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644cb69f FXC |
1 | /* Implementation of the MAXLOC intrinsic |
2 | Copyright 2002 Free Software Foundation, Inc. | |
3 | Contributed by Paul Brook <paul@nowt.org> | |
4 | ||
5 | This file is part of the GNU Fortran 95 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 2 of the License, or (at your option) any later version. | |
11 | ||
12 | In addition to the permissions in the GNU General Public License, the | |
13 | Free Software Foundation gives you unlimited permission to link the | |
14 | compiled version of this file into combinations with other programs, | |
15 | and to distribute those combinations without any restriction coming | |
16 | from the use of this file. (The General Public License restrictions | |
17 | do apply in other respects; for example, they cover modification of | |
18 | the file, and distribution when not linked into a combine | |
19 | executable.) | |
20 | ||
21 | Libgfortran is distributed in the hope that it will be useful, | |
22 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
23 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
24 | GNU General Public License for more details. | |
25 | ||
26 | You should have received a copy of the GNU General Public | |
27 | License along with libgfortran; see the file COPYING. If not, | |
28 | write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, | |
29 | Boston, MA 02110-1301, USA. */ | |
30 | ||
31 | #include "config.h" | |
32 | #include <stdlib.h> | |
33 | #include <assert.h> | |
34 | #include <float.h> | |
35 | #include <limits.h> | |
36 | #include "libgfortran.h" | |
37 | ||
38 | ||
39 | #if defined (HAVE_GFC_INTEGER_4) && defined (HAVE_GFC_INTEGER_16) | |
40 | ||
41 | ||
64acfd99 JB |
42 | extern void maxloc0_16_i4 (gfc_array_i16 * const restrict retarray, |
43 | gfc_array_i4 * const restrict array); | |
644cb69f FXC |
44 | export_proto(maxloc0_16_i4); |
45 | ||
46 | void | |
64acfd99 JB |
47 | maxloc0_16_i4 (gfc_array_i16 * const restrict retarray, |
48 | gfc_array_i4 * const restrict array) | |
644cb69f FXC |
49 | { |
50 | index_type count[GFC_MAX_DIMENSIONS]; | |
51 | index_type extent[GFC_MAX_DIMENSIONS]; | |
52 | index_type sstride[GFC_MAX_DIMENSIONS]; | |
53 | index_type dstride; | |
64acfd99 | 54 | const GFC_INTEGER_4 *base; |
644cb69f FXC |
55 | GFC_INTEGER_16 *dest; |
56 | index_type rank; | |
57 | index_type n; | |
58 | ||
59 | rank = GFC_DESCRIPTOR_RANK (array); | |
60 | if (rank <= 0) | |
61 | runtime_error ("Rank of array needs to be > 0"); | |
62 | ||
63 | if (retarray->data == NULL) | |
64 | { | |
65 | retarray->dim[0].lbound = 0; | |
66 | retarray->dim[0].ubound = rank-1; | |
67 | retarray->dim[0].stride = 1; | |
68 | retarray->dtype = (retarray->dtype & ~GFC_DTYPE_RANK_MASK) | 1; | |
69 | retarray->offset = 0; | |
70 | retarray->data = internal_malloc_size (sizeof (GFC_INTEGER_16) * rank); | |
71 | } | |
72 | else | |
73 | { | |
74 | if (GFC_DESCRIPTOR_RANK (retarray) != 1) | |
75 | runtime_error ("rank of return array does not equal 1"); | |
76 | ||
77 | if (retarray->dim[0].ubound + 1 - retarray->dim[0].lbound != rank) | |
78 | runtime_error ("dimension of return array incorrect"); | |
