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)
93 ret->dtype = array->dtype;
94 for (i = 0; i < GFC_DESCRIPTOR_RANK (array); i++)
98 ub = GFC_DESCRIPTOR_EXTENT(array,i) - 1;
103 str = GFC_DESCRIPTOR_EXTENT(ret,i-1)
104 * GFC_DESCRIPTOR_STRIDE(ret,i-1);
106 GFC_DIMENSION_SET(ret->dim[i], 0, ub, str);
109 /* internal_malloc_size allocates a single byte for zero size. */
110 ret->data = internal_malloc_size (size * arraysize);
113 else if (unlikely (compile_options.bounds_check))
115 bounds_equal_extents ((array_t *) ret, (array_t *) array,
116 "return value", "EOSHIFT");
119 if (unlikely (compile_options.bounds_check))
121 bounds_reduced_extents ((array_t *) h, (array_t *) array, which,
122 "SHIFT argument", "EOSHIFT");
129 for (dim = 0; dim < GFC_DESCRIPTOR_RANK (array); dim++)
133 roffset = GFC_DESCRIPTOR_STRIDE_BYTES(ret,dim);
136 soffset = GFC_DESCRIPTOR_STRIDE_BYTES(array,dim);
139 len = GFC_DESCRIPTOR_EXTENT(array,dim);
144 extent[n] = GFC_DESCRIPTOR_EXTENT(array,dim);
145 rstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(ret,dim);
146 sstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(array,dim);
148 hstride[n] = GFC_DESCRIPTOR_STRIDE(h,n);
159 dim = GFC_DESCRIPTOR_RANK (array);
160 rstride0 = rstride[0];
161 sstride0 = sstride[0];
162 hstride0 = hstride[0];
169 /* Do the shift for this dimension. */
171 if (( sh >= 0 ? sh : -sh ) > len)
177 delta = (sh >= 0) ? sh: -sh;
181 src = &sptr[delta * soffset];
187 dest = &rptr[delta * roffset];
189 for (n = 0; n < len - delta; n++)
191 memcpy (dest, src, size);
202 memcpy (dest, pbound, size);
211 memset (dest, filler[0], size);
213 for (i = 0; i < size; i += filler_len)
214 memcpy (&dest[i], filler, filler_len);
219 /* Advance to the next section. */
225 while (count[n] == extent[n])
227 /* When we get to the end of a dimension, reset it and increment
228 the next dimension. */
230 /* We could precalculate these products, but this is a less
231 frequently used path so probably not worth it. */
232 rptr -= rstride[n] * extent[n];
233 sptr -= sstride[n] * extent[n];
234 hptr -= hstride[n] * extent[n];
238 /* Break out of the loop. */
253 void eoshift1_'atype_kind` (gfc_array_char * const restrict,
254 const gfc_array_char * const restrict,
255 const 'atype` * const restrict, const char * const restrict,
256 const 'atype_name` * const restrict);
257 export_proto(eoshift1_'atype_kind`);
260 eoshift1_'atype_kind` (gfc_array_char * const restrict ret,
261 const gfc_array_char * const restrict array,
262 const 'atype` * const restrict h,
263 const char * const restrict pbound,
264 const 'atype_name` * const restrict pwhich)
266 eoshift1 (ret, array, h, pbound, pwhich, "\0", 1);
270 void eoshift1_'atype_kind`_char (gfc_array_char * const restrict,
272 const gfc_array_char * const restrict,
273 const 'atype` * const restrict,
274 const char * const restrict,
275 const 'atype_name` * const restrict,
276 GFC_INTEGER_4, GFC_INTEGER_4);
277 export_proto(eoshift1_'atype_kind`_char);
280 eoshift1_'atype_kind`_char (gfc_array_char * const restrict ret,
281 GFC_INTEGER_4 ret_length __attribute__((unused)),
282 const gfc_array_char * const restrict array,
283 const 'atype` * const restrict h,
284 const char * const restrict pbound,
285 const 'atype_name` * const restrict pwhich,
286 GFC_INTEGER_4 array_length __attribute__((unused)),
287 GFC_INTEGER_4 bound_length __attribute__((unused)))
289 eoshift1 (ret, array, h, pbound, pwhich, " ", 1);
293 void eoshift1_'atype_kind`_char4 (gfc_array_char * const restrict,
295 const gfc_array_char * const restrict,
296 const 'atype` * const restrict,
297 const char * const restrict,
298 const 'atype_name` * const restrict,
299 GFC_INTEGER_4, GFC_INTEGER_4);
300 export_proto(eoshift1_'atype_kind`_char4);
303 eoshift1_'atype_kind`_char4 (gfc_array_char * const restrict ret,
304 GFC_INTEGER_4 ret_length __attribute__((unused)),
305 const gfc_array_char * const restrict array,
306 const 'atype` * const restrict h,
307 const char * const restrict pbound,
308 const 'atype_name` * const restrict pwhich,
309 GFC_INTEGER_4 array_length __attribute__((unused)),
310 GFC_INTEGER_4 bound_length __attribute__((unused)))
312 static const gfc_char4_t space = (unsigned char) ''` ''`;
313 eoshift1 (ret, array, h, pbound, pwhich,
314 (const char *) &space, sizeof (gfc_char4_t));