src/vm/jit/parse.c

   1 /* src/vm/jit/parse.c - parser for JavaVM to intermediate code translation
   2
   3    Copyright (C) 1996-2005, 2006 R. Grafl, A. Krall, C. Kruegel,
   4    C. Oates, R. Obermaisser, M. Platter, M. Probst, S. Ring,
   5    E. Steiner, C. Thalinger, D. Thuernbeck, P. Tomsich, C. Ullrich,
   6    J. Wenninger, Institut f. Computersprachen - TU Wien
   7
   8    This file is part of CACAO.
   9
  10    This program is free software; you can redistribute it and/or
  11    modify it under the terms of the GNU General Public License as
  12    published by the Free Software Foundation; either version 2, or (at
  13    your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful, but
  16    WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18    General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program; if not, write to the Free Software
  22    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  23    02110-1301, USA.
  24
  25    Contact: cacao@cacaojvm.org
  26
  27    Author: Andreas Krall
  28
  29    Changes: Carolyn Oates
  30             Edwin Steiner
  31             Joseph Wenninger
  32             Christian Thalinger
  33
  34    $Id: parse.c 5859 2006-10-29 23:33:30Z edwin $
  35
  36 */
  37
  38
  39 #include "config.h"
  40
  41 #include <assert.h>
  42 #include <string.h>
  43
  44 #include "vm/types.h"
  45
  46 #include "mm/memory.h"
  47 #include "native/native.h"
  48
  49 #if defined(ENABLE_THREADS)
  50 # include "threads/native/lock.h"
  51 #endif
  52
  53 #include "toolbox/logging.h"
  54 #include "vm/builtin.h"
  55 #include "vm/exceptions.h"
  56 #include "vm/global.h"
  57 #include "vm/linker.h"
  58 #include "vm/loader.h"
  59 #include "vm/resolve.h"
  60 #include "vm/options.h"
  61 #include "vm/statistics.h"
  62 #include "vm/stringlocal.h"
  63 #include "vm/suck.h"
  64 #include "vm/jit/asmpart.h"
  65 #include "vm/jit/jit.h"
  66 #include "vm/jit/parse.h"
  67 #include "vm/jit/patcher.h"
  68 #include "vm/jit/loop/loop.h"
  69
  70 #define INSTRUCTIONS_INCREMENT  5  /* number of additional instructions to    */
  71                                    /* allocate if space runs out              */
  72
  73
  74 /* parserdata_t ***************************************************************/
  75
  76 typedef struct parsedata_t parsedata_t;
  77
  78 struct parsedata_t {
  79         instruction *instructions;          /* instruction array                  */
  80         s4           instructionslength;    /* length of the instruction array    */
  81         u1          *instructionstart;
  82 };
  83
  84
  85 /* parse_setup *****************************************************************
  86
  87    Fills the passed parsedata_t structure.
  88
  89 *******************************************************************************/
  90
  91 static void parse_setup(jitdata *jd, parsedata_t *pd)
  92 {
  93         methodinfo *m;
  94
  95         /* get required compiler data */
  96
  97         m = jd->m;
  98
  99         /* Allocate instruction array and block index table (1 additional
 100            for end ipc). */
 101
 102         jd->basicblockindex = DMNEW(s4, m->jcodelength + 1);
 103         pd->instructionstart = DMNEW(u1, m->jcodelength + 1);
 104
 105         MZERO(jd->basicblockindex, s4, m->jcodelength + 1);
 106         MZERO(pd->instructionstart, u1, m->jcodelength + 1);
 107
 108         /* Set the length of the instruction array.  We simply add 5 more
 109            instruction, as this seems to be a reasonable value. */
 110
 111         pd->instructionslength = m->jcodelength + 1;
 112
 113         /* allocate the instruction array */
 114
 115         pd->instructions = DMNEW(instruction, pd->instructionslength);
 116
 117         /* Zero the intermediate instructions array so we don't have any
 118            invalid pointers in it if we cannot finish stack_analyse(). */
 119
 120         MZERO(pd->instructions, instruction, pd->instructionslength);
 121 }
 122
 123
 124 /* parse_realloc_instructions **************************************************
 125
 126    Reallocate the instructions array so there is room for at least N
 127    additional instructions.
 128
 129    RETURN VALUE:
 130        the new value for iptr
 131
 132 *******************************************************************************/
 133
 134 static instruction *parse_realloc_instructions(parsedata_t *pd, s4 ipc, s4 n)
 135 {
 136         /* increase the size of the instruction array */
 137
 138         pd->instructionslength += (n + INSTRUCTIONS_INCREMENT);
 139
 140         /* reallocate the array */
 141
 142         pd->instructions = DMREALLOC(pd->instructions, instruction, ipc,
 143                                                                  pd->instructionslength);
 144
 145         /* return the iptr */
 146
 147         return pd->instructions + ipc;
 148 }
 149
 150
 151 /* parse_mark_exception_boundaries *********************************************
 152
 153    Mark exception handlers and the boundaries of the handled regions as
 154    basic block boundaries.
 155
 156    IN:
 157        jd...............current jitdata
 158
 159    RETURN VALUE:
 160        >= 0.............the number of new basic blocks marked
 161            -1...............an exception has been thrown
 162
 163 *******************************************************************************/
 164
 165 static int parse_mark_exception_boundaries(jitdata *jd)
 166 {
 167         s4                   b_count;
 168         s4                   pc;
 169         s4                   i;
 170         s4                   len;
 171         raw_exception_entry *rex;
 172         methodinfo          *m;
 173
 174         m = jd->m;
 175
 176         len = m->rawexceptiontablelength;
 177
 178         if (len == 0)
 179                 return 0;
 180
 181         b_count = 0;
 182         rex = m->rawexceptiontable;
 183
 184         for (i = 0; i < len; ++i, ++rex) {
 185
 186                 /* the start of the handled region becomes a basic block start */
 187
 188                 pc = rex->startpc;
 189                 CHECK_BYTECODE_INDEX(pc);
 190                 MARK_BASICBLOCK(pc);
 191
 192                 pc = rex->endpc; /* see JVM Spec 4.7.3 */
 193                 CHECK_BYTECODE_INDEX_EXCLUSIVE(pc);
 194
 195                 /* check that the range is valid */
 196
 197 #if defined(ENABLE_VERIFIER)
 198                 if (pc <= rex->startpc) {
 199                         exceptions_throw_verifyerror(m,
 200                                 "Invalid exception handler range");
 201                         return -1;
 202                 }
 203 #endif
 204
 205                 /* end of handled region becomes a basic block boundary  */
 206                 /* (If it is the bytecode end, we'll use the special     */
 207                 /* end block that is created anyway.)                    */
 208
 209                 if (pc < m->jcodelength)
 210                         MARK_BASICBLOCK(pc);
 211
 212                 /* the start of the handler becomes a basic block start  */
 213
 214                 pc = rex->handlerpc;
 215                 CHECK_BYTECODE_INDEX(pc);
 216                 MARK_BASICBLOCK(pc);
 217         }
 218
 219         /* everything ok */
 220
 221         return b_count;
 222
 223 #if defined(ENABLE_VERIFIER)
 224 throw_invalid_bytecode_index:
 225         exceptions_throw_verifyerror(m,
 226                                                                  "Illegal bytecode index in exception table");
 227         return -1;
 228 #endif
 229 }
 230
 231
 232 /* parse_resolve_exception_table ***********************************************
 233
 234    Enter the exception handlers and their ranges, resolved to basicblock *s,
 235    in the jitdata.
