1 /* Implementation of the EOSHIFT intrinsic
2 Copyright 2002, 2005, 2007, 2009 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 3 of the License, or (at your option) any later version.
12 Libgfortran is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 Under Section 7 of GPL version 3, you are granted additional
18 permissions described in the GCC Runtime Library Exception, version
19 3.1, as published by the Free Software Foundation.
21 You should have received a copy of the GNU General Public License and
22 a copy of the GCC Runtime Library Exception along with this program;
23 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
24 <http://www.gnu.org/licenses/>. */
26 #include "libgfortran.h"
32 #if defined (HAVE_GFC_INTEGER_16)
35 eoshift1 (gfc_array_char
* const restrict ret
,
36 const gfc_array_char
* const restrict array
,
37 const gfc_array_i16
* const restrict h
,
38 const char * const restrict pbound
,
39 const GFC_INTEGER_16
* const restrict pwhich
,
40 const char * filler
, index_type filler_len
)
42 /* r.* indicates the return array. */
43 index_type rstride
[GFC_MAX_DIMENSIONS
];
48 /* s.* indicates the source array. */
49 index_type sstride
[GFC_MAX_DIMENSIONS
];
54 /* h.* indicates the shift array. */
55 index_type hstride
[GFC_MAX_DIMENSIONS
];
57 const GFC_INTEGER_16
*hptr
;
59 index_type count
[GFC_MAX_DIMENSIONS
];
60 index_type extent
[GFC_MAX_DIMENSIONS
];
70 /* The compiler cannot figure out that these are set, initialize
71 them to avoid warnings. */
76 size
= GFC_DESCRIPTOR_SIZE(array
);
86 arraysize
= size0 ((array_t
*) array
);
87 if (ret
->data
== NULL
)
91 ret
->data
= internal_malloc_size (size
* arraysize
);
93 ret
->dtype
= array
->dtype
;
94 for (i
= 0; i
< GFC_DESCRIPTOR_RANK (array
); i
++)
98 ub
= GFC_DESCRIPTOR_EXTENT(array
,i
) - 1;
103 str
= GFC_DESCRIPTOR_EXTENT(ret
,i
-1)
104 * GFC_DESCRIPTOR_STRIDE(ret
,i
-1);
106 GFC_DIMENSION_SET(ret
->dim
[i
], 0, ub
, str
);
110 ret
->data
= internal_malloc_size (size
* arraysize
);
112 ret
->data
= internal_malloc_size (1);
115 else if (unlikely (compile_options
.bounds_check
))
117 bounds_equal_extents ((array_t
*) ret
, (array_t
*) array
,
118 "return value", "EOSHIFT");
121 if (unlikely (compile_options
.bounds_check
))
123 bounds_reduced_extents ((array_t
*) h
, (array_t
*) array
, which
,
124 "SHIFT argument", "EOSHIFT");
131 for (dim
= 0; dim
< GFC_DESCRIPTOR_RANK (array
); dim
++)
135 roffset
= GFC_DESCRIPTOR_STRIDE_BYTES(ret
,dim
);
138 soffset
= GFC_DESCRIPTOR_STRIDE_BYTES(array
,dim
);
141 len
= GFC_DESCRIPTOR_EXTENT(array
,dim
);
146 extent
[n
] = GFC_DESCRIPTOR_EXTENT(array
,dim
);
147 rstride
[n
] = GFC_DESCRIPTOR_STRIDE_BYTES(ret
,dim
);
148 sstride
[n
] = GFC_DESCRIPTOR_STRIDE_BYTES(array
,dim
);
150 hstride
[n
] = GFC_DESCRIPTOR_STRIDE(h
,n
);
161 dim
= GFC_DESCRIPTOR_RANK (array
);
162 rstride0
= rstride
[0];
163 sstride0
= sstride
[0];
164 hstride0
= hstride
[0];
171 /* Do the shift for this dimension. */
173 if (( sh
>= 0 ? sh
: -sh
) > len
