Same as
C
/ * + -
&& || !
~ & | ^
<<
?:
shr
sar
cmp
<
<=
>
>=
==
!=
===
!==
differs:
1’bx == 1’bx → 1’bx (有一个x/z则结果为x）
1’bx === 1’bx → 1’b1