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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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PerfectNumbers.Core/Gpu/MersenneNumberDivisorByDivisorGpuTester.cs
+8 -11
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@@ -259,7 +259,8 @@ public sealed class MersenneNumberDivisorByDivisorGpuTester : IMersenneNumberDiv
{
ulong divisorValue = filteredDivisorsSpan[i];
GpuDivisorPartialData divisorDataValue = GpuDivisorPartialData.Create(divisorValue);
ulong divisorCycle = ResolveDivisorCycle(divisorValue, prime, divisorDataValue);
MontgomeryDivisorData montgomeryData = MontgomeryDivisorData.FromModulus(divisorValue);
ulong divisorCycle = ResolveDivisorCycle(divisorValue, prime, in montgomeryData);
if (divisorCycle != prime)
{
continue;
@@ -305,11 +306,11 @@ public sealed class MersenneNumberDivisorByDivisorGpuTester : IMersenneNumberDiv
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
private static ulong ResolveDivisorCycle(ulong divisor, ulong prime, in GpuDivisorPartialData divisorData)
private static ulong ResolveDivisorCycle(ulong divisor, ulong prime, in MontgomeryDivisorData divisorData)
{
if (!MersenneDivisorCycles.TryCalculateCycleLengthForExponentGpu(divisor, prime, divisorData, out ulong computedCycle, out bool primeOrderFailed) || computedCycle == 0UL)
if (!MersenneDivisorCycles.TryCalculateCycleLengthForExponentCpu(divisor, prime, divisorData, out ulong computedCycle, out bool primeOrderFailed) || computedCycle == 0UL)
{
return MersenneDivisorCycles.CalculateCycleLengthGpu(divisor, divisorData, skipPrimeOrderHeuristic: primeOrderFailed);
return MersenneDivisorCycles.CalculateCycleLength(divisor, divisorData, skipPrimeOrderHeuristic: primeOrderFailed);
}
return computedCycle;
@@ -459,20 +460,16 @@ public sealed class MersenneNumberDivisorByDivisorGpuTester : IMersenneNumberDiv
// return;
// }
GpuDivisorPartialData cachedData = GpuDivisorPartialData.FromMontgomery(divisorData);
if (cachedData.Modulus != divisor)
{
cachedData = GpuDivisorPartialData.Create(divisor);
}
GpuDivisorPartialData cachedData = GpuDivisorPartialData.Create(divisor);
ulong cycle = divisorCycle;
ulong firstPrime = primes[0];
if (cycle == 0UL)
{
if (!MersenneDivisorCycles.TryCalculateCycleLengthForExponentGpu(divisor, firstPrime, cachedData, out ulong computedCycle, out bool primeOrderFailed) || computedCycle == 0UL)
if (!MersenneDivisorCycles.TryCalculateCycleLengthForExponentCpu(divisor, firstPrime, divisorData, out ulong computedCycle, out bool primeOrderFailed) || computedCycle == 0UL)
{
cycle = MersenneDivisorCycles.CalculateCycleLengthGpu(divisor, cachedData, skipPrimeOrderHeuristic: primeOrderFailed);
cycle = MersenneDivisorCycles.CalculateCycleLength(divisor, divisorData, skipPrimeOrderHeuristic: primeOrderFailed);
}
else
{