Mercurial > hg > graal-compiler

annotate graal/com.oracle.max.cri/src/com/oracle/max/cri/intrinsics/UnsignedMath.java @ 3733:e233f5660da4

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Added Java files from Maxine project.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Sat, 17 Dec 2011 19:59:18 +0100
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3733
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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.cri.intrinsics;
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24
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25 import static com.oracle.max.cri.intrinsics.IntrinsicIDs.*;
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26
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27 import java.math.*;
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28
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29 import com.sun.max.annotate.*;
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30
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31 /**
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32 * {@link INTRINSIC} method definitions for unsigned comparisons.
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33 * All methods have correct, but slow, standard Java implementations so that
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34 * they can be used with compilers not supporting the intrinsics.
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35 */
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36 public class UnsignedMath {
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37 private static final long MASK = 0xffffffffL;
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38
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39 /**
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40 * @see IntrinsicIDs#UCMP_AT
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41 */
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42 @INTRINSIC(UCMP_AT)
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43 public static boolean aboveThan(int a, int b) {
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44 return (a & MASK) > (b & MASK);
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45 }
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46
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47 /**
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48 * @see IntrinsicIDs#UCMP_AE
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49 */
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50 @INTRINSIC(UCMP_AE)
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51 public static boolean aboveOrEqual(int a, int b) {
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52 return (a & MASK) >= (b & MASK);
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53 }
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54
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55 /**
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56 * @see IntrinsicIDs#UCMP_BT
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57 */
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58 @INTRINSIC(UCMP_BT)
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59 public static boolean belowThan(int a, int b) {
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60 return (a & MASK) < (b & MASK);
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61 }
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62
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63 /**
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64 * @see IntrinsicIDs#UCMP_BE
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65 */
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66 @INTRINSIC(UCMP_BE)
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67 public static boolean belowOrEqual(int a, int b) {
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68 return (a & MASK) <= (b & MASK);
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69 }
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70
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71
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72 /**
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73 * @see IntrinsicIDs#UCMP_AT
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74 */
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75 @INTRINSIC(UCMP_AT)
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76 public static boolean aboveThan(long a, long b) {
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77 return (a > b) ^ ((a < 0) != (b < 0));
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78 }
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79
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80 /**
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81 * @see IntrinsicIDs#UCMP_AE
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82 */
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83 @INTRINSIC(UCMP_AE)
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84 public static boolean aboveOrEqual(long a, long b) {
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85 return (a >= b) ^ ((a < 0) != (b < 0));
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86 }
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87
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88 /**
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89 * @see IntrinsicIDs#UCMP_BT
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90 */
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91 @INTRINSIC(UCMP_BT)
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92 public static boolean belowThan(long a, long b) {
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93 return (a < b) ^ ((a < 0) != (b < 0));
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94 }
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95
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96 /**
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97 * @see IntrinsicIDs#UCMP_BE
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98 */
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99 @INTRINSIC(UCMP_BE)
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100 public static boolean belowOrEqual(long a, long b) {
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101 return (a <= b) ^ ((a < 0) != (b < 0));
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102 }
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103
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104
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105 /**
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106 * @see IntrinsicIDs#UDIV
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107 */
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108 @INTRINSIC(UDIV)
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109 public static int divide(int a, int b) {
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110 return (int) ((a & MASK) / (b & MASK));
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111 }
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112
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113 /**
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114 * @see IntrinsicIDs#UREM
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115 */
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116 @INTRINSIC(UREM)
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117 public static int remainder(int a, int b) {
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118 return (int) ((a & MASK) % (b & MASK));
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119 }
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120
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121
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122 /**
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123 * @see IntrinsicIDs#UDIV
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124 */
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125 @INTRINSIC(UDIV)
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126 public static long divide(long a, long b) {
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127 return bi(a).divide(bi(b)).longValue();
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128 }
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129
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130 /**
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131 * @see IntrinsicIDs#UREM
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132 */
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133 @INTRINSIC(UREM)
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134 public static long remainder(long a, long b) {
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135 return bi(a).remainder(bi(b)).longValue();
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136 }
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137
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138 private static BigInteger bi(long unsigned) {
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139 return unsigned >= 0 ? BigInteger.valueOf(unsigned) : BigInteger.valueOf(unsigned & 0x7fffffffffffffffL).setBit(63);
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140 }
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141 }
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142