1 /* Implementation of the CSHIFT intrinsic
2 Copyright (C) 2003-2023 Free Software Foundation, Inc.
3 Contributed by Feng Wang <wf_cs@yahoo.com>
5 This file is part of the GNU Fortran 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"
30 #if defined (HAVE_GFC_INTEGER_8)
33 cshift1 (gfc_array_char
* const restrict ret
,
34 const gfc_array_char
* const restrict array
,
35 const gfc_array_i8
* const restrict h
,
36 const GFC_INTEGER_8
* const restrict pwhich
)
38 /* r.* indicates the return array. */
39 index_type rstride
[GFC_MAX_DIMENSIONS
];
44 /* s.* indicates the source array. */
45 index_type sstride
[GFC_MAX_DIMENSIONS
];
50 /* h.* indicates the shift array. */
51 index_type hstride
[GFC_MAX_DIMENSIONS
];
53 const GFC_INTEGER_8
*hptr
;
55 index_type count
[GFC_MAX_DIMENSIONS
];
56 index_type extent
[GFC_MAX_DIMENSIONS
];
71 if (which
< 0 || (which
+ 1) > GFC_DESCRIPTOR_RANK (array
))
72 runtime_error ("Argument 'DIM' is out of range in call to 'CSHIFT'");
74 size
= GFC_DESCRIPTOR_SIZE(array
);
76 arraysize
= size0 ((array_t
*)array
);
78 if (ret
->base_addr
== NULL
)
80 ret
->base_addr
= xmallocarray (arraysize
, size
);
82 GFC_DTYPE_COPY(ret
,array
);
83 for (index_type i
= 0; i
< GFC_DESCRIPTOR_RANK (array
); i
++)
87 ub
= GFC_DESCRIPTOR_EXTENT(array
,i
) - 1;
92 str
= GFC_DESCRIPTOR_EXTENT(ret
,i
-1) *
93 GFC_DESCRIPTOR_STRIDE(ret
,i
-1);
95 GFC_DIMENSION_SET(ret
->dim
[i
], 0, ub
, str
);
98 else if (unlikely (compile_options
.bounds_check
))
100 bounds_equal_extents ((array_t
*) ret
, (array_t
*) array
,
101 "return value", "CSHIFT");
104 if (unlikely (compile_options
.bounds_check
))
106 bounds_reduced_extents ((array_t
*) h
, (array_t
*) array
, which
,
107 "SHIFT argument", "CSHIFT");
113 /* See if we should dispatch to a helper function. */
115 type_size
= GFC_DTYPE_TYPE_SIZE (array
);
119 case GFC_DTYPE_LOGICAL_1
:
120 case GFC_DTYPE_INTEGER_1
:
121 cshift1_8_i1 ((gfc_array_i1
*)ret
, (gfc_array_i1
*) array
,
125 case GFC_DTYPE_LOGICAL_2
:
126 case GFC_DTYPE_INTEGER_2
:
127 cshift1_8_i2 ((gfc_array_i2
*)ret
, (gfc_array_i2
*) array
,
131 case GFC_DTYPE_LOGICAL_4
:
132 case GFC_DTYPE_INTEGER_4
:
133 cshift1_8_i4 ((gfc_array_i4
*)ret
, (gfc_array_i4
*) array
,
137 case GFC_DTYPE_LOGICAL_8
:
138 case GFC_DTYPE_INTEGER_8
:
139 cshift1_8_i8 ((gfc_array_i8
*)ret
, (gfc_array_i8
*) array
,
143 #if defined (HAVE_INTEGER_16)
144 case GFC_DTYPE_LOGICAL_16
:
145 case GFC_DTYPE_INTEGER_16
:
146 cshift1_8_i16 ((gfc_array_i16
*)ret
, (gfc_array_i16
*) array
,
151 case GFC_DTYPE_REAL_4
:
152 cshift1_8_r4 ((gfc_array_r4
*)ret
, (gfc_array_r4
*) array
,
156 case GFC_DTYPE_REAL_8
:
157 cshift1_8_r8 ((gfc_array_r8
*)ret
, (gfc_array_r8
*) array
,
161 #if defined (HAVE_REAL_10)
162 case GFC_DTYPE_REAL_10
:
163 cshift1_8_r10 ((gfc_array_r10
*)ret
, (gfc_array_r10
*) array
,
168 #if defined (HAVE_REAL_16)
169 case GFC_DTYPE_REAL_16
:
170 cshift1_8_r16 ((gfc_array_r16
*)ret
, (gfc_array_r16
*) array
,
175 case GFC_DTYPE_COMPLEX_4
:
176 cshift1_8_c4 ((gfc_array_c4
*)ret
, (gfc_array_c4
*) array
,
180 case GFC_DTYPE_COMPLEX_8
:
181 cshift1_8_c8 ((gfc_array_c8
*)ret
, (gfc_array_c8
*) array
,
185 #if defined (HAVE_COMPLEX_10)
186 case GFC_DTYPE_COMPLEX_10
:
187 cshift1_8_c10 ((gfc_array_c10
*)ret
, (gfc_array_c10
*) array
,
192 #if defined (HAVE_COMPLEX_16)
193 case GFC_DTYPE_COMPLEX_16
:
194 cshift1_8_c16 ((gfc_array_c16
