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 /testlibrary/whitebox 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