MIPS——循环语句

有关指令

 add $t1,$t2,$t3              #寄存器+寄存器，$t1 = $t2 + $t3
 add $t1,$t2,immediate        #寄存器+立即数，$t1 = $t2 + immediate
 ble $t1,immediate            #Branch if less or equal, $t1 <= immediate
 syscall                      #将要输出的整数值放入$a0,将$v0设为1，输出$a0

 C语言代码

 #include<stdio.h>

 int main()
 {
     int i = ;
     int sum = ;
     do
     {
         sum = sum + i;
         i = i + ;
     } while (i <= );

     printf("%d\n", sum);

     return ;
 }

C语言中的循环语句有for循环、while循环、do-while循环，貌似do-while循环更接近MIPS的风格

MIPS代码

 li $t0,                 #$t0: i
 li $t1,                 #$t1: sum

 loop:
     add $t1,$t1,$t0
     add $t0,$t0,

 ble $t0,,loop         #如果i <= ,跳转到loop继续循环

 move $a0,$t1
 li $v0,
 syscall