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b062a9092a
As I wrote in my "Clarify signed-ness" commit, "0 <" is broken. Also, made this unit a bit more compact. The RC2014 stage1 can really use some breathing room...
43 lines
607 B
Forth
43 lines
607 B
Forth
( Words useful for complex comparison operations )
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: >= < NOT ;
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: <= > NOT ;
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: 0>= 0< NOT ;
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( n1 -- n1 true )
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: <>{ 1 ;
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( n1 f -- f )
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: <>} SWAP DROP ;
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: _|&
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( n1 n2 cell )
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>R >R DUP R> R> ( n1 n1 n2 cell )
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@ EXECUTE ( n1 f )
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;
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( n1 f n2 -- n1 f )
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: _|
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CREATE , DOES>
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( n1 f n2 cell )
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ROT IF 2DROP 1 EXIT THEN ( n1 true )
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_|&
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;
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: _&
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CREATE , DOES>
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( n1 f n2 cell )
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ROT NOT IF 2DROP 0 EXIT THEN ( n1 true )
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_|&
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;
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( All words below have this signature:
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n1 f n2 -- n1 f )
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' = _| |=
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' = _& &=
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' > _| |>
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' > _& &>
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' < _| |<
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' < _& &<
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