Question

在我上面写的这个当前例子中，我用80作为n。我的输出是n = 91，count = 42.这也称为McCarthy 91.但是我现在想在汇编语言（MIPS）中使用这个代码。有没有人有关于如何做到这一点的任何提示？我从未处理过在MIPS中构建递归类型程序的问题。下面我提供了我的工作python代码，以及带有注释的汇编代码，这些代码正在python代码下面编写。使用汇编代码肯定会有任何提示/帮助。

Python代码：

   def mcc91(n):
        global count
        count +=1
        if n > 100:
            return n -10
        else:
            return mcc91 (mcc91(n + 11))


    def main():
        print mcc91(80)
        print count

    main()

MIPS计划

.data
    p1:
        .asciiz "What is integer n? "
    ans1:
        .asciiz "\nn is "
    ans2:
        .asciiz "\nCount is "


        .text
        .globl main

    main:
        li $v0, 4       # system call code for print_str
        la $a0, p1      # address of string to print
        syscall         # print the first prompt

        li $v0, 5       # system call code for read_int
        syscall         # read the first integer
        move    $t1, $v0    # and store it 'till later

        li $t9, 0       #tracks count

    loop1:
        bgt $t1, 100, target1
        add $t1, $t1, 11    #adds 11 when under 100
        add $t9, $t9, 1     #add 1 to count
        Loop1(loop1     #cluless how to do this

    target1:
        sub $t1, $t1, 10    #subtracts 10 when over 100
        add $t9, $t9, 1     #add 1 to count
        #j done         #cluless here also(how many stacks in is it? If 0, jump to done)

    done:
    #THIS PRINTS N
        li $v0, 4       # system call code for print_str
        la $a0, ans1        #address of string to print
        syscall         # print the answer identifying string

        li $v0, 1       # system call code for print_int
        move $a0, xxxxx     # integer to print (sum)
        syscall         # print it

    #THIS PRINTS Count
        li $v0, 4       # system call code for print_str
        la $a0, ans2        # address of string to print
        syscall         # print the answer identifying string

        li $v0, 1       # system call code for print_int
        move $a0, xxxxx     # integer to print (difference)
        syscall         # print it


        jr $ra          # return from this program to the system

Answer 1

将python编译为C，然后使用您选择的C编译器将其转换为汇编。

将Python代码转换为程序集

1 个答案: