diff options
Diffstat (limited to 'src/base/bitfield.hh')
| -rw-r--r-- | src/base/bitfield.hh | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/src/base/bitfield.hh b/src/base/bitfield.hh index 23c8b4b12..d696715b3 100644 --- a/src/base/bitfield.hh +++ b/src/base/bitfield.hh @@ -282,4 +282,15 @@ inline uint64_t alignToPowerOfTwo(uint64_t val) return val; }; +/** + * Count trailing zeros in a 32-bit value. + * + * Returns 32 if the value is zero. Note that the GCC builtin is + * undefined if the value is zero. + */ +inline int ctz32(uint32_t value) +{ + return value ? __builtin_ctz(value) : 32; +} + #endif // __BASE_BITFIELD_HH__ |