Re: [PATCH] i386 rw_semaphores fix

Alan Cox (alan@lxorguk.ukuu.org.uk)
Wed, 11 Apr 2001 23:06:40 +0100 (BST)


> 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

>

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