$4\mathrm{.}13$ Examine the difficulty of adding a proposed ss rt$,$ rs$,$ imm $($Store

Sum$)$ instruction to MIPS.

Interpretation: Mem$[$Reg$[$rt$]=$Reg$[$rs$]+$immediate

$4\mathrm{.}13\mathrm{.}1[10]<4\mathrm{.}4>$ Which new functional blocks $($if any$)$ do we need

for this instruction?

$4\mathrm{.}13\mathrm{.}2[10]<4\mathrm{.}4>$ Which existing functional blocks $($ifany$)$ require

modification?

$4\mathrm{.}13\mathrm{.}3[5]<4\mathrm{.}4>$ What new data paths do we need $($if any$)$ to

support this instruction?

$4\mathrm{.}13\mathrm{.}4[5]<4\mathrm{.}4>$ What new signals do we need $($if any$)$ from the

control unit to support this instruction?

$4\mathrm{.}13\mathrm{.}5[5]<4\mathrm{.}4>$ Modify Figure $4\mathrm{.}21$ to demonstrate an

implementation of this new instruction.

$4\mathrm{.}14[5]<4\mathrm{.}4>$ For which instructions $($if any$)$ is the Imm Gen block on

the critical path?