From 2218462ff225670991b02eb696a7b222995ba3cf Mon Sep 17 00:00:00 2001
From: Joshua Ashton <joshua@froggi.es>
Date: Tue, 13 Sep 2022 18:50:19 +0100
Subject: [PATCH] [util] Implement spin on ARM64

---
 src/util/sync/sync_spinlock.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/util/sync/sync_spinlock.h b/src/util/sync/sync_spinlock.h
index 27157929f..a04c79258 100644
--- a/src/util/sync/sync_spinlock.h
+++ b/src/util/sync/sync_spinlock.h
@@ -21,7 +21,13 @@ namespace dxvk::sync {
   void spin(uint32_t spinCount, const Fn& fn) {
     while (unlikely(!fn())) {
       for (uint32_t i = 1; i < spinCount; i++) {
+        #if defined(DXVK_ARCH_X86)
         _mm_pause();
+        #elif defined(DXVK_ARCH_ARM64)
+        __asm__ __volatile__ ("yield");
+        #else
+        #error "Pause/Yield not implemented for this architecture."
+        #endif
         if (fn())
           return;
       }