In Xilinx&#x27;s case, the toolchain is huge because it isn&#x27;t just bitstream synthesis; it also includes:<p>* Simulation and verification tools<p>* Licensed IP cores for a bunch of common tasks<p>* Toolchains for at least three different platforms (ARM, Microblaze, PowerPC)<p>* 32-bit and 64-bit versions of <i>everything</i><p>* A JRE<p>Bottom line is, there&#x27;s legitimately a ton of stuff in there.