View Full Version : x264 - and its mac optimizations

peteag
28th May 2006, 09:14
Please post all known optimizations for the mac/ppc platform do you know. Because I don't see them when I call the help of x264.

My first:

-fastf (I think this is equivalent to TURBO)
-mcpu=G4 (or G5)

Please post. Thank you all.
foxyshadis
28th May 2006, 10:05
http://developer.apple.com/performance/g5optimization.html

Specific recommendations:
* Use the Apple modified gcc 3.3 from XCode (http://developer.apple.com/tools/xcode/index.html).
* -align-loops=32 and other 32-byte alignments.
* Use vecLib to create Altivec (aka Velocity) intrinsics, or just write Altivec code.
peteag
28th May 2006, 10:19
Where should I use these options? In the Terminal? Doesn't work - got an error "unknown option (e)"
I have Xcode 2.3 and compiled x264 so far it's working for me (./configure; make; make install)
What are the other 32-byte alignments???

UPDATE: Ah, I see. Open Xcode and use all the G5-optimized strings for the whole project to compile it. But where can I set them??? I don't find it!