private bool AbsLessThenMin(MbfFloat minValue)
{
if (Exponent != minValue.Exponent)
{
return(Exponent < minValue.Exponent);
}
return(Mantissa < minValue.Mantissa);
}
private bool AbsGreaterThenMax(MbfFloat maxValue)
{
if (Exponent != maxValue.Exponent)
{
return(Exponent > maxValue.Exponent);
}
return(Mantissa > maxValue.Mantissa);
}
public void Add(MbfFloat right, bool normalize = true)
{
if (right.IsZero)
{
return;
}
if (IsZero)
{
Mantissa = right.Mantissa;
Exponent = right.Exponent;
IsNegitive = right.IsNegitive;
return;
}
// ensure right has largest exponent
if (Exponent > right.Exponent)
{
var temp = ToMbfFloat();
Mantissa = right.Mantissa;
Exponent = right.Exponent;
IsNegitive = right.IsNegitive;
right = temp;
}
// denormalise left to match exponents
while (Exponent < right.Exponent)
{
Exponent += 1;
Mantissa >>= 1;
}
// add mantissas, taking sign into account
if (IsNegitive == right.IsNegitive)
{
Mantissa += right.Mantissa;
}
else
{
if (Mantissa > right.Mantissa)
{
Mantissa -= right.Mantissa;
}
else
{
Mantissa = right.Mantissa - Mantissa;
IsNegitive = right.IsNegitive;
}
}
if (normalize)
{
Normalize();
}
}
protected bool Equals(MbfFloat mbf)
{
if (IsZero)
{
return(mbf.IsZero);
}
return(mbf.IsNegitive == IsNegitive &&
mbf.Exponent == Exponent &&
mbf.Mantissa == Mantissa);
}
public MbfFloatParser(MbfFloat fp)
: this(fp is MbfDouble)
{
if (fp == null)
{
throw new ArgumentNullException(nameof(fp));
}
Mantissa = fp.Mantissa;
Exponent = fp.Exponent;
IsNegitive = fp.IsNegitive;
}
public void Divide(MbfFloat right)
{
if (right.IsZero)
{
var max = IsDouble ? (MbfFloat)MbfDouble.Max : MbfSingle.Max;
Exponent = max.Exponent;
Mantissa = max.Exponent;
throw new DivideByZeroException();
}
if (IsZero)
{
return;
}
// signs
IsNegitive = IsNegitive != right.IsNegitive;
// subtract exponentials
Exponent -= (byte)(right.Exponent - right.MbfBias - 8);
// long division of mantissas
var leftMantissa = Mantissa;
var rightMantissa = right.Mantissa;
Mantissa = 0;
Exponent += 1;
while (rightMantissa > 0)
{
Mantissa <<= 1;
Exponent -= 1;
if (leftMantissa > rightMantissa)
{
leftMantissa -= rightMantissa;
Mantissa += 1;
}
rightMantissa >>= 1;
}
Normalize();
}
