|
Packit |
5c3484 |
/* mpf_mul -- Multiply two floats.
|
|
Packit |
5c3484 |
|
|
Packit |
5c3484 |
Copyright 1993, 1994, 1996, 2001, 2005 Free Software Foundation, Inc.
|
|
Packit |
5c3484 |
|
|
Packit |
5c3484 |
This file is part of the GNU MP Library.
|
|
Packit |
5c3484 |
|
|
Packit |
5c3484 |
The GNU MP Library is free software; you can redistribute it and/or modify
|
|
Packit |
5c3484 |
it under the terms of either:
|
|
Packit |
5c3484 |
|
|
Packit |
5c3484 |
* the GNU Lesser General Public License as published by the Free
|
|
Packit |
5c3484 |
Software Foundation; either version 3 of the License, or (at your
|
|
Packit |
5c3484 |
option) any later version.
|
|
Packit |
5c3484 |
|
|
Packit |
5c3484 |
or
|
|
Packit |
5c3484 |
|
|
Packit |
5c3484 |
* the GNU General Public License as published by the Free Software
|
|
Packit |
5c3484 |
Foundation; either version 2 of the License, or (at your option) any
|
|
Packit |
5c3484 |
later version.
|
|
Packit |
5c3484 |
|
|
Packit |
5c3484 |
or both in parallel, as here.
|
|
Packit |
5c3484 |
|
|
Packit |
5c3484 |
The GNU MP Library is distributed in the hope that it will be useful, but
|
|
Packit |
5c3484 |
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
|
|
Packit |
5c3484 |
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
|
Packit |
5c3484 |
for more details.
|
|
Packit |
5c3484 |
|
|
Packit |
5c3484 |
You should have received copies of the GNU General Public License and the
|
|
Packit |
5c3484 |
GNU Lesser General Public License along with the GNU MP Library. If not,
|
|
Packit |
5c3484 |
see https://www.gnu.org/licenses/. */
|
|
Packit |
5c3484 |
|
|
Packit |
5c3484 |
#include "gmp.h"
|
|
Packit |
5c3484 |
#include "gmp-impl.h"
|
|
Packit |
5c3484 |
|
|
Packit |
5c3484 |
void
|
|
Packit |
5c3484 |
mpf_mul (mpf_ptr r, mpf_srcptr u, mpf_srcptr v)
|
|
Packit |
5c3484 |
{
|
|
Packit |
5c3484 |
mp_srcptr up, vp;
|
|
Packit |
5c3484 |
mp_size_t usize, vsize;
|
|
Packit |
5c3484 |
mp_size_t sign_product;
|
|
Packit |
5c3484 |
mp_size_t prec = r->_mp_prec;
|
|
Packit |
5c3484 |
|
|
Packit |
5c3484 |
usize = u->_mp_size;
|
|
Packit |
5c3484 |
vsize = v->_mp_size;
|
|
Packit |
5c3484 |
sign_product = usize ^ vsize;
|
|
Packit |
5c3484 |
|
|
Packit |
5c3484 |
usize = ABS (usize);
|
|
Packit |
5c3484 |
vsize = ABS (vsize);
|
|
Packit |
5c3484 |
|
|
Packit |
5c3484 |
up = u->_mp_d;
|
|
Packit |
5c3484 |
vp = v->_mp_d;
|
|
Packit |
5c3484 |
if (usize > prec)
|
|
Packit |
5c3484 |
{
|
|
Packit |
5c3484 |
up += usize - prec;
|
|
Packit |
5c3484 |
usize = prec;
|
|
Packit |
5c3484 |
}
|
|
Packit |
5c3484 |
if (vsize > prec)
|
|
Packit |
5c3484 |
{
|
|
Packit |
5c3484 |
vp += vsize - prec;
|
|
Packit |
5c3484 |
vsize = prec;
|
|
Packit |
5c3484 |
}
|
|
Packit |
5c3484 |
|
|
Packit |
5c3484 |
if (usize == 0 || vsize == 0)
|
|
Packit |
5c3484 |
{
|
|
Packit |
5c3484 |
r->_mp_size = 0;
|
|
Packit |
5c3484 |
r->_mp_exp = 0; /* ??? */
|
|
Packit |
5c3484 |
}
|
|
Packit |
5c3484 |
else
|
|
Packit |
5c3484 |
{
|
|
Packit |
5c3484 |
mp_size_t rsize;
|
|
Packit |
5c3484 |
mp_limb_t cy_limb;
|
|
Packit |
5c3484 |
mp_ptr rp, tp;
|
|
Packit |
5c3484 |
mp_size_t adj;
|
|
Packit |
5c3484 |
TMP_DECL;
|
|
Packit |
5c3484 |
|
|
Packit |
5c3484 |
TMP_MARK;
|
|
Packit |
5c3484 |
rsize = usize + vsize;
|
|
Packit |
5c3484 |
tp = TMP_ALLOC_LIMBS (rsize);
|
|
Packit |
5c3484 |
cy_limb = (usize >= vsize
|
|
Packit |
5c3484 |
? mpn_mul (tp, up, usize, vp, vsize)
|
|
Packit |
5c3484 |
: mpn_mul (tp, vp, vsize, up, usize));
|
|
Packit |
5c3484 |
|
|
Packit |
5c3484 |
adj = cy_limb == 0;
|
|
Packit |
5c3484 |
rsize -= adj;
|
|
Packit |
5c3484 |
prec++;
|
|
Packit |
5c3484 |
if (rsize > prec)
|
|
Packit |
5c3484 |
{
|
|
Packit |
5c3484 |
tp += rsize - prec;
|
|
Packit |
5c3484 |
rsize = prec;
|
|
Packit |
5c3484 |
}
|
|
Packit |
5c3484 |
rp = r->_mp_d;
|
|
Packit |
5c3484 |
MPN_COPY (rp, tp, rsize);
|
|
Packit |
5c3484 |
r->_mp_exp = u->_mp_exp + v->_mp_exp - adj;
|
|
Packit |
5c3484 |
r->_mp_size = sign_product >= 0 ? rsize : -rsize;
|
|
Packit |
5c3484 |
|
|
Packit |
5c3484 |
TMP_FREE;
|
|
Packit |
5c3484 |
}
|
|
Packit |
5c3484 |
}
|