commit a52e37e8547ed42060a262d510047eea202dbe9f
author sewardj <sewardj@8f6e269a-dfd6-0310-a8e1-e2731360e62c> Thu Apr 28 18:48:06 2011 +0000
committer sewardj <sewardj@8f6e269a-dfd6-0310-a8e1-e2731360e62c> Thu Apr 28 18:48:06 2011 +0000
tree 82177d352367018e3cdf42c193819b5324facaeb
parent a970c40221084035bab72261d9b3a156ff1938a5

s390x: Implement Ist_MBE
VEX IR provides the statement Ist_MBE which is used to implement memory
barriers (Imbe_Fence). We use this statement to implement serialization which
is similar.
Fixes #271385.  (Florian Krohm, britzel@acm.org)



git-svn-id: svn://svn.valgrind.org/vex/trunk@2134 8f6e269a-dfd6-0310-a8e1-e2731360e62c

priv/guest_s390_toIR.c

diff --git a/priv/guest_s390_toIR.c b/priv/guest_s390_toIR.c
index 73081ef..722f0ea 100644
--- a/priv/guest_s390_toIR.c
+++ b/priv/guest_s390_toIR.c
@@ -3059,6 +3059,10 @@
 {
    IRTemp cond = newTemp(Ity_I32);
 
+   if (r2 == 0 && (r1 >= 14)) {    /* serialization */
+      stmt(IRStmt_MBE(Imbe_Fence));
+   }
+
    if ((r2 == 0) || (r1 == 0)) {
    } else {
       if (r1 == 15) {