/*

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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

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

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 *

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

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/**

 * @test

 * @bug 8031321

 * @summary Verify processing of UseCountTrailingZerosInstruction option

 *          on CPU with TZCNT (BMI1 feature) support.

 * @library /testlibrary /test/lib

 * @modules java.base/sun.misc

 *          java.management

 * @build TestUseCountTrailingZerosInstructionOnSupportedCPU

 *        BMISupportedCPUTest

 * @run main ClassFileInstaller sun.hotspot.WhiteBox

 *                              sun.hotspot.WhiteBox$WhiteBoxPermission

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

 *                   -XX:+WhiteBoxAPI

 *                   TestUseCountTrailingZerosInstructionOnSupportedCPU

 */

import sun.hotspot.cpuinfo.CPUInfo;

import jdk.test.lib.*;

import jdk.test.lib.cli.*;

public class TestUseCountTrailingZerosInstructionOnSupportedCPU

        extends BMISupportedCPUTest {

    private static final String DISABLE_BMI = "-XX:-UseBMI1Instructions";

    public TestUseCountTrailingZerosInstructionOnSupportedCPU() {

        super("UseCountTrailingZerosInstruction", TZCNT_WARNING, "bmi1");

    }

    @Override

    public void runTestCases() throws Throwable {

        super.runTestCases();

        /*

          Verify that option will be disabled if all BMI1 instructions

          are explicitly disabled. VM will be launched with following options:

          -XX:-UseBMI1Instructions -version

        */

        CommandLineOptionTest.verifyOptionValueForSameVM(optionName, "false",

                "Option 'UseCountTrailingZerosInstruction' should have "

                    + "'false' value if all BMI1 instructions are explicitly"

                    + " disabled (-XX:-UseBMI1Instructions flag used)",

                TestUseCountTrailingZerosInstructionOnSupportedCPU.DISABLE_BMI);

        /*

          Verify that option could be turned on even if other BMI1

          instructions were turned off. VM will be launched with following

          options: -XX:-UseBMI1Instructions

          -XX:+UseCountTrailingZerosInstruction -version

        */

        CommandLineOptionTest.verifyOptionValueForSameVM(optionName, "true",

                "Option 'UseCountTrailingZerosInstruction' should be able to "

                    + "be turned on even if all BMI1 instructions are "

                    + "disabled (-XX:-UseBMI1Instructions flag used)",

                TestUseCountTrailingZerosInstructionOnSupportedCPU.DISABLE_BMI,

                CommandLineOptionTest.prepareBooleanFlag(optionName, true));

    }

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

        new TestUseCountTrailingZerosInstructionOnSupportedCPU().test();

    }

}