- Stop using inheritance for CPU, instead use composition.

- Introduce KAIZEN_JIT_ENABLED optional define instead of relying on __aarch64__ and the like.
- More cache work

CMakeLists.txt

@@ -13,6 +13,7 @@ if(APPLE)
   enable_language(OBJC)
 endif()
 
+set(USE_JIT FALSE)
 set(VULKAN_VALIDATION FALSE)
 set(SANITIZERS FALSE)
 set(CMAKE_CXX_STANDARD 23)
@@ -115,6 +116,9 @@ endif()
 set(SIMD_FLAG NULL)
 
 if(ARM64)
+  if(USE_JIT)
+    message(FATAL_ERROR "JIT unsupported in aarch64 at the moment")
+  endif()
   message("Defining USE_NEON...")
   add_compile_definitions(USE_NEON)
   add_compile_definitions(SIMD_SUPPORT)
@@ -182,6 +186,9 @@ endif()
 
 target_link_libraries(kaizen PUBLIC imgui SDL3::SDL3 SDL3::SDL3-static cflags::cflags ${MIO_LIB} parallel-rdp capstone backend)
 target_compile_definitions(kaizen PUBLIC SDL_MAIN_HANDLED)
+if(USE_JIT)
+  target_compile_definitions(kaizen PUBLIC KAIZEN_JIT_ENABLED)
+endif()
 
 if (SANITIZERS)
   message("UBSAN AND ASAN: ON")