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| author |   Damjan Marion <damarion@cisco.com> | 2022-01-05 14:06:34 +0100 |
|---|---|---|
| committer |   Florin Coras <florin.coras@gmail.com> | 2022-01-05 17:01:49 +0000 |
| commit | fdc874af1ea8be505cd5d88663215e4f4481a7a6 (patch) | |
| tree | 6f79b63c766009dd9952d169388fe246f9ad47e6 /src/vppinfra/bitops.h | |
| parent | 5b9cb0d275959aeb7f4e9dfb7353b638ec9a2e5a (diff) | |
vppinfra: few bitops inlines
Change-Id: I9aa01fafd5329a399aa9d72a6e2cc6c9d65dc85c
Type: improvement
Signed-off-by: Damjan Marion <damarion@cisco.com>
Diffstat (limited to 'src/vppinfra/bitops.h')
| -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 */ /* |