| /* |
| * reserved comment block |
| * DO NOT REMOVE OR ALTER! |
| */ |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.sun.org.apache.bcel.internal.generic; |
| |
| import com.sun.org.apache.bcel.internal.Const; |
| |
| /** |
| * This interface contains shareable instruction objects. |
| * |
| * In order to save memory you can use some instructions multiply, |
| * since they have an immutable state and are directly derived from |
| * Instruction. I.e. they have no instance fields that could be |
| * changed. Since some of these instructions like ICONST_0 occur |
| * very frequently this can save a lot of time and space. This |
| * feature is an adaptation of the FlyWeight design pattern, we |
| * just use an array instead of a factory. |
| * |
| * The Instructions can also accessed directly under their names, so |
| * it's possible to write il.append(Instruction.ICONST_0); |
| * |
| */ |
| public final class InstructionConst { |
| |
| /** |
| * Predefined instruction objects |
| */ |
| /* |
| * NOTE these are not currently immutable, because Instruction |
| * has mutable protected fields opcode and length. |
| */ |
| public static final Instruction NOP = new NOP(); |
| public static final Instruction ACONST_NULL = new ACONST_NULL(); |
| public static final Instruction ICONST_M1 = new ICONST(-1); |
| public static final Instruction ICONST_0 = new ICONST(0); |
| public static final Instruction ICONST_1 = new ICONST(1); |
| public static final Instruction ICONST_2 = new ICONST(2); |
| public static final Instruction ICONST_3 = new ICONST(3); |
| public static final Instruction ICONST_4 = new ICONST(4); |
| public static final Instruction ICONST_5 = new ICONST(5); |
| public static final Instruction LCONST_0 = new LCONST(0); |
| public static final Instruction LCONST_1 = new LCONST(1); |
| public static final Instruction FCONST_0 = new FCONST(0); |
| public static final Instruction FCONST_1 = new FCONST(1); |
| public static final Instruction FCONST_2 = new FCONST(2); |
| public static final Instruction DCONST_0 = new DCONST(0); |
| public static final Instruction DCONST_1 = new DCONST(1); |
| public static final ArrayInstruction IALOAD = new IALOAD(); |
| public static final ArrayInstruction LALOAD = new LALOAD(); |
| public static final ArrayInstruction FALOAD = new FALOAD(); |
| public static final ArrayInstruction DALOAD = new DALOAD(); |
| public static final ArrayInstruction AALOAD = new AALOAD(); |
| public static final ArrayInstruction BALOAD = new BALOAD(); |
| public static final ArrayInstruction CALOAD = new CALOAD(); |
| public static final ArrayInstruction SALOAD = new SALOAD(); |
| public static final ArrayInstruction IASTORE = new IASTORE(); |
| public static final ArrayInstruction LASTORE = new LASTORE(); |
| public static final ArrayInstruction FASTORE = new FASTORE(); |
| public static final ArrayInstruction DASTORE = new DASTORE(); |
| public static final ArrayInstruction AASTORE = new AASTORE(); |
| public static final ArrayInstruction BASTORE = new BASTORE(); |
| public static final ArrayInstruction CASTORE = new CASTORE(); |
| public static final ArrayInstruction SASTORE = new SASTORE(); |
| public static final StackInstruction POP = new POP(); |
| public static final StackInstruction POP2 = new POP2(); |
| public static final StackInstruction DUP = new DUP(); |
| public static final StackInstruction DUP_X1 = new DUP_X1(); |
| public static final StackInstruction DUP_X2 = new DUP_X2(); |
