[libc-commits] [libc] [llvm] [libc][math][c23] Add rsqrtf() function (PR #159615)

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+//===-- Utility class to test rsqrt[f|l] ------------------------*- C++ -*-===//
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overmighty wrote:

Nit:

```suggestion
//===-- Utility class to test different flavors of rsqrt --------*- C++ -*-===//
```

https://github.com/llvm/llvm-project/pull/159615