pattern muldiv state t x y match mul select mul->type == $mul select GetSize(port(mul, \A)) + GetSize(port(mul, \B)) <= GetSize(port(mul, \Y)) endmatch code t x y t = port(mul, \Y); x = port(mul, \A); y = port(mul, \B); branch; std::swap(x, y); endcode match div select div->type.in($div) index port(div, \A) === t index port(div, \B) === x endmatch code SigSpec div_y = port(div, \Y); SigSpec val_y = y; if (GetSize(div_y) != GetSize(val_y)) val_y.extend_u0(GetSize(div_y), param(div, \A_SIGNED).as_bool()); did_something = true; log("muldiv pattern in %s: mul=%s, div=%s\n", log_id(module), log_id(mul), log_id(div)); module->connect(div_y, val_y); autoremove(div); accept; endcode