高性能算术SIMD模块的电路设计

Circuit Design of a High Performance SIMD Arithmetic Module

算术SIMD模块是我们自主设计的高性能DSP中的关键模块.基于0.13微米工艺,提出了改进的SIMD指令实现算法,设计实现了算术SIMD模块的电路与版图,根据指令特点,提出了结果产生的两级选择结构,采用有限动态电路设计了SIMD加法器和比较判零子模块.用Nanosim工具实现了版图后模拟及时序分析的自动化,版图后延时控制在750ps以内,满足了高性能DSP芯片的时序要求.

The SIMD Arithmetic module is a critical module in the high performance DSP, which developed by us. This paper presents a new algorithm for SIMD instructions, and designs the circuits and layouts of the SIMD module based on 0, 13μm CMOS technology. Based on the characteristics of the instructions, two level selection structure for results generation has been put forward, SIMD adder and compare for zero module have been designed with limited dynamic circuits. Simulation and timing verification after layouts are implemented automatically by using Nanosim tool. The delay after layout is under 750ps, which can meet the timing requirements of high performance DSP.