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377a515b | 1 | /* Return positive difference between arguments. |
6497a1d0 | 2 | Copyright (C) 1997, 2004 Free Software Foundation, Inc. |
377a515b UD |
3 | This file is part of the GNU C Library. |
4 | Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. | |
5 | ||
6 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
7 | modify it under the terms of the GNU Lesser General Public |
8 | License as published by the Free Software Foundation; either | |
9 | version 2.1 of the License, or (at your option) any later version. | |
377a515b UD |
10 | |
11 | The GNU C Library is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 14 | Lesser General Public License for more details. |
377a515b | 15 | |
41bdb6e2 AJ |
16 | You should have received a copy of the GNU Lesser General Public |
17 | License along with the GNU C Library; if not, write to the Free | |
18 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
19 | 02111-1307 USA. */ | |
377a515b UD |
20 | |
21 | #include <math.h> | |
22 | ||
23 | float | |
24 | __fdimf (float x, float y) | |
25 | { | |
26 | int clsx = fpclassify (x); | |
27 | int clsy = fpclassify (y); | |
28 | ||
29 | if (clsx == FP_NAN || clsy == FP_NAN | |
30 | || (y < 0 && clsx == FP_INFINITE && clsy == FP_INFINITE)) | |
31 | /* Raise invalid flag. */ | |
32 | return x - y; | |
33 | ||
6497a1d0 | 34 | return x <= y ? 0 : x - y; |
377a515b UD |
35 | } |
36 | weak_alias (__fdimf, fdimf) |