Function xadd64_u8 

pub fn xadd64_u8<E>(
    into: &mut E,
    dst: impl Into<XReg>,
    src1: impl Into<XReg>,
    src2: impl Into<u8>,
)
where
    E: Extend<u8>,

Available on crate feature encode only.

Same as xadd64 but src2 is a zero-extended 8-bit immediate.