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06dc4de1 A |
1 | #------------------------------------------------------------------------------ |
2 | # | |
d6ebcab7 | 3 | # Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR> |
06dc4de1 | 4 | # |
d6ebcab7 | 5 | # This program and the accompanying materials |
06dc4de1 A |
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 | 19 | ASM_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 |