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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/GpuKernelPool.cs
+12 -4
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@@ -241,7 +241,9 @@ public ref struct GpuKernelLease(IDisposable limiter, GpuContextLease gpu, Kerne
}
GpuUInt128 k = kStart + (GpuUInt128)idx;
GpuUInt128 q = twoP.Mul64(k) + GpuUInt128.One;
GpuUInt128 q = twoP;
q.Mul64(k);
q.Add(GpuUInt128.One);
// Small-cycles in-kernel early rejection from device table
if (q.High == 0UL && q.Low < (ulong)smallCycles.Length)
@@ -395,7 +397,9 @@ public ref struct GpuKernelLease(IDisposable limiter, GpuContextLease gpu, Kerne
}
GpuUInt128 k = kStart + (GpuUInt128)idx;
GpuUInt128 q = twoP.Mul64(k) + GpuUInt128.One;
GpuUInt128 q = twoP;
q.Mul64(k);
q.Add(GpuUInt128.One);
if (q.High == 0UL && q.Low < (ulong)smallCycles.Length)
{
ulong cycle = smallCycles[(int)q.Low];
@@ -539,7 +543,9 @@ public ref struct GpuKernelLease(IDisposable limiter, GpuContextLease gpu, Kerne
}
GpuUInt128 k = kStart + (GpuUInt128)idx;
GpuUInt128 q = twoP.Mul64(k) + GpuUInt128.One;
GpuUInt128 q = twoP;
q.Mul64(k);
q.Add(GpuUInt128.One);
// Small-cycles in-kernel early rejection from device table
if (q.High == 0UL && q.Low < (ulong)smallCycles.Length)
@@ -621,7 +627,9 @@ public ref struct GpuKernelLease(IDisposable limiter, GpuContextLease gpu, Kerne
}
GpuUInt128 k = kStart + (GpuUInt128)idx;
GpuUInt128 q = twoP.Mul64(k) + GpuUInt128.One;
GpuUInt128 q = twoP;
q.Mul64(k);
q.Add(GpuUInt128.One);
// Small-cycles in-kernel early rejection from device table
if (q.High == 0UL && q.Low < (ulong)smallCycles.Length)
{