Problem $5.(9$ points$)$ Synchronization

Load$-$reserved $($LR$)$ and store conditional $($SC$)$ instructions can be used to implement atomic memory

operations in RISC$-$V$.$ Their usage and description are given below:

Fill in the lines below to implement compare$-$and$-$swap function. Compare$-$and$-$swap function

compares the value at a memory location with an expected value and if they are equal, swap the value

at the memory location with the desired value. The function returns a zero on success or a value of $1$

on failure.

$\frac{?}{\text{b}\text{a}\text{r}}($ jalr $x0,0(x1))$