15 Feb
2011
15 Feb
'11
1:05 p.m.
On 15/02/2011 13:35, Jeff Flinn wrote:
This caught my eye. A couple of years ago I looked at MMX/SIMD - tested an example off of the codeguru website which out of the box showed MMX/SIMD was faster. I unrolled the loop of the non-MMX/SIMD code using duff's device and saw no difference in performance with or without MMX/SIMD. I'm just wondering in your experience is there a real benefit of MMX/SIMD even discounting the alignment issue.
I don't think copying 3 words is really the area where SIMD shines the most. But it does shine (with linear speedups) in others.