From 11da511c784eca003deb90c23570f0873954e0de Mon Sep 17 00:00:00 2001 From: Duncan Wilkie Date: Sat, 18 Nov 2023 06:11:09 -0600 Subject: Initial commit. --- gmp-6.3.0/mpn/generic/redc_1.c | 56 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) create mode 100644 gmp-6.3.0/mpn/generic/redc_1.c (limited to 'gmp-6.3.0/mpn/generic/redc_1.c') diff --git a/gmp-6.3.0/mpn/generic/redc_1.c b/gmp-6.3.0/mpn/generic/redc_1.c new file mode 100644 index 0000000..eab128f --- /dev/null +++ b/gmp-6.3.0/mpn/generic/redc_1.c @@ -0,0 +1,56 @@ +/* mpn_redc_1. Set rp[] <- up[]/R^n mod mp[]. Clobber up[]. + mp[] is n limbs; up[] is 2n limbs. + + THIS IS AN INTERNAL FUNCTION WITH A MUTABLE INTERFACE. IT IS ONLY + SAFE TO REACH THIS FUNCTION THROUGH DOCUMENTED INTERFACES. + +Copyright (C) 2000-2002, 2004, 2008, 2009, 2012 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 either: + + * the GNU Lesser General Public License as published by the Free + Software Foundation; either version 3 of the License, or (at your + option) any later version. + +or + + * the GNU General Public License as published by the Free Software + Foundation; either version 2 of the License, or (at your option) any + later version. + +or both in parallel, as here. + +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 General Public License +for more details. + +You should have received copies of the GNU General Public License and the +GNU Lesser General Public License along with the GNU MP Library. If not, +see https://www.gnu.org/licenses/. */ + +#include "gmp-impl.h" + +mp_limb_t +mpn_redc_1 (mp_ptr rp, mp_ptr up, mp_srcptr mp, mp_size_t n, mp_limb_t invm) +{ + mp_size_t j; + mp_limb_t cy; + + ASSERT (n > 0); + ASSERT_MPN (up, 2*n); + + for (j = n - 1; j >= 0; j--) + { + cy = mpn_addmul_1 (up, mp, n, (up[0] * invm) & GMP_NUMB_MASK); + ASSERT (up[0] == 0); + up[0] = cy; + up++; + } + + cy = mpn_add_n (rp, up, up - n, n); + return cy; +} -- cgit v1.2.3