/*
 * 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 TestLzcntL BMITestRunner Expr
 * @run main ClassFileInstaller sun.hotspot.WhiteBox
 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
 *                   -XX:+WhiteBoxAPI TestLzcntL
 */

import sun.hotspot.cpuinfo.CPUInfo;

public class TestLzcntL {

    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(LzcntLExpr.class, args,
                               "-XX:+UseCountLeadingZerosInstruction");
    }

    public static class LzcntLExpr extends Expr.BitCountingLongExpr {

        public long longExpr(long src) {
            return Long.numberOfLeadingZeros(src);
        }

    }

}
