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"
32 #if defined (HAVE_GFC_INTEGER_4)
35 eoshift3 (gfc_array_char * const restrict ret,
36 const gfc_array_char * const restrict array,
37 const gfc_array_i4 * const restrict h,
38 const gfc_array_char * const restrict bound,
39 const GFC_INTEGER_4 * const restrict pwhich,
40 const char * filler, index_type filler_len)
42 /* r.* indicates the return array. */
43 index_type rstride[GFC_MAX_DIMENSIONS];
48 /* s.* indicates the source array. */
49 index_type sstride[GFC_MAX_DIMENSIONS];
54 /* h.* indicates the shift array. */
55 index_type hstride[GFC_MAX_DIMENSIONS];
57 const GFC_INTEGER_4 *hptr;
58 /* b.* indicates the bound array. */
59 index_type bstride[GFC_MAX_DIMENSIONS];
63 index_type count[GFC_MAX_DIMENSIONS];
64 index_type extent[GFC_MAX_DIMENSIONS];
74 /* The compiler cannot figure out that these are set, initialize
75 them to avoid warnings. */
80 arraysize = size0 ((array_t *) array);
81 size = GFC_DESCRIPTOR_SIZE(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);
110 ret->data = internal_malloc_size (size * arraysize);
112 ret->data = internal_malloc_size (1);
115 else if (unlikely (compile_options.bounds_check))
117 bounds_equal_extents ((array_t *) ret, (array_t *) array,
118 "return value", "EOSHIFT");
121 if (unlikely (compile_options.bounds_check))
123 bounds_reduced_extents ((array_t *) h, (array_t *) array, which,
124 "SHIFT argument", "EOSHIFT");
133 for (dim = 0; dim < GFC_DESCRIPTOR_RANK (array); dim++)
137 roffset = GFC_DESCRIPTOR_STRIDE_BYTES(ret,dim);
140 soffset = GFC_DESCRIPTOR_STRIDE_BYTES(array,dim);
143 len = GFC_DESCRIPTOR_EXTENT(array,dim);
148 extent[n] = GFC_DESCRIPTOR_EXTENT(array,dim);
149 rstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(ret,dim);
150 sstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(array,dim);
152 hstride[n] = GFC_DESCRIPTOR_STRIDE(h,n);
154 bstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(bound,n);
166 if (bound && bstride[0] == 0)
169 dim = GFC_DESCRIPTOR_RANK (array);
170 rstride0 = rstride[0];
171 sstride0 = sstride[0];
172 hstride0 = hstride[0];
173 bstride0 = bstride[0];
184 /* Do the shift for this dimension. */
186 if (( sh >= 0 ? sh : -sh ) > len)
192 delta = (sh >= 0) ? sh: -sh;
196 src = &sptr[delta * soffset];
202 dest = &rptr[delta * roffset];
204 for (n = 0; n < len - delta; n++)
206 memcpy (dest, src, size);
217 memcpy (dest, bptr, size);
226 memset (dest, filler[0], size);
228 for (i = 0; i < size; i += filler_len)
229 memcpy (&dest[i], filler, filler_len);
234 /* Advance to the next section. */
241 while (count[n] == extent[n])
243 /* When we get to the end of a dimension, reset it and increment
244 the next dimension. */
246 /* We could precalculate these products, but this is a less
247 frequently used path so probably not worth it. */
248 rptr -= rstride[n] * extent[n];
249 sptr -= sstride[n] * extent[n];
250 hptr -= hstride[n] * extent[n];
251 bptr -= bstride[n] * extent[n];
255 /* Break out of the loop. */
271 extern void eoshift3_4 (gfc_array_char * const restrict,
272 const gfc_array_char * const restrict,
273 const gfc_array_i4 * const restrict,
274 const gfc_array_char * const restrict,
275 const GFC_INTEGER_4 *);
276 export_proto(eoshift3_4);
279 eoshift3_4 (gfc_array_char * const restrict ret,
280 const gfc_array_char * const restrict array,
281 const gfc_array_i4 * const restrict h,
282 const gfc_array_char * const restrict bound,
283 const GFC_INTEGER_4 * const restrict pwhich)
285 eoshift3 (ret, array, h, bound, pwhich, "\0", 1);
289 extern void eoshift3_4_char (gfc_array_char * const restrict,
291 const gfc_array_char * const restrict,
292 const gfc_array_i4 * const restrict,
293 const gfc_array_char * const restrict,
294 const GFC_INTEGER_4 * const restrict,
295 GFC_INTEGER_4, GFC_INTEGER_4);
296 export_proto(eoshift3_4_char);
299 eoshift3_4_char (gfc_array_char * const restrict ret,
300 GFC_INTEGER_4 ret_length __attribute__((unused)),
301 const gfc_array_char * const restrict array,
302 const gfc_array_i4 * const restrict h,
303 const gfc_array_char * const restrict bound,
304 const GFC_INTEGER_4 * const restrict pwhich,
305 GFC_INTEGER_4 array_length __attribute__((unused)),
306 GFC_INTEGER_4 bound_length __attribute__((unused)))
308 eoshift3 (ret, array, h, bound, pwhich, " ", 1);
312 extern void eoshift3_4_char4 (gfc_array_char * const restrict,
314 const gfc_array_char * const restrict,
315 const gfc_array_i4 * const restrict,
316 const gfc_array_char * const restrict,
317 const GFC_INTEGER_4 * const restrict,
318 GFC_INTEGER_4, GFC_INTEGER_4);
319 export_proto(eoshift3_4_char4);
322 eoshift3_4_char4 (gfc_array_char * const restrict ret,
323 GFC_INTEGER_4 ret_length __attribute__((unused)),
324 const gfc_array_char * const restrict array,
325 const gfc_array_i4 * const restrict h,
326 const gfc_array_char * const restrict bound,
327 const GFC_INTEGER_4 * const restrict pwhich,
328 GFC_INTEGER_4 array_length __attribute__((unused)),
329 GFC_INTEGER_4 bound_length __attribute__((unused)))
331 static const gfc_char4_t space = (unsigned char) ' ';
332 eoshift3 (ret, array, h, bound, pwhich,
333 (const char *) &space, sizeof (gfc_char4_t));