Mercurial > hg > truffle
diff test/compiler/intrinsics/bmi/TestLzcntL.java @ 18058:54bc75c144b0
Merge
author | asaha |
---|---|
date | Thu, 29 May 2014 13:14:25 -0700 |
parents | a48e16541e6b |
children |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/test/compiler/intrinsics/bmi/TestLzcntL.java Thu May 29 13:14:25 2014 -0700 @@ -0,0 +1,60 @@ +/* + * Copyright (c) 2014, 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 + * @bug 8031321 + * @summary Verify that results of computations are the same w/ + * and w/o usage of intrinsic + * @library /testlibrary /testlibrary/whitebox + * @build TestLzcntL BMITestRunner Expr + * @run main ClassFileInstaller sun.hotspot.WhiteBox + * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions + * -XX:+WhiteBoxAPI TestLzcntL + */ + +import sun.hotspot.cpuinfo.CPUInfo; + +public class TestLzcntL { + + public static void main(String args[]) throws Throwable { + if (!CPUInfo.hasFeature("lzcnt")) { + System.out.println("CPU does not support lzcnt feature. " + + "Test skipped."); + return; + } + + BMITestRunner.runTests(LzcntLExpr.class, args, + "-XX:+UseCountLeadingZerosInstruction"); + } + + public static class LzcntLExpr extends Expr.BitCountingLongExpr { + + public long longExpr(long src) { + return Long.numberOfLeadingZeros(src); + } + + } + +}