Re: kernel + gcc 4.1 = several problems

[Grzegorz Kulewski]

On Wed, 3 Jan 2007, Alan wrote:
> The proper fix for all of this mess is to fix the gcc compiler suite to
> actually generate i686 code when told to use i686. CMOV is an optional
> i686 extension which gcc uses without checking. In early PIV days it made
> sense but on modern processors CMOV is so pointless the bug should be
> fixed. At that point an i686 kernel would contain i686 instructions and
> actually run on all i686 processors ending all the i586 pain for most
> users and distributions.

Could you explain why CMOV is pointless now? Are there any benchmarks 
proving that?


Thanks,

Grzegorz Kulewski

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