From 909b1b29806de8adcd67b115c219b14acb3a61e3 Mon Sep 17 00:00:00 2001
From: Gleb Balykov <g.balykov@samsung.com>
Date: Mon, 28 Jun 2021 21:16:44 +0300
Subject: [PATCH] Add YieldProcessor implementation for arm (#54829)

---
 src/coreclr/gc/env/gcenv.base.h | 9 ++-------
 src/coreclr/pal/inc/pal.h       | 2 +-
 2 files changed, 3 insertions(+), 8 deletions(-)

diff --git a/src/coreclr/gc/env/gcenv.base.h b/src/coreclr/gc/env/gcenv.base.h
index 0aa1d0bd673..59eb74862f5 100644
--- a/src/coreclr/gc/env/gcenv.base.h
+++ b/src/coreclr/gc/env/gcenv.base.h
@@ -227,15 +227,10 @@ typedef DWORD (WINAPI *PTHREAD_START_ROUTINE)(void* lpThreadParameter);
 
 #endif // defined(__i386__) || defined(__x86_64__)
 
-#ifdef __aarch64__
+#if defined(__arm__) || defined(__aarch64__)
  #define YieldProcessor() asm volatile ("yield")
  #define MemoryBarrier __sync_synchronize
-#endif // __aarch64__
-
-#ifdef __arm__
- #define YieldProcessor()
- #define MemoryBarrier __sync_synchronize
-#endif // __arm__
+#endif // __arm__ || __aarch64__
 
 #endif // _MSC_VER
 
diff --git a/src/coreclr/pal/inc/pal.h b/src/coreclr/pal/inc/pal.h
index 8e0553e02e8..532c3e82d3d 100644
--- a/src/coreclr/pal/inc/pal.h
+++ b/src/coreclr/pal/inc/pal.h
@@ -3582,7 +3582,7 @@ YieldProcessor()
     __asm__ __volatile__(
         "rep\n"
         "nop");
-#elif defined(HOST_ARM64)
+#elif defined(HOST_ARM) || defined(HOST_ARM64)
     __asm__ __volatile__( "yield");
 #else
     return;
-- 
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