[haiku-development] Re: how to get CPU features like SSE, etc

On Sat, Nov 7, 2009 at 5:07 AM, David McPaul <dlmcpaul@xxxxxxxxx> wrote:
> 2009/11/7 Konstantinos Margaritis <markos@xxxxxxxx>:
>> On Nov 7, 2009, at 1:18 PM, Axel Dörfler wrote:
>>>
>>> Currently, the only solution is to use the get_cpuid() function from
>>> userland.
>>> You can have a look at src/bin/sysinfo.c on how to retrieve the info
>>> you are interested in.
>
> I also have the beginnngs of a CpuCapabilities class committed in the
> ffmpeg media add-on.
>
> It needs more work but it could eventually be promoted to a more
> common place for more people to use.  gfx_util.cpp has an example of
> it's use.

I think it would be nice if this was available somewhere as an API.

I previously had to copy chunks of code from sysinfo in order to
support CPU features in BOINC:

http://boinc.berkeley.edu/trac/browser/trunk/boinc/client/hostinfo_unix.cpp#L687

Quite a PITA, and I never quite finished the AMD portion (because I
didn't have an AMD box handy during the porting)

BTW, I believe I found some feature mismatches and missing features in
the sysinfo implementation (compared to the intel specs) - I never got
around to providing a patch for those :P

- Urias

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