1 /* Copyright (C) 2011-2019 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@gmail.com>, 2011.
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.
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.
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/>. */
25 #include <math_private.h>
26 #include <math-svid-compat.h>
27 #include <libm-alias-float.h>
32 __atan2f (float y
, float x
)
36 if (__builtin_expect (x
== 0.0f
&& y
== 0.0f
, 0) && _LIB_VERSION
== _SVID_
)
37 return __kernel_standard_f (y
, x
, 103); /* atan2(+-0,+-0) */
39 z
= __ieee754_atan2f (y
, x
);
40 if (__glibc_unlikely (z
== 0.0f
&& y
!= 0.0f
&& isfinite (x
)))
44 libm_alias_float (__atan2
, atan2
)