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->inst_true_bb->native_offset) {                                         \
  24         int displace;                                                           \
  25         displace = ((cfg->native_code +                                         \
  26                     ins->inst_true_bb->native_offset) - 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_BB, ins->inst_true_bb);            \
  35         s390_jcl (code, cond, 0);                                               \
  36 }                                                                               \
  37 }
  38
  39 #define EMIT_UNCOND_BRANCH(ins)                                                         \
  40 {                                                                                       \
  41 if (ins->inst_target_bb->native_offset) {                                       \
  42         int displace;                                                           \
  43         displace = ((cfg->native_code +                                         \
  44                     ins->inst_target_bb->native_offset) - code) / 2;            \
  45         if (s390_is_imm16(displace)) {                                          \
  46                 s390_brc (code, S390_CC_UN, displace);                          \
  47         } else {                                                                \
  48                 s390_jcl (code, S390_CC_UN, displace);                          \
  49         }                                                                       \
  50 } else {                                                                        \
  51         mono_add_patch_info (cfg, code - cfg->native_code,                      \
  52                              MONO_PATCH_INFO_BB, ins->inst_target_bb);          \
  53         s390_jcl (code, S390_CC_UN, 0);                                         \
  54 }                                                                               \
  55 }
  56
  57 #define EMIT_COND_SYSTEM_EXCEPTION(cond,exc_name)                       \
  58         do {                                                            \
  59                 mono_add_patch_info (cfg, code - cfg->native_code,      \
  60                                     MONO_PATCH_INFO_EXC, exc_name);     \
  61                 s390_jcl (code, cond, 0);                               \
  62         } while (0);
  63
  64 #define CHECK_SRCDST_COM                                                \
  65         if (ins->dreg == ins->sreg2) {                                  \
  66                 src2 = ins->sreg1;                                      \
  67         } else {                                                        \
  68                 src2 = ins->sreg2;                                      \
  69                 if (ins->dreg != ins->sreg1) {                          \
  70                         s390_lr  (code, ins->dreg, ins->sreg1);         \
  71                 }                                                       \
  72         }
  73
  74 #define CHECK_SRCDST_NCOM                                               \
  75         if (ins->dreg == ins->sreg2) {                                  \
  76                 src2 = s390_r13;                                        \
  77                 s390_lr  (code, s390_r13, ins->sreg2);                  \
  78         } else {                                                        \
  79                 src2 = ins->sreg2;                                      \
  80         }                                                               \
  81         if (ins->dreg != ins->sreg1) {                                  \
  82                 s390_lr  (code, ins->dreg, ins->sreg1);                 \
  83         }
  84
  85 #define CHECK_SRCDST_COM_F                                              \
  86         if (ins->dreg == ins->sreg2) {                                  \
  87                 src2 = ins->sreg1;                                      \
  88         } else {                                                        \
  89                 src2 = ins->sreg2;                                      \
  90                 if (ins->dreg != ins->sreg1) {                          \
  91                         s390_ldr (code, ins->dreg, ins->sreg1);         \
  92                 }                                                       \
  93         }
  94
  95 #define CHECK_SRCDST_NCOM_F                                             \
  96         if (ins->dreg == ins->sreg2) {                                  \
  97                 src2 = s390_f15;                                        \
  98                 s390_ldr (code, s390_r13, ins->sreg2);                  \
  99         } else {                                                        \
 100                 src2 = ins->sreg2;                                      \
 101         }                                                               \
 102         if (ins->dreg != ins->sreg1) {                                  \
 103                 s390_ldr (code, ins->dreg, ins->sreg1);                 \
 104         }
 105
 106 #define MONO_EMIT_NEW_MOVE(cfg,dest,offset,src,imm,size) do {                   \
 107                 MonoInst *inst;                                                 \
 108                 int tmpr = 0;                                                   \
 109                 int sReg, dReg;                                                 \
 110                 MONO_INST_NEW (cfg, inst, OP_NOP);                                                              \
 111                 if (size > 256) {                                               \
 112                         tmpr = mono_alloc_preg (cfg); \
 113                         MONO_EMIT_NEW_ICONST(cfg,tmpr,size);                    \
 114                         inst->dreg        = dest;                               \
 115                         inst->inst_offset = offset;                             \
 116                         inst->sreg1       = src;                                \
 117                         inst->inst_imm    = imm;                                \
 118                         inst->sreg2       = tmpr;                               \
 119                 } else {                                                        \
 120                         if (s390_is_uimm12(offset)) {                           \
 121                                 inst->dreg        = dest;                       \
 122                                 inst->inst_offset = offset;                     \
 123                         } else {                                                \
 124                                 dReg = mono_alloc_preg (cfg); \
 125                                 MONO_EMIT_NEW_BIALU_IMM(cfg, OP_ADD_IMM,        \
 126                                         dReg, dest, offset);                    \
 127                                 inst->dreg        = dReg;                       \
 128                                 inst->inst_offset = 0;                          \
 129                         }                                                       \
 130                         if (s390_is_uimm12(imm)) {                              \
 131                                 inst->sreg1       = src;                        \
 132                                 inst->inst_imm    = imm;                        \
 133                         } else {                                                \
 134                                 sReg = mono_alloc_preg (cfg); \
 135                                 MONO_EMIT_NEW_BIALU_IMM(cfg, OP_ADD_IMM,        \
 136                                         sReg, src, imm);                        \
 137                                 inst->sreg1       = sReg;                       \
 138                                 inst->inst_imm    = 0;                          \
 139                         }                                                       \
 140                 }                                                               \
 141                 inst->opcode      = OP_S390_MOVE;                               \
 142                 inst->backend.size        = size;                                       \
 143         MONO_ADD_INS (cfg->cbb, inst); \
 144         } while (0)
 145
 146 #define MONO_OUTPUT_VTR(cfg, size, dr, sr, so) do {                             \
 147         int reg = mono_alloc_preg (cfg); \
 148         switch (size) {                                                         \
 149                 case 0:                                                         \
 150                         MONO_EMIT_NEW_ICONST(cfg, reg, 0);                      \
 151                         mono_call_inst_add_outarg_reg(cfg, call, reg, dr, FALSE);       \
 152                 break;                                                          \
 153                 case 1:                                                         \
 154                         MONO_EMIT_NEW_LOAD_MEMBASE_OP(cfg, OP_LOADU1_MEMBASE,   \
 155                                 reg, sr, so);                                   \
 156                         mono_call_inst_add_outarg_reg(cfg, call, reg, dr, FALSE);       \
 157                 break;                                                          \
 158                 case 2:                                                         \
 159                         MONO_EMIT_NEW_LOAD_MEMBASE_OP(cfg, OP_LOADU2_MEMBASE,   \
 160                                 reg, sr, so);                                   \
 161                         mono_call_inst_add_outarg_reg(cfg, call, reg, dr, FALSE);       \
 162                 break;                                                          \
 163                 case 4:                                                         \
 164                         MONO_EMIT_NEW_LOAD_MEMBASE_OP(cfg, OP_LOAD_MEMBASE,     \
 165                                 reg, sr, so);                                   \
 166                         mono_call_inst_add_outarg_reg(cfg, call, reg, dr, FALSE);       \
 167                 break;                                                          \
 168                 case 8:                                                         \
 169                         MONO_EMIT_NEW_LOAD_MEMBASE_OP(cfg, OP_LOAD_MEMBASE,     \
 170                                 reg, sr, so);                                   \
 171                         mono_call_inst_add_outarg_reg(cfg, call, reg, dr, FALSE);       \
 172                         reg = mono_alloc_preg (cfg); \
 173                         MONO_EMIT_NEW_LOAD_MEMBASE_OP(cfg, OP_LOAD_MEMBASE,     \
 174                                 reg, sr, so + sizeof (guint32));                                        \
 175                         mono_call_inst_add_outarg_reg(cfg, call, reg, dr + 1, FALSE);   \
 176                 break;                                                          \
 177         }                                                                       \
 178 } while (0)
 179
 180 #define MONO_OUTPUT_VTS(cfg, size, dr, dx, sr, so) do {                         \
 181         int tmpr;                                                               \
 182         switch (size) {                                                         \
 183                 case 0:                                                         \
 184                         tmpr = mono_alloc_preg (cfg); \
 185                         MONO_EMIT_NEW_ICONST(cfg, tmpr, 0);                     \
 186                         MONO_EMIT_NEW_STORE_MEMBASE(cfg, OP_STORE_MEMBASE_REG,  \
 187                                 dr, dx, tmpr);                                  \
 188                 break;                                                          \
 189                 case 1:                                                         \
 190                         tmpr = mono_alloc_preg (cfg); \
 191                         MONO_EMIT_NEW_LOAD_MEMBASE_OP(cfg, OP_LOADU1_MEMBASE,   \
 192                                 tmpr, sr, so);                                  \
 193                         MONO_EMIT_NEW_STORE_MEMBASE(cfg, OP_STORE_MEMBASE_REG,  \
 194                                 dr, dx, tmpr);                                  \
 195                 break;                                                          \
 196                 case 2:                                                         \
 197                         tmpr = mono_alloc_preg (cfg); \
 198                         MONO_EMIT_NEW_LOAD_MEMBASE_OP(cfg, OP_LOADU2_MEMBASE,   \
 199                                 tmpr, sr, so);                                  \
 200                         MONO_EMIT_NEW_STORE_MEMBASE(cfg, OP_STORE_MEMBASE_REG,  \
 201                                 dr, dx, tmpr);                                  \
 202                 break;                                                          \
 203                 case 4:                                                         \
 204                 case 8:                                                         \
 205                         MONO_EMIT_NEW_MOVE (cfg, dr, dx, sr, so, size);         \
 206                 break;                                                          \
 207         }                                                                       \
 208 } while (0)
 209
 210 #undef DEBUG
 211 #define DEBUG(a) if (cfg->verbose_level > 1) a
 212
 213 #define MAX_EXC 16
 214
 215 #define S390_TRACE_STACK_SIZE (5*sizeof(gint32)+3*sizeof(gdouble))
 216
 217 #define MAX (a, b) ((a) > (b) ? (a) : (b))
 218
 219 /*========================= End of Defines =========================*/
 220
 221 /*------------------------------------------------------------------*/
 222 /*                 I n c l u d e s                                  */
 223 /*------------------------------------------------------------------*/
 224
 225 #include "mini.h"
 226 #include <string.h>
 227
 228 #include <mono/metadata/appdomain.h>
 229 #include <mono/metadata/debug-helpers.h>
 230 #include <mono/metadata/profiler-private.h>
 231 #include <mono/utils/mono-math.h>
 232
 233 #include "mini-s390.h"
 234 #include "cpu-s390.h"
 235 #include "jit-icalls.h"
 236 #include "ir-emit.h"
 237
 238 /*========================= End of Includes ========================*/
 239
 240 /*------------------------------------------------------------------*/
 241 /*                 T y p e d e f s                                  */
 242 /*------------------------------------------------------------------*/
 243
 244 typedef struct {
 245         guint stack_size,
 246               local_size,
 247               code_size,
 248               parm_size,
 249               offset,
 250               offStruct,
 251               retStruct;
 252 } size_data;
 253
 254 /*------------------------------------------------------------------*/
 255 /* Used by the instrument_emit_epilog                               */
 256 /*------------------------------------------------------------------*/
 257
 258 enum {
 259         SAVE_NONE,
 260         SAVE_STRUCT,
 261         SAVE_ONE,
 262         SAVE_TWO,
 263         SAVE_R4,
 264         SAVE_R8
 265 };
 266
 267 typedef struct InstList InstList;
 268
 269 struct InstList {
 270         InstList *prev;
 271         InstList *next;
 272         MonoInst *data;
 273 };
 274
 275 typedef enum {
 276         RegTypeGeneral,
 277         RegTypeBase,
 278         RegTypeFP,
 279         RegTypeFPR4,
 280         RegTypeStructByVal,
 281         RegTypeStructByValInFP,
 282         RegTypeStructByAddr
 283 } ArgStorage;
 284
 285 typedef struct {
 286         gint32  offset;         /* offset from caller's stack */
 287         gint32  offparm;        /* offset from callee's stack */
 288         guint16 vtsize;         /* in param area */
 289         guint8  reg;
 290         ArgStorage regtype;             /* See RegType* */
 291         guint32 size;           /* Size of structure used by RegTypeStructByVal */
 292 } ArgInfo;
 293
 294 typedef struct {
 295         int nargs;
 296         int lastgr;
 297         guint32 stack_usage;
 298         guint32 struct_ret;
 299         ArgInfo ret;
 300         ArgInfo sigCookie;
 301         size_data sz;
 302         ArgInfo args [1];
 303 } CallInfo;
 304
 305 typedef struct {
 306         gint32  gr[5];          /* R2-R6                            */
 307         gdouble fp[3];          /* F0-F2                            */
 308 } __attribute__ ((packed)) RegParm;
 309
 310 /*========================= End of Typedefs ========================*/
 311
 312 /*------------------------------------------------------------------*/
 313 /*                   P r o t o t y p e s                            */
 314 /*------------------------------------------------------------------*/
 315
 316 static void indent (int);
 317 static guint8 * backUpStackPtr(MonoCompile *, guint8 *, gint);
 318 static void decodeParm (MonoType *, void *, int);
 319 static void enter_method (MonoMethod *, RegParm *, char *);
 320 static void leave_method (MonoMethod *, ...);
 321 static gboolean is_regsize_var (MonoType *);
 322 static inline void add_general (guint *, size_data *, ArgInfo *, gboolean);
 323 static inline void add_stackParm (guint *, size_data *, ArgInfo *, gint);
 324 static inline void add_float (guint *, size_data *, ArgInfo *);
 325 static CallInfo * get_call_info (MonoCompile *, MonoMemPool *, MonoMethodSignature *, gboolean);
 326 static guchar * emit_float_to_int (MonoCompile *, guchar *, int, int, int, gboolean);
 327 gpointer mono_arch_get_lmf_addr (void);
 328 static guint8 * emit_load_volatile_registers(guint8 *, MonoCompile *);
 329 static void emit_sig_cookie (MonoCompile *, MonoCallInst *, CallInfo *);
 330
 331 /*========================= End of Prototypes ======================*/
 332
 333 /*------------------------------------------------------------------*/
 334 /*                 G l o b a l   V a r i a b l e s                  */
 335 /*------------------------------------------------------------------*/
 336
 337 int mono_exc_esp_offset = 0;
 338
 339 static int indent_level = 0;
 340
 341 static gboolean tls_offset_inited = FALSE;
 342
 343 static int appdomain_tls_offset = -1,
 344            thread_tls_offset = -1;
 345
 346 pthread_key_t lmf_addr_key;
 347
 348 gboolean lmf_addr_key_inited = FALSE;
 349
 350 #if 0
 351
 352 extern __thread MonoDomain *tls_appdomain;
 353 extern __thread MonoThread *tls_current_object;
 354 extern __thread gpointer   mono_lmf_addr;
 355
 356 #endif
 357
 358 /*====================== End of Global Variables ===================*/
 359
 360 /*------------------------------------------------------------------*/
 361 /*                                                                  */
 362 /* Name         - mono_arch_regname                                 */
 363 /*                                                                  */
 364 /* Function     - Returns the name of the register specified by     */
 365 /*                the input parameter.                              */
 366 /*                                                                  */
 367 /*------------------------------------------------------------------*/
 368
 369 const char*
 370 mono_arch_regname (int reg) {
 371         static const char * rnames[] = {
 372                 "s390_r0", "s390_sp", "s390_r2", "s390_r3", "s390_r4",
 373                 "s390_r5", "s390_r6", "s390_r7", "s390_r8", "s390_r9",
 374                 "s390_r10", "s390_r11", "s390_r12", "s390_r13", "s390_r14",
 375                 "s390_r15"
 376         };
 377
 378         if (reg >= 0 && reg < 16)
 379                 return rnames [reg];
 380         else
 381                 return "unknown";
 382 }
 383
 384 /*========================= End of Function ========================*/
 385
 386 /*------------------------------------------------------------------*/
 387 /*                                                                  */
 388 /* Name         - mono_arch_fregname                                */
 389 /*                                                                  */
 390 /* Function     - Returns the name of the register specified by     */
 391 /*                the input parameter.                              */
 392 /*                                                                  */
 393 /*------------------------------------------------------------------*/
 394
 395 const char*
 396 mono_arch_fregname (int reg) {
 397         static const char * rnames[] = {
 398                 "s390_f0", "s390_f1", "s390_f2", "s390_f3", "s390_f4",
 399                 "s390_f5", "s390_f6", "s390_f7", "s390_f8", "s390_f9",
 400                 "s390_f10", "s390_f11", "s390_f12", "s390_f13", "s390_f14",
 401                 "s390_f15"
 402         };
 403
 404         if (reg >= 0 && reg < 16)
 405                 return rnames [reg];
 406         else
 407                 return "unknown";
 408 }
 409
 410 /*========================= End of Function ========================*/
 411
 412 /*------------------------------------------------------------------*/
 413 /*                                                                  */
 414 /* Name         - arch_get_argument_info                            */
 415 /*                                                                  */
 416 /* Function     - Gathers information on parameters such as size,   */
 417 /*                alignment, and padding. arg_info should be large  */
 418 /*                enough to hold param_count + 1 entries.           */
 419 /*                                                                  */
 420 /* Parameters   - @csig - Method signature                          */
 421 /*                @param_count - No. of parameters to consider      */
 422 /*                @arg_info - An array to store the result info     */
 423 /*                                                                  */
 424 /* Returns      - Size of the activation frame                      */
 425 /*                                                                  */
 426 /*------------------------------------------------------------------*/
 427
 428 int
 429 mono_arch_get_argument_info (MonoMethodSignature *csig,
 430                              int param_count,
 431                              MonoJitArgumentInfo *arg_info)
 432 {
 433         int k, frame_size = 0;
 434         int size, align, pad;
 435         int offset = 8;
 436
 437         if (MONO_TYPE_ISSTRUCT (csig->ret)) {
 438                 frame_size += sizeof (gpointer);
 439                 offset += 4;
 440         }
 441
 442         arg_info [0].offset = offset;
 443
 444         if (csig->hasthis) {
 445                 frame_size += sizeof (gpointer);
 446                 offset += 4;
 447         }
 448
 449         arg_info [0].size = frame_size;
 450
 451         for (k = 0; k < param_count; k++) {
 452
 453                 if (csig->pinvoke)
 454                         size = mono_type_native_stack_size (csig->params [k], &align);
 455                 else
 456                         size = mini_type_stack_size (NULL, csig->params [k], &align);
 457
 458                 frame_size += pad = (align - (frame_size & (align - 1))) & (align - 1);
 459                 arg_info [k].pad = pad;
 460                 frame_size += size;
 461                 arg_info [k + 1].pad = 0;
 462                 arg_info [k + 1].size = size;
 463                 offset += pad;
 464                 arg_info [k + 1].offset = offset;
 465                 offset += size;
 466         }
 467
 468         align = MONO_ARCH_FRAME_ALIGNMENT;
 469         frame_size += pad = (align - (frame_size & (align - 1))) & (align - 1);
 470         arg_info [k].pad = pad;
 471
 472         return frame_size;
 473 }
 474
 475 /*========================= End of Function ========================*/
 476
 477 /*------------------------------------------------------------------*/
 478 /*                                                                  */
 479 /* Name         - retFitsInReg.                                     */
 480 /*                                                                  */
 481 /* Function     - Determines if a value can be returned in one or   */
 482 /*                two registers.                                    */
 483 /*                                                                  */
 484 /*------------------------------------------------------------------*/
 485
 486 static inline gboolean
 487 retFitsInReg(guint32 size)
 488 {
 489         switch (size) {
 490                 case 0:
 491                 case 1:
 492                 case 2:
 493                 case 4:
 494                 case 8:
 495                         return (TRUE);
 496                 break;
 497                 default:
 498                         return (FALSE);
 499         }
 500 }
 501
 502 /*========================= End of Function ========================*/
 503
 504 /*------------------------------------------------------------------*/
 505 /*                                                                  */
 506 /* Name         - backStackPtr.                                     */
 507 /*                                                                  */
 508 /* Function     - Restore Stack Pointer to previous frame.          */
 509 /*                                                                  */
 510 /*------------------------------------------------------------------*/
 511
 512 static inline guint8 *
 513 backUpStackPtr(MonoCompile *cfg, guint8 *code, gint framePtr)
 514 {
 515         int stackSize = cfg->stack_usage;
 516
 517         if (s390_is_uimm16 (cfg->stack_usage)) {
 518                 s390_ahi  (code, framePtr, cfg->stack_usage);
 519         } else {
 520                 while (stackSize > 32767) {
 521                         s390_ahi  (code, framePtr, 32767);
 522                         stackSize -= 32767;
 523                 }
 524                 s390_ahi  (code, framePtr, stackSize);
 525         }
 526         return (code);
 527 }
 528
 529 /*========================= End of Function ========================*/
 530
 531 /*------------------------------------------------------------------*/
 532 /*                                                                  */
 533 /* Name         - indent                                            */
 534 /*                                                                  */
 535 /* Function     - Perform nice indenting to current level           */
 536 /*                                                                  */
 537 /*------------------------------------------------------------------*/
 538
 539 static void
 540 indent (int diff) {
 541         int v;
 542         if (diff < 0)
 543                 indent_level += diff;
 544         v = indent_level;
 545         printf("[%3d] ",v);
 546         while (v-- > 0) {
 547                 printf (". ");
 548         }
 549         if (diff > 0)
 550                 indent_level += diff;
 551 }
 552
 553 /*========================= End of Function ========================*/
 554
 555 /*------------------------------------------------------------------*/
 556 /*                                                                  */
 557 /* Name         - decodeParm                                        */
 558 /*                                                                  */
 559 /* Function     - Decode a parameter for the trace.                 */
 560 /*                                                                  */
 561 /*------------------------------------------------------------------*/
 562
 563 static void
 564 decodeParm(MonoType *type, void *curParm, int size)
 565 {
 566         guint32 simpleType;
 567
 568         if (type->byref) {
 569                 printf("[BYREF:%p], ", *((char **) curParm));
 570         } else {
 571                 simpleType = mono_type_get_underlying_type(type)->type;
 572 enum_parmtype:
 573                 switch (simpleType) {
 574                         case MONO_TYPE_I :
 575                                 printf ("[INTPTR:%p], ", *((int **) curParm));
 576                                 break;
 577                         case MONO_TYPE_U :
 578                                 printf ("[UINTPTR:%p], ", *((int **) curParm));
 579                                 break;
 580                         case MONO_TYPE_BOOLEAN :
 581                                 printf ("[BOOL:%d], ", *((int *) curParm));
 582                                 break;
 583                         case MONO_TYPE_CHAR :
 584                                 printf ("[CHAR:%c], ", *((int *) curParm));
 585                                 break;
 586                         case MONO_TYPE_I1 :
 587                                 printf ("[INT1:%d], ", *((int *) curParm));
 588                                 break;
 589                         case MONO_TYPE_I2 :
 590                                 printf ("[INT2:%d], ", *((int *) curParm));
 591                                 break;
 592                         case MONO_TYPE_I4 :
 593                                 printf ("[INT4:%d], ", *((int *) curParm));
 594                                 break;
 595                         case MONO_TYPE_U1 :
 596                                 printf ("[UINT1:%u], ", *((unsigned int *) curParm));
 597                                 break;
 598                         case MONO_TYPE_U2 :
 599                                 printf ("[UINT2:%u], ", *((guint16 *) curParm));
 600                                 break;
 601                         case MONO_TYPE_U4 :
 602                                 printf ("[UINT4:%u], ", *((guint32 *) curParm));
 603                                 break;
 604                         case MONO_TYPE_U8 :
 605                                 printf ("[UINT8:%llu], ", *((guint64 *) curParm));
 606                                 break;
 607                         case MONO_TYPE_STRING : {
 608                                 MonoString *s = *((MonoString **) curParm);
 609                                 if (s) {
 610                                         g_assert (((MonoObject *) s)->vtable->klass == mono_defaults.string_class);
 611                                         printf("[STRING:%p:%s], ", s, mono_string_to_utf8(s));
 612                                 } else {
 613                                         printf("[STRING:null], ");
 614                                 }
 615                                 break;
 616                         }
 617                         case MONO_TYPE_CLASS :
 618                         case MONO_TYPE_OBJECT : {
 619                                 MonoObject *obj = *((MonoObject **) curParm);
 620                                 MonoClass *class;
 621                                 if ((obj) && (obj->vtable)) {
 622                                         printf("[CLASS/OBJ:");
 623                                         class = obj->vtable->klass;
 624                                         printf("%p [%p] ",obj,curParm);
 625 //                                      if (class == mono_defaults.string_class) {
 626 //                                              printf("[STRING:%p:%s]",
 627 //                                                     *obj, mono_string_to_utf8 (obj));
 628 //                                      } else if (class == mono_defaults.int32_class) {
 629 //                                              printf("[INT32:%p:%d]",
 630 //                                                      obj, *(gint32 *)((char *)obj + sizeof (MonoObject)));
 631 //                                      } else
 632 //                                              printf("[%s.%s:%p]",
 633 //                                                     class->name_space, class->name, obj);
 634                                         printf("], ");
 635                                 } else {
 636                                         printf("[OBJECT:null], ");
 637                                 }
 638                                 break;
 639                         }
 640                         case MONO_TYPE_PTR :
 641                                 printf("[PTR:%p], ", *((gpointer **) (curParm)));
 642                                 break;
 643                         case MONO_TYPE_FNPTR :
 644                                 printf("[FNPTR:%p], ", *((gpointer **) (curParm)));
 645                                 break;
 646                         case MONO_TYPE_ARRAY :
 647                                 printf("[ARRAY:%p], ", *((gpointer **) (curParm)));
 648                                 break;
 649                         case MONO_TYPE_SZARRAY :
 650                                 printf("[SZARRAY:%p], ", *((gpointer **) (curParm)));
 651                                 break;
 652                         case MONO_TYPE_I8 :
 653                                 printf("[INT8:%lld], ", *((gint64 *) (curParm)));
 654                                 break;
 655                         case MONO_TYPE_R4 :
 656                                 printf("[FLOAT4:%g], ", *((double *) (curParm)));
 657                                 break;
 658                         case MONO_TYPE_R8 :
 659                                 printf("[FLOAT8:%g], ", *((double *) (curParm)));
 660                                 break;
 661                         case MONO_TYPE_VALUETYPE : {
 662                                 int i;
 663                                 MonoMarshalType *info;
 664
 665                                 if (type->data.klass->enumtype) {
 666                                         simpleType = mono_class_enum_basetype (type->data.klass)->type;
 667                                         printf("{VALUETYPE} - ");
 668                                         goto enum_parmtype;
 669                                 }
 670
 671                                 info = mono_marshal_load_type_info (type->data.klass);
 672
 673                                 if ((info->native_size == sizeof(float)) &&
 674                                     (info->num_fields  == 1) &&
 675                                     (info->fields[0].field->type->type == MONO_TYPE_R4)) {
 676                                                 printf("[FLOAT4:%f], ", *((float *) (curParm)));
 677                                         break;
 678                                 }
 679
 680                                 if ((info->native_size == sizeof(double)) &&
 681                                     (info->num_fields  == 1) &&
 682                                     (info->fields[0].field->type->type == MONO_TYPE_R8)) {
 683                                         printf("[FLOAT8:%g], ", *((double *) (curParm)));
 684                                         break;
 685                                 }
 686
 687                                 printf("[VALUETYPE:");
 688                                 for (i = 0; i < size; i++)
 689                                         printf("%02x,", *((guint8 *)curParm+i));
 690                                 printf("]");
 691                                 break;
 692                         }
 693                         case MONO_TYPE_TYPEDBYREF: {
 694                                 int i;
 695                                 printf("[TYPEDBYREF:");
 696                                 for (i = 0; i < size; i++)
 697                                         printf("%02x,", *((guint8 *)curParm+i));
 698                                 printf("]");
 699                                 break;
 700                         }
 701                         default :
 702                                 printf("[?? - %d], ",simpleType);
 703                 }
 704         }
 705 }
 706
 707 /*========================= End of Function ========================*/
 708
 709 //static int lc = 0;
 710
 711 /*------------------------------------------------------------------*/
 712 /*                                                                  */
 713 /* Name         - enter_method                                      */
 714 /*                                                                  */
 715 /* Function     - Perform tracing of the entry to the current       */
 716 /*                method.                                           */
 717 /*                                                                  */
 718 /*------------------------------------------------------------------*/
 719
 720 static void
 721 enter_method (MonoMethod *method, RegParm *rParm, char *sp)
 722 {
 723         int i, oParm = 0, iParm = 0;
 724         MonoObject *obj;
 725         MonoMethodSignature *sig;
 726         char *fname;
 727         guint32 ip;
 728         CallInfo *cinfo;
 729         ArgInfo *ainfo;
 730         void *curParm;
 731
 732         fname = mono_method_full_name (method, TRUE);
 733         indent (1);
 734         printf ("ENTER: %s(", fname);
 735         g_free (fname);
 736
 737         ip  = (*(guint32 *) (sp+S390_RET_ADDR_OFFSET)) & 0x7fffffff;
 738         printf (") ip: %p sp: %p - ", (gpointer) ip, sp);
 739
 740         if (rParm == NULL)
 741                 return;
 742
 743         sig = mono_method_signature (method);
 744
 745         cinfo = get_call_info (NULL, NULL, sig, sig->pinvoke);
 746
 747         if (cinfo->struct_ret) {
 748                 printf ("[STRUCTRET:%p], ", (gpointer) rParm->gr[0]);
 749                 iParm = 1;
 750         }
 751
 752         if (sig->hasthis) {
 753                 gpointer *this = (gpointer *) rParm->gr[iParm];
 754                 obj = (MonoObject *) this;
 755                 if (method->klass->valuetype) {
 756                         if (obj) {
 757                                 printf("this:[value:%p:%08x], ",
 758                                        this, *((guint32 *)(this+sizeof(MonoObject))));
 759                         } else
 760                                 printf ("this:[NULL], ");
 761                 } else {
 762                         if (obj) {
 763 //                              class = obj->vtable->klass;
 764 //                              if (class == mono_defaults.string_class) {
 765 //                                      printf ("this:[STRING:%p:%s], ",
 766 //                                              obj, mono_string_to_utf8 ((MonoString *)obj));
 767 //                              } else {
 768 //                                      printf ("this:%p[%s.%s], ",
 769 //                                              obj, class->name_space, class->name);
 770 //                              }
 771 printf("this:%p, ",obj);
 772                         } else
 773                                 printf ("this:NULL, ");
 774                 }
 775                 oParm++;
 776         }
 777
 778         for (i = 0; i < sig->param_count; ++i) {
 779                 ainfo = &cinfo->args[i + oParm];
 780                 switch (ainfo->regtype) {
 781                         case RegTypeGeneral :
 782                                 decodeParm(sig->params[i], &(rParm->gr[ainfo->reg-2]), ainfo->size);
 783                                 break;
 784                         case RegTypeFP :
 785                                 decodeParm(sig->params[i], &(rParm->fp[ainfo->reg]), ainfo->size);
 786                                 break;
 787                         case RegTypeBase :
 788                                 decodeParm(sig->params[i], sp+ainfo->offset, ainfo->size);
 789                                 break;
 790                         case RegTypeStructByVal :
 791                                 if (ainfo->reg != STK_BASE)
 792                                         curParm = &(rParm->gr[ainfo->reg-2]);
 793                                 else
 794                                         curParm = sp+ainfo->offset;
 795
 796                                 if (retFitsInReg (ainfo->vtsize))
 797                                         decodeParm(sig->params[i],
 798                                                    curParm,
 799                                                    ainfo->size);
 800                                 else
 801                                         decodeParm(sig->params[i],
 802                                                    *((char **) curParm),
 803                                                    ainfo->vtsize);
 804                                 break;
 805                         case RegTypeStructByAddr :
 806                                 if (ainfo->reg != STK_BASE)
 807                                         curParm = &(rParm->gr[ainfo->reg-2]);
 808                                 else
 809                                         curParm = sp+ainfo->offset;
 810
 811                                 decodeParm(sig->params[i],
 812                                            *((char **) curParm),
 813                                            ainfo->vtsize);
 814                                 break;
 815
 816                         default :
 817                                 printf("???, ");
 818                 }
 819         }
 820         printf("\n");
 821         g_free(cinfo);
 822 }
 823
 824 /*========================= End of Function ========================*/
 825
 826 /*------------------------------------------------------------------*/
 827 /*                                                                  */
 828 /* Name         - leave_method                                      */
 829 /*                                                                  */
 830 /* Function     -                                                   */
 831 /*                                                                  */
 832 /*------------------------------------------------------------------*/
 833
 834 static void
 835 leave_method (MonoMethod *method, ...)
