mono/mini/mini-s390x.c

   1 /*------------------------------------------------------------------*/
   2 /*                                                                  */
   3 /* Name        - mini-s390.c                                        */
   4 /*                                                                  */
   5 /* Function    - S/390 backend for the Mono code generator.         */
   6 /*                                                                  */
   7 /* Name        - Neale Ferguson (Neale.Ferguson@SoftwareAG-usa.com) */
   8 /*                                                                  */
   9 /* Date        - January, 2004                                      */
  10 /*                                                                  */
  11 /* Derivation  - From mini-x86 & mini-ppc by -                      */
  12 /*               Paolo Molaro (lupus@ximian.com)                    */
  13 /*               Dietmar Maurer (dietmar@ximian.com)                */
  14 /*                                                                  */
  15 /*------------------------------------------------------------------*/
  16
  17 /*------------------------------------------------------------------*/
  18 /*                 D e f i n e s                                    */
  19 /*------------------------------------------------------------------*/
  20
  21 #define MAX_ARCH_DELEGATE_PARAMS 7
  22
  23 #define EMIT_COND_BRANCH(ins,cond)                                              \
  24 {                                                                               \
  25 if (ins->inst_true_bb->native_offset) {                                         \
  26         int displace;                                                           \
  27         displace = ((cfg->native_code +                                         \
  28                     ins->inst_true_bb->native_offset) - code) / 2;              \
  29         if (s390_is_imm16(displace)) {                                          \
  30                 s390_brc (code, cond, displace);                                \
  31         } else {                                                                \
  32                 s390_jcl (code, cond, displace);                                \
  33         }                                                                       \
  34 } else {                                                                        \
  35         mono_add_patch_info (cfg, code - cfg->native_code,                      \
  36                              MONO_PATCH_INFO_BB, ins->inst_true_bb);            \
  37         s390_jcl (code, cond, 0);                                               \
  38 }                                                                               \
  39 }
  40
  41 #define EMIT_UNCOND_BRANCH(ins)                                                 \
  42 {                                                                               \
  43 if (ins->inst_target_bb->native_offset) {                                       \
  44         int displace;                                                           \
  45         displace = ((cfg->native_code +                                         \
  46                     ins->inst_target_bb->native_offset) - code) / 2;            \
  47         if (s390_is_imm16(displace)) {                                          \
  48                 s390_brc (code, S390_CC_UN, displace);                          \
  49         } else {                                                                \
  50                 s390_jcl (code, S390_CC_UN, displace);                          \
  51         }                                                                       \
  52 } else {                                                                        \
  53         mono_add_patch_info (cfg, code - cfg->native_code,                      \
  54                              MONO_PATCH_INFO_BB, ins->inst_target_bb);          \
  55         s390_jcl (code, S390_CC_UN, 0);                                         \
  56 }                                                                               \
  57 }
  58
  59 #define EMIT_COND_SYSTEM_EXCEPTION(cond,exc_name)                       \
  60         do {                                                            \
  61                 mono_add_patch_info (cfg, code - cfg->native_code,      \
  62                                      MONO_PATCH_INFO_EXC, exc_name);    \
  63                 s390_jcl (code, cond, 0);                               \
  64         } while (0);
  65
  66 #define CHECK_SRCDST_COM                                                \
  67         if (ins->dreg == ins->sreg2) {                                  \
  68                 src2 = ins->sreg1;                                      \
  69         } else {                                                        \
  70                 src2 = ins->sreg2;                                      \
  71                 if (ins->dreg != ins->sreg1) {                          \
  72                         s390_lgr (code, ins->dreg, ins->sreg1);         \
  73                 }                                                       \
  74         }
  75
  76 #define CHECK_SRCDST_NCOM                                               \
  77         if (ins->dreg == ins->sreg2) {                                  \
  78                 src2 = s390_r13;                                        \
  79                 s390_lgr (code, s390_r13, ins->sreg2);                  \
  80         } else {                                                        \
  81                 src2 = ins->sreg2;                                      \
  82         }                                                               \
  83         if (ins->dreg != ins->sreg1) {                                  \
  84                 s390_lgr (code, ins->dreg, ins->sreg1);                 \
  85         }
  86
  87 #define CHECK_SRCDST_COM_I                                              \
  88         if (ins->dreg == ins->sreg2) {                                  \
  89                 src2 = ins->sreg1;                                      \
  90         } else {                                                        \
  91                 src2 = ins->sreg2;                                      \
  92                 if (ins->dreg != ins->sreg1) {                          \
  93                         s390_lgfr (code, ins->dreg, ins->sreg1);        \
  94                 }                                                       \
  95         }
  96
  97 #define CHECK_SRCDST_NCOM_I                                             \
  98         if (ins->dreg == ins->sreg2) {                                  \
  99                 src2 = s390_r13;                                        \
 100                 s390_lgfr (code, s390_r13, ins->sreg2);                 \
 101         } else {                                                        \
 102                 src2 = ins->sreg2;                                      \
 103         }                                                               \
 104         if (ins->dreg != ins->sreg1) {                                  \
 105                 s390_lgfr (code, ins->dreg, ins->sreg1);                \
 106         }
 107
 108 #define CHECK_SRCDST_COM_F                                              \
 109         if (ins->dreg == ins->sreg2) {                                  \
 110                 src2 = ins->sreg1;                                      \
 111         } else {                                                        \
 112                 src2 = ins->sreg2;                                      \
 113                 if (ins->dreg != ins->sreg1) {                          \
 114                         s390_ldr (code, ins->dreg, ins->sreg1);         \
 115                 }                                                       \
 116         }
 117
 118 #define CHECK_SRCDST_NCOM_F                                             \
 119         if (ins->dreg == ins->sreg2) {                                  \
 120                 src2 = s390_f15;                                        \
 121                 s390_ldr (code, s390_r13, ins->sreg2);                  \
 122         } else {                                                        \
 123                 src2 = ins->sreg2;                                      \
 124         }                                                               \
 125         if (ins->dreg != ins->sreg1) {                                  \
 126                 s390_ldr (code, ins->dreg, ins->sreg1);                 \
 127         }
 128
 129 #define MONO_EMIT_NEW_MOVE(cfg,dest,offset,src,imm,size) do {                   \
 130                 MonoInst *inst;                                                 \
 131                 int sReg, dReg;                                                 \
 132                 MONO_INST_NEW (cfg, inst, OP_NOP);                              \
 133                 if (size > 256) {                                               \
 134                         inst->dreg        = dest;                               \
 135                         inst->inst_offset = offset;                             \
 136                         inst->sreg1       = src;                                \
 137                         inst->inst_imm    = imm;                                \
 138                 } else {                                                        \
 139                         if (s390_is_uimm12(offset)) {                           \
 140                                 inst->dreg        = dest;                       \
 141                                 inst->inst_offset = offset;                     \
 142                         } else {                                                \
 143                                 dReg = mono_alloc_preg (cfg);                   \
 144                                 MONO_EMIT_NEW_BIALU_IMM(cfg, OP_ADD_IMM,        \
 145                                         dReg, dest, offset);                    \
 146                                 inst->dreg        = dReg;                       \
 147                                 inst->inst_offset = 0;                          \
 148                         }                                                       \
 149                         if (s390_is_uimm12(imm)) {                              \
 150                                 inst->sreg1       = src;                        \
 151                                 inst->inst_imm    = imm;                        \
 152                         } else {                                                \
 153                                 sReg = mono_alloc_preg (cfg);                   \
 154                                 MONO_EMIT_NEW_BIALU_IMM(cfg, OP_ADD_IMM,        \
 155                                         sReg, src, imm);                        \
 156                                 inst->sreg1       = sReg;                       \
 157                                 inst->inst_imm    = 0;                          \
 158                         }                                                       \
 159                 }                                                               \
 160                 inst->opcode            = OP_S390_MOVE;                         \
 161                 inst->backend.size      = size;                                 \
 162         MONO_ADD_INS (cfg->cbb, inst);                                          \
 163         } while (0)
 164
 165 #define MONO_OUTPUT_VTR(cfg, size, dr, sr, so) do {                             \
 166         int reg = mono_alloc_preg (cfg); \
 167         switch (size) {                                                         \
 168                 case 0:                                                         \
 169                         MONO_EMIT_NEW_ICONST(cfg, reg, 0);                      \
 170                 break;                                                          \
 171                 case 1:                                                         \
 172                         MONO_EMIT_NEW_LOAD_MEMBASE_OP(cfg, OP_LOADU1_MEMBASE,   \
 173                                 reg, sr, so);                                   \
 174                 break;                                                          \
 175                 case 2:                                                         \
 176                         MONO_EMIT_NEW_LOAD_MEMBASE_OP(cfg, OP_LOADU2_MEMBASE,   \
 177                                 reg, sr, so);                                   \
 178                 break;                                                          \
 179                 case 4:                                                         \
 180                         MONO_EMIT_NEW_LOAD_MEMBASE_OP(cfg, OP_LOADI4_MEMBASE,   \
 181                                 reg, sr, so);                                   \
 182                 break;                                                          \
 183                 case 8:                                                         \
 184                         MONO_EMIT_NEW_LOAD_MEMBASE_OP(cfg, OP_LOADI8_MEMBASE,   \
 185                                 reg, sr, so);                                   \
 186                 break;                                                          \
 187         }                                                                       \
 188         mono_call_inst_add_outarg_reg(cfg, call, reg, dr, FALSE);               \
 189 } while (0)
 190
 191 #define MONO_OUTPUT_VTS(cfg, size, dr, dx, sr, so) do {                         \
 192         int tmpr;                                                               \
 193         switch (size) {                                                         \
 194                 case 0:                                                         \
 195                         tmpr = mono_alloc_preg (cfg); \
 196                         MONO_EMIT_NEW_ICONST(cfg, tmpr, 0);                     \
 197                         MONO_EMIT_NEW_STORE_MEMBASE(cfg, OP_STORE_MEMBASE_REG,  \
 198                                 dr, dx, tmpr);                                  \
 199                 break;                                                          \
 200                 case 1:                                                         \
 201                         tmpr = mono_alloc_preg (cfg); \
 202                         MONO_EMIT_NEW_LOAD_MEMBASE_OP(cfg, OP_LOADU1_MEMBASE,   \
 203                                 tmpr, sr, so);                                  \
 204                         MONO_EMIT_NEW_STORE_MEMBASE(cfg, OP_STORE_MEMBASE_REG,  \
 205                                 dr, dx, tmpr);                                  \
 206                 break;                                                          \
 207                 case 2:                                                         \
 208                         tmpr = mono_alloc_preg (cfg);                           \
 209                         MONO_EMIT_NEW_LOAD_MEMBASE_OP(cfg, OP_LOADU2_MEMBASE,   \
 210                                 tmpr, sr, so);                                  \
 211                         MONO_EMIT_NEW_STORE_MEMBASE(cfg, OP_STORE_MEMBASE_REG,  \
 212                                 dr, dx, tmpr);                                  \
 213                 break;                                                          \
 214                 case 4:                                                         \
 215                         tmpr = mono_alloc_preg (cfg);                           \
 216                         MONO_EMIT_NEW_LOAD_MEMBASE_OP(cfg, OP_LOADI4_MEMBASE,   \
 217                                 tmpr, sr, so);                                  \
 218                         MONO_EMIT_NEW_STORE_MEMBASE(cfg, OP_STORE_MEMBASE_REG,  \
 219                                 dr, dx, tmpr);                                  \
 220                 break;                                                          \
 221                 case 8:                                                         \
 222                         MONO_EMIT_NEW_MOVE (cfg, dr, dx, sr, so, size);         \
 223                 break;                                                          \
 224         }                                                                       \
 225 } while (0)
 226
 227 #undef DEBUG
 228 #define DEBUG(a) if (cfg->verbose_level > 1) a
 229
 230 #define MAX_EXC 16
 231
 232 #define S390_TRACE_STACK_SIZE (5*sizeof(gpointer)+4*sizeof(gdouble))
 233
 234 #define BREAKPOINT_SIZE         sizeof(breakpoint_t)
 235 #define S390X_NOP_SIZE          sizeof(RR_Format)
 236
 237 #define MAX(a, b) ((a) > (b) ? (a) : (b))
 238
 239 /*
 240  * imt thunking size values
 241  */
 242 #define CMP_SIZE        24
 243 #define LOADCON_SIZE    20
 244 #define LOAD_SIZE       6
 245 #define BR_SIZE         2
 246 #define JUMP_SIZE       6
 247 #define ENABLE_WRONG_METHOD_CHECK 0
 248
 249 #define mono_mini_arch_lock() mono_mutex_lock (&mini_arch_mutex)
 250 #define mono_mini_arch_unlock() mono_mutex_unlock (&mini_arch_mutex)
 251
 252 /*========================= End of Defines =========================*/
 253
 254 /*------------------------------------------------------------------*/
 255 /*                 I n c l u d e s                                  */
 256 /*------------------------------------------------------------------*/
 257
 258 #include "mini.h"
 259 #include <string.h>
 260 #include <sys/types.h>
 261 #include <unistd.h>
 262
 263 #include <mono/metadata/abi-details.h>
 264 #include <mono/metadata/appdomain.h>
 265 #include <mono/metadata/debug-helpers.h>
 266 #include <mono/metadata/profiler-private.h>
 267 #include <mono/utils/mono-math.h>
 268 #include <mono/utils/mono-mmap.h>
 269 #include <mono/utils/mono-hwcap-s390x.h>
 270
 271 #include "mini-s390x.h"
 272 #include "cpu-s390x.h"
 273 #include "support-s390x.h"
 274 #include "jit-icalls.h"
 275 #include "ir-emit.h"
 276 #include "trace.h"
 277
 278 /*========================= End of Includes ========================*/
 279
 280 /*------------------------------------------------------------------*/
 281 /*                 T y p e d e f s                                  */
 282 /*------------------------------------------------------------------*/
 283
 284 typedef struct {
 285         guint stack_size,
 286               local_size,
 287               code_size,
 288               parm_size,
 289               offset,
 290               offStruct,
 291               retStruct;
 292 } size_data;
 293
 294 /*------------------------------------------------------------------*/
 295 /* Used by the instrument_emit_epilog                               */
 296 /*------------------------------------------------------------------*/
 297
 298 enum {
 299         SAVE_NONE,
 300         SAVE_STRUCT,
 301         SAVE_ONE,
 302         SAVE_TWO,
 303         SAVE_R4,
 304         SAVE_R8
 305 };
 306
 307 typedef struct InstList InstList;
 308
 309 struct InstList {
 310         InstList *prev;
 311         InstList *next;
 312         MonoInst *data;
 313 };
 314
 315 typedef enum {
 316         RegTypeGeneral,
 317         RegTypeBase,
 318         RegTypeFP,
 319         RegTypeFPR4,
 320         RegTypeStructByVal,
 321         RegTypeStructByValInFP,
 322         RegTypeStructByAddr,
 323         RegTypeStructByAddrOnStack
 324 } ArgStorage;
 325
 326 typedef struct {
 327         gint32  offset;         /* offset from caller's stack */
 328         gint32  offparm;        /* offset from callee's stack */
 329         guint16 vtsize;         /* in param area */
 330         guint8  reg;
 331         ArgStorage regtype;
 332         guint32 size;           /* Size of structure used by RegTypeStructByVal */
 333         gint32  type;           /* Data type of argument */
 334 } ArgInfo;
 335
 336 typedef struct {
 337         int nargs;
 338         int lastgr;
 339         guint32 stack_usage;
 340         guint32 struct_ret;
 341         ArgInfo ret;
 342         ArgInfo sigCookie;
 343         size_data sz;
 344         int vret_arg_index;
 345         ArgInfo args [1];
 346 } CallInfo;
 347
 348 typedef struct {
 349         gint64  gr[5];          /* R2-R6                            */
 350         gdouble fp[3];          /* F0-F2                            */
 351 } __attribute__ ((packed)) RegParm;
 352
 353 typedef struct {
 354         RR_Format  basr;
 355         RI_Format  j;
 356         void       *pTrigger;
 357         RXY_Format lg;
 358         RXY_Format trigger;
 359 } __attribute__ ((packed)) breakpoint_t;
 360
 361 /*========================= End of Typedefs ========================*/
 362
 363 /*------------------------------------------------------------------*/
 364 /*                   P r o t o t y p e s                            */
 365 /*------------------------------------------------------------------*/
 366
 367 static void indent (int);
 368 static guint8 * backUpStackPtr(MonoCompile *, guint8 *);
 369 static void decodeParm (MonoType *, void *, int);
 370 static void enter_method (MonoMethod *, RegParm *, char *);
 371 static void leave_method (MonoMethod *, ...);
 372 static inline void add_general (guint *, size_data *, ArgInfo *);
 373 static inline void add_stackParm (guint *, size_data *, ArgInfo *, gint);
 374 static inline void add_float (guint *, size_data *, ArgInfo *);
 375 static CallInfo * get_call_info (MonoCompile *, MonoMemPool *, MonoMethodSignature *);
 376 static guchar * emit_float_to_int (MonoCompile *, guchar *, int, int, int, gboolean);
 377 static guint8 * emit_load_volatile_arguments (guint8 *, MonoCompile *);
 378 static __inline__ void emit_unwind_regs(MonoCompile *, guint8 *, int, int, long);
 379
 380 /*========================= End of Prototypes ======================*/
 381
 382 /*------------------------------------------------------------------*/
 383 /*                 G l o b a l   V a r i a b l e s                  */
 384 /*------------------------------------------------------------------*/
 385
 386 int mono_exc_esp_offset = 0;
 387
 388 __thread int indent_level = 0;
 389
 390 static gint appdomain_tls_offset = -1,
 391             lmf_tls_offset = -1,
 392             lmf_addr_tls_offset = -1;
 393
 394 pthread_key_t lmf_addr_key;
 395
 396 gboolean lmf_addr_key_inited = FALSE;
 397
 398 facilityList_t facs;
 399
 400 /*
 401  * The code generated for sequence points reads from this location,
 402  * which is made read-only when single stepping is enabled.
 403  */
 404 static gpointer ss_trigger_page;
 405
 406 /*
 407  * Enabled breakpoints read from this trigger page
 408  */
 409 static gpointer bp_trigger_page;
 410
 411 breakpoint_t breakpointCode;
 412
 413 static mono_mutex_t mini_arch_mutex;
 414
 415 /*====================== End of Global Variables ===================*/
 416
 417 /*------------------------------------------------------------------*/
 418 /*                                                                  */
 419 /* Name         - mono_arch_regname                                 */
 420 /*                                                                  */
 421 /* Function     - Returns the name of the register specified by     */
 422 /*                the input parameter.                              */
 423 /*                                                                  */
 424 /*------------------------------------------------------------------*/
 425
 426 const char*
 427 mono_arch_regname (int reg) {
 428         static const char * rnames[] = {
 429                 "s390_r0", "s390_sp", "s390_r2", "s390_r3", "s390_r4",
 430                 "s390_r5", "s390_r6", "s390_r7", "s390_r8", "s390_r9",
 431                 "s390_r10", "s390_r11", "s390_r12", "s390_r13", "s390_r14",
 432                 "s390_r15"
 433         };
 434
 435         if (reg >= 0 && reg < 16)
 436                 return rnames [reg];
 437         else
 438                 return "unknown";
 439 }
 440
 441 /*========================= End of Function ========================*/
 442
 443 /*------------------------------------------------------------------*/
 444 /*                                                                  */
 445 /* Name         - mono_arch_fregname                                */
 446 /*                                                                  */
 447 /* Function     - Returns the name of the register specified by     */
 448 /*                the input parameter.                              */
 449 /*                                                                  */
 450 /*------------------------------------------------------------------*/
 451
 452 const char*
 453 mono_arch_fregname (int reg) {
 454         static const char * rnames[] = {
 455                 "s390_f0", "s390_f1", "s390_f2", "s390_f3", "s390_f4",
 456                 "s390_f5", "s390_f6", "s390_f7", "s390_f8", "s390_f9",
 457                 "s390_f10", "s390_f11", "s390_f12", "s390_f13", "s390_f14",
 458                 "s390_f15"
 459         };
 460
 461         if (reg >= 0 && reg < 16)
 462                 return rnames [reg];
 463         else
 464                 return "unknown";
 465 }
 466
 467 /*========================= End of Function ========================*/
 468
 469 /*------------------------------------------------------------------*/
 470 /*                                                                  */
 471 /* Name         - arch_get_argument_info                            */
 472 /*                                                                  */
 473 /* Function     - Gathers information on parameters such as size,   */
 474 /*                alignment, and padding. arg_info should be large  */
 475 /*                enough to hold param_count + 1 entries.           */
 476 /*                                                                  */
 477 /* Parameters   - @csig - Method signature                          */
 478 /*                @param_count - No. of parameters to consider      */
 479 /*                @arg_info - An array to store the result info     */
 480 /*                                                                  */
 481 /* Returns      - Size of the activation frame                      */
 482 /*                                                                  */
 483 /*------------------------------------------------------------------*/
 484
 485 int
 486 mono_arch_get_argument_info (MonoGenericSharingContext *gsctx, MonoMethodSignature *csig,
 487                              int param_count,
 488                              MonoJitArgumentInfo *arg_info)
 489 {
 490         int k, frame_size = 0;
 491         int size, align, pad;
 492         int offset = 8;
 493
 494         if (MONO_TYPE_ISSTRUCT (csig->ret)) {
 495                 frame_size += sizeof (gpointer);
 496                 offset += 8;
 497         }
 498
 499         arg_info [0].offset = offset;
 500
 501         if (csig->hasthis) {
 502                 frame_size += sizeof (gpointer);
 503                 offset += 8;
 504         }
 505
 506         arg_info [0].size = frame_size;
 507
 508         for (k = 0; k < param_count; k++) {
 509
 510                 if (csig->pinvoke)
 511                         size = mono_type_native_stack_size (csig->params [k], (guint32 *) &align);
 512                 else
 513                         size = mini_type_stack_size (NULL, csig->params [k], &align);
 514
 515                 frame_size += pad = (align - (frame_size & (align - 1))) & (align - 1);
 516                 arg_info [k].pad = pad;
 517                 frame_size += size;
 518                 arg_info [k + 1].pad = 0;
 519                 arg_info [k + 1].size = size;
 520                 offset += pad;
 521                 arg_info [k + 1].offset = offset;
 522                 offset += size;
 523         }
 524
 525         align = MONO_ARCH_FRAME_ALIGNMENT;
 526         frame_size += pad = (align - (frame_size & (align - 1))) & (align - 1);
 527         arg_info [k].pad = pad;
 528
 529         return frame_size;
 530 }
 531
 532 /*========================= End of Function ========================*/
 533
 534 /*------------------------------------------------------------------*/
 535 /*                                                                  */
 536 /* Name         - emit_unwind_regs.                                 */
 537 /*                                                                  */
 538 /* Function     - Determines if a value can be returned in one or   */
 539 /*                two registers.                                    */
 540 /*                                                                  */
 541 /*------------------------------------------------------------------*/
 542
 543 static void __inline__
 544 emit_unwind_regs(MonoCompile *cfg, guint8 *code, int start, int end, long offset)
 545 {
 546         int i;
 547
 548         for (i = start; i < end; i++) {
 549                 mono_emit_unwind_op_offset (cfg, code, i, offset);
 550                 offset += sizeof(gulong);
 551         }
 552 }
 553
 554 /*========================= End of Function ========================*/
 555
 556 /*------------------------------------------------------------------*/
 557 /*                                                                  */
 558 /* Name         - retFitsInReg.                                     */
 559 /*                                                                  */
 560 /* Function     - Determines if a value can be returned in one or   */
 561 /*                two registers.                                    */
 562 /*                                                                  */
 563 /*------------------------------------------------------------------*/
 564
 565 static inline gboolean
 566 retFitsInReg(guint32 size)
 567 {
 568         switch (size) {
 569                 case 0:
 570                 case 1:
 571                 case 2:
 572                 case 4:
 573                 case 8:
 574                         return (TRUE);
 575                 break;
 576                 default:
 577                         return (FALSE);
 578         }
 579 }
 580
 581 /*========================= End of Function ========================*/
 582
 583 /*------------------------------------------------------------------*/
 584 /*                                                                  */
 585 /* Name         - backStackPtr.                                     */
 586 /*                                                                  */
 587 /* Function     - Restore Stack Pointer to previous frame.          */
 588 /*                                                                  */
 589 /*------------------------------------------------------------------*/
 590
 591 static inline guint8 *
 592 backUpStackPtr(MonoCompile *cfg, guint8 *code)
 593 {
 594         int stackSize = cfg->stack_usage;
 595
 596         if (cfg->frame_reg != STK_BASE)
 597                 s390_lgr (code, STK_BASE, cfg->frame_reg);
 598
 599         if (s390_is_imm16 (stackSize)) {
 600                 s390_aghi  (code, STK_BASE, stackSize);
 601         } else {
 602                 while (stackSize > 32767) {
 603                         s390_aghi  (code, STK_BASE, 32767);
 604                         stackSize -= 32767;
 605                 }
 606                 s390_aghi  (code, STK_BASE, stackSize);
 607         }
 608         return (code);
 609 }
 610
 611 /*========================= End of Function ========================*/
 612
 613 /*------------------------------------------------------------------*/
 614 /*                                                                  */
 615 /* Name         - indent                                            */
 616 /*                                                                  */
 617 /* Function     - Perform nice indenting to current level           */
 618 /*                                                                  */
 619 /*------------------------------------------------------------------*/
 620
 621 static void
 622 indent (int diff) {
 623         int v;
 624         if (diff < 0)
 625                 indent_level += diff;
 626         v = indent_level;
 627         printf("%p [%3d] ",pthread_self(),v);
 628         while (v-- > 0) {
 629                 printf (". ");
 630         }
 631         if (diff > 0)
 632                 indent_level += diff;
 633 }
 634
 635 /*========================= End of Function ========================*/
 636
 637 /*------------------------------------------------------------------*/
 638 /*                                                                  */
 639 /* Name         - cvtMonoType                                       */
 640 /*                                                                  */
 641 /* Function     - Convert a mono-type to a string.                  */
 642 /*                                                                  */
 643 /*------------------------------------------------------------------*/
 644
 645 static const char *
 646 cvtMonoType(MonoTypeEnum t)
 647 {
 648   switch(t)
 649     {
 650     case MONO_TYPE_END:
 651       return "MONO_TYPE_END";
 652     case MONO_TYPE_VOID:
 653       return "MONO_TYPE_VOID";
 654     case MONO_TYPE_BOOLEAN:
 655       return "MONO_TYPE_BOOLEAN";
 656     case MONO_TYPE_CHAR:
 657       return "MONO_TYPE_CHAR";
 658     case MONO_TYPE_I1:
 659       return "MONO_TYPE_I1";
 660     case MONO_TYPE_U1:
 661       return "MONO_TYPE_U1";
 662     case MONO_TYPE_I2:
 663       return "MONO_TYPE_I2";
 664     case MONO_TYPE_U2:
 665       return "MONO_TYPE_U2";
 666     case MONO_TYPE_I4:
 667       return "MONO_TYPE_I4";
 668     case MONO_TYPE_U4:
 669       return "MONO_TYPE_U4";
 670     case MONO_TYPE_I8:
 671       return "MONO_TYPE_I8";
 672     case MONO_TYPE_U8:
 673       return "MONO_TYPE_U8";
 674     case MONO_TYPE_R4:
 675       return "MONO_TYPE_R4";
 676     case MONO_TYPE_R8:
 677       return "MONO_TYPE_R8";
 678     case MONO_TYPE_STRING:
 679       return "MONO_TYPE_STRING";
 680     case MONO_TYPE_PTR:
 681       return "MONO_TYPE_PTR";
 682     case MONO_TYPE_BYREF:
 683       return "MONO_TYPE_BYREF";
 684     case MONO_TYPE_VALUETYPE:
 685       return "MONO_TYPE_VALUETYPE";
 686     case MONO_TYPE_CLASS:
 687       return "MONO_TYPE_CLASS";
 688     case MONO_TYPE_VAR:
 689       return "MONO_TYPE_VAR";
 690     case MONO_TYPE_ARRAY:
 691       return "MONO_TYPE_ARRAY";
 692     case MONO_TYPE_GENERICINST:
 693       return "MONO_TYPE_GENERICINST";
 694     case MONO_TYPE_TYPEDBYREF:
 695       return "MONO_TYPE_TYPEDBYREF";
 696     case MONO_TYPE_I:
 697       return "MONO_TYPE_I";
 698     case MONO_TYPE_U:
 699       return "MONO_TYPE_U";
 700     case MONO_TYPE_FNPTR:
 701       return "MONO_TYPE_FNPTR";
 702     case MONO_TYPE_OBJECT:
 703       return "MONO_TYPE_OBJECT";
 704     case MONO_TYPE_SZARRAY:
 705       return "MONO_TYPE_SZARRAY";
 706     case MONO_TYPE_MVAR:
 707       return "MONO_TYPE_MVAR";
 708     case MONO_TYPE_CMOD_REQD:
 709       return "MONO_TYPE_CMOD_REQD";
 710     case MONO_TYPE_CMOD_OPT:
 711       return "MONO_TYPE_CMOD_OPT";
 712     case MONO_TYPE_INTERNAL:
 713       return "MONO_TYPE_INTERNAL";
 714     case MONO_TYPE_MODIFIER:
 715       return "MONO_TYPE_MODIFIER";
 716     case MONO_TYPE_SENTINEL:
 717       return "MONO_TYPE_SENTINEL";
 718     case MONO_TYPE_PINNED:
 719       return "MONO_TYPE_PINNED";
 720     default:
 721       ;
 722     }
 723   return "unknown";
 724 }
 725
 726 /*========================= End of Function ========================*/
 727
 728 /*------------------------------------------------------------------*/
 729 /*                                                                  */
 730 /* Name         - decodeParm                                        */
 731 /*                                                                  */
 732 /* Function     - Decode a parameter for the trace.                 */
 733 /*                                                                  */
 734 /*------------------------------------------------------------------*/
 735
 736 static void
 737 decodeParm(MonoType *type, void *curParm, int size)
 738 {
 739         guint32 simpleType;
 740
 741         if (type->byref) {
 742                 printf("[BYREF:%p], ", *((char **) curParm));
 743         } else {
 744                 simpleType = mono_type_get_underlying_type(type)->type;
 745 enum_parmtype:
 746                 switch (simpleType) {
 747                         case MONO_TYPE_I :
 748                                 printf ("[INTPTR:%p], ", *((int **) curParm));
 749                                 break;
 750                         case MONO_TYPE_U :
 751                                 printf ("[UINTPTR:%p], ", *((int **) curParm));
 752                                 break;
 753                         case MONO_TYPE_BOOLEAN :
 754                                 printf ("[BOOL:%ld], ", *((gint64 *) curParm));
 755                                 break;
 756                         case MONO_TYPE_CHAR :
 757                                 printf ("[CHAR:%c], ", *((int  *) curParm));
 758                                 break;
 759                         case MONO_TYPE_I1 :
 760                                 printf ("[INT1:%ld], ", *((gint64 *) curParm));
 761                                 break;
 762                         case MONO_TYPE_I2 :
 763                                 printf ("[INT2:%ld], ", *((gint64 *) curParm));
 764                                 break;
 765                         case MONO_TYPE_I4 :
 766                                 printf ("[INT4:%ld], ", *((gint64 *) curParm));
 767                                 break;
 768                         case MONO_TYPE_U1 :
 769                                 printf ("[UINT1:%lu], ", *((guint64 *) curParm));
 770                                 break;
 771                         case MONO_TYPE_U2 :
 772                                 printf ("[UINT2:%lu], ", *((guint64 *) curParm));
 773                                 break;
 774                         case MONO_TYPE_U4 :
 775                                 printf ("[UINT4:%lu], ", *((guint64 *) curParm));
 776                                 break;
 777                         case MONO_TYPE_U8 :
 778                                 printf ("[UINT8:%lu], ", *((guint64 *) curParm));
 779                                 break;
 780                         case MONO_TYPE_STRING : {
 781                                 MonoString *s = *((MonoString **) curParm);
 782                                 if (s) {
 783                                         g_assert (((MonoObject *) s)->vtable->klass == mono_defaults.string_class);
 784                                         printf("[STRING:%p:%s], ", s, mono_string_to_utf8(s));
 785                                 } else {
 786                                         printf("[STRING:null], ");
 787                                 }
 788                                 break;
 789                         }
 790                         case MONO_TYPE_CLASS :
 791                         case MONO_TYPE_OBJECT : {
