ART: Mips64 runtime support

Interpret-only Mips64 runtime support.

Change-Id: Iee22d0c8c77105d9b2f03a67dc4e09957fe0ab0a
diff --git a/runtime/atomic.h b/runtime/atomic.h
index cf61277..87de506 100644
--- a/runtime/atomic.h
+++ b/runtime/atomic.h
@@ -46,6 +46,9 @@
 class QuasiAtomic {
 #if defined(__mips__) && !defined(__LP64__)
   static constexpr bool kNeedSwapMutexes = true;
+#elif defined(__mips__) && defined(__LP64__)
+  // TODO - mips64 still need this for Cas64 ???
+  static constexpr bool kNeedSwapMutexes = true;
 #else
   static constexpr bool kNeedSwapMutexes = false;
 #endif