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644cb69f | 1 | /* Implementation of the EOSHIFT intrinsic |
a945c346 | 2 | Copyright (C) 2002-2024 Free Software Foundation, Inc. |
644cb69f FXC |
3 | Contributed by Paul Brook <paul@nowt.org> |
4 | ||
21d1335b | 5 | This file is part of the GNU Fortran runtime library (libgfortran). |
644cb69f FXC |
6 | |
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 | |
748086b7 | 10 | version 3 of the License, or (at your option) any later version. |
644cb69f FXC |
11 | |
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. | |
16 | ||
748086b7 JJ |
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. | |
20 | ||
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/>. */ | |
644cb69f | 25 | |
36ae8a61 | 26 | #include "libgfortran.h" |
644cb69f | 27 | #include <string.h> |
36ae8a61 | 28 | |
644cb69f FXC |
29 | |
30 | #if defined (HAVE_GFC_INTEGER_16) | |
31 | ||
32 | static void | |
64acfd99 JB |
33 | eoshift3 (gfc_array_char * const restrict ret, |
34 | const gfc_array_char * const restrict array, | |
35 | const gfc_array_i16 * const restrict h, | |
36 | const gfc_array_char * const restrict bound, | |
37 | const GFC_INTEGER_16 * const restrict pwhich, | |
dfb55fdc | 38 | const char * filler, index_type filler_len) |
644cb69f FXC |
39 | { |
40 | /* r.* indicates the return array. */ | |
41 | index_type rstride[GFC_MAX_DIMENSIONS]; | |
42 | index_type rstride0; | |
43 | index_type roffset; | |
44 | char *rptr; | |
5863aacf | 45 | char * restrict dest; |
644cb69f FXC |
46 | /* s.* indicates the source array. */ |
47 | index_type sstride[GFC_MAX_DIMENSIONS]; | |
48 | index_type sstride0; | |
49 | index_type soffset; | |
50 | const char *sptr; | |
51 | const char *src; | |
52 | /* h.* indicates the shift array. */ | |
53 | index_type hstride[GFC_MAX_DIMENSIONS]; | |
54 | index_type hstride0; | |
55 | const GFC_INTEGER_16 *hptr; | |
56 | /* b.* indicates the bound array. */ | |
57 | index_type bstride[GFC_MAX_DIMENSIONS]; | |
58 | index_type bstride0; | |
59 | const char *bptr; | |
60 | ||
61 | index_type count[GFC_MAX_DIMENSIONS]; | |
62 | index_type extent[GFC_MAX_DIMENSIONS]; | |
63 | index_type dim; | |
64 | index_type len; | |
65 | index_type n; | |
dfb55fdc | 66 | index_type size; |
16bff921 | 67 | index_type arraysize; |
644cb69f FXC |
68 | int which; |
69 | GFC_INTEGER_16 sh; | |
70 | GFC_INTEGER_16 delta; | |
71 | ||
72 | /* The compiler cannot figure out that these are set, initialize | |
73 | them to avoid warnings. */ | |
74 | len = 0; | |
75 | soffset = 0; | |
76 | roffset = 0; | |
77 | ||
16bff921 | 78 | arraysize = size0 ((array_t *) array); |
dfb55fdc TK |
79 | size = GFC_DESCRIPTOR_SIZE(array); |
80 | ||
644cb69f FXC |
81 | if (pwhich) |
82 | which = *pwhich - 1; | |
83 | else | |
84 | which = 0; | |
85 | ||
21d1335b | 86 | if (ret->base_addr == NULL) |
644cb69f | 87 | { |
92e6f3a4 | 88 | ret->base_addr = xmallocarray (arraysize, size); |
644cb69f | 89 | ret->offset = 0; |
fa3c4d47 | 90 | GFC_DTYPE_COPY(ret,array); |
7a157266 | 91 | for (index_type i = 0; i < GFC_DESCRIPTOR_RANK (array); i++) |
644cb69f | 92 | { |
dfb55fdc TK |
93 | index_type ub, str; |
94 | ||
95 | ub = GFC_DESCRIPTOR_EXTENT(array,i) - 1; | |
644cb69f FXC |
96 | |
97 | if (i == 0) | |
dfb55fdc | 98 | str = 1; |
644cb69f | 99 | else |
dfb55fdc TK |
100 | str = GFC_DESCRIPTOR_EXTENT(ret,i-1) |
101 | * GFC_DESCRIPTOR_STRIDE(ret,i-1); | |
102 | ||
103 | GFC_DIMENSION_SET(ret->dim[i], 0, ub, str); | |
104 | ||
644cb69f | 105 | } |
92e6f3a4 JB |
106 | /* xmallocarray allocates a single byte for zero size. */ |
107 | ret->base_addr = xmallocarray (arraysize, size); | |
16bff921 | 108 | |
644cb69f | 109 | } |
16bff921 TK |
110 | else if (unlikely (compile_options.bounds_check)) |
111 | { | |
112 | bounds_equal_extents ((array_t *) ret, (array_t *) array, | |
