6891
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1 /*
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2 * Copyright (c) 2012, 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 * @test
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26 * @bug 8000805
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27 * @summary JMM issue: short loads are non-atomic
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28 *
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29 * @run main/othervm -server -XX:-TieredCompilation -Xcomp -XX:+PrintCompilation -XX:CompileOnly=Test8000805.loadS2LmaskFF,Test8000805.loadS2Lmask16,Test8000805.loadS2Lmask13,Test8000805.loadUS_signExt,Test8000805.loadB2L_mask8 Test8000805
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30 */
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31
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32 public class Test8000805 {
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33 static long loadS2LmaskFF (short[] sa) { return sa[0] & 0xFF; }
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34 static long loadS2LmaskFF_1 (short[] sa) { return sa[0] & 0xFF; }
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35
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36 static long loadS2Lmask16 (short[] sa) { return sa[0] & 0xFFFE; }
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37 static long loadS2Lmask16_1 (short[] sa) { return sa[0] & 0xFFFE; }
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38
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39 static long loadS2Lmask13 (short[] sa) { return sa[0] & 0x0FFF; }
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40 static long loadS2Lmask13_1 (short[] sa) { return sa[0] & 0x0FFF; }
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41
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42 static int loadUS_signExt (char[] ca) { return (ca[0] << 16) >> 16; }
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43 static int loadUS_signExt_1 (char[] ca) { return (ca[0] << 16) >> 16; }
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44
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45 static long loadB2L_mask8 (byte[] ba) { return ba[0] & 0x55; }
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46 static long loadB2L_mask8_1 (byte[] ba) { return ba[0] & 0x55; }
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47
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48 public static void main(String[] args) {
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49 for (int i = Byte.MIN_VALUE; i < Byte.MAX_VALUE; i++) {
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50 byte[] ba = new byte[] { (byte) i};
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51
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52 { long v1 = loadB2L_mask8(ba);
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53 long v2 = loadB2L_mask8_1(ba);
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54 if (v1 != v2)
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55 throw new InternalError(String.format("loadB2L_mask8 failed: %x != %x", v1, v2)); }
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56 }
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57
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58 for (int i = Short.MIN_VALUE; i < Short.MAX_VALUE; i++) {
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59 short[] sa = new short[] { (short)i };
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60 char[] ca = new char[] { (char)i };
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61
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62 { long v1 = loadS2LmaskFF(sa);
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63 long v2 = loadS2LmaskFF_1(sa);
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64 if (v1 != v2)
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65 throw new InternalError(String.format("loadS2LmaskFF failed: %x != %x", v1, v2)); }
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66
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67 { long v1 = loadS2Lmask16(sa);
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68 long v2 = loadS2Lmask16_1(sa);
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69 if (v1 != v2)
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70 throw new InternalError(String.format("loadS2Lmask16 failed: %x != %x", v1, v2)); }
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71
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72 { long v1 = loadS2Lmask13(sa);
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73 long v2 = loadS2Lmask13_1(sa);
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74 if (v1 != v2)
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75 throw new InternalError(String.format("loadS2Lmask13 failed: %x != %x", v1, v2)); }
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76
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77 { int v1 = loadUS_signExt(ca);
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78 int v2 = loadUS_signExt_1(ca);
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79 if (v1 != v2)
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80 throw new InternalError(String.format("loadUS_signExt failed: %x != %x", v1, v2)); }
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81 }
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82
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83 System.out.println("TEST PASSED.");
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84 }
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85 }
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