llvm-project

4190d576 - [APFloat] Add exp function for APFloat::IEEESsingle using expf implementation from LLVM libc. (#143959)

[APFloat] Add exp function for APFloat::IEEESsingle using expf implementation from LLVM libc. (#143959) Discourse RFC: https://discourse.llvm.org/t/rfc-make-clang-builtin-math-functions-constexpr-with-llvm-libc-to-support-c-23-constexpr-math-functions/86450 - The implementation in LLVM libc is header-only. - expf implementation in LLVM libc is correctly rounded for all rounding modes. - LLVM libc implementation will round to the floating point environment's rounding mode. - No cmake build dependency between LLVM and LLVM libc, only requires LLVM libc source presents in llvm-project/libc folder.