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

[Måns Rullgård]

Michael Niedermayer <michaelni at gmx.at> writes:

> 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

True.

> This would be easier than .S

I doubt that.

-- 
M?ns Rullg?rd
mans at mansr.com