Need help with ALU design instructions

[esmeco]

Homework Statement

Hello!

I need to implement a "branch if greater than or equal" and a "set if less than" in my 16-bit ALU (MIPS architecture),but I'm having some difficulties with it.

Homework Equations

The "set if less than" I think,if one considers overflow,it could be implemented XOR-ing the signal bit with the overflow and then,connecting it to the less input (setting all less bits less the LSB to 0) of ALU 0,right?

The Attempt at a Solution

The "branch if greater than or equal" is what giving me some troubles.
I know that a "branch if greater than or equal" is a pseudo-instruction that can be done as a slt and a beq.
But how do I mplement that in my ALU?If the slt above mentioned is correct and considering I also have designed a beq(NOR dos bits do resultado),how do I put these 2 together in order to create a bge?

Thanks in advance for all the help!

 

[esmeco]

I really need some help on this!

 

[Mene]

Hello, it sounds like you are trying to implement a "branch if greater than or equal" and "set if less than" instructions in your 16-bit ALU for MIPS architecture. This can be a challenging task, but I can offer some guidance to help you with your design.

For the "set if less than" instruction, you are on the right track with using XOR to compare the signal bit with the overflow. However, you will also need to consider the other input bits and how they affect the result. Additionally, you may want to consider how the output of this instruction will be used in other parts of your ALU design.

As for the "branch if greater than or equal" instruction, it can be implemented using a combination of the slt (set less than) and beq (branch if equal) instructions. You will need to carefully consider the inputs and outputs of these instructions and how they can be combined to achieve the desired result.

I suggest breaking down these instructions into smaller components and testing them individually before trying to integrate them into your ALU design. This will help you identify any potential issues and make troubleshooting easier. Additionally, you may want to consult your textbook or online resources for examples and guidance on implementing these instructions in an ALU.

I hope this helps and good luck with your ALU design!