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1#------------------------------------------------------------------------------
2#
d6ebcab7 3# Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>
06dc4de1 4#
d6ebcab7 5# This program and the accompanying materials
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6# are licensed and made available under the terms and conditions of the BSD License
7# which accompanies this distribution. The full text of the license may be found at
8# http://opensource.org/licenses/bsd-license.php
9#
10# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
11# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
12#
13#------------------------------------------------------------------------------
14
58b5d037 15\s\s.text
16\s\s.align 2
17\s\sGCC_ASM_EXPORT(__ctzsi2)
18\s\s
4e471bfd 19ASM_PFX(__ctzsi2):
58b5d037 20\s\suxth\s\sr3, r0
21\s\scmp\s\sr3, #0
22\s\smoveq\s\sip, #16
23\s\smovne\s\sip, #0
24\s\s@ lr needed for prologue
25\s\smov\s\sr0, r0, lsr ip
26\s\stst\s\sr0, #255
27\s\smovne\s\sr3, #0
28\s\smoveq\s\sr3, #8
29\s\smov\s\sr0, r0, lsr r3
30\s\stst\s\sr0, #15
31\s\smovne\s\sr1, #0
32\s\smoveq\s\sr1, #4
33\s\sadd\s\sr3, r3, ip
34\s\smov\s\sr0, r0, lsr r1
35\s\stst\s\sr0, #3
36\s\smovne\s\sr2, #0
37\s\smoveq\s\sr2, #2
38\s\sadd\s\sr3, r3, r1
39\s\smov\s\sr0, r0, lsr r2
40\s\sand\s\sr0, r0, #3
41\s\sadd\s\sr2, r3, r2
42\s\seor\s\sr3, r0, #1
43\s\smov\s\sr0, r0, lsr #1
44\s\sands\s\sr3, r3, #1
45\s\smvnne\s\sr3, #0
46\s\srsb\s\sr0, r0, #2
47\s\sand\s\sr0, r3, r0
48\s\sadd\s\sr0, r2, r0
49\s\sbx\s\slr