x86 architecture 3 byte opcodes note: AMD abandoned DREX in favor of SSE4.1, AVX (for COMcc[PS|PD|SS|SD]), AVX2 (for PERM[PS|PD]), FMA4, F16C, and XOP -- so DREX never shipped pre- fix & OC0 0Fh 24h xxh   x0h   x1h x2h x3h x4h x5h x6h x7h n/a   OC0 =0 0xh FMADDPS VDo,VDo,Vo,Wo (SSE5A) FMADDPD VDo,VDo,Vo,Wo (SSE5A) FMADDSS VDd,VDd,Vd,Wd (SSE5A) FMADDSD VDq,VDq,Vq,Wq (SSE5A) FMADDPS VDo,Vo,Wo,VDo (SSE5A) FMADDPD VDo,Vo,Wo,VDo (SSE5A) FMADDSS VDd,Vd,Wd,VDd (SSE5A) FMADDSD VDq,Vq,Wq,VDq (SSE5A) n/a   OC0 =1 FMADDPS VDo,VDo,Wo,Vo (SSE5A) FMADDPD VDo,VDo,Wo,Vo (SSE5A) FMADDSS VDd,VDd,Wd,Vd (SSE5A) FMADDSD VDq,VDq,Wq,Vq (SSE5A) FMADDPS VDo,Wo,Vo,VDo (SSE5A) FMADDPD VDo,Wo,Vo,VDo (SSE5A) FMADDSS VDd,Wd,Vd,VDd (SSE5A) FMADDSD VDq,Wq,Vq,VDq (SSE5A) n/a   OC0 =0 1xh FNMADDPS VDo,VDo,Vo,Wo (SSE5A) FNMADDPD VDo,VDo,Vo,Wo (SSE5A) FNMADDSS VDd,VDd,Vd,Wd (SSE5A) FNMADDSD VDq,VDq,Vq,Wq (SSE5A) FNMADDPS VDo,Vo,Wo,VDo (SSE5A) FNMADDPD VDo,Vo,Wo,VDo (SSE5A) FNMADDSS VDd,Vd,Wd,VDd (SSE5A) FNMADDSD VDq,Vq,Wq,VDq (SSE5A) n/a   OC0 =1 FNMADDPS VDo,VDo,Wo,Vo (SSE5A) FNMADDPD VDo,VDo,Wo,Vo (SSE5A) FNMADDSS VDd,VDd,Wd,Vd (SSE5A) FNMADDSD VDq,VDq,Wq,Vq (SSE5A) FNMADDPS VDo,Wo,Vo,VDo (SSE5A) FNMADDPD VDo,Wo,Vo,VDo (SSE5A) FNMADDSS VDd,Wd,Vd,VDd (SSE5A) FNMADDSD VDq,Wq,Vq,VDq (SSE5A) n/a   OC0 =0 2xh PERMPS VDo,VDo,Vo,Wo (SSE5A) PERMPD VDo,VDo,Vo,Wo (SSE5A) PCMOV VDo,VDo,Vo,Wo (SSE5A) PPERM VDo,VDo,Vo,Wo (SSE5A) PERMPS VDo,Vo,Wo,VDo (SSE5A) PERMPD VDo,Vo,Wo,VDo (SSE5A) PCMOV VDo,Vo,Wo,VDo (SSE5A) PPERM VDo,Vo,Wo,VDo (SSE5A) n/a   OC0 =1 PERMPS VDo,VDo,Wo,Vo (SSE5A) PERMPD VDo,VDo,Wo,Vo (SSE5A) PCMOV VDo,VDo,Wo,Vo (SSE5A) PPERM VDo,VDo,Wo,Vo (SSE5A) PERMPS VDo,Wo,Vo,VDo (SSE5A) PERMPS VDo,Wo,Vo,VDo (SSE5A) PCMOV VDo,Wo,Vo,VDo (SSE5A) PPERM VDo,Wo,Vo,VDo (SSE5A) n/a   OC0 =0 3xh n/a   OC0 =1 n/a   OC0 =0 4xh PROTB VDo,Vo,Wo (SSE5A) PROTW VDo,Vo,Wo (SSE5A) PROTD VDo,Vo,Wo (SSE5A) PROTQ VDo,Vo,Wo (SSE5A) PSHLB VDo,Vo,Wo (SSE5A) PSHLW VDo,Vo,Wo (SSE5A) PSHLD VDo,Vo,Wo (SSE5A) PSHLQ VDo,Vo,Wo (SSE5A) n/a   OC0 =1 PROTB VDo,Wo,Vo (SSE5A) PROTW VDo,Wo,Vo (SSE5A) PROTD VDo,Wo,Vo (SSE5A) PROTQ VDo,Wo,Vo (SSE5A) PSHLB VDo,Wo,Vo (SSE5A) PSHLW VDo,Wo,Vo (SSE5A) PSHLD VDo,Wo,Vo (SSE5A) PSHLQ VDo,Wo,Vo (SSE5A) n/a   OC0 =0 8xh PMACSSWW VDo,Vo,Wo,VDo (SSE5A) PMACSSWD VDo,Vo,Wo,VDo (SSE5A) PMACSSDQL VDo,Vo,Wo,VDo (SSE5A) n/a   OC0 =0 9xh PMACSWW VDo,Vo,Wo,VDo (SSE5A) PMACSWD VDo,Vo,Wo,VDo (SSE5A) PMACSDQL VDo,Vo,Wo,VDo (SSE5A) n/a   OC0 =0 Axh PMADCSSWD VDo,Vo,Wo,VDo (SSE5A) n/a   OC0 =0 Bxh PMADCSWD VDo,Vo,Wo,VDo (SSE5A) pre- fix & OC0 0Fh 24h xxh   x8h   x9h xAh xBh xCh xDh xEh xFh n/a   OC0 =0 0xh FMSUBPS VDo,VDo,Vo,Wo (SSE5A) FMSUBPD VDo,VDo,Vo,Wo (SSE5A) FMSUBSS VDd,VDd,Vd,Wd (SSE5A) FMSUBSD VDq,VDq,Vq,Wq (SSE5A) FMSUBPS VDo,Vo,Wo,VDo (SSE5A) FMSUBPD VDo,Vo,Wo,VDo (SSE5A) FMSUBSS VDd,Vd,Wd,VDd (SSE5A) FMSUBSD VDq,Vq,Wq,VDq (SSE5A) n/a   OC0 =1 FMSUBPS VDo,VDo,Wo,Vo (SSE5A) FMSUBPD VDo,VDo,Wo,Vo (SSE5A) FMSUBSS VDd,VDd,Wd,Vd (SSE5A) FMSUBSD VDq,VDq,Wq,Vq (SSE5A) FMSUBPS VDo,Wo,Vo,VDo (SSE5A) FMSUBPD VDo,Wo,Vo,VDo (SSE5A) FMSUBSS VDd,Wd,Vd,VDd (SSE5A) FMSUBSD VDq,Wq,Vq,VDq (SSE5A) n/a   OC0 =0 1xh FNMSUBPS VDo,VDo,Vo,Wo (SSE5A) FNMSUBPD VDo,VDo,Vo,Wo (SSE5A) FNMSUBSS VDd,VDd,Vd,Wd (SSE5A) FNMSUBSD VDq,VDq,Vq,Wq (SSE5A) FNMSUBPS VDo,Vo,Wo,VDo (SSE5A) FNMSUBPD VDo,Vo,Wo,VDo (SSE5A) FNMSUBSS VDd,Vd,Wd,VDd (SSE5A) FNMSUBSD VDq,Vq,Wq,VDq (SSE5A) n/a   OC0 =1 FNMSUBPS VDo,VDo,Wo,Vo (SSE5A) FNMSUBPD VDo,VDo,Wo,Vo (SSE5A) FNMSUBSS VDd,VDd,Wd,Vd (SSE5A) FNMSUBSD VDq,VDq,Wq,Vq (SSE5A) FNMSUBPS VDo,Wo,Vo,VDo (SSE5A) FNMSUBPD VDo,Wo,Vo,VDo (SSE5A) FNMSUBSS VDd,Wd,Vd,VDd (SSE5A) FNMSUBSD VDq,Wq,Vq,VDq (SSE5A) n/a   OC0 =0 2xh n/a   OC0 =1 n/a   OC0 =0 3xh n/a   OC0 =1 n/a   OC0 =0 4xh PSHAB VDo,Vo,Wo (SSE5A) PSHAW VDo,Vo,Wo (SSE5A) PSHAD VDo,Vo,Wo (SSE5A) PSHAQ VDo,Vo,Wo (SSE5A) n/a   OC0 =1 PSHAB VDo,Wo,Vo (SSE5A) PSHAW VDo,Wo,Vo (SSE5A) PSHAD VDo,Wo,Vo (SSE5A) PSHAQ VDo,Wo,Vo (SSE5A) n/a   OC0 =0 8xh PMACSSDD VDo,Vo,Wo,VDo (SSE5A) PMACSSDQH