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Matt Sealey posted some interesting links in his blog
(http://likerabbits.blogspot.com/2005/06/apples-and-oranges.html) that I
thought I'd share with you. First there are some articles posted by Apple on
differences between AltiVec on the PowerPC and SSE on x86. I think it's
interesting that they post these articles because all they do is show how bad
SSE really is compared to AltiVec.
Finally there is a link to the MacSTL developer's site where he shows some
benchmarks on performance between AltiVec on a G5 vs SSE on a P4. He draws
some pretty interesting conclusions.
For those of you who doesn't want to visit Matt's blog I have put the actual
links here. If you decide to spread the word give credit to Matt and not me.
Differences in Instruction Architectures:
Intrinsics equivalents (note how most AltiVec instructions translate into two
or more SSE instructions, or in the worst case do not have an equivalent at
P.S. Don't forget to click "Yes" at the bottom of the article(s) and let Apple
know what you think ;) D.S.
Updated Jun 17, 2009
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