Split the Encoding data type into two u16 values.
Split the Encoding data type into two u16 values.

This hardcodes the division line between the recipe bits and the
encoding bits. It does not seem that any ISA will need more than 16 bits for
either.

sunfishcode/cretonne,stoklund/cretonne,sunfishcode/cretonne,stoklund/cretonne,sunfishcode/cretonne,stoklund/cretonne