1 files changed, 60 insertions, 0 deletions
diff --git a/EdkCompatibilityPkg/Foundation/Library/CompilerStub/x64/memsetRep8.asm b/EdkCompatibilityPkg/Foundation/Library/CompilerStub/x64/memsetRep8.asm
new file mode 100644
index 0000000000..16cb026df1
--- /dev/null
+++ b/EdkCompatibilityPkg/Foundation/Library/CompilerStub/x64/memsetRep8.asm
@@ -0,0 +1,60 @@
+;------------------------------------------------------------------------------
+;
+; 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:
+;
+;   memsetRep8.asm
+;
+; Abstract:
+;
+;   SetMem function
+;
+; Notes:
+;
+;------------------------------------------------------------------------------
+
+    .code
+
+;------------------------------------------------------------------------------
+; VOID
+; memset (
+;   OUT     VOID                      *Buffer,
+;   IN      UINT8                     Value,
+;   IN      UINTN                     Length
+;   );
+;------------------------------------------------------------------------------
+memset   PROC    USES    rdi rbx
+    cmp     r8, 0                      ; if Size == 0, do nothing
+    mov     r9,  rcx
+    je      @SetDone
+    mov     rax, rdx
+    mov     bl,  al
+    mov     bh,  bl
+    mov     ax,  bx
+    shl     rax, 10h
+    mov     ax,  bx
+    mov     ebx, eax
+    shl     rax, 20h
+    mov     eax, ebx
+    mov     rdi, rcx
+    mov     rcx, r8
+    shr     rcx, 3
+    rep     stosq
+    mov     rcx, rdx
+    and     rcx, 7
+    rep     stosb
+@SetDone:
+    mov     rax, r9
+    ret
+memset   ENDP
+
+    END
+