displacement range, and changes them to
     use the 16-bit displacement form.  (That is: the linker turns
     'mov.b '@'D:32,ERx' into 'mov.b '@'D:16,ERx' whenever the
     displacement D is in the 16 bit signed integer range.  Only
     implemented in ELF-format ld).

_bit manipulation instructions_
     'ld' finds all bit manipulation instructions like 'band, bclr,
     biand, bild, bior, bist, bixor, bld, bnot, bor, bset, bst, btst,
     bxor' which use 32 bit and 16 bit absolute address form, but refer
     to the top page of memory, and changes them to use the 8 bit
     address form.  (That is: the linker turns 'bset #xx:3,'@'AA:32'
     into 'bset #xx:3,'@'AA:8' whenever the address AA is in the top
     page of memory).

_system control instructions_
     'ld' finds all 'ldc.w, stc.w' instructions which use the 32 bit
     absolute address form, but refer to the top page of memory, and
     changes them to use 16 bit address form.  (That is: the linker
     turns 'ldc.w '@'AA:32,ccr' into 'ldc.w '@'AA:16,ccr' whenever the
     address AA is in the top page of memory).