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                 MonoInst *last_ins = mono_inst_list_prev (&ins->node, &bb->ins_list);
2242                 switch (ins->opcode) {
2243                 case OP_MUL_IMM:
2244                         /* remove unnecessary multiplication with 1 */
2245                         if (ins->inst_imm == 1) {
2246                                 if (ins->dreg != ins->sreg1) {
2247                                         ins->opcode = OP_MOVE;
2248                                 } else {
2249                                         MONO_DELETE_INS (bb, ins);
2250                                         continue;
2251                                 }
2252                         }
2253                         break;
2254                 case OP_LOAD_MEMBASE:
2255                 case OP_LOADI4_MEMBASE:
2256                         /*
2257                          * OP_STORE_MEMBASE_REG reg, offset(basereg)
2258                          * OP_LOAD_MEMBASE offset(basereg), reg
2259                          */
2260                         if (last_ins && (last_ins->opcode == OP_STOREI4_MEMBASE_REG
2261                                          || last_ins->opcode == OP_STORE_MEMBASE_REG) &&
2262                             ins->inst_basereg == last_ins->inst_destbasereg &&
2263                             ins->inst_offset == last_ins->inst_offset) {
2264                                 if (ins->dreg == last_ins->sreg1) {
2265                                         MONO_DELETE_INS (bb, ins);
2266                                         continue;
2267                                 } else {
2268                                         ins->opcode = OP_MOVE;
2269                                         ins->sreg1 = last_ins->sreg1;
2270                                 }
2271
2272                         /*
2273                          * Note: reg1 must be different from the basereg in the second load
2274                          * OP_LOAD_MEMBASE offset(basereg), reg1
2275                          * OP_LOAD_MEMBASE offset(basereg), reg2
2276                          * -->
2277                          * OP_LOAD_MEMBASE offset(basereg), reg1
2278                          * OP_MOVE reg1, reg2
2279                          */
2280                         } if (last_ins && (last_ins->opcode == OP_LOADI4_MEMBASE
2281                                            || last_ins->opcode == OP_LOAD_MEMBASE) &&
2282                               ins->inst_basereg != last_ins->dreg &&
2283                               ins->inst_basereg == last_ins->inst_basereg &&
2284                               ins->inst_offset == last_ins->inst_offset) {
2285
2286                                 if (ins->dreg == last_ins->dreg) {
2287                                         MONO_DELETE_INS (bb, ins);
2288                                         continue;
2289                                 } else {
2290                                         ins->opcode = OP_MOVE;
2291                                         ins->sreg1 = last_ins->dreg;
2292                                 }
2293
2294                                 //g_assert_not_reached ();
2295
2296 #if 0
2297                         /*
2298                          * OP_STORE_MEMBASE_IMM imm, offset(basereg)
2299                          * OP_LOAD_MEMBASE offset(basereg), reg
2300                          * -->
2301                          * OP_STORE_MEMBASE_IMM imm, offset(basereg)
2302                          * OP_ICONST reg, imm
2303                          */
2304                         } else if (last_ins && (last_ins->opcode == OP_STOREI4_MEMBASE_IMM
2305                                                 || last_ins->opcode == OP_STORE_MEMBASE_IMM) &&
2306                                    ins->inst_basereg == last_ins->inst_destbasereg &&
2307                                    ins->inst_offset == last_ins->inst_offset) {
2308                                 //static int c = 0; printf ("MATCHX %s %d\n", cfg->method->name,c++);
2309                                 ins->opcode = OP_ICONST;
2310                                 ins->inst_c0 = last_ins->inst_imm;
2311                                 g_assert_not_reached (); // check this rule
2312 #endif
2313                         }
2314                         break;
2315                 case OP_LOADU1_MEMBASE:
2316                 case OP_LOADI1_MEMBASE:
2317                         if (last_ins && (last_ins->opcode == OP_STOREI1_MEMBASE_REG) &&
2318                                         ins->inst_basereg == last_ins->inst_destbasereg &&
2319                                         ins->inst_offset == last_ins->inst_offset) {
2320                                 ins->opcode = (ins->opcode == OP_LOADI1_MEMBASE) ? OP_ICONV_TO_I1 : OP_ICONV_TO_U1;
2321                                 ins->sreg1 = last_ins->sreg1;
2322                         }
2323                         break;
2324                 case OP_LOADU2_MEMBASE:
2325                 case OP_LOADI2_MEMBASE:
2326                         if (last_ins && (last_ins->opcode == OP_STOREI2_MEMBASE_REG) &&
2327                                         ins->inst_basereg == last_ins->inst_destbasereg &&
2328                                         ins->inst_offset == last_ins->inst_offset) {
2329                                 ins->opcode = (ins->opcode == OP_LOADI2_MEMBASE) ? OP_ICONV_TO_I2 : OP_ICONV_TO_U2;
2330                                 ins->sreg1 = last_ins->sreg1;
2331                         }
2332                         break;
2333                 case OP_MOVE:
2334                         /*
2335                          * OP_MOVE reg, reg
2336                          */
2337                         if (ins->dreg == ins->sreg1) {
2338                                 MONO_DELETE_INS (bb, ins);
2339                                 continue;
2340                         }
2341                         /*
2342                          * OP_MOVE sreg, dreg
2343                          * OP_MOVE dreg, sreg
2344                          */
2345                         if (last_ins && last_ins->opcode == OP_MOVE &&
2346                             ins->sreg1 == last_ins->dreg &&
2347                             ins->dreg == last_ins->sreg1) {
2348                                 MONO_DELETE_INS (bb, ins);
2349                                 continue;
2350                         }
2351                         break;
2352                 }
2353         }
2354 }
2355
2356 /*========================= End of Function ========================*/
2357
2358 #define NEW_INS(cfg,dest,op) do {       \
2359                 MONO_INST_NEW ((cfg), (dest), (op)); \
2360                 MONO_INST_LIST_ADD_TAIL (&(dest)->node, &(ins)->node); \
2361         } while (0)
2362
2363 void
2364 mono_arch_lowering_pass (MonoCompile *cfg, MonoBasicBlock *bb)
2365 {
2366         MonoInst *ins, *next, *temp;
2367
2368         if (bb->max_vreg > cfg->rs->next_vreg)
2369                 cfg->rs->next_vreg = bb->max_vreg;
2370
2371         MONO_BB_FOR_EACH_INS_SAFE (bb, next, ins) {
2372                 switch (ins->opcode) {
2373                 case OP_DIV_IMM:
2374                 case OP_REM_IMM:
2375                 case OP_IDIV_IMM:
2376                 case OP_IREM_IMM:
2377                 case OP_IDIV_UN_IMM:
2378                 case OP_IREM_UN_IMM:
2379                         NEW_INS (cfg, temp, OP_ICONST);
2380                         temp->inst_c0 = ins->inst_imm;
2381                         temp->dreg = mono_regstate_next_int (cfg->rs);
2382                         ins->opcode = mono_op_imm_to_op (ins->opcode);
2383                         ins->sreg2 = temp->dreg;
2384                         break;
2385                 default:
2386                         break;
2387                 }
2388         }
2389
2390         bb->max_vreg = cfg->rs->next_vreg;
2391 }
2392
2393 /*========================= End of Function ========================*/
2394
2395 /*------------------------------------------------------------------*/
2396 /*                                                                  */
2397 /* Name         - emit_float_to_int                                 */
2398 /*                                                                  */
2399 /* Function     - Create instructions which will convert a floating */
2400 /*                point value to integer.                           */
2401 /*                                                                  */
2402 /*------------------------------------------------------------------*/
2403
2404 static guchar*
2405 emit_float_to_int (MonoCompile *cfg, guchar *code, int dreg, int sreg, int size, gboolean is_signed)
2406 {
2407         /* sreg is a float, dreg is an integer reg. */
2408         if (is_signed) {
2409                 s390_cfdbr (code, dreg, 5, sreg);
2410                 switch (size) {
2411                         case 1:
2412                                 s390_lhi  (code, s390_r0, 0);
2413                                 s390_lhi  (code, s390_r13, 0xff);
2414                                 s390_ltr  (code, dreg, dreg);
2415                                 s390_jnl  (code, 4);
2416                                 s390_lhi  (code, s390_r0, 0x80);
2417                                 s390_nr   (code, dreg, s390_r13);
2418                                 s390_or   (code, dreg, s390_r0);
2419                                 break;
2420                 }
2421         } else {
2422                 short *o[1];
2423                 s390_basr   (code, s390_r13, 0);
2424                 s390_j      (code, 10);
2425                 s390_llong  (code, 0x41e0000000000000LL);
2426                 s390_llong  (code, 0x41f0000000000000LL);
2427                 s390_ldr    (code, s390_f15, sreg);
2428                 s390_cdb    (code, s390_f15, 0, s390_r13, 4);
2429                 s390_jl     (code, 0); CODEPTR(code, o[0]);
2430                 s390_sdb    (code, s390_f15, 0, s390_r13, 12);
2431                 s390_cfdbr  (code, dreg, 7, s390_f15);
2432                 s390_j      (code, 4);
2433                 PTRSLOT(code, o[0]);
2434                 s390_cfdbr  (code, dreg, 5, sreg);
2435                 switch (size) {
2436                         case 1:
2437                                 s390_lhi  (code, s390_r0, 0xff);
2438                                 s390_nr   (code, dreg, s390_r0);
2439                                 break;
2440                         case 2:
2441                                 s390_lhi  (code, s390_r0, -1);
2442                                 s390_srl  (code, s390_r0, 0, 16);
2443                                 s390_nr   (code, dreg, s390_r0);
2444                                 break;
2445                 }
2446         }
2447         return code;
2448 }
2449
2450 /*========================= End of Function ========================*/
2451
2452 /*------------------------------------------------------------------*/
2453 /*                                                                  */
2454 /* Name         - mono_arch_output_basic_block                      */
2455 /*                                                                  */
2456 /* Function     - Perform the "real" work of emitting instructions  */
2457 /*                that will do the work of in the basic block.      */
2458 /*                                                                  */
2459 /*------------------------------------------------------------------*/
2460
2461 void
2462 mono_arch_output_basic_block (MonoCompile *cfg, MonoBasicBlock *bb)
2463 {
2464         MonoInst *ins, *next;
2465         MonoCallInst *call;
2466         guint offset;
2467         guint8 *code = cfg->native_code + cfg->code_len;
2468         guint last_offset = 0;
2469         int max_len, cpos, src2;
2470
2471         /* we don't align basic blocks of loops on s390 */
2472
2473         if (cfg->verbose_level > 2)
2474                 g_print ("Basic block %d starting at offset 0x%x\n", bb->block_num, bb->native_offset);
2475
2476         cpos = bb->max_offset;
2477
2478         if (cfg->prof_options & MONO_PROFILE_COVERAGE) {
2479                 //MonoCoverageInfo *cov = mono_get_coverage_info (cfg->method);
2480                 //g_assert (!mono_compile_aot);
2481                 //cpos += 6;
2482                 //if (bb->cil_code)
2483                 //      cov->data [bb->dfn].iloffset = bb->cil_code - cfg->cil_code;
2484                 /* this is not thread save, but good enough */
2485                 /* fixme: howto handle overflows? */
2486                 //x86_inc_mem (code, &cov->data [bb->dfn].count);
2487         }
2488
2489         MONO_BB_FOR_EACH_INS (bb, ins) {
2490                 offset = code - cfg->native_code;
2491
2492                 max_len = ((guint8 *)ins_get_spec (ins->opcode))[MONO_INST_LEN];
2493
2494                 if (offset > (cfg->code_size - max_len - 16)) {
2495                         cfg->code_size *= 2;
2496                         cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
2497                         code = cfg->native_code + offset;
2498                 }
2499
2500                 mono_debug_record_line_number (cfg, ins, offset);
2501
2502                 switch (ins->opcode) {
2503                 case OP_STOREI1_MEMBASE_IMM: {
2504                         s390_lhi (code, s390_r0, ins->inst_imm);
2505                         if (s390_is_uimm12(ins->inst_offset))
2506                                 s390_stc (code, s390_r0, 0, ins->inst_destbasereg, 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_stc  (code, s390_r0, s390_r13, ins->inst_destbasereg, 0);
2513                         }
2514                 }
2515                         break;
2516                 case OP_STOREI2_MEMBASE_IMM: {
2517                         s390_lhi (code, s390_r0, ins->inst_imm);
2518                         if (s390_is_uimm12(ins->inst_offset)) {
2519                                 s390_sth (code, s390_r0, 0, ins->inst_destbasereg, ins->inst_offset);
2520                         } else {
2521                                 s390_basr (code, s390_r13, 0);
2522                                 s390_j    (code, 4);
2523                                 s390_word (code, ins->inst_offset);
2524                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2525                                 s390_sth  (code, s390_r0, s390_r13, ins->inst_destbasereg, 0);
2526                         }
2527                 }
2528                         break;
2529                 case OP_STORE_MEMBASE_IMM:
2530                 case OP_STOREI4_MEMBASE_IMM: {
2531                         if (s390_is_imm16(ins->inst_imm)) {
2532                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2533                         } else {
2534                                 s390_basr (code, s390_r13, 0);
2535                                 s390_j    (code, 4);
2536                                 s390_word (code, ins->inst_imm);
2537                                 s390_l    (code, s390_r0, 0, s390_r13, 4);
2538                         }
2539                         if (s390_is_uimm12(ins->inst_offset)) {
2540                                 s390_st  (code, s390_r0, 0, ins->inst_destbasereg, 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_st   (code, s390_r0, s390_r13, ins->inst_destbasereg, 0);
2547                         }
2548                 }
2549                         break;
2550                 case OP_STOREI1_MEMBASE_REG: {
2551                         if (s390_is_uimm12(ins->inst_offset)) {
2552                                 s390_stc  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
2553                         } else {
2554                                 s390_basr (code, s390_r13, 0);
2555                                 s390_j    (code, 4);
2556                                 s390_word (code, ins->inst_offset);
2557                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2558                                 s390_stc  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
2559                         }
2560                 }
2561                         break;
2562                 case OP_STOREI2_MEMBASE_REG: {
2563                         if (s390_is_uimm12(ins->inst_offset)) {
2564                                 s390_sth  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
2565                         } else {
2566                                 s390_basr (code, s390_r13, 0);
2567                                 s390_j    (code, 4);
2568                                 s390_word (code, ins->inst_offset);
2569                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2570                                 s390_sth  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
2571                         }
2572                 }
2573                         break;
2574                 case OP_STORE_MEMBASE_REG:
2575                 case OP_STOREI4_MEMBASE_REG: {
2576                         if (s390_is_uimm12(ins->inst_offset)) {
2577                                 s390_st   (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
2578                         } else {
2579                                 s390_basr (code, s390_r13, 0);
2580                                 s390_j    (code, 4);
2581                                 s390_word (code, ins->inst_offset);
2582                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2583                                 s390_st   (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
2584                         }
2585                 }
2586                         break;
2587                 case OP_LOADU4_MEM:
2588                         g_assert_not_reached ();
2589                         break;
2590                 case OP_LOAD_MEMBASE:
2591                 case OP_LOADI4_MEMBASE:
2592                 case OP_LOADU4_MEMBASE: {
2593                         if (s390_is_uimm12(ins->inst_offset))
2594                                 s390_l    (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
2595                         else {
2596                                 if (s390_is_imm16(ins->inst_offset)) {
