1 /* 2 * Copyright (c) 2014, 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 * @library /testlibrary 29 * @run main/othervm -Xbatch -XX:+EliminateAutoBox 30 * -XX:CompileOnly=::valueOf,::byteValue,::shortValue,::testUnsignedByte,::testUnsignedShort 31 * UnsignedLoads 32 */ 33 import static com.oracle.java.testlibrary.Asserts.assertEQ; 34 35 public class UnsignedLoads { 36 public static int testUnsignedByte() { 37 byte[] bytes = new byte[] {-1}; 38 int res = 0; 39 for (int i = 0; i < 100000; i++) { 40 for (Byte b : bytes) { 41 res = b & 0xff; 42 } 43 } 44 return res; 45 } 46 47 public static int testUnsignedShort() { 48 int res = 0; 49 short[] shorts = new short[] {-1}; 50 for (int i = 0; i < 100000; i++) { 51 for (Short s : shorts) { 52 res = s & 0xffff; 53 } 54 } 55 return res; 56 } 57 58 public static void main(String[] args) { 59 assertEQ(testUnsignedByte(), 255); 60 assertEQ(testUnsignedShort(), 65535); 61 System.out.println("TEST PASSED"); 62 } 63 }