/*
 * Copyright (c) 2001, 2016, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 *
 */

package sun.jvm.hotspot.interpreter;

import java.util.*;
import sun.jvm.hotspot.oops.*;
import sun.jvm.hotspot.runtime.*;
import sun.jvm.hotspot.utilities.*;

// Bytecodes specifies all bytecodes used in the VM and
// provides utility functions to get bytecode attributes.

public class Bytecodes {
  public static final int _illegal    =  -1;

  // Java bytecodes
  public static final int _nop                  =   0; // 0x00
  public static final int _aconst_null          =   1; // 0x01
  public static final int _iconst_m1            =   2; // 0x02
  public static final int _iconst_0             =   3; // 0x03
  public static final int _iconst_1             =   4; // 0x04
  public static final int _iconst_2             =   5; // 0x05
  public static final int _iconst_3             =   6; // 0x06
  public static final int _iconst_4             =   7; // 0x07
  public static final int _iconst_5             =   8; // 0x08
  public static final int _lconst_0             =   9; // 0x09
  public static final int _lconst_1             =  10; // 0x0a
  public static final int _fconst_0             =  11; // 0x0b
  public static final int _fconst_1             =  12; // 0x0c
  public static final int _fconst_2             =  13; // 0x0d
  public static final int _dconst_0             =  14; // 0x0e
  public static final int _dconst_1             =  15; // 0x0f
  public static final int _bipush               =  16; // 0x10
  public static final int _sipush               =  17; // 0x11
  public static final int _ldc                  =  18; // 0x12
  public static final int _ldc_w                =  19; // 0x13
  public static final int _ldc2_w               =  20; // 0x14
  public static final int _iload                =  21; // 0x15
  public static final int _lload                =  22; // 0x16
  public static final int _fload                =  23; // 0x17
  public static final int _dload                =  24; // 0x18
  public static final int _aload                =  25; // 0x19
  public static final int _iload_0              =  26; // 0x1a
  public static final int _iload_1              =  27; // 0x1b
  public static final int _iload_2              =  28; // 0x1c
  public static final int _iload_3              =  29; // 0x1d
  public static final int _lload_0              =  30; // 0x1e
  public static final int _lload_1              =  31; // 0x1f
  public static final int _lload_2              =  32; // 0x20
  public static final int _lload_3              =  33; // 0x21
  public static final int _fload_0              =  34; // 0x22
  public static final int _fload_1              =  35; // 0x23
  public static final int _fload_2              =  36; // 0x24
  public static final int _fload_3              =  37; // 0x25
  public static final int _dload_0              =  38; // 0x26
  public static final int _dload_1              =  39; // 0x27
  public static final int _dload_2              =  40; // 0x28
  public static final int _dload_3              =  41; // 0x29
  public static final int _aload_0              =  42; // 0x2a
  public static final int _aload_1              =  43; // 0x2b
  public static final int _aload_2              =  44; // 0x2c
  public static final int _aload_3              =  45; // 0x2d
  public static final int _iaload               =  46; // 0x2e
  public static final int _laload               =  47; // 0x2f
  public static final int _faload               =  48; // 0x30
  public static final int _daload               =  49; // 0x31
  public static final int _aaload               =  50; // 0x32
  public static final int _baload               =  51; // 0x33
  public static final int _caload               =  52; // 0x34
  public static final int _saload               =  53; // 0x35
  public static final int _istore               =  54; // 0x36
  public static final int _lstore               =  55; // 0x37
  public static final int _fstore               =  56; // 0x38
  public static final int _dstore               =  57; // 0x39
  public static final int _astore               =  58; // 0x3a
  public static final int _istore_0             =  59; // 0x3b
  public static final int _istore_1             =  60; // 0x3c
  public static final int _istore_2             =  61; // 0x3d
  public static final int _istore_3             =  62; // 0x3e
  public static final int _lstore_0             =  63; // 0x3f
  public static final int _lstore_1             =  64; // 0x40
  public static final int _lstore_2             =  65; // 0x41
  public static final int _lstore_3             =  66; // 0x42
  public static final int _fstore_0             =  67; // 0x43
  public static final int _fstore_1             =  68; // 0x44
  public static final int _fstore_2             =  69; // 0x45
  public static final int _fstore_3             =  70; // 0x46
  public static final int _dstore_0             =  71; // 0x47
  public static final int _dstore_1             =  72; // 0x48
  public static final int _dstore_2             =  73; // 0x49
  public static final int _dstore_3             =  74; // 0x4a
  public static final int _astore_0             =  75; // 0x4b
  public static final int _astore_1             =  76; // 0x4c
  public static final int _astore_2             =  77; // 0x4d
  public static final int _astore_3             =  78; // 0x4e
  public static final int _iastore              =  79; // 0x4f
  public static final int _lastore              =  80; // 0x50
  public static final int _fastore              =  81; // 0x51
  public static final int _dastore              =  82; // 0x52
  public static final int _aastore              =  83; // 0x53
  public static final int _bastore              =  84; // 0x54
  public static final int _castore              =  85; // 0x55
  public static final int _sastore              =  86; // 0x56
  public static final int _pop                  =  87; // 0x57
  public static final int _pop2                 =  88; // 0x58
  public static final int _dup                  =  89; // 0x59
  public static final int _dup_x1               =  90; // 0x5a
  public static final int _dup_x2               =  91; // 0x5b
  public static final int _dup2                 =  92; // 0x5c
  public static final int _dup2_x1              =  93; // 0x5d
  public static final int _dup2_x2              =  94; // 0x5e
  public static final int _swap                 =  95; // 0x5f
  public static final int _iadd                 =  96; // 0x60
  public static final int _ladd                 =  97; // 0x61
  public static final int _fadd                 =  98; // 0x62
  public static final int _dadd                 =  99; // 0x63
  public static final int _isub                 = 100; // 0x64
  public static final int _lsub                 = 101; // 0x65
  public static final int _fsub                 = 102; // 0x66
  public static final int _dsub                 = 103; // 0x67
  public static final int _imul                 = 104; // 0x68
  public static final int _lmul                 = 105; // 0x69
  public static final int _fmul                 = 106; // 0x6a
  public static final int _dmul                 = 107; // 0x6b
  public static final int _idiv                 = 108; // 0x6c
  public static final int _ldiv                 = 109; // 0x6d
  public static final int _fdiv                 = 110; // 0x6e
  public static final int _ddiv                 = 111; // 0x6f
  public static final int _irem                 = 112; // 0x70
  public static final int _lrem                 = 113; // 0x71
  public static final int _frem                 = 114; // 0x72
  public static final int _drem                 = 115; // 0x73
  public static final int _ineg                 = 116; // 0x74
  public static final int _lneg                 = 117; // 0x75
  public static final int _fneg                 = 118; // 0x76
  public static final int _dneg                 = 119; // 0x77
  public static final int _ishl                 = 120; // 0x78
  public static final int _lshl                 = 121; // 0x79
  public static final int _ishr                 = 122; // 0x7a
  public static final int _lshr                 = 123; // 0x7b
  public static final int _iushr                = 124; // 0x7c
  public static final int _lushr                = 125; // 0x7d
  public static final int _iand                 = 126; // 0x7e
  public static final int _land                 = 127; // 0x7f
  public static final int _ior                  = 128; // 0x80
  public static final int _lor                  = 129; // 0x81
  public static final int _ixor                 = 130; // 0x82
  public static final int _lxor                 = 131; // 0x83
  public static final int _iinc                 = 132; // 0x84
  public static final int _i2l                  = 133; // 0x85
  public static final int _i2f                  = 134; // 0x86
  public static final int _i2d                  = 135; // 0x87
  public static final int _l2i                  = 136; // 0x88
  public static final int _l2f                  = 137; // 0x89
  public static final int _l2d                  = 138; // 0x8a
  public static final int _f2i                  = 139; // 0x8b
  public static final int _f2l                  = 140; // 0x8c
  public static final int _f2d                  = 141; // 0x8d
  public static final int _d2i                  = 142; // 0x8e
  public static final int _d2l                  = 143; // 0x8f
  public static final int _d2f                  = 144; // 0x90
  public static final int _i2b                  = 145; // 0x91
  public static final int _i2c                  = 146; // 0x92
  public static final int _i2s                  = 147; // 0x93
  public static final int _lcmp                 = 148; // 0x94
  public static final int _fcmpl                = 149; // 0x95
  public static final int _fcmpg                = 150; // 0x96
  public static final int _dcmpl                = 151; // 0x97
  public static final int _dcmpg                = 152; // 0x98
  public static final int _ifeq                 = 153; // 0x99
  public static final int _ifne                 = 154; // 0x9a
  public static final int _iflt                 = 155; // 0x9b
  public static final int _ifge                 = 156; // 0x9c
  public static final int _ifgt                 = 157; // 0x9d
  public static final int _ifle                 = 158; // 0x9e
  public static final int _if_icmpeq            = 159; // 0x9f
  public static final int _if_icmpne            = 160; // 0xa0
  public static final int _if_icmplt            = 161; // 0xa1
  public static final int _if_icmpge            = 162; // 0xa2
  public static final int _if_icmpgt            = 163; // 0xa3
  public static final int _if_icmple            = 164; // 0xa4
  public static final int _if_acmpeq            = 165; // 0xa5
  public static final int _if_acmpne            = 166; // 0xa6
  public static final int _goto                 = 167; // 0xa7
  public static final int _jsr                  = 168; // 0xa8
  public static final int _ret                  = 169; // 0xa9
  public static final int _tableswitch          = 170; // 0xaa
  public static final int _lookupswitch         = 171; // 0xab
  public static final int _ireturn              = 172; // 0xac
  public static final int _lreturn              = 173; // 0xad
  public static final int _freturn              = 174; // 0xae
  public static final int _dreturn              = 175; // 0xaf
  public static final int _areturn              = 176; // 0xb0
  public static final int _return               = 177; // 0xb1
  public static final int _getstatic            = 178; // 0xb2
  public static final int _putstatic            = 179; // 0xb3
  public static final int _getfield             = 180; // 0xb4
  public static final int _putfield             = 181; // 0xb5
  public static final int _invokevirtual        = 182; // 0xb6
  public static final int _invokespecial        = 183; // 0xb7
  public static final int _invokestatic         = 184; // 0xb8
  public static final int _invokeinterface      = 185; // 0xb9
  public static final int _invokedynamic        = 186; // 0xba
  public static final int _new                  = 187; // 0xbb
  public static final int _newarray             = 188; // 0xbc
  public static final int _anewarray            = 189; // 0xbd
  public static final int _arraylength          = 190; // 0xbe
  public static final int _athrow               = 191; // 0xbf
  public static final int _checkcast            = 192; // 0xc0
  public static final int _instanceof           = 193; // 0xc1
  public static final int _monitorenter         = 194; // 0xc2
  public static final int _monitorexit          = 195; // 0xc3
  public static final int _wide                 = 196; // 0xc4
  public static final int _multianewarray       = 197; // 0xc5
  public static final int _ifnull               = 198; // 0xc6
  public static final int _ifnonnull            = 199; // 0xc7
  public static final int _goto_w               = 200; // 0xc8
  public static final int _jsr_w                = 201; // 0xc9
  public static final int _breakpoint           = 202; // 0xca

