28 files changed, 133 insertions, 132 deletions

diff --git a/src/core/CMakeLists.txt b/src/core/CMakeLists.txt
index d0c405ec7..9760be4e4 100644
--- a/src/core/CMakeLists.txt
+++ b/src/core/CMakeLists.txt
@@ -623,6 +623,17 @@ if (MSVC)
         # 'context' : truncation from 'type1' to 'type2'
         /we4305
     )
+else()
+    target_compile_options(core PRIVATE
+        -Werror=conversion
+        -Werror=ignored-qualifiers
+        -Werror=implicit-fallthrough
+        -Werror=reorder
+        -Werror=sign-compare
+        -Werror=unused-but-set-parameter
+        -Werror=unused-but-set-variable
+        -Werror=unused-variable
+    )
 endif()
 
 create_target_directory_groups(core)
diff --git a/src/core/crypto/key_manager.cpp b/src/core/crypto/key_manager.cpp
index 65d246050..da15f764a 100644
--- a/src/core/crypto/key_manager.cpp
+++ b/src/core/crypto/key_manager.cpp
@@ -411,7 +411,7 @@ Loader::ResultStatus DeriveSDKeys(std::array<Key256, 2>& sd_keys, KeyManager& ke
     // Combine sources and seed
     for (auto& source : sd_key_sources) {
         for (std::size_t i = 0; i < source.size(); ++i) {
-            source[i] ^= sd_seed[i & 0xF];
+            source[i] = static_cast<u8>(source[i] ^ sd_seed[i & 0xF]);
         }
     }
 
diff --git a/src/core/file_sys/fsmitm_romfsbuild.cpp b/src/core/file_sys/fsmitm_romfsbuild.cpp
index 2aff2708a..c52fafb6f 100644
--- a/src/core/file_sys/fsmitm_romfsbuild.cpp
+++ b/src/core/file_sys/fsmitm_romfsbuild.cpp
@@ -266,8 +266,9 @@ std::multimap<u64, VirtualFile> RomFSBuildContext::Build() {
         cur_file->offset = file_partition_size;
         file_partition_size += cur_file->size;
         cur_file->entry_offset = entry_offset;
-        entry_offset += sizeof(RomFSFileEntry) +
-                        Common::AlignUp(cur_file->path_len - cur_file->cur_path_ofs, 4);
+        entry_offset +=
+            static_cast<u32>(sizeof(RomFSFileEntry) +
+                             Common::AlignUp(cur_file->path_len - cur_file->cur_path_ofs, 4));
         prev_file = cur_file;
     }
     // Assign deferred parent/sibling ownership.
@@ -284,8 +285,9 @@ std::multimap<u64, VirtualFile> RomFSBuildContext::Build() {
     for (const auto& it : directories) {
         cur_dir = it.second;
         cur_dir->entry_offset = entry_offset;
-        entry_offset += sizeof(RomFSDirectoryEntry) +
-                        Common::AlignUp(cur_dir->path_len - cur_dir->cur_path_ofs, 4);
+        entry_offset +=
+            static_cast<u32>(sizeof(RomFSDirectoryEntry) +
+                             Common::AlignUp(cur_dir->path_len - cur_dir->cur_path_ofs, 4));
     }
     // Assign deferred parent/sibling ownership.
     for (auto it = directories.rbegin(); it->second != root; ++it) {
diff --git a/src/core/file_sys/ips_layer.cpp b/src/core/file_sys/ips_layer.cpp
index dd779310f..a6101f1c0 100644
--- a/src/core/file_sys/ips_layer.cpp
+++ b/src/core/file_sys/ips_layer.cpp
@@ -299,7 +299,7 @@ void IPSwitchCompiler::Parse() {
                              patch_text->GetName(), offset, Common::HexToString(replace));
                 }
 
-                patch.records.insert_or_assign(offset, std::move(replace));
+                patch.records.insert_or_assign(static_cast<u32>(offset), std::move(replace));
             }
 
             patches.push_back(std::move(patch));
diff --git a/src/core/file_sys/nca_metadata.cpp b/src/core/file_sys/nca_metadata.cpp
index 2d1476e3a..3596541b2 100644
--- a/src/core/file_sys/nca_metadata.cpp
+++ b/src/core/file_sys/nca_metadata.cpp
@@ -108,7 +108,7 @@ std::vector<u8> CNMT::Serialize() const {
         memcpy(out.data() + sizeof(CNMTHeader), &opt_header, sizeof(OptionalHeader));
     }
 
-    auto offset = header.table_offset;
+    u64_le offset = header.table_offset;
 
     for (const auto& rec : content_records) {
         memcpy(out.data() + offset + sizeof(CNMTHeader), &rec, sizeof(ContentRecord));
diff --git a/src/core/file_sys/patch_manager.cpp b/src/core/file_sys/patch_manager.cpp
index b9c09b456..807b05821 100644
--- a/src/core/file_sys/patch_manager.cpp
+++ b/src/core/file_sys/patch_manager.cpp
@@ -29,7 +29,7 @@
 namespace FileSys {
 namespace {
 
