By ChatGPT using GPT-4

frexp_min.ex

# "please implement the frexp function in elixir, and minify it as much as possible"
defmodule Decode do
  use Bitwise
  @b 1022
  def frexp(v), do: <<s::1, e::11, f::52>> = <<v::float>>; frexp(s, f, e)
  defp frexp(_, 0, 0), do: {0.0, 0}
  defp frexp(s, f, 0), do: exp = bl(f); <<r::float>> = <<s::1, @b::11, (f-1)::52>>; {r, -(@b) - 52 + exp}
  defp frexp(s, f, e), do: <<r::float>> = <<s::1, @b::11, f::52>>; {r, e - @b}
  def bl(v), do: bl(v, 0)
  defp bl(0, n), do: n
  defp bl(v, n), do: bl(bsr(v, 1), n+1)
end