 236
 237    IN:
 238        jd...............current jitdata
 239
 240    RETURN VALUE:
 241            true.............everything ok
 242            false............an exception has been thrown
 243
 244 *******************************************************************************/
 245
 246 static bool parse_resolve_exception_table(jitdata *jd)
 247 {
 248         methodinfo          *m;
 249         raw_exception_entry *rex;
 250         exception_entry     *ex;
 251         s4                   i;
 252         s4                   len;
 253         classinfo           *exclass;
 254
 255         m = jd->m;
 256
 257         len = m->rawexceptiontablelength;
 258
 259         /* common case: no handler entries */
 260
 261         if (len == 0)
 262                 return true;
 263
 264         /* allocate the exception table */
 265
 266         jd->exceptiontablelength = len;
 267         jd->exceptiontable = DMNEW(exception_entry, len + 1); /* XXX why +1? */
 268
 269         /* copy and resolve the entries */
 270
 271         ex = jd->exceptiontable;
 272         rex = m->rawexceptiontable;
 273
 274         for (i = 0; i < len; ++i, ++rex, ++ex) {
 275                 /* resolve instruction indices to basic blocks */
 276
 277                 ex->start   = BLOCK_OF(rex->startpc);
 278                 ex->end     = BLOCK_OF(rex->endpc);
 279                 ex->handler = BLOCK_OF(rex->handlerpc);
 280
 281                 /* lazily resolve the catchtype */
 282
 283                 if (rex->catchtype.any != NULL) {
 284                         if (!resolve_classref_or_classinfo(m,
 285                                                                                            rex->catchtype,
 286                                                                                            resolveLazy, true, false,
 287                                                                                            &exclass))
 288                                 return false;
 289
 290                         /* if resolved, enter the result of resolution in the table */
 291
 292                         if (exclass != NULL)
 293                                 rex->catchtype.cls = exclass;
 294                 }
 295
 296                 ex->catchtype = rex->catchtype;
 297                 ex->next = NULL;   /* set by loop analysis */
 298                 ex->down = ex + 1; /* link to next exception entry */
 299         }
 300
 301         /* terminate the ->down linked list */
 302
 303         assert(ex != jd->exceptiontable);
 304         ex[-1].down = NULL;
 305
 306         return true;
 307 }
 308
 309
 310 /*******************************************************************************
 311
 312         function 'parse' scans the JavaVM code and generates intermediate code
 313
 314         During parsing the block index table is used to store at bit pos 0
 315         a flag which marks basic block starts and at position 1 to 31 the
 316         intermediate instruction index. After parsing the block index table
 317         is scanned, for marked positions a block is generated and the block
 318         number is stored in the block index table.
 319
 320 *******************************************************************************/
 321
 322 /*** macro for checking the length of the bytecode ***/
 323
 324 #if defined(ENABLE_VERIFIER)
 325 #define CHECK_END_OF_BYTECODE(neededlength) \
 326         do { \
 327                 if ((neededlength) > m->jcodelength) \
 328                         goto throw_unexpected_end_of_bytecode; \
 329         } while (0)
 330 #else /* !ENABLE_VERIFIER */
 331 #define CHECK_END_OF_BYTECODE(neededlength)
 332 #endif /* ENABLE_VERIFIER */
 333
 334 bool parse(jitdata *jd)
 335 {
 336         methodinfo  *m;                     /* method being parsed                */
 337         codeinfo    *code;
 338         parsedata_t  pd;
 339         instruction *iptr;                  /* current ptr into instruction array */
 340         s4           ipc;                   /* intermediate instruction counter   */
 341         s4           p;                     /* java instruction counter           */
 342         s4           nextp;                 /* start of next java instruction     */
 343         s4           opcode;                /* java opcode                        */
 344         s4           i;
 345         s4           j;
 346         int  b_count;               /* basic block counter                      */
 347         int  s_count = 0;           /* stack element counter                    */
 348         bool blockend = false;      /* true if basic block end has been reached */
 349         bool iswide = false;        /* true if last instruction was a wide      */
 350         constant_classref  *cr;
 351         constant_classref  *compr;
 352         classinfo          *c;
 353         builtintable_entry *bte;
 354         constant_FMIref    *mr;
 355         methoddesc         *md;
 356         unresolved_method  *um;
 357         resolve_result_t    result;
 358         u2                  lineindex = 0;
 359         u2                  currentline = 0;
 360         u2                  linepcchange = 0;
 361         u4                  flags;
 362         basicblock         *bptr;
 363
 364         int                *local_map; /* local pointer to renaming structore     */
 365                                        /* is assigned to rd->local_map at the end */
 366         /* get required compiler data */
 367
 368         m    = jd->m;
 369         code = jd->code;
 370
 371         /* allocate buffers for local variable renaming */
 372         local_map = DMNEW(int, m->maxlocals * 5);
 373         for (i = 0; i < m->maxlocals; i++) {
 374                 local_map[i * 5 + 0] = 0;
 375                 local_map[i * 5 + 1] = 0;
 376                 local_map[i * 5 + 2] = 0;
 377                 local_map[i * 5 + 3] = 0;
 378                 local_map[i * 5 + 4] = 0;
 379         }
 380
 381         /* initialize the parse data structures */
 382
 383         parse_setup(jd, &pd);
 384
 385         /* initialize local variables */
 386
 387         iptr = pd.instructions;
 388         ipc  = 0;
 389
 390         /* mark basic block boundaries for exception table */
 391
 392         b_count = parse_mark_exception_boundaries(jd);
 393         if (b_count < 0)
 394                 return false;
 395
 396         /* initialize stack element counter */
 397
 398         s_count = 1 + m->rawexceptiontablelength;
 399
 400 #if defined(ENABLE_THREADS)
 401         if (checksync && (m->flags & ACC_SYNCHRONIZED))
 402                 jd->isleafmethod = false;
 403 #endif
 404
 405         /* setup line number info */
 406
 407         currentline = 0;
 408         linepcchange = 0;
 409
 410         if (m->linenumbercount == 0) {
 411                 lineindex = 0;
 412         }
 413         else {
 414                 linepcchange = m->linenumbers[0].start_pc;
 415         }
 416
 417         /*** LOOP OVER ALL BYTECODE INSTRUCTIONS **********************************/
 418
 419         for (p = 0; p < m->jcodelength; p = nextp) {
 420
 421                 /* mark this position as a valid instruction start */
 422
 423                 pd.instructionstart[p] = 1;
 424
 425                 /* change the current line number, if necessary */
 426
 427                 /* XXX rewrite this using pointer arithmetic */
 428
 429                 if (linepcchange == p) {
 430                         if (m->linenumbercount > lineindex) {
 431 next_linenumber:
 432                                 currentline = m->linenumbers[lineindex].line_number;
 433                                 lineindex++;
 434                                 if (lineindex < m->linenumbercount) {
 435                                         linepcchange = m->linenumbers[lineindex].start_pc;
 436                                         if (linepcchange == p)
 437                                                 goto next_linenumber;
 438                                 }
 439                         }
 440                 }
 441
 442 fetch_opcode:
 443                 /* fetch next opcode  */
 444
 445                 opcode = SUCK_BE_U1(m->jcode + p);
 446
 447                 /* some compilers put a JAVA_NOP after a blockend instruction */
 448
 449                 if (blockend && (opcode != JAVA_NOP)) {
 450                         /* start new block */
 451
 452                         MARK_BASICBLOCK(p);
 453                         blockend = false;
 454                 }
 455
 456                 /* We need a NOP as last instruction in each basic block
 457                    for basic block reordering (may be replaced with a GOTO
 458                    later). */
 459
 460                 if (jd->basicblockindex[p] & 1) {
 461                         INSTRUCTIONS_CHECK(1);
