[MPlayer-dev-eng] Re: Should I write Voodoo Banshee VIDIX driver?

[Torinthiel]

On Mon, Mar 22, 2004 at 10:11:42AM +0100, Alban Bedel wrote:
> Hi Torinthiel,
> 
> on Mon, 22 Mar 2004 09:39:22 +0100 you wrote:
> 
> > On Sun, Mar 21, 2004 at 11:44:56PM -0800, Georgi Petrov wrote:
> > > Oh, yes - I check wheter something is 4 bytes aligned this way:
> > > 
> > > if ((something & ~0x3) != something) it's not 4 bytes aligned
> > 
> > This is strange for me. Like this i.e 7 is not 4 bytes aligned but 8 is
> > ;)
> 
> Since when is 7 4 bytes aligned ?

Since when it is not? Depends how you store it in memory ;)

> > I think you've ment if ((&something & ~0x3) != &something)
> 
> I don't think bcs here (the var) something is most probably an addresse
> relative to the framebuffer (ie. an offset from the start of the video mem).
> This would then tell you if the local variable you are using for storing
> that value is aligned :)

Ok, if it's address then I withdraw my objections.
Torinthiel

-- 
 Waclaw "Torinthiel" Schiller       GG#: 542916, 3073512
   torinthiel(at)wp(dot)pl
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 "No classmates may be used during this examination"
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