From 878ddf1fc3540a715f63594ed22b6929e881afb4 Mon Sep 17 00:00:00 2001
From: bbahnsen <bbahnsen@6f19259b-4bc3-4df7-8a09-765794883524>
Date: Fri, 21 Apr 2006 22:54:32 +0000
Subject: Initial import.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@3 6f19259b-4bc3-4df7-8a09-765794883524
---
 MdePkg/Library/BaseMemoryLibMmx/ia32/ZeroMem.asm | 57 ++++++++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 MdePkg/Library/BaseMemoryLibMmx/ia32/ZeroMem.asm

(limited to 'MdePkg/Library/BaseMemoryLibMmx/ia32/ZeroMem.asm')

diff --git a/MdePkg/Library/BaseMemoryLibMmx/ia32/ZeroMem.asm b/MdePkg/Library/BaseMemoryLibMmx/ia32/ZeroMem.asm
new file mode 100644
index 0000000000..31ef120525
--- /dev/null
+++ b/MdePkg/Library/BaseMemoryLibMmx/ia32/ZeroMem.asm
@@ -0,0 +1,57 @@
+;------------------------------------------------------------------------------
+;
+; Copyright (c) 2006, 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:
+;
+;   ZeroMem.asm
+;
+; Abstract:
+;
+;   ZeroMem function
+;
+; Notes:
+;
+;------------------------------------------------------------------------------
+
+    .686
+    .model  flat,C
+    .xmm
+    .code
+
+;------------------------------------------------------------------------------
+;  VOID *
+;  _mem_ZeroMem (
+;    IN VOID   *Buffer,
+;    IN UINTN  Count
+;    )
+;------------------------------------------------------------------------------
+InternalMemZeroMem  PROC    USES    edi
+    mov     edi, [esp + 8]
+    mov     ecx, [esp + 12]
+    mov     edx, ecx
+    shr     ecx, 3
+    jz      @ZeroBytes
+    pxor    mm0, mm0
+@@:
+    movntq  [edi], mm0
+    add     edi, 8
+    loop    @B
+    mfence
+@ZeroBytes:
+    and     edx, 7
+    xor     eax, eax
+    mov     ecx, edx
+    rep     stosb
+    mov     eax, [esp + 8]
+    ret
+InternalMemZeroMem  ENDP
+
+    END
-- 
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