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x86 Opcode Map

Reverse lookup instructions by their hexadecimal encoding.

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Opcode Mnemonic Syntax Format Name
NP 0F DD /r1 paddusw PADDUSW mm, mm/m64 MMX Packed Add Unsigned Saturate Word (MMX)
66 0F DD paddusw PADDUSW xmm1, xmm2/m128 SSE2 Packed Add Unsigned Saturation Word
66 0F FD paddw PADDW xmm, xmm/m128 SSE2 Packed Add Words
66 0F 3A 0F palignr PALIGNR xmm1, xmm2/m128, imm8 SSSE3 Packed Align Right
NP 0F DB /r1 pand PAND mm, mm/m64 MMX Packed Logical AND (MMX)
66 0F DB pand PAND xmm, xmm/m128 SSE2 Packed Logical AND
NP 0F DF /r1 pandn PANDN mm, mm/m64 MMX Packed Logical AND NOT (MMX)
F3 90 pause PAUSE Legacy Spin Loop Hint
66 0F E0 pavgb PAVGB xmm1, xmm2/m128 SSE2 Average Packed Integers (Byte)
66 0F E3 pavgw PAVGW xmm1, xmm2/m128 SSE2 Average Packed Integers (Word)
66 0F 38 10 pblendvb PBLENDVB xmm1, xmm2/m128, <XMM0> SSE4.1 Variable Blend Packed Bytes
66 0F 3A 0E pblendw PBLENDW xmm1, xmm2/m128, imm8 SSE4.1 Packed Blend Words
66 0F 3A 44 pclmulqdq PCLMULQDQ xmm1, xmm2/m128, imm8 PCLMUL Carry-Less Multiplication
NP 0F 74 /r1 pcmpeqb PCMPEQB mm, mm/m64 MMX Packed Compare Equal Byte (MMX)
66 0F 74 pcmpeqb PCMPEQB xmm, xmm/m128 SSE2 Packed Compare Equal Byte
NP 0F 76 /r1 pcmpeqd PCMPEQD mm, mm/m64 MMX Packed Compare Equal Doubleword (MMX)
66 0F 76 pcmpeqd PCMPEQD xmm, xmm/m128 SSE2 Packed Compare Equal Doubleword
66 0F 38 29 pcmpeqq PCMPEQQ xmm1, xmm2/m128 SSE4.1 Packed Compare Equal Quadword
NP 0F 75 /r1 pcmpeqw PCMPEQW mm, mm/m64 MMX Packed Compare Equal Word (MMX)
66 0F 75 pcmpeqw PCMPEQW xmm, xmm/m128 SSE2 Packed Compare Equal Word
66 0F 3A 61 pcmpestri PCMPESTRI xmm1, xmm2/m128, imm8 SSE4.2 Packed Compare Explicit Length Strings, Return Index
66 0F 3A 60 pcmpestrm PCMPESTRM xmm1, xmm2/m128, imm8 SSE4.2 Packed Compare Explicit Length Strings, Return Mask
NP 0F 64 /r1 pcmpgtb PCMPGTB mm, mm/m64 MMX Packed Compare Greater Than Byte (MMX)
66 0F 64 pcmpgtb PCMPGTB xmm1, xmm2/m128 SSE2 Packed Compare Greater Than Byte
NP 0F 66 /r1 pcmpgtd PCMPGTD mm, mm/m64 MMX Packed Compare Greater Than Doubleword (MMX)
66 0F 66 pcmpgtd PCMPGTD xmm1, xmm2/m128 SSE2 Packed Compare Greater Than Doubleword
66 0F 38 37 pcmpgtq PCMPGTQ xmm1, xmm2/m128 SSE4.2 Packed Compare Greater Than Quadword
NP 0F 65 /r1 pcmpgtw PCMPGTW mm, mm/m64 MMX Packed Compare Greater Than Word (MMX)
66 0F 65 pcmpgtw PCMPGTW xmm1, xmm2/m128 SSE2 Packed Compare Greater Than Word
66 0F 3A 63 pcmpistri PCMPISTRI xmm1, xmm2/m128, imm8 SSE4.2 Packed Compare Implicit Length Strings, Return Index
NP 0F 01 C5 pconfig PCONFIG Legacy Platform Configuration
VEX.LZ.F2.0F38.W0 F5 /r pdep PDEP r32, r32, r/m32 VEX Parallel Bits Deposit
