1 /*
   2  * Copyright (c) 2009, 2013, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 package com.oracle.graal.compiler.hsail.test;
  25 
  26 import org.junit.Test;
  27 import com.oracle.graal.compiler.hsail.test.infra.*;
  28 
  29 /**
  30  * Tests intrinsic for calls to Math.abs(float). Generates an abs_f32 instruction.
  31  */
  32 public class FloatAbsTest extends GraalKernelTester {
  33 
  34     static final int num = 40;
  35     // Output array storing the results of calling Math.abs().
  36     @Result protected float[] outArray = new float[num];
  37 
  38     /**
  39      * The static "kernel" method we will be testing. This method calls Math.abs() on an element of
  40      * an input array and writes the result to the corresponding index of an output array. By
  41      * convention the gid is the last parameter.
  42      * 
  43      * @param out the output array.
  44      * @param ina the input array.
  45      * @param gid the parameter used to index into the input and output arrays.
  46      */
  47     public static void run(float[] out, float[] ina, int gid) {
  48         out[gid] = Math.abs(ina[gid]);
  49     }
  50 
  51     /**
  52      * Tests the HSAIL code generated for this unit test by comparing the result of executing this
  53      * code with the result of executing a sequential Java version of this unit test.
  54      */
  55     @Test
  56     public void test() {
  57         super.testGeneratedHsail();
  58     }
  59 
  60     /**
  61      * Initializes the input and output arrays passed to the run routine.
  62      * 
  63      * @param in the input array.
  64      */
  65     void setupArrays(float[] in) {
  66         for (int i = 0; i < num; i++) {
  67             // Initialize array with positive and negative values as well as corner cases.
  68             if (i == 1) {
  69                 in[i] = Float.NaN;
  70             } else if (i == 2) {
  71                 in[i] = Float.NEGATIVE_INFINITY;
  72             } else if (i == 3) {
  73                 in[i] = Float.POSITIVE_INFINITY;
  74             } else if (i == 4) {
  75                 in[i] = -0;
  76             } else {
  77                 in[i] = i < num / 2 ? i : -i;
  78             }
  79             outArray[i] = 0;
  80         }
  81     }
  82 
  83     /**
  84      * Dispatches the HSAIL kernel for this test case.
  85      */
  86     @Override
  87     public void runTest() {
  88         float[] inArray = new float[num];
  89         setupArrays(inArray);
  90         dispatchMethodKernel(num, outArray, inArray);
  91     }
  92 }