1 /*
   2  * Copyright (c) 2008, 2009, 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.
   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 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