Re: GCC Tests For ARM/Neon

[Joel Sherrill <joel dot sherrill at oarcorp dot com>]

Thanks.  We are close to branching an RTEMS release.
Sounds like this will be a good thing to switch to
immediately after that.

--joel
Paul Brook wrote:
> > We chose arm-elf as the starting point years.  If we need to
> > move to arm-eabi as the starting point that is OK.  We usually
> > just chose the CPU-coff or CPU-elf as a starting point
> > for CPU-rtems.
> >     
>
> I highly recommend switching to the EABI.
>
> If you want to support recent (Thumb-2) CPUs I'd expect that you pretty much
> have to use an EABI based target.
>
>   
> > What is the difference and how will it impact code?  I am
> > worried about our assembly code.
> >     
>
> The main visible change is that that you must preserve 8-byte stack alignment
> at public entry points.
>
>   
> > Is there a standard conditional to know the difference if
> > it matters?
> >     
>
> __ARM_EABI__
>
> Paul
>   


--
Joel Sherrill, Ph.D.             Director of Research & Development
joel.sherrill@OARcorp.com        On-Line Applications Research
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