Function bitwise::word::count_leading_zeros
[−]
[src]
pub fn count_leading_zeros<T: Word>(x: T) -> T
Counts the number of leading zeros in the binary representation of x
.
Keywords:
Count leading zeros.
Intrinsics:
- ABM: lzcnt.
- BMI 1.0: lzcnt.
- ARMv5: clz.
- PowerPC: cntlzd.
- gcc/llvm builtin:
x == 0 ? mem::size_of(x) * 8 : __builtin_clz(x)
.
Examples
use bitwise::word::*; let n = 0b0010_1000u16; assert_eq!(n.count_leading_zeros(), 10); assert_eq!(count_leading_zeros(n), 10);