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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 | #include <linux/linkage.h> |
2 | |
3 | .register %g2,#scratch |
4 | |
5 | .text |
6 | .align 32 |
7 | |
8 | ENTRY(ffs) |
9 | brnz,pt %o0, 1f |
10 | mov 1, %o1 |
11 | retl |
12 | clr %o0 |
13 | nop |
14 | nop |
15 | ENTRY(__ffs) |
16 | sllx %o0, 32, %g1 /* 1 */ |
17 | srlx %o0, 32, %g2 |
18 | |
19 | clr %o1 /* 2 */ |
20 | movrz %g1, %g2, %o0 |
21 | |
22 | movrz %g1, 32, %o1 /* 3 */ |
23 | 1: clr %o2 |
24 | |
25 | sllx %o0, (64 - 16), %g1 /* 4 */ |
26 | srlx %o0, 16, %g2 |
27 | |
28 | movrz %g1, %g2, %o0 /* 5 */ |
29 | clr %o3 |
30 | |
31 | movrz %g1, 16, %o2 /* 6 */ |
32 | clr %o4 |
33 | |
34 | and %o0, 0xff, %g1 /* 7 */ |
35 | srlx %o0, 8, %g2 |
36 | |
37 | movrz %g1, %g2, %o0 /* 8 */ |
38 | clr %o5 |
39 | |
40 | movrz %g1, 8, %o3 /* 9 */ |
41 | add %o2, %o1, %o2 |
42 | |
43 | and %o0, 0xf, %g1 /* 10 */ |
44 | srlx %o0, 4, %g2 |
45 | |
46 | movrz %g1, %g2, %o0 /* 11 */ |
47 | add %o2, %o3, %o2 |
48 | |
49 | movrz %g1, 4, %o4 /* 12 */ |
50 | |
51 | and %o0, 0x3, %g1 /* 13 */ |
52 | srlx %o0, 2, %g2 |
53 | |
54 | movrz %g1, %g2, %o0 /* 14 */ |
55 | add %o2, %o4, %o2 |
56 | |
57 | movrz %g1, 2, %o5 /* 15 */ |
58 | |
59 | and %o0, 0x1, %g1 /* 16 */ |
60 | |
61 | add %o2, %o5, %o2 /* 17 */ |
62 | xor %g1, 0x1, %g1 |
63 | |
64 | retl /* 18 */ |
65 | add %o2, %g1, %o0 |
66 | ENDPROC(ffs) |
67 | ENDPROC(__ffs) |
68 | |
69 | .section .popc_6insn_patch, "ax" |
70 | .word ffs |
71 | brz,pn %o0, 98f |
72 | neg %o0, %g1 |
73 | xnor %o0, %g1, %o1 |
74 | popc %o1, %o0 |
75 | 98: retl |
76 | nop |
77 | .word __ffs |
78 | neg %o0, %g1 |
79 | xnor %o0, %g1, %o1 |
80 | popc %o1, %o0 |
81 | retl |
82 | sub %o0, 1, %o0 |
83 | nop |
84 | .previous |
85 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
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v3.9