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1ee3acfb | 1 | /* Implementation of the MVBITS intrinsic |
5624e564 | 2 | Copyright (C) 2004-2015 Free Software Foundation, Inc. |
56746a07 | 3 | Contributed by Tobias Schlüter |
1ee3acfb AP |
4 | |
5 | This file is part of the GNU Fortran 95 runtime library (libgfortran). | |
6 | ||
7 | Libgfortran is free software; you can redistribute it and/or | |
57dea9f6 | 8 | modify it under the terms of the GNU General Public |
1ee3acfb | 9 | License as published by the Free Software Foundation; either |
748086b7 | 10 | version 3 of the License, or (at your option) any later version. |
1ee3acfb AP |
11 | |
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 | |
57dea9f6 | 15 | GNU General Public License for more details. |
1ee3acfb | 16 | |
748086b7 JJ |
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. | |
20 | ||
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/>. */ | |
1ee3acfb AP |
25 | |
26 | /* TODO: This should be replaced by a compiler builtin. */ | |
27 | ||
28 | #ifndef SUB_NAME | |
29 | #include <libgfortran.h> | |
30 | #endif | |
31 | ||
32 | #ifdef SUB_NAME | |
33 | /* MVBITS copies LEN bits starting at bit position FROMPOS from FROM | |
34 | into TO, starting at bit position TOPOS. */ | |
35 | ||
37058415 FXC |
36 | extern void SUB_NAME (const TYPE *, const int *, const int *, TYPE *, |
37 | const int *); | |
7d7b8bfe RH |
38 | export_proto(SUB_NAME); |
39 | ||
1ee3acfb | 40 | void |
37058415 FXC |
41 | SUB_NAME (const TYPE *from, const int *frompos, const int *len, TYPE *to, |
42 | const int *topos) | |
1ee3acfb AP |
43 | { |
44 | TYPE oldbits, newbits, lenmask; | |
45 | ||
43ff4e9a | 46 | lenmask = (*len == sizeof (TYPE)*8) ? ~(TYPE)0 : ((TYPE)1 << *len) - 1; |
1ee3acfb AP |
47 | newbits = (((UTYPE)(*from) >> *frompos) & lenmask) << *topos; |
48 | oldbits = *to & (~(lenmask << *topos)); | |
49 | ||
50 | *to = newbits | oldbits; | |
51 | } | |
52 | #endif | |
53 | ||
54 | #ifndef SUB_NAME | |
56746a07 TS |
55 | # define TYPE GFC_INTEGER_1 |
56 | # define UTYPE GFC_UINTEGER_1 | |
57 | # define SUB_NAME mvbits_i1 | |
58 | # include "mvbits.c" | |
59 | # undef SUB_NAME | |
60 | # undef TYPE | |
61 | # undef UTYPE | |
62 | ||
63 | # define TYPE GFC_INTEGER_2 | |
64 | # define UTYPE GFC_UINTEGER_2 | |
65 | # define SUB_NAME mvbits_i2 | |
66 | # include "mvbits.c" | |
67 | # undef SUB_NAME | |
68 | # undef TYPE | |
69 | # undef UTYPE | |
70 | ||
1ee3acfb AP |
71 | # define TYPE GFC_INTEGER_4 |
72 | # define UTYPE GFC_UINTEGER_4 | |
7d7b8bfe | 73 | # define SUB_NAME mvbits_i4 |
1ee3acfb AP |
74 | # include "mvbits.c" |
75 | # undef SUB_NAME | |
76 | # undef TYPE | |
77 | # undef UTYPE | |
78 | ||
79 | # define TYPE GFC_INTEGER_8 | |
80 | # define UTYPE GFC_UINTEGER_8 | |
7d7b8bfe | 81 | # define SUB_NAME mvbits_i8 |
1ee3acfb AP |
82 | # include "mvbits.c" |
83 | # undef SUB_NAME | |
84 | # undef TYPE | |
85 | # undef UTYPE | |
0238e1e9 SK |
86 | |
87 | # define TYPE GFC_INTEGER_16 | |
88 | # define UTYPE GFC_UINTEGER_16 | |
89 | # define SUB_NAME mvbits_i16 | |
90 | # include "mvbits.c" | |
91 | # undef SUB_NAME | |
92 | # undef TYPE | |
93 | # undef UTYPE | |
1ee3acfb | 94 | #endif |