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
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  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     private static final String DISABLE_BMI = "-XX:-UseBMI1Instructions";
  45 
  46     public TestUseCountTrailingZerosInstructionOnSupportedCPU() {
  47         super("UseCountTrailingZerosInstruction", TZCNT_WARNING, "bmi1");
  48     }
  49 
  50     @Override
  51     public void runTestCases() throws Throwable {
  52 
  53         super.runTestCases();
  54 
  55         // verify that option will be disabled if all BMI1 instructions
  56         // are explicitly disabled
  57         CommandLineOptionTest.verifyOptionValueForSameVM(optionName, "false",
  58                 TestUseCountTrailingZerosInstructionOnSupportedCPU.DISABLE_BMI);
  59 
  60         // verify that option could be turned on even if other BMI1
  61         // instructions were turned off
  62         CommandLineOptionTest.verifyOptionValueForSameVM(optionName, "true",
  63                 TestUseCountTrailingZerosInstructionOnSupportedCPU.DISABLE_BMI,
  64                 CommandLineOptionTest.prepareBooleanFlag(optionName, true));
  65     }
  66 
  67     public static void main(String args[]) throws Throwable {
  68         new TestUseCountTrailingZerosInstructionOnSupportedCPU().test();
  69     }
  70 }
  71