On 2/11/2010 8:56, Omar A Rodriguez wrote:
Hi all,
This is not necessarily a Moblin question but it's somewhat related...I
promise. In trying to learn more about Atom and Moblin, I keep seeing
references to SSE3. Questions in regard to Atom: is it just that it
supports SSE3 or are there specifics to how this makes Atom better or
any SSE instructions that perform specifically well on Atom? In regard
to Moblin: Does Moblin makes heavy use of SSE instructions and that's
why there's a requirement?
Atom supports SSSE3 (one more S) which is a superset over SSE3 (which is a
subset over SSE2 etc).
For Atom, using SSE for floating point math is preferable over using legacy x87
floating point,
you'll get quite a bit better performance.
In Moblin, we thus tell gcc to use SSE for floating point as much as possible
(some ABIs don't allow it,
but beyond that..)
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