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"
37 #if defined (HAVE_GFC_INTEGER_16)
40 eoshift1 (gfc_array_char *ret, const gfc_array_char *array, const gfc_array_i16 *h,
41 const char *pbound, const GFC_INTEGER_16 *pwhich, index_type size,
44 /* r.* indicates the return array. */
45 index_type rstride[GFC_MAX_DIMENSIONS];
50 /* s.* indicates the source array. */
51 index_type sstride[GFC_MAX_DIMENSIONS];
56 /* h.* indicates the shift array. */
57 index_type hstride[GFC_MAX_DIMENSIONS];
59 const GFC_INTEGER_16 *hptr;
61 index_type count[GFC_MAX_DIMENSIONS];
62 index_type extent[GFC_MAX_DIMENSIONS];
70 /* The compiler cannot figure out that these are set, initialize
71 them to avoid warnings. */
84 if (ret->data == NULL)
88 ret->data = internal_malloc_size (size * size0 ((array_t *)array));
90 ret->dtype = array->dtype;
91 for (i = 0; i < GFC_DESCRIPTOR_RANK (array); i++)
93 ret->dim[i].lbound = 0;
94 ret->dim[i].ubound = array->dim[i].ubound - array->dim[i].lbound;
97 ret->dim[i].stride = 1;
99 ret->dim[i].stride = (ret->dim[i-1].ubound + 1) * ret->dim[i-1].stride;
104 for (dim = 0; dim < GFC_DESCRIPTOR_RANK (array); dim++)
108 roffset = ret->dim[dim].stride * size;
111 soffset = array->dim[dim].stride * size;
114 len = array->dim[dim].ubound + 1 - array->dim[dim].lbound;
119 extent[n] = array->dim[dim].ubound + 1 - array->dim[dim].lbound;
120 rstride[n] = ret->dim[dim].stride * size;
121 sstride[n] = array->dim[dim].stride * size;
123 hstride[n] = h->dim[n].stride;
134 dim = GFC_DESCRIPTOR_RANK (array);
135 rstride0 = rstride[0];
136 sstride0 = sstride[0];
137 hstride0 = hstride[0];
144 /* Do the shift for this dimension. */
146 if (( sh >= 0 ? sh : -sh ) > len)
152 delta = (sh >= 0) ? sh: -sh;
156 src = &sptr[delta * soffset];
162 dest = &rptr[delta * roffset];
164 for (n = 0; n < len - delta; n++)
166 memcpy (dest, src, size);
177 memcpy (dest, pbound, size);
183 memset (dest, filler, size);
187 /* Advance to the next section. */
193 while (count[n] == extent[n])
195 /* When we get to the end of a dimension, reset it and increment
196 the next dimension. */
198 /* We could precalculate these products, but this is a less
199 frequently used path so proabably not worth it. */
200 rptr -= rstride[n] * extent[n];
201 sptr -= sstride[n] * extent[n];
202 hptr -= hstride[n] * extent[n];
206 /* Break out of the loop. */
221 void eoshift1_16 (gfc_array_char *, const gfc_array_char *,
222 const gfc_array_i16 *, const char *, const GFC_INTEGER_16 *);
223 export_proto(eoshift1_16);
226 eoshift1_16 (gfc_array_char *ret, const gfc_array_char *array,
227 const gfc_array_i16 *h, const char *pbound,
228 const GFC_INTEGER_16 *pwhich)
230 eoshift1 (ret, array, h, pbound, pwhich, GFC_DESCRIPTOR_SIZE (array), 0);
233 void eoshift1_16_char (gfc_array_char *, GFC_INTEGER_4,
234 const gfc_array_char *, const gfc_array_i16 *,
235 const char *, const GFC_INTEGER_16 *,
236 GFC_INTEGER_4, GFC_INTEGER_4);
237 export_proto(eoshift1_16_char);
240 eoshift1_16_char (gfc_array_char *ret,
241 GFC_INTEGER_4 ret_length __attribute__((unused)),
242 const gfc_array_char *array, const gfc_array_i16 *h,
243 const char *pbound, const GFC_INTEGER_16 *pwhich,
244 GFC_INTEGER_4 array_length,
245 GFC_INTEGER_4 bound_length
246 __attribute__((unused)))
248 eoshift1 (ret, array, h, pbound, pwhich, array_length, ' ');