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Diffstat (limited to 'src/fftw3/rdft/problem2.c')
| -rw-r--r-- | src/fftw3/rdft/problem2.c | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/src/fftw3/rdft/problem2.c b/src/fftw3/rdft/problem2.c new file mode 100644 index 0000000..57a5764 --- /dev/null +++ b/src/fftw3/rdft/problem2.c @@ -0,0 +1,142 @@ +/* + * 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; +} |