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

44 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) 2011, 2012 Sebastian Pancratz
Copyright (C) 2012 Andres Goens
Copyright (C) 2013 Mike Hansen
******************************************************************************/
#include "fq.h"
void
fq_sub(fq_t rop, const fq_t op1, const fq_t op2, const fq_ctx_t ctx)
{
slong max = FLINT_MAX(op1->length, op2->length);
fmpz_poly_fit_length(rop, max);
_fmpz_mod_poly_sub(rop->coeffs,
op1->coeffs, op1->length, op2->coeffs, op2->length,
fq_ctx_prime(ctx));
_fmpz_poly_set_length(rop, max);
_fmpz_poly_normalise(rop);
}