Re: [PATCH] i386 rw_semaphores fix

[H. Peter Anvin]

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

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