[patch] config/h8300/h8300.h (EIGHTBIT_CONSTANT_ADDRESS_P): Accept H8/S.

[Jeffrey A Law]

  In message < 41ECF07CC183D111A6F800805FEDAB190CE6AC@EXCHANGE1 >you write:
  > Hi Jeff,
  > 
  > > The H8/S also has 32bit addresses, but all 32bits are 
  > > significant.  the
  > > top 256 bytes of a 32bit address are 0xffffff00 - 0xffffffff 
  > > inclusive.
  > > 
  > > ie, the areas where 8 bit accesses are valid are _not_ the same if my
  > > recollection of addressing modes on the H8 series are correct.
  > 
  > I called up Hitachi Technical Support. They said the upper 8 bits are
  > _still_ dont-cares on H8/S as well as H8/300H and that the chip (both
  > internally and externally) has only 24 bits.
Is that the implementation or the specification?

I just checked my H8/S manual and the specification is 32 bit addresses and
thus we should not install this patch, even if the current H8/S implementations
only support 24bit addresses.

If you really want to support this on the H8/S, then you would have to create
a chip specific flag for an implementation of the H8/S architecture that you
could use to enable this optimization. 

Jeff