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75f2543f | 1 | /* Special implementation of the SPREAD intrinsic |
f0bcf628 | 2 | Copyright (C) 2008-2014 Free Software Foundation, Inc. |
75f2543f TK |
3 | Contributed by Thomas Koenig <tkoenig@gcc.gnu.org>, based on |
4 | spread_generic.c written by Paul Brook <paul@nowt.org> | |
5 | ||
21d1335b | 6 | This file is part of the GNU Fortran runtime library (libgfortran). |
75f2543f TK |
7 | |
8 | Libgfortran is free software; you can redistribute it and/or | |
9 | modify it under the terms of the GNU General Public | |
10 | License as published by the Free Software Foundation; either | |
748086b7 | 11 | version 3 of the License, or (at your option) any later version. |
75f2543f TK |
12 | |
13 | Ligbfortran is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
748086b7 JJ |
18 | Under Section 7 of GPL version 3, you are granted additional |
19 | permissions described in the GCC Runtime Library Exception, version | |
20 | 3.1, as published by the Free Software Foundation. | |
21 | ||
22 | You should have received a copy of the GNU General Public License and | |
23 | a copy of the GCC Runtime Library Exception along with this program; | |
24 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
25 | <http://www.gnu.org/licenses/>. */ | |
75f2543f TK |
26 | |
27 | #include "libgfortran.h" | |
28 | #include <stdlib.h> | |
29 | #include <assert.h> | |
30 | #include <string.h> | |
31 | ||
32 | ||
33 | #if defined (HAVE_GFC_REAL_16) | |
34 | ||
35 | void | |
36 | spread_r16 (gfc_array_r16 *ret, const gfc_array_r16 *source, | |
37 | const index_type along, const index_type pncopies) | |
38 | { | |
39 | /* r.* indicates the return array. */ | |
40 | index_type rstride[GFC_MAX_DIMENSIONS]; | |
41 | index_type rstride0; | |
42 | index_type rdelta = 0; | |
43 | index_type rrank; | |
44 | index_type rs; | |
45 | GFC_REAL_16 *rptr; | |
5863aacf | 46 | GFC_REAL_16 * restrict dest; |
75f2543f TK |
47 | /* s.* indicates the source array. */ |
48 | index_type sstride[GFC_MAX_DIMENSIONS]; | |
49 | index_type sstride0; | |
50 | index_type srank; | |
51 | const GFC_REAL_16 *sptr; | |
52 | ||
53 | index_type count[GFC_MAX_DIMENSIONS]; | |
54 | index_type extent[GFC_MAX_DIMENSIONS]; | |
55 | index_type n; | |
56 | index_type dim; | |
57 | index_type ncopies; | |
58 | ||
59 | srank = GFC_DESCRIPTOR_RANK(source); | |
60 | ||
61 | rrank = srank + 1; | |
62 | if (rrank > GFC_MAX_DIMENSIONS) | |
63 | runtime_error ("return rank too large in spread()"); | |
64 | ||
65 | if (along > rrank) | |
66 | runtime_error ("dim outside of rank in spread()"); | |
67 | ||
68 | ncopies = pncopies; | |
69 | ||
21d1335b | 70 | if (ret->base_addr == NULL) |
75f2543f | 71 | { |
dfb55fdc TK |
72 | |
73 | size_t ub, stride; | |
74 | ||
75f2543f TK |
75 | /* The front end has signalled that we need to populate the |
76 | return array descriptor. */ | |
77 | ret->dtype = (source->dtype & ~GFC_DTYPE_RANK_MASK) | rrank; | |
