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com.strobel.reflection.emit.OpCode Maven / Gradle / Ivy
/*
* OpCode.java
*
* Copyright (c) 2012 Mike Strobel
*
* This source code is subject to terms and conditions of the Apache License, Version 2.0.
* A copy of the license can be found in the License.html file at the root of this distribution.
* By using this source code in any fashion, you are agreeing to be bound by the terms of the
* Apache License, Version 2.0.
*
* You must not remove this notice, or any other, from this software.
*/
package com.strobel.reflection.emit;
import static com.strobel.reflection.emit.OperandType.*;
/**
* @author strobelm
*/
public enum OpCode {
NOP(0x0),
ACONST_NULL(0x1),
ICONST_M1(0x2),
ICONST_0(0x3),
ICONST_1(0x4),
ICONST_2(0x5),
ICONST_3(0x6),
ICONST_4(0x7),
ICONST_5(0x8),
LCONST_0(0x9),
LCONST_1(0xa),
FCONST_0(0xb),
FCONST_1(0xc),
FCONST_2(0xd),
DCONST_0(0xe),
DCONST_1(0xf),
BIPUSH(0x10, Byte),
SIPUSH(0x11, Short),
LDC(0x12, CPRef),
LDC_W(0x13, CPRefWide),
LDC2_W(0x14, CPRefWide),
ILOAD(0x15, Local),
LLOAD(0x16, Local),
FLOAD(0x17, Local),
DLOAD(0x18, Local),
ALOAD(0x19, Local),
ILOAD_0(0x1a),
ILOAD_1(0x1b),
ILOAD_2(0x1c),
ILOAD_3(0x1d),
LLOAD_0(0x1e),
LLOAD_1(0x1f),
LLOAD_2(0x20),
LLOAD_3(0x21),
FLOAD_0(0x22),
FLOAD_1(0x23),
FLOAD_2(0x24),
FLOAD_3(0x25),
DLOAD_0(0x26),
DLOAD_1(0x27),
DLOAD_2(0x28),
DLOAD_3(0x29),
ALOAD_0(0x2a),
ALOAD_1(0x2b),
ALOAD_2(0x2c),
ALOAD_3(0x2d),
IALOAD(0x2e),
LALOAD(0x2f),
FALOAD(0x30),
DALOAD(0x31),
AALOAD(0x32),
BALOAD(0x33),
CALOAD(0x34),
SALOAD(0x35),
ISTORE(0x36, Local),
LSTORE(0x37, Local),
FSTORE(0x38, Local),
DSTORE(0x39, Local),
ASTORE(0x3a, Local),
ISTORE_0(0x3b),
ISTORE_1(0x3c),
ISTORE_2(0x3d),
ISTORE_3(0x3e),
LSTORE_0(0x3f),
LSTORE_1(0x40),
LSTORE_2(0x41),
LSTORE_3(0x42),
FSTORE_0(0x43),
FSTORE_1(0x44),
FSTORE_2(0x45),
FSTORE_3(0x46),
DSTORE_0(0x47),
DSTORE_1(0x48),
DSTORE_2(0x49),
DSTORE_3(0x4a),
ASTORE_0(0x4b),
ASTORE_1(0x4c),
ASTORE_2(0x4d),
ASTORE_3(0x4e),
IASTORE(0x4f),
LASTORE(0x50),
FASTORE(0x51),
DASTORE(0x52),
AASTORE(0x53),
BASTORE(0x54),
CASTORE(0x55),
SASTORE(0x56),
POP(0x57),
POP2(0x58),
DUP(0x59),
DUP_X1(0x5a),
DUP_X2(0x5b),
DUP2(0x5c),
DUP2_X1(0x5d),
DUP2_X2(0x5e),
SWAP(0x5f),
IADD(0x60),
LADD(0x61),
FADD(0x62),
DADD(0x63),
ISUB(0x64),
LSUB(0x65),
FSUB(0x66),
DSUB(0x67),
IMUL(0x68),
LMUL(0x69),
FMUL(0x6a),
DMUL(0x6b),
IDIV(0x6c),
LDIV(0x6d),
FDIV(0x6e),
DDIV(0x6f),
IREM(0x70),
LREM(0x71),
FREM(0x72),
DREM(0x73),
INEG(0x74),
LNEG(0x75),
FNEG(0x76),
DNEG(0x77),
ISHL(0x78),
LSHL(0x79),
ISHR(0x7a),
LSHR(0x7b),
IUSHR(0x7c),
LUSHR(0x7d),
IAND(0x7e),
LAND(0x7f),
IOR(0x80),
LOR(0x81),
IXOR(0x82),
LXOR(0x83),
IINC(0x84, LocalByte),
