This is a quick reference for Intel's Streaming SIMD Extensions. Feel free to make additions or corrections!

The vector types here are named with the same convention as in Factor's SIMD library. It should be obvious what they mean:

- char-16
- uchar-16
- short-8
- ushort-8
- int-4
- uint-4
- longlong-2
- ulonglong-2
- float-4
- double-2

The number next to each instruction is the SSE version:

char-16 | uchar-16 | short-8 | ushort-8 | int-4 | uint-4 | longlong-2 | ulonglong-2 | float-4 | double-2 | |

move^{*} | MOVDQ[AU] 2 | MOVDQ[AU] 2 | MOVDQ[AU] 2 | MOVDQ[AU] 2 | MOVDQ[AU] 2 | MOVDQ[AU] 2 | MOVDQ[AU] 2 | MOVDQ[AU] 2 | MOV[AU]PS 1 | MOV[AU]PD 2 |

add | PADDB 2 | PADDB 2 | PADDW 2 | PADDW 2 | PADDD 2 | PADDD 2 | PADDQ 2 | PADDQ 2 | ADDPS 1 | ADDPD 2 |

subtract | PSUBB 2 | PSUBB 2 | PSUBW 2 | PSUBW 2 | PSUBD 2 | PSUBD 2 | PSUBQ 2 | PSUBQ 2 | SUBPS 1 | SUBPD 2 |

saturated add | PADDSB 2 | PADDUSB 2 | PADDSW 2 | PADDUSW 2 | ||||||

saturated subtract | PSUBSB 2 | PSUBUSB 2 | PSUBSW 2 | PSUBUSW 2 | ||||||

add-subtract | ADDSUBPS 3 | ADDSUBPD 3 | ||||||||

horizontal add | PHADDW 3.3 | PHADDW 3.3 | PHADDD 3.3 | PHADDD 3.3 | HADDPS 3 | HADDPD 3 | ||||

multiply | PMULLW 2 | PMULLW 2 | PMULLD 4.1 | PMULLD 4.1 | MULPS 1 | MULPD 2 | ||||

divide | DIVPS 1 | DIVPD 2 | ||||||||

absolute value | PABSB 3.3 | PABSW 3.3 | PABSD 3.3 | |||||||

minimum | PMINSB 4.1 | PMINUB 2 | PMINSW 2 | PMINUW 4.1 | PMINSD 4.1 | PMINUD 4.1 | MINPS 1 | MINPD 2 | ||

maximum | PMAXSB 4.1 | PMAXUB 2 | PMAXSW 2 | PMAXUW 4.1 | PMAXSD 4.1 | PMAXUD 4.1 | MAXPS 1 | MAXPD 2 | ||

approx reciprocal | RCPPS 1 | |||||||||

square root | SQRTPS 1 | SQRTPD 2 | ||||||||

comparison | PCMPxxB^{†} 2 | PCMPxxB^{†} 2 | PCMPxxW^{†} 2 | PCMPxxW^{†} 2 | PCMPxxD^{†} 2 | PCMPxxD^{†} 2 | CMPxxxPS^{‡} 1 | CMPxxxPD^{‡} 2 | ||

bitwise and | PAND 2 | PAND 2 | PAND 2 | PAND 2 | PAND 2 | PAND 2 | PAND 2 | PAND 2 | ANDPS 1 | ANDPD 2 |

bitwise and-not | PANDN 2 | PANDN 2 | PANDN 2 | PANDN 2 | PANDN 2 | PANDN 2 | PANDN 2 | PANDN 2 | ANDNPS 1 | ANDNPD 2 |

bitwise or | POR 2 | POR 2 | POR 2 | POR 2 | POR 2 | POR 2 | POR 2 | POR 2 | ORPS 1 | ORPD 2 |

bitwise xor | PXOR 2 | PXOR 2 | PXOR 2 | PXOR 2 | PXOR 2 | PXOR 2 | PXOR 2 | PXOR 2 | XORPS 1 | XORPD 2 |

load mask | PMOVMSKB 2 | PMOVMSKB 2 | PMOVMSKB 2 | PMOVMSKB 2 | PMOVMSKB 2 | PMOVMSKB 2 | PMOVMSKB 2 | PMOVMSKB 2 | MOVMSKPS 1 | MOVMSKPD 2 |

shift left | PSLLW 2 | PSLLW 2 | PSLLD 2 | PSLLD 2 | PSLLQ 2 | PSLLQ 2 | ||||

shift right | PSRAW 2 | PSRLW 2 | PSRAD 2 | PSRLD 2 | PSRLQ 2 | |||||

unpack low | PUNPCKLBW 2 | PUNPCKLBW 2 | PUNPCKLWD 2 | PUNPCKLWD 2 | PUNPCKLDQ 2 | PUNPCKLDQ 2 | PUNPCKLQDQ 2 | PUNPCKLQDQ 2 | UNPCKLPS 1 | UNPCKLPD 2 |

