From 37968f40064a228ec9660e3f6ab7fda0dc9300bf Mon Sep 17 00:00:00 2001
From: Jordan Justen <jordan.l.justen@intel.com>
Date: Mon, 30 May 2016 18:52:12 -0700
Subject: [PATCH] MdePkg BaseMemoryLibSse2: Convert Ia32/ZeroMem.asm to NASM

The BaseTools/Scripts/ConvertMasmToNasm.py script was used to convert
Ia32/ZeroMem.asm to Ia32/ZeroMem.nasm

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
---
 .../BaseMemoryLibSse2/BaseMemoryLibSse2.inf   |  2 +
 .../BaseMemoryLibSse2/Ia32/ZeroMem.nasm       | 65 +++++++++++++++++++
 2 files changed, 67 insertions(+)
 create mode 100644 MdePkg/Library/BaseMemoryLibSse2/Ia32/ZeroMem.nasm

diff --git a/MdePkg/Library/BaseMemoryLibSse2/BaseMemoryLibSse2.inf b/MdePkg/Library/BaseMemoryLibSse2/BaseMemoryLibSse2.inf
index d5e256e2ff..55faea0d75 100644
--- a/MdePkg/Library/BaseMemoryLibSse2/BaseMemoryLibSse2.inf
+++ b/MdePkg/Library/BaseMemoryLibSse2/BaseMemoryLibSse2.inf
@@ -55,6 +55,7 @@
   Ia32/ScanMem8.S
   Ia32/CompareMem.nasm
   Ia32/CompareMem.S
+  Ia32/ZeroMem.nasm
   Ia32/ZeroMem.S
   Ia32/SetMem64.S
   Ia32/SetMem32.S
@@ -71,6 +72,7 @@
   Ia32/ScanMem8.asm
   Ia32/CompareMem.nasm
   Ia32/CompareMem.asm
+  Ia32/ZeroMem.nasm
   Ia32/ZeroMem.asm
   Ia32/SetMem64.asm
   Ia32/SetMem32.asm
diff --git a/MdePkg/Library/BaseMemoryLibSse2/Ia32/ZeroMem.nasm b/MdePkg/Library/BaseMemoryLibSse2/Ia32/ZeroMem.nasm
new file mode 100644
index 0000000000..d1c6d3a052
--- /dev/null
+++ b/MdePkg/Library/BaseMemoryLibSse2/Ia32/ZeroMem.nasm
@@ -0,0 +1,65 @@
+;------------------------------------------------------------------------------
+;
+; 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.nasm
+;
+; Abstract:
+;
+;   ZeroMem function
+;
+; Notes:
+;
+;------------------------------------------------------------------------------
+
+    SECTION .text
+
+;------------------------------------------------------------------------------
+;  VOID *
+;  EFIAPI
+;  InternalMemZeroMem (
+;    IN VOID   *Buffer,
+;    IN UINTN  Count
+;    );
+;------------------------------------------------------------------------------
+global ASM_PFX(InternalMemZeroMem)
+ASM_PFX(InternalMemZeroMem):
+    push    edi
+    mov     edi, [esp + 8]
+    mov     edx, [esp + 12]
+    xor     ecx, ecx
+    sub     ecx, edi
+    xor     eax, eax
+    and     ecx, 15
+    jz      .0
+    cmp     ecx, edx
+    cmova   ecx, edx
+    sub     edx, ecx
+    rep     stosb
+.0:
+    mov     ecx, edx
+    and     edx, 15
+    shr     ecx, 4
+    jz      @ZeroBytes
+    pxor    xmm0, xmm0
+.1:
+    movntdq [edi], xmm0
+    add     edi, 16
+    loop    .1
+    mfence
+@ZeroBytes:
+    mov     ecx, edx
+    rep     stosb
+    mov     eax, [esp + 8]
+    pop     edi
+    ret
+
-- 
2.39.2