ins, S390_CC_EQ|S390_CC_OV);
3806                         break;
3807                 case OP_FBNE_UN:
3808                         EMIT_COND_BRANCH (ins, S390_CC_NE|S390_CC_OV);
3809                         break;
3810                 case OP_FBLT:
3811                         EMIT_COND_BRANCH (ins, S390_CC_LT);
3812                         break;
3813                 case OP_FBLT_UN:
3814                         EMIT_COND_BRANCH (ins, S390_CC_LT|S390_CC_OV);
3815                         break;
3816                 case OP_FBGT:
3817                         EMIT_COND_BRANCH (ins, S390_CC_GT);
3818                         break;
3819                 case OP_FBGT_UN:
3820                         EMIT_COND_BRANCH (ins, S390_CC_GT|S390_CC_OV);
3821                         break;
3822                 case OP_FBGE:
3823                         EMIT_COND_BRANCH (ins, S390_CC_GE);
3824                         break;
3825                 case OP_FBGE_UN:
3826                         EMIT_COND_BRANCH (ins, S390_CC_GE|S390_CC_OV);
3827                         break;
3828                 case OP_FBLE:
3829                         EMIT_COND_BRANCH (ins, S390_CC_LE);
3830                         break;
3831                 case OP_FBLE_UN:
3832                         EMIT_COND_BRANCH (ins, S390_CC_LE|S390_CC_OV);
3833                         break;
3834                 case CEE_CKFINITE: {
3835                         short *o;
3836                         s390_lhi  (code, s390_r13, 0x7f);
3837                         s390_tcdb (code, ins->sreg1, 0, s390_r13, 0);
3838                         s390_jz   (code, 0); CODEPTR(code, o);
3839                         mono_add_patch_info (cfg, code - cfg->native_code,
3840                                              MONO_PATCH_INFO_EXC, "ArithmeticException");
3841                         s390_brasl (code, s390_r14,0);
3842                         PTRSLOT(code, o);
3843                 }
3844                         break;
3845                 case OP_S390_MOVE: {
3846                         if (ins->unused > 0) {
3847                                 if (ins->unused <= 256) {
3848                                         s390_mvc  (code, ins->unused, ins->dreg,
3849                                                    ins->inst_offset, ins->sreg1, ins->inst_imm);
3850                                 } else {
3851                                         s390_lr   (code, s390_r0, ins->dreg);
3852                                         if (s390_is_imm16 (ins->inst_offset)) {
3853                                                 s390_ahi  (code, s390_r0, ins->inst_offset);
3854                                         } else {
3855                                                 s390_basr (code, s390_r13, 0);
3856                                                 s390_j    (code, 4);
3857                                                 s390_word (code, ins->inst_offset);
3858                                                 s390_a    (code, s390_r0, 0, s390_r13, 4);
3859                                         }
3860                                         s390_lr   (code, s390_r14, s390_r12);
3861                                         s390_lr   (code, s390_r12, ins->sreg1);
3862                                         if (s390_is_imm16 (ins->inst_imm)) {
3863                                                 s390_ahi  (code, s390_r12, ins->inst_imm);
3864                                         } else {
3865                                                 s390_basr (code, s390_r13, 0);
3866                                                 s390_j    (code, 4);
3867                                                 s390_word (code, ins->inst_imm);
3868                                                 s390_a    (code, s390_r12, 0, s390_r13, 4);
3869                                         }
3870                                         s390_lr   (code, s390_r1, ins->sreg1);
3871                                         s390_lr   (code, s390_r13, s390_r1);
3872                                         s390_mvcle(code, s390_r0, s390_r12, 0, 0);
3873                                         s390_jo   (code, -2);
3874                                         s390_lr   (code, s390_r12, s390_r14);
3875                                 }
3876                         }
3877                 }
3878                         break;
3879                 case OP_ATOMIC_ADD_I4: {
3880                         s390_lr  (code, s390_r1, ins->sreg2);
3881                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
3882                         s390_a   (code, s390_r1, 0, ins->inst_basereg, ins->inst_offset);
3883                         s390_cs  (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
3884                         s390_jnz (code, -7);
3885                         s390_lr  (code, ins->dreg, s390_r1);
3886                 }
3887                         break;
3888                 case OP_ATOMIC_ADD_NEW_I4: {
3889                         s390_lr  (code, s390_r1, ins->sreg2);
3890                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
3891                         s390_a   (code, s390_r1, 0, ins->inst_basereg, ins->inst_offset);
3892                         s390_cs  (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
3893                         s390_jnz (code, -7);
3894                         s390_lr  (code, ins->dreg, s390_r1);
3895                 }
3896                         break;
3897                 case OP_ATOMIC_EXCHANGE_I4: {
3898                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
3899                         s390_cs  (code, s390_r0, ins->sreg2, ins->inst_basereg, ins->inst_offset);
3900                         s390_jnz (code, -4);
3901                         s390_lr  (code, ins->dreg, s390_r0);
3902                 }
3903                         break;
3904                 default:
3905                         g_warning ("unknown opcode %s in %s()\n", mono_inst_name (ins->opcode), __FUNCTION__);
3906                         g_assert_not_reached ();
3907                 }
3908
3909                 if ((cfg->opt & MONO_OPT_BRANCH) && ((code - cfg->native_code - offset) > max_len)) {
3910                         g_warning ("wrong maximal instruction length of instruction %s (expected %d, got %d)",
3911                                    mono_inst_name (ins->opcode), max_len, code - cfg->native_code - offset);
3912                         g_assert_not_reached ();
3913                 }
3914
3915                 cpos += max_len;
3916
3917                 last_ins = ins;
3918                 last_offset = offset;
3919
3920                 ins = ins->next;
3921         }
3922
3923         cfg->code_len = code - cfg->native_code;
3924 }
3925
3926 /*========================= End of Function ========================*/
3927
3928 /*------------------------------------------------------------------*/
3929 /*                                                                  */
3930 /* Name         - mono_arch_register_lowlevel_calls                 */
3931 /*                                                                  */
3932 /* Function     - Register routines to help with --trace operation. */
3933 /*                                                                  */
3934 /*------------------------------------------------------------------*/
3935
3936 void
