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SSE2Streaming SIMD (Single Instruction Multiple Data) Extensions 2 (Intel Pentium 4)
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SSE2 can implement up to 16 integers simultaneously, while SAD only needs to perform a subtraction operation of 8-bit integers.
This version exploits vector instructions on Pentium 4 processors (these instructions are called SSE2 instructions).
Specifically, Solaris 9 now supports the SSE and SSE2 instruction extensions in the Xeon and Opteron processors; it also supports the HyperThreading simultaneous multithreading that Intel offers with the Xeons.