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Fix GPU mul mod benchmark kernel initialization

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Marek Lemańczyk committed 2025-10-24 22:08:32 +02:00
1 parent e566339f09
commit d0ba08dd24
1 file changed
+3 -15
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PerfectNumbers.Core/Gpu/GpuUInt128.cs
+3 -15
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@@ -11,9 +11,7 @@ public struct GpuUInt128 : IComparable<GpuUInt128>, IEquatable<GpuUInt128>
private const int NativeModuloChunkBits = 8; private const int NativeModuloChunkBits = 8;
private const int NativeModuloChunkBitsMinusOne = NativeModuloChunkBits - 1; private const int NativeModuloChunkBitsMinusOne = NativeModuloChunkBits - 1;
private const int NativeModuloBitMaskTableSize = 1024;
private const ulong NativeModuloChunkMask = (1UL << NativeModuloChunkBits) - 1UL; private const ulong NativeModuloChunkMask = (1UL << NativeModuloChunkBits) - 1UL;
private static readonly ulong[] NativeModuloBitMasks = CreateNativeModuloBitMasks();
private const int Pow2WindowSizeBits = 8; private const int Pow2WindowSizeBits = 8;
private const int Pow2WindowOddPowerCount = 1 << (Pow2WindowSizeBits - 1); private const int Pow2WindowOddPowerCount = 1 << (Pow2WindowSizeBits - 1);
@@ -1028,10 +1026,10 @@ public struct GpuUInt128 : IComparable<GpuUInt128>, IEquatable<GpuUInt128>
private static ulong MultiplyChunkModulo(ulong value, ulong chunk, ulong modulus) private static ulong MultiplyChunkModulo(ulong value, ulong chunk, ulong modulus)
{ {
ulong result = 0UL; ulong result = 0UL;
ulong[] nativeModuloBitMasks = NativeModuloBitMasks; ulong bitMask = 1UL;
for (int bit = 0; bit < NativeModuloChunkBits; bit++) for (int bit = 0; bit < NativeModuloChunkBits; bit++, bitMask <<= 1)
{ {
if ((chunk & nativeModuloBitMasks[bit]) != 0UL) if ((chunk & bitMask) != 0UL)
{ {
result = (result + value) % modulus; result = (result + value) % modulus;
} }
@@ -1548,16 +1546,6 @@ public struct GpuUInt128 : IComparable<GpuUInt128>, IEquatable<GpuUInt128>
high = hi; high = hi;
} }
private static ulong[] CreateNativeModuloBitMasks()
{
ulong[] masks = new ulong[NativeModuloBitMaskTableSize];
for (int bit = 0; bit < NativeModuloBitMaskTableSize; bit++)
{
masks[bit] = bit < 64 ? 1UL << bit : 0UL;
}
return masks;
}
} }
// TODO: Check if the TODO below is still relevant. // TODO: Check if the TODO below is still relevant.