> the compiler will never emit ... instructions like PSHUFB or PUNPCKxx These are most certainly generated by GCC from C++ code (no intrinsics and such) - can

> the compiler will never emit ... instructions like PSHUFB or PUNPCKxx These are most certainly generated by GCC from C++ code (no intrinsics and such) - can even provide an evidence in the form of a codebase with appropriate build flags. Their use is rather straightforward I think, but still.