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List:       axp-redhat
Subject:    Re: Possibly a stupid question about 21164/21064 instruction diffs.
From:       Richard Henderson <rth () cygnus ! com>
Date:       1998-12-31 8:58:49
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On Wed, Dec 30, 1998 at 10:16:17PM +0100, Joachim Wesner wrote:
> > There are no 21164 vs 21064 instruction differences.
> > 
> Sure ???? What about Byte/Word extension (BWX) instructions ?? I thought
> this is only in EV5, EV56, PCA56 and up (>= 21164x). (IMPLVER = 1)

You should have read the next line concerning 21164a. 
EV56 implements BWX, plain old EV5 does not.

> However, does gcc/egcs ever use those ??

Sure, -mcpu=ev56, or at compiler configure time use alphaev56-*.
This is probably just egcs and gcc 2.8.


r~

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