mirror of
https://github.com/tildearrow/furnace.git
synced 2024-11-14 00:35:06 +00:00
238 lines
6.4 KiB
C
238 lines
6.4 KiB
C
/*
|
|
* 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
|
|
*
|
|
*/
|
|
|
|
|
|
/* plans for RDFT2 of rank >= 2 (multidimensional) */
|
|
|
|
#include "rdft/rdft.h"
|
|
#include "dft/dft.h"
|
|
|
|
typedef struct {
|
|
solver super;
|
|
int spltrnk;
|
|
const int *buddies;
|
|
size_t nbuddies;
|
|
} S;
|
|
|
|
typedef struct {
|
|
plan_dft super;
|
|
plan *cldr, *cldc;
|
|
const S *solver;
|
|
} P;
|
|
|
|
static void apply_r2hc(const plan *ego_, R *r0, R *r1, R *cr, R *ci)
|
|
{
|
|
const P *ego = (const P *) ego_;
|
|
|
|
{
|
|
plan_rdft2 *cldr = (plan_rdft2 *) ego->cldr;
|
|
cldr->apply((plan *) cldr, r0, r1, cr, ci);
|
|
}
|
|
|
|
{
|
|
plan_dft *cldc = (plan_dft *) ego->cldc;
|
|
cldc->apply((plan *) cldc, cr, ci, cr, ci);
|
|
}
|
|
}
|
|
|
|
static void apply_hc2r(const plan *ego_, R *r0, R *r1, R *cr, R *ci)
|
|
{
|
|
const P *ego = (const P *) ego_;
|
|
|
|
{
|
|
plan_dft *cldc = (plan_dft *) ego->cldc;
|
|
cldc->apply((plan *) cldc, ci, cr, ci, cr);
|
|
}
|
|
|
|
{
|
|
plan_rdft2 *cldr = (plan_rdft2 *) ego->cldr;
|
|
cldr->apply((plan *) cldr, r0, r1, cr, ci);
|
|
}
|
|
|
|
}
|
|
|
|
static void awake(plan *ego_, enum wakefulness wakefulness)
|
|
{
|
|
P *ego = (P *) ego_;
|
|
X(plan_awake)(ego->cldr, wakefulness);
|
|
X(plan_awake)(ego->cldc, wakefulness);
|
|
}
|
|
|
|
static void destroy(plan *ego_)
|
|
{
|
|
P *ego = (P *) ego_;
|
|
X(plan_destroy_internal)(ego->cldr);
|
|
X(plan_destroy_internal)(ego->cldc);
|
|
}
|
|
|
|
static void print(const plan *ego_, printer *p)
|
|
{
|
|
const P *ego = (const P *) ego_;
|
|
const S *s = ego->solver;
|
|
p->print(p, "(rdft2-rank>=2/%d%(%p%)%(%p%))",
|
|
s->spltrnk, ego->cldr, ego->cldc);
|
|
}
|
|
|
|
static int picksplit(const S *ego, const tensor *sz, int *rp)
|
|
{
|
|
A(sz->rnk > 1); /* cannot split rnk <= 1 */
|
|
if (!X(pickdim)(ego->spltrnk, ego->buddies, ego->nbuddies, sz, 1, rp))
|
|
return 0;
|
|
*rp += 1; /* convert from dim. index to rank */
|
|
if (*rp >= sz->rnk) /* split must reduce rank */
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
static int applicable0(const solver *ego_, const problem *p_, int *rp,
|
|
const planner *plnr)
|
|
{
|
|
const problem_rdft2 *p = (const problem_rdft2 *) p_;
|
|
const S *ego = (const S *)ego_;
|
|
return (1
|
|
&& FINITE_RNK(p->sz->rnk) && FINITE_RNK(p->vecsz->rnk)
|
|
|
|
/* FIXME: multidimensional R2HCII ? */
|
|
&& (p->kind == R2HC || p->kind == HC2R)
|
|
|
|
&& p->sz->rnk >= 2
|
|
&& picksplit(ego, p->sz, rp)
|
|
&& (0
|
|
|
|
/* can work out-of-place, but HC2R destroys input */
|
|
|| (p->r0 != p->cr &&
|
|
(p->kind == R2HC || !NO_DESTROY_INPUTP(plnr)))
|
|
|
|
/* FIXME: what are sufficient conditions for inplace? */
|
|
|| (p->r0 == p->cr))
|
|
);
|
|
}
|
|
|
|
/* TODO: revise this. */
|
|
static int applicable(const solver *ego_, const problem *p_,
|
|
const planner *plnr, int *rp)
|
|
{
|
|
const S *ego = (const S *)ego_;
|
|
|