 462                         OP(ICMD_NOP);
 463                 }
 464
 465                 /* store intermediate instruction count (bit 0 mark block starts) */
 466
 467                 jd->basicblockindex[p] |= (ipc << 1);
 468
 469                 /* compute next instruction start */
 470
 471                 nextp = p + jcommandsize[opcode];
 472
 473                 CHECK_END_OF_BYTECODE(nextp);
 474
 475                 /* add stack elements produced by this instruction */
 476
 477                 s_count += stackreq[opcode];
 478
 479                 /* We check here for the space of 1 instruction in the
 480                    instruction array.  If an opcode is converted to more than
 481                    1 instruction, this is checked in the corresponding
 482                    case. */
 483
 484                 INSTRUCTIONS_CHECK(1);
 485
 486                 /* translate this bytecode instruction */
 487                 switch (opcode) {
 488
 489                 case JAVA_NOP:
 490                         break;
 491
 492                 /* pushing constants onto the stack ***********************************/
 493
 494                 case JAVA_BIPUSH:
 495                         OP_LOADCONST_I(SUCK_BE_S1(m->jcode + p + 1));
 496                         break;
 497
 498                 case JAVA_SIPUSH:
 499                         OP_LOADCONST_I(SUCK_BE_S2(m->jcode + p + 1));
 500                         break;
 501
 502                 case JAVA_LDC1:
 503                         i = SUCK_BE_U1(m->jcode + p + 1);
 504                         goto pushconstantitem;
 505
 506                 case JAVA_LDC2:
 507                 case JAVA_LDC2W:
 508                         i = SUCK_BE_U2(m->jcode + p + 1);
 509
 510                 pushconstantitem:
 511
 512 #if defined(ENABLE_VERIFIER)
 513                         if (i >= m->class->cpcount) {
 514                                 exceptions_throw_verifyerror(m,
 515                                         "Attempt to access constant outside range");
 516                                 return false;
 517                         }
 518 #endif
 519
 520                         switch (m->class->cptags[i]) {
 521                         case CONSTANT_Integer:
 522                                 OP_LOADCONST_I(((constant_integer *) (m->class->cpinfos[i]))->value);
 523                                 break;
 524                         case CONSTANT_Long:
 525                                 OP_LOADCONST_L(((constant_long *) (m->class->cpinfos[i]))->value);
 526                                 break;
 527                         case CONSTANT_Float:
 528                                 OP_LOADCONST_F(((constant_float *) (m->class->cpinfos[i]))->value);
 529                                 break;
 530                         case CONSTANT_Double:
 531                                 OP_LOADCONST_D(((constant_double *) (m->class->cpinfos[i]))->value);
 532                                 break;
 533                         case CONSTANT_String:
 534                                 OP_LOADCONST_STRING(literalstring_new((utf *) (m->class->cpinfos[i])));
 535                                 break;
 536                         case CONSTANT_Class:
 537                                 cr = (constant_classref *) (m->class->cpinfos[i]);
 538
 539                                 if (!resolve_classref(m, cr, resolveLazy, true, true, &c))
 540                                         return false;
 541
 542                                 /* if not resolved, c == NULL */
 543
 544                                 OP_LOADCONST_CLASSINFO_OR_CLASSREF_CHECK(c, cr);
 545
 546                                 break;
 547
 548 #if defined(ENABLE_VERIFIER)
 549                         default:
 550                                 exceptions_throw_verifyerror(m,
 551                                                 "Invalid constant type to push");
 552                                 return false;
 553 #endif
 554                         }
 555                         break;
 556
 557                 case JAVA_ACONST_NULL:
 558                         OP_LOADCONST_NULL();
 559                         break;
 560
 561                 case JAVA_ICONST_M1:
 562                 case JAVA_ICONST_0:
 563                 case JAVA_ICONST_1:
 564                 case JAVA_ICONST_2:
 565                 case JAVA_ICONST_3:
 566                 case JAVA_ICONST_4:
 567                 case JAVA_ICONST_5:
 568                         OP_LOADCONST_I(opcode - JAVA_ICONST_0);
 569                         break;
 570
 571                 case JAVA_LCONST_0:
 572                 case JAVA_LCONST_1:
 573                         OP_LOADCONST_L(opcode - JAVA_LCONST_0);
 574                         break;
 575
 576                 case JAVA_FCONST_0:
 577                 case JAVA_FCONST_1:
 578                 case JAVA_FCONST_2:
 579                         OP_LOADCONST_F(opcode - JAVA_FCONST_0);
 580                         break;
 581
 582                 case JAVA_DCONST_0:
 583                 case JAVA_DCONST_1:
 584                         OP_LOADCONST_D(opcode - JAVA_DCONST_0);
 585                         break;
 586
 587                 /* stack operations ***************************************************/
 588
 589                 /* We need space for additional ICMDs so we can translate these       */
 590                 /* instructions to sequences of ICMD_COPY and ICMD_MOVE instructions. */
 591
 592                 case JAVA_DUP_X1:
 593                         INSTRUCTIONS_CHECK(4);
 594                         OP(opcode);
 595                         OP(ICMD_NOP);
 596                         OP(ICMD_NOP);
 597                         OP(ICMD_NOP);
 598                         break;
 599
 600                 case JAVA_DUP_X2:
 601                         INSTRUCTIONS_CHECK(6);
 602                         OP(opcode);
 603                         OP(ICMD_NOP);
 604                         OP(ICMD_NOP);
 605                         OP(ICMD_NOP);
 606                         OP(ICMD_NOP);
 607                         OP(ICMD_NOP);
 608                         break;
 609
 610                 case JAVA_DUP2:
 611                         INSTRUCTIONS_CHECK(2);
 612                         OP(opcode);
 613                         OP(ICMD_NOP);
 614                         break;
 615
 616                 case JAVA_DUP2_X1:
 617                         INSTRUCTIONS_CHECK(7);
 618                         OP(opcode);
 619                         OP(ICMD_NOP);
 620                         OP(ICMD_NOP);
 621                         OP(ICMD_NOP);
 622                         OP(ICMD_NOP);
 623                         OP(ICMD_NOP);
 624                         OP(ICMD_NOP);
 625                         break;
 626
 627                 case JAVA_DUP2_X2:
 628                         INSTRUCTIONS_CHECK(9);
 629                         OP(opcode);
 630                         OP(ICMD_NOP);
 631                         OP(ICMD_NOP);
 632                         OP(ICMD_NOP);
 633                         OP(ICMD_NOP);
 634                         OP(ICMD_NOP);
 635                         OP(ICMD_NOP);
 636                         OP(ICMD_NOP);
 637                         OP(ICMD_NOP);
 638                         break;
 639
 640                 case JAVA_SWAP:
 641                         INSTRUCTIONS_CHECK(3);
 642                         OP(opcode);
 643                         OP(ICMD_NOP);
 644                         OP(ICMD_NOP);
 645                         break;
 646
 647                 /* local variable access instructions *********************************/
 648
 649                 case JAVA_ILOAD:
 650                 case JAVA_FLOAD:
 651                 case JAVA_ALOAD:
 652                         if (iswide == false) {
 653                                 i = SUCK_BE_U1(m->jcode + p + 1);
 654                         }
 655                         else {
 656                                 i = SUCK_BE_U2(m->jcode + p + 1);
 657                                 nextp = p + 3;
 658                                 iswide = false;
 659                         }
 660                         OP_LOAD_ONEWORD(opcode, i, opcode - JAVA_ILOAD);
 661                         break;
 662
 663                 case JAVA_LLOAD:
 664                 case JAVA_DLOAD:
 665                         if (iswide == false) {
 666                                 i = SUCK_BE_U1(m->jcode + p + 1);
 667                         }
 668                         else {
 669                                 i = SUCK_BE_U2(m->jcode + p + 1);
 670                                 nextp = p + 3;
 671                                 iswide = false;
 672                         }
 673                         OP_LOAD_TWOWORD(opcode, i, opcode - JAVA_ILOAD);
 674                         break;
 675
 676                 case JAVA_ILOAD_0:
