001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 * 017 */ 018package org.apache.bcel.generic; 019 020import org.apache.bcel.Const; 021 022/** 023 * Super class for the family of arithmetic instructions. 024 * 025 * @version $Id: ArithmeticInstruction.java 1747278 2016-06-07 17:28:43Z britter $ 026 */ 027public abstract class ArithmeticInstruction extends Instruction implements TypedInstruction, 028 StackProducer, StackConsumer { 029 030 /** 031 * Empty constructor needed for the Class.newInstance() statement in 032 * Instruction.readInstruction(). Not to be used otherwise. 033 */ 034 ArithmeticInstruction() { 035 } 036 037 038 /** 039 * @param opcode of instruction 040 */ 041 protected ArithmeticInstruction(final short opcode) { 042 super(opcode, (short) 1); 043 } 044 045 046 /** @return type associated with the instruction 047 */ 048 @Override 049 public Type getType( final ConstantPoolGen cp ) { 050 final short _opcode = super.getOpcode(); 051 switch (_opcode) { 052 case Const.DADD: 053 case Const.DDIV: 054 case Const.DMUL: 055 case Const.DNEG: 056 case Const.DREM: 057 case Const.DSUB: 058 return Type.DOUBLE; 059 case Const.FADD: 060 case Const.FDIV: 061 case Const.FMUL: 062 case Const.FNEG: 063 case Const.FREM: 064 case Const.FSUB: 065 return Type.FLOAT; 066 case Const.IADD: 067 case Const.IAND: 068 case Const.IDIV: 069 case Const.IMUL: 070 case Const.INEG: 071 case Const.IOR: 072 case Const.IREM: 073 case Const.ISHL: 074 case Const.ISHR: 075 case Const.ISUB: 076 case Const.IUSHR: 077 case Const.IXOR: 078 return Type.INT; 079 case Const.LADD: 080 case Const.LAND: 081 case Const.LDIV: 082 case Const.LMUL: 083 case Const.LNEG: 084 case Const.LOR: 085 case Const.LREM: 086 case Const.LSHL: 087 case Const.LSHR: 088 case Const.LSUB: 089 case Const.LUSHR: 090 case Const.LXOR: 091 return Type.LONG; 092 default: // Never reached 093 throw new ClassGenException("Unknown type " + _opcode); 094 } 095 } 096}