MdePkg BaseMemoryLibRepStr: Convert X64/ZeroMem.asm to NASM

The BaseTools/Scripts/ConvertMasmToNasm.py script was used to convert
X64/ZeroMem.asm to X64/ZeroMem.nasm

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
diff --git a/MdePkg/Library/BaseMemoryLibRepStr/BaseMemoryLibRepStr.inf b/MdePkg/Library/BaseMemoryLibRepStr/BaseMemoryLibRepStr.inf
index 5311d5d..cdff436 100644
--- a/MdePkg/Library/BaseMemoryLibRepStr/BaseMemoryLibRepStr.inf
+++ b/MdePkg/Library/BaseMemoryLibRepStr/BaseMemoryLibRepStr.inf
@@ -102,6 +102,7 @@
   X64/ScanMem8.S

   X64/CompareMem.nasm

   X64/CompareMem.S

+  X64/ZeroMem.nasm

   X64/ZeroMem.S

   X64/SetMem64.S

   X64/SetMem32.S

@@ -118,6 +119,7 @@
   X64/ScanMem8.asm

   X64/CompareMem.nasm

   X64/CompareMem.asm

+  X64/ZeroMem.nasm

   X64/ZeroMem.asm

   X64/SetMem64.asm

   X64/SetMem32.asm

diff --git a/MdePkg/Library/BaseMemoryLibRepStr/X64/ZeroMem.nasm b/MdePkg/Library/BaseMemoryLibRepStr/X64/ZeroMem.nasm
new file mode 100644
index 0000000..6613de8
--- /dev/null
+++ b/MdePkg/Library/BaseMemoryLibRepStr/X64/ZeroMem.nasm
@@ -0,0 +1,49 @@
+;------------------------------------------------------------------------------

+;

+; 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:

+;

+;   ZeroMem.Asm

+;

+; Abstract:

+;

+;   ZeroMem function

+;

+; Notes:

+;

+;------------------------------------------------------------------------------

+

+    DEFAULT REL

+    SECTION .text

+

+;------------------------------------------------------------------------------

+;  VOID *

+;  InternalMemZeroMem (

+;    IN VOID   *Buffer,

+;    IN UINTN  Count

+;    );

+;------------------------------------------------------------------------------

+global ASM_PFX(InternalMemZeroMem)

+ASM_PFX(InternalMemZeroMem):

+    push    rdi

+    push    rcx

+    xor     rax, rax

+    mov     rdi, rcx

+    mov     rcx, rdx

+    shr     rcx, 3

+    and     rdx, 7

+    rep     stosq

+    mov     ecx, edx

+    rep     stosb

+    pop     rax

+    pop     rdi

+    ret

+