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6de9cd9a | 1 | `/* Implementation of the EOSHIFT intrinsic |
83ffe9cd | 2 | Copyright (C) 2002-2023 Free Software Foundation, Inc. |
6de9cd9a DN |
3 | Contributed by Paul Brook <paul@nowt.org> |
4 | ||
21d1335b | 5 | This file is part of the GNU Fortran runtime library (libgfortran). |
6de9cd9a | 6 | |
57dea9f6 TM |
7 | Libgfortran is free software; you can redistribute it and/or |
8 | modify it under the terms of the GNU General Public | |
6de9cd9a | 9 | License as published by the Free Software Foundation; either |
748086b7 | 10 | version 3 of the License, or (at your option) any later version. |
57dea9f6 TM |
11 | |
12 | Libgfortran is distributed in the hope that it will be useful, | |
6de9cd9a DN |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
57dea9f6 | 15 | GNU General Public License for more details. |
6de9cd9a | 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/>. */ | |
6de9cd9a | 25 | |
36ae8a61 | 26 | #include "libgfortran.h" |
36ae8a61 FXC |
27 | #include <string.h>' |
28 | ||
c9e66eda | 29 | include(iparm.m4)dnl |
6de9cd9a | 30 | |
adea5e16 | 31 | `#if defined (HAVE_'atype_name`) |
644cb69f | 32 | |
7823229b | 33 | static void |
64acfd99 JB |
34 | eoshift1 (gfc_array_char * const restrict ret, |
35 | const gfc_array_char * const restrict array, | |
adea5e16 | 36 | const 'atype` * const restrict h, |
64acfd99 | 37 | const char * const restrict pbound, |
adea5e16 | 38 | const 'atype_name` * const restrict pwhich, |
dfb55fdc | 39 | const char * filler, index_type filler_len) |
6de9cd9a DN |
40 | { |
41 | /* r.* indicates the return array. */ | |
e33e218b | 42 | index_type rstride[GFC_MAX_DIMENSIONS]; |
6de9cd9a DN |
43 | index_type rstride0; |
44 | index_type roffset; | |
45 | char *rptr; | |
5863aacf | 46 | char * restrict dest; |
6de9cd9a | 47 | /* s.* indicates the source array. */ |
e33e218b | 48 | index_type sstride[GFC_MAX_DIMENSIONS]; |
6de9cd9a DN |
49 | index_type sstride0; |
50 | index_type soffset; | |
51 | const char *sptr; | |
52 | const char *src; | |
adea5e16 | 53 | /* h.* indicates the shift array. */ |
e33e218b | 54 | index_type hstride[GFC_MAX_DIMENSIONS]; |
6de9cd9a | 55 | index_type hstride0; |
adea5e16 | 56 | const 'atype_name` *hptr; |
6de9cd9a | 57 | |
e33e218b TK |
58 | index_type count[GFC_MAX_DIMENSIONS]; |
59 | index_type extent[GFC_MAX_DIMENSIONS]; | |
6de9cd9a | 60 | index_type dim; |
6de9cd9a DN |
61 | index_type len; |
62 | index_type n; | |
dfb55fdc | 63 | index_type size; |
16bff921 | 64 | index_type arraysize; |
6de9cd9a | 65 | int which; |
adea5e16 TK |
66 | 'atype_name` sh; |
67 | 'atype_name` delta; | |
6de9cd9a | 68 | |
7672ae20 AJ |
69 | /* The compiler cannot figure out that these are set, initialize |
70 | them to avoid warnings. */ | |
71 | len = 0; | |
72 | soffset = 0; | |
73 | roffset = 0; | |
74 | ||
dfb55fdc TK |
75 | size = GFC_DESCRIPTOR_SIZE(array); |
76 | ||
6de9cd9a DN |
77 | if (pwhich) |
78 | which = *pwhich - 1; | |
79 | else | |
80 | which = 0; | |
81 | ||
6de9cd9a DN |
82 | extent[0] = 1; |
83 | count[0] = 0; | |
0e6d033b | 84 | |
16bff921 | 85 | arraysize = size0 ((array_t *) array); |
21d1335b | 86 | if (ret->base_addr == NULL) |
0e6d033b | 87 | { |
efd4dc1a | 88 | ret->offset = 0; |
fa3c4d47 | 89 | GFC_DTYPE_COPY(ret,array); |
7a157266 | 90 | for (index_type i = 0; i < GFC_DESCRIPTOR_RANK (array); i++) |
0e6d033b | 91 | { |
dfb55fdc TK |
92 | index_type ub, str; |
93 | ||
94 | ub = GFC_DESCRIPTOR_EXTENT(array,i) - 1; | |
0e6d033b TK |
95 | |
96 | if (i == 0) | |
dfb55fdc | 97 | str = 1; |
0e6d033b | 98 | else |
dfb55fdc TK |
