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
|
#!./parrot
# Copyright (C) 2006-2009, Parrot Foundation.
#
# Ack by Leopold Toetsch
# Fib and Tak by Joshua Isom
# use less registers (leo)
# time ./parrot -Oc recursive-2.pir 11
# real 2.32 s (AMD X2@2000)
# modified default value to n=3. Karl Forner
.sub main :main
.param pmc argv
.local int argc, n
argc = argv
n = 3
unless argc == 2 goto argsok
$S0 = argv[1]
n = $S0
argsok:
$P0 = getinterp
$P0.'recursion_limit'(100000)
.local pmc array
array = new 'FixedFloatArray'
array = 11
dec n
$I0 = n + 1
$I1 = ack(3, $I0)
array[0] = $I0
array[1] = $I1
$N0 = 28.0 + n
array[2] = $N0
$N0 = FibNum($N0)
array[3] = $N0
$I0 = n * 3
$I1 = n * 2
array[4] = $I0
array[5] = $I1
array[6] = n
$I0 = TakInt($I0, $I1, n)
array[7] = $I0
$I0 = FibInt(3)
array[8] = $I0
$N0 = TakNum(3.0, 2.0, 1.0)
array[9] = $N0
$S0 = sprintf <<"END", array
Ack(3,%d): %d
Fib(%.1f): %.1f
Tak(%d,%d,%d): %d
Fib(3): %d
Tak(3.0,2.0,1.0): %.1f
END
print $S0
.end
.sub ack
.param int x
.param int y
unless x goto a1
unless y goto a2
dec y
y = ack(x, y)
dec x
.tailcall ack(x, y)
a1:
inc y
.return (y)
a2:
dec x
.tailcall ack(x, 1)
.end
.sub FibInt
.param int n
unless n < 2 goto endif
.return(1)
endif:
.local int tmp
tmp = n - 2
$I0 = FibInt(tmp)
tmp = n - 1
$I1 = FibInt(tmp)
$I0 += $I1
.return($I0)
.end
.sub FibNum
.param num n
unless n < 2.0 goto endif
.return(1.0)
endif:
.local num tmp
tmp = n - 2.0
$N0 = FibNum(tmp)
dec n
n = FibNum(n)
$N0 += n
.return($N0)
.end
.sub TakNum
.param num x
.param num y
.param num z
unless y >= x goto endif
.return(z)
endif:
.local num tmp
tmp = x - 1
$N0 = TakNum(tmp, y, z)
tmp = y - 1
$N1 = TakNum(tmp, z, x)
dec z
z = TakNum(z, x, y)
.tailcall TakNum($N0, $N1, z)
.end
.sub TakInt
.param int x
.param int y
.param int z
unless y >= x goto endif
.return(z)
endif:
.local int tmp
tmp = x - 1
$I0 = TakInt(tmp, y, z)
tmp = y - 1
tmp = TakInt(tmp, z, x)
dec z
z = TakInt(z, x, y)
.tailcall TakInt($I0, tmp, z)
.end
# Local Variables:
# mode: pir
# fill-column: 100
# End:
# vim: expandtab shiftwidth=4 ft=pir:
|
