comparison src/fftw-3.3.3/mpi/dft-problem.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
+ *
+ */
+
+#include "mpi-dft.h"
+
+static void destroy(problem *ego_)
+{
+     problem_mpi_dft *ego = (problem_mpi_dft *) ego_;
+     XM(dtensor_destroy)(ego->sz);
+     MPI_Comm_free(&ego->comm);
+     X(ifree)(ego_);
+}
+
+static void hash(const problem *p_, md5 *m)
+{
+     const problem_mpi_dft *p = (const problem_mpi_dft *) p_;
+     int i;
+     X(md5puts)(m, "mpi-dft");
+     X(md5int)(m, p->I == p->O);
+     /* don't include alignment -- may differ between processes
+	X(md5int)(m, X(alignment_of)(p->I));
+	X(md5int)(m, X(alignment_of)(p->O));
+	... note that applicability of MPI plans does not depend
+	    on alignment (although optimality may, in principle). */
+     XM(dtensor_md5)(m, p->sz);
+     X(md5INT)(m, p->vn);
+     X(md5int)(m, p->sign);
+     X(md5int)(m, p->flags);
+     MPI_Comm_size(p->comm, &i); X(md5int)(m, i);
+     A(XM(md5_equal)(*m, p->comm));
+}
+
+static void print(const problem *ego_, printer *p)
+{
+     const problem_mpi_dft *ego = (const problem_mpi_dft *) ego_;
+     int i;
+     p->print(p, "(mpi-dft %d %d %d ", 
+	      ego->I == ego->O,
+	      X(alignment_of)(ego->I),
+	      X(alignment_of)(ego->O));
+     XM(dtensor_print)(ego->sz, p);
+     p->print(p, " %D %d %d", ego->vn, ego->sign, ego->flags);
+     MPI_Comm_size(ego->comm, &i); p->print(p, " %d)", i);
+}
+
+static void zero(const problem *ego_)
+{
+     const problem_mpi_dft *ego = (const problem_mpi_dft *) ego_;
+     R *I = ego->I;
+     INT i, N;
+     int my_pe;
+
+     MPI_Comm_rank(ego->comm, &my_pe);
+     N = 2 * ego->vn * XM(total_block)(ego->sz, IB, my_pe);
+     for (i = 0; i < N; ++i) I[i] = K(0.0);
+}
+
+static const problem_adt padt =
+{
+     PROBLEM_MPI_DFT,
+     hash,
+     zero,
+     print,
+     destroy
+};
+
+problem *XM(mkproblem_dft)(const dtensor *sz, INT vn,
+			   R *I, R *O,
+			   MPI_Comm comm,
+			   int sign,
+			   unsigned flags)
+{
+     problem_mpi_dft *ego =
+          (problem_mpi_dft *)X(mkproblem)(sizeof(problem_mpi_dft), &padt);
+     int n_pes;
+
+     A(XM(dtensor_validp)(sz) && FINITE_RNK(sz->rnk));
+     MPI_Comm_size(comm, &n_pes);
+     A(n_pes >= XM(num_blocks_total)(sz, IB)
+       && n_pes >= XM(num_blocks_total)(sz, OB));
+     A(vn >= 0);
+     A(sign == -1 || sign == 1);
+
+     /* enforce pointer equality if untainted pointers are equal */
+     if (UNTAINT(I) == UNTAINT(O))
+	  I = O = JOIN_TAINT(I, O);
+
+     ego->sz = XM(dtensor_canonical)(sz, 1);
+     ego->vn = vn;
+     ego->I = I;
+     ego->O = O;
+     ego->sign = sign;
+
+     /* canonicalize: replace TRANSPOSED_IN with TRANSPOSED_OUT by
+        swapping the first two dimensions (for rnk > 1) */
+     if ((flags & TRANSPOSED_IN) && ego->sz->rnk > 1) {
+	  ddim dim0 = ego->sz->dims[0];
+	  ego->sz->dims[0] = ego->sz->dims[1];
+	  ego->sz->dims[1] = dim0;
+	  flags &= ~TRANSPOSED_IN;
+	  flags ^= TRANSPOSED_OUT;
+     }
+     ego->flags = flags;
+
+     MPI_Comm_dup(comm, &ego->comm);
+
+     return &(ego->super);
+}
+
+problem *XM(mkproblem_dft_d)(dtensor *sz, INT vn,
+			     R *I, R *O,
+			     MPI_Comm comm,
+			     int sign,
+			     unsigned flags)
+{
+     problem *p = XM(mkproblem_dft)(sz, vn, I, O, comm, sign, flags);
+     XM(dtensor_destroy)(sz);
+     return p;
+}