--- a/hotspot/src/cpu/ppc/vm/c1_LIRAssembler_ppc.cpp	Fri May 13 06:36:52 2016 +0000
+++ b/hotspot/src/cpu/ppc/vm/c1_LIRAssembler_ppc.cpp	Fri May 13 22:21:54 2016 +0300
@@ -2563,15 +2563,21 @@
 
   if (is_64bit) {
     __ cmpxchgd(BOOL_RESULT, /*current_value=*/R0, cmp_value, new_value, addr,
-                MacroAssembler::MemBarFenceAfter,
+                MacroAssembler::MemBarNone,
                 MacroAssembler::cmpxchgx_hint_atomic_update(),
                 noreg, NULL, /*check without ldarx first*/true);
   } else {
     __ cmpxchgw(BOOL_RESULT, /*current_value=*/R0, cmp_value, new_value, addr,
-                MacroAssembler::MemBarFenceAfter,
+                MacroAssembler::MemBarNone,
                 MacroAssembler::cmpxchgx_hint_atomic_update(),
                 noreg, /*check without ldarx first*/true);
   }
+
+  if (support_IRIW_for_not_multiple_copy_atomic_cpu) {
+    __ isync();
+  } else {
+    __ sync();
+  }
 }