于 2012/6/26 18:39, Michael Zintakis 写道:
Personally, I think using "-O2 -march=atom -msssse3 -mfpmath=sse
-fomit-frame-pointer -pipe" is decent enough. Any other opinions? I
am using gcc 4.4.5.
-msssse3 -> -mssse3
Yeah, it was a typo, thanks!
As I know, -mfpmath=sse may slow some code speed in some
architechures, but I don't know if it also is on ATOM.
No idea! Hopefully, some of the more knowledgeable on this ML could
provide some insights.
If your code don't depend on floating point precision, you can use
-ffast-math.
If your code is stable enough, you can use gcc PGO optimazation.
And -mfpmath=sse will slow my most code greatly on my computer (gcc
32bit, Win7 64bit, Intel Core2), so I don't use it.
--
Best Regards,
xunxun