3937 mono_arch_register_lowlevel_calls (void)
3938 {
3939         mono_register_jit_icall (mono_arch_break, "mono_arch_break", NULL, TRUE);
3940         mono_register_jit_icall (mono_arch_get_lmf_addr, "mono_arch_get_lmf_addr", NULL, TRUE);
3941 }
3942
3943 /*========================= End of Function ========================*/
3944
3945 /*------------------------------------------------------------------*/
3946 /*                                                                  */
3947 /* Name         - mono_arch_patch_code                              */
3948 /*                                                                  */
3949 /* Function     - Process the patch data created during the         */
3950 /*                instruction build process. This resolves jumps,   */
3951 /*                calls, variables etc.                             */
3952 /*                                                                  */
3953 /*------------------------------------------------------------------*/
3954
3955 static void
3956 mono_arch_break(void) {
3957 }
3958
3959 /*========================= End of Function ========================*/
3960
3961 /*------------------------------------------------------------------*/
3962 /*                                                                  */
3963 /* Name         - mono_arch_patch_code                              */
3964 /*                                                                  */
3965 /* Function     - Process the patch data created during the         */
3966 /*                instruction build process. This resolves jumps,   */
3967 /*                calls, variables etc.                             */
3968 /*                                                                  */
3969 /*------------------------------------------------------------------*/
3970
3971 void
3972 mono_arch_patch_code (MonoMethod *method, MonoDomain *domain,
3973                       guint8 *code, MonoJumpInfo *ji, gboolean run_cctors)
3974 {
3975         MonoJumpInfo *patch_info;
3976
3977         for (patch_info = ji; patch_info; patch_info = patch_info->next) {
3978                 unsigned char *ip = patch_info->ip.i + code;
3979                 gconstpointer target = NULL;
3980
3981                 target = mono_resolve_patch_target (method, domain, code,
3982                                                     patch_info, run_cctors);
3983
3984                 switch (patch_info->type) {
3985                         case MONO_PATCH_INFO_IP:
3986                         case MONO_PATCH_INFO_EXC_NAME:
3987                         case MONO_PATCH_INFO_LDSTR:
3988                         case MONO_PATCH_INFO_TYPE_FROM_HANDLE:
3989                         case MONO_PATCH_INFO_LDTOKEN:
3990                         case MONO_PATCH_INFO_EXC:
3991                                 continue;
3992                         case MONO_PATCH_INFO_SWITCH:
3993                                 /*----------------------------------*/
3994                                 /* ip points at the basr r13,0/j +4 */
3995                                 /* instruction the vtable value     */
3996                                 /* follows this (i.e. ip+6)         */
3997                                 /*----------------------------------*/
3998                                 *((gconstpointer *)(ip+6)) = target;
3999                                 target = NULL;
4000                                 continue;
4001                         case MONO_PATCH_INFO_METHODCONST:
4002                         case MONO_PATCH_INFO_CLASS:
4003                         case MONO_PATCH_INFO_IMAGE:
4004                         case MONO_PATCH_INFO_FIELD:
4005                         case MONO_PATCH_INFO_IID:
4006                                 target = S390_RELATIVE(target, ip);
4007                                 continue;
4008                         case MONO_PATCH_INFO_R4:
4009                         case MONO_PATCH_INFO_R8:
4010                         case MONO_PATCH_INFO_METHOD_REL:
4011                                 g_assert_not_reached ();
4012                                 continue;
4013                         default:
4014                                 target = S390_RELATIVE(target, ip);
4015                                 ip += 2;
4016                 }
4017                 s390_patch (ip, (guint32) target);
4018         }
4019 }
4020
4021 /*========================= End of Function ========================*/
4022
4023 /*------------------------------------------------------------------*/
4024 /*                                                                  */
4025 /* Name         - emit_load_volatile_registers                      */
4026 /*                                                                  */
4027 /* Function     - Create the instruction sequence for loading the   */
4028 /*                parameter registers for use with the 'tail' op.   */
4029 /*                                                                  */
4030 /*                The register loading operations performed here    */
4031 /*                are the mirror of the store operations performed  */
4032 /*                in mono_arch_emit_prolog and need to be kept in   */
4033 /*                synchronization with it.                          */
4034 /*                                                                  */
4035 /*------------------------------------------------------------------*/
4036
4037 guint8 *
4038 emit_load_volatile_registers(guint8 * code, MonoCompile *cfg)
4039 {
4040         MonoMethod *method = cfg->method;
4041         MonoMethodSignature *sig;
4042         MonoInst *inst;
4043         int pos, i;
4044         CallInfo *cinfo;
4045         size_data sz;
4046
4047         sig = mono_method_signature (method);
4048         pos = 0;
4049
4050         cinfo = calculate_sizes (sig, &sz, sig->pinvoke);
4051
4052         if (cinfo->struct_ret) {
4053                 ArgInfo *ainfo = &cinfo->ret;
4054                 inst         = cfg->ret;
4055                 s390_l (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4056         }
4057
4058         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
4059                 ArgInfo *ainfo = cinfo->args + i;
4060                 inst = cfg->varinfo [pos];
4061
4062                 if (inst->opcode == OP_REGVAR) {
4063                         if (ainfo->regtype == RegTypeGeneral)
4064                                 s390_lr (code, ainfo->reg, inst->dreg);
4065                         else if (ainfo->regtype == RegTypeFP) {
4066                                 if (inst->dreg != ainfo->reg) {
4067                                         if (ainfo->size == 4) {
4068                                                 s390_ldebr (code, ainfo->reg, inst->dreg);
4069                                         } else {
4070                                                 s390_ldr   (code, ainfo->reg, inst->dreg);
4071                                         }
4072                                 }
4073                         }
4074                         else if (ainfo->regtype == RegTypeBase) {
4075                         } else
4076                                 g_assert_not_reached ();
4077                 } else {
4078                         if (ainfo->regtype == RegTypeGeneral) {
4079                                 if (!((ainfo->reg >= 2) && (ainfo->reg <= 6)))
