On Thu, Oct 15, 2015 at 10:18 AM, Hendrik Leppkes <h.lepp...@gmail.com> wrote: > On Thu, Oct 15, 2015 at 4:04 PM, Derek Buitenhuis > <derek.buitenh...@gmail.com> wrote: >> On 10/15/2015 1:18 PM, Ganesh Ajjanagadde wrote: >>> It has been demonstrated that using libc provided floating point >>> functions is beneficial, in the context of fabs() vs FFABS. >>> >>> Unfortunately, MSVC 2012 (and earlier) lack the ISO C99 fmax, fmaxf, >>> fmin, fminf functions. This patch adds them, thus making their usage in >>> FFmpeg safe. >> >> We previously had at least fmin emulation in libm.h, but it >> caused problems on some systems and was removed. >> >> Carl and Michael should remember. > > See 4436a8f44dedc83767b3d9da9beb85d1fae2ca30
Thanks for the reference, patch dropped. -ffinite-math (and some other floating point optimizations) look interesting and could be useful in libavfilter. I will look at this a little more carefully. Of course, we should never enable associative optimizations - that would be bad from an accuracy standpoint. > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > http://ffmpeg.org/mailman/listinfo/ffmpeg-devel _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
