Why 64 bit?

Why 64 bit?

Posted Sep 13, 2006 15:33 UTC (Wed) by khim (subscriber, #9252)
In reply to: Why 64 bit? by chill633
Parent article: What you should (and shouldn't) expect from 64-bit Linux (Linux.com)

Gosh. You've compared hand-optimized 32bit assembler code and generic 64bit code without SIMD commands. You found VERY surprising that optimized code which uses SIMD commands are faster then non-optimized code. Why ? Have you EVER seen situation where generic code is faster then hand-optimized code with SIMD instructions ?

Hint: if you are comparing DIFFERENT programs (and make no mistake: 32bit transcode and 64bit transoce are totally different beasts) all bets are off. Gentoo will not help there...

P.S. AFAIK 64bit SIMD implementation is in the works and there are something in CVS but it's not enabled in any builds right now...

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