tests/test-rint-ieee.h

   1 /* Test of rint*() function family.
   2    Copyright (C) 2012-2024 Free Software Foundation, Inc.
   3
   4    This program is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation, either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  16
  17 static void
  18 test_function (void)
  19 {
  20   /* [MX] shaded specification in POSIX.  */
  21
  22   /* NaN.  */
  23   ASSERT (ISNAN (RINT (NAN)));
  24
  25   /* Signed zero.  */
  26   {
  27     DOUBLE y = RINT (L_(0.0));
  28     ASSERT (y == L_(0.0));
  29     ASSERT (!signbit (y));
  30   }
  31   {
  32     DOUBLE y = RINT (MINUS_ZERO);
  33     ASSERT (y == L_(0.0));
  34     ASSERT (!!signbit (y) == !!signbit (MINUS_ZERO));
  35   }
  36
  37   /* Infinity.  */
  38   ASSERT (RINT (INFINITY) == INFINITY);
  39   ASSERT (RINT (- INFINITY) == - INFINITY);
  40 }