diff -r fcad92f425c5 -r 56bf71d64d51 src/hotspot/os_cpu/bsd_x86/atomic_bsd_x86.hpp
--- a/src/hotspot/os_cpu/bsd_x86/atomic_bsd_x86.hpp	Mon Nov 25 14:06:13 2019 +0100
+++ b/src/hotspot/os_cpu/bsd_x86/atomic_bsd_x86.hpp	Mon Nov 25 12:22:13 2019 +0100
@@ -169,4 +169,54 @@
 
 #endif // AMD64
 
+template<>
+struct Atomic::PlatformOrderedStore<1, RELEASE_X_FENCE>
+{
+  template <typename T>
+  void operator()(T v, volatile T* p) const {
+    __asm__ volatile (  "xchgb (%2),%0"
+                      : "=q" (v)
+                      : "0" (v), "r" (p)
+                      : "memory");
+  }
+};
+
+template<>
+struct Atomic::PlatformOrderedStore<2, RELEASE_X_FENCE>
+{
+  template <typename T>
+  void operator()(T v, volatile T* p) const {
+    __asm__ volatile (  "xchgw (%2),%0"
+                      : "=r" (v)
+                      : "0" (v), "r" (p)
+                      : "memory");
+  }
+};
+
+template<>
+struct Atomic::PlatformOrderedStore<4, RELEASE_X_FENCE>
+{
+  template <typename T>
+  void operator()(T v, volatile T* p) const {
+    __asm__ volatile (  "xchgl (%2),%0"
+                      : "=r" (v)
+                      : "0" (v), "r" (p)
+                      : "memory");
+  }
+};
+
+#ifdef AMD64
+template<>
+struct Atomic::PlatformOrderedStore<8, RELEASE_X_FENCE>
+{
+  template <typename T>
+  void operator()(T v, volatile T* p) const {
+    __asm__ volatile (  "xchgq (%2), %0"
+                      : "=r" (v)
+                      : "0" (v), "r" (p)
+                      : "memory");
+  }
+};
+#endif // AMD64
+
 #endif // OS_CPU_BSD_X86_ATOMIC_BSD_X86_HPP