Fix instruction encoding bug for LD
Fix instruction encoding bug for LD

sam-falvo/kestrel,8l/kestrel,sam-falvo/kestrel,KestrelComputer/kestrel,8l/kestrel,8l/kestrel,sam-falvo/kestrel,sam-falvo/kestrel,KestrelComputer/kestrel,8l/kestrel,KestrelComputer/kestrel,8l/kestrel,KestrelComputer/kestrel,8l/kestrel