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Instead of having wordref point to core word routines, I made them into word 4 word types. It liberates space into the stable ABI and should make porting to other arches easier. I'm also thinking of combining word type with the namelen field for precious bytes saving, but not now...
16 lines
576 B
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16 lines
576 B
Plaintext
Word types
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There are 4 word types in Collapse OS. Whenever you have a
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wordref, it's pointing to a byte with numbers 0 to 3. This
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number is the word type and the word's behavior depends on it.
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0: native. This words PFA contains native binary code and is
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jumped to directly.
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1: compiled. This word's PFA contains an atom list and its
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execution is described in "EXECUTION MODEL" above.
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2: cell. This word is usually followed by a 2-byte value in its
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PFA. Upon execution, the address of the PFA is pushed to PS.
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(cont.)
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