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 /../../test/lib
  30  * @build TestUseCountTrailingZerosInstructionOnSupportedCPU
  31  *        BMISupportedCPUTest
  32  * @run main ClassFileInstaller sun.hotspot.WhiteBox
  33  *                              sun.hotspot.WhiteBox$WhiteBoxPermission
  34  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
  35  *                   -XX:+WhiteBoxAPI
  36  *                   TestUseCountTrailingZerosInstructionOnSupportedCPU
  37  */
  38 
  39 import sun.hotspot.cpuinfo.CPUInfo;
  40 import com.oracle.java.testlibrary.*;
  41 import com.oracle.java.testlibrary.cli.*;
  42 
  43 public class TestUseCountTrailingZerosInstructionOnSupportedCPU
  44         extends BMISupportedCPUTest {
  45     private static final String DISABLE_BMI = "-XX:-UseBMI1Instructions";
  46 
  47     public TestUseCountTrailingZerosInstructionOnSupportedCPU() {
  48         super("UseCountTrailingZerosInstruction", TZCNT_WARNING, "bmi1");
  49     }
  50 
  51     @Override
  52     public void runTestCases() throws Throwable {
  53 
  54         super.runTestCases();
  55 
  56         /*
  57           Verify that option will be disabled if all BMI1 instructions
  58           are explicitly disabled. VM will be launched with following options:
  59           -XX:-UseBMI1Instructions -version
  60         */
  61         CommandLineOptionTest.verifyOptionValueForSameVM(optionName, "false",
  62                 TestUseCountTrailingZerosInstructionOnSupportedCPU.DISABLE_BMI);
  63 
  64         /*
  65           Verify that option could be turned on even if other BMI1
  66           instructions were turned off. VM will be launched with following
  67           options: -XX:-UseBMI1Instructions
  68           -XX:+UseCountTrailingZerosInstruction -version
  69         */
  70         CommandLineOptionTest.verifyOptionValueForSameVM(optionName, "true",
  71                 TestUseCountTrailingZerosInstructionOnSupportedCPU.DISABLE_BMI,
  72                 CommandLineOptionTest.prepareBooleanFlag(optionName, true));
  73     }
  74 
  75     public static void main(String args[]) throws Throwable {
  76         new TestUseCountTrailingZerosInstructionOnSupportedCPU().test();
  77     }
  78 }
  79