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
|
/* $OpenBSD: str.S,v 1.3 2011/06/06 07:54:33 jasper Exp $ */
/* $NetBSD: str.S,v 1.1 2002/02/24 01:04:25 matt Exp $ */
/*
* Copyright (c) 1996 Ludd, University of Lule}, Sweden.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed at Ludd, University of
* Lule}, Sweden and its contributors.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Small versions of the most common functions not using any
* emulated instructions.
*/
#include "asm.h"
/*
* atoi() used in devopen.
*/
ENTRY(atoi, 0)
movl 4(ap),r1
clrl r0
2: movzbl (r1)+,r2
cmpb r2,$48
blss 1f
cmpb r2,$57
bgtr 1f
subl2 $48,r2
mull2 $10,r0
addl2 r2,r0
brb 2b
1: ret
/*
* index() small and easy.
* doesnt work if we search for null.
*/
ENTRY(index, 0)
movq 4(ap),r0
1: cmpb (r0), r1
beql 2f
tstb (r0)+
bneq 1b
clrl r0
2: ret
/*
* cmpc3 is emulated on MVII.
*/
ENTRY(bcmp, 0)
movl 4(ap), r2
movl 8(ap), r1
movl 12(ap), r0
2: cmpb (r2)+, (r1)+
bneq 1f
decl r0
bneq 2b
1: ret
/*
* Is movc3/movc5 emulated on any CPU? I dont think so; use them here.
*/
ENTRY(bzero,0)
movc5 $0,*4(ap),$0,8(ap),*4(ap)
ret
ENTRY(bcopy,0)
movc3 12(ap), *4(ap), *8(ap)
ret
ENTRY(strlen, 0)
movl 4(ap), r0
1: tstb (r0)+
bneq 1b
decl r0
subl2 4(ap), r0
ret
ENTRY(strcmp, 0)
movl $250, r3 # max string len to compare
5: movl 4(ap), r2
movl 8(ap), r1
movl $1, r0
2: cmpb (r2),(r1)+
bneq 1f # something differ
tstb (r2)+
beql 4f # continue, strings unequal
decl r3 # max string len encountered?
bneq 2b
4: clrl r0 # We are done, strings equal.
ret
1: bgtr 3f
mnegl r0, r0
3: ret
ENTRY(strncpy, 0)
movl 4(ap), r1
movl 8(ap), r2
movl 12(ap), r3
bleq 2f
1: movb (r2)+, (r1)+
beql 2f
decl r3
bneq 1b
2: ret
ENTRY(setjmp, 0)
movl 4(ap), r0
movl 8(fp), (r0)
movl 12(fp), 4(r0)
movl 16(fp), 8(r0)
addl3 fp,$28,12(r0)
clrl r0
ret
ENTRY(longjmp, 0)
movl 4(ap), r1
movl $1, r0
movl (r1), ap
movl 4(r1), fp
movl 12(r1), sp
jmp *8(r1)
|
