Lay down BaseCPU structure

src/backend/Core.cpp

@@ -9,15 +9,15 @@ Core::Core() {
 }
 
 void Core::Stop() {
-  cpu.Reset();
-  cpu.mem.Reset();
+  cpu->Reset();
+  cpu->mem.Reset();
   pause = true;
   romLoaded = false;
 }
 
 void Core::LoadROM(const std::string& rom_) {
   rom = rom_;
-  cpu.Reset();
+  cpu->Reset();
   pause = false;
   romLoaded = true;
 
@@ -30,21 +30,21 @@ void Core::LoadROM(const std::string& rom_) {
     }
   }
 
-  cpu.mem.LoadROM(isArchive, rom);
-  GameDB::match(cpu.mem);
-  cpu.mem.mmio.vi.isPal = cpu.mem.IsROMPAL();
-  cpu.mem.mmio.si.pif.InitDevices(cpu.mem.saveType);
-  cpu.mem.mmio.si.pif.LoadMempak(rom);
-  cpu.mem.mmio.si.pif.LoadEeprom(cpu.mem.saveType, rom);
-  cpu.mem.flash.Load(cpu.mem.saveType, rom);
-  cpu.mem.LoadSRAM(cpu.mem.saveType, rom);
-  PIF::ExecutePIF(cpu.mem, cpu.regs);
+  cpu->mem.LoadROM(isArchive, rom);
+  GameDB::match(cpu->mem);
+  cpu->mem.mmio.vi.isPal = cpu->mem.IsROMPAL();
+  cpu->mem.mmio.si.pif.InitDevices(cpu->mem.saveType);
+  cpu->mem.mmio.si.pif.LoadMempak(rom);
+  cpu->mem.mmio.si.pif.LoadEeprom(cpu->mem.saveType, rom);
+  cpu->mem.flash.Load(cpu->mem.saveType, rom);
+  cpu->mem.LoadSRAM(cpu->mem.saveType, rom);
+  PIF::ExecutePIF(cpu->mem, cpu->regs);
 }
 
 void Core::Run(float volumeL, float volumeR) {
-  Mem& mem = cpu.mem;
+  Mem& mem = cpu->mem;
   MMIO& mmio = mem.mmio;
-  Registers& regs = cpu.regs;
+  Registers& regs = cpu->regs;
 
   for (int field = 0; field < mmio.vi.numFields; field++) {
     int frameCycles = 0;
@@ -56,7 +56,7 @@ void Core::Run(float volumeL, float volumeR) {
       }
 
       for(; cycles < mem.mmio.vi.cyclesPerHalfline; cycles++, frameCycles++) {
-        int taken = cpu.Step();
+        int taken = cpu->Step();
         static int cpuSteps = 0;
         cpuSteps += taken;
         if(mmio.rsp.spStatus.halt) {
@@ -86,7 +86,7 @@ void Core::Run(float volumeL, float volumeR) {
       InterruptRaise(mmio.mi, regs, Interrupt::VI);
     }
 
-    mmio.ai.Step(cpu.mem, regs, frameCycles, volumeL, volumeR);
+    mmio.ai.Step(cpu->mem, regs, frameCycles, volumeL, volumeR);
     scheduler.tick(frameCycles, mem, regs);
   }
 }

src/backend/Core.hpp

@@ -14,7 +14,7 @@ struct Core {
   void LoadROM(const std::string&);
   void Run(float volumeL, float volumeR);
   void TogglePause() { pause = !pause; }
-  [[nodiscard]] VI& GetVI() { return cpu.mem.mmio.vi; }
+  [[nodiscard]] VI& GetVI() { return cpu->mem.mmio.vi; }
 
   u32 breakpoint = 0;
 
@@ -23,6 +23,6 @@ struct Core {
   int cycles = 0;
   bool romLoaded = false;
   std::string rom;
-  Interpreter cpu;
+  std::unique_ptr<BaseCPU> cpu;
 };
 }

src/backend/core/BaseCPU.hpp

@@ -0,0 +1,13 @@
+#pragma once
+#include <Registers.hpp>
+#include <Mem.hpp>
+
+namespace n64 {
+struct BaseCPU {
+  virtual ~BaseCPU() = default;
+  virtual int Step() {return 0;}
+  virtual void Reset() {}
+  Registers regs;
+  Mem mem;
+};
+}

src/backend/core/Interpreter.hpp

@@ -1,13 +1,14 @@
 #pragma once
 #include <Mem.hpp>
 #include <vector>
+#include "BaseCPU.hpp"
 
 namespace n64 {
 struct Core;
-struct Interpreter {
+struct Interpreter : BaseCPU {
   Interpreter() = default;
-  ~Interpreter() = default;
-  FORCE_INLINE int Step() {
+  ~Interpreter() override = default;
+  FORCE_INLINE int Step() override {
     CheckCompareInterrupt();
 
     regs.prevDelaySlot = regs.delaySlot;
@@ -35,7 +36,7 @@ struct Interpreter {
 
     return 1;
   }
-  void Reset();
+  void Reset() override;
   Registers regs;
   Mem mem;
 private:

src/frontend/App.cpp

@@ -9,7 +9,7 @@ App::App() : window(core) {
 
 void App::Run() {
   SDL_EventState(SDL_DROPFILE, SDL_ENABLE);
-  n64::SI& si = core.cpu.mem.mmio.si;
+  n64::SI& si = core.cpu->mem.mmio.si;
 
   while (!window.done) {
     SDL_Event event;

src/frontend/imgui/Settings.cpp

@@ -21,7 +21,7 @@ namespace fs = std::filesystem;
   } while(0)
 
