comparison src/fftw-3.3.3/mpi/dft-serial.c @ 10:37bf6b4a2645

Add FFTW3

+/*
+ * 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
+ *
+ */
+
+/* "MPI" DFTs where all of the data is on one processor...just
+   call through to serial API. */
+
+#include "mpi-dft.h"
+#include "dft.h"
+
+typedef struct {
+     plan_mpi_dft super;
+     plan *cld;
+     INT roff, ioff;
+} P;
+
+static void apply(const plan *ego_, R *I, R *O)
+{
+     const P *ego = (const P *) ego_;
+     plan_dft *cld;
+     INT roff = ego->roff, ioff = ego->ioff;
+     cld = (plan_dft *) ego->cld;
+     cld->apply(ego->cld, I+roff, I+ioff, O+roff, O+ioff);
+}
+
+static void awake(plan *ego_, enum wakefulness wakefulness)
+{
+     P *ego = (P *) ego_;
+     X(plan_awake)(ego->cld, wakefulness);
+}
+
+static void destroy(plan *ego_)
+{
+     P *ego = (P *) ego_;
+     X(plan_destroy_internal)(ego->cld);
+}
+
+static void print(const plan *ego_, printer *p)
+{
+     const P *ego = (const P *) ego_;
+     p->print(p, "(mpi-dft-serial %(%p%))", ego->cld);
+}
+
+int XM(dft_serial_applicable)(const problem_mpi_dft *p)
+{
+     return (1
+	     && p->flags == 0 /* TRANSPOSED/SCRAMBLED_IN/OUT not supported */
+	     && ((XM(is_local)(p->sz, IB) && XM(is_local)(p->sz, OB))
+		 || p->vn == 0));
+}
+
+static plan *mkplan(const solver *ego, const problem *p_, planner *plnr)
+{
+     const problem_mpi_dft *p = (const problem_mpi_dft *) p_;
+     P *pln;
+     plan *cld;
+     int my_pe;
+     R *ri, *ii, *ro, *io;
+     static const plan_adt padt = {
+          XM(dft_solve), awake, print, destroy
+     };
+
+     UNUSED(ego);
+
+     /* check whether applicable: */
+     if (!XM(dft_serial_applicable)(p))
+          return (plan *) 0;
+
+     X(extract_reim)(p->sign, p->I, &ri, &ii);
+     X(extract_reim)(p->sign, p->O, &ro, &io);
+
+     MPI_Comm_rank(p->comm, &my_pe);
+     if (my_pe == 0 && p->vn > 0) {
+	  int i, rnk = p->sz->rnk;
+	  tensor *sz = X(mktensor)(p->sz->rnk);
+	  sz->dims[rnk - 1].is = sz->dims[rnk - 1].os = 2 * p->vn;
+	  sz->dims[rnk - 1].n = p->sz->dims[rnk - 1].n;
+	  for (i = rnk - 1; i > 0; --i) {
+	       sz->dims[i - 1].is = sz->dims[i - 1].os = 
+		    sz->dims[i].is * sz->dims[i].n;
+	       sz->dims[i - 1].n = p->sz->dims[i - 1].n;
+	  }
+	  
+	  cld = X(mkplan_d)(plnr,
+			    X(mkproblem_dft_d)(sz,
+					       X(mktensor_1d)(p->vn, 2, 2),
+					       ri, ii, ro, io));
+     }
+     else { /* idle process: make nop plan */
+	  cld = X(mkplan_d)(plnr,
+			    X(mkproblem_dft_d)(X(mktensor_0d)(),
+					       X(mktensor_1d)(0,0,0),
+					       ri, ii, ro, io));
+     }
+     if (XM(any_true)(!cld, p->comm)) return (plan *) 0;
+
+     pln = MKPLAN_MPI_DFT(P, &padt, apply);
+     pln->cld = cld;
+     pln->roff = ro - p->O;
+     pln->ioff = io - p->O;
+     X(ops_cpy)(&cld->ops, &pln->super.super.ops);
+     return &(pln->super.super);
+}
+
+static solver *mksolver(void)
+{
+     static const solver_adt sadt = { PROBLEM_MPI_DFT, mkplan, 0 };
+     return MKSOLVER(solver, &sadt);
+}
+
+void XM(dft_serial_register)(planner *p)
+{
+     REGISTER_SOLVER(p, mksolver());
+}