  public static final int number_of_java_codes  = 203;

  // JVM bytecodes
  public static final int _fast_agetfield       = number_of_java_codes;
  public static final int _fast_bgetfield       = 204;
  public static final int _fast_cgetfield       = 205;
  public static final int _fast_dgetfield       = 206;
  public static final int _fast_fgetfield       = 207;
  public static final int _fast_igetfield       = 208;
  public static final int _fast_lgetfield       = 209;
  public static final int _fast_sgetfield       = 210;
  public static final int _fast_aputfield       = 211;
  public static final int _fast_bputfield       = 212;
  public static final int _fast_zputfield       = 213;
  public static final int _fast_cputfield       = 214;
  public static final int _fast_dputfield       = 215;
  public static final int _fast_fputfield       = 216;
  public static final int _fast_iputfield       = 217;
  public static final int _fast_lputfield       = 218;
  public static final int _fast_sputfield       = 219;
  public static final int _fast_aload_0         = 220;
  public static final int _fast_iaccess_0       = 221;
  public static final int _fast_aaccess_0       = 222;
  public static final int _fast_faccess_0       = 223;
  public static final int _fast_iload           = 224;
  public static final int _fast_iload2          = 225;
  public static final int _fast_icaload         = 226;
  public static final int _fast_invokevfinal    = 227;
  public static final int _fast_linearswitch    = 228;
  public static final int _fast_binaryswitch    = 229;
  public static final int _fast_aldc            = 230;
  public static final int _fast_aldc_w          = 231;
  public static final int _return_register_finalizer = 232;
  public static final int _invokehandle         = 233;
  public static final int _shouldnotreachhere   = 234; // For debugging

  public static final int number_of_codes       = 235;

