1 /*
   2  * Copyright (c) 2014, 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
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  24 
  25 /**
  26 * @test
  27 * @bug 8135028
  28 * @summary Add C2 x86 Superword support for scalar sum reduction optimizations : double sqrt test
  29 * @requires os.arch=="x86" | os.arch=="amd64" | os.arch=="x86_64" | os.arch=="aarch64"
  30 *
  31 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=2 -XX:CompileThresholdScaling=0.1 SumRedSqrt_Double
  32 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=2 -XX:CompileThresholdScaling=0.1 SumRedSqrt_Double
  33 *
  34 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=4 -XX:CompileThresholdScaling=0.1 SumRedSqrt_Double
  35 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=4 -XX:CompileThresholdScaling=0.1 SumRedSqrt_Double
  36 *
  37 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=8 -XX:CompileThresholdScaling=0.1 SumRedSqrt_Double
  38 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=8 -XX:CompileThresholdScaling=0.1 SumRedSqrt_Double
  39 *
  40 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=16 -XX:CompileThresholdScaling=0.1 SumRedSqrt_Double
  41 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=16 -XX:CompileThresholdScaling=0.1 SumRedSqrt_Double
  42 */
  43 
  44 public class SumRedSqrt_Double
  45 {
  46   public static void main(String[] args) throws Exception {
  47     double[] a = new double[256*1024];
  48     double[] b = new double[256*1024];
  49     double[] c = new double[256*1024];
  50     double[] d = new double[256*1024];
  51     sumReductionInit(a,b,c);
  52     double total = 0;
  53     double valid = 2.06157643776E14;
  54     for(int j = 0; j < 2000; j++) {
  55       total = sumReductionImplement(a,b,c,d,total);
  56     }
  57     if(total == valid) {
  58       System.out.println("Success");
  59     } else {
  60       System.out.println("Invalid sum of elements variable in total: " + total);
  61       System.out.println("Expected value = " + valid);
  62       throw new Exception("Failed");
  63     }
  64   }
  65 
  66   public static void sumReductionInit(
  67     double[] a,
  68     double[] b,
  69     double[] c)
  70   {
  71     for(int j = 0; j < 1; j++)
  72     {
  73       for(int i = 0; i < a.length; i++)
  74       {
  75         a[i] = i * 1 + j;
  76         b[i] = i * 1 - j;
  77         c[i] = i + j;
  78       }
  79     }
  80   }
  81 
  82   public static double sumReductionImplement(
  83     double[] a,
  84     double[] b,
  85     double[] c,
  86     double[] d,
  87     double total)
  88   {
  89     for(int i = 0; i < a.length; i++)
  90     {
  91       d[i]= Math.sqrt(a[i] * b[i]) + Math.sqrt(a[i] * c[i]) + Math.sqrt(b[i] * c[i]);
  92       total += d[i];
  93     }
  94     return total;
  95   }
  96 
  97 }