#9370: Workaround: replace WRCFG with RMWCIB instructions in reduce_revert_delta

[amahmudTT]

9370

Link to Github Issue

Problem description

The Unpacker uses stale value for address for SrcB even though it is written. It seems to be colliding with WRCFG instructions used in the reduce_revert_delta function. We kept the timing the same and replaced WRCFG instructions with RMWCIB instructions to do the bare minimum and the problem goes away.

What's changed

The workaround uses RMWCIB instructions in the reduce_revert_delta function for wh_b0. It does not have the same timing and consumes more cycles but is functionally the same as what was in the original function.

Checklist

• Post commit CI passes
• Blackhole Post commit (if applicable)
• Model regression CI testing passes (if applicable)
• Device performance regression CI testing passes (if applicable)
• New/Existing tests provide coverage for changes