mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-29 05:51:10 +00:00
46 lines
1.5 KiB
C
46 lines
1.5 KiB
C
/* long double square root in software floating-point emulation.
|
|
Copyright (C) 1997-2023 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
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
|