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Refine GPU residue prime tables

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Marek Lemańczyk committed 2025-09-17 17:35:26 +02:00
1 parent 88d0c9c271
commit 34cc0b0fdd
5 files changed
+209 -99
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PerfectNumbers.Core/Gpu/MersenneNumberResidueGpuTester.cs
+2 -2
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@@ -18,7 +18,7 @@ public class MersenneNumberResidueGpuTester(bool useGpuOrder)
var accelerator = gpuLease.Accelerator;
// Ensure device has small cycles and primes tables for in-kernel lookup
var smallCyclesView = GpuKernelPool.EnsureSmallCyclesOnDevice(accelerator);
var (smallPrimesView, smallPrimesPow2View) = GpuKernelPool.EnsureSmallPrimesOnDevice(accelerator);
ResiduePrimeViews primeViews = GpuKernelPool.EnsureSmallPrimesOnDevice(accelerator);
int batchSize = GpuConstants.ScanBatchSize;
UInt128 kStart = 1UL;
byte last = lastIsSeven ? (byte)1 : (byte)0;
@@ -56,7 +56,7 @@ public class MersenneNumberResidueGpuTester(bool useGpuOrder)
var ra = new ResidueAutomatonArgs(q0m10, step10, q0m8, step8, q0m3, step3, q0m5, step5);
kernel(currentSize, exponent, twoPGpu, (GpuUInt128)kStart, last, 0UL,
ra, orderBuffer.View, smallCyclesView, smallPrimesView, smallPrimesPow2View);
ra, orderBuffer.View, smallCyclesView, primeViews.LastOne, primeViews.LastSeven, primeViews.LastOnePow2, primeViews.LastSevenPow2);
accelerator.Synchronize();
orderBuffer.View.CopyToCPU(ref MemoryMarshal.GetReference(orders), currentSize);