hotspot/test/compiler/arguments/TestUseCountTrailingZerosInstructionOnSupportedCPU.java
author mgerdin
Mon, 11 Aug 2014 17:12:41 +0400
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parent 24674 dbf660a72081
child 28190 5a6b07edeb21
permissions -rw-r--r--
8011397: JTREG needs to copy additional WhiteBox class file to JTwork/scratch/sun/hotspot Reviewed-by: kvn, iignatyev, mgerdin Contributed-by: andrey.x.zakharov@oracle.com
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/*
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 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 */
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/**
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 * @test
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 * @bug 8031321
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 * @summary Verify processing of UseCountTrailingZerosInstruction option
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 *          on CPU with TZCNT (BMI1 feature) support.
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 * @library /testlibrary /testlibrary/whitebox
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 * @build TestUseCountTrailingZerosInstructionOnSupportedCPU
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 *        BMISupportedCPUTest
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 * @run main ClassFileInstaller sun.hotspot.WhiteBox
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 *                              sun.hotspot.WhiteBox$WhiteBoxPermission
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 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
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 *                   -XX:+WhiteBoxAPI
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 *                   TestUseCountTrailingZerosInstructionOnSupportedCPU
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 */
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import sun.hotspot.cpuinfo.CPUInfo;
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import com.oracle.java.testlibrary.*;
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import com.oracle.java.testlibrary.cli.*;
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public class TestUseCountTrailingZerosInstructionOnSupportedCPU
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        extends BMISupportedCPUTest {
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    private static final String DISABLE_BMI = "-XX:-UseBMI1Instructions";
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    public TestUseCountTrailingZerosInstructionOnSupportedCPU() {
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        super("UseCountTrailingZerosInstruction", TZCNT_WARNING, "bmi1");
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    }
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    @Override
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    public void runTestCases() throws Throwable {
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        super.runTestCases();
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        /*
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          Verify that option will be disabled if all BMI1 instructions
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          are explicitly disabled. VM will be launched with following options:
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          -XX:-UseBMI1Instructions -version
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        */
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        CommandLineOptionTest.verifyOptionValueForSameVM(optionName, "false",
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                TestUseCountTrailingZerosInstructionOnSupportedCPU.DISABLE_BMI);
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        /*
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          Verify that option could be turned on even if other BMI1
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          instructions were turned off. VM will be launched with following
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          options: -XX:-UseBMI1Instructions
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          -XX:+UseCountTrailingZerosInstruction -version
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        */
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        CommandLineOptionTest.verifyOptionValueForSameVM(optionName, "true",
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                TestUseCountTrailingZerosInstructionOnSupportedCPU.DISABLE_BMI,
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                CommandLineOptionTest.prepareBooleanFlag(optionName, true));
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    }
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    public static void main(String args[]) throws Throwable {
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        new TestUseCountTrailingZerosInstructionOnSupportedCPU().test();
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    }
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}
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