 836 {
 837         MonoType *type;
 838         char *fname;
 839         guint32 ip;
 840         va_list ap;
 841
 842         va_start(ap, method);
 843
 844         fname = mono_method_full_name (method, TRUE);
 845         indent (-1);
 846         printf ("LEAVE: %s", fname);
 847         g_free (fname);
 848
 849         type = mono_method_signature (method)->ret;
 850
 851 handle_enum:
 852         switch (type->type) {
 853         case MONO_TYPE_VOID:
 854                 break;
 855         case MONO_TYPE_BOOLEAN: {
 856                 int val = va_arg (ap, int);
 857                 if (val)
 858                         printf ("[TRUE:%d]", val);
 859                 else
 860                         printf ("[FALSE]");
 861
 862                 break;
 863         }
 864         case MONO_TYPE_CHAR: {
 865                 int val = va_arg (ap, int);
 866                 printf ("[CHAR:%d]", val);
 867                 break;
 868         }
 869         case MONO_TYPE_I1: {
 870                 int val = va_arg (ap, int);
 871                 printf ("[INT1:%d]", val);
 872                 break;
 873         }
 874         case MONO_TYPE_U1: {
 875                 int val = va_arg (ap, int);
 876                 printf ("[UINT1:%d]", val);
 877                 break;
 878         }
 879         case MONO_TYPE_I2: {
 880                 int val = va_arg (ap, int);
 881                 printf ("[INT2:%d]", val);
 882                 break;
 883         }
 884         case MONO_TYPE_U2: {
 885                 int val = va_arg (ap, int);
 886                 printf ("[UINT2:%d]", val);
 887                 break;
 888         }
 889         case MONO_TYPE_I4: {
 890                 int val = va_arg (ap, int);
 891                 printf ("[INT4:%d]", val);
 892                 break;
 893         }
 894         case MONO_TYPE_U4: {
 895                 int val = va_arg (ap, int);
 896                 printf ("[UINT4:%d]", val);
 897                 break;
 898         }
 899         case MONO_TYPE_I: {
 900                 int val = va_arg (ap, int);
 901                 printf ("[INT:%d]", val);
 902                 printf("]");
 903                 break;
 904         }
 905         case MONO_TYPE_U: {
 906                 int val = va_arg (ap, int);
 907                 printf ("[UINT:%d]", val);
 908                 printf("]");
 909                 break;
 910         }
 911         case MONO_TYPE_STRING: {
 912                 MonoString *s = va_arg (ap, MonoString *);
 913 ;
 914                 if (s) {
 915                         g_assert (((MonoObject *)s)->vtable->klass == mono_defaults.string_class);
 916                         printf ("[STRING:%p:%s]", s, mono_string_to_utf8 (s));
 917                 } else
 918                         printf ("[STRING:null], ");
 919                 break;
 920         }
 921         case MONO_TYPE_CLASS:
 922         case MONO_TYPE_OBJECT: {
 923                 MonoObject *o = va_arg (ap, MonoObject *);
 924
 925 //              if ((o) && (o->vtable)) {
 926 //                      if (o->vtable->klass == mono_defaults.boolean_class) {
 927 //                              printf ("[BOOLEAN:%p:%d]", o, *((guint8 *)o + sizeof (MonoObject)));
 928 //                      } else if  (o->vtable->klass == mono_defaults.int32_class) {
 929 //                              printf ("[INT32:%p:%d]", o, *((gint32 *)((char *)o + sizeof (MonoObject))));
 930 //                      } else if  (o->vtable->klass == mono_defaults.int64_class) {
 931 //                              printf ("[INT64:%p:%lld]", o, *((gint64 *)((char *)o + sizeof (MonoObject))));
 932 //                      } else
 933 //                              printf ("[%s.%s:%p]", o->vtable->klass->name_space, o->vtable->klass->name, o);
 934 //              } else
 935                         printf ("[OBJECT:%p]", o);
 936
 937                 break;
 938         }
 939         case MONO_TYPE_PTR:
 940         case MONO_TYPE_FNPTR:
 941         case MONO_TYPE_ARRAY:
 942         case MONO_TYPE_SZARRAY: {
 943                 gpointer p = va_arg (ap, gpointer);
 944                 printf ("[result=%p]", p);
 945                 break;
 946         }
 947         case MONO_TYPE_I8: {
 948                 gint64 l =  va_arg (ap, gint64);
 949                 printf ("[LONG:%lld]", l);
 950                 break;
 951         }
 952         case MONO_TYPE_U8: {
 953                 guint64 l =  va_arg (ap, guint64);
 954                 printf ("[ULONG:%llu]", l);
 955                 break;
 956         }
 957         case MONO_TYPE_R4: {
 958                 double f;
 959                 f = va_arg (ap, double);
 960                 printf ("[FLOAT4:%g]\n", f);
 961                 break;
 962         }
 963         case MONO_TYPE_R8: {
 964                 double f = va_arg (ap, double);
 965                 printf ("[FLOAT8:%g]\n", f);
 966                 break;
 967         }
 968         case MONO_TYPE_VALUETYPE: {
 969                 MonoMarshalType *info;
 970                 if (type->data.klass->enumtype) {
 971                         type = mono_class_enum_basetype (type->data.klass);
 972                         goto handle_enum;
 973                 } else {
 974                         guint8 *p = va_arg (ap, gpointer);
 975                         int j, size, align;
 976
 977                         info = mono_marshal_load_type_info (type->data.klass);
 978
 979                         if ((info->native_size == sizeof(float)) &&
 980                             (info->num_fields  == 1) &&
 981                             (info->fields[0].field->type->type == MONO_TYPE_R4)) {
 982                                 double f = va_arg (ap, double);
 983                                 printf("[FLOAT4:%g]\n", (double) f);
 984                                 break;
 985                         }
 986
 987                         if ((info->native_size == sizeof(double)) &&
 988                             (info->num_fields  == 1) &&
 989                             (info->fields[0].field->type->type == MONO_TYPE_R8)) {
 990                                 double f = va_arg (ap, double);
 991                                 printf("[FLOAT8:%g]\n", f);
 992                                 break;
 993                         }
 994
 995                         size = mono_type_size (type, &align);
 996                         switch (size) {
 997                         case 1:
 998                         case 2:
 999                         case 4:
1000                         case 8:
1001                                 printf ("[");
1002                                 for (j = 0; p && j < size; j++)
1003                                         printf ("%02x,", p [j]);
1004                                 printf ("]\n");
1005                                 break;
1006                         default:
1007                                 printf ("[VALUERET]\n");
1008                         }
1009                 }
1010                 break;
1011         }
1012         case MONO_TYPE_TYPEDBYREF: {
1013                 guint8 *p = va_arg (ap, gpointer);
1014                 int j, size, align;
1015                 size = mono_type_size (type, &align);
1016                 switch (size) {
1017                 case 1:
1018                 case 2:
1019                 case 4:
1020                 case 8:
1021                         printf ("[");
1022                         for (j = 0; p && j < size; j++)
1023                                 printf ("%02x,", p [j]);
1024                         printf ("]\n");
1025                         break;
1026                 default:
1027                         printf ("[TYPEDBYREF]\n");
1028                 }
1029         }
1030                 break;
1031         default:
1032                 printf ("(unknown return type %x)",
1033                         mono_method_signature (method)->ret->type);
1034         }
1035
1036         ip = ((gint32) __builtin_return_address (0)) & 0x7fffffff;
1037         printf (" ip: %p\n", (gpointer) ip);
1038 }
1039
1040 /*========================= End of Function ========================*/
1041
1042 /*------------------------------------------------------------------*/
1043 /*                                                                  */
1044 /* Name         - mono_arch_cpu_init                                */
1045 /*                                                                  */
1046 /* Function     - Perform CPU specific initialization to execute    */
1047 /*                managed code.                                     */
1048 /*                                                                  */
1049 /*------------------------------------------------------------------*/
1050
1051 void
1052 mono_arch_cpu_init (void)
1053 {
1054         guint mode = 1;
1055
1056         /*--------------------------------------*/
1057         /* Set default rounding mode for FP     */
1058         /*--------------------------------------*/
1059         __asm__ ("SRNM\t%0\n\t"
1060                 : : "m" (mode));
1061 }
1062
1063 /*========================= End of Function ========================*/
1064
1065
1066 /*
1067  * Initialize architecture specific code.
1068  */
1069 void
1070 mono_arch_init (void)
1071 {
1072 }
1073
1074 /*
1075  * Cleanup architecture specific code.
1076  */
1077 void
1078 mono_arch_cleanup (void)
1079 {
1080 }
1081
1082 /*------------------------------------------------------------------*/
1083 /*                                                                  */
1084 /* Name         - mono_arch_cpu_optimizazions                       */
1085 /*                                                                  */
1086 /* Function     - Returns the optimizations supported on this CPU   */
1087 /*                                                                  */
1088 /*------------------------------------------------------------------*/
1089
1090 guint32
1091 mono_arch_cpu_optimizazions (guint32 *exclude_mask)
1092 {
1093         guint32 opts = 0;
1094
1095         /*----------------------------------------------------------*/
1096         /* no s390-specific optimizations yet                       */
1097         /*----------------------------------------------------------*/
1098         *exclude_mask = MONO_OPT_INLINE|MONO_OPT_LINEARS;
1099 //      *exclude_mask = MONO_OPT_INLINE;
1100         return opts;
1101 }
1102
1103 /*========================= End of Function ========================*/
1104
1105 /*------------------------------------------------------------------*/
1106 /*                                                                  */
1107 /* Name         -                                                   */
1108 /*                                                                  */
1109 /* Function     -                                                   */
1110 /*                                                                  */
1111 /*------------------------------------------------------------------*/
1112
1113 static gboolean
1114 is_regsize_var (MonoType *t) {
1115         if (t->byref)
1116                 return TRUE;
1117         switch (mono_type_get_underlying_type (t)->type) {
1118         case MONO_TYPE_I4:
1119         case MONO_TYPE_U4:
1120         case MONO_TYPE_I:
1121         case MONO_TYPE_U:
1122         case MONO_TYPE_PTR:
1123         case MONO_TYPE_FNPTR:
1124                 return TRUE;
1125         case MONO_TYPE_OBJECT:
1126         case MONO_TYPE_STRING:
1127         case MONO_TYPE_CLASS:
1128         case MONO_TYPE_SZARRAY:
1129         case MONO_TYPE_ARRAY:
1130                 return FALSE;
1131         case MONO_TYPE_VALUETYPE:
1132                 if (t->data.klass->enumtype)
1133                         return is_regsize_var (mono_class_enum_basetype (t->data.klass));
1134                 return FALSE;
1135         }
1136         return FALSE;
1137 }
1138
1139 /*========================= End of Function ========================*/
1140
1141 /*------------------------------------------------------------------*/
1142 /*                                                                  */
1143 /* Name         - mono_arch_get_allocatable_int_vars                */
1144 /*                                                                  */
1145 /* Function     -                                                   */
1146 /*                                                                  */
1147 /*------------------------------------------------------------------*/
1148
1149 GList *
1150 mono_arch_get_allocatable_int_vars (MonoCompile *cfg)
1151 {
1152         GList *vars = NULL;
1153         int i;
1154
1155         for (i = 0; i < cfg->num_varinfo; i++) {
1156                 MonoInst *ins = cfg->varinfo [i];
1157                 MonoMethodVar *vmv = MONO_VARINFO (cfg, i);
1158
1159                 /* unused vars */
1160                 if (vmv->range.first_use.abs_pos >= vmv->range.last_use.abs_pos)
1161                         continue;
1162
1163                 if (ins->flags & (MONO_INST_VOLATILE|MONO_INST_INDIRECT) ||
1164                     (ins->opcode != OP_LOCAL && ins->opcode != OP_ARG))
1165                         continue;
1166
1167                 /* we can only allocate 32 bit values */
1168                 if (is_regsize_var (ins->inst_vtype)) {
1169                         g_assert (MONO_VARINFO (cfg, i)->reg == -1);
1170                         g_assert (i == vmv->idx);
1171                         vars = mono_varlist_insert_sorted (cfg, vars, vmv, FALSE);
1172                 }
1173         }
1174
1175         return vars;
1176 }
1177
1178 /*========================= End of Function ========================*/
1179
1180 /*------------------------------------------------------------------*/
1181 /*                                                                  */
1182 /* Name         - mono_arch_global_int_regs                         */
1183 /*                                                                  */
1184 /* Function     - Return a list of usable integer registers.        */
1185 /*                                                                  */
1186 /*------------------------------------------------------------------*/
1187
1188 GList *
1189 mono_arch_get_global_int_regs (MonoCompile *cfg)
1190 {
1191         GList *regs = NULL;
1192         MonoMethodHeader *header;
1193         int i, top = 13;
1194
1195         header = mono_method_get_header (cfg->method);
1196         if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
1197                 cfg->frame_reg = s390_r11;
1198
1199         /* FIXME: s390_r12 is reserved for bkchain_reg. Only reserve it if needed */
1200         top = 12;
1201         for (i = 8; i < top; ++i) {
1202                 if (cfg->frame_reg != i)
1203                         regs = g_list_prepend (regs, GUINT_TO_POINTER (i));
1204         }
1205
1206         return regs;
1207 }
1208
1209 /*========================= End of Function ========================*/
1210
1211 /*------------------------------------------------------------------*/
1212 /*                                                                  */
1213 /* Name         -  mono_arch_flush_icache                           */
1214 /*                                                                  */
1215 /* Function     -  Flush the CPU icache.                            */
1216 /*                                                                  */
1217 /*------------------------------------------------------------------*/
1218
1219 void
1220 mono_arch_flush_icache (guint8 *code, gint size)
1221 {
1222 }
1223
1224 /*========================= End of Function ========================*/
1225
1226 /*------------------------------------------------------------------*/
1227 /*                                                                  */
1228 /* Name         -  mono_arch_is_inst_imm                                */
1229 /*                                                                  */
1230 /*------------------------------------------------------------------*/
1231
1232 gboolean
1233 mono_arch_is_inst_imm (gint64 imm)
1234 {
1235         /* The lowering pass will take care of it */
1236         return TRUE;
1237 }
1238
1239 /*========================= End of Function ========================*/
1240
1241 /*------------------------------------------------------------------*/
1242 /*                                                                  */
1243 /* Name         - add_general                                       */
1244 /*                                                                  */
1245 /* Function     - Determine code and stack size incremements for a  */
1246 /*                parameter.                                        */
1247 /*                                                                  */
1248 /*------------------------------------------------------------------*/
1249
1250 static void inline
1251 add_general (guint *gr, size_data *sz, ArgInfo *ainfo, gboolean simple)
1252 {
1253         int disp;
1254
1255         if (simple) {
1256                 if (*gr > S390_LAST_ARG_REG) {
1257                         sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1258                         ainfo->offset   = sz->stack_size;
1259                         ainfo->reg      = STK_BASE;
1260                         ainfo->regtype  = RegTypeBase;
1261                         sz->stack_size += sizeof(int);
1262                         sz->local_size += sizeof(int);
1263                         sz->offStruct  += sizeof(int);
1264                         sz->code_size  += 12;
1265                 } else {
1266                         ainfo->reg      = *gr;
1267                         sz->code_size  += 8;
1268                 }
1269         } else {
1270                 if (*gr > S390_LAST_ARG_REG - 1) {
1271                         disp            = sz->stack_size;
1272                         sz->stack_size  = S390_ALIGN(sz->stack_size, S390_STACK_ALIGNMENT);
1273                         disp            = sz->stack_size - disp;
1274                         ainfo->offset   = sz->stack_size;
1275                         ainfo->reg      = STK_BASE;
1276                         ainfo->regtype  = RegTypeBase;
1277                         sz->stack_size += sizeof(long long);
1278                         sz->local_size += (sizeof(long long) + disp);
1279                         sz->offStruct  += (sizeof(long long) + disp);
1280                         sz->code_size  += 10;
1281                 } else {
1282                         ainfo->reg      = *gr;
1283                         sz->code_size  += 8;
1284                 }
1285                 (*gr) ++;
1286         }
1287         (*gr) ++;
1288 }
1289
1290 /*========================= End of Function ========================*/
1291
1292 /*------------------------------------------------------------------*/
1293 /*                                                                  */
1294 /* Name         - add_stackParm                                     */
1295 /*                                                                  */
1296 /* Function     - Determine code and stack size incremements for a  */
1297 /*                parameter.                                        */
1298 /*                                                                  */
1299 /*------------------------------------------------------------------*/
1300
1301 static void inline
1302 add_stackParm (guint *gr, size_data *sz, ArgInfo *ainfo, gint size)
1303 {
1304         if (*gr > S390_LAST_ARG_REG) {
1305                 sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1306                 ainfo->reg          = STK_BASE;
1307                 ainfo->offset   = sz->stack_size;
1308                 sz->stack_size += sizeof (gpointer);
1309                 sz->parm_size  += sizeof(gpointer);
1310                 sz->offStruct  += sizeof(gpointer);
1311         } else {
1312                 ainfo->reg      = *gr;
1313                 ainfo->offset   = sz->stack_size;
1314         }
1315         (*gr) ++;
1316         ainfo->offparm  = sz->offset;
1317         sz->offset      = S390_ALIGN(sz->offset+size, sizeof(long));
1318         ainfo->size     = size;
1319         ainfo->regtype  = RegTypeStructByAddr;
1320         ainfo->vtsize   = size;
1321         sz->parm_size  += size;
1322 }
1323
1324 /*========================= End of Function ========================*/
1325
1326 /*------------------------------------------------------------------*/
1327 /*                                                                  */
1328 /* Name         - add_float                                         */
1329 /*                                                                  */
1330 /* Function     - Determine code and stack size incremements for a  */
1331 /*                float parameter.                                  */
1332 /*                                                                  */
1333 /*------------------------------------------------------------------*/
1334
1335 static void inline
1336 add_float (guint *fr,  size_data *sz, ArgInfo *ainfo)
1337 {
1338         if ((*fr) <= S390_LAST_FPARG_REG) {
1339                 ainfo->regtype = RegTypeFP;
1340                 ainfo->reg     = *fr;
1341                 sz->code_size += 4;
1342                 (*fr) += 2;
1343         }
1344         else {
1345                 ainfo->offset   = sz->stack_size;
1346                 ainfo->reg      = STK_BASE;
1347                 ainfo->regtype  = RegTypeBase;
1348                 sz->code_size  += 4;
1349                 sz->stack_size += ainfo->size;
1350                 sz->local_size += ainfo->size;
1351                 sz->offStruct  += ainfo->size;
1352         }
1353 }
1354
1355 /*========================= End of Function ========================*/
1356
1357 /*------------------------------------------------------------------*/
1358 /*                                                                  */
1359 /* Name         - get_call_info                                         */
1360 /*                                                                  */
1361 /* Function     - Determine the amount of space required for code   */
1362 /*                and stack. In addition determine starting points  */
1363 /*                for stack-based parameters, and area for struct-  */
1364 /*                ures being returned on the stack.                 */
1365 /*                                                                  */
1366 /*------------------------------------------------------------------*/
1367
1368 static CallInfo *
1369 get_call_info (MonoCompile *cfg, MonoMemPool *mp, MonoMethodSignature *sig, gboolean is_pinvoke)
1370 {
1371         guint i, fr, gr, size;
1372         int nParm = sig->hasthis + sig->param_count;
1373         MonoType *ret_type;
1374         guint32 simpletype, align;
1375         CallInfo *cinfo;
1376         size_data *sz;
1377         MonoGenericSharingContext *gsctx = cfg ? cfg->generic_sharing_context : NULL;
1378
1379         if (mp)
1380                 cinfo = mono_mempool_alloc0 (mp, sizeof (CallInfo) + sizeof (ArgInfo) * nParm);
1381         else
1382                 cinfo = g_malloc0 (sizeof (CallInfo) + sizeof (ArgInfo) * nParm);
1383
1384         fr                = 0;
1385         gr                = s390_r2;
1386         nParm                 = 0;
1387         cinfo->struct_ret = 0;
1388         sz                = &cinfo->sz;
1389         sz->offset            = 0;
1390         sz->offStruct     = S390_MINIMAL_STACK_SIZE;
1391         sz->retStruct     = 0;
1392         sz->stack_size    = S390_MINIMAL_STACK_SIZE;
1393         sz->code_size     = 0;
1394         sz->parm_size     = 0;
1395         sz->local_size    = 0;
1396
1397         /*----------------------------------------------------------*/
1398         /* We determine the size of the return code/stack in case we*/
1399         /* need to reserve a register to be used to address a stack */
1400         /* area that the callee will use.                           */
1401         /*----------------------------------------------------------*/
1402
1403         ret_type = mono_type_get_underlying_type (sig->ret);
1404         ret_type = mini_get_basic_type_from_generic (gsctx, ret_type);
1405         simpletype = ret_type->type;
1406 enum_retvalue:
1407         switch (simpletype) {
1408                 case MONO_TYPE_BOOLEAN:
1409                 case MONO_TYPE_I1:
1410                 case MONO_TYPE_U1:
1411                 case MONO_TYPE_I2:
1412                 case MONO_TYPE_U2:
1413                 case MONO_TYPE_CHAR:
1414                 case MONO_TYPE_I4:
1415                 case MONO_TYPE_U4:
1416                 case MONO_TYPE_I:
1417                 case MONO_TYPE_U:
1418                 case MONO_TYPE_CLASS:
1419                 case MONO_TYPE_OBJECT:
1420                 case MONO_TYPE_SZARRAY:
1421                 case MONO_TYPE_ARRAY:
1422                 case MONO_TYPE_PTR:
1423                 case MONO_TYPE_FNPTR:
1424                 case MONO_TYPE_STRING:
1425                         cinfo->ret.reg = s390_r2;
1426                         sz->code_size += 4;
1427                         break;
1428                 case MONO_TYPE_R4:
1429                 case MONO_TYPE_R8:
1430                         cinfo->ret.reg = s390_f0;
1431                         sz->code_size += 4;
1432                         break;
1433                 case MONO_TYPE_I8:
1434                 case MONO_TYPE_U8:
1435                         cinfo->ret.reg = s390_r2;
1436                         sz->code_size += 4;
1437                         break;
1438                 case MONO_TYPE_GENERICINST:
1439                         if (!mono_type_generic_inst_is_valuetype (sig->ret)) {
1440                                 cinfo->ret.reg = s390_r2;
1441                                 sz->code_size += 4;
1442                                 break;
1443                         }
1444                         /* Fall through */
1445                 case MONO_TYPE_VALUETYPE: {
1446                         MonoClass *klass = mono_class_from_mono_type (sig->ret);
1447                         if (klass->enumtype) {
1448                                 simpletype = mono_class_enum_basetype (klass)->type;
1449                                 goto enum_retvalue;
1450                         }
1451                         if (sig->pinvoke)
1452                                 size = mono_class_native_size (klass, &align);
1453                         else
1454                                 size = mono_class_value_size (klass, &align);
1455
1456                         cinfo->ret.reg    = s390_r2;
1457                         cinfo->struct_ret = 1;
1458                         cinfo->ret.size   = size;
1459                         cinfo->ret.vtsize = size;
1460                         gr++;
1461                         break;
1462                 }
1463                 case MONO_TYPE_TYPEDBYREF:
1464                         size = sizeof (MonoTypedRef);
1465                         cinfo->ret.reg    = s390_r2;
1466                         cinfo->struct_ret = 1;
1467                         cinfo->ret.size   = size;
1468                         cinfo->ret.vtsize = size;
1469                         gr++;
1470                         break;
1471                 case MONO_TYPE_VOID:
1472                         break;
1473                 default:
1474                         g_error ("mini-s390: cannot handle as return value 0x%x (0x%x)", sig->ret->type,simpletype);
1475         }
1476
1477         if (sig->hasthis) {
1478                 add_general (&gr, sz, cinfo->args+nParm, TRUE);
1479                 cinfo->args[nParm].size = sizeof(gpointer);
1480                 nParm++;
1481         }
1482
1483         /*----------------------------------------------------------*/
1484         /* We determine the size of the parameter code and stack    */
1485         /* requirements by checking the types and sizes of the      */
1486         /* parameters.                                              */
1487         /*----------------------------------------------------------*/
1488
1489         for (i = 0; i < sig->param_count; ++i) {
1490                 MonoType *ptype;
1491
1492                 /*--------------------------------------------------*/
1493                 /* Handle vararg type calls. All args are put on    */
1494                 /* the stack.                                       */
1495                 /*--------------------------------------------------*/
1496                 if ((sig->call_convention == MONO_CALL_VARARG) &&
1497                     (i == sig->sentinelpos)) {
1498                         gr = S390_LAST_ARG_REG + 1;
1499                         add_general (&gr, sz, &cinfo->sigCookie, TRUE);
1500                 }
1501
1502                 if (sig->params [i]->byref) {
1503                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1504                         cinfo->args[nParm].size = sizeof(gpointer);
1505                         nParm++;
1506                         continue;
1507                 }
1508
1509                 ptype = mono_type_get_underlying_type (sig->params [i]);
1510                 ptype = mini_get_basic_type_from_generic (gsctx, ptype);
1511                 simpletype = ptype->type;
1512                 switch (simpletype) {
1513                 case MONO_TYPE_BOOLEAN:
1514                 case MONO_TYPE_I1:
1515                 case MONO_TYPE_U1:
1516                         cinfo->args[nParm].size = sizeof(char);
1517                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1518                         nParm++;
1519                         break;
1520                 case MONO_TYPE_I2:
1521                 case MONO_TYPE_U2:
1522                 case MONO_TYPE_CHAR:
1523                         cinfo->args[nParm].size = sizeof(short);
1524                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1525                         nParm++;
1526                         break;
1527                 case MONO_TYPE_I4:
1528                 case MONO_TYPE_U4:
1529                         cinfo->args[nParm].size = sizeof(int);
1530                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1531                         nParm++;
1532                         break;
1533                 case MONO_TYPE_I:
1534                 case MONO_TYPE_U:
1535                 case MONO_TYPE_PTR:
1536                 case MONO_TYPE_FNPTR:
1537                 case MONO_TYPE_CLASS:
1538                 case MONO_TYPE_OBJECT:
1539                 case MONO_TYPE_STRING:
1540                 case MONO_TYPE_SZARRAY:
1541                 case MONO_TYPE_ARRAY:
1542                         cinfo->args[nParm].size = sizeof(gpointer);
1543                         add_general (&gr, sz, cinfo->args+nParm, TRUE);
