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Re: cortex / arm-hardfloat-linux-gnueabi (was Re: armelfp: new architecture name for an armel variant)

On Friday 16 July 2010 14:30:38 Paul Brook wrote:
> Based on what evidence?
> The G4 has an single cycle pipelined out-of-order FPU. The A8 has a
> non-pipelined FPU that takes between 5 and 20 (normal single precision is
>  10) cycles to give a result. A 9x slowdown sounds right on the ball.

Ok, I would be very interested in an explanation as to why it goes down from 
2:44 to 50s by a simple recompile. I also tried other example scenes, it 
wasn't the exception, rather the rule. If you believe I manipulated the 
benchmark in some way, feel free to try it yourself, you'll be surprised.


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