Dne 26. 11. 23 v 16:56 Paolo Bonzini napsal(a): > > > Il sab 25 nov 2023, 13:23 Petr Cvek <petrcve...@gmail.com > <mailto:petrcve...@gmail.com>> ha scritto: > > GCC defines __i386__ for i386 and i486, which both lack RDTSC instruction. > The i386 seems to be impossible to distinguish, but i486 can be identified > by checking for undefined __i486__. > > > As far as I know QEMU cannot be run on i486 anyway since TCG assumes the > presence of CPUID. Have you actually tried? >
Yes I tried running x86_64 mesa3d glxgears on amd 5x86. It worked with about 5 fps :). Latest 486 CPUs supports CPUID btw. > Paolo > > > Signed-off-by: Petr Cvek <petrcve...@gmail.com > <mailto:petrcve...@gmail.com>> > --- > include/qemu/timer.h | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/include/qemu/timer.h b/include/qemu/timer.h > index 9a366e551f..7baa5d1d41 100644 > --- a/include/qemu/timer.h > +++ b/include/qemu/timer.h > @@ -872,7 +872,7 @@ static inline int64_t cpu_get_host_ticks(void) > return retval; > } > > -#elif defined(__i386__) > +#elif defined(__i386__) && !defined(__i486__) > > static inline int64_t cpu_get_host_ticks(void) > { > -- > 2.43.0 >
