[FFmpeg-devel] [PATCH]Use pushfl/popfl in cpuid.c

[Reimar Döffinger]

On Mon, Nov 24, 2008 at 03:32:21AM +0100, Michael Niedermayer wrote:
> On Sun, Nov 23, 2008 at 08:42:11PM +0100, Reimar D?ffinger wrote:
> > On Sun, Nov 23, 2008 at 07:34:49PM +0100, Michael Niedermayer wrote:
> > > so it seems we are back to .byte 0x9C
> > 
> > Hm, I'd be in favour of disabling the check on x86_64 and then going for
> > pushfl, or do you dislike that for some reason?
> 
> IMHO if there is a cpuid flag on x86_64 (and i think there is but i
> didnt check) then it seems correct to check it ..
> but of course the argument, that all x86_64 cpus will likely support
> cpuid is pretty good as well, so i surely have no strong oppinion on 
> this

Well, I just checked, the x86_64 specification does not actually require
it it seems.
How about
#ifdef ARCH_X86_64
#define PUSHF "pushfq\n\t"
#define POPF  "popfq\n\t"
#else
#define PUSHF "pushfl\n\t"
#define POPF  "popfl\n\t"
#endif
?

Greetings,
Reimar D?ffinger