diff options
author | Sergey Cherkashin <4erkashin@list.ru> | 2017-10-03 15:26:34 +0300 |
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committer | Waldemar Brodkorb <wbx@uclibc-ng.org> | 2017-11-03 20:23:10 +0100 |
commit | ea38f4d89c9698895b1cf53a5946429dc1d8bbaa (patch) | |
tree | e05828ca1fedf55f104b837bc9c44215c2978e99 /libm/w_j0l.c | |
parent | 68de9946e914d8c30dcc6667a059ea59e5b74cac (diff) |
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 <wbx@uclibc-ng.org>
Diffstat (limited to 'libm/w_j0l.c')
-rw-r--r-- | libm/w_j0l.c | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/libm/w_j0l.c b/libm/w_j0l.c new file mode 100644 index 000000000..2f355709a --- /dev/null +++ b/libm/w_j0l.c @@ -0,0 +1,68 @@ +/* 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 __UCLIBC_HAS_FENV__ +#include <fenv.h> +#endif + +#if !defined __NO_LONG_DOUBLE_MATH +# ifndef __DO_XSI_MATH__ +/* wrapper j0l */ +long double +j0l (long double x) +{ +# if __UCLIBC_HAS_FENV__ + if (__builtin_expect (isgreater (fabsl (x), X_TLOSS), 0) + && _LIB_VERSION != _IEEE_ && _LIB_VERSION != _POSIX_) + /* j0(|x|>X_TLOSS) */ + return __kernel_standard_l (x, x, 234); +# endif /* __UCLIBC_HAS_FENV__ */ + return (long double) __ieee754_j0 ((double)x); +} + +/* wrapper y0l */ +long double +y0l (long double x) +{ +# if __UCLIBC_HAS_FENV__ + if (__builtin_expect (islessequal (x, 0.0L) || isgreater (x, X_TLOSS), 0) + && _LIB_VERSION != _IEEE_) + { + if (x < 0.0L) + { + /* d = zero/(x-x) */ + feraiseexcept (FE_INVALID); + return __kernel_standard_l (x, x, 209); + } + else if (x == 0.0L) + { + /* d = -one/(x-x) */ + feraiseexcept (FE_DIVBYZERO); + return __kernel_standard_l (x, x, 208); + } + else if (_LIB_VERSION != _POSIX_) + /* y0(x>X_TLOSS) */ + return __kernel_standard_l (x, x, 235); + } +# endif /* __UCLIBC_HAS_FENV__ */ + return (long double)__ieee754_y0 ((double) x); +} +# endif /* __DO_XSI_MATH__ */ +#endif /* !defined __NO_LONG_DOUBLE_MATH */ |