[HLE] Added GetFirstFunctionIndex matching the start address

Source/Core/Core/HLE/HLE.cpp

@@ -183,12 +183,21 @@ void Execute(u32 _CurrentPC, u32 _Instruction)
   // OSPatches[pos].m_szPatchName);
 }
 
-u32 GetFunctionIndex(u32 addr)
+u32 GetFunctionIndex(u32 address)
 {
-  auto iter = s_original_instructions.find(addr);
+  auto iter = s_original_instructions.find(address);
   return (iter != s_original_instructions.end()) ? iter->second : 0;
 }
 
+u32 GetFirstFunctionIndex(u32 address)
+{
+  u32 index = GetFunctionIndex(address);
+  auto first = std::find_if(
+      s_original_instructions.begin(), s_original_instructions.end(),
+      [=](const auto& entry) { return entry.second == index && entry.first < address; });
+  return first == std::end(s_original_instructions) ? index : 0;
+}
+
 int GetFunctionTypeByIndex(u32 index)
 {
   return OSPatches[index].type;

Source/Core/Core/HLE/HLE.h

@@ -34,7 +34,10 @@ u32 UnPatch(const std::string& patchName);
 bool UnPatch(u32 addr, const std::string& name = {});
 void Execute(u32 _CurrentPC, u32 _Instruction);
 
-u32 GetFunctionIndex(u32 em_address);
+// Returns the HLE function index if the address is located in the function
+u32 GetFunctionIndex(u32 address);
+// Returns the HLE function index if the address matches the function start
+u32 GetFirstFunctionIndex(u32 address);
 int GetFunctionTypeByIndex(u32 index);
 int GetFunctionFlagsByIndex(u32 index);