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 5435 2006-09-08 18:14:50Z 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->new_basicblockindex = DMNEW(s4, m->jcodelength + 1);
 103         pd->instructionstart = DMNEW(u1, m->jcodelength + 1);
 104
 105         MZERO(jd->new_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_check_instructions ****************************************************
 125
 126    Checks if there's enough room in the instructions array for the
 127    required instructions.  If not, reallocate the data structures.
 128
 129 *******************************************************************************/
 130
 131 static instruction *parse_check_instructions(parsedata_t *pd, s4 ipc)
 132 {
 133         /* increase the size of the instruction array */
 134
 135         pd->instructionslength += INSTRUCTIONS_INCREMENT;
 136
 137         /* reallocate the array */
 138
 139         pd->instructions = DMREALLOC(pd->instructions, instruction, ipc,
 140                                                                  pd->instructionslength);
 141
 142         /* return the iptr */
 143
 144         return pd->instructions + ipc;
 145 }
 146
 147
 148 /*******************************************************************************
 149
 150         function 'parse' scans the JavaVM code and generates intermediate code
 151
 152         During parsing the block index table is used to store at bit pos 0
 153         a flag which marks basic block starts and at position 1 to 31 the
 154         intermediate instruction index. After parsing the block index table
 155         is scanned, for marked positions a block is generated and the block
 156         number is stored in the block index table.
 157
 158 *******************************************************************************/
 159
 160 static exceptiontable * new_fillextable(
 161                                                                         jitdata *jd,
 162                                                                         methodinfo *m,
 163                                                                         exceptiontable *extable,
 164                                                                         exceptiontable *raw_extable,
 165                                                                 int exceptiontablelength,
 166                                                                         int *block_count)
 167 {
 168         int b_count, p, src;
 169
 170         if (exceptiontablelength == 0)
 171                 return extable;
 172
 173         b_count = *block_count;
 174
 175         for (src = exceptiontablelength-1; src >=0; src--) {
 176                 /* the start of the handled region becomes a basic block start */
 177                 p = raw_extable[src].startpc;
 178                 CHECK_BYTECODE_INDEX(p);
 179                 extable->startpc = p;
 180                 MARK_BASICBLOCK(p);
 181
 182                 p = raw_extable[src].endpc; /* see JVM Spec 4.7.3 */
 183                 CHECK_BYTECODE_INDEX_EXCLUSIVE(p);
 184
 185 #if defined(ENABLE_VERIFIER)
 186                 if (p <= raw_extable[src].startpc) {
 187                         exceptions_throw_verifyerror(m,
 188                                 "Invalid exception handler range");
 189                         return NULL;
 190                 }
 191 #endif
 192                 extable->endpc = p;
 193
 194                 /* end of handled region becomes a basic block boundary  */
 195                 /* (If it is the bytecode end, we'll use the special     */
 196                 /* end block that is created anyway.)                    */
 197                 if (p < m->jcodelength)
 198                         MARK_BASICBLOCK(p);
 199
 200                 /* the start of the handler becomes a basic block start  */
 201                 p = raw_extable[src].handlerpc;
 202                 CHECK_BYTECODE_INDEX(p);
 203                 extable->handlerpc = p;
 204                 MARK_BASICBLOCK(p);
 205
 206                 extable->catchtype = raw_extable[src].catchtype;
 207                 extable->next = NULL;
 208                 extable->down = &extable[1];
 209                 extable--;
 210         }
 211
 212         *block_count = b_count;
 213
 214         /* everything ok */
 215         return extable;
 216
 217 #if defined(ENABLE_VERIFIER)
 218 throw_invalid_bytecode_index:
 219         exceptions_throw_verifyerror(m,
 220                                                                  "Illegal bytecode index in exception table");
 221         return NULL;
 222 #endif
 223 }
 224
 225 /*** macro for checking the length of the bytecode ***/
 226
 227 #if defined(ENABLE_VERIFIER)
 228 #define CHECK_END_OF_BYTECODE(neededlength) \
 229         do { \
 230                 if ((neededlength) > m->jcodelength) \
 231                         goto throw_unexpected_end_of_bytecode; \
 232         } while (0)
 233 #else /* !ENABLE_VERIFIER */
 234 #define CHECK_END_OF_BYTECODE(neededlength)
 235 #endif /* ENABLE_VERIFIER */
 236
 237 bool new_parse(jitdata *jd)
 238 {
 239         methodinfo  *m;                     /* method being parsed                */
 240         codeinfo    *code;
 241         codegendata *cd;
 242         parsedata_t  pd;
 243         instruction *iptr;                  /* current ptr into instruction array */
 244         s4           ipc;                   /* intermediate instruction counter   */
 245         s4           p;                     /* java instruction counter           */
 246         s4           nextp;                 /* start of next java instruction     */
 247         s4           opcode;                /* java opcode                        */
 248         s4           i;
 249         s4           j;
 250         int  b_count = 0;           /* basic block counter                      */
 251         int  s_count = 0;           /* stack element counter                    */
 252         bool blockend = false;      /* true if basic block end has been reached */
 253         bool iswide = false;        /* true if last instruction was a wide      */
 254         constant_classref  *cr;
 255         constant_classref  *compr;
 256         classinfo          *c;
 257         builtintable_entry *bte;
 258         constant_FMIref    *mr;
 259         methoddesc         *md;
 260         unresolved_method  *um;
 261         resolve_result_t    result;
 262         u2                  lineindex = 0;
 263         u2                  currentline = 0;
 264         u2                  linepcchange = 0;
 265         u4                  flags;
 266         basicblock         *bptr;
 267
 268         int                *local_map; /* local pointer to renaming structore     */
 269                                        /* is assigned to rd->local_map at the end */
 270         /* get required compiler data */
 271
 272         m    = jd->m;
 273         code = jd->code;
 274         cd   = jd->cd;
 275
 276         /* allocate buffers for local variable renaming */
 277         local_map = DMNEW(int, cd->maxlocals * 5);
 278         for (i = 0; i < cd->maxlocals; i++) {
 279                 local_map[i * 5 + 0] = 0;
 280                 local_map[i * 5 + 1] = 0;
 281                 local_map[i * 5 + 2] = 0;
 282                 local_map[i * 5 + 3] = 0;
 283                 local_map[i * 5 + 4] = 0;
 284         }
 285
 286         /* initialize the parse data structures */
 287
 288         parse_setup(jd, &pd);
 289
 290         /* initialize local variables */
 291
 292         iptr = pd.instructions;
 293         ipc  = 0;
 294
 295         /* compute branch targets of exception table */
 296
 297         if (!new_fillextable(jd, m,
 298                         &(cd->exceptiontable[cd->exceptiontablelength-1]),
