branch insn question

[Dmitry Eremin-Solenikov]

Hello,

I've a small problem with branch instructions on my platorm (m68hc08).
All branch instructions are only short-ranged (signed 8bit offset).
The recommended way to handle this is to emit jump-over code: instead of
  beq _long_label
emit:
  bne .Lshort
  jmp _long_label
  .Lshort:

My question is: should this be handled somehow by cgen? Or this should
be completely done via gas relaxation? And what attributes should I use
on branch instructions in .cpu file?

Thank you.

-- 
With best wishes
Dmitry