comparison src/fftw-3.3.5/kernel/cpy2d-pair.c @ 42:2cd0e3b3e1fd

Current fftw source

+/*
+ * Copyright (c) 2003, 2007-14 Matteo Frigo
+ * Copyright (c) 2003, 2007-14 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  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;
+	  }
+}
+
+void X(zero1d_pair)(R *O0, R *O1, INT n0, INT os0)
+{
+     INT i0;
+     for (i0 = 0; i0 < n0; ++i0) {
+          O0[i0 * os0] = 0;
+          O1[i0 * os0] = 0;
+     }
+}
+
+/* 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);
+}