 792                                 MonoObject *obj = *((MonoObject **) curParm);
 793                                 MonoClass *class;
 794                                 if ((obj) && (obj->vtable)) {
 795                                         printf("[CLASS/OBJ:");
 796                                         class = obj->vtable->klass;
 797                                         printf("%p [%p] ",obj,curParm);
 798                                         if (class == mono_defaults.string_class) {
 799                                                 printf("[STRING:%p:%s]",
 800                                                        obj, mono_string_to_utf8 ((MonoString *) obj));
 801                                         } else if (class == mono_defaults.int32_class) {
 802                                                 printf("[INT32:%p:%d]",
 803                                                         obj, *(gint32 *)((char *)obj + sizeof (MonoObject)));
 804                                         } else
 805                                                 printf("[%s.%s:%p]",
 806                                                        class->name_space, class->name, obj);
 807                                         printf("], ");
 808                                 } else {
 809                                         printf("[OBJECT:null], ");
 810                                 }
 811                                 break;
 812                         }
 813                         case MONO_TYPE_PTR :
 814                                 printf("[PTR:%p], ", *((gpointer **) (curParm)));
 815                                 break;
 816                         case MONO_TYPE_FNPTR :
 817                                 printf("[FNPTR:%p], ", *((gpointer **) (curParm)));
 818                                 break;
 819                         case MONO_TYPE_ARRAY :
 820                                 printf("[ARRAY:%p], ", *((gpointer **) (curParm)));
 821                                 break;
 822                         case MONO_TYPE_SZARRAY :
 823                                 printf("[SZARRAY:%p], ", *((gpointer **) (curParm)));
 824                                 break;
 825                         case MONO_TYPE_I8 :
 826                                 printf("[INT8:%ld], ", *((gint64 *) (curParm)));
 827                                 break;
 828                         case MONO_TYPE_R4 :
 829                                 printf("[FLOAT4:%g], ", *((float *) (curParm)));
 830                                 break;
 831                         case MONO_TYPE_R8 :
 832                                 printf("[FLOAT8:%g], ", *((double *) (curParm)));
 833                                 break;
 834                         case MONO_TYPE_VALUETYPE : {
 835                                 int i;
 836                                 MonoMarshalType *info;
 837
 838                                 if (type->data.klass->enumtype) {
 839                                         simpleType = mono_class_enum_basetype (type->data.klass)->type;
 840                                         printf("{VALUETYPE} - ");
 841                                         goto enum_parmtype;
 842                                 }
 843
 844                                 info = mono_marshal_load_type_info (type->data.klass);
 845
 846                                 if ((info->native_size == sizeof(float)) &&
 847                                     (info->num_fields  == 1) &&
 848                                     (info->fields[0].field->type->type == MONO_TYPE_R4)) {
 849                                                 printf("[FLOAT4:%f], ", *((float *) (curParm)));
 850                                         break;
 851                                 }
 852
 853                                 if ((info->native_size == sizeof(double)) &&
 854                                     (info->num_fields  == 1) &&
 855                                     (info->fields[0].field->type->type == MONO_TYPE_R8)) {
 856                                         printf("[FLOAT8:%g], ", *((double *) (curParm)));
 857                                         break;
 858                                 }
 859
 860                                 printf("[VALUETYPE:");
 861                                 for (i = 0; i < size; i++)
 862                                         printf("%02x,", *((guint8 *)curParm+i));
 863                                 printf("], ");
 864                                 break;
 865                         }
 866                         case MONO_TYPE_TYPEDBYREF: {
 867                                 int i;
 868                                 printf("[TYPEDBYREF:");
 869                                 for (i = 0; i < size; i++)
 870                                         printf("%02x,", *((guint8 *)curParm+i));
 871                                 printf("]");
 872                                 break;
 873                         }
 874                         default :
 875                                 printf("[%s], ",cvtMonoType(simpleType));
 876                 }
 877         }
 878 }
 879
 880 /*========================= End of Function ========================*/
 881
 882 /*------------------------------------------------------------------*/
 883 /*                                                                  */
 884 /* Name         - enter_method                                      */
 885 /*                                                                  */
 886 /* Function     - Perform tracing of the entry to the current       */
 887 /*                method.                                           */
 888 /*                                                                  */
 889 /*------------------------------------------------------------------*/
 890
 891 static void
 892 enter_method (MonoMethod *method, RegParm *rParm, char *sp)
 893 {
 894         int i, oParm = 0, iParm = 0;
 895         MonoClass *class;
 896         MonoObject *obj;
 897         MonoMethodSignature *sig;
 898         char *fname;
 899         guint64 ip;
 900         CallInfo *cinfo;
 901         ArgInfo *ainfo;
 902         void *curParm;
 903
 904         fname = mono_method_full_name (method, TRUE);
 905         indent (1);
 906         printf ("ENTER: %s ", fname);
 907         g_free (fname);
 908
 909         ip  = (*(guint64 *) (sp+S390_RET_ADDR_OFFSET));
 910         printf ("ip: %p sp: %p - ", (gpointer) ip, sp);
 911
 912         if (rParm == NULL)
 913                 return;
 914
 915         sig = mono_method_signature (method);
 916
 917         cinfo = get_call_info (NULL, NULL, sig);
 918
 919         if (cinfo->struct_ret) {
 920                 printf ("[STRUCTRET:%p], ", (gpointer) rParm->gr[0]);
 921                 iParm = 1;
 922         }
 923
 924         if (sig->hasthis) {
 925                 gpointer *this = (gpointer *) rParm->gr[iParm];
 926                 obj = (MonoObject *) this;
 927                 switch(method->klass->this_arg.type) {
 928                 case MONO_TYPE_VALUETYPE:
 929                         if (obj) {
 930                                 guint64 *value = (guint64 *) ((uintptr_t)this + sizeof(MonoObject));
 931                                 printf("this:[value:%p:%016lx], ", this, *value);
 932                         } else
 933                                 printf ("this:[NULL], ");
 934                         break;
 935                 case MONO_TYPE_STRING:
 936                         if (obj) {
 937                                 if (obj->vtable) {
 938                                         class = obj->vtable->klass;
 939                                         if (class == mono_defaults.string_class) {
 940                                                 printf ("this:[STRING:%p:%s], ",
 941                                                         obj, mono_string_to_utf8 ((MonoString *)obj));
 942                                         } else {
 943                                                 printf ("this:%p[%s.%s], ",
 944                                                         obj, class->name_space, class->name);
 945                                         }
 946                                 } else
 947                                         printf("vtable:[NULL], ");
 948                         } else
 949                                 printf ("this:[NULL], ");
 950                         break;
 951                 default :
 952                         printf("this[%s]: %p, ",cvtMonoType(method->klass->this_arg.type),this);
 953                 }
 954                 oParm++;
 955         }
 956
 957         for (i = 0; i < sig->param_count; ++i) {
 958                 ainfo = &cinfo->args[i + oParm];
 959                 switch (ainfo->regtype) {
 960                         case RegTypeGeneral :
 961                                 decodeParm(sig->params[i], &(rParm->gr[ainfo->reg-2]), ainfo->size);
 962                                 break;
 963                         case RegTypeFP :
 964                                 decodeParm(sig->params[i], &(rParm->fp[ainfo->reg]), ainfo->size);
 965                                 break;
 966                         case RegTypeBase :
 967                                 decodeParm(sig->params[i], sp+ainfo->offset, ainfo->size);
 968                                 break;
 969                         case RegTypeStructByVal :
 970                                 if (ainfo->reg != STK_BASE) {
 971                                         int offset = sizeof(glong) - ainfo->size;
 972                                         curParm = &(rParm->gr[ainfo->reg-2])+offset;
 973                                 }
 974                                 else
 975                                         curParm = sp+ainfo->offset;
 976
 977                                 if (retFitsInReg (ainfo->vtsize))
 978                                         decodeParm(sig->params[i],
 979                                                    curParm,
 980                                                    ainfo->size);
 981                                 else
 982                                         decodeParm(sig->params[i],
 983                                                    *((char **) curParm),
 984                                                    ainfo->vtsize);
 985                                 break;
 986                         case RegTypeStructByAddr :
 987                                 if (ainfo->reg != STK_BASE)
 988                                         curParm = &(rParm->gr[ainfo->reg-2]);
 989                                 else
 990                                         curParm = sp+ainfo->offset;
 991
 992                                 decodeParm(sig->params[i],
 993                                            *((char **) curParm),
 994                                            ainfo->vtsize);
 995                                 break;
 996
 997                         default :
 998                                 printf("???, ");
 999                 }
1000         }
1001         printf("\n");
1002         g_free(cinfo);
1003 }
1004
1005 /*========================= End of Function ========================*/
1006
1007 /*------------------------------------------------------------------*/
1008 /*                                                                  */
1009 /* Name         - leave_method                                      */
1010 /*                                                                  */
1011 /* Function     -                                                   */
1012 /*                                                                  */
1013 /*------------------------------------------------------------------*/
1014
1015 static void
1016 leave_method (MonoMethod *method, ...)
1017 {
1018         MonoType *type;
1019         char *fname;
1020         guint64 ip;
1021         va_list ap;
1022
1023         va_start(ap, method);
1024
1025         fname = mono_method_full_name (method, TRUE);
1026         indent (-1);
1027         printf ("LEAVE: %s", fname);
1028         g_free (fname);
1029
1030         type = mono_method_signature (method)->ret;
1031
1032 handle_enum:
1033         switch (type->type) {
1034         case MONO_TYPE_VOID:
1035                 break;
1036         case MONO_TYPE_BOOLEAN: {
1037                 int val = va_arg (ap, int);
1038                 if (val)
1039                         printf ("[TRUE:%d]", val);
1040                 else
1041                         printf ("[FALSE]");
1042
1043                 break;
1044         }
1045         case MONO_TYPE_CHAR: {
1046                 int val = va_arg (ap, int);
1047                 printf ("[CHAR:%d]", val);
1048                 break;
1049         }
1050         case MONO_TYPE_I1: {
1051                 int val = va_arg (ap, int);
1052                 printf ("[INT1:%d]", val);
1053                 break;
1054         }
1055         case MONO_TYPE_U1: {
1056                 int val = va_arg (ap, int);
1057                 printf ("[UINT1:%d]", val);
1058                 break;
1059         }
1060         case MONO_TYPE_I2: {
1061                 int val = va_arg (ap, int);
1062                 printf ("[INT2:%d]", val);
1063                 break;
1064         }
1065         case MONO_TYPE_U2: {
1066                 int val = va_arg (ap, int);
1067                 printf ("[UINT2:%d]", val);
1068                 break;
1069         }
1070         case MONO_TYPE_I4: {
1071                 int val = va_arg (ap, int);
1072                 printf ("[INT4:%d]", val);
1073                 break;
1074         }
1075         case MONO_TYPE_U4: {
1076                 int val = va_arg (ap, int);
1077                 printf ("[UINT4:%d]", val);
1078                 break;
1079         }
1080         case MONO_TYPE_I: {
1081                 gint64 val = va_arg (ap, gint64);
1082                 printf ("[INT:%ld]", val);
1083                 printf("]");
1084                 break;
1085         }
1086         case MONO_TYPE_U: {
1087                 gint64 val = va_arg (ap, gint64);
1088                 printf ("[UINT:%lu]", val);
1089                 printf("]");
1090                 break;
1091         }
1092         case MONO_TYPE_STRING: {
1093                 MonoString *s = va_arg (ap, MonoString *);
1094 ;
1095                 if (s) {
1096                         g_assert (((MonoObject *)s)->vtable->klass == mono_defaults.string_class);
1097                         printf ("[STRING:%p:%s]", s, mono_string_to_utf8 (s));
1098                 } else
1099                         printf ("[STRING:null], ");
1100                 break;
1101         }
1102         case MONO_TYPE_CLASS:
1103         case MONO_TYPE_OBJECT: {
1104                 MonoObject *o = va_arg (ap, MonoObject *);
1105
1106                 if ((o) && (o->vtable)) {
1107                         if (o->vtable->klass == mono_defaults.boolean_class) {
1108                                 printf ("[BOOLEAN:%p:%d]", o, *((guint8 *)o + sizeof (MonoObject)));
1109                         } else if  (o->vtable->klass == mono_defaults.int32_class) {
1110                                 printf ("[INT32:%p:%d]", o, *((gint32 *)((char *)o + sizeof (MonoObject))));
1111                         } else if  (o->vtable->klass == mono_defaults.int64_class) {
1112                                 printf ("[INT64:%p:%ld]", o, *((gint64 *)((char *)o + sizeof (MonoObject))));
1113                         } else
1114                                 printf ("[%s.%s:%p]", o->vtable->klass->name_space, o->vtable->klass->name, o);
1115                 } else
1116                         printf ("[OBJECT:%p]", o);
1117
1118                 break;
1119         }
1120         case MONO_TYPE_PTR:
1121         case MONO_TYPE_FNPTR:
1122         case MONO_TYPE_ARRAY:
1123         case MONO_TYPE_SZARRAY: {
1124                 gpointer p = va_arg (ap, gpointer);
1125                 printf ("[result=%p]", p);
1126                 break;
1127         }
1128         case MONO_TYPE_I8: {
1129                 gint64 l =  va_arg (ap, gint64);
1130                 printf ("[LONG:%ld]", l);
1131                 break;
1132         }
1133         case MONO_TYPE_U8: {
1134                 guint64 l =  va_arg (ap, guint64);
1135                 printf ("[ULONG:%lu]", l);
1136                 break;
1137         }
1138         case MONO_TYPE_R4: {
1139                 double f = va_arg (ap, double);
1140                 printf ("[FLOAT4:%g]\n", f);
1141                 break;
1142         }
1143         case MONO_TYPE_R8: {
1144                 double f = va_arg (ap, double);
1145                 printf ("[FLOAT8:%g]\n", f);
1146                 break;
1147         }
1148         case MONO_TYPE_VALUETYPE: {
1149                 MonoMarshalType *info;
1150                 if (type->data.klass->enumtype) {
1151                         type = mono_class_enum_basetype (type->data.klass);
1152                         goto handle_enum;
1153                 } else {
1154                         int size, align;
1155
1156                         info = mono_marshal_load_type_info (type->data.klass);
1157
1158                         if ((info->native_size == sizeof(float)) &&
1159                             (info->num_fields  == 1) &&
1160                             (info->fields[0].field->type->type == MONO_TYPE_R4)) {
1161                                 double f = va_arg (ap, double);
1162                                 printf("[FLOAT4:%g]\n", (double) f);
1163                                 break;
1164                         }
1165
1166                         if ((info->native_size == sizeof(double)) &&
1167                             (info->num_fields  == 1) &&
1168                             (info->fields[0].field->type->type == MONO_TYPE_R8)) {
1169                                 double f = va_arg (ap, double);
1170                                 printf("[FLOAT8:%g]\n", f);
1171                                 break;
1172                         }
1173
1174                         size = mono_type_size (type, &align);
1175                         switch (size) {
1176                                 case 1: {
1177                                         guint32 p = va_arg (ap, guint32);
1178                                         printf ("[%02x]\n",p);
1179                                         break;
1180                                 }
1181                                 case 2: {
1182                                         guint32 p = va_arg (ap, guint32);
1183                                         printf ("[%04x]\n",p);
1184                                         break;
1185                                 }
1186                                 case 4: {
1187                                         guint32 p = va_arg (ap, guint32);
1188                                         printf ("[%08x]\n",p);
1189                                         break;
1190                                 }
1191                                 case 8: {
1192                                         guint64 p = va_arg (ap, guint64);
1193                                         printf ("[%016lx]\n",p);
1194                                         break;
1195                                 }
1196                                 default: {
1197                                         gpointer p = va_arg (ap, gpointer);
1198                                         printf ("[VALUETYPE] %p\n",p);
1199                                 }
1200                         }
1201                 }
1202                 break;
1203         }
1204         case MONO_TYPE_TYPEDBYREF: {
1205                 guint8 *p = va_arg (ap, gpointer);
1206                 int j, size, align;
1207                 size = mono_type_size (type, &align);
1208                 switch (size) {
1209                 case 1:
1210                 case 2:
1211                 case 4:
1212                 case 8:
1213                         printf ("[");
1214                         for (j = 0; p && j < size; j++)
1215                                 printf ("%02x,", p [j]);
1216                         printf ("]\n");
1217                         break;
1218                 default:
1219                         printf ("[TYPEDBYREF]\n");
1220                 }
1221         }
1222                 break;
1223         default:
1224                 printf ("(unknown return type %x)",
1225                         mono_method_signature (method)->ret->type);
1226         }
1227
1228         ip = ((gint64) __builtin_extract_return_addr (__builtin_return_address (0)));
1229         printf (" ip: %p\n", (gpointer) ip);
1230 }
1231
1232 /*========================= End of Function ========================*/
1233
1234 /*------------------------------------------------------------------*/
1235 /*                                                                  */
1236 /* Name         - mono_arch_cpu_init                                */
1237 /*                                                                  */
1238 /* Function     - Perform CPU specific initialization to execute    */
1239 /*                managed code.                                     */
1240 /*                                                                  */
1241 /*------------------------------------------------------------------*/
1242
1243 void
1244 mono_arch_cpu_init (void)
1245 {
1246 }
1247
1248 /*========================= End of Function ========================*/
1249
1250 /*------------------------------------------------------------------*/
1251 /*                                                                  */
1252 /* Name         - mono_arch_init.                                   */
1253 /*                                                                  */
1254 /* Function     - Initialize architecture specific code.            */
1255 /*                                                                  */
1256 /*------------------------------------------------------------------*/
1257
1258 void
1259 mono_arch_init (void)
1260 {
1261         guint8 *code;
1262
1263         mono_mutex_init_recursive (&mini_arch_mutex);
1264
1265         ss_trigger_page = mono_valloc (NULL, mono_pagesize (), MONO_MMAP_READ);
1266         bp_trigger_page = mono_valloc (NULL, mono_pagesize (), MONO_MMAP_READ);
1267         mono_mprotect (bp_trigger_page, mono_pagesize (), 0);
1268
1269         code = (guint8 *) &breakpointCode;
1270         s390_basr(code, s390_r13, 0);
1271         s390_j(code, 6);
1272         s390_llong(code, 0);
1273         s390_lg(code, s390_r13, 0, s390_r13, 4);
1274         s390_lg(code, s390_r0, 0, s390_r13, 0);
1275 }
1276
1277 /*========================= End of Function ========================*/
1278
1279 /*------------------------------------------------------------------*/
1280 /*                                                                  */
1281 /* Name         - mono_arch_cleanup.                                */
1282 /*                                                                  */
1283 /* Function     - Cleanup architecture specific code    .           */
1284 /*                                                                  */
1285 /*------------------------------------------------------------------*/
1286
1287 void
1288 mono_arch_cleanup (void)
1289 {
1290         if (ss_trigger_page)
1291                 mono_vfree (ss_trigger_page, mono_pagesize ());
1292         if (bp_trigger_page)
1293                 mono_vfree (bp_trigger_page, mono_pagesize ());
1294         mono_mutex_destroy (&mini_arch_mutex);
1295 }
1296
1297 /*========================= End of Function ========================*/
1298
1299 /*------------------------------------------------------------------*/
1300 /*                                                                  */
1301 /* Name         - mono_arch_cpu_optimizations                       */
1302 /*                                                                  */
1303 /* Function     - Returns the optimizations supported on this CPU   */
1304 /*                                                                  */
1305 /*------------------------------------------------------------------*/
1306
1307 guint32
1308 mono_arch_cpu_optimizations (guint32 *exclude_mask)
1309 {
1310         guint32 opts = 0;
1311
1312         /*----------------------------------------------------------*/
1313         /* No s390-specific optimizations yet                       */
1314         /*----------------------------------------------------------*/
1315         *exclude_mask = MONO_OPT_LINEARS;
1316         return opts;
1317 }
1318
1319 /*========================= End of Function ========================*/
1320
1321 /*------------------------------------------------------------------*/
1322 /*                                                                  */
1323 /* Name         - mono_arch_cpu_enumerate_simd_versions             */
1324 /*                                                                  */
1325 /* Function     - Returns the SIMD instruction sets on this CPU     */
1326 /*                                                                  */
1327 /*------------------------------------------------------------------*/
1328 guint32
1329 mono_arch_cpu_enumerate_simd_versions (void)
1330 {
1331         /* SIMD is currently unimplemented */
1332         return 0;
1333 }
1334 /*========================= End of Function ========================*/
1335
1336 /*------------------------------------------------------------------*/
1337 /*                                                                  */
1338 /* Name         - mono_arch_get_allocatable_int_vars                */
1339 /*                                                                  */
1340 /* Function     -                                                   */
1341 /*                                                                  */
1342 /*------------------------------------------------------------------*/
1343
1344 GList *
1345 mono_arch_get_allocatable_int_vars (MonoCompile *cfg)
1346 {
1347         GList *vars = NULL;
1348         int i;
1349
1350         for (i = 0; i < cfg->num_varinfo; i++) {
1351                 MonoInst *ins = cfg->varinfo [i];
1352                 MonoMethodVar *vmv = MONO_VARINFO (cfg, i);
1353
1354                 /* unused vars */
1355                 if (vmv->range.first_use.abs_pos >= vmv->range.last_use.abs_pos)
1356                         continue;
1357
1358                 if (ins->flags & (MONO_INST_VOLATILE|MONO_INST_INDIRECT) ||
1359                     (ins->opcode != OP_LOCAL && ins->opcode != OP_ARG))
1360                         continue;
1361
1362                 /* we can only allocate 32 bit values */
1363                 if (mono_is_regsize_var(ins->inst_vtype)) {
1364                         g_assert (MONO_VARINFO (cfg, i)->reg == -1);
1365                         g_assert (i == vmv->idx);
1366                         vars = mono_varlist_insert_sorted (cfg, vars, vmv, FALSE);
1367                 }
1368         }
1369
1370         return vars;
1371 }
1372
1373 /*========================= End of Function ========================*/
1374
1375 /*------------------------------------------------------------------*/
1376 /*                                                                  */
1377 /* Name         - mono_arch_global_int_regs                         */
1378 /*                                                                  */
1379 /* Function     - Return a list of usable integer registers.        */
1380 /*                                                                  */
1381 /*------------------------------------------------------------------*/
1382
1383 GList *
1384 mono_arch_get_global_int_regs (MonoCompile *cfg)
1385 {
1386         GList *regs = NULL;
1387         MonoMethodHeader *header;
1388         int i, top = 13;
1389
1390         header = cfg->header;
1391         if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
1392                 cfg->frame_reg = s390_r11;
1393
1394
1395         /* FIXME: s390_r12 is reserved for bkchain_reg. Only reserve it if needed */
1396         top = 12;
1397         for (i = 8; i < top; ++i) {
1398                 if (cfg->frame_reg != i)
1399                         regs = g_list_prepend (regs, GUINT_TO_POINTER (i));
1400         }
1401
1402         return regs;
1403 }
1404
1405 /*========================= End of Function ========================*/
1406
1407 /*------------------------------------------------------------------*/
1408 /*                                                                  */
1409 /* Name         -  mono_arch_flush_icache                           */
1410 /*                                                                  */
1411 /* Function     -  Flush the CPU icache.                            */
1412 /*                                                                  */
1413 /*------------------------------------------------------------------*/
1414
1415 void
1416 mono_arch_flush_icache (guint8 *code, gint size)
1417 {
1418 }
1419
1420 /*========================= End of Function ========================*/
1421
1422 /*------------------------------------------------------------------*/
1423 /*                                                                  */
1424 /* Name         - add_general                                       */
1425 /*                                                                  */
1426 /* Function     - Determine code and stack size incremements for a  */
1427 /*                parameter.                                        */
1428 /*                                                                  */
1429 /*------------------------------------------------------------------*/
1430
1431 static void inline
1432 add_general (guint *gr, size_data *sz, ArgInfo *ainfo)
1433 {
1434         if (*gr > S390_LAST_ARG_REG) {
1435                 sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1436                 ainfo->offset   = sz->stack_size;
1437                 ainfo->reg      = STK_BASE;
1438                 ainfo->regtype  = RegTypeBase;
1439                 sz->stack_size += sizeof(long);
1440                 sz->local_size += sizeof(long);
1441                 sz->offStruct  += sizeof(long);
1442                 sz->code_size  += 12;
1443         } else {
1444                 ainfo->reg      = *gr;
1445                 sz->code_size  += 8;
1446         }
1447         (*gr) ++;
1448 }
1449
1450 /*========================= End of Function ========================*/
1451
1452 /*------------------------------------------------------------------*/
1453 /*                                                                  */
1454 /* Name         - add_stackParm                                     */
1455 /*                                                                  */
1456 /* Function     - Determine code and stack size incremements for a  */
1457 /*                parameter.                                        */
1458 /*                                                                  */
1459 /*------------------------------------------------------------------*/
1460
1461 static void inline
1462 add_stackParm (guint *gr, size_data *sz, ArgInfo *ainfo, gint size)
1463 {
1464         if (*gr > S390_LAST_ARG_REG) {
1465                 sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1466                 ainfo->reg          = STK_BASE;
1467                 ainfo->offset   = sz->stack_size;
1468                 ainfo->regtype  = RegTypeStructByAddrOnStack;
1469                 sz->stack_size += sizeof (gpointer);
1470                 sz->parm_size  += sizeof(gpointer);
1471                 sz->offStruct  += sizeof(gpointer);
1472         } else {
1473                 ainfo->reg      = *gr;
1474                 ainfo->offset   = sz->stack_size;
1475                 ainfo->regtype  = RegTypeStructByAddr;
1476         }
1477         (*gr) ++;
1478         ainfo->offparm  = sz->offset;
1479         sz->offset      = S390_ALIGN(sz->offset+size, sizeof(long));
1480         ainfo->size     = size;
1481         ainfo->vtsize   = size;
1482         sz->parm_size  += size;
1483 }
1484
1485 /*========================= End of Function ========================*/
1486
1487 /*------------------------------------------------------------------*/
1488 /*                                                                  */
1489 /* Name         - add_float                                         */
1490 /*                                                                  */
1491 /* Function     - Determine code and stack size incremements for a  */
1492 /*                float parameter.                                  */
1493 /*                                                                  */
1494 /*------------------------------------------------------------------*/
1495
1496 static void inline
1497 add_float (guint *fr,  size_data *sz, ArgInfo *ainfo)
1498 {
1499         if ((*fr) <= S390_LAST_FPARG_REG) {
1500                 ainfo->regtype = RegTypeFP;
1501                 ainfo->reg     = *fr;
1502                 sz->code_size += 4;
1503                 (*fr) += 2;
1504         }
1505         else {
1506                 ainfo->offset   = sz->stack_size;
1507                 ainfo->reg      = STK_BASE;
1508                 ainfo->regtype  = RegTypeBase;
1509                 sz->code_size  += 4;
1510                 sz->stack_size += sizeof(double);
1511                 sz->local_size += sizeof(double);
1512                 sz->offStruct  += sizeof(double);
1513         }
1514 }
1515
1516 /*========================= End of Function ========================*/
1517
1518 /*------------------------------------------------------------------*/
1519 /*                                                                  */
1520 /* Name         - get_call_info                                     */
1521 /*                                                                  */
1522 /* Function     - Determine the amount of space required for code   */
1523 /*                and stack. In addition determine starting points  */
1524 /*                for stack-based parameters, and area for struct-  */
1525 /*                ures being returned on the stack.                 */
1526 /*                                                                  */
1527 /*------------------------------------------------------------------*/
1528
1529 static CallInfo *
1530 get_call_info (MonoCompile *cfg, MonoMemPool *mp, MonoMethodSignature *sig)
1531 {
1532         guint i, fr, gr, size, pstart;
1533         int nParm = sig->hasthis + sig->param_count;
1534         MonoType *ret_type;
1535         guint32 simpleType, align;
1536         gboolean is_pinvoke = sig->pinvoke;
1537         CallInfo *cinfo;
1538         size_data *sz;
1539         MonoGenericSharingContext *gsctx = cfg ? cfg->generic_sharing_context : NULL;
1540
1541         if (mp)
1542                 cinfo = mono_mempool_alloc0 (mp, sizeof (CallInfo) + sizeof (ArgInfo) * nParm);
1543         else
1544                 cinfo = g_malloc0 (sizeof (CallInfo) + sizeof (ArgInfo) * nParm);
1545
1546         fr                = 0;
1547         gr                = s390_r2;
1548         nParm             = 0;
1549         cinfo->struct_ret = 0;
1550         sz                = &cinfo->sz;
1551         sz->retStruct     = 0;
1552         sz->offset        = 0;
1553         sz->offStruct     = S390_MINIMAL_STACK_SIZE;
1554         sz->stack_size    = S390_MINIMAL_STACK_SIZE;
1555         sz->code_size     = 0;
1556         sz->parm_size     = 0;
1557         sz->local_size    = 0;
1558         align             = 0;
1559         size              = 0;
1560
1561         /*----------------------------------------------------------*/
1562         /* We determine the size of the return code/stack in case we*/
1563         /* need to reserve a register to be used to address a stack */
1564         /* area that the callee will use.                           */
1565         /*----------------------------------------------------------*/
1566
1567         ret_type = mini_type_get_underlying_type (gsctx, sig->ret);
1568         ret_type = mini_get_basic_type_from_generic (gsctx, ret_type);
1569         simpleType = ret_type->type;
1570 enum_retvalue:
1571         switch (simpleType) {
1572                 case MONO_TYPE_BOOLEAN:
1573                 case MONO_TYPE_I1:
1574                 case MONO_TYPE_U1:
1575                 case MONO_TYPE_I2:
1576                 case MONO_TYPE_U2:
1577                 case MONO_TYPE_CHAR:
1578                 case MONO_TYPE_I4:
1579                 case MONO_TYPE_U4:
1580                 case MONO_TYPE_I:
1581                 case MONO_TYPE_U:
1582                 case MONO_TYPE_CLASS:
1583                 case MONO_TYPE_OBJECT:
1584                 case MONO_TYPE_SZARRAY:
1585                 case MONO_TYPE_ARRAY:
1586                 case MONO_TYPE_PTR:
1587                 case MONO_TYPE_FNPTR:
1588                 case MONO_TYPE_STRING:
1589                         cinfo->ret.reg = s390_r2;
1590                         sz->code_size += 4;
1591                         break;
1592                 case MONO_TYPE_R4:
1593                 case MONO_TYPE_R8:
1594                         cinfo->ret.reg = s390_f0;
1595                         sz->code_size += 4;
1596                         break;
1597                 case MONO_TYPE_I8:
1598                 case MONO_TYPE_U8:
1599                         cinfo->ret.reg = s390_r2;
1600                         sz->code_size += 4;
1601                         break;
1602                 case MONO_TYPE_GENERICINST:
1603                         if (!mono_type_generic_inst_is_valuetype (sig->ret)) {
1604                                 cinfo->ret.reg = s390_r2;
1605                                 sz->code_size += 4;
1606                                 break;
1607                         }
1608                         /* Fall through */
1609                 case MONO_TYPE_VALUETYPE: {
1610                         MonoClass *klass = mono_class_from_mono_type (sig->ret);
1611                         if (klass->enumtype) {
1612                                 simpleType = mono_class_enum_basetype (klass)->type;
1613                                 goto enum_retvalue;
1614                         }
1615                         size = mini_type_stack_size_full (gsctx, &klass->byval_arg, NULL, sig->pinvoke);
1616
1617                         cinfo->struct_ret = 1;
1618                         cinfo->ret.size   = size;
1619                         cinfo->ret.vtsize = size;
1620                         break;
1621                 }
1622                 case MONO_TYPE_TYPEDBYREF:
1623                         size = sizeof (MonoTypedRef);
1624                         cinfo->struct_ret = 1;
1625                         cinfo->ret.size   = size;
1626                         cinfo->ret.vtsize = size;
1627                         break;
1628                 case MONO_TYPE_VOID:
1629                         break;
1630                 default:
1631                         g_error ("Can't handle as return value 0x%x", sig->ret->type);
1632         }
1633
1634
1635         pstart = 0;
1636         /*
1637          * To simplify get_this_arg_reg () and LLVM integration, emit the vret arg after
1638          * the first argument, allowing 'this' to be always passed in the first arg reg.