1544                         nParm++;
1545                         break;
1546                 case MONO_TYPE_I8:
1547                 case MONO_TYPE_U8:
1548                         cinfo->args[nParm].size = sizeof(long long);
1549                         add_general (&gr, sz, cinfo->args+nParm, FALSE);
1550                         nParm++;
1551                         break;
1552                 case MONO_TYPE_R4:
1553                         cinfo->args[nParm].size = sizeof(float);
1554                         add_float (&fr, sz, cinfo->args+nParm);
1555                         nParm++;
1556                         break;
1557                 case MONO_TYPE_R8:
1558                         cinfo->args[nParm].size = sizeof(double);
1559                         add_float (&fr, sz, cinfo->args+nParm);
1560                         nParm++;
1561                         break;
1562                 case MONO_TYPE_GENERICINST:
1563                         if (!mono_type_generic_inst_is_valuetype (sig->params [i])) {
1564                                 cinfo->args[nParm].size = sizeof(gpointer);
1565                                 add_general (&gr, sz, cinfo->args+nParm, TRUE);
1566                                 nParm++;
1567                                 break;
1568                         }
1569                         /* Fall through */
1570                 case MONO_TYPE_VALUETYPE: {
1571                         MonoMarshalType *info;
1572                         MonoClass *klass = mono_class_from_mono_type (sig->params [i]);
1573                         if (sig->pinvoke)
1574                                 size = mono_class_native_size (klass, &align);
1575                         else
1576                                 size = mono_class_value_size (klass, &align);
1577
1578                         info = mono_marshal_load_type_info (klass);
1579
1580                         if ((info->native_size == sizeof(float)) &&
1581                             (info->num_fields  == 1) &&
1582                             (info->fields[0].field->type->type == MONO_TYPE_R4)) {
1583                                 cinfo->args[nParm].size = sizeof(float);
1584                                 add_float(&fr, sz, cinfo->args+nParm);
1585                                 nParm ++;
1586                                 break;
1587                         }
1588
1589                         if ((info->native_size == sizeof(double)) &&
1590                             (info->num_fields  == 1) &&
1591                             (info->fields[0].field->type->type == MONO_TYPE_R8)) {
1592                                 cinfo->args[nParm].size = sizeof(double);
1593                                 add_float(&fr, sz, cinfo->args+nParm);
1594                                 nParm ++;
1595                                 break;
1596                         }
1597
1598                         cinfo->args[nParm].vtsize  = 0;
1599                         cinfo->args[nParm].size    = 0;
1600
1601                         switch (size) {
1602                                 /*----------------------------------*/
1603                                 /* On S/390, structures of size 1,  */
1604                                 /* 2, 4, and 8 bytes are passed in  */
1605                                 /* (a) register(s).                 */
1606                                 /*----------------------------------*/
1607                                 case 0:
1608                                 case 1:
1609                                 case 2:
1610                                 case 4:
1611                                         add_general(&gr, sz, cinfo->args+nParm, TRUE);
1612                                         cinfo->args[nParm].size    = size;
1613                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1614                                         nParm++;
1615                                         sz->local_size            += sizeof(long);
1616                                         break;
1617                                 case 8:
1618                                         add_general(&gr, sz, cinfo->args+nParm, FALSE);
1619                                         cinfo->args[nParm].size    = sizeof(long long);
1620                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1621                                         nParm++;
1622                                         sz->local_size            += sizeof(long long);
1623                                         break;
1624                                 default:
1625                                         add_stackParm(&gr, sz, cinfo->args+nParm, size);
1626                                         nParm++;
1627                         }
1628                 }
1629                         break;
1630                 case MONO_TYPE_TYPEDBYREF: {
1631                         int size = sizeof (MonoTypedRef);
1632
1633                         cinfo->args[nParm].vtsize  = 0;
1634                         cinfo->args[nParm].size    = 0;
1635
1636                         switch (size) {
1637                                 /*----------------------------------*/
1638                                 /* On S/390, structures of size 1,  */
1639                                 /* 2, 4, and 8 bytes are passed in  */
1640                                 /* (a) register(s).                 */
1641                                 /*----------------------------------*/
1642                                 case 0:
1643                                 case 1:
1644                                 case 2:
1645                                 case 4:
1646                                         add_general(&gr, sz, cinfo->args+nParm, TRUE);
1647                                         cinfo->args[nParm].size    = size;
1648                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1649                                         nParm++;
1650                                         sz->local_size            += sizeof(long);
1651                                         break;
1652                                 case 8:
1653                                         add_general(&gr, sz, cinfo->args+nParm, FALSE);
1654                                         cinfo->args[nParm].size    = sizeof(long long);
1655                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1656                                         nParm++;
1657                                         sz->local_size            += sizeof(long long);
1658                                         break;
1659                                 default:
1660                                         add_stackParm(&gr, sz, cinfo->args+nParm, size);
1661                                         nParm++;
1662                         }
1663                 }
1664                         break;
1665                 default:
1666                         g_error ("Can't trampoline 0x%x", sig->params [i]->type);
1667                 }
1668         }
1669
1670         /*----------------------------------------------------------*/
1671         /* If we are passing a structure back then if it won't be   */
1672         /* in a register(s) then we make room at the end of the     */
1673         /* parameters that may have been placed on the stack        */
1674         /*----------------------------------------------------------*/
1675         if (cinfo->struct_ret) {
1676                 cinfo->ret.offset = sz->stack_size;
1677                 switch (cinfo->ret.size) {
1678                 case 0:
1679                 case 1:
1680                 case 2:
1681                 case 4:
1682                 case 8:
1683                         break;
1684                 default:
1685                         sz->stack_size   += S390_ALIGN(cinfo->ret.size, align);
1686                 }
1687         }
1688
1689         /*----------------------------------------------------------*/
1690         /* Handle the case where there are no implicit arguments    */
1691         /*----------------------------------------------------------*/
1692         if ((sig->call_convention == MONO_CALL_VARARG) &&
1693             (sig->param_count == sig->sentinelpos)) {
1694                 gr = S390_LAST_ARG_REG + 1;
1695                 add_general (&gr, sz, &cinfo->sigCookie, TRUE);
1696         }
1697
1698         cinfo->lastgr   = gr;
1699         sz->stack_size  = sz->stack_size + sz->local_size + sz->parm_size +
1700                           sz->offset;
1701         sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1702
1703         return (cinfo);
1704 }
1705
1706 /*========================= End of Function ========================*/
1707
1708 /*------------------------------------------------------------------*/
1709 /*                                                                  */
1710 /* Name         - mono_arch_allocate_vars                           */
1711 /*                                                                  */
1712 /* Function     - Set var information according to the calling      */
1713 /*                convention for S/390. The local var stuff should  */
1714 /*                most likely be split in another method.           */
1715 /*                                                                  */
1716 /* Parameter    - @m - Compile unit.                                */
1717 /*                                                                  */
1718 /*------------------------------------------------------------------*/
1719
1720 void
1721 mono_arch_allocate_vars (MonoCompile *cfg)
1722 {
1723         MonoMethodSignature *sig;
1724         MonoMethodHeader *header;
1725         MonoInst *inst;
1726         CallInfo *cinfo;
1727         int iParm, iVar, offset, size, align, curinst;
1728         int frame_reg = STK_BASE;
1729         int sArg, eArg;
1730
1731         header  = mono_method_get_header (cfg->method);
1732
1733         cfg->flags |= MONO_CFG_HAS_SPILLUP;
1734
1735         sig     = mono_method_signature (cfg->method);
1736
1737         cinfo   = get_call_info (cfg, cfg->mempool, sig, sig->pinvoke);
1738
1739         /*---------------------------------------------------------*/
1740         /* We use the frame register also for any method that has  */
1741         /* filter clauses. This way, when the handlers are called, */
1742         /* the code will reference local variables using the frame */
1743         /* reg instead of the stack pointer: if we had to restore  */
1744         /* the stack pointer, we'd corrupt the method frames that  */
1745         /* are already on the stack (since filters get called      */
1746         /* before stack unwinding happens) when the filter code    */
1747         /* would call any method.                                  */
1748         /*---------------------------------------------------------*/
1749         if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
1750                 frame_reg = s390_r11;
1751
1752         cfg->frame_reg = frame_reg;
1753
1754         cfg->arch.bkchain_reg = -1;
1755
1756         if (frame_reg != STK_BASE)
1757                 cfg->used_int_regs |= 1 << frame_reg;
1758
1759         sig     = mono_method_signature (cfg->method);
1760
1761         cinfo   = get_call_info (cfg, cfg->mempool, sig, sig->pinvoke);
1762
1763         if (!cinfo->struct_ret) {
1764                 switch (mono_type_get_underlying_type (sig->ret)->type) {
1765                 case MONO_TYPE_VOID:
1766                         break;
1767                 default:
1768                         cfg->ret->opcode = OP_REGVAR;
1769                         cfg->ret->dreg   = s390_r2;
1770                         break;
1771                 }
1772         }
1773
1774         /*--------------------------------------------------------------*/
1775         /* local vars are at a positive offset from the stack pointer   */
1776         /* also note that if the function uses alloca, we use s390_r11  */
1777         /* to point at the local variables.                             */
1778         /* add parameter area size for called functions                 */
1779         /*--------------------------------------------------------------*/
1780         offset          = (cfg->param_area + S390_MINIMAL_STACK_SIZE);
1781         cfg->sig_cookie = 0;
1782
1783         if (cinfo->struct_ret) {
1784                 inst               = cfg->vret_addr;
1785                 offset             = S390_ALIGN(offset, sizeof(gpointer));
1786                 inst->inst_offset  = offset;
1787                 inst->opcode       = OP_REGOFFSET;
1788                 inst->inst_basereg = frame_reg;
1789                 offset            += sizeof(gpointer);
1790                 if (G_UNLIKELY (cfg->verbose_level > 1)) {
1791                         printf ("vret_addr =");
1792                         mono_print_ins (cfg->vret_addr);
1793                 }
1794         }
1795
1796         if (sig->hasthis) {
1797                 inst = cfg->args [0];
1798                 if (inst->opcode != OP_REGVAR) {
1799                         inst->opcode       = OP_REGOFFSET;
1800                         inst->inst_basereg = frame_reg;
1801                         offset             = S390_ALIGN(offset, sizeof(gpointer));
1802                         inst->inst_offset  = offset;
1803                         offset            += sizeof (gpointer);
1804                 }
1805                 curinst = sArg = 1;
1806         } else {
1807                 curinst = sArg = 0;
1808         }
1809
1810         eArg = sig->param_count + sArg;
1811
1812         if (sig->call_convention == MONO_CALL_VARARG)
1813                 cfg->sig_cookie += S390_MINIMAL_STACK_SIZE;
1814
1815         for (iParm = sArg; iParm < eArg; ++iParm) {
1816                 inst = cfg->args [curinst];
1817                 if (inst->opcode != OP_REGVAR) {
1818                         switch (cinfo->args[iParm].regtype) {
1819                             case RegTypeStructByAddr : {
1820                                         MonoInst *indir;
1821
1822                                         size = sizeof (gpointer);
1823
1824                                         if (cinfo->args [iParm].reg == STK_BASE) {
1825                                                 cfg->arch.bkchain_reg = s390_r12;
1826                                                 cfg->used_int_regs |= 1 << cfg->arch.bkchain_reg;
1827
1828                                                 inst->opcode       = OP_REGOFFSET;
1829                                                 inst->inst_basereg = cfg->arch.bkchain_reg;
1830                                                 inst->inst_offset  = cinfo->args [iParm].offset;
1831                                         } else {
1832                                                 inst->opcode = OP_REGOFFSET;
1833                                                 inst->inst_basereg = frame_reg;
1834                                                 inst->inst_offset = S390_ALIGN(offset, sizeof (gpointer));
1835                                         }
1836
1837                                         /* Add a level of indirection */
1838                                         MONO_INST_NEW (cfg, indir, 0);
1839                                         *indir = *inst;
1840                                         inst->opcode = OP_VTARG_ADDR;
1841                                         inst->inst_left = indir;
1842                                 }
1843                                         break;
1844                                 case RegTypeStructByVal :
1845                                         size               = cinfo->args[iParm].size;
1846                                         offset             = S390_ALIGN(offset, size);
1847                                         inst->opcode = OP_REGOFFSET;
1848                                         inst->inst_basereg = frame_reg;
1849                                         inst->inst_offset = S390_ALIGN (offset, size);
1850                                         break;
1851                                 default :
1852                                         if (cinfo->args [iParm].reg == STK_BASE) {
1853                                                 /*
1854                                                  * These arguments are in the previous frame, so we can't
1855                                                  * compute their offset from the current frame pointer right
1856                                                  * now, since cfg->stack_offset is not yet known, so dedicate a
1857                                                  * register holding the previous frame pointer.
1858                                                  */
1859                                                 cfg->arch.bkchain_reg = s390_r12;
1860                                                 cfg->used_int_regs |= 1 << cfg->arch.bkchain_reg;
1861
1862                                                 inst->opcode       = OP_REGOFFSET;
1863                                                 inst->inst_basereg = cfg->arch.bkchain_reg;
1864                                                 size               = (cinfo->args[iParm].size < 4
1865                                                                                   ? 4 - cinfo->args[iParm].size
1866                                                                                   : 0);
1867                                                 inst->inst_offset  = cinfo->args [iParm].offset + size;
1868                                                 size = sizeof (long);
1869                                         } else {
1870                                                 inst->opcode       = OP_REGOFFSET;
1871                                                 inst->inst_basereg = frame_reg;
1872                                                 size               = (cinfo->args[iParm].size < 8
1873                                                                                   ? sizeof(long)
1874                                                                                   : sizeof(long long));
1875                                                 offset             = S390_ALIGN(offset, size);
1876                                                 inst->inst_offset  = offset;
1877                                         }
1878                         }
1879                         if ((sig->call_convention == MONO_CALL_VARARG) &&
1880                             (cinfo->args[iParm].regtype != RegTypeGeneral) &&
1881                             (iParm < sig->sentinelpos))
1882                                 cfg->sig_cookie += size;
1883
1884                         offset += size;
1885                 }
1886                 curinst++;
1887         }
1888
1889         curinst = cfg->locals_start;
1890         for (iVar = curinst; iVar < cfg->num_varinfo; ++iVar) {
1891                 inst = cfg->varinfo [iVar];
1892                 if ((inst->flags & MONO_INST_IS_DEAD) ||
1893                     (inst->opcode == OP_REGVAR))
1894                         continue;
1895
1896                 /*--------------------------------------------------*/
1897                 /* inst->backend.is_pinvoke indicates native sized value types, */
1898                 /* this is used by the pinvoke wrappers when they   */
1899                 /* call functions returning structure               */
1900                 /*--------------------------------------------------*/
1901                 if (inst->backend.is_pinvoke && MONO_TYPE_ISSTRUCT (inst->inst_vtype))
1902                         size = mono_class_native_size (mono_class_from_mono_type(inst->inst_vtype), &align);
1903                 else
1904                         size = mono_type_size (inst->inst_vtype, &align);
1905
1906                 offset             = S390_ALIGN(offset, align);
1907                 inst->inst_offset  = offset;
1908                 inst->opcode       = OP_REGOFFSET;
1909                 inst->inst_basereg = frame_reg;
1910                 offset            += size;
1911                 DEBUG (g_print("allocating local %d to %ld\n", iVar, inst->inst_offset));
1912         }
1913
1914         /*------------------------------------------------------*/
1915         /* Allow space for the trace method stack area if needed*/
1916         /*------------------------------------------------------*/
1917         if (mono_jit_trace_calls != NULL && mono_trace_eval (cfg->method)) {
1918                 offset += S390_TRACE_STACK_SIZE;
1919         }
1920
1921         /*------------------------------------------------------*/
1922         /* Reserve space to save LMF and caller saved registers */
1923         /*------------------------------------------------------*/
1924         if (cfg->method->save_lmf)
1925                 offset += sizeof (MonoLMF);
1926
1927         /*------------------------------------------------------*/
1928         /* align the offset                                     */
1929         /*------------------------------------------------------*/
1930         cfg->stack_offset = S390_ALIGN(offset, S390_STACK_ALIGNMENT);
1931
1932         /* Fix up offsets for arguments whose value is in the parent frame */
1933         for (iParm = sArg; iParm < eArg; ++iParm) {
1934                 inst = cfg->args [iParm];
1935
1936                 if (inst->opcode == OP_S390_STKARG) {
1937                         inst->opcode = OP_REGOFFSET;
1938                         inst->inst_offset += cfg->stack_offset;
1939                 }
1940         }
1941 }
1942
1943 /*========================= End of Function ========================*/
1944
1945 /*------------------------------------------------------------------*/
1946 /*                                                                  */
1947 /* Name         - mono_arch_create_vars                                 */
1948 /*                                                                  */
1949 /*------------------------------------------------------------------*/
1950
1951 void
1952 mono_arch_create_vars (MonoCompile *cfg)
1953 {
1954         MonoMethodSignature *sig;
1955         CallInfo *cinfo;
1956
1957         sig = mono_method_signature (cfg->method);
1958
1959         cinfo = get_call_info (cfg, cfg->mempool, sig, sig->pinvoke);
1960
1961         if (cinfo->struct_ret) {
1962                 cfg->vret_addr = mono_compile_create_var (cfg, &mono_defaults.int_class->byval_arg, OP_ARG);
1963                 if (G_UNLIKELY (cfg->verbose_level > 1)) {
1964                         printf ("vret_addr = ");
1965                         mono_print_ins (cfg->vret_addr);
1966                 }
1967         }
1968 }
1969
1970 /*========================= End of Function ========================*/
1971
1972 static void
1973 add_outarg_reg2 (MonoCompile *cfg, MonoCallInst *call, ArgStorage storage, int reg, MonoInst *tree)
1974 {
1975         MonoInst *ins;
1976
1977         switch (storage) {
1978         case RegTypeGeneral:
1979                 MONO_INST_NEW (cfg, ins, OP_MOVE);
1980                 ins->dreg = mono_alloc_ireg (cfg);
1981                 ins->sreg1 = tree->dreg;
1982                 MONO_ADD_INS (cfg->cbb, ins);
1983                 mono_call_inst_add_outarg_reg (cfg, call, ins->dreg, reg, FALSE);
1984                 break;
1985         case RegTypeFP:
1986                 MONO_INST_NEW (cfg, ins, OP_FMOVE);
1987                 ins->dreg = mono_alloc_freg (cfg);
1988                 ins->sreg1 = tree->dreg;
1989                 MONO_ADD_INS (cfg->cbb, ins);
1990                 mono_call_inst_add_outarg_reg (cfg, call, ins->dreg, reg, TRUE);
1991                 break;
1992         case RegTypeFPR4:
1993                 MONO_INST_NEW (cfg, ins, OP_S390_SETF4RET);
1994                 ins->dreg = mono_alloc_freg (cfg);
1995                 ins->sreg1 = tree->dreg;
1996                 MONO_ADD_INS (cfg->cbb, ins);
1997                 mono_call_inst_add_outarg_reg (cfg, call, ins->dreg, reg, TRUE);
1998                 break;
1999         default:
2000                 g_assert_not_reached ();
2001         }
2002 }
2003
2004 static void
2005 emit_sig_cookie (MonoCompile *cfg, MonoCallInst *call, CallInfo *cinfo)
2006 {
2007         MonoMethodSignature *tmpSig;
2008         MonoInst *sig_arg;
2009
2010         cfg->disable_aot = TRUE;
2011
2012         /*----------------------------------------------------------*/
2013         /* mono_ArgIterator_Setup assumes the signature cookie is   */
2014         /* passed first and all the arguments which were before it  */
2015         /* passed on the stack after the signature. So compensate   */
2016         /* by passing a different signature.                        */
2017         /*----------------------------------------------------------*/
2018         tmpSig = mono_metadata_signature_dup (call->signature);
2019         tmpSig->param_count -= call->signature->sentinelpos;
2020         tmpSig->sentinelpos  = 0;
2021         if (tmpSig->param_count > 0)
2022                 memcpy (tmpSig->params,
2023                         call->signature->params + call->signature->sentinelpos,
2024                         tmpSig->param_count * sizeof(MonoType *));
2025
2026         MONO_INST_NEW (cfg, sig_arg, OP_ICONST);
2027         sig_arg->dreg = mono_alloc_ireg (cfg);
2028         sig_arg->inst_p0 = tmpSig;
2029         MONO_ADD_INS (cfg->cbb, sig_arg);
2030
2031         MONO_EMIT_NEW_STORE_MEMBASE (cfg, OP_STORE_MEMBASE_REG, STK_BASE,
2032                                                                  cinfo->sigCookie.offset, sig_arg->dreg);
2033 }
2034
2035 /*------------------------------------------------------------------*/
2036 /*                                                                  */
2037 /* Name         - mono_arch_emit_call                                   */
2038 /*                                                                  */
2039 /*------------------------------------------------------------------*/
2040
2041 void
2042 mono_arch_emit_call (MonoCompile *cfg, MonoCallInst *call)
2043 {
2044         MonoInst *in;
2045         MonoMethodSignature *sig;
2046         MonoInst *ins;
2047         int i, n, lParamArea;
2048         CallInfo *cinfo;
2049         ArgInfo *ainfo = NULL;
2050         int stackSize;
2051
2052         sig = call->signature;
2053         n = sig->param_count + sig->hasthis;
2054         DEBUG (g_print ("Call requires: %d parameters\n",n));
2055
2056         cinfo = get_call_info (cfg, cfg->mempool, sig, sig->pinvoke);
2057
2058         stackSize         = cinfo->sz.stack_size + cinfo->sz.local_size + cinfo->sz.parm_size + cinfo->sz.offset;
2059         call->stack_usage = MAX(stackSize, call->stack_usage);
2060         lParamArea        = MAX((call->stack_usage-S390_MINIMAL_STACK_SIZE-cinfo->sz.parm_size), 0);
2061         cfg->param_area   = MAX(((signed) cfg->param_area), lParamArea);
2062         cfg->flags       |= MONO_CFG_HAS_CALLS;
2063
2064         if (cinfo->struct_ret) {
2065                 MONO_INST_NEW (cfg, ins, OP_MOVE);
2066                 ins->sreg1 = call->vret_var->dreg;
2067                 ins->dreg = mono_alloc_preg (cfg);
2068                 MONO_ADD_INS (cfg->cbb, ins);
2069                 mono_call_inst_add_outarg_reg (cfg, call, ins->dreg, cinfo->ret.reg, FALSE);
2070         }
2071
2072         for (i = 0; i < n; ++i) {
2073                 ainfo = cinfo->args + i;
2074                 MonoType *t;
2075
2076                 if (i >= sig->hasthis)
2077                         t = sig->params [i - sig->hasthis];
2078                 else
2079                         t = &mono_defaults.int_class->byval_arg;
2080                 t = mono_type_get_underlying_type (t);
2081
2082                 in = call->args [i];
2083
2084                 if ((sig->call_convention == MONO_CALL_VARARG) &&
2085                     (i == sig->sentinelpos)) {
2086                         emit_sig_cookie (cfg, call, cinfo);
2087                 }
2088
2089                 switch (ainfo->regtype) {
2090                 case RegTypeGeneral:
2091                         if (!t->byref && (t->type == MONO_TYPE_I8 || t->type == MONO_TYPE_U8)) {
2092                                 MONO_INST_NEW (cfg, ins, OP_MOVE);
2093                                 ins->dreg = mono_alloc_ireg (cfg);
2094                                 ins->sreg1 = in->dreg + 2;
2095                                 MONO_ADD_INS (cfg->cbb, ins);
2096                                 mono_call_inst_add_outarg_reg (cfg, call, ins->dreg, ainfo->reg, FALSE);
2097                                 MONO_INST_NEW (cfg, ins, OP_MOVE);
2098                                 ins->dreg = mono_alloc_ireg (cfg);
2099                                 ins->sreg1 = in->dreg + 1;
2100                                 MONO_ADD_INS (cfg->cbb, ins);
2101                                 mono_call_inst_add_outarg_reg (cfg, call, ins->dreg, ainfo->reg + 1, FALSE);
2102                         } else {
2103                                 add_outarg_reg2 (cfg, call, ainfo->regtype, ainfo->reg, in);
2104                         }
2105                         break;
2106                 case RegTypeFP:
2107                         if (MONO_TYPE_ISSTRUCT (t)) {
2108                                 /* Valuetype passed in one fp register */
2109                                 ainfo->regtype = RegTypeStructByValInFP;
2110                                 /* Fall through */
2111                         } else {
2112                                 if (ainfo->size == 4)
2113                                         ainfo->regtype = RegTypeFPR4;
2114                                 add_outarg_reg2 (cfg, call, ainfo->regtype, ainfo->reg, in);
2115                                 break;
2116                         }
2117                 case RegTypeStructByVal:
2118                 case RegTypeStructByAddr: {
2119                         guint32 align;
2120                         guint32 size;
2121
2122                         if (sig->params [i - sig->hasthis]->type == MONO_TYPE_TYPEDBYREF) {
2123                                 size = sizeof (MonoTypedRef);
2124                                 align = sizeof (gpointer);
2125                         }
2126                         else
2127                                 if (sig->pinvoke)
2128                                         size = mono_type_native_stack_size (&in->klass->byval_arg, &align);
2129                                 else {
2130                                         /*
2131                                          * Other backends use mono_type_stack_size (), but that
2132                                          * aligns the size to 8, which is larger than the size of
2133                                          * the source, leading to reads of invalid memory if the
2134                                          * source is at the end of address space.
