1 /*
  2  * Copyright (c) 2014, 2021, 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  * @test
 26  * @bug 8135028
 27  * @summary Add C2 x86 Superword support for scalar sum reduction optimizations : double sqrt test
 28  * @requires os.arch=="x86" | os.arch=="i386" | os.arch=="amd64" | os.arch=="x86_64" | os.arch=="aarch64" | os.arch=="riscv64"
 29  *
 30  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:LoopUnrollLimit=250
 31  *      -XX:CompileThresholdScaling=0.1
 32  *      -XX:+SuperWordReductions
 33  *      -XX:LoopMaxUnroll=2
 34  *      compiler.loopopts.superword.SumRedSqrt_Double
 35  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:LoopUnrollLimit=250
 36  *      -XX:CompileThresholdScaling=0.1
 37  *      -XX:-SuperWordReductions
 38  *      -XX:LoopMaxUnroll=2
 39  *      compiler.loopopts.superword.SumRedSqrt_Double
 40  *
 41  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:LoopUnrollLimit=250
 42  *      -XX:CompileThresholdScaling=0.1
 43  *      -XX:+SuperWordReductions
 44  *      -XX:LoopMaxUnroll=4
 45  *      compiler.loopopts.superword.SumRedSqrt_Double
 46  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:LoopUnrollLimit=250
 47  *      -XX:CompileThresholdScaling=0.1
 48  *      -XX:-SuperWordReductions
 49  *      -XX:LoopMaxUnroll=4
 50  *      compiler.loopopts.superword.SumRedSqrt_Double
 51  *
 52  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:LoopUnrollLimit=250
 53  *      -XX:CompileThresholdScaling=0.1
 54  *      -XX:+SuperWordReductions
 55  *      -XX:LoopMaxUnroll=8
 56  *      compiler.loopopts.superword.SumRedSqrt_Double
 57  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:LoopUnrollLimit=250
 58  *      -XX:CompileThresholdScaling=0.1
 59  *      -XX:-SuperWordReductions
 60  *      -XX:LoopMaxUnroll=8
 61  *      compiler.loopopts.superword.SumRedSqrt_Double
 62  *
 63  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:LoopUnrollLimit=250
 64  *      -XX:CompileThresholdScaling=0.1
 65  *      -XX:+SuperWordReductions
 66  *      -XX:LoopMaxUnroll=16
 67  *      compiler.loopopts.superword.SumRedSqrt_Double
 68  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:LoopUnrollLimit=250
 69  *      -XX:CompileThresholdScaling=0.1
 70  *      -XX:-SuperWordReductions
 71  *      -XX:LoopMaxUnroll=16
 72  *      compiler.loopopts.superword.SumRedSqrt_Double
 73  */
 74 
 75 
 76 package compiler.loopopts.superword;
 77 
 78 public class SumRedSqrt_Double {
 79     public static void main(String[] args) throws Exception {
 80         double[] a = new double[256 * 1024];
 81         double[] b = new double[256 * 1024];
 82         double[] c = new double[256 * 1024];
 83         double[] d = new double[256 * 1024];
 84         sumReductionInit(a, b, c);
 85         double total = 0;
 86         double valid = 2.06157643776E14;
 87         for (int j = 0; j < 2000; j++) {
 88             total = sumReductionImplement(a, b, c, d, total);
 89         }
 90         if (total == valid) {
 91             System.out.println("Success");
 92         } else {
 93             System.out.println("Invalid sum of elements variable in total: " + total);
 94             System.out.println("Expected value = " + valid);
 95             throw new Exception("Failed");
 96         }
 97     }
 98 
 99     public static void sumReductionInit(
100             double[] a,
101             double[] b,
102             double[] c) {
103         for (int j = 0; j < 1; j++) {
104             for (int i = 0; i < a.length; i++) {
105                 a[i] = i * 1 + j;
106                 b[i] = i * 1 - j;
107                 c[i] = i + j;
108             }
109         }
110     }
111 
112     public static double sumReductionImplement(
113             double[] a,
114             double[] b,
115             double[] c,
116             double[] d,
117             double total) {
118         for (int i = 0; i < a.length; i++) {
119             d[i] = Math.sqrt(a[i] * b[i]) + Math.sqrt(a[i] * c[i]) + Math.sqrt(b[i] * c[i]);
120             total += d[i];
121         }
122         return total;
123     }
124 
125 }