protected override IDataItem TestFunc(IDataItem p1)
{
var u = p1.ToUInt32().Value;
var w = UBigInt.From(u);
return(new UBigIntDataItem(w));
}
private static void ニュートンラプソン法による逆数の計算(UBigInt v, int factor_v, out UBigInt xi, out int factor_x)
{
factor_x = factor_v + 1;
xi = (UBigInt.From(7U) << (factor_x - 1)).USubtruct((v << (factor_x - factor_v + 1)));
while (true)
{
var t = (UBigInt.One << (factor_v + factor_x + 1)).USubtruct(v * xi);
var xi_plus_1 = (xi * t) >> (factor_v + factor_x);
if (xi_plus_1 == xi)
{
break;
}
xi = xi_plus_1;
}
}
