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