mlemanczyk/even-perfect-numbers-scanner
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Cache GPU divisor partial data on GPU path

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Marek Lemańczyk committed 2025-10-24 18:56:21 +02:00
1 parent cc281ab423
commit 69acd3dad9
5 files changed
+71 -17
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PerfectNumbers.Core/Gpu/Kernels/DivisorByDivisorKernels.cs
+3 -3
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@@ -30,7 +30,7 @@ internal static class DivisorByDivisorKernels
public static void EvaluateDivisorWithStepperKernel(
Index1D _,
MontgomeryDivisorData divisor,
GpuDivisorPartialData divisor,
ulong divisorCycle,
ulong firstCycleRemainder,
ArrayView<ulong> exponents,
@@ -101,12 +101,12 @@ internal static class DivisorByDivisorKernels
hits[globalIndex] = montgomeryResult == 1UL ? (byte)1 : (byte)0;
}
public static void ComputeMontgomeryExponentKernel(Index1D index, MontgomeryDivisorData divisor, ArrayView<ulong> exponents, ArrayView<ulong> results)
public static void ComputeMontgomeryExponentKernel(Index1D index, GpuDivisorPartialData divisor, ArrayView<ulong> exponents, ArrayView<ulong> results)
{
ulong modulus = divisor.Modulus;
// Each divisor flowing through this kernel follows q = 2kp + 1 with k >= 1, so modulus is always odd and exceeds one.
ulong exponent = exponents[index];
ulong montgomeryResult = ULongExtensions.Pow2MontgomeryModWindowedGpuKeepMontgomery(divisor, exponent);
ulong montgomeryResult = ULongExtensions.Pow2MontgomeryModWindowedGpuKeepMontgomery(divisor.MontgomeryData, exponent);
results[index] = montgomeryResult;
}
}