[Specs] Need to codify ftint
edge-case behavior in the LoongArch manual
#38
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AREA: Specs
A proper fix would involve updating specification text and likely vendor cooperation
But this patch seems relying on the implicit behavior documented nowhere. The instruction manual only says the ftint instructions satisfy IEEE 754-2008 where these results are unspecified.
We cannot just rely on the Hyrum rule here because the user base of LoongArch is not large enough. We should either avoid relying on the undocumented behavior, or tell the hardware engineers to add this into the specification and keep it in future products.
Originally posted by @xry111 in #36 (comment)
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