001/* 002 * Copyright (c) 2015, 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.util; 024 025/** 026 * Provides low-level value checks and conversion for signed and unsigned values of size 1, 2, and 4 027 * bytes. 028 */ 029public class TypeConversion { 030 031 public static boolean isS1(long value) { 032 return value >= Byte.MIN_VALUE && value <= Byte.MAX_VALUE; 033 } 034 035 public static boolean isU1(long value) { 036 return value >= 0 && value <= 0xFF; 037 } 038 039 public static boolean isS2(long value) { 040 return value >= Short.MIN_VALUE && value <= Short.MAX_VALUE; 041 } 042 043 public static boolean isU2(long value) { 044 return value >= 0 && value <= 0xFFFF; 045 } 046 047 public static boolean isS4(long value) { 048 return value >= Integer.MIN_VALUE && value <= Integer.MAX_VALUE; 049 } 050 051 public static boolean isU4(long value) { 052 return value >= 0 && value <= 0xFFFFFFFFL; 053 } 054 055 public static byte asS1(long value) { 056 assert isS1(value); 057 return (byte) value; 058 } 059 060 public static byte asU1(long value) { 061 assert isU1(value); 062 return (byte) value; 063 } 064 065 public static short asS2(long value) { 066 assert isS2(value); 067 return (short) value; 068 } 069 070 public static short asU2(long value) { 071 assert isU2(value); 072 return (short) value; 073 } 074 075 public static int asS4(long value) { 076 assert isS4(value); 077 return (int) value; 078 } 079 080 public static int asU4(long value) { 081 assert isU4(value); 082 return (int) value; 083 } 084}