libjava/interpret-run.cc

   1 // interpret-run.cc - Code to interpret bytecode
   2
   3 /* Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation
   4
   5    This file is part of libgcj.
   6
   7 This software is copyrighted work licensed under the terms of the
   8 Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
   9 details.  */
  10
  11 /* This file is meant only to be included in interpret.cc, it should not be
  12  * compiled directly.   */
  13
  14   using namespace java::lang::reflect;
  15
  16   pc_t pc = NULL;
  17
  18   // FRAME_DESC registers this particular invocation as the top-most
  19   // interpreter frame.  This lets the stack tracing code (for
  20   // Throwable) print information about the method being interpreted
  21   // rather than about the interpreter itself.  FRAME_DESC has a
  22   // destructor so it cleans up automatically when the interpreter
  23   // returns.
  24   java::lang::Thread *thread = java::lang::Thread::currentThread();
  25
  26 #ifdef DEBUG
  27   _Jv_InterpFrame frame_desc (meth, thread, NULL, &pc);
  28 #else
  29   _Jv_InterpFrame frame_desc (meth, thread);
  30 #endif
  31
  32   _Jv_word stack[meth->max_stack];
  33   _Jv_word *sp = stack;
  34
  35   _Jv_word locals[meth->max_locals];
  36
  37 #ifdef DEBUG
  38   // This is the information needed to get and set local variables with
  39   // proper type checking.
  40   frame_desc.locals = locals;
  41   char locals_type[meth->max_locals];
  42   frame_desc.locals_type = locals_type;
  43
  44   // Set all slots as invalid until they are written to.
  45   memset (locals_type, 'x', meth->max_locals);
  46
  47   // We need to set the local variable types for the method arguments since
  48   // they are valid at invocation.
  49
  50   _Jv_Method *method = meth->get_method ();
  51   int type_ctr = 0;
  52
  53   // If the method is non-static, we need to set the type for the "this" pointer.
  54   if ((method->accflags & java::lang::reflect::Modifier::STATIC) == 0)
  55     {
  56       if (args)
  57         {
  58           // Set the "this" pointer for this frame.
  59           _Jv_word *this_ptr = reinterpret_cast<_Jv_word *> (args);
  60           frame_desc.obj_ptr = this_ptr[0].o;
  61         }
  62
  63       frame_desc.locals_type[0] = 'o';
  64       type_ctr++;
  65     }
  66
  67   // Now parse the method signature to set the types of the other arguments.
  68   int sig_len = method->signature->len ();
  69   char *signature = method->signature->chars ();
  70   for (int i = 1; signature[i] != ')' && i <= sig_len; i++)
  71     {
  72       if (signature[i] == 'Z' || signature[i] == 'B' || signature[i] == 'C'
  73           || signature[i] == 'S' || signature[i] == 'I')
  74         {
  75           frame_desc.locals_type[type_ctr] = 'i';
  76           type_ctr++;
  77           continue;
  78         }
  79       else if (signature[i] == 'F')
  80         {
  81           frame_desc.locals_type[type_ctr] = 'f';
  82           type_ctr++;
  83           continue;
  84         }
  85       else if (signature[i] == 'J')
  86         {
  87           frame_desc.locals_type[type_ctr] = 'l';
  88           frame_desc.locals_type[type_ctr+1] = 'x';
  89           type_ctr += 2;
  90           continue;
  91         }
  92       else if (signature[i] == 'D')
  93         {
  94           frame_desc.locals_type[type_ctr] = 'd';
  95           frame_desc.locals_type[type_ctr+1] = 'x';
  96           type_ctr += 2;
  97           continue;
  98         }
  99       else if (signature[i] == 'L')
 100         {
 101           frame_desc.locals_type[type_ctr] = 'o';
 102           type_ctr++;
 103           while (signature[i] != ';')
 104             i++;
 105           continue;
 106         }
 107       else if (signature[i] == '[')
 108         {
 109           frame_desc.locals_type[type_ctr] = 'o';
 110           type_ctr++;
 111
 112           // Ignore multi-dimensional arrays.
 113           while (signature[i] == '[')
 114             i++;
 115
 116           // Check for an object array
 117           if (signature[i] == 'L')
 118             {
 119               while (signature[i] != ';')
 120                 i++;
 121             }
 122           continue;
 123         }
 124     }
 125 #endif /* DEBUG */
 126
 127 #define INSN_LABEL(op) &&insn_##op
 128
 129   static const void *const insn_target[] =
 130   {
 131     INSN_LABEL(nop),
 132     INSN_LABEL(aconst_null),
 133     INSN_LABEL(iconst_m1),
 134     INSN_LABEL(iconst_0),
 135     INSN_LABEL(iconst_1),
 136     INSN_LABEL(iconst_2),
 137     INSN_LABEL(iconst_3),
 138     INSN_LABEL(iconst_4),
 139     INSN_LABEL(iconst_5),
 140     INSN_LABEL(lconst_0),
 141     INSN_LABEL(lconst_1),
 142     INSN_LABEL(fconst_0),
 143     INSN_LABEL(fconst_1),
 144     INSN_LABEL(fconst_2),
 145     INSN_LABEL(dconst_0),
 146     INSN_LABEL(dconst_1),
 147     INSN_LABEL(bipush),
 148     INSN_LABEL(sipush),
 149     INSN_LABEL(ldc),
 150     INSN_LABEL(ldc_w),
 151     INSN_LABEL(ldc2_w),
 152     INSN_LABEL(iload),
 153     INSN_LABEL(lload),
 154     INSN_LABEL(fload),
 155     INSN_LABEL(dload),
 156     INSN_LABEL(aload),
 157     INSN_LABEL(iload_0),
 158     INSN_LABEL(iload_1),
 159     INSN_LABEL(iload_2),
 160     INSN_LABEL(iload_3),
 161     INSN_LABEL(lload_0),
 162     INSN_LABEL(lload_1),
 163     INSN_LABEL(lload_2),
 164     INSN_LABEL(lload_3),
 165     INSN_LABEL(fload_0),
 166     INSN_LABEL(fload_1),
 167     INSN_LABEL(fload_2),
 168     INSN_LABEL(fload_3),
 169     INSN_LABEL(dload_0),
 170     INSN_LABEL(dload_1),
 171     INSN_LABEL(dload_2),
 172     INSN_LABEL(dload_3),
 173     INSN_LABEL(aload_0),
 174     INSN_LABEL(aload_1),
 175     INSN_LABEL(aload_2),
 176     INSN_LABEL(aload_3),
 177     INSN_LABEL(iaload),
 178     INSN_LABEL(laload),
 179     INSN_LABEL(faload),
 180     INSN_LABEL(daload),
 181     INSN_LABEL(aaload),
 182     INSN_LABEL(baload),
 183     INSN_LABEL(caload),
 184     INSN_LABEL(saload),
 185     INSN_LABEL(istore),
 186     INSN_LABEL(lstore),
 187     INSN_LABEL(fstore),
 188     INSN_LABEL(dstore),
 189     INSN_LABEL(astore),
 190     INSN_LABEL(istore_0),
 191     INSN_LABEL(istore_1),
 192     INSN_LABEL(istore_2),
 193     INSN_LABEL(istore_3),
 194     INSN_LABEL(lstore_0),
 195     INSN_LABEL(lstore_1),
 196     INSN_LABEL(lstore_2),
 197     INSN_LABEL(lstore_3),
 198     INSN_LABEL(fstore_0),
 199     INSN_LABEL(fstore_1),
 200     INSN_LABEL(fstore_2),
 201     INSN_LABEL(fstore_3),
 202     INSN_LABEL(dstore_0),
 203     INSN_LABEL(dstore_1),
 204     INSN_LABEL(dstore_2),
 205     INSN_LABEL(dstore_3),
 206     INSN_LABEL(astore_0),
 207     INSN_LABEL(astore_1),
 208     INSN_LABEL(astore_2),
 209     INSN_LABEL(astore_3),
 210     INSN_LABEL(iastore),
 211     INSN_LABEL(lastore),
 212     INSN_LABEL(fastore),
 213     INSN_LABEL(dastore),
 214     INSN_LABEL(aastore),
 215     INSN_LABEL(bastore),
 216     INSN_LABEL(castore),
 217     INSN_LABEL(sastore),
 218     INSN_LABEL(pop),
 219     INSN_LABEL(pop2),
 220     INSN_LABEL(dup),
 221     INSN_LABEL(dup_x1),
 222     INSN_LABEL(dup_x2),
 223     INSN_LABEL(dup2),
 224     INSN_LABEL(dup2_x1),
 225     INSN_LABEL(dup2_x2),
 226     INSN_LABEL(swap),
 227     INSN_LABEL(iadd),
 228     INSN_LABEL(ladd),
 229     INSN_LABEL(fadd),
 230     INSN_LABEL(dadd),
 231     INSN_LABEL(isub),
 232     INSN_LABEL(lsub),
 233     INSN_LABEL(fsub),
 234     INSN_LABEL(dsub),
 235     INSN_LABEL(imul),
 236     INSN_LABEL(lmul),
 237     INSN_LABEL(fmul),
 238     INSN_LABEL(dmul),
 239     INSN_LABEL(idiv),
 240     INSN_LABEL(ldiv),
 241     INSN_LABEL(fdiv),
 242     INSN_LABEL(ddiv),
 243     INSN_LABEL(irem),
 244     INSN_LABEL(lrem),
 245     INSN_LABEL(frem),
 246     INSN_LABEL(drem),
 247     INSN_LABEL(ineg),
 248     INSN_LABEL(lneg),
 249     INSN_LABEL(fneg),
 250     INSN_LABEL(dneg),
 251     INSN_LABEL(ishl),
 252     INSN_LABEL(lshl),
 253     INSN_LABEL(ishr),
 254     INSN_LABEL(lshr),
 255     INSN_LABEL(iushr),
 256     INSN_LABEL(lushr),
 257     INSN_LABEL(iand),
 258     INSN_LABEL(land),
 259     INSN_LABEL(ior),
 260     INSN_LABEL(lor),
 261     INSN_LABEL(ixor),
 262     INSN_LABEL(lxor),
 263     INSN_LABEL(iinc),
 264     INSN_LABEL(i2l),
 265     INSN_LABEL(i2f),
 266     INSN_LABEL(i2d),
 267     INSN_LABEL(l2i),
 268     INSN_LABEL(l2f),
 269     INSN_LABEL(l2d),
 270     INSN_LABEL(f2i),
 271     INSN_LABEL(f2l),
 272     INSN_LABEL(f2d),
 273     INSN_LABEL(d2i),
 274     INSN_LABEL(d2l),
 275     INSN_LABEL(d2f),
 276     INSN_LABEL(i2b),
 277     INSN_LABEL(i2c),
 278     INSN_LABEL(i2s),
 279     INSN_LABEL(lcmp),
 280     INSN_LABEL(fcmpl),
 281     INSN_LABEL(fcmpg),
 282     INSN_LABEL(dcmpl),
 283     INSN_LABEL(dcmpg),
 284     INSN_LABEL(ifeq),
 285     INSN_LABEL(ifne),
 286     INSN_LABEL(iflt),
 287     INSN_LABEL(ifge),
 288     INSN_LABEL(ifgt),
 289     INSN_LABEL(ifle),
 290     INSN_LABEL(if_icmpeq),
 291     INSN_LABEL(if_icmpne),
 292     INSN_LABEL(if_icmplt),
 293     INSN_LABEL(if_icmpge),
 294     INSN_LABEL(if_icmpgt),
 295     INSN_LABEL(if_icmple),
 296     INSN_LABEL(if_acmpeq),
 297     INSN_LABEL(if_acmpne),
 298     INSN_LABEL(goto),
 299     INSN_LABEL(jsr),
 300     INSN_LABEL(ret),
 301     INSN_LABEL(tableswitch),
 302     INSN_LABEL(lookupswitch),
 303     INSN_LABEL(ireturn),
 304     INSN_LABEL(lreturn),
 305     INSN_LABEL(freturn),
 306     INSN_LABEL(dreturn),
 307     INSN_LABEL(areturn),
