Implement FPS counting

src/backend/core/Mem.cpp

@@ -3,7 +3,6 @@
 #include <backend/RomHelpers.hpp>
 #include <cassert>
 #include <core/Interpreter.hpp>
-#include <core/registers/Cop0.hpp>
 #include <core/registers/Registers.hpp>
 #include <unarr.h>
 
@@ -283,6 +282,7 @@ u32 Mem::Read(Registers &regs, const u32 paddr) {
     return 0;
   default:
     Util::panic("Unimplemented 32-bit read at address {:08X} (PC = {:016X})", paddr, (u64)regs.pc);
+    return 0;
   }
 }
 
@@ -313,6 +313,7 @@ u64 Mem::Read(Registers &regs, const u32 paddr) {
     return 0;
   default:
     Util::panic("Unimplemented 32-bit read at address {:08X} (PC = {:016X})", paddr, (u64)regs.pc);
+    return 0;
   }
 }
 

src/frontend/EmuThread.cpp

@@ -12,6 +12,7 @@ void EmuThread::run() noexcept {
   auto lastSample = std::chrono::high_resolution_clock::now();
   auto avgFps = 16.667;
   auto sampledFps = 0;
+  static bool oneSecondPassed = false;
 
   fps.setText(fmt::format("{:.2f} FPS", 1000.0 / avgFps).c_str());
 
@@ -34,6 +35,10 @@ void EmuThread::run() noexcept {
 
     if (const auto elapsedSinceLastSample = std::chrono::duration<double>(endFrameTime - lastSample) / 1s;
         elapsedSinceLastSample >= 1.0) {
+      if (!oneSecondPassed) {
+        oneSecondPassed = true;
+        continue;
+      }
       lastSample = endFrameTime;
       avgFps /= sampledFps;
       sampledFps = 0;