105 lines
3.2 KiB
C
105 lines
3.2 KiB
C
/*
|
|
* 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 "kernel/ifftw.h"
|
|
|
|
INT X(tensor_max_index)(const tensor *sz)
|
|
{
|
|
int i;
|
|
INT ni = 0, no = 0;
|
|
|
|
A(FINITE_RNK(sz->rnk));
|
|
for (i = 0; i < sz->rnk; ++i) {
|
|
const iodim *p = sz->dims + i;
|
|
ni += (p->n - 1) * X(iabs)(p->is);
|
|
no += (p->n - 1) * X(iabs)(p->os);
|
|
}
|
|
return X(imax)(ni, no);
|
|
}
|
|
|
|
#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));
|
|
}
|
|
|
|
/* return true (1) iff *any* strides of sz decrease when we
|
|
tensor_inplace_copy(sz, k). */
|
|
static int tensor_strides_decrease(const tensor *sz, inplace_kind k)
|
|
{
|
|
if (FINITE_RNK(sz->rnk)) {
|
|
int i;
|
|
for (i = 0; i < sz->rnk; ++i)
|
|
if ((sz->dims[i].os - sz->dims[i].is)
|
|
* (k == INPLACE_OS ? (INT)1 : (INT)-1) < 0)
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* Return true (1) iff *any* strides of sz decrease when we
|
|
tensor_inplace_copy(k) *or* if *all* strides of sz are unchanged
|
|
but *any* strides of vecsz decrease. This is used in indirect.c
|
|
to determine whether to use INPLACE_IS or INPLACE_OS.
|
|
|
|
Note: X(tensor_strides_decrease)(sz, vecsz, INPLACE_IS)
|
|
|| X(tensor_strides_decrease)(sz, vecsz, INPLACE_OS)
|
|
|| X(tensor_inplace_strides2)(p->sz, p->vecsz)
|
|
must always be true. */
|
|
int X(tensor_strides_decrease)(const tensor *sz, const tensor *vecsz,
|
|
inplace_kind k)
|
|
{
|
|
return(tensor_strides_decrease(sz, k)
|
|
|| (X(tensor_inplace_strides)(sz)
|
|
&& tensor_strides_decrease(vecsz, k)));
|
|
}
|