Minor decoder optimizations, kernel fixes, cpu backend fixes

src/xenia/cpu/backend/x64/x64_code_cache_win.cc

@@ -209,7 +209,16 @@ bool Win32X64CodeCache::Initialize() {
 
 Win32X64CodeCache::UnwindReservation
 Win32X64CodeCache::RequestUnwindReservation(uint8_t* entry_address) {
+#if defined(NDEBUG)
+  if (unwind_table_count_ >= kMaximumFunctionCount) {
+    // we should not just be ignoring this in release if it happens
+    xe::FatalError(
+        "Unwind table count (unwind_table_count_) exceeded maximum! Please report this to "
+        "Xenia/Canary developers");
+  }
+#else
   assert_false(unwind_table_count_ >= kMaximumFunctionCount);
+#endif
   UnwindReservation unwind_reservation;
   unwind_reservation.data_size = xe::round_up(kUnwindInfoSize, 16);
   unwind_reservation.table_slot = unwind_table_count_++;