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Labels without colon #15

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Ful9en opened this issue Feb 26, 2024 · 6 comments
Open

Labels without colon #15

Ful9en opened this issue Feb 26, 2024 · 6 comments

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@Ful9en
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Ful9en commented Feb 26, 2024

Labels with colons are not mandatory in 68000 assembler but it seems that they are in your asm-editor. Could this requirement be eliminated to avoid having to add the colon to all labels in order to adapt the code to your editor?

Thanks
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Which assembler are you taking as reference? I'm using easy68k

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Feb 27, 2024 •
edited
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Ok i used easy68k and this seems to be expected behaviour too

    bra test
    move.l #20, d0
test
    move.l #10, d0

this works.

i'm not sure what the grammar of m68k is at this point, i don't know how i could differentiate between instructions and labels. I should do a rewrite of the lexer/parser of the interpreter but i don't have much time lately, i'll keep this in consideration for the future though. If you have resources or information about this, share them here and i'll look at them

@Ful9en
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Ful9en commented Feb 27, 2024

From Easy68k Help:

Label Field
A label is used to identify a location in a program or a memory location by name. Instructions or directives that require a location may use a label to indicate the location. A label normally begins in the first column of the line. It must be terminated with a space, tab or a colon. If a colon is used it does not become part of the label. If a label does not start in the first column it must be terminated with a colon.

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Ah that assumes that instructions are always one tab indented and can't be on the start of the line, I'm not sure if I want that behavior

@Ful9en
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Ful9en commented Feb 28, 2024

Ok, but that's the official behavior of Motorola's original MASM. You can read it in section 2.4.1

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Feb 29, 2024 •
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Yes I saw, to implement that I'd have to redo the lexer/parser from scratch since it's pretty bad for now and doesn't support such things. I don't have much time to do that lately so I'll delay this for when I have the time, which might be a few months

I'll keep this issue open to track the feature

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@Ful9en