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/rdft/rank-geq2-rdft2.c | 243 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 243 insertions(+) create mode 100644 src/fftw3/rdft/rank-geq2-rdft2.c (limited to 'src/fftw3/rdft/rank-geq2-rdft2.c') diff --git a/src/fftw3/rdft/rank-geq2-rdft2.c b/src/fftw3/rdft/rank-geq2-rdft2.c new file mode 100644 index 0000000..c1809c9 --- /dev/null +++ b/src/fftw3/rdft/rank-geq2-rdft2.c @@ -0,0 +1,243 @@ +/* + * 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: rank-geq2-rdft2.c,v 1.1 2008/10/17 06:11:29 scuri Exp $ */ + +/* plans for RDFT2 of rank >= 2 (multidimensional) */ + +#include "rdft.h" +#include "dft.h" + +typedef struct { + solver super; + int spltrnk; + const int *buddies; + int nbuddies; +} S; + +typedef struct { + plan_dft super; + plan *cldr, *cldc; + const S *solver; +} P; + +static void apply_r2hc(const plan *ego_, R *r, R *rio, R *iio) +{ + const P *ego = (const P *) ego_; + + { + plan_rdft2 *cldr = (plan_rdft2 *) ego->cldr; + cldr->apply((plan *) cldr, r, rio, iio); + } + + { + plan_dft *cldc = (plan_dft *) ego->cldc; + cldc->apply((plan *) cldc, rio, iio, rio, iio); + } +} + +static void apply_hc2r(const plan *ego_, R *r, R *rio, R *iio) +{ + const P *ego = (const P *) ego_; + + { + plan_dft *cldc = (plan_dft *) ego->cldc; + cldc->apply((plan *) cldc, iio, rio, iio, rio); + } + + { + plan_rdft2 *cldr = (plan_rdft2 *) ego->cldr; + cldr->apply((plan *) cldr, r, rio, iio); + } + +} + +static void awake(plan *ego_, int flg) +{ + P *ego = (P *) ego_; + AWAKE(ego->cldr, flg); + AWAKE(ego->cldc, flg); +} + +static void destroy(plan *ego_) +{ + P *ego = (P *) ego_; + X(plan_destroy_internal)(ego->cldr); + X(plan_destroy_internal)(ego->cldc); +} + +static void print(const plan *ego_, printer *p) +{ + const P *ego = (const P *) ego_; + const S *s = ego->solver; + p->print(p, "(rdft2-rank>=2/%d%(%p%)%(%p%))", + s->spltrnk, ego->cldr, ego->cldc); +} + +static int picksplit(const S *ego, const tensor *sz, int *rp) +{ + A(sz->rnk > 1); /* cannot split rnk <= 1 */ + if (!X(pickdim)(ego->spltrnk, ego->buddies, ego->nbuddies, sz, 1, rp)) + return 0; + *rp += 1; /* convert from dim. index to rank */ + if (*rp >= sz->rnk) /* split must reduce rank */ + return 0; + return 1; +} + +static int applicable0(const solver *ego_, const problem *p_, int *rp, + const planner *plnr) +{ + if (RDFT2P(p_)) { + const problem_rdft2 *p = (const problem_rdft2 *) p_; + const S *ego = (const S *)ego_; + return (1 + && p->sz->rnk >= 2 + && picksplit(ego, p->sz, rp) + && (0 + + /* can work out-of-place, but HC2R destroys input */ + || (p->r != p->rio && p->r != p->iio && + (p->kind == R2HC || DESTROY_INPUTP(plnr))) + + /* FIXME: what are sufficient conditions for inplace? */ + || (!