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 EMIT_COND_BRANCH(ins,cond)                                                      \
  22 {                                                                                       \
  23 if (ins->flags & MONO_INST_BRLABEL) {                                                   \
  24         if (ins->inst_i0->inst_c0) {                                                    \
  25                 int displace;                                                           \
  26                 displace = ((cfg->native_code + ins->inst_i0->inst_c0) - code) / 2;     \
  27                 if (s390_is_imm16(displace)) {                                          \
  28                         s390_brc (code, cond, displace);                                \
  29                 } else {                                                                \
  30                         s390_jcl (code, cond, displace);                                \
  31                 }                                                                       \
  32         } else {                                                                        \
  33                 mono_add_patch_info (cfg, code - cfg->native_code,                      \
  34                                      MONO_PATCH_INFO_LABEL, ins->inst_i0);              \
  35                 s390_jcl (code, cond, 0);                                               \
  36         }                                                                               \
  37 } else {                                                                                \
  38         if (ins->inst_true_bb->native_offset) {                                         \
  39                 int displace;                                                           \
  40                 displace = ((cfg->native_code +                                         \
  41                             ins->inst_true_bb->native_offset) - code) / 2;              \
  42                 if (s390_is_imm16(displace)) {                                          \
  43                         s390_brc (code, cond, displace);                                \
  44                 } else {                                                                \
  45                         s390_jcl (code, cond, displace);                                \
  46                 }                                                                       \
  47         } else {                                                                        \
  48                 mono_add_patch_info (cfg, code - cfg->native_code,                      \
  49                                      MONO_PATCH_INFO_BB, ins->inst_true_bb);            \
  50                 s390_jcl (code, cond, 0);                                               \
  51         }                                                                               \
  52 }                                                                                       \
  53 }
  54
  55 #define EMIT_UNCOND_BRANCH(ins)                                                         \
  56 {                                                                                       \
  57 if (ins->flags & MONO_INST_BRLABEL) {                                                   \
  58         if (ins->inst_i0->inst_c0) {                                                    \
  59                 int displace;                                                           \
  60                 displace = ((cfg->native_code + ins->inst_i0->inst_c0) - code) / 2;     \
  61                 if (s390_is_imm16(displace)) {                                          \
  62                         s390_brc (code, S390_CC_UN, displace);                          \
  63                 } else {                                                                \
  64                         s390_jcl (code, S390_CC_UN, displace);                          \
  65                 }                                                                       \
  66         } else {                                                                        \
  67                 mono_add_patch_info (cfg, code - cfg->native_code,                      \
  68                                      MONO_PATCH_INFO_LABEL, ins->inst_i0);              \
  69                 s390_jcl (code, S390_CC_UN, 0);                                         \
  70         }                                                                               \
  71 } else {                                                                                \
  72         if (ins->inst_target_bb->native_offset) {                                       \
  73                 int displace;                                                           \
  74                 displace = ((cfg->native_code +                                         \
  75                             ins->inst_target_bb->native_offset) - code) / 2;            \
  76                 if (s390_is_imm16(displace)) {                                          \
  77                         s390_brc (code, S390_CC_UN, displace);                          \
  78                 } else {                                                                \
  79                         s390_jcl (code, S390_CC_UN, displace);                          \
  80                 }                                                                       \
  81         } else {                                                                        \
  82                 mono_add_patch_info (cfg, code - cfg->native_code,                      \
  83                                      MONO_PATCH_INFO_BB, ins->inst_target_bb);          \
  84                 s390_jcl (code, S390_CC_UN, 0);                                         \
  85         }                                                                               \
  86 }                                                                                       \
  87 }
  88
  89 #define EMIT_COND_SYSTEM_EXCEPTION(cond,exc_name)                       \
  90         do {                                                            \
  91                 mono_add_patch_info (cfg, code - cfg->native_code,      \
  92                                     MONO_PATCH_INFO_EXC, exc_name);     \
  93                 s390_jcl (code, cond, 0);                               \
  94         } while (0);
  95
  96 #define CHECK_SRCDST_COM                                                \
  97         if (ins->dreg == ins->sreg2) {                                  \
  98                 src2 = ins->sreg1;                                      \
  99         } else {                                                        \
 100                 src2 = ins->sreg2;                                      \
 101                 if (ins->dreg != ins->sreg1) {                          \
 102                         s390_lr  (code, ins->dreg, ins->sreg1);         \
 103                 }                                                       \
 104         }
 105
 106 #define CHECK_SRCDST_NCOM                                               \
 107         if (ins->dreg == ins->sreg2) {                                  \
 108                 src2 = s390_r13;                                        \
 109                 s390_lr  (code, s390_r13, ins->sreg2);                  \
 110         } else {                                                        \
 111                 src2 = ins->sreg2;                                      \
 112         }                                                               \
 113         if (ins->dreg != ins->sreg1) {                                  \
 114                 s390_lr  (code, ins->dreg, ins->sreg1);                 \
 115         }
 116
 117 #define CHECK_SRCDST_COM_F                                              \
 118         if (ins->dreg == ins->sreg2) {                                  \
 119                 src2 = ins->sreg1;                                      \
 120         } else {                                                        \
 121                 src2 = ins->sreg2;                                      \
 122                 if (ins->dreg != ins->sreg1) {                          \
 123                         s390_ldr (code, ins->dreg, ins->sreg1);         \
 124                 }                                                       \
 125         }
 126
 127 #define CHECK_SRCDST_NCOM_F                                             \
 128         if (ins->dreg == ins->sreg2) {                                  \
 129                 src2 = s390_f15;                                        \
 130                 s390_ldr (code, s390_r13, ins->sreg2);                  \
 131         } else {                                                        \
 132                 src2 = ins->sreg2;                                      \
 133         }                                                               \
 134         if (ins->dreg != ins->sreg1) {                                  \
 135                 s390_ldr (code, ins->dreg, ins->sreg1);                 \
 136         }
 137
 138 #undef DEBUG
 139 #define DEBUG(a) if (cfg->verbose_level > 1) a
 140
 141 #define MAX_EXC 16
 142
 143 #define S390_TRACE_STACK_SIZE (5*sizeof(gint32)+3*sizeof(gdouble))
 144
 145 #define MAX (a, b) ((a) > (b) ? (a) : (b))
 146
 147 /*========================= End of Defines =========================*/
 148
 149 /*------------------------------------------------------------------*/
 150 /*                 I n c l u d e s                                  */
 151 /*------------------------------------------------------------------*/
 152
 153 #include "mini.h"
 154 #include <string.h>
 155
 156 #include <mono/metadata/appdomain.h>
 157 #include <mono/metadata/debug-helpers.h>
 158 #include <mono/metadata/profiler-private.h>
 159 #include <mono/utils/mono-math.h>
 160
 161 #include "mini-s390.h"
 162 #include "inssel.h"
 163 #include "cpu-s390.h"
 164 #include "jit-icalls.h"
 165
 166 /*========================= End of Includes ========================*/
 167
 168 /*------------------------------------------------------------------*/
 169 /*                 T y p e d e f s                                  */
 170 /*------------------------------------------------------------------*/
 171
 172 typedef struct {
 173         guint stack_size,
 174               local_size,
 175               code_size,
 176               parm_size,
 177               offset,
 178               offStruct,
 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_R4,
 192         SAVE_R8
 193 };
 194
 195 typedef struct InstList InstList;
 196
 197 struct InstList {
 198         InstList *prev;
 199         InstList *next;
 200         MonoInst *data;
 201 };
 202
 203 typedef enum {
 204         RegTypeGeneral,
 205         RegTypeBase,
 206         RegTypeFP,
 207         RegTypeStructByVal,
 208         RegTypeStructByAddr
 209 } ArgStorage;
 210
 211 typedef struct {
 212         gint32  offset;         /* offset from caller's stack */
 213         gint32  offparm;        /* offset from callee's stack */
 214         guint16 vtsize;         /* in param area */
 215         guint8  reg;
 216         ArgStorage regtype;             /* See RegType* */
 217         guint32 size;           /* Size of structure used by RegTypeStructByVal */
 218 } ArgInfo;
 219
 220 typedef struct {
 221         int nargs;
 222         int lastgr;
 223         guint32 stack_usage;
 224         guint32 struct_ret;
 225         ArgInfo ret;
 226         ArgInfo sigCookie;
 227         size_data sz;
 228         ArgInfo args [1];
 229 } CallInfo;
 230
 231 typedef struct {
 232         gint32  gr[5];          /* R2-R6                            */
 233         gdouble fp[3];          /* F0-F2                            */
 234 } __attribute__ ((packed)) RegParm;
 235
 236 /*========================= End of Typedefs ========================*/
 237
 238 /*------------------------------------------------------------------*/
 239 /*                   P r o t o t y p e s                            */
 240 /*------------------------------------------------------------------*/
 241
 242 static void indent (int);
 243 static guint8 * backUpStackPtr(MonoCompile *, guint8 *, gint);
 244 static void decodeParm (MonoType *, void *, int);
 245 static void enter_method (MonoMethod *, RegParm *, char *);
 246 static void leave_method (MonoMethod *, ...);
 247 static gboolean is_regsize_var (MonoType *);
 248 static inline void add_general (guint *, size_data *, ArgInfo *, gboolean);
 249 static inline void add_stackParm (guint *, size_data *, ArgInfo *, gint);
 250 static inline void add_float (guint *, size_data *, ArgInfo *);
 251 static CallInfo * get_call_info (MonoCompile *, MonoMemPool *, MonoMethodSignature *, gboolean);
 252 static guchar * emit_float_to_int (MonoCompile *, guchar *, int, int, int, gboolean);
 253 gpointer mono_arch_get_lmf_addr (void);
 254 static guint8 * emit_load_volatile_registers(guint8 *, MonoCompile *);
 255 static void emit_sig_cookie (MonoCompile *, MonoCallInst *, CallInfo *, int);
 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 gboolean tls_offset_inited = FALSE;
 268
 269 static int appdomain_tls_offset = -1,
 270            thread_tls_offset = -1;
 271
 272 pthread_key_t lmf_addr_key;
 273
 274 gboolean lmf_addr_key_inited = FALSE;
 275
 276 #if 0
 277
 278 extern __thread MonoDomain *tls_appdomain;
 279 extern __thread MonoThread *tls_current_object;
 280 extern __thread gpointer   mono_lmf_addr;
 281
 282 #endif
 283
 284 /*====================== End of Global Variables ===================*/
 285
 286 /*------------------------------------------------------------------*/
 287 /*                                                                  */
 288 /* Name         - mono_arch_regname                                 */
 289 /*                                                                  */
 290 /* Function     - Returns the name of the register specified by     */
 291 /*                the input parameter.                              */
 292 /*                                                                  */
 293 /*------------------------------------------------------------------*/
 294
 295 const char*
 296 mono_arch_regname (int reg) {
 297         static const char * rnames[] = {
 298                 "s390_r0", "s390_sp", "s390_r2", "s390_r3", "s390_r4",
 299                 "s390_r5", "s390_r6", "s390_r7", "s390_r8", "s390_r9",
 300                 "s390_r10", "s390_r11", "s390_r12", "s390_r13", "s390_r14",
 301                 "s390_r15"
 302         };
 303
 304         if (reg >= 0 && reg < 16)
 305                 return rnames [reg];
 306         else
 307                 return "unknown";
 308 }
 309
 310 /*========================= End of Function ========================*/
 311
 312 /*------------------------------------------------------------------*/
 313 /*                                                                  */
 314 /* Name         - mono_arch_fregname                                */
 315 /*                                                                  */
 316 /* Function     - Returns the name of the register specified by     */
 317 /*                the input parameter.                              */
 318 /*                                                                  */
 319 /*------------------------------------------------------------------*/
 320
 321 const char*
 322 mono_arch_fregname (int reg) {
 323         static const char * rnames[] = {
 324                 "s390_f0", "s390_f1", "s390_f2", "s390_f3", "s390_f4",
 325                 "s390_f5", "s390_f6", "s390_f7", "s390_f8", "s390_f9",
 326                 "s390_f10", "s390_f11", "s390_f12", "s390_f13", "s390_f14",
 327                 "s390_f15"
 328         };
 329
 330         if (reg >= 0 && reg < 16)
 331                 return rnames [reg];
 332         else
 333                 return "unknown";
 334 }
 335
 336 /*========================= End of Function ========================*/
 337
 338 /*------------------------------------------------------------------*/
 339 /*                                                                  */
 340 /* Name         - arch_get_argument_info                            */
 341 /*                                                                  */
 342 /* Function     - Gathers information on parameters such as size,   */
 343 /*                alignment, and padding. arg_info should be large  */
 344 /*                enough to hold param_count + 1 entries.           */
 345 /*                                                                  */
 346 /* Parameters   - @csig - Method signature                          */
 347 /*                @param_count - No. of parameters to consider      */
 348 /*                @arg_info - An array to store the result info     */
 349 /*                                                                  */
 350 /* Returns      - Size of the activation frame                      */
 351 /*                                                                  */
 352 /*------------------------------------------------------------------*/
 353
 354 int
 355 mono_arch_get_argument_info (MonoMethodSignature *csig,
 356                              int param_count,
 357                              MonoJitArgumentInfo *arg_info)
 358 {
 359         int k, frame_size = 0;
 360         int size, align, pad;
 361         int offset = 8;
 362
 363         if (MONO_TYPE_ISSTRUCT (csig->ret)) {
 364                 frame_size += sizeof (gpointer);
 365                 offset += 4;
 366         }
 367
 368         arg_info [0].offset = offset;
 369
 370         if (csig->hasthis) {
 371                 frame_size += sizeof (gpointer);
 372                 offset += 4;
 373         }
 374
 375         arg_info [0].size = frame_size;
 376
 377         for (k = 0; k < param_count; k++) {
 378
 379                 if (csig->pinvoke)
 380                         size = mono_type_native_stack_size (csig->params [k], &align);
 381                 else
 382                         size = mini_type_stack_size (NULL, csig->params [k], &align);
 383
 384                 frame_size += pad = (align - (frame_size & (align - 1))) & (align - 1);
 385                 arg_info [k].pad = pad;
 386                 frame_size += size;
 387                 arg_info [k + 1].pad = 0;
 388                 arg_info [k + 1].size = size;
 389                 offset += pad;
 390                 arg_info [k + 1].offset = offset;
 391                 offset += size;
 392         }
 393
 394         align = MONO_ARCH_FRAME_ALIGNMENT;
 395         frame_size += pad = (align - (frame_size & (align - 1))) & (align - 1);
 396         arg_info [k].pad = pad;
 397
 398         return frame_size;
 399 }
 400
 401 /*========================= End of Function ========================*/
 402
 403 /*------------------------------------------------------------------*/
 404 /*                                                                  */
 405 /* Name         - retFitsInReg.                                     */
 406 /*                                                                  */
 407 /* Function     - Determines if a value can be returned in one or   */
 408 /*                two registers.                                    */
 409 /*                                                                  */
 410 /*------------------------------------------------------------------*/
 411
 412 static inline gboolean
 413 retFitsInReg(guint32 size)
 414 {
 415         switch (size) {
 416                 case 0:
 417                 case 1:
 418                 case 2:
 419                 case 4:
 420                 case 8:
 421                         return (TRUE);
 422                 break;
 423                 default:
 424                         return (FALSE);
 425         }
 426 }
 427
 428 /*========================= End of Function ========================*/
 429
 430 /*------------------------------------------------------------------*/
 431 /*                                                                  */
 432 /* Name         - backStackPtr.                                     */
 433 /*                                                                  */
 434 /* Function     - Restore Stack Pointer to previous frame.          */
 435 /*                                                                  */
 436 /*------------------------------------------------------------------*/
 437
 438 static inline guint8 *
 439 backUpStackPtr(MonoCompile *cfg, guint8 *code, gint framePtr)
 440 {
 441         int stackSize = cfg->stack_usage;
 442
 443         if (s390_is_uimm16 (cfg->stack_usage)) {
 444                 s390_ahi  (code, framePtr, cfg->stack_usage);
 445         } else {
 446                 while (stackSize > 32767) {
 447                         s390_ahi  (code, framePtr, 32767);
 448                         stackSize -= 32767;
 449                 }
 450                 s390_ahi  (code, framePtr, stackSize);
 451         }
 452         return (code);
 453 }
 454
 455 /*========================= End of Function ========================*/
 456
 457 /*------------------------------------------------------------------*/
 458 /*                                                                  */
 459 /* Name         - indent                                            */
 460 /*                                                                  */
 461 /* Function     - Perform nice indenting to current level           */
 462 /*                                                                  */
 463 /*------------------------------------------------------------------*/
 464
 465 static void
 466 indent (int diff) {
 467         int v;
 468         if (diff < 0)
 469                 indent_level += diff;
 470         v = indent_level;
 471         printf("[%3d] ",v);
 472         while (v-- > 0) {
 473                 printf (". ");
 474         }
 475         if (diff > 0)
 476                 indent_level += diff;
 477 }
 478
 479 /*========================= End of Function ========================*/
 480
 481 /*------------------------------------------------------------------*/
 482 /*                                                                  */
 483 /* Name         - decodeParm                                        */
 484 /*                                                                  */
 485 /* Function     - Decode a parameter for the trace.                 */
 486 /*                                                                  */
 487 /*------------------------------------------------------------------*/
 488
 489 static void
 490 decodeParm(MonoType *type, void *curParm, int size)
 491 {
 492         guint32 simpleType;
 493
 494         if (type->byref) {
 495                 printf("[BYREF:%p], ", *((char **) curParm));
 496         } else {
 497                 simpleType = mono_type_get_underlying_type(type)->type;
 498 enum_parmtype:
 499                 switch (simpleType) {
 500                         case MONO_TYPE_I :
 501                                 printf ("[INTPTR:%p], ", *((int **) curParm));
 502                                 break;
 503                         case MONO_TYPE_U :
 504                                 printf ("[UINTPTR:%p], ", *((int **) curParm));
 505                                 break;
 506                         case MONO_TYPE_BOOLEAN :
 507                                 printf ("[BOOL:%d], ", *((int *) curParm));
 508                                 break;
 509                         case MONO_TYPE_CHAR :
 510                                 printf ("[CHAR:%c], ", *((int *) curParm));
 511                                 break;
 512                         case MONO_TYPE_I1 :
 513                                 printf ("[INT1:%d], ", *((int *) curParm));
 514                                 break;
 515                         case MONO_TYPE_I2 :
 516                                 printf ("[INT2:%d], ", *((int *) curParm));
 517                                 break;
 518                         case MONO_TYPE_I4 :
 519                                 printf ("[INT4:%d], ", *((int *) curParm));
 520                                 break;
 521                         case MONO_TYPE_U1 :
 522                                 printf ("[UINT1:%u], ", *((unsigned int *) curParm));
 523                                 break;
 524                         case MONO_TYPE_U2 :
 525                                 printf ("[UINT2:%u], ", *((guint16 *) curParm));
 526                                 break;
 527                         case MONO_TYPE_U4 :
 528                                 printf ("[UINT4:%u], ", *((guint32 *) curParm));
 529                                 break;
 530                         case MONO_TYPE_U8 :
 531                                 printf ("[UINT8:%llu], ", *((guint64 *) curParm));
 532                                 break;
 533                         case MONO_TYPE_STRING : {
 534                                 MonoString *s = *((MonoString **) curParm);
 535                                 if (s) {
 536                                         g_assert (((MonoObject *) s)->vtable->klass == mono_defaults.string_class);
 537                                         printf("[STRING:%p:%s], ", s, mono_string_to_utf8(s));
 538                                 } else {
 539                                         printf("[STRING:null], ");
 540                                 }
 541                                 break;
 542                         }
 543                         case MONO_TYPE_CLASS :
 544                         case MONO_TYPE_OBJECT : {
 545                                 MonoObject *obj = *((MonoObject **) curParm);
 546                                 MonoClass *class;
 547                                 if ((obj) && (obj->vtable)) {
 548                                         printf("[CLASS/OBJ:");
 549                                         class = obj->vtable->klass;
 550                                         printf("%p [%p] ",obj,curParm);
 551 //                                      if (class == mono_defaults.string_class) {
 552 //                                              printf("[STRING:%p:%s]",
 553 //                                                     *obj, mono_string_to_utf8 (obj));
 554 //                                      } else if (class == mono_defaults.int32_class) {
 555 //                                              printf("[INT32:%p:%d]",
 556 //                                                      obj, *(gint32 *)((char *)obj + sizeof (MonoObject)));
 557 //                                      } else
 558 //                                              printf("[%s.%s:%p]",
 559 //                                                     class->name_space, class->name, obj);
 560                                         printf("], ");
 561                                 } else {
 562                                         printf("[OBJECT:null], ");
 563                                 }
 564                                 break;
 565                         }
 566                         case MONO_TYPE_PTR :
 567                                 printf("[PTR:%p], ", *((gpointer **) (curParm)));
 568                                 break;
 569                         case MONO_TYPE_FNPTR :
 570                                 printf("[FNPTR:%p], ", *((gpointer **) (curParm)));
 571                                 break;
 572                         case MONO_TYPE_ARRAY :
 573                                 printf("[ARRAY:%p], ", *((gpointer **) (curParm)));
 574                                 break;
 575                         case MONO_TYPE_SZARRAY :
 576                                 printf("[SZARRAY:%p], ", *((gpointer **) (curParm)));
 577                                 break;
 578                         case MONO_TYPE_I8 :
 579                                 printf("[INT8:%lld], ", *((gint64 *) (curParm)));
 580                                 break;
 581                         case MONO_TYPE_R4 :
 582                                 printf("[FLOAT4:%g], ", *((double *) (curParm)));
 583                                 break;
 584                         case MONO_TYPE_R8 :
 585                                 printf("[FLOAT8:%g], ", *((double *) (curParm)));
 586                                 break;
 587                         case MONO_TYPE_VALUETYPE : {
 588                                 int i;
 589                                 MonoMarshalType *info;
 590
 591                                 if (type->data.klass->enumtype) {
 592                                         simpleType = type->data.klass->enum_basetype->type;
 593                                         printf("{VALUETYPE} - ");
 594                                         goto enum_parmtype;
 595                                 }
 596
 597                                 info = mono_marshal_load_type_info (type->data.klass);
 598
 599                                 if ((info->native_size == sizeof(float)) &&
 600                                     (info->num_fields  == 1) &&
 601                                     (info->fields[0].field->type->type == MONO_TYPE_R4)) {
 602                                                 printf("[FLOAT4:%f], ", *((float *) (curParm)));
 603                                         break;
 604                                 }
 605
 606                                 if ((info->native_size == sizeof(double)) &&
 607                                     (info->num_fields  == 1) &&
 608                                     (info->fields[0].field->type->type == MONO_TYPE_R8)) {
 609                                         printf("[FLOAT8:%g], ", *((double *) (curParm)));
 610                                         break;
 611                                 }
 612
 613                                 printf("[VALUETYPE:");
 614                                 for (i = 0; i < size; i++)
 615                                         printf("%02x,", *((guint8 *)curParm+i));
 616                                 printf("]");
 617                                 break;
 618                         }
 619                         case MONO_TYPE_TYPEDBYREF: {
 620                                 int i;
 621                                 printf("[TYPEDBYREF:");
 622                                 for (i = 0; i < size; i++)
 623                                         printf("%02x,", *((guint8 *)curParm+i));
 624                                 printf("]");
 625                                 break;
 626                         }
 627                         default :
 628                                 printf("[?? - %d], ",simpleType);
 629                 }
 630         }
 631 }
 632
 633 /*========================= End of Function ========================*/
 634
 635 // static int lc = 0;
 636
 637 /*------------------------------------------------------------------*/
 638 /*                                                                  */
 639 /* Name         - enter_method                                      */
 640 /*                                                                  */
 641 /* Function     - Perform tracing of the entry to the current       */
 642 /*                method.                                           */
 643 /*                                                                  */
 644 /*------------------------------------------------------------------*/
 645
 646 static void
 647 enter_method (MonoMethod *method, RegParm *rParm, char *sp)
 648 {
 649         int i, oParm = 0, iParm = 0;
 650         MonoObject *obj;
 651         MonoMethodSignature *sig;
 652         char *fname;
 653         guint32 ip;
 654         CallInfo *cinfo;
 655         ArgInfo *ainfo;
 656         void *curParm;
 657
 658         fname = mono_method_full_name (method, TRUE);
 659         indent (1);
 660         printf ("ENTER: %s(", fname);
 661         g_free (fname);
 662
 663         ip  = (*(guint32 *) (sp+S390_RET_ADDR_OFFSET)) & 0x7fffffff;
 664         printf (") ip: %p sp: %p - ", (gpointer) ip, sp);
 665
 666         if (rParm == NULL)
 667                 return;
 668
 669         sig = mono_method_signature (method);
 670
 671         cinfo = get_call_info (NULL, NULL, sig, sig->pinvoke);
 672
 673         if (cinfo->struct_ret) {
 674                 printf ("[STRUCTRET:%p], ", (gpointer) rParm->gr[0]);
 675                 iParm = 1;
 676         }
 677
 678         if (sig->hasthis) {
 679                 gpointer *this = (gpointer *) rParm->gr[iParm];
 680                 obj = (MonoObject *) this;
 681                 if (method->klass->valuetype) {
 682                         if (obj) {
 683                                 printf("this:[value:%p:%08x], ",
 684                                        this, *((guint32 *)(this+sizeof(MonoObject))));
 685                         } else
 686                                 printf ("this:[NULL], ");
 687                 } else {
 688                         if (obj) {
 689 //                              class = obj->vtable->klass;
 690 //                              if (class == mono_defaults.string_class) {
 691 //                                      printf ("this:[STRING:%p:%s], ",
 692 //                                              obj, mono_string_to_utf8 ((MonoString *)obj));
 693 //                              } else {
 694 //                                      printf ("this:%p[%s.%s], ",
 695 //                                              obj, class->name_space, class->name);
 696 //                              }
 697 printf("this:%p, ",obj);
 698                         } else
 699                                 printf ("this:NULL, ");
 700                 }
 701                 oParm++;
 702         }
 703
 704         for (i = 0; i < sig->param_count; ++i) {
 705                 ainfo = &cinfo->args[i + oParm];
 706                 switch (ainfo->regtype) {
 707                         case RegTypeGeneral :
 708                                 decodeParm(sig->params[i], &(rParm->gr[ainfo->reg-2]), ainfo->size);
 709                                 break;
 710                         case RegTypeFP :
 711                                 decodeParm(sig->params[i], &(rParm->fp[ainfo->reg]), ainfo->size);
 712                                 break;
 713                         case RegTypeBase :
 714                                 decodeParm(sig->params[i], sp+ainfo->offset, ainfo->size);
 715                                 break;
 716                         case RegTypeStructByVal :
 717                                 if (ainfo->reg != STK_BASE)
 718                                         curParm = &(rParm->gr[ainfo->reg-2]);
 719                                 else
 720                                         curParm = sp+ainfo->offset;
 721
 722                                 if (retFitsInReg (ainfo->vtsize))
 723                                         decodeParm(sig->params[i],
 724                                                    curParm,
 725                                                    ainfo->size);
 726                                 else
 727                                         decodeParm(sig->params[i],
 728                                                    *((char **) curParm),
 729                                                    ainfo->vtsize);
 730                                 break;
 731                         case RegTypeStructByAddr :
 732                                 if (ainfo->reg != STK_BASE)
 733                                         curParm = &(rParm->gr[ainfo->reg-2]);
 734                                 else
 735                                         curParm = sp+ainfo->offset;
 736
 737                                 decodeParm(sig->params[i],
 738                                            *((char **) curParm),
 739                                            ainfo->vtsize);
 740                                 break;
 741
 742                         default :
 743                                 printf("???, ");
 744                 }
 745         }
 746         printf("\n");
 747         g_free(cinfo);
 748 }
 749
 750 /*========================= End of Function ========================*/
 751
 752 /*------------------------------------------------------------------*/
 753 /*                                                                  */
 754 /* Name         - leave_method                                      */
 755 /*                                                                  */
 756 /* Function     -                                                   */
 757 /*                                                                  */
 758 /*------------------------------------------------------------------*/
 759
 760 static void
 761 leave_method (MonoMethod *method, ...)
