OpenCores
URL https://opencores.org/ocsvn/scarts/scarts/trunk

Subversion Repositories scarts

[/] [scarts/] [trunk/] [toolchain/] [scarts-gcc/] [gcc-4.1.1/] [libgfortran/] [generated/] [eoshift3_4.c] - Blame information for rev 14

Details | Compare with Previous | View Log

Line No. Rev Author Line
1 14 jlechner
/* Implementation of the EOSHIFT intrinsic
2
   Copyright 2002, 2005 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 <string.h>
35
#include "libgfortran.h"
36
 
37
#if defined (HAVE_GFC_INTEGER_4)
38
 
39
static void
40
eoshift3 (gfc_array_char *ret, const gfc_array_char *array, const gfc_array_i4 *h,
41
          const gfc_array_char *bound, const GFC_INTEGER_4 *pwhich,
42
          index_type size, char filler)
43
{
44
  /* r.* indicates the return array.  */
45
  index_type rstride[GFC_MAX_DIMENSIONS];
46
  index_type rstride0;
47
  index_type roffset;
48
  char *rptr;
49
  char *dest;
50
  /* s.* indicates the source array.  */
51
  index_type sstride[GFC_MAX_DIMENSIONS];
52
  index_type sstride0;
53
  index_type soffset;
54
  const char *sptr;
55
  const char *src;
56
  /* h.* indicates the shift array.  */
57
  index_type hstride[GFC_MAX_DIMENSIONS];
58
  index_type hstride0;
59
  const GFC_INTEGER_4 *hptr;
60
  /* b.* indicates the bound array.  */
61
  index_type bstride[GFC_MAX_DIMENSIONS];
62
  index_type bstride0;
63
  const char *bptr;
64
 
65
  index_type count[GFC_MAX_DIMENSIONS];
66
  index_type extent[GFC_MAX_DIMENSIONS];
67
  index_type dim;
68
  index_type len;
69
  index_type n;
70
  int which;
71
  GFC_INTEGER_4 sh;
72
  GFC_INTEGER_4 delta;
73
 
74
  /* The compiler cannot figure out that these are set, initialize
75
     them to avoid warnings.  */
76
  len = 0;
77
  soffset = 0;
78
  roffset = 0;
79
 
80
  if (pwhich)
81
    which = *pwhich - 1;
82
  else
83
    which = 0;
84
 
85
  if (ret->data == NULL)
86
    {
87
      int i;
88
 
89
      ret->data = internal_malloc_size (size * size0 ((array_t *)array));
90
      ret->offset = 0;
91
      ret->dtype = array->dtype;
92
      for (i = 0; i < GFC_DESCRIPTOR_RANK (array); i++)
93
        {
94
          ret->dim[i].lbound = 0;
95
          ret->dim[i].ubound = array->dim[i].ubound - array->dim[i].lbound;
96
 
97
          if (i == 0)
98
            ret->dim[i].stride = 1;
99
          else
100
            ret->dim[i].stride = (ret->dim[i-1].ubound + 1) * ret->dim[i-1].stride;
101
        }
102
    }
103
 
104
 
105
  extent[0] = 1;
106
  count[0] = 0;
107
  n = 0;
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
          if (bound)
129
            bstride[n] = bound->dim[n].stride * size;
130
          else
131
            bstride[n] = 0;
132
          n++;
133
        }
134
    }
135
  if (sstride[0] == 0)
136
    sstride[0] = size;
137
  if (rstride[0] == 0)
138
    rstride[0] = size;
139
  if (hstride[0] == 0)
140
    hstride[0] = 1;
141
  if (bound && bstride[0] == 0)
142
    bstride[0] = size;
143
 
144
  dim = GFC_DESCRIPTOR_RANK (array);
145
  rstride0 = rstride[0];
146
  sstride0 = sstride[0];
147
  hstride0 = hstride[0];
148
  bstride0 = bstride[0];
149
  rptr = ret->data;
150
  sptr = array->data;
151
  hptr = h->data;
152
  if (bound)
153
    bptr = bound->data;
154
  else
155
    bptr = NULL;
156
 
