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/* long double square root in software floating-point emulation.
Copyright (C) 1997-2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Richard Henderson (rth@cygnus.com) and
Jakub Jelinek (jj@ultra.linux.cz).
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
<https://www.gnu.org/licenses/>. */
#include <stdlib.h>
#include <soft-fp.h>
#include <quad.h>
#include <shlib-compat.h>
long double
__ieee754_sqrtl (const long double a)
{
FP_DECL_EX;
FP_DECL_Q(A); FP_DECL_Q(C);
long double c;
long _round = 4; /* dynamic rounding */
FP_INIT_ROUNDMODE;
FP_UNPACK_Q(A, a);
FP_SQRT_Q(C, A);
FP_PACK_Q(c, C);
FP_HANDLE_EXCEPTIONS;
return c;
}
/* ??? We forgot to add this symbol in 2.15. Getting this into 2.18 isn't as
straight-forward as just adding the alias, since a generic Versions file
includes the 2.15 version and the linker uses the first one it sees. */
#if SHLIB_COMPAT (libm, GLIBC_2_15, GLIBC_2_18)
compat_symbol (libm, __ieee754_sqrtl, __sqrtl_finite, GLIBC_2_18);
#endif
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