Date: Sat, 15 Nov 1997 13:00:16 -0500 (EST) From: "John S. Dyson" <toor@dyson.iquest.net> To: evanc@synapse.net (Evan Champion) Cc: freebsd-current@FreeBSD.ORG Subject: Re: bcopy via npx not in 686 version? Message-ID: <199711151800.NAA04220@dyson.iquest.net> In-Reply-To: <Pine.BSF.3.96.971115113404.220N-100000@cello.synapse.net> from Evan Champion at "Nov 15, 97 11:42:17 am"
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Evan Champion said: > I was just looking through LINT and came upon the npx0 options to optimize > bcopy/bzero/copyin/copyout. These seem to be the only 586-specific > options in FreeBSD (Everything else is ifdef'd for both 586 and 686). > > I'm just curious if this was the desired behaviour, or if it was > accidently left out? > There isn't an advantage using the FPU for bcopys on P6 processors. In fact, movs[*] instructions are optimized on a P6. -- John dyson@freebsd.org jdyson@nc.com
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