How to manually (bitwise) perform (float)x?

Question

Now, here is the function header of the function I\'m supposed to implement:

/*
 * float_from_int - Return bit-level equivalent of expression (float) x
 *            


        

Answer 1

Dealing with 0x80000000 is pretty easy:

int xIsNegative = 0;  
unsigned int absValOfX = x;  

if (x < 0)
{  
    xIsNegative = 1;  
    absValOfX = -(unsigned int)x;  
}

It gets rid of special casing -2147483648 since that value is representable as an unsigned value, and absValOfX should always be positive.