 299                         m->exceptiontable,
 300                         m->exceptiontablelength,
 301                         &b_count))
 302         {
 303                 return false;
 304         }
 305
 306         s_count = 1 + m->exceptiontablelength; /* initialize stack element counter   */
 307
 308 #if defined(ENABLE_THREADS)
 309         if (checksync && (m->flags & ACC_SYNCHRONIZED))
 310                 jd->isleafmethod = false;
 311 #endif
 312
 313         /* setup line number info */
 314
 315         currentline = 0;
 316         linepcchange = 0;
 317
 318         if (m->linenumbercount == 0) {
 319                 lineindex = 0;
 320         }
 321         else {
 322                 linepcchange = m->linenumbers[0].start_pc;
 323         }
 324
 325         /*** LOOP OVER ALL BYTECODE INSTRUCTIONS **********************************/
 326
 327         for (p = 0; p < m->jcodelength; p = nextp) {
 328
 329                 /* mark this position as a valid instruction start */
 330
 331                 pd.instructionstart[p] = 1;
 332
 333                 /* change the current line number, if necessary */
 334
 335                 /* XXX rewrite this using pointer arithmetic */
 336
 337                 if (linepcchange == p) {
 338                         if (m->linenumbercount > lineindex) {
 339 next_linenumber:
 340                                 currentline = m->linenumbers[lineindex].line_number;
 341                                 lineindex++;
 342                                 if (lineindex < m->linenumbercount) {
 343                                         linepcchange = m->linenumbers[lineindex].start_pc;
 344                                         if (linepcchange == p)
 345                                                 goto next_linenumber;
 346                                 }
 347                         }
 348                 }
 349
 350 fetch_opcode:
 351                 /* fetch next opcode  */
 352
 353                 opcode = SUCK_BE_U1(m->jcode + p);
 354
 355                 /* some compilers put a JAVA_NOP after a blockend instruction */
 356
 357                 if (blockend && (opcode != JAVA_NOP)) {
 358                         /* start new block */
 359
 360                         MARK_BASICBLOCK(p);
 361                         blockend = false;
 362                 }
 363
 364                 /* store intermediate instruction count (bit 0 mark block starts) */
 365
 366                 jd->new_basicblockindex[p] |= (ipc << 1);
 367
 368                 /* compute next instruction start */
 369
 370                 nextp = p + jcommandsize[opcode];
 371
 372                 CHECK_END_OF_BYTECODE(nextp);
 373
 374                 /* add stack elements produced by this instruction */
 375
 376                 s_count += stackreq[opcode];
 377
 378                 /* We check here for the space of 1 instruction in the
 379                    instruction array.  If an opcode is converted to more than
 380                    1 instruction, this is checked in the corresponding
 381                    case. */
 382
 383                 INSTRUCTIONS_CHECK(1);
 384
 385                 /* translate this bytecode instruction */
 386                 switch (opcode) {
 387
 388                 case JAVA_NOP:
 389                         break;
 390
 391                 /* pushing constants onto the stack ***********************************/
 392
 393                 case JAVA_BIPUSH:
 394                         OP_LOADCONST_I(SUCK_BE_S1(m->jcode + p + 1));
 395                         break;
 396
 397                 case JAVA_SIPUSH:
 398                         OP_LOADCONST_I(SUCK_BE_S2(m->jcode + p + 1));
 399                         break;
 400
 401                 case JAVA_LDC1:
 402                         i = SUCK_BE_U1(m->jcode + p + 1);
 403                         goto pushconstantitem;
 404
 405                 case JAVA_LDC2:
 406                 case JAVA_LDC2W:
 407                         i = SUCK_BE_U2(m->jcode + p + 1);
 408
 409                 pushconstantitem:
 410
 411 #if defined(ENABLE_VERIFIER)
 412                         if (i >= m->class->cpcount) {
 413                                 exceptions_throw_verifyerror(m,
 414                                         "Attempt to access constant outside range");
 415                                 return false;
 416                         }
 417 #endif
 418
 419                         switch (m->class->cptags[i]) {
 420                         case CONSTANT_Integer:
 421                                 OP_LOADCONST_I(((constant_integer *) (m->class->cpinfos[i]))->value);
 422                                 break;
 423                         case CONSTANT_Long:
 424                                 OP_LOADCONST_L(((constant_long *) (m->class->cpinfos[i]))->value);
 425                                 break;
 426                         case CONSTANT_Float:
 427                                 OP_LOADCONST_F(((constant_float *) (m->class->cpinfos[i]))->value);
 428                                 break;
 429                         case CONSTANT_Double:
 430                                 OP_LOADCONST_D(((constant_double *) (m->class->cpinfos[i]))->value);
 431                                 break;
 432                         case CONSTANT_String:
 433                                 OP_LOADCONST_STRING(literalstring_new((utf *) (m->class->cpinfos[i])));
 434                                 break;
 435                         case CONSTANT_Class:
 436                                 cr = (constant_classref *) (m->class->cpinfos[i]);
 437
 438                                 if (!resolve_classref(m, cr, resolveLazy, true, true, &c))
 439                                         return false;
 440
 441                                 /* if not resolved, c == NULL */
 442
 443                                 OP_LOADCONST_CLASSINFO_OR_CLASSREF_CHECK(c, cr);
 444
 445                                 break;
 446
 447 #if defined(ENABLE_VERIFIER)
 448                         default:
 449                                 exceptions_throw_verifyerror(m,
 450                                                 "Invalid constant type to push");
 451                                 return false;
 452 #endif
 453                         }
 454                         break;
 455
 456                 case JAVA_ACONST_NULL:
 457                         OP_LOADCONST_NULL();
 458                         break;
 459
 460                 case JAVA_ICONST_M1:
 461                 case JAVA_ICONST_0:
 462                 case JAVA_ICONST_1:
 463                 case JAVA_ICONST_2:
 464                 case JAVA_ICONST_3:
 465                 case JAVA_ICONST_4:
 466                 case JAVA_ICONST_5:
 467                         OP_LOADCONST_I(opcode - JAVA_ICONST_0);
 468                         break;
 469
 470                 case JAVA_LCONST_0:
 471                 case JAVA_LCONST_1:
 472                         OP_LOADCONST_L(opcode - JAVA_LCONST_0);
 473                         break;
 474
 475                 case JAVA_FCONST_0:
 476                 case JAVA_FCONST_1:
 477                 case JAVA_FCONST_2:
 478                         OP_LOADCONST_F(opcode - JAVA_FCONST_0);
 479                         break;
 480
 481                 case JAVA_DCONST_0:
 482                 case JAVA_DCONST_1:
 483                         OP_LOADCONST_D(opcode - JAVA_DCONST_0);
 484                         break;
 485
 486                 /* stack operations ***************************************************/
 487
 488                 /* We need space for additional ICMDs so we can translate these       */
 489                 /* instructions to sequences of ICMD_COPY and ICMD_MOVE instructions. */
 490
 491                 case JAVA_DUP_X1:
