diff src/fftw-3.3.3/dft/dftw-directsq.c @ 10:37bf6b4a2645

Add FFTW3

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/fftw-3.3.3/dft/dftw-directsq.c	Wed Mar 20 15:35:50 2013 +0000
@@ -0,0 +1,162 @@
+/*
+ * 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
+ *
+ */
+
+
+#include "ct.h"
+
+typedef struct {
+     ct_solver super;
+     const ct_desc *desc;
+     kdftwsq k;
+} S;
+
+typedef struct {
+     plan_dftw super;
+     kdftwsq k;
+     INT r;
+     stride rs, vs;
+     INT m, ms, v, mb, me;
+     twid *td;
+     const S *slv;
+} P;
+
+
+static void apply(const plan *ego_, R *rio, R *iio)
+{
+     const P *ego = (const P *) ego_;
+     INT mb = ego->mb, ms = ego->ms;
+     ego->k(rio + mb*ms, iio + mb*ms, ego->td->W, ego->rs, ego->vs,
+	    mb, ego->me, ms);
+}
+
+static void awake(plan *ego_, enum wakefulness wakefulness)
+{
+     P *ego = (P *) ego_;
+
+     X(twiddle_awake)(wakefulness, &ego->td, ego->slv->desc->tw,
+		      ego->r * ego->m, ego->r, ego->m);
+}
+
+static void destroy(plan *ego_)
+{
+     P *ego = (P *) ego_;
+     X(stride_destroy)(ego->rs);
+     X(stride_destroy)(ego->vs);
+}
+
+static void print(const plan *ego_, printer *p)
+{
+     const P *ego = (const P *) ego_;
+     const S *slv = ego->slv;
+     const ct_desc *e = slv->desc;
+
+     p->print(p, "(dftw-directsq-%D/%D%v \"%s\")",
+	      ego->r, X(twiddle_length)(ego->r, e->tw), ego->v, e->nam);
+}
+
+static int applicable(const S *ego,
+		      INT r, INT irs, INT ors,
+		      INT m, INT ms,
+		      INT v, INT ivs, INT ovs,
+		      INT mb, INT me,
+		      R *rio, R *iio,
+		      const planner *plnr)
+{
+     const ct_desc *e = ego->desc;
+     UNUSED(v);
+
+     return (
+	  1
+	  && r == e->radix
+
+	  /* transpose r, v */
+	  && r == v
+	  && irs == ovs
+	  && ivs == ors
+
+	  /* check for alignment/vector length restrictions */
+	  && e->genus->okp(e, rio, iio, irs, ivs, m, mb, me, ms, plnr)
+
+	  );
+}
+
+static plan *mkcldw(const ct_solver *ego_,
+		    INT r, INT irs, INT ors,
+		    INT m, INT ms,
+		    INT v, INT ivs, INT ovs,
+		    INT mstart, INT mcount,
+		    R *rio, R *iio,
+		    planner *plnr)
+{
+     const S *ego = (const S *) ego_;
+     P *pln;
+     const ct_desc *e = ego->desc;
+
+     static const plan_adt padt = {
+	  0, awake, print, destroy
+     };
+
+     A(mstart >= 0 && mstart + mcount <= m);
+     if (!applicable(ego,
+		     r, irs, ors, m, ms, v, ivs, ovs, mstart, mstart + mcount,
+		     rio, iio, plnr))
+          return (plan *)0;
+
+     pln = MKPLAN_DFTW(P, &padt, apply);
+
+     pln->k = ego->k;
+     pln->rs = X(mkstride)(r, irs);
+     pln->vs = X(mkstride)(v, ivs);
+     pln->td = 0;
+     pln->r = r;
+     pln->m = m;
+     pln->ms = ms;
+     pln->v = v;
+     pln->mb = mstart;
+     pln->me = mstart + mcount;
+     pln->slv = ego;
+
+     X(ops_zero)(&pln->super.super.ops);
+     X(ops_madd2)(mcount/e->genus->vl, &e->ops, &pln->super.super.ops);
+
+     return &(pln->super.super);
+}
+
+static void regone(planner *plnr, kdftwsq codelet,
+		   const ct_desc *desc, int dec)
+{
+     S *slv = (S *)X(mksolver_ct)(sizeof(S), desc->radix, dec, mkcldw, 0);
+     slv->k = codelet;
+     slv->desc = desc;
+     REGISTER_SOLVER(plnr, &(slv->super.super));
+     if (X(mksolver_ct_hook)) {
+	  slv = (S *)X(mksolver_ct_hook)(sizeof(S), desc->radix, dec,
+					 mkcldw, 0);
+	  slv->k = codelet;
+	  slv->desc = desc;
+	  REGISTER_SOLVER(plnr, &(slv->super.super));
+     }
+}
+
+void X(regsolver_ct_directwsq)(planner *plnr, kdftwsq codelet,
+			       const ct_desc *desc, int dec)
+{
+     regone(plnr, codelet, desc, dec+TRANSPOSE);
+}