public void ArtanhTest()
{
for (Int64 i = -99; i <= 99; i++)
{
MultiPrecision <Pow2.N8> x = (MultiPrecision <Pow2.N8>)i / 100;
MultiPrecision <Pow2.N8> y = MultiPrecision <Pow2.N8> .Artanh(x);
Console.WriteLine(x);
Console.WriteLine(y);
TestTool.Tolerance(Math.Atanh((double)x), y);
}
}
public void ArtanhUnnormalValueTest()
{
MultiPrecision <Pow2.N8>[] vs = new MultiPrecision <Pow2.N8>[] {
MultiPrecision <Pow2.N8> .NaN,
MultiPrecision <Pow2.N8> .BitDecrement(-1),
MultiPrecision <Pow2.N8> .BitIncrement(1),
MultiPrecision <Pow2.N8> .PositiveInfinity,
MultiPrecision <Pow2.N8> .NegativeInfinity,
};
foreach (MultiPrecision <Pow2.N8> v in vs)
{
MultiPrecision <Pow2.N8> y = MultiPrecision <Pow2.N8> .Artanh(v);
Assert.IsTrue(y.IsNaN);
}
}
public void ArtanhBorderTest()
{
MultiPrecision <Pow2.N8>[] borders = new MultiPrecision <Pow2.N8>[] { -1, 0, 1 };
foreach (MultiPrecision <Pow2.N8> b in borders)
{
List <MultiPrecision <Pow2.N8> > ys = new();
foreach (MultiPrecision <Pow2.N8> x in TestTool.EnumerateNeighbor(b))
{
if (x < -1 || x > 1)
{
continue;
}
MultiPrecision <Pow2.N8> y = MultiPrecision <Pow2.N8> .Artanh(x);
ys.Add(y);
Console.WriteLine(x);
Console.WriteLine(x.ToHexcode());
Console.WriteLine(y);
Console.WriteLine(y.ToHexcode());
Console.Write("\n");
if (Math.Abs((double)x) == 1)
{
continue;
}
TestTool.Tolerance(Math.Atanh((double)x), y, ignore_expected_nan: true);
}
TestTool.SmoothnessSatisfied(ys, b == 0 ? 0.5 : 2);
TestTool.MonotonicitySatisfied(ys);
Console.Write("\n");
}
}
