69 lines
2.1 KiB
C
69 lines
2.1 KiB
C
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/*=============================================================================
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This file is part of FLINT.
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FLINT is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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FLINT is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with FLINT; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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=============================================================================*/
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/******************************************************************************
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Copyright (C) 2011 Fredrik Johansson
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******************************************************************************/
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#include "flint.h"
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#include "nmod_poly.h"
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#include "nmod_poly_mat.h"
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#define KS_MIN_DIM 10
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#define INTERPOLATE_MIN_DIM 60
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#define KS_MAX_LENGTH 128
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void
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nmod_poly_mat_mul(nmod_poly_mat_t C, const nmod_poly_mat_t A,
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const nmod_poly_mat_t B)
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{
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slong ar, bc, br, dim;
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ar = A->r;
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br = B->r;
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bc = B->c;
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dim = FLINT_MIN(FLINT_MIN(ar, br), bc);
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if (dim < KS_MIN_DIM)
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{
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nmod_poly_mat_mul_classical(C, A, B);
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}
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else
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{
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slong Alen, Blen;
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mp_limb_t mod = nmod_poly_mat_modulus(A);
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Alen = nmod_poly_mat_max_length(A);
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Blen = nmod_poly_mat_max_length(B);
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if ((FLINT_BIT_COUNT(mod) > FLINT_BITS / 4)
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&& (dim > INTERPOLATE_MIN_DIM + n_sqrt(FLINT_MIN(Alen, Blen)))
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&& (mod >= Alen + Blen - 1) && n_is_prime(mod))
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nmod_poly_mat_mul_interpolate(C, A, B);
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else if (Alen > KS_MAX_LENGTH || Blen > KS_MAX_LENGTH)
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nmod_poly_mat_mul_classical(C, A, B);
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else
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nmod_poly_mat_mul_KS(C, A, B);
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}
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}
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