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Diffstat (limited to '')
-rw-r--r-- | C/RotateDefs.h | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/C/RotateDefs.h b/C/RotateDefs.h new file mode 100644 index 0000000..8f01d1a --- /dev/null +++ b/C/RotateDefs.h | |||
@@ -0,0 +1,30 @@ | |||
1 | /* RotateDefs.h -- Rotate functions | ||
2 | 2015-03-25 : Igor Pavlov : Public domain */ | ||
3 | |||
4 | #ifndef __ROTATE_DEFS_H | ||
5 | #define __ROTATE_DEFS_H | ||
6 | |||
7 | #ifdef _MSC_VER | ||
8 | |||
9 | #include <stdlib.h> | ||
10 | |||
11 | /* don't use _rotl with MINGW. It can insert slow call to function. */ | ||
12 | |||
13 | /* #if (_MSC_VER >= 1200) */ | ||
14 | #pragma intrinsic(_rotl) | ||
15 | #pragma intrinsic(_rotr) | ||
16 | /* #endif */ | ||
17 | |||
18 | #define rotlFixed(x, n) _rotl((x), (n)) | ||
19 | #define rotrFixed(x, n) _rotr((x), (n)) | ||
20 | |||
21 | #else | ||
22 | |||
23 | /* new compilers can translate these macros to fast commands. */ | ||
24 | |||
25 | #define rotlFixed(x, n) (((x) << (n)) | ((x) >> (32 - (n)))) | ||
26 | #define rotrFixed(x, n) (((x) >> (n)) | ((x) << (32 - (n)))) | ||
27 | |||
28 | #endif | ||
29 | |||
30 | #endif | ||