ERROR:Pack:2860 - The number of logical carry chain blocks exceeds the capacity for the target devic

ERROR:Pack:2860 - The number of logical carry chain blocks exceeds the capacity for the target device. This design requires 44319 slices but only has 11519 slices available that allow carry chains.

出现这个错误表示FPGA的逻辑资源不够用，正确的做法是找到消耗资源大的模块进行修改。