1 /*

     2  * Copyright 2008 Sun Microsystems, 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any questions.

    22  *

    23  */

    24 

    25 /*

    26  * @test

    27  * @bug 6778657

    28  * @summary Casts in SharedRuntime::f2i, f2l, d2i and d2l rely on undefined C++ behaviour

    29  */

    30 

    31 public class Test {

    32   public static void check_f2i(int expect) {

    33     float check = expect;

    34     check *= 2;

    35     int actual = (int) check;

    36     if (actual != expect)

    37       throw new RuntimeException("expecting " + expect + ", got " + actual);

    38   }

    39 

    40   public static void check_f2l(long expect) {

    41     float check = expect;

    42     check *= 2;

    43     long actual = (long) check;

    44     if (actual != expect)

    45       throw new RuntimeException("expecting " + expect + ", got " + actual);

    46   }

    47 

    48   public static void check_d2i(int expect) {

    49     double check = expect;

    50     check *= 2;

    51     int actual = (int) check;

    52     if (actual != expect)

    53       throw new RuntimeException("expecting " + expect + ", got " + actual);

    54   }

    55 

    56   public static void check_d2l(long expect) {

    57     double check = expect;

    58     check *= 2;

    59     long actual = (long) check;

    60     if (actual != expect)

    61       throw new RuntimeException("expecting " + expect + ", got " + actual);

    62   }

    63 

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

    65     check_f2i(Integer.MAX_VALUE);

    66     check_f2i(Integer.MIN_VALUE);

    67     check_f2l(Long.MAX_VALUE);

    68     check_f2l(Long.MIN_VALUE);

    69     check_d2i(Integer.MAX_VALUE);

    70     check_d2i(Integer.MIN_VALUE);

    71     check_d2l(Long.MAX_VALUE);

    72     check_d2l(Long.MIN_VALUE);

    73   }

    74 }

    75