SOLVE Example $6\mathrm{.}8,$ Question $2$ AND EX:$6$:$21$:

Textbook Problems:

Example $6\mathrm{.}8$:

$1-$ Rewrite the subroutine $"$MY$\_$SUB" by using PUSH and POP instructions instead of STR and

LDR instructions when accessing the stack memory.

$2-$ Deduce how many write and read to$/$from the stack memory are there in the subroutine

$"$MY$\_$SUB"

Example $6\mathrm{.}21$:

It is the same example, but to calculate the square root of $x,$ where $x$ has a value of $100$ to $108.$

Store the integer part in Register R$1$ and the decimal part in Register R$2(4$ digits only$).$

For instance for $x=80,$ sqrt $(x)=8\mathrm{.}9943.$ Then $R1=8$ and $R2=9943.$