(p->r != p->rio && p->r != p->iio)) + ) + ); + } + + return 0; +} + +/* TODO: revise this. */ +static int applicable(const solver *ego_, const problem *p_, + const planner *plnr, int *rp) +{ + const S *ego = (const S *)ego_; + + if (!applicable0(ego_, p_, rp, plnr)) return 0; + + /* fixed spltrnk (unlike fftw2's spltrnk=1, default buddies[0] is + spltrnk=0, which is an asymptotic "theoretical optimum" for + an ideal cache; it's equivalent to spltrnk=1 for rnk < 4). */ + if (NO_RANK_SPLITSP(plnr) && (ego->spltrnk != ego->buddies[0])) + return 0; + + if (NO_UGLYP(plnr)) { + const problem_rdft2 *p = (const problem_rdft2 *) p_; + + /* Heuristic: if the vector stride is greater than the transform + sz, don't use (prefer to do the vector loop first with a + vrank-geq1 plan). */ + if (p->vecsz->rnk > 0 && + X(tensor_min_stride)(p->vecsz) + > X(rdft2_tensor_max_index)(p->sz, p->kind)) + return 0; + } + + return 1; +} + +static plan *mkplan(const solver *ego_, const problem *p_, planner *plnr) +{ + const S *ego = (const S *) ego_; + const problem_rdft2 *p; + P *pln; + plan *cldr = 0, *cldc = 0; + tensor *sz1, *sz2, *vecszi, *sz2i; + int spltrnk; + inplace_kind k; + problem *cldp; + + static const plan_adt padt = { + X(rdft2_solve), awake, print, destroy + }; + + if (!applicable(ego_, p_, plnr, &spltrnk)) + return (plan *) 0; + + p = (const problem_rdft2 *) p_; + X(tensor_split)(p->sz, &sz1, spltrnk, &sz2); + + k = p->kind == R2HC ? INPLACE_OS : INPLACE_IS; + vecszi = X(tensor_copy_inplace)(p->vecsz, k); + sz2i = X(tensor_copy_inplace)(sz2, k); + + /* complex data is ~half of real */ + sz2i->dims[sz2i->rnk - 1].n = sz2i->dims[sz2i->rnk - 1].n/2 + 1; + + cldr = X(mkplan_d)(plnr, + X(mkproblem_rdft2_d)(X(tensor_copy)(sz2), + X(tensor_append)(p->vecsz, sz1), + p->r, p->rio, p->iio, p->kind)); + if (!cldr) goto nada; + + if (p->kind == R2HC) + cldp = X(mkproblem_dft_d)(X(tensor_copy_inplace)(sz1, k), + X(tensor_append)(vecszi, sz2i), + p->rio, p->iio, p->rio, p->iio); + else /* HC2R must swap re/im parts to get IDFT */ + cldp = X(mkproblem_dft_d)(X(tensor_copy_inplace)(sz1, k), + X(tensor_append)(vecszi, sz2i), + p->iio, p->rio, p->iio, p->rio); + cldc = X(mkplan_d)(plnr, cldp); + if (!cldc) goto nada; + + pln = MKPLAN_RDFT2(P, &padt, p->kind == R2HC ? apply_r2hc : apply_hc2r); + + pln->cldr = cldr; + pln->cldc = cldc; + + pln->solver = ego; + X(ops_add)(&cldr->ops, &cldc->ops, &pln->super.super.ops); + + X(tensor_destroy4)(sz2i, vecszi, sz2, sz1); + + return &(pln->super.super); + + nada: + X(plan_destroy_internal)(cldr); + X(plan_destroy_internal)(cldc); + X(tensor_destroy4)(sz2i, vecszi, sz2, sz1); + return (plan *) 0; +} + +static solver *mksolver(int spltrnk, const int *buddies, int nbuddies) +{ + static const solver_adt sadt = { mkplan }; + S *slv = MKSOLVER(S, &sadt); + slv->spltrnk = spltrnk; + slv->buddies = buddies; + slv->nbuddies = nbuddies; + return &(slv->super); +} + +void X(rdft2_rank_geq2_register)(planner *p) +{ + int i; + static const int buddies[] = { 0, 1, -2 }; + + const int nbuddies = sizeof(buddies) / sizeof(buddies[0]); + + for (i = 0; i < nbuddies; ++i) + REGISTER_SOLVER(p, mksolver(buddies[i], buddies, nbuddies)); + + /* FIXME: Should we try more buddies? See also dft/rank-geq2. */ +} -- cgit v1.2.3