diff options
Diffstat (limited to 'common/bits.c')
| -rw-r--r-- | common/bits.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/common/bits.c b/common/bits.c new file mode 100644 index 0000000..ca99ed2 --- /dev/null +++ b/common/bits.c @@ -0,0 +1,32 @@ +#include <apos/types.h> +#include <apos/attrs.h> +#include <apos/bits.h> +#include <apos/builtin.h> + +#undef __bswap16 +__weak uint16_t __bswap16(uint16_t u) +{ + return (u & 0xff00) >> 8 | (u & 0x00ff) << 8; +} + +#undef __bswap32 +__weak uint32_t __bswap32(uint32_t u) +{ + return (u & 0xff000000) >> 24 | + (u & 0x00ff0000) >> 8 | + (u & 0x0000ff00) << 8 | + (u & 0x000000ff) << 24; +} + +#undef __bswap64 +__weak uint64_t __bswap64(uint64_t u) +{ + return (u & 0xff00000000000000ULL) >> 56 | + (u & 0x00ff000000000000ULL) >> 40 | + (u & 0x0000ff0000000000ULL) >> 24 | + (u & 0x000000ff00000000ULL) >> 8 | + (u & 0x00000000ff000000ULL) << 8 | + (u & 0x0000000000ff0000ULL) << 24 | + (u & 0x000000000000ff00ULL) << 40 | + (u & 0x00000000000000ffULL) << 56; +} |