 492                         INSTRUCTIONS_CHECK(3);
 493                         OP(opcode);
 494                         OP(ICMD_NOP);
 495                         OP(ICMD_NOP);
 496                         break;
 497
 498                 case JAVA_DUP_X2:
 499                         INSTRUCTIONS_CHECK(4);
 500                         OP(opcode);
 501                         OP(ICMD_NOP);
 502                         OP(ICMD_NOP);
 503                         OP(ICMD_NOP);
 504                         break;
 505
 506                 case JAVA_DUP2:
 507                         INSTRUCTIONS_CHECK(2);
 508                         OP(opcode);
 509                         OP(ICMD_NOP);
 510                         break;
 511
 512                 case JAVA_DUP2_X1:
 513                         INSTRUCTIONS_CHECK(5);
 514                         OP(opcode);
 515                         OP(ICMD_NOP);
 516                         OP(ICMD_NOP);
 517                         OP(ICMD_NOP);
 518                         OP(ICMD_NOP);
 519                         break;
 520
 521                 case JAVA_DUP2_X2:
 522                         INSTRUCTIONS_CHECK(6);
 523                         OP(opcode);
 524                         OP(ICMD_NOP);
 525                         OP(ICMD_NOP);
 526                         OP(ICMD_NOP);
 527                         OP(ICMD_NOP);
 528                         OP(ICMD_NOP);
 529                         break;
 530
 531                 case JAVA_SWAP:
 532                         INSTRUCTIONS_CHECK(2);
 533                         OP(opcode);
 534                         OP(ICMD_NOP);
 535                         break;
 536
 537                 /* local variable access instructions *********************************/
 538
 539                 case JAVA_ILOAD:
 540                 case JAVA_FLOAD:
 541                 case JAVA_ALOAD:
 542                         if (iswide == false) {
 543                                 i = SUCK_BE_U1(m->jcode + p + 1);
 544                         }
 545                         else {
 546                                 i = SUCK_BE_U2(m->jcode + p + 1);
 547                                 nextp = p + 3;
 548                                 iswide = false;
 549                         }
 550                         OP_LOAD_ONEWORD(opcode, i, opcode - JAVA_ILOAD);
 551                         break;
 552
 553                 case JAVA_LLOAD:
 554                 case JAVA_DLOAD:
 555                         if (iswide == false) {
 556                                 i = SUCK_BE_U1(m->jcode + p + 1);
 557                         }
 558                         else {
 559                                 i = SUCK_BE_U2(m->jcode + p + 1);
 560                                 nextp = p + 3;
 561                                 iswide = false;
 562                         }
 563                         OP_LOAD_TWOWORD(opcode, i, opcode - JAVA_ILOAD);
 564                         break;
 565
 566                 case JAVA_ILOAD_0:
 567                 case JAVA_ILOAD_1:
 568                 case JAVA_ILOAD_2:
 569                 case JAVA_ILOAD_3:
 570                         OP_LOAD_ONEWORD(ICMD_ILOAD, opcode - JAVA_ILOAD_0, TYPE_INT);
 571                         break;
 572
 573                 case JAVA_LLOAD_0:
 574                 case JAVA_LLOAD_1:
 575                 case JAVA_LLOAD_2:
 576                 case JAVA_LLOAD_3:
 577                         OP_LOAD_TWOWORD(ICMD_LLOAD, opcode - JAVA_LLOAD_0, TYPE_LNG);
 578                         break;
 579
 580                 case JAVA_FLOAD_0:
 581                 case JAVA_FLOAD_1:
 582                 case JAVA_FLOAD_2:
 583                 case JAVA_FLOAD_3:
 584                         OP_LOAD_ONEWORD(ICMD_FLOAD, opcode - JAVA_FLOAD_0, TYPE_FLT);
 585                         break;
 586
 587                 case JAVA_DLOAD_0:
 588                 case JAVA_DLOAD_1:
 589                 case JAVA_DLOAD_2:
 590                 case JAVA_DLOAD_3:
 591                         OP_LOAD_TWOWORD(ICMD_DLOAD, opcode - JAVA_DLOAD_0, TYPE_DBL);
 592                         break;
 593
 594                 case JAVA_ALOAD_0:
 595                 case JAVA_ALOAD_1:
 596                 case JAVA_ALOAD_2:
 597                 case JAVA_ALOAD_3:
 598                         OP_LOAD_ONEWORD(ICMD_ALOAD, opcode - JAVA_ALOAD_0, TYPE_ADR);
 599                         break;
 600
 601                 case JAVA_ISTORE:
 602                 case JAVA_FSTORE:
 603                 case JAVA_ASTORE:
 604                         if (iswide == false) {
 605                                 i = SUCK_BE_U1(m->jcode + p + 1);
 606                         }
 607                         else {
 608                                 i = SUCK_BE_U2(m->jcode + p + 1);
 609                                 iswide = false;
 610                                 nextp = p + 3;
 611                         }
 612                         OP_STORE_ONEWORD(opcode, i, opcode - JAVA_ISTORE);
 613                         break;
 614
 615                 case JAVA_LSTORE:
 616                 case JAVA_DSTORE:
 617                         if (iswide == false) {
 618                                 i = SUCK_BE_U1(m->jcode + p + 1);
 619                         }
 620                         else {
 621                                 i = SUCK_BE_U2(m->jcode + p + 1);
 622                                 iswide = false;
 623                                 nextp = p + 3;
 624                         }
 625                         OP_STORE_TWOWORD(opcode, i, opcode - JAVA_ISTORE);
 626                         break;
 627
 628                 case JAVA_ISTORE_0:
 629                 case JAVA_ISTORE_1:
 630                 case JAVA_ISTORE_2:
 631                 case JAVA_ISTORE_3:
 632                         OP_STORE_ONEWORD(ICMD_ISTORE, opcode - JAVA_ISTORE_0, TYPE_INT);
 633                         break;
 634
 635                 case JAVA_LSTORE_0:
 636                 case JAVA_LSTORE_1:
 637                 case JAVA_LSTORE_2:
 638                 case JAVA_LSTORE_3:
 639                         OP_STORE_TWOWORD(ICMD_LSTORE, opcode - JAVA_LSTORE_0, TYPE_LNG);
 640                         break;
 641
 642                 case JAVA_FSTORE_0:
 643                 case JAVA_FSTORE_1:
 644                 case JAVA_FSTORE_2:
 645                 case JAVA_FSTORE_3:
 646                         OP_STORE_ONEWORD(ICMD_FSTORE, opcode - JAVA_FSTORE_0, TYPE_FLT);
 647                         break;
 648
 649                 case JAVA_DSTORE_0:
 650                 case JAVA_DSTORE_1:
 651                 case JAVA_DSTORE_2:
 652                 case JAVA_DSTORE_3:
 653                         OP_STORE_TWOWORD(ICMD_DSTORE, opcode - JAVA_DSTORE_0, TYPE_DBL);
 654                         break;
 655
 656                 case JAVA_ASTORE_0:
 657                 case JAVA_ASTORE_1:
 658                 case JAVA_ASTORE_2:
 659                 case JAVA_ASTORE_3:
 660                         OP_STORE_ONEWORD(ICMD_ASTORE, opcode - JAVA_ASTORE_0, TYPE_ADR);
 661                         break;
 662
 663                 case JAVA_IINC:
 664                         {
 665                                 int v;
 666
 667                                 if (iswide == false) {
 668                                         i = SUCK_BE_U1(m->jcode + p + 1);
 669                                         v = SUCK_BE_S1(m->jcode + p + 2);
 670
 671                                 }
 672                                 else {
 673                                         i = SUCK_BE_U2(m->jcode + p + 1);
 674                                         v = SUCK_BE_S2(m->jcode + p + 3);
 675                                         iswide = false;
 676                                         nextp = p + 5;