 308     INSN_LABEL(return),
 309     INSN_LABEL(getstatic),
 310     INSN_LABEL(putstatic),
 311     INSN_LABEL(getfield),
 312     INSN_LABEL(putfield),
 313     INSN_LABEL(invokevirtual),
 314     INSN_LABEL(invokespecial),
 315     INSN_LABEL(invokestatic),
 316     INSN_LABEL(invokeinterface),
 317     INSN_LABEL(breakpoint),
 318     INSN_LABEL(new),
 319     INSN_LABEL(newarray),
 320     INSN_LABEL(anewarray),
 321     INSN_LABEL(arraylength),
 322     INSN_LABEL(athrow),
 323     INSN_LABEL(checkcast),
 324     INSN_LABEL(instanceof),
 325     INSN_LABEL(monitorenter),
 326     INSN_LABEL(monitorexit),
 327 #ifdef DIRECT_THREADED
 328     0, // wide
 329 #else
 330     INSN_LABEL(wide),
 331 #endif
 332     INSN_LABEL(multianewarray),
 333     INSN_LABEL(ifnull),
 334     INSN_LABEL(ifnonnull),
 335     INSN_LABEL(goto_w),
 336     INSN_LABEL(jsr_w),
 337 #ifdef DIRECT_THREADED
 338     INSN_LABEL (ldc_class)
 339 #else
 340     0
 341 #endif
 342   };
 343
 344 #ifdef DIRECT_THREADED
 345
 346 #ifdef DEBUG
 347 #undef NEXT_INSN
 348 #define NEXT_INSN                                                       \
 349   do                                                                    \
 350     {                                                                   \
 351       pc_t insn = pc++;                                                 \
 352       if (JVMTI_REQUESTED_EVENT (SingleStep))                           \
 353         {                                                               \
 354           JNIEnv *env = _Jv_GetCurrentJNIEnv ();                        \
 355           jmethodID method = meth->self;                                \
 356           jlocation loc = meth->insn_index (insn);                      \
 357           _Jv_JVMTI_PostEvent (JVMTI_EVENT_SINGLE_STEP, thread,         \
 358                                env, method, loc);                       \
 359         }                                                               \
 360       goto *(insn->insn);                                               \
 361     }                                                                   \
 362   while (0)
 363
 364 #undef REWRITE_INSN
 365 #define REWRITE_INSN(INSN,SLOT,VALUE)                                   \
 366   do {                                                                  \
 367     if (pc[-2].insn == breakpoint_insn->insn)                           \
 368       {                                                                 \
 369         using namespace ::gnu::gcj::jvmti;                              \
 370         jlocation location = meth->insn_index (pc - 2);                 \
 371         _Jv_RewriteBreakpointInsn (meth->self, location, (pc_t) INSN);  \
 372       }                                                                 \
 373     else                                                                \
 374       pc[-2].insn = INSN;                                               \
 375                                                                         \
 376     pc[-1].SLOT = VALUE;                                                \
 377   }                                                                     \
 378   while (0)
 379
 380 #undef INTERP_REPORT_EXCEPTION
 381 #define INTERP_REPORT_EXCEPTION(Jthrowable) REPORT_EXCEPTION (Jthrowable)
 382 #else // !DEBUG
 383 #undef NEXT_INSN
 384 #define NEXT_INSN goto *((pc++)->insn)
 385 #define REWRITE_INSN(INSN,SLOT,VALUE)           \
 386   do {                                          \
 387     pc[-2].insn = INSN;                         \
 388     pc[-1].SLOT = VALUE;                        \
 389   }                                             \
 390   while (0)
 391
 392 #undef INTERP_REPORT_EXCEPTION
 393 #define INTERP_REPORT_EXCEPTION(Jthrowable) /* not needed when not debugging */
 394 #endif // !DEBUG
 395
 396 #define INTVAL() ((pc++)->int_val)
 397 #define AVAL() ((pc++)->datum)
 398
 399 #define GET1S() INTVAL ()
 400 #define GET2S() INTVAL ()
 401 #define GET1U() INTVAL ()
 402 #define GET2U() INTVAL ()
 403 #define AVAL1U() AVAL ()
 404 #define AVAL2U() AVAL ()
 405 #define AVAL2UP() AVAL ()
 406 #define SKIP_GOTO ++pc
 407 #define GOTO_VAL() (insn_slot *) pc->datum
 408 #define PCVAL(unionval) unionval.p
 409 #define AMPAMP(label) &&label
 410
 411   // Compile if we must. NOTE: Double-check locking.
 412   if (meth->prepared == NULL)
 413     {
 414       _Jv_MutexLock (&compile_mutex);
 415       if (meth->prepared == NULL)
 416         meth->compile (insn_target);
 417       _Jv_MutexUnlock (&compile_mutex);
 418     }
 419
 420   // If we're only compiling, stop here
 421   if (args == NULL)
 422     return;
 423
 424   pc = (insn_slot *) meth->prepared;
 425
 426 #else
 427
 428 #ifdef DEBUG
 429 #define NEXT_INSN                                                       \
 430   do                                                                    \
 431     {                                                                   \
 432       if (JVMTI_REQUESTED_EVENT (SingleStep))                           \
 433         {                                                               \
 434           JNIEnv *env = _Jv_GetCurrentJNIEnv ();                        \
 435           jmethodID method = meth->self;                                \
 436           jlocation loc = meth->insn_index (pc);                        \
 437           _Jv_JVMTI_PostEvent (JVMTI_EVENT_SINGLE_STEP, thread,         \
 438                                env, method, loc);                       \
 439         }                                                               \
 440       goto *(insn_target[*pc++])
 441 #else
 442 #define NEXT_INSN goto *(insn_target[*pc++])
 443 #endif
 444
 445 #define GET1S() get1s (pc++)
 446 #define GET2S() (pc += 2, get2s (pc- 2))
 447 #define GET1U() get1u (pc++)
 448 #define GET2U() (pc += 2, get2u (pc - 2))
 449   // Note that these could be more efficient when not handling 'ldc
 450   // class'.
 451 #define AVAL1U()                                                \
 452   ({ int index = get1u (pc++);                                  \
 453     _Jv_Linker::resolve_pool_entry (meth->defining_class, index).o; })
 454 #define AVAL2U()                                                \
 455   ({ int index = get2u (pc); pc += 2;                           \
 456     _Jv_Linker::resolve_pool_entry (meth->defining_class, index).o; })
 457   // Note that we don't need to resolve the pool entry here as class
 458   // constants are never wide.
 459 #define AVAL2UP() ({ int index = get2u (pc); pc += 2; &pool_data[index]; })
 460 #define SKIP_GOTO pc += 2
 461 #define GOTO_VAL() pc - 1 + get2s (pc)
 462 #define PCVAL(unionval) unionval.i
 463 #define AMPAMP(label) NULL
 464
 465   pc = meth->bytecode ();
 466
 467 #endif /* DIRECT_THREADED */
 468
 469 #define TAKE_GOTO pc = GOTO_VAL ()
 470
 471   /* Go straight at it!  the ffi raw format matches the internal
 472      stack representation exactly.  At least, that's the idea.
 473   */
 474   memcpy ((void*) locals, (void*) args, meth->args_raw_size);
 475
 476   _Jv_word *pool_data = meth->defining_class->constants.data;
 477
 478   /* These three are temporaries for common code used by several
 479      instructions.  */
 480   void (*fun)();
 481   _Jv_ResolvedMethod* rmeth;
 482   int tmpval;
 483
 484   try
 485     {
 486       // We keep nop around.  It is used if we're interpreting the
 487       // bytecodes and not doing direct threading.
 488     insn_nop:
 489       NEXT_INSN;
 490
 491       /* The first few instructions here are ordered according to their
 492          frequency, in the hope that this will improve code locality a
 493          little.  */
 494
 495     insn_aload_0:               // 0x2a
 496       LOADA (0);
 497       NEXT_INSN;
 498
 499     insn_iload:         // 0x15
 500       LOADI (GET1U ());
 501       NEXT_INSN;
 502
 503     insn_iload_1:               // 0x1b
 504       LOADI (1);
 505       NEXT_INSN;
 506
 507     insn_invokevirtual: // 0xb6
 508       {
 509         SAVE_PC();
 510         int index = GET2U ();
 511
 512         /* _Jv_Linker::resolve_pool_entry returns immediately if the
 513          * value already is resolved.  If we want to clutter up the
 514          * code here to gain a little performance, then we can check
 515          * the corresponding bit JV_CONSTANT_ResolvedFlag in the tag
 516          * directly.  For now, I don't think it is worth it.  */
 517
 518         rmeth = (_Jv_Linker::resolve_pool_entry (meth->defining_class,
 519                                                    index)).rmethod;
 520
 521         sp -= rmeth->stack_item_count;
 522
 523         if (rmeth->method->accflags & Modifier::FINAL)
 524           {
 525             // We can't rely on NULLCHECK working if the method is final.
 526             if (! sp[0].o)
 527               throw_null_pointer_exception ();
 528
 529             // Final methods might not appear in the vtable.
 530             fun = (void (*)()) rmeth->method->ncode;
 531           }
 532         else
 533           {
 534             NULLCHECK (sp[0].o);
 535             jobject rcv = sp[0].o;
 536             _Jv_VTable *table = *(_Jv_VTable**) rcv;
 537             fun = (void (*)()) table->get_method (rmeth->method->index);
 538           }
 539
 540 #ifdef DIRECT_THREADED
 541         // Rewrite instruction so that we use a faster pre-resolved
 542         // method.
