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

#------------------------------------------------------------------------------
#
# 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 _InternalMathLRotU64
_InternalMathLRotU64:
    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