Function core::arch::aarch64::_cls_u64[][src]

pub unsafe fn _cls_u64(x: u64) -> u64
🔬 This is a nightly-only experimental API. (stdsimd #48556)
This is supported on AArch64 only.

Counts the leading most significant bits set.

When all bits of the operand are set it returns the size of the operand in bits.