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diff --git a/MdePkg/Library/BaseMemoryLibMmx/Ia32/SetMem16.nasm b/MdePkg/Library/BaseMemoryLibMmx/Ia32/SetMem16.nasm
new file mode 100644
index 0000000000..d7ea6c5a45
--- /dev/null
+++ b/MdePkg/Library/BaseMemoryLibMmx/Ia32/SetMem16.nasm
@@ -0,0 +1,61 @@
+;------------------------------------------------------------------------------
+;
+; Copyright (c) 2006, 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:
+;
+;   SetMem16.nasm
+;
+; Abstract:
+;
+;   SetMem16 function
+;
+; Notes:
+;
+;------------------------------------------------------------------------------
+
+    SECTION .text
+
+;------------------------------------------------------------------------------
+;  VOID *
+;  EFIAPI
+;  InternalMemSetMem16 (
+;    IN VOID   *Buffer,
+;    IN UINTN  Count,
+;    IN UINT16 Value
+;    )
+;------------------------------------------------------------------------------
+global ASM_PFX(InternalMemSetMem16)
+ASM_PFX(InternalMemSetMem16):
+    push    edi
+    mov     eax, [esp + 16]
+    shrd    edx, eax, 16
+    shld    eax, edx, 16
+    mov     edx, [esp + 12]
+    mov     edi, [esp + 8]
+    mov     ecx, edx
+    and     edx, 3
+    shr     ecx, 2
+    jz      @SetWords
+    movd    mm0, eax
+    movd    mm1, eax
+    psllq   mm0, 32
+    por     mm0, mm1
+.0:
+    movq    [edi], mm0
+    add     edi, 8
+    loop    .0
+@SetWords:
+    mov     ecx, edx
+    rep     stosw
+    mov     eax, [esp + 8]
+    pop     edi
+    ret
+