Research On Technology Of Coprocessor Design

Coprocessor is a crucial part of high-speed and high-precision, whose performance directly affects the capabilities of system floating-point execution. The paper puts emphasis on research and design of coprocessor algorithm, data path, control path and modules. The results of research have been successfully applied to the design of military coprocessor that is compatible with M80C287.Under the constraints such as performance, timing, area, power, process and so on design of coprocessor is optimized considering architecture, algorithm, data path, and implementation of circuits. On the one hand it is important for the design of Floating-point Processor Unit to optimize speed while algorithms of high-speed are introduced. For examples, Two-path of high-speed floating-point addition, Booth coding of floating-point multiplication. SRT of floating-point division and square root, CORDIC of transcendental function and so on. On the other hand the style of PLA is used for optimization of area in the Control Unit. Finally, the system functions of instructions are simulated and verified under the test platform after the test model has been established.The author is absorbed in research on technology of coprocessor design. In the floating-point addition the paper proposes a carry chain of dynamic and static mixed circuits and a good balance between speed and area of predicting leading-zero logic circuits, considering algorithm and construction of logic circuits. An approach of Micro program Controller design for coprocessor is put forward and a test bench is given to verify its function.