4080                                         g_assert_not_reached();
4081                                 switch (ainfo->size) {
4082                                 case 1:
4083                                         s390_ic (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4084                                         break;
4085                                 case 2:
4086                                         s390_lh (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4087                                         break;
4088                                 case 8:
4089                                         s390_lm (code, ainfo->reg, ainfo->reg + 1,
4090                                                   inst->inst_basereg, inst->inst_offset);
4091                                         break;
4092                                 default:
4093                                         s390_l  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4094                                 }
4095                         } else if (ainfo->regtype == RegTypeBase) {
4096                         } else if (ainfo->regtype == RegTypeFP) {
4097                                 if (ainfo->size == 8)
4098                                         s390_ld (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4099                                 else if (ainfo->size == 4)
4100                                         s390_le (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4101                                 else
4102                                         g_assert_not_reached ();
4103                         } else if (ainfo->regtype == RegTypeStructByVal) {
4104                                 if (ainfo->reg != STK_BASE) {
4105                                         switch (ainfo->size) {
4106                                         case 1:
4107                                                 s390_ic (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4108                                                 break;
4109                                         case 2:
4110                                                 s390_lh (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4111                                                 break;
4112                                         case 4:
4113                                                 s390_l  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4114                                                 break;
4115                                         case 8:
4116                                                 s390_lm (code, ainfo->reg, ainfo->reg+1, inst->inst_basereg, inst->inst_offset);
4117                                                 break;
4118                                         }
4119                                 }
4120                         } else if (ainfo->regtype == RegTypeStructByAddr) {
4121                                 if (ainfo->reg != STK_BASE) {
4122                                         s390_l  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4123                                 }
4124                         } else
4125                                 g_assert_not_reached ();
4126                 }
4127                 pos++;
4128         }
4129
4130         g_free (cinfo);
4131
4132         return code;
4133 }
4134
4135 /*========================= End of Function ========================*/
4136
4137 /*------------------------------------------------------------------*/
4138 /*                                                                  */
4139 /* Name         - mono_arch_emit_prolog                             */
4140 /*                                                                  */
4141 /* Function     - Create the instruction sequence for a function    */
4142 /*                prolog.                                           */
4143 /*                                                                  */
4144 /*------------------------------------------------------------------*/
4145
4146 guint8 *
4147 mono_arch_emit_prolog (MonoCompile *cfg)
4148 {
4149         MonoMethod *method = cfg->method;
4150         MonoBasicBlock *bb;
4151         MonoMethodSignature *sig;
4152         MonoInst *inst;
4153         int alloc_size, pos, max_offset, i;
4154         guint8 *code;
4155         CallInfo *cinfo;
4156         size_data sz;
4157         int tracing = 0;
4158         int lmfOffset;                                                          \
4159
4160         if (mono_jit_trace_calls != NULL && mono_trace_eval (method))
4161                 tracing = 1;
4162
4163         cfg->code_size   = 512;
4164         cfg->native_code = code = g_malloc (cfg->code_size);
4165
4166         s390_stm  (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
4167
4168         if (cfg->flags & MONO_CFG_HAS_ALLOCA) {
4169                 cfg->used_int_regs |= 1 << 11;
4170         }
4171
4172         alloc_size = cfg->stack_offset;
4173
4174         cfg->stack_usage = alloc_size;
4175         s390_lr   (code, s390_r11, STK_BASE);
4176         if (s390_is_uimm16 (alloc_size)) {
4177                 s390_ahi  (code, STK_BASE, -alloc_size);
4178         } else {
4179                 int stackSize = alloc_size;
4180                 while (stackSize > 32767) {
4181                         s390_ahi  (code, STK_BASE, -32767);
4182                         stackSize -= 32767;
4183                 }
4184                 s390_ahi  (code, STK_BASE, -stackSize);
4185         }
4186         s390_st   (code, s390_r11, 0, STK_BASE, 0);
4187
4188         if (cfg->frame_reg != STK_BASE)
4189                 s390_lr (code, s390_r11, STK_BASE);
4190
4191         /* compute max_offset in order to use short forward jumps
4192          * we always do it on s390 because the immediate displacement
4193          * for jumps is too small
4194          */
4195         max_offset = 0;
4196         for (bb = cfg->bb_entry; bb; bb = bb->next_bb) {
4197                 MonoInst *ins = bb->code;
4198                 bb->max_offset = max_offset;
4199
4200                 if (cfg->prof_options & MONO_PROFILE_COVERAGE)
4201                         max_offset += 6;
4202
4203                 while (ins) {
4204                         max_offset += ((guint8 *)ins_spec [ins->opcode])[MONO_INST_LEN];
4205                         ins = ins->next;
4206                 }
4207         }
4208
4209         /* load arguments allocated to register from the stack */
4210         sig = mono_method_signature (method);
4211         pos = 0;
4212
4213         cinfo = calculate_sizes (sig, &sz, sig->pinvoke);
4214
4215         if (cinfo->struct_ret) {
4216                 ArgInfo *ainfo = &cinfo->ret;
4217                 inst         = cfg->ret;
4218                 inst->unused = ainfo->vtsize;
4219                 s390_st (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4220         }
4221
4222         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
4223                 ArgInfo *ainfo = cinfo->args + i;
4224                 inst = cfg->varinfo [pos];
4225
4226                 if (inst->opcode == OP_REGVAR) {
4227                         if (ainfo->regtype == RegTypeGeneral)
4228                                 s390_lr (code, inst->dreg, ainfo->reg);
4229                         else if (ainfo->regtype == RegTypeFP) {
4230                                 if (inst->dreg != ainfo->reg) {
