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% 10 operations replaces with UInt128/ulong.Mod10 methods

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Marek Lemańczyk committed 2025-09-21 07:42:25 +02:00
1 parent 3e0102a404
commit 412ce4fd50
13 files changed
+256 -195
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PerfectNumbers.Core/Gpu/GpuKernelPool.cs
+5 -5
View File
@@ -201,8 +201,8 @@ public ref struct GpuKernelLease(IDisposable limiter, GpuContextLease gpu, Kerne
{
ulong idx = (ulong)index.X;
// residue automaton
ulong step10 = ((exponent % 10UL) << 1) % 10UL;
ulong r10 = q0m10 + (step10 * idx) % 10UL;
ulong step10 = (exponent.Mod10() << 1).Mod10();
ulong r10 = q0m10 + (step10 * idx).Mod10();
r10 -= (r10 >= 10UL) ? 10UL : 0UL;
bool shouldCheck = r10 != 5UL; // skip q ≡ 5 (mod 10); other residues handled by r8/r3/r5
if (shouldCheck)
@@ -358,7 +358,7 @@ public ref struct GpuKernelLease(IDisposable limiter, GpuContextLease gpu, Kerne
ArrayView1D<ulong, Stride1D.Dense> smallPrimesPow2LastSeven)
{
ulong idx = (ulong)index.X;
ulong r10 = ra.Q0M10 + (ra.Step10 * idx) % 10UL; r10 -= (r10 >= 10UL) ? 10UL : 0UL;
ulong r10 = ra.Q0M10 + (ra.Step10 * idx).Mod10(); r10 -= (r10 >= 10UL) ? 10UL : 0UL;
bool shouldCheck = r10 != 5UL;
if (shouldCheck)
{
@@ -489,7 +489,7 @@ public ref struct GpuKernelLease(IDisposable limiter, GpuContextLease gpu, Kerne
ResidueAutomatonArgs ra, ArrayView<int> found, ArrayView1D<uint, Stride1D.Dense> smallCycles)
{
ulong idx = (ulong)index.X;
ulong r10 = ra.Q0M10 + (ra.Step10 * idx) % 10UL; r10 -= (r10 >= 10UL) ? 10UL : 0UL;
ulong r10 = ra.Q0M10 + (ra.Step10 * idx).Mod10(); r10 -= (r10 >= 10UL) ? 10UL : 0UL;
bool shouldCheck = r10 != 5UL;
if (shouldCheck)
{
@@ -573,7 +573,7 @@ public ref struct GpuKernelLease(IDisposable limiter, GpuContextLease gpu, Kerne
ResidueAutomatonArgs ra, ArrayView<int> found, ArrayView1D<uint, Stride1D.Dense> smallCycles)
{
ulong idx = (ulong)index.X;
ulong r10 = ra.Q0M10 + (ra.Step10 * idx) % 10UL; r10 -= (r10 >= 10UL) ? 10UL : 0UL;
ulong r10 = ra.Q0M10 + (ra.Step10 * idx).Mod10(); r10 -= (r10 >= 10UL) ? 10UL : 0UL;
bool shouldCheck = r10 != 5UL;
if (shouldCheck)
{