1 /* Implementation of the PARITY intrinsic
2 Copyright (C) 2010-2017 Free Software Foundation, Inc.
3 Contributed by Tobias Burnus <burnus@net-b.de>
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_LOGICAL_4) && defined (HAVE_GFC_LOGICAL_4)
32 extern void parity_l4 (gfc_array_l4
* const restrict
,
33 gfc_array_l4
* const restrict
, const index_type
* const restrict
);
34 export_proto(parity_l4
);
37 parity_l4 (gfc_array_l4
* const restrict retarray
,
38 gfc_array_l4
* const restrict array
,
39 const index_type
* const restrict pdim
)
41 index_type count
[GFC_MAX_DIMENSIONS
];
42 index_type extent
[GFC_MAX_DIMENSIONS
];
43 index_type sstride
[GFC_MAX_DIMENSIONS
];
44 index_type dstride
[GFC_MAX_DIMENSIONS
];
45 const GFC_LOGICAL_4
* restrict base
;
46 GFC_LOGICAL_4
* restrict dest
;
54 /* Make dim zero based to avoid confusion. */
56 rank
= GFC_DESCRIPTOR_RANK (array
) - 1;
58 len
= GFC_DESCRIPTOR_EXTENT(array
,dim
);
61 delta
= GFC_DESCRIPTOR_STRIDE(array
,dim
);
63 for (n
= 0; n
< dim
; n
++)
65 sstride
[n
] = GFC_DESCRIPTOR_STRIDE(array
,n
);
66 extent
[n
] = GFC_DESCRIPTOR_EXTENT(array
,n
);
71 for (n
= dim
; n
< rank
; n
++)
73 sstride
[n
] = GFC_DESCRIPTOR_STRIDE(array
, n
+ 1);
74 extent
[n
] = GFC_DESCRIPTOR_EXTENT(array
, n
+ 1);
80 if (retarray
->base_addr
== NULL
)
82 size_t alloc_size
, str
;
84 for (n
= 0; n
< rank
; n
++)
89 str
= GFC_DESCRIPTOR_STRIDE(retarray
,n
-1) * extent
[n
-1];
91 GFC_DIMENSION_SET(retarray
->dim
[n
], 0, extent
[n
] - 1, str
);
96 retarray
->dtype
= (array
->dtype
& ~GFC_DTYPE_RANK_MASK
) | rank
;
98 alloc_size
= GFC_DESCRIPTOR_STRIDE(retarray
,rank
-1) * extent
[rank
-1];
100 retarray
->base_addr
= xmallocarray (alloc_size
, sizeof (GFC_LOGICAL_4
));
103 /* Make sure we have a zero-sized array. */
104 GFC_DIMENSION_SET(retarray
->dim
[0], 0, -1, 1);
111 if (rank
!= GFC_DESCRIPTOR_RANK (retarray
))
112 runtime_error ("rank of return array incorrect in"
113 " PARITY intrinsic: is %ld, should be %ld",
114 (long int) (GFC_DESCRIPTOR_RANK (retarray
)),
117 if (unlikely (compile_options
.bounds_check
))
118 bounds_ifunction_return ((array_t
*) retarray
, extent
,
119 "return value", "PARITY");
122 for (n
= 0; n
< rank
; n
++)
125 dstride
[n
] = GFC_DESCRIPTOR_STRIDE(retarray
,n
);
130 base
= array
->base_addr
;
131 dest
= retarray
->base_addr
;
134 while (continue_loop
)
136 const GFC_LOGICAL_4
* restrict src
;
137 GFC_LOGICAL_4 result
;
146 for (n
= 0; n
< len
; n
++, src
+= delta
)
149 result
= result
!= *src
;
155 /* Advance to the next element. */
160 while (count
[n
] == extent
[n
])
162 /* When we get to the end of a dimension, reset it and increment
163 the next dimension. */
165 /* We could precalculate these products, but this is a less
166 frequently used path so probably not worth it. */
167 base
-= sstride
[n
] * extent
[n
];
168 dest
-= dstride
[n
] * extent
[n
];
172 /* Break out of the loop. */