| /* Copyright (C) 2011-2018 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by Ulrich Drepper <drepper@gmail.com>, 2011. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| /* |
| * wrapper atan2f(y,x) |
| */ |
| |
| #include <errno.h> |
| #include <math.h> |
| #include <math_private.h> |
| #include <math-svid-compat.h> |
| #include <libm-alias-float.h> |
| |
| |
| #if LIBM_SVID_COMPAT |
| float |
| __atan2f (float y, float x) |
| { |
| float z; |
| |
| if (__builtin_expect (x == 0.0f && y == 0.0f, 0) && _LIB_VERSION == _SVID_) |
| return __kernel_standard_f (y, x, 103); /* atan2(+-0,+-0) */ |
| |
| z = __ieee754_atan2f (y, x); |
| if (__glibc_unlikely (z == 0.0f && y != 0.0f && isfinite (x))) |
| __set_errno (ERANGE); |
| return z; |
| } |
| libm_alias_float (__atan2, atan2) |
| #endif |