 543         REWRITE_INSN (&&invokevirtual_resolved, datum, rmeth);
 544 #endif /* DIRECT_THREADED */
 545       }
 546       goto perform_invoke;
 547
 548 #ifdef DIRECT_THREADED
 549     invokevirtual_resolved:
 550       {
 551         SAVE_PC();
 552         rmeth = (_Jv_ResolvedMethod *) AVAL ();
 553         sp -= rmeth->stack_item_count;
 554
 555         if (rmeth->method->accflags & Modifier::FINAL)
 556           {
 557             // We can't rely on NULLCHECK working if the method is final.
 558             if (! sp[0].o)
 559               throw_null_pointer_exception ();
 560
 561             // Final methods might not appear in the vtable.
 562             fun = (void (*)()) rmeth->method->ncode;
 563           }
 564         else
 565           {
 566             jobject rcv = sp[0].o;
 567             _Jv_VTable *table = *(_Jv_VTable**) rcv;
 568             fun = (void (*)()) table->get_method (rmeth->method->index);
 569           }
 570       }
 571       goto perform_invoke;
 572 #endif /* DIRECT_THREADED */
 573
 574     perform_invoke:
 575       {
 576         /* here goes the magic again... */
 577         ffi_cif *cif = &rmeth->cif;
 578         ffi_raw *raw = (ffi_raw*) sp;
 579
 580         _Jv_value rvalue;
 581
 582 #if FFI_NATIVE_RAW_API
 583         /* We assume that this is only implemented if it's correct      */
 584         /* to use it here.  On a 64 bit machine, it never is.           */
 585         ffi_raw_call (cif, fun, (void*)&rvalue, raw);
 586 #else
 587         ffi_java_raw_call (cif, fun, (void*)&rvalue, raw);
 588 #endif
 589
 590         int rtype = cif->rtype->type;
 591
 592         /* the likelyhood of object, int, or void return is very high,
 593          * so those are checked before the switch */
 594         if (rtype == FFI_TYPE_POINTER)
 595           {
 596             PUSHA (rvalue.object_value);
 597           }
 598         else if (rtype == FFI_TYPE_SINT32)
 599           {
 600             PUSHI (rvalue.int_value);
 601           }
 602         else if (rtype == FFI_TYPE_VOID)
 603           {
 604             /* skip */
 605           }
 606         else
 607           {
 608             switch (rtype)
 609               {
 610               case FFI_TYPE_SINT8:
 611                 PUSHI ((jbyte)(rvalue.int_value & 0xff));
 612                 break;
 613
 614               case FFI_TYPE_SINT16:
 615                 PUSHI ((jshort)(rvalue.int_value & 0xffff));
 616                 break;
 617
 618               case FFI_TYPE_UINT16:
 619                 PUSHI (rvalue.int_value & 0xffff);
 620                 break;
 621
 622               case FFI_TYPE_FLOAT:
 623                 PUSHF (rvalue.float_value);
 624                 break;
 625
 626               case FFI_TYPE_DOUBLE:
 627                 PUSHD (rvalue.double_value);
 628                 break;
 629
 630               case FFI_TYPE_SINT64:
 631                 PUSHL (rvalue.long_value);
 632                 break;
 633
 634               default:
 635                 throw_internal_error ("unknown return type in invokeXXX");
 636               }
 637           }
 638       }
 639       NEXT_INSN;
 640
 641     insn_aconst_null:
 642       PUSHA (NULL);
 643       NEXT_INSN;
 644
 645     insn_iconst_m1:
 646       PUSHI (-1);
 647       NEXT_INSN;
 648
 649     insn_iconst_0:
 650       PUSHI (0);
 651       NEXT_INSN;
 652
 653     insn_iconst_1:
 654       PUSHI (1);
 655       NEXT_INSN;
 656
 657     insn_iconst_2:
 658       PUSHI (2);
 659       NEXT_INSN;
 660
 661     insn_iconst_3:
 662       PUSHI (3);
 663       NEXT_INSN;
 664
 665     insn_iconst_4:
 666       PUSHI (4);
 667       NEXT_INSN;
 668
 669     insn_iconst_5:
 670       PUSHI (5);
 671       NEXT_INSN;
 672
 673     insn_lconst_0:
 674       PUSHL (0);
 675       NEXT_INSN;
 676
 677     insn_lconst_1:
 678       PUSHL (1);
 679       NEXT_INSN;
 680
 681     insn_fconst_0:
 682       PUSHF (0);
 683       NEXT_INSN;
 684
 685     insn_fconst_1:
 686       PUSHF (1);
 687       NEXT_INSN;
 688
 689     insn_fconst_2:
 690       PUSHF (2);
 691       NEXT_INSN;
 692
 693     insn_dconst_0:
 694       PUSHD (0);
 695       NEXT_INSN;
 696
 697     insn_dconst_1:
 698       PUSHD (1);
 699       NEXT_INSN;
 700
 701     insn_bipush:
 702       // For direct threaded, bipush and sipush are the same.
 703 #ifndef DIRECT_THREADED
 704       PUSHI (GET1S ());
 705       NEXT_INSN;
 706 #endif /* DIRECT_THREADED */
 707     insn_sipush:
 708       PUSHI (GET2S ());
 709       NEXT_INSN;
 710
 711     insn_ldc:
 712       // For direct threaded, ldc and ldc_w are the same.
 713 #ifndef DIRECT_THREADED
 714       PUSHA ((jobject) AVAL1U ());
 715       NEXT_INSN;
 716 #endif /* DIRECT_THREADED */
 717     insn_ldc_w:
 718       PUSHA ((jobject) AVAL2U ());
 719       NEXT_INSN;
 720
 721 #ifdef DIRECT_THREADED
 722       // For direct threaded we have a separate 'ldc class' operation.
 723     insn_ldc_class:
 724       {
 725         SAVE_PC();
 726         // We could rewrite the instruction at this point.
 727         int index = INTVAL ();
 728         jobject k = (_Jv_Linker::resolve_pool_entry (meth->defining_class,
 729                                                      index)).o;
 730         PUSHA (k);
 731       }
 732       NEXT_INSN;
 733 #endif /* DIRECT_THREADED */
 734
 735     insn_ldc2_w:
 736       {
 737         void *where = AVAL2UP ();
 738         memcpy (sp, where, 2*sizeof (_Jv_word));
 739         sp += 2;
 740       }
 741       NEXT_INSN;
 742
 743     insn_lload:
 744       LOADL (GET1U ());
 745       NEXT_INSN;
 746
 747     insn_fload:
 748       LOADF (GET1U ());
 749       NEXT_INSN;
 750
 751     insn_dload:
 752       LOADD (GET1U ());
 753       NEXT_INSN;
 754
 755     insn_aload:
 756       LOADA (GET1U ());
 757       NEXT_INSN;
 758
 759     insn_iload_0:
 760       LOADI (0);
 761       NEXT_INSN;
 762
 763     insn_iload_2:
 764       LOADI (2);
 765       NEXT_INSN;
 766
 767     insn_iload_3:
 768       LOADI (3);
 769       NEXT_INSN;
 770
 771     insn_lload_0:
 772       LOADL (0);
 773       NEXT_INSN;
 774
 775     insn_lload_1:
 776       LOADL (1);
 777       NEXT_INSN;
 778
 779     insn_lload_2:
 780       LOADL (2);
 781       NEXT_INSN;
 782
 783     insn_lload_3:
 784       LOADL (3);
 785       NEXT_INSN;
 786
 787     insn_fload_0:
 788       LOADF (0);
 789       NEXT_INSN;
 790
 791     insn_fload_1:
 792       LOADF (1);
 793       NEXT_INSN;
 794
 795     insn_fload_2:
 796       LOADF (2);
 797       NEXT_INSN;
 798
 799     insn_fload_3:
 800       LOADF (3);
 801       NEXT_INSN;
 802
 803     insn_dload_0:
 804       LOADD (0);
 805       NEXT_INSN;
 806
 807     insn_dload_1:
 808       LOADD (1);
 809       NEXT_INSN;
 810
 811     insn_dload_2:
 812       LOADD (2);
 813       NEXT_INSN;
 814
 815     insn_dload_3:
 816       LOADD (3);
 817       NEXT_INSN;
 818
 819     insn_aload_1:
 820       LOADA(1);
 821       NEXT_INSN;
 822
 823     insn_aload_2:
 824       LOADA(2);
 825       NEXT_INSN;
 826
 827     insn_aload_3:
 828       LOADA(3);
 829       NEXT_INSN;
 830
 831     insn_iaload:
 832       {
 833         jint index = POPI();
 834         jintArray arr = (jintArray) POPA();
 835         NULLARRAYCHECK (arr);
 836         ARRAYBOUNDSCHECK (arr, index);
 837         PUSHI( elements(arr)[index] );
 838       }
 839       NEXT_INSN;
 840
 841     insn_laload:
 842       {
 843         jint index = POPI();
 844         jlongArray arr = (jlongArray) POPA();
 845         NULLARRAYCHECK (arr);
 846         ARRAYBOUNDSCHECK (arr, index);
 847         PUSHL( elements(arr)[index] );
 848       }
 849       NEXT_INSN;
 850
 851     insn_faload:
 852       {
 853         jint index = POPI();
 854         jfloatArray arr = (jfloatArray) POPA();
 855         NULLARRAYCHECK (arr);
 856         ARRAYBOUNDSCHECK (arr, index);
 857         PUSHF( elements(arr)[index] );
 858       }
 859       NEXT_INSN;
 860
 861     insn_daload:
 862       {
 863         jint index = POPI();
 864         jdoubleArray arr = (jdoubleArray) POPA();
 865         NULLARRAYCHECK (arr);
 866         ARRAYBOUNDSCHECK (arr, index);
 867         PUSHD( elements(arr)[index] );
 868       }
 869       NEXT_INSN;
 870
 871     insn_aaload:
 872       {
 873         jint index = POPI();
 874         jobjectArray arr = (jobjectArray) POPA();
 875         NULLARRAYCHECK (arr);
 876         ARRAYBOUNDSCHECK (arr, index);
 877         PUSHA( elements(arr)[index] );
 878       }
 879       NEXT_INSN;
 880
 881     insn_baload:
 882       {
 883         jint index = POPI();
 884         jbyteArray arr = (jbyteArray) POPA();
 885         NULLARRAYCHECK (arr);
 886         ARRAYBOUNDSCHECK (arr, index);
 887         PUSHI( elements(arr)[index] );
 888       }
 889       NEXT_INSN;
 890
 891     insn_caload:
