File: direct-r2r.c

package info (click to toggle)
fftw3 3.3.8-2
  • links: PTS, VCS
  • area: main
  • in suites: bullseye, buster, sid
  • size: 28,428 kB
  • sloc: ansic: 259,592; ml: 5,474; sh: 4,442; perl: 1,648; makefile: 1,156; fortran: 110
file content (145 lines) | stat: -rw-r--r-- 3,487 bytes parent folder | download
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
/*
 * Copyright (c) 2003, 2007-14 Matteo Frigo
 * Copyright (c) 2003, 2007-14 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */


/* direct RDFT solver, using r2r codelets */

#include "rdft/rdft.h"

typedef struct {
     solver super;
     const kr2r_desc *desc;
     kr2r k;
} S;

typedef struct {
     plan_rdft super;

     INT vl, ivs, ovs;
     stride is, os;
     kr2r k;
     const S *slv;
} P;

static void apply(const plan *ego_, R *I, R *O)
{
     const P *ego = (const P *) ego_;
     ASSERT_ALIGNED_DOUBLE;
     ego->k(I, O, 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;

     p->print(p, "(rdft-%s-direct-r2r-%D%v \"%s\")", 
	      X(rdft_kind_str)(s->desc->kind), s->desc->n,
	      ego->vl, s->desc->nam);
}

static int applicable(const solver *ego_, const problem *p_)
{
     const S *ego = (const S *) ego_;
     const problem_rdft *p = (const problem_rdft *) p_;
     INT vl;
     INT ivs, ovs;

     return (
	  1
	  && p->sz->rnk == 1
	  && p->vecsz->rnk <= 1
	  && p->sz->dims[0].n == ego->desc->n
	  && p->kind[0] == ego->desc->kind

	  /* check strides etc */
	  && X(tensor_tornk1)(p->vecsz, &vl, &ivs, &ovs)

	  && (0
	      /* can operate out-of-place */
	      || p->I != p->O

	      /* computing one transform */
	      || vl == 1

	      /* can operate in-place as long as strides are the same */
	      || X(tensor_inplace_strides2)(p->sz, p->vecsz)
	       )
	  );
}

static plan *mkplan(const solver *ego_, const problem *p_, planner *plnr)
{
     const S *ego = (const S *) ego_;
     P *pln;
     const problem_rdft *p;
     iodim *d;

     static const plan_adt padt = {
	  X(rdft_solve), X(null_awake), print, destroy
     };

     UNUSED(plnr);

     if (!applicable(ego_, p_))
          return (plan *)0;

     p = (const problem_rdft *) p_;


     pln = MKPLAN_RDFT(P, &padt, apply);

     d = p->sz->dims;

     pln->k = ego->k;

     pln->is = X(mkstride)(d->n, d->is);
     pln->os = X(mkstride)(d->n, d->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 / ego->desc->genus->vl,
		  &ego->desc->ops,
		  &pln->super.super.ops);

     pln->super.super.could_prune_now_p = 1;

     return &(pln->super.super);
}

/* constructor */
solver *X(mksolver_rdft_r2r_direct)(kr2r k, const kr2r_desc *desc)
{
     static const solver_adt sadt = { PROBLEM_RDFT, mkplan, 0 };
     S *slv = MKSOLVER(S, &sadt);
     slv->k = k;
     slv->desc = desc;
     return &(slv->super);
}