4231                                         if (ainfo->size == 4) {
4232                                                 s390_ledbr (code, inst->dreg, ainfo->reg);
4233                                         } else {
4234                                                 s390_ldr   (code, inst->dreg, ainfo->reg);
4235                                         }
4236                                 }
4237                         }
4238                         else if (ainfo->regtype == RegTypeBase) {
4239                                 s390_lr  (code, s390_r13, STK_BASE);
4240                                 s390_ahi (code, s390_r13, alloc_size);
4241                                 s390_l   (code, inst->dreg, 0, s390_r13, ainfo->offset);
4242                         } else
4243                                 g_assert_not_reached ();
4244
4245                         if (cfg->verbose_level > 2)
4246                                 g_print ("Argument %d assigned to register %s\n",
4247                                          pos, mono_arch_regname (inst->dreg));
4248                 } else {
4249                         if (ainfo->regtype == RegTypeGeneral) {
4250                                 if (!((ainfo->reg >= 2) && (ainfo->reg <= 6)))
4251                                         g_assert_not_reached();
4252                                 switch (ainfo->size) {
4253                                 case 1:
4254                                         s390_stc (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4255                                         break;
4256                                 case 2:
4257                                         s390_sth (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4258                                         break;
4259                                 case 8:
4260                                         s390_stm (code, ainfo->reg, ainfo->reg + 1,
4261                                                   inst->inst_basereg, inst->inst_offset);
4262                                         break;
4263                                 default:
4264                                         s390_st  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4265                                 }
4266                         } else if (ainfo->regtype == RegTypeBase) {
4267                         } else if (ainfo->regtype == RegTypeFP) {
4268                                 if (ainfo->size == 8)
4269                                         s390_std (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4270                                 else if (ainfo->size == 4)
4271                                         s390_ste (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4272                                 else
4273                                         g_assert_not_reached ();
4274                         } else if (ainfo->regtype == RegTypeStructByVal) {
4275                                 int doffset = inst->inst_offset;
4276                                 int reg;
4277                                 if (ainfo->reg != STK_BASE)
4278                                         reg = ainfo->reg;
4279                                 else {
4280                                         reg = s390_r0;
4281                                         s390_lr  (code, s390_r13, STK_BASE);
4282                                         s390_ahi (code, s390_r13, alloc_size);
4283                                 }
4284                                 switch (ainfo->size) {
4285                                         case 1:
4286                                                 if (ainfo->reg == STK_BASE)
4287                                                         s390_ic  (code, reg, 0, s390_r13, ainfo->offset+3);
4288                                                 s390_stc (code, reg, 0, inst->inst_basereg, doffset);
4289                                                 break;
4290                                         case 2:
4291                                                 if (ainfo->reg == STK_BASE)
4292                                                         s390_lh  (code, reg, 0, s390_r13, ainfo->offset+2);
4293                                                 s390_sth (code, reg, 0, inst->inst_basereg, doffset);
4294                                                 break;
4295                                         case 4:
4296                                                 if (ainfo->reg == STK_BASE)
4297                                                         s390_l   (code, reg, 0, s390_r13, ainfo->offset);
4298                                                 s390_st  (code, reg, 0, inst->inst_basereg, doffset);
4299                                                 break;
4300                                         case 8:
4301                                                 if (ainfo->reg == STK_BASE)
4302                                                         s390_lm  (code, s390_r0, s390_r1, s390_r13, ainfo->offset);
4303                                                 s390_stm (code, reg, reg+1, inst->inst_basereg, doffset);
4304                                                 break;
4305                                 }
4306                         } else if (ainfo->regtype == RegTypeStructByAddr) {
4307                                 if (ainfo->reg == STK_BASE) {
4308                                         s390_lr  (code, s390_r13, ainfo->reg);
4309                                         s390_ahi (code, s390_r13, alloc_size);
4310                                         s390_l   (code, s390_r13, 0, s390_r13, ainfo->offset);
4311                                         code = emit_memcpy (code, abs(ainfo->vtsize),
4312                                                             inst->inst_basereg,
4313                                                             inst->inst_offset, s390_r13, 0);
4314                                 } else {
4315                                         s390_st  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4316                                 }
4317                         } else
4318                                 g_assert_not_reached ();
4319                 }
4320                 pos++;
4321         }
4322
4323         if (method->save_lmf) {
4324                 /*---------------------------------------------------------------*/
4325                 /* we build the MonoLMF structure on the stack - see mini-s390.h */
4326                 /*---------------------------------------------------------------*/
4327                 lmfOffset = alloc_size - sizeof(MonoLMF);
4328
4329                 s390_lr    (code, s390_r13, cfg->frame_reg);
4330                 s390_ahi   (code, s390_r13, lmfOffset);
4331
4332                 /*---------------------------------------------------------------*/
4333                 /* Preserve the parameter registers while we fix up the lmf      */
4334                 /*---------------------------------------------------------------*/
4335                 s390_stm   (code, s390_r2, s390_r6, s390_r13,
4336                             G_STRUCT_OFFSET(MonoLMF, pregs[0]));
4337
4338                 /*---------------------------------------------------------------*/
4339                 /* On return from this call r2 have the address of the &lmf      */
