[FFmpeg-devel] [PATCH] Faster CABAC H.264 residual decoding

[Måns Rullgård]

matthieu castet <castet.matthieu at free.fr> writes:

> Jason Garrett-Glaser wrote:
>> On the advice of #ffmpeg-devel I have made a version with uint8_t
>> arrays instead of int.
>> 
> Don't forget that some cpu (arm for example) don't have native 8 bits 
> operation. Everything is done in 32 bits, and 8 bits behavior is 
> emulated with extra operation.

ARM has byte load and store instructions.  All ALU operations are
32-bit, except for certain multiplies.  I doubt this is a problem
here.

The only recent CPU I know of that lacks byte load/store is the first
generation of the Alpha.

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