mirror of
https://github.com/vale981/arb
synced 2025-03-05 09:21:38 -05:00
46 lines
1.1 KiB
C
46 lines
1.1 KiB
C
/*
|
|
Copyright (C) 2021 Fredrik Johansson
|
|
|
|
This file is part of Arb.
|
|
|
|
Arb 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 2.1 of the License, or
|
|
(at your option) any later version. See <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "arb_hypgeom.h"
|
|
|
|
void
|
|
arb_hypgeom_rising_ui_rec(arb_t res, const arb_t x, ulong n, slong prec)
|
|
{
|
|
if (n <= 1)
|
|
{
|
|
if (n == 0)
|
|
arb_one(res);
|
|
else
|
|
arb_set_round(res, x, prec);
|
|
return;
|
|
}
|
|
|
|
if (n == 2 && prec <= 1024)
|
|
{
|
|
if (res != x)
|
|
arb_set(res, x);
|
|
arb_addmul(res, x, x, prec);
|
|
return;
|
|
}
|
|
|
|
if ((prec < 512 && n <= 20) || (n <= FLINT_MIN(80, 6000 / prec)))
|
|
{
|
|
arb_hypgeom_rising_ui_forward(res, x, n, prec);
|
|
}
|
|
else
|
|
{
|
|
if (n >= 20 && arb_bits(x) < prec / 8)
|
|
arb_hypgeom_rising_ui_bs(res, x, n, prec);
|
|
else
|
|
arb_hypgeom_rising_ui_rs(res, x, n, 0, prec);
|
|
}
|
|
}
|
|
|