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 8138583
  28  * @summary Add C2 AArch64 Superword support for scalar sum reduction optimizations : double abs & neg test
  29  * @requires os.arch=="aarch64"
  30  *
  31  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=2 -XX:CompileThresholdScaling=0.1 SumRedAbsNeg_Double
  32  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=2 -XX:CompileThresholdScaling=0.1 SumRedAbsNeg_Double
  33  *
  34  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=4 -XX:CompileThresholdScaling=0.1 SumRedAbsNeg_Double
  35  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=4 -XX:CompileThresholdScaling=0.1 SumRedAbsNeg_Double
  36  *
  37  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=8 -XX:CompileThresholdScaling=0.1 SumRedAbsNeg_Double
  38  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=8 -XX:CompileThresholdScaling=0.1 SumRedAbsNeg_Double
  39  *
  40  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=16 -XX:CompileThresholdScaling=0.1 SumRedAbsNeg_Double
  41  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=16 -XX:CompileThresholdScaling=0.1 SumRedAbsNeg_Double
  42  */
  43 
  44 public class SumRedAbsNeg_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 = 3.6028590866691944E19;
  54 
  55     for(int j = 0; j < 2000; j++) {
  56       total = sumReductionImplement(a,b,c,d,total);
  57     }
  58 
  59     if(total == valid) {
  60       System.out.println("Success");
  61     } else {
  62       System.out.println("Invalid sum of elements variable in total: " + total);
  63       System.out.println("Expected value = " + valid);
  64       throw new Exception("Failed");
  65     }
  66   }
  67 
  68   public static void sumReductionInit(
  69     double[] a,
  70     double[] b,
  71     double[] c)
  72   {
  73     for(int j = 0; j < 1; j++)
  74     {
  75       for(int i = 0; i < a.length; i++)
  76       {
  77         a[i] = i * 1 + j;
  78         b[i] = i * 1 - j;
  79         c[i] = i + j;
  80       }
  81     }
  82   }
  83 
  84   public static double sumReductionImplement(
  85     double[] a,
  86     double[] b,
  87     double[] c,
  88     double[] d,
  89     double total)
  90   {
  91     for(int i = 0; i < a.length; i++)
  92     {
  93       d[i] = Math.abs(-a[i] * -b[i]) + Math.abs(-a[i] * -c[i]) + Math.abs(-b[i] * -c[i]);
  94       total += d[i];
  95     }
  96     return total;
  97   }
  98 
  99 }