1 `/* Implementation of the EOSHIFT intrinsic
2 Copyright 2002, 2005, 2007, 2009 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 3 of the License, or (at your option) any later version.
12 Libgfortran is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 Under Section 7 of GPL version 3, you are granted additional
18 permissions described in the GCC Runtime Library Exception, version
19 3.1, as published by the Free Software Foundation.
21 You should have received a copy of the GNU General Public License and
22 a copy of the GCC Runtime Library Exception along with this program;
23 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
24 <http://www.gnu.org/licenses/>. */
26 #include "libgfortran.h"
33 `#if defined (HAVE_'atype_name`)
36 eoshift1 (gfc_array_char * const restrict ret,
37 const gfc_array_char * const restrict array,
38 const 'atype` * const restrict h,
39 const char * const restrict pbound,
40 const 'atype_name` * const restrict pwhich,
41 const char * filler, index_type filler_len)
43 /* r.* indicates the return array. */
44 index_type rstride[GFC_MAX_DIMENSIONS];
49 /* s.* indicates the source array. */
50 index_type sstride[GFC_MAX_DIMENSIONS];
55 /* h.* indicates the shift array. */
56 index_type hstride[GFC_MAX_DIMENSIONS];
58 const 'atype_name` *hptr;
60 index_type count[GFC_MAX_DIMENSIONS];
61 index_type extent[GFC_MAX_DIMENSIONS];
71 /* The compiler cannot figure out that these are set, initialize
72 them to avoid warnings. */
77 size = GFC_DESCRIPTOR_SIZE(array);
87 arraysize = size0 ((array_t *) array);
88 if (ret->data == NULL)
92 ret->data = internal_malloc_size (size * arraysize);
94 ret->dtype = array->dtype;
95 for (i = 0; i < GFC_DESCRIPTOR_RANK (array); i++)
99 ub = GFC_DESCRIPTOR_EXTENT(array,i) - 1;
104 str = GFC_DESCRIPTOR_EXTENT(ret,i-1)
105 * GFC_DESCRIPTOR_STRIDE(ret,i-1);
107 GFC_DIMENSION_SET(ret->dim[i], 0, ub, str);
111 ret->data = internal_malloc_size (size * arraysize);
113 ret->data = internal_malloc_size (1);
116 else if (unlikely (compile_options.bounds_check))
118 bounds_equal_extents ((array_t *) ret, (array_t *) array,
119 "return value", "EOSHIFT");
122 if (unlikely (compile_options.bounds_check))
124 bounds_reduced_extents ((array_t *) h, (array_t *) array, which,
125 "SHIFT argument", "EOSHIFT");
132 for (dim = 0; dim < GFC_DESCRIPTOR_RANK (array); dim++)
136 roffset = GFC_DESCRIPTOR_STRIDE_BYTES(ret,dim);
139 soffset = GFC_DESCRIPTOR_STRIDE_BYTES(array,dim);
142 len = GFC_DESCRIPTOR_EXTENT(array,dim);
147 extent[n] = GFC_DESCRIPTOR_EXTENT(array,dim);
148 rstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(ret,dim);
149 sstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(array,dim);
151 hstride[n] = GFC_DESCRIPTOR_STRIDE(h,n);
162 dim = GFC_DESCRIPTOR_RANK (array);
163 rstride0 = rstride[0];
164 sstride0 = sstride[0];
165 hstride0 = hstride[0];
172 /* Do the shift for this dimension. */
174 if (( sh >= 0 ? sh : -sh ) > len)
180 delta = (sh >= 0) ? sh: -sh;
184 src = &sptr[delta * soffset];
190 dest = &rptr[delta * roffset];
192 for (n = 0; n < len - delta; n++)
194 memcpy (dest, src, size);
205 memcpy (dest, pbound, size);
214 memset (dest, filler[0], size);
216 for (i = 0; i < size; i += filler_len)
217 memcpy (&dest[i], filler, filler_len);
222 /* Advance to the next section. */
228 while (count[n] == extent[n])
230 /* When we get to the end of a dimension, reset it and increment
231 the next dimension. */
233 /* We could precalculate these products, but this is a less
234 frequently used path so probably not worth it. */
235 rptr -= rstride[n] * extent[n];
236 sptr -= sstride[n] * extent[n];
237 hptr -= hstride[n] * extent[n];
241 /* Break out of the loop. */
256 void eoshift1_'atype_kind` (gfc_array_char * const restrict,
257 const gfc_array_char * const restrict,
258 const 'atype` * const restrict, const char * const restrict,
259 const 'atype_name` * const restrict);
260 export_proto(eoshift1_'atype_kind`);
263 eoshift1_'atype_kind` (gfc_array_char * const restrict ret,
264 const gfc_array_char * const restrict array,
265 const 'atype` * const restrict h,
266 const char * const restrict pbound,
267 const 'atype_name` * const restrict pwhich)
269 eoshift1 (ret, array, h, pbound, pwhich, "\0", 1);
273 void eoshift1_'atype_kind`_char (gfc_array_char * const restrict,
275 const gfc_array_char * const restrict,
276 const 'atype` * const restrict,
277 const char * const restrict,
278 const 'atype_name` * const restrict,
279 GFC_INTEGER_4, GFC_INTEGER_4);
280 export_proto(eoshift1_'atype_kind`_char);
283 eoshift1_'atype_kind`_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 'atype` * const restrict h,
287 const char * const restrict pbound,
288 const 'atype_name` * const restrict pwhich,
289 GFC_INTEGER_4 array_length __attribute__((unused)),
290 GFC_INTEGER_4 bound_length __attribute__((unused)))
292 eoshift1 (ret, array, h, pbound, pwhich, " ", 1);
296 void eoshift1_'atype_kind`_char4 (gfc_array_char * const restrict,
298 const gfc_array_char * const restrict,
299 const 'atype` * const restrict,
300 const char * const restrict,
301 const 'atype_name` * const restrict,
302 GFC_INTEGER_4, GFC_INTEGER_4);
303 export_proto(eoshift1_'atype_kind`_char4);
306 eoshift1_'atype_kind`_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 'atype` * const restrict h,
310 const char * const restrict pbound,
311 const 'atype_name` * const restrict pwhich,
312 GFC_INTEGER_4 array_length __attribute__((unused)),
313 GFC_INTEGER_4 bound_length __attribute__((unused)))
315 static const gfc_char4_t space = (unsigned char) ''` ''`;
316 eoshift1 (ret, array, h, pbound, pwhich,
317 (const char *) &space, sizeof (gfc_char4_t));