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ddc9995b | 1 | /* Implementation of the MAXLOC intrinsic |
a5544970 | 2 | Copyright (C) 2017-2019 Free Software Foundation, Inc. |
ddc9995b TK |
3 | Contributed by Thomas Koenig |
4 | ||
5 | This file is part of the GNU Fortran runtime library (libgfortran). | |
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 | |
10 | version 3 of the License, or (at your option) any later version. | |
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 | ||
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/>. */ | |
25 | ||
26 | #include "libgfortran.h" | |
27 | #include <stdlib.h> | |
28 | #include <string.h> | |
29 | #include <assert.h> | |
30 | #include <limits.h> | |
31 | ||
32 | ||
01ce9e31 | 33 | #if defined (HAVE_GFC_UINTEGER_4) && defined (HAVE_GFC_INTEGER_8) |
ddc9995b | 34 | |
64b1806b TK |
35 | #define HAVE_BACK_ARG 1 |
36 | ||
ddc9995b | 37 | static inline int |
01ce9e31 | 38 | compare_fcn (const GFC_UINTEGER_4 *a, const GFC_UINTEGER_4 *b, gfc_charlen_type n) |
ddc9995b | 39 | { |
01ce9e31 | 40 | if (sizeof (GFC_UINTEGER_4) == 1) |
ddc9995b TK |
41 | return memcmp (a, b, n); |
42 | else | |
43 | return memcmp_char4 (a, b, n); | |
44 | ||
45 | } | |
46 | ||
47 | extern void maxloc0_8_s4 (gfc_array_i8 * const restrict retarray, | |
64b1806b | 48 | gfc_array_s4 * const restrict array, GFC_LOGICAL_4 back, gfc_charlen_type len); |
ddc9995b TK |
49 | export_proto(maxloc0_8_s4); |
50 | ||
51 | void | |
52 | maxloc0_8_s4 (gfc_array_i8 * const restrict retarray, | |
64b1806b | 53 | gfc_array_s4 * const restrict array, GFC_LOGICAL_4 back, gfc_charlen_type len) |
ddc9995b TK |
54 | { |
55 | index_type count[GFC_MAX_DIMENSIONS]; | |
56 | index_type extent[GFC_MAX_DIMENSIONS]; | |
57 | index_type sstride[GFC_MAX_DIMENSIONS]; | |
58 | index_type dstride; | |
01ce9e31 | 59 | const GFC_UINTEGER_4 *base; |
ddc9995b TK |
60 | GFC_INTEGER_8 * restrict dest; |
61 | index_type rank; | |
62 | index_type n; | |
63 | ||
64 | rank = GFC_DESCRIPTOR_RANK (array); | |
65 | if (rank <= 0) | |
66 | runtime_error ("Rank of array needs to be > 0"); | |
67 | ||
68 | if (retarray->base_addr == NULL) | |
69 | { | |
70 | GFC_DIMENSION_SET(retarray->dim[0], 0, rank-1, 1); | |
ca708a2b | 71 | retarray->dtype.rank = 1; |
ddc9995b TK |
72 | retarray->offset = 0; |
73 | retarray->base_addr = xmallocarray (rank, sizeof (GFC_INTEGER_8)); | |
74 | } | |
75 | else | |
76 | { | |
77 | if (unlikely (compile_options.bounds_check)) | |
78 | bounds_iforeach_return ((array_t *) retarray, (array_t *) array, | |
79 | "MAXLOC"); | |
80 | } | |
81 | ||
82 | dstride = GFC_DESCRIPTOR_STRIDE(retarray,0); | |
83 | dest = retarray->base_addr; | |
84 | for (n = 0; n < rank; n++) | |
85 | { | |
86 | sstride[n] = GFC_DESCRIPTOR_STRIDE(array,n) * len; | |
87 | extent[n] = GFC_DESCRIPTOR_EXTENT(array,n); | |
88 | count[n] = 0; | |
89 | if (extent[n] <= 0) | |
90 | { | |
91 | /* Set the return value. */ | |
92 | for (n = 0; n < rank; n++) | |
93 | dest[n * dstride] = 0; | |
94 | return; | |
95 | } | |
96 | } | |
97 | ||
98 | base = array->base_addr; | |
99 | ||
100 | /* Initialize the return value. */ | |
101 | for (n = 0; n < rank; n++) | |
102 | dest[n * dstride] = 1; | |
103 | { | |
104 | ||
01ce9e31 | 105 | const GFC_UINTEGER_4 *maxval; |
b573f931 | 106 | maxval = NULL; |
ddc9995b TK |
107 | |
108 | while (base) | |
109 | { | |
110 | do | |
111 | { | |
112 | /* Implementation start. */ | |
113 | ||
b573f931 TK |
114 | if (maxval == NULL || (back ? compare_fcn (base, maxval, len) >= 0 : |
115 | compare_fcn (base, maxval, len) > 0)) | |
ddc9995b TK |
116 | { |
117 | maxval = base; | |
