[x265] [PATCH] asm code for ipfilterH_pp, 4 tap filter

[Praveen Tiwari]

suppose, during execution width comes less than 8 like 5, then we would
like to run our code section which handles the reaming width (_end_col:)
not the whole code (handle multiple of 8 and renaming width part, it will
computed twice in this case and  corrupting some (8 - widthleft) dst[] old
values which is being used with 'pblenvb' instruction.This is why we have
put a check. if width is always >= 8 you are right, we don't need to put
the check.

Regards,
praveen


On Fri, Sep 27, 2013 at 9:05 PM, Jason Garrett-Glaser <jason at x264.com>wrote:

> > +_loop_row:
> > +    xor         col,        col
> > +    cmp                width,      0
> > +    je         _end_col
>
> I don't understand this. Why do we have to do this check?
>
> Jason
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