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/*
Copyright (C) 2021 Daniel Schultz
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 "fmpz.h"
#include "fmpz_vec.h"
#include "fmpz_mat.h"
void fmpz_mat_mul_fmpz_vec(
fmpz * c,
const fmpz_mat_t A,
const fmpz * b, slong blen)
{
slong i;
slong len = FLINT_MIN(A->c, blen);
for (i = A->r - 1; i >= 0; i--)
_fmpz_vec_dot(c + i, fmpz_mat_row(A, i), b, len);
}
void fmpz_mat_mul_fmpz_vec_ptr(
fmpz * const * c,
const fmpz_mat_t A,
const fmpz * const * b, slong blen)
{
slong i, j;
slong len = FLINT_MIN(A->c, blen);
for (i = A->r - 1; i >= 0; i--)
{
fmpz * ci = c[i];
const fmpz * Ai = fmpz_mat_row(A, i);
fmpz_zero(ci);
for (j = 0; j < len; j++)
fmpz_addmul(ci, Ai + j, b[j]);
}
}