 762 {
 763         MonoType *type;
 764         char *fname;
 765         guint32 ip;
 766         va_list ap;
 767
 768         va_start(ap, method);
 769
 770         fname = mono_method_full_name (method, TRUE);
 771         indent (-1);
 772         printf ("LEAVE: %s", fname);
 773         g_free (fname);
 774
 775         type = mono_method_signature (method)->ret;
 776
 777 handle_enum:
 778         switch (type->type) {
 779         case MONO_TYPE_VOID:
 780                 break;
 781         case MONO_TYPE_BOOLEAN: {
 782                 int val = va_arg (ap, int);
 783                 if (val)
 784                         printf ("[TRUE:%d]", val);
 785                 else
 786                         printf ("[FALSE]");
 787
 788                 break;
 789         }
 790         case MONO_TYPE_CHAR: {
 791                 int val = va_arg (ap, int);
 792                 printf ("[CHAR:%d]", val);
 793                 break;
 794         }
 795         case MONO_TYPE_I1: {
 796                 int val = va_arg (ap, int);
 797                 printf ("[INT1:%d]", val);
 798                 break;
 799         }
 800         case MONO_TYPE_U1: {
 801                 int val = va_arg (ap, int);
 802                 printf ("[UINT1:%d]", val);
 803                 break;
 804         }
 805         case MONO_TYPE_I2: {
 806                 int val = va_arg (ap, int);
 807                 printf ("[INT2:%d]", val);
 808                 break;
 809         }
 810         case MONO_TYPE_U2: {
 811                 int val = va_arg (ap, int);
 812                 printf ("[UINT2:%d]", val);
 813                 break;
 814         }
 815         case MONO_TYPE_I4: {
 816                 int val = va_arg (ap, int);
 817                 printf ("[INT4:%d]", val);
 818                 break;
 819         }
 820         case MONO_TYPE_U4: {
 821                 int val = va_arg (ap, int);
 822                 printf ("[UINT4:%d]", val);
 823                 break;
 824         }
 825         case MONO_TYPE_I: {
 826                 int val = va_arg (ap, int);
 827                 printf ("[INT:%d]", val);
 828                 printf("]");
 829                 break;
 830         }
 831         case MONO_TYPE_U: {
 832                 int val = va_arg (ap, int);
 833                 printf ("[UINT:%d]", val);
 834                 printf("]");
 835                 break;
 836         }
 837         case MONO_TYPE_STRING: {
 838                 MonoString *s = va_arg (ap, MonoString *);
 839 ;
 840                 if (s) {
 841                         g_assert (((MonoObject *)s)->vtable->klass == mono_defaults.string_class);
 842                         printf ("[STRING:%p:%s]", s, mono_string_to_utf8 (s));
 843                 } else
 844                         printf ("[STRING:null], ");
 845                 break;
 846         }
 847         case MONO_TYPE_CLASS:
 848         case MONO_TYPE_OBJECT: {
 849                 MonoObject *o = va_arg (ap, MonoObject *);
 850
 851 //              if ((o) && (o->vtable)) {
 852 //                      if (o->vtable->klass == mono_defaults.boolean_class) {
 853 //                              printf ("[BOOLEAN:%p:%d]", o, *((guint8 *)o + sizeof (MonoObject)));
 854 //                      } else if  (o->vtable->klass == mono_defaults.int32_class) {
 855 //                              printf ("[INT32:%p:%d]", o, *((gint32 *)((char *)o + sizeof (MonoObject))));
 856 //                      } else if  (o->vtable->klass == mono_defaults.int64_class) {
 857 //                              printf ("[INT64:%p:%lld]", o, *((gint64 *)((char *)o + sizeof (MonoObject))));
 858 //                      } else
 859 //                              printf ("[%s.%s:%p]", o->vtable->klass->name_space, o->vtable->klass->name, o);
 860 //              } else
 861                         printf ("[OBJECT:%p]", o);
 862
 863                 break;
 864         }
 865         case MONO_TYPE_PTR:
 866         case MONO_TYPE_FNPTR:
 867         case MONO_TYPE_ARRAY:
 868         case MONO_TYPE_SZARRAY: {
 869                 gpointer p = va_arg (ap, gpointer);
 870                 printf ("[result=%p]", p);
 871                 break;
 872         }
 873         case MONO_TYPE_I8: {
 874                 gint64 l =  va_arg (ap, gint64);
 875                 printf ("[LONG:%lld]", l);
 876                 break;
 877         }
 878         case MONO_TYPE_U8: {
 879                 guint64 l =  va_arg (ap, guint64);
 880                 printf ("[ULONG:%llu]", l);
 881                 break;
 882         }
 883         case MONO_TYPE_R4: {
 884                 double f;
 885                 f = va_arg (ap, double);
 886                 printf ("[FLOAT4:%g]\n", f);
 887                 break;
 888         }
 889         case MONO_TYPE_R8: {
 890                 double f = va_arg (ap, double);
 891                 printf ("[FLOAT8:%g]\n", f);
 892                 break;
 893         }
 894         case MONO_TYPE_VALUETYPE: {
 895                 MonoMarshalType *info;
 896                 if (type->data.klass->enumtype) {
 897                         type = type->data.klass->enum_basetype;
 898                         goto handle_enum;
 899                 } else {
 900                         guint8 *p = va_arg (ap, gpointer);
 901                         int j, size, align;
 902
 903                         info = mono_marshal_load_type_info (type->data.klass);
 904
 905                         if ((info->native_size == sizeof(float)) &&
 906                             (info->num_fields  == 1) &&
 907                             (info->fields[0].field->type->type == MONO_TYPE_R4)) {
 908                                 double f = va_arg (ap, double);
 909                                 printf("[FLOAT4:%g]\n", (double) f);
 910                                 break;
 911                         }
 912
 913                         if ((info->native_size == sizeof(double)) &&
 914                             (info->num_fields  == 1) &&
 915                             (info->fields[0].field->type->type == MONO_TYPE_R8)) {
 916                                 double f = va_arg (ap, double);
 917                                 printf("[FLOAT8:%g]\n", f);
 918                                 break;
 919                         }
 920
 921                         size = mono_type_size (type, &align);
 922                         switch (size) {
 923                         case 1:
 924                         case 2:
 925                         case 4:
 926                         case 8:
 927                                 printf ("[");
 928                                 for (j = 0; p && j < size; j++)
 929                                         printf ("%02x,", p [j]);
 930                                 printf ("]\n");
 931                                 break;
 932                         default:
 933                                 printf ("[VALUERET]\n");
 934                         }
 935                 }
 936                 break;
 937         }
 938         case MONO_TYPE_TYPEDBYREF: {
 939                 guint8 *p = va_arg (ap, gpointer);
 940                 int j, size, align;
 941                 size = mono_type_size (type, &align);
 942                 switch (size) {
 943                 case 1:
 944                 case 2:
 945                 case 4:
 946                 case 8:
 947                         printf ("[");
 948                         for (j = 0; p && j < size; j++)
 949                                 printf ("%02x,", p [j]);
 950                         printf ("]\n");
 951                         break;
 952                 default:
 953                         printf ("[TYPEDBYREF]\n");
 954                 }
 955         }
 956                 break;
 957         default:
 958                 printf ("(unknown return type %x)",
 959                         mono_method_signature (method)->ret->type);
 960         }
 961
 962         ip = ((gint32) __builtin_return_address (0)) & 0x7fffffff;
 963         printf (" ip: %p\n", (gpointer) ip);
 964 }
 965
 966 /*========================= End of Function ========================*/
 967
 968 /*------------------------------------------------------------------*/
 969 /*                                                                  */
 970 /* Name         - mono_arch_cpu_init                                */
 971 /*                                                                  */
 972 /* Function     - Perform CPU specific initialization to execute    */
 973 /*                managed code.                                     */
 974 /*                                                                  */
 975 /*------------------------------------------------------------------*/
 976
 977 void
 978 mono_arch_cpu_init (void)
 979 {
 980         guint mode = 1;
 981
 982         /*--------------------------------------*/
 983         /* Set default rounding mode for FP     */
 984         /*--------------------------------------*/
 985         __asm__ ("SRNM\t%0\n\t"
 986                 : : "m" (mode));
 987 }
 988
 989 /*========================= End of Function ========================*/
 990
 991
 992 /*
 993  * Initialize architecture specific code.
 994  */
 995 void
 996 mono_arch_init (void)
 997 {
 998 }
 999
1000 /*
1001  * Cleanup architecture specific code.
1002  */
1003 void
1004 mono_arch_cleanup (void)
1005 {
1006 }
1007
1008 /*------------------------------------------------------------------*/
1009 /*                                                                  */
1010 /* Name         - mono_arch_cpu_optimizazions                       */
1011 /*                                                                  */
1012 /* Function     - Returns the optimizations supported on this CPU   */
1013 /*                                                                  */
1014 /*------------------------------------------------------------------*/
1015
1016 guint32
1017 mono_arch_cpu_optimizazions (guint32 *exclude_mask)
1018 {
1019         guint32 opts = 0;
1020
1021         /*----------------------------------------------------------*/
1022         /* no s390-specific optimizations yet                       */
1023         /*----------------------------------------------------------*/
1024         *exclude_mask = MONO_OPT_INLINE|MONO_OPT_LINEARS;
1025 //      *exclude_mask = MONO_OPT_INLINE;
1026         return opts;
1027 }
1028
1029 /*========================= End of Function ========================*/
1030
1031 /*------------------------------------------------------------------*/
1032 /*                                                                  */
1033 /* Name         -                                                   */
1034 /*                                                                  */
1035 /* Function     -                                                   */
1036 /*                                                                  */
1037 /*------------------------------------------------------------------*/
1038
1039 static gboolean
1040 is_regsize_var (MonoType *t) {
1041         if (t->byref)
1042                 return TRUE;
1043         switch (mono_type_get_underlying_type (t)->type) {
1044         case MONO_TYPE_I4:
1045         case MONO_TYPE_U4:
1046         case MONO_TYPE_I:
1047         case MONO_TYPE_U:
1048         case MONO_TYPE_PTR:
1049         case MONO_TYPE_FNPTR:
1050                 return TRUE;
1051         case MONO_TYPE_OBJECT:
1052         case MONO_TYPE_STRING:
1053         case MONO_TYPE_CLASS:
1054         case MONO_TYPE_SZARRAY:
1055         case MONO_TYPE_ARRAY:
1056                 return FALSE;
1057         case MONO_TYPE_VALUETYPE:
1058                 if (t->data.klass->enumtype)
1059                         return is_regsize_var (t->data.klass->enum_basetype);
1060                 return FALSE;
1061         }
1062         return FALSE;
1063 }
1064
1065 /*========================= End of Function ========================*/
1066
1067 /*------------------------------------------------------------------*/
1068 /*                                                                  */
1069 /* Name         - mono_arch_get_allocatable_int_vars                */
1070 /*                                                                  */
1071 /* Function     -                                                   */
1072 /*                                                                  */
1073 /*------------------------------------------------------------------*/
1074
1075 GList *
1076 mono_arch_get_allocatable_int_vars (MonoCompile *cfg)
1077 {
1078         GList *vars = NULL;
1079         int i;
1080
1081         for (i = 0; i < cfg->num_varinfo; i++) {
1082                 MonoInst *ins = cfg->varinfo [i];
1083                 MonoMethodVar *vmv = MONO_VARINFO (cfg, i);
1084
1085                 /* unused vars */
1086                 if (vmv->range.first_use.abs_pos >= vmv->range.last_use.abs_pos)
1087                         continue;
1088
1089                 if (ins->flags & (MONO_INST_VOLATILE|MONO_INST_INDIRECT) ||
1090                     (ins->opcode != OP_LOCAL && ins->opcode != OP_ARG))
1091                         continue;
1092
1093                 /* we can only allocate 32 bit values */
1094                 if (is_regsize_var (ins->inst_vtype)) {
1095                         g_assert (MONO_VARINFO (cfg, i)->reg == -1);
1096                         g_assert (i == vmv->idx);
1097                         vars = mono_varlist_insert_sorted (cfg, vars, vmv, FALSE);
1098                 }
1099         }
1100
1101         return vars;
1102 }
1103
1104 /*========================= End of Function ========================*/
1105
1106 /*------------------------------------------------------------------*/
1107 /*                                                                  */
1108 /* Name         - mono_arch_global_int_regs                         */
1109 /*                                                                  */
1110 /* Function     - Return a list of usable integer registers.        */
1111 /*                                                                  */
1112 /*------------------------------------------------------------------*/
1113
1114 GList *
1115 mono_arch_get_global_int_regs (MonoCompile *cfg)
1116 {
1117         GList *regs = NULL;
1118         MonoMethodHeader *header;
1119         int i, top = 13;
1120
1121         header = mono_method_get_header (cfg->method);
1122         if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
1123                 cfg->frame_reg = s390_r11;
1124
1125         for (i = 8; i < top; ++i) {
1126                 if (cfg->frame_reg != i)
1127                         regs = g_list_prepend (regs, GUINT_TO_POINTER (i));
1128         }
1129
1130         return regs;
1131 }
1132
1133 /*========================= End of Function ========================*/
1134
1135 /*------------------------------------------------------------------*/
1136 /*                                                                  */
1137 /* Name         -  mono_arch_flush_icache                           */
1138 /*                                                                  */
1139 /* Function     -  Flush the CPU icache.                            */
1140 /*                                                                  */
1141 /*------------------------------------------------------------------*/
1142
1143 void
1144 mono_arch_flush_icache (guint8 *code, gint size)
1145 {
1146 }
1147
1148 /*========================= End of Function ========================*/
1149
1150 /*------------------------------------------------------------------*/
1151 /*                                                                  */
1152 /* Name         - add_general                                       */
1153 /*                                                                  */
1154 /* Function     - Determine code and stack size incremements for a  */
1155 /*                parameter.                                        */
1156 /*                                                                  */
1157 /*------------------------------------------------------------------*/
1158
1159 static void inline
1160 add_general (guint *gr, size_data *sz, ArgInfo *ainfo, gboolean simple)
1161 {
1162         int disp;
1163
1164         if (simple) {
1165                 if (*gr > S390_LAST_ARG_REG) {
1166                         sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1167                         ainfo->offset   = sz->stack_size;
1168                         ainfo->reg      = STK_BASE;
1169                         ainfo->regtype  = RegTypeBase;
1170                         sz->stack_size += sizeof(int);
1171                         sz->local_size += sizeof(int);
1172                         sz->offStruct  += sizeof(int);
1173                         sz->code_size  += 12;
1174                 } else {
1175                         ainfo->reg      = *gr;
1176                         sz->code_size  += 8;
1177                 }
1178         } else {
1179                 if (*gr > S390_LAST_ARG_REG - 1) {
1180                         disp            = sz->stack_size;
1181                         sz->stack_size  = S390_ALIGN(sz->stack_size, S390_STACK_ALIGNMENT);
1182                         disp            = sz->stack_size - disp;
1183                         ainfo->offset   = sz->stack_size;
1184                         ainfo->reg      = STK_BASE;
1185                         ainfo->regtype  = RegTypeBase;
1186                         sz->stack_size += sizeof(long long);
1187                         sz->local_size += (sizeof(long long) + disp);
1188                         sz->offStruct  += (sizeof(long long) + disp);
1189                         sz->code_size  += 10;
1190                 } else {
1191                         ainfo->reg      = *gr;
1192                         sz->code_size  += 8;
1193                 }
1194                 (*gr) ++;
1195         }
1196         (*gr) ++;
1197 }
1198
1199 /*========================= End of Function ========================*/
1200
1201 /*------------------------------------------------------------------*/
1202 /*                                                                  */
1203 /* Name         - add_stackParm                                     */
1204 /*                                                                  */
1205 /* Function     - Determine code and stack size incremements for a  */
1206 /*                parameter.                                        */
1207 /*                                                                  */
1208 /*------------------------------------------------------------------*/
1209
1210 static void inline
1211 add_stackParm (guint *gr, size_data *sz, ArgInfo *ainfo, gint size)
1212 {
1213         if (*gr > S390_LAST_ARG_REG) {
1214                 sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1215                 ainfo->reg      = STK_BASE;
1216                 sz->parm_size  += sizeof(gpointer);
1217                 sz->offStruct  += sizeof(gpointer);
1218         } else {
1219                 ainfo->reg      = *gr;
1220         }
1221         (*gr) ++;
1222         ainfo->offset   = sz->stack_size;
1223         ainfo->offparm  = sz->offset;
1224         sz->offset      = S390_ALIGN(sz->offset+size, sizeof(long));
1225         ainfo->size     = size;
1226         ainfo->regtype  = RegTypeStructByAddr;
1227         ainfo->vtsize   = size;
1228         sz->parm_size  += size;
1229 }
1230
1231 /*========================= End of Function ========================*/
1232
1233 /*------------------------------------------------------------------*/
1234 /*                                                                  */
1235 /* Name         - add_float                                         */
1236 /*                                                                  */
1237 /* Function     - Determine code and stack size incremements for a  */
1238 /*                float parameter.                                  */
1239 /*                                                                  */
1240 /*------------------------------------------------------------------*/
1241
1242 static void inline
1243 add_float (guint *fr,  size_data *sz, ArgInfo *ainfo)
1244 {
1245         if ((*fr) <= S390_LAST_FPARG_REG) {
1246                 ainfo->regtype = RegTypeFP;
1247                 ainfo->reg     = *fr;
1248                 sz->code_size += 4;
1249                 (*fr) += 2;
1250         }
1251         else {
1252                 ainfo->offset   = sz->stack_size;
1253                 ainfo->reg      = STK_BASE;
1254                 ainfo->regtype  = RegTypeBase;
1255                 sz->code_size  += 4;
1256                 sz->stack_size += ainfo->size;
1257                 sz->local_size += ainfo->size;
1258                 sz->offStruct  += ainfo->size;
1259         }
1260 }
1261
1262 /*========================= End of Function ========================*/
1263
1264 /*------------------------------------------------------------------*/
1265 /*                                                                  */
1266 /* Name         - get_call_info                                         */
1267 /*                                                                  */
1268 /* Function     - Determine the amount of space required for code   */
1269 /*                and stack. In addition determine starting points  */
1270 /*                for stack-based parameters, and area for struct-  */
1271 /*                ures being returned on the stack.                 */
1272 /*                                                                  */
1273 /*------------------------------------------------------------------*/
1274
1275 static CallInfo *
1276 get_call_info (MonoCompile *cfg, MonoMemPool *mp, MonoMethodSignature *sig, gboolean is_pinvoke)
1277 {
1278         guint i, fr, gr, size;
1279         int nParm = sig->hasthis + sig->param_count;
1280         MonoType *ret_type;
1281         guint32 simpletype, align;
1282         CallInfo *cinfo;
1283         size_data *sz;
1284         MonoGenericSharingContext *gsctx = cfg ? cfg->generic_sharing_context : NULL;
1285
1286         if (mp)
1287                 cinfo = mono_mempool_alloc0 (mp, sizeof (CallInfo) + (sizeof (ArgInfo) * nParm));
1288         else
1289                 cinfo = g_malloc0 (sizeof (CallInfo) + (sizeof (ArgInfo) * nParm));
1290
1291         fr                = 0;
1292         gr                = s390_r2;
1293         nParm             = 0;
1294         cinfo->struct_ret = 0;
1295         sz = &cinfo->sz;
1296         sz->offset        = 0;
1297         sz->offStruct     = S390_MINIMAL_STACK_SIZE;
1298         sz->retStruct     = 0;
1299         sz->stack_size    = S390_MINIMAL_STACK_SIZE;
1300         sz->code_size     = 0;
1301         sz->parm_size     = 0;
1302         sz->local_size    = 0;
1303
1304         /*----------------------------------------------------------*/
1305         /* We determine the size of the return code/stack in case we*/
1306         /* need to reserve a register to be used to address a stack */
1307         /* area that the callee will use.                           */
1308         /*----------------------------------------------------------*/
1309
1310         ret_type = mono_type_get_underlying_type (sig->ret);
1311         ret_type = mini_get_basic_type_from_generic (gsctx, ret_type);
1312         simpletype = ret_type->type;
1313 enum_retvalue:
1314         switch (simpletype) {
1315                 case MONO_TYPE_BOOLEAN:
1316                 case MONO_TYPE_I1:
1317                 case MONO_TYPE_U1:
1318                 case MONO_TYPE_I2:
1319                 case MONO_TYPE_U2:
1320                 case MONO_TYPE_CHAR:
1321                 case MONO_TYPE_I4:
1322                 case MONO_TYPE_U4:
1323                 case MONO_TYPE_I:
1324                 case MONO_TYPE_U:
1325                 case MONO_TYPE_CLASS:
1326                 case MONO_TYPE_OBJECT:
1327                 case MONO_TYPE_SZARRAY:
1328                 case MONO_TYPE_ARRAY:
1329                 case MONO_TYPE_PTR:
1330                 case MONO_TYPE_FNPTR:
1331                 case MONO_TYPE_STRING:
1332                         cinfo->ret.reg = s390_r2;
1333                         sz->code_size += 4;
1334                         break;
1335                 case MONO_TYPE_R4:
1336                 case MONO_TYPE_R8:
1337                         cinfo->ret.reg = s390_f0;
1338                         sz->code_size += 4;
1339                         break;
1340                 case MONO_TYPE_I8:
1341                 case MONO_TYPE_U8:
1342                         cinfo->ret.reg = s390_r2;
1343                         sz->code_size += 4;
1344                         break;
1345                 case MONO_TYPE_GENERICINST:
1346                         if (!mono_type_generic_inst_is_valuetype (sig->ret)) {
1347                                 cinfo->ret.reg = s390_r2;
1348                                 sz->code_size += 4;
1349                                 break;
1350                         }
1351                         /* Fall through */
1352                 case MONO_TYPE_VALUETYPE: {
1353                         MonoClass *klass = mono_class_from_mono_type (sig->ret);
1354                         if (klass->enumtype) {
1355                                 simpletype = klass->enum_basetype->type;
1356                                 goto enum_retvalue;
1357                         }
1358                         if (sig->pinvoke)
1359                                 size = mono_class_native_size (klass, &align);
1360                         else
1361                                 size = mono_class_value_size (klass, &align);
1362
1363                         cinfo->ret.reg    = s390_r2;
1364                         cinfo->struct_ret = 1;
1365                         cinfo->ret.size   = size;
1366                         cinfo->ret.vtsize = size;
1367                         gr++;
1368                         break;
1369                 }
1370                 case MONO_TYPE_TYPEDBYREF:
1371                         size = sizeof (MonoTypedRef);
1372                         cinfo->ret.reg    = s390_r2;
1373                         cinfo->struct_ret = 1;
1374                         cinfo->ret.size   = size;
1375                         cinfo->ret.vtsize = size;
1376                         gr++;
1377                         break;
1378                 case MONO_TYPE_VOID:
1379                         break;
1380                 default:
1381                         g_error ("mini-s390: cannot handle as return value 0x%x (0x%x)", sig->ret->type,simpletype);
1382         }
1383
1384         if (sig->hasthis) {
1385                 add_general (&gr, sz, cinfo->args+nParm, TRUE);
1386                 cinfo->args[nParm].size = sizeof(gpointer);
1387                 nParm++;
1388         }
1389
1390         /*----------------------------------------------------------*/
1391         /* We determine the size of the parameter code and stack    */
1392         /* requirements by checking the types and sizes of the      */
1393         /* parameters.                                              */
1394         /*----------------------------------------------------------*/
1395
1396         for (i = 0; i < sig->param_count; ++i) {
1397                 MonoType *ptype;
1398
1399                 /*--------------------------------------------------*/
1400                 /* Handle vararg type calls. All args are put on    */
1401                 /* the stack.                                       */
1402                 /*--------------------------------------------------*/
1403                 if ((sig->call_convention == MONO_CALL_VARARG) &&
1404                     (i == sig->sentinelpos)) {
1405                         gr = S390_LAST_ARG_REG + 1;
1406                         add_general (&gr, sz, &cinfo->sigCookie, TRUE);
1407                 }
1408
1409                 if (sig->params [i]->byref) {
1410                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1411                         cinfo->args[nParm].size = sizeof(gpointer);
1412                         nParm++;
1413                         continue;
1414                 }
1415
1416                 ptype = mono_type_get_underlying_type (sig->params [i]);
1417                 ptype = mini_get_basic_type_from_generic (gsctx, ptype);
1418                 simpletype = ptype->type;
1419                 switch (simpletype) {
1420                 case MONO_TYPE_BOOLEAN:
1421                 case MONO_TYPE_I1:
1422                 case MONO_TYPE_U1:
1423                         cinfo->args[nParm].size = sizeof(char);
1424                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1425                         nParm++;
1426                         break;
1427                 case MONO_TYPE_I2:
1428                 case MONO_TYPE_U2:
1429                 case MONO_TYPE_CHAR:
1430                         cinfo->args[nParm].size = sizeof(short);
1431                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1432                         nParm++;
1433                         break;
1434                 case MONO_TYPE_I4:
1435                 case MONO_TYPE_U4:
1436                         cinfo->args[nParm].size = sizeof(int);
1437                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1438                         nParm++;
1439                         break;
1440                 case MONO_TYPE_I:
1441                 case MONO_TYPE_U:
1442                 case MONO_TYPE_PTR:
1443                 case MONO_TYPE_FNPTR:
1444                 case MONO_TYPE_CLASS:
1445                 case MONO_TYPE_OBJECT:
1446                 case MONO_TYPE_STRING:
