DragonFly BSD
DragonFly kernel List (threaded) for 2003-12
[Date Prev][Date Next]  [Thread Prev][Thread Next]  [Date Index][Thread Index]

Re: libcaps thread testing code committed

From: David Leimbach <leimy2k@xxxxxxx>
Date: Mon, 8 Dec 2003 11:08:24 -0600

On Dec 8, 2003, at 10:33 AM, Sander Vesik wrote:

Craig Dooley <cd5697@xxxxxxxxxx> wrote:
I dont think this will work. Anything before the pIII did not have SSE,
so PPro, PII, old Xeons are now useless? Also, even the pIII only had
SSE, not SSE2, so there is no way to do double precision floating point
with just SSE. Any Athlon before they went to XP I believe does not
have SSE, and I think there might also be no SSE2 in AMD Chips except
Athlon64 and maybe Barton. I dont think this many CPU families can be
dropped. They will have to be supported though.

Worse, K8 is the first AMD processor that has SSE2, similarily several of the minority x86 processors don't have it. So this is basicly a bad idea.

Yeah... sometimes you actually do want double precision floating point to work :).

That's the problem with Altivec... even on the G5 it doesn't do double precision. Luckilly
PowerPC has a pretty good floating point unit anyway.


-- Sander

+++ Out of cheese error +++

[Date Prev][Date Next]  [Thread Prev][Thread Next]  [Date Index][Thread Index]