*)ret
, (gfc_array_c16
*) array
,
208 /* Initialized for avoiding compiler warnings. */
213 for (dim
= 0; dim
< GFC_DESCRIPTOR_RANK (array
); dim
++)
217 roffset
= GFC_DESCRIPTOR_STRIDE_BYTES(ret
,dim
);
220 soffset
= GFC_DESCRIPTOR_STRIDE_BYTES(array
,dim
);
223 len
= GFC_DESCRIPTOR_EXTENT(array
,dim
);
228 extent
[n
] = GFC_DESCRIPTOR_EXTENT(array
,dim
);
229 rstride
[n
] = GFC_DESCRIPTOR_STRIDE_BYTES(ret
,dim
);
230 sstride
[n
] = GFC_DESCRIPTOR_STRIDE_BYTES(array
,dim
);
232 hstride
[n
] = GFC_DESCRIPTOR_STRIDE(h
,n
);
243 dim
= GFC_DESCRIPTOR_RANK (array
);
244 rstride0
= rstride
[0];
245 sstride0
= sstride
[0];
246 hstride0
= hstride
[0];
247 rptr
= ret
->base_addr
;
248 sptr
= array
->base_addr
;
253 /* Do the shift for this dimension. */
255 /* Normal case should be -len < sh < len; try to
256 avoid the expensive remainder operation if possible. */
259 if (unlikely (sh
>= len
|| sh
< 0))
266 src
= &sptr
[sh
* soffset
];
268 if (soffset
== size
&& roffset
== size
)
270 size_t len1
= sh
* size
;
271 size_t len2
= (len
- sh
) * size
;
272 memcpy (rptr
, sptr
+ len1
, len2
);
273 memcpy (rptr
+ len2
, sptr
, len1
);
277 for (n
= 0; n
< len
- sh
; n
++)
279 memcpy (dest
, src
, size
);
283 for (src
= sptr
, n
= 0; n
< sh
; n
++)
285 memcpy (dest
, src
, size
);
291 /* Advance to the next section. */
297 while (count
[n
] == extent
[n
])
299 /* When we get to the end of a dimension, reset it and increment
300 the next dimension. */
302 /* We could precalculate these products, but this is a less
303 frequently used path so probably not worth it. */
304 rptr
-= rstride
[n
] * extent
[n
];
305 sptr
-= sstride
[n
] * extent
[n
];
306 hptr
-= hstride
[n
] * extent
[n
];
310 /* Break out of the loop. */
325 void cshift1_8 (gfc_array_char
* const restrict
,
326 const gfc_array_char
* const restrict
,
327 const gfc_array_i8
* const restrict
,
328 const GFC_INTEGER_8
* const restrict
);
329 export_proto(cshift1_8
);
332 cshift1_8 (gfc_array_char
* const restrict ret
,
333 const gfc_array_char
* const restrict array
,
334 const gfc_array_i8
* const restrict h
,
335 const GFC_INTEGER_8
* const restrict pwhich
)
337 cshift1 (ret
, array
, h
, pwhich
);
341 void cshift1_8_char (gfc_array_char
* const restrict ret
,
343 const gfc_array_char
* const restrict array
,
344 const gfc_array_i8
* const restrict h
,
345 const GFC_INTEGER_8
* const restrict pwhich
,
347 export_proto(cshift1_8_char
);
350 cshift1_8_char (gfc_array_char
* const restrict ret
,
351 GFC_INTEGER_4 ret_length
__attribute__((unused
)),
352 const gfc_array_char
* const restrict array
,
353 const gfc_array_i8
* const restrict h
,
354 const GFC_INTEGER_8
* const restrict pwhich
,
355 GFC_INTEGER_4 array_length
__attribute__((unused
)))
357 cshift1 (ret
, array
, h
, pwhich
);
361 void cshift1_8_char4 (gfc_array_char
* const restrict ret
,
363 const gfc_array_char
* const restrict array
,
364 const gfc_array_i8
* const restrict h
,
365 const GFC_INTEGER_8
* const restrict pwhich
,
367 export_proto(cshift1_8_char4
);
370 cshift1_8_char4 (gfc_array_char
* const restrict ret
,
371 GFC_INTEGER_4 ret_length
__attribute__((unused
)),
372 const gfc_array_char
* const restrict array
,
373 const gfc_array_i8
* const restrict h
,
374 const GFC_INTEGER_8
* const restrict pwhich
,
375 GFC_INTEGER_4 array_length
__attribute__((unused
)))
377 cshift1 (ret
, array
, h
, pwhich
);