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 GNU CC. 7 8 GNU CC 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 GNU CC 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 GNU CC; 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 } 35