mirror of
https://github.com/tildearrow/furnace.git
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382 lines
10 KiB
C
382 lines
10 KiB
C
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/*
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* Copyright (c) 2003, 2007-14 Matteo Frigo
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* Copyright (c) 2003, 2007-14 Massachusetts Institute of Technology
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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/* plans for rank-0 RDFTs (copy operations) */
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#include "rdft/rdft.h"
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#ifdef HAVE_STRING_H
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#include <string.h> /* for memcpy() */
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#endif
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#define MAXRNK 32 /* FIXME: should malloc() */
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typedef struct {
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plan_rdft super;
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INT vl;
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int rnk;
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iodim d[MAXRNK];
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const char *nam;
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} P;
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typedef struct {
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solver super;
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rdftapply apply;
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int (*applicable)(const P *pln, const problem_rdft *p);
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const char *nam;
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} S;
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/* copy up to MAXRNK dimensions from problem into plan. If a
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contiguous dimension exists, save its length in pln->vl */
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static int fill_iodim(P *pln, const problem_rdft *p)
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{
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int i;
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const tensor *vecsz = p->vecsz;
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pln->vl = 1;
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pln->rnk = 0;
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for (i = 0; i < vecsz->rnk; ++i) {
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/* extract contiguous dimensions */
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if (pln->vl == 1 &&
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vecsz->dims[i].is == 1 && vecsz->dims[i].os == 1)
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pln->vl = vecsz->dims[i].n;
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else if (pln->rnk == MAXRNK)
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return 0;
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else
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pln->d[pln->rnk++] = vecsz->dims[i];
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}
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return 1;
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}
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/* generic higher-rank copy routine, calls cpy2d() to do the real work */
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static void copy(const iodim *d, int rnk, INT vl,
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R *I, R *O,
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cpy2d_func cpy2d)
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{
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A(rnk >= 2);
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if (rnk == 2)
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cpy2d(I, O, d[0].n, d[0].is, d[0].os, d[1].n, d[1].is, d[1].os, vl);
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else {
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INT i;
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for (i = 0; i < d[0].n; ++i, I += d[0].is, O += d[0].os)
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copy(d + 1, rnk - 1, vl, I, O, cpy2d);
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}
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}
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/* FIXME: should be more general */
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static int transposep(const P *pln)
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{
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int i;
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for (i = 0; i < pln->rnk - 2; ++i)
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if (pln->d[i].is != pln->d[i].os)
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return 0;
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return (pln->d[i].n == pln->d[i+1].n &&
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pln->d[i].is == pln->d[i+1].os &&
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pln->d[i].os == pln->d[i+1].is);
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}
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/* generic higher-rank transpose routine, calls transpose2d() to do
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* the real work */
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static void transpose(const iodim *d, int rnk, INT vl,
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R *I,
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transpose_func transpose2d)
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{
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A(rnk >= 2);
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if (rnk == 2)
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transpose2d(I, d[0].n, d[0].is, d[0].os, vl);
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else {
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INT i;
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for (i = 0; i < d[0].n; ++i, I += d[0].is)
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transpose(d + 1, rnk - 1, vl, I, transpose2d);
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}
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}
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/**************************************************************/
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/* rank 0,1,2, out of place, iterative */
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static void apply_iter(const plan *ego_, R *I, R *O)
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{
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const P *ego = (const P *) ego_;
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switch (ego->rnk) {
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case 0:
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X(cpy1d)(I, O, ego->vl, 1, 1, 1);
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break;
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case 1:
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X(cpy1d)(I, O,
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ego->d[0].n, ego->d[0].is, ego->d[0].os,
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ego->vl);
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break;
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default:
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copy(ego->d, ego->rnk, ego->vl, I, O, X(cpy2d_ci));
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break;
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}
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}
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static int applicable_iter(const P *pln, const problem_rdft *p)
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{
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UNUSED(pln);
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return (p->I != p->O);
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}
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/**************************************************************/
