1 /* Implementation of the CSHIFT intrinsic
2 Copyright 2003, 2007, 2009 Free Software Foundation, Inc.
3 Contributed by Feng Wang <wf_cs@yahoo.com>
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 3 of the License, or (at your option) any later version.
12 Ligbfortran is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
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.
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/>. */
26 #include "libgfortran.h"
32 #if defined (HAVE_GFC_INTEGER_8)
35 cshift1 (gfc_array_char
* const restrict ret
,
36 const gfc_array_char
* const restrict array
,
37 const gfc_array_i8
* const restrict h
,
38 const GFC_INTEGER_8
* const restrict pwhich
)
40 /* r.* indicates the return array. */
41 index_type rstride
[GFC_MAX_DIMENSIONS
];
46 /* s.* indicates the source array. */
47 index_type sstride
[GFC_MAX_DIMENSIONS
];
52 /* h.* indicates the shift array. */
53 index_type hstride
[GFC_MAX_DIMENSIONS
];
55 const GFC_INTEGER_8
*hptr
;
57 index_type count
[GFC_MAX_DIMENSIONS
];
58 index_type extent
[GFC_MAX_DIMENSIONS
];
72 if (which
< 0 || (which
+ 1) > GFC_DESCRIPTOR_RANK (array
))
73 runtime_error ("Argument 'DIM' is out of range in call to 'CSHIFT'");
75 size
= GFC_DESCRIPTOR_SIZE(array
);
77 arraysize
= size0 ((array_t
*)array
);
79 if (ret
->data
== NULL
)
83 ret
->data
= internal_malloc_size (size
* arraysize
);
85 ret
->dtype
= array
->dtype
;
86 for (i
= 0; i
< GFC_DESCRIPTOR_RANK (array
); i
++)
90 ub
= GFC_DESCRIPTOR_EXTENT(array
,i
) - 1;
95 str
= GFC_DESCRIPTOR_EXTENT(ret
,i
-1) *
96 GFC_DESCRIPTOR_STRIDE(ret
,i
-1);
98 GFC_DIMENSION_SET(ret
->dim
[i
], 0, ub
, str
);
109 /* Initialized for avoiding compiler warnings. */
114 for (dim
= 0; dim
< GFC_DESCRIPTOR_RANK (array
); dim
++)
118 roffset
= GFC_DESCRIPTOR_STRIDE_BYTES(ret
,dim
);
121 soffset
= GFC_DESCRIPTOR_STRIDE_BYTES(array
,dim
);
124 len
= GFC_DESCRIPTOR_EXTENT(array
,dim
);
129 extent
[n
] = GFC_DESCRIPTOR_EXTENT(array
,dim
);
130 rstride
[n
] = GFC_DESCRIPTOR_STRIDE_BYTES(ret
,dim
);
131 sstride
[n
] = GFC_DESCRIPTOR_STRIDE_BYTES(array
,dim
);
133 hstride
[n
] = GFC_DESCRIPTOR_STRIDE(h
,n
);
144 dim
= GFC_DESCRIPTOR_RANK (array
);
145 rstride0
= rstride
[0];
146 sstride0
= sstride
[0];
147 hstride0
= hstride
[0];
154 /* Do the shift for this dimension. */
156 sh
= (div (sh
, len
)).rem
;
160 src
= &sptr
[sh
* soffset
];
163 for (n
= 0; n
< len
; n
++)
165 memcpy (dest
, src
, size
);
167 if (n
== len
- sh
- 1)
173 /* 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 probably not worth it. */
186 rptr
-= rstride
[n
] * extent
[n
];
187 sptr
-= sstride
[n
] * extent
[n
];
188 hptr
-= hstride
[n
] * extent
[n
];
192 /* Break out of the loop. */
207 void cshift1_8 (gfc_array_char
* const restrict
,
208 const gfc_array_char
* const restrict
,
209 const gfc_array_i8
* const restrict
,
210 const GFC_INTEGER_8
* const restrict
);
211 export_proto(cshift1_8
);
214 cshift1_8 (gfc_array_char
* const restrict ret
,
215 const gfc_array_char
* const restrict array
,
216 const gfc_array_i8
* const restrict h
,
217 const GFC_INTEGER_8
* const restrict pwhich
)
219 cshift1 (ret
, array
, h
, pwhich
);
223 void cshift1_8_char (gfc_array_char
* const restrict ret
,
225 const gfc_array_char
* const restrict array
,
226 const gfc_array_i8
* const restrict h
,
227 const GFC_INTEGER_8
* const restrict pwhich
,
229 export_proto(cshift1_8_char
);
232 cshift1_8_char (gfc_array_char
* const restrict ret
,
233 GFC_INTEGER_4 ret_length
__attribute__((unused
)),
234 const gfc_array_char
* const restrict array
,
235 const gfc_array_i8
* const restrict h
,
236 const GFC_INTEGER_8
* const restrict pwhich
,
237 GFC_INTEGER_4 array_length
__attribute__((unused
)))
239 cshift1 (ret
, array
, h
, pwhich
);
243 void cshift1_8_char4 (gfc_array_char
* const restrict ret
,
245 const gfc_array_char
* const restrict array
,
246 const gfc_array_i8
* const restrict h
,
247 const GFC_INTEGER_8
* const restrict pwhich
,
249 export_proto(cshift1_8_char4
);
252 cshift1_8_char4 (gfc_array_char
* const restrict ret
,
253 GFC_INTEGER_4 ret_length
__attribute__((unused
)),
254 const gfc_array_char
* const restrict array
,
255 const gfc_array_i8
* const restrict h
,
256 const GFC_INTEGER_8
* const restrict pwhich
,
257 GFC_INTEGER_4 array_length
__attribute__((unused
)))
259 cshift1 (ret
, array
, h
, pwhich
);