mirror of
https://github.com/tildearrow/furnace.git
synced 2024-12-04 18:27:25 +00:00
32 lines
1.1 KiB
C
32 lines
1.1 KiB
C
|
/*
|
||
|
|
* Copyright (c) 2003, 2007-14 Matteo Frigo
|
||
|
|
* Copyright (c) 2003, 2007-14 Massachusetts Institute of Technology
|
||
|
|
*
|
||
|
|
* This program 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.
|
||
|
|
*
|
||
|
|
* This program 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 this program; if not, write to the Free Software
|
||
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* common routines for Cooley-Tukey algorithms */
|
||
|
|
|
||
|
|
#include "kernel/ifftw.h"
|
||
|
|
|
||
|
|
#define POW2P(n) (((n) > 0) && (((n) & ((n) - 1)) == 0))
|
||
|
|
|
||
|
|
/* TRUE if radix-r is ugly for size n */
|
||
|
|
int X(ct_uglyp)(INT min_n, INT v, INT n, INT r)
|
||
|
|
{
|
||
|
|
return (n <= min_n) || (POW2P(n) && (v * (n / r)) <= 4);
|
||
|
|
}
|