On 04/07/2016 10:32 AM, Emilio G. Cota wrote:
> Taken from the linux kernel.
>
> Signed-off-by: Emilio G. Cota <c...@braap.org>
> ---
> include/qemu/processor.h | 28 ++++++++++++++++++++++++++++
> 1 file changed, 28 insertions(+)
> create mode 100644 include/qemu/processor.h
Reviewed-by: Richard Henderson <r...@twiddle.net>
> +#if defined(__i386__) || defined(__x86_64__)
> +#define cpu_relax() asm volatile("rep; nop" ::: "memory")
> +#endif
Not that it matters much, but for the record there's an ICC inspired builtin in
<xmmintrin.h> for this: _mm_pause(). But so long as we're always using gcc or
clang, that's probably just an extra dependency to worry about.
r~
