1 files changed, 49 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseMemoryLibRepStr/Ia32/ZeroMem.S b/MdePkg/Library/BaseMemoryLibRepStr/Ia32/ZeroMem.S
new file mode 100644
index 000000000000..33b31ad38587
--- /dev/null
+++ b/MdePkg/Library/BaseMemoryLibRepStr/Ia32/ZeroMem.S
@@ -0,0 +1,49 @@
+#------------------------------------------------------------------------------
+#
+# Copyright (c) 2006 - 2008, 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:
+#
+#------------------------------------------------------------------------------
+
+ASM_GLOBAL ASM_PFX(InternalMemZeroMem)
+
+#------------------------------------------------------------------------------
+#  VOID *
+#  InternalMemZeroMem (
+#    IN VOID   *Buffer,
+#    IN UINTN  Count
+#    );
+#------------------------------------------------------------------------------
+ASM_PFX(InternalMemZeroMem):
+    push    %edi
+    xorl    %eax,%eax
+    movl    8(%esp),%edi
+    movl    12(%esp),%ecx
+    movl    %ecx,%edx
+    shrl    $2,%ecx
+    andl    $3,%edx
+    pushl   %edi
+    rep
+    stosl
+    movl    %edx,%ecx
+    rep
+    stosb
+    popl    %eax
+    pop     %edi
+    ret