[libc-commits] [libc] [libc][math][c23] Add acospif16() function (PR #132754)

[via libc-commits]

amemov wrote:

> @amemov Are you still working on this? The CI build failed due to this error:
> 
> ```
> /var/lib/buildkite-agent/builds/linux-56-59b8f5d88-clshd-1/llvm-project/github-pull-requests/libc/utils/MPFRWrapper/MPCommon.cpp:75:3: error: use of undeclared identifier 'mpfr_acospi'
> ```
> 
> I assume this is once again due to the CI using an older version of MPFR. @lntue

Yes, I working on both issues that are assigned to me in libc - `acospif16` and `rsqrtf16`. 

I almost finished the implementation of acospif16.cpp -- I think I did write the approximations and polynomials right, but had to put it on hold temporarily because of personal circumstances. Still need to test it though on my machine, and to do that I need to do what you mentioned here. 

I will resume the work on it hopefully next week!

https://github.com/llvm/llvm-project/pull/132754