VEX.LZ.F3.0F38.W0 F5 /r pext PEXT r32, r32, r/m32 VEX Parallel Bits Extract
66 0F 3A 14 pextrb PEXTRB r32/m8, xmm1, imm8 SSE4.1 Packed Extract Byte
66 0F 3A 16 pextrd PEXTRD r32/m32, xmm1, imm8 SSE4.1 Packed Extract Doubleword
66 REX.W 0F 3A 16 /r ib pextrq PEXTRQ r64/m64, xmm1, imm8 SSE4.1 Packed Extract Quadword
66 0F C5 pextrw PEXTRW r32, xmm1, imm8 SSE Packed Extract Word
0F 0F /r 9E pfadd PFADD mm, mm/m64 3DNow! Packed Floating-Point Add
0F 0F /r B4 pfmul PFMUL mm, mm/m64 3DNow! Packed Floating-Point Multiply
0F 0F /r 96 pfrcp PFRCP mm, mm/m64 3DNow! Packed Floating-Point Reciprocal
0F 0F /r 97 pfrsqrt PFRSQRT mm, mm/m64 3DNow! Packed Floating-Point Reciprocal Square Root
0F 0F /r 9A pfsub PFSUB mm, mm/m64 3DNow! Packed Floating-Point Subtract
66 0F 38 01 phaddw PHADDW xmm1, xmm2/m128 SSSE3 Packed Horizontal Add Word
66 0F 38 41 phminposuw PHMINPOSUW xmm1, xmm2/m128 SSE4.1 Packed Horizontal Minimum
66 0F 38 06 phsubd PHSUBD xmm1, xmm2/m128 SSSE3 Packed Horizontal Subtract Doubleword
66 0F 38 05 phsubw PHSUBW xmm1, xmm2/m128 SSSE3 Packed Horizontal Subtract Word
66 0F 3A 20 pinsrb PINSRB xmm1, r32/m8, imm8 SSE4.1 Packed Insert Byte
66 0F 3A 22 pinsrd PINSRD xmm1, r32/m32, imm8 SSE4.1 Packed Insert Doubleword
66 REX.W 0F 3A 22 /r ib pinsrq PINSRQ xmm1, r64/m64, imm8 SSE4.1 Packed Insert Quadword
66 0F C4 pinsrw PINSRW xmm1, r32/m16, imm8 SSE Packed Insert Word
66 0F 38 04 pmaddubsw PMADDUBSW xmm1, xmm2/m128 SSSE3 Multiply and Add Packed Signed and Unsigned Bytes
NP 0F F5 /r1 pmaddwd PMADDWD mm, mm/m64 MMX Packed Multiply Add Word to Doubleword (MMX)
66 0F F5 pmaddwd PMADDWD xmm1, xmm2/m128 SSE2 Packed Multiply and Add Word to Doubleword
66 0F 38 3C pmaxsb PMAXSB xmm1, xmm2/m128 SSE4.1 Maximum of Packed Signed Byte Integers
66 0F 38 3D pmaxsd PMAXSD xmm1, xmm2/m128 SSE4.1 Maximum of Packed Signed Doubleword Integers
66 0F EE pmaxsw PMAXSW xmm1, xmm2/m128 SSE2 Maximum of Packed Signed Word Integers
66 0F DE pmaxub PMAXUB xmm1, xmm2/m128 SSE2 Maximum of Packed Unsigned Byte Integers
66 0F 38 3F pmaxud PMAXUD xmm1, xmm2/m128 SSE4.1 Maximum of Packed Unsigned Doubleword Integers
66 0F 38 3E pmaxuw PMAXUW xmm1, xmm2/m128 SSE4.1 Maximum of Packed Unsigned Word Integers
66 0F 38 38 pminsb PMINSB xmm1, xmm2/m128 SSE4.1 Minimum of Packed Signed Byte Integers
66 0F 38 39 pminsd PMINSD xmm1, xmm2/m128 SSE4.1 Minimum of Packed Signed Doubleword Integers
66 0F EA pminsw PMINSW xmm1, xmm2/m128 SSE2 Minimum of Packed Signed Word Integers
66 0F DA pminub PMINUB xmm1, xmm2/m128 SSE2 Minimum of Packed Unsigned Byte Integers
66 0F 38 3B pminud PMINUD xmm1, xmm2/m128 SSE4.1 Minimum of Packed Unsigned Doubleword Integers
66 0F 38 3A pminuw PMINUW xmm1, xmm2/m128 SSE4.1 Minimum of Packed Unsigned Word Integers
