1 files changed, 68 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseMemoryLibSse2/Ia32/ZeroMem.s b/MdePkg/Library/BaseMemoryLibSse2/Ia32/ZeroMem.s
new file mode 100644
index 0000000000..f927f9128f
--- /dev/null
+++ b/MdePkg/Library/BaseMemoryLibSse2/Ia32/ZeroMem.s
@@ -0,0 +1,68 @@
+#------------------------------------------------------------------------------
+#
+# 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
+#    )
+#------------------------------------------------------------------------------
+.global _InternalMemZeroMem
+_InternalMemZeroMem:
+    push    %edi
+    movl    8(%esp), %edi
+    movl    12(%esp), %edx
+    xorl    %ecx, %ecx
+    subl    %edi, %ecx
+    xorl    %eax, %eax
+    andl    $15, %ecx
+    jz      L0
+    cmpl    %edx, %ecx
+    cmova   %edx, %ecx
+    subl    %ecx, %edx
+    rep
+    stosb
+L0: 
+    movl    %edx, %ecx
+    andl    $15, %edx
+    shrl    $4, %ecx
+    jz      @ZeroBytes
+    pxor    %xmm0, %xmm0
+L1: 
+    movntdq %xmm0, (%edi)
+    addl    $16, %edi
+    loop    L1
+    mfence
+@ZeroBytes: 
+    movl    %edx, %ecx
+    rep
+    stosb
+    movl    8(%esp), %eax
+    pop     %edi
+    ret