version 1.1.1.2, 2000/09/09 14:12:59 |
version 1.1.1.3, 2003/08/25 16:06:34 |
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/* 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. |
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Copyright (C) 1991, 1993, 1994, 1996 Free Software Foundation, Inc. |
Copyright 1991, 1993, 1994, 1996, 2001, 2002 Free Software Foundation, Inc. |
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This file is part of the GNU MP Library. |
This file is part of the GNU MP Library. |
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Line 24 MA 02111-1307, USA. */ |
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Line 24 MA 02111-1307, USA. */ |
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#include "gmp-impl.h" |
#include "gmp-impl.h" |
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void |
void |
#if __STDC__ |
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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 |
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mpz_tdiv_q_2exp (w, u, cnt) |
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mpz_ptr w; |
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mpz_srcptr u; |
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unsigned long int cnt; |
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#endif |
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{ |
{ |
mp_size_t usize, wsize; |
mp_size_t usize, wsize; |
mp_size_t limb_cnt; |
mp_size_t limb_cnt; |
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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) |
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Line 45 mpz_tdiv_q_2exp (w, u, cnt) |
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wp = w->_mp_d; |
wp = w->_mp_d; |
up = u->_mp_d; |
up = u->_mp_d; |
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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); |