4340                 /*---------------------------------------------------------------*/
4341                 mono_add_patch_info (cfg, code - cfg->native_code,
4342                                      MONO_PATCH_INFO_INTERNAL_METHOD,
4343                                      (gpointer)"mono_get_lmf_addr");
4344                 s390_brasl (code, s390_r14, 0);
4345
4346                 /*---------------------------------------------------------------*/
4347                 /* Set lmf.lmf_addr = jit_tls->lmf                               */
4348                 /*---------------------------------------------------------------*/
4349                 s390_st    (code, s390_r2, 0, s390_r13,
4350                             G_STRUCT_OFFSET(MonoLMF, lmf_addr));
4351
4352                 /*---------------------------------------------------------------*/
4353                 /* Get current lmf                                               */
4354                 /*---------------------------------------------------------------*/
4355                 s390_l     (code, s390_r0, 0, s390_r2, 0);
4356
4357                 /*---------------------------------------------------------------*/
4358                 /* Set our lmf as the current lmf                                */
4359                 /*---------------------------------------------------------------*/
4360                 s390_st    (code, s390_r13, 0, s390_r2, 0);
4361
4362                 /*---------------------------------------------------------------*/
4363                 /* Have our lmf.previous_lmf point to the last lmf               */
4364                 /*---------------------------------------------------------------*/
4365                 s390_st    (code, s390_r0, 0, s390_r13,
4366                             G_STRUCT_OFFSET(MonoLMF, previous_lmf));
4367
4368                 /*---------------------------------------------------------------*/
4369                 /* save method info                                              */
4370                 /*---------------------------------------------------------------*/
4371                 s390_basr  (code, s390_r1, 0);
4372                 s390_j     (code, 4);
4373                 s390_word  (code, method);
4374                 s390_l     (code, s390_r1, 0, s390_r1, 4);
4375                 s390_st    (code, s390_r1, 0, s390_r13,
4376                             G_STRUCT_OFFSET(MonoLMF, method));
4377
4378                 /*---------------------------------------------------------------*/
4379                 /* save the current IP                                           */
4380                 /*---------------------------------------------------------------*/
4381                 s390_lr    (code, s390_r1, cfg->frame_reg);
4382                 s390_st    (code, s390_r1, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, ebp));
4383                 s390_basr  (code, s390_r1, 0);
4384                 s390_la    (code, s390_r1, 0, s390_r1, 0);
4385                 s390_st    (code, s390_r1, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, eip));
4386
4387                 /*---------------------------------------------------------------*/
4388                 /* Save general and floating point registers                     */
4389                 /*---------------------------------------------------------------*/
4390                 s390_stm   (code, s390_r2, s390_r12, s390_r13,
4391                             G_STRUCT_OFFSET(MonoLMF, gregs[2]));
4392                 for (i = 0; i < 16; i++) {
4393                         s390_std  (code, i, 0, s390_r13,
4394                                    G_STRUCT_OFFSET(MonoLMF, fregs[i]));
4395                 }
4396
4397                 /*---------------------------------------------------------------*/
4398                 /* Restore the parameter registers now that we've set up the lmf */
4399                 /*---------------------------------------------------------------*/
4400                 s390_lm    (code, s390_r2, s390_r6, s390_r13,
4401                             G_STRUCT_OFFSET(MonoLMF, pregs[0]));
4402         }
4403
4404         if (tracing)
4405                 code = mono_arch_instrument_prolog(cfg, enter_method, code, TRUE);
4406
4407         cfg->code_len = code - cfg->native_code;
4408         g_free (cinfo);
4409
4410         return code;
4411 }
4412
4413 /*========================= End of Function ========================*/
4414
4415 /*------------------------------------------------------------------*/
4416 /*                                                                  */
4417 /* Name         - mono_arch_emit_epilog                             */
4418 /*                                                                  */
4419 /* Function     - Emit the instructions for a function epilog.      */
4420 /*                                                                  */
4421 /*------------------------------------------------------------------*/
4422
4423 void
4424 mono_arch_emit_epilog (MonoCompile *cfg)
4425 {
4426         MonoMethod *method = cfg->method;
4427         int tracing = 0;
4428         guint8 *code;
4429         int max_epilog_size = 96;
4430
4431         if (cfg->method->save_lmf)
4432                 max_epilog_size += 128;
4433
4434         if (mono_jit_trace_calls != NULL)
4435                 max_epilog_size += 128;
4436
4437         if (cfg->prof_options & MONO_PROFILE_ENTER_LEAVE)
4438                 max_epilog_size += 128;
4439
4440         while ((cfg->code_len + max_epilog_size) > (cfg->code_size - 16)) {
4441                 cfg->code_size  *= 2;
4442                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
4443                 mono_jit_stats.code_reallocs++;
4444         }
4445
4446         code = cfg->native_code + cfg->code_len;
4447
4448         if (mono_jit_trace_calls != NULL && mono_trace_eval (method)) {
4449                 code = mono_arch_instrument_epilog (cfg, leave_method, code, TRUE);
4450                 tracing = 1;
4451         }
4452
4453         if (method->save_lmf)
4454                 restoreLMF(code, cfg->frame_reg, cfg->stack_usage);
4455
4456         if (cfg->flags & MONO_CFG_HAS_ALLOCA)
4457                 s390_l (code, STK_BASE, 0, STK_BASE, 0);
4458         else
4459                 code = backUpStackPtr(cfg, code, STK_BASE);
4460
4461         s390_lm  (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
4462         s390_br  (code, s390_r14);
4463
4464         cfg->code_len = code - cfg->native_code;
4465
4466         g_assert (cfg->code_len < cfg->code_size);
4467
4468 }
4469
4470 /*========================= End of Function ========================*/
4471
4472 /*------------------------------------------------------------------*/
4473 /*                                                                  */
4474 /* Name         - mono_arch_emit_exceptions                         */
4475 /*                                                                  */
4476 /* Function     - Emit the blocks to handle exception conditions.   */
4477 /*                                                                  */
4478 /*------------------------------------------------------------------*/
4479
4480 void
4481 mono_arch_emit_exceptions (MonoCompile *cfg)
4482 {
4483         MonoJumpInfo    *patch_info;
4484         guint8          *code;
4485         int             nThrows = 0,
