JuliaMath / JuliaMath/DoubleFloats.jl

Overflow behaviour of Double64 does not match Float64

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Description

Please re-open this issue:
The root cause seems to be in `DoubleFloats`:

```
julia> Double64(1e300)^2
NaN

julia> Float64(1e300)^2
Inf
```

_Originally posted by @KlausC in https://github.com/JuliaMath/DoubleFloats.jl/issues/149#issuecomment-1133882519_

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