Rapid implementation of instruction-level precision VLIW DSP simulator

To Develop a simulator of a very long instruction word(VLIW) digital signal processor(DSP) with instruction-level precision at the lowest cost,and reduce the product develop lifecycle,a develop method based on an open source simulator(gem5) is presented.Firstly,the instruction execution processes of gem5 and VLIW DSP are analyzed respectively,it is pointed out that the conflict between the sequential execution with pure 32 bit instruction environment on gem5 simulator and the parallel execution with 16/32 mixed instruction environment on VLIW DSP is one of the difficulties in the development.Then,based on the sequential execution model of gem5 simulator,a VLIW DSP model is constructed by adding a parallel judgment and execution mechanism and a 16/32 bit mix instruction fetch mechanism.A VLIW DSP simulator is implemented.Finally,by running a set of test case for every instruction and a set of typical application of DSP,the validity and feasibility of the develop method is demonstrated.