Single stepping through hwloop does not work

[bluewww]

Single stepping through hardware loops doesn't work.

Steps to Reproduce

1. git hash 6c858bc (master)

Unfortunately, I don't have a minimized reproducible example at hand, but it was reported to me that single stepping via openocd through hwloops doesn't work.

Also, back then when I implemented the states for riscv debug module support, I didn't invest any resources to add the special handling probably required for hwloops.

Does steps to make a reproducer are probably roughly like this:

1. write program containing hwloops in asm (or in c)
2. run it in testbench setup with the debug module that allows for interaction with openocd such as the riscv-dbg testbench (core-v-verif used to have such a testbench too but it was removed)
3. do the single stepping over gdb -> openocd -> simulated testbench.

[MikeOpenHWGroup]

Hello @bluewww, it has been a very long time and I know this is a long shot, but are you in a position to replicate this issue? At this point the HWLOOP feature has been extensively verified and there are no known RTL issues related to this feature.