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.