Revert PcToSnes implementation

src/app/core/common.cc

@@ -2,7 +2,6 @@
 
 #include <imgui/imgui.h>
 
-#include <bitset>
 #include <chrono>
 #include <cstdint>
 #include <functional>
@@ -44,19 +43,16 @@ uint32_t SnesToPc(uint32_t addr) {
 }
 
 uint32_t PcToSnes(uint32_t addr) {
-  std::bitset<24> addr_bits(addr);
-  std::bitset<24> result_bits;
+  uint8_t *b = reinterpret_cast<uint8_t *>(&addr);
+  b[2] = static_cast<uint8_t>(b[2] * 2);
 
-  // Shift the address left by 1 bit
-  addr_bits <<= 1;
+  if (b[1] >= 0x80) {
+    b[2] += 1;
+  } else {
+    b[1] += 0x80;
+  }
 
-  // Set the most significant bit of the second byte
-  addr_bits.set(15, true);
-
-  // Convert the modified bitset back to an integer
-  uint32_t result = static_cast<uint32_t>(addr_bits.to_ulong());
-
-  return result;
+  return addr;
 }
 
 uint32_t MapBankToWordAddress(uint8_t bank, uint16_t addr) {