avx-512dq adds new doubleword and quadword instructions. avx-512bw adds byte and words versions of the same instructions, and adds byte and word version of doubleword/quadword instructions in avx-512f. a few instructions which get only word forms with avx-512bw acquire byte forms with the avx-512_vbmi extension (codice_3, codice_4, codice_5, codice_6).