The libfixmath library is missing unit tests for several key functions, most notably fix16 exp and other…

The libfixmath library is missing unit tests for several key functions, most notably fix16 exp and other…: a task in LegoFlow-SWE (Harbor dataset). All tests must work across multiple compilation variants: with/without 64‑bit support ( FIXMATH NO 64BIT ), with/without rounding ( FIXMATH NO…

The task

All tests must work across multiple compilation variants: with/without 64‑bit support (`FIXMATH_NO_64BIT`), with/without rounding (`FIXMATH_NO_ROUNDING`), with/without overflow protection (`FIXMATH_NO_OVERFLOW`), and with 8‑bit optimization (`FIXMATH_OPTIMIZE_8BIT`).

Part of Lego-X/LegoFlow-SWE.