-constexpr u64 SINGLE_BYTE_MODULUS = 0x100;
+constexpr u32 SINGLE_BYTE_MODULUS = 0x100;
 constexpr u64 DLC_BASE_TITLE_ID_MASK = 0xFFFFFFFFFFFFE000;
 
 constexpr std::array<const char*, 14> EXEFS_FILE_NAMES{
diff --git a/src/core/frontend/emu_window.cpp b/src/core/frontend/emu_window.cpp
index 9a081fbd4..8c1193894 100644
--- a/src/core/frontend/emu_window.cpp
+++ b/src/core/frontend/emu_window.cpp
@@ -84,10 +84,12 @@ void EmuWindow::TouchPressed(unsigned framebuffer_x, unsigned framebuffer_y) {
         return;
 
     std::lock_guard guard{touch_state->mutex};
-    touch_state->touch_x = static_cast<float>(framebuffer_x - framebuffer_layout.screen.left) /
-                           (framebuffer_layout.screen.right - framebuffer_layout.screen.left);
-    touch_state->touch_y = static_cast<float>(framebuffer_y - framebuffer_layout.screen.top) /
-                           (framebuffer_layout.screen.bottom - framebuffer_layout.screen.top);
+    touch_state->touch_x =
+        static_cast<float>(framebuffer_x - framebuffer_layout.screen.left) /
+        static_cast<float>(framebuffer_layout.screen.right - framebuffer_layout.screen.left);
+    touch_state->touch_y =
+        static_cast<float>(framebuffer_y - framebuffer_layout.screen.top) /
+        static_cast<float>(framebuffer_layout.screen.bottom - framebuffer_layout.screen.top);
 
     touch_state->touch_pressed = true;
 }
diff --git a/src/core/frontend/framebuffer_layout.cpp b/src/core/frontend/framebuffer_layout.cpp
index c1fbc235b..1acc82497 100644
--- a/src/core/frontend/framebuffer_layout.cpp
+++ b/src/core/frontend/framebuffer_layout.cpp
@@ -14,8 +14,8 @@ namespace Layout {
 template <class T>
 static Common::Rectangle<T> MaxRectangle(Common::Rectangle<T> window_area,
                                          float screen_aspect_ratio) {
-    float scale = std::min(static_cast<float>(window_area.GetWidth()),
-                           window_area.GetHeight() / screen_aspect_ratio);
+    const float scale = std::min(static_cast<float>(window_area.GetWidth()),
+                                 static_cast<float>(window_area.GetHeight()) / screen_aspect_ratio);
     return Common::Rectangle<T>{0, 0, static_cast<T>(std::round(scale)),
                                 static_cast<T>(std::round(scale * screen_aspect_ratio))};
 }
@@ -27,7 +27,7 @@ FramebufferLayout DefaultFrameLayout(u32 width, u32 height) {
     // so just calculate them both even if the other isn't showing.
     FramebufferLayout res{width, height, false, {}};
 
-    const float window_aspect_ratio = static_cast<float>(height) / width;
+    const float window_aspect_ratio = static_cast<float>(height) / static_cast<float>(width);
     const float emulation_aspect_ratio = EmulationAspectRatio(
         static_cast<AspectRatio>(Settings::values.aspect_ratio.GetValue()), window_aspect_ratio);
 
diff --git a/src/core/gdbstub/gdbstub.cpp b/src/core/gdbstub/gdbstub.cpp
index 79f22a403..97ee65464 100644
--- a/src/core/gdbstub/gdbstub.cpp
+++ b/src/core/gdbstub/gdbstub.cpp
@@ -291,11 +291,11 @@ static void FpuWrite(std::size_t id, u128 val, Kernel::Thread* thread = nullptr)
  */
 static u8 HexCharToValue(u8 hex) {
     if (hex >= '0' && hex <= '9') {
-        return hex - '0';
+        return static_cast<u8>(hex - '0');
     } else if (hex >= 'a' && hex <= 'f') {
-        return hex - 'a' + 0xA;
+        return static_cast<u8>(hex - 'a' + 0xA);
     } else if (hex >= 'A' && hex <= 'F') {
-        return hex - 'A' + 0xA;
+        return static_cast<u8>(hex - 'A' + 0xA);
     }
 
     LOG_ERROR(Debug_GDBStub, "Invalid nibble: {} ({:02X})", hex, hex);
@@ -310,9 +310,9 @@ static u8 HexCharToValue(u8 hex) {
 static u8 NibbleToHex(u8 n) {
     n &= 0xF;
     if (n < 0xA) {
-        return '0' + n;
+        return static_cast<u8>('0' + n);
     } else {
-        return 'a' + n - 0xA;
+        return static_cast<u8>('a' + n - 0xA);
     }
 }
 
@@ -355,8 +355,8 @@ static u64 HexToLong(const u8* src, std::size_t len) {
  */
 static void MemToGdbHex(u8* dest, const u8* src, std::size_t len) {
     while (len-- > 0) {
-        u8 tmp = *src++;
-        *dest++ = NibbleToHex(tmp >> 4);
+        const u8 tmp = *src++;
+        *dest++ = NibbleToHex(static_cast<u8>(tmp >> 4));
         *dest++ = NibbleToHex(tmp);
     }
 }
@@ -370,7 +370,7 @@ static void MemToGdbHex(u8* dest, const u8* src, std::size_t len) {
  */
 static void GdbHexToMem(u8* dest, const u8* src, std::size_t len) {
     while (len-- > 0) {
-        *dest++ = (HexCharToValue(src[0]) << 4) | HexCharToValue(src[1]);
+        *dest++ = static_cast<u8>((HexCharToValue(src[0]) << 4) | HexCharToValue(src[1]));
         src += 2;
     }
 }
@@ -602,22 +602,22 @@ static void SendReply(const char* reply) {
 
     memcpy(command_buffer + 1, reply, command_length);
 