1639          * Also do this if the first argument is a reference type, since virtual calls
1640          * are sometimes made using calli without sig->hasthis set, like in the delegate
1641          * invoke wrappers.
1642          */
1643         if (cinfo->struct_ret && !is_pinvoke &&
1644             (sig->hasthis ||
1645              (sig->param_count > 0 &&
1646               MONO_TYPE_IS_REFERENCE (mini_type_get_underlying_type (gsctx, sig->params [0]))))) {
1647                 if (sig->hasthis) {
1648                         cinfo->args[nParm].size = sizeof (gpointer);
1649                         add_general (&gr, sz, cinfo->args + nParm);
1650                 } else {
1651                         cinfo->args[nParm].size = sizeof (gpointer);
1652                         add_general (&gr, sz, &cinfo->args [sig->hasthis + nParm]);
1653                         pstart = 1;
1654                 }
1655                 nParm ++;
1656                 cinfo->vret_arg_index = 1;
1657                 cinfo->ret.reg = gr;
1658                 gr ++;
1659         } else {
1660                 /* this */
1661                 if (sig->hasthis) {
1662                         cinfo->args[nParm].size = sizeof (gpointer);
1663                         add_general (&gr, sz, cinfo->args + nParm);
1664                         nParm ++;
1665                 }
1666
1667                 if (cinfo->struct_ret) {
1668                         cinfo->ret.reg = gr;
1669                         gr ++;
1670                 }
1671         }
1672
1673         if ((sig->call_convention == MONO_CALL_VARARG) && (sig->param_count == 0)) {
1674                 gr = S390_LAST_ARG_REG + 1;
1675                 fr = S390_LAST_FPARG_REG + 1;
1676
1677                 /* Emit the signature cookie just before the implicit arguments */
1678                 add_general (&gr, sz, &cinfo->sigCookie);
1679         }
1680
1681         /*----------------------------------------------------------*/
1682         /* We determine the size of the parameter code and stack    */
1683         /* requirements by checking the types and sizes of the      */
1684         /* parameters.                                              */
1685         /*----------------------------------------------------------*/
1686
1687         for (i = pstart; i < sig->param_count; ++i) {
1688                 MonoType *ptype;
1689
1690                 /*--------------------------------------------------*/
1691                 /* Handle vararg type calls. All args are put on    */
1692                 /* the stack.                                       */
1693                 /*--------------------------------------------------*/
1694                 if ((sig->call_convention == MONO_CALL_VARARG) &&
1695                     (i == sig->sentinelpos)) {
1696                         gr = S390_LAST_ARG_REG + 1;
1697                         fr = S390_LAST_FPARG_REG + 1;
1698                         add_general (&gr, sz, &cinfo->sigCookie);
1699                 }
1700
1701                 if (sig->params [i]->byref) {
1702                         add_general (&gr, sz, cinfo->args+nParm);
1703                         cinfo->args[nParm].size = sizeof(gpointer);
1704                         nParm++;
1705                         continue;
1706                 }
1707
1708                 ptype = mini_type_get_underlying_type (gsctx, sig->params [i]);
1709                 simpleType = ptype->type;
1710                 cinfo->args[nParm].type = simpleType;
1711                 switch (simpleType) {
1712                 case MONO_TYPE_BOOLEAN:
1713                 case MONO_TYPE_I1:
1714                 case MONO_TYPE_U1:
1715                         cinfo->args[nParm].size = sizeof(char);
1716                         add_general (&gr, sz, cinfo->args+nParm);
1717                         nParm++;
1718                         break;
1719                 case MONO_TYPE_I2:
1720                 case MONO_TYPE_U2:
1721                 case MONO_TYPE_CHAR:
1722                         cinfo->args[nParm].size = sizeof(short);
1723                         add_general (&gr, sz, cinfo->args+nParm);
1724                         nParm++;
1725                         break;
1726                 case MONO_TYPE_I4:
1727                 case MONO_TYPE_U4:
1728                         cinfo->args[nParm].size = sizeof(int);
1729                         add_general (&gr, sz, cinfo->args+nParm);
1730                         nParm++;
1731                         break;
1732                 case MONO_TYPE_I:
1733                 case MONO_TYPE_U:
1734                 case MONO_TYPE_PTR:
1735                 case MONO_TYPE_FNPTR:
1736                 case MONO_TYPE_CLASS:
1737                 case MONO_TYPE_OBJECT:
1738                 case MONO_TYPE_STRING:
1739                 case MONO_TYPE_SZARRAY:
1740                 case MONO_TYPE_ARRAY:
1741                         cinfo->args[nParm].size = sizeof(gpointer);
1742                         add_general (&gr, sz, cinfo->args+nParm);
1743                         nParm++;
1744                         break;
1745                 case MONO_TYPE_I8:
1746                 case MONO_TYPE_U8:
1747                         cinfo->args[nParm].size = sizeof(long long);
1748                         add_general (&gr, sz, cinfo->args+nParm);
1749                         nParm++;
1750                         break;
1751                 case MONO_TYPE_R4:
1752                         cinfo->args[nParm].size = sizeof(float);
1753                         add_float (&fr, sz, cinfo->args+nParm);
1754                         nParm++;
1755                         break;
1756                 case MONO_TYPE_R8:
1757                         cinfo->args[nParm].size = sizeof(double);
1758                         add_float (&fr, sz, cinfo->args+nParm);
1759                         nParm++;
1760                         break;
1761                 case MONO_TYPE_GENERICINST:
1762                         if (!mono_type_generic_inst_is_valuetype (ptype)) {
1763                                 cinfo->args[nParm].size = sizeof(gpointer);
1764                                 add_general (&gr, sz, cinfo->args+nParm);
1765                                 nParm++;
1766                                 break;
1767                         }
1768                         /* Fall through */
1769                 case MONO_TYPE_VALUETYPE: {
1770                         MonoMarshalType *info;
1771                         MonoClass *klass = mono_class_from_mono_type (ptype);
1772
1773                         if (sig->pinvoke)
1774                                 size = mono_class_native_size(klass, NULL);
1775                         else
1776                                 size = mono_class_value_size(klass, NULL);
1777
1778                         if (simpleType != MONO_TYPE_GENERICINST) {
1779                                 info = mono_marshal_load_type_info(klass);
1780
1781                                 if ((info->native_size == sizeof(float)) &&
1782                                     (info->num_fields  == 1) &&
1783                                     (info->fields[0].field->type->type == MONO_TYPE_R4)) {
1784                                         cinfo->args[nParm].size = sizeof(float);
1785                                         add_float(&fr, sz, cinfo->args+nParm);
1786                                         nParm ++;
1787                                         break;
1788                                 }
1789
1790                                 if ((info->native_size == sizeof(double)) &&
1791                                     (info->num_fields  == 1) &&
1792                                     (info->fields[0].field->type->type == MONO_TYPE_R8)) {
1793                                         cinfo->args[nParm].size = sizeof(double);
1794                                         add_float(&fr, sz, cinfo->args+nParm);
1795                                         nParm ++;
1796                                         break;
1797                                 }
1798                         }
1799
1800                         cinfo->args[nParm].vtsize  = 0;
1801                         cinfo->args[nParm].size    = 0;
1802
1803                         switch (size) {
1804                                 /*----------------------------------*/
1805                                 /* On S/390, structures of size 1,  */
1806                                 /* 2, 4, and 8 bytes are passed in  */
1807                                 /* (a) register(s).                 */
1808                                 /*----------------------------------*/
1809                                 case 0:
1810                                 case 1:
1811                                 case 2:
1812                                 case 4:
1813                                 case 8:
1814                                         add_general(&gr, sz, cinfo->args+nParm);
1815                                         cinfo->args[nParm].size    = size;
1816                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1817                                         nParm++;
1818                                         sz->local_size            += sizeof(long);
1819                                         break;
1820                                 default:
1821                                         add_stackParm(&gr, sz, cinfo->args+nParm, size);
1822                                         nParm++;
1823                         }
1824                 }
1825                         break;
1826                 case MONO_TYPE_TYPEDBYREF: {
1827                         int size = sizeof (MonoTypedRef);
1828
1829                         cinfo->args[nParm].vtsize  = 0;
1830                         cinfo->args[nParm].size    = 0;
1831
1832                         switch (size) {
1833                                 /*----------------------------------*/
1834                                 /* On S/390, structures of size 1,  */
1835                                 /* 2, 4, and 8 bytes are passed in  */
1836                                 /* (a) register(s).                 */
1837                                 /*----------------------------------*/
1838                                 case 0:
1839                                 case 1:
1840                                 case 2:
1841                                 case 4:
1842                                 case 8:
1843                                         add_general(&gr, sz, cinfo->args+nParm);
1844                                         cinfo->args[nParm].size    = size;
1845                                         cinfo->args[nParm].regtype = RegTypeStructByVal;
1846                                         nParm++;
1847                                         sz->local_size            += sizeof(long);
1848                                         break;
1849                                 default:
1850                                         add_stackParm(&gr, sz, cinfo->args+nParm, size);
1851                                         nParm++;
1852                         }
1853                 }
1854                         break;
1855                 default:
1856                         g_error ("Can't trampoline 0x%x", ptype);
1857                 }
1858         }
1859
1860         /*----------------------------------------------------------*/
1861         /* Handle the case where there are no implicit arguments    */
1862         /*----------------------------------------------------------*/
1863         if ((sig->call_convention == MONO_CALL_VARARG) &&
1864             (nParm > 0) &&
1865             (!sig->pinvoke) &&
1866             (sig->param_count == sig->sentinelpos)) {
1867                 gr = S390_LAST_ARG_REG + 1;
1868                 fr = S390_LAST_FPARG_REG + 1;
1869                 add_general (&gr, sz, &cinfo->sigCookie);
1870         }
1871
1872         /*----------------------------------------------------------*/
1873         /* If we are passing a structure back then if it won't be   */
1874         /* in a register(s) then we make room at the end of the     */
1875         /* parameters that may have been placed on the stack        */
1876         /*----------------------------------------------------------*/
1877         if (cinfo->struct_ret) {
1878                 cinfo->ret.offset = sz->stack_size;
1879                 switch (cinfo->ret.size) {
1880                 case 0:
1881                 case 1:
1882                 case 2:
1883                 case 4:
1884                 case 8:
1885                         break;
1886                 default:
1887                         sz->stack_size   += S390_ALIGN(cinfo->ret.size, align);
1888                 }
1889         }
1890
1891         cinfo->lastgr   = gr;
1892         sz->stack_size  = sz->stack_size + sz->local_size + sz->parm_size +
1893                           sz->offset;
1894         sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
1895
1896         return (cinfo);
1897 }
1898
1899 /*========================= End of Function ========================*/
1900
1901 /*------------------------------------------------------------------*/
1902 /*                                                                  */
1903 /* Name         - mono_arch_allocate_vars                           */
1904 /*                                                                  */
1905 /* Function     - Set var information according to the calling      */
1906 /*                convention for S/390. The local var stuff should  */
1907 /*                most likely be split in another method.           */
1908 /*                                                                  */
1909 /* Parameter    - @m - Compile unit.                                */
1910 /*                                                                  */
1911 /*------------------------------------------------------------------*/
1912
1913 void
1914 mono_arch_allocate_vars (MonoCompile *cfg)
1915 {
1916         MonoMethodSignature *sig;
1917         MonoMethodHeader *header;
1918         MonoInst *inst;
1919         CallInfo *cinfo;
1920         int iParm, iVar, offset, align, size, curinst;
1921         int frame_reg = STK_BASE;
1922         int sArg, eArg;
1923
1924         header  = cfg->header;
1925
1926         cfg->flags |= MONO_CFG_HAS_SPILLUP;
1927
1928         /*---------------------------------------------------------*/
1929         /* We use the frame register also for any method that has  */
1930         /* filter clauses. This way, when the handlers are called, */
1931         /* the code will reference local variables using the frame */
1932         /* reg instead of the stack pointer: if we had to restore  */
1933         /* the stack pointer, we'd corrupt the method frames that  */
1934         /* are already on the stack (since filters get called      */
1935         /* before stack unwinding happens) when the filter code    */
1936         /* would call any method.                                  */
1937         /*---------------------------------------------------------*/
1938         if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
1939                 frame_reg = s390_r11;
1940
1941         cfg->frame_reg = frame_reg;
1942
1943         cfg->arch.bkchain_reg = -1;
1944
1945         if (frame_reg != STK_BASE)
1946                 cfg->used_int_regs |= 1 << frame_reg;
1947
1948         sig     = mono_method_signature (cfg->method);
1949
1950         cinfo   = get_call_info (cfg, cfg->mempool, sig);
1951
1952         if (!cinfo->struct_ret) {
1953                 switch (mini_type_get_underlying_type (cfg->generic_sharing_context, sig->ret)->type) {
1954                 case MONO_TYPE_VOID:
1955                         break;
1956                 default:
1957                         cfg->ret->opcode = OP_REGVAR;
1958                         cfg->ret->dreg   = s390_r2;
1959                         break;
1960                 }
1961         }
1962
1963         /*--------------------------------------------------------------*/
1964         /* local vars are at a positive offset from the stack pointer   */
1965         /* also note that if the function uses alloca, we use s390_r11  */
1966         /* to point at the local variables.                             */
1967         /* add parameter area size for called functions                 */
1968         /*--------------------------------------------------------------*/
1969         if (cfg->param_area == 0)
1970                 offset = S390_MINIMAL_STACK_SIZE;
1971         else
1972                 offset = cfg->param_area;
1973
1974         cfg->sig_cookie = 0;
1975
1976         if (cinfo->struct_ret) {
1977                 inst               = cfg->vret_addr;
1978                 offset             = S390_ALIGN(offset, sizeof(gpointer));
1979                 inst->inst_offset  = offset;
1980                 inst->opcode       = OP_REGOFFSET;
1981                 inst->inst_basereg = frame_reg;
1982                 offset            += sizeof(gpointer);
1983                 if (G_UNLIKELY (cfg->verbose_level > 1)) {
1984                         printf ("vret_addr =");
1985                         mono_print_ins (cfg->vret_addr);
1986                 }
1987         }
1988
1989         if (sig->hasthis) {
1990                 inst = cfg->args [0];
1991                 if (inst->opcode != OP_REGVAR) {
1992                         inst->opcode       = OP_REGOFFSET;
1993                         inst->inst_basereg = frame_reg;
1994                         offset             = S390_ALIGN(offset, sizeof(gpointer));
1995                         inst->inst_offset  = offset;
1996                         offset            += sizeof (gpointer);
1997                 }
1998                 curinst = sArg = 1;
1999         } else {
2000                 curinst = sArg = 0;
2001         }
2002
2003         eArg = sig->param_count + sArg;
2004
2005         if (sig->call_convention == MONO_CALL_VARARG)
2006                 cfg->sig_cookie += S390_MINIMAL_STACK_SIZE;
2007
2008         for (iParm = sArg; iParm < eArg; ++iParm) {
2009                 inst = cfg->args [curinst];
2010                 if (inst->opcode != OP_REGVAR) {
2011                         switch (cinfo->args[iParm].regtype) {
2012                         case RegTypeStructByAddr : {
2013                                 MonoInst *indir;
2014
2015                                 size = sizeof (gpointer);
2016
2017                                 inst->opcode       = OP_REGOFFSET;
2018                                 inst->inst_basereg = frame_reg;
2019                                 offset             = S390_ALIGN (offset, sizeof (gpointer));
2020                                 inst->inst_offset  = offset;
2021
2022                                 /* Add a level of indirection */
2023                                 MONO_INST_NEW (cfg, indir, 0);
2024                                 *indir          = *inst;
2025                                 inst->opcode    = OP_VTARG_ADDR;
2026                                 inst->inst_left = indir;
2027                         }
2028                                 break;
2029                         case RegTypeStructByAddrOnStack : {
2030                                 MonoInst *indir;
2031
2032                                 size = sizeof (gpointer);
2033
2034                                 /* Similar to the == STK_BASE case below */
2035                                 cfg->arch.bkchain_reg = s390_r12;
2036                                 cfg->used_int_regs |= 1 << cfg->arch.bkchain_reg;
2037
2038                                 inst->opcode = OP_REGOFFSET;
2039                                 inst->dreg = mono_alloc_preg (cfg);
2040                                 inst->inst_basereg = cfg->arch.bkchain_reg;
2041                                 inst->inst_offset = cinfo->args [iParm].offset;
2042
2043                                 /* Add a level of indirection */
2044                                 MONO_INST_NEW (cfg, indir, 0);
2045                                 *indir = *inst;
2046                                 inst->opcode = OP_VTARG_ADDR;
2047                                 inst->inst_left = indir;
2048                                 break;
2049                         }
2050                         case RegTypeStructByVal :
2051                                 size               = cinfo->args[iParm].size;
2052                                 offset             = S390_ALIGN(offset, size);
2053                                 inst->opcode       = OP_REGOFFSET;
2054                                 inst->inst_basereg = frame_reg;
2055                                 inst->inst_offset  = offset;
2056                                 break;
2057                         default :
2058                                 if (cinfo->args [iParm].reg == STK_BASE) {
2059                                         /*
2060                                          * These arguments are in the previous frame, so we can't
2061                                          * compute their offset from the current frame pointer right
2062                                          * now, since cfg->stack_offset is not yet known, so dedicate a
2063                                          * register holding the previous frame pointer.
2064                                          */
2065                                         cfg->arch.bkchain_reg = s390_r12;
2066                                         cfg->used_int_regs |= 1 << cfg->arch.bkchain_reg;
2067
2068                                         inst->opcode       = OP_REGOFFSET;
2069                                         inst->inst_basereg = cfg->arch.bkchain_reg;
2070                                         size               = (cinfo->args[iParm].size < 8
2071                                                                           ? 8 - cinfo->args[iParm].size
2072                                                                           : 0);
2073                                         inst->inst_offset  = cinfo->args [iParm].offset + size;
2074                                         size = sizeof (long);
2075                                 } else {
2076                                         inst->opcode       = OP_REGOFFSET;
2077                                         inst->inst_basereg = frame_reg;
2078                                         size               = (cinfo->args[iParm].size < 8
2079                                                                           ? sizeof(int)
2080                                                                           : sizeof(long));
2081                                         offset             = S390_ALIGN(offset, size);
2082                                         if (cfg->method->wrapper_type == MONO_WRAPPER_MANAGED_TO_NATIVE)
2083                                                 inst->inst_offset  = offset;
2084                                         else
2085                                                 inst->inst_offset  = offset + (8 - size);
2086                                 }
2087                                 break;
2088                         }
2089 #if 0
2090                         if ((sig->call_convention == MONO_CALL_VARARG) &&
2091                             (cinfo->args[iParm].regtype != RegTypeGeneral) &&
2092                             (iParm < sig->sentinelpos))
2093                                 cfg->sig_cookie += size;
2094 printf("%s %4d cookine %x\n",__FUNCTION__,__LINE__,cfg->sig_cookie);
2095 #endif
2096
2097                         offset += MAX(size, 8);
2098                 }
2099                 curinst++;
2100         }
2101
2102         cfg->locals_min_stack_offset = offset;
2103
2104         curinst = cfg->locals_start;
2105         for (iVar = curinst; iVar < cfg->num_varinfo; ++iVar) {
2106                 inst = cfg->varinfo [iVar];
2107                 if ((inst->flags & MONO_INST_IS_DEAD) ||
2108                     (inst->opcode == OP_REGVAR))
2109                         continue;
2110
2111                 /*--------------------------------------------------*/
2112                 /* inst->backend.is_pinvoke indicates native sized  */
2113                 /* value typs this is used by the pinvoke wrappers  */
2114                 /* when they call functions returning structure     */
2115                 /*--------------------------------------------------*/
2116                 if (inst->backend.is_pinvoke && MONO_TYPE_ISSTRUCT (inst->inst_vtype))
2117                         size = mono_class_native_size (mono_class_from_mono_type(inst->inst_vtype),
2118                                                        (guint32 *) &align);
2119                 else
2120                         size = mono_type_size (inst->inst_vtype, &align);
2121
2122                 offset             = S390_ALIGN(offset, align);
2123                 inst->inst_offset  = offset;
2124                 inst->opcode       = OP_REGOFFSET;
2125                 inst->inst_basereg = frame_reg;
2126                 offset            += size;
2127                 DEBUG (g_print("allocating local %d to %ld, size: %d\n",
2128                                 iVar, inst->inst_offset, size));
2129         }
2130
2131         cfg->locals_max_stack_offset = offset;
2132
2133         /*------------------------------------------------------*/
2134         /* Allow space for the trace method stack area if needed*/
2135         /*------------------------------------------------------*/
2136         if ((mono_jit_trace_calls != NULL && mono_trace_eval (cfg->method))
2137             || (cfg->prof_options & MONO_PROFILE_ENTER_LEAVE))
2138                 offset += S390_TRACE_STACK_SIZE;
2139
2140         /*------------------------------------------------------*/
2141         /* Reserve space to save LMF and caller saved registers */
2142         /*------------------------------------------------------*/
2143         if (cfg->method->save_lmf)
2144                 offset += sizeof (MonoLMF);
2145
2146         /*------------------------------------------------------*/
2147         /* align the offset                                     */
2148         /*------------------------------------------------------*/
2149         cfg->stack_offset = S390_ALIGN(offset, S390_STACK_ALIGNMENT);
2150
2151         /*------------------------------------------------------*/
2152         /* Fix offsets for args whose value is in parent frame  */
2153         /*------------------------------------------------------*/
2154         for (iParm = sArg; iParm < eArg; ++iParm) {
2155                 inst = cfg->args [iParm];
2156
2157                 if (inst->opcode == OP_S390_STKARG) {
2158                         inst->opcode = OP_REGOFFSET;
2159                         inst->inst_offset += cfg->stack_offset;
2160                 }
2161         }
2162 }
2163
2164 /*========================= End of Function ========================*/
2165
2166 /*------------------------------------------------------------------*/
2167 /*                                                                  */
2168 /* Name         - mono_arch_create_vars                             */
2169 /*                                                                  */
2170 /*------------------------------------------------------------------*/
2171
2172 void
2173 mono_arch_create_vars (MonoCompile *cfg)
2174 {
2175         MonoMethodSignature *sig;
2176         CallInfo *cinfo;
2177
2178         sig = mono_method_signature (cfg->method);
2179
2180         cinfo = get_call_info (cfg, cfg->mempool, sig);
2181
2182         if (cinfo->struct_ret) {
2183                 cfg->vret_addr = mono_compile_create_var (cfg, &mono_defaults.int_class->byval_arg, OP_ARG);
2184                 if (G_UNLIKELY (cfg->verbose_level > 1)) {
2185                         printf ("vret_addr = ");
2186                         mono_print_ins (cfg->vret_addr);
2187                 }
2188         }
2189 }
2190
2191 /*========================= End of Function ========================*/
2192
2193 /*------------------------------------------------------------------*/
2194 /*                                                                  */
2195 /* Name         - add_outarg_reg2.                                  */
2196 /*                                                                  */
2197 /*------------------------------------------------------------------*/
2198
2199 static void
2200 add_outarg_reg2 (MonoCompile *cfg, MonoCallInst *call, ArgStorage storage, int reg, MonoInst *tree)
2201 {
2202         MonoInst *ins;
2203
2204         switch (storage) {
2205         case RegTypeGeneral:
2206                 MONO_INST_NEW (cfg, ins, OP_MOVE);
2207                 ins->dreg = mono_alloc_ireg (cfg);
2208                 ins->sreg1 = tree->dreg;
2209                 MONO_ADD_INS (cfg->cbb, ins);
2210                 mono_call_inst_add_outarg_reg (cfg, call, ins->dreg, reg, FALSE);
2211                 break;
2212         case RegTypeFP:
2213                 MONO_INST_NEW (cfg, ins, OP_FMOVE);
2214                 ins->dreg = mono_alloc_freg (cfg);
2215                 ins->sreg1 = tree->dreg;
2216                 MONO_ADD_INS (cfg->cbb, ins);
2217                 mono_call_inst_add_outarg_reg (cfg, call, ins->dreg, reg, TRUE);
2218                 break;
2219         case RegTypeFPR4:
2220                 MONO_INST_NEW (cfg, ins, OP_S390_SETF4RET);
2221                 ins->dreg = mono_alloc_freg (cfg);
2222                 ins->sreg1 = tree->dreg;
2223                 MONO_ADD_INS (cfg->cbb, ins);
2224                 mono_call_inst_add_outarg_reg (cfg, call, ins->dreg, reg, TRUE);
2225                 break;
2226         default:
2227                 g_assert_not_reached ();
2228         }
2229 }
2230
2231 /*========================= End of Function ========================*/
2232
2233 /*------------------------------------------------------------------*/
2234 /*                                                                  */
2235 /* Name         - emit_sig_cookie.                                  */
2236 /*                                                                  */
2237 /*------------------------------------------------------------------*/
2238
2239 static void
2240 emit_sig_cookie (MonoCompile *cfg, MonoCallInst *call, CallInfo *cinfo)
2241 {
2242         MonoMethodSignature *tmpSig;
2243         MonoInst *sig_arg;
2244
2245         cfg->disable_aot = TRUE;
2246
2247         /*----------------------------------------------------------*/
2248         /* mono_ArgIterator_Setup assumes the signature cookie is   */
2249         /* passed first and all the arguments which were before it  */
2250         /* passed on the stack after the signature. So compensate   */
2251         /* by passing a different signature.                        */
2252         /*----------------------------------------------------------*/
2253         tmpSig = mono_metadata_signature_dup (call->signature);
2254         tmpSig->param_count -= call->signature->sentinelpos;
2255         tmpSig->sentinelpos  = 0;
2256         if (tmpSig->param_count > 0)
2257                 memcpy (tmpSig->params,
2258                         call->signature->params + call->signature->sentinelpos,
2259                         tmpSig->param_count * sizeof(MonoType *));
2260
2261         MONO_INST_NEW (cfg, sig_arg, OP_ICONST);
2262         sig_arg->dreg = mono_alloc_ireg (cfg);
2263         sig_arg->inst_p0 = tmpSig;
2264         MONO_ADD_INS (cfg->cbb, sig_arg);
2265
2266         MONO_EMIT_NEW_STORE_MEMBASE (cfg, OP_STORE_MEMBASE_REG, STK_BASE,
2267                                      cinfo->sigCookie.offset, sig_arg->dreg);
2268 }
2269
2270 /*========================= End of Function ========================*/
2271
2272 /*------------------------------------------------------------------*/
2273 /*                                                                  */
2274 /* Name         - mono_arch_emit_call                               */
2275 /*                                                                  */
2276 /*------------------------------------------------------------------*/
2277
2278 void
2279 mono_arch_emit_call (MonoCompile *cfg, MonoCallInst *call)
2280 {
2281         MonoInst *in;
2282         MonoMethodSignature *sig;
2283         MonoInst *ins;
2284         int i, n, lParamArea;
2285         CallInfo *cinfo;
2286         ArgInfo *ainfo = NULL;
2287         int stackSize;
2288         MonoMethodHeader *header;
2289         int frmReg;
2290
2291         sig = call->signature;
2292         n = sig->param_count + sig->hasthis;
2293         DEBUG (g_print ("Call requires: %d parameters\n",n));
2294
2295         cinfo = get_call_info (cfg, cfg->mempool, sig);
2296
2297         stackSize         = cinfo->sz.stack_size + cinfo->sz.local_size +
2298                             cinfo->sz.parm_size + cinfo->sz.offset;
2299         call->stack_usage = MAX(stackSize, call->stack_usage);
2300         lParamArea        = MAX((call->stack_usage-S390_MINIMAL_STACK_SIZE-cinfo->sz.parm_size), 0);
2301         cfg->param_area   = MAX(((signed) cfg->param_area), lParamArea);
2302         cfg->flags       |= MONO_CFG_HAS_CALLS;
2303
2304         if (cinfo->struct_ret) {
2305                 MONO_INST_NEW (cfg, ins, OP_MOVE);
2306                 ins->sreg1 = call->vret_var->dreg;
2307                 ins->dreg = mono_alloc_preg (cfg);
2308                 MONO_ADD_INS (cfg->cbb, ins);
2309                 mono_call_inst_add_outarg_reg (cfg, call, ins->dreg, cinfo->ret.reg, FALSE);
2310         }
2311
2312         header = cfg->header;
2313         if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
2314                 frmReg = s390_r11;
2315         else
2316                 frmReg = STK_BASE;
2317
2318         for (i = 0; i < n; ++i) {
2319                 MonoType *t;
2320
2321                 ainfo = cinfo->args + i;
2322                 if (i >= sig->hasthis)
2323                         t = sig->params [i - sig->hasthis];
2324                 else
2325                         t = &mono_defaults.int_class->byval_arg;
2326                 t = mini_type_get_underlying_type (cfg->generic_sharing_context, t);
2327
2328                 in = call->args [i];
2329
2330                 if ((sig->call_convention == MONO_CALL_VARARG) &&
2331                     (!sig->pinvoke) &&
2332                     (i == sig->sentinelpos)) {
2333                         emit_sig_cookie (cfg, call, cinfo);
2334                 }
2335
2336                 switch (ainfo->regtype) {
2337                 case RegTypeGeneral:
2338                         add_outarg_reg2 (cfg, call, ainfo->regtype, ainfo->reg, in);
2339                         break;
2340                 case RegTypeFP:
2341                         if (MONO_TYPE_ISSTRUCT (t)) {
2342                                 /* Valuetype passed in one fp register */
2343                                 ainfo->regtype = RegTypeStructByValInFP;
2344                                 /* Fall through */
2345                         } else {
2346                                 if (ainfo->size == 4)
2347                                         ainfo->regtype = RegTypeFPR4;
2348                                 add_outarg_reg2 (cfg, call, ainfo->regtype, ainfo->reg, in);
2349                                 break;
2350                         }
2351                 case RegTypeStructByVal:
2352                 case RegTypeStructByAddr:
2353                 case RegTypeStructByAddrOnStack: {
2354                         guint32 align;
2355                         guint32 size;
2356
2357                         if (sig->params [i - sig->hasthis]->type == MONO_TYPE_TYPEDBYREF) {
2358                                 size = sizeof (MonoTypedRef);
2359                                 align = sizeof (gpointer);
2360                         }
2361                         else
2362                                 if (sig->pinvoke)
2363                                         size = mono_type_native_stack_size (&in->klass->byval_arg, &align);
2364                                 else {
2365                                         /*
2366                                          * Other backends use mono_type_stack_size (), but that
2367                                          * aligns the size to 8, which is larger than the size of
2368                                          * the source, leading to reads of invalid memory if the
2369                                          * source is at the end of address space.
