Commit 8be0d24c authored by Justin Lebar's avatar Justin Lebar Committed by TensorFlower Gardener
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[XLA] Fix edge cases in erfinv implementation. 

We were not handling +/-1 correctly.  Some backends would return the wrong
infinity (i.e. -/+inf rather than +/-inf), while others were returning nan.

Also clean up the tests a tad.

PiperOrigin-RevId: 235271238
parent 932c34f8
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