1 files changed, 43 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseMemoryLibOptPei/x64/SetMem64.asm b/MdePkg/Library/BaseMemoryLibOptPei/x64/SetMem64.asm
new file mode 100644
index 0000000000..97884a36fe
--- /dev/null
+++ b/MdePkg/Library/BaseMemoryLibOptPei/x64/SetMem64.asm
@@ -0,0 +1,43 @@
+;------------------------------------------------------------------------------
+;
+; Copyright (c) 2006, 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:
+;
+;   SetMem64.Asm
+;
+; Abstract:
+;
+;   SetMem64 function
+;
+; Notes:
+;
+;------------------------------------------------------------------------------
+
+    .code
+
+;------------------------------------------------------------------------------
+;  VOID *
+;  InternalMemSetMem64 (
+;    IN VOID   *Buffer,
+;    IN UINTN  Count,
+;    IN UINT64 Value
+;    )
+;------------------------------------------------------------------------------
+InternalMemSetMem64 PROC    USES    rdi
+    mov     rdi, rcx
+    mov     rax, r8
+    xchg    rcx, rdx
+    rep     stosq
+    mov     rax, rdx
+    ret
+InternalMemSetMem64 ENDP
+
+    END