What's the different between Scorpion and pure A9 CPU?

[openglhk]

Could someone tell me which cpu performance is better?
Neon (128-bit wide) get faster in emulator or not?

Reference: http://en.wikipedia.org/wiki/Scorpion_(CPU)

Let's discuss..

[Carter07]

Cortex A9 is faster than scorpion principally because it's an out of order architecture (not partial), has more L2 cache and more bandwidth (in most soc implementations).

I have both cpus and I found that 1ghz cortex A9 performs like a 1.5ghz scorpion (measured with fps meter in 3 games).

In floating point calcolations scorpion may have a slightly advantage but I don't think ppsspp uses (yet?) NEON.
I don't know either if floating point operations are important for emulators in general.
Maybe Henrik can tell us more.

[Arcangel]

Scorpion is like a evolution of Cortex A8 Structure by Qualcomm, perform a little better than C-A8 But worse tha C-A9
Krait is the same but based on Cortex A9, I think it perform better tha C-A9
Krait 300 & Krait 400 based on C A15

Cortex A15 give the best performance. (Krait 300 & 400 not released jet)

This is my opinion I'm not too sure

[[Unknown]]

A lot of games use floating point and so, NEON could have a good benefit. However, right now PPSSPP doesn't really use it at all.

-[Unknown]

[Carter07]

(01-26-2013 07:12 PM)[Unknown] Wrote:  A lot of games use floating point and so, NEON could have a good benefit. However, right now PPSSPP doesn't really use it at all.

-[Unknown]

thanks for clarifying, keep up the good work!