1 /* Generic implementation of the EOSHIFT intrinsic
2 Copyright 2002, 2005 Free Software Foundation, Inc.
3 Contributed by Paul Brook <paul@nowt.org>
5 This file is part of the GNU Fortran 95 runtime library (libgfortran).
7 Libgfortran is free software; you can redistribute it and/or
8 modify it under the terms of the GNU General Public
9 License as published by the Free Software Foundation; either
10 version 2 of the License, or (at your option) any later version.
12 In addition to the permissions in the GNU General Public License, the
13 Free Software Foundation gives you unlimited permission to link the
14 compiled version of this file into combinations with other programs,
15 and to distribute those combinations without any restriction coming
16 from the use of this file. (The General Public License restrictions
17 do apply in other respects; for example, they cover modification of
18 the file, and distribution when not linked into a combine
21 Libgfortran is distributed in the hope that it will be useful,
22 but WITHOUT ANY WARRANTY; without even the implied warranty of
23 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 GNU General Public License for more details.
26 You should have received a copy of the GNU General Public
27 License along with libgfortran; see the file COPYING. If not,
28 write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
29 Boston, MA 02110-1301, USA. */
35 #include "libgfortran.h"
37 /* TODO: make this work for large shifts when
38 sizeof(int) < sizeof (index_type). */
41 eoshift0 (gfc_array_char
* ret
, const gfc_array_char
* array
,
42 int shift
, const char * pbound
, int which
, index_type size
,
45 /* r.* indicates the return array. */
46 index_type rstride
[GFC_MAX_DIMENSIONS
];
51 /* s.* indicates the source array. */
52 index_type sstride
[GFC_MAX_DIMENSIONS
];
58 index_type count
[GFC_MAX_DIMENSIONS
];
59 index_type extent
[GFC_MAX_DIMENSIONS
];
64 /* The compiler cannot figure out that these are set, initialize
65 them to avoid warnings. */
70 if (ret
->data
== NULL
)
74 ret
->data
= internal_malloc_size (size
* size0 ((array_t
*)array
));
76 ret
->dtype
= array
->dtype
;
77 for (i
= 0; i
< GFC_DESCRIPTOR_RANK (array
); i
++)
79 ret
->dim
[i
].lbound
= 0;
80 ret
->dim
[i
].ubound
= array
->dim
[i
].ubound
- array
->dim
[i
].lbound
;
83 ret
->dim
[i
].stride
= 1;
85 ret
->dim
[i
].stride
= (ret
->dim
[i
-1].ubound
+ 1) * ret
->dim
[i
-1].stride
;
96 for (dim
= 0; dim
< GFC_DESCRIPTOR_RANK (array
); dim
++)
100 roffset
= ret
->dim
[dim
].stride
* size
;
103 soffset
= array
->dim
[dim
].stride
* size
;
106 len
= array
->dim
[dim
].ubound
+ 1 - array
->dim
[dim
].lbound
;
111 extent
[n
] = array
->dim
[dim
].ubound
+ 1 - array
->dim
[dim
].lbound
;
112 rstride
[n
] = ret
->dim
[dim
].stride
* size
;
113 sstride
[n
] = array
->dim
[dim
].stride
* size
;
122 dim
= GFC_DESCRIPTOR_RANK (array
);
123 rstride0
= rstride
[0];
124 sstride0
= sstride
[0];
128 if ((shift
>= 0 ? shift
: -shift
) > len
)
143 /* Do the shift for this dimension. */
146 src
= &sptr
[shift
* soffset
];
152 dest
= &rptr
[-shift
* roffset
];
154 for (n
= 0; n
< len
; n
++)
156 memcpy (dest
, src
, size
);
173 memcpy (dest
, pbound
, size
);
179 memset (dest
, filler
, size
);
183 /* Advance to the next section. */
188 while (count
[n
] == extent
[n
])
190 /* When we get to the end of a dimension, reset it and increment
191 the next dimension. */
193 /* We could precalculate these products, but this is a less
194 frequently used path so probably not worth it. */
195 rptr
-= rstride
[n
] * extent
[n
];
196 sptr
-= sstride
[n
] * extent
[n
];
200 /* Break out of the loop. */
215 #define DEFINE_EOSHIFT(N) \
216 extern void eoshift0_##N (gfc_array_char *, const gfc_array_char *, \
217 const GFC_INTEGER_##N *, const char *, \
218 const GFC_INTEGER_##N *); \
219 export_proto(eoshift0_##N); \
222 eoshift0_##N (gfc_array_char *ret, const gfc_array_char *array, \
223 const GFC_INTEGER_##N *pshift, const char *pbound, \
224 const GFC_INTEGER_##N *pdim) \
226 eoshift0 (ret, array, *pshift, pbound, pdim ? *pdim : 1, \
227 GFC_DESCRIPTOR_SIZE (array), 0); \
230 extern void eoshift0_##N##_char (gfc_array_char *, GFC_INTEGER_4, \
231 const gfc_array_char *, \
232 const GFC_INTEGER_##N *, const char *, \
233 const GFC_INTEGER_##N *, GFC_INTEGER_4, \
235 export_proto(eoshift0_##N##_char); \
238 eoshift0_##N##_char (gfc_array_char *ret, \
239 GFC_INTEGER_4 ret_length __attribute__((unused)), \
240 const gfc_array_char *array, \
241 const GFC_INTEGER_##N *pshift, \
242 const char *pbound, \
243 const GFC_INTEGER_##N *pdim, \
244 GFC_INTEGER_4 array_length, \
245 GFC_INTEGER_4 bound_length __attribute__((unused))) \
247 eoshift0 (ret, array, *pshift, pbound, pdim ? *pdim : 1, \
248 array_length, ' '); \