1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
|
/* Implementation of the EOSHIFT intrinsic
Copyright 2002, 2005 Free Software Foundation, Inc.
Contributed by Paul Brook <paul@nowt.org>
This file is part of the GNU Fortran 95 runtime library (libgfortran).
Libgfortran is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
In addition to the permissions in the GNU General Public License, the
Free Software Foundation gives you unlimited permission to link the
compiled version of this file into combinations with other programs,
and to distribute those combinations without any restriction coming
from the use of this file. (The General Public License restrictions
do apply in other respects; for example, they cover modification of
the file, and distribution when not linked into a combine
executable.)
Libgfortran is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public
License along with libgfortran; see the file COPYING. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include "config.h"
#include <stdlib.h>
#include <assert.h>
#include <string.h>
#include "libgfortran.h"
static const char zeros[16] =
{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
extern void eoshift1_4 (gfc_array_char *,
const gfc_array_char *,
const gfc_array_i4 *, const char *,
const GFC_INTEGER_4 *);
export_proto(eoshift1_4);
void
eoshift1_4 (gfc_array_char *ret,
const gfc_array_char *array,
const gfc_array_i4 *h, const char *pbound,
const GFC_INTEGER_4 *pwhich)
{
/* r.* indicates the return array. */
index_type rstride[GFC_MAX_DIMENSIONS];
index_type rstride0;
index_type roffset;
char *rptr;
char *dest;
/* s.* indicates the source array. */
index_type sstride[GFC_MAX_DIMENSIONS];
index_type sstride0;
index_type soffset;
const char *sptr;
const char *src;
/* h.* indicates the shift array. */
index_type hstride[GFC_MAX_DIMENSIONS];
index_type hstride0;
const GFC_INTEGER_4 *hptr;
index_type count[GFC_MAX_DIMENSIONS];
index_type extent[GFC_MAX_DIMENSIONS];
index_type dim;
index_type size;
index_type len;
index_type n;
int which;
GFC_INTEGER_4 sh;
GFC_INTEGER_4 delta;
/* The compiler cannot figure out that these are set, initialize
them to avoid warnings. */
len = 0;
soffset = 0;
roffset = 0;
if (pwhich)
which = *pwhich - 1;
else
which = 0;
if (!pbound)
pbound = zeros;
size = GFC_DESCRIPTOR_SIZE (ret);
extent[0] = 1;
count[0] = 0;
size = GFC_DESCRIPTOR_SIZE (array);
if (ret->data == NULL)
{
int i;
ret->data = internal_malloc_size (size * size0 ((array_t *)array));
ret->base = 0;
ret->dtype = array->dtype;
for (i = 0; i < GFC_DESCRIPTOR_RANK (array); i++)
{
ret->dim[i].lbound = 0;
ret->dim[i].ubound = array->dim[i].ubound - array->dim[i].lbound;
if (i == 0)
ret->dim[i].stride = 1;
else
ret->dim[i].stride = (ret->dim[i-1].ubound + 1) * ret->dim[i-1].stride;
}
}
n = 0;
for (dim = 0; dim < GFC_DESCRIPTOR_RANK (array); dim++)
{
if (dim == which)
{
roffset = ret->dim[dim].stride * size;
if (roffset == 0)
roffset = size;
soffset = array->dim[dim].stride * size;
if (soffset == 0)
soffset = size;
len = array->dim[dim].ubound + 1 - array->dim[dim].lbound;
}
else
{
count[n] = 0;
extent[n] = array->dim[dim].ubound + 1 - array->dim[dim].lbound;
rstride[n] = ret->dim[dim].stride * size;
sstride[n] = array->dim[dim].stride * size;
hstride[n] = h->dim[n].stride * size;
n++;
}
}
if (sstride[0] == 0)
sstride[0] = size;
if (rstride[0] == 0)
rstride[0] = size;
if (hstride[0] == 0)
hstride[0] = 1;
dim = GFC_DESCRIPTOR_RANK (array);
rstride0 = rstride[0];
sstride0 = sstride[0];
hstride0 = hstride[0];
rptr = ret->data;
sptr = array->data;
hptr = h->data;
while (rptr)
{
/* Do the shift for this dimension. */
sh = *hptr;
if (( sh >= 0 ? sh : -sh ) > len)
{
delta = len;
sh = len;
}
else
delta = (sh >= 0) ? sh: -sh;
if (sh > 0)
{
src = &sptr[delta * soffset];
dest = rptr;
}
else
{
src = sptr;
dest = &rptr[delta * roffset];
}
for (n = 0; n < len - delta; n++)
{
memcpy (dest, src, size);
dest += roffset;
src += soffset;
}
if (sh < 0)
dest = rptr;
n = delta;
while (n--)
{
memcpy (dest, pbound, size);
dest += roffset;
}
/* Advance to the next section. */
rptr += rstride0;
sptr += sstride0;
hptr += hstride0;
count[0]++;
n = 0;
while (count[n] == extent[n])
{
/* When we get to the end of a dimension, reset it and increment
the next dimension. */
count[n] = 0;
/* We could precalculate these products, but this is a less
frequently used path so proabably not worth it. */
rptr -= rstride[n] * extent[n];
sptr -= sstride[n] * extent[n];
hptr -= hstride[n] * extent[n];
n++;
if (n >= dim - 1)
{
/* Break out of the loop. */
rptr = NULL;
break;
}
else
{
count[n]++;
rptr += rstride[n];
sptr += sstride[n];
hptr += hstride[n];
}
}
}
}
|
