diff options
Diffstat (limited to 'gnu/lib/libgmp/mpz/fdiv_r_2exp.c')
-rw-r--r-- | gnu/lib/libgmp/mpz/fdiv_r_2exp.c | 88 |
1 files changed, 0 insertions, 88 deletions
diff --git a/gnu/lib/libgmp/mpz/fdiv_r_2exp.c b/gnu/lib/libgmp/mpz/fdiv_r_2exp.c deleted file mode 100644 index 04190b1..0000000 --- a/gnu/lib/libgmp/mpz/fdiv_r_2exp.c +++ /dev/null @@ -1,88 +0,0 @@ -/* mpz_fdiv_r_2exp -- Divide a integer by 2**CNT and produce a remainder. - -Copyright (C) 1991, 1993, 1994, 1995 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_r_2exp (mpz_ptr res, mpz_srcptr in, unsigned long int cnt) -#else -mpz_fdiv_r_2exp (res, in, cnt) - mpz_ptr res; - mpz_srcptr in; - unsigned long int cnt; -#endif -{ - mp_size_t in_size = ABS (in->_mp_size); - mp_size_t res_size; - mp_size_t limb_cnt = cnt / BITS_PER_MP_LIMB; - mp_srcptr in_ptr = in->_mp_d; - - if (in_size > limb_cnt) - { - /* The input operand is (probably) greater than 2**CNT. */ - mp_limb_t x; - - x = in_ptr[limb_cnt] & (((mp_limb_t) 1 << cnt % BITS_PER_MP_LIMB) - 1); - if (x != 0) - { - res_size = limb_cnt + 1; - if (res->_mp_alloc < res_size) - _mpz_realloc (res, res_size); - - res->_mp_d[limb_cnt] = x; - } - else - { - res_size = limb_cnt; - MPN_NORMALIZE (in_ptr, res_size); - - if (res->_mp_alloc < res_size) - _mpz_realloc (res, res_size); - - limb_cnt = res_size; - } - } - else - { - /* The input operand is smaller than 2**CNT. We perform a no-op, - apart from that we might need to copy IN to RES. */ - res_size = in_size; - if (res->_mp_alloc < res_size) - _mpz_realloc (res, res_size); - - limb_cnt = res_size; - } - - if (res != in) - MPN_COPY (res->_mp_d, in->_mp_d, limb_cnt); - res->_mp_size = res_size; - if (in->_mp_size < 0 && res_size != 0) - { - /* Result should be 2^CNT - RES */ - mpz_t tmp; - MPZ_TMP_INIT (tmp, limb_cnt + 1); - mpz_set_ui (tmp, 1L); - mpz_mul_2exp (tmp, tmp, cnt); - mpz_sub (res, tmp, res); - } -} |