1447                 case MONO_TYPE_SZARRAY:
1448                 case MONO_TYPE_ARRAY:
1449                         cinfo->args[nParm].size = sizeof(gpointer);
1450                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1451                         nParm++;
1452                         break;
1453                 case MONO_TYPE_I8:
1454                 case MONO_TYPE_U8:
1455                         cinfo->args[nParm].size = sizeof(long long);
1456                         add_general (&gr, sz, cinfo->args+nParm, FALSE);
1457                         nParm++;
1458                         break;
1459                 case MONO_TYPE_R4:
1460                         cinfo->args[nParm].size = sizeof(float);
1461                         add_float (&fr, sz, cinfo->args+nParm);
1462                         nParm++;
1463                         break;
1464                 case MONO_TYPE_R8:
1465                         cinfo->args[nParm].size = sizeof(double);
1466                         add_float (&fr, sz, cinfo->args+nParm);
1467                         nParm++;
1468                         break;
1469                 case MONO_TYPE_GENERICINST:
1470                         if (!mono_type_generic_inst_is_valuetype (sig->params [i])) {
1471                                 cinfo->args[nParm].size = sizeof(gpointer);
1472                                 add_general (&gr, sz, cinfo->args+nParm, TRUE);
1473                                 nParm++;
1474                                 break;
1475                         }
1476                         /* Fall through */
1477                 case MONO_TYPE_VALUETYPE: {
1478                         MonoMarshalType *info;
1479                         MonoClass *klass = mono_class_from_mono_type (sig->params [i]);
1480                         if (sig->pinvoke)
1481                                 size = mono_class_native_size (klass, &align);
1482                         else
1483                                 size = mono_class_value_size (klass, &align);
1484
1485                         info = mono_marshal_load_type_info (klass);
1486
1487                         if ((info->native_size == sizeof(float)) &&
1488                             (info->num_fields  == 1) &&
1489                             (info->fields[0].field->type->type == MONO_TYPE_R4)) {
1490                                 cinfo->args[nParm].size = sizeof(float);
1491                                 add_float(&fr, sz, cinfo->args+nParm);
1492                                 break;
1493                         }
1494
1495                         if ((info->native_size == sizeof(double)) &&
1496                             (info->num_fields  == 1) &&
1497                             (info->fields[0].field->type->type == MONO_TYPE_R8)) {
1498                                 cinfo->args[nParm].size = sizeof(double);
1499                                 add_float(&fr, sz, cinfo->args+nParm);
1500                                 break;
1501                         }
1502
1503                         cinfo->args[nParm].vtsize  = 0;
1504                         cinfo->args[nParm].size    = 0;
1505
1506                         switch (size) {
1507                                 /*----------------------------------*/
1508                                 /* On S/390, structures of size 1,  */
1509                                 /* 2, 4, and 8 bytes are passed in  */
1510                                 /* (a) register(s).                 */
1511                                 /*----------------------------------*/
1512                                 case 0:
1513                                 case 1:
1514                                 case 2:
1515                                 case 4:
1516                                         add_general(&gr, sz, cinfo->args+nParm, TRUE);
1517                                         cinfo->args[nParm].size    = size;
1518                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1519                                         nParm++;
1520                                         sz->local_size            += sizeof(long);
1521                                         break;
1522                                 case 8:
1523                                         add_general(&gr, sz, cinfo->args+nParm, FALSE);
1524                                         cinfo->args[nParm].size    = sizeof(long long);
1525                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1526                                         nParm++;
1527                                         sz->local_size            += sizeof(long long);
1528                                         break;
1529                                 default:
1530                                         add_stackParm(&gr, sz, cinfo->args+nParm, size);
1531                                         nParm++;
1532                         }
1533                 }
1534                         break;
1535                 case MONO_TYPE_TYPEDBYREF: {
1536                         int size = sizeof (MonoTypedRef);
1537
1538                         cinfo->args[nParm].vtsize  = 0;
1539                         cinfo->args[nParm].size    = 0;
1540
1541                         switch (size) {
1542                                 /*----------------------------------*/
1543                                 /* On S/390, structures of size 1,  */
1544                                 /* 2, 4, and 8 bytes are passed in  */
1545                                 /* (a) register(s).                 */
1546                                 /*----------------------------------*/
1547                                 case 0:
1548                                 case 1:
1549                                 case 2:
1550                                 case 4:
1551                                         add_general(&gr, sz, cinfo->args+nParm, TRUE);
1552                                         cinfo->args[nParm].size    = size;
1553                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1554                                         nParm++;
1555                                         sz->local_size            += sizeof(long);
1556                                         break;
1557                                 case 8:
1558                                         add_general(&gr, sz, cinfo->args+nParm, FALSE);
1559                                         cinfo->args[nParm].size    = sizeof(long long);
1560                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1561                                         nParm++;
1562                                         sz->local_size            += sizeof(long long);
1563                                         break;
1564                                 default:
1565                                         add_stackParm(&gr, sz, cinfo->args+nParm, size);
1566                                         nParm++;
1567                         }
1568                 }
1569                         break;
1570                 default:
1571                         g_error ("Can't trampoline 0x%x", sig->params [i]->type);
1572                 }
1573         }
1574
1575         /*----------------------------------------------------------*/
1576         /* If we are passing a structure back then if it won't be   */
1577         /* in a register(s) then we make room at the end of the     */
1578         /* parameters that may have been placed on the stack        */
1579         /*----------------------------------------------------------*/
1580         if (cinfo->struct_ret) {
1581                 cinfo->ret.offset = sz->stack_size;
1582                 switch (cinfo->ret.size) {
1583                 case 0:
1584                 case 1:
1585                 case 2:
1586                 case 4:
1587                 case 8:
1588                         break;
1589                 default:
1590                         sz->stack_size   += S390_ALIGN(cinfo->ret.size, align);
1591                 }
1592         }
1593
1594         /*----------------------------------------------------------*/
1595         /* Handle the case where there are no implicit arguments    */
1596         /*----------------------------------------------------------*/
1597         if ((sig->call_convention == MONO_CALL_VARARG) &&
1598             (sig->param_count == sig->sentinelpos)) {
1599                 gr = S390_LAST_ARG_REG + 1;
1600                 add_general (&gr, sz, &cinfo->sigCookie, TRUE);
1601         }
1602
1603         cinfo->lastgr   = gr;
1604         sz->stack_size  = sz->stack_size + sz->local_size + sz->parm_size +
1605                           sz->offset;
1606         sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1607
1608         return (cinfo);
1609 }
1610
1611 /*========================= End of Function ========================*/
1612
1613 /*------------------------------------------------------------------*/
1614 /*                                                                  */
1615 /* Name         - mono_arch_allocate_vars                           */
1616 /*                                                                  */
1617 /* Function     - Set var information according to the calling      */
1618 /*                convention for S/390. The local var stuff should  */
1619 /*                most likely be split in another method.           */
1620 /*                                                                  */
1621 /* Parameter    - @m - Compile unit.                                */
1622 /*                                                                  */
1623 /*------------------------------------------------------------------*/
1624
1625 void
1626 mono_arch_allocate_vars (MonoCompile *cfg)
1627 {
1628         MonoMethodSignature *sig;
1629         MonoMethodHeader *header;
1630         MonoInst *inst;
1631         CallInfo *cinfo;
1632         int iParm, iVar, offset, size, align, curinst;
1633         int frame_reg = STK_BASE;
1634         int sArg, eArg;
1635
1636         header  = mono_method_get_header (cfg->method);
1637
1638         cfg->flags |= MONO_CFG_HAS_SPILLUP;
1639
1640         /*---------------------------------------------------------*/
1641         /* We use the frame register also for any method that has  */
1642         /* filter clauses. This way, when the handlers are called, */
1643         /* the code will reference local variables using the frame */
1644         /* reg instead of the stack pointer: if we had to restore  */
1645         /* the stack pointer, we'd corrupt the method frames that  */
1646         /* are already on the stack (since filters get called      */
1647         /* before stack unwinding happens) when the filter code    */
1648         /* would call any method.                                  */
1649         /*---------------------------------------------------------*/
1650         if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
1651                 frame_reg = s390_r11;
1652
1653         cfg->frame_reg = frame_reg;
1654
1655         if (frame_reg != STK_BASE)
1656                 cfg->used_int_regs |= 1 << frame_reg;
1657
1658         sig     = mono_method_signature (cfg->method);
1659
1660         cinfo   = get_call_info (cfg, cfg->mempool, sig, sig->pinvoke);
1661
1662         if (cinfo->struct_ret) {
1663                 cfg->vret_addr->opcode = OP_REGVAR;
1664                 cfg->vret_addr->inst_c0 = s390_r2;
1665         } else {
1666                 switch (mono_type_get_underlying_type (sig->ret)->type) {
1667                 case MONO_TYPE_VOID:
1668                         break;
1669                 default:
1670                         cfg->ret->opcode = OP_REGVAR;
1671                         cfg->ret->dreg   = s390_r2;
1672                         break;
1673                 }
1674         }
1675
1676         /*--------------------------------------------------------------*/
1677         /* local vars are at a positive offset from the stack pointer   */
1678         /* also note that if the function uses alloca, we use s390_r11  */
1679         /* to point at the local variables.                             */
1680         /* add parameter area size for called functions                 */
1681         /*--------------------------------------------------------------*/
1682         offset          = (cfg->param_area + S390_MINIMAL_STACK_SIZE);
1683         cfg->sig_cookie = 0;
1684
1685         if (cinfo->struct_ret) {
1686                 inst               = cfg->vret_addr;
1687                 offset             = S390_ALIGN(offset, sizeof(gpointer));
1688                 inst->inst_offset  = offset;
1689                 inst->opcode       = OP_REGOFFSET;
1690                 inst->inst_basereg = frame_reg;
1691                 offset            += sizeof(gpointer);
1692                 if ((sig->call_convention == MONO_CALL_VARARG) &&
1693                     (!retFitsInReg (cinfo->ret.size)))
1694                         cfg->sig_cookie += cinfo->ret.size;
1695                 if (G_UNLIKELY (cfg->verbose_level > 1)) {
1696                         printf ("vret_addr =");
1697                         mono_print_ins (cfg->vret_addr);
1698                 }
1699         }
1700
1701         if (sig->hasthis) {
1702                 inst = cfg->args [0];
1703                 if (inst->opcode != OP_REGVAR) {
1704                         inst->opcode       = OP_REGOFFSET;
1705                         inst->inst_basereg = frame_reg;
1706                         offset             = S390_ALIGN(offset, sizeof(gpointer));
1707                         inst->inst_offset  = offset;
1708                         offset            += sizeof (gpointer);
1709                 }
1710                 curinst = sArg = 1;
1711         } else {
1712                 curinst = sArg = 0;
1713         }
1714
1715         eArg = sig->param_count + sArg;
1716
1717         if (sig->call_convention == MONO_CALL_VARARG)
1718                 cfg->sig_cookie += S390_MINIMAL_STACK_SIZE;
1719
1720         for (iParm = sArg; iParm < eArg; ++iParm) {
1721                 inst = cfg->args [curinst];
1722                 if (inst->opcode != OP_REGVAR) {
1723                         switch (cinfo->args[iParm].regtype) {
1724                                 case RegTypeStructByAddr :
1725                                 if (cinfo->args[iParm].reg == STK_BASE) {
1726                                         inst->opcode       = OP_S390_LOADARG;
1727                                         inst->inst_basereg = frame_reg;
1728                                         size               = abs(cinfo->args[iParm].vtsize);
1729                                         offset             = S390_ALIGN(offset, sizeof(long));
1730                                         inst->inst_offset  = offset;
1731                                         inst->backend.arg_info       = cinfo->args[iParm].offset;
1732                                 } else {
1733                                         inst->opcode       = OP_S390_ARGREG;
1734                                         inst->inst_basereg = frame_reg;
1735                                         size               = sizeof(gpointer);
1736                                         offset             = S390_ALIGN(offset, size);
1737                                         inst->inst_offset  = offset;
1738                                         inst->backend.arg_info       = cinfo->args[iParm].offset;
1739                                 }
1740                                         break;
1741                                 case RegTypeStructByVal :
1742                                         inst->opcode       = OP_S390_ARGPTR;
1743                                         inst->inst_basereg = frame_reg;
1744                                         size               = cinfo->args[iParm].size;
1745                                         offset             = S390_ALIGN(offset, size);
1746                                         inst->inst_offset  = offset;
1747                                         inst->backend.arg_info       = cinfo->args[iParm].offset;
1748                                         break;
1749                                 default :
1750                                 if (cinfo->args[iParm].reg != STK_BASE) {
1751                                         inst->opcode       = OP_REGOFFSET;
1752                                         inst->inst_basereg = frame_reg;
1753                                         size               = (cinfo->args[iParm].size < 8
1754                                                               ? sizeof(long)
1755                                                               : sizeof(long long));
1756                                         offset             = S390_ALIGN(offset, size);
1757                                         inst->inst_offset  = offset;
1758                                 } else {
1759                                         inst->opcode       = OP_S390_STKARG;
1760                                         inst->inst_basereg = frame_reg;
1761                                         size               = (cinfo->args[iParm].size < 4
1762                                                               ? 4 - cinfo->args[iParm].size
1763                                                               : 0);
1764                                         inst->inst_offset  = cinfo->args[iParm].offset +
1765                                                              size;
1766                                         inst->backend.arg_info       = 0;
1767                                         size               = sizeof(long);
1768                                 }
1769                         }
1770                         if ((sig->call_convention == MONO_CALL_VARARG) &&
1771                             (cinfo->args[iParm].regtype != RegTypeGeneral) &&
1772                             (iParm < sig->sentinelpos))
1773                                 cfg->sig_cookie += size;
1774
1775                         offset += size;
1776                 }
1777                 curinst++;
1778         }
1779
1780         curinst = cfg->locals_start;
1781         for (iVar = curinst; iVar < cfg->num_varinfo; ++iVar) {
1782                 inst = cfg->varinfo [iVar];
1783                 if ((inst->flags & MONO_INST_IS_DEAD) ||
1784                     (inst->opcode == OP_REGVAR))
1785                         continue;
1786
1787                 /*--------------------------------------------------*/
1788                 /* inst->backend.is_pinvoke indicates native sized value types, */
1789                 /* this is used by the pinvoke wrappers when they   */
1790                 /* call functions returning structure               */
1791                 /*--------------------------------------------------*/
1792                 if (inst->backend.is_pinvoke && MONO_TYPE_ISSTRUCT (inst->inst_vtype))
1793                         size = mono_class_native_size (mono_class_from_mono_type(inst->inst_vtype), &align);
1794                 else
1795                         size = mono_type_size (inst->inst_vtype, &align);
1796
1797                 offset             = S390_ALIGN(offset, align);
1798                 inst->inst_offset  = offset;
1799                 inst->opcode       = OP_REGOFFSET;
1800                 inst->inst_basereg = frame_reg;
1801                 offset            += size;
1802                 DEBUG (g_print("allocating local %d to %ld\n", iVar, inst->inst_offset));
1803         }
1804
1805         /*------------------------------------------------------*/
1806         /* Allow space for the trace method stack area if needed*/
1807         /*------------------------------------------------------*/
1808         if (mono_jit_trace_calls != NULL && mono_trace_eval (cfg->method)) {
1809                 offset += S390_TRACE_STACK_SIZE;
1810         }
1811
1812         /*------------------------------------------------------*/
1813         /* Reserve space to save LMF and caller saved registers */
1814         /*------------------------------------------------------*/
1815         if (cfg->method->save_lmf)
1816                 offset += sizeof (MonoLMF);
1817
1818         /*------------------------------------------------------*/
1819         /* align the offset                                     */
1820         /*------------------------------------------------------*/
1821         cfg->stack_offset = S390_ALIGN(offset, S390_STACK_ALIGNMENT);
1822
1823 }
1824
1825 /*========================= End of Function ========================*/
1826
1827 /*------------------------------------------------------------------*/
1828 /*                                                                  */
1829 /* Name         - mono_arch_create_vars                                 */
1830 /*                                                                  */
1831 /*------------------------------------------------------------------*/
1832
1833 void
1834 mono_arch_create_vars (MonoCompile *cfg)
1835 {
1836         MonoMethodSignature *sig;
1837         CallInfo *cinfo;
1838
1839         sig = mono_method_signature (cfg->method);
1840
1841         cinfo = get_call_info (cfg, cfg->mempool, sig, sig->pinvoke);
1842
1843         if (cinfo->struct_ret) {
1844                 cfg->vret_addr = mono_compile_create_var (cfg, &mono_defaults.int_class->byval_arg, OP_ARG);
1845                 if (G_UNLIKELY (cfg->verbose_level > 1)) {
1846                         printf ("vret_addr = ");
1847                         mono_print_ins (cfg->vret_addr);
1848                 }
1849         }
1850 }
1851
1852 /*========================= End of Function ========================*/
1853
1854 /*------------------------------------------------------------------*/
1855 /*                                                                  */
1856 /* Name         - mono_arch_call_opcode                             */
1857 /*                                                                  */
1858 /* Function     - Take the arguments and generate the arch-specific */
1859 /*                instructions to properly call the function. This  */
1860 /*                includes pushing, moving argments to the correct  */
1861 /*                etc.                                              */
1862 /*                                                                  */
1863 /*------------------------------------------------------------------*/
1864
1865 MonoCallInst*
1866 mono_arch_call_opcode (MonoCompile *cfg, MonoBasicBlock* bb,
1867                        MonoCallInst *call, int is_virtual)
1868 {
1869         MonoInst *in;
1870         MonoCallArgParm *arg;
1871         MonoMethodSignature *sig;
1872         int i, n, lParamArea;
1873         CallInfo *cinfo;
1874         ArgInfo *ainfo = NULL;
1875         int stackSize;
1876
1877         sig = call->signature;
1878         n = sig->param_count + sig->hasthis;
1879         DEBUG (g_print ("Call requires: %d parameters\n",n));
1880
1881         cinfo = get_call_info (cfg, cfg->mempool, sig, sig->pinvoke);
1882
1883         stackSize         = cinfo->sz.stack_size + cinfo->sz.local_size + cinfo->sz.parm_size + cinfo->sz.offset;
1884         call->stack_usage = MAX(stackSize, call->stack_usage);
1885         lParamArea        = MAX((call->stack_usage-S390_MINIMAL_STACK_SIZE-cinfo->sz.parm_size), 0);
1886         cfg->param_area   = MAX(((signed) cfg->param_area), lParamArea);
1887         cfg->flags       |= MONO_CFG_HAS_CALLS;
1888
1889         if (cinfo->struct_ret)
1890                 call->used_iregs |= 1 << cinfo->ret.reg;
1891
1892         for (i = 0; i < n; ++i) {
1893                 ainfo = cinfo->args + i;
1894
1895                 if ((sig->call_convention == MONO_CALL_VARARG) &&
1896                     (i == sig->sentinelpos)) {
1897                         emit_sig_cookie (cfg, call, cinfo, ainfo->size);
1898                 }
1899
1900                 if (is_virtual && i == 0) {
1901                         /* the argument will be attached to the call instrucion */
1902                         in = call->args [i];
1903                         call->used_iregs |= 1 << ainfo->reg;
1904                 } else {
1905                         MONO_INST_NEW_CALL_ARG (cfg, arg, OP_OUTARG);
1906                         in                  = call->args [i];
1907                         arg->ins.cil_code   = in->cil_code;
1908                         arg->ins.inst_left  = in;
1909                         arg->ins.type       = in->type;
1910                         MONO_INST_LIST_ADD_TAIL (&arg->ins.node, &call->out_args);
1911                         arg->ins.inst_right = (MonoInst *) call;
1912                         if (ainfo->regtype == RegTypeGeneral) {
1913                                 arg->ins.backend.reg3   = ainfo->reg;
1914                                 call->used_iregs |= 1 << ainfo->reg;
1915                                 if (arg->ins.type == STACK_I8)
1916                                         call->used_iregs |= 1 << (ainfo->reg + 1);
1917                         } else if (ainfo->regtype == RegTypeStructByAddr) {
1918                                 call->used_iregs |= 1 << ainfo->reg;
1919                                 arg->ins.sreg1    = ainfo->reg;
1920                                 arg->ins.opcode   = OP_OUTARG_VT;
1921                                 arg->size         = -ainfo->vtsize;
1922                                 arg->offset       = ainfo->offset;
1923                                 arg->offPrm       = ainfo->offparm + cinfo->sz.offStruct;
1924                         } else if (ainfo->regtype == RegTypeStructByVal) {
1925                                 if (ainfo->reg != STK_BASE) {
1926                                         switch (ainfo->size) {
1927                                         case 0:
1928                                         case 1:
1929                                         case 2:
1930                                         case 4:
1931                                                 call->used_iregs |= 1 << ainfo->reg;
1932                                                 break;
1933                                         case 8:
1934                                                 call->used_iregs |= 1 << ainfo->reg;
1935                                                 call->used_iregs |= 1 << (ainfo->reg+1);
1936                                                 break;
1937                                         default:
1938                                                 call->used_iregs |= 1 << ainfo->reg;
1939                                         }
1940                                 }
1941                                 arg->ins.sreg1  = ainfo->reg;
1942                                 arg->ins.opcode = OP_OUTARG_VT;
1943                                 arg->size       = ainfo->size;
1944                                 arg->offset     = ainfo->offset;
1945                                 arg->offPrm     = ainfo->offparm + cinfo->sz.offStruct;
1946                         } else if (ainfo->regtype == RegTypeBase) {
1947                                 arg->ins.opcode   = OP_OUTARG_MEMBASE;
1948                                 arg->ins.sreg1    = ainfo->reg;
1949                                 arg->size         = ainfo->size;
1950                                 arg->offset       = ainfo->offset;
1951                                 call->used_iregs |= 1 << ainfo->reg;
1952                         } else if (ainfo->regtype == RegTypeFP) {
1953                                 arg->ins.backend.reg3   = ainfo->reg;
1954                                 call->used_fregs |= 1 << ainfo->reg;
1955                                 if (ainfo->size == 4)
1956                                         arg->ins.opcode = OP_OUTARG_R4;
1957                                 else
1958                                         arg->ins.opcode = OP_OUTARG_R8;
1959                         } else {
1960                                 g_assert_not_reached ();
1961                         }
1962                 }
1963         }
1964
1965         /*
1966          * Handle the case where there are no implicit arguments
1967          */
1968         if ((sig->call_convention == MONO_CALL_VARARG) &&
1969             (i == sig->sentinelpos)) {
1970                 emit_sig_cookie (cfg, call, cinfo, ainfo->size);
1971         }
1972
1973         return call;
1974 }
1975
1976 /*========================= End of Function ========================*/
1977
1978 /*------------------------------------------------------------------*/
1979 /*                                                                  */
1980 /* Name         - emit_sig_cookie.                                  */
1981 /*                                                                  */
1982 /* Function     - For variable length parameter lists construct a   */
1983 /*                signature cookie and emit it.                     */
1984 /*                                                                  */
1985 /*------------------------------------------------------------------*/
1986
1987 static void
1988 emit_sig_cookie (MonoCompile *cfg, MonoCallInst *call,
1989                  CallInfo *cinfo, int argSize)
1990 {
1991         MonoCallArgParm *arg;
1992         MonoMethodSignature *tmpSig;
1993         MonoInst *sigArg;
1994
1995         cfg->disable_aot = TRUE;
1996
1997         /*----------------------------------------------------------*/
1998         /* mono_ArgIterator_Setup assumes the signature cookie is   */
1999         /* passed first and all the arguments which were before it  */
2000         /* passed on the stack after the signature. So compensate   */
2001         /* by passing a different signature.                        */
2002         /*----------------------------------------------------------*/
2003         tmpSig = mono_metadata_signature_dup (call->signature);
2004         tmpSig->param_count -= call->signature->sentinelpos;
2005         tmpSig->sentinelpos  = 0;
2006         if (tmpSig->param_count > 0)
2007                 memcpy (tmpSig->params,
2008                         call->signature->params + call->signature->sentinelpos,
2009                         tmpSig->param_count * sizeof(MonoType *));
2010
2011         MONO_INST_NEW (cfg, sigArg, OP_ICONST);
2012         sigArg->inst_p0 = tmpSig;
2013
2014         MONO_INST_NEW_CALL_ARG (cfg, arg, OP_OUTARG_MEMBASE);
2015         arg->ins.inst_left   = sigArg;
2016         arg->ins.inst_right  = (MonoInst *) call;
2017         arg->size            = argSize;
2018         arg->offset          = cinfo->sigCookie.offset;
2019         MONO_INST_LIST_ADD_TAIL (&arg->ins.node, &call->out_args);
2020 }
2021
2022 /*========================= End of Function ========================*/
2023
2024 /*------------------------------------------------------------------*/
2025 /*                                                                  */
2026 /* Name         - mono_arch_instrument_mem_needs                    */
2027 /*                                                                  */
2028 /* Function     - Allow tracing to work with this interface (with   */
2029 /*                an optional argument).                            */
2030 /*                                                                  */
2031 /*------------------------------------------------------------------*/
2032
2033 void
2034 mono_arch_instrument_mem_needs (MonoMethod *method, int *stack, int *code)
2035 {
2036         /* no stack room needed now (may be needed for FASTCALL-trace support) */
2037         *stack = 0;
2038         /* split prolog-epilog requirements? */
2039         *code = 50; /* max bytes needed: check this number */
2040 }
2041
2042 /*========================= End of Function ========================*/
2043
2044 /*------------------------------------------------------------------*/
2045 /*                                                                  */
2046 /* Name         - mono_arch_instrument_prolog                       */
2047 /*                                                                  */
2048 /* Function     - Create an "instrumented" prolog.                  */
2049 /*                                                                  */
2050 /*------------------------------------------------------------------*/
2051
2052 void*
2053 mono_arch_instrument_prolog (MonoCompile *cfg, void *func, void *p,
2054                              gboolean enable_arguments)
2055 {
2056         guchar  *code = p;
2057         int     parmOffset,
2058                 fpOffset,
2059                 baseReg;
2060
2061         parmOffset = cfg->stack_usage - S390_TRACE_STACK_SIZE;
2062         if (cfg->method->save_lmf)
2063                 parmOffset -= sizeof(MonoLMF);
2064         fpOffset   = parmOffset + (5*sizeof(gint32));
2065         if (fpOffset > 4096) {
2066                 s390_lr (code, s390_r12, STK_BASE);
2067                 baseReg = s390_r12;
2068                 while (fpOffset > 4096) {
2069                         s390_ahi (code, baseReg, 4096);
2070                         fpOffset   -= 4096;
2071                         parmOffset -= 4096;
2072                 }
2073         } else {
2074                 baseReg = STK_BASE;
2075         }
2076
2077         s390_stm  (code, s390_r2, s390_r6, baseReg, parmOffset);
2078         s390_std  (code, s390_f0, 0, baseReg, fpOffset);
2079         s390_std  (code, s390_f1, 0, baseReg, fpOffset+sizeof(gdouble));
2080         s390_std  (code, s390_f2, 0, baseReg, fpOffset+2*sizeof(gdouble));
2081         s390_basr (code, s390_r13, 0);
2082         s390_j    (code, 6);
2083         s390_word (code, cfg->method);
2084         s390_word (code, func);
2085         s390_l    (code, s390_r2, 0, s390_r13, 4);
2086         s390_la   (code, s390_r3, 0, baseReg, parmOffset);
2087         s390_lr   (code, s390_r4, STK_BASE);
2088         s390_ahi  (code, s390_r4, cfg->stack_usage);
2089         s390_l    (code, s390_r1, 0, s390_r13, 8);
2090         s390_basr (code, s390_r14, s390_r1);
2091         s390_ld   (code, s390_f2, 0, baseReg, fpOffset+2*sizeof(gdouble));
2092         s390_ld   (code, s390_f1, 0, baseReg, fpOffset+sizeof(gdouble));
2093         s390_ld   (code, s390_f0, 0, baseReg, fpOffset);
2094         s390_lm   (code, s390_r2, s390_r6, baseReg, parmOffset);
2095
2096         return code;
2097 }
2098
2099 /*========================= End of Function ========================*/
2100
2101 /*------------------------------------------------------------------*/
2102 /*                                                                  */
2103 /* Name         - mono_arch_instrument_epilog                       */
2104 /*                                                                  */
2105 /* Function     - Create an epilog that will handle the returned    */
2106 /*                values used in instrumentation.                   */
2107 /*                                                                  */
2108 /*------------------------------------------------------------------*/
2109
2110 void*
2111 mono_arch_instrument_epilog (MonoCompile *cfg, void *func, void *p, gboolean enable_arguments)
2112 {
2113         guchar     *code = p;
2114         int        save_mode = SAVE_NONE,
2115                    saveOffset;
2116         MonoMethod *method = cfg->method;
2117         int        rtype = mono_type_get_underlying_type (mono_method_signature (method)->ret)->type;
2118
2119         saveOffset = cfg->stack_usage - S390_TRACE_STACK_SIZE;
2120         if (method->save_lmf)
2121                 saveOffset -= sizeof(MonoLMF);
2122
2123 handle_enum:
2124         switch (rtype) {
2125         case MONO_TYPE_VOID:
2126                 /* special case string .ctor icall */
2127                 if (strcmp (".ctor", method->name) && method->klass == mono_defaults.string_class)
2128                         save_mode = SAVE_ONE;
2129                 else
2130                         save_mode = SAVE_NONE;
2131                 break;
2132         case MONO_TYPE_I8:
2133         case MONO_TYPE_U8:
2134                 save_mode = SAVE_TWO;
2135                 break;
2136         case MONO_TYPE_R4:
2137                 save_mode = SAVE_R4;
2138                 break;
2139         case MONO_TYPE_R8:
2140                 save_mode = SAVE_R8;
2141                 break;
2142         case MONO_TYPE_VALUETYPE:
2143                 if (mono_method_signature (method)->ret->data.klass->enumtype) {
2144                         rtype = mono_method_signature (method)->ret->data.klass->enum_basetype->type;
2145                         goto handle_enum;
2146                 }
2147                 save_mode = SAVE_STRUCT;
2148                 break;
2149         default:
2150                 save_mode = SAVE_ONE;
2151                 break;
2152         }
2153
2154         switch (save_mode) {
2155         case SAVE_TWO:
2156                 s390_stm (code, s390_r2, s390_r3, cfg->frame_reg, saveOffset);
2157                 if (enable_arguments) {
2158                         s390_lr (code, s390_r4, s390_r3);
2159                         s390_lr (code, s390_r3, s390_r2);
2160                 }
2161                 break;
2162         case SAVE_ONE:
2163                 s390_st (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2164                 if (enable_arguments) {
2165                         s390_lr (code, s390_r3, s390_r2);
2166                 }
2167                 break;
2168         case SAVE_R4:
2169                 s390_std (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2170                 if (enable_arguments) {
2171                         s390_ldebr (code, s390_f0, s390_f0);
2172                 }
2173                 break;
2174         case SAVE_R8:
2175                 s390_std (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2176                 break;
2177         case SAVE_STRUCT:
2178                 s390_st (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2179                 if (enable_arguments) {
2180                         s390_l (code, s390_r3, 0, cfg->frame_reg,
2181                                 S390_MINIMAL_STACK_SIZE+cfg->param_area);
2182                 }
2183                 break;
2184         case SAVE_NONE:
2185         default:
2186                 break;
2187         }
2188
2189         s390_basr (code, s390_r13, 0);
2190         s390_j    (code, 6);
2191         s390_word (code, cfg->method);
2192         s390_word (code, func);
2193         s390_l    (code, s390_r2, 0, s390_r13, 4);
2194         s390_l    (code, s390_r1, 0, s390_r13, 8);
2195         s390_basr (code, s390_r14, s390_r1);
2196
2197         switch (save_mode) {
2198         case SAVE_TWO:
2199                 s390_lm  (code, s390_r2, s390_r3, cfg->frame_reg, saveOffset);
2200                 break;
2201         case SAVE_ONE:
2202                 s390_l   (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2203                 break;
2204         case SAVE_R4:
2205         case SAVE_R8:
2206                 s390_ld  (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2207                 break;
2208         case SAVE_STRUCT:
2209                 s390_l   (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2210                 break;
2211         case SAVE_NONE:
2212         default:
2213                 break;
2214         }
2215
2216         return code;
2217 }
2218
2219 /*========================= End of Function ========================*/
2220
2221 void
2222 mono_arch_peephole_pass_1 (MonoCompile *cfg, MonoBasicBlock *bb)
2223 {
2224 }
2225
2226 /*------------------------------------------------------------------*/
2227 /*                                                                  */
2228 /* Name         - mono_arch_peephole_pass                                     */
2229 /*                                                                  */
2230 /* Function     - Form a peephole pass at the code looking for      */
2231 /*                simple optimizations.                             */
2232 /*                                                                  */
2233 /*------------------------------------------------------------------*/
2234
2235 void
2236 mono_arch_peephole_pass_2 (MonoCompile *cfg, MonoBasicBlock *bb)
2237 {
2238         MonoInst *ins, *n;
2239
2240         MONO_BB_FOR_EACH_INS_SAFE (bb, n, ins) {
2241                 mono_peephole_ins (bb, ins);
2242         }
2243 }
2244
2245 /*========================= End of Function ========================*/
2246
2247 void
2248 mono_arch_lowering_pass (MonoCompile *cfg, MonoBasicBlock *bb)
2249 {
2250         MonoInst *ins, *next;
2251
2252         if (bb->max_vreg > cfg->rs->next_vreg)
2253                 cfg->rs->next_vreg = bb->max_vreg;
2254
2255         MONO_BB_FOR_EACH_INS_SAFE (bb, next, ins) {
2256                 switch (ins->opcode) {
2257                 case OP_DIV_IMM:
2258                 case OP_REM_IMM:
2259                 case OP_IDIV_IMM:
2260                 case OP_IREM_IMM:
2261                 case OP_IDIV_UN_IMM:
2262                 case OP_IREM_UN_IMM:
2263                         mono_decompose_op_imm (cfg, ins);
2264                         break;
2265                 default:
2266                         break;
2267                 }
2268         }
2269
2270         bb->max_vreg = cfg->rs->next_vreg;
2271 }
2272
2273 /*========================= End of Function ========================*/
2274
2275 /*------------------------------------------------------------------*/
2276 /*                                                                  */
2277 /* Name         - emit_float_to_int                                 */
2278 /*                                                                  */
2279 /* Function     - Create instructions which will convert a floating */
2280 /*                point value to integer.                           */
2281 /*                                                                  */
2282 /*------------------------------------------------------------------*/
2283
2284 static guchar*
2285 emit_float_to_int (MonoCompile *cfg, guchar *code, int dreg, int sreg, int size, gboolean is_signed)
2286 {
2287         /* sreg is a float, dreg is an integer reg. */
2288         if (is_signed) {
2289                 s390_cfdbr (code, dreg, 5, sreg);
2290                 switch (size) {
2291                         case 1:
2292                                 s390_lhi  (code, s390_r0, 0);
2293                                 s390_lhi  (code, s390_r13, 0xff);
2294                                 s390_ltr  (code, dreg, dreg);
2295                                 s390_jnl  (code, 4);
2296                                 s390_lhi  (code, s390_r0, 0x80);
2297                                 s390_nr   (code, dreg, s390_r13);
2298                                 s390_or   (code, dreg, s390_r0);
2299                                 break;
2300                 }
2301         } else {
2302                 short *o[1];
2303                 s390_basr   (code, s390_r13, 0);
2304                 s390_j      (code, 10);
2305                 s390_llong  (code, 0x41e0000000000000LL);
2306                 s390_llong  (code, 0x41f0000000000000LL);
2307                 s390_ldr    (code, s390_f15, sreg);
2308                 s390_cdb    (code, s390_f15, 0, s390_r13, 4);
2309                 s390_jl     (code, 0); CODEPTR(code, o[0]);
2310                 s390_sdb    (code, s390_f15, 0, s390_r13, 12);
2311                 s390_cfdbr  (code, dreg, 7, s390_f15);
2312                 s390_j      (code, 4);
2313                 PTRSLOT(code, o[0]);
2314                 s390_cfdbr  (code, dreg, 5, sreg);
2315                 switch (size) {
2316                         case 1:
2317                                 s390_lhi  (code, s390_r0, 0xff);
2318                                 s390_nr   (code, dreg, s390_r0);
2319                                 break;
2320                         case 2:
2321                                 s390_lhi  (code, s390_r0, -1);
2322                                 s390_srl  (code, s390_r0, 0, 16);
2323                                 s390_nr   (code, dreg, s390_r0);
2324                                 break;
2325                 }
2326         }
2327         return code;
2328 }
2329
2330 /*========================= End of Function ========================*/
2331
2332 /*------------------------------------------------------------------*/
2333 /*                                                                  */
2334 /* Name         - mono_arch_output_basic_block                      */
2335 /*                                                                  */
2336 /* Function     - Perform the "real" work of emitting instructions  */
2337 /*                that will do the work of in the basic block.      */
2338 /*                                                                  */
2339 /*------------------------------------------------------------------*/
2340
2341 void
2342 mono_arch_output_basic_block (MonoCompile *cfg, MonoBasicBlock *bb)
2343 {
2344         MonoInst *ins, *next;
2345         MonoCallInst *call;
2346         guint offset;
2347         guint8 *code = cfg->native_code + cfg->code_len;
2348         guint last_offset = 0;
2349         int max_len, cpos, src2;
2350
2351         /* we don't align basic blocks of loops on s390 */
2352
2353         if (cfg->verbose_level > 2)
2354                 g_print ("Basic block %d starting at offset 0x%x\n", bb->block_num, bb->native_offset);
2355
2356         cpos = bb->max_offset;
2357
2358         if (cfg->prof_options & MONO_PROFILE_COVERAGE) {
2359                 //MonoCoverageInfo *cov = mono_get_coverage_info (cfg->method);
2360                 //g_assert (!mono_compile_aot);
2361                 //cpos += 6;
2362                 //if (bb->cil_code)
2363                 //      cov->data [bb->dfn].iloffset = bb->cil_code - cfg->cil_code;
2364                 /* this is not thread save, but good enough */
2365                 /* fixme: howto handle overflows? */
2366                 //x86_inc_mem (code, &cov->data [bb->dfn].count);
2367         }
2368
2369         MONO_BB_FOR_EACH_INS (bb, ins) {
2370                 offset = code - cfg->native_code;
2371
2372                 max_len = ((guint8 *)ins_get_spec (ins->opcode))[MONO_INST_LEN];
2373
2374                 if (offset > (cfg->code_size - max_len - 16)) {
2375                         cfg->code_size *= 2;
2376                         cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
2377                         code = cfg->native_code + offset;
2378                 }
2379
2380                 mono_debug_record_line_number (cfg, ins, offset);
2381
2382                 switch (ins->opcode) {
2383                 case OP_STOREI1_MEMBASE_IMM: {
2384                         s390_lhi (code, s390_r0, ins->inst_imm);
2385                         if (s390_is_uimm12(ins->inst_offset))
2386                                 s390_stc (code, s390_r0, 0, ins->inst_destbasereg, ins->inst_offset);
2387                         else {
2388                                 s390_basr (code, s390_r13, 0);
2389                                 s390_j    (code, 4);
2390                                 s390_word (code, ins->inst_offset);
2391                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2392                                 s390_stc  (code, s390_r0, s390_r13, ins->inst_destbasereg, 0);
2393                         }
2394                 }
2395                         break;
2396                 case OP_STOREI2_MEMBASE_IMM: {
2397                         s390_lhi (code, s390_r0, ins->inst_imm);
2398                         if (s390_is_uimm12(ins->inst_offset)) {
2399                                 s390_sth (code, s390_r0, 0, ins->inst_destbasereg, ins->inst_offset);
2400                         } else {
2401                                 s390_basr (code, s390_r13, 0);
2402                                 s390_j    (code, 4);
2403                                 s390_word (code, ins->inst_offset);
2404                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2405                                 s390_sth  (code, s390_r0, s390_r13, ins->inst_destbasereg, 0);
2406                         }
2407                 }
2408                         break;
2409                 case OP_STORE_MEMBASE_IMM:
2410                 case OP_STOREI4_MEMBASE_IMM: {
2411                         if (s390_is_imm16(ins->inst_imm)) {
2412                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2413                         } else {
2414                                 s390_basr (code, s390_r13, 0);
2415                                 s390_j    (code, 4);
2416                                 s390_word (code, ins->inst_imm);
2417                                 s390_l    (code, s390_r0, 0, s390_r13, 4);
2418                         }
2419                         if (s390_is_uimm12(ins->inst_offset)) {
2420                                 s390_st  (code, s390_r0, 0, ins->inst_destbasereg, ins->inst_offset);
2421                         } else {
2422                                 s390_basr (code, s390_r13, 0);
2423                                 s390_j    (code, 4);
2424                                 s390_word (code, ins->inst_offset);
2425                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2426                                 s390_st   (code, s390_r0, s390_r13, ins->inst_destbasereg, 0);
2427                         }
2428                 }
2429                         break;
2430                 case OP_STOREI1_MEMBASE_REG: {
2431                         if (s390_is_uimm12(ins->inst_offset)) {
2432                                 s390_stc  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
2433                         } else {
2434                                 s390_basr (code, s390_r13, 0);
2435                                 s390_j    (code, 4);
2436                                 s390_word (code, ins->inst_offset);
2437                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2438                                 s390_stc  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
2439                         }
2440                 }
2441                         break;
2442                 case OP_STOREI2_MEMBASE_REG: {
2443                         if (s390_is_uimm12(ins->inst_offset)) {
2444                                 s390_sth  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
2445                         } else {
2446                                 s390_basr (code, s390_r13, 0);
2447                                 s390_j    (code, 4);
2448                                 s390_word (code, ins->inst_offset);
2449                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2450                                 s390_sth  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
2451                         }
2452                 }
2453                         break;
2454                 case OP_STORE_MEMBASE_REG:
2455                 case OP_STOREI4_MEMBASE_REG: {
2456                         if (s390_is_uimm12(ins->inst_offset)) {
2457                                 s390_st   (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_st   (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
2464                         }
2465                 }
2466                         break;
2467                 case OP_LOADU4_MEM:
2468                         g_assert_not_reached ();
2469                         break;
2470                 case OP_LOAD_MEMBASE:
2471                 case OP_LOADI4_MEMBASE:
2472                 case OP_LOADU4_MEMBASE: {
2473                         if (s390_is_uimm12(ins->inst_offset))
2474                                 s390_l    (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
2475                         else {
2476                                 if (s390_is_imm16(ins->inst_offset)) {
2477                                         s390_lhi (code, s390_r13, ins->inst_offset);
2478                                         s390_l   (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
2479                                 } else {
2480                                         s390_basr (code, s390_r13, 0);
2481                                         s390_j    (code, 4);
2482                                         s390_word (code, ins->inst_offset);
2483                                         s390_l    (code, s390_r13, 0, s390_r13, 4);
2484                                         s390_l    (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
2485                                 }
2486                         }
2487                 }
2488                         break;
2489                 case OP_LOADU1_MEMBASE: {
2490                         s390_lhi (code, s390_r0, 0);
2491                         if (s390_is_uimm12(ins->inst_offset))
2492                                 s390_ic   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
2493                         else {
2494                                 s390_basr (code, s390_r13, 0);
2495                                 s390_j    (code, 4);
2496                                 s390_word (code, ins->inst_offset);
2497                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2498                                 s390_ic   (code, s390_r0, s390_r13, ins->inst_basereg, 0);
2499                         }
2500                         s390_lr   (code, ins->dreg, s390_r0);
2501                 }
2502                         break;
2503                 case OP_LOADI1_MEMBASE: {
2504                         s390_lhi (code, s390_r0, 0);
2505                         if (s390_is_uimm12(ins->inst_offset))
2506                                 s390_ic   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
2507                         else {
2508                                 s390_basr (code, s390_r13, 0);
2509                                 s390_j    (code, 4);
2510                                 s390_word (code, ins->inst_offset);
2511                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2512                                 s390_ic   (code, s390_r0, s390_r13, ins->inst_basereg, 0);
2513                         }
2514                         s390_lhi  (code, s390_r13, 0x80);
2515                         s390_nr   (code, s390_r13, s390_r0);
2516                         s390_jz   (code, 5);
2517                         s390_lhi  (code, s390_r13, 0xff00);
2518                         s390_or   (code, s390_r0, s390_r13);
2519                         s390_lr   (code, ins->dreg, s390_r0);
2520                 }
2521                         break;
2522                 case OP_LOADU2_MEMBASE: {
2523                         s390_lhi (code, s390_r0, 0);
2524                         if (s390_is_uimm12(ins->inst_offset))
2525                                 s390_icm  (code, s390_r0, 3, ins->inst_basereg, ins->inst_offset);
2526                         else {
2527                                 s390_basr (code, s390_r13, 0);
2528                                 s390_j    (code, 4);
2529                                 s390_word (code, ins->inst_offset);
2530                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2531                                 s390_ar   (code, s390_r13, ins->inst_basereg);
2532                                 s390_icm  (code, s390_r0, 3, s390_r13, 0);
2533                         }
2534                         s390_lr  (code, ins->dreg, s390_r0);
2535                 }
2536                         break;
2537                 case OP_LOADI2_MEMBASE: {
2538                         s390_lhi (code, s390_r0, 0);
2539                         if (s390_is_uimm12(ins->inst_offset))
2540                                 s390_lh   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
2541                         else {
2542                                 s390_basr (code, s390_r13, 0);
2543                                 s390_j    (code, 4);
2544                                 s390_word (code, ins->inst_offset);
2545                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2546                                 s390_lh   (code, s390_r0, s390_r13, ins->inst_basereg, 0);
2547                         }
2548                         s390_lr  (code, ins->dreg, s390_r0);
2549                 }
2550                         break;
2551                 case OP_ICONV_TO_I1: {
2552                         s390_lhi  (code, s390_r0, 0x80);
2553                         if (ins->dreg != ins->sreg1) {
2554                                 s390_lr   (code, ins->dreg, ins->sreg1);
2555                         }
2556                         s390_nr   (code, s390_r0, ins->sreg1);
2557                         s390_jz   (code, 7);
2558                         s390_lhi  (code, s390_r13, -1);
2559                         s390_sll  (code, s390_r13, 0, 8);
2560                         s390_or   (code, ins->dreg, s390_r13);
2561                 }
2562                         break;
2563                 case OP_ICONV_TO_I2: {
2564                         s390_lhi  (code, s390_r0, 0x80);
2565                         s390_sll  (code, s390_r0, 0, 8);
2566                         if (ins->dreg != ins->sreg1) {
2567                                 s390_lr   (code, ins->dreg, ins->sreg1);
2568                         }
2569                         s390_nr   (code, s390_r0, ins->sreg1);
2570                         s390_jz   (code, 7);
2571                         s390_lhi  (code, s390_r13, -1);
2572                         s390_sll  (code, s390_r13, 0, 16);
2573                         s390_or   (code, ins->dreg, s390_r13);
2574                 }
2575                         break;
2576                 case OP_ICONV_TO_U1: {
2577                         s390_lhi  (code, s390_r0, 0xff);
2578                         if (ins->dreg != ins->sreg1) {
2579                                 s390_lr   (code, ins->dreg, ins->sreg1);
2580                         }
2581                         s390_nr   (code, ins->dreg, s390_r0);
2582                 }
2583                         break;
2584                 case OP_ICONV_TO_U2: {
2585                         s390_lhi  (code, s390_r0, -1);
2586                         s390_sll  (code, s390_r0, 0, 16);
2587                         s390_srl  (code, s390_r0, 0, 16);
2588                         if (ins->dreg != ins->sreg1) {
2589                                 s390_lr   (code, ins->dreg, ins->sreg1);
2590                         }
2591                         s390_nr   (code, ins->dreg, s390_r0);
2592                 }
2593                         break;
2594                 case OP_COMPARE: {
2595                         next = mono_inst_list_next (&ins->node, &bb->ins_list);
2596                         if ((next) &&
2597                             (((next->opcode >= OP_IBNE_UN) &&
2598                               (next->opcode <= OP_IBLT_UN)) ||
2599                              ((next->opcode >= OP_COND_EXC_NE_UN) &&
2600                               (next->opcode <= OP_COND_EXC_LT_UN)) ||
2601                              ((next->opcode == OP_CLT_UN) ||
2602                               (next->opcode == OP_CGT_UN))))
2603                                 s390_clr  (code, ins->sreg1, ins->sreg2);
2604                         else
2605                                 s390_cr   (code, ins->sreg1, ins->sreg2);
2606                 }
2607                         break;
2608                 case OP_COMPARE_IMM: {
2609                         next = mono_inst_list_next (&ins->node, &bb->ins_list);
2610                         if (s390_is_imm16 (ins->inst_imm)) {
2611                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2612                                 if ((next) &&
2613                                     (((next->opcode >= OP_IBNE_UN) &&
2614                                       (next->opcode <= OP_IBLT_UN)) ||
2615                                      ((next->opcode >= OP_COND_EXC_NE_UN) &&
2616                                       (next->opcode <= OP_COND_EXC_LT_UN)) ||
2617                                      ((next->opcode == OP_CLT_UN) ||
2618                                       (next->opcode == OP_CGT_UN))))
2619                                         s390_clr  (code, ins->sreg1, s390_r0);
2620                                 else
2621                                         s390_cr   (code, ins->sreg1, s390_r0);
2622                         }
2623                         else {
2624                                 s390_basr (code, s390_r13, 0);
2625                                 s390_j    (code, 4);
2626                                 s390_word (code, ins->inst_imm);
2627                                 if ((next) &&
2628                                     (((next->opcode >= OP_IBNE_UN) &&
2629                                       (next->opcode <= OP_IBLT_UN)) ||
2630                                      ((next->opcode >= OP_COND_EXC_NE_UN) &&
2631                                       (next->opcode <= OP_COND_EXC_LT_UN)) ||
2632                                      ((next->opcode == OP_CLT_UN) ||
2633                                       (next->opcode == OP_CGT_UN))))
2634                                         s390_cl   (code, ins->sreg1, 0, s390_r13, 4);
2635                                 else
2636                                         s390_c    (code, ins->sreg1, 0, s390_r13, 4);
2637                         }
2638                 }
2639                         break;
2640                 case OP_BREAK: {
2641                         mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS, mono_break);
2642                         s390_brasl (code, s390_r14, 0);
2643                 }
2644                         break;
2645                 case OP_ADDCC: {
2646                         CHECK_SRCDST_COM;
2647                         s390_alr  (code, ins->dreg, src2);
2648                 }
2649                         break;
2650                 case OP_IADD: {
2651                         CHECK_SRCDST_COM;
2652                         s390_ar   (code, ins->dreg, src2);
2653                 }
2654                         break;
2655                 case OP_ADC: {
2656                         CHECK_SRCDST_COM;
2657                         s390_alcr (code, ins->dreg, src2);
2658                 }
2659                         break;
2660                 case OP_ADD_IMM: {
2661                         if (ins->dreg != ins->sreg1) {
2662                                 s390_lr   (code, ins->dreg, ins->sreg1);
2663                         }
2664                         next = mono_inst_list_next (&ins->node, &bb->ins_list);
2665                         if ((next) &&
2666                             (next->opcode == OP_ADC_IMM)) {
2667                                 s390_basr (code, s390_r13, 0);
2668                                 s390_j    (code, 4);
2669                                 s390_word (code, ins->inst_imm);
2670                                 s390_a (code, ins->dreg, 0, s390_r13, 4);
2671                         } else {
2672                                 if (s390_is_imm16 (ins->inst_imm)) {
2673                                         s390_ahi  (code, ins->dreg, ins->inst_imm);
2674                                 } else {
2675                                         s390_basr (code, s390_r13, 0);
2676                                         s390_j    (code, 4);
2677                                         s390_word (code, ins->inst_imm);
2678                                         s390_a (code, ins->dreg, 0, s390_r13, 4);
2679                                 }
2680                         }
2681                 }
2682                         break;
2683                 case OP_ADDCC_IMM: {
2684                         next = mono_inst_list_next (&ins->node, &bb->ins_list);
2685                         if ((next) &&
2686                             (next->opcode == OP_ADC_IMM)) {
2687                                 s390_basr (code, s390_r13, 0);
2688                                 s390_j    (code, 4);
2689                                 s390_word (code, ins->inst_imm);
2690                                 if (ins->dreg != ins->sreg1) {
2691                                         s390_lr   (code, ins->dreg, ins->sreg1);
2692                                 }
2693                                 s390_al   (code, ins->dreg, 0, s390_r13, 4);
2694                         } else {
2695                                 if (s390_is_imm16 (ins->inst_imm)) {
2696                                         if (ins->dreg != ins->sreg1) {
2697                                                 s390_lr   (code, ins->dreg, ins->sreg1);
2698                                         }
2699                                         s390_lhi  (code, s390_r0, ins->inst_imm);
2700                                         s390_alcr (code, ins->dreg, s390_r0);
2701                                 } else {
2702                                         s390_basr (code, s390_r13, 0);
2703                                         s390_j    (code, 4);
2704                                         s390_word (code, ins->inst_imm);
2705                                         if (ins->dreg != ins->sreg1) {
2706                                                 s390_lr   (code, ins->dreg, ins->sreg1);
2707                                         }
2708                                         s390_al   (code, ins->dreg, 0, s390_r13, 4);
2709                                 }
2710                         }
2711                 }
2712                         break;
2713                 case OP_ADC_IMM: {
2714                         if (s390_is_imm16 (ins->inst_imm)) {
2715                                 if (ins->dreg != ins->sreg1) {
2716                                         s390_lr   (code, ins->dreg, ins->sreg1);
2717                                 }
2718                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2719                                 s390_alcr (code, ins->dreg, s390_r0);
2720                         } else {
2721                                 s390_basr (code, s390_r13, 0);
2722                                 s390_j    (code, 4);
2723                                 s390_word (code, ins->inst_imm);
2724                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2725                                 s390_alcr (code, ins->dreg, s390_r13);
2726                         }
2727                 }
2728                         break;
2729                 case OP_IADD_OVF: {
2730                         CHECK_SRCDST_COM;
2731                         s390_ar   (code, ins->dreg, src2);
2732                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2733                 }
2734                         break;
2735                 case OP_IADD_OVF_UN: {
2736                         CHECK_SRCDST_COM;
2737                         s390_alr  (code, ins->dreg, src2);
2738                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
2739                 }
2740                         break;
2741                 case OP_LADD: {
2742                         s390_alr  (code, s390_r0, ins->sreg1);
2743                         s390_jnc  (code, 4);
2744                         s390_ahi  (code, s390_r1, 1);
2745                         s390_ar   (code, s390_r1, ins->sreg2);
2746                         s390_lr   (code, ins->dreg, s390_r0);
2747                         s390_lr   (code, ins->dreg+1, s390_r1);
2748                 }
2749                         break;
2750                 case OP_LADD_OVF: {
2751                         short int *o[1];
2752                         s390_alr  (code, s390_r0, ins->sreg1);
2753                         s390_jnc  (code, 0); CODEPTR(code, o[0]);
2754                         s390_ahi  (code, s390_r1, 1);
2755                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2756                         PTRSLOT   (code, o[0]);
2757                         s390_ar   (code, s390_r1, ins->sreg2);
2758                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2759                         s390_lr   (code, ins->dreg, s390_r0);
2760                         s390_lr   (code, ins->dreg+1, s390_r1);
2761                 }
2762                         break;
2763                 case OP_LADD_OVF_UN: {
2764                         s390_alr  (code, s390_r0, ins->sreg1);
2765                         s390_alcr (code, s390_r1, ins->sreg2);
2766                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
2767                         s390_lr   (code, ins->dreg, s390_r0);
2768                         s390_lr   (code, ins->dreg+1, s390_r1);
2769                 }
2770                         break;
2771                 case OP_ADD_OVF_CARRY: {
2772                         CHECK_SRCDST_COM;
2773                         s390_lhi  (code, s390_r0, 0);
2774                         s390_lr   (code, s390_r1, s390_r0);
2775                         s390_alcr (code, s390_r0, s390_r1);
2776                         s390_ar   (code, ins->dreg, src2);
2777                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2778                         s390_ar   (code, ins->dreg, s390_r0);
2779                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2780                 }
2781                         break;
2782                 case OP_ADD_OVF_UN_CARRY: {
2783                         CHECK_SRCDST_COM;
2784                         s390_alcr (code, ins->dreg, src2);
2785                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
2786                 }
2787                         break;
2788                 case OP_SUBCC: {
2789                         CHECK_SRCDST_NCOM;
2790                         s390_slr (code, ins->dreg, src2);
2791                 }
2792                         break;
2793                 case OP_ISUB: {
2794                         CHECK_SRCDST_NCOM;
2795                         s390_sr   (code, ins->dreg, src2);
2796                 }
2797                         break;
2798                 case OP_SBB: {
2799                         CHECK_SRCDST_NCOM;
2800                         s390_slbr (code, ins->dreg, src2);
2801                 }
2802                         break;
2803                 case OP_SUBCC_IMM: {
2804                         if (s390_is_imm16 (-ins->inst_imm)) {
2805                                 if (ins->dreg != ins->sreg1) {
2806                                         s390_lr   (code, ins->dreg, ins->sreg1);
2807                                 }
2808                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2809                                 s390_slr  (code, ins->dreg, s390_r0);
2810                         } else {
2811                                 s390_basr (code, s390_r13, 0);
2812                                 s390_j    (code, 4);
2813                                 s390_word (code, ins->inst_imm);
2814                                 if (ins->dreg != ins->sreg1) {
2815                                         s390_lr   (code, ins->dreg, ins->sreg1);
2816                                 }
2817                                 s390_sl   (code, ins->dreg, 0, s390_r13, 4);
2818                         }
2819                 }
2820                         break;
2821                 case OP_SUB_IMM: {
2822                         if (s390_is_imm16 (-ins->inst_imm)) {
2823                                 if (ins->dreg != ins->sreg1) {
2824                                         s390_lr   (code, ins->dreg, ins->sreg1);
2825                                 }
2826                                 s390_ahi  (code, ins->dreg, -ins->inst_imm);
2827                         } else {
2828                                 s390_basr (code, s390_r13, 0);
2829                                 s390_j    (code, 4);
2830                                 s390_word (code, ins->inst_imm);
2831                                 if (ins->dreg != ins->sreg1) {
2832                                         s390_lr   (code, ins->dreg, ins->sreg1);
2833                                 }
2834                                 s390_s    (code, ins->dreg, 0, s390_r13, 4);
2835                         }
2836                 }
2837                         break;
2838                 case OP_SBB_IMM: {
2839                         if (ins->dreg != ins->sreg1) {
2840                                 s390_lr    (code, ins->dreg, ins->sreg1);
2841                         }
2842                         if (s390_is_imm16 (-ins->inst_imm)) {
2843                                 s390_lhi   (code, s390_r0, ins->inst_imm);
2844                                 s390_slbr  (code, ins->dreg, s390_r0);
2845                         } else {
2846                                 s390_basr (code, s390_r13, 0);
2847                                 s390_j    (code, 4);
2848                                 s390_word (code, ins->inst_imm);
2849                                 s390_slb  (code, ins->dreg, 0, s390_r13, 4);
2850                         }
2851                 }
2852                         break;
2853                 case OP_ISUB_OVF: {
2854                         CHECK_SRCDST_NCOM;
2855                         s390_sr   (code, ins->dreg, src2);
2856                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2857                 }
2858                         break;
2859                 case OP_ISUB_OVF_UN: {
2860                         CHECK_SRCDST_NCOM;
2861                         s390_slr  (code, ins->dreg, src2);
2862                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
2863                 }
2864                         break;
2865                 case OP_LSUB: {
2866                         s390_lr   (code, s390_r14, ins->sreg2);
2867                         s390_slr  (code, s390_r0, ins->sreg1);
2868                         s390_jnl  (code, 4);
2869                         s390_ahi  (code, s390_r14, 1);
2870                         s390_sr   (code, s390_r1, s390_r14);
2871                         s390_lr   (code, ins->dreg, s390_r0);
2872                         s390_lr   (code, ins->dreg+1, s390_r1);
2873                 }
2874                         break;
2875                 case OP_LSUB_OVF: {
2876                         short int *o[1];
2877                         s390_lr   (code, s390_r14, ins->sreg2);
2878                         s390_slr  (code, s390_r0, ins->sreg1);
2879                         s390_jnl  (code, 0); CODEPTR(code, o[0]);
2880                         s390_ahi  (code, s390_r14, 1);
2881                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2882                         PTRSLOT   (code, o[0]);
2883                         s390_sr   (code, s390_r1, s390_r14);
2884                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2885                         s390_lr   (code, ins->dreg, s390_r0);
2886                         s390_lr   (code, ins->dreg+1, s390_r1);
2887                 }
2888                         break;
2889                 case OP_LSUB_OVF_UN: {
2890                         s390_slr  (code, s390_r0, ins->sreg1);
2891                         s390_slbr (code, s390_r1, ins->sreg2);
2892                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, "OverflowException");
2893                         s390_lr   (code, ins->dreg, s390_r0);
2894                         s390_lr   (code, ins->dreg+1, s390_r1);
2895                 }
2896                         break;
2897                 case OP_SUB_OVF_CARRY: {
2898                         CHECK_SRCDST_NCOM;
2899                         s390_lhi  (code, s390_r0, 0);
2900                         s390_lr   (code, s390_r1, s390_r0);
2901                         s390_slbr (code, s390_r0, s390_r1);
2902                         s390_sr   (code, ins->dreg, src2);
2903                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2904                         s390_ar   (code, ins->dreg, s390_r0);
2905                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2906                 }
2907                         break;
2908                 case OP_SUB_OVF_UN_CARRY: {
2909                         CHECK_SRCDST_NCOM;
2910                         s390_slbr (code, ins->dreg, src2);
2911                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
2912                 }
2913                         break;
2914                 case OP_IAND: {
2915                         if (ins->sreg1 == ins->dreg) {
2916                                 s390_nr   (code, ins->dreg, ins->sreg2);
2917                         }
2918                         else {
2919                                 if (ins->sreg2 == ins->dreg) {
2920                                         s390_nr  (code, ins->dreg, ins->sreg1);
2921                                 }
2922                                 else {
2923                                         s390_lr  (code, ins->dreg, ins->sreg1);
2924                                         s390_nr  (code, ins->dreg, ins->sreg2);
2925                                 }
2926                         }
2927                 }
2928                         break;
2929                 case OP_AND_IMM: {
2930                         if (s390_is_imm16 (ins->inst_imm)) {
2931                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2932                                 if (ins->dreg != ins->sreg1) {
2933                                         s390_lr   (code, ins->dreg, ins->sreg1);
2934                                 }
2935                                 s390_nr   (code, ins->dreg, s390_r0);
2936                         } else {
2937                                 s390_basr (code, s390_r13, 0);
2938                                 s390_j    (code, 4);
2939                                 s390_word (code, ins->inst_imm);
2940                                 if (ins->dreg != ins->sreg1) {
2941                                         s390_lr   (code, ins->dreg, ins->sreg1);
2942                                 }
2943                                 s390_n    (code, ins->dreg, 0, s390_r13, 4);
2944                         }
2945                 }
2946                         break;
2947                 case OP_IDIV: {
2948                         s390_lr   (code, s390_r0, ins->sreg1);
2949                         s390_srda (code, s390_r0, 0, 32);
2950                         s390_dr   (code, s390_r0, ins->sreg2);
2951                         s390_lr   (code, ins->dreg, s390_r1);
2952                 }
2953                         break;
2954                 case OP_IDIV_UN: {
2955                         s390_lr   (code, s390_r0, ins->sreg1);
2956                         s390_srdl (code, s390_r0, 0, 32);
2957                         s390_dlr  (code, s390_r0, ins->sreg2);
2958                         s390_lr   (code, ins->dreg, s390_r1);
2959                 }
2960                         break;
2961                 case OP_IREM: {
2962                         s390_lr   (code, s390_r0, ins->sreg1);
2963                         s390_srda (code, s390_r0, 0, 32);
2964                         s390_dr   (code, s390_r0, ins->sreg2);
2965                         s390_lr   (code, ins->dreg, s390_r0);
2966                         break;
2967                 case OP_IREM_UN:
2968                         s390_lr   (code, s390_r0, ins->sreg1);
2969                         s390_srdl (code, s390_r0, 0, 32);
2970                         s390_dlr  (code, s390_r0, ins->sreg2);
2971                         s390_lr   (code, ins->dreg, s390_r0);
2972                 }
2973                         break;
2974                 case OP_IOR: {
2975                         if (ins->sreg1 == ins->dreg) {
2976                                 s390_or   (code, ins->dreg, ins->sreg2);
2977                         }
2978                         else {
2979                                 if (ins->sreg2 == ins->dreg) {
2980                                         s390_or  (code, ins->dreg, ins->sreg1);
2981                                 }
2982                                 else {
2983                                         s390_lr  (code, ins->dreg, ins->sreg1);
2984                                         s390_or  (code, ins->dreg, ins->sreg2);
2985                                 }
2986                         }
2987                 }
2988                         break;
2989                 case OP_OR_IMM: {
2990                         if (s390_is_imm16 (ins->inst_imm)) {
2991                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2992                                 if (ins->dreg != ins->sreg1) {
2993                                         s390_lr   (code, ins->dreg, ins->sreg1);
2994                                 }
2995                                 s390_or   (code, ins->dreg, s390_r0);
2996                         } else {
2997                                 s390_basr (code, s390_r13, 0);
2998                                 s390_j    (code, 4);
2999                                 s390_word (code, ins->inst_imm);
3000                                 if (ins->dreg != ins->sreg1) {
3001                                         s390_lr   (code, ins->dreg, ins->sreg1);
3002                                 }
3003                                 s390_o    (code, ins->dreg, 0, s390_r13, 4);
3004                         }
3005                 }
3006                         break;
3007                 case OP_IXOR: {
3008                         if (ins->sreg1 == ins->dreg) {
3009                                 s390_xr   (code, ins->dreg, ins->sreg2);
3010                         }
3011                         else {
3012                                 if (ins->sreg2 == ins->dreg) {
3013                                         s390_xr  (code, ins->dreg, ins->sreg1);
3014                                 }
3015                                 else {
3016                                         s390_lr  (code, ins->dreg, ins->sreg1);
3017                                         s390_xr  (code, ins->dreg, ins->sreg2);
3018                                 }
3019                         }
3020                 }
3021                         break;
3022                 case OP_XOR_IMM: {
3023                         if (s390_is_imm16 (ins->inst_imm)) {
3024                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3025                                 if (ins->dreg != ins->sreg1) {
3026                                         s390_lr   (code, ins->dreg, ins->sreg1);
3027                                 }
3028                                 s390_xr   (code, ins->dreg, s390_r0);
3029                         } else {
3030                                 s390_basr (code, s390_r13, 0);
3031                                 s390_j    (code, 4);
3032                                 s390_word (code, ins->inst_imm);
3033                                 if (ins->dreg != ins->sreg1) {
3034                                         s390_lr   (code, ins->dreg, ins->sreg1);
3035                                 }
3036                                 s390_x    (code, ins->dreg, 0, s390_r13, 4);
3037                         }
3038                 }
3039                         break;
3040                 case OP_ISHL: {
3041                         CHECK_SRCDST_NCOM;
3042                         s390_sll  (code, ins->dreg, src2, 0);
3043                 }
3044                         break;
3045                 case OP_SHL_IMM: {
3046                         if (ins->sreg1 != ins->dreg) {
3047                                 s390_lr   (code, ins->dreg, ins->sreg1);
3048                         }
3049                         s390_sll  (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3050                 }
3051                         break;
3052                 case OP_ISHR: {
3053                         CHECK_SRCDST_NCOM;
3054                         s390_sra  (code, ins->dreg, src2, 0);
3055                 }
3056                         break;
3057                 case OP_SHR_IMM: {
3058                         if (ins->sreg1 != ins->dreg) {
3059                                 s390_lr   (code, ins->dreg, ins->sreg1);
3060                         }
3061                         s390_sra  (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3062                 }
3063                         break;
3064                 case OP_SHR_UN_IMM: {
3065                         if (ins->sreg1 != ins->dreg) {
3066                                 s390_lr   (code, ins->dreg, ins->sreg1);
3067                         }
3068                         s390_srl  (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3069                 }
3070                         break;
3071                 case OP_ISHR_UN: {
3072                         CHECK_SRCDST_NCOM;
3073                         s390_srl  (code, ins->dreg, src2, 0);
3074                 }
3075                         break;
3076                 case OP_INOT: {
3077                         if (ins->sreg1 != ins->dreg) {
3078                                 s390_lr   (code, ins->dreg, ins->sreg1);
3079                         }
3080                         s390_lhi (code, s390_r0, -1);
3081                         s390_xr  (code, ins->dreg, s390_r0);
3082                 }
3083                         break;
3084                 case OP_INEG: {
3085                         s390_lcr (code, ins->dreg, ins->sreg1);
3086                 }
3087                         break;
3088                 case OP_IMUL: {
3089                         if (ins->sreg1 == ins->dreg) {
3090                                 s390_msr  (code, ins->dreg, ins->sreg2);
3091                         }
3092                         else {
3093                                 if (ins->sreg2 == ins->dreg) {
3094                                         s390_msr (code, ins->dreg, ins->sreg1);
3095                                 }
3096                                 else {
3097                                         s390_lr  (code, ins->dreg, ins->sreg1);
3098                                         s390_msr (code, ins->dreg, ins->sreg2);
3099                                 }
3100                         }
3101                 }
3102                         break;
3103                 case OP_MUL_IMM: {
3104                         if (s390_is_imm16 (ins->inst_imm)) {
3105                                 s390_lhi  (code, s390_r13, ins->inst_imm);
3106                         } else {
3107                                 s390_basr (code, s390_r13, 0);
3108                                 s390_j    (code, 4);
3109                                 s390_word (code, ins->inst_imm);
3110 //                              if (ins->dreg != ins->sreg1) {
3111 //                                      s390_lr   (code, ins->dreg, ins->sreg1);
3112 //                              }
3113                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3114                         }
3115                         if (ins->dreg != ins->sreg1) {
3116                                 s390_lr   (code, ins->dreg, ins->sreg1);
3117                         }
3118                         s390_msr  (code, ins->dreg, s390_r13);
3119                 }
3120                         break;
3121                 case OP_IMUL_OVF: {
3122                         short int *o[2];
3123                         s390_ltr  (code, s390_r1, ins->sreg1);
3124                         s390_jz   (code, 0); CODEPTR(code, o[0]);
3125                         s390_ltr  (code, s390_r0, ins->sreg2);
3126                         s390_jnz  (code, 6);
3127                         s390_lhi  (code, s390_r1, 0);
3128                         s390_j    (code, 0); CODEPTR(code, o[1]);
3129                         s390_xr   (code, s390_r0, s390_r1);
3130                         s390_msr  (code, s390_r1, ins->sreg2);
3131                         s390_xr   (code, s390_r0, s390_r1);
3132                         s390_srl  (code, s390_r0, 0, 31);
3133                         s390_ltr  (code, s390_r0, s390_r0);
3134                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3135                         PTRSLOT   (code, o[0]);
3136                         PTRSLOT   (code, o[1]);
3137                         s390_lr   (code, ins->dreg, s390_r1);
3138                 }
3139                         break;
3140                 case OP_IMUL_OVF_UN: {
3141                         s390_lhi  (code, s390_r0, 0);
3142                         s390_lr   (code, s390_r1, ins->sreg1);
3143                         s390_mlr  (code, s390_r0, ins->sreg2);
3144                         s390_ltr  (code, s390_r0, s390_r0);
3145                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3146                         s390_lr   (code, ins->dreg, s390_r1);
3147                 }
3148                         break;
3149                 case OP_LMUL: {
3150                         s390_l    (code, s390_r0, 0, ins->sreg1, 4);
3151                         s390_srda (code, s390_r0, 0, 32);
3152                         s390_m    (code, s390_r0, 0, ins->sreg2, 4);
3153                         s390_l    (code, s390_r0, 0, ins->sreg1, 4);
3154                         s390_srl  (code, s390_r0, 0, 31);
3155                         s390_a    (code, s390_r0, 0, ins->sreg1, 0);
3156                         s390_l    (code, s390_r13, 0, ins->sreg2, 0);
3157                         s390_srl  (code, s390_r13, 0, 31);
3158                         s390_ms   (code, s390_r13, 0, ins->sreg1, 4);
