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/*
* 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: problem2.c,v 1.1 2008/10/17 06:11:29 scuri Exp $ */
#include "dft.h"
#include "rdft.h"
#include <stddef.h>
static void destroy(problem *ego_)
{
problem_rdft2 *ego = (problem_rdft2 *) ego_;
X(tensor_destroy2)(ego->vecsz, ego->sz);
X(ifree)(ego_);
}
static void hash(const problem *p_, md5 *m)
{
const problem_rdft2 *p = (const problem_rdft2 *) p_;
X(md5puts)(m, "rdft2");
X(md5int)(m, p->r == p->rio);
X(md5int)(m, p->r == p->iio);
X(md5ptrdiff)(m, p->iio - p->rio);
X(md5int)(m, X(alignment_of)(p->r));
X(md5int)(m, X(alignment_of)(p->rio));
X(md5int)(m, X(alignment_of)(p->iio));
X(md5int)(m, p->kind);
X(tensor_md5)(m, p->sz);
X(tensor_md5)(m, p->vecsz);
}
static void print(problem *ego_, printer *p)
{
problem_rdft2 *ego = (problem_rdft2 *) ego_;
p->print(p, "(rdft2 %d %td %td %d %T %T)",
X(alignment_of)(ego->r),
ego->rio - ego->r,
ego->iio - ego->r,
(int)(ego->kind),
ego->sz,
ego->vecsz);
}
static void zero(const problem *ego_)
{
const problem_rdft2 *ego = (const problem_rdft2 *) ego_;
tensor *sz;
if (ego->kind == R2HC) {
sz = X(tensor_append)(ego->vecsz, ego->sz);
X(rdft_zerotens)(sz, UNTAINT(ego->r));
}
else {
tensor *sz2 = X(tensor_copy)(ego->sz);
if (sz2->rnk > 0) /* ~half as many complex outputs */
sz2->dims[0].n = sz2->dims[0].n / 2 + 1;
sz = X(tensor_append)(ego->vecsz, sz2);
X(tensor_destroy)(sz2);
X(dft_zerotens)(sz, UNTAINT(ego->rio), UNTAINT(ego->iio));
}
X(tensor_destroy)(sz);
}
static const problem_adt padt =
{
hash,
zero,
print,
destroy
};
int X(problem_rdft2_p)(const problem *p)
{
return (p->adt == &padt);
}
problem *X(mkproblem_rdft2)(const tensor *sz, const tensor *vecsz,
R *r, R *rio, R *iio, rdft_kind kind)
{
problem_rdft2 *ego =
(problem_rdft2 *)X(mkproblem)(sizeof(problem_rdft2), &padt);
A(X(tensor_kosherp)(sz));
A(X(tensor_kosherp)(vecsz));
A(FINITE_RNK(sz->rnk));
if (UNTAINT(r) == UNTAINT(rio))
r = rio = JOIN_TAINT(r, rio);
if (UNTAINT(r) == UNTAINT(iio))
r = iio = JOIN_TAINT(r, iio);
/* correctness condition: */
A(TAINTOF(rio) == TAINTOF(iio));
if (sz->rnk > 1) { /* have to compress rnk-1 dims separately, ugh */
tensor *szc = X(tensor_copy_except)(sz, sz->rnk - 1);
tensor *szr = X(tensor_copy_sub)(sz, sz->rnk - 1, 1);
tensor *szcc = X(tensor_compress)(szc);
if (szcc->rnk > 0)
ego->sz = X(tensor_append)(szcc, szr);
else
ego->sz = X(tensor_compress)(szr);
X(tensor_destroy2)(szc, szr); X(tensor_destroy)(szcc);
}
else
ego->sz = X(tensor_compress)(sz);
ego->vecsz = X(tensor_compress_contiguous)(vecsz);
ego->r = r;
ego->rio = rio;
ego->iio = iio;
ego->kind = kind;
A(kind == R2HC || kind == HC2R);
A(FINITE_RNK(ego->sz->rnk));
return &(ego->super);
}
/* Same as X(mkproblem_rdft2), but also destroy input tensors. */
problem *X(mkproblem_rdft2_d)(tensor *sz, tensor *vecsz,
R *r, R *rio, R *iio, rdft_kind kind)
{
problem *p;
p = X(mkproblem_rdft2)(sz, vecsz, r, rio, iio, kind);
X(tensor_destroy2)(vecsz, sz);
return p;
}
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