[Mlir-commits] [mlir] [MLIR][Math] Add erfc to math dialect (PR #126439)

[Benoit Jacob]

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@@ -1118,6 +1122,101 @@ ErfPolynomialApproximation::matchAndRewrite(math::ErfOp op,
   return success();
 }
 
+// Approximates erfc(x) with p((x - 2) / (x + 2)), where p is a 9 degree
+// polynomial.This approximation is based on the following stackoverflow post:
+// https://stackoverflow.com/questions/35966695/vectorizable-implementation-of-complementary-error-function-erfcf
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bjacob wrote:

The SO post itself mentions the reference that this comes from. I think it would be worth mentioning here along with the SO post.

https://github.com/llvm/llvm-project/pull/126439