 
-Settings::Settings() {
+Settings::Settings(n64::Core& core) {
   auto fileExists = fs::exists("resources/settings.json");
   std::fstream settingsFile;
   if(fileExists) {
@@ -34,20 +34,29 @@ Settings::Settings() {
     volumeR = oldVolumeR;
     checkjsonentry(mute, bool, "audio", "mute", false);
     checkjsonentry(lockChannels, bool, "audio", "lockChannels", true);
+    checkjsonentry(jit, bool, "cpu", "enableJIT", false);
   } else {
     settingsFile = std::fstream("resources/settings.json", std::fstream::trunc | std::fstream::in | std::fstream::out);
     settings["audio"]["volumeR"] = 0.5;
     settings["audio"]["volumeL"] = 0.5;
     settings["audio"]["lockChannels"] = true;
     settings["audio"]["mute"] = false;
+    settings["cpu"]["enableJIT"] = false;
 
     oldVolumeR = volumeR = 0.5;
     oldVolumeL = volumeL = 0.5;
     lockChannels = true;
     mute = false;
+    jit = false;
 
     settingsFile << settings;
   }
+
+  if(jit) {
+    Util::panic("JIT is unimplemented!");
+  } else {
+    core.cpu = std::make_unique<n64::Interpreter>();
+  }
   settingsFile.close();
 }
 
@@ -64,6 +73,7 @@ Settings::~Settings() {
   settings["audio"]["volumeL"] = oldVolumeL;
   settings["audio"]["lockChannels"] = lockChannels;
   settings["audio"]["mute"] = mute;
+  settings["cpu"]["enableJIT"] = jit;
   settingsFile << settings;
 
   settingsFile.close();
@@ -73,9 +83,9 @@ void Settings::RenderWidget(bool& show) {
   if(show) {
     ImGui::OpenPopup("Settings");
     if(ImGui::BeginPopupModal("Settings", &show)) {
-      enum class SelectedSetting { Audio, COUNT };
-      static SelectedSetting selectedSetting = SelectedSetting::Audio;
-      const char *categories[(int)SelectedSetting::COUNT] = { "Audio" };
+      enum class SelectedSetting { CPU, Audio, COUNT };
+      static SelectedSetting selectedSetting = SelectedSetting::CPU;
+      const char *categories[(int)SelectedSetting::COUNT] = { "CPU", "Audio" };
       CreateComboList("##", (int*)&selectedSetting, categories, (int)SelectedSetting::COUNT);
       ImGui::Separator();
       switch (selectedSetting) {
@@ -112,6 +122,9 @@ void Settings::RenderWidget(bool& show) {
             }
 
             break;
+        case SelectedSetting::CPU:
+          ImGui::Checkbox("Enable JIT", &jit);
+          break;
         case SelectedSetting::COUNT:
           Util::panic("BRUH");
       }

src/frontend/imgui/Settings.hpp

@@ -6,7 +6,7 @@ namespace n64 { struct Core; }
 using namespace nlohmann;
 
 struct Settings {
-  Settings();
+  Settings(n64::Core& core);
   ~Settings();
 
   [[nodiscard]] FORCE_INLINE float GetVolumeL() const { return volumeL; };
@@ -14,6 +14,7 @@ struct Settings {
 
   void RenderWidget(bool& show);
 private:
+  bool jit = false;
   float volumeL, volumeR;
   float oldVolumeL, oldVolumeR;
   bool lockChannels = true;

src/frontend/imgui/Window.cpp

@@ -8,9 +8,9 @@
 VkInstance instance{};
 namespace fs = std::filesystem;
 
-Window::Window(n64::Core& core) : settings() {
+Window::Window(n64::Core& core) : settings(core) {
   InitSDL();
-  InitParallelRDP(core.cpu.mem.GetRDRAM(), window);
+  InitParallelRDP(core.cpu->mem.GetRDRAM(), window);
   InitImgui();
   NFD::Init();
 }
@@ -155,7 +155,7 @@ ImDrawData* Window::Present(n64::Core& core) {
 void Window::LoadROM(n64::Core& core, const std::string &path) {
   if(!path.empty()) {
     core.LoadROM(path);
-    gameName = core.cpu.mem.rom.gameNameDB;
+    gameName = core.cpu->mem.rom.gameNameDB;
 
     if(gameName.empty()) {
       gameName = fs::path(path).stem().string();
@@ -177,13 +177,13 @@ void Window::RenderMainMenuBar(n64::Core &core) {
       OpenROMDialog(*this, core);
     }
     if (ImGui::MenuItem("Dump RDRAM")) {
-      core.cpu.mem.DumpRDRAM();
+      core.cpu->mem.DumpRDRAM();
     }
     if (ImGui::MenuItem("Dump IMEM")) {
-      core.cpu.mem.DumpIMEM();
+      core.cpu->mem.DumpIMEM();
     }
     if (ImGui::MenuItem("Dump DMEM")) {
-      core.cpu.mem.DumpDMEM();
+      core.cpu->mem.DumpDMEM();
     }
     if (ImGui::MenuItem("Exit")) {
       done = true;
@@ -228,8 +228,8 @@ void Window::Render(n64::Core& core) {
   static u32 lastFrame = 0;
   if(!core.pause && core.romLoaded && lastFrame < ticks - 1000) {
     lastFrame = ticks;
-    windowTitle += fmt::format("  | {:02d} VI/s", core.cpu.mem.mmio.vi.swaps);
-    core.cpu.mem.mmio.vi.swaps = 0;
+    windowTitle += fmt::format("  | {:02d} VI/s", core.cpu->mem.mmio.vi.swaps);
+    core.cpu->mem.mmio.vi.swaps = 0;
     SDL_SetWindowTitle(window, windowTitle.c_str());
     windowTitle = shadowWindowTitle;
   }