pasm RES directive

agfa · 2009-04-10 02:14

If·more than 1 long is reserved for a variable (symbol), what syntax is used to address the 3 longs?

example:
m·· ·res· ·3

I tried m[noparse][[/noparse]0]...m[noparse][[/noparse]2] but no luck.

Phil Pilgrim (PhiPi) · 2009-04-10 02:26

res is only for assembly programs, since it reserves memory in the cog, not the hub. For Spin and other hub variables, you have to use long.

-Phil

agfa · 2009-04-10 03:05

Thanks Phil,

I am trying to understand it's use in assembly.· If I understand correctly, the following line reserves one long addressed as "m".

m·· res· 1

how would additional longs be addressed if more than one long were reserved?

Mike Green · 2009-04-10 03:27

You can use the addresses m+1, m+2, and m+3 to access the additional longs. If you want to use some kind of indexing, that's a completely different question. For that, you have to actually modify the instruction that you're using to access the additional longs. You'd have to show what you're trying to do. I believe there are some examples in some of the Prop Assembly for Beginners threads.

Phil Pilgrim (PhiPi) · 2009-04-10 03:32

This is usually done with self-modifing code:

        movs    loader,#m      'Initialize pointer
        ...
loader  mov     register,0-0     'Load register with contents of array m.
        add     loader ,#1       'Increment pointer into m.
        ...

-Phil

agfa · 2009-04-10 03:44

Mike,
thanks,·thats what i was looking for.

Phil,
thanks for the example.

agfa

pasm RES directive

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