Mercurial > hg > truffle
comparison test/compiler/intrinsics/bmi/TestLzcntI.java @ 18041:52b4284cb496
Merge with jdk8u20-b26
author | Gilles Duboscq <duboscq@ssw.jku.at> |
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date | Wed, 15 Oct 2014 16:02:50 +0200 |
parents | a48e16541e6b |
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17606:45d7b2c7029d | 18041:52b4284cb496 |
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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 /** | |
26 * @test | |
27 * @bug 8031321 | |
28 * @summary Verify that results of computations are the same w/ | |
29 * and w/o usage of intrinsic | |
30 * @library /testlibrary /testlibrary/whitebox | |
31 * @build TestLzcntI BMITestRunner Expr | |
32 * @run main ClassFileInstaller sun.hotspot.WhiteBox | |
33 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions | |
34 * -XX:+WhiteBoxAPI TestLzcntI | |
35 */ | |
36 | |
37 import sun.hotspot.cpuinfo.CPUInfo; | |
38 | |
39 public class TestLzcntI { | |
40 | |
41 public static void main(String args[]) throws Throwable { | |
42 if (!CPUInfo.hasFeature("lzcnt")) { | |
43 System.out.println("CPU does not support lzcnt feature. " + | |
44 "Test skipped."); | |
45 return; | |
46 } | |
47 | |
48 BMITestRunner.runTests(LzcntIExpr.class, args, | |
49 "-XX:+UseCountLeadingZerosInstruction"); | |
50 } | |
51 | |
52 public static class LzcntIExpr extends Expr.BitCountingIntExpr { | |
53 | |
54 public int intExpr(int src) { | |
55 return Integer.numberOfLeadingZeros(src); | |
56 } | |
57 | |
58 } | |
59 | |
60 } |