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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