 677                                 }
 678                                 INDEX_ONEWORD(i);
 679                                 LOCALTYPE_USED(i, TYPE_INT);
 680                                 OP_LOCALINDEX_I(opcode, i, v);
 681                         }
 682                         break;
 683
 684                 /* wider index for loading, storing and incrementing ******************/
 685
 686                 case JAVA_WIDE:
 687                         iswide = true;
 688                         p++;
 689                         goto fetch_opcode;
 690
 691                 /* managing arrays ****************************************************/
 692
 693                 case JAVA_NEWARRAY:
 694                         switch (SUCK_BE_S1(m->jcode + p + 1)) {
 695                         case 4:
 696                                 bte = builtintable_get_internal(BUILTIN_newarray_boolean);
 697                                 break;
 698                         case 5:
 699                                 bte = builtintable_get_internal(BUILTIN_newarray_char);
 700                                 break;
 701                         case 6:
 702                                 bte = builtintable_get_internal(BUILTIN_newarray_float);
 703                                 break;
 704                         case 7:
 705                                 bte = builtintable_get_internal(BUILTIN_newarray_double);
 706                                 break;
 707                         case 8:
 708                                 bte = builtintable_get_internal(BUILTIN_newarray_byte);
 709                                 break;
 710                         case 9:
 711                                 bte = builtintable_get_internal(BUILTIN_newarray_short);
 712                                 break;
 713                         case 10:
 714                                 bte = builtintable_get_internal(BUILTIN_newarray_int);
 715                                 break;
 716                         case 11:
 717                                 bte = builtintable_get_internal(BUILTIN_newarray_long);
 718                                 break;
 719 #if defined(ENABLE_VERIFIER)
 720                         default:
 721                                 exceptions_throw_verifyerror(m, "Invalid array-type to create");
 722                                 return false;
 723 #endif
 724                         }
 725                         OP_BUILTIN_CHECK_EXCEPTION(bte);
 726                         break;
 727
 728                 case JAVA_ANEWARRAY:
 729                         i = SUCK_BE_U2(m->jcode + p + 1);
 730                         compr = (constant_classref *) class_getconstant(m->class, i, CONSTANT_Class);
 731                         if (!compr)
 732                                 return false;
 733
 734                         if (!(cr = class_get_classref_multiarray_of(1, compr)))
 735                                 return false;
 736
 737                         if (!resolve_classref(m, cr, resolveLazy, true, true, &c))
 738                                 return false;
 739
 740                         INSTRUCTIONS_CHECK(2);
 741                         OP_LOADCONST_CLASSINFO_OR_CLASSREF_NOCHECK(c, cr);
 742                         bte = builtintable_get_internal(BUILTIN_newarray);
 743                         OP_BUILTIN_CHECK_EXCEPTION(bte);
 744                         s_count++;
 745                         break;
 746
 747                 case JAVA_MULTIANEWARRAY:
 748                         jd->isleafmethod = false;
 749                         i = SUCK_BE_U2(m->jcode + p + 1);
 750                         j = SUCK_BE_U1(m->jcode + p + 3);
 751
 752                         cr = (constant_classref *) class_getconstant(m->class, i, CONSTANT_Class);
 753                         if (cr == NULL)
 754                                 return false;
 755
 756                         if (!resolve_classref(m, cr, resolveLazy, true, true, &c))
 757                                 return false;
 758
 759                         /* if unresolved, c == NULL */
 760
 761                         iptr->s1.argcount = j;
 762                         OP_S3_CLASSINFO_OR_CLASSREF(opcode, c, cr, 0 /* flags */);
 763                         break;
 764
 765                 /* control flow instructions ******************************************/
 766
 767                 case JAVA_IFEQ:
 768                 case JAVA_IFLT:
 769                 case JAVA_IFLE:
 770                 case JAVA_IFNE:
 771                 case JAVA_IFGT:
 772                 case JAVA_IFGE:
 773                 case JAVA_IFNULL:
 774                 case JAVA_IFNONNULL:
 775                 case JAVA_IF_ICMPEQ:
 776                 case JAVA_IF_ICMPNE:
 777                 case JAVA_IF_ICMPLT:
 778                 case JAVA_IF_ICMPGT:
 779                 case JAVA_IF_ICMPLE:
 780                 case JAVA_IF_ICMPGE:
 781                 case JAVA_IF_ACMPEQ:
 782                 case JAVA_IF_ACMPNE:
 783                 case JAVA_GOTO:
 784                         i = p + SUCK_BE_S2(m->jcode + p + 1);
 785                         CHECK_BYTECODE_INDEX(i);
 786                         MARK_BASICBLOCK(i);
 787                         blockend = true;
 788                         OP_INSINDEX(opcode, i);
 789                         break;
 790
 791                 case JAVA_GOTO_W:
 792                         i = p + SUCK_BE_S4(m->jcode + p + 1);
 793                         CHECK_BYTECODE_INDEX(i);
 794                         MARK_BASICBLOCK(i);
 795                         blockend = true;
 796                         OP_INSINDEX(opcode, i);
 797                         break;
 798
 799                 case JAVA_JSR:
 800                         i = p + SUCK_BE_S2(m->jcode + p + 1);
 801 jsr_tail:
 802                         CHECK_BYTECODE_INDEX(i);
 803                         MARK_BASICBLOCK(i);
 804                         blockend = true;
 805                         OP_PREPARE_ZEROFLAGS(JAVA_JSR);
 806                         iptr->sx.s23.s3.jsrtarget.insindex = i;
 807                         PINC;
 808                         break;
 809
 810                 case JAVA_JSR_W:
 811                         i = p + SUCK_BE_S4(m->jcode + p + 1);
 812                         goto jsr_tail;
 813
 814                 case JAVA_RET:
 815                         if (iswide == false) {
 816                                 i = SUCK_BE_U1(m->jcode + p + 1);
 817                         }
 818                         else {
 819                                 i = SUCK_BE_U2(m->jcode + p + 1);
 820                                 nextp = p + 3;
 821                                 iswide = false;
 822                         }
 823                         blockend = true;
 824
 825                         OP_LOAD_ONEWORD(opcode, i, TYPE_ADR);
 826                         break;
 827
 828                 case JAVA_IRETURN:
 829                 case JAVA_LRETURN:
 830                 case JAVA_FRETURN:
 831                 case JAVA_DRETURN:
 832                 case JAVA_ARETURN:
 833                 case JAVA_RETURN:
 834                         blockend = true;
 835                         /* XXX ARETURN will need a flag in the typechecker */
 836                         OP(opcode);
 837                         break;
 838
 839                 case JAVA_ATHROW:
 840                         blockend = true;
 841                         /* XXX ATHROW will need a flag in the typechecker */
 842                         OP(opcode);
 843                         break;
 844
 845
 846                 /* table jumps ********************************************************/
 847
 848                 case JAVA_LOOKUPSWITCH:
 849                         {
 850                                 s4 num, j;
