Date: Fri, 6 Apr 2007 22:17:49 +0200 From: Ed Schouten <ed@fxq.nl> To: Nikolas Britton <nikolas.britton@gmail.com> Cc: FreeBSD Current <freebsd-current@freebsd.org> Subject: Re: Do we need this junk? Message-ID: <20070406201749.GF6950@hoeg.nl> In-Reply-To: <ef10de9a0704061243o6c7d3118neb702b7c925db97a@mail.gmail.com> References: <ef10de9a0704050258l4ea754b3n99a1239a81b844a0@mail.gmail.com> <20070405103708.GC842@turion.vk2pj.dyndns.org> <ef10de9a0704050839g7b873dabw5a5e211140781781@mail.gmail.com> <20070405.140109.39240822.imp@bsdimp.com> <ef10de9a0704060715s6b5957daq2fe8a465362e3446@mail.gmail.com> <20070406142326.GC6950@hoeg.nl> <ef10de9a0704060731l71186e1duea689617af407f4b@mail.gmail.com> <20070406153500.GE6950@hoeg.nl> <ef10de9a0704061243o6c7d3118neb702b7c925db97a@mail.gmail.com>
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--f61P+fpdnY2FZS1u Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable * Nikolas Britton <nikolas.britton@gmail.com> wrote: > The legacy bits don't upset me, what upsets me is sacrificing > performance so we can support a minority of legacy systems. IIRC? we > could recode the Kernel for SSE2 math if the processor was guaranteed > to have that SSE2. SSE2 adds 214 new instructions to the existing x86 > instruction set. But SSE2 isn't even used in kernel space, not even on AMD64. As far as I can see, the only exception I can see is pagezero. Just take a look at src/sys/conf/kern.mk. If it's not even possible to use SSE2 in kernelspace on amd64, why would it be possible to do so on i386? --=20 Ed Schouten <ed@fxq.nl> WWW: http://g-rave.nl/ --f61P+fpdnY2FZS1u Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (FreeBSD) iD8DBQFGFqrt52SDGA2eCwURAj7nAJ0Y5Pm+vSYTy9Y+Im2qwsDDv/np5gCfe60G U9GwG9kJXwW1kjIompdGYh4= =vP42 -----END PGP SIGNATURE----- --f61P+fpdnY2FZS1u--
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