furnace/extern/fftw/mpi/dft-serial.c

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/*
* 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
*
*/
/* "MPI" DFTs where all of the data is on one processor...just
call through to serial API. */
#include "mpi-dft.h"
#include "dft/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());
}