2135                                          */
2136                                         size = mono_class_value_size (in->klass, &align);
2137                                 }
2138
2139                         g_assert (in->klass);
2140
2141                         ainfo->offparm += cinfo->sz.offStruct;
2142
2143                         MONO_INST_NEW (cfg, ins, OP_OUTARG_VT);
2144                         ins->sreg1 = in->dreg;
2145                         ins->klass = in->klass;
2146                         ins->backend.size = ainfo->size;
2147                         ins->inst_p0 = call;
2148                         ins->inst_p1 = mono_mempool_alloc (cfg->mempool, sizeof (ArgInfo));
2149                         memcpy (ins->inst_p1, ainfo, sizeof (ArgInfo));
2150
2151                         MONO_ADD_INS (cfg->cbb, ins);
2152
2153                         if (ainfo->regtype == RegTypeStructByAddr) {
2154                                 /*
2155                                  * We use OP_OUTARG_VT to copy the valuetype to a stack location, then
2156                                  * use the normal OUTARG opcodes to pass the address of the location to
2157                                  * the callee.
2158                                  */
2159                                 int treg = mono_alloc_preg (cfg);
2160                                 MONO_EMIT_NEW_BIALU_IMM (cfg, OP_ADD_IMM, treg,
2161                                                                                  STK_BASE, ainfo->offparm);
2162                                 if (ainfo->reg == STK_BASE) {
2163                                         /* The address is passed on the stack */
2164                                         MONO_INST_NEW (cfg, ins, OP_STORE_MEMBASE_REG);
2165                                         ins->inst_destbasereg = STK_BASE;
2166                                         ins->inst_offset = ainfo->offset;
2167                                         ins->sreg1 = treg;
2168                                         MONO_ADD_INS (cfg->cbb, ins);
2169                                 } else {
2170                                         mono_call_inst_add_outarg_reg (cfg, call, treg, ainfo->reg, FALSE);
2171                                 }
2172                         }
2173                         break;
2174                 }
2175                 case RegTypeBase:
2176                         if (!t->byref && t->type == MONO_TYPE_R4) {
2177                                 MONO_EMIT_NEW_STORE_MEMBASE (cfg, OP_STORER4_MEMBASE_REG,
2178                                                                                          STK_BASE, ainfo->offset,
2179                                                                                          in->dreg);
2180                         } else if (!t->byref && (t->type == MONO_TYPE_R8)) {
2181                                 MONO_EMIT_NEW_STORE_MEMBASE (cfg, OP_STORER8_MEMBASE_REG,
2182                                                                                          STK_BASE, ainfo->offset,
2183                                                                                          in->dreg);
2184                         } else if (!t->byref && (t->type == MONO_TYPE_I8 || t->type == MONO_TYPE_U8)) {
2185                                 MONO_INST_NEW (cfg, ins, OP_STORE_MEMBASE_REG);
2186                                 ins->inst_destbasereg = STK_BASE;
2187                                 ins->inst_offset = ainfo->offset + MINI_LS_WORD_OFFSET;
2188                                 ins->sreg1 = in->dreg + 1;
2189                                 MONO_ADD_INS (cfg->cbb, ins);
2190
2191                                 MONO_INST_NEW (cfg, ins, OP_STORE_MEMBASE_REG);
2192                                 ins->inst_destbasereg = STK_BASE;
2193                                 ins->inst_offset = ainfo->offset + MINI_MS_WORD_OFFSET;
2194                                 ins->sreg1 = in->dreg + 2;
2195                                 MONO_ADD_INS (cfg->cbb, ins);
2196                         } else {
2197                                 MONO_INST_NEW (cfg, ins, OP_STORE_MEMBASE_REG);
2198                                 ins->inst_destbasereg = STK_BASE;
2199                                 ins->inst_offset = ainfo->offset;
2200                                 ins->sreg1 = in->dreg;
2201                                 MONO_ADD_INS (cfg->cbb, ins);
2202                         }
2203                         break;
2204                 default:
2205                         g_assert_not_reached ();
2206                         break;
2207                 }
2208         }
2209
2210         /*
2211          * Handle the case where there are no implicit arguments
2212          */
2213         if ((sig->call_convention == MONO_CALL_VARARG) &&
2214             (i == sig->sentinelpos)) {
2215                 emit_sig_cookie (cfg, call, cinfo);
2216         }
2217 }
2218
2219 /*========================= End of Function ========================*/
2220
2221 /*------------------------------------------------------------------*/
2222 /*                                                                  */
2223 /* Name         - mono_arch_emit_outarg_vt                              */
2224 /*                                                                  */
2225 /*------------------------------------------------------------------*/
2226
2227 void
2228 mono_arch_emit_outarg_vt (MonoCompile *cfg, MonoInst *ins, MonoInst *src)
2229 {
2230         MonoCallInst *call = (MonoCallInst*)ins->inst_p0;
2231         ArgInfo *ainfo = (ArgInfo*)ins->inst_p1;
2232         int size = ins->backend.size;
2233
2234         if (ainfo->regtype == RegTypeStructByVal) {
2235                 /*
2236                                 arg->ins.sreg1  = ainfo->reg;
2237                                 arg->ins.opcode = OP_OUTARG_VT;
2238                                 arg->size       = ainfo->size;
2239                                 arg->offset     = ainfo->offset;
2240                                 arg->offPrm     = ainfo->offparm + cinfo->sz.offStruct;
2241                 */
2242                 if (ainfo->reg != STK_BASE) {
2243                         MONO_OUTPUT_VTR (cfg, size, ainfo->reg, src->dreg, 0);
2244                 } else {
2245                         MONO_OUTPUT_VTS (cfg, size, ainfo->reg, ainfo->offset,
2246                                                           src->dreg, 0);
2247                 }
2248         } else if (ainfo->regtype == RegTypeStructByValInFP) {
2249                 int dreg = mono_alloc_freg (cfg);
2250
2251                 if (ainfo->size == 4) {
2252                         MONO_EMIT_NEW_LOAD_MEMBASE_OP (cfg, OP_LOADR4_MEMBASE, dreg, src->dreg, 0);
2253                         MONO_EMIT_NEW_UNALU (cfg, OP_S390_SETF4RET, dreg, dreg);
2254                 } else {
2255                         g_assert (ainfo->size == 8);
2256
2257                         MONO_EMIT_NEW_LOAD_MEMBASE_OP (cfg, OP_LOADR8_MEMBASE, dreg, src->dreg, 0);
2258                 }
2259
2260                 mono_call_inst_add_outarg_reg (cfg, call, dreg, ainfo->reg, TRUE);
2261         } else {
2262                 MONO_EMIT_NEW_MOVE (cfg, STK_BASE, ainfo->offparm,
2263                                                          src->dreg, 0, size);
2264         }
2265 }
2266
2267 /*------------------------------------------------------------------*/
2268 /*                                                                  */
2269 /* Name         - mono_arch_emit_setret                                 */
2270 /*                                                                  */
2271 /*------------------------------------------------------------------*/
2272
2273 void
2274 mono_arch_emit_setret (MonoCompile *cfg, MonoMethod *method, MonoInst *val)
2275 {
2276         MonoType *ret = mono_type_get_underlying_type (mono_method_signature (method)->ret);
2277
2278         if (!ret->byref) {
2279                 if (ret->type == MONO_TYPE_R4) {
2280                         MONO_EMIT_NEW_UNALU (cfg, OP_S390_SETF4RET, s390_f0, val->dreg);
2281                         return;
2282                 } else if (ret->type == MONO_TYPE_R8) {
2283                         MONO_EMIT_NEW_UNALU (cfg, OP_FMOVE, s390_f0, val->dreg);
2284                         return;
2285                 } else if (ret->type == MONO_TYPE_I8 || ret->type == MONO_TYPE_U8) {
2286                         MONO_EMIT_NEW_UNALU (cfg, OP_MOVE, s390_r3, val->dreg + 1);
2287                         MONO_EMIT_NEW_UNALU (cfg, OP_MOVE, s390_r2, val->dreg + 2);
2288                         return;
2289                 }
2290         }
2291
2292         MONO_EMIT_NEW_UNALU (cfg, OP_MOVE, cfg->ret->dreg, val->dreg);
2293 }
2294
2295 /*========================= End of Function ========================*/
2296
2297 /*------------------------------------------------------------------*/
2298 /*                                                                  */
2299 /* Name         - mono_arch_instrument_mem_needs                    */
2300 /*                                                                  */
2301 /* Function     - Allow tracing to work with this interface (with   */
2302 /*                an optional argument).                            */
2303 /*                                                                  */
2304 /*------------------------------------------------------------------*/
2305
2306 void
2307 mono_arch_instrument_mem_needs (MonoMethod *method, int *stack, int *code)
2308 {
2309         /* no stack room needed now (may be needed for FASTCALL-trace support) */
2310         *stack = 0;
2311         /* split prolog-epilog requirements? */
2312         *code = 50; /* max bytes needed: check this number */
2313 }
2314
2315 /*========================= End of Function ========================*/
2316
2317 /*------------------------------------------------------------------*/
2318 /*                                                                  */
2319 /* Name         - mono_arch_instrument_prolog                       */
2320 /*                                                                  */
2321 /* Function     - Create an "instrumented" prolog.                  */
2322 /*                                                                  */
2323 /*------------------------------------------------------------------*/
2324
2325 void*
2326 mono_arch_instrument_prolog (MonoCompile *cfg, void *func, void *p,
2327                              gboolean enable_arguments)
2328 {
2329         guchar  *code = p;
2330         int     parmOffset,
2331                 fpOffset,
2332                 baseReg;
2333
2334         parmOffset = cfg->stack_usage - S390_TRACE_STACK_SIZE;
2335         if (cfg->method->save_lmf)
2336                 parmOffset -= sizeof(MonoLMF);
2337         fpOffset   = parmOffset + (5*sizeof(gint32));
2338         if (fpOffset > 4096) {
2339                 s390_lr (code, s390_r12, STK_BASE);
2340                 baseReg = s390_r12;
2341                 while (fpOffset > 4096) {
2342                         s390_ahi (code, baseReg, 4096);
2343                         fpOffset   -= 4096;
2344                         parmOffset -= 4096;
2345                 }
2346         } else {
2347                 baseReg = STK_BASE;
2348         }
2349
2350         s390_stm  (code, s390_r2, s390_r6, baseReg, parmOffset);
2351         s390_std  (code, s390_f0, 0, baseReg, fpOffset);
2352         s390_std  (code, s390_f1, 0, baseReg, fpOffset+sizeof(gdouble));
2353         s390_std  (code, s390_f2, 0, baseReg, fpOffset+2*sizeof(gdouble));
2354         s390_basr (code, s390_r13, 0);
2355         s390_j    (code, 6);
2356         s390_word (code, cfg->method);
2357         s390_word (code, func);
2358         s390_l    (code, s390_r2, 0, s390_r13, 4);
2359         s390_la   (code, s390_r3, 0, baseReg, parmOffset);
2360         s390_lr   (code, s390_r4, STK_BASE);
2361         s390_ahi  (code, s390_r4, cfg->stack_usage);
2362         s390_l    (code, s390_r1, 0, s390_r13, 8);
2363         s390_basr (code, s390_r14, s390_r1);
2364         s390_ld   (code, s390_f2, 0, baseReg, fpOffset+2*sizeof(gdouble));
2365         s390_ld   (code, s390_f1, 0, baseReg, fpOffset+sizeof(gdouble));
2366         s390_ld   (code, s390_f0, 0, baseReg, fpOffset);
2367         s390_lm   (code, s390_r2, s390_r6, baseReg, parmOffset);
2368
2369         return code;
2370 }
2371
2372 /*========================= End of Function ========================*/
2373
2374 /*------------------------------------------------------------------*/
2375 /*                                                                  */
2376 /* Name         - mono_arch_instrument_epilog                       */
2377 /*                                                                  */
2378 /* Function     - Create an epilog that will handle the returned    */
2379 /*                values used in instrumentation.                   */
2380 /*                                                                  */
2381 /*------------------------------------------------------------------*/
2382
2383 void*
2384 mono_arch_instrument_epilog_full (MonoCompile *cfg, void *func, void *p, gboolean enable_arguments, gboolean preserve_argument_registers)
2385 {
2386         guchar     *code = p;
2387         int        save_mode = SAVE_NONE,
2388                    saveOffset;
2389         MonoMethod *method = cfg->method;
2390         int        rtype = mono_type_get_underlying_type (mono_method_signature (method)->ret)->type;
2391
2392         saveOffset = cfg->stack_usage - S390_TRACE_STACK_SIZE;
2393         if (method->save_lmf)
2394                 saveOffset -= sizeof(MonoLMF);
2395
2396 handle_enum:
2397         switch (rtype) {
2398         case MONO_TYPE_VOID:
2399                 /* special case string .ctor icall */
2400                 if (strcmp (".ctor", method->name) && method->klass == mono_defaults.string_class)
2401                         save_mode = SAVE_ONE;
2402                 else
2403                         save_mode = SAVE_NONE;
2404                 break;
2405         case MONO_TYPE_I8:
2406         case MONO_TYPE_U8:
2407                 save_mode = SAVE_TWO;
2408                 break;
2409         case MONO_TYPE_R4:
2410                 save_mode = SAVE_R4;
2411                 break;
2412         case MONO_TYPE_R8:
2413                 save_mode = SAVE_R8;
2414                 break;
2415         case MONO_TYPE_VALUETYPE:
2416                 if (mono_method_signature (method)->ret->data.klass->enumtype) {
2417                         rtype = mono_class_enum_basetype (mono_method_signature (method)->ret->data.klass)->type;
2418                         goto handle_enum;
2419                 }
2420                 save_mode = SAVE_STRUCT;
2421                 break;
2422         default:
2423                 save_mode = SAVE_ONE;
2424                 break;
2425         }
2426
2427         switch (save_mode) {
2428         case SAVE_TWO:
2429                 s390_stm (code, s390_r2, s390_r3, cfg->frame_reg, saveOffset);
2430                 if (enable_arguments) {
2431                         s390_lr (code, s390_r4, s390_r3);
2432                         s390_lr (code, s390_r3, s390_r2);
2433                 }
2434                 break;
2435         case SAVE_ONE:
2436                 s390_st (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2437                 if (enable_arguments) {
2438                         s390_lr (code, s390_r3, s390_r2);
2439                 }
2440                 break;
2441         case SAVE_R4:
2442                 s390_std (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2443                 if (enable_arguments) {
2444                         s390_ldebr (code, s390_f0, s390_f0);
2445                 }
2446                 break;
2447         case SAVE_R8:
2448                 s390_std (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2449                 break;
2450         case SAVE_STRUCT:
2451                 s390_st (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2452                 if (enable_arguments) {
2453                         s390_l (code, s390_r3, 0, cfg->frame_reg,
2454                                 S390_MINIMAL_STACK_SIZE+cfg->param_area);
2455                 }
2456                 break;
2457         case SAVE_NONE:
2458         default:
2459                 break;
2460         }
2461
2462         s390_basr (code, s390_r13, 0);
2463         s390_j    (code, 6);
2464         s390_word (code, cfg->method);
2465         s390_word (code, func);
2466         s390_l    (code, s390_r2, 0, s390_r13, 4);
2467         s390_l    (code, s390_r1, 0, s390_r13, 8);
2468         s390_basr (code, s390_r14, s390_r1);
2469
2470         switch (save_mode) {
2471         case SAVE_TWO:
2472                 s390_lm  (code, s390_r2, s390_r3, cfg->frame_reg, saveOffset);
2473                 break;
2474         case SAVE_ONE:
2475                 s390_l   (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2476                 break;
2477         case SAVE_R4:
2478         case SAVE_R8:
2479                 s390_ld  (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2480                 break;
2481         case SAVE_STRUCT:
2482                 s390_l   (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2483                 break;
2484         case SAVE_NONE:
2485         default:
2486                 break;
2487         }
2488
2489         return code;
2490 }
2491
2492 /*========================= End of Function ========================*/
2493
2494 void
2495 mono_arch_peephole_pass_1 (MonoCompile *cfg, MonoBasicBlock *bb)
2496 {
2497 }
2498
2499 /*------------------------------------------------------------------*/
2500 /*                                                                  */
2501 /* Name         - mono_arch_peephole_pass                                     */
2502 /*                                                                  */
2503 /* Function     - Form a peephole pass at the code looking for      */
2504 /*                simple optimizations.                             */
2505 /*                                                                  */
2506 /*------------------------------------------------------------------*/
2507
2508 void
2509 mono_arch_peephole_pass_2 (MonoCompile *cfg, MonoBasicBlock *bb)
2510 {
2511         MonoInst *ins, *n;
2512
2513         MONO_BB_FOR_EACH_INS_SAFE (bb, n, ins) {
2514                 mono_peephole_ins (bb, ins);
2515         }
2516 }
2517
2518 /*========================= End of Function ========================*/
2519
2520 void
2521 mono_arch_lowering_pass (MonoCompile *cfg, MonoBasicBlock *bb)
2522 {
2523         MonoInst *ins, *next;
2524
2525         MONO_BB_FOR_EACH_INS_SAFE (bb, next, ins) {
2526                 switch (ins->opcode) {
2527                 case OP_DIV_IMM:
2528                 case OP_REM_IMM:
2529                 case OP_IDIV_IMM:
2530                 case OP_IREM_IMM:
2531                 case OP_IDIV_UN_IMM:
2532                 case OP_IREM_UN_IMM:
2533                 case OP_LOCALLOC_IMM:
2534                         mono_decompose_op_imm (cfg, bb, ins);
2535                         break;
2536                 default:
2537                         break;
2538                 }
2539         }
2540
2541         bb->max_vreg = cfg->next_vreg;
2542 }
2543
2544 /*========================= End of Function ========================*/
2545
2546 /*------------------------------------------------------------------*/
2547 /*                                                                  */
2548 /* Name         - emit_float_to_int                                 */
2549 /*                                                                  */
2550 /* Function     - Create instructions which will convert a floating */
2551 /*                point value to integer.                           */
2552 /*                                                                  */
2553 /*------------------------------------------------------------------*/
2554
2555 static guchar*
2556 emit_float_to_int (MonoCompile *cfg, guchar *code, int dreg, int sreg, int size, gboolean is_signed)
2557 {
2558         /* sreg is a float, dreg is an integer reg. */
2559         if (is_signed) {
2560                 s390_cfdbr (code, dreg, 5, sreg);
2561                 switch (size) {
2562                         case 1:
2563                                 s390_lhi  (code, s390_r0, 0);
2564                                 s390_lhi  (code, s390_r13, 0xff);
2565                                 s390_ltr  (code, dreg, dreg);
2566                                 s390_jnl  (code, 4);
2567                                 s390_lhi  (code, s390_r0, 0x80);
2568                                 s390_nr   (code, dreg, s390_r13);
2569                                 s390_or   (code, dreg, s390_r0);
2570                                 break;
2571                 }
2572         } else {
2573                 short *o[1];
2574                 s390_basr   (code, s390_r13, 0);
2575                 s390_j      (code, 10);
2576                 s390_llong  (code, 0x41e0000000000000LL);
2577                 s390_llong  (code, 0x41f0000000000000LL);
2578                 s390_ldr    (code, s390_f15, sreg);
2579                 s390_cdb    (code, s390_f15, 0, s390_r13, 4);
2580                 s390_jl     (code, 0); CODEPTR(code, o[0]);
2581                 s390_sdb    (code, s390_f15, 0, s390_r13, 12);
2582                 s390_cfdbr  (code, dreg, 7, s390_f15);
2583                 s390_j      (code, 4);
2584                 PTRSLOT(code, o[0]);
2585                 s390_cfdbr  (code, dreg, 5, sreg);
2586                 switch (size) {
2587                         case 1:
2588                                 s390_lhi  (code, s390_r0, 0xff);
2589                                 s390_nr   (code, dreg, s390_r0);
2590                                 break;
2591                         case 2:
2592                                 s390_lhi  (code, s390_r0, -1);
2593                                 s390_srl  (code, s390_r0, 0, 16);
2594                                 s390_nr   (code, dreg, s390_r0);
2595                                 break;
2596                 }
2597         }
2598         return code;
2599 }
2600
2601 /*========================= End of Function ========================*/
2602
2603 /*------------------------------------------------------------------*/
2604 /*                                                                  */
2605 /* Name         - mono_arch_output_basic_block                      */
2606 /*                                                                  */
2607 /* Function     - Perform the "real" work of emitting instructions  */
2608 /*                that will do the work of in the basic block.      */
2609 /*                                                                  */
2610 /*------------------------------------------------------------------*/
2611
2612 void
2613 mono_arch_output_basic_block (MonoCompile *cfg, MonoBasicBlock *bb)
2614 {
2615         MonoInst *ins;
2616         MonoCallInst *call;
2617         guint offset;
2618         guint8 *code = cfg->native_code + cfg->code_len;
2619         MonoInst *last_ins = NULL;
2620         guint last_offset = 0;
2621         int max_len, cpos, src2;
2622
2623         /* we don't align basic blocks of loops on s390 */
2624
2625         if (cfg->verbose_level > 2)
2626                 g_print ("Basic block %d starting at offset 0x%x\n", bb->block_num, bb->native_offset);
2627
2628         cpos = bb->max_offset;
2629
2630         if (cfg->prof_options & MONO_PROFILE_COVERAGE) {
2631                 //MonoCoverageInfo *cov = mono_get_coverage_info (cfg->method);
2632                 //g_assert (!mono_compile_aot);
2633                 //cpos += 6;
2634                 //if (bb->cil_code)
2635                 //      cov->data [bb->dfn].iloffset = bb->cil_code - cfg->cil_code;
2636                 /* this is not thread save, but good enough */
2637                 /* fixme: howto handle overflows? */
2638                 //x86_inc_mem (code, &cov->data [bb->dfn].count);
2639         }
2640
2641         MONO_BB_FOR_EACH_INS (bb, ins) {
2642                 offset = code - cfg->native_code;
2643
2644                 max_len = ((guint8 *)ins_get_spec (ins->opcode))[MONO_INST_LEN];
2645
2646                 if (offset > (cfg->code_size - max_len - 16)) {
2647                         cfg->code_size *= 2;
2648                         cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
2649                         code = cfg->native_code + offset;
2650                 }
2651
2652                 mono_debug_record_line_number (cfg, ins, offset);
2653
2654                 switch (ins->opcode) {
2655                 case OP_STOREI1_MEMBASE_IMM: {
2656                         s390_lhi (code, s390_r0, ins->inst_imm);
2657                         if (s390_is_uimm12(ins->inst_offset))
2658                                 s390_stc (code, s390_r0, 0, ins->inst_destbasereg, ins->inst_offset);
2659                         else {
2660                                 s390_basr (code, s390_r13, 0);
2661                                 s390_j    (code, 4);
2662                                 s390_word (code, ins->inst_offset);
2663                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2664                                 s390_stc  (code, s390_r0, s390_r13, ins->inst_destbasereg, 0);
2665                         }
2666                 }
2667                         break;
2668                 case OP_STOREI2_MEMBASE_IMM: {
2669                         s390_lhi (code, s390_r0, ins->inst_imm);
2670                         if (s390_is_uimm12(ins->inst_offset)) {
2671                                 s390_sth (code, s390_r0, 0, ins->inst_destbasereg, ins->inst_offset);
2672                         } else {
2673                                 s390_basr (code, s390_r13, 0);
2674                                 s390_j    (code, 4);
2675                                 s390_word (code, ins->inst_offset);
2676                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2677                                 s390_sth  (code, s390_r0, s390_r13, ins->inst_destbasereg, 0);
2678                         }
2679                 }
2680                         break;
2681                 case OP_STORE_MEMBASE_IMM:
2682                 case OP_STOREI4_MEMBASE_IMM: {
2683                         if (s390_is_imm16(ins->inst_imm)) {
2684                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2685                         } else {
2686                                 s390_basr (code, s390_r13, 0);
2687                                 s390_j    (code, 4);
2688                                 s390_word (code, ins->inst_imm);
2689                                 s390_l    (code, s390_r0, 0, s390_r13, 4);
2690                         }
2691                         if (s390_is_uimm12(ins->inst_offset)) {
2692                                 s390_st  (code, s390_r0, 0, ins->inst_destbasereg, ins->inst_offset);
2693                         } else {
2694                                 s390_basr (code, s390_r13, 0);
2695                                 s390_j    (code, 4);
2696                                 s390_word (code, ins->inst_offset);
2697                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2698                                 s390_st   (code, s390_r0, s390_r13, ins->inst_destbasereg, 0);
2699                         }
2700                 }
2701                         break;
2702                 case OP_STOREI1_MEMBASE_REG: {
2703                         if (s390_is_uimm12(ins->inst_offset)) {
2704                                 s390_stc  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
2705                         } else {
2706                                 s390_basr (code, s390_r13, 0);
2707                                 s390_j    (code, 4);
2708                                 s390_word (code, ins->inst_offset);
2709                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2710                                 s390_stc  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
2711                         }
2712                 }
2713                         break;
2714                 case OP_STOREI2_MEMBASE_REG: {
2715                         if (s390_is_uimm12(ins->inst_offset)) {
2716                                 s390_sth  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
2717                         } else {
2718                                 s390_basr (code, s390_r13, 0);
2719                                 s390_j    (code, 4);
2720                                 s390_word (code, ins->inst_offset);
2721                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2722                                 s390_sth  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
2723                         }
2724                 }
2725                         break;
2726                 case OP_STORE_MEMBASE_REG:
2727                 case OP_STOREI4_MEMBASE_REG: {
2728                         if (s390_is_uimm12(ins->inst_offset)) {
2729                                 s390_st   (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
2730                         } else {
2731                                 s390_basr (code, s390_r13, 0);
2732                                 s390_j    (code, 4);
2733                                 s390_word (code, ins->inst_offset);
2734                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2735                                 s390_st   (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
2736                         }
2737                 }
2738                         break;
2739                 case OP_LOADU4_MEM:
2740                         g_assert_not_reached ();
2741                         break;
2742                 case OP_LOAD_MEMBASE:
2743                 case OP_LOADI4_MEMBASE:
2744                 case OP_LOADU4_MEMBASE: {
2745                         if (s390_is_uimm12(ins->inst_offset))
2746                                 s390_l    (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
2747                         else {
2748                                 if (s390_is_imm16(ins->inst_offset)) {
2749                                         s390_lhi (code, s390_r13, ins->inst_offset);
2750                                         s390_l   (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
2751                                 } else {
2752                                         s390_basr (code, s390_r13, 0);
2753                                         s390_j    (code, 4);
2754                                         s390_word (code, ins->inst_offset);
2755                                         s390_l    (code, s390_r13, 0, s390_r13, 4);
2756                                         s390_l    (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
2757                                 }
2758                         }
2759                 }
2760                         break;
2761                 case OP_LOADU1_MEMBASE: {
2762                         s390_lhi (code, s390_r0, 0);
2763                         if (s390_is_uimm12(ins->inst_offset))
2764                                 s390_ic   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
2765                         else {
2766                                 s390_basr (code, s390_r13, 0);
2767                                 s390_j    (code, 4);
2768                                 s390_word (code, ins->inst_offset);
2769                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2770                                 s390_ic   (code, s390_r0, s390_r13, ins->inst_basereg, 0);
2771                         }
2772                         s390_lr   (code, ins->dreg, s390_r0);
2773                 }
2774                         break;
2775                 case OP_LOADI1_MEMBASE: {
2776                         s390_lhi (code, s390_r0, 0);
2777                         if (s390_is_uimm12(ins->inst_offset))
2778                                 s390_ic   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
2779                         else {
2780                                 s390_basr (code, s390_r13, 0);
2781                                 s390_j    (code, 4);
2782                                 s390_word (code, ins->inst_offset);
2783                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2784                                 s390_ic   (code, s390_r0, s390_r13, ins->inst_basereg, 0);
