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
52
53
54
55
56
57
|
#------------------------------------------------------------------------------
#
# Copyright (c) 2008 - 2010, 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
GCC_ASM_EXPORT(__clzsi2)
ASM_PFX(__clzsi2):
@ frame_needed = 1, uses_anonymous_args = 0
stmfd sp!, {r7, lr}
add r7, sp, #0
movs r3, r0, lsr #16
movne r3, #16
moveq r3, #0
movne r9, #0
moveq r9, #16
mov r3, r0, lsr r3
tst r3, #65280
movne r0, #8
moveq r0, #0
movne lr, #0
moveq lr, #8
mov r3, r3, lsr r0
tst r3, #240
movne r0, #4
moveq r0, #0
movne ip, #0
moveq ip, #4
mov r3, r3, lsr r0
tst r3, #12
movne r0, #2
moveq r0, #0
movne r1, #0
moveq r1, #2
mov r2, r3, lsr r0
add r3, lr, r9
add r0, r3, ip
add r1, r0, r1
mov r0, r2, lsr #1
eor r0, r0, #1
ands r0, r0, #1
mvnne r0, #0
rsb r3, r2, #2
and r0, r0, r3
add r0, r1, r0
ldmfd sp!, {r7, pc}
|
