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annotate test/compiler/intrinsics/bmi/TestTzcntL.java @ 17778:a48e16541e6b

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8035857: Add tests to verify correctness of operations with BMI1 and LZCNT instructions Reviewed-by: iveresov, kvn, iignatyev Contributed-by: filipp.zhinkin@oracle.com
author iignatyev
date Sat, 22 Mar 2014 00:26:48 +0400
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17778
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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 TestTzcntL 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 TestTzcntL
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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 TestTzcntL {
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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(TzcntLExpr.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 TzcntLExpr extends Expr.BitCountingLongExpr {
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53
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54 public long longExpr(long src) {
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55 return Long.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 }