Implement csqrt

[tylera-nvidia]

Add a complex sqrt function equivalent to the C++ functionality of csqrt,

The high-level functionality supported is to always generate a complex return, even if the input is only real. I've come across situations where users sqrt negative data, with the expectation of getting complex from real.

[tylera-nvidia]

@cliffburdick @luitjens. This is the implementation of csqrt we discussed in 2022. There is a C++ implementation of csqrt, however I was not able to get that function to compile in a .cu file, as it doesn't look like nvcc supports it. I was able to get equivalent functionality using a static cast prior to making the sqrt call, however I imagine this does leave us open to a divergent behavior to the C++ csqrt if that behavior ever changes. Any thoughts on if that makes this function still "worth it"?

[cliffburdick]

2 comments left

[cliffburdick]

/blossom-ci

[cliffburdick]

/blossom-ci

[tylera-nvidia]

/blossom-ci