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 * 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
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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
 * @summary Verify that results of intrinsic lzcnt computations are correct
 * @library /test/lib /
 * @modules java.base/jdk.internal.misc
 *          java.management
 *
 * @build sun.hotspot.WhiteBox
 * @run driver ClassFileInstaller sun.hotspot.WhiteBox
 *                                sun.hotspot.WhiteBox$WhiteBoxPermission
 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
 *                   -XX:+WhiteBoxAPI
 *                   -XX:+UseCountLeadingZerosInstruction
 *                   compiler.intrinsics.bmi.VerifyLzcntL
 */

package compiler.intrinsics.bmi;

import sun.hotspot.cpuinfo.CPUInfo;

public class VerifyLzcntL extends VerifyLzcntBase<Long>
{
    public VerifyLzcntL()
    {
        super();
        expMax = 64;
    }

    protected int getCount()
    {
        return Long.numberOfLeadingZeros(testValue);
    }

    protected void initValue()
    {
        testValue = 0L;
    }

    protected void nextValue()
    {
            if (testValue == 0L) {
                testValue = 1L;
            } else {
                testValue <<= 1;
            }
    }

    protected String valueToHexString()
    {
        return Long.toHexString(testValue);
    }

    public static void main(String[] args)
    {
        /*
         * Check for lzcnt feature on x86 platforms and vis3 on SPARC
         */
        if (!(CPUInfo.hasFeature("lzcnt") || CPUInfo.hasFeature("vis3"))) {
            System.out.println("INFO: CPU does not support lzcnt feature.");
        }

        VerifyLzcntL testL = new VerifyLzcntL();
        testL.runTest();
    }
}