 851                                 lookup_target_t *lookup;
 852 #if defined(ENABLE_VERIFIER)
 853                                 s4 prevvalue = 0;
 854 #endif
 855                                 blockend = true;
 856                                 nextp = ALIGN((p + 1), 4);
 857
 858                                 CHECK_END_OF_BYTECODE(nextp + 8);
 859
 860                                 OP_PREPARE_ZEROFLAGS(opcode);
 861
 862                                 /* default target */
 863
 864                                 j = p + SUCK_BE_S4(m->jcode + nextp);
 865                                 iptr->sx.s23.s3.lookupdefault.insindex = j;
 866                                 nextp += 4;
 867                                 CHECK_BYTECODE_INDEX(j);
 868                                 MARK_BASICBLOCK(j);
 869
 870                                 /* number of pairs */
 871
 872                                 num = SUCK_BE_U4(m->jcode + nextp);
 873                                 iptr->sx.s23.s2.lookupcount = num;
 874                                 nextp += 4;
 875
 876                                 /* allocate the intermediate code table */
 877
 878                                 lookup = DMNEW(lookup_target_t, num);
 879                                 iptr->dst.lookup = lookup;
 880
 881                                 /* iterate over the lookup table */
 882
 883                                 CHECK_END_OF_BYTECODE(nextp + 8 * num);
 884
 885                                 for (i = 0; i < num; i++) {
 886                                         /* value */
 887
 888                                         j = SUCK_BE_S4(m->jcode + nextp);
 889                                         lookup->value = j;
 890
 891                                         nextp += 4;
 892
 893 #if defined(ENABLE_VERIFIER)
 894                                         /* check if the lookup table is sorted correctly */
 895
 896                                         if (i && (j <= prevvalue)) {
 897                                                 exceptions_throw_verifyerror(m, "Unsorted lookup switch");
 898                                                 return false;
 899                                         }
 900                                         prevvalue = j;
 901 #endif
 902                                         /* target */
 903
 904                                         j = p + SUCK_BE_S4(m->jcode + nextp);
 905                                         lookup->target.insindex = j;
 906                                         lookup++;
 907                                         nextp += 4;
 908                                         CHECK_BYTECODE_INDEX(j);
 909                                         MARK_BASICBLOCK(j);
 910                                 }
 911
 912                                 PINC;
 913                                 break;
 914                         }
 915
 916
 917                 case JAVA_TABLESWITCH:
 918                         {
 919                                 s4 num, j;
 920                                 s4 deftarget;
 921                                 branch_target_t *table;
 922
 923                                 blockend = true;
 924                                 nextp = ALIGN((p + 1), 4);
 925
 926                                 CHECK_END_OF_BYTECODE(nextp + 12);
 927
 928                                 OP_PREPARE_ZEROFLAGS(opcode);
 929
 930                                 /* default target */
 931
 932                                 deftarget = p + SUCK_BE_S4(m->jcode + nextp);
 933                                 nextp += 4;
 934                                 CHECK_BYTECODE_INDEX(deftarget);
 935                                 MARK_BASICBLOCK(deftarget);
 936
 937                                 /* lower bound */
 938
 939                                 j = SUCK_BE_S4(m->jcode + nextp);
 940                                 iptr->sx.s23.s2.tablelow = j;
 941                                 nextp += 4;
 942
 943                                 /* upper bound */
 944
 945                                 num = SUCK_BE_S4(m->jcode + nextp);
 946                                 iptr->sx.s23.s3.tablehigh = num;
 947                                 nextp += 4;
 948
 949                                 /* calculate the number of table entries */
 950
 951                                 num = num - j + 1;
 952
 953 #if defined(ENABLE_VERIFIER)
 954                                 if (num < 1) {
 955                                         exceptions_throw_verifyerror(m,
 956                                                         "invalid TABLESWITCH: upper bound < lower bound");
 957                                         return false;
 958                                 }
 959 #endif
 960                                 /* create the intermediate code table */
 961                                 /* the first entry is the default target */
 962
 963                                 table = MNEW(branch_target_t, 1 + num);
 964                                 iptr->dst.table = table;
 965                                 (table++)->insindex = deftarget;
 966
 967                                 /* iterate over the target table */
 968
 969                                 CHECK_END_OF_BYTECODE(nextp + 4 * num);
 970
 971                                 for (i = 0; i < num; i++) {
 972                                         j = p + SUCK_BE_S4(m->jcode + nextp);
 973                                         (table++)->insindex = j;
 974                                         nextp += 4;
 975                                         CHECK_BYTECODE_INDEX(j);
 976                                         MARK_BASICBLOCK(j);
 977                                 }
 978
 979                                 PINC;
 980                                 break;
 981                         }
 982
 983
 984                 /* load and store of object fields ************************************/
 985
 986                 case JAVA_AASTORE:
 987                         OP(opcode);
 988                         jd->isleafmethod = false;
 989                         break;
 990
 991                 case JAVA_GETSTATIC:
 992                 case JAVA_PUTSTATIC:
 993                 case JAVA_GETFIELD:
 994                 case JAVA_PUTFIELD:
 995                         {
 996                                 constant_FMIref  *fr;
 997                                 unresolved_field *uf;
 998
 999                                 i = SUCK_BE_U2(m->jcode + p + 1);
1000                                 fr = class_getconstant(m->class, i, CONSTANT_Fieldref);
1001                                 if (!fr)
1002                                         return false;
1003
1004                                 OP_PREPARE_ZEROFLAGS(opcode);
1005                                 iptr->sx.s23.s3.fmiref = fr;
1006
1007                                 /* only with -noverify, otherwise the typechecker does this */
1008
1009 #if defined(ENABLE_VERIFIER)
1010                                 if (!JITDATA_HAS_FLAG_VERIFY(jd)) {
1011 #endif
1012                                         result = new_resolve_field_lazy(iptr, m);
1013                                         if (result == resolveFailed)
1014                                                 return false;
1015
1016                                         if (result != resolveSucceeded) {
1017                                                 uf = new_create_unresolved_field(m->class, m, iptr);
1018
1019                                                 if (uf == NULL)
1020                                                         return false;
1021
1022                                                 /* store the unresolved_field pointer */
1023
