/*

 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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 */

/**

* @test

* @summary Add C2 x86 Superword support for scalar sum reduction optimizations : double sqrt test

*

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

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

*

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

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

*

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

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

*

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

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

*/

public class SumRedSqrt_Double

{

  public static void main(String[] args) throws Exception {

    double[] a = new double[256*1024];

    double[] b = new double[256*1024];

    double[] c = new double[256*1024];

    double[] d = new double[256*1024];

    sumReductionInit(a,b,c);

    double total = 0;

    double valid = 2.06157643776E14;

    for(int j = 0; j < 2000; j++) {

      total = sumReductionImplement(a,b,c,d,total);

    }

    if(total == valid) {

      System.out.println("Success");

    } else {

      System.out.println("Invalid sum of elements variable in total: " + total);

      System.out.println("Expected value = " + valid);

      throw new Exception("Failed");

    }

  }

  public static void sumReductionInit(

    double[] a,

    double[] b,

    double[] c)

  {

    for(int j = 0; j < 1; j++)

    {

      for(int i = 0; i < a.length; i++)

      {

        a[i] = i * 1 + j;

        b[i] = i * 1 - j;

        c[i] = i + j;

      }

    }

  }

  public static double sumReductionImplement(

    double[] a,

    double[] b,

    double[] c,

    double[] d,

    double total)

  {

    for(int i = 0; i < a.length; i++)

    {

      d[i]= Math.sqrt(a[i] * b[i]) + Math.sqrt(a[i] * c[i]) + Math.sqrt(b[i] * c[i]);

      total += d[i];

    }

    return total;

  }

}