Function vunarrow64x2_u 

pub fn vunarrow64x2_u<E>(
    into: &mut E,
    operands: impl Into<BinaryOperands<VReg>>,
)
where
    E: Extend<u8>,

Available on crate feature encode only.

Narrows the two 64x2 vectors, assuming all input lanes are unsigned, to half the width. Narrowing is unsigned and saturating.