[FFmpeg-devel] [PATCH] FFV1 speed tweaks

[Måns Rullgård]

"Jason Garrett-Glaser" <darkshikari at gmail.com> writes:

> +        /* Negate context and diff if context is negative */
> +        sign = context >> 31;
> +        context = (sign ^ context) - sign;
> +        diff = (sign ^ diff) - sign;
>
> -        if(context < 0){
> -            context = -context;
> -            diff= -diff;
> -        }

This results in worse code on ARM, using 5 instructions instead of 3.

-- 
M?ns Rullg?rd
mans at mansr.com