 677                 case JAVA_ILOAD_1:
 678                 case JAVA_ILOAD_2:
 679                 case JAVA_ILOAD_3:
 680                         OP_LOAD_ONEWORD(ICMD_ILOAD, opcode - JAVA_ILOAD_0, TYPE_INT);
 681                         break;
 682
 683                 case JAVA_LLOAD_0:
 684                 case JAVA_LLOAD_1:
 685                 case JAVA_LLOAD_2:
 686                 case JAVA_LLOAD_3:
 687                         OP_LOAD_TWOWORD(ICMD_LLOAD, opcode - JAVA_LLOAD_0, TYPE_LNG);
 688                         break;
 689
 690                 case JAVA_FLOAD_0:
 691                 case JAVA_FLOAD_1:
 692                 case JAVA_FLOAD_2:
 693                 case JAVA_FLOAD_3:
 694                         OP_LOAD_ONEWORD(ICMD_FLOAD, opcode - JAVA_FLOAD_0, TYPE_FLT);
 695                         break;
 696
 697                 case JAVA_DLOAD_0:
 698                 case JAVA_DLOAD_1:
 699                 case JAVA_DLOAD_2:
 700                 case JAVA_DLOAD_3:
 701                         OP_LOAD_TWOWORD(ICMD_DLOAD, opcode - JAVA_DLOAD_0, TYPE_DBL);
 702                         break;
 703
 704                 case JAVA_ALOAD_0:
 705                 case JAVA_ALOAD_1:
 706                 case JAVA_ALOAD_2:
 707                 case JAVA_ALOAD_3:
 708                         OP_LOAD_ONEWORD(ICMD_ALOAD, opcode - JAVA_ALOAD_0, TYPE_ADR);
 709                         break;
 710
 711                 case JAVA_ISTORE:
 712                 case JAVA_FSTORE:
 713                 case JAVA_ASTORE:
 714                         if (iswide == false) {
 715                                 i = SUCK_BE_U1(m->jcode + p + 1);
 716                         }
 717                         else {
 718                                 i = SUCK_BE_U2(m->jcode + p + 1);
 719                                 iswide = false;
 720                                 nextp = p + 3;
 721                         }
 722                         OP_STORE_ONEWORD(opcode, i, opcode - JAVA_ISTORE);
 723                         break;
 724
 725                 case JAVA_LSTORE:
 726                 case JAVA_DSTORE:
 727                         if (iswide == false) {
 728                                 i = SUCK_BE_U1(m->jcode + p + 1);
 729                         }
 730                         else {
 731                                 i = SUCK_BE_U2(m->jcode + p + 1);
 732                                 iswide = false;
 733                                 nextp = p + 3;
 734                         }
 735                         OP_STORE_TWOWORD(opcode, i, opcode - JAVA_ISTORE);
 736                         break;
 737
 738                 case JAVA_ISTORE_0:
 739                 case JAVA_ISTORE_1:
 740                 case JAVA_ISTORE_2:
 741                 case JAVA_ISTORE_3:
 742                         OP_STORE_ONEWORD(ICMD_ISTORE, opcode - JAVA_ISTORE_0, TYPE_INT);
 743                         break;
 744
 745                 case JAVA_LSTORE_0:
 746                 case JAVA_LSTORE_1:
 747                 case JAVA_LSTORE_2:
 748                 case JAVA_LSTORE_3:
 749                         OP_STORE_TWOWORD(ICMD_LSTORE, opcode - JAVA_LSTORE_0, TYPE_LNG);
 750                         break;
 751
 752                 case JAVA_FSTORE_0:
 753                 case JAVA_FSTORE_1:
 754                 case JAVA_FSTORE_2:
 755                 case JAVA_FSTORE_3:
 756                         OP_STORE_ONEWORD(ICMD_FSTORE, opcode - JAVA_FSTORE_0, TYPE_FLT);
 757                         break;
 758
 759                 case JAVA_DSTORE_0:
 760                 case JAVA_DSTORE_1:
 761                 case JAVA_DSTORE_2:
 762                 case JAVA_DSTORE_3:
 763                         OP_STORE_TWOWORD(ICMD_DSTORE, opcode - JAVA_DSTORE_0, TYPE_DBL);
 764                         break;
 765
 766                 case JAVA_ASTORE_0:
 767                 case JAVA_ASTORE_1:
 768                 case JAVA_ASTORE_2:
 769                 case JAVA_ASTORE_3:
 770                         OP_STORE_ONEWORD(ICMD_ASTORE, opcode - JAVA_ASTORE_0, TYPE_ADR);
 771                         break;
 772
 773                 case JAVA_IINC:
 774                         {
 775                                 int v;
 776
 777                                 if (iswide == false) {
 778                                         i = SUCK_BE_U1(m->jcode + p + 1);
 779                                         v = SUCK_BE_S1(m->jcode + p + 2);
 780
 781                                 }
 782                                 else {
 783                                         i = SUCK_BE_U2(m->jcode + p + 1);
 784                                         v = SUCK_BE_S2(m->jcode + p + 3);
 785                                         iswide = false;
 786                                         nextp = p + 5;
 787                                 }
 788                                 INDEX_ONEWORD(i);
 789                                 LOCALTYPE_USED(i, TYPE_INT);
 790                                 OP_LOCALINDEX_I(opcode, i, v);
 791                         }
 792                         break;
 793
 794                 /* wider index for loading, storing and incrementing ******************/
 795
 796                 case JAVA_WIDE:
 797                         iswide = true;
 798                         p++;
 799                         goto fetch_opcode;
 800
 801                 /* managing arrays ****************************************************/
 802
 803                 case JAVA_NEWARRAY:
 804                         switch (SUCK_BE_S1(m->jcode + p + 1)) {
 805                         case 4:
 806                                 bte = builtintable_get_internal(BUILTIN_newarray_boolean);
 807                                 break;
 808                         case 5:
 809                                 bte = builtintable_get_internal(BUILTIN_newarray_char);
 810                                 break;
 811                         case 6:
 812                                 bte = builtintable_get_internal(BUILTIN_newarray_float);
 813                                 break;
 814                         case 7:
 815                                 bte = builtintable_get_internal(BUILTIN_newarray_double);
 816                                 break;
 817                         case 8:
 818                                 bte = builtintable_get_internal(BUILTIN_newarray_byte);
 819                                 break;
 820                         case 9:
 821                                 bte = builtintable_get_internal(BUILTIN_newarray_short);
 822                                 break;
 823                         case 10:
 824                                 bte = builtintable_get_internal(BUILTIN_newarray_int);
 825                                 break;
 826                         case 11:
 827                                 bte = builtintable_get_internal(BUILTIN_newarray_long);
 828                                 break;
 829 #if defined(ENABLE_VERIFIER)
 830                         default:
 831                                 exceptions_throw_verifyerror(m, "Invalid array-type to create");
 832                                 return false;
 833 #endif
 834                         }
 835                         OP_BUILTIN_CHECK_EXCEPTION(bte);
 836                         break;
 837
 838                 case JAVA_ANEWARRAY:
 839                         i = SUCK_BE_U2(m->jcode + p + 1);
 840                         compr = (constant_classref *) class_getconstant(m->class, i, CONSTANT_Class);
 841                         if (!compr)
 842                                 return false;
 843
 844                         if (!(cr = class_get_classref_multiarray_of(1, compr)))
 845                                 return false;
 846
 847                         if (!resolve_classref(m, cr, resolveLazy, true, true, &c))
 848                                 return false;
 849
 850                         INSTRUCTIONS_CHECK(2);
 851                         OP_LOADCONST_CLASSINFO_OR_CLASSREF_NOCHECK(c, cr);
 852                         bte = builtintable_get_internal(BUILTIN_newarray);
 853                         OP_BUILTIN_CHECK_EXCEPTION(bte);
 854                         s_count++;
 855                         break;
 856
 857                 case JAVA_MULTIANEWARRAY:
 858                         jd->isleafmethod = false;
 859                         i = SUCK_BE_U2(m->jcode + p + 1);
 860                         j = SUCK_BE_U1(m->jcode + p + 3);
 861
 862                         cr = (constant_classref *) class_getconstant(m->class, i, CONSTANT_Class);
 863                         if (cr == NULL)
 864                                 return false;
 865
 866                         if (!resolve_classref(m, cr, resolveLazy, true, true, &c))
 867                                 return false;
 868
 869                         /* if unresolved, c == NULL */
