Extending MIPS32 datapath help

[esmeco]

Hello!
I'm having problems figuring out how to extend the datapath and the blocks used for ble and sgt instructions on MIPS32.
After studying a bit I managed to code the instructions for ble and sgt respectively:

slt $t0, $s2, $s1
beq $t0, $zero, less_equal
////////////////////////////
slt $t0, $s2, $s1

Any tips on how to extend MIPS datapath to support ble and slt instructions would be very helpful!

 

[esmeco]

Any help is really appreciated!

 

[quicknote]

Hello there,

Extending the MIPS32 datapath to support ble and sgt instructions can be achieved by adding new blocks and modifying existing ones. Firstly, you will need to add a new comparison unit that can handle both ble and sgt instructions. This unit will take in the two operands, $s1 and $s2, and perform the comparison using the slt instruction. The output of this unit will then be fed into a new branch control unit, which will determine whether the branch should be taken or not based on the result of the comparison.

Next, you will need to modify the existing branch control unit to support the new ble and sgt instructions. This unit will take in the output of the comparison unit and generate the appropriate signals to control the multiplexer that selects the next instruction to be executed.

In addition, you may also need to add new multiplexers and control signals to the datapath to support the new instructions. For example, you may need to add a new multiplexer to select the result of the comparison unit as the input to the branch control unit, instead of the slt instruction's output.

I hope these tips will help you in extending the MIPS32 datapath. Remember to carefully consider the timing and control signals for each new block you add, and to test your modifications thoroughly to ensure proper functionality. Good luck!