-    u8 checksum = CalculateChecksum(command_buffer, command_length + 1);
+    const u8 checksum = CalculateChecksum(command_buffer, command_length + 1);
     command_buffer[0] = GDB_STUB_START;
     command_buffer[command_length + 1] = GDB_STUB_END;
-    command_buffer[command_length + 2] = NibbleToHex(checksum >> 4);
+    command_buffer[command_length + 2] = NibbleToHex(static_cast<u8>(checksum >> 4));
     command_buffer[command_length + 3] = NibbleToHex(checksum);
 
     u8* ptr = command_buffer;
     u32 left = command_length + 4;
     while (left > 0) {
-        int sent_size = send(gdbserver_socket, reinterpret_cast<char*>(ptr), left, 0);
+        const auto sent_size = send(gdbserver_socket, reinterpret_cast<char*>(ptr), left, 0);
         if (sent_size < 0) {
             LOG_ERROR(Debug_GDBStub, "gdb: send failed");
             return Shutdown();
         }
 
-        left -= sent_size;
+        left -= static_cast<u32>(sent_size);
         ptr += sent_size;
     }
 }
@@ -777,10 +777,10 @@ static void ReadCommand() {
         command_buffer[command_length++] = c;
     }
 
-    u8 checksum_received = HexCharToValue(ReadByte()) << 4;
-    checksum_received |= HexCharToValue(ReadByte());
+    auto checksum_received = static_cast<u32>(HexCharToValue(ReadByte()) << 4);
+    checksum_received |= static_cast<u32>(HexCharToValue(ReadByte()));
 
-    u8 checksum_calculated = CalculateChecksum(command_buffer, command_length);
+    const u32 checksum_calculated = CalculateChecksum(command_buffer, command_length);
 
     if (checksum_received != checksum_calculated) {
         LOG_ERROR(Debug_GDBStub,
diff --git a/src/core/hle/ipc_helpers.h b/src/core/hle/ipc_helpers.h
index 1b503331f..1c354037d 100644
--- a/src/core/hle/ipc_helpers.h
+++ b/src/core/hle/ipc_helpers.h
@@ -38,10 +38,11 @@ public:
     explicit RequestHelperBase(Kernel::HLERequestContext& context)
         : context(&context), cmdbuf(context.CommandBuffer()) {}
 
-    void Skip(unsigned size_in_words, bool set_to_null) {
-        if (set_to_null)
+    void Skip(u32 size_in_words, bool set_to_null) {
+        if (set_to_null) {
             memset(cmdbuf + index, 0, size_in_words * sizeof(u32));
-        index += size_in_words;
+        }
+        index += static_cast<ptrdiff_t>(size_in_words);
     }
 
     /**
@@ -49,15 +50,15 @@ public:
      */
     void AlignWithPadding() {
         if (index & 3) {
-            Skip(4 - (index & 3), true);
+            Skip(static_cast<u32>(4 - (index & 3)), true);
         }
     }
 
-    unsigned GetCurrentOffset() const {
-        return static_cast<unsigned>(index);
+    u32 GetCurrentOffset() const {
+        return static_cast<u32>(index);
     }
 
-    void SetCurrentOffset(unsigned offset) {
+    void SetCurrentOffset(u32 offset) {
         index = static_cast<ptrdiff_t>(offset);
     }
 };
@@ -89,7 +90,7 @@ public:
 
         // The entire size of the raw data section in u32 units, including the 16 bytes of mandatory
         // padding.
-        u32 raw_data_size = sizeof(IPC::DataPayloadHeader) / 4 + 4 + normal_params_size;
+        u64 raw_data_size = sizeof(IPC::DataPayloadHeader) / 4 + 4 + normal_params_size;
 
         u32 num_handles_to_move{};
         u32 num_domain_objects{};
@@ -105,7 +106,7 @@ public:
             raw_data_size += sizeof(DomainMessageHeader) / 4 + num_domain_objects;
         }
 
-        header.data_size.Assign(raw_data_size);
+        header.data_size.Assign(static_cast<u32>(raw_data_size));
         if (num_handles_to_copy || num_handles_to_move) {
             header.enable_handle_descriptor.Assign(1);
         }
diff --git a/src/core/hle/kernel/handle_table.cpp b/src/core/hle/kernel/handle_table.cpp
index fb30b6f8b..3e745c18b 100644
--- a/src/core/hle/kernel/handle_table.cpp
+++ b/src/core/hle/kernel/handle_table.cpp
@@ -118,7 +118,7 @@ std::shared_ptr<Object> HandleTable::GetGeneric(Handle handle) const {
 
 void HandleTable::Clear() {
     for (u16 i = 0; i < table_size; ++i) {
-        generations[i] = i + 1;
+        generations[i] = static_cast<u16>(i + 1);
         objects[i] = nullptr;
     }
     next_free_slot = 0;
diff --git a/src/core/hle/kernel/scheduler.cpp b/src/core/hle/kernel/scheduler.cpp
index 5cbd3b912..6b7db5372 100644
--- a/src/core/hle/kernel/scheduler.cpp
+++ b/src/core/hle/kernel/scheduler.cpp
@@ -72,7 +72,7 @@ u32 GlobalScheduler::SelectThreads() {
         if (top_thread != nullptr) {
             // TODO(Blinkhawk): Implement Thread Pinning
         } else {
-            idle_cores |= (1ul << core);
+            idle_cores |= (1U << core);
         }
         top_threads[core] = top_thread;
     }
@@ -126,7 +126,7 @@ u32 GlobalScheduler::SelectThreads() {
             top_threads[core_id] = suggested;
         }
 
