narrowing instructions are never popped from the instruction queue

[moimfeld]

Hi @michael-platzer

Issue

Narrowing instructions, namely vnsrl.(wv|wx|wi), vnsra.(wv|wx|wi) and vnclip(u).(wv|wx|wi), are never popped from the instruction queue in the vproc_core module. This will eventually cause the queue to run full and therefore stall the coprocessor indefinitely. I have not further investigated what exactly causes the instructions to never be popped from the instruction queue.

How to reproduce

You can reproduce this issue by running the cvxif_test_direct_issue_103 in the UVM environment.

[moimfeld]

Additionally, this can also happen for masked vwredsum(u).vs. However, I don't know if the root cause is the same.