1 /*

     2  * Copyright 2010 Google, Inc.  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 /*

    26  * @test

    27  * @bug 6946040

    28  * @summary Tests Character/Short.reverseBytes and their intrinsics implementation in the server compiler

    29  *

    30  * @run main/othervm -Xbatch

    31  *      -XX:CompileCommand=compileonly,compiler.c2.TestCharShortByteSwap::testChar

    32  *      -XX:CompileCommand=compileonly,compiler.c2.TestCharShortByteSwap::testShort

    33  *      compiler.c2.TestCharShortByteSwap

    34  */

    35 

    36 package compiler.c2;

    37 

    38 // This test must run without any command line arguments.

    39 

    40 public class TestCharShortByteSwap {

    41 

    42   private static short initShort(String[] args, short v) {

    43     if (args.length > 0) {

    44       try {

    45         return (short) Integer.valueOf(args[0]).intValue();

    46       } catch (NumberFormatException e) { }

    47     }

    48     return v;

    49   }

    50 

    51   private static char initChar(String[] args, char v) {

    52     if (args.length > 0) {

    53       try {

    54         return (char) Integer.valueOf(args[0]).intValue();

    55       } catch (NumberFormatException e) { }

    56     }

    57     return v;

    58   }

    59 

    60   private static void testChar(char a, char b) {

    61     if (a != Character.reverseBytes(b)) {

    62       throw new RuntimeException("FAIL: " + (int)a + " != Character.reverseBytes(" + (int)b + ")");

    63     }

    64     if (b != Character.reverseBytes(a)) {

    65       throw new RuntimeException("FAIL: " + (int)b + " != Character.reverseBytes(" + (int)a + ")");

    66     }

    67   }

    68 

    69   private static void testShort(short a, short b) {

    70     if (a != Short.reverseBytes(b)) {

    71       throw new RuntimeException("FAIL: " + (int)a + " != Short.reverseBytes(" + (int)b + ")");

    72     }

    73     if (b != Short.reverseBytes(a)) {

    74       throw new RuntimeException("FAIL: " + (int)b + " != Short.reverseBytes(" + (int)a + ")");

    75     }

    76   }

    77 

    78   public static void main(String[] args) {

    79     for (int i = 0; i < 100000; ++i) { // Trigger compilation

    80       char c1 = initChar(args, (char) 0x0123);

    81       char c2 = initChar(args, (char) 0x2301);

    82       char c3 = initChar(args, (char) 0xaabb);

    83       char c4 = initChar(args, (char) 0xbbaa);

    84       short s1 = initShort(args, (short) 0x0123);

    85       short s2 = initShort(args, (short) 0x2301);

    86       short s3 = initShort(args, (short) 0xaabb);

    87       short s4 = initShort(args, (short) 0xbbaa);

    88       testChar(c1, c2);

    89       testChar(c3, c4);

    90       testShort(s1, s2);

    91       testShort(s3, s4);

    92     }

    93   }

    94 }