|
if (!applicable0(ego_, p_, rp, plnr)) return 0;
|
|
|
|
if (NO_RANK_SPLITSP(plnr) && (ego->spltrnk != ego->buddies[0]))
|
|
return 0;
|
|
|
|
if (NO_UGLYP(plnr)) {
|
|
const problem_rdft2 *p = (const problem_rdft2 *) p_;
|
|
|
|
/* Heuristic: if the vector stride is greater than the transform
|
|
size, don't use (prefer to do the vector loop first with a
|
|
vrank-geq1 plan). */
|
|
if (p->vecsz->rnk > 0 &&
|
|
X(tensor_min_stride)(p->vecsz)
|
|
> X(rdft2_tensor_max_index)(p->sz, p->kind))
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static plan *mkplan(const solver *ego_, const problem *p_, planner *plnr)
|
|
{
|
|
const S *ego = (const S *) ego_;
|
|
const problem_rdft2 *p;
|
|
P *pln;
|
|
plan *cldr = 0, *cldc = 0;
|
|
tensor *sz1, *sz2, *vecszi, *sz2i;
|
|
int spltrnk;
|
|
inplace_kind k;
|
|
problem *cldp;
|
|
|
|
static const plan_adt padt = {
|
|
X(rdft2_solve), awake, print, destroy
|
|
};
|
|
|
|
if (!applicable(ego_, p_, plnr, &spltrnk))
|
|
return (plan *) 0;
|
|
|
|
p = (const problem_rdft2 *) p_;
|
|
X(tensor_split)(p->sz, &sz1, spltrnk, &sz2);
|
|
|
|
k = p->kind == R2HC ? INPLACE_OS : INPLACE_IS;
|
|
vecszi = X(tensor_copy_inplace)(p->vecsz, k);
|
|
sz2i = X(tensor_copy_inplace)(sz2, k);
|
|
|
|
/* complex data is ~half of real */
|
|
sz2i->dims[sz2i->rnk - 1].n = sz2i->dims[sz2i->rnk - 1].n/2 + 1;
|
|
|
|
cldr = X(mkplan_d)(plnr,
|
|
X(mkproblem_rdft2_d)(X(tensor_copy)(sz2),
|
|
X(tensor_append)(p->vecsz, sz1),
|
|
p->r0, p->r1,
|
|
p->cr, p->ci, p->kind));
|
|
if (!cldr) goto nada;
|
|
|
|
if (p->kind == R2HC)
|
|
cldp = X(mkproblem_dft_d)(X(tensor_copy_inplace)(sz1, k),
|
|
X(tensor_append)(vecszi, sz2i),
|
|
p->cr, p->ci, p->cr, p->ci);
|
|
else /* HC2R must swap re/im parts to get IDFT */
|
|
cldp = X(mkproblem_dft_d)(X(tensor_copy_inplace)(sz1, k),
|
|
X(tensor_append)(vecszi, sz2i),
|
|
p->ci, p->cr, p->ci, p->cr);
|
|
cldc = X(mkplan_d)(plnr, cldp);
|
|
if (!cldc) goto nada;
|
|
|
|
pln = MKPLAN_RDFT2(P, &padt, p->kind == R2HC ? apply_r2hc : apply_hc2r);
|
|
|
|
pln->cldr = cldr;
|
|
pln->cldc = cldc;
|
|
|
|
pln->solver = ego;
|
|
X(ops_add)(&cldr->ops, &cldc->ops, &pln->super.super.ops);
|
|
|
|
X(tensor_destroy4)(sz2i, vecszi, sz2, sz1);
|
|
|
|
return &(pln->super.super);
|
|
|
|
nada:
|
|
X(plan_destroy_internal)(cldr);
|
|
X(plan_destroy_internal)(cldc);
|
|
X(tensor_destroy4)(sz2i, vecszi, sz2, sz1);
|
|
return (plan *) 0;
|
|
}
|
|
|
|
static solver *mksolver(int spltrnk, const int *buddies, size_t nbuddies)
|
|
{
|
|
static const solver_adt sadt = { PROBLEM_RDFT2, mkplan, 0 };
|
|
S *slv = MKSOLVER(S, &sadt);
|
|
slv->spltrnk = spltrnk;
|
|
slv->buddies = buddies;
|
|
slv->nbuddies = nbuddies;
|
|
return &(slv->super);
|
|
}
|
|
|
|
void X(rdft2_rank_geq2_register)(planner *p)
|
|
{
|
|
static const int buddies[] = { 1, 0, -2 };
|
|
size_t i;
|
|
|
|
for (i = 0; i < NELEM(buddies); ++i)
|
|
REGISTER_SOLVER(p, mksolver(buddies[i], buddies, NELEM(buddies)));
|
|
|
|
/* FIXME: Should we try more buddies? See also dft/rank-geq2. */
|
|
}
|