comparison src/fftw-3.3.3/kernel/ct.c @ 10:37bf6b4a2645

Add FFTW3

+/*
+ * Copyright (c) 2003, 2007-11 Matteo Frigo
+ * Copyright (c) 2003, 2007-11 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
+ *
+ */
+
+/* common routines for Cooley-Tukey algorithms */
+
+#include "ifftw.h"
+
+#define POW2P(n) (((n) > 0) && (((n) & ((n) - 1)) == 0))
+
+/* TRUE if radix-r is ugly for size n */
+int X(ct_uglyp)(INT min_n, INT v, INT n, INT r)
+{
+     return (n <= min_n) || (POW2P(n) && (v * (n / r)) <= 4);
+}