Rick Kelly writes: 

> Thor Lancelot Simon said: 
> 
>>The truth is, if your compiler is good enough to always output SSE code
>>for all floating-point operations (including "scalar" ones) so you never
>>pay the huge penalty for switching back and forth to x87 mode, P4 beats
>>the pants off anything else that will execute x86 instructions.
> 
> But I don't think that gcc is currently up to level. 
> 
> -- 
> Rick Kelly  rmk@rmkhome.com  www.rmkhome.com

And you might still hit some of its bottlenecks (cost, long pipelines, 
RAMBUS latency, etc.). 


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 -Benjamin Franklin