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

#

# 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:

#

# RRotU64.S

#

# Abstract:

#

# 64-bit right rotation for Ia32

#

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

ASM_GLOBAL ASM_PFX(InternalMathRRotU64)

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

# UINT64

# EFIAPI

# InternalMathRRotU64 (

# IN UINT64 Operand,

# IN UINTN Count

# );

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

ASM_PFX(InternalMathRRotU64):

push %ebx

movb 16(%esp), %cl

movl 8(%esp), %eax

movl 12(%esp), %edx

shrdl %cl, %eax, %ebx

shrdl %cl, %edx, %eax

roll %cl, %ebx

shrdl %cl, %ebx, %edx

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

cmovnz %eax, %ecx # switch eax & edx if Count >= 32

cmovnz %edx, %eax

cmovnz %ecx, %edx

pop %ebx

ret