[MPlayer-dev-eng] swscale question

Michael Niedermayer michaelni at gmx.at
Tue Oct 30 20:40:22 CET 2001


Hi

On Tuesday 30 October 2001 20:23, Michael Niedermayer wrote:
...
>
> i fully agree with useing gcc if it outputs sane code, although a simple
> ./mplayer -vo x11 -pp 0 -zoom -xy 2 ~/ff.mpg  -benchmark shows:
> gcc: 16.532 sec
> asm: 12.467 sec
> looking at the output of gcc, it seems there is at least one partial
> register stall (5 cycles loss on ppro,p2,p3)
> the c functions are not really optimized (this one does 2 multiplies
> allthough 1 would be enough, ...)
> gcc neither used add/adc, ...
...
gcc 3.02 doesnt output code with a partial register stall :)
but it still didnt get the adc trick :( and it still uses 2 multiplies :(
i cant benchmark it at the moment because mplayer didnt compile with gcc-3.02 
:(

Michael



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