Write a RISC$-$V OTTER assembly language subroutine that reformats a section of memory and does some outputting as necessary. The start of the section of memory is passed to the subroutine in x$25$ and contains unsigned halfwords. If a given halfword is non$-$zero, that halfword is written to port address $0$x$1100$F$000$; the data at that address is then cleared $($written with a zero$).$ This reformatting ends after the subroutine encounters $40$ non$-$zero values. The subroutine passes back the number of halfwords examined in x$31.$

Minimize the number of instructions in your program

Comment your code appropriately

Don't permanently change any register other than x$31$