[FFmpeg-devel] ASM support for MACOSX 10.5: really?

[Michael Niedermayer]

On Tue, Mar 25, 2008 at 09:48:46PM +0100, matthieu castet wrote:
> Michael Niedermayer wrote:
> > On Tue, Mar 25, 2008 at 07:04:10PM +0000, Robert Swain wrote:
> > 
> > (all with -fPIC -DPIC)
> > 2.95        works
> > 3.3         works
> > 3.4         works
> > 4.0         works
> > 4.1         works
> > 4.2         5 "error: 'asm' operand has impossible constraints" nonsense
> > 4.3         3 "error: 'asm' operand has impossible constraints" nonsense
> > 4.4         3 "error: 'asm' operand has impossible constraints" nonsense
> > 
> > so, if someone wants to use latestest and "greatest" gcc go report it.
> > 
> > Also if someone wants to workaround it in ffmpeg, no problem, the code
> > though must not be slower!
> > The whole loop of that code should be written in a asm( ) anyway, no
> > stincky for(){asm()}.
> > 
> Even better the code is most assembler and should be easily written in 
> pure assembler (*.S). The tricky part could be to access global variable.
> That way no dependence on gcc.

You can write the whole function in an asm() and use MANGLE to access globals
This would be easier than .S

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Its not that you shouldnt use gotos but rather that you should write
readable code and code with gotos often but not always is less readable
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