Instructions

Describe $($in English$)$ what the instruction does, and identify datapath elements, making sure to

distinguish combinational and sequential elements.

If its not an existing MIPS instruction, determine a suitable machine code format. You want to

choose a format that makes the next step easy $($e$.$g$.,$ to get the proper registers to the right places,

in a way that is compatible with existing instructions$)$; thus you may want to start the next step

first. This reader would need ESP to comprehend your answer otherwise $($i$.$e$.,$no credit if you skip

this step$).$

Add any new datapaths needed. You may also need to add$/$change other hardware elements $($e$.$g$.,$

MUXes$).$ But it is too expensive to add ports to the register file or memories.

Add relevant control signals for any new hardware elements. In some cases, you may be just

modifying an existing control signal $($e$.$g$.,$ changing a $2-$input MUX to a $3-$input MUX, thus changing

the select field from one to two bits$).$

Modify the control path table. Note you need to add a new line for the new instruction, and also

change existing lines if you have modified control signals in the previous step. For this course, I$\text{'}$m

asking you to use mnemonics for the ALUOP field $($add$,$ sub, or func$)$ instead of memorizing the

ALU control bit decoding. step can not be skipped, since a

Assignment

For single and mulitcycle implement push $ sp$,$ that decrements that value of sp by $4$ and stores the result

back into sp$.$ the datapaths and control for single and multicycle are on bb$.$ You must modify the table

for single cycle detailing the control values for the datapaths, and modify the finite state machine for

multicycle adding new states and the control value for each cycle