Function exchanged_value_for_load_without_sign_extension 

pub(crate) fn exchanged_value_for_load_without_sign_extension(
    cfg: &SystemConfiguration,
    source: &Unsigned36Bit,
    dest: &Unsigned36Bit,
) -> Unsigned36Bit

Perform an exchange operation in the M->E direction, but without sign extension of the inactive quarters of the target.