2785                         }
2786                         s390_lhi  (code, s390_r13, 0x80);
2787                         s390_nr   (code, s390_r13, s390_r0);
2788                         s390_jz   (code, 5);
2789                         s390_lhi  (code, s390_r13, 0xff00);
2790                         s390_or   (code, s390_r0, s390_r13);
2791                         s390_lr   (code, ins->dreg, s390_r0);
2792                 }
2793                         break;
2794                 case OP_LOADU2_MEMBASE: {
2795                         s390_lhi (code, s390_r0, 0);
2796                         if (s390_is_uimm12(ins->inst_offset))
2797                                 s390_icm  (code, s390_r0, 3, ins->inst_basereg, ins->inst_offset);
2798                         else {
2799                                 s390_basr (code, s390_r13, 0);
2800                                 s390_j    (code, 4);
2801                                 s390_word (code, ins->inst_offset);
2802                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2803                                 s390_ar   (code, s390_r13, ins->inst_basereg);
2804                                 s390_icm  (code, s390_r0, 3, s390_r13, 0);
2805                         }
2806                         s390_lr  (code, ins->dreg, s390_r0);
2807                 }
2808                         break;
2809                 case OP_LOADI2_MEMBASE: {
2810                         s390_lhi (code, s390_r0, 0);
2811                         if (s390_is_uimm12(ins->inst_offset))
2812                                 s390_lh   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
2813                         else {
2814                                 s390_basr (code, s390_r13, 0);
2815                                 s390_j    (code, 4);
2816                                 s390_word (code, ins->inst_offset);
2817                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
2818                                 s390_lh   (code, s390_r0, s390_r13, ins->inst_basereg, 0);
2819                         }
2820                         s390_lr  (code, ins->dreg, s390_r0);
2821                 }
2822                         break;
2823
2824                 case OP_ICONV_TO_I1: {
2825                         if (ins->dreg != ins->sreg1)
2826                                 s390_lr   (code, ins->dreg, ins->sreg1);
2827                         s390_sll (code, ins->dreg, 0, 24);
2828                         s390_sra (code, ins->dreg, 0, 24);
2829                 }
2830                         break;
2831                 case OP_ICONV_TO_I2: {
2832                         if (ins->dreg != ins->sreg1)
2833                                 s390_lr   (code, ins->dreg, ins->sreg1);
2834                         s390_sll (code, ins->dreg, 0, 16);
2835                         s390_sra (code, ins->dreg, 0, 16);
2836                 }
2837                         break;
2838                 case OP_ICONV_TO_U1: {
2839                         s390_lhi  (code, s390_r0, 0xff);
2840                         if (ins->dreg != ins->sreg1) {
2841                                 s390_lr   (code, ins->dreg, ins->sreg1);
2842                         }
2843                         s390_nr   (code, ins->dreg, s390_r0);
2844                 }
2845                         break;
2846                 case OP_ICONV_TO_U2: {
2847                         s390_lhi  (code, s390_r0, -1);
2848                         s390_sll  (code, s390_r0, 0, 16);
2849                         s390_srl  (code, s390_r0, 0, 16);
2850                         if (ins->dreg != ins->sreg1) {
2851                                 s390_lr   (code, ins->dreg, ins->sreg1);
2852                         }
2853                         s390_nr   (code, ins->dreg, s390_r0);
2854                 }
2855                         break;
2856                 case OP_COMPARE:
2857                 case OP_ICOMPARE: {
2858                         gboolean un = FALSE;
2859                         MonoInst *next = ins->next;
2860
2861                         if ((next) &&
2862                             (((next->opcode >= OP_IBNE_UN) &&
2863                               (next->opcode <= OP_IBLT_UN)) ||
2864                              ((next->opcode >= OP_COND_EXC_NE_UN) &&
2865                               (next->opcode <= OP_COND_EXC_LT_UN)) ||
2866                              ((next->opcode >= OP_COND_EXC_INE_UN) &&
2867                               (next->opcode <= OP_COND_EXC_ILT_UN)) ||
2868                              ((next->opcode == OP_CLT_UN) ||
2869                               (next->opcode == OP_CGT_UN)) ||
2870                              ((next->opcode == OP_ICLT_UN) ||
2871                               (next->opcode == OP_ICGT_UN))))
2872                                 un = TRUE;
2873
2874                         if (un)
2875                                 s390_clr  (code, ins->sreg1, ins->sreg2);
2876                         else
2877                                 s390_cr   (code, ins->sreg1, ins->sreg2);
2878                 }
2879                         break;
2880                 case OP_COMPARE_IMM:
2881                 case OP_ICOMPARE_IMM: {
2882                         gboolean un = FALSE;
2883                         MonoInst *next = ins->next;
2884
2885                         if ((next) &&
2886                             (((next->opcode >= OP_IBNE_UN) &&
2887                               (next->opcode <= OP_IBLT_UN)) ||
2888                              ((next->opcode >= OP_COND_EXC_NE_UN) &&
2889                               (next->opcode <= OP_COND_EXC_LT_UN)) ||
2890                              ((next->opcode >= OP_COND_EXC_INE_UN) &&
2891                               (next->opcode <= OP_COND_EXC_ILT_UN)) ||
2892                              ((next->opcode == OP_CLT_UN) ||
2893                               (next->opcode == OP_CGT_UN)) ||
2894                              ((next->opcode == OP_ICLT_UN) ||
2895                               (next->opcode == OP_ICGT_UN))))
2896                                 un = TRUE;
2897
2898                         if (s390_is_imm16 (ins->inst_imm)) {
2899                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2900                                 if (un)
2901                                         s390_clr  (code, ins->sreg1, s390_r0);
2902                                 else
2903                                         s390_cr   (code, ins->sreg1, s390_r0);
2904                         }
2905                         else {
2906                                 s390_basr (code, s390_r13, 0);
2907                                 s390_j    (code, 4);
2908                                 s390_word (code, ins->inst_imm);
2909                                 if (un)
2910                                         s390_cl   (code, ins->sreg1, 0, s390_r13, 4);
2911                                 else
2912                                         s390_c    (code, ins->sreg1, 0, s390_r13, 4);
2913                         }
2914                 }
2915                         break;
2916                 case OP_BREAK: {
2917                         mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS, mono_break);
2918                         s390_brasl (code, s390_r14, 0);
2919                 }
2920                         break;
2921                 case OP_ADDCC:
2922                 case OP_IADDCC: {
2923                         CHECK_SRCDST_COM;
2924                         s390_alr  (code, ins->dreg, src2);
2925                 }
2926                         break;
2927                 case OP_IADD: {
2928                         CHECK_SRCDST_COM;
2929                         s390_ar   (code, ins->dreg, src2);
2930                 }
2931                         break;
2932                 case OP_ADC:
2933                 case OP_IADC: {
2934                         CHECK_SRCDST_COM;
2935                         s390_alcr (code, ins->dreg, src2);
2936                 }
2937                         break;
2938                 case OP_ADD_IMM:
2939                 case OP_IADD_IMM: {
2940                         if (ins->dreg != ins->sreg1) {
2941                                 s390_lr   (code, ins->dreg, ins->sreg1);
2942                         }
2943                         if ((ins->next) &&
2944                             (ins->next->opcode == OP_ADC_IMM)) {
2945                                 s390_basr (code, s390_r13, 0);
2946                                 s390_j    (code, 4);
2947                                 s390_word (code, ins->inst_imm);
2948                                 s390_a (code, ins->dreg, 0, s390_r13, 4);
2949                         } else {
2950                                 if (s390_is_imm16 (ins->inst_imm)) {
2951                                         s390_ahi  (code, ins->dreg, ins->inst_imm);
2952                                 } else {
2953                                         s390_basr (code, s390_r13, 0);
2954                                         s390_j    (code, 4);
2955                                         s390_word (code, ins->inst_imm);
2956                                         s390_a (code, ins->dreg, 0, s390_r13, 4);
2957                                 }
2958                         }
2959                 }
2960                         break;
2961                 case OP_ADDCC_IMM: {
2962                         if ((ins->next) &&
2963                             (ins->next->opcode == OP_ADC_IMM)) {
2964                                 s390_basr (code, s390_r13, 0);
2965                                 s390_j    (code, 4);
2966                                 s390_word (code, ins->inst_imm);
2967                                 if (ins->dreg != ins->sreg1) {
2968                                         s390_lr   (code, ins->dreg, ins->sreg1);
2969                                 }
2970                                 s390_al   (code, ins->dreg, 0, s390_r13, 4);
2971                         } else {
2972                                 if (s390_is_imm16 (ins->inst_imm)) {
2973                                         if (ins->dreg != ins->sreg1) {
2974                                                 s390_lr   (code, ins->dreg, ins->sreg1);
2975                                         }
2976                                         s390_lhi  (code, s390_r0, ins->inst_imm);
2977                                         s390_alcr (code, ins->dreg, s390_r0);
2978                                 } else {
2979                                         s390_basr (code, s390_r13, 0);
2980                                         s390_j    (code, 4);
2981                                         s390_word (code, ins->inst_imm);
2982                                         if (ins->dreg != ins->sreg1) {
2983                                                 s390_lr   (code, ins->dreg, ins->sreg1);
2984                                         }
2985                                         s390_al   (code, ins->dreg, 0, s390_r13, 4);
2986                                 }
2987                         }
2988                 }
2989                         break;
2990                 case OP_ADC_IMM: {
2991                         if (s390_is_imm16 (ins->inst_imm)) {
2992                                 if (ins->dreg != ins->sreg1) {
2993                                         s390_lr   (code, ins->dreg, ins->sreg1);
2994                                 }
2995                                 s390_lhi  (code, s390_r0, ins->inst_imm);
2996                                 s390_alcr (code, ins->dreg, s390_r0);
2997                         } else {
2998                                 s390_basr (code, s390_r13, 0);
2999                                 s390_j    (code, 4);
3000                                 s390_word (code, ins->inst_imm);
3001                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3002                                 s390_alcr (code, ins->dreg, s390_r13);
3003                         }
3004                 }
3005                         break;
3006                 case OP_IADD_OVF:
3007                 case OP_S390_IADD_OVF: {
3008                         CHECK_SRCDST_COM;
3009                         s390_ar   (code, ins->dreg, src2);
3010                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3011                 }
3012                         break;
3013                 case OP_IADD_OVF_UN:
3014                 case OP_S390_IADD_OVF_UN: {
3015                         CHECK_SRCDST_COM;
3016                         s390_alr  (code, ins->dreg, src2);
3017                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
3018                 }
3019                         break;
3020                 case OP_LADD:
3021                 case OP_S390_LADD: {
3022                         s390_alr  (code, s390_r0, ins->sreg1);
3023                         s390_jnc  (code, 4);
3024                         s390_ahi  (code, s390_r1, 1);
3025                         s390_ar   (code, s390_r1, ins->sreg2);
3026                         s390_lr   (code, ins->dreg, s390_r0);
3027                         s390_lr   (code, ins->dreg+1, s390_r1);
3028                 }
3029                         break;
3030                 case OP_LADD_OVF:
3031                 case OP_S390_LADD_OVF: {
3032                         short int *o[1];
3033                         s390_alr  (code, s390_r0, ins->sreg1);
3034                         s390_jnc  (code, 0); CODEPTR(code, o[0]);
3035                         s390_ahi  (code, s390_r1, 1);
3036                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3037                         PTRSLOT   (code, o[0]);
3038                         s390_ar   (code, s390_r1, ins->sreg2);
3039                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3040                         s390_lr   (code, ins->dreg, s390_r0);
3041                         s390_lr   (code, ins->dreg+1, s390_r1);
3042                 }
3043                         break;
3044                 case OP_LADD_OVF_UN:
3045                 case OP_S390_LADD_OVF_UN: {
3046                         s390_alr  (code, s390_r0, ins->sreg1);
3047                         s390_alcr (code, s390_r1, ins->sreg2);
3048                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
3049                         s390_lr   (code, ins->dreg, s390_r0);
3050                         s390_lr   (code, ins->dreg+1, s390_r1);
3051                 }
3052                         break;
3053                 case OP_ADD_OVF_CARRY: {
3054                         CHECK_SRCDST_COM;
3055                         s390_lhi  (code, s390_r0, 0);
3056                         s390_lr   (code, s390_r1, s390_r0);
3057                         s390_alcr (code, s390_r0, s390_r1);
3058                         s390_ar   (code, ins->dreg, src2);
3059                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3060                         s390_ar   (code, ins->dreg, s390_r0);
3061                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3062                 }
3063                         break;
3064                 case OP_ADD_OVF_UN_CARRY: {
3065                         CHECK_SRCDST_COM;
3066                         s390_alcr (code, ins->dreg, src2);
3067                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
3068                 }
3069                         break;
3070                 case OP_SUBCC:
3071                 case OP_ISUBCC: {
3072                         CHECK_SRCDST_NCOM;
3073                         s390_slr (code, ins->dreg, src2);
3074                 }
3075                         break;
3076                 case OP_ISUB: {
3077                         CHECK_SRCDST_NCOM;
3078                         s390_sr   (code, ins->dreg, src2);
3079                 }
3080                         break;
3081                 case OP_SBB:
3082                 case OP_ISBB: {
3083                         CHECK_SRCDST_NCOM;
3084                         s390_slbr (code, ins->dreg, src2);
3085                 }
3086                         break;
3087                 case OP_SUBCC_IMM: {
3088                         if (s390_is_imm16 (-ins->inst_imm)) {
3089                                 if (ins->dreg != ins->sreg1) {
3090                                         s390_lr   (code, ins->dreg, ins->sreg1);
3091                                 }
3092                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3093                                 s390_slr  (code, ins->dreg, s390_r0);
3094                         } else {
3095                                 s390_basr (code, s390_r13, 0);
3096                                 s390_j    (code, 4);
3097                                 s390_word (code, ins->inst_imm);
3098                                 if (ins->dreg != ins->sreg1) {
3099                                         s390_lr   (code, ins->dreg, ins->sreg1);
3100                                 }
3101                                 s390_sl   (code, ins->dreg, 0, s390_r13, 4);
3102                         }
3103                 }
3104                         break;
3105                 case OP_SUB_IMM:
3106                 case OP_ISUB_IMM: {
3107                         if (s390_is_imm16 (-ins->inst_imm)) {
3108                                 if (ins->dreg != ins->sreg1) {
3109                                         s390_lr   (code, ins->dreg, ins->sreg1);
3110                                 }
3111                                 s390_ahi  (code, ins->dreg, -ins->inst_imm);
3112                         } else {
3113                                 s390_basr (code, s390_r13, 0);
3114                                 s390_j    (code, 4);
3115                                 s390_word (code, ins->inst_imm);
3116                                 if (ins->dreg != ins->sreg1) {
3117                                         s390_lr   (code, ins->dreg, ins->sreg1);
3118                                 }
3119                                 s390_s    (code, ins->dreg, 0, s390_r13, 4);
3120                         }
3121                 }
3122                         break;
3123                 case OP_SBB_IMM: {
3124                         if (ins->dreg != ins->sreg1) {
3125                                 s390_lr    (code, ins->dreg, ins->sreg1);
3126                         }
3127                         if (s390_is_imm16 (-ins->inst_imm)) {
3128                                 s390_lhi   (code, s390_r0, ins->inst_imm);
3129                                 s390_slbr  (code, ins->dreg, s390_r0);
3130                         } else {
3131                                 s390_basr (code, s390_r13, 0);
3132                                 s390_j    (code, 4);
3133                                 s390_word (code, ins->inst_imm);
3134                                 s390_slb  (code, ins->dreg, 0, s390_r13, 4);
3135                         }
3136                 }
3137                         break;
3138                 case OP_ISUB_OVF:
3139                 case OP_S390_ISUB_OVF: {
3140                         CHECK_SRCDST_NCOM;
3141                         s390_sr   (code, ins->dreg, src2);
3142                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3143                 }
3144                         break;
3145                 case OP_ISUB_OVF_UN:
3146                 case OP_S390_ISUB_OVF_UN: {
3147                         CHECK_SRCDST_NCOM;
3148                         s390_slr  (code, ins->dreg, src2);
3149                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
3150                 }
3151                         break;
3152                 case OP_LSUB:
3153                 case OP_S390_LSUB: {
3154                         s390_lr   (code, s390_r14, ins->sreg2);
3155                         s390_slr  (code, s390_r0, ins->sreg1);
3156                         s390_jnl  (code, 4);
3157                         s390_ahi  (code, s390_r14, 1);
3158                         s390_sr   (code, s390_r1, s390_r14);
3159                         s390_lr   (code, ins->dreg, s390_r0);
3160                         s390_lr   (code, ins->dreg+1, s390_r1);
3161                 }
3162                         break;
3163                 case OP_LSUB_OVF:
3164                 case OP_S390_LSUB_OVF: {
3165                         short int *o[1];
3166                         s390_lr   (code, s390_r14, ins->sreg2);
3167                         s390_slr  (code, s390_r0, ins->sreg1);
3168                         s390_jnl  (code, 0); CODEPTR(code, o[0]);
3169                         s390_ahi  (code, s390_r14, 1);
3170                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3171                         PTRSLOT   (code, o[0]);
3172                         s390_sr   (code, s390_r1, s390_r14);
3173                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3174                         s390_lr   (code, ins->dreg, s390_r0);
3175                         s390_lr   (code, ins->dreg+1, s390_r1);
3176                 }
3177                         break;
3178                 case OP_LSUB_OVF_UN:
3179                 case OP_S390_LSUB_OVF_UN: {
3180                         s390_slr  (code, s390_r0, ins->sreg1);
3181                         s390_slbr (code, s390_r1, ins->sreg2);
3182                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, "OverflowException");
3183                         s390_lr   (code, ins->dreg, s390_r0);
3184                         s390_lr   (code, ins->dreg+1, s390_r1);
3185                 }
3186                         break;
3187                 case OP_SUB_OVF_CARRY: {
3188                         CHECK_SRCDST_NCOM;
3189                         s390_lhi  (code, s390_r0, 0);
3190                         s390_lr   (code, s390_r1, s390_r0);
3191                         s390_slbr (code, s390_r0, s390_r1);
3192                         s390_sr   (code, ins->dreg, src2);
3193                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3194                         s390_ar   (code, ins->dreg, s390_r0);
3195                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3196                 }
3197                         break;
3198                 case OP_SUB_OVF_UN_CARRY: {
3199                         CHECK_SRCDST_NCOM;
3200                         s390_slbr (code, ins->dreg, src2);
3201                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
3202                 }
3203                         break;
3204                 case OP_IAND: {
3205                         if (ins->sreg1 == ins->dreg) {
3206                                 s390_nr   (code, ins->dreg, ins->sreg2);
3207                         }
3208                         else {
3209                                 if (ins->sreg2 == ins->dreg) {
3210                                         s390_nr  (code, ins->dreg, ins->sreg1);
3211                                 }
3212                                 else {
3213                                         s390_lr  (code, ins->dreg, ins->sreg1);
3214                                         s390_nr  (code, ins->dreg, ins->sreg2);
3215                                 }
3216                         }
3217                 }
3218                         break;
3219                 case OP_AND_IMM:
3220                 case OP_IAND_IMM: {
3221                         if (s390_is_imm16 (ins->inst_imm)) {
3222                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3223                                 if (ins->dreg != ins->sreg1) {
3224                                         s390_lr   (code, ins->dreg, ins->sreg1);
3225                                 }
3226                                 s390_nr   (code, ins->dreg, s390_r0);
3227                         } else {
3228                                 s390_basr (code, s390_r13, 0);
3229                                 s390_j    (code, 4);
3230                                 s390_word (code, ins->inst_imm);
3231                                 if (ins->dreg != ins->sreg1) {
3232                                         s390_lr   (code, ins->dreg, ins->sreg1);
3233                                 }
3234                                 s390_n    (code, ins->dreg, 0, s390_r13, 4);
3235                         }
3236                 }
3237                         break;
3238                 case OP_IDIV: {
3239                         s390_lr   (code, s390_r0, ins->sreg1);
3240                         s390_srda (code, s390_r0, 0, 32);
3241                         s390_dr   (code, s390_r0, ins->sreg2);
3242                         s390_lr   (code, ins->dreg, s390_r1);
3243                 }
3244                         break;
3245                 case OP_IDIV_UN: {
3246                         s390_lr   (code, s390_r0, ins->sreg1);
3247                         s390_srdl (code, s390_r0, 0, 32);
3248                         s390_dlr  (code, s390_r0, ins->sreg2);
3249                         s390_lr   (code, ins->dreg, s390_r1);
3250                 }
3251                         break;
3252                 case OP_IREM: {
3253                         s390_lr   (code, s390_r0, ins->sreg1);
3254                         s390_srda (code, s390_r0, 0, 32);
3255                         s390_dr   (code, s390_r0, ins->sreg2);
3256                         s390_lr   (code, ins->dreg, s390_r0);
3257                         break;
3258                 case OP_IREM_UN:
3259                         s390_lr   (code, s390_r0, ins->sreg1);
3260                         s390_srdl (code, s390_r0, 0, 32);
3261                         s390_dlr  (code, s390_r0, ins->sreg2);
3262                         s390_lr   (code, ins->dreg, s390_r0);
3263                 }
3264                         break;
3265                 case OP_IOR: {
3266                         if (ins->sreg1 == ins->dreg) {
3267                                 s390_or   (code, ins->dreg, ins->sreg2);
3268                         }
3269                         else {
3270                                 if (ins->sreg2 == ins->dreg) {
3271                                         s390_or  (code, ins->dreg, ins->sreg1);
3272                                 }
3273                                 else {
3274                                         s390_lr  (code, ins->dreg, ins->sreg1);
3275                                         s390_or  (code, ins->dreg, ins->sreg2);
3276                                 }
3277                         }
3278                 }
3279                         break;
3280                 case OP_OR_IMM:
3281                 case OP_IOR_IMM: {
3282                         if (s390_is_imm16 (ins->inst_imm)) {
3283                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3284                                 if (ins->dreg != ins->sreg1) {
3285                                         s390_lr   (code, ins->dreg, ins->sreg1);
3286                                 }
3287                                 s390_or   (code, ins->dreg, s390_r0);
3288                         } else {
3289                                 s390_basr (code, s390_r13, 0);
3290                                 s390_j    (code, 4);
3291                                 s390_word (code, ins->inst_imm);
3292                                 if (ins->dreg != ins->sreg1) {
3293                                         s390_lr   (code, ins->dreg, ins->sreg1);
3294                                 }
3295                                 s390_o    (code, ins->dreg, 0, s390_r13, 4);
3296                         }
3297                 }
3298                         break;
3299                 case OP_IXOR: {
3300                         if (ins->sreg1 == ins->dreg) {
3301                                 s390_xr   (code, ins->dreg, ins->sreg2);
3302                         }
3303                         else {
3304                                 if (ins->sreg2 == ins->dreg) {
3305                                         s390_xr  (code, ins->dreg, ins->sreg1);
3306                                 }
3307                                 else {
3308                                         s390_lr  (code, ins->dreg, ins->sreg1);
3309                                         s390_xr  (code, ins->dreg, ins->sreg2);
3310                                 }
3311                         }
3312                 }
3313                         break;
3314                 case OP_XOR_IMM:
3315                 case OP_IXOR_IMM: {
3316                         if (s390_is_imm16 (ins->inst_imm)) {
3317                                 s390_lhi  (code, s390_r0, ins->inst_imm);
3318                                 if (ins->dreg != ins->sreg1) {
3319                                         s390_lr   (code, ins->dreg, ins->sreg1);
3320                                 }
3321                                 s390_xr   (code, ins->dreg, s390_r0);
3322                         } else {
3323                                 s390_basr (code, s390_r13, 0);
3324                                 s390_j    (code, 4);
3325                                 s390_word (code, ins->inst_imm);
3326                                 if (ins->dreg != ins->sreg1) {
3327                                         s390_lr   (code, ins->dreg, ins->sreg1);
3328                                 }
3329                                 s390_x    (code, ins->dreg, 0, s390_r13, 4);
3330                         }
3331                 }
3332                         break;
3333                 case OP_ISHL: {
3334                         CHECK_SRCDST_NCOM;
3335                         s390_sll  (code, ins->dreg, src2, 0);
3336                 }
3337                         break;
3338                 case OP_SHL_IMM:
3339                 case OP_ISHL_IMM: {
3340                         if (ins->sreg1 != ins->dreg) {
3341                                 s390_lr   (code, ins->dreg, ins->sreg1);
3342                         }
3343                         s390_sll  (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3344                 }
3345                         break;
3346                 case OP_ISHR: {
3347                         CHECK_SRCDST_NCOM;
3348                         s390_sra  (code, ins->dreg, src2, 0);
3349                 }
3350                         break;
3351                 case OP_SHR_IMM:
3352                 case OP_ISHR_IMM: {
3353                         if (ins->sreg1 != ins->dreg) {
3354                                 s390_lr   (code, ins->dreg, ins->sreg1);
3355                         }
3356                         s390_sra  (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3357                 }
3358                         break;
3359                 case OP_SHR_UN_IMM:
3360                 case OP_ISHR_UN_IMM: {
3361                         if (ins->sreg1 != ins->dreg) {
3362                                 s390_lr   (code, ins->dreg, ins->sreg1);
3363                         }
3364                         s390_srl  (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3365                 }
3366                         break;
3367                 case OP_ISHR_UN: {
3368                         CHECK_SRCDST_NCOM;
3369                         s390_srl  (code, ins->dreg, src2, 0);
3370                 }
3371                         break;
3372                 case OP_INOT: {
3373                         if (ins->sreg1 != ins->dreg) {
3374                                 s390_lr   (code, ins->dreg, ins->sreg1);
3375                         }
3376                         s390_lhi (code, s390_r0, -1);
3377                         s390_xr  (code, ins->dreg, s390_r0);
3378                 }
3379                         break;
3380                 case OP_INEG: {
3381                         s390_lcr (code, ins->dreg, ins->sreg1);
3382                 }
3383                         break;
3384                 case OP_S390_LNEG: {
3385                         /* From gcc code */
3386                         g_assert (ins->dreg + 1 != ins->sreg1);
3387                         s390_lcr (code, ins->dreg + 1, ins->sreg2);
3388                         s390_lcr (code, ins->dreg, ins->sreg1);
3389                         s390_je (code, 3);
3390                         s390_bctr (code, ins->dreg + 1, 0);
3391                 }
3392                         break;
3393                 case OP_IMUL: {
3394                         if (ins->sreg1 == ins->dreg) {
3395                                 s390_msr  (code, ins->dreg, ins->sreg2);
3396                         }
3397                         else {
3398                                 if (ins->sreg2 == ins->dreg) {
