audk/MdePkg/Library/BaseLib/Ia32/DivU64x32Remainder.S

47 lines
1.8 KiB
ArmAsm

#------------------------------------------------------------------------------
#
# 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:
#
# DivError.S
#
# Abstract:
#
# Set error flag for all division functions
#
#------------------------------------------------------------------------------
.globl ASM_PFX(InternalMathDivRemU64x32)
#------------------------------------------------------------------------------
# UINT64
# EFIAPI
# InternalMathDivRemU64x32 (
# IN UINT64 Dividend,
# IN UINT32 Divisor,
# OUT UINT32 *Remainder
# );
#------------------------------------------------------------------------------
ASM_PFX(InternalMathDivRemU64x32):
movl 12(%esp), %ecx # ecx <- divisor
movl 8(%esp), %eax # eax <- dividend[32..63]
xorl %edx, %edx
divl %ecx # eax <- quotient[32..63], edx <- remainder
push %eax
movl 8(%esp), %eax # eax <- dividend[0..31]
divl %ecx # eax <- quotient[0..31]
movl 20(%esp), %ecx # ecx <- Remainder
jecxz L1 # abandon remainder if Remainder == NULL
movl %edx, (%ecx)
L1:
pop %edx # edx <- quotient[32..63]
ret