audk/MdePkg/Library/BaseLib/Ia32/LRotU64.S

44 lines
1.1 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:
#
# LRotU64.asm
#
# Abstract:
#
# 64-bit left rotation for Ia32
#
#------------------------------------------------------------------------------
.global _LRotU64
push %ebx
movb 16(%esp),%cl
movl 12(%esp),%edx
movl 8(%esp),%eax
shldl %cl,%edx,%ebx
shldl %cl,%eax,%edx
rorl %cl,%ebx
shldl %cl,%ebx,%eax
testb $32,%cl
cmovnz %eax, %ecx
cmovnz %edx, %eax
cmovnz %ecx, %edx
pop %ebx
ret