[Libre-soc-isa] [Bug 1092] OPF RFC ISA WG questions feedback on ls002 float-load-immediate

bugzilla-daemon at libre-soc.org bugzilla-daemon at libre-soc.org
Wed May 31 22:15:50 BST 2023


Jacob Lifshay <programmerjake at gmail.com> changed:

           What    |Removed                     |Added
                 CC|                            |programmerjake at gmail.com

--- Comment #6 from Jacob Lifshay <programmerjake at gmail.com> ---
(In reply to Konstantinos Margaritis (markos) from comment #4)
> > Are you OK with fishmv generating some result which is very different from the input value
> > in this kind of case? (If so, a programming note warning about the possibility is probably
> > appropriate.)

yes, fishmv is intended to be used only with f32 values (or more specifically,
all possible results of fmvis which is a subset of f32 values), if it isn't a
valid f32-in-f64 then i'm fine with values changing because behaving like a
bfp32 store/write 16-bits/bfp32 load is exactly what's intended.

> IMHO, the result should not be different from the input value.

i explained the misunderstanding in the meeting today, konstantinos was worried
it would give different values than encoded in the immediates of a fmvis/fishmv
pair, but it doesn't do that, it correctly handles all possible f32

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