root/maint/gnulib/tests/test-log2-ieee.h

/* */

INCLUDED FROM

DEFINITIONS

1. test_function

   1 /* Test of log2*() 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   /* [MX] shaded specification in POSIX.  */
  21 
  22   /* Negative arguments.  */
  23   ASSERT (ISNAN (LOG2 (- L_(0.00001))));
  24   ASSERT (ISNAN (LOG2 (- L_(1.0))));
  25   ASSERT (ISNAN (LOG2 (- L_(1000000.0))));
  26   ASSERT (ISNAN (LOG2 (- INFINITY)));
  27 
  28   /* NaN.  */
  29   ASSERT (ISNAN (LOG2 (NAN)));
  30 
  31   /* Only rational value.  */
  32   {
  33     DOUBLE z = LOG2 (L_(1.0));
  34     ASSERT (z == L_(0.0));
  35     ASSERT (!signbit (z));
  36   }
  37 
  38   /* Infinity.  */
  39   ASSERT (LOG2 (INFINITY) == INFINITY);
  40 }

/* */