javaopcode.java

JPC: x86 PC Hardware Emulator. 牛津大学开发的一个纯JAVA的x86系统结构硬件模拟器。

/*
    JPC: A x86 PC Hardware Emulator for a pure Java Virtual Machine
    Release Version 2.0

    A project from the Physics Dept, The University of Oxford

    Copyright (C) 2007 Isis Innovation Limited

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License version 2 as published by
    the Free Software Foundation.

    This program 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 for more details.

    You should have received a copy of the GNU General Public License along
    with this program; if not, write to the Free Software Foundation, Inc.,
    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
    Details (including contact information) can be found at: 

    www.physics.ox.ac.uk/jpc
*/

package org.jpc.classfile;

public class JavaOpcode
{
    public static final int NOP = 0;
    public static final int ACONST_NULL = 1;
    public static final int ICONST_M1 = 2;
    public static final int ICONST_0 = 3;
    public static final int ICONST_1 = 4;
    public static final int ICONST_2 = 5;
    public static final int ICONST_3 = 6;
    public static final int ICONST_4 = 7;
    public static final int ICONST_5 = 8;
    public static final int LCONST_0 = 9;
    public static final int LCONST_1 = 10;
    public static final int FCONST_0 = 11;
    public static final int FCONST_1 = 12;
    public static final int FCONST_2 = 13;
    public static final int DCONST_0 = 14;
    public static final int DCONST_1 = 15;
    public static final int BIPUSH = 16;
    public static final int SIPUSH = 17;
    public static final int LDC = 18;
    public static final int LDC_W = 19;
    public static final int LDC2_W = 20;
    public static final int ILOAD = 21;
    public static final int LLOAD = 22;
    public static final int FLOAD = 23;
    public static final int DLOAD = 24;
    public static final int ALOAD = 25;
    public static final int ILOAD_0 = 26;
    public static final int ILOAD_1 = 27;
    public static final int ILOAD_2 = 28;
    public static final int ILOAD_3 = 29;
    public static final int LLOAD_0 = 30;
    public static final int LLOAD_1 = 31;
    public static final int LLOAD_2 = 32;
    public static final int LLOAD_3 = 33;
    public static final int FLOAD_0 = 34;
    public static final int FLOAD_1 = 35;
    public static final int FLOAD_2 = 36;
    public static final int FLOAD_3 = 37;
    public static final int DLOAD_0 = 38;
    public static final int DLOAD_1 = 39;
    public static final int DLOAD_2 = 40;
    public static final int DLOAD_3 = 41;
    public static final int ALOAD_0 = 42;
    public static final int ALOAD_1 = 43;
    public static final int ALOAD_2 = 44;
    public static final int ALOAD_3 = 45;
    public static final int IALOAD = 46;
    public static final int LALOAD = 47;
    public static final int FALOAD = 48;
    public static final int DALOAD = 49;
    public static final int AALOAD = 50;
    public static final int BALOAD = 51;
    public static final int CALOAD = 52;
    public static final int SALOAD = 53;
    public static final int ISTORE = 54;
    public static final int LSTORE = 55;
    public static final int FSTORE = 56;
    public static final int DSTORE = 57;
    public static final int ASTORE = 58;
    public static final int ISTORE_0 = 59;
    public static final int ISTORE_1 = 60;
    public static final int ISTORE_2 = 61;
    public static final int ISTORE_3 = 62;
    public static final int LSTORE_0 = 63;
    public static final int LSTORE_1 = 64;
    public static final int LSTORE_2 = 65;
    public static final int LSTORE_3 = 66;
    public static final int FSTORE_0 = 67;
    public static final int FSTORE_1 = 68;
    public static final int FSTORE_2 = 69;
    public static final int FSTORE_3 = 70;
    public static final int DSTORE_0 = 71;
    public static final int DSTORE_1 = 72;
    public static final int DSTORE_2 = 73;
    public static final int DSTORE_3 = 74;
    public static final int ASTORE_0 = 75;
    public static final int ASTORE_1 = 76;
    public static final int ASTORE_2 = 77;
    public static final int ASTORE_3 = 78;
    public static final int IASTORE = 79;
    public static final int LASTORE = 80;
    public static final int FASTORE = 81;
    public static final int DASTORE = 82;
    public static final int AASTORE = 83;
    public static final int BASTORE = 84;
    public static final int CASTORE = 85;
    public static final int SASTORE = 86;
    public static final int POP = 87;
    public static final int POP2 = 88;
    public static final int DUP = 89;
    public static final int DUP_X1 = 90;
    public static final int DUP_X2 = 91;
    public static final int DUP2 = 92;
    public static final int DUP2_X1 = 93;
    public static final int DUP2_X2 = 94;
    public static final int SWAP = 95;
    public static final int IADD = 96;
    public static final int LADD = 97;
    public static final int FADD = 98;
    public static final int DADD = 99;
    public static final int ISUB = 100;
    public static final int LSUB = 101;
    public static final int FSUB = 102;
    public static final int DSUB = 103;
    public static final int IMUL = 104;
    public static final int LMUL = 105;
    public static final int FMUL = 106;
    public static final int DMUL = 107;
    public static final int IDIV = 108;
    public static final int LDIV = 109;
    public static final int FDIV = 110;
    public static final int DDIV = 111;
    public static final int IREM = 112;
    public static final int LREM = 113;
    public static final int FREM = 114;
    public static final int DREM = 115;
    public static final int INEG = 116;
    public static final int LNEG = 117;
    public static final int FNEG = 118;
    public static final int DNEG = 119;
    public static final int ISHL = 120;
    public static final int LSHL = 121;
    public static final int ISHR = 122;
    public static final int LSHR = 123;
    public static final int IUSHR = 124;
    public static final int LUSHR = 125;
    public static final int IAND = 126;
    public static final int LAND = 127;
    public static final int IOR = 128;
    public static final int LOR = 129;
    public static final int IXOR = 130;
    public static final int LXOR = 131;
    public static final int IINC = 132;
    public static final int I2L = 133;
    public static final int I2F = 134;
    public static final int I2D = 135;
    public static final int L2I = 136;
    public static final int L2F = 137;
    public static final int L2D = 138;
    public static final int F2I = 139;
    public static final int F2L = 140;
    public static final int F2D = 141;
    public static final int D2I = 142;
    public static final int D2L = 143;
    public static final int D2F = 144;
    public static final int I2B = 145;
    public static final int I2C = 146;
    public static final int I2S = 147;
    public static final int LCMP = 148;
    public static final int FCMPL = 149;
    public static final int FCMPG = 150;
    public static final int DCMPL = 151;
    public static final int DCMPG = 152;
    public static final int IFEQ = 153;
    public static final int IFNE = 154;
    public static final int IFLT = 155;
    public static final int IFGE = 156;
    public static final int IFGT = 157;
    public static final int IFLE = 158;
    public static final int IF_ICMPEQ = 159;
    public static final int IF_ICMPNE = 160;
    public static final int IF_ICMPLT = 161;
    public static final int IF_ICMPGE = 162;
    public static final int IF_ICMPGT = 163;
    public static final int IF_ICMPLE = 164;
    public static final int IF_ACMPEQ = 165;
    public static final int IF_ACMPNE = 166;
    public static final int GOTO = 167;
    public static final int JSR = 168;
    public static final int RET = 169;
    public static final int TABLESWITCH = 170;
    public static final int LOOKUPSWITCH = 171;
    public static final int IRETURN = 172;
    public static final int LRETURN = 173;
    public static final int FRETURN = 174;
    public static final int DRETURN = 175;
    public static final int ARETURN = 176;
    public static final int RETURN = 177;
    public static final int GETSTATIC = 178;
    public static final int PUTSTATIC = 179;
    public static final int GETFIELD = 180;
    public static final int PUTFIELD = 181;
    public static final int INVOKEVIRTUAL = 182;
    public static final int INVOKESPECIAL = 183;
    public static final int INVOKESTATIC = 184;
    public static final int INVOKEINTERFACE = 185;
    public static final int XXXUNUSEDXXX = 186;
    public static final int NEW = 187;
    public static final int NEWARRAY = 188;
    public static final int ANEWARRAY = 189;
    public static final int ARRAYLENGTH = 190;
    public static final int ATHROW = 191;
    public static final int CHECKCAST = 192;
    public static final int INSTANCEOF = 193;
    public static final int MONITORENTER = 194;
    public static final int MONITOREXIT = 195;
    public static final int WIDE = 196;
    public static final int MULTIANEWARRAY = 197;
    public static final int IFNULL = 198;
    public static final int IFNONNULL = 199;
    public static final int GOTO_W = 200;
    public static final int JSR_W = 201;
    public static final int BREAKPOINT = 202;
    public static final int IMPDEP1 = 254;
    public static final int IMPDEP2 = 255;

