From ea38f4d89c9698895b1cf53a5946429dc1d8bbaa Mon Sep 17 00:00:00 2001 From: Sergey Cherkashin <4erkashin@list.ru> Date: Tue, 3 Oct 2017 15:26:34 +0300 Subject: math: add exception handling functionality According to standards SVID and SYSV. Modified lgamma calling in case when 'signgam' variable should not be used. Signed-off-by: Waldemar Brodkorb --- libm/w_atan2l.c | 44 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 libm/w_atan2l.c (limited to 'libm/w_atan2l.c') diff --git a/libm/w_atan2l.c b/libm/w_atan2l.c new file mode 100644 index 000000000..314e72249 --- /dev/null +++ b/libm/w_atan2l.c @@ -0,0 +1,44 @@ +/* Copyright (C) 2011-2016 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper , 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 + . */ + +#include +#include "math_private.h" +#if __UCLIBC_HAS_FENV__ +#include +#endif + +#if !defined __NO_LONG_DOUBLE_MATH +/* wrapper atan2l(y,x) */ +long double +atan2l (long double y, long double x) +{ +# if __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 */ -- cgit v1.2.3