--- /dev/null 2016-12-01 16:34:58.000000000 +0000 +++ new/test/compiler/intrinsics/bmi/VerifyLzcntI.java 2016-12-01 16:34:58.192889016 +0000 @@ -0,0 +1,88 @@ +/* + * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +/** + * @test + * @summary Verify results of intrinsic Integer lzcnt computations are correct + * @library /test/lib / + * @modules java.base/jdk.internal.misc + * java.management + * + * @build sun.hotspot.WhiteBox + * @run driver ClassFileInstaller sun.hotspot.WhiteBox + * sun.hotspot.WhiteBox$WhiteBoxPermission + * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions + * -XX:+WhiteBoxAPI + * -XX:+UseCountLeadingZerosInstruction + * compiler.intrinsics.bmi.VerifyLzcntI + */ + +package compiler.intrinsics.bmi; + +import sun.hotspot.cpuinfo.CPUInfo; + +public class VerifyLzcntI extends VerifyLzcntBase +{ + public VerifyLzcntI() + { + super(); + expMax = 32; + } + + protected int getCount() + { + return Integer.numberOfLeadingZeros(testValue); + } + + protected void initValue() + { + testValue = 0; + } + + protected void nextValue() + { + if (testValue == 0) { + testValue = 1; + } else { + testValue <<= 1; + } + } + + protected String valueToHexString() + { + return Integer.toHexString(testValue); + } + + public static void main(String[] args) + { + /* + * Check for lzcnt feature on x86 platforms and vis3 on SPARC + */ + if (!(CPUInfo.hasFeature("lzcnt") || CPUInfo.hasFeature("vis3"))) { + System.out.println("INFO: CPU does not support lzcnt feature."); + } + + VerifyLzcntI testI = new VerifyLzcntI(); + testI.runTest(); + } +}