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: /* plans for vrank -infty DFTs (nothing to do) */
Chris@82: 
Chris@82: #include "dft/dft.h"
Chris@82: 
Chris@82: static void apply(const plan *ego_, R *ri, R *ii, R *ro, R *io)
Chris@82: {
Chris@82:      UNUSED(ego_);
Chris@82:      UNUSED(ri);
Chris@82:      UNUSED(ii);
Chris@82:      UNUSED(ro);
Chris@82:      UNUSED(io);
Chris@82: }
Chris@82: 
Chris@82: static int applicable(const solver *ego_, const problem *p_)
Chris@82: {
Chris@82:      const problem_dft *p = (const problem_dft *) p_;
Chris@82: 
Chris@82:      UNUSED(ego_);
Chris@82: 
Chris@82:      return 0
Chris@82: 	  /* case 1 : -infty vector rank */
Chris@82: 	  || (!FINITE_RNK(p->vecsz->rnk))
Chris@82: 
Chris@82: 	  /* case 2 : rank-0 in-place dft */
Chris@82: 	  || (1
Chris@82: 	      && p->sz->rnk == 0
Chris@82: 	      && FINITE_RNK(p->vecsz->rnk)
Chris@82: 	      && p->ro == p->ri
Chris@82: 	      && X(tensor_inplace_strides)(p->vecsz)
Chris@82: 	       );
Chris@82: }
Chris@82: 
Chris@82: static void print(const plan *ego, printer *p)
Chris@82: {
Chris@82:      UNUSED(ego);
Chris@82:      p->print(p, "(dft-nop)");
Chris@82: }
Chris@82: 
Chris@82: static plan *mkplan(const solver *ego, const problem *p, planner *plnr)
Chris@82: {
Chris@82:      static const plan_adt padt = {
Chris@82: 	  X(dft_solve), X(null_awake), print, X(plan_null_destroy)
Chris@82:      };
Chris@82:      plan_dft *pln;
Chris@82: 
Chris@82:      UNUSED(plnr);
Chris@82: 
Chris@82:      if (!applicable(ego, p))
Chris@82:           return (plan *) 0;
Chris@82:      pln = MKPLAN_DFT(plan_dft, &padt, apply);
Chris@82:      X(ops_zero)(&pln->super.ops);
Chris@82: 
Chris@82:      return &(pln->super);
Chris@82: }
Chris@82: 
Chris@82: static solver *mksolver(void)
Chris@82: {
Chris@82:      static const solver_adt sadt = { PROBLEM_DFT, mkplan, 0 };
Chris@82:      return MKSOLVER(solver, &sadt);
Chris@82: }
Chris@82: 
Chris@82: void X(dft_nop_register)(planner *p)
Chris@82: {
Chris@82:      REGISTER_SOLVER(p, mksolver());
Chris@82: }