test/compiler/6778657/Test.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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/*
 * @test
 * @bug 6778657
 * @summary Casts in SharedRuntime::f2i, f2l, d2i and d2l rely on undefined C++ behaviour
 */

public class Test {
  public static void check_f2i(int expect) {
    float check = expect;
    check *= 2;
    int actual = (int) check;
    if (actual != expect)
      throw new RuntimeException("expecting " + expect + ", got " + actual);
  }

  public static void check_f2l(long expect) {
    float check = expect;
    check *= 2;
    long actual = (long) check;
    if (actual != expect)
      throw new RuntimeException("expecting " + expect + ", got " + actual);
  }

  public static void check_d2i(int expect) {
    double check = expect;
    check *= 2;
    int actual = (int) check;
    if (actual != expect)
      throw new RuntimeException("expecting " + expect + ", got " + actual);
  }

  public static void check_d2l(long expect) {
    double check = expect;
    check *= 2;
    long actual = (long) check;
    if (actual != expect)
      throw new RuntimeException("expecting " + expect + ", got " + actual);
  }

  public static void main(String[] args) {
    check_f2i(Integer.MAX_VALUE);
    check_f2i(Integer.MIN_VALUE);
    check_f2l(Long.MAX_VALUE);
    check_f2l(Long.MIN_VALUE);
    check_d2i(Integer.MAX_VALUE);
    check_d2i(Integer.MIN_VALUE);
    check_d2l(Long.MAX_VALUE);
    check_d2l(Long.MIN_VALUE);
  }
}