| public static final StackInstruction DUP2 = new DUP2(); |
| public static final StackInstruction DUP2_X1 = new DUP2_X1(); |
| public static final StackInstruction DUP2_X2 = new DUP2_X2(); |
| public static final StackInstruction SWAP = new SWAP(); |
| public static final ArithmeticInstruction IADD = new IADD(); |
| public static final ArithmeticInstruction LADD = new LADD(); |
| public static final ArithmeticInstruction FADD = new FADD(); |
| public static final ArithmeticInstruction DADD = new DADD(); |
| public static final ArithmeticInstruction ISUB = new ISUB(); |
| public static final ArithmeticInstruction LSUB = new LSUB(); |
| public static final ArithmeticInstruction FSUB = new FSUB(); |
| public static final ArithmeticInstruction DSUB = new DSUB(); |
| public static final ArithmeticInstruction IMUL = new IMUL(); |
| public static final ArithmeticInstruction LMUL = new LMUL(); |
| public static final ArithmeticInstruction FMUL = new FMUL(); |
| public static final ArithmeticInstruction DMUL = new DMUL(); |
| public static final ArithmeticInstruction IDIV = new IDIV(); |
| public static final ArithmeticInstruction LDIV = new LDIV(); |
| public static final ArithmeticInstruction FDIV = new FDIV(); |
| public static final ArithmeticInstruction DDIV = new DDIV(); |
| public static final ArithmeticInstruction IREM = new IREM(); |
| public static final ArithmeticInstruction LREM = new LREM(); |
| public static final ArithmeticInstruction FREM = new FREM(); |
| public static final ArithmeticInstruction DREM = new DREM(); |
| public static final ArithmeticInstruction INEG = new INEG(); |
| public static final ArithmeticInstruction LNEG = new LNEG(); |
| public static final ArithmeticInstruction FNEG = new FNEG(); |
| public static final ArithmeticInstruction DNEG = new DNEG(); |
| public static final ArithmeticInstruction ISHL = new ISHL(); |
| public static final ArithmeticInstruction LSHL = new LSHL(); |
| public static final ArithmeticInstruction ISHR = new ISHR(); |
| public static final ArithmeticInstruction LSHR = new LSHR(); |
| public static final ArithmeticInstruction IUSHR = new IUSHR(); |
| public static final ArithmeticInstruction LUSHR = new LUSHR(); |
| public static final ArithmeticInstruction IAND = new IAND(); |
| public static final ArithmeticInstruction LAND = new LAND(); |
| public static final ArithmeticInstruction IOR = new IOR(); |
| public static final ArithmeticInstruction LOR = new LOR(); |
| public static final ArithmeticInstruction IXOR = new IXOR(); |
| public static final ArithmeticInstruction LXOR = new LXOR(); |
| public static final ConversionInstruction I2L = new I2L(); |
| public static final ConversionInstruction I2F = new I2F(); |
| public static final ConversionInstruction I2D = new I2D(); |
| public static final ConversionInstruction L2I = new L2I(); |
| public static final ConversionInstruction L2F = new L2F(); |
| public static final ConversionInstruction L2D = new L2D(); |
| public static final ConversionInstruction F2I = new F2I(); |
| public static final ConversionInstruction F2L = new F2L(); |
| public static final ConversionInstruction F2D = new F2D(); |
| public static final ConversionInstruction D2I = new D2I(); |
| public static final ConversionInstruction D2L = new D2L(); |
| public static final ConversionInstruction D2F = new D2F(); |
| public static final ConversionInstruction I2B = new I2B(); |
| public static final ConversionInstruction I2C = new I2C(); |
