AES-NI uses the XMM register bank, but not necessarily any vector execution unit. Furthermore, it only uses the lower 128 bits of vector registers, whereas the

AES-NI uses the XMM register bank, but not necessarily any vector execution unit. Furthermore, it only uses the lower 128 bits of vector registers, whereas the linked document is referring to instructions that use the upper lanes as well, i.e. YMM or ZMM registers.