关键词: NUAL 精确中断 重放缓冲

Abstract:

Precise interrupt is the key to debugging in any processor.Due to the characteristics of the NUAL program,it is difficult to implement precise interrupts in a NUAL processor.Researchers have proposed the replay buffer and the current-state buffer mechanism to resolve this problem.However,the former is  not cost-effective and the latter needs the support of a compiler.This paper proposes a result write-back buffer mechanism to implement precise interru pts in the NUAL processors,illustrates its realizable structure,and validates this mechanism by modeling and simulation.At the end of this paper,we comp are three mechanisms from various perspectives.Results show that the result write-back buffer mechanism is better than the replay buffer in all perspect ives,and better than the current-state buffer overally too.

Key words: NUAL;precise interrupt;replay buffer