O D I T S Z A P C OF: Overflow flag TF: Trap flag AF: Aux carry F F F F F F F F F DF: Direction flag SF: Sign flag PF: Parity flag * * * * * * IF: Interrupt flag ZF: Zero flag CF: Carry flag
ADD r8,r8 ADD m8,r8 ADD r8,m8 ADD r16,r16 ADD m16,r16 ADD r16,m16 ADD r32,r32 386+ ADD m32,r32 386+ ADD r32,m32 386+ ADD r8,i8 ADD m8,i8 ADD r16,i16 ADD m16,i16 ADD r32,i32 386+ ADD m32,i32 386+ ADD r16,i8 ADD m16,i8 ADD r32,i8 386+ ADD m32,i8 386+ ADD AL,i8 ADD AX,i16 ADD EAX,i32 386+
ADD BX,DI ADD AX,0FFFFH ;Uses single-byte opcode ADD AL,42H ;Uses single-byte opcode ADD EAX,5 ADD BP,17H AND DWORD [EDI],EAX ADD WORD [BX+SI+Inset],5 ADD WORD ES:[BX],0B800H
ADD adds the source operand to the destination operand, and after the operation, the result replaces the destination operand. The add operation is an arithmetic add, and does not take the Carry flag into account. (To add using the Carry flag, use the ADC Add with Carry instruction.) All affected flags are set according to the operation. Most importantly, if the result does not fit into the destination operand, the Carry flag is set to 1.
r8 = AL AH BL BH CL CH DL DH r16 = AX BX CX DX BP SP SI DI sr = CS DS SS ES FS GS r32 = EAX EBX ECX EDX EBP ESP ESI EDI m8 = 8-bit memory data m16 = 16-bit memory data m32 = 32-bit memory data i8 = 8-bit immediate data i16 = 16-bit immediate data i32 = 32-bit immediate data d8 = 8-bit signed displacement d16 = 16-bit signed displacement d32 = 32-bit unsigned displacement