[PATCH] Utilize i686, SSE and MMX by default on FreeBSD/i386

[John Baldwin]

On Thursday 18 March 2010 9:06:31 pm Xin LI wrote:
> Hi,
> 
> I think it doesn't really make sense to by default use MACHINE_CPU=i486
> when the kernel is built with SSE by default today.
> 
> Attached patch uses i686 SSE MMX by default, the user can always change
> the default setting by overriding CPUTYPE (they have to do it as SSE is
> enabled by default for several years).

The kernel is only built with support for userland applications using SSE, it 
does not _use_ SSE.  Similarly, the kernel is built with support for PG_NX 
provided on 64-bit processors, but it does not do so by failing to support 
older 32-bit processors.  I think this change is premature.  Users can already 
set CPUTYPE in make.conf.  Also, most modern x86 server-class machines are
64-bit in which case they would be running FreeBSD/amd64 and using SSE
already.

-- 
John Baldwin