From owner-freebsd-stable  Tue Jun 29 18: 2:18 1999
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Date: Wed, 30 Jun 1999 10:31:47 +0930 (CST)
From: "Daniel J. O'Connor" <darius@dons.net.au>
To: Frode Vatvedt Fjeld <frodef@acm.org>
Subject: RE: MMX
Cc: freebsd-stable@freebsd.org
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On 29-Jun-99 Frode Vatvedt Fjeld wrote:
>  What is the preferred way for my application to determine if the CPU
>  is MMX-capable?

Use some MMX instructions and see if you catch a SIGILL or not? :)

You could look through /var/run/dmesg.boot and have a look for ->
CPU: Pentium/P55C (quarter-micron) (233.86-MHz 586-class CPU)
  Origin = "GenuineIntel"  Id = 0x581  Stepping=1
  Features=0x8001bf<FPU,VME,DE,PSE,TSC,MSR,MCE,CX8,MMX>

Which is probably a much more sensible way.

---
Daniel O'Connor software and network engineer
for Genesis Software - http://www.gsoft.com.au
"The nice thing about standards is that there
are so many of them to choose from."
  -- Andrew Tanenbaum

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