I2L(0x85),
I2F(0x86),
I2D(0x87),
L2I(0x88),
L2F(0x89),
L2D(0x8a),
F2I(0x8b),
F2L(0x8c),
F2D(0x8d),
D2I(0x8e),
D2L(0x8f),
D2F(0x90),
I2B(0x91),
I2C(0x92),
I2S(0x93),
LCMP(0x94),
FCMPL(0x95),
FCMPG(0x96),
DCMPL(0x97),
DCMPG(0x98),
IFEQ(0x99, Branch),
IFNE(0x9a, Branch),
IFLT(0x9b, Branch),
IFGE(0x9c, Branch),
IFGT(0x9d, Branch),
IFLE(0x9e, Branch),
IF_ICMPEQ(0x9f, Branch),
IF_ICMPNE(0xa0, Branch),
IF_ICMPLT(0xa1, Branch),
IF_ICMPGE(0xa2, Branch),
IF_ICMPGT(0xa3, Branch),
IF_ICMPLE(0xa4, Branch),
IF_ACMPEQ(0xa5, Branch),
IF_ACMPNE(0xa6, Branch),
GOTO(0xa7, Branch),
JSR(0xa8, Branch),
RET(0xa9, Local),
TABLESWITCH(0xaa, Dynamic),
LOOKUPSWITCH(0xab, Dynamic),
IRETURN(0xac),
LRETURN(0xad),
FRETURN(0xae),
DRETURN(0xaf),
ARETURN(0xb0),
RETURN(0xb1),
GETSTATIC(0xb2, CPRefWide),
PUTSTATIC(0xb3, CPRefWide),
GETFIELD(0xb4, CPRefWide),
PUTFIELD(0xb5, CPRefWide),
INVOKEVIRTUAL(0xb6, CPRefWide),
INVOKESPECIAL(0xb7, CPRefWide),
INVOKESTATIC(0xb8, CPRefWide),
INVOKEINTERFACE(0xb9, CPRefWideUByteZero),
INVOKEDYNAMIC(0xba, CPRefWideUByteZero),
NEW(0xbb, CPRefWide),
NEWARRAY(0xbc, Type),
ANEWARRAY(0xbd, CPRefWide),
ARRAYLENGTH(0xbe),
ATHROW(0xbf),
CHECKCAST(0xc0, CPRefWide),
INSTANCEOF(0xc1, CPRefWide),
MONITORENTER(0xc2),
MONITOREXIT(0xc3),
// wide 0xc4
MULTIANEWARRAY(0xc5, CPRefWideUByte),
IFNULL(0xc6, Branch),
IFNONNULL(0xc7, Branch),
GOTO_W(0xc8, BranchW),
JSR_W(0xc9, BranchW),
BREAKPOINT(0xca, NoOperands),
// wide opcodes
ILOAD_W(0xc415, WideCPRefWide),
LLOAD_W(0xc416, WideCPRefWide),
FLOAD_W(0xc417, WideCPRefWide),
DLOAD_W(0xc418, WideCPRefWide),
ALOAD_W(0xc419, WideCPRefWide),
ISTORE_W(0xc436, WideCPRefWide),
LSTORE_W(0xc437, WideCPRefWide),
FSTORE_W(0xc438, WideCPRefWide),
DSTORE_W(0xc439, WideCPRefWide),
ASTORE_W(0xc43a, WideCPRefWide),
IINC_W(0xc484, WideCPRefWideShort),
RET_W(0xc4a9, WideCPRefWide);
private OpCode(final int code) {
this(code, NoOperands);
}
private OpCode(final int code, final OperandType operandType) {
this._code = code;
this._operandType = operandType;
}
public int getCode() {
return _code;
}
public boolean isWide() {
return ((_code >> 8) & WIDE) == WIDE;
}
public OperandType getOperandType() {
return _operandType;
}
public int getSize() {
return ((_code >> 8) == 0xc4) ? 2 : 1;
}
public int getSizeWithOperands() {
return _operandType.length;
}
public int getStackChange() {
return stackChange[_code & 0xFF];
}
public OpCode negate() {
if (this == IFNULL) {
return IFNONNULL;
}
else if (this == IFNONNULL) {
return IFNULL;
}
else {
return get(((_code + 1) ^ 1) - 1);
}
}
private final int _code;
private final OperandType _operandType;
/**
* Get the OpCode for a simple standard 1-byte opcode.
