add h8sx support to h8300

[Richard Sandiford]

Alexandre Oliva <aoliva@redhat.com> writes:
>> !       if (!regs_ever_live[HFP_REG])
>> ! 	return NO_REGS;
>
> I had both HFP_REG and FP_REG at some point.  I thought this would
> minimize the risk of running into the failure case.  Don't you think
> so?

I wouldn't have thought checking for FP_REG was necessary.  It really is
the liveness of er6 that we're concerned about.  Perhaps DESTINATION_REG
would be more self-documenting than HFP_REG...

Richard