It is thus important to use these vector instructions in order to achieve optimal hardware usage efficiency. The AVX instructions can perform eight 32-bit or four 64-bit floating point operations per clock cycle. The SSE instructions can perform four 32-bit (single precision) floating point operations or two 64-bit (double precision) floating point operations per clock cycle. These are implemented in the 128-bit Streaming SIMD Extensions (SSE) and starting with Intel's Sandy Bridge architecture, the 256-bit Advanced Vector eXtensions (AVX). ![]() ![]() Modern x86 processors include vector units that can operate on multiple data objects with a single instruction, otherwise known as Single Instruction, Multiple Data (or SIMD) units.
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