1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
|
/* Software floating-point emulation.
Return (double)(*a)
Copyright (C) 1997-2019 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
<http://www.gnu.org/licenses/>. */
#include "soft-fp.h"
#include "double.h"
#include "quad.h"
double _Qp_qtod(const long double *a)
{
FP_DECL_EX;
FP_DECL_Q(A);
FP_DECL_D(R);
double r;
FP_INIT_ROUNDMODE;
FP_UNPACK_SEMIRAW_QP(A, a);
#if (2 * _FP_W_TYPE_SIZE) < _FP_FRACBITS_Q
FP_TRUNC(D,Q,2,4,R,A);
#else
FP_TRUNC(D,Q,1,2,R,A);
#endif
FP_PACK_SEMIRAW_D(r, R);
QP_HANDLE_EXCEPTIONS(__asm (
" ldd [%1], %%f52\n"
" ldd [%1+8], %%f54\n"
" fqtod %%f52, %0\n"
" " : "=&e" (r) : "r" (a) : QP_CLOBBER));
return r;
}
|
