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1 | /* Copyright (C) 2011 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. | |
3 | Contributed by Ulrich Drepper <drepper@gmail.com>, 2011. | |
f7eac6eb | 4 | |
0ac5ae23 UD |
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, write to the Free | |
17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
18 | 02111-1307 USA. */ | |
f7eac6eb | 19 | |
cccda09f | 20 | /* |
f7eac6eb RM |
21 | * wrapper atan2(y,x) |
22 | */ | |
23 | ||
9d13fb24 | 24 | #include <math.h> |
9277c064 | 25 | #include <math_private.h> |
f7eac6eb RM |
26 | |
27 | ||
0ac5ae23 UD |
28 | double |
29 | __atan2 (double y, double x) | |
f7eac6eb | 30 | { |
0ac5ae23 UD |
31 | if (__builtin_expect (x == 0.0 && y == 0.0, 0) && _LIB_VERSION == _SVID_) |
32 | return __kernel_standard (y, x, 3); /* atan2(+-0,+-0) */ | |
33 | ||
34 | return __ieee754_atan2 (y, x); | |
f7eac6eb RM |
35 | } |
36 | weak_alias (__atan2, atan2) | |
cccda09f UD |
37 | #ifdef NO_LONG_DOUBLE |
38 | strong_alias (__atan2, __atan2l) | |
39 | weak_alias (__atan2, atan2l) | |
40 | #endif |