 870
 871                         iptr->s1.argcount = j;
 872                         OP_S3_CLASSINFO_OR_CLASSREF(opcode, c, cr, 0 /* flags */);
 873                         break;
 874
 875                 /* control flow instructions ******************************************/
 876
 877                 case JAVA_IFEQ:
 878                 case JAVA_IFLT:
 879                 case JAVA_IFLE:
 880                 case JAVA_IFNE:
 881                 case JAVA_IFGT:
 882                 case JAVA_IFGE:
 883                 case JAVA_IFNULL:
 884                 case JAVA_IFNONNULL:
 885                 case JAVA_IF_ICMPEQ:
 886                 case JAVA_IF_ICMPNE:
 887                 case JAVA_IF_ICMPLT:
 888                 case JAVA_IF_ICMPGT:
 889                 case JAVA_IF_ICMPLE:
 890                 case JAVA_IF_ICMPGE:
 891                 case JAVA_IF_ACMPEQ:
 892                 case JAVA_IF_ACMPNE:
 893                 case JAVA_GOTO:
 894                         i = p + SUCK_BE_S2(m->jcode + p + 1);
 895                         CHECK_BYTECODE_INDEX(i);
 896                         MARK_BASICBLOCK(i);
 897                         blockend = true;
 898                         OP_INSINDEX(opcode, i);
 899                         break;
 900
 901                 case JAVA_GOTO_W:
 902                         i = p + SUCK_BE_S4(m->jcode + p + 1);
 903                         CHECK_BYTECODE_INDEX(i);
 904                         MARK_BASICBLOCK(i);
 905                         blockend = true;
 906                         OP_INSINDEX(opcode, i);
 907                         break;
 908
 909                 case JAVA_JSR:
 910                         i = p + SUCK_BE_S2(m->jcode + p + 1);
 911 jsr_tail:
 912                         CHECK_BYTECODE_INDEX(i);
 913                         MARK_BASICBLOCK(i);
 914                         blockend = true;
 915                         OP_PREPARE_ZEROFLAGS(JAVA_JSR);
 916                         iptr->sx.s23.s3.jsrtarget.insindex = i;
 917                         PINC;
 918                         break;
 919
 920                 case JAVA_JSR_W:
 921                         i = p + SUCK_BE_S4(m->jcode + p + 1);
 922                         goto jsr_tail;
 923
 924                 case JAVA_RET:
 925                         if (iswide == false) {
 926                                 i = SUCK_BE_U1(m->jcode + p + 1);
 927                         }
 928                         else {
 929                                 i = SUCK_BE_U2(m->jcode + p + 1);
 930                                 nextp = p + 3;
 931                                 iswide = false;
 932                         }
 933                         blockend = true;
 934
 935                         OP_LOAD_ONEWORD(opcode, i, TYPE_ADR);
 936                         break;
 937
 938                 case JAVA_IRETURN:
 939                 case JAVA_LRETURN:
 940                 case JAVA_FRETURN:
 941                 case JAVA_DRETURN:
 942                 case JAVA_ARETURN:
 943                 case JAVA_RETURN:
 944                         blockend = true;
 945                         /* XXX ARETURN will need a flag in the typechecker */
 946                         OP(opcode);
 947                         break;
 948
 949                 case JAVA_ATHROW:
 950                         blockend = true;
 951                         /* XXX ATHROW will need a flag in the typechecker */
 952                         OP(opcode);
 953                         break;
 954
 955
 956                 /* table jumps ********************************************************/
 957
 958                 case JAVA_LOOKUPSWITCH:
 959                         {
 960                                 s4 num, j;
 961                                 lookup_target_t *lookup;
 962 #if defined(ENABLE_VERIFIER)
 963                                 s4 prevvalue = 0;
 964 #endif
 965                                 blockend = true;
 966                                 nextp = ALIGN((p + 1), 4);
 967
 968                                 CHECK_END_OF_BYTECODE(nextp + 8);
 969
 970                                 OP_PREPARE_ZEROFLAGS(opcode);
 971
 972                                 /* default target */
 973
 974                                 j = p + SUCK_BE_S4(m->jcode + nextp);
 975                                 iptr->sx.s23.s3.lookupdefault.insindex = j;
 976                                 nextp += 4;
 977                                 CHECK_BYTECODE_INDEX(j);
 978                                 MARK_BASICBLOCK(j);
 979
 980                                 /* number of pairs */
 981
 982                                 num = SUCK_BE_U4(m->jcode + nextp);
 983                                 iptr->sx.s23.s2.lookupcount = num;
 984                                 nextp += 4;
 985
 986                                 /* allocate the intermediate code table */
 987
 988                                 lookup = DMNEW(lookup_target_t, num);
 989                                 iptr->dst.lookup = lookup;
 990
 991                                 /* iterate over the lookup table */
 992
 993                                 CHECK_END_OF_BYTECODE(nextp + 8 * num);
 994
 995                                 for (i = 0; i < num; i++) {
 996                                         /* value */
 997
 998                                         j = SUCK_BE_S4(m->jcode + nextp);
 999                                         lookup->value = j;
1000
1001                                         nextp += 4;
1002
1003 #if defined(ENABLE_VERIFIER)
1004                                         /* check if the lookup table is sorted correctly */
1005
1006                                         if (i && (j <= prevvalue)) {
1007                                                 exceptions_throw_verifyerror(m, "Unsorted lookup switch");
1008                                                 return false;
1009                                         }
1010                                         prevvalue = j;
1011 #endif
1012                                         /* target */
1013
1014                                         j = p + SUCK_BE_S4(m->jcode + nextp);
1015                                         lookup->target.insindex = j;
1016                                         lookup++;
1017                                         nextp += 4;
1018                                         CHECK_BYTECODE_INDEX(j);
1019                                         MARK_BASICBLOCK(j);
1020                                 }
1021
1022                                 PINC;
1023                                 break;
1024                         }
1025
1026
1027                 case JAVA_TABLESWITCH:
1028                         {
1029                                 s4 num, j;
1030                                 s4 deftarget;
1031                                 branch_target_t *table;
1032
1033                                 blockend = true;
1034                                 nextp = ALIGN((p + 1), 4);
1035
1036                                 CHECK_END_OF_BYTECODE(nextp + 12);
1037
1038                                 OP_PREPARE_ZEROFLAGS(opcode);
1039
1040                                 /* default target */
1041
1042                                 deftarget = p + SUCK_BE_S4(m->jcode + nextp);
1043                                 nextp += 4;
1044                                 CHECK_BYTECODE_INDEX(deftarget);
1045                                 MARK_BASICBLOCK(deftarget);
1046
1047                                 /* lower bound */
1048
1049                                 j = SUCK_BE_S4(m->jcode + nextp);
1050                                 iptr->sx.s23.s2.tablelow = j;
1051                                 nextp += 4;
1052
1053                                 /* upper bound */
1054
1055                                 num = SUCK_BE_S4(m->jcode + nextp);
1056                                 iptr->sx.s23.s3.tablehigh = num;
1057                                 nextp += 4;
1058
1059                                 /* calculate the number of table entries */
1060
1061                                 num = num - j + 1;
1062
1063 #if defined(ENABLE_VERIFIER)
1064                                 if (num < 1) {
1065                                         exceptions_throw_verifyerror(m,
1066                                                         "invalid TABLESWITCH: upper bound < lower bound");
1067                                         return false;
1068                                 }
1069 #endif
1070                                 /* create the intermediate code table */
1071                                 /* the first entry is the default target */
1072
1073                                 table = DMNEW(branch_target_t, 1 + num);
1074                                 iptr->dst.table = table;
1075                                 (table++)->insindex = deftarget;
