Remove Montgomery data from GPU divisor flow

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Marek Lemańczyk committed 2025-10-24 18:56:28 +02:00
1 parent 69acd3dad9
commit 46a2178d65
4 files changed
+11 -152

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@@ -83,30 +83,4 @@ internal static class DivisorByDivisorKernels
}
}
public static void ConvertMontgomeryResultsToHitsKernel(
Index1D index,
ArrayView<ulong> results,
ArrayView<byte> hits)
{
int globalIndex = index;
// EvenPerfectBitScanner launches this kernel with an extent matching the result and hit spans,
// so the defensive bounds guard stays commented out to keep the conversion branch-free.
// int length = (int)results.Length;
// if (globalIndex >= length)
// {
// return;
// }
ulong montgomeryResult = results[globalIndex];
hits[globalIndex] = montgomeryResult == 1UL ? (byte)1 : (byte)0;
}
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.MontgomeryData, exponent);
results[index] = montgomeryResult;
}
}