mirror of
https://github.com/tildearrow/furnace.git
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130 lines
3.6 KiB
C
130 lines
3.6 KiB
C
/*
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* Copyright (c) 2003, 2007-14 Matteo Frigo
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* Copyright (c) 2003, 2007-14 Massachusetts Institute of Technology
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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/* "MPI" DFTs where all of the data is on one processor...just
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call through to serial API. */
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#include "mpi-dft.h"
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#include "dft/dft.h"
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typedef struct {
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plan_mpi_dft super;
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plan *cld;
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INT roff, ioff;
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} P;
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static void apply(const plan *ego_, R *I, R *O)
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{
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const P *ego = (const P *) ego_;
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plan_dft *cld;
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INT roff = ego->roff, ioff = ego->ioff;
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cld = (plan_dft *) ego->cld;
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cld->apply(ego->cld, I+roff, I+ioff, O+roff, O+ioff);
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}
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static void awake(plan *ego_, enum wakefulness wakefulness)
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{
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P *ego = (P *) ego_;
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X(plan_awake)(ego->cld, wakefulness);
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}
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static void destroy(plan *ego_)
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{
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P *ego = (P *) ego_;
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X(plan_destroy_internal)(ego->cld);
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}
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static void print(const plan *ego_, printer *p)
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{
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const P *ego = (const P *) ego_;
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p->print(p, "(mpi-dft-serial %(%p%))", ego->cld);
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}
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int XM(dft_serial_applicable)(const problem_mpi_dft *p)
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{
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return (1
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&& p->flags == 0 /* TRANSPOSED/SCRAMBLED_IN/OUT not supported */
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&& ((XM(is_local)(p->sz, IB) && XM(is_local)(p->sz, OB))
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|| p->vn == 0));
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}
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static plan *mkplan(const solver *ego, const problem *p_, planner *plnr)
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{
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const problem_mpi_dft *p = (const problem_mpi_dft *) p_;
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P *pln;
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plan *cld;
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int my_pe;
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R *ri, *ii, *ro, *io;
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static const plan_adt padt = {
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XM(dft_solve), awake, print, destroy
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};
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UNUSED(ego);
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/* check whether applicable: */
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if (!XM(dft_serial_applicable)(p))
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return (plan *) 0;
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X(extract_reim)(p->sign, p->I, &ri, &ii);
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X(extract_reim)(p->sign, p->O, &ro, &io);
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MPI_Comm_rank(p->comm, &my_pe);
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if (my_pe == 0 && p->vn > 0) {
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int i, rnk = p->sz->rnk;
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tensor *sz = X(mktensor)(p->sz->rnk);
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sz->dims[rnk - 1].is = sz->dims[rnk - 1].os = 2 * p->vn;
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sz->dims[rnk - 1].n = p->sz->dims[rnk - 1].n;
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for (i = rnk - 1; i > 0; --i) {
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sz->dims[i - 1].is = sz->dims[i - 1].os =
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sz->dims[i].is * sz->dims[i].n;
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sz->dims[i - 1].n = p->sz->dims[i - 1].n;
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}
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cld = X(mkplan_d)(plnr,
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X(mkproblem_dft_d)(sz,
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X(mktensor_1d)(p->vn, 2, 2),
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ri, ii, ro, io));
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}
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else { /* idle process: make nop plan */
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cld = X(mkplan_d)(plnr,
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X(mkproblem_dft_d)(X(mktensor_0d)(),
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X(mktensor_1d)(0,0,0),
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ri, ii, ro, io));
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}
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if (XM(any_true)(!cld, p->comm)) return (plan *) 0;
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pln = MKPLAN_MPI_DFT(P, &padt, apply);
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pln->cld = cld;
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pln->roff = ro - p->O;
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pln->ioff = io - p->O;
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X(ops_cpy)(&cld->ops, &pln->super.super.ops);
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return &(pln->super.super);
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}
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static solver *mksolver(void)
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{
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static const solver_adt sadt = { PROBLEM_MPI_DFT, mkplan, 0 };
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return MKSOLVER(solver, &sadt);
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}
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void XM(dft_serial_register)(planner *p)
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{
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REGISTER_SOLVER(p, mksolver());
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}
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