root/maint/gnulib/tests/test-fabs.h

/* */

INCLUDED FROM

DEFINITIONS

1. test_function

   1 /* Test of fabs*() function family.
   2    Copyright (C) 2012-2021 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   volatile DOUBLE x;
  21   DOUBLE y;
  22 
  23   /* Signed zero.  */
  24   x = L_(0.0);
  25   y = FABS (x);
  26   ASSERT (y == L_(0.0));
  27   ASSERT (!signbit (y));
  28 
  29   x = MINUS_ZERO;
  30   y = FABS (x);
  31   ASSERT (y == L_(0.0));
  32   ASSERT (!signbit (y));
  33 
  34   /* Randomized tests.  */
  35   {
  36     int i;
  37 
  38     for (i = 0; i < SIZEOF (RANDOM); i++)
  39       {
  40         x = L_(10.0) * RANDOM[i]; /* 0.0 <= x <= 10.0 */
  41         ASSERT (FABS (x) == x);
  42         ASSERT (FABS (- x) == x);
  43       }
  44   }
  45 }
  46 
  47 volatile DOUBLE x;
  48 DOUBLE y;

/* */