-        idle_cores &= ~(1ul << core_id);
+        idle_cores &= ~(1U << core_id);
     }
     u32 cores_needing_context_switch{};
     for (u32 core = 0; core < Core::Hardware::NUM_CPU_CORES; core++) {
@@ -134,7 +134,7 @@ u32 GlobalScheduler::SelectThreads() {
         ASSERT(top_threads[core] == nullptr ||
                static_cast<u32>(top_threads[core]->GetProcessorID()) == core);
         if (update_thread(top_threads[core], sched)) {
-            cores_needing_context_switch |= (1ul << core);
+            cores_needing_context_switch |= (1U << core);
         }
     }
     return cores_needing_context_switch;
@@ -364,7 +364,7 @@ void GlobalScheduler::EnableInterruptAndSchedule(u32 cores_pending_reschedule,
         } else {
             must_context_switch = true;
         }
-        cores_pending_reschedule &= ~(1ul << core);
+        cores_pending_reschedule &= ~(1U << core);
     }
     if (must_context_switch) {
         auto& core_scheduler = kernel.CurrentScheduler();
@@ -767,7 +767,7 @@ void Scheduler::SwitchToCurrent() {
                     current_thread->context_guard.unlock();
                     break;
                 }
-                if (current_thread->GetProcessorID() != core_id) {
+                if (static_cast<u32>(current_thread->GetProcessorID()) != core_id) {
                     current_thread->context_guard.unlock();
                     break;
                 }
diff --git a/src/core/hle/service/bcat/backend/boxcat.cpp b/src/core/hle/service/bcat/backend/boxcat.cpp
index ca021a99f..589e288df 100644
--- a/src/core/hle/service/bcat/backend/boxcat.cpp
+++ b/src/core/hle/service/bcat/backend/boxcat.cpp
@@ -196,7 +196,9 @@ private:
                                     const std::string& content_type_name) {
         if (client == nullptr) {
             client = std::make_unique<httplib::SSLClient>(BOXCAT_HOSTNAME, PORT);
-            client->set_timeout_sec(timeout_seconds);
+            client->set_connection_timeout(timeout_seconds);
+            client->set_read_timeout(timeout_seconds);
+            client->set_write_timeout(timeout_seconds);
         }
 
         httplib::Headers headers{
@@ -255,7 +257,7 @@ private:
         return out;
     }
 
-    std::unique_ptr<httplib::Client> client;
+    std::unique_ptr<httplib::SSLClient> client;
     std::string path;
     u64 title_id;
     u64 build_id;
@@ -443,7 +445,9 @@ std::optional<std::vector<u8>> Boxcat::GetLaunchParameter(TitleIDVersion title)
 Boxcat::StatusResult Boxcat::GetStatus(std::optional<std::string>& global,
                                        std::map<std::string, EventStatus>& games) {
     httplib::SSLClient client{BOXCAT_HOSTNAME, static_cast<int>(PORT)};
-    client.set_timeout_sec(static_cast<int>(TIMEOUT_SECONDS));
+    client.set_connection_timeout(static_cast<int>(TIMEOUT_SECONDS));
+    client.set_read_timeout(static_cast<int>(TIMEOUT_SECONDS));
+    client.set_write_timeout(static_cast<int>(TIMEOUT_SECONDS));
 
     httplib::Headers headers{
         {std::string("Game-Assets-API-Version"), std::string(BOXCAT_API_VERSION)},
diff --git a/src/core/hle/service/hid/controllers/keyboard.cpp b/src/core/hle/service/hid/controllers/keyboard.cpp
index 0b896d5ad..59b694cd4 100644
--- a/src/core/hle/service/hid/controllers/keyboard.cpp
+++ b/src/core/hle/service/hid/controllers/keyboard.cpp
@@ -42,8 +42,8 @@ void Controller_Keyboard::OnUpdate(const Core::Timing::CoreTiming& core_timing,
     cur_entry.modifier = 0;
     if (Settings::values.keyboard_enabled) {
         for (std::size_t i = 0; i < keyboard_keys.size(); ++i) {
-            cur_entry.key[i / KEYS_PER_BYTE] |=
-                (keyboard_keys[i]->GetStatus() << (i % KEYS_PER_BYTE));
+            auto& entry = cur_entry.key[i / KEYS_PER_BYTE];
+            entry = static_cast<u8>(entry | (keyboard_keys[i]->GetStatus() << (i % KEYS_PER_BYTE)));
         }
 
