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Date: Thu, 13 Jun 1996 00:17:23 -0700 (PDT)
From: Satoshi Asami <asami>
Message-Id: <199606130717.AAA27027@freefall.freebsd.org>
To: CVS-committers, cvs-all, cvs-sys
Subject: cvs commit:  src/sys/i386/i386 support.s trap.c
Sender: owner-cvs-sys@FreeBSD.ORG
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asami       96/06/13 00:17:22

  Modified:    sys/i386/i386  support.s trap.c
  Log:
  A fast memory copy for Pentiums using floating point registers.
  It is called from copyin and copyout.
  
  The new routine is conditioned on I586_CPU and I586_FAST_BCOPY, so you
  need
  
  options "I586_FAST_BCOPY"
  
  (quotes essenstial) in your kernel config file.
  
  Also, if you have other kernel types configured in your kernel, an
  additional check to make sure it is running on a Pentium is inserted.
  (It is not clear why it doesn't help on P6s, it may be just that the
   Orion chipset doesn't prefetch as efficiently as Tritons and friends.)
  
  Bruce can now hack this away. :)
  
  Revision  Changes    Path
  1.37      +191 -1    src/sys/i386/i386/support.s
  1.78      +9 -1      src/sys/i386/i386/trap.c