From 03a988be3d3d7f3e68349c69198393175b34766a Mon Sep 17 00:00:00 2001
From: Stefan Nikolei <stefan@nikolei.eu>
Date: Sun, 2 Apr 2023 22:48:40 +0200
Subject: [PATCH] Add Arm for SumVertical

---
 .../Jpeg/Components/Encoder/ComponentProcessor.cs    | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/ImageSharp/Formats/Jpeg/Components/Encoder/ComponentProcessor.cs b/src/ImageSharp/Formats/Jpeg/Components/Encoder/ComponentProcessor.cs
index 31c1e27cb3..7d4f7ee842 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Encoder/ComponentProcessor.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Encoder/ComponentProcessor.cs
@@ -129,6 +129,18 @@ internal class ComponentProcessor : IDisposable
                     Unsafe.Add(ref targetVectorRef, i) = Avx.Add(Unsafe.Add(ref targetVectorRef, i), Unsafe.Add(ref sourceVectorRef, i));
                 }
             }
+            else if (AdvSimd.IsSupported)
+            {
+                ref Vector128<float> targetVectorRef = ref Unsafe.As<float, Vector128<float>>(ref MemoryMarshal.GetReference(target));
+                ref Vector128<float> sourceVectorRef = ref Unsafe.As<float, Vector128<float>>(ref MemoryMarshal.GetReference(source));
+
+                // Spans are guaranteed to be multiple of 8 so no extra 'remainder' steps are needed
+                nuint count = source.Vector128Count<float>();
+                for (nuint i = 0; i < count; i++)
+                {
+                    Unsafe.Add(ref targetVectorRef, i) = AdvSimd.Add(Unsafe.Add(ref targetVectorRef, i), Unsafe.Add(ref sourceVectorRef, i));
+                }
+            }
             else
             {
                 ref Vector<float> targetVectorRef = ref Unsafe.As<float, Vector<float>>(ref MemoryMarshal.GetReference(target));