RE: [avr-gcc-list] Add builtins in avr target.

[Weddington, Eric]

> -----Original Message-----
> From: 
> address@hidden 
> [mailto:address@hidden
> org] On Behalf Of Anatoly Sokolov
> Sent: Thursday, April 17, 2008 3:44 PM
> To: Oleksandr Redchuk; address@hidden
> Subject: Re: [avr-gcc-list] Add builtins in avr target.
> 
> Hi.
> 
> 
> > 2008/4/17, Wouter van Gulik <address@hidden>:
> > 
> >>  For a 2 cycles delays an rjmp can be used. Saves an instruction!
> > 
> > And so on:
> > 
> > 3 cycles:
> >   rjmp .
> >   nop
> > 
> 
> I shall try to replace 'nop' with 'rjmp .' for two cycle 
> delay.  It is necessary to check that the linker relaxation 
> pass will not remove the  'rjmp .' instruction. Now I do not 
> wish to complicate a code and to optimize 3..6 cycles delays.
> 

AFAIK, linker relaxation will do JMP->RJMP transformations only. Going
the other way is not a size optimization.