001/* 002 * Copyright (c) 2014, 2014, 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 jdk.internal.jvmci.meta.*; 026 027/** 028 * Type describing primitive values. 029 */ 030public abstract class PrimitiveStamp extends ArithmeticStamp { 031 032 private final int bits; 033 034 protected PrimitiveStamp(int bits, ArithmeticOpTable ops) { 035 super(ops); 036 this.bits = bits; 037 } 038 039 /** 040 * The width in bits of the value described by this stamp. 041 */ 042 public int getBits() { 043 return bits; 044 } 045 046 public static int getBits(Stamp stamp) { 047 if (stamp instanceof PrimitiveStamp) { 048 return ((PrimitiveStamp) stamp).getBits(); 049 } else { 050 return 0; 051 } 052 } 053 054 @Override 055 public Constant readConstant(MemoryAccessProvider provider, Constant base, long displacement) { 056 return provider.readPrimitiveConstant(getStackKind(), base, displacement, getBits()); 057 } 058 059 @Override 060 public int hashCode() { 061 final int prime = 31; 062 int result = super.hashCode(); 063 result = prime * result + bits; 064 return result; 065 } 066 067 @Override 068 public boolean equals(Object obj) { 069 if (this == obj) { 070 return true; 071 } 072 if (!(obj instanceof PrimitiveStamp)) { 073 return false; 074 } 075 PrimitiveStamp other = (PrimitiveStamp) obj; 076 if (bits != other.bits) { 077 return false; 078 } 079 return super.equals(obj); 080 } 081}