79 | ||
80 | if (retarray->dim[0].stride == 0) | |
81 | retarray->dim[0].stride = 1; | |
82 | } | |
83 | ||
84 | /* TODO: It should be a front end job to correctly set the strides. */ | |
85 | ||
86 | if (array->dim[0].stride == 0) | |
87 | array->dim[0].stride = 1; | |
88 | ||
89 | dstride = retarray->dim[0].stride; | |
90 | dest = retarray->data; | |
91 | for (n = 0; n < rank; n++) | |
92 | { | |
93 | sstride[n] = array->dim[n].stride; | |
94 | extent[n] = array->dim[n].ubound + 1 - array->dim[n].lbound; | |
95 | count[n] = 0; | |
96 | if (extent[n] <= 0) | |
97 | { | |
98 | /* Set the return value. */ | |
99 | for (n = 0; n < rank; n++) | |
100 | dest[n * dstride] = 0; | |
101 | return; | |
102 | } | |
103 | } | |
104 | ||
105 | base = array->data; | |
106 | ||
107 | /* Initialize the return value. */ | |
108 | for (n = 0; n < rank; n++) | |
109 | dest[n * dstride] = 1; | |
110 | { | |
111 | ||
112 | GFC_INTEGER_4 maxval; | |
113 | ||
114 | maxval = -GFC_INTEGER_4_HUGE; | |
115 | ||
116 | while (base) | |
117 | { | |
118 | { | |
119 | /* Implementation start. */ | |
120 | ||
121 | if (*base > maxval) | |
122 | { | |
123 | maxval = *base; | |
124 | for (n = 0; n < rank; n++) | |
125 | dest[n * dstride] = count[n] + 1; | |
126 | } | |
127 | /* Implementation end. */ | |
128 | } | |
129 | /* Advance to the next element. */ | |
130 | count[0]++; | |
131 | base += sstride[0]; | |
132 | n = 0; | |
133 | while (count[n] == extent[n]) | |
134 | { | |
135 | /* When we get to the end of a dimension, reset it and increment | |
136 | the next dimension. */ | |
137 | count[n] = 0; | |
138 | /* We could precalculate these products, but this is a less | |
139 | frequently used path so proabably not worth it. */ | |
140 | base -= sstride[n] * extent[n]; | |
141 | n++; | |
142 | if (n == rank) | |
143 | { | |
144 | /* Break out of the loop. */ | |
145 | base = NULL; | |
146 | break; | |
147 | } | |
148 | else | |
149 | { | |
150 | count[n]++; | |
151 | base += sstride[n]; | |
152 | } | |
153 | } | |
154 | } | |
155 | } | |
156 | } | |
157 | ||
158 | ||
64acfd99 JB |
159 | extern void mmaxloc0_16_i4 (gfc_array_i16 * const restrict, |
160 | gfc_array_i4 * const restrict, gfc_array_l4 * const restrict); | |
644cb69f FXC |
161 | export_proto(mmaxloc0_16_i4); |
162 | ||
163 | void | |
64acfd99 JB |
164 | mmaxloc0_16_i4 (gfc_array_i16 * const restrict retarray, |
165 | gfc_array_i4 * const restrict array, | |
166 | gfc_array_l4 * const restrict mask) | |
644cb69f FXC |
167 | { |
168 | index_type count[GFC_MAX_DIMENSIONS]; | |
169 | index_type extent[GFC_MAX_DIMENSIONS]; | |
170 | index_type sstride[GFC_MAX_DIMENSIONS]; | |
171 | index_type mstride[GFC_MAX_DIMENSIONS]; | |
172 | index_type dstride; | |
173 | GFC_INTEGER_16 *dest; | |
64acfd99 | 174 | const GFC_INTEGER_4 *base; |
644cb69f FXC |
175 | GFC_LOGICAL_4 *mbase; |
176 | int rank; | |
177 | index_type n; | |
178 | ||
179 | rank = GFC_DESCRIPTOR_RANK (array); | |
180 | if (rank <= 0) | |
181 | runtime_error ("Rank of array needs to be > 0"); | |
182 | ||
183 | if (retarray->data == NULL) | |
184 | { | |
185 | retarray->dim[0].lbound = 0; | |
186 | retarray->dim[0].ubound = rank-1; | |
187 | retarray->dim[0].stride = 1; | |
