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-rw-r--r--MdePkg/Library/BaseMemoryLibRepStr/BaseMemoryLibRepStr.inf2
-rw-r--r--MdePkg/Library/BaseMemoryLibRepStr/X64/SetMem64.nasm45
2 files changed, 47 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseMemoryLibRepStr/BaseMemoryLibRepStr.inf b/MdePkg/Library/BaseMemoryLibRepStr/BaseMemoryLibRepStr.inf
index cdff436c2f..e5712807f6 100644
--- a/MdePkg/Library/BaseMemoryLibRepStr/BaseMemoryLibRepStr.inf
+++ b/MdePkg/Library/BaseMemoryLibRepStr/BaseMemoryLibRepStr.inf
@@ -104,6 +104,7 @@
X64/CompareMem.S
X64/ZeroMem.nasm
X64/ZeroMem.S
+ X64/SetMem64.nasm
X64/SetMem64.S
X64/SetMem32.S
X64/SetMem16.S
@@ -121,6 +122,7 @@
X64/CompareMem.asm
X64/ZeroMem.nasm
X64/ZeroMem.asm
+ X64/SetMem64.nasm
X64/SetMem64.asm
X64/SetMem32.asm
X64/SetMem16.asm
diff --git a/MdePkg/Library/BaseMemoryLibRepStr/X64/SetMem64.nasm b/MdePkg/Library/BaseMemoryLibRepStr/X64/SetMem64.nasm
new file mode 100644
index 0000000000..350f97a8e1
--- /dev/null
+++ b/MdePkg/Library/BaseMemoryLibRepStr/X64/SetMem64.nasm
@@ -0,0 +1,45 @@
+;------------------------------------------------------------------------------
+;
+; 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:
+;
+; SetMem64.Asm
+;
+; Abstract:
+;
+; SetMem64 function
+;
+; Notes:
+;
+;------------------------------------------------------------------------------
+
+ DEFAULT REL
+ SECTION .text
+
+;------------------------------------------------------------------------------
+; VOID *
+; InternalMemSetMem64 (
+; IN VOID *Buffer,
+; IN UINTN Count,
+; IN UINT64 Value
+; )
+;------------------------------------------------------------------------------
+global ASM_PFX(InternalMemSetMem64)
+ASM_PFX(InternalMemSetMem64):
+ push rdi
+ mov rdi, rcx
+ mov rax, r8
+ xchg rcx, rdx
+ rep stosq
+ mov rax, rdx
+ pop rdi
+ ret
+