audk/MdePkg/Library/BaseLib/Ia32/RShiftU64.s

40 lines
1.0 KiB
ArmAsm

#------------------------------------------------------------------------------
#
# 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
#
#------------------------------------------------------------------------------
.global _RShiftU64
_RShiftU64:
movb 12(%esp),%cl
xorl %edx,%edx
movl 8(%esp),%eax
testb $32,%cl
cmovz %eax, %edx
cmovz 4(%esp), %eax
shrdl %cl,%edx,%eax
shrl %cl,%edx
ret