2370                                          */
2371                                         size = mono_class_value_size (in->klass, &align);
2372                                 }
2373
2374                         g_assert (in->klass);
2375
2376                         ainfo->offparm += cinfo->sz.offStruct;
2377
2378                         MONO_INST_NEW (cfg, ins, OP_OUTARG_VT);
2379                         ins->sreg1 = in->dreg;
2380                         ins->klass = in->klass;
2381                         ins->backend.size = ainfo->size;
2382                         ins->inst_p0 = call;
2383                         ins->inst_p1 = mono_mempool_alloc (cfg->mempool, sizeof (ArgInfo));
2384                         memcpy (ins->inst_p1, ainfo, sizeof (ArgInfo));
2385
2386                         MONO_ADD_INS (cfg->cbb, ins);
2387
2388                         if (ainfo->regtype == RegTypeStructByAddr) {
2389                                 /*
2390                                  * We use OP_OUTARG_VT to copy the valuetype to a stack location, then
2391                                  * use the normal OUTARG opcodes to pass the address of the location to
2392                                  * the callee.
2393                                  */
2394                                 int treg = mono_alloc_preg (cfg);
2395                                 MONO_EMIT_NEW_BIALU_IMM (cfg, OP_ADD_IMM, treg,
2396                                                          frmReg, ainfo->offparm);
2397                                 mono_call_inst_add_outarg_reg (cfg, call, treg, ainfo->reg, FALSE);
2398                         } else if (ainfo->regtype == RegTypeStructByAddrOnStack) {
2399                                 /* The address of the valuetype is passed on the stack */
2400                                 int treg = mono_alloc_preg (cfg);
2401                                 MONO_EMIT_NEW_BIALU_IMM (cfg, OP_ADD_IMM, treg,
2402                                                          frmReg, ainfo->offparm);
2403                                 MONO_EMIT_NEW_STORE_MEMBASE (cfg, OP_STORE_MEMBASE_REG,
2404                                                              ainfo->reg, ainfo->offset, treg);
2405
2406                                 if (cfg->compute_gc_maps) {
2407                                         MonoInst *def;
2408
2409                                         EMIT_NEW_GC_PARAM_SLOT_LIVENESS_DEF (cfg, def, ainfo->offset, t);
2410                                 }
2411                         }
2412                         break;
2413                 }
2414                 case RegTypeBase:
2415                         if (!t->byref && t->type == MONO_TYPE_R4) {
2416                                 MONO_EMIT_NEW_STORE_MEMBASE (cfg, OP_STORER4_MEMBASE_REG,
2417                                                              STK_BASE, ainfo->offset + 4,
2418                                                              in->dreg);
2419                         } else if (!t->byref && (t->type == MONO_TYPE_R8)) {
2420                                 MONO_EMIT_NEW_STORE_MEMBASE (cfg, OP_STORER8_MEMBASE_REG,
2421                                                              STK_BASE, ainfo->offset,
2422                                                              in->dreg);
2423                         } else {
2424                                 MONO_INST_NEW (cfg, ins, OP_STORE_MEMBASE_REG);
2425                                 ins->inst_destbasereg = STK_BASE;
2426                                 ins->inst_offset = ainfo->offset;
2427                                 ins->sreg1 = in->dreg;
2428
2429 #if 0
2430                                 /* This is needed by MonoTypedRef->value to point to the correct data */
2431                                 if ((sig->call_convention == MONO_CALL_VARARG) &&
2432                                         (i >= sig->sentinelpos)) {
2433                                         switch (ainfo->size) {
2434                                         case 1:
2435                                                 ins->opcode = OP_STOREI1_MEMBASE_REG;
2436                                                 break;
2437                                         case 2:
2438                                                 ins->opcode = OP_STOREI2_MEMBASE_REG;
2439                                                 break;
2440                                         case 4:
2441                                                 ins->opcode = OP_STOREI4_MEMBASE_REG;
2442                                                 break;
2443                                         default:
2444                                                 break;
2445                                         }
2446                                 }
2447 #endif
2448
2449                                 MONO_ADD_INS (cfg->cbb, ins);
2450                         }
2451                         break;
2452                 default:
2453                         g_assert_not_reached ();
2454                         break;
2455                 }
2456         }
2457
2458         /*
2459          * Handle the case where there are no implicit arguments
2460          */
2461         if ((sig->call_convention == MONO_CALL_VARARG) &&
2462             (!sig->pinvoke) &&
2463             (i == sig->sentinelpos)) {
2464                 emit_sig_cookie (cfg, call, cinfo);
2465         }
2466 }
2467
2468 /*========================= End of Function ========================*/
2469
2470 /*------------------------------------------------------------------*/
2471 /*                                                                  */
2472 /* Name         - mono_arch_emit_outarg_vt                          */
2473 /*                                                                  */
2474 /*------------------------------------------------------------------*/
2475
2476 void
2477 mono_arch_emit_outarg_vt (MonoCompile *cfg, MonoInst *ins, MonoInst *src)
2478 {
2479         MonoCallInst *call = (MonoCallInst*)ins->inst_p0;
2480         ArgInfo *ainfo = (ArgInfo*)ins->inst_p1;
2481         int size = ins->backend.size;
2482
2483         if (ainfo->regtype == RegTypeStructByVal) {
2484                 /*
2485                                 arg->ins.sreg1  = ainfo->reg;
2486                                 arg->ins.opcode = OP_OUTARG_VT;
2487                                 arg->size       = ainfo->size;
2488                                 arg->offset     = ainfo->offset;
2489                                 arg->offPrm     = ainfo->offparm + cinfo->sz.offStruct;
2490                 */
2491                 if (ainfo->reg != STK_BASE) {
2492                         MONO_OUTPUT_VTR (cfg, size, ainfo->reg, src->dreg, 0);
2493                 } else {
2494                         MONO_OUTPUT_VTS (cfg, size, ainfo->reg, ainfo->offset,
2495                                                           src->dreg, 0);
2496                 }
2497         } else if (ainfo->regtype == RegTypeStructByValInFP) {
2498                 int dreg = mono_alloc_freg (cfg);
2499
2500                 if (ainfo->size == 4) {
2501                         MONO_EMIT_NEW_LOAD_MEMBASE_OP (cfg, OP_LOADR4_MEMBASE, dreg, src->dreg, 0);
2502                         MONO_EMIT_NEW_UNALU (cfg, OP_S390_SETF4RET, dreg, dreg);
2503                 } else {
2504                         g_assert (ainfo->size == 8);
2505
2506                         MONO_EMIT_NEW_LOAD_MEMBASE_OP (cfg, OP_LOADR8_MEMBASE, dreg, src->dreg, 0);
2507                 }
2508
2509                 mono_call_inst_add_outarg_reg (cfg, call, dreg, ainfo->reg, TRUE);
2510         } else {
2511                 MonoMethodHeader *header;
2512                 int srcReg;
2513
2514                 header = mono_method_get_header (cfg->method);
2515                 if ((cfg->flags & MONO_CFG_HAS_ALLOCA) || header->num_clauses)
2516                         srcReg = s390_r11;
2517                 else
2518                         srcReg = STK_BASE;
2519
2520                 MONO_EMIT_NEW_MOVE (cfg, srcReg, ainfo->offparm,
2521                                                          src->dreg, 0, size);
2522
2523                 if (cfg->compute_gc_maps) {
2524                         MonoInst *def;
2525
2526                         EMIT_NEW_GC_PARAM_SLOT_LIVENESS_DEF (cfg, def, ainfo->offset, &ins->klass->byval_arg);
2527                 }
2528         }
2529 }
2530
2531 /*========================= End of Function ========================*/
2532
2533 /*------------------------------------------------------------------*/
2534 /*                                                                  */
2535 /* Name         - mono_arch_emit_setret                             */
2536 /*                                                                  */
2537 /*------------------------------------------------------------------*/
2538
2539 void
2540 mono_arch_emit_setret (MonoCompile *cfg, MonoMethod *method, MonoInst *val)
2541 {
2542         MonoType *ret = mini_type_get_underlying_type (cfg->generic_sharing_context,
2543                                 mono_method_signature (method)->ret);
2544
2545         if (!ret->byref) {
2546                 if (ret->type == MONO_TYPE_R4) {
2547                         MONO_EMIT_NEW_UNALU (cfg, OP_S390_SETF4RET, s390_f0, val->dreg);
2548                         return;
2549                 } else if (ret->type == MONO_TYPE_R8) {
2550                         MONO_EMIT_NEW_UNALU (cfg, OP_FMOVE, s390_f0, val->dreg);
2551                         return;
2552                 }
2553         }
2554
2555         MONO_EMIT_NEW_UNALU (cfg, OP_MOVE, cfg->ret->dreg, val->dreg);
2556 }
2557
2558 /*========================= End of Function ========================*/
2559
2560 /*------------------------------------------------------------------*/
2561 /*                                                                  */
2562 /* Name         - mono_arch_instrument_mem_needs                    */
2563 /*                                                                  */
2564 /* Function     - Allow tracing to work with this interface (with   */
2565 /*                an optional argument).                            */
2566 /*                                                                  */
2567 /*------------------------------------------------------------------*/
2568
2569 void
2570 mono_arch_instrument_mem_needs (MonoMethod *method, int *stack, int *code)
2571 {
2572         /* no stack room needed now (may be needed for FASTCALL-trace support) */
2573         *stack = 0;
2574         /* split prolog-epilog requirements? */
2575         *code = 50; /* max bytes needed: check this number */
2576 }
2577
2578 /*========================= End of Function ========================*/
2579
2580 /*------------------------------------------------------------------*/
2581 /*                                                                  */
2582 /* Name         - mono_arch_instrument_prolog                       */
2583 /*                                                                  */
2584 /* Function     - Create an "instrumented" prolog.                  */
2585 /*                                                                  */
2586 /*------------------------------------------------------------------*/
2587
2588 void*
2589 mono_arch_instrument_prolog (MonoCompile *cfg, void *func, void *p,
2590                              gboolean enable_arguments)
2591 {
2592         guchar  *code = p;
2593         int     parmOffset,
2594                 fpOffset,
2595                 baseReg;
2596
2597         parmOffset = cfg->stack_usage - S390_TRACE_STACK_SIZE;
2598         if (cfg->method->save_lmf)
2599                 parmOffset -= sizeof(MonoLMF);
2600         fpOffset   = parmOffset + (5*sizeof(gpointer));
2601         baseReg = STK_BASE;
2602
2603         s390_stmg (code, s390_r2, s390_r6, STK_BASE, parmOffset);
2604         s390_stdy (code, s390_f0, 0, STK_BASE, fpOffset);
2605         s390_stdy (code, s390_f2, 0, STK_BASE, fpOffset+sizeof(gdouble));
2606         s390_stdy (code, s390_f4, 0, STK_BASE, fpOffset+2*sizeof(gdouble));
2607         s390_stdy (code, s390_f6, 0, STK_BASE, fpOffset+3*sizeof(gdouble));
2608         S390_SET  (code, s390_r1, func);
2609         S390_SET  (code, s390_r2, cfg->method);
2610         s390_lay  (code, s390_r3, 0, STK_BASE, parmOffset);
2611         s390_lgr  (code, s390_r4, STK_BASE);
2612         s390_aghi (code, s390_r4, cfg->stack_usage);
2613         s390_basr (code, s390_r14, s390_r1);
2614         s390_ldy  (code, s390_f6, 0, STK_BASE, fpOffset+3*sizeof(gdouble));
2615         s390_ldy  (code, s390_f4, 0, STK_BASE, fpOffset+2*sizeof(gdouble));
2616         s390_ldy  (code, s390_f2, 0, STK_BASE, fpOffset+sizeof(gdouble));
2617         s390_ldy  (code, s390_f0, 0, STK_BASE, fpOffset);
2618         s390_lmg  (code, s390_r2, s390_r6, STK_BASE, parmOffset);
2619
2620         return code;
2621 }
2622
2623 /*========================= End of Function ========================*/
2624
2625 /*------------------------------------------------------------------*/
2626 /*                                                                  */
2627 /* Name         - mono_arch_instrument_epilog                       */
2628 /*                                                                  */
2629 /* Function     - Create an epilog that will handle the returned    */
2630 /*                values used in instrumentation.                   */
2631 /*                                                                  */
2632 /*------------------------------------------------------------------*/
2633
2634 void*
2635 mono_arch_instrument_epilog_full (MonoCompile *cfg, void *func, void *p, gboolean enable_arguments, gboolean preserve_argument_registers)
2636 {
2637         guchar     *code = p;
2638         int        save_mode = SAVE_NONE,
2639                    saveOffset,
2640                    offset;
2641         MonoMethod *method = cfg->method;
2642         int rtype = mini_type_get_underlying_type (cfg->generic_sharing_context,
2643                         mono_method_signature (method)->ret)->type;
2644
2645         offset = code - cfg->native_code;
2646         /*-----------------------------------------*/
2647         /* We need about 128 bytes of instructions */
2648         /*-----------------------------------------*/
2649         if (offset > (cfg->code_size - 128)) {
2650                 cfg->code_size *= 2;
2651                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
2652                 code = cfg->native_code + offset;
2653         }
2654
2655         saveOffset = cfg->stack_usage - S390_TRACE_STACK_SIZE;
2656         if (method->save_lmf)
2657                 saveOffset -= sizeof(MonoLMF);
2658
2659 handle_enum:
2660         switch (rtype) {
2661         case MONO_TYPE_VOID:
2662                 /* special case string .ctor icall */
2663                 if (strcmp (".ctor", method->name) && method->klass == mono_defaults.string_class)
2664                         save_mode = SAVE_ONE;
2665                 else
2666                         save_mode = SAVE_NONE;
2667                 break;
2668         case MONO_TYPE_I8:
2669         case MONO_TYPE_U8:
2670                 save_mode = SAVE_ONE;
2671                 break;
2672         case MONO_TYPE_R4:
2673                 save_mode = SAVE_R4;
2674                 break;
2675         case MONO_TYPE_R8:
2676                 save_mode = SAVE_R8;
2677                 break;
2678         case MONO_TYPE_VALUETYPE:
2679                 if (mono_method_signature (method)->ret->data.klass->enumtype) {
2680                         rtype = mono_class_enum_basetype (mono_method_signature (method)->ret->data.klass)->type;
2681                         goto handle_enum;
2682                 }
2683                 save_mode = SAVE_STRUCT;
2684                 break;
2685         default:
2686                 save_mode = SAVE_ONE;
2687                 break;
2688         }
2689
2690         switch (save_mode) {
2691         case SAVE_ONE:
2692                 s390_stg (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2693                 if (enable_arguments) {
2694                         s390_lgr (code, s390_r3, s390_r2);
2695                 }
2696                 break;
2697         case SAVE_R4:
2698                 s390_std (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2699                 if (enable_arguments) {
2700                         s390_ldebr (code, s390_f0, s390_f0);
2701                 }
2702                 break;
2703         case SAVE_R8:
2704                 s390_std (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2705                 break;
2706         case SAVE_STRUCT:
2707                 s390_stg (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2708                 if (enable_arguments) {
2709                         s390_lg (code, s390_r3, 0, cfg->frame_reg,
2710                                  S390_MINIMAL_STACK_SIZE+cfg->param_area);
2711                 }
2712                 break;
2713         case SAVE_NONE:
2714         default:
2715                 break;
2716         }
2717
2718         S390_SET  (code, s390_r1, func);
2719         S390_SET  (code, s390_r2, cfg->method);
2720         s390_basr (code, s390_r14, s390_r1);
2721
2722         switch (save_mode) {
2723         case SAVE_ONE:
2724                 s390_lg  (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2725                 break;
2726         case SAVE_R4:
2727         case SAVE_R8:
2728                 s390_ld  (code, s390_f0, 0, cfg->frame_reg, saveOffset);
2729                 break;
2730         case SAVE_STRUCT:
2731                 s390_lg  (code, s390_r2, 0, cfg->frame_reg, saveOffset);
2732                 break;
2733         case SAVE_NONE:
2734         default:
2735                 break;
2736         }
2737
2738         return code;
2739 }
2740
2741 /*========================= End of Function ========================*/
2742
2743 /*------------------------------------------------------------------*/
2744 /*                                                                  */
2745 /* Name         - mono_arch_peephole_pass_1                         */
2746 /*                                                                  */
2747 /* Function     - Form a peephole pass at the code looking for      */
2748 /*                simple optimizations.                             */
2749 /*                                                                  */
2750 /*------------------------------------------------------------------*/
2751
2752 void
2753 mono_arch_peephole_pass_1 (MonoCompile *cfg, MonoBasicBlock *bb)
2754 {
2755 }
2756
2757 /*========================= End of Function ========================*/
2758
2759 /*------------------------------------------------------------------*/
2760 /*                                                                  */
2761 /* Name         - mono_arch_peephole_pass_2                         */
2762 /*                                                                  */
2763 /* Function     - Form a peephole pass at the code looking for      */
2764 /*                simple optimizations.                             */
2765 /*                                                                  */
2766 /*------------------------------------------------------------------*/
2767
2768 void
2769 mono_arch_peephole_pass_2 (MonoCompile *cfg, MonoBasicBlock *bb)
2770 {
2771         MonoInst *ins, *n;
2772
2773         MONO_BB_FOR_EACH_INS_SAFE (bb, n, ins) {
2774                 mono_peephole_ins (bb, ins);
2775         }
2776 }
2777
2778 /*========================= End of Function ========================*/
2779
2780 /*------------------------------------------------------------------*/
2781 /*                                                                  */
2782 /* Name         - mono_arch_lowering_pass.                          */
2783 /*                                                                  */
2784 /*------------------------------------------------------------------*/
2785
2786 void
2787 mono_arch_lowering_pass (MonoCompile *cfg, MonoBasicBlock *bb)
2788 {
2789         MonoInst *ins, *next;
2790
2791         MONO_BB_FOR_EACH_INS_SAFE (bb, next, ins) {
2792                 switch (ins->opcode) {
2793                 case OP_DIV_IMM:
2794                 case OP_REM_IMM:
2795                 case OP_IDIV_IMM:
2796                 case OP_IREM_IMM:
2797                 case OP_IDIV_UN_IMM:
2798                 case OP_IREM_UN_IMM:
2799                 case OP_LAND_IMM:
2800                 case OP_LOR_IMM:
2801                 case OP_LXOR_IMM:
2802                 case OP_LOCALLOC_IMM:
2803                         mono_decompose_op_imm (cfg, bb, ins);
2804                         break;
2805                 case OP_LADD_IMM:
2806                         if (!s390_is_imm16 (ins->inst_imm))
2807                                 /* This is created by the memcpy code which ignores is_inst_imm */
2808                                 mono_decompose_op_imm (cfg, bb, ins);
2809                         break;
2810                 default:
2811                         break;
2812                 }
2813         }
2814
2815         bb->max_vreg = cfg->next_vreg;
2816 }
2817
2818 /*========================= End of Function ========================*/
2819
2820 /*------------------------------------------------------------------*/
2821 /*                                                                  */
2822 /* Name         - emit_float_to_int                                 */
2823 /*                                                                  */
2824 /* Function     - Create instructions which will convert a floating */
2825 /*                point value to integer.                           */
2826 /*                                                                  */
2827 /*------------------------------------------------------------------*/
2828
2829 static guchar*
2830 emit_float_to_int (MonoCompile *cfg, guchar *code, int dreg, int sreg, int size, gboolean is_signed)
2831 {
2832         /* sreg is a float, dreg is an integer reg. */
2833         if (is_signed) {
2834                 s390_cgdbr (code, dreg, 5, sreg);
2835                 switch (size) {
2836                         case 1:
2837                                 s390_lghi (code, s390_r0, 0);
2838                                 s390_lghi (code, s390_r13, 0xff);
2839                                 s390_ltgr (code, dreg, dreg);
2840                                 s390_jnl  (code, 4);
2841                                 s390_lghi (code, s390_r0, 0x80);
2842                                 s390_ngr  (code, dreg, s390_r13);
2843                                 s390_ogr  (code, dreg, s390_r0);
2844                                 break;
2845                 }
2846         } else {
2847                 short *o[1];
2848                 S390_SET    (code, s390_r13, 0x41e0000000000000llu);
2849                 s390_ldgr   (code, s390_f14, s390_r13);
2850                 s390_ldr    (code, s390_f15, sreg);
2851                 s390_cdbr   (code, s390_f15, s390_f14);
2852                 s390_jl     (code, 0); CODEPTR (code, o[0]);
2853                 S390_SET    (code, s390_r13, 0x41f0000000000000llu);
2854                 s390_ldgr   (code, s390_f14, s390_r13);
2855                 s390_sdbr   (code, s390_f15, s390_f14);
2856                 s390_cfdbr  (code, dreg, 7, s390_f15);
2857                 s390_j      (code, 4);
2858                 PTRSLOT (code, o[0]);
2859                 s390_cfdbr  (code, dreg, 5, sreg);
2860                 switch (size) {
2861                         case 1:
2862                                 s390_lghi (code, s390_r0, 0xff);
2863                                 s390_ngr  (code, dreg, s390_r0);
2864                                 break;
2865                         case 2:
2866                                 s390_lghi (code, s390_r0, -1);
2867                                 s390_srlg (code, s390_r0, s390_r0, 0, 16);
2868                                 s390_ngr  (code, dreg, s390_r0);
2869                                 break;
2870                 }
2871         }
2872         return code;
2873 }
2874
2875 /*========================= End of Function ========================*/
2876
2877 /*------------------------------------------------------------------*/
2878 /*                                                                  */
2879 /* Name         - gboolean_is_unsigned.                             */
2880 /*                                                                  */
2881 /* Function     - Return TRUE if next opcode is checking for un-    */
2882 /*                signed value.                                     */
2883 /*                                                                  */
2884 /*------------------------------------------------------------------*/
2885
2886 static
2887 gboolean is_unsigned (MonoInst *next)
2888 {
2889         if ((next) &&
2890                 (((next->opcode >= OP_IBNE_UN) &&
2891                   (next->opcode <= OP_IBLT_UN)) ||
2892                  ((next->opcode >= OP_LBNE_UN) &&
2893                   (next->opcode <= OP_LBLT_UN)) ||
2894                  ((next->opcode >= OP_COND_EXC_NE_UN) &&
2895                   (next->opcode <= OP_COND_EXC_LT_UN)) ||
2896                  ((next->opcode >= OP_COND_EXC_INE_UN) &&
2897                   (next->opcode <= OP_COND_EXC_ILT_UN)) ||
2898                  ((next->opcode == OP_CLT_UN) ||
2899                   (next->opcode == OP_CGT_UN)) ||
2900                  ((next->opcode == OP_ICLT_UN) ||
2901                   (next->opcode == OP_ICGT_UN) ||
2902                   (next->opcode == OP_LCLT_UN) ||
2903                   (next->opcode == OP_LCGT_UN))))
2904                 return TRUE;
2905         else
2906                 return FALSE;
2907 }
2908
2909 /*========================= End of Function ========================*/
2910
2911 /*------------------------------------------------------------------*/
2912 /*                                                                  */
2913 /* Name         - mono_arch_output_basic_block                      */
2914 /*                                                                  */
2915 /* Function     - Perform the "real" work of emitting instructions  */
2916 /*                that will do the work of in the basic block.      */
2917 /*                                                                  */
2918 /*------------------------------------------------------------------*/
2919
2920 void
2921 mono_arch_output_basic_block (MonoCompile *cfg, MonoBasicBlock *bb)
2922 {
2923         MonoInst *ins;
2924         MonoCallInst *call;
2925         guint offset;
2926         guint8 *code = cfg->native_code + cfg->code_len;
2927         guint last_offset = 0;
2928         int max_len, cpos, src2;
2929
2930         /* we don't align basic blocks of loops on s390 */
2931
2932         if (cfg->verbose_level > 2)
2933                 g_print ("Basic block %d starting at offset 0x%x\n", bb->block_num, bb->native_offset);
2934
2935         cpos = bb->max_offset;
2936
2937         if (cfg->prof_options & MONO_PROFILE_COVERAGE) {
2938                 //MonoCoverageInfo *cov = mono_get_coverage_info (cfg->method);
2939                 //g_assert (!mono_compile_aot);
2940                 //cpos += 6;
2941                 //if (bb->cil_code)
2942                 //      cov->data [bb->dfn].iloffset = bb->cil_code - cfg->cil_code;
2943                 /* this is not thread save, but good enough */
2944                 /* fixme: howto handle overflows? */
2945                 //x86_inc_mem (code, &cov->data [bb->dfn].count);
2946         }
2947
2948         MONO_BB_FOR_EACH_INS (bb, ins) {
2949                 offset = code - cfg->native_code;
2950
2951                 max_len = ((guint8 *)ins_get_spec (ins->opcode))[MONO_INST_LEN];
2952
2953                 if (offset > (cfg->code_size - max_len - 16)) {
2954                         cfg->code_size *= 2;
2955                         cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
2956                         code = cfg->native_code + offset;
2957                 }
2958
2959                 mono_debug_record_line_number (cfg, ins, offset);
2960
2961                 switch (ins->opcode) {
2962                 case OP_STOREI1_MEMBASE_IMM: {
2963                         s390_lghi (code, s390_r0, ins->inst_imm);
2964                         S390_LONG (code, stcy, stc, s390_r0, 0,
2965                                    ins->inst_destbasereg, ins->inst_offset);
2966                 }
2967                         break;
2968                 case OP_STOREI2_MEMBASE_IMM: {
2969                         s390_lghi (code, s390_r0, ins->inst_imm);
2970                         S390_LONG (code, sthy, sth, s390_r0, 0,
2971                                    ins->inst_destbasereg, ins->inst_offset);
2972                 }
2973                         break;
2974                 case OP_STOREI4_MEMBASE_IMM: {
2975                         s390_lgfi (code, s390_r0, ins->inst_imm);
2976                         S390_LONG (code, sty, st, s390_r0, 0,
2977                                    ins->inst_destbasereg, ins->inst_offset);
2978                 }
2979                         break;
2980                 case OP_STORE_MEMBASE_IMM:
2981                 case OP_STOREI8_MEMBASE_IMM: {
2982                         S390_SET (code, s390_r0, ins->inst_imm);
2983                         S390_LONG (code, stg, stg, s390_r0, 0,
2984                                    ins->inst_destbasereg, ins->inst_offset);
2985                 }
2986                         break;
2987                 case OP_STOREI1_MEMBASE_REG: {
2988                         S390_LONG (code, stcy, stc, ins->sreg1, 0,
2989                                    ins->inst_destbasereg, ins->inst_offset);
2990                 }
2991                         break;
2992                 case OP_STOREI2_MEMBASE_REG: {
2993                         S390_LONG (code, sthy, sth, ins->sreg1, 0,
2994                                    ins->inst_destbasereg, ins->inst_offset);
2995                 }
2996                         break;
2997                 case OP_STOREI4_MEMBASE_REG: {
2998                         S390_LONG (code, sty, st, ins->sreg1, 0,
2999                                    ins->inst_destbasereg, ins->inst_offset);
3000                 }
3001                         break;
3002                 case OP_STORE_MEMBASE_REG:
3003                 case OP_STOREI8_MEMBASE_REG: {
3004                         S390_LONG (code, stg, stg, ins->sreg1, 0,
3005                                    ins->inst_destbasereg, ins->inst_offset);
3006                 }
3007                         break;
3008                 case OP_LOADU4_MEM:
3009                         g_assert_not_reached ();
3010                         break;
3011                 case OP_LOAD_MEMBASE:
3012                 case OP_LOADI8_MEMBASE: {
3013                         S390_LONG (code, lg, lg, ins->dreg, 0,
3014                                    ins->inst_basereg, ins->inst_offset);
3015                 }
3016                         break;
3017                 case OP_LOADI4_MEMBASE: {
3018                         S390_LONG (code, lgf, lgf, ins->dreg, 0,
3019                                    ins->inst_basereg, ins->inst_offset);
3020                 }
3021                         break;
3022                 case OP_LOADU4_MEMBASE: {
3023                         S390_LONG (code, llgf, llgf, ins->dreg, 0,
3024                                    ins->inst_basereg, ins->inst_offset);
3025                 }
3026                         break;
3027                 case OP_LOADU1_MEMBASE: {
3028                         S390_LONG (code, llgc, llgc, ins->dreg, 0,
3029                                    ins->inst_basereg, ins->inst_offset);
3030                 }
3031                         break;
3032                 case OP_LOADI1_MEMBASE: {
3033                         S390_LONG (code, lgb, lgb, ins->dreg, 0,
3034                                    ins->inst_basereg, ins->inst_offset);
3035                 }
3036                         break;
3037                 case OP_LOADU2_MEMBASE: {
3038                         S390_LONG (code, llgh, llgh, ins->dreg, 0,
3039                                    ins->inst_basereg, ins->inst_offset);
3040                 }
3041                         break;
3042                 case OP_LOADI2_MEMBASE: {
3043                         S390_LONG (code, lgh, lgh, ins->dreg, 0,
3044                                    ins->inst_basereg, ins->inst_offset);
3045                 }
3046                         break;
3047                 case OP_LCONV_TO_I1: {
3048                         s390_lgbr (code, ins->dreg, ins->sreg1);
3049                 }
3050                         break;
3051                 case OP_LCONV_TO_I2: {
3052                         s390_lghr (code, ins->dreg, ins->sreg1);
3053                 }
3054                         break;
3055                 case OP_LCONV_TO_U1: {
3056                         s390_llgcr (code, ins->dreg, ins->sreg1);
3057                 }
3058                         break;
3059                 case OP_LCONV_TO_U2: {
3060                         s390_llghr (code, ins->dreg, ins->sreg1);
3061                 }
3062                         break;
3063                 case OP_ICONV_TO_I1: {
3064                         s390_lgbr  (code, ins->dreg, ins->sreg1);
3065                 }
3066                         break;
3067                 case OP_ICONV_TO_I2: {
3068                         s390_lghr  (code, ins->dreg, ins->sreg1);
3069                 }
3070                         break;
3071                 case OP_ICONV_TO_U1: {
3072                         s390_llgcr (code, ins->dreg, ins->sreg1);
3073                 }
3074                         break;
3075                 case OP_ICONV_TO_U2: {
3076                         s390_llghr (code, ins->dreg, ins->sreg1);
3077                 }
3078                         break;
3079                 case OP_COMPARE:
3080                 case OP_LCOMPARE: {
3081                         if (is_unsigned (ins->next))
3082                                 s390_clgr (code, ins->sreg1, ins->sreg2);
3083                         else
3084                                 s390_cgr  (code, ins->sreg1, ins->sreg2);
3085                 }
3086                         break;
3087                 case OP_ICOMPARE: {
3088                         if (is_unsigned (ins->next))
3089                                 s390_clr  (code, ins->sreg1, ins->sreg2);
3090                         else
3091                                 s390_cr   (code, ins->sreg1, ins->sreg2);
3092                 }
3093                         break;
3094                 case OP_COMPARE_IMM:
3095                 case OP_LCOMPARE_IMM: {
3096                         S390_SET (code, s390_r0, ins->inst_imm);
3097                         if (is_unsigned (ins->next))
3098                                 s390_clgr (code, ins->sreg1, s390_r0);
3099                         else
3100                                 s390_cgr  (code, ins->sreg1, s390_r0);
3101                 }
3102                         break;
3103                 case OP_ICOMPARE_IMM: {
3104                         S390_SET (code, s390_r0, ins->inst_imm);
3105                         if (is_unsigned (ins->next))
3106                                 s390_clr  (code, ins->sreg1, s390_r0);
3107                         else
3108                                 s390_cr   (code, ins->sreg1, s390_r0);
3109                 }
3110                         break;
3111                 case OP_BREAK: {
3112                         mono_add_patch_info (cfg, code - cfg->native_code, MONO_PATCH_INFO_ABS,
3113                                              mono_break);
3114                         S390_CALL_TEMPLATE (code, s390_r14);
3115                 }
3116                         break;
3117                 case OP_ADDCC: {
3118                         CHECK_SRCDST_COM;
3119                         s390_agr  (code, ins->dreg, src2);
3120                 }
3121                         break;
3122                 case OP_LADD: {
3123                         CHECK_SRCDST_COM;
3124                         s390_agr   (code, ins->dreg, src2);
3125                 }
3126                         break;
3127                 case OP_ADC: {
3128                         CHECK_SRCDST_COM;
3129                         s390_alcgr (code, ins->dreg, src2);
3130                 }
3131                         break;
3132                 case OP_ADD_IMM: {
3133                         if (ins->dreg != ins->sreg1) {
3134                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3135                         }
3136                         if (s390_is_imm16 (ins->inst_imm)) {
3137                                 s390_aghi (code, ins->dreg, ins->inst_imm);
3138                         } else if (s390_is_imm32 (ins->inst_imm)) {
3139                                 s390_agfi (code, ins->dreg, ins->inst_imm);
3140                         } else {
3141                                 S390_SET  (code, s390_r0, ins->inst_imm);
3142                                 s390_agr  (code, ins->dreg, s390_r0);
3143                         }
3144                 }
3145                         break;
3146                 case OP_LADD_IMM: {
3147                         if (ins->dreg != ins->sreg1) {
3148                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3149                         }
3150                         g_assert (s390_is_imm16 (ins->inst_imm));
3151                         s390_aghi (code, ins->dreg, ins->inst_imm);