unpack high | PUNPCKHBW 2 | PUNPCKHBW 2 | PUNPCKHWD 2 | PUNPCKHWD 2 | PUNPCKHDQ 2 | PUNPCKHDQ 2 | PUNPCKHQDQ 2 | PUNPCKHQDQ 2 | UNPCKHPS 1 | UNPCKHPD 2 |

static shuffle^{§} | PSHUF[HL]W^{‖} 2 | PSHUF[HL]W^{‖} 2 | PSHUFD 2 | PSHUFD 2 | PSHUFD 2 | PSHUFD 2 | SHUFPS^{¶} 1 | SHUFPD^{¶} 2 | ||

variable shuffle | PSHUFB 3.3 | PSHUFB 3.3 | PSHUFB 3.3 | PSHUFB 3.3 | PSHUFB 3.3 | PSHUFB 3.3 | PSHUFB 3.3 | PSHUFB 3.3 | ||

static blend | PBLENDW 4.1 | PBLENDW 4.1 | PBLENDW 4.1 | PBLENDW 4.1 | PBLENDW 4.1 | PBLENDW 4.1 | BLENDPS 4.1 | BLENDPD 4.1 | ||

variable blend^{#} | PBLENDVB 4.1 | PBLENDVB 4.1 | PBLENDVB 4.1 | PBLENDVB 4.1 | PBLENDVB 4.1 | PBLENDVB 4.1 | PBLENDVB 4.1 | PBLENDVB 4.1 | BLENDVPS 4.1 | BLENDVPD 4.1 |

Notes:

- The SSE2 integer SIMD mnemonics are the same as the MMX mnemonics; however, using them with SSE XMM registers rather than MMX MM registers generates different instructions.
- There are many more instructions that do not fit in this grid, but these are the most important ones to know.
- * Every move instruction has an aligned (A) and unaligned (U) form. Aligned is faster, but will trap if your address is not a multiple of 16 bytes.
- † Equality (PCMPEQ_) and signed greater-than (PCMPGT_) operations are provided for integer vectors. For signed less-than, invert the operands. For signed less/greater-than-or-equal, perform the PCMPEQ and PCMPGT comparisons and POR the results together. For unsigned tests, bias the inputs by PXORing 0x80, 0x8000, or 0x80000000 to the components.
- ‡ The following floating-point comparison operations are provided: EQ, LT, LE, UNORD, NEQ, NLT, NLE, and ORD. To get greater-than comparisons, invert the operands. LT, LE, NLT, and NLE are ordered comparisons and will raise the Invalid floating-point exception if a NaN is input.
- § Some shuffle patterns for some vector types can be achieved with specialized instructions that may have better performance or code size than the generalized shuffle instruction. See "Special shuffles" under each vector type below.
- ‖ 16-bit element shuffles only shuffle half of the register at a time.
- ¶ Floating-point shuffles select the high element(s) from the source register and the low element(s) from the destination. To shuffle a single vector, use the same register for source and destination.
- # Variable blends take the blend mask from XMM0 as an implicit operand.

To a GPR: (requires SSE 4.1)

pextrd eax, xmm0, n

To low element of an XMM register:

Use [{movd eax, xmm0}] to

punpckldq xmm0, xmm1 ; xmm0 => ? ? 1 0 punpckldq xmm2, xmm3 ; xmm2 => ? ? 3 2 punpcklqdq xmm0, xmm2 ; xmm0 => 3 2 1 0

Element 0 is a no-op:

movss dst, src

Element 1:

movshdup dst, src

Element 2:

movhlps dst, src

Element 3:

movaps dst, src shufps dst, dst, 0xff ; 3 3 3 3

unpcklps dst, src2 unpcklps src3, src4 movlhps dst, src3

movss dst, src shufps dst, dst, 0x0

movaps xmm1, xmm0 shufps xmm0, xmm1, 0xb1 ; 1 0 3 2 addps xmm0, xmm1 movaps xmm1, xmm0 shufps xmm0, xmm0, 0x0a ; 2 2 0 0 addps xmm0, xmm1

order | code |

0 0 2 2 | movsldup dst, src |

1 1 3 3 | movshdup dst, src |

0 1 0 1 | movlhps dst, dst |

2 3 2 3 | movhlps dst, dst |

0 0 1 1 | unpcklps dst, dst |

2 2 3 3 | unpckhps dst, dst |

movsd dst, src1 unpcklpd dst, src2

movddup dst, src

movapd xmm1, xmm0 unpckhpd xmm1, xmm1 addsd xmm0, xmm1

order | code |

0 0 | unpcklpd dst, dst or movddup dst, src |

1 1 | unpckhpd dst, dst |

For full details, consult Intel's or AMD's instruction set reference documentation.

*This revision created on Mon, 28 Sep 2009 18:51:38 by jckarter
*