Re: [avr-gcc-list] possible 4.1.2 bug

[John Regehr]

Doh.  I figured that this sort of constraint would be implicit from the 
instructions used.  Thanks!

John Regehr



On Thu, 29 Mar 2007, Joerg Wunsch wrote:

> John Regehr <address@hidden> wrote:
> 
> > I'm not at all sure that the asm is correct (didn't write it) but it
> > seems that gcc shouldn't be picking an unusable register in any
> > case.
> 
> The constraint "r" says: "You are free to pick *any* register."  As
> your instruction requires an "upper register" (r16 through r31), you
> simply need to tell that: make the constraint of the second argument
> "d", and it will work.
> 
> -- 
> cheers, J"org               .-.-.   --... ...--   -.. .  DL8DTL
> 
> http://www.sax.de/~joerg/                        NIC: JW11-RIPE
> Never trust an operating system you don't have sources for. ;-)
> 
> 
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