Add: Basic RAW hazard detection in decoder#2381
Closed
Anubhav-30 wants to merge 1 commit intolowRISC:masterfrom
Closed
Add: Basic RAW hazard detection in decoder#2381Anubhav-30 wants to merge 1 commit intolowRISC:masterfrom
Anubhav-30 wants to merge 1 commit intolowRISC:masterfrom
Conversation
Contributor
|
The proposed logic only checks whether a single instruction reads and writes to the same register. Ibex already handles RAW hazards. Furthermore, this PR introduces syntax errors. Please ensure all future contributions pass basic tests. We are closing this PR as the proposed changes do not align with our current development priorities, address any tracked issues, or meet our required technical standards. |
This was referenced Apr 17, 2026
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
This PR introduces a simple RAW (Read After Write) hazard detection
mechanism in the decoder.
The added logic detects when the current instruction reads a register
that is also being written, which can lead to incorrect data usage
in pipelined execution.
Currently, this change only exposes a hazard_detected_o signal and
does not implement stalling or forwarding. This provides a clean
foundation for future pipeline hazard handling.
This improves pipeline awareness and aligns with standard CPU
design practices.