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

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 *

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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 /testlibrary/whitebox

 * @build TestUseCountTrailingZerosInstructionOnSupportedCPU

 *        BMISupportedCPUTest

 * @run main ClassFileInstaller sun.hotspot.WhiteBox

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

 *                   -XX:+WhiteBoxAPI

 *                   TestUseCountTrailingZerosInstructionOnSupportedCPU

 */

import sun.hotspot.cpuinfo.CPUInfo;

import com.oracle.java.testlibrary.*;

import com.oracle.java.testlibrary.cli.*;

public class TestUseCountTrailingZerosInstructionOnSupportedCPU

     extends BMISupportedCPUTest {

    public TestUseCountTrailingZerosInstructionOnSupportedCPU() {

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

    }

    @Override

    public void runTestCases() throws Throwable {

        super.runTestCases();

        // verify that option will be disabled if all BMI1 instuctions

        // are explicitly disabled

        CommandLineOptionTest.

            verifyOptionValue("UseCountTrailingZerosInstruction", "false",

                              "-XX:-UseBMI1Instructions");

        // verify that option could be turned on even if other BMI1

        // instructions were turned off

        CommandLineOptionTest.

            verifyOptionValue("UseCountTrailingZerosInstruction", "true",

                              "-XX:-UseBMI1Instructions",

                              "-XX:+UseCountTrailingZerosInstruction");

    }

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

        new TestUseCountTrailingZerosInstructionOnSupportedCPU().test();

    }

}