1/*
2 * Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23package org.graalvm.compiler.core.common.type;
24
25import java.nio.ByteBuffer;
26import java.util.Objects;
27
28import jdk.vm.ci.meta.SerializableConstant;
29
30/**
31 * Type describing values that support arithmetic operations.
32 */
33public abstract class ArithmeticStamp extends Stamp {
34
35    private final ArithmeticOpTable ops;
36
37    protected ArithmeticStamp(ArithmeticOpTable ops) {
38        this.ops = ops;
39    }
40
41    public ArithmeticOpTable getOps() {
42        return ops;
43    }
44
45    public abstract SerializableConstant deserialize(ByteBuffer buffer);
46
47    @Override
48    public Stamp improveWith(Stamp other) {
49        if (this.isCompatible(other)) {
50            return this.join(other);
51        }
52        // Cannot improve, because stamps are not compatible.
53        return this;
54    }
55
56    @Override
57    public int hashCode() {
58        final int prime = 31;
59        int result = 1;
60        result = prime * result + ops.hashCode();
61        return result;
62    }
63
64    @Override
65    public boolean equals(Object obj) {
66        if (this == obj) {
67            return true;
68        }
69        if (!(obj instanceof ArithmeticStamp)) {
70            return false;
71        }
72        assert Objects.equals(ops, ((ArithmeticStamp) obj).ops) : ops + " vs. " + ((ArithmeticStamp) obj).ops;
73        return true;
74    }
75}
76