On Saturday 26 January 2008 06:24, Joerg Wunsch wrote:
> Gre7g Luterman <[EMAIL PROTECTED]> wrote:
> > IIRC, it is actually the responsibility of the called
> > function (the callee) to clear r25 when returning an
> > unsigned byte. The caller can presume this to be
> > clear already.
>
> You're right, it's a typo and should really read "callee".
An example:
extern char Slave (void);
int Master (void)
{
return Slave() + 1;
}
Here the Master() extends char to int before addition.
This is match to common 'integral promotion'.
I have look all Avr-gcc releases since 3.3.6: anywhere
the Master() does it.
Note, in older Avr-gcc the Slave() does it also.
Regards,
Dmitry.
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