internal F2mPoint SubtractSimple(
F2mPoint b)
{
if (b.IsInfinity)
{
return(this);
}
return(AddSimple((F2mPoint)b.Negate()));
}
/**
* Subtracts another <code>ECPoints.F2m</code> from <code>this</code>
* without checking if both points are on the same curve. Used by
* multiplication algorithms, because there all points are a multiple
* of the same point and hence the checks can be omitted.
* @param b The other <code>ECPoints.F2m</code> to subtract from
* <code>this</code>.
* @return <code>this - b</code>
*/
internal F2mPoint SubtractSimple(
F2mPoint b)
{
if (b.IsInfinity)
return this;
// Add -b
return AddSimple((F2mPoint) b.Negate());
}
