pqc/external/flint-2.4.3/nmod_mat/addmul.c
2014-05-24 23:16:06 +02:00

57 lines
1.7 KiB
C

/*=============================================================================
This file is part of FLINT.
FLINT is free software; you can redistribute it and/or modify
it under the terms of 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.
FLINT 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 a copy of the GNU General Public License
along with FLINT; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
=============================================================================*/
/******************************************************************************
Copyright (C) 2011 Fredrik Johansson
******************************************************************************/
#include <stdlib.h>
#include <gmp.h>
#include "flint.h"
#include "nmod_mat.h"
#include "nmod_vec.h"
void
nmod_mat_addmul(nmod_mat_t D, const nmod_mat_t C,
const nmod_mat_t A, const nmod_mat_t B)
{
slong m, k, n;
m = A->r;
k = A->c;
n = B->c;
if (m < NMOD_MAT_MUL_STRASSEN_CUTOFF ||
n < NMOD_MAT_MUL_STRASSEN_CUTOFF ||
k < NMOD_MAT_MUL_STRASSEN_CUTOFF)
{
_nmod_mat_mul_classical(D, C, A, B, 1);
}
else
{
nmod_mat_t tmp;
nmod_mat_init(tmp, m, n, A->mod.n);
nmod_mat_mul_strassen(tmp, A, B);
nmod_mat_add(D, C, tmp);
nmod_mat_clear(tmp);
}
}