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 eoshift1 (gfc_array_char
* const restrict ret
,
41 const gfc_array_char
* const restrict array
,
42 const gfc_array_i8
* const restrict h
,
43 const char * const restrict pbound
,
44 const GFC_INTEGER_8
* const restrict pwhich
,
45 index_type size
, char filler
)
47 /* r.* indicates the return array. */
48 index_type rstride
[GFC_MAX_DIMENSIONS
];
53 /* s.* indicates the source array. */
54 index_type sstride
[GFC_MAX_DIMENSIONS
];
59 /* h.* indicates the shift array. */
60 index_type hstride
[GFC_MAX_DIMENSIONS
];
62 const GFC_INTEGER_8
*hptr
;
64 index_type count
[GFC_MAX_DIMENSIONS
];
65 index_type extent
[GFC_MAX_DIMENSIONS
];
73 /* The compiler cannot figure out that these are set, initialize
74 them to avoid warnings. */
87 if (ret
->data
== NULL
)
91 ret
->data
= internal_malloc_size (size
* size0 ((array_t
*)array
));
93 ret
->dtype
= array
->dtype
;
94 for (i
= 0; i
< GFC_DESCRIPTOR_RANK (array
); i
++)
96 ret
->dim
[i
].lbound
= 0;
97 ret
->dim
[i
].ubound
= array
->dim
[i
].ubound
- array
->dim
[i
].lbound
;
100 ret
->dim
[i
].stride
= 1;
102 ret
->dim
[i
].stride
= (ret
->dim
[i
-1].ubound
+ 1) * ret
->dim
[i
-1].stride
;
107 for (dim
= 0; dim
< GFC_DESCRIPTOR_RANK (array
); dim
++)
111 roffset
= ret
->dim
[dim
].stride
* size
;
114 soffset
= array
->dim
[dim
].stride
* size
;
117 len
= array
->dim
[dim
].ubound
+ 1 - array
->dim
[dim
].lbound
;
122 extent
[n
] = array
->dim
[dim
].ubound
+ 1 - array
->dim
[dim
].lbound
;
123 rstride
[n
] = ret
->dim
[dim
].stride
* size
;
124 sstride
[n
] = array
->dim
[dim
].stride
* size
;
126 hstride
[n
] = h
->dim
[n
].stride
;
137 dim
= GFC_DESCRIPTOR_RANK (array
);
138 rstride0
= rstride
[0];
139 sstride0
= sstride
[0];
140 hstride0
= hstride
[0];
147 /* Do the shift for this dimension. */
149 if (( sh
>= 0 ? sh
: -sh
) > len
)
155 delta
= (sh
>= 0) ? sh
: -sh
;
159 src
= &sptr
[delta
* soffset
];
165 dest
= &rptr
[delta
* roffset
];
167 for (n
= 0; n
< len
- delta
; n
++)
169 memcpy (dest
, src
, size
);
180 memcpy (dest
, pbound
, size
);
186 memset (dest
, filler
, size
);
190 /* Advance to the next section. */
196 while (count
[n
] == extent
[n
])
198 /* When we get to the end of a dimension, reset it and increment
199 the next dimension. */
201 /* We could precalculate these products, but this is a less
202 frequently used path so proabably not worth it. */
203 rptr
-= rstride
[n
] * extent
[n
];
204 sptr
-= sstride
[n
] * extent
[n
];
205 hptr
-= hstride
[n
] * extent
[n
];
209 /* Break out of the loop. */
224 void eoshift1_8 (gfc_array_char
* const restrict
,
225 const gfc_array_char
* const restrict
,
226 const gfc_array_i8
* const restrict
, const char * const restrict
,
227 const GFC_INTEGER_8
* const restrict
);
228 export_proto(eoshift1_8
);
231 eoshift1_8 (gfc_array_char
* const restrict ret
,
232 const gfc_array_char
* const restrict array
,
233 const gfc_array_i8
* const restrict h
,
234 const char * const restrict pbound
,
235 const GFC_INTEGER_8
* const restrict pwhich
)
237 eoshift1 (ret
, array
, h
, pbound
, pwhich
, GFC_DESCRIPTOR_SIZE (array
), 0);
240 void eoshift1_8_char (gfc_array_char
* const restrict
,
242 const gfc_array_char
* const restrict
,
243 const gfc_array_i8
* const restrict
,
244 const char * const restrict
,
245 const GFC_INTEGER_8
* const restrict
,
246 GFC_INTEGER_4
, GFC_INTEGER_4
);
247 export_proto(eoshift1_8_char
);
250 eoshift1_8_char (gfc_array_char
* const restrict ret
,
251 GFC_INTEGER_4 ret_length
__attribute__((unused
)),
252 const gfc_array_char
* const restrict array
,
253 const gfc_array_i8
* const restrict h
,
254 const char * const restrict pbound
,
255 const GFC_INTEGER_8
* const restrict pwhich
,
256 GFC_INTEGER_4 array_length
,
257 GFC_INTEGER_4 bound_length
__attribute__((unused
)))
259 eoshift1 (ret
, array
, h
, pbound
, pwhich
, array_length
, ' ');