pqc/external/flint-2.4.3/mpfr_vec/scalar_product.c
2014-05-24 23:16:06 +02:00

49 lines
1.5 KiB
C

/*=============================================================================
This file is part of FLINT.
FLINT is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
FLINT is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with FLINT; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
=============================================================================*/
/******************************************************************************
Copyright (C) 2010 William Hart
******************************************************************************/
#include <stdlib.h>
#include <gmp.h>
#include <mpfr.h>
#include "flint.h"
#include "mpfr_vec.h"
void
_mpfr_vec_scalar_product(mpfr_t res, const mpfr * vec1,
const mpfr * vec2, slong length)
{
slong i;
mpfr_t tmp;
mpfr_init(tmp);
mpfr_mul(res, vec1, vec2, GMP_RNDN);
for (i = 1; i < length; i++)
{
mpfr_mul(tmp, vec1 + i, vec2 + i, GMP_RNDN);
mpfr_add(res, res, tmp, GMP_RNDN);
}
mpfr_clear(tmp);
}