Re: AMD Geode processor optimisations for GCC 3.4.4

[Vladimir Makarov <vmakarov@xxxxxxxxxx>]

Frans Grotepass wrote:

> Hi all. 
>
> We use Linux in an embedded solution. We use the Elinos suite to create 
> trimmed down distributions. The suite has GCC-3.4.4 as compiler. Since we use 
> some image processing, I would like to check the advantages in using possible 
> compiler optimisations for the Geode. What are the optimal choice for the 
> Geode within GCC-3.4.4? 
>  
I'd try -mtune=k6 and -mtune=pentium2 or analogous -mcpu.  K6 is 
probably closer to geode except for aligning.  Geode is less sensitive 
to alignment so you could try to use -falign-{function,jump...}=0 and 
get smaller size which is pretty important for embedded solution.

As for fp performance, I don't know what to advice because pipeline of 
geode is different from k6 and i686 (pentium2).  Only benchmarking you 
application will tell you what to use.

>