From @zoffixznet

Perl IEEE[^1]​:
1) asinh(-Inf) should return -Inf
2) Any too-large values that don't fit should be an Inf with the correct sign.
3) asinh(-0) gives -0

I fixed[^2] the first issue for num and Num, but not yet sure what the
correct solution is for Complex.
The rest of the issues are still present​:

  <ZoffixW> m​: dd asinh -1e200
  <camelia> rakudo-moar 74d0e3​: OUTPUT«Inf␤» # should be -Inf
  <ZoffixW> m​: dd asinh my num $ = -0e0
  <camelia> rakudo-moar 74d0e3​: OUTPUT«0e0␤» # should be -0e0
  <ZoffixW> m​: dd asinh -0e0
  <camelia> rakudo-moar 74d0e3​: OUTPUT«0e0␤» # should be -0e0
  <ZoffixW> m​: dd asinh -1e200+1i
  <camelia> rakudo-moar 74d0e3​: OUTPUT«<NaN+NaN\i>␤» # Not sure
what it should be; WolframAlpha just gives -Inf, with no indication of
the imaginary part

[1] http://www.csee.umbc.edu/~tsi%E2%80%8Bmo1/CMSC455/IEEE-754-2008.pdf
[2]
rakudo/rakudo@74d0e36

From @zoffixznet

Corrected IEEE link http://www.csee.umbc.edu/~tsimo1/CMSC455/IEEE-754-2008.pdf
Relevant info are in sections 7 and 9. Try searching for asinh

From @zoffixznet

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TODO-fudged tests added as part of Raku/roast@6c31fe31ab

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