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Mail Archives: cygwin/2010/03/21/00:12:15

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Date: Sun, 21 Mar 2010 16:12:03 +1100
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To: cygwin AT cygwin DOT com
Subject: Re: Cygwin vs Via C3: nothing happens, no output
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>> According to the internets... the C3 purports to be a i686-class
>> processor
> Without CMOV or out-of-order execution, that seems a bit of a scam.
[snip]
> For gcc, "i686" implies the presence of the CMOV instruction, because,
> well, CMOV was introduced with the Intel 686 (aka Pentium Pro). 

What's in a name?  GCC can define it as march=hamburger but that doesn't
make it so, it's just a name of convenience/convention.  I assume
Intel's specs/contracts define what is/can be called an i686, so if they
say it's optional then the C3 is still a legit i686 even if CMOV support
is more common.

> Btw, that was almost fifteen years ago.

Well, if ya wanna make a fanless i686 (ish) CPU that runs on five (5)
watts or less, you gotta leave a few things out.

This just means my legacy app is stuck on a 60watt beigebox instead
(since VirtualBox's serial port support is broken).

Thanks anyway.

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