Messages in this thread | | | Date | Wed, 3 Jan 2007 11:32:00 +0100 (CET) | From | Grzegorz Kulewski <> | Subject | Re: kernel + gcc 4.1 = several problems |
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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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