Il sab 25 nov 2023, 13:23 Petr Cvek <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?
Paolo
> Signed-off-by: Petr Cvek <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
>
>
