https://github.com/AmaanC/v86/commits/mmx-instructions
- emms
- movd
- movq
- packssdw
- packsswb
- packuswb
- paddb
- paddd
- paddsb
- paddsw
- paddusb
- paddusw
- paddw
- pand
- pandn
- pcmpeqb
- pcmpeqd
- pcmpeqw
- pcmpgtb
- pcmpgtd
- pcmpgtw
- pmaddwd
- pmulhw
- pmullw
- pshufw
- por
- pslld
- psllq
- psllw
- psrad
- psraw
- psrld
- psrlq
- psrlw
- psubb
- psubd
- psubsb
- psubsw
- psubusb
- psubusw
- psubw
- punpckhbw
- punpckhdq
- punpckhwd
- punpcklbw
- punpckldq
- punpcklwd
(Several such as movd, movq, psrlw, etc. have multiple instruction encodings)