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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: tensor4.c,v 1.1 2008/10/17 06:11:29 scuri Exp $ */
#include "ifftw.h"
int X(tensor_max_index)(const tensor *sz)
{
int i;
int n = 0;
A(FINITE_RNK(sz->rnk));
for (i = 0; i < sz->rnk; ++i) {
const iodim *p = sz->dims + i;
n += (p->n - 1) * X(imax)(X(iabs)(p->is), X(iabs)(p->os));
}
return n;
}
#define tensor_min_xstride(sz, xs) { \
A(FINITE_RNK(sz->rnk)); \
if (sz->rnk == 0) return 0; \
else { \
int i; \
int s = X(iabs)(sz->dims[0].xs); \
for (i = 1; i < sz->rnk; ++i) \
s = X(imin)(s, X(iabs)(sz->dims[i].xs)); \
return s; \
} \
}
int X(tensor_min_istride)(const tensor *sz) tensor_min_xstride(sz, is)
int X(tensor_min_ostride)(const tensor *sz) tensor_min_xstride(sz, os)
int X(tensor_min_stride)(const tensor *sz)
{
return X(imin)(X(tensor_min_istride)(sz), X(tensor_min_ostride)(sz));
}
int X(tensor_inplace_strides)(const tensor *sz)
{
int i;
A(FINITE_RNK(sz->rnk));
for (i = 0; i < sz->rnk; ++i) {
const iodim *p = sz->dims + i;
if (p->is != p->os)
return 0;
}
return 1;
}
int X(tensor_inplace_strides2)(const tensor *a, const tensor *b)
{
return X(tensor_inplace_strides(a)) && X(tensor_inplace_strides(b));
}
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