1 /*
2 * Copyright (c) 2003, 2007-14 Matteo Frigo
3 * Copyright (c) 2003, 2007-14 Massachusetts Institute of Technology
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18 *
19 */
20
21 #include "rdft/rdft.h"
22
23 /* Deal with annoyance because the tensor (is,os) applies to
24 (r,rio/iio) for R2HC and vice-versa for HC2R. We originally had
25 (is,os) always apply to (r,rio/iio), but this causes other
26 headaches with the tensor functions. */
X(rdft2_strides)27 void X(rdft2_strides)(rdft_kind kind, const iodim *d, INT *rs, INT *cs)
28 {
29 if (kind == R2HC) {
30 *rs = d->is;
31 *cs = d->os;
32 }
33 else {
34 A(kind == HC2R);
35 *rs = d->os;
36 *cs = d->is;
37 }
38 }
39