4486                         exc_count = 0,
4487                         iExc;
4488         guint32         code_size;
4489         MonoClass       *exc_classes [MAX_EXC];
4490         guint8          *exc_throw_start [MAX_EXC],
4491                         *exc_throw_end [MAX_EXC];
4492
4493         for (patch_info = cfg->patch_info;
4494              patch_info;
4495              patch_info = patch_info->next) {
4496                 if (patch_info->type == MONO_PATCH_INFO_EXC)
4497                         exc_count++;
4498         }
4499
4500         code_size = exc_count * 26;
4501
4502         while ((cfg->code_len + code_size) > (cfg->code_size - 16)) {
4503                 cfg->code_size  *= 2;
4504                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
4505                 mono_jit_stats.code_reallocs++;
4506         }
4507
4508         code = cfg->native_code + cfg->code_len;
4509
4510         /*---------------------------------------------------------------------*/
4511         /* Add code to raise exceptions                                        */
4512         /*---------------------------------------------------------------------*/
4513         for (patch_info = cfg->patch_info; patch_info; patch_info = patch_info->next) {
4514                 switch (patch_info->type) {
4515                 case MONO_PATCH_INFO_EXC: {
4516                         guint8 *ip = patch_info->ip.i + cfg->native_code;
4517                         MonoClass *exc_class;
4518                         guint32 throw_ip;
4519
4520                         /*-----------------------------------------------------*/
4521                         /* Patch the branch in epilog to come here             */
4522                         /*-----------------------------------------------------*/
4523                         s390_patch (ip + 2, (guint32) (S390_RELATIVE(code,ip)));
4524
4525                         exc_class = mono_class_from_name (mono_defaults.corlib,
4526                                                           "System",
4527                                                           patch_info->data.name);
4528                         g_assert (exc_class);
4529                         throw_ip = patch_info->ip.i;
4530
4531                         for (iExc = 0; iExc < nThrows; ++iExc)
4532                                 if (exc_classes [iExc] == exc_class)
4533                                         break;
4534
4535                         if (iExc < nThrows) {
4536                                 s390_jcl (code, S390_CC_UN, (guint32) exc_throw_start [iExc]);
4537                                 patch_info->type = MONO_PATCH_INFO_NONE;
4538                         } else {
4539
4540                                 if (nThrows < MAX_EXC) {
4541                                         exc_classes [nThrows]     = exc_class;
4542                                         exc_throw_start [nThrows] = code;
4543                                 }
4544
4545                                 /*---------------------------------------------*/
4546                                 /* Patch the parameter passed to the handler   */
4547                                 /*---------------------------------------------*/
4548                                 s390_basr (code, s390_r13, 0);
4549                                 s390_j    (code, 4);
4550                                 s390_word (code, patch_info->data.target);
4551                                 /*---------------------------------------------*/
4552                                 /* Load return address & parameter register    */
4553                                 /*---------------------------------------------*/
4554                                 s390_larl (code, s390_r14, S390_RELATIVE((patch_info->ip.i +
4555                                                            cfg->native_code + 8), code));
4556                                 s390_l    (code, s390_r2, 0, s390_r13, 4);
4557                                 /*---------------------------------------------*/
4558                                 /* Reuse the current patch to set the jump     */
4559                                 /*---------------------------------------------*/
4560                                 patch_info->type      = MONO_PATCH_INFO_INTERNAL_METHOD;
4561                                 patch_info->data.name = "mono_arch_throw_exception_by_name";
4562                                 patch_info->ip.i      = code - cfg->native_code;
4563                                 s390_jcl  (code, S390_CC_UN, 0);
4564                         }
4565                         break;
4566                 }
4567                 default:
4568                         /* do nothing */
4569                         break;
4570                 }
4571         }
4572
4573         cfg->code_len = code - cfg->native_code;
4574
4575         g_assert (cfg->code_len < cfg->code_size);
4576
4577 }
4578
4579 /*========================= End of Function ========================*/
4580
4581 /*------------------------------------------------------------------*/
4582 /*                                                                  */
4583 /* Name         - mono_arch_setup_jit_tls_data                      */
4584 /*                                                                  */
4585 /* Function     - Setup the JIT's Thread Level Specific Data.       */
4586 /*                                                                  */
4587 /*------------------------------------------------------------------*/
4588
4589 void
4590 mono_arch_setup_jit_tls_data (MonoJitTlsData *tls)
4591 {
4592 #ifdef MONO_ARCH_SIGSEGV_ON_ALTSTACK
4593         pthread_t       self = pthread_self();
4594         pthread_attr_t  attr;
4595         void            *stAddr = NULL;
4596         size_t          stSize  = 0;
4597         struct sigaltstack sa;
4598 #endif
4599
4600         if (!tls_offset_inited) {
4601                 tls_offset_inited = TRUE;
4602
4603 #if HAVE_KW_THREAD
4604 # if 0
4605         __asm__ ("\tear\t%r1,0\n"
4606                  "\tlr\t%0,%3\n"
4607                  "\tsr\t%0,%r1\n"
4608                  "\tlr\t%1,%4\n"
4609                  "\tsr\t%1,%r1\n"
4610                  "\tlr\t%2,%5\n"
4611                  "\tsr\t%2,%r1\n"
4612                  : "=r" (appdomain_tls_offset),
4613                    "=r" (thread_tls_offset),
4614                    "=r" (lmf_tls_offset)
4615                  : "r" (&tls_appdomain),
4616                    "r" (&tls_current_object),
4617                    "r" (&mono_lmf_addr)
4618                  : "1", "cc");
4619 # endif
4620 #endif
4621         }
4622
4623 #ifdef MONO_ARCH_SIGSEGV_ON_ALTSTACK
4624
4625         /*----------------------------------------------------------*/
4626         /* Determine stack boundaries                               */
4627         /*----------------------------------------------------------*/
4628         if (!mono_running_on_valgrind ()) {
4629 #ifdef HAVE_PTHREAD_GETATTR_NP
4630                 pthread_getattr_np( self, &attr );
4631 #elif HAVE_PTHREAD_ATTR_GET_NP
4632                 pthread_attr_get_np( self, &attr );
4633 #endif
4634                 pthread_attr_getstack( &attr, &stAddr, &stSize );
4635         }
4636
4637
4638         /*----------------------------------------------------------*/