66 0F D7 pmovmskb PMOVMSKB r32, xmm SSE2 Move Byte Mask
66 0F 38 22 pmovsxbq PMOVSXBQ xmm1, xmm2/m16 SSE4.1 Packed Move with Sign Extend Byte to Quadword
66 0F 38 20 pmovsxbw PMOVSXBW xmm1, xmm2/m64 SSE4.1 Packed Move with Sign Extend Byte to Word
66 0F 38 25 pmovsxdq PMOVSXDQ xmm1, xmm2/m64 SSE4.1 Packed Move with Sign Extend Doubleword to Quadword
66 0F 38 23 pmovsxwd PMOVSXWD xmm1, xmm2/m64 SSE4.1 Packed Move with Sign Extend Word to Doubleword
66 0F 38 24 pmovsxwq PMOVSXWQ xmm1, xmm2/m32 SSE4.1 Packed Move with Sign Extend Word to Quadword
66 0F 38 31 pmovzxbd PMOVZXBD xmm1, xmm2/m32 SSE4.1 Packed Move with Zero Extend Byte to Doubleword
66 0F 38 32 pmovzxbq PMOVZXBQ xmm1, xmm2/m16 SSE4.1 Packed Move with Zero Extend Byte to Quadword
66 0F 38 30 pmovzxbw PMOVZXBW xmm1, xmm2/m64 SSE4.1 Packed Move with Zero Extend Byte to Word
66 0F 38 35 pmovzxdq PMOVZXDQ xmm1, xmm2/m64 SSE4.1 Packed Move with Zero Extend Doubleword to Quadword
66 0F 38 33 pmovzxwd PMOVZXWD xmm1, xmm2/m64 SSE4.1 Packed Move with Zero Extend Word to Doubleword
66 0F 38 34 pmovzxwq PMOVZXWQ xmm1, xmm2/m32 SSE4.1 Packed Move with Zero Extend Word to Quadword
66 0F 38 0B pmulhrsw PMULHRSW xmm1, xmm2/m128 SSSE3 Packed Multiply High with Round and Scale
66 0F E4 pmulhuw PMULHUW xmm1, xmm2/m128 SSE2 Packed Multiply High Unsigned
NP 0F E5 /r1 pmulhw PMULHW mm, mm/m64 MMX Packed Multiply High Word (MMX)
66 0F E5 pmulhw PMULHW xmm1, xmm2/m128 SSE2 Packed Multiply High Signed
66 0F 38 40 pmulld PMULLD xmm1, xmm2/m128 SSE4.1 Packed Multiply Low Doubleword
NP 0F D5 /r1 pmullw PMULLW mm, mm/m64 MMX Packed Multiply Low Word (MMX)
66 0F D5 pmullw PMULLW xmm1, xmm2/m128 SSE2 Packed Multiply Low Word
66 0F F4 pmuludq PMULUDQ xmm1, xmm2/m128 SSE2 Multiply Packed Unsigned Doubleword Integers
8F /0 pop POP r/m Legacy Pop Value from Stack
61 popa POPA Legacy Pop All General-Purpose Registers
F3 0F B8 popcnt POPCNT r, r/m VEX Population Count
9D popf POPF Legacy Pop Flags
NP 0F EB /r1 por POR mm, mm/m64 MMX Packed Logical OR (MMX)
66 0F EB por POR xmm, xmm/m128 SSE2 Packed Logical OR
0F 18 /0 prefetchnta PREFETCHNTA m8 SSE Prefetch Data using Non-Temporal Access
0F 18 /1 prefetcht0 PREFETCHT0 m8 SSE Prefetch Data into all Cache Levels
0F 18 /2 prefetcht1 PREFETCHT1 m8 SSE Prefetch Data to L2 Cache
0F 18 /3 prefetcht2 PREFETCHT2 m8 SSE Prefetch Data to L3 Cache
0F 0D /1 prefetchw PREFETCHW m8 Legacy Prefetch Data into Caches in Anticipation of a Write
0F 0D /2 prefetchwt1 PREFETCHWT1 m8 Legacy Prefetch Hint T1 with Intent to Write
66 0F F6 psadbw PSADBW xmm1, xmm2/m128 SSE2 Compute Sum of Absolute Differences
66 0F 38 00 pshufb PSHUFB xmm1, xmm2/m128 SSSE3 Packed Shuffle Bytes
66 0F 70 pshufd PSHUFD xmm, xmm/m128, imm8 SSE2 Packed Shuffle Doubleword