Mercurial > hg > truffle
annotate test/compiler/7088419/CRCTest.java @ 17470:c89630a122b4 hs25.20-b00 jdk8u20-b00
Added tag jdk8-b123 for changeset 591135a7d6f9
author | katleman |
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date | Fri, 10 Jan 2014 08:31:47 -0800 |
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1 /* |
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2 * Copyright (c) 2013, 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 |
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24 /* |
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25 @test |
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26 @bug 7088419 |
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27 @run main CRCTest |
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28 @summary Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32 and java.util.zip.Adler32 |
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29 */ |
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30 |
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31 import java.nio.ByteBuffer; |
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32 import java.util.zip.CRC32; |
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33 import java.util.zip.Checksum; |
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34 |
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35 public class CRCTest { |
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36 |
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37 public static void main(String[] args) throws Exception { |
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38 |
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39 byte[] b = initializedBytes(4096 * 4096); |
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40 |
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41 { |
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42 CRC32 crc1 = new CRC32(); |
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43 CRC32 crc2 = new CRC32(); |
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44 CRC32 crc3 = new CRC32(); |
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45 CRC32 crc4 = new CRC32(); |
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46 |
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47 crc1.update(b, 0, b.length); |
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48 updateSerial(crc2, b, 0, b.length); |
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49 updateDirect(crc3, b, 0, b.length); |
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50 updateSerialSlow(crc4, b, 0, b.length); |
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51 |
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52 check(crc1, crc2); |
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53 check(crc3, crc4); |
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54 check(crc1, crc3); |
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55 |
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56 crc1.update(17); |
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57 crc2.update(17); |
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58 crc3.update(17); |
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59 crc4.update(17); |
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60 |
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61 crc1.update(b, 1, b.length-2); |
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62 updateSerial(crc2, b, 1, b.length-2); |
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63 updateDirect(crc3, b, 1, b.length-2); |
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64 updateSerialSlow(crc4, b, 1, b.length-2); |
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65 |
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66 check(crc1, crc2); |
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67 check(crc3, crc4); |
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68 check(crc1, crc3); |
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69 |
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70 report("finished huge crc", crc1, crc2, crc3, crc4); |
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71 |
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72 for (int i = 0; i < 256; i++) { |
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73 for (int j = 0; j < 256; j += 1) { |
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74 crc1.update(b, i, j); |
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75 updateSerial(crc2, b, i, j); |
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76 updateDirect(crc3, b, i, j); |
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77 updateSerialSlow(crc4, b, i, j); |
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78 |
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79 check(crc1, crc2); |
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80 check(crc3, crc4); |
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81 check(crc1, crc3); |
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82 |
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83 } |
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84 } |
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85 |
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86 report("finished small survey crc", crc1, crc2, crc3, crc4); |
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87 } |
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88 |
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89 } |
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90 |
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91 private static void report(String s, Checksum crc1, Checksum crc2, |
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92 Checksum crc3, Checksum crc4) { |
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93 System.out.println(s + ", crc1 = " + crc1.getValue() + |
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94 ", crc2 = " + crc2.getValue()+ |
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95 ", crc3 = " + crc3.getValue()+ |
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96 ", crc4 = " + crc4.getValue()); |
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97 } |
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98 |
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99 private static void check(Checksum crc1, Checksum crc2) throws Exception { |
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100 if (crc1.getValue() != crc2.getValue()) { |
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101 String s = "value 1 = " + crc1.getValue() + ", value 2 = " + crc2.getValue(); |
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102 System.err.println(s); |
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103 throw new Exception(s); |
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104 } |
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105 } |
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106 |
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107 private static byte[] initializedBytes(int M) { |
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108 byte[] bytes = new byte[M]; |
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109 for (int i = 0; i < bytes.length; i++) { |
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110 bytes[i] = (byte) i; |
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111 } |
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112 return bytes; |
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113 } |
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114 |
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115 private static void updateSerial(Checksum crc, byte[] b, int start, int length) { |
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116 for (int i = 0; i < length; i++) |
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117 crc.update(b[i+start]); |
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118 } |
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119 |
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120 private static void updateSerialSlow(Checksum crc, byte[] b, int start, int length) { |
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121 for (int i = 0; i < length; i++) |
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122 crc.update(b[i+start]); |
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123 crc.getValue(); |
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124 } |
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125 |
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126 private static void updateDirect(CRC32 crc3, byte[] b, int start, int length) { |
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127 ByteBuffer buf = ByteBuffer.allocateDirect(length); |
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128 buf.put(b, start, length); |
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129 buf.flip(); |
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130 crc3.update(buf); |
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131 } |
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132 } |