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Diffstat (limited to 'src/fftw3/dft/direct.c')
| -rw-r--r-- | src/fftw3/dft/direct.c | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/src/fftw3/dft/direct.c b/src/fftw3/dft/direct.c new file mode 100644 index 0000000..cb11c88 --- /dev/null +++ b/src/fftw3/dft/direct.c @@ -0,0 +1,152 @@ +/* + * 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: direct.c,v 1.1 2008/10/17 06:11:08 scuri Exp $ */ + +/* direct DFT solver, if we have a codelet */ + +#include "dft.h" + +typedef struct { + solver super; + const kdft_desc *desc; + kdft k; +} S; + +typedef struct { + plan_dft super; + + stride is, os; + int vl; + int ivs, ovs; + kdft k; + const S *slv; +} P; + +static void apply(const plan *ego_, R *ri, R *ii, R *ro, R *io) +{ + const P *ego = (const P *) ego_; + ASSERT_ALIGNED_DOUBLE; + ego->k(ri, ii, ro, io, ego->is, ego->os, ego->vl, ego->ivs, ego->ovs); +} + +static void destroy(plan *ego_) +{ + P *ego = (P *) ego_; + X(stride_destroy)(ego->is); + X(stride_destroy)(ego->os); +} + +static void print(const plan *ego_, printer *p) +{ + const P *ego = (const P *) ego_; + const S *s = ego->slv; + const kdft_desc *d = s->desc; + + p->print(p, "(dft-direct-%d%v \"%s\")", d->sz, ego->vl, d->nam); +} + +static int applicable(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_; + const kdft_desc *d = ego->desc; + int vl; + int ivs, ovs; + + return ( + 1 + && p->sz->rnk == 1 + && p->vecsz->rnk <= 1 + && p->sz->dims[0].n == d->sz + + /* check strides etc */ + && X(tensor_tornk1)(p->vecsz, &vl, &ivs, &ovs) + + && (d->genus->okp(d, p->ri, p->ii, p->ro, p->io, + p->sz->dims[0].is, p->sz->dims[0].os, + vl, ivs, ovs, plnr)) + + && (0 + /* can operate out-of-place */ + || p->ri != p->ro + + /* + * can compute one transform in-place, no matter + * what the strides are. + */ + || p->vecsz->rnk == 0 + + /* can operate in-place as long as strides are the same */ + || (X(tensor_inplace_strides2)(p->sz, p->vecsz)) + ) + ); + } + + return 0; +} + +static plan *mkplan(const solver *ego_, const problem *p_, planner *plnr) +{ + const S *ego = (const S *) ego_; + P *pln; + const problem_dft *p; + iodim *d; + const kdft_desc *e = ego->desc; + + static const plan_adt padt = { + X(dft_solve), X(null_awake), print, destroy + }; + + UNUSED(plnr); + + if (!applicable(ego_, p_, plnr)) + return (plan *)0; + + p = (const problem_dft *) p_; + + pln = MKPLAN_DFT(P, &padt, apply); + + d = p->sz->dims; + + pln->k = ego->k; + pln->is = X(mkstride)(e->sz, d[0].is); + pln->os = X(mkstride)(e->sz, d[0].os); + + X(tensor_tornk1)(p->vecsz, &pln->vl, &pln->ivs, &pln->ovs); + pln->slv = ego; + + X(ops_zero)(&pln->super.super.ops); + X(ops_madd2)(pln->vl / e->genus->vl, &e->ops, &pln->super.super.ops); + + return &(pln->super.super); +} + +/* constructor */ +solver *X(mksolver_dft_direct)(kdft k, const kdft_desc *desc) +{ + static const solver_adt sadt = { mkplan }; + S *slv = MKSOLVER(S, &sadt); + slv->k = k; + slv->desc = desc; + return &(slv->super); +} |