/* * 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]; } }