[libre-riscv-dev] [Bug 325] create POWER9 TRAP pipeline

[bugzilla-daemon at libre-soc.org]

https://bugs.libre-soc.org/show_bug.cgi?id=325

--- Comment #84 from Cole Poirier <colepoirier at gmail.com> ---
(In reply to Luke Kenneth Casson Leighton from comment #82)
> (In reply to Cole Poirier from comment #79)
> > (In reply to Luke Kenneth Casson Leighton from comment #75)
> 
> > > the normal solution for this is to "call in" something that *is* known,
> > > and that would be the qemu emulator.  except we kinda need some help from
> > > michael to do that in a short timescale, or we need to investigate it
> > > in a longer one.  given that there's a critical task needed (investigating
> > > the CR bit-ordering) i'd rather we not pull him off of that.
> > 
> > So until we have the known qemu emulator I should just try writing
> > appropriate unit tests for when we have the emulator working? Should I raise
> > a bug report for investigating the qemu powerpc emulator on a longer
> > timescale?
> 
> yes please.
> 
> > What should I say in the bug description?
> 
> that we need one example unit test of how to run some assembly code
> "qemu vs simulator" rather than "qemu vs hardware"
> 
> or, even just "qemu with some asserts" but looking *exactly* like how
> it's done in the simulator, right now.
> 
> and that ultimately it should be possible to have a runtime switch
> (or a suite of tests) that allow us to verify *aaalll* the simulator
> test_pipe_caller.py tests, in the following way:
> 
> * simulator vs qemu
> * qemu vs hardware
> * hardware vs simulator
> 
> later i would very much like to be able to add microwatt to that list.

Done https://bugs.libre-soc.org/show_bug.cgi?id=368

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