[libc] [llvm] [libc][math] Implement fast pass for double precision atan function. (PR #132333)

[Petr Hosek via llvm-commits]

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@@ -0,0 +1,84 @@
+//===-- Unittests for sin -------------------------------------------------===//
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petrhosek wrote:

```suggestion
//===-- Unittests for atan ------------------------------------------------===//
```

https://github.com/llvm/llvm-project/pull/132333