GetDoubleFromParts()

static double System.Numerics.NumericsHelpers.GetDoubleFromParts ( int sign, int exp, ulong man )

inlinestatic

Definition at line 36 of file NumericsHelpers.cs.

    {
        Unsafe.SkipInit(out DoubleUlong doubleUlong);
        doubleUlong.dbl = 0.0;
        if (man == 0L)
        {
            doubleUlong.uu = 0uL;
        }
        else
        {
            int num = CbitHighZero(man) - 11;
            man = ((num >= 0) ? (man << num) : (man >> -num));
            exp -= num;
            exp += 1075;
            if (exp >= 2047)
            {
                doubleUlong.uu = 9218868437227405312uL;
            }
            else if (exp <= 0)
            {
                exp--;
                if (exp < -52)
                {
                    doubleUlong.uu = 0uL;
                }
                else
                {
                    doubleUlong.uu = man >> -exp;
                }
            }
            else
            {
                doubleUlong.uu = (man & 0xFFFFFFFFFFFFFuL) | (ulong)((long)exp << 52);
            }
        }
        if (sign < 0)
        {
            doubleUlong.uu |= 9223372036854775808uL;
        }
        return doubleUlong.dbl;
    }

References System.Numerics.NumericsHelpers.CbitHighZero(), and System.L.

Referenced by System.Numerics.BigInteger.operator double().