Re: [PATCH] i386 rw_semaphores fix

H. Peter Anvin (hpa@transmeta.com)
Wed, 11 Apr 2001 15:42:15 -0700

Alan Cox wrote:
>
> > Yes, the big 686 optimization is CMOV, and that one is
> > ultra-pervasive.
>
> Be careful there. CMOV is an optional instruction. gcc is arguably wrong
> in using cmov in '686' mode. Building libs with cmov makes sense though
> especially for the PIV with its ridiculously long pipeline
>

It is just a matter how you define "686 mode", otherwise the very concept
is meaningless.

-hpa

-- 
<hpa@transmeta.com> at work, <hpa@zytor.com> in private!
"Unix gives you enough rope to shoot yourself in the foot."
http://www.zytor.com/~hpa/puzzle.txt
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/