[CamperBob2]

Yeah, that's absurd. It's like asking for C intrinsics to be implemented as functions.

Those primitives are just a way to force the synthesis tool to infer specific hardware features.

[duskwuff]

In the case of some of these primitives, like I/OSERDES -- high-speed input/output de/serializers -- they can't even be inferred. The only way you'll get one is if you specifically ask for it.