[FFmpeg-devel] [FFmpeg-cvslog] r12171 - trunk/doc/optimization.txt

İsmail Dönmez ismail
Thu Feb 21 21:01:16 CET 2008


On Thu, Feb 21, 2008 at 9:57 PM, Uoti Urpala <uoti.urpala at pp1.inet.fi> wrote:
> On Thu, 2008-02-21 at 20:11 +0100, Michael Niedermayer wrote:
>  > As you can see gcc injects 2 unneeded lea instructions in the innermost loop.
>  It'd need at least one other instruction instead though. Anyway I do not
>  see that behavior with Debian's gcc-4.3, gcc always uses 3 instructions
>  for the adds (same as the handwritten asm).

That supports my theory that gcc 4.3 is a big improvement optimization wise.


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