Multi-target DSP compiler

摘要

A multi-target DSP compiler is presented. This compiler can generate assembler codes for a user-selected DSP among multiple target DSPs registered in database. The compiler uses the same frontend and the computational ordering modules in the existing DSP compiler for digital signal processing algorithms. A code generation module together with rule database is newly introduced. The code generation module consists of 4 phases; i.e. serial-code generation, memory allocation and addressing operation assignment, code parallelization, and code optimization. In each phase, rule database is refered to find appropriate code generation rules for a target DSP name and types of intermediate codes. Users can easily add rules for a newcoming DSPs into the database. The proposed compiler is written in C++, and works on PC. An example rule database is prepared for 4 different types of DSPs, i.e. μ PD77230A(NEC), TMS320C3x, TMS320C5x(TI), 56000 (Motorola). For each target DSP, codes for several example programs are generated. The result shows that the multi-target compiler is comparable to the previous compiler in terms of code efficiency.