118 | for (n = 0; n < rank; n++) | |
119 | dest[n * dstride] = count[n] + 1; | |
120 | } | |
121 | /* Implementation end. */ | |
122 | /* Advance to the next element. */ | |
123 | base += sstride[0]; | |
124 | } | |
125 | while (++count[0] != extent[0]); | |
126 | n = 0; | |
127 | do | |
128 | { | |
129 | /* When we get to the end of a dimension, reset it and increment | |
130 | the next dimension. */ | |
131 | count[n] = 0; | |
132 | /* We could precalculate these products, but this is a less | |
133 | frequently used path so probably not worth it. */ | |
134 | base -= sstride[n] * extent[n]; | |
135 | n++; | |
136 | if (n >= rank) | |
137 | { | |
138 | /* Break out of the loop. */ | |
139 | base = NULL; | |
140 | break; | |
141 | } | |
142 | else | |
143 | { | |
144 | count[n]++; | |
145 | base += sstride[n]; | |
146 | } | |
147 | } | |
148 | while (count[n] == extent[n]); | |
149 | } | |
150 | } | |
151 | } | |
152 | ||
153 | ||
154 | extern void mmaxloc0_8_s4 (gfc_array_i8 * const restrict, | |
64b1806b TK |
155 | gfc_array_s4 * const restrict, gfc_array_l1 * const restrict , GFC_LOGICAL_4 back, |
156 | gfc_charlen_type len); | |
ddc9995b TK |
157 | export_proto(mmaxloc0_8_s4); |
158 | ||
159 | void | |
160 | mmaxloc0_8_s4 (gfc_array_i8 * const restrict retarray, | |
161 | gfc_array_s4 * const restrict array, | |
64b1806b TK |
162 | gfc_array_l1 * const restrict mask, GFC_LOGICAL_4 back, |
163 | gfc_charlen_type len) | |
ddc9995b TK |
164 | { |
165 | index_type count[GFC_MAX_DIMENSIONS]; | |
166 | index_type extent[GFC_MAX_DIMENSIONS]; | |
167 | index_type sstride[GFC_MAX_DIMENSIONS]; | |
168 | index_type mstride[GFC_MAX_DIMENSIONS]; | |
169 | index_type dstride; | |
170 | GFC_INTEGER_8 *dest; | |
01ce9e31 | 171 | const GFC_UINTEGER_4 *base; |
ddc9995b TK |
172 | GFC_LOGICAL_1 *mbase; |
173 | int rank; | |
174 | index_type n; | |
175 | int mask_kind; | |
176 | ||
2ea47ee9 TK |
177 | if (mask == NULL) |
178 | { | |
179 | #ifdef HAVE_BACK_ARG | |
180 | maxloc0_8_s4 (retarray, array, back, len); | |
181 | #else | |
182 | maxloc0_8_s4 (retarray, array, len); | |
183 | #endif | |
184 | return; | |
185 | } | |
186 | ||
ddc9995b TK |
187 | rank = GFC_DESCRIPTOR_RANK (array); |
188 | if (rank <= 0) | |
189 | runtime_error ("Rank of array needs to be > 0"); | |
190 | ||
191 | if (retarray->base_addr == NULL) | |
192 | { | |
193 | GFC_DIMENSION_SET(retarray->dim[0], 0, rank - 1, 1); | |
ca708a2b | 194 | retarray->dtype.rank = 1; |
ddc9995b TK |
195 | retarray->offset = 0; |
196 | retarray->base_addr = xmallocarray (rank, sizeof (GFC_INTEGER_8)); | |
197 | } | |
198 | else | |
199 | { | |
200 | if (unlikely (compile_options.bounds_check)) | |
201 | { | |
202 | ||
203 | bounds_iforeach_return ((array_t *) retarray, (array_t *) array, | |
204 | "MAXLOC"); | |
205 | bounds_equal_extents ((array_t *) mask, (array_t *) array, | |
206 | "MASK argument", "MAXLOC"); | |
207 | } | |
208 | } | |
209 | ||
210 | mask_kind = GFC_DESCRIPTOR_SIZE (mask); | |
211 | ||
212 | mbase = mask->base_addr; | |
213 | ||
214 | if (mask_kind == 1 || mask_kind == 2 || mask_kind == 4 || mask_kind == 8 | |
215 | #ifdef HAVE_GFC_LOGICAL_16 | |
216 | || mask_kind == 16 | |
217 | #endif | |
218 | ) | |
219 | mbase = GFOR_POINTER_TO_L1 (mbase, mask_kind); | |
220 | else | |
221 | runtime_error ("Funny sized logical array"); | |
222 | ||
223 | dstride = GFC_DESCRIPTOR_STRIDE(retarray,0); | |
224 | dest = retarray->base_addr; | |
225 | for (n = 0; n < rank; n++) | |
226 | { | |
227 | sstride[n] = GFC_DESCRIPTOR_STRIDE(array,n) * len; | |
228 | mstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(mask,n); | |
