1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
#------------------------------------------------------------------------------
#
# Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
#
# SPDX-License-Identifier: BSD-2-Clause-Patent
#
#------------------------------------------------------------------------------
#include <AsmMacroIoLib.h>
.syntax unified
ASM_FUNC(__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
ldmfdeq 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}
|
