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

Counts the leading most significant bits set.

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

This documentation is an old archive. Please see https://rust.docs.kernel.org instead.