         for (std::size_t i = 0; i < keyboard_mods.size(); ++i) {
diff --git a/src/core/hle/service/hid/controllers/npad.cpp b/src/core/hle/service/hid/controllers/npad.cpp
index 2de4ed348..e311bc18c 100644
--- a/src/core/hle/service/hid/controllers/npad.cpp
+++ b/src/core/hle/service/hid/controllers/npad.cpp
@@ -269,7 +269,6 @@ void Controller_NPad::RequestPadStateUpdate(u32 npad_id) {
     auto& rstick_entry = npad_pad_states[controller_idx].r_stick;
     const auto& button_state = buttons[controller_idx];
     const auto& analog_state = sticks[controller_idx];
-    const auto& motion_state = motions[controller_idx];
     const auto [stick_l_x_f, stick_l_y_f] =
         analog_state[static_cast<std::size_t>(JoystickId::Joystick_Left)]->GetStatus();
     const auto [stick_r_x_f, stick_r_y_f] =
@@ -391,18 +390,6 @@ void Controller_NPad::OnUpdate(const Core::Timing::CoreTiming& core_timing, u8*
 
         libnx_entry.connection_status.raw = 0;
         libnx_entry.connection_status.IsConnected.Assign(1);
-        auto& full_sixaxis_entry =
-            npad.sixaxis_full.sixaxis[npad.sixaxis_full.common.last_entry_index];
-        auto& handheld_sixaxis_entry =
-            npad.sixaxis_handheld.sixaxis[npad.sixaxis_handheld.common.last_entry_index];
-        auto& dual_left_sixaxis_entry =
-            npad.sixaxis_dual_left.sixaxis[npad.sixaxis_dual_left.common.last_entry_index];
-        auto& dual_right_sixaxis_entry =
-            npad.sixaxis_dual_right.sixaxis[npad.sixaxis_dual_right.common.last_entry_index];
-        auto& left_sixaxis_entry =
-            npad.sixaxis_left.sixaxis[npad.sixaxis_left.common.last_entry_index];
-        auto& right_sixaxis_entry =
-            npad.sixaxis_right.sixaxis[npad.sixaxis_right.common.last_entry_index];
 
         switch (controller_type) {
         case NPadControllerType::None:
@@ -541,18 +528,6 @@ void Controller_NPad::OnMotionUpdate(const Core::Timing::CoreTiming& core_timing
             }
         }
 
-        auto& main_controller =
-            npad.main_controller_states.npad[npad.main_controller_states.common.last_entry_index];
-        auto& handheld_entry =
-            npad.handheld_states.npad[npad.handheld_states.common.last_entry_index];
-        auto& dual_entry = npad.dual_states.npad[npad.dual_states.common.last_entry_index];
-        auto& left_entry = npad.left_joy_states.npad[npad.left_joy_states.common.last_entry_index];
-        auto& right_entry =
-            npad.right_joy_states.npad[npad.right_joy_states.common.last_entry_index];
-        auto& pokeball_entry =
-            npad.pokeball_states.npad[npad.pokeball_states.common.last_entry_index];
-        auto& libnx_entry = npad.libnx.npad[npad.libnx.common.last_entry_index];
-
         auto& full_sixaxis_entry =
             npad.sixaxis_full.sixaxis[npad.sixaxis_full.common.last_entry_index];
         auto& handheld_sixaxis_entry =
diff --git a/src/core/hle/service/hid/hid.cpp b/src/core/hle/service/hid/hid.cpp
index 71dbaba7f..8918946a1 100644
--- a/src/core/hle/service/hid/hid.cpp
+++ b/src/core/hle/service/hid/hid.cpp
@@ -475,7 +475,7 @@ void Hid::StopSixAxisSensor(Kernel::HLERequestContext& ctx) {
 
 void Hid::EnableSixAxisSensorFusion(Kernel::HLERequestContext& ctx) {
     IPC::RequestParser rp{ctx};
-    const auto enable{rp.Pop<bool>()};
+    [[maybe_unused]] const auto enable{rp.Pop<bool>()};
     const auto handle{rp.Pop<u32>()};
     const auto applet_resource_user_id{rp.Pop<u64>()};
 
diff --git a/src/core/hle/service/mii/manager.cpp b/src/core/hle/service/mii/manager.cpp
index 4730070cb..8e433eb41 100644
--- a/src/core/hle/service/mii/manager.cpp
+++ b/src/core/hle/service/mii/manager.cpp
@@ -428,7 +428,7 @@ bool MiiManager::IsFullDatabase() const {
 }
 
 u32 MiiManager::GetCount(SourceFlag source_flag) const {
-    u32 count{};
+    std::size_t count{};
     if ((source_flag & SourceFlag::Database) != SourceFlag::None) {
         // TODO(bunnei): We don't implement the Mii database, but when we do, update this
         count += 0;
@@ -436,7 +436,7 @@ u32 MiiManager::GetCount(SourceFlag source_flag) const {
     if ((source_flag & SourceFlag::Default) != SourceFlag::None) {
         count += DefaultMiiCount;
     }
-    return count;
+    return static_cast<u32>(count);
 }
 
 ResultVal<MiiInfo> MiiManager::UpdateLatest([[maybe_unused]] const MiiInfo& info,
diff --git a/src/core/hle/service/sockets/sockets_translate.cpp b/src/core/hle/service/sockets/sockets_translate.cpp
index 139743e1d..2e626fd86 100644
--- a/src/core/hle/service/sockets/sockets_translate.cpp
+++ b/src/core/hle/service/sockets/sockets_translate.cpp
@@ -89,9 +89,9 @@ Network::Protocol Translate(Type type, Protocol protocol) {
     }
 }
 
