assembler x=x

x=x
{
mov bx,x
mov ax,[bx]
mov [bx],ax
}


x=not(x)
{
mov bx,x
mov ax,[bx]
not ax
mov [bx],ax
}


x=not(not(x))
{
mov bx,x
mov ax,[bx]
not ax
not ax
mov [bx],ax
}