Opcode Instruction Clocks Description AC LODS m8 5 Load byte [(E)SI] into AL AD LODS m16 5 Load word [(E)SI] into AX AD LODS m32 5 Load dword [(E)SI] into EAX AC LODSB 5 Load byte DS:[(E)SI] into AL AD LODSW 5 Load word DS:[(E)SI] into AX AD LODSD 5 Load dword DS:[(E)SI] into EAX