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.
88 lines
2.3 KiB
C
88 lines
2.3 KiB
C
/* mpz_com(mpz_ptr dst, mpz_ptr src) -- Assign the bit-complemented value of
|
|
SRC to DST.
|
|
|
|
Copyright 1991, 1993, 1994, 1996, 2001, 2003, 2012, 2015 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
|
|
mpz_com (mpz_ptr dst, mpz_srcptr src)
|
|
{
|
|
mp_size_t size = SIZ (src);
|
|
mp_srcptr src_ptr;
|
|
mp_ptr dst_ptr;
|
|
|
|
if (size >= 0)
|
|
{
|
|
/* As with infinite precision: one's complement, two's complement.
|
|
But this can be simplified using the identity -x = ~x + 1.
|
|
So we're going to compute (~~x) + 1 = x + 1! */
|
|
|
|
if (UNLIKELY (size == 0))
|
|
{
|
|
/* special case, as mpn_add_1 wants size!=0 */
|
|
MPZ_NEWALLOC (dst, 1)[0] = 1;
|
|
SIZ (dst) = -1;
|
|
}
|
|
else
|
|
{
|
|
mp_limb_t cy;
|
|
|
|
dst_ptr = MPZ_REALLOC (dst, size + 1);
|
|
|
|
src_ptr = PTR (src);
|
|
|
|
cy = mpn_add_1 (dst_ptr, src_ptr, size, (mp_limb_t) 1);
|
|
dst_ptr[size] = cy;
|
|
size += cy;
|
|
|
|
/* Store a negative size, to indicate ones-extension. */
|
|
SIZ (dst) = -size;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* As with infinite precision: two's complement, then one's complement.
|
|
But that can be simplified using the identity -x = ~(x - 1).
|
|
So we're going to compute ~~(x - 1) = x - 1! */
|
|
size = -size;
|
|
|
|
dst_ptr = MPZ_REALLOC (dst, size);
|
|
|
|
src_ptr = PTR (src);
|
|
|
|
mpn_sub_1 (dst_ptr, src_ptr, size, (mp_limb_t) 1);
|
|
size -= dst_ptr[size - 1] == 0;
|
|
|
|
/* Store a positive size, to indicate zero-extension. */
|
|
SIZ (dst) = size;
|
|
}
|
|
}
|