comparison src/fftw-3.3.8/rdft/direct-r2r.c @ 167:bd3cc4d1df30

Add FFTW 3.3.8 source, and a Linux build

+/*
+ * 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
+ *
+ */
+
+
+/* direct RDFT solver, using r2r codelets */
+
+#include "rdft/rdft.h"
+
+typedef struct {
+     solver super;
+     const kr2r_desc *desc;
+     kr2r k;
+} S;
+
+typedef struct {
+     plan_rdft super;
+
+     INT vl, ivs, ovs;
+     stride is, os;
+     kr2r k;
+     const S *slv;
+} P;
+
+static void apply(const plan *ego_, R *I, R *O)
+{
+     const P *ego = (const P *) ego_;
+     ASSERT_ALIGNED_DOUBLE;
+     ego->k(I, O, ego->is, ego->os, ego->vl, ego->ivs, ego->ovs);
+}
+
+static void destroy(plan *ego_)
+{
+     P *ego = (P *) ego_;
+     X(stride_destroy)(ego->is);
+     X(stride_destroy)(ego->os);
+}
+
+static void print(const plan *ego_, printer *p)
+{
+     const P *ego = (const P *) ego_;
+     const S *s = ego->slv;
+
+     p->print(p, "(rdft-%s-direct-r2r-%D%v \"%s\")", 
+	      X(rdft_kind_str)(s->desc->kind), s->desc->n,
+	      ego->vl, s->desc->nam);
+}
+
+static int applicable(const solver *ego_, const problem *p_)
+{
+     const S *ego = (const S *) ego_;
+     const problem_rdft *p = (const problem_rdft *) p_;
+     INT vl;
+     INT ivs, ovs;
+
+     return (
+	  1
+	  && p->sz->rnk == 1
+	  && p->vecsz->rnk <= 1
+	  && p->sz->dims[0].n == ego->desc->n
+	  && p->kind[0] == ego->desc->kind
+
+	  /* check strides etc */
+	  && X(tensor_tornk1)(p->vecsz, &vl, &ivs, &ovs)
+
+	  && (0
+	      /* can operate out-of-place */
+	      || p->I != p->O
+
+	      /* computing one transform */
+	      || vl == 1
+
+	      /* can operate in-place as long as strides are the same */
+	      || X(tensor_inplace_strides2)(p->sz, p->vecsz)
+	       )
+	  );
+}
+
+static plan *mkplan(const solver *ego_, const problem *p_, planner *plnr)
+{
+     const S *ego = (const S *) ego_;
+     P *pln;
+     const problem_rdft *p;
+     iodim *d;
+
+     static const plan_adt padt = {
+	  X(rdft_solve), X(null_awake), print, destroy
+     };
+
+     UNUSED(plnr);
+
+     if (!applicable(ego_, p_))
+          return (plan *)0;
+
+     p = (const problem_rdft *) p_;
+
+
+     pln = MKPLAN_RDFT(P, &padt, apply);
+
+     d = p->sz->dims;
+
+     pln->k = ego->k;
+
+     pln->is = X(mkstride)(d->n, d->is);
+     pln->os = X(mkstride)(d->n, d->os);
+
+     X(tensor_tornk1)(p->vecsz, &pln->vl, &pln->ivs, &pln->ovs);
+
+     pln->slv = ego;
+     X(ops_zero)(&pln->super.super.ops);
+     X(ops_madd2)(pln->vl / ego->desc->genus->vl,
+		  &ego->desc->ops,
+		  &pln->super.super.ops);
+
+     pln->super.super.could_prune_now_p = 1;
+
+     return &(pln->super.super);
+}
+
+/* constructor */
+solver *X(mksolver_rdft_r2r_direct)(kr2r k, const kr2r_desc *desc)
+{
+     static const solver_adt sadt = { PROBLEM_RDFT, mkplan, 0 };
+     S *slv = MKSOLVER(S, &sadt);
+     slv->k = k;
+     slv->desc = desc;
+     return &(slv->super);
+}
+