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/*
Copyright (C) 2011 Fredrik Johansson
This file is part of FLINT.
FLINT is free software: you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License (LGPL) as published
by the Free Software Foundation; either version 3 of the License, or
(at your option) any later version. See <https://www.gnu.org/licenses/>.
*/
#include "nmod_mat.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, cutoff;
m = A->r;
k = A->c;
n = B->c;
if (FLINT_BITS == 64 && C->mod.n < 2048)
cutoff = 400;
else
cutoff = 200;
if (flint_get_num_threads() == 1 && (m < cutoff || n < cutoff || k < cutoff))
{
_nmod_mat_mul_classical_op(D, C, A, B, 1);
}
else
{
nmod_mat_t tmp;
nmod_mat_init(tmp, m, n, A->mod.n);
nmod_mat_mul(tmp, A, B);
nmod_mat_add(D, C, tmp);
nmod_mat_clear(tmp);
}
}