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

104 lines
3.1 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) 2012 Sebastian Pancratz
Copyright (C) 2013 Mike Hansen
******************************************************************************/
#ifdef T
#include "templates.h"
void
_TEMPLATE(T, poly_sqr_classical) (TEMPLATE(T, struct) * rop,
const TEMPLATE(T, struct) * op, slong len,
const TEMPLATE(T, ctx_t) ctx)
{
if (len == 1)
{
TEMPLATE(T, mul) (rop, op, op, ctx);
}
else
{
slong i;
TEMPLATE(T, t) t;
TEMPLATE(T, init) (t, ctx);
_TEMPLATE(T, TEMPLATE(poly_scalar_mul, T)) (rop, op, len, op, ctx);
_TEMPLATE(T, TEMPLATE(poly_scalar_mul, T)) (rop + len, op + 1, len - 1,
op + len - 1, ctx);
for (i = 1; i < len - 1; i++)
_TEMPLATE(T, TEMPLATE(poly_scalar_addmul, T)) (rop + i + 1, op + 1,
i - 1, op + i, ctx);
for (i = 1; i < 2 * len - 2; i++)
TEMPLATE(T, add) (rop + i, rop + i, rop + i, ctx);
for (i = 1; i < len - 1; i++)
{
TEMPLATE(T, sqr) (t, op + i, ctx);
TEMPLATE(T, add) (rop + 2 * i, rop + 2 * i, t, ctx);
}
TEMPLATE(T, clear) (t, ctx);
}
}
void
TEMPLATE(T, poly_sqr_classical) (TEMPLATE(T, poly_t) rop,
const TEMPLATE(T, poly_t) op,
const TEMPLATE(T, ctx_t) ctx)
{
const slong len = 2 * op->length - 1;
if (op->length == 0)
{
TEMPLATE(T, poly_zero) (rop, ctx);
return;
}
if (rop == op)
{
TEMPLATE(T, poly_t) t;
TEMPLATE(T, poly_init2) (t, len, ctx);
_TEMPLATE(T, poly_sqr_classical) (t->coeffs, op->coeffs, op->length,
ctx);
TEMPLATE(T, poly_swap) (rop, t, ctx);
TEMPLATE(T, poly_clear) (t, ctx);
}
else
{
TEMPLATE(T, poly_fit_length) (rop, len, ctx);
_TEMPLATE(T, poly_sqr_classical) (rop->coeffs, op->coeffs, op->length,
ctx);
}
_TEMPLATE(T, poly_set_length) (rop, len, ctx);
}
#endif