4639         /* Setup an alternate signal stack                          */
4640         /*----------------------------------------------------------*/
4641         tls->stack_size        = stSize;
4642         tls->signal_stack      = mmap (0, SIGNAL_STACK_SIZE,
4643                                        PROT_READ|PROT_WRITE|PROT_EXEC,
4644                                        MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
4645         tls->signal_stack_size = SIGNAL_STACK_SIZE;
4646
4647         sa.ss_sp    = tls->signal_stack;
4648         sa.ss_size  = SIGNAL_STACK_SIZE;
4649         sa.ss_flags = SS_ONSTACK;
4650         sigaltstack (&sa, NULL);
4651 #endif
4652         if (!lmf_addr_key_inited) {
4653                 lmf_addr_key_inited = TRUE;
4654                 pthread_key_create (&lmf_addr_key, NULL);
4655         }
4656         pthread_setspecific (lmf_addr_key, &tls->lmf);
4657
4658 }
4659
4660 /*========================= End of Function ========================*/
4661
4662 /*------------------------------------------------------------------*/
4663 /*                                                                  */
4664 /* Name         - mono_arch_free_jit_tls_data                       */
4665 /*                                                                  */
4666 /* Function     - Free tls data.                                    */
4667 /*                                                                  */
4668 /*------------------------------------------------------------------*/
4669
4670 void
4671 mono_arch_free_jit_tls_data (MonoJitTlsData *tls)
4672 {
4673 #ifdef MONO_ARCH_SIGSEGV_ON_ALTSTACK
4674         struct sigaltstack sa;
4675
4676         sa.ss_sp    = tls->signal_stack;
4677         sa.ss_size  = SIGNAL_STACK_SIZE;
4678         sa.ss_flags = SS_DISABLE;
4679         sigaltstack (&sa, NULL);
4680
4681         if (tls->signal_stack)
4682                 munmap(tls->signal_stack, SIGNAL_STACK_SIZE);
4683 #endif
4684
4685 }
4686
4687 /*========================= End of Function ========================*/
4688
4689 /*------------------------------------------------------------------*/
4690 /*                                                                  */
4691 /* Name         - mono_arch_emit_this_vret_args                     */
4692 /*                                                                  */
4693 /* Function     -                                                   */
4694 /*                                                                  */
4695 /*------------------------------------------------------------------*/
4696
4697 void
4698 mono_arch_emit_this_vret_args (MonoCompile *cfg, MonoCallInst *inst, int this_reg, int this_type, int vt_reg)
4699 {
4700         int this_dreg = s390_r2;
4701
4702         if (vt_reg != -1)
4703                 this_dreg = s390_r3;
4704
4705         /* add the this argument */
4706         if (this_reg != -1) {
4707                 MonoInst *this;
4708                 MONO_INST_NEW (cfg, this, OP_SETREG);
4709                 this->type  = this_type;
4710                 this->sreg1 = this_reg;
4711                 this->dreg  = mono_regstate_next_int (cfg->rs);
4712                 mono_bblock_add_inst (cfg->cbb, this);
4713                 mono_call_inst_add_outarg_reg (inst, this->dreg, this_dreg, FALSE);
4714         }
4715
4716         if (vt_reg != -1) {
4717                 MonoInst *vtarg;
4718                 MONO_INST_NEW (cfg, vtarg, OP_SETREG);
4719                 vtarg->type  = STACK_MP;
4720                 vtarg->sreg1 = vt_reg;
4721                 vtarg->dreg  = mono_regstate_next_int (cfg->rs);
4722                 mono_bblock_add_inst (cfg->cbb, vtarg);
4723                 mono_call_inst_add_outarg_reg (inst, vtarg->dreg, s390_r2, FALSE);
4724         }
4725 }
4726
4727 /*========================= End of Function ========================*/
4728
4729 /*------------------------------------------------------------------*/
4730 /*                                                                  */
4731 /* Name         - mono_arch_get_inst_for_method                   */
4732 /*                                                                  */
4733 /* Function     - Check for opcodes we can handle directly in       */
4734 /*                hardware.                                         */
4735 /*                                                                  */
4736 /*------------------------------------------------------------------*/
4737
4738 MonoInst*
4739 mono_arch_get_inst_for_method (MonoCompile *cfg, MonoMethod *cmethod,
4740                                MonoMethodSignature *fsig, MonoInst **args)
4741 {
4742         MonoInst *ins = NULL;
4743
4744         if (cmethod->klass == mono_defaults.math_class) {
4745                 if (strcmp (cmethod->name, "Sqrt") == 0) {
4746                         MONO_INST_NEW (cfg, ins, OP_SQRT);
4747                         ins->inst_i0 = args [0];
4748                 }
4749         } else if(cmethod->klass->image == mono_defaults.corlib &&
4750                            (strcmp (cmethod->klass->name_space, "System.Threading") == 0) &&
4751                            (strcmp (cmethod->klass->name, "Interlocked") == 0)) {
4752
4753                 if (strcmp (cmethod->name, "Increment") == 0 &&
4754                     fsig->params [0]->type == MONO_TYPE_I4) {
4755                         MonoInst *ins_iconst;
4756
4757                         MONO_INST_NEW (cfg, ins, OP_ATOMIC_ADD_NEW_I4);
4758                         MONO_INST_NEW (cfg, ins_iconst, OP_ICONST);
4759                         ins_iconst->inst_c0 = 1;
4760
4761                         ins->inst_i0 = args [0];
4762                         ins->inst_i1 = ins_iconst;
4763                 } else if (strcmp (cmethod->name, "Decrement") == 0 &&
4764                            fsig->params [0]->type == MONO_TYPE_I4) {
4765                         MonoInst *ins_iconst;
4766
4767                         MONO_INST_NEW (cfg, ins, OP_ATOMIC_ADD_NEW_I4);
4768                         MONO_INST_NEW (cfg, ins_iconst, OP_ICONST);
4769                         ins_iconst->inst_c0 = -1;
4770
4771                         ins->inst_i0 = args [0];
4772                         ins->inst_i1 = ins_iconst;
4773                 } else if (strcmp (cmethod->name, "Exchange") == 0 &&
4774                            fsig->params [0]->type == MONO_TYPE_I4) {
4775                         MONO_INST_NEW (cfg, ins, OP_ATOMIC_EXCHANGE_I4);
4776
4777                         ins->inst_i0 = args [0];
4778                         ins->inst_i1 = args [1];
4779                 } else if (strcmp (cmethod->name, "Add") == 0 &&
4780                            fsig->params [0]->type == MONO_TYPE_I4) {
4781                         MONO_INST_NEW (cfg, ins, OP_ATOMIC_ADD_I4);
4782
4783                         ins->inst_i0 = args [0];
4784                         ins->inst_i1 = args [1];
4785                 }
4786         }
4787         return ins;
4788 }
4789
4790 /*========================= End of Function ========================*/
4791
4792 /*------------------------------------------------------------------*/
4793 /*                                                                  */
4794 /* Name         - mono_arch_print_tree                              */
4795 /*                                                                  */
