105 lines
3.4 KiB
C
105 lines
3.4 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) 2008, 2009 William Hart
|
||
|
|
Copyright (C) 2012 Sebastian Pancratz
|
||
|
|
Copyright (C) 2013 Mike Hansen
|
||
|
|
|
||
|
|
******************************************************************************/
|
||
|
|
|
||
|
|
|
||
|
|
#ifdef T
|
||
|
|
|
||
|
|
#include "templates.h"
|
||
|
|
|
||
|
|
void
|
||
|
|
_TEMPLATE(T, poly_mullow_classical) (
|
||
|
|
TEMPLATE(T, struct) * rop,
|
||
|
|
const TEMPLATE(T, struct) * op1, slong len1,
|
||
|
|
const TEMPLATE(T, struct) * op2, slong len2,
|
||
|
|
slong n, const TEMPLATE(T, ctx_t) ctx)
|
||
|
|
{
|
||
|
|
if ((len1 == 1 && len2 == 1) || n == 1)
|
||
|
|
{
|
||
|
|
TEMPLATE(T, mul) (rop, op1, op2, ctx);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
slong i;
|
||
|
|
|
||
|
|
_TEMPLATE3(T, poly_scalar_mul, T)(rop, op1, FLINT_MIN(len1, n),
|
||
|
|
op2, ctx);
|
||
|
|
|
||
|
|
if (n > len1)
|
||
|
|
_TEMPLATE3(T, poly_scalar_mul, T) (rop + len1,
|
||
|
|
op2 + 1, n - len1,
|
||
|
|
op1 + len1 - 1, ctx);
|
||
|
|
|
||
|
|
for (i = 0; i < FLINT_MIN(len1, n) - 1; i++)
|
||
|
|
_TEMPLATE3(T, poly_scalar_addmul, T) (rop + i + 1, op2 + 1,
|
||
|
|
FLINT_MIN(len2, n - i) - 1,
|
||
|
|
op1 + i, ctx);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void
|
||
|
|
TEMPLATE(T, poly_mullow_classical) (TEMPLATE(T, poly_t) rop,
|
||
|
|
const TEMPLATE(T, poly_t) op1,
|
||
|
|
const TEMPLATE(T, poly_t) op2, slong n,
|
||
|
|
const TEMPLATE(T, ctx_t) ctx)
|
||
|
|
{
|
||
|
|
const slong len = op1->length + op2->length - 1;
|
||
|
|
|
||
|
|
if (op1->length == 0 || op2->length == 0 || n == 0)
|
||
|
|
{
|
||
|
|
TEMPLATE(T, poly_zero) (rop, ctx);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (n > len)
|
||
|
|
n = len;
|
||
|
|
|
||
|
|
if (rop == op1 || rop == op2)
|
||
|
|
{
|
||
|
|
TEMPLATE(T, poly_t) t;
|
||
|
|
|
||
|
|
TEMPLATE(T, poly_init2) (t, n, ctx);
|
||
|
|
_TEMPLATE(T, poly_mullow_classical) (t->coeffs, op1->coeffs,
|
||
|
|
op1->length, op2->coeffs,
|
||
|
|
op2->length, n, ctx);
|
||
|
|
TEMPLATE(T, poly_swap) (rop, t, ctx);
|
||
|
|
TEMPLATE(T, poly_clear) (t, ctx);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
TEMPLATE(T, poly_fit_length) (rop, n, ctx);
|
||
|
|
_TEMPLATE(T, poly_mullow_classical) (rop->coeffs, op1->coeffs,
|
||
|
|
op1->length, op2->coeffs,
|
||
|
|
op2->length, n, ctx);
|
||
|
|
}
|
||
|
|
|
||
|
|
_TEMPLATE(T, poly_set_length) (rop, n, ctx);
|
||
|
|
_TEMPLATE(T, poly_normalise) (rop, ctx);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
#endif
|