2597                                         s390_lhi (code, s390_r13, ins->inst_offset);
2598                                         s390_l   (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
2599                                 } else {
2600                                         s390_basr (code, s390_r13, 0);
2601                                         s390_j    (code, 4);
2602                                         s390_word (code, ins->inst_offset);
2603                                         s390_l    (code, s390_r13, 0, s390_r13, 4);
2604                                         s390_l    (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
2605                                 }
2606                         }
2607                 }
2608                         break;
2609                 case OP_LOADU1_MEMBASE: {
2610                         s390_lhi (code, s390_r0, 0);
2611                         if (s390_is_uimm12(ins->inst_offset))
2612                                 s390_ic   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
2613                         else {
2614                                 s390_basr (code, s390_r13, 0);
2615                                 s390_j    (code, 4);
2616                                 s390_word (code, ins->inst_offset);
2617                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2618                                 s390_ic   (code, s390_r0, s390_r13, ins->inst_basereg, 0);
2619                         }
2620                         s390_lr   (code, ins->dreg, s390_r0);
2621                 }
2622                         break;
2623                 case OP_LOADI1_MEMBASE: {
2624                         s390_lhi (code, s390_r0, 0);
2625                         if (s390_is_uimm12(ins->inst_offset))
2626                                 s390_ic   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
2627                         else {
2628                                 s390_basr (code, s390_r13, 0);
2629                                 s390_j    (code, 4);
2630                                 s390_word (code, ins->inst_offset);
2631                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2632                                 s390_ic   (code, s390_r0, s390_r13, ins->inst_basereg, 0);
2633                         }
2634                         s390_lhi  (code, s390_r13, 0x80);
2635                         s390_nr   (code, s390_r13, s390_r0);
2636                         s390_jz   (code, 5);
2637                         s390_lhi  (code, s390_r13, 0xff00);
2638                         s390_or   (code, s390_r0, s390_r13);
2639                         s390_lr   (code, ins->dreg, s390_r0);
2640                 }
2641                         break;
2642                 case OP_LOADU2_MEMBASE: {
2643                         s390_lhi (code, s390_r0, 0);
2644                         if (s390_is_uimm12(ins->inst_offset))
2645                                 s390_icm  (code, s390_r0, 3, ins->inst_basereg, ins->inst_offset);
2646                         else {
2647                                 s390_basr (code, s390_r13, 0);
2648                                 s390_j    (code, 4);
2649                                 s390_word (code, ins->inst_offset);
2650                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2651                                 s390_ar   (code, s390_r13, ins->inst_basereg);
2652                                 s390_icm  (code, s390_r0, 3, s390_r13, 0);
2653                         }
2654                         s390_lr  (code, ins->dreg, s390_r0);
2655                 }
2656                         break;
2657                 case OP_LOADI2_MEMBASE: {
2658                         s390_lhi (code, s390_r0, 0);
2659                         if (s390_is_uimm12(ins->inst_offset))
2660                                 s390_lh   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
2661                         else {
2662                                 s390_basr (code, s390_r13, 0);
2663                                 s390_j    (code, 4);
2664                                 s390_word (code, ins->inst_offset);
2665                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2666                                 s390_lh   (code, s390_r0, s390_r13, ins->inst_basereg, 0);
2667                         }
2668                         s390_lr  (code, ins->dreg, s390_r0);
2669                 }
2670                         break;
2671                 case OP_ICONV_TO_I1: {
2672                         s390_lhi  (code, s390_r0, 0x80);
2673                         if (ins->dreg != ins->sreg1) {
2674                                 s390_lr   (code, ins->dreg, ins->sreg1);
2675                         }
2676                         s390_nr   (code, s390_r0, ins->sreg1);
2677                         s390_jz   (code, 7);
2678                         s390_lhi  (code, s390_r13, -1);
2679                         s390_sll  (code, s390_r13, 0, 8);
2680                         s390_or   (code, ins->dreg, s390_r13);
2681                 }
2682                         break;
2683                 case OP_ICONV_TO_I2: {
2684                         s390_lhi  (code, s390_r0, 0x80);
2685                         s390_sll  (code, s390_r0, 0, 8);
2686                         if (ins->dreg != ins->sreg1) {
2687                                 s390_lr   (code, ins->dreg, ins->sreg1);
2688                         }
2689                         s390_nr   (code, s390_r0, ins->sreg1);
2690                         s390_jz   (code, 7);
2691                         s390_lhi  (code, s390_r13, -1);
2692                         s390_sll  (code, s390_r13, 0, 16);
2693                         s390_or   (code, ins->dreg, s390_r13);
2694                 }
2695                         break;
2696                 case OP_ICONV_TO_U1: {
2697                         s390_lhi  (code, s390_r0, 0xff);
2698                         if (ins->dreg != ins->sreg1) {
2699                                 s390_lr   (code, ins->dreg, ins->sreg1);
2700                         }
2701                         s390_nr   (code, ins->dreg, s390_r0);
2702                 }
2703                         break;
2704                 case OP_ICONV_TO_U2: {
2705                         s390_lhi  (code, s390_r0, -1);
2706                         s390_sll  (code, s390_r0, 0, 16);
2707                         s390_srl  (code, s390_r0, 0, 16);
2708                         if (ins->dreg != ins->sreg1) {
2709                                 s390_lr   (code, ins->dreg, ins->sreg1);
2710                         }
2711                         s390_nr   (code, ins->dreg, s390_r0);
2712                 }
2713                         break;
2714                 case OP_COMPARE: {
2715                         next = mono_inst_list_next (&ins->node, &bb->ins_list);
2716                         if ((next) &&
2717                             (((next->opcode >= OP_IBNE_UN) &&
2718                               (next->opcode <= OP_IBLT_UN)) ||
2719                              ((next->opcode >= OP_COND_EXC_NE_UN) &&
2720                               (next->opcode <= OP_COND_EXC_LT_UN)) ||
2721                              ((next->opcode == OP_CLT_UN) ||
2722                               (next->opcode == OP_CGT_UN))))
2723                                 s390_clr  (code, ins->sreg1, ins->sreg2);
2724                         else
2725                                 s390_cr   (code, ins->sreg1, ins->sreg2);
2726                 }
2727                         break;
2728                 case OP_COMPARE_IMM: {
2729                         next = mono_inst_list_next (&ins->node, &bb->ins_list);
2730                         if (s390_is_imm16 (ins->inst_imm)) {
2731                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2732                                 if ((next) &&
2733                                     (((next->opcode >= OP_IBNE_UN) &&
2734                                       (next->opcode <= OP_IBLT_UN)) ||
2735                                      ((next->opcode >= OP_COND_EXC_NE_UN) &&
2736                                       (next->opcode <= OP_COND_EXC_LT_UN)) ||
2737                                      ((next->opcode == OP_CLT_UN) ||
2738                                       (next->opcode == OP_CGT_UN))))
2739                                         s390_clr  (code, ins->sreg1, s390_r0);
2740                                 else
2741                                         s390_cr   (code, ins->sreg1, s390_r0);
2742                         }
2743                         else {
2744                                 s390_basr (code, s390_r13, 0);
2745                                 s390_j    (code, 4);
2746                                 s390_word (code, ins->inst_imm);
2747                                 if ((next) &&
2748                                     (((next->opcode >= OP_IBNE_UN) &&
2749                                       (next->opcode <= OP_IBLT_UN)) ||
2750                                      ((next->opcode >= OP_COND_EXC_NE_UN) &&
2751                                       (next->opcode <= OP_COND_EXC_LT_UN)) ||
2752                                      ((next->opcode == OP_CLT_UN) ||
2753                                       (next->opcode == OP_CGT_UN))))
2754                                         s390_cl   (code, ins->sreg1, 0, s390_r13, 4);
2755                                 else
2756                                         s390_c    (code, ins->sreg1, 0, s390_r13, 4);
2757                         }
2758                 }
2759                         break;
2760                 case OP_BREAK: {
2761                         mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS, mono_break);
2762                         s390_brasl (code, s390_r14, 0);
2763                 }
2764                         break;
2765                 case OP_ADDCC: {
2766                         CHECK_SRCDST_COM;
2767                         s390_alr  (code, ins->dreg, src2);
2768                 }
2769                         break;
2770                 case OP_IADD: {
2771                         CHECK_SRCDST_COM;
2772                         s390_ar   (code, ins->dreg, src2);
2773                 }
2774                         break;
2775                 case OP_ADC: {
2776                         CHECK_SRCDST_COM;
2777                         s390_alcr (code, ins->dreg, src2);
2778                 }
2779                         break;
2780                 case OP_ADD_IMM: {
2781                         if (ins->dreg != ins->sreg1) {
2782                                 s390_lr   (code, ins->dreg, ins->sreg1);
2783                         }
2784                         next = mono_inst_list_next (&ins->node, &bb->ins_list);
2785                         if ((next) &&
2786                             (next->opcode == OP_ADC_IMM)) {
2787                                 s390_basr (code, s390_r13, 0);
2788                                 s390_j    (code, 4);
2789                                 s390_word (code, ins->inst_imm);
2790                                 s390_a (code, ins->dreg, 0, s390_r13, 4);
2791                         } else {
2792                                 if (s390_is_imm16 (ins->inst_imm)) {
2793                                         s390_ahi  (code, ins->dreg, ins->inst_imm);
2794                                 } else {
2795                                         s390_basr (code, s390_r13, 0);
2796                                         s390_j    (code, 4);
2797                                         s390_word (code, ins->inst_imm);
2798                                         s390_a (code, ins->dreg, 0, s390_r13, 4);
2799                                 }
2800                         }
2801                 }
2802                         break;
2803                 case OP_ADDCC_IMM: {
2804                         next = mono_inst_list_next (&ins->node, &bb->ins_list);
2805                         if ((next) &&
2806                             (next->opcode == OP_ADC_IMM)) {
2807                                 s390_basr (code, s390_r13, 0);
2808                                 s390_j    (code, 4);
2809                                 s390_word (code, ins->inst_imm);
2810                                 if (ins->dreg != ins->sreg1) {
2811                                         s390_lr   (code, ins->dreg, ins->sreg1);
2812                                 }
2813                                 s390_al   (code, ins->dreg, 0, s390_r13, 4);
2814                         } else {
2815                                 if (s390_is_imm16 (ins->inst_imm)) {
2816                                         if (ins->dreg != ins->sreg1) {
2817                                                 s390_lr   (code, ins->dreg, ins->sreg1);
2818                                         }
2819                                         s390_lhi  (code, s390_r0, ins->inst_imm);
2820                                         s390_alcr (code, ins->dreg, s390_r0);
2821                                 } else {
2822                                         s390_basr (code, s390_r13, 0);
2823                                         s390_j    (code, 4);
2824                                         s390_word (code, ins->inst_imm);
2825                                         if (ins->dreg != ins->sreg1) {
2826                                                 s390_lr   (code, ins->dreg, ins->sreg1);
2827                                         }
2828                                         s390_al   (code, ins->dreg, 0, s390_r13, 4);
2829                                 }
2830                         }
2831                 }
2832                         break;
2833                 case OP_ADC_IMM: {
2834                         if (s390_is_imm16 (ins->inst_imm)) {
2835                                 if (ins->dreg != ins->sreg1) {
2836                                         s390_lr   (code, ins->dreg, ins->sreg1);
2837                                 }
2838                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2839                                 s390_alcr (code, ins->dreg, s390_r0);
2840                         } else {
2841                                 s390_basr (code, s390_r13, 0);
2842                                 s390_j    (code, 4);
2843                                 s390_word (code, ins->inst_imm);
2844                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2845                                 s390_alcr (code, ins->dreg, s390_r13);
2846                         }
2847                 }
2848                         break;
2849                 case OP_IADD_OVF: {
2850                         CHECK_SRCDST_COM;
2851                         s390_ar   (code, ins->dreg, src2);
2852                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2853                 }
2854                         break;
2855                 case OP_IADD_OVF_UN: {
2856                         CHECK_SRCDST_COM;
2857                         s390_alr  (code, ins->dreg, src2);
2858                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
2859                 }
2860                         break;
2861                 case OP_LADD: {
2862                         s390_alr  (code, s390_r0, ins->sreg1);
2863                         s390_jnc  (code, 4);
2864                         s390_ahi  (code, s390_r1, 1);
2865                         s390_ar   (code, s390_r1, ins->sreg2);
2866                         s390_lr   (code, ins->dreg, s390_r0);
2867                         s390_lr   (code, ins->dreg+1, s390_r1);
2868                 }
2869                         break;
2870                 case OP_LADD_OVF: {
2871                         short int *o[1];
2872                         s390_alr  (code, s390_r0, ins->sreg1);
2873                         s390_jnc  (code, 0); CODEPTR(code, o[0]);
2874                         s390_ahi  (code, s390_r1, 1);
2875                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2876                         PTRSLOT   (code, o[0]);
2877                         s390_ar   (code, s390_r1, ins->sreg2);
2878                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2879                         s390_lr   (code, ins->dreg, s390_r0);
2880                         s390_lr   (code, ins->dreg+1, s390_r1);
2881                 }
2882                         break;
2883                 case OP_LADD_OVF_UN: {
2884                         s390_alr  (code, s390_r0, ins->sreg1);
2885                         s390_alcr (code, s390_r1, ins->sreg2);
2886                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
2887                         s390_lr   (code, ins->dreg, s390_r0);
2888                         s390_lr   (code, ins->dreg+1, s390_r1);
2889                 }
2890                         break;
2891                 case OP_ADD_OVF_CARRY: {
2892                         CHECK_SRCDST_COM;
2893                         s390_lhi  (code, s390_r0, 0);
2894                         s390_lr   (code, s390_r1, s390_r0);
2895                         s390_alcr (code, s390_r0, s390_r1);
2896                         s390_ar   (code, ins->dreg, src2);
2897                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2898                         s390_ar   (code, ins->dreg, s390_r0);
2899                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2900                 }
2901                         break;
2902                 case OP_ADD_OVF_UN_CARRY: {
2903                         CHECK_SRCDST_COM;
2904                         s390_alcr (code, ins->dreg, src2);
2905                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
2906                 }
2907                         break;
2908                 case OP_SUBCC: {
2909                         CHECK_SRCDST_NCOM;
2910                         s390_slr (code, ins->dreg, src2);
2911                 }
2912                         break;
2913                 case OP_ISUB: {
2914                         CHECK_SRCDST_NCOM;
2915                         s390_sr   (code, ins->dreg, src2);
2916                 }
2917                         break;
2918                 case OP_SBB: {
