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#------------------------------------------------------------------------------
#
# Copyright (c) 2006 - 2008, 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:
#
# RRotU64.S
#
# Abstract:
#
# 64-bit right rotation for Ia32
#
#------------------------------------------------------------------------------
.globl 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
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