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6de9cd9a | 1 | /* Implementation of the EOSHIFT intrinsic |
f0bcf628 | 2 | Copyright (C) 2002-2014 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" |
6de9cd9a DN |
27 | #include <stdlib.h> |
28 | #include <assert.h> | |
29 | #include <string.h> | |
36ae8a61 | 30 | |
6de9cd9a | 31 | |
644cb69f FXC |
32 | #if defined (HAVE_GFC_INTEGER_4) |
33 | ||
7823229b | 34 | static void |
64acfd99 JB |
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, | |
dfb55fdc | 40 | const char * filler, index_type filler_len) |
6de9cd9a DN |
41 | { |
42 | /* r.* indicates the return array. */ | |
e33e218b | 43 | index_type rstride[GFC_MAX_DIMENSIONS]; |
6de9cd9a DN |
44 | index_type rstride0; |
45 | index_type roffset; | |
46 | char *rptr; | |
5863aacf | 47 | char * restrict dest; |
6de9cd9a | 48 | /* s.* indicates the source array. */ |
e33e218b | 49 | index_type sstride[GFC_MAX_DIMENSIONS]; |
6de9cd9a DN |
50 | index_type sstride0; |
51 | index_type soffset; | |
52 | const char *sptr; | |
53 | const char *src; | |
54 | /* h.* indicates the shift array. */ | |
e33e218b | 55 | index_type hstride[GFC_MAX_DIMENSIONS]; |
6de9cd9a DN |
56 | index_type hstride0; |
57 | const GFC_INTEGER_4 *hptr; | |
58 | /* b.* indicates the bound array. */ | |
e33e218b | 59 | index_type bstride[GFC_MAX_DIMENSIONS]; |
6de9cd9a DN |
60 | index_type bstride0; |
61 | const char *bptr; | |
62 | ||
e33e218b TK |
63 | index_type count[GFC_MAX_DIMENSIONS]; |
64 | index_type extent[GFC_MAX_DIMENSIONS]; | |
6de9cd9a | 65 | index_type dim; |
6de9cd9a DN |
66 | index_type len; |
67 | index_type n; | |
dfb55fdc | 68 | index_type size; |
16bff921 | 69 | index_type arraysize; |
6de9cd9a DN |
70 | int which; |
71 | GFC_INTEGER_4 sh; | |
72 | GFC_INTEGER_4 delta; | |
73 | ||
7672ae20 AJ |
74 | /* The compiler cannot figure out that these are set, initialize |
75 | them to avoid warnings. */ | |
76 | len = 0; | |
77 | soffset = 0; | |
78 | roffset = 0; | |
79 | ||
16bff921 | 80 | arraysize = size0 ((array_t *) array); |
dfb55fdc TK |
81 | size = GFC_DESCRIPTOR_SIZE(array); |
82 | ||
6de9cd9a DN |
83 | if (pwhich) |
84 | which = *pwhich - 1; | |
85 | else | |
86 | which = 0; | |
87 | ||
21d1335b | 88 | if (ret->base_addr == NULL) |
0e6d033b TK |
89 | { |
90 | int i; | |
91 | ||
92e6f3a4 | 92 | ret->base_addr = xmallocarray (arraysize, size); |
efd4dc1a | 93 | ret->offset = 0; |
0e6d033b TK |
94 | ret->dtype = array->dtype; |
95 | for (i = 0; i < GFC_DESCRIPTOR_RANK (array); i++) | |
96 | { | |
dfb55fdc TK |
97 | index_type ub, str; |
98 | ||
99 | ub = GFC_DESCRIPTOR_EXTENT(array,i) - 1; | |
0e6d033b TK |
100 | |
101 | if (i == 0) | |
dfb55fdc | 102 | str = 1; |
0e6d033b | 103 | else |
dfb55fdc TK |
104 | str = GFC_DESCRIPTOR_EXTENT(ret,i-1) |
105 | * GFC_DESCRIPTOR_STRIDE(ret,i-1); | |
106 | ||
107 | GFC_DIMENSION_SET(ret->dim[i], 0, ub, str); | |
108 | ||
0e6d033b | 109 | } |
92e6f3a4 JB |
110 | /* xmallocarray allocates a single byte for zero size. */ |
111 | ret->base_addr = xmallocarray (arraysize, size); | |
16bff921 | 112 | |
0e6d033b | 113 | } |
16bff921 TK |
114 | else if (unlikely (compile_options.bounds_check)) |
115 | { | |
116 | bounds_equal_extents ((array_t *) ret, (array_t *) array, | |
117 | "return value", "EOSHIFT"); | |
118 | } | |
119 | ||
120 | if (unlikely (compile_options.bounds_check)) | |
c44109aa | 121 | { |
16bff921 TK |
122 | bounds_reduced_extents ((array_t *) h, (array_t *) array, which, |
123 | "SHIFT argument", "EOSHIFT"); | |
c44109aa | 124 | } |
0e6d033b | 125 | |
16bff921 TK |
