diff src/fftw-3.3.3/threads/rdft-vrank-geq1.c @ 10:37bf6b4a2645

Add FFTW3

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/fftw-3.3.3/threads/rdft-vrank-geq1.c	Wed Mar 20 15:35:50 2013 +0000
@@ -0,0 +1,224 @@
+/*
+ * 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 "threads.h"
+
+typedef struct {
+     solver super;
+     int vecloop_dim;
+     const int *buddies;
+     int nbuddies;
+} S;
+
+typedef struct {
+     plan_rdft super;
+     plan **cldrn;
+     INT its, ots;
+     int nthr;
+     const S *solver;
+} P;
+
+typedef struct {
+     INT its, ots;
+     R *I, *O;
+     plan **cldrn;
+} PD;
+
+static void *spawn_apply(spawn_data *d)
+{
+     PD *ego = (PD *) d->data;
+     int thr_num = d->thr_num;
+     plan_rdft *cld = (plan_rdft *) ego->cldrn[d->thr_num];
+
+     cld->apply((plan *) cld,
+		ego->I + thr_num * ego->its, ego->O + thr_num * ego->ots);
+     return 0;
+}
+
+static void apply(const plan *ego_, R *I, R *O)
+{
+     const P *ego = (const P *) ego_;
+     PD d;
+
+     d.its = ego->its;
+     d.ots = ego->ots;
+     d.cldrn = ego->cldrn;
+     d.I = I; d.O = O;
+
+     X(spawn_loop)(ego->nthr, ego->nthr, spawn_apply, (void*) &d);
+}
+
+static void awake(plan *ego_, enum wakefulness wakefulness)
+{
+     P *ego = (P *) ego_;
+     int i;
+     for (i = 0; i < ego->nthr; ++i)
+	  X(plan_awake)(ego->cldrn[i], wakefulness);
+}
+
+static void destroy(plan *ego_)
+{
+     P *ego = (P *) ego_;
+     int i;
+     for (i = 0; i < ego->nthr; ++i)
+	  X(plan_destroy_internal)(ego->cldrn[i]);
+     X(ifree)(ego->cldrn);
+}
+
+static void print(const plan *ego_, printer *p)
+{
+     const P *ego = (const P *) ego_;
+     const S *s = ego->solver;
+     int i;
+     p->print(p, "(rdft-thr-vrank>=1-x%d/%d", ego->nthr, s->vecloop_dim);
+     for (i = 0; i < ego->nthr; ++i)
+	  if (i == 0 || (ego->cldrn[i] != ego->cldrn[i-1] &&
+			 (i <= 1 || ego->cldrn[i] != ego->cldrn[i-2])))
+	       p->print(p, "%(%p%)", ego->cldrn[i]);
+     p->putchr(p, ')');
+}
+
+static int pickdim(const S *ego, const tensor *vecsz, int oop, int *dp)
+{
+     return X(pickdim)(ego->vecloop_dim, ego->buddies, ego->nbuddies,
+		       vecsz, oop, dp);
+}
+
+static int applicable0(const solver *ego_, const problem *p_,
+		       const planner *plnr, int *dp)
+{
+     const S *ego = (const S *) ego_;
+     const problem_rdft *p = (const problem_rdft *) p_;
+
+     return (1
+	     && plnr->nthr > 1
+	     && FINITE_RNK(p->vecsz->rnk)
+	     && p->vecsz->rnk > 0
+	     && pickdim(ego, p->vecsz, p->I != p->O, dp)
+	  );
+}
+
+static int applicable(const solver *ego_, const problem *p_,
+		      const planner *plnr, int *dp)
+{
+     const S *ego = (const S *)ego_;
+
+     if (!applicable0(ego_, p_, plnr, dp)) return 0;
+
+     /* fftw2 behavior */
+     if (NO_VRANK_SPLITSP(plnr) && (ego->vecloop_dim != ego->buddies[0]))
+	  return 0;
+
+     return 1;
+}
+
+static plan *mkplan(const solver *ego_, const problem *p_, planner *plnr)
+{
+     const S *ego = (const S *) ego_;
+     const problem_rdft *p;
+     P *pln;
+     problem *cldp;
+     int vdim;
+     iodim *d;
+     plan **cldrn = (plan **) 0;
+     int i, nthr;
+     INT its, ots, block_size;
+     tensor *vecsz;
+
+     static const plan_adt padt = {
+	  X(rdft_solve), awake, print, destroy
+     };
+
+     if (!applicable(ego_, p_, plnr, &vdim))
+          return (plan *) 0;
+     p = (const problem_rdft *) p_;
+
+     d = p->vecsz->dims + vdim;
+
+     block_size = (d->n + plnr->nthr - 1) / plnr->nthr;
+     nthr = (int)((d->n + block_size - 1) / block_size);
+     plnr->nthr = (plnr->nthr + nthr - 1) / nthr;
+     its = d->is * block_size;
+     ots = d->os * block_size;
+
+     cldrn = (plan **)MALLOC(sizeof(plan *) * nthr, PLANS);
+     for (i = 0; i < nthr; ++i) cldrn[i] = (plan *) 0;
+     
+     vecsz = X(tensor_copy)(p->vecsz);
+     for (i = 0; i < nthr; ++i) {
+	  vecsz->dims[vdim].n =
+	       (i == nthr - 1) ? (d->n - i*block_size) : block_size;
+	  cldp = X(mkproblem_rdft)(p->sz, vecsz,
+				   p->I + i*its, p->O + i*ots, p->kind);
+	  cldrn[i] = X(mkplan_d)(plnr, cldp);
+	  if (!cldrn[i]) goto nada;
+     }
+     X(tensor_destroy)(vecsz);
+
+     pln = MKPLAN_RDFT(P, &padt, apply);
+
+     pln->cldrn = cldrn;
+     pln->its = its;
+     pln->ots = ots;
+     pln->nthr = nthr;
+
+     pln->solver = ego;
+     X(ops_zero)(&pln->super.super.ops);
+     pln->super.super.pcost = 0;
+     for (i = 0; i < nthr; ++i) {
+	  X(ops_add2)(&cldrn[i]->ops, &pln->super.super.ops);
+	  pln->super.super.pcost += cldrn[i]->pcost;
+     }
+
+     return &(pln->super.super);
+
+ nada:
+     if (cldrn) {
+	  for (i = 0; i < nthr; ++i)
+	       X(plan_destroy_internal)(cldrn[i]);
+	  X(ifree)(cldrn);
+     }
+     X(tensor_destroy)(vecsz);
+     return (plan *) 0;
+}
+
+static solver *mksolver(int vecloop_dim, const int *buddies, int nbuddies)
+{
+     static const solver_adt sadt = { PROBLEM_RDFT, mkplan, 0 };
+     S *slv = MKSOLVER(S, &sadt);
+     slv->vecloop_dim = vecloop_dim;
+     slv->buddies = buddies;
+     slv->nbuddies = nbuddies;
+     return &(slv->super);
+}
+
+void X(rdft_thr_vrank_geq1_register)(planner *p)
+{
+     int i;
+
+     /* FIXME: Should we try other vecloop_dim values? */
+     static const int buddies[] = { 1, -1 };
+
+     const int nbuddies = (int)(sizeof(buddies) / sizeof(buddies[0]));
+
+     for (i = 0; i < nbuddies; ++i)
+          REGISTER_SOLVER(p, mksolver(buddies[i], buddies, nbuddies));
+}