3399                                         s390_msr (code, ins->dreg, ins->sreg1);
3400                                 }
3401                                 else {
3402                                         s390_lr  (code, ins->dreg, ins->sreg1);
3403                                         s390_msr (code, ins->dreg, ins->sreg2);
3404                                 }
3405                         }
3406                 }
3407                         break;
3408                 case OP_MUL_IMM:
3409                 case OP_IMUL_IMM: {
3410                         if (s390_is_imm16 (ins->inst_imm)) {
3411                                 s390_lhi  (code, s390_r13, ins->inst_imm);
3412                         } else {
3413                                 s390_basr (code, s390_r13, 0);
3414                                 s390_j    (code, 4);
3415                                 s390_word (code, ins->inst_imm);
3416 //                              if (ins->dreg != ins->sreg1) {
3417 //                                      s390_lr   (code, ins->dreg, ins->sreg1);
3418 //                              }
3419                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3420                         }
3421                         if (ins->dreg != ins->sreg1) {
3422                                 s390_lr   (code, ins->dreg, ins->sreg1);
3423                         }
3424                         s390_msr  (code, ins->dreg, s390_r13);
3425                 }
3426                         break;
3427                 case OP_IMUL_OVF: {
3428                         short int *o[2];
3429                         s390_ltr  (code, s390_r1, ins->sreg1);
3430                         s390_jz   (code, 0); CODEPTR(code, o[0]);
3431                         s390_ltr  (code, s390_r0, ins->sreg2);
3432                         s390_jnz  (code, 6);
3433                         s390_lhi  (code, s390_r1, 0);
3434                         s390_j    (code, 0); CODEPTR(code, o[1]);
3435                         s390_xr   (code, s390_r0, s390_r1);
3436                         s390_msr  (code, s390_r1, ins->sreg2);
3437                         s390_xr   (code, s390_r0, s390_r1);
3438                         s390_srl  (code, s390_r0, 0, 31);
3439                         s390_ltr  (code, s390_r0, s390_r0);
3440                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3441                         PTRSLOT   (code, o[0]);
3442                         PTRSLOT   (code, o[1]);
3443                         s390_lr   (code, ins->dreg, s390_r1);
3444                 }
3445                         break;
3446                 case OP_IMUL_OVF_UN: {
3447                         s390_lhi  (code, s390_r0, 0);
3448                         s390_lr   (code, s390_r1, ins->sreg1);
3449                         s390_mlr  (code, s390_r0, ins->sreg2);
3450                         s390_ltr  (code, s390_r0, s390_r0);
3451                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3452                         s390_lr   (code, ins->dreg, s390_r1);
3453                 }
3454                         break;
3455                 case OP_LMUL: {
3456                         s390_l    (code, s390_r0, 0, ins->sreg1, 4);
3457                         s390_srda (code, s390_r0, 0, 32);
3458                         s390_m    (code, s390_r0, 0, ins->sreg2, 4);
3459                         s390_l    (code, s390_r0, 0, ins->sreg1, 4);
3460                         s390_srl  (code, s390_r0, 0, 31);
3461                         s390_a    (code, s390_r0, 0, ins->sreg1, 0);
3462                         s390_l    (code, s390_r13, 0, ins->sreg2, 0);
3463                         s390_srl  (code, s390_r13, 0, 31);
3464                         s390_ms   (code, s390_r13, 0, ins->sreg1, 4);
3465                         s390_ar   (code, s390_r0, s390_r13);
3466                         s390_st   (code, s390_r0, 0, ins->dreg, 0);
3467                         s390_st   (code, s390_r1, 0, ins->dreg, 4);
3468                 }
3469                         break;
3470                 case OP_ICONST: {
3471                         if (s390_is_imm16(ins->inst_c0)) {
3472                                 s390_lhi  (code, ins->dreg, ins->inst_c0);
3473                         } else {
3474                                 s390_basr (code, s390_r13, 0);
3475                                 s390_j    (code, 4);
3476                                 s390_word (code, ins->inst_c0);
3477                                 s390_l    (code, ins->dreg, 0, s390_r13, 4);
3478                         }
3479                 }
3480                         break;
3481                 case OP_AOTCONST: {
3482                         s390_basr (code, s390_r13, 0);
3483                         s390_j    (code, 4);
3484                         mono_add_patch_info (cfg, code - cfg->native_code,
3485                                 (MonoJumpInfoType)ins->inst_i1, ins->inst_p0);
3486                         s390_word (code, 0);
3487                         s390_l    (code,ins->dreg, 0, s390_r13, 4);
3488                 }
3489                         break;
3490                 case OP_JUMP_TABLE: {
3491                         mono_add_patch_info (cfg, code - cfg->native_code,
3492                                 (MonoJumpInfoType)ins->inst_i1, ins->inst_p0);
3493                         s390_basr (code, s390_r13, 0);
3494                         s390_j    (code, 4);
3495                         s390_word (code, 0);
3496                         s390_l    (code, ins->dreg, 0, s390_r13, 4);
3497                 }
3498                         break;
3499                 case OP_ICONV_TO_I4:
3500                 case OP_ICONV_TO_U4:
3501                 case OP_MOVE: {
3502                         if (ins->dreg != ins->sreg1) {
3503                                 s390_lr (code, ins->dreg, ins->sreg1);
3504                         }
3505                 }
3506                         break;
3507                 case OP_SETLRET: {
3508                         int saved = ins->sreg1;
3509                         if (ins->sreg1 == s390_r2) {
3510                                 s390_lr (code, s390_r0, ins->sreg1);
3511                                 saved = s390_r0;
3512                         }
3513                         if (ins->sreg2 != s390_r2)
3514                                 s390_lr (code, s390_r2, ins->sreg2);
3515                         if (saved != s390_r3)
3516                                 s390_lr (code, s390_r3, saved);
3517                         break;
3518                 }
3519                 case OP_FMOVE: {
3520                         if (ins->dreg != ins->sreg1) {
3521                                 s390_ldr   (code, ins->dreg, ins->sreg1);
3522                         }
3523                 }
3524                         break;
3525                 case OP_S390_SETF4RET: {
3526                         s390_ledbr (code, ins->dreg, ins->sreg1);
3527                 }
3528                         break;
3529                 case OP_TLS_GET: {
3530                         if (s390_is_imm16 (ins->inst_offset)) {
3531                                 s390_lhi (code, s390_r13, ins->inst_offset);
3532                         } else {
3533                                 s390_bras (code, s390_r13, 0);
3534                                 s390_j    (code, 4);
3535                                 s390_word (code, ins->inst_offset);
3536                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3537                         }
3538                         s390_ear (code, s390_r1, 0);
3539                         s390_l   (code, ins->dreg, s390_r13, s390_r1, 0);
3540                 }
3541                         break;
3542                 case OP_FCONV_TO_R4: {
3543                         // FIXME:
3544                         if (ins->dreg != ins->sreg1) {
3545                                 s390_ldr   (code, ins->dreg, ins->sreg1);
3546                         }
3547                         /*
3548                         NOT_IMPLEMENTED;
3549                         if ((ins->next) &&
3550                              (ins->next->opcode != OP_FMOVE) &&
3551                              (ins->next->opcode != OP_STORER4_MEMBASE_REG))
3552                                 s390_ledbr (code, ins->dreg, ins->sreg1);
3553                         */
3554                 }
3555                         break;
3556                 case OP_JMP: {
3557                         if (cfg->method->save_lmf)
3558                                 restoreLMF(code, cfg->frame_reg, cfg->stack_usage);
3559
3560                         if (cfg->flags & MONO_CFG_HAS_TAIL) {
3561                                 code = emit_load_volatile_registers(code, cfg);
3562                         }
3563
3564                         code = backUpStackPtr(cfg, code, STK_BASE);
3565                         s390_l   (code, s390_r14, 0, STK_BASE, S390_RET_ADDR_OFFSET);
3566                         mono_add_patch_info (cfg, code - cfg->native_code,
3567                                              MONO_PATCH_INFO_METHOD_JUMP,
3568                                              ins->inst_p0);
3569                         s390_jcl (code, S390_CC_UN, 0);
3570                 }
3571                         break;
3572                 case OP_CHECK_THIS: {
3573                         /* ensure ins->sreg1 is not NULL */
3574                         s390_icm (code, s390_r0, 15, ins->sreg1, 0);
3575                 }
3576                         break;
3577                 case OP_ARGLIST: {
3578                         int offset = cfg->sig_cookie + cfg->stack_usage;
3579
3580                         if (s390_is_imm16 (offset))
3581                                 s390_lhi  (code, s390_r0, offset);
3582                         else {
3583                                 s390_basr (code, s390_r13, 0);
3584                                 s390_j    (code, 4);
3585                                 s390_word (code, offset);
3586                                 s390_l    (code, s390_r0, 0, s390_r13, 0);
3587                         }
3588                         s390_ar   (code, s390_r0, cfg->frame_reg);
3589                         s390_st   (code, s390_r0, 0, ins->sreg1, 0);
3590                 }
3591                         break;
3592                 case OP_FCALL: {
3593                         call = (MonoCallInst*)ins;
3594                         if (ins->flags & MONO_INST_HAS_METHOD)
3595                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_METHOD,
3596                                                      call->method);
3597                         else
3598                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS,
3599                                                      call->fptr);
3600                         s390_brasl (code, s390_r14, 0);
3601                         if (call->signature->ret->type == MONO_TYPE_R4)
3602                                 s390_ldebr (code, s390_f0, s390_f0);
3603                 }
3604                         break;
3605                 case OP_LCALL:
3606                 case OP_VCALL:
3607                 case OP_VCALL2:
3608                 case OP_VOIDCALL:
3609                 case OP_CALL: {
3610                         call = (MonoCallInst*)ins;
3611                         if (ins->flags & MONO_INST_HAS_METHOD)
3612                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_METHOD, call->method);
3613                         else
3614                                 mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS, call->fptr);
3615                         s390_brasl (code, s390_r14, 0);
3616                 }
3617                         break;
3618                 case OP_FCALL_REG: {
3619                         call = (MonoCallInst*)ins;
3620                         s390_lr   (code, s390_r1, ins->sreg1);
3621                         s390_basr (code, s390_r14, s390_r1);
3622                         if (call->signature->ret->type == MONO_TYPE_R4)
3623                                 s390_ldebr (code, s390_f0, s390_f0);
3624                 }
3625                         break;
3626                 case OP_LCALL_REG:
3627                 case OP_VCALL_REG:
3628                 case OP_VCALL2_REG:
3629                 case OP_VOIDCALL_REG:
3630                 case OP_CALL_REG: {
3631                         s390_lr   (code, s390_r1, ins->sreg1);
3632                         s390_basr (code, s390_r14, s390_r1);
3633                 }
3634                         break;
3635                 case OP_LCALL_MEMBASE:
3636                 case OP_VCALL_MEMBASE:
3637                 case OP_VCALL2_MEMBASE:
3638                 case OP_VOIDCALL_MEMBASE:
3639                 case OP_FCALL_MEMBASE:
3640                 case OP_CALL_MEMBASE: {
3641                         call = (MonoCallInst*)ins;
3642                         if (s390_is_uimm12(ins->inst_offset))
3643                                 s390_l    (code, s390_r1, 0, ins->inst_basereg, ins->inst_offset);
3644                         else {
3645                                 if (s390_is_imm16(ins->inst_offset)) {
3646                                         s390_lhi (code, s390_r13, ins->inst_offset);
3647                                         s390_l   (code, s390_r1, s390_r13, ins->inst_basereg, 0);
3648                                 } else {
3649                                         s390_basr (code, s390_r13, 0);
3650                                         s390_j    (code, 4);
3651                                         s390_word (code, ins->inst_offset);
3652                                         s390_l    (code, s390_r13, 0, s390_r13, 4);
3653                                         s390_l    (code, s390_r1, s390_r13, ins->inst_basereg, 0);
3654                                 }
3655                         }
3656                         s390_basr (code, s390_r14, s390_r1);
3657                         if (ins->opcode == OP_FCALL_MEMBASE && call->signature->ret->type == MONO_TYPE_R4)
3658                                 s390_ldebr (code, s390_f0, s390_f0);
3659                 }
3660                         break;
3661                 case OP_LOCALLOC: {
3662                         /*------------------------------------------*/
3663                         /* To allocate space on the stack we have   */
3664                         /* to allow room for parameters passed in   */
3665                         /* calls, the backchain pointer and round   */
3666                         /* it to our stack alignment requirements   */
3667                         /*------------------------------------------*/
3668                         int alloca_skip = S390_MINIMAL_STACK_SIZE + cfg->param_area;
3669                         int area_offset = S390_ALIGN(alloca_skip, S390_STACK_ALIGNMENT);
3670                         s390_lr   (code, s390_r1, ins->sreg1);
3671                         if (ins->flags & MONO_INST_INIT)
3672                                 s390_lr   (code, s390_r0, ins->sreg1);
3673                         s390_ahi  (code, s390_r1, 14);
3674                         s390_srl  (code, s390_r1, 0, 3);
3675                         s390_sll  (code, s390_r1, 0, 3);
3676                         if (cfg->method->save_lmf) {
3677                                 /*----------------------------------*/
3678                                 /* we have to adjust lmf ebp value  */
3679                                 /*----------------------------------*/
3680                                 int lmfOffset = cfg->stack_usage - sizeof(MonoLMF);
3681
3682                                 s390_lr (code, s390_r13, cfg->frame_reg);
3683                                 if (s390_is_uimm16(lmfOffset))
3684                                         s390_ahi   (code, s390_r13, lmfOffset);
3685                                 else {
3686                                         s390_basr (code, s390_r14, 0);
3687                                         s390_j    (code, 4);
3688                                         s390_word (code, lmfOffset);
3689                                         s390_a    (code, s390_r13, 0, s390_r14, 4);
3690                                 }
3691                                 s390_lr (code, s390_r14, STK_BASE);
3692                                 s390_sr (code, s390_r14, s390_r1);
3693                                 s390_st (code, s390_r14, 0, s390_r13,
3694                                          G_STRUCT_OFFSET(MonoLMF, ebp));
3695                         }
3696                         s390_l    (code, s390_r13, 0, STK_BASE, 0);
3697                         s390_sr   (code, STK_BASE, s390_r1);
3698                         s390_st   (code, s390_r13, 0, STK_BASE, 0);
3699                         s390_la   (code, ins->dreg, 0, STK_BASE, area_offset);
3700                         s390_srl  (code, ins->dreg, 0, 3);
3701                         s390_sll  (code, ins->dreg, 0, 3);
3702                         if (ins->flags & MONO_INST_INIT) {
3703                                 s390_lr   (code, s390_r1, s390_r0);
3704                                 s390_lr   (code, s390_r0, ins->dreg);
3705                                 s390_lr   (code, s390_r14, s390_r12);
3706                                 s390_lhi  (code, s390_r13, 0);
3707                                 s390_mvcle(code, s390_r0, s390_r12, 0, 0);
3708                                 s390_jo   (code, -2);
3709                                 s390_lr   (code, s390_r12, s390_r14);
3710                         }
3711                 }
3712                         break;
3713                 case OP_THROW: {
3714                         s390_lr (code, s390_r2, ins->sreg1);
3715                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD,
3716                                              (gpointer)"mono_arch_throw_exception");
3717                         s390_brasl (code, s390_r14, 0);
3718                 }
3719                         break;
3720                 case OP_RETHROW: {
3721                         s390_lr (code, s390_r2, ins->sreg1);
3722                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD,
3723                                              (gpointer)"mono_arch_rethrow_exception");
3724                         s390_brasl (code, s390_r14, 0);
3725                 }
3726                         break;
3727                 case OP_START_HANDLER: {
3728                         MonoInst *spvar = mono_find_spvar_for_region (cfg, bb->region);
3729                         if (s390_is_uimm12 (spvar->inst_offset)) {
3730                                 s390_st   (code, s390_r14, 0,
3731                                            spvar->inst_basereg,
3732                                            spvar->inst_offset);
3733                         } else {
3734                                 s390_basr (code, s390_r13, 0);
3735                                 s390_j    (code, 4);
3736                                 s390_word (code, spvar->inst_offset);
3737                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3738                                 s390_st   (code, s390_r14, s390_r13,
3739                                                    spvar->inst_basereg, 0);
3740                         }
3741                 }
3742                         break;
3743                 case OP_ENDFILTER: {
3744                         MonoInst *spvar = mono_find_spvar_for_region (cfg, bb->region);
3745                         if (ins->sreg1 != s390_r2)
3746                                 s390_lr (code, s390_r2, ins->sreg1);
3747                         if (s390_is_uimm12 (spvar->inst_offset)) {
3748                                 s390_l  (code, s390_r14, 0, spvar->inst_basereg,
3749                                          spvar->inst_offset);
3750                         } else {
3751                                 s390_basr (code, s390_r13, 0);
3752                                 s390_j    (code, 4);
3753                                 s390_word (code, spvar->inst_offset);
3754                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3755                                 s390_l    (code, s390_r14, s390_r13,
3756                                                    spvar->inst_basereg, 0);
3757                         }
3758                         s390_br  (code, s390_r14);
3759                 }
3760                         break;
3761                 case OP_ENDFINALLY: {
3762                         MonoInst *spvar = mono_find_spvar_for_region (cfg, bb->region);
3763                         if (s390_is_uimm12 (spvar->inst_offset)) {
3764                                 s390_l  (code, s390_r14, 0, spvar->inst_basereg,
3765                                          spvar->inst_offset);
3766                         } else {
3767                                 s390_basr (code, s390_r13, 0);
3768                                 s390_j    (code, 4);
3769                                 s390_word (code, spvar->inst_offset);
3770                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3771                                 s390_l    (code, s390_r14, s390_r13,
3772                                                    spvar->inst_basereg, 0);
3773                         }
3774                         s390_br  (code, s390_r14);
3775                 }
3776                         break;
3777                 case OP_CALL_HANDLER: {
3778                         mono_add_patch_info (cfg, code-cfg->native_code,
3779                                              MONO_PATCH_INFO_BB, ins->inst_target_bb);
3780                         s390_brasl (code, s390_r14, 0);
3781                 }
3782                         break;
3783                 case OP_LABEL: {
3784                         ins->inst_c0 = code - cfg->native_code;
3785                 }
3786                         break;
3787                 case OP_RELAXED_NOP:
3788                 case OP_NOP:
3789                 case OP_DUMMY_USE:
3790                 case OP_DUMMY_STORE:
3791                 case OP_NOT_REACHED:
3792                 case OP_NOT_NULL: {
3793                 }
3794                         break;
3795                 case OP_BR:
3796                         EMIT_UNCOND_BRANCH(ins);
3797                         break;
3798                 case OP_BR_REG: {
3799                         s390_br  (code, ins->sreg1);
3800                 }
3801                         break;
3802                 case OP_CEQ:
3803                 case OP_ICEQ: {
3804                         s390_lhi (code, ins->dreg, 1);
3805                         s390_jz  (code, 4);
3806                         s390_lhi (code, ins->dreg, 0);
3807                 }
3808                         break;
3809                 case OP_CLT:
3810                 case OP_ICLT: {
3811                         s390_lhi (code, ins->dreg, 1);
3812                         s390_jl  (code, 4);
3813                         s390_lhi (code, ins->dreg, 0);
3814                 }
3815                         break;
3816                 case OP_CLT_UN:
3817                 case OP_ICLT_UN: {
3818                         s390_lhi (code, ins->dreg, 1);
3819                         s390_jlo (code, 4);
3820                         s390_lhi (code, ins->dreg, 0);
3821                 }
3822                         break;
3823                 case OP_CGT:
3824                 case OP_ICGT: {
3825                         s390_lhi (code, ins->dreg, 1);
3826                         s390_jh  (code, 4);
3827                         s390_lhi (code, ins->dreg, 0);
3828                 }
3829                         break;
3830                 case OP_CGT_UN:
3831                 case OP_ICGT_UN: {
3832                         s390_lhi (code, ins->dreg, 1);
3833                         s390_jho (code, 4);
3834                         s390_lhi (code, ins->dreg, 0);
3835                 }
3836                         break;
3837                 case OP_COND_EXC_EQ:
3838                 case OP_COND_EXC_IEQ:
3839                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_EQ, ins->inst_p1);
3840                         break;
3841                 case OP_COND_EXC_NE_UN:
3842                 case OP_COND_EXC_INE_UN:
3843                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NE, ins->inst_p1);
3844                         break;
3845                 case OP_COND_EXC_LT:
3846                 case OP_COND_EXC_ILT:
3847                 case OP_COND_EXC_LT_UN:
3848                 case OP_COND_EXC_ILT_UN:
3849                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, ins->inst_p1);
3850                         break;
3851                 case OP_COND_EXC_GT:
3852                 case OP_COND_EXC_IGT:
3853                 case OP_COND_EXC_GT_UN:
3854                 case OP_COND_EXC_IGT_UN:
3855                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GT, ins->inst_p1);
3856                         break;
3857                 case OP_COND_EXC_GE:
3858                 case OP_COND_EXC_IGE:
3859                 case OP_COND_EXC_GE_UN:
3860                 case OP_COND_EXC_IGE_UN:
3861                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GE, ins->inst_p1);
3862                         break;
3863                 case OP_COND_EXC_LE:
3864                 case OP_COND_EXC_ILE:
3865                 case OP_COND_EXC_LE_UN:
3866                 case OP_COND_EXC_ILE_UN:
3867                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LE, ins->inst_p1);
3868                         break;
3869                 case OP_COND_EXC_OV:
3870                 case OP_COND_EXC_IOV:
3871                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, ins->inst_p1);
3872                         break;
3873                 case OP_COND_EXC_NO:
3874                 case OP_COND_EXC_INO:
3875                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NO, ins->inst_p1);
3876                         break;
3877                 case OP_COND_EXC_C:
3878                 case OP_COND_EXC_IC:
3879                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, ins->inst_p1);
3880                         break;
3881                 case OP_COND_EXC_NC:
3882                 case OP_COND_EXC_INC:
3883                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, ins->inst_p1);
3884                         break;
3885                 case OP_IBEQ:
3886                         EMIT_COND_BRANCH (ins, S390_CC_EQ);
3887                         break;
3888                 case OP_IBNE_UN:
3889                         EMIT_COND_BRANCH (ins, S390_CC_NE);
3890                         break;
3891                 case OP_IBLT:
3892                 case OP_IBLT_UN:
3893                         EMIT_COND_BRANCH (ins, S390_CC_LT);
3894                         break;
3895                 case OP_IBGT:
3896                 case OP_IBGT_UN:
3897                         EMIT_COND_BRANCH (ins, S390_CC_GT);
3898                         break;
3899                 case OP_IBGE:
3900                 case OP_IBGE_UN:
3901                         EMIT_COND_BRANCH (ins, S390_CC_GE);
3902                         break;
3903                 case OP_IBLE:
3904                 case OP_IBLE_UN:
3905                         EMIT_COND_BRANCH (ins, S390_CC_LE);
3906                         break;
3907
3908                 /* floating point opcodes */
3909                 case OP_R8CONST: {
3910                         if (*((float *) ins->inst_p0) == 0) {
3911                                 s390_lzdr (code, ins->dreg);
3912                         } else {
3913                                 s390_basr  (code, s390_r13, 0);
3914                                 s390_j     (code, 4);
3915                                 s390_word  (code, ins->inst_p0);
3916                                 s390_l     (code, s390_r13, 0, s390_r13, 4);
3917                                 s390_ld    (code, ins->dreg, 0, s390_r13, 0);
3918                         }
3919                 }
3920                         break;
3921                 case OP_R4CONST: {
3922                         if (*((float *) ins->inst_p0) == 0) {
3923                                 s390_lzdr (code, ins->dreg);
3924                         } else {
3925                                 s390_basr (code, s390_r13, 0);
3926                                 s390_j    (code, 4);
3927                                 s390_word (code, ins->inst_p0);
3928                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3929                                 s390_ldeb (code, ins->dreg, 0, s390_r13, 0);
3930                         }
3931                 }
3932                         break;
3933                 case OP_STORER8_MEMBASE_REG: {
3934                         if (s390_is_uimm12(ins->inst_offset)) {
3935                                 s390_std  (code, ins->sreg1, 0, ins->inst_destbasereg, ins->inst_offset);
3936                         } else {
3937                                 s390_basr (code, s390_r13, 0);
3938                                 s390_j    (code, 4);
3939                                 s390_word (code, ins->inst_offset);
3940                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3941                                 s390_std  (code, ins->sreg1, s390_r13, ins->inst_destbasereg, 0);
3942                         }
3943                 }
3944                         break;
3945                 case OP_LOADR8_MEMBASE: {
3946                         if (s390_is_uimm12(ins->inst_offset)) {
3947                                 s390_ld   (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
3948                         } else {
3949                                 s390_basr (code, s390_r13, 0);
3950                                 s390_j    (code, 4);
3951                                 s390_word (code, ins->inst_offset);
3952                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3953                                 s390_ld   (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
3954                         }
3955                 }
3956                         break;
3957                 case OP_STORER4_MEMBASE_REG: {
3958                         if (s390_is_uimm12(ins->inst_offset)) {
3959                                 s390_ledbr(code, s390_f15, ins->sreg1);
3960                                 s390_ste  (code, s390_f15, 0, ins->inst_destbasereg, ins->inst_offset);
3961                         } else {
3962                                 s390_basr (code, s390_r13, 0);
3963                                 s390_j    (code, 4);
3964                                 s390_word (code, ins->inst_offset);
3965                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3966                                 s390_ledbr(code, s390_f15, ins->sreg1);
3967                                 s390_ste  (code, s390_f15, s390_r13, ins->inst_destbasereg, 0);
3968                         }
3969                 }
3970                         break;
3971                 case OP_LOADR4_MEMBASE: {
3972                         if (s390_is_uimm12(ins->inst_offset)) {
3973                                 s390_ldeb (code, ins->dreg, 0, ins->inst_basereg, ins->inst_offset);
3974                         } else {
3975                                 s390_basr (code, s390_r13, 0);
3976                                 s390_j    (code, 4);
3977                                 s390_word (code, ins->inst_offset);
3978                                 s390_l    (code, s390_r13, 0, s390_r13, 4);
3979                                 s390_ldeb (code, ins->dreg, s390_r13, ins->inst_basereg, 0);
3980                         }
3981                 }
3982                         break;
3983                 case OP_ICONV_TO_R_UN: {
3984                         s390_cdfbr (code, ins->dreg, ins->sreg1);
3985                         s390_ltr   (code, ins->sreg1, ins->sreg1);
3986                         s390_jnl   (code, 12);
3987                         s390_basr  (code, s390_r13, 0);
3988                         s390_j     (code, 6);
3989                         s390_word  (code, 0x41f00000);
3990                         s390_word  (code, 0);
3991                         s390_adb   (code, ins->dreg, 0, s390_r13, 4);
3992                 }
3993                         break;
3994                 case OP_ICONV_TO_R4: {
3995                         s390_cdfbr (code, ins->dreg, ins->sreg1);
3996                 }
3997                         break;
3998                 case OP_ICONV_TO_R8: {
