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
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
|
/* Set a block of memory to some byte value.
For SPARC v7.
Copyright (C) 1996-2018 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by David S. Miller <davem@caip.rutgers.edu> and
Jakub Jelinek <jj@ultra.linux.cz>.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <sysdep.h>
/* Store 64 bytes at (BASE + OFFSET) using value SOURCE. */
#define ZERO_BIG_BLOCK(base, offset, source) \
std source, [base + offset + 0x00]; \
std source, [base + offset + 0x08]; \
std source, [base + offset + 0x10]; \
std source, [base + offset + 0x18]; \
std source, [base + offset + 0x20]; \
std source, [base + offset + 0x28]; \
std source, [base + offset + 0x30]; \
std source, [base + offset + 0x38];
#define ZERO_LAST_BLOCKS(base, offset, source) \
std source, [base - offset - 0x38]; \
std source, [base - offset - 0x30]; \
std source, [base - offset - 0x28]; \
std source, [base - offset - 0x20]; \
std source, [base - offset - 0x18]; \
std source, [base - offset - 0x10]; \
std source, [base - offset - 0x08]; \
std source, [base - offset - 0x00];
.text
.align 4
ENTRY(__bzero)
b 1f
mov %g0, %g3
3: cmp %o2, 3
be 2f
stb %g3, [%o0]
cmp %o2, 2
be 2f
stb %g3, [%o0 + 0x01]
stb %g3, [%o0 + 0x02]
2: sub %o2, 4, %o2
add %o1, %o2, %o1
b 4f
sub %o0, %o2, %o0
END(__bzero)
ENTRY(memset)
and %o1, 0xff, %g3
sll %g3, 8, %g2
or %g3, %g2, %g3
sll %g3, 16, %g2
or %g3, %g2, %g3
orcc %o2, %g0, %o1
1: cmp %o1, 7
bleu 7f
mov %o0, %g1
andcc %o0, 3, %o2
bne 3b
4: andcc %o0, 4, %g0
be 2f
mov %g3, %g2
st %g3, [%o0]
sub %o1, 4, %o1
add %o0, 4, %o0
2: andcc %o1, 0xffffff80, %o3
be 9f
andcc %o1, 0x78, %o2
4: ZERO_BIG_BLOCK (%o0, 0x00, %g2)
subcc %o3, 128, %o3
ZERO_BIG_BLOCK (%o0, 0x40, %g2)
bne 4b
add %o0, 128, %o0
orcc %o2, %g0, %g0
9: be 6f
andcc %o1, 7, %o1
mov %o7, %g4
101: call 100f
srl %o2, 1, %o3
mov %g4, %o7
jmpl %o4 + (20f + 64 - 101b), %g0
add %o0, %o2, %o0
100: retl
sub %o7, %o3, %o4
20: ZERO_LAST_BLOCKS(%o0, 0x48, %g2)
ZERO_LAST_BLOCKS(%o0, 0x08, %g2)
6: be 8f
andcc %o1, 4, %g0
be 1f
andcc %o1, 2, %g0
st %g3, [%o0]
add %o0, 4, %o0
1: be 1f
andcc %o1, 1, %g0
sth %g3, [%o0]
add %o0, 2, %o0
1: bne,a 8f
stb %g3, [%o0]
8: retl
mov %g1, %o0
7: orcc %o1, 0, %g0
be 0f
subcc %o1, 1, %o1
stb %g3, [%o0]
be 0f
subcc %o1, 1, %o1
stb %g3, [%o0 + 1]
be 0f
subcc %o1, 1, %o1
stb %g3, [%o0 + 2]
be 0f
subcc %o1, 1, %o1
stb %g3, [%o0 + 3]
be 0f
subcc %o1, 1, %o1
stb %g3, [%o0 + 4]
be 0f
subcc %o1, 1, %o1
stb %g3, [%o0 + 5]
be 0f
subcc %o1, 1, %o1
stb %g3, [%o0 + 6]
0: retl
nop
END(memset)
libc_hidden_builtin_def (memset)
weak_alias (__bzero, bzero)
|
