Root/
Source at commit 0de2b2b3be81048189a32f7a3d3ba0ba9ec817b6 created 11 years 11 months ago. By Maarten ter Huurne, MIPS: JZ4740: Fixed value for round robin constant. | |
---|---|
1 | /* strlen_user.S: Sparc optimized strlen_user code |
2 | * |
3 | * Return length of string in userspace including terminating 0 |
4 | * or 0 for error |
5 | * |
6 | * Copyright (C) 1991,1996 Free Software Foundation |
7 | * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu) |
8 | * Copyright (C) 1996 Jakub Jelinek (jj@sunsite.mff.cuni.cz) |
9 | */ |
10 | |
11 | #define LO_MAGIC 0x01010101 |
12 | #define HI_MAGIC 0x80808080 |
13 | |
14 | 10: |
15 | ldub [%o0], %o5 |
16 | cmp %o5, 0 |
17 | be 1f |
18 | add %o0, 1, %o0 |
19 | andcc %o0, 3, %g0 |
20 | be 4f |
21 | or %o4, %lo(HI_MAGIC), %o3 |
22 | 11: |
23 | ldub [%o0], %o5 |
24 | cmp %o5, 0 |
25 | be 2f |
26 | add %o0, 1, %o0 |
27 | andcc %o0, 3, %g0 |
28 | be 5f |
29 | sethi %hi(LO_MAGIC), %o4 |
30 | 12: |
31 | ldub [%o0], %o5 |
32 | cmp %o5, 0 |
33 | be 3f |
34 | add %o0, 1, %o0 |
35 | b 13f |
36 | or %o4, %lo(LO_MAGIC), %o2 |
37 | 1: |
38 | retl |
39 | mov 1, %o0 |
40 | 2: |
41 | retl |
42 | mov 2, %o0 |
43 | 3: |
44 | retl |
45 | mov 3, %o0 |
46 | |
47 | .align 4 |
48 | .global __strlen_user, __strnlen_user |
49 | __strlen_user: |
50 | sethi %hi(32768), %o1 |
51 | __strnlen_user: |
52 | mov %o1, %g1 |
53 | mov %o0, %o1 |
54 | andcc %o0, 3, %g0 |
55 | bne 10b |
56 | sethi %hi(HI_MAGIC), %o4 |
57 | or %o4, %lo(HI_MAGIC), %o3 |
58 | 4: |
59 | sethi %hi(LO_MAGIC), %o4 |
60 | 5: |
61 | or %o4, %lo(LO_MAGIC), %o2 |
62 | 13: |
63 | ld [%o0], %o5 |
64 | 2: |
65 | sub %o5, %o2, %o4 |
66 | andcc %o4, %o3, %g0 |
67 | bne 82f |
68 | add %o0, 4, %o0 |
69 | sub %o0, %o1, %g2 |
70 | 81: cmp %g2, %g1 |
71 | blu 13b |
72 | mov %o0, %o4 |
73 | ba,a 1f |
74 | |
75 | /* Check every byte. */ |
76 | 82: srl %o5, 24, %g5 |
77 | andcc %g5, 0xff, %g0 |
78 | be 1f |
79 | add %o0, -3, %o4 |
80 | srl %o5, 16, %g5 |
81 | andcc %g5, 0xff, %g0 |
82 | be 1f |
83 | add %o4, 1, %o4 |
84 | srl %o5, 8, %g5 |
85 | andcc %g5, 0xff, %g0 |
86 | be 1f |
87 | add %o4, 1, %o4 |
88 | andcc %o5, 0xff, %g0 |
89 | bne 81b |
90 | sub %o0, %o1, %g2 |
91 | |
92 | add %o4, 1, %o4 |
93 | 1: |
94 | retl |
95 | sub %o4, %o1, %o0 |
96 | |
97 | .section .fixup,#alloc,#execinstr |
98 | .align 4 |
99 | 9: |
100 | retl |
101 | clr %o0 |
102 | |
103 | .section __ex_table,#alloc |
104 | .align 4 |
105 | |
106 | .word 10b, 9b |
107 | .word 11b, 9b |
108 | .word 12b, 9b |
109 | .word 13b, 9b |
110 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9