diff src/fftw-3.3.5/threads/ct.c @ 127:7867fa7e1b6b

Current fftw source

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/fftw-3.3.5/threads/ct.c	Tue Oct 18 13:40:26 2016 +0100
@@ -0,0 +1,271 @@
+/*
+ * 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
+ *
+ */
+
+
+#include "threads.h"
+
+typedef struct {
+     plan_dft super;
+     plan *cld;
+     plan **cldws;
+     int nthr;
+     INT r;
+} P;
+
+typedef struct {
+     plan **cldws;
+     R *r, *i;
+} PD;
+
+static void *spawn_apply(spawn_data *d)
+{
+     PD *ego = (PD *) d->data;
+     INT thr_num = d->thr_num;
+
+     plan_dftw *cldw = (plan_dftw *) (ego->cldws[thr_num]);
+     cldw->apply((plan *) cldw, ego->r, ego->i);
+     return 0;
+}
+
+static void apply_dit(const plan *ego_, R *ri, R *ii, R *ro, R *io)
+{
+     const P *ego = (const P *) ego_;
+     plan_dft *cld;
+
+     cld = (plan_dft *) ego->cld;
+     cld->apply(ego->cld, ri, ii, ro, io);
+
+     {
+	  PD d;
+
+	  d.r = ro; d.i = io;
+	  d.cldws = ego->cldws;
+
+	  X(spawn_loop)(ego->nthr, ego->nthr, spawn_apply, (void*)&d);
+     }
+}
+
+static void apply_dif(const plan *ego_, R *ri, R *ii, R *ro, R *io)
+{
+     const P *ego = (const P *) ego_;
+     plan_dft *cld;
+
+     {
+	  PD d;
+
+	  d.r = ri; d.i = ii;
+	  d.cldws = ego->cldws;
+
+	  X(spawn_loop)(ego->nthr, ego->nthr, spawn_apply, (void*)&d);
+     }
+
+     cld = (plan_dft *) ego->cld;
+     cld->apply(ego->cld, ri, ii, ro, io);
+}
+
+static void awake(plan *ego_, enum wakefulness wakefulness)
+{
+     P *ego = (P *) ego_;
+     int i;
+     X(plan_awake)(ego->cld, wakefulness);
+     for (i = 0; i < ego->nthr; ++i)
+	  X(plan_awake)(ego->cldws[i], wakefulness);
+}
+
+static void destroy(plan *ego_)
+{
+     P *ego = (P *) ego_;
+     int i;
+     X(plan_destroy_internal)(ego->cld);
+     for (i = 0; i < ego->nthr; ++i)
+	  X(plan_destroy_internal)(ego->cldws[i]);
+     X(ifree)(ego->cldws);
+}
+
+static void print(const plan *ego_, printer *p)
+{
+     const P *ego = (const P *) ego_;
+     int i;
+     p->print(p, "(dft-thr-ct-%s-x%d/%D",
+	      ego->super.apply == apply_dit ? "dit" : "dif",
+	      ego->nthr, ego->r);
+     for (i = 0; i < ego->nthr; ++i)
+          if (i == 0 || (ego->cldws[i] != ego->cldws[i-1] &&
+                         (i <= 1 || ego->cldws[i] != ego->cldws[i-2])))
+               p->print(p, "%(%p%)", ego->cldws[i]);
+     p->print(p, "%(%p%))", ego->cld);
+}
+
+static plan *mkplan(const solver *ego_, const problem *p_, planner *plnr)
+{
+     const ct_solver *ego = (const ct_solver *) ego_;
+     const problem_dft *p;
+     P *pln = 0;
+     plan *cld = 0, **cldws = 0;
+     INT n, r, m, v, ivs, ovs;
+     INT block_size;
+     int i, nthr, plnr_nthr_save;
+     iodim *d;
+
+     static const plan_adt padt = {
+	  X(dft_solve), awake, print, destroy
+     };
+
+     if (plnr->nthr <= 1 || !X(ct_applicable)(ego, p_, plnr))
+          return (plan *) 0;
+
+     p = (const problem_dft *) p_;
+     d = p->sz->dims;
+     n = d[0].n;
+     r = X(choose_radix)(ego->r, n);
+     m = n / r;
+
+     X(tensor_tornk1)(p->vecsz, &v, &ivs, &ovs);
+
+     block_size = (m + plnr->nthr - 1) / plnr->nthr;
+     nthr = (int)((m + block_size - 1) / block_size);
+     plnr_nthr_save = plnr->nthr;
+     plnr->nthr = (plnr->nthr + nthr - 1) / nthr;
+
+     cldws = (plan **) MALLOC(sizeof(plan *) * nthr, PLANS);
+     for (i = 0; i < nthr; ++i) cldws[i] = (plan *) 0;
+
+     switch (ego->dec) {
+	 case DECDIT:
+	 {
+	      for (i = 0; i < nthr; ++i) {
+		   cldws[i] = ego->mkcldw(ego,
+					  r, m * d[0].os, m * d[0].os,
+					  m, d[0].os,
+					  v, ovs, ovs,
+					  i*block_size,
+					  (i == nthr - 1) ?
