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#!./parrot
# Copyright (C) 2005-2009, Parrot Foundation.
#
# ./parrot takfp.pir N (N = 10 for shootout)
# by Joshua Isom
# changed default value to N=7 (shootout default before being deprecated)
# anyway N=10 froze my laptop. Karl Forner
.sub main :main
.param pmc argv
.local int argc, n
argc = argv
n = 7
unless argc == 2 goto argsok
$S0 = argv[1]
n = $S0
argsok:
.local num f
$N0 = n
$N0 *= 3
$N1 = n
$N1 *= 2
$N2 = n
$N2 *= 1
f = Tak($N0, $N1, $N2)
$P0 = new 'FixedFloatArray'
$P0 = 1
$P0[0] = f
$S0 = sprintf "%.1f\n", $P0
print $S0
.end
.sub Tak
.param num x
.param num y
.param num z
unless y >= x goto endif
.return(z)
endif:
.local num tmp
tmp = x - 1
$N0 = Tak(tmp, y, z)
tmp = y - 1
$N1 = Tak(tmp, z, x)
tmp = z - 1
$N2 = Tak(tmp, x, y)
.tailcall Tak($N0, $N1, $N2)
.end
# Local Variables:
# mode: pir
# fill-column: 100
# End:
# vim: expandtab shiftwidth=4 ft=pir:
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