mirror of https://git.sr.ht/~rabbits/uxn
48 lines
818 B
Tal
48 lines
818 B
Tal
( Fibonacci: Numbers made of the two numbers before it )
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|0100
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@on-reset
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#0019 #0001
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&l ( -- )
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( index ) DUP2 pdec #2018 DEO
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( recursive ) DUP2 fib pdec #2018 DEO
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( tail-recursive ) DUP2 #0000 #0001 ROT2 fibr pdec
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( lb ) #0a18 DEO
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POP2 POP2 INC2 GTH2k ?&l
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POP2 POP2
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( end ) #800f DEO
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BRK
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(
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@|recursive )
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@fib ( num* -- numfib* )
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#0001 GTH2k ?&>ok
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POP2 JMP2r &>ok
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SUB2k fib STH2
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INC2 SUB2 fib STH2r
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ADD2 JMP2r
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(
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@|tail-recursive )
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@fibr ( a* b* num* -- a* b* numfib* )
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#0001 NEQ2k ?&>no-1
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POP2 POP2 DUP2 JMP2r &>no-1
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SUB2 STH2
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SWP2 OVR2 ADD2 STH2r !fibr
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(
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@|stdlib )
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@pdec ( short* -- )
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#2710 LIT2r 00fb
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&w ( -- )
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DIV2k #000a DIV2k MUL2 SUB2 SWPr EQUk OVR STHkr EQU AND ?&>skip
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DUP LIT "0 ADD #18 DEO
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INCr &>skip
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POP2 #000a DIV2 SWPr INCr STHkr ?&w
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POP2r POP2 POP2 JMP2r
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