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#!./parrot
# Copyright (C) 2006-2009, Parrot Foundation.
#
# Ack by Leopold Toetsch
# Fib and Tak by Joshua Isom
# modified default value to n=3. Karl Forner
# ./parrot -Oc recursive.pir N
.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
if x goto a1
$I0 = y + 1
.return ($I0)
a1:
if y goto a2
$I0 = x - 1
$I1 = 1
.tailcall ack($I0, $I1)
a2:
$I2 = y - 1
$I3 = ack(x, $I2)
$I4 = x - 1
.tailcall ack($I4, $I3)
.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 goto endif
.return(1.0)
endif:
.local num tmp
tmp = n - 2
$N0 = FibNum(tmp)
tmp = n - 1
$N1 = FibNum(tmp)
$N0 += $N1
.return($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 - 1.0
$N0 = TakNum(tmp, y, z)
tmp = y - 1.0
$N1 = TakNum(tmp, z, x)
tmp = z - 1.0
$N2 = TakNum(tmp, x, y)
.tailcall TakNum($N0, $N1, $N2)
.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
$I0 = TakInt(tmp, y, z)
tmp = y - 1
tmp = TakInt(tmp, z, x)
dec z
z = TakInt(tmp, x, y)
.tailcall TakInt($I0, tmp, z)
.end
# Local Variables:
# mode: pir
# fill-column: 100
# End:
# vim: expandtab shiftwidth=4 ft=pir:
|
