From 6f96d438602fa907d86853c423e0395b0ec24ca8 Mon Sep 17 00:00:00 2001
From: Fish <fish@cs.ucsb.edu>
Date: Sat, 1 Feb 2020 15:00:16 -0700
Subject: [PATCH] AMD64: Support lifting cmpsb.

---
 priv/guest_amd64_toIR.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/priv/guest_amd64_toIR.c b/priv/guest_amd64_toIR.c
index 0591231df..a85bd7aa0 100644
--- a/priv/guest_amd64_toIR.c
+++ b/priv/guest_amd64_toIR.c
@@ -20972,6 +20972,13 @@ Long dis_ESC_NONE (
          dres->whatNext = Dis_StopHere;
          return delta;
       }
+      /* A6/A7: cmps{b,w,l,q} */
+      if (!haveF3(pfx) && !haveF2(pfx)) {
+         if (opc == 0xA6)
+            sz = 1;
+         dis_string_op( dis_CMPS, sz, "cmps", pfx );
+         return delta;
+      }
       goto decode_failure;
 
    case 0xAA: