[FFmpeg-devel] [PATCH] lavu/libm: change macros to functions

[Ganesh Ajjanagadde]

On Sun, Dec 27, 2015 at 5:38 AM, Ronald S. Bultje <rsbultje at gmail.com> wrote:
> Hi,
>
> On Thu, Dec 24, 2015 at 1:32 PM, Ganesh Ajjanagadde <gajjanagadde at gmail.com>
> wrote:
>>
>> In the standard library, these are functions. We should match it; there
>> is no reason for these to be macros.
>>
>> While at it, add some trivial comments for readability and correct an
>> incorrect (at standard double precision) M_LN2 constant used in the exp2
>> fallback.
>
>
> For bisect purposes, the M_LN2 change should be a separate patch IMO. I
> don't have objections to that one.

The ln2 change went in already:
5630ed5be64fef3fd70cb93a7623d46afa0c83e6 with some very minor stuff
(comment additions),

>
> As for the rest, I'm not against it, but this stuff is extremely brittle so
> please test it extremely carefully on various configs.

Yes, I have dropped the rest on my end since:
1. I lack an array of configs (only GNU/Linux+clang/gcc, Mac OS X with
difficulty).
2. I am not knowledgable on this aspect.
3. It should be done slowly IMHO to minimize scope of regressions. For
a start, maybe focusing on the float variants (expf, etc) may be
useful.

>
> Ronald