First commit post 0.90 branch

1. a21b2e8 Add DIM operator to reference model by Won Jeon · 11 months ago
2. 9c9c8da Run clang-format and update copyright by Jerry Ge · 12 months ago
3. edac6ab Fix missing template instantiations by Eric Kunze · 1 year ago
4. a4d748b [reference model] Add precise mode by Tai Ly · 1 year, 3 months ago