1 /* 2 * Copyright (c) 2012, 2013, 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 * @test 26 * @bug 8000805 27 * @summary JMM issue: short loads are non-atomic 28 * 29 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-TieredCompilation -Xcomp -XX:+PrintCompilation -XX:CompileOnly=Test8000805.loadS2LmaskFF,Test8000805.loadS2Lmask16,Test8000805.loadS2Lmask13,Test8000805.loadUS_signExt,Test8000805.loadB2L_mask8 Test8000805 30 */ 31 32 public class Test8000805 { 33 static long loadS2LmaskFF (short[] sa) { return sa[0] & 0xFF; } 34 static long loadS2LmaskFF_1 (short[] sa) { return sa[0] & 0xFF; } 35 36 static long loadS2Lmask16 (short[] sa) { return sa[0] & 0xFFFE; } 37 static long loadS2Lmask16_1 (short[] sa) { return sa[0] & 0xFFFE; } 38 39 static long loadS2Lmask13 (short[] sa) { return sa[0] & 0x0FFF; } 40 static long loadS2Lmask13_1 (short[] sa) { return sa[0] & 0x0FFF; } 41 42 static int loadUS_signExt (char[] ca) { return (ca[0] << 16) >> 16; } 43 static int loadUS_signExt_1 (char[] ca) { return (ca[0] << 16) >> 16; } 44 45 static long loadB2L_mask8 (byte[] ba) { return ba[0] & 0x55; } 46 static long loadB2L_mask8_1 (byte[] ba) { return ba[0] & 0x55; } 47 48 public static void main(String[] args) { 49 for (int i = Byte.MIN_VALUE; i < Byte.MAX_VALUE; i++) { 50 byte[] ba = new byte[] { (byte) i}; 51 52 { long v1 = loadB2L_mask8(ba); 53 long v2 = loadB2L_mask8_1(ba); 54 if (v1 != v2) 55 throw new InternalError(String.format("loadB2L_mask8 failed: %x != %x", v1, v2)); } 56 } 57 58 for (int i = Short.MIN_VALUE; i < Short.MAX_VALUE; i++) { 59 short[] sa = new short[] { (short)i }; 60 char[] ca = new char[] { (char)i }; 61 62 { long v1 = loadS2LmaskFF(sa); 63 long v2 = loadS2LmaskFF_1(sa); 64 if (v1 != v2) 65 throw new InternalError(String.format("loadS2LmaskFF failed: %x != %x", v1, v2)); } 66 67 { long v1 = loadS2Lmask16(sa); 68 long v2 = loadS2Lmask16_1(sa); 69 if (v1 != v2) 70 throw new InternalError(String.format("loadS2Lmask16 failed: %x != %x", v1, v2)); } 71 72 { long v1 = loadS2Lmask13(sa); 73 long v2 = loadS2Lmask13_1(sa); 74 if (v1 != v2) 75 throw new InternalError(String.format("loadS2Lmask13 failed: %x != %x", v1, v2)); } 76 77 { int v1 = loadUS_signExt(ca); 78 int v2 = loadUS_signExt_1(ca); 79 if (v1 != v2) 80 throw new InternalError(String.format("loadUS_signExt failed: %x != %x", v1, v2)); } 81 } 82 83 System.out.println("TEST PASSED."); 84 } 85 }