--- /dev/null
+#------------------------------------------------------------------------------
+#
+# 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:
+#
+# RShiftU64.asm
+#
+# Abstract:
+#
+# 64-bit logical right shift function for IA-32
+#
+#------------------------------------------------------------------------------
+
+ .686:
+ .code:
+
+.globl ASM_PFX(InternalMathRShiftU64)
+
+#------------------------------------------------------------------------------
+# UINT64
+# EFIAPI
+# InternalMathRShiftU64 (
+# IN UINT64 Operand,
+# IN UINTN Count
+# );
+#------------------------------------------------------------------------------
+ASM_PFX(InternalMathRShiftU64):
+ movb 12(%esp), %cl
+ xorl %edx, %edx
+ movl 8(%esp), %eax
+ testb $32, %cl
+ cmovz %eax, %edx
+ cmovz 0x4(%esp), %eax
+ shrdl %cl, %edx, %eax
+ shr %cl, %edx
+ ret