AND Logical AND

Flags affected:

        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

Legal forms:

        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+

Examples:

        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

Notes:

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