From 8d3ca7466449a4c0a40cee34a899d29ef2b145c5 Mon Sep 17 00:00:00 2001
From: MrPurple666 <antoniosacramento666usa@gmail.com>
Date: Wed, 30 Apr 2025 16:11:15 -0300
Subject: [PATCH] Use a different approach for the LRU toggle

---
 src/core/arm/nce/lru_cache.h |  3 +++
 src/core/arm/nce/patcher.cpp |  2 ++
 src/core/arm/nce/patcher.h   | 27 ++++++++++++++++++---------
 3 files changed, 23 insertions(+), 9 deletions(-)

diff --git a/src/core/arm/nce/lru_cache.h b/src/core/arm/nce/lru_cache.h
index 70f5163947..aacab368c4 100644
--- a/src/core/arm/nce/lru_cache.h
+++ b/src/core/arm/nce/lru_cache.h
@@ -3,6 +3,7 @@
 #include <list>
 #include <unordered_map>
 #include <optional>
+#include "common/logging/log.h"
 
 template<typename KeyType, typename ValueType>
 class LRUCache {
@@ -15,6 +16,7 @@ private:
 public:
     explicit LRUCache(size_t capacity, bool enabled = true) : enabled(enabled), capacity(capacity) {
         cache_map.reserve(capacity);
+        LOG_WARNING(Core, "LRU Cache initialized with state: {}", enabled ? "enabled" : "disabled");
     }
 
     // Returns pointer to value if found, nullptr otherwise
@@ -67,6 +69,7 @@ public:
     // Enable or disable the LRU cache
     void setEnabled(bool state) {
         enabled = state;
+        LOG_WARNING(Core, "LRU Cache state changed to: {}", state ? "enabled" : "disabled");
         if (!enabled) {
             clear();
         }
diff --git a/src/core/arm/nce/patcher.cpp b/src/core/arm/nce/patcher.cpp
index c7285e3a08..f6563bb20f 100644
--- a/src/core/arm/nce/patcher.cpp
+++ b/src/core/arm/nce/patcher.cpp
@@ -23,6 +23,8 @@ constexpr size_t MaxRelativeBranch = 128_MiB;
 constexpr u32 ModuleCodeIndex = 0x24 / sizeof(u32);
 
 Patcher::Patcher() : c(m_patch_instructions) {
+    LOG_WARNING(Core_ARM, "Patcher initialized with LRU cache {}",
+        patch_cache.isEnabled() ? "enabled" : "disabled");
     // The first word of the patch section is always a branch to the first instruction of the
     // module.
     c.dw(0);
diff --git a/src/core/arm/nce/patcher.h b/src/core/arm/nce/patcher.h
index c8c2ac7326..8e6363b2d5 100644
--- a/src/core/arm/nce/patcher.h
+++ b/src/core/arm/nce/patcher.h
@@ -66,16 +66,25 @@ private:
     LRUCache<uintptr_t, PatchTextAddress> patch_cache{CACHE_SIZE, Settings::values.lru_cache_enabled.GetValue()};
 
     void BranchToPatch(uintptr_t module_dest) {
-        // Try to get existing patch entry from cache
-        if (auto* cached_patch = patch_cache.get(module_dest)) {
-            curr_patch->m_branch_to_patch_relocations.push_back({c.offset(), *cached_patch});
-            return;
-        }
+        if (patch_cache.isEnabled()) {
+            LOG_DEBUG(Core_ARM, "LRU cache lookup for address {:#x}", module_dest);
+            // Try to get existing patch entry from cache
+            if (auto* cached_patch = patch_cache.get(module_dest)) {
+                LOG_DEBUG(Core_ARM, "LRU cache hit for address {:#x}", module_dest);
+                curr_patch->m_branch_to_patch_relocations.push_back({c.offset(), *cached_patch});
+                return;
+            }
+            LOG_DEBUG(Core_ARM, "LRU cache miss for address {:#x}, creating new patch", module_dest);
 
-        // If not in cache, create new entry and cache it
-        const auto patch_addr = c.offset();
-        curr_patch->m_branch_to_patch_relocations.push_back({patch_addr, module_dest});
-        patch_cache.put(module_dest, patch_addr);
+            // If not in cache, create new entry and cache it
+            const auto patch_addr = c.offset();
+            curr_patch->m_branch_to_patch_relocations.push_back({patch_addr, module_dest});
+            patch_cache.put(module_dest, patch_addr);
+        } else {
+            LOG_DEBUG(Core_ARM, "LRU cache disabled - creating direct patch for address {:#x}", module_dest);
+            // LRU disabled - use pre-LRU approach
+            curr_patch->m_branch_to_patch_relocations.push_back({c.offset(), module_dest});
+        }
     }
 
     void BranchToModule(uintptr_t module_dest) {