Mercurial > hg > truffle
annotate test/compiler/intrinsics/bmi/TestTzcntI.java @ 20888:0f3d81231ecb
Truffle/Instrumentation: Javadoc
author | Michael Van De Vanter <michael.van.de.vanter@oracle.com> |
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date | Fri, 10 Apr 2015 17:56:10 -0700 |
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1 /* |
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2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 * |
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23 */ |
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24 |
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25 /** |
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26 * @test |
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27 * @bug 8031321 |
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28 * @summary Verify that results of computations are the same w/ |
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29 * and w/o usage of intrinsic |
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30 * @library /testlibrary /testlibrary/whitebox |
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31 * @build TestTzcntI BMITestRunner Expr |
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32 * @run main ClassFileInstaller sun.hotspot.WhiteBox |
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33 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions |
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34 * -XX:+WhiteBoxAPI TestTzcntI |
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35 */ |
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36 |
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37 import sun.hotspot.cpuinfo.CPUInfo; |
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38 |
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39 public class TestTzcntI { |
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40 |
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41 public static void main(String args[]) throws Throwable { |
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42 if (!CPUInfo.hasFeature("bmi1")) { |
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43 System.out.println("CPU does not support bmi1 feature. " + |
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44 "Test skipped."); |
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45 return; |
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46 } |
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47 |
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48 BMITestRunner.runTests(TzcntIExpr.class, args, |
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49 "-XX:+UseCountTrailingZerosInstruction"); |
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50 } |
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51 |
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52 public static class TzcntIExpr extends Expr.BitCountingIntExpr { |
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53 |
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54 public int intExpr(int src) { |
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55 return Integer.numberOfTrailingZeros(src); |
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56 } |
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57 |
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58 } |
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59 |
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60 } |