4796 /* Function     - Print platform-specific opcode details.           */
4797 /*                                                                  */
4798 /* Returns      - 1 - opcode details have been printed              */
4799 /*                0 - opcode details have not been printed          */
4800 /*                                                                  */
4801 /*------------------------------------------------------------------*/
4802
4803 gboolean
4804 mono_arch_print_tree (MonoInst *tree, int arity)
4805 {
4806         gboolean done;
4807
4808         switch (tree->opcode) {
4809                 case OP_S390_LOADARG:
4810                 case OP_S390_ARGREG:
4811                 case OP_S390_ARGPTR:
4812                         printf ("[0x%lx(%s)]", tree->inst_offset,
4813                                 mono_arch_regname (tree->inst_basereg));
4814                         done = 1;
4815                         break;
4816                 case OP_S390_STKARG:
4817                         printf ("[0x%lx(previous_frame)]",
4818                                 tree->inst_offset);
4819                         done = 1;
4820                         break;
4821                 case OP_S390_MOVE:
4822                         printf ("[0x%lx(%d,%s),0x%lx(%s)]",
4823                                 tree->inst_offset, tree->unused,
4824                                 mono_arch_regname(tree->dreg), tree->inst_imm,
4825                                 mono_arch_regname(tree->sreg1));
4826                         done = 1;
4827                         break;
4828                 case OP_S390_SETF4RET:
4829                         printf ("[f%ld,f%ld]",
4830                                 mono_arch_regname (tree->dreg),
4831                                 mono_arch_regname (tree->sreg1));
4832                         done = 1;
4833                         break;
4834                 case OP_TLS_GET:
4835                         printf ("[0x%lx(0x%lx,%s)]", tree->inst_offset,
4836                                 tree->inst_imm,
4837                                 mono_arch_regname (tree->sreg1));
4838                         done = 1;
4839                 default:
4840                         done = 0;
4841         }
4842         return (done);
4843 }
4844
4845 /*========================= End of Function ========================*/
4846
4847 /*------------------------------------------------------------------*/
4848 /*                                                                  */
4849 /* Name         - mono_arch_regalloc_cost                           */
4850 /*                                                                  */
4851 /* Function     - Determine the cost, in the number of memory       */
4852 /*                references, of the action of allocating the var-  */
4853 /*                iable VMV into a register during global register  */
4854 /*                allocation.                                       */
4855 /*                                                                  */
4856 /* Returns      - Cost                                              */
4857 /*                                                                  */
4858 /*------------------------------------------------------------------*/
4859
4860 guint32
4861 mono_arch_regalloc_cost (MonoCompile *cfg, MonoMethodVar *vmv)
4862 {
4863         /* FIXME: */
4864         return 2;
4865 }
4866
4867 /*========================= End of Function ========================*/
4868
4869 /*------------------------------------------------------------------*/
4870 /*                                                                  */
4871 /* Name         - mono_arch_get_domain_intrinsic                    */
4872 /*                                                                  */
4873 /* Function     -                                                   */
4874 /*                                                                  */
4875 /* Returns      -                                                   */
4876 /*                                                                  */
4877 /*------------------------------------------------------------------*/
4878
4879 MonoInst *
4880 mono_arch_get_domain_intrinsic (MonoCompile* cfg)
4881 {
4882         MonoInst *ins;
4883
4884         if (appdomain_tls_offset == -1)
4885                 return NULL;
4886
4887         MONO_INST_NEW (cfg, ins, OP_TLS_GET);
4888         ins->inst_offset = appdomain_tls_offset;
4889         return (ins);
4890 }
4891
4892 /*========================= End of Function ========================*/
4893
4894 /*------------------------------------------------------------------*/
4895 /*                                                                  */
4896 /* Name         - mono_arch_get_thread_intrinsic                    */
4897 /*                                                                  */
4898 /* Function     -                                                   */
4899 /*                                                                  */
4900 /* Returns      -                                                   */
4901 /*                                                                  */
4902 /*------------------------------------------------------------------*/
4903
4904 MonoInst *
4905 mono_arch_get_thread_intrinsic (MonoCompile* cfg)
4906 {
4907         MonoInst *ins;
4908
4909         if (thread_tls_offset == -1)
4910                 return NULL;
4911
4912         MONO_INST_NEW (cfg, ins, OP_TLS_GET);
4913         ins->inst_offset = thread_tls_offset;
4914         return (ins);
4915 }
4916
4917 /*========================= End of Function ========================*/
4918
4919 /*------------------------------------------------------------------*/
4920 /*                                                                  */
4921 /* Name         - mono_arch_flush_register_windows                  */
4922 /*                                                                  */
4923 /* Function     -                                                   */
4924 /*                                                                  */
4925 /* Returns      -                                                   */
4926 /*                                                                  */
4927 /*------------------------------------------------------------------*/
4928
4929 void
4930 mono_arch_flush_register_windows (void)
4931 {
4932 }
4933
4934 /*========================= End of Function ========================*/
4935
4936 /*------------------------------------------------------------------*/
4937 /*                                                                  */
4938 /* Name         - mono_arch_get_lmf_addr                            */
4939 /*                                                                  */
4940 /* Function     -                                                   */
4941 /*                                                                  */
4942 /* Returns      -                                                   */
4943 /*                                                                  */
4944 /*------------------------------------------------------------------*/
4945
4946 gpointer
4947 mono_arch_get_lmf_addr (void)
4948 {
4949         return pthread_getspecific (lmf_addr_key);
4950 }
4951
4952
4953 /*========================= End of Function ========================*/