Function bitintr::abm::popcnt

pub fn popcnt<T: Int>(x: T) -> T

Counts the bits that are set.

Keywords: Population count, count ones, Hamming weight, Sideways sum.

Intrinsic (when available: ABM / SSE4.2)

POPCNT: Population Count (supports 16/32/64 bit registers).

Note: Intel considers it part of SSE4.2 but advertises it with its own CPUID flag.

Example

use bitintr::abm::popcnt;
assert_eq!(popcnt(0b0101_1010u16), 4);