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Source at commit 0de2b2b3be81048189a32f7a3d3ba0ba9ec817b6 created 11 years 11 months ago. By Maarten ter Huurne, MIPS: JZ4740: Fixed value for round robin constant. | |
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1 | /* bitops.S: Sparc64 atomic bit operations. |
2 | * |
3 | * Copyright (C) 2000, 2007 David S. Miller (davem@davemloft.net) |
4 | */ |
5 | |
6 | #include <asm/asi.h> |
7 | #include <asm/backoff.h> |
8 | |
9 | .text |
10 | |
11 | .globl test_and_set_bit |
12 | .type test_and_set_bit,#function |
13 | test_and_set_bit: /* %o0=nr, %o1=addr */ |
14 | BACKOFF_SETUP(%o3) |
15 | srlx %o0, 6, %g1 |
16 | mov 1, %o2 |
17 | sllx %g1, 3, %g3 |
18 | and %o0, 63, %g2 |
19 | sllx %o2, %g2, %o2 |
20 | add %o1, %g3, %o1 |
21 | 1: ldx [%o1], %g7 |
22 | or %g7, %o2, %g1 |
23 | casx [%o1], %g7, %g1 |
24 | cmp %g7, %g1 |
25 | bne,pn %xcc, BACKOFF_LABEL(2f, 1b) |
26 | and %g7, %o2, %g2 |
27 | clr %o0 |
28 | movrne %g2, 1, %o0 |
29 | retl |
30 | nop |
31 | 2: BACKOFF_SPIN(%o3, %o4, 1b) |
32 | .size test_and_set_bit, .-test_and_set_bit |
33 | |
34 | .globl test_and_clear_bit |
35 | .type test_and_clear_bit,#function |
36 | test_and_clear_bit: /* %o0=nr, %o1=addr */ |
37 | BACKOFF_SETUP(%o3) |
38 | srlx %o0, 6, %g1 |
39 | mov 1, %o2 |
40 | sllx %g1, 3, %g3 |
41 | and %o0, 63, %g2 |
42 | sllx %o2, %g2, %o2 |
43 | add %o1, %g3, %o1 |
44 | 1: ldx [%o1], %g7 |
45 | andn %g7, %o2, %g1 |
46 | casx [%o1], %g7, %g1 |
47 | cmp %g7, %g1 |
48 | bne,pn %xcc, BACKOFF_LABEL(2f, 1b) |
49 | and %g7, %o2, %g2 |
50 | clr %o0 |
51 | movrne %g2, 1, %o0 |
52 | retl |
53 | nop |
54 | 2: BACKOFF_SPIN(%o3, %o4, 1b) |
55 | .size test_and_clear_bit, .-test_and_clear_bit |
56 | |
57 | .globl test_and_change_bit |
58 | .type test_and_change_bit,#function |
59 | test_and_change_bit: /* %o0=nr, %o1=addr */ |
60 | BACKOFF_SETUP(%o3) |
61 | srlx %o0, 6, %g1 |
62 | mov 1, %o2 |
63 | sllx %g1, 3, %g3 |
64 | and %o0, 63, %g2 |
65 | sllx %o2, %g2, %o2 |
66 | add %o1, %g3, %o1 |
67 | 1: ldx [%o1], %g7 |
68 | xor %g7, %o2, %g1 |
69 | casx [%o1], %g7, %g1 |
70 | cmp %g7, %g1 |
71 | bne,pn %xcc, BACKOFF_LABEL(2f, 1b) |
72 | and %g7, %o2, %g2 |
73 | clr %o0 |
74 | movrne %g2, 1, %o0 |
75 | retl |
76 | nop |
77 | 2: BACKOFF_SPIN(%o3, %o4, 1b) |
78 | .size test_and_change_bit, .-test_and_change_bit |
79 | |
80 | .globl set_bit |
81 | .type set_bit,#function |
82 | set_bit: /* %o0=nr, %o1=addr */ |
83 | BACKOFF_SETUP(%o3) |
84 | srlx %o0, 6, %g1 |
85 | mov 1, %o2 |
86 | sllx %g1, 3, %g3 |
87 | and %o0, 63, %g2 |
88 | sllx %o2, %g2, %o2 |
89 | add %o1, %g3, %o1 |
90 | 1: ldx [%o1], %g7 |
91 | or %g7, %o2, %g1 |
92 | casx [%o1], %g7, %g1 |
93 | cmp %g7, %g1 |
94 | bne,pn %xcc, BACKOFF_LABEL(2f, 1b) |
95 | nop |
96 | retl |
97 | nop |
98 | 2: BACKOFF_SPIN(%o3, %o4, 1b) |
99 | .size set_bit, .-set_bit |
100 | |
101 | .globl clear_bit |
102 | .type clear_bit,#function |
103 | clear_bit: /* %o0=nr, %o1=addr */ |
104 | BACKOFF_SETUP(%o3) |
105 | srlx %o0, 6, %g1 |
106 | mov 1, %o2 |
107 | sllx %g1, 3, %g3 |
108 | and %o0, 63, %g2 |
109 | sllx %o2, %g2, %o2 |
110 | add %o1, %g3, %o1 |
111 | 1: ldx [%o1], %g7 |
112 | andn %g7, %o2, %g1 |
113 | casx [%o1], %g7, %g1 |
114 | cmp %g7, %g1 |
115 | bne,pn %xcc, BACKOFF_LABEL(2f, 1b) |
116 | nop |
117 | retl |
118 | nop |
119 | 2: BACKOFF_SPIN(%o3, %o4, 1b) |
120 | .size clear_bit, .-clear_bit |
121 | |
122 | .globl change_bit |
123 | .type change_bit,#function |
124 | change_bit: /* %o0=nr, %o1=addr */ |
125 | BACKOFF_SETUP(%o3) |
126 | srlx %o0, 6, %g1 |
127 | mov 1, %o2 |
128 | sllx %g1, 3, %g3 |
129 | and %o0, 63, %g2 |
130 | sllx %o2, %g2, %o2 |
131 | add %o1, %g3, %o1 |
132 | 1: ldx [%o1], %g7 |
133 | xor %g7, %o2, %g1 |
134 | casx [%o1], %g7, %g1 |
135 | cmp %g7, %g1 |
136 | bne,pn %xcc, BACKOFF_LABEL(2f, 1b) |
137 | nop |
138 | retl |
139 | nop |
140 | 2: BACKOFF_SPIN(%o3, %o4, 1b) |
141 | .size change_bit, .-change_bit |
142 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
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v3.9