 892       {
 893         jint index = POPI();
 894         jcharArray arr = (jcharArray) POPA();
 895         NULLARRAYCHECK (arr);
 896         ARRAYBOUNDSCHECK (arr, index);
 897         PUSHI( elements(arr)[index] );
 898       }
 899       NEXT_INSN;
 900
 901     insn_saload:
 902       {
 903         jint index = POPI();
 904         jshortArray arr = (jshortArray) POPA();
 905         NULLARRAYCHECK (arr);
 906         ARRAYBOUNDSCHECK (arr, index);
 907         PUSHI( elements(arr)[index] );
 908       }
 909       NEXT_INSN;
 910
 911     insn_istore:
 912       STOREI (GET1U ());
 913       NEXT_INSN;
 914
 915     insn_lstore:
 916       STOREL (GET1U ());
 917       NEXT_INSN;
 918
 919     insn_fstore:
 920       STOREF (GET1U ());
 921       NEXT_INSN;
 922
 923     insn_dstore:
 924       STORED (GET1U ());
 925       NEXT_INSN;
 926
 927     insn_astore:
 928       STOREA (GET1U ());
 929       NEXT_INSN;
 930
 931     insn_istore_0:
 932       STOREI (0);
 933       NEXT_INSN;
 934
 935     insn_istore_1:
 936       STOREI (1);
 937       NEXT_INSN;
 938
 939     insn_istore_2:
 940       STOREI (2);
 941       NEXT_INSN;
 942
 943     insn_istore_3:
 944       STOREI (3);
 945       NEXT_INSN;
 946
 947     insn_lstore_0:
 948       STOREL (0);
 949       NEXT_INSN;
 950
 951     insn_lstore_1:
 952       STOREL (1);
 953       NEXT_INSN;
 954
 955     insn_lstore_2:
 956       STOREL (2);
 957       NEXT_INSN;
 958
 959     insn_lstore_3:
 960       STOREL (3);
 961       NEXT_INSN;
 962
 963     insn_fstore_0:
 964       STOREF (0);
 965       NEXT_INSN;
 966
 967     insn_fstore_1:
 968       STOREF (1);
 969       NEXT_INSN;
 970
 971     insn_fstore_2:
 972       STOREF (2);
 973       NEXT_INSN;
 974
 975     insn_fstore_3:
 976       STOREF (3);
 977       NEXT_INSN;
 978
 979     insn_dstore_0:
 980       STORED (0);
 981       NEXT_INSN;
 982
 983     insn_dstore_1:
 984       STORED (1);
 985       NEXT_INSN;
 986
 987     insn_dstore_2:
 988       STORED (2);
 989       NEXT_INSN;
 990
 991     insn_dstore_3:
 992       STORED (3);
 993       NEXT_INSN;
 994
 995     insn_astore_0:
 996       STOREA(0);
 997       NEXT_INSN;
 998
 999     insn_astore_1:
1000       STOREA(1);
1001       NEXT_INSN;
1002
1003     insn_astore_2:
1004       STOREA(2);
1005       NEXT_INSN;
1006
1007     insn_astore_3:
1008       STOREA(3);
1009       NEXT_INSN;
1010
1011     insn_iastore:
1012       {
1013         jint value = POPI();
1014         jint index  = POPI();
1015         jintArray arr = (jintArray) POPA();
1016         NULLARRAYCHECK (arr);
1017         ARRAYBOUNDSCHECK (arr, index);
1018         elements(arr)[index] = value;
1019       }
1020       NEXT_INSN;
1021
1022     insn_lastore:
1023       {
1024         jlong value = POPL();
1025         jint index  = POPI();
1026         jlongArray arr = (jlongArray) POPA();
1027         NULLARRAYCHECK (arr);
1028         ARRAYBOUNDSCHECK (arr, index);
1029         elements(arr)[index] = value;
1030       }
1031       NEXT_INSN;
1032
1033     insn_fastore:
1034       {
1035         jfloat value = POPF();
1036         jint index  = POPI();
1037         jfloatArray arr = (jfloatArray) POPA();
1038         NULLARRAYCHECK (arr);
1039         ARRAYBOUNDSCHECK (arr, index);
1040         elements(arr)[index] = value;
1041       }
1042       NEXT_INSN;
1043
1044     insn_dastore:
1045       {
1046         jdouble value = POPD();
1047         jint index  = POPI();
1048         jdoubleArray arr = (jdoubleArray) POPA();
1049         NULLARRAYCHECK (arr);
1050         ARRAYBOUNDSCHECK (arr, index);
1051         elements(arr)[index] = value;
1052       }
1053       NEXT_INSN;
1054
1055     insn_aastore:
1056       {
1057         jobject value = POPA();
1058         jint index  = POPI();
1059         jobjectArray arr = (jobjectArray) POPA();
1060         NULLARRAYCHECK (arr);
1061         ARRAYBOUNDSCHECK (arr, index);
1062         _Jv_CheckArrayStore (arr, value);
1063         elements(arr)[index] = value;
1064       }
1065       NEXT_INSN;
1066
1067     insn_bastore:
1068       {
1069         jbyte value = (jbyte) POPI();
1070         jint index  = POPI();
1071         jbyteArray arr = (jbyteArray) POPA();
1072         NULLARRAYCHECK (arr);
1073         ARRAYBOUNDSCHECK (arr, index);
1074         elements(arr)[index] = value;
1075       }
1076       NEXT_INSN;
1077
1078     insn_castore:
1079       {
1080         jchar value = (jchar) POPI();
1081         jint index  = POPI();
1082         jcharArray arr = (jcharArray) POPA();
1083         NULLARRAYCHECK (arr);
1084         ARRAYBOUNDSCHECK (arr, index);
1085         elements(arr)[index] = value;
1086       }
1087       NEXT_INSN;
1088
1089     insn_sastore:
1090       {
1091         jshort value = (jshort) POPI();
1092         jint index  = POPI();
1093         jshortArray arr = (jshortArray) POPA();
1094         NULLARRAYCHECK (arr);
1095         ARRAYBOUNDSCHECK (arr, index);
1096         elements(arr)[index] = value;
1097       }
1098       NEXT_INSN;
1099
1100     insn_pop:
1101       sp -= 1;
1102       NEXT_INSN;
1103
1104     insn_pop2:
1105       sp -= 2;
1106       NEXT_INSN;
1107
1108     insn_dup:
1109       sp[0] = sp[-1];
1110       sp += 1;
1111       NEXT_INSN;
1112
1113     insn_dup_x1:
1114       dupx (sp, 1, 1); sp+=1;
1115       NEXT_INSN;
1116
1117     insn_dup_x2:
1118       dupx (sp, 1, 2); sp+=1;
1119       NEXT_INSN;
1120
1121     insn_dup2:
1122       sp[0] = sp[-2];
1123       sp[1] = sp[-1];
1124       sp += 2;
1125       NEXT_INSN;
1126
1127     insn_dup2_x1:
1128       dupx (sp, 2, 1); sp+=2;
1129       NEXT_INSN;
1130
1131     insn_dup2_x2:
1132       dupx (sp, 2, 2); sp+=2;
1133       NEXT_INSN;
1134
1135     insn_swap:
1136       {
1137         jobject tmp1 = POPA();
1138         jobject tmp2 = POPA();
1139         PUSHA (tmp1);
1140         PUSHA (tmp2);
1141       }
1142       NEXT_INSN;
1143
1144     insn_iadd:
1145       BINOPI(+);
1146       NEXT_INSN;
1147
1148     insn_ladd:
1149       BINOPL(+);
1150       NEXT_INSN;
1151
1152     insn_fadd:
1153       BINOPF(+);
1154       NEXT_INSN;
1155
1156     insn_dadd:
1157       BINOPD(+);
1158       NEXT_INSN;
1159
1160     insn_isub:
1161       BINOPI(-);
1162       NEXT_INSN;
1163
1164     insn_lsub:
1165       BINOPL(-);
1166       NEXT_INSN;
1167
1168     insn_fsub:
1169       BINOPF(-);
1170       NEXT_INSN;
1171
1172     insn_dsub:
1173       BINOPD(-);
1174       NEXT_INSN;
1175
1176     insn_imul:
1177       BINOPI(*);
1178       NEXT_INSN;
1179
1180     insn_lmul:
1181       BINOPL(*);
1182       NEXT_INSN;
1183
1184     insn_fmul:
1185       BINOPF(*);
1186       NEXT_INSN;
1187
1188     insn_dmul:
1189       BINOPD(*);
1190       NEXT_INSN;
1191
1192     insn_idiv:
1193       {
1194         SAVE_PC();
1195         jint value2 = POPI();
1196         jint value1 = POPI();
1197         jint res = _Jv_divI (value1, value2);
1198         PUSHI (res);
1199       }
1200       NEXT_INSN;
1201
1202     insn_ldiv:
1203       {
1204         SAVE_PC();
1205         jlong value2 = POPL();
1206         jlong value1 = POPL();
1207         jlong res = _Jv_divJ (value1, value2);
1208         PUSHL (res);
1209       }
1210       NEXT_INSN;
1211
1212     insn_fdiv:
1213       {
1214         jfloat value2 = POPF();
1215         jfloat value1 = POPF();
1216         jfloat res = value1 / value2;
1217         PUSHF (res);
1218       }
1219       NEXT_INSN;
1220
1221     insn_ddiv:
1222       {
1223         jdouble value2 = POPD();
1224         jdouble value1 = POPD();
1225         jdouble res = value1 / value2;
1226         PUSHD (res);
1227       }
1228       NEXT_INSN;
1229
1230     insn_irem:
1231       {
1232         SAVE_PC();
1233         jint value2 = POPI();
1234         jint value1 =  POPI();
1235         jint res = _Jv_remI (value1, value2);
1236         PUSHI (res);
1237       }
1238       NEXT_INSN;
1239
1240     insn_lrem:
1241       {
1242         SAVE_PC();
1243         jlong value2 = POPL();
1244         jlong value1 = POPL();
1245         jlong res = _Jv_remJ (value1, value2);
1246         PUSHL (res);
1247       }
1248       NEXT_INSN;
1249
1250     insn_frem:
1251       {
1252         jfloat value2 = POPF();
1253         jfloat value1 = POPF();
1254         jfloat res    = __ieee754_fmod (value1, value2);
1255         PUSHF (res);
1256       }
1257       NEXT_INSN;
1258
1259     insn_drem:
1260       {
1261         jdouble value2 = POPD();
1262         jdouble value1 = POPD();
1263         jdouble res    = __ieee754_fmod (value1, value2);
1264         PUSHD (res);
1265       }
1266       NEXT_INSN;
1267
1268     insn_ineg:
1269       {
1270         jint value = POPI();
1271         PUSHI (value * -1);
1272       }
1273       NEXT_INSN;
1274
1275     insn_lneg:
1276       {
1277         jlong value = POPL();
1278         PUSHL (value * -1);
