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