Use a descriptor cache for faster pool invalidation. (#1977)

* Use a descriptor cache for faster pool invalidation.

* Speed up comparison by casting to Vector256

Now we never need to worry about this ever again

Ryujinx.Graphics.Gpu/Image/SamplerDescriptor.cs

@@ -1,4 +1,6 @@
 using Ryujinx.Graphics.GAL;
+using System.Runtime.CompilerServices;
+using System.Runtime.Intrinsics;
 
 namespace Ryujinx.Graphics.Gpu.Image
 {
@@ -244,5 +246,15 @@ namespace Ryujinx.Graphics.Gpu.Image
         {
             return ((Word2 >> 12) & 0xfff) * Frac8ToF32;
         }
+
+        /// <summary>
+        /// Check if two descriptors are equal.
+        /// </summary>
+        /// <param name="other">The descriptor to compare against</param>
+        /// <returns>True if they are equal, false otherwise</returns>
+        public bool Equals(ref SamplerDescriptor other)
+        {
+            return Unsafe.As<SamplerDescriptor, Vector256<byte>>(ref this).Equals(Unsafe.As<SamplerDescriptor, Vector256<byte>>(ref other));
+        }
     }
 }