mlemanczyk/even-perfect-numbers-scanner
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Replace small-modulo uses with optimized helpers

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Marek Lemańczyk committed 2025-09-22 19:54:50 +02:00
1 parent ca866ffc5b
commit 3598f88aaf
9 files changed
+46 -38
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PerfectNumbers.Core/Gpu/MersenneNumberOrderGpuTester.cs
+4 -4
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@@ -27,10 +27,10 @@ public class MersenneNumberOrderGpuTester(GpuKernelType kernelType, bool useGpuO
var foundBuffer = accelerator.Allocate1D<int>(1);
UInt128 exponent128 = exponent;
exponent128.Mod10_8_5_3(out ulong exponentMod10, out ulong exponentMod8, out ulong exponentMod5, out ulong exponentMod3);
ulong step10 = (exponentMod10 << 1) % 10UL;
ulong step8 = (exponentMod8 << 1) & 7UL;
ulong step3 = (exponentMod3 << 1) % 3UL;
ulong step5 = (exponentMod5 << 1) % 5UL;
ulong step10 = (exponentMod10 << 1).Mod10();
ulong step8 = (exponentMod8 << 1) & 7UL;
ulong step3 = (exponentMod3 << 1).Mod3();
ulong step5 = (exponentMod5 << 1).Mod5();
try
{
UInt128 remaining;