3152                 }
3153                         break;
3154                 case OP_ADC_IMM: {
3155                         if (ins->dreg != ins->sreg1) {
3156                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3157                         }
3158                         if (s390_is_imm16 (ins->inst_imm)) {
3159                                 s390_lghi  (code, s390_r0, ins->inst_imm);
3160                                 s390_alcgr (code, ins->dreg, s390_r0);
3161                         } else {
3162                                 S390_SET   (code, s390_r0, ins->inst_imm);
3163                                 s390_alcgr (code, ins->dreg, s390_r0);
3164                         }
3165                 }
3166                         break;
3167                 case OP_IADD_OVF:
3168                 case OP_S390_IADD_OVF: {
3169                         CHECK_SRCDST_COM;
3170                         s390_ar    (code, ins->dreg, src2);
3171                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3172                         s390_lgfr  (code, ins->dreg, ins->dreg);
3173                 }
3174                         break;
3175                 case OP_IADD_OVF_UN:
3176                 case OP_S390_IADD_OVF_UN: {
3177                         CHECK_SRCDST_COM;
3178                         s390_algr  (code, ins->dreg, src2);
3179                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
3180                         s390_llgfr (code, ins->dreg, ins->dreg);
3181                 }
3182                         break;
3183                 case OP_ADD_OVF_CARRY: {
3184                         CHECK_SRCDST_COM;
3185                         s390_lghi  (code, s390_r0, 0);
3186                         s390_lgr   (code, s390_r1, s390_r0);
3187                         s390_alcgr (code, s390_r0, s390_r1);
3188                         s390_agr   (code, ins->dreg, src2);
3189                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3190                         s390_agr   (code, ins->dreg, s390_r0);
3191                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3192                 }
3193                         break;
3194                 case OP_ADD_OVF_UN_CARRY: {
3195                         CHECK_SRCDST_COM;
3196                         s390_alcgr (code, ins->dreg, src2);
3197                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
3198                 }
3199                         break;
3200                 case OP_SUBCC: {
3201                         CHECK_SRCDST_NCOM;
3202                         s390_sgr (code, ins->dreg, src2);
3203                 }
3204                         break;
3205                 case OP_LSUB: {
3206                         CHECK_SRCDST_NCOM;
3207                         s390_sgr  (code, ins->dreg, src2);
3208                 }
3209                         break;
3210                 case OP_SBB: {
3211                         CHECK_SRCDST_NCOM;
3212                         s390_slbgr(code, ins->dreg, src2);
3213                 }
3214                         break;
3215                 case OP_SUB_IMM: {
3216                         if (ins->dreg != ins->sreg1) {
3217                                 s390_lgr   (code, ins->dreg, ins->sreg1);
3218                         }
3219                         if (s390_is_imm16 (-ins->inst_imm)) {
3220                                 s390_aghi  (code, ins->dreg, -ins->inst_imm);
3221                         } else if (s390_is_imm32 (-ins->inst_imm)) {
3222                                 s390_slgfi  (code, ins->dreg, ins->inst_imm);
3223                         } else {
3224                                 S390_SET  (code, s390_r0, ins->inst_imm);
3225                                 s390_slgr (code, ins->dreg, s390_r0);
3226                         }
3227                 }
3228                         break;
3229                 case OP_LSUB_IMM: {
3230                         if (ins->dreg != ins->sreg1) {
3231                                 s390_lgr   (code, ins->dreg, ins->sreg1);
3232                         }
3233                         if (s390_is_imm16 (-ins->inst_imm)) {
3234                                 s390_aghi  (code, ins->dreg, -ins->inst_imm);
3235                         } else if (s390_is_imm32 (-ins->inst_imm)) {
3236                                 s390_slgfi (code, ins->dreg, ins->inst_imm);
3237                         } else {
3238                                 S390_SET  (code, s390_r0, ins->inst_imm);
3239                                 s390_slgr (code, ins->dreg, s390_r0);
3240                         }
3241                 }
3242                         break;
3243                 case OP_SBB_IMM: {
3244                         if (ins->dreg != ins->sreg1) {
3245                                 s390_lgr   (code, ins->dreg, ins->sreg1);
3246                         }
3247                         if (s390_is_imm16 (-ins->inst_imm)) {
3248                                 s390_lghi  (code, s390_r0, ins->inst_imm);
3249                                 s390_slbgr (code, ins->dreg, s390_r0);
3250                         } else {
3251                                 S390_SET  (code, s390_r0, ins->inst_imm);
3252                                 s390_slbgr(code, ins->dreg, s390_r0);
3253                         }
3254                 }
3255                         break;
3256                 case OP_SUB_OVF_CARRY: {
3257                         CHECK_SRCDST_NCOM;
3258                         s390_lghi  (code, s390_r0, 0);
3259                         s390_lgr   (code, s390_r1, s390_r0);
3260                         s390_slbgr (code, s390_r0, s390_r1);
3261                         s390_sgr   (code, ins->dreg, src2);
3262                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3263                         s390_agr   (code, ins->dreg, s390_r0);
3264                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3265                 }
3266                         break;
3267                 case OP_SUB_OVF_UN_CARRY: {
3268                         CHECK_SRCDST_NCOM;
3269                         s390_slbgr (code, ins->dreg, src2);
3270                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
3271                 }
3272                         break;
3273                 case OP_LAND: {
3274                         if (ins->sreg1 == ins->dreg) {
3275                                 s390_ngr  (code, ins->dreg, ins->sreg2);
3276                         }
3277                         else {
3278                                 if (ins->sreg2 == ins->dreg) {
3279                                         s390_ngr (code, ins->dreg, ins->sreg1);
3280                                 }
3281                                 else {
3282                                         s390_lgr (code, ins->dreg, ins->sreg1);
3283                                         s390_ngr (code, ins->dreg, ins->sreg2);
3284                                 }
3285                         }
3286                 }
3287                         break;
3288                 case OP_AND_IMM: {
3289                         if (ins->dreg != ins->sreg1) {
3290                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3291                         }
3292                         S390_SET_MASK (code, s390_r0, ins->inst_imm);
3293                         s390_ngr (code, ins->dreg, s390_r0);
3294                 }
3295                         break;
3296                 case OP_LDIV: {
3297                         s390_lgr  (code, s390_r1, ins->sreg1);
3298                         s390_dsgr (code, s390_r0, ins->sreg2);
3299                         s390_lgr  (code, ins->dreg, s390_r1);
3300                 }
3301                         break;
3302                 case OP_LDIV_UN: {
3303                         s390_lgr   (code, s390_r1, ins->sreg1);
3304                         s390_lghi  (code, s390_r0, 0);
3305                         s390_dlgr  (code, s390_r0, ins->sreg2);
3306                         s390_lgr   (code, ins->dreg, s390_r1);
3307                 }
3308                         break;
3309                 case OP_LREM: {
3310                         s390_lgr  (code, s390_r1, ins->sreg1);
3311                         s390_dsgr (code, s390_r0, ins->sreg2);
3312                         s390_lgr  (code, ins->dreg, s390_r0);
3313                         break;
3314                 }
3315                 case OP_LREM_UN: {
3316                         s390_lgr   (code, s390_r1, ins->sreg1);
3317                         s390_lghi  (code, s390_r0, 0);
3318                         s390_dlgr  (code, s390_r0, ins->sreg2);
3319                         s390_lgr   (code, ins->dreg, s390_r0);
3320                 }
3321                         break;
3322                 case OP_LOR: {
3323                         if (ins->sreg1 == ins->dreg) {
3324                                 s390_ogr  (code, ins->dreg, ins->sreg2);
3325                         }
3326                         else {
3327                                 if (ins->sreg2 == ins->dreg) {
3328                                         s390_ogr (code, ins->dreg, ins->sreg1);
3329                                 }
3330                                 else {
3331                                         s390_lgr (code, ins->dreg, ins->sreg1);
3332                                         s390_ogr (code, ins->dreg, ins->sreg2);
3333                                 }
3334                         }
3335                 }
3336                         break;
3337                 case OP_OR_IMM: {
3338                         if (ins->dreg != ins->sreg1) {
3339                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3340                         }
3341                         S390_SET_MASK(code, s390_r0, ins->inst_imm);
3342                         s390_ogr (code, ins->dreg, s390_r0);
3343                 }
3344                         break;
3345                 case OP_LXOR: {
3346                         if (ins->sreg1 == ins->dreg) {
3347                                 s390_xgr  (code, ins->dreg, ins->sreg2);
3348                         }
3349                         else {
3350                                 if (ins->sreg2 == ins->dreg) {
3351                                         s390_xgr (code, ins->dreg, ins->sreg1);
3352                                 }
3353                                 else {
3354                                         s390_lgr (code, ins->dreg, ins->sreg1);
3355                                         s390_xgr (code, ins->dreg, ins->sreg2);
3356                                 }
3357                         }
3358                 }
3359                         break;
3360                 case OP_XOR_IMM: {
3361                         if (ins->dreg != ins->sreg1) {
3362                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3363                         }
3364                         S390_SET_MASK (code, s390_r0, ins->inst_imm);
3365                         s390_xgr (code, ins->dreg, s390_r0);
3366                 }
3367                         break;
3368                 case OP_LSHL: {
3369                         CHECK_SRCDST_NCOM;
3370                         s390_sllg (code, ins->dreg, ins->dreg, src2, 0);
3371                 }
3372                         break;
3373                 case OP_SHL_IMM:
3374                 case OP_LSHL_IMM: {
3375                         if (ins->sreg1 != ins->dreg) {
3376                                 s390_lgr   (code, ins->dreg, ins->sreg1);
3377                         }
3378                         s390_sllg (code, ins->dreg, ins->dreg, 0, (ins->inst_imm & 0x3f));
3379                 }
3380                         break;
3381                 case OP_LSHR: {
3382                         CHECK_SRCDST_NCOM;
3383                         s390_srag  (code, ins->dreg, ins->dreg, src2, 0);
3384                 }
3385                         break;
3386                 case OP_SHR_IMM:
3387                 case OP_LSHR_IMM: {
3388                         if (ins->sreg1 != ins->dreg) {
3389                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3390                         }
3391                         s390_srag  (code, ins->dreg, ins->dreg, 0, (ins->inst_imm & 0x3f));
3392                 }
3393                         break;
3394                 case OP_SHR_UN_IMM:
3395                 case OP_LSHR_UN_IMM: {
3396                         if (ins->sreg1 != ins->dreg) {
3397                                 s390_lgr   (code, ins->dreg, ins->sreg1);
3398                         }
3399                         s390_srlg (code, ins->dreg, ins->dreg, 0, (ins->inst_imm & 0x3f));
3400                 }
3401                         break;
3402                 case OP_LSHR_UN: {
3403                         CHECK_SRCDST_NCOM;
3404                         s390_srlg (code, ins->dreg, ins->dreg, src2, 0);
3405                 }
3406                         break;
3407                 case OP_LNOT: {
3408                         if (ins->sreg1 != ins->dreg) {
3409                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3410                         }
3411                         s390_lghi (code, s390_r0, -1);
3412                         s390_xgr  (code, ins->dreg, s390_r0);
3413                 }
3414                         break;
3415                 case OP_LNEG: {
3416                         s390_lcgr (code, ins->dreg, ins->sreg1);
3417                 }
3418                         break;
3419                 case OP_LMUL: {
3420                         CHECK_SRCDST_COM;
3421                         s390_msgr (code, ins->dreg, src2);
3422                 }
3423                         break;
3424                 case OP_MUL_IMM:
3425                 case OP_LMUL_IMM: {
3426                         if (ins->dreg != ins->sreg1) {
3427                                 s390_lgr  (code, ins->dreg, ins->sreg1);
3428                         }
3429                         if (s390_is_imm16 (ins->inst_imm)) {
3430                                 s390_lghi (code, s390_r13, ins->inst_imm);
3431                         } else if (s390_is_imm32 (ins->inst_imm)) {
3432                                 s390_lgfi (code, s390_r13, ins->inst_imm);
3433                         } else {
3434                                 S390_SET (code, s390_r13, ins->inst_imm);
3435                         }
3436                         s390_msgr (code, ins->dreg, s390_r13);
3437                 }
3438                         break;
3439                 case OP_LMUL_OVF: {
3440                         short int *o[2];
3441                         s390_ltgr (code, s390_r1, ins->sreg1);
3442                         s390_jz   (code, 0); CODEPTR(code, o[0]);
3443                         s390_ltgr (code, s390_r0, ins->sreg2);
3444                         s390_jnz  (code, 6);
3445                         s390_lghi (code, s390_r1, 0);
3446                         s390_j    (code, 0); CODEPTR(code, o[1]);
3447                         s390_xgr  (code, s390_r0, s390_r1);
3448                         s390_msgr (code, s390_r1, ins->sreg2);
3449                         s390_xgr  (code, s390_r0, s390_r1);
3450                         s390_srlg (code, s390_r0, s390_r0, 0, 63);
3451                         s390_ltgr (code, s390_r0, s390_r0);
3452                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3453                         PTRSLOT   (code, o[0]);
3454                         PTRSLOT   (code, o[1]);
3455                         s390_lgr  (code, ins->dreg, s390_r1);
3456                 }
3457                         break;
3458                 case OP_LMUL_OVF_UN: {
3459                         s390_lghi  (code, s390_r0, 0);
3460                         s390_lgr   (code, s390_r1, ins->sreg1);
3461                         s390_mlgr  (code, s390_r0, ins->sreg2);
3462                         s390_ltgr  (code, s390_r0, s390_r0);
3463                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3464                         s390_lgr   (code, ins->dreg, s390_r1);
3465                 }
3466                         break;
3467                 case OP_IADDCC: {
3468                         g_assert_not_reached ();
3469                         CHECK_SRCDST_COM_I;
3470                         s390_algr (code, ins->dreg, src2);
3471                 }
3472                         break;
3473                 case OP_IADD: {
3474                         CHECK_SRCDST_COM_I;
3475                         s390_agr  (code, ins->dreg, src2);
3476                 }
3477                         break;
3478                 case OP_IADC: {
3479                         g_assert_not_reached ();
3480                         CHECK_SRCDST_COM_I;
3481                         s390_alcgr (code, ins->dreg, src2);
3482                 }
3483                         break;
3484                 case OP_IADD_IMM: {
3485                         if (ins->dreg != ins->sreg1) {
3486                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3487                         }
3488                         if (s390_is_imm16 (ins->inst_imm)) {
3489                                 s390_aghi (code, ins->dreg, ins->inst_imm);
3490                         } else {
3491                                 s390_afi  (code, ins->dreg, ins->inst_imm);
3492                         }
3493                 }
3494                         break;
3495                 case OP_IADC_IMM: {
3496                         if (ins->dreg != ins->sreg1) {
3497                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3498                         }
3499                         if (s390_is_imm16 (ins->inst_imm)) {
3500                                 s390_lghi  (code, s390_r0, ins->inst_imm);
3501                                 s390_alcgr (code, ins->dreg, s390_r0);
3502                         } else {
3503                                 S390_SET   (code, s390_r0, ins->inst_imm);
3504                                 s390_alcgr (code, ins->dreg, s390_r0);
3505                         }
3506                 }
3507                         break;
3508                 case OP_LADD_OVF:
3509                 case OP_S390_LADD_OVF: {
3510                         CHECK_SRCDST_COM;
3511                         s390_agr    (code, ins->dreg, src2);
3512                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3513                 }
3514                         break;
3515                 case OP_LADD_OVF_UN:
3516                 case OP_S390_LADD_OVF_UN: {
3517                         CHECK_SRCDST_COM;
3518                         s390_algr  (code, ins->dreg, src2);
3519                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
3520                 }
3521                         break;
3522                 case OP_ISUBCC: {
3523                         CHECK_SRCDST_NCOM_I;
3524                         s390_slgr (code, ins->dreg, src2);
3525                 }
3526                         break;
3527                 case OP_ISUB: {
3528                         CHECK_SRCDST_NCOM_I;
3529                         s390_sgr  (code, ins->dreg, src2);
3530                 }
3531                         break;
3532                 case OP_ISBB: {
3533                         CHECK_SRCDST_NCOM_I;
3534                         s390_slbgr (code, ins->dreg, src2);
3535                 }
3536                         break;
3537                 case OP_ISUB_IMM: {
3538                         if (ins->dreg != ins->sreg1) {
3539                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3540                         }
3541                         if (s390_is_imm16 (-ins->inst_imm)) {
3542                                 s390_aghi (code, ins->dreg, -ins->inst_imm);
3543                         } else {
3544                                 s390_agfi (code, ins->dreg, -ins->inst_imm);
3545                         }
3546                 }
3547                         break;
3548                 case OP_ISBB_IMM: {
3549                         S390_SET (code, s390_r0, ins->inst_imm);
3550                         s390_slgfr (code, ins->dreg, s390_r0);
3551                 }
3552                         break;
3553                 case OP_ISUB_OVF:
3554                 case OP_S390_ISUB_OVF: {
3555                         CHECK_SRCDST_NCOM;
3556                         s390_sr   (code, ins->dreg, src2);
3557                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3558                         s390_lgfr (code, ins->dreg, ins->dreg);
3559                 }
3560                         break;
3561                 case OP_ISUB_OVF_UN:
3562                 case OP_S390_ISUB_OVF_UN: {
3563                         CHECK_SRCDST_NCOM;
3564                         s390_slr  (code, ins->dreg, src2);
3565                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
3566                         s390_llgfr(code, ins->dreg, ins->dreg);
3567                 }
3568                         break;
3569                 case OP_LSUB_OVF:
3570                 case OP_S390_LSUB_OVF: {
3571                         CHECK_SRCDST_NCOM;
3572                         s390_sgr   (code, ins->dreg, src2);
3573                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
3574                 }
3575                         break;
3576                 case OP_LSUB_OVF_UN:
3577                 case OP_S390_LSUB_OVF_UN: {
3578                         CHECK_SRCDST_NCOM;
3579                         s390_slgr  (code, ins->dreg, src2);
3580                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
3581                 }
3582                         break;
3583                 case OP_IAND: {
3584                         CHECK_SRCDST_NCOM_I;
3585                         s390_ngr (code, ins->dreg, src2);
3586                 }
3587                         break;
3588                 case OP_IAND_IMM: {
3589                         if (ins->dreg != ins->sreg1) {
3590                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3591                         }
3592                         S390_SET_MASK (code, s390_r0, ins->inst_imm);
3593                         s390_ngr  (code, ins->dreg, s390_r0);
3594                 }
3595                         break;
3596                 case OP_IDIV: {
3597                         s390_lgfr (code, s390_r0, ins->sreg1);
3598                         s390_srda (code, s390_r0, 0, 32);
3599                         s390_dr   (code, s390_r0, ins->sreg2);
3600                         s390_lgfr (code, ins->dreg, s390_r1);
3601                 }
3602                         break;
3603                 case OP_IDIV_UN: {
3604                         s390_lgfr (code, s390_r0, ins->sreg1);
3605                         s390_srdl (code, s390_r0, 0, 32);
3606                         s390_dlr  (code, s390_r0, ins->sreg2);
3607                         s390_lgfr (code, ins->dreg, s390_r1);
3608                 }
3609                         break;
3610                 case OP_IDIV_IMM: {
3611                         if (s390_is_imm16 (ins->inst_imm)) {
3612                                 s390_lghi (code, s390_r13, ins->inst_imm);
3613                         } else {
3614                                 s390_lgfi (code, s390_r13, ins->inst_imm);
3615                         }
3616                         s390_lgfr (code, s390_r0, ins->sreg1);
3617                         s390_srda (code, s390_r0, 0, 32);
3618                         s390_dr   (code, s390_r0, ins->sreg2);
3619                         s390_lgfr (code, ins->dreg, s390_r1);
3620                 }
3621                         break;
3622                 case OP_IREM: {
3623                         s390_lgfr (code, s390_r0, ins->sreg1);
3624                         s390_srda (code, s390_r0, 0, 32);
3625                         s390_dr   (code, s390_r0, ins->sreg2);
3626                         s390_lgfr (code, ins->dreg, s390_r0);
3627                         break;
3628                 case OP_IREM_UN:
3629                         s390_lgfr (code, s390_r0, ins->sreg1);
3630                         s390_srdl (code, s390_r0, 0, 32);
3631                         s390_dlr  (code, s390_r0, ins->sreg2);
3632                         s390_lgfr (code, ins->dreg, s390_r0);
3633                 }
3634                         break;
3635                 case OP_IREM_IMM: {
3636                         if (s390_is_imm16 (ins->inst_imm)) {
3637                                 s390_lghi (code, s390_r13, ins->inst_imm);
3638                         } else {
3639                                 s390_lgfi (code, s390_r13, ins->inst_imm);
3640                         }
3641                         s390_lgfr (code, s390_r0, ins->sreg1);
3642                         s390_srda (code, s390_r0, 0, 32);
3643                         s390_dr   (code, s390_r0, ins->sreg2);
3644                         s390_lgfr (code, ins->dreg, s390_r0);
3645                 }
3646                         break;
3647                 case OP_IOR: {
3648                         CHECK_SRCDST_COM_I;
3649                         s390_ogr (code, ins->dreg, src2);
3650                 }
3651                         break;
3652                 case OP_IOR_IMM: {
3653                         if (ins->dreg != ins->sreg1) {
3654                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3655                         }
3656                         S390_SET_MASK (code, s390_r0, ins->inst_imm);
3657                         s390_ogr  (code, ins->dreg, s390_r0);
3658                 }
3659                         break;
3660                 case OP_IXOR: {
3661                         CHECK_SRCDST_COM_I;
3662                         s390_xgr (code, ins->dreg, src2);
3663                 }
3664                         break;
3665                 case OP_IXOR_IMM: {
3666                         if (ins->dreg != ins->sreg1) {
3667                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3668                         }
3669                         S390_SET_MASK (code, s390_r0, ins->inst_imm);
3670                         s390_xgr  (code, ins->dreg, s390_r0);
3671                 }
3672                         break;
3673                 case OP_ISHL: {
3674                         CHECK_SRCDST_NCOM;
3675                         s390_sll  (code, ins->dreg, src2, 0);
3676                 }
3677                         break;
3678                 case OP_ISHL_IMM: {
3679                         if (ins->sreg1 != ins->dreg) {
3680                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3681                         }
3682                         s390_sll (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3683                 }
3684                         break;
3685                 case OP_ISHR: {
3686                         CHECK_SRCDST_NCOM;
3687                         s390_sra (code, ins->dreg, src2, 0);
3688                 }
3689                         break;
3690                 case OP_ISHR_IMM: {
3691                         if (ins->sreg1 != ins->dreg) {
3692                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3693                         }
3694                         s390_sra (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3695                 }
3696                         break;
3697                 case OP_ISHR_UN_IMM: {
3698                         if (ins->sreg1 != ins->dreg) {
3699                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3700                         }
3701                         s390_srl (code, ins->dreg, 0, (ins->inst_imm & 0x1f));
3702                 }
3703                         break;
3704                 case OP_ISHR_UN: {
3705                         CHECK_SRCDST_NCOM;
3706                         s390_srl  (code, ins->dreg, src2, 0);
3707                 }
3708                         break;
3709                 case OP_INOT: {
3710                         if (ins->sreg1 != ins->dreg) {
3711                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3712                         }
3713                         s390_lghi (code, s390_r0, -1);
3714                         s390_xgr  (code, ins->dreg, s390_r0);
3715                 }
3716                         break;
3717                 case OP_INEG: {
3718                         s390_lcgr (code, ins->dreg, ins->sreg1);
3719                 }
3720                         break;
3721                 case OP_IMUL: {
3722                         CHECK_SRCDST_COM_I;
3723                         s390_msr (code, ins->dreg, src2);
3724                 }
3725                         break;
3726                 case OP_IMUL_IMM: {
3727                         if (ins->dreg != ins->sreg1) {
3728                                 s390_lgfr (code, ins->dreg, ins->sreg1);
3729                         }
3730                         if (s390_is_imm16 (ins->inst_imm)) {
3731                                 s390_lghi (code, s390_r0, ins->inst_imm);
3732                         } else {
3733                                 s390_lgfi (code, s390_r0, ins->inst_imm);
3734                         }
3735                         s390_msr  (code, ins->dreg, s390_r0);
3736                 }
3737                         break;
3738                 case OP_IMUL_OVF: {
3739                         short int *o[2];
3740                         s390_ltr  (code, s390_r1, ins->sreg1);
3741                         s390_jz   (code, 0); CODEPTR(code, o[0]);
3742                         s390_ltr  (code, s390_r0, ins->sreg2);
3743                         s390_jnz  (code, 6);
3744                         s390_lhi  (code, s390_r1, 0);
3745                         s390_j    (code, 0); CODEPTR(code, o[1]);
3746                         s390_xr   (code, s390_r0, s390_r1);
3747                         s390_msr  (code, s390_r1, ins->sreg2);
3748                         s390_xr   (code, s390_r0, s390_r1);
3749                         s390_srl  (code, s390_r0, 0, 31);
3750                         s390_ltr  (code, s390_r0, s390_r0);
3751                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3752                         PTRSLOT   (code, o[0]);
3753                         PTRSLOT   (code, o[1]);
3754                         s390_lgfr (code, ins->dreg, s390_r1);
3755                 }
3756                         break;
3757                 case OP_IMUL_OVF_UN: {
3758                         s390_lhi  (code, s390_r0, 0);
3759                         s390_lr   (code, s390_r1, ins->sreg1);
3760                         s390_mlr  (code, s390_r0, ins->sreg2);
3761                         s390_ltr  (code, s390_r0, s390_r0);
3762                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NZ, "OverflowException");
3763                         s390_lgfr (code, ins->dreg, s390_r1);
3764                 }
3765                         break;
3766                 case OP_ICONST:
3767                 case OP_I8CONST: {
3768                         S390_SET (code, ins->dreg, ins->inst_c0);
3769                 }
3770                         break;
3771                 case OP_AOTCONST: {
3772                         mono_add_patch_info (cfg, code - cfg->native_code,
3773                                 (MonoJumpInfoType)ins->inst_i1, ins->inst_p0);
3774                         S390_LOAD_TEMPLATE (code, ins->dreg);
3775                 }
3776                         break;
3777                 case OP_JUMP_TABLE: {
3778                         mono_add_patch_info (cfg, code - cfg->native_code,
3779                                 (MonoJumpInfoType)ins->inst_i1, ins->inst_p0);
3780                         S390_LOAD_TEMPLATE (code, ins->dreg);
3781                 }
3782                         break;
3783                 case OP_MOVE:
3784                         if (ins->dreg != ins->sreg1) {
3785                                 s390_lgr (code, ins->dreg, ins->sreg1);
3786                         }
3787                         break;
3788                 case OP_LCONV_TO_I:
3789                 case OP_LCONV_TO_I8:
3790                 case OP_SEXT_I4:
3791                         s390_lgfr (code, ins->dreg, ins->sreg1);
3792                         break;
3793                 case OP_LCONV_TO_I4:
3794                         s390_lgfr (code, ins->dreg, ins->sreg1);
3795                         break;
3796                 case OP_LCONV_TO_U:
3797                 case OP_LCONV_TO_U8:
3798                 case OP_LCONV_TO_U4:
3799                 case OP_ZEXT_I4:
3800                         s390_llgfr (code, ins->dreg, ins->sreg1);
3801                         break;
3802                 case OP_LCONV_TO_OVF_U4:
3803                         S390_SET  (code, s390_r0, 4294967295);
3804                         s390_clgr (code, ins->sreg1, s390_r0);
3805                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GT, "OverflowException");
3806                         s390_ltgr (code, ins->sreg1, ins->sreg1);
3807                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, "OverflowException");
3808                         s390_llgfr(code, ins->dreg, ins->sreg1);
3809                         break;
3810                 case OP_LCONV_TO_OVF_I4_UN:
3811                         S390_SET  (code, s390_r0, 2147483647);
3812                         s390_cgr  (code, ins->sreg1, s390_r0);
3813                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GT, "OverflowException");
3814                         s390_ltgr (code, ins->sreg1, ins->sreg1);
3815                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, "OverflowException");
3816                         s390_lgfr (code, ins->dreg, ins->sreg1);
3817                         break;
3818                 case OP_FMOVE: {
3819                         if (ins->dreg != ins->sreg1) {
3820                                 s390_ldr   (code, ins->dreg, ins->sreg1);
3821                         }
3822                 }
3823                         break;
3824                 case OP_FCONV_TO_R4: {
3825                         s390_ledbr (code, ins->dreg, ins->sreg1);
3826                         s390_ldebr (code, ins->dreg, ins->dreg);
3827                 }
3828                         break;
3829                 case OP_S390_SETF4RET: {
3830                         s390_ledbr (code, ins->dreg, ins->sreg1);
3831                 }
3832                         break;
3833                 case OP_TLS_GET: {
3834                         if (s390_is_imm16 (ins->inst_offset)) {
3835                                 s390_lghi (code, s390_r13, ins->inst_offset);
3836                         } else if (s390_is_imm32 (ins->inst_offset)) {
3837                                 s390_lgfi (code, s390_r13, ins->inst_offset);
3838                         } else {
3839                                 S390_SET  (code, s390_r13, ins->inst_offset);
3840                         }
3841                         s390_ear (code, s390_r1, 0);
3842                         s390_sllg(code, s390_r1, s390_r1, 0, 32);
3843                         s390_ear (code, s390_r1, 1);
3844                         s390_lg  (code, ins->dreg, s390_r13, s390_r1, 0);
3845                 }
3846                         break;
3847                 case OP_JMP: {
3848                         if (cfg->method->save_lmf)
3849                                 restoreLMF(code, cfg->frame_reg, cfg->stack_usage);
3850
3851                         if (cfg->flags & MONO_CFG_HAS_TAIL) {
3852                                 code =  emit_load_volatile_arguments (code, cfg);
3853                         }
3854
3855                         code = backUpStackPtr(cfg, code);
3856                         s390_lg  (code, s390_r14, 0, cfg->frame_reg, S390_RET_ADDR_OFFSET);
3857                         mono_add_patch_info (cfg, code - cfg->native_code,
3858                                              MONO_PATCH_INFO_METHOD_JUMP,
3859                                              ins->inst_p0);
3860                         s390_jcl (code, S390_CC_UN, 0);
3861                 }
3862                         break;
3863                 case OP_CHECK_THIS: {
3864                         /* ensure ins->sreg1 is not NULL */
3865                         s390_lg   (code, s390_r0, 0, ins->sreg1, 0);
3866                         s390_ltgr (code, s390_r0, s390_r0);
3867 //                      EMIT_COND_SYSTEM_EXCEPTION (S390_CC_ZR, "NullReferenceException");
3868                 }
3869                         break;
3870                 case OP_ARGLIST: {
3871                         int offset = cfg->sig_cookie + cfg->stack_usage;
3872
3873                         if (s390_is_imm16 (offset)) {
3874                                 s390_lghi (code, s390_r0, offset);
3875                         } else if (s390_is_imm32 (offset)) {
3876                                 s390_lgfi (code, s390_r0, offset);
3877                         } else {
3878                                 S390_SET  (code, s390_r0, offset);
3879                         }
3880                         s390_agr  (code, s390_r0, cfg->frame_reg);
3881                         s390_stg  (code, s390_r0, 0, ins->sreg1, 0);
3882                 }
3883                         break;
3884                 case OP_FCALL: {
3885                         call = (MonoCallInst*)ins;
3886                         if (ins->flags & MONO_INST_HAS_METHOD)
3887                                 mono_add_patch_info (cfg, code-cfg->native_code,
3888                                                      MONO_PATCH_INFO_METHOD,
3889                                                      call->method);
3890                         else
3891                                 mono_add_patch_info (cfg, code-cfg->native_code,
3892                                                      MONO_PATCH_INFO_ABS,
