/* Helper function for cshift functions.
- Copyright 2008 Free Software Foundation, Inc.
+ Copyright (C) 2008-2013 Free Software Foundation, Inc.
Contributed by Thomas Koenig <tkoenig@gcc.gnu.org>
-This file is part of the GNU Fortran 95 runtime library (libgfortran).
+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 2 of the License, or (at your option) any later version.
-
-In addition to the permissions in the GNU General Public License, the
-Free Software Foundation gives you unlimited permission to link the
-compiled version of this file into combinations with other programs,
-and to distribute those combinations without any restriction coming
-from the use of this file. (The General Public License restrictions
-do apply in other respects; for example, they cover modification of
-the file, and distribution when not linked into a combine
-executable.)
+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.
-You should have received a copy of the GNU General Public
-License along with libgfortran; see the file COPYING. If not,
-write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
-Boston, MA 02110-1301, USA. */
+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>
#if defined (HAVE_GFC_REAL_16)
void
-cshift0_r16 (gfc_array_r16 *ret, const gfc_array_r16 *array, ssize_t shift,
+cshift0_r16 (gfc_array_r16 *ret, const gfc_array_r16 *array, ptrdiff_t shift,
int which)
{
/* r.* indicates the return array. */
{
if (dim == which)
{
- roffset = ret->dim[dim].stride;
+ roffset = GFC_DESCRIPTOR_STRIDE(ret,dim);
if (roffset == 0)
roffset = 1;
- soffset = array->dim[dim].stride;
+ soffset = GFC_DESCRIPTOR_STRIDE(array,dim);
if (soffset == 0)
soffset = 1;
- len = array->dim[dim].ubound + 1 - array->dim[dim].lbound;
+ len = GFC_DESCRIPTOR_EXTENT(array,dim);
}
else
{
count[n] = 0;
- extent[n] = array->dim[dim].ubound + 1 - array->dim[dim].lbound;
- rstride[n] = ret->dim[dim].stride;
- sstride[n] = array->dim[dim].stride;
+ extent[n] = GFC_DESCRIPTOR_EXTENT(array,dim);
+ rstride[n] = GFC_DESCRIPTOR_STRIDE(ret,dim);
+ sstride[n] = GFC_DESCRIPTOR_STRIDE(array,dim);
n++;
}
}
dim = GFC_DESCRIPTOR_RANK (array);
rstride0 = rstride[0];
sstride0 = sstride[0];
- rptr = ret->data;
- sptr = array->data;
+ rptr = ret->base_addr;
+ sptr = array->base_addr;
- shift = len == 0 ? 0 : shift % (ssize_t)len;
- if (shift < 0)
- shift += len;
+ /* Avoid the costly modulo for trivially in-bound shifts. */
+ if (shift < 0 || shift >= len)
+ {
+ shift = len == 0 ? 0 : shift % (ptrdiff_t)len;
+ if (shift < 0)
+ shift += len;
+ }
while (rptr)
{