Answer by Peter Cordes for different results with and without SSE ( float...
FP addition is not perfectly associative, so a different order of operations produces slightly different rounding errors.Your C sums elements in order. (Unless you use -ffast-math to allow the compiler...
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According to IEEE standard Formats, 32-bit float can only guanartee 6-7 digits accuracy. Your error is so marginal that no plausible claim can be made on compiler's mechanism. If you want to achieve...
View Articledifferent results with and without SSE ( float arrays multiplication)
I have two functions of 2d arrays multiplication. One of them with SSE. Another function without any optimization. Both functions work well. But the results are slightly different. For example...
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