Adhemerval Zanella Netto
I work at Linaro.org as Toolchain Engineer, and I am a glibc maintainer.
Session
The glibc math library aims to provide the required functions and macros from C standard math.h and related headers (fenv.h, float.h, and complex.h). The glibc supports multiple architectures and floating-point types, and also provides vectorized routines for some architectures. The math library is actively working to support newer extensions and features.
On this, I will demonstrate the recent optimization of multiple parts of the math libraries, explaining how we achieve it by utilizing new algorithms adapted for new hardware, as well as by leveraging external projects with improved implementations. I will also present recent work that supports the newer C23 functions and outline possible future work for optimizations.
Also, I will talk and ask about future extensions and what to focus on. Should we aim to provide implementation with better precision, and what is the expected tradeoff between performance and precision? Should we extend the support for newer types, for instance, float16_t? And what about decimal floating point support? Should we add a platform neutral skeleton vector math library to be used by other archictures?