Re: [avr-gcc-list] Assembly language help

[Parthasaradhi Nayani]

Hello Erik Christiansen,

Thanks for the reply. This is something new I have learnt today!!! I had, some time ago, come across LO (x) and HI (x) but now sieving through codes and googling around have not found the same. Can you throw some light on this as well. Thanks in advance.

Regards
Nayani 

Erik Christiansen <address@hidden> wrote:
>  On Sat, Jul 28, 2007 at 09:00:08PM -0700, Parthasaradhi Nayani wrote:
> >     ldi   r24, lo8(label1)
> >     ldi   r25, hi8(label1)
> >     asr   r25               ; convert byte addr
> >     ror   r24               ; to word addr
>
> Fine to begin with, but if you try:
>
>      ldi   r24, pm_lo8(label1)
>      ldi   r25, pm_hi8(label1)
>
> there is no need to perform the run-time address conversion. :-)
>
> If there is a lot of assembler in
>  your future, then a pair of macros can
> make life easier.
>      
> Erik
>
>
>
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