78 | dim = 0; | |
79 | rs = 1; | |
80 | for (n = 0; n < rrank; n++) | |
81 | { | |
dfb55fdc | 82 | stride = rs; |
75f2543f TK |
83 | if (n == along - 1) |
84 | { | |
dfb55fdc | 85 | ub = ncopies - 1; |
75f2543f TK |
86 | rdelta = rs; |
87 | rs *= ncopies; | |
88 | } | |
89 | else | |
90 | { | |
91 | count[dim] = 0; | |
dfb55fdc TK |
92 | extent[dim] = GFC_DESCRIPTOR_EXTENT(source,dim); |
93 | sstride[dim] = GFC_DESCRIPTOR_STRIDE(source,dim); | |
75f2543f TK |
94 | rstride[dim] = rs; |
95 | ||
dfb55fdc | 96 | ub = extent[dim] - 1; |
75f2543f TK |
97 | rs *= extent[dim]; |
98 | dim++; | |
99 | } | |
dfb55fdc | 100 | GFC_DIMENSION_SET(ret->dim[n], 0, ub, stride); |
75f2543f TK |
101 | } |
102 | ret->offset = 0; | |
a787f6f9 | 103 | |
92e6f3a4 JB |
104 | /* xmallocarray allocates a single byte for zero size. */ |
105 | ret->base_addr = xmallocarray (rs, sizeof(GFC_REAL_16)); | |
a787f6f9 TK |
106 | if (rs <= 0) |
107 | return; | |
75f2543f TK |
108 | } |
109 | else | |
110 | { | |
111 | int zero_sized; | |
112 | ||
113 | zero_sized = 0; | |
114 | ||
115 | dim = 0; | |
116 | if (GFC_DESCRIPTOR_RANK(ret) != rrank) | |
117 | runtime_error ("rank mismatch in spread()"); | |
118 | ||
9731c4a3 | 119 | if (unlikely (compile_options.bounds_check)) |
75f2543f TK |
120 | { |
121 | for (n = 0; n < rrank; n++) | |
122 | { | |
123 | index_type ret_extent; | |
124 | ||
dfb55fdc | 125 | ret_extent = GFC_DESCRIPTOR_EXTENT(ret,n); |
75f2543f TK |
126 | if (n == along - 1) |
127 | { | |
dfb55fdc | 128 | rdelta = GFC_DESCRIPTOR_STRIDE(ret,n); |
75f2543f TK |
129 | |
130 | if (ret_extent != ncopies) | |
131 | runtime_error("Incorrect extent in return value of SPREAD" | |
132 | " intrinsic in dimension %ld: is %ld," | |
133 | " should be %ld", (long int) n+1, | |
134 | (long int) ret_extent, (long int) ncopies); | |
135 | } | |
136 | else | |
137 | { | |
138 | count[dim] = 0; | |
dfb55fdc | 139 | extent[dim] = GFC_DESCRIPTOR_EXTENT(source,dim); |
75f2543f TK |
140 | if (ret_extent != extent[dim]) |
141 | runtime_error("Incorrect extent in return value of SPREAD" | |
142 | " intrinsic in dimension %ld: is %ld," | |
143 | " should be %ld", (long int) n+1, | |
144 | (long int) ret_extent, | |
145 | (long int) extent[dim]); | |
146 | ||
147 | if (extent[dim] <= 0) | |
148 | zero_sized = 1; | |
dfb55fdc TK |
149 | sstride[dim] = GFC_DESCRIPTOR_STRIDE(source,dim); |
150 | rstride[dim] = GFC_DESCRIPTOR_STRIDE(ret,n); | |
75f2543f TK |
151 | dim++; |
152 | } | |
153 | } | |
154 | } | |
155 | else | |
156 | { | |
157 | for (n = 0; n < rrank; n++) | |
158 | { | |
159 | if (n == along - 1) | |
160 | { | |
dfb55fdc | 161 | rdelta = GFC_DESCRIPTOR_STRIDE(ret,n); |
75f2543f TK |
162 | } |
163 | else | |
164 | { | |
165 | count[dim] = 0; | |
dfb55fdc | 166 | extent[dim] = GFC_DESCRIPTOR_EXTENT(source,dim); |
75f2543f TK |
167 | if (extent[dim] <= 0) |
168 | zero_sized = 1; | |
dfb55fdc TK |
169 | sstride[dim] = GFC_DESCRIPTOR_STRIDE(source,dim); |