126 | if (arraysize == 0) |
127 | return; | |
6de9cd9a DN |
128 | |
129 | extent[0] = 1; | |
130 | count[0] = 0; | |
6de9cd9a DN |
131 | n = 0; |
132 | for (dim = 0; dim < GFC_DESCRIPTOR_RANK (array); dim++) | |
133 | { | |
134 | if (dim == which) | |
135 | { | |
dfb55fdc | 136 | roffset = GFC_DESCRIPTOR_STRIDE_BYTES(ret,dim); |
6de9cd9a DN |
137 | if (roffset == 0) |
138 | roffset = size; | |
dfb55fdc | 139 | soffset = GFC_DESCRIPTOR_STRIDE_BYTES(array,dim); |
6de9cd9a DN |
140 | if (soffset == 0) |
141 | soffset = size; | |
dfb55fdc | 142 | len = GFC_DESCRIPTOR_EXTENT(array,dim); |
6de9cd9a DN |
143 | } |
144 | else | |
145 | { | |
146 | count[n] = 0; | |
dfb55fdc TK |
147 | extent[n] = GFC_DESCRIPTOR_EXTENT(array,dim); |
148 | rstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(ret,dim); | |
149 | sstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(array,dim); | |
6de9cd9a | 150 | |
dfb55fdc | 151 | hstride[n] = GFC_DESCRIPTOR_STRIDE(h,n); |
6de9cd9a | 152 | if (bound) |
dfb55fdc | 153 | bstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(bound,n); |
6de9cd9a DN |
154 | else |
155 | bstride[n] = 0; | |
156 | n++; | |
157 | } | |
158 | } | |
159 | if (sstride[0] == 0) | |
160 | sstride[0] = size; | |
161 | if (rstride[0] == 0) | |
162 | rstride[0] = size; | |
163 | if (hstride[0] == 0) | |
164 | hstride[0] = 1; | |
165 | if (bound && bstride[0] == 0) | |
166 | bstride[0] = size; | |
167 | ||
168 | dim = GFC_DESCRIPTOR_RANK (array); | |
169 | rstride0 = rstride[0]; | |
170 | sstride0 = sstride[0]; | |
171 | hstride0 = hstride[0]; | |
172 | bstride0 = bstride[0]; | |
21d1335b TB |
173 | rptr = ret->base_addr; |
174 | sptr = array->base_addr; | |
175 | hptr = h->base_addr; | |
6de9cd9a | 176 | if (bound) |
21d1335b | 177 | bptr = bound->base_addr; |
6de9cd9a | 178 | else |
7823229b | 179 | bptr = NULL; |
6de9cd9a DN |
180 | |
181 | while (rptr) | |
182 | { | |
183 | /* Do the shift for this dimension. */ | |
184 | sh = *hptr; | |
47b3a403 TK |
185 | if (( sh >= 0 ? sh : -sh ) > len) |
186 | { | |
187 | delta = len; | |
188 | sh = len; | |
189 | } | |
190 | else | |
191 | delta = (sh >= 0) ? sh: -sh; | |
192 | ||
6de9cd9a DN |
193 | if (sh > 0) |
194 | { | |
195 | src = &sptr[delta * soffset]; | |
196 | dest = rptr; | |
197 | } | |
198 | else | |
199 | { | |
200 | src = sptr; | |
201 | dest = &rptr[delta * roffset]; | |
202 | } | |
203 | for (n = 0; n < len - delta; n++) | |
204 | { | |
205 | memcpy (dest, src, size); | |
206 | dest += roffset; | |
207 | src += soffset; | |
208 | } | |
209 | if (sh < 0) | |
210 | dest = rptr; | |
211 | n = delta; | |
212 | ||
7823229b RS |
213 | if (bptr) |
214 | while (n--) | |
215 | { | |
216 | memcpy (dest, bptr, size); | |
217 | dest += roffset; | |
218 | } | |
219 | else | |
220 | while (n--) | |
221 | { | |
691da334 FXC |
222 | index_type i; |
223 | ||
224 | if (filler_len == 1) | |
225 | memset (dest, filler[0], size); | |
226 | else | |
227 | for (i = 0; i < size; i += filler_len) | |
228 | memcpy (&dest[i], filler, filler_len); | |
229 | ||
7823229b RS |
230 | dest += roffset; |
231 | } | |
6de9cd9a DN |
232 | |
233 | /* Advance to the next section. */ | |
234 | rptr += rstride0; | |
235 | sptr += sstride0; | |
236 | hptr += hstride0; | |
237 | bptr += bstride0; | |
238 | count[0]++; | |
239 | n = 0; | |
240 | while (count[n] == extent[n]) | |
241 | { | |
242 | /* When we get to the end of a dimension, reset it and increment | |
243 | the next dimension. */ | |
244 | count[n] = 0; | |
245 | /* We could precalculate these products, but this is a less | |