)
179 delta
= (sh
>= 0) ? sh
: -sh
;
183 src
= &sptr
[delta
* soffset
];
189 dest
= &rptr
[delta
* roffset
];
191 for (n
= 0; n
< len
- delta
; n
++)
193 memcpy (dest
, src
, size
);
204 memcpy (dest
, pbound
, size
);
213 memset (dest
, filler
[0], size
);
215 for (i
= 0; i
< size
; i
+= filler_len
)
216 memcpy (&dest
[i
], filler
, filler_len
);
221 /* Advance to the next section. */
227 while (count
[n
] == extent
[n
])
229 /* When we get to the end of a dimension, reset it and increment
230 the next dimension. */
232 /* We could precalculate these products, but this is a less
233 frequently used path so probably not worth it. */
234 rptr
-= rstride
[n
] * extent
[n
];
235 sptr
-= sstride
[n
] * extent
[n
];
236 hptr
-= hstride
[n
] * extent
[n
];
240 /* Break out of the loop. */
255 void eoshift1_16 (gfc_array_char
* const restrict
,
256 const gfc_array_char
* const restrict
,
257 const gfc_array_i16
* const restrict
, const char * const restrict
,
258 const GFC_INTEGER_16
* const restrict
);
259 export_proto(eoshift1_16
);
262 eoshift1_16 (gfc_array_char
* const restrict ret
,
263 const gfc_array_char
* const restrict array
,
264 const gfc_array_i16
* const restrict h
,
265 const char * const restrict pbound
,
266 const GFC_INTEGER_16
* const restrict pwhich
)
268 eoshift1 (ret
, array
, h
, pbound
, pwhich
, "\0", 1);
272 void eoshift1_16_char (gfc_array_char
* const restrict
,
274 const gfc_array_char
* const restrict
,
275 const gfc_array_i16
* const restrict
,
276 const char * const restrict
,
277 const GFC_INTEGER_16
* const restrict
,
278 GFC_INTEGER_4
, GFC_INTEGER_4
);
279 export_proto(eoshift1_16_char
);
282 eoshift1_16_char (gfc_array_char
* const restrict ret
,
283 GFC_INTEGER_4 ret_length
__attribute__((unused
)),
284 const gfc_array_char
* const restrict array
,
285 const gfc_array_i16
* const restrict h
,
286 const char * const restrict pbound
,
287 const GFC_INTEGER_16
* const restrict pwhich
,
288 GFC_INTEGER_4 array_length
__attribute__((unused
)),
289 GFC_INTEGER_4 bound_length
__attribute__((unused
)))
291 eoshift1 (ret
, array
, h
, pbound
, pwhich
, " ", 1);
295 void eoshift1_16_char4 (gfc_array_char
* const restrict
,
297 const gfc_array_char
* const restrict
,
298 const gfc_array_i16
* const restrict
,
299 const char * const restrict
,
300 const GFC_INTEGER_16
* const restrict
,
301 GFC_INTEGER_4
, GFC_INTEGER_4
);
302 export_proto(eoshift1_16_char4
);
305 eoshift1_16_char4 (gfc_array_char
* const restrict ret
,
306 GFC_INTEGER_4 ret_length
__attribute__((unused
)),
307 const gfc_array_char
* const restrict array
,
308 const gfc_array_i16
* const restrict h
,
309 const char * const restrict pbound
,
310 const GFC_INTEGER_16
* const restrict pwhich
,
311 GFC_INTEGER_4 array_length
__attribute__((unused
)),
312 GFC_INTEGER_4 bound_length
__attribute__((unused
)))
314 static const gfc_char4_t space
= (unsigned char) ' ';
315 eoshift1 (ret
, array
, h
, pbound
, pwhich
,
316 (const char *) &space
, sizeof (gfc_char4_t
));