furnace/extern/fftw/rdft/hc2hc.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 "rdft/hc2hc.h"
hc2hc_solver *(*X(mksolver_hc2hc_hook))(size_t, INT, hc2hc_mkinferior) = 0;
typedef struct {
plan_rdft super;
plan *cld;
plan *cldw;
INT r;
} P;
static void apply_dit(const plan *ego_, R *I, R *O)
{
const P *ego = (const P *) ego_;
plan_rdft *cld;
plan_hc2hc *cldw;
cld = (plan_rdft *) ego->cld;
cld->apply(ego->cld, I, O);
cldw = (plan_hc2hc *) ego->cldw;
cldw->apply(ego->cldw, O);
}
static void apply_dif(const plan *ego_, R *I, R *O)
{
const P *ego = (const P *) ego_;
plan_rdft *cld;
plan_hc2hc *cldw;
cldw = (plan_hc2hc *) ego->cldw;
cldw->apply(ego->cldw, I);
cld = (plan_rdft *) ego->cld;
cld->apply(ego->cld, I, O);
}
static void awake(plan *ego_, enum wakefulness wakefulness)
{
P *ego = (P *) ego_;
X(plan_awake)(ego->cld, wakefulness);
X(plan_awake)(ego->cldw, wakefulness);
}
static void destroy(plan *ego_)
{
P *ego = (P *) ego_;
X(plan_destroy_internal)(ego->cldw);
X(plan_destroy_internal)(ego->cld);
}
static void print(const plan *ego_, printer *p)
{
const P *ego = (const P *) ego_;
p->print(p, "(rdft-ct-%s/%D%(%p%)%(%p%))",
ego->super.apply == apply_dit ? "dit" : "dif",
ego->r, ego->cldw, ego->cld);
}
static int applicable0(const hc2hc_solver *ego, const problem *p_, planner *plnr)
{
const problem_rdft *p = (const problem_rdft *) p_;
INT r;
return (1
&& p->sz->rnk == 1
&& p->vecsz->rnk <= 1
&& (/* either the problem is R2HC, which is solved by DIT */
(p->kind[0] == R2HC)
||
/* or the problem is HC2R, in which case it is solved
by DIF, which destroys the input */
(p->kind[0] == HC2R &&
(p->I == p->O || !NO_DESTROY_INPUTP(plnr))))
&& ((r = X(choose_radix)(ego->r, p->sz->dims[0].n)) > 0)
&& p->sz->dims[0].n > r);
}
int X(hc2hc_applicable)(const hc2hc_solver *ego, const problem *p_, planner *plnr)
{
const problem_rdft *p;
if (!applicable0(ego, p_, plnr))
return 0;
p = (const problem_rdft *) p_;
return (0
|| p->vecsz->rnk == 0
|| !NO_VRECURSEP(plnr)
);
}
static plan *mkplan(const solver *ego_, const problem *p_, planner *plnr)
{
const hc2hc_solver *ego = (const hc2hc_solver *) ego_;
const problem_rdft *p;
P *pln = 0;
plan *cld = 0, *cldw = 0;
INT n, r, m, v, ivs, ovs;
iodim *d;
static const plan_adt padt = {
X(rdft_solve), awake, print, destroy
};
if (NO_NONTHREADEDP(plnr) || !X(hc2hc_applicable)(ego, p_, plnr))
return (plan *) 0;
p = (const problem_rdft *) 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);
switch (p->kind[0]) {
case R2HC:
cldw = ego->mkcldw(ego,
R2HC, r, m, d[0].os, v, ovs, 0, (m+2)/2,
p->O, plnr);
if (!cldw) goto nada;
cld = X(mkplan_d)(plnr,
X(mkproblem_rdft_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->I, p->O, p->kind)
);
if (!cld) goto nada;
pln = MKPLAN_RDFT(P, &padt, apply_dit);
break;
case HC2R:
cldw = ego->mkcldw(ego,
HC2R, r, m, d[0].is, v, ivs, 0, (m+2)/2,
p->I, plnr);
if (!cldw) goto nada;
cld = X(mkplan_d)(plnr,
X(mkproblem_rdft_d)(
X(mktensor_1d)(m, d[0].is, r * d[0].os),
X(mktensor_2d)(r, m * d[0].is, d[0].os,
v, ivs, ovs),
p->I, p->O, p->kind)
);
if (!cld) goto nada;
pln = MKPLAN_RDFT(P, &padt, apply_dif);
break;
default:
A(0);
}
pln->cld = cld;
pln->cldw = cldw;
pln->r = r;
X(ops_add)(&cld->ops, &cldw->ops, &pln->super.super.ops);
/* inherit could_prune_now_p attribute from cldw */
pln->super.super.could_prune_now_p = cldw->could_prune_now_p;
return &(pln->super.super);
nada:
X(plan_destroy_internal)(cldw);
X(plan_destroy_internal)(cld);
return (plan *) 0;
}
hc2hc_solver *X(mksolver_hc2hc)(size_t size, INT r, hc2hc_mkinferior mkcldw)
{
static const solver_adt sadt = { PROBLEM_RDFT, mkplan, 0 };
hc2hc_solver *slv = (hc2hc_solver *)X(mksolver)(size, &sadt);
slv->r = r;
slv->mkcldw = mkcldw;
return slv;
}
plan *X(mkplan_hc2hc)(size_t size, const plan_adt *adt, hc2hcapply apply)
{
plan_hc2hc *ego;
ego = (plan_hc2hc *) X(mkplan)(size, adt);
ego->apply = apply;
return &(ego->super);
}