  // Flag bits derived from format strings, can_trap, can_rewrite, etc.:
  // semantic flags:
  static final int  _bc_can_trap      = 1<<0;     // bytecode execution can trap or block
  static final int  _bc_can_rewrite   = 1<<1;     // bytecode execution has an alternate form

  // format bits (determined only by the format string):
  static final int  _fmt_has_c        = 1<<2;     // constant, such as sipush "bcc"
  static final int  _fmt_has_j        = 1<<3;     // constant pool cache index, such as getfield "bjj"
  static final int  _fmt_has_k        = 1<<4;     // constant pool index, such as ldc "bk"
  static final int  _fmt_has_i        = 1<<5;     // local index, such as iload
  static final int  _fmt_has_o        = 1<<6;     // offset, such as ifeq
  static final int  _fmt_has_nbo      = 1<<7;     // contains native-order field(s)
  static final int  _fmt_has_u2       = 1<<8;     // contains double-byte field(s)
  static final int  _fmt_has_u4       = 1<<9;     // contains quad-byte field
  static final int  _fmt_not_variable = 1<<10;    // not of variable length (simple or wide)
  static final int  _fmt_not_simple   = 1<<11;    // either wide or variable length
  static final int  _all_fmt_bits     = (_fmt_not_simple*2 - _fmt_has_c);

  // Example derived format syndromes:
  static final int  _fmt_b      = _fmt_not_variable;
  static final int  _fmt_bc     = _fmt_b | _fmt_has_c;
  static final int  _fmt_bi     = _fmt_b | _fmt_has_i;
  static final int  _fmt_bkk    = _fmt_b | _fmt_has_k | _fmt_has_u2;
  static final int  _fmt_bJJ    = _fmt_b | _fmt_has_j | _fmt_has_u2 | _fmt_has_nbo;
  static final int  _fmt_bo2    = _fmt_b | _fmt_has_o | _fmt_has_u2;
  static final int  _fmt_bo4    = _fmt_b | _fmt_has_o | _fmt_has_u4;


  public static int specialLengthAt(Method method, int bci) {
    int code = codeAt(method, bci);
    switch (code) {
    case _wide:
      return wideLengthFor(method.getBytecodeOrBPAt(bci + 1));
    case _tableswitch:
      {
        int alignedBCI = Bits.roundTo(bci + 1, jintSize);
        int lo = method.getBytecodeIntArg(alignedBCI + 1*jintSize);
        int hi = method.getBytecodeIntArg(alignedBCI + 2*jintSize);
        return (alignedBCI - bci) + (3 + hi - lo + 1)*jintSize;
      }

    case _lookupswitch:      // fall through
    case _fast_binaryswitch: // fall through
    case _fast_linearswitch:
      {
        int alignedBCI = Bits.roundTo(bci + 1, jintSize);
        int npairs = method.getBytecodeIntArg(alignedBCI + jintSize);
        return (alignedBCI - bci) + (2 + 2*npairs)*jintSize;
      }

    }
    throw new RuntimeException("should not reach here");
  }

  // Conversion
  public static void check(int code) {
    if (Assert.ASSERTS_ENABLED) {
      Assert.that(isDefined(code), "illegal code " + code);
    }
  }
  public static void wideCheck(int code) {
    if (Assert.ASSERTS_ENABLED) {
      Assert.that(wideIsDefined(code), "illegal code " + code);
    }
  }

