Chris@82: /*
Chris@82:  * Copyright (c) 2003, 2007-14 Matteo Frigo
Chris@82:  * Copyright (c) 2003, 2007-14 Massachusetts Institute of Technology
Chris@82:  *
Chris@82:  * This program is free software; you can redistribute it and/or modify
Chris@82:  * it under the terms of the GNU General Public License as published by
Chris@82:  * the Free Software Foundation; either version 2 of the License, or
Chris@82:  * (at your option) any later version.
Chris@82:  *
Chris@82:  * This program is distributed in the hope that it will be useful,
Chris@82:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
Chris@82:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
Chris@82:  * GNU General Public License for more details.
Chris@82:  *
Chris@82:  * You should have received a copy of the GNU General Public License
Chris@82:  * along with this program; if not, write to the Free Software
Chris@82:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
Chris@82:  *
Chris@82:  */
Chris@82: 
Chris@82: 
Chris@82: /* direct RDFT solver, using r2r codelets */
Chris@82: 
Chris@82: #include "rdft/rdft.h"
Chris@82: 
Chris@82: typedef struct {
Chris@82:      solver super;
Chris@82:      const kr2r_desc *desc;
Chris@82:      kr2r k;
Chris@82: } S;
Chris@82: 
Chris@82: typedef struct {
Chris@82:      plan_rdft super;
Chris@82: 
Chris@82:      INT vl, ivs, ovs;
Chris@82:      stride is, os;
Chris@82:      kr2r k;
Chris@82:      const S *slv;
Chris@82: } P;
Chris@82: 
Chris@82: static void apply(const plan *ego_, R *I, R *O)
Chris@82: {
Chris@82:      const P *ego = (const P *) ego_;
Chris@82:      ASSERT_ALIGNED_DOUBLE;
Chris@82:      ego->k(I, O, ego->is, ego->os, ego->vl, ego->ivs, ego->ovs);
Chris@82: }
Chris@82: 
Chris@82: static void destroy(plan *ego_)
Chris@82: {
Chris@82:      P *ego = (P *) ego_;
Chris@82:      X(stride_destroy)(ego->is);
Chris@82:      X(stride_destroy)(ego->os);
Chris@82: }
Chris@82: 
Chris@82: static void print(const plan *ego_, printer *p)
Chris@82: {
Chris@82:      const P *ego = (const P *) ego_;
Chris@82:      const S *s = ego->slv;
Chris@82: 
Chris@82:      p->print(p, "(rdft-%s-direct-r2r-%D%v \"%s\")", 
Chris@82: 	      X(rdft_kind_str)(s->desc->kind), s->desc->n,
Chris@82: 	      ego->vl, s->desc->nam);
Chris@82: }
Chris@82: 
Chris@82: static int applicable(const solver *ego_, const problem *p_)
Chris@82: {
Chris@82:      const S *ego = (const S *) ego_;
Chris@82:      const problem_rdft *p = (const problem_rdft *) p_;
Chris@82:      INT vl;
Chris@82:      INT ivs, ovs;
Chris@82: 
Chris@82:      return (
Chris@82: 	  1
Chris@82: 	  && p->sz->rnk == 1
Chris@82: 	  && p->vecsz->rnk <= 1
Chris@82: 	  && p->sz->dims[0].n == ego->desc->n
Chris@82: 	  && p->kind[0] == ego->desc->kind
Chris@82: 
Chris@82: 	  /* check strides etc */
Chris@82: 	  && X(tensor_tornk1)(p->vecsz, &vl, &ivs, &ovs)
Chris@82: 
Chris@82: 	  && (0
Chris@82: 	      /* can operate out-of-place */
Chris@82: 	      || p->I != p->O
Chris@82: 
Chris@82: 	      /* computing one transform */
Chris@82: 	      || vl == 1
Chris@82: 
Chris@82: 	      /* can operate in-place as long as strides are the same */
Chris@82: 	      || X(tensor_inplace_strides2)(p->sz, p->vecsz)
Chris@82: 	       )
Chris@82: 	  );
Chris@82: }
Chris@82: 
Chris@82: static plan *mkplan(const solver *ego_, const problem *p_, planner *plnr)
Chris@82: {
Chris@82:      const S *ego = (const S *) ego_;
Chris@82:      P *pln;
Chris@82:      const problem_rdft *p;
Chris@82:      iodim *d;
Chris@82: 
Chris@82:      static const plan_adt padt = {
Chris@82: 	  X(rdft_solve), X(null_awake), print, destroy
Chris@82:      };
Chris@82: 
Chris@82:      UNUSED(plnr);
Chris@82: 
Chris@82:      if (!applicable(ego_, p_))
Chris@82:           return (plan *)0;
Chris@82: 
Chris@82:      p = (const problem_rdft *) p_;
Chris@82: 
Chris@82: 
Chris@82:      pln = MKPLAN_RDFT(P, &padt, apply);
Chris@82: 
Chris@82:      d = p->sz->dims;
Chris@82: 
Chris@82:      pln->k = ego->k;
Chris@82: 
Chris@82:      pln->is = X(mkstride)(d->n, d->is);
Chris@82:      pln->os = X(mkstride)(d->n, d->os);
Chris@82: 
Chris@82:      X(tensor_tornk1)(p->vecsz, &pln->vl, &pln->ivs, &pln->ovs);
Chris@82: 
Chris@82:      pln->slv = ego;
Chris@82:      X(ops_zero)(&pln->super.super.ops);
Chris@82:      X(ops_madd2)(pln->vl / ego->desc->genus->vl,
Chris@82: 		  &ego->desc->ops,
Chris@82: 		  &pln->super.super.ops);
Chris@82: 
Chris@82:      pln->super.super.could_prune_now_p = 1;
Chris@82: 
Chris@82:      return &(pln->super.super);
Chris@82: }
Chris@82: 
Chris@82: /* constructor */
Chris@82: solver *X(mksolver_rdft_r2r_direct)(kr2r k, const kr2r_desc *desc)
Chris@82: {
Chris@82:      static const solver_adt sadt = { PROBLEM_RDFT, mkplan, 0 };
Chris@82:      S *slv = MKSOLVER(S, &sadt);
Chris@82:      slv->k = k;
Chris@82:      slv->desc = desc;
Chris@82:      return &(slv->super);
Chris@82: }
Chris@82: