Date: Fri, 03 Apr 1998 17:08:04 +0100 From: Peter Edwards <peter.edwards@isocor.ie> To: Nate Williams <nate@mt.sri.com> Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: bcopy implementation Message-ID: <35250964.F89A1631@isocor.ie> References: <857m57c8tr.fsf@localhost.zilker.net> <199804031420.QAA05837@ocean.campus.luth.se> <199804031547.IAA22090@mt.sri.com>
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> (The kernel doesn't save the contents of the FP registers, but since all > kernel calls are guaranteed to 'complete' before getting swapped, then > this isn't a problem in kernel-land.) > > Nate Huh? Surely the FP registers are saved? To get anything like decent speed math, I assume user programs can use floating point instructions directly. A quick look at /usr/src/sys/i386/i386/swtch.s and the save87 struct in /usr/include/sys/pcb.h seem to bear this out. Cheers, Peter. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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