*/
public static OpCode get(final int code) {
return getOpcodeBlock(code >> 8)[code & 0xff];
}
private static OpCode[] getOpcodeBlock(final int prefix) {
switch (prefix) {
case STANDARD:
return _standardOpCodes;
case WIDE:
return _wideOpCodes;
default:
return null;
}
}
/**
* The byte prefix for the wide instructions.
*/
public static final int STANDARD = 0x00;
public static final int WIDE = 0xc4;
private static OpCode[] _standardOpCodes = new OpCode[256];
private static OpCode[] _wideOpCodes = new OpCode[256];
static {
for (final OpCode o : values()) {
getOpcodeBlock(o._code >> 8)[o._code & 0xff] = o;
}
}
public boolean endsUnconditionalJumpBlock() {
switch (this) {
case GOTO:
case JSR:
case RET:
return true;
case IRETURN:
case LRETURN:
case FRETURN:
case DRETURN:
case ARETURN:
case RETURN:
return true;
case ATHROW:
return true;
case GOTO_W:
case JSR_W:
return true;
case RET_W:
return true;
}
return false;
}
private static final byte[] stackChange = {
/* NOP */ 0,
/* ACONST_NULL */ 1,
/* ICONST_M1 */ 1,
/* ICONST_0 */ 1,
/* ICONST_1 */ 1,
/* ICONST_2 */ 1,
/* ICONST_3 */ 1,
/* ICONST_4 */ 1,
/* ICONST_5 */ 1,
/* LCONST_0 */ 2,
/* LCONST_1 */ 2,
/* FCONST_0 */ 1,
/* FCONST_1 */ 1,
/* FCONST_2 */ 1,
/* DCONST_0 */ 2,
/* DCONST_1 */ 2,
/* BIPUSH */ 1,
/* SIPUSH */ 1,
/* LDC */ 1,
/* LDC_W */ 1,
/* LDC2_W */ 2,
/* ILOAD */ 1,
/* LLOAD */ 2,
/* FLOAD */ 1,
/* DLOAD */ 2,
/* ALOAD */ 1,
/* ILOAD_0 */ 1,
/* ILOAD_1 */ 1,
/* ILOAD_2 */ 1,
/* ILOAD_3 */ 1,
/* LLOAD_0 */ 2,
/* LLOAD_1 */ 2,
/* LLOAD_2 */ 2,
/* LLOAD_3 */ 2,
/* FLOAD_0 */ 1,
/* FLOAD_1 */ 1,
/* FLOAD_2 */ 1,
/* FLOAD_3 */ 1,
/* DLOAD_0 */ 2,
/* DLOAD_1 */ 2,
/* DLOAD_2 */ 2,
/* DLOAD_3 */ 2,
/* ALOAD_0 */ 1,
/* ALOAD_1 */ 1,
/* ALOAD_2 */ 1,
/* ALOAD_3 */ 1,
/* IALOAD */ -1,
/* LALOAD */ 0,
/* FALOAD */ -1,
/* DALOAD */ 0,
/* AALOAD */ -1,
/* BALOAD */ -1,
/* CALOAD */ -1,
/* SALOAD */ -1,
/* ISTORE */ -1,
/* LSTORE */ -2,
/* FSTORE */ -1,
/* DSTORE */ -2,
