Chris@82: /*
Chris@82:  * Copyright (c) 2003, 2007-14 Matteo Frigo
Chris@82:  * Copyright (c) 2003, 2007-14 Massachusetts Institute of Technology
Chris@82:  *
Chris@82:  * This program is free software; you can redistribute it and/or modify
Chris@82:  * it under the terms of the GNU General Public License as published by
Chris@82:  * the Free Software Foundation; either version 2 of the License, or
Chris@82:  * (at your option) any later version.
Chris@82:  *
Chris@82:  * This program is distributed in the hope that it will be useful,
Chris@82:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
Chris@82:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
Chris@82:  * GNU General Public License for more details.
Chris@82:  *
Chris@82:  * You should have received a copy of the GNU General Public License
Chris@82:  * along with this program; if not, write to the Free Software
Chris@82:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
Chris@82:  *
Chris@82:  */
Chris@82: 
Chris@82: #include "mpi-dft.h"
Chris@82: 
Chris@82: static void destroy(problem *ego_)
Chris@82: {
Chris@82:      problem_mpi_dft *ego = (problem_mpi_dft *) ego_;
Chris@82:      XM(dtensor_destroy)(ego->sz);
Chris@82:      MPI_Comm_free(&ego->comm);
Chris@82:      X(ifree)(ego_);
Chris@82: }
Chris@82: 
Chris@82: static void hash(const problem *p_, md5 *m)
Chris@82: {
Chris@82:      const problem_mpi_dft *p = (const problem_mpi_dft *) p_;
Chris@82:      int i;
Chris@82:      X(md5puts)(m, "mpi-dft");
Chris@82:      X(md5int)(m, p->I == p->O);
Chris@82:      /* don't include alignment -- may differ between processes
Chris@82: 	X(md5int)(m, X(ialignment_of)(p->I));
Chris@82: 	X(md5int)(m, X(ialignment_of)(p->O));
Chris@82: 	... note that applicability of MPI plans does not depend
Chris@82: 	    on alignment (although optimality may, in principle). */
Chris@82:      XM(dtensor_md5)(m, p->sz);
Chris@82:      X(md5INT)(m, p->vn);
Chris@82:      X(md5int)(m, p->sign);
Chris@82:      X(md5int)(m, p->flags);
Chris@82:      MPI_Comm_size(p->comm, &i); X(md5int)(m, i);
Chris@82:      A(XM(md5_equal)(*m, p->comm));
Chris@82: }
Chris@82: 
Chris@82: static void print(const problem *ego_, printer *p)
Chris@82: {
Chris@82:      const problem_mpi_dft *ego = (const problem_mpi_dft *) ego_;
Chris@82:      int i;
Chris@82:      p->print(p, "(mpi-dft %d %d %d ", 
Chris@82: 	      ego->I == ego->O,
Chris@82: 	      X(ialignment_of)(ego->I),
Chris@82: 	      X(ialignment_of)(ego->O));
Chris@82:      XM(dtensor_print)(ego->sz, p);
Chris@82:      p->print(p, " %D %d %d", ego->vn, ego->sign, ego->flags);
Chris@82:      MPI_Comm_size(ego->comm, &i); p->print(p, " %d)", i);
Chris@82: }
Chris@82: 
Chris@82: static void zero(const problem *ego_)
Chris@82: {
Chris@82:      const problem_mpi_dft *ego = (const problem_mpi_dft *) ego_;
Chris@82:      R *I = ego->I;
Chris@82:      INT i, N;
Chris@82:      int my_pe;
Chris@82: 
Chris@82:      MPI_Comm_rank(ego->comm, &my_pe);
Chris@82:      N = 2 * ego->vn * XM(total_block)(ego->sz, IB, my_pe);
Chris@82:      for (i = 0; i < N; ++i) I[i] = K(0.0);
Chris@82: }
Chris@82: 
Chris@82: static const problem_adt padt =
Chris@82: {
Chris@82:      PROBLEM_MPI_DFT,
Chris@82:      hash,
Chris@82:      zero,
Chris@82:      print,
Chris@82:      destroy
Chris@82: };
Chris@82: 
Chris@82: problem *XM(mkproblem_dft)(const dtensor *sz, INT vn,
Chris@82: 			   R *I, R *O,
Chris@82: 			   MPI_Comm comm,
Chris@82: 			   int sign,
Chris@82: 			   unsigned flags)
Chris@82: {
Chris@82:      problem_mpi_dft *ego =
Chris@82:           (problem_mpi_dft *)X(mkproblem)(sizeof(problem_mpi_dft), &padt);
Chris@82:      int n_pes;
Chris@82: 
Chris@82:      A(XM(dtensor_validp)(sz) && FINITE_RNK(sz->rnk));
Chris@82:      MPI_Comm_size(comm, &n_pes);
Chris@82:      A(n_pes >= XM(num_blocks_total)(sz, IB)
Chris@82:        && n_pes >= XM(num_blocks_total)(sz, OB));
Chris@82:      A(vn >= 0);
Chris@82:      A(sign == -1 || sign == 1);
Chris@82: 
Chris@82:      /* enforce pointer equality if untainted pointers are equal */
Chris@82:      if (UNTAINT(I) == UNTAINT(O))
Chris@82: 	  I = O = JOIN_TAINT(I, O);
Chris@82: 
Chris@82:      ego->sz = XM(dtensor_canonical)(sz, 1);
Chris@82:      ego->vn = vn;
Chris@82:      ego->I = I;
Chris@82:      ego->O = O;
Chris@82:      ego->sign = sign;
Chris@82: 
Chris@82:      /* canonicalize: replace TRANSPOSED_IN with TRANSPOSED_OUT by
Chris@82:         swapping the first two dimensions (for rnk > 1) */
Chris@82:      if ((flags & TRANSPOSED_IN) && ego->sz->rnk > 1) {
Chris@82: 	  ddim dim0 = ego->sz->dims[0];
Chris@82: 	  ego->sz->dims[0] = ego->sz->dims[1];
Chris@82: 	  ego->sz->dims[1] = dim0;
Chris@82: 	  flags &= ~TRANSPOSED_IN;
Chris@82: 	  flags ^= TRANSPOSED_OUT;
Chris@82:      }
Chris@82:      ego->flags = flags;
Chris@82: 
Chris@82:      MPI_Comm_dup(comm, &ego->comm);
Chris@82: 
Chris@82:      return &(ego->super);
Chris@82: }
Chris@82: 
Chris@82: problem *XM(mkproblem_dft_d)(dtensor *sz, INT vn,
Chris@82: 			     R *I, R *O,
Chris@82: 			     MPI_Comm comm,
Chris@82: 			     int sign,
Chris@82: 			     unsigned flags)
Chris@82: {
Chris@82:      problem *p = XM(mkproblem_dft)(sz, vn, I, O, comm, sign, flags);
Chris@82:      XM(dtensor_destroy)(sz);
Chris@82:      return p;
Chris@82: }