From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Mon, 25 Oct 1999 17:44:35 -0500 From: erik cameron To: Jim Terman Cc: Claude Robitaille , linuxppc-dev@lists.linuxppc.org Subject: Re: question about altivec registers Message-ID: <19991025174435.D9975@senta.uchicago.edu> References: <199910252051.NAA07105@sade.ddi.com> <199910252231.PAA08775@sade.ddi.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <199910252231.PAA08775@sade.ddi.com> Sender: owner-linuxppc-dev@lists.linuxppc.org List-Id: perhaps this is a stupid question, but aren't the values of the altivec registers just saved as part of the process' hardware context and swapped in and out as part of a context switch? in which case it wouldn't matter if the kernel (or any other process) changed the values while your job was on a sleeping. On Mon, Oct 25, 1999 at 03:31:48PM -0700, Jim Terman wrote: > > I understand how to get it working from the processor point of view. I > just want to make sure that the linuxppc kernal will not interfere if I > compile a program that uses these registers. > > The bottom line is that I am not looking for any help with the altivec > registers from the kernal. I just want to be sure that there will not > be any inteference. If not, great. I'd just like that insurance. > Thanks for any clarification you can give me. > > Claude Robitaille writes: > > There is a flag for that purpose. You should look into the Altivec > > environment on Motorola's Web site, or at www.altivec.org > > > > Claude > > > > > > On Mon, 25 Oct 1999, Jim Terman wrote: > > > > > > > > I have a question about using the altivec registers on a G4 Macintosh > > > running linuxppc. Will there be any conflicts. I don't expect any > > > kernal support, but can I be confident that the kernal will not touch > > > any of the altivec registers. Any info will be greatly appreciated. > > > > > > -- > > > ______________________________________________________________________________ > > > Jim Terman | 323 Vintage Park Dr. | Voice: (650) 356-5446 > > > terman@ddi.com | Foster City, CA | Fax: (650) 356-5490 > > > Diab-SDS, Inc. | 94404 | web site - http://www.ddi.com > > > > > > > > > > > -- > ______________________________________________________________________________ > Jim Terman | 323 Vintage Park Dr. | Voice: (650) 356-5446 > terman@ddi.com | Foster City, CA | Fax: (650) 356-5490 > Diab-SDS, Inc. | 94404 | web site - http://www.ddi.com -- erik cameron unix systems administrator jfi/mrsec @ the university of chicago e-cameron@uchicago.edu ** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/