113 | "return value", "EOSHIFT"); | |
114 | } | |
115 | ||
116 | if (unlikely (compile_options.bounds_check)) | |
c44109aa | 117 | { |
16bff921 TK |
118 | bounds_reduced_extents ((array_t *) h, (array_t *) array, which, |
119 | "SHIFT argument", "EOSHIFT"); | |
c44109aa | 120 | } |
644cb69f | 121 | |
16bff921 TK |
122 | if (arraysize == 0) |
123 | return; | |
644cb69f FXC |
124 | |
125 | extent[0] = 1; | |
126 | count[0] = 0; | |
127 | n = 0; | |
128 | for (dim = 0; dim < GFC_DESCRIPTOR_RANK (array); dim++) | |
129 | { | |
130 | if (dim == which) | |
131 | { | |
dfb55fdc | 132 | roffset = GFC_DESCRIPTOR_STRIDE_BYTES(ret,dim); |
644cb69f FXC |
133 | if (roffset == 0) |
134 | roffset = size; | |
dfb55fdc | 135 | soffset = GFC_DESCRIPTOR_STRIDE_BYTES(array,dim); |
644cb69f FXC |
136 | if (soffset == 0) |
137 | soffset = size; | |
dfb55fdc | 138 | len = GFC_DESCRIPTOR_EXTENT(array,dim); |
644cb69f FXC |
139 | } |
140 | else | |
141 | { | |
142 | count[n] = 0; | |
dfb55fdc TK |
143 | extent[n] = GFC_DESCRIPTOR_EXTENT(array,dim); |
144 | rstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(ret,dim); | |
145 | sstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(array,dim); | |
644cb69f | 146 | |
dfb55fdc | 147 | hstride[n] = GFC_DESCRIPTOR_STRIDE(h,n); |
644cb69f | 148 | if (bound) |
dfb55fdc | 149 | bstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(bound,n); |
644cb69f FXC |
150 | else |
151 | bstride[n] = 0; | |
152 | n++; | |
153 | } | |
154 | } | |
155 | if (sstride[0] == 0) | |
156 | sstride[0] = size; | |
157 | if (rstride[0] == 0) | |
158 | rstride[0] = size; | |
159 | if (hstride[0] == 0) | |
160 | hstride[0] = 1; | |
161 | if (bound && bstride[0] == 0) | |
162 | bstride[0] = size; | |
163 | ||
164 | dim = GFC_DESCRIPTOR_RANK (array); | |
165 | rstride0 = rstride[0]; | |
166 | sstride0 = sstride[0]; | |
167 | hstride0 = hstride[0]; | |
168 | bstride0 = bstride[0]; | |
21d1335b TB |
169 | rptr = ret->base_addr; |
170 | sptr = array->base_addr; | |
171 | hptr = h->base_addr; | |
644cb69f | 172 | if (bound) |
21d1335b | 173 | bptr = bound->base_addr; |
644cb69f FXC |
174 | else |
175 | bptr = NULL; | |
176 | ||
177 | while (rptr) | |
178 | { | |
179 | /* Do the shift for this dimension. */ | |
180 | sh = *hptr; | |
181 | if (( sh >= 0 ? sh : -sh ) > len) | |
182 | { | |
183 | delta = len; | |
184 | sh = len; | |
185 | } | |
186 | else | |
187 | delta = (sh >= 0) ? sh: -sh; | |
188 | ||
189 | if (sh > 0) | |
190 | { | |
191 | src = &sptr[delta * soffset]; | |
192 | dest = rptr; | |
193 | } | |
194 | else | |
195 | { | |
196 | src = sptr; | |
197 | dest = &rptr[delta * roffset]; | |
198 | } | |
ba71a2a6 TK |
199 | |
200 | /* If the elements are contiguous, perform a single block move. */ | |
201 | if (soffset == size && roffset == size) | |
202 | { | |
203 | size_t chunk = size * (len - delta); | |
204 | memcpy (dest, src, chunk); | |
205 | dest += chunk; | |
206 | } | |
207 | else | |
208 | { | |
209 | for (n = 0; n < len - delta; n++) | |
210 | { | |
211 | memcpy (dest, src, size); | |
212 | dest += roffset; | |
213 | src += soffset; | |
214 | } | |
215 | } | |
216 | ||
644cb69f FXC |
217 | if (sh < 0) |
218 | dest = rptr; | |
219 | n = delta; | |
220 | ||
221 | if (bptr) | |
222 | while (n--) | |
223 | { | |
224 | memcpy (dest, bptr, size); | |
225 | dest += roffset; | |
226 | } | |
227 | else | |
228 | while (n--) | |
229 | { | |
691da334 FXC |
230 | index_type i; |
231 | ||
232 | if (filler_len == 1) | |
233 | memset (dest, filler[0], size); | |
234 | else | |
235 | for (i = 0; i < size; i += filler_len) | |
236 | memcpy (&dest[i], filler, filler_len); | |
237 | ||
644cb69f FXC |
238 | dest += roffset; |
239 | } | |
240 | ||
241 | /* Advance to the next section. */ | |
242 | rptr += rstride0; | |
243 | sptr += sstride0; | |
244 | hptr += hstride0; | |
245 | bptr += bstride0; | |