+					  (m - i*block_size) : block_size,
+					  p->ro, p->io, plnr);
+		   if (!cldws[i]) goto nada;
+	      }
+
+	      plnr->nthr = plnr_nthr_save;
+
+	      cld = X(mkplan_d)(plnr,
+				X(mkproblem_dft_d)(
+				     X(mktensor_1d)(m, r * d[0].is, d[0].os),
+				     X(mktensor_2d)(r, d[0].is, m * d[0].os,
+						    v, ivs, ovs),
+				     p->ri, p->ii, p->ro, p->io)
+		   );
+	      if (!cld) goto nada;
+
+	      pln = MKPLAN_DFT(P, &padt, apply_dit);
+	      break;
+	 }
+	 case DECDIF:
+	 case DECDIF+TRANSPOSE:
+	 {
+	      INT cors, covs; /* cldw ors, ovs */
+	      if (ego->dec == DECDIF+TRANSPOSE) {
+		   cors = ivs;
+		   covs = m * d[0].is;
+		   /* ensure that we generate well-formed dftw subproblems */
+		   /* FIXME: too conservative */
+		   if (!(1
+			 && r == v
+			 && d[0].is == r * cors))
+			goto nada;
+
+		   /* FIXME: allow in-place only for now, like in
+		      fftw-3.[01] */
+		   if (!(1
+			 && p->ri == p->ro
+			 && d[0].is == r * d[0].os
+			 && cors == d[0].os
+			 && covs == ovs
+			    ))
+			goto nada;
+	      } else {
+		   cors = m * d[0].is;
+		   covs = ivs;
+	      }
+
+	      for (i = 0; i < nthr; ++i) {
+		   cldws[i] = ego->mkcldw(ego,
+					  r, m * d[0].is, cors,
+					  m, d[0].is,
+					  v, ivs, covs,
+					  i*block_size,
+					  (i == nthr - 1) ?
+					  (m - i*block_size) : block_size,
+					  p->ri, p->ii, plnr);
+		   if (!cldws[i]) goto nada;
+	      }
+
+	      plnr->nthr = plnr_nthr_save;
+
+	      cld = X(mkplan_d)(plnr,
+				X(mkproblem_dft_d)(
+				     X(mktensor_1d)(m, d[0].is, r * d[0].os),
+				     X(mktensor_2d)(r, cors, d[0].os,
+						    v, covs, ovs),
+				     p->ri, p->ii, p->ro, p->io)
+		   );
+	      if (!cld) goto nada;
+
+	      pln = MKPLAN_DFT(P, &padt, apply_dif);
+	      break;
+	 }
+
+	 default: A(0);
+
+     }
+
+     pln->cld = cld;
+     pln->cldws = cldws;
+     pln->nthr = nthr;
+     pln->r = r;
+     X(ops_zero)(&pln->super.super.ops);
+     for (i = 0; i < nthr; ++i) {
+          X(ops_add2)(&cldws[i]->ops, &pln->super.super.ops);
+	  pln->super.super.could_prune_now_p |= cldws[i]->could_prune_now_p;
+     }
+     X(ops_add2)(&cld->ops, &pln->super.super.ops);
+     return &(pln->super.super);
+
+ nada:
+     if (cldws) {
+	  for (i = 0; i < nthr; ++i)
+	       X(plan_destroy_internal)(cldws[i]);
+	  X(ifree)(cldws);
+     }
+     X(plan_destroy_internal)(cld);
+     return (plan *) 0;
+}
+
+ct_solver *X(mksolver_ct_threads)(size_t size, INT r, int dec,
+				  ct_mkinferior mkcldw,
+				  ct_force_vrecursion force_vrecursionp)
+{
+     static const solver_adt sadt = { PROBLEM_DFT, mkplan, 0 };
+     ct_solver *slv = (ct_solver *) X(mksolver)(size, &sadt);
+     slv->r = r;
+     slv->dec = dec;
+     slv->mkcldw = mkcldw;
+     slv->force_vrecursionp = force_vrecursionp;
+     return slv;
+}