CxxUtils: vectorization helper
Add a nice alias vec<T, N> for gcc/clang's built-in vectorized types, with a fallback to a (mostly) compatible C++ class for other compilers.
Also provide a few helpers: vec_type_t, vec_size(), and vbroadcast().
Add a nice alias vec<T, N> for gcc/clang's built-in vectorized types, with a fallback to a (mostly) compatible C++ class for other compilers.
Also provide a few helpers: vec_type_t, vec_size(), and vbroadcast().