mirror of
https://review.haiku-os.org/buildtools
synced 2025-01-31 10:34:41 +01:00
4c74403188
Change-Id: Iae65e95cfa0d92091b8b0a424ae36d88efa76aa9 Reviewed-on: https://review.haiku-os.org/c/buildtools/+/3020 Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>
59 lines
1.8 KiB
C
59 lines
1.8 KiB
C
/* mpn_bdiv_dbm1c -- divide an mpn number by a divisor of B-1, where B is the
|
|
limb base. The dbm1c moniker means "Divisor of B Minus 1 with Carry".
|
|
|
|
THE FUNCTION IN THIS FILE IS INTERNAL WITH A MUTABLE INTERFACE. IT IS ONLY
|
|
SAFE TO REACH IT THROUGH DOCUMENTED INTERFACES. IN FACT, IT IS ALMOST
|
|
GUARANTEED THAT IT'LL CHANGE OR DISAPPEAR IN A FUTURE GNU MP RELEASE.
|
|
|
|
Copyright 2008, 2009 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"
|
|
#include "longlong.h"
|
|
|
|
|
|
mp_limb_t
|
|
mpn_bdiv_dbm1c (mp_ptr qp, mp_srcptr ap, mp_size_t n, mp_limb_t bd, mp_limb_t h)
|
|
{
|
|
mp_limb_t a, p0, p1, cy;
|
|
mp_size_t i;
|
|
|
|
for (i = 0; i < n; i++)
|
|
{
|
|
a = ap[i];
|
|
umul_ppmm (p1, p0, a, bd << GMP_NAIL_BITS);
|
|
p0 >>= GMP_NAIL_BITS;
|
|
cy = h < p0;
|
|
h = (h - p0) & GMP_NUMB_MASK;
|
|
qp[i] = h;
|
|
h = h - p1 - cy;
|
|
}
|
|
|
|
return h;
|
|
}
|