Uriel assignment05

[urielguerrero07]

Hey Umer

Quick update on Assignment 05. I already pushed it, made a new branch uriel-assignment05 and opened a pull request so you can review when you have time.

I added support for the branch and jump instructions: BEQ, BNE, BLT, BGE, BLTU, BGEU, JAL and JALR. I followed the static branch prediction approach the professor suggested (assume branches as not taken, flush the pipeline if they turn out taken, jumps always taken).

The main changes were:

• common.scala → added the new uop codes for branches and jumps
• IDstage.scala → decoding for B-type and J-type, plus the new immediates (B-type and J-type formats)
• IDbarrier.scala → carries PC, immediate and flush signal
• EXstage.scala → branch condition evaluation + branch/jump target calculation
• IFstage.scala → updated PC logic to handle the branch target
• IFbarrier.scala → flush logic to clear wrong fetched instructions to NOP
• core.scala → connected the branch feedback path from EX back to IF

Everything compiles and sbt test passes.

On the testbench side I did some basic test cases for the branches and jumps, but to be honest I'm not super confident with that part since I'm still getting used to the RISC-V encoding side of things. If you could review the test cases and maybe add more coverage I'd really appreciate it, you handle that part better than me.

Please check the PR when you can. I pushed this now to help you out and not put extra load on you so we can present before Friday since I can't make it that day.

Thanks bro