2919                         CHECK_SRCDST_NCOM;
2920                         s390_slbr (code, ins->dreg, src2);
2921                 }
2922                         break;
2923                 case OP_SUBCC_IMM: {
2924                         if (s390_is_imm16 (-ins->inst_imm)) {
2925                                 if (ins->dreg != ins->sreg1) {
2926                                         s390_lr   (code, ins->dreg, ins->sreg1);
2927                                 }
2928                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2929                                 s390_slr  (code, ins->dreg, s390_r0);
2930                         } else {
2931                                 s390_basr (code, s390_r13, 0);
2932                                 s390_j    (code, 4);
2933                                 s390_word (code, ins->inst_imm);
2934                                 if (ins->dreg != ins->sreg1) {
2935                                         s390_lr   (code, ins->dreg, ins->sreg1);
2936                                 }
2937                                 s390_sl   (code, ins->dreg, 0, s390_r13, 4);
2938                         }
2939                 }
2940                         break;
2941                 case OP_SUB_IMM: {
2942                         if (s390_is_imm16 (-ins->inst_imm)) {
2943                                 if (ins->dreg != ins->sreg1) {
2944                                         s390_lr   (code, ins->dreg, ins->sreg1);
2945                                 }
2946                                 s390_ahi  (code, ins->dreg, -ins->inst_imm);
2947                         } else {
2948                                 s390_basr (code, s390_r13, 0);
2949                                 s390_j    (code, 4);
2950                                 s390_word (code, ins->inst_imm);
2951                                 if (ins->dreg != ins->sreg1) {
2952                                         s390_lr   (code, ins->dreg, ins->sreg1);
2953                                 }
2954                                 s390_s    (code, ins->dreg, 0, s390_r13, 4);
2955                         }
2956                 }
2957                         break;
2958                 case OP_SBB_IMM: {
2959                         if (ins->dreg != ins->sreg1) {
2960                                 s390_lr    (code, ins->dreg, ins->sreg1);
2961                         }
2962                         if (s390_is_imm16 (-ins->inst_imm)) {
2963                                 s390_lhi   (code, s390_r0, ins->inst_imm);
2964                                 s390_slbr  (code, ins->dreg, s390_r0);
2965                         } else {
2966                                 s390_basr (code, s390_r13, 0);
2967                                 s390_j    (code, 4);
2968                                 s390_word (code, ins->inst_imm);
2969                                 s390_slb  (code, ins->dreg, 0, s390_r13, 4);
2970                         }
2971                 }
2972                         break;
2973                 case OP_ISUB_OVF: {
2974                         CHECK_SRCDST_NCOM;
2975                         s390_sr   (code, ins->dreg, src2);
2976                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
2977                 }
2978                         break;
2979                 case OP_ISUB_OVF_UN: {
2980                         CHECK_SRCDST_NCOM;
2981                         s390_slr  (code, ins->dreg, src2);
2982                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
2983                 }
2984                         break;
2985                 case OP_LSUB: {
2986                         s390_lr   (code, s390_r14, ins->sreg2);
2987                         s390_slr  (code, s390_r0, ins->sreg1);
2988                         s390_jnl  (code, 4);
2989                         s390_ahi  (code, s390_r14, 1);
2990                         s390_sr   (code, s390_r1, s390_r14);
2991                         s390_lr   (code, ins->dreg, s390_r0);
2992                         s390_lr   (code, ins->dreg+1, s390_r1);
2993                 }
2994                         break;
2995                 case OP_LSUB_OVF: {
2996                         short int *o[1];
2997                         s390_lr   (code, s390_r14, ins->sreg2);
2998                         s390_slr  (code, s390_r0, ins->sreg1);
2999                         s390_jnl  (code, 0); CODEPTR(code, o[0]);
3000                         s390_ahi  (code, s390_r14, 1);
3001                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3002                         PTRSLOT   (code, o[0]);
3003                         s390_sr   (code, s390_r1, s390_r14);
3004                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3005                         s390_lr   (code, ins->dreg, s390_r0);
3006                         s390_lr   (code, ins->dreg+1, s390_r1);
3007                 }
3008                         break;
3009                 case OP_LSUB_OVF_UN: {
3010                         s390_slr  (code, s390_r0, ins->sreg1);
3011                         s390_slbr (code, s390_r1, ins->sreg2);
3012                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, "OverflowException");
3013                         s390_lr   (code, ins->dreg, s390_r0);
3014                         s390_lr   (code, ins->dreg+1, s390_r1);
3015                 }
3016                         break;
3017                 case OP_SUB_OVF_CARRY: {
3018                         CHECK_SRCDST_NCOM;
3019                         s390_lhi  (code, s390_r0, 0);
3020                         s390_lr   (code, s390_r1, s390_r0);
3021                         s390_slbr (code, s390_r0, s390_r1);
3022                         s390_sr   (code, ins->dreg, src2);
3023                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3024                         s390_ar   (code, ins->dreg, s390_r0);
3025                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3026                 }
3027                         break;
3028                 case OP_SUB_OVF_UN_CARRY: {
3029                         CHECK_SRCDST_NCOM;
3030                         s390_slbr (code, ins->dreg, src2);
3031                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
3032                 }
3033                         break;
3034                 case OP_IAND: {
3035                         if (ins->sreg1 == ins->dreg) {
3036                                 s390_nr   (code, ins->dreg, ins->sreg2);
3037                         }
3038                         else {
3039                                 if (ins->sreg2 == ins->dreg) {
3040                                         s390_nr  (code, ins->dreg, ins->sreg1);
3041                                 }
3042                                 else {
3043                                         s390_lr  (code, ins->dreg, ins->sreg1);
3044                                         s390_nr  (code, ins->dreg, ins->sreg2);
3045                                 }
3046                         }
3047                 }
3048                         break;
3049                 case OP_AND_IMM: {
3050                         if (s390_is_imm16 (ins->inst_imm)) {
3051                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3052                                 if (ins->dreg != ins->sreg1) {
3053                                         s390_lr   (code, ins->dreg, ins->sreg1);
3054                                 }
3055                                 s390_nr   (code, ins->dreg, s390_r0);
3056                         } else {
3057                                 s390_basr (code, s390_r13, 0);
3058                                 s390_j    (code, 4);
3059                                 s390_word (code, ins->inst_imm);
3060                                 if (ins->dreg != ins->sreg1) {
3061                                         s390_lr   (code, ins->dreg, ins->sreg1);
3062                                 }
3063                                 s390_n    (code, ins->dreg, 0, s390_r13, 4);
3064                         }
3065                 }
3066                         break;
3067                 case OP_IDIV: {
3068                         s390_lr   (code, s390_r0, ins->sreg1);
3069                         s390_srda (code, s390_r0, 0, 32);
3070                         s390_dr   (code, s390_r0, ins->sreg2);
3071                         s390_lr   (code, ins->dreg, s390_r1);
3072                 }
3073                         break;
3074                 case OP_IDIV_UN: {
3075                         s390_lr   (code, s390_r0, ins->sreg1);
3076                         s390_srdl (code, s390_r0, 0, 32);
3077                         s390_dlr  (code, s390_r0, ins->sreg2);
3078                         s390_lr   (code, ins->dreg, s390_r1);
3079                 }
3080                         break;
3081                 case OP_IREM: {
3082                         s390_lr   (code, s390_r0, ins->sreg1);
3083                         s390_srda (code, s390_r0, 0, 32);
3084                         s390_dr   (code, s390_r0, ins->sreg2);
3085                         s390_lr   (code, ins->dreg, s390_r0);
3086                         break;
3087                 case OP_IREM_UN:
3088                         s390_lr   (code, s390_r0, ins->sreg1);
3089                         s390_srdl (code, s390_r0, 0, 32);
3090                         s390_dlr  (code, s390_r0, ins->sreg2);
3091                         s390_lr   (code, ins->dreg, s390_r0);
3092                 }
3093                         break;
3094                 case OP_IOR: {
3095                         if (ins->sreg1 == ins->dreg) {
3096                                 s390_or   (code, ins->dreg, ins->sreg2);
3097                         }
3098                         else {
3099                                 if (ins->sreg2 == ins->dreg) {
3100                                         s390_or  (code, ins->dreg, ins->sreg1);
3101                                 }
3102                                 else {
3103                                         s390_lr  (code, ins->dreg, ins->sreg1);
3104                                         s390_or  (code, ins->dreg, ins->sreg2);
3105                                 }
3106                         }
3107                 }
3108                         break;
3109                 case OP_OR_IMM: {
3110                         if (s390_is_imm16 (ins->inst_imm)) {
3111                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3112                                 if (ins->dreg != ins->sreg1) {
3113                                         s390_lr   (code, ins->dreg, ins->sreg1);
3114                                 }
3115                                 s390_or   (code, ins->dreg, s390_r0);
3116                         } else {
3117                                 s390_basr (code, s390_r13, 0);
3118                                 s390_j    (code, 4);
3119                                 s390_word (code, ins->inst_imm);
3120                                 if (ins->dreg != ins->sreg1) {
3121                                         s390_lr   (code, ins->dreg, ins->sreg1);
3122                                 }
3123                                 s390_o    (code, ins->dreg, 0, s390_r13, 4);
3124                         }
3125                 }
3126                         break;
3127                 case OP_IXOR: {
3128                         if (ins->sreg1 == ins->dreg) {
3129                                 s390_xr   (code, ins->dreg, ins->sreg2);
3130                         }
3131                         else {
3132                                 if (ins->sreg2 == ins->dreg) {
3133                                         s390_xr  (code, ins->dreg, ins->sreg1);
3134                                 }
3135                                 else {
3136                                         s390_lr  (code, ins->dreg, ins->sreg1);
3137                                         s390_xr  (code, ins->dreg, ins->sreg2);
3138                                 }
3139                         }
3140                 }
3141                         break;
3142                 case OP_XOR_IMM: {
3143                         if (s390_is_imm16 (ins->inst_imm)) {
3144                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3145                                 if (ins->dreg != ins->sreg1) {
3146                                         s390_lr   (code, ins->dreg, ins->sreg1);
3147                                 }
3148                                 s390_xr   (code, ins->dreg, s390_r0);
3149                         } else {
3150                                 s390_basr (code, s390_r13, 0);
3151                                 s390_j    (code, 4);
3152                                 s390_word (code, ins->inst_imm);
3153                                 if (ins->dreg != ins->sreg1) {
3154                                         s390_lr   (code, ins->dreg, ins->sreg1);
3155                                 }
3156                                 s390_x    (code, ins->dreg, 0, s390_r13, 4);
3157                         }
3158                 }
3159                         break;
3160                 case OP_ISHL: {
3161                         CHECK_SRCDST_NCOM;
3162                         s390_sll  (code, ins->dreg, src2, 0);
3163                 }
3164                         break;
3165                 case OP_SHL_IMM: {
3166                         if (ins->sreg1 != ins->dreg) {
3167                                 s390_lr   (code, ins->dreg, ins->sreg1);
3168                         }
3169                         s390_sll  (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3170                 }
3171                         break;
3172                 case OP_ISHR: {
3173                         CHECK_SRCDST_NCOM;
3174                         s390_sra  (code, ins->dreg, src2, 0);
3175                 }
3176                         break;
3177                 case OP_SHR_IMM: {
3178                         if (ins->sreg1 != ins->dreg) {
3179                                 s390_lr   (code, ins->dreg, ins->sreg1);
3180                         }
3181                         s390_sra  (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3182                 }
3183                         break;
3184                 case OP_SHR_UN_IMM: {
3185                         if (ins->sreg1 != ins->dreg) {
3186                                 s390_lr   (code, ins->dreg, ins->sreg1);
3187                         }
3188                         s390_srl  (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3189                 }
3190                         break;
3191                 case OP_ISHR_UN: {
3192                         CHECK_SRCDST_NCOM;
3193                         s390_srl  (code, ins->dreg, src2, 0);
3194                 }
3195                         break;
3196                 case OP_INOT: {
3197                         if (ins->sreg1 != ins->dreg) {
3198                                 s390_lr   (code, ins->dreg, ins->sreg1);
3199                         }
3200                         s390_lhi (code, s390_r0, -1);
3201                         s390_xr  (code, ins->dreg, s390_r0);
3202                 }
3203                         break;
3204                 case OP_INEG: {
3205                         s390_lcr (code, ins->dreg, ins->sreg1);
3206                 }
3207                         break;
3208                 case OP_IMUL: {
3209                         if (ins->sreg1 == ins->dreg) {
3210                                 s390_msr  (code, ins->dreg, ins->sreg2);
3211                         }
3212                         else {
3213                                 if (ins->sreg2 == ins->dreg) {
3214                                         s390_msr (code, ins->dreg, ins->sreg1);
3215                                 }
3216                                 else {
3217                                         s390_lr  (code, ins->dreg, ins->sreg1);
3218                                         s390_msr (code, ins->dreg, ins->sreg2);
3219                                 }
3220                         }
3221                 }
3222                         break;
3223                 case OP_MUL_IMM: {
3224                         if (s390_is_imm16 (ins->inst_imm)) {
3225                                 s390_lhi  (code, s390_r13, ins->inst_imm);
3226                         } else {
3227                                 s390_basr (code, s390_r13, 0);
3228                                 s390_j    (code, 4);
3229                                 s390_word (code, ins->inst_imm);
3230 //                              if (ins->dreg != ins->sreg1) {
3231 //                                      s390_lr   (code, ins->dreg, ins->sreg1);
3232 //                              }
3233                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3234                         }
3235                         if (ins->dreg != ins->sreg1) {
3236                                 s390_lr   (code, ins->dreg, ins->sreg1);
3237                         }
3238                         s390_msr  (code, ins->dreg, s390_r13);
3239                 }
3240                         break;
3241                 case OP_IMUL_OVF: {
3242                         short int *o[2];
3243                         s390_ltr  (code, s390_r1, ins->sreg1);
3244                         s390_jz   (code, 0); CODEPTR(code, o[0]);
3245                         s390_ltr  (code, s390_r0, ins->sreg2);
3246                         s390_jnz  (code, 6);
3247                         s390_lhi  (code, s390_r1, 0);
3248                         s390_j    (code, 0); CODEPTR(code, o[1]);
3249                         s390_xr   (code, s390_r0, s390_r1);
3250                         s390_msr  (code, s390_r1, ins->sreg2);
3251                         s390_xr   (code, s390_r0, s390_r1);
3252                         s390_srl  (code, s390_r0, 0, 31);
3253                         s390_ltr  (code, s390_r0, s390_r0);
3254                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3255                         PTRSLOT   (code, o[0]);
3256                         PTRSLOT   (code, o[1]);
3257                         s390_lr   (code, ins->dreg, s390_r1);
3258                 }
