# Bug fixed in commit 6a5cf0e5cbdf96464b17b9784c2b2fd9ff2bd3b9
#        !x & !!x should be 0, became !!x

T=d f ld mf li gi
V=x
R=-2, 2, 1
F=sub(  (!x & !!x) ,  (!x | !!x)  )
#C=-1
C=userDefFuncSub({  fp_and(fp_not(x), fp_notNot(x)),  fp_or(fp_not(x), fp_notNot(x)) })
