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 : float 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_Float

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

    33  *

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

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

    36  *

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

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

    39  *

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

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

    42  */

    43 

    44 public class SumRedAbsNeg_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 

    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     float[] a,

    70     float[] b,

    71     float[] 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 float sumReductionImplement(

    85     float[] a,

    86     float[] b,

    87     float[] c,

    88     float[] d,

    89     float 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 }