  
Fetches a bytecode, hiding breakpoints as necessary
/** Fetches a bytecode, hiding breakpoints as necessary */
public static int codeAt(Method method, int bci) { int res = codeOrBPAt(method, bci); if (res == _breakpoint) { res = method.getOrigBytecodeAt(bci); } return res; }
Fetches a bytecode or a breakpoint
/** Fetches a bytecode or a breakpoint */
public static int codeOrBPAt(Method method, int bci) { return method.getBytecodeOrBPAt(bci); } public static boolean isActiveBreakpointAt(Method method, int bci) { return (codeOrBPAt(method, bci) == _breakpoint); } // find a bytecode, behind a breakpoint if necessary: // FIXME: not yet implementable // static Code non_breakpoint_code_at(address bcp, Method* method = null); // Bytecode attributes public static boolean isDefined (int code) { return 0 <= code && code < number_of_codes && flags(code, false) != 0; } public static boolean wideIsDefined(int code) { return isDefined(code) && flags(code, true) != 0; } public static String name (int code) { check(code); return _name [code]; } public static String format (int code) { check(code); return _format [code]; } public static String wideFormat (int code) { wideCheck(code); return _wide_format [code]; } public static int resultType (int code) { check(code); return _result_type [code]; } public static int depth (int code) { check(code); return _depth [code]; } public static int lengthFor (int code) { check(code); return _lengths [code] & 0xF; } public static int wideLengthFor(int code) { check(code); return _lengths [code] >> 4; } public static boolean canTrap (int code) { check(code); return has_all_flags(code, _bc_can_trap, false); } public static int javaCode (int code) { check(code); return _java_code [code]; } public static boolean canRewrite (int code) { check(code); return has_all_flags(code, _bc_can_rewrite, false); } public static boolean native_byte_order(int code) { check(code); return has_all_flags(code, _fmt_has_nbo, false); } public static boolean uses_cp_cache (int code) { check(code); return has_all_flags(code, _fmt_has_j, false); } public static int lengthAt (Method method, int bci) { int l = lengthFor(codeAt(method, bci)); return l > 0 ? l : specialLengthAt(method, bci); } public static int javaLengthAt (Method method, int bci) { int l = lengthFor(javaCode(codeAt(method, bci))); return l > 0 ? l : specialLengthAt(method, bci); } public static boolean isJavaCode (int code) { return 0 <= code && code < number_of_java_codes; } public static boolean isFastCode (int code) { return number_of_java_codes <= code && code < number_of_codes; } public static boolean isAload (int code) { return (code == _aload || code == _aload_0 || code == _aload_1 || code == _aload_2 || code == _aload_3); } public static boolean isAstore (int code) { return (code == _astore || code == _astore_0 || code == _astore_1 || code == _astore_2 || code == _astore_3); } public static boolean isZeroConst (int code) { return (code == _aconst_null || code == _iconst_0 || code == _fconst_0 || code == _dconst_0); } static int flags (int code, boolean is_wide) { assert code == (code & 0xff) : "must be a byte"; return _flags[code + (is_wide ? 256 : 0)]; } static int format_bits (int code, boolean is_wide) { return flags(code, is_wide) & _all_fmt_bits; } static boolean has_all_flags (int code, int test_flags, boolean is_wide) { return (flags(code, is_wide) & test_flags) == test_flags; } static char compute_flags(String format) { return compute_flags(format, 0); } static char compute_flags(String format, int more_flags) { if (format == null) return 0; // not even more_flags int flags = more_flags; int fp = 0; if (format.length() == 0) { flags |= _fmt_not_simple; // but variable } else { switch (format.charAt(fp)) { case 'b': flags |= _fmt_not_variable; // but simple ++fp; // skip 'b' break; case 'w': flags |= _fmt_not_variable | _fmt_not_simple; ++fp; // skip 'w' assert(format.charAt(fp) == 'b') : "wide format must start with 'wb'"; ++fp; // skip 'b' break; } } boolean has_nbo = false, has_jbo = false; int has_size = 0; while (fp < format.length()) { int this_flag = 0; char fc = format.charAt(fp++); switch (fc) { case '_': continue; // ignore these case 'j': this_flag = _fmt_has_j; has_jbo = true; break; case 'k': this_flag = _fmt_has_k; has_jbo = true; break; case 'i': this_flag = _fmt_has_i; has_jbo = true; break; case 'c': this_flag = _fmt_has_c; has_jbo = true; break; case 'o': this_flag = _fmt_has_o; has_jbo = true; break; // uppercase versions mark native byte order (from Rewriter) // actually, only the 'J' case happens currently case 'J': this_flag = _fmt_has_j; has_nbo = true; break; case 'K': this_flag = _fmt_has_k; has_nbo = true; break; case 'I': this_flag = _fmt_has_i; has_nbo = true; break; case 'C': this_flag = _fmt_has_c; has_nbo = true; break; case 'O': this_flag = _fmt_has_o; has_nbo = true; break; default: assert false : "bad char in format"; } flags |= this_flag; assert !(has_jbo && has_nbo) : "mixed byte orders in format"; if (has_nbo) flags |= _fmt_has_nbo; int this_size = 1; if (fp < format.length() && format.charAt(fp) == fc) { // advance beyond run of the same characters this_size = 2; while (fp + 1 < format.length() && format.charAt(++fp) == fc) this_size++; switch (this_size) { case 2: flags |= _fmt_has_u2; break; case 4: flags |= _fmt_has_u4; break; default: assert false : "bad rep count in format"; } } assert has_size == 0 || // no field yet this_size == has_size || // same size this_size < has_size && fp == format.length() : // last field can be short "mixed field sizes in format"; has_size = this_size; } assert flags == (char)flags : "change _format_flags"; return (char)flags; } //---------------------------------------------------------------------- // Internals only below this point // private static String[] _name; private static String[] _format; private static String[] _wide_format; private static int[] _result_type; private static byte[] _depth; private static byte[] _lengths; private static int[] _java_code; private static char[] _flags; static { _name = new String [number_of_codes]; _format = new String [number_of_codes]; _wide_format = new String [number_of_codes]; _result_type = new int [number_of_codes]; // See BasicType.java _depth = new byte [number_of_codes]; _lengths = new byte [number_of_codes]; _java_code = new int [number_of_codes]; _flags = new char[256 * 2]; // all second page for wide formats // In case we want to fetch this information from the VM in the // future VM.registerVMInitializedObserver(new Observer() { public void update(Observable o, Object data) { initialize(); } }); } private static final int jintSize = 4; // private static String[] _name = new String [number_of_codes]; // private static String[] _format = new String [number_of_codes]; // private static String[] _wide_format = new String [number_of_codes]; // private static int[] _result_type = new int [number_of_codes]; // See BasicType.java // private static byte[] _depth = new byte [number_of_codes]; // private static byte[] _length = new byte [number_of_codes]; // private static boolean[] _can_trap = new boolean[number_of_codes]; // private static int[] _java_code = new int [number_of_codes]; // private static boolean[] _can_rewrite = new boolean[number_of_codes]; // Initialization private static void initialize() { if (Assert.ASSERTS_ENABLED) { Assert.that(number_of_codes <= 256, "too many bytecodes"); } // Format strings interpretation: // // b: bytecode // c: signed constant, Java byte-ordering // i: unsigned index , Java byte-ordering // j: unsigned index , native byte-ordering // o: branch offset , Java byte-ordering // _: unused/ignored // w: wide bytecode // // Note: Right now the format strings are used for 2 purposes: // 1. to specify the length of the bytecode // (= number of characters in format string) // 2. to specify the bytecode attributes // // The bytecode attributes are currently used only for bytecode tracing // (see BytecodeTracer); thus if more specific format information is // used, one would also have to adjust the bytecode tracer. // // Note: For bytecodes with variable length, the format string is the empty string. // Note 1: null for the format string means the bytecode doesn't exist // in that form. // // Note 2: The result type is T_ILLEGAL for bytecodes where the top of stack // type after execution is not only determined by the bytecode itself. // Java bytecodes // bytecode bytecode name format wide f. result tp stk traps def(_nop , "nop" , "b" , null , BasicType.getTVoid() , 0, false); def(_aconst_null , "aconst_null" , "b" , null , BasicType.getTObject() , 1, false); def(_iconst_m1 , "iconst_m1" , "b" , null , BasicType.getTInt() , 1, false); def(_iconst_0 , "iconst_0" , "b" , null , BasicType.getTInt() , 1, false); def(_iconst_1 , "iconst_1" , "b" , null , BasicType.getTInt() , 1, false); def(_iconst_2 , "iconst_2" , "b" , null , BasicType.getTInt() , 1, false); def(_iconst_3 , "iconst_3" , "b" , null , BasicType.getTInt() , 1, false); def(_iconst_4 , "iconst_4" , "b" , null , BasicType.getTInt() , 1, false); def(_iconst_5 , "iconst_5" , "b" , null , BasicType.getTInt() , 1, false); def(_lconst_0 , "lconst_0" , "b" , null , BasicType.getTLong() , 2, false); def(_lconst_1 , "lconst_1" , "b" , null , BasicType.getTLong() , 2, false); def(_fconst_0 , "fconst_0" , "b" , null , BasicType.getTFloat() , 1, false); def(_fconst_1 , "fconst_1" , "b" , null , BasicType.getTFloat() , 1, false); def(_fconst_2 , "fconst_2" , "b" , null , BasicType.getTFloat() , 1, false); def(_dconst_0 , "dconst_0" , "b" , null , BasicType.getTDouble() , 2, false); def(_dconst_1 , "dconst_1" , "b" , null , BasicType.getTDouble() , 2, false); def(_bipush , "bipush" , "bc" , null , BasicType.getTInt() , 1, false); def(_sipush , "sipush" , "bcc" , null , BasicType.getTInt() , 1, false); def(_ldc , "ldc" , "bk" , null , BasicType.getTIllegal(), 1, true ); def(_ldc_w , "ldc_w" , "bkk" , null , BasicType.getTIllegal(), 1, true ); def(_ldc2_w , "ldc2_w" , "bkk" , null , BasicType.getTIllegal(), 2, true ); def(_iload , "iload" , "bi" , "wbii" , BasicType.getTInt() , 1, false); def(_lload , "lload" , "bi" , "wbii" , BasicType.getTLong() , 2, false); def(_fload , "fload" , "bi" , "wbii" , BasicType.getTFloat() , 1, false); def(_dload , "dload" , "bi" , "wbii" , BasicType.getTDouble() , 2, false); def(_aload , "aload" , "bi" , "wbii" , BasicType.getTObject() , 1, false); def(_iload_0 , "iload_0" , "b" , null , BasicType.getTInt() , 1, false); def(_iload_1 , "iload_1" , "b" , null , BasicType.getTInt() , 1, false); def(_iload_2 , "iload_2" , "b" , null , BasicType.getTInt() , 1, false); def(_iload_3 , "iload_3" , "b" , null , BasicType.getTInt() , 1, false); def(_lload_0 , "lload_0" , "b" , null , BasicType.getTLong() , 2, false); def(_lload_1 , "lload_1" , "b" , null , BasicType.getTLong() , 2, false); def(_lload_2 , "lload_2" , "b" , null , BasicType.getTLong() , 2, false); def(_lload_3 , "lload_3" , "b" , null , BasicType.getTLong() , 2, false); def(_fload_0 , "fload_0" , "b" , null , BasicType.getTFloat() , 1, false); def(_fload_1 , "fload_1" , "b" , null , BasicType.getTFloat() , 1, false); def(_fload_2 , "fload_2" , "b" , null , BasicType.getTFloat() , 1, false); def(_fload_3 , "fload_3" , "b" , null , BasicType.getTFloat() , 1, false); def(_dload_0 , "dload_0" , "b" , null , BasicType.getTDouble() , 2, false); def(_dload_1 , "dload_1" , "b" , null , BasicType.getTDouble() , 2, false); def(_dload_2 , "dload_2" , "b" , null , BasicType.getTDouble() , 2, false); def(_dload_3 , "dload_3" , "b" , null , BasicType.getTDouble() , 2, false); def(_aload_0 , "aload_0" , "b" , null , BasicType.getTObject() , 1, true ); // rewriting in interpreter def(_aload_1 , "aload_1" , "b" , null , BasicType.getTObject() , 1, false); def(_aload_2 , "aload_2" , "b" , null , BasicType.getTObject() , 1, false); def(_aload_3 , "aload_3" , "b" , null , BasicType.getTObject() , 1, false); def(_iaload , "iaload" , "b" , null , BasicType.getTInt() , -1, true ); def(_laload , "laload" , "b" , null , BasicType.getTLong() , 0, true ); def(_faload , "faload" , "b" , null , BasicType.getTFloat() , -1, true ); def(_daload , "daload" , "b" , null , BasicType.getTDouble() , 0, true ); def(_aaload , "aaload" , "b" , null , BasicType.getTObject() , -1, true ); def(_baload , "baload" , "b" , null , BasicType.getTInt() , -1, true ); def(_caload , "caload" , "b" , null , BasicType.getTInt() , -1, true ); def(_saload , "saload" , "b" , null , BasicType.getTInt() , -1, true ); def(_istore , "istore" , "bi" , "wbii" , BasicType.getTVoid() , -1, false); def(_lstore , "lstore" , "bi" , "wbii" , BasicType.getTVoid() , -2, false); def(_fstore , "fstore" , "bi" , "wbii" , BasicType.getTVoid() , -1, false); def(_dstore , "dstore" , "bi" , "wbii" , BasicType.getTVoid() , -2, false); def(_astore , "astore" , "bi" , "wbii" , BasicType.getTVoid() , -1, false); def(_istore_0 , "istore_0" , "b" , null , BasicType.getTVoid() , -1, false); def(_istore_1 , "istore_1" , "b" , null , BasicType.getTVoid() , -1, false); def(_istore_2 , "istore_2" , "b" , null , BasicType.getTVoid() , -1, false); def(_istore_3 , "istore_3" , "b" , null , BasicType.getTVoid() , -1, false); def(_lstore_0 , "lstore_0" , "b" , null , BasicType.getTVoid() , -2, false); def(_lstore_1 , "lstore_1" , "b" , null , BasicType.getTVoid() , -2, false); def(_lstore_2 , "lstore_2" , "b" , null , BasicType.getTVoid() , -2, false); def(_lstore_3 , "lstore_3" , "b" , null , BasicType.getTVoid() , -2, false); def(_fstore_0 , "fstore_0" , "b" , null , BasicType.getTVoid() , -1, false); def(_fstore_1 , "fstore_1" , "b" , null , BasicType.getTVoid() , -1, false); def(_fstore_2 , "fstore_2" , "b" , null , BasicType.getTVoid() , -1, false); def(_fstore_3 , "fstore_3" , "b" , null , BasicType.getTVoid() , -1, false); def(_dstore_0 , "dstore_0" , "b" , null , BasicType.getTVoid() , -2, false); def(_dstore_1 , "dstore_1" , "b" , null , BasicType.getTVoid() , -2, false); def(_dstore_2 , "dstore_2" , "b" , null , BasicType.getTVoid() , -2, false); def(_dstore_3 , "dstore_3" , "b" , null , BasicType.getTVoid() , -2, false); def(_astore_0 , "astore_0" , "b" , null , BasicType.getTVoid() , -1, false); def(_astore_1 , "astore_1" , "b" , null , BasicType.getTVoid() , -1, false); def(_astore_2 , "astore_2" , "b" , null , BasicType.getTVoid() , -1, false); def(_astore_3 , "astore_3" , "b" , null , BasicType.getTVoid() , -1, false); def(_iastore , "iastore" , "b" , null , BasicType.getTVoid() , -3, true ); def(_lastore , "lastore" , "b" , null , BasicType.getTVoid() , -4, true ); def(_fastore , "fastore" , "b" , null , BasicType.getTVoid() , -3, true ); def(_dastore , "dastore" , "b" , null , BasicType.getTVoid() , -4, true ); def(_aastore , "aastore" , "b" , null , BasicType.getTVoid() , -3, true ); def(_bastore , "bastore" , "b" , null , BasicType.getTVoid() , -3, true ); def(_castore , "castore" , "b" , null , BasicType.getTVoid() , -3, true ); def(_sastore , "sastore" , "b" , null , BasicType.getTVoid() , -3, true ); def(_pop , "pop" , "b" , null , BasicType.getTVoid() , -1, false); def(_pop2 , "pop2" , "b" , null , BasicType.getTVoid() , -2, false); def(_dup , "dup" , "b" , null , BasicType.getTVoid() , 1, false); def(_dup_x1 , "dup_x1" , "b" , null , BasicType.getTVoid() , 1, false); def(_dup_x2 , "dup_x2" , "b" , null , BasicType.getTVoid() , 1, false); def(_dup2 , "dup2" , "b" , null , BasicType.getTVoid() , 2, false); def(_dup2_x1 , "dup2_x1" , "b" , null , BasicType.getTVoid() , 2, false); def(_dup2_x2 , "dup2_x2" , "b" , null , BasicType.getTVoid() , 2, false); def(_swap , "swap" , "b" , null , BasicType.getTVoid() , 0, false); def(_iadd , "iadd" , "b" , null , BasicType.getTInt() , -1, false); def(_ladd , "ladd" , "b" , null , BasicType.getTLong() , -2, false); def(_fadd , "fadd" , "b" , null , BasicType.getTFloat() , -1, false); def(_dadd , "dadd" , "b" , null , BasicType.getTDouble() , -2, false); def(_isub , "isub" , "b" , null , BasicType.getTInt() , -1, false); def(_lsub , "lsub" , "b" , null , BasicType.getTLong() , -2, false); def(_fsub , "fsub" , "b" , null , BasicType.getTFloat() , -1, false); def(_dsub , "dsub" , "b" , null , BasicType.getTDouble() , -2, false); def(_imul , "imul" , "b" , null , BasicType.getTInt() , -1, false); def(_lmul , "lmul" , "b" , null , BasicType.getTLong() , -2, false); def(_fmul , "fmul" , "b" , null , BasicType.getTFloat() , -1, false); def(_dmul , "dmul" , "b" , null , BasicType.getTDouble() , -2, false); def(_idiv , "idiv" , "b" , null , BasicType.getTInt() , -1, true ); def(_ldiv , "ldiv" , "b" , null , BasicType.getTLong() , -2, true ); def(_fdiv , "fdiv" , "b" , null , BasicType.getTFloat() , -1, false); def(_ddiv , "ddiv" , "b" , null , BasicType.getTDouble() , -2, false); def(_irem , "irem" , "b" , null , BasicType.getTInt() , -1, true ); def(_lrem , "lrem" , "b" , null , BasicType.getTLong() , -2, true ); def(_frem , "frem" , "b" , null , BasicType.getTFloat() , -1, false); def(_drem , "drem" , "b" , null , BasicType.getTDouble() , -2, false); def(_ineg , "ineg" , "b" , null , BasicType.getTInt() , 0, false); def(_lneg , "lneg" , "b" , null , BasicType.getTLong() , 0, false); def(_fneg , "fneg" , "b" , null , BasicType.getTFloat() , 0, false); def(_dneg , "dneg" , "b" , null , BasicType.getTDouble() , 0, false); def(_ishl , "ishl" , "b" , null , BasicType.getTInt() , -1, false); def(_lshl , "lshl" , "b" , null , BasicType.getTLong() , -1, false); def(_ishr , "ishr" , "b" , null , BasicType.getTInt() , -1, false); def(_lshr , "lshr" , "b" , null , BasicType.getTLong() , -1, false); def(_iushr , "iushr" , "b" , null , BasicType.getTInt() , -1, false); def(_lushr , "lushr" , "b" , null , BasicType.getTLong() , -1, false); def(_iand , "iand" , "b" , null , BasicType.getTInt() , -1, false); def(_land , "land" , "b" , null , BasicType.getTLong() , -2, false); def(_ior , "ior" , "b" , null , BasicType.getTInt() , -1, false); def(_lor , "lor" , "b" , null , BasicType.getTLong() , -2, false); def(_ixor , "ixor" , "b" , null , BasicType.getTInt() , -1, false); def(_lxor , "lxor" , "b" , null , BasicType.getTLong() , -2, false); def(_iinc , "iinc" , "bic" , "wbiicc", BasicType.getTVoid() , 0, false); def(_i2l , "i2l" , "b" , null , BasicType.getTLong() , 1, false); def(_i2f , "i2f" , "b" , null , BasicType.getTFloat() , 0, false); def(_i2d , "i2d" , "b" , null , BasicType.getTDouble() , 1, false); def(_l2i , "l2i" , "b" , null , BasicType.getTInt() , -1, false); def(_l2f , "l2f" , "b" , null , BasicType.getTFloat() , -1, false); def(_l2d , "l2d" , "b" , null , BasicType.getTDouble() , 0, false); def(_f2i , "f2i" , "b" , null , BasicType.getTInt() , 0, false); def(_f2l , "f2l" , "b" , null , BasicType.getTLong() , 1, false); def(_f2d , "f2d" , "b" , null , BasicType.getTDouble() , 1, false); def(_d2i , "d2i" , "b" , null , BasicType.getTInt() , -1, false); def(_d2l , "d2l" , "b" , null , BasicType.getTLong() , 0, false); def(_d2f , "d2f" , "b" , null , BasicType.getTFloat() , -1, false); def(_i2b , "i2b" , "b" , null , BasicType.getTByte() , 0, false); def(_i2c , "i2c" , "b" , null , BasicType.getTChar() , 0, false); def(_i2s , "i2s" , "b" , null , BasicType.getTShort() , 0, false); def(_lcmp , "lcmp" , "b" , null , BasicType.getTVoid() , -3, false); def(_fcmpl , "fcmpl" , "b" , null , BasicType.getTVoid() , -1, false); def(_fcmpg , "fcmpg" , "b" , null , BasicType.getTVoid() , -1, false); def(_dcmpl , "dcmpl" , "b" , null , BasicType.getTVoid() , -3, false); def(_dcmpg , "dcmpg" , "b" , null , BasicType.getTVoid() , -3, false); def(_ifeq , "ifeq" , "boo" , null , BasicType.getTVoid() , -1, false); def(_ifne , "ifne" , "boo" , null , BasicType.getTVoid() , -1, false); def(_iflt , "iflt" , "boo" , null , BasicType.getTVoid() , -1, false); def(_ifge , "ifge" , "boo" , null , BasicType.getTVoid() , -1, false); def(_ifgt , "ifgt" , "boo" , null , BasicType.getTVoid() , -1, false); def(_ifle , "ifle" , "boo" , null , BasicType.getTVoid() , -1, false); def(_if_icmpeq , "if_icmpeq" , "boo" , null , BasicType.getTVoid() , -2, false); def(_if_icmpne , "if_icmpne" , "boo" , null , BasicType.getTVoid() , -2, false); def(_if_icmplt , "if_icmplt" , "boo" , null , BasicType.getTVoid() , -2, false); def(_if_icmpge , "if_icmpge" , "boo" , null , BasicType.getTVoid() , -2, false); def(_if_icmpgt , "if_icmpgt" , "boo" , null , BasicType.getTVoid() , -2, false); def(_if_icmple , "if_icmple" , "boo" , null , BasicType.getTVoid() , -2, false); def(_if_acmpeq , "if_acmpeq" , "boo" , null , BasicType.getTVoid() , -2, false); def(_if_acmpne , "if_acmpne" , "boo" , null , BasicType.getTVoid() , -2, false); def(_goto , "goto" , "boo" , null , BasicType.getTVoid() , 0, false); def(_jsr , "jsr" , "boo" , null , BasicType.getTInt() , 0, false); def(_ret , "ret" , "bi" , "wbii" , BasicType.getTVoid() , 0, false); def(_tableswitch , "tableswitch" , "" , null , BasicType.getTVoid() , -1, false); // may have backward branches def(_lookupswitch , "lookupswitch" , "" , null , BasicType.getTVoid() , -1, false); // rewriting in interpreter def(_ireturn , "ireturn" , "b" , null , BasicType.getTInt() , -1, true ); def(_lreturn , "lreturn" , "b" , null , BasicType.getTLong() , -2, true ); def(_freturn , "freturn" , "b" , null , BasicType.getTFloat() , -1, true ); def(_dreturn , "dreturn" , "b" , null , BasicType.getTDouble() , -2, true ); def(_areturn , "areturn" , "b" , null , BasicType.getTObject() , -1, true ); def(_return , "return" , "b" , null , BasicType.getTVoid() , 0, true ); def(_getstatic , "getstatic" , "bJJ" , null , BasicType.getTIllegal(), 1, true ); def(_putstatic , "putstatic" , "bJJ" , null , BasicType.getTIllegal(), -1, true ); def(_getfield , "getfield" , "bJJ" , null , BasicType.getTIllegal(), 0, true ); def(_putfield , "putfield" , "bJJ" , null , BasicType.getTIllegal(), -2, true ); def(_invokevirtual , "invokevirtual" , "bJJ" , null , BasicType.getTIllegal(), -1, true ); def(_invokespecial , "invokespecial" , "bJJ" , null , BasicType.getTIllegal(), -1, true ); def(_invokestatic , "invokestatic" , "bJJ" , null , BasicType.getTIllegal(), 0, true ); def(_invokeinterface , "invokeinterface" , "bJJ__", null , BasicType.getTIllegal(), -1, true ); def(_invokedynamic , "invokedynamic" , "bJJJJ", null , BasicType.getTIllegal(), 0, true ); def(_new , "new" , "bkk" , null , BasicType.getTObject() , 1, true ); def(_newarray , "newarray" , "bc" , null , BasicType.getTObject() , 0, true ); def(_anewarray , "anewarray" , "bkk" , null , BasicType.getTObject() , 0, true ); def(_arraylength , "arraylength" , "b" , null , BasicType.getTVoid() , 0, true ); def(_athrow , "athrow" , "b" , null , BasicType.getTVoid() , -1, true ); def(_checkcast , "checkcast" , "bkk" , null , BasicType.getTObject() , 