1 `/* Implementation of the EOSHIFT intrinsic
2 Copyright (C) 2002-2018 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 eoshift1 (gfc_array_char * const restrict ret,
35 const gfc_array_char * const restrict array,
36 const 'atype` * const restrict h,
37 const char * const restrict pbound,
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;
58 index_type count[GFC_MAX_DIMENSIONS];
59 index_type extent[GFC_MAX_DIMENSIONS];
69 /* The compiler cannot figure out that these are set, initialize
70 them to avoid warnings. */
75 size = GFC_DESCRIPTOR_SIZE(array);
85 arraysize = size0 ((array_t *) array);
86 if (ret->base_addr == NULL)
89 GFC_DTYPE_COPY(ret,array);
90 for (index_type i = 0; i < GFC_DESCRIPTOR_RANK (array); i++)
94 ub = GFC_DESCRIPTOR_EXTENT(array,i) - 1;
99 str = GFC_DESCRIPTOR_EXTENT(ret,i-1)
100 * GFC_DESCRIPTOR_STRIDE(ret,i-1);
102 GFC_DIMENSION_SET(ret->dim[i], 0, ub, str);
105 /* xmallocarray allocates a single byte for zero size. */
106 ret->base_addr = xmallocarray (arraysize, size);
109 else if (unlikely (compile_options.bounds_check))
111 bounds_equal_extents ((array_t *) ret, (array_t *) array,
112 "return value", "EOSHIFT");
115 if (unlikely (compile_options.bounds_check))
117 bounds_reduced_extents ((array_t *) h, (array_t *) array, which,
118 "SHIFT argument", "EOSHIFT");
125 for (dim = 0; dim < GFC_DESCRIPTOR_RANK (array); dim++)
129 roffset = GFC_DESCRIPTOR_STRIDE_BYTES(ret,dim);
132 soffset = GFC_DESCRIPTOR_STRIDE_BYTES(array,dim);
135 len = GFC_DESCRIPTOR_EXTENT(array,dim);
140 extent[n] = GFC_DESCRIPTOR_EXTENT(array,dim);
141 rstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(ret,dim);
142 sstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(array,dim);
144 hstride[n] = GFC_DESCRIPTOR_STRIDE(h,n);
155 dim = GFC_DESCRIPTOR_RANK (array);
156 rstride0 = rstride[0];
157 sstride0 = sstride[0];
158 hstride0 = hstride[0];
159 rptr = ret->base_addr;
160 sptr = array->base_addr;
165 /* Do the shift for this dimension. */
167 if (( sh >= 0 ? sh : -sh ) > len)
173 delta = (sh >= 0) ? sh: -sh;
177 src = &sptr[delta * soffset];
183 dest = &rptr[delta * roffset];
186 /* If the elements are contiguous, perform a single block move. */
187 if (soffset == size && roffset == size)
189 size_t chunk = size * (len - delta);
190 memcpy (dest, src, chunk);
195 for (n = 0; n < len - delta; n++)
197 memcpy (dest, src, size);
209 memcpy (dest, pbound, size);
218 memset (dest, filler[0], size);
220 for (i = 0; i < size; i += filler_len)
221 memcpy (&dest[i], filler, filler_len);
226 /* Advance to the next section. */
232 while (count[n] == extent[n])
234 /* When we get to the end of a dimension, reset it and increment
235 the next dimension. */
237 /* We could precalculate these products, but this is a less
238 frequently used path so probably not worth it. */
239 rptr -= rstride[n] * extent[n];
240 sptr -= sstride[n] * extent[n];
241 hptr -= hstride[n] * extent[n];
245 /* Break out of the loop. */
260 void eoshift1_'atype_kind` (gfc_array_char * const restrict,
261 const gfc_array_char * const restrict,
262 const 'atype` * const restrict, const char * const restrict,
263 const 'atype_name` * const restrict);
264 export_proto(eoshift1_'atype_kind`);
267 eoshift1_'atype_kind` (gfc_array_char * const restrict ret,
268 const gfc_array_char * const restrict array,
269 const 'atype` * const restrict h,
270 const char * const restrict pbound,
271 const 'atype_name` * const restrict pwhich)
273 eoshift1 (ret, array, h, pbound, pwhich, "\0", 1);
277 void eoshift1_'atype_kind`_char (gfc_array_char * const restrict,
279 const gfc_array_char * const restrict,
280 const 'atype` * const restrict,
281 const char * const restrict,
282 const 'atype_name` * const restrict,
283 GFC_INTEGER_4, GFC_INTEGER_4);
284 export_proto(eoshift1_'atype_kind`_char);
287 eoshift1_'atype_kind`_char (gfc_array_char * const restrict ret,
288 GFC_INTEGER_4 ret_length __attribute__((unused)),
289 const gfc_array_char * const restrict array,
290 const 'atype` * const restrict h,
291 const char * const restrict pbound,
292 const 'atype_name` * const restrict pwhich,
293 GFC_INTEGER_4 array_length __attribute__((unused)),
294 GFC_INTEGER_4 bound_length __attribute__((unused)))
296 eoshift1 (ret, array, h, pbound, pwhich, " ", 1);
300 void eoshift1_'atype_kind`_char4 (gfc_array_char * const restrict,
302 const gfc_array_char * const restrict,
303 const 'atype` * const restrict,
304 const char * const restrict,
305 const 'atype_name` * const restrict,
306 GFC_INTEGER_4, GFC_INTEGER_4);
307 export_proto(eoshift1_'atype_kind`_char4);
310 eoshift1_'atype_kind`_char4 (gfc_array_char * const restrict ret,
311 GFC_INTEGER_4 ret_length __attribute__((unused)),
312 const gfc_array_char * const restrict array,
313 const 'atype` * const restrict h,
314 const char * const restrict pbound,
315 const 'atype_name` * const restrict pwhich,
316 GFC_INTEGER_4 array_length __attribute__((unused)),
317 GFC_INTEGER_4 bound_length __attribute__((unused)))
319 static const gfc_char4_t space = (unsigned char) ''` ''`;
320 eoshift1 (ret, array, h, pbound, pwhich,
321 (const char *) &space, sizeof (gfc_char4_t));