From d7abae1e3122192a99af019ea83788221e3d64b6 Mon Sep 17 00:00:00 2001
From: Fernando Sahmkow <fsahmkow27@gmail.com>
Date: Sun, 5 Apr 2020 12:11:36 -0400
Subject: [PATCH] A64: Implement Exceptional Exit.

---
 include/dynarmic/A64/a64.h        |  6 ++++++
 src/backend/x64/a64_interface.cpp | 13 +++++++++++++
 2 files changed, 19 insertions(+)

diff --git a/include/dynarmic/A64/a64.h b/include/dynarmic/A64/a64.h
index 5a84e4e0..2e9fe15a 100644
--- a/include/dynarmic/A64/a64.h
+++ b/include/dynarmic/A64/a64.h
@@ -60,6 +60,12 @@ public:
      */
     void HaltExecution();
 
+    /**
+     * Exits execution from a callback, the callback must rewind the stack or
+     * never return to dynarmic from it's current stack.
+     */
+    void ExceptionalExit();
+
     /// Read Stack Pointer
     std::uint64_t GetSP() const;
     /// Modify Stack Pointer
diff --git a/src/backend/x64/a64_interface.cpp b/src/backend/x64/a64_interface.cpp
index cf58f281..05a76478 100644
--- a/src/backend/x64/a64_interface.cpp
+++ b/src/backend/x64/a64_interface.cpp
@@ -83,6 +83,15 @@ public:
         PerformRequestedCacheInvalidation();
     }
 
+    void ExceptionalExit() {
+        if (!conf.wall_clock_cntpct) {
+            const s64 ticks = jit_state.cycles_to_run - jit_state.cycles_remaining;
+            conf.callbacks->AddTicks(ticks);
+        }
+        PerformRequestedCacheInvalidation();
+        is_executing = false;
+    }
+
     void ClearCache() {
         invalidate_entire_cache = true;
         RequestCacheInvalidation();
@@ -313,6 +322,10 @@ void Jit::HaltExecution() {
     impl->HaltExecution();
 }
 
+void Jit::ExceptionalExit() {
+    impl->ExceptionalExit();
+}
+
 u64 Jit::GetSP() const {
     return impl->GetSP();
 }