1024                                                 iptr->sx.s23.s3.uf = uf;
1025                                                 iptr->flags.bits = INS_FLAG_UNRESOLVED;
1026                                         }
1027 #if defined(ENABLE_VERIFIER)
1028                                 }
1029 #endif
1030                                 PINC;
1031                         }
1032                         break;
1033
1034
1035                 /* method invocation **************************************************/
1036
1037                 case JAVA_INVOKESTATIC:
1038                         i = SUCK_BE_U2(m->jcode + p + 1);
1039                         mr = class_getconstant(m->class, i, CONSTANT_Methodref);
1040
1041                         if (mr == NULL)
1042                                 return false;
1043
1044                         md = mr->parseddesc.md;
1045
1046                         if (md->params == NULL)
1047                                 if (!descriptor_params_from_paramtypes(md, ACC_STATIC))
1048                                         return false;
1049
1050                         goto invoke_method;
1051
1052                 case JAVA_INVOKEINTERFACE:
1053                         i = SUCK_BE_U2(m->jcode + p + 1);
1054
1055                         mr = class_getconstant(m->class, i, CONSTANT_InterfaceMethodref);
1056
1057                         goto invoke_nonstatic_method;
1058
1059                 case JAVA_INVOKESPECIAL:
1060                 case JAVA_INVOKEVIRTUAL:
1061                         i = SUCK_BE_U2(m->jcode + p + 1);
1062                         mr = class_getconstant(m->class, i, CONSTANT_Methodref);
1063
1064 invoke_nonstatic_method:
1065                         if (mr == NULL)
1066                                 return false;
1067
1068                         md = mr->parseddesc.md;
1069
1070                         if (md->params == NULL)
1071                                 if (!descriptor_params_from_paramtypes(md, 0))
1072                                         return false;
1073
1074 invoke_method:
1075                         jd->isleafmethod = false;
1076
1077                         OP_PREPARE_ZEROFLAGS(opcode);
1078                         iptr->sx.s23.s3.fmiref = mr;
1079
1080                         /* only with -noverify, otherwise the typechecker does this */
1081
1082 #if defined(ENABLE_VERIFIER)
1083                         if (!JITDATA_HAS_FLAG_VERIFY(jd)) {
1084 #endif
1085                                 result = new_resolve_method_lazy(iptr, m);
1086                                 if (result == resolveFailed)
1087                                         return false;
1088
1089                                 if (result != resolveSucceeded) {
1090                                         um = new_create_unresolved_method(m->class, m, iptr);
1091
1092                                         if (!um)
1093                                                 return false;
1094
1095                                         /* store the unresolved_method pointer */
1096
1097                                         iptr->sx.s23.s3.um = um;
1098                                         iptr->flags.bits = INS_FLAG_UNRESOLVED;
1099                                 }
1100 #if defined(ENABLE_VERIFIER)
1101                         }
1102 #endif
1103                         PINC;
1104                         break;
1105
1106                 /* instructions taking class arguments ********************************/
1107
1108                 case JAVA_NEW:
1109                         i = SUCK_BE_U2(m->jcode + p + 1);
1110                         cr = (constant_classref *) class_getconstant(m->class, i, CONSTANT_Class);
1111                         if (!cr)
1112                                 return false;
1113
1114                         if (!resolve_classref(m, cr, resolveLazy, true, true, &c))
1115                                 return false;
1116
1117                         INSTRUCTIONS_CHECK(2);
1118                         OP_LOADCONST_CLASSINFO_OR_CLASSREF_NOCHECK(c, cr);
1119                         bte = builtintable_get_internal(BUILTIN_new);
1120                         OP_BUILTIN_CHECK_EXCEPTION(bte);
1121                         s_count++;
1122                         break;
1123
1124                 case JAVA_CHECKCAST:
1125                         i = SUCK_BE_U2(m->jcode + p + 1);
1126                         cr = (constant_classref *) class_getconstant(m->class, i, CONSTANT_Class);
1127                         if (cr == NULL)
1128                                 return false;
1129
1130                         if (!resolve_classref(m, cr, resolveLazy, true, true, &c))
1131                                 return false;
1132
1133                         if (cr->name->text[0] == '[') {
1134                                 /* array type cast-check */
1135                                 flags = INS_FLAG_ARRAY;
1136                                 jd->isleafmethod = false;
1137                         }
1138                         else {
1139                                 /* object type cast-check */
1140                                 flags = 0;
1141                         }
1142                         OP_S3_CLASSINFO_OR_CLASSREF(opcode, c, cr, flags);
1143                         break;
1144
1145                 case JAVA_INSTANCEOF:
1146                         i = SUCK_BE_U2(m->jcode + p + 1);
1147                         cr = (constant_classref *) class_getconstant(m->class, i, CONSTANT_Class);
1148                         if (cr == NULL)
1149                                 return false;
1150
1151                         if (!resolve_classref(m, cr, resolveLazy, true, true, &c))
1152                                 return false;
1153
1154                         if (cr->name->text[0] == '[') {
1155                                 /* array type cast-check */
1156                                 INSTRUCTIONS_CHECK(2);
1157                                 OP_LOADCONST_CLASSINFO_OR_CLASSREF_NOCHECK(c, cr);
1158                                 bte = builtintable_get_internal(BUILTIN_arrayinstanceof);
1159                                 OP_BUILTIN_NO_EXCEPTION(bte);
1160                                 s_count++;
1161                         }
1162                         else {
1163                                 /* object type cast-check */
1164                                 OP_S3_CLASSINFO_OR_CLASSREF(opcode, c, cr, 0 /* flags*/);
1165                         }
1166                         break;
1167
1168                 /* synchronization instructions ***************************************/
1169
1170                 case JAVA_MONITORENTER:
1171 #if defined(ENABLE_THREADS)
1172                         if (checksync) {
1173                                 bte = builtintable_get_internal(LOCK_monitor_enter);
1174                                 OP_BUILTIN_CHECK_EXCEPTION(bte);
1175                         }
1176                         else
1177 #endif
1178                         {
1179                                 OP(ICMD_CHECKNULL_POP);
1180                         }
1181                         break;
1182
1183                 case JAVA_MONITOREXIT:
1184 #if defined(ENABLE_THREADS)
1185                         if (checksync) {
1186                                 bte = builtintable_get_internal(LOCK_monitor_exit);
1187                                 OP_BUILTIN_CHECK_EXCEPTION(bte);
1188                         }
1189                         else
1190 #endif
1191                         {
1192                                 OP(ICMD_CHECKNULL_POP);
1193                         }
1194                         break;
1195
1196                 /* arithmetic instructions that may become builtin functions **********/
1197
1198                 case JAVA_IDIV:
1199 #if !SUPPORT_DIVISION
