]>
Commit | Line | Data |
---|---|---|
6de9cd9a | 1 | /* Implementation of the CSHIFT intrinsic |
748086b7 | 2 | Copyright 2003, 2007, 2009 Free Software Foundation, Inc. |
6de9cd9a DN |
3 | Contributed by Feng Wang <wf_cs@yahoo.com> |
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 | |
57dea9f6 | 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 | Ligbfortran 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 | cshift1 (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_INTEGER_4 * const restrict pwhich, | |
39 | index_type size) | |
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; | |
46 | char *dest; | |
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; | |
80ee04b9 | 53 | /* h.* indicates the shift array. */ |
e33e218b | 54 | index_type hstride[GFC_MAX_DIMENSIONS]; |
6de9cd9a DN |
55 | index_type hstride0; |
56 | const GFC_INTEGER_4 *hptr; | |
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; | |
63 | int which; | |
64 | GFC_INTEGER_4 sh; | |
c44109aa | 65 | index_type arraysize; |
6de9cd9a DN |
66 | |
67 | if (pwhich) | |
68 | which = *pwhich - 1; | |
69 | else | |
70 | which = 0; | |
71 | ||
72 | if (which < 0 || (which + 1) > GFC_DESCRIPTOR_RANK (array)) | |
73 | runtime_error ("Argument 'DIM' is out of range in call to 'CSHIFT'"); | |
74 | ||
c44109aa TK |
75 | arraysize = size0 ((array_t *)array); |
76 | ||
0e6d033b TK |
77 | if (ret->data == NULL) |
78 | { | |
79 | int i; | |
80 | ||
c44109aa | 81 | ret->data = internal_malloc_size (size * arraysize); |
efd4dc1a | 82 | ret->offset = 0; |
0e6d033b TK |
83 | ret->dtype = array->dtype; |
84 | for (i = 0; i < GFC_DESCRIPTOR_RANK (array); i++) | |
85 | { | |
86 | ret->dim[i].lbound = 0; | |
87 | ret->dim[i].ubound = array->dim[i].ubound - array->dim[i].lbound; | |
88 | ||
89 | if (i == 0) | |
90 | ret->dim[i].stride = 1; | |
91 | else | |
92 | ret->dim[i].stride = (ret->dim[i-1].ubound + 1) * ret->dim[i-1].stride; | |
93 | } | |
94 | } | |
95 | ||
c44109aa TK |
96 | if (arraysize == 0) |
97 | return; | |
98 | ||
6de9cd9a DN |
99 | extent[0] = 1; |
100 | count[0] = 0; | |
6de9cd9a DN |
101 | n = 0; |
102 | ||
7d7b8bfe | 103 | /* Initialized for avoiding compiler warnings. */ |
6de9cd9a DN |
104 | roffset = size; |
105 | soffset = size; | |
106 | len = 0; | |
107 | ||
108 | for (dim = 0; dim < GFC_DESCRIPTOR_RANK (array); dim++) | |
109 | { | |
110 | if (dim == which) | |
111 | { | |
112 | roffset = ret->dim[dim].stride * size; | |
113 | if (roffset == 0) | |
114 | roffset = size; | |
115 | soffset = array->dim[dim].stride * size; | |
116 | if (soffset == 0) | |
117 | soffset = size; | |
118 | len = array->dim[dim].ubound + 1 - array->dim[dim].lbound; | |
119 | } | |
120 | else | |
121 | { | |
122 | count[n] = 0; | |
123 | extent[n] = array->dim[dim].ubound + 1 - array->dim[dim].lbound; | |
124 | rstride[n] = ret->dim[dim].stride * size; | |
125 | sstride[n] = array->dim[dim].stride * size; | |
126 | ||
127 | hstride[n] = h->dim[n].stride; | |
128 | n++; | |
129 | } | |
130 | } | |
131 | if (sstride[0] == 0) | |
132 | sstride[0] = size; | |
133 | if (rstride[0] == 0) | |
134 | rstride[0] = size; | |
135 | if (hstride[0] == 0) | |
136 | hstride[0] = 1; | |
137 | ||
138 | dim = GFC_DESCRIPTOR_RANK (array); | |
139 | rstride0 = rstride[0]; | |
140 | sstride0 = sstride[0]; | |
141 | hstride0 = hstride[0]; | |
142 | rptr = ret->data; | |
143 | sptr = array->data; | |
144 | hptr = h->data; | |
145 | ||
146 | while (rptr) | |
147 | { | |
80ee04b9 | 148 | /* Do the shift for this dimension. */ |
6de9cd9a DN |
149 | sh = *hptr; |
150 | sh = (div (sh, len)).rem; | |