1279       }
1280       NEXT_INSN;
1281
1282     insn_fneg:
1283       {
1284         jfloat value = POPF();
1285         PUSHF (value * -1);
1286       }
1287       NEXT_INSN;
1288
1289     insn_dneg:
1290       {
1291         jdouble value = POPD();
1292         PUSHD (value * -1);
1293       }
1294       NEXT_INSN;
1295
1296     insn_ishl:
1297       {
1298         jint shift = (POPI() & 0x1f);
1299         jint value = POPI();
1300         PUSHI (value << shift);
1301       }
1302       NEXT_INSN;
1303
1304     insn_lshl:
1305       {
1306         jint shift = (POPI() & 0x3f);
1307         jlong value = POPL();
1308         PUSHL (value << shift);
1309       }
1310       NEXT_INSN;
1311
1312     insn_ishr:
1313       {
1314         jint shift = (POPI() & 0x1f);
1315         jint value = POPI();
1316         PUSHI (value >> shift);
1317       }
1318       NEXT_INSN;
1319
1320     insn_lshr:
1321       {
1322         jint shift = (POPI() & 0x3f);
1323         jlong value = POPL();
1324         PUSHL (value >> shift);
1325       }
1326       NEXT_INSN;
1327
1328     insn_iushr:
1329       {
1330         jint shift = (POPI() & 0x1f);
1331         _Jv_uint value = (_Jv_uint) POPI();
1332         PUSHI ((jint) (value >> shift));
1333       }
1334       NEXT_INSN;
1335
1336     insn_lushr:
1337       {
1338         jint shift = (POPI() & 0x3f);
1339         _Jv_ulong value = (_Jv_ulong) POPL();
1340         PUSHL ((jlong) (value >> shift));
1341       }
1342       NEXT_INSN;
1343
1344     insn_iand:
1345       BINOPI (&);
1346       NEXT_INSN;
1347
1348     insn_land:
1349       BINOPL (&);
1350       NEXT_INSN;
1351
1352     insn_ior:
1353       BINOPI (|);
1354       NEXT_INSN;
1355
1356     insn_lor:
1357       BINOPL (|);
1358       NEXT_INSN;
1359
1360     insn_ixor:
1361       BINOPI (^);
1362       NEXT_INSN;
1363
1364     insn_lxor:
1365       BINOPL (^);
1366       NEXT_INSN;
1367
1368     insn_iinc:
1369       {
1370         jint index  = GET1U ();
1371         jint amount = GET1S ();
1372         locals[index].i += amount;
1373       }
1374       NEXT_INSN;
1375
1376     insn_i2l:
1377       {jlong value = POPI(); PUSHL (value);}
1378       NEXT_INSN;
1379
1380     insn_i2f:
1381       {jfloat value = POPI(); PUSHF (value);}
1382       NEXT_INSN;
1383
1384     insn_i2d:
1385       {jdouble value = POPI(); PUSHD (value);}
1386       NEXT_INSN;
1387
1388     insn_l2i:
1389       {jint value = POPL(); PUSHI (value);}
1390       NEXT_INSN;
1391
1392     insn_l2f:
1393       {jfloat value = POPL(); PUSHF (value);}
1394       NEXT_INSN;
1395
1396     insn_l2d:
1397       {jdouble value = POPL(); PUSHD (value);}
1398       NEXT_INSN;
1399
1400     insn_f2i:
1401       {
1402         using namespace java::lang;
1403         jint value = convert (POPF (), Integer::MIN_VALUE, Integer::MAX_VALUE);
1404         PUSHI(value);
1405       }
1406       NEXT_INSN;
1407
1408     insn_f2l:
1409       {
1410         using namespace java::lang;
1411         jlong value = convert (POPF (), Long::MIN_VALUE, Long::MAX_VALUE);
1412         PUSHL(value);
1413       }
1414       NEXT_INSN;
1415
1416     insn_f2d:
1417       { jdouble value = POPF (); PUSHD(value); }
1418       NEXT_INSN;
1419
1420     insn_d2i:
1421       {
1422         using namespace java::lang;
1423         jint value = convert (POPD (), Integer::MIN_VALUE, Integer::MAX_VALUE);
1424         PUSHI(value);
1425       }
1426       NEXT_INSN;
1427
1428     insn_d2l:
1429       {
1430         using namespace java::lang;
1431         jlong value = convert (POPD (), Long::MIN_VALUE, Long::MAX_VALUE);
1432         PUSHL(value);
1433       }
1434       NEXT_INSN;
1435
1436     insn_d2f:
1437       { jfloat value = POPD (); PUSHF(value); }
1438       NEXT_INSN;
1439
1440     insn_i2b:
1441       { jbyte value = POPI (); PUSHI(value); }
1442       NEXT_INSN;
1443
1444     insn_i2c:
1445       { jchar value = POPI (); PUSHI(value); }
1446       NEXT_INSN;
1447
1448     insn_i2s:
1449       { jshort value = POPI (); PUSHI(value); }
1450       NEXT_INSN;
1451
1452     insn_lcmp:
1453       {
1454         jlong value2 = POPL ();
1455         jlong value1 = POPL ();
1456         if (value1 > value2)
1457           { PUSHI (1); }
1458         else if (value1 == value2)
1459           { PUSHI (0); }
1460         else
1461           { PUSHI (-1); }
1462       }
1463       NEXT_INSN;
1464
1465     insn_fcmpl:
1466       tmpval = -1;
1467       goto fcmp;
1468
1469     insn_fcmpg:
1470       tmpval = 1;
1471
1472     fcmp:
1473       {
1474         jfloat value2 = POPF ();
1475         jfloat value1 = POPF ();
1476         if (value1 > value2)
1477           PUSHI (1);
1478         else if (value1 == value2)
1479           PUSHI (0);
1480         else if (value1 < value2)
1481           PUSHI (-1);
1482         else
1483           PUSHI (tmpval);
1484       }
1485       NEXT_INSN;
1486
1487     insn_dcmpl:
1488       tmpval = -1;
1489       goto dcmp;
1490
1491     insn_dcmpg:
1492       tmpval = 1;
1493
1494     dcmp:
1495       {
1496         jdouble value2 = POPD ();
1497         jdouble value1 = POPD ();
1498         if (value1 > value2)
1499           PUSHI (1);
1500         else if (value1 == value2)
1501           PUSHI (0);
1502         else if (value1 < value2)
1503           PUSHI (-1);
1504         else
1505           PUSHI (tmpval);
1506       }
1507       NEXT_INSN;
1508
1509     insn_ifeq:
1510       {
1511         if (POPI() == 0)
1512           TAKE_GOTO;
1513         else
1514           SKIP_GOTO;
1515       }
1516       NEXT_INSN;
1517
1518     insn_ifne:
1519       {
1520         if (POPI() != 0)
1521           TAKE_GOTO;
1522         else
1523           SKIP_GOTO;
1524       }
1525       NEXT_INSN;
1526
1527     insn_iflt:
1528       {
1529         if (POPI() < 0)
1530           TAKE_GOTO;
1531         else
1532           SKIP_GOTO;
1533       }
1534       NEXT_INSN;
1535
1536     insn_ifge:
1537       {
1538         if (POPI() >= 0)
1539           TAKE_GOTO;
1540         else
1541           SKIP_GOTO;
1542       }
1543       NEXT_INSN;
1544
1545     insn_ifgt:
1546       {
1547         if (POPI() > 0)
1548           TAKE_GOTO;
1549         else
1550           SKIP_GOTO;
1551       }
1552       NEXT_INSN;
1553
1554     insn_ifle:
1555       {
1556         if (POPI() <= 0)
1557           TAKE_GOTO;
1558         else
1559           SKIP_GOTO;
1560       }
1561       NEXT_INSN;
1562
1563     insn_if_icmpeq:
1564       {
1565         jint value2 = POPI();
1566         jint value1 = POPI();
1567         if (value1 == value2)
1568           TAKE_GOTO;
1569         else
1570           SKIP_GOTO;
1571       }
1572       NEXT_INSN;
1573
1574     insn_if_icmpne:
1575       {
1576         jint value2 = POPI();
1577         jint value1 = POPI();
1578         if (value1 != value2)
1579           TAKE_GOTO;
1580         else
1581           SKIP_GOTO;
1582       }
1583       NEXT_INSN;
1584
1585     insn_if_icmplt:
1586       {
1587         jint value2 = POPI();
1588         jint value1 = POPI();
1589         if (value1 < value2)
1590           TAKE_GOTO;
1591         else
1592           SKIP_GOTO;
1593       }
1594       NEXT_INSN;
1595
1596     insn_if_icmpge:
1597       {
1598         jint value2 = POPI();
1599         jint value1 = POPI();
1600         if (value1 >= value2)
1601           TAKE_GOTO;
1602         else
1603           SKIP_GOTO;
1604       }
1605       NEXT_INSN;
1606
1607     insn_if_icmpgt:
1608       {
1609         jint value2 = POPI();
1610         jint value1 = POPI();
1611         if (value1 > value2)
1612           TAKE_GOTO;
1613         else
1614           SKIP_GOTO;
1615       }
1616       NEXT_INSN;
1617
1618     insn_if_icmple:
1619       {
1620         jint value2 = POPI();
1621         jint value1 = POPI();
1622         if (value1 <= value2)
1623           TAKE_GOTO;
1624         else
1625           SKIP_GOTO;
1626       }
1627       NEXT_INSN;
1628
1629     insn_if_acmpeq:
1630       {
1631         jobject value2 = POPA();
1632         jobject value1 = POPA();
1633         if (value1 == value2)
1634           TAKE_GOTO;
1635         else
1636           SKIP_GOTO;
1637       }
1638       NEXT_INSN;
1639
1640     insn_if_acmpne:
1641       {
1642         jobject value2 = POPA();
1643         jobject value1 = POPA();
1644         if (value1 != value2)
1645           TAKE_GOTO;
1646         else
1647           SKIP_GOTO;
1648       }
1649       NEXT_INSN;
1650
1651     insn_goto_w:
1652 #ifndef DIRECT_THREADED
1653       // For direct threaded, goto and goto_w are the same.
1654       pc = pc - 1 + get4 (pc);
1655       NEXT_INSN;
1656 #endif /* DIRECT_THREADED */
1657     insn_goto:
1658       TAKE_GOTO;
1659       NEXT_INSN;
1660
1661     insn_jsr_w:
1662 #ifndef DIRECT_THREADED
1663       // For direct threaded, jsr and jsr_w are the same.
