From 110ff3d9e8f9651d73286576e17f69f1e2ecfa31 Mon Sep 17 00:00:00 2001
From: Brian Popow <38701097+brianpopow@users.noreply.github.com>
Date: Wed, 24 Nov 2021 12:38:44 +0100
Subject: [PATCH] Avoid using Span<int> tmp
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Co-authored-by: Günther Foidl <gue@korporal.at>
---
 src/ImageSharp/Formats/Webp/Lossless/LosslessUtils.cs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/ImageSharp/Formats/Webp/Lossless/LosslessUtils.cs b/src/ImageSharp/Formats/Webp/Lossless/LosslessUtils.cs
index 314f26d64..4f247c434 100644
--- a/src/ImageSharp/Formats/Webp/Lossless/LosslessUtils.cs
+++ b/src/ImageSharp/Formats/Webp/Lossless/LosslessUtils.cs
@@ -764,12 +764,12 @@ namespace SixLabors.ImageSharp.Formats.Webp.Lossless
             if (Avx2.IsSupported)
             {
                 double retVal = 0.0d;
-                Span<int> tmp = stackalloc int[8];
+                Vector256<int> tmp = Vector256<int>.Zero;    // has the size of the scratch space of sizeof(int) * 8
                 ref int xRef = ref MemoryMarshal.GetReference(x);
                 ref int yRef = ref MemoryMarshal.GetReference(y);
                 Vector256<int> sumXY256 = Vector256<int>.Zero;
                 Vector256<int> sumX256 = Vector256<int>.Zero;
-                ref int tmpRef = ref MemoryMarshal.GetReference(tmp);
+                ref int tmpRef = ref Unsafe.As<Vector256<int>, int>(ref tmp);
                 for (nint i = 0; i < 256; i += 8)
                 {
                     Vector256<int> xVec = Unsafe.As<int, Vector256<int>>(ref Unsafe.Add(ref xRef, i));