1 /*
   2  * Copyright (c) 2015, 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 
  25 /**
  26  * @test
  27  * @bug 8074981
  28  * @summary Add C2 x86 Superword support for scalar sum reduction optimizations : double test
  29  *
  30  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=2 SumRed_Double
  31  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=2 SumRed_Double
  32  *
  33  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=4 SumRed_Double
  34  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=4 SumRed_Double
  35  *
  36  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=8 SumRed_Double
  37  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=8 SumRed_Double
  38  *
  39  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=16 SumRed_Double
  40  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=16 SumRed_Double
  41  */
  42 
  43 public class SumRed_Double
  44 {
  45   public static void main(String[] args) throws Exception {
  46     double[] a = new double[256*1024];
  47     double[] b = new double[256*1024];
  48     double[] c = new double[256*1024];
  49     double[] d = new double[256*1024];
  50     sumReductionInit(a,b,c);
  51     double total = 0;
  52     double valid = 3.602859086516129E20;
  53     for(int j = 0; j < 20000; j++) {
  54       total = sumReductionImplement(a,b,c,d,total);
  55     }
  56     if(total == valid) {
  57       System.out.println("Success");
  58     } else {
  59       System.out.println("Invalid sum of elements variable in total: " + total);
  60       System.out.println("Expected value = " + valid);
  61       throw new Exception("Failed");
  62     }
  63   }
  64 
  65   public static void sumReductionInit(
  66     double[] a,
  67     double[] b,
  68     double[] c)
  69   {
  70     for(int j = 0; j < 1; j++)
  71     {
  72       for(int i = 0; i < a.length; i++)
  73       {
  74         a[i] = i * 1 + j;
  75         b[i] = i * 1 - j;
  76         c[i] = i + j;
  77       }
  78     }
  79   }
  80 
  81   public static double sumReductionImplement(
  82     double[] a,
  83     double[] b,
  84     double[] c,
  85     double[] d,
  86     double total)
  87   {
  88     for(int i = 0; i < a.length; i++)
  89     {
  90       d[i]= (a[i] * b[i]) + (a[i] * c[i]) + (b[i] * c[i]);
  91       total += d[i];
  92     }
  93     return total;
  94   }
  95 
  96 }