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:+IgnoreUnrecognizedVMOptions -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 }