[Piglit] [PATCH] cl: Add tests for mad mix

Jan Vesely jan.vesely at rutgers.edu
Thu Oct 5 21:07:51 UTC 2017

On Thu, 2017-10-05 at 12:39 -0700, Matt Arsenault wrote:
> > On Oct 5, 2017, at 12:33, Jan Vesely <jan.vesely at rutgers.edu> wrote:
> > 
> > 
> > ah, that makes more sense. Do you mind if I add it to the commit
> > message? 

you missed this part. I'd prefer if this purpose of the test was
included in the commit message. Otherwise the text a bit misleadingly
implies that it should also test half conversion.

> > (I'll also fix the formatting nits) with that
> > 
> > Reviewed-by: Jan Vesely <jan.vesely at rutgers.edu>
> > 
> > out of curiosity what's the use of having these in piglit? supposedly
> > the instruction selection and encoding part is tested in llvm lit. Is
> > this testing whether the instruction works correctly? shouldn't the hw
> > design team have tests for that?
> > 
> > Jan
> We can test an encoding in the lit tests, but we can’t actually check
> that it works. I don’t really trust the encoding tests until there’s
> something executing it. A lot of times in the past we’ve gotten the
> encodings wrong and the instruction doesn’t work, or the manual has
> had an off by one error in some of the encodings.

is the plan to add every gfx6+ instruction to piglit for that purpose?
if you have a generator for these tests wouldn't it make sense to
include it in piglit (and maybe drop gcn instruction tests from default


> -Matt
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