Question

Write MIPS assembly code for the following C code.

for (i = 10; i < 30; i ++)

{

if ((ar[i] > b) || (ar[i] <= c))

ar[i] = 0;

else

ar[i] = a;

}

Answer 1

I created a function named s to get the mips output.

int s() {
    int i,a,b,c;
    int ar[20];


    for (i = 10; i < 30; i ++)
    {
        if ((ar[i] > b) || (ar[i] <= c))
            ar[i] = 0;
        else
            ar[i] = a;
    }
}

Explanation:

Here is the Mips conversion

s:
        push    rbp
        mov     rbp, rsp
        mov     DWORD PTR [rbp-4], 10
        jmp     .L2
.L6:
        mov     eax, DWORD PTR [rbp-4]
        cdqe
        mov     eax, DWORD PTR [rbp-96+rax*4]
        cmp     DWORD PTR [rbp-8], eax
        jl      .L3
        mov     eax, DWORD PTR [rbp-4]
        cdqe
        mov     eax, DWORD PTR [rbp-96+rax*4]
        cmp     DWORD PTR [rbp-12], eax
        jl      .L4
.L3:
        mov     eax, DWORD PTR [rbp-4]
        cdqe
        mov     DWORD PTR [rbp-96+rax*4], 0
        jmp     .L5
.L4:
        mov     eax, DWORD PTR [rbp-4]
        cdqe
        mov     edx, DWORD PTR [rbp-16]
        mov     DWORD PTR [rbp-96+rax*4], edx
.L5:
        add     DWORD PTR [rbp-4], 1
.L2:
        cmp     DWORD PTR [rbp-4], 29
        jle     .L6
        nop
        pop     rbp
        ret