Abstract: YHFT-DX developed by NUDT is a high performance fix-point DSP processor.This paper designs the instruction control pipeline of YHFT-DX，and presents the non-align dispatch and instruction pre-fetch mechanism to achieve high pipeline performance of the VLIW YHFT-DX.At the same time，the structure of the instruction pipeline is optimized for high performance.The critical path of instruction dispatch unit is reduced by 40%，which meets the 600 MHz design objective of the chip.

Key words: Digital Signal Processor（DSP）, Very Long Instruction Word（VLIW）, pipeline, nonalign dispatch, instruction pre-fetch

摘要： YHFT-DX是国防科技大学设计的一款高性能定点DSP。论文设计并实现了YHFT-DX指令控制流水线，提出了在YHFT-DX 超长指令字结构中跨取指包边界派发和指令预取的方法，有效提升了流水线的性能。对指令流水线进行了高频结构优化，将派发部件的关键路径延时压缩40%，满足了600 MHz频率的设计目标。

关键词: 数字信号处理器, 超长指令字, 流水线, 跨边界派发, 指令预取