151 | if (sh < 0) | |
152 | sh += len; | |
153 | ||
154 | src = &sptr[sh * soffset]; | |
155 | dest = rptr; | |
156 | ||
157 | for (n = 0; n < len; n++) | |
158 | { | |
159 | memcpy (dest, src, size); | |
160 | dest += roffset; | |
161 | if (n == len - sh - 1) | |
162 | src = sptr; | |
163 | else | |
164 | src += soffset; | |
165 | } | |
166 | ||
167 | /* Advance to the next section. */ | |
168 | rptr += rstride0; | |
169 | sptr += sstride0; | |
170 | hptr += hstride0; | |
171 | count[0]++; | |
172 | n = 0; | |
173 | while (count[n] == extent[n]) | |
174 | { | |
175 | /* When we get to the end of a dimension, reset it and increment | |
176 | the next dimension. */ | |
177 | count[n] = 0; | |
178 | /* We could precalculate these products, but this is a less | |
5d7adf7a | 179 | frequently used path so probably not worth it. */ |
6de9cd9a DN |
180 | rptr -= rstride[n] * extent[n]; |
181 | sptr -= sstride[n] * extent[n]; | |
182 | hptr -= hstride[n] * extent[n]; | |
183 | n++; | |
184 | if (n >= dim - 1) | |
185 | { | |
186 | /* Break out of the loop. */ | |
187 | rptr = NULL; | |
188 | break; | |
189 | } | |
190 | else | |
191 | { | |
192 | count[n]++; | |
193 | rptr += rstride[n]; | |
194 | sptr += sstride[n]; | |
195 | hptr += hstride[n]; | |
196 | } | |
197 | } | |
198 | } | |
199 | } | |
7823229b | 200 | |
64acfd99 JB |
201 | void cshift1_4 (gfc_array_char * const restrict, |
202 | const gfc_array_char * const restrict, | |
203 | const gfc_array_i4 * const restrict, | |
204 | const GFC_INTEGER_4 * const restrict); | |
7823229b RS |
205 | export_proto(cshift1_4); |
206 | ||
207 | void | |
64acfd99 JB |
208 | cshift1_4 (gfc_array_char * const restrict ret, |
209 | const gfc_array_char * const restrict array, | |
210 | const gfc_array_i4 * const restrict h, | |
211 | const GFC_INTEGER_4 * const restrict pwhich) | |
7823229b RS |
212 | { |
213 | cshift1 (ret, array, h, pwhich, GFC_DESCRIPTOR_SIZE (array)); | |
214 | } | |
215 | ||
691da334 | 216 | |
64acfd99 JB |
217 | void cshift1_4_char (gfc_array_char * const restrict ret, |
218 | GFC_INTEGER_4, | |
219 | const gfc_array_char * const restrict array, | |
220 | const gfc_array_i4 * const restrict h, | |
221 | const GFC_INTEGER_4 * const restrict pwhich, | |
222 | GFC_INTEGER_4); | |
7823229b RS |
223 | export_proto(cshift1_4_char); |
224 | ||
225 | void | |
64acfd99 JB |
226 | cshift1_4_char (gfc_array_char * const restrict ret, |
227 | GFC_INTEGER_4 ret_length __attribute__((unused)), | |
228 | const gfc_array_char * const restrict array, | |
229 | const gfc_array_i4 * const restrict h, | |
230 | const GFC_INTEGER_4 * const restrict pwhich, | |
231 | GFC_INTEGER_4 array_length) | |
7823229b RS |
232 | { |
233 | cshift1 (ret, array, h, pwhich, array_length); | |
234 | } | |
644cb69f | 235 | |
691da334 FXC |
236 | |
237 | void cshift1_4_char4 (gfc_array_char * const restrict ret, | |
238 | GFC_INTEGER_4, | |
239 | const gfc_array_char * const restrict array, | |
240 | const gfc_array_i4 * const restrict h, | |
241 | const GFC_INTEGER_4 * const restrict pwhich, | |
242 | GFC_INTEGER_4); | |
243 | export_proto(cshift1_4_char4); | |
244 | ||
245 | void | |
246 | cshift1_4_char4 (gfc_array_char * const restrict ret, | |
247 | GFC_INTEGER_4 ret_length __attribute__((unused)), | |
248 | const gfc_array_char * const restrict array, | |
249 | const gfc_array_i4 * const restrict h, | |
250 | const GFC_INTEGER_4 * const restrict pwhich, | |
251 | GFC_INTEGER_4 array_length) | |
252 | { | |
253 | cshift1 (ret, array, h, pwhich, array_length * sizeof (gfc_char4_t)); | |
254 | } | |
255 | ||
644cb69f | 256 | #endif |