/* ASTORE */ -1,
/* ISTORE_0 */ -1,
/* ISTORE_1 */ -1,
/* ISTORE_2 */ -1,
/* ISTORE_3 */ -1,
/* LSTORE_0 */ -2,
/* LSTORE_1 */ -2,
/* LSTORE_2 */ -2,
/* LSTORE_3 */ -2,
/* FSTORE_0 */ -1,
/* FSTORE_1 */ -1,
/* FSTORE_2 */ -1,
/* FSTORE_3 */ -1,
/* DSTORE_0 */ -2,
/* DSTORE_1 */ -2,
/* DSTORE_2 */ -2,
/* DSTORE_3 */ -2,
/* ASTORE_0 */ -1,
/* ASTORE_1 */ -1,
/* ASTORE_2 */ -1,
/* ASTORE_3 */ -1,
/* IASTORE */ -3,
/* LASTORE */ -4,
/* FASTORE */ -3,
/* DASTORE */ -4,
/* AASTORE */ -3,
/* BASTORE */ -3,
/* CASTORE */ -3,
/* SASTORE */ -3,
/* POP */ -1,
/* POP2 */ -2,
/* DUP */ 1,
/* DUP_X1 */ 1,
/* DUP_X2 */ 1,
/* DUP2 */ 2,
/* DUP2_X1 */ 2,
/* DUP2_X2 */ 2,
/* SWAP */ 0,
/* IADD */ -1,
/* LADD */ -2,
/* FADD */ -1,
/* DADD */ -2,
/* ISUB */ -1,
/* LSUB */ -2,
/* FSUB */ -1,
/* DSUB */ -2,
/* IMUL */ -1,
/* LMUL */ -2,
/* FMUL */ -1,
/* DMUL */ -2,
/* IDIV */ -1,
/* LDIV */ -2,
/* FDIV */ -1,
/* DDIV */ -2,
/* IREM */ -1,
/* LREM */ -2,
/* FREM */ -1,
/* DREM */ -2,
/* INEG */ 0,
/* LNEG */ 0,
/* FNEG */ 0,
/* DNEG */ 0,
/* ISHL */ -1,
/* LSHL */ -1,
/* ISHR */ -1,
/* LSHR */ -1,
/* IUSHR */ -1,
/* LUSHR */ -1,
/* IAND */ -1,
/* LAND */ -2,
/* IOR */ -1,
/* LOR */ -2,
/* IXOR */ -1,
/* LXOR */ -2,
/* IINC */ 0,
/* I2L */ 1,
/* I2F */ 0,
/* I2D */ 1,
/* L2I */ -1,
/* L2F */ -1,
/* L2D */ 0,
/* F2I */ 0,
/* F2L */ 1,
/* F2D */ 1,
/* D2I */ -1,
/* D2L */ 0,
/* D2F */ -1,
/* I2B */ 0,
/* I2C */ 0,
/* I2S */ 0,
/* LCMP */ -3,
/* FCMPL */ -1,
/* FCMPG */ -1,
/* DCMPL */ -3,
/* DCMPG */ -3,
/* IFEQ */ -1,
/* IFNE */ -1,
/* IFLT */ -1,
/* IFGE */ -1,
/* IFGT */ -1,
/* IFLE */ -1,
/* IF_ICMPEQ */ -2,
/* IF_ICMPNE */ -2,
/* IF_ICMPLT */ -2,
/* IF_ICMPGE */ -2,
/* IF_ICMPGT */ -2,
/* IF_ICMPLE */ -2,
/* IF_ACMPEQ */ -2,
/* IF_ACMPNE */ -2,
/* GOTO */ 0,
/* JSR */ 1,
/* RET */ 0,
/* TABLESWITCH */ -1,
/* LOOKUPSWITCH */ -1,
/* IRETURN */ -1,
/* LRETURN */ -2,
/* FRETURN */ -1,
/* DRETURN */ -2,
/* ARETURN */ -1,
/* RETURN */ 0,
