Re: [sdcc-devel] mcs51: AOP_DIR vs AOP_SFR?

[Maarten B. <sou...@ds...>]

Philipp Klaus Krause schreef op 2023-11-09 10:11:
> Currently, the mcs51 port uses the aop type AOP_DIR to anything
> directly addressed, no matter if it is a "normal" variable or a
> special function register.

I have not verified this. I'm assuming you are correct.

> But many functions handling stuff need to know if the thing they
> handle is an sfr. So, the mcs51 port uses operand in many places where
> other ports use asmop (to ensure that it is still possible to find out
> if that directly addressed thingis an sfr).
> 
> I wonder if it would be cleaner to handle this like the other ports:
> Have AOP_DIR only for things in normal memory, and use AOP_SFR for the
> special function registers.
> 
> Philipp

Then that might very well be.

If so then they probably start out as AOP_SFR and later get changed to 
AOP_DIR.

Maarten