/*

 * 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

 * @bug 8031321

 * @summary Verify that results of computations are the same w/

 *          and w/o usage of intrinsic

 * @library /testlibrary /testlibrary/whitebox

 * @build TestLzcntI BMITestRunner Expr

 * @run main ClassFileInstaller sun.hotspot.WhiteBox

 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions

 *                   -XX:+WhiteBoxAPI TestLzcntI

 */

import sun.hotspot.cpuinfo.CPUInfo;

public class TestLzcntI {

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

        if (!CPUInfo.hasFeature("lzcnt")) {

            System.out.println("CPU does not support lzcnt feature. " +

                               "Test skipped.");

            return;

        }

        BMITestRunner.runTests(LzcntIExpr.class, args,

                               "-XX:+UseCountLeadingZerosInstruction");

    }

    public static class LzcntIExpr extends Expr.BitCountingIntExpr {

        public int intExpr(int src) {

            return Integer.numberOfLeadingZeros(src);

        }

    }

}