On Feb 25, 2007, at 4:47 AM, Pierre Dubuc wrote:

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> Replying to message <6e9741c60702242116o14cbb319mb3910a0515216188@mail.gmai 
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>> Date: Sun, 25 Feb 2007 00:16:20 -0500
>> From: Blair Sadewitz <blair.sadewitz@gmail.com>
>> To: Pierre Dubuc <pldubuc@yahoo.ca>
>> Cc: port-i386@netbsd.org
>> Newsgroups: gmane.os.netbsd.ports.i386
>> Subject: Re: Status of math_emulate
>> This is somewhat beside the point, but a 486DX has  an FPU; do you
>> need MATH_EMULATE?  Am I crazy? ;)
>>
>>
>
> Well, every other Pentium machine going around running a GENERIC  
> kernel uses the same MATH_EMULATE, so I guess they somehow bypass  
> the emulation dynamically, or something.

Yes, because the FP instructions don't cause a fault.

>
> As an experiment, I'll build a kernel without it and give it a try.
>
> - -- Pierre Dubuc
> pldubuc@yahoo.ca
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-- thorpej