mirror of https://github.com/acidanthera/audk.git
59 lines
1.3 KiB
ArmAsm
59 lines
1.3 KiB
ArmAsm
#------------------------------------------------------------------------------
|
|
#
|
|
# Copyright (c) 2008 - 2009, Apple Inc. 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.
|
|
#
|
|
#------------------------------------------------------------------------------
|
|
|
|
.text
|
|
.align 2
|
|
.globl ASM_PFX(__udivsi3)
|
|
INTERWORK_FUNC(__udivsi3)
|
|
|
|
ASM_PFX(__udivsi3):
|
|
cmp r1, #0
|
|
cmpne r0, #0
|
|
stmfd sp!, {r4, r5, r7, lr}
|
|
add r7, sp, #8
|
|
beq L2
|
|
clz r2, r1
|
|
clz r3, r0
|
|
rsb r3, r3, r2
|
|
cmp r3, #31
|
|
bhi L2
|
|
ldmeqfd sp!, {r4, r5, r7, pc}
|
|
add r5, r3, #1
|
|
rsb r3, r3, #31
|
|
mov lr, #0
|
|
mov r2, r0, asl r3
|
|
mov ip, r0, lsr r5
|
|
mov r4, lr
|
|
b L8
|
|
L9:
|
|
mov r0, r2, lsr #31
|
|
orr ip, r0, ip, asl #1
|
|
orr r2, r3, lr
|
|
rsb r3, ip, r1
|
|
sub r3, r3, #1
|
|
and r0, r1, r3, asr #31
|
|
mov lr, r3, lsr #31
|
|
rsb ip, r0, ip
|
|
add r4, r4, #1
|
|
L8:
|
|
cmp r4, r5
|
|
mov r3, r2, asl #1
|
|
bne L9
|
|
orr r0, r3, lr
|
|
ldmfd sp!, {r4, r5, r7, pc}
|
|
L2:
|
|
mov r0, #0
|
|
ldmfd sp!, {r4, r5, r7, pc}
|
|
|