1076
1077                                 /* iterate over the target table */
1078
1079                                 CHECK_END_OF_BYTECODE(nextp + 4 * num);
1080
1081                                 for (i = 0; i < num; i++) {
1082                                         j = p + SUCK_BE_S4(m->jcode + nextp);
1083                                         (table++)->insindex = j;
1084                                         nextp += 4;
1085                                         CHECK_BYTECODE_INDEX(j);
1086                                         MARK_BASICBLOCK(j);
1087                                 }
1088
1089                                 PINC;
1090                                 break;
1091                         }
1092
1093
1094                 /* load and store of object fields ************************************/
1095
1096                 case JAVA_AASTORE:
1097                         OP(opcode);
1098                         jd->isleafmethod = false;
1099                         break;
1100
1101                 case JAVA_GETSTATIC:
1102                 case JAVA_PUTSTATIC:
1103                 case JAVA_GETFIELD:
1104                 case JAVA_PUTFIELD:
1105                         {
1106                                 constant_FMIref  *fr;
1107                                 unresolved_field *uf;
1108
1109                                 i = SUCK_BE_U2(m->jcode + p + 1);
1110                                 fr = class_getconstant(m->class, i, CONSTANT_Fieldref);
1111                                 if (!fr)
1112                                         return false;
1113
1114                                 OP_PREPARE_ZEROFLAGS(opcode);
1115                                 iptr->sx.s23.s3.fmiref = fr;
1116
1117                                 /* only with -noverify, otherwise the typechecker does this */
1118
1119 #if defined(ENABLE_VERIFIER)
1120                                 if (!JITDATA_HAS_FLAG_VERIFY(jd)) {
1121 #endif
1122                                         result = resolve_field_lazy(m, fr);
1123                                         if (result == resolveFailed)
1124                                                 return false;
1125
1126                                         if (result != resolveSucceeded) {
1127                                                 uf = resolve_create_unresolved_field(m->class, m, iptr);
1128
1129                                                 if (uf == NULL)
1130                                                         return false;
1131
1132                                                 /* store the unresolved_field pointer */
1133
1134                                                 iptr->sx.s23.s3.uf = uf;
1135                                                 iptr->flags.bits = INS_FLAG_UNRESOLVED;
1136                                         }
1137 #if defined(ENABLE_VERIFIER)
1138                                 }
1139 #endif
1140                                 PINC;
1141                         }
1142                         break;
1143
1144
1145                 /* method invocation **************************************************/
1146
1147                 case JAVA_INVOKESTATIC:
1148                         i = SUCK_BE_U2(m->jcode + p + 1);
1149                         mr = class_getconstant(m->class, i, CONSTANT_Methodref);
1150
1151                         if (mr == NULL)
1152                                 return false;
1153
1154                         md = mr->parseddesc.md;
1155
1156                         if (md->params == NULL)
1157                                 if (!descriptor_params_from_paramtypes(md, ACC_STATIC))
1158                                         return false;
1159
1160                         goto invoke_method;
1161
1162                 case JAVA_INVOKEINTERFACE:
1163                         i = SUCK_BE_U2(m->jcode + p + 1);
1164
1165                         mr = class_getconstant(m->class, i, CONSTANT_InterfaceMethodref);
1166
1167                         goto invoke_nonstatic_method;
1168
1169                 case JAVA_INVOKESPECIAL:
1170                 case JAVA_INVOKEVIRTUAL:
1171                         i = SUCK_BE_U2(m->jcode + p + 1);
1172                         mr = class_getconstant(m->class, i, CONSTANT_Methodref);
1173
1174 invoke_nonstatic_method:
1175                         if (mr == NULL)
1176                                 return false;
1177
1178                         md = mr->parseddesc.md;
1179
1180                         if (md->params == NULL)
1181                                 if (!descriptor_params_from_paramtypes(md, 0))
1182                                         return false;
1183
1184 invoke_method:
1185                         jd->isleafmethod = false;
1186
1187                         OP_PREPARE_ZEROFLAGS(opcode);
1188                         iptr->sx.s23.s3.fmiref = mr;
1189
1190                         /* only with -noverify, otherwise the typechecker does this */
1191
1192 #if defined(ENABLE_VERIFIER)
1193                         if (!JITDATA_HAS_FLAG_VERIFY(jd)) {
1194 #endif
1195                                 result = resolve_method_lazy(m, mr,
1196                                                 (opcode == JAVA_INVOKESPECIAL));
1197                                 if (result == resolveFailed)
1198                                         return false;
1199
1200                                 if (result == resolveSucceeded) {
1201                                         methodinfo *mi = iptr->sx.s23.s3.fmiref->p.method;
1202
1203                                         /* if this call is monomorphic, turn it into an INVOKESPECIAL */
1204
1205                                         assert(IS_FMIREF_RESOLVED(iptr->sx.s23.s3.fmiref));
1206
1207                                         if ((iptr->opc == ICMD_INVOKEVIRTUAL)
1208                                                 && (mi->flags & (ACC_FINAL | ACC_PRIVATE)))
1209                                         {
1210                                                 iptr->opc = ICMD_INVOKESPECIAL;
1211                                         }
1212                                 }
1213                                 else {
1214                                         um = resolve_create_unresolved_method(m->class, m, mr,
1215                                                         (opcode == JAVA_INVOKESTATIC),
1216                                                         (opcode == JAVA_INVOKESPECIAL));
1217
1218                                         if (!um)
1219                                                 return false;
1220
1221                                         /* store the unresolved_method pointer */
1222
1223                                         iptr->sx.s23.s3.um = um;
1224                                         iptr->flags.bits = INS_FLAG_UNRESOLVED;
1225                                 }
1226 #if defined(ENABLE_VERIFIER)
1227                         }
1228 #endif
1229                         PINC;
1230                         break;
1231
1232                 /* instructions taking class arguments ********************************/
1233
1234                 case JAVA_NEW:
1235                         i = SUCK_BE_U2(m->jcode + p + 1);
1236                         cr = (constant_classref *) class_getconstant(m->class, i, CONSTANT_Class);
1237                         if (!cr)
1238                                 return false;
1239
1240                         if (!resolve_classref(m, cr, resolveLazy, true, true, &c))
1241                                 return false;
1242
1243                         INSTRUCTIONS_CHECK(2);
1244                         OP_LOADCONST_CLASSINFO_OR_CLASSREF_NOCHECK(c, cr);
1245                         bte = builtintable_get_internal(BUILTIN_new);
1246                         OP_BUILTIN_CHECK_EXCEPTION(bte);
1247                         s_count++;
1248                         break;
1249
1250                 case JAVA_CHECKCAST:
1251                         i = SUCK_BE_U2(m->jcode + p + 1);
1252                         cr = (constant_classref *) class_getconstant(m->class, i, CONSTANT_Class);
1253                         if (cr == NULL)
1254                                 return false;
1255
1256                         if (!resolve_classref(m, cr, resolveLazy, true, true, &c))
1257                                 return false;
1258
1259                         if (cr->name->text[0] == '[') {
1260                                 /* array type cast-check */
1261                                 flags = INS_FLAG_ARRAY;
1262                                 jd->isleafmethod = false;
1263                         }
1264                         else {
1265                                 /* object type cast-check */
1266                                 flags = 0;
1267                         }
1268                         OP_S3_CLASSINFO_OR_CLASSREF(opcode, c, cr, flags);
