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

if your working with a number system that uses the MSB as the signage bit, you can do:

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