Author Topic: Uae Built And Working - Any Optimisation Hints? (Read 6013 times)

chiark · « **on:** February 01, 2006, 05:56:03 am »

I've built UAE from source - a mercifully simple job - and am wondering if there's any particular compiler optimisations that are recommended for the Zaurus platform?

Performance is pretty good, but at the moment it couldn't really be used for games. It's not too far off though, particularly if frameskip is set to 3 and sound is turned off.

Advice on how to package up an ipk would be good, too?

I'm going to try the package with and without SDL graphics, and with and without SDL sound. The SDL graphics version seems fine, but SDL sound seems slow.

Anyone else interested?

pgas · « **Reply #1 on:** February 01, 2006, 06:11:58 am »

don't know for the optimization.

how to make an ipk:
http://mail.pdaxrom.org/contrib/docs/making_ipkg_howto.html

is this the same as
e-uae_0.8.28-RC2-1_armv5tel.ipk?

chiark · « **Reply #2 on:** February 01, 2006, 06:26:29 am »

That one is based on the 0.8.28 RC2 codebase; I've built using the formal release of 0.8.28. The delta's not huge, but

There are many many many options for compilation too (provided by configure) so I guess I should contact whoever created that version to see if they found any optimisations and also what worked better for the sound/gfx output.

A weird bug: the program segfaults if the on screen keyboard is present when the app starts, however starting after UAE has started causes no problems.

Thanks for the link to the guide - how embarassing that I couldnt' find that for myself

I'll carry on playing and see what gives me the best performance. I'm assuming that SDL in the beta1 feed is pretty much optimised and that there's no benefit of playing around with that?

I'll also see if I can find what compiler opts might work. Given that a configure/build takes around 20 minutes on the Z, this could be a long process

pgas · « **Reply #3 on:** February 01, 2006, 06:34:09 am »

Quote

so I guess I should contact whoever created that version to see if they found any optimisations and also what worked better for the sound/gfx output.

It's compiled by sash with the pdaxrom-builder, you should find the info you need by looking into it (in something like rules-ipk/e-uae.make)

anunakin · « **Reply #4 on:** February 01, 2006, 06:55:47 am »

pgas: What's the bests CFLAGS for SL-Cxx00?
How to activate iwmmx support?

chiark · « **Reply #5 on:** February 01, 2006, 07:00:32 am »

Thanks again pgas for your help with what must be a pretty n00b question

pgas · « **Reply #6 on:** February 01, 2006, 07:07:16 am »

Quote

pgas: What's the bests CFLAGS for SL-Cxx00?
How to activate iwmmx support?

sorry I don't know, I don't have a CXX00 ....

chiark · « **Reply #7 on:** February 02, 2006, 04:27:20 am »

Hmm, there's nothing in the ipk, so I'll drop sash a mail. I know he's busy, but it's worth a try

pgas · « **Reply #8 on:** February 02, 2006, 05:44:16 am »

Quote

Hmm, there's nothing in the ipk

yeah, the rules are in the builder:

http://mail.pdaxrom.org/1.1.0beta1/pdaXrom...7.12.05.tar.bz2

I had a look at rules-ipk/e-uae.make sash doesn't seem to use something special.

chiark · « **Reply #9 on:** February 02, 2006, 09:14:19 am »

"D'oh!"

I'll get to a basic level of knowledge on the system soon

danboid · « **Reply #10 on:** February 03, 2006, 04:16:29 am »

I'm presuming that both of these Zaurus UAE ports don't include the cyclone ARM ASM M68k emulator? If somebody gets that integrated into uae it should speed things up a lot.

I know there are lots of GP2X owners who want to run uae so I wouldn't be surprised to see some Gp2X devs teaming up with some Z devs, as we've seen with zpsx, to get this done. I hope so anyway!

chiark · « **Reply #11 on:** February 03, 2006, 11:58:02 am »

I'll look into the Cyclone side of things - thanks for the tip. Do you have any experience of how well cyclone compares with other (C/C++) implementations of a 68k?

I know e-uae supports JIT compilation on the x86 platform only, so there might be quite a bit more we can squeeze out of the arm side of things.

Civil · « **Reply #12 on:** February 03, 2006, 05:02:40 pm »

Quote

How to activate iwmmx support?

-march=iwmmxt -mcpu=iwmmxt -mtune=iwmmxt as I remember...

danboid · « **Reply #13 on:** February 04, 2006, 07:33:39 am »

An early version of UAE for the GP2X is out now but its quite slow at the mo apparently. It is a port of a UAE version for the Dreamcast called UAE4ALL

I was reading this thread

http://www.gp32x.com/board/index.php?showtopic=25056

and the bad news is that someone else who tried porting UAE to the GP2X says that cyclone doesn't seem to be compatible with it

I'm sure there is still hope for getting UAE running well on ARM.

chiark · « **Reply #14 on:** February 06, 2006, 03:00:38 pm »

Cheers for the updates everyone. That's sad about cyclone... I haven't yet looked into the cpu emulation of UAE, but it might be possible to nastily hack it in, surely?

It's a pure 68k emulator, not an 020/040 emulator, so it'd be definitely best for old games, etc...

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Author Topic: Uae Built And Working - Any Optimisation Hints? (Read 6013 times)