Marc,

On 6/14/2011 7:01 PM, Marc-André Moreau wrote:
> Hi Steve,
>
> I noticed the addition of cpuid.h, which is not found on Mac OS X. Is 
> there a more portable alternative for detecting SSE support level? 
> Can't the cpuinfo instruction be used for this?

That's weird.  I was under the assumption that cpuid.h was provided by 
default by GCC.  Are you using a different compiler?

Do you have any additional information about the cpuinfo instruction you 
are talking about?  I Googled it and didn't find much promising.  Or... 
maybe you are talking about parsing /proc/cpuinfo.  If so, there are a 
lot of comments out there about that being a bad idea.

One possibility is to roll our own cpuid instruction based on 
information found here and put it in our rfx_sse.h file:
     http://softpixel.com/~cwright/programming/simd/cpuid.php

On the Windows side, we can probably just use __cpuid found in <intrin.h>:
     http://msdn.microsoft.com/en-us/library/hskdteyh.aspx
Do you know if Mac OS X has this file?  GCC didn't seem to find it on my 
Ubuntu machines.

Thanks,
  Steve

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