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.

You need understanding of inner product operation and SSE technology understanding.

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.

The license of this software is Free, you can free download and free use this cpu benchmark software.