Messages in this thread | | | Date | Wed, 11 Apr 2001 15:42:15 -0700 | From | "H. Peter Anvin" <> | Subject | Re: [PATCH] i386 rw_semaphores fix |
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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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