From a0b4ea2aeca3f0686c0f7662356608ef189c39a7 Mon Sep 17 00:00:00 2001
From: mdkinney <mdkinney@6f19259b-4bc3-4df7-8a09-765794883524>
Date: Sat, 22 Sep 2007 16:55:58 +0000
Subject: [PATCH] Fix bug in backward copy for x64

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@3913 6f19259b-4bc3-4df7-8a09-765794883524
---
 MdePkg/Library/BaseMemoryLibRepStr/x64/CopyMem.asm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/MdePkg/Library/BaseMemoryLibRepStr/x64/CopyMem.asm b/MdePkg/Library/BaseMemoryLibRepStr/x64/CopyMem.asm
index a2e04056fd..c2b5d6f92f 100644
--- a/MdePkg/Library/BaseMemoryLibRepStr/x64/CopyMem.asm
+++ b/MdePkg/Library/BaseMemoryLibRepStr/x64/CopyMem.asm
@@ -39,7 +39,7 @@ InternalMemCopyMem  PROC    USES    rsi rdi
     cmp     rsi, rdi
     mov     rax, rdi                    ; rax <- Destination as return value
     jae     @F
-    cmp     r9, rsi
+    cmp     r9, rdi
     jae     @CopyBackward               ; Copy backward if overlapped
 @@:
     mov     rcx, r8
-- 
2.39.2