1 /*

     2  * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.

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

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

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

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 

    24 /**

    25  * @test

    26  * @bug 8031321

    27  * @summary Verify processing of UseCountTrailingZerosInstruction option

    28  *          on CPU with TZCNT (BMI1 feature) support.

    29  * @library /testlibrary /testlibrary/whitebox

    30  * @build TestUseCountTrailingZerosInstructionOnSupportedCPU

    31  *        BMISupportedCPUTest

    32  * @run main ClassFileInstaller sun.hotspot.WhiteBox

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

    34  *                   -XX:+WhiteBoxAPI

    35  *                   TestUseCountTrailingZerosInstructionOnSupportedCPU

    36  */

    37 

    38 import sun.hotspot.cpuinfo.CPUInfo;

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

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

    41 

    42 public class TestUseCountTrailingZerosInstructionOnSupportedCPU

    43      extends BMISupportedCPUTest {

    44 

    45     public TestUseCountTrailingZerosInstructionOnSupportedCPU() {

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

    47     }

    48 

    49     @Override

    50     public void runTestCases() throws Throwable {

    51 

    52         super.runTestCases();

    53 

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

    55         // are explicitly disabled

    56         CommandLineOptionTest.

    57             verifyOptionValue("UseCountTrailingZerosInstruction", "false",

    58                               "-XX:-UseBMI1Instructions");

    59 

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

    61         // instructions were turned off

    62         CommandLineOptionTest.

    63             verifyOptionValue("UseCountTrailingZerosInstruction", "true",

    64                               "-XX:-UseBMI1Instructions",

    65                               "-XX:+UseCountTrailingZerosInstruction");

    66     }

    67 

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

    69         new TestUseCountTrailingZerosInstructionOnSupportedCPU().test();

    70     }

    71 }

    72