1 files changed, 39 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseLib/ia32/LShiftU64.s b/MdePkg/Library/BaseLib/ia32/LShiftU64.s
new file mode 100644
index 0000000000..94cbc12265
--- /dev/null
+++ b/MdePkg/Library/BaseLib/ia32/LShiftU64.s
@@ -0,0 +1,39 @@
+#------------------------------------------------------------------------------
+#
+# 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:
+#
+#   LShiftU64.asm
+#
+# Abstract:
+#
+#   64-bit left shift function for IA-32
+#
+#------------------------------------------------------------------------------
+
+
+
+     
+
+.global _LShiftU64
+_LShiftU64: 
+    movb    12(%esp),%cl
+    xorl    %eax,%eax
+    movl    4(%esp),%edx
+    testb   $32,%cl
+    cmovz   %edx, %eax
+    cmovz   8(%esp), %edx
+    shldl   %cl,%eax,%edx
+    shll    %cl,%eax
+    ret
+
+
+