diff src/fftw-3.3.5/dft/problem.c @ 42:2cd0e3b3e1fd

Current fftw source

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/fftw-3.3.5/dft/problem.c	Tue Oct 18 13:40:26 2016 +0100
@@ -0,0 +1,121 @@
+/*
+ * 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
+ *
+ */
+
+
+#include "dft.h"
+#include <stddef.h>
+
+static void destroy(problem *ego_)
+{
+     problem_dft *ego = (problem_dft *) ego_;
+     X(tensor_destroy2)(ego->vecsz, ego->sz);
+     X(ifree)(ego_);
+}
+
+static void hash(const problem *p_, md5 *m)
+{
+     const problem_dft *p = (const problem_dft *) p_;
+     X(md5puts)(m, "dft");
+     X(md5int)(m, p->ri == p->ro);
+     X(md5INT)(m, p->ii - p->ri);
+     X(md5INT)(m, p->io - p->ro);
+     X(md5int)(m, X(ialignment_of)(p->ri));
+     X(md5int)(m, X(ialignment_of)(p->ii));
+     X(md5int)(m, X(ialignment_of)(p->ro));
+     X(md5int)(m, X(ialignment_of)(p->io));
+     X(tensor_md5)(m, p->sz);
+     X(tensor_md5)(m, p->vecsz);
+}
+
+static void print(const problem *ego_, printer *p)
+{
+     const problem_dft *ego = (const problem_dft *) ego_;
+     p->print(p, "(dft %d %d %d %D %D %T %T)", 
+	      ego->ri == ego->ro,
+	      X(ialignment_of)(ego->ri),
+	      X(ialignment_of)(ego->ro),
+	      (INT)(ego->ii - ego->ri), 
+	      (INT)(ego->io - ego->ro),
+	      ego->sz,
+	      ego->vecsz);
+}
+
+static void zero(const problem *ego_)
+{
+     const problem_dft *ego = (const problem_dft *) ego_;
+     tensor *sz = X(tensor_append)(ego->vecsz, ego->sz);
+     X(dft_zerotens)(sz, UNTAINT(ego->ri), UNTAINT(ego->ii));
+     X(tensor_destroy)(sz);
+}
+
+static const problem_adt padt =
+{
+     PROBLEM_DFT,
+     hash,
+     zero,
+     print,
+     destroy
+};
+
+problem *X(mkproblem_dft)(const tensor *sz, const tensor *vecsz,
+			  R *ri, R *ii, R *ro, R *io)
+{
+     problem_dft *ego;
+
+     /* enforce pointer equality if untainted pointers are equal */
+     if (UNTAINT(ri) == UNTAINT(ro))
+	  ri = ro = JOIN_TAINT(ri, ro);
+     if (UNTAINT(ii) == UNTAINT(io))
+	  ii = io = JOIN_TAINT(ii, io);
+
+     /* more correctness conditions: */
+     A(TAINTOF(ri) == TAINTOF(ii));
+     A(TAINTOF(ro) == TAINTOF(io));
+
+     A(X(tensor_kosherp)(sz));
+     A(X(tensor_kosherp)(vecsz));
+
+     if (ri == ro || ii == io) {
+	  /* If either real or imag pointers are in place, both must be. */
+	  if (ri != ro || ii != io || !X(tensor_inplace_locations)(sz, vecsz))
+	       return X(mkproblem_unsolvable)();
+     }
+
+     ego = (problem_dft *)X(mkproblem)(sizeof(problem_dft), &padt);
+
+     ego->sz = X(tensor_compress)(sz);
+     ego->vecsz = X(tensor_compress_contiguous)(vecsz);
+     ego->ri = ri;
+     ego->ii = ii;
+     ego->ro = ro;
+     ego->io = io;
+
+     A(FINITE_RNK(ego->sz->rnk));
+     return &(ego->super);
+}
+
+/* Same as X(mkproblem_dft), but also destroy input tensors. */
+problem *X(mkproblem_dft_d)(tensor *sz, tensor *vecsz,
+			    R *ri, R *ii, R *ro, R *io)
+{
+     problem *p = X(mkproblem_dft)(sz, vecsz, ri, ii, ro, io);
+     X(tensor_destroy2)(vecsz, sz);
+     return p;
+}