In elf-m10300.c mn10300_elf_final_link_relocate() for the
R_MN10300_PCREL16 case at line 1221, we use a range that's twice as
big as I'd expect:
if ((long) value > 0xffff || (long) value < -0x10000)
return bfd_reloc_overflow;
Are there any real cases where we'd need this range, and not the usual
-0x8000..0x7fff range?
We do the same for PCREL8 just above it, too.