diff options
Diffstat (limited to 'gnu/lib/libgmp/mpz/fdiv_q_2exp.c')
-rw-r--r-- | gnu/lib/libgmp/mpz/fdiv_q_2exp.c | 94 |
1 files changed, 0 insertions, 94 deletions
diff --git a/gnu/lib/libgmp/mpz/fdiv_q_2exp.c b/gnu/lib/libgmp/mpz/fdiv_q_2exp.c deleted file mode 100644 index 3f56baf..0000000 --- a/gnu/lib/libgmp/mpz/fdiv_q_2exp.c +++ /dev/null @@ -1,94 +0,0 @@ -/* mpz_fdiv_q_2exp -- Divide an integer by 2**CNT. Round the quotient - towards -infinity. - -Copyright (C) 1991, 1993, 1994, 1996 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 the GNU Library General Public License as published by -the Free Software Foundation; either version 2 of the License, or (at your -option) any later version. - -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 Library General Public -License for more details. - -You should have received a copy of the GNU Library General Public License -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, -MA 02111-1307, USA. */ - -#include "gmp.h" -#include "gmp-impl.h" - -void -#if __STDC__ -mpz_fdiv_q_2exp (mpz_ptr w, mpz_srcptr u, unsigned long int cnt) -#else -mpz_fdiv_q_2exp (w, u, cnt) - mpz_ptr w; - mpz_srcptr u; - unsigned long int cnt; -#endif -{ - mp_size_t usize = u->_mp_size; - mp_size_t wsize; - mp_size_t abs_usize = ABS (usize); - mp_size_t limb_cnt; - mp_ptr wp; - mp_limb_t round = 0; - - limb_cnt = cnt / BITS_PER_MP_LIMB; - wsize = abs_usize - limb_cnt; - if (wsize <= 0) - { - wp = w->_mp_d; - wsize = 0; - /* Set ROUND since we know we skip some non-zero words in this case. - Well, if U is zero, we don't, but then this will be taken care of - below, since rounding only really takes place for negative U. */ - round = 1; - wp[0] = 1; - w->_mp_size = -(usize < 0); - return; - } - else - { - mp_size_t i; - mp_ptr up; - - /* Make sure there is enough space. We make an extra limb - here to account for possible rounding at the end. */ - if (w->_mp_alloc < wsize + 1) - _mpz_realloc (w, wsize + 1); - - wp = w->_mp_d; - up = u->_mp_d; - - /* Set ROUND if we are about skip some non-zero limbs. */ - for (i = 0; i < limb_cnt && round == 0; i++) - round = up[i]; - - cnt %= BITS_PER_MP_LIMB; - if (cnt != 0) - { - round |= mpn_rshift (wp, up + limb_cnt, wsize, cnt); - wsize -= wp[wsize - 1] == 0; - } - else - { - MPN_COPY_INCR (wp, up + limb_cnt, wsize); - } - } - - if (usize < 0 && round != 0) - { - mp_limb_t cy; - cy = mpn_add_1 (wp, wp, wsize, 1); - wp[wsize] = cy; - wsize += cy; - } - w->_mp_size = usize >= 0 ? wsize : -wsize; -} |