VDo,Vo,Wo,VDo (SSE5A) n/a   OC0 =0 9xh PMACSDD VDo,Vo,Wo,VDo (SSE5A) PMACSDQH VDo,Vo,Wo,VDo (SSE5A) n/a   OC0 =0 Axh n/a   OC0 =0 Bxh pre- fix & OC0 0Fh 25h xxh   x8h   x9h xAh xBh xCh xDh xEh xFh n/a   OC0 =0 2xh COMccPS #1 VDo,Vo,Wo,Ib (SSE5A) COMccPD #1 VDo,Vo,Wo,Ib (SSE5A) COMccSS #1 VDd,Vd,Wd,Ib (SSE5A) COMccSD #1 VDq,Vq,Wq,Ib (SSE5A) n/a   OC0 =0 4xh PCOMccB #2 VDo,Vo,Wo,Ib (SSE5A) PCOMccW #2 VDo,Vo,Wo,Ib (SSE5A) PCOMccD #2 VDo,Vo,Wo,Ib (SSE5A) PCOMccQ #2 VDo,Vo,Wo,Ib (SSE5A) n/a   OC0 =0 6xh PCOMccUB #2 VDo,Vo,Wo,Ib (SSE5A) PCOMccUW #2 VDo,Vo,Wo,Ib (SSE5A) PCOMccUD #2 VDo,Vo,Wo,Ib (SSE5A) PCOMccUQ #2 VDo,Vo,Wo,Ib (SSE5A) notes descriptions #1 The condition codes are   EQ,   LT,   LE, and UNORD. They are encoded as the Ib, using 00...03h. The condition codes are UNEQ, UNLT, UNLE, and   ORD. They are encoded as the Ib, using 04...07h. The condition codes are  UEQ,  ULT,  ULE, and FALSE. They are encoded as the Ib, using 08...0Bh. The condition codes are  NEQ,  NLT,  NLE, and  TRUE. They are encoded as the Ib, using 0C...0Fh. #2 The condition codes are LT, LE, GT, GE, EQ, NEQ, FALSE, and TRUE. They are encoded as the Ib, using 00...07h. pre- fix 0Fh 7Ah xxh   x0h   x1h x2h x3h x4h x5h x6h x7h   n/a   1xh FRCZPS Vo,Wo (SSE5A) FRCZPD Vo,Wo (SSE5A) FRCZSS Vd,Wd (SSE5A) FRCZSD Vq,Wq (SSE5A)   n/a   3xh CVTPH2PS Vo,Wq (SSE5A) CVTPS2PH Wq,Vo (SSE5A)   n/a   4xh PHADDBW Vo,Wo (SSE5A) PHADDBD Vo,Wo (SSE5A) PHADDBQ Vo,Wo (SSE5A) PHADDWD Vo,Wo (SSE5A) PHADDWQ Vo,Wo (SSE5A)   n/a   5xh PHADDUBW Vo,Wo (SSE5A) PHADDUBD Vo,Wo (SSE5A) PHADDUBQ Vo,Wo (SSE5A) PHADDUWD Vo,Wo (SSE5A) PHADDUWQ Vo,Wo (SSE5A)   n/a   6xh PHSUBBW Vo,Wo (SSE5A) PHSUBWD Vo,Wo (SSE5A) PHSUBDQ Vo,Wo (SSE5A) pre- fix 0Fh 7Ah xxh   x8h   x9h xAh xBh xCh xDh xEh xFh   n/a   4xh PHADDDQ Vo,Wo (SSE5A)   n/a   5xh PHADDUDQ Vo,Wo (SSE5A) pre- fix 0Fh 7Bh xxh   x0h   x1h x2h x3h x4h x5h x6h x7h   n/a   4xh PROTB Vo,Wo,Ib (SSE5A) PROTW Vo,Wo,Ib (SSE5A) PROTD Vo,Wo,Ib (SSE5A) PROTQ Vo,Wo,Ib (SSE5A)