-u16 TranslatePollEventsToHost(u16 flags) {
-    u16 result = 0;
-    const auto translate = [&result, &flags](u16 from, u16 to) {
+u16 TranslatePollEventsToHost(u32 flags) {
+    u32 result = 0;
+    const auto translate = [&result, &flags](u32 from, u32 to) {
         if ((flags & from) != 0) {
             flags &= ~from;
             result |= to;
@@ -105,12 +105,12 @@ u16 TranslatePollEventsToHost(u16 flags) {
     translate(POLL_NVAL, Network::POLL_NVAL);
 
     UNIMPLEMENTED_IF_MSG(flags != 0, "Unimplemented flags={}", flags);
-    return result;
+    return static_cast<u16>(result);
 }
 
-u16 TranslatePollEventsToGuest(u16 flags) {
-    u16 result = 0;
-    const auto translate = [&result, &flags](u16 from, u16 to) {
+u16 TranslatePollEventsToGuest(u32 flags) {
+    u32 result = 0;
+    const auto translate = [&result, &flags](u32 from, u32 to) {
         if ((flags & from) != 0) {
             flags &= ~from;
             result |= to;
@@ -125,7 +125,7 @@ u16 TranslatePollEventsToGuest(u16 flags) {
     translate(Network::POLL_NVAL, POLL_NVAL);
 
     UNIMPLEMENTED_IF_MSG(flags != 0, "Unimplemented flags={}", flags);
-    return result;
+    return static_cast<u16>(result);
 }
 
 Network::SockAddrIn Translate(SockAddrIn value) {
diff --git a/src/core/hle/service/sockets/sockets_translate.h b/src/core/hle/service/sockets/sockets_translate.h
index 8ed041e31..e498913d4 100644
--- a/src/core/hle/service/sockets/sockets_translate.h
+++ b/src/core/hle/service/sockets/sockets_translate.h
@@ -31,10 +31,10 @@ Network::Type Translate(Type type);
 Network::Protocol Translate(Type type, Protocol protocol);
 
 /// Translate abstract poll event flags to guest poll event flags
-u16 TranslatePollEventsToHost(u16 flags);
+u16 TranslatePollEventsToHost(u32 flags);
 
 /// Translate guest poll event flags to abstract poll event flags
-u16 TranslatePollEventsToGuest(u16 flags);
+u16 TranslatePollEventsToGuest(u32 flags);
 
 /// Translate guest socket address structure to abstract socket address structure
 Network::SockAddrIn Translate(SockAddrIn value);
diff --git a/src/core/hle/service/time/time_zone_manager.cpp b/src/core/hle/service/time/time_zone_manager.cpp
index 69152d0ac..bdf0439f2 100644
--- a/src/core/hle/service/time/time_zone_manager.cpp
+++ b/src/core/hle/service/time/time_zone_manager.cpp
@@ -820,7 +820,10 @@ static ResultCode ToCalendarTimeImpl(const TimeZoneRule& rules, s64 time, Calend
     const ResultCode result{
         ToCalendarTimeInternal(rules, time, calendar_time, calendar.additiona_info)};
     calendar.time.year = static_cast<s16>(calendar_time.year);
-    calendar.time.month = calendar_time.month + 1; // Internal impl. uses 0-indexed month
+
+    // Internal impl. uses 0-indexed month
+    calendar.time.month = static_cast<s8>(calendar_time.month + 1);
+
     calendar.time.day = calendar_time.day;
     calendar.time.hour = calendar_time.hour;
     calendar.time.minute = calendar_time.minute;
@@ -872,13 +875,15 @@ ResultCode TimeZoneManager::ToPosixTime(const TimeZoneRule& rules,
                                         const CalendarTime& calendar_time, s64& posix_time) const {
     posix_time = 0;
 
-    CalendarTimeInternal internal_time{};
-    internal_time.year = calendar_time.year;
-    internal_time.month = calendar_time.month - 1; // Internal impl. uses 0-indexed month
-    internal_time.day = calendar_time.day;
-    internal_time.hour = calendar_time.hour;
-    internal_time.minute = calendar_time.minute;
-    internal_time.second = calendar_time.second;
+    CalendarTimeInternal internal_time{
+        .year = calendar_time.year,
+        // Internal impl. uses 0-indexed month
+        .month = static_cast<s8>(calendar_time.month - 1),
+        .day = calendar_time.day,
+        .hour = calendar_time.hour,
+        .minute = calendar_time.minute,
+        .second = calendar_time.second,
+    };
 
     s32 hour{internal_time.hour};
     s32 minute{internal_time.minute};
diff --git a/src/core/hle/service/vi/vi.cpp b/src/core/hle/service/vi/vi.cpp
index 480d34725..d380c60fb 100644
--- a/src/core/hle/service/vi/vi.cpp
+++ b/src/core/hle/service/vi/vi.cpp
@@ -159,7 +159,7 @@ public:
         header.data_size = static_cast<u32_le>(write_index - sizeof(Header));
         header.data_offset = sizeof(Header);
         header.objects_size = 4;
-        header.objects_offset = sizeof(Header) + header.data_size;
+        header.objects_offset = static_cast<u32>(sizeof(Header) + header.data_size);
         std::memcpy(buffer.data(), &header, sizeof(Header));
 
         return buffer;
diff --git a/src/core/loader/kip.cpp b/src/core/loader/kip.cpp
index 5981bcd21..2a905d3e4 100644
--- a/src/core/loader/kip.cpp
+++ b/src/core/loader/kip.cpp
@@ -16,7 +16,7 @@ namespace Loader {
 