3893                                                      call->fptr);
3894                         S390_CALL_TEMPLATE (code, s390_r14);
3895                         if (call->signature->ret->type == MONO_TYPE_R4)
3896                                 s390_ldebr (code, s390_f0, s390_f0);
3897                 }
3898                         break;
3899                 case OP_LCALL:
3900                 case OP_VCALL:
3901                 case OP_VCALL2:
3902                 case OP_VOIDCALL:
3903                 case OP_CALL: {
3904                         call = (MonoCallInst*)ins;
3905                         if (ins->flags & MONO_INST_HAS_METHOD)
3906                                 mono_add_patch_info (cfg, code-cfg->native_code,
3907                                                      MONO_PATCH_INFO_METHOD,
3908                                                      call->method);
3909                         else
3910                                 mono_add_patch_info (cfg, code-cfg->native_code,
3911                                                      MONO_PATCH_INFO_ABS,
3912                                                      call->fptr);
3913                         S390_CALL_TEMPLATE (code, s390_r14);
3914                 }
3915                         break;
3916                 case OP_FCALL_REG: {
3917                         call = (MonoCallInst*)ins;
3918                         s390_lgr  (code, s390_r1, ins->sreg1);
3919                         s390_basr (code, s390_r14, s390_r1);
3920                         if (call->signature->ret->type == MONO_TYPE_R4)
3921                                 s390_ldebr (code, s390_f0, s390_f0);
3922                 }
3923                         break;
3924                 case OP_LCALL_REG:
3925                 case OP_VCALL_REG:
3926                 case OP_VCALL2_REG:
3927                 case OP_VOIDCALL_REG:
3928                 case OP_CALL_REG: {
3929                         s390_lgr  (code, s390_r1, ins->sreg1);
3930                         s390_basr (code, s390_r14, s390_r1);
3931                 }
3932                         break;
3933                 case OP_FCALL_MEMBASE: {
3934                         call = (MonoCallInst*)ins;
3935                         s390_lg   (code, s390_r1, 0, ins->sreg1, ins->inst_offset);
3936                         s390_basr (code, s390_r14, s390_r1);
3937                         if (call->signature->ret->type == MONO_TYPE_R4)
3938                                 s390_ldebr (code, s390_f0, s390_f0);
3939                 }
3940                         break;
3941                 case OP_LCALL_MEMBASE:
3942                 case OP_VCALL_MEMBASE:
3943                 case OP_VCALL2_MEMBASE:
3944                 case OP_VOIDCALL_MEMBASE:
3945                 case OP_CALL_MEMBASE: {
3946                         s390_lg   (code, s390_r1, 0, ins->sreg1, ins->inst_offset);
3947                         s390_basr (code, s390_r14, s390_r1);
3948                 }
3949                         break;
3950                 case OP_LOCALLOC: {
3951                         int alloca_skip;
3952                         int area_offset;
3953
3954                         if (cfg->param_area == 0)
3955                                 alloca_skip = S390_MINIMAL_STACK_SIZE;
3956                         else
3957                                 alloca_skip = cfg->param_area;
3958
3959                         area_offset = S390_ALIGN(alloca_skip, S390_STACK_ALIGNMENT);
3960                         s390_lgr  (code, s390_r1, ins->sreg1);
3961                         if (ins->flags & MONO_INST_INIT)
3962                                 s390_lgr  (code, s390_r0, ins->sreg1);
3963                         s390_aghi (code, s390_r1, 14);
3964                         s390_srlg (code, s390_r1, s390_r1, 0, 3);
3965                         s390_sllg (code, s390_r1, s390_r1, 0, 3);
3966                         if (cfg->method->save_lmf) {
3967                                 /*----------------------------------*/
3968                                 /* we have to adjust lmf ebp value  */
3969                                 /*----------------------------------*/
3970                                 int lmfOffset = cfg->stack_usage - sizeof(MonoLMF);
3971
3972                                 s390_lgr (code, s390_r13, cfg->frame_reg);
3973                                 if (s390_is_imm16(lmfOffset)) {
3974                                         s390_aghi (code, s390_r13, lmfOffset);
3975                                 } else if (s390_is_imm32(lmfOffset)) {
3976                                         s390_agfi (code, s390_r13, lmfOffset);
3977                                 } else {
3978                                         S390_SET  (code, s390_r13, lmfOffset);
3979                                 }
3980                                 s390_lgr (code, s390_r14, STK_BASE);
3981                                 s390_sgr (code, s390_r14, s390_r1);
3982                                 s390_stg (code, s390_r14, 0, s390_r13,
3983                                           G_STRUCT_OFFSET(MonoLMF, ebp));
3984                         }
3985                         s390_lg   (code, s390_r13, 0, STK_BASE, 0);
3986                         s390_sgr  (code, STK_BASE, s390_r1);
3987                         s390_stg  (code, s390_r13, 0, STK_BASE, 0);
3988                         s390_la   (code, ins->dreg, 0, STK_BASE, area_offset);
3989                         s390_srlg (code, ins->dreg, ins->dreg, 0, 3);
3990                         s390_sllg (code, ins->dreg, ins->dreg, 0, 3);
3991                         if (ins->flags & MONO_INST_INIT) {
3992                                 s390_lgr  (code, s390_r1, s390_r0);
3993                                 s390_lgr  (code, s390_r0, ins->dreg);
3994                                 s390_lgr  (code, s390_r14, s390_r12);
3995                                 s390_lghi (code, s390_r13, 0);
3996                                 s390_mvcle(code, s390_r0, s390_r12, 0, 0);
3997                                 s390_jo   (code, -2);
3998                                 s390_lgr  (code, s390_r12, s390_r14);
3999                         }
4000                 }
4001                         break;
4002                 case OP_THROW: {
4003                         s390_lgr  (code, s390_r2, ins->sreg1);
4004                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD,
4005                                              (gpointer) "mono_arch_throw_exception");
4006                         S390_CALL_TEMPLATE(code, s390_r14);
4007                 }
4008                         break;
4009                 case OP_RETHROW: {
4010                         s390_lgr  (code, s390_r2, ins->sreg1);
4011                         mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD,
4012                                              (gpointer) "mono_arch_rethrow_exception");
4013                         S390_CALL_TEMPLATE(code, s390_r14);
4014                 }
4015                         break;
4016                 case OP_START_HANDLER: {
4017                         MonoInst *spvar = mono_find_spvar_for_region (cfg, bb->region);
4018
4019                         S390_LONG (code, stg, stg, s390_r14, 0,
4020                                    spvar->inst_basereg,
4021                                    spvar->inst_offset);
4022                 }
4023                         break;
4024                 case OP_ENDFILTER: {
4025                         MonoInst *spvar = mono_find_spvar_for_region (cfg, bb->region);
4026
4027                         if (ins->sreg1 != s390_r2)
4028                                 s390_lgr(code, s390_r2, ins->sreg1);
4029                         S390_LONG (code, lg, lg, s390_r14, 0,
4030                                    spvar->inst_basereg,
4031                                    spvar->inst_offset);
4032                         s390_br  (code, s390_r14);
4033                 }
4034                         break;
4035                 case OP_ENDFINALLY: {
4036                         MonoInst *spvar = mono_find_spvar_for_region (cfg, bb->region);
4037
4038                         S390_LONG (code, lg, lg, s390_r14, 0,
4039                                    spvar->inst_basereg,
4040                                    spvar->inst_offset);
4041                         s390_br  (code, s390_r14);
4042                 }
4043                         break;
4044                 case OP_CALL_HANDLER: {
4045                         mono_add_patch_info (cfg, code-cfg->native_code,
4046                                              MONO_PATCH_INFO_BB, ins->inst_target_bb);
4047                         s390_brasl (code, s390_r14, 0);
4048                         mono_cfg_add_try_hole (cfg, ins->inst_eh_block, code, bb);
4049                 }
4050                         break;
4051                 case OP_LABEL: {
4052                         ins->inst_c0 = code - cfg->native_code;
4053                 }
4054                         break;
4055                 case OP_RELAXED_NOP:
4056                 case OP_NOP:
4057                 case OP_DUMMY_USE:
4058                 case OP_DUMMY_STORE:
4059                 case OP_NOT_REACHED:
4060                 case OP_NOT_NULL: {
4061                 }
4062                         break;
4063                 case OP_SEQ_POINT: {
4064                         int i;
4065
4066                         if (cfg->compile_aot)
4067                                 NOT_IMPLEMENTED;
4068
4069                         /*
4070                          * Read from the single stepping trigger page. This will cause a
4071                          * SIGSEGV when single stepping is enabled.
4072                          * We do this _before_ the breakpoint, so single stepping after
4073                          * a breakpoint is hit will step to the next IL offset.
4074                          */
4075                         if (ins->flags & MONO_INST_SINGLE_STEP_LOC) {
4076                                 breakpointCode.pTrigger = ss_trigger_page;
4077                                 memcpy(code, (void *) &breakpointCode, BREAKPOINT_SIZE);
4078                                 code += BREAKPOINT_SIZE;
4079                         }
4080
4081                         mono_add_seq_point (cfg, bb, ins, code - cfg->native_code);
4082
4083                         /*
4084                          * A placeholder for a possible breakpoint inserted by
4085                          * mono_arch_set_breakpoint ().
4086                          */
4087                         for (i = 0; i < (BREAKPOINT_SIZE / S390X_NOP_SIZE); ++i)
4088                                 s390_nop (code);
4089
4090                         /*
4091                          * Add an additional nop so skipping the bp doesn't cause the ip to point
4092                          * to another IL offset.
4093                          */
4094                         s390_nop (code);
4095
4096                         break;
4097                 }
4098
4099                 case OP_BR:
4100                         EMIT_UNCOND_BRANCH(ins);
4101                         break;
4102                 case OP_BR_REG: {
4103                         s390_br  (code, ins->sreg1);
4104                 }
4105                         break;
4106                 case OP_CEQ:
4107                 case OP_ICEQ:
4108                 case OP_LCEQ: {
4109                         s390_lghi(code, ins->dreg, 1);
4110                         s390_jz  (code, 4);
4111                         s390_lghi(code, ins->dreg, 0);
4112                 }
4113                         break;
4114                 case OP_CLT:
4115                 case OP_ICLT:
4116                 case OP_LCLT: {
4117                         s390_lghi(code, ins->dreg, 1);
4118                         s390_jl  (code, 4);
4119                         s390_lghi(code, ins->dreg, 0);
4120                 }
4121                         break;
4122                 case OP_CLT_UN:
4123                 case OP_ICLT_UN:
4124                 case OP_LCLT_UN: {
4125                         s390_lghi(code, ins->dreg, 1);
4126                         s390_jlo (code, 4);
4127                         s390_lghi(code, ins->dreg, 0);
4128                 }
4129                         break;
4130                 case OP_CGT:
4131                 case OP_ICGT:
4132                 case OP_LCGT: {
4133                         s390_lghi(code, ins->dreg, 1);
4134                         s390_jh  (code, 4);
4135                         s390_lghi(code, ins->dreg, 0);
4136                 }
4137                         break;
4138                 case OP_CGT_UN:
4139                 case OP_ICGT_UN:
4140                 case OP_LCGT_UN: {
4141                         s390_lghi(code, ins->dreg, 1);
4142                         s390_jho (code, 4);
4143                         s390_lghi(code, ins->dreg, 0);
4144                 }
4145                         break;
4146                 case OP_COND_EXC_EQ:
4147                 case OP_COND_EXC_IEQ:
4148                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_EQ, ins->inst_p1);
4149                         break;
4150                 case OP_COND_EXC_NE_UN:
4151                 case OP_COND_EXC_INE_UN:
4152                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NE, ins->inst_p1);
4153                         break;
4154                 case OP_COND_EXC_LT:
4155                 case OP_COND_EXC_ILT:
4156                 case OP_COND_EXC_LT_UN:
4157                 case OP_COND_EXC_ILT_UN:
4158                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, ins->inst_p1);
4159                         break;
4160                 case OP_COND_EXC_GT:
4161                 case OP_COND_EXC_IGT:
4162                 case OP_COND_EXC_GT_UN:
4163                 case OP_COND_EXC_IGT_UN:
4164                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GT, ins->inst_p1);
4165                         break;
4166                 case OP_COND_EXC_GE:
4167                 case OP_COND_EXC_IGE:
4168                 case OP_COND_EXC_GE_UN:
4169                 case OP_COND_EXC_IGE_UN:
4170                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_GE, ins->inst_p1);
4171                         break;
4172                 case OP_COND_EXC_LE:
4173                 case OP_COND_EXC_ILE:
4174                 case OP_COND_EXC_LE_UN:
4175                 case OP_COND_EXC_ILE_UN:
4176                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LE, ins->inst_p1);
4177                         break;
4178                 case OP_COND_EXC_OV:
4179                 case OP_COND_EXC_IOV:
4180                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, ins->inst_p1);
4181                         break;
4182                 case OP_COND_EXC_NO:
4183                 case OP_COND_EXC_INO:
4184                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NO, ins->inst_p1);
4185                         break;
4186                 case OP_COND_EXC_C:
4187                 case OP_COND_EXC_IC:
4188                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, ins->inst_p1);
4189                         break;
4190                 case OP_COND_EXC_NC:
4191                 case OP_COND_EXC_INC:
4192                         EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, ins->inst_p1);
4193                         break;
4194                 case OP_LBEQ:
4195                 case OP_IBEQ:
4196                         EMIT_COND_BRANCH (ins, S390_CC_EQ);
4197                         break;
4198                 case OP_LBNE_UN:
4199                 case OP_IBNE_UN:
4200                         EMIT_COND_BRANCH (ins, S390_CC_NE);
4201                         break;
4202                 case OP_LBLT:
4203                 case OP_LBLT_UN:
4204                 case OP_IBLT:
4205                 case OP_IBLT_UN:
4206                         EMIT_COND_BRANCH (ins, S390_CC_LT);
4207                         break;
4208                 case OP_LBGT:
4209                 case OP_LBGT_UN:
4210                 case OP_IBGT:
4211                 case OP_IBGT_UN:
4212                         EMIT_COND_BRANCH (ins, S390_CC_GT);
4213                         break;
4214                 case OP_LBGE:
4215                 case OP_LBGE_UN:
4216                 case OP_IBGE:
4217                 case OP_IBGE_UN:
4218                         EMIT_COND_BRANCH (ins, S390_CC_GE);
4219                         break;
4220                 case OP_LBLE:
4221                 case OP_LBLE_UN:
4222                 case OP_IBLE:
4223                 case OP_IBLE_UN:
4224                         EMIT_COND_BRANCH (ins, S390_CC_LE);
4225                         break;
4226
4227                 /* floating point opcodes */
4228                 case OP_R8CONST: {
4229                         if (*((double *) ins->inst_p0) == 0) {
4230                                 s390_lzdr (code, ins->dreg);
4231                         } else {
4232                                 S390_SET  (code, s390_r13, ins->inst_p0);
4233                                 s390_ld   (code, ins->dreg, 0, s390_r13, 0);
4234                         }
4235                 }
4236                         break;
4237                 case OP_R4CONST: {
4238                         if (*((float *) ins->inst_p0) == 0) {
4239                                 s390_lzdr (code, ins->dreg);
4240                         } else {
4241                                 S390_SET  (code, s390_r13, ins->inst_p0);
4242                                 s390_ldeb (code, ins->dreg, 0, s390_r13, 0);
4243                         }
4244                 }
4245                         break;
4246                 case OP_STORER8_MEMBASE_REG: {
4247                         S390_LONG (code, stdy, std, ins->sreg1, 0,
4248                                    ins->inst_destbasereg, ins->inst_offset);
4249                 }
4250                         break;
4251                 case OP_LOADR8_MEMBASE: {
4252                         S390_LONG (code, ldy, ld, ins->dreg, 0,
4253                                    ins->inst_basereg, ins->inst_offset);
4254                 }
4255                         break;
4256                 case OP_STORER4_MEMBASE_REG: {
4257                         s390_ledbr (code, s390_f15, ins->sreg1);
4258                         S390_LONG (code, stey, ste, s390_f15, 0,
4259                                    ins->inst_destbasereg, ins->inst_offset);
4260                 }
4261                         break;
4262                 case OP_LOADR4_MEMBASE: {
4263                         S390_LONG (code, ldy, ld, s390_f15, 0,
4264                                    ins->inst_basereg, ins->inst_offset);
4265                         s390_ldebr (code, ins->dreg, s390_f15);
4266                 }
4267                         break;
4268                 case OP_ICONV_TO_R_UN: {
4269                         s390_cdfbr (code, ins->dreg, ins->sreg1);
4270                         s390_ltr   (code, ins->sreg1, ins->sreg1);
4271                         s390_jnl   (code, 8);
4272                         S390_SET   (code, s390_r13, 0x41f0000000000000llu);
4273                         s390_ldgr  (code, s390_f15, s390_r13);
4274                         s390_adbr  (code, ins->dreg, s390_f15);
4275                 }
4276                         break;
4277                 case OP_LCONV_TO_R_UN: {
4278                         s390_cdgbr (code, ins->dreg, ins->sreg1);
4279                         s390_ltgr  (code, ins->sreg1, ins->sreg1);
4280                         s390_jnl   (code, 8);
4281                         S390_SET   (code, s390_r13, 0x41f0000000000000llu);
4282                         s390_ldgr  (code, s390_f15, s390_r13);
4283                         s390_adbr  (code, ins->dreg, s390_f15);
4284                 }
4285                         break;
4286                 case OP_LCONV_TO_R4:
4287                 case OP_ICONV_TO_R4: {
4288                         s390_cegbr (code, ins->dreg, ins->sreg1);
4289                         s390_ldebr (code, ins->dreg, ins->dreg);
4290                 }
4291                         break;
4292                 case OP_LCONV_TO_R8:
4293                 case OP_ICONV_TO_R8: {
4294                         s390_cdgbr (code, ins->dreg, ins->sreg1);
4295                 }
4296                         break;
4297                 case OP_FCONV_TO_I1:
4298                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 1, TRUE);
4299                         break;
4300                 case OP_FCONV_TO_U1:
4301                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 1, FALSE);
4302                         break;
4303                 case OP_FCONV_TO_I2:
4304                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 2, TRUE);
4305                         break;
4306                 case OP_FCONV_TO_U2:
4307                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 2, FALSE);
4308                         break;
4309                 case OP_FCONV_TO_I4:
4310                 case OP_FCONV_TO_I:
4311                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 4, TRUE);
4312                         break;
4313                 case OP_FCONV_TO_U4:
4314                 case OP_FCONV_TO_U:
4315                         code = emit_float_to_int (cfg, code, ins->dreg, ins->sreg1, 4, FALSE);
4316                         break;
4317                 case OP_FCONV_TO_I8:
4318                         s390_cgdbr (code, ins->dreg, 5, ins->sreg1);
4319                         break;
4320                 case OP_LCONV_TO_OVF_I: {
4321                         /* Valid ints: 0xffffffff:8000000 to 00000000:0x7f000000 */
4322                         short int *o[5];
4323                         s390_ltgr (code, ins->sreg2, ins->sreg2);
4324                         s390_jnl  (code, 0); CODEPTR(code, o[0]);
4325                         s390_ltgr (code, ins->sreg1, ins->sreg1);
4326                         s390_jnl  (code, 0); CODEPTR(code, o[1]);
4327                         s390_lhi  (code, s390_r13, -1);
4328                         s390_cgr  (code, ins->sreg1, s390_r13);
4329                         s390_jnz  (code, 0); CODEPTR(code, o[2]);
4330                         if (ins->dreg != ins->sreg2)
4331                                 s390_lgr  (code, ins->dreg, ins->sreg2);
4332                         s390_j    (code, 0); CODEPTR(code, o[3]);
4333                         PTRSLOT(code, o[0]);
4334                         s390_jz   (code, 0); CODEPTR(code, o[4]);
4335                         PTRSLOT(code, o[1]);
4336                         PTRSLOT(code, o[2]);
4337                         mono_add_patch_info (cfg, code - cfg->native_code,
4338                                              MONO_PATCH_INFO_EXC, "OverflowException");
4339                         s390_brasl (code, s390_r14, 0);
4340                         PTRSLOT(code, o[3]);
4341                         PTRSLOT(code, o[4]);
4342                 }
4343                         break;
4344                 case OP_ABS: {
4345                         s390_lpdbr (code, ins->dreg, ins->sreg1);
4346                 }
4347                         break;
4348                 case OP_SQRT: {
4349                         s390_sqdbr (code, ins->dreg, ins->sreg1);
4350                 }
4351                         break;
4352                 case OP_FADD: {
4353                         CHECK_SRCDST_COM_F;
4354                         s390_adbr (code, ins->dreg, src2);
4355                 }
4356                         break;
4357                 case OP_FSUB: {
4358                         CHECK_SRCDST_NCOM_F;
4359                         s390_sdbr (code, ins->dreg, src2);
4360                 }
4361                         break;
4362                 case OP_FMUL: {
4363                         CHECK_SRCDST_COM_F;
4364                         s390_mdbr (code, ins->dreg, src2);
4365                 }
4366                         break;
4367                 case OP_FDIV: {
4368                         CHECK_SRCDST_NCOM_F;
4369                         s390_ddbr (code, ins->dreg, src2);
4370                 }
4371                         break;
4372                 case OP_FNEG: {
4373                         s390_lcdbr (code, ins->dreg, ins->sreg1);
4374                 }
4375                         break;
4376                 case OP_FREM: {
4377                         CHECK_SRCDST_NCOM_F;
4378                         s390_didbr (code, ins->dreg, src2, 5, s390_f15);
4379                 }
4380                         break;
4381                 case OP_FCOMPARE: {
4382                         s390_cdbr (code, ins->sreg1, ins->sreg2);
4383                 }
4384                         break;
4385                 case OP_FCEQ: {
4386                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4387                         s390_lghi  (code, ins->dreg, 1);
4388                         s390_je    (code, 4);
4389                         s390_lghi  (code, ins->dreg, 0);
4390                 }
4391                         break;
4392                 case OP_FCLT: {
4393                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4394                         s390_lghi  (code, ins->dreg, 1);
4395                         s390_jl    (code, 4);
4396                         s390_lghi  (code, ins->dreg, 0);
4397                 }
4398                         break;
4399                 case OP_FCLT_UN: {
4400                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4401                         s390_lghi  (code, ins->dreg, 1);
4402                         s390_jlo   (code, 4);
4403                         s390_lghi  (code, ins->dreg, 0);
4404                 }
4405                         break;
4406                 case OP_FCGT: {
4407                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4408                         s390_lghi  (code, ins->dreg, 1);
4409                         s390_jh    (code, 4);
4410                         s390_lghi  (code, ins->dreg, 0);
4411                 }
4412                         break;
4413                 case OP_FCGT_UN: {
4414                         s390_cdbr  (code, ins->sreg1, ins->sreg2);
4415                         s390_lghi  (code, ins->dreg, 1);
4416                         s390_jho   (code, 4);
4417                         s390_lghi  (code, ins->dreg, 0);
4418                 }
4419                         break;
4420                 case OP_FBEQ: {
4421                         short *o;
4422                         s390_jo (code, 0); CODEPTR(code, o);
4423                         EMIT_COND_BRANCH (ins, S390_CC_EQ);
4424                         PTRSLOT (code, o);
4425                 }
4426                         break;
4427                 case OP_FBNE_UN:
4428                         EMIT_COND_BRANCH (ins, S390_CC_NE|S390_CC_OV);
4429                         break;
4430                 case OP_FBLT: {
4431                         short *o;
4432                         s390_jo (code, 0); CODEPTR(code, o);
4433                         EMIT_COND_BRANCH (ins, S390_CC_LT);
4434                         PTRSLOT (code, o);
4435                 }
4436                         break;
4437                 case OP_FBLT_UN:
4438                         EMIT_COND_BRANCH (ins, S390_CC_LT|S390_CC_OV);
4439                         break;
4440                 case OP_FBGT: {
4441                         short *o;
4442                         s390_jo (code, 0); CODEPTR(code, o);
4443                         EMIT_COND_BRANCH (ins, S390_CC_GT);
4444                         PTRSLOT (code, o);
4445                 }
4446                         break;
4447                 case OP_FBGT_UN:
4448                         EMIT_COND_BRANCH (ins, S390_CC_GT|S390_CC_OV);
4449                         break;
4450                 case OP_FBGE: {
4451                         short *o;
4452                         s390_jo (code, 0); CODEPTR(code, o);
4453                         EMIT_COND_BRANCH (ins, S390_CC_GE);
4454                         PTRSLOT (code, o);
4455                 }
4456                         break;
4457                 case OP_FBGE_UN:
4458                         EMIT_COND_BRANCH (ins, S390_CC_GE|S390_CC_OV);
4459                         break;
4460                 case OP_FBLE: {
4461                         short *o;
4462                         s390_jo (code, 0); CODEPTR(code, o);
4463                         EMIT_COND_BRANCH (ins, S390_CC_LE);
4464                         PTRSLOT (code, o);
4465                 }
4466                         break;
4467                 case OP_FBLE_UN:
4468                         EMIT_COND_BRANCH (ins, S390_CC_LE|S390_CC_OV);
4469                         break;
4470                 case OP_CKFINITE: {
4471                         short *o;
4472                         s390_lhi  (code, s390_r13, 0x7f);
4473                         s390_tcdb (code, ins->sreg1, 0, s390_r13, 0);
4474                         s390_jz   (code, 0); CODEPTR(code, o);
4475                         mono_add_patch_info (cfg, code - cfg->native_code,
4476                                              MONO_PATCH_INFO_EXC, "ArithmeticException");
4477                         s390_brasl (code, s390_r14,0);
4478                         PTRSLOT(code, o);
4479                 }
4480                         break;
4481                 case OP_S390_MOVE: {
4482                         if (ins->backend.size > 0) {
4483                                 if (ins->backend.size <= 256) {
4484                                         s390_mvc  (code, ins->backend.size, ins->dreg,
4485                                                    ins->inst_offset, ins->sreg1, ins->inst_imm);
4486                                 } else {
4487                                         s390_lgr  (code, s390_r0, ins->dreg);
4488                                         if (ins->inst_offset > 0) {
4489                                                 if (s390_is_imm16 (ins->inst_offset)) {
4490                                                         s390_aghi (code, s390_r0, ins->inst_offset);
4491                                                 } else if (s390_is_imm32 (ins->inst_offset)) {
4492                                                         s390_agfi (code, s390_r0, ins->inst_offset);
4493                                                 } else {
4494                                                         S390_SET  (code, s390_r13, ins->inst_offset);
4495                                                         s390_agr  (code, s390_r0, s390_r13);
4496                                                 }
4497                                         }
4498                                         s390_lgr  (code, s390_r12, ins->sreg1);
4499                                         if (ins->inst_imm > 0) {
4500                                                 if (s390_is_imm16 (ins->inst_imm)) {
4501                                                         s390_aghi (code, s390_r12, ins->inst_imm);
4502                                                 } else if (s390_is_imm32 (ins->inst_imm)) {
4503                                                         s390_agfi (code, s390_r12, ins->inst_imm);
4504                                                 } else {
4505                                                         S390_SET  (code, s390_r13, ins->inst_imm);
4506                                                         s390_agr  (code, s390_r12, s390_r13);
4507                                                 }
4508                                         }
4509                                         if (s390_is_imm16 (ins->backend.size)) {
4510                                                 s390_lghi (code, s390_r1, ins->backend.size);
4511                                         } else if (s390_is_imm32 (ins->inst_offset)) {
4512                                                 s390_agfi (code, s390_r1, ins->backend.size);
4513                                         } else {
4514                                                 S390_SET  (code, s390_r13, ins->backend.size);
4515                                                 s390_agr  (code, s390_r1, s390_r13);
4516                                         }
4517                                         s390_lgr  (code, s390_r13, s390_r1);
4518                                         s390_mvcle(code, s390_r0, s390_r12, 0, 0);
4519                                         s390_jo   (code, -2);
4520                                 }
4521                         }
4522                 }
4523                         break;
4524                 case OP_ATOMIC_ADD_I8: {
4525                         s390_lgr (code, s390_r1, ins->sreg2);
4526                         s390_lg  (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4527                         s390_agr (code, s390_r1, s390_r0);
4528                         s390_csg (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
4529                         s390_jnz (code, -10);
4530                         s390_lgr (code, ins->dreg, s390_r1);
4531                 }
4532                         break;
4533                 case OP_ATOMIC_EXCHANGE_I8: {
4534                         s390_lg  (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4535                         s390_csg (code, s390_r0, ins->sreg2, ins->inst_basereg, ins->inst_offset);
4536                         s390_jnz (code, -6);
4537                         s390_lgr (code, ins->dreg, s390_r0);
4538                 }
4539                         break;
4540                 case OP_ATOMIC_ADD_I4: {
4541                         s390_lgfr(code, s390_r1, ins->sreg2);
4542                         s390_lgf (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4543                         s390_agr (code, s390_r1, s390_r0);
4544                         s390_cs  (code, s390_r0, s390_r1, ins->inst_basereg, ins->inst_offset);
4545                         s390_jnz (code, -9);
4546                         s390_lgfr(code, ins->dreg, s390_r1);
4547                 }
4548                         break;
4549                 case OP_ATOMIC_EXCHANGE_I4: {
4550                         s390_l   (code, s390_r0, 0, ins->inst_basereg, ins->inst_offset);
4551                         s390_cs  (code, s390_r0, ins->sreg2, ins->inst_basereg, ins->inst_offset);
4552                         s390_jnz (code, -4);
4553                         s390_lgfr(code, ins->dreg, s390_r0);
4554                 }
4555                         break;
4556                 case OP_S390_BKCHAIN: {
4557                         s390_lgr  (code, ins->dreg, ins->sreg1);
4558                         if (s390_is_imm16 (cfg->stack_offset)) {
4559                                 s390_aghi (code, ins->dreg, cfg->stack_offset);
4560                         } else if (s390_is_imm32 (cfg->stack_offset)) {
4561                                 s390_agfi (code, ins->dreg, cfg->stack_offset);
4562                         } else {
4563                                 S390_SET  (code, s390_r13, cfg->stack_offset);
4564                                 s390_agr  (code, ins->dreg, s390_r13);
4565                         }
4566                 }
4567                         break;
4568                 case OP_MEMORY_BARRIER: {
4569                 }
4570                         break;
4571                 case OP_GC_LIVENESS_DEF:
4572                 case OP_GC_LIVENESS_USE:
4573                 case OP_GC_PARAM_SLOT_LIVENESS_DEF:
4574                         ins->backend.pc_offset = code - cfg->native_code;
4575                         break;
4576                 case OP_GC_SPILL_SLOT_LIVENESS_DEF:
4577                         ins->backend.pc_offset = code - cfg->native_code;
4578                         bb->spill_slot_defs = g_slist_prepend_mempool (cfg->mempool, bb->spill_slot_defs, ins);
4579                         break;
4580                 default:
4581                         g_warning ("unknown opcode %s in %s()\n", mono_inst_name (ins->opcode), __FUNCTION__);
4582                         g_assert_not_reached ();
4583                 }
4584
4585                 if ((cfg->opt & MONO_OPT_BRANCH) && ((code - cfg->native_code - offset) > max_len)) {
4586                         g_warning ("wrong maximal instruction length of instruction %s (expected %d, got %ld)",
4587                                    mono_inst_name (ins->opcode), max_len, code - cfg->native_code - offset);
4588                         g_assert_not_reached ();
4589                 }
4590
4591                 cpos += max_len;
4592
4593                 last_offset = offset;
4594         }
4595
4596         cfg->code_len = code - cfg->native_code;
4597 }
4598
4599 /*========================= End of Function ========================*/
4600
4601 /*------------------------------------------------------------------*/
4602 /*                                                                  */
4603 /* Name         - mono_arch_register_lowlevel_calls                 */
4604 /*                                                                  */
4605 /* Function     - Register routines to help with --trace operation. */
4606 /*                                                                  */
4607 /*------------------------------------------------------------------*/
4608
4609 void
4610 mono_arch_register_lowlevel_calls (void)
4611 {
4612 }
4613
4614 /*========================= End of Function ========================*/
4615
4616 /*------------------------------------------------------------------*/
4617 /*                                                                  */
4618 /* Name         - mono_arch_patch_code                              */
4619 /*                                                                  */
