1 /*
   2  * Copyright (c) 2014, 2015, 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  * @modules java.base/jdk.internal.misc
  31  *          java.management
  32  *
  33  * @build compiler.arguments.TestUseCountTrailingZerosInstructionOnSupportedCPU
  34  * @run driver ClassFileInstaller sun.hotspot.WhiteBox
  35  *                                sun.hotspot.WhiteBox$WhiteBoxPermission
  36  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
  37  *                   -XX:+WhiteBoxAPI
  38  *                   compiler.arguments.TestUseCountTrailingZerosInstructionOnSupportedCPU
  39  */
  40 
  41 package compiler.arguments;
  42 
  43 import jdk.test.lib.cli.CommandLineOptionTest;
  44 
  45 public class TestUseCountTrailingZerosInstructionOnSupportedCPU
  46         extends BMISupportedCPUTest {
  47     private static final String DISABLE_BMI = "-XX:-UseBMI1Instructions";
  48 
  49     public TestUseCountTrailingZerosInstructionOnSupportedCPU() {
  50         super("UseCountTrailingZerosInstruction", TZCNT_WARNING, "bmi1");
  51     }
  52 
  53     @Override
  54     public void runTestCases() throws Throwable {
  55 
  56         super.runTestCases();
  57 
  58         /*
  59           Verify that option will be disabled if all BMI1 instructions
  60           are explicitly disabled. VM will be launched with following options:
  61           -XX:-UseBMI1Instructions -version
  62         */
  63         CommandLineOptionTest.verifyOptionValueForSameVM(optionName, "false",
  64                 "Option 'UseCountTrailingZerosInstruction' should have "
  65                     + "'false' value if all BMI1 instructions are explicitly"
  66                     + " disabled (-XX:-UseBMI1Instructions flag used)",
  67                 TestUseCountTrailingZerosInstructionOnSupportedCPU.DISABLE_BMI);
  68 
  69         /*
  70           Verify that option could be turned on even if other BMI1
  71           instructions were turned off. VM will be launched with following
  72           options: -XX:-UseBMI1Instructions
  73           -XX:+UseCountTrailingZerosInstruction -version
  74         */
  75         CommandLineOptionTest.verifyOptionValueForSameVM(optionName, "true",
  76                 "Option 'UseCountTrailingZerosInstruction' should be able to "
  77                     + "be turned on even if all BMI1 instructions are "
  78                     + "disabled (-XX:-UseBMI1Instructions flag used)",
  79                 TestUseCountTrailingZerosInstructionOnSupportedCPU.DISABLE_BMI,
  80                 CommandLineOptionTest.prepareBooleanFlag(optionName, true));
  81     }
  82 
  83     public static void main(String args[]) throws Throwable {
  84         new TestUseCountTrailingZerosInstructionOnSupportedCPU().test();
  85     }
  86 }
  87