| public static final ConversionInstruction I2S = new I2S(); |
| public static final Instruction LCMP = new LCMP(); |
| public static final Instruction FCMPL = new FCMPL(); |
| public static final Instruction FCMPG = new FCMPG(); |
| public static final Instruction DCMPL = new DCMPL(); |
| public static final Instruction DCMPG = new DCMPG(); |
| public static final ReturnInstruction IRETURN = new IRETURN(); |
| public static final ReturnInstruction LRETURN = new LRETURN(); |
| public static final ReturnInstruction FRETURN = new FRETURN(); |
| public static final ReturnInstruction DRETURN = new DRETURN(); |
| public static final ReturnInstruction ARETURN = new ARETURN(); |
| public static final ReturnInstruction RETURN = new RETURN(); |
| public static final Instruction ARRAYLENGTH = new ARRAYLENGTH(); |
| public static final Instruction ATHROW = new ATHROW(); |
| public static final Instruction MONITORENTER = new MONITORENTER(); |
| public static final Instruction MONITOREXIT = new MONITOREXIT(); |
| |
| /** You can use these constants in multiple places safely, if you can guarantee |
| * that you will never alter their internal values, e.g. call setIndex(). |
| */ |
| public static final LocalVariableInstruction THIS = new ALOAD(0); |
| public static final LocalVariableInstruction ALOAD_0 = THIS; |
| public static final LocalVariableInstruction ALOAD_1 = new ALOAD(1); |
| public static final LocalVariableInstruction ALOAD_2 = new ALOAD(2); |
| public static final LocalVariableInstruction ILOAD_0 = new ILOAD(0); |
| public static final LocalVariableInstruction ILOAD_1 = new ILOAD(1); |
| public static final LocalVariableInstruction ILOAD_2 = new ILOAD(2); |
| public static final LocalVariableInstruction ASTORE_0 = new ASTORE(0); |
| public static final LocalVariableInstruction ASTORE_1 = new ASTORE(1); |
| public static final LocalVariableInstruction ASTORE_2 = new ASTORE(2); |
| public static final LocalVariableInstruction ISTORE_0 = new ISTORE(0); |
| public static final LocalVariableInstruction ISTORE_1 = new ISTORE(1); |
| public static final LocalVariableInstruction ISTORE_2 = new ISTORE(2); |
| |
| /** Get object via its opcode, for immutable instructions like |
| * branch instructions entries are set to null. |
| */ |
| private static final Instruction[] INSTRUCTIONS = new Instruction[256]; |
| |
| static { |
| INSTRUCTIONS[Const.NOP] = NOP; |
| INSTRUCTIONS[Const.ACONST_NULL] = ACONST_NULL; |
| INSTRUCTIONS[Const.ICONST_M1] = ICONST_M1; |
| INSTRUCTIONS[Const.ICONST_0] = ICONST_0; |
| INSTRUCTIONS[Const.ICONST_1] = ICONST_1; |
| INSTRUCTIONS[Const.ICONST_2] = ICONST_2; |
| INSTRUCTIONS[Const.ICONST_3] = ICONST_3; |
| INSTRUCTIONS[Const.ICONST_4] = ICONST_4; |
| INSTRUCTIONS[Const.ICONST_5] = ICONST_5; |
| INSTRUCTIONS[Const.LCONST_0] = LCONST_0; |
| INSTRUCTIONS[Const.LCONST_1] = LCONST_1; |
| INSTRUCTIONS[Const.FCONST_0] = FCONST_0; |
| INSTRUCTIONS[Const.FCONST_1] = FCONST_1; |
| INSTRUCTIONS[Const.FCONST_2] = FCONST_2; |
| INSTRUCTIONS[Const.DCONST_0] = DCONST_0; |
| INSTRUCTIONS[Const.DCONST_1] = DCONST_1; |
| INSTRUCTIONS[Const.IALOAD] = IALOAD; |
| INSTRUCTIONS[Const.LALOAD] = LALOAD; |
| INSTRUCTIONS[Const.FALOAD] = FALOAD; |
| INSTRUCTIONS[Const.DALOAD] = DALOAD; |
| INSTRUCTIONS[Const.AALOAD] = AALOAD; |
| INSTRUCTIONS[Const.BALOAD] = BALOAD; |
| INSTRUCTIONS[Const.CALOAD] = CALOAD; |
| INSTRUCTIONS[Const.SALOAD] = SALOAD; |
| INSTRUCTIONS[Const.IASTORE] = IASTORE; |