4620 /* Function     - Process the patch data created during the         */
4621 /*                instruction build process. This resolves jumps,   */
4622 /*                calls, variables etc.                             */
4623 /*                                                                  */
4624 /*------------------------------------------------------------------*/
4625
4626 void
4627 mono_arch_patch_code (MonoMethod *method, MonoDomain *domain,
4628                       guint8 *code, MonoJumpInfo *ji, MonoCodeManager *dyn_code_mp, gboolean run_cctors)
4629 {
4630         MonoJumpInfo *patch_info;
4631
4632         for (patch_info = ji; patch_info; patch_info = patch_info->next) {
4633                 unsigned char *ip = patch_info->ip.i + code;
4634                 gconstpointer target = NULL;
4635
4636                 target = mono_resolve_patch_target (method, domain, code,
4637                                                     patch_info, run_cctors);
4638
4639                 switch (patch_info->type) {
4640                         case MONO_PATCH_INFO_IP:
4641                         case MONO_PATCH_INFO_LDSTR:
4642                         case MONO_PATCH_INFO_TYPE_FROM_HANDLE:
4643                         case MONO_PATCH_INFO_LDTOKEN:
4644                         case MONO_PATCH_INFO_EXC:
4645                                 s390_patch_addr (ip, (guint64) target);
4646                                 continue;
4647                         case MONO_PATCH_INFO_METHOD:
4648                         case MONO_PATCH_INFO_INTERNAL_METHOD:
4649                         case MONO_PATCH_INFO_JIT_ICALL_ADDR:
4650                         case MONO_PATCH_INFO_CLASS_INIT:
4651                         case MONO_PATCH_INFO_GENERIC_CLASS_INIT:
4652                         case MONO_PATCH_INFO_RGCTX_FETCH:
4653                         case MONO_PATCH_INFO_ABS: {
4654                                 S390_EMIT_CALL (ip, target);
4655                                 continue;
4656                         }
4657                         case MONO_PATCH_INFO_SWITCH:
4658                                 /*----------------------------------*/
4659                                 /* ip points at the basr r13,0/j +4 */
4660                                 /* instruction the vtable value     */
4661                                 /* follows this (i.e. ip+6)         */
4662                                 /*----------------------------------*/
4663                                 S390_EMIT_LOAD (ip, target);
4664                                 continue;
4665                         case MONO_PATCH_INFO_METHODCONST:
4666                         case MONO_PATCH_INFO_CLASS:
4667                         case MONO_PATCH_INFO_IMAGE:
4668                         case MONO_PATCH_INFO_FIELD:
4669                         case MONO_PATCH_INFO_IID:
4670                         case MONO_PATCH_INFO_EXC_NAME:
4671                                 target = S390_RELATIVE(target, ip);
4672                                 s390_patch_rel (ip, (guint64) target);
4673                                 continue;
4674                         case MONO_PATCH_INFO_R4:
4675                         case MONO_PATCH_INFO_R8:
4676                         case MONO_PATCH_INFO_METHOD_REL:
4677                                 g_assert_not_reached ();
4678                                 continue;
4679                         default:
4680                                 target = S390_RELATIVE(target, ip);
4681                                 ip += 2;
4682                                 s390_patch_rel (ip, (guint64) target);
4683                 }
4684         }
4685 }
4686
4687 /*========================= End of Function ========================*/
4688
4689 /*------------------------------------------------------------------*/
4690 /*                                                                  */
4691 /* Name         - emit_load_volatile_arguments                      */
4692 /*                                                                  */
4693 /* Function     - Emit the instructions to reload parameter regist- */
4694 /*                registers for use with "tail" operations.         */
4695 /*                                                                  */
4696 /*                The register loading operations performed here    */
4697 /*                are the mirror of the store operations performed  */
4698 /*                in mono_arch_emit_prolog and need to be kept in   */
4699 /*                synchronization with it.                          */
4700 /*                                                                  */
4701 /*------------------------------------------------------------------*/
4702
4703 guint8 *
4704 emit_load_volatile_arguments (guint8 *code, MonoCompile *cfg)
4705 {
4706         MonoInst *inst;
4707         MonoMethod *method = cfg->method;
4708         MonoMethodSignature *sig = mono_method_signature(method);
4709         int pos = 0, i;
4710         CallInfo *cinfo;
4711
4712         cinfo = get_call_info (NULL, NULL, sig);
4713
4714         if (cinfo->struct_ret) {
4715                 ArgInfo *ainfo = &cinfo->ret;
4716                 inst         = cfg->vret_addr;
4717                 s390_lg (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4718         }
4719
4720         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
4721                 ArgInfo *ainfo = cinfo->args + i;
4722                 inst = cfg->args [pos];
4723
4724                 if (inst->opcode == OP_REGVAR) {
4725                         if (ainfo->regtype == RegTypeGeneral)
4726                                 s390_lgr (code, ainfo->reg, inst->dreg);
4727                         else if (ainfo->regtype == RegTypeFP) {
4728                                 if (inst->dreg != ainfo->reg) {
4729                                         if (ainfo->size == 4) {
4730                                                 s390_ldebr (code, ainfo->reg, inst->dreg);
4731                                         } else {
4732                                                 s390_ldr   (code, ainfo->reg, inst->dreg);
4733                                         }
4734                                 }
4735                         }
4736                         else if (ainfo->regtype == RegTypeBase) {
4737                         } else
4738                                 g_assert_not_reached ();
4739                 } else {
4740                         if (ainfo->regtype == RegTypeGeneral) {
4741                                 if (!((ainfo->reg >= 2) && (ainfo->reg <= 6)))
4742                                         g_assert_not_reached();
4743                                 switch (ainfo->size) {
4744                                 case 1:
4745                                         s390_llgc (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4746                                         break;
4747                                 case 2:
4748                                         s390_lgh  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4749                                         break;
4750                                 case 4:
4751                                         s390_lgf (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4752                                         break;
4753                                 case 8:
4754                                         s390_lg  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4755                                         break;
4756                                 }
4757                         } else if (ainfo->regtype == RegTypeBase) {
4758                         } else if (ainfo->regtype == RegTypeFP) {
4759                                 if (ainfo->size == 8)
4760                                         s390_ld  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4761                                 else if (ainfo->size == 4)
4762                                         s390_le  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4763                                 else
4764                                         g_assert_not_reached ();
4765                         } else if (ainfo->regtype == RegTypeStructByVal) {
4766                                 if (ainfo->reg != STK_BASE) {
4767                                         switch (ainfo->size) {
4768                                         case 1:
4769                                                 s390_llgc (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4770                                                 break;
4771                                         case 2:
4772                                                 s390_lgh (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4773                                                 break;
4774                                         case 4:
4775                                                 s390_lgf (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4776                                                 break;
4777                                         case 8:
4778                                                 s390_lg  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4779                                                 break;
4780                                         }
4781                                 }
4782                         } else if (ainfo->regtype == RegTypeStructByAddr) {
4783                                 if (ainfo->reg != STK_BASE) {
4784                                         s390_lg (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4785                                 }
4786                         } else
4787                                 g_assert_not_reached ();
4788                 }
4789                 pos++;
4790         }
4791
4792         return code;
4793 }
4794
4795 /*========================= End of Function ========================*/
4796
4797 /*------------------------------------------------------------------*/
4798 /*                                                                  */
4799 /* Name         - mono_arch_emit_prolog                             */
4800 /*                                                                  */
4801 /* Function     - Create the instruction sequence for a function    */
4802 /*                prolog.                                           */
4803 /*                                                                  */
4804 /*------------------------------------------------------------------*/
4805
4806 guint8 *
4807 mono_arch_emit_prolog (MonoCompile *cfg)
4808 {
4809         MonoMethod *method = cfg->method;
4810         MonoBasicBlock *bb;
4811         MonoMethodSignature *sig;
4812         MonoInst *inst;
4813         long alloc_size, pos, max_offset, i, cfa_offset = 0;
4814         guint8 *code;
4815         guint32 size;
4816         CallInfo *cinfo;
4817         int tracing = 0;
4818         int lmfOffset;
4819
4820         cfg->code_size   = 512;
4821
4822         if (mono_jit_trace_calls != NULL && mono_trace_eval (method)) {
4823                 tracing         = 1;
4824                 cfg->code_size += 256;
4825         } else if (cfg->prof_options & MONO_PROFILE_ENTER_LEAVE)
4826                 cfg->code_size += 256;
4827
4828         if (method->save_lmf)
4829                 cfg->code_size += 200;
4830
4831         cfg->native_code = code = g_malloc (cfg->code_size);
4832
4833         mono_emit_unwind_op_def_cfa (cfg, code, STK_BASE, 0);
4834         emit_unwind_regs(cfg, code, s390_r6, s390_r14, S390_REG_SAVE_OFFSET);
4835         s390_stmg (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
4836         mono_emit_unwind_op_offset (cfg, code, s390_r14, S390_RET_ADDR_OFFSET);
4837
4838         if (cfg->arch.bkchain_reg != -1)
4839                 s390_lgr (code, cfg->arch.bkchain_reg, STK_BASE);
4840
4841         if (cfg->flags & MONO_CFG_HAS_ALLOCA) {
4842                 cfg->used_int_regs |= 1 << 11;
4843         }
4844
4845         alloc_size = cfg->stack_offset;
4846
4847         cfg->stack_usage = cfa_offset = alloc_size;
4848         mono_emit_unwind_op_def_cfa_offset (cfg, code, alloc_size);
4849         s390_lgr  (code, s390_r11, STK_BASE);
4850         if (s390_is_imm16 (alloc_size)) {
4851                 s390_aghi (code, STK_BASE, -alloc_size);
4852         } else if (s390_is_imm32 (alloc_size)) {
4853                 s390_agfi (code, STK_BASE, -alloc_size);
4854         } else {
4855                 int stackSize = alloc_size;
4856                 while (stackSize > INT_MAX) {
4857                         s390_agfi (code, STK_BASE, -INT_MAX);
4858                         stackSize -= INT_MAX;
4859                 }
4860                 s390_agfi (code, STK_BASE, -stackSize);
4861         }
4862         s390_stg  (code, s390_r11, 0, STK_BASE, 0);
4863
4864         if (cfg->frame_reg != STK_BASE)
4865                 s390_lgr (code, s390_r11, STK_BASE);
4866
4867         mono_emit_unwind_op_def_cfa_reg (cfg, code, cfg->frame_reg);
4868
4869         /* store runtime generic context */
4870         if (cfg->rgctx_var) {
4871                 g_assert (cfg->rgctx_var->opcode == OP_REGOFFSET);
4872
4873                 s390_stg  (code, MONO_ARCH_RGCTX_REG, 0,
4874                            cfg->rgctx_var->inst_basereg,
4875                            cfg->rgctx_var->inst_offset);
4876         }
4877
4878         /* compute max_offset in order to use short forward jumps
4879          * we always do it on s390 because the immediate displacement
4880          * for jumps is too small
4881          */
4882         max_offset = 0;
4883         for (bb = cfg->bb_entry; bb; bb = bb->next_bb) {
4884                 MonoInst *ins;
4885                 bb->max_offset = max_offset;
4886
4887                 if (cfg->prof_options & MONO_PROFILE_COVERAGE)
4888                         max_offset += 6;
4889
4890                 MONO_BB_FOR_EACH_INS (bb, ins)
4891                         max_offset += ((guint8 *)ins_get_spec (ins->opcode))[MONO_INST_LEN];
4892         }
4893
4894         /* load arguments allocated to register from the stack */
4895         sig = mono_method_signature (method);
4896         pos = 0;
4897
4898         cinfo = get_call_info (cfg, cfg->mempool, sig);
4899
4900         if (cinfo->struct_ret) {
4901                 ArgInfo *ainfo     = &cinfo->ret;
4902                 inst               = cfg->vret_addr;
4903                 inst->backend.size = ainfo->vtsize;
4904                 s390_stg (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4905         }
4906
4907         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
4908                 ArgInfo *ainfo = cinfo->args + i;
4909                 inst = cfg->args [pos];
4910
4911                 if (inst->opcode == OP_VTARG_ADDR)
4912                         inst = inst->inst_left;
4913
4914                 if (inst->opcode == OP_REGVAR) {
4915                         if (ainfo->regtype == RegTypeGeneral)
4916                                 s390_lgr (code, inst->dreg, ainfo->reg);
4917                         else if (ainfo->regtype == RegTypeFP) {
4918                                 if (inst->dreg != ainfo->reg) {
4919                                         if (ainfo->size == 4) {
4920                                                 s390_ledbr (code, inst->dreg, ainfo->reg);
4921                                         } else {
4922                                                 s390_ldr   (code, inst->dreg, ainfo->reg);
4923                                         }
4924                                 }
4925                         }
4926                         else if (ainfo->regtype == RegTypeBase) {
4927                                 s390_lgr  (code, s390_r13, STK_BASE);
4928                                 s390_aghi (code, s390_r13, alloc_size);
4929                                 s390_lg   (code, inst->dreg, 0, s390_r13, ainfo->offset);
4930                         } else
4931                                 g_assert_not_reached ();
4932
4933                         if (cfg->verbose_level > 2)
4934                                 g_print ("Argument %d assigned to register %s\n",
4935                                          pos, mono_arch_regname (inst->dreg));
4936                 } else {
4937                         if (ainfo->regtype == RegTypeGeneral) {
4938                                 if (!((ainfo->reg >= 2) && (ainfo->reg <= 6)))
4939                                         g_assert_not_reached();
4940                                 switch (ainfo->size) {
4941                                 case 1:
4942                                         s390_stc (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4943                                         break;
4944                                 case 2:
4945                                         s390_sth (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4946                                         break;
4947                                 case 4:
4948                                         s390_st (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4949                                         break;
4950                                 case 8:
4951                                         s390_stg (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4952                                         break;
4953                                 }
4954                         } else if (ainfo->regtype == RegTypeBase) {
4955                         } else if (ainfo->regtype == RegTypeFP) {
4956                                 if (ainfo->size == 8)
4957                                         s390_std (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4958                                 else if (ainfo->size == 4)
4959                                         s390_ste (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
4960                                 else
4961                                         g_assert_not_reached ();
4962                         } else if (ainfo->regtype == RegTypeStructByVal) {
4963                                 int doffset = inst->inst_offset;
4964                                 int reg;
4965                                 if (ainfo->reg != STK_BASE)
4966                                         reg = ainfo->reg;
4967                                 else {
4968                                         reg = s390_r0;
4969                                         s390_lgr  (code, s390_r13, STK_BASE);
4970                                         s390_aghi (code, s390_r13, alloc_size);
4971                                 }
4972
4973                                 size = (method->wrapper_type == MONO_WRAPPER_MANAGED_TO_NATIVE
4974                                         ? mono_class_native_size(mono_class_from_mono_type(inst->inst_vtype), NULL)
4975                                         : ainfo->size);
4976
4977                                 switch (size) {
4978                                         case 1:
4979                                                 if (ainfo->reg == STK_BASE)
4980                                                         s390_ic (code, reg, 0, s390_r13, ainfo->offset+7);
4981                                                 s390_stc (code, reg, 0, inst->inst_basereg, doffset);
4982                                                 break;
4983                                         case 2:
4984                                                 if (ainfo->reg == STK_BASE)
4985                                                         s390_lh (code, reg, 0, s390_r13, ainfo->offset+6);
4986                                                 s390_sth (code, reg, 0, inst->inst_basereg, doffset);
4987                                                 break;
4988                                         case 4:
4989                                                 if (ainfo->reg == STK_BASE)
4990                                                         s390_l  (code, reg, 0, s390_r13, ainfo->offset+4);
4991                                                 s390_st (code, reg, 0, inst->inst_basereg, doffset);
4992                                                 break;
4993                                         case 8:
4994                                                 if (ainfo->reg == STK_BASE)
4995                                                         s390_lg  (code, reg, 0, s390_r13, ainfo->offset);
4996                                                 s390_stg (code, reg, 0, inst->inst_basereg, doffset);
4997                                                 break;
4998                                 }
4999                         } else if (ainfo->regtype == RegTypeStructByAddr) {
5000                                 s390_stg (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
5001                         } else if (ainfo->regtype == RegTypeStructByAddrOnStack) {
5002                         } else
5003                                 g_assert_not_reached ();
5004                 }
5005                 pos++;
5006         }
5007
5008         if (method->save_lmf) {
5009                 /*---------------------------------------------------------------*/
5010                 /* build the MonoLMF structure on the stack - see mini-s390x.h   */
5011                 /*---------------------------------------------------------------*/
5012                 lmfOffset = alloc_size - sizeof(MonoLMF);
5013
5014                 s390_lgr   (code, s390_r13, cfg->frame_reg);
5015                 s390_aghi  (code, s390_r13, lmfOffset);
5016
5017                 /*---------------------------------------------------------------*/
5018                 /* Preserve the parameter registers while we fix up the lmf      */
5019                 /*---------------------------------------------------------------*/
5020                 s390_stmg  (code, s390_r2, s390_r6, s390_r13,
5021                             G_STRUCT_OFFSET(MonoLMF, pregs[0]));
5022
5023                 /*---------------------------------------------------------------*/
5024                 /* On return from this call r2 have the address of the &lmf      */
5025                 /*---------------------------------------------------------------*/
5026                 if (lmf_addr_tls_offset == -1) {
5027                         mono_add_patch_info (cfg, code - cfg->native_code,
5028                                              MONO_PATCH_INFO_INTERNAL_METHOD,
5029                                              (gpointer)"mono_get_lmf_addr");
5030                         S390_CALL_TEMPLATE(code, s390_r1);
5031                 } else {
5032                         /*-------------------------------------------------------*/
5033                         /* Get LMF by getting value from thread level storage    */
5034                         /*-------------------------------------------------------*/
5035                         s390_ear (code, s390_r1, 0);
5036                         s390_sllg(code, s390_r1, s390_r1, 0, 32);
5037                         s390_ear (code, s390_r1, 1);
5038                         s390_lg  (code, s390_r2, 0, s390_r1, lmf_addr_tls_offset);
5039                 }
5040
5041                 /*---------------------------------------------------------------*/
5042                 /* Set lmf.lmf_addr = jit_tls->lmf                               */
5043                 /*---------------------------------------------------------------*/
5044                 s390_stg   (code, s390_r2, 0, s390_r13,
5045                             G_STRUCT_OFFSET(MonoLMF, lmf_addr));
5046
5047                 /*---------------------------------------------------------------*/
5048                 /* Get current lmf                                               */
5049                 /*---------------------------------------------------------------*/
5050                 s390_lg    (code, s390_r0, 0, s390_r2, 0);
5051
5052                 /*---------------------------------------------------------------*/
5053                 /* Set our lmf as the current lmf                                */
5054                 /*---------------------------------------------------------------*/
5055                 s390_stg   (code, s390_r13, 0, s390_r2, 0);
5056
5057                 /*---------------------------------------------------------------*/
5058                 /* Have our lmf.previous_lmf point to the last lmf               */
5059                 /*---------------------------------------------------------------*/
5060                 s390_stg   (code, s390_r0, 0, s390_r13,
5061                             G_STRUCT_OFFSET(MonoLMF, previous_lmf));
5062
5063                 /*---------------------------------------------------------------*/
5064                 /* save method info                                              */
5065                 /*---------------------------------------------------------------*/
5066                 S390_SET   (code, s390_r1, method);
5067                 s390_stg   (code, s390_r1, 0, s390_r13,
5068                             G_STRUCT_OFFSET(MonoLMF, method));
5069
5070                 /*---------------------------------------------------------------*/
5071                 /* save the current IP                                           */
5072                 /*---------------------------------------------------------------*/
5073                 s390_stg   (code, STK_BASE, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, ebp));
5074                 s390_basr  (code, s390_r1, 0);
5075                 s390_stg   (code, s390_r1, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, eip));
5076
5077                 /*---------------------------------------------------------------*/
5078                 /* Save general and floating point registers                     */
5079                 /*---------------------------------------------------------------*/
5080                 s390_stmg  (code, s390_r2, s390_r12, s390_r13,
5081                             G_STRUCT_OFFSET(MonoLMF, gregs[2]));
5082                 for (i = 0; i < 16; i++) {
5083                         s390_std  (code, i, 0, s390_r13,
5084                                    G_STRUCT_OFFSET(MonoLMF, fregs[i]));
5085                 }
5086
5087                 /*---------------------------------------------------------------*/
5088                 /* Restore the parameter registers now that we've set up the lmf */
5089                 /*---------------------------------------------------------------*/
5090                 s390_lmg   (code, s390_r2, s390_r6, s390_r13,
5091                             G_STRUCT_OFFSET(MonoLMF, pregs[0]));
5092         }
5093
5094         if (tracing)
5095                 code = mono_arch_instrument_prolog(cfg, enter_method, code, TRUE);
5096
5097         cfg->code_len = code - cfg->native_code;
5098         g_assert (cfg->code_len < cfg->code_size);
5099
5100         return code;
5101 }
5102
5103 /*========================= End of Function ========================*/
5104
5105 /*------------------------------------------------------------------*/
5106 /*                                                                  */
5107 /* Name         - mono_arch_emit_epilog                             */
5108 /*                                                                  */
5109 /* Function     - Emit the instructions for a function epilog.      */
5110 /*                                                                  */
5111 /*------------------------------------------------------------------*/
5112
5113 void
5114 mono_arch_emit_epilog (MonoCompile *cfg)
5115 {
5116         MonoMethod *method = cfg->method;
5117         int tracing = 0;
5118         guint8 *code;
5119         int max_epilog_size = 96;
5120
5121         if (cfg->method->save_lmf)
5122                 max_epilog_size += 128;
5123
5124         if (mono_jit_trace_calls != NULL)
5125                 max_epilog_size += 128;
5126         else if (cfg->prof_options & MONO_PROFILE_ENTER_LEAVE)
5127                 max_epilog_size += 128;
5128
5129         while ((cfg->code_len + max_epilog_size) > (cfg->code_size - 16)) {
5130                 cfg->code_size  *= 2;
5131                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
5132                 cfg->stat_code_reallocs++;
5133         }
5134
5135         code = cfg->native_code + cfg->code_len;
5136
5137         if (mono_jit_trace_calls != NULL && mono_trace_eval (method)) {
5138                 code = mono_arch_instrument_epilog (cfg, leave_method, code, TRUE);
5139                 tracing = 1;
5140         }
5141
5142         if (method->save_lmf)
5143                 restoreLMF(code, cfg->frame_reg, cfg->stack_usage);
5144
5145         if (cfg->flags & MONO_CFG_HAS_ALLOCA) {
5146                 s390_lg  (code, STK_BASE, 0, STK_BASE, 0);
5147         } else
5148                 code = backUpStackPtr(cfg, code);
5149
5150         s390_lmg (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
5151         s390_br  (code, s390_r14);
5152
5153         cfg->code_len = code - cfg->native_code;
5154
5155         g_assert (cfg->code_len < cfg->code_size);
5156
5157 }
5158
5159 /*========================= End of Function ========================*/
5160
5161 /*------------------------------------------------------------------*/
5162 /*                                                                  */
5163 /* Name         - mono_arch_emit_exceptions                         */
5164 /*                                                                  */
5165 /* Function     - Emit the blocks to handle exception conditions.   */
5166 /*                                                                  */
5167 /*------------------------------------------------------------------*/
5168
5169 void
5170 mono_arch_emit_exceptions (MonoCompile *cfg)
5171 {
5172         MonoJumpInfo    *patch_info;
5173         guint8          *code;
5174         int             nThrows = 0,
5175                         exc_count = 0,
5176                         iExc;
5177         guint32         code_size;
5178         MonoClass       *exc_classes [MAX_EXC];
5179         guint8          *exc_throw_start [MAX_EXC];
5180
5181         for (patch_info = cfg->patch_info;
5182              patch_info;
5183              patch_info = patch_info->next) {
5184                 if (patch_info->type == MONO_PATCH_INFO_EXC)
5185                         exc_count++;
5186         }
5187
5188         code_size = exc_count * 48;
5189
5190         while ((cfg->code_len + code_size) > (cfg->code_size - 16)) {
5191                 cfg->code_size  *= 2;
5192                 cfg->native_code = g_realloc (cfg->native_code, cfg->code_size);
5193                 cfg->stat_code_reallocs++;
5194         }
5195
5196         code = cfg->native_code + cfg->code_len;
5197
5198         /*---------------------------------------------------------------------*/
5199         /* Add code to raise exceptions                                        */
5200         /*---------------------------------------------------------------------*/
5201         for (patch_info = cfg->patch_info; patch_info; patch_info = patch_info->next) {
5202                 switch (patch_info->type) {
5203                 case MONO_PATCH_INFO_EXC: {
5204                         guint8 *ip = patch_info->ip.i + cfg->native_code;
5205                         MonoClass *exc_class;
5206                         guint64 throw_ip;
5207
5208                         /*-----------------------------------------------------*/
5209                         /* Patch the branch in epilog to come here             */
5210                         /*-----------------------------------------------------*/
5211                         s390_patch_rel (ip + 2, (guint64) S390_RELATIVE(code,ip));
5212
5213                         exc_class = mono_class_from_name (mono_defaults.corlib,
5214                                                           "System",
5215                                                           patch_info->data.name);
5216                         g_assert (exc_class);
5217                         throw_ip = patch_info->ip.i;
5218
5219                         for (iExc = 0; iExc < nThrows; ++iExc)
5220                                 if (exc_classes [iExc] == exc_class)
5221                                         break;
5222
5223                         if (iExc < nThrows) {
5224                                 s390_jcl (code, S390_CC_UN,
5225                                           (guint64) exc_throw_start [iExc]);
5226                                 patch_info->type = MONO_PATCH_INFO_NONE;
5227                         } else {
5228
5229                                 if (nThrows < MAX_EXC) {
5230                                         exc_classes [nThrows]     = exc_class;
5231                                         exc_throw_start [nThrows] = code;
5232                                 }
5233
5234                                 /*---------------------------------------------*/
5235                                 /* Patch the parameter passed to the handler   */
5236                                 /*---------------------------------------------*/
5237                                 S390_SET  (code, s390_r2, exc_class->type_token);
5238                                 /*---------------------------------------------*/
5239                                 /* Load return address & parameter register    */
5240                                 /*---------------------------------------------*/
5241                                 s390_larl (code, s390_r14, (guint64)S390_RELATIVE((patch_info->ip.i +
5242                                                            cfg->native_code + 8), code));
5243                                 /*---------------------------------------------*/
5244                                 /* Reuse the current patch to set the jump     */
5245                                 /*---------------------------------------------*/
5246                                 patch_info->type      = MONO_PATCH_INFO_INTERNAL_METHOD;
5247                                 patch_info->data.name = "mono_arch_throw_corlib_exception";
5248                                 patch_info->ip.i      = code - cfg->native_code;
5249                                 S390_BR_TEMPLATE (code, s390_r1);
5250                         }
5251                         break;
5252                 }
5253                 default:
5254                         /* do nothing */
5255                         break;
5256                 }
5257         }
5258
5259         cfg->code_len = code - cfg->native_code;
5260
5261         g_assert (cfg->code_len < cfg->code_size);
5262
5263 }
5264
5265 /*========================= End of Function ========================*/
5266
5267 /*------------------------------------------------------------------*/
5268 /*                                                                  */
5269 /* Name         - mono_arch_finish_init                                 */
5270 /*                                                                  */
5271 /* Function     - Setup the JIT's Thread Level Specific Data.       */
5272 /*                                                                  */
5273 /*------------------------------------------------------------------*/
5274
5275 void
5276 mono_arch_finish_init (void)
5277 {
5278         appdomain_tls_offset = mono_domain_get_tls_offset();
5279         lmf_tls_offset = mono_get_lmf_tls_offset();
5280         lmf_addr_tls_offset = mono_get_lmf_addr_tls_offset();
5281 }
5282
5283 /*========================= End of Function ========================*/
5284
5285 /*------------------------------------------------------------------*/
5286 /*                                                                  */
5287 /* Name         - mono_arch_free_jit_tls_data                       */
5288 /*                                                                  */
5289 /* Function     - Free tls data.                                    */
5290 /*                                                                  */
5291 /*------------------------------------------------------------------*/
5292
5293 void
5294 mono_arch_free_jit_tls_data (MonoJitTlsData *tls)
5295 {
5296 }
5297
5298 /*========================= End of Function ========================*/
5299
5300 /*------------------------------------------------------------------*/
5301 /*                                                                  */
5302 /* Name         - mono_arch_emit_inst_for_method                    */
5303 /*                                                                  */
5304 /*------------------------------------------------------------------*/
5305
5306 MonoInst*
5307 mono_arch_emit_inst_for_method (MonoCompile *cfg, MonoMethod *cmethod, MonoMethodSignature *fsig, MonoInst **args)
5308 {
5309         return NULL;
5310 }
5311
5312 /*========================= End of Function ========================*/
5313
5314 /*------------------------------------------------------------------*/
5315 /*                                                                  */
5316 /* Name         - mono_arch_decompose_opts                          */
5317 /*                                                                  */
5318 /* Function     - Decompose opcode into a System z opcode.          */
5319 /*                                                                  */
5320 /*------------------------------------------------------------------*/
5321
5322 void
5323 mono_arch_decompose_opts (MonoCompile *cfg, MonoInst *ins)
5324 {
5325         /*
5326          * Have to rename these to avoid being decomposed normally, since the normal
5327          * decomposition does not work on S390.