188 | retarray->dtype = (retarray->dtype & ~GFC_DTYPE_RANK_MASK) | 1; | |
189 | retarray->offset = 0; | |
190 | retarray->data = internal_malloc_size (sizeof (GFC_INTEGER_16) * rank); | |
191 | } | |
192 | else | |
193 | { | |
194 | if (GFC_DESCRIPTOR_RANK (retarray) != 1) | |
195 | runtime_error ("rank of return array does not equal 1"); | |
196 | ||
197 | if (retarray->dim[0].ubound + 1 - retarray->dim[0].lbound != rank) | |
198 | runtime_error ("dimension of return array incorrect"); | |
199 | ||
200 | if (retarray->dim[0].stride == 0) | |
201 | retarray->dim[0].stride = 1; | |
202 | } | |
203 | ||
204 | /* TODO: It should be a front end job to correctly set the strides. */ | |
205 | ||
206 | if (array->dim[0].stride == 0) | |
207 | array->dim[0].stride = 1; | |
208 | ||
209 | if (mask->dim[0].stride == 0) | |
210 | mask->dim[0].stride = 1; | |
211 | ||
212 | dstride = retarray->dim[0].stride; | |
213 | dest = retarray->data; | |
214 | for (n = 0; n < rank; n++) | |
215 | { | |
216 | sstride[n] = array->dim[n].stride; | |
217 | mstride[n] = mask->dim[n].stride; | |
218 | extent[n] = array->dim[n].ubound + 1 - array->dim[n].lbound; | |
219 | count[n] = 0; | |
220 | if (extent[n] <= 0) | |
221 | { | |
222 | /* Set the return value. */ | |
223 | for (n = 0; n < rank; n++) | |
224 | dest[n * dstride] = 0; | |
225 | return; | |
226 | } | |
227 | } | |
228 | ||
229 | base = array->data; | |
230 | mbase = mask->data; | |
231 | ||
232 | if (GFC_DESCRIPTOR_SIZE (mask) != 4) | |
233 | { | |
234 | /* This allows the same loop to be used for all logical types. */ | |
235 | assert (GFC_DESCRIPTOR_SIZE (mask) == 8); | |
236 | for (n = 0; n < rank; n++) | |
237 | mstride[n] <<= 1; | |
238 | mbase = (GFOR_POINTER_L8_TO_L4 (mbase)); | |
239 | } | |
240 | ||
241 | ||
242 | /* Initialize the return value. */ | |
243 | for (n = 0; n < rank; n++) | |
244 | dest[n * dstride] = 1; | |
245 | { | |
246 | ||
247 | GFC_INTEGER_4 maxval; | |
248 | ||
249 | maxval = -GFC_INTEGER_4_HUGE; | |
250 | ||
251 | while (base) | |
252 | { | |
253 | { | |
254 | /* Implementation start. */ | |
255 | ||
256 | if (*mbase && *base > maxval) | |
257 | { | |
258 | maxval = *base; | |
259 | for (n = 0; n < rank; n++) | |
260 | dest[n * dstride] = count[n] + 1; | |
261 | } | |
262 | /* Implementation end. */ | |
263 | } | |
264 | /* Advance to the next element. */ | |
265 | count[0]++; | |
266 | base += sstride[0]; | |
267 | mbase += mstride[0]; | |
268 | n = 0; | |
269 | while (count[n] == extent[n]) | |
270 | { | |
271 | /* When we get to the end of a dimension, reset it and increment | |
272 | the next dimension. */ | |
273 | count[n] = 0; | |
274 | /* We could precalculate these products, but this is a less | |
275 | frequently used path so proabably not worth it. */ | |
276 | base -= sstride[n] * extent[n]; | |
277 | mbase -= mstride[n] * extent[n]; | |
278 | n++; | |
279 | if (n == rank) | |
280 | { | |
281 | /* Break out of the loop. */ | |
282 | base = NULL; | |
283 | break; | |
284 | } | |
285 | else | |
286 | { | |
287 | count[n]++; | |
288 | base += sstride[n]; | |
289 | mbase += mstride[n]; | |
290 | } | |
291 | } | |
292 | } | |
293 | } | |
294 | } | |
295 | ||
296 | #endif |