[FFmpeg-devel] [PATCH 4/5] lavu/intmath.h: Fix UB in ff_ctz_c() and ff_ctzll_c()

[Tomas Härdin]

tor 2024-05-30 klockan 10:54 +0300 skrev Rémi Denis-Courmont:
> Can't we just use the compiler built-ins here? AFAIK, they (GCC,
> LLVM) use the same algorithm if the CPU doesn't support native CTZ.
> And they will pick the right instruction if CPU does have CTZ.
> 
> I get it that maybe it wasn't working so well 20 years ago, but we've
> increased compiler version requirements since then.

I think we still support MSVC, but maybe we shouldn't? It's possible to
cross-compile for Windows either way.

/Tomas