170 | rstride[dim] = GFC_DESCRIPTOR_STRIDE(ret,n); | |
75f2543f TK |
171 | dim++; |
172 | } | |
173 | } | |
174 | } | |
175 | ||
176 | if (zero_sized) | |
177 | return; | |
178 | ||
179 | if (sstride[0] == 0) | |
180 | sstride[0] = 1; | |
181 | } | |
182 | sstride0 = sstride[0]; | |
183 | rstride0 = rstride[0]; | |
21d1335b TB |
184 | rptr = ret->base_addr; |
185 | sptr = source->base_addr; | |
75f2543f TK |
186 | |
187 | while (sptr) | |
188 | { | |
189 | /* Spread this element. */ | |
190 | dest = rptr; | |
191 | for (n = 0; n < ncopies; n++) | |
192 | { | |
193 | *dest = *sptr; | |
194 | dest += rdelta; | |
195 | } | |
196 | /* Advance to the next element. */ | |
197 | sptr += sstride0; | |
198 | rptr += rstride0; | |
199 | count[0]++; | |
200 | n = 0; | |
201 | while (count[n] == extent[n]) | |
202 | { | |
203 | /* When we get to the end of a dimension, reset it and increment | |
204 | the next dimension. */ | |
205 | count[n] = 0; | |
206 | /* We could precalculate these products, but this is a less | |
207 | frequently used path so probably not worth it. */ | |
208 | sptr -= sstride[n] * extent[n]; | |
209 | rptr -= rstride[n] * extent[n]; | |
210 | n++; | |
211 | if (n >= srank) | |
212 | { | |
213 | /* Break out of the loop. */ | |
214 | sptr = NULL; | |
215 | break; | |
216 | } | |
217 | else | |
218 | { | |
219 | count[n]++; | |
220 | sptr += sstride[n]; | |
221 | rptr += rstride[n]; | |
222 | } | |
223 | } | |
224 | } | |
225 | } | |
226 | ||
227 | /* This version of spread_internal treats the special case of a scalar | |
228 | source. This is much simpler than the more general case above. */ | |
229 | ||
230 | void | |
231 | spread_scalar_r16 (gfc_array_r16 *ret, const GFC_REAL_16 *source, | |
232 | const index_type along, const index_type pncopies) | |
233 | { | |
234 | int n; | |
235 | int ncopies = pncopies; | |
5863aacf | 236 | GFC_REAL_16 * restrict dest; |
75f2543f TK |
237 | index_type stride; |
238 | ||
239 | if (GFC_DESCRIPTOR_RANK (ret) != 1) | |
240 | runtime_error ("incorrect destination rank in spread()"); | |
241 | ||
242 | if (along > 1) | |
243 | runtime_error ("dim outside of rank in spread()"); | |
244 | ||
21d1335b | 245 | if (ret->base_addr == NULL) |
75f2543f | 246 | { |
92e6f3a4 | 247 | ret->base_addr = xmallocarray (ncopies, sizeof (GFC_REAL_16)); |
75f2543f | 248 | ret->offset = 0; |
dfb55fdc | 249 | GFC_DIMENSION_SET(ret->dim[0], 0, ncopies - 1, 1); |
75f2543f TK |
250 | } |
251 | else | |
252 | { | |
dfb55fdc TK |
253 | if (ncopies - 1 > (GFC_DESCRIPTOR_EXTENT(ret,0) - 1) |
254 | / GFC_DESCRIPTOR_STRIDE(ret,0)) | |
75f2543f TK |
255 | runtime_error ("dim too large in spread()"); |
256 | } | |
257 | ||
21d1335b | 258 | dest = ret->base_addr; |
dfb55fdc | 259 | stride = GFC_DESCRIPTOR_STRIDE(ret,0); |
75f2543f TK |
260 | |
261 | for (n = 0; n < ncopies; n++) | |
262 | { | |
263 | *dest = *source; | |
264 | dest += stride; | |
265 | } | |
266 | } | |
267 | ||
268 | #endif | |
5863aacf | 269 |