First commit - moving from LuaForge to SourceForge

1 files changed, 194 insertions, 0 deletions

diff --git a/src/fftw3/rdft/rrank0.c b/src/fftw3/rdft/rrank0.c
new file mode 100644
index 0000000..4e212ab
--- /dev/null
+++ b/src/fftw3/rdft/rrank0.c
@@ -0,0 +1,194 @@
+/*
+ * Copyright (c) 2003 Matteo Frigo
+ * Copyright (c) 2003 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+
+/* $Id: rrank0.c,v 1.1 2008/10/17 06:11:29 scuri Exp $ */
+
+/* plans for rank-0 RDFTs (copy operations) */
+
+#include "rdft.h"
+
+#ifdef HAVE_STRING_H
+#include <string.h>		/* for memcpy() */
+#endif
+
+
+typedef struct {
+     rdftapply apply;
+     int (*applicable)(const problem_rdft *p);
+     const char *nam;
+} rnk0adt;
+
+typedef struct {
+     solver super;
+     const rnk0adt *adt;
+} S;
+
+typedef struct {
+     plan_rdft super;
+     int vl;
+     int ivs, ovs;
+     const S *slv;
+} P;
+
+/* generic applicability function */
+static int applicable(const solver *ego_, const problem *p_)
+{
+     if (RDFTP(p_)) {
+          const S *ego = (const S *) ego_;
+          const problem_rdft *p = (const problem_rdft *) p_;
+          return (1
+		  && p->I != p->O
+                  && p->sz->rnk == 0
+                  && ego->adt->applicable(p)
+	       );
+     }
+     return 0;
+}
+
+/*-----------------------------------------------------------------------*/
+/* rank-0 rdft, vl == 1: just a copy */
+static void apply_1(const plan *ego_, R *I, R *O)
+{
+     UNUSED(ego_);
+     *O = *I;
+}
+
+static int applicable_1(const problem_rdft *p)
+{
+     return (p->vecsz->rnk == 0);
+}
+
+static const rnk0adt adt_cpy1 =
+{
+     apply_1, applicable_1, "rdft-rank0-cpy1"
+};
+
+/*-----------------------------------------------------------------------*/
+/* rank-0 rdft, vl > 1: just a copy loop (unroll 4) */
+static void apply_vec(const plan *ego_, R *I, R *O)
+{
+     const P *ego = (const P *) ego_;
+     int i, vl = ego->vl;
+     int ivs = ego->ivs, ovs = ego->ovs;
+
+     for (i = 4; i <= vl; i += 4) {
+          R r0, r1, r2, r3;
+          r0 = *I; I += ivs;
+          r1 = *I; I += ivs;
+          r2 = *I; I += ivs;
+          r3 = *I; I += ivs;
+          *O = r0; O += ovs;
+          *O = r1; O += ovs;
+          *O = r2; O += ovs;
+	  *O = r3; O += ovs;
+     }
+     for (; i < vl + 4; ++i) {
+          R r0;
+          r0 = *I; I += ivs;
+          *O = r0; O += ovs;
+     }
+}
+
+static int applicable_vec(const problem_rdft *p)
+{
+     return (p->vecsz->rnk == 1 && p->O != p->I);
+}
+
+static const rnk0adt adt_vec =
+{
+     apply_vec, applicable_vec, "rdft-rank0-vec"
+};
+
+/*-----------------------------------------------------------------------*/
+/* rank-0 rdft, vl > 1, [io]vs == 1, using memcpy */
+static void apply_io1(const plan *ego_, R *I, R *O)
+{
+     const P *ego = (const P *) ego_;
+     int vl = ego->vl;
+     memcpy(O, I, vl * sizeof(R));
+}
+
+static int applicable_io1(const problem_rdft *p)
+{
+     return (1
+             && applicable_vec(p)
+             && p->vecsz->dims[0].is == 1
+             && p->vecsz->dims[0].os == 1
+	  );
+}
+
+static const rnk0adt adt_io1 =
+{
+     apply_io1, applicable_io1, "rdft-rank0-io1-memcpy"
+};
+
+/*-----------------------------------------------------------------------*/
+/* generic stuff: */
+
+static void print(const plan *ego_, printer *p)
+{
+     const P *ego = (const P *) ego_;
+     p->print(p, "(%s%v)", ego->slv->adt->nam, ego->vl);
+}
+
+static plan *mkplan(const solver *ego_, const problem *p_, planner *plnr)
+{
+     const S *ego = (const S *) ego_;
+     const problem_rdft *p;
+     P *pln;
+
+     static const plan_adt padt = {
+	  X(rdft_solve), X(null_awake), print, X(plan_null_destroy)
+     };
+
+     UNUSED(plnr);
+
+     if (!applicable(ego_, p_))
+          return (plan *) 0;
+
+     p = (const problem_rdft *) p_;
+     pln = MKPLAN_RDFT(P, &padt, ego->adt->apply);
+
+     X(tensor_tornk1)(p->vecsz, &pln->vl, &pln->ivs, &pln->ovs);
+     pln->slv = ego;
+
+     /* vl loads, vl stores */
+     X(ops_other)(2 * pln->vl, &pln->super.super.ops);
+     return &(pln->super.super);
+}
+
+static solver *mksolver(const rnk0adt *adt)
+{
+     static const solver_adt sadt = { mkplan };
+     S *slv = MKSOLVER(S, &sadt);
+     slv->adt = adt;
+     return &(slv->super);
+}
+
+void X(rdft_rank0_register)(planner *p)
+{
+     unsigned i;
+     static const rnk0adt *const adts[] = {
+	  &adt_cpy1, &adt_vec, &adt_io1
+     };
+
+     for (i = 0; i < sizeof(adts) / sizeof(adts[0]); ++i)
+          REGISTER_SOLVER(p, mksolver(adts[i]));
+}