I60
(I61(a) == I61(b)) && (I60(a) == I60(b)))
(I61(a) != I61(b)) || (I60(a) != I60(b)))
#define IP6_ISZERO(a) ((I60(a) | I61(a) | I62(a) | I63(a)) == 0)
#define IP6_NOTZERO(a) ((I60(a) | I61(a) | I62(a) | I63(a)) != 0)
(I61(a) == 0xffffffff) && (I60(a) == 0xffffffff))
(((I60(a) & I60(m)) == I60(b)) && \
(((I60(a) & I60(m)) != I60(b)) || \