diff options
Diffstat (limited to 'src/include/port/pg_bitutils.h')
| -rw-r--r-- | src/include/port/pg_bitutils.h | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/src/include/port/pg_bitutils.h b/src/include/port/pg_bitutils.h index 44c74fb9743..04e58cd1c44 100644 --- a/src/include/port/pg_bitutils.h +++ b/src/include/port/pg_bitutils.h @@ -285,12 +285,18 @@ extern int pg_popcount64(uint64 word); extern uint64 pg_popcount(const char *buf, int bytes); /* - * Rotate the bits of "word" to the right by n bits. + * Rotate the bits of "word" to the right/left by n bits. */ static inline uint32 pg_rotate_right32(uint32 word, int n) { - return (word >> n) | (word << (sizeof(word) * BITS_PER_BYTE - n)); + return (word >> n) | (word << (32 - n)); +} + +static inline uint32 +pg_rotate_left32(uint32 word, int n) +{ + return (word << n) | (word >> (32 - n)); } #endif /* PG_BITUTILS_H */ |