faster/more compact MatchValueAndRef

Made commandprocessor GetcurrentRingReadcount inline, it was made noinline to match PGO decisions but i think PGO can make extra reg allocation decisions that make this inlining choice yield gains, whereas if we do it manually we lose a tiny bit of performance

Working on a more compact vectorized version of GetScissor to save icache on cmd processor thread
Add WriteRegisterForceinline, will probably end up amending to remove it

add ERMS path for vastcpy

Adding WriteRegistersFromMemCommonSense (name will be changed later), name is because i realized my approach with optimizing writeregisters has been backwards,  instead of handling all checks more quickly within the loop that writes the registers, we need a different loop for each range with unique handling. we also manage to hoist a lot of the logic out of the loops

Use 100ns delay for MaybeYield, noticed we often return almost immediately from the syscall so we end up wasting some cpu, instead we give up the cpu for the min waitable time (on my system, this is 0.5 ms)

Added a note about affinity mask/dynamic process affinity updates to threading_win

Add TextureFetchConstantsWritten

src/xenia/gpu/draw_util.h

@@ -433,13 +433,15 @@ struct GetViewportInfoArgs {
 void GetHostViewportInfo(GetViewportInfoArgs* XE_RESTRICT args,
                          ViewportInfo& viewport_info_out);
 
-struct Scissor {
+struct alignas(16) Scissor {
   // Offset from render target UV = 0 to +UV.
   uint32_t offset[2];
   // Extent can be zero.
   uint32_t extent[2];
 };
-void GetScissor(const RegisterFile& regs, Scissor& scissor_out,
+
+void GetScissor(const RegisterFile& XE_RESTRICT regs,
+                Scissor& XE_RESTRICT scissor_out,
                 bool clamp_to_surface_pitch = true);
 
 // Returns the color component write mask for the draw command taking into