commit 5343bb38f44897fcb179b4756d75294719d75fbb
Author: mjw <mjw@8f6e269a-dfd6-0310-a8e1-e2731360e62c>
Date:   Sat Oct 11 19:13:35 2014 +0000

    Bug 339858 arm64 recognize dmb sy. Data Memory Barrier full SYstem variant.
    
    git-svn-id: svn://svn.valgrind.org/vex/trunk@2975 8f6e269a-dfd6-0310-a8e1-e2731360e62c

diff --git a/VEX/priv/guest_arm64_toIR.c b/VEX/priv/guest_arm64_toIR.c
index 2aa145c..5ebe0a6 100644
--- a/VEX/priv/guest_arm64_toIR.c
+++ b/VEX/priv/guest_arm64_toIR.c
@@ -5537,6 +5537,11 @@ Bool dis_ARM64_branch_etc(/*MB_OUT*/DisResult* dres, UInt insn,
       DIP("isb\n");
       return True;
    }
+   if (INSN(31,0) == 0xD5033FBF) {
+      stmt(IRStmt_MBE(Imbe_Fence));
+      DIP("dmb sy\n");
+      return True;
+   }
    if (INSN(31,0) == 0xD5033BBF) {
       stmt(IRStmt_MBE(Imbe_Fence));
       DIP("dmb ish\n");