pasm RES directive

agfa

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)

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

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

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)

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

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

Phil,
thanks for the example.

agfa