gcc/config/ns32k/__unorddf2.c

   1 /* Lightweight function to test for ieee unordered comparison
   2    Copyright (C) 2002
   3    Free Software Foundation, Inc.
   4    Contributed by Ian Dall <ian@beware.dropbear.id.au>
   5
   6 This file is part of GCC.
   7
   8 GCC is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 2, or (at your option)
  11 any later version.
  12
  13 GCC is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GCC; see the file COPYING.  If not, write to
  20 the Free Software Foundation, 59 Temple Place - Suite 330,
  21 Boston, MA 02111-1307, USA.  */
  22
  23 # define ISNAN(x) (                                                     \
  24   {                                                                     \
  25     union u { double d; unsigned int i[2]; } *t = (union u *)&(x);      \
  26     ((t->i[1] & 0x7ff00000) == 0x7ff00000) &&                           \
  27     (t->i[0] != 0 || (t->i[1] & 0xfffff) != 0);                         \
  28   })
  29
  30 int __unorddf2 (double, double);
  31 int __unorddf2 (double a, double b)
  32 {
  33   return ISNAN(a) || ISNAN(b);
  34 }