ORC2DSP: Compiler Infrastructure Supports for VLIW DSP Processors

In this paper, we describe our experiences in deploying ORC infrastructures for a novel 32-bit VLIW DSP processor (known as PAC core), which equips with new architectural features, such as distributed and ‘ping-pong’ register files. We also present methods in retargeting ORC compilers for PAC VLIW DSP processors. In addition, mechanisms are proposed to incorporate register allocation policies in the compiler framework for distributed register files in PAC architectures. In the early design stage, several iterations of tuning are needed between architecture and software designs. Our work gives an early estimation of architecture performance so that refinements of architectures are possible with the software feedbacks.