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| author | Mattias Andrée <maandree@kth.se> | 2022-02-16 16:11:36 +0100 |
|---|---|---|
| committer | Mattias Andrée <maandree@kth.se> | 2022-02-16 16:11:36 +0100 |
| commit | d6f303ab33bdb97fa50a7daba6d4fa489a9feca2 (patch) | |
| tree | b36af440b4d97d7b13dc49683168c4fc18dbe463 /common.h | |
| parent | Fix style + minimal optimisation (diff) | |
| download | libar2-d6f303ab33bdb97fa50a7daba6d4fa489a9feca2.tar.gz libar2-d6f303ab33bdb97fa50a7daba6d4fa489a9feca2.tar.bz2 libar2-d6f303ab33bdb97fa50a7daba6d4fa489a9feca2.tar.xz | |
Small optimisation for little-endian machines
Signed-off-by: Mattias Andrée <maandree@kth.se>
Diffstat (limited to 'common.h')
| -rw-r--r-- | common.h | 22 |
1 files changed, 22 insertions, 0 deletions
@@ -54,6 +54,28 @@ #endif +#define LITTLE_ENDIAN__ 1234 +#define BIG_ENDIAN__ 4321 +#ifndef HOST_ENDIAN +# if defined(i386) || defined(__i386__) || defined(__x86_64__) +# define HOST_ENDIAN LITTLE_ENDIAN__ +# endif +#endif +#ifdef HOST_ENDIAN +# if HOST_ENDIAN == LITTLE_ENDIAN__ +# define USING_LITTLE_ENDIAN +# elif HOST_ENDIAN == BIG_ENDIAN__ +# define USING_BIG_ENDIAN +# endif +#else +# ifdef __GNUC__ +# ifdef WARN_UNKNOWN_ENDIAN +# warning The host endian is unknown +# endif +# endif +#endif + + #define ELEMSOF(ARR) (sizeof(ARR) / sizeof(*(ARR))) #define MAX(A, B) ((A) > (B) ? (A) : (B)) |