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 * 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,

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package com.sun.org.apache.bcel.internal.generic;

import com.sun.org.apache.bcel.internal.Const;

/**

 * Super class for the family of arithmetic instructions.

 *

 */

public abstract class ArithmeticInstruction extends Instruction implements TypedInstruction,

        StackProducer, StackConsumer {

    /**

     * Empty constructor needed for Instruction.readInstruction.

     * Not to be used otherwise.

     */

    ArithmeticInstruction() {

    }

    /**

     * @param opcode of instruction

     */

    protected ArithmeticInstruction(final short opcode) {

        super(opcode, (short) 1);

    }

    /** @return type associated with the instruction

     */

    @Override

    public Type getType( final ConstantPoolGen cp ) {

        final short _opcode = super.getOpcode();

        switch (_opcode) {

            case Const.DADD:

            case Const.DDIV:

            case Const.DMUL:

            case Const.DNEG:

            case Const.DREM:

            case Const.DSUB:

                return Type.DOUBLE;

            case Const.FADD:

            case Const.FDIV:

            case Const.FMUL:

            case Const.FNEG:

            case Const.FREM:

            case Const.FSUB:

                return Type.FLOAT;

            case Const.IADD:

            case Const.IAND:

            case Const.IDIV:

            case Const.IMUL:

            case Const.INEG:

            case Const.IOR:

            case Const.IREM:

            case Const.ISHL:

            case Const.ISHR:

            case Const.ISUB:

            case Const.IUSHR:

            case Const.IXOR:

                return Type.INT;

            case Const.LADD:

            case Const.LAND:

            case Const.LDIV:

            case Const.LMUL:

            case Const.LNEG:

            case Const.LOR:

            case Const.LREM:

            case Const.LSHL:

            case Const.LSHR:

            case Const.LSUB:

            case Const.LUSHR:

            case Const.LXOR:

                return Type.LONG;

            default: // Never reached

                throw new ClassGenException("Unknown type " + _opcode);

        }

    }

}