cvs commit: src/lib/libc/i386/net htonl.S ntohl.S

John Baldwin jhb at
Wed Oct 20 13:39:18 PDT 2004

On Wednesday 20 October 2004 04:20 pm, Pawel Jakub Dawidek wrote:
> On Wed, Oct 20, 2004 at 03:53:40PM -0400, John Baldwin wrote:
> +> For 6.0 we are (finally!) going to just drop 80386 altogether.  I've
> been +> wanting to do this personally since early SMPng days, but we came
> to an +> agreement back then and since we've already gone and branched
> RELENG_5 and +> frozen the ABI I think we should stick to the previously
> agreed-upon plan.
> So maybe it is good time to think about 486 in 6.x.
> I don't know how much can we get from dropping support for 486, but maybe
> it's worth it.
> Before the next war will start, the good argument for me is, that
> FreeBSD 5.x is still going to work on 486 and we should move on.

There's not a whole lot to gain from dropping 486.  486 added cmpxchg (biggie 
for SMP stuff), invlpg (better TLB shootdowns), bswap, and a few other odds 
and ends.  The changes that later processors bring are less dramatic and more 
specialized, so it's less of an issue.

John Baldwin <jhb at>  <><
"Power Users Use the Power to Serve"  =

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