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annotate graal/com.oracle.graal.compiler.hsail.test/src/com/oracle/graal/compiler/hsail/test/IntLookupSwitchTest.java @ 14906:f3a5036cc13c

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javadoc fixes javadoc has become stricter in jdk8
author Bernhard Urban <bernhard.urban@jku.at>
date Mon, 31 Mar 2014 20:51:09 +0200
parents f705fc04faa5
children 64dcb92ee75a
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * Copyright (c) 2009, 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 package com.oracle.graal.compiler.hsail.test;
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25
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26 import org.junit.Test;
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27 import com.oracle.graal.compiler.hsail.test.infra.*;
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28
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29 /**
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30 * Tests a switch statement with integer keys. This test exercises the LOOKUPSWITCH Java bytecode
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31 * instruction.
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32 *
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33 * The HSAIL code generated for this example is a series of cascading compare and branch
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34 * instructions for each case of the switch.
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35 *
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36 * These HSAIL instructions have the following form:
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37 *
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38 *
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39 * //Check whether the key matches the key constant of the case. Store the result of the compare (0
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40 * or 1) in the control register c0.
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41 *
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42 * cmp_eq $c0 &lt;source register&gt;, &lt;key constant for case statement&gt;
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43 *
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44 * //Branch to the corresponding label of that case if there's a match.
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45 *
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46 * cbr $c0 &lt;branch target for that case&gt;
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47 */
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48 public class IntLookupSwitchTest extends GraalKernelTester {
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49
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50 static final int num = 20;
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51 // Output array storing the results of the operations.
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52 @Result protected int[] outArray = new int[num];
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53
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54 /**
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55 * The static "kernel" method we will be testing. This method writes to an output array based on
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56 * switching on an element of an input array. By convention the gid is the last parameter.
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57 *
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58 * Note: Because the key constants used in the cases of the switch are sparsely distributed, the
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59 * Java source compiler compiles this example into the LOOKUPSWITCH bytecode instruction. So
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60 * this is really a test to see whether the HSAIL backend is appropriately handling the
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61 * LOOKUPSWITCH bytecode.
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62 *
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63 * @param out the output array
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64 * @param ina the input array
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65 * @param gid the parameter used to index into the input and output arrays
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66 */
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67 public static void run(int[] out, int[] ina, int gid) {
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68 switch (ina[gid]) {
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69 case 0:
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70 out[gid] = ina[gid];
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71 break;
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72 case 1:
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73 case 2:
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74 break;
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75 case 5:
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76 out[gid] = ina[gid] * ina[gid];
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77 break;
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78 case 10:
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79 out[gid] = -ina[gid];
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80 break;
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81 case 15:
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82 out[gid] = ina[gid] - ina[gid];
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83 break;
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84 case 19:
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85 out[gid] = ina[gid] + ina[gid];
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86 break;
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87 default:
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88 out[gid] = 9;
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89 break;
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90 }
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91 out[gid] += ina[gid];
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92 }
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93
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94 /**
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95 * Tests the HSAIL code generated for this unit test by comparing the result of executing this
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96 * code with the result of executing a sequential Java version of this unit test.
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97 */
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98 @Test
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99 public void test() {
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100 super.testGeneratedHsail();
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101 }
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102
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103 /**
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104 * Initializes the input and output arrays passed to the run routine.
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105 *
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106 * @param in the input array
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107 */
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108 void setupArrays(int[] in) {
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109 for (int i = 0; i < num; i++) {
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110 in[i] = i < num / 2 ? i : -i;
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111 outArray[i] = 0;
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112 }
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113 }
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114
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115 /**
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116 * Dispatches the HSAIL kernel for this test case.
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117 */
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118 @Override
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119 public void runTest() {
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120 int[] inArray = new int[num];
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121 setupArrays(inArray);
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122 dispatchMethodKernel(num, outArray, inArray);
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123 }
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124 }