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"'
38 `#if defined (HAVE_'atype_name`)'
41 eoshift3 (gfc_array_char *ret, const gfc_array_char *array, const atype *h,
42 const gfc_array_char *bound, const atype_name *pwhich,
43 index_type size, char filler)
45 /* r.* indicates the return array. */
46 index_type rstride[GFC_MAX_DIMENSIONS];
51 /* s.* indicates the source array. */
52 index_type sstride[GFC_MAX_DIMENSIONS];
57 ` /* h.* indicates the shift array. */'
58 index_type hstride[GFC_MAX_DIMENSIONS];
60 const atype_name *hptr;
61 /* b.* indicates the bound array. */
62 index_type bstride[GFC_MAX_DIMENSIONS];
66 index_type count[GFC_MAX_DIMENSIONS];
67 index_type extent[GFC_MAX_DIMENSIONS];
75 /* The compiler cannot figure out that these are set, initialize
76 them to avoid warnings. */
86 if (ret->data == NULL)
90 ret->data = internal_malloc_size (size * size0 ((array_t *)array));
92 ret->dtype = array->dtype;
93 for (i = 0; i < GFC_DESCRIPTOR_RANK (array); i++)
95 ret->dim[i].lbound = 0;
96 ret->dim[i].ubound = array->dim[i].ubound - array->dim[i].lbound;
99 ret->dim[i].stride = 1;
101 ret->dim[i].stride = (ret->dim[i-1].ubound + 1) * ret->dim[i-1].stride;
109 for (dim = 0; dim < GFC_DESCRIPTOR_RANK (array); dim++)
113 roffset = ret->dim[dim].stride * size;
116 soffset = array->dim[dim].stride * size;
119 len = array->dim[dim].ubound + 1 - array->dim[dim].lbound;
124 extent[n] = array->dim[dim].ubound + 1 - array->dim[dim].lbound;
125 rstride[n] = ret->dim[dim].stride * size;
126 sstride[n] = array->dim[dim].stride * size;
128 hstride[n] = h->dim[n].stride;
130 bstride[n] = bound->dim[n].stride * size;
142 if (bound && bstride[0] == 0)
145 dim = GFC_DESCRIPTOR_RANK (array);
146 rstride0 = rstride[0];
147 sstride0 = sstride[0];
148 hstride0 = hstride[0];
149 bstride0 = bstride[0];
160 ` /* Do the shift for this dimension. */'
162 if (( sh >= 0 ? sh : -sh ) > len)
168 delta = (sh >= 0) ? sh: -sh;
172 src = &sptr[delta * soffset];
178 dest = &rptr[delta * roffset];
180 for (n = 0; n < len - delta; n++)
182 memcpy (dest, src, size);
193 memcpy (dest, bptr, size);
199 memset (dest, filler, size);
203 /* Advance to the next section. */
210 while (count[n] == extent[n])
212 /* When we get to the end of a dimension, reset it and increment
213 the next dimension. */
215 /* We could precalculate these products, but this is a less
216 frequently used path so proabably not worth it. */
217 rptr -= rstride[n] * extent[n];
218 sptr -= sstride[n] * extent[n];
219 hptr -= hstride[n] * extent[n];
220 bptr -= bstride[n] * extent[n];
224 /* Break out of the loop. */
240 extern void eoshift3_`'atype_kind (gfc_array_char *, const gfc_array_char *,
241 const atype *, const gfc_array_char *,
243 export_proto(eoshift3_`'atype_kind);
246 eoshift3_`'atype_kind (gfc_array_char *ret, const gfc_array_char *array,
247 const atype *h, const gfc_array_char *bound,
248 const atype_name *pwhich)
250 eoshift3 (ret, array, h, bound, pwhich, GFC_DESCRIPTOR_SIZE (array), 0);
253 extern void eoshift3_`'atype_kind`'_char (gfc_array_char *, GFC_INTEGER_4,
254 const gfc_array_char *,
256 const gfc_array_char *,
257 const atype_name *, GFC_INTEGER_4,
259 export_proto(eoshift3_`'atype_kind`'_char);
262 eoshift3_`'atype_kind`'_char (gfc_array_char *ret,
263 GFC_INTEGER_4 ret_length __attribute__((unused)),
264 const gfc_array_char *array, const atype *h,
265 const gfc_array_char *bound,
266 const atype_name *pwhich,
267 GFC_INTEGER_4 array_length,
268 GFC_INTEGER_4 bound_length
269 __attribute__((unused)))
271 eoshift3 (ret, array, h, bound, pwhich, array_length, ' ');