Implementing Logical Right Shift in C

Question

I\'m working on making a logical right shift function in C using only bitwise operators. Here\'s what I have:

int logical_right_shift(int x, int n)
{
    int         


        

Answer 1

Derived from php's implementation of logical right shifting

function logical_right_shift( i , shift ) {

    if( i & 2147483648 ) {
        return ( i >> shift ) ^ ( 2147483648 >> ( shift - 1 ) );
    }

    return i >> shift;
}

For 32bit platforms only.

Answer 2

int logicalShift(int x, int n) {
  int mask = x>>31<<31>>(n)<<1;
  return mask^(x>>n);
}

Only for 32 bits