0, true ); def(_instanceof , "instanceof" , "bkk" , null , BasicType.getTInt() , 0, true ); def(_monitorenter , "monitorenter" , "b" , null , BasicType.getTVoid() , -1, true ); def(_monitorexit , "monitorexit" , "b" , null , BasicType.getTVoid() , -1, true ); def(_wide , "wide" , "" , null , BasicType.getTVoid() , 0, false); def(_multianewarray , "multianewarray" , "bkkc" , null , BasicType.getTObject() , 1, true ); def(_ifnull , "ifnull" , "boo" , null , BasicType.getTVoid() , -1, false); def(_ifnonnull , "ifnonnull" , "boo" , null , BasicType.getTVoid() , -1, false); def(_goto_w , "goto_w" , "boooo", null , BasicType.getTVoid() , 0, false); def(_jsr_w , "jsr_w" , "boooo", null , BasicType.getTInt() , 0, false); def(_breakpoint , "breakpoint" , "" , null , BasicType.getTVoid() , 0, true ); // JVM bytecodes // bytecode bytecode name format wide f. result tp stk traps std code def(_fast_agetfield , "fast_agetfield" , "bJJ" , null , BasicType.getTObject() , 0, true , _getfield ); def(_fast_bgetfield , "fast_bgetfield" , "bJJ" , null , BasicType.getTInt() , 0, true , _getfield ); def(_fast_cgetfield , "fast_cgetfield" , "bJJ" , null , BasicType.getTChar() , 0, true , _getfield ); def(_fast_dgetfield , "fast_dgetfield" , "bJJ" , null , BasicType.getTDouble() , 0, true , _getfield ); def(_fast_fgetfield , "fast_fgetfield" , "bJJ" , null , BasicType.getTFloat() , 0, true , _getfield ); def(_fast_igetfield , "fast_igetfield" , "bJJ" , null , BasicType.getTInt() , 0, true , _getfield ); def(_fast_lgetfield , "fast_lgetfield" , "bJJ" , null , BasicType.getTLong() , 0, true , _getfield ); def(_fast_sgetfield , "fast_sgetfield" , "bJJ" , null , BasicType.getTShort() , 0, true , _getfield ); def(_fast_aputfield , "fast_aputfield" , "bJJ" , null , BasicType.getTObject() , 0, true , _putfield ); def(_fast_bputfield , "fast_bputfield" , "bJJ" , null , BasicType.getTInt() , 0, true , _putfield ); def(_fast_zputfield , "fast_zputfield" , "bJJ" , null , BasicType.getTInt() , 0, true , _putfield ); def(_fast_cputfield , "fast_cputfield" , "bJJ" , null , BasicType.getTChar() , 0, true , _putfield ); def(_fast_dputfield , "fast_dputfield" , "bJJ" , null , BasicType.getTDouble() , 0, true , _putfield ); def(_fast_fputfield , "fast_fputfield" , "bJJ" , null , BasicType.getTFloat() , 0, true , _putfield ); def(_fast_iputfield , "fast_iputfield" , "bJJ" , null , BasicType.getTInt() , 0, true , _putfield ); def(_fast_lputfield , "fast_lputfield" , "bJJ" , null , BasicType.getTLong() , 0, true , _putfield ); def(_fast_sputfield , "fast_sputfield" , "bJJ" , null , BasicType.getTShort() , 0, true , _putfield ); def(_fast_aload_0 , "fast_aload_0" , "b" , null , BasicType.getTObject() , 1, true , _aload_0 ); def(_fast_iaccess_0 , "fast_iaccess_0" , "b_JJ" , null , BasicType.getTInt() , 1, true , _aload_0 ); def(_fast_aaccess_0 , "fast_aaccess_0" , "b_JJ" , null , BasicType.getTObject() , 1, true , _aload_0 ); def(_fast_faccess_0 , "fast_faccess_0" , "b_JJ" , null , BasicType.getTObject() , 1, true , _aload_0 ); def(_fast_iload , "fast_iload" , "bi" , null , BasicType.getTInt() , 1, false, _iload ); def(_fast_iload2 , "fast_iload2" , "bi_i" , null , BasicType.getTInt() , 2, false, _iload ); def(_fast_icaload , "fast_icaload" , "bi_" , null , BasicType.getTInt() , 0, false, _iload ); // Faster method invocation. def(_fast_invokevfinal , "fast_invokevfinal" , "bJJ" , null , BasicType.getTIllegal(), -1, true, _invokevirtual ); def(_fast_linearswitch , "fast_linearswitch" , "" , null , BasicType.getTVoid() , -1, false, _lookupswitch ); def(_fast_binaryswitch , "fast_binaryswitch" , "" , null , BasicType.getTVoid() , -1, false, _lookupswitch ); def(_fast_aldc , "fast_aldc" , "bj" , null , BasicType.getTObject(), 1, true, _ldc ); def(_fast_aldc_w , "fast_aldc_w" , "bJJ" , null , BasicType.getTObject(), 1, true, _ldc_w ); def(_return_register_finalizer, "return_register_finalizer", "b" , null , BasicType.getTVoid() , 0, true, _return ); // special handling of signature-polymorphic methods def(_invokehandle , "invokehandle" , "bJJ" , null , BasicType.getTIllegal(), -1, true, _invokevirtual ); def(_shouldnotreachhere , "_shouldnotreachhere" , "b" , null , BasicType.getTVoid() , 0, false); if (Assert.ASSERTS_ENABLED) { // compare can_trap information for each bytecode with the // can_trap information for the corresponding base bytecode // (if a rewritten bytecode can trap, so must the base bytecode) for (int i = 0; i < number_of_codes; i++) { if (isDefined(i)) { int j = javaCode(i); if (canTrap(i) && !canTrap(j)) { Assert.that(false, name(i) + " can trap => " + name(j) + " can trap, too"); } } } } } private static void def(int code, String name, String format, String wide_format, int result_type, int depth, boolean can_trap) { def(code, name, format, wide_format, result_type, depth, can_trap, code); } private static void def(int code, String name, String format, String wide_format, int result_type, int depth, boolean can_trap, int java_code) { if (Assert.ASSERTS_ENABLED) { Assert.that(wide_format == null || format != null, "short form must exist if there's a wide form"); } int len = (format != null ? format.length() : 0); int wlen = (wide_format != null ? wide_format.length() : 0); _name [code] = name; _result_type [code] = result_type; _depth [code] = (byte) depth; _lengths [code] = (byte)((wlen << 4) | (len & 0xF)); _java_code [code] = java_code; _format [code] = format; _wide_format [code] = wide_format; int bc_flags = 0; if (can_trap) bc_flags |= _bc_can_trap; if (java_code != code) bc_flags |= _bc_can_rewrite; _flags[code+0*256] = compute_flags(format, bc_flags); _flags[code+1*256] = compute_flags(wide_format, bc_flags); } }