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
  21  * questions.
  22  *
  23  */
  24 
  25 /**
  26 * @test
  27 * @summary Add C2 x86 Superword support for scalar sum reduction optimizations : float test
  28 *
  29 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=2 SumRed_Float
  30 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=2 SumRed_Float
  31 *
  32 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=4 SumRed_Float
  33 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=4 SumRed_Float
  34 *
  35 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=8 SumRed_Float
  36 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=8 SumRed_Float
  37 *
  38 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=16 SumRed_Float
  39 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=16 SumRed_Float
  40 */
  41 
  42 public class SumRed_Float
  43 {
  44   public static void main(String[] args) throws Exception {
  45     float[] a = new float[256*1024];
  46     float[] b = new float[256*1024];
  47     float[] c = new float[256*1024];
  48     float[] d = new float[256*1024];
  49     sumReductionInit(a,b,c);
  50     float total = 0;
  51     float valid = (float)4.611686E18;
  52     for(int j = 0; j < 20000; j++) {
  53       total = sumReductionImplement(a,b,c,d,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 sumReductionInit(
  65     float[] a, 
  66     float[] b, 
  67     float[] c)
  68   {
  69     for(int j = 0; j < 1; j++)
  70     {
  71       for(int i = 0; i < a.length; i++)
  72       { 
  73         a[i] = i * 1 + j;
  74         b[i] = i * 1 - j;
  75         c[i] = i + j;
  76       }
  77     }
  78   }
  79 
  80   public static float sumReductionImplement(
  81     float[] a, 
  82     float[] b, 
  83     float[] c, 
  84     float[] d, 
  85     float total) 
  86   {
  87     for(int i = 0; i < a.length; i++)
  88     {
  89       d[i]= (a[i] * b[i]) + (a[i] * c[i]) + (b[i] * c[i]);
  90       total += d[i];
  91     }
  92     return total;
  93   }
  94 
  95 }