Function core::arch::x86_64::_mm_tzcnt_64 [] [src]

pub unsafe fn _mm_tzcnt_64(x: u64) -> i64
🔬 This is a nightly-only experimental API. (stdsimd #48556)
This is supported on x86-64 and target feature bmi1 only.

Counts the number of trailing least significant zero bits.

When the source operand is 0, it returns its size in bits.