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, char filler)
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;
112 for (dim = 0; dim < GFC_DESCRIPTOR_RANK (array); dim++)
116 roffset = ret->dim[dim].stride * size;
119 soffset = array->dim[dim].stride * size;
122 len = array->dim[dim].ubound + 1 - array->dim[dim].lbound;
127 extent[n] = array->dim[dim].ubound + 1 - array->dim[dim].lbound;
128 rstride[n] = ret->dim[dim].stride * size;
129 sstride[n] = array->dim[dim].stride * size;
131 hstride[n] = h->dim[n].stride;
133 bstride[n] = bound->dim[n].stride * size;
145 if (bound && bstride[0] == 0)
148 dim = GFC_DESCRIPTOR_RANK (array);
149 rstride0 = rstride[0];
150 sstride0 = sstride[0];
151 hstride0 = hstride[0];
152 bstride0 = bstride[0];
163 /* Do the shift for this dimension. */
165 if (( sh >= 0 ? sh : -sh ) > len)
171 delta = (sh >= 0) ? sh: -sh;
175 src = &sptr[delta * soffset];
181 dest = &rptr[delta * roffset];
183 for (n = 0; n < len - delta; n++)
185 memcpy (dest, src, size);
196 memcpy (dest, bptr, size);
202 memset (dest, filler, size);
206 /* Advance to the next section. */
213 while (count[n] == extent[n])
215 /* When we get to the end of a dimension, reset it and increment
216 the next dimension. */
218 /* We could precalculate these products, but this is a less
219 frequently used path so probably not worth it. */
220 rptr -= rstride[n] * extent[n];
221 sptr -= sstride[n] * extent[n];
222 hptr -= hstride[n] * extent[n];
223 bptr -= bstride[n] * extent[n];
227 /* Break out of the loop. */
243 extern void eoshift3_'atype_kind` (gfc_array_char * const restrict,
244 const gfc_array_char * const restrict,
245 const 'atype` * const restrict,
246 const gfc_array_char * const restrict,
247 const 'atype_name` *);
248 export_proto(eoshift3_'atype_kind`);
251 eoshift3_'atype_kind` (gfc_array_char * const restrict ret,
252 const gfc_array_char * const restrict array,
253 const 'atype` * const restrict h,
254 const gfc_array_char * const restrict bound,
255 const 'atype_name` * const restrict pwhich)
257 eoshift3 (ret, array, h, bound, pwhich, GFC_DESCRIPTOR_SIZE (array), 0);
260 extern void eoshift3_'atype_kind`_char (gfc_array_char * const restrict,
262 const gfc_array_char * const restrict,
263 const 'atype` * const restrict,
264 const gfc_array_char * const restrict,
265 const 'atype_name` * const restrict,
266 GFC_INTEGER_4, GFC_INTEGER_4);
267 export_proto(eoshift3_'atype_kind`_char);
270 eoshift3_'atype_kind`_char (gfc_array_char * const restrict ret,
271 GFC_INTEGER_4 ret_length __attribute__((unused)),
272 const gfc_array_char * const restrict array,
273 const 'atype` * const restrict h,
274 const gfc_array_char * const restrict bound,
275 const 'atype_name` * const restrict pwhich,
276 GFC_INTEGER_4 array_length,
277 GFC_INTEGER_4 bound_length __attribute__((unused)))
279 eoshift3 (ret, array, h, bound, pwhich, array_length, ''` ''`);