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From: des@des.no (Dag-Erling =?iso-8859-1?Q?Sm=F8rgrav?=)
To: Andrew Reilly <andrew-freebsd@areilly.bpc-users.org>
References: <20070406025700.GB98545@garage.freebsd.pl>
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Date: Fri, 13 Apr 2007 17:59:52 +0200
In-Reply-To: <20070413031422.GA27743@duncan.reilly.home> (Andrew Reilly's
	message of "Fri, 13 Apr 2007 13:14:22 +1000")
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Cc: freebsd-fs@FreeBSD.ORG, Craig Boston <craig@xfoil.gank.org>,
	"Rick C. Petty" <rick-freebsd@kiwi-computer.com>,
	freebsd-current@FreeBSD.ORG
Subject: Re: ZFS committed to the FreeBSD base.
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Andrew Reilly <andrew-freebsd@areilly.bpc-users.org> writes:
> Apart from the fact that you are correct, how long is the
> instruction encoding of cmpxchg8?

Three bytes (0F C7 m64), four for "lock cmpxchg8" (F0 0F C7 m64).  If
the top two bits of m64 are set, you may get "interesting" results :)

DES
--=20
Dag-Erling Sm=F8rgrav - des@des.no