On 01/14/2011 11:21 AM, Carsten Munk wrote:
2011/1/14<leonid.moiseic...@nokia.com>:
Enabling run-fast mode using -ffast-math is not-trivial hack. Also required
updating packages for compilation flags or global options.
Patching glibc is much cheaper to implement and safer.
In ideal case the speedup on cotext-a8 could be around 40% (depends on
vector/matrix size), even non-vector operations with floats improves for margin
more 10%.
BUT all float/doubles operations could be are affected: you may get different
outcome in comparison to IEEE mode.
Got any good benchmarks/tools we can run so we can verify this on
actual MeeGo hardfp?
http://maemo.org/community/maemo-developers/read/7abdcfc62c7411df94ad0b89e3fcd53dd53d/
and
http://maemo.org/community/maemo-developers/read/4af8d4302d2711dfbc6cdfe470c00a6b0a6b/
Not a real benchmark, but it might give an idea. It's about computing the length
of a path given its nodes in geocoordinates, on the N900.
HTH,
Alberto
--
http://blog.mardy.it <-- geek in un lingua international!
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