3259                         break;
3260                 case OP_IMUL_OVF_UN: {
3261                         s390_lhi  (code, s390_r0, 0);
3262                         s390_lr   (code, s390_r1, ins->sreg1);
3263                         s390_mlr  (code, s390_r0, ins->sreg2);
3264                         s390_ltr  (code, s390_r0, s390_r0);
3265                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3266                         s390_lr   (code, ins->dreg, s390_r1);
3267                 }
3268                         break;
3269                 case OP_LMUL: {
3270                         s390_l    (code, s390_r0, 0, ins->sreg1, 4);
3271                         s390_srda (code, s390_r0, 0, 32);
3272                         s390_m    (code, s390_r0, 0, ins->sreg2, 4);
3273                         s390_l    (code, s390_r0, 0, ins->sreg1, 4);
3274                         s390_srl  (code, s390_r0, 0, 31);
3275                         s390_a    (code, s390_r0, 0, ins->sreg1, 0);
3276                         s390_l    (code, s390_r13, 0, ins->sreg2, 0);
3277                         s390_srl  (code, s390_r13, 0, 31);
3278                         s390_ms   (code, s390_r13, 0, ins->sreg1, 4);
3279                         s390_ar   (code, s390_r0, s390_r13);
3280                         s390_st   (code, s390_r0, 0, ins->dreg, 0);
3281                         s390_st   (code, s390_r1, 0, ins->dreg, 4);
3282                 }
3283                         break;
3284                 case OP_ICONST: {
3285                         if (s390_is_imm16(ins->inst_c0)) {
3286                                 s390_lhi  (code, ins->dreg, ins->inst_c0);
3287                         } else {
3288                                 s390_basr (code, s390_r13, 0);
3289                                 s390_j    (code, 4);
3290                                 s390_word (code, ins->inst_c0);
3291                                 s390_l    (code, ins->dreg, 0, s390_r13, 4);
3292                         }
3293                 }
3294                         break;
3295                 case OP_AOTCONST: {
3296                         s390_basr (code, s390_r13, 0);
3297                         s390_j    (code, 4);
3298                         mono_add_patch_info (cfg, code - cfg->native_code,
3299                                 (MonoJumpInfoType)ins->inst_i1, ins->inst_p0);
3300                         s390_word (code, 0);
3301                         s390_l    (code,ins->dreg, 0, s390_r13, 4);
3302                 }
3303                         break;
3304                 case OP_ICONV_TO_I4:
3305                 case OP_ICONV_TO_U4:
3306                 case OP_MOVE: {
3307                         if (ins->dreg != ins->sreg1) {
3308                                 s390_lr (code, ins->dreg, ins->sreg1);
3309                         }
3310                 }
3311                         break;
3312                 case OP_SETLRET: {
3313                         int saved = ins->sreg1;
3314                         if (ins->sreg1 == s390_r2) {
3315                                 s390_lr (code, s390_r0, ins->sreg1);
3316                                 saved = s390_r0;
3317                         }
3318                         if (ins->sreg2 != s390_r2)
3319                                 s390_lr (code, s390_r2, ins->sreg2);
3320                         if (saved != s390_r3)
3321                                 s390_lr (code, s390_r3, saved);
3322                         break;
3323                 }
3324                 case OP_FMOVE: {
3325                         if (ins->dreg != ins->sreg1) {
3326                                 s390_ldr   (code, ins->dreg, ins->sreg1);
3327                         }
3328                 }
3329                         break;
3330                 case OP_S390_SETF4RET: {
3331                         s390_ledbr (code, ins->dreg, ins->sreg1);
3332                 }
3333                         break;
3334                 case OP_TLS_GET: {
3335                         if (s390_is_imm16 (ins->inst_offset)) {
3336                                 s390_lhi (code, s390_r13, ins->inst_offset);
3337                         } else {
3338                                 s390_bras (code, s390_r13, 0);
3339                                 s390_j    (code, 4);
3340                                 s390_word (code, ins->inst_offset);
3341                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3342                         }
3343                         s390_ear (code, s390_r1, 0);
3344                         s390_l   (code, ins->dreg, s390_r13, s390_r1, 0);
3345                 }
3346                         break;
3347                 case OP_FCONV_TO_R4: {
3348                         NOT_IMPLEMENTED;
3349                         next = mono_inst_list_next (&ins->node, &bb->ins_list);
3350                         if ((next) &&
3351                              (next->opcode != OP_FMOVE) &&
3352                              (next->opcode != OP_STORER4_MEMBASE_REG))
3353                                 s390_ledbr (code, ins->dreg, ins->sreg1);
3354                 }
3355                         break;
3356                 case OP_JMP: {
3357                         if (cfg->method->save_lmf)
3358                                 restoreLMF(code, cfg->frame_reg, cfg->stack_usage);
3359
3360                         if (cfg->flags & MONO_CFG_HAS_TAIL) {
3361                                 code = emit_load_volatile_registers(code, cfg);
3362                         }
3363
3364                         code = backUpStackPtr(cfg, code, STK_BASE);
3365                         s390_l   (code, s390_r14, 0, STK_BASE, S390_RET_ADDR_OFFSET);
3366                         mono_add_patch_info (cfg, code - cfg->native_code,
3367                                              MONO_PATCH_INFO_METHOD_JUMP,
3368                                              ins->inst_p0);
3369                         s390_jcl (code, S390_CC_UN, 0);
3370                 }
3371                         break;
3372                 case OP_CHECK_THIS: {
3373                         /* ensure ins->sreg1 is not NULL */
3374                         s390_icm (code, s390_r0, 15, ins->sreg1, 0);
3375                 }
3376                         break;
3377                 case OP_ARGLIST: {
3378                         int offset = cfg->sig_cookie + cfg->stack_usage;
3379
3380                         if (s390_is_imm16 (offset))
3381                                 s390_lhi  (code, s390_r0, offset);
3382                         else {
3383                                 s390_basr (code, s390_r13, 0);
3384                                 s390_j    (code, 4);
3385                                 s390_word (code, offset);
3386                                 s390_l    (code, s390_r0, 0, s390_r13, 0);
3387                         }
3388                         s390_ar   (code, s390_r0, cfg->frame_reg);
3389                         s390_st   (code, s390_r0, 0, ins->sreg1, 0);
3390                 }
3391                         break;
3392                 case OP_FCALL: {
3393                         call = (MonoCallInst*)ins;
3394                         if (ins->flags & MONO_INST_HAS_METHOD)
3395                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_METHOD,
3396                                                      call->method);
3397                         else
3398                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS,
3399                                                      call->fptr);
3400                         s390_brasl (code, s390_r14, 0);
3401                         if (call->signature->ret->type == MONO_TYPE_R4)
3402                                 s390_ldebr (code, s390_f0, s390_f0);
3403                 }
3404                         break;
3405                 case OP_LCALL:
3406                 case OP_VCALL:
3407                 case OP_VOIDCALL:
3408                 case OP_CALL: {
3409                         call = (MonoCallInst*)ins;
3410                         if (ins->flags & MONO_INST_HAS_METHOD)
3411                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_METHOD, call->method);
3412                         else
3413                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS, call->fptr);
3414                         s390_brasl (code, s390_r14, 0);
3415                 }
3416                         break;
3417                 case OP_FCALL_REG: {
3418                         call = (MonoCallInst*)ins;
3419                         s390_lr   (code, s390_r1, ins->sreg1);
3420                         s390_basr (code, s390_r14, s390_r1);
3421                         if (call->signature->ret->type == MONO_TYPE_R4)
3422                                 s390_ldebr (code, s390_f0, s390_f0);
3423                 }
3424                         break;
3425                 case OP_LCALL_REG:
3426                 case OP_VCALL_REG:
3427                 case OP_VOIDCALL_REG:
3428                 case OP_CALL_REG: {
3429                         s390_lr   (code, s390_r1, ins->sreg1);
3430                         s390_basr (code, s390_r14, s390_r1);
3431                 }
3432                         break;
3433                 case OP_LCALL_MEMBASE:
3434                 case OP_VCALL_MEMBASE:
3435                 case OP_VOIDCALL_MEMBASE:
3436                 case OP_FCALL_MEMBASE:
3437                 case OP_CALL_MEMBASE: {
3438                         if (s390_is_uimm12(ins->inst_offset))
3439                                 s390_l    (code, s390_r1, 0, ins->inst_basereg, ins->inst_offset);
3440                         else {
3441                                 if (s390_is_imm16(ins->inst_offset)) {
3442                                         s390_lhi (code, s390_r13, ins->inst_offset);
3443                                         s390_l   (code, s390_r1, s390_r13, ins->inst_basereg, 0);
3444                                 } else {
3445                                         s390_basr (code, s390_r13, 0);
3446                                         s390_j    (code, 4);
3447                                         s390_word (code, ins->inst_offset);
3448                                         s390_l    (code, s390_r13, 0, s390_r13, 4);
3449                                         s390_l    (code, s390_r1, s390_r13, ins->inst_basereg, 0);
3450                                 }
3451                         }
3452                         s390_basr (code, s390_r14, s390_r1);
3453                         if (ins->opcode == OP_FCALL_MEMBASE && call->signature->ret->type == MONO_TYPE_R4)
3454                                 s390_ldebr (code, s390_f0, s390_f0);
3455                 }
3456                         break;
3457                 case OP_OUTARG:
3458                         g_assert_not_reached ();
3459                         break;
3460                 case OP_LOCALLOC: {
3461                         /*------------------------------------------*/
3462                         /* To allocate space on the stack we have   */
3463                         /* to allow room for parameters passed in   */
3464                         /* calls, the backchain pointer and round   */
3465                         /* it to our stack alignment requirements   */
3466                         /*------------------------------------------*/
3467                         int alloca_skip = S390_MINIMAL_STACK_SIZE + cfg->param_area;
3468                         int area_offset = S390_ALIGN(alloca_skip, S390_STACK_ALIGNMENT);
3469                         s390_lr   (code, s390_r1, ins->sreg1);
3470                         if (ins->flags & MONO_INST_INIT)
3471                                 s390_lr   (code, s390_r0, ins->sreg1);
3472                         s390_ahi  (code, s390_r1, 14);
3473                         s390_srl  (code, s390_r1, 0, 3);
3474                         s390_sll  (code, s390_r1, 0, 3);
3475                         if (cfg->method->save_lmf) {
3476                                 /*----------------------------------*/
3477                                 /* we have to adjust lmf ebp value  */
3478                                 /*----------------------------------*/
3479                                 int lmfOffset = cfg->stack_usage - sizeof(MonoLMF);
3480
3481                                 s390_lr (code, s390_r13, cfg->frame_reg);
3482                                 if (s390_is_uimm16(lmfOffset))
3483                                         s390_ahi   (code, s390_r13, lmfOffset);
3484                                 else {
3485                                         s390_basr (code, s390_r14, 0);
3486                                         s390_j    (code, 4);
3487                                         s390_word (code, lmfOffset);
3488                                         s390_a    (code, s390_r13, 0, s390_r14, 4);
3489                                 }
3490                                 s390_lr (code, s390_r14, STK_BASE);
3491                                 s390_sr (code, s390_r14, s390_r1);
3492                                 s390_st (code, s390_r14, 0, s390_r13,
3493                                          G_STRUCT_OFFSET(MonoLMF, ebp));
3494                         }
3495                         s390_l    (code, s390_r13, 0, STK_BASE, 0);
3496                         s390_sr   (code, STK_BASE, s390_r1);
3497                         s390_st   (code, s390_r13, 0, STK_BASE, 0);
3498                         s390_la   (code, ins->dreg, 0, STK_BASE, area_offset);
3499                         s390_srl  (code, ins->dreg, 0, 3);
3500                         s390_sll  (code, ins->dreg, 0, 3);
3501                         if (ins->flags & MONO_INST_INIT) {
3502                                 s390_lr   (code, s390_r1, s390_r0);
3503                                 s390_lr   (code, s390_r0, ins->dreg);
3504                                 s390_lr   (code, s390_r14, s390_r12);
3505                                 s390_lhi  (code, s390_r13, 0);
3506                                 s390_mvcle(code, s390_r0, s390_r12, 0, 0);
3507                                 s390_jo   (code, -2);
3508                                 s390_lr   (code, s390_r12, s390_r14);
3509                         }
3510                 }
3511                         break;
3512                 case OP_THROW: {
3513                         s390_lr (code, s390_r2, ins->sreg1);
3514                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD,
3515                                              (gpointer)"mono_arch_throw_exception");
3516                         s390_brasl (code, s390_r14, 0);
3517                 }
3518                         break;
3519                 case OP_RETHROW: {
3520                         s390_lr (code, s390_r2, ins->sreg1);
3521                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD,
3522                                              (gpointer)"mono_arch_rethrow_exception");
3523                         s390_brasl (code, s390_r14, 0);
3524                 }
3525                         break;
3526                 case OP_START_HANDLER: {
3527                         if (s390_is_uimm12 (ins->inst_left->inst_offset)) {
3528                                 s390_st   (code, s390_r14, 0,
3529                                            ins->inst_left->inst_basereg,
3530                                            ins->inst_left->inst_offset);
3531                         } else {
3532                                 s390_basr (code, s390_r13, 0);
3533                                 s390_j    (code, 4);
3534                                 s390_word (code, ins->inst_left->inst_offset);
3535                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3536                                 s390_st   (code, s390_r14, s390_r13,
3537                                            ins->inst_left->inst_basereg, 0);
3538                         }
3539                 }
3540                         break;
3541                 case OP_ENDFILTER: {
3542                         if (ins->sreg1 != s390_r2)
3543                                 s390_lr (code, s390_r2, ins->sreg1);
3544                         if (s390_is_uimm12 (ins->inst_left->inst_offset)) {
3545                                 s390_l  (code, s390_r14, 0, ins->inst_left->inst_basereg,
3546                                          ins->inst_left->inst_offset);
3547                         } else {
3548                                 s390_basr (code, s390_r13, 0);
3549                                 s390_j    (code, 4);
3550                                 s390_word (code, ins->inst_left->inst_offset);
3551                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3552                                 s390_l    (code, s390_r14, s390_r13,
3553                                            ins->inst_left->inst_basereg, 0);
3554                         }
3555                         s390_br  (code, s390_r14);
3556                 }
3557                         break;
3558                 case OP_ENDFINALLY: {
3559                         if (s390_is_uimm12 (ins->inst_left->inst_offset)) {
3560                                 s390_l  (code, s390_r14, 0, ins->inst_left->inst_basereg,
3561                                          ins->inst_left->inst_offset);
3562                         } else {
3563                                 s390_basr (code, s390_r13, 0);
3564                                 s390_j    (code, 4);
3565                                 s390_word (code, ins->inst_left->inst_offset);
3566                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3567                                 s390_l    (code, s390_r14, s390_r13,
3568                                            ins->inst_left->inst_basereg, 0);
3569                         }
3570                         s390_br  (code, s390_r14);
3571                 }
3572                         break;
3573                 case OP_CALL_HANDLER: {
3574                         mono_add_patch_info (cfg, code-cfg->native_code,
3575                                              MONO_PATCH_INFO_BB, ins->inst_target_bb);
3576                         s390_brasl (code, s390_r14, 0);
