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  *

    30  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=2 -XX:CompileThresholdScaling=0.1 SumRed_Float

    31  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=2 -XX:CompileThresholdScaling=0.1 SumRed_Float

    32  *

    33  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=4 -XX:CompileThresholdScaling=0.1 SumRed_Float

    34  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=4 -XX:CompileThresholdScaling=0.1 SumRed_Float

    35  *

    36  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=8 -XX:CompileThresholdScaling=0.1 SumRed_Float

    37  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=8 -XX:CompileThresholdScaling=0.1 SumRed_Float

    38  *

    39  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=16 -XX:CompileThresholdScaling=0.1 SumRed_Float

    40  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-SuperWordReductions -XX:LoopUnrollLimit=250 -XX:LoopMaxUnroll=16 -XX:CompileThresholdScaling=0.1 SumRed_Float

    41  */

    42 

    43 public class SumRed_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     float[] c = new float[256*1024];

    49     float[] d = new float[256*1024];

    50     sumReductionInit(a,b,c);

    51     float total = 0;

    52     float valid = (float)4.611686E18;

    53     for(int j = 0; j < 2000; 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     float[] a,

    67     float[] b,

    68     float[] 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 float sumReductionImplement(

    82     float[] a,

    83     float[] b,

    84     float[] c,

    85     float[] d,

    86     float 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 }