cswiger at mac.com
Wed Jan 14 12:18:45 PST 2009
On Jan 14, 2009, at 10:15 AM, Ewald Jenisch wrote:
> On Wed, Jan 14, 2009 at 04:37:53PM +0100, icemaca wrote:
>> this i386 version has
>> cpu I486_CPU
>> cpu I586_CPU
>> cpu I686_CPU
> Basically you can comment all but I686_CPU since the others are for
> earlier x86 architectures.
While it is true that you can comment out all but i686 and get a
working kernel, you will experience reduced performance. There are a
number of low-level assembly routines (cf sys/i386/i386/support.s such
as i586_bcopy) that are conditionalized off of I586_CPU only, even
though they provide an advantage on i686 platforms also.
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