# Bringing Correctly Rounded Math to Production with LLVM-libc

DevFeed: [Bringing Correctly Rounded Math to Production with LLVM-libc](<https://devfeed.tech/articles/bringing-correctly-rounded-math-to-production-with-llvm-libc-31548.md>)

Original publisher: [Read original article](<https://devblogs.microsoft.com/cppblog/bringing-correctly-rounded-math-to-production-with-llvm-libc/>)

Author: Cody Miller, Tue Ly, Michael Jones

Published: 2026-09-16T22:09:50Z

Content type: article

Language: en

Sources: [C++ Team Blog](<https://devfeed.tech/sources/c-team-blog.md>)

Topics: [LLVM](<https://devfeed.tech/topics/llvm.md>), [Support](<https://devfeed.tech/topics/support.md>), [C++](<https://devfeed.tech/topics/c-plus-plus.md>)

Tags: [c-plus-plus](<https://devfeed.tech/tags/c-plus-plus.md>), [compiler](<https://devfeed.tech/tags/compiler.md>), [llvm](<https://devfeed.tech/tags/llvm.md>), [msvc](<https://devfeed.tech/tags/msvc.md>)

## AI overview

This guest post explains LLVM-libc's design philosophy of portability and modularity, and discusses its math functions, including their use by MSVC for compile-time evaluation and runtime execution when /Zc:cmath is enabled.

## Source excerpt

As we mentioned in the last cmath blog post, MSVC is using LLVM-libc for compile-time evaluation and runtime execution of math functions when /Zc:cmath is enabled. I invited LLVM-libc contributors Michael Jones and Tue Ly to write a guest blog post about how they've achieved what they've achieved. This is that blog post! I hope [...] The post Bringing Correctly Rounded Math to Production with LLVM-libc appeared first on C++ Team Blog.