version 1.1, 2000/01/10 15:35:27 |
version 1.1.1.3, 2003/08/25 16:06:34 |
|
|
/* mpz_tdiv_q_2exp -- Divide an integer by 2**CNT. Round the quotient |
/* mpz_tdiv_q_2exp -- Divide an integer by 2**CNT. Round the quotient |
towards -infinity. |
towards -infinity. |
|
|
Copyright (C) 1991, 1993, 1994, 1996 Free Software Foundation, Inc. |
Copyright 1991, 1993, 1994, 1996, 2001, 2002 Free Software Foundation, Inc. |
|
|
This file is part of the GNU MP Library. |
This file is part of the GNU MP Library. |
|
|
The GNU MP Library is free software; you can redistribute it and/or modify |
The GNU MP Library is free software; you can redistribute it and/or modify |
it under the terms of the GNU Library General Public License as published by |
it under the terms of the GNU Lesser General Public License as published by |
the Free Software Foundation; either version 2 of the License, or (at your |
the Free Software Foundation; either version 2.1 of the License, or (at your |
option) any later version. |
option) any later version. |
|
|
The GNU MP Library is distributed in the hope that it will be useful, but |
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 |
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public |
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public |
License for more details. |
License for more details. |
|
|
You should have received a copy of the GNU Library General Public License |
You should have received a copy of the GNU Lesser General Public License |
along with the GNU MP Library; see the file COPYING.LIB. If not, write to |
along with the GNU MP Library; see the file COPYING.LIB. If not, write to |
the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
MA 02111-1307, USA. */ |
MA 02111-1307, USA. */ |
Line 24 MA 02111-1307, USA. */ |
|
Line 24 MA 02111-1307, USA. */ |
|
#include "gmp-impl.h" |
#include "gmp-impl.h" |
|
|
void |
void |
#if __STDC__ |
|
mpz_tdiv_q_2exp (mpz_ptr w, mpz_srcptr u, unsigned long int cnt) |
mpz_tdiv_q_2exp (mpz_ptr w, mpz_srcptr u, unsigned long int cnt) |
#else |
|
mpz_tdiv_q_2exp (w, u, cnt) |
|
mpz_ptr w; |
|
mpz_srcptr u; |
|
unsigned long int cnt; |
|
#endif |
|
{ |
{ |
mp_size_t usize, wsize; |
mp_size_t usize, wsize; |
mp_size_t limb_cnt; |
mp_size_t limb_cnt; |
|
|
usize = u->_mp_size; |
usize = u->_mp_size; |
limb_cnt = cnt / BITS_PER_MP_LIMB; |
limb_cnt = cnt / GMP_NUMB_BITS; |
wsize = ABS (usize) - limb_cnt; |
wsize = ABS (usize) - limb_cnt; |
if (wsize <= 0) |
if (wsize <= 0) |
w->_mp_size = 0; |
w->_mp_size = 0; |
Line 52 mpz_tdiv_q_2exp (w, u, cnt) |
|
Line 45 mpz_tdiv_q_2exp (w, u, cnt) |
|
wp = w->_mp_d; |
wp = w->_mp_d; |
up = u->_mp_d; |
up = u->_mp_d; |
|
|
cnt %= BITS_PER_MP_LIMB; |
cnt %= GMP_NUMB_BITS; |
if (cnt != 0) |
if (cnt != 0) |
{ |
{ |
mpn_rshift (wp, up + limb_cnt, wsize, cnt); |
mpn_rshift (wp, up + limb_cnt, wsize, cnt); |