99 | str = GFC_DESCRIPTOR_EXTENT(ret,i-1) |
100 | * GFC_DESCRIPTOR_STRIDE(ret,i-1); | |
101 | ||
102 | GFC_DIMENSION_SET(ret->dim[i], 0, ub, str); | |
103 | ||
0e6d033b | 104 | } |
92e6f3a4 JB |
105 | /* xmallocarray allocates a single byte for zero size. */ |
106 | ret->base_addr = xmallocarray (arraysize, size); | |
16bff921 | 107 | |
0e6d033b | 108 | } |
16bff921 | 109 | else if (unlikely (compile_options.bounds_check)) |
c44109aa | 110 | { |
16bff921 TK |
111 | bounds_equal_extents ((array_t *) ret, (array_t *) array, |
112 | "return value", "EOSHIFT"); | |
c44109aa | 113 | } |
0e6d033b | 114 | |
16bff921 TK |
115 | if (unlikely (compile_options.bounds_check)) |
116 | { | |
117 | bounds_reduced_extents ((array_t *) h, (array_t *) array, which, | |
118 | "SHIFT argument", "EOSHIFT"); | |
119 | } | |
120 | ||
121 | if (arraysize == 0) | |
122 | return; | |
123 | ||
6de9cd9a DN |
124 | n = 0; |
125 | for (dim = 0; dim < GFC_DESCRIPTOR_RANK (array); dim++) | |
126 | { | |
127 | if (dim == which) | |
128 | { | |
dfb55fdc | 129 | roffset = GFC_DESCRIPTOR_STRIDE_BYTES(ret,dim); |
6de9cd9a DN |
130 | if (roffset == 0) |
131 | roffset = size; | |
dfb55fdc | 132 | soffset = GFC_DESCRIPTOR_STRIDE_BYTES(array,dim); |
6de9cd9a DN |
133 | if (soffset == 0) |
134 | soffset = size; | |
dfb55fdc | 135 | len = GFC_DESCRIPTOR_EXTENT(array,dim); |
6de9cd9a DN |
136 | } |
137 | else | |
138 | { | |
139 | count[n] = 0; | |
dfb55fdc TK |
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); | |
6de9cd9a | 143 | |
dfb55fdc | 144 | hstride[n] = GFC_DESCRIPTOR_STRIDE(h,n); |
6de9cd9a DN |
145 | n++; |
146 | } | |
147 | } | |
148 | if (sstride[0] == 0) | |
149 | sstride[0] = size; | |
150 | if (rstride[0] == 0) | |
151 | rstride[0] = size; | |
152 | if (hstride[0] == 0) | |
153 | hstride[0] = 1; | |
154 | ||
155 | dim = GFC_DESCRIPTOR_RANK (array); | |
156 | rstride0 = rstride[0]; | |
157 | sstride0 = sstride[0]; | |
158 | hstride0 = hstride[0]; | |
21d1335b TB |
159 | rptr = ret->base_addr; |
160 | sptr = array->base_addr; | |
161 | hptr = h->base_addr; | |
6de9cd9a DN |
162 | |
163 | while (rptr) | |
164 | { | |
adea5e16 | 165 | /* Do the shift for this dimension. */ |
6de9cd9a | 166 | sh = *hptr; |
47b3a403 TK |
167 | if (( sh >= 0 ? sh : -sh ) > len) |
168 | { | |
169 | delta = len; | |
170 | sh = len; | |
171 | } | |
172 | else | |
173 | delta = (sh >= 0) ? sh: -sh; | |
174 | ||
6de9cd9a DN |
175 | if (sh > 0) |
176 | { | |
177 | src = &sptr[delta * soffset]; | |
178 | dest = rptr; | |
179 | } | |
180 | else | |
181 | { | |
182 | src = sptr; | |
183 | dest = &rptr[delta * roffset]; | |
184 | } | |
ba71a2a6 TK |
185 | |
186 | /* If the elements are contiguous, perform a single block move. */ | |
187 | if (soffset == size && roffset == size) | |
188 | { | |
189 | size_t chunk = size * (len - delta); | |
190 | memcpy (dest, src, chunk); | |
191 | dest += chunk; | |
192 | } | |
193 | else | |
194 | { | |
195 | for (n = 0; n < len - delta; n++) | |
196 | { | |
197 | memcpy (dest, src, size); | |
198 | dest += roffset; | |
199 | src += soffset; | |
200 | } | |
201 | } | |
6de9cd9a DN |
202 | if (sh < 0) |
203 | dest = rptr; | |
204 | n = delta; | |
205 | ||
7823229b RS |
206 | if (pbound) |
207 | while (n--) | |
208 | { | |
209 | memcpy (dest, pbound, size); | |
210 | dest += roffset; | |
211 | } | |
212 | else | |
213 | while (n--) | |
214 | { | |
691da334 FXC |
215 | index_type i; |
216 | ||
217 | if (filler_len == 1) | |
218 | memset (dest, filler[0], size); | |
219 | else | |
220 | for (i = 0; i < size; i += filler_len) | |
221 | memcpy (&dest[i], filler, filler_len); | |
222 | ||
7823229b RS |
