1 files changed, 40 insertions, 0 deletions
diff --git a/roms/edk2/MdePkg/Library/BaseMemoryLibRepStr/X64/SetMem.nasm b/roms/edk2/MdePkg/Library/BaseMemoryLibRepStr/X64/SetMem.nasm
new file mode 100644
index 000000000..d5eaf7a91
--- /dev/null
+++ b/roms/edk2/MdePkg/Library/BaseMemoryLibRepStr/X64/SetMem.nasm
@@ -0,0 +1,40 @@
+;------------------------------------------------------------------------------
+;
+; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
+; SPDX-License-Identifier: BSD-2-Clause-Patent
+;
+; Module Name:
+;
+;   SetMem.Asm
+;
+; Abstract:
+;
+;   SetMem function
+;
+; Notes:
+;
+;------------------------------------------------------------------------------
+
+    DEFAULT REL
+    SECTION .text
+
+;------------------------------------------------------------------------------
+;  VOID *
+;  EFIAPI
+;  InternalMemSetMem (
+;    IN VOID   *Buffer,
+;    IN UINTN  Count,
+;    IN UINT8  Value
+;    )
+;------------------------------------------------------------------------------
+global ASM_PFX(InternalMemSetMem)
+ASM_PFX(InternalMemSetMem):
+    push    rdi
+    mov     rax, r8    ; rax = Value
+    mov     rdi, rcx   ; rdi = Buffer
+    xchg    rcx, rdx   ; rcx = Count, rdx = Buffer
+    rep     stosb
+    mov     rax, rdx   ; rax = Buffer
+    pop     rdi
+    ret
+