Hi,

Basic operations (+,-,*) between vectors/arrays of type Eigen::Array<float,4,1> are translated to direct SSE instructions.

What should I espect for sizes that are multiple of 4 like Eigen::Array<float,8,1> and for other sizes like Eigen::Array<float,7,1> ?

Thank you for your help.

Laurent

for integer multiples of the register size (e.g., 4, 8, 12, etc. for float/SSE) then they are directly translated to SSE instructions and explicitly unrolled using meta-programming. For other dimensions, no vectorization occurs.

Thanx Gaël !