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Feature: add unit testing for IAccelerator implementations #81

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Merged
IsaMorphic merged 1 commit into from
Mar 19, 2026
Merged

Feature: add unit testing for IAccelerator implementations #81

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57 changes: 57 additions & 0 deletions QuadrupleLib.Tests/Utilities/AcceleratorTests.cs
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Original file line number Diff line number Diff line change
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using QuadrupleLib.Accelerators;
using Xunit;

namespace QuadrupleLib.Tests.Utilities
{
public abstract class AcceleratorTests<TAccelerator>
where TAccelerator : IAccelerator
{
[Theory]
[InlineData(1UL, 0UL, 0UL, 0UL)]
[InlineData(1UL, 1UL, 1UL, 0UL)]
[InlineData(1UL, 2UL, 2UL, 0UL)]
[InlineData(4UL, 1UL << 63, 0UL, 2UL)]
public void IsBigMulCorrect(ulong a, ulong b, ulong expectedLo, ulong expectedHi)
{
ulong actualHi = TAccelerator.BigMul(a, b, out ulong actualLo);
Assert.Equal((expectedLo, expectedHi), (actualLo, actualHi));
}

[Theory]
[InlineData(2UL, 0UL, 1UL, 0UL, 2UL, 0UL)]
[InlineData(2UL, 0UL, 2UL, 0UL, 1UL, 0UL)]
[InlineData(0UL, 4UL, 2UL, 0UL, 0UL, 2UL)]
[InlineData(0UL, 4UL, 3UL, 0UL, 6148914691236517205UL, 1UL)]
public void IsDivRemQuotientCorrect(ulong aLo, ulong aHi, ulong bLo, ulong bHi, ulong expectedLo, ulong expectedHi)
{
UInt128 a = aLo | ((UInt128)aHi << 64);
UInt128 b = bLo | ((UInt128)bHi << 64);
UInt128 expected = expectedLo | ((UInt128)expectedHi << 64);

(UInt128 actual, UInt128 _) = TAccelerator.DivRem(a, b);
Assert.Equal(expected, actual);
}

[Theory]
[InlineData(2UL, 0UL, 1UL, 0UL, 0UL, 0UL)]
[InlineData(2UL, 0UL, 2UL, 0UL, 0UL, 0UL)]
[InlineData(0UL, 4UL, 2UL, 0UL, 0UL, 0UL)]
[InlineData(0UL, 4UL, 3UL, 0UL, 1UL, 0UL)]
public void IsDivRemRemainderCorrect(ulong aLo, ulong aHi, ulong bLo, ulong bHi, ulong expectedLo, ulong expectedHi)
{
UInt128 a = aLo | ((UInt128)aHi << 64);
UInt128 b = bLo | ((UInt128)bHi << 64);
UInt128 expected = expectedLo | ((UInt128)expectedHi << 64);

(UInt128 _, UInt128 actual) = TAccelerator.DivRem(a, b);
Assert.Equal(expected, actual);
}
}

public class AcceleratorTests_DefaultAccelerator :
AcceleratorTests<DefaultAccelerator> { }

public class AcceleratorTests_SoftwareAccelerator :
AcceleratorTests<SoftwareAccelerator>
{ }
}
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