public override ECPoint Twice()
{
if (base.IsInfinity)
{
return(this);
}
ECCurve curve = Curve;
SecP160R2FieldElement secP160R2FieldElement = (SecP160R2FieldElement)base.RawYCoord;
if (secP160R2FieldElement.IsZero)
{
return(curve.Infinity);
}
SecP160R2FieldElement secP160R2FieldElement2 = (SecP160R2FieldElement)base.RawXCoord;
SecP160R2FieldElement secP160R2FieldElement3 = (SecP160R2FieldElement)base.RawZCoords[0];
uint[] array = Nat160.Create();
uint[] array2 = Nat160.Create();
uint[] array3 = Nat160.Create();
SecP160R2Field.Square(secP160R2FieldElement.x, array3);
uint[] array4 = Nat160.Create();
SecP160R2Field.Square(array3, array4);
bool isOne = secP160R2FieldElement3.IsOne;
uint[] array5 = secP160R2FieldElement3.x;
if (!isOne)
{
array5 = array2;
SecP160R2Field.Square(secP160R2FieldElement3.x, array5);
}
SecP160R2Field.Subtract(secP160R2FieldElement2.x, array5, array);
uint[] array6 = array2;
SecP160R2Field.Add(secP160R2FieldElement2.x, array5, array6);
SecP160R2Field.Multiply(array6, array, array6);
uint x = Nat160.AddBothTo(array6, array6, array6);
SecP160R2Field.Reduce32(x, array6);
uint[] array7 = array3;
SecP160R2Field.Multiply(array3, secP160R2FieldElement2.x, array7);
x = Nat.ShiftUpBits(5, array7, 2, 0u);
SecP160R2Field.Reduce32(x, array7);
x = Nat.ShiftUpBits(5, array4, 3, 0u, array);
SecP160R2Field.Reduce32(x, array);
SecP160R2FieldElement secP160R2FieldElement4 = new SecP160R2FieldElement(array4);
SecP160R2Field.Square(array6, secP160R2FieldElement4.x);
SecP160R2Field.Subtract(secP160R2FieldElement4.x, array7, secP160R2FieldElement4.x);
SecP160R2Field.Subtract(secP160R2FieldElement4.x, array7, secP160R2FieldElement4.x);
SecP160R2FieldElement secP160R2FieldElement5 = new SecP160R2FieldElement(array7);
SecP160R2Field.Subtract(array7, secP160R2FieldElement4.x, secP160R2FieldElement5.x);
SecP160R2Field.Multiply(secP160R2FieldElement5.x, array6, secP160R2FieldElement5.x);
SecP160R2Field.Subtract(secP160R2FieldElement5.x, array, secP160R2FieldElement5.x);
SecP160R2FieldElement secP160R2FieldElement6 = new SecP160R2FieldElement(array6);
SecP160R2Field.Twice(secP160R2FieldElement.x, secP160R2FieldElement6.x);
if (!isOne)
{
SecP160R2Field.Multiply(secP160R2FieldElement6.x, secP160R2FieldElement3.x, secP160R2FieldElement6.x);
}
return(new SecP160R2Point(curve, secP160R2FieldElement4, secP160R2FieldElement5, new ECFieldElement[1]
{
secP160R2FieldElement6
}, base.IsCompressed));
}
