diff options
Diffstat (limited to 'libm/w_sqrtl.c')
| -rw-r--r-- | libm/w_sqrtl.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/libm/w_sqrtl.c b/libm/w_sqrtl.c new file mode 100644 index 000000000..525ac8f3c --- /dev/null +++ b/libm/w_sqrtl.c @@ -0,0 +1,33 @@ +/* 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 __NO_LONG_DOUBLE_MATH +/* wrapper sqrtl */ +long double +sqrtl (long double x) +{ +# if __UCLIBC_HAS_FENV__ + if (__builtin_expect (isless (x, 0.0L), 0) && _LIB_VERSION != _IEEE_) + return __kernel_standard_l (x, x, 226); /* sqrt(negative) */ +# endif /* __UCLIBC_HAS_FENV__ */ + return (long double) __ieee754_sqrt ((double) x); +} +#endif /* __NO_LONG_DOUBLE_MATH */ |