Shake And Bake: a method of mapping code to irregular DSPs

Generating high quality code for embedded processors is made difficult by irregular architectures and highly encoded parallel instructions. Rather than deal with the target machine at every stage of compilation, a promising new methodology employs generic algorithms to optimize code for an idealized abstraction of the true target machine. This code is then mapped to the real instruction set by enhanced genetic algorithms. One perturbs the original schedule to find a number of alternative (parallel) instruction sequences, and the other evolves feasible register assignments, if possible, for each sequence. This paper outlines the strategy for mapping idealized code into actual code. The COGEN(T) system employs this methodology to produce good code for different commercial DSPs