mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-26 23:10:06 +00:00
45 lines
1.5 KiB
C
45 lines
1.5 KiB
C
/* Software floating-point emulation.
|
|
(*c) = (*a) - (*b)
|
|
Copyright (C) 1997-2017 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 "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_SEMIRAW_QP(A, a);
|
|
FP_UNPACK_SEMIRAW_QP(B, b);
|
|
FP_SUB_Q(C, A, B);
|
|
FP_PACK_SEMIRAW_QP(c, C);
|
|
QP_HANDLE_EXCEPTIONS(__asm (
|
|
" ldd [%1], %%f52\n"
|
|
" ldd [%1+8], %%f54\n"
|
|
" ldd [%2], %%f56\n"
|
|
" ldd [%2+8], %%f58\n"
|
|
" fsubq %%f52, %%f56, %%f60\n"
|
|
" std %%f60, [%0]\n"
|
|
" std %%f62, [%0+8]\n"
|
|
" " : : "r" (c), "r" (a), "r" (b) : QP_CLOBBER));
|
|
}
|