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/* out of place, write contiguous output */
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static void apply_cpy2dco(const plan *ego_, R *I, R *O)
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{
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const P *ego = (const P *) ego_;
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copy(ego->d, ego->rnk, ego->vl, I, O, X(cpy2d_co));
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}
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static int applicable_cpy2dco(const P *pln, const problem_rdft *p)
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{
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int rnk = pln->rnk;
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return (1
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&& p->I != p->O
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&& rnk >= 2
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/* must not duplicate apply_iter */
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&& (X(iabs)(pln->d[rnk - 2].is) <= X(iabs)(pln->d[rnk - 1].is)
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X(iabs)(pln->d[rnk - 2].os) <= X(iabs)(pln->d[rnk - 1].os))
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);
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}
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/**************************************************************/
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/* out of place, tiled, no buffering */
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static void apply_tiled(const plan *ego_, R *I, R *O)
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{
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const P *ego = (const P *) ego_;
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copy(ego->d, ego->rnk, ego->vl, I, O, X(cpy2d_tiled));
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}
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static int applicable_tiled(const P *pln, const problem_rdft *p)
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{
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return (1
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&& p->I != p->O
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&& pln->rnk >= 2
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/* somewhat arbitrary */
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&& X(compute_tilesz)(pln->vl, 1) > 4
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);
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}
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/**************************************************************/
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/* out of place, tiled, with buffer */
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static void apply_tiledbuf(const plan *ego_, R *I, R *O)
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{
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const P *ego = (const P *) ego_;
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copy(ego->d, ego->rnk, ego->vl, I, O, X(cpy2d_tiledbuf));
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}
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#define applicable_tiledbuf applicable_tiled
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/**************************************************************/
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/* rank 0, out of place, using memcpy */
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static void apply_memcpy(const plan *ego_, R *I, R *O)
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{
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const P *ego = (const P *) ego_;
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A(ego->rnk == 0);
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memcpy(O, I, ego->vl * sizeof(R));
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}
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static int applicable_memcpy(const P *pln, const problem_rdft *p)
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{
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return (1
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&& p->I != p->O
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&& pln->rnk == 0
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&& pln->vl > 2 /* do not bother memcpy-ing complex numbers */
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);
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}
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/**************************************************************/
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/* rank > 0 vecloop, out of place, using memcpy (e.g. out-of-place
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transposes of vl-tuples ... for large vl it should be more
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efficient to use memcpy than the tiled stuff). */
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static void memcpy_loop(size_t cpysz, int rnk, const iodim *d, R *I, R *O)
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{
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INT i, n = d->n, is = d->is, os = d->os;
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if (rnk == 1)
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for (i = 0; i < n; ++i, I += is, O += os)
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memcpy(O, I, cpysz);
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else {
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--rnk; ++d;
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for (i = 0; i < n; ++i, I += is, O += os)
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memcpy_loop(cpysz, rnk, d, I, O);
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}
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}
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static void apply_memcpy_loop(const plan *ego_, R *I, R *O)
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{
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const P *ego = (const P *) ego_;
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memcpy_loop(ego->vl * sizeof(R), ego->rnk, ego->d, I, O);
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}
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static int applicable_memcpy_loop(const P *pln, const problem_rdft *p)
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{
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return (p->I != p->O
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&& pln->rnk > 0
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&& pln->vl > 2 /* do not bother memcpy-ing complex numbers */);
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}
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/**************************************************************/
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/* rank 2, in place, square transpose, iterative */
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static void apply_ip_sq(const plan *ego_, R *I, R *O)
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{
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const P *ego = (const P *) ego_;
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UNUSED(O);
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transpose(ego->d, ego->rnk, ego->vl, I, X(transpose));
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}
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static int applicable_ip_sq(const P *pln, const problem_rdft *p)
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{
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return (1
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&& p->I == p->O
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&& pln->rnk >= 2
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&& transposep(pln));
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}
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/**************************************************************/
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/* rank 2, in place, square transpose, tiled */
