1 /* 2 * reserved comment block 3 * DO NOT REMOVE OR ALTER! 4 */ 5 package com.sun.org.apache.bcel.internal.generic; 6 7 /* ==================================================================== 8 * The Apache Software License, Version 1.1 9 * 10 * Copyright (c) 2001 The Apache Software Foundation. All rights 11 * reserved. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 20 * 2. Redistributions in binary form must reproduce the above copyright 21 * notice, this list of conditions and the following disclaimer in 22 * the documentation and/or other materials provided with the 23 * distribution. 24 * 25 * 3. The end-user documentation included with the redistribution, 26 * if any, must include the following acknowledgment: 27 * "This product includes software developed by the 28 * Apache Software Foundation (http://www.apache.org/)." 29 * Alternately, this acknowledgment may appear in the software itself, 30 * if and wherever such third-party acknowledgments normally appear. 31 * 32 * 4. The names "Apache" and "Apache Software Foundation" and 33 * "Apache BCEL" must not be used to endorse or promote products 34 * derived from this software without prior written permission. For 35 * written permission, please contact apache@apache.org. 36 * 37 * 5. Products derived from this software may not be called "Apache", 38 * "Apache BCEL", nor may "Apache" appear in their name, without 39 * prior written permission of the Apache Software Foundation. 40 * 41 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED 42 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 43 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 44 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR 45 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 46 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 47 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 48 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 49 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 50 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 51 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 52 * SUCH DAMAGE. 53 * ==================================================================== 54 * 55 * This software consists of voluntary contributions made by many 56 * individuals on behalf of the Apache Software Foundation. For more 57 * information on the Apache Software Foundation, please see 58 * <http://www.apache.org/>. 59 */ 60 import com.sun.org.apache.bcel.internal.Constants; 61 /** 62 * Super class for the family of arithmetic instructions. 63 * 64 * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A> 65 */ 66 public abstract class ArithmeticInstruction extends Instruction 67 implements TypedInstruction, StackProducer, StackConsumer { 68 /** 69 * Empty constructor needed for the Class.newInstance() statement in 70 * Instruction.readInstruction(). Not to be used otherwise. 71 */ ArithmeticInstruction()72 ArithmeticInstruction() {} 73 74 /** 75 * @param opcode of instruction 76 */ ArithmeticInstruction(short opcode)77 protected ArithmeticInstruction(short opcode) { 78 super(opcode, (short)1); 79 } 80 81 /** @return type associated with the instruction 82 */ getType(ConstantPoolGen cp)83 public Type getType(ConstantPoolGen cp) { 84 switch(opcode) { 85 case Constants.DADD: case Constants.DDIV: case Constants.DMUL: 86 case Constants.DNEG: case Constants.DREM: case Constants.DSUB: 87 return Type.DOUBLE; 88 89 case Constants.FADD: case Constants.FDIV: case Constants.FMUL: 90 case Constants.FNEG: case Constants.FREM: case Constants.FSUB: 91 return Type.FLOAT; 92 93 case Constants.IADD: case Constants.IAND: case Constants.IDIV: 94 case Constants.IMUL: case Constants.INEG: case Constants.IOR: case Constants.IREM: 95 case Constants.ISHL: case Constants.ISHR: case Constants.ISUB: 96 case Constants.IUSHR: case Constants.IXOR: 97 return Type.INT; 98 99 case Constants.LADD: case Constants.LAND: case Constants.LDIV: 100 case Constants.LMUL: case Constants.LNEG: case Constants.LOR: case Constants.LREM: 101 case Constants.LSHL: case Constants.LSHR: case Constants.LSUB: 102 case Constants.LUSHR: case Constants.LXOR: 103 return Type.LONG; 104 105 default: // Never reached 106 throw new ClassGenException("Unknown type " + opcode); 107 } 108 } 109 } 110