Mercurial > hg > graal-compiler
view test/compiler/intrinsics/bmi/TestLzcntL.java @ 20505:8ba0078861d4
8047976: Ergonomics for GC thread counts should update the flags
Summary: Ergonomics updates flags for number of GC threads
Reviewed-by: tschatzl, jwilhelm
Contributed-by: sangheon.kim@oracle.com
author | jwilhelm |
---|---|
date | Sat, 27 Sep 2014 15:11:41 +0200 |
parents | a48e16541e6b |
children |
line wrap: on
line source
/* * 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); } } }