1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
| /*
| * Copyright (C) 2004, 2007-2010, 2011-2014 Synopsys, Inc. All rights reserved.
| *
| * SPDX-License-Identifier: GPL-2.0+
| */
|
| #ifdef __LITTLE_ENDIAN__
| #define WORD2 r2
| #define SHIFT r3
| #else /* __BIG_ENDIAN__ */
| #define WORD2 r3
| #define SHIFT r2
| #endif /* _ENDIAN__ */
|
| .global memcmp
| .align 4
| memcmp:
| or %r12, %r0, %r1
| asl_s %r12, %r12, 30
| sub %r3, %r2, 1
| brls %r2, %r12, .Lbytewise
| ld %r4, [%r0, 0]
| ld %r5, [%r1, 0]
| lsr.f %lp_count, %r3, 3
| lpne .Loop_end
| ld_s WORD2, [%r0, 4]
| ld_s %r12, [%r1, 4]
| brne %r4, %r5, .Leven
| ld.a %r4, [%r0, 8]
| ld.a %r5, [%r1, 8]
| brne WORD2, %r12, .Lodd
| nop
| .Loop_end:
| asl_s SHIFT, SHIFT, 3
| bhs_s .Last_cmp
| brne %r4, %r5, .Leven
| ld %r4, [%r0, 4]
| ld %r5, [%r1, 4]
| #ifdef __LITTLE_ENDIAN__
| nop_s
| /* one more load latency cycle */
| .Last_cmp:
| xor %r0, %r4, %r5
| bset %r0, %r0, SHIFT
| sub_s %r1, %r0, 1
| bic_s %r1, %r1, %r0
| norm %r1, %r1
| b.d .Leven_cmp
| and %r1, %r1, 24
| .Leven:
| xor %r0, %r4, %r5
| sub_s %r1, %r0, 1
| bic_s %r1, %r1, %r0
| norm %r1, %r1
| /* slow track insn */
| and %r1, %r1, 24
| .Leven_cmp:
| asl %r2, %r4, %r1
| asl %r12, %r5, %r1
| lsr_s %r2, %r2, 1
| lsr_s %r12, %r12, 1
| j_s.d [%blink]
| sub %r0, %r2, %r12
| .balign 4
| .Lodd:
| xor %r0, WORD2, %r12
| sub_s %r1, %r0, 1
| bic_s %r1, %r1, %r0
| norm %r1, %r1
| /* slow track insn */
| and %r1, %r1, 24
| asl_s %r2, %r2, %r1
| asl_s %r12, %r12, %r1
| lsr_s %r2, %r2, 1
| lsr_s %r12, %r12, 1
| j_s.d [%blink]
| sub %r0, %r2, %r12
| #else /* __BIG_ENDIAN__ */
| .Last_cmp:
| neg_s SHIFT, SHIFT
| lsr %r4, %r4, SHIFT
| lsr %r5, %r5, SHIFT
| /* slow track insn */
| .Leven:
| sub.f %r0, %r4, %r5
| mov.ne %r0, 1
| j_s.d [%blink]
| bset.cs %r0, %r0, 31
| .Lodd:
| cmp_s WORD2, %r12
|
| mov_s %r0, 1
| j_s.d [%blink]
| bset.cs %r0, %r0, 31
| #endif /* _ENDIAN__ */
| .balign 4
| .Lbytewise:
| breq %r2, 0, .Lnil
| ldb %r4, [%r0, 0]
| ldb %r5, [%r1, 0]
| lsr.f %lp_count, %r3
| lpne .Lbyte_end
| ldb_s %r3, [%r0, 1]
| ldb %r12, [%r1, 1]
| brne %r4, %r5, .Lbyte_even
| ldb.a %r4, [%r0, 2]
| ldb.a %r5, [%r1, 2]
| brne %r3, %r12, .Lbyte_odd
| nop
| .Lbyte_end:
| bcc .Lbyte_even
| brne %r4, %r5, .Lbyte_even
| ldb_s %r3, [%r0, 1]
| ldb_s %r12, [%r1, 1]
| .Lbyte_odd:
| j_s.d [%blink]
| sub %r0, %r3, %r12
| .Lbyte_even:
| j_s.d [%blink]
| sub %r0, %r4, %r5
| .Lnil:
| j_s.d [%blink]
| mov %r0, 0
|
|
