mlemanczyk/even-perfect-numbers-scanner
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Use LastDigit enum across Mersenne scanners

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Marek Lemańczyk committed 2025-10-26 16:04:05 +01:00
1 parent 43c7bafd5d
commit a83ae56caf
15 files changed
+83 -49
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PerfectNumbers.Core/Gpu/MersenneNumberIncrementalGpuTester.cs
+2 -2
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@@ -12,7 +12,7 @@ public class MersenneNumberIncrementalGpuTester(GpuKernelType kernelType, bool u
private readonly GpuKernelType _kernelType = kernelType;
private readonly bool _useGpuOrder = useGpuOrder;
public void Scan(ulong exponent, UInt128 twoP, bool lastIsSeven, UInt128 maxK, ref bool isPrime)
public void Scan(ulong exponent, UInt128 twoP, LastDigit lastDigit, UInt128 maxK, ref bool isPrime)
{
throw new NotImplementedException($"GPU incremental scanning requires the device cycle heuristics implementation (kernel: {_kernelType}, GPU order: {_useGpuOrder}).");
@@ -23,7 +23,7 @@ public class MersenneNumberIncrementalGpuTester(GpuKernelType kernelType, bool u
int batchSize = GpuConstants.ScanBatchSize; // large batch improves GPU occupancy
UInt128 kStart = 1UL;
ulong divMul = (ulong)((((UInt128)1 << 64) - UInt128.One) / exponent) + 1UL;
byte last = lastIsSeven ? (byte)1 : (byte)0; // ILGPU kernels do not support bool parameters
byte last = lastDigit == LastDigit.Seven ? (byte)1 : (byte)0; // ILGPU kernels do not support bool parameters
var pow2Kernel = gpuLease.Pow2ModKernel;
var incKernel = gpuLease.IncrementalKernel;
PerfectNumbers.Core/Gpu/MersenneNumberOrderGpuTester.cs
+2 -2
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@@ -7,7 +7,7 @@ public class MersenneNumberOrderGpuTester(GpuKernelType kernelType, bool useGpuO
private readonly GpuKernelType _kernelType = kernelType;
private readonly bool _useGpuOrder = useGpuOrder;
public void Scan(ulong exponent, UInt128 twoP, bool lastIsSeven, UInt128 maxK, ref bool isPrime)
public void Scan(ulong exponent, UInt128 twoP, LastDigit lastDigit, UInt128 maxK, ref bool isPrime)
{
var gpuLease = GpuKernelPool.GetKernel(_useGpuOrder);
var execution = gpuLease.EnterExecutionScope();
@@ -16,7 +16,7 @@ public class MersenneNumberOrderGpuTester(GpuKernelType kernelType, bool useGpuO
int batchSize = GpuConstants.ScanBatchSize; // large batch improves GPU occupancy and avoids TDR
UInt128 kStart = UInt128.One;
ulong divMul = (ulong)((((UInt128)1 << 64) - UInt128.One) / exponent) + 1UL;
byte last = lastIsSeven ? (byte)1 : (byte)0; // ILGPU kernels do not support bool parameters
byte last = lastDigit == LastDigit.Seven ? (byte)1 : (byte)0; // ILGPU kernels do not support bool parameters
var kernel = _kernelType switch
{
PerfectNumbers.Core/Gpu/MersenneNumberResidueGpuTester.cs
+2 -2
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@@ -24,7 +24,7 @@ public class MersenneNumberResidueGpuTester(bool useGpuOrder)
// requested by the caller, skip queuing additional block generation, and keep the snapshot cache untouched.
// GPU residue variant: check 2^p % q == 1 for q = 2*p*k + 1.
public void Scan(ulong exponent, UInt128 twoP, bool lastIsSeven, UInt128 maxK, ref bool isPrime)
public void Scan(ulong exponent, UInt128 twoP, LastDigit lastDigit, UInt128 maxK, ref bool isPrime)
{
var limiter = GpuPrimeWorkLimiter.Acquire();
var gpuLease = RentAccelerator();
@@ -46,7 +46,7 @@ public class MersenneNumberResidueGpuTester(bool useGpuOrder)
UInt128 kStart = 1UL;
UInt128 limit = maxK + UInt128.One;
byte last = lastIsSeven ? (byte)1 : (byte)0;
byte last = lastDigit == LastDigit.Seven ? (byte)1 : (byte)0;
twoP.Mod10_8_5_3(out ulong step10, out ulong step8, out ulong step5, out ulong step3);
step10 = step10.Mod10();