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Small improvement in Sum

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Darth Affe 2024-07-11 00:19:23 +02:00
parent 9f313f77fb
commit 225250bb33
1 changed files with 3 additions and 2 deletions
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5
HPPH/PixelHelper.Sum.cs
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@ -211,11 +211,12 @@ public static unsafe partial class PixelHelper
4, 0
];
Vector256<int> controlVector = Vector256.LoadUnsafe(ref MemoryMarshal.GetReference(avx2ControlData));
Vector256<long> rgbaSum64 = Vector256<long>.Zero;
ReadOnlySpan<byte> dataBytes = MemoryMarshal.AsBytes(data);
fixed (byte* bytePtr = dataBytes)
fixed (int* controlPtr = avx2ControlData)
fixed (byte* maskPtr = avx2ShuffleMask)
{
Vector256<byte> avx2ShuffleMaskVector = Avx2.BroadcastVector128ToVector256(maskPtr);
@ -224,7 +225,7 @@ public static unsafe partial class PixelHelper
{
Vector256<byte> chunk = Vector256.Load(bytePtr + (i * 4));
Vector256<byte> deinterleaved = Avx2.Shuffle(chunk, avx2ShuffleMaskVector);
Vector256<int> deinterleaved2 = Avx2.PermuteVar8x32(deinterleaved.AsInt32(), Vector256.Load(controlPtr));
Vector256<int> deinterleaved2 = Avx2.PermuteVar8x32(deinterleaved.AsInt32(), controlVector);
Vector256<long> sum = Avx2.SumAbsoluteDifferences(deinterleaved2.AsByte(), Vector256<byte>.Zero).AsInt64();
rgbaSum64 = Avx2.Add(rgbaSum64, sum);
}