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 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)
91 ret->dtype = array->dtype;
92 for (i = 0; i < GFC_DESCRIPTOR_RANK (array); i++)
96 ub = GFC_DESCRIPTOR_EXTENT(array,i) - 1;
101 str = GFC_DESCRIPTOR_EXTENT(ret,i-1)
102 * GFC_DESCRIPTOR_STRIDE(ret,i-1);
104 GFC_DIMENSION_SET(ret->dim[i], 0, ub, str);
107 /* xmallocarray allocates a single byte for zero size. */
108 ret->base_addr = xmallocarray (arraysize, size);
111 else if (unlikely (compile_options.bounds_check))
113 bounds_equal_extents ((array_t *) ret, (array_t *) array,
114 "return value", "EOSHIFT");
117 if (unlikely (compile_options.bounds_check))
119 bounds_reduced_extents ((array_t *) h, (array_t *) array, which,
120 "SHIFT argument", "EOSHIFT");
127 for (dim = 0; dim < GFC_DESCRIPTOR_RANK (array); dim++)
131 roffset = GFC_DESCRIPTOR_STRIDE_BYTES(ret,dim);
134 soffset = GFC_DESCRIPTOR_STRIDE_BYTES(array,dim);
137 len = GFC_DESCRIPTOR_EXTENT(array,dim);
142 extent[n] = GFC_DESCRIPTOR_EXTENT(array,dim);
143 rstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(ret,dim);
144 sstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(array,dim);
146 hstride[n] = GFC_DESCRIPTOR_STRIDE(h,n);
157 dim = GFC_DESCRIPTOR_RANK (array);
158 rstride0 = rstride[0];
159 sstride0 = sstride[0];
160 hstride0 = hstride[0];
161 rptr = ret->base_addr;
162 sptr = array->base_addr;
167 /* Do the shift for this dimension. */
169 if (( sh >= 0 ? sh : -sh ) > len)
175 delta = (sh >= 0) ? sh: -sh;
179 src = &sptr[delta * soffset];
185 dest = &rptr[delta * roffset];
187 for (n = 0; n < len - delta; n++)
189 memcpy (dest, src, size);
200 memcpy (dest, pbound, size);
209 memset (dest, filler[0], size);
211 for (i = 0; i < size; i += filler_len)
212 memcpy (&dest[i], filler, filler_len);
217 /* Advance to the next section. */
223 while (count[n] == extent[n])
225 /* When we get to the end of a dimension, reset it and increment
226 the next dimension. */
228 /* We could precalculate these products, but this is a less
229 frequently used path so probably not worth it. */
230 rptr -= rstride[n] * extent[n];
231 sptr -= sstride[n] * extent[n];
232 hptr -= hstride[n] * extent[n];
236 /* Break out of the loop. */
251 void eoshift1_'atype_kind` (gfc_array_char * const restrict,
252 const gfc_array_char * const restrict,
253 const 'atype` * const restrict, const char * const restrict,
254 const 'atype_name` * const restrict);
255 export_proto(eoshift1_'atype_kind`);
258 eoshift1_'atype_kind` (gfc_array_char * const restrict ret,
259 const gfc_array_char * const restrict array,
260 const 'atype` * const restrict h,
261 const char * const restrict pbound,
262 const 'atype_name` * const restrict pwhich)
264 eoshift1 (ret, array, h, pbound, pwhich, "\0", 1);
268 void eoshift1_'atype_kind`_char (gfc_array_char * const restrict,
270 const gfc_array_char * const restrict,
271 const 'atype` * const restrict,
272 const char * const restrict,
273 const 'atype_name` * const restrict,
274 GFC_INTEGER_4, GFC_INTEGER_4);
275 export_proto(eoshift1_'atype_kind`_char);
278 eoshift1_'atype_kind`_char (gfc_array_char * const restrict ret,
279 GFC_INTEGER_4 ret_length __attribute__((unused)),
280 const gfc_array_char * const restrict array,
281 const 'atype` * const restrict h,
282 const char * const restrict pbound,
283 const 'atype_name` * const restrict pwhich,
284 GFC_INTEGER_4 array_length __attribute__((unused)),
285 GFC_INTEGER_4 bound_length __attribute__((unused)))
287 eoshift1 (ret, array, h, pbound, pwhich, " ", 1);
291 void eoshift1_'atype_kind`_char4 (gfc_array_char * const restrict,
293 const gfc_array_char * const restrict,
294 const 'atype` * const restrict,
295 const char * const restrict,
296 const 'atype_name` * const restrict,
297 GFC_INTEGER_4, GFC_INTEGER_4);
298 export_proto(eoshift1_'atype_kind`_char4);
301 eoshift1_'atype_kind`_char4 (gfc_array_char * const restrict ret,
302 GFC_INTEGER_4 ret_length __attribute__((unused)),
303 const gfc_array_char * const restrict array,
304 const 'atype` * const restrict h,
305 const char * const restrict pbound,
306 const 'atype_name` * const restrict pwhich,
307 GFC_INTEGER_4 array_length __attribute__((unused)),
308 GFC_INTEGER_4 bound_length __attribute__((unused)))
310 static const gfc_char4_t space = (unsigned char) ''` ''`;
311 eoshift1 (ret, array, h, pbound, pwhich,
312 (const char *) &space, sizeof (gfc_char4_t));