Single Instruction Multiple Data


SIMD stands for Single Instruction Multiple Data. It is a type of parallel processing that allows a single instruction to be executed on multiple data elements in parallel.

SIMD instructions can greatly increase performance when the same operations are to be performed on multiple data objects.

SIMD extensions are extra instructions that were added to the x86 architecture to support vector-like operations, such as:

  • MMX

    • Only worked on integers

  • SSE

    • SSE floating-point instructions operate on a new independent register set

    • Arm Neon technology is an advanced SIMD architecture extension

  • AVX


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