#------------------------------------------------------------------------------

#

# 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:

#

# RShiftU64.S

#

# Abstract:

#

# 64-bit logical right shift function for IA-32

#

#------------------------------------------------------------------------------

.686:

.code:

ASM_GLOBAL ASM_PFX(InternalMathRShiftU64)

#------------------------------------------------------------------------------

# UINT64

# EFIAPI

# InternalMathRShiftU64 (

# IN UINT64 Operand,

# IN UINTN Count

# );

#------------------------------------------------------------------------------

ASM_PFX(InternalMathRShiftU64):

movb 12(%esp), %cl # cl <- Count

xorl %edx, %edx

movl 8(%esp), %eax

testb $32, %cl # Count >= 32?

cmovz %eax, %edx

cmovz 0x4(%esp), %eax

shrdl %cl, %edx, %eax

shr %cl, %edx

ret