Logical Exclusive OR
xor r/m8, reg8 | xor r/m16, reg16 | xor r/m32, reg32 | xor r/m64, reg64 | xor reg8, r/m8 | xor reg16, r/m16 | xor reg32, r/m32 | xor reg64, r/m64 | xor r/m16, imm8 | xor r/m32, imm8 | xor r/m64, imm8 | xor al, imm8 | xor ax, imm16 | xor eax, imm32 | xor rax, imm32 | xor r/m8, imm8 | xor r/m16, imm16 | xor r/m32, imm32 | xor r/m64, imm32 | xor [reg8], reg8, r/m8 | xor [reg16], reg16, r/m16 | xor [reg32], reg32, r/m32 | xor [reg64], reg64, r/m64 | xor [reg8], r/m8, reg8 | xor [reg16], r/m16, reg16 | xor [reg32], r/m32, reg32 | xor [reg64], r/m64, reg64 | xor [reg16], r/m16, imm8 | xor [reg32], r/m32, imm8 | xor [reg64], r/m64, imm8 | xor [reg8], r/m8, imm8 | xor [reg16], r/m16, imm16 | xor [reg32], r/m32, imm32 | xor [reg64], r/m64, imm32 | xor kreg8, kreg8, kreg8 | xor kreg16, kreg16, kreg16 | xor kreg32, kreg32, kreg32 | xor kreg64, kreg64, kreg64 XOR performs a bitwise XOR operation between its two operands
(i.e. each bit of the result is 1 if and only if exactly one of the
corresponding bits of the two inputs was 1), and stores the result
in the destination (first) operand.
In the forms with an 8-bit immediate second operand and a longer
first operand, the second operand is considered to be signed, and is
sign-extended to the length of the first operand. In these cases,
the BYTE qualifier is necessary to force NASM to generate this
form of the instruction.
The MMX instruction PXOR (see PXOR) performs the same
operation on the 64-bit MMX registers.