1200                         bte = builtintable_get_internal(BUILTIN_idiv);
1201                         OP_BUILTIN_ARITHMETIC(opcode, bte);
1202 #else
1203                         OP(opcode);
1204 #endif
1205                         break;
1206
1207                 case JAVA_IREM:
1208 #if !SUPPORT_DIVISION
1209                         bte = builtintable_get_internal(BUILTIN_irem);
1210                         OP_BUILTIN_ARITHMETIC(opcode, bte);
1211 #else
1212                         OP(opcode);
1213 #endif
1214                         break;
1215
1216                 case JAVA_LDIV:
1217 #if !(SUPPORT_DIVISION && SUPPORT_LONG && SUPPORT_LONG_DIV)
1218                         bte = builtintable_get_internal(BUILTIN_ldiv);
1219                         OP_BUILTIN_ARITHMETIC(opcode, bte);
1220 #else
1221                         OP(opcode);
1222 #endif
1223                         break;
1224
1225                 case JAVA_LREM:
1226 #if !(SUPPORT_DIVISION && SUPPORT_LONG && SUPPORT_LONG_DIV)
1227                         bte = builtintable_get_internal(BUILTIN_lrem);
1228                         OP_BUILTIN_ARITHMETIC(opcode, bte);
1229 #else
1230                         OP(opcode);
1231 #endif
1232                         break;
1233
1234                 case JAVA_FREM:
1235 #if defined(__I386__)
1236                         OP(opcode);
1237 #else
1238                         bte = builtintable_get_internal(BUILTIN_frem);
1239                         OP_BUILTIN_NO_EXCEPTION(bte);
1240 #endif
1241                         break;
1242
1243                 case JAVA_DREM:
1244 #if defined(__I386__)
1245                         OP(opcode);
1246 #else
1247                         bte = builtintable_get_internal(BUILTIN_drem);
1248                         OP_BUILTIN_NO_EXCEPTION(bte);
1249 #endif
1250                         break;
1251
1252                 case JAVA_F2I:
1253 #if defined(__ALPHA__)
1254                         if (!opt_noieee) {
1255                                 bte = builtintable_get_internal(BUILTIN_f2i);
1256                                 OP_BUILTIN_NO_EXCEPTION(bte);
1257                         }
1258                         else
1259 #endif
1260                         {
1261                                 OP(opcode);
1262                         }
1263                         break;
1264
1265                 case JAVA_F2L:
1266 #if defined(__ALPHA__)
1267                         if (!opt_noieee) {
1268                                 bte = builtintable_get_internal(BUILTIN_f2l);
1269                                 OP_BUILTIN_NO_EXCEPTION(bte);
1270                         }
1271                         else
1272 #endif
1273                         {
1274                                 OP(opcode);
1275                         }
1276                         break;
1277
1278                 case JAVA_D2I:
1279 #if defined(__ALPHA__)
1280                         if (!opt_noieee) {
1281                                 bte = builtintable_get_internal(BUILTIN_d2i);
1282                                 OP_BUILTIN_NO_EXCEPTION(bte);
1283                         }
1284                         else
1285 #endif
1286                         {
1287                                 OP(opcode);
1288                         }
1289                         break;
1290
1291                 case JAVA_D2L:
1292 #if defined(__ALPHA__)
1293                         if (!opt_noieee) {
1294                                 bte = builtintable_get_internal(BUILTIN_d2l);
1295                                 OP_BUILTIN_NO_EXCEPTION(bte);
1296                         }
1297                         else
1298 #endif
1299                         {
1300                                 OP(opcode);
1301                         }
1302                         break;
1303
1304                 /* invalid opcodes ****************************************************/
1305
1306                         /* check for invalid opcodes if the verifier is enabled */
1307 #if defined(ENABLE_VERIFIER)
1308                 case JAVA_BREAKPOINT:
1309                         exceptions_throw_verifyerror(m, "Quick instructions shouldn't appear, yet.");
1310                         return false;
1311
1312                 case 186: /* unused opcode */
1313                 case 203:
1314                 case 204:
1315                 case 205:
1316                 case 206:
1317                 case 207:
1318                 case 208:
1319                 case 209:
1320                 case 210:
1321                 case 211:
1322                 case 212:
1323                 case 213:
1324                 case 214:
1325                 case 215:
1326                 case 216:
1327                 case 217:
1328                 case 218:
1329                 case 219:
1330                 case 220:
1331                 case 221:
1332                 case 222:
1333                 case 223:
1334                 case 224:
1335                 case 225:
1336                 case 226:
1337                 case 227:
1338                 case 228:
1339                 case 229:
1340                 case 230:
1341                 case 231:
1342                 case 232:
1343                 case 233:
1344                 case 234:
1345                 case 235:
1346                 case 236:
1347                 case 237:
1348                 case 238:
1349                 case 239:
1350                 case 240:
1351                 case 241:
1352                 case 242:
1353                 case 243:
1354                 case 244:
1355                 case 245:
1356                 case 246:
1357                 case 247:
1358                 case 248:
1359                 case 249:
1360                 case 250:
1361                 case 251:
1362                 case 252:
1363                 case 253:
1364                 case 254:
1365                 case 255:
1366                         exceptions_throw_verifyerror(m, "Illegal opcode %d at instr %d\n",
1367                                                                                  opcode, ipc);
1368                         return false;
1369                         break;
1370 #endif /* defined(ENABLE_VERIFIER) */
1371
1372                 /* opcodes that don't require translation *****************************/
1373
1374                 default:
1375                         /* straight-forward translation to ICMD */
1376                         OP(opcode);
1377                         break;
1378
1379                 } /* end switch */
1380
1381                 /* verifier checks ****************************************************/
1382
1383 #if defined(ENABLE_VERIFIER)
1384                 /* If WIDE was used correctly, iswide should have been reset by now. */
1385                 if (iswide) {
1386                         exceptions_throw_verifyerror(m,
1387                                         "Illegal instruction: WIDE before incompatible opcode");
1388                         return false;
1389                 }
1390 #endif /* defined(ENABLE_VERIFIER) */
1391
1392         } /* end for */
1393
1394         /* add a NOP to the last basic block */
1395
1396         INSTRUCTIONS_CHECK(1);
1397         OP(ICMD_NOP);
1398
1399         /*** END OF LOOP **********************************************************/
1400
1401         /* assert that we did not write more ICMDs than allocated */
1402
1403         assert(ipc <= pd.instructionslength);
1404         assert(ipc == (iptr - pd.instructions));
1405
1406         /*** verifier checks ******************************************************/
1407
1408 #if defined(ENABLE_VERIFIER)
1409         if (p != m->jcodelength) {
1410                 exceptions_throw_verifyerror(m,
1411                                 "Command-sequence crosses code-boundary");
1412                 return false;
1413         }
1414
1415         if (!blockend) {
1416                 exceptions_throw_verifyerror(m, "Falling off the end of the code");
1417                 return false;
1418         }
1419 #endif /* defined(ENABLE_VERIFIER) */
1420
1421         /*** setup the methodinfo, allocate stack and basic blocks ****************/
1422
1423         /* adjust block count if target 0 is not first intermediate instruction */
1424
1425         if (!jd->new_basicblockindex[0] || (jd->new_basicblockindex[0] > 1))
1426                 b_count++;
1427
1428         /* copy local to method variables */
1429
1430         jd->new_instructions = pd.instructions;
1431         jd->new_instructioncount = ipc;
1432         jd->new_basicblockcount = b_count;
1433         jd->new_stackcount = s_count + jd->new_basicblockcount * m->maxstack; /* in-stacks */
1434
1435         /* allocate stack table */
1436
1437         jd->new_stack = DMNEW(stackelement, jd->new_stackcount);
1438
1439         /* build basic block list */
1440
1441         bptr = jd->new_basicblocks = DMNEW(basicblock, b_count + 1);    /* one more for end ipc */
1442
1443         /* zero out all basic block structures */
1444
1445         MZERO(bptr, basicblock, b_count + 1);
1446
1447         b_count = 0;
1448         jd->new_c_debug_nr = 0;
1449
1450         /* additional block if target 0 is not first intermediate instruction */
1451
1452         if (!jd->new_basicblockindex[0] || (jd->new_basicblockindex[0] > 1)) {
1453                 BASICBLOCK_INIT(bptr, m);
1454
1455                 bptr->iinstr = jd->new_instructions;
1456                 /* bptr->icount is set when the next block is allocated */
1457
1458                 bptr++;
1459                 b_count++;
1460                 bptr[-1].next = bptr;
1461         }
1462
1463         /* allocate blocks */
1464
1465         for (p = 0; p < m->jcodelength; p++) {
1466                 if (jd->new_basicblockindex[p] & 1) {
1467 #if defined(ENABLE_VERIFIER)
1468                         /* Check if this block starts at the beginning of an
1469                            instruction. */
1470
1471                         if (!pd.instructionstart[p]) {
1472                                 exceptions_throw_verifyerror(m,
1473                                                 "Branch into middle of instruction");
1474                                 return false;
1475                         }
1476 #endif
1477
1478                         /* allocate the block */
1479
1480                         BASICBLOCK_INIT(bptr, m);
1481
1482                         bptr->iinstr = jd->new_instructions + (jd->new_basicblockindex[p] >> 1);
1483                         if (b_count) {
1484                                 bptr[-1].icount = bptr->iinstr - bptr[-1].iinstr;
1485                         }
1486                         /* bptr->icount is set when the next block is allocated */
1487
1488                         jd->new_basicblockindex[p] = b_count;
1489
1490                         bptr++;
1491                         b_count++;
1492                         bptr[-1].next = bptr;
1493                 }
1494         }
1495
1496         /* set instruction count of last real block */
1497
1498         if (b_count) {
1499                 bptr[-1].icount = (jd->new_instructions + jd->new_instructioncount) - bptr[-1].iinstr;
1500         }
1501
1502         /* allocate additional block at end */
1503
1504         BASICBLOCK_INIT(bptr,m);
1505
1506         /* set basicblock pointers in exception table */
1507
1508         if (cd->exceptiontablelength > 0) {
1509                 cd->exceptiontable[cd->exceptiontablelength - 1].down = NULL;
1510         }
1511
1512         for (i = 0; i < cd->exceptiontablelength; ++i) {
1513                 p = cd->exceptiontable[i].startpc;
1514                 cd->exceptiontable[i].start = jd->new_basicblocks + jd->new_basicblockindex[p];
1515
1516                 p = cd->exceptiontable[i].endpc;
1517                 cd->exceptiontable[i].end = (p == m->jcodelength) ? (jd->new_basicblocks + jd->new_basicblockcount /*+ 1*/) : (jd->new_basicblocks + jd->new_basicblockindex[p]);
1518
1519                 p = cd->exceptiontable[i].handlerpc;
1520                 cd->exceptiontable[i].handler = jd->new_basicblocks + jd->new_basicblockindex[p];
1521         }
1522
1523         /* XXX activate this if you want to try inlining */
1524 #if 0
1525         for (i = 0; i < m->exceptiontablelength; ++i) {
1526                 p = m->exceptiontable[i].startpc;
1527                 m->exceptiontable[i].start = jd->new_basicblocks + jd->new_basicblockindex[p];
1528
1529                 p = m->exceptiontable[i].endpc;
1530                 m->exceptiontable[i].end = (p == m->jcodelength) ? (jd->new_basicblocks + jd->new_basicblockcount /*+ 1*/) : (jd->new_basicblocks + jd->new_basicblockindex[p]);
1531
1532                 p = m->exceptiontable[i].handlerpc;
1533                 m->exceptiontable[i].handler = jd->new_basicblocks + jd->new_basicblockindex[p];
1534         }
1535 #endif
1536
1537         jd->local_map = local_map;
1538
1539         /* calculate local variable renaming */
1540
1541         {
1542                 s4 nlocals = 0;
1543                 s4 i;
1544
1545                 s4 *mapptr;
1546
1547                 mapptr = local_map;
1548
1549                 /* iterate over local_map[0..m->maxlocals*5] and set all existing  */
1550                 /* index,type pairs (localmap[index*5+type]==1) to an unique value */
1551                 /* -> == new local var index */
1552                 for(i = 0; i < (cd->maxlocals * 5); i++, mapptr++) {
1553                         if (*mapptr)
1554                                 *mapptr = nlocals++;
1555                         else
1556                                 *mapptr = UNUSED;
1557                 }
1558
1559                 jd->localcount = nlocals;
1560                 /* if dropped varindices for temp stackslots get reused(?max 2*       */
1561                 /* m->maxstack elements for stack), nlocals + s_count would be        */
1562                 /* sufficient */
1563                 jd->varcount   = nlocals + s_count +
1564                         jd->new_basicblockcount * m->maxstack;        /* out-stacks */
1565
1566                 jd->vartop = nlocals;
1567                 jd->var = DMNEW(varinfo, jd->varcount);
1568                 MZERO(jd->var, varinfo, jd->varcount);
1569
1570                 /* set types of all Locals in jd->var */
1571                 for(mapptr = local_map, i = 0; i < (cd->maxlocals * 5); i++, mapptr++)
1572                         if (*mapptr != UNUSED)
1573                                 jd->var[*mapptr].type = i%5;
1574         }
1575
1576         /* everything's ok */
1577
1578         return true;
1579
1580         /*** goto labels for throwing verifier exceptions *************************/
1581
1582 #if defined(ENABLE_VERIFIER)
1583
1584 throw_unexpected_end_of_bytecode:
1585         exceptions_throw_verifyerror(m, "Unexpected end of bytecode");
1586         return false;
1587
1588 throw_invalid_bytecode_index:
1589         exceptions_throw_verifyerror(m, "Illegal target of branch instruction");
1590         return false;
1591
1592 throw_illegal_local_variable_number:
1593         exceptions_throw_verifyerror(m, "Illegal local variable number");
1594         return false;
1595
1596 #endif /* ENABLE_VERIFIER */
1597 }
1598
1599
1600 /*
1601  * These are local overrides for various environment variables in Emacs.
1602  * Please do not remove this and leave it at the end of the file, where
1603  * Emacs will automagically detect them.
1604  * ---------------------------------------------------------------------
1605  * Local variables:
1606  * mode: c
1607  * indent-tabs-mode: t
1608  * c-basic-offset: 4
1609  * tab-width: 4
1610  * End:
1611  * vim:noexpandtab:sw=4:ts=4:
1612  */