This is a quick reference for Intel's Streaming SIMD Extensions.

Vector types

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
• float-4
• double-2

Instruction set

The number next to each instruction is the SSE version:

• 1: SSE
• 2: SSE2
• 3: SSE3
• 3.3: SSSE3
• 4.1: SSE4.1
• 4.2: SSE4.2

Idioms

int-4

Gather four integers into a vector

float-4

Gather four floats into a vector

Broadcast float into four components

double-2

Gather two doubles into a vector

Broadcast double into two components

Horizontal add with SSE2