| /* |
| * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /** |
| * @test |
| * @bug 8000805 |
| * @summary JMM issue: short loads are non-atomic |
| * |
| * @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 |
| */ |
| |
| public class Test8000805 { |
| static long loadS2LmaskFF (short[] sa) { return sa[0] & 0xFF; } |
| static long loadS2LmaskFF_1 (short[] sa) { return sa[0] & 0xFF; } |
| |
| static long loadS2Lmask16 (short[] sa) { return sa[0] & 0xFFFE; } |
| static long loadS2Lmask16_1 (short[] sa) { return sa[0] & 0xFFFE; } |
| |
| static long loadS2Lmask13 (short[] sa) { return sa[0] & 0x0FFF; } |
| static long loadS2Lmask13_1 (short[] sa) { return sa[0] & 0x0FFF; } |
| |
| static int loadUS_signExt (char[] ca) { return (ca[0] << 16) >> 16; } |
| static int loadUS_signExt_1 (char[] ca) { return (ca[0] << 16) >> 16; } |
| |
| static long loadB2L_mask8 (byte[] ba) { return ba[0] & 0x55; } |
| static long loadB2L_mask8_1 (byte[] ba) { return ba[0] & 0x55; } |
| |
| public static void main(String[] args) { |
| for (int i = Byte.MIN_VALUE; i < Byte.MAX_VALUE; i++) { |
| byte[] ba = new byte[] { (byte) i}; |
| |
| { long v1 = loadB2L_mask8(ba); |
| long v2 = loadB2L_mask8_1(ba); |
| if (v1 != v2) |
| throw new InternalError(String.format("loadB2L_mask8 failed: %x != %x", v1, v2)); } |
| } |
| |
| for (int i = Short.MIN_VALUE; i < Short.MAX_VALUE; i++) { |
| short[] sa = new short[] { (short)i }; |
| char[] ca = new char[] { (char)i }; |
| |
| { long v1 = loadS2LmaskFF(sa); |
| long v2 = loadS2LmaskFF_1(sa); |
| if (v1 != v2) |
| throw new InternalError(String.format("loadS2LmaskFF failed: %x != %x", v1, v2)); } |
| |
| { long v1 = loadS2Lmask16(sa); |
| long v2 = loadS2Lmask16_1(sa); |
| if (v1 != v2) |
| throw new InternalError(String.format("loadS2Lmask16 failed: %x != %x", v1, v2)); } |
| |
| { long v1 = loadS2Lmask13(sa); |
| long v2 = loadS2Lmask13_1(sa); |
| if (v1 != v2) |
| throw new InternalError(String.format("loadS2Lmask13 failed: %x != %x", v1, v2)); } |
| |
| { int v1 = loadUS_signExt(ca); |
| int v2 = loadUS_signExt_1(ca); |
| if (v1 != v2) |
| throw new InternalError(String.format("loadUS_signExt failed: %x != %x", v1, v2)); } |
| } |
| |
| System.out.println("TEST PASSED."); |
| } |
| } |