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3743
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1 /*
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2 * Copyright (c) 2011, 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 6956668
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28 * @summary misbehavior of XOR operator (^) with int
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29 *
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30 * @run main/othervm -Xbatch Test6956668
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31 */
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32
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33
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34 public class Test6956668 {
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35
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36 public static int bitTest() {
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37 int result = 0;
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38
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39 int testValue = 73;
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40 int bitCount = Integer.bitCount(testValue);
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41
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42 if (testValue != 0) {
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43 int gap = Long.numberOfTrailingZeros(testValue);
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44 testValue >>>= gap;
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45
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46 while (testValue != 0) {
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47 result++;
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48
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49 if ((testValue ^= 0x1) != 0) {
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50 gap = Long.numberOfTrailingZeros(testValue);
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51 testValue >>>= gap;
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52 }
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53 }
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54 }
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55
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56 if (bitCount != result) {
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57 System.out.println("ERROR: " + bitCount + " != " + result);
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58 System.exit(97);
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59 }
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60
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61 return (result);
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62 }
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63
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64 public static void main(String[] args) {
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65 for (int i = 0; i < 100000; i++) {
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66 int ct = bitTest();
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67 }
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68 }
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69 }
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