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annotate graal/com.oracle.max.criutils/src/com/oracle/max/criutils/UnsignedMath.java @ 5763:a3d71693e0ce

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removed bytecode disassembly from CodeCacheRuntime into separate BytecodeDisassembler class removed VM call for doing bytecode disassembly added support for explicitly excluding classes from JaCoCo (put '// JaCoCo Exclude' somewhere in the source file) added node intrinsics to MaterializeNode added snippets for the UnsignedMath classes each file opened by CFGPrinter now includes a unique id in its name to avoid a race of multiple threads writing to the same file the IdealGraphPrinter uses the new BytecodeDisassembler mechanism teh UnsignedMath class is exclude from JaCoCo processing as it is used in snippets
author Doug Simon <doug.simon@oracle.com>
date Wed, 04 Jul 2012 21:57:49 +0200
parents 956217932b8c
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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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