Date: Thu, 9 Jan 2003 17:51:48 -0500 (EST) From: Andrew Gallatin <gallatin@cs.duke.edu> To: Mikhail Teterin <mi+mx@aldan.algebra.com> Cc: Alexander Leidinger <Alexander@Leidinger.net>, 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: <15901.64772.844070.407901@grasshopper.cs.duke.edu> In-Reply-To: <200301091704.56189.mi%2Bmx@aldan.algebra.com> References: <15900.19798.145783.459116@grasshopper.cs.duke.edu> <20030109123807.64457d5d.Alexander@Leidinger.net> <15901.60186.784326.204122@grasshopper.cs.duke.edu> <200301091704.56189.mi%2Bmx@aldan.algebra.com>
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Mikhail Teterin writes: > 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 Strange. The intel compiler is slower too. But at least it gets the right answer, which is more than gcc can do (unless O0 is used) icc -O3 -tpp7 -xW: (P4) 2^2.1 is 4.28709 11^-2.1 is 0.00650243 5.77 real 5.68 user 0.02 sys icc -O3 -tpp6 -xK: (PIII) 2^2.1 is 4.28709 11^-2.1 is 0.00650243 5.38 real 5.13 user 0.00 sys gcc -O3 -march=pentium4 2^2.1 is 0.5 11^-2.1 is 0.0909091 0.63 real 0.62 user 0.00 sys gcc -O3 -march=pentium3 2^2.1 is 4.28709 11^-2.1 is 0.00650243 6.68 real 6.50 user 0.01 sys I still build my system with CPUTYPE=p3, so I think my libs are OK. Drew To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message
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