Question $1$:

Write the assembly code to REVERSE the elements of your name array. Do not copy the elements to any other array. You can use direct or indirect addressing.

If $$name$$ array is holding $$Sam$$ then the output for your program should look approximately like following:

$$

maS

$$

Logic:

Address$$

Contents

$----------------------------$

$00401000$

$\text{'}$H$\text{'}$

$00401001$

$\text{'}$e$\text{'}$

$00401002$

$\text{'}$l$\text{'}$

$00401003$

$\text{'}$l$\text{'}$

$00401004$

$\text{'}$o$\text{'}$

$00401005$

$0($null terminator$)$

Step $1$: $($Registers and Pointers$)$

$$ Set ESI and EDI to the start of the string $($First character$)$

$$ECX should hold the number of iterations needed for reversal.

$$ Now Update EDI to the end of the string $($Last character$)$

Step$2$: $$Logic to swap

$$ Characters are exchanged between ESI and EDI while moving toward the center of the string.

$$ ESI moves forward, EDI moves backward, and characters are swapped:

$$ Iteration $1$: $\text{'}$H$\text{'}<->\text{'}$o$\text{'}($ESI pointing to H $,$ EDI pointing to $$o$$

$$ Iteration $2$: $\text{'}$e$\text{'}<->\text{'}$l$\text{'}$ and so on$.$

$$ This process continues until the loop completes $($ecx iterations$).$

Step$3$: Write the array after reversing.