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 product reduction optimizations : float test
  29  *
  30  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=2 ProdRed_Float
  31  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=2 ProdRed_Float
  32  *
  33  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=4 ProdRed_Float
  34  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=4 ProdRed_Float
  35  *
  36  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=8 ProdRed_Float
  37  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=8 ProdRed_Float
  38  *
  39  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=16 ProdRed_Float
  40  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=16 ProdRed_Float
  41  */
  42 
  43 public class ProdRed_Float
  44 {
  45   public static void main(String[] args) throws Exception {
  46     float[] a = new float[256*1024];
  47     float[] b = new float[256*1024];
  48     prodReductionInit(a,b);
  49     float valid = 20000;
  50     float total = 0;
  51     for(int j = 0; j < 20000; j++) {
  52       total = j + 1;
  53       total = prodReductionImplement(a,b, total);
  54     }
  55     if(total == valid) {
  56       System.out.println("Success");
  57     } else {
  58       System.out.println("Invalid sum of elements variable in total: " + total);
  59       System.out.println("Expected value = " + valid);
  60       throw new Exception("Failed");
  61     }
  62   }
  63 
  64   public static void prodReductionInit(float[] a, float[] b)
  65   {
  66     for(int i = 0; i < a.length; i++)
  67     {
  68       a[i] = i + 2;
  69       b[i] = i + 1;
  70     }
  71   }
  72 
  73   public static float prodReductionImplement(float[] a, float[] b, float total)
  74   {
  75     for(int i = 0; i < a.length; i++)
  76     {
  77       total *= a[i] - b[i];
  78     }
  79     return total;
  80   }
  81 
  82 }