Question

Please complete in MASM (x86 assembly language). Use the code below to get started.

Use a loop with indirect or indexed addressing to reverse the elements of an integer array in

place. Do not copy the elements to any other array. Use the SIZEOF, TYPE, and LENGTHOF

operators to make the program as flexible as possible if the array size and type should be

changed in the future.

.386
.model flat,stdcall
.stack 4096
ExitProcess PROTO,dwExitCode:DWORD

.data
   ; define your variables here

.code
main PROC
   ; write your assembly code here

   INVOKE ExitProcess,0
main ENDP
END main

Answer 1

Below is the assembly language code for inplace reversing of array.

daddiu  $sp,$sp,-64

        sd      $fp,56($sp)

        move    $fp,$sp

        lui     $6,%hi(%neg(%gp_rel(main)))

        daddu   $6,$6,$25

        daddiu  $6,$6,%lo(%neg(%gp_rel(main)))

        ld      $2,%got_page(.LC0)($6)

        daddiu  $3,$2,%got_ofst(.LC0)

        ldl     $3,7($3)

        ldr     $3,%got_ofst(.LC0)($2)

        move    $4,$3

        daddiu  $3,$2,%got_ofst(.LC0)

        ldl     $5,15($3)

        ldr     $5,8($3)

        move    $3,$5

        daddiu  $2,$2,%got_ofst(.LC0)

        ldl     $5,23($2)

        ldr     $5,16($2)

        move    $2,$5

        sd      $4,16($fp)

        sd      $3,24($fp)

        sd      $2,32($fp)

        li      $2,6                        # 0x6

        sw      $2,0($fp)

        sw      $0,4($fp)

        lw      $2,0($fp)

        addiu   $2,$2,-1

        sw      $2,8($fp)

.L3:

        lw      $3,4($fp)

        lw      $2,8($fp)

        slt     $2,$3,$2

        beq     $2,$0,.L2

        nop

        lw      $2,4($fp)

        dsll    $2,$2,2

        daddu   $2,$fp,$2

        lw      $2,16($2)

        sw      $2,12($fp)

        lw      $2,8($fp)

        dsll    $2,$2,2

        daddu   $2,$fp,$2

        lw      $3,16($2)

        lw      $2,4($fp)

        dsll    $2,$2,2

        daddu   $2,$fp,$2

        sw      $3,16($2)

        lw      $2,8($fp)

        dsll    $2,$2,2

        daddu   $2,$fp,$2

        lw      $3,12($fp)

        sw      $3,16($2)

Thank You.