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_popcnt64
core
1.98.0-nightly
(e7815e522 2026-06-04)
In core::
arch::
x86_
64
core
::
arch
::
x86_64
Function
_popcnt64
Copy item path
1.27.0 (const:
unstable
)
·
Source
pub fn _popcnt64(x:
i64
) ->
i32
Available on
x86-64 and target feature
popcnt
only.
Expand description
Counts the bits that are set.
Intel’s documentation