1 /* 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 #if defined (HAVE_GFC_INTEGER_8)
40 eoshift3 (gfc_array_char
*ret
, const gfc_array_char
*array
, const gfc_array_i8
*h
,
41 const gfc_array_char
*bound
, const GFC_INTEGER_8
*pwhich
,
42 index_type size
, char filler
)
44 /* r.* indicates the return array. */
45 index_type rstride
[GFC_MAX_DIMENSIONS
];
50 /* s.* indicates the source array. */
51 index_type sstride
[GFC_MAX_DIMENSIONS
];
56 /* h.* indicates the shift array. */
57 index_type hstride
[GFC_MAX_DIMENSIONS
];
59 const GFC_INTEGER_8
*hptr
;
60 /* b.* indicates the bound array. */
61 index_type bstride
[GFC_MAX_DIMENSIONS
];
65 index_type count
[GFC_MAX_DIMENSIONS
];
66 index_type extent
[GFC_MAX_DIMENSIONS
];
74 /* The compiler cannot figure out that these are set, initialize
75 them to avoid warnings. */
85 if (ret
->data
== NULL
)
89 ret
->data
= internal_malloc_size (size
* size0 ((array_t
*)array
));
91 ret
->dtype
= array
->dtype
;
92 for (i
= 0; i
< GFC_DESCRIPTOR_RANK (array
); i
++)
94 ret
->dim
[i
].lbound
= 0;
95 ret
->dim
[i
].ubound
= array
->dim
[i
].ubound
- array
->dim
[i
].lbound
;
98 ret
->dim
[i
].stride
= 1;
100 ret
->dim
[i
].stride
= (ret
->dim
[i
-1].ubound
+ 1) * ret
->dim
[i
-1].stride
;
108 for (dim
= 0; dim
< GFC_DESCRIPTOR_RANK (array
); dim
++)
112 roffset
= ret
->dim
[dim
].stride
* size
;
115 soffset
= array
->dim
[dim
].stride
* size
;
118 len
= array
->dim
[dim
].ubound
+ 1 - array
->dim
[dim
].lbound
;
123 extent
[n
] = array
->dim
[dim
].ubound
+ 1 - array
->dim
[dim
].lbound
;
124 rstride
[n
] = ret
->dim
[dim
].stride
* size
;
125 sstride
[n
] = array
->dim
[dim
].stride
* size
;
127 hstride
[n
] = h
->dim
[n
].stride
;
129 bstride
[n
] = bound
->dim
[n
].stride
* size
;
141 if (bound
&& bstride
[0] == 0)
144 dim
= GFC_DESCRIPTOR_RANK (array
);
145 rstride0
= rstride
[0];
146 sstride0
= sstride
[0];
147 hstride0
= hstride
[0];
148 bstride0
= bstride
[0];
159 /* Do the shift for this dimension. */
161 if (( sh
>= 0 ? sh
: -sh
) > len
)
167 delta
= (sh
>= 0) ? sh
: -sh
;
171 src
= &sptr
[delta
* soffset
];
177 dest
= &rptr
[delta
* roffset
];
179 for (n
= 0; n
< len
- delta
; n
++)
181 memcpy (dest
, src
, size
);
192 memcpy (dest
, bptr
, size
);
198 memset (dest
, filler
, size
);
202 /* Advance to the next section. */
209 while (count
[n
] == extent
[n
])
211 /* When we get to the end of a dimension, reset it and increment
212 the next dimension. */
214 /* We could precalculate these products, but this is a less
215 frequently used path so proabably not worth it. */
216 rptr
-= rstride
[n
] * extent
[n
];
217 sptr
-= sstride
[n
] * extent
[n
];
218 hptr
-= hstride
[n
] * extent
[n
];
219 bptr
-= bstride
[n
] * extent
[n
];
223 /* Break out of the loop. */
239 extern void eoshift3_8 (gfc_array_char
*, const gfc_array_char
*,
240 const gfc_array_i8
*, const gfc_array_char
*,
241 const GFC_INTEGER_8
*);
242 export_proto(eoshift3_8
);
245 eoshift3_8 (gfc_array_char
*ret
, const gfc_array_char
*array
,
246 const gfc_array_i8
*h
, const gfc_array_char
*bound
,
247 const GFC_INTEGER_8
*pwhich
)
249 eoshift3 (ret
, array
, h
, bound
, pwhich
, GFC_DESCRIPTOR_SIZE (array
), 0);
252 extern void eoshift3_8_char (gfc_array_char
*, GFC_INTEGER_4
,
253 const gfc_array_char
*,
254 const gfc_array_i8
*,
255 const gfc_array_char
*,
256 const GFC_INTEGER_8
*, GFC_INTEGER_4
,
258 export_proto(eoshift3_8_char
);
261 eoshift3_8_char (gfc_array_char
*ret
,
262 GFC_INTEGER_4 ret_length
__attribute__((unused
)),
263 const gfc_array_char
*array
, const gfc_array_i8
*h
,
264 const gfc_array_char
*bound
,
265 const GFC_INTEGER_8
*pwhich
,
266 GFC_INTEGER_4 array_length
,
267 GFC_INTEGER_4 bound_length
268 __attribute__((unused
)))
270 eoshift3 (ret
, array
, h
, bound
, pwhich
, array_length
, ' ');