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Re: [PATCH] Update mtfsf and mtfsfi instructions to support new optional operands.

On Thu, May 17, 2007 at 09:38:58PM +0200, Segher Boessenkool wrote:
> >>Shouldn't the new forms be marked POWER6-only, not COM?
> >
> >Yes, but then you'd have two entries for the same opcode and you'd
> >need to introduce a NOPOWER6 flag so that only one entry was used.
> 
> Wouldn't it work to do two entries, the POWER6 variant
> first?  The table is searched in order, there are more
> things that depend on that already.  Or would the assembler
> have issues with this?

The assembler would die with a "duplicate instruction" error.  See
tc-ppc.c:ppc_setup_opcodes.

-- 
Alan Modra
IBM OzLabs - Linux Technology Centre
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