| INSTRUCTIONS[Const.LASTORE] = LASTORE; |
| INSTRUCTIONS[Const.FASTORE] = FASTORE; |
| INSTRUCTIONS[Const.DASTORE] = DASTORE; |
| INSTRUCTIONS[Const.AASTORE] = AASTORE; |
| INSTRUCTIONS[Const.BASTORE] = BASTORE; |
| INSTRUCTIONS[Const.CASTORE] = CASTORE; |
| INSTRUCTIONS[Const.SASTORE] = SASTORE; |
| INSTRUCTIONS[Const.POP] = POP; |
| INSTRUCTIONS[Const.POP2] = POP2; |
| INSTRUCTIONS[Const.DUP] = DUP; |
| INSTRUCTIONS[Const.DUP_X1] = DUP_X1; |
| INSTRUCTIONS[Const.DUP_X2] = DUP_X2; |
| INSTRUCTIONS[Const.DUP2] = DUP2; |
| INSTRUCTIONS[Const.DUP2_X1] = DUP2_X1; |
| INSTRUCTIONS[Const.DUP2_X2] = DUP2_X2; |
| INSTRUCTIONS[Const.SWAP] = SWAP; |
| INSTRUCTIONS[Const.IADD] = IADD; |
| INSTRUCTIONS[Const.LADD] = LADD; |
| INSTRUCTIONS[Const.FADD] = FADD; |
| INSTRUCTIONS[Const.DADD] = DADD; |
| INSTRUCTIONS[Const.ISUB] = ISUB; |
| INSTRUCTIONS[Const.LSUB] = LSUB; |
| INSTRUCTIONS[Const.FSUB] = FSUB; |
| INSTRUCTIONS[Const.DSUB] = DSUB; |
| INSTRUCTIONS[Const.IMUL] = IMUL; |
| INSTRUCTIONS[Const.LMUL] = LMUL; |
| INSTRUCTIONS[Const.FMUL] = FMUL; |
| INSTRUCTIONS[Const.DMUL] = DMUL; |
| INSTRUCTIONS[Const.IDIV] = IDIV; |
| INSTRUCTIONS[Const.LDIV] = LDIV; |
| INSTRUCTIONS[Const.FDIV] = FDIV; |
| INSTRUCTIONS[Const.DDIV] = DDIV; |
| INSTRUCTIONS[Const.IREM] = IREM; |
| INSTRUCTIONS[Const.LREM] = LREM; |
| INSTRUCTIONS[Const.FREM] = FREM; |
| INSTRUCTIONS[Const.DREM] = DREM; |
| INSTRUCTIONS[Const.INEG] = INEG; |
| INSTRUCTIONS[Const.LNEG] = LNEG; |
| INSTRUCTIONS[Const.FNEG] = FNEG; |
| INSTRUCTIONS[Const.DNEG] = DNEG; |
| INSTRUCTIONS[Const.ISHL] = ISHL; |
| INSTRUCTIONS[Const.LSHL] = LSHL; |
| INSTRUCTIONS[Const.ISHR] = ISHR; |
| INSTRUCTIONS[Const.LSHR] = LSHR; |
| INSTRUCTIONS[Const.IUSHR] = IUSHR; |
| INSTRUCTIONS[Const.LUSHR] = LUSHR; |
| INSTRUCTIONS[Const.IAND] = IAND; |
| INSTRUCTIONS[Const.LAND] = LAND; |
| INSTRUCTIONS[Const.IOR] = IOR; |
| INSTRUCTIONS[Const.LOR] = LOR; |
| INSTRUCTIONS[Const.IXOR] = IXOR; |
| INSTRUCTIONS[Const.LXOR] = LXOR; |
| INSTRUCTIONS[Const.I2L] = I2L; |
| INSTRUCTIONS[Const.I2F] = I2F; |
| INSTRUCTIONS[Const.I2D] = I2D; |
| INSTRUCTIONS[Const.L2I] = L2I; |
| INSTRUCTIONS[Const.L2F] = L2F; |
| INSTRUCTIONS[Const.L2D] = L2D; |
| INSTRUCTIONS[Const.F2I] = F2I; |
| INSTRUCTIONS[Const.F2L] = F2L; |
| INSTRUCTIONS[Const.F2D] = F2D; |
| INSTRUCTIONS[Const.D2I] = D2I; |
| INSTRUCTIONS[Const.D2L] = D2L; |
| INSTRUCTIONS[Const.D2F] = D2F; |
| INSTRUCTIONS[Const.I2B] = I2B; |
| INSTRUCTIONS[Const.I2C] = I2C; |
| INSTRUCTIONS[Const.I2S] = I2S; |
| INSTRUCTIONS[Const.LCMP] = LCMP; |
| INSTRUCTIONS[Const.FCMPL] = FCMPL; |
| INSTRUCTIONS[Const.FCMPG] = FCMPG; |
| INSTRUCTIONS[Const.DCMPL] = DCMPL; |
| INSTRUCTIONS[Const.DCMPG] = DCMPG; |
| INSTRUCTIONS[Const.IRETURN] = IRETURN; |
| INSTRUCTIONS[Const.LRETURN] = LRETURN; |
| INSTRUCTIONS[Const.FRETURN] = FRETURN; |
| INSTRUCTIONS[Const.DRETURN] = DRETURN; |
| INSTRUCTIONS[Const.ARETURN] = ARETURN; |
| INSTRUCTIONS[Const.RETURN] = RETURN; |
| INSTRUCTIONS[Const.ARRAYLENGTH] = ARRAYLENGTH; |
| INSTRUCTIONS[Const.ATHROW] = ATHROW; |
| INSTRUCTIONS[Const.MONITORENTER] = MONITORENTER; |
| INSTRUCTIONS[Const.MONITOREXIT] = MONITOREXIT; |
| } |
| |
| private InstructionConst() { } // non-instantiable |
| |
| /** |
| * Gets the Instruction. |
| * @param index the index, e.g. {@link Const#RETURN} |
| * @return the entry from the private INSTRUCTIONS table |
| */ |
| public static Instruction getInstruction(final int index) { |
| return INSTRUCTIONS[index]; |
| } |
| } |