3159                         s390_ar   (code, s390_r0, s390_r13);
3160                         s390_st   (code, s390_r0, 0, ins->dreg, 0);
3161                         s390_st   (code, s390_r1, 0, ins->dreg, 4);
3162                 }
3163                         break;
3164                 case OP_ICONST: {
3165                         if (s390_is_imm16(ins->inst_c0)) {
3166                                 s390_lhi  (code, ins->dreg, ins->inst_c0);
3167                         } else {
3168                                 s390_basr (code, s390_r13, 0);
3169                                 s390_j    (code, 4);
3170                                 s390_word (code, ins->inst_c0);
3171                                 s390_l    (code, ins->dreg, 0, s390_r13, 4);
3172                         }
3173                 }
3174                         break;
3175                 case OP_AOTCONST: {
3176                         s390_basr (code, s390_r13, 0);
3177                         s390_j    (code, 4);
3178                         mono_add_patch_info (cfg, code - cfg->native_code,
3179                                 (MonoJumpInfoType)ins->inst_i1, ins->inst_p0);
3180                         s390_word (code, 0);
3181                         s390_l    (code,ins->dreg, 0, s390_r13, 4);
3182                 }
3183                         break;
3184                 case OP_ICONV_TO_I4:
3185                 case OP_ICONV_TO_U4:
3186                 case OP_MOVE: {
3187                         if (ins->dreg != ins->sreg1) {
3188                                 s390_lr (code, ins->dreg, ins->sreg1);
3189                         }
3190                 }
3191                         break;
3192                 case OP_SETLRET: {
3193                         int saved = ins->sreg1;
3194                         if (ins->sreg1 == s390_r2) {
3195                                 s390_lr (code, s390_r0, ins->sreg1);
3196                                 saved = s390_r0;
3197                         }
3198                         if (ins->sreg2 != s390_r2)
3199                                 s390_lr (code, s390_r2, ins->sreg2);
3200                         if (saved != s390_r3)
3201                                 s390_lr (code, s390_r3, saved);
3202                         break;
3203                 }
3204                 case OP_FMOVE: {
3205                         if (ins->dreg != ins->sreg1) {
3206                                 s390_ldr   (code, ins->dreg, ins->sreg1);
3207                         }
3208                 }
3209                         break;
3210                 case OP_S390_SETF4RET: {
3211                         s390_ledbr (code, ins->dreg, ins->sreg1);
3212                 }
3213                         break;
3214                 case OP_TLS_GET: {
3215                         if (s390_is_imm16 (ins->inst_offset)) {
3216                                 s390_lhi (code, s390_r13, ins->inst_offset);
3217                         } else {
3218                                 s390_bras (code, s390_r13, 0);
3219                                 s390_j    (code, 4);
3220                                 s390_word (code, ins->inst_offset);
3221                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3222                         }
3223                         s390_ear (code, s390_r1, 0);
3224                         s390_l   (code, ins->dreg, s390_r13, s390_r1, 0);
3225                 }
3226                         break;
3227                 case OP_FCONV_TO_R4: {
3228                         NOT_IMPLEMENTED;
3229                         next = mono_inst_list_next (&ins->node, &bb->ins_list);
3230                         if ((next) &&
3231                              (next->opcode != OP_FMOVE) &&
3232                              (next->opcode != OP_STORER4_MEMBASE_REG))
3233                                 s390_ledbr (code, ins->dreg, ins->sreg1);
3234                 }
3235                         break;
3236                 case OP_JMP: {
3237                         if (cfg->method->save_lmf)
3238                                 restoreLMF(code, cfg->frame_reg, cfg->stack_usage);
3239
3240                         if (cfg->flags & MONO_CFG_HAS_TAIL) {
3241                                 code = emit_load_volatile_registers(code, cfg);
3242                         }
3243
3244                         code = backUpStackPtr(cfg, code, STK_BASE);
3245                         s390_l   (code, s390_r14, 0, STK_BASE, S390_RET_ADDR_OFFSET);
3246                         mono_add_patch_info (cfg, code - cfg->native_code,
3247                                              MONO_PATCH_INFO_METHOD_JUMP,
3248                                              ins->inst_p0);
3249                         s390_jcl (code, S390_CC_UN, 0);
3250                 }
3251                         break;
3252                 case OP_CHECK_THIS: {
3253                         /* ensure ins->sreg1 is not NULL */
3254                         s390_icm (code, s390_r0, 15, ins->sreg1, 0);
3255                 }
3256                         break;
3257                 case OP_ARGLIST: {
3258                         int offset = cfg->sig_cookie + cfg->stack_usage;
3259
3260                         if (s390_is_imm16 (offset))
3261                                 s390_lhi  (code, s390_r0, offset);
3262                         else {
3263                                 s390_basr (code, s390_r13, 0);
3264                                 s390_j    (code, 4);
3265                                 s390_word (code, offset);
3266                                 s390_l    (code, s390_r0, 0, s390_r13, 0);
3267                         }
3268                         s390_ar   (code, s390_r0, cfg->frame_reg);
3269                         s390_st   (code, s390_r0, 0, ins->sreg1, 0);
3270                 }
3271                         break;
3272                 case OP_FCALL: {
3273                         call = (MonoCallInst*)ins;
3274                         if (ins->flags & MONO_INST_HAS_METHOD)
3275                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_METHOD,
3276                                                      call->method);
3277                         else
3278                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS,
3279                                                      call->fptr);
3280                         s390_brasl (code, s390_r14, 0);
3281                         if (call->signature->ret->type == MONO_TYPE_R4)
3282                                 s390_ldebr (code, s390_f0, s390_f0);
3283                 }
3284                         break;
3285                 case OP_LCALL:
3286                 case OP_VCALL:
3287                 case OP_VOIDCALL:
3288                 case OP_CALL: {
3289                         call = (MonoCallInst*)ins;
3290                         if (ins->flags & MONO_INST_HAS_METHOD)
3291                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_METHOD, call->method);
3292                         else
3293                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS, call->fptr);
3294                         s390_brasl (code, s390_r14, 0);
3295                 }
3296                         break;
3297                 case OP_FCALL_REG: {
3298                         call = (MonoCallInst*)ins;
3299                         s390_lr   (code, s390_r1, ins->sreg1);
3300                         s390_basr (code, s390_r14, s390_r1);
3301                         if (call->signature->ret->type == MONO_TYPE_R4)
3302                                 s390_ldebr (code, s390_f0, s390_f0);
3303                 }
3304                         break;
3305                 case OP_LCALL_REG:
3306                 case OP_VCALL_REG:
3307                 case OP_VOIDCALL_REG:
3308                 case OP_CALL_REG: {
3309                         s390_lr   (code, s390_r1, ins->sreg1);
3310                         s390_basr (code, s390_r14, s390_r1);
3311                 }
3312                         break;
3313                 case OP_LCALL_MEMBASE:
3314                 case OP_VCALL_MEMBASE:
3315                 case OP_VOIDCALL_MEMBASE:
3316                 case OP_FCALL_MEMBASE:
3317                 case OP_CALL_MEMBASE: {
3318                         call = (MonoCallInst*)ins;
3319                         if (s390_is_uimm12(ins->inst_offset))
3320                                 s390_l    (code, s390_r1, 0, ins->inst_basereg, ins->inst_offset);
3321                         else {
3322                                 if (s390_is_imm16(ins->inst_offset)) {
3323                                         s390_lhi (code, s390_r13, ins->inst_offset);
3324                                         s390_l   (code, s390_r1, s390_r13, ins->inst_basereg, 0);
3325                                 } else {
3326                                         s390_basr (code, s390_r13, 0);
3327                                         s390_j    (code, 4);
3328                                         s390_word (code, ins->inst_offset);
3329                                         s390_l    (code, s390_r13, 0, s390_r13, 4);
3330                                         s390_l    (code, s390_r1, s390_r13, ins->inst_basereg, 0);
3331                                 }
3332                         }
3333                         s390_basr (code, s390_r14, s390_r1);
3334                         if (ins->opcode == OP_FCALL_MEMBASE && call->signature->ret->type == MONO_TYPE_R4)
3335                                 s390_ldebr (code, s390_f0, s390_f0);
3336                 }
3337                         break;
3338                 case OP_OUTARG:
3339                         g_assert_not_reached ();
3340                         break;
3341                 case OP_LOCALLOC: {
3342                         /*------------------------------------------*/
3343                         /* To allocate space on the stack we have   */
3344                         /* to allow room for parameters passed in   */
3345                         /* calls, the backchain pointer and round   */
3346                         /* it to our stack alignment requirements   */
3347                         /*------------------------------------------*/
3348                         int alloca_skip = S390_MINIMAL_STACK_SIZE + cfg->param_area;
3349                         int area_offset = S390_ALIGN(alloca_skip, S390_STACK_ALIGNMENT);
3350                         s390_lr   (code, s390_r1, ins->sreg1);
3351                         if (ins->flags & MONO_INST_INIT)
3352                                 s390_lr   (code, s390_r0, ins->sreg1);
3353                         s390_ahi  (code, s390_r1, 14);
3354                         s390_srl  (code, s390_r1, 0, 3);
3355                         s390_sll  (code, s390_r1, 0, 3);
3356                         if (cfg->method->save_lmf) {
3357                                 /*----------------------------------*/
3358                                 /* we have to adjust lmf ebp value  */
3359                                 /*----------------------------------*/
3360                                 int lmfOffset = cfg->stack_usage - sizeof(MonoLMF);
3361
3362                                 s390_lr (code, s390_r13, cfg->frame_reg);
3363                                 if (s390_is_uimm16(lmfOffset))
3364                                         s390_ahi   (code, s390_r13, lmfOffset);
3365                                 else {
3366                                         s390_basr (code, s390_r14, 0);
3367                                         s390_j    (code, 4);
3368                                         s390_word (code, lmfOffset);
3369                                         s390_a    (code, s390_r13, 0, s390_r14, 4);
3370                                 }
3371                                 s390_lr (code, s390_r14, STK_BASE);
3372                                 s390_sr (code, s390_r14, s390_r1);
3373                                 s390_st (code, s390_r14, 0, s390_r13,
3374                                          G_STRUCT_OFFSET(MonoLMF, ebp));
3375                         }
3376                         s390_l    (code, s390_r13, 0, STK_BASE, 0);
3377                         s390_sr   (code, STK_BASE, s390_r1);
3378                         s390_st   (code, s390_r13, 0, STK_BASE, 0);
3379                         s390_la   (code, ins->dreg, 0, STK_BASE, area_offset);
3380                         s390_srl  (code, ins->dreg, 0, 3);
3381                         s390_sll  (code, ins->dreg, 0, 3);
3382                         if (ins->flags & MONO_INST_INIT) {
3383                                 s390_lr   (code, s390_r1, s390_r0);
3384                                 s390_lr   (code, s390_r0, ins->dreg);
3385                                 s390_lr   (code, s390_r14, s390_r12);
3386                                 s390_lhi  (code, s390_r13, 0);
3387                                 s390_mvcle(code, s390_r0, s390_r12, 0, 0);
3388                                 s390_jo   (code, -2);
3389                                 s390_lr   (code, s390_r12, s390_r14);
3390                         }
3391                 }
3392                         break;
3393                 case OP_THROW: {
3394                         s390_lr (code, s390_r2, ins->sreg1);
3395                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD,
3396                                              (gpointer)"mono_arch_throw_exception");
3397                         s390_brasl (code, s390_r14, 0);
3398                 }
3399                         break;
3400                 case OP_RETHROW: {
3401                         s390_lr (code, s390_r2, ins->sreg1);
3402                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD,
3403                                              (gpointer)"mono_arch_rethrow_exception");
3404                         s390_brasl (code, s390_r14, 0);
3405                 }
3406                         break;
3407                 case OP_START_HANDLER: {
3408                         if (s390_is_uimm12 (ins->inst_left->inst_offset)) {
3409                                 s390_st   (code, s390_r14, 0,
3410                                            ins->inst_left->inst_basereg,
3411                                            ins->inst_left->inst_offset);
3412                         } else {
3413                                 s390_basr (code, s390_r13, 0);
3414                                 s390_j    (code, 4);
3415                                 s390_word (code, ins->inst_left->inst_offset);
3416                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3417                                 s390_st   (code, s390_r14, s390_r13,
3418                                            ins->inst_left->inst_basereg, 0);
3419                         }
3420                 }
3421                         break;
3422                 case OP_ENDFILTER: {
3423                         if (ins->sreg1 != s390_r2)
3424                                 s390_lr (code, s390_r2, ins->sreg1);
3425                         if (s390_is_uimm12 (ins->inst_left->inst_offset)) {
3426                                 s390_l  (code, s390_r14, 0, ins->inst_left->inst_basereg,
3427                                          ins->inst_left->inst_offset);
3428                         } else {
3429                                 s390_basr (code, s390_r13, 0);
3430                                 s390_j    (code, 4);
3431                                 s390_word (code, ins->inst_left->inst_offset);
3432                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3433                                 s390_l    (code, s390_r14, s390_r13,
3434                                            ins->inst_left->inst_basereg, 0);
3435                         }
3436                         s390_br  (code, s390_r14);
3437                 }
3438                         break;
3439                 case OP_ENDFINALLY: {
3440                         if (s390_is_uimm12 (ins->inst_left->inst_offset)) {
3441                                 s390_l  (code, s390_r14, 0, ins->inst_left->inst_basereg,
3442                                          ins->inst_left->inst_offset);
3443                         } else {
3444                                 s390_basr (code, s390_r13, 0);
3445                                 s390_j    (code, 4);
3446                                 s390_word (code, ins->inst_left->inst_offset);
3447                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3448                                 s390_l    (code, s390_r14, s390_r13,
3449                                            ins->inst_left->inst_basereg, 0);
3450                         }
3451                         s390_br  (code, s390_r14);
3452                 }
3453                         break;
3454                 case OP_CALL_HANDLER: {
3455                         mono_add_patch_info (cfg, code-cfg->native_code,
3456                                              MONO_PATCH_INFO_BB, ins->inst_target_bb);
3457                         s390_brasl (code, s390_r14, 0);
3458                 }
3459                         break;
3460                 case OP_LABEL: {
3461                         ins->inst_c0 = code - cfg->native_code;
3462                 }
3463                         break;
3464                 case OP_BR:
3465                         EMIT_UNCOND_BRANCH(ins);
3466                         break;
3467                 case OP_BR_REG: {
3468                         s390_br  (code, ins->sreg1);
3469                 }
3470                         break;
3471                 case OP_CEQ: {
3472                         s390_lhi (code, ins->dreg, 1);
3473                         s390_jz  (code, 4);
3474                         s390_lhi (code, ins->dreg, 0);
3475                 }
3476                         break;
3477                 case OP_CLT: {
3478                         s390_lhi (code, ins->dreg, 1);
3479                         s390_jl  (code, 4);
3480                         s390_lhi (code, ins->dreg, 0);
3481                 }
3482                         break;
3483                 case OP_CLT_UN: {
3484                         s390_lhi (code, ins->dreg, 1);
3485                         s390_jlo (code, 4);
3486                         s390_lhi (code, ins->dreg, 0);
3487                 }
3488                         break;
3489                 case OP_CGT: {
3490                         s390_lhi (code, ins->dreg, 1);
3491                         s390_jh  (code, 4);
3492                         s390_lhi (code, ins->dreg, 0);
3493                 }
3494                         break;
3495                 case OP_CGT_UN: {
3496                         s390_lhi (code, ins->dreg, 1);
3497                         s390_jho (code, 4);
3498                         s390_lhi (code, ins->dreg, 0);
3499                 }
3500                         break;
3501                 case OP_COND_EXC_EQ:
3502                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_EQ, ins->inst_p1);
3503                         break;
3504                 case OP_COND_EXC_NE_UN:
3505                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NE, ins->inst_p1);
3506                         break;
3507                 case OP_COND_EXC_LT:
3508                 case OP_COND_EXC_LT_UN:
3509                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, ins->inst_p1);
3510                         break;
3511                 case OP_COND_EXC_GT:
3512                 case OP_COND_EXC_GT_UN:
3513                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GT, ins->inst_p1);
3514                         break;
3515                 case OP_COND_EXC_GE:
3516                 case OP_COND_EXC_GE_UN:
3517                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GE, ins->inst_p1);
3518                         break;
3519                 case OP_COND_EXC_LE:
3520                 case OP_COND_EXC_LE_UN:
3521                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LE, ins->inst_p1);
3522                         break;
3523                 case OP_COND_EXC_OV:
3524                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, ins->inst_p1);
3525                         break;
3526                 case OP_COND_EXC_NO:
3527                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NO, ins->inst_p1);
3528                         break;
3529                 case OP_COND_EXC_C:
3530                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, ins->inst_p1);
3531                         break;
3532                 case OP_COND_EXC_NC:
3533                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, ins->inst_p1);
3534                         break;
3535                 case OP_IBEQ:
3536                         EMIT_COND_BRANCH (ins, S390_CC_EQ);
3537                         break;
3538                 case OP_IBNE_UN:
3539                         EMIT_COND_BRANCH (ins, S390_CC_NE);
3540                         break;
3541                 case OP_IBLT:
3542                 case OP_IBLT_UN:
3543                         EMIT_COND_BRANCH (ins, S390_CC_LT);
3544                         break;
3545                 case OP_IBGT:
3546                 case OP_IBGT_UN:
3547                         EMIT_COND_BRANCH (ins, S390_CC_GT);
3548                         break;
3549                 case OP_IBGE:
3550                 case OP_IBGE_UN:
3551                         EMIT_COND_BRANCH (ins, S390_CC_GE);
3552                         break;
3553                 case OP_IBLE:
3554                 case OP_IBLE_UN:
3555                         EMIT_COND_BRANCH (ins, S390_CC_LE);
3556                         break;
3557
3558                 /* floating point opcodes */
3559                 case OP_R8CONST: {
3560                         if (*((float *) ins->inst_p0) == 0) {
3561                                 s390_lzdr (code, ins->dreg);
3562                         } else {
3563                                 s390_basr  (code, s390_r13, 0);
3564                                 s390_j     (code, 4);
3565                                 s390_word  (code, ins->inst_p0);
3566                                 s390_l     (code, s390_r13, 0, s390_r13, 4);
3567                                 s390_ld    (code, ins->dreg, 0, s390_r13, 0);
3568                         }
3569                 }
3570                         break;
3571                 case OP_R4CONST: {
3572                         if (*((float *) ins->inst_p0) == 0) {
3573                                 s390_lzdr (code, ins->dreg);
3574                         } else {
3575                                 s390_basr (code, s390_r13, 0);
3576                                 s390_j    (code, 4);
3577                                 s390_word (code, ins->inst_p0);
3578                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3579                                 s390_ldeb (code, ins->dreg, 0, s390_r13, 0);
3580                         }
3581                 }
3582                         break;
3583                 case OP_STORER8_MEMBASE_REG: {
3584                         if (s390_is_uimm12(ins->inst_offset)) {
3585                                 s390_std  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
3586                         } else {
3587                                 s390_basr (code, s390_r13, 0);
3588                                 s390_j    (code, 4);
3589                                 s390_word (code, ins->inst_offset);
3590                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3591                                 s390_std  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
3592                         }
3593                 }
3594                         break;
3595                 case OP_LOADR8_MEMBASE: {
3596                         if (s390_is_uimm12(ins->inst_offset)) {
3597                                 s390_ld   (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
3598                         } else {
3599                                 s390_basr (code, s390_r13, 0);
3600                                 s390_j    (code, 4);
3601                                 s390_word (code, ins->inst_offset);
3602                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3603                                 s390_ld   (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
3604                         }
3605                 }
3606                         break;
3607                 case OP_STORER4_MEMBASE_REG: {
3608                         if (s390_is_uimm12(ins->inst_offset)) {
3609                                 s390_ledbr(code, s390_f15, ins->sreg1);
3610                                 s390_ste  (code, s390_f15, 0, ins->inst_destbasereg, ins->inst_offset);
3611                         } else {
3612                                 s390_basr (code, s390_r13, 0);
3613                                 s390_j    (code, 4);
3614                                 s390_word (code, ins->inst_offset);
3615                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3616                                 s390_ledbr(code, s390_f15, ins->sreg1);
3617                                 s390_ste  (code, s390_f15, s390_r13, ins->inst_destbasereg, 0);
3618                         }
3619                 }
3620                         break;
3621                 case OP_LOADR4_MEMBASE: {
3622                         if (s390_is_uimm12(ins->inst_offset)) {
3623                                 s390_ldeb (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_ldeb (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
3630                         }
3631                 }
3632                         break;
3633                 case OP_ICONV_TO_R_UN: {
3634                         s390_cdfbr (code, ins->dreg, ins->sreg1);
3635                         s390_ltr   (code, ins->sreg1, ins->sreg1);
3636                         s390_jnl   (code, 12);
3637                         s390_basr  (code, s390_r13, 0);
3638                         s390_j     (code, 6);
3639                         s390_word  (code, 0x41f00000);
3640                         s390_word  (code, 0);
3641                         s390_adb   (code, ins->dreg, 0, s390_r13, 4);
3642                 }
3643                         break;
3644                 case OP_ICONV_TO_R4: {
3645                         s390_cdfbr (code, ins->dreg, ins->sreg1);
3646                 }
3647                         break;
3648                 case OP_ICONV_TO_R8: {
3649                         s390_cdfbr (code, ins->dreg, ins->sreg1);
3650                 }
3651                         break;
3652                 case OP_FCONV_TO_I1:
3653                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 1, TRUE);
3654                         break;
3655                 case OP_FCONV_TO_U1:
3656                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 1, FALSE);
3657                         break;
3658                 case OP_FCONV_TO_I2:
3659                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 2, TRUE);
3660                         break;
3661                 case OP_FCONV_TO_U2:
3662                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 2, FALSE);
3663                         break;
3664                 case OP_FCONV_TO_I4:
3665                 case OP_FCONV_TO_I:
3666                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 4, TRUE);
3667                         break;
3668                 case OP_FCONV_TO_U4:
3669                 case OP_FCONV_TO_U:
3670                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 4, FALSE);
3671                         break;
3672                 case OP_FCONV_TO_I8:
3673                 case OP_FCONV_TO_U8:
3674                         g_assert_not_reached ();
3675                         /* Implemented as helper calls */
3676                         break;
3677                 case OP_LCONV_TO_R_UN:
3678                         g_assert_not_reached ();
3679                         /* Implemented as helper calls */
3680                         break;
3681                 case OP_LCONV_TO_OVF_I: {
3682                         /* Valid ints: 0xffffffff:8000000 to 00000000:0x7f000000 */
3683                         short int *o[5];
3684                         s390_ltr  (code, ins->sreg1, ins->sreg1);
3685                         s390_jnl  (code, 0); CODEPTR(code, o[0]);
3686                         s390_ltr  (code, ins->sreg2, ins->sreg2);
3687                         s390_jnl  (code, 0); CODEPTR(code, o[1]);
3688                         s390_lhi  (code, s390_r13, -1);
3689                         s390_cr   (code, ins->sreg2, s390_r13);
3690                         s390_jnz  (code, 0); CODEPTR(code, o[2]);
3691                         s390_j    (code, 0); CODEPTR(code, o[3]);
3692                         PTRSLOT(code, o[0]);
3693                         s390_ltr  (code, ins->sreg2, ins->sreg2);
3694                         s390_jz   (code, 0); CODEPTR(code, o[4]);
3695                         PTRSLOT(code, o[1]);
3696                         PTRSLOT(code, o[2]);
3697                         mono_add_patch_info (cfg, code - cfg->native_code,
3698                                              MONO_PATCH_INFO_EXC, "OverflowException");
3699                         s390_brasl (code, s390_r14, 0);
3700                         PTRSLOT(code, o[3]);
3701                         PTRSLOT(code, o[4]);
3702                         if (ins->dreg != ins->sreg1)
3703                                 s390_lr   (code, ins->dreg, ins->sreg1);
3704                 }
3705                         break;
3706                 case OP_SQRT: {
3707                         s390_sqdbr (code, ins->dreg, ins->sreg1);
3708                 }
3709                         break;
