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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