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

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 *

 * 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.

 *

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/**

 * @test

 * @bug 8074981

 * @summary Add C2 x86 Superword support for scalar product reduction optimizations : float test

 * @requires os.arch=="x86" | os.arch=="i386" | os.arch=="amd64" | os.arch=="x86_64" | os.arch=="aarch64"

 *

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

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

 *

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

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

 *

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

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

 *

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

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

 */

public class ProdRed_Double

{

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

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

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

    prodReductionInit(a,b);

    double valid = 2000;

    double total = 0;

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

      total = j + 1;

      total = prodReductionImplement(a,b, 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 prodReductionInit(double[] a, double[] b)

  {

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

    {

      a[i] = i + 2;

      b[i] = i + 1;

    }

  }

  public static double prodReductionImplement(double[] a, double[] b, double total)

  {

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

    {

      total *= a[i] - b[i];

    }

    return total;

  }

}