1 /* Implementation of the CSHIFT intrinsic
2 Copyright 2003, 2007 Free Software Foundation, Inc.
3 Contributed by Feng Wang <wf_cs@yahoo.com>
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 Ligbfortran 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_16)
40 cshift1 (gfc_array_char * const restrict ret,
41 const gfc_array_char * const restrict array,
42 const gfc_array_i16 * const restrict h,
43 const GFC_INTEGER_16 * const restrict pwhich,
46 /* r.* indicates the return array. */
47 index_type rstride[GFC_MAX_DIMENSIONS];
52 /* s.* indicates the source array. */
53 index_type sstride[GFC_MAX_DIMENSIONS];
58 /* h.* indicates the shift array. */
59 index_type hstride[GFC_MAX_DIMENSIONS];
61 const GFC_INTEGER_16 *hptr;
63 index_type count[GFC_MAX_DIMENSIONS];
64 index_type extent[GFC_MAX_DIMENSIONS];
77 if (which < 0 || (which + 1) > GFC_DESCRIPTOR_RANK (array))
78 runtime_error ("Argument 'DIM' is out of range in call to 'CSHIFT'");
80 arraysize = size0 ((array_t *)array);
82 if (ret->data == NULL)
86 ret->data = internal_malloc_size (size * arraysize);
88 ret->dtype = array->dtype;
89 for (i = 0; i < GFC_DESCRIPTOR_RANK (array); i++)
91 ret->dim[i].lbound = 0;
92 ret->dim[i].ubound = array->dim[i].ubound - array->dim[i].lbound;
95 ret->dim[i].stride = 1;
97 ret->dim[i].stride = (ret->dim[i-1].ubound + 1) * ret->dim[i-1].stride;
108 /* Initialized for avoiding compiler warnings. */
113 for (dim = 0; dim < GFC_DESCRIPTOR_RANK (array); dim++)
117 roffset = ret->dim[dim].stride * size;
120 soffset = array->dim[dim].stride * size;
123 len = array->dim[dim].ubound + 1 - array->dim[dim].lbound;
128 extent[n] = array->dim[dim].ubound + 1 - array->dim[dim].lbound;
129 rstride[n] = ret->dim[dim].stride * size;
130 sstride[n] = array->dim[dim].stride * size;
132 hstride[n] = h->dim[n].stride;
143 dim = GFC_DESCRIPTOR_RANK (array);
144 rstride0 = rstride[0];
145 sstride0 = sstride[0];
146 hstride0 = hstride[0];
153 /* Do the shift for this dimension. */
155 sh = (div (sh, len)).rem;
159 src = &sptr[sh * soffset];
162 for (n = 0; n < len; n++)
164 memcpy (dest, src, size);
166 if (n == len - sh - 1)
172 /* Advance to the next section. */
178 while (count[n] == extent[n])
180 /* When we get to the end of a dimension, reset it and increment
181 the next dimension. */
183 /* We could precalculate these products, but this is a less
184 frequently used path so probably not worth it. */
185 rptr -= rstride[n] * extent[n];
186 sptr -= sstride[n] * extent[n];
187 hptr -= hstride[n] * extent[n];
191 /* Break out of the loop. */
206 void cshift1_16 (gfc_array_char * const restrict,
207 const gfc_array_char * const restrict,
208 const gfc_array_i16 * const restrict,
209 const GFC_INTEGER_16 * const restrict);
210 export_proto(cshift1_16);
213 cshift1_16 (gfc_array_char * const restrict ret,
214 const gfc_array_char * const restrict array,
215 const gfc_array_i16 * const restrict h,
216 const GFC_INTEGER_16 * const restrict pwhich)
218 cshift1 (ret, array, h, pwhich, GFC_DESCRIPTOR_SIZE (array));
222 void cshift1_16_char (gfc_array_char * const restrict ret,
224 const gfc_array_char * const restrict array,
225 const gfc_array_i16 * const restrict h,
226 const GFC_INTEGER_16 * const restrict pwhich,
228 export_proto(cshift1_16_char);
231 cshift1_16_char (gfc_array_char * const restrict ret,
232 GFC_INTEGER_4 ret_length __attribute__((unused)),
233 const gfc_array_char * const restrict array,
234 const gfc_array_i16 * const restrict h,
235 const GFC_INTEGER_16 * const restrict pwhich,
236 GFC_INTEGER_4 array_length)
238 cshift1 (ret, array, h, pwhich, array_length);
242 void cshift1_16_char4 (gfc_array_char * const restrict ret,
244 const gfc_array_char * const restrict array,
245 const gfc_array_i16 * const restrict h,
246 const GFC_INTEGER_16 * const restrict pwhich,
248 export_proto(cshift1_16_char4);
251 cshift1_16_char4 (gfc_array_char * const restrict ret,
252 GFC_INTEGER_4 ret_length __attribute__((unused)),
253 const gfc_array_char * const restrict array,
254 const gfc_array_i16 * const restrict h,
255 const GFC_INTEGER_16 * const restrict pwhich,
256 GFC_INTEGER_4 array_length)
258 cshift1 (ret, array, h, pwhich, array_length * sizeof (gfc_char4_t));