Inner Shorts, ints, floats and doubles with CPU / FPU and SSE for comparison
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CPU remove doubles SSE find doubles doubles finder doubles FPU speed FPU Tester FPU SSE instruction CPU comparison FPU comparison SSE comparison Shorts

Inner Description

This tool was developed to be a small test tool which demonstrates inner product operation performed with shorts, ints, floats and doubles with CPU / FPU and SSE for comparison. The inner product (or dot product, scalar product) operation is the major one in digital signal processing field. It is used everywhere, Fourier (FFT, DCT), wavelet-analysis, filtering operations and so on. With advances of SSE technology you can parallelize this operation to perform multiplication and addition on several numbers instantly. However what precision in calculations to choose, integer, floats, doubles? In this article I demonstrate inner product operation on shorts, ints, floats, doubles performed with both CPU and SSE/SSE2/SSE3 optimized versions.Just run the console application and provide the first argument as the length of array for inner product. It creates 2 vectors of the same length with random entries and computes their inner product printing the results and processing times for chars, shorts/shorts SSE2, ins, floats/floats SSE/floats SSE3, doubles/doubles SSE2.

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