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Many processors, such as Intel Xeon processor 5100 series, AMD Athlon 64, support SIMD computation model with the Streaming SIMD Extensions (SSE), SSE2 and SSE3. Using double-precision SSE/SSE2/SSE3 instructions simultaneously can handle two packed double-precision floating-point data elements with 128-bit XMM vector registers, which greatly improves floating-point performance. Sometimes non-consecutive...