[libc-commits] [libc] [libc][math][c23] implement C23 math function asinpif16 (PR #146226)

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overmighty wrote:

The MPFR/exhaustive test (`libc.test.src.math.asinpif16_test.__unit__`) is failing on my machine. There are 47 inputs for which  the result has a ULP error of 1 in one or more rounding modes.

https://github.com/llvm/llvm-project/pull/146226