Exercise 5.13 · 习题

Exercise 5.13: Modify the simulator so that it

uses the controller sequence to determine what registers the machine has rather

than requiring a list of registers as an argument to make-machine.

Instead of pre-allocating the registers in make-machine, you can

allocate them one at a time when they are first seen during assembly of the

instructions.

练习 5.13：修改模拟器，使其通过控制器序列来确定机器拥有哪些寄存器，而不是要求在 make-machine 的参数中给出寄存器表。不必在 make-machine 中预先分配寄存器，而是在汇编指令时第一次遇到某寄存器时再为其分配。