mirror of
https://github.com/vale981/arb
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77 lines
2.2 KiB
C
77 lines
2.2 KiB
C
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/*=============================================================================
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This file is part of ARB.
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ARB 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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ARB 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 ARB; 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) 2012 Fredrik Johansson
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******************************************************************************/
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#include "fmpcb_mat.h"
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void
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fmpcb_mat_mul(fmpcb_mat_t C, const fmpcb_mat_t A, const fmpcb_mat_t B, long prec)
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{
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long ar, ac, br, bc, i, j, k;
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ar = fmpcb_mat_nrows(A);
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ac = fmpcb_mat_ncols(A);
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br = fmpcb_mat_nrows(B);
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bc = fmpcb_mat_ncols(B);
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if (ac != br || ar != fmpcb_mat_nrows(C) || bc != fmpcb_mat_ncols(C))
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{
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printf("fmpcb_mat_mul: incompatible dimensions\n");
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abort();
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}
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if (br == 0)
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{
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fmpcb_mat_zero(C);
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return;
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}
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if (A == C || B == C)
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{
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fmpcb_mat_t T;
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fmpcb_mat_init(T, ar, bc);
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fmpcb_mat_mul(T, A, B, prec);
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fmpcb_mat_swap(T, C);
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fmpcb_mat_clear(T);
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return;
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}
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for (i = 0; i < ar; i++)
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{
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for (j = 0; j < bc; j++)
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{
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fmpcb_mul(fmpcb_mat_entry(C, i, j),
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fmpcb_mat_entry(A, i, 0),
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fmpcb_mat_entry(B, 0, j), prec);
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for (k = 1; k < br; k++)
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{
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fmpcb_addmul(fmpcb_mat_entry(C, i, j),
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fmpcb_mat_entry(A, i, k),
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fmpcb_mat_entry(B, k, j), prec);
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}
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}
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}
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}
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