diff options
Diffstat (limited to 'src/libstddjb/uint64_bswap.c')
| -rw-r--r-- | src/libstddjb/uint64_bswap.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/src/libstddjb/uint64_bswap.c b/src/libstddjb/uint64_bswap.c new file mode 100644 index 0000000..3dfaf18 --- /dev/null +++ b/src/libstddjb/uint64_bswap.c @@ -0,0 +1,16 @@ +/* ISC license. */ + +#include <skalibs/uint64.h> + +uint64_t uint64_bswap (uint64_t a) +{ + return + (a & 0x00000000000000ffull) << 56 | + (a & 0x000000000000ff00ull) << 40 | + (a & 0x0000000000ff0000ull) << 24 | + (a & 0x00000000ff000000ull) << 8 | + (a & 0x000000ff00000000ull) >> 8 | + (a & 0x0000ff0000000000ull) >> 24 | + (a & 0x00ff000000000000ull) >> 40 | + (a & 0xff00000000000000ull) >> 56 ; +} |