/* GETSTATIC */ 0, // <-+-- pops 'this' (unless static)
/* PUTSTATIC */ 0, // | but needs to account for
/* GETFIELD */ 1, // | field type
/* PUTFIELD */ -1, // <-+
/* INVOKEVIRTUAL */ -1, // <-+-- pops 'this' (unless static)
/* INVOKESPECIAL */ -1, // | but needs to account for
/* INVOKESTATIC */ 0, // | parameter and return types
/* INVOKEINTERFACE */ -1, // <-+
/* XXXUNUSEDXXX */ 0,
/* NEW */ 1,
/* NEWARRAY */ 0,
/* ANEWARRAY */ 0,
/* ARRAYLENGTH */ 0,
/* ATHROW */ -1,
/* CHECKCAST */ 0,
/* INSTANCEOF */ 0,
/* MONITORENTER */ -1,
/* MONITOREXIT */ -1,
/* WIDE */ 0,
/* MULTIANEWARRAY */ 1,
/* IFNULL */ -1,
/* IFNONNULL */ -1,
/* GOTO_W */ 0,
/* JSR_W */ 1,
/* BREAKPOINT */ 0,
/* LDC_QUICK */ 1,
/* LDC_W_QUICK */ 1,
/* LDC2_W_QUICK */ 2,
/* GETFIELD_QUICK */ 0,
/* PUTFIELD_QUICK */ 0,
/* GETFIELD2_QUICK */ 0,
/* PUTFIELD2_QUICK */ 0,
/* GETSTATIC_QUICK */ 0,
/* PUTSTATIC_QUICK */ 0,
/* GETSTATIC2_QUICK */ 0,
/* PUTSTATIC2_QUICK */ 0,
/* INVOKEVIRTUAL_QUICK */ 0,
/* INVOKENONVIRTUAL_QUICK */ 0,
/* INVOKESUPER_QUICK */ 0,
/* INVOKESTATIC_QUICK */ 0,
/* INVOKEINTERFACE_QUICK */ 0,
/* INVOKEVIRTUALOBJECT_QUICK */ 0,
/* XXXUNUSEDXXX */ 0,
/* NEW_QUICK */ 1,
/* ANEWARRAY_QUICK */ 1,
/* MULTIANEWARRAY_QUICK */ 1,
/* CHECKCAST_QUICK */ -1,
/* INSTANCEOF_QUICK */ 0,
/* INVOKEVIRTUAL_QUICK_W */ 0,
/* GETFIELD_QUICK_W */ 0,
/* PUTFIELD_QUICK_W */ 0,
/* XXXUNUSEDXXX */ 0,
/* XXXUNUSEDXXX */ 0,
/* XXXUNUSEDXXX */ 0,
/* XXXUNUSEDXXX */ 0,
/* XXXUNUSEDXXX */ 0,
/* XXXUNUSEDXXX */ 0,
/* XXXUNUSEDXXX */ 0,
/* XXXUNUSEDXXX */ 0,
/* XXXUNUSEDXXX */ 0,
/* XXXUNUSEDXXX */ 0,
/* XXXUNUSEDXXX */ 0,
/* XXXUNUSEDXXX */ 0,
/* XXXUNUSEDXXX */ 0,
/* XXXUNUSEDXXX */ 0,
/* XXXUNUSEDXXX */ 0,
/* XXXUNUSEDXXX */ 0,
/* XXXUNUSEDXXX */ 0,
/* XXXUNUSEDXXX */ 0,
/* XXXUNUSEDXXX */ 0,
/* XXXUNUSEDXXX */ 0,
/* XXXUNUSEDXXX */ 0,
/* XXXUNUSEDXXX */ 0,
/* XXXUNUSEDXXX */ 0,
/* XXXUNUSEDXXX */ 0,
/* XXXUNUSEDXXX */ 0,
/* IMPDEP1 */ 0,
/* IMPDEP2 */ 0
};
}