    private static final String[] opcodes = 
    {
        "NOP",
        "ACONST_NULL",
        "ICONST_M1",
        "ICONST_0",
        "ICONST_1",
        "ICONST_2",
        "ICONST_3",
        "ICONST_4",
        "ICONST_5",
        "LCONST_0",
        "LCONST_1",
        "FCONST_0",
        "FCONST_1",
        "FCONST_2",
        "DCONST_0",
        "DCONST_1",
        "BIPUSH",
        "SIPUSH",
        "LDC",
        "LDC_W",
        "LDC2_W",
        "ILOAD",
        "LLOAD",
        "FLOAD",
        "DLOAD",
        "ALOAD",
        "ILOAD_0",
        "ILOAD_1",
        "ILOAD_2",
        "ILOAD_3",
        "LLOAD_0",
        "LLOAD_1",
        "LLOAD_2",
        "LLOAD_3",
        "FLOAD_0",
        "FLOAD_1",
        "FLOAD_2",
        "FLOAD_3",
        "DLOAD_0",
        "DLOAD_1",
        "DLOAD_2",
        "DLOAD_3",
        "ALOAD_0",
        "ALOAD_1",
        "ALOAD_2",
        "ALOAD_3",
        "IALOAD",
        "LALOAD",
        "FALOAD",
        "DALOAD",
        "AALOAD",
        "BALOAD",
        "CALOAD",
        "SALOAD",
        "ISTORE",
        "LSTORE",
        "FSTORE",
        "DSTORE",
        "ASTORE",
        "ISTORE_0",
        "ISTORE_1",
        "ISTORE_2",
        "ISTORE_3",
        "LSTORE_0",
        "LSTORE_1",
        "LSTORE_2",
        "LSTORE_3",
        "FSTORE_0",
        "FSTORE_1",
        "FSTORE_2",
        "FSTORE_3",
        "DSTORE_0",
        "DSTORE_1",
        "DSTORE_2",
        "DSTORE_3",
        "ASTORE_0",
        "ASTORE_1",
        "ASTORE_2",
        "ASTORE_3",
        "IASTORE",
        "LASTORE",
        "FASTORE",
        "DASTORE",
        "AASTORE",
        "BASTORE",
        "CASTORE",
        "SASTORE",
        "POP",
        "POP2",
        "DUP",
        "DUP_X1",
        "DUP_X2",
        "DUP2",
        "DUP2_X1",
        "DUP2_X2",
        "SWAP",
        "IADD",
        "LADD",
        "FADD",
        "DADD",
        "ISUB",
        "LSUB",
        "FSUB",
        "DSUB",
        "IMUL",
        "LMUL",
        "FMUL",
        "DMUL",
        "IDIV",
        "LDIV",
        "FDIV",
        "DDIV",
        "IREM",
        "LREM",
        "FREM",
        "DREM",
        "INEG",
        "LNEG",
        "FNEG",
        "DNEG",
        "ISHL",
        "LSHL",
        "ISHR",
        "LSHR",
        "IUSHR",
        "LUSHR",
        "IAND",
        "LAND",
        "IOR",
        "LOR",
        "IXOR",
        "LXOR",
        "IINC",
        "I2L",
        "I2F",
        "I2D",
        "L2I",
        "L2F",
        "L2D",
        "F2I",
        "F2L",
        "F2D",
        "D2I",
        "D2L",
        "D2F",
        "I2B",
        "I2C",
        "I2S",
        "LCMP",
        "FCMPL",
        "FCMPG",
        "DCMPL",
        "DCMPG",
        "IFEQ",
        "IFNE",
        "IFLT",
        "IFGE",
        "IFGT",
        "IFLE",
