1 /* Implementation of the CSHIFT intrinsic.
2 Copyright (C) 2017-2022 Free Software Foundation, Inc.
3 Contributed by Thomas Koenig <tkoenig@gcc.gnu.org>
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 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_4) && defined (HAVE_GFC_INTEGER_8)
32 cshift1_8_r4 (gfc_array_r4
* const restrict ret
,
33 const gfc_array_r4
* const restrict array
,
34 const gfc_array_i8
* const restrict h
,
35 const GFC_INTEGER_8
* const restrict pwhich
)
37 /* r.* indicates the return array. */
38 index_type rstride
[GFC_MAX_DIMENSIONS
];
43 /* s.* indicates the source array. */
44 index_type sstride
[GFC_MAX_DIMENSIONS
];
47 const GFC_REAL_4
*sptr
;
48 const GFC_REAL_4
*src
;
49 /* h.* indicates the shift array. */
50 index_type hstride
[GFC_MAX_DIMENSIONS
];
52 const GFC_INTEGER_8
*hptr
;
54 index_type count
[GFC_MAX_DIMENSIONS
];
55 index_type extent
[GFC_MAX_DIMENSIONS
];
56 index_type rs_ex
[GFC_MAX_DIMENSIONS
];
57 index_type ss_ex
[GFC_MAX_DIMENSIONS
];
58 index_type hs_ex
[GFC_MAX_DIMENSIONS
];
66 /* Bounds checking etc is already done by the caller. */
77 /* Initialized for avoiding compiler warnings. */
82 for (dim
= 0; dim
< GFC_DESCRIPTOR_RANK (array
); dim
++)
86 roffset
= GFC_DESCRIPTOR_STRIDE(ret
,dim
);
89 soffset
= GFC_DESCRIPTOR_STRIDE(array
,dim
);
92 len
= GFC_DESCRIPTOR_EXTENT(array
,dim
);
97 extent
[n
] = GFC_DESCRIPTOR_EXTENT(array
,dim
);
98 rstride
[n
] = GFC_DESCRIPTOR_STRIDE(ret
,dim
);
99 sstride
[n
] = GFC_DESCRIPTOR_STRIDE(array
,dim
);
100 hstride
[n
] = GFC_DESCRIPTOR_STRIDE(h
,n
);
101 rs_ex
[n
] = rstride
[n
] * extent
[n
];
102 ss_ex
[n
] = sstride
[n
] * extent
[n
];
103 hs_ex
[n
] = hstride
[n
] * extent
[n
];
114 dim
= GFC_DESCRIPTOR_RANK (array
);
115 rstride0
= rstride
[0];
116 sstride0
= sstride
[0];
117 hstride0
= hstride
[0];
118 rptr
= ret
->base_addr
;
119 sptr
= array
->base_addr
;
124 /* Do the shift for this dimension. */
126 /* Normal case should be -len < sh < len; try to
127 avoid the expensive remainder operation if possible. */
130 if (unlikely(sh
>= len
|| sh
< 0))
136 src
= &sptr
[sh
* soffset
];
138 if (soffset
== 1 && roffset
== 1)
140 size_t len1
= sh
* sizeof (GFC_REAL_4
);
141 size_t len2
= (len
- sh
) * sizeof (GFC_REAL_4
);
142 memcpy (rptr
, sptr
+ sh
, len2
);
143 memcpy (rptr
+ (len
- sh
), sptr
, len1
);
147 for (n
= 0; n
< len
- sh
; n
++)
153 for (src
= sptr
, n
= 0; n
< sh
; n
++)
161 /* Advance to the next section. */
167 while (count
[n
] == extent
[n
])
169 /* When we get to the end of a dimension, reset it and increment
170 the next dimension. */
178 /* Break out of the loop. */