1 `/* Implementation of the EOSHIFT intrinsic
2 Copyright (C) 2002-2017 Free Software Foundation, Inc.
3 Contributed by Paul Brook <paul@nowt.org>
5 This file is part of the GNU Fortran 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"
31 `#if defined (HAVE_'atype_name`)
34 eoshift3 (gfc_array_char * const restrict ret,
35 const gfc_array_char * const restrict array,
36 const 'atype` * const restrict h,
37 const gfc_array_char * const restrict bound,
38 const 'atype_name` * const restrict pwhich,
39 const char * filler, index_type filler_len)
41 /* r.* indicates the return array. */
42 index_type rstride[GFC_MAX_DIMENSIONS];
47 /* s.* indicates the source array. */
48 index_type sstride[GFC_MAX_DIMENSIONS];
53 /* h.* indicates the shift array. */
54 index_type hstride[GFC_MAX_DIMENSIONS];
56 const 'atype_name` *hptr;
57 /* b.* indicates the bound array. */
58 index_type bstride[GFC_MAX_DIMENSIONS];
62 index_type count[GFC_MAX_DIMENSIONS];
63 index_type extent[GFC_MAX_DIMENSIONS];
73 /* The compiler cannot figure out that these are set, initialize
74 them to avoid warnings. */
79 arraysize = size0 ((array_t *) array);
80 size = GFC_DESCRIPTOR_SIZE(array);
87 if (ret->base_addr == NULL)
91 ret->base_addr = xmallocarray (arraysize, size);
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 /* xmallocarray allocates a single byte for zero size. */
110 ret->base_addr = xmallocarray (arraysize, size);
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");
131 for (dim = 0; dim < GFC_DESCRIPTOR_RANK (array); dim++)
135 roffset = GFC_DESCRIPTOR_STRIDE_BYTES(ret,dim);
138 soffset = GFC_DESCRIPTOR_STRIDE_BYTES(array,dim);
141 len = GFC_DESCRIPTOR_EXTENT(array,dim);
146 extent[n] = GFC_DESCRIPTOR_EXTENT(array,dim);
147 rstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(ret,dim);
148 sstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(array,dim);
150 hstride[n] = GFC_DESCRIPTOR_STRIDE(h,n);
152 bstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(bound,n);
164 if (bound && bstride[0] == 0)
167 dim = GFC_DESCRIPTOR_RANK (array);
168 rstride0 = rstride[0];
169 sstride0 = sstride[0];
170 hstride0 = hstride[0];
171 bstride0 = bstride[0];
172 rptr = ret->base_addr;
173 sptr = array->base_addr;
176 bptr = bound->base_addr;
182 /* Do the shift for this dimension. */
184 if (( sh >= 0 ? sh : -sh ) > len)
190 delta = (sh >= 0) ? sh: -sh;
194 src = &sptr[delta * soffset];
200 dest = &rptr[delta * roffset];
202 for (n = 0; n < len - delta; n++)
204 memcpy (dest, src, size);
215 memcpy (dest, bptr, size);
224 memset (dest, filler[0], size);
226 for (i = 0; i < size; i += filler_len)
227 memcpy (&dest[i], filler, filler_len);
232 /* Advance to the next section. */
239 while (count[n] == extent[n])
241 /* When we get to the end of a dimension, reset it and increment
242 the next dimension. */
244 /* We could precalculate these products, but this is a less
245 frequently used path so probably not worth it. */
246 rptr -= rstride[n] * extent[n];
247 sptr -= sstride[n] * extent[n];
248 hptr -= hstride[n] * extent[n];
249 bptr -= bstride[n] * extent[n];
253 /* Break out of the loop. */
269 extern void eoshift3_'atype_kind` (gfc_array_char * const restrict,
270 const gfc_array_char * const restrict,
271 const 'atype` * const restrict,
272 const gfc_array_char * const restrict,
273 const 'atype_name` *);
274 export_proto(eoshift3_'atype_kind`);
277 eoshift3_'atype_kind` (gfc_array_char * const restrict ret,
278 const gfc_array_char * const restrict array,
279 const 'atype` * const restrict h,
280 const gfc_array_char * const restrict bound,
281 const 'atype_name` * const restrict pwhich)
283 eoshift3 (ret, array, h, bound, pwhich, "\0", 1);
287 extern void eoshift3_'atype_kind`_char (gfc_array_char * const restrict,
289 const gfc_array_char * const restrict,
290 const 'atype` * const restrict,
291 const gfc_array_char * const restrict,
292 const 'atype_name` * const restrict,
293 GFC_INTEGER_4, GFC_INTEGER_4);
294 export_proto(eoshift3_'atype_kind`_char);
297 eoshift3_'atype_kind`_char (gfc_array_char * const restrict ret,
298 GFC_INTEGER_4 ret_length __attribute__((unused)),
299 const gfc_array_char * const restrict array,
300 const 'atype` * const restrict h,
301 const gfc_array_char * const restrict bound,
302 const 'atype_name` * const restrict pwhich,
303 GFC_INTEGER_4 array_length __attribute__((unused)),
304 GFC_INTEGER_4 bound_length __attribute__((unused)))
306 eoshift3 (ret, array, h, bound, pwhich, " ", 1);
310 extern void eoshift3_'atype_kind`_char4 (gfc_array_char * const restrict,
312 const gfc_array_char * const restrict,
313 const 'atype` * const restrict,
314 const gfc_array_char * const restrict,
315 const 'atype_name` * const restrict,
316 GFC_INTEGER_4, GFC_INTEGER_4);
317 export_proto(eoshift3_'atype_kind`_char4);
320 eoshift3_'atype_kind`_char4 (gfc_array_char * const restrict ret,
321 GFC_INTEGER_4 ret_length __attribute__((unused)),
322 const gfc_array_char * const restrict array,
323 const 'atype` * const restrict h,
324 const gfc_array_char * const restrict bound,
325 const 'atype_name` * const restrict pwhich,
326 GFC_INTEGER_4 array_length __attribute__((unused)),
327 GFC_INTEGER_4 bound_length __attribute__((unused)))
329 static const gfc_char4_t space = (unsigned char) ''` ''`;
330 eoshift3 (ret, array, h, bound, pwhich,
331 (const char *) &space, sizeof (gfc_char4_t));