Question $1(20$ point$)$: For the single cycle datapath figure shown in page $2,$ write the state$/$values $($in hex or binary$)$ of the control signals at the end of a cycle when the following instructions execute. Assume that the instructions are executing in a sequence with $\backslash (\backslash$mathrm$\{$PC$\}=0\backslash )$ for the first instruction. Elaborate your calculation as much as possible for partial credits. Assumptions:

Assume,

$-\backslash$$t$0\backslash (=0\backslash$times $0000\backslash )$ FFFF$,$

$-\backslash$$t$1=0$x$0000\_$FFFF$,$

$-\backslash$$t$2\backslash (=0$ x $0000\backslash \_$F F F F $\backslash ),$

$-\backslash$$s$2=0$x$0000\_00$FF$,$

$-\backslash$$s$3=0$x$0000\_0004.$

$-$ Initial value of all signal and memory state is zero unless changed by earlier instructions. The first instruction has been given as an example $($all are in binary$).$

Write your answers here.

$\backslash (\backslash$square $\backslash )$ Instruction RegDST Branch MemRead MemtoReg ALUOp ALUSrc RegWrite

add $\backslash$$t$2,\backslash$$t$2,\backslash$$s$21$

$0$

$0$

$0$

$10$

$0$

$1$

lw $\backslash$$t$1,0$x$4(\backslash$$s$3)$

sub $\backslash$$t$1,\backslash$$t$1,\backslash$$s$2$

beq $\backslash (\backslash$$ $\backslash$mathrm$\{$t$\}0,\backslash$$ $\backslash$mathrm$\{$tt$\},0\backslash$mathrm$\{$x$\}8\backslash )$

j $0$xFF