Autoincrement addressing modes

[Jeffrey A Law]

  In message < 199802112304.XAA11969@phal.cygnus.co.uk >you write:
  > > At this stage I'm interested in what other common forms should be
  > > supported.
  > 
  > The SH doesn't have any exotic update forms, but it has another
  > quirk in autoincrement that gcc doesn't handle efficiently:
  > POST_INC is only available for reading, while PRE_DEC is only
  > available for writing.
The PA has similar constraints.

jeff