use 32-bit double ABI
  -mlong-double           use 64-bit double ABI (default)
  --force-long-branches   always turn relative branches into absolute ones
  -S,--short-branches     do not turn relative branches into absolute ones
                          when the offset is out of range
  --strict-direct-mode    do not turn the direct mode into extended mode
                          when the instruction does not support direct mode
  --print-insn-syntax     print the syntax of instruction in case of error
  --print-opcodes         print the list of instructions with syntax
  --xgate-ramoffset       offset ram addresses by 0xc000
  --generate-example      generate an example of each instruction
                          (used for testing)