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
49
50
|
/* Software floating-point emulation.
(*c) = (*a) * (*b)
Copyright (C) 1997,1999 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 Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc.,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* As QP_HANDLE_EXCEPTIONS reloads FPU control word anyway,
avoid doing it twice. */
#define _FP_MUL_MEAT_RESET_FE do {} while (0)
#include "soft-fp.h"
#include "quad.h"
void _Qp_mul(long double *c, const long double *a, const long double *b)
{
FP_DECL_EX;
FP_DECL_Q(A); FP_DECL_Q(B); FP_DECL_Q(C);
FP_INIT_ROUNDMODE;
FP_UNPACK_QP(A, a);
FP_UNPACK_QP(B, b);
FP_MUL_Q(C, A, B);
FP_PACK_QP(c, C);
QP_HANDLE_EXCEPTIONS(
_FPU_SETCW(_fcw);
__asm (
"ldd [%1], %%f52
ldd [%1+8], %%f54
ldd [%2], %%f56
ldd [%2+8], %%f58
fmulq %%f52, %%f56, %%f60
std %%f60, [%0]
std %%f62, [%0+8]
" : : "r" (c), "r" (a), "r" (b) : QP_CLOBBER));
}
|
