From 5a422aba704c375a307a902bafe658342e209906 Mon Sep 17 00:00:00 2001 From: scuri Date: Fri, 17 Oct 2008 06:10:15 +0000 Subject: First commit - moving from LuaForge to SourceForge --- src/fftw3/dft/indirect.c | 238 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 238 insertions(+) create mode 100644 src/fftw3/dft/indirect.c (limited to 'src/fftw3/dft/indirect.c') diff --git a/src/fftw3/dft/indirect.c b/src/fftw3/dft/indirect.c new file mode 100644 index 0000000..e00eabf --- /dev/null +++ b/src/fftw3/dft/indirect.c @@ -0,0 +1,238 @@ +/* + * 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: indirect.c,v 1.1 2008/10/17 06:11:08 scuri Exp $ */ + + +/* solvers/plans for vectors of small DFT's that cannot be done + in-place directly. Use a rank-0 plan to rearrange the data + before or after the transform. Can also change an out-of-place + plan into a copy + in-place (where the in-place transform + is e.g. unit stride). */ + +/* FIXME: merge with rank-geq2.c(?), since this is just a special case + of a rank split where the first/second transform has rank 0. */ + +#include "dft.h" + +typedef problem *(*mkcld_t) (const problem_dft *p); + +typedef struct { + dftapply apply; + problem *(*mkcld)(const problem_dft *p); + const char *nam; +} ndrct_adt; + +typedef struct { + solver super; + const ndrct_adt *adt; +} S; + +typedef struct { + plan_dft super; + plan *cldcpy, *cld; + const S *slv; +} P; + +/*-----------------------------------------------------------------------*/ +/* first rearrange, then transform */ +static void apply_before(const plan *ego_, R *ri, R *ii, R *ro, R *io) +{ + const P *ego = (const P *) ego_; + + { + plan_dft *cldcpy = (plan_dft *) ego->cldcpy; + cldcpy->apply(ego->cldcpy, ri, ii, ro, io); + } + { + plan_dft *cld = (plan_dft *) ego->cld; + cld->apply(ego->cld, ro, io, ro, io); + } +} + +static problem *mkcld_before(const problem_dft *p) +{ + return X(mkproblem_dft_d)(X(tensor_copy_inplace)(p->sz, INPLACE_OS), + X(tensor_copy_inplace)(p->vecsz, INPLACE_OS), + p->ro, p->io, p->ro, p->io); +} + +static const ndrct_adt adt_before = +{ + apply_before, mkcld_before, "dft-indirect-before" +}; + +/*-----------------------------------------------------------------------*/ +/* first transform, then rearrange */ + +static void apply_after(const plan *ego_, R *ri, R *ii, R *ro, R *io) +{ + const P *ego = (const P *) ego_; + + { + plan_dft *cld = (plan_dft *) ego->cld; + cld->apply(ego->cld, ri, ii, ri, ii); + } + { + plan_dft *cldcpy = (plan_dft *) ego->cldcpy; + cldcpy->apply(ego->cldcpy, ri, ii, ro, io); + } +} + +static problem *mkcld_after(const problem_dft *p) +{ + return X(mkproblem_dft_d)(X(tensor_copy_inplace)(p->sz, INPLACE_IS), + X(tensor_copy_inplace)(p->vecsz, INPLACE_IS), + p->ri, p->ii, p->ri, p->ii); +} + +static const ndrct_adt adt_after = +{ + apply_after, mkcld_after, "dft-indirect-after" +}; + +/*-----------------------------------------------------------------------*/ +static void destroy(plan *ego_) +{ + P *ego = (P *) ego_; + X(plan_destroy_internal)(ego->cld); + X(plan_destroy_internal)(ego->cldcpy); +} + +static void awake(plan *ego_, int flg) +{ + P *ego = (P *) ego_; + AWAKE(ego->cldcpy, flg); + AWAKE(ego->cld, flg); +} + +static void print(const plan *ego_, printer *p) +{ + const P *ego = (const P *) ego_; + const S *s = ego->slv; + p->print(p, "(%s%(%p%)%(%p%))", s->adt->nam, ego->cld, ego->cldcpy); +} + +static int applicable0(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_; + return (1 + && FINITE_RNK(p->vecsz->rnk) + + /* problem must be a nontrivial transform, not just a copy */ + && p->sz->rnk > 0 + + && (0 + + /* problem must be in-place & require some + rearrangement of the data */ + || (p->ri == p->ro + && !(X(tensor_inplace_strides2)(p->sz, p->vecsz))) + + /* or problem must be out of place, transforming + from stride 1/2 to bigger stride, for apply_after */ + || (p->ri != p->ro && ego->adt->apply == apply_after + && DESTROY_INPUTP(plnr) + && X(tensor_min_istride)(p->sz) <= 2 + && X(tensor_min_ostride)(p->sz) > 2) + + /* or problem must be out of place, transforming + to stride 1/2 from bigger stride, for apply_before */ + || (p->ri != p->ro && ego->adt->apply == apply_before + && X(tensor_min_ostride)(p->sz) <= 2 + && X(tensor_min_istride)(p->sz) > 2) + ) + ); + } + + return 0; +} + +static int applicable(const solver *ego_, const problem *p_, + const planner *plnr) +{ + if (!applicable0(ego_, p_, plnr)) return 0; + { + const problem_dft *p = (const problem_dft *) p_; + if (NO_INDIRECT_OP_P(plnr) && p->ri != p->ro) return 0; + } + return 1; +} + +static plan *mkplan(const solver *ego_, const problem *p_, planner *plnr) +{ + const problem_dft *p = (const problem_dft *) p_; + const S *ego = (const S *) ego_; + P *pln; + plan *cld = 0, *cldcpy = 0; + + static const plan_adt padt = { + X(dft_solve), awake, print, destroy + }; + + if (!applicable(ego_, p_, plnr)) + return (plan *) 0; + + plnr->planner_flags |= NO_BUFFERING; + + cldcpy = X(mkplan_d)(plnr, + X(mkproblem_dft_d)(X(mktensor_0d)(), + X(tensor_append)(p->vecsz, p->sz), + p->ri, p->ii, p->ro, p->io)); + if (!cldcpy) goto nada; + + cld = X(mkplan_d)(plnr, ego->adt->mkcld(p)); + if (!cld) goto nada; + + pln = MKPLAN_DFT(P, &padt, ego->adt->apply); + pln->cld = cld; + pln->cldcpy = cldcpy; + pln->slv = ego; + X(ops_add)(&cld->ops, &cldcpy->ops, &pln->super.super.ops); + + return &(pln->super.super); + + nada: + X(plan_destroy_internal)(cld); + X(plan_destroy_internal)(cldcpy); + return (plan *)0; +} + +static solver *mksolver(const ndrct_adt *adt) +{ + static const solver_adt sadt = { mkplan }; + S *slv = MKSOLVER(S, &sadt); + slv->adt = adt; + return &(slv->super); +} + +void X(dft_indirect_register)(planner *p) +{ + unsigned i; + static const ndrct_adt *const adts[] = { + &adt_before, &adt_after + }; + + for (i = 0; i < sizeof(adts) / sizeof(adts[0]); ++i) + REGISTER_SOLVER(p, mksolver(adts[i])); +} -- cgit v1.2.3