5328          */
5329         switch (ins->opcode) {
5330         case OP_ISUB_OVF:
5331                 ins->opcode = OP_S390_ISUB_OVF;
5332                 break;
5333         case OP_ISUB_OVF_UN:
5334                 ins->opcode = OP_S390_ISUB_OVF_UN;
5335                 break;
5336         case OP_IADD_OVF:
5337                 ins->opcode = OP_S390_IADD_OVF;
5338                 break;
5339         case OP_IADD_OVF_UN:
5340                 ins->opcode = OP_S390_IADD_OVF_UN;
5341                 break;
5342         case OP_LADD_OVF:
5343                 ins->opcode = OP_S390_LADD_OVF;
5344                 break;
5345         case OP_LADD_OVF_UN:
5346                 ins->opcode = OP_S390_LADD_OVF_UN;
5347                 break;
5348         case OP_LSUB_OVF:
5349                 ins->opcode = OP_S390_LSUB_OVF;
5350                 break;
5351         case OP_LSUB_OVF_UN:
5352                 ins->opcode = OP_S390_LSUB_OVF_UN;
5353                 break;
5354         default:
5355                 break;
5356         }
5357 }
5358
5359 /*========================= End of Function ========================*/
5360
5361 /*------------------------------------------------------------------*/
5362 /*                                                                  */
5363 /* Name         - mono_arch_print_tree                              */
5364 /*                                                                  */
5365 /* Function     - Print platform-specific opcode details.           */
5366 /*                                                                  */
5367 /* Returns      - 1 - opcode details have been printed              */
5368 /*                0 - opcode details have not been printed          */
5369 /*                                                                  */
5370 /*------------------------------------------------------------------*/
5371
5372 gboolean
5373 mono_arch_print_tree (MonoInst *tree, int arity)
5374 {
5375         gboolean done;
5376
5377         switch (tree->opcode) {
5378                 case OP_S390_LOADARG:
5379                 case OP_S390_ARGREG:
5380                 case OP_S390_ARGPTR:
5381                         printf ("[0x%lx(%s)]", tree->inst_offset,
5382                                 mono_arch_regname (tree->inst_basereg));
5383                         done = 1;
5384                         break;
5385                 case OP_S390_STKARG:
5386                         printf ("[0x%lx(previous_frame)]",
5387                                 tree->inst_offset);
5388                         done = 1;
5389                         break;
5390                 case OP_S390_MOVE:
5391                         printf ("[0x%lx(%d,%s),0x%lx(%s)]",
5392                                 tree->inst_offset, tree->backend.size,
5393                                 mono_arch_regname(tree->dreg),
5394                                 tree->inst_imm,
5395                                 mono_arch_regname(tree->sreg1));
5396                         done = 1;
5397                         break;
5398                 case OP_S390_SETF4RET:
5399                         printf ("[f%s,f%s]",
5400                                 mono_arch_regname (tree->dreg),
5401                                 mono_arch_regname (tree->sreg1));
5402                         done = 1;
5403                         break;
5404                 case OP_TLS_GET:
5405                         printf ("[0x%lx(0x%lx,%s)]", tree->inst_offset,
5406                                 tree->inst_imm,
5407                                 mono_arch_regname (tree->sreg1));
5408                         done = 1;
5409                         break;
5410                 case OP_S390_BKCHAIN:
5411                         printf ("[previous_frame(%s)]",
5412                                 mono_arch_regname (tree->sreg1));
5413                         done = 1;
5414                 default:
5415                         done = 0;
5416         }
5417         return (done);
5418 }
5419
5420 /*========================= End of Function ========================*/
5421
5422 /*------------------------------------------------------------------*/
5423 /*                                                                  */
5424 /* Name         - mono_arch_regalloc_cost                           */
5425 /*                                                                  */
5426 /* Function     - Determine the cost, in the number of memory       */
5427 /*                references, of the action of allocating the var-  */
5428 /*                iable VMV into a register during global register  */
5429 /*                allocation.                                       */
5430 /*                                                                  */
5431 /* Returns      - Cost                                              */
5432 /*                                                                  */
5433 /*------------------------------------------------------------------*/
5434
5435 guint32
5436 mono_arch_regalloc_cost (MonoCompile *cfg, MonoMethodVar *vmv)
5437 {
5438         /* FIXME: */
5439         return 2;
5440 }
5441
5442 /*========================= End of Function ========================*/
5443
5444 /*------------------------------------------------------------------*/
5445 /*                                                                  */
5446 /* Name         - mono_arch_flush_register_windows                  */
5447 /*                                                                  */
5448 /* Function     -                                                   */
5449 /*                                                                  */
5450 /* Returns      -                                                   */
5451 /*                                                                  */
5452 /*------------------------------------------------------------------*/
5453
5454 void
5455 mono_arch_flush_register_windows (void)
5456 {
5457 }
5458
5459 /*========================= End of Function ========================*/
5460
5461 /*------------------------------------------------------------------*/
5462 /*                                                                  */
5463 /* Name         - mono_arch_is_inst_imm                             */
5464 /*                                                                  */
5465 /* Function     - Determine if operand qualifies as an immediate    */
5466 /*                value. For s390 this is a value -32768-32768      */
5467 /*                                                                  */
5468 /* Returns      - True|False - is [not] immediate value.            */
5469 /*                                                                  */
5470 /*------------------------------------------------------------------*/
5471
5472 gboolean
5473 mono_arch_is_inst_imm (gint64 imm)
5474 {
5475         return s390_is_imm32 (imm);
5476 }
5477
5478 /*========================= End of Function ========================*/
5479
5480 /*------------------------------------------------------------------*/
5481 /*                                                                  */
5482 /* Name         - mono_arch_get_patch_offset                        */
5483 /*                                                                  */
5484 /* Function     - Dummy entry point until s390x supports aot.       */
5485 /*                                                                  */
5486 /* Returns      - Offset for patch.                                 */
5487 /*                                                                  */
5488 /*------------------------------------------------------------------*/
5489
5490 guint32
5491 mono_arch_get_patch_offset (guint8 *code)
5492 {
5493         return 0;
5494 }
5495
5496 /*========================= End of Function ========================*/
5497
5498 /*------------------------------------------------------------------*/
5499 /*                                                                  */
5500 /* Name         - mono_arch_context_get_int_reg.                    */
5501 /*                                                                  */
5502 /* Function     -                                                   */
5503 /*                                                                  */
5504 /* Returns      - Return a register from the context.               */
5505 /*                                                                  */
5506 /*------------------------------------------------------------------*/
5507
5508 mgreg_t
5509 mono_arch_context_get_int_reg (MonoContext *ctx, int reg)
5510 {
5511         return ((mgreg_t) ctx->uc_mcontext.gregs[reg]);
5512 }
5513
5514 /*========================= End of Function ========================*/
5515
5516 /*------------------------------------------------------------------*/
5517 /*                                                                  */
5518 /* Name         - mono_arch_context_set_int_reg.                    */
5519 /*                                                                  */
5520 /* Function     - Set a value in a specified register.              */
5521 /*                                                                  */
5522 /*------------------------------------------------------------------*/
5523
5524 void
5525 mono_arch_context_set_int_reg (MonoContext *ctx, int reg, mgreg_t val)
5526 {
5527         ctx->uc_mcontext.gregs[reg] = val;
5528 }
5529
5530 /*========================= End of Function ========================*/
5531
5532 /*------------------------------------------------------------------*/
5533 /*                                                                  */
5534 /* Name         - mono_arch_get_this_arg_from_call.                 */
5535 /*                                                                  */
5536 /* Function     -                                                   */
5537 /*                                                                  */
5538 /*------------------------------------------------------------------*/
5539
5540 gpointer
5541 mono_arch_get_this_arg_from_call (mgreg_t *regs, guint8 *code)
5542 {
5543         MonoLMF *lmf = (MonoLMF *) ((gchar *) regs - sizeof(MonoLMF));
5544
5545         return (gpointer) lmf->gregs [s390_r2];
5546 }
5547
5548 /*========================= End of Function ========================*/
5549
5550 /*------------------------------------------------------------------*/
5551 /*                                                                  */
5552 /* Name         - mono_arch_install_handler_block_guard             */
5553 /*                                                                  */
5554 /* Function     -                                                   */
5555 /*                                                                  */
5556 /*------------------------------------------------------------------*/
5557
5558 gpointer
5559 mono_arch_install_handler_block_guard (MonoJitInfo *ji, MonoJitExceptionInfo *clause,
5560                                        MonoContext *ctx, gpointer new_value)
5561 {
5562         int offset;
5563         gpointer *sp, old_value;
5564         char *bp;
5565
5566         offset = clause->exvar_offset;
5567
5568         /*Load the spvar*/
5569         bp = MONO_CONTEXT_GET_BP (ctx);
5570         sp = *(gpointer*)(bp + offset);
5571
5572         old_value = *sp;
5573         if (old_value < ji->code_start || (char*)old_value > ((char*)ji->code_start + ji->code_size))
5574                 return old_value;
5575
5576         *sp = new_value;
5577
5578         return old_value;
5579 }
5580
5581 /*========================= End of Function ========================*/
5582
5583 /*------------------------------------------------------------------*/
5584 /*                                                                  */
5585 /* Name         - get_delegate_invoke_impl.                         */
5586 /*                                                                  */
5587 /* Function     -                                                   */
5588 /*                                                                  */
5589 /*------------------------------------------------------------------*/
5590
5591 static gpointer
5592 get_delegate_invoke_impl (gboolean has_target, guint32 param_count, guint32 *code_len, gboolean aot)
5593 {
5594         guint8 *code, *start;
5595
5596         if (has_target) {
5597                 int size = 32;
5598
5599                 start = code = mono_global_codeman_reserve (size);
5600
5601                 /* Replace the this argument with the target */
5602                 s390_lg   (code, s390_r1, 0, s390_r2, MONO_STRUCT_OFFSET (MonoDelegate, method_ptr));
5603                 s390_lg   (code, s390_r2, 0, s390_r2, MONO_STRUCT_OFFSET (MonoDelegate, target));
5604                 s390_br   (code, s390_r1);
5605                 g_assert ((code - start) <= size);
5606
5607                 mono_arch_flush_icache (start, size);
5608         } else {
5609                 int size, i;
5610
5611                 size = 32 + param_count * 8;
5612                 start = code = mono_global_codeman_reserve (size);
5613
5614                 s390_lg   (code, s390_r1, 0, s390_r2, MONO_STRUCT_OFFSET (MonoDelegate, method_ptr));
5615                 /* slide down the arguments */
5616                 for (i = 0; i < param_count; ++i) {
5617                         s390_lgr (code, (s390_r2 + i), (s390_r2 + i + 1));
5618                 }
5619                 s390_br   (code, s390_r1);
5620
5621                 g_assert ((code - start) <= size);
5622
5623                 mono_arch_flush_icache (start, size);
5624         }
5625
5626         if (code_len)
5627                 *code_len = code - start;
5628
5629         return start;
5630 }
5631
5632 /*========================= End of Function ========================*/
5633
5634 /*------------------------------------------------------------------*/
5635 /*                                                                  */
5636 /* Name         - mono_arch_get_delegate_invoke_impls.              */
5637 /*                                                                  */
5638 /* Function     -                                                   */
5639 /*                                                                  */
5640 /*------------------------------------------------------------------*/
5641
5642 GSList*
5643 mono_arch_get_delegate_invoke_impls (void)
5644 {
5645         GSList *res = NULL;
5646         guint8 *code;
5647         guint32 code_len;
5648         int i;
5649         char *tramp_name;
5650
5651         code = get_delegate_invoke_impl (TRUE, 0, &code_len, TRUE);
5652         res = g_slist_prepend (res, mono_tramp_info_create ("delegate_invoke_impl_has_target", code, code_len, NULL, NULL));
5653
5654         for (i = 0; i < MAX_ARCH_DELEGATE_PARAMS; ++i) {
5655                 code = get_delegate_invoke_impl (FALSE, i, &code_len, TRUE);
5656                 tramp_name = g_strdup_printf ("delegate_invoke_impl_target_%d", i);
5657                 res = g_slist_prepend (res, mono_tramp_info_create (tramp_name, code, code_len, NULL, NULL));
5658                 g_free (tramp_name);
5659         }
5660
5661         return res;
5662 }
5663
5664 /*========================= End of Function ========================*/
5665
5666 /*------------------------------------------------------------------*/
5667 /*                                                                  */
5668 /* Name         - mono_arch_get_delegate_invoke_impl.               */
5669 /*                                                                  */
5670 /* Function     -                                                   */
5671 /*                                                                  */
5672 /*------------------------------------------------------------------*/
5673
5674 gpointer
5675 mono_arch_get_delegate_invoke_impl (MonoMethodSignature *sig, gboolean has_target)
5676 {
5677         guint8 *code, *start;
5678
5679         /* FIXME: Support more cases */
5680         if (MONO_TYPE_ISSTRUCT (sig->ret))
5681                 return NULL;
5682
5683         if (has_target) {
5684                 static guint8* cached = NULL;
5685
5686                 if (cached)
5687                         return cached;
5688
5689                 if (mono_aot_only)
5690                         start = mono_aot_get_trampoline ("delegate_invoke_impl_has_target");
5691                 else
5692                         start = get_delegate_invoke_impl (TRUE, 0, NULL, FALSE);
5693
5694                 mono_memory_barrier ();
5695
5696                 cached = start;
5697         } else {
5698                 static guint8* cache [MAX_ARCH_DELEGATE_PARAMS + 1] = {NULL};
5699                 int i;
5700
5701                 if (sig->param_count > MAX_ARCH_DELEGATE_PARAMS)
5702                         return NULL;
5703                 for (i = 0; i < sig->param_count; ++i)
5704                         if (!mono_is_regsize_var (sig->params [i]))
5705                                 return NULL;
5706
5707
5708                 code = cache [sig->param_count];
5709                 if (code)
5710                         return code;
5711
5712                 if (mono_aot_only) {
5713                         char *name = g_strdup_printf ("delegate_invoke_impl_target_%d", sig->param_count);
5714                         start = mono_aot_get_trampoline (name);
5715                         g_free (name);
5716                 } else {
5717                         start = get_delegate_invoke_impl (FALSE, sig->param_count, NULL, FALSE);
5718                 }
5719
5720                 mono_memory_barrier ();
5721
5722                 cache [sig->param_count] = start;
5723         }
5724         return start;
5725 }
5726
5727 /*========================= End of Function ========================*/
5728
5729 /*------------------------------------------------------------------*/
5730 /*                                                                  */
5731 /* Name         - mono_arch_build_imt_thunk.                        */
5732 /*                                                                  */
5733 /* Function     -                                                   */
5734 /*                                                                  */
5735 /*------------------------------------------------------------------*/
5736
5737 gpointer
5738 mono_arch_build_imt_thunk (MonoVTable *vtable, MonoDomain *domain,
5739                            MonoIMTCheckItem **imt_entries, int count,
5740                            gpointer fail_tramp)
5741 {
5742         int i;
5743         int size = 0;
5744         guchar *code, *start;
5745
5746         for (i = 0; i < count; ++i) {
5747                 MonoIMTCheckItem *item = imt_entries [i];
5748                 if (item->is_equals) {
5749                         if (item->check_target_idx) {
5750                                 if (!item->compare_done)
5751                                         item->chunk_size += CMP_SIZE + JUMP_SIZE;
5752                                 if (item->has_target_code)
5753                                         item->chunk_size += BR_SIZE + JUMP_SIZE + LOADCON_SIZE;
5754                                 else
5755                                         item->chunk_size += BR_SIZE + JUMP_SIZE + LOADCON_SIZE +
5756                                                             LOAD_SIZE;
5757                         } else {
5758                                 if (fail_tramp) {
5759                                         item->chunk_size += CMP_SIZE + 2 * BR_SIZE + JUMP_SIZE +
5760                                                             2 * LOADCON_SIZE;
5761                                         if (!item->has_target_code)
5762                                                 item->chunk_size += LOAD_SIZE;
5763                                 } else {
5764                                         item->chunk_size += LOADCON_SIZE + LOAD_SIZE + BR_SIZE;
5765 #if ENABLE_WRONG_METHOD_CHECK
5766                                         item->chunk_size += CMP_SIZE + JUMP_SIZE;
5767 #endif
5768                                 }
5769                         }
5770                 } else {
5771                         item->chunk_size += CMP_SIZE + JUMP_SIZE;
5772                         imt_entries [item->check_target_idx]->compare_done = TRUE;
5773                 }
5774                 size += item->chunk_size;
5775         }
5776
5777         if (fail_tramp)
5778                 code = mono_method_alloc_generic_virtual_thunk (domain, size);
5779         else
5780                 code = mono_domain_code_reserve (domain, size);
5781
5782         start = code;
5783
5784         for (i = 0; i < count; ++i) {
5785                 MonoIMTCheckItem *item = imt_entries [i];
5786                 item->code_target = (guint8 *) code;
5787                 if (item->is_equals) {
5788                         if (item->check_target_idx) {
5789                                 if (!item->compare_done) {
5790                                         S390_SET  (code, s390_r0, item->key);
5791                                         s390_cgr  (code, s390_r0, MONO_ARCH_IMT_REG);
5792                                 }
5793                                 item->jmp_code = (guint8*) code;
5794                                 s390_jcl (code, S390_CC_NE, 0);
5795
5796                                 if (item->has_target_code) {
5797                                         S390_SET (code, s390_r1, item->value.target_code);
5798                                 } else {
5799                                         S390_SET (code, s390_r1, (&(vtable->vtable [item->value.vtable_slot])));
5800                                         s390_lg  (code, s390_r1, 0, s390_r1, 0);
5801                                 }
5802                                 s390_br   (code, s390_r1);
5803                         } else {
5804                                 if (fail_tramp) {
5805                                         gint64  target;
5806
5807                                         S390_SET  (code, s390_r0, item->key);
5808                                         s390_cgr  (code, s390_r0, MONO_ARCH_IMT_REG);
5809                                         item->jmp_code = (guint8*) code;
5810                                         s390_jcl  (code, S390_CC_NE, 0);
5811                                         if (item->has_target_code) {
5812                                                 S390_SET (code, s390_r1, item->value.target_code);
5813                                         } else {
5814                                                 g_assert (vtable);
5815                                                 S390_SET  (code, s390_r1,
5816                                                            (&(vtable->vtable [item->value.vtable_slot])));
5817                                                 s390_lg   (code, s390_r1, 0, s390_r1, 0);
5818                                         }
5819                                         s390_br   (code, s390_r1);
5820                                         target = S390_RELATIVE(code, item->jmp_code);
5821                                         s390_patch_rel(item->jmp_code+2, target);
5822                                         S390_SET  (code, s390_r1, fail_tramp);
5823                                         s390_br   (code, s390_r1);
5824                                         item->jmp_code = NULL;
5825                                 } else {
5826                                 /* enable the commented code to assert on wrong method */
5827 #if ENABLE_WRONG_METHOD_CHECK
5828                                         g_assert_not_reached ();
5829 #endif
5830                                         S390_SET (code, s390_r1, (&(vtable->vtable [item->value.vtable_slot])));
5831                                         s390_lg   (code, s390_r1, 0, s390_r1, 0);
5832                                         s390_br   (code, s390_r1);
5833                                 }
5834                         }
5835                 } else {
5836                         S390_SET  (code, s390_r0, item->key);
5837                         s390_cgr  (code, MONO_ARCH_IMT_REG, s390_r0);
5838                         item->jmp_code = (guint8 *) code;
5839                         s390_jcl  (code, S390_CC_GE, 0);
5840                 }
5841         }
5842         /*
5843          * patch the branches to get to the target items
5844          */
5845         for (i = 0; i < count; ++i) {
5846                 MonoIMTCheckItem *item = imt_entries [i];
5847                 if (item->jmp_code) {
5848                         if (item->check_target_idx) {
5849                                 gint64 offset;
5850                                 offset = S390_RELATIVE(imt_entries [item->check_target_idx]->code_target,
5851                                                        item->jmp_code);
5852                                 s390_patch_rel ((guchar *) item->jmp_code + 2, (guint64) offset);
5853                         }
5854                 }
5855         }
5856
5857         mono_arch_flush_icache ((guint8*)start, (code - start));
5858
5859         if (!fail_tramp)
5860                 mono_stats.imt_thunks_size += (code - start);
5861
5862         g_assert (code - start <= size);
5863
5864         return (start);
5865 }
5866
5867 /*========================= End of Function ========================*/
5868
5869 /*------------------------------------------------------------------*/
5870 /*                                                                  */
5871 /* Name         - mono_arch_find_imt_method.                        */
5872 /*                                                                  */
5873 /* Function     - Get the method address from MONO_ARCH_IMT_REG     */
5874 /*                found in the save area.                           */
5875 /*                                                                  */
5876 /*------------------------------------------------------------------*/
5877
5878 MonoMethod*
5879 mono_arch_find_imt_method (mgreg_t *regs, guint8 *code)
5880 {
5881         MonoLMF *lmf = (MonoLMF *) ((gchar *) regs - sizeof(MonoLMF));
5882
5883         return ((MonoMethod *) lmf->gregs [MONO_ARCH_IMT_REG]);
5884 }
5885
5886 /*========================= End of Function ========================*/
5887
5888 /*------------------------------------------------------------------*/
5889 /*                                                                  */
5890 /* Name         - mono_arch_find_static_call_vtable                 */
5891 /*                                                                  */
5892 /* Function     - Find the static call vtable.                      */
5893 /*                                                                  */
5894 /*------------------------------------------------------------------*/
5895
5896 MonoVTable*
5897 mono_arch_find_static_call_vtable (mgreg_t *regs, guint8 *code)
5898 {
5899         mgreg_t *r = (mgreg_t*)regs;
5900
5901         return (MonoVTable*)(gsize) r [MONO_ARCH_RGCTX_REG];
5902 }
5903
5904 /*========================= End of Function ========================*/
5905
5906 /*------------------------------------------------------------------*/
5907 /*                                                                  */
5908 /* Name         - mono_arch_get_cie_program                         */
5909 /*                                                                  */
5910 /* Function     - Find the static call vtable.                      */
5911 /*                                                                  */
5912 /*------------------------------------------------------------------*/
5913
5914 GSList*
5915 mono_arch_get_cie_program (void)
5916 {
5917         GSList *l = NULL;
5918
5919         mono_add_unwind_op_def_cfa (l, NULL, NULL, STK_BASE, 0);
5920
5921         return(l);
5922 }
5923
5924 /*========================= End of Function ========================*/
5925
5926 #ifdef MONO_ARCH_SOFT_DEBUG_SUPPORTED
5927
5928 /*------------------------------------------------------------------*/
5929 /*                                                                  */
5930 /* Name         - mono_arch_set_breakpoint.                         */
5931 /*                                                                  */
5932 /* Function     - Set a breakpoint at the native code corresponding */
5933 /*                to JI at NATIVE_OFFSET.  The location should      */
5934 /*                contain code emitted by OP_SEQ_POINT.             */
5935 /*                                                                  */
5936 /*------------------------------------------------------------------*/
5937
5938 void
5939 mono_arch_set_breakpoint (MonoJitInfo *ji, guint8 *ip)
5940 {
5941         guint8 *code = ip;
5942
5943         breakpointCode.pTrigger = bp_trigger_page;
5944         memcpy(code, (void *) &breakpointCode, BREAKPOINT_SIZE);
5945         code += BREAKPOINT_SIZE;
5946 }
5947
5948 /*========================= End of Function ========================*/
5949
5950 /*------------------------------------------------------------------*/
5951 /*                                                                  */
5952 /* Name         - mono_arch_clear_breakpoint.                       */
5953 /*                                                                  */
5954 /* Function     - Clear the breakpoint at IP.                       */
5955 /*                                                                  */
5956 /*------------------------------------------------------------------*/
5957
5958 void
5959 mono_arch_clear_breakpoint (MonoJitInfo *ji, guint8 *ip)
5960 {
5961         guint8 *code = ip;
5962         int i;
5963
5964         for (i = 0; i < (BREAKPOINT_SIZE / S390X_NOP_SIZE); i++)
5965                 s390_nop(code);
5966 }
5967
5968 /*========================= End of Function ========================*/
5969
5970 /*------------------------------------------------------------------*/
5971 /*                                                                  */
5972 /* Name         - mono_arch_is_breakpoint_event.                    */
5973 /*                                                                  */
5974 /* Function     -                                                   */
5975 /*                                                                  */
5976 /*------------------------------------------------------------------*/
5977
5978 gboolean
5979 mono_arch_is_breakpoint_event (void *info, void *sigctx)
5980 {
5981         siginfo_t* sinfo = (siginfo_t*) info;
5982
5983         /*
5984          * Sometimes the address is off by 4
5985          */
5986         if (sinfo->si_addr >= bp_trigger_page && (guint8*)sinfo->si_addr <= (guint8*)bp_trigger_page + 128)
5987                 return TRUE;
5988         else
5989                 return FALSE;
5990 }
5991
5992 /*========================= End of Function ========================*/
5993
5994 /*------------------------------------------------------------------*/
5995 /*                                                                  */
5996 /* Name         - mono_arch_skip_breakpoint.                        */
5997 /*                                                                  */
5998 /* Function     - Modify the CTX so the IP is placed after the      */
5999 /*                breakpoint instruction, so when we resume, the    */
6000 /*                instruction is not executed again.                */
6001 /*                                                                  */
6002 /*------------------------------------------------------------------*/
6003
6004 void
6005 mono_arch_skip_breakpoint (MonoContext *ctx, MonoJitInfo *ji)
6006 {
6007         MONO_CONTEXT_SET_IP (ctx, ((guint8*)MONO_CONTEXT_GET_IP (ctx) + sizeof(RXY_Format)));
6008 }
6009
6010 /*========================= End of Function ========================*/
6011
6012 /*------------------------------------------------------------------*/
6013 /*                                                                  */
6014 /* Name         - mono_arch_start_single_stepping.                  */
6015 /*                                                                  */
6016 /* Function     - Start single stepping.                            */
6017 /*                                                                  */
6018 /*------------------------------------------------------------------*/
6019
6020 void
6021 mono_arch_start_single_stepping (void)
6022 {
6023         mono_mprotect (ss_trigger_page, mono_pagesize (), 0);
6024 }
6025
6026 /*========================= End of Function ========================*/
6027
6028 /*------------------------------------------------------------------*/
6029 /*                                                                  */
6030 /* Name         - mono_arch_stop_single_stepping.                   */
6031 /*                                                                  */
6032 /* Function     - Stop single stepping.                             */
6033 /*                                                                  */
6034 /*------------------------------------------------------------------*/
6035
6036 void
6037 mono_arch_stop_single_stepping (void)
6038 {
6039         mono_mprotect (ss_trigger_page, mono_pagesize (), MONO_MMAP_READ);
6040 }
6041
6042 /*========================= End of Function ========================*/
6043
6044 /*------------------------------------------------------------------*/
6045 /*                                                                  */
6046 /* Name         - mono_arch_is_single_step_event.                   */
6047 /*                                                                  */
6048 /* Function     - Return whether the machine state in sigctx cor-   */
6049 /*                responds to a single step event.                  */
6050 /*                                                                  */
6051 /*------------------------------------------------------------------*/
6052
6053 gboolean
6054 mono_arch_is_single_step_event (void *info, void *sigctx)
6055 {
6056         siginfo_t* sinfo = (siginfo_t*) info;
6057
6058         /*
6059          * Sometimes the address is off by 4
6060          */
6061         if (sinfo->si_addr >= ss_trigger_page && (guint8*)sinfo->si_addr <= (guint8*)ss_trigger_page + 128)
6062                 return TRUE;
6063         else
6064                 return FALSE;
6065 }
6066
6067 /*========================= End of Function ========================*/
6068
6069 /*------------------------------------------------------------------*/
6070 /*                                                                  */
6071 /* Name         - mono_arch_skip_single_step.                       */
6072 /*                                                                  */
6073 /* Function     - Modify the ctx so the IP is placed after the      */
6074 /*                single step trigger instruction, so that the      */
6075 /*                instruction is not executed again.                */
6076 /*                                                                  */
6077 /*------------------------------------------------------------------*/
6078
6079 void
6080 mono_arch_skip_single_step (MonoContext *ctx)
6081 {
6082         MONO_CONTEXT_SET_IP (ctx, (guint8*)MONO_CONTEXT_GET_IP (ctx) + BREAKPOINT_SIZE);
6083 }
6084
6085 /*========================= End of Function ========================*/
6086
6087 /*------------------------------------------------------------------*/
6088 /*                                                                  */
6089 /* Name         - mono_arch_create_seq_point_info.                  */
6090 /*                                                                  */
6091 /* Function     - Return a pointer to a data struction which is     */
6092 /*                used by the sequence point implementation in      */
6093 /*                AOTed code.                                       */
6094 /*                                                                  */
6095 /*------------------------------------------------------------------*/
6096
6097 gpointer
6098 mono_arch_get_seq_point_info (MonoDomain *domain, guint8 *code)
6099 {
6100         NOT_IMPLEMENTED;
6101         return NULL;
6102 }
6103
6104 /*------------------------------------------------------------------*/
6105 /*                                                                  */
6106 /* Name         - mono_arch_init_lmf_ext.                               */
6107 /*                                                                  */
6108 /* Function -                                                       */
6109 /*                                                                  */
6110 /*------------------------------------------------------------------*/
6111
6112 void
6113 mono_arch_init_lmf_ext (MonoLMFExt *ext, gpointer prev_lmf)
6114 {
6115         ext->lmf.previous_lmf = prev_lmf;
6116         /* Mark that this is a MonoLMFExt */
6117         ext->lmf.previous_lmf = (gpointer)(((gssize)ext->lmf.previous_lmf) | 2);
6118         ext->lmf.ebp = (gssize)ext;
6119 }
6120
6121 /*========================= End of Function ========================*/
6122
6123 #endif
6124
6125 gboolean
6126 mono_arch_opcode_supported (int opcode)
6127 {
6128         switch (opcode) {
6129         case OP_ATOMIC_ADD_I4:
6130         case OP_ATOMIC_ADD_I8:
6131         case OP_ATOMIC_EXCHANGE_I4:
6132         case OP_ATOMIC_EXCHANGE_I8:
6133                 return TRUE;
6134         default:
6135                 return FALSE;
6136         }
6137 }