 namespace {
 constexpr u32 PageAlignSize(u32 size) {
-    return (size + Core::Memory::PAGE_MASK) & ~Core::Memory::PAGE_MASK;
+    return static_cast<u32>((size + Core::Memory::PAGE_MASK) & ~Core::Memory::PAGE_MASK);
 }
 } // Anonymous namespace
 
diff --git a/src/core/loader/nro.cpp b/src/core/loader/nro.cpp
index 9fb5eddad..5f4b3104b 100644
--- a/src/core/loader/nro.cpp
+++ b/src/core/loader/nro.cpp
@@ -127,7 +127,7 @@ FileType AppLoader_NRO::IdentifyType(const FileSys::VirtualFile& file) {
 }
 
 static constexpr u32 PageAlignSize(u32 size) {
-    return (size + Core::Memory::PAGE_MASK) & ~Core::Memory::PAGE_MASK;
+    return static_cast<u32>((size + Core::Memory::PAGE_MASK) & ~Core::Memory::PAGE_MASK);
 }
 
 static bool LoadNroImpl(Kernel::Process& process, const std::vector<u8>& data,
diff --git a/src/core/loader/nso.cpp b/src/core/loader/nso.cpp
index 1e70f6e11..497f438a1 100644
--- a/src/core/loader/nso.cpp
+++ b/src/core/loader/nso.cpp
@@ -47,7 +47,7 @@ std::vector<u8> DecompressSegment(const std::vector<u8>& compressed_data,
 }
 
 constexpr u32 PageAlignSize(u32 size) {
-    return (size + Core::Memory::PAGE_MASK) & ~Core::Memory::PAGE_MASK;
+    return static_cast<u32>((size + Core::Memory::PAGE_MASK) & ~Core::Memory::PAGE_MASK);
 }
 } // Anonymous namespace
 
diff --git a/src/core/loader/nso.h b/src/core/loader/nso.h
index 4bd47787d..d331096ae 100644
--- a/src/core/loader/nso.h
+++ b/src/core/loader/nso.h
@@ -59,7 +59,7 @@ struct NSOHeader {
 static_assert(sizeof(NSOHeader) == 0x100, "NSOHeader has incorrect size.");
 static_assert(std::is_trivially_copyable_v<NSOHeader>, "NSOHeader must be trivially copyable.");
 
-constexpr u64 NSO_ARGUMENT_DATA_ALLOCATION_SIZE = 0x9000;
+constexpr u32 NSO_ARGUMENT_DATA_ALLOCATION_SIZE = 0x9000;
 
 struct NSOArgumentHeader {
     u32_le allocated_size;
diff --git a/src/core/memory.cpp b/src/core/memory.cpp
index c3f4829d7..b88aa5c40 100644
--- a/src/core/memory.cpp
+++ b/src/core/memory.cpp
@@ -120,9 +120,9 @@ struct Memory::Impl {
         if ((addr & 1) == 0) {
             return Read<u16_le>(addr);
         } else {
-            const u8 a{Read<u8>(addr)};
-            const u8 b{Read<u8>(addr + sizeof(u8))};
-            return (static_cast<u16>(b) << 8) | a;
+            const u32 a{Read<u8>(addr)};
+            const u32 b{Read<u8>(addr + sizeof(u8))};
+            return static_cast<u16>((b << 8) | a);
         }
     }
 
@@ -130,9 +130,9 @@ struct Memory::Impl {
         if ((addr & 3) == 0) {
             return Read<u32_le>(addr);
         } else {
-            const u16 a{Read16(addr)};
-            const u16 b{Read16(addr + sizeof(u16))};
-            return (static_cast<u32>(b) << 16) | a;
+            const u32 a{Read16(addr)};
+            const u32 b{Read16(addr + sizeof(u16))};
+            return (b << 16) | a;
         }
     }
 
diff --git a/src/core/memory/cheat_engine.cpp b/src/core/memory/cheat_engine.cpp
index 29284a42d..2dd0eb0f8 100644
--- a/src/core/memory/cheat_engine.cpp
+++ b/src/core/memory/cheat_engine.cpp
@@ -153,8 +153,9 @@ std::vector<CheatEntry> TextCheatParser::Parse(std::string_view data) const {
                 return {};
             }
 
+            const auto value = static_cast<u32>(std::stoul(hex, nullptr, 0x10));
             out[*current_entry].definition.opcodes[out[*current_entry].definition.num_opcodes++] =
-                std::stoul(hex, nullptr, 0x10);
+                value;
 
             i += 8;
         } else {
diff --git a/src/core/network/network.cpp b/src/core/network/network.cpp
index 56d173b5e..4b3bb4366 100644
--- a/src/core/network/network.cpp
+++ b/src/core/network/network.cpp
@@ -238,14 +238,14 @@ SockAddrIn TranslateToSockAddrIn(sockaddr input_) {
     return result;
 }
 
-u16 TranslatePollEvents(u16 events) {
-    u16 result = 0;
+u16 TranslatePollEvents(u32 events) {
+    u32 result = 0;
 
