furnace/extern/fftw/threads/ct.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
*
*/
#include "threads/threads.h"
typedef struct {
plan_dft super;
plan *cld;
plan **cldws;
int nthr;
INT r;
} P;
typedef struct {
plan **cldws;
R *r, *i;
} PD;
static void *spawn_apply(spawn_data *d)
{
PD *ego = (PD *) d->data;
INT thr_num = d->thr_num;
plan_dftw *cldw = (plan_dftw *) (ego->cldws[thr_num]);
cldw->apply((plan *) cldw, ego->r, ego->i);
return 0;
}
static void apply_dit(const plan *ego_, R *ri, R *ii, R *ro, R *io)
{
const P *ego = (const P *) ego_;
plan_dft *cld;
cld = (plan_dft *) ego->cld;
cld->apply(ego->cld, ri, ii, ro, io);
{
PD d;
d.r = ro; d.i = io;
d.cldws = ego->cldws;
X(spawn_loop)(ego->nthr, ego->nthr, spawn_apply, (void*)&d);
}
}
static void apply_dif(const plan *ego_, R *ri, R *ii, R *ro, R *io)
{
const P *ego = (const P *) ego_;
plan_dft *cld;
{
PD d;
d.r = ri; d.i = ii;
d.cldws = ego->cldws;
X(spawn_loop)(ego->nthr, ego->nthr, spawn_apply, (void*)&d);
}
cld = (plan_dft *) ego->cld;
cld->apply(ego->cld, ri, ii, ro, io);
}
static void awake(plan *ego_, enum wakefulness wakefulness)
{
P *ego = (P *) ego_;
int i;
X(plan_awake)(ego->cld, wakefulness);
for (i = 0; i < ego->nthr; ++i)
X(plan_awake)(ego->cldws[i], wakefulness);
}
static void destroy(plan *ego_)
{
P *ego = (P *) ego_;
int i;
X(plan_destroy_internal)(ego->cld);
for (i = 0; i < ego->nthr; ++i)
X(plan_destroy_internal)(ego->cldws[i]);
X(ifree)(ego->cldws);
}
static void print(const plan *ego_, printer *p)
{
const P *ego = (const P *) ego_;
int i;
p->print(p, "(dft-thr-ct-%s-x%d/%D",
ego->super.apply == apply_dit ? "dit" : "dif",
ego->nthr, ego->r);
for (i = 0; i < ego->nthr; ++i)
if (i == 0 || (ego->cldws[i] != ego->cldws[i-1] &&
(i <= 1 || ego->cldws[i] != ego->cldws[i-2])))
p->print(p, "%(%p%)", ego->cldws[i]);
p->print(p, "%(%p%))", ego->cld);
}
static plan *mkplan(const solver *ego_, const problem *p_, planner *plnr)
{
const ct_solver *ego = (const ct_solver *) ego_;
const problem_dft *p;
P *pln = 0;
plan *cld = 0, **cldws = 0;
INT n, r, m, v, ivs, ovs;
INT block_size;
int i, nthr, plnr_nthr_save;
iodim *d;
static const plan_adt padt = {
X(dft_solve), awake, print, destroy
};
if (plnr->nthr <= 1 || !X(ct_applicable)(ego, p_, plnr))
return (plan *) 0;
p = (const problem_dft *) p_;
d = p->sz->dims;
n = d[0].n;
r = X(choose_radix)(ego->r, n);
m = n / r;
X(tensor_tornk1)(p->vecsz, &v, &ivs, &ovs);
block_size = (m + plnr->nthr - 1) / plnr->nthr;
nthr = (int)((m + block_size - 1) / block_size);
plnr_nthr_save = plnr->nthr;
plnr->nthr = (plnr->nthr + nthr - 1) / nthr;
cldws = (plan **) MALLOC(sizeof(plan *) * nthr, PLANS);
for (i = 0; i < nthr; ++i) cldws[i] = (plan *) 0;
switch (ego->dec) {
case DECDIT:
{
for (i = 0; i < nthr; ++i) {
cldws[i] = ego->mkcldw(ego,
r, m * d[0].os, m * d[0].os,
m, d[0].os,
v, ovs, ovs,
i*block_size,
(i == nthr - 1) ?
(m - i*block_size) : block_size,
p->ro, p->io, plnr);
if (!cldws[i]) goto nada;
}
plnr->nthr = plnr_nthr_save;
cld = X(mkplan_d)(plnr,
X(mkproblem_dft_d)(
X(mktensor_1d)(m, r * d[0].is, d[0].os),
X(mktensor_2d)(r, d[0].is, m * d[0].os,
v, ivs, ovs),
p->ri, p->ii, p->ro, p->io)
);
if (!cld) goto nada;
pln = MKPLAN_DFT(P, &padt, apply_dit);
break;
}
case DECDIF:
case DECDIF+TRANSPOSE:
{
INT cors, covs; /* cldw ors, ovs */
if (ego->dec == DECDIF+TRANSPOSE) {
cors = ivs;
covs = m * d[0].is;
/* ensure that we generate well-formed dftw subproblems */
/* FIXME: too conservative */
if (!(1
&& r == v
&& d[0].is == r * cors))
goto nada;
/* FIXME: allow in-place only for now, like in
fftw-3.[01] */
if (!(1
&& p->ri == p->ro
&& d[0].is == r * d[0].os
&& cors == d[0].os
&& covs == ovs
))
goto nada;
} else {
cors = m * d[0].is;
covs = ivs;
}
for (i = 0; i < nthr; ++i) {
cldws[i] = ego->mkcldw(ego,
r, m * d[0].is, cors,
m, d[0].is,
v, ivs, covs,
i*block_size,
(i == nthr - 1) ?
(m - i*block_size) : block_size,
p->ri, p->ii, plnr);
if (!cldws[i]) goto nada;
}
plnr->nthr = plnr_nthr_save;
cld = X(mkplan_d)(plnr,
X(mkproblem_dft_d)(
X(mktensor_1d)(m, d[0].is, r * d[0].os),
X(mktensor_2d)(r, cors, d[0].os,
v, covs, ovs),
p->ri, p->ii, p->ro, p->io)
);
if (!cld) goto nada;
pln = MKPLAN_DFT(P, &padt, apply_dif);
break;
}
default: A(0);
}
pln->cld = cld;
pln->cldws = cldws;
pln->nthr = nthr;
pln->r = r;
X(ops_zero)(&pln->super.super.ops);
for (i = 0; i < nthr; ++i) {
X(ops_add2)(&cldws[i]->ops, &pln->super.super.ops);
pln->super.super.could_prune_now_p |= cldws[i]->could_prune_now_p;
}
X(ops_add2)(&cld->ops, &pln->super.super.ops);
return &(pln->super.super);
nada:
if (cldws) {
for (i = 0; i < nthr; ++i)
X(plan_destroy_internal)(cldws[i]);
X(ifree)(cldws);
}
X(plan_destroy_internal)(cld);
return (plan *) 0;
}
ct_solver *X(mksolver_ct_threads)(size_t size, INT r, int dec,
ct_mkinferior mkcldw,
ct_force_vrecursion force_vrecursionp)
{
static const solver_adt sadt = { PROBLEM_DFT, mkplan, 0 };
ct_solver *slv = (ct_solver *) X(mksolver)(size, &sadt);
slv->r = r;
slv->dec = dec;
slv->mkcldw = mkcldw;
slv->force_vrecursionp = force_vrecursionp;
return slv;
}