3710                 case OP_FADD: {
3711                         CHECK_SRCDST_COM_F;
3712                         s390_adbr (code, ins->dreg, src2);
3713                 }
3714                         break;
3715                 case OP_FSUB: {
3716                         CHECK_SRCDST_NCOM_F;
3717                         s390_sdbr (code, ins->dreg, src2);
3718                 }
3719                         break;
3720                 case OP_FMUL: {
3721                         CHECK_SRCDST_COM_F;
3722                         s390_mdbr (code, ins->dreg, src2);
3723                 }
3724                         break;
3725                 case OP_FDIV: {
3726                         CHECK_SRCDST_NCOM_F;
3727                         s390_ddbr (code, ins->dreg, src2);
3728                 }
3729                         break;
3730                 case OP_FNEG: {
3731                         s390_lcdbr (code, ins->dreg, ins->sreg1);
3732                 }
3733                         break;
3734                 case OP_FREM: {
3735                         CHECK_SRCDST_NCOM_F;
3736                         s390_didbr (code, ins->dreg, src2, 5, s390_f15);
3737                 }
3738                         break;
3739                 case OP_FCOMPARE: {
3740                         s390_cdbr (code, ins->sreg1, ins->sreg2);
3741                 }
3742                         break;
3743                 case OP_FCEQ: {
3744                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3745                         s390_lhi   (code, ins->dreg, 1);
3746                         s390_je    (code, 4);
3747                         s390_lhi   (code, ins->dreg, 0);
3748                 }
3749                         break;
3750                 case OP_FCLT: {
3751                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3752                         s390_lhi   (code, ins->dreg, 1);
3753                         s390_jl    (code, 4);
3754                         s390_lhi   (code, ins->dreg, 0);
3755                 }
3756                         break;
3757                 case OP_FCLT_UN: {
3758                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3759                         s390_lhi   (code, ins->dreg, 1);
3760                         s390_jlo   (code, 4);
3761                         s390_lhi   (code, ins->dreg, 0);
3762                 }
3763                         break;
3764                 case OP_FCGT: {
3765                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3766                         s390_lhi   (code, ins->dreg, 1);
3767                         s390_jh    (code, 4);
3768                         s390_lhi   (code, ins->dreg, 0);
3769                 }
3770                         break;
3771                 case OP_FCGT_UN: {
3772                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3773                         s390_lhi   (code, ins->dreg, 1);
3774                         s390_jho   (code, 4);
3775                         s390_lhi   (code, ins->dreg, 0);
3776                 }
3777                         break;
3778                 case OP_FBEQ: {
3779                         short *o;
3780                         s390_jo (code, 0); CODEPTR(code, o);
3781                         EMIT_COND_BRANCH (ins, S390_CC_EQ);
3782                         PTRSLOT(code, o);
3783                 }
3784                         break;
3785                 case OP_FBNE_UN:
3786                         EMIT_COND_BRANCH (ins, S390_CC_NE|S390_CC_OV);
3787                         break;
3788                 case OP_FBLT: {
3789                         short *o;
3790                         s390_jo (code, 0); CODEPTR(code, o);
3791                         EMIT_COND_BRANCH (ins, S390_CC_LT);
3792                         PTRSLOT(code, o);
3793                 }
3794                         break;
3795                 case OP_FBLT_UN:
3796                         EMIT_COND_BRANCH (ins, S390_CC_LT|S390_CC_OV);
3797                         break;
3798                 case OP_FBGT: {
3799                         short *o;
3800                         s390_jo (code, 0); CODEPTR(code, o);
3801                         EMIT_COND_BRANCH (ins, S390_CC_GT);
3802                         PTRSLOT(code, o);
3803                 }
3804                         break;
3805                 case OP_FBGT_UN:
3806                         EMIT_COND_BRANCH (ins, S390_CC_GT|S390_CC_OV);
3807                         break;
3808                 case OP_FBGE: {
3809                         short *o;
3810                         s390_jo (code, 0); CODEPTR(code, o);
3811                         EMIT_COND_BRANCH (ins, S390_CC_GE);
3812                         PTRSLOT(code, o);
3813                 }
3814                         break;
3815                 case OP_FBGE_UN:
3816                         EMIT_COND_BRANCH (ins, S390_CC_GE|S390_CC_OV);
3817                         break;
3818                 case OP_FBLE: {
3819                         short *o;
3820                         s390_jo (code, 0); CODEPTR(code, o);
3821                         EMIT_COND_BRANCH (ins, S390_CC_LE);
3822                         PTRSLOT(code, o);
3823                 }
3824                         break;
3825                 case OP_FBLE_UN:
3826                         EMIT_COND_BRANCH (ins, S390_CC_LE|S390_CC_OV);
3827                         break;
3828                 case OP_CKFINITE: {
3829                         short *o;
3830                         s390_lhi  (code, s390_r13, 0x7f);
3831                         s390_tcdb (code, ins->sreg1, 0, s390_r13, 0);
3832                         s390_jz   (code, 0); CODEPTR(code, o);
3833                         mono_add_patch_info (cfg, code - cfg->native_code,
3834                                              MONO_PATCH_INFO_EXC, "ArithmeticException");
3835                         s390_brasl (code, s390_r14,0);
3836                         PTRSLOT(code, o);
3837                 }
3838                         break;
3839                 case OP_S390_MOVE: {
3840                         if (ins->backend.size > 0) {
3841                                 if (ins->backend.size <= 256) {
3842                                         s390_mvc  (code, ins->backend.size, ins->dreg,
3843                                                    ins->inst_offset, ins->sreg1, ins->inst_imm);
3844                                 } else {
3845                                         s390_lr   (code, s390_r0, ins->dreg);
3846                                         if (s390_is_imm16 (ins->inst_offset)) {
3847                                                 s390_ahi  (code, s390_r0, ins->inst_offset);
3848                                         } else {
3849                                                 s390_basr (code, s390_r13, 0);
3850                                                 s390_j    (code, 4);
3851                                                 s390_word (code, ins->inst_offset);
3852                                                 s390_a    (code, s390_r0, 0, s390_r13, 4);
3853                                         }
3854                                         s390_lr   (code, s390_r14, s390_r12);
3855                                         s390_lr   (code, s390_r12, ins->sreg1);
3856                                         if (s390_is_imm16 (ins->inst_imm)) {
3857                                                 s390_ahi  (code, s390_r12, ins->inst_imm);
3858                                         } else {
3859                                                 s390_basr (code, s390_r13, 0);
3860                                                 s390_j    (code, 4);
3861                                                 s390_word (code, ins->inst_imm);
3862                                                 s390_a    (code, s390_r12, 0, s390_r13, 4);
3863                                         }
3864                                         s390_lr   (code, s390_r1, ins->sreg1);
3865                                         s390_lr   (code, s390_r13, s390_r1);
3866                                         s390_mvcle(code, s390_r0, s390_r12, 0, 0);
3867                                         s390_jo   (code, -2);
3868                                         s390_lr   (code, s390_r12, s390_r14);
3869                                 }
3870                         }
3871                 }
3872                         break;
3873                 case OP_ATOMIC_ADD_I4: {
3874                         s390_lr  (code, s390_r1, ins->sreg2);
3875                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
3876                         s390_a   (code, s390_r1, 0, ins->inst_basereg, ins->inst_offset);
3877                         s390_cs  (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
3878                         s390_jnz (code, -7);
3879                         s390_lr  (code, ins->dreg, s390_r1);
3880                 }
3881                         break;
3882                 case OP_ATOMIC_ADD_NEW_I4: {
3883                         s390_lr  (code, s390_r1, ins->sreg2);
3884                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
3885                         s390_a   (code, s390_r1, 0, ins->inst_basereg, ins->inst_offset);
3886                         s390_cs  (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
3887                         s390_jnz (code, -7);
3888                         s390_lr  (code, ins->dreg, s390_r1);
3889                 }
3890                         break;
3891                 case OP_ATOMIC_EXCHANGE_I4: {
3892                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
3893                         s390_cs  (code, s390_r0, ins->sreg2, ins->inst_basereg, ins->inst_offset);
3894                         s390_jnz (code, -4);
3895                         s390_lr  (code, ins->dreg, s390_r0);
3896                 }
3897                         break;
3898                 case OP_S390_BKCHAIN: {
3899                         s390_lr  (code, ins->dreg, ins->sreg1);
3900                         if (s390_is_imm16 (cfg->stack_offset)) {
3901                                 s390_ahi (code, ins->dreg, cfg->stack_offset);
3902                         } else {
3903                                 s390_basr (code, s390_r13, 0);
3904                                 s390_j    (code, 6);
3905                                 s390_word (code, cfg->stack_offset);
3906                                 s390_a    (code, ins->dreg, 0, s390_r13, 4);
3907                         }
3908                 }
3909                 case OP_MEMORY_BARRIER: {
3910                 }
3911                         break;
3912                 default:
3913                         g_warning ("unknown opcode %s in %s()\n", mono_inst_name (ins->opcode), __FUNCTION__);
3914                         g_assert_not_reached ();
3915                 }
3916
3917                 if ((cfg->opt & MONO_OPT_BRANCH) && ((code - cfg->native_code - offset) > max_len)) {
3918                         g_warning ("wrong maximal instruction length of instruction %s (expected %d, got %d)",
3919                                    mono_inst_name (ins->opcode), max_len, code - cfg->native_code - offset);
3920                         g_assert_not_reached ();
3921                 }
3922
3923                 cpos += max_len;
3924
3925                 last_offset = offset;
3926         }
3927
3928         cfg->code_len = code - cfg->native_code;
3929 }
3930
3931 /*========================= End of Function ========================*/
3932
3933 /*------------------------------------------------------------------*/
3934 /*                                                                  */
3935 /* Name         - mono_arch_register_lowlevel_calls                 */
3936 /*                                                                  */
3937 /* Function     - Register routines to help with --trace operation. */
3938 /*                                                                  */
3939 /*------------------------------------------------------------------*/
3940
3941 void
3942 mono_arch_register_lowlevel_calls (void)
3943 {
3944         mono_register_jit_icall (mono_arch_get_lmf_addr, "mono_arch_get_lmf_addr", NULL, TRUE);
3945 }
3946
3947 /*========================= End of Function ========================*/
3948
3949 /*------------------------------------------------------------------*/
3950 /*                                                                  */
3951 /* Name         - mono_arch_patch_code                              */
3952 /*                                                                  */
3953 /* Function     - Process the patch data created during the         */
3954 /*                instruction build process. This resolves jumps,   */
3955 /*                calls, variables etc.                             */
3956 /*                                                                  */
3957 /*------------------------------------------------------------------*/
3958
3959 void
3960 mono_arch_patch_code (MonoMethod *method, MonoDomain *domain,
3961                       guint8 *code, MonoJumpInfo *ji, gboolean run_cctors)
3962 {
3963         MonoJumpInfo *patch_info;
3964
3965         for (patch_info = ji; patch_info; patch_info = patch_info->next) {
3966                 unsigned char *ip = patch_info->ip.i + code;
3967                 gconstpointer target = NULL;
3968
3969                 target = mono_resolve_patch_target (method, domain, code,
3970                                                     patch_info, run_cctors);
3971
3972                 switch (patch_info->type) {
3973                         case MONO_PATCH_INFO_IP:
3974                         case MONO_PATCH_INFO_EXC_NAME:
3975                         case MONO_PATCH_INFO_LDSTR:
3976                         case MONO_PATCH_INFO_TYPE_FROM_HANDLE:
3977                         case MONO_PATCH_INFO_LDTOKEN:
3978                         case MONO_PATCH_INFO_EXC:
3979                                 continue;
3980                         case MONO_PATCH_INFO_SWITCH:
3981                                 /*----------------------------------*/
3982                                 /* ip points at the basr r13,0/j +4 */
3983                                 /* instruction the vtable value     */
3984                                 /* follows this (i.e. ip+6)         */
3985                                 /*----------------------------------*/
3986                                 *((gconstpointer *)(ip+6)) = target;
3987                                 target = NULL;
3988                                 continue;
3989                         case MONO_PATCH_INFO_METHODCONST:
3990                         case MONO_PATCH_INFO_CLASS:
3991                         case MONO_PATCH_INFO_IMAGE:
3992                         case MONO_PATCH_INFO_FIELD:
3993                         case MONO_PATCH_INFO_IID:
3994                                 target = S390_RELATIVE(target, ip);
3995                                 continue;
3996                         case MONO_PATCH_INFO_R4:
3997                         case MONO_PATCH_INFO_R8:
3998                         case MONO_PATCH_INFO_METHOD_REL:
3999                                 g_assert_not_reached ();
4000                                 continue;
4001                         default:
4002                                 target = S390_RELATIVE(target, ip);
4003                                 ip += 2;
4004                 }
4005                 s390_patch (ip, (guint32) target);
4006         }
4007 }
4008
4009 /*========================= End of Function ========================*/
4010
4011 /*------------------------------------------------------------------*/
4012 /*                                                                  */
4013 /* Name         - emit_load_volatile_registers                      */
4014 /*                                                                  */
4015 /* Function     - Create the instruction sequence for loading the   */
4016 /*                parameter registers for use with the 'tail' op.   */
4017 /*                                                                  */
4018 /*                The register loading operations performed here    */
4019 /*                are the mirror of the store operations performed  */
4020 /*                in mono_arch_emit_prolog and need to be kept in   */
4021 /*                synchronization with it.                          */
4022 /*                                                                  */
4023 /*------------------------------------------------------------------*/
4024
4025 guint8 *
4026 emit_load_volatile_registers (guint8 * code, MonoCompile *cfg)
4027 {
4028         MonoMethod *method = cfg->method;
4029         MonoMethodSignature *sig;
4030         MonoInst *inst;
4031         int pos, i;
4032         CallInfo *cinfo;
4033
4034         sig = mono_method_signature (method);
4035         pos = 0;
4036
4037         cinfo = get_call_info (cfg, cfg->mempool, sig, sig->pinvoke);
4038
4039         if (cinfo->struct_ret) {
4040                 ArgInfo *ainfo = &cinfo->ret;
4041                 inst         = cfg->vret_addr;
4042                 s390_l (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4043         }
4044
4045         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
4046                 ArgInfo *ainfo = cinfo->args + i;
4047                 inst = cfg->args [pos];
4048
4049                 if (inst->opcode == OP_REGVAR) {
4050                         if (ainfo->regtype == RegTypeGeneral)
4051                                 s390_lr (code, ainfo->reg, inst->dreg);
4052                         else if (ainfo->regtype == RegTypeFP) {
4053                                 if (inst->dreg != ainfo->reg) {
4054                                         if (ainfo->size == 4) {
4055                                                 s390_ldebr (code, ainfo->reg, inst->dreg);
4056                                         } else {
4057                                                 s390_ldr   (code, ainfo->reg, inst->dreg);
4058                                         }
4059                                 }
4060                         }
4061                         else if (ainfo->regtype == RegTypeBase) {
4062                         } else
4063                                 g_assert_not_reached ();
4064                 } else {
4065                         if (ainfo->regtype == RegTypeGeneral) {
4066                                 if (!((ainfo->reg >= 2) && (ainfo->reg <= 6)))
4067                                         g_assert_not_reached();
4068                                 switch (ainfo->size) {
4069                                 case 1:
4070                                         s390_ic (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4071                                         break;
4072                                 case 2:
4073                                         s390_lh (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4074                                         break;
4075                                 case 8:
4076                                         s390_lm (code, ainfo->reg, ainfo->reg + 1,
4077                                                   inst->inst_basereg, inst->inst_offset);
4078                                         break;
4079                                 default:
4080                                         s390_l  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4081                                 }
4082                         } else if (ainfo->regtype == RegTypeBase) {
4083                         } else if (ainfo->regtype == RegTypeFP) {
4084                                 if (ainfo->size == 8)
4085                                         s390_ld (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4086                                 else if (ainfo->size == 4)
4087                                         s390_le (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4088                                 else
4089                                         g_assert_not_reached ();
4090                         } else if (ainfo->regtype == RegTypeStructByVal) {
4091                                 if (ainfo->reg != STK_BASE) {
4092                                         switch (ainfo->size) {
4093                                         case 1:
4094                                                 s390_ic (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4095                                                 break;
4096                                         case 2:
4097                                                 s390_lh (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4098                                                 break;
4099                                         case 4:
4100                                                 s390_l  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4101                                                 break;
4102                                         case 8:
4103                                                 s390_lm (code, ainfo->reg, ainfo->reg+1, inst->inst_basereg, inst->inst_offset);
4104                                                 break;
4105                                         }
4106                                 }
4107                         } else if (ainfo->regtype == RegTypeStructByAddr) {
4108                                 if (ainfo->reg != STK_BASE) {
4109                                         s390_l  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4110                                 }
4111                         } else
4112                                 g_assert_not_reached ();
4113                 }
4114                 pos++;
4115         }
4116
4117         return code;
4118 }
4119
4120 /*========================= End of Function ========================*/
4121
4122 /*------------------------------------------------------------------*/
4123 /*                                                                  */
4124 /* Name         - mono_arch_emit_prolog                             */
4125 /*                                                                  */
4126 /* Function     - Create the instruction sequence for a function    */
4127 /*                prolog.                                           */
4128 /*                                                                  */
4129 /*------------------------------------------------------------------*/
4130
4131 guint8 *
4132 mono_arch_emit_prolog (MonoCompile *cfg)
4133 {
4134         MonoMethod *method = cfg->method;
4135         MonoBasicBlock *bb;
4136         MonoMethodSignature *sig;
4137         MonoInst *inst;
4138         int alloc_size, pos, max_offset, i;
4139         guint8 *code;
4140         CallInfo *cinfo;
4141         int tracing = 0;
4142         int lmfOffset;                                                          \
4143
4144         if (mono_jit_trace_calls != NULL && mono_trace_eval (method))
4145                 tracing = 1;
4146
4147         cfg->code_size   = 512;
4148         cfg->native_code = code = g_malloc (cfg->code_size);
4149
4150         s390_stm  (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
4151
4152         if (cfg->flags & MONO_CFG_HAS_ALLOCA) {
4153                 cfg->used_int_regs |= 1 << 11;
4154         }
4155
4156         alloc_size = cfg->stack_offset;
4157
4158         cfg->stack_usage = alloc_size;
4159         s390_lr   (code, s390_r11, STK_BASE);
4160         if (s390_is_uimm16 (alloc_size)) {
4161                 s390_ahi  (code, STK_BASE, -alloc_size);
4162         } else {
4163                 int stackSize = alloc_size;
4164                 while (stackSize > 32767) {
4165                         s390_ahi  (code, STK_BASE, -32767);
4166                         stackSize -= 32767;
4167                 }
4168                 s390_ahi  (code, STK_BASE, -stackSize);
4169         }
4170         s390_st   (code, s390_r11, 0, STK_BASE, 0);
4171
4172         if (cfg->frame_reg != STK_BASE)
4173                 s390_lr (code, s390_r11, STK_BASE);
4174
4175         /* compute max_offset in order to use short forward jumps
4176          * we always do it on s390 because the immediate displacement
4177          * for jumps is too small
4178          */
4179         max_offset = 0;
4180         for (bb = cfg->bb_entry; bb; bb = bb->next_bb) {
4181                 MonoInst *ins;
4182                 bb->max_offset = max_offset;
4183
4184                 if (cfg->prof_options & MONO_PROFILE_COVERAGE)
4185                         max_offset += 6;
4186
4187                 MONO_BB_FOR_EACH_INS (bb, ins)
4188                         max_offset += ((guint8 *)ins_get_spec (ins->opcode))[MONO_INST_LEN];
4189         }
4190
4191         /* load arguments allocated to register from the stack */
4192         sig = mono_method_signature (method);
4193         pos = 0;
4194
4195         cinfo = get_call_info (cfg, cfg->mempool, sig, sig->pinvoke);
4196
4197         if (cinfo->struct_ret) {
4198                 ArgInfo *ainfo = &cinfo->ret;
4199                 inst         = cfg->vret_addr;
4200                 inst->backend.size = ainfo->vtsize;
4201                 s390_st (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4202         }
4203
4204         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
4205                 ArgInfo *ainfo = cinfo->args + i;
4206                 inst = cfg->args [pos];
4207
4208                 if (inst->opcode == OP_REGVAR) {
4209                         if (ainfo->regtype == RegTypeGeneral)
4210                                 s390_lr (code, inst->dreg, ainfo->reg);
4211                         else if (ainfo->regtype == RegTypeFP) {
4212                                 if (inst->dreg != ainfo->reg) {
4213                                         if (ainfo->size == 4) {
4214                                                 s390_ledbr (code, inst->dreg, ainfo->reg);
4215                                         } else {
4216                                                 s390_ldr   (code, inst->dreg, ainfo->reg);
4217                                         }
4218                                 }
4219                         }
4220                         else if (ainfo->regtype == RegTypeBase) {
4221                                 s390_lr  (code, s390_r13, STK_BASE);
4222                                 s390_ahi (code, s390_r13, alloc_size);
4223                                 s390_l   (code, inst->dreg, 0, s390_r13, ainfo->offset);
4224                         } else
4225                                 g_assert_not_reached ();
4226
4227                         if (cfg->verbose_level > 2)
4228                                 g_print ("Argument %d assigned to register %s\n",
4229                                          pos, mono_arch_regname (inst->dreg));
4230                 } else {
4231                         if (ainfo->regtype == RegTypeGeneral) {
4232                                 if (!((ainfo->reg >= 2) && (ainfo->reg <= 6)))
4233                                         g_assert_not_reached();
4234                                 switch (ainfo->size) {
4235                                 case 1:
4236                                         s390_stc (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4237                                         break;
4238                                 case 2:
4239                                         s390_sth (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4240                                         break;
4241                                 case 8:
4242                                         s390_stm (code, ainfo->reg, ainfo->reg + 1,
4243                                                   inst->inst_basereg, inst->inst_offset);
4244                                         break;
4245                                 default:
4246                                         s390_st  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4247                                 }
4248                         } else if (ainfo->regtype == RegTypeBase) {
4249                         } else if (ainfo->regtype == RegTypeFP) {
4250                                 if (ainfo->size == 8)
4251                                         s390_std (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4252                                 else if (ainfo->size == 4)
4253                                         s390_ste (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4254                                 else
4255                                         g_assert_not_reached ();
4256                         } else if (ainfo->regtype == RegTypeStructByVal) {
4257                                 int doffset = inst->inst_offset;
4258                                 int reg;
4259                                 if (ainfo->reg != STK_BASE)
4260                                         reg = ainfo->reg;
4261                                 else {
4262                                         reg = s390_r0;
4263                                         s390_lr  (code, s390_r13, STK_BASE);
4264                                         s390_ahi (code, s390_r13, alloc_size);
4265                                 }
4266                                 switch (ainfo->size) {
4267                                         case 1:
4268                                                 if (ainfo->reg == STK_BASE)
4269                                                         s390_ic  (code, reg, 0, s390_r13, ainfo->offset+3);
4270                                                 s390_stc (code, reg, 0, inst->inst_basereg, doffset);
4271                                                 break;
4272                                         case 2:
