diff --git a/UefiCpuPkg/Universal/Acpi/S3Resume2Pei/X64/AsmFuncs.nasm b/UefiCpuPkg/Universal/Acpi/S3Resume2Pei/X64/AsmFuncs.nasm
new file mode 100644
index 0000000000..add73cacc0
--- /dev/null
+++ b/UefiCpuPkg/Universal/Acpi/S3Resume2Pei/X64/AsmFuncs.nasm
@@ -0,0 +1,41 @@
+;------------------------------------------------------------------------------ ;
+; Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
+; 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:
+;
+;   AsmFuncs.Asm
+;
+; Abstract:
+;
+;   Assembly function to set segment selectors.
+;
+; Notes:
+;
+;------------------------------------------------------------------------------
+
+DEFAULT REL
+SECTION .text
+
+;------------------------------------------------------------------------------
+; VOID
+; EFIAPI
+; AsmSetDataSelectors (
+;   IN UINT16   SelectorValue
+;   );
+;------------------------------------------------------------------------------
+global ASM_PFX(AsmSetDataSelectors)
+ASM_PFX(AsmSetDataSelectors):
+o16 mov     ds, cx
+o16 mov     es, cx
+o16 mov     fs, cx
+o16 mov     gs, cx
+o16 mov     ss, cx
+  ret
+