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"
37 #if defined (HAVE_GFC_INTEGER_8)
40 eoshift3 (gfc_array_char * const restrict ret,
41 const gfc_array_char * const restrict array,
42 const gfc_array_i8 * const restrict h,
43 const gfc_array_char * const restrict bound,
44 const GFC_INTEGER_8 * const restrict pwhich,
45 index_type size, const char * filler, index_type filler_len)
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;
63 /* b.* indicates the bound array. */
64 index_type bstride[GFC_MAX_DIMENSIONS];
68 index_type count[GFC_MAX_DIMENSIONS];
69 index_type extent[GFC_MAX_DIMENSIONS];
77 /* The compiler cannot figure out that these are set, initialize
78 them to avoid warnings. */
88 if (ret->data == NULL)
92 ret->data = internal_malloc_size (size * size0 ((array_t *)array));
94 ret->dtype = array->dtype;
95 for (i = 0; i < GFC_DESCRIPTOR_RANK (array); i++)
97 ret->dim[i].lbound = 0;
98 ret->dim[i].ubound = array->dim[i].ubound - array->dim[i].lbound;
101 ret->dim[i].stride = 1;
103 ret->dim[i].stride = (ret->dim[i-1].ubound + 1) * ret->dim[i-1].stride;
108 if (size0 ((array_t *) ret) == 0)
116 for (dim = 0; dim < GFC_DESCRIPTOR_RANK (array); dim++)
120 roffset = ret->dim[dim].stride * size;
123 soffset = array->dim[dim].stride * size;
126 len = array->dim[dim].ubound + 1 - array->dim[dim].lbound;
131 extent[n] = array->dim[dim].ubound + 1 - array->dim[dim].lbound;
132 rstride[n] = ret->dim[dim].stride * size;
133 sstride[n] = array->dim[dim].stride * size;
135 hstride[n] = h->dim[n].stride;
137 bstride[n] = bound->dim[n].stride * size;
149 if (bound && bstride[0] == 0)
152 dim = GFC_DESCRIPTOR_RANK (array);
153 rstride0 = rstride[0];
154 sstride0 = sstride[0];
155 hstride0 = hstride[0];
156 bstride0 = bstride[0];
167 /* Do the shift for this dimension. */
169 if (( sh >= 0 ? sh : -sh ) > len)
175 delta = (sh >= 0) ? sh: -sh;
179 src = &sptr[delta * soffset];
185 dest = &rptr[delta * roffset];
187 for (n = 0; n < len - delta; n++)
189 memcpy (dest, src, size);
200 memcpy (dest, bptr, size);
209 memset (dest, filler[0], size);
211 for (i = 0; i < size; i += filler_len)
212 memcpy (&dest[i], filler, filler_len);
217 /* Advance to the next section. */
224 while (count[n] == extent[n])
226 /* When we get to the end of a dimension, reset it and increment
227 the next dimension. */
229 /* We could precalculate these products, but this is a less
230 frequently used path so probably not worth it. */
231 rptr -= rstride[n] * extent[n];
232 sptr -= sstride[n] * extent[n];
233 hptr -= hstride[n] * extent[n];
234 bptr -= bstride[n] * extent[n];
238 /* Break out of the loop. */
254 extern void eoshift3_8 (gfc_array_char * const restrict,
255 const gfc_array_char * const restrict,
256 const gfc_array_i8 * const restrict,
257 const gfc_array_char * const restrict,
258 const GFC_INTEGER_8 *);
259 export_proto(eoshift3_8);
262 eoshift3_8 (gfc_array_char * const restrict ret,
263 const gfc_array_char * const restrict array,
264 const gfc_array_i8 * const restrict h,
265 const gfc_array_char * const restrict bound,
266 const GFC_INTEGER_8 * const restrict pwhich)
268 eoshift3 (ret, array, h, bound, pwhich, GFC_DESCRIPTOR_SIZE (array),
273 extern void eoshift3_8_char (gfc_array_char * const restrict,
275 const gfc_array_char * const restrict,
276 const gfc_array_i8 * const restrict,
277 const gfc_array_char * const restrict,
278 const GFC_INTEGER_8 * const restrict,
279 GFC_INTEGER_4, GFC_INTEGER_4);
280 export_proto(eoshift3_8_char);
283 eoshift3_8_char (gfc_array_char * const restrict ret,
284 GFC_INTEGER_4 ret_length __attribute__((unused)),
285 const gfc_array_char * const restrict array,
286 const gfc_array_i8 * const restrict h,
287 const gfc_array_char * const restrict bound,
288 const GFC_INTEGER_8 * const restrict pwhich,
289 GFC_INTEGER_4 array_length,
290 GFC_INTEGER_4 bound_length __attribute__((unused)))
292 eoshift3 (ret, array, h, bound, pwhich, array_length, " ", 1);
296 extern void eoshift3_8_char4 (gfc_array_char * const restrict,
298 const gfc_array_char * const restrict,
299 const gfc_array_i8 * const restrict,
300 const gfc_array_char * const restrict,
301 const GFC_INTEGER_8 * const restrict,
302 GFC_INTEGER_4, GFC_INTEGER_4);
303 export_proto(eoshift3_8_char4);
306 eoshift3_8_char4 (gfc_array_char * const restrict ret,
307 GFC_INTEGER_4 ret_length __attribute__((unused)),
308 const gfc_array_char * const restrict array,
309 const gfc_array_i8 * const restrict h,
310 const gfc_array_char * const restrict bound,
311 const GFC_INTEGER_8 * const restrict pwhich,
312 GFC_INTEGER_4 array_length,
313 GFC_INTEGER_4 bound_length __attribute__((unused)))
315 static const gfc_char4_t space = (unsigned char) ' ';
316 eoshift3 (ret, array, h, bound, pwhich, array_length * sizeof (gfc_char4_t),
317 (const char *) &space, sizeof (gfc_char4_t));