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/nussbaumer_mul.c | 70 ++++++++++++++++++++++++++++++++++ 1 file changed, 70 insertions(+) create mode 100644 gmp-6.3.0/mpn/generic/nussbaumer_mul.c (limited to 'gmp-6.3.0/mpn/generic/nussbaumer_mul.c') diff --git a/gmp-6.3.0/mpn/generic/nussbaumer_mul.c b/gmp-6.3.0/mpn/generic/nussbaumer_mul.c new file mode 100644 index 0000000..3e0cf27 --- /dev/null +++ b/gmp-6.3.0/mpn/generic/nussbaumer_mul.c @@ -0,0 +1,70 @@ +/* mpn_nussbaumer_mul -- Multiply {ap,an} and {bp,bn} using + Nussbaumer's negacyclic convolution. + + Contributed to the GNU project by Marco Bodrato. + + THE FUNCTION IN THIS FILE IS INTERNAL WITH A MUTABLE INTERFACE. IT IS ONLY + SAFE TO REACH IT THROUGH DOCUMENTED INTERFACES. IN FACT, IT IS ALMOST + GUARANTEED THAT IT WILL CHANGE OR DISAPPEAR IN A FUTURE GNU MP RELEASE. + +Copyright 2009 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" + +/* Multiply {ap,an} by {bp,bn}, and put the result in {pp, an+bn} */ +void +mpn_nussbaumer_mul (mp_ptr pp, + mp_srcptr ap, mp_size_t an, + mp_srcptr bp, mp_size_t bn) +{ + mp_size_t rn; + mp_ptr tp; + TMP_DECL; + + ASSERT (an >= bn); + ASSERT (bn > 0); + + TMP_MARK; + + if ((ap == bp) && (an == bn)) + { + rn = mpn_sqrmod_bnm1_next_size (2*an); + tp = TMP_ALLOC_LIMBS (mpn_sqrmod_bnm1_itch (rn, an)); + mpn_sqrmod_bnm1 (pp, rn, ap, an, tp); + } + else + { + rn = mpn_mulmod_bnm1_next_size (an + bn); + tp = TMP_ALLOC_LIMBS (mpn_mulmod_bnm1_itch (rn, an, bn)); + mpn_mulmod_bnm1 (pp, rn, ap, an, bp, bn, tp); + } + + TMP_FREE; +} -- cgit v1.2.3