Re: [Qemu-devel] Re: dyngen-exec.h cleanup

[Laurent Desnogues <laurent.desnogues@gmail.com>]

On Sun, Mar 8, 2009 at 5:00 PM, Jan Kiszka <jan.kiszka@web.de> wrote:
> Laurent Desnogues wrote:
[...]
>> Yes, and I did the work for ARM.  However when considering the
>> removal of AREG0, and after looking at generated code, I came
>> to the perhaps premature conclusion that removing it would not
>> bring me any speedup (at least for a not so register starved
>> target as x86_64).
>
> I don't think we are looking for speedup here, just for cleanup. Status
> quo regarding performance after a conversion would be more than fine IMHO.

I was ambiguous, I meant I expect slowdowns...  But given how many
times I was wrong in the past when I thought some tricks would
speedup things, I should probably not trust my a priori.

>> Well dyngen-exec.h is long gone in my sources even though
>> AREG0 is still used.  I would have to backtrack my changes to
>> see how I arrived to that, but for sure the first thing to do is to
>> remove cpu_T from ARM target.
>
> Yes, please share your wisdom!

Sorry if I sounded arrogant, I just wanted to highlight the fact one
can achieve your aim.  As far as sharing goes, that's another
story.


Laurent