3577                 }
3578                         break;
3579                 case OP_LABEL: {
3580                         ins->inst_c0 = code - cfg->native_code;
3581                 }
3582                         break;
3583                 case OP_BR:
3584                         EMIT_UNCOND_BRANCH(ins);
3585                         break;
3586                 case OP_BR_REG: {
3587                         s390_br  (code, ins->sreg1);
3588                 }
3589                         break;
3590                 case OP_CEQ: {
3591                         s390_lhi (code, ins->dreg, 1);
3592                         s390_jz  (code, 4);
3593                         s390_lhi (code, ins->dreg, 0);
3594                 }
3595                         break;
3596                 case OP_CLT: {
3597                         s390_lhi (code, ins->dreg, 1);
3598                         s390_jl  (code, 4);
3599                         s390_lhi (code, ins->dreg, 0);
3600                 }
3601                         break;
3602                 case OP_CLT_UN: {
3603                         s390_lhi (code, ins->dreg, 1);
3604                         s390_jlo (code, 4);
3605                         s390_lhi (code, ins->dreg, 0);
3606                 }
3607                         break;
3608                 case OP_CGT: {
3609                         s390_lhi (code, ins->dreg, 1);
3610                         s390_jh  (code, 4);
3611                         s390_lhi (code, ins->dreg, 0);
3612                 }
3613                         break;
3614                 case OP_CGT_UN: {
3615                         s390_lhi (code, ins->dreg, 1);
3616                         s390_jho (code, 4);
3617                         s390_lhi (code, ins->dreg, 0);
3618                 }
3619                         break;
3620                 case OP_COND_EXC_EQ:
3621                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_EQ, ins->inst_p1);
3622                         break;
3623                 case OP_COND_EXC_NE_UN:
3624                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NE, ins->inst_p1);
3625                         break;
3626                 case OP_COND_EXC_LT:
3627                 case OP_COND_EXC_LT_UN:
3628                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, ins->inst_p1);
3629                         break;
3630                 case OP_COND_EXC_GT:
3631                 case OP_COND_EXC_GT_UN:
3632                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GT, ins->inst_p1);
3633                         break;
3634                 case OP_COND_EXC_GE:
3635                 case OP_COND_EXC_GE_UN:
3636                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GE, ins->inst_p1);
3637                         break;
3638                 case OP_COND_EXC_LE:
3639                 case OP_COND_EXC_LE_UN:
3640                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LE, ins->inst_p1);
3641                         break;
3642                 case OP_COND_EXC_OV:
3643                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, ins->inst_p1);
3644                         break;
3645                 case OP_COND_EXC_NO:
3646                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NO, ins->inst_p1);
3647                         break;
3648                 case OP_COND_EXC_C:
3649                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, ins->inst_p1);
3650                         break;
3651                 case OP_COND_EXC_NC:
3652                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, ins->inst_p1);
3653                         break;
3654                 case OP_IBEQ:
3655                         EMIT_COND_BRANCH (ins, S390_CC_EQ);
3656                         break;
3657                 case OP_IBNE_UN:
3658                         EMIT_COND_BRANCH (ins, S390_CC_NE);
3659                         break;
3660                 case OP_IBLT:
3661                 case OP_IBLT_UN:
3662                         EMIT_COND_BRANCH (ins, S390_CC_LT);
3663                         break;
3664                 case OP_IBGT:
3665                 case OP_IBGT_UN:
3666                         EMIT_COND_BRANCH (ins, S390_CC_GT);
3667                         break;
3668                 case OP_IBGE:
3669                 case OP_IBGE_UN:
3670                         EMIT_COND_BRANCH (ins, S390_CC_GE);
3671                         break;
3672                 case OP_IBLE:
3673                 case OP_IBLE_UN:
3674                         EMIT_COND_BRANCH (ins, S390_CC_LE);
3675                         break;
3676
3677                 /* floating point opcodes */
3678                 case OP_R8CONST: {
3679                         if (*((float *) ins->inst_p0) == 0) {
3680                                 s390_lzdr (code, ins->dreg);
3681                         } else {
3682                                 s390_basr  (code, s390_r13, 0);
3683                                 s390_j     (code, 4);
3684                                 s390_word  (code, ins->inst_p0);
3685                                 s390_l     (code, s390_r13, 0, s390_r13, 4);
3686                                 s390_ld    (code, ins->dreg, 0, s390_r13, 0);
3687                         }
3688                 }
3689                         break;
3690                 case OP_R4CONST: {
3691                         if (*((float *) ins->inst_p0) == 0) {
3692                                 s390_lzdr (code, ins->dreg);
3693                         } else {
3694                                 s390_basr (code, s390_r13, 0);
3695                                 s390_j    (code, 4);
3696                                 s390_word (code, ins->inst_p0);
3697                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3698                                 s390_ldeb (code, ins->dreg, 0, s390_r13, 0);
3699                         }
3700                 }
3701                         break;
3702                 case OP_STORER8_MEMBASE_REG: {
3703                         if (s390_is_uimm12(ins->inst_offset)) {
3704                                 s390_std  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
3705                         } else {
3706                                 s390_basr (code, s390_r13, 0);
3707                                 s390_j    (code, 4);
3708                                 s390_word (code, ins->inst_offset);
3709                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3710                                 s390_std  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
3711                         }
3712                 }
3713                         break;
3714                 case OP_LOADR8_MEMBASE: {
3715                         if (s390_is_uimm12(ins->inst_offset)) {
3716                                 s390_ld   (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
3717                         } else {
3718                                 s390_basr (code, s390_r13, 0);
3719                                 s390_j    (code, 4);
3720                                 s390_word (code, ins->inst_offset);
3721                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3722                                 s390_ld   (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
3723                         }
3724                 }
3725                         break;
3726                 case OP_STORER4_MEMBASE_REG: {
3727                         if (s390_is_uimm12(ins->inst_offset)) {
3728                                 s390_ledbr(code, s390_f15, ins->sreg1);
3729                                 s390_ste  (code, s390_f15, 0, ins->inst_destbasereg, ins->inst_offset);
3730                         } else {
3731                                 s390_basr (code, s390_r13, 0);
3732                                 s390_j    (code, 4);
3733                                 s390_word (code, ins->inst_offset);
3734                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3735                                 s390_ledbr(code, s390_f15, ins->sreg1);
3736                                 s390_ste  (code, s390_f15, s390_r13, ins->inst_destbasereg, 0);
3737                         }
3738                 }
3739                         break;
3740                 case OP_LOADR4_MEMBASE: {
3741                         if (s390_is_uimm12(ins->inst_offset)) {
3742                                 s390_ldeb (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
3743                         } else {
3744                                 s390_basr (code, s390_r13, 0);
3745                                 s390_j    (code, 4);
3746                                 s390_word (code, ins->inst_offset);
3747                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3748                                 s390_ldeb (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
3749                         }
3750                 }
3751                         break;
3752                 case OP_ICONV_TO_R_UN: {
3753                         s390_cdfbr (code, ins->dreg, ins->sreg1);
3754                         s390_ltr   (code, ins->sreg1, ins->sreg1);
3755                         s390_jnl   (code, 12);
3756                         s390_basr  (code, s390_r13, 0);
3757                         s390_j     (code, 6);
3758                         s390_word  (code, 0x41f00000);
3759                         s390_word  (code, 0);
3760                         s390_adb   (code, ins->dreg, 0, s390_r13, 4);
3761                 }
3762                         break;
3763                 case OP_ICONV_TO_R4: {
3764                         s390_cdfbr (code, ins->dreg, ins->sreg1);
3765                 }
3766                         break;
3767                 case OP_ICONV_TO_R8: {
3768                         s390_cdfbr (code, ins->dreg, ins->sreg1);
3769                 }
3770                         break;
3771                 case OP_FCONV_TO_I1:
3772                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 1, TRUE);
3773                         break;
3774                 case OP_FCONV_TO_U1:
3775                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 1, FALSE);
3776                         break;
3777                 case OP_FCONV_TO_I2:
3778                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 2, TRUE);
3779                         break;
3780                 case OP_FCONV_TO_U2:
3781                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 2, FALSE);
3782                         break;
3783                 case OP_FCONV_TO_I4:
3784                 case OP_FCONV_TO_I:
3785                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 4, TRUE);
3786                         break;
3787                 case OP_FCONV_TO_U4:
3788                 case OP_FCONV_TO_U:
3789                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 4, FALSE);
3790                         break;
3791                 case OP_FCONV_TO_I8:
3792                 case OP_FCONV_TO_U8:
3793                         g_assert_not_reached ();
3794                         /* Implemented as helper calls */
3795                         break;
3796                 case OP_LCONV_TO_R_UN:
3797                         g_assert_not_reached ();
3798                         /* Implemented as helper calls */
3799                         break;
3800                 case OP_LCONV_TO_OVF_I: {
3801                         /* Valid ints: 0xffffffff:8000000 to 00000000:0x7f000000 */
3802                         short int *o[5];
3803                         s390_ltr  (code, ins->sreg1, ins->sreg1);
3804                         s390_jnl  (code, 0); CODEPTR(code, o[0]);
3805                         s390_ltr  (code, ins->sreg2, ins->sreg2);
3806                         s390_jnl  (code, 0); CODEPTR(code, o[1]);
3807                         s390_lhi  (code, s390_r13, -1);
3808                         s390_cr   (code, ins->sreg2, s390_r13);
3809                         s390_jnz  (code, 0); CODEPTR(code, o[2]);
3810                         s390_j    (code, 0); CODEPTR(code, o[3]);
3811                         PTRSLOT(code, o[0]);
3812                         s390_ltr  (code, ins->sreg2, ins->sreg2);
3813                         s390_jz   (code, 0); CODEPTR(code, o[4]);
3814                         PTRSLOT(code, o[1]);
3815                         PTRSLOT(code, o[2]);
3816                         mono_add_patch_info (cfg, code - cfg->native_code,
3817                                              MONO_PATCH_INFO_EXC, "OverflowException");
3818                         s390_brasl (code, s390_r14, 0);
3819                         PTRSLOT(code, o[3]);
3820                         PTRSLOT(code, o[4]);
3821                         if (ins->dreg != ins->sreg1)
3822                                 s390_lr   (code, ins->dreg, ins->sreg1);
3823                 }
3824                         break;
3825                 case OP_SQRT: {
3826                         s390_sqdbr (code, ins->dreg, ins->sreg1);
3827                 }
3828                         break;
3829                 case OP_FADD: {
3830                         CHECK_SRCDST_COM_F;
3831                         s390_adbr (code, ins->dreg, src2);
3832                 }
3833                         break;
3834                 case OP_FSUB: {
3835                         CHECK_SRCDST_NCOM_F;
3836                         s390_sdbr (code, ins->dreg, src2);
3837                 }
3838                         break;
3839                 case OP_FMUL: {
3840                         CHECK_SRCDST_COM_F;
3841                         s390_mdbr (code, ins->dreg, src2);
3842                 }
3843                         break;
3844                 case OP_FDIV: {
3845                         CHECK_SRCDST_NCOM_F;
3846                         s390_ddbr (code, ins->dreg, src2);
3847                 }
3848                         break;
3849                 case OP_FNEG: {
3850                         s390_lcdbr (code, ins->dreg, ins->sreg1);
3851                 }
3852                         break;
3853                 case OP_FREM: {
3854                         CHECK_SRCDST_NCOM_F;
3855                         s390_didbr (code, ins->dreg, src2, 5, s390_f15);
3856                 }
3857                         break;
3858                 case OP_FCOMPARE: {
3859                         s390_cdbr (code, ins->sreg1, ins->sreg2);
3860                 }
3861                         break;
3862                 case OP_FCEQ: {
3863                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3864                         s390_lhi   (code, ins->dreg, 1);
3865                         s390_je    (code, 4);
3866                         s390_lhi   (code, ins->dreg, 0);
3867                 }
3868                         break;
3869                 case OP_FCLT: {
3870                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3871                         s390_lhi   (code, ins->dreg, 1);
3872                         s390_jl    (code, 4);
3873                         s390_lhi   (code, ins->dreg, 0);
3874                 }
3875                         break;
3876                 case OP_FCLT_UN: {
3877                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3878                         s390_lhi   (code, ins->dreg, 1);
3879                         s390_jlo   (code, 4);
3880                         s390_lhi   (code, ins->dreg, 0);
3881                 }
3882                         break;
3883                 case OP_FCGT: {
3884                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3885                         s390_lhi   (code, ins->dreg, 1);
3886                         s390_jh    (code, 4);
3887                         s390_lhi   (code, ins->dreg, 0);
3888                 }
3889                         break;
3890                 case OP_FCGT_UN: {
3891                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
3892                         s390_lhi   (code, ins->dreg, 1);
3893                         s390_jho   (code, 4);
3894                         s390_lhi   (code, ins->dreg, 0);
3895                 }
3896                         break;
3897                 case OP_FBEQ: {
3898                         short *o;
3899                         s390_jo (code, 0); CODEPTR(code, o);
3900                         EMIT_COND_BRANCH (ins, S390_CC_EQ);
3901                         PTRSLOT(code, o);
3902                 }
3903                         break;
3904                 case OP_FBNE_UN:
3905                         EMIT_COND_BRANCH (ins, S390_CC_NE|S390_CC_OV);
3906                         break;
3907                 case OP_FBLT: {
3908                         short *o;
3909                         s390_jo (code, 0); CODEPTR(code, o);
3910                         EMIT_COND_BRANCH (ins, S390_CC_LT);
3911                         PTRSLOT(code, o);
3912                 }
3913                         break;
3914                 case OP_FBLT_UN:
3915                         EMIT_COND_BRANCH (ins, S390_CC_LT|S390_CC_OV);
3916                         break;
3917                 case OP_FBGT: {
3918                         short *o;
3919                         s390_jo (code, 0); CODEPTR(code, o);
3920                         EMIT_COND_BRANCH (ins, S390_CC_GT);
3921                         PTRSLOT(code, o);
3922                 }
3923                         break;
3924                 case OP_FBGT_UN:
3925                         EMIT_COND_BRANCH (ins, S390_CC_GT|S390_CC_OV);
3926                         break;
3927                 case OP_FBGE: {
3928                         short *o;
3929                         s390_jo (code, 0); CODEPTR(code, o);
3930                         EMIT_COND_BRANCH (ins, S390_CC_GE);
3931                         PTRSLOT(code, o);
3932                 }
3933                         break;
3934                 case OP_FBGE_UN:
3935                         EMIT_COND_BRANCH (ins, S390_CC_GE|S390_CC_OV);
3936                         break;
3937                 case OP_FBLE: {
3938                         short *o;
3939                         s390_jo (code, 0); CODEPTR(code, o);
