[FFmpeg-devel] [PATCH] intmath.h: add an ff_log2_nz

Michael Niedermayer michael at niedermayer.cc
Thu Dec 17 19:22:51 CET 2015

On Thu, Dec 17, 2015 at 05:29:58PM +0000, Rostislav Pehlivanov wrote:
> This commit adds a raw integer log2 function (which directly maps to a
> builtin). This was needed as the Daala entropy coding system requires a
> raw log2 and the existing ff_log2 OR'd the argument with 1.

__builtin_clz(0) is undefined as ganesh pointed out elsewhere

if i read the intend correctly though this function is added because
of different behavior for 0, but IIUC its not different in a good way

Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

I know you won't believe me, but the highest form of Human Excellence is
to question oneself and others. -- Socrates
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