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