1 /* long double square root in software floating-point emulation.
2    Copyright (C) 1997-2022 Free Software Foundation, Inc.
3    This file is part of the GNU C Library.
4 
5    The GNU C Library is free software; you can redistribute it and/or
6    modify it under the terms of the GNU Lesser General Public
7    License as published by the Free Software Foundation; either
8    version 2.1 of the License, or (at your option) any later version.
9 
10    The GNU C Library is distributed in the hope that it will be useful,
11    but WITHOUT ANY WARRANTY; without even the implied warranty of
12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13    Lesser General Public License for more details.
14 
15    You should have received a copy of the GNU Lesser General Public
16    License along with the GNU C Library.  If not, see
17    <https://www.gnu.org/licenses/>.  */
18 
19 #include <stdlib.h>
20 #include <soft-fp.h>
21 #include <quad.h>
22 #include <libm-alias-finite.h>
23 
24 long double
__ieee754_sqrtl(const long double a)25 __ieee754_sqrtl (const long double a)
26 {
27   FP_DECL_EX;
28   FP_DECL_Q(A); FP_DECL_Q(C);
29   long double c;
30 
31   FP_INIT_ROUNDMODE;
32   FP_UNPACK_Q(A, a);
33   FP_SQRT_Q(C, A);
34   FP_PACK_Q(c, C);
35   FP_HANDLE_EXCEPTIONS;
36   return c;
37 }
38 libm_alias_finite (__ieee754_sqrtl, __sqrtl)
39