1 files changed, 59 insertions, 0 deletions
diff --git a/EdkCompatibilityPkg/Foundation/Library/EfiCommonLib/Ia32/EfiZeroMemRep4.c b/EdkCompatibilityPkg/Foundation/Library/EfiCommonLib/Ia32/EfiZeroMemRep4.c
new file mode 100644
index 0000000000..48936a829f
--- /dev/null
+++ b/EdkCompatibilityPkg/Foundation/Library/EfiCommonLib/Ia32/EfiZeroMemRep4.c
@@ -0,0 +1,59 @@
+/*++
+
+Copyright (c) 2007, Intel Corporation                                                         
+All rights reserved. This program and the accompanying materials                          
+are licensed and made available under the terms and conditions of the BSD License         
+which accompanies this distribution.  The full text of the license may be found at        
+http://opensource.org/licenses/bsd-license.php                                            
+                                                                                          
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.             
+
+Module Name:
+
+  EfiZeroMemRep4.c
+
+Abstract:
+
+  This is the code that uses rep stosd ZeroMem service
+
+--*/
+
+#include "Tiano.h"
+
+VOID
+EfiCommonLibZeroMem (
+  IN VOID   *Buffer,
+  IN UINTN  Count
+  )
+/*++
+
+Input:  VOID   *Buffer - Pointer to buffer to clear
+        UINTN  Count  - Number of bytes to clear
+
+Output: None.
+
+Saves:
+
+Modifies:
+
+Description:  This function uses rep stosd to zero memory.
+
+--*/
+{
+  __asm {
+    mov         ecx, Count
+    test        ecx, ecx
+    je          Exit
+    xor         eax, eax
+    mov         edi, Buffer
+    mov         edx, ecx
+    shr         ecx, 2
+    and         edx, 3
+    rep         stosd
+    mov         ecx, edx
+    rep         stosb
+Exit:
+  }
+}
+