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-rw-r--r--src/fftw3/rdft/rproblem.c235
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diff --git a/src/fftw3/rdft/rproblem.c b/src/fftw3/rdft/rproblem.c
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+++ b/src/fftw3/rdft/rproblem.c
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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: rproblem.c,v 1.1 2008/10/17 06:11:29 scuri Exp $ */
+
+#include "rdft.h"
+#include <stddef.h>
+
+static void destroy(problem *ego_)
+{
+ problem_rdft *ego = (problem_rdft *) ego_;
+#if !defined(STRUCT_HACK_C99) && !defined(STRUCT_HACK_KR)
+ X(ifree0)(ego->kind);
+#endif
+ X(tensor_destroy2)(ego->vecsz, ego->sz);
+ X(ifree)(ego_);
+}
+
+static void kind_hash(md5 *m, const rdft_kind *kind, int rnk)
+{
+ int i;
+ for (i = 0; i < rnk; ++i)
+ X(md5int)(m, kind[i]);
+}
+
+static void hash(const problem *p_, md5 *m)
+{
+ const problem_rdft *p = (const problem_rdft *) p_;
+ X(md5puts)(m, "rdft");
+ X(md5int)(m, p->I == p->O);
+ kind_hash(m, p->kind, p->sz->rnk);
+ X(md5int)(m, X(alignment_of)(p->I));
+ X(md5int)(m, X(alignment_of)(p->O));
+ X(tensor_md5)(m, p->sz);
+ X(tensor_md5)(m, p->vecsz);
+}
+
+static void recur(const iodim *dims, int rnk, R *I)
+{
+ if (rnk == RNK_MINFTY)
+ return;
+ else if (rnk == 0)
+ I[0] = K(0.0);
+ else if (rnk > 0) {
+ int i, n = dims[0].n;
+ int is = dims[0].is;
+
+ if (rnk == 1) {
+ /* this case is redundant but faster */
+ for (i = 0; i < n; ++i)
+ I[i * is] = K(0.0);
+ } else {
+ for (i = 0; i < n; ++i)
+ recur(dims + 1, rnk - 1, I + i * is);
+ }
+ }
+}
+
+void X(rdft_zerotens)(tensor *sz, R *I)
+{
+ recur(sz->dims, sz->rnk, I);
+}
+
+#define KSTR_LEN 8
+
+const char *X(rdft_kind_str)(rdft_kind kind)
+{
+ static const char kstr[][KSTR_LEN] = {
+ "r2hc", "r2hc01", "r2hc10", "r2hc11",
+ "hc2r", "hc2r01", "hc2r10", "hc2r11",
+ "dht",
+ "redft00", "redft01", "redft10", "redft11",
+ "rodft00", "rodft01", "rodft10", "rodft11"
+ };
+ A(kind >= 0 && kind < sizeof(kstr) / KSTR_LEN);
+ return kstr[kind];
+}
+
+static void print(problem *ego_, printer *p)
+{
+ const problem_rdft *ego = (const problem_rdft *) ego_;
+ int i;
+ p->print(p, "(rdft %d %td %T %T",
+ X(alignment_of)(ego->I),
+ ego->O - ego->I,
+ ego->sz,
+ ego->vecsz);
+ for (i = 0; i < ego->sz->rnk; ++i)
+ p->print(p, " %d", (int)ego->kind[i]);
+ p->print(p, ")");
+}
+
+static void zero(const problem *ego_)
+{
+ const problem_rdft *ego = (const problem_rdft *) ego_;
+ tensor *sz = X(tensor_append)(ego->vecsz, ego->sz);
+ X(rdft_zerotens)(sz, UNTAINT(ego->I));
+ X(tensor_destroy)(sz);
+}
+
+static const problem_adt padt =
+{
+ hash,
+ zero,
+ print,
+ destroy
+};
+
+int X(problem_rdft_p)(const problem *p)
+{
+ return (p->adt == &padt);
+}
+
+/* Dimensions of size 1 that are not REDFT/RODFT are no-ops and can be
+ eliminated. REDFT/RODFT unit dimensions often have factors of 2.0
