diff options
| -rw-r--r-- | src/vppinfra/clib.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/vppinfra/clib.h b/src/vppinfra/clib.h index f0c3aca1e03..81b59e21a0b 100644 --- a/src/vppinfra/clib.h +++ b/src/vppinfra/clib.h @@ -251,6 +251,9 @@ min_log2_u64 (u64 x) always_inline uword pow2_mask (uword x) { +#ifdef __BMI2__ + return _bzhi_u64 (-1ULL, x); +#endif return ((uword) 1 << x) - (uword) 1; } |