1 /* Implementation of the TRANSPOSE intrinsic
2 Copyright (C) 2003-2014 Free Software Foundation, Inc.
3 Contributed by Tobias Schlüter
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"
30 #if defined (HAVE_GFC_REAL_4)
32 extern void transpose_r4 (gfc_array_r4
* const restrict ret
,
33 gfc_array_r4
* const restrict source
);
34 export_proto(transpose_r4
);
37 transpose_r4 (gfc_array_r4
* const restrict ret
,
38 gfc_array_r4
* const restrict source
)
40 /* r.* indicates the return array. */
41 index_type rxstride
, rystride
;
42 GFC_REAL_4
* restrict rptr
;
43 /* s.* indicates the source array. */
44 index_type sxstride
, systride
;
45 const GFC_REAL_4
*sptr
;
47 index_type xcount
, ycount
;
50 assert (GFC_DESCRIPTOR_RANK (source
) == 2);
52 if (ret
->base_addr
== NULL
)
54 assert (GFC_DESCRIPTOR_RANK (ret
) == 2);
55 assert (ret
->dtype
== source
->dtype
);
57 GFC_DIMENSION_SET(ret
->dim
[0], 0, GFC_DESCRIPTOR_EXTENT(source
,1) - 1,
60 GFC_DIMENSION_SET(ret
->dim
[1], 0, GFC_DESCRIPTOR_EXTENT(source
,0) - 1,
61 GFC_DESCRIPTOR_EXTENT(source
, 1));
63 ret
->base_addr
= xmalloc (sizeof (GFC_REAL_4
) * size0 ((array_t
*) ret
));
65 } else if (unlikely (compile_options
.bounds_check
))
67 index_type ret_extent
, src_extent
;
69 ret_extent
= GFC_DESCRIPTOR_EXTENT(ret
,0);
70 src_extent
= GFC_DESCRIPTOR_EXTENT(source
,1);
72 if (src_extent
!= ret_extent
)
73 runtime_error ("Incorrect extent in return value of TRANSPOSE"
74 " intrinsic in dimension 1: is %ld,"
75 " should be %ld", (long int) src_extent
,
76 (long int) ret_extent
);
78 ret_extent
= GFC_DESCRIPTOR_EXTENT(ret
,1);
79 src_extent
= GFC_DESCRIPTOR_EXTENT(source
,0);
81 if (src_extent
!= ret_extent
)
82 runtime_error ("Incorrect extent in return value of TRANSPOSE"
83 " intrinsic in dimension 2: is %ld,"
84 " should be %ld", (long int) src_extent
,
85 (long int) ret_extent
);
89 sxstride
= GFC_DESCRIPTOR_STRIDE(source
,0);
90 systride
= GFC_DESCRIPTOR_STRIDE(source
,1);
91 xcount
= GFC_DESCRIPTOR_EXTENT(source
,0);
92 ycount
= GFC_DESCRIPTOR_EXTENT(source
,1);
94 rxstride
= GFC_DESCRIPTOR_STRIDE(ret
,0);
95 rystride
= GFC_DESCRIPTOR_STRIDE(ret
,1);
97 rptr
= ret
->base_addr
;
98 sptr
= source
->base_addr
;
100 for (y
=0; y
< ycount
; y
++)
102 for (x
=0; x
< xcount
; x
++)
109 sptr
+= systride
- (sxstride
* xcount
);
110 rptr
+= rxstride
- (rystride
* xcount
);