qfloat16 implemented comparison with int, but not with other integral types. As a result, comparing qfloat16 vs qint64 or short was ambiguous, because the compiler had (at least) two options: * qint64 -> int * qint64 -> float Fix it by explicitly introducing comparison operators for other integral types. Use the new compare helper macros for that, and implement helper methods as templates restricted on integral types. Note that we have to manually extend the std::is_integral type trait because libstdc++ only treats __{u}int128_t types as integral when compiling in -std=gnu++XX mode, and we compile Qt in -std=c++XX mode. Fixes: QTBUG-117637 Change-Id: Id0c074af1e9ccc2c2492eb2cc4ee62a4a7131b07 Reviewed-by: Marc Mutz <marc.mutz@qt.io> Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org> Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>