Fix various typos. Add "PAREN" operand.
(MEM, MEM2): Define.
(mn10300_opcodes): Surround all memory addresses with "PAREN"
operands. Fix several typos.
Should parse all opcodes in the instruction specification, except the
"user extension instructions".
(mn10300_operands): Rough cut. Enough to parse "mov" instructions
at this time.
(mn10300_opcodes): Break opcode format out into its own field.
Update many operand fields to deal with signed vs unsigned
issues. Fix one or two typos in the "mov" instruction
opcode, mask and/or operand fields.
Checkpointing today's work. Matsushita.
