public void PositiveInfinityTest()
{
var number = double.PositiveInfinity;
Assert.IsTrue(double.IsInfinity(number));
var gama = Double754.FastInvSqrtDouble(number);
Assert.AreEqual(7.2178092426191764E-155, gama);
}
public void Sqrt256Test()
{
var number = 256.0;
Assert.AreEqual("1.0000000000000000 * 2^(8)", Double754.DoubleToString(number));
var gama = Double754.FastInvSqrtDouble(number);
Assert.AreEqual(0.0625, gama, 0.0025);
}
public void LargestNormalizedNumberSqrt()
{
var number = BitConverter.Int64BitsToDouble(0x7FEF_FFFF_FFFF_FFFFL);
Assert.AreEqual(1.7976931348623157E+308, number);
var gama = Double754.FastInvSqrtDouble(number);
Assert.AreEqual(7.2178092426191773E-155, gama);
}
public void Sqrt4Test()
{
var number = 4.0;
Assert.AreEqual("1.0000000000000000 * 2^(2)", Double754.DoubleToString(number));
var gama = Double754.FastInvSqrtDouble(number);
Assert.AreEqual(0.5, gama, 0.017);
}
public void Sqrt16Test()
{
var number = 16.0;
Assert.AreEqual("1.0000000000000000 * 2^(4)", Double754.DoubleToString(number));
var gama = Double754.FastInvSqrtDouble(number);
Assert.AreEqual(0.25, gama, 0.012);
}
public void Sqrt1Test()
{
var number = 1.0;
Assert.AreEqual("1.0000000000000000 * 2^(0)", Double754.DoubleToString(number));
var gama = Double754.FastInvSqrtDouble(number);
Assert.AreEqual(1.0, gama, 0.0323);
}
public void MiddleDenormalizedNumberSqrt()
{
var number = BitConverter.Int64BitsToDouble(0x0008_0000_0000_0000L);
Assert.AreEqual(1.1125369292536007E-308, number);
var gama = Double754.FastInvSqrtDouble(number);
Assert.AreEqual(7.9474781504737915E+153, gama);
}
public void SqrtQuarterTest()
{
var number = 0.25;
Assert.AreEqual("1.0000000000000000 * 2^(-2)", Double754.DoubleToString(number));
var gama = Double754.FastInvSqrtDouble(number);
Assert.AreEqual(2.0, gama, 0.065);
}
public void SqrtHalfTest()
{
var number = 0.5;
Assert.AreEqual("1.0000000000000000 * 2^(-1)", Double754.DoubleToString(number));
var gama = Double754.FastInvSqrtDouble(number);
Assert.AreEqual(1.414213562, gama, 0.022);
}
public void SqrtOneSixteenthTest()
{
var number = 0.0625;
Assert.AreEqual("1.0000000000000000 * 2^(-4)", Double754.DoubleToString(number));
var gama = Double754.FastInvSqrtDouble(number);
Assert.AreEqual(4.0, gama, 0.13);
}
public void SmallestNormalizedNumberSqrt()
{
var number = BitConverter.Int64BitsToDouble(0x0010_0000_0000_0000L);
Assert.AreEqual(2.2250738585072014E-308, number);
var gama = Double754.FastInvSqrtDouble(number);
Assert.AreEqual(6.4877030621011327E+153, gama);
}
public void LargestDenormalizedNumberSqrt()
{
var number = BitConverter.Int64BitsToDouble(0x000F_FFFF_FFFF_FFFFL);
Assert.AreEqual(2.2250738585072009E-308, number);
var gama = Double754.FastInvSqrtDouble(number);
Assert.AreEqual(6.4877030621011334E+153, gama);
}
public void NotANumberTest()
{
var number = double.NaN;
Assert.IsTrue(double.IsNaN(number));
var gama = Double754.FastInvSqrtDouble(number);
Assert.AreEqual(1.1299430132959441E+154, gama);
}
public void Sqrt2Test()
{
var number = 2.0;
Assert.AreEqual("1.0000000000000000 * 2^(1)", Double754.DoubleToString(number));
var gama = Double754.FastInvSqrtDouble(number);
Assert.AreEqual(0.7071067811, gama, 0.011);
}
public void SmallestDenormalizedNumberSqrt()
{
var number = BitConverter.Int64BitsToDouble(0x0000_0000_0000_0001L);
Assert.AreEqual(4.9406564584124654E-324, number);
var gama = Double754.FastInvSqrtDouble(number);
Assert.AreEqual(9.6234541417166161E+153, gama);
}
public void ZeroSqrt()
{
var number = 0.0;
var bits = Double754.DoubleToString(number);
Assert.AreEqual("0.0000000000000000 * 2^(-1022)", bits);
var gama = Double754.FastInvSqrtDouble(number);
Assert.AreEqual(9.6234541417166161E+153, gama);
}
public void Test()
{
var number = 256.0;
Assert.AreEqual("1.0000000000000000 * 2^(8)", Double754.DoubleToString(number));
var gama = Double754.FastInvSqrtDouble(number);
Assert.AreEqual("1.0000000000000000 * 2^(-4)", Double754.DoubleToString(0.0625));
var y = BitConverter.Int64BitsToDouble(0x5FE6F7CED9168800L);
Assert.AreEqual("1.4355000000000473 * 2^(511)", Double754.DoubleToString(y));
Assert.AreEqual("1.9355000000000473 * 2^(-5)", Double754.DoubleToString(gama));
Assert.AreEqual(0.0625, gama, 0.01);
}