cannam@127: /*
cannam@127:  * Copyright (c) 2003, 2007-14 Matteo Frigo
cannam@127:  * Copyright (c) 2003, 2007-14 Massachusetts Institute of Technology
cannam@127:  *
cannam@127:  * This program is free software; you can redistribute it and/or modify
cannam@127:  * it under the terms of the GNU General Public License as published by
cannam@127:  * the Free Software Foundation; either version 2 of the License, or
cannam@127:  * (at your option) any later version.
cannam@127:  *
cannam@127:  * This program is distributed in the hope that it will be useful,
cannam@127:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
cannam@127:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
cannam@127:  * GNU General Public License for more details.
cannam@127:  *
cannam@127:  * You should have received a copy of the GNU General Public License
cannam@127:  * along with this program; if not, write to the Free Software
cannam@127:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
cannam@127:  *
cannam@127:  */
cannam@127: 
cannam@127: /* out of place copy routines for pairs of isomorphic 2D arrays */
cannam@127: #include "ifftw.h"
cannam@127: 
cannam@127: void X(cpy2d_pair)(R *I0, R *I1, R *O0, R *O1,
cannam@127: 		   INT n0, INT is0, INT os0,
cannam@127: 		   INT n1, INT is1, INT os1)
cannam@127: {
cannam@127:      INT i0, i1;
cannam@127: 
cannam@127:      for (i1 = 0; i1 < n1; ++i1)
cannam@127: 	  for (i0 = 0; i0 < n0; ++i0) {
cannam@127: 	       R x0 = I0[i0 * is0 + i1 * is1];
cannam@127: 	       R x1 = I1[i0 * is0 + i1 * is1];
cannam@127: 	       O0[i0 * os0 + i1 * os1] = x0;
cannam@127: 	       O1[i0 * os0 + i1 * os1] = x1;
cannam@127: 	  }
cannam@127: }
cannam@127: 
cannam@127: void X(zero1d_pair)(R *O0, R *O1, INT n0, INT os0)
cannam@127: {
cannam@127:      INT i0;
cannam@127:      for (i0 = 0; i0 < n0; ++i0) {
cannam@127:           O0[i0 * os0] = 0;
cannam@127:           O1[i0 * os0] = 0;
cannam@127:      }
cannam@127: }
cannam@127: 
cannam@127: /* like cpy2d_pair, but read input contiguously if possible */
cannam@127: void X(cpy2d_pair_ci)(R *I0, R *I1, R *O0, R *O1,
cannam@127: 		      INT n0, INT is0, INT os0,
cannam@127: 		      INT n1, INT is1, INT os1)
cannam@127: {
cannam@127:      if (IABS(is0) < IABS(is1))	/* inner loop is for n0 */
cannam@127: 	  X(cpy2d_pair) (I0, I1, O0, O1, n0, is0, os0, n1, is1, os1);
cannam@127:      else
cannam@127: 	  X(cpy2d_pair) (I0, I1, O0, O1, n1, is1, os1, n0, is0, os0);
cannam@127: }
cannam@127: 
cannam@127: /* like cpy2d_pair, but write output contiguously if possible */
cannam@127: void X(cpy2d_pair_co)(R *I0, R *I1, R *O0, R *O1,
cannam@127: 		      INT n0, INT is0, INT os0,
cannam@127: 		      INT n1, INT is1, INT os1)
cannam@127: {
cannam@127:      if (IABS(os0) < IABS(os1))	/* inner loop is for n0 */
cannam@127: 	  X(cpy2d_pair) (I0, I1, O0, O1, n0, is0, os0, n1, is1, os1);
cannam@127:      else
cannam@127: 	  X(cpy2d_pair) (I0, I1, O0, O1, n1, is1, os1, n0, is0, os0);
cannam@127: }