229 | extent[n] = GFC_DESCRIPTOR_EXTENT(array,n); | |
230 | count[n] = 0; | |
231 | if (extent[n] <= 0) | |
232 | { | |
233 | /* Set the return value. */ | |
234 | for (n = 0; n < rank; n++) | |
235 | dest[n * dstride] = 0; | |
236 | return; | |
237 | } | |
238 | } | |
239 | ||
240 | base = array->base_addr; | |
241 | ||
242 | /* Initialize the return value. */ | |
243 | for (n = 0; n < rank; n++) | |
244 | dest[n * dstride] = 0; | |
245 | { | |
246 | ||
01ce9e31 | 247 | const GFC_UINTEGER_4 *maxval; |
ddc9995b TK |
248 | |
249 | maxval = NULL; | |
250 | ||
251 | while (base) | |
252 | { | |
253 | do | |
254 | { | |
255 | /* Implementation start. */ | |
256 | ||
b573f931 TK |
257 | if (*mbase && |
258 | (maxval == NULL || (back ? compare_fcn (base, maxval, len) >= 0: | |
259 | compare_fcn (base, maxval, len) > 0))) | |
ddc9995b TK |
260 | { |
261 | maxval = base; | |
262 | for (n = 0; n < rank; n++) | |
263 | dest[n * dstride] = count[n] + 1; | |
264 | } | |
265 | /* Implementation end. */ | |
266 | /* Advance to the next element. */ | |
267 | base += sstride[0]; | |
268 | mbase += mstride[0]; | |
269 | } | |
270 | while (++count[0] != extent[0]); | |
271 | n = 0; | |
272 | do | |
273 | { | |
274 | /* When we get to the end of a dimension, reset it and increment | |
275 | the next dimension. */ | |
276 | count[n] = 0; | |
277 | /* We could precalculate these products, but this is a less | |
278 | frequently used path so probably not worth it. */ | |
279 | base -= sstride[n] * extent[n]; | |
280 | mbase -= mstride[n] * extent[n]; | |
281 | n++; | |
282 | if (n >= rank) | |
283 | { | |
284 | /* Break out of the loop. */ | |
285 | base = NULL; | |
286 | break; | |
287 | } | |
288 | else | |
289 | { | |
290 | count[n]++; | |
291 | base += sstride[n]; | |
292 | mbase += mstride[n]; | |
293 | } | |
294 | } | |
295 | while (count[n] == extent[n]); | |
296 | } | |
297 | } | |
298 | } | |
299 | ||
300 | ||
301 | extern void smaxloc0_8_s4 (gfc_array_i8 * const restrict, | |
64b1806b TK |
302 | gfc_array_s4 * const restrict, GFC_LOGICAL_4 *, GFC_LOGICAL_4 back, |
303 | gfc_charlen_type len); | |
ddc9995b TK |
304 | export_proto(smaxloc0_8_s4); |
305 | ||
306 | void | |
307 | smaxloc0_8_s4 (gfc_array_i8 * const restrict retarray, | |
308 | gfc_array_s4 * const restrict array, | |
64b1806b TK |
309 | GFC_LOGICAL_4 * mask, GFC_LOGICAL_4 back, |
310 | gfc_charlen_type len) | |
ddc9995b TK |
311 | { |
312 | index_type rank; | |
313 | index_type dstride; | |
314 | index_type n; | |
315 | GFC_INTEGER_8 *dest; | |
316 | ||
2ea47ee9 | 317 | if (mask == NULL || *mask) |
ddc9995b | 318 | { |
64b1806b TK |
319 | #ifdef HAVE_BACK_ARG |
320 | maxloc0_8_s4 (retarray, array, back, len); | |
321 | #else | |
ddc9995b | 322 | maxloc0_8_s4 (retarray, array, len); |
64b1806b | 323 | #endif |
ddc9995b TK |
324 | return; |
325 | } | |
326 | ||
327 | rank = GFC_DESCRIPTOR_RANK (array); | |
328 | ||
329 | if (rank <= 0) | |
330 | runtime_error ("Rank of array needs to be > 0"); | |
331 | ||
332 | if (retarray->base_addr == NULL) | |
333 | { | |
334 | GFC_DIMENSION_SET(retarray->dim[0], 0, rank-1, 1); | |
ca708a2b | 335 | retarray->dtype.rank = 1; |
ddc9995b TK |
336 | retarray->offset = 0; |
337 | retarray->base_addr = xmallocarray (rank, sizeof (GFC_INTEGER_8)); | |
338 | } | |
339 | else if (unlikely (compile_options.bounds_check)) | |
340 | { | |
341 | bounds_iforeach_return ((array_t *) retarray, (array_t *) array, | |
342 | "MAXLOC"); | |
343 | } | |
344 | ||
345 | dstride = GFC_DESCRIPTOR_STRIDE(retarray,0); | |
346 | dest = retarray->base_addr; | |
347 | for (n = 0; n<rank; n++) | |
348 | dest[n * dstride] = 0 ; | |
349 | } | |
350 | #endif |