mirror of
https://github.com/tildearrow/furnace.git
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233 lines
6 KiB
C
233 lines
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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#include "threads/threads.h"
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typedef struct {
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solver super;
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int vecloop_dim;
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const int *buddies;
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size_t nbuddies;
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} S;
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typedef struct {
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plan_rdft2 super;
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plan **cldrn;
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INT its, ots;
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int nthr;
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const S *solver;
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} P;
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typedef struct {
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INT its, ots;
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R *r0, *r1, *cr, *ci;
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plan **cldrn;
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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 its = ego->its;
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INT ots = ego->ots;
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int thr_num = d->thr_num;
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plan_rdft2 *cld = (plan_rdft2 *) ego->cldrn[d->thr_num];
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cld->apply((plan *) cld,
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ego->r0 + thr_num * its, ego->r1 + thr_num * its,
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ego->cr + thr_num * ots, ego->ci + thr_num * ots);
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return 0;
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}
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static void apply(const plan *ego_, R *r0, R *r1, R *cr, R *ci)
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{
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const P *ego = (const P *) ego_;
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PD d;
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d.its = ego->its;
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d.ots = ego->ots;
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d.cldrn = ego->cldrn;
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d.r0 = r0; d.r1 = r1; d.cr = cr; d.ci = ci;
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X(spawn_loop)(ego->nthr, ego->nthr, spawn_apply, (void*) &d);
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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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for (i = 0; i < ego->nthr; ++i)
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X(plan_awake)(ego->cldrn[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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for (i = 0; i < ego->nthr; ++i)
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X(plan_destroy_internal)(ego->cldrn[i]);
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X(ifree)(ego->cldrn);
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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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const S *s = ego->solver;
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int i;
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p->print(p, "(rdft2-thr-vrank>=1-x%d/%d)", ego->nthr, s->vecloop_dim);
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for (i = 0; i < ego->nthr; ++i)
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if (i == 0 || (ego->cldrn[i] != ego->cldrn[i-1] &&
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(i <= 1 || ego->cldrn[i] != ego->cldrn[i-2])))
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p->print(p, "%(%p%)", ego->cldrn[i]);
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p->putchr(p, ')');
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}
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static int pickdim(const S *ego, const tensor *vecsz, int oop, int *dp)
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{
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return X(pickdim)(ego->vecloop_dim, ego->buddies, ego->nbuddies,
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vecsz, oop, dp);
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}
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static int applicable0(const solver *ego_, const problem *p_,
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const planner *plnr, int *dp)
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{
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const S *ego = (const S *) ego_;
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const problem_rdft2 *p = (const problem_rdft2 *) p_;
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if (FINITE_RNK(p->vecsz->rnk)
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&& p->vecsz->rnk > 0
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&& plnr->nthr > 1
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&& pickdim(ego, p->vecsz, p->r0 != p->cr, dp)) {
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if (p->r0 != p->cr)
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return 1; /* can always operate out-of-place */
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return(X(rdft2_inplace_strides)(p, *dp));
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}
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return 0;
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}
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static int applicable(const solver *ego_, const problem *p_,
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const planner *plnr, int *dp)
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{
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const S *ego = (const S *)ego_;
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if (!applicable0(ego_, p_, plnr, dp)) return 0;
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/* fftw2 behavior */
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if (NO_VRANK_SPLITSP(plnr) && (ego->vecloop_dim != ego->buddies[0]))
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return 0;
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return 1;
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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 S *ego = (const S *) ego_;
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const problem_rdft2 *p;
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P *pln;
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problem *cldp;
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int vdim;
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iodim *d;
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plan **cldrn = (plan **) 0;
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int i, nthr;
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INT its, ots, block_size;
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tensor *vecsz;
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static const plan_adt padt = {
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X(rdft2_solve), awake, print, destroy
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};
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if (!applicable(ego_, p_, plnr, &vdim))
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return (plan *) 0;
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p = (const problem_rdft2 *) p_;
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d = p->vecsz->dims + vdim;
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block_size = (d->n + plnr->nthr - 1) / plnr->nthr;
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nthr = (int)((d->n + block_size - 1) / block_size);
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plnr->nthr = (plnr->nthr + nthr - 1) / nthr;
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X(rdft2_strides)(p->kind, d, &its, &ots);
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its *= block_size; ots *= block_size;
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cldrn = (plan **)MALLOC(sizeof(plan *) * nthr, PLANS);
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for (i = 0; i < nthr; ++i) cldrn[i] = (plan *) 0;
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vecsz = X(tensor_copy)(p->vecsz);
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for (i = 0; i < nthr; ++i) {
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vecsz->dims[vdim].n =
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(i == nthr - 1) ? (d->n - i*block_size) : block_size;
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cldp = X(mkproblem_rdft2)(p->sz, vecsz,
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p->r0 + i*its, p->r1 + i*its,
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p->cr + i*ots, p->ci + i*ots,
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p->kind);
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cldrn[i] = X(mkplan_d)(plnr, cldp);
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if (!cldrn[i]) goto nada;
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}
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X(tensor_destroy)(vecsz);
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pln = MKPLAN_RDFT2(P, &padt, apply);
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pln->cldrn = cldrn;
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pln->its = its;
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pln->ots = ots;
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pln->nthr = nthr;
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pln->solver = ego;
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X(ops_zero)(&pln->super.super.ops);
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pln->super.super.pcost = 0;
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for (i = 0; i < nthr; ++i) {
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X(ops_add2)(&cldrn[i]->ops, &pln->super.super.ops);
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pln->super.super.pcost += cldrn[i]->pcost;
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}
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return &(pln->super.super);
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nada:
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if (cldrn) {
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for (i = 0; i < nthr; ++i)
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X(plan_destroy_internal)(cldrn[i]);
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X(ifree)(cldrn);
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}
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X(tensor_destroy)(vecsz);
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return (plan *) 0;
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}
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static solver *mksolver(int vecloop_dim, const int *buddies, size_t nbuddies)
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{
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static const solver_adt sadt = { PROBLEM_RDFT2, mkplan, 0 };
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S *slv = MKSOLVER(S, &sadt);
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slv->vecloop_dim = vecloop_dim;
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slv->buddies = buddies;
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slv->nbuddies = nbuddies;
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return &(slv->super);
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}
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void X(rdft2_thr_vrank_geq1_register)(planner *p)
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{
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/* FIXME: Should we try other vecloop_dim values? */
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static const int buddies[] = { 1, -1 };
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size_t i;
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for (i = 0; i < NELEM(buddies); ++i)
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REGISTER_SOLVER(p, mksolver(buddies[i], buddies, NELEM(buddies)));
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}
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