What is the meaning of XOR in x86 assembly?

Question

I\'m getting into assembly and I keep running into xor, for example:

xor     ax, ax

Does it just clear the register\'s value?

Answer 1

In this case it will clear the register... XOR is an "exclusive or"... so if ax contains 1010 and you exclusive or that with 1010 you'll get 0000 (cleared)