[FFmpeg-devel] [PATCH] SIMD-optimized exponent_min() for ac3enc

Loren Merritt lorenm
Mon Jan 17 03:19:55 CET 2011

On Sun, 16 Jan 2011, Justin Ruggles wrote:
> Reversing the outer loop seems unrelated to what you've mentioned.  I
> don't see how it helps.  Is it actually faster to have an extra add
> instead of an offset in the load and store?

The point was to make expq point to the base of the current inner loop. 
Any change in addressing of the outer loop is a side-effect, and isn't 
supposed to affect speed.

--Loren Merritt

More information about the ffmpeg-devel mailing list