1/*
2 * Copyright (c) 2014, 2016, 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 /test/lib /
30 * @modules java.base/jdk.internal.misc
31 *          java.management
32 *
33 * @build sun.hotspot.WhiteBox
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
41package compiler.arguments;
42
43import jdk.test.lib.cli.CommandLineOptionTest;
44
45public 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
88