Function bitwise::word::count_ones [−] [src]

pub fn count_ones<T: Word>(x: T) -> T

Number of ones in the binary representation of x.

Keywords:

Population count, popcount, hamming weight, sideways sum.

Intrinsics:

  • ABM: popcnt.
  • SSE4.2: popcnt.
  • NEON: vcnt.
  • PowerPC: popcntb.
  • gcc/llvm builtin: __builtin_popcount(x).

Examples

use bitwise::word::*;

let n = 0b0100_1100u8;

assert_eq!(n.count_ones(), 3);
assert_eq!(count_ones(n), 3);