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Refactor GPU-compatible Mul64 handling

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Marek Lemańczyk committed 2025-09-29 22:35:46 +02:00
1 parent b677e6cdec
commit f63254f0f0
4 files changed
+191 -12
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PerfectNumbers.Core/Gpu/GpuUInt128.cs
+12 -6
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@@ -19,6 +19,13 @@ public struct GpuUInt128 : IComparable<GpuUInt128>, IEquatable<GpuUInt128>
Low = low;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public GpuUInt128(ulong low)
{
High = 0UL;
Low = low;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public GpuUInt128(UInt128 value)
{
@@ -36,7 +43,7 @@ public struct GpuUInt128 : IComparable<GpuUInt128>, IEquatable<GpuUInt128>
public static implicit operator GpuUInt128(UInt128 value) => new(value);
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static implicit operator GpuUInt128(ulong value) => new(0UL, value);
public static implicit operator GpuUInt128(ulong value) => new(value);
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static implicit operator UInt128(GpuUInt128 value) =>
@@ -395,13 +402,12 @@ public struct GpuUInt128 : IComparable<GpuUInt128>, IEquatable<GpuUInt128>
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public readonly GpuUInt128 Mul64(GpuUInt128 other)
public void Mul64(GpuUInt128 other)
{
// Multiply this.Low (assumed 64-bit value) by full 128-bit other
ulong a = Low;
ulong low = a * other.Low;
ulong high = a * other.High + MulHigh(a, other.Low);
return new(high, low);
ulong operand = Low;
Low = operand * other.Low;
High = operand * other.High + MulHigh(operand, other.Low);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]