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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 | /* GENmemcpy.S: Generic sparc64 memcpy. |
2 | * |
3 | * Copyright (C) 2007 David S. Miller (davem@davemloft.net) |
4 | */ |
5 | |
6 | #ifdef __KERNEL__ |
7 | #define GLOBAL_SPARE %g7 |
8 | #else |
9 | #define GLOBAL_SPARE %g5 |
10 | #endif |
11 | |
12 | #ifndef EX_LD |
13 | #define EX_LD(x) x |
14 | #endif |
15 | |
16 | #ifndef EX_ST |
17 | #define EX_ST(x) x |
18 | #endif |
19 | |
20 | #ifndef EX_RETVAL |
21 | #define EX_RETVAL(x) x |
22 | #endif |
23 | |
24 | #ifndef LOAD |
25 | #define LOAD(type,addr,dest) type [addr], dest |
26 | #endif |
27 | |
28 | #ifndef STORE |
29 | #define STORE(type,src,addr) type src, [addr] |
30 | #endif |
31 | |
32 | #ifndef FUNC_NAME |
33 | #define FUNC_NAME GENmemcpy |
34 | #endif |
35 | |
36 | #ifndef PREAMBLE |
37 | #define PREAMBLE |
38 | #endif |
39 | |
40 | #ifndef XCC |
41 | #define XCC xcc |
42 | #endif |
43 | |
44 | .register %g2,#scratch |
45 | .register %g3,#scratch |
46 | |
47 | .text |
48 | .align 64 |
49 | |
50 | .globl FUNC_NAME |
51 | .type FUNC_NAME,#function |
52 | FUNC_NAME: /* %o0=dst, %o1=src, %o2=len */ |
53 | srlx %o2, 31, %g2 |
54 | cmp %g2, 0 |
55 | tne %XCC, 5 |
56 | PREAMBLE |
57 | mov %o0, GLOBAL_SPARE |
58 | |
59 | cmp %o2, 0 |
60 | be,pn %XCC, 85f |
61 | or %o0, %o1, %o3 |
62 | cmp %o2, 16 |
63 | blu,a,pn %XCC, 80f |
64 | or %o3, %o2, %o3 |
65 | |
66 | xor %o0, %o1, %o4 |
67 | andcc %o4, 0x7, %g0 |
68 | bne,a,pn %XCC, 90f |
69 | sub %o0, %o1, %o3 |
70 | |
71 | and %o0, 0x7, %o4 |
72 | sub %o4, 0x8, %o4 |
73 | sub %g0, %o4, %o4 |
74 | sub %o2, %o4, %o2 |
75 | 1: subcc %o4, 1, %o4 |
76 | EX_LD(LOAD(ldub, %o1, %g1)) |
77 | EX_ST(STORE(stb, %g1, %o0)) |
78 | add %o1, 1, %o1 |
79 | bne,pt %XCC, 1b |
80 | add %o0, 1, %o0 |
81 | |
82 | andn %o2, 0x7, %g1 |
83 | sub %o2, %g1, %o2 |
84 | 1: subcc %g1, 0x8, %g1 |
85 | EX_LD(LOAD(ldx, %o1, %g2)) |
86 | EX_ST(STORE(stx, %g2, %o0)) |
87 | add %o1, 0x8, %o1 |
88 | bne,pt %XCC, 1b |
89 | add %o0, 0x8, %o0 |
90 | |
91 | brz,pt %o2, 85f |
92 | sub %o0, %o1, %o3 |
93 | ba,a,pt %XCC, 90f |
94 | |
95 | .align 64 |
96 | 80: /* 0 < len <= 16 */ |
97 | andcc %o3, 0x3, %g0 |
98 | bne,pn %XCC, 90f |
99 | sub %o0, %o1, %o3 |
100 | |
101 | 1: |
102 | subcc %o2, 4, %o2 |
103 | EX_LD(LOAD(lduw, %o1, %g1)) |
104 | EX_ST(STORE(stw, %g1, %o1 + %o3)) |
105 | bgu,pt %XCC, 1b |
106 | add %o1, 4, %o1 |
107 | |
108 | 85: retl |
109 | mov EX_RETVAL(GLOBAL_SPARE), %o0 |
110 | |
111 | .align 32 |
112 | 90: |
113 | subcc %o2, 1, %o2 |
114 | EX_LD(LOAD(ldub, %o1, %g1)) |
115 | EX_ST(STORE(stb, %g1, %o1 + %o3)) |
116 | bgu,pt %XCC, 90b |
117 | add %o1, 1, %o1 |
118 | retl |
119 | mov EX_RETVAL(GLOBAL_SPARE), %o0 |
120 | |
121 | .size FUNC_NAME, .-FUNC_NAME |
122 |
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