[all-commits] [llvm/llvm-project] a3fb30: [mlir][math] Fix polynomial `math.asin` approximat...

[Rob Suderman via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: a3fb30143565cca2c794ab0e9921d50b09cadfc7
      https://github.com/llvm/llvm-project/commit/a3fb30143565cca2c794ab0e9921d50b09cadfc7
  Author: Rob Suderman <rob.suderman at gmail.com>
  Date:   2024-07-31 (Wed, 31 Jul 2024)

  Changed paths:
    M mlir/lib/Dialect/Math/Transforms/PolynomialApproximation.cpp
    M mlir/test/mlir-cpu-runner/math-polynomial-approx.mlir

  Log Message:
  -----------
  [mlir][math] Fix polynomial `math.asin` approximation (#101247)

The polynomial approximation for asin is only good between [-9/16,
9/16]. Values beyond that range must be remapped to achieve good numeric
results. This is done by the equation below:

`arcsin(x) = PI/2 - arcsin(sqrt(1.0 - x*x))`



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