[Libre-soc-bugs] [Bug 541] implement nmigen HDL IEEE754 and Khronos FP transcendentals needed for 3D (CORDIC ones)

[bugzilla-daemon at libre-soc.org]

https://bugs.libre-soc.org/show_bug.cgi?id=541

--- Comment #4 from Jacob Lifshay <programmerjake at gmail.com> ---
(In reply to Luke Kenneth Casson Leighton from comment #3)
> my initial thoughts are to give users control over the accuracy level in
> some way.  some developers clearly want high accuracy, others will want
> speed.

https://libre-soc.org/irclog/%23libre-soc.2021-05-09.log.html#t2021-05-09T21:03:59

ok, except iirc the programs that run on amd gpus (which have the highest
accuracy) aren't any different (they don't have an option saying give me
high/low accuracy) than the ones that run on e.g. intel gpus (lowest accuracy
out of amd, nvidia, intel), so having options is fine but we'd have to always
just pick the high accuracy one to meet developer expectations who are used to
gpus that greatly exceed khronos's junk-tier minimum requirements

meaning it takes extra silicon to implement the low-accuracy variant that we
can't use anyway

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