asm_operand
void asm_operand(const struct asm_oper *, char *, size_t, uint64_t);
asm_operand(i->i_oper+0, buf, sizeof(buf), ip);
asm_operand(i->i_oper + n, buf, sizeof(buf), ip);
asm_operand(i->i_oper+0, buf, sizeof(buf), loc);
asm_operand(i->i_oper + n, buf, sizeof(buf), loc);