[libc-commits] [libc] [libc][stdfix] Initial support for stdfix.h and fixed point arithmetic. (PR #81201)

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lntue wrote:

Spinoff 4:  Add support for fixed point types in the testing infrastructure. #81819 
Spinoff 5: Add abs functions for signed fixed point types. #81823

https://github.com/llvm/llvm-project/pull/81201