On Thu, Oct 15, 2015 at 08:18:02AM -0400, 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. >
Do we have any use of fmax/fmin? The functions don't exist to make
FFMAX-like faster, it actually is more complex:
These functions return the maximum of x and y.
If one argument is a NaN, the other argument is returned.
If both arguments are NaN, a NaN is returned.
Which means it's likely slower but will do more. Not that I mind, but in this
case, if we happen to use them, you will want to fix your local implementation
to match this behaviour.
[...]
--
Clément B.
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