3999                         s390_cdfbr (code, ins->dreg, ins->sreg1);
4000                 }
4001                         break;
4002                 case OP_FCONV_TO_I1:
4003                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 1, TRUE);
4004                         break;
4005                 case OP_FCONV_TO_U1:
4006                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 1, FALSE);
4007                         break;
4008                 case OP_FCONV_TO_I2:
4009                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 2, TRUE);
4010                         break;
4011                 case OP_FCONV_TO_U2:
4012                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 2, FALSE);
4013                         break;
4014                 case OP_FCONV_TO_I4:
4015                 case OP_FCONV_TO_I:
4016                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 4, TRUE);
4017                         break;
4018                 case OP_FCONV_TO_U4:
4019                 case OP_FCONV_TO_U:
4020                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 4, FALSE);
4021                         break;
4022                 case OP_FCONV_TO_I8:
4023                 case OP_FCONV_TO_U8:
4024                         g_assert_not_reached ();
4025                         /* Implemented as helper calls */
4026                         break;
4027                 case OP_LCONV_TO_R_UN:
4028                         g_assert_not_reached ();
4029                         /* Implemented as helper calls */
4030                         break;
4031                 case OP_LCONV_TO_OVF_I:
4032                 case OP_LCONV_TO_OVF_I4_2: {
4033                         /* Valid ints: 0xffffffff:8000000 to 00000000:0x7f000000 */
4034                         short int *o[5];
4035                         s390_ltr  (code, ins->sreg1, ins->sreg1);
4036                         s390_jnl  (code, 0); CODEPTR(code, o[0]);
4037                         s390_ltr  (code, ins->sreg2, ins->sreg2);
4038                         s390_jnl  (code, 0); CODEPTR(code, o[1]);
4039                         s390_lhi  (code, s390_r13, -1);
4040                         s390_cr   (code, ins->sreg2, s390_r13);
4041                         s390_jnz  (code, 0); CODEPTR(code, o[2]);
4042                         s390_j    (code, 0); CODEPTR(code, o[3]);
4043                         PTRSLOT(code, o[0]);
4044                         s390_ltr  (code, ins->sreg2, ins->sreg2);
4045                         s390_jz   (code, 0); CODEPTR(code, o[4]);
4046                         PTRSLOT(code, o[1]);
4047                         PTRSLOT(code, o[2]);
4048                         mono_add_patch_info (cfg, code - cfg->native_code,
4049                                              MONO_PATCH_INFO_EXC, "OverflowException");
4050                         s390_brasl (code, s390_r14, 0);
4051                         PTRSLOT(code, o[3]);
4052                         PTRSLOT(code, o[4]);
4053                         if (ins->dreg != ins->sreg1)
4054                                 s390_lr   (code, ins->dreg, ins->sreg1);
4055                 }
4056                         break;
4057                 case OP_SQRT: {
4058                         s390_sqdbr (code, ins->dreg, ins->sreg1);
4059                 }
4060                         break;
4061                 case OP_FADD: {
4062                         CHECK_SRCDST_COM_F;
4063                         s390_adbr (code, ins->dreg, src2);
4064                 }
4065                         break;
4066                 case OP_FSUB: {
4067                         CHECK_SRCDST_NCOM_F;
4068                         s390_sdbr (code, ins->dreg, src2);
4069                 }
4070                         break;
4071                 case OP_FMUL: {
4072                         CHECK_SRCDST_COM_F;
4073                         s390_mdbr (code, ins->dreg, src2);
4074                 }
4075                         break;
4076                 case OP_FDIV: {
4077                         CHECK_SRCDST_NCOM_F;
4078                         s390_ddbr (code, ins->dreg, src2);
4079                 }
4080                         break;
4081                 case OP_FNEG: {
4082                         s390_lcdbr (code, ins->dreg, ins->sreg1);
4083                 }
4084                         break;
4085                 case OP_FREM: {
4086                         CHECK_SRCDST_NCOM_F;
4087                         s390_didbr (code, ins->dreg, src2, 5, s390_f15);
4088                 }
4089                         break;
4090                 case OP_FCOMPARE: {
4091                         s390_cdbr (code, ins->sreg1, ins->sreg2);
4092                 }
4093                         break;
4094                 case OP_FCEQ: {
4095                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4096                         s390_lhi   (code, ins->dreg, 1);
4097                         s390_je    (code, 4);
4098                         s390_lhi   (code, ins->dreg, 0);
4099                 }
4100                         break;
4101                 case OP_FCLT: {
4102                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4103                         s390_lhi   (code, ins->dreg, 1);
4104                         s390_jl    (code, 4);
4105                         s390_lhi   (code, ins->dreg, 0);
4106                 }
4107                         break;
4108                 case OP_FCLT_UN: {
4109                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4110                         s390_lhi   (code, ins->dreg, 1);
4111                         s390_jlo   (code, 4);
4112                         s390_lhi   (code, ins->dreg, 0);
4113                 }
4114                         break;
4115                 case OP_FCGT: {
4116                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4117                         s390_lhi   (code, ins->dreg, 1);
4118                         s390_jh    (code, 4);
4119                         s390_lhi   (code, ins->dreg, 0);
4120                 }
4121                         break;
4122                 case OP_FCGT_UN: {
4123                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4124                         s390_lhi   (code, ins->dreg, 1);
4125                         s390_jho   (code, 4);
4126                         s390_lhi   (code, ins->dreg, 0);
4127                 }
4128                         break;
4129                 case OP_FBEQ: {
4130                         short *o;
4131                         s390_jo (code, 0); CODEPTR(code, o);
4132                         EMIT_COND_BRANCH (ins, S390_CC_EQ);
4133                         PTRSLOT(code, o);
4134                 }
4135                         break;
4136                 case OP_FBNE_UN:
4137                         EMIT_COND_BRANCH (ins, S390_CC_NE|S390_CC_OV);
4138                         break;
4139                 case OP_FBLT: {
4140                         short *o;
4141                         s390_jo (code, 0); CODEPTR(code, o);
4142                         EMIT_COND_BRANCH (ins, S390_CC_LT);
4143                         PTRSLOT(code, o);
4144                 }
4145                         break;
4146                 case OP_FBLT_UN:
4147                         EMIT_COND_BRANCH (ins, S390_CC_LT|S390_CC_OV);
4148                         break;
4149                 case OP_FBGT: {
4150                         short *o;
4151                         s390_jo (code, 0); CODEPTR(code, o);
4152                         EMIT_COND_BRANCH (ins, S390_CC_GT);
4153                         PTRSLOT(code, o);
4154                 }
4155                         break;
4156                 case OP_FBGT_UN:
4157                         EMIT_COND_BRANCH (ins, S390_CC_GT|S390_CC_OV);
4158                         break;
4159                 case OP_FBGE: {
4160                         short *o;
4161                         s390_jo (code, 0); CODEPTR(code, o);
4162                         EMIT_COND_BRANCH (ins, S390_CC_GE);
4163                         PTRSLOT(code, o);
4164                 }
4165                         break;
4166                 case OP_FBGE_UN:
4167                         EMIT_COND_BRANCH (ins, S390_CC_GE|S390_CC_OV);
4168                         break;
4169                 case OP_FBLE: {
4170                         short *o;
4171                         s390_jo (code, 0); CODEPTR(code, o);
4172                         EMIT_COND_BRANCH (ins, S390_CC_LE);
4173                         PTRSLOT(code, o);
4174                 }
4175                         break;
4176                 case OP_FBLE_UN:
4177                         EMIT_COND_BRANCH (ins, S390_CC_LE|S390_CC_OV);
4178                         break;
4179                 case OP_CKFINITE: {
4180                         short *o;
4181                         s390_lhi  (code, s390_r13, 0x7f);
4182                         s390_tcdb (code, ins->sreg1, 0, s390_r13, 0);
4183                         s390_jz   (code, 0); CODEPTR(code, o);
4184                         mono_add_patch_info (cfg, code - cfg->native_code,
4185                                              MONO_PATCH_INFO_EXC, "ArithmeticException");
4186                         s390_brasl (code, s390_r14,0);
4187                         PTRSLOT(code, o);
4188                 }
4189                         break;
4190                 case OP_S390_MOVE: {
4191                         if (ins->backend.size > 0) {
4192                                 if (ins->backend.size <= 256) {
4193                                         s390_mvc  (code, ins->backend.size, ins->dreg,
4194                                                    ins->inst_offset, ins->sreg1, ins->inst_imm);
4195                                 } else {
4196                                         s390_lr   (code, s390_r0, ins->dreg);
4197                                         if (s390_is_imm16 (ins->inst_offset)) {
4198                                                 s390_ahi  (code, s390_r0, ins->inst_offset);
4199                                         } else {
4200                                                 s390_basr (code, s390_r13, 0);
4201                                                 s390_j    (code, 4);
4202                                                 s390_word (code, ins->inst_offset);
4203                                                 s390_a    (code, s390_r0, 0, s390_r13, 4);
4204                                         }
4205                                         s390_lr   (code, s390_r14, s390_r12);
4206                                         s390_lr   (code, s390_r12, ins->sreg1);
4207                                         if (s390_is_imm16 (ins->inst_imm)) {
4208                                                 s390_ahi  (code, s390_r12, ins->inst_imm);
4209                                         } else {
4210                                                 s390_basr (code, s390_r13, 0);
4211                                                 s390_j    (code, 4);
4212                                                 s390_word (code, ins->inst_imm);
4213                                                 s390_a    (code, s390_r12, 0, s390_r13, 4);
4214                                         }
4215                                         s390_lr   (code, s390_r1, ins->sreg1);
4216                                         s390_lr   (code, s390_r13, s390_r1);
4217                                         s390_mvcle(code, s390_r0, s390_r12, 0, 0);
4218                                         s390_jo   (code, -2);
4219                                         s390_lr   (code, s390_r12, s390_r14);
4220                                 }
4221                         }
4222                 }
4223                         break;
4224                 case OP_ATOMIC_ADD_I4: {
4225                         s390_lr  (code, s390_r1, ins->sreg2);
4226                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4227                         s390_a   (code, s390_r1, 0, ins->inst_basereg, ins->inst_offset);
4228                         s390_cs  (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
4229                         s390_jnz (code, -7);
4230                         s390_lr  (code, ins->dreg, s390_r1);
4231                 }
4232                         break;
4233                 case OP_ATOMIC_ADD_NEW_I4: {
4234                         s390_lr  (code, s390_r1, ins->sreg2);
4235                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4236                         s390_a   (code, s390_r1, 0, ins->inst_basereg, ins->inst_offset);
4237                         s390_cs  (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
4238                         s390_jnz (code, -7);
4239                         s390_lr  (code, ins->dreg, s390_r1);
4240                 }
4241                         break;
4242                 case OP_ATOMIC_EXCHANGE_I4: {
4243                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4244                         s390_cs  (code, s390_r0, ins->sreg2, ins->inst_basereg, ins->inst_offset);
4245                         s390_jnz (code, -4);
4246                         s390_lr  (code, ins->dreg, s390_r0);
4247                 }
4248                         break;
4249                 case OP_S390_BKCHAIN: {
4250                         s390_lr  (code, ins->dreg, ins->sreg1);
4251                         if (s390_is_imm16 (cfg->stack_offset)) {
4252                                 s390_ahi (code, ins->dreg, cfg->stack_offset);
4253                         } else {
4254                                 s390_basr (code, s390_r13, 0);
4255                                 s390_j    (code, 6);
4256                                 s390_word (code, cfg->stack_offset);
4257                                 s390_a    (code, ins->dreg, 0, s390_r13, 4);
4258                         }
4259                 }
4260                 case OP_MEMORY_BARRIER: {
4261                 }
4262                         break;
4263                 default:
4264                         g_warning ("unknown opcode %s in %s()\n", mono_inst_name (ins->opcode), __FUNCTION__);
4265                         g_assert_not_reached ();
4266                 }
4267
4268                 if ((cfg->opt & MONO_OPT_BRANCH) && ((code - cfg->native_code - offset) > max_len)) {
4269                         g_warning ("wrong maximal instruction length of instruction %s (expected %d, got %d)",
4270                                    mono_inst_name (ins->opcode), max_len, code - cfg->native_code - offset);
4271                         g_assert_not_reached ();
4272                 }
4273
4274                 cpos += max_len;
4275
4276                 last_ins = ins;
4277                 last_offset = offset;
4278         }
4279
4280         cfg->code_len = code - cfg->native_code;
4281 }
4282
4283 /*========================= End of Function ========================*/
4284
4285 /*------------------------------------------------------------------*/
4286 /*                                                                  */
4287 /* Name         - mono_arch_register_lowlevel_calls                 */
4288 /*                                                                  */
4289 /* Function     - Register routines to help with --trace operation. */
4290 /*                                                                  */
4291 /*------------------------------------------------------------------*/
4292
4293 void
4294 mono_arch_register_lowlevel_calls (void)
4295 {
4296         mono_register_jit_icall (mono_arch_get_lmf_addr, "mono_arch_get_lmf_addr", NULL, TRUE);
4297 }
4298
4299 /*========================= End of Function ========================*/
4300
4301 /*------------------------------------------------------------------*/
4302 /*                                                                  */
4303 /* Name         - mono_arch_patch_code                              */
4304 /*                                                                  */
4305 /* Function     - Process the patch data created during the         */
4306 /*                instruction build process. This resolves jumps,   */
4307 /*                calls, variables etc.                             */
4308 /*                                                                  */
4309 /*------------------------------------------------------------------*/
4310
4311 void
4312 mono_arch_patch_code (MonoMethod *method, MonoDomain *domain,
4313                       guint8 *code, MonoJumpInfo *ji, gboolean run_cctors)
4314 {
4315         MonoJumpInfo *patch_info;
4316
4317         for (patch_info = ji; patch_info; patch_info = patch_info->next) {
4318                 unsigned char *ip = patch_info->ip.i + code;
4319                 gconstpointer target = NULL;
4320
4321                 target = mono_resolve_patch_target (method, domain, code,
4322                                                     patch_info, run_cctors);
4323
4324                 switch (patch_info->type) {
4325                         case MONO_PATCH_INFO_IP:
4326                         case MONO_PATCH_INFO_EXC_NAME:
4327                         case MONO_PATCH_INFO_LDSTR:
4328                         case MONO_PATCH_INFO_TYPE_FROM_HANDLE:
4329                         case MONO_PATCH_INFO_LDTOKEN:
4330                         case MONO_PATCH_INFO_EXC:
4331                                 continue;
4332                         case MONO_PATCH_INFO_SWITCH:
4333                                 /*----------------------------------*/
4334                                 /* ip points at the basr r13,0/j +4 */
4335                                 /* instruction the vtable value     */
4336                                 /* follows this (i.e. ip+6)         */
4337                                 /*----------------------------------*/
4338                                 *((gconstpointer *)(ip+6)) = target;
4339                                 target = NULL;
4340                                 continue;
4341                         case MONO_PATCH_INFO_METHODCONST:
4342                         case MONO_PATCH_INFO_CLASS:
4343                         case MONO_PATCH_INFO_IMAGE:
4344                         case MONO_PATCH_INFO_FIELD:
4345                         case MONO_PATCH_INFO_IID:
4346                                 target = S390_RELATIVE(target, ip);
4347                                 continue;
4348                         case MONO_PATCH_INFO_R4:
4349                         case MONO_PATCH_INFO_R8:
4350                         case MONO_PATCH_INFO_METHOD_REL:
4351                                 g_assert_not_reached ();
4352                                 continue;
4353                         default:
4354                                 target = S390_RELATIVE(target, ip);
4355                                 ip += 2;
4356                 }
4357                 s390_patch (ip, (guint32) target);
4358         }
4359 }
4360
4361 /*========================= End of Function ========================*/
4362
4363 /*------------------------------------------------------------------*/
4364 /*                                                                  */
4365 /* Name         - emit_load_volatile_registers                      */
4366 /*                                                                  */
4367 /* Function     - Create the instruction sequence for loading the   */
4368 /*                parameter registers for use with the 'tail' op.   */
4369 /*                                                                  */
4370 /*                The register loading operations performed here    */
4371 /*                are the mirror of the store operations performed  */
4372 /*                in mono_arch_emit_prolog and need to be kept in   */
4373 /*                synchronization with it.                          */
4374 /*                                                                  */
4375 /*------------------------------------------------------------------*/
4376
4377 guint8 *
4378 emit_load_volatile_registers (guint8 * code, MonoCompile *cfg)
4379 {
4380         MonoMethod *method = cfg->method;
4381         MonoMethodSignature *sig;
4382         MonoInst *inst;
4383         int pos, i;
4384         CallInfo *cinfo;
4385
4386         sig = mono_method_signature (method);
4387         pos = 0;
4388
4389         cinfo = get_call_info (cfg, cfg->mempool, sig, sig->pinvoke);
4390
4391         if (cinfo->struct_ret) {
4392                 ArgInfo *ainfo = &cinfo->ret;
4393                 inst         = cfg->vret_addr;
4394                 s390_l (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4395         }
4396
4397         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
4398                 ArgInfo *ainfo = cinfo->args + i;
4399                 inst = cfg->args [pos];
4400
4401                 if (inst->opcode == OP_REGVAR) {
4402                         if (ainfo->regtype == RegTypeGeneral)
4403                                 s390_lr (code, ainfo->reg, inst->dreg);
4404                         else if (ainfo->regtype == RegTypeFP) {
4405                                 if (inst->dreg != ainfo->reg) {
4406                                         if (ainfo->size == 4) {
4407                                                 s390_ldebr (code, ainfo->reg, inst->dreg);
4408                                         } else {
4409                                                 s390_ldr   (code, ainfo->reg, inst->dreg);
4410                                         }
4411                                 }
4412                         }
4413                         else if (ainfo->regtype == RegTypeBase) {
4414                         } else
4415                                 g_assert_not_reached ();
4416                 } else {
4417                         if (ainfo->regtype == RegTypeGeneral) {
4418                                 if (!((ainfo->reg >= 2) && (ainfo->reg <= 6)))
4419                                         g_assert_not_reached();
4420                                 switch (ainfo->size) {
4421                                 case 1:
4422                                         s390_ic (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4423                                         break;
4424                                 case 2:
4425                                         s390_lh (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4426                                         break;
4427                                 case 8:
4428                                         s390_lm (code, ainfo->reg, ainfo->reg + 1,
4429                                                   inst->inst_basereg, inst->inst_offset);
4430                                         break;
4431                                 default:
4432                                         s390_l  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4433                                 }
4434                         } else if (ainfo->regtype == RegTypeBase) {
4435                         } else if (ainfo->regtype == RegTypeFP) {
4436                                 if (ainfo->size == 8)
4437                                         s390_ld (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4438                                 else if (ainfo->size == 4)
4439                                         s390_le (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4440                                 else
4441                                         g_assert_not_reached ();
4442                         } else if (ainfo->regtype == RegTypeStructByVal) {
4443                                 if (ainfo->reg != STK_BASE) {
4444                                         switch (ainfo->size) {
4445                                         case 1:
4446                                                 s390_ic (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4447                                                 break;
4448                                         case 2:
4449                                                 s390_lh (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4450                                                 break;
4451                                         case 4:
4452                                                 s390_l  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4453                                                 break;
4454                                         case 8:
4455                                                 s390_lm (code, ainfo->reg, ainfo->reg+1, inst->inst_basereg, inst->inst_offset);
4456                                                 break;
4457                                         }
4458                                 }
4459                         } else if (ainfo->regtype == RegTypeStructByAddr) {
4460                                 if (ainfo->reg != STK_BASE) {
4461                                         s390_l  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4462                                 }
4463                         } else
4464                                 g_assert_not_reached ();
4465                 }
4466                 pos++;
4467         }
4468
4469         return code;
4470 }
4471
4472 /*========================= End of Function ========================*/
4473
4474 /*------------------------------------------------------------------*/
4475 /*                                                                  */
4476 /* Name         - mono_arch_emit_prolog                             */
4477 /*                                                                  */
4478 /* Function     - Create the instruction sequence for a function    */
4479 /*                prolog.                                           */
4480 /*                                                                  */
4481 /*------------------------------------------------------------------*/
4482
4483 guint8 *
4484 mono_arch_emit_prolog (MonoCompile *cfg)
4485 {
4486         MonoMethod *method = cfg->method;
4487         MonoBasicBlock *bb;
4488         MonoMethodSignature *sig;
4489         MonoInst *inst;
4490         int alloc_size, pos, max_offset, i;
4491         guint8 *code;
4492         CallInfo *cinfo;
4493         int tracing = 0;
4494         int lmfOffset;                                                          \
4495
4496         if (mono_jit_trace_calls != NULL && mono_trace_eval (method))
4497                 tracing = 1;
4498
4499         cfg->code_size   = 1024;
4500         cfg->native_code = code = g_malloc (cfg->code_size);
4501
4502         s390_stm  (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
4503
4504         if (cfg->arch.bkchain_reg != -1)
4505                 s390_lr (code, cfg->arch.bkchain_reg, STK_BASE);
4506
4507         if (cfg->flags & MONO_CFG_HAS_ALLOCA) {
4508                 cfg->used_int_regs |= 1 << 11;
4509         }
4510
4511         alloc_size = cfg->stack_offset;
4512
4513         cfg->stack_usage = alloc_size;
4514         s390_lr   (code, s390_r11, STK_BASE);
4515         if (s390_is_uimm16 (alloc_size)) {
4516                 s390_ahi  (code, STK_BASE, -alloc_size);
4517         } else {
4518                 int stackSize = alloc_size;
4519                 while (stackSize > 32767) {
4520                         s390_ahi  (code, STK_BASE, -32767);
4521                         stackSize -= 32767;
4522                 }
4523                 s390_ahi  (code, STK_BASE, -stackSize);
4524         }
4525         s390_st   (code, s390_r11, 0, STK_BASE, 0);
4526
4527         if (cfg->frame_reg != STK_BASE)
4528                 s390_lr (code, s390_r11, STK_BASE);
4529
4530         /* compute max_offset in order to use short forward jumps
4531          * we always do it on s390 because the immediate displacement
4532          * for jumps is too small
4533          */
4534         max_offset = 0;
4535         for (bb = cfg->bb_entry; bb; bb = bb->next_bb) {
4536                 MonoInst *ins = bb->code;
4537                 bb->max_offset = max_offset;
4538
4539                 if (cfg->prof_options & MONO_PROFILE_COVERAGE)
4540                         max_offset += 6;
4541
4542                 MONO_BB_FOR_EACH_INS (bb, ins)
4543                         max_offset += ((guint8 *)ins_get_spec (ins->opcode))[MONO_INST_LEN];
4544         }
4545
4546         /* load arguments allocated to register from the stack */
4547         sig = mono_method_signature (method);
4548         pos = 0;
4549
4550         cinfo = get_call_info (cfg, cfg->mempool, sig, sig->pinvoke);
4551
4552         if (cinfo->struct_ret) {
4553                 ArgInfo *ainfo = &cinfo->ret;
4554                 inst         = cfg->vret_addr;
4555                 inst->backend.size = ainfo->vtsize;
4556                 s390_st (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4557         }
4558
4559         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
4560                 ArgInfo *ainfo = cinfo->args + i;
4561                 inst = cfg->args [pos];
4562
4563                 if (inst->opcode == OP_VTARG_ADDR)
4564                         inst = inst->inst_left;
4565
4566                 if (inst->opcode == OP_REGVAR) {
4567                         if (ainfo->regtype == RegTypeGeneral)
4568                                 s390_lr (code, inst->dreg, ainfo->reg);
4569                         else if (ainfo->regtype == RegTypeFP) {
4570                                 if (inst->dreg != ainfo->reg) {
4571                                         if (ainfo->size == 4) {
4572                                                 s390_ledbr (code, inst->dreg, ainfo->reg);
4573                                         } else {
4574                                                 s390_ldr   (code, inst->dreg, ainfo->reg);
4575                                         }
4576                                 }
4577                         }
4578                         else if (ainfo->regtype == RegTypeBase) {
4579                                 s390_lr  (code, s390_r13, STK_BASE);
4580                                 s390_ahi (code, s390_r13, alloc_size);
4581                                 s390_l   (code, inst->dreg, 0, s390_r13, ainfo->offset);
4582                         } else
4583                                 g_assert_not_reached ();
4584
4585                         if (cfg->verbose_level > 2)
4586                                 g_print ("Argument %d assigned to register %s\n",
4587                                          pos, mono_arch_regname (inst->dreg));
4588                 } else {
4589                         if (ainfo->regtype == RegTypeGeneral) {
4590                                 if (!((ainfo->reg >= 2) && (ainfo->reg <= 6)))
4591                                         g_assert_not_reached();
4592                                 switch (ainfo->size) {
4593                                 case 1:
4594                                         s390_stc (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4595                                         break;
4596                                 case 2:
4597                                         s390_sth (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4598                                         break;
4599                                 case 8:
4600                                         s390_stm (code, ainfo->reg, ainfo->reg + 1,
4601                                                   inst->inst_basereg, inst->inst_offset);
4602                                         break;
4603                                 default:
4604                                         s390_st  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4605                                 }
4606                         } else if (ainfo->regtype == RegTypeBase) {
4607                         } else if (ainfo->regtype == RegTypeFP) {
4608                                 if (ainfo->size == 8)
4609                                         s390_std (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4610                                 else if (ainfo->size == 4)
4611                                         s390_ste (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4612                                 else
4613                                         g_assert_not_reached ();
4614                         } else if (ainfo->regtype == RegTypeStructByVal) {
4615                                 int doffset = inst->inst_offset;
4616                                 int reg;
4617                                 if (ainfo->reg != STK_BASE)
4618                                         reg = ainfo->reg;
