diff options
Diffstat (limited to 'src/vppinfra/bitops.h')
| -rw-r--r-- | src/vppinfra/bitops.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/vppinfra/bitops.h b/src/vppinfra/bitops.h index ab91b8ae443..17ad49ffb46 100644 --- a/src/vppinfra/bitops.h +++ b/src/vppinfra/bitops.h @@ -44,6 +44,13 @@ always_inline uword count_set_bits (uword x) { +#ifdef __POPCNT__ +#if uword_bits == 64 + return __builtin_popcountll (x); +#else + return __builtin_popcount (x); +#endif +#else #if uword_bits == 64 const uword c1 = 0x5555555555555555; const uword c2 = 0x3333333333333333; @@ -71,6 +78,7 @@ count_set_bits (uword x) #endif return x & (2 * BITS (uword) - 1); +#endif } /* Based on "Hacker's Delight" code from GLS. */ |