cannam@95: /*
cannam@95:  * Copyright (c) 2003, 2007-11 Matteo Frigo
cannam@95:  * Copyright (c) 2003, 2007-11 Massachusetts Institute of Technology
cannam@95:  *
cannam@95:  * This program is free software; you can redistribute it and/or modify
cannam@95:  * it under the terms of the GNU General Public License as published by
cannam@95:  * the Free Software Foundation; either version 2 of the License, or
cannam@95:  * (at your option) any later version.
cannam@95:  *
cannam@95:  * This program is distributed in the hope that it will be useful,
cannam@95:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
cannam@95:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
cannam@95:  * GNU General Public License for more details.
cannam@95:  *
cannam@95:  * You should have received a copy of the GNU General Public License
cannam@95:  * along with this program; if not, write to the Free Software
cannam@95:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
cannam@95:  *
cannam@95:  */
cannam@95: 
cannam@95: /* out of place 1D copy routine */
cannam@95: #include "ifftw.h"
cannam@95: 
cannam@95: void X(cpy1d)(R *I, R *O, INT n0, INT is0, INT os0, INT vl)
cannam@95: {
cannam@95:      INT i0, v;
cannam@95: 
cannam@95:      A(I != O);
cannam@95:      switch (vl) {
cannam@95: 	 case 1:
cannam@95: 	      if ((n0 & 1) || is0 != 1 || os0 != 1) {
cannam@95: 		   for (; n0 > 0; --n0, I += is0, O += os0)
cannam@95: 			*O = *I;
cannam@95: 		   break;
cannam@95: 	      }
cannam@95: 	      n0 /= 2; is0 = 2; os0 = 2;
cannam@95: 	      /* fall through */
cannam@95: 	 case 2:
cannam@95: 	      if ((n0 & 1) || is0 != 2 || os0 != 2) {
cannam@95: 		   for (; n0 > 0; --n0, I += is0, O += os0) {
cannam@95: 			R x0 = I[0];
cannam@95: 			R x1 = I[1];
cannam@95: 			O[0] = x0;
cannam@95: 			O[1] = x1;
cannam@95: 		   }
cannam@95: 		   break;
cannam@95: 	      }
cannam@95: 	      n0 /= 2; is0 = 4; os0 = 4;
cannam@95: 	      /* fall through */
cannam@95: 	 case 4:
cannam@95: 	      for (; n0 > 0; --n0, I += is0, O += os0) {
cannam@95: 		   R x0 = I[0];
cannam@95: 		   R x1 = I[1];
cannam@95: 		   R x2 = I[2];
cannam@95: 		   R x3 = I[3];
cannam@95: 		   O[0] = x0;
cannam@95: 		   O[1] = x1;
cannam@95: 		   O[2] = x2;
cannam@95: 		   O[3] = x3;
cannam@95: 	      }
cannam@95: 	      break;
cannam@95: 	 default:
cannam@95: 	      for (i0 = 0; i0 < n0; ++i0)
cannam@95: 		   for (v = 0; v < vl; ++v) {
cannam@95: 			R x0 = I[i0 * is0 + v];
cannam@95: 			O[i0 * os0 + v] = x0;
cannam@95: 		   }
cannam@95: 	      break;
cannam@95:      }
cannam@95: }