60 lines
1.9 KiB
C
60 lines
1.9 KiB
C
/*=============================================================================
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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 "fmpz_mat.h"
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void
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fmpz_mat_CRT_ui(fmpz_mat_t res, const fmpz_mat_t mat1,
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const fmpz_t m1, const nmod_mat_t mat2, int sign)
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{
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slong i, j;
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mp_limb_t c;
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mp_limb_t m2 = mat2->mod.n;
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mp_limb_t m2inv = mat2->mod.ninv;
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fmpz_t m1m2;
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c = fmpz_fdiv_ui(m1, m2);
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c = n_invmod(c, m2);
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if (c == 0)
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{
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flint_printf("Exception (fmpz_mat_CRT_ui). m1 not invertible modulo m2.\n");
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abort();
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}
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fmpz_init(m1m2);
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fmpz_mul_ui(m1m2, m1, m2);
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for (i = 0; i < mat1->r; i++)
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{
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for (j = 0; j < mat1->c; j++)
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_fmpz_CRT_ui_precomp(fmpz_mat_entry(res, i, j),
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fmpz_mat_entry(mat1, i, j), m1,
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nmod_mat_entry(mat2, i, j), m2, m2inv, m1m2, c, sign);
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}
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fmpz_clear(m1m2);
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}
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