223 | dest += roffset; |
224 | } | |
6de9cd9a DN |
225 | |
226 | /* Advance to the next section. */ | |
227 | rptr += rstride0; | |
228 | sptr += sstride0; | |
229 | hptr += hstride0; | |
230 | count[0]++; | |
231 | n = 0; | |
232 | while (count[n] == extent[n]) | |
233 | { | |
234 | /* When we get to the end of a dimension, reset it and increment | |
235 | the next dimension. */ | |
236 | count[n] = 0; | |
237 | /* We could precalculate these products, but this is a less | |
8b6dba81 | 238 | frequently used path so probably not worth it. */ |
6de9cd9a DN |
239 | rptr -= rstride[n] * extent[n]; |
240 | sptr -= sstride[n] * extent[n]; | |
241 | hptr -= hstride[n] * extent[n]; | |
242 | n++; | |
243 | if (n >= dim - 1) | |
244 | { | |
245 | /* Break out of the loop. */ | |
246 | rptr = NULL; | |
247 | break; | |
248 | } | |
249 | else | |
250 | { | |
251 | count[n]++; | |
252 | rptr += rstride[n]; | |
253 | sptr += sstride[n]; | |
254 | hptr += hstride[n]; | |
255 | } | |
256 | } | |
257 | } | |
258 | } | |
7823229b | 259 | |
adea5e16 | 260 | void eoshift1_'atype_kind` (gfc_array_char * const restrict, |
64acfd99 | 261 | const gfc_array_char * const restrict, |
adea5e16 TK |
262 | const 'atype` * const restrict, const char * const restrict, |
263 | const 'atype_name` * const restrict); | |
264 | export_proto(eoshift1_'atype_kind`); | |
7823229b RS |
265 | |
266 | void | |
adea5e16 | 267 | eoshift1_'atype_kind` (gfc_array_char * const restrict ret, |
64acfd99 | 268 | const gfc_array_char * const restrict array, |
adea5e16 | 269 | const 'atype` * const restrict h, |
64acfd99 | 270 | const char * const restrict pbound, |
adea5e16 | 271 | const 'atype_name` * const restrict pwhich) |
7823229b | 272 | { |
dfb55fdc | 273 | eoshift1 (ret, array, h, pbound, pwhich, "\0", 1); |
7823229b RS |
274 | } |
275 | ||
691da334 | 276 | |
adea5e16 | 277 | void eoshift1_'atype_kind`_char (gfc_array_char * const restrict, |
64acfd99 JB |
278 | GFC_INTEGER_4, |
279 | const gfc_array_char * const restrict, | |
adea5e16 | 280 | const 'atype` * const restrict, |
64acfd99 | 281 | const char * const restrict, |
adea5e16 | 282 | const 'atype_name` * const restrict, |
64acfd99 | 283 | GFC_INTEGER_4, GFC_INTEGER_4); |
adea5e16 | 284 | export_proto(eoshift1_'atype_kind`_char); |
7823229b RS |
285 | |
286 | void | |
adea5e16 | 287 | eoshift1_'atype_kind`_char (gfc_array_char * const restrict ret, |
64acfd99 JB |
288 | GFC_INTEGER_4 ret_length __attribute__((unused)), |
289 | const gfc_array_char * const restrict array, | |
adea5e16 | 290 | const 'atype` * const restrict h, |
64acfd99 | 291 | const char * const restrict pbound, |
adea5e16 | 292 | const 'atype_name` * const restrict pwhich, |
dfb55fdc | 293 | GFC_INTEGER_4 array_length __attribute__((unused)), |
64acfd99 | 294 | GFC_INTEGER_4 bound_length __attribute__((unused))) |
7823229b | 295 | { |
dfb55fdc | 296 | eoshift1 (ret, array, h, pbound, pwhich, " ", 1); |
691da334 FXC |
297 | } |
298 | ||
299 | ||
300 | void eoshift1_'atype_kind`_char4 (gfc_array_char * const restrict, | |
301 | GFC_INTEGER_4, | |
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); | |
308 | ||
309 | void | |
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, | |
dfb55fdc | 316 | GFC_INTEGER_4 array_length __attribute__((unused)), |
691da334 FXC |
317 | GFC_INTEGER_4 bound_length __attribute__((unused))) |
318 | { | |
319 | static const gfc_char4_t space = (unsigned char) ''` ''`; | |
dfb55fdc | 320 | eoshift1 (ret, array, h, pbound, pwhich, |
691da334 | 321 | (const char *) &space, sizeof (gfc_char4_t)); |
7823229b | 322 | } |
644cb69f | 323 | |
adea5e16 | 324 | #endif' |