3940                         EMIT_COND_BRANCH (ins, S390_CC_LE);
3941                         PTRSLOT(code, o);
3942                 }
3943                         break;
3944                 case OP_FBLE_UN:
3945                         EMIT_COND_BRANCH (ins, S390_CC_LE|S390_CC_OV);
3946                         break;
3947                 case OP_CKFINITE: {
3948                         short *o;
3949                         s390_lhi  (code, s390_r13, 0x7f);
3950                         s390_tcdb (code, ins->sreg1, 0, s390_r13, 0);
3951                         s390_jz   (code, 0); CODEPTR(code, o);
3952                         mono_add_patch_info (cfg, code - cfg->native_code,
3953                                              MONO_PATCH_INFO_EXC, "ArithmeticException");
3954                         s390_brasl (code, s390_r14,0);
3955                         PTRSLOT(code, o);
3956                 }
3957                         break;
3958                 case OP_S390_MOVE: {
3959                         if (ins->backend.size > 0) {
3960                                 if (ins->backend.size <= 256) {
3961                                         s390_mvc  (code, ins->backend.size, ins->dreg,
3962                                                    ins->inst_offset, ins->sreg1, ins->inst_imm);
3963                                 } else {
3964                                         s390_lr   (code, s390_r0, ins->dreg);
3965                                         if (s390_is_imm16 (ins->inst_offset)) {
3966                                                 s390_ahi  (code, s390_r0, ins->inst_offset);
3967                                         } else {
3968                                                 s390_basr (code, s390_r13, 0);
3969                                                 s390_j    (code, 4);
3970                                                 s390_word (code, ins->inst_offset);
3971                                                 s390_a    (code, s390_r0, 0, s390_r13, 4);
3972                                         }
3973                                         s390_lr   (code, s390_r14, s390_r12);
3974                                         s390_lr   (code, s390_r12, ins->sreg1);
3975                                         if (s390_is_imm16 (ins->inst_imm)) {
3976                                                 s390_ahi  (code, s390_r12, ins->inst_imm);
3977                                         } else {
3978                                                 s390_basr (code, s390_r13, 0);
3979                                                 s390_j    (code, 4);
3980                                                 s390_word (code, ins->inst_imm);
3981                                                 s390_a    (code, s390_r12, 0, s390_r13, 4);
3982                                         }
3983                                         s390_lr   (code, s390_r1, ins->sreg1);
3984                                         s390_lr   (code, s390_r13, s390_r1);
3985                                         s390_mvcle(code, s390_r0, s390_r12, 0, 0);
3986                                         s390_jo   (code, -2);
3987                                         s390_lr   (code, s390_r12, s390_r14);
3988                                 }
3989                         }
3990                 }
3991                         break;
3992                 case OP_ATOMIC_ADD_I4: {
3993                         s390_lr  (code, s390_r1, ins->sreg2);
3994                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
3995                         s390_a   (code, s390_r1, 0, ins->inst_basereg, ins->inst_offset);
3996                         s390_cs  (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
3997                         s390_jnz (code, -7);
3998                         s390_lr  (code, ins->dreg, s390_r1);
3999                 }
4000                         break;
4001                 case OP_ATOMIC_ADD_NEW_I4: {
4002                         s390_lr  (code, s390_r1, ins->sreg2);
4003                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4004                         s390_a   (code, s390_r1, 0, ins->inst_basereg, ins->inst_offset);
4005                         s390_cs  (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
4006                         s390_jnz (code, -7);
4007                         s390_lr  (code, ins->dreg, s390_r1);
4008                 }
4009                         break;
4010                 case OP_ATOMIC_EXCHANGE_I4: {
4011                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4012                         s390_cs  (code, s390_r0, ins->sreg2, ins->inst_basereg, ins->inst_offset);
4013                         s390_jnz (code, -4);
4014                         s390_lr  (code, ins->dreg, s390_r0);
4015                 }
4016                         break;
4017                 case OP_S390_BKCHAIN: {
4018                         s390_lr  (code, ins->dreg, ins->sreg1);
4019                         if (s390_is_imm16 (cfg->stack_offset)) {
4020                                 s390_ahi (code, ins->dreg, cfg->stack_offset);
4021                         } else {
4022                                 s390_basr (code, s390_r13, 0);
4023                                 s390_j    (code, 6);
4024                                 s390_word (code, cfg->stack_offset);
4025                                 s390_a    (code, ins->dreg, 0, s390_r13, 4);
4026                         }
4027                 }
4028                 case OP_MEMORY_BARRIER: {
4029                 }
4030                         break;
4031                 default:
4032                         g_warning ("unknown opcode %s in %s()\n", mono_inst_name (ins->opcode), __FUNCTION__);
4033                         g_assert_not_reached ();
4034                 }
4035
4036                 if ((cfg->opt & MONO_OPT_BRANCH) && ((code - cfg->native_code - offset) > max_len)) {
4037                         g_warning ("wrong maximal instruction length of instruction %s (expected %d, got %d)",
4038                                    mono_inst_name (ins->opcode), max_len, code - cfg->native_code - offset);
4039                         g_assert_not_reached ();
4040                 }
4041
4042                 cpos += max_len;
4043
4044                 last_offset = offset;
4045         }
4046
4047         cfg->code_len = code - cfg->native_code;
4048 }
4049
4050 /*========================= End of Function ========================*/
4051
4052 /*------------------------------------------------------------------*/
4053 /*                                                                  */
4054 /* Name         - mono_arch_register_lowlevel_calls                 */
4055 /*                                                                  */
4056 /* Function     - Register routines to help with --trace operation. */
4057 /*                                                                  */
4058 /*------------------------------------------------------------------*/
4059
4060 void
4061 mono_arch_register_lowlevel_calls (void)
4062 {
4063         mono_register_jit_icall (mono_arch_get_lmf_addr, "mono_arch_get_lmf_addr", NULL, TRUE);
4064 }
4065
4066 /*========================= End of Function ========================*/
4067
4068 /*------------------------------------------------------------------*/
4069 /*                                                                  */
4070 /* Name         - mono_arch_patch_code                              */
4071 /*                                                                  */
4072 /* Function     - Process the patch data created during the         */
4073 /*                instruction build process. This resolves jumps,   */
4074 /*                calls, variables etc.                             */
4075 /*                                                                  */
4076 /*------------------------------------------------------------------*/
4077
4078 void
4079 mono_arch_patch_code (MonoMethod *method, MonoDomain *domain,
4080                       guint8 *code, MonoJumpInfo *ji, gboolean run_cctors)
4081 {
4082         MonoJumpInfo *patch_info;
4083
4084         for (patch_info = ji; patch_info; patch_info = patch_info->next) {
4085                 unsigned char *ip = patch_info->ip.i + code;
4086                 gconstpointer target = NULL;
4087
4088                 target = mono_resolve_patch_target (method, domain, code,
4089                                                     patch_info, run_cctors);
4090
4091                 switch (patch_info->type) {
4092                         case MONO_PATCH_INFO_IP:
4093                         case MONO_PATCH_INFO_EXC_NAME:
4094                         case MONO_PATCH_INFO_LDSTR:
4095                         case MONO_PATCH_INFO_TYPE_FROM_HANDLE:
4096                         case MONO_PATCH_INFO_LDTOKEN:
4097                         case MONO_PATCH_INFO_EXC:
4098                                 continue;
4099                         case MONO_PATCH_INFO_SWITCH:
4100                                 /*----------------------------------*/
4101                                 /* ip points at the basr r13,0/j +4 */
4102                                 /* instruction the vtable value     */
4103                                 /* follows this (i.e. ip+6)         */
4104                                 /*----------------------------------*/
4105                                 *((gconstpointer *)(ip+6)) = target;
4106                                 target = NULL;
4107                                 continue;
4108                         case MONO_PATCH_INFO_METHODCONST:
4109                         case MONO_PATCH_INFO_CLASS:
4110                         case MONO_PATCH_INFO_IMAGE:
4111                         case MONO_PATCH_INFO_FIELD:
4112                         case MONO_PATCH_INFO_IID:
4113                                 target = S390_RELATIVE(target, ip);
4114                                 continue;
4115                         case MONO_PATCH_INFO_R4:
4116                         case MONO_PATCH_INFO_R8:
4117                         case MONO_PATCH_INFO_METHOD_REL:
4118                                 g_assert_not_reached ();
4119                                 continue;
4120                         default:
4121                                 target = S390_RELATIVE(target, ip);
4122                                 ip += 2;
4123                 }
4124                 s390_patch (ip, (guint32) target);
4125         }
4126 }
4127
4128 /*========================= End of Function ========================*/
4129
4130 /*------------------------------------------------------------------*/
4131 /*                                                                  */
4132 /* Name         - emit_load_volatile_registers                      */
4133 /*                                                                  */
4134 /* Function     - Create the instruction sequence for loading the   */
4135 /*                parameter registers for use with the 'tail' op.   */
4136 /*                                                                  */
4137 /*                The register loading operations performed here    */
4138 /*                are the mirror of the store operations performed  */
4139 /*                in mono_arch_emit_prolog and need to be kept in   */
4140 /*                synchronization with it.                          */
4141 /*                                                                  */
4142 /*------------------------------------------------------------------*/
4143
4144 guint8 *
4145 emit_load_volatile_registers (guint8 * code, MonoCompile *cfg)
4146 {
4147         MonoMethod *method = cfg->method;
4148         MonoMethodSignature *sig;
4149         MonoInst *inst;
4150         int pos, i;
4151         CallInfo *cinfo;
4152
4153         sig = mono_method_signature (method);
4154         pos = 0;
4155
4156         cinfo = get_call_info (cfg, cfg->mempool, sig, sig->pinvoke);
4157
4158         if (cinfo->struct_ret) {
4159                 ArgInfo *ainfo = &cinfo->ret;
4160                 inst         = cfg->vret_addr;
4161                 s390_l (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4162         }
4163
4164         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
4165                 ArgInfo *ainfo = cinfo->args + i;
4166                 inst = cfg->args [pos];
4167
4168                 if (inst->opcode == OP_REGVAR) {
4169                         if (ainfo->regtype == RegTypeGeneral)
4170                                 s390_lr (code, ainfo->reg, inst->dreg);
4171                         else if (ainfo->regtype == RegTypeFP) {
4172                                 if (inst->dreg != ainfo->reg) {
4173                                         if (ainfo->size == 4) {
4174                                                 s390_ldebr (code, ainfo->reg, inst->dreg);
4175                                         } else {
4176                                                 s390_ldr   (code, ainfo->reg, inst->dreg);
4177                                         }
4178                                 }
4179                         }
4180                         else if (ainfo->regtype == RegTypeBase) {
4181                         } else
4182                                 g_assert_not_reached ();
4183                 } else {
4184                         if (ainfo->regtype == RegTypeGeneral) {
4185                                 if (!((ainfo->reg >= 2) && (ainfo->reg <= 6)))
4186                                         g_assert_not_reached();
4187                                 switch (ainfo->size) {
4188                                 case 1:
4189                                         s390_ic (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4190                                         break;
4191                                 case 2:
4192                                         s390_lh (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4193                                         break;
4194                                 case 8:
4195                                         s390_lm (code, ainfo->reg, ainfo->reg + 1,
4196                                                   inst->inst_basereg, inst->inst_offset);
4197                                         break;
4198                                 default:
4199                                         s390_l  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4200                                 }
4201                         } else if (ainfo->regtype == RegTypeBase) {
4202                         } else if (ainfo->regtype == RegTypeFP) {
4203                                 if (ainfo->size == 8)
4204                                         s390_ld (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4205                                 else if (ainfo->size == 4)
4206                                         s390_le (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4207                                 else
4208                                         g_assert_not_reached ();
4209                         } else if (ainfo->regtype == RegTypeStructByVal) {
4210                                 if (ainfo->reg != STK_BASE) {
4211                                         switch (ainfo->size) {
4212                                         case 1:
4213                                                 s390_ic (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4214                                                 break;
4215                                         case 2:
4216                                                 s390_lh (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4217                                                 break;
4218                                         case 4:
4219                                                 s390_l  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4220                                                 break;
4221                                         case 8:
4222                                                 s390_lm (code, ainfo->reg, ainfo->reg+1, inst->inst_basereg, inst->inst_offset);
4223                                                 break;
4224                                         }
4225                                 }
4226                         } else if (ainfo->regtype == RegTypeStructByAddr) {
4227                                 if (ainfo->reg != STK_BASE) {
4228                                         s390_l  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4229                                 }
4230                         } else
4231                                 g_assert_not_reached ();
4232                 }
4233                 pos++;
4234         }
4235
4236         return code;
4237 }
4238
4239 /*========================= End of Function ========================*/
4240
4241 /*------------------------------------------------------------------*/
4242 /*                                                                  */
4243 /* Name         - mono_arch_emit_prolog                             */
4244 /*                                                                  */
4245 /* Function     - Create the instruction sequence for a function    */
4246 /*                prolog.                                           */
4247 /*                                                                  */
4248 /*------------------------------------------------------------------*/
4249
4250 guint8 *
4251 mono_arch_emit_prolog (MonoCompile *cfg)
4252 {
4253         MonoMethod *method = cfg->method;
4254         MonoBasicBlock *bb;
4255         MonoMethodSignature *sig;
4256         MonoInst *inst;
4257         int alloc_size, pos, max_offset, i;
4258         guint8 *code;
4259         CallInfo *cinfo;
4260         int tracing = 0;
4261         int lmfOffset;                                                          \
4262
4263         if (mono_jit_trace_calls != NULL && mono_trace_eval (method))
4264                 tracing = 1;
4265
4266         cfg->code_size   = 512;
4267         cfg->native_code = code = g_malloc (cfg->code_size);
4268
4269         s390_stm  (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
4270
4271         if (cfg->flags & MONO_CFG_HAS_ALLOCA) {
4272                 cfg->used_int_regs |= 1 << 11;
4273         }
4274
4275         alloc_size = cfg->stack_offset;
4276
4277         cfg->stack_usage = alloc_size;
4278         s390_lr   (code, s390_r11, STK_BASE);
4279         if (s390_is_uimm16 (alloc_size)) {
4280                 s390_ahi  (code, STK_BASE, -alloc_size);
4281         } else {
4282                 int stackSize = alloc_size;
4283                 while (stackSize > 32767) {
4284                         s390_ahi  (code, STK_BASE, -32767);
4285                         stackSize -= 32767;
4286                 }
4287                 s390_ahi  (code, STK_BASE, -stackSize);
4288         }
4289         s390_st   (code, s390_r11, 0, STK_BASE, 0);
4290
4291         if (cfg->frame_reg != STK_BASE)
4292                 s390_lr (code, s390_r11, STK_BASE);
4293
4294         /* compute max_offset in order to use short forward jumps
4295          * we always do it on s390 because the immediate displacement
4296          * for jumps is too small
4297          */
4298         max_offset = 0;
4299         for (bb = cfg->bb_entry; bb; bb = bb->next_bb) {
4300                 MonoInst *ins;
4301                 bb->max_offset = max_offset;
4302
4303                 if (cfg->prof_options & MONO_PROFILE_COVERAGE)
4304                         max_offset += 6;
4305
4306                 MONO_BB_FOR_EACH_INS (bb, ins)
4307                         max_offset += ((guint8 *)ins_get_spec (ins->opcode))[MONO_INST_LEN];
4308         }
4309
4310         /* load arguments allocated to register from the stack */
4311         sig = mono_method_signature (method);
4312         pos = 0;
4313
4314         cinfo = get_call_info (cfg, cfg->mempool, sig, sig->pinvoke);
4315
4316         if (cinfo->struct_ret) {
4317                 ArgInfo *ainfo = &cinfo->ret;
4318                 inst         = cfg->vret_addr;
4319                 inst->backend.size = ainfo->vtsize;
4320                 s390_st (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4321         }
4322
4323         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
4324                 ArgInfo *ainfo = cinfo->args + i;
4325                 inst = cfg->args [pos];
4326
4327                 if (inst->opcode == OP_REGVAR) {
4328                         if (ainfo->regtype == RegTypeGeneral)
4329                                 s390_lr (code, inst->dreg, ainfo->reg);
4330                         else if (ainfo->regtype == RegTypeFP) {
4331                                 if (inst->dreg != ainfo->reg) {
4332                                         if (ainfo->size == 4) {
4333                                                 s390_ledbr (code, inst->dreg, ainfo->reg);
4334                                         } else {
4335                                                 s390_ldr   (code, inst->dreg, ainfo->reg);
4336                                         }
4337                                 }
4338                         }
4339                         else if (ainfo->regtype == RegTypeBase) {
4340                                 s390_lr  (code, s390_r13, STK_BASE);
4341                                 s390_ahi (code, s390_r13, alloc_size);
4342                                 s390_l   (code, inst->dreg, 0, s390_r13, ainfo->offset);
4343                         } else
4344                                 g_assert_not_reached ();
4345
4346                         if (cfg->verbose_level > 2)
4347                                 g_print ("Argument %d assigned to register %s\n",
4348                                          pos, mono_arch_regname (inst->dreg));
4349                 } else {
4350                         if (ainfo->regtype == RegTypeGeneral) {
4351                                 if (!((ainfo->reg >= 2) && (ainfo->reg <= 6)))
4352                                         g_assert_not_reached();
4353                                 switch (ainfo->size) {
4354                                 case 1:
4355                                         s390_stc (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4356                                         break;
4357                                 case 2:
4358                                         s390_sth (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4359                                         break;
4360                                 case 8:
4361                                         s390_stm (code, ainfo->reg, ainfo->reg + 1,
4362                                                   inst->inst_basereg, inst->inst_offset);
4363                                         break;
4364                                 default:
4365                                         s390_st  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4366                                 }
4367                         } else if (ainfo->regtype == RegTypeBase) {
4368                         } else if (ainfo->regtype == RegTypeFP) {
4369                                 if (ainfo->size == 8)
4370                                         s390_std (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4371                                 else if (ainfo->size == 4)
4372                                         s390_ste (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4373                                 else
4374                                         g_assert_not_reached ();
4375                         } else if (ainfo->regtype == RegTypeStructByVal) {
4376                                 int doffset = inst->inst_offset;
4377                                 int reg;
4378                                 if (ainfo->reg != STK_BASE)
4379                                         reg = ainfo->reg;
4380                                 else {
4381                                         reg = s390_r0;
4382                                         s390_lr  (code, s390_r13, STK_BASE);
4383                                         s390_ahi (code, s390_r13, alloc_size);
4384                                 }
4385                                 switch (ainfo->size) {
4386                                         case 1:
4387                                                 if (ainfo->reg == STK_BASE)
4388                                                         s390_ic  (code, reg, 0, s390_r13, ainfo->offset+3);
4389                                                 s390_stc (code, reg, 0, inst->inst_basereg, doffset);
4390                                                 break;
4391                                         case 2:
4392                                                 if (ainfo->reg == STK_BASE)
4393                                                         s390_lh  (code, reg, 0, s390_r13, ainfo->offset+2);
4394                                                 s390_sth (code, reg, 0, inst->inst_basereg, doffset);
4395                                                 break;
4396                                         case 4:
4397                                                 if (ainfo->reg == STK_BASE)
4398                                                         s390_l   (code, reg, 0, s390_r13, ainfo->offset);
4399                                                 s390_st  (code, reg, 0, inst->inst_basereg, doffset);
4400                                                 break;
4401                                         case 8:
4402                                                 if (ainfo->reg == STK_BASE)
4403                                                         s390_lm  (code, s390_r0, s390_r1, s390_r13, ainfo->offset);
4404                                                 s390_stm (code, reg, reg+1, inst->inst_basereg, doffset);
4405                                                 break;
4406                                 }
4407                         } else if (ainfo->regtype == RegTypeStructByAddr) {
4408                                 if (ainfo->reg != STK_BASE)
4409                                         s390_st  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4410                         } else
4411                                 g_assert_not_reached ();
4412                 }
4413                 pos++;
4414         }
4415
4416         if (method->save_lmf) {
4417                 /*---------------------------------------------------------------*/
4418                 /* we build the MonoLMF structure on the stack - see mini-s390.h */
4419                 /*---------------------------------------------------------------*/
4420                 lmfOffset = alloc_size - sizeof(MonoLMF);
4421
4422                 s390_lr    (code, s390_r13, cfg->frame_reg);
4423                 if (s390_is_uimm16(lmfOffset))
4424                         s390_ahi   (code, s390_r13, lmfOffset);
4425                 else {
4426                         s390_basr (code, s390_r14, 0);
4427                         s390_j    (code, 4);
4428                         s390_word (code, lmfOffset);
4429                         s390_a    (code, s390_r13, 0, s390_r14, 4);
4430                 }
4431
4432                 /*---------------------------------------------------------------*/
4433                 /* Preserve the parameter registers while we fix up the lmf      */
4434                 /*---------------------------------------------------------------*/
4435                 s390_stm   (code, s390_r2, s390_r6, s390_r13,
4436                             G_STRUCT_OFFSET(MonoLMF, pregs[0]));
4437
4438                 /*---------------------------------------------------------------*/
4439                 /* On return from this call r2 have the address of the &lmf      */
4440                 /*---------------------------------------------------------------*/
4441                 mono_add_patch_info (cfg, code - cfg->native_code,
4442                                      MONO_PATCH_INFO_INTERNAL_METHOD,
4443                                      (gpointer)"mono_get_lmf_addr");
4444                 s390_brasl (code, s390_r14, 0);
4445
4446                 /*---------------------------------------------------------------*/
4447                 /* Set lmf.lmf_addr = jit_tls->lmf                               */
4448                 /*---------------------------------------------------------------*/
4449                 s390_st    (code, s390_r2, 0, s390_r13,
4450                             G_STRUCT_OFFSET(MonoLMF, lmf_addr));
4451
4452                 /*---------------------------------------------------------------*/
4453                 /* Get current lmf                                               */
4454                 /*---------------------------------------------------------------*/
4455                 s390_l     (code, s390_r0, 0, s390_r2, 0);
4456
4457                 /*---------------------------------------------------------------*/
4458                 /* Set our lmf as the current lmf                                */
4459                 /*---------------------------------------------------------------*/
4460                 s390_st    (code, s390_r13, 0, s390_r2, 0);
4461
4462                 /*---------------------------------------------------------------*/
4463                 /* Have our lmf.previous_lmf point to the last lmf               */
4464                 /*---------------------------------------------------------------*/
4465                 s390_st    (code, s390_r0, 0, s390_r13,
4466                             G_STRUCT_OFFSET(MonoLMF, previous_lmf));
4467
4468                 /*---------------------------------------------------------------*/
4469                 /* save method info                                              */
4470                 /*---------------------------------------------------------------*/
4471                 s390_basr  (code, s390_r1, 0);
4472                 s390_j     (code, 4);
4473                 s390_word  (code, method);
4474                 s390_l     (code, s390_r1, 0, s390_r1, 4);
4475                 s390_st    (code, s390_r1, 0, s390_r13,
4476                             G_STRUCT_OFFSET(MonoLMF, method));
4477
4478                 /*---------------------------------------------------------------*/
4479                 /* save the current IP                                           */
4480                 /*---------------------------------------------------------------*/
4481                 s390_st    (code, STK_BASE, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, ebp));
4482                 s390_basr  (code, s390_r1, 0);
4483                 s390_la    (code, s390_r1, 0, s390_r1, 0);
4484                 s390_st    (code, s390_r1, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, eip));
4485
4486                 /*---------------------------------------------------------------*/
4487                 /* Save general and floating point registers                     */
4488                 /*---------------------------------------------------------------*/
4489                 s390_stm   (code, s390_r2, s390_r12, s390_r13,
4490                             G_STRUCT_OFFSET(MonoLMF, gregs[2]));
4491                 for (i = 0; i < 16; i++) {
4492                         s390_std  (code, i, 0, s390_r13,
4493                                    G_STRUCT_OFFSET(MonoLMF, fregs[i]));
4494                 }
4495
4496                 /*---------------------------------------------------------------*/
4497                 /* Restore the parameter registers now that we've set up the lmf */
4498                 /*---------------------------------------------------------------*/
4499                 s390_lm    (code, s390_r2, s390_r6, s390_r13,
4500                             G_STRUCT_OFFSET(MonoLMF, pregs[0]));
4501         }
4502
4503         if (tracing)
4504                 code = mono_arch_instrument_prolog(cfg, enter_method, code, TRUE);
4505
4506         cfg->code_len = code - cfg->native_code;
4507
4508         return code;
4509 }
4510
4511 /*========================= End of Function ========================*/
4512
4513 /*------------------------------------------------------------------*/
4514 /*                                                                  */
4515 /* Name         - mono_arch_emit_epilog                             */
4516 /*                                                                  */
4517 /* Function     - Emit the instructions for a function epilog.      */
4518 /*                                                                  */
4519 /*------------------------------------------------------------------*/
4520
4521 void
4522 mono_arch_emit_epilog (MonoCompile *cfg)
4523 {
4524         MonoMethod *method = cfg->method;
4525         int tracing = 0;
4526         guint8 *code;
4527         int max_epilog_size = 96;
4528
4529         if (cfg->method->save_lmf)
4530                 max_epilog_size += 128;
4531
4532         if (mono_jit_trace_calls != NULL)
4533                 max_epilog_size += 128;
4534
4535         if (cfg->prof_options & MONO_PROFILE_ENTER_LEAVE)
4536                 max_epilog_size += 128;
4537
4538         while ((cfg->code_len + max_epilog_size) > (cfg->code_size - 16)) {
4539                 cfg->code_size  *= 2;
4540                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
4541                 mono_jit_stats.code_reallocs++;
4542         }
4543
4544         code = cfg->native_code + cfg->code_len;
4545
4546         if (mono_jit_trace_calls != NULL && mono_trace_eval (method)) {
4547                 code = mono_arch_instrument_epilog (cfg, leave_method, code, TRUE);
4548                 tracing = 1;
4549         }
4550
4551         if (method->save_lmf)
4552                 restoreLMF(code, cfg->frame_reg, cfg->stack_usage);
4553
4554         if (cfg->flags & MONO_CFG_HAS_ALLOCA)
4555                 s390_l (code, STK_BASE, 0, STK_BASE, 0);
4556         else
4557                 code = backUpStackPtr(cfg, code, STK_BASE);
4558
4559         s390_lm  (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
4560         s390_br  (code, s390_r14);
4561
4562         cfg->code_len = code - cfg->native_code;
4563
4564         g_assert (cfg->code_len < cfg->code_size);
4565
4566 }
4567
4568 /*========================= End of Function ========================*/
4569
4570 /*------------------------------------------------------------------*/
4571 /*                                                                  */
4572 /* Name         - mono_arch_emit_exceptions                         */
4573 /*                                                                  */
4574 /* Function     - Emit the blocks to handle exception conditions.   */
4575 /*                                                                  */
4576 /*------------------------------------------------------------------*/
4577
4578 void
4579 mono_arch_emit_exceptions (MonoCompile *cfg)
4580 {
4581         MonoJumpInfo    *patch_info;
4582         guint8          *code;
4583         int             nThrows = 0,
4584                         exc_count = 0,
4585                         iExc;
4586         guint32         code_size;
4587         MonoClass       *exc_classes [MAX_EXC];
4588         guint8          *exc_throw_start [MAX_EXC];
4589
4590         for (patch_info = cfg->patch_info;
4591              patch_info;
4592              patch_info = patch_info->next) {
4593                 if (patch_info->type == MONO_PATCH_INFO_EXC)
4594                         exc_count++;
4595         }
4596
4597         code_size = exc_count * 26;
4598
4599         while ((cfg->code_len + code_size) > (cfg->code_size - 16)) {
4600                 cfg->code_size  *= 2;
4601                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
4602                 mono_jit_stats.code_reallocs++;
4603         }
4604
4605         code = cfg->native_code + cfg->code_len;
4606
4607         /*---------------------------------------------------------------------*/
4608         /* Add code to raise exceptions                                        */
4609         /*---------------------------------------------------------------------*/
4610         for (patch_info = cfg->patch_info; patch_info; patch_info = patch_info->next) {
4611                 switch (patch_info->type) {
