Abstract: Disclosed herein is a method for performing top-down design for optimizing synthesizable FPGA fabrics which eliminates the need for floorplanning and manual buffering by providing a global timing view of the FPGA fabric to the electronic design automation (EDA) tools. This is accomplished by providing the EDA tools with a global timing view spanning multiple tiles. The method restructures the switch-box muliplexers in a unique way to enable the use of powerful static timing analysis (STA) exceptions supported by modern EDA tools to work around the problem of combinational loops and long false paths created by the interconnect mesh in the FPGA fabric.