1 /* Return positive difference between arguments.
2    Copyright (C) 1997-2022 Free Software Foundation, Inc.
3    This file is part of the GNU C Library.
4 
5    The GNU C Library is free software; you can redistribute it and/or
6    modify it under the terms of the GNU Lesser General Public
7    License as published by the Free Software Foundation; either
8    version 2.1 of the License, or (at your option) any later version.
9 
10    The GNU C Library is distributed in the hope that it will be useful,
11    but WITHOUT ANY WARRANTY; without even the implied warranty of
12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13    Lesser General Public License for more details.
14 
15    You should have received a copy of the GNU Lesser General Public
16    License along with the GNU C Library; if not, see
17    <https://www.gnu.org/licenses/>.  */
18 
19 #include <errno.h>
20 #include <math.h>
21 #include <math-narrow-eval.h>
22 
23 FLOAT
M_DECL_FUNC(__fdim)24 M_DECL_FUNC (__fdim) (FLOAT x, FLOAT y)
25 {
26   if (islessequal (x, y))
27     return 0;
28 
29   FLOAT r = math_narrow_eval (x - y);
30   if (isinf (r) && !isinf (x) && !isinf (y))
31     __set_errno (ERANGE);
32 
33   return r;
34 }
35 declare_mgen_alias (__fdim, fdim);
36