Chris@82: /*
Chris@82:  * Copyright (c) 2003, 2007-14 Matteo Frigo
Chris@82:  * Copyright (c) 2003, 2007-14 Massachusetts Institute of Technology
Chris@82:  *
Chris@82:  * This program is free software; you can redistribute it and/or modify
Chris@82:  * it under the terms of the GNU General Public License as published by
Chris@82:  * the Free Software Foundation; either version 2 of the License, or
Chris@82:  * (at your option) any later version.
Chris@82:  *
Chris@82:  * This program is distributed in the hope that it will be useful,
Chris@82:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
Chris@82:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
Chris@82:  * GNU General Public License for more details.
Chris@82:  *
Chris@82:  * You should have received a copy of the GNU General Public License
Chris@82:  * along with this program; if not, write to the Free Software
Chris@82:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
Chris@82:  *
Chris@82:  */
Chris@82: 
Chris@82: /* out of place copy routines for pairs of isomorphic 2D arrays */
Chris@82: #include "kernel/ifftw.h"
Chris@82: 
Chris@82: void X(cpy2d_pair)(R *I0, R *I1, R *O0, R *O1,
Chris@82: 		   INT n0, INT is0, INT os0,
Chris@82: 		   INT n1, INT is1, INT os1)
Chris@82: {
Chris@82:      INT i0, i1;
Chris@82: 
Chris@82:      for (i1 = 0; i1 < n1; ++i1)
Chris@82: 	  for (i0 = 0; i0 < n0; ++i0) {
Chris@82: 	       R x0 = I0[i0 * is0 + i1 * is1];
Chris@82: 	       R x1 = I1[i0 * is0 + i1 * is1];
Chris@82: 	       O0[i0 * os0 + i1 * os1] = x0;
Chris@82: 	       O1[i0 * os0 + i1 * os1] = x1;
Chris@82: 	  }
Chris@82: }
Chris@82: 
Chris@82: void X(zero1d_pair)(R *O0, R *O1, INT n0, INT os0)
Chris@82: {
Chris@82:      INT i0;
Chris@82:      for (i0 = 0; i0 < n0; ++i0) {
Chris@82:           O0[i0 * os0] = 0;
Chris@82:           O1[i0 * os0] = 0;
Chris@82:      }
Chris@82: }
Chris@82: 
Chris@82: /* like cpy2d_pair, but read input contiguously if possible */
Chris@82: void X(cpy2d_pair_ci)(R *I0, R *I1, R *O0, R *O1,
Chris@82: 		      INT n0, INT is0, INT os0,
Chris@82: 		      INT n1, INT is1, INT os1)
Chris@82: {
Chris@82:      if (IABS(is0) < IABS(is1))	/* inner loop is for n0 */
Chris@82: 	  X(cpy2d_pair) (I0, I1, O0, O1, n0, is0, os0, n1, is1, os1);
Chris@82:      else
Chris@82: 	  X(cpy2d_pair) (I0, I1, O0, O1, n1, is1, os1, n0, is0, os0);
Chris@82: }
Chris@82: 
Chris@82: /* like cpy2d_pair, but write output contiguously if possible */
Chris@82: void X(cpy2d_pair_co)(R *I0, R *I1, R *O0, R *O1,
Chris@82: 		      INT n0, INT is0, INT os0,
Chris@82: 		      INT n1, INT is1, INT os1)
Chris@82: {
Chris@82:      if (IABS(os0) < IABS(os1))	/* inner loop is for n0 */
Chris@82: 	  X(cpy2d_pair) (I0, I1, O0, O1, n0, is0, os0, n1, is1, os1);
Chris@82:      else
Chris@82: 	  X(cpy2d_pair) (I0, I1, O0, O1, n1, is1, os1, n0, is0, os0);
Chris@82: }