]>
git.ipfire.org Git - thirdparty/gcc.git/blob - libgfortran/generated/eoshift3_8.c
1 /* Implementation of the EOSHIFT intrinsic
2 Copyright 2002 Free Software Foundation, Inc.
3 Contributed by Paul Brook <paul@nowt.org>
5 This file is part of the GNU Fortran 95 runtime library (libgfortran).
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.
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
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.
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., 59 Temple Place - Suite 330,
29 Boston, MA 02111-1307, USA. */
35 #include "libgfortran.h"
37 static const char zeros
[16] =
38 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
40 extern void eoshift3_8 (gfc_array_char
*, gfc_array_char
*,
41 gfc_array_i8
*, const gfc_array_char
*,
43 export_proto(eoshift3_8
);
46 eoshift3_8 (gfc_array_char
*ret
, gfc_array_char
*array
,
47 gfc_array_i8
*h
, const gfc_array_char
*bound
,
48 GFC_INTEGER_8
*pwhich
)
50 /* r.* indicates the return array. */
51 index_type rstride
[GFC_MAX_DIMENSIONS
];
56 /* s.* indicates the source array. */
57 index_type sstride
[GFC_MAX_DIMENSIONS
];
62 /* h.* indicates the shift array. */
63 index_type hstride
[GFC_MAX_DIMENSIONS
];
65 const GFC_INTEGER_8
*hptr
;
66 /* b.* indicates the bound array. */
67 index_type bstride
[GFC_MAX_DIMENSIONS
];
71 index_type count
[GFC_MAX_DIMENSIONS
];
72 index_type extent
[GFC_MAX_DIMENSIONS
];
86 size
= GFC_DESCRIPTOR_SIZE (ret
);
90 size
= GFC_DESCRIPTOR_SIZE (array
);
92 for (dim
= 0; dim
< GFC_DESCRIPTOR_RANK (array
); dim
++)
96 roffset
= ret
->dim
[dim
].stride
* size
;
99 soffset
= array
->dim
[dim
].stride
* size
;
102 len
= array
->dim
[dim
].ubound
+ 1 - array
->dim
[dim
].lbound
;
107 extent
[n
] = array
->dim
[dim
].ubound
+ 1 - array
->dim
[dim
].lbound
;
108 rstride
[n
] = ret
->dim
[dim
].stride
* size
;
109 sstride
[n
] = array
->dim
[dim
].stride
* size
;
111 hstride
[n
] = h
->dim
[n
].stride
;
113 bstride
[n
] = bound
->dim
[n
].stride
;
125 if (bound
&& bstride
[0] == 0)
128 dim
= GFC_DESCRIPTOR_RANK (array
);
129 rstride0
= rstride
[0];
130 sstride0
= sstride
[0];
131 hstride0
= hstride
[0];
132 bstride0
= bstride
[0];
143 /* Do the shift for this dimension. */
145 delta
= (sh
>= 0) ? sh
: -sh
;
148 src
= &sptr
[delta
* soffset
];
154 dest
= &rptr
[delta
* roffset
];
156 for (n
= 0; n
< len
- delta
; n
++)
158 memcpy (dest
, src
, size
);
168 memcpy (dest
, bptr
, size
);
172 /* Advance to the next section. */
179 while (count
[n
] == extent
[n
])
181 /* When we get to the end of a dimension, reset it and increment
182 the next dimension. */
184 /* We could precalculate these products, but this is a less
185 frequently used path so proabably not worth it. */
186 rptr
-= rstride
[n
] * extent
[n
];
187 sptr
-= sstride
[n
] * extent
[n
];
188 hptr
-= hstride
[n
] * extent
[n
];
189 bptr
-= bstride
[n
] * extent
[n
];
193 /* Break out of the loop. */