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/* Software floating-point emulation.
(*c) = (*a) * (*b)
Copyright (C) 1997-2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
<https://www.gnu.org/licenses/>. */
/* 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\n"
" ldd [%1+8], %%f54\n"
" ldd [%2], %%f56\n"
" ldd [%2+8], %%f58\n"
" fmulq %%f52, %%f56, %%f60\n"
" std %%f60, [%0]\n"
" std %%f62, [%0+8]\n"
" " : : "r" (c), "r" (a), "r" (b) : QP_CLOBBER));
}
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