On Wed, Jan 13, 2016 at 11:27 PM, Claudio Freire <klaussfre...@gmail.com> wrote: > On Mon, Jan 11, 2016 at 7:23 PM, Ganesh Ajjanagadde > <gajjanaga...@gmail.com> wrote: >> This is quite an accurate approximation; testing shows ~ 2ulp error in >> the floating point result. Tested with FATE. >> >> Alternatively, if one wants "full accuracy", one can use powf, or sqrt >> instead of sqrtf. With powf, one gets 1 ulp error (theoretically should be >> 0, as >> 0.75 is exactly representable) on GNU libm, with sqrt, 0 ulp error. >> >> Signed-off-by: Ganesh Ajjanagadde <gajjanaga...@gmail.com> > > > Pushed. > > Took the liberty of abstracting out the pow implementation we > discussed on IRC into a utility function and push that. It's more > readable, and next time we'll know clearly that's the way to go.
Good idea, thanks. _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
