[FFmpeg-devel] [PATCH 0/3] showcqt x86 optimization using intrinsic

[Hendrik Leppkes]

On Thu, Mar 10, 2016 at 11:08 AM, Muhammad Faiz <mfcc64 at gmail.com> wrote:
> On Thu, Mar 10, 2016 at 5:01 PM, Hendrik Leppkes <h.leppkes at gmail.com> wrote:
>> On Thu, Mar 10, 2016 at 10:53 AM, Muhammad Faiz <mfcc64 at gmail.com> wrote:
>>> I use intrinsic because writing asm using nasm or inline asm
>>> is difficult task for me.
>>>
>>
>> We have intentionally avoided intrinsics so far, because the result is
>> extremely compiler dependent, and I don't think we should just start
>
> What does the result means. Code correctness or performance?
>

Performance and code complexity, not to mention readability and
possibly portability.
For a little extra effort, you get a solution thats consistent in
performance, generally easier to read since its a style everyone here
is used to, and proven to work on every build configuration we have.

IMHO its totally worth learning how to do it, over just shoehorning
some intrinsics in "because its easier".

- Hendrik