1269                         break;
1270
1271                 case JAVA_INSTANCEOF:
1272                         i = SUCK_BE_U2(m->jcode + p + 1);
1273                         cr = (constant_classref *) class_getconstant(m->class, i, CONSTANT_Class);
1274                         if (cr == NULL)
1275                                 return false;
1276
1277                         if (!resolve_classref(m, cr, resolveLazy, true, true, &c))
1278                                 return false;
1279
1280                         if (cr->name->text[0] == '[') {
1281                                 /* array type cast-check */
1282                                 INSTRUCTIONS_CHECK(2);
1283                                 OP_LOADCONST_CLASSINFO_OR_CLASSREF_NOCHECK(c, cr);
1284                                 bte = builtintable_get_internal(BUILTIN_arrayinstanceof);
1285                                 OP_BUILTIN_NO_EXCEPTION(bte);
1286                                 s_count++;
1287                         }
1288                         else {
1289                                 /* object type cast-check */
1290                                 OP_S3_CLASSINFO_OR_CLASSREF(opcode, c, cr, 0 /* flags*/);
1291                         }
1292                         break;
1293
1294                 /* synchronization instructions ***************************************/
1295
1296                 case JAVA_MONITORENTER:
1297 #if defined(ENABLE_THREADS)
1298                         if (checksync) {
1299                                 bte = builtintable_get_internal(LOCK_monitor_enter);
1300                                 OP_BUILTIN_CHECK_EXCEPTION(bte);
1301                         }
1302                         else
1303 #endif
1304                         {
1305                                 OP(ICMD_CHECKNULL_POP);
1306                         }
1307                         break;
1308
1309                 case JAVA_MONITOREXIT:
1310 #if defined(ENABLE_THREADS)
1311                         if (checksync) {
1312                                 bte = builtintable_get_internal(LOCK_monitor_exit);
1313                                 OP_BUILTIN_CHECK_EXCEPTION(bte);
1314                         }
1315                         else
1316 #endif
1317                         {
1318                                 OP(ICMD_CHECKNULL_POP);
1319                         }
1320                         break;
1321
1322                 /* arithmetic instructions that may become builtin functions **********/
1323
1324                 case JAVA_IDIV:
1325 #if !SUPPORT_DIVISION
1326                         bte = builtintable_get_internal(BUILTIN_idiv);
1327                         OP_BUILTIN_ARITHMETIC(opcode, bte);
1328 #else
1329                         OP(opcode);
1330 #endif
1331                         break;
1332
1333                 case JAVA_IREM:
1334 #if !SUPPORT_DIVISION
1335                         bte = builtintable_get_internal(BUILTIN_irem);
1336                         OP_BUILTIN_ARITHMETIC(opcode, bte);
1337 #else
1338                         OP(opcode);
1339 #endif
1340                         break;
1341
1342                 case JAVA_LDIV:
1343 #if !(SUPPORT_DIVISION && SUPPORT_LONG && SUPPORT_LONG_DIV)
1344                         bte = builtintable_get_internal(BUILTIN_ldiv);
1345                         OP_BUILTIN_ARITHMETIC(opcode, bte);
1346 #else
1347                         OP(opcode);
1348 #endif
1349                         break;
1350
1351                 case JAVA_LREM:
1352 #if !(SUPPORT_DIVISION && SUPPORT_LONG && SUPPORT_LONG_DIV)
1353                         bte = builtintable_get_internal(BUILTIN_lrem);
1354                         OP_BUILTIN_ARITHMETIC(opcode, bte);
1355 #else
1356                         OP(opcode);
1357 #endif
1358                         break;
1359
1360                 case JAVA_FREM:
1361 #if defined(__I386__)
1362                         OP(opcode);
1363 #else
1364                         bte = builtintable_get_internal(BUILTIN_frem);
1365                         OP_BUILTIN_NO_EXCEPTION(bte);
1366 #endif
1367                         break;
1368
1369                 case JAVA_DREM:
1370 #if defined(__I386__)
1371                         OP(opcode);
1372 #else
1373                         bte = builtintable_get_internal(BUILTIN_drem);
1374                         OP_BUILTIN_NO_EXCEPTION(bte);
1375 #endif
1376                         break;
1377
1378                 case JAVA_F2I:
1379 #if defined(__ALPHA__)
1380                         if (!opt_noieee) {
1381                                 bte = builtintable_get_internal(BUILTIN_f2i);
1382                                 OP_BUILTIN_NO_EXCEPTION(bte);
1383                         }
1384                         else
1385 #endif
1386                         {
1387                                 OP(opcode);
1388                         }
1389                         break;
1390
1391                 case JAVA_F2L:
1392 #if defined(__ALPHA__)
1393                         if (!opt_noieee) {
1394                                 bte = builtintable_get_internal(BUILTIN_f2l);
1395                                 OP_BUILTIN_NO_EXCEPTION(bte);
1396                         }
1397                         else
1398 #endif
1399                         {
1400                                 OP(opcode);
1401                         }
1402                         break;
1403
1404                 case JAVA_D2I:
1405 #if defined(__ALPHA__)
1406                         if (!opt_noieee) {
1407                                 bte = builtintable_get_internal(BUILTIN_d2i);
1408                                 OP_BUILTIN_NO_EXCEPTION(bte);
1409                         }
1410                         else
1411 #endif
1412                         {
1413                                 OP(opcode);
1414                         }
1415                         break;
1416
1417                 case JAVA_D2L:
1418 #if defined(__ALPHA__)
1419                         if (!opt_noieee) {
1420                                 bte = builtintable_get_internal(BUILTIN_d2l);
1421                                 OP_BUILTIN_NO_EXCEPTION(bte);
1422                         }
1423                         else
1424 #endif
1425                         {
1426                                 OP(opcode);
1427                         }
1428                         break;
1429
1430                 /* invalid opcodes ****************************************************/
1431
1432                         /* check for invalid opcodes if the verifier is enabled */
1433 #if defined(ENABLE_VERIFIER)
1434                 case JAVA_BREAKPOINT:
1435                         exceptions_throw_verifyerror(m, "Quick instructions shouldn't appear, yet.");
1436                         return false;
1437
1438                 case 186: /* unused opcode */
1439                 case 203:
1440                 case 204:
1441                 case 205:
1442                 case 206:
1443                 case 207:
1444                 case 208:
1445                 case 209:
1446                 case 210:
1447                 case 211:
1448                 case 212:
1449                 case 213:
1450                 case 214:
1451                 case 215:
1452                 case 216:
1453                 case 217:
1454                 case 218:
1455                 case 219:
1456                 case 220:
1457                 case 221:
1458                 case 222:
1459                 case 223:
1460                 case 224:
1461                 case 225:
1462                 case 226:
1463                 case 227:
1464                 case 228:
1465                 case 229:
1466                 case 230:
1467                 case 231:
1468                 case 232:
1469                 case 233:
1470                 case 234:
1471                 case 235:
1472                 case 236:
1473                 case 237:
1474                 case 238:
1475                 case 239:
1476                 case 240:
1477                 case 241:
1478                 case 242:
1479                 case 243:
1480                 case 244:
1481                 case 245:
1482                 case 246:
1483                 case 247:
1484                 case 248:
1485                 case 249:
1486                 case 250:
1487                 case 251:
1488                 case 252:
1489                 case 253:
1490                 case 254:
1491                 case 255:
1492                         exceptions_throw_verifyerror(m, "Illegal opcode %d at instr %d\n",
1493                                                                                  opcode, ipc);
1494                         return false;
1495                         break;
1496 #endif /* defined(ENABLE_VERIFIER) */
1497
1498                 /* opcodes that don't require translation *****************************/
1499