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static void apply_ip_sq_tiled(const plan *ego_, R *I, R *O)
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{
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const P *ego = (const P *) ego_;
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UNUSED(O);
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transpose(ego->d, ego->rnk, ego->vl, I, X(transpose_tiled));
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}
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static int applicable_ip_sq_tiled(const P *pln, const problem_rdft *p)
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{
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return (1
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&& applicable_ip_sq(pln, p)
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/* somewhat arbitrary */
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&& X(compute_tilesz)(pln->vl, 2) > 4
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);
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}
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/**************************************************************/
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/* rank 2, in place, square transpose, tiled, buffered */
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static void apply_ip_sq_tiledbuf(const plan *ego_, R *I, R *O)
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{
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const P *ego = (const P *) ego_;
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UNUSED(O);
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transpose(ego->d, ego->rnk, ego->vl, I, X(transpose_tiledbuf));
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}
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#define applicable_ip_sq_tiledbuf applicable_ip_sq_tiled
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/**************************************************************/
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static int applicable(const S *ego, const problem *p_)
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{
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const problem_rdft *p = (const problem_rdft *) p_;
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P pln;
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return (1
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&& p->sz->rnk == 0
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&& FINITE_RNK(p->vecsz->rnk)
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&& fill_iodim(&pln, p)
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&& ego->applicable(&pln, p)
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);
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}
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static void print(const plan *ego_, printer *p)
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{
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const P *ego = (const P *) ego_;
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int i;
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p->print(p, "(%s/%D", ego->nam, ego->vl);
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for (i = 0; i < ego->rnk; ++i)
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p->print(p, "%v", ego->d[i].n);
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p->print(p, ")");
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}
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static plan *mkplan(const solver *ego_, const problem *p_, planner *plnr)
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{
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const problem_rdft *p;
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const S *ego = (const S *) ego_;
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P *pln;
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int retval;
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static const plan_adt padt = {
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X(rdft_solve), X(null_awake), print, X(plan_null_destroy)
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};
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UNUSED(plnr);
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if (!applicable(ego, p_))
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return (plan *) 0;
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p = (const problem_rdft *) p_;
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pln = MKPLAN_RDFT(P, &padt, ego->apply);
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retval = fill_iodim(pln, p);
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(void)retval; /* UNUSED unless DEBUG */
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A(retval);
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A(pln->vl > 0); /* because FINITE_RNK(p->vecsz->rnk) holds */
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pln->nam = ego->nam;
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/* X(tensor_sz)(p->vecsz) loads, X(tensor_sz)(p->vecsz) stores */
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X(ops_other)(2 * X(tensor_sz)(p->vecsz), &pln->super.super.ops);
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return &(pln->super.super);
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}
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void X(rdft_rank0_register)(planner *p)
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{
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unsigned i;
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static struct {
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rdftapply apply;
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int (*applicable)(const P *, const problem_rdft *);
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const char *nam;
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} tab[] = {
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{ apply_memcpy, applicable_memcpy, "rdft-rank0-memcpy" },
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{ apply_memcpy_loop, applicable_memcpy_loop,
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"rdft-rank0-memcpy-loop" },
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{ apply_iter, applicable_iter, "rdft-rank0-iter-ci" },
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{ apply_cpy2dco, applicable_cpy2dco, "rdft-rank0-iter-co" },
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{ apply_tiled, applicable_tiled, "rdft-rank0-tiled" },
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{ apply_tiledbuf, applicable_tiledbuf, "rdft-rank0-tiledbuf" },
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{ apply_ip_sq, applicable_ip_sq, "rdft-rank0-ip-sq" },
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{
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apply_ip_sq_tiled,
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applicable_ip_sq_tiled,
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"rdft-rank0-ip-sq-tiled"
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},
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{
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apply_ip_sq_tiledbuf,
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applicable_ip_sq_tiledbuf,
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"rdft-rank0-ip-sq-tiledbuf"
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},
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};
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for (i = 0; i < sizeof(tab) / sizeof(tab[0]); ++i) {
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static const solver_adt sadt = { PROBLEM_RDFT, mkplan, 0 };
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S *slv = MKSOLVER(S, &sadt);
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slv->apply = tab[i].apply;
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slv->applicable = tab[i].applicable;
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slv->nam = tab[i].nam;
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REGISTER_SOLVER(p, &(slv->super));
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}
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}
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