For the whole assignment, pseudo$-$instructions are not allowed except $"j$ target$\_$label" and $"$jr ra$".$ One suggestion for assembly programming problems is that you can include comments to one or a block of instructions.

Section I: Problems

$(30$ Points$)$ Write a RISC$-$V assembly function to search a specified integer in an integer array. The function should take the base address of the array, the number of elements in the array, and the specified integer as function arguments. The function should return the index number of the first array entry that holds the specified value. If no array element is the specified value, it should return the value $-1.$

$(15$ points$)$ Consider a RISC$-$V assembly function func$1.$ func$1$ has three passing arguments stored in registers $a0,a1$ and a$2,$ uses temporary registers $t0-t3$ and saved registers $s4-s10.$ func$1$ needs to call func$2$ and other functions may call func$1$ also. func$2$ has two passing arguments stored in registers $a0$ and $a1,$ respectively. In func$1,$ after the program returns to func$1$ from func$2,$ the code needs the original values stored in registers $t1$ and $a0$ before it calls func $2.$

$($a$)$ How many words are the stack frames of function func$1?$

$($b$)$ Indicate which registers are stored on the stack of func$1.$