4273                                                 if (ainfo->reg == STK_BASE)
4274                                                         s390_lh  (code, reg, 0, s390_r13, ainfo->offset+2);
4275                                                 s390_sth (code, reg, 0, inst->inst_basereg, doffset);
4276                                                 break;
4277                                         case 4:
4278                                                 if (ainfo->reg == STK_BASE)
4279                                                         s390_l   (code, reg, 0, s390_r13, ainfo->offset);
4280                                                 s390_st  (code, reg, 0, inst->inst_basereg, doffset);
4281                                                 break;
4282                                         case 8:
4283                                                 if (ainfo->reg == STK_BASE)
4284                                                         s390_lm  (code, s390_r0, s390_r1, s390_r13, ainfo->offset);
4285                                                 s390_stm (code, reg, reg+1, inst->inst_basereg, doffset);
4286                                                 break;
4287                                 }
4288                         } else if (ainfo->regtype == RegTypeStructByAddr) {
4289                                 if (ainfo->reg != STK_BASE)
4290                                         s390_st  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4291                         } else
4292                                 g_assert_not_reached ();
4293                 }
4294                 pos++;
4295         }
4296
4297         if (method->save_lmf) {
4298                 /*---------------------------------------------------------------*/
4299                 /* we build the MonoLMF structure on the stack - see mini-s390.h */
4300                 /*---------------------------------------------------------------*/
4301                 lmfOffset = alloc_size - sizeof(MonoLMF);
4302
4303                 s390_lr    (code, s390_r13, cfg->frame_reg);
4304                 if (s390_is_uimm16(lmfOffset))
4305                         s390_ahi   (code, s390_r13, lmfOffset);
4306                 else {
4307                         s390_basr (code, s390_r14, 0);
4308                         s390_j    (code, 4);
4309                         s390_word (code, lmfOffset);
4310                         s390_a    (code, s390_r13, 0, s390_r14, 4);
4311                 }
4312
4313                 /*---------------------------------------------------------------*/
4314                 /* Preserve the parameter registers while we fix up the lmf      */
4315                 /*---------------------------------------------------------------*/
4316                 s390_stm   (code, s390_r2, s390_r6, s390_r13,
4317                             G_STRUCT_OFFSET(MonoLMF, pregs[0]));
4318
4319                 /*---------------------------------------------------------------*/
4320                 /* On return from this call r2 have the address of the &lmf      */
4321                 /*---------------------------------------------------------------*/
4322                 mono_add_patch_info (cfg, code - cfg->native_code,
4323                                      MONO_PATCH_INFO_INTERNAL_METHOD,
4324                                      (gpointer)"mono_get_lmf_addr");
4325                 s390_brasl (code, s390_r14, 0);
4326
4327                 /*---------------------------------------------------------------*/
4328                 /* Set lmf.lmf_addr = jit_tls->lmf                               */
4329                 /*---------------------------------------------------------------*/
4330                 s390_st    (code, s390_r2, 0, s390_r13,
4331                             G_STRUCT_OFFSET(MonoLMF, lmf_addr));
4332
4333                 /*---------------------------------------------------------------*/
4334                 /* Get current lmf                                               */
4335                 /*---------------------------------------------------------------*/
4336                 s390_l     (code, s390_r0, 0, s390_r2, 0);
4337
4338                 /*---------------------------------------------------------------*/
4339                 /* Set our lmf as the current lmf                                */
4340                 /*---------------------------------------------------------------*/
4341                 s390_st    (code, s390_r13, 0, s390_r2, 0);
4342
4343                 /*---------------------------------------------------------------*/
4344                 /* Have our lmf.previous_lmf point to the last lmf               */
4345                 /*---------------------------------------------------------------*/
4346                 s390_st    (code, s390_r0, 0, s390_r13,
4347                             G_STRUCT_OFFSET(MonoLMF, previous_lmf));
4348
4349                 /*---------------------------------------------------------------*/
4350                 /* save method info                                              */
4351                 /*---------------------------------------------------------------*/
4352                 s390_basr  (code, s390_r1, 0);
4353                 s390_j     (code, 4);
4354                 s390_word  (code, method);
4355                 s390_l     (code, s390_r1, 0, s390_r1, 4);
4356                 s390_st    (code, s390_r1, 0, s390_r13,
4357                             G_STRUCT_OFFSET(MonoLMF, method));
4358
4359                 /*---------------------------------------------------------------*/
4360                 /* save the current IP                                           */
4361                 /*---------------------------------------------------------------*/
4362                 s390_st    (code, STK_BASE, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, ebp));
4363                 s390_basr  (code, s390_r1, 0);
4364                 s390_la    (code, s390_r1, 0, s390_r1, 0);
4365                 s390_st    (code, s390_r1, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, eip));
4366
4367                 /*---------------------------------------------------------------*/
4368                 /* Save general and floating point registers                     */
4369                 /*---------------------------------------------------------------*/
4370                 s390_stm   (code, s390_r2, s390_r12, s390_r13,
4371                             G_STRUCT_OFFSET(MonoLMF, gregs[2]));
4372                 for (i = 0; i < 16; i++) {
4373                         s390_std  (code, i, 0, s390_r13,
4374                                    G_STRUCT_OFFSET(MonoLMF, fregs[i]));
4375                 }
4376
4377                 /*---------------------------------------------------------------*/
4378                 /* Restore the parameter registers now that we've set up the lmf */
4379                 /*---------------------------------------------------------------*/
4380                 s390_lm    (code, s390_r2, s390_r6, s390_r13,
4381                             G_STRUCT_OFFSET(MonoLMF, pregs[0]));
4382         }
4383
4384         if (tracing)
4385                 code = mono_arch_instrument_prolog(cfg, enter_method, code, TRUE);
4386
4387         cfg->code_len = code - cfg->native_code;
4388
4389         return code;
4390 }
4391
4392 /*========================= End of Function ========================*/
4393
4394 /*------------------------------------------------------------------*/
4395 /*                                                                  */
4396 /* Name         - mono_arch_emit_epilog                             */
4397 /*                                                                  */
4398 /* Function     - Emit the instructions for a function epilog.      */
4399 /*                                                                  */
4400 /*------------------------------------------------------------------*/
4401
4402 void
4403 mono_arch_emit_epilog (MonoCompile *cfg)
4404 {
4405         MonoMethod *method = cfg->method;
4406         int tracing = 0;
4407         guint8 *code;
4408         int max_epilog_size = 96;
4409
4410         if (cfg->method->save_lmf)
4411                 max_epilog_size += 128;
4412
4413         if (mono_jit_trace_calls != NULL)
4414                 max_epilog_size += 128;
4415
4416         if (cfg->prof_options & MONO_PROFILE_ENTER_LEAVE)
4417                 max_epilog_size += 128;
4418
4419         while ((cfg->code_len + max_epilog_size) > (cfg->code_size - 16)) {
4420                 cfg->code_size  *= 2;
4421                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
4422                 mono_jit_stats.code_reallocs++;
4423         }
4424
4425         code = cfg->native_code + cfg->code_len;
4426
4427         if (mono_jit_trace_calls != NULL && mono_trace_eval (method)) {
4428                 code = mono_arch_instrument_epilog (cfg, leave_method, code, TRUE);
4429                 tracing = 1;
4430         }
4431
4432         if (method->save_lmf)
4433                 restoreLMF(code, cfg->frame_reg, cfg->stack_usage);
4434
4435         if (cfg->flags & MONO_CFG_HAS_ALLOCA)
4436                 s390_l (code, STK_BASE, 0, STK_BASE, 0);
4437         else
4438                 code = backUpStackPtr(cfg, code, STK_BASE);
4439
4440         s390_lm  (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
4441         s390_br  (code, s390_r14);
4442
4443         cfg->code_len = code - cfg->native_code;
4444
4445         g_assert (cfg->code_len < cfg->code_size);
4446
4447 }
4448
4449 /*========================= End of Function ========================*/
4450
4451 /*------------------------------------------------------------------*/
4452 /*                                                                  */
4453 /* Name         - mono_arch_emit_exceptions                         */
4454 /*                                                                  */
4455 /* Function     - Emit the blocks to handle exception conditions.   */
4456 /*                                                                  */
4457 /*------------------------------------------------------------------*/
4458
4459 void
4460 mono_arch_emit_exceptions (MonoCompile *cfg)
4461 {
4462         MonoJumpInfo    *patch_info;
4463         guint8          *code;
4464         int             nThrows = 0,
4465                         exc_count = 0,
4466                         iExc;
4467         guint32         code_size;
4468         MonoClass       *exc_classes [MAX_EXC];
4469         guint8          *exc_throw_start [MAX_EXC];
4470
4471         for (patch_info = cfg->patch_info;
4472              patch_info;
4473              patch_info = patch_info->next) {
4474                 if (patch_info->type == MONO_PATCH_INFO_EXC)
4475                         exc_count++;
4476         }
4477
4478         code_size = exc_count * 26;
4479
4480         while ((cfg->code_len + code_size) > (cfg->code_size - 16)) {
4481                 cfg->code_size  *= 2;
4482                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
4483                 mono_jit_stats.code_reallocs++;
4484         }
4485
4486         code = cfg->native_code + cfg->code_len;
4487
4488         /*---------------------------------------------------------------------*/
4489         /* Add code to raise exceptions                                        */
4490         /*---------------------------------------------------------------------*/
4491         for (patch_info = cfg->patch_info; patch_info; patch_info = patch_info->next) {
4492                 switch (patch_info->type) {
4493                 case MONO_PATCH_INFO_EXC: {
4494                         guint8 *ip = patch_info->ip.i + cfg->native_code;
4495                         MonoClass *exc_class;
4496                         guint32 throw_ip;
4497
4498                         /*-----------------------------------------------------*/
4499                         /* Patch the branch in epilog to come here             */
4500                         /*-----------------------------------------------------*/
4501                         s390_patch (ip + 2, (guint32) (S390_RELATIVE(code,ip)));
4502
4503                         exc_class = mono_class_from_name (mono_defaults.corlib,
4504                                                           "System",
4505                                                           patch_info->data.name);
4506                         g_assert (exc_class);
4507                         throw_ip = patch_info->ip.i;
4508
4509                         for (iExc = 0; iExc < nThrows; ++iExc)
4510                                 if (exc_classes [iExc] == exc_class)
4511                                         break;
4512
4513                         if (iExc < nThrows) {
4514                                 s390_jcl (code, S390_CC_UN, (guint32) exc_throw_start [iExc]);
4515                                 patch_info->type = MONO_PATCH_INFO_NONE;
4516                         } else {
4517
4518                                 if (nThrows < MAX_EXC) {
4519                                         exc_classes [nThrows]     = exc_class;
4520                                         exc_throw_start [nThrows] = code;
4521                                 }
4522
4523                                 /*---------------------------------------------*/
4524                                 /* Patch the parameter passed to the handler   */
4525                                 /*---------------------------------------------*/
4526                                 s390_basr (code, s390_r13, 0);
4527                                 s390_j    (code, 4);
4528                                 s390_word (code, patch_info->data.target);
4529                                 /*---------------------------------------------*/
4530                                 /* Load return address & parameter register    */
4531                                 /*---------------------------------------------*/
4532                                 s390_larl (code, s390_r14, (gsize)S390_RELATIVE((patch_info->ip.i +
4533                                                            cfg->native_code + 8), code));
4534                                 s390_l    (code, s390_r2, 0, s390_r13, 4);
4535                                 /*---------------------------------------------*/
4536                                 /* Reuse the current patch to set the jump     */
4537                                 /*---------------------------------------------*/
4538                                 patch_info->type      = MONO_PATCH_INFO_INTERNAL_METHOD;
4539                                 patch_info->data.name = "mono_arch_throw_exception_by_name";
4540                                 patch_info->ip.i      = code - cfg->native_code;
4541                                 s390_jcl  (code, S390_CC_UN, 0);
4542                         }
4543                         break;
4544                 }
4545                 default:
4546                         /* do nothing */
4547                         break;
4548                 }
4549         }
4550
4551         cfg->code_len = code - cfg->native_code;
4552
4553         g_assert (cfg->code_len < cfg->code_size);
4554
4555 }
4556
4557 /*========================= End of Function ========================*/
4558
4559 /*------------------------------------------------------------------*/
4560 /*                                                                  */
4561 /* Name         - mono_arch_setup_jit_tls_data                      */
4562 /*                                                                  */
4563 /* Function     - Setup the JIT's Thread Level Specific Data.       */
4564 /*                                                                  */
4565 /*------------------------------------------------------------------*/
4566
4567 void
4568 mono_arch_setup_jit_tls_data (MonoJitTlsData *tls)
4569 {
4570
4571         if (!tls_offset_inited) {
4572                 tls_offset_inited = TRUE;
4573
4574 #if HAVE_KW_THREAD
4575 # if 0
4576         __asm__ ("\tear\t%r1,0\n"
4577                  "\tlr\t%0,%3\n"
4578                  "\tsr\t%0,%r1\n"
4579                  "\tlr\t%1,%4\n"
4580                  "\tsr\t%1,%r1\n"
4581                  "\tlr\t%2,%5\n"
4582                  "\tsr\t%2,%r1\n"
4583                  : "=r" (appdomain_tls_offset),
4584                    "=r" (thread_tls_offset),
4585                    "=r" (lmf_tls_offset)
4586                  : "r" (&tls_appdomain),
4587                    "r" (&tls_current_object),
4588                    "r" (&mono_lmf_addr)
4589                  : "1", "cc");
4590 # endif
4591 #endif
4592         }
4593
4594         if (!lmf_addr_key_inited) {
4595                 lmf_addr_key_inited = TRUE;
4596                 pthread_key_create (&lmf_addr_key, NULL);
4597         }
4598         pthread_setspecific (lmf_addr_key, &tls->lmf);
4599
4600 }
4601
4602 /*========================= End of Function ========================*/
4603
4604 /*------------------------------------------------------------------*/
4605 /*                                                                  */
4606 /* Name         - mono_arch_free_jit_tls_data                       */
4607 /*                                                                  */
4608 /* Function     - Free tls data.                                    */
4609 /*                                                                  */
4610 /*------------------------------------------------------------------*/
4611
4612 void
4613 mono_arch_free_jit_tls_data (MonoJitTlsData *tls)
4614 {
4615
4616 }
4617
4618 /*========================= End of Function ========================*/
4619
4620 /*------------------------------------------------------------------*/
4621 /*                                                                  */
4622 /* Name         - mono_arch_emit_this_vret_args                     */
4623 /*                                                                  */
4624 /* Function     -                                                   */
4625 /*                                                                  */
4626 /*------------------------------------------------------------------*/
4627
4628 void
4629 mono_arch_emit_this_vret_args (MonoCompile *cfg, MonoCallInst *inst, int this_reg, int this_type, int vt_reg)
4630 {
4631         int this_dreg = s390_r2;
4632
4633         if (vt_reg != -1)
4634                 this_dreg = s390_r3;
4635
4636         /* add the this argument */
4637         if (this_reg != -1) {
4638                 MonoInst *this;
4639                 MONO_INST_NEW (cfg, this, OP_MOVE);
4640                 this->type  = this_type;
4641                 this->sreg1 = this_reg;
4642                 this->dreg  = mono_regstate_next_int (cfg->rs);
4643                 mono_bblock_add_inst (cfg->cbb, this);
4644                 mono_call_inst_add_outarg_reg (cfg, inst, this->dreg, this_dreg, FALSE);
4645         }
4646
4647         if (vt_reg != -1) {
4648                 MonoInst *vtarg;
4649                 MONO_INST_NEW (cfg, vtarg, OP_MOVE);
4650                 vtarg->type  = STACK_MP;
4651                 vtarg->sreg1 = vt_reg;
4652                 vtarg->dreg  = mono_regstate_next_int (cfg->rs);
4653                 mono_bblock_add_inst (cfg->cbb, vtarg);
4654                 mono_call_inst_add_outarg_reg (cfg, inst, vtarg->dreg, s390_r2, FALSE);
4655         }
4656 }
4657
4658 /*========================= End of Function ========================*/
4659
4660 /*------------------------------------------------------------------*/
4661 /*                                                                  */
4662 /* Name         - mono_arch_get_inst_for_method                   */
4663 /*                                                                  */
4664 /* Function     - Check for opcodes we can handle directly in       */
4665 /*                hardware.                                         */
4666 /*                                                                  */
4667 /*------------------------------------------------------------------*/
4668
4669 MonoInst*
4670 mono_arch_get_inst_for_method (MonoCompile *cfg, MonoMethod *cmethod,
4671                                MonoMethodSignature *fsig, MonoInst **args)
4672 {
4673         MonoInst *ins = NULL;
4674
4675         if (cmethod->klass == mono_defaults.math_class) {
4676                 if (strcmp (cmethod->name, "Sqrt") == 0) {
4677                         MONO_INST_NEW (cfg, ins, OP_SQRT);
4678                         ins->inst_i0 = args [0];
4679                 }
4680         }
4681
4682         return ins;
4683 }
4684
4685 /*========================= End of Function ========================*/
4686
4687 /*------------------------------------------------------------------*/
4688 /*                                                                  */
4689 /* Name         - mono_arch_print_tree                              */
4690 /*                                                                  */
4691 /* Function     - Print platform-specific opcode details.           */
4692 /*                                                                  */
4693 /* Returns      - 1 - opcode details have been printed              */
4694 /*                0 - opcode details have not been printed          */
4695 /*                                                                  */
4696 /*------------------------------------------------------------------*/
4697
4698 gboolean
4699 mono_arch_print_tree (MonoInst *tree, int arity)
4700 {
4701         gboolean done;
4702
4703         switch (tree->opcode) {
4704                 case OP_S390_LOADARG:
4705                 case OP_S390_ARGREG:
4706                 case OP_S390_ARGPTR:
4707                         printf ("[0x%lx(%s)]", tree->inst_offset,
4708                                 mono_arch_regname (tree->inst_basereg));
4709                         done = 1;
4710                         break;
4711                 case OP_S390_STKARG:
4712                         printf ("[0x%lx(previous_frame)]",
4713                                 tree->inst_offset);
4714                         done = 1;
4715                         break;
4716                 case OP_S390_MOVE:
4717                         printf ("[0x%lx(%d,%s),0x%lx(%s)]",
4718                                 tree->inst_offset, tree->backend.size,
4719                                 mono_arch_regname(tree->dreg), tree->inst_imm,
4720                                 mono_arch_regname(tree->sreg1));
4721                         done = 1;
4722                         break;
4723                 case OP_S390_SETF4RET:
4724                         printf ("[%s,%s]",
4725                                 mono_arch_fregname (tree->dreg),
4726                                 mono_arch_fregname (tree->sreg1));
4727                         done = 1;
4728                         break;
4729                 case OP_TLS_GET:
4730                         printf ("[0x%lx(0x%lx,%s)]", tree->inst_offset,
4731                                 tree->inst_imm,
4732                                 mono_arch_regname (tree->sreg1));
4733                         done = 1;
4734                         break;
4735                 case OP_S390_BKCHAIN:
4736                         printf ("[previous_frame(%s)]",
4737                                 mono_arch_regname (tree->sreg1));
4738                         done = 1;
4739                         break;
4740                 default:
4741                         done = 0;
4742         }
4743         return (done);
4744 }
4745
4746 /*========================= End of Function ========================*/
4747
4748 /*------------------------------------------------------------------*/
4749 /*                                                                  */
4750 /* Name         - mono_arch_regalloc_cost                           */
4751 /*                                                                  */
4752 /* Function     - Determine the cost, in the number of memory       */
4753 /*                references, of the action of allocating the var-  */
4754 /*                iable VMV into a register during global register  */
4755 /*                allocation.                                       */
4756 /*                                                                  */
4757 /* Returns      - Cost                                              */
4758 /*                                                                  */
4759 /*------------------------------------------------------------------*/
4760
4761 guint32
4762 mono_arch_regalloc_cost (MonoCompile *cfg, MonoMethodVar *vmv)
4763 {
4764         /* FIXME: */
4765         return 2;
4766 }
4767
4768 /*========================= End of Function ========================*/
4769
4770 /*------------------------------------------------------------------*/
4771 /*                                                                  */
4772 /* Name         - mono_arch_get_domain_intrinsic                    */
4773 /*                                                                  */
4774 /* Function     -                                                   */
4775 /*                                                                  */
4776 /* Returns      -                                                   */
4777 /*                                                                  */
4778 /*------------------------------------------------------------------*/
4779
4780 MonoInst *
4781 mono_arch_get_domain_intrinsic (MonoCompile* cfg)
4782 {
4783         MonoInst *ins;
4784
4785         if (appdomain_tls_offset == -1)
4786                 return NULL;
4787
4788         MONO_INST_NEW (cfg, ins, OP_TLS_GET);
4789         ins->inst_offset = appdomain_tls_offset;
4790         return (ins);
4791 }
4792
4793 /*========================= End of Function ========================*/
4794
4795 /*------------------------------------------------------------------*/
4796 /*                                                                  */
4797 /* Name         - mono_arch_get_thread_intrinsic                    */
4798 /*                                                                  */
4799 /* Function     -                                                   */
4800 /*                                                                  */
4801 /* Returns      -                                                   */
4802 /*                                                                  */
4803 /*------------------------------------------------------------------*/
4804
4805 MonoInst *
4806 mono_arch_get_thread_intrinsic (MonoCompile* cfg)
4807 {
4808         MonoInst *ins;
4809
4810         if (thread_tls_offset == -1)
4811                 return NULL;
4812
4813         MONO_INST_NEW (cfg, ins, OP_TLS_GET);
4814         ins->inst_offset = thread_tls_offset;
4815         return (ins);
4816 }
4817
4818 /*========================= End of Function ========================*/
4819
4820 /*------------------------------------------------------------------*/
4821 /*                                                                  */
4822 /* Name         - mono_arch_flush_register_windows                  */
4823 /*                                                                  */
4824 /* Function     -                                                   */
4825 /*                                                                  */
4826 /* Returns      -                                                   */
4827 /*                                                                  */
4828 /*------------------------------------------------------------------*/
4829
4830 void
4831 mono_arch_flush_register_windows (void)
4832 {
4833 }
4834
4835 /*========================= End of Function ========================*/
4836
4837 /*------------------------------------------------------------------*/
4838 /*                                                                  */
4839 /* Name         - mono_arch_get_lmf_addr                            */
4840 /*                                                                  */
4841 /* Function     -                                                   */
4842 /*                                                                  */
4843 /* Returns      -                                                   */
4844 /*                                                                  */
4845 /*------------------------------------------------------------------*/
4846
4847 gpointer
4848 mono_arch_get_lmf_addr (void)
4849 {
4850         return pthread_getspecific (lmf_addr_key);
4851 }
4852
4853
4854 /*========================= End of Function ========================*/
4855
4856 /*------------------------------------------------------------------*/
4857 /*                                                                  */
4858 /* Name         - mono_arch_get_patch_offset                        */
4859 /*                                                                  */
4860 /* Function     - Dummy entry point until s390x supports aot.       */
4861 /*                                                                  */
4862 /* Returns      - Offset for patch.                                 */
4863 /*                                                                  */
4864 /*------------------------------------------------------------------*/
4865
4866 guint32
4867 mono_arch_get_patch_offset (guint8 *code)
4868 {
4869         return 0;
4870 }
4871
4872 /*========================= End of Function ========================*/
4873
4874 gpointer
4875 mono_arch_context_get_int_reg (MonoContext *ctx, int reg)
4876 {
4877         /* FIXME: implement */
4878         g_assert_not_reached ();
4879         return NULL;
4880 }