factor/extra/benchmark/recursive/recursive.factor

38 lines
821 B
Factor
Executable File

USING: math kernel hints prettyprint io combinators ;
IN: benchmark.recursive
: fib ( m -- n )
dup 2 < [ drop 1 ] [ [ 1 - fib ] [ 2 - fib ] bi + ] if ;
inline recursive
: ack ( m n -- x )
{
{ [ over zero? ] [ nip 1+ ] }
{ [ dup zero? ] [ drop 1- 1 ack ] }
[ [ drop 1- ] [ 1- ack ] 2bi ack ]
} cond ; inline recursive
: tak ( x y z -- t )
2over <= [
2nip
] [
[ rot 1- -rot tak ]
[ -rot 1- -rot tak ]
[ 1- -rot tak ]
3tri
tak
] if ; inline recursive
: recursive ( n -- )
[ 3 swap ack . flush ]
[ 27.0 + fib . flush ]
[ 1- [ 3 * ] [ 2 * ] [ ] tri tak . flush ] tri
3 fib . flush
3.0 2.0 1.0 tak . flush ;
HINTS: recursive fixnum ;
: recursive-main ( -- ) 11 recursive ;
MAIN: recursive-main