1664       {
1665         pc_t next = pc - 1 + get4 (pc);
1666         pc += 4;
1667         PUSHA ((jobject) pc);
1668         pc = next;
1669       }
1670       NEXT_INSN;
1671 #endif /* DIRECT_THREADED */
1672     insn_jsr:
1673       {
1674         pc_t next = GOTO_VAL();
1675         SKIP_GOTO;
1676         PUSHA ((jobject) pc);
1677         pc = next;
1678       }
1679       NEXT_INSN;
1680
1681     insn_ret:
1682       {
1683         jint index = GET1U ();
1684         pc = (pc_t) PEEKA (index);
1685       }
1686       NEXT_INSN;
1687
1688     insn_tableswitch:
1689       {
1690 #ifdef DIRECT_THREADED
1691         void *def = (pc++)->datum;
1692
1693         int index = POPI();
1694
1695         jint low = INTVAL ();
1696         jint high = INTVAL ();
1697
1698         if (index < low || index > high)
1699           pc = (insn_slot *) def;
1700         else
1701           pc = (insn_slot *) ((pc + index - low)->datum);
1702 #else
1703         pc_t base_pc = pc - 1;
1704         int index = POPI ();
1705
1706         pc_t base = (pc_t) meth->bytecode ();
1707         while ((pc - base) % 4 != 0)
1708           ++pc;
1709
1710         jint def = get4 (pc);
1711         jint low = get4 (pc + 4);
1712         jint high = get4 (pc + 8);
1713         if (index < low || index > high)
1714           pc = base_pc + def;
1715         else
1716           pc = base_pc + get4 (pc + 4 * (index - low + 3));
1717 #endif /* DIRECT_THREADED */
1718       }
1719       NEXT_INSN;
1720
1721     insn_lookupswitch:
1722       {
1723 #ifdef DIRECT_THREADED
1724         void *def = (pc++)->insn;
1725
1726         int index = POPI();
1727
1728         jint npairs = INTVAL ();
1729
1730         int max = npairs - 1;
1731         int min = 0;
1732
1733         // Simple binary search...
1734         while (min < max)
1735           {
1736             int half = (min + max) / 2;
1737             int match = pc[2 * half].int_val;
1738
1739             if (index == match)
1740               {
1741                 // Found it.
1742                 pc = (insn_slot *) pc[2 * half + 1].datum;
1743                 NEXT_INSN;
1744               }
1745             else if (index < match)
1746               // We can use HALF - 1 here because we check again on
1747               // loop exit.
1748               max = half - 1;
1749             else
1750               // We can use HALF + 1 here because we check again on
1751               // loop exit.
1752               min = half + 1;
1753           }
1754         if (index == pc[2 * min].int_val)
1755           pc = (insn_slot *) pc[2 * min + 1].datum;
1756         else
1757           pc = (insn_slot *) def;
1758 #else
1759         unsigned char *base_pc = pc-1;
1760         int index = POPI();
1761
1762         unsigned char* base = meth->bytecode ();
1763         while ((pc-base) % 4 != 0)
1764           ++pc;
1765
1766         jint def     = get4 (pc);
1767         jint npairs  = get4 (pc+4);
1768
1769         int max = npairs-1;
1770         int min = 0;
1771
1772         // Simple binary search...
1773         while (min < max)
1774           {
1775             int half = (min+max)/2;
1776             int match = get4 (pc+ 4*(2 + 2*half));
1777
1778             if (index == match)
1779               min = max = half;
1780             else if (index < match)
1781               // We can use HALF - 1 here because we check again on
1782               // loop exit.
1783               max = half - 1;
1784             else
1785               // We can use HALF + 1 here because we check again on
1786               // loop exit.
1787               min = half + 1;
1788           }
1789
1790         if (index == get4 (pc+ 4*(2 + 2*min)))
1791           pc = base_pc + get4 (pc+ 4*(2 + 2*min + 1));
1792         else
1793           pc = base_pc + def;
1794 #endif /* DIRECT_THREADED */
1795       }
1796       NEXT_INSN;
1797
1798     insn_areturn:
1799       *(jobject *) retp = POPA ();
1800       return;
1801
1802     insn_lreturn:
1803       *(jlong *) retp = POPL ();
1804       return;
1805
1806     insn_freturn:
1807       *(jfloat *) retp = POPF ();
1808       return;
1809
1810     insn_dreturn:
1811       *(jdouble *) retp = POPD ();
1812       return;
1813
1814     insn_ireturn:
1815       *(jint *) retp = POPI ();
1816       return;
1817
1818     insn_return:
1819       return;
1820
1821     insn_getstatic:
1822       {
1823         jint fieldref_index = GET2U ();
1824         SAVE_PC(); // Constant pool resolution could throw.
1825         _Jv_Linker::resolve_pool_entry (meth->defining_class, fieldref_index);
1826         _Jv_Field *field = pool_data[fieldref_index].field;
1827
1828         if ((field->flags & Modifier::STATIC) == 0)
1829           throw_incompatible_class_change_error
1830             (JvNewStringLatin1 ("field no longer static"));
1831
1832         jclass type = field->type;
1833
1834         // We rewrite the instruction once we discover what it refers
1835         // to.
1836         void *newinsn = NULL;
1837         if (type->isPrimitive ())
1838           {
1839             switch (type->size_in_bytes)
1840               {
1841               case 1:
1842                 PUSHI (*field->u.byte_addr);
1843                 newinsn = AMPAMP (getstatic_resolved_1);
1844                 break;
1845
1846               case 2:
1847                 if (type == JvPrimClass (char))
1848                   {
1849                     PUSHI (*field->u.char_addr);
1850                     newinsn = AMPAMP (getstatic_resolved_char);
1851                   }
1852                 else
1853                   {
1854                     PUSHI (*field->u.short_addr);
1855                     newinsn = AMPAMP (getstatic_resolved_short);
1856                   }
1857                 break;
1858
1859               case 4:
1860                 PUSHI(*field->u.int_addr);
1861                 newinsn = AMPAMP (getstatic_resolved_4);
1862                 break;
1863
1864               case 8:
1865                 PUSHL(*field->u.long_addr);
1866                 newinsn = AMPAMP (getstatic_resolved_8);
1867                 break;
1868               }
1869           }
1870         else
1871           {
1872             PUSHA(*field->u.object_addr);
1873             newinsn = AMPAMP (getstatic_resolved_obj);
1874           }
1875
1876 #ifdef DIRECT_THREADED
1877         REWRITE_INSN (newinsn, datum, field->u.addr);
1878 #endif /* DIRECT_THREADED */
1879       }
1880       NEXT_INSN;
1881
1882 #ifdef DIRECT_THREADED
1883     getstatic_resolved_1:
1884       PUSHI (*(jbyte *) AVAL ());
1885       NEXT_INSN;
1886
1887     getstatic_resolved_char:
1888       PUSHI (*(jchar *) AVAL ());
1889       NEXT_INSN;
1890
1891     getstatic_resolved_short:
1892       PUSHI (*(jshort *) AVAL ());
1893       NEXT_INSN;
1894
1895     getstatic_resolved_4:
1896       PUSHI (*(jint *) AVAL ());
1897       NEXT_INSN;
1898
1899     getstatic_resolved_8:
1900       PUSHL (*(jlong *) AVAL ());
1901       NEXT_INSN;
1902
1903     getstatic_resolved_obj:
1904       PUSHA (*(jobject *) AVAL ());
1905       NEXT_INSN;
1906 #endif /* DIRECT_THREADED */
1907
1908     insn_getfield:
1909       {
1910         SAVE_PC();
1911         jint fieldref_index = GET2U ();
1912         _Jv_Linker::resolve_pool_entry (meth->defining_class, fieldref_index);
1913         _Jv_Field *field = pool_data[fieldref_index].field;
1914
1915         if ((field->flags & Modifier::STATIC) != 0)
1916           throw_incompatible_class_change_error
1917             (JvNewStringLatin1 ("field is static"));
1918
1919         jclass type = field->type;
1920         jint field_offset = field->u.boffset;
1921
1922         jobject obj   = POPA();
1923         NULLCHECK(obj);
1924
1925         void *newinsn = NULL;
1926         _Jv_value *val = (_Jv_value *) ((char *)obj + field_offset);
1927         if (type->isPrimitive ())
1928           {
1929             switch (type->size_in_bytes)
1930               {
1931               case 1:
1932                 PUSHI (val->byte_value);
1933                 newinsn = AMPAMP (getfield_resolved_1);
1934                 break;
1935
1936               case 2:
1937                 if (type == JvPrimClass (char))
1938                   {
1939                     PUSHI (val->char_value);
1940                     newinsn = AMPAMP (getfield_resolved_char);
1941                   }
1942                 else
1943                   {
1944                     PUSHI (val->short_value);
1945                     newinsn = AMPAMP (getfield_resolved_short);
1946                   }
1947                 break;
1948
1949               case 4:
1950                 PUSHI (val->int_value);
1951                 newinsn = AMPAMP (getfield_resolved_4);
1952                 break;
1953
1954               case 8:
1955                 PUSHL (val->long_value);
1956                 newinsn = AMPAMP (getfield_resolved_8);
1957                 break;
1958               }
1959           }
1960         else
1961           {
1962             PUSHA (val->object_value);
1963             newinsn = AMPAMP (getfield_resolved_obj);
1964           }
1965
1966 #ifdef DIRECT_THREADED
1967         REWRITE_INSN (newinsn, int_val, field_offset);
1968 #endif /* DIRECT_THREADED */
1969       }
1970       NEXT_INSN;
1971
1972 #ifdef DIRECT_THREADED
1973     getfield_resolved_1:
1974       {
1975         char *obj = (char *) POPA ();
1976         NULLCHECK (obj);
1977         PUSHI (*(jbyte *) (obj + INTVAL ()));
1978       }
1979       NEXT_INSN;
1980
1981     getfield_resolved_char:
1982       {
1983         char *obj = (char *) POPA ();
1984         NULLCHECK (obj);
1985         PUSHI (*(jchar *) (obj + INTVAL ()));
1986       }
1987       NEXT_INSN;
1988
1989     getfield_resolved_short:
1990       {
1991         char *obj = (char *) POPA ();
1992         NULLCHECK (obj);
1993         PUSHI (*(jshort *) (obj + INTVAL ()));
1994       }
1995       NEXT_INSN;
1996
1997     getfield_resolved_4:
1998       {
1999         char *obj = (char *) POPA ();
2000         NULLCHECK (obj);
2001         PUSHI (*(jint *) (obj + INTVAL ()));
2002       }
2003       NEXT_INSN;
2004
2005     getfield_resolved_8:
2006       {
2007         char *obj = (char *) POPA ();
2008         NULLCHECK (obj);
