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float1.py

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    • Damien George's avatar
      d4b75f6b
      py/obj: Fix comparison of float/complex NaN with itself. · d4b75f6b
      Damien George authored 
      IEEE floating point is specified such that a comparison of NaN with itself
returns false, and Python respects these semantics.  This patch makes uPy
also have these semantics.  The fix has a minor impact on the speed of the
object-equality fast-path, but that seems to be unavoidable and it's much
more important to have correct behaviour (especially in this case where
the wrong answer for nan==nan is silently returned).
      d4b75f6b
      History
      py/obj: Fix comparison of float/complex NaN with itself.
      Damien George authored 
      IEEE floating point is specified such that a comparison of NaN with itself
returns false, and Python respects these semantics.  This patch makes uPy
also have these semantics.  The fix has a minor impact on the speed of the
object-equality fast-path, but that seems to be unavoidable and it's much
more important to have correct behaviour (especially in this case where
the wrong answer for nan==nan is silently returned).