mirror of
https://sourceware.org/git/glibc.git
synced 2025-11-03 20:53:13 +03:00
46 lines
1.5 KiB
C
46 lines
1.5 KiB
C
/* 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. */
|
|
|
|
#include "soft-fp.h"
|
|
#include "quad.h"
|
|
|
|
void _Qp_sub(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_SUB_Q(C, A, B);
|
|
FP_PACK_QP(c, C);
|
|
QP_HANDLE_EXCEPTIONS(__asm (
|
|
"ldd [%1], %%f52
|
|
ldd [%1+8], %%f54
|
|
ldd [%2], %%f56
|
|
ldd [%2+8], %%f58
|
|
fsubq %%f52, %%f56, %%f60
|
|
std %%f60, [%0]
|
|
std %%f62, [%0+8]
|
|
" : : "r" (c), "r" (a), "r" (b) : QP_CLOBBER));
|
|
}
|