.diff

diff --git a/src/core/file_sys/vfs_real.cpp b/src/core/file_sys/vfs_real.cpp
index 22c858e0..99deb579 100644
--- a/src/core/file_sys/vfs_real.cpp
+++ b/src/core/file_sys/vfs_real.cpp
@@ -1,7 +1,7 @@
 // Copyright 2018 yuzu emulator team
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
-
+#pragma optimize("", off)
 #include "common/common_paths.h"
 #include "common/logging/log.h"
 #include "core/file_sys/vfs_real.h"
@@ -9,7 +9,7 @@
 namespace FileSys {
 
 static std::string PermissionsToCharArray(Mode perms) {
-    std::string out;
+    /*std::string out;
     switch (perms) {
     case Mode::Read:
         out += "r";
@@ -21,7 +21,29 @@ static std::string PermissionsToCharArray(Mode perms) {
         out += "a";
         break;
     }
-    return out + "b";
+    return out + "b";*/
+    std::string mode_str;
+    u32 mode_flags = static_cast<u32>(perms);
+
+    // Calculate the correct open mode for the file.
+    if ((mode_flags & static_cast<u32>(Mode::Read)) &&
+        (mode_flags & static_cast<u32>(Mode::Write))) {
+        if (mode_flags & static_cast<u32>(Mode::Append))
+            mode_str = "a+";
+        else
+            mode_str = "r+";
+    } else {
+        if (mode_flags & static_cast<u32>(Mode::Read))
+            mode_str = "r";
+        else if (mode_flags & static_cast<u32>(Mode::Append))
+            mode_str = "a";
+        else if (mode_flags & static_cast<u32>(Mode::Write))
+            mode_str = "w";
+    }
+
+    mode_str += "b";
+
+    return mode_str;
 }
 
 RealVfsFile::RealVfsFile(const std::string& path_, Mode perms_)
@@ -48,11 +70,12 @@ std::shared_ptr<VfsDirectory> RealVfsFile::GetContainingDirectory() const {
 }
 
 bool RealVfsFile::IsWritable() const {
-    return perms == Mode::Append || perms == Mode::Write;
+    return static_cast<u32>(perms) &
+           (static_cast<u32>(Mode::Append) | static_cast<u32>(Mode::Write));
 }
 
 bool RealVfsFile::IsReadable() const {
-    return perms == Mode::Read || perms == Mode::Write;
+    return static_cast<u32>(perms) & (static_cast<u32>(Mode::Read) | static_cast<u32>(Mode::Write));
 }
 
 size_t RealVfsFile::Read(u8* data, size_t length, size_t offset) const {
@@ -85,11 +108,16 @@ RealVfsDirectory::RealVfsDirectory(const std::string& path_, Mode perms_)
       path_components(FileUtil::SplitPathComponents(path)),
       parent_components(FileUtil::SliceVector(path_components, 0, path_components.size() - 1)),
       perms(perms_) {
-    if (!FileUtil::Exists(path) && (perms == Mode::Write || perms == Mode::Append))
+    if (!FileUtil::Exists(path) && (static_cast<u32>(perms) & (static_cast<u32>(Mode::Write) |
+                                                               static_cast<u32>(Mode::Append)))) {
         FileUtil::CreateDir(path);
+    }
+
     unsigned size;
-    if (perms == Mode::Append)
+
+    if (static_cast<u32>(perms) & static_cast<u32>(Mode::Append)) {
         return;
+    }
 
     FileUtil::ForeachDirectoryEntry(
         &size, path,
@@ -112,11 +140,12 @@ std::vector<std::shared_ptr<VfsDirectory>> RealVfsDirectory::GetSubdirectories()
 }
 
 bool RealVfsDirectory::IsWritable() const {
-    return perms == Mode::Write || perms == Mode::Append;
+    return static_cast<u32>(perms) &
+           (static_cast<u32>(Mode::Append) | static_cast<u32>(Mode::Write));
 }
 
 bool RealVfsDirectory::IsReadable() const {
-    return perms == Mode::Read || perms == Mode::Write;
+    return static_cast<u32>(perms) & (static_cast<u32>(Mode::Read) | static_cast<u32>(Mode::Write));
 }
 
 std::string RealVfsDirectory::GetName() const {