On Wed, May 25, 2011 at 10:19 AM, H.J. Lu <hjl.to...@gmail.com> wrote:
> --
> H.J.
> ---
> Index: doc/extend.texi
> ===================================================================
> --- doc/extend.texi (revision 174216)
> +++ doc/extend.texi (working copy)
> @@ -8699,7 +8699,8 @@ The following built-in function is alway
>
> @table @code
> @item void __builtin_ia32_pause (void)
> -Generates the @code{pause} machine instruction with full memory barrier.
> +Generates the @code{pause} machine instruction with a compiler memory
> +barrier.
What is the pause machine instruction do? How is it different from a
normal nop?
Also pause to me means it waits for input or an interrupt.
Thanks,
Andrew Pinski
