(oops, reposting because used wrong channel for previous message)
Single-file C header for doing 128-bit math operations for msvc/clang/gcc.
Includes full 128-bit signed & unsigned division, handling 128-bit quotient and remainder values.
Compiles to mostly branchless code with msvc & clang.
https://github.com/mmozeiko/overflow/blob/main/x128/x128.h