Commit 414ca1cd authored by Benjamin Kramer's avatar Benjamin Kramer Committed by TensorFlower Gardener
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[XLA:CPU] Add an emitter for erfinv(double) and erfinv(half). 

This is used by the random number generator. Same algorithm as for float, just with more
precision. fp16 is upcasted to fp32 and then processed with the float algorithm.

PiperOrigin-RevId: 213648736
parent 0800a645
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