[libc-commits] [libc] [libc][math][c23] Add exp10m1f C23 math function (PR #87992)

[via libc-commits]

overmighty wrote:

UBSan throws an error when running `libc.test.src.math.exp10m1f_test.__unit__`:

```
/home/overmighty/projects/llvm-project/libc/src/math/generic/explogxf.h:164:20: runtime error: left shift of negative value -25
```

https://github.com/llvm/llvm-project/pull/87992