$3.$ The MIPS addu instruction performs the same operation as the MIPS add instruction. The only

difference is that after the sum is produced, add triggers an exception if a signed overflow

occurs, while addu does not trigger an exception. Both addu and add treat the contents of

registers as two$$s complement numbers and both perform signed addition.

a$)(3)$ Assume that register $$5$ contains $-579$ and register $$6$ contains $+107896.$ Show, in hex, the

$32-$bit result produced by the instruction addu $$4,$ $$5,$ $$6.$

Contents of $$4=0$x$\_\_\_\_\_\_\_\_\_\_\_\_\_$

Is this the correct sum? Explain your answer.

b$)(3)$ Assume that register $$5$ contains $0$x$7$FFFFFFE and register $$6$ contains $0$x$1045.$ Show, in

hex, the $32-$bit result produced by the instruction addu $$4,$ $$5,$ $$6.$

Contents of $$4=0$x$\_\_\_\_\_\_\_\_\_\_\_\_\_$

Is this the correct sum? Explain your answer.

c$)(3)$ Assume that register $$5$ contains $2147418112$ and register $$6$ contains $524287.$ Show, in

hex, the $32-$bit result produced by the instruction addu $$4,$ $$5,$ $$6.$

Contents of $$4=0$x$\_\_\_\_\_\_\_\_\_\_\_\_\_$

Is this the correct sum? Explain your answer.