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MN10300 gas: reject invalid uses of `epsw'

Daniel Jacobowitz drow@mvista.com
Mon Feb 11 11:54:00 GMT 2002 
On Mon, Feb 11, 2002 at 02:28:04PM -0200, Alexandre Oliva wrote:
> When assembling for the original mn10300/AM30, we accept `epsw' as a
> symbol name.  On AM33, `epsw' became a register name, that can be
> copied only to data registers with `mov epsw, d[0-3]'.  We currently
> accept silently instructions such as `mov epsw, a[0-3]' and encode
> `epsw' as a symbol name.
> 
> I'm pretty sure we should treat epsw as a register name whenever we
> encounter it on AM33, but I'm not sure what to do about epsw and pc
> when we encounter them while assembling for the AM30.  It seems to me
> that they should be regarded as symbol names, since code written
> originally for the AM30 could not have known that these names were
> going to be reserved, and might well have used them.  On the other
> hand, when porting code from AM30 to AM33, it might be nice to have
> uses of register names available on AM33 as errors, so I'm confused as
> to what would be best to do.
> 
> Comments?  Ok to install?  Ok for the 2.12 branch?

OK for branch once it's committed to trunk, yes.

-- 
Daniel Jacobowitz                           Carnegie Mellon University
MontaVista Software                         Debian GNU/Linux Developer
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