Check if a number x is positive (x>0) by ONLY using bitwise operators in C

Question

isPositive - return true if x > 0, otherwise false

Example: isPositive(-1)

Legal ops:

Answer 1

Why not use XOR (^)?

Try this,

{
    return ((x>>31)&1)^(!!x); 
}

It can deal with the 0 case well.