-    if (events & POLL_IN) {
+    if ((events & POLL_IN) != 0) {
         events &= ~POLL_IN;
         result |= POLLIN;
     }
-    if (events & POLL_PRI) {
+    if ((events & POLL_PRI) != 0) {
         events &= ~POLL_PRI;
 #ifdef _WIN32
         LOG_WARNING(Service, "Winsock doesn't support POLLPRI");
@@ -253,20 +253,20 @@ u16 TranslatePollEvents(u16 events) {
         result |= POLL_PRI;
 #endif
     }
-    if (events & POLL_OUT) {
+    if ((events & POLL_OUT) != 0) {
         events &= ~POLL_OUT;
         result |= POLLOUT;
     }
 
     UNIMPLEMENTED_IF_MSG(events != 0, "Unhandled guest events=0x{:x}", events);
 
-    return result;
+    return static_cast<u16>(result);
 }
 
-u16 TranslatePollRevents(u16 revents) {
-    u16 result = 0;
-    const auto translate = [&result, &revents](int host, unsigned guest) {
-        if (revents & host) {
+u16 TranslatePollRevents(u32 revents) {
+    u32 result = 0;
+    const auto translate = [&result, &revents](u32 host, u32 guest) {
+        if ((revents & host) != 0) {
             revents &= ~host;
             result |= guest;
         }
@@ -280,7 +280,7 @@ u16 TranslatePollRevents(u16 revents) {
 
     UNIMPLEMENTED_IF_MSG(revents != 0, "Unhandled host revents=0x{:x}", revents);
 
-    return result;
+    return static_cast<u16>(result);
 }
 
 template <typename T>
@@ -350,7 +350,7 @@ std::pair<s32, Errno> Poll(std::vector<PollFD>& pollfds, s32 timeout) {
     }
 
     for (size_t i = 0; i < num; ++i) {
-        pollfds[i].revents = TranslatePollRevents(host_pollfds[i].revents);
+        pollfds[i].revents = TranslatePollRevents(static_cast<u32>(host_pollfds[i].revents));
     }
 
     if (result > 0) {
@@ -408,7 +408,7 @@ std::pair<Socket::AcceptResult, Errno> Socket::Accept() {
 
 Errno Socket::Connect(SockAddrIn addr_in) {
     const sockaddr host_addr_in = TranslateFromSockAddrIn(addr_in);
-    if (connect(fd, &host_addr_in, sizeof(host_addr_in)) != INVALID_SOCKET) {
+    if (connect(fd, &host_addr_in, sizeof(host_addr_in)) != SOCKET_ERROR) {
         return Errno::SUCCESS;
     }
 
@@ -503,10 +503,10 @@ std::pair<s32, Errno> Socket::Recv(int flags, std::vector<u8>& message) {
     ASSERT(flags == 0);
     ASSERT(message.size() < static_cast<size_t>(std::numeric_limits<int>::max()));
 
-    const int result =
+    const auto result =
         recv(fd, reinterpret_cast<char*>(message.data()), static_cast<int>(message.size()), 0);
     if (result != SOCKET_ERROR) {
-        return {result, Errno::SUCCESS};
+        return {static_cast<s32>(result), Errno::SUCCESS};
     }
 
     switch (const int ec = LastError()) {
@@ -531,14 +531,14 @@ std::pair<s32, Errno> Socket::RecvFrom(int flags, std::vector<u8>& message, Sock
     socklen_t* const p_addrlen = addr ? &addrlen : nullptr;
     sockaddr* const p_addr_in = addr ? &addr_in : nullptr;
 
-    const int result = recvfrom(fd, reinterpret_cast<char*>(message.data()),
-                                static_cast<int>(message.size()), 0, p_addr_in, p_addrlen);
+    const auto result = recvfrom(fd, reinterpret_cast<char*>(message.data()),
+                                 static_cast<int>(message.size()), 0, p_addr_in, p_addrlen);
     if (result != SOCKET_ERROR) {
         if (addr) {
             ASSERT(addrlen == sizeof(addr_in));
             *addr = TranslateToSockAddrIn(addr_in);
         }
-        return {result, Errno::SUCCESS};
+        return {static_cast<s32>(result), Errno::SUCCESS};
     }
 
     switch (const int ec = LastError()) {
@@ -558,10 +558,10 @@ std::pair<s32, Errno> Socket::Send(const std::vector<u8>& message, int flags) {
     ASSERT(message.size() < static_cast<size_t>(std::numeric_limits<int>::max()));
     ASSERT(flags == 0);
 
-    const int result = send(fd, reinterpret_cast<const char*>(message.data()),
-                            static_cast<int>(message.size()), 0);
+    const auto result = send(fd, reinterpret_cast<const char*>(message.data()),
+                             static_cast<int>(message.size()), 0);
     if (result != SOCKET_ERROR) {
-        return {result, Errno::SUCCESS};
+        return {static_cast<s32>(result), Errno::SUCCESS};
     }
 
     const int ec = LastError();
@@ -591,10 +591,10 @@ std::pair<s32, Errno> Socket::SendTo(u32 flags, const std::vector<u8>& message,
         to = &host_addr_in;
     }
 
-    const int result = sendto(fd, reinterpret_cast<const char*>(message.data()),
-                              static_cast<int>(message.size()), 0, to, tolen);
+    const auto result = sendto(fd, reinterpret_cast<const char*>(message.data()),
+                               static_cast<int>(message.size()), 0, to, tolen);
     if (result != SOCKET_ERROR) {
-        return {result, Errno::SUCCESS};
+        return {static_cast<s32>(result), Errno::SUCCESS};
     }
 
     const int ec = LastError();