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 : float test
  29  * @requires os.arch=="x86" | os.arch=="i386" | 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 SumRed_Float
  32  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=2 -XX:CompileThresholdScaling=0.1 SumRed_Float
  33  *
  34  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=4 -XX:CompileThresholdScaling=0.1 SumRed_Float
  35  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=4 -XX:CompileThresholdScaling=0.1 SumRed_Float
  36  *
  37  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=8 -XX:CompileThresholdScaling=0.1 SumRed_Float
  38  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=8 -XX:CompileThresholdScaling=0.1 SumRed_Float
  39  *
  40  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=16 -XX:CompileThresholdScaling=0.1 SumRed_Float
  41  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=16 -XX:CompileThresholdScaling=0.1 SumRed_Float
  42  */
  43 
  44 public class SumRed_Float
  45 {
  46   public static void main(String[] args) throws Exception {
  47     float[] a = new float[256*1024];
  48     float[] b = new float[256*1024];
  49     float[] c = new float[256*1024];
  50     float[] d = new float[256*1024];
  51     sumReductionInit(a,b,c);
  52     float total = 0;
  53     float valid = (float)4.611686E18;
  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     float[] a,
  68     float[] b,
  69     float[] 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 float sumReductionImplement(
  83     float[] a,
  84     float[] b,
  85     float[] c,
  86     float[] d,
  87     float total)
  88   {
  89     for(int i = 0; i < a.length; i++)
  90     {
  91       d[i]= (a[i] * b[i]) + (a[i] * c[i]) + (b[i] * c[i]);
  92       total += d[i];
  93     }
  94     return total;
  95   }
  96 
  97 }