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/*
* Copyright (c) 2014, 2022, 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
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/**
* @test
* @bug 8031321
* @summary Verify processing of UseCountTrailingZerosInstruction option
* on CPU with TZCNT (BMI1 feature) support.
* @library /test/lib /
* @requires vm.flagless
* @modules java.base/jdk.internal.misc
* java.management
*
* @build jdk.test.whitebox.WhiteBox
* @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
* -XX:+WhiteBoxAPI
* compiler.arguments.TestUseCountTrailingZerosInstructionOnSupportedCPU
*/
package compiler.arguments;
import jdk.test.lib.cli.CommandLineOptionTest;
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();
}
}
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