Question

Write the corresponding MIPS assembly equivalent of the given Ccode. Assume that register $s0 contains the base address for array arr. Use a register for each of the variables. (e.g. use $sl for total, etc.) and indicate them as a comment line in your code. int main() { inti, s = 10; int total, ps, ng int arr[10] = {3, -21, 18,0, 16, 85,-44, 23, 100, -20}; total = 0; ps = 0; ng = 0; for (i = 0; i <s; i++) { total += arr[i]; if (arr[i] > 0) ps += arr[i]; if (arr[i]<0) ng += arr[i]; } return 0; } ANSWER:

Answer 1

.LC0:

        .word   3

        .word   -21

        .word   18

        .word   0

        .word   16

        .word   85

        .word   -44

        .word   23

        .word   100

        .word   -20

main:

        daddiu  $sp,$sp,-80

        sd      $fp,72($sp)

        move    $fp,$sp

        lui     $8,%hi(%neg(%gp_rel(main)))

        daddu   $8,$8,$25

        daddiu  $8,$8,%lo(%neg(%gp_rel(main)))

        li      $2,10                 # 0xa

        sw      $2,16($fp)

        ld      $2,%got_page(.LC0)($8)

        daddiu  $3,$2,%got_ofst(.LC0)

        ldl     $4,%got_ofst(.LC0)($2)

        ldr     $4,7($3)

        move    $6,$4

        daddiu  $3,$2,%got_ofst(.LC0)

        ldl     $4,8($3)

        ldr     $4,15($3)

        move    $5,$4

        daddiu  $3,$2,%got_ofst(.LC0)

        ldl     $4,16($3)

        ldr     $4,23($3)

        daddiu  $3,$2,%got_ofst(.LC0)

        ldl     $7,24($3)

        ldr     $7,31($3)

        move    $3,$7

        daddiu  $2,$2,%got_ofst(.LC0)

        ldl     $7,32($2)

        ldr     $7,39($2)

        move    $2,$7

        sd      $6,24($fp)

        sd      $5,32($fp)

        sd      $4,40($fp)

        sd      $3,48($fp)

        sd      $2,56($fp)

        sw      $0,4($fp)

        sw      $0,8($fp)

        sw      $0,12($fp)

        sw      $0,0($fp)

        b       .L2

        nop

.L5:

        lw      $2,0($fp)

        dsll    $2,$2,2

        daddu   $2,$fp,$2

        lw      $2,24($2)

        lw      $3,4($fp)

        addu    $2,$3,$2

        sw      $2,4($fp)

        lw      $2,0($fp)

        dsll    $2,$2,2

        daddu   $2,$fp,$2

        lw      $2,24($2)

        blez    $2,.L3

        nop

        lw      $2,0($fp)

        dsll    $2,$2,2

        daddu   $2,$fp,$2

        lw      $2,24($2)

        lw      $3,8($fp)

        addu    $2,$3,$2

        sw      $2,8($fp)

.L3:

        lw      $2,0($fp)

        dsll    $2,$2,2

        daddu   $2,$fp,$2

        lw      $2,24($2)

        bgez    $2,.L4

        nop

        lw      $2,0($fp)

        dsll    $2,$2,2

        daddu   $2,$fp,$2

        lw      $2,24($2)

        lw      $3,12($fp)

        addu    $2,$3,$2

        sw      $2,12($fp)

.L4:

        lw      $2,0($fp)

        addiu   $2,$2,1

        sw      $2,0($fp)

.L2:

        lw      $3,0($fp)

        lw      $2,16($fp)

        slt     $2,$3,$2

        bne     $2,$0,.L5

        nop

        move    $2,$0

        move    $sp,$fp

        ld      $fp,72($sp)

        daddiu  $sp,$sp,80

        j       $31

        nop

lw lw addu $2,24($2) $3,12($fp) $2,$3, $2 $2,12($fp) SW .L4: lw addiu $2,0($fp) $2,$2,1 $2,0($fp) SW .L2: lw slt bne $3,0($fp) $2,16($fp) $2,$3,$2 $2,$0,.L5 nop move $2,$0 move $sp,$fp ld $fp,72($sp) daddiu $sp,$sp, 80 $31 nop 1069ms (5782B) Output (0/0) MIPS64 gcc 5.4 i u.