4612                 case MONO_PATCH_INFO_EXC: {
4613                         guint8 *ip = patch_info->ip.i + cfg->native_code;
4614                         MonoClass *exc_class;
4615                         guint32 throw_ip;
4616
4617                         /*-----------------------------------------------------*/
4618                         /* Patch the branch in epilog to come here             */
4619                         /*-----------------------------------------------------*/
4620                         s390_patch (ip + 2, (guint32) (S390_RELATIVE(code,ip)));
4621
4622                         exc_class = mono_class_from_name (mono_defaults.corlib,
4623                                                           "System",
4624                                                           patch_info->data.name);
4625                         g_assert (exc_class);
4626                         throw_ip = patch_info->ip.i;
4627
4628                         for (iExc = 0; iExc < nThrows; ++iExc)
4629                                 if (exc_classes [iExc] == exc_class)
4630                                         break;
4631
4632                         if (iExc < nThrows) {
4633                                 s390_jcl (code, S390_CC_UN, (guint32) exc_throw_start [iExc]);
4634                                 patch_info->type = MONO_PATCH_INFO_NONE;
4635                         } else {
4636
4637                                 if (nThrows < MAX_EXC) {
4638                                         exc_classes [nThrows]     = exc_class;
4639                                         exc_throw_start [nThrows] = code;
4640                                 }
4641
4642                                 /*---------------------------------------------*/
4643                                 /* Patch the parameter passed to the handler   */
4644                                 /*---------------------------------------------*/
4645                                 s390_basr (code, s390_r13, 0);
4646                                 s390_j    (code, 4);
4647                                 s390_word (code, patch_info->data.target);
4648                                 /*---------------------------------------------*/
4649                                 /* Load return address & parameter register    */
4650                                 /*---------------------------------------------*/
4651                                 s390_larl (code, s390_r14, (gsize)S390_RELATIVE((patch_info->ip.i +
4652                                                            cfg->native_code + 8), code));
4653                                 s390_l    (code, s390_r2, 0, s390_r13, 4);
4654                                 /*---------------------------------------------*/
4655                                 /* Reuse the current patch to set the jump     */
4656                                 /*---------------------------------------------*/
4657                                 patch_info->type      = MONO_PATCH_INFO_INTERNAL_METHOD;
4658                                 patch_info->data.name = "mono_arch_throw_exception_by_name";
4659                                 patch_info->ip.i      = code - cfg->native_code;
4660                                 s390_jcl  (code, S390_CC_UN, 0);
4661                         }
4662                         break;
4663                 }
4664                 default:
4665                         /* do nothing */
4666                         break;
4667                 }
4668         }
4669
4670         cfg->code_len = code - cfg->native_code;
4671
4672         g_assert (cfg->code_len < cfg->code_size);
4673
4674 }
4675
4676 /*========================= End of Function ========================*/
4677
4678 /*------------------------------------------------------------------*/
4679 /*                                                                  */
4680 /* Name         - mono_arch_setup_jit_tls_data                      */
4681 /*                                                                  */
4682 /* Function     - Setup the JIT's Thread Level Specific Data.       */
4683 /*                                                                  */
4684 /*------------------------------------------------------------------*/
4685
4686 void
4687 mono_arch_setup_jit_tls_data (MonoJitTlsData *tls)
4688 {
4689
4690         if (!tls_offset_inited) {
4691                 tls_offset_inited = TRUE;
4692
4693 #if HAVE_KW_THREAD
4694 # if 0
4695         __asm__ ("\tear\t%r1,0\n"
4696                  "\tlr\t%0,%3\n"
4697                  "\tsr\t%0,%r1\n"
4698                  "\tlr\t%1,%4\n"
4699                  "\tsr\t%1,%r1\n"
4700                  "\tlr\t%2,%5\n"
4701                  "\tsr\t%2,%r1\n"
4702                  : "=r" (appdomain_tls_offset),
4703                    "=r" (thread_tls_offset),
4704                    "=r" (lmf_tls_offset)
4705                  : "r" (&tls_appdomain),
4706                    "r" (&tls_current_object),
4707                    "r" (&mono_lmf_addr)
4708                  : "1", "cc");
4709 # endif
4710 #endif
4711         }
4712
4713         if (!lmf_addr_key_inited) {
4714                 lmf_addr_key_inited = TRUE;
4715                 pthread_key_create (&lmf_addr_key, NULL);
4716         }
4717         pthread_setspecific (lmf_addr_key, &tls->lmf);
4718
4719 }
4720
4721 /*========================= End of Function ========================*/
4722
4723 /*------------------------------------------------------------------*/
4724 /*                                                                  */
4725 /* Name         - mono_arch_free_jit_tls_data                       */
4726 /*                                                                  */
4727 /* Function     - Free tls data.                                    */
4728 /*                                                                  */
4729 /*------------------------------------------------------------------*/
4730
4731 void
4732 mono_arch_free_jit_tls_data (MonoJitTlsData *tls)
4733 {
4734
4735 }
4736
4737 /*========================= End of Function ========================*/
4738
4739 /*------------------------------------------------------------------*/
4740 /*                                                                  */
4741 /* Name         - mono_arch_emit_this_vret_args                     */
4742 /*                                                                  */
4743 /* Function     -                                                   */
4744 /*                                                                  */
4745 /*------------------------------------------------------------------*/
4746
4747 void
4748 mono_arch_emit_this_vret_args (MonoCompile *cfg, MonoCallInst *inst, int this_reg, int this_type, int vt_reg)
4749 {
4750         int this_dreg = s390_r2;
4751
4752         if (vt_reg != -1)
4753                 this_dreg = s390_r3;
4754
4755         /* add the this argument */
4756         if (this_reg != -1) {
4757                 MonoInst *this;
4758                 MONO_INST_NEW (cfg, this, OP_MOVE);
4759                 this->type  = this_type;
4760                 this->sreg1 = this_reg;
4761                 this->dreg  = mono_regstate_next_int (cfg->rs);
4762                 mono_bblock_add_inst (cfg->cbb, this);
4763                 mono_call_inst_add_outarg_reg (cfg, inst, this->dreg, this_dreg, FALSE);
4764         }
4765
4766         if (vt_reg != -1) {
4767                 MonoInst *vtarg;
4768                 MONO_INST_NEW (cfg, vtarg, OP_MOVE);
4769                 vtarg->type  = STACK_MP;
4770                 vtarg->sreg1 = vt_reg;
4771                 vtarg->dreg  = mono_regstate_next_int (cfg->rs);
4772                 mono_bblock_add_inst (cfg->cbb, vtarg);
4773                 mono_call_inst_add_outarg_reg (cfg, inst, vtarg->dreg, s390_r2, FALSE);
4774         }
4775 }
4776
4777 /*========================= End of Function ========================*/
4778
4779 /*------------------------------------------------------------------*/
4780 /*                                                                  */
4781 /* Name         - mono_arch_get_inst_for_method                   */
4782 /*                                                                  */
4783 /* Function     - Check for opcodes we can handle directly in       */
4784 /*                hardware.                                         */
4785 /*                                                                  */
4786 /*------------------------------------------------------------------*/
4787
4788 MonoInst*
4789 mono_arch_get_inst_for_method (MonoCompile *cfg, MonoMethod *cmethod,
4790                                MonoMethodSignature *fsig, MonoInst **args)
4791 {
4792         MonoInst *ins = NULL;
4793
4794         if (cmethod->klass == mono_defaults.math_class) {
4795                 if (strcmp (cmethod->name, "Sqrt") == 0) {
4796                         MONO_INST_NEW (cfg, ins, OP_SQRT);
4797                         ins->inst_i0 = args [0];
4798                 }
4799         }
4800
4801         return ins;
4802 }
4803
4804 /*========================= End of Function ========================*/
4805
4806 /*------------------------------------------------------------------*/
4807 /*                                                                  */
4808 /* Name         - mono_arch_print_tree                              */
4809 /*                                                                  */
4810 /* Function     - Print platform-specific opcode details.           */
4811 /*                                                                  */
4812 /* Returns      - 1 - opcode details have been printed              */
4813 /*                0 - opcode details have not been printed          */
4814 /*                                                                  */
4815 /*------------------------------------------------------------------*/
4816
4817 gboolean
4818 mono_arch_print_tree (MonoInst *tree, int arity)
4819 {
4820         gboolean done;
4821
4822         switch (tree->opcode) {
4823                 case OP_S390_LOADARG:
4824                 case OP_S390_ARGREG:
4825                 case OP_S390_ARGPTR:
4826                         printf ("[0x%lx(%s)]", tree->inst_offset,
4827                                 mono_arch_regname (tree->inst_basereg));
4828                         done = 1;
4829                         break;
4830                 case OP_S390_STKARG:
4831                         printf ("[0x%lx(previous_frame)]",
4832                                 tree->inst_offset);
4833                         done = 1;
4834                         break;
4835                 case OP_S390_MOVE:
4836                         printf ("[0x%lx(%d,%s),0x%lx(%s)]",
4837                                 tree->inst_offset, tree->backend.size,
4838                                 mono_arch_regname(tree->dreg), tree->inst_imm,
4839                                 mono_arch_regname(tree->sreg1));
4840                         done = 1;
4841                         break;
4842                 case OP_S390_SETF4RET:
4843                         printf ("[%s,%s]",
4844                                 mono_arch_fregname (tree->dreg),
4845                                 mono_arch_fregname (tree->sreg1));
4846                         done = 1;
4847                         break;
4848                 case OP_TLS_GET:
4849                         printf ("[0x%lx(0x%lx,%s)]", tree->inst_offset,
4850                                 tree->inst_imm,
4851                                 mono_arch_regname (tree->sreg1));
4852                         done = 1;
4853                         break;
4854                 case OP_S390_BKCHAIN:
4855                         printf ("[previous_frame(%s)]",
4856                                 mono_arch_regname (tree->sreg1));
4857                         done = 1;
4858                         break;
4859                 default:
4860                         done = 0;
4861         }
4862         return (done);
4863 }
4864
4865 /*========================= End of Function ========================*/
4866
4867 /*------------------------------------------------------------------*/
4868 /*                                                                  */
4869 /* Name         - mono_arch_regalloc_cost                           */
4870 /*                                                                  */
4871 /* Function     - Determine the cost, in the number of memory       */
4872 /*                references, of the action of allocating the var-  */
4873 /*                iable VMV into a register during global register  */
4874 /*                allocation.                                       */
4875 /*                                                                  */
4876 /* Returns      - Cost                                              */
4877 /*                                                                  */
4878 /*------------------------------------------------------------------*/
4879
4880 guint32
4881 mono_arch_regalloc_cost (MonoCompile *cfg, MonoMethodVar *vmv)
4882 {
4883         /* FIXME: */
4884         return 2;
4885 }
4886
4887 /*========================= End of Function ========================*/
4888
4889 /*------------------------------------------------------------------*/
4890 /*                                                                  */
4891 /* Name         - mono_arch_get_domain_intrinsic                    */
4892 /*                                                                  */
4893 /* Function     -                                                   */
4894 /*                                                                  */
4895 /* Returns      -                                                   */
4896 /*                                                                  */
4897 /*------------------------------------------------------------------*/
4898
4899 MonoInst *
4900 mono_arch_get_domain_intrinsic (MonoCompile* cfg)
4901 {
4902         MonoInst *ins;
4903
4904         if (appdomain_tls_offset == -1)
4905                 return NULL;
4906
4907         MONO_INST_NEW (cfg, ins, OP_TLS_GET);
4908         ins->inst_offset = appdomain_tls_offset;
4909         return (ins);
4910 }
4911
4912 /*========================= End of Function ========================*/
4913
4914 /*------------------------------------------------------------------*/
4915 /*                                                                  */
4916 /* Name         - mono_arch_get_thread_intrinsic                    */
4917 /*                                                                  */
4918 /* Function     -                                                   */
4919 /*                                                                  */
4920 /* Returns      -                                                   */
4921 /*                                                                  */
4922 /*------------------------------------------------------------------*/
4923
4924 MonoInst *
4925 mono_arch_get_thread_intrinsic (MonoCompile* cfg)
4926 {
4927         MonoInst *ins;
4928
4929         if (thread_tls_offset == -1)
4930                 return NULL;
4931
4932         MONO_INST_NEW (cfg, ins, OP_TLS_GET);
4933         ins->inst_offset = thread_tls_offset;
4934         return (ins);
4935 }
4936
4937 /*========================= End of Function ========================*/
4938
4939 /*------------------------------------------------------------------*/
4940 /*                                                                  */
4941 /* Name         - mono_arch_flush_register_windows                  */
4942 /*                                                                  */
4943 /* Function     -                                                   */
4944 /*                                                                  */
4945 /* Returns      -                                                   */
4946 /*                                                                  */
4947 /*------------------------------------------------------------------*/
4948
4949 void
4950 mono_arch_flush_register_windows (void)
4951 {
4952 }
4953
4954 /*========================= End of Function ========================*/
4955
4956 /*------------------------------------------------------------------*/
4957 /*                                                                  */
4958 /* Name         - mono_arch_get_lmf_addr                            */
4959 /*                                                                  */
4960 /* Function     -                                                   */
4961 /*                                                                  */
4962 /* Returns      -                                                   */
4963 /*                                                                  */
4964 /*------------------------------------------------------------------*/
4965
4966 gpointer
4967 mono_arch_get_lmf_addr (void)
4968 {
4969         return pthread_getspecific (lmf_addr_key);
4970 }
4971
4972
4973 /*========================= End of Function ========================*/
4974
4975 /*------------------------------------------------------------------*/
4976 /*                                                                  */
4977 /* Name         - mono_arch_get_patch_offset                        */
4978 /*                                                                  */
4979 /* Function     - Dummy entry point until s390x supports aot.       */
4980 /*                                                                  */
4981 /* Returns      - Offset for patch.                                 */
4982 /*                                                                  */
4983 /*------------------------------------------------------------------*/
4984
4985 guint32
4986 mono_arch_get_patch_offset (guint8 *code)
4987 {
4988         return 0;
4989 }
4990
4991 /*========================= End of Function ========================*/
4992
4993 gpointer
4994 mono_arch_context_get_int_reg (MonoContext *ctx, int reg)
4995 {
4996         /* FIXME: implement */
4997         g_assert_not_reached ();
4998         return NULL;
4999 }