New argument `want'. Update enum cgen_parse_operand_result values. Initialize if CGEN_PARSE_OPERAND_INIT. * config/tc-m32r.c (md_begin): Set cgen_parse_operand_fn. (md_assemble): Call cgen_asm_init_parse. Update call to m32r_cgen_assemble_insn, call as_bad if assembly failed.