1 `/* Implementation of the EOSHIFT intrinsic
2 Copyright 2002, 2005, 2007 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. */
31 #include "libgfortran.h"
38 `#if defined (HAVE_'atype_name`)
41 eoshift3 (gfc_array_char * const restrict ret,
42 const gfc_array_char * const restrict array,
43 const 'atype` * const restrict h,
44 const gfc_array_char * const restrict bound,
45 const 'atype_name` * const restrict pwhich,
46 index_type size, const char * filler, index_type filler_len)
48 /* r.* indicates the return array. */
49 index_type rstride[GFC_MAX_DIMENSIONS];
54 /* s.* indicates the source array. */
55 index_type sstride[GFC_MAX_DIMENSIONS];
60 /* h.* indicates the shift array. */
61 index_type hstride[GFC_MAX_DIMENSIONS];
63 const 'atype_name` *hptr;
64 /* b.* indicates the bound array. */
65 index_type bstride[GFC_MAX_DIMENSIONS];
69 index_type count[GFC_MAX_DIMENSIONS];
70 index_type extent[GFC_MAX_DIMENSIONS];
78 /* The compiler cannot figure out that these are set, initialize
79 them to avoid warnings. */
89 if (ret->data == NULL)
93 ret->data = internal_malloc_size (size * size0 ((array_t *)array));
95 ret->dtype = array->dtype;
96 for (i = 0; i < GFC_DESCRIPTOR_RANK (array); i++)
98 ret->dim[i].lbound = 0;
99 ret->dim[i].ubound = array->dim[i].ubound - array->dim[i].lbound;
102 ret->dim[i].stride = 1;
104 ret->dim[i].stride = (ret->dim[i-1].ubound + 1) * ret->dim[i-1].stride;
109 if (size0 ((array_t *) ret) == 0)
117 for (dim = 0; dim < GFC_DESCRIPTOR_RANK (array); dim++)
121 roffset = ret->dim[dim].stride * size;
124 soffset = array->dim[dim].stride * size;
127 len = array->dim[dim].ubound + 1 - array->dim[dim].lbound;
132 extent[n] = array->dim[dim].ubound + 1 - array->dim[dim].lbound;
133 rstride[n] = ret->dim[dim].stride * size;
134 sstride[n] = array->dim[dim].stride * size;
136 hstride[n] = h->dim[n].stride;
138 bstride[n] = bound->dim[n].stride * size;
150 if (bound && bstride[0] == 0)
153 dim = GFC_DESCRIPTOR_RANK (array);
154 rstride0 = rstride[0];
155 sstride0 = sstride[0];
156 hstride0 = hstride[0];
157 bstride0 = bstride[0];
168 /* Do the shift for this dimension. */
170 if (( sh >= 0 ? sh : -sh ) > len)
176 delta = (sh >= 0) ? sh: -sh;
180 src = &sptr[delta * soffset];
186 dest = &rptr[delta * roffset];
188 for (n = 0; n < len - delta; n++)
190 memcpy (dest, src, size);
201 memcpy (dest, bptr, size);
210 memset (dest, filler[0], size);
212 for (i = 0; i < size; i += filler_len)
213 memcpy (&dest[i], filler, filler_len);
218 /* Advance to the next section. */
225 while (count[n] == extent[n])
227 /* When we get to the end of a dimension, reset it and increment
228 the next dimension. */
230 /* We could precalculate these products, but this is a less
231 frequently used path so probably not worth it. */
232 rptr -= rstride[n] * extent[n];
233 sptr -= sstride[n] * extent[n];
234 hptr -= hstride[n] * extent[n];
235 bptr -= bstride[n] * extent[n];
239 /* Break out of the loop. */
255 extern void eoshift3_'atype_kind` (gfc_array_char * const restrict,
256 const gfc_array_char * const restrict,
257 const 'atype` * const restrict,
258 const gfc_array_char * const restrict,
259 const 'atype_name` *);
260 export_proto(eoshift3_'atype_kind`);
263 eoshift3_'atype_kind` (gfc_array_char * const restrict ret,
264 const gfc_array_char * const restrict array,
265 const 'atype` * const restrict h,
266 const gfc_array_char * const restrict bound,
267 const 'atype_name` * const restrict pwhich)
269 eoshift3 (ret, array, h, bound, pwhich, GFC_DESCRIPTOR_SIZE (array),
274 extern void eoshift3_'atype_kind`_char (gfc_array_char * const restrict,
276 const gfc_array_char * const restrict,
277 const 'atype` * const restrict,
278 const gfc_array_char * const restrict,
279 const 'atype_name` * const restrict,
280 GFC_INTEGER_4, GFC_INTEGER_4);
281 export_proto(eoshift3_'atype_kind`_char);
284 eoshift3_'atype_kind`_char (gfc_array_char * const restrict ret,
285 GFC_INTEGER_4 ret_length __attribute__((unused)),
286 const gfc_array_char * const restrict array,
287 const 'atype` * const restrict h,
288 const gfc_array_char * const restrict bound,
289 const 'atype_name` * const restrict pwhich,
290 GFC_INTEGER_4 array_length,
291 GFC_INTEGER_4 bound_length __attribute__((unused)))
293 eoshift3 (ret, array, h, bound, pwhich, array_length, " ", 1);
297 extern void eoshift3_'atype_kind`_char4 (gfc_array_char * const restrict,
299 const gfc_array_char * const restrict,
300 const 'atype` * const restrict,
301 const gfc_array_char * const restrict,
302 const 'atype_name` * const restrict,
303 GFC_INTEGER_4, GFC_INTEGER_4);
304 export_proto(eoshift3_'atype_kind`_char4);
307 eoshift3_'atype_kind`_char4 (gfc_array_char * const restrict ret,
308 GFC_INTEGER_4 ret_length __attribute__((unused)),
309 const gfc_array_char * const restrict array,
310 const 'atype` * const restrict h,
311 const gfc_array_char * const restrict bound,
312 const 'atype_name` * const restrict pwhich,
313 GFC_INTEGER_4 array_length,
314 GFC_INTEGER_4 bound_length __attribute__((unused)))
316 static const gfc_char4_t space = (unsigned char) ''` ''`;
317 eoshift3 (ret, array, h, bound, pwhich, array_length * sizeof (gfc_char4_t),
318 (const char *) &space, sizeof (gfc_char4_t));