How to add even parity bit on 7-bit binary number

Question

I am continuing from my previous question. I am making a c# program where the user enters a 7-bit binary number and the computer prints out the number with an even parity bit to

Answer 1

Almost the same process, only much faster on a larger number of bits. Using only the arithmetic operators (SHR && XOR), without loops:

public static bool is_parity(int data)
{
    //data ^= data >> 32; // if arg >= 64-bit (notice argument length)
    //data ^= data >> 16; // if arg >= 32-bit 
    //data ^= data >> 8;  // if arg >= 16-bit
    data ^= data >> 4;
    data ^= data >> 2;
    data ^= data >> 1;
    return (data & 1) !=0;
}

public static byte fix_parity(byte data)
{
    if (is_parity(data)) return data;
    return (byte)(data ^ 128);
}