1 /* Implementation of the RESHAPE intrinsic
2 Copyright (C) 2002-2023 Free Software Foundation, Inc.
3 Contributed by Paul Brook <paul@nowt.org>
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 Libgfortran 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"
29 #if defined (HAVE_GFC_REAL_16)
31 typedef GFC_FULL_ARRAY_DESCRIPTOR(1, index_type
) shape_type
;
34 extern void reshape_r16 (gfc_array_r16
* const restrict
,
35 gfc_array_r16
* const restrict
,
36 shape_type
* const restrict
,
37 gfc_array_r16
* const restrict
,
38 shape_type
* const restrict
);
39 export_proto(reshape_r16
);
42 reshape_r16 (gfc_array_r16
* const restrict ret
,
43 gfc_array_r16
* const restrict source
,
44 shape_type
* const restrict shape
,
45 gfc_array_r16
* const restrict pad
,
46 shape_type
* const restrict order
)
48 /* r.* indicates the return array. */
49 index_type rcount
[GFC_MAX_DIMENSIONS
];
50 index_type rextent
[GFC_MAX_DIMENSIONS
];
51 index_type rstride
[GFC_MAX_DIMENSIONS
];
58 /* s.* indicates the source array. */
59 index_type scount
[GFC_MAX_DIMENSIONS
];
60 index_type sextent
[GFC_MAX_DIMENSIONS
];
61 index_type sstride
[GFC_MAX_DIMENSIONS
];
65 const GFC_REAL_16
*sptr
;
66 /* p.* indicates the pad array. */
67 index_type pcount
[GFC_MAX_DIMENSIONS
];
68 index_type pextent
[GFC_MAX_DIMENSIONS
];
69 index_type pstride
[GFC_MAX_DIMENSIONS
];
72 const GFC_REAL_16
*pptr
;
74 const GFC_REAL_16
*src
;
75 int sempty
, pempty
, shape_empty
;
76 index_type shape_data
[GFC_MAX_DIMENSIONS
];
78 rdim
= GFC_DESCRIPTOR_EXTENT(shape
,0);
79 /* rdim is always > 0; this lets the compiler optimize more and
80 avoids a potential warning. */
83 if (rdim
!= GFC_DESCRIPTOR_RANK(ret
))
84 runtime_error("rank of return array incorrect in RESHAPE intrinsic");
88 for (index_type n
= 0; n
< rdim
; n
++)
90 shape_data
[n
] = shape
->base_addr
[n
* GFC_DESCRIPTOR_STRIDE(shape
,0)];
91 if (shape_data
[n
] <= 0)
98 if (ret
->base_addr
== NULL
)
100 index_type alloc_size
;
103 for (index_type n
= 0; n
< rdim
; n
++)
107 GFC_DIMENSION_SET(ret
->dim
[n
], 0, rex
- 1, rs
);
113 if (unlikely (rs
< 1))
118 ret
->base_addr
= xmallocarray (alloc_size
, sizeof (GFC_REAL_16
));
119 ret
->dtype
.rank
= rdim
;
127 pdim
= GFC_DESCRIPTOR_RANK (pad
);
130 for (index_type n
= 0; n
< pdim
; n
++)
133 pstride
[n
] = GFC_DESCRIPTOR_STRIDE(pad
,n
);
134 pextent
[n
] = GFC_DESCRIPTOR_EXTENT(pad
,n
);
141 if (psize
== pstride
[n
])
146 pptr
= pad
->base_addr
;
156 if (unlikely (compile_options
.bounds_check
))
158 index_type ret_extent
, source_extent
;
161 for (index_type n
= 0; n
< rdim
; n
++)
164 ret_extent
= GFC_DESCRIPTOR_EXTENT(ret
,n
);
165 if (ret_extent
!= shape_data
[n
])
166 runtime_error("Incorrect extent in return value of RESHAPE"
167 " intrinsic in dimension %ld: is %ld,"
168 " should be %ld", (long int) n
+1,
169 (long int) ret_extent
, (long int) shape_data
[n
]);
173 sdim
= GFC_DESCRIPTOR_RANK (source
);
174 for (index_type n
= 0; n
< sdim
; n
++)
177 se
= GFC_DESCRIPTOR_EXTENT(source
,n
);
178 source_extent
*= se
> 0 ? se
: 0;
181 if (rs
