commit cbc52cfe6658f89f6857febf2b1e5c9edab7f397
Author: carll <carll@8f6e269a-dfd6-0310-a8e1-e2731360e62c>
Date:   Wed Sep 16 23:01:04 2015 +0000

    Add support for the Power PC mbar instruction.
    
    This patch fixes bugzilla 352768.
    
    
    git-svn-id: svn://svn.valgrind.org/vex/trunk@3190 8f6e269a-dfd6-0310-a8e1-e2731360e62c

diff --git a/VEX/priv/guest_ppc_toIR.c b/VEX/priv/guest_ppc_toIR.c
index a0ee34a..6a0b6d8 100644
--- a/VEX/priv/guest_ppc_toIR.c
+++ b/VEX/priv/guest_ppc_toIR.c
@@ -6369,6 +6369,7 @@ static Bool dis_memsync ( UInt theInstr )
    UInt  b11to25 = IFIELD(theInstr, 11, 15);
    UChar flag_L  = ifieldRegDS(theInstr);
    UInt  b11to20 = IFIELD(theInstr, 11, 10);
+   UInt  M0      = IFIELD(theInstr, 11, 5);
    UChar rD_addr = ifieldRegDS(theInstr);
    UChar rS_addr = rD_addr;
    UChar rA_addr = ifieldRegA(theInstr);
@@ -6399,12 +6400,20 @@ static Bool dis_memsync ( UInt theInstr )
    /* X-Form */
    case 0x1F:
       switch (opc2) {
-      case 0x356: // eieio (Enforce In-Order Exec of I/O, PPC32 p394)
-         if (b11to25 != 0 || b0 != 0) {
-            vex_printf("dis_memsync(ppc)(eiei0,b11to25|b0)\n");
-            return False;
+      case 0x356: // eieio or mbar (Enforce In-Order Exec of I/O, PPC32 p394)
+         if (M0 == 0) {
+            if (b11to20 != 0 || b0 != 0) {
+               vex_printf("dis_memsync(ppc)(eieio,b11to20|b0)\n");
+               return False;
+            }
+            DIP("eieio\n");
+         } else {
+            if (b11to20 != 0 || b0 != 0) {
+               vex_printf("dis_memsync(ppc)(mbar,b11to20|b0)\n");
+               return False;
+            }
+            DIP("mbar %d\n", M0);
          }
-         DIP("eieio\n");
          /* Insert a memory fence, just to be on the safe side. */
          stmt( IRStmt_MBE(Imbe_Fence) );
          break;