/* Generic implementation of the EOSHIFT intrinsic
- Copyright 2002 Free Software Foundation, Inc.
+ Copyright 2002, 2005, 2007, 2009 Free Software Foundation, Inc.
Contributed by Paul Brook <paul@nowt.org>
This file is part of the GNU Fortran 95 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.
Ligbfortran 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., 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, 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 "config.h"
+#include "libgfortran.h"
#include <stdlib.h>
#include <assert.h>
#include <string.h>
-#include "libgfortran.h"
-
-static const char zeros[16] =
- {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
/* TODO: make this work for large shifts when
sizeof(int) < sizeof (index_type). */
static void
eoshift2 (gfc_array_char *ret, const gfc_array_char *array,
- int shift, const gfc_array_char *bound, int which)
+ int shift, const gfc_array_char *bound, int which,
+ const char *filler, index_type filler_len)
{
/* r.* indicates the return array. */
index_type rstride[GFC_MAX_DIMENSIONS];
index_type rstride0;
index_type roffset;
- char *rptr;
+ char * restrict rptr;
char *dest;
/* s.* indicates the source array. */
index_type sstride[GFC_MAX_DIMENSIONS];
index_type count[GFC_MAX_DIMENSIONS];
index_type extent[GFC_MAX_DIMENSIONS];
index_type dim;
- index_type size;
index_type len;
index_type n;
+ index_type arraysize;
+ index_type size;
- size = GFC_DESCRIPTOR_SIZE (ret);
+ /* The compiler cannot figure out that these are set, initialize
+ them to avoid warnings. */
+ len = 0;
+ soffset = 0;
+ roffset = 0;
+
+ size = GFC_DESCRIPTOR_SIZE (array);
+
+ arraysize = size0 ((array_t *) array);
if (ret->data == NULL)
{
int i;
- ret->data = internal_malloc_size (size * size0 ((array_t *)array));
- ret->base = 0;
+ ret->offset = 0;
ret->dtype = array->dtype;
for (i = 0; i < GFC_DESCRIPTOR_RANK (array); i++)
{
- ret->dim[i].lbound = 0;
- ret->dim[i].ubound = array->dim[i].ubound - array->dim[i].lbound;
+ index_type ub, str;
+
+ ub = GFC_DESCRIPTOR_EXTENT(array,i) - 1;
if (i == 0)
- ret->dim[i].stride = 1;
+ str = 1;
else
- ret->dim[i].stride = (ret->dim[i-1].ubound + 1) * ret->dim[i-1].stride;
+ str = GFC_DESCRIPTOR_EXTENT(ret,i-1)
+ * GFC_DESCRIPTOR_STRIDE(ret,i-1);
+
+ GFC_DIMENSION_SET(ret->dim[i], 0, ub, str);
+
+ if (arraysize > 0)
+ ret->data = internal_malloc_size (size * arraysize);
+ else
+ ret->data = internal_malloc_size (1);
+
}
}
+ else if (unlikely (compile_options.bounds_check))
+ {
+ bounds_equal_extents ((array_t *) ret, (array_t *) array,
+ "return value", "EOSHIFT");
+ }
+
+ if (arraysize == 0)
+ return;
which = which - 1;
extent[0] = 1;
count[0] = 0;
- size = GFC_DESCRIPTOR_SIZE (array);
+ sstride[0] = -1;
+ rstride[0] = -1;
+ bstride[0] = -1;
n = 0;
for (dim = 0; dim < GFC_DESCRIPTOR_RANK (array); dim++)
{
if (dim == which)
{
- roffset = ret->dim[dim].stride * size;
+ roffset = GFC_DESCRIPTOR_STRIDE_BYTES(ret,dim);
if (roffset == 0)
roffset = size;
- soffset = array->dim[dim].stride * size;
+ soffset = GFC_DESCRIPTOR_STRIDE_BYTES(array,dim);
if (soffset == 0)
soffset = size;
- 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 * size;
- sstride[n] = array->dim[dim].stride * size;
+ extent[n] = GFC_DESCRIPTOR_EXTENT(array,dim);
+ rstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(ret,dim);
+ sstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(array,dim);
if (bound)
- bstride[n] = bound->dim[n].stride * size;
+ bstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(bound,n);
else
bstride[n] = 0;
n++;
bstride0 = bstride[0];
rptr = ret->data;
sptr = array->data;
+
+ if ((shift >= 0 ? shift : -shift ) > len)
+ {
+ shift = len;
+ len = 0;
+ }
+ else
+ {
+ if (shift > 0)
+ len = len - shift;
+ else
+ len = len + shift;
+ }
+
if (bound)
bptr = bound->data;
else
- bptr = zeros;
-
- if (shift > 0)
- len = len - shift;
- else
- len = len + shift;
+ bptr = NULL;
while (rptr)
{
n = -shift;
}
- while (n--)
- {
- memcpy (dest, bptr, size);
- dest += roffset;
- }
+ if (bptr)
+ while (n--)
+ {
+ memcpy (dest, bptr, size);
+ dest += roffset;
+ }
+ else
+ while (n--)
+ {
+ index_type i;
+
+ if (filler_len == 1)
+ memset (dest, filler[0], size);
+ else
+ for (i = 0; i < size ; i += filler_len)
+ memcpy (&dest[i], filler, filler_len);
+
+ dest += roffset;
+ }
/* Advance to the next section. */
rptr += rstride0;
the next dimension. */
count[n] = 0;
/* We could precalculate these products, but this is a less
- frequently used path so proabably not worth it. */
+ frequently used path so probably not worth it. */
rptr -= rstride[n] * extent[n];
sptr -= sstride[n] * extent[n];
bptr -= bstride[n] * extent[n];
}
-extern void eoshift2_1 (gfc_array_char *, const gfc_array_char *,
- const GFC_INTEGER_1 *, const gfc_array_char *,
- const GFC_INTEGER_1 *);
-export_proto(eoshift2_1);
-
-void
-eoshift2_1 (gfc_array_char *ret, const gfc_array_char *array,
- const GFC_INTEGER_1 *pshift, const gfc_array_char *bound,
- const GFC_INTEGER_1 *pdim)
-{
- eoshift2 (ret, array, *pshift, bound, pdim ? *pdim : 1);
-}
-
-
-extern void eoshift2_2 (gfc_array_char *, const gfc_array_char *,
- const GFC_INTEGER_2 *, const gfc_array_char *,
- const GFC_INTEGER_2 *);
-export_proto(eoshift2_2);
-
-void
-eoshift2_2 (gfc_array_char *ret, const gfc_array_char *array,
- const GFC_INTEGER_2 *pshift, const gfc_array_char *bound,
- const GFC_INTEGER_2 *pdim)
-{
- eoshift2 (ret, array, *pshift, bound, pdim ? *pdim : 1);
-}
-
-
-extern void eoshift2_4 (gfc_array_char *, const gfc_array_char *,
- const GFC_INTEGER_4 *, const gfc_array_char *,
- const GFC_INTEGER_4 *);
-export_proto(eoshift2_4);
-
-void
-eoshift2_4 (gfc_array_char *ret, const gfc_array_char *array,
- const GFC_INTEGER_4 *pshift, const gfc_array_char *bound,
- const GFC_INTEGER_4 *pdim)
-{
- eoshift2 (ret, array, *pshift, bound, pdim ? *pdim : 1);
-}
-
-
-extern void eoshift2_8 (gfc_array_char *, const gfc_array_char *,
- const GFC_INTEGER_8 *, const gfc_array_char *,
- const GFC_INTEGER_8 *);
-export_proto(eoshift2_8);
-
-void
-eoshift2_8 (gfc_array_char *ret, const gfc_array_char *array,
- const GFC_INTEGER_8 *pshift, const gfc_array_char *bound,
- const GFC_INTEGER_8 *pdim)
-{
- eoshift2 (ret, array, *pshift, bound, pdim ? *pdim : 1);
-}
-
+#define DEFINE_EOSHIFT(N) \
+ extern void eoshift2_##N (gfc_array_char *, const gfc_array_char *, \
+ const GFC_INTEGER_##N *, const gfc_array_char *, \
+ const GFC_INTEGER_##N *); \
+ export_proto(eoshift2_##N); \
+ \
+ void \
+ eoshift2_##N (gfc_array_char *ret, const gfc_array_char *array, \
+ const GFC_INTEGER_##N *pshift, const gfc_array_char *pbound, \
+ const GFC_INTEGER_##N *pdim) \
+ { \
+ eoshift2 (ret, array, *pshift, pbound, pdim ? *pdim : 1, \
+ "\0", 1); \
+ } \
+ \
+ extern void eoshift2_##N##_char (gfc_array_char *, GFC_INTEGER_4, \
+ const gfc_array_char *, \
+ const GFC_INTEGER_##N *, \
+ const gfc_array_char *, \
+ const GFC_INTEGER_##N *, \
+ GFC_INTEGER_4, GFC_INTEGER_4); \
+ export_proto(eoshift2_##N##_char); \
+ \
+ void \
+ eoshift2_##N##_char (gfc_array_char *ret, \
+ GFC_INTEGER_4 ret_length __attribute__((unused)), \
+ const gfc_array_char *array, \
+ const GFC_INTEGER_##N *pshift, \
+ const gfc_array_char *pbound, \
+ const GFC_INTEGER_##N *pdim, \
+ GFC_INTEGER_4 array_length __attribute__((unused)), \
+ GFC_INTEGER_4 bound_length __attribute__((unused))) \
+ { \
+ eoshift2 (ret, array, *pshift, pbound, pdim ? *pdim : 1, \
+ " ", 1); \
+ } \
+ \
+ extern void eoshift2_##N##_char4 (gfc_array_char *, GFC_INTEGER_4, \
+ const gfc_array_char *, \
+ const GFC_INTEGER_##N *, \
+ const gfc_array_char *, \
+ const GFC_INTEGER_##N *, \
+ GFC_INTEGER_4, GFC_INTEGER_4); \
+ export_proto(eoshift2_##N##_char4); \
+ \
+ void \
+ eoshift2_##N##_char4 (gfc_array_char *ret, \
+ GFC_INTEGER_4 ret_length __attribute__((unused)), \
+ const gfc_array_char *array, \
+ const GFC_INTEGER_##N *pshift, \
+ const gfc_array_char *pbound, \
+ const GFC_INTEGER_##N *pdim, \
+ GFC_INTEGER_4 array_length __attribute__((unused)), \
+ GFC_INTEGER_4 bound_length __attribute__((unused))) \
+ { \
+ static const gfc_char4_t space = (unsigned char) ' '; \
+ eoshift2 (ret, array, *pshift, pbound, pdim ? *pdim : 1, \
+ (const char *) &space, \
+ sizeof (gfc_char4_t)); \
+ }
+
+DEFINE_EOSHIFT (1);
+DEFINE_EOSHIFT (2);
+DEFINE_EOSHIFT (4);
+DEFINE_EOSHIFT (8);
+#ifdef HAVE_GFC_INTEGER_16
+DEFINE_EOSHIFT (16);
+#endif
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