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}