浮点及整数混合运算器的设计与实现

Design and Implementation for a Integer-Float ALU

针对现行普遍的浮点运算器耗费面积较大,功能实现结构松散的问题,设计实现一款浮点及整数混合运算器(Mixture-Arithmetic Logic Unit,M-ALU).该运算器基于基4算法华莱士树型结构,并尝试一种新的阶码对齐方法,合并整数运算与浮点运算处理逻辑.在三级流水线结构下可准确完成单精度浮点数,扩展精度浮点数以及整数基本运算.采用基于synopsys提供的Design Compler综合工具在SMIC 65nm工艺库下完成综合,达到500MHz主频.

For solve the issue that commont floating pointe ALU comsumes large area and srtucture loosely, afloating point and integer mixed operator M-ALU are designed and implemented. The algorithm based on the base-4algorithm Wallace tree structure, and try a new order code alignment method, merging integer arithmetic andfloating point arithmetic processing logic. In the three-stage pipeline structure can be accurately completed singlcprecision floating-point, extended precision floating-point and integer basic operations. Based on the synopsysprovided by the Design Compiler synthesis tool in the SMIC 65nm process library to complete the synthesis, to 500MHz frequency.