2009         PUSHL (*(jlong *) (obj + INTVAL ()));
2010       }
2011       NEXT_INSN;
2012
2013     getfield_resolved_obj:
2014       {
2015         char *obj = (char *) POPA ();
2016         NULLCHECK (obj);
2017         PUSHA (*(jobject *) (obj + INTVAL ()));
2018       }
2019       NEXT_INSN;
2020 #endif /* DIRECT_THREADED */
2021
2022     insn_putstatic:
2023       {
2024         SAVE_PC();
2025         jint fieldref_index = GET2U ();
2026         _Jv_Linker::resolve_pool_entry (meth->defining_class, fieldref_index);
2027         _Jv_Field *field = pool_data[fieldref_index].field;
2028
2029         jclass type = field->type;
2030
2031         // ResolvePoolEntry cannot check this
2032         if ((field->flags & Modifier::STATIC) == 0)
2033           throw_incompatible_class_change_error
2034             (JvNewStringLatin1 ("field no longer static"));
2035
2036         void *newinsn = NULL;
2037         if (type->isPrimitive ())
2038           {
2039             switch (type->size_in_bytes)
2040               {
2041               case 1:
2042                 {
2043                   jint value = POPI();
2044                   *field->u.byte_addr = value;
2045                   newinsn = AMPAMP (putstatic_resolved_1);
2046                   break;
2047                 }
2048
2049               case 2:
2050                 {
2051                   jint value = POPI();
2052                   *field->u.char_addr = value;
2053                   newinsn = AMPAMP (putstatic_resolved_2);
2054                   break;
2055                 }
2056
2057               case 4:
2058                 {
2059                   jint value = POPI();
2060                   *field->u.int_addr = value;
2061                   newinsn = AMPAMP (putstatic_resolved_4);
2062                   break;
2063                 }
2064
2065               case 8:
2066                 {
2067                   jlong value = POPL();
2068                   *field->u.long_addr = value;
2069                   newinsn = AMPAMP (putstatic_resolved_8);
2070                   break;
2071                 }
2072               }
2073           }
2074         else
2075           {
2076             jobject value = POPA();
2077             *field->u.object_addr = value;
2078             newinsn = AMPAMP (putstatic_resolved_obj);
2079           }
2080
2081 #ifdef DIRECT_THREADED
2082         REWRITE_INSN (newinsn, datum, field->u.addr);
2083 #endif /* DIRECT_THREADED */
2084       }
2085       NEXT_INSN;
2086
2087 #ifdef DIRECT_THREADED
2088     putstatic_resolved_1:
2089       *(jbyte *) AVAL () = POPI ();
2090       NEXT_INSN;
2091
2092     putstatic_resolved_2:
2093       *(jchar *) AVAL () = POPI ();
2094       NEXT_INSN;
2095
2096     putstatic_resolved_4:
2097       *(jint *) AVAL () = POPI ();
2098       NEXT_INSN;
2099
2100     putstatic_resolved_8:
2101       *(jlong *) AVAL () = POPL ();
2102       NEXT_INSN;
2103
2104     putstatic_resolved_obj:
2105       *(jobject *) AVAL () = POPA ();
2106       NEXT_INSN;
2107 #endif /* DIRECT_THREADED */
2108
2109     insn_putfield:
2110       {
2111         SAVE_PC();
2112         jint fieldref_index = GET2U ();
2113         _Jv_Linker::resolve_pool_entry (meth->defining_class, fieldref_index);
2114         _Jv_Field *field = pool_data[fieldref_index].field;
2115
2116         jclass type = field->type;
2117
2118         if ((field->flags & Modifier::STATIC) != 0)
2119           throw_incompatible_class_change_error
2120             (JvNewStringLatin1 ("field is static"));
2121
2122         jint field_offset = field->u.boffset;
2123
2124         void *newinsn = NULL;
2125         if (type->isPrimitive ())
2126           {
2127             switch (type->size_in_bytes)
2128               {
2129               case 1:
2130                 {
2131                   jint    value = POPI();
2132                   jobject obj   = POPA();
2133                   NULLCHECK(obj);
2134                   *(jbyte*) ((char*)obj + field_offset) = value;
2135                   newinsn = AMPAMP (putfield_resolved_1);
2136                   break;
2137                 }
2138
2139               case 2:
2140                 {
2141                   jint    value = POPI();
2142                   jobject obj   = POPA();
2143                   NULLCHECK(obj);
2144                   *(jchar*) ((char*)obj + field_offset) = value;
2145                   newinsn = AMPAMP (putfield_resolved_2);
2146                   break;
2147                 }
2148
2149               case 4:
2150                 {
2151                   jint    value = POPI();
2152                   jobject obj   = POPA();
2153                   NULLCHECK(obj);
2154                   *(jint*) ((char*)obj + field_offset) = value;
2155                   newinsn = AMPAMP (putfield_resolved_4);
2156                   break;
2157                 }
2158
2159               case 8:
2160                 {
2161                   jlong   value = POPL();
2162                   jobject obj   = POPA();
2163                   NULLCHECK(obj);
2164                   *(jlong*) ((char*)obj + field_offset) = value;
2165                   newinsn = AMPAMP (putfield_resolved_8);
2166                   break;
2167                 }
2168               }
2169           }
2170         else
2171           {
2172             jobject value = POPA();
2173             jobject obj   = POPA();
2174             NULLCHECK(obj);
2175             *(jobject*) ((char*)obj + field_offset) = value;
2176             newinsn = AMPAMP (putfield_resolved_obj);
2177           }
2178
2179 #ifdef DIRECT_THREADED
2180         REWRITE_INSN (newinsn, int_val, field_offset);
2181 #endif /* DIRECT_THREADED */
2182       }
2183       NEXT_INSN;
2184
2185 #ifdef DIRECT_THREADED
2186     putfield_resolved_1:
2187       {
2188         jint val = POPI ();
2189         char *obj = (char *) POPA ();
2190         NULLCHECK (obj);
2191         *(jbyte *) (obj + INTVAL ()) = val;
2192       }
2193       NEXT_INSN;
2194
2195     putfield_resolved_2:
2196       {
2197         jint val = POPI ();
2198         char *obj = (char *) POPA ();
2199         NULLCHECK (obj);
2200         *(jchar *) (obj + INTVAL ()) = val;
2201       }
2202       NEXT_INSN;
2203
2204     putfield_resolved_4:
2205       {
2206         jint val = POPI ();
2207         char *obj = (char *) POPA ();
2208         NULLCHECK (obj);
2209         *(jint *) (obj + INTVAL ()) = val;
2210       }
2211       NEXT_INSN;
2212
2213     putfield_resolved_8:
2214       {
2215         jlong val = POPL ();
2216         char *obj = (char *) POPA ();
2217         NULLCHECK (obj);
2218         *(jlong *) (obj + INTVAL ()) = val;
2219       }
2220       NEXT_INSN;
2221
2222     putfield_resolved_obj:
2223       {
2224         jobject val = POPA ();
2225         char *obj = (char *) POPA ();
2226         NULLCHECK (obj);
2227         *(jobject *) (obj + INTVAL ()) = val;
2228       }
2229       NEXT_INSN;
2230 #endif /* DIRECT_THREADED */
2231
2232     insn_invokespecial:
2233       {
2234         SAVE_PC();
2235         int index = GET2U ();
2236
2237         rmeth = (_Jv_Linker::resolve_pool_entry (meth->defining_class,
2238                                                    index)).rmethod;
2239
2240         sp -= rmeth->stack_item_count;
2241
2242         // We don't use NULLCHECK here because we can't rely on that
2243         // working for <init>.  So instead we do an explicit test.
2244         if (! sp[0].o)
2245           {
2246             SAVE_PC();
2247             throw_null_pointer_exception ();
2248           }
2249
2250         fun = (void (*)()) rmeth->method->ncode;
2251
2252 #ifdef DIRECT_THREADED
2253         // Rewrite instruction so that we use a faster pre-resolved
2254         // method.
2255         REWRITE_INSN (&&invokespecial_resolved, datum, rmeth);
2256 #endif /* DIRECT_THREADED */
2257       }
2258       goto perform_invoke;
2259
2260 #ifdef DIRECT_THREADED
2261     invokespecial_resolved:
2262       {
2263         SAVE_PC();
2264         rmeth = (_Jv_ResolvedMethod *) AVAL ();
2265         sp -= rmeth->stack_item_count;
2266         // We don't use NULLCHECK here because we can't rely on that
2267         // working for <init>.  So instead we do an explicit test.
2268         if (! sp[0].o)
2269           {
2270             throw_null_pointer_exception ();
2271           }
2272         fun = (void (*)()) rmeth->method->ncode;
2273       }
2274       goto perform_invoke;
2275 #endif /* DIRECT_THREADED */
2276
2277     insn_invokestatic:
2278       {
2279         SAVE_PC();
2280         int index = GET2U ();
2281
2282         rmeth = (_Jv_Linker::resolve_pool_entry (meth->defining_class,
2283                                                    index)).rmethod;
2284
2285         sp -= rmeth->stack_item_count;
2286
2287         fun = (void (*)()) rmeth->method->ncode;
2288
2289 #ifdef DIRECT_THREADED
2290         // Rewrite instruction so that we use a faster pre-resolved
2291         // method.
2292         REWRITE_INSN (&&invokestatic_resolved, datum, rmeth);
2293 #endif /* DIRECT_THREADED */
2294       }
2295       goto perform_invoke;
2296
2297 #ifdef DIRECT_THREADED
2298     invokestatic_resolved:
2299       {
2300         SAVE_PC();
2301         rmeth = (_Jv_ResolvedMethod *) AVAL ();
2302         sp -= rmeth->stack_item_count;
2303         fun = (void (*)()) rmeth->method->ncode;
2304       }
2305       goto perform_invoke;
2306 #endif /* DIRECT_THREADED */
2307
2308     insn_invokeinterface:
2309       {
2310         SAVE_PC();
2311         int index = GET2U ();
2312
2313         rmeth = (_Jv_Linker::resolve_pool_entry (meth->defining_class,
2314                                                    index)).rmethod;
2315
2316         sp -= rmeth->stack_item_count;
2317
2318         jobject rcv = sp[0].o;
2319
2320         NULLCHECK (rcv);
2321
2322         fun = (void (*)())
2323           _Jv_LookupInterfaceMethod (rcv->getClass (),
2324                                      rmeth->method->name,
2325                                      rmeth->method->signature);
2326
2327 #ifdef DIRECT_THREADED
2328         // Rewrite instruction so that we use a faster pre-resolved
2329         // method.
2330         REWRITE_INSN (&&invokeinterface_resolved, datum, rmeth);
2331 #else
2332         // Skip dummy bytes.
