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/*
* Copyright (c) 2003, 2006 Matteo Frigo
* Copyright (c) 2003, 2006 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
/* out of place copy routines for pairs of isomorphic 2D arrays */
#include "ifftw.h"
void X(cpy2d_pair)(R *I0, R *I1, R *O0, R *O1,
INT n0, INT is0, INT os0,
INT n1, INT is1, INT os1)
{
INT i0, i1;
for (i1 = 0; i1 < n1; ++i1)
for (i0 = 0; i0 < n0; ++i0) {
R x0 = I0[i0 * is0 + i1 * is1];
R x1 = I1[i0 * is0 + i1 * is1];
O0[i0 * os0 + i1 * os1] = x0;
O1[i0 * os0 + i1 * os1] = x1;
}
}
/* like cpy2d_pair, but read input contiguously if possible */
void X(cpy2d_pair_ci)(R *I0, R *I1, R *O0, R *O1,
INT n0, INT is0, INT os0,
INT n1, INT is1, INT os1)
{
if (IABS(is0) < IABS(is1)) /* inner loop is for n0 */
X(cpy2d_pair) (I0, I1, O0, O1, n0, is0, os0, n1, is1, os1);
else
X(cpy2d_pair) (I0, I1, O0, O1, n1, is1, os1, n0, is0, os0);
}
/* like cpy2d_pair, but write output contiguously if possible */
void X(cpy2d_pair_co)(R *I0, R *I1, R *O0, R *O1,
INT n0, INT is0, INT os0,
INT n1, INT is1, INT os1)
{
if (IABS(os0) < IABS(os1)) /* inner loop is for n0 */
X(cpy2d_pair) (I0, I1, O0, O1, n0, is0, os0, n1, is1, os1);
else
X(cpy2d_pair) (I0, I1, O0, O1, n1, is1, os1, n0, is0, os0);
}
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