4619                                 else {
4620                                         reg = s390_r0;
4621                                         s390_lr  (code, s390_r13, STK_BASE);
4622                                         s390_ahi (code, s390_r13, alloc_size);
4623                                 }
4624                                 switch (ainfo->size) {
4625                                         case 1:
4626                                                 if (ainfo->reg == STK_BASE)
4627                                                         s390_ic  (code, reg, 0, s390_r13, ainfo->offset+3);
4628                                                 s390_stc (code, reg, 0, inst->inst_basereg, doffset);
4629                                                 break;
4630                                         case 2:
4631                                                 if (ainfo->reg == STK_BASE)
4632                                                         s390_lh  (code, reg, 0, s390_r13, ainfo->offset+2);
4633                                                 s390_sth (code, reg, 0, inst->inst_basereg, doffset);
4634                                                 break;
4635                                         case 4:
4636                                                 if (ainfo->reg == STK_BASE)
4637                                                         s390_l   (code, reg, 0, s390_r13, ainfo->offset);
4638                                                 s390_st  (code, reg, 0, inst->inst_basereg, doffset);
4639                                                 break;
4640                                         case 8:
4641                                                 if (ainfo->reg == STK_BASE)
4642                                                         s390_lm  (code, s390_r0, s390_r1, s390_r13, ainfo->offset);
4643                                                 s390_stm (code, reg, reg+1, inst->inst_basereg, doffset);
4644                                                 break;
4645                                 }
4646                         } else if (ainfo->regtype == RegTypeStructByAddr) {
4647                                 if (ainfo->reg != STK_BASE)
4648                                         s390_st  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4649                         } else
4650                                 g_assert_not_reached ();
4651                 }
4652                 pos++;
4653         }
4654
4655         if (method->save_lmf) {
4656                 /*---------------------------------------------------------------*/
4657                 /* we build the MonoLMF structure on the stack - see mini-s390.h */
4658                 /*---------------------------------------------------------------*/
4659                 lmfOffset = alloc_size - sizeof(MonoLMF);
4660
4661                 s390_lr    (code, s390_r13, cfg->frame_reg);
4662                 if (s390_is_uimm16(lmfOffset))
4663                         s390_ahi   (code, s390_r13, lmfOffset);
4664                 else {
4665                         s390_basr (code, s390_r14, 0);
4666                         s390_j    (code, 4);
4667                         s390_word (code, lmfOffset);
4668                         s390_a    (code, s390_r13, 0, s390_r14, 4);
4669                 }
4670
4671                 /*---------------------------------------------------------------*/
4672                 /* Preserve the parameter registers while we fix up the lmf      */
4673                 /*---------------------------------------------------------------*/
4674                 s390_stm   (code, s390_r2, s390_r6, s390_r13,
4675                             G_STRUCT_OFFSET(MonoLMF, pregs[0]));
4676
4677                 /*---------------------------------------------------------------*/
4678                 /* On return from this call r2 have the address of the &lmf      */
4679                 /*---------------------------------------------------------------*/
4680                 mono_add_patch_info (cfg, code - cfg->native_code,
4681                                      MONO_PATCH_INFO_INTERNAL_METHOD,
4682                                      (gpointer)"mono_get_lmf_addr");
4683                 s390_brasl (code, s390_r14, 0);
4684
4685                 /*---------------------------------------------------------------*/
4686                 /* Set lmf.lmf_addr = jit_tls->lmf                               */
4687                 /*---------------------------------------------------------------*/
4688                 s390_st    (code, s390_r2, 0, s390_r13,
4689                             G_STRUCT_OFFSET(MonoLMF, lmf_addr));
4690
4691                 /*---------------------------------------------------------------*/
4692                 /* Get current lmf                                               */
4693                 /*---------------------------------------------------------------*/
4694                 s390_l     (code, s390_r0, 0, s390_r2, 0);
4695
4696                 /*---------------------------------------------------------------*/
4697                 /* Set our lmf as the current lmf                                */
4698                 /*---------------------------------------------------------------*/
4699                 s390_st    (code, s390_r13, 0, s390_r2, 0);
4700
4701                 /*---------------------------------------------------------------*/
4702                 /* Have our lmf.previous_lmf point to the last lmf               */
4703                 /*---------------------------------------------------------------*/
4704                 s390_st    (code, s390_r0, 0, s390_r13,
4705                             G_STRUCT_OFFSET(MonoLMF, previous_lmf));
4706
4707                 /*---------------------------------------------------------------*/
4708                 /* save method info                                              */
4709                 /*---------------------------------------------------------------*/
4710                 s390_basr  (code, s390_r1, 0);
4711                 s390_j     (code, 4);
4712                 s390_word  (code, method);
4713                 s390_l     (code, s390_r1, 0, s390_r1, 4);
4714                 s390_st    (code, s390_r1, 0, s390_r13,
4715                             G_STRUCT_OFFSET(MonoLMF, method));
4716
4717                 /*---------------------------------------------------------------*/
4718                 /* save the current IP                                           */
4719                 /*---------------------------------------------------------------*/
4720                 s390_st    (code, STK_BASE, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, ebp));
4721                 s390_basr  (code, s390_r1, 0);
4722                 s390_la    (code, s390_r1, 0, s390_r1, 0);
4723                 s390_st    (code, s390_r1, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, eip));
4724
4725                 /*---------------------------------------------------------------*/
4726                 /* Save general and floating point registers                     */
4727                 /*---------------------------------------------------------------*/
4728                 s390_stm   (code, s390_r2, s390_r12, s390_r13,
4729                             G_STRUCT_OFFSET(MonoLMF, gregs[2]));
4730                 for (i = 0; i < 16; i++) {
4731                         s390_std  (code, i, 0, s390_r13,
4732                                    G_STRUCT_OFFSET(MonoLMF, fregs[i]));
4733                 }
4734
4735                 /*---------------------------------------------------------------*/
4736                 /* Restore the parameter registers now that we've set up the lmf */
4737                 /*---------------------------------------------------------------*/
4738                 s390_lm    (code, s390_r2, s390_r6, s390_r13,
4739                             G_STRUCT_OFFSET(MonoLMF, pregs[0]));
4740         }
4741
4742         if (tracing)
4743                 code = mono_arch_instrument_prolog(cfg, enter_method, code, TRUE);
4744
4745         cfg->code_len = code - cfg->native_code;
4746
4747         g_assert (cfg->code_len < cfg->code_size);
4748
4749         return code;
4750 }
4751
4752 /*========================= End of Function ========================*/
4753
4754 /*------------------------------------------------------------------*/
4755 /*                                                                  */
4756 /* Name         - mono_arch_emit_epilog                             */
4757 /*                                                                  */
4758 /* Function     - Emit the instructions for a function epilog.      */
4759 /*                                                                  */
4760 /*------------------------------------------------------------------*/
4761
4762 void
4763 mono_arch_emit_epilog (MonoCompile *cfg)
4764 {
4765         MonoMethod *method = cfg->method;
4766         int tracing = 0;
4767         guint8 *code;
4768         int max_epilog_size = 96;
4769
4770         if (cfg->method->save_lmf)
4771                 max_epilog_size += 128;
4772
4773         if (mono_jit_trace_calls != NULL)
4774                 max_epilog_size += 128;
4775
4776         if (cfg->prof_options & MONO_PROFILE_ENTER_LEAVE)
4777                 max_epilog_size += 128;
4778
4779         while ((cfg->code_len + max_epilog_size) > (cfg->code_size - 16)) {
4780                 cfg->code_size  *= 2;
4781                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
4782                 mono_jit_stats.code_reallocs++;
4783         }
4784
4785         code = cfg->native_code + cfg->code_len;
4786
4787         if (mono_jit_trace_calls != NULL && mono_trace_eval (method)) {
4788                 code = mono_arch_instrument_epilog (cfg, leave_method, code, TRUE);
4789                 tracing = 1;
4790         }
4791
4792         if (method->save_lmf)
4793                 restoreLMF(code, cfg->frame_reg, cfg->stack_usage);
4794
4795         if (cfg->flags & MONO_CFG_HAS_ALLOCA)
4796                 s390_l (code, STK_BASE, 0, STK_BASE, 0);
4797         else
4798                 code = backUpStackPtr(cfg, code, STK_BASE);
4799
4800         s390_lm  (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
4801         s390_br  (code, s390_r14);
4802
4803         cfg->code_len = code - cfg->native_code;
4804
4805         g_assert (cfg->code_len < cfg->code_size);
4806
4807 }
4808
4809 /*========================= End of Function ========================*/
4810
4811 /*------------------------------------------------------------------*/
4812 /*                                                                  */
4813 /* Name         - mono_arch_emit_exceptions                         */
4814 /*                                                                  */
4815 /* Function     - Emit the blocks to handle exception conditions.   */
4816 /*                                                                  */
4817 /*------------------------------------------------------------------*/
4818
4819 void
4820 mono_arch_emit_exceptions (MonoCompile *cfg)
4821 {
4822         MonoJumpInfo    *patch_info;
4823         guint8          *code;
4824         int             nThrows = 0,
4825                         exc_count = 0,
4826                         iExc;
4827         guint32         code_size;
4828         MonoClass       *exc_classes [MAX_EXC];
4829         guint8          *exc_throw_start [MAX_EXC];
4830
4831         for (patch_info = cfg->patch_info;
4832              patch_info;
4833              patch_info = patch_info->next) {
4834                 if (patch_info->type == MONO_PATCH_INFO_EXC)
4835                         exc_count++;
4836         }
4837
4838         code_size = exc_count * 26;
4839
4840         while ((cfg->code_len + code_size) > (cfg->code_size - 16)) {
4841                 cfg->code_size  *= 2;
4842                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
4843                 mono_jit_stats.code_reallocs++;
4844         }
4845
4846         code = cfg->native_code + cfg->code_len;
4847
4848         /*---------------------------------------------------------------------*/
4849         /* Add code to raise exceptions                                        */
4850         /*---------------------------------------------------------------------*/
4851         for (patch_info = cfg->patch_info; patch_info; patch_info = patch_info->next) {
4852                 switch (patch_info->type) {
4853                 case MONO_PATCH_INFO_EXC: {
4854                         guint8 *ip = patch_info->ip.i + cfg->native_code;
4855                         MonoClass *exc_class;
4856                         guint32 throw_ip;
4857
4858                         /*-----------------------------------------------------*/
4859                         /* Patch the branch in epilog to come here             */
4860                         /*-----------------------------------------------------*/
4861                         s390_patch (ip + 2, (guint32) (S390_RELATIVE(code,ip)));
4862
4863                         exc_class = mono_class_from_name (mono_defaults.corlib,
4864                                                           "System",
4865                                                           patch_info->data.name);
4866                         g_assert (exc_class);
4867                         throw_ip = patch_info->ip.i;
4868
4869                         for (iExc = 0; iExc < nThrows; ++iExc)
4870                                 if (exc_classes [iExc] == exc_class)
4871                                         break;
4872
4873                         if (iExc < nThrows) {
4874                                 s390_jcl (code, S390_CC_UN, (guint32) exc_throw_start [iExc]);
4875                                 patch_info->type = MONO_PATCH_INFO_NONE;
4876                         } else {
4877
4878                                 if (nThrows < MAX_EXC) {
4879                                         exc_classes [nThrows]     = exc_class;
4880                                         exc_throw_start [nThrows] = code;
4881                                 }
4882
4883                                 /*---------------------------------------------*/
4884                                 /* Patch the parameter passed to the handler   */
4885                                 /*---------------------------------------------*/
4886                                 s390_basr (code, s390_r13, 0);
4887                                 s390_j    (code, 4);
4888                                 s390_word (code, patch_info->data.target);
4889                                 /*---------------------------------------------*/
4890                                 /* Load return address & parameter register    */
4891                                 /*---------------------------------------------*/
4892                                 s390_larl (code, s390_r14, (gsize)S390_RELATIVE((patch_info->ip.i +
4893                                                            cfg->native_code + 8), code));
4894                                 s390_l    (code, s390_r2, 0, s390_r13, 4);
4895                                 /*---------------------------------------------*/
4896                                 /* Reuse the current patch to set the jump     */
4897                                 /*---------------------------------------------*/
4898                                 patch_info->type      = MONO_PATCH_INFO_INTERNAL_METHOD;
4899                                 patch_info->data.name = "mono_arch_throw_exception_by_name";
4900                                 patch_info->ip.i      = code - cfg->native_code;
4901                                 s390_jcl  (code, S390_CC_UN, 0);
4902                         }
4903                         break;
4904                 }
4905                 default:
4906                         /* do nothing */
4907                         break;
4908                 }
4909         }
4910
4911         cfg->code_len = code - cfg->native_code;
4912
4913         g_assert (cfg->code_len < cfg->code_size);
4914
4915 }
4916
4917 /*========================= End of Function ========================*/
4918
4919 /*------------------------------------------------------------------*/
4920 /*                                                                  */
4921 /* Name         - mono_arch_setup_jit_tls_data                      */
4922 /*                                                                  */
4923 /* Function     - Setup the JIT's Thread Level Specific Data.       */
4924 /*                                                                  */
4925 /*------------------------------------------------------------------*/
4926
4927 void
4928 mono_arch_setup_jit_tls_data (MonoJitTlsData *tls)
4929 {
4930
4931         if (!tls_offset_inited) {
4932                 tls_offset_inited = TRUE;
4933
4934 #if HAVE_KW_THREAD
4935 # if 0
4936         __asm__ ("\tear\t%r1,0\n"
4937                  "\tlr\t%0,%3\n"
4938                  "\tsr\t%0,%r1\n"
4939                  "\tlr\t%1,%4\n"
4940                  "\tsr\t%1,%r1\n"
4941                  "\tlr\t%2,%5\n"
4942                  "\tsr\t%2,%r1\n"
4943                  : "=r" (appdomain_tls_offset),
4944                    "=r" (thread_tls_offset),
4945                    "=r" (lmf_tls_offset)
4946                  : "r" (&tls_appdomain),
4947                    "r" (&tls_current_object),
4948                    "r" (&mono_lmf_addr)
4949                  : "1", "cc");
4950 # endif
4951 #endif
4952         }
4953
4954         if (!lmf_addr_key_inited) {
4955                 lmf_addr_key_inited = TRUE;
4956                 pthread_key_create (&lmf_addr_key, NULL);
4957         }
4958         pthread_setspecific (lmf_addr_key, &tls->lmf);
4959
4960 }
4961
4962 /*========================= End of Function ========================*/
4963
4964 /*------------------------------------------------------------------*/
4965 /*                                                                  */
4966 /* Name         - mono_arch_free_jit_tls_data                       */
4967 /*                                                                  */
4968 /* Function     - Free tls data.                                    */
4969 /*                                                                  */
4970 /*------------------------------------------------------------------*/
4971
4972 void
4973 mono_arch_free_jit_tls_data (MonoJitTlsData *tls)
4974 {
4975 }
4976
4977 /*========================= End of Function ========================*/
4978
4979 /*------------------------------------------------------------------*/
4980 /*                                                                  */
4981 /* Name         - mono_arch_emit_inst_for_method                        */
4982 /*                                                                  */
4983 /*------------------------------------------------------------------*/
4984
4985 MonoInst*
4986 mono_arch_emit_inst_for_method (MonoCompile *cfg, MonoMethod *cmethod, MonoMethodSignature *fsig, MonoInst **args)
4987 {
4988         return NULL;
4989 }
4990
4991 /*========================= End of Function ========================*/
4992
4993 void
4994 mono_arch_decompose_opts (MonoCompile *cfg, MonoInst *ins)
4995 {
4996         switch (ins->opcode) {
4997         case OP_ISUB_OVF:
4998                 ins->opcode = OP_S390_ISUB_OVF;
4999                 break;
5000         case OP_ISUB_OVF_UN:
5001                 ins->opcode = OP_S390_ISUB_OVF_UN;
5002                 break;
5003         case OP_IADD_OVF:
5004                 ins->opcode = OP_S390_IADD_OVF;
5005                 break;
5006         case OP_IADD_OVF_UN:
5007                 ins->opcode = OP_S390_IADD_OVF_UN;
5008                 break;
5009         default:
5010                 break;
5011         }
5012 }
5013
5014 /*========================= End of Function ========================*/
5015
5016 /*------------------------------------------------------------------*/
5017 /*                                                                  */
5018 /* Name         - mono_arch_decompose_long_opts                         */
5019 /*                                                                  */
5020 /*------------------------------------------------------------------*/
5021
5022 void
5023 mono_arch_decompose_long_opts (MonoCompile *cfg, MonoInst *ins)
5024 {
5025         // The generic code seems to work for OP_LSUB fine on s390, why is a different
5026         // implementation needed ? gcc also seems to use the different implementation.
5027         // FIXME: What about the other OP_L opcodes below ?
5028
5029         switch (ins->opcode) {
5030         case OP_LADD_OVF:
5031         case OP_LADD_OVF_UN:
5032         case OP_LSUB_OVF:
5033         case OP_LSUB_OVF_UN: {
5034                 int opcode = 0;
5035
5036                 switch (ins->opcode) {
5037                 case OP_LADD:
5038                         opcode = OP_S390_LADD;
5039                         break;
5040                 case OP_LADD_OVF:
5041                         opcode = OP_S390_LADD_OVF;
5042                         break;
5043                 case OP_LADD_OVF_UN:
5044                         opcode = OP_S390_LADD_OVF_UN;
5045                         break;
5046                 case OP_LSUB:
5047                         opcode = OP_S390_LSUB;
5048                         break;
5049                 case OP_LSUB_OVF:
5050                         opcode = OP_S390_LSUB_OVF;
5051                         break;
5052                 case OP_LSUB_OVF_UN:
5053                         opcode = OP_S390_LSUB_OVF_UN;
5054                         break;
5055                 default:
5056                         g_assert_not_reached ();
5057                 }
5058
5059                 /* These hard regs make ssa crazy */
5060                 cfg->disable_ssa = TRUE;
5061                 MONO_EMIT_NEW_UNALU (cfg, OP_MOVE, s390_r0, ins->sreg1 + 1);
5062                 MONO_EMIT_NEW_UNALU (cfg, OP_MOVE, s390_r1, ins->sreg1 + 2);
5063                 MONO_EMIT_NEW_BIALU (cfg, opcode, ins->dreg, ins->sreg2 + 1, ins->sreg2 + 2);
5064                 NULLIFY_INS (ins);
5065                 break;
5066         }
5067         case OP_LADD_IMM: {
5068                 int dreg = mono_alloc_dreg (cfg, STACK_I8);
5069                 MONO_EMIT_NEW_I8CONST (cfg, dreg, ins->inst_l);
5070                 MONO_EMIT_NEW_BIALU (cfg, OP_LADD, ins->dreg, ins->sreg1, dreg);
5071                 NULLIFY_INS (ins);
5072                 break;
5073         }
5074         case OP_LSUB_IMM: {
5075                 int dreg = mono_alloc_dreg (cfg, STACK_I8);
5076                 MONO_EMIT_NEW_I8CONST (cfg, dreg, ins->inst_l);
5077                 MONO_EMIT_NEW_BIALU (cfg, OP_LSUB, ins->dreg, ins->sreg1, dreg);
5078                 NULLIFY_INS (ins);
5079                 break;
5080         }
5081         case OP_LNEG: {
5082                 MONO_EMIT_NEW_BIALU (cfg, OP_S390_LNEG, ins->dreg, ins->sreg1 + 1, ins->sreg1 + 2);
5083                 NULLIFY_INS (ins);
5084                 break;
5085         }
5086         case OP_ISUB_OVF:
5087                 ins->opcode = OP_S390_ISUB_OVF;
5088                 break;
5089         case OP_ISUB_OVF_UN:
5090                 ins->opcode = OP_S390_ISUB_OVF_UN;
5091                 break;
5092         default:
5093                 break;
5094         }
5095 }
5096
5097 /*========================= End of Function ========================*/
5098
5099 /*------------------------------------------------------------------*/
5100 /*                                                                  */
5101 /* Name         - mono_arch_print_tree                              */
5102 /*                                                                  */
5103 /* Function     - Print platform-specific opcode details.           */
5104 /*                                                                  */
5105 /* Returns      - 1 - opcode details have been printed              */
5106 /*                0 - opcode details have not been printed          */
5107 /*                                                                  */
5108 /*------------------------------------------------------------------*/
5109
5110 gboolean
5111 mono_arch_print_tree (MonoInst *tree, int arity)
5112 {
5113         gboolean done;
5114
5115         switch (tree->opcode) {
5116                 case OP_S390_LOADARG:
5117                 case OP_S390_ARGREG:
5118                 case OP_S390_ARGPTR:
5119                         printf ("[0x%lx(%s)]", tree->inst_offset,
5120                                 mono_arch_regname (tree->inst_basereg));
5121                         done = 1;
5122                         break;
5123                 case OP_S390_STKARG:
5124                         printf ("[0x%lx(previous_frame)]",
5125                                 tree->inst_offset);
5126                         done = 1;
5127                         break;
5128                 case OP_S390_MOVE:
5129                         printf ("[0x%lx(%d,%s),0x%lx(%s)]",
5130                                 tree->inst_offset, tree->backend.size,
5131                                 mono_arch_regname(tree->dreg), tree->inst_imm,
5132                                 mono_arch_regname(tree->sreg1));
5133                         done = 1;
5134                         break;
5135                 case OP_S390_SETF4RET:
5136                         printf ("[%s,%s]",
5137                                 mono_arch_fregname (tree->dreg),
5138                                 mono_arch_fregname (tree->sreg1));
5139                         done = 1;
5140                         break;
5141                 case OP_TLS_GET:
5142                         printf ("[0x%lx(0x%lx,%s)]", tree->inst_offset,
5143                                 tree->inst_imm,
5144                                 mono_arch_regname (tree->sreg1));
5145                         done = 1;
5146                         break;
5147                 case OP_S390_BKCHAIN:
5148                         printf ("[previous_frame(%s)]",
5149                                 mono_arch_regname (tree->sreg1));
5150                         done = 1;
5151                         break;
5152                 default:
5153                         done = 0;
5154         }
5155         return (done);
5156 }
5157
5158 /*========================= End of Function ========================*/
5159
5160 /*------------------------------------------------------------------*/
5161 /*                                                                  */
5162 /* Name         - mono_arch_regalloc_cost                           */
5163 /*                                                                  */
5164 /* Function     - Determine the cost, in the number of memory       */
5165 /*                references, of the action of allocating the var-  */
5166 /*                iable VMV into a register during global register  */
5167 /*                allocation.                                       */
5168 /*                                                                  */
5169 /* Returns      - Cost                                              */
5170 /*                                                                  */
5171 /*------------------------------------------------------------------*/
5172
5173 guint32
5174 mono_arch_regalloc_cost (MonoCompile *cfg, MonoMethodVar *vmv)
5175 {
5176         /* FIXME: */
5177         return 2;
5178 }
5179
5180 /*========================= End of Function ========================*/
5181
5182 /*------------------------------------------------------------------*/
5183 /*                                                                  */
5184 /* Name         - mono_arch_get_domain_intrinsic                    */
5185 /*                                                                  */
5186 /* Function     -                                                   */
5187 /*                                                                  */
5188 /* Returns      -                                                   */
5189 /*                                                                  */
5190 /*------------------------------------------------------------------*/
5191
5192 MonoInst *
5193 mono_arch_get_domain_intrinsic (MonoCompile* cfg)
5194 {
5195         MonoInst *ins;
5196
5197         if (appdomain_tls_offset == -1)
5198                 return NULL;
5199
5200         MONO_INST_NEW (cfg, ins, OP_TLS_GET);
5201         ins->inst_offset = appdomain_tls_offset;
5202         return (ins);
5203 }
5204
5205 /*========================= End of Function ========================*/
5206
5207 /*------------------------------------------------------------------*/
5208 /*                                                                  */
5209 /* Name         - mono_arch_get_thread_intrinsic                    */
5210 /*                                                                  */
5211 /* Function     -                                                   */
5212 /*                                                                  */
5213 /* Returns      -                                                   */
5214 /*                                                                  */
5215 /*------------------------------------------------------------------*/
5216
5217 MonoInst *
5218 mono_arch_get_thread_intrinsic (MonoCompile* cfg)
5219 {
5220         MonoInst *ins;
5221
5222         if (thread_tls_offset == -1)
5223                 return NULL;
5224
5225         MONO_INST_NEW (cfg, ins, OP_TLS_GET);
5226         ins->inst_offset = thread_tls_offset;
5227         return (ins);
5228 }
5229
5230 /*========================= End of Function ========================*/
5231
5232 /*------------------------------------------------------------------*/
5233 /*                                                                  */
5234 /* Name         - mono_arch_flush_register_windows                  */
5235 /*                                                                  */
5236 /* Function     -                                                   */
5237 /*                                                                  */
5238 /* Returns      -                                                   */
5239 /*                                                                  */
5240 /*------------------------------------------------------------------*/
5241
5242 void
5243 mono_arch_flush_register_windows (void)
5244 {
5245 }
5246
5247 /*========================= End of Function ========================*/
5248
5249 /*------------------------------------------------------------------*/
5250 /*                                                                  */
5251 /* Name         - mono_arch_get_lmf_addr                            */
5252 /*                                                                  */
5253 /* Function     -                                                   */
5254 /*                                                                  */
5255 /* Returns      -                                                   */
5256 /*                                                                  */
5257 /*------------------------------------------------------------------*/
5258
5259 gpointer
5260 mono_arch_get_lmf_addr (void)
5261 {
5262         return pthread_getspecific (lmf_addr_key);
5263 }
5264
5265
5266 /*========================= End of Function ========================*/
5267
5268 /*------------------------------------------------------------------*/
5269 /*                                                                  */
5270 /* Name         - mono_arch_get_patch_offset                        */
5271 /*                                                                  */
5272 /* Function     - Dummy entry point until s390x supports aot.       */
5273 /*                                                                  */
5274 /* Returns      - Offset for patch.                                 */
5275 /*                                                                  */
5276 /*------------------------------------------------------------------*/
5277
5278 guint32
5279 mono_arch_get_patch_offset (guint8 *code)
5280 {
5281         return 0;
5282 }
5283
5284 /*========================= End of Function ========================*/
5285
5286 gpointer
5287 mono_arch_context_get_int_reg (MonoContext *ctx, int reg)
5288 {
5289         /* FIXME: implement */
5290         g_assert_not_reached ();
5291         return NULL;
5292 }