        "IF_ICMPEQ",
        "IF_ICMPNE",
        "IF_ICMPLT",
        "IF_ICMPGE",
        "IF_ICMPGT",
        "IF_ICMPLE",
        "IF_ACMPEQ",
        "IF_ACMPNE",
        "GOTO",
        "JSR",
        "RET",
        "TABLESWITCH",
        "LOOKUPSWITCH",
        "IRETURN",
        "LRETURN",
        "FRETURN",
        "DRETURN",
        "ARETURN",
        "RETURN",
        "GETSTATIC",
        "PUTSTATIC",
        "GETFIELD",
        "PUTFIELD",
        "INVOKEVIRTUAL",
        "INVOKESPECIAL",
        "INVOKESTATIC",
        "INVOKEINTERFACE",
        "XXXUNUSEDXXX",
        "NEW",
        "NEWARRAY",
        "ANEWARRAY",
        "ARRAYLENGTH",
        "ATHROW",
        "CHECKCAST",
        "INSTANCEOF",
        "MONITORENTER",
        "MONITOREXIT",
        "WIDE",
        "MULTIANEWARRAY",
        "IFNULL",
        "IFNONNULL",
        "GOTO_W",
        "JSR_W",
        "BREAKPOINT",
        "RESERVED",
        "RESERVED",
        "RESERVED",
        "RESERVED",
        "RESERVED",
        "RESERVED",
        "RESERVED",
        "RESERVED",
        "RESERVED",
        "RESERVED",
        "RESERVED",
        "RESERVED",
        "RESERVED",
        "RESERVED",
        "RESERVED",
        "RESERVED",
        "RESERVED",
        "RESERVED",
        "RESERVED",
        "RESERVED",
        "RESERVED",
        "RESERVED",
        "RESERVED",
        "RESERVED",
        "RESERVED",
        "RESERVED",
        "RESERVED",
        "RESERVED",
        "RESERVED",
        "RESERVED",
        "RESERVED",
        "RESERVED",
        "RESERVED",
        "RESERVED",
        "RESERVED",
        "RESERVED",
        "RESERVED",
        "RESERVED",
        "RESERVED",
        "RESERVED",
        "RESERVED",
        "RESERVED",
        "RESERVED",
        "RESERVED",
        "RESERVED",
        "RESERVED",
        "RESERVED",
        "RESERVED",
        "RESERVED",
        "RESERVED",
        "RESERVED",
        "IMPDEP1",
        "IMPDEP2"
    };



    public static final int CALC_FROM_CONST_POOL = 0xBEEF;

    public static String toString(int value)
    {
        return opcodes[value];
    }

    public static boolean isBranchInstruction(int code)
    {
        switch (code) {
        case IFEQ:
        case IFNE:
        case IFLT:
        case IFGE:
        case IFGT:
        case IFLE:
        case IF_ICMPEQ:
        case IF_ICMPNE:
        case IF_ICMPLT:
        case IF_ICMPGE:
        case IF_ICMPGT:
        case IF_ICMPLE:
        case IF_ACMPEQ:
        case IF_ACMPNE:
        case IFNULL:
        case IFNONNULL:
            return true;

        default:
            return false;
//         case GOTO:
//         case JSR:
//         case RET:
//         case GOTO_W:
//         case JSR_W:
        }
    }

    public static boolean isReturn(int code)
    {
	switch (code) {
	case IRETURN:
	case LRETURN: