287 lines
8.1 KiB
C
287 lines
8.1 KiB
C
/* Generic implementation of the EOSHIFT intrinsic
|
|
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 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>
|
|
|
|
/* TODO: make this work for large shifts when
|
|
sizeof(int) < sizeof (index_type). */
|
|
|
|
static void
|
|
eoshift0 (gfc_array_char * ret, const gfc_array_char * array,
|
|
int shift, const char * pbound, int which, index_type size,
|
|
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 * restrict rptr;
|
|
char *dest;
|
|
/* s.* indicates the source array. */
|
|
index_type sstride[GFC_MAX_DIMENSIONS];
|
|
index_type sstride0;
|
|
index_type soffset;
|
|
const char *sptr;
|
|
const char *src;
|
|
|
|
index_type count[GFC_MAX_DIMENSIONS];
|
|
index_type extent[GFC_MAX_DIMENSIONS];
|
|
index_type dim;
|
|
index_type len;
|
|
index_type n;
|
|
|
|
/* The compiler cannot figure out that these are set, initialize
|
|
them to avoid warnings. */
|
|
len = 0;
|
|
soffset = 0;
|
|
roffset = 0;
|
|
|
|
if (ret->data == NULL)
|
|
{
|
|
int i;
|
|
|
|
ret->data = internal_malloc_size (size * size0 ((array_t *)array));
|
|
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;
|
|
|
|
if (i == 0)
|
|
ret->dim[i].stride = 1;
|
|
else
|
|
ret->dim[i].stride = (ret->dim[i-1].ubound + 1) * ret->dim[i-1].stride;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (size0 ((array_t *) ret) == 0)
|
|
return;
|
|
}
|
|
|
|
which = which - 1;
|
|
|
|
extent[0] = 1;
|
|
count[0] = 0;
|
|
sstride[0] = -1;
|
|
rstride[0] = -1;
|
|
n = 0;
|
|
for (dim = 0; dim < GFC_DESCRIPTOR_RANK (array); dim++)
|
|
{
|
|
if (dim == which)
|
|
{
|
|
roffset = ret->dim[dim].stride * size;
|
|
if (roffset == 0)
|
|
roffset = size;
|
|
soffset = array->dim[dim].stride * size;
|
|
if (soffset == 0)
|
|
soffset = size;
|
|
len = array->dim[dim].ubound + 1 - array->dim[dim].lbound;
|
|
}
|
|
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;
|
|
n++;
|
|
}
|
|
}
|
|
if (sstride[0] == 0)
|
|
sstride[0] = size;
|
|
if (rstride[0] == 0)
|
|
rstride[0] = size;
|
|
|
|
dim = GFC_DESCRIPTOR_RANK (array);
|
|
rstride0 = rstride[0];
|
|
sstride0 = sstride[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;
|
|
}
|
|
|
|
while (rptr)
|
|
{
|
|
/* Do the shift for this dimension. */
|
|
if (shift > 0)
|
|
{
|
|
src = &sptr[shift * soffset];
|
|
dest = rptr;
|
|
}
|
|
else
|
|
{
|
|
src = sptr;
|
|
dest = &rptr[-shift * roffset];
|
|
}
|
|
for (n = 0; n < len; n++)
|
|
{
|
|
memcpy (dest, src, size);
|
|
dest += roffset;
|
|
src += soffset;
|
|
}
|
|
if (shift >= 0)
|
|
{
|
|
n = shift;
|
|
}
|
|
else
|
|
{
|
|
dest = rptr;
|
|
n = -shift;
|
|
}
|
|
|
|
if (pbound)
|
|
while (n--)
|
|
{
|
|
memcpy (dest, pbound, 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;
|
|
sptr += sstride0;
|
|
count[0]++;
|
|
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. */
|
|
rptr -= rstride[n] * extent[n];
|
|
sptr -= sstride[n] * extent[n];
|
|
n++;
|
|
if (n >= dim - 1)
|
|
{
|
|
/* Break out of the loop. */
|
|
rptr = NULL;
|
|
break;
|
|
}
|
|
else
|
|
{
|
|
count[n]++;
|
|
rptr += rstride[n];
|
|
sptr += sstride[n];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
#define DEFINE_EOSHIFT(N) \
|
|
extern void eoshift0_##N (gfc_array_char *, const gfc_array_char *, \
|
|
const GFC_INTEGER_##N *, const char *, \
|
|
const GFC_INTEGER_##N *); \
|
|
export_proto(eoshift0_##N); \
|
|
\
|
|
void \
|
|
eoshift0_##N (gfc_array_char *ret, const gfc_array_char *array, \
|
|
const GFC_INTEGER_##N *pshift, const char *pbound, \
|
|
const GFC_INTEGER_##N *pdim) \
|
|
{ \
|
|
eoshift0 (ret, array, *pshift, pbound, pdim ? *pdim : 1, \
|
|
GFC_DESCRIPTOR_SIZE (array), "\0", 1); \
|
|
} \
|
|
\
|
|
extern void eoshift0_##N##_char (gfc_array_char *, GFC_INTEGER_4, \
|
|
const gfc_array_char *, \
|
|
const GFC_INTEGER_##N *, const char *, \
|
|
const GFC_INTEGER_##N *, GFC_INTEGER_4, \
|
|
GFC_INTEGER_4); \
|
|
export_proto(eoshift0_##N##_char); \
|
|
\
|
|
void \
|
|
eoshift0_##N##_char (gfc_array_char *ret, \
|
|
GFC_INTEGER_4 ret_length __attribute__((unused)), \
|
|
const gfc_array_char *array, \
|
|
const GFC_INTEGER_##N *pshift, \
|
|
const char *pbound, \
|
|
const GFC_INTEGER_##N *pdim, \
|
|
GFC_INTEGER_4 array_length, \
|
|
GFC_INTEGER_4 bound_length __attribute__((unused))) \
|
|
{ \
|
|
eoshift0 (ret, array, *pshift, pbound, pdim ? *pdim : 1, \
|
|
array_length, " ", 1); \
|
|
} \
|
|
\
|
|
extern void eoshift0_##N##_char4 (gfc_array_char *, GFC_INTEGER_4, \
|
|
const gfc_array_char *, \
|
|
const GFC_INTEGER_##N *, const char *, \
|
|
const GFC_INTEGER_##N *, GFC_INTEGER_4, \
|
|
GFC_INTEGER_4); \
|
|
export_proto(eoshift0_##N##_char4); \
|
|
\
|
|
void \
|
|
eoshift0_##N##_char4 (gfc_array_char *ret, \
|
|
GFC_INTEGER_4 ret_length __attribute__((unused)), \
|
|
const gfc_array_char *array, \
|
|
const GFC_INTEGER_##N *pshift, \
|
|
const char *pbound, \
|
|
const GFC_INTEGER_##N *pdim, \
|
|
GFC_INTEGER_4 array_length, \
|
|
GFC_INTEGER_4 bound_length __attribute__((unused))) \
|
|
{ \
|
|
static const gfc_char4_t space = (unsigned char) ' '; \
|
|
eoshift0 (ret, array, *pshift, pbound, pdim ? *pdim : 1, \
|
|
array_length * sizeof (gfc_char4_t), (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
|