001/*
002 * Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation.
008 *
009 * This code is distributed in the hope that it will be useful, but WITHOUT
010 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
011 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
012 * version 2 for more details (a copy is included in the LICENSE file that
013 * accompanied this code).
014 *
015 * You should have received a copy of the GNU General Public License version
016 * 2 along with this work; if not, write to the Free Software Foundation,
017 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
018 *
019 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
020 * or visit www.oracle.com if you need additional information or have any
021 * questions.
022 */
023package com.oracle.graal.compiler.common.type;
024
025import java.nio.*;
026import java.util.*;
027
028import jdk.internal.jvmci.meta.*;
029
030/**
031 * Type describing values that support arithmetic operations.
032 */
033public abstract class ArithmeticStamp extends Stamp {
034
035    private final ArithmeticOpTable ops;
036
037    protected ArithmeticStamp(ArithmeticOpTable ops) {
038        this.ops = ops;
039    }
040
041    public ArithmeticOpTable getOps() {
042        return ops;
043    }
044
045    public abstract SerializableConstant deserialize(ByteBuffer buffer);
046
047    @Override
048    public Stamp improveWith(Stamp other) {
049        return this.join(other);
050    }
051
052    @Override
053    public int hashCode() {
054        final int prime = 31;
055        int result = 1;
056        result = prime * result + ops.hashCode();
057        return result;
058    }
059
060    @Override
061    public boolean equals(Object obj) {
062        if (this == obj) {
063            return true;
064        }
065        if (!(obj instanceof ArithmeticStamp)) {
066            return false;
067        }
068        assert Objects.equals(ops, ((ArithmeticStamp) obj).ops);
069        return true;
070    }
071}