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Split GPU heuristic tables by scope

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Marek Lemańczyk committed 2025-11-01 09:22:44 +01:00
1 parent 936ce239db
commit 6027a73839
6 files changed
+574 -392
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PerfectNumbers.Core/Gpu/Kernels/PrimeTesterKernels.cs
+9 -8
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@@ -82,21 +82,22 @@ internal static class PrimeTesterKernels
Index1D index,
ArrayView<int> resultFlag,
ulong n,
ulong maxDivisorSquare,
ulong maxDivisor,
HeuristicGpuDivisorTableKind tableKind,
HeuristicGpuDivisorTables tables)
HeuristicGpuDivisorTables tables,
HeuristicGpuCombinedDivisorTables combinedTables)
{
byte nMod10 = (byte)(n % 10UL);
ArrayView1D<ulong, Stride1D.Dense> divisors = tables.SelectDivisors(tableKind, nMod10);
ArrayView1D<ulong, Stride1D.Dense> divisorSquares = tables.SelectDivisorSquares(tableKind, nMod10);
ArrayView1D<ulong, Stride1D.Dense> divisors = tableKind == HeuristicGpuDivisorTableKind.Combined
? combinedTables.SelectCombined(nMod10)
: tables.SelectDivisors(tableKind, nMod10);
int divisorLength = (int)divisorSquares.Length;
int divisorLength = (int)divisors.Length;
int threadIndex = index;
bool skipThread = threadIndex >= divisorLength;
ulong divisorSquare = skipThread ? 0UL : divisorSquares[threadIndex];
skipThread = skipThread | (divisorSquare > maxDivisorSquare);
ulong divisor = skipThread ? 1UL : divisors[threadIndex];
skipThread = skipThread | (divisor > maxDivisor);
ulong remainder = skipThread ? 1UL : n % divisor;
bool hasFactor = !skipThread & (remainder == 0UL);
if (hasFactor)