Investigate use of streaming SIMD extensions to compute TDE

[GFariasR]

we could vectorize computations, like the one below, using the SSE instructions. How does one do that? Is there any advantage?

for (std::size_t i = 0; i != tmpa_.num_elements(); ++i) {
    tmpa_.data()[i] = std::conj(tmpa_.data()[i]) * (tmpb_.data()[i]);
}

[coryan]

This link:

https://users.ece.cmu.edu/~franzf/teaching/slides-18-645-simd.pdf

has some relevant bits around slide 25. Basically there is a cool addsub instruction that helps with complex number arithmetic.

Also check:

https://en.wikipedia.org/wiki/SSE3#New_instructions