1 | /* Copyright (C) 2011-2016 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. |
3 | Contributed by Ulrich Drepper <drepper@gmail.com>, 2011. |
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 | <http://www.gnu.org/licenses/>. */ |
18 | |
19 | /* |
20 | * wrapper atan2l(y,x) |
21 | */ |
22 | |
23 | #include <errno.h> |
24 | #include <math.h> |
25 | #include <math_private.h> |
26 | |
27 | |
28 | long double |
29 | __atan2l (long double y, long double x) |
30 | { |
31 | long double z; |
32 | |
33 | if (__builtin_expect (x == 0.0L && y == 0.0L, 0) && _LIB_VERSION == _SVID_) |
34 | return __kernel_standard_l (y, x, 203); /* atan2(+-0,+-0) */ |
35 | |
36 | z = __ieee754_atan2l (y, x); |
37 | if (__glibc_unlikely (z == 0.0L && y != 0.0L && isfinite (x))) |
38 | __set_errno (ERANGE); |
39 | return z; |
40 | } |
41 | weak_alias (__atan2l, atan2l) |
42 | |