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
|
module test
import StdEnv
import ABC.Machine
Start = toString end.io
where
(prog,descs) = assemble length
state = boot (prog,descs)
end = fetch_cycle state
rts :: Assembler
rts
= [ Descriptor "INT" "_rnf" 0 "integer"
, Descriptor "BOOL" "_rnf" 0 "boolean"
, Jmp "init_graph"
, Label "init_graph"
, Create
, Fill "Start" 0 "n_Start" 0
, Jsr "_driver"
, Print "\n"
, Halt
, Label "_driver"
, PushI 0
, Label "_print"
, JsrEval
, GetNodeArity 0
, EqI_b 0 0
, JmpFalse "_args"
, Label "_print_last"
, PrintSymbol 0
, Pop_a 1
, Pop_b 1
, Label "_brackets"
, EqI_b 0 0
, JmpTrue "_exit"
, Print ")"
, DecI
, Jmp "_brackets"
, Label "_exit"
, Rtn
, Label "_args"
, Print "("
, PrintSymbol 0
, GetDescArity 0
, ReplArgs_b
, Pop_b 1
, Label "_arg_loop"
, Print " "
, EqI_b 1 0
, JmpFalse "_next_arg"
, Pop_b 1
, IncI
, Jmp "_print"
, Label "_next_arg"
, Jsr "_driver"
, DecI
, Jmp "_arg_loop"
, Label "_rnf"
, Rtn
, Label "_cycle"
, Print "cycle in spine\n"
, Halt
, Label "_type_error"
, Print "type error\n"
, Halt
]
ints :: Assembler
ints
= [ Label "+I1"
, IncI
, Rtn
]
list :: Assembler
list
= [ Descriptor "Cons" "_rnf" 2 "Cons"
, Descriptor "Nil" "_rnf" 0 "Nil"
]
length :: Assembler // p. 87-88
length
= rts ++
list ++
ints ++
[ Descriptor "Length" "a_Length" 2 "Length"
, Label "n_Length"
, SetEntry "_cycle" 0
, PushArgs 0 2 2
, Label "a_Length"
, Push_a 1
, JsrEval
, Pop_a 1
, Label "Length1"
, EqDescArity "Cons" 2 1
, JmpFalse "Length2"
, PushArgs 1 2 2
, Push_a 1
, JsrEval
, Create
, Create
, FillI 1 0
, Push_a 5
, Jsr "+I1"
, Update_a 1 5
, Update_a 0 4
, Pop_a 4
, Jmp "Length1"
, Label "Length2"
, EqDescArity "Nil" 0 1
, JmpFalse "Length3"
, Fill_a 0 2
, Pop_a 2
, Rtn
, Label "Length3"
, Jmp "_type_error"
, Descriptor "Start" "n_Start" 0 "Start"
, Label "n_Start"
, Create
, Create
, Create
, Fill "Nil" 0 "_rnf" 0
, Create
, FillI 1 0
, Fill "Cons" 2 "_rnf" 2
, Fill "Length" 1 "n_Length" 1
//, Jmp "_driver"
, Dump ""
, Halt
]
cons_1_nil :: Assembler // p. 45, doesn't work (Nil/Cons no descriptors)
cons_1_nil
= [ Create
, Create
, Fill "Nil" 0 "_rnf" 0
, Create
, FillI 1 0
, Fill "Cons" 2 "_rnf" 2
]
|
