using System;

​

public class Program

{

    public static void Main()

    {

        float value = halfToFloat(0x7c00);

        Console.WriteLine("Result passing 0x7C00:" + value);

    }

    static float halfToFloat(int hbits) {

        int mant = hbits & 0x03ff;            // 10 bits mantissa

        int exp = hbits & 0x7c00;            // 5 bits exponent

        int temp;

        if (exp == 0x7c00)                   // NaN/Inf

            exp = 0x3fc00;                    // -> NaN/Inf

        else if (exp != 0)                   // normalized value

        {

            exp += 0x1c000;                   // exp - 15 + 127

            if (mant == 0 && exp > 0x1c400) {  // smooth transition

                temp = (hbits & 0x8000) << 16 | exp << 13 | 0x3ff;

                return BitConverter.ToSingle(BitConverter.GetBytes(temp), 0);

            }

        }

        else if (mant != 0)                  // && exp==0 -> subnormal

        {

            exp = 0x1c400;                    // make it normal

            do

            {

                mant <<= 1;                   // mantissa * 2

                exp -= 0x400;                 // decrease exp by 1

            } while ((mant & 0x400) == 0); // while not normal

            mant &= 0x3ff;                    // discard subnormal bit

        }                                     // else +/-0 -> +/-0

​

        temp= (hbits & 0x8000) << 16 | (exp | mant) << 13;

        Console.WriteLine("INT:{0:x}" , temp);

        return BitConverter.ToSingle(BitConverter.GetBytes(temp), 0);

    }

}