1 /* 2 * Copyright (c) 2014, 2015, 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. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 /* 27 * @test 28 * @modules java.base/jdk.internal.misc 29 * @library /testlibrary 30 * @run main/othervm -Xbatch -XX:+IgnoreUnrecognizedVMOptions -XX:+EliminateAutoBox 31 * -XX:CompileOnly=::valueOf,::byteValue,::shortValue,::testUnsignedByte,::testUnsignedShort 32 * UnsignedLoads 33 */ 34 import static jdk.test.lib.Asserts.assertEQ; 35 36 public class UnsignedLoads { 37 public static int testUnsignedByte() { 38 byte[] bytes = new byte[] {-1}; 39 int res = 0; 40 for (int i = 0; i < 100000; i++) { 41 for (Byte b : bytes) { 42 res = b & 0xff; 43 } 44 } 45 return res; 46 } 47 48 public static int testUnsignedShort() { 49 int res = 0; 50 short[] shorts = new short[] {-1}; 51 for (int i = 0; i < 100000; i++) { 52 for (Short s : shorts) { 53 res = s & 0xffff; 54 } 55 } 56 return res; 57 } 58 59 public static void main(String[] args) { 60 assertEQ(testUnsignedByte(), 255); 61 assertEQ(testUnsignedShort(), 65535); 62 System.out.println("TEST PASSED"); 63 } 64 }