246 | count[0]++; | |
247 | n = 0; | |
248 | while (count[n] == extent[n]) | |
249 | { | |
250 | /* When we get to the end of a dimension, reset it and increment | |
251 | the next dimension. */ | |
252 | count[n] = 0; | |
253 | /* We could precalculate these products, but this is a less | |
5d7adf7a | 254 | frequently used path so probably not worth it. */ |
644cb69f FXC |
255 | rptr -= rstride[n] * extent[n]; |
256 | sptr -= sstride[n] * extent[n]; | |
257 | hptr -= hstride[n] * extent[n]; | |
258 | bptr -= bstride[n] * extent[n]; | |
259 | n++; | |
260 | if (n >= dim - 1) | |
261 | { | |
262 | /* Break out of the loop. */ | |
263 | rptr = NULL; | |
264 | break; | |
265 | } | |
266 | else | |
267 | { | |
268 | count[n]++; | |
269 | rptr += rstride[n]; | |
270 | sptr += sstride[n]; | |
271 | hptr += hstride[n]; | |
272 | bptr += bstride[n]; | |
273 | } | |
274 | } | |
275 | } | |
276 | } | |
277 | ||
64acfd99 JB |
278 | extern void eoshift3_16 (gfc_array_char * const restrict, |
279 | const gfc_array_char * const restrict, | |
280 | const gfc_array_i16 * const restrict, | |
281 | const gfc_array_char * const restrict, | |
282 | const GFC_INTEGER_16 *); | |
644cb69f FXC |
283 | export_proto(eoshift3_16); |
284 | ||
285 | void | |
64acfd99 JB |
286 | eoshift3_16 (gfc_array_char * const restrict ret, |
287 | const gfc_array_char * const restrict array, | |
288 | const gfc_array_i16 * const restrict h, | |
289 | const gfc_array_char * const restrict bound, | |
290 | const GFC_INTEGER_16 * const restrict pwhich) | |
644cb69f | 291 | { |
dfb55fdc | 292 | eoshift3 (ret, array, h, bound, pwhich, "\0", 1); |
644cb69f FXC |
293 | } |
294 | ||
691da334 | 295 | |
64acfd99 JB |
296 | extern void eoshift3_16_char (gfc_array_char * const restrict, |
297 | GFC_INTEGER_4, | |
298 | const gfc_array_char * const restrict, | |
299 | const gfc_array_i16 * const restrict, | |
300 | const gfc_array_char * const restrict, | |
301 | const GFC_INTEGER_16 * const restrict, | |
302 | GFC_INTEGER_4, GFC_INTEGER_4); | |
644cb69f FXC |
303 | export_proto(eoshift3_16_char); |
304 | ||
305 | void | |
64acfd99 JB |
306 | eoshift3_16_char (gfc_array_char * const restrict ret, |
307 | GFC_INTEGER_4 ret_length __attribute__((unused)), | |
308 | const gfc_array_char * const restrict array, | |
309 | const gfc_array_i16 * const restrict h, | |
310 | const gfc_array_char * const restrict bound, | |
311 | const GFC_INTEGER_16 * const restrict pwhich, | |
dfb55fdc | 312 | GFC_INTEGER_4 array_length __attribute__((unused)), |
64acfd99 | 313 | GFC_INTEGER_4 bound_length __attribute__((unused))) |
644cb69f | 314 | { |
dfb55fdc | 315 | eoshift3 (ret, array, h, bound, pwhich, " ", 1); |
691da334 FXC |
316 | } |
317 | ||
318 | ||
319 | extern void eoshift3_16_char4 (gfc_array_char * const restrict, | |
320 | GFC_INTEGER_4, | |
321 | const gfc_array_char * const restrict, | |
322 | const gfc_array_i16 * const restrict, | |
323 | const gfc_array_char * const restrict, | |
324 | const GFC_INTEGER_16 * const restrict, | |
325 | GFC_INTEGER_4, GFC_INTEGER_4); | |
326 | export_proto(eoshift3_16_char4); | |
327 | ||
328 | void | |
329 | eoshift3_16_char4 (gfc_array_char * const restrict ret, | |
330 | GFC_INTEGER_4 ret_length __attribute__((unused)), | |
331 | const gfc_array_char * const restrict array, | |
332 | const gfc_array_i16 * const restrict h, | |
333 | const gfc_array_char * const restrict bound, | |
334 | const GFC_INTEGER_16 * const restrict pwhich, | |
dfb55fdc | 335 | GFC_INTEGER_4 array_length __attribute__((unused)), |
691da334 FXC |
336 | GFC_INTEGER_4 bound_length __attribute__((unused))) |
337 | { | |
338 | static const gfc_char4_t space = (unsigned char) ' '; | |
dfb55fdc | 339 | eoshift3 (ret, array, h, bound, pwhich, |
691da334 | 340 | (const char *) &space, sizeof (gfc_char4_t)); |
644cb69f FXC |
341 | } |
342 | ||
343 | #endif |