> source_extent
&& (!pad
|| pempty
))
182 runtime_error("Incorrect size in SOURCE argument to RESHAPE"
183 " intrinsic: is %ld, should be %ld",
184 (long int) source_extent
, (long int) rs
);
188 int seen
[GFC_MAX_DIMENSIONS
];
191 for (index_type n
= 0; n
< rdim
; n
++)
194 for (index_type n
= 0; n
< rdim
; n
++)
196 v
= order
->base_addr
[n
* GFC_DESCRIPTOR_STRIDE(order
,0)] - 1;
198 if (v
< 0 || v
>= rdim
)
199 runtime_error("Value %ld out of range in ORDER argument"
200 " to RESHAPE intrinsic", (long int) v
+ 1);
203 runtime_error("Duplicate value %ld in ORDER argument to"
204 " RESHAPE intrinsic", (long int) v
+ 1);
212 for (index_type n
= 0; n
< rdim
; n
++)
216 dim
= order
->base_addr
[n
* GFC_DESCRIPTOR_STRIDE(order
,0)] - 1;
221 rstride
[n
] = GFC_DESCRIPTOR_STRIDE(ret
,dim
);
222 rextent
[n
] = GFC_DESCRIPTOR_EXTENT(ret
,dim
);
226 if (rextent
[n
] != shape_data
[dim
])
227 runtime_error ("shape and target do not conform");
229 if (rsize
== rstride
[n
])
237 sdim
= GFC_DESCRIPTOR_RANK (source
);
239 /* sdim is always > 0; this lets the compiler optimize more and
245 for (index_type n
= 0; n
< sdim
; n
++)
248 sstride
[n
] = GFC_DESCRIPTOR_STRIDE(source
,n
);
249 sextent
[n
] = GFC_DESCRIPTOR_EXTENT(source
,n
);
256 if (ssize
== sstride
[n
])
262 if (rsize
!= 0 && ssize
!= 0 && psize
!= 0)
264 rsize
*= sizeof (GFC_REAL_16
);
265 ssize
*= sizeof (GFC_REAL_16
);
266 psize
*= sizeof (GFC_REAL_16
);
267 reshape_packed ((char *)ret
->base_addr
, rsize
, (char *)source
->base_addr
,
268 ssize
, pad
? (char *)pad
->base_addr
: NULL
, psize
);
271 rptr
= ret
->base_addr
;
272 src
= sptr
= source
->base_addr
;
273 rstride0
= rstride
[0];
274 sstride0
= sstride
[0];
276 if (sempty
&& pempty
)
281 /* Pretend we are using the pad array the first time around, too. */
285 for (index_type dim
= 0; dim
< pdim
; dim
++)
287 scount
[dim
] = pcount
[dim
];
288 sextent
[dim
] = pextent
[dim
];
289 sstride
[dim
] = pstride
[dim
];
290 sstride0
= pstride
[0];
296 /* Select between the source and pad arrays. */
298 /* Advance to the next element. */
304 /* Advance to the next destination element. */
306 while (rcount
[n
] == rextent
[n
])
308 /* When we get to the end of a dimension, reset it and increment
309 the next dimension. */
311 /* We could precalculate these products, but this is a less
312 frequently used path so probably not worth it. */
313 rptr
-= rstride
[n
] * rextent
[n
];
317 /* Break out of the loop. */
327 /* Advance to the next source element. */
329 while (scount
[n
] == sextent
[n
])
331 /* When we get to the end of a dimension, reset it and increment
332 the next dimension. */
334 /* We could precalculate these products, but this is a less
335 frequently used path so probably not worth it. */
336 src
-= sstride
[n
] * sextent
[n
];
342 /* Switch to the pad array. */
345 for (index_type dim
= 0; dim
< pdim
; dim
++)
347 scount
[dim
] = pcount
[dim
];
348 sextent
[dim
] = pextent
[dim
];
349 sstride
[dim
] = pstride
[dim
];
350 sstride0
= sstride
[0];
353 /* We now start again from the beginning of the pad array. */