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authorscuri <scuri>2009-08-20 12:35:06 +0000
committerscuri <scuri>2009-08-20 12:35:06 +0000
commit5d735255ddd3cb2f547abd3d03969af3fb7eb04e (patch)
tree8fb66510bc625bb1b08ccb41f1b83fb0f7cb8f19 /src/fftw3/reodft/redft00e-r2hc-pad.c
parent35733b87eed86e5228f12fa10c98a3d9d22a6073 (diff)
*** empty log message ***
Diffstat (limited to 'src/fftw3/reodft/redft00e-r2hc-pad.c')
-rw-r--r--src/fftw3/reodft/redft00e-r2hc-pad.c201
1 files changed, 0 insertions, 201 deletions
diff --git a/src/fftw3/reodft/redft00e-r2hc-pad.c b/src/fftw3/reodft/redft00e-r2hc-pad.c
deleted file mode 100644
index ec3fa35..0000000
--- a/src/fftw3/reodft/redft00e-r2hc-pad.c
+++ /dev/null
@@ -1,201 +0,0 @@
-/*
- * 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: redft00e-r2hc-pad.c,v 1.1 2008/10/17 06:13:18 scuri Exp $ */
-
-/* Do a REDFT00 problem via an R2HC problem, padded symmetrically to
- twice the size. This is asymptotically a factor of ~2 worse than
- redft00e-r2hc.c (the algorithm used in e.g. FFTPACK and Numerical
- Recipes), but we abandoned the latter after we discovered that it
- has intrinsic accuracy problems. */
-
-#include "reodft.h"
-
-typedef struct {
- solver super;
-} S;
-
-typedef struct {
- plan_rdft super;
- plan *cld, *cldcpy;
- int is;
- int n;
- int vl;
- int ivs, ovs;
-} P;
-
-static void apply(const plan *ego_, R *I, R *O)
-{
- const P *ego = (const P *) ego_;
- int is = ego->is;
- int i, n = ego->n;
- int iv, vl = ego->vl;
- int ivs = ego->ivs, ovs = ego->ovs;
- R *buf;
-
- buf = (R *) MALLOC(sizeof(R) * (2*n), BUFFERS);
-
- for (iv = 0; iv < vl; ++iv, I += ivs, O += ovs) {
- buf[0] = I[0];
- for (i = 1; i < n; ++i) {
- R a = I[i * is];
- buf[i] = a;
- buf[2*n - i] = a;
- }
- buf[i] = I[i * is]; /* i == n, Nyquist */
-
- /* r2hc transform of size 2*n */
- {
- plan_rdft *cld = (plan_rdft *) ego->cld;
- cld->apply((plan *) cld, buf, buf);
- }
-
- /* copy n+1 real numbers (real parts of hc array) from buf to O */
- {
- plan_rdft *cldcpy = (plan_rdft *) ego->cldcpy;
- cldcpy->apply((plan *) cldcpy, buf, O);
- }
- }
-
- X(ifree)(buf);
-}
-
-static void awake(plan *ego_, int flg)
-{
- P *ego = (P *) ego_;
- AWAKE(ego->cld, flg);
- AWAKE(ego->cldcpy, flg);
-}
-
-static void destroy(plan *ego_)
-{
- P *ego = (P *) ego_;
- X(plan_destroy_internal)(ego->cldcpy);
- X(plan_destroy_internal)(ego->cld);
-}
-
-static void print(const plan *ego_, printer *p)
-{
- const P *ego = (const P *) ego_;
- p->print(p, "(redft00e-r2hc-pad-%d%v%(%p%)%(%p%))",
- ego->n + 1, ego->vl, ego->cld, ego->cldcpy);
-}
-
-static int applicable0(const solver *ego_, const problem *p_)
-{
- UNUSED(ego_);
- if (RDFTP(p_)) {
- const problem_rdft *p = (const problem_rdft *) p_;
- return (1
- && p->sz->rnk == 1
- && p->vecsz->rnk <= 1
- && p->kind[0] == REDFT00
- && p->sz->dims[0].n > 1 /* n == 1 is not well-defined */
- );
- }
-
- return 0;
-}
-
-static int applicable(const solver *ego, const problem *p, const planner *plnr)
-{
- return (!NO_UGLYP(plnr) && applicable0(ego, p));
-}
-
-static plan *mkplan(const solver *ego_, const problem *p_, planner *plnr)
-{
- P *pln;
- const problem_rdft *p;
- plan *cld = (plan *) 0, *cldcpy;
- R *buf = (R *) 0;
- int n;
- int vl, ivs, ovs;
- opcnt ops;
-
- static const plan_adt padt = {
- X(rdft_solve), awake, print, destroy
- };
-
- if (!applicable(ego_, p_, plnr))
- goto nada;
-
- p = (const problem_rdft *) p_;
-
- n = p->sz->dims[0].n - 1;
- A(n > 0);
- buf = (R *) MALLOC(sizeof(R) * (2*n), BUFFERS);
-
- cld = X(mkplan_d)(plnr,X(mkproblem_rdft_1_d)(X(mktensor_1d)(2*n,1,1),
- X(mktensor_0d)(),
- buf, buf, R2HC));
- if (!cld)
- goto nada;
-
- X(tensor_tornk1)(p->vecsz, &vl, &ivs, &ovs);
- cldcpy =
- X(mkplan_d)(plnr,
- X(mkproblem_rdft_1_d)(X(mktensor_0d)(),
- X(mktensor_1d)(n+1,1,
- p->sz->dims[0].os),
- buf, TAINT(p->O, ovs), R2HC));
- if (!cldcpy)
- goto nada;
-
- X(ifree)(buf);
-
- pln = MKPLAN_RDFT(P, &padt, apply);
-
- pln->n = n;
- pln->is = p->sz->dims[0].is;
- pln->cld = cld;
- pln->cldcpy = cldcpy;
- pln->vl = vl;
- pln->ivs = ivs;
- pln->ovs = ovs;
-
- X(ops_zero)(&ops);
- ops.other = n + 2*n; /* loads + stores (input -> buf) */
-
- X(ops_zero)(&pln->super.super.ops);
- X(ops_madd2)(pln->vl, &ops, &pln->super.super.ops);
- X(ops_madd2)(pln->vl, &cld->ops, &pln->super.super.ops);
- X(ops_madd2)(pln->vl, &cldcpy->ops, &pln->super.super.ops);
-
- return &(pln->super.super);
-
- nada:
- X(ifree0)(buf);
- if (cld)
- X(plan_destroy_internal)(cld);
- return (plan *)0;
-}
-
-/* constructor */
-static solver *mksolver(void)
-{
- static const solver_adt sadt = { mkplan };
- S *slv = MKSOLVER(S, &sadt);
- return &(slv->super);
-}
-
-void X(redft00e_r2hc_pad_register)(planner *p)
-{
- REGISTER_SOLVER(p, mksolver());
-}