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
AND r8,r8 AND m8,r8 AND r8,m8 AND r16,r16 AND m16,r16 AND r16,m16 AND r32,r32 386+ AND m32,r32 386+ AND r32,m32 386+ AND r8,i8 AND m8,i8 AND r16,i16 AND m16,i16 AND r32,i32 386+ AND m32,i32 386+ AND AL,i8 AND AX,i16 AND EAX,i32 386+
AND BX,DI AND EAX,5 AND AX,0FFFFH ;Uses single-byte opcode AND AL,42H ;Uses single-byte opcode AND DWORD [EDI],EAX AND WORD ES:[BX],0B800H AND WORD [BP+SI],DX
AND performs the AND logical operation on its two operands. Once the operation is complete, the result replaces the destination operand. AND is performed on a bit-by-bit basis, such that bit 0 of the source is ANDed with bit 0 of the destination, bit 1 of the source is ANDed with bit 1 of the destination, and so on. The AND operation yields a 1 if both of the operands are 1; and a 0 only if either operand is 0. Note that the operation makes the Auxiliary carry flag undefined. CF and OF are cleared to 0, and the other affected flags are set according to the operation's results.
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