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annotate graal/com.oracle.max.criutils/src/com/oracle/max/criutils/UnsignedMath.java @ 5774:a1db0ea58b53

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Removed left over Ci* prefixed identifiers
author Doug Simon <doug.simon@oracle.com>
date Thu, 05 Jul 2012 21:39:22 +0200
parents a3d71693e0ce
children
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1 /*
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2 * Copyright (c) 2011, 2011, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.oracle.max.criutils;
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24
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25 //JaCoCo Exclude
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26
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27 /**
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28 * Utilities for unsigned comparisons.
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29 * All methods have correct, but slow, standard Java implementations so that
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30 * they can be used with compilers not supporting the intrinsics.
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31 */
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32 public class UnsignedMath {
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33 private static final long MASK = 0xffffffffL;
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34
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35 /**
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36 * Unsigned comparison aboveThan for two numbers.
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37 */
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38 public static boolean aboveThan(int a, int b) {
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39 return (a & MASK) > (b & MASK);
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40 }
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41
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42 /**
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43 * Unsigned comparison aboveOrEqual for two numbers.
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44 */
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45 public static boolean aboveOrEqual(int a, int b) {
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46 return (a & MASK) >= (b & MASK);
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47 }
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48
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49 /**
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50 * Unsigned comparison belowThan for two numbers.
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51 */
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52 public static boolean belowThan(int a, int b) {
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53 return (a & MASK) < (b & MASK);
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54 }
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55
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56 /**
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57 * Unsigned comparison belowOrEqual for two numbers.
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58 */
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59 public static boolean belowOrEqual(int a, int b) {
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60 return (a & MASK) <= (b & MASK);
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61 }
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63 /**
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64 * Unsigned comparison aboveThan for two numbers.
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65 */
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66 public static boolean aboveThan(long a, long b) {
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67 return (a > b) ^ ((a < 0) != (b < 0));
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68 }
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70 /**
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71 * Unsigned comparison aboveOrEqual for two numbers.
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72 */
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73 public static boolean aboveOrEqual(long a, long b) {
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74 return (a >= b) ^ ((a < 0) != (b < 0));
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75 }
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77 /**
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78 * Unsigned comparison belowThan for two numbers.
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79 */
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80 public static boolean belowThan(long a, long b) {
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81 return (a < b) ^ ((a < 0) != (b < 0));
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82 }
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84 /**
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85 * Unsigned comparison belowOrEqual for two numbers.
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86 */
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87 public static boolean belowOrEqual(long a, long b) {
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88 return (a <= b) ^ ((a < 0) != (b < 0));
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89 }
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90 }
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91