mirror of
https://github.com/tildearrow/furnace.git
synced 2024-11-24 13:35:11 +00:00
90 lines
2.4 KiB
C
90 lines
2.4 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 vrank -infty RDFT2s (nothing to do), as well as in-place
|
|
rank-0 HC2R. Note that in-place rank-0 R2HC is *not* a no-op, because
|
|
we have to set the imaginary parts of the output to zero. */
|
|
|
|
#include "rdft/rdft.h"
|
|
|
|
static void apply(const plan *ego_, R *r0, R *r1, R *cr, R *ci)
|
|
{
|
|
UNUSED(ego_);
|
|
UNUSED(r0);
|
|
UNUSED(r1);
|
|
UNUSED(cr);
|
|
UNUSED(ci);
|
|
}
|
|
|
|
static int applicable(const solver *ego_, const problem *p_)
|
|
{
|
|
const problem_rdft2 *p = (const problem_rdft2 *) p_;
|
|
UNUSED(ego_);
|
|
|
|
return(0
|
|
/* case 1 : -infty vector rank */
|
|
|| (p->vecsz->rnk == RNK_MINFTY)
|
|
|
|
/* case 2 : rank-0 in-place rdft, except that
|
|
R2HC is not a no-op because it sets the imaginary
|
|
part to 0 */
|
|
|| (1
|
|
&& p->kind != R2HC
|
|
&& p->sz->rnk == 0
|
|
&& FINITE_RNK(p->vecsz->rnk)
|
|
&& (p->r0 == p->cr)
|
|
&& X(rdft2_inplace_strides)(p, RNK_MINFTY)
|
|
));
|
|
}
|
|
|
|
static void print(const plan *ego, printer *p)
|
|
{
|
|
UNUSED(ego);
|
|
p->print(p, "(rdft2-nop)");
|
|
}
|
|
|
|
static plan *mkplan(const solver *ego, const problem *p, planner *plnr)
|
|
{
|
|
static const plan_adt padt = {
|
|
X(rdft2_solve), X(null_awake), print, X(plan_null_destroy)
|
|
};
|
|
plan_rdft2 *pln;
|
|
|
|
UNUSED(plnr);
|
|
|
|
if (!applicable(ego, p))
|
|
return (plan *) 0;
|
|
pln = MKPLAN_RDFT2(plan_rdft2, &padt, apply);
|
|
X(ops_zero)(&pln->super.ops);
|
|
|
|
return &(pln->super);
|
|
}
|
|
|
|
static solver *mksolver(void)
|
|
{
|
|
static const solver_adt sadt = { PROBLEM_RDFT2, mkplan, 0 };
|
|
return MKSOLVER(solver, &sadt);
|
|
}
|
|
|
|
void X(rdft2_nop_register)(planner *p)
|
|
{
|
|
REGISTER_SOLVER(p, mksolver());
|
|
}
|