On SPARC LEON-2 ISA Extensions Experiments for MPEG Encoding Acceleration

[摘要] This paper presents the necessary steps to modify the implementation of the SPARCV8 architecture to enhance it with multimedia-oriented instructions. The purpose is improving video compression performance without designing dedicatedcoprocessors. We investigate the complexity of modifying a standard processor instruction set and show that, although not trivial, this is feasible in a few weeks. Weimplemented 12 new instructions and use some of them to optimize the computationof a demanding step of the MPEG encoding. The result is a performance increase of 67% in the execution of a part of this algorithm, allowing us to expect a 30% speedup inthe execution of an MPEG video compression. The area increase of the integer unit is about18% and the clock frequency is not significantly modified in an LEON-2 implementing 6 among12 of the new instructions.

[学科分类] 电子、光学、磁材料