From 4962d92b79cc96032d669d8305269acd59290e57 Mon Sep 17 00:00:00 2001
From: MerryMage <MerryMage@users.noreply.github.com>
Date: Sun, 11 Dec 2016 15:36:58 +0000
Subject: [PATCH] block_of_code: Do not regenerate prelude when clearing cache

---
 src/backend_x64/block_of_code.cpp | 12 +++++-------
 src/backend_x64/block_of_code.h   |  1 +
 2 files changed, 6 insertions(+), 7 deletions(-)

diff --git a/src/backend_x64/block_of_code.cpp b/src/backend_x64/block_of_code.cpp
index 738c47cf..c6f542b8 100644
--- a/src/backend_x64/block_of_code.cpp
+++ b/src/backend_x64/block_of_code.cpp
@@ -19,17 +19,15 @@ namespace Dynarmic {
 namespace BackendX64 {
 
 BlockOfCode::BlockOfCode(UserCallbacks cb) : Xbyak::CodeGenerator(128 * 1024 * 1024), cb(cb) {
-    ClearCache();
-}
-
-void BlockOfCode::ClearCache() {
-    consts.~Consts();
-    new (&consts) Consts();
-    reset();
     GenConstants();
     GenRunCode();
     GenReturnFromRunCode();
     GenMemoryAccessors();
+    user_code_begin = getCurr<CodePtr>();
+}
+
+void BlockOfCode::ClearCache() {
+    SetCodePtr(user_code_begin);
 }
 
 size_t BlockOfCode::RunCode(JitState* jit_state, CodePtr basic_block, size_t cycles_to_run) const {
diff --git a/src/backend_x64/block_of_code.h b/src/backend_x64/block_of_code.h
index 1db798d5..b9180420 100644
--- a/src/backend_x64/block_of_code.h
+++ b/src/backend_x64/block_of_code.h
@@ -147,6 +147,7 @@ public:
 
 private:
     UserCallbacks cb;
+    CodePtr user_code_begin;
 
     struct Consts {
         Xbyak::Label FloatPositiveZero32;