/* Copyright (C) 2011-2016 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/>. */ #include <math.h> #include "math_private.h" #if defined(__UCLIBC_HAS_FENV__) #include <errno.h> #endif #if !defined __NO_LONG_DOUBLE_MATH /* wrapper atan2l(y,x) */ long double atan2l (long double y, long double x) { # if defined(__UCLIBC_HAS_FENV__) long double z; if (__builtin_expect (x == 0.0L && y == 0.0L, 0) && _LIB_VERSION == _SVID_) return __kernel_standard_l (y, x, 203); /* atan2(+-0,+-0) */ z = (long double) __ieee754_atan2 ((double)y,(double) x); if (__builtin_expect (z == 0.0L && y != 0.0L && isfinite (x),0)) __set_errno (ERANGE); return z; # else return (long double) __ieee754_atan2 ((double)y,(double) x); # endif /* __UCLIBC_HAS_FENV__ */ } #endif /* __NO_LONG_DOUBLE_MATH */