1 /* mpn_redc_1. Set cp[] <- up[]/R^n mod mp[]. Clobber up[].
2 mp[] is n limbs; up[] is 2n limbs.
4 THIS IS AN INTERNAL FUNCTION WITH A MUTABLE INTERFACE. IT IS ONLY
5 SAFE TO REACH THIS FUNCTION THROUGH DOCUMENTED INTERFACES.
7 Copyright (C) 2000, 2001, 2002, 2004, 2008, 2009 Free Software Foundation, Inc.
9 This file is part of the GNU MP Library.
11 The GNU MP Library is free software; you can redistribute it and/or modify
12 it under the terms of the GNU Lesser General Public License as published by
13 the Free Software Foundation; either version 3 of the License, or (at your
14 option) any later version.
16 The GNU MP Library is distributed in the hope that it will be useful, but
17 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
18 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
19 License for more details.
21 You should have received a copy of the GNU Lesser General Public License
22 along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. */
28 mpn_redc_1 (mp_ptr rp, mp_ptr up, mp_srcptr mp, mp_size_t n, mp_limb_t invm)
36 for (j = n - 1; j >= 0; j--)
38 cy = mpn_addmul_1 (up, mp, n, (up[0] * invm) & GMP_NUMB_MASK);
43 cy = mpn_add_n (rp, up, up - n, n);
45 mpn_sub_n (rp, rp, mp, n);