Date: Thu, 9 Jan 2003 17:04:56 -0500 From: Mikhail Teterin <mi+mx@aldan.algebra.com> To: Andrew Gallatin <gallatin@cs.duke.edu>, Alexander Leidinger <Alexander@Leidinger.net> Cc: cvs-all@FreeBSD.ORG, cvs-committers@FreeBSD.ORG, marius@alchemy.franken.de Subject: Re: cvs commit: src/sys/i386/i386 mp_machdep.c Message-ID: <200301091704.56189.mi%2Bmx@aldan.algebra.com> In-Reply-To: <15901.60186.784326.204122@grasshopper.cs.duke.edu> References: <15900.19798.145783.459116@grasshopper.cs.duke.edu> <20030109123807.64457d5d.Alexander@Leidinger.net> <15901.60186.784326.204122@grasshopper.cs.duke.edu>
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On Thursday 09 January 2003 04:35 pm, Andrew Gallatin wrote: = BTW, is enabling SSE2 instruction generation safe? Eg, they don't use = registers which could be clobbered by a context switch or something? I = know we need CPU_ENABLE_SSE (which is now default) for SSE, but I was = just wondering if there was more we needed for sse2? You may wish to take a look at http://www.FreeBSD.org/cgi/query-pr.cgi?pr=bin/43299 Especially, the follow up to it, where using SSE2 appears to slow things down -- at least for double values. -mi To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message
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