diff options
| -rw-r--r-- | src/include/port/pg_bitutils.h | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/src/include/port/pg_bitutils.h b/src/include/port/pg_bitutils.h index 21a4fa03410..4f1a13dba93 100644 --- a/src/include/port/pg_bitutils.h +++ b/src/include/port/pg_bitutils.h @@ -48,8 +48,9 @@ pg_leftmost_one_pos32(uint32 word) unsigned long result; bool non_zero; + Assert(word != 0); + non_zero = _BitScanReverse(&result, word); - Assert(non_zero); return (int) result; #else int shift = 32 - 8; @@ -85,8 +86,9 @@ pg_leftmost_one_pos64(uint64 word) unsigned long result; bool non_zero; + Assert(word != 0); + non_zero = _BitScanReverse64(&result, word); - Assert(non_zero); return (int) result; #else int shift = 64 - 8; @@ -116,8 +118,9 @@ pg_rightmost_one_pos32(uint32 word) unsigned long result; bool non_zero; + Assert(word != 0); + non_zero = _BitScanForward(&result, word); - Assert(non_zero); return (int) result; #else int result = 0; @@ -156,8 +159,9 @@ pg_rightmost_one_pos64(uint64 word) unsigned long result; bool non_zero; + Assert(word != 0); + non_zero = _BitScanForward64(&result, word); - Assert(non_zero); return (int) result; #else int result = 0; |