[Angstrom-devel] [Review] mplayer tuning

[Koen Kooi]

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Stanislav Brabec schreef:
| Koen Kooi wrote:
|
|> +FULL_OPTIMIZATION = "-fexpensive-optimizations -fomit-frame-pointer -
|> frename-registers -O4 -ffast-math"
|
| Current gcc does not support -O4. Any -O > 3 is interpreted as -O3.

I just put in the tuning that Tim has tested :)

| -fexpensive-optimizations is on by default for -O2 -O3 and -Os.
|
| Note that -O3 may possibly generate larger code than -O2. It may have
| positive or negative impact.
|
| In case of positive impact:
| Experiment with -funroll-loops (and remove implied -frename-registers)
|
| In case of negative impact (comparing to -Os):
| Replace -O3 by -Os -funswitch-loops -fgcse-after-reload, which is
| something as -O3 version of -Os.

I'll leave that to the mplayer using crowd to test that.

Im the meantime, can we get this patch in as-is? We can always change it
to some of the things you mentioned after people have tested all
permutations.

regards,

Koen

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