5d7adf7a | 246 | frequently used path so probably not worth it. */ |
6de9cd9a DN |
247 | rptr -= rstride[n] * extent[n]; |
248 | sptr -= sstride[n] * extent[n]; | |
249 | hptr -= hstride[n] * extent[n]; | |
250 | bptr -= bstride[n] * extent[n]; | |
251 | n++; | |
252 | if (n >= dim - 1) | |
253 | { | |
254 | /* Break out of the loop. */ | |
255 | rptr = NULL; | |
256 | break; | |
257 | } | |
258 | else | |
259 | { | |
260 | count[n]++; | |
261 | rptr += rstride[n]; | |
262 | sptr += sstride[n]; | |
263 | hptr += hstride[n]; | |
264 | bptr += bstride[n]; | |
265 | } | |
266 | } | |
267 | } | |
268 | } | |
7823229b | 269 | |
64acfd99 JB |
270 | extern void eoshift3_4 (gfc_array_char * const restrict, |
271 | const gfc_array_char * const restrict, | |
272 | const gfc_array_i4 * const restrict, | |
273 | const gfc_array_char * const restrict, | |
274 | const GFC_INTEGER_4 *); | |
7823229b RS |
275 | export_proto(eoshift3_4); |
276 | ||
277 | void | |
64acfd99 JB |
278 | eoshift3_4 (gfc_array_char * const restrict ret, |
279 | const gfc_array_char * const restrict array, | |
280 | const gfc_array_i4 * const restrict h, | |
281 | const gfc_array_char * const restrict bound, | |
282 | const GFC_INTEGER_4 * const restrict pwhich) | |
7823229b | 283 | { |
dfb55fdc | 284 | eoshift3 (ret, array, h, bound, pwhich, "\0", 1); |
7823229b RS |
285 | } |
286 | ||
691da334 | 287 | |
64acfd99 JB |
288 | extern void eoshift3_4_char (gfc_array_char * const restrict, |
289 | GFC_INTEGER_4, | |
290 | const gfc_array_char * const restrict, | |
291 | const gfc_array_i4 * const restrict, | |
292 | const gfc_array_char * const restrict, | |
293 | const GFC_INTEGER_4 * const restrict, | |
294 | GFC_INTEGER_4, GFC_INTEGER_4); | |
7823229b RS |
295 | export_proto(eoshift3_4_char); |
296 | ||
297 | void | |
64acfd99 JB |
298 | eoshift3_4_char (gfc_array_char * const restrict ret, |
299 | GFC_INTEGER_4 ret_length __attribute__((unused)), | |
300 | const gfc_array_char * const restrict array, | |
301 | const gfc_array_i4 * const restrict h, | |
302 | const gfc_array_char * const restrict bound, | |
303 | const GFC_INTEGER_4 * const restrict pwhich, | |
dfb55fdc | 304 | GFC_INTEGER_4 array_length __attribute__((unused)), |
64acfd99 | 305 | GFC_INTEGER_4 bound_length __attribute__((unused))) |
7823229b | 306 | { |
dfb55fdc | 307 | eoshift3 (ret, array, h, bound, pwhich, " ", 1); |
691da334 FXC |
308 | } |
309 | ||
310 | ||
311 | extern void eoshift3_4_char4 (gfc_array_char * const restrict, | |
312 | GFC_INTEGER_4, | |
313 | const gfc_array_char * const restrict, | |
314 | const gfc_array_i4 * const restrict, | |
315 | const gfc_array_char * const restrict, | |
316 | const GFC_INTEGER_4 * const restrict, | |
317 | GFC_INTEGER_4, GFC_INTEGER_4); | |
318 | export_proto(eoshift3_4_char4); | |
319 | ||
320 | void | |
321 | eoshift3_4_char4 (gfc_array_char * const restrict ret, | |
322 | GFC_INTEGER_4 ret_length __attribute__((unused)), | |
323 | const gfc_array_char * const restrict array, | |
324 | const gfc_array_i4 * const restrict h, | |
325 | const gfc_array_char * const restrict bound, | |
326 | const GFC_INTEGER_4 * const restrict pwhich, | |
dfb55fdc | 327 | GFC_INTEGER_4 array_length __attribute__((unused)), |
691da334 FXC |
328 | GFC_INTEGER_4 bound_length __attribute__((unused))) |
329 | { | |
330 | static const gfc_char4_t space = (unsigned char) ' '; | |
dfb55fdc | 331 | eoshift3 (ret, array, h, bound, pwhich, |
691da334 | 332 | (const char *) &space, sizeof (gfc_char4_t)); |
7823229b | 333 | } |
644cb69f FXC |
334 | |
335 | #endif |