157
  while (rptr)
158
    {
159
      /* Do the shift for this dimension.  */
160
      sh = *hptr;
161
      if (( sh >= 0 ? sh : -sh ) > len)
162
        {
163
          delta = len;
164
          sh = len;
165
        }
166
      else
167
        delta = (sh >= 0) ? sh: -sh;
168
 
169
      if (sh > 0)
170
        {
171
          src = &sptr[delta * soffset];
172
          dest = rptr;
173
        }
174
      else
175
        {
176
          src = sptr;
177
          dest = &rptr[delta * roffset];
178
        }
179
      for (n = 0; n < len - delta; n++)
180
        {
181
          memcpy (dest, src, size);
182
          dest += roffset;
183
          src += soffset;
184
        }
185
      if (sh < 0)
186
        dest = rptr;
187
      n = delta;
188
 
189
      if (bptr)
190
        while (n--)
191
          {
192
            memcpy (dest, bptr, size);
193
            dest += roffset;
194
          }
195
      else
196
        while (n--)
197
          {
198
            memset (dest, filler, size);
199
            dest += roffset;
200
          }
201
 
202
      /* Advance to the next section.  */
203
      rptr += rstride0;
204
      sptr += sstride0;
205
      hptr += hstride0;
206
      bptr += bstride0;
207
      count[0]++;
208
      n = 0;
209
      while (count[n] == extent[n])
210
        {
211
          /* When we get to the end of a dimension, reset it and increment
212
             the next dimension.  */
213
          count[n] = 0;
214
          /* We could precalculate these products, but this is a less
215
             frequently used path so proabably not worth it.  */
216
          rptr -= rstride[n] * extent[n];
217
          sptr -= sstride[n] * extent[n];
218
          hptr -= hstride[n] * extent[n];
219
          bptr -= bstride[n] * extent[n];
220
          n++;
221
          if (n >= dim - 1)
222
            {
223
              /* Break out of the loop.  */
224
              rptr = NULL;
225
              break;
226
            }
227
          else
228
            {
229
              count[n]++;
230
              rptr += rstride[n];
231
              sptr += sstride[n];
232
              hptr += hstride[n];
233
              bptr += bstride[n];
234
            }
235
        }
236
    }
237
}
238
 
239
extern void eoshift3_4 (gfc_array_char *, const gfc_array_char *,
240
                                   const gfc_array_i4 *, const gfc_array_char *,
241
                                   const GFC_INTEGER_4 *);
242
export_proto(eoshift3_4);
243
 
244
void
245
eoshift3_4 (gfc_array_char *ret, const gfc_array_char *array,
246
                       const gfc_array_i4 *h, const gfc_array_char *bound,
247
                       const GFC_INTEGER_4 *pwhich)
248
{
249
  eoshift3 (ret, array, h, bound, pwhich, GFC_DESCRIPTOR_SIZE (array), 0);
250
}
251
 
252
extern void eoshift3_4_char (gfc_array_char *, GFC_INTEGER_4,
253
                                          const gfc_array_char *,
254
                                          const gfc_array_i4 *,
255
                                          const gfc_array_char *,
256
                                          const GFC_INTEGER_4 *, GFC_INTEGER_4,
257
                                          GFC_INTEGER_4);
258
export_proto(eoshift3_4_char);
259
 
260
void
261
eoshift3_4_char (gfc_array_char *ret,
262
                              GFC_INTEGER_4 ret_length __attribute__((unused)),
263
                              const gfc_array_char *array, const gfc_array_i4 *h,
264
                              const gfc_array_char *bound,
265
                              const GFC_INTEGER_4 *pwhich,
266
                              GFC_INTEGER_4 array_length,
267
                              GFC_INTEGER_4 bound_length
268
                                __attribute__((unused)))
269
{
270
  eoshift3 (ret, array, h, bound, pwhich, array_length, ' ');
271
}
272
 
273
#endif

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.