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/*
* Copyright (c) 2003 Matteo Frigo
* Copyright (c) 2003 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
/* $Id: direct.c,v 1.1 2008/10/17 06:11:08 scuri Exp $ */
/* direct DFT solver, if we have a codelet */
#include "dft.h"
typedef struct {
solver super;
const kdft_desc *desc;
kdft k;
} S;
typedef struct {
plan_dft super;
stride is, os;
int vl;
int ivs, ovs;
kdft k;
const S *slv;
} P;
static void apply(const plan *ego_, R *ri, R *ii, R *ro, R *io)
{
const P *ego = (const P *) ego_;
ASSERT_ALIGNED_DOUBLE;
ego->k(ri, ii, ro, io, ego->is, ego->os, ego->vl, ego->ivs, ego->ovs);
}
static void destroy(plan *ego_)
{
P *ego = (P *) ego_;
X(stride_destroy)(ego->is);
X(stride_destroy)(ego->os);
}
static void print(const plan *ego_, printer *p)
{
const P *ego = (const P *) ego_;
const S *s = ego->slv;
const kdft_desc *d = s->desc;
p->print(p, "(dft-direct-%d%v \"%s\")", d->sz, ego->vl, d->nam);
}
static int applicable(const solver *ego_, const problem *p_,
const planner *plnr)
{
if (DFTP(p_)) {
const S *ego = (const S *) ego_;
const problem_dft *p = (const problem_dft *) p_;
const kdft_desc *d = ego->desc;
int vl;
int ivs, ovs;
return (
1
&& p->sz->rnk == 1
&& p->vecsz->rnk <= 1
&& p->sz->dims[0].n == d->sz
/* check strides etc */
&& X(tensor_tornk1)(p->vecsz, &vl, &ivs, &ovs)
&& (d->genus->okp(d, p->ri, p->ii, p->ro, p->io,
p->sz->dims[0].is, p->sz->dims[0].os,
vl, ivs, ovs, plnr))
&& (0
/* can operate out-of-place */
|| p->ri != p->ro
/*
* can compute one transform in-place, no matter
* what the strides are.
*/
|| p->vecsz->rnk == 0
/* can operate in-place as long as strides are the same */
|| (X(tensor_inplace_strides2)(p->sz, p->vecsz))
)
);
}
return 0;
}
static plan *mkplan(const solver *ego_, const problem *p_, planner *plnr)
{
const S *ego = (const S *) ego_;
P *pln;
const problem_dft *p;
iodim *d;
const kdft_desc *e = ego->desc;
static const plan_adt padt = {
X(dft_solve), X(null_awake), print, destroy
};
UNUSED(plnr);
if (!applicable(ego_, p_, plnr))
return (plan *)0;
p = (const problem_dft *) p_;
pln = MKPLAN_DFT(P, &padt, apply);
d = p->sz->dims;
pln->k = ego->k;
pln->is = X(mkstride)(e->sz, d[0].is);
pln->os = X(mkstride)(e->sz, d[0].os);
X(tensor_tornk1)(p->vecsz, &pln->vl, &pln->ivs, &pln->ovs);
pln->slv = ego;
X(ops_zero)(&pln->super.super.ops);
X(ops_madd2)(pln->vl / e->genus->vl, &e->ops, &pln->super.super.ops);
return &(pln->super.super);
}
/* constructor */
solver *X(mksolver_dft_direct)(kdft k, const kdft_desc *desc)
{
static const solver_adt sadt = { mkplan };
S *slv = MKSOLVER(S, &sadt);
slv->k = k;
slv->desc = desc;
return &(slv->super);
}
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