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Re: PATCH: PR target/39911: The 'z' suffix doesn't work with 16bit integer insn


>> Due to this, I don't think that we need to provide backward compatibility
>> with _undocumented_ %z for x87 insns.
> 
> The %z on x87 insns is widely used in gcc sources. It is one kind of
> documentation.

No, it is not.  Undocumented operand modifiers are, well, undocumented,
and if we decide to use a letter for something else there's no reason
not to do so.

In fact, operand modifiers are not documented at all except ia64 `%Pn'.

Paolo


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