Re: [avr-gcc-list] compiler function prologue/epilogue incorrect?

[Michal Grégr]

Hi Craig,

can you describe what problem are you having? I had some stability problems 
recently when I used 16MHz crystal instead of 8MHz and I also suspected the 
function prolog/epilog. The program started to crash randomly after crystal 
change.

thanks,
mike

> ------------ Původní zpráva ------------
> Od:  <address@hidden>
> Předmět: Re: [avr-gcc-list] compiler function prologue/epilogue incorrect?
> Datum: 27.9.2006 07:39:58
> ----------------------------------------
> Hi
>
> > > [me]
> > > OK. The effect of CLI is immediate though so either there is some special
> > > magic for CLI or there might be some other magic associated with SEI and
> > > RETI that produce the extra instruction delay. Hopefully it's CLI that is
> > > special in some way and everyone else gets the 1 instruction delay!
> >
> >[paulo]
> > Actually the effect for CLI is the "same": the instruction after the CLI
> > is always executed ;)
> >
> > However, if there is no CLI, handling the interrupt will take at least
> > two clock cycles because of the pipeline stall.
>
> OK, thank you. Since no-one else has experienced problems, my troubles 
> probably
> lie elsewhere ... I'll spend some time sifting through the assembly code
> looking
> for other reasons for the behavioural issues I see when using different
> versions
> of gcc.
>
> bye,
>
> --Craig
>
>
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