rewrite of f32 fma, and other optmization of simd kernel ops

StgSharp.Mathematics/Numeric/MatrixParallel.cs

@@ -2,8 +2,8 @@
 // -----------------------------------------------------------------------
 // file="MatrixParallel"
 // Project: StgSharp
-// AuthorGroup: Nitload Space
-// Copyright (c) Nitload Space. All rights reserved.
+// AuthorGroup: Nitload
+// Copyright (c) Nitload. All rights reserved.
 //     
 // Permission is hereby granted, free of charge, to any person obtaining a copy
 // of this software and associated documentation files (the "Software"), to deal
@@ -40,7 +40,7 @@ namespace StgSharp.Mathematics.Numeric
 
         private static bool _meaningful;
 
-        private static ConcurrentCapacityFixedStack<MatrixParallelThread> _threads;
+        private static CapacityFixedStack<MatrixParallelThread> _threads;
 
         private static volatile int RemainThreadCount = 0;
         private static readonly object _lock = new();