+ and suchlike from normalization and phases, although in principle
+ these constant factors from different dimensions could be combined. */
+static int nontrivial(const iodim *d, rdft_kind kind)
+{
+ return (d->n > 1 || kind == R2HC11 || kind == HC2R11
+ || (REODFT_KINDP(kind) && kind != REDFT01 && kind != RODFT01));
+}
+
+problem *X(mkproblem_rdft)(const tensor *sz, const tensor *vecsz,
+ R *I, R *O, const rdft_kind *kind)
+{
+ problem_rdft *ego;
+ int rnk = sz->rnk;
+ int i;
+
+ A(X(tensor_kosherp)(sz));
+ A(X(tensor_kosherp)(vecsz));
+ A(FINITE_RNK(sz->rnk));
+
+ if (UNTAINT(I) == UNTAINT(O))
+ I = O = JOIN_TAINT(I, O);
+
+ for (i = rnk = 0; i < sz->rnk; ++i) {
+ A(sz->dims[i].n > 0);
+ if (nontrivial(sz->dims + i, kind[i]))
+ ++rnk;
+ }
+
+#if defined(STRUCT_HACK_KR)
+ ego = (problem_rdft *) X(mkproblem)(sizeof(problem_rdft)
+ + sizeof(rdft_kind)
+ * (rnk > 0 ? rnk - 1 : 0), &padt);
+#elif defined(STRUCT_HACK_C99)
+ ego = (problem_rdft *) X(mkproblem)(sizeof(problem_rdft)
+ + sizeof(rdft_kind) * rnk, &padt);
+#else
+ ego = (problem_rdft *) X(mkproblem)(sizeof(problem_rdft), &padt);
+ ego->kind = (rdft_kind *) MALLOC(sizeof(rdft_kind) * rnk, PROBLEMS);
+#endif
+
+ /* do compression and sorting as in X(tensor_compress), but take
+ transform kind into account (sigh) */
+ ego->sz = X(mktensor)(rnk);
+ for (i = rnk = 0; i < sz->rnk; ++i) {
+ if (nontrivial(sz->dims + i, kind[i])) {
+ ego->kind[rnk] = kind[i];
+ ego->sz->dims[rnk++] = sz->dims[i];
+ }
+ }
+ for (i = 0; i + 1 < rnk; ++i) {
+ int j;
+ for (j = i + 1; j < rnk; ++j)
+ if (X(dimcmp)(ego->sz->dims + i, ego->sz->dims + j) > 0) {
+ iodim dswap;
+ rdft_kind kswap;
+ dswap = ego->sz->dims[i];
+ ego->sz->dims[i] = ego->sz->dims[j];
+ ego->sz->dims[j] = dswap;
+ kswap = ego->kind[i];
+ ego->kind[i] = ego->kind[j];
+ ego->kind[j] = kswap;
+ }
+ }
+
+ for (i = 0; i < rnk; ++i)
+ if (ego->sz->dims[i].n == 2 && (ego->kind[i] == REDFT00
+ || ego->kind[i] == DHT
+ || ego->kind[i] == HC2R))
+ ego->kind[i] = R2HC; /* size-2 transforms are equivalent */
+
+ ego->vecsz = X(tensor_compress_contiguous)(vecsz);
+ ego->I = I;
+ ego->O = O;
+
+ A(FINITE_RNK(ego->sz->rnk));
+
+ return &(ego->super);
+}
+
+/* Same as X(mkproblem_rdft), but also destroy input tensors. */
+problem *X(mkproblem_rdft_d)(tensor *sz, tensor *vecsz,
+ R *I, R *O, const rdft_kind *kind)
+{
+ problem *p;
+ p = X(mkproblem_rdft)(sz, vecsz, I, O, kind);
+ X(tensor_destroy2)(vecsz, sz);
+ return p;
+}
+
+/* As above, but for rnk <= 1 only and takes a scalar kind parameter */
+problem *X(mkproblem_rdft_1)(const tensor *sz, const tensor *vecsz,
+ R *I, R *O, rdft_kind kind)
+{
+ A(sz->rnk <= 1);
+ return X(mkproblem_rdft)(sz, vecsz, I, O, &kind);
+}
+
+problem *X(mkproblem_rdft_1_d)(tensor *sz, tensor *vecsz,
+ R *I, R *O, rdft_kind kind)
+{
+ A(sz->rnk <= 1);
+ return X(mkproblem_rdft_d)(sz, vecsz, I, O, &kind);
+}
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