Program in RISC$-$V$.$ Please ensure the code works in the venus web terminal. In the venus web terminal, sys call code for printing is $1.$For printing in hex, it's $34.$

Strategy:

$1.$ Check if the addition produces an overflow

a$.$ Overflow just happens when a and b have the same polarity. You can use SLU to set two rds by comparing a to $0$ and b to $0.$ Xor two rds$.$ If they are the same, the xor should return a $0,$ meaning a and b have the same polarity.

b$.$ If the sum does not have the same polarity with a and b$,$ then overflow occurs.

$2.$ Once overflows, the sum will be wrong. We need to convert it to a right hex representation in $2$s complement.

a$.$ If the wrong sum is $+$ve$,$ extend $32$ bits of $1$s and put them into an extra register to make the sum as $32$bits $+32$ bits long.

b$.$ If the wrong sum is in $-$ve$,$ extend $31$ bits of $0$s and $1$ bit of $1$ and put them into an extra register. The highest bit of the sum register should be turned to $0.$ These two registers make the sum as $32$bits $+32$bits long.

$3.$ Print both of the two registers in hex $$