[Libre-soc-bugs] [Bug 887] implement fmvis and 2nd-half variant

[bugzilla-daemon at libre-soc.org]

https://bugs.libre-soc.org/show_bug.cgi?id=887

--- Comment #13 from Jacob Lifshay <programmerjake at gmail.com> ---
(In reply to Jacob Lifshay from comment #12)
> actually, fishmv's pseudocode was broken, i added a test demonstrating that
> and fixed it:
> https://git.libre-soc.org/?p=openpower-isa.git;a=commitdiff;
> h=bc5f9cfaa3e3c25bbe11050f04d0556f114ded30

basically, there were no tests with the f32 lsb set, so you didn't notice the
logic being messed up. also, your code was almost certainly broken for denormal
values, since those need both RS's mantissa and the immediate to be variably
shifted.

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