Fix MSVC complex sqrt and packetmath test. MSVC incorrectly handles `inf` cases for `std::sqrt<std::complex<T>>`. Here we replace it with a custom version (currently used on GPU). Also fixed the `packetmath` test, which previously skipped several corner cases since `CHECK_CWISE1` only tests the first `PacketSize` elements.
Eigen is a C++ template library for linear algebra: matrices, vectors, numerical solvers, and related algorithms.
For more information go to http://eigen.tuxfamily.org/.
For pull request, bug reports, and feature requests, go to https://gitlab.com/libeigen/eigen.