Re: [avr-gcc-list] eicall & EIND

[Dusan Ferbas]

Hi Tristan,

thanks for reply.

Gcc can generate code for bootloader.
But I am not sure if eicall does not require EIND to be filled with ones.
Spec (AVR_instr_doc0856.pdf) is saying, that EIND is concatenated 
with Z (r30, r31),
so EIND=1 should be sufficient.

But when call 0x1f800 is compiled for ATmega128, all "unused" MS bits 
are filled with ones.

Can I look at your patch what is it about (support for eicall) ?

Dusan

At 11:27 2.7.2008, Tristan Gingold wrote:
> On Jul 2, 2008, at 11:14 AM, Dusan Ferbas wrote:
>
> > Hi Tristan,
> >
> > I noticed a notice about eicall support.
> > (2008-06-26  Tristan Gingold  <address@hidden> Add support for
> > avr6 instructions: eijmp, eicall)
> >
> > Can you point me to some link/resource/advice ?
>
> This is a patch for avrtest (not yet committed) - and avrtest doesn't
> support bootloader.
>
> I have not fully followed your issue.  But from what I understand gcc
> can't generate code
> for 256x bootloader.


Dusan Ferbas
www.etech.cz