给出系统的整体框架设计和各模块的实现，包括芯片的选择、各模块之间的时序以及控制、每个运算模块详细的工作原理和算法设计流程；通过VHDL语言编程来实现浮点数的加减、乘除和开方等基本运算功能；在Xilinx ISE环境下，对系统的主要模块进行开发设计及功能仿真，验证

了基于FPGA的浮点运算。

-The overall framework of system design and realization of each module which contain selection of chip，timing and control between modules，detailed principle and design process of algorithm for each module were all described；The basic calculating functions of floating-point numbers，such as addition, subtraction，multiplication，division and extraction were implemented with VHDL. In the circumstance of Xilinx ISE，the development and functional simulation for main modules of system were accomplished，and then floating point calculation based on FPGA Was confirmed