diff options
| -rw-r--r-- | src/vppinfra/bitops.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/src/vppinfra/bitops.h b/src/vppinfra/bitops.h index 17ad49ffb46..04365699f93 100644 --- a/src/vppinfra/bitops.h +++ b/src/vppinfra/bitops.h @@ -176,6 +176,32 @@ do { \ } \ } while (0) +static_always_inline u64 +reset_lowest_set_bit (u64 x) +{ +#ifdef __BMI__ + return _blsr_u64 (x); +#else + return x & (x - 1); +#endif +} + +static_always_inline u64 +get_lowest_set_bit (u64 x) +{ +#ifdef __BMI__ + return _blsi_u64 (x); +#else + return x & -x; +#endif +} + +static_always_inline u64 +get_lowest_set_bit_index (u64 x) +{ + return __builtin_ctzll (x); +} + #endif /* included_clib_bitops_h */ /* |