vasilito
facf0c92e0
Red Bear OS is a full fork. All sources must be available from git clone with zero network access. Removed gitignore rules that excluded fetched source trees under recipes/*/source/, local/recipes/kde/*/source/, local/recipes/qt/*/source/, and vendor source trees. Build artifacts (target/, build/, source.tar, *.o, *.so) remain excluded. 127291 files added — kernel, relibc, base, bootloader, pkgar, all KDE/Qt frameworks, mesa, wayland, DRM drivers, and every other recipe source.
135 lines
2.6 KiB
C
135 lines
2.6 KiB
C
/* mpf_mul -- Multiply two floats.
|
|
|
|
Copyright 1993, 1994, 1996, 2001, 2005, 2019, 2020 Free Software
|
|
Foundation, Inc.
|
|
|
|
This file is part of the GNU MP Library.
|
|
|
|
The GNU MP Library is free software; you can redistribute it and/or modify
|
|
it under the terms of either:
|
|
|
|
* the GNU Lesser General Public License as published by the Free
|
|
Software Foundation; either version 3 of the License, or (at your
|
|
option) any later version.
|
|
|
|
or
|
|
|
|
* the GNU General Public License as published by the Free Software
|
|
Foundation; either version 2 of the License, or (at your option) any
|
|
later version.
|
|
|
|
or both in parallel, as here.
|
|
|
|
The GNU MP 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 General Public License
|
|
for more details.
|
|
|
|
You should have received copies of the GNU General Public License and the
|
|
GNU Lesser General Public License along with the GNU MP Library. If not,
|
|
see https://www.gnu.org/licenses/. */
|
|
|
|
#include "gmp-impl.h"
|
|
|
|
void
|
|
mpf_mul (mpf_ptr r, mpf_srcptr u, mpf_srcptr v)
|
|
{
|
|
mp_size_t sign_product;
|
|
mp_size_t prec = PREC (r);
|
|
mp_size_t rsize;
|
|
mp_limb_t cy_limb;
|
|
mp_ptr rp, tp;
|
|
mp_size_t adj;
|
|
TMP_DECL;
|
|
|
|
if (u == v)
|
|
{
|
|
mp_srcptr up;
|
|
mp_size_t usize;
|
|
|
|
sign_product = 0;
|
|
|
|
usize = ABSIZ (u);
|
|
|
|
up = PTR (u);
|
|
if (usize > prec)
|
|
{
|
|
up += usize - prec;
|
|
usize = prec;
|
|
}
|
|
|
|
if (usize == 0)
|
|
{
|
|
SIZ (r) = 0;
|
|
EXP (r) = 0; /* ??? */
|
|
return;
|
|
}
|
|
else
|
|
{
|
|
TMP_MARK;
|
|
rsize = 2 * usize;
|
|
tp = TMP_ALLOC_LIMBS (rsize);
|
|
|
|
mpn_sqr (tp, up, usize);
|
|
cy_limb = tp[rsize - 1];
|
|
}
|
|
}
|
|
else
|
|
{
|
|
mp_srcptr up, vp;
|
|
mp_size_t usize, vsize;
|
|
|
|
usize = SIZ (u);
|
|
vsize = SIZ (v);
|
|
sign_product = usize ^ vsize;
|
|
|
|
usize = ABS (usize);
|
|
vsize = ABS (vsize);
|
|
|
|
up = PTR (u);
|
|
vp = PTR (v);
|
|
if (usize > prec)
|
|
{
|
|
up += usize - prec;
|
|
usize = prec;
|
|
}
|
|
if (vsize > prec)
|
|
{
|
|
vp += vsize - prec;
|
|
vsize = prec;
|
|
}
|
|
|
|
if (usize == 0 || vsize == 0)
|
|
{
|
|
SIZ (r) = 0;
|
|
EXP (r) = 0;
|
|
return;
|
|
}
|
|
else
|
|
{
|
|
TMP_MARK;
|
|
rsize = usize + vsize;
|
|
tp = TMP_ALLOC_LIMBS (rsize);
|
|
cy_limb = (usize >= vsize
|
|
? mpn_mul (tp, up, usize, vp, vsize)
|
|
: mpn_mul (tp, vp, vsize, up, usize));
|
|
|
|
}
|
|
}
|
|
|
|
adj = cy_limb == 0;
|
|
rsize -= adj;
|
|
prec++;
|
|
if (rsize > prec)
|
|
{
|
|
tp += rsize - prec;
|
|
rsize = prec;
|
|
}
|
|
rp = PTR (r);
|
|
MPN_COPY (rp, tp, rsize);
|
|
EXP (r) = EXP (u) + EXP (v) - adj;
|
|
SIZ (r) = sign_product >= 0 ? rsize : -rsize;
|
|
|
|
TMP_FREE;
|
|
}
|