108 lines
2.8 KiB
C
108 lines
2.8 KiB
C
/* Helper function for repacking arrays.
|
|
Copyright (C) 2003-2015 Free Software Foundation, Inc.
|
|
Contributed by Paul Brook <paul@nowt.org>
|
|
|
|
This file is part of the GNU Fortran runtime library (libgfortran).
|
|
|
|
Libgfortran 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 3 of the License, or (at your option) any later version.
|
|
|
|
Libgfortran 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.
|
|
|
|
Under Section 7 of GPL version 3, you are granted additional
|
|
permissions described in the GCC Runtime Library Exception, version
|
|
3.1, as published by the Free Software Foundation.
|
|
|
|
You should have received a copy of the GNU General Public License and
|
|
a copy of the GCC Runtime Library Exception along with this program;
|
|
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include "libgfortran.h"
|
|
#include <stdlib.h>
|
|
#include <assert.h>
|
|
#include <string.h>
|
|
|
|
|
|
#if defined (HAVE_GFC_REAL_8)
|
|
|
|
void
|
|
internal_unpack_r8 (gfc_array_r8 * d, const GFC_REAL_8 * src)
|
|
{
|
|
index_type count[GFC_MAX_DIMENSIONS];
|
|
index_type extent[GFC_MAX_DIMENSIONS];
|
|
index_type stride[GFC_MAX_DIMENSIONS];
|
|
index_type stride0;
|
|
index_type dim;
|
|
index_type dsize;
|
|
GFC_REAL_8 * restrict dest;
|
|
int n;
|
|
|
|
dest = d->base_addr;
|
|
if (src == dest || !src)
|
|
return;
|
|
|
|
dim = GFC_DESCRIPTOR_RANK (d);
|
|
dsize = 1;
|
|
for (n = 0; n < dim; n++)
|
|
{
|
|
count[n] = 0;
|
|
stride[n] = GFC_DESCRIPTOR_STRIDE(d,n);
|
|
extent[n] = GFC_DESCRIPTOR_EXTENT(d,n);
|
|
if (extent[n] <= 0)
|
|
return;
|
|
|
|
if (dsize == stride[n])
|
|
dsize *= extent[n];
|
|
else
|
|
dsize = 0;
|
|
}
|
|
|
|
if (dsize != 0)
|
|
{
|
|
memcpy (dest, src, dsize * sizeof (GFC_REAL_8));
|
|
return;
|
|
}
|
|
|
|
stride0 = stride[0];
|
|
|
|
while (dest)
|
|
{
|
|
/* Copy the data. */
|
|
*dest = *(src++);
|
|
/* Advance to the next element. */
|
|
dest += stride0;
|
|
count[0]++;
|
|
/* Advance to the next source element. */
|
|
n = 0;
|
|
while (count[n] == extent[n])
|
|
{
|
|
/* When we get to the end of a dimension, reset it and increment
|
|
the next dimension. */
|
|
count[n] = 0;
|
|
/* We could precalculate these products, but this is a less
|
|
frequently used path so probably not worth it. */
|
|
dest -= stride[n] * extent[n];
|
|
n++;
|
|
if (n == dim)
|
|
{
|
|
dest = NULL;
|
|
break;
|
|
}
|
|
else
|
|
{
|
|
count[n]++;
|
|
dest += stride[n];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
#endif
|
|
|