as has only one machine-dependent directive for the
H8/300:
.h8300h
Recognize and emit additional instructions for the H8/300H variant, and
also make .int emit 32-bit numbers rather than the usual (16-bit)
for the H8/300 family.
On the H8/300 family (including the H8/300H) `.word' directives
generate 16-bit numbers.