GCC Optimizations for the i386 and i486 chips...

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#52016

From: Cory West
Date: Fri, 12 Feb 1993 17:53

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	Hello all.  I have recently been wondering about the Intel
specific optimizations.  The GCC info pages say:

> `-m486'
> `-mno486'
>    Control whether or not code is optimized for a 486 instead of an
>    386.  Code generated for an 486 will run on a 386 and vice versa.

	The Xfree86 FAQ says that (at least for the Xfree86 binaries)
generated code that is -m486 optimized does not take a performance hit when 
run on an i386 processor.  I can see how this would be true for all (or
almost all) code, but was wondering if anyone could confirm and/or elaborate 
on this and the reasons (or point me towards other sources of information).

	Many thanks in advance.


						Cory West,
						corywest@rice.edu

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From: corywest@owlnet.rice.edu (Cory West)
Subject: GCC Optimizations for the i386 and i486 chips...
Message-ID: <CORYWEST.93Feb12115345@rio-grande.owlnet.rice.edu>
Sender: news@rice.edu (News)
Organization: Well, none really, but I know where my socks are!
Date: Fri, 12 Feb 1993 17:53:45 GMT
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