1500                 default:
1501                         /* straight-forward translation to ICMD */
1502                         OP(opcode);
1503                         break;
1504
1505                 } /* end switch */
1506
1507                 /* verifier checks ****************************************************/
1508
1509 #if defined(ENABLE_VERIFIER)
1510                 /* If WIDE was used correctly, iswide should have been reset by now. */
1511                 if (iswide) {
1512                         exceptions_throw_verifyerror(m,
1513                                         "Illegal instruction: WIDE before incompatible opcode");
1514                         return false;
1515                 }
1516 #endif /* defined(ENABLE_VERIFIER) */
1517
1518         } /* end for */
1519
1520         if (JITDATA_HAS_FLAG_REORDER(jd)) {
1521                 /* add a NOP to the last basic block */
1522
1523                 INSTRUCTIONS_CHECK(1);
1524                 OP(ICMD_NOP);
1525         }
1526
1527         /*** END OF LOOP **********************************************************/
1528
1529         /* assert that we did not write more ICMDs than allocated */
1530
1531         assert(ipc <= pd.instructionslength);
1532         assert(ipc == (iptr - pd.instructions));
1533
1534         /*** verifier checks ******************************************************/
1535
1536 #if defined(ENABLE_VERIFIER)
1537         if (p != m->jcodelength) {
1538                 exceptions_throw_verifyerror(m,
1539                                 "Command-sequence crosses code-boundary");
1540                 return false;
1541         }
1542
1543         if (!blockend) {
1544                 exceptions_throw_verifyerror(m, "Falling off the end of the code");
1545                 return false;
1546         }
1547 #endif /* defined(ENABLE_VERIFIER) */
1548
1549         /*** setup the methodinfo, allocate stack and basic blocks ****************/
1550
1551         /* adjust block count if target 0 is not first intermediate instruction */
1552
1553         if (!jd->basicblockindex[0] || (jd->basicblockindex[0] > 1))
1554                 b_count++;
1555
1556         /* copy local to method variables */
1557
1558         jd->instructions = pd.instructions;
1559         jd->instructioncount = ipc;
1560         jd->basicblockcount = b_count;
1561         jd->stackcount = s_count + jd->basicblockcount * m->maxstack; /* in-stacks */
1562
1563         /* allocate stack table */
1564
1565         jd->stack = DMNEW(stackelement, jd->stackcount);
1566
1567         /* build basic block list */
1568
1569         bptr = jd->basicblocks = DMNEW(basicblock, b_count + 1);    /* one more for end ipc */
1570
1571         /* zero out all basic block structures */
1572
1573         MZERO(bptr, basicblock, b_count + 1);
1574
1575         b_count = 0;
1576
1577         /* additional block if target 0 is not first intermediate instruction */
1578
1579         if (!jd->basicblockindex[0] || (jd->basicblockindex[0] > 1)) {
1580                 BASICBLOCK_INIT(bptr, m);
1581
1582                 bptr->iinstr = jd->instructions;
1583                 /* bptr->icount is set when the next block is allocated */
1584
1585                 bptr->nr = b_count++;
1586                 bptr++;
1587                 bptr[-1].next = bptr;
1588         }
1589
1590         /* allocate blocks */
1591
1592         for (p = 0; p < m->jcodelength; p++) {
1593                 if (jd->basicblockindex[p] & 1) {
1594 #if defined(ENABLE_VERIFIER)
1595                         /* Check if this block starts at the beginning of an
1596                            instruction. */
1597
1598                         if (!pd.instructionstart[p]) {
1599                                 exceptions_throw_verifyerror(m,
1600                                                 "Branch into middle of instruction");
1601                                 return false;
1602                         }
1603 #endif
1604
1605                         /* allocate the block */
1606
1607                         BASICBLOCK_INIT(bptr, m);
1608
1609                         bptr->iinstr = jd->instructions + (jd->basicblockindex[p] >> 1);
1610                         if (b_count) {
1611                                 bptr[-1].icount = bptr->iinstr - bptr[-1].iinstr;
1612                         }
1613                         /* bptr->icount is set when the next block is allocated */
1614
1615                         jd->basicblockindex[p] = b_count;
1616
1617                         bptr->nr = b_count++;
1618                         bptr++;
1619                         bptr[-1].next = bptr;
1620                 }
1621         }
1622
1623         /* set instruction count of last real block */
1624
1625         if (b_count) {
1626                 bptr[-1].icount = (jd->instructions + jd->instructioncount) - bptr[-1].iinstr;
1627         }
1628
1629         /* allocate additional block at end */
1630
1631         BASICBLOCK_INIT(bptr,m);
1632         bptr->nr = b_count;
1633         jd->basicblockindex[m->jcodelength] = b_count;
1634
1635         /* set basicblock pointers in exception table */
1636
1637         if (!parse_resolve_exception_table(jd))
1638                 return false;
1639
1640         /* store the local map */
1641
1642         jd->local_map = local_map;
1643
1644         /* calculate local variable renaming */
1645
1646         {
1647                 s4 nlocals = 0;
1648                 s4 i;
1649
1650                 s4 *mapptr;
1651
1652                 mapptr = local_map;
1653
1654                 /* iterate over local_map[0..m->maxlocals*5] and set all existing  */
1655                 /* index,type pairs (local_map[index*5+type]==1) to an unique value */
1656                 /* -> == new local var index */
1657                 for(i = 0; i < (m->maxlocals * 5); i++, mapptr++) {
1658                         if (*mapptr)
1659                                 *mapptr = nlocals++;
1660                         else
1661                                 *mapptr = UNUSED;
1662                 }
1663
1664                 jd->localcount = nlocals;
1665
1666                 /* calculate the (maximum) number of variables needed */
1667
1668                 jd->varcount =
1669                           nlocals                                      /* local variables */
1670                         + jd->basicblockcount * m->maxstack                 /* invars */
1671                         + s_count;         /* variables created within blocks (non-invar) */
1672
1673                 /* reserve the first indices for local variables */
1674
1675                 jd->vartop = nlocals;
1676
1677                 /* reserve extra variables needed by stack analyse */
1678
1679                 jd->varcount += STACK_EXTRA_VARS;
1680                 jd->vartop   += STACK_EXTRA_VARS;
1681
1682                 /* The verifier needs space for saving invars in some cases and */
1683                 /* extra variables.                                             */
1684
1685 #if defined(ENABLE_VERIFIER)
1686                 jd->varcount += VERIFIER_EXTRA_LOCALS + VERIFIER_EXTRA_VARS + m->maxstack;
1687                 jd->vartop   += VERIFIER_EXTRA_LOCALS + VERIFIER_EXTRA_VARS + m->maxstack;
1688 #endif
1689                 /* allocate and initialize the variable array */
1690
1691                 jd->var = DMNEW(varinfo, jd->varcount);
1692                 MZERO(jd->var, varinfo, jd->varcount);
1693
1694                 /* set types of all locals in jd->var */
1695
1696                 for(mapptr = local_map, i = 0; i < (m->maxlocals * 5); i++, mapptr++)
1697                         if (*mapptr != UNUSED)
1698                                 VAR(*mapptr)->type = i%5;
1699         }
1700
1701         /* everything's ok */
1702
1703         return true;
1704
1705         /*** goto labels for throwing verifier exceptions *************************/
1706
1707 #if defined(ENABLE_VERIFIER)
1708
1709 throw_unexpected_end_of_bytecode:
1710         exceptions_throw_verifyerror(m, "Unexpected end of bytecode");
1711         return false;
1712
1713 throw_invalid_bytecode_index:
1714         exceptions_throw_verifyerror(m, "Illegal target of branch instruction");
1715         return false;
1716
1717 throw_illegal_local_variable_number:
1718         exceptions_throw_verifyerror(m, "Illegal local variable number");
1719         return false;
1720
1721 #endif /* ENABLE_VERIFIER */
1722 }
1723
1724
1725 /*
1726  * These are local overrides for various environment variables in Emacs.
1727  * Please do not remove this and leave it at the end of the file, where
1728  * Emacs will automagically detect them.
1729  * ---------------------------------------------------------------------
1730  * Local variables:
1731  * mode: c
1732  * indent-tabs-mode: t
1733  * c-basic-offset: 4
1734  * tab-width: 4
1735  * End:
1736  * vim:noexpandtab:sw=4:ts=4:
1737  */