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Smaller optimizations. Division by zero fixed?

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mlemanczyk committed 2025-10-17 14:18:49 +02:00
1 parent 5fcd082fff
commit 43cf4a978f
3 files changed
+55 -46
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PerfectNumbers.Core/ULongExtensions.cs
+6 -5
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@@ -330,11 +330,12 @@ public static class ULongExtensions
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static ulong Pow2MontgomeryModWindowedCpu(this ulong exponent, in MontgomeryDivisorData divisor, bool keepMontgomery)
{
ulong modulus = divisor.Modulus;
if (exponent == 0UL)
{
return keepMontgomery ? divisor.MontgomeryOne : 1UL % modulus;
}
ulong modulus = divisor.Modulus;
// This should never happen in production code. If it does, we need to fix it.
// if (exponent == 0UL)
// {
// return keepMontgomery ? divisor.MontgomeryOne : 1UL % modulus;
// }
if (exponent <= Pow2WindowFallbackThreshold)
{