2333         pc += 2;
2334 #endif /* DIRECT_THREADED */
2335       }
2336       goto perform_invoke;
2337
2338 #ifdef DIRECT_THREADED
2339     invokeinterface_resolved:
2340       {
2341         SAVE_PC();
2342         rmeth = (_Jv_ResolvedMethod *) AVAL ();
2343         sp -= rmeth->stack_item_count;
2344         jobject rcv = sp[0].o;
2345         NULLCHECK (rcv);
2346         fun = (void (*)())
2347           _Jv_LookupInterfaceMethod (rcv->getClass (),
2348                                      rmeth->method->name,
2349                                      rmeth->method->signature);
2350       }
2351       goto perform_invoke;
2352 #endif /* DIRECT_THREADED */
2353
2354     insn_new:
2355       {
2356         SAVE_PC();
2357         int index = GET2U ();
2358         jclass klass = (_Jv_Linker::resolve_pool_entry (meth->defining_class,
2359                                                           index)).clazz;
2360         /* VM spec, section 3.11.5 */
2361         if ((klass->getModifiers() & Modifier::ABSTRACT)
2362             || klass->isInterface())
2363           {
2364             jthrowable t = new java::lang::InstantiationException;
2365             INTERP_REPORT_EXCEPTION (t);
2366             throw t;
2367           }
2368         jobject res = _Jv_AllocObject (klass);
2369         PUSHA (res);
2370
2371 #ifdef DIRECT_THREADED
2372         REWRITE_INSN (&&new_resolved, datum, klass);
2373 #endif /* DIRECT_THREADED */
2374       }
2375       NEXT_INSN;
2376
2377 #ifdef DIRECT_THREADED
2378     new_resolved:
2379       {
2380         jclass klass = (jclass) AVAL ();
2381         jobject res = _Jv_AllocObject (klass);
2382         PUSHA (res);
2383       }
2384       NEXT_INSN;
2385 #endif /* DIRECT_THREADED */
2386
2387     insn_newarray:
2388       {
2389         int atype = GET1U ();
2390         int size  = POPI();
2391         jobject result = _Jv_NewArray (atype, size);
2392         PUSHA (result);
2393       }
2394       NEXT_INSN;
2395
2396     insn_anewarray:
2397       {
2398         SAVE_PC();
2399         int index = GET2U ();
2400         jclass klass = (_Jv_Linker::resolve_pool_entry (meth->defining_class,
2401                                                           index)).clazz;
2402         int size  = POPI();
2403         jobject result = _Jv_NewObjectArray (size, klass, 0);
2404         PUSHA (result);
2405
2406 #ifdef DIRECT_THREADED
2407         REWRITE_INSN (&&anewarray_resolved, datum, klass);
2408 #endif /* DIRECT_THREADED */
2409       }
2410       NEXT_INSN;
2411
2412 #ifdef DIRECT_THREADED
2413     anewarray_resolved:
2414       {
2415         jclass klass = (jclass) AVAL ();
2416         int size = POPI ();
2417         jobject result = _Jv_NewObjectArray (size, klass, 0);
2418         PUSHA (result);
2419       }
2420       NEXT_INSN;
2421 #endif /* DIRECT_THREADED */
2422
2423     insn_arraylength:
2424       {
2425         __JArray *arr = (__JArray*)POPA();
2426         NULLARRAYCHECK (arr);
2427         PUSHI (arr->length);
2428       }
2429       NEXT_INSN;
2430
2431     insn_athrow:
2432       {
2433         jobject value = POPA();
2434         jthrowable t = static_cast<jthrowable> (value);
2435         INTERP_REPORT_EXCEPTION (t);
2436         throw t;
2437       }
2438       NEXT_INSN;
2439
2440     insn_checkcast:
2441       {
2442         SAVE_PC();
2443         jobject value = POPA();
2444         jint index = GET2U ();
2445         jclass to = (_Jv_Linker::resolve_pool_entry (meth->defining_class,
2446                                                        index)).clazz;
2447
2448         value = (jobject) _Jv_CheckCast (to, value);
2449
2450         PUSHA (value);
2451
2452 #ifdef DIRECT_THREADED
2453         REWRITE_INSN (&&checkcast_resolved, datum, to);
2454 #endif /* DIRECT_THREADED */
2455       }
2456       NEXT_INSN;
2457
2458 #ifdef DIRECT_THREADED
2459     checkcast_resolved:
2460       {
2461         SAVE_PC();
2462         jobject value = POPA ();
2463         jclass to = (jclass) AVAL ();
2464         value = (jobject) _Jv_CheckCast (to, value);
2465         PUSHA (value);
2466       }
2467       NEXT_INSN;
2468 #endif /* DIRECT_THREADED */
2469
2470     insn_instanceof:
2471       {
2472         SAVE_PC();
2473         jobject value = POPA();
2474         jint index = GET2U ();
2475         jclass to = (_Jv_Linker::resolve_pool_entry (meth->defining_class,
2476                                                        index)).clazz;
2477         PUSHI (to->isInstance (value));
2478
2479 #ifdef DIRECT_THREADED
2480         REWRITE_INSN (&&instanceof_resolved, datum, to);
2481 #endif /* DIRECT_THREADED */
2482       }
2483       NEXT_INSN;
2484
2485 #ifdef DIRECT_THREADED
2486     instanceof_resolved:
2487       {
2488         jobject value = POPA ();
2489         jclass to = (jclass) AVAL ();
2490         PUSHI (to->isInstance (value));
2491       }
2492       NEXT_INSN;
2493 #endif /* DIRECT_THREADED */
2494
2495     insn_monitorenter:
2496       {
2497         jobject value = POPA();
2498         NULLCHECK(value);
2499         _Jv_MonitorEnter (value);
2500       }
2501       NEXT_INSN;
2502
2503     insn_monitorexit:
2504       {
2505         jobject value = POPA();
2506         NULLCHECK(value);
2507         _Jv_MonitorExit (value);
2508       }
2509       NEXT_INSN;
2510
2511     insn_ifnull:
2512       {
2513         jobject val = POPA();
2514         if (val == NULL)
2515           TAKE_GOTO;
2516         else
2517           SKIP_GOTO;
2518       }
2519       NEXT_INSN;
2520
2521     insn_ifnonnull:
2522       {
2523         jobject val = POPA();
2524         if (val != NULL)
2525           TAKE_GOTO;
2526         else
2527           SKIP_GOTO;
2528       }
2529       NEXT_INSN;
2530
2531     insn_multianewarray:
2532       {
2533         SAVE_PC();
2534         int kind_index = GET2U ();
2535         int dim        = GET1U ();
2536
2537         jclass type
2538           = (_Jv_Linker::resolve_pool_entry (meth->defining_class,
2539                                                kind_index)).clazz;
2540         jint *sizes    = (jint*) __builtin_alloca (sizeof (jint)*dim);
2541
2542         for (int i = dim - 1; i >= 0; i--)
2543           {
2544             sizes[i] = POPI ();
2545           }
2546
2547         jobject res    = _Jv_NewMultiArray (type,dim, sizes);
2548
2549         PUSHA (res);
2550       }
2551       NEXT_INSN;
2552
2553 #ifndef DIRECT_THREADED
2554     insn_wide:
2555       {
2556         jint the_mod_op = get1u (pc++);
2557         jint wide       = get2u (pc); pc += 2;
2558
2559         switch (the_mod_op)
2560           {
2561           case op_istore:
2562             STOREI (wide);
2563             NEXT_INSN;
2564
2565           case op_fstore:
2566             STOREF (wide);
2567             NEXT_INSN;
2568
2569           case op_astore:
2570             STOREA (wide);
2571             NEXT_INSN;
2572
2573           case op_lload:
2574             LOADL (wide);
2575             NEXT_INSN;
2576
2577           case op_dload:
2578             LOADD (wide);
2579             NEXT_INSN;
2580
2581           case op_iload:
2582             LOADI (wide);
2583             NEXT_INSN;
2584
2585           case op_fload:
2586             LOADF (wide);
2587             NEXT_INSN;
2588
2589           case op_aload:
2590             LOADA (wide);
2591             NEXT_INSN;
2592
2593           case op_lstore:
2594             STOREL (wide);
2595             NEXT_INSN;
2596
2597           case op_dstore:
2598             STORED (wide);
2599             NEXT_INSN;
2600
2601           case op_ret:
2602             pc = (unsigned char*) PEEKA (wide);
2603             NEXT_INSN;
2604
2605           case op_iinc:
2606             {
2607               jint amount = get2s (pc); pc += 2;
2608               jint value = PEEKI (wide);
2609               POKEI (wide, value+amount);
2610             }
2611             NEXT_INSN;
2612
2613           default:
2614             throw_internal_error ("illegal bytecode modified by wide");
2615           }
2616
2617       }
2618 #endif /* DIRECT_THREADED */
2619
2620     insn_breakpoint:
2621       {
2622         using namespace ::java::lang;
2623         jmethodID method = meth->self;
2624         jlocation location = meth->insn_index (pc - 1);
2625
2626         using namespace gnu::gcj::jvmti;
2627         Breakpoint *bp
2628           = BreakpointManager::getBreakpoint (reinterpret_cast<jlong> (method),
2629                                               location);
2630         JvAssert (bp != NULL);
2631
2632         // Save the insn here since the breakpoint could be removed
2633         // before the JVMTI notification returns.
2634         pc_t opc = reinterpret_cast<pc_t> (bp->getInsn ());
2635
2636         bp->execute ();
2637
2638         // Continue execution
2639 #ifdef DIRECT_THREADED
2640         goto *(opc->insn);
2641 #else
2642         goto *(insn_target[*opc]);
2643 #endif
2644       }
2645     }
2646   catch (java::lang::Throwable *ex)
2647     {
2648       // Check if the exception is handled and, if so, set the pc to the start
2649       // of the appropriate catch block.
2650       if (meth->check_handler (&pc, meth, ex))
2651         {
2652           sp = stack;
2653           sp++->o = ex; // Push exception.
2654 #ifdef DEBUG
2655           if (JVMTI_REQUESTED_EVENT (ExceptionCatch))
2656             {
2657               using namespace gnu::gcj::jvmti;
2658               jlong catch_meth = reinterpret_cast<jlong> (meth->get_method ());
2659               jlong catch_loc = meth->insn_index (pc);
2660               _Jv_JVMTI_PostEvent (JVMTI_EVENT_EXCEPTION_CATCH, thread,
2661                                    _Jv_GetCurrentJNIEnv (), catch